11da177e4SLinus Torvalds #ifndef _NET_XFRM_H 21da177e4SLinus Torvalds #define _NET_XFRM_H 31da177e4SLinus Torvalds 4aabc9761SHerbert Xu #include <linux/compiler.h> 51da177e4SLinus Torvalds #include <linux/xfrm.h> 61da177e4SLinus Torvalds #include <linux/spinlock.h> 71da177e4SLinus Torvalds #include <linux/list.h> 81da177e4SLinus Torvalds #include <linux/skbuff.h> 914c85021SArnaldo Carvalho de Melo #include <linux/socket.h> 101da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 115794708fSMasahide NAKAMURA #include <linux/ipsec.h> 121da177e4SLinus Torvalds #include <linux/in6.h> 134a3e2f71SArjan van de Ven #include <linux/mutex.h> 14ab5f5e8bSJoy Latten #include <linux/audit.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <net/sock.h> 181da177e4SLinus Torvalds #include <net/dst.h> 19436a0a40SHerbert Xu #include <net/ip.h> 201da177e4SLinus Torvalds #include <net/route.h> 211da177e4SLinus Torvalds #include <net/ipv6.h> 221da177e4SLinus Torvalds #include <net/ip6_fib.h> 23fe1a5f03STimo Teräs #include <net/flow.h> 249e0d57fdSYury Polyanskiy 259e0d57fdSYury Polyanskiy #include <linux/interrupt.h> 269e0d57fdSYury Polyanskiy 27558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 28558f82efSMasahide NAKAMURA #include <net/snmp.h> 29558f82efSMasahide NAKAMURA #endif 301da177e4SLinus Torvalds 31d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 32d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 33d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 34d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 35d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 36d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 37d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 38d3d6dd3aSMasahide NAKAMURA 39fa9921e4SNicolas Dichtel #define XFRM_ALIGN4(len) (((len) + 3) & ~3) 401da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 41b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 42b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 43d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 44d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 451da177e4SLinus Torvalds 46558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 4759c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) 4859c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) 4959c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) 50558f82efSMasahide NAKAMURA #else 5159c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) ((void)(net)) 5259c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) ((void)(net)) 5359c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) ((void)(net)) 54558f82efSMasahide NAKAMURA #endif 55558f82efSMasahide NAKAMURA 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. */ 130fd2c3ef7SEric Dumazet struct xfrm_state { 131673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 132673c09beSAlexey Dobriyan struct net *xs_net; 133673c09beSAlexey Dobriyan #endif 134abb81c4fSHerbert Xu union { 13512a169e7SHerbert Xu struct hlist_node gclist; 1368f126e37SDavid S. Miller struct hlist_node bydst; 137abb81c4fSHerbert Xu }; 1388f126e37SDavid S. Miller struct hlist_node bysrc; 1398f126e37SDavid S. Miller struct hlist_node byspi; 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds atomic_t refcnt; 1421da177e4SLinus Torvalds spinlock_t lock; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds struct xfrm_id id; 1451da177e4SLinus Torvalds struct xfrm_selector sel; 146bf825f81SJamal Hadi Salim struct xfrm_mark mark; 14735d2856bSMartin Willi u32 tfcpad; 1481da177e4SLinus Torvalds 1499d4a706dSDavid S. Miller u32 genid; 1509d4a706dSDavid S. Miller 15112a169e7SHerbert Xu /* Key manager bits */ 15212a169e7SHerbert Xu struct xfrm_state_walk km; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds /* Parameters of this state. */ 1551da177e4SLinus Torvalds struct { 1561da177e4SLinus Torvalds u32 reqid; 1571da177e4SLinus Torvalds u8 mode; 1581da177e4SLinus Torvalds u8 replay_window; 1591da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1601da177e4SLinus Torvalds u8 flags; 1611da177e4SLinus Torvalds u16 family; 1621da177e4SLinus Torvalds xfrm_address_t saddr; 1631da177e4SLinus Torvalds int header_len; 1641da177e4SLinus Torvalds int trailer_len; 1651da177e4SLinus Torvalds } props; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* Data for transformer */ 1704447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1711da177e4SLinus Torvalds struct xfrm_algo *ealg; 1721da177e4SLinus Torvalds struct xfrm_algo *calg; 1731a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds /* Data for encapsulator */ 1761da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1771da177e4SLinus Torvalds 178060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 179060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 180060f02a3SNoriaki TAKAMIYA 1811da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1821da177e4SLinus Torvalds struct xfrm_state *tunnel; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1851da177e4SLinus Torvalds atomic_t tunnel_users; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds /* State for replay detection */ 1881da177e4SLinus Torvalds struct xfrm_replay_state replay; 1899736acf3SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 1901da177e4SLinus Torvalds 191f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 192f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 1939736acf3SSteffen Klassert struct xfrm_replay_state_esn *preplay_esn; 194f8cd5488SJamal Hadi Salim 1952717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1962717096aSJamal Hadi Salim * moment 1972717096aSJamal Hadi Salim */ 1982717096aSJamal Hadi Salim u32 xflags; 1992717096aSJamal Hadi Salim 200f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 201f8cd5488SJamal Hadi Salim u32 replay_maxage; 202f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 203f8cd5488SJamal Hadi Salim 204f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 205f8cd5488SJamal Hadi Salim struct timer_list rtimer; 206f8cd5488SJamal Hadi Salim 2071da177e4SLinus Torvalds /* Statistics */ 2081da177e4SLinus Torvalds struct xfrm_stats stats; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2119e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2121da177e4SLinus Torvalds 2139afaca05SMasahide NAKAMURA /* Last used time */ 214d26f3984SHerbert Xu unsigned long lastused; 2159afaca05SMasahide NAKAMURA 2161da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2171da177e4SLinus Torvalds * transformer. */ 218533cb5b0SEric Dumazet const struct xfrm_type *type; 21913996378SHerbert Xu struct xfrm_mode *inner_mode; 220df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 22113996378SHerbert Xu struct xfrm_mode *outer_mode; 2221da177e4SLinus Torvalds 223df71837dSTrent Jaeger /* Security context */ 224df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 225df71837dSTrent Jaeger 2261da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2271da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2281da177e4SLinus Torvalds void *data; 2291da177e4SLinus Torvalds }; 2301da177e4SLinus Torvalds 231673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 232673c09beSAlexey Dobriyan { 233673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 234673c09beSAlexey Dobriyan } 235673c09beSAlexey Dobriyan 2362717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2372717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2382717096aSJamal Hadi Salim 2391da177e4SLinus Torvalds enum { 2401da177e4SLinus Torvalds XFRM_STATE_VOID, 2411da177e4SLinus Torvalds XFRM_STATE_ACQ, 2421da177e4SLinus Torvalds XFRM_STATE_VALID, 2431da177e4SLinus Torvalds XFRM_STATE_ERROR, 2441da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2451da177e4SLinus Torvalds XFRM_STATE_DEAD 2461da177e4SLinus Torvalds }; 2471da177e4SLinus Torvalds 24826b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 249fd2c3ef7SEric Dumazet struct km_event { 250bf08867fSHerbert Xu union { 251bf08867fSHerbert Xu u32 hard; 252bf08867fSHerbert Xu u32 proto; 253bf08867fSHerbert Xu u32 byid; 254f8cd5488SJamal Hadi Salim u32 aevent; 255f7b6983fSMasahide NAKAMURA u32 type; 256bf08867fSHerbert Xu } data; 257bf08867fSHerbert Xu 25826b15dadSJamal Hadi Salim u32 seq; 25926b15dadSJamal Hadi Salim u32 pid; 26026b15dadSJamal Hadi Salim u32 event; 2617067802eSAlexey Dobriyan struct net *net; 26226b15dadSJamal Hadi Salim }; 26326b15dadSJamal Hadi Salim 26425ee3286SHerbert Xu struct net_device; 2651da177e4SLinus Torvalds struct xfrm_type; 2661da177e4SLinus Torvalds struct xfrm_dst; 2671da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2681da177e4SLinus Torvalds unsigned short family; 2691da177e4SLinus Torvalds struct dst_ops *dst_ops; 270ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 271c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 2725e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2735e6b930fSDavid S. Miller const xfrm_address_t *daddr); 274fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2751da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 276d5422efeSHerbert Xu struct flowi *fl, 277d5422efeSHerbert Xu int reverse); 27805d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 279a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 280a1b05140SMasahide NAKAMURA struct dst_entry *dst, 281a1b05140SMasahide NAKAMURA int nfheader_len); 28225ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 28387c1e12bSHerbert Xu struct net_device *dev, 2840c7b3eefSDavid S. Miller const struct flowi *fl); 2852774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 2861da177e4SLinus Torvalds }; 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2891da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 290214e005bSDavid S. Miller extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); 291214e005bSDavid S. Miller extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds struct xfrm_tmpl; 294980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29553bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29653bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29753bc6b4dSJamal Hadi Salim 2981da177e4SLinus Torvalds struct xfrm_state_afinfo { 29917c2a42aSHerbert Xu unsigned int family; 30036cf9acfSHerbert Xu unsigned int proto; 3018e3d716cSAl Viro __be16 eth_proto; 30217c2a42aSHerbert Xu struct module *owner; 303533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 304aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 305d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 30673e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 30773e5ebb2SDavid S. Miller const struct flowi *fl); 30819bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 30919bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 31019bd6244SDavid S. Miller const xfrm_address_t *daddr, 31119bd6244SDavid S. Miller const xfrm_address_t *saddr); 31241a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 31341a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 314cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 315227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 316227620e2SHerbert Xu struct sk_buff *skb); 31736cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31836cf9acfSHerbert Xu struct sk_buff *skb); 319716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 320716062fdSHerbert Xu int async); 3211da177e4SLinus Torvalds }; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3241da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3271da177e4SLinus Torvalds 328fd2c3ef7SEric Dumazet struct xfrm_type { 3291da177e4SLinus Torvalds char *description; 3301da177e4SLinus Torvalds struct module *owner; 331a6337463Sjamal u8 proto; 332a6337463Sjamal u8 flags; 3331b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 334436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 335f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 336f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3371da177e4SLinus Torvalds 33872cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3391da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 340e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3411da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3428f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3438f029de2SDavid S. Miller const struct flowi *); 344aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3451da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 346c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3471da177e4SLinus Torvalds }; 3481da177e4SLinus Torvalds 349533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 350533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3511da177e4SLinus Torvalds 352b59f45d0SHerbert Xu struct xfrm_mode { 353227620e2SHerbert Xu /* 354227620e2SHerbert Xu * Remove encapsulation header. 355227620e2SHerbert Xu * 356227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 357227620e2SHerbert Xu * header. 358227620e2SHerbert Xu * 359227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 360227620e2SHerbert Xu * should be and the network header shall be set to where the IP 361227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 362227620e2SHerbert Xu * payload. 363227620e2SHerbert Xu */ 364227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 365227620e2SHerbert Xu 366227620e2SHerbert Xu /* 367227620e2SHerbert Xu * This is the actual input entry point. 368227620e2SHerbert Xu * 369227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 370227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 371227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 372227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 373227620e2SHerbert Xu */ 374b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 37537fedd3aSHerbert Xu 37637fedd3aSHerbert Xu /* 37737fedd3aSHerbert Xu * Add encapsulation header. 37837fedd3aSHerbert Xu * 37937fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 38037fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 38137fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 38237fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 38337fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 38437fedd3aSHerbert Xu * header. The value of the network header will always point 38537fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 38637fedd3aSHerbert Xu */ 38736cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38836cf9acfSHerbert Xu 38936cf9acfSHerbert Xu /* 39036cf9acfSHerbert Xu * This is the actual output entry point. 39136cf9acfSHerbert Xu * 39236cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 39336cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 39436cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 39536cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 39636cf9acfSHerbert Xu * call output2. 39736cf9acfSHerbert Xu */ 398eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 399b59f45d0SHerbert Xu 40017c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 401b59f45d0SHerbert Xu struct module *owner; 402b59f45d0SHerbert Xu unsigned int encap; 4031bfcb10fSHerbert Xu int flags; 4041bfcb10fSHerbert Xu }; 4051bfcb10fSHerbert Xu 4061bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4071bfcb10fSHerbert Xu enum { 4081bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 409b59f45d0SHerbert Xu }; 410b59f45d0SHerbert Xu 411b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 412b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 413b59f45d0SHerbert Xu 414df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 415df9dcb45SKazunori MIYAZAWA { 416df9dcb45SKazunori MIYAZAWA switch(family) { 417df9dcb45SKazunori MIYAZAWA case AF_INET: 418df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 419df9dcb45SKazunori MIYAZAWA case AF_INET6: 420df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 421df9dcb45SKazunori MIYAZAWA default: 422df9dcb45SKazunori MIYAZAWA return 0; 423df9dcb45SKazunori MIYAZAWA } 424df9dcb45SKazunori MIYAZAWA } 425df9dcb45SKazunori MIYAZAWA 426df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 427df9dcb45SKazunori MIYAZAWA { 428df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 429df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 430df9dcb45SKazunori MIYAZAWA return x->inner_mode; 431df9dcb45SKazunori MIYAZAWA else 432df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 433df9dcb45SKazunori MIYAZAWA } 434df9dcb45SKazunori MIYAZAWA 435fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4361da177e4SLinus Torvalds /* id in template is interpreted as: 4371da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4381da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4391da177e4SLinus Torvalds * daddr must be fixed too. 4401da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4411da177e4SLinus Torvalds */ 4421da177e4SLinus Torvalds struct xfrm_id id; 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4451da177e4SLinus Torvalds xfrm_address_t saddr; 4461da177e4SLinus Torvalds 44776b3f055SMiika Komu unsigned short encap_family; 44876b3f055SMiika Komu 449a6337463Sjamal u32 reqid; 4501da177e4SLinus Torvalds 4517e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 452a6337463Sjamal u8 mode; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 455a6337463Sjamal u8 share; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 458a6337463Sjamal u8 optional; 4591da177e4SLinus Torvalds 460c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 461a6337463Sjamal u8 allalgs; 462c5d18e98SHerbert Xu 4631da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 464a6337463Sjamal u32 aalgos; 465a6337463Sjamal u32 ealgos; 466a6337463Sjamal u32 calgos; 4671da177e4SLinus Torvalds }; 4681da177e4SLinus Torvalds 469622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4701da177e4SLinus Torvalds 47112a169e7SHerbert Xu struct xfrm_policy_walk_entry { 47212a169e7SHerbert Xu struct list_head all; 47312a169e7SHerbert Xu u8 dead; 47412a169e7SHerbert Xu }; 47512a169e7SHerbert Xu 47612a169e7SHerbert Xu struct xfrm_policy_walk { 47712a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47812a169e7SHerbert Xu u8 type; 47912a169e7SHerbert Xu u32 seq; 48012a169e7SHerbert Xu }; 48112a169e7SHerbert Xu 482fd2c3ef7SEric Dumazet struct xfrm_policy { 4830331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4840331b1f3SAlexey Dobriyan struct net *xp_net; 4850331b1f3SAlexey Dobriyan #endif 4862518c7c2SDavid S. Miller struct hlist_node bydst; 4872518c7c2SDavid S. Miller struct hlist_node byidx; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4901da177e4SLinus Torvalds rwlock_t lock; 4911da177e4SLinus Torvalds atomic_t refcnt; 4921da177e4SLinus Torvalds struct timer_list timer; 4931da177e4SLinus Torvalds 494fe1a5f03STimo Teräs struct flow_cache_object flo; 49580c802f3STimo Teräs atomic_t genid; 4961da177e4SLinus Torvalds u32 priority; 4971da177e4SLinus Torvalds u32 index; 498bf825f81SJamal Hadi Salim struct xfrm_mark mark; 4991da177e4SLinus Torvalds struct xfrm_selector selector; 5001da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5011da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 50212a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 50346ca5f5dSArnaldo Carvalho de Melo u8 type; 50446ca5f5dSArnaldo Carvalho de Melo u8 action; 50546ca5f5dSArnaldo Carvalho de Melo u8 flags; 50646ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 50712a169e7SHerbert Xu u16 family; 508df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5091da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5101da177e4SLinus Torvalds }; 5111da177e4SLinus Torvalds 51263eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5130331b1f3SAlexey Dobriyan { 5140331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5150331b1f3SAlexey Dobriyan } 5160331b1f3SAlexey Dobriyan 51713c1d189SArnaud Ebalard struct xfrm_kmaddress { 51813c1d189SArnaud Ebalard xfrm_address_t local; 51913c1d189SArnaud Ebalard xfrm_address_t remote; 52013c1d189SArnaud Ebalard u32 reserved; 52113c1d189SArnaud Ebalard u16 family; 52213c1d189SArnaud Ebalard }; 52313c1d189SArnaud Ebalard 52480c9abaaSShinta Sugimoto struct xfrm_migrate { 52580c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 52680c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 52780c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52880c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52980c9abaaSShinta Sugimoto u8 proto; 53080c9abaaSShinta Sugimoto u8 mode; 53180c9abaaSShinta Sugimoto u16 reserved; 53280c9abaaSShinta Sugimoto u32 reqid; 53380c9abaaSShinta Sugimoto u16 old_family; 53480c9abaaSShinta Sugimoto u16 new_family; 53580c9abaaSShinta Sugimoto }; 53680c9abaaSShinta Sugimoto 5371da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 538f8cd5488SJamal Hadi Salim /* which seqno */ 539f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 540f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 541f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 542f8cd5488SJamal Hadi Salim /* what happened */ 543f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 544f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 545f8cd5488SJamal Hadi Salim 546f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 547f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 548f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 549f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 550f8cd5488SJamal Hadi Salim /* default seq threshold size */ 551f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5521da177e4SLinus Torvalds 553fd2c3ef7SEric Dumazet struct xfrm_mgr { 5541da177e4SLinus Torvalds struct list_head list; 5551da177e4SLinus Torvalds char *id; 556214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 5571da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 558cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5595d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 560214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 561db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 562183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 563183cad12SDavid S. Miller u8 dir, u8 type, 564183cad12SDavid S. Miller const struct xfrm_migrate *m, 565183cad12SDavid S. Miller int num_bundles, 566183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 5671da177e4SLinus Torvalds }; 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5701da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5711da177e4SLinus Torvalds 572436a0a40SHerbert Xu /* 573436a0a40SHerbert Xu * This structure is used for the duration where packets are being 574436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 575436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 576436a0a40SHerbert Xu */ 577436a0a40SHerbert Xu struct xfrm_skb_cb { 578436a0a40SHerbert Xu union { 579436a0a40SHerbert Xu struct inet_skb_parm h4; 580436a0a40SHerbert Xu struct inet6_skb_parm h6; 581436a0a40SHerbert Xu } header; 582436a0a40SHerbert Xu 583436a0a40SHerbert Xu /* Sequence number for replay protection. */ 584b318e0e4SHerbert Xu union { 5851ce3644aSSteffen Klassert struct { 5861ce3644aSSteffen Klassert __u32 low; 5871ce3644aSSteffen Klassert __u32 hi; 5881ce3644aSSteffen Klassert } output; 5891ce3644aSSteffen Klassert struct { 5901ce3644aSSteffen Klassert __be32 low; 5911ce3644aSSteffen Klassert __be32 hi; 5921ce3644aSSteffen Klassert } input; 593b318e0e4SHerbert Xu } seq; 594436a0a40SHerbert Xu }; 595436a0a40SHerbert Xu 596436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 597436a0a40SHerbert Xu 59836cf9acfSHerbert Xu /* 59936cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 60036cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 60136cf9acfSHerbert Xu */ 60236cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 60336cf9acfSHerbert Xu union { 60436cf9acfSHerbert Xu struct inet_skb_parm h4; 60536cf9acfSHerbert Xu struct inet6_skb_parm h6; 60636cf9acfSHerbert Xu } header; 60736cf9acfSHerbert Xu 60836cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 60936cf9acfSHerbert Xu __be16 id; 61036cf9acfSHerbert Xu __be16 frag_off; 61136cf9acfSHerbert Xu 612732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 613732c8bd5SHerbert Xu u8 ihl; 614732c8bd5SHerbert Xu 61536cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 61636cf9acfSHerbert Xu u8 tos; 61736cf9acfSHerbert Xu 61836cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 61936cf9acfSHerbert Xu u8 ttl; 62036cf9acfSHerbert Xu 62136cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 62236cf9acfSHerbert Xu u8 protocol; 62336cf9acfSHerbert Xu 624732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 625732c8bd5SHerbert Xu u8 optlen; 626732c8bd5SHerbert Xu 62736cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 62836cf9acfSHerbert Xu u8 flow_lbl[3]; 62936cf9acfSHerbert Xu }; 63036cf9acfSHerbert Xu 63136cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 63236cf9acfSHerbert Xu 633716062fdSHerbert Xu /* 634716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 635716062fdSHerbert Xu * related information. 636716062fdSHerbert Xu */ 637716062fdSHerbert Xu struct xfrm_spi_skb_cb { 638716062fdSHerbert Xu union { 639716062fdSHerbert Xu struct inet_skb_parm h4; 640716062fdSHerbert Xu struct inet6_skb_parm h6; 641716062fdSHerbert Xu } header; 642716062fdSHerbert Xu 643716062fdSHerbert Xu unsigned int daddroff; 6442fcb45b6SHerbert Xu unsigned int family; 645716062fdSHerbert Xu }; 646716062fdSHerbert Xu 647716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 648716062fdSHerbert Xu 649161a09e7SJoy Latten /* Audit Information */ 650fd2c3ef7SEric Dumazet struct xfrm_audit { 651161a09e7SJoy Latten u32 secid; 6522532386fSEric Paris uid_t loginuid; 6532532386fSEric Paris u32 sessionid; 654161a09e7SJoy Latten }; 655c9204d9cSJoy Latten 656c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 657afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 658ab5f5e8bSJoy Latten { 659ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 660ab5f5e8bSJoy Latten 661afeb14b4SPaul Moore if (audit_enabled == 0) 662afeb14b4SPaul Moore return NULL; 663ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 664ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 665ab5f5e8bSJoy Latten if (audit_buf == NULL) 666ab5f5e8bSJoy Latten return NULL; 667afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 668afeb14b4SPaul Moore return audit_buf; 669afeb14b4SPaul Moore } 670afeb14b4SPaul Moore 6712532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 672afeb14b4SPaul Moore struct audit_buffer *audit_buf) 673afeb14b4SPaul Moore { 674afeb14b4SPaul Moore char *secctx; 675afeb14b4SPaul Moore u32 secctx_len; 676ab5f5e8bSJoy Latten 6772532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 67868277accSPaul Moore if (secid != 0 && 67968277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 680ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 681ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 682ab5f5e8bSJoy Latten } else 683ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 684ab5f5e8bSJoy Latten } 685ab5f5e8bSJoy Latten 686ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6872532386fSEric Paris u32 auid, u32 ses, u32 secid); 688ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6892532386fSEric Paris u32 auid, u32 ses, u32 secid); 690ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6912532386fSEric Paris u32 auid, u32 ses, u32 secid); 692ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6932532386fSEric Paris u32 auid, u32 ses, u32 secid); 694afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 695afeb14b4SPaul Moore struct sk_buff *skb); 696afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 697afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 698afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 699afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 700afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 701c9204d9cSJoy Latten #else 70241fef0eeSMarcin Slusarz 70341fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 70441fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70541fef0eeSMarcin Slusarz { 70641fef0eeSMarcin Slusarz } 70741fef0eeSMarcin Slusarz 70841fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 70941fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 71041fef0eeSMarcin Slusarz { 71141fef0eeSMarcin Slusarz } 71241fef0eeSMarcin Slusarz 71341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 71441fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 71541fef0eeSMarcin Slusarz { 71641fef0eeSMarcin Slusarz } 71741fef0eeSMarcin Slusarz 71841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 71941fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 72041fef0eeSMarcin Slusarz { 72141fef0eeSMarcin Slusarz } 72241fef0eeSMarcin Slusarz 72341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 72441fef0eeSMarcin Slusarz struct sk_buff *skb) 72541fef0eeSMarcin Slusarz { 72641fef0eeSMarcin Slusarz } 72741fef0eeSMarcin Slusarz 72841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 72941fef0eeSMarcin Slusarz u16 family) 73041fef0eeSMarcin Slusarz { 73141fef0eeSMarcin Slusarz } 73241fef0eeSMarcin Slusarz 73341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 73441fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 73541fef0eeSMarcin Slusarz { 73641fef0eeSMarcin Slusarz } 73741fef0eeSMarcin Slusarz 73841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 73941fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 74041fef0eeSMarcin Slusarz { 74141fef0eeSMarcin Slusarz } 742c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 743161a09e7SJoy Latten 7441da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7451da177e4SLinus Torvalds { 7461da177e4SLinus Torvalds if (likely(policy != NULL)) 7471da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds 75064c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7531da177e4SLinus Torvalds { 7541da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 75564c31b3fSWANG Cong xfrm_policy_destroy(policy); 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds 7584e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7594e81bb83SMasahide NAKAMURA { 7604e81bb83SMasahide NAKAMURA int i; 7614e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7624e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7634e81bb83SMasahide NAKAMURA } 7644e81bb83SMasahide NAKAMURA 7651da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7661da177e4SLinus Torvalds 76721380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 76821380b81SHerbert Xu { 76921380b81SHerbert Xu atomic_dec(&x->refcnt); 77021380b81SHerbert Xu } 77121380b81SHerbert Xu 7721da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7731da177e4SLinus Torvalds { 7741da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7751da177e4SLinus Torvalds __xfrm_state_destroy(x); 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7791da177e4SLinus Torvalds { 7801da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds 7831744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 7841744a8feSDavid S. Miller int prefixlen) 7851da177e4SLinus Torvalds { 7861744a8feSDavid S. Miller const __be32 *a1 = token1; 7871744a8feSDavid S. Miller const __be32 *a2 = token2; 7881da177e4SLinus Torvalds int pdw; 7891da177e4SLinus Torvalds int pbi; 7901da177e4SLinus Torvalds 791a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 7921da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds if (pdw) 7951da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7961744a8feSDavid S. Miller return false; 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds if (pbi) { 7995f19343fSAl Viro __be32 mask; 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8041744a8feSDavid S. Miller return false; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 8071744a8feSDavid S. Miller return true; 8081da177e4SLinus Torvalds } 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds static __inline__ 8116281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8121da177e4SLinus Torvalds { 813f9d07e41SAl Viro __be16 port; 8141d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8151da177e4SLinus Torvalds case IPPROTO_TCP: 8161da177e4SLinus Torvalds case IPPROTO_UDP: 817ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8181da177e4SLinus Torvalds case IPPROTO_SCTP: 8196281dcc9SDavid S. Miller port = uli->ports.sport; 8201da177e4SLinus Torvalds break; 8211da177e4SLinus Torvalds case IPPROTO_ICMP: 8221da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8236281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8241da177e4SLinus Torvalds break; 8252ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8266281dcc9SDavid S. Miller port = htons(uli->mht.type); 8272ce4272aSMasahide NAKAMURA break; 828cc9ff19dSTimo Teräs case IPPROTO_GRE: 8296281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 830cc9ff19dSTimo Teräs break; 8311da177e4SLinus Torvalds default: 8321da177e4SLinus Torvalds port = 0; /*XXX*/ 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds return port; 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds static __inline__ 8386281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8391da177e4SLinus Torvalds { 840f9d07e41SAl Viro __be16 port; 8411d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8421da177e4SLinus Torvalds case IPPROTO_TCP: 8431da177e4SLinus Torvalds case IPPROTO_UDP: 844ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8451da177e4SLinus Torvalds case IPPROTO_SCTP: 8466281dcc9SDavid S. Miller port = uli->ports.dport; 8471da177e4SLinus Torvalds break; 8481da177e4SLinus Torvalds case IPPROTO_ICMP: 8491da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8506281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8511da177e4SLinus Torvalds break; 852cc9ff19dSTimo Teräs case IPPROTO_GRE: 8536281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 854cc9ff19dSTimo Teräs break; 8551da177e4SLinus Torvalds default: 8561da177e4SLinus Torvalds port = 0; /*XXX*/ 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds return port; 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds 861200ce96eSDavid S. Miller extern int xfrm_selector_match(const struct xfrm_selector *sel, 862e1ad2ab2SDavid S. Miller const struct flowi *fl, 86377681021SAndrew Morton unsigned short family); 8641da177e4SLinus Torvalds 865df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 866df71837dSTrent Jaeger /* If neither has a context --> match 867df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 868df71837dSTrent Jaeger */ 869df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 870df71837dSTrent Jaeger { 871df71837dSTrent Jaeger return ((!s1 && !s2) || 872df71837dSTrent Jaeger (s1 && s2 && 873df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 874df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 875df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 876df71837dSTrent Jaeger } 877df71837dSTrent Jaeger #else 878df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 879df71837dSTrent Jaeger { 880df71837dSTrent Jaeger return 1; 881df71837dSTrent Jaeger } 882df71837dSTrent Jaeger #endif 883df71837dSTrent Jaeger 8841da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8851da177e4SLinus Torvalds * 8861da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8871da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8881da177e4SLinus Torvalds * 8891da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8901da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8911da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8921da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8931da177e4SLinus Torvalds * policy rule. 8941da177e4SLinus Torvalds */ 895fd2c3ef7SEric Dumazet struct xfrm_dst { 8961da177e4SLinus Torvalds union { 8971da177e4SLinus Torvalds struct dst_entry dst; 8981da177e4SLinus Torvalds struct rtable rt; 8991da177e4SLinus Torvalds struct rt6_info rt6; 9001da177e4SLinus Torvalds } u; 9011da177e4SLinus Torvalds struct dst_entry *route; 90280c802f3STimo Teräs struct flow_cache_object flo; 90380c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 90480c802f3STimo Teräs int num_pols, num_xfrms; 905157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 906157bfc25SMasahide NAKAMURA struct flowi *origin; 907157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 908157bfc25SMasahide NAKAMURA #endif 90980c802f3STimo Teräs u32 xfrm_genid; 91080c802f3STimo Teräs u32 policy_genid; 9111da177e4SLinus Torvalds u32 route_mtu_cached; 9121da177e4SLinus Torvalds u32 child_mtu_cached; 91392d63decSHideaki YOSHIFUJI u32 route_cookie; 91492d63decSHideaki YOSHIFUJI u32 path_cookie; 9151da177e4SLinus Torvalds }; 9161da177e4SLinus Torvalds 917def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 918aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 919aabc9761SHerbert Xu { 92080c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 921aabc9761SHerbert Xu dst_release(xdst->route); 922aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 923aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 924157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 925157bfc25SMasahide NAKAMURA kfree(xdst->origin); 926157bfc25SMasahide NAKAMURA xdst->origin = NULL; 927157bfc25SMasahide NAKAMURA kfree(xdst->partner); 928157bfc25SMasahide NAKAMURA xdst->partner = NULL; 929157bfc25SMasahide NAKAMURA #endif 930aabc9761SHerbert Xu } 931def8b4faSAlexey Dobriyan #endif 932aabc9761SHerbert Xu 933aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 934aabc9761SHerbert Xu 935fd2c3ef7SEric Dumazet struct sec_path { 9361da177e4SLinus Torvalds atomic_t refcnt; 9371da177e4SLinus Torvalds int len; 938dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9391da177e4SLinus Torvalds }; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds static inline struct sec_path * 9421da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9431da177e4SLinus Torvalds { 9441da177e4SLinus Torvalds if (sp) 9451da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9461da177e4SLinus Torvalds return sp; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds static inline void 9521da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9531da177e4SLinus Torvalds { 9541da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9551da177e4SLinus Torvalds __secpath_destroy(sp); 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds static inline void 9611da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9621da177e4SLinus Torvalds { 9631da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9641da177e4SLinus Torvalds secpath_put(skb->sp); 9651da177e4SLinus Torvalds skb->sp = NULL; 9661da177e4SLinus Torvalds #endif 9671da177e4SLinus Torvalds } 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds static inline int 9706cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 971a1e59abfSPatrick McHardy { 972a1e59abfSPatrick McHardy switch (family) { 973a1e59abfSPatrick McHardy case AF_INET: 974a1e59abfSPatrick McHardy return addr->a4 == 0; 975a1e59abfSPatrick McHardy case AF_INET6: 976a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 977a1e59abfSPatrick McHardy } 978a1e59abfSPatrick McHardy return 0; 979a1e59abfSPatrick McHardy } 980a1e59abfSPatrick McHardy 981a1e59abfSPatrick McHardy static inline int 98221eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 9831da177e4SLinus Torvalds { 9841da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9851da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds static inline int 98921eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 9901da177e4SLinus Torvalds { 9911da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9921da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds static inline int 99621eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 9971da177e4SLinus Torvalds { 9981da177e4SLinus Torvalds switch (family) { 9991da177e4SLinus Torvalds case AF_INET: 10001da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10011da177e4SLinus Torvalds case AF_INET6: 10021da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds return !0; 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds 10071da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10081da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 10091da177e4SLinus Torvalds 1010d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1011d5422efeSHerbert Xu struct sk_buff *skb, 1012d5422efeSHerbert Xu unsigned int family, int reverse) 10131da177e4SLinus Torvalds { 1014f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1015d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1016d5422efeSHerbert Xu 10171da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1018d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10191da177e4SLinus Torvalds 1020f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1021adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1022d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1023d5422efeSHerbert Xu } 1024d5422efeSHerbert Xu 1025d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1026d5422efeSHerbert Xu { 1027d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds 10301da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10311da177e4SLinus Torvalds { 10321da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10361da177e4SLinus Torvalds { 10371da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10381da177e4SLinus Torvalds } 10391da177e4SLinus Torvalds 1040d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1041d5422efeSHerbert Xu struct sk_buff *skb) 1042d5422efeSHerbert Xu { 1043d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1044d5422efeSHerbert Xu } 1045d5422efeSHerbert Xu 1046d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1047d5422efeSHerbert Xu struct sk_buff *skb) 1048d5422efeSHerbert Xu { 1049d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1050d5422efeSHerbert Xu } 1051d5422efeSHerbert Xu 1052d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1053d5422efeSHerbert Xu unsigned int family, int reverse); 1054d5422efeSHerbert Xu 1055d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1056d5422efeSHerbert Xu unsigned int family) 1057d5422efeSHerbert Xu { 1058d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1059d5422efeSHerbert Xu } 1060d5422efeSHerbert Xu 1061d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1062d5422efeSHerbert Xu struct flowi *fl, 1063d5422efeSHerbert Xu unsigned int family) 1064d5422efeSHerbert Xu { 1065d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1066d5422efeSHerbert Xu } 1067d5422efeSHerbert Xu 10681da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10711da177e4SLinus Torvalds { 107299a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 107399a66657SAlexey Dobriyan 107499a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1075adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 10761da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10801da177e4SLinus Torvalds { 10811da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10851da177e4SLinus Torvalds { 10861da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10901da177e4SLinus Torvalds 10911da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10921da177e4SLinus Torvalds { 10931da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10941da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10951da177e4SLinus Torvalds return 0; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10984666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11011da177e4SLinus Torvalds { 11021da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 11031da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 11041da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 11071da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11081da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds #else 11131da177e4SLinus Torvalds 11141da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11151da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11161da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11171da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11181da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11191da177e4SLinus Torvalds { 11201da177e4SLinus Torvalds return 1; 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11231da177e4SLinus Torvalds { 11241da177e4SLinus Torvalds return 1; 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11271da177e4SLinus Torvalds { 11281da177e4SLinus Torvalds return 1; 11291da177e4SLinus Torvalds } 1130d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1131d5422efeSHerbert Xu struct flowi *fl, 1132d5422efeSHerbert Xu unsigned int family) 1133d5422efeSHerbert Xu { 1134d5422efeSHerbert Xu return -ENOSYS; 1135d5422efeSHerbert Xu } 1136d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1137d5422efeSHerbert Xu struct sk_buff *skb) 1138d5422efeSHerbert Xu { 1139d5422efeSHerbert Xu return 1; 1140d5422efeSHerbert Xu } 1141d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1142d5422efeSHerbert Xu struct sk_buff *skb) 1143d5422efeSHerbert Xu { 1144d5422efeSHerbert Xu return 1; 1145d5422efeSHerbert Xu } 11461da177e4SLinus Torvalds #endif 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds static __inline__ 1149e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11501da177e4SLinus Torvalds { 11511da177e4SLinus Torvalds switch (family){ 11521da177e4SLinus Torvalds case AF_INET: 11537e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 11541da177e4SLinus Torvalds case AF_INET6: 11557e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds return NULL; 11581da177e4SLinus Torvalds } 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds static __inline__ 1161e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 11621da177e4SLinus Torvalds { 11631da177e4SLinus Torvalds switch (family){ 11641da177e4SLinus Torvalds case AF_INET: 11657e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 11661da177e4SLinus Torvalds case AF_INET6: 11677e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds return NULL; 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds 11729bb182a7SYOSHIFUJI Hideaki static __inline__ 1173e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 11749bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11759bb182a7SYOSHIFUJI Hideaki unsigned short family) 11769bb182a7SYOSHIFUJI Hideaki { 11779bb182a7SYOSHIFUJI Hideaki switch(family) { 11789bb182a7SYOSHIFUJI Hideaki case AF_INET: 11797e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 11807e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 11819bb182a7SYOSHIFUJI Hideaki break; 11829bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11837e1dc7b6SDavid S. Miller ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->u.ip6.saddr); 11847e1dc7b6SDavid S. Miller ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->u.ip6.daddr); 11859bb182a7SYOSHIFUJI Hideaki break; 11869bb182a7SYOSHIFUJI Hideaki } 11879bb182a7SYOSHIFUJI Hideaki } 11889bb182a7SYOSHIFUJI Hideaki 11891da177e4SLinus Torvalds static __inline__ int 1190f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1191f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 11921da177e4SLinus Torvalds { 11931da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11941da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11951da177e4SLinus Torvalds return 1; 11961da177e4SLinus Torvalds return 0; 11971da177e4SLinus Torvalds } 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds static __inline__ int 1200f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1201f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12021da177e4SLinus Torvalds { 12031da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 12041da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 12051da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12061da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12071da177e4SLinus Torvalds return 1; 12081da177e4SLinus Torvalds return 0; 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds static __inline__ int 1212f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1213f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12141da177e4SLinus Torvalds unsigned short family) 12151da177e4SLinus Torvalds { 12161da177e4SLinus Torvalds switch (family) { 12171da177e4SLinus Torvalds case AF_INET: 12181da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12191da177e4SLinus Torvalds case AF_INET6: 12201da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12211da177e4SLinus Torvalds } 12221da177e4SLinus Torvalds return 0; 12231da177e4SLinus Torvalds } 12241da177e4SLinus Torvalds 1225e53820deSMasahide NAKAMURA static __inline__ int 1226f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1227e53820deSMasahide NAKAMURA unsigned short family) 1228e53820deSMasahide NAKAMURA { 1229e53820deSMasahide NAKAMURA switch (family) { 1230e53820deSMasahide NAKAMURA case AF_INET: 1231e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12327e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12337e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1234e53820deSMasahide NAKAMURA case AF_INET6: 1235e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12367e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 12377e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1238e53820deSMasahide NAKAMURA } 1239e53820deSMasahide NAKAMURA return 0; 1240e53820deSMasahide NAKAMURA } 1241e53820deSMasahide NAKAMURA 1242f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 12431da177e4SLinus Torvalds { 12441da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds 12475794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12485794708fSMasahide NAKAMURA { 1249dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1250dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1251dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1252dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12535794708fSMasahide NAKAMURA } 12545794708fSMasahide NAKAMURA 12551da177e4SLinus Torvalds /* 12561da177e4SLinus Torvalds * xfrm algorithm information 12571da177e4SLinus Torvalds */ 12581a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12591a6509d9SHerbert Xu u16 icv_truncbits; 12601a6509d9SHerbert Xu }; 12611a6509d9SHerbert Xu 12621da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12631da177e4SLinus Torvalds u16 icv_truncbits; 12641da177e4SLinus Torvalds u16 icv_fullbits; 12651da177e4SLinus Torvalds }; 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12681da177e4SLinus Torvalds u16 blockbits; 12691da177e4SLinus Torvalds u16 defkeybits; 12701da177e4SLinus Torvalds }; 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12731da177e4SLinus Torvalds u16 threshold; 12741da177e4SLinus Torvalds }; 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds struct xfrm_algo_desc { 12771da177e4SLinus Torvalds char *name; 127804ff1260SHerbert Xu char *compat; 12791da177e4SLinus Torvalds u8 available:1; 12801da177e4SLinus Torvalds union { 12811a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12821da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12831da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12841da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12851da177e4SLinus Torvalds } uinfo; 12861da177e4SLinus Torvalds struct sadb_alg desc; 12871da177e4SLinus Torvalds }; 12881da177e4SLinus Torvalds 12891da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12901da177e4SLinus Torvalds struct xfrm_tunnel { 12911da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1292a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1293d2acc347SHerbert Xu 1294b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1295d2acc347SHerbert Xu int priority; 12961da177e4SLinus Torvalds }; 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds struct xfrm6_tunnel { 1299d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1300d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1301d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13026f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1303d2acc347SHerbert Xu int priority; 13041da177e4SLinus Torvalds }; 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvalds extern void xfrm_init(void); 1307a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1308d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1309d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 13101da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1311c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1312c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1313c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 13140013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 13151da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1316c35b7e72SDaniel Lezcano #else 1317c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1318c35b7e72SDaniel Lezcano { 1319c35b7e72SDaniel Lezcano return 0; 1320c35b7e72SDaniel Lezcano } 1321c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1322c35b7e72SDaniel Lezcano { 1323c35b7e72SDaniel Lezcano ; 1324c35b7e72SDaniel Lezcano } 1325c35b7e72SDaniel Lezcano #endif 13261da177e4SLinus Torvalds 1327558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1328c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1329c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1330558f82efSMasahide NAKAMURA #endif 1331558f82efSMasahide NAKAMURA 1332b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1333b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1334b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1335b27aeadbSAlexey Dobriyan #else 1336b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1337b27aeadbSAlexey Dobriyan { 1338b27aeadbSAlexey Dobriyan } 1339b27aeadbSAlexey Dobriyan #endif 1340b27aeadbSAlexey Dobriyan 13415c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1342284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13434c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1344abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1345673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 134633765d06SDavid S. Miller extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 134733765d06SDavid S. Miller const xfrm_address_t *saddr, 1348b520e9f6SDavid S. Miller const struct flowi *fl, 1349b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 13501da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13511da177e4SLinus Torvalds unsigned short family); 1352bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13535447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1354628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1355628529b6SJamal Hadi Salim unsigned short family, 1356628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13571da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13581da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13591da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13601da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1361bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1362a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1363bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1364bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1365a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1366a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1367bd55775cSJamal Hadi Salim u8 proto, 1368bd55775cSJamal Hadi Salim unsigned short family); 136941a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 137041a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 137141a49cc3SMasahide NAKAMURA int n, unsigned short family); 137241a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 137341a49cc3SMasahide NAKAMURA int n, unsigned short family); 137441a49cc3SMasahide NAKAMURA #else 137541a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 137641a49cc3SMasahide NAKAMURA int n, unsigned short family) 137741a49cc3SMasahide NAKAMURA { 137841a49cc3SMasahide NAKAMURA return -ENOSYS; 137941a49cc3SMasahide NAKAMURA } 138041a49cc3SMasahide NAKAMURA 138141a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 138241a49cc3SMasahide NAKAMURA int n, unsigned short family) 138341a49cc3SMasahide NAKAMURA { 138441a49cc3SMasahide NAKAMURA return -ENOSYS; 138541a49cc3SMasahide NAKAMURA } 138641a49cc3SMasahide NAKAMURA #endif 1387af11e316SJamal Hadi Salim 1388af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1389af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1390af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1391af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1392af11e316SJamal Hadi Salim }; 1393af11e316SJamal Hadi Salim 13945a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13955a6d3416SJamal Hadi Salim u32 incnt; 13965a6d3416SJamal Hadi Salim u32 outcnt; 13975a6d3416SJamal Hadi Salim u32 fwdcnt; 13985a6d3416SJamal Hadi Salim u32 inscnt; 13995a6d3416SJamal Hadi Salim u32 outscnt; 14005a6d3416SJamal Hadi Salim u32 fwdscnt; 14015a6d3416SJamal Hadi Salim u32 spdhcnt; 14025a6d3416SJamal Hadi Salim u32 spdhmcnt; 14035a6d3416SJamal Hadi Salim }; 14045a6d3416SJamal Hadi Salim 1405bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1406bd55775cSJamal Hadi Salim u32 seq); 140726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 14080e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1409e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1410e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1411afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1412afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 141361f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1414f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 14151da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 141672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1417227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1418716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1419716062fdSHerbert Xu int encap_type); 14201bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1421c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1422406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1423df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 142436cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1425227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1426c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1427c4541b41SHerbert Xu int encap_type); 1428716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14291da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1430c4541b41SHerbert Xu 1431c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1432c4541b41SHerbert Xu { 1433c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1434c4541b41SHerbert Xu } 1435c4541b41SHerbert Xu 143636cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 143736cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14381da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1439c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1440c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 144136cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1442227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 144333b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1444716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1445e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1446fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1447fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 144873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 144973d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1450a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1451a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); 145236cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 145336cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14541da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1455aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1456aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1459067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14601da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14611da177e4SLinus Torvalds #else 14621da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14631da177e4SLinus Torvalds { 14641da177e4SLinus Torvalds return -ENOPROTOOPT; 14651da177e4SLinus Torvalds } 14661da177e4SLinus Torvalds 1467067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14681da177e4SLinus Torvalds { 14691da177e4SLinus Torvalds /* should not happen */ 14701da177e4SLinus Torvalds kfree_skb(skb); 14711da177e4SLinus Torvalds return 0; 14721da177e4SLinus Torvalds } 14731da177e4SLinus Torvalds #endif 14741da177e4SLinus Torvalds 14750331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14764c563f76STimo Teras 147712a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1478cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14794c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 148012a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14811da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14828ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 14838ca2e93bSJamal Hadi Salim u8 type, int dir, 14844e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1485ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1486ef41aaa0SEric Paris int *err); 14878ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 148833ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14891da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1490658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1491bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1492bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1493a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1494a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1495bd55775cSJamal Hadi Salim unsigned short family); 14961da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14971da177e4SLinus Torvalds 149880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1499183cad12SDavid S. Miller extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1500183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1501183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 150280c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 150380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 150480c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1505b4b7c0b3SDavid S. Miller extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 150613c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 150713c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 150880c9abaaSShinta Sugimoto #endif 150980c9abaaSShinta Sugimoto 15105d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 15116c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1512db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds extern void xfrm_input_init(void); 15156067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 15181da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15191da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15201da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15211da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15221da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15231da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15241da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15256f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 15266f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 15276f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 15286f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 15291a6509d9SHerbert Xu int probe); 15301da177e4SLinus Torvalds 153107d4ee58SHerbert Xu struct hash_desc; 15329409f38aSHerbert Xu struct scatterlist; 153307d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 153407d4ee58SHerbert Xu unsigned int); 15351da177e4SLinus Torvalds 1536ff6acd16SDavid S. Miller static inline int xfrm_addr_cmp(const xfrm_address_t *a, 1537ff6acd16SDavid S. Miller const xfrm_address_t *b, 15381da177e4SLinus Torvalds int family) 15391da177e4SLinus Torvalds { 15401da177e4SLinus Torvalds switch (family) { 15411da177e4SLinus Torvalds default: 15421da177e4SLinus Torvalds case AF_INET: 1543a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15441da177e4SLinus Torvalds case AF_INET6: 15451da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15461da177e4SLinus Torvalds (struct in6_addr *)b); 15471da177e4SLinus Torvalds } 15481da177e4SLinus Torvalds } 15491da177e4SLinus Torvalds 155077d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 155177d8d7a6SHerbert Xu { 155277d8d7a6SHerbert Xu return index & 7; 155377d8d7a6SHerbert Xu } 155477d8d7a6SHerbert Xu 1555a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1556a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1557f8cd5488SJamal Hadi Salim { 1558be33690dSPatrick McHardy struct sock *nlsk; 1559be33690dSPatrick McHardy int ret = 0; 1560be33690dSPatrick McHardy 1561be33690dSPatrick McHardy rcu_read_lock(); 1562a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1563be33690dSPatrick McHardy if (nlsk) 1564be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1565be33690dSPatrick McHardy rcu_read_unlock(); 1566be33690dSPatrick McHardy return ret; 1567f8cd5488SJamal Hadi Salim } 1568a6483b79SAlexey Dobriyan #endif 1569f8cd5488SJamal Hadi Salim 157085158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 15710f99be0dSEric Dumazet { 15720f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15730f99be0dSEric Dumazet } 15740f99be0dSEric Dumazet 157585158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 15764447bb33SMartin Willi { 15774447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15784447bb33SMartin Willi } 15794447bb33SMartin Willi 15809736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 15819736acf3SSteffen Klassert { 15829736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 15839736acf3SSteffen Klassert } 15849736acf3SSteffen Klassert 158580c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 158680c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 158780c9abaaSShinta Sugimoto { 15880f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 158980c9abaaSShinta Sugimoto } 159080c9abaaSShinta Sugimoto 15914447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 15924447bb33SMartin Willi { 15934447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 15944447bb33SMartin Willi } 15954447bb33SMartin Willi 159680c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 159780c9abaaSShinta Sugimoto { 159880c9abaaSShinta Sugimoto int i; 159980c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 160080c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 160180c9abaaSShinta Sugimoto } 160280c9abaaSShinta Sugimoto 160380c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 160480c9abaaSShinta Sugimoto { 160580c9abaaSShinta Sugimoto int i; 160680c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 160780c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 160880c9abaaSShinta Sugimoto } 160980c9abaaSShinta Sugimoto #endif 1610f8cd5488SJamal Hadi Salim 1611def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 161200501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 161300501121SHerbert Xu { 161400501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 161500501121SHerbert Xu } 1616def8b4faSAlexey Dobriyan #endif 161700501121SHerbert Xu 1618bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1619bf825f81SJamal Hadi Salim { 1620bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 16214efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1622bf825f81SJamal Hadi Salim else 1623bf825f81SJamal Hadi Salim m->v = m->m = 0; 1624bf825f81SJamal Hadi Salim 1625bf825f81SJamal Hadi Salim return m->v & m->m; 1626bf825f81SJamal Hadi Salim } 1627bf825f81SJamal Hadi Salim 1628e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1629bf825f81SJamal Hadi Salim { 1630bf825f81SJamal Hadi Salim if (m->m | m->v) 1631bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1632bf825f81SJamal Hadi Salim return 0; 1633bf825f81SJamal Hadi Salim 1634bf825f81SJamal Hadi Salim nla_put_failure: 1635bf825f81SJamal Hadi Salim return -1; 1636bf825f81SJamal Hadi Salim } 1637bf825f81SJamal Hadi Salim 16381da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1639