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); 32743a4dea4SSteffen Klassert int (*output_finish)(struct sk_buff *skb); 328227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 329227620e2SHerbert Xu struct sk_buff *skb); 33036cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 33136cf9acfSHerbert Xu struct sk_buff *skb); 332716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 333716062fdSHerbert Xu int async); 3341da177e4SLinus Torvalds }; 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3371da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3401da177e4SLinus Torvalds 341fd2c3ef7SEric Dumazet struct xfrm_type { 3421da177e4SLinus Torvalds char *description; 3431da177e4SLinus Torvalds struct module *owner; 344a6337463Sjamal u8 proto; 345a6337463Sjamal u8 flags; 3461b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 347436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 348f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 349f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3501da177e4SLinus Torvalds 35172cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3521da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 353e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3541da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3558f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3568f029de2SDavid S. Miller const struct flowi *); 357aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3581da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 359c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3601da177e4SLinus Torvalds }; 3611da177e4SLinus Torvalds 362533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 363533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3641da177e4SLinus Torvalds 365b59f45d0SHerbert Xu struct xfrm_mode { 366227620e2SHerbert Xu /* 367227620e2SHerbert Xu * Remove encapsulation header. 368227620e2SHerbert Xu * 369227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 370227620e2SHerbert Xu * header. 371227620e2SHerbert Xu * 372227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 373227620e2SHerbert Xu * should be and the network header shall be set to where the IP 374227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 375227620e2SHerbert Xu * payload. 376227620e2SHerbert Xu */ 377227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 378227620e2SHerbert Xu 379227620e2SHerbert Xu /* 380227620e2SHerbert Xu * This is the actual input entry point. 381227620e2SHerbert Xu * 382227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 383227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 384227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 385227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 386227620e2SHerbert Xu */ 387b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 38837fedd3aSHerbert Xu 38937fedd3aSHerbert Xu /* 39037fedd3aSHerbert Xu * Add encapsulation header. 39137fedd3aSHerbert Xu * 39237fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 39337fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 39437fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 39537fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 39637fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 39737fedd3aSHerbert Xu * header. The value of the network header will always point 39837fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 39937fedd3aSHerbert Xu */ 40036cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 40136cf9acfSHerbert Xu 40236cf9acfSHerbert Xu /* 40336cf9acfSHerbert Xu * This is the actual output entry point. 40436cf9acfSHerbert Xu * 40536cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 40636cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 40736cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 40836cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 40936cf9acfSHerbert Xu * call output2. 41036cf9acfSHerbert Xu */ 411eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 412b59f45d0SHerbert Xu 41317c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 414b59f45d0SHerbert Xu struct module *owner; 415b59f45d0SHerbert Xu unsigned int encap; 4161bfcb10fSHerbert Xu int flags; 4171bfcb10fSHerbert Xu }; 4181bfcb10fSHerbert Xu 4191bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4201bfcb10fSHerbert Xu enum { 4211bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 422b59f45d0SHerbert Xu }; 423b59f45d0SHerbert Xu 424b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 425b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 426b59f45d0SHerbert Xu 427df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 428df9dcb45SKazunori MIYAZAWA { 429df9dcb45SKazunori MIYAZAWA switch(family) { 430df9dcb45SKazunori MIYAZAWA case AF_INET: 431df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 432df9dcb45SKazunori MIYAZAWA case AF_INET6: 433df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 434df9dcb45SKazunori MIYAZAWA default: 435df9dcb45SKazunori MIYAZAWA return 0; 436df9dcb45SKazunori MIYAZAWA } 437df9dcb45SKazunori MIYAZAWA } 438df9dcb45SKazunori MIYAZAWA 439df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 440df9dcb45SKazunori MIYAZAWA { 441df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 442df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 443df9dcb45SKazunori MIYAZAWA return x->inner_mode; 444df9dcb45SKazunori MIYAZAWA else 445df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 446df9dcb45SKazunori MIYAZAWA } 447df9dcb45SKazunori MIYAZAWA 448fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4491da177e4SLinus Torvalds /* id in template is interpreted as: 4501da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4511da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4521da177e4SLinus Torvalds * daddr must be fixed too. 4531da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4541da177e4SLinus Torvalds */ 4551da177e4SLinus Torvalds struct xfrm_id id; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4581da177e4SLinus Torvalds xfrm_address_t saddr; 4591da177e4SLinus Torvalds 46076b3f055SMiika Komu unsigned short encap_family; 46176b3f055SMiika Komu 462a6337463Sjamal u32 reqid; 4631da177e4SLinus Torvalds 4647e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 465a6337463Sjamal u8 mode; 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 468a6337463Sjamal u8 share; 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 471a6337463Sjamal u8 optional; 4721da177e4SLinus Torvalds 473c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 474a6337463Sjamal u8 allalgs; 475c5d18e98SHerbert Xu 4761da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 477a6337463Sjamal u32 aalgos; 478a6337463Sjamal u32 ealgos; 479a6337463Sjamal u32 calgos; 4801da177e4SLinus Torvalds }; 4811da177e4SLinus Torvalds 482622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4831da177e4SLinus Torvalds 48412a169e7SHerbert Xu struct xfrm_policy_walk_entry { 48512a169e7SHerbert Xu struct list_head all; 48612a169e7SHerbert Xu u8 dead; 48712a169e7SHerbert Xu }; 48812a169e7SHerbert Xu 48912a169e7SHerbert Xu struct xfrm_policy_walk { 49012a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49112a169e7SHerbert Xu u8 type; 49212a169e7SHerbert Xu u32 seq; 49312a169e7SHerbert Xu }; 49412a169e7SHerbert Xu 495fd2c3ef7SEric Dumazet struct xfrm_policy { 4960331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4970331b1f3SAlexey Dobriyan struct net *xp_net; 4980331b1f3SAlexey Dobriyan #endif 4992518c7c2SDavid S. Miller struct hlist_node bydst; 5002518c7c2SDavid S. Miller struct hlist_node byidx; 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5031da177e4SLinus Torvalds rwlock_t lock; 5041da177e4SLinus Torvalds atomic_t refcnt; 5051da177e4SLinus Torvalds struct timer_list timer; 5061da177e4SLinus Torvalds 507fe1a5f03STimo Teräs struct flow_cache_object flo; 50880c802f3STimo Teräs atomic_t genid; 5091da177e4SLinus Torvalds u32 priority; 5101da177e4SLinus Torvalds u32 index; 511bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5121da177e4SLinus Torvalds struct xfrm_selector selector; 5131da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5141da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 51512a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 51646ca5f5dSArnaldo Carvalho de Melo u8 type; 51746ca5f5dSArnaldo Carvalho de Melo u8 action; 51846ca5f5dSArnaldo Carvalho de Melo u8 flags; 51946ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 52012a169e7SHerbert Xu u16 family; 521df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5221da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5231da177e4SLinus Torvalds }; 5241da177e4SLinus Torvalds 52563eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5260331b1f3SAlexey Dobriyan { 5270331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5280331b1f3SAlexey Dobriyan } 5290331b1f3SAlexey Dobriyan 53013c1d189SArnaud Ebalard struct xfrm_kmaddress { 53113c1d189SArnaud Ebalard xfrm_address_t local; 53213c1d189SArnaud Ebalard xfrm_address_t remote; 53313c1d189SArnaud Ebalard u32 reserved; 53413c1d189SArnaud Ebalard u16 family; 53513c1d189SArnaud Ebalard }; 53613c1d189SArnaud Ebalard 53780c9abaaSShinta Sugimoto struct xfrm_migrate { 53880c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 53980c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 54080c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 54180c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 54280c9abaaSShinta Sugimoto u8 proto; 54380c9abaaSShinta Sugimoto u8 mode; 54480c9abaaSShinta Sugimoto u16 reserved; 54580c9abaaSShinta Sugimoto u32 reqid; 54680c9abaaSShinta Sugimoto u16 old_family; 54780c9abaaSShinta Sugimoto u16 new_family; 54880c9abaaSShinta Sugimoto }; 54980c9abaaSShinta Sugimoto 5501da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 551f8cd5488SJamal Hadi Salim /* which seqno */ 552f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 553f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 554f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 555f8cd5488SJamal Hadi Salim /* what happened */ 556f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 557f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 558f8cd5488SJamal Hadi Salim 559f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 560f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 561f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 562f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 563f8cd5488SJamal Hadi Salim /* default seq threshold size */ 564f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5651da177e4SLinus Torvalds 566fd2c3ef7SEric Dumazet struct xfrm_mgr { 5671da177e4SLinus Torvalds struct list_head list; 5681da177e4SLinus Torvalds char *id; 569214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 5701da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 571cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5725d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 573214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 574db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 575183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 576183cad12SDavid S. Miller u8 dir, u8 type, 577183cad12SDavid S. Miller const struct xfrm_migrate *m, 578183cad12SDavid S. Miller int num_bundles, 579183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 5801da177e4SLinus Torvalds }; 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5831da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5841da177e4SLinus Torvalds 585436a0a40SHerbert Xu /* 586436a0a40SHerbert Xu * This structure is used for the duration where packets are being 587436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 588436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 589436a0a40SHerbert Xu */ 590436a0a40SHerbert Xu struct xfrm_skb_cb { 591436a0a40SHerbert Xu union { 592436a0a40SHerbert Xu struct inet_skb_parm h4; 593436a0a40SHerbert Xu struct inet6_skb_parm h6; 594436a0a40SHerbert Xu } header; 595436a0a40SHerbert Xu 596436a0a40SHerbert Xu /* Sequence number for replay protection. */ 597b318e0e4SHerbert Xu union { 5981ce3644aSSteffen Klassert struct { 5991ce3644aSSteffen Klassert __u32 low; 6001ce3644aSSteffen Klassert __u32 hi; 6011ce3644aSSteffen Klassert } output; 6021ce3644aSSteffen Klassert struct { 6031ce3644aSSteffen Klassert __be32 low; 6041ce3644aSSteffen Klassert __be32 hi; 6051ce3644aSSteffen Klassert } input; 606b318e0e4SHerbert Xu } seq; 607436a0a40SHerbert Xu }; 608436a0a40SHerbert Xu 609436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 610436a0a40SHerbert Xu 61136cf9acfSHerbert Xu /* 61236cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 61336cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 61436cf9acfSHerbert Xu */ 61536cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 61636cf9acfSHerbert Xu union { 61736cf9acfSHerbert Xu struct inet_skb_parm h4; 61836cf9acfSHerbert Xu struct inet6_skb_parm h6; 61936cf9acfSHerbert Xu } header; 62036cf9acfSHerbert Xu 62136cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 62236cf9acfSHerbert Xu __be16 id; 62336cf9acfSHerbert Xu __be16 frag_off; 62436cf9acfSHerbert Xu 625732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 626732c8bd5SHerbert Xu u8 ihl; 627732c8bd5SHerbert Xu 62836cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 62936cf9acfSHerbert Xu u8 tos; 63036cf9acfSHerbert Xu 63136cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 63236cf9acfSHerbert Xu u8 ttl; 63336cf9acfSHerbert Xu 63436cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 63536cf9acfSHerbert Xu u8 protocol; 63636cf9acfSHerbert Xu 637732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 638732c8bd5SHerbert Xu u8 optlen; 639732c8bd5SHerbert Xu 64036cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 64136cf9acfSHerbert Xu u8 flow_lbl[3]; 64236cf9acfSHerbert Xu }; 64336cf9acfSHerbert Xu 64436cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 64536cf9acfSHerbert Xu 646716062fdSHerbert Xu /* 647716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 648716062fdSHerbert Xu * related information. 649716062fdSHerbert Xu */ 650716062fdSHerbert Xu struct xfrm_spi_skb_cb { 651716062fdSHerbert Xu union { 652716062fdSHerbert Xu struct inet_skb_parm h4; 653716062fdSHerbert Xu struct inet6_skb_parm h6; 654716062fdSHerbert Xu } header; 655716062fdSHerbert Xu 656716062fdSHerbert Xu unsigned int daddroff; 6572fcb45b6SHerbert Xu unsigned int family; 658716062fdSHerbert Xu }; 659716062fdSHerbert Xu 660716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 661716062fdSHerbert Xu 662161a09e7SJoy Latten /* Audit Information */ 663fd2c3ef7SEric Dumazet struct xfrm_audit { 664161a09e7SJoy Latten u32 secid; 6652532386fSEric Paris uid_t loginuid; 6662532386fSEric Paris u32 sessionid; 667161a09e7SJoy Latten }; 668c9204d9cSJoy Latten 669c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 670afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 671ab5f5e8bSJoy Latten { 672ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 673ab5f5e8bSJoy Latten 674afeb14b4SPaul Moore if (audit_enabled == 0) 675afeb14b4SPaul Moore return NULL; 676ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 677ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 678ab5f5e8bSJoy Latten if (audit_buf == NULL) 679ab5f5e8bSJoy Latten return NULL; 680afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 681afeb14b4SPaul Moore return audit_buf; 682afeb14b4SPaul Moore } 683afeb14b4SPaul Moore 6842532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 685afeb14b4SPaul Moore struct audit_buffer *audit_buf) 686afeb14b4SPaul Moore { 687afeb14b4SPaul Moore char *secctx; 688afeb14b4SPaul Moore u32 secctx_len; 689ab5f5e8bSJoy Latten 6902532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 69168277accSPaul Moore if (secid != 0 && 69268277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 693ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 694ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 695ab5f5e8bSJoy Latten } else 696ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 697ab5f5e8bSJoy Latten } 698ab5f5e8bSJoy Latten 699ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7002532386fSEric Paris u32 auid, u32 ses, u32 secid); 701ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7022532386fSEric Paris u32 auid, u32 ses, u32 secid); 703ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 7042532386fSEric Paris u32 auid, u32 ses, u32 secid); 705ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7062532386fSEric Paris u32 auid, u32 ses, u32 secid); 707afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 708afeb14b4SPaul Moore struct sk_buff *skb); 7099fdc4883SSteffen Klassert extern void xfrm_audit_state_replay(struct xfrm_state *x, 7109fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq); 711afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 712afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 713afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 714afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 715afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 716c9204d9cSJoy Latten #else 71741fef0eeSMarcin Slusarz 71841fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 71941fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 72041fef0eeSMarcin Slusarz { 72141fef0eeSMarcin Slusarz } 72241fef0eeSMarcin Slusarz 72341fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 72441fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 72541fef0eeSMarcin Slusarz { 72641fef0eeSMarcin Slusarz } 72741fef0eeSMarcin Slusarz 72841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 72941fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 73041fef0eeSMarcin Slusarz { 73141fef0eeSMarcin Slusarz } 73241fef0eeSMarcin Slusarz 73341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 73441fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 73541fef0eeSMarcin Slusarz { 73641fef0eeSMarcin Slusarz } 73741fef0eeSMarcin Slusarz 73841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 73941fef0eeSMarcin Slusarz struct sk_buff *skb) 74041fef0eeSMarcin Slusarz { 74141fef0eeSMarcin Slusarz } 74241fef0eeSMarcin Slusarz 7439fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7449fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7459fdc4883SSteffen Klassert { 7469fdc4883SSteffen Klassert } 7479fdc4883SSteffen Klassert 74841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 74941fef0eeSMarcin Slusarz u16 family) 75041fef0eeSMarcin Slusarz { 75141fef0eeSMarcin Slusarz } 75241fef0eeSMarcin Slusarz 75341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 75441fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 75541fef0eeSMarcin Slusarz { 75641fef0eeSMarcin Slusarz } 75741fef0eeSMarcin Slusarz 75841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 75941fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 76041fef0eeSMarcin Slusarz { 76141fef0eeSMarcin Slusarz } 762c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 763161a09e7SJoy Latten 7641da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7651da177e4SLinus Torvalds { 7661da177e4SLinus Torvalds if (likely(policy != NULL)) 7671da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds 77064c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7731da177e4SLinus Torvalds { 7741da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 77564c31b3fSWANG Cong xfrm_policy_destroy(policy); 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 7784e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7794e81bb83SMasahide NAKAMURA { 7804e81bb83SMasahide NAKAMURA int i; 7814e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7824e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7834e81bb83SMasahide NAKAMURA } 7844e81bb83SMasahide NAKAMURA 7851da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7861da177e4SLinus Torvalds 78721380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 78821380b81SHerbert Xu { 78921380b81SHerbert Xu atomic_dec(&x->refcnt); 79021380b81SHerbert Xu } 79121380b81SHerbert Xu 7921da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7931da177e4SLinus Torvalds { 7941da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7951da177e4SLinus Torvalds __xfrm_state_destroy(x); 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7991da177e4SLinus Torvalds { 8001da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds 8031744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8041744a8feSDavid S. Miller int prefixlen) 8051da177e4SLinus Torvalds { 8061744a8feSDavid S. Miller const __be32 *a1 = token1; 8071744a8feSDavid S. Miller const __be32 *a2 = token2; 8081da177e4SLinus Torvalds int pdw; 8091da177e4SLinus Torvalds int pbi; 8101da177e4SLinus Torvalds 811a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8121da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds if (pdw) 8151da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8161744a8feSDavid S. Miller return false; 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds if (pbi) { 8195f19343fSAl Viro __be32 mask; 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8241744a8feSDavid S. Miller return false; 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds 8271744a8feSDavid S. Miller return true; 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds 83026bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 83126bff940SAlexey Dobriyan { 83226bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 83326bff940SAlexey Dobriyan if (prefixlen == 0) 83426bff940SAlexey Dobriyan return true; 83526bff940SAlexey Dobriyan return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); 83626bff940SAlexey Dobriyan } 83726bff940SAlexey Dobriyan 8381da177e4SLinus Torvalds static __inline__ 8396281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8401da177e4SLinus Torvalds { 841f9d07e41SAl Viro __be16 port; 8421d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8431da177e4SLinus Torvalds case IPPROTO_TCP: 8441da177e4SLinus Torvalds case IPPROTO_UDP: 845ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8461da177e4SLinus Torvalds case IPPROTO_SCTP: 8476281dcc9SDavid S. Miller port = uli->ports.sport; 8481da177e4SLinus Torvalds break; 8491da177e4SLinus Torvalds case IPPROTO_ICMP: 8501da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8516281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8521da177e4SLinus Torvalds break; 8532ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8546281dcc9SDavid S. Miller port = htons(uli->mht.type); 8552ce4272aSMasahide NAKAMURA break; 856cc9ff19dSTimo Teräs case IPPROTO_GRE: 8576281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 858cc9ff19dSTimo Teräs break; 8591da177e4SLinus Torvalds default: 8601da177e4SLinus Torvalds port = 0; /*XXX*/ 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds return port; 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds static __inline__ 8666281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8671da177e4SLinus Torvalds { 868f9d07e41SAl Viro __be16 port; 8691d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8701da177e4SLinus Torvalds case IPPROTO_TCP: 8711da177e4SLinus Torvalds case IPPROTO_UDP: 872ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8731da177e4SLinus Torvalds case IPPROTO_SCTP: 8746281dcc9SDavid S. Miller port = uli->ports.dport; 8751da177e4SLinus Torvalds break; 8761da177e4SLinus Torvalds case IPPROTO_ICMP: 8771da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8786281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8791da177e4SLinus Torvalds break; 880cc9ff19dSTimo Teräs case IPPROTO_GRE: 8816281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 882cc9ff19dSTimo Teräs break; 8831da177e4SLinus Torvalds default: 8841da177e4SLinus Torvalds port = 0; /*XXX*/ 8851da177e4SLinus Torvalds } 8861da177e4SLinus Torvalds return port; 8871da177e4SLinus Torvalds } 8881da177e4SLinus Torvalds 889200ce96eSDavid S. Miller extern int xfrm_selector_match(const struct xfrm_selector *sel, 890e1ad2ab2SDavid S. Miller const struct flowi *fl, 89177681021SAndrew Morton unsigned short family); 8921da177e4SLinus Torvalds 893df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 894df71837dSTrent Jaeger /* If neither has a context --> match 895df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 896df71837dSTrent Jaeger */ 897df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 898df71837dSTrent Jaeger { 899df71837dSTrent Jaeger return ((!s1 && !s2) || 900df71837dSTrent Jaeger (s1 && s2 && 901df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 902df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 903df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 904df71837dSTrent Jaeger } 905df71837dSTrent Jaeger #else 906df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 907df71837dSTrent Jaeger { 908df71837dSTrent Jaeger return 1; 909df71837dSTrent Jaeger } 910df71837dSTrent Jaeger #endif 911df71837dSTrent Jaeger 9121da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9131da177e4SLinus Torvalds * 9141da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9151da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9161da177e4SLinus Torvalds * 9171da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9181da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9191da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9201da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9211da177e4SLinus Torvalds * policy rule. 9221da177e4SLinus Torvalds */ 923fd2c3ef7SEric Dumazet struct xfrm_dst { 9241da177e4SLinus Torvalds union { 9251da177e4SLinus Torvalds struct dst_entry dst; 9261da177e4SLinus Torvalds struct rtable rt; 9271da177e4SLinus Torvalds struct rt6_info rt6; 9281da177e4SLinus Torvalds } u; 9291da177e4SLinus Torvalds struct dst_entry *route; 93080c802f3STimo Teräs struct flow_cache_object flo; 93180c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 93280c802f3STimo Teräs int num_pols, num_xfrms; 933157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 934157bfc25SMasahide NAKAMURA struct flowi *origin; 935157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 936157bfc25SMasahide NAKAMURA #endif 93780c802f3STimo Teräs u32 xfrm_genid; 93880c802f3STimo Teräs u32 policy_genid; 9391da177e4SLinus Torvalds u32 route_mtu_cached; 9401da177e4SLinus Torvalds u32 child_mtu_cached; 94192d63decSHideaki YOSHIFUJI u32 route_cookie; 94292d63decSHideaki YOSHIFUJI u32 path_cookie; 9431da177e4SLinus Torvalds }; 9441da177e4SLinus Torvalds 945def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 946aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 947aabc9761SHerbert Xu { 94880c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 949aabc9761SHerbert Xu dst_release(xdst->route); 950aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 951aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 952157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 953157bfc25SMasahide NAKAMURA kfree(xdst->origin); 954157bfc25SMasahide NAKAMURA xdst->origin = NULL; 955157bfc25SMasahide NAKAMURA kfree(xdst->partner); 956157bfc25SMasahide NAKAMURA xdst->partner = NULL; 957157bfc25SMasahide NAKAMURA #endif 958aabc9761SHerbert Xu } 959def8b4faSAlexey Dobriyan #endif 960aabc9761SHerbert Xu 961aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 962aabc9761SHerbert Xu 963fd2c3ef7SEric Dumazet struct sec_path { 9641da177e4SLinus Torvalds atomic_t refcnt; 9651da177e4SLinus Torvalds int len; 966dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9671da177e4SLinus Torvalds }; 9681da177e4SLinus Torvalds 969990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 970990078afSMichael Smith { 971990078afSMichael Smith #ifdef CONFIG_XFRM 972990078afSMichael Smith return skb->sp != NULL; 973990078afSMichael Smith #else 974990078afSMichael Smith return 0; 975990078afSMichael Smith #endif 976990078afSMichael Smith } 977990078afSMichael Smith 9781da177e4SLinus Torvalds static inline struct sec_path * 9791da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9801da177e4SLinus Torvalds { 9811da177e4SLinus Torvalds if (sp) 9821da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9831da177e4SLinus Torvalds return sp; 9841da177e4SLinus Torvalds } 9851da177e4SLinus Torvalds 9861da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds static inline void 9891da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9901da177e4SLinus Torvalds { 9911da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9921da177e4SLinus Torvalds __secpath_destroy(sp); 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds static inline void 9981da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9991da177e4SLinus Torvalds { 10001da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10011da177e4SLinus Torvalds secpath_put(skb->sp); 10021da177e4SLinus Torvalds skb->sp = NULL; 10031da177e4SLinus Torvalds #endif 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds static inline int 10076cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1008a1e59abfSPatrick McHardy { 1009a1e59abfSPatrick McHardy switch (family) { 1010a1e59abfSPatrick McHardy case AF_INET: 1011a1e59abfSPatrick McHardy return addr->a4 == 0; 1012a1e59abfSPatrick McHardy case AF_INET6: 1013a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 1014a1e59abfSPatrick McHardy } 1015a1e59abfSPatrick McHardy return 0; 1016a1e59abfSPatrick McHardy } 1017a1e59abfSPatrick McHardy 1018a1e59abfSPatrick McHardy static inline int 101921eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10201da177e4SLinus Torvalds { 10211da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10221da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10231da177e4SLinus Torvalds } 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds static inline int 102621eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10271da177e4SLinus Torvalds { 10281da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 10291da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10301da177e4SLinus Torvalds } 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds static inline int 103321eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10341da177e4SLinus Torvalds { 10351da177e4SLinus Torvalds switch (family) { 10361da177e4SLinus Torvalds case AF_INET: 10371da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10381da177e4SLinus Torvalds case AF_INET6: 10391da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10401da177e4SLinus Torvalds } 10411da177e4SLinus Torvalds return !0; 10421da177e4SLinus Torvalds } 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10451da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 10461da177e4SLinus Torvalds 1047d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1048d5422efeSHerbert Xu struct sk_buff *skb, 1049d5422efeSHerbert Xu unsigned int family, int reverse) 10501da177e4SLinus Torvalds { 1051f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1052d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1053d5422efeSHerbert Xu 10541da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1055d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10561da177e4SLinus Torvalds 1057f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1058adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1059d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1060d5422efeSHerbert Xu } 1061d5422efeSHerbert Xu 1062d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1063d5422efeSHerbert Xu { 1064d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10681da177e4SLinus Torvalds { 10691da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds 10721da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10731da177e4SLinus Torvalds { 10741da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds 1077d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1078d5422efeSHerbert Xu struct sk_buff *skb) 1079d5422efeSHerbert Xu { 1080d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1081d5422efeSHerbert Xu } 1082d5422efeSHerbert Xu 1083d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1084d5422efeSHerbert Xu struct sk_buff *skb) 1085d5422efeSHerbert Xu { 1086d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1087d5422efeSHerbert Xu } 1088d5422efeSHerbert Xu 1089d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1090d5422efeSHerbert Xu unsigned int family, int reverse); 1091d5422efeSHerbert Xu 1092d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1093d5422efeSHerbert Xu unsigned int family) 1094d5422efeSHerbert Xu { 1095d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1096d5422efeSHerbert Xu } 1097d5422efeSHerbert Xu 1098d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1099d5422efeSHerbert Xu struct flowi *fl, 1100d5422efeSHerbert Xu unsigned int family) 1101d5422efeSHerbert Xu { 1102d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1103d5422efeSHerbert Xu } 1104d5422efeSHerbert Xu 11051da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 11081da177e4SLinus Torvalds { 110999a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 111099a66657SAlexey Dobriyan 111199a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1112adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11131da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11171da177e4SLinus Torvalds { 11181da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11221da177e4SLinus Torvalds { 11231da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 11311da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 11321da177e4SLinus Torvalds return 0; 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 11354666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11381da177e4SLinus Torvalds { 11391da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 11401da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 11411da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 11441da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 11451da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds } 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds #else 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 11521da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 11531da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11541da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11551da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11561da177e4SLinus Torvalds { 11571da177e4SLinus Torvalds return 1; 11581da177e4SLinus Torvalds } 11591da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11601da177e4SLinus Torvalds { 11611da177e4SLinus Torvalds return 1; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11641da177e4SLinus Torvalds { 11651da177e4SLinus Torvalds return 1; 11661da177e4SLinus Torvalds } 1167d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1168d5422efeSHerbert Xu struct flowi *fl, 1169d5422efeSHerbert Xu unsigned int family) 1170d5422efeSHerbert Xu { 1171d5422efeSHerbert Xu return -ENOSYS; 1172d5422efeSHerbert Xu } 1173d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1174d5422efeSHerbert Xu struct sk_buff *skb) 1175d5422efeSHerbert Xu { 1176d5422efeSHerbert Xu return 1; 1177d5422efeSHerbert Xu } 1178d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1179d5422efeSHerbert Xu struct sk_buff *skb) 1180d5422efeSHerbert Xu { 1181d5422efeSHerbert Xu return 1; 1182d5422efeSHerbert Xu } 11831da177e4SLinus Torvalds #endif 11841da177e4SLinus Torvalds 11851da177e4SLinus Torvalds static __inline__ 1186e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 11871da177e4SLinus Torvalds { 11881da177e4SLinus Torvalds switch (family){ 11891da177e4SLinus Torvalds case AF_INET: 11907e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 11911da177e4SLinus Torvalds case AF_INET6: 11927e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 11931da177e4SLinus Torvalds } 11941da177e4SLinus Torvalds return NULL; 11951da177e4SLinus Torvalds } 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds static __inline__ 1198e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 11991da177e4SLinus Torvalds { 12001da177e4SLinus Torvalds switch (family){ 12011da177e4SLinus Torvalds case AF_INET: 12027e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 12031da177e4SLinus Torvalds case AF_INET6: 12047e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds return NULL; 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds 12099bb182a7SYOSHIFUJI Hideaki static __inline__ 1210e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12119bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12129bb182a7SYOSHIFUJI Hideaki unsigned short family) 12139bb182a7SYOSHIFUJI Hideaki { 12149bb182a7SYOSHIFUJI Hideaki switch(family) { 12159bb182a7SYOSHIFUJI Hideaki case AF_INET: 12167e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12177e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12189bb182a7SYOSHIFUJI Hideaki break; 12199bb182a7SYOSHIFUJI Hideaki case AF_INET6: 1220*4e3fd7a0SAlexey Dobriyan *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; 1221*4e3fd7a0SAlexey Dobriyan *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; 12229bb182a7SYOSHIFUJI Hideaki break; 12239bb182a7SYOSHIFUJI Hideaki } 12249bb182a7SYOSHIFUJI Hideaki } 12259bb182a7SYOSHIFUJI Hideaki 12261da177e4SLinus Torvalds static __inline__ int 1227f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1228f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12291da177e4SLinus Torvalds { 12301da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12311da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12321da177e4SLinus Torvalds return 1; 12331da177e4SLinus Torvalds return 0; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds static __inline__ int 1237f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1238f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12391da177e4SLinus Torvalds { 12401da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 12411da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 12421da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12431da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12441da177e4SLinus Torvalds return 1; 12451da177e4SLinus Torvalds return 0; 12461da177e4SLinus Torvalds } 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds static __inline__ int 1249f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1250f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12511da177e4SLinus Torvalds unsigned short family) 12521da177e4SLinus Torvalds { 12531da177e4SLinus Torvalds switch (family) { 12541da177e4SLinus Torvalds case AF_INET: 12551da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12561da177e4SLinus Torvalds case AF_INET6: 12571da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds return 0; 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds 1262e53820deSMasahide NAKAMURA static __inline__ int 1263f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1264e53820deSMasahide NAKAMURA unsigned short family) 1265e53820deSMasahide NAKAMURA { 1266e53820deSMasahide NAKAMURA switch (family) { 1267e53820deSMasahide NAKAMURA case AF_INET: 1268e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12697e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12707e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1271e53820deSMasahide NAKAMURA case AF_INET6: 1272e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12737e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 12747e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1275e53820deSMasahide NAKAMURA } 1276e53820deSMasahide NAKAMURA return 0; 1277e53820deSMasahide NAKAMURA } 1278e53820deSMasahide NAKAMURA 1279f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 12801da177e4SLinus Torvalds { 12811da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12821da177e4SLinus Torvalds } 12831da177e4SLinus Torvalds 12845794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12855794708fSMasahide NAKAMURA { 1286dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1287dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1288dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1289dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12905794708fSMasahide NAKAMURA } 12915794708fSMasahide NAKAMURA 12921da177e4SLinus Torvalds /* 12931da177e4SLinus Torvalds * xfrm algorithm information 12941da177e4SLinus Torvalds */ 12951a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12961a6509d9SHerbert Xu u16 icv_truncbits; 12971a6509d9SHerbert Xu }; 12981a6509d9SHerbert Xu 12991da177e4SLinus Torvalds struct xfrm_algo_auth_info { 13001da177e4SLinus Torvalds u16 icv_truncbits; 13011da177e4SLinus Torvalds u16 icv_fullbits; 13021da177e4SLinus Torvalds }; 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds struct xfrm_algo_encr_info { 13051da177e4SLinus Torvalds u16 blockbits; 13061da177e4SLinus Torvalds u16 defkeybits; 13071da177e4SLinus Torvalds }; 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13101da177e4SLinus Torvalds u16 threshold; 13111da177e4SLinus Torvalds }; 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds struct xfrm_algo_desc { 13141da177e4SLinus Torvalds char *name; 131504ff1260SHerbert Xu char *compat; 13161da177e4SLinus Torvalds u8 available:1; 13171da177e4SLinus Torvalds union { 13181a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13191da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13201da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13211da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13221da177e4SLinus Torvalds } uinfo; 13231da177e4SLinus Torvalds struct sadb_alg desc; 13241da177e4SLinus Torvalds }; 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13271da177e4SLinus Torvalds struct xfrm_tunnel { 13281da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1329a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1330d2acc347SHerbert Xu 1331b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1332d2acc347SHerbert Xu int priority; 13331da177e4SLinus Torvalds }; 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds struct xfrm6_tunnel { 1336d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1337d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1338d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13396f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1340d2acc347SHerbert Xu int priority; 13411da177e4SLinus Torvalds }; 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds extern void xfrm_init(void); 1344a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1345d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1346d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 13471da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1348c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1349c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1350c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 13510013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 13521da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1353c35b7e72SDaniel Lezcano #else 1354c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1355c35b7e72SDaniel Lezcano { 1356c35b7e72SDaniel Lezcano return 0; 1357c35b7e72SDaniel Lezcano } 1358c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1359c35b7e72SDaniel Lezcano { 1360c35b7e72SDaniel Lezcano ; 1361c35b7e72SDaniel Lezcano } 1362c35b7e72SDaniel Lezcano #endif 13631da177e4SLinus Torvalds 1364558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1365c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1366c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1367558f82efSMasahide NAKAMURA #endif 1368558f82efSMasahide NAKAMURA 1369b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1370b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1371b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1372b27aeadbSAlexey Dobriyan #else 1373b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1374b27aeadbSAlexey Dobriyan { 1375b27aeadbSAlexey Dobriyan } 1376b27aeadbSAlexey Dobriyan #endif 1377b27aeadbSAlexey Dobriyan 13785c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1379284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13804c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1381abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1382673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 138333765d06SDavid S. Miller extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 138433765d06SDavid S. Miller const xfrm_address_t *saddr, 1385b520e9f6SDavid S. Miller const struct flowi *fl, 1386b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 13871da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13881da177e4SLinus Torvalds unsigned short family); 1389bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13905447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1391628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1392628529b6SJamal Hadi Salim unsigned short family, 1393628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13941da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13951da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13961da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13971da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1398bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1399a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1400bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1401bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1402a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1403a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1404bd55775cSJamal Hadi Salim u8 proto, 1405bd55775cSJamal Hadi Salim unsigned short family); 140641a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 140741a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 140841a49cc3SMasahide NAKAMURA int n, unsigned short family); 140941a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 141041a49cc3SMasahide NAKAMURA int n, unsigned short family); 141141a49cc3SMasahide NAKAMURA #else 141241a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 141341a49cc3SMasahide NAKAMURA int n, unsigned short family) 141441a49cc3SMasahide NAKAMURA { 141541a49cc3SMasahide NAKAMURA return -ENOSYS; 141641a49cc3SMasahide NAKAMURA } 141741a49cc3SMasahide NAKAMURA 141841a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 141941a49cc3SMasahide NAKAMURA int n, unsigned short family) 142041a49cc3SMasahide NAKAMURA { 142141a49cc3SMasahide NAKAMURA return -ENOSYS; 142241a49cc3SMasahide NAKAMURA } 142341a49cc3SMasahide NAKAMURA #endif 1424af11e316SJamal Hadi Salim 1425af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1426af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1427af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1428af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1429af11e316SJamal Hadi Salim }; 1430af11e316SJamal Hadi Salim 14315a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14325a6d3416SJamal Hadi Salim u32 incnt; 14335a6d3416SJamal Hadi Salim u32 outcnt; 14345a6d3416SJamal Hadi Salim u32 fwdcnt; 14355a6d3416SJamal Hadi Salim u32 inscnt; 14365a6d3416SJamal Hadi Salim u32 outscnt; 14375a6d3416SJamal Hadi Salim u32 fwdscnt; 14385a6d3416SJamal Hadi Salim u32 spdhcnt; 14395a6d3416SJamal Hadi Salim u32 spdhmcnt; 14405a6d3416SJamal Hadi Salim }; 14415a6d3416SJamal Hadi Salim 1442bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1443bd55775cSJamal Hadi Salim u32 seq); 144426b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 14450e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1446e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1447e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 14482cd08467SSteffen Klassert extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 14499fdc4883SSteffen Klassert extern int xfrm_init_replay(struct xfrm_state *x); 14501da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1451a454f0ccSWei Yongjun extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 145272cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1453227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1454716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1455716062fdSHerbert Xu int encap_type); 14561bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1457c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1458406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1459df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 146036cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1461227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1462c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1463c4541b41SHerbert Xu int encap_type); 1464716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14651da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1466c4541b41SHerbert Xu 1467c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1468c4541b41SHerbert Xu { 1469c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1470c4541b41SHerbert Xu } 1471c4541b41SHerbert Xu 147236cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 147336cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14741da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 147543a4dea4SSteffen Klassert extern int xfrm4_output_finish(struct sk_buff *skb); 1476c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1477c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 147836cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1479227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 148033b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1481716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1482e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1483fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1484fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 148573d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 148673d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1487a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1488b71d1d42SEric Dumazet extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 148936cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 149036cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14911da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 149243a4dea4SSteffen Klassert extern int xfrm6_output_finish(struct sk_buff *skb); 1493aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1494aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14951da177e4SLinus Torvalds 14961da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1497067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14981da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14991da177e4SLinus Torvalds #else 15001da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 15011da177e4SLinus Torvalds { 15021da177e4SLinus Torvalds return -ENOPROTOOPT; 15031da177e4SLinus Torvalds } 15041da177e4SLinus Torvalds 1505067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 15061da177e4SLinus Torvalds { 15071da177e4SLinus Torvalds /* should not happen */ 15081da177e4SLinus Torvalds kfree_skb(skb); 15091da177e4SLinus Torvalds return 0; 15101da177e4SLinus Torvalds } 15111da177e4SLinus Torvalds #endif 15121da177e4SLinus Torvalds 15130331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15144c563f76STimo Teras 151512a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1516cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 15174c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 151812a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 15191da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15208ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15218ca2e93bSJamal Hadi Salim u8 type, int dir, 15224e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1523ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1524ef41aaa0SEric Paris int *err); 15258ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 152633ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 15271da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1528658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1529bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1530bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1531a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1532a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1533bd55775cSJamal Hadi Salim unsigned short family); 15341da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 15351da177e4SLinus Torvalds 153680c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1537183cad12SDavid S. Miller extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1538183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1539183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 154080c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 154180c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 154280c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1543b4b7c0b3SDavid S. Miller extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 154413c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 154513c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 154680c9abaaSShinta Sugimoto #endif 154780c9abaaSShinta Sugimoto 15485d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 15496c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1550db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 15511da177e4SLinus Torvalds 15521da177e4SLinus Torvalds extern void xfrm_input_init(void); 15536067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 15541da177e4SLinus Torvalds 15551da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 15561da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 15571da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 15581da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 15591da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 15601da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 15611da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 15621da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 15636f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 15646f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 15656f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 15666f2f19edSDavid S. Miller extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 15671a6509d9SHerbert Xu int probe); 15681da177e4SLinus Torvalds 156907d4ee58SHerbert Xu struct hash_desc; 15709409f38aSHerbert Xu struct scatterlist; 157107d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 157207d4ee58SHerbert Xu unsigned int); 15731da177e4SLinus Torvalds 1574ff6acd16SDavid S. Miller static inline int xfrm_addr_cmp(const xfrm_address_t *a, 1575ff6acd16SDavid S. Miller const xfrm_address_t *b, 15761da177e4SLinus Torvalds int family) 15771da177e4SLinus Torvalds { 15781da177e4SLinus Torvalds switch (family) { 15791da177e4SLinus Torvalds default: 15801da177e4SLinus Torvalds case AF_INET: 1581a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15821da177e4SLinus Torvalds case AF_INET6: 1583b71d1d42SEric Dumazet return ipv6_addr_cmp((const struct in6_addr *)a, 1584b71d1d42SEric Dumazet (const struct in6_addr *)b); 15851da177e4SLinus Torvalds } 15861da177e4SLinus Torvalds } 15871da177e4SLinus Torvalds 158877d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 158977d8d7a6SHerbert Xu { 159077d8d7a6SHerbert Xu return index & 7; 159177d8d7a6SHerbert Xu } 159277d8d7a6SHerbert Xu 1593a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1594a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1595f8cd5488SJamal Hadi Salim { 1596be33690dSPatrick McHardy struct sock *nlsk; 1597be33690dSPatrick McHardy int ret = 0; 1598be33690dSPatrick McHardy 1599be33690dSPatrick McHardy rcu_read_lock(); 1600a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1601be33690dSPatrick McHardy if (nlsk) 1602be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1603be33690dSPatrick McHardy rcu_read_unlock(); 1604be33690dSPatrick McHardy return ret; 1605f8cd5488SJamal Hadi Salim } 1606a6483b79SAlexey Dobriyan #endif 1607f8cd5488SJamal Hadi Salim 160885158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 16090f99be0dSEric Dumazet { 16100f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16110f99be0dSEric Dumazet } 16120f99be0dSEric Dumazet 161385158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 16144447bb33SMartin Willi { 16154447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 16164447bb33SMartin Willi } 16174447bb33SMartin Willi 16189736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 16199736acf3SSteffen Klassert { 16209736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 16219736acf3SSteffen Klassert } 16229736acf3SSteffen Klassert 162380c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1624af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1625af2f464eSSteffen Klassert struct xfrm_state *orig) 1626af2f464eSSteffen Klassert { 1627af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1628af2f464eSSteffen Klassert GFP_KERNEL); 1629af2f464eSSteffen Klassert if (!x->replay_esn) 1630af2f464eSSteffen Klassert return -ENOMEM; 1631af2f464eSSteffen Klassert 1632af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1633af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1634af2f464eSSteffen Klassert 1635af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1636af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1637af2f464eSSteffen Klassert GFP_KERNEL); 1638af2f464eSSteffen Klassert if (!x->preplay_esn) { 1639af2f464eSSteffen Klassert kfree(x->replay_esn); 1640af2f464eSSteffen Klassert return -ENOMEM; 1641af2f464eSSteffen Klassert } 1642af2f464eSSteffen Klassert 1643af2f464eSSteffen Klassert return 0; 1644af2f464eSSteffen Klassert } 1645af2f464eSSteffen Klassert 164680c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 164780c9abaaSShinta Sugimoto { 16480f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 164980c9abaaSShinta Sugimoto } 165080c9abaaSShinta Sugimoto 16514447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 16524447bb33SMartin Willi { 16534447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 16544447bb33SMartin Willi } 16554447bb33SMartin Willi 165680c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 165780c9abaaSShinta Sugimoto { 165880c9abaaSShinta Sugimoto int i; 165980c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 166080c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 166180c9abaaSShinta Sugimoto } 166280c9abaaSShinta Sugimoto 166380c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 166480c9abaaSShinta Sugimoto { 166580c9abaaSShinta Sugimoto int i; 166680c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 166780c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 166880c9abaaSShinta Sugimoto } 166980c9abaaSShinta Sugimoto #endif 1670f8cd5488SJamal Hadi Salim 1671def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 167200501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 167300501121SHerbert Xu { 167400501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 167500501121SHerbert Xu } 1676def8b4faSAlexey Dobriyan #endif 167700501121SHerbert Xu 1678bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1679bf825f81SJamal Hadi Salim { 1680bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 16814efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1682bf825f81SJamal Hadi Salim else 1683bf825f81SJamal Hadi Salim m->v = m->m = 0; 1684bf825f81SJamal Hadi Salim 1685bf825f81SJamal Hadi Salim return m->v & m->m; 1686bf825f81SJamal Hadi Salim } 1687bf825f81SJamal Hadi Salim 1688e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1689bf825f81SJamal Hadi Salim { 1690bf825f81SJamal Hadi Salim if (m->m | m->v) 1691bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1692bf825f81SJamal Hadi Salim return 0; 1693bf825f81SJamal Hadi Salim 1694bf825f81SJamal Hadi Salim nla_put_failure: 1695bf825f81SJamal Hadi Salim return -1; 1696bf825f81SJamal Hadi Salim } 1697bf825f81SJamal Hadi Salim 16981da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1699