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> 269e0d57fdSYury Polyanskiy 279e0d57fdSYury Polyanskiy #include <linux/interrupt.h> 289e0d57fdSYury Polyanskiy 29558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 30558f82efSMasahide NAKAMURA #include <net/snmp.h> 31558f82efSMasahide NAKAMURA #endif 321da177e4SLinus Torvalds 33d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 34d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 35d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 36d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 37d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 38d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 39d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 40d3d6dd3aSMasahide NAKAMURA 41fa9921e4SNicolas Dichtel #define XFRM_ALIGN4(len) (((len) + 3) & ~3) 421da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 43b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 44b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 45d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 46d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 47ffdb5211SIlan Tayari #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ 48ffdb5211SIlan Tayari MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) 491da177e4SLinus Torvalds 50558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 5159c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) 52558f82efSMasahide NAKAMURA #else 5359c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) ((void)(net)) 54558f82efSMasahide NAKAMURA #endif 55558f82efSMasahide NAKAMURA 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 581da177e4SLinus Torvalds ------------------------------------ 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds Basic objects: 611da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 621da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 631da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 641da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 671da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 681da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 691da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 741da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 751da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 761da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 771da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 781da177e4SLinus Torvalds to a dst_entry returned to requestor. 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 811da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 821da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 831da177e4SLinus Torvalds |---. child .-> NULL 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds Resolution of xrfm_tmpl 891da177e4SLinus Torvalds ----------------------- 901da177e4SLinus Torvalds Template contains: 911da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 921da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 931da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 941da177e4SLinus Torvalds Q: allow to resolve security gateway? 951da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 961da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 971da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 981da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 991da177e4SLinus Torvalds 7. ->share Sharing mode. 1001da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1011da177e4SLinus Torvalds flow id? 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1041da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1051da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds PROBLEMS: 1081da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1091da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1101da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1111da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1121da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1131da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1141da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1151da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds 11812a169e7SHerbert Xu struct xfrm_state_walk { 11912a169e7SHerbert Xu struct list_head all; 12012a169e7SHerbert Xu u8 state; 12112a169e7SHerbert Xu u8 dying; 12212a169e7SHerbert Xu u8 proto; 12312a169e7SHerbert Xu u32 seq; 124870a2df4SNicolas Dichtel struct xfrm_address_filter *filter; 12512a169e7SHerbert Xu }; 12612a169e7SHerbert Xu 127d77e38e6SSteffen Klassert struct xfrm_state_offload { 128d77e38e6SSteffen Klassert struct net_device *dev; 129d77e38e6SSteffen Klassert unsigned long offload_handle; 130d77e38e6SSteffen Klassert unsigned int num_exthdrs; 131d77e38e6SSteffen Klassert u8 flags; 132d77e38e6SSteffen Klassert }; 133d77e38e6SSteffen Klassert 1341da177e4SLinus Torvalds /* Full description of state of transformer. */ 135fd2c3ef7SEric Dumazet struct xfrm_state { 1360c5c9fb5SEric W. Biederman possible_net_t xs_net; 137abb81c4fSHerbert Xu union { 13812a169e7SHerbert Xu struct hlist_node gclist; 1398f126e37SDavid S. Miller struct hlist_node bydst; 140abb81c4fSHerbert Xu }; 1418f126e37SDavid S. Miller struct hlist_node bysrc; 1428f126e37SDavid S. Miller struct hlist_node byspi; 1431da177e4SLinus Torvalds 14488755e9cSReshetova, Elena refcount_t refcnt; 1451da177e4SLinus Torvalds spinlock_t lock; 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds struct xfrm_id id; 1481da177e4SLinus Torvalds struct xfrm_selector sel; 149bf825f81SJamal Hadi Salim struct xfrm_mark mark; 15035d2856bSMartin Willi u32 tfcpad; 1511da177e4SLinus Torvalds 1529d4a706dSDavid S. Miller u32 genid; 1539d4a706dSDavid S. Miller 15412a169e7SHerbert Xu /* Key manager bits */ 15512a169e7SHerbert Xu struct xfrm_state_walk km; 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds /* Parameters of this state. */ 1581da177e4SLinus Torvalds struct { 1591da177e4SLinus Torvalds u32 reqid; 1601da177e4SLinus Torvalds u8 mode; 1611da177e4SLinus Torvalds u8 replay_window; 1621da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1631da177e4SLinus Torvalds u8 flags; 1641da177e4SLinus Torvalds u16 family; 1651da177e4SLinus Torvalds xfrm_address_t saddr; 1661da177e4SLinus Torvalds int header_len; 1671da177e4SLinus Torvalds int trailer_len; 168a947b0a9SNicolas Dichtel u32 extra_flags; 169077fbac4SLorenzo Colitti u32 output_mark; 1701da177e4SLinus Torvalds } props; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* Data for transformer */ 1754447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1761da177e4SLinus Torvalds struct xfrm_algo *ealg; 1771da177e4SLinus Torvalds struct xfrm_algo *calg; 1781a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 17969b0137fSHerbert Xu const char *geniv; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds /* Data for encapsulator */ 1821da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1831da177e4SLinus Torvalds 184060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 185060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 186060f02a3SNoriaki TAKAMIYA 1871da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1881da177e4SLinus Torvalds struct xfrm_state *tunnel; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1911da177e4SLinus Torvalds atomic_t tunnel_users; 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds /* State for replay detection */ 1941da177e4SLinus Torvalds struct xfrm_replay_state replay; 1959736acf3SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 1961da177e4SLinus Torvalds 197f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 198f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 1999736acf3SSteffen Klassert struct xfrm_replay_state_esn *preplay_esn; 200f8cd5488SJamal Hadi Salim 2019fdc4883SSteffen Klassert /* The functions for replay detection. */ 202e45a8a9eSJulia Lawall const struct xfrm_replay *repl; 2039fdc4883SSteffen Klassert 2042717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 2052717096aSJamal Hadi Salim * moment 2062717096aSJamal Hadi Salim */ 2072717096aSJamal Hadi Salim u32 xflags; 2082717096aSJamal Hadi Salim 209f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 210f8cd5488SJamal Hadi Salim u32 replay_maxage; 211f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 212f8cd5488SJamal Hadi Salim 213f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 214f8cd5488SJamal Hadi Salim struct timer_list rtimer; 215f8cd5488SJamal Hadi Salim 2161da177e4SLinus Torvalds /* Statistics */ 2171da177e4SLinus Torvalds struct xfrm_stats stats; 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2209e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2211da177e4SLinus Torvalds 222d77e38e6SSteffen Klassert struct xfrm_state_offload xso; 223d77e38e6SSteffen Klassert 224e3c0d047SFan Du /* used to fix curlft->add_time when changing date */ 225e3c0d047SFan Du long saved_tmo; 226e3c0d047SFan Du 2279afaca05SMasahide NAKAMURA /* Last used time */ 228d26f3984SHerbert Xu unsigned long lastused; 2299afaca05SMasahide NAKAMURA 230cac2661cSSteffen Klassert struct page_frag xfrag; 231cac2661cSSteffen Klassert 2321da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2331da177e4SLinus Torvalds * transformer. */ 234533cb5b0SEric Dumazet const struct xfrm_type *type; 23513996378SHerbert Xu struct xfrm_mode *inner_mode; 236df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 23713996378SHerbert Xu struct xfrm_mode *outer_mode; 2381da177e4SLinus Torvalds 2399d389d7fSSteffen Klassert const struct xfrm_type_offload *type_offload; 2409d389d7fSSteffen Klassert 241df71837dSTrent Jaeger /* Security context */ 242df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 243df71837dSTrent Jaeger 2441da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2451da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2461da177e4SLinus Torvalds void *data; 2471da177e4SLinus Torvalds }; 2481da177e4SLinus Torvalds 249673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 250673c09beSAlexey Dobriyan { 251673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 252673c09beSAlexey Dobriyan } 253673c09beSAlexey Dobriyan 2542717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2552717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 256e3c0d047SFan Du #define XFRM_SOFT_EXPIRE 2 2572717096aSJamal Hadi Salim 2581da177e4SLinus Torvalds enum { 2591da177e4SLinus Torvalds XFRM_STATE_VOID, 2601da177e4SLinus Torvalds XFRM_STATE_ACQ, 2611da177e4SLinus Torvalds XFRM_STATE_VALID, 2621da177e4SLinus Torvalds XFRM_STATE_ERROR, 2631da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2641da177e4SLinus Torvalds XFRM_STATE_DEAD 2651da177e4SLinus Torvalds }; 2661da177e4SLinus Torvalds 26726b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 268fd2c3ef7SEric Dumazet struct km_event { 269bf08867fSHerbert Xu union { 270bf08867fSHerbert Xu u32 hard; 271bf08867fSHerbert Xu u32 proto; 272bf08867fSHerbert Xu u32 byid; 273f8cd5488SJamal Hadi Salim u32 aevent; 274f7b6983fSMasahide NAKAMURA u32 type; 275bf08867fSHerbert Xu } data; 276bf08867fSHerbert Xu 27726b15dadSJamal Hadi Salim u32 seq; 27815e47304SEric W. Biederman u32 portid; 27926b15dadSJamal Hadi Salim u32 event; 2807067802eSAlexey Dobriyan struct net *net; 28126b15dadSJamal Hadi Salim }; 28226b15dadSJamal Hadi Salim 2839fdc4883SSteffen Klassert struct xfrm_replay { 2849fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2859fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2869fdc4883SSteffen Klassert struct sk_buff *skb, 2879fdc4883SSteffen Klassert __be32 net_seq); 2883b59df46SSteffen Klassert int (*recheck)(struct xfrm_state *x, 2893b59df46SSteffen Klassert struct sk_buff *skb, 2903b59df46SSteffen Klassert __be32 net_seq); 2919fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2929fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2939fdc4883SSteffen Klassert }; 2949fdc4883SSteffen Klassert 29525ee3286SHerbert Xu struct net_device; 2961da177e4SLinus Torvalds struct xfrm_type; 2971da177e4SLinus Torvalds struct xfrm_dst; 2981da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2991da177e4SLinus Torvalds struct dst_ops *dst_ops; 30042a7b32bSDavid Ahern struct dst_entry *(*dst_lookup)(struct net *net, 30142a7b32bSDavid Ahern int tos, int oif, 3025e6b930fSDavid S. Miller const xfrm_address_t *saddr, 303077fbac4SLorenzo Colitti const xfrm_address_t *daddr, 304077fbac4SLorenzo Colitti u32 mark); 30542a7b32bSDavid Ahern int (*get_saddr)(struct net *net, int oif, 30642a7b32bSDavid Ahern xfrm_address_t *saddr, 307077fbac4SLorenzo Colitti xfrm_address_t *daddr, 308077fbac4SLorenzo Colitti u32 mark); 3091da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 310d5422efeSHerbert Xu struct flowi *fl, 311d5422efeSHerbert Xu int reverse); 31205d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 313a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 314a1b05140SMasahide NAKAMURA struct dst_entry *dst, 315a1b05140SMasahide NAKAMURA int nfheader_len); 31625ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 31787c1e12bSHerbert Xu struct net_device *dev, 3180c7b3eefSDavid S. Miller const struct flowi *fl); 3192774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 3201da177e4SLinus Torvalds }; 3211da177e4SLinus Torvalds 322a2817d8bSFlorian Westphal int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); 323a2817d8bSFlorian Westphal void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); 324d511337aSJoe Perches void km_policy_notify(struct xfrm_policy *xp, int dir, 325d511337aSJoe Perches const struct km_event *c); 326ec30d78cSFlorian Westphal void xfrm_policy_cache_flush(void); 327d511337aSJoe Perches void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds struct xfrm_tmpl; 330d511337aSJoe Perches int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, 331d511337aSJoe Perches struct xfrm_policy *pol); 332d511337aSJoe Perches void km_state_expired(struct xfrm_state *x, int hard, u32 portid); 333d511337aSJoe Perches int __xfrm_state_delete(struct xfrm_state *x); 33453bc6b4dSJamal Hadi Salim 3351da177e4SLinus Torvalds struct xfrm_state_afinfo { 33617c2a42aSHerbert Xu unsigned int family; 33736cf9acfSHerbert Xu unsigned int proto; 3388e3d716cSAl Viro __be16 eth_proto; 33917c2a42aSHerbert Xu struct module *owner; 340533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 3419d389d7fSSteffen Klassert const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX]; 342aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 3439d389d7fSSteffen Klassert 344d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 34573e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 34673e5ebb2SDavid S. Miller const struct flowi *fl); 34719bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 34819bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 34919bd6244SDavid S. Miller const xfrm_address_t *daddr, 35019bd6244SDavid S. Miller const xfrm_address_t *saddr); 35141a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 35241a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 353ede2059dSEric W. Biederman int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); 3547026b1ddSDavid Miller int (*output_finish)(struct sock *sk, struct sk_buff *skb); 355227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 356227620e2SHerbert Xu struct sk_buff *skb); 35736cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 35836cf9acfSHerbert Xu struct sk_buff *skb); 359716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 360716062fdSHerbert Xu int async); 361628e341fSHannes Frederic Sowa void (*local_error)(struct sk_buff *skb, u32 mtu); 3621da177e4SLinus Torvalds }; 3631da177e4SLinus Torvalds 364d511337aSJoe Perches int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 365d511337aSJoe Perches int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 366d511337aSJoe Perches struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); 367711059b9SFlorian Westphal struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); 3681da177e4SLinus Torvalds 3692f32b51bSSteffen Klassert struct xfrm_input_afinfo { 3702f32b51bSSteffen Klassert unsigned int family; 3712f32b51bSSteffen Klassert int (*callback)(struct sk_buff *skb, u8 protocol, 3722f32b51bSSteffen Klassert int err); 3732f32b51bSSteffen Klassert }; 3742f32b51bSSteffen Klassert 375960fdfdeSFlorian Westphal int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); 376960fdfdeSFlorian Westphal int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); 3772f32b51bSSteffen Klassert 378d511337aSJoe Perches void xfrm_state_delete_tunnel(struct xfrm_state *x); 3791da177e4SLinus Torvalds 380fd2c3ef7SEric Dumazet struct xfrm_type { 3811da177e4SLinus Torvalds char *description; 3821da177e4SLinus Torvalds struct module *owner; 383a6337463Sjamal u8 proto; 384a6337463Sjamal u8 flags; 3851b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 386436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 387f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 388f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3891da177e4SLinus Torvalds 39072cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3911da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 392e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3931da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3948f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3958f029de2SDavid S. Miller const struct flowi *); 396aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3971da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 398c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3991da177e4SLinus Torvalds }; 4001da177e4SLinus Torvalds 401d511337aSJoe Perches int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 402d511337aSJoe Perches int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 4031da177e4SLinus Torvalds 4049d389d7fSSteffen Klassert struct xfrm_type_offload { 4059d389d7fSSteffen Klassert char *description; 4069d389d7fSSteffen Klassert struct module *owner; 4079d389d7fSSteffen Klassert u8 proto; 4089d389d7fSSteffen Klassert void (*encap)(struct xfrm_state *, struct sk_buff *pskb); 4099d389d7fSSteffen Klassert int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); 4109d389d7fSSteffen Klassert int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); 4119d389d7fSSteffen Klassert }; 4129d389d7fSSteffen Klassert 4139d389d7fSSteffen Klassert int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); 4149d389d7fSSteffen Klassert int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); 4159d389d7fSSteffen Klassert 416b59f45d0SHerbert Xu struct xfrm_mode { 417227620e2SHerbert Xu /* 418227620e2SHerbert Xu * Remove encapsulation header. 419227620e2SHerbert Xu * 420227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 421227620e2SHerbert Xu * header. 422227620e2SHerbert Xu * 423227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 424227620e2SHerbert Xu * should be and the network header shall be set to where the IP 425227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 426227620e2SHerbert Xu * payload. 427227620e2SHerbert Xu */ 428227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 429227620e2SHerbert Xu 430227620e2SHerbert Xu /* 431227620e2SHerbert Xu * This is the actual input entry point. 432227620e2SHerbert Xu * 433227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 434227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 435227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 436227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 437227620e2SHerbert Xu */ 438b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 43937fedd3aSHerbert Xu 44037fedd3aSHerbert Xu /* 44137fedd3aSHerbert Xu * Add encapsulation header. 44237fedd3aSHerbert Xu * 44337fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 44437fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 44537fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 44637fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 44737fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 44837fedd3aSHerbert Xu * header. The value of the network header will always point 44937fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 45037fedd3aSHerbert Xu */ 45136cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 45236cf9acfSHerbert Xu 45336cf9acfSHerbert Xu /* 45436cf9acfSHerbert Xu * This is the actual output entry point. 45536cf9acfSHerbert Xu * 45636cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 45736cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 45836cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 45936cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 46036cf9acfSHerbert Xu * call output2. 46136cf9acfSHerbert Xu */ 462eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 463b59f45d0SHerbert Xu 464c35fe410SSteffen Klassert /* 465c35fe410SSteffen Klassert * Adjust pointers into the packet and do GSO segmentation. 466c35fe410SSteffen Klassert */ 467c35fe410SSteffen Klassert struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features); 468c35fe410SSteffen Klassert 469c35fe410SSteffen Klassert /* 470c35fe410SSteffen Klassert * Adjust pointers into the packet when IPsec is done at layer2. 471c35fe410SSteffen Klassert */ 472c35fe410SSteffen Klassert void (*xmit)(struct xfrm_state *x, struct sk_buff *skb); 473c35fe410SSteffen Klassert 47417c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 475b59f45d0SHerbert Xu struct module *owner; 476b59f45d0SHerbert Xu unsigned int encap; 4771bfcb10fSHerbert Xu int flags; 4781bfcb10fSHerbert Xu }; 4791bfcb10fSHerbert Xu 4801bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4811bfcb10fSHerbert Xu enum { 4821bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 483b59f45d0SHerbert Xu }; 484b59f45d0SHerbert Xu 485d511337aSJoe Perches int xfrm_register_mode(struct xfrm_mode *mode, int family); 486d511337aSJoe Perches int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 487b59f45d0SHerbert Xu 488df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 489df9dcb45SKazunori MIYAZAWA { 490df9dcb45SKazunori MIYAZAWA switch(family) { 491df9dcb45SKazunori MIYAZAWA case AF_INET: 492df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 493df9dcb45SKazunori MIYAZAWA case AF_INET6: 494df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 495df9dcb45SKazunori MIYAZAWA default: 496df9dcb45SKazunori MIYAZAWA return 0; 497df9dcb45SKazunori MIYAZAWA } 498df9dcb45SKazunori MIYAZAWA } 499df9dcb45SKazunori MIYAZAWA 500df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 501df9dcb45SKazunori MIYAZAWA { 502df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 503df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 504df9dcb45SKazunori MIYAZAWA return x->inner_mode; 505df9dcb45SKazunori MIYAZAWA else 506df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 507df9dcb45SKazunori MIYAZAWA } 508df9dcb45SKazunori MIYAZAWA 509fd2c3ef7SEric Dumazet struct xfrm_tmpl { 5101da177e4SLinus Torvalds /* id in template is interpreted as: 5111da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 5121da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 5131da177e4SLinus Torvalds * daddr must be fixed too. 5141da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 5151da177e4SLinus Torvalds */ 5161da177e4SLinus Torvalds struct xfrm_id id; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 5191da177e4SLinus Torvalds xfrm_address_t saddr; 5201da177e4SLinus Torvalds 52176b3f055SMiika Komu unsigned short encap_family; 52276b3f055SMiika Komu 523a6337463Sjamal u32 reqid; 5241da177e4SLinus Torvalds 5257e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 526a6337463Sjamal u8 mode; 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 529a6337463Sjamal u8 share; 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 532a6337463Sjamal u8 optional; 5331da177e4SLinus Torvalds 534c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 535a6337463Sjamal u8 allalgs; 536c5d18e98SHerbert Xu 5371da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 538a6337463Sjamal u32 aalgos; 539a6337463Sjamal u32 ealgos; 540a6337463Sjamal u32 calgos; 5411da177e4SLinus Torvalds }; 5421da177e4SLinus Torvalds 543622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 54454ef207aSSteffen Klassert #define XFRM_MAX_OFFLOAD_DEPTH 1 5451da177e4SLinus Torvalds 54612a169e7SHerbert Xu struct xfrm_policy_walk_entry { 54712a169e7SHerbert Xu struct list_head all; 54812a169e7SHerbert Xu u8 dead; 54912a169e7SHerbert Xu }; 55012a169e7SHerbert Xu 55112a169e7SHerbert Xu struct xfrm_policy_walk { 55212a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 55312a169e7SHerbert Xu u8 type; 55412a169e7SHerbert Xu u32 seq; 55512a169e7SHerbert Xu }; 55612a169e7SHerbert Xu 557a0073fe1SSteffen Klassert struct xfrm_policy_queue { 558a0073fe1SSteffen Klassert struct sk_buff_head hold_queue; 559a0073fe1SSteffen Klassert struct timer_list hold_timer; 560a0073fe1SSteffen Klassert unsigned long timeout; 561a0073fe1SSteffen Klassert }; 562a0073fe1SSteffen Klassert 563fd2c3ef7SEric Dumazet struct xfrm_policy { 5640c5c9fb5SEric W. Biederman possible_net_t xp_net; 5652518c7c2SDavid S. Miller struct hlist_node bydst; 5662518c7c2SDavid S. Miller struct hlist_node byidx; 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5691da177e4SLinus Torvalds rwlock_t lock; 570850a6212SReshetova, Elena refcount_t refcnt; 5711da177e4SLinus Torvalds struct timer_list timer; 5721da177e4SLinus Torvalds 57380c802f3STimo Teräs atomic_t genid; 5741da177e4SLinus Torvalds u32 priority; 5751da177e4SLinus Torvalds u32 index; 576bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5771da177e4SLinus Torvalds struct xfrm_selector selector; 5781da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5791da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 58012a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 581a0073fe1SSteffen Klassert struct xfrm_policy_queue polq; 58246ca5f5dSArnaldo Carvalho de Melo u8 type; 58346ca5f5dSArnaldo Carvalho de Melo u8 action; 58446ca5f5dSArnaldo Carvalho de Melo u8 flags; 58546ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 58612a169e7SHerbert Xu u16 family; 587df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5881da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 58956f04730SEric Dumazet struct rcu_head rcu; 5901da177e4SLinus Torvalds }; 5911da177e4SLinus Torvalds 59263eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5930331b1f3SAlexey Dobriyan { 5940331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5950331b1f3SAlexey Dobriyan } 5960331b1f3SAlexey Dobriyan 59713c1d189SArnaud Ebalard struct xfrm_kmaddress { 59813c1d189SArnaud Ebalard xfrm_address_t local; 59913c1d189SArnaud Ebalard xfrm_address_t remote; 60013c1d189SArnaud Ebalard u32 reserved; 60113c1d189SArnaud Ebalard u16 family; 60213c1d189SArnaud Ebalard }; 60313c1d189SArnaud Ebalard 60480c9abaaSShinta Sugimoto struct xfrm_migrate { 60580c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 60680c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 60780c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 60880c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 60980c9abaaSShinta Sugimoto u8 proto; 61080c9abaaSShinta Sugimoto u8 mode; 61180c9abaaSShinta Sugimoto u16 reserved; 61280c9abaaSShinta Sugimoto u32 reqid; 61380c9abaaSShinta Sugimoto u16 old_family; 61480c9abaaSShinta Sugimoto u16 new_family; 61580c9abaaSShinta Sugimoto }; 61680c9abaaSShinta Sugimoto 6171da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 618f8cd5488SJamal Hadi Salim /* what happened */ 619f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 620f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 621f8cd5488SJamal Hadi Salim 622f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 623f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 624f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 625f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 626f8cd5488SJamal Hadi Salim /* default seq threshold size */ 627f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 6281da177e4SLinus Torvalds 629fd2c3ef7SEric Dumazet struct xfrm_mgr { 6301da177e4SLinus Torvalds struct list_head list; 631214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 63265e0736bSFan Du int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); 633cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 6345d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 635214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 636db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 637183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 638183cad12SDavid S. Miller u8 dir, u8 type, 639183cad12SDavid S. Miller const struct xfrm_migrate *m, 640183cad12SDavid S. Miller int num_bundles, 6418bafd730SAntony Antony const struct xfrm_kmaddress *k, 6428bafd730SAntony Antony const struct xfrm_encap_tmpl *encap); 6430f24558eSHoria Geanta bool (*is_alive)(const struct km_event *c); 6441da177e4SLinus Torvalds }; 6451da177e4SLinus Torvalds 646d511337aSJoe Perches int xfrm_register_km(struct xfrm_mgr *km); 647d511337aSJoe Perches int xfrm_unregister_km(struct xfrm_mgr *km); 6481da177e4SLinus Torvalds 64970be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb { 65070be6c91SSteffen Klassert union { 65170be6c91SSteffen Klassert struct inet_skb_parm h4; 65270be6c91SSteffen Klassert struct inet6_skb_parm h6; 65370be6c91SSteffen Klassert } header; 65470be6c91SSteffen Klassert 65570be6c91SSteffen Klassert union { 65670be6c91SSteffen Klassert struct ip_tunnel *ip4; 65770be6c91SSteffen Klassert struct ip6_tnl *ip6; 65870be6c91SSteffen Klassert } tunnel; 65970be6c91SSteffen Klassert }; 66070be6c91SSteffen Klassert 66170be6c91SSteffen Klassert #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) 66270be6c91SSteffen Klassert 663436a0a40SHerbert Xu /* 664436a0a40SHerbert Xu * This structure is used for the duration where packets are being 665436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 666436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 667436a0a40SHerbert Xu */ 668436a0a40SHerbert Xu struct xfrm_skb_cb { 66970be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 670436a0a40SHerbert Xu 671436a0a40SHerbert Xu /* Sequence number for replay protection. */ 672b318e0e4SHerbert Xu union { 6731ce3644aSSteffen Klassert struct { 6741ce3644aSSteffen Klassert __u32 low; 6751ce3644aSSteffen Klassert __u32 hi; 6761ce3644aSSteffen Klassert } output; 6771ce3644aSSteffen Klassert struct { 6781ce3644aSSteffen Klassert __be32 low; 6791ce3644aSSteffen Klassert __be32 hi; 6801ce3644aSSteffen Klassert } input; 681b318e0e4SHerbert Xu } seq; 682436a0a40SHerbert Xu }; 683436a0a40SHerbert Xu 684436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 685436a0a40SHerbert Xu 68636cf9acfSHerbert Xu /* 68736cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 68836cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 68936cf9acfSHerbert Xu */ 69036cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 69170be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 69236cf9acfSHerbert Xu 69336cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 69436cf9acfSHerbert Xu __be16 id; 69536cf9acfSHerbert Xu __be16 frag_off; 69636cf9acfSHerbert Xu 697732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 698732c8bd5SHerbert Xu u8 ihl; 699732c8bd5SHerbert Xu 70036cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 70136cf9acfSHerbert Xu u8 tos; 70236cf9acfSHerbert Xu 70336cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 70436cf9acfSHerbert Xu u8 ttl; 70536cf9acfSHerbert Xu 70636cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 70736cf9acfSHerbert Xu u8 protocol; 70836cf9acfSHerbert Xu 709732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 710732c8bd5SHerbert Xu u8 optlen; 711732c8bd5SHerbert Xu 71236cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 71336cf9acfSHerbert Xu u8 flow_lbl[3]; 71436cf9acfSHerbert Xu }; 71536cf9acfSHerbert Xu 71636cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 71736cf9acfSHerbert Xu 718716062fdSHerbert Xu /* 719716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 720716062fdSHerbert Xu * related information. 721716062fdSHerbert Xu */ 722716062fdSHerbert Xu struct xfrm_spi_skb_cb { 72370be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 724716062fdSHerbert Xu 725716062fdSHerbert Xu unsigned int daddroff; 7262fcb45b6SHerbert Xu unsigned int family; 7277785bba2SSteffen Klassert __be32 seq; 728716062fdSHerbert Xu }; 729716062fdSHerbert Xu 730716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 731716062fdSHerbert Xu 732c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 733afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 734ab5f5e8bSJoy Latten { 735ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 736ab5f5e8bSJoy Latten 737afeb14b4SPaul Moore if (audit_enabled == 0) 738afeb14b4SPaul Moore return NULL; 739ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 740ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 741ab5f5e8bSJoy Latten if (audit_buf == NULL) 742ab5f5e8bSJoy Latten return NULL; 743afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 744afeb14b4SPaul Moore return audit_buf; 745afeb14b4SPaul Moore } 746afeb14b4SPaul Moore 7472e71029eSTetsuo Handa static inline void xfrm_audit_helper_usrinfo(bool task_valid, 748afeb14b4SPaul Moore struct audit_buffer *audit_buf) 749afeb14b4SPaul Moore { 7502e71029eSTetsuo Handa const unsigned int auid = from_kuid(&init_user_ns, task_valid ? 7512e71029eSTetsuo Handa audit_get_loginuid(current) : 7522e71029eSTetsuo Handa INVALID_UID); 7532e71029eSTetsuo Handa const unsigned int ses = task_valid ? audit_get_sessionid(current) : 7542e71029eSTetsuo Handa (unsigned int) -1; 7552e71029eSTetsuo Handa 7562e71029eSTetsuo Handa audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 757ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 758ab5f5e8bSJoy Latten } 759ab5f5e8bSJoy Latten 7602e71029eSTetsuo Handa void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); 7612e71029eSTetsuo Handa void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7622e71029eSTetsuo Handa bool task_valid); 7632e71029eSTetsuo Handa void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); 7642e71029eSTetsuo Handa void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); 765d511337aSJoe Perches void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 766afeb14b4SPaul Moore struct sk_buff *skb); 767d511337aSJoe Perches void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, 768d511337aSJoe Perches __be32 net_seq); 769d511337aSJoe Perches void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 770d511337aSJoe Perches void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, 771d511337aSJoe Perches __be32 net_seq); 772d511337aSJoe Perches void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, 773d511337aSJoe Perches u8 proto); 774c9204d9cSJoy Latten #else 77541fef0eeSMarcin Slusarz 77641fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7772e71029eSTetsuo Handa bool task_valid) 77841fef0eeSMarcin Slusarz { 77941fef0eeSMarcin Slusarz } 78041fef0eeSMarcin Slusarz 78141fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7822e71029eSTetsuo Handa bool task_valid) 78341fef0eeSMarcin Slusarz { 78441fef0eeSMarcin Slusarz } 78541fef0eeSMarcin Slusarz 78641fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 7872e71029eSTetsuo Handa bool task_valid) 78841fef0eeSMarcin Slusarz { 78941fef0eeSMarcin Slusarz } 79041fef0eeSMarcin Slusarz 79141fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7922e71029eSTetsuo Handa bool task_valid) 79341fef0eeSMarcin Slusarz { 79441fef0eeSMarcin Slusarz } 79541fef0eeSMarcin Slusarz 79641fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 79741fef0eeSMarcin Slusarz struct sk_buff *skb) 79841fef0eeSMarcin Slusarz { 79941fef0eeSMarcin Slusarz } 80041fef0eeSMarcin Slusarz 8019fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 8029fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 8039fdc4883SSteffen Klassert { 8049fdc4883SSteffen Klassert } 8059fdc4883SSteffen Klassert 80641fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 80741fef0eeSMarcin Slusarz u16 family) 80841fef0eeSMarcin Slusarz { 80941fef0eeSMarcin Slusarz } 81041fef0eeSMarcin Slusarz 81141fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 81241fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 81341fef0eeSMarcin Slusarz { 81441fef0eeSMarcin Slusarz } 81541fef0eeSMarcin Slusarz 81641fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 81741fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 81841fef0eeSMarcin Slusarz { 81941fef0eeSMarcin Slusarz } 820c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 821161a09e7SJoy Latten 8221da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 8231da177e4SLinus Torvalds { 8241da177e4SLinus Torvalds if (likely(policy != NULL)) 825850a6212SReshetova, Elena refcount_inc(&policy->refcnt); 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 828d511337aSJoe Perches void xfrm_policy_destroy(struct xfrm_policy *policy); 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 8311da177e4SLinus Torvalds { 832850a6212SReshetova, Elena if (refcount_dec_and_test(&policy->refcnt)) 83364c31b3fSWANG Cong xfrm_policy_destroy(policy); 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds 8364e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 8374e81bb83SMasahide NAKAMURA { 8384e81bb83SMasahide NAKAMURA int i; 8394e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 8404e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 8414e81bb83SMasahide NAKAMURA } 8424e81bb83SMasahide NAKAMURA 843d511337aSJoe Perches void __xfrm_state_destroy(struct xfrm_state *); 8441da177e4SLinus Torvalds 84521380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 84621380b81SHerbert Xu { 84788755e9cSReshetova, Elena refcount_dec(&x->refcnt); 84821380b81SHerbert Xu } 84921380b81SHerbert Xu 8501da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 8511da177e4SLinus Torvalds { 85288755e9cSReshetova, Elena if (refcount_dec_and_test(&x->refcnt)) 8531da177e4SLinus Torvalds __xfrm_state_destroy(x); 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8571da177e4SLinus Torvalds { 85888755e9cSReshetova, Elena refcount_inc(&x->refcnt); 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds 8611744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 862e1b0048eSAlexey Dobriyan unsigned int prefixlen) 8631da177e4SLinus Torvalds { 8641744a8feSDavid S. Miller const __be32 *a1 = token1; 8651744a8feSDavid S. Miller const __be32 *a2 = token2; 866e1b0048eSAlexey Dobriyan unsigned int pdw; 867e1b0048eSAlexey Dobriyan unsigned int pbi; 8681da177e4SLinus Torvalds 869a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8701da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvalds if (pdw) 8731da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8741744a8feSDavid S. Miller return false; 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds if (pbi) { 8775f19343fSAl Viro __be32 mask; 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8821744a8feSDavid S. Miller return false; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds 8851744a8feSDavid S. Miller return true; 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds 88826bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 88926bff940SAlexey Dobriyan { 89026bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 8916c786bcbSAlexey Dobriyan if (sizeof(long) == 4 && prefixlen == 0) 89226bff940SAlexey Dobriyan return true; 8936c786bcbSAlexey Dobriyan return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); 89426bff940SAlexey Dobriyan } 89526bff940SAlexey Dobriyan 8961da177e4SLinus Torvalds static __inline__ 8976281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8981da177e4SLinus Torvalds { 899f9d07e41SAl Viro __be16 port; 9001d28f42cSDavid S. Miller switch(fl->flowi_proto) { 9011da177e4SLinus Torvalds case IPPROTO_TCP: 9021da177e4SLinus Torvalds case IPPROTO_UDP: 903ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 9041da177e4SLinus Torvalds case IPPROTO_SCTP: 9056281dcc9SDavid S. Miller port = uli->ports.sport; 9061da177e4SLinus Torvalds break; 9071da177e4SLinus Torvalds case IPPROTO_ICMP: 9081da177e4SLinus Torvalds case IPPROTO_ICMPV6: 9096281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 9101da177e4SLinus Torvalds break; 9112ce4272aSMasahide NAKAMURA case IPPROTO_MH: 9126281dcc9SDavid S. Miller port = htons(uli->mht.type); 9132ce4272aSMasahide NAKAMURA break; 914cc9ff19dSTimo Teräs case IPPROTO_GRE: 9156281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 916cc9ff19dSTimo Teräs break; 9171da177e4SLinus Torvalds default: 9181da177e4SLinus Torvalds port = 0; /*XXX*/ 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds return port; 9211da177e4SLinus Torvalds } 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds static __inline__ 9246281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 9251da177e4SLinus Torvalds { 926f9d07e41SAl Viro __be16 port; 9271d28f42cSDavid S. Miller switch(fl->flowi_proto) { 9281da177e4SLinus Torvalds case IPPROTO_TCP: 9291da177e4SLinus Torvalds case IPPROTO_UDP: 930ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 9311da177e4SLinus Torvalds case IPPROTO_SCTP: 9326281dcc9SDavid S. Miller port = uli->ports.dport; 9331da177e4SLinus Torvalds break; 9341da177e4SLinus Torvalds case IPPROTO_ICMP: 9351da177e4SLinus Torvalds case IPPROTO_ICMPV6: 9366281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 9371da177e4SLinus Torvalds break; 938cc9ff19dSTimo Teräs case IPPROTO_GRE: 9396281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 940cc9ff19dSTimo Teräs break; 9411da177e4SLinus Torvalds default: 9421da177e4SLinus Torvalds port = 0; /*XXX*/ 9431da177e4SLinus Torvalds } 9441da177e4SLinus Torvalds return port; 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds 947d511337aSJoe Perches bool xfrm_selector_match(const struct xfrm_selector *sel, 948d511337aSJoe Perches const struct flowi *fl, unsigned short family); 9491da177e4SLinus Torvalds 950df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 951df71837dSTrent Jaeger /* If neither has a context --> match 952df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 953df71837dSTrent Jaeger */ 954bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 955df71837dSTrent Jaeger { 956df71837dSTrent Jaeger return ((!s1 && !s2) || 957df71837dSTrent Jaeger (s1 && s2 && 958df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 959df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 960df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 961df71837dSTrent Jaeger } 962df71837dSTrent Jaeger #else 963bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 964df71837dSTrent Jaeger { 965bc9b35adSDavid S. Miller return true; 966df71837dSTrent Jaeger } 967df71837dSTrent Jaeger #endif 968df71837dSTrent Jaeger 9691da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9701da177e4SLinus Torvalds * 971b6ca8bd5SDavid Miller * xdst->child points to the next element of bundle. 9721da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9731da177e4SLinus Torvalds * 9741da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9751da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9761da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9771da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9781da177e4SLinus Torvalds * policy rule. 9791da177e4SLinus Torvalds */ 980fd2c3ef7SEric Dumazet struct xfrm_dst { 9811da177e4SLinus Torvalds union { 9821da177e4SLinus Torvalds struct dst_entry dst; 9831da177e4SLinus Torvalds struct rtable rt; 9841da177e4SLinus Torvalds struct rt6_info rt6; 9851da177e4SLinus Torvalds } u; 9861da177e4SLinus Torvalds struct dst_entry *route; 987b6ca8bd5SDavid Miller struct dst_entry *child; 9880f6c480fSDavid Miller struct dst_entry *path; 98980c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 99080c802f3STimo Teräs int num_pols, num_xfrms; 99180c802f3STimo Teräs u32 xfrm_genid; 99280c802f3STimo Teräs u32 policy_genid; 9931da177e4SLinus Torvalds u32 route_mtu_cached; 9941da177e4SLinus Torvalds u32 child_mtu_cached; 99592d63decSHideaki YOSHIFUJI u32 route_cookie; 99692d63decSHideaki YOSHIFUJI u32 path_cookie; 9971da177e4SLinus Torvalds }; 9981da177e4SLinus Torvalds 9990f6c480fSDavid Miller static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst) 10000f6c480fSDavid Miller { 10010f6c480fSDavid Miller #ifdef CONFIG_XFRM 10020f6c480fSDavid Miller if (dst->xfrm) { 10030f6c480fSDavid Miller const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst; 10040f6c480fSDavid Miller 10050f6c480fSDavid Miller return xdst->path; 10060f6c480fSDavid Miller } 10070f6c480fSDavid Miller #endif 10080f6c480fSDavid Miller return (struct dst_entry *) dst; 10090f6c480fSDavid Miller } 10100f6c480fSDavid Miller 1011b92cf4aaSDavid Miller static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst) 1012b92cf4aaSDavid Miller { 1013b92cf4aaSDavid Miller #ifdef CONFIG_XFRM 1014b6ca8bd5SDavid Miller if (dst->xfrm) { 1015b6ca8bd5SDavid Miller struct xfrm_dst *xdst = (struct xfrm_dst *) dst; 1016b6ca8bd5SDavid Miller return xdst->child; 1017b6ca8bd5SDavid Miller } 1018b92cf4aaSDavid Miller #endif 1019b92cf4aaSDavid Miller return NULL; 1020b92cf4aaSDavid Miller } 1021b92cf4aaSDavid Miller 1022def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 102345b018beSDavid Miller static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child) 102445b018beSDavid Miller { 1025b6ca8bd5SDavid Miller xdst->child = child; 102645b018beSDavid Miller } 102745b018beSDavid Miller 1028aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 1029aabc9761SHerbert Xu { 103080c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 1031aabc9761SHerbert Xu dst_release(xdst->route); 1032aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 1033aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 1034aabc9761SHerbert Xu } 1035def8b4faSAlexey Dobriyan #endif 1036aabc9761SHerbert Xu 1037d511337aSJoe Perches void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 1038aabc9761SHerbert Xu 103954ef207aSSteffen Klassert struct xfrm_offload { 104054ef207aSSteffen Klassert /* Output sequence number for replay protection on offloading. */ 104154ef207aSSteffen Klassert struct { 104254ef207aSSteffen Klassert __u32 low; 104354ef207aSSteffen Klassert __u32 hi; 104454ef207aSSteffen Klassert } seq; 104554ef207aSSteffen Klassert 104654ef207aSSteffen Klassert __u32 flags; 104754ef207aSSteffen Klassert #define SA_DELETE_REQ 1 104854ef207aSSteffen Klassert #define CRYPTO_DONE 2 104954ef207aSSteffen Klassert #define CRYPTO_NEXT_DONE 4 105054ef207aSSteffen Klassert #define CRYPTO_FALLBACK 8 105154ef207aSSteffen Klassert #define XFRM_GSO_SEGMENT 16 105254ef207aSSteffen Klassert #define XFRM_GRO 32 105347ebcc0bSYossi Kuperman #define XFRM_ESP_NO_TRAILER 64 105454ef207aSSteffen Klassert 105554ef207aSSteffen Klassert __u32 status; 105654ef207aSSteffen Klassert #define CRYPTO_SUCCESS 1 105754ef207aSSteffen Klassert #define CRYPTO_GENERIC_ERROR 2 105854ef207aSSteffen Klassert #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 105954ef207aSSteffen Klassert #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 106054ef207aSSteffen Klassert #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 106154ef207aSSteffen Klassert #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 106254ef207aSSteffen Klassert #define CRYPTO_INVALID_PACKET_SYNTAX 64 106354ef207aSSteffen Klassert #define CRYPTO_INVALID_PROTOCOL 128 106454ef207aSSteffen Klassert 106554ef207aSSteffen Klassert __u8 proto; 106654ef207aSSteffen Klassert }; 106754ef207aSSteffen Klassert 1068fd2c3ef7SEric Dumazet struct sec_path { 106955eabed6SReshetova, Elena refcount_t refcnt; 10701da177e4SLinus Torvalds int len; 107154ef207aSSteffen Klassert int olen; 107254ef207aSSteffen Klassert 1073dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 107454ef207aSSteffen Klassert struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; 10751da177e4SLinus Torvalds }; 10761da177e4SLinus Torvalds 1077990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 1078990078afSMichael Smith { 1079990078afSMichael Smith #ifdef CONFIG_XFRM 1080990078afSMichael Smith return skb->sp != NULL; 1081990078afSMichael Smith #else 1082990078afSMichael Smith return 0; 1083990078afSMichael Smith #endif 1084990078afSMichael Smith } 1085990078afSMichael Smith 10861da177e4SLinus Torvalds static inline struct sec_path * 10871da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 10881da177e4SLinus Torvalds { 10891da177e4SLinus Torvalds if (sp) 109055eabed6SReshetova, Elena refcount_inc(&sp->refcnt); 10911da177e4SLinus Torvalds return sp; 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds 1094d511337aSJoe Perches void __secpath_destroy(struct sec_path *sp); 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds static inline void 10971da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 10981da177e4SLinus Torvalds { 109955eabed6SReshetova, Elena if (sp && refcount_dec_and_test(&sp->refcnt)) 11001da177e4SLinus Torvalds __secpath_destroy(sp); 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 1103d511337aSJoe Perches struct sec_path *secpath_dup(struct sec_path *src); 1104b0fcee82SSteffen Klassert int secpath_set(struct sk_buff *skb); 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds static inline void 11071da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 11081da177e4SLinus Torvalds { 11091da177e4SLinus Torvalds #ifdef CONFIG_XFRM 11101da177e4SLinus Torvalds secpath_put(skb->sp); 11111da177e4SLinus Torvalds skb->sp = NULL; 11121da177e4SLinus Torvalds #endif 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds 11151da177e4SLinus Torvalds static inline int 11166cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1117a1e59abfSPatrick McHardy { 1118a1e59abfSPatrick McHardy switch (family) { 1119a1e59abfSPatrick McHardy case AF_INET: 1120a1e59abfSPatrick McHardy return addr->a4 == 0; 1121a1e59abfSPatrick McHardy case AF_INET6: 112215e318bdSJiri Benc return ipv6_addr_any(&addr->in6); 1123a1e59abfSPatrick McHardy } 1124a1e59abfSPatrick McHardy return 0; 1125a1e59abfSPatrick McHardy } 1126a1e59abfSPatrick McHardy 1127a1e59abfSPatrick McHardy static inline int 112821eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds return (tmpl->saddr.a4 && 11311da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds 11341da177e4SLinus Torvalds static inline int 113521eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 1138ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 11391da177e4SLinus Torvalds } 11401da177e4SLinus Torvalds 11411da177e4SLinus Torvalds static inline int 114221eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 11431da177e4SLinus Torvalds { 11441da177e4SLinus Torvalds switch (family) { 11451da177e4SLinus Torvalds case AF_INET: 11461da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 11471da177e4SLinus Torvalds case AF_INET6: 11481da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds return !0; 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 11531da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1154d511337aSJoe Perches int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, 1155d511337aSJoe Perches unsigned short family); 11561da177e4SLinus Torvalds 1157d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1158d5422efeSHerbert Xu struct sk_buff *skb, 1159d5422efeSHerbert Xu unsigned int family, int reverse) 11601da177e4SLinus Torvalds { 1161f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1162d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1163d5422efeSHerbert Xu 11641da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1165d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 11661da177e4SLinus Torvalds 1167f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1168adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1169d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1170d5422efeSHerbert Xu } 1171d5422efeSHerbert Xu 1172d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1173d5422efeSHerbert Xu { 1174d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 11751da177e4SLinus Torvalds } 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11781da177e4SLinus Torvalds { 11791da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11831da177e4SLinus Torvalds { 11841da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds 1187d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1188d5422efeSHerbert Xu struct sk_buff *skb) 1189d5422efeSHerbert Xu { 1190d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1191d5422efeSHerbert Xu } 1192d5422efeSHerbert Xu 1193d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1194d5422efeSHerbert Xu struct sk_buff *skb) 1195d5422efeSHerbert Xu { 1196d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1197d5422efeSHerbert Xu } 1198d5422efeSHerbert Xu 1199d511337aSJoe Perches int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1200d5422efeSHerbert Xu unsigned int family, int reverse); 1201d5422efeSHerbert Xu 1202d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1203d5422efeSHerbert Xu unsigned int family) 1204d5422efeSHerbert Xu { 1205d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1206d5422efeSHerbert Xu } 1207d5422efeSHerbert Xu 1208d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1209d5422efeSHerbert Xu struct flowi *fl, 1210d5422efeSHerbert Xu unsigned int family) 1211d5422efeSHerbert Xu { 1212d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1213d5422efeSHerbert Xu } 1214d5422efeSHerbert Xu 1215d511337aSJoe Perches int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 12181da177e4SLinus Torvalds { 121999a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 122099a66657SAlexey Dobriyan 122199a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1222adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 12231da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 12271da177e4SLinus Torvalds { 12281da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 12291da177e4SLinus Torvalds } 12301da177e4SLinus Torvalds 12311da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 12321da177e4SLinus Torvalds { 12331da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 1236d188ba86SEric Dumazet int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); 12371da177e4SLinus Torvalds 1238d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) 12391da177e4SLinus Torvalds { 1240d188ba86SEric Dumazet sk->sk_policy[0] = NULL; 1241d188ba86SEric Dumazet sk->sk_policy[1] = NULL; 1242d188ba86SEric Dumazet if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) 1243d188ba86SEric Dumazet return __xfrm_sk_clone_policy(sk, osk); 12441da177e4SLinus Torvalds return 0; 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds 1247d511337aSJoe Perches int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 12501da177e4SLinus Torvalds { 1251d188ba86SEric Dumazet struct xfrm_policy *pol; 1252d188ba86SEric Dumazet 1253d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[0], 1); 1254d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1255d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX); 12561da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 12571da177e4SLinus Torvalds } 1258d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[1], 1); 1259d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1260d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); 12611da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 12621da177e4SLinus Torvalds } 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds #else 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 1268d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } 12691da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 12701da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 12711da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 12721da177e4SLinus Torvalds { 12731da177e4SLinus Torvalds return 1; 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 12761da177e4SLinus Torvalds { 12771da177e4SLinus Torvalds return 1; 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 12801da177e4SLinus Torvalds { 12811da177e4SLinus Torvalds return 1; 12821da177e4SLinus Torvalds } 1283d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1284d5422efeSHerbert Xu struct flowi *fl, 1285d5422efeSHerbert Xu unsigned int family) 1286d5422efeSHerbert Xu { 1287d5422efeSHerbert Xu return -ENOSYS; 1288d5422efeSHerbert Xu } 1289d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1290d5422efeSHerbert Xu struct sk_buff *skb) 1291d5422efeSHerbert Xu { 1292d5422efeSHerbert Xu return 1; 1293d5422efeSHerbert Xu } 1294d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1295d5422efeSHerbert Xu struct sk_buff *skb) 1296d5422efeSHerbert Xu { 1297d5422efeSHerbert Xu return 1; 1298d5422efeSHerbert Xu } 12991da177e4SLinus Torvalds #endif 13001da177e4SLinus Torvalds 13011da177e4SLinus Torvalds static __inline__ 1302e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 13031da177e4SLinus Torvalds { 13041da177e4SLinus Torvalds switch (family){ 13051da177e4SLinus Torvalds case AF_INET: 13067e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 13071da177e4SLinus Torvalds case AF_INET6: 13087e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds return NULL; 13111da177e4SLinus Torvalds } 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds static __inline__ 1314e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 13151da177e4SLinus Torvalds { 13161da177e4SLinus Torvalds switch (family){ 13171da177e4SLinus Torvalds case AF_INET: 13187e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 13191da177e4SLinus Torvalds case AF_INET6: 13207e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds return NULL; 13231da177e4SLinus Torvalds } 13241da177e4SLinus Torvalds 13259bb182a7SYOSHIFUJI Hideaki static __inline__ 1326e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 13279bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 13289bb182a7SYOSHIFUJI Hideaki unsigned short family) 13299bb182a7SYOSHIFUJI Hideaki { 13309bb182a7SYOSHIFUJI Hideaki switch(family) { 13319bb182a7SYOSHIFUJI Hideaki case AF_INET: 13327e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 13337e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 13349bb182a7SYOSHIFUJI Hideaki break; 13359bb182a7SYOSHIFUJI Hideaki case AF_INET6: 133615e318bdSJiri Benc saddr->in6 = fl->u.ip6.saddr; 133715e318bdSJiri Benc daddr->in6 = fl->u.ip6.daddr; 13389bb182a7SYOSHIFUJI Hideaki break; 13399bb182a7SYOSHIFUJI Hideaki } 13409bb182a7SYOSHIFUJI Hideaki } 13419bb182a7SYOSHIFUJI Hideaki 13421da177e4SLinus Torvalds static __inline__ int 1343f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1344f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 13451da177e4SLinus Torvalds { 13461da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 13471da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 13481da177e4SLinus Torvalds return 1; 13491da177e4SLinus Torvalds return 0; 13501da177e4SLinus Torvalds } 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds static __inline__ int 1353f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1354f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 13551da177e4SLinus Torvalds { 1356ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 1357ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || 13581da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 13591da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 13601da177e4SLinus Torvalds return 1; 13611da177e4SLinus Torvalds return 0; 13621da177e4SLinus Torvalds } 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds static __inline__ int 1365f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1366f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 13671da177e4SLinus Torvalds unsigned short family) 13681da177e4SLinus Torvalds { 13691da177e4SLinus Torvalds switch (family) { 13701da177e4SLinus Torvalds case AF_INET: 13711da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 13721da177e4SLinus Torvalds case AF_INET6: 13731da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 13741da177e4SLinus Torvalds } 13751da177e4SLinus Torvalds return 0; 13761da177e4SLinus Torvalds } 13771da177e4SLinus Torvalds 1378e53820deSMasahide NAKAMURA static __inline__ int 1379f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1380e53820deSMasahide NAKAMURA unsigned short family) 1381e53820deSMasahide NAKAMURA { 1382e53820deSMasahide NAKAMURA switch (family) { 1383e53820deSMasahide NAKAMURA case AF_INET: 1384e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 13857e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 13867e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1387e53820deSMasahide NAKAMURA case AF_INET6: 1388e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 13897e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 13907e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1391e53820deSMasahide NAKAMURA } 1392e53820deSMasahide NAKAMURA return 0; 1393e53820deSMasahide NAKAMURA } 1394e53820deSMasahide NAKAMURA 1395f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 13961da177e4SLinus Torvalds { 13971da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 13981da177e4SLinus Torvalds } 13991da177e4SLinus Torvalds 14005794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 14015794708fSMasahide NAKAMURA { 1402dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1403dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1404dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1405dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 14065794708fSMasahide NAKAMURA } 14075794708fSMasahide NAKAMURA 14081da177e4SLinus Torvalds /* 14091da177e4SLinus Torvalds * xfrm algorithm information 14101da177e4SLinus Torvalds */ 14111a6509d9SHerbert Xu struct xfrm_algo_aead_info { 1412165ecc63SHerbert Xu char *geniv; 14131a6509d9SHerbert Xu u16 icv_truncbits; 14141a6509d9SHerbert Xu }; 14151a6509d9SHerbert Xu 14161da177e4SLinus Torvalds struct xfrm_algo_auth_info { 14171da177e4SLinus Torvalds u16 icv_truncbits; 14181da177e4SLinus Torvalds u16 icv_fullbits; 14191da177e4SLinus Torvalds }; 14201da177e4SLinus Torvalds 14211da177e4SLinus Torvalds struct xfrm_algo_encr_info { 1422165ecc63SHerbert Xu char *geniv; 14231da177e4SLinus Torvalds u16 blockbits; 14241da177e4SLinus Torvalds u16 defkeybits; 14251da177e4SLinus Torvalds }; 14261da177e4SLinus Torvalds 14271da177e4SLinus Torvalds struct xfrm_algo_comp_info { 14281da177e4SLinus Torvalds u16 threshold; 14291da177e4SLinus Torvalds }; 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds struct xfrm_algo_desc { 14321da177e4SLinus Torvalds char *name; 143304ff1260SHerbert Xu char *compat; 14341da177e4SLinus Torvalds u8 available:1; 14357e50f84cSJussi Kivilinna u8 pfkey_supported:1; 14361da177e4SLinus Torvalds union { 14371a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 14381da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 14391da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 14401da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 14411da177e4SLinus Torvalds } uinfo; 14421da177e4SLinus Torvalds struct sadb_alg desc; 14431da177e4SLinus Torvalds }; 14441da177e4SLinus Torvalds 14453328715eSSteffen Klassert /* XFRM protocol handlers. */ 14463328715eSSteffen Klassert struct xfrm4_protocol { 14473328715eSSteffen Klassert int (*handler)(struct sk_buff *skb); 14483328715eSSteffen Klassert int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, 14493328715eSSteffen Klassert int encap_type); 14503328715eSSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 14513328715eSSteffen Klassert int (*err_handler)(struct sk_buff *skb, u32 info); 14523328715eSSteffen Klassert 14533328715eSSteffen Klassert struct xfrm4_protocol __rcu *next; 14543328715eSSteffen Klassert int priority; 14553328715eSSteffen Klassert }; 14563328715eSSteffen Klassert 14577e14ea15SSteffen Klassert struct xfrm6_protocol { 14587e14ea15SSteffen Klassert int (*handler)(struct sk_buff *skb); 14597e14ea15SSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 14607e14ea15SSteffen Klassert int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 14617e14ea15SSteffen Klassert u8 type, u8 code, int offset, __be32 info); 14627e14ea15SSteffen Klassert 14637e14ea15SSteffen Klassert struct xfrm6_protocol __rcu *next; 14647e14ea15SSteffen Klassert int priority; 14657e14ea15SSteffen Klassert }; 14667e14ea15SSteffen Klassert 14671da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 14681da177e4SLinus Torvalds struct xfrm_tunnel { 14691da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1470a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1471d2acc347SHerbert Xu 1472b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1473d2acc347SHerbert Xu int priority; 14741da177e4SLinus Torvalds }; 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds struct xfrm6_tunnel { 1477d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1478d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1479d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 14806f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1481d2acc347SHerbert Xu int priority; 14821da177e4SLinus Torvalds }; 14831da177e4SLinus Torvalds 1484d511337aSJoe Perches void xfrm_init(void); 1485d511337aSJoe Perches void xfrm4_init(void); 1486d511337aSJoe Perches int xfrm_state_init(struct net *net); 1487d511337aSJoe Perches void xfrm_state_fini(struct net *net); 1488d511337aSJoe Perches void xfrm4_state_init(void); 14892f32b51bSSteffen Klassert void xfrm4_protocol_init(void); 1490c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1491d511337aSJoe Perches int xfrm6_init(void); 1492d511337aSJoe Perches void xfrm6_fini(void); 1493d511337aSJoe Perches int xfrm6_state_init(void); 1494d511337aSJoe Perches void xfrm6_state_fini(void); 14957e14ea15SSteffen Klassert int xfrm6_protocol_init(void); 14967e14ea15SSteffen Klassert void xfrm6_protocol_fini(void); 1497c35b7e72SDaniel Lezcano #else 1498c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1499c35b7e72SDaniel Lezcano { 1500c35b7e72SDaniel Lezcano return 0; 1501c35b7e72SDaniel Lezcano } 1502c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1503c35b7e72SDaniel Lezcano { 1504c35b7e72SDaniel Lezcano ; 1505c35b7e72SDaniel Lezcano } 1506c35b7e72SDaniel Lezcano #endif 15071da177e4SLinus Torvalds 1508558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1509d511337aSJoe Perches int xfrm_proc_init(struct net *net); 1510d511337aSJoe Perches void xfrm_proc_fini(struct net *net); 1511558f82efSMasahide NAKAMURA #endif 1512558f82efSMasahide NAKAMURA 1513d511337aSJoe Perches int xfrm_sysctl_init(struct net *net); 1514b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1515d511337aSJoe Perches void xfrm_sysctl_fini(struct net *net); 1516b27aeadbSAlexey Dobriyan #else 1517b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1518b27aeadbSAlexey Dobriyan { 1519b27aeadbSAlexey Dobriyan } 1520b27aeadbSAlexey Dobriyan #endif 1521b27aeadbSAlexey Dobriyan 1522d3623099SNicolas Dichtel void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, 1523870a2df4SNicolas Dichtel struct xfrm_address_filter *filter); 1524d511337aSJoe Perches int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 15254c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1526283bc9f3SFan Du void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); 1527d511337aSJoe Perches struct xfrm_state *xfrm_state_alloc(struct net *net); 1528d511337aSJoe Perches struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 152933765d06SDavid S. Miller const xfrm_address_t *saddr, 1530b520e9f6SDavid S. Miller const struct flowi *fl, 1531b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 15321da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 15331da177e4SLinus Torvalds unsigned short family); 1534d511337aSJoe Perches struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 15355447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1536628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1537628529b6SJamal Hadi Salim unsigned short family, 1538628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 1539c454997eSFan Du struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, 1540c454997eSFan Du unsigned short family); 1541d511337aSJoe Perches int xfrm_state_check_expire(struct xfrm_state *x); 1542d511337aSJoe Perches void xfrm_state_insert(struct xfrm_state *x); 1543d511337aSJoe Perches int xfrm_state_add(struct xfrm_state *x); 1544d511337aSJoe Perches int xfrm_state_update(struct xfrm_state *x); 1545d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1546a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1547bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1548d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1549a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1550a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1551bd55775cSJamal Hadi Salim u8 proto, 1552bd55775cSJamal Hadi Salim unsigned short family); 155341a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1554d511337aSJoe Perches int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 1555283bc9f3SFan Du unsigned short family, struct net *net); 1556d511337aSJoe Perches int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 1557d511337aSJoe Perches unsigned short family); 155841a49cc3SMasahide NAKAMURA #else 155941a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 1560283bc9f3SFan Du int n, unsigned short family, struct net *net) 156141a49cc3SMasahide NAKAMURA { 156241a49cc3SMasahide NAKAMURA return -ENOSYS; 156341a49cc3SMasahide NAKAMURA } 156441a49cc3SMasahide NAKAMURA 156541a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 156641a49cc3SMasahide NAKAMURA int n, unsigned short family) 156741a49cc3SMasahide NAKAMURA { 156841a49cc3SMasahide NAKAMURA return -ENOSYS; 156941a49cc3SMasahide NAKAMURA } 157041a49cc3SMasahide NAKAMURA #endif 1571af11e316SJamal Hadi Salim 1572af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1573af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1574af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1575af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1576af11e316SJamal Hadi Salim }; 1577af11e316SJamal Hadi Salim 15785a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 15795a6d3416SJamal Hadi Salim u32 incnt; 15805a6d3416SJamal Hadi Salim u32 outcnt; 15815a6d3416SJamal Hadi Salim u32 fwdcnt; 15825a6d3416SJamal Hadi Salim u32 inscnt; 15835a6d3416SJamal Hadi Salim u32 outscnt; 15845a6d3416SJamal Hadi Salim u32 fwdscnt; 15855a6d3416SJamal Hadi Salim u32 spdhcnt; 15865a6d3416SJamal Hadi Salim u32 spdhmcnt; 15875a6d3416SJamal Hadi Salim }; 15885a6d3416SJamal Hadi Salim 1589d511337aSJoe Perches struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 1590d511337aSJoe Perches int xfrm_state_delete(struct xfrm_state *x); 15912e71029eSTetsuo Handa int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); 1592d77e38e6SSteffen Klassert int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); 1593d511337aSJoe Perches void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1594d511337aSJoe Perches void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1595d511337aSJoe Perches u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 1596d511337aSJoe Perches int xfrm_init_replay(struct xfrm_state *x); 1597d511337aSJoe Perches int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1598ffdb5211SIlan Tayari int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload); 1599d511337aSJoe Perches int xfrm_init_state(struct xfrm_state *x); 1600d511337aSJoe Perches int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1601d511337aSJoe Perches int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); 1602d511337aSJoe Perches int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1603d511337aSJoe Perches int xfrm_output_resume(struct sk_buff *skb, int err); 16047026b1ddSDavid Miller int xfrm_output(struct sock *sk, struct sk_buff *skb); 1605d511337aSJoe Perches int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1606d511337aSJoe Perches void xfrm_local_error(struct sk_buff *skb, int mtu); 1607d511337aSJoe Perches int xfrm4_extract_header(struct sk_buff *skb); 1608d511337aSJoe Perches int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1609d511337aSJoe Perches int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1610716062fdSHerbert Xu int encap_type); 1611d511337aSJoe Perches int xfrm4_transport_finish(struct sk_buff *skb, int async); 1612d511337aSJoe Perches int xfrm4_rcv(struct sk_buff *skb); 16131e295370SSteffen Klassert int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 1614c4541b41SHerbert Xu 1615c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1616c4541b41SHerbert Xu { 161770be6c91SSteffen Klassert XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; 16183328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->family = AF_INET; 16193328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); 16203328715eSSteffen Klassert return xfrm_input(skb, nexthdr, spi, 0); 1621c4541b41SHerbert Xu } 1622c4541b41SHerbert Xu 1623d511337aSJoe Perches int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1624d511337aSJoe Perches int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1625ede2059dSEric W. Biederman int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); 16267026b1ddSDavid Miller int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); 16273328715eSSteffen Klassert int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 16283328715eSSteffen Klassert int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); 16293328715eSSteffen Klassert int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); 1630d511337aSJoe Perches int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1631d511337aSJoe Perches int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1632d511337aSJoe Perches void xfrm4_local_error(struct sk_buff *skb, u32 mtu); 1633d511337aSJoe Perches int xfrm6_extract_header(struct sk_buff *skb); 1634d511337aSJoe Perches int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 163563c43787SNicolas Dichtel int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, 163663c43787SNicolas Dichtel struct ip6_tnl *t); 1637d511337aSJoe Perches int xfrm6_transport_finish(struct sk_buff *skb, int async); 163863c43787SNicolas Dichtel int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); 1639d511337aSJoe Perches int xfrm6_rcv(struct sk_buff *skb); 1640d511337aSJoe Perches int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1641fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 16427b77d161SDavid S. Miller void xfrm6_local_error(struct sk_buff *skb, u32 mtu); 16437e14ea15SSteffen Klassert int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 16447e14ea15SSteffen Klassert int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); 16457e14ea15SSteffen Klassert int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); 1646d511337aSJoe Perches int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 16477b77d161SDavid S. Miller int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1648d511337aSJoe Perches __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1649d511337aSJoe Perches __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 1650d511337aSJoe Perches int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1651d511337aSJoe Perches int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1652ede2059dSEric W. Biederman int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); 16537026b1ddSDavid Miller int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); 1654d511337aSJoe Perches int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1655aee5adb4SMasahide NAKAMURA u8 **prevhdr); 16561da177e4SLinus Torvalds 16571da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1658d511337aSJoe Perches int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 1659d511337aSJoe Perches int xfrm_user_policy(struct sock *sk, int optname, 1660d511337aSJoe Perches u8 __user *optval, int optlen); 16611da177e4SLinus Torvalds #else 16621da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 16631da177e4SLinus Torvalds { 16641da177e4SLinus Torvalds return -ENOPROTOOPT; 16651da177e4SLinus Torvalds } 16661da177e4SLinus Torvalds 1667067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 16681da177e4SLinus Torvalds { 16691da177e4SLinus Torvalds /* should not happen */ 16701da177e4SLinus Torvalds kfree_skb(skb); 16711da177e4SLinus Torvalds return 0; 16721da177e4SLinus Torvalds } 16731da177e4SLinus Torvalds #endif 16741da177e4SLinus Torvalds 1675d77e38e6SSteffen Klassert struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, 1676d77e38e6SSteffen Klassert const xfrm_address_t *saddr, 1677d77e38e6SSteffen Klassert const xfrm_address_t *daddr, 1678077fbac4SLorenzo Colitti int family, u32 mark); 1679d77e38e6SSteffen Klassert 16800331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 16814c563f76STimo Teras 1682d511337aSJoe Perches void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1683d511337aSJoe Perches int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 1684d511337aSJoe Perches int (*func)(struct xfrm_policy *, int, int, void*), 1685d511337aSJoe Perches void *); 1686283bc9f3SFan Du void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); 16871da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 16888ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 16898ca2e93bSJamal Hadi Salim u8 type, int dir, 16904e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1691ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1692ef41aaa0SEric Paris int *err); 1693d511337aSJoe Perches struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, 1694d511337aSJoe Perches u32 id, int delete, int *err); 16952e71029eSTetsuo Handa int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); 1696880a6fabSChristophe Gouault void xfrm_policy_hash_rebuild(struct net *net); 16971da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1698776e9dd9SFan Du int verify_spi_info(u8 proto, u32 min, u32 max); 1699d511337aSJoe Perches int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1700e473fcb4SMathias Krause struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, 1701bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1702a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1703a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1704bd55775cSJamal Hadi Salim unsigned short family); 1705d511337aSJoe Perches int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 17061da177e4SLinus Torvalds 170780c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1708d511337aSJoe Perches int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1709183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 17108bafd730SAntony Antony const struct xfrm_kmaddress *k, 17118bafd730SAntony Antony const struct xfrm_encap_tmpl *encap); 1712283bc9f3SFan Du struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); 1713d511337aSJoe Perches struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, 17144ab47d47SAntony Antony struct xfrm_migrate *m, 17154ab47d47SAntony Antony struct xfrm_encap_tmpl *encap); 1716d511337aSJoe Perches int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 171713c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 17184ab47d47SAntony Antony struct xfrm_kmaddress *k, struct net *net, 17194ab47d47SAntony Antony struct xfrm_encap_tmpl *encap); 172080c9abaaSShinta Sugimoto #endif 172180c9abaaSShinta Sugimoto 1722d511337aSJoe Perches int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 1723d511337aSJoe Perches void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); 1724d511337aSJoe Perches int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, 1725d511337aSJoe Perches xfrm_address_t *addr); 17261da177e4SLinus Torvalds 1727d511337aSJoe Perches void xfrm_input_init(void); 1728d511337aSJoe Perches int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 17291da177e4SLinus Torvalds 1730d511337aSJoe Perches void xfrm_probe_algs(void); 1731d511337aSJoe Perches int xfrm_count_pfkey_auth_supported(void); 1732d511337aSJoe Perches int xfrm_count_pfkey_enc_supported(void); 1733d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 1734d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 1735d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 1736d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 1737d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 1738d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 1739d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 1740d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 1741d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 17421a6509d9SHerbert Xu int probe); 17431da177e4SLinus Torvalds 1744ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm6_addr_equal(const xfrm_address_t *a, 1745ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b) 1746ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 { 1747ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_equal((const struct in6_addr *)a, 1748ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (const struct in6_addr *)b); 1749ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 } 1750ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 175170e94e66SYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm_addr_equal(const xfrm_address_t *a, 175270e94e66SYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b, 175370e94e66SYOSHIFUJI Hideaki / 吉藤英明 sa_family_t family) 175470e94e66SYOSHIFUJI Hideaki / 吉藤英明 { 175570e94e66SYOSHIFUJI Hideaki / 吉藤英明 switch (family) { 175670e94e66SYOSHIFUJI Hideaki / 吉藤英明 default: 175770e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET: 175870e94e66SYOSHIFUJI Hideaki / 吉藤英明 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; 175970e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET6: 176070e94e66SYOSHIFUJI Hideaki / 吉藤英明 return xfrm6_addr_equal(a, b); 176170e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 176270e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 176370e94e66SYOSHIFUJI Hideaki / 吉藤英明 176477d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 176577d8d7a6SHerbert Xu { 176677d8d7a6SHerbert Xu return index & 7; 176777d8d7a6SHerbert Xu } 176877d8d7a6SHerbert Xu 1769a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1770a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1771f8cd5488SJamal Hadi Salim { 1772be33690dSPatrick McHardy struct sock *nlsk; 1773be33690dSPatrick McHardy int ret = 0; 1774be33690dSPatrick McHardy 1775be33690dSPatrick McHardy rcu_read_lock(); 1776a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1777be33690dSPatrick McHardy if (nlsk) 1778be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1779be33690dSPatrick McHardy rcu_read_unlock(); 1780be33690dSPatrick McHardy return ret; 1781f8cd5488SJamal Hadi Salim } 17820f24558eSHoria Geanta 17830f24558eSHoria Geanta static inline int xfrm_acquire_is_on(struct net *net) 17840f24558eSHoria Geanta { 17850f24558eSHoria Geanta struct sock *nlsk; 17860f24558eSHoria Geanta int ret = 0; 17870f24558eSHoria Geanta 17880f24558eSHoria Geanta rcu_read_lock(); 17890f24558eSHoria Geanta nlsk = rcu_dereference(net->xfrm.nlsk); 17900f24558eSHoria Geanta if (nlsk) 17910f24558eSHoria Geanta ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); 17920f24558eSHoria Geanta rcu_read_unlock(); 17930f24558eSHoria Geanta 17940f24558eSHoria Geanta return ret; 17950f24558eSHoria Geanta } 1796a6483b79SAlexey Dobriyan #endif 1797f8cd5488SJamal Hadi Salim 1798373b8eebSAlexey Dobriyan static inline unsigned int aead_len(struct xfrm_algo_aead *alg) 1799ee5c2317SSteffen Klassert { 1800ee5c2317SSteffen Klassert return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 1801ee5c2317SSteffen Klassert } 1802ee5c2317SSteffen Klassert 180306cd22f8SAlexey Dobriyan static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg) 18040f99be0dSEric Dumazet { 18050f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 18060f99be0dSEric Dumazet } 18070f99be0dSEric Dumazet 18081bd963a7SAlexey Dobriyan static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 18094447bb33SMartin Willi { 18104447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 18114447bb33SMartin Willi } 18124447bb33SMartin Willi 18135e708e47SAlexey Dobriyan static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 18149736acf3SSteffen Klassert { 18159736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 18169736acf3SSteffen Klassert } 18179736acf3SSteffen Klassert 181880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1819af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1820af2f464eSSteffen Klassert struct xfrm_state *orig) 1821af2f464eSSteffen Klassert { 1822af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1823af2f464eSSteffen Klassert GFP_KERNEL); 1824af2f464eSSteffen Klassert if (!x->replay_esn) 1825af2f464eSSteffen Klassert return -ENOMEM; 1826af2f464eSSteffen Klassert 1827af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1828af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1829af2f464eSSteffen Klassert 1830af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1831af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1832af2f464eSSteffen Klassert GFP_KERNEL); 1833af2f464eSSteffen Klassert if (!x->preplay_esn) { 1834af2f464eSSteffen Klassert kfree(x->replay_esn); 1835af2f464eSSteffen Klassert return -ENOMEM; 1836af2f464eSSteffen Klassert } 1837af2f464eSSteffen Klassert 1838af2f464eSSteffen Klassert return 0; 1839af2f464eSSteffen Klassert } 1840af2f464eSSteffen Klassert 1841ee5c2317SSteffen Klassert static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) 1842ee5c2317SSteffen Klassert { 1843ee5c2317SSteffen Klassert return kmemdup(orig, aead_len(orig), GFP_KERNEL); 1844ee5c2317SSteffen Klassert } 1845ee5c2317SSteffen Klassert 1846ee5c2317SSteffen Klassert 184780c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 184880c9abaaSShinta Sugimoto { 18490f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 185080c9abaaSShinta Sugimoto } 185180c9abaaSShinta Sugimoto 18524447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 18534447bb33SMartin Willi { 18544447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 18554447bb33SMartin Willi } 18564447bb33SMartin Willi 185780c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 185880c9abaaSShinta Sugimoto { 185980c9abaaSShinta Sugimoto int i; 186080c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 186180c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 186280c9abaaSShinta Sugimoto } 186380c9abaaSShinta Sugimoto 186480c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 186580c9abaaSShinta Sugimoto { 186680c9abaaSShinta Sugimoto int i; 186780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 186880c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 186980c9abaaSShinta Sugimoto } 187080c9abaaSShinta Sugimoto #endif 1871f8cd5488SJamal Hadi Salim 1872def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 187300501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 187400501121SHerbert Xu { 187500501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 187600501121SHerbert Xu } 187754ef207aSSteffen Klassert static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) 187854ef207aSSteffen Klassert { 187954ef207aSSteffen Klassert struct sec_path *sp = skb->sp; 188054ef207aSSteffen Klassert 188154ef207aSSteffen Klassert if (!sp || !sp->olen || sp->len != sp->olen) 188254ef207aSSteffen Klassert return NULL; 188354ef207aSSteffen Klassert 188454ef207aSSteffen Klassert return &sp->ovec[sp->olen - 1]; 188554ef207aSSteffen Klassert } 1886def8b4faSAlexey Dobriyan #endif 188700501121SHerbert Xu 1888d77e38e6SSteffen Klassert void __net_init xfrm_dev_init(void); 1889b81f884aSHangbin Liu 1890b81f884aSHangbin Liu #ifdef CONFIG_XFRM_OFFLOAD 18913dca3f38SSteffen Klassert struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features); 1892d77e38e6SSteffen Klassert int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, 1893d77e38e6SSteffen Klassert struct xfrm_user_offload *xuo); 1894d77e38e6SSteffen Klassert bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); 1895d77e38e6SSteffen Klassert 1896f70f250aSSteffen Klassert static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) 1897f70f250aSSteffen Klassert { 1898f70f250aSSteffen Klassert struct xfrm_state *x = dst->xfrm; 1899b6ca8bd5SDavid Miller struct xfrm_dst *xdst; 1900f70f250aSSteffen Klassert 1901f70f250aSSteffen Klassert if (!x || !x->type_offload) 1902f70f250aSSteffen Klassert return false; 1903f70f250aSSteffen Klassert 1904b6ca8bd5SDavid Miller xdst = (struct xfrm_dst *) dst; 19050f6c480fSDavid Miller if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) && 1906b6ca8bd5SDavid Miller !xdst->child->xfrm) 1907f70f250aSSteffen Klassert return true; 1908f70f250aSSteffen Klassert 1909f70f250aSSteffen Klassert return false; 1910f70f250aSSteffen Klassert } 1911f70f250aSSteffen Klassert 1912d77e38e6SSteffen Klassert static inline void xfrm_dev_state_delete(struct xfrm_state *x) 1913d77e38e6SSteffen Klassert { 1914d77e38e6SSteffen Klassert struct xfrm_state_offload *xso = &x->xso; 1915d77e38e6SSteffen Klassert 1916d77e38e6SSteffen Klassert if (xso->dev) 1917d77e38e6SSteffen Klassert xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); 1918d77e38e6SSteffen Klassert } 1919d77e38e6SSteffen Klassert 1920d77e38e6SSteffen Klassert static inline void xfrm_dev_state_free(struct xfrm_state *x) 1921d77e38e6SSteffen Klassert { 1922d77e38e6SSteffen Klassert struct xfrm_state_offload *xso = &x->xso; 1923d77e38e6SSteffen Klassert struct net_device *dev = xso->dev; 1924d77e38e6SSteffen Klassert 1925d77e38e6SSteffen Klassert if (dev && dev->xfrmdev_ops) { 1926d77e38e6SSteffen Klassert dev->xfrmdev_ops->xdo_dev_state_free(x); 1927d77e38e6SSteffen Klassert xso->dev = NULL; 1928d77e38e6SSteffen Klassert dev_put(dev); 1929d77e38e6SSteffen Klassert } 1930d77e38e6SSteffen Klassert } 1931d77e38e6SSteffen Klassert #else 19323dca3f38SSteffen Klassert static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features) 1933f6e27114SSteffen Klassert { 19343dca3f38SSteffen Klassert return skb; 1935f6e27114SSteffen Klassert } 1936f6e27114SSteffen Klassert 1937d77e38e6SSteffen Klassert static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo) 1938d77e38e6SSteffen Klassert { 1939d77e38e6SSteffen Klassert return 0; 1940d77e38e6SSteffen Klassert } 1941d77e38e6SSteffen Klassert 1942d77e38e6SSteffen Klassert static inline void xfrm_dev_state_delete(struct xfrm_state *x) 1943d77e38e6SSteffen Klassert { 1944d77e38e6SSteffen Klassert } 1945d77e38e6SSteffen Klassert 1946d77e38e6SSteffen Klassert static inline void xfrm_dev_state_free(struct xfrm_state *x) 1947d77e38e6SSteffen Klassert { 1948d77e38e6SSteffen Klassert } 1949d77e38e6SSteffen Klassert 1950d77e38e6SSteffen Klassert static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) 1951d77e38e6SSteffen Klassert { 1952d77e38e6SSteffen Klassert return false; 1953d77e38e6SSteffen Klassert } 1954f70f250aSSteffen Klassert 1955f70f250aSSteffen Klassert static inline bool xfrm_dst_offload_ok(struct dst_entry *dst) 1956f70f250aSSteffen Klassert { 1957f70f250aSSteffen Klassert return false; 1958f70f250aSSteffen Klassert } 1959d77e38e6SSteffen Klassert #endif 1960d77e38e6SSteffen Klassert 1961bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1962bf825f81SJamal Hadi Salim { 1963bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 19644efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1965bf825f81SJamal Hadi Salim else 1966bf825f81SJamal Hadi Salim m->v = m->m = 0; 1967bf825f81SJamal Hadi Salim 1968bf825f81SJamal Hadi Salim return m->v & m->m; 1969bf825f81SJamal Hadi Salim } 1970bf825f81SJamal Hadi Salim 1971e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1972bf825f81SJamal Hadi Salim { 19731d1e34ddSDavid S. Miller int ret = 0; 1974bf825f81SJamal Hadi Salim 19751d1e34ddSDavid S. Miller if (m->m | m->v) 19761d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 19771d1e34ddSDavid S. Miller return ret; 1978bf825f81SJamal Hadi Salim } 1979bf825f81SJamal Hadi Salim 198070be6c91SSteffen Klassert static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, 198170be6c91SSteffen Klassert unsigned int family) 198270be6c91SSteffen Klassert { 198370be6c91SSteffen Klassert bool tunnel = false; 198470be6c91SSteffen Klassert 198570be6c91SSteffen Klassert switch(family) { 198670be6c91SSteffen Klassert case AF_INET: 198770be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) 198870be6c91SSteffen Klassert tunnel = true; 198970be6c91SSteffen Klassert break; 199070be6c91SSteffen Klassert case AF_INET6: 199170be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) 199270be6c91SSteffen Klassert tunnel = true; 199370be6c91SSteffen Klassert break; 199470be6c91SSteffen Klassert } 199570be6c91SSteffen Klassert if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) 199670be6c91SSteffen Klassert return -EINVAL; 199770be6c91SSteffen Klassert 199870be6c91SSteffen Klassert return 0; 199970be6c91SSteffen Klassert } 20001da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 2001