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 1959fdc4883SSteffen Klassert /* The functions for replay detection. */ 1969fdc4883SSteffen Klassert struct xfrm_replay *repl; 1979fdc4883SSteffen Klassert 1982717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1992717096aSJamal Hadi Salim * moment 2002717096aSJamal Hadi Salim */ 2012717096aSJamal Hadi Salim u32 xflags; 2022717096aSJamal Hadi Salim 203f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 204f8cd5488SJamal Hadi Salim u32 replay_maxage; 205f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 206f8cd5488SJamal Hadi Salim 207f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 208f8cd5488SJamal Hadi Salim struct timer_list rtimer; 209f8cd5488SJamal Hadi Salim 2101da177e4SLinus Torvalds /* Statistics */ 2111da177e4SLinus Torvalds struct xfrm_stats stats; 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2149e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2151da177e4SLinus Torvalds 2169afaca05SMasahide NAKAMURA /* Last used time */ 217d26f3984SHerbert Xu unsigned long lastused; 2189afaca05SMasahide NAKAMURA 2191da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2201da177e4SLinus Torvalds * transformer. */ 221533cb5b0SEric Dumazet const struct xfrm_type *type; 22213996378SHerbert Xu struct xfrm_mode *inner_mode; 223df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 22413996378SHerbert Xu struct xfrm_mode *outer_mode; 2251da177e4SLinus Torvalds 226df71837dSTrent Jaeger /* Security context */ 227df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 228df71837dSTrent Jaeger 2291da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2301da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2311da177e4SLinus Torvalds void *data; 2321da177e4SLinus Torvalds }; 2331da177e4SLinus Torvalds 234673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 235673c09beSAlexey Dobriyan { 236673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 237673c09beSAlexey Dobriyan } 238673c09beSAlexey Dobriyan 2392717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2402717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2412717096aSJamal Hadi Salim 2421da177e4SLinus Torvalds enum { 2431da177e4SLinus Torvalds XFRM_STATE_VOID, 2441da177e4SLinus Torvalds XFRM_STATE_ACQ, 2451da177e4SLinus Torvalds XFRM_STATE_VALID, 2461da177e4SLinus Torvalds XFRM_STATE_ERROR, 2471da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2481da177e4SLinus Torvalds XFRM_STATE_DEAD 2491da177e4SLinus Torvalds }; 2501da177e4SLinus Torvalds 25126b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 252fd2c3ef7SEric Dumazet struct km_event { 253bf08867fSHerbert Xu union { 254bf08867fSHerbert Xu u32 hard; 255bf08867fSHerbert Xu u32 proto; 256bf08867fSHerbert Xu u32 byid; 257f8cd5488SJamal Hadi Salim u32 aevent; 258f7b6983fSMasahide NAKAMURA u32 type; 259bf08867fSHerbert Xu } data; 260bf08867fSHerbert Xu 26126b15dadSJamal Hadi Salim u32 seq; 26226b15dadSJamal Hadi Salim u32 pid; 26326b15dadSJamal Hadi Salim u32 event; 2647067802eSAlexey Dobriyan struct net *net; 26526b15dadSJamal Hadi Salim }; 26626b15dadSJamal Hadi Salim 2679fdc4883SSteffen Klassert struct xfrm_replay { 2689fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2699fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2709fdc4883SSteffen Klassert struct sk_buff *skb, 2719fdc4883SSteffen Klassert __be32 net_seq); 2729fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2739fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2749fdc4883SSteffen Klassert }; 2759fdc4883SSteffen Klassert 27625ee3286SHerbert Xu struct net_device; 2771da177e4SLinus Torvalds struct xfrm_type; 2781da177e4SLinus Torvalds struct xfrm_dst; 2791da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2801da177e4SLinus Torvalds unsigned short family; 2811da177e4SLinus Torvalds struct dst_ops *dst_ops; 282ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 283c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 2845e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2855e6b930fSDavid S. Miller const xfrm_address_t *daddr); 286fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2871da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 288d5422efeSHerbert Xu struct flowi *fl, 289d5422efeSHerbert Xu int reverse); 29005d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 291a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 292a1b05140SMasahide NAKAMURA struct dst_entry *dst, 293a1b05140SMasahide NAKAMURA int nfheader_len); 29425ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 29587c1e12bSHerbert Xu struct net_device *dev, 2960c7b3eefSDavid S. Miller const struct flowi *fl); 2972774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 2981da177e4SLinus Torvalds }; 2991da177e4SLinus Torvalds 3001da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 3011da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 302214e005bSDavid S. Miller extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); 303214e005bSDavid S. Miller extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds struct xfrm_tmpl; 306980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 30753bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 30853bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 30953bc6b4dSJamal Hadi Salim 3101da177e4SLinus Torvalds struct xfrm_state_afinfo { 31117c2a42aSHerbert Xu unsigned int family; 31236cf9acfSHerbert Xu unsigned int proto; 3138e3d716cSAl Viro __be16 eth_proto; 31417c2a42aSHerbert Xu struct module *owner; 315533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 316aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 317d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 31873e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 31973e5ebb2SDavid S. Miller const struct flowi *fl); 32019bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 32119bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 32219bd6244SDavid S. Miller const xfrm_address_t *daddr, 32319bd6244SDavid S. Miller const xfrm_address_t *saddr); 32441a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 32541a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 326cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 327227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 328227620e2SHerbert Xu struct sk_buff *skb); 32936cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 33036cf9acfSHerbert Xu struct sk_buff *skb); 331716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 332716062fdSHerbert Xu int async); 3331da177e4SLinus Torvalds }; 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3361da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3391da177e4SLinus Torvalds 340fd2c3ef7SEric Dumazet struct xfrm_type { 3411da177e4SLinus Torvalds char *description; 3421da177e4SLinus Torvalds struct module *owner; 343a6337463Sjamal u8 proto; 344a6337463Sjamal u8 flags; 3451b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 346436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 347f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 348f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3491da177e4SLinus Torvalds 35072cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3511da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 352e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3531da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3548f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3558f029de2SDavid S. Miller const struct flowi *); 356aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3571da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 358c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3591da177e4SLinus Torvalds }; 3601da177e4SLinus Torvalds 361533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 362533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3631da177e4SLinus Torvalds 364b59f45d0SHerbert Xu struct xfrm_mode { 365227620e2SHerbert Xu /* 366227620e2SHerbert Xu * Remove encapsulation header. 367227620e2SHerbert Xu * 368227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 369227620e2SHerbert Xu * header. 370227620e2SHerbert Xu * 371227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 372227620e2SHerbert Xu * should be and the network header shall be set to where the IP 373227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 374227620e2SHerbert Xu * payload. 375227620e2SHerbert Xu */ 376227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 377227620e2SHerbert Xu 378227620e2SHerbert Xu /* 379227620e2SHerbert Xu * This is the actual input entry point. 380227620e2SHerbert Xu * 381227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 382227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 383227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 384227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 385227620e2SHerbert Xu */ 386b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 38737fedd3aSHerbert Xu 38837fedd3aSHerbert Xu /* 38937fedd3aSHerbert Xu * Add encapsulation header. 39037fedd3aSHerbert Xu * 39137fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 39237fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 39337fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 39437fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 39537fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 39637fedd3aSHerbert Xu * header. The value of the network header will always point 39737fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 39837fedd3aSHerbert Xu */ 39936cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 40036cf9acfSHerbert Xu 40136cf9acfSHerbert Xu /* 40236cf9acfSHerbert Xu * This is the actual output entry point. 40336cf9acfSHerbert Xu * 40436cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 40536cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 40636cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 40736cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 40836cf9acfSHerbert Xu * call output2. 40936cf9acfSHerbert Xu */ 410eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 411b59f45d0SHerbert Xu 41217c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 413b59f45d0SHerbert Xu struct module *owner; 414b59f45d0SHerbert Xu unsigned int encap; 4151bfcb10fSHerbert Xu int flags; 4161bfcb10fSHerbert Xu }; 4171bfcb10fSHerbert Xu 4181bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4191bfcb10fSHerbert Xu enum { 4201bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 421b59f45d0SHerbert Xu }; 422b59f45d0SHerbert Xu 423b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 424b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 425b59f45d0SHerbert Xu 426df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 427df9dcb45SKazunori MIYAZAWA { 428df9dcb45SKazunori MIYAZAWA switch(family) { 429df9dcb45SKazunori MIYAZAWA case AF_INET: 430df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 431df9dcb45SKazunori MIYAZAWA case AF_INET6: 432df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 433df9dcb45SKazunori MIYAZAWA default: 434df9dcb45SKazunori MIYAZAWA return 0; 435df9dcb45SKazunori MIYAZAWA } 436df9dcb45SKazunori MIYAZAWA } 437df9dcb45SKazunori MIYAZAWA 438df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 439df9dcb45SKazunori MIYAZAWA { 440df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 441df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 442df9dcb45SKazunori MIYAZAWA return x->inner_mode; 443df9dcb45SKazunori MIYAZAWA else 444df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 445df9dcb45SKazunori MIYAZAWA } 446df9dcb45SKazunori MIYAZAWA 447fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4481da177e4SLinus Torvalds /* id in template is interpreted as: 4491da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4501da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4511da177e4SLinus Torvalds * daddr must be fixed too. 4521da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4531da177e4SLinus Torvalds */ 4541da177e4SLinus Torvalds struct xfrm_id id; 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4571da177e4SLinus Torvalds xfrm_address_t saddr; 4581da177e4SLinus Torvalds 45976b3f055SMiika Komu unsigned short encap_family; 46076b3f055SMiika Komu 461a6337463Sjamal u32 reqid; 4621da177e4SLinus Torvalds 4637e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 464a6337463Sjamal u8 mode; 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 467a6337463Sjamal u8 share; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 470a6337463Sjamal u8 optional; 4711da177e4SLinus Torvalds 472c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 473a6337463Sjamal u8 allalgs; 474c5d18e98SHerbert Xu 4751da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 476a6337463Sjamal u32 aalgos; 477a6337463Sjamal u32 ealgos; 478a6337463Sjamal u32 calgos; 4791da177e4SLinus Torvalds }; 4801da177e4SLinus Torvalds 481622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4821da177e4SLinus Torvalds 48312a169e7SHerbert Xu struct xfrm_policy_walk_entry { 48412a169e7SHerbert Xu struct list_head all; 48512a169e7SHerbert Xu u8 dead; 48612a169e7SHerbert Xu }; 48712a169e7SHerbert Xu 48812a169e7SHerbert Xu struct xfrm_policy_walk { 48912a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49012a169e7SHerbert Xu u8 type; 49112a169e7SHerbert Xu u32 seq; 49212a169e7SHerbert Xu }; 49312a169e7SHerbert Xu 494fd2c3ef7SEric Dumazet struct xfrm_policy { 4950331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4960331b1f3SAlexey Dobriyan struct net *xp_net; 4970331b1f3SAlexey Dobriyan #endif 4982518c7c2SDavid S. Miller struct hlist_node bydst; 4992518c7c2SDavid S. Miller struct hlist_node byidx; 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5021da177e4SLinus Torvalds rwlock_t lock; 5031da177e4SLinus Torvalds atomic_t refcnt; 5041da177e4SLinus Torvalds struct timer_list timer; 5051da177e4SLinus Torvalds 506fe1a5f03STimo Teräs struct flow_cache_object flo; 50780c802f3STimo Teräs atomic_t genid; 5081da177e4SLinus Torvalds u32 priority; 5091da177e4SLinus Torvalds u32 index; 510bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5111da177e4SLinus Torvalds struct xfrm_selector selector; 5121da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5131da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 51412a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 51546ca5f5dSArnaldo Carvalho de Melo u8 type; 51646ca5f5dSArnaldo Carvalho de Melo u8 action; 51746ca5f5dSArnaldo Carvalho de Melo u8 flags; 51846ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 51912a169e7SHerbert Xu u16 family; 520df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5211da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5221da177e4SLinus Torvalds }; 5231da177e4SLinus Torvalds 52463eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5250331b1f3SAlexey Dobriyan { 5260331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5270331b1f3SAlexey Dobriyan } 5280331b1f3SAlexey Dobriyan 52913c1d189SArnaud Ebalard struct xfrm_kmaddress { 53013c1d189SArnaud Ebalard xfrm_address_t local; 53113c1d189SArnaud Ebalard xfrm_address_t remote; 53213c1d189SArnaud Ebalard u32 reserved; 53313c1d189SArnaud Ebalard u16 family; 53413c1d189SArnaud Ebalard }; 53513c1d189SArnaud Ebalard 53680c9abaaSShinta Sugimoto struct xfrm_migrate { 53780c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 53880c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 53980c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 54080c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 54180c9abaaSShinta Sugimoto u8 proto; 54280c9abaaSShinta Sugimoto u8 mode; 54380c9abaaSShinta Sugimoto u16 reserved; 54480c9abaaSShinta Sugimoto u32 reqid; 54580c9abaaSShinta Sugimoto u16 old_family; 54680c9abaaSShinta Sugimoto u16 new_family; 54780c9abaaSShinta Sugimoto }; 54880c9abaaSShinta Sugimoto 5491da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 550f8cd5488SJamal Hadi Salim /* which seqno */ 551f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 552f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 553f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 554f8cd5488SJamal Hadi Salim /* what happened */ 555f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 556f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 557f8cd5488SJamal Hadi Salim 558f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 559f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 560f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 561f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 562f8cd5488SJamal Hadi Salim /* default seq threshold size */ 563f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5641da177e4SLinus Torvalds 565fd2c3ef7SEric Dumazet struct xfrm_mgr { 5661da177e4SLinus Torvalds struct list_head list; 5671da177e4SLinus Torvalds char *id; 568214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 5691da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 570cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5715d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 572214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 573db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 574183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 575183cad12SDavid S. Miller u8 dir, u8 type, 576183cad12SDavid S. Miller const struct xfrm_migrate *m, 577183cad12SDavid S. Miller int num_bundles, 578183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 5791da177e4SLinus Torvalds }; 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5821da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5831da177e4SLinus Torvalds 584436a0a40SHerbert Xu /* 585436a0a40SHerbert Xu * This structure is used for the duration where packets are being 586436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 587436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 588436a0a40SHerbert Xu */ 589436a0a40SHerbert Xu struct xfrm_skb_cb { 590436a0a40SHerbert Xu union { 591436a0a40SHerbert Xu struct inet_skb_parm h4; 592436a0a40SHerbert Xu struct inet6_skb_parm h6; 593436a0a40SHerbert Xu } header; 594436a0a40SHerbert Xu 595436a0a40SHerbert Xu /* Sequence number for replay protection. */ 596b318e0e4SHerbert Xu union { 5971ce3644aSSteffen Klassert struct { 5981ce3644aSSteffen Klassert __u32 low; 5991ce3644aSSteffen Klassert __u32 hi; 6001ce3644aSSteffen Klassert } output; 6011ce3644aSSteffen Klassert struct { 6021ce3644aSSteffen Klassert __be32 low; 6031ce3644aSSteffen Klassert __be32 hi; 6041ce3644aSSteffen Klassert } input; 605b318e0e4SHerbert Xu } seq; 606436a0a40SHerbert Xu }; 607436a0a40SHerbert Xu 608436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 609436a0a40SHerbert Xu 61036cf9acfSHerbert Xu /* 61136cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 61236cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 61336cf9acfSHerbert Xu */ 61436cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 61536cf9acfSHerbert Xu union { 61636cf9acfSHerbert Xu struct inet_skb_parm h4; 61736cf9acfSHerbert Xu struct inet6_skb_parm h6; 61836cf9acfSHerbert Xu } header; 61936cf9acfSHerbert Xu 62036cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 62136cf9acfSHerbert Xu __be16 id; 62236cf9acfSHerbert Xu __be16 frag_off; 62336cf9acfSHerbert Xu 624732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 625732c8bd5SHerbert Xu u8 ihl; 626732c8bd5SHerbert Xu 62736cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 62836cf9acfSHerbert Xu u8 tos; 62936cf9acfSHerbert Xu 63036cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 63136cf9acfSHerbert Xu u8 ttl; 63236cf9acfSHerbert Xu 63336cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 63436cf9acfSHerbert Xu u8 protocol; 63536cf9acfSHerbert Xu 636732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 637732c8bd5SHerbert Xu u8 optlen; 638732c8bd5SHerbert Xu 63936cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 64036cf9acfSHerbert Xu u8 flow_lbl[3]; 64136cf9acfSHerbert Xu }; 64236cf9acfSHerbert Xu 64336cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 64436cf9acfSHerbert Xu 645716062fdSHerbert Xu /* 646716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 647716062fdSHerbert Xu * related information. 648716062fdSHerbert Xu */ 649716062fdSHerbert Xu struct xfrm_spi_skb_cb { 650716062fdSHerbert Xu union { 651716062fdSHerbert Xu struct inet_skb_parm h4; 652716062fdSHerbert Xu struct inet6_skb_parm h6; 653716062fdSHerbert Xu } header; 654716062fdSHerbert Xu 655716062fdSHerbert Xu unsigned int daddroff; 6562fcb45b6SHerbert Xu unsigned int family; 657716062fdSHerbert Xu }; 658716062fdSHerbert Xu 659716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 660716062fdSHerbert Xu 661161a09e7SJoy Latten /* Audit Information */ 662fd2c3ef7SEric Dumazet struct xfrm_audit { 663161a09e7SJoy Latten u32 secid; 6642532386fSEric Paris uid_t loginuid; 6652532386fSEric Paris u32 sessionid; 666161a09e7SJoy Latten }; 667c9204d9cSJoy Latten 668c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 669afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 670ab5f5e8bSJoy Latten { 671ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 672ab5f5e8bSJoy Latten 673afeb14b4SPaul Moore if (audit_enabled == 0) 674afeb14b4SPaul Moore return NULL; 675ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 676ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 677ab5f5e8bSJoy Latten if (audit_buf == NULL) 678ab5f5e8bSJoy Latten return NULL; 679afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 680afeb14b4SPaul Moore return audit_buf; 681afeb14b4SPaul Moore } 682afeb14b4SPaul Moore 6832532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 684afeb14b4SPaul Moore struct audit_buffer *audit_buf) 685afeb14b4SPaul Moore { 686afeb14b4SPaul Moore char *secctx; 687afeb14b4SPaul Moore u32 secctx_len; 688ab5f5e8bSJoy Latten 6892532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 69068277accSPaul Moore if (secid != 0 && 69168277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 692ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 693ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 694ab5f5e8bSJoy Latten } else 695ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 696ab5f5e8bSJoy Latten } 697ab5f5e8bSJoy Latten 698ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6992532386fSEric Paris u32 auid, u32 ses, u32 secid); 700ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7012532386fSEric Paris u32 auid, u32 ses, u32 secid); 702ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 7032532386fSEric Paris u32 auid, u32 ses, u32 secid); 704ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7052532386fSEric Paris u32 auid, u32 ses, u32 secid); 706afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 707afeb14b4SPaul Moore struct sk_buff *skb); 7089fdc4883SSteffen Klassert extern void xfrm_audit_state_replay(struct xfrm_state *x, 7099fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq); 710afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 711afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 712afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 713afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 714afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 715c9204d9cSJoy Latten #else 71641fef0eeSMarcin Slusarz 71741fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 71841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 71941fef0eeSMarcin Slusarz { 72041fef0eeSMarcin Slusarz } 72141fef0eeSMarcin Slusarz 72241fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 72341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 72441fef0eeSMarcin Slusarz { 72541fef0eeSMarcin Slusarz } 72641fef0eeSMarcin Slusarz 72741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 72841fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 72941fef0eeSMarcin Slusarz { 73041fef0eeSMarcin Slusarz } 73141fef0eeSMarcin Slusarz 73241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 73341fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 73441fef0eeSMarcin Slusarz { 73541fef0eeSMarcin Slusarz } 73641fef0eeSMarcin Slusarz 73741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 73841fef0eeSMarcin Slusarz struct sk_buff *skb) 73941fef0eeSMarcin Slusarz { 74041fef0eeSMarcin Slusarz } 74141fef0eeSMarcin Slusarz 7429fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7439fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7449fdc4883SSteffen Klassert { 7459fdc4883SSteffen Klassert } 7469fdc4883SSteffen Klassert 74741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 74841fef0eeSMarcin Slusarz u16 family) 74941fef0eeSMarcin Slusarz { 75041fef0eeSMarcin Slusarz } 75141fef0eeSMarcin Slusarz 75241fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 75341fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 75441fef0eeSMarcin Slusarz { 75541fef0eeSMarcin Slusarz } 75641fef0eeSMarcin Slusarz 75741fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 75841fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 75941fef0eeSMarcin Slusarz { 76041fef0eeSMarcin Slusarz } 761c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 762161a09e7SJoy Latten 7631da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7641da177e4SLinus Torvalds { 7651da177e4SLinus Torvalds if (likely(policy != NULL)) 7661da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds 76964c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7721da177e4SLinus Torvalds { 7731da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 77464c31b3fSWANG Cong xfrm_policy_destroy(policy); 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds 7774e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7784e81bb83SMasahide NAKAMURA { 7794e81bb83SMasahide NAKAMURA int i; 7804e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7814e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7824e81bb83SMasahide NAKAMURA } 7834e81bb83SMasahide NAKAMURA 7841da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7851da177e4SLinus Torvalds 78621380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 78721380b81SHerbert Xu { 78821380b81SHerbert Xu atomic_dec(&x->refcnt); 78921380b81SHerbert Xu } 79021380b81SHerbert Xu 7911da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7921da177e4SLinus Torvalds { 7931da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7941da177e4SLinus Torvalds __xfrm_state_destroy(x); 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7981da177e4SLinus Torvalds { 7991da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8031744a8feSDavid S. Miller int prefixlen) 8041da177e4SLinus Torvalds { 8051744a8feSDavid S. Miller const __be32 *a1 = token1; 8061744a8feSDavid S. Miller const __be32 *a2 = token2; 8071da177e4SLinus Torvalds int pdw; 8081da177e4SLinus Torvalds int pbi; 8091da177e4SLinus Torvalds 810a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8111da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds if (pdw) 8141da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8151744a8feSDavid S. Miller return false; 8161da177e4SLinus Torvalds 8171da177e4SLinus Torvalds if (pbi) { 8185f19343fSAl Viro __be32 mask; 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8231744a8feSDavid S. Miller return false; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds 8261744a8feSDavid S. Miller return true; 8271da177e4SLinus Torvalds } 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds static __inline__ 8306281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8311da177e4SLinus Torvalds { 832f9d07e41SAl Viro __be16 port; 8331d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8341da177e4SLinus Torvalds case IPPROTO_TCP: 8351da177e4SLinus Torvalds case IPPROTO_UDP: 836ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8371da177e4SLinus Torvalds case IPPROTO_SCTP: 8386281dcc9SDavid S. Miller port = uli->ports.sport; 8391da177e4SLinus Torvalds break; 8401da177e4SLinus Torvalds case IPPROTO_ICMP: 8411da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8426281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8431da177e4SLinus Torvalds break; 8442ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8456281dcc9SDavid S. Miller port = htons(uli->mht.type); 8462ce4272aSMasahide NAKAMURA break; 847cc9ff19dSTimo Teräs case IPPROTO_GRE: 8486281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 849cc9ff19dSTimo Teräs break; 8501da177e4SLinus Torvalds default: 8511da177e4SLinus Torvalds port = 0; /*XXX*/ 8521da177e4SLinus Torvalds } 8531da177e4SLinus Torvalds return port; 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvalds static __inline__ 8576281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8581da177e4SLinus Torvalds { 859f9d07e41SAl Viro __be16 port; 8601d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8611da177e4SLinus Torvalds case IPPROTO_TCP: 8621da177e4SLinus Torvalds case IPPROTO_UDP: 863ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8641da177e4SLinus Torvalds case IPPROTO_SCTP: 8656281dcc9SDavid S. Miller port = uli->ports.dport; 8661da177e4SLinus Torvalds break; 8671da177e4SLinus Torvalds case IPPROTO_ICMP: 8681da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8696281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8701da177e4SLinus Torvalds break; 871cc9ff19dSTimo Teräs case IPPROTO_GRE: 8726281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 873cc9ff19dSTimo Teräs break; 8741da177e4SLinus Torvalds default: 8751da177e4SLinus Torvalds port = 0; /*XXX*/ 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds return port; 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds 880200ce96eSDavid S. Miller extern int xfrm_selector_match(const struct xfrm_selector *sel, 881e1ad2ab2SDavid S. Miller const struct flowi *fl, 88277681021SAndrew Morton unsigned short family); 8831da177e4SLinus Torvalds 884df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 885df71837dSTrent Jaeger /* If neither has a context --> match 886df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 887df71837dSTrent Jaeger */ 888df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 889df71837dSTrent Jaeger { 890df71837dSTrent Jaeger return ((!s1 && !s2) || 891df71837dSTrent Jaeger (s1 && s2 && 892df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 893df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 894df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 895df71837dSTrent Jaeger } 896df71837dSTrent Jaeger #else 897df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 898df71837dSTrent Jaeger { 899df71837dSTrent Jaeger return 1; 900df71837dSTrent Jaeger } 901df71837dSTrent Jaeger #endif 902df71837dSTrent Jaeger 9031da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9041da177e4SLinus Torvalds * 9051da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9061da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9071da177e4SLinus Torvalds * 9081da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9091da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9101da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9111da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9121da177e4SLinus Torvalds * policy rule. 9131da177e4SLinus Torvalds */ 914fd2c3ef7SEric Dumazet struct xfrm_dst { 9151da177e4SLinus Torvalds union { 9161da177e4SLinus Torvalds struct dst_entry dst; 9171da177e4SLinus Torvalds struct rtable rt; 9181da177e4SLinus Torvalds struct rt6_info rt6; 9191da177e4SLinus Torvalds } u; 9201da177e4SLinus Torvalds struct dst_entry *route; 92180c802f3STimo Teräs struct flow_cache_object flo; 92280c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 92380c802f3STimo Teräs int num_pols, num_xfrms; 924157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 925157bfc25SMasahide NAKAMURA struct flowi *origin; 926157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 927157bfc25SMasahide NAKAMURA #endif 92880c802f3STimo Teräs u32 xfrm_genid; 92980c802f3STimo Teräs u32 policy_genid; 9301da177e4SLinus Torvalds u32 route_mtu_cached; 9311da177e4SLinus Torvalds u32 child_mtu_cached; 93292d63decSHideaki YOSHIFUJI u32 route_cookie; 93392d63decSHideaki YOSHIFUJI u32 path_cookie; 9341da177e4SLinus Torvalds }; 9351da177e4SLinus Torvalds 936def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 937aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 938aabc9761SHerbert Xu { 93980c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 940aabc9761SHerbert Xu dst_release(xdst->route); 941aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 942aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 943157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 944157bfc25SMasahide NAKAMURA kfree(xdst->origin); 945157bfc25SMasahide NAKAMURA xdst->origin = NULL; 946157bfc25SMasahide NAKAMURA kfree(xdst->partner); 947157bfc25SMasahide NAKAMURA xdst->partner = NULL; 948157bfc25SMasahide NAKAMURA #endif 949aabc9761SHerbert Xu } 950def8b4faSAlexey Dobriyan #endif 951aabc9761SHerbert Xu 952aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 953aabc9761SHerbert Xu 954fd2c3ef7SEric Dumazet struct sec_path { 9551da177e4SLinus Torvalds atomic_t refcnt; 9561da177e4SLinus Torvalds int len; 957dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9581da177e4SLinus Torvalds }; 9591da177e4SLinus Torvalds 960990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 961990078afSMichael Smith { 962990078afSMichael Smith #ifdef CONFIG_XFRM 963990078afSMichael Smith return skb->sp != NULL; 964990078afSMichael Smith #else 965990078afSMichael Smith return 0; 966990078afSMichael Smith #endif 967990078afSMichael Smith } 968990078afSMichael Smith 9691da177e4SLinus Torvalds static inline struct sec_path * 9701da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9711da177e4SLinus Torvalds { 9721da177e4SLinus Torvalds if (sp) 9731da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9741da177e4SLinus Torvalds return sp; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds static inline void 9801da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9811da177e4SLinus Torvalds { 9821da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9831da177e4SLinus Torvalds __secpath_destroy(sp); 9841da177e4SLinus Torvalds } 9851da177e4SLinus Torvalds 9861da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds static inline void 9891da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9901da177e4SLinus Torvalds { 9911da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9921da177e4SLinus Torvalds secpath_put(skb->sp); 9931da177e4SLinus Torvalds skb->sp = NULL; 9941da177e4SLinus Torvalds #endif 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds static inline int 9986cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 999a1e59abfSPatrick McHardy { 1000a1e59abfSPatrick McHardy switch (family) { 1001a1e59abfSPatrick McHardy case AF_INET: 1002a1e59abfSPatrick McHardy return addr->a4 == 0; 1003a1e59abfSPatrick McHardy case AF_INET6: 1004a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 1005a1e59abfSPatrick McHardy } 1006a1e59abfSPatrick McHardy return 0; 1007a1e59abfSPatrick McHardy } 1008a1e59abfSPatrick McHardy 1009a1e59abfSPatrick McHardy static inline int 101021eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10111da177e4SLinus Torvalds { 10121da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10131da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds static inline int 101721eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10181da177e4SLinus Torvalds { 10191da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 10201da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds static inline int 102421eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10251da177e4SLinus Torvalds { 10261da177e4SLinus Torvalds switch (family) { 10271da177e4SLinus Torvalds case AF_INET: 10281da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10291da177e4SLinus Torvalds case AF_INET6: 10301da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10311da177e4SLinus Torvalds } 10321da177e4SLinus Torvalds return !0; 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10361da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 10371da177e4SLinus Torvalds 1038d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1039d5422efeSHerbert Xu struct sk_buff *skb, 1040d5422efeSHerbert Xu unsigned int family, int reverse) 10411da177e4SLinus Torvalds { 1042f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1043d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1044d5422efeSHerbert Xu 10451da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1046d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10471da177e4SLinus Torvalds 1048f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1049adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1050d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1051d5422efeSHerbert Xu } 1052d5422efeSHerbert Xu 1053d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1054d5422efeSHerbert Xu { 1055d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10591da177e4SLinus Torvalds { 10601da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds 1068d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1069d5422efeSHerbert Xu struct sk_buff *skb) 1070d5422efeSHerbert Xu { 1071d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1072d5422efeSHerbert Xu } 1073d5422efeSHerbert Xu 1074d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1075d5422efeSHerbert Xu struct sk_buff *skb) 1076d5422efeSHerbert Xu { 1077d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1078d5422efeSHerbert Xu } 1079d5422efeSHerbert Xu 1080d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1081d5422efeSHerbert Xu unsigned int family, int reverse); 1082d5422efeSHerbert Xu 1083d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1084d5422efeSHerbert Xu unsigned int family) 1085d5422efeSHerbert Xu { 1086d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1087d5422efeSHerbert Xu } 1088d5422efeSHerbert Xu 1089d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1090d5422efeSHerbert Xu struct flowi *fl, 1091d5422efeSHerbert Xu unsigned int family) 1092d5422efeSHerbert Xu { 1093d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1094d5422efeSHerbert Xu } 1095d5422efeSHerbert Xu 10961da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10991da177e4SLinus Torvalds { 110099a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 110199a66657SAlexey Dobriyan 110299a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1103adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11041da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11081da177e4SLinus Torvalds { 11091da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11131da177e4SLinus Torvalds { 11141da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 11181da177e4SLinus Torvalds 11191da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 11201da177e4SLinus Torvalds { 11211da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 11221da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 11231da177e4SLinus Torvalds return 0; 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds 11264666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 11311da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 11321da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 11351da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11361da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds #else 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11431da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11441da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11451da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11461da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11471da177e4SLinus Torvalds { 11481da177e4SLinus Torvalds return 1; 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11511da177e4SLinus Torvalds { 11521da177e4SLinus Torvalds return 1; 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11551da177e4SLinus Torvalds { 11561da177e4SLinus Torvalds return 1; 11571da177e4SLinus Torvalds } 1158d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1159d5422efeSHerbert Xu struct flowi *fl, 1160d5422efeSHerbert Xu unsigned int family) 1161d5422efeSHerbert Xu { 1162d5422efeSHerbert Xu return -ENOSYS; 1163d5422efeSHerbert Xu } 1164d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1165d5422efeSHerbert Xu struct sk_buff *skb) 1166d5422efeSHerbert Xu { 1167d5422efeSHerbert Xu return 1; 1168d5422efeSHerbert Xu } 1169d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1170d5422efeSHerbert Xu struct sk_buff *skb) 1171d5422efeSHerbert Xu { 1172d5422efeSHerbert Xu return 1; 1173d5422efeSHerbert Xu } 11741da177e4SLinus Torvalds #endif 11751da177e4SLinus Torvalds 11761da177e4SLinus Torvalds static __inline__ 1177e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11781da177e4SLinus Torvalds { 11791da177e4SLinus Torvalds switch (family){ 11801da177e4SLinus Torvalds case AF_INET: 11817e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 11821da177e4SLinus Torvalds case AF_INET6: 11837e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds return NULL; 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds 11881da177e4SLinus Torvalds static __inline__ 1189e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 11901da177e4SLinus Torvalds { 11911da177e4SLinus Torvalds switch (family){ 11921da177e4SLinus Torvalds case AF_INET: 11937e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 11941da177e4SLinus Torvalds case AF_INET6: 11957e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds return NULL; 11981da177e4SLinus Torvalds } 11991da177e4SLinus Torvalds 12009bb182a7SYOSHIFUJI Hideaki static __inline__ 1201e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12029bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12039bb182a7SYOSHIFUJI Hideaki unsigned short family) 12049bb182a7SYOSHIFUJI Hideaki { 12059bb182a7SYOSHIFUJI Hideaki switch(family) { 12069bb182a7SYOSHIFUJI Hideaki case AF_INET: 12077e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12087e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12099bb182a7SYOSHIFUJI Hideaki break; 12109bb182a7SYOSHIFUJI Hideaki case AF_INET6: 12117e1dc7b6SDavid S. Miller ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->u.ip6.saddr); 12127e1dc7b6SDavid S. Miller ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->u.ip6.daddr); 12139bb182a7SYOSHIFUJI Hideaki break; 12149bb182a7SYOSHIFUJI Hideaki } 12159bb182a7SYOSHIFUJI Hideaki } 12169bb182a7SYOSHIFUJI Hideaki 12171da177e4SLinus Torvalds static __inline__ int 1218f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1219f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12201da177e4SLinus Torvalds { 12211da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12221da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12231da177e4SLinus Torvalds return 1; 12241da177e4SLinus Torvalds return 0; 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds static __inline__ int 1228f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1229f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12301da177e4SLinus Torvalds { 12311da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 12321da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 12331da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12341da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12351da177e4SLinus Torvalds return 1; 12361da177e4SLinus Torvalds return 0; 12371da177e4SLinus Torvalds } 12381da177e4SLinus Torvalds 12391da177e4SLinus Torvalds static __inline__ int 1240f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1241f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12421da177e4SLinus Torvalds unsigned short family) 12431da177e4SLinus Torvalds { 12441da177e4SLinus Torvalds switch (family) { 12451da177e4SLinus Torvalds case AF_INET: 12461da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12471da177e4SLinus Torvalds case AF_INET6: 12481da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12491da177e4SLinus Torvalds } 12501da177e4SLinus Torvalds return 0; 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds 1253e53820deSMasahide NAKAMURA static __inline__ int 1254f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1255e53820deSMasahide NAKAMURA unsigned short family) 1256e53820deSMasahide NAKAMURA { 1257e53820deSMasahide NAKAMURA switch (family) { 1258e53820deSMasahide NAKAMURA case AF_INET: 1259e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12607e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12617e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1262e53820deSMasahide NAKAMURA case AF_INET6: 1263e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12647e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 12657e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1266e53820deSMasahide NAKAMURA } 1267e53820deSMasahide NAKAMURA return 0; 1268e53820deSMasahide NAKAMURA } 1269e53820deSMasahide NAKAMURA 1270f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 12711da177e4SLinus Torvalds { 12721da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12731da177e4SLinus Torvalds } 12741da177e4SLinus Torvalds 12755794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12765794708fSMasahide NAKAMURA { 1277dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1278dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1279dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1280dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12815794708fSMasahide NAKAMURA } 12825794708fSMasahide NAKAMURA 12831da177e4SLinus Torvalds /* 12841da177e4SLinus Torvalds * xfrm algorithm information 12851da177e4SLinus Torvalds */ 12861a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12871a6509d9SHerbert Xu u16 icv_truncbits; 12881a6509d9SHerbert Xu }; 12891a6509d9SHerbert Xu 12901da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12911da177e4SLinus Torvalds u16 icv_truncbits; 12921da177e4SLinus Torvalds u16 icv_fullbits; 12931da177e4SLinus Torvalds }; 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12961da177e4SLinus Torvalds u16 blockbits; 12971da177e4SLinus Torvalds u16 defkeybits; 12981da177e4SLinus Torvalds }; 12991da177e4SLinus Torvalds 13001da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13011da177e4SLinus Torvalds u16 threshold; 13021da177e4SLinus Torvalds }; 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds struct xfrm_algo_desc { 13051da177e4SLinus Torvalds char *name; 130604ff1260SHerbert Xu char *compat; 13071da177e4SLinus Torvalds u8 available:1; 13081da177e4SLinus Torvalds union { 13091a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13101da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13111da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13121da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13131da177e4SLinus Torvalds } uinfo; 13141da177e4SLinus Torvalds struct sadb_alg desc; 13151da177e4SLinus Torvalds }; 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13181da177e4SLinus Torvalds struct xfrm_tunnel { 13191da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1320a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1321d2acc347SHerbert Xu 1322b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1323d2acc347SHerbert Xu int priority; 13241da177e4SLinus Torvalds }; 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds struct xfrm6_tunnel { 1327d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1328d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1329d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13306f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1331d2acc347SHerbert Xu int priority; 13321da177e4SLinus Torvalds }; 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds extern void xfrm_init(void); 1335a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1336d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1337d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 13381da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1339c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1340c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1341c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 13420013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 13431da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1344c35b7e72SDaniel Lezcano #else 1345c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1346c35b7e72SDaniel Lezcano { 1347c35b7e72SDaniel Lezcano return 0; 1348c35b7e72SDaniel Lezcano } 1349c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1350c35b7e72SDaniel Lezcano { 1351c35b7e72SDaniel Lezcano ; 1352c35b7e72SDaniel Lezcano } 1353c35b7e72SDaniel Lezcano #endif 13541da177e4SLinus Torvalds 1355558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1356c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1357c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1358558f82efSMasahide NAKAMURA #endif 1359558f82efSMasahide NAKAMURA 1360b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1361b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1362b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1363b27aeadbSAlexey Dobriyan #else 1364b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1365b27aeadbSAlexey Dobriyan { 1366b27aeadbSAlexey Dobriyan } 1367b27aeadbSAlexey Dobriyan #endif 1368b27aeadbSAlexey Dobriyan 13695c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1370284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13714c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1372abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1373673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 137433765d06SDavid S. Miller extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 137533765d06SDavid S. Miller const xfrm_address_t *saddr, 1376b520e9f6SDavid S. Miller const struct flowi *fl, 1377b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 13781da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13791da177e4SLinus Torvalds unsigned short family); 1380bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13815447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1382628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1383628529b6SJamal Hadi Salim unsigned short family, 1384628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13851da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13861da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13871da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13881da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1389bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1390a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1391bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1392bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1393a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1394a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1395bd55775cSJamal Hadi Salim u8 proto, 1396bd55775cSJamal Hadi Salim unsigned short family); 139741a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 139841a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 139941a49cc3SMasahide NAKAMURA int n, unsigned short family); 140041a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 140141a49cc3SMasahide NAKAMURA int n, unsigned short family); 140241a49cc3SMasahide NAKAMURA #else 140341a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 140441a49cc3SMasahide NAKAMURA int n, unsigned short family) 140541a49cc3SMasahide NAKAMURA { 140641a49cc3SMasahide NAKAMURA return -ENOSYS; 140741a49cc3SMasahide NAKAMURA } 140841a49cc3SMasahide NAKAMURA 140941a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 141041a49cc3SMasahide NAKAMURA int n, unsigned short family) 141141a49cc3SMasahide NAKAMURA { 141241a49cc3SMasahide NAKAMURA return -ENOSYS; 141341a49cc3SMasahide NAKAMURA } 141441a49cc3SMasahide NAKAMURA #endif 1415af11e316SJamal Hadi Salim 1416af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1417af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1418af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1419af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1420af11e316SJamal Hadi Salim }; 1421af11e316SJamal Hadi Salim 14225a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14235a6d3416SJamal Hadi Salim u32 incnt; 14245a6d3416SJamal Hadi Salim u32 outcnt; 14255a6d3416SJamal Hadi Salim u32 fwdcnt; 14265a6d3416SJamal Hadi Salim u32 inscnt; 14275a6d3416SJamal Hadi Salim u32 outscnt; 14285a6d3416SJamal Hadi Salim u32 fwdscnt; 14295a6d3416SJamal Hadi Salim u32 spdhcnt; 14305a6d3416SJamal Hadi Salim u32 spdhmcnt; 14315a6d3416SJamal Hadi Salim }; 14325a6d3416SJamal Hadi Salim 1433bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1434bd55775cSJamal Hadi Salim u32 seq); 143526b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 14360e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1437e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1438e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 14392cd08467SSteffen Klassert extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 14409fdc4883SSteffen Klassert extern int xfrm_init_replay(struct xfrm_state *x); 14411da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1442a454f0ccSWei Yongjun extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 144372cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1444227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1445716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1446716062fdSHerbert Xu int encap_type); 14471bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1448c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1449406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1450df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 145136cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1452227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1453c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1454c4541b41SHerbert Xu int encap_type); 1455716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14561da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1457c4541b41SHerbert Xu 1458c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1459c4541b41SHerbert Xu { 1460c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1461c4541b41SHerbert Xu } 1462c4541b41SHerbert Xu 146336cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 146436cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14651da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1466c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1467c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 146836cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1469227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 147033b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1471716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1472e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1473fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1474fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 147573d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 147673d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1477a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1478b71d1d42SEric Dumazet extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 147936cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 148036cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14811da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1482aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1483aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14841da177e4SLinus Torvalds 14851da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1486067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14871da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14881da177e4SLinus Torvalds #else 14891da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14901da177e4SLinus Torvalds { 14911da177e4SLinus Torvalds return -ENOPROTOOPT; 14921da177e4SLinus Torvalds } 14931da177e4SLinus Torvalds 1494067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14951da177e4SLinus Torvalds { 14961da177e4SLinus Torvalds /* should not happen */ 14971da177e4SLinus Torvalds kfree_skb(skb); 14981da177e4SLinus Torvalds return 0; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds #endif 15011da177e4SLinus Torvalds 15020331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15034c563f76STimo Teras 150412a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1505cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 15064c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 150712a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 15081da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15098ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15108ca2e93bSJamal Hadi Salim u8 type, int dir, 15114e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1512ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1513ef41aaa0SEric Paris int *err); 15148ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 151533ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 15161da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1517658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1518bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1519bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1520a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1521a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1522bd55775cSJamal Hadi Salim unsigned short family); 15231da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 15241da177e4SLinus Torvalds 152580c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1526183cad12SDavid S. Miller extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1527183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1528183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 152980c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 153080c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 153180c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1532b4b7c0b3SDavid S. Miller extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 153313c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 153413c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 153580c9abaaSShinta Sugimoto #endif 153680c9abaaSShinta Sugimoto 15375d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 15386c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1539db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 15401da177e4SLinus Torvalds 15411da177e4SLinus Torvalds extern void xfrm_input_init(void); 15426067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 15431da177e4SLinus Torvalds 15441da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 15451da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15461da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15471da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15481da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15491da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15501da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15511da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15526f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 15536f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 15546f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 15556f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 15561a6509d9SHerbert Xu int probe); 15571da177e4SLinus Torvalds 155807d4ee58SHerbert Xu struct hash_desc; 15599409f38aSHerbert Xu struct scatterlist; 156007d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 156107d4ee58SHerbert Xu unsigned int); 15621da177e4SLinus Torvalds 1563ff6acd16SDavid S. Miller static inline int xfrm_addr_cmp(const xfrm_address_t *a, 1564ff6acd16SDavid S. Miller const xfrm_address_t *b, 15651da177e4SLinus Torvalds int family) 15661da177e4SLinus Torvalds { 15671da177e4SLinus Torvalds switch (family) { 15681da177e4SLinus Torvalds default: 15691da177e4SLinus Torvalds case AF_INET: 1570a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15711da177e4SLinus Torvalds case AF_INET6: 1572b71d1d42SEric Dumazet return ipv6_addr_cmp((const struct in6_addr *)a, 1573b71d1d42SEric Dumazet (const struct in6_addr *)b); 15741da177e4SLinus Torvalds } 15751da177e4SLinus Torvalds } 15761da177e4SLinus Torvalds 157777d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 157877d8d7a6SHerbert Xu { 157977d8d7a6SHerbert Xu return index & 7; 158077d8d7a6SHerbert Xu } 158177d8d7a6SHerbert Xu 1582a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1583a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1584f8cd5488SJamal Hadi Salim { 1585be33690dSPatrick McHardy struct sock *nlsk; 1586be33690dSPatrick McHardy int ret = 0; 1587be33690dSPatrick McHardy 1588be33690dSPatrick McHardy rcu_read_lock(); 1589a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1590be33690dSPatrick McHardy if (nlsk) 1591be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1592be33690dSPatrick McHardy rcu_read_unlock(); 1593be33690dSPatrick McHardy return ret; 1594f8cd5488SJamal Hadi Salim } 1595a6483b79SAlexey Dobriyan #endif 1596f8cd5488SJamal Hadi Salim 159785158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 15980f99be0dSEric Dumazet { 15990f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16000f99be0dSEric Dumazet } 16010f99be0dSEric Dumazet 160285158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 16034447bb33SMartin Willi { 16044447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16054447bb33SMartin Willi } 16064447bb33SMartin Willi 16079736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 16089736acf3SSteffen Klassert { 16099736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 16109736acf3SSteffen Klassert } 16119736acf3SSteffen Klassert 161280c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1613af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1614af2f464eSSteffen Klassert struct xfrm_state *orig) 1615af2f464eSSteffen Klassert { 1616af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1617af2f464eSSteffen Klassert GFP_KERNEL); 1618af2f464eSSteffen Klassert if (!x->replay_esn) 1619af2f464eSSteffen Klassert return -ENOMEM; 1620af2f464eSSteffen Klassert 1621af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1622af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1623af2f464eSSteffen Klassert 1624af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1625af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1626af2f464eSSteffen Klassert GFP_KERNEL); 1627af2f464eSSteffen Klassert if (!x->preplay_esn) { 1628af2f464eSSteffen Klassert kfree(x->replay_esn); 1629af2f464eSSteffen Klassert return -ENOMEM; 1630af2f464eSSteffen Klassert } 1631af2f464eSSteffen Klassert 1632af2f464eSSteffen Klassert return 0; 1633af2f464eSSteffen Klassert } 1634af2f464eSSteffen Klassert 163580c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 163680c9abaaSShinta Sugimoto { 16370f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 163880c9abaaSShinta Sugimoto } 163980c9abaaSShinta Sugimoto 16404447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 16414447bb33SMartin Willi { 16424447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 16434447bb33SMartin Willi } 16444447bb33SMartin Willi 164580c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 164680c9abaaSShinta Sugimoto { 164780c9abaaSShinta Sugimoto int i; 164880c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 164980c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 165080c9abaaSShinta Sugimoto } 165180c9abaaSShinta Sugimoto 165280c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 165380c9abaaSShinta Sugimoto { 165480c9abaaSShinta Sugimoto int i; 165580c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 165680c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 165780c9abaaSShinta Sugimoto } 165880c9abaaSShinta Sugimoto #endif 1659f8cd5488SJamal Hadi Salim 1660def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 166100501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 166200501121SHerbert Xu { 166300501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 166400501121SHerbert Xu } 1665def8b4faSAlexey Dobriyan #endif 166600501121SHerbert Xu 1667bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1668bf825f81SJamal Hadi Salim { 1669bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 16704efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1671bf825f81SJamal Hadi Salim else 1672bf825f81SJamal Hadi Salim m->v = m->m = 0; 1673bf825f81SJamal Hadi Salim 1674bf825f81SJamal Hadi Salim return m->v & m->m; 1675bf825f81SJamal Hadi Salim } 1676bf825f81SJamal Hadi Salim 1677e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1678bf825f81SJamal Hadi Salim { 1679bf825f81SJamal Hadi Salim if (m->m | m->v) 1680bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1681bf825f81SJamal Hadi Salim return 0; 1682bf825f81SJamal Hadi Salim 1683bf825f81SJamal Hadi Salim nla_put_failure: 1684bf825f81SJamal Hadi Salim return -1; 1685bf825f81SJamal Hadi Salim } 1686bf825f81SJamal Hadi Salim 16871da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1688