1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 21da177e4SLinus Torvalds #ifndef _NET_XFRM_H 31da177e4SLinus Torvalds #define _NET_XFRM_H 41da177e4SLinus Torvalds 5aabc9761SHerbert Xu #include <linux/compiler.h> 61da177e4SLinus Torvalds #include <linux/xfrm.h> 71da177e4SLinus Torvalds #include <linux/spinlock.h> 81da177e4SLinus Torvalds #include <linux/list.h> 91da177e4SLinus Torvalds #include <linux/skbuff.h> 1014c85021SArnaldo Carvalho de Melo #include <linux/socket.h> 111da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 125794708fSMasahide NAKAMURA #include <linux/ipsec.h> 131da177e4SLinus Torvalds #include <linux/in6.h> 144a3e2f71SArjan van de Ven #include <linux/mutex.h> 15ab5f5e8bSJoy Latten #include <linux/audit.h> 165a0e3ad6STejun Heo #include <linux/slab.h> 1788755e9cSReshetova, Elena #include <linux/refcount.h> 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds #include <net/sock.h> 201da177e4SLinus Torvalds #include <net/dst.h> 21436a0a40SHerbert Xu #include <net/ip.h> 221da177e4SLinus Torvalds #include <net/route.h> 231da177e4SLinus Torvalds #include <net/ipv6.h> 241da177e4SLinus Torvalds #include <net/ip6_fib.h> 25fe1a5f03STimo Teräs #include <net/flow.h> 26f203b76dSSteffen Klassert #include <net/gro_cells.h> 279e0d57fdSYury Polyanskiy 289e0d57fdSYury Polyanskiy #include <linux/interrupt.h> 299e0d57fdSYury Polyanskiy 30558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 31558f82efSMasahide NAKAMURA #include <net/snmp.h> 32558f82efSMasahide NAKAMURA #endif 331da177e4SLinus Torvalds 34d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 35d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 36d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 37d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 38d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 39d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 40d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 41d3d6dd3aSMasahide NAKAMURA 42fa9921e4SNicolas Dichtel #define XFRM_ALIGN4(len) (((len) + 3) & ~3) 431da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 44b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 45b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 46d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 47d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 48ffdb5211SIlan Tayari #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ 49ffdb5211SIlan Tayari MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) 501da177e4SLinus Torvalds 51558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 5259c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) 53558f82efSMasahide NAKAMURA #else 5459c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) ((void)(net)) 55558f82efSMasahide NAKAMURA #endif 56558f82efSMasahide NAKAMURA 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 u8 dying; 12312a169e7SHerbert Xu u8 proto; 12412a169e7SHerbert Xu u32 seq; 125870a2df4SNicolas Dichtel struct xfrm_address_filter *filter; 12612a169e7SHerbert Xu }; 12712a169e7SHerbert Xu 128d77e38e6SSteffen Klassert struct xfrm_state_offload { 129d77e38e6SSteffen Klassert struct net_device *dev; 130d77e38e6SSteffen Klassert unsigned long offload_handle; 131d77e38e6SSteffen Klassert unsigned int num_exthdrs; 132d77e38e6SSteffen Klassert u8 flags; 133d77e38e6SSteffen Klassert }; 134d77e38e6SSteffen Klassert 1351da177e4SLinus Torvalds /* Full description of state of transformer. */ 136fd2c3ef7SEric Dumazet struct xfrm_state { 1370c5c9fb5SEric W. Biederman possible_net_t xs_net; 138abb81c4fSHerbert Xu union { 13912a169e7SHerbert Xu struct hlist_node gclist; 1408f126e37SDavid S. Miller struct hlist_node bydst; 141abb81c4fSHerbert Xu }; 1428f126e37SDavid S. Miller struct hlist_node bysrc; 1438f126e37SDavid S. Miller struct hlist_node byspi; 1441da177e4SLinus Torvalds 14588755e9cSReshetova, Elena refcount_t refcnt; 1461da177e4SLinus Torvalds spinlock_t lock; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds struct xfrm_id id; 1491da177e4SLinus Torvalds struct xfrm_selector sel; 150bf825f81SJamal Hadi Salim struct xfrm_mark mark; 1517e652640SSteffen Klassert u32 if_id; 15235d2856bSMartin Willi u32 tfcpad; 1531da177e4SLinus Torvalds 1549d4a706dSDavid S. Miller u32 genid; 1559d4a706dSDavid S. Miller 15612a169e7SHerbert Xu /* Key manager bits */ 15712a169e7SHerbert Xu struct xfrm_state_walk km; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* Parameters of this state. */ 1601da177e4SLinus Torvalds struct { 1611da177e4SLinus Torvalds u32 reqid; 1621da177e4SLinus Torvalds u8 mode; 1631da177e4SLinus Torvalds u8 replay_window; 1641da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1651da177e4SLinus Torvalds u8 flags; 1661da177e4SLinus Torvalds u16 family; 1671da177e4SLinus Torvalds xfrm_address_t saddr; 1681da177e4SLinus Torvalds int header_len; 1691da177e4SLinus Torvalds int trailer_len; 170a947b0a9SNicolas Dichtel u32 extra_flags; 1719b42c1f1SSteffen Klassert struct xfrm_mark smark; 1721da177e4SLinus Torvalds } props; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds /* Data for transformer */ 1774447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1781da177e4SLinus Torvalds struct xfrm_algo *ealg; 1791da177e4SLinus Torvalds struct xfrm_algo *calg; 1801a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 18169b0137fSHerbert Xu const char *geniv; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds /* Data for encapsulator */ 1841da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1851da177e4SLinus Torvalds 186060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 187060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 188060f02a3SNoriaki TAKAMIYA 1891da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1901da177e4SLinus Torvalds struct xfrm_state *tunnel; 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1931da177e4SLinus Torvalds atomic_t tunnel_users; 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds /* State for replay detection */ 1961da177e4SLinus Torvalds struct xfrm_replay_state replay; 1979736acf3SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 1981da177e4SLinus Torvalds 199f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 200f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 2019736acf3SSteffen Klassert struct xfrm_replay_state_esn *preplay_esn; 202f8cd5488SJamal Hadi Salim 2039fdc4883SSteffen Klassert /* The functions for replay detection. */ 204e45a8a9eSJulia Lawall const struct xfrm_replay *repl; 2059fdc4883SSteffen Klassert 2062717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 2072717096aSJamal Hadi Salim * moment 2082717096aSJamal Hadi Salim */ 2092717096aSJamal Hadi Salim u32 xflags; 2102717096aSJamal Hadi Salim 211f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 212f8cd5488SJamal Hadi Salim u32 replay_maxage; 213f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 214f8cd5488SJamal Hadi Salim 215f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 216f8cd5488SJamal Hadi Salim struct timer_list rtimer; 217f8cd5488SJamal Hadi Salim 2181da177e4SLinus Torvalds /* Statistics */ 2191da177e4SLinus Torvalds struct xfrm_stats stats; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2229e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2231da177e4SLinus Torvalds 224d77e38e6SSteffen Klassert struct xfrm_state_offload xso; 225d77e38e6SSteffen Klassert 226e3c0d047SFan Du /* used to fix curlft->add_time when changing date */ 227e3c0d047SFan Du long saved_tmo; 228e3c0d047SFan Du 2299afaca05SMasahide NAKAMURA /* Last used time */ 23003dc7a35SArnd Bergmann time64_t lastused; 2319afaca05SMasahide NAKAMURA 232cac2661cSSteffen Klassert struct page_frag xfrag; 233cac2661cSSteffen Klassert 2341da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2351da177e4SLinus Torvalds * transformer. */ 236533cb5b0SEric Dumazet const struct xfrm_type *type; 23713996378SHerbert Xu struct xfrm_mode *inner_mode; 238df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 23913996378SHerbert Xu struct xfrm_mode *outer_mode; 2401da177e4SLinus Torvalds 2419d389d7fSSteffen Klassert const struct xfrm_type_offload *type_offload; 2429d389d7fSSteffen Klassert 243df71837dSTrent Jaeger /* Security context */ 244df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 245df71837dSTrent Jaeger 2461da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2471da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2481da177e4SLinus Torvalds void *data; 2491da177e4SLinus Torvalds }; 2501da177e4SLinus Torvalds 251673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 252673c09beSAlexey Dobriyan { 253673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 254673c09beSAlexey Dobriyan } 255673c09beSAlexey Dobriyan 2562717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2572717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 258e3c0d047SFan Du #define XFRM_SOFT_EXPIRE 2 2592717096aSJamal Hadi Salim 2601da177e4SLinus Torvalds enum { 2611da177e4SLinus Torvalds XFRM_STATE_VOID, 2621da177e4SLinus Torvalds XFRM_STATE_ACQ, 2631da177e4SLinus Torvalds XFRM_STATE_VALID, 2641da177e4SLinus Torvalds XFRM_STATE_ERROR, 2651da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2661da177e4SLinus Torvalds XFRM_STATE_DEAD 2671da177e4SLinus Torvalds }; 2681da177e4SLinus Torvalds 26926b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 270fd2c3ef7SEric Dumazet struct km_event { 271bf08867fSHerbert Xu union { 272bf08867fSHerbert Xu u32 hard; 273bf08867fSHerbert Xu u32 proto; 274bf08867fSHerbert Xu u32 byid; 275f8cd5488SJamal Hadi Salim u32 aevent; 276f7b6983fSMasahide NAKAMURA u32 type; 277bf08867fSHerbert Xu } data; 278bf08867fSHerbert Xu 27926b15dadSJamal Hadi Salim u32 seq; 28015e47304SEric W. Biederman u32 portid; 28126b15dadSJamal Hadi Salim u32 event; 2827067802eSAlexey Dobriyan struct net *net; 28326b15dadSJamal Hadi Salim }; 28426b15dadSJamal Hadi Salim 2859fdc4883SSteffen Klassert struct xfrm_replay { 2869fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2879fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2889fdc4883SSteffen Klassert struct sk_buff *skb, 2899fdc4883SSteffen Klassert __be32 net_seq); 2903b59df46SSteffen Klassert int (*recheck)(struct xfrm_state *x, 2913b59df46SSteffen Klassert struct sk_buff *skb, 2923b59df46SSteffen Klassert __be32 net_seq); 2939fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2949fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2959fdc4883SSteffen Klassert }; 2969fdc4883SSteffen Klassert 297f203b76dSSteffen Klassert struct xfrm_if_cb { 298f203b76dSSteffen Klassert struct xfrm_if *(*decode_session)(struct sk_buff *skb); 299f203b76dSSteffen Klassert }; 300f203b76dSSteffen Klassert 301f203b76dSSteffen Klassert void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); 302f203b76dSSteffen Klassert void xfrm_if_unregister_cb(void); 303f203b76dSSteffen Klassert 30425ee3286SHerbert Xu struct net_device; 3051da177e4SLinus Torvalds struct xfrm_type; 3061da177e4SLinus Torvalds struct xfrm_dst; 3071da177e4SLinus Torvalds struct xfrm_policy_afinfo { 3081da177e4SLinus Torvalds struct dst_ops *dst_ops; 30942a7b32bSDavid Ahern struct dst_entry *(*dst_lookup)(struct net *net, 31042a7b32bSDavid Ahern int tos, int oif, 3115e6b930fSDavid S. Miller const xfrm_address_t *saddr, 312077fbac4SLorenzo Colitti const xfrm_address_t *daddr, 313077fbac4SLorenzo Colitti u32 mark); 31442a7b32bSDavid Ahern int (*get_saddr)(struct net *net, int oif, 31542a7b32bSDavid Ahern xfrm_address_t *saddr, 316077fbac4SLorenzo Colitti xfrm_address_t *daddr, 317077fbac4SLorenzo Colitti u32 mark); 3181da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 319d5422efeSHerbert Xu struct flowi *fl, 320d5422efeSHerbert Xu int reverse); 32105d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 322a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 323a1b05140SMasahide NAKAMURA struct dst_entry *dst, 324a1b05140SMasahide NAKAMURA int nfheader_len); 32525ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 32687c1e12bSHerbert Xu struct net_device *dev, 3270c7b3eefSDavid S. Miller const struct flowi *fl); 3282774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 3291da177e4SLinus Torvalds }; 3301da177e4SLinus Torvalds 331a2817d8bSFlorian Westphal int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); 332a2817d8bSFlorian Westphal void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); 333d511337aSJoe Perches void km_policy_notify(struct xfrm_policy *xp, int dir, 334d511337aSJoe Perches const struct km_event *c); 335d511337aSJoe Perches void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds struct xfrm_tmpl; 338d511337aSJoe Perches int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, 339d511337aSJoe Perches struct xfrm_policy *pol); 340d511337aSJoe Perches void km_state_expired(struct xfrm_state *x, int hard, u32 portid); 341d511337aSJoe Perches int __xfrm_state_delete(struct xfrm_state *x); 34253bc6b4dSJamal Hadi Salim 3431da177e4SLinus Torvalds struct xfrm_state_afinfo { 34417c2a42aSHerbert Xu unsigned int family; 34536cf9acfSHerbert Xu unsigned int proto; 3468e3d716cSAl Viro __be16 eth_proto; 34717c2a42aSHerbert Xu struct module *owner; 348533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 3499d389d7fSSteffen Klassert const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX]; 350aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 3519d389d7fSSteffen Klassert 352d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 35373e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 35473e5ebb2SDavid S. Miller const struct flowi *fl); 35519bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 35619bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 35719bd6244SDavid S. Miller const xfrm_address_t *daddr, 35819bd6244SDavid S. Miller const xfrm_address_t *saddr); 35941a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 36041a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 361ede2059dSEric W. Biederman int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); 3627026b1ddSDavid Miller int (*output_finish)(struct sock *sk, struct sk_buff *skb); 363227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 364227620e2SHerbert Xu struct sk_buff *skb); 36536cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 36636cf9acfSHerbert Xu struct sk_buff *skb); 367716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 368716062fdSHerbert Xu int async); 369628e341fSHannes Frederic Sowa void (*local_error)(struct sk_buff *skb, u32 mtu); 3701da177e4SLinus Torvalds }; 3711da177e4SLinus Torvalds 372d511337aSJoe Perches int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 373d511337aSJoe Perches int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 374d511337aSJoe Perches struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); 375711059b9SFlorian Westphal struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); 3761da177e4SLinus Torvalds 3772f32b51bSSteffen Klassert struct xfrm_input_afinfo { 3782f32b51bSSteffen Klassert unsigned int family; 3792f32b51bSSteffen Klassert int (*callback)(struct sk_buff *skb, u8 protocol, 3802f32b51bSSteffen Klassert int err); 3812f32b51bSSteffen Klassert }; 3822f32b51bSSteffen Klassert 383960fdfdeSFlorian Westphal int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); 384960fdfdeSFlorian Westphal int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); 3852f32b51bSSteffen Klassert 386b48c05abSSteffen Klassert void xfrm_flush_gc(void); 387d511337aSJoe Perches void xfrm_state_delete_tunnel(struct xfrm_state *x); 3881da177e4SLinus Torvalds 389fd2c3ef7SEric Dumazet struct xfrm_type { 3901da177e4SLinus Torvalds char *description; 3911da177e4SLinus Torvalds struct module *owner; 392a6337463Sjamal u8 proto; 393a6337463Sjamal u8 flags; 3941b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 395436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 396f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 397f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3981da177e4SLinus Torvalds 39972cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 4001da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 401e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 4021da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 4038f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 4048f029de2SDavid S. Miller const struct flowi *); 405aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 4061da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 407c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 4081da177e4SLinus Torvalds }; 4091da177e4SLinus Torvalds 410d511337aSJoe Perches int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 411d511337aSJoe Perches int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 4121da177e4SLinus Torvalds 4139d389d7fSSteffen Klassert struct xfrm_type_offload { 4149d389d7fSSteffen Klassert char *description; 4159d389d7fSSteffen Klassert struct module *owner; 4169d389d7fSSteffen Klassert u8 proto; 4179d389d7fSSteffen Klassert void (*encap)(struct xfrm_state *, struct sk_buff *pskb); 4189d389d7fSSteffen Klassert int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); 4199d389d7fSSteffen Klassert int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); 4209d389d7fSSteffen Klassert }; 4219d389d7fSSteffen Klassert 4229d389d7fSSteffen Klassert int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); 4239d389d7fSSteffen Klassert int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); 4249d389d7fSSteffen Klassert 425b59f45d0SHerbert Xu struct xfrm_mode { 426227620e2SHerbert Xu /* 427227620e2SHerbert Xu * Remove encapsulation header. 428227620e2SHerbert Xu * 429227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 430227620e2SHerbert Xu * header. 431227620e2SHerbert Xu * 432227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 433227620e2SHerbert Xu * should be and the network header shall be set to where the IP 434227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 435227620e2SHerbert Xu * payload. 436227620e2SHerbert Xu */ 437227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 438227620e2SHerbert Xu 439227620e2SHerbert Xu /* 440227620e2SHerbert Xu * This is the actual input entry point. 441227620e2SHerbert Xu * 442227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 443227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 444227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 445227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 446227620e2SHerbert Xu */ 447b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 44837fedd3aSHerbert Xu 44937fedd3aSHerbert Xu /* 45037fedd3aSHerbert Xu * Add encapsulation header. 45137fedd3aSHerbert Xu * 45237fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 45337fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 45437fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 45537fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 45637fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 45737fedd3aSHerbert Xu * header. The value of the network header will always point 45837fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 45937fedd3aSHerbert Xu */ 46036cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 46136cf9acfSHerbert Xu 46236cf9acfSHerbert Xu /* 46336cf9acfSHerbert Xu * This is the actual output entry point. 46436cf9acfSHerbert Xu * 46536cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 46636cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 46736cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 46836cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 46936cf9acfSHerbert Xu * call output2. 47036cf9acfSHerbert Xu */ 471eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 472b59f45d0SHerbert Xu 473c35fe410SSteffen Klassert /* 474c35fe410SSteffen Klassert * Adjust pointers into the packet and do GSO segmentation. 475c35fe410SSteffen Klassert */ 476c35fe410SSteffen Klassert struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features); 477c35fe410SSteffen Klassert 478c35fe410SSteffen Klassert /* 479c35fe410SSteffen Klassert * Adjust pointers into the packet when IPsec is done at layer2. 480c35fe410SSteffen Klassert */ 481c35fe410SSteffen Klassert void (*xmit)(struct xfrm_state *x, struct sk_buff *skb); 482c35fe410SSteffen Klassert 48317c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 484b59f45d0SHerbert Xu struct module *owner; 485b59f45d0SHerbert Xu unsigned int encap; 4861bfcb10fSHerbert Xu int flags; 4871bfcb10fSHerbert Xu }; 4881bfcb10fSHerbert Xu 4891bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4901bfcb10fSHerbert Xu enum { 4911bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 492b59f45d0SHerbert Xu }; 493b59f45d0SHerbert Xu 494d511337aSJoe Perches int xfrm_register_mode(struct xfrm_mode *mode, int family); 495d511337aSJoe Perches int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 496b59f45d0SHerbert Xu 497df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 498df9dcb45SKazunori MIYAZAWA { 499df9dcb45SKazunori MIYAZAWA switch(family) { 500df9dcb45SKazunori MIYAZAWA case AF_INET: 501df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 502df9dcb45SKazunori MIYAZAWA case AF_INET6: 503df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 504df9dcb45SKazunori MIYAZAWA default: 505df9dcb45SKazunori MIYAZAWA return 0; 506df9dcb45SKazunori MIYAZAWA } 507df9dcb45SKazunori MIYAZAWA } 508df9dcb45SKazunori MIYAZAWA 509df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 510df9dcb45SKazunori MIYAZAWA { 511df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 512df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 513df9dcb45SKazunori MIYAZAWA return x->inner_mode; 514df9dcb45SKazunori MIYAZAWA else 515df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 516df9dcb45SKazunori MIYAZAWA } 517df9dcb45SKazunori MIYAZAWA 518fd2c3ef7SEric Dumazet struct xfrm_tmpl { 5191da177e4SLinus Torvalds /* id in template is interpreted as: 5201da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 5211da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 5221da177e4SLinus Torvalds * daddr must be fixed too. 5231da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 5241da177e4SLinus Torvalds */ 5251da177e4SLinus Torvalds struct xfrm_id id; 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 5281da177e4SLinus Torvalds xfrm_address_t saddr; 5291da177e4SLinus Torvalds 53076b3f055SMiika Komu unsigned short encap_family; 53176b3f055SMiika Komu 532a6337463Sjamal u32 reqid; 5331da177e4SLinus Torvalds 5347e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 535a6337463Sjamal u8 mode; 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 538a6337463Sjamal u8 share; 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 541a6337463Sjamal u8 optional; 5421da177e4SLinus Torvalds 543c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 544a6337463Sjamal u8 allalgs; 545c5d18e98SHerbert Xu 5461da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 547a6337463Sjamal u32 aalgos; 548a6337463Sjamal u32 ealgos; 549a6337463Sjamal u32 calgos; 5501da177e4SLinus Torvalds }; 5511da177e4SLinus Torvalds 552622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 55354ef207aSSteffen Klassert #define XFRM_MAX_OFFLOAD_DEPTH 1 5541da177e4SLinus Torvalds 55512a169e7SHerbert Xu struct xfrm_policy_walk_entry { 55612a169e7SHerbert Xu struct list_head all; 55712a169e7SHerbert Xu u8 dead; 55812a169e7SHerbert Xu }; 55912a169e7SHerbert Xu 56012a169e7SHerbert Xu struct xfrm_policy_walk { 56112a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 56212a169e7SHerbert Xu u8 type; 56312a169e7SHerbert Xu u32 seq; 56412a169e7SHerbert Xu }; 56512a169e7SHerbert Xu 566a0073fe1SSteffen Klassert struct xfrm_policy_queue { 567a0073fe1SSteffen Klassert struct sk_buff_head hold_queue; 568a0073fe1SSteffen Klassert struct timer_list hold_timer; 569a0073fe1SSteffen Klassert unsigned long timeout; 570a0073fe1SSteffen Klassert }; 571a0073fe1SSteffen Klassert 572fd2c3ef7SEric Dumazet struct xfrm_policy { 5730c5c9fb5SEric W. Biederman possible_net_t xp_net; 5742518c7c2SDavid S. Miller struct hlist_node bydst; 5752518c7c2SDavid S. Miller struct hlist_node byidx; 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5781da177e4SLinus Torvalds rwlock_t lock; 579850a6212SReshetova, Elena refcount_t refcnt; 5806be3b0dbSFlorian Westphal u32 pos; 5811da177e4SLinus Torvalds struct timer_list timer; 5821da177e4SLinus Torvalds 58380c802f3STimo Teräs atomic_t genid; 5841da177e4SLinus Torvalds u32 priority; 5851da177e4SLinus Torvalds u32 index; 5867e652640SSteffen Klassert u32 if_id; 587bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5881da177e4SLinus Torvalds struct xfrm_selector selector; 5891da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5901da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 59112a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 592a0073fe1SSteffen Klassert struct xfrm_policy_queue polq; 5939cf545ebSFlorian Westphal bool bydst_reinsert; 59446ca5f5dSArnaldo Carvalho de Melo u8 type; 59546ca5f5dSArnaldo Carvalho de Melo u8 action; 59646ca5f5dSArnaldo Carvalho de Melo u8 flags; 59746ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 59812a169e7SHerbert Xu u16 family; 599df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 6001da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 60124969facSFlorian Westphal struct hlist_node bydst_inexact_list; 60256f04730SEric Dumazet struct rcu_head rcu; 6031da177e4SLinus Torvalds }; 6041da177e4SLinus Torvalds 60563eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 6060331b1f3SAlexey Dobriyan { 6070331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 6080331b1f3SAlexey Dobriyan } 6090331b1f3SAlexey Dobriyan 61013c1d189SArnaud Ebalard struct xfrm_kmaddress { 61113c1d189SArnaud Ebalard xfrm_address_t local; 61213c1d189SArnaud Ebalard xfrm_address_t remote; 61313c1d189SArnaud Ebalard u32 reserved; 61413c1d189SArnaud Ebalard u16 family; 61513c1d189SArnaud Ebalard }; 61613c1d189SArnaud Ebalard 61780c9abaaSShinta Sugimoto struct xfrm_migrate { 61880c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 61980c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 62080c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 62180c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 62280c9abaaSShinta Sugimoto u8 proto; 62380c9abaaSShinta Sugimoto u8 mode; 62480c9abaaSShinta Sugimoto u16 reserved; 62580c9abaaSShinta Sugimoto u32 reqid; 62680c9abaaSShinta Sugimoto u16 old_family; 62780c9abaaSShinta Sugimoto u16 new_family; 62880c9abaaSShinta Sugimoto }; 62980c9abaaSShinta Sugimoto 6301da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 631f8cd5488SJamal Hadi Salim /* what happened */ 632f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 633f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 634f8cd5488SJamal Hadi Salim 635f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 636f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 637f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 638f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 639f8cd5488SJamal Hadi Salim /* default seq threshold size */ 640f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 6411da177e4SLinus Torvalds 642fd2c3ef7SEric Dumazet struct xfrm_mgr { 6431da177e4SLinus Torvalds struct list_head list; 644214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 64565e0736bSFan Du int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); 646cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 6475d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 648214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 649db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 650183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 651183cad12SDavid S. Miller u8 dir, u8 type, 652183cad12SDavid S. Miller const struct xfrm_migrate *m, 653183cad12SDavid S. Miller int num_bundles, 6548bafd730SAntony Antony const struct xfrm_kmaddress *k, 6558bafd730SAntony Antony const struct xfrm_encap_tmpl *encap); 6560f24558eSHoria Geanta bool (*is_alive)(const struct km_event *c); 6571da177e4SLinus Torvalds }; 6581da177e4SLinus Torvalds 659d511337aSJoe Perches int xfrm_register_km(struct xfrm_mgr *km); 660d511337aSJoe Perches int xfrm_unregister_km(struct xfrm_mgr *km); 6611da177e4SLinus Torvalds 66270be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb { 66370be6c91SSteffen Klassert union { 66470be6c91SSteffen Klassert struct inet_skb_parm h4; 66570be6c91SSteffen Klassert struct inet6_skb_parm h6; 66670be6c91SSteffen Klassert } header; 66770be6c91SSteffen Klassert 66870be6c91SSteffen Klassert union { 66970be6c91SSteffen Klassert struct ip_tunnel *ip4; 67070be6c91SSteffen Klassert struct ip6_tnl *ip6; 67170be6c91SSteffen Klassert } tunnel; 67270be6c91SSteffen Klassert }; 67370be6c91SSteffen Klassert 67470be6c91SSteffen Klassert #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) 67570be6c91SSteffen Klassert 676436a0a40SHerbert Xu /* 677436a0a40SHerbert Xu * This structure is used for the duration where packets are being 678436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 679436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 680436a0a40SHerbert Xu */ 681436a0a40SHerbert Xu struct xfrm_skb_cb { 68270be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 683436a0a40SHerbert Xu 684436a0a40SHerbert Xu /* Sequence number for replay protection. */ 685b318e0e4SHerbert Xu union { 6861ce3644aSSteffen Klassert struct { 6871ce3644aSSteffen Klassert __u32 low; 6881ce3644aSSteffen Klassert __u32 hi; 6891ce3644aSSteffen Klassert } output; 6901ce3644aSSteffen Klassert struct { 6911ce3644aSSteffen Klassert __be32 low; 6921ce3644aSSteffen Klassert __be32 hi; 6931ce3644aSSteffen Klassert } input; 694b318e0e4SHerbert Xu } seq; 695436a0a40SHerbert Xu }; 696436a0a40SHerbert Xu 697436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 698436a0a40SHerbert Xu 69936cf9acfSHerbert Xu /* 70036cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 70136cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 70236cf9acfSHerbert Xu */ 70336cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 70470be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 70536cf9acfSHerbert Xu 70636cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 70736cf9acfSHerbert Xu __be16 id; 70836cf9acfSHerbert Xu __be16 frag_off; 70936cf9acfSHerbert Xu 710732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 711732c8bd5SHerbert Xu u8 ihl; 712732c8bd5SHerbert Xu 71336cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 71436cf9acfSHerbert Xu u8 tos; 71536cf9acfSHerbert Xu 71636cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 71736cf9acfSHerbert Xu u8 ttl; 71836cf9acfSHerbert Xu 71936cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 72036cf9acfSHerbert Xu u8 protocol; 72136cf9acfSHerbert Xu 722732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 723732c8bd5SHerbert Xu u8 optlen; 724732c8bd5SHerbert Xu 72536cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 72636cf9acfSHerbert Xu u8 flow_lbl[3]; 72736cf9acfSHerbert Xu }; 72836cf9acfSHerbert Xu 72936cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 73036cf9acfSHerbert Xu 731716062fdSHerbert Xu /* 732716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 733716062fdSHerbert Xu * related information. 734716062fdSHerbert Xu */ 735716062fdSHerbert Xu struct xfrm_spi_skb_cb { 73670be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 737716062fdSHerbert Xu 738716062fdSHerbert Xu unsigned int daddroff; 7392fcb45b6SHerbert Xu unsigned int family; 7407785bba2SSteffen Klassert __be32 seq; 741716062fdSHerbert Xu }; 742716062fdSHerbert Xu 743716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 744716062fdSHerbert Xu 745c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 746afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 747ab5f5e8bSJoy Latten { 748ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 749ab5f5e8bSJoy Latten 750f7859590SRichard Guy Briggs if (audit_enabled == AUDIT_OFF) 751afeb14b4SPaul Moore return NULL; 752cdfb6b34SRichard Guy Briggs audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, 753ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 754ab5f5e8bSJoy Latten if (audit_buf == NULL) 755ab5f5e8bSJoy Latten return NULL; 756afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 757afeb14b4SPaul Moore return audit_buf; 758afeb14b4SPaul Moore } 759afeb14b4SPaul Moore 7602e71029eSTetsuo Handa static inline void xfrm_audit_helper_usrinfo(bool task_valid, 761afeb14b4SPaul Moore struct audit_buffer *audit_buf) 762afeb14b4SPaul Moore { 7632e71029eSTetsuo Handa const unsigned int auid = from_kuid(&init_user_ns, task_valid ? 7642e71029eSTetsuo Handa audit_get_loginuid(current) : 7652e71029eSTetsuo Handa INVALID_UID); 7662e71029eSTetsuo Handa const unsigned int ses = task_valid ? audit_get_sessionid(current) : 767f0b75216SRichard Guy Briggs AUDIT_SID_UNSET; 7682e71029eSTetsuo Handa 7692e71029eSTetsuo Handa audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 770ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 771ab5f5e8bSJoy Latten } 772ab5f5e8bSJoy Latten 7732e71029eSTetsuo Handa void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); 7742e71029eSTetsuo Handa void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7752e71029eSTetsuo Handa bool task_valid); 7762e71029eSTetsuo Handa void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); 7772e71029eSTetsuo Handa void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); 778d511337aSJoe Perches void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 779afeb14b4SPaul Moore struct sk_buff *skb); 780d511337aSJoe Perches void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, 781d511337aSJoe Perches __be32 net_seq); 782d511337aSJoe Perches void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 783d511337aSJoe Perches void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, 784d511337aSJoe Perches __be32 net_seq); 785d511337aSJoe Perches void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, 786d511337aSJoe Perches u8 proto); 787c9204d9cSJoy Latten #else 78841fef0eeSMarcin Slusarz 78941fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7902e71029eSTetsuo Handa bool task_valid) 79141fef0eeSMarcin Slusarz { 79241fef0eeSMarcin Slusarz } 79341fef0eeSMarcin Slusarz 79441fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7952e71029eSTetsuo Handa bool task_valid) 79641fef0eeSMarcin Slusarz { 79741fef0eeSMarcin Slusarz } 79841fef0eeSMarcin Slusarz 79941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 8002e71029eSTetsuo Handa bool task_valid) 80141fef0eeSMarcin Slusarz { 80241fef0eeSMarcin Slusarz } 80341fef0eeSMarcin Slusarz 80441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 8052e71029eSTetsuo Handa bool task_valid) 80641fef0eeSMarcin Slusarz { 80741fef0eeSMarcin Slusarz } 80841fef0eeSMarcin Slusarz 80941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 81041fef0eeSMarcin Slusarz struct sk_buff *skb) 81141fef0eeSMarcin Slusarz { 81241fef0eeSMarcin Slusarz } 81341fef0eeSMarcin Slusarz 8149fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 8159fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 8169fdc4883SSteffen Klassert { 8179fdc4883SSteffen Klassert } 8189fdc4883SSteffen Klassert 81941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 82041fef0eeSMarcin Slusarz u16 family) 82141fef0eeSMarcin Slusarz { 82241fef0eeSMarcin Slusarz } 82341fef0eeSMarcin Slusarz 82441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 82541fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 82641fef0eeSMarcin Slusarz { 82741fef0eeSMarcin Slusarz } 82841fef0eeSMarcin Slusarz 82941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 83041fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 83141fef0eeSMarcin Slusarz { 83241fef0eeSMarcin Slusarz } 833c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 834161a09e7SJoy Latten 8351da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 8361da177e4SLinus Torvalds { 8371da177e4SLinus Torvalds if (likely(policy != NULL)) 838850a6212SReshetova, Elena refcount_inc(&policy->refcnt); 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 841d511337aSJoe Perches void xfrm_policy_destroy(struct xfrm_policy *policy); 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 8441da177e4SLinus Torvalds { 845850a6212SReshetova, Elena if (refcount_dec_and_test(&policy->refcnt)) 84664c31b3fSWANG Cong xfrm_policy_destroy(policy); 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds 8494e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 8504e81bb83SMasahide NAKAMURA { 8514e81bb83SMasahide NAKAMURA int i; 8524e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 8534e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 8544e81bb83SMasahide NAKAMURA } 8554e81bb83SMasahide NAKAMURA 856d511337aSJoe Perches void __xfrm_state_destroy(struct xfrm_state *); 8571da177e4SLinus Torvalds 85821380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 85921380b81SHerbert Xu { 86088755e9cSReshetova, Elena refcount_dec(&x->refcnt); 86121380b81SHerbert Xu } 86221380b81SHerbert Xu 8631da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 8641da177e4SLinus Torvalds { 86588755e9cSReshetova, Elena if (refcount_dec_and_test(&x->refcnt)) 8661da177e4SLinus Torvalds __xfrm_state_destroy(x); 8671da177e4SLinus Torvalds } 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8701da177e4SLinus Torvalds { 87188755e9cSReshetova, Elena refcount_inc(&x->refcnt); 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds 8741744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 875e1b0048eSAlexey Dobriyan unsigned int prefixlen) 8761da177e4SLinus Torvalds { 8771744a8feSDavid S. Miller const __be32 *a1 = token1; 8781744a8feSDavid S. Miller const __be32 *a2 = token2; 879e1b0048eSAlexey Dobriyan unsigned int pdw; 880e1b0048eSAlexey Dobriyan unsigned int pbi; 8811da177e4SLinus Torvalds 882a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8831da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8841da177e4SLinus Torvalds 8851da177e4SLinus Torvalds if (pdw) 8861da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8871744a8feSDavid S. Miller return false; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds if (pbi) { 8905f19343fSAl Viro __be32 mask; 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8951744a8feSDavid S. Miller return false; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds 8981744a8feSDavid S. Miller return true; 8991da177e4SLinus Torvalds } 9001da177e4SLinus Torvalds 90126bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 90226bff940SAlexey Dobriyan { 90326bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 9046c786bcbSAlexey Dobriyan if (sizeof(long) == 4 && prefixlen == 0) 90526bff940SAlexey Dobriyan return true; 9066c786bcbSAlexey Dobriyan return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); 90726bff940SAlexey Dobriyan } 90826bff940SAlexey Dobriyan 9091da177e4SLinus Torvalds static __inline__ 9106281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 9111da177e4SLinus Torvalds { 912f9d07e41SAl Viro __be16 port; 9131d28f42cSDavid S. Miller switch(fl->flowi_proto) { 9141da177e4SLinus Torvalds case IPPROTO_TCP: 9151da177e4SLinus Torvalds case IPPROTO_UDP: 916ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 9171da177e4SLinus Torvalds case IPPROTO_SCTP: 9186281dcc9SDavid S. Miller port = uli->ports.sport; 9191da177e4SLinus Torvalds break; 9201da177e4SLinus Torvalds case IPPROTO_ICMP: 9211da177e4SLinus Torvalds case IPPROTO_ICMPV6: 9226281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 9231da177e4SLinus Torvalds break; 9242ce4272aSMasahide NAKAMURA case IPPROTO_MH: 9256281dcc9SDavid S. Miller port = htons(uli->mht.type); 9262ce4272aSMasahide NAKAMURA break; 927cc9ff19dSTimo Teräs case IPPROTO_GRE: 9286281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 929cc9ff19dSTimo Teräs break; 9301da177e4SLinus Torvalds default: 9311da177e4SLinus Torvalds port = 0; /*XXX*/ 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds return port; 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds static __inline__ 9376281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 9381da177e4SLinus Torvalds { 939f9d07e41SAl Viro __be16 port; 9401d28f42cSDavid S. Miller switch(fl->flowi_proto) { 9411da177e4SLinus Torvalds case IPPROTO_TCP: 9421da177e4SLinus Torvalds case IPPROTO_UDP: 943ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 9441da177e4SLinus Torvalds case IPPROTO_SCTP: 9456281dcc9SDavid S. Miller port = uli->ports.dport; 9461da177e4SLinus Torvalds break; 9471da177e4SLinus Torvalds case IPPROTO_ICMP: 9481da177e4SLinus Torvalds case IPPROTO_ICMPV6: 9496281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 9501da177e4SLinus Torvalds break; 951cc9ff19dSTimo Teräs case IPPROTO_GRE: 9526281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 953cc9ff19dSTimo Teräs break; 9541da177e4SLinus Torvalds default: 9551da177e4SLinus Torvalds port = 0; /*XXX*/ 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds return port; 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 960d511337aSJoe Perches bool xfrm_selector_match(const struct xfrm_selector *sel, 961d511337aSJoe Perches const struct flowi *fl, unsigned short family); 9621da177e4SLinus Torvalds 963df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 964df71837dSTrent Jaeger /* If neither has a context --> match 965df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 966df71837dSTrent Jaeger */ 967bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 968df71837dSTrent Jaeger { 969df71837dSTrent Jaeger return ((!s1 && !s2) || 970df71837dSTrent Jaeger (s1 && s2 && 971df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 972df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 973df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 974df71837dSTrent Jaeger } 975df71837dSTrent Jaeger #else 976bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 977df71837dSTrent Jaeger { 978bc9b35adSDavid S. Miller return true; 979df71837dSTrent Jaeger } 980df71837dSTrent Jaeger #endif 981df71837dSTrent Jaeger 9821da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9831da177e4SLinus Torvalds * 984b6ca8bd5SDavid Miller * xdst->child points to the next element of bundle. 9851da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9861da177e4SLinus Torvalds * 9871da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9881da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9891da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9901da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9911da177e4SLinus Torvalds * policy rule. 9921da177e4SLinus Torvalds */ 993fd2c3ef7SEric Dumazet struct xfrm_dst { 9941da177e4SLinus Torvalds union { 9951da177e4SLinus Torvalds struct dst_entry dst; 9961da177e4SLinus Torvalds struct rtable rt; 9971da177e4SLinus Torvalds struct rt6_info rt6; 9981da177e4SLinus Torvalds } u; 9991da177e4SLinus Torvalds struct dst_entry *route; 1000b6ca8bd5SDavid Miller struct dst_entry *child; 10010f6c480fSDavid Miller struct dst_entry *path; 100280c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 100380c802f3STimo Teräs int num_pols, num_xfrms; 100480c802f3STimo Teräs u32 xfrm_genid; 100580c802f3STimo Teräs u32 policy_genid; 10061da177e4SLinus Torvalds u32 route_mtu_cached; 10071da177e4SLinus Torvalds u32 child_mtu_cached; 100892d63decSHideaki YOSHIFUJI u32 route_cookie; 100992d63decSHideaki YOSHIFUJI u32 path_cookie; 10101da177e4SLinus Torvalds }; 10111da177e4SLinus Torvalds 10120f6c480fSDavid Miller static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) 10130f6c480fSDavid Miller { 10140f6c480fSDavid Miller #ifdef CONFIG_XFRM 10150f6c480fSDavid Miller if (dst->xfrm) { 10160f6c480fSDavid Miller const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; 10170f6c480fSDavid Miller 10180f6c480fSDavid Miller return xdst->path; 10190f6c480fSDavid Miller } 10200f6c480fSDavid Miller #endif 10210f6c480fSDavid Miller return (struct dst_entry *) dst; 10220f6c480fSDavid Miller } 10230f6c480fSDavid Miller 1024b92cf4aaSDavid Miller static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) 1025b92cf4aaSDavid Miller { 1026b92cf4aaSDavid Miller #ifdef CONFIG_XFRM 1027b6ca8bd5SDavid Miller if (dst->xfrm) { 1028b6ca8bd5SDavid Miller struct xfrm_dst *xdst = (struct xfrm_dst *) dst; 1029b6ca8bd5SDavid Miller return xdst->child; 1030b6ca8bd5SDavid Miller } 1031b92cf4aaSDavid Miller #endif 1032b92cf4aaSDavid Miller return NULL; 1033b92cf4aaSDavid Miller } 1034b92cf4aaSDavid Miller 1035def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 103645b018beSDavid Miller static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) 103745b018beSDavid Miller { 1038b6ca8bd5SDavid Miller xdst->child = child; 103945b018beSDavid Miller } 104045b018beSDavid Miller 1041aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 1042aabc9761SHerbert Xu { 104380c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 1044aabc9761SHerbert Xu dst_release(xdst->route); 1045aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 1046aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 1047aabc9761SHerbert Xu } 1048def8b4faSAlexey Dobriyan #endif 1049aabc9761SHerbert Xu 1050d511337aSJoe Perches void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 1051aabc9761SHerbert Xu 1052f203b76dSSteffen Klassert struct xfrm_if_parms { 1053f203b76dSSteffen Klassert char name[IFNAMSIZ]; /* name of XFRM device */ 1054f203b76dSSteffen Klassert int link; /* ifindex of underlying L2 interface */ 1055f203b76dSSteffen Klassert u32 if_id; /* interface identifyer */ 1056f203b76dSSteffen Klassert }; 1057f203b76dSSteffen Klassert 1058f203b76dSSteffen Klassert struct xfrm_if { 1059f203b76dSSteffen Klassert struct xfrm_if __rcu *next; /* next interface in list */ 1060f203b76dSSteffen Klassert struct net_device *dev; /* virtual device associated with interface */ 1061f203b76dSSteffen Klassert struct net_device *phydev; /* physical device */ 1062f203b76dSSteffen Klassert struct net *net; /* netns for packet i/o */ 1063f203b76dSSteffen Klassert struct xfrm_if_parms p; /* interface parms */ 1064f203b76dSSteffen Klassert 1065f203b76dSSteffen Klassert struct gro_cells gro_cells; 1066f203b76dSSteffen Klassert }; 1067f203b76dSSteffen Klassert 106854ef207aSSteffen Klassert struct xfrm_offload { 106954ef207aSSteffen Klassert /* Output sequence number for replay protection on offloading. */ 107054ef207aSSteffen Klassert struct { 107154ef207aSSteffen Klassert __u32 low; 107254ef207aSSteffen Klassert __u32 hi; 107354ef207aSSteffen Klassert } seq; 107454ef207aSSteffen Klassert 107554ef207aSSteffen Klassert __u32 flags; 107654ef207aSSteffen Klassert #define SA_DELETE_REQ 1 107754ef207aSSteffen Klassert #define CRYPTO_DONE 2 107854ef207aSSteffen Klassert #define CRYPTO_NEXT_DONE 4 107954ef207aSSteffen Klassert #define CRYPTO_FALLBACK 8 108054ef207aSSteffen Klassert #define XFRM_GSO_SEGMENT 16 108154ef207aSSteffen Klassert #define XFRM_GRO 32 108247ebcc0bSYossi Kuperman #define XFRM_ESP_NO_TRAILER 64 1083f53c7239SSteffen Klassert #define XFRM_DEV_RESUME 128 108454ef207aSSteffen Klassert 108554ef207aSSteffen Klassert __u32 status; 108654ef207aSSteffen Klassert #define CRYPTO_SUCCESS 1 108754ef207aSSteffen Klassert #define CRYPTO_GENERIC_ERROR 2 108854ef207aSSteffen Klassert #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 108954ef207aSSteffen Klassert #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 109054ef207aSSteffen Klassert #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 109154ef207aSSteffen Klassert #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 109254ef207aSSteffen Klassert #define CRYPTO_INVALID_PACKET_SYNTAX 64 109354ef207aSSteffen Klassert #define CRYPTO_INVALID_PROTOCOL 128 109454ef207aSSteffen Klassert 109554ef207aSSteffen Klassert __u8 proto; 109654ef207aSSteffen Klassert }; 109754ef207aSSteffen Klassert 1098fd2c3ef7SEric Dumazet struct sec_path { 109955eabed6SReshetova, Elena refcount_t refcnt; 11001da177e4SLinus Torvalds int len; 110154ef207aSSteffen Klassert int olen; 110254ef207aSSteffen Klassert 1103dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 110454ef207aSSteffen Klassert struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; 11051da177e4SLinus Torvalds }; 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds static inline struct sec_path * 11081da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 11091da177e4SLinus Torvalds { 11101da177e4SLinus Torvalds if (sp) 111155eabed6SReshetova, Elena refcount_inc(&sp->refcnt); 11121da177e4SLinus Torvalds return sp; 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds 1115d511337aSJoe Perches void __secpath_destroy(struct sec_path *sp); 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds static inline void 11181da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 11191da177e4SLinus Torvalds { 112055eabed6SReshetova, Elena if (sp && refcount_dec_and_test(&sp->refcnt)) 11211da177e4SLinus Torvalds __secpath_destroy(sp); 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds 1124d511337aSJoe Perches struct sec_path *secpath_dup(struct sec_path *src); 11250ca64da1SFlorian Westphal struct sec_path *secpath_set(struct sk_buff *skb); 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds static inline void 11281da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds #ifdef CONFIG_XFRM 11311da177e4SLinus Torvalds secpath_put(skb->sp); 11321da177e4SLinus Torvalds skb->sp = NULL; 11331da177e4SLinus Torvalds #endif 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds static inline int 11376cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1138a1e59abfSPatrick McHardy { 1139a1e59abfSPatrick McHardy switch (family) { 1140a1e59abfSPatrick McHardy case AF_INET: 1141a1e59abfSPatrick McHardy return addr->a4 == 0; 1142a1e59abfSPatrick McHardy case AF_INET6: 114315e318bdSJiri Benc return ipv6_addr_any(&addr->in6); 1144a1e59abfSPatrick McHardy } 1145a1e59abfSPatrick McHardy return 0; 1146a1e59abfSPatrick McHardy } 1147a1e59abfSPatrick McHardy 1148a1e59abfSPatrick McHardy static inline int 114921eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 11501da177e4SLinus Torvalds { 11511da177e4SLinus Torvalds return (tmpl->saddr.a4 && 11521da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds 11551da177e4SLinus Torvalds static inline int 115621eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 11571da177e4SLinus Torvalds { 11581da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 1159ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 11601da177e4SLinus Torvalds } 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds static inline int 116321eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 11641da177e4SLinus Torvalds { 11651da177e4SLinus Torvalds switch (family) { 11661da177e4SLinus Torvalds case AF_INET: 11671da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 11681da177e4SLinus Torvalds case AF_INET6: 11691da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds return !0; 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1175d511337aSJoe Perches int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, 1176d511337aSJoe Perches unsigned short family); 11771da177e4SLinus Torvalds 1178d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1179d5422efeSHerbert Xu struct sk_buff *skb, 1180d5422efeSHerbert Xu unsigned int family, int reverse) 11811da177e4SLinus Torvalds { 1182f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1183d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1184d5422efeSHerbert Xu 11851da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1186d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 11871da177e4SLinus Torvalds 118826912e37SFlorian Westphal return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) || 1189adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1190d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1191d5422efeSHerbert Xu } 1192d5422efeSHerbert Xu 1193d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1194d5422efeSHerbert Xu { 1195d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds 11981da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11991da177e4SLinus Torvalds { 12001da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 12041da177e4SLinus Torvalds { 12051da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds 1208d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1209d5422efeSHerbert Xu struct sk_buff *skb) 1210d5422efeSHerbert Xu { 1211d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1212d5422efeSHerbert Xu } 1213d5422efeSHerbert Xu 1214d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1215d5422efeSHerbert Xu struct sk_buff *skb) 1216d5422efeSHerbert Xu { 1217d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1218d5422efeSHerbert Xu } 1219d5422efeSHerbert Xu 1220d511337aSJoe Perches int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1221d5422efeSHerbert Xu unsigned int family, int reverse); 1222d5422efeSHerbert Xu 1223d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1224d5422efeSHerbert Xu unsigned int family) 1225d5422efeSHerbert Xu { 1226d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1227d5422efeSHerbert Xu } 1228d5422efeSHerbert Xu 1229d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1230d5422efeSHerbert Xu struct flowi *fl, 1231d5422efeSHerbert Xu unsigned int family) 1232d5422efeSHerbert Xu { 1233d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1234d5422efeSHerbert Xu } 1235d5422efeSHerbert Xu 1236d511337aSJoe Perches int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 12371da177e4SLinus Torvalds 12381da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 12391da177e4SLinus Torvalds { 124099a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 124199a66657SAlexey Dobriyan 124299a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1243adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 12441da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 12481da177e4SLinus Torvalds { 12491da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 12531da177e4SLinus Torvalds { 12541da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds 1257d188ba86SEric Dumazet int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); 12581da177e4SLinus Torvalds 1259d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) 12601da177e4SLinus Torvalds { 1261d188ba86SEric Dumazet sk->sk_policy[0] = NULL; 1262d188ba86SEric Dumazet sk->sk_policy[1] = NULL; 1263d188ba86SEric Dumazet if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) 1264d188ba86SEric Dumazet return __xfrm_sk_clone_policy(sk, osk); 12651da177e4SLinus Torvalds return 0; 12661da177e4SLinus Torvalds } 12671da177e4SLinus Torvalds 1268d511337aSJoe Perches int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 12711da177e4SLinus Torvalds { 1272d188ba86SEric Dumazet struct xfrm_policy *pol; 1273d188ba86SEric Dumazet 1274d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[0], 1); 1275d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1276d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX); 12771da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 12781da177e4SLinus Torvalds } 1279d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[1], 1); 1280d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1281d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); 12821da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 12831da177e4SLinus Torvalds } 12841da177e4SLinus Torvalds } 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds #else 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 1289d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } 12901da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 12911da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 12921da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 12931da177e4SLinus Torvalds { 12941da177e4SLinus Torvalds return 1; 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 12971da177e4SLinus Torvalds { 12981da177e4SLinus Torvalds return 1; 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 13011da177e4SLinus Torvalds { 13021da177e4SLinus Torvalds return 1; 13031da177e4SLinus Torvalds } 1304d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1305d5422efeSHerbert Xu struct flowi *fl, 1306d5422efeSHerbert Xu unsigned int family) 1307d5422efeSHerbert Xu { 1308d5422efeSHerbert Xu return -ENOSYS; 1309d5422efeSHerbert Xu } 1310d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1311d5422efeSHerbert Xu struct sk_buff *skb) 1312d5422efeSHerbert Xu { 1313d5422efeSHerbert Xu return 1; 1314d5422efeSHerbert Xu } 1315d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1316d5422efeSHerbert Xu struct sk_buff *skb) 1317d5422efeSHerbert Xu { 1318d5422efeSHerbert Xu return 1; 1319d5422efeSHerbert Xu } 13201da177e4SLinus Torvalds #endif 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvalds static __inline__ 1323e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 13241da177e4SLinus Torvalds { 13251da177e4SLinus Torvalds switch (family){ 13261da177e4SLinus Torvalds case AF_INET: 13277e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 13281da177e4SLinus Torvalds case AF_INET6: 13297e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds return NULL; 13321da177e4SLinus Torvalds } 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds static __inline__ 1335e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 13361da177e4SLinus Torvalds { 13371da177e4SLinus Torvalds switch (family){ 13381da177e4SLinus Torvalds case AF_INET: 13397e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 13401da177e4SLinus Torvalds case AF_INET6: 13417e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 13421da177e4SLinus Torvalds } 13431da177e4SLinus Torvalds return NULL; 13441da177e4SLinus Torvalds } 13451da177e4SLinus Torvalds 13469bb182a7SYOSHIFUJI Hideaki static __inline__ 1347e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 13489bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 13499bb182a7SYOSHIFUJI Hideaki unsigned short family) 13509bb182a7SYOSHIFUJI Hideaki { 13519bb182a7SYOSHIFUJI Hideaki switch(family) { 13529bb182a7SYOSHIFUJI Hideaki case AF_INET: 13537e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 13547e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 13559bb182a7SYOSHIFUJI Hideaki break; 13569bb182a7SYOSHIFUJI Hideaki case AF_INET6: 135715e318bdSJiri Benc saddr->in6 = fl->u.ip6.saddr; 135815e318bdSJiri Benc daddr->in6 = fl->u.ip6.daddr; 13599bb182a7SYOSHIFUJI Hideaki break; 13609bb182a7SYOSHIFUJI Hideaki } 13619bb182a7SYOSHIFUJI Hideaki } 13629bb182a7SYOSHIFUJI Hideaki 13631da177e4SLinus Torvalds static __inline__ int 1364f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1365f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 13661da177e4SLinus Torvalds { 13671da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 13681da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 13691da177e4SLinus Torvalds return 1; 13701da177e4SLinus Torvalds return 0; 13711da177e4SLinus Torvalds } 13721da177e4SLinus Torvalds 13731da177e4SLinus Torvalds static __inline__ int 1374f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1375f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 13761da177e4SLinus Torvalds { 1377ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 1378ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || 13791da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 13801da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 13811da177e4SLinus Torvalds return 1; 13821da177e4SLinus Torvalds return 0; 13831da177e4SLinus Torvalds } 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds static __inline__ int 1386f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1387f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 13881da177e4SLinus Torvalds unsigned short family) 13891da177e4SLinus Torvalds { 13901da177e4SLinus Torvalds switch (family) { 13911da177e4SLinus Torvalds case AF_INET: 13921da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 13931da177e4SLinus Torvalds case AF_INET6: 13941da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds return 0; 13971da177e4SLinus Torvalds } 13981da177e4SLinus Torvalds 1399e53820deSMasahide NAKAMURA static __inline__ int 1400f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1401e53820deSMasahide NAKAMURA unsigned short family) 1402e53820deSMasahide NAKAMURA { 1403e53820deSMasahide NAKAMURA switch (family) { 1404e53820deSMasahide NAKAMURA case AF_INET: 1405e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 14067e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 14077e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1408e53820deSMasahide NAKAMURA case AF_INET6: 1409e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 14107e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 14117e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1412e53820deSMasahide NAKAMURA } 1413e53820deSMasahide NAKAMURA return 0; 1414e53820deSMasahide NAKAMURA } 1415e53820deSMasahide NAKAMURA 1416f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 14171da177e4SLinus Torvalds { 14181da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 14191da177e4SLinus Torvalds } 14201da177e4SLinus Torvalds 14215794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 14225794708fSMasahide NAKAMURA { 1423dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1424dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1425dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1426dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 14275794708fSMasahide NAKAMURA } 14285794708fSMasahide NAKAMURA 14291da177e4SLinus Torvalds /* 14301da177e4SLinus Torvalds * xfrm algorithm information 14311da177e4SLinus Torvalds */ 14321a6509d9SHerbert Xu struct xfrm_algo_aead_info { 1433165ecc63SHerbert Xu char *geniv; 14341a6509d9SHerbert Xu u16 icv_truncbits; 14351a6509d9SHerbert Xu }; 14361a6509d9SHerbert Xu 14371da177e4SLinus Torvalds struct xfrm_algo_auth_info { 14381da177e4SLinus Torvalds u16 icv_truncbits; 14391da177e4SLinus Torvalds u16 icv_fullbits; 14401da177e4SLinus Torvalds }; 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds struct xfrm_algo_encr_info { 1443165ecc63SHerbert Xu char *geniv; 14441da177e4SLinus Torvalds u16 blockbits; 14451da177e4SLinus Torvalds u16 defkeybits; 14461da177e4SLinus Torvalds }; 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds struct xfrm_algo_comp_info { 14491da177e4SLinus Torvalds u16 threshold; 14501da177e4SLinus Torvalds }; 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds struct xfrm_algo_desc { 14531da177e4SLinus Torvalds char *name; 145404ff1260SHerbert Xu char *compat; 14551da177e4SLinus Torvalds u8 available:1; 14567e50f84cSJussi Kivilinna u8 pfkey_supported:1; 14571da177e4SLinus Torvalds union { 14581a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 14591da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 14601da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 14611da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 14621da177e4SLinus Torvalds } uinfo; 14631da177e4SLinus Torvalds struct sadb_alg desc; 14641da177e4SLinus Torvalds }; 14651da177e4SLinus Torvalds 14663328715eSSteffen Klassert /* XFRM protocol handlers. */ 14673328715eSSteffen Klassert struct xfrm4_protocol { 14683328715eSSteffen Klassert int (*handler)(struct sk_buff *skb); 14693328715eSSteffen Klassert int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, 14703328715eSSteffen Klassert int encap_type); 14713328715eSSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 14723328715eSSteffen Klassert int (*err_handler)(struct sk_buff *skb, u32 info); 14733328715eSSteffen Klassert 14743328715eSSteffen Klassert struct xfrm4_protocol __rcu *next; 14753328715eSSteffen Klassert int priority; 14763328715eSSteffen Klassert }; 14773328715eSSteffen Klassert 14787e14ea15SSteffen Klassert struct xfrm6_protocol { 14797e14ea15SSteffen Klassert int (*handler)(struct sk_buff *skb); 14807e14ea15SSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 14817e14ea15SSteffen Klassert int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 14827e14ea15SSteffen Klassert u8 type, u8 code, int offset, __be32 info); 14837e14ea15SSteffen Klassert 14847e14ea15SSteffen Klassert struct xfrm6_protocol __rcu *next; 14857e14ea15SSteffen Klassert int priority; 14867e14ea15SSteffen Klassert }; 14877e14ea15SSteffen Klassert 14881da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 14891da177e4SLinus Torvalds struct xfrm_tunnel { 14901da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1491a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1492d2acc347SHerbert Xu 1493b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1494d2acc347SHerbert Xu int priority; 14951da177e4SLinus Torvalds }; 14961da177e4SLinus Torvalds 14971da177e4SLinus Torvalds struct xfrm6_tunnel { 1498d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1499d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1500d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 15016f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1502d2acc347SHerbert Xu int priority; 15031da177e4SLinus Torvalds }; 15041da177e4SLinus Torvalds 1505d511337aSJoe Perches void xfrm_init(void); 1506d511337aSJoe Perches void xfrm4_init(void); 1507d511337aSJoe Perches int xfrm_state_init(struct net *net); 1508d511337aSJoe Perches void xfrm_state_fini(struct net *net); 1509d511337aSJoe Perches void xfrm4_state_init(void); 15102f32b51bSSteffen Klassert void xfrm4_protocol_init(void); 1511c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1512d511337aSJoe Perches int xfrm6_init(void); 1513d511337aSJoe Perches void xfrm6_fini(void); 1514d511337aSJoe Perches int xfrm6_state_init(void); 1515d511337aSJoe Perches void xfrm6_state_fini(void); 15167e14ea15SSteffen Klassert int xfrm6_protocol_init(void); 15177e14ea15SSteffen Klassert void xfrm6_protocol_fini(void); 1518c35b7e72SDaniel Lezcano #else 1519c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1520c35b7e72SDaniel Lezcano { 1521c35b7e72SDaniel Lezcano return 0; 1522c35b7e72SDaniel Lezcano } 1523c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1524c35b7e72SDaniel Lezcano { 1525c35b7e72SDaniel Lezcano ; 1526c35b7e72SDaniel Lezcano } 1527c35b7e72SDaniel Lezcano #endif 15281da177e4SLinus Torvalds 1529558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1530d511337aSJoe Perches int xfrm_proc_init(struct net *net); 1531d511337aSJoe Perches void xfrm_proc_fini(struct net *net); 1532558f82efSMasahide NAKAMURA #endif 1533558f82efSMasahide NAKAMURA 1534d511337aSJoe Perches int xfrm_sysctl_init(struct net *net); 1535b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1536d511337aSJoe Perches void xfrm_sysctl_fini(struct net *net); 1537b27aeadbSAlexey Dobriyan #else 1538b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1539b27aeadbSAlexey Dobriyan { 1540b27aeadbSAlexey Dobriyan } 1541b27aeadbSAlexey Dobriyan #endif 1542b27aeadbSAlexey Dobriyan 1543d3623099SNicolas Dichtel void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, 1544870a2df4SNicolas Dichtel struct xfrm_address_filter *filter); 1545d511337aSJoe Perches int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 15464c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1547283bc9f3SFan Du void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); 1548d511337aSJoe Perches struct xfrm_state *xfrm_state_alloc(struct net *net); 1549d511337aSJoe Perches struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 155033765d06SDavid S. Miller const xfrm_address_t *saddr, 1551b520e9f6SDavid S. Miller const struct flowi *fl, 1552b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 15531da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 1554bc56b334SBenedict Wong unsigned short family, u32 if_id); 15557e652640SSteffen Klassert struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id, 15565447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1557628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1558628529b6SJamal Hadi Salim unsigned short family, 1559628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 1560c454997eSFan Du struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, 1561c454997eSFan Du unsigned short family); 1562d511337aSJoe Perches int xfrm_state_check_expire(struct xfrm_state *x); 1563d511337aSJoe Perches void xfrm_state_insert(struct xfrm_state *x); 1564d511337aSJoe Perches int xfrm_state_add(struct xfrm_state *x); 1565d511337aSJoe Perches int xfrm_state_update(struct xfrm_state *x); 1566d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1567a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1568bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1569d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1570a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1571a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1572bd55775cSJamal Hadi Salim u8 proto, 1573bd55775cSJamal Hadi Salim unsigned short family); 157441a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1575d511337aSJoe Perches int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 1576283bc9f3SFan Du unsigned short family, struct net *net); 1577d511337aSJoe Perches int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 1578d511337aSJoe Perches unsigned short family); 157941a49cc3SMasahide NAKAMURA #else 158041a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 1581283bc9f3SFan Du int n, unsigned short family, struct net *net) 158241a49cc3SMasahide NAKAMURA { 158341a49cc3SMasahide NAKAMURA return -ENOSYS; 158441a49cc3SMasahide NAKAMURA } 158541a49cc3SMasahide NAKAMURA 158641a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 158741a49cc3SMasahide NAKAMURA int n, unsigned short family) 158841a49cc3SMasahide NAKAMURA { 158941a49cc3SMasahide NAKAMURA return -ENOSYS; 159041a49cc3SMasahide NAKAMURA } 159141a49cc3SMasahide NAKAMURA #endif 1592af11e316SJamal Hadi Salim 1593af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1594af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1595af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1596af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1597af11e316SJamal Hadi Salim }; 1598af11e316SJamal Hadi Salim 15995a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 16005a6d3416SJamal Hadi Salim u32 incnt; 16015a6d3416SJamal Hadi Salim u32 outcnt; 16025a6d3416SJamal Hadi Salim u32 fwdcnt; 16035a6d3416SJamal Hadi Salim u32 inscnt; 16045a6d3416SJamal Hadi Salim u32 outscnt; 16055a6d3416SJamal Hadi Salim u32 fwdscnt; 16065a6d3416SJamal Hadi Salim u32 spdhcnt; 16075a6d3416SJamal Hadi Salim u32 spdhmcnt; 16085a6d3416SJamal Hadi Salim }; 16095a6d3416SJamal Hadi Salim 1610d511337aSJoe Perches struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 1611d511337aSJoe Perches int xfrm_state_delete(struct xfrm_state *x); 16122e71029eSTetsuo Handa int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); 1613d77e38e6SSteffen Klassert int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); 1614d511337aSJoe Perches void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1615d511337aSJoe Perches void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1616d511337aSJoe Perches u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 1617d511337aSJoe Perches int xfrm_init_replay(struct xfrm_state *x); 1618d511337aSJoe Perches int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1619ffdb5211SIlan Tayari int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload); 1620d511337aSJoe Perches int xfrm_init_state(struct xfrm_state *x); 1621d511337aSJoe Perches int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1622d511337aSJoe Perches int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); 1623d511337aSJoe Perches int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1624acf568eeSHerbert Xu int xfrm_trans_queue(struct sk_buff *skb, 1625acf568eeSHerbert Xu int (*finish)(struct net *, struct sock *, 1626acf568eeSHerbert Xu struct sk_buff *)); 1627d511337aSJoe Perches int xfrm_output_resume(struct sk_buff *skb, int err); 16287026b1ddSDavid Miller int xfrm_output(struct sock *sk, struct sk_buff *skb); 1629d511337aSJoe Perches int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1630d511337aSJoe Perches void xfrm_local_error(struct sk_buff *skb, int mtu); 1631d511337aSJoe Perches int xfrm4_extract_header(struct sk_buff *skb); 1632d511337aSJoe Perches int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1633d511337aSJoe Perches int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1634716062fdSHerbert Xu int encap_type); 1635d511337aSJoe Perches int xfrm4_transport_finish(struct sk_buff *skb, int async); 1636d511337aSJoe Perches int xfrm4_rcv(struct sk_buff *skb); 16371e295370SSteffen Klassert int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 1638c4541b41SHerbert Xu 1639c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1640c4541b41SHerbert Xu { 164170be6c91SSteffen Klassert XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; 16423328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->family = AF_INET; 16433328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); 16443328715eSSteffen Klassert return xfrm_input(skb, nexthdr, spi, 0); 1645c4541b41SHerbert Xu } 1646c4541b41SHerbert Xu 1647d511337aSJoe Perches int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1648d511337aSJoe Perches int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1649ede2059dSEric W. Biederman int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); 16507026b1ddSDavid Miller int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); 16513328715eSSteffen Klassert int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 16523328715eSSteffen Klassert int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); 16533328715eSSteffen Klassert int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); 1654d511337aSJoe Perches int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1655d511337aSJoe Perches int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1656d511337aSJoe Perches void xfrm4_local_error(struct sk_buff *skb, u32 mtu); 1657d511337aSJoe Perches int xfrm6_extract_header(struct sk_buff *skb); 1658d511337aSJoe Perches int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 165963c43787SNicolas Dichtel int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, 166063c43787SNicolas Dichtel struct ip6_tnl *t); 1661d511337aSJoe Perches int xfrm6_transport_finish(struct sk_buff *skb, int async); 166263c43787SNicolas Dichtel int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); 1663d511337aSJoe Perches int xfrm6_rcv(struct sk_buff *skb); 1664d511337aSJoe Perches int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1665fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 16667b77d161SDavid S. Miller void xfrm6_local_error(struct sk_buff *skb, u32 mtu); 16677e14ea15SSteffen Klassert int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 16687e14ea15SSteffen Klassert int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); 16697e14ea15SSteffen Klassert int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); 1670d511337aSJoe Perches int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 16717b77d161SDavid S. Miller int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1672d511337aSJoe Perches __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1673d511337aSJoe Perches __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 1674d511337aSJoe Perches int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1675d511337aSJoe Perches int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1676ede2059dSEric W. Biederman int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); 16777026b1ddSDavid Miller int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); 1678d511337aSJoe Perches int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1679aee5adb4SMasahide NAKAMURA u8 **prevhdr); 16801da177e4SLinus Torvalds 16811da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1682d511337aSJoe Perches int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 1683d511337aSJoe Perches int xfrm_user_policy(struct sock *sk, int optname, 1684d511337aSJoe Perches u8 __user *optval, int optlen); 16851da177e4SLinus Torvalds #else 16861da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 16871da177e4SLinus Torvalds { 16881da177e4SLinus Torvalds return -ENOPROTOOPT; 16891da177e4SLinus Torvalds } 16901da177e4SLinus Torvalds 1691067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 16921da177e4SLinus Torvalds { 16931da177e4SLinus Torvalds /* should not happen */ 16941da177e4SLinus Torvalds kfree_skb(skb); 16951da177e4SLinus Torvalds return 0; 16961da177e4SLinus Torvalds } 16971da177e4SLinus Torvalds #endif 16981da177e4SLinus Torvalds 1699d77e38e6SSteffen Klassert struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, 1700d77e38e6SSteffen Klassert const xfrm_address_t *saddr, 1701d77e38e6SSteffen Klassert const xfrm_address_t *daddr, 1702077fbac4SLorenzo Colitti int family, u32 mark); 1703d77e38e6SSteffen Klassert 17040331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 17054c563f76STimo Teras 1706d511337aSJoe Perches void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1707d511337aSJoe Perches int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 1708d511337aSJoe Perches int (*func)(struct xfrm_policy *, int, int, void*), 1709d511337aSJoe Perches void *); 1710283bc9f3SFan Du void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); 17111da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 17127e652640SSteffen Klassert struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id, 17138ca2e93bSJamal Hadi Salim u8 type, int dir, 17144e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1715ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1716ef41aaa0SEric Paris int *err); 17177e652640SSteffen Klassert struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8, 17187e652640SSteffen Klassert int dir, u32 id, int delete, int *err); 17192e71029eSTetsuo Handa int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); 1720880a6fabSChristophe Gouault void xfrm_policy_hash_rebuild(struct net *net); 17211da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1722776e9dd9SFan Du int verify_spi_info(u8 proto, u32 min, u32 max); 1723d511337aSJoe Perches int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1724e473fcb4SMathias Krause struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, 17257e652640SSteffen Klassert u8 mode, u32 reqid, u32 if_id, u8 proto, 1726a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1727a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1728bd55775cSJamal Hadi Salim unsigned short family); 1729d511337aSJoe Perches int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 17301da177e4SLinus Torvalds 173180c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1732d511337aSJoe Perches int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1733183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 17348bafd730SAntony Antony const struct xfrm_kmaddress *k, 17358bafd730SAntony Antony const struct xfrm_encap_tmpl *encap); 1736283bc9f3SFan Du struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); 1737d511337aSJoe Perches struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, 17384ab47d47SAntony Antony struct xfrm_migrate *m, 17394ab47d47SAntony Antony struct xfrm_encap_tmpl *encap); 1740d511337aSJoe Perches int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 174113c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 17424ab47d47SAntony Antony struct xfrm_kmaddress *k, struct net *net, 17434ab47d47SAntony Antony struct xfrm_encap_tmpl *encap); 174480c9abaaSShinta Sugimoto #endif 174580c9abaaSShinta Sugimoto 1746d511337aSJoe Perches int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 1747d511337aSJoe Perches void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); 1748d511337aSJoe Perches int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, 1749d511337aSJoe Perches xfrm_address_t *addr); 17501da177e4SLinus Torvalds 1751d511337aSJoe Perches void xfrm_input_init(void); 1752d511337aSJoe Perches int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 17531da177e4SLinus Torvalds 1754d511337aSJoe Perches void xfrm_probe_algs(void); 1755d511337aSJoe Perches int xfrm_count_pfkey_auth_supported(void); 1756d511337aSJoe Perches int xfrm_count_pfkey_enc_supported(void); 1757d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 1758d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 1759d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 1760d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 1761d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 1762d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 1763d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 1764d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 1765d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 17661a6509d9SHerbert Xu int probe); 17671da177e4SLinus Torvalds 1768ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm6_addr_equal(const xfrm_address_t *a, 1769ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b) 1770ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 { 1771ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_equal((const struct in6_addr *)a, 1772ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (const struct in6_addr *)b); 1773ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 } 1774ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 177570e94e66SYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm_addr_equal(const xfrm_address_t *a, 177670e94e66SYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b, 177770e94e66SYOSHIFUJI Hideaki / 吉藤英明 sa_family_t family) 177870e94e66SYOSHIFUJI Hideaki / 吉藤英明 { 177970e94e66SYOSHIFUJI Hideaki / 吉藤英明 switch (family) { 178070e94e66SYOSHIFUJI Hideaki / 吉藤英明 default: 178170e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET: 178270e94e66SYOSHIFUJI Hideaki / 吉藤英明 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; 178370e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET6: 178470e94e66SYOSHIFUJI Hideaki / 吉藤英明 return xfrm6_addr_equal(a, b); 178570e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 178670e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 178770e94e66SYOSHIFUJI Hideaki / 吉藤英明 178877d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 178977d8d7a6SHerbert Xu { 179077d8d7a6SHerbert Xu return index & 7; 179177d8d7a6SHerbert Xu } 179277d8d7a6SHerbert Xu 1793a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1794a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1795f8cd5488SJamal Hadi Salim { 1796be33690dSPatrick McHardy struct sock *nlsk; 1797be33690dSPatrick McHardy int ret = 0; 1798be33690dSPatrick McHardy 1799be33690dSPatrick McHardy rcu_read_lock(); 1800a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1801be33690dSPatrick McHardy if (nlsk) 1802be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1803be33690dSPatrick McHardy rcu_read_unlock(); 1804be33690dSPatrick McHardy return ret; 1805f8cd5488SJamal Hadi Salim } 18060f24558eSHoria Geanta 18070f24558eSHoria Geanta static inline int xfrm_acquire_is_on(struct net *net) 18080f24558eSHoria Geanta { 18090f24558eSHoria Geanta struct sock *nlsk; 18100f24558eSHoria Geanta int ret = 0; 18110f24558eSHoria Geanta 18120f24558eSHoria Geanta rcu_read_lock(); 18130f24558eSHoria Geanta nlsk = rcu_dereference(net->xfrm.nlsk); 18140f24558eSHoria Geanta if (nlsk) 18150f24558eSHoria Geanta ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); 18160f24558eSHoria Geanta rcu_read_unlock(); 18170f24558eSHoria Geanta 18180f24558eSHoria Geanta return ret; 18190f24558eSHoria Geanta } 1820a6483b79SAlexey Dobriyan #endif 1821f8cd5488SJamal Hadi Salim 1822373b8eebSAlexey Dobriyan static inline unsigned int aead_len(struct xfrm_algo_aead *alg) 1823ee5c2317SSteffen Klassert { 1824ee5c2317SSteffen Klassert return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 1825ee5c2317SSteffen Klassert } 1826ee5c2317SSteffen Klassert 182706cd22f8SAlexey Dobriyan static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) 18280f99be0dSEric Dumazet { 18290f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 18300f99be0dSEric Dumazet } 18310f99be0dSEric Dumazet 18321bd963a7SAlexey Dobriyan static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 18334447bb33SMartin Willi { 18344447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 18354447bb33SMartin Willi } 18364447bb33SMartin Willi 18375e708e47SAlexey Dobriyan static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 18389736acf3SSteffen Klassert { 18399736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 18409736acf3SSteffen Klassert } 18419736acf3SSteffen Klassert 184280c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1843af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1844af2f464eSSteffen Klassert struct xfrm_state *orig) 1845af2f464eSSteffen Klassert { 1846af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1847af2f464eSSteffen Klassert GFP_KERNEL); 1848af2f464eSSteffen Klassert if (!x->replay_esn) 1849af2f464eSSteffen Klassert return -ENOMEM; 1850af2f464eSSteffen Klassert 1851af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1852af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1853af2f464eSSteffen Klassert 1854af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1855af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1856af2f464eSSteffen Klassert GFP_KERNEL); 1857af2f464eSSteffen Klassert if (!x->preplay_esn) { 1858af2f464eSSteffen Klassert kfree(x->replay_esn); 1859af2f464eSSteffen Klassert return -ENOMEM; 1860af2f464eSSteffen Klassert } 1861af2f464eSSteffen Klassert 1862af2f464eSSteffen Klassert return 0; 1863af2f464eSSteffen Klassert } 1864af2f464eSSteffen Klassert 1865ee5c2317SSteffen Klassert static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) 1866ee5c2317SSteffen Klassert { 1867ee5c2317SSteffen Klassert return kmemdup(orig, aead_len(orig), GFP_KERNEL); 1868ee5c2317SSteffen Klassert } 1869ee5c2317SSteffen Klassert 1870ee5c2317SSteffen Klassert 187180c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 187280c9abaaSShinta Sugimoto { 18730f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 187480c9abaaSShinta Sugimoto } 187580c9abaaSShinta Sugimoto 18764447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 18774447bb33SMartin Willi { 18784447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 18794447bb33SMartin Willi } 18804447bb33SMartin Willi 188180c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 188280c9abaaSShinta Sugimoto { 188380c9abaaSShinta Sugimoto int i; 188480c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 188580c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 188680c9abaaSShinta Sugimoto } 188780c9abaaSShinta Sugimoto 188880c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 188980c9abaaSShinta Sugimoto { 189080c9abaaSShinta Sugimoto int i; 189180c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 189280c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 189380c9abaaSShinta Sugimoto } 189480c9abaaSShinta Sugimoto #endif 1895f8cd5488SJamal Hadi Salim 1896def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 189700501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 189800501121SHerbert Xu { 18992294be0fSFlorian Westphal struct sec_path *sp = skb_sec_path(skb); 19002294be0fSFlorian Westphal 19012294be0fSFlorian Westphal return sp->xvec[sp->len - 1]; 190200501121SHerbert Xu } 1903f53c7239SSteffen Klassert #endif 1904f53c7239SSteffen Klassert 190554ef207aSSteffen Klassert static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) 190654ef207aSSteffen Klassert { 1907f53c7239SSteffen Klassert #ifdef CONFIG_XFRM 19082294be0fSFlorian Westphal struct sec_path *sp = skb_sec_path(skb); 190954ef207aSSteffen Klassert 191054ef207aSSteffen Klassert if (!sp || !sp->olen || sp->len != sp->olen) 191154ef207aSSteffen Klassert return NULL; 191254ef207aSSteffen Klassert 191354ef207aSSteffen Klassert return &sp->ovec[sp->olen - 1]; 1914f53c7239SSteffen Klassert #else 1915f53c7239SSteffen Klassert return NULL; 1916def8b4faSAlexey Dobriyan #endif 1917f53c7239SSteffen Klassert } 191800501121SHerbert Xu 1919e9a441b6SKirill Tkhai void __init xfrm_dev_init(void); 1920b81f884aSHangbin Liu 1921b81f884aSHangbin Liu #ifdef CONFIG_XFRM_OFFLOAD 1922f53c7239SSteffen Klassert void xfrm_dev_resume(struct sk_buff *skb); 1923f53c7239SSteffen Klassert void xfrm_dev_backlog(struct softnet_data *sd); 1924f53c7239SSteffen Klassert struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again); 1925d77e38e6SSteffen Klassert int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, 1926d77e38e6SSteffen Klassert struct xfrm_user_offload *xuo); 1927d77e38e6SSteffen Klassert bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); 1928d77e38e6SSteffen Klassert 192950bd870aSYossef Efraim static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) 193050bd870aSYossef Efraim { 193150bd870aSYossef Efraim struct xfrm_state_offload *xso = &x->xso; 193250bd870aSYossef Efraim 193350bd870aSYossef Efraim if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn) 193450bd870aSYossef Efraim xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x); 193550bd870aSYossef Efraim } 193650bd870aSYossef Efraim 1937f70f250aSSteffen Klassert static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) 1938f70f250aSSteffen Klassert { 1939f70f250aSSteffen Klassert struct xfrm_state *x = dst->xfrm; 1940b6ca8bd5SDavid Miller struct xfrm_dst *xdst; 1941f70f250aSSteffen Klassert 1942f70f250aSSteffen Klassert if (!x || !x->type_offload) 1943f70f250aSSteffen Klassert return false; 1944f70f250aSSteffen Klassert 1945b6ca8bd5SDavid Miller xdst = (struct xfrm_dst *) dst; 19462271d519SSteffen Klassert if (!x->xso.offload_handle && !xdst->child->xfrm) 19472271d519SSteffen Klassert return true; 19480f6c480fSDavid Miller if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && 1949b6ca8bd5SDavid Miller !xdst->child->xfrm) 1950f70f250aSSteffen Klassert return true; 1951f70f250aSSteffen Klassert 1952f70f250aSSteffen Klassert return false; 1953f70f250aSSteffen Klassert } 1954f70f250aSSteffen Klassert 1955d77e38e6SSteffen Klassert static inline void xfrm_dev_state_delete(struct xfrm_state *x) 1956d77e38e6SSteffen Klassert { 1957d77e38e6SSteffen Klassert struct xfrm_state_offload *xso = &x->xso; 1958d77e38e6SSteffen Klassert 1959d77e38e6SSteffen Klassert if (xso->dev) 1960d77e38e6SSteffen Klassert xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); 1961d77e38e6SSteffen Klassert } 1962d77e38e6SSteffen Klassert 1963d77e38e6SSteffen Klassert static inline void xfrm_dev_state_free(struct xfrm_state *x) 1964d77e38e6SSteffen Klassert { 1965d77e38e6SSteffen Klassert struct xfrm_state_offload *xso = &x->xso; 1966d77e38e6SSteffen Klassert struct net_device *dev = xso->dev; 1967d77e38e6SSteffen Klassert 1968d77e38e6SSteffen Klassert if (dev && dev->xfrmdev_ops) { 19697f05b467SShannon Nelson if (dev->xfrmdev_ops->xdo_dev_state_free) 1970d77e38e6SSteffen Klassert dev->xfrmdev_ops->xdo_dev_state_free(x); 1971d77e38e6SSteffen Klassert xso->dev = NULL; 1972d77e38e6SSteffen Klassert dev_put(dev); 1973d77e38e6SSteffen Klassert } 1974d77e38e6SSteffen Klassert } 1975d77e38e6SSteffen Klassert #else 1976f53c7239SSteffen Klassert static inline void xfrm_dev_resume(struct sk_buff *skb) 1977f53c7239SSteffen Klassert { 1978f53c7239SSteffen Klassert } 1979f53c7239SSteffen Klassert 1980f53c7239SSteffen Klassert static inline void xfrm_dev_backlog(struct softnet_data *sd) 1981f53c7239SSteffen Klassert { 1982f53c7239SSteffen Klassert } 1983f53c7239SSteffen Klassert 1984f53c7239SSteffen Klassert static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again) 1985f6e27114SSteffen Klassert { 19863dca3f38SSteffen Klassert return skb; 1987f6e27114SSteffen Klassert } 1988f6e27114SSteffen Klassert 1989d77e38e6SSteffen Klassert static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo) 1990d77e38e6SSteffen Klassert { 1991d77e38e6SSteffen Klassert return 0; 1992d77e38e6SSteffen Klassert } 1993d77e38e6SSteffen Klassert 1994d77e38e6SSteffen Klassert static inline void xfrm_dev_state_delete(struct xfrm_state *x) 1995d77e38e6SSteffen Klassert { 1996d77e38e6SSteffen Klassert } 1997d77e38e6SSteffen Klassert 1998d77e38e6SSteffen Klassert static inline void xfrm_dev_state_free(struct xfrm_state *x) 1999d77e38e6SSteffen Klassert { 2000d77e38e6SSteffen Klassert } 2001d77e38e6SSteffen Klassert 2002d77e38e6SSteffen Klassert static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) 2003d77e38e6SSteffen Klassert { 2004d77e38e6SSteffen Klassert return false; 2005d77e38e6SSteffen Klassert } 2006f70f250aSSteffen Klassert 200750bd870aSYossef Efraim static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x) 200850bd870aSYossef Efraim { 200950bd870aSYossef Efraim } 201050bd870aSYossef Efraim 2011f70f250aSSteffen Klassert static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) 2012f70f250aSSteffen Klassert { 2013f70f250aSSteffen Klassert return false; 2014f70f250aSSteffen Klassert } 2015d77e38e6SSteffen Klassert #endif 2016d77e38e6SSteffen Klassert 2017bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 2018bf825f81SJamal Hadi Salim { 2019bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 20204efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 2021bf825f81SJamal Hadi Salim else 2022bf825f81SJamal Hadi Salim m->v = m->m = 0; 2023bf825f81SJamal Hadi Salim 2024bf825f81SJamal Hadi Salim return m->v & m->m; 2025bf825f81SJamal Hadi Salim } 2026bf825f81SJamal Hadi Salim 2027e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 2028bf825f81SJamal Hadi Salim { 20291d1e34ddSDavid S. Miller int ret = 0; 2030bf825f81SJamal Hadi Salim 20311d1e34ddSDavid S. Miller if (m->m | m->v) 20321d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 20331d1e34ddSDavid S. Miller return ret; 2034bf825f81SJamal Hadi Salim } 2035bf825f81SJamal Hadi Salim 20369b42c1f1SSteffen Klassert static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x) 20379b42c1f1SSteffen Klassert { 20389b42c1f1SSteffen Klassert struct xfrm_mark *m = &x->props.smark; 20399b42c1f1SSteffen Klassert 20409b42c1f1SSteffen Klassert return (m->v & m->m) | (mark & ~m->m); 20419b42c1f1SSteffen Klassert } 20429b42c1f1SSteffen Klassert 20437e652640SSteffen Klassert static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id) 20447e652640SSteffen Klassert { 20457e652640SSteffen Klassert int ret = 0; 20467e652640SSteffen Klassert 20477e652640SSteffen Klassert if (if_id) 20487e652640SSteffen Klassert ret = nla_put_u32(skb, XFRMA_IF_ID, if_id); 20497e652640SSteffen Klassert return ret; 20507e652640SSteffen Klassert } 20517e652640SSteffen Klassert 205270be6c91SSteffen Klassert static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, 205370be6c91SSteffen Klassert unsigned int family) 205470be6c91SSteffen Klassert { 205570be6c91SSteffen Klassert bool tunnel = false; 205670be6c91SSteffen Klassert 205770be6c91SSteffen Klassert switch(family) { 205870be6c91SSteffen Klassert case AF_INET: 205970be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) 206070be6c91SSteffen Klassert tunnel = true; 206170be6c91SSteffen Klassert break; 206270be6c91SSteffen Klassert case AF_INET6: 206370be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) 206470be6c91SSteffen Klassert tunnel = true; 206570be6c91SSteffen Klassert break; 206670be6c91SSteffen Klassert } 206770be6c91SSteffen Klassert if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) 206870be6c91SSteffen Klassert return -EINVAL; 206970be6c91SSteffen Klassert 207070be6c91SSteffen Klassert return 0; 207170be6c91SSteffen Klassert } 20721da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 2073