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 9601da177e4SLinus Torvalds static inline struct sec_path * 9611da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9621da177e4SLinus Torvalds { 9631da177e4SLinus Torvalds if (sp) 9641da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9651da177e4SLinus Torvalds return sp; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds static inline void 9711da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9721da177e4SLinus Torvalds { 9731da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9741da177e4SLinus Torvalds __secpath_destroy(sp); 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds static inline void 9801da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9811da177e4SLinus Torvalds { 9821da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9831da177e4SLinus Torvalds secpath_put(skb->sp); 9841da177e4SLinus Torvalds skb->sp = NULL; 9851da177e4SLinus Torvalds #endif 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds static inline int 9896cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 990a1e59abfSPatrick McHardy { 991a1e59abfSPatrick McHardy switch (family) { 992a1e59abfSPatrick McHardy case AF_INET: 993a1e59abfSPatrick McHardy return addr->a4 == 0; 994a1e59abfSPatrick McHardy case AF_INET6: 995a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 996a1e59abfSPatrick McHardy } 997a1e59abfSPatrick McHardy return 0; 998a1e59abfSPatrick McHardy } 999a1e59abfSPatrick McHardy 1000a1e59abfSPatrick McHardy static inline int 100121eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10021da177e4SLinus Torvalds { 10031da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10041da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds 10071da177e4SLinus Torvalds static inline int 100821eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10091da177e4SLinus Torvalds { 10101da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 10111da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds static inline int 101521eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10161da177e4SLinus Torvalds { 10171da177e4SLinus Torvalds switch (family) { 10181da177e4SLinus Torvalds case AF_INET: 10191da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10201da177e4SLinus Torvalds case AF_INET6: 10211da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10221da177e4SLinus Torvalds } 10231da177e4SLinus Torvalds return !0; 10241da177e4SLinus Torvalds } 10251da177e4SLinus Torvalds 10261da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10271da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 10281da177e4SLinus Torvalds 1029d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1030d5422efeSHerbert Xu struct sk_buff *skb, 1031d5422efeSHerbert Xu unsigned int family, int reverse) 10321da177e4SLinus Torvalds { 1033f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1034d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1035d5422efeSHerbert Xu 10361da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1037d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10381da177e4SLinus Torvalds 1039f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1040adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1041d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1042d5422efeSHerbert Xu } 1043d5422efeSHerbert Xu 1044d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1045d5422efeSHerbert Xu { 1046d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10551da177e4SLinus Torvalds { 10561da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 1059d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1060d5422efeSHerbert Xu struct sk_buff *skb) 1061d5422efeSHerbert Xu { 1062d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1063d5422efeSHerbert Xu } 1064d5422efeSHerbert Xu 1065d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1066d5422efeSHerbert Xu struct sk_buff *skb) 1067d5422efeSHerbert Xu { 1068d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1069d5422efeSHerbert Xu } 1070d5422efeSHerbert Xu 1071d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1072d5422efeSHerbert Xu unsigned int family, int reverse); 1073d5422efeSHerbert Xu 1074d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1075d5422efeSHerbert Xu unsigned int family) 1076d5422efeSHerbert Xu { 1077d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1078d5422efeSHerbert Xu } 1079d5422efeSHerbert Xu 1080d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1081d5422efeSHerbert Xu struct flowi *fl, 1082d5422efeSHerbert Xu unsigned int family) 1083d5422efeSHerbert Xu { 1084d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1085d5422efeSHerbert Xu } 1086d5422efeSHerbert Xu 10871da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10901da177e4SLinus Torvalds { 109199a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 109299a66657SAlexey Dobriyan 109399a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1094adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 10951da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11041da177e4SLinus Torvalds { 11051da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11061da177e4SLinus Torvalds } 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 11111da177e4SLinus Torvalds { 11121da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 11131da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 11141da177e4SLinus Torvalds return 0; 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds 11174666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11181da177e4SLinus Torvalds 11191da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11201da177e4SLinus Torvalds { 11211da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 11221da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 11231da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 11261da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11271da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds #else 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11341da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11351da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11361da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11371da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11381da177e4SLinus Torvalds { 11391da177e4SLinus Torvalds return 1; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds return 1; 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11461da177e4SLinus Torvalds { 11471da177e4SLinus Torvalds return 1; 11481da177e4SLinus Torvalds } 1149d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1150d5422efeSHerbert Xu struct flowi *fl, 1151d5422efeSHerbert Xu unsigned int family) 1152d5422efeSHerbert Xu { 1153d5422efeSHerbert Xu return -ENOSYS; 1154d5422efeSHerbert Xu } 1155d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1156d5422efeSHerbert Xu struct sk_buff *skb) 1157d5422efeSHerbert Xu { 1158d5422efeSHerbert Xu return 1; 1159d5422efeSHerbert Xu } 1160d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1161d5422efeSHerbert Xu struct sk_buff *skb) 1162d5422efeSHerbert Xu { 1163d5422efeSHerbert Xu return 1; 1164d5422efeSHerbert Xu } 11651da177e4SLinus Torvalds #endif 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds static __inline__ 1168e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11691da177e4SLinus Torvalds { 11701da177e4SLinus Torvalds switch (family){ 11711da177e4SLinus Torvalds case AF_INET: 11727e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 11731da177e4SLinus Torvalds case AF_INET6: 11747e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 11751da177e4SLinus Torvalds } 11761da177e4SLinus Torvalds return NULL; 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds static __inline__ 1180e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 11811da177e4SLinus Torvalds { 11821da177e4SLinus Torvalds switch (family){ 11831da177e4SLinus Torvalds case AF_INET: 11847e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 11851da177e4SLinus Torvalds case AF_INET6: 11867e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 11871da177e4SLinus Torvalds } 11881da177e4SLinus Torvalds return NULL; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11919bb182a7SYOSHIFUJI Hideaki static __inline__ 1192e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 11939bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11949bb182a7SYOSHIFUJI Hideaki unsigned short family) 11959bb182a7SYOSHIFUJI Hideaki { 11969bb182a7SYOSHIFUJI Hideaki switch(family) { 11979bb182a7SYOSHIFUJI Hideaki case AF_INET: 11987e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 11997e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12009bb182a7SYOSHIFUJI Hideaki break; 12019bb182a7SYOSHIFUJI Hideaki case AF_INET6: 12027e1dc7b6SDavid S. Miller ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->u.ip6.saddr); 12037e1dc7b6SDavid S. Miller ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->u.ip6.daddr); 12049bb182a7SYOSHIFUJI Hideaki break; 12059bb182a7SYOSHIFUJI Hideaki } 12069bb182a7SYOSHIFUJI Hideaki } 12079bb182a7SYOSHIFUJI Hideaki 12081da177e4SLinus Torvalds static __inline__ int 1209f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1210f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12111da177e4SLinus Torvalds { 12121da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12131da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12141da177e4SLinus Torvalds return 1; 12151da177e4SLinus Torvalds return 0; 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds 12181da177e4SLinus Torvalds static __inline__ int 1219f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1220f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12211da177e4SLinus Torvalds { 12221da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 12231da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 12241da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12251da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12261da177e4SLinus Torvalds return 1; 12271da177e4SLinus Torvalds return 0; 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds static __inline__ int 1231f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1232f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12331da177e4SLinus Torvalds unsigned short family) 12341da177e4SLinus Torvalds { 12351da177e4SLinus Torvalds switch (family) { 12361da177e4SLinus Torvalds case AF_INET: 12371da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12381da177e4SLinus Torvalds case AF_INET6: 12391da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12401da177e4SLinus Torvalds } 12411da177e4SLinus Torvalds return 0; 12421da177e4SLinus Torvalds } 12431da177e4SLinus Torvalds 1244e53820deSMasahide NAKAMURA static __inline__ int 1245f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1246e53820deSMasahide NAKAMURA unsigned short family) 1247e53820deSMasahide NAKAMURA { 1248e53820deSMasahide NAKAMURA switch (family) { 1249e53820deSMasahide NAKAMURA case AF_INET: 1250e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12517e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12527e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1253e53820deSMasahide NAKAMURA case AF_INET6: 1254e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12557e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 12567e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1257e53820deSMasahide NAKAMURA } 1258e53820deSMasahide NAKAMURA return 0; 1259e53820deSMasahide NAKAMURA } 1260e53820deSMasahide NAKAMURA 1261f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 12621da177e4SLinus Torvalds { 12631da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds 12665794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12675794708fSMasahide NAKAMURA { 1268dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1269dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1270dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1271dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12725794708fSMasahide NAKAMURA } 12735794708fSMasahide NAKAMURA 12741da177e4SLinus Torvalds /* 12751da177e4SLinus Torvalds * xfrm algorithm information 12761da177e4SLinus Torvalds */ 12771a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12781a6509d9SHerbert Xu u16 icv_truncbits; 12791a6509d9SHerbert Xu }; 12801a6509d9SHerbert Xu 12811da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12821da177e4SLinus Torvalds u16 icv_truncbits; 12831da177e4SLinus Torvalds u16 icv_fullbits; 12841da177e4SLinus Torvalds }; 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12871da177e4SLinus Torvalds u16 blockbits; 12881da177e4SLinus Torvalds u16 defkeybits; 12891da177e4SLinus Torvalds }; 12901da177e4SLinus Torvalds 12911da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12921da177e4SLinus Torvalds u16 threshold; 12931da177e4SLinus Torvalds }; 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds struct xfrm_algo_desc { 12961da177e4SLinus Torvalds char *name; 129704ff1260SHerbert Xu char *compat; 12981da177e4SLinus Torvalds u8 available:1; 12991da177e4SLinus Torvalds union { 13001a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13011da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13021da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13031da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13041da177e4SLinus Torvalds } uinfo; 13051da177e4SLinus Torvalds struct sadb_alg desc; 13061da177e4SLinus Torvalds }; 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13091da177e4SLinus Torvalds struct xfrm_tunnel { 13101da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1311a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1312d2acc347SHerbert Xu 1313b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1314d2acc347SHerbert Xu int priority; 13151da177e4SLinus Torvalds }; 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds struct xfrm6_tunnel { 1318d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1319d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1320d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13216f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1322d2acc347SHerbert Xu int priority; 13231da177e4SLinus Torvalds }; 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds extern void xfrm_init(void); 1326a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1327d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1328d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 13291da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1330c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1331c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1332c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 13330013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 13341da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1335c35b7e72SDaniel Lezcano #else 1336c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1337c35b7e72SDaniel Lezcano { 1338c35b7e72SDaniel Lezcano return 0; 1339c35b7e72SDaniel Lezcano } 1340c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1341c35b7e72SDaniel Lezcano { 1342c35b7e72SDaniel Lezcano ; 1343c35b7e72SDaniel Lezcano } 1344c35b7e72SDaniel Lezcano #endif 13451da177e4SLinus Torvalds 1346558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1347c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1348c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1349558f82efSMasahide NAKAMURA #endif 1350558f82efSMasahide NAKAMURA 1351b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1352b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1353b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1354b27aeadbSAlexey Dobriyan #else 1355b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1356b27aeadbSAlexey Dobriyan { 1357b27aeadbSAlexey Dobriyan } 1358b27aeadbSAlexey Dobriyan #endif 1359b27aeadbSAlexey Dobriyan 13605c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1361284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13624c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1363abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1364673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 136533765d06SDavid S. Miller extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 136633765d06SDavid S. Miller const xfrm_address_t *saddr, 1367b520e9f6SDavid S. Miller const struct flowi *fl, 1368b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 13691da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13701da177e4SLinus Torvalds unsigned short family); 1371bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13725447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1373628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1374628529b6SJamal Hadi Salim unsigned short family, 1375628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13761da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13771da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13781da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13791da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1380bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1381a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1382bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1383bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1384a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1385a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1386bd55775cSJamal Hadi Salim u8 proto, 1387bd55775cSJamal Hadi Salim unsigned short family); 138841a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 138941a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 139041a49cc3SMasahide NAKAMURA int n, unsigned short family); 139141a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 139241a49cc3SMasahide NAKAMURA int n, unsigned short family); 139341a49cc3SMasahide NAKAMURA #else 139441a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 139541a49cc3SMasahide NAKAMURA int n, unsigned short family) 139641a49cc3SMasahide NAKAMURA { 139741a49cc3SMasahide NAKAMURA return -ENOSYS; 139841a49cc3SMasahide NAKAMURA } 139941a49cc3SMasahide NAKAMURA 140041a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 140141a49cc3SMasahide NAKAMURA int n, unsigned short family) 140241a49cc3SMasahide NAKAMURA { 140341a49cc3SMasahide NAKAMURA return -ENOSYS; 140441a49cc3SMasahide NAKAMURA } 140541a49cc3SMasahide NAKAMURA #endif 1406af11e316SJamal Hadi Salim 1407af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1408af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1409af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1410af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1411af11e316SJamal Hadi Salim }; 1412af11e316SJamal Hadi Salim 14135a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14145a6d3416SJamal Hadi Salim u32 incnt; 14155a6d3416SJamal Hadi Salim u32 outcnt; 14165a6d3416SJamal Hadi Salim u32 fwdcnt; 14175a6d3416SJamal Hadi Salim u32 inscnt; 14185a6d3416SJamal Hadi Salim u32 outscnt; 14195a6d3416SJamal Hadi Salim u32 fwdscnt; 14205a6d3416SJamal Hadi Salim u32 spdhcnt; 14215a6d3416SJamal Hadi Salim u32 spdhmcnt; 14225a6d3416SJamal Hadi Salim }; 14235a6d3416SJamal Hadi Salim 1424bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1425bd55775cSJamal Hadi Salim u32 seq); 142626b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 14270e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1428e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1429e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 14302cd08467SSteffen Klassert extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 14319fdc4883SSteffen Klassert extern int xfrm_init_replay(struct xfrm_state *x); 14321da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1433a454f0ccSWei Yongjun extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 143472cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1435227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1436716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1437716062fdSHerbert Xu int encap_type); 14381bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1439c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1440406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1441df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 144236cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1443227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1444c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1445c4541b41SHerbert Xu int encap_type); 1446716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14471da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1448c4541b41SHerbert Xu 1449c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1450c4541b41SHerbert Xu { 1451c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1452c4541b41SHerbert Xu } 1453c4541b41SHerbert Xu 145436cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 145536cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14561da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1457c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1458c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 145936cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1460227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 146133b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1462716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1463e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1464fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1465fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 146673d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 146773d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1468a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1469a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); 147036cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 147136cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14721da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1473aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1474aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1477067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14781da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14791da177e4SLinus Torvalds #else 14801da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14811da177e4SLinus Torvalds { 14821da177e4SLinus Torvalds return -ENOPROTOOPT; 14831da177e4SLinus Torvalds } 14841da177e4SLinus Torvalds 1485067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14861da177e4SLinus Torvalds { 14871da177e4SLinus Torvalds /* should not happen */ 14881da177e4SLinus Torvalds kfree_skb(skb); 14891da177e4SLinus Torvalds return 0; 14901da177e4SLinus Torvalds } 14911da177e4SLinus Torvalds #endif 14921da177e4SLinus Torvalds 14930331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14944c563f76STimo Teras 149512a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1496cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14974c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 149812a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14991da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15008ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15018ca2e93bSJamal Hadi Salim u8 type, int dir, 15024e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1503ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1504ef41aaa0SEric Paris int *err); 15058ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 150633ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 15071da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1508658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1509bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1510bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1511a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1512a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1513bd55775cSJamal Hadi Salim unsigned short family); 15141da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 15151da177e4SLinus Torvalds 151680c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1517183cad12SDavid S. Miller extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1518183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1519183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 152080c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 152180c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 152280c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1523b4b7c0b3SDavid S. Miller extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 152413c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 152513c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 152680c9abaaSShinta Sugimoto #endif 152780c9abaaSShinta Sugimoto 15285d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 15296c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1530db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 15311da177e4SLinus Torvalds 15321da177e4SLinus Torvalds extern void xfrm_input_init(void); 15336067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 15361da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15371da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15381da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15391da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15401da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15411da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15421da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15436f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 15446f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 15456f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 15466f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 15471a6509d9SHerbert Xu int probe); 15481da177e4SLinus Torvalds 154907d4ee58SHerbert Xu struct hash_desc; 15509409f38aSHerbert Xu struct scatterlist; 155107d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 155207d4ee58SHerbert Xu unsigned int); 15531da177e4SLinus Torvalds 1554ff6acd16SDavid S. Miller static inline int xfrm_addr_cmp(const xfrm_address_t *a, 1555ff6acd16SDavid S. Miller const xfrm_address_t *b, 15561da177e4SLinus Torvalds int family) 15571da177e4SLinus Torvalds { 15581da177e4SLinus Torvalds switch (family) { 15591da177e4SLinus Torvalds default: 15601da177e4SLinus Torvalds case AF_INET: 1561a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15621da177e4SLinus Torvalds case AF_INET6: 15631da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15641da177e4SLinus Torvalds (struct in6_addr *)b); 15651da177e4SLinus Torvalds } 15661da177e4SLinus Torvalds } 15671da177e4SLinus Torvalds 156877d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 156977d8d7a6SHerbert Xu { 157077d8d7a6SHerbert Xu return index & 7; 157177d8d7a6SHerbert Xu } 157277d8d7a6SHerbert Xu 1573a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1574a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1575f8cd5488SJamal Hadi Salim { 1576be33690dSPatrick McHardy struct sock *nlsk; 1577be33690dSPatrick McHardy int ret = 0; 1578be33690dSPatrick McHardy 1579be33690dSPatrick McHardy rcu_read_lock(); 1580a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1581be33690dSPatrick McHardy if (nlsk) 1582be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1583be33690dSPatrick McHardy rcu_read_unlock(); 1584be33690dSPatrick McHardy return ret; 1585f8cd5488SJamal Hadi Salim } 1586a6483b79SAlexey Dobriyan #endif 1587f8cd5488SJamal Hadi Salim 158885158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 15890f99be0dSEric Dumazet { 15900f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15910f99be0dSEric Dumazet } 15920f99be0dSEric Dumazet 159385158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 15944447bb33SMartin Willi { 15954447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15964447bb33SMartin Willi } 15974447bb33SMartin Willi 15989736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 15999736acf3SSteffen Klassert { 16009736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 16019736acf3SSteffen Klassert } 16029736acf3SSteffen Klassert 160380c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1604af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1605af2f464eSSteffen Klassert struct xfrm_state *orig) 1606af2f464eSSteffen Klassert { 1607af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1608af2f464eSSteffen Klassert GFP_KERNEL); 1609af2f464eSSteffen Klassert if (!x->replay_esn) 1610af2f464eSSteffen Klassert return -ENOMEM; 1611af2f464eSSteffen Klassert 1612af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1613af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1614af2f464eSSteffen Klassert 1615af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1616af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1617af2f464eSSteffen Klassert GFP_KERNEL); 1618af2f464eSSteffen Klassert if (!x->preplay_esn) { 1619af2f464eSSteffen Klassert kfree(x->replay_esn); 1620af2f464eSSteffen Klassert return -ENOMEM; 1621af2f464eSSteffen Klassert } 1622af2f464eSSteffen Klassert 1623af2f464eSSteffen Klassert return 0; 1624af2f464eSSteffen Klassert } 1625af2f464eSSteffen Klassert 162680c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 162780c9abaaSShinta Sugimoto { 16280f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 162980c9abaaSShinta Sugimoto } 163080c9abaaSShinta Sugimoto 16314447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 16324447bb33SMartin Willi { 16334447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 16344447bb33SMartin Willi } 16354447bb33SMartin Willi 163680c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 163780c9abaaSShinta Sugimoto { 163880c9abaaSShinta Sugimoto int i; 163980c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 164080c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 164180c9abaaSShinta Sugimoto } 164280c9abaaSShinta Sugimoto 164380c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 164480c9abaaSShinta Sugimoto { 164580c9abaaSShinta Sugimoto int i; 164680c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 164780c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 164880c9abaaSShinta Sugimoto } 164980c9abaaSShinta Sugimoto #endif 1650f8cd5488SJamal Hadi Salim 1651def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 165200501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 165300501121SHerbert Xu { 165400501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 165500501121SHerbert Xu } 1656def8b4faSAlexey Dobriyan #endif 165700501121SHerbert Xu 1658bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1659bf825f81SJamal Hadi Salim { 1660bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 16614efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1662bf825f81SJamal Hadi Salim else 1663bf825f81SJamal Hadi Salim m->v = m->m = 0; 1664bf825f81SJamal Hadi Salim 1665bf825f81SJamal Hadi Salim return m->v & m->m; 1666bf825f81SJamal Hadi Salim } 1667bf825f81SJamal Hadi Salim 1668e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1669bf825f81SJamal Hadi Salim { 1670bf825f81SJamal Hadi Salim if (m->m | m->v) 1671bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1672bf825f81SJamal Hadi Salim return 0; 1673bf825f81SJamal Hadi Salim 1674bf825f81SJamal Hadi Salim nla_put_failure: 1675bf825f81SJamal Hadi Salim return -1; 1676bf825f81SJamal Hadi Salim } 1677bf825f81SJamal Hadi Salim 16781da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1679