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> 22558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 23558f82efSMasahide NAKAMURA #include <net/snmp.h> 24558f82efSMasahide NAKAMURA #endif 251da177e4SLinus Torvalds 26d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 27d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 28d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 29d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 30d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 31d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 32d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 33d3d6dd3aSMasahide NAKAMURA 341da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 35b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 36b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 37d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 38d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 391da177e4SLinus Torvalds 40558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 41558f82efSMasahide NAKAMURA DECLARE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics); 42558f82efSMasahide NAKAMURA #define XFRM_INC_STATS(field) SNMP_INC_STATS(xfrm_statistics, field) 43558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_BH(field) SNMP_INC_STATS_BH(xfrm_statistics, field) 44558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_USER(field) SNMP_INC_STATS_USER(xfrm_statistics, field) 45558f82efSMasahide NAKAMURA #else 46558f82efSMasahide NAKAMURA #define XFRM_INC_STATS(field) 47558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_BH(field) 48558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_USER(field) 49558f82efSMasahide NAKAMURA #endif 50558f82efSMasahide NAKAMURA 51f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_etime; 52f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_rseqth; 53a37ae408SPavel Emelyanov extern int sysctl_xfrm_larval_drop; 54a37ae408SPavel Emelyanov extern u32 sysctl_xfrm_acq_expires; 55f8cd5488SJamal Hadi Salim 564a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 591da177e4SLinus Torvalds ------------------------------------ 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds Basic objects: 621da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 631da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 641da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 651da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 681da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 691da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 701da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 751da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 761da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 771da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 781da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 791da177e4SLinus Torvalds to a dst_entry returned to requestor. 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 821da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 831da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 841da177e4SLinus Torvalds |---. child .-> NULL 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds Resolution of xrfm_tmpl 901da177e4SLinus Torvalds ----------------------- 911da177e4SLinus Torvalds Template contains: 921da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 931da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 941da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 951da177e4SLinus Torvalds Q: allow to resolve security gateway? 961da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 971da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 981da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 991da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 1001da177e4SLinus Torvalds 7. ->share Sharing mode. 1011da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1021da177e4SLinus Torvalds flow id? 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1051da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1061da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds PROBLEMS: 1091da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1101da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1111da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1121da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1131da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1141da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1151da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1161da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1171da177e4SLinus Torvalds */ 1181da177e4SLinus Torvalds 11912a169e7SHerbert Xu struct xfrm_state_walk { 12012a169e7SHerbert Xu struct list_head all; 12112a169e7SHerbert Xu u8 state; 12212a169e7SHerbert Xu union { 12312a169e7SHerbert Xu u8 dying; 12412a169e7SHerbert Xu u8 proto; 12512a169e7SHerbert Xu }; 12612a169e7SHerbert Xu u32 seq; 12712a169e7SHerbert Xu }; 12812a169e7SHerbert Xu 1291da177e4SLinus Torvalds /* Full description of state of transformer. */ 1301da177e4SLinus Torvalds struct xfrm_state 1311da177e4SLinus Torvalds { 132673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 133673c09beSAlexey Dobriyan struct net *xs_net; 134673c09beSAlexey Dobriyan #endif 135abb81c4fSHerbert Xu union { 13612a169e7SHerbert Xu struct hlist_node gclist; 1378f126e37SDavid S. Miller struct hlist_node bydst; 138abb81c4fSHerbert Xu }; 1398f126e37SDavid S. Miller struct hlist_node bysrc; 1408f126e37SDavid S. Miller struct hlist_node byspi; 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds atomic_t refcnt; 1431da177e4SLinus Torvalds spinlock_t lock; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds struct xfrm_id id; 1461da177e4SLinus Torvalds struct xfrm_selector sel; 1471da177e4SLinus Torvalds 1489d4a706dSDavid S. Miller u32 genid; 1499d4a706dSDavid S. Miller 15012a169e7SHerbert Xu /* Key manager bits */ 15112a169e7SHerbert Xu struct xfrm_state_walk km; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds /* Parameters of this state. */ 1541da177e4SLinus Torvalds struct { 1551da177e4SLinus Torvalds u32 reqid; 1561da177e4SLinus Torvalds u8 mode; 1571da177e4SLinus Torvalds u8 replay_window; 1581da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1591da177e4SLinus Torvalds u8 flags; 1601da177e4SLinus Torvalds u16 family; 1611da177e4SLinus Torvalds xfrm_address_t saddr; 1621da177e4SLinus Torvalds int header_len; 1631da177e4SLinus Torvalds int trailer_len; 1641da177e4SLinus Torvalds } props; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* Data for transformer */ 1691da177e4SLinus Torvalds struct xfrm_algo *aalg; 1701da177e4SLinus Torvalds struct xfrm_algo *ealg; 1711da177e4SLinus Torvalds struct xfrm_algo *calg; 1721a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* Data for encapsulator */ 1751da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1761da177e4SLinus Torvalds 177060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 178060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 179060f02a3SNoriaki TAKAMIYA 1801da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1811da177e4SLinus Torvalds struct xfrm_state *tunnel; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1841da177e4SLinus Torvalds atomic_t tunnel_users; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds /* State for replay detection */ 1871da177e4SLinus Torvalds struct xfrm_replay_state replay; 1881da177e4SLinus Torvalds 189f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 190f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 191f8cd5488SJamal Hadi Salim 1922717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1932717096aSJamal Hadi Salim * moment 1942717096aSJamal Hadi Salim */ 1952717096aSJamal Hadi Salim u32 xflags; 1962717096aSJamal Hadi Salim 197f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 198f8cd5488SJamal Hadi Salim u32 replay_maxage; 199f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 200f8cd5488SJamal Hadi Salim 201f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 202f8cd5488SJamal Hadi Salim struct timer_list rtimer; 203f8cd5488SJamal Hadi Salim 2041da177e4SLinus Torvalds /* Statistics */ 2051da177e4SLinus Torvalds struct xfrm_stats stats; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2081da177e4SLinus Torvalds struct timer_list timer; 2091da177e4SLinus Torvalds 2109afaca05SMasahide NAKAMURA /* Last used time */ 211d26f3984SHerbert Xu unsigned long lastused; 2129afaca05SMasahide NAKAMURA 2131da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2141da177e4SLinus Torvalds * transformer. */ 215533cb5b0SEric Dumazet const struct xfrm_type *type; 21613996378SHerbert Xu struct xfrm_mode *inner_mode; 217df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 21813996378SHerbert Xu struct xfrm_mode *outer_mode; 2191da177e4SLinus Torvalds 220df71837dSTrent Jaeger /* Security context */ 221df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 222df71837dSTrent Jaeger 2231da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2241da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2251da177e4SLinus Torvalds void *data; 2261da177e4SLinus Torvalds }; 2271da177e4SLinus Torvalds 228673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 229673c09beSAlexey Dobriyan { 230673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 231673c09beSAlexey Dobriyan } 232673c09beSAlexey Dobriyan 2332717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2342717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2352717096aSJamal Hadi Salim 2361da177e4SLinus Torvalds enum { 2371da177e4SLinus Torvalds XFRM_STATE_VOID, 2381da177e4SLinus Torvalds XFRM_STATE_ACQ, 2391da177e4SLinus Torvalds XFRM_STATE_VALID, 2401da177e4SLinus Torvalds XFRM_STATE_ERROR, 2411da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2421da177e4SLinus Torvalds XFRM_STATE_DEAD 2431da177e4SLinus Torvalds }; 2441da177e4SLinus Torvalds 24526b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 24626b15dadSJamal Hadi Salim struct km_event 24726b15dadSJamal Hadi Salim { 248bf08867fSHerbert Xu union { 249bf08867fSHerbert Xu u32 hard; 250bf08867fSHerbert Xu u32 proto; 251bf08867fSHerbert Xu u32 byid; 252f8cd5488SJamal Hadi Salim u32 aevent; 253f7b6983fSMasahide NAKAMURA u32 type; 254bf08867fSHerbert Xu } data; 255bf08867fSHerbert Xu 25626b15dadSJamal Hadi Salim u32 seq; 25726b15dadSJamal Hadi Salim u32 pid; 25826b15dadSJamal Hadi Salim u32 event; 25926b15dadSJamal Hadi Salim }; 26026b15dadSJamal Hadi Salim 26125ee3286SHerbert Xu struct net_device; 2621da177e4SLinus Torvalds struct xfrm_type; 2631da177e4SLinus Torvalds struct xfrm_dst; 2641da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2651da177e4SLinus Torvalds unsigned short family; 2661da177e4SLinus Torvalds struct dst_ops *dst_ops; 267ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 26866cdb3caSHerbert Xu struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, 26966cdb3caSHerbert Xu xfrm_address_t *daddr); 270a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2711da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2721da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 273d5422efeSHerbert Xu struct flowi *fl, 274d5422efeSHerbert Xu int reverse); 27525ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 276a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 277a1b05140SMasahide NAKAMURA struct dst_entry *dst, 278a1b05140SMasahide NAKAMURA int nfheader_len); 27925ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 28025ee3286SHerbert Xu struct net_device *dev); 2811da177e4SLinus Torvalds }; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2841da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 28526b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 28626b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds struct xfrm_tmpl; 289980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29053bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29153bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29253bc6b4dSJamal Hadi Salim 2931da177e4SLinus Torvalds struct xfrm_state_afinfo { 29417c2a42aSHerbert Xu unsigned int family; 29536cf9acfSHerbert Xu unsigned int proto; 2968e3d716cSAl Viro __be16 eth_proto; 29717c2a42aSHerbert Xu struct module *owner; 298533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 299aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 300d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 3011da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 3021da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 3031da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 30441a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 30541a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 306cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 307227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 308227620e2SHerbert Xu struct sk_buff *skb); 30936cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31036cf9acfSHerbert Xu struct sk_buff *skb); 311716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 312716062fdSHerbert Xu int async); 3131da177e4SLinus Torvalds }; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3161da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds struct xfrm_type 3211da177e4SLinus Torvalds { 3221da177e4SLinus Torvalds char *description; 3231da177e4SLinus Torvalds struct module *owner; 3241da177e4SLinus Torvalds __u8 proto; 3251b5c2299SMasahide NAKAMURA __u8 flags; 3261b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 327436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 328f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 329f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3301da177e4SLinus Torvalds 33172cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3321da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 333e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3341da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 335df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 336aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3371da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 338c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3391da177e4SLinus Torvalds }; 3401da177e4SLinus Torvalds 341533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 342533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3431da177e4SLinus Torvalds 344b59f45d0SHerbert Xu struct xfrm_mode { 345227620e2SHerbert Xu /* 346227620e2SHerbert Xu * Remove encapsulation header. 347227620e2SHerbert Xu * 348227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 349227620e2SHerbert Xu * header. 350227620e2SHerbert Xu * 351227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 352227620e2SHerbert Xu * should be and the network header shall be set to where the IP 353227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 354227620e2SHerbert Xu * payload. 355227620e2SHerbert Xu */ 356227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 357227620e2SHerbert Xu 358227620e2SHerbert Xu /* 359227620e2SHerbert Xu * This is the actual input entry point. 360227620e2SHerbert Xu * 361227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 362227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 363227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 364227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 365227620e2SHerbert Xu */ 366b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 36737fedd3aSHerbert Xu 36837fedd3aSHerbert Xu /* 36937fedd3aSHerbert Xu * Add encapsulation header. 37037fedd3aSHerbert Xu * 37137fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37237fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37337fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 37437fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 37537fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 37637fedd3aSHerbert Xu * header. The value of the network header will always point 37737fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 37837fedd3aSHerbert Xu */ 37936cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38036cf9acfSHerbert Xu 38136cf9acfSHerbert Xu /* 38236cf9acfSHerbert Xu * This is the actual output entry point. 38336cf9acfSHerbert Xu * 38436cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 38536cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 38636cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 38736cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 38836cf9acfSHerbert Xu * call output2. 38936cf9acfSHerbert Xu */ 390eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 391b59f45d0SHerbert Xu 39217c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 393b59f45d0SHerbert Xu struct module *owner; 394b59f45d0SHerbert Xu unsigned int encap; 3951bfcb10fSHerbert Xu int flags; 3961bfcb10fSHerbert Xu }; 3971bfcb10fSHerbert Xu 3981bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3991bfcb10fSHerbert Xu enum { 4001bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 401b59f45d0SHerbert Xu }; 402b59f45d0SHerbert Xu 403b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 404b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 405b59f45d0SHerbert Xu 406df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 407df9dcb45SKazunori MIYAZAWA { 408df9dcb45SKazunori MIYAZAWA switch(family) { 409df9dcb45SKazunori MIYAZAWA case AF_INET: 410df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 411df9dcb45SKazunori MIYAZAWA case AF_INET6: 412df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 413df9dcb45SKazunori MIYAZAWA default: 414df9dcb45SKazunori MIYAZAWA return 0; 415df9dcb45SKazunori MIYAZAWA } 416df9dcb45SKazunori MIYAZAWA } 417df9dcb45SKazunori MIYAZAWA 418df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 419df9dcb45SKazunori MIYAZAWA { 420df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 421df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 422df9dcb45SKazunori MIYAZAWA return x->inner_mode; 423df9dcb45SKazunori MIYAZAWA else 424df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 425df9dcb45SKazunori MIYAZAWA } 426df9dcb45SKazunori MIYAZAWA 4271da177e4SLinus Torvalds struct xfrm_tmpl 4281da177e4SLinus Torvalds { 4291da177e4SLinus Torvalds /* id in template is interpreted as: 4301da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4311da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4321da177e4SLinus Torvalds * daddr must be fixed too. 4331da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4341da177e4SLinus Torvalds */ 4351da177e4SLinus Torvalds struct xfrm_id id; 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4381da177e4SLinus Torvalds xfrm_address_t saddr; 4391da177e4SLinus Torvalds 44076b3f055SMiika Komu unsigned short encap_family; 44176b3f055SMiika Komu 4421da177e4SLinus Torvalds __u32 reqid; 4431da177e4SLinus Torvalds 4447e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 4451da177e4SLinus Torvalds __u8 mode; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 4481da177e4SLinus Torvalds __u8 share; 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 4511da177e4SLinus Torvalds __u8 optional; 4521da177e4SLinus Torvalds 453c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 454c5d18e98SHerbert Xu __u8 allalgs; 455c5d18e98SHerbert Xu 4561da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 4571da177e4SLinus Torvalds __u32 aalgos; 4581da177e4SLinus Torvalds __u32 ealgos; 4591da177e4SLinus Torvalds __u32 calgos; 4601da177e4SLinus Torvalds }; 4611da177e4SLinus Torvalds 462622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4631da177e4SLinus Torvalds 46412a169e7SHerbert Xu struct xfrm_policy_walk_entry { 46512a169e7SHerbert Xu struct list_head all; 46612a169e7SHerbert Xu u8 dead; 46712a169e7SHerbert Xu }; 46812a169e7SHerbert Xu 46912a169e7SHerbert Xu struct xfrm_policy_walk { 47012a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47112a169e7SHerbert Xu u8 type; 47212a169e7SHerbert Xu u32 seq; 47312a169e7SHerbert Xu }; 47412a169e7SHerbert Xu 4751da177e4SLinus Torvalds struct xfrm_policy 4761da177e4SLinus Torvalds { 4770331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4780331b1f3SAlexey Dobriyan struct net *xp_net; 4790331b1f3SAlexey Dobriyan #endif 4802518c7c2SDavid S. Miller struct hlist_node bydst; 4812518c7c2SDavid S. Miller struct hlist_node byidx; 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4841da177e4SLinus Torvalds rwlock_t lock; 4851da177e4SLinus Torvalds atomic_t refcnt; 4861da177e4SLinus Torvalds struct timer_list timer; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds u32 priority; 4891da177e4SLinus Torvalds u32 index; 4901da177e4SLinus Torvalds struct xfrm_selector selector; 4911da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4921da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 4931da177e4SLinus Torvalds struct dst_entry *bundles; 49412a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49546ca5f5dSArnaldo Carvalho de Melo u8 type; 49646ca5f5dSArnaldo Carvalho de Melo u8 action; 49746ca5f5dSArnaldo Carvalho de Melo u8 flags; 49846ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 49912a169e7SHerbert Xu u16 family; 500df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5011da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5021da177e4SLinus Torvalds }; 5031da177e4SLinus Torvalds 5040331b1f3SAlexey Dobriyan static inline struct net *xp_net(struct xfrm_policy *xp) 5050331b1f3SAlexey Dobriyan { 5060331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5070331b1f3SAlexey Dobriyan } 5080331b1f3SAlexey Dobriyan 50913c1d189SArnaud Ebalard struct xfrm_kmaddress { 51013c1d189SArnaud Ebalard xfrm_address_t local; 51113c1d189SArnaud Ebalard xfrm_address_t remote; 51213c1d189SArnaud Ebalard u32 reserved; 51313c1d189SArnaud Ebalard u16 family; 51413c1d189SArnaud Ebalard }; 51513c1d189SArnaud Ebalard 51680c9abaaSShinta Sugimoto struct xfrm_migrate { 51780c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 51880c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 51980c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52080c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52180c9abaaSShinta Sugimoto u8 proto; 52280c9abaaSShinta Sugimoto u8 mode; 52380c9abaaSShinta Sugimoto u16 reserved; 52480c9abaaSShinta Sugimoto u32 reqid; 52580c9abaaSShinta Sugimoto u16 old_family; 52680c9abaaSShinta Sugimoto u16 new_family; 52780c9abaaSShinta Sugimoto }; 52880c9abaaSShinta Sugimoto 5291da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 530f8cd5488SJamal Hadi Salim /* which seqno */ 531f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 532f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 533f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 534f8cd5488SJamal Hadi Salim /* what happened */ 535f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 536f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 537f8cd5488SJamal Hadi Salim 538f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 539f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 540f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 541f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 542f8cd5488SJamal Hadi Salim /* default seq threshold size */ 543f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds struct xfrm_mgr 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds struct list_head list; 5481da177e4SLinus Torvalds char *id; 54926b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 5501da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 551cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5525d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 55326b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 55497a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 55513c1d189SArnaud Ebalard int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); 5561da177e4SLinus Torvalds }; 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5591da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5601da177e4SLinus Torvalds 561436a0a40SHerbert Xu /* 562436a0a40SHerbert Xu * This structure is used for the duration where packets are being 563436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 564436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 565436a0a40SHerbert Xu */ 566436a0a40SHerbert Xu struct xfrm_skb_cb { 567436a0a40SHerbert Xu union { 568436a0a40SHerbert Xu struct inet_skb_parm h4; 569436a0a40SHerbert Xu struct inet6_skb_parm h6; 570436a0a40SHerbert Xu } header; 571436a0a40SHerbert Xu 572436a0a40SHerbert Xu /* Sequence number for replay protection. */ 573b318e0e4SHerbert Xu union { 574b318e0e4SHerbert Xu u64 output; 575b318e0e4SHerbert Xu __be32 input; 576b318e0e4SHerbert Xu } seq; 577436a0a40SHerbert Xu }; 578436a0a40SHerbert Xu 579436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 580436a0a40SHerbert Xu 58136cf9acfSHerbert Xu /* 58236cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 58336cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 58436cf9acfSHerbert Xu */ 58536cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 58636cf9acfSHerbert Xu union { 58736cf9acfSHerbert Xu struct inet_skb_parm h4; 58836cf9acfSHerbert Xu struct inet6_skb_parm h6; 58936cf9acfSHerbert Xu } header; 59036cf9acfSHerbert Xu 59136cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 59236cf9acfSHerbert Xu __be16 id; 59336cf9acfSHerbert Xu __be16 frag_off; 59436cf9acfSHerbert Xu 595732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 596732c8bd5SHerbert Xu u8 ihl; 597732c8bd5SHerbert Xu 59836cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 59936cf9acfSHerbert Xu u8 tos; 60036cf9acfSHerbert Xu 60136cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 60236cf9acfSHerbert Xu u8 ttl; 60336cf9acfSHerbert Xu 60436cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 60536cf9acfSHerbert Xu u8 protocol; 60636cf9acfSHerbert Xu 607732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 608732c8bd5SHerbert Xu u8 optlen; 609732c8bd5SHerbert Xu 61036cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 61136cf9acfSHerbert Xu u8 flow_lbl[3]; 61236cf9acfSHerbert Xu }; 61336cf9acfSHerbert Xu 61436cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 61536cf9acfSHerbert Xu 616716062fdSHerbert Xu /* 617716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 618716062fdSHerbert Xu * related information. 619716062fdSHerbert Xu */ 620716062fdSHerbert Xu struct xfrm_spi_skb_cb { 621716062fdSHerbert Xu union { 622716062fdSHerbert Xu struct inet_skb_parm h4; 623716062fdSHerbert Xu struct inet6_skb_parm h6; 624716062fdSHerbert Xu } header; 625716062fdSHerbert Xu 626716062fdSHerbert Xu unsigned int daddroff; 6272fcb45b6SHerbert Xu unsigned int family; 628716062fdSHerbert Xu }; 629716062fdSHerbert Xu 630716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 631716062fdSHerbert Xu 632161a09e7SJoy Latten /* Audit Information */ 633161a09e7SJoy Latten struct xfrm_audit 634161a09e7SJoy Latten { 635161a09e7SJoy Latten u32 secid; 6362532386fSEric Paris uid_t loginuid; 6372532386fSEric Paris u32 sessionid; 638161a09e7SJoy Latten }; 639c9204d9cSJoy Latten 640c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 641afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 642ab5f5e8bSJoy Latten { 643ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 644ab5f5e8bSJoy Latten 645afeb14b4SPaul Moore if (audit_enabled == 0) 646afeb14b4SPaul Moore return NULL; 647ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 648ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 649ab5f5e8bSJoy Latten if (audit_buf == NULL) 650ab5f5e8bSJoy Latten return NULL; 651afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 652afeb14b4SPaul Moore return audit_buf; 653afeb14b4SPaul Moore } 654afeb14b4SPaul Moore 6552532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 656afeb14b4SPaul Moore struct audit_buffer *audit_buf) 657afeb14b4SPaul Moore { 658afeb14b4SPaul Moore char *secctx; 659afeb14b4SPaul Moore u32 secctx_len; 660ab5f5e8bSJoy Latten 6612532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 66268277accSPaul Moore if (secid != 0 && 66368277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 664ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 665ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 666ab5f5e8bSJoy Latten } else 667ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 668ab5f5e8bSJoy Latten } 669ab5f5e8bSJoy Latten 670ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6712532386fSEric Paris u32 auid, u32 ses, u32 secid); 672ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6732532386fSEric Paris u32 auid, u32 ses, u32 secid); 674ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6752532386fSEric Paris u32 auid, u32 ses, u32 secid); 676ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6772532386fSEric Paris u32 auid, u32 ses, u32 secid); 678afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 679afeb14b4SPaul Moore struct sk_buff *skb); 680afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 681afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 682afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 683afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 684afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 685c9204d9cSJoy Latten #else 68641fef0eeSMarcin Slusarz 68741fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 68841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 68941fef0eeSMarcin Slusarz { 69041fef0eeSMarcin Slusarz } 69141fef0eeSMarcin Slusarz 69241fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 69341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69441fef0eeSMarcin Slusarz { 69541fef0eeSMarcin Slusarz } 69641fef0eeSMarcin Slusarz 69741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 69841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69941fef0eeSMarcin Slusarz { 70041fef0eeSMarcin Slusarz } 70141fef0eeSMarcin Slusarz 70241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 70341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70441fef0eeSMarcin Slusarz { 70541fef0eeSMarcin Slusarz } 70641fef0eeSMarcin Slusarz 70741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 70841fef0eeSMarcin Slusarz struct sk_buff *skb) 70941fef0eeSMarcin Slusarz { 71041fef0eeSMarcin Slusarz } 71141fef0eeSMarcin Slusarz 71241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 71341fef0eeSMarcin Slusarz u16 family) 71441fef0eeSMarcin Slusarz { 71541fef0eeSMarcin Slusarz } 71641fef0eeSMarcin Slusarz 71741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 71841fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 71941fef0eeSMarcin Slusarz { 72041fef0eeSMarcin Slusarz } 72141fef0eeSMarcin Slusarz 72241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 72341fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 72441fef0eeSMarcin Slusarz { 72541fef0eeSMarcin Slusarz } 726c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 727161a09e7SJoy Latten 7281da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7291da177e4SLinus Torvalds { 7301da177e4SLinus Torvalds if (likely(policy != NULL)) 7311da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7321da177e4SLinus Torvalds } 7331da177e4SLinus Torvalds 73464c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7371da177e4SLinus Torvalds { 7381da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 73964c31b3fSWANG Cong xfrm_policy_destroy(policy); 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 7424e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 7434e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7444e81bb83SMasahide NAKAMURA { 7454e81bb83SMasahide NAKAMURA int i; 7464e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7474e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7484e81bb83SMasahide NAKAMURA } 7494e81bb83SMasahide NAKAMURA #else 7504e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7514e81bb83SMasahide NAKAMURA { 7524e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 7534e81bb83SMasahide NAKAMURA } 7544e81bb83SMasahide NAKAMURA #endif 7554e81bb83SMasahide NAKAMURA 7561da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7571da177e4SLinus Torvalds 75821380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 75921380b81SHerbert Xu { 76021380b81SHerbert Xu atomic_dec(&x->refcnt); 76121380b81SHerbert Xu } 76221380b81SHerbert Xu 7631da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7641da177e4SLinus Torvalds { 7651da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7661da177e4SLinus Torvalds __xfrm_state_destroy(x); 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7701da177e4SLinus Torvalds { 7711da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 7751da177e4SLinus Torvalds { 7765f19343fSAl Viro __be32 *a1 = token1; 7775f19343fSAl Viro __be32 *a2 = token2; 7781da177e4SLinus Torvalds int pdw; 7791da177e4SLinus Torvalds int pbi; 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 7821da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds if (pdw) 7851da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7861da177e4SLinus Torvalds return 0; 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds if (pbi) { 7895f19343fSAl Viro __be32 mask; 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7941da177e4SLinus Torvalds return 0; 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds return 1; 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds static __inline__ 801f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 8021da177e4SLinus Torvalds { 803f9d07e41SAl Viro __be16 port; 8041da177e4SLinus Torvalds switch(fl->proto) { 8051da177e4SLinus Torvalds case IPPROTO_TCP: 8061da177e4SLinus Torvalds case IPPROTO_UDP: 807ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8081da177e4SLinus Torvalds case IPPROTO_SCTP: 8091da177e4SLinus Torvalds port = fl->fl_ip_sport; 8101da177e4SLinus Torvalds break; 8111da177e4SLinus Torvalds case IPPROTO_ICMP: 8121da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8131da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 8141da177e4SLinus Torvalds break; 8152ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8162ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 8172ce4272aSMasahide NAKAMURA break; 8181da177e4SLinus Torvalds default: 8191da177e4SLinus Torvalds port = 0; /*XXX*/ 8201da177e4SLinus Torvalds } 8211da177e4SLinus Torvalds return port; 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds static __inline__ 825f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 8261da177e4SLinus Torvalds { 827f9d07e41SAl Viro __be16 port; 8281da177e4SLinus Torvalds switch(fl->proto) { 8291da177e4SLinus Torvalds case IPPROTO_TCP: 8301da177e4SLinus Torvalds case IPPROTO_UDP: 831ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8321da177e4SLinus Torvalds case IPPROTO_SCTP: 8331da177e4SLinus Torvalds port = fl->fl_ip_dport; 8341da177e4SLinus Torvalds break; 8351da177e4SLinus Torvalds case IPPROTO_ICMP: 8361da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8371da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 8381da177e4SLinus Torvalds break; 8391da177e4SLinus Torvalds default: 8401da177e4SLinus Torvalds port = 0; /*XXX*/ 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds return port; 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 84577681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 84677681021SAndrew Morton unsigned short family); 8471da177e4SLinus Torvalds 848df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 849df71837dSTrent Jaeger /* If neither has a context --> match 850df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 851df71837dSTrent Jaeger */ 852df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 853df71837dSTrent Jaeger { 854df71837dSTrent Jaeger return ((!s1 && !s2) || 855df71837dSTrent Jaeger (s1 && s2 && 856df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 857df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 858df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 859df71837dSTrent Jaeger } 860df71837dSTrent Jaeger #else 861df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 862df71837dSTrent Jaeger { 863df71837dSTrent Jaeger return 1; 864df71837dSTrent Jaeger } 865df71837dSTrent Jaeger #endif 866df71837dSTrent Jaeger 8671da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8681da177e4SLinus Torvalds * 8691da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8701da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8711da177e4SLinus Torvalds * 8721da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8731da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8741da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8751da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8761da177e4SLinus Torvalds * policy rule. 8771da177e4SLinus Torvalds */ 8781da177e4SLinus Torvalds struct xfrm_dst 8791da177e4SLinus Torvalds { 8801da177e4SLinus Torvalds union { 8811da177e4SLinus Torvalds struct dst_entry dst; 8821da177e4SLinus Torvalds struct rtable rt; 8831da177e4SLinus Torvalds struct rt6_info rt6; 8841da177e4SLinus Torvalds } u; 8851da177e4SLinus Torvalds struct dst_entry *route; 886157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 887157bfc25SMasahide NAKAMURA struct flowi *origin; 888157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 889157bfc25SMasahide NAKAMURA #endif 8909d4a706dSDavid S. Miller u32 genid; 8911da177e4SLinus Torvalds u32 route_mtu_cached; 8921da177e4SLinus Torvalds u32 child_mtu_cached; 89392d63decSHideaki YOSHIFUJI u32 route_cookie; 89492d63decSHideaki YOSHIFUJI u32 path_cookie; 8951da177e4SLinus Torvalds }; 8961da177e4SLinus Torvalds 897def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 898aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 899aabc9761SHerbert Xu { 900aabc9761SHerbert Xu dst_release(xdst->route); 901aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 902aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 903157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 904157bfc25SMasahide NAKAMURA kfree(xdst->origin); 905157bfc25SMasahide NAKAMURA xdst->origin = NULL; 906157bfc25SMasahide NAKAMURA kfree(xdst->partner); 907157bfc25SMasahide NAKAMURA xdst->partner = NULL; 908157bfc25SMasahide NAKAMURA #endif 909aabc9761SHerbert Xu } 910def8b4faSAlexey Dobriyan #endif 911aabc9761SHerbert Xu 912aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 913aabc9761SHerbert Xu 9141da177e4SLinus Torvalds struct sec_path 9151da177e4SLinus Torvalds { 9161da177e4SLinus Torvalds atomic_t refcnt; 9171da177e4SLinus Torvalds int len; 918dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9191da177e4SLinus Torvalds }; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds static inline struct sec_path * 9221da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9231da177e4SLinus Torvalds { 9241da177e4SLinus Torvalds if (sp) 9251da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9261da177e4SLinus Torvalds return sp; 9271da177e4SLinus Torvalds } 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds static inline void 9321da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9331da177e4SLinus Torvalds { 9341da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9351da177e4SLinus Torvalds __secpath_destroy(sp); 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds static inline void 9411da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9421da177e4SLinus Torvalds { 9431da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9441da177e4SLinus Torvalds secpath_put(skb->sp); 9451da177e4SLinus Torvalds skb->sp = NULL; 9461da177e4SLinus Torvalds #endif 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds static inline int 950a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 951a1e59abfSPatrick McHardy { 952a1e59abfSPatrick McHardy switch (family) { 953a1e59abfSPatrick McHardy case AF_INET: 954a1e59abfSPatrick McHardy return addr->a4 == 0; 955a1e59abfSPatrick McHardy case AF_INET6: 956a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 957a1e59abfSPatrick McHardy } 958a1e59abfSPatrick McHardy return 0; 959a1e59abfSPatrick McHardy } 960a1e59abfSPatrick McHardy 961a1e59abfSPatrick McHardy static inline int 9621da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9631da177e4SLinus Torvalds { 9641da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9651da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds static inline int 9691da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9701da177e4SLinus Torvalds { 9711da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9721da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9731da177e4SLinus Torvalds } 9741da177e4SLinus Torvalds 9751da177e4SLinus Torvalds static inline int 9761da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 9771da177e4SLinus Torvalds { 9781da177e4SLinus Torvalds switch (family) { 9791da177e4SLinus Torvalds case AF_INET: 9801da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9811da177e4SLinus Torvalds case AF_INET6: 9821da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds return !0; 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9881da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 9891da177e4SLinus Torvalds 990d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 991d5422efeSHerbert Xu struct sk_buff *skb, 992d5422efeSHerbert Xu unsigned int family, int reverse) 9931da177e4SLinus Torvalds { 994f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 995d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 996d5422efeSHerbert Xu 9971da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 998d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 9991da177e4SLinus Torvalds 1000f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 10011da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 1002d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1003d5422efeSHerbert Xu } 1004d5422efeSHerbert Xu 1005d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1006d5422efeSHerbert Xu { 1007d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10111da177e4SLinus Torvalds { 10121da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10161da177e4SLinus Torvalds { 10171da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10181da177e4SLinus Torvalds } 10191da177e4SLinus Torvalds 1020d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1021d5422efeSHerbert Xu struct sk_buff *skb) 1022d5422efeSHerbert Xu { 1023d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1024d5422efeSHerbert Xu } 1025d5422efeSHerbert Xu 1026d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1027d5422efeSHerbert Xu struct sk_buff *skb) 1028d5422efeSHerbert Xu { 1029d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1030d5422efeSHerbert Xu } 1031d5422efeSHerbert Xu 1032d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1033d5422efeSHerbert Xu unsigned int family, int reverse); 1034d5422efeSHerbert Xu 1035d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1036d5422efeSHerbert Xu unsigned int family) 1037d5422efeSHerbert Xu { 1038d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1039d5422efeSHerbert Xu } 1040d5422efeSHerbert Xu 1041d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1042d5422efeSHerbert Xu struct flowi *fl, 1043d5422efeSHerbert Xu unsigned int family) 1044d5422efeSHerbert Xu { 1045d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1046d5422efeSHerbert Xu } 1047d5422efeSHerbert Xu 10481da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10511da177e4SLinus Torvalds { 105299a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 105399a66657SAlexey Dobriyan 105499a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 10551da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 10561da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10651da177e4SLinus Torvalds { 10661da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10741da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10751da177e4SLinus Torvalds return 0; 10761da177e4SLinus Torvalds } 10771da177e4SLinus Torvalds 10784666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10811da177e4SLinus Torvalds { 10821da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10831da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10841da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10871da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 10881da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds #else 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 10951da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 10961da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 10971da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 10981da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds return 1; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11031da177e4SLinus Torvalds { 11041da177e4SLinus Torvalds return 1; 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds return 1; 11091da177e4SLinus Torvalds } 1110d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1111d5422efeSHerbert Xu struct flowi *fl, 1112d5422efeSHerbert Xu unsigned int family) 1113d5422efeSHerbert Xu { 1114d5422efeSHerbert Xu return -ENOSYS; 1115d5422efeSHerbert Xu } 1116d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1117d5422efeSHerbert Xu struct sk_buff *skb) 1118d5422efeSHerbert Xu { 1119d5422efeSHerbert Xu return 1; 1120d5422efeSHerbert Xu } 1121d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1122d5422efeSHerbert Xu struct sk_buff *skb) 1123d5422efeSHerbert Xu { 1124d5422efeSHerbert Xu return 1; 1125d5422efeSHerbert Xu } 11261da177e4SLinus Torvalds #endif 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds static __inline__ 11291da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 11301da177e4SLinus Torvalds { 11311da177e4SLinus Torvalds switch (family){ 11321da177e4SLinus Torvalds case AF_INET: 11331da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11341da177e4SLinus Torvalds case AF_INET6: 11351da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds return NULL; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static __inline__ 11411da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds switch (family){ 11441da177e4SLinus Torvalds case AF_INET: 11451da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11461da177e4SLinus Torvalds case AF_INET6: 11471da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds return NULL; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11529bb182a7SYOSHIFUJI Hideaki static __inline__ 11539bb182a7SYOSHIFUJI Hideaki void xfrm_flowi_addr_get(struct flowi *fl, 11549bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11559bb182a7SYOSHIFUJI Hideaki unsigned short family) 11569bb182a7SYOSHIFUJI Hideaki { 11579bb182a7SYOSHIFUJI Hideaki switch(family) { 11589bb182a7SYOSHIFUJI Hideaki case AF_INET: 11599bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11609bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11619bb182a7SYOSHIFUJI Hideaki break; 11629bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11639bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11649bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11659bb182a7SYOSHIFUJI Hideaki break; 11669bb182a7SYOSHIFUJI Hideaki } 11679bb182a7SYOSHIFUJI Hideaki } 11689bb182a7SYOSHIFUJI Hideaki 11691da177e4SLinus Torvalds static __inline__ int 11701da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 11711da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11721da177e4SLinus Torvalds { 11731da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11741da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11751da177e4SLinus Torvalds return 1; 11761da177e4SLinus Torvalds return 0; 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds static __inline__ int 11801da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 11811da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11821da177e4SLinus Torvalds { 11831da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11841da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11851da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11861da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11871da177e4SLinus Torvalds return 1; 11881da177e4SLinus Torvalds return 0; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds static __inline__ int 11921da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 11931da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11941da177e4SLinus Torvalds unsigned short family) 11951da177e4SLinus Torvalds { 11961da177e4SLinus Torvalds switch (family) { 11971da177e4SLinus Torvalds case AF_INET: 11981da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 11991da177e4SLinus Torvalds case AF_INET6: 12001da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds return 0; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 1205e53820deSMasahide NAKAMURA static __inline__ int 1206e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1207e53820deSMasahide NAKAMURA unsigned short family) 1208e53820deSMasahide NAKAMURA { 1209e53820deSMasahide NAKAMURA switch (family) { 1210e53820deSMasahide NAKAMURA case AF_INET: 1211e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1212e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1213e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1214e53820deSMasahide NAKAMURA case AF_INET6: 1215e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1216e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1217e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1218e53820deSMasahide NAKAMURA } 1219e53820deSMasahide NAKAMURA return 0; 1220e53820deSMasahide NAKAMURA } 1221e53820deSMasahide NAKAMURA 12221da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 12231da177e4SLinus Torvalds { 12241da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12275794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12285794708fSMasahide NAKAMURA { 1229dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1230dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1231dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1232dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12335794708fSMasahide NAKAMURA } 12345794708fSMasahide NAKAMURA 12351da177e4SLinus Torvalds /* 12361da177e4SLinus Torvalds * xfrm algorithm information 12371da177e4SLinus Torvalds */ 12381a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12391a6509d9SHerbert Xu u16 icv_truncbits; 12401a6509d9SHerbert Xu }; 12411a6509d9SHerbert Xu 12421da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12431da177e4SLinus Torvalds u16 icv_truncbits; 12441da177e4SLinus Torvalds u16 icv_fullbits; 12451da177e4SLinus Torvalds }; 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12481da177e4SLinus Torvalds u16 blockbits; 12491da177e4SLinus Torvalds u16 defkeybits; 12501da177e4SLinus Torvalds }; 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12531da177e4SLinus Torvalds u16 threshold; 12541da177e4SLinus Torvalds }; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds struct xfrm_algo_desc { 12571da177e4SLinus Torvalds char *name; 125804ff1260SHerbert Xu char *compat; 12591da177e4SLinus Torvalds u8 available:1; 12601da177e4SLinus Torvalds union { 12611a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12621da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12631da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12641da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12651da177e4SLinus Torvalds } uinfo; 12661da177e4SLinus Torvalds struct sadb_alg desc; 12671da177e4SLinus Torvalds }; 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12701da177e4SLinus Torvalds struct xfrm_tunnel { 12711da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1272d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1273d2acc347SHerbert Xu 1274d2acc347SHerbert Xu struct xfrm_tunnel *next; 1275d2acc347SHerbert Xu int priority; 12761da177e4SLinus Torvalds }; 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds struct xfrm6_tunnel { 1279d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1280d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 128104ce6909SAl Viro int type, int code, int offset, __be32 info); 1282d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1283d2acc347SHerbert Xu int priority; 12841da177e4SLinus Torvalds }; 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds extern void xfrm_init(void); 12871da177e4SLinus Torvalds extern void xfrm4_init(void); 1288d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1289d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 12901da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1291c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1292c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1293c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12940013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12951da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1296c35b7e72SDaniel Lezcano #else 1297c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1298c35b7e72SDaniel Lezcano { 1299c35b7e72SDaniel Lezcano return 0; 1300c35b7e72SDaniel Lezcano } 1301c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1302c35b7e72SDaniel Lezcano { 1303c35b7e72SDaniel Lezcano ; 1304c35b7e72SDaniel Lezcano } 1305c35b7e72SDaniel Lezcano #endif 13061da177e4SLinus Torvalds 1307558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1308558f82efSMasahide NAKAMURA extern int xfrm_proc_init(void); 1309558f82efSMasahide NAKAMURA #endif 1310558f82efSMasahide NAKAMURA 13115c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1312284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13134c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1314abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1315673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 13161da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 13171da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 13181da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13191da177e4SLinus Torvalds unsigned short family); 13205447c5e4SAlexey Dobriyan extern struct xfrm_state * xfrm_stateonly_find(struct net *net, 13215447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1322628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1323628529b6SJamal Hadi Salim unsigned short family, 1324628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13251da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13261da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13271da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13281da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1329221df1edSAlexey Dobriyan extern struct xfrm_state *xfrm_state_lookup(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1330221df1edSAlexey Dobriyan extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 133141a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 133241a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 133341a49cc3SMasahide NAKAMURA int n, unsigned short family); 133441a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 133541a49cc3SMasahide NAKAMURA int n, unsigned short family); 133641a49cc3SMasahide NAKAMURA #else 133741a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 133841a49cc3SMasahide NAKAMURA int n, unsigned short family) 133941a49cc3SMasahide NAKAMURA { 134041a49cc3SMasahide NAKAMURA return -ENOSYS; 134141a49cc3SMasahide NAKAMURA } 134241a49cc3SMasahide NAKAMURA 134341a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 134441a49cc3SMasahide NAKAMURA int n, unsigned short family) 134541a49cc3SMasahide NAKAMURA { 134641a49cc3SMasahide NAKAMURA return -ENOSYS; 134741a49cc3SMasahide NAKAMURA } 134841a49cc3SMasahide NAKAMURA #endif 1349af11e316SJamal Hadi Salim 1350af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1351af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1352af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1353af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1354af11e316SJamal Hadi Salim }; 1355af11e316SJamal Hadi Salim 13565a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13575a6d3416SJamal Hadi Salim u32 incnt; 13585a6d3416SJamal Hadi Salim u32 outcnt; 13595a6d3416SJamal Hadi Salim u32 fwdcnt; 13605a6d3416SJamal Hadi Salim u32 inscnt; 13615a6d3416SJamal Hadi Salim u32 outscnt; 13625a6d3416SJamal Hadi Salim u32 fwdscnt; 13635a6d3416SJamal Hadi Salim u32 spdhcnt; 13645a6d3416SJamal Hadi Salim u32 spdhmcnt; 13655a6d3416SJamal Hadi Salim }; 13665a6d3416SJamal Hadi Salim 13675447c5e4SAlexey Dobriyan extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 seq); 136826b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 13690e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1370af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 13715a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1372afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1373afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 137461f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1375f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 13761da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 137772cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1378227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1379716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1380716062fdSHerbert Xu int encap_type); 13811bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1382c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1383406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1384df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 138536cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1386227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1387c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1388c4541b41SHerbert Xu int encap_type); 1389716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 13901da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1391c4541b41SHerbert Xu 1392c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1393c4541b41SHerbert Xu { 1394c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1395c4541b41SHerbert Xu } 1396c4541b41SHerbert Xu 139736cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 139836cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 13991da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1400c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1401c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 140236cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1403227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 140433b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1405716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1406e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1407fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1408fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 140973d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 141073d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 14118c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 14121da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 14138c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 141436cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 141536cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14161da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1417aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1418aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14191da177e4SLinus Torvalds 14201da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1421067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14221da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14231da177e4SLinus Torvalds #else 14241da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14251da177e4SLinus Torvalds { 14261da177e4SLinus Torvalds return -ENOPROTOOPT; 14271da177e4SLinus Torvalds } 14281da177e4SLinus Torvalds 1429067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14301da177e4SLinus Torvalds { 14311da177e4SLinus Torvalds /* should not happen */ 14321da177e4SLinus Torvalds kfree_skb(skb); 14331da177e4SLinus Torvalds return 0; 14341da177e4SLinus Torvalds } 14351da177e4SLinus Torvalds #endif 14361da177e4SLinus Torvalds 14370331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14384c563f76STimo Teras 143912a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1440cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14414c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 144212a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14431da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14448d1211a6SAlexey Dobriyan struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u8 type, int dir, 14454e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1446ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1447ef41aaa0SEric Paris int *err); 14488d1211a6SAlexey Dobriyan struct xfrm_policy *xfrm_policy_byid(struct net *net, u8, int dir, u32 id, int delete, int *err); 144933ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14501da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1451658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 14525447c5e4SAlexey Dobriyan struct xfrm_state * xfrm_find_acq(struct net *net, u8 mode, u32 reqid, u8 proto, 14531da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 14541da177e4SLinus Torvalds int create, unsigned short family); 14551da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14565b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 14575b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 14581da177e4SLinus Torvalds 145980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 146080c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 146113c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 146213c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 146380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 146480c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 146580c9abaaSShinta Sugimoto struct xfrm_migrate *m); 146680c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 146713c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 146813c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 146980c9abaaSShinta Sugimoto #endif 147080c9abaaSShinta Sugimoto 14715d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14726c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 147397a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14741da177e4SLinus Torvalds 14751da177e4SLinus Torvalds extern void xfrm_input_init(void); 14766067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14791da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 14801da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 14811da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 14821da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 14831da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 14841da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 14851da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 14861da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 14871da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 14881da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 14891a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 14901a6509d9SHerbert Xu int probe); 14911da177e4SLinus Torvalds 149207d4ee58SHerbert Xu struct hash_desc; 14939409f38aSHerbert Xu struct scatterlist; 149407d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 149507d4ee58SHerbert Xu unsigned int); 14961da177e4SLinus Torvalds 149707d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 14981da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 14991da177e4SLinus Torvalds 15001da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 15011da177e4SLinus Torvalds int family) 15021da177e4SLinus Torvalds { 15031da177e4SLinus Torvalds switch (family) { 15041da177e4SLinus Torvalds default: 15051da177e4SLinus Torvalds case AF_INET: 15068c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 15071da177e4SLinus Torvalds case AF_INET6: 15081da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15091da177e4SLinus Torvalds (struct in6_addr *)b); 15101da177e4SLinus Torvalds } 15111da177e4SLinus Torvalds } 15121da177e4SLinus Torvalds 151377d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 151477d8d7a6SHerbert Xu { 151577d8d7a6SHerbert Xu return index & 7; 151677d8d7a6SHerbert Xu } 151777d8d7a6SHerbert Xu 1518a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1519a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1520f8cd5488SJamal Hadi Salim { 1521be33690dSPatrick McHardy struct sock *nlsk; 1522be33690dSPatrick McHardy int ret = 0; 1523be33690dSPatrick McHardy 1524be33690dSPatrick McHardy rcu_read_lock(); 1525a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1526be33690dSPatrick McHardy if (nlsk) 1527be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1528be33690dSPatrick McHardy rcu_read_unlock(); 1529be33690dSPatrick McHardy return ret; 1530f8cd5488SJamal Hadi Salim } 1531a6483b79SAlexey Dobriyan #endif 1532f8cd5488SJamal Hadi Salim 15330f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 15340f99be0dSEric Dumazet { 15350f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15360f99be0dSEric Dumazet } 15370f99be0dSEric Dumazet 153880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 153980c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 154080c9abaaSShinta Sugimoto { 15410f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 154280c9abaaSShinta Sugimoto } 154380c9abaaSShinta Sugimoto 154480c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 154580c9abaaSShinta Sugimoto { 154680c9abaaSShinta Sugimoto int i; 154780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 154880c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 154980c9abaaSShinta Sugimoto } 155080c9abaaSShinta Sugimoto 155180c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 155280c9abaaSShinta Sugimoto { 155380c9abaaSShinta Sugimoto int i; 155480c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 155580c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 155680c9abaaSShinta Sugimoto } 155780c9abaaSShinta Sugimoto #endif 1558f8cd5488SJamal Hadi Salim 1559def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 156000501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 156100501121SHerbert Xu { 156200501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 156300501121SHerbert Xu } 1564def8b4faSAlexey Dobriyan #endif 156500501121SHerbert Xu 15661da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1567