11da177e4SLinus Torvalds #ifndef _NET_XFRM_H 21da177e4SLinus Torvalds #define _NET_XFRM_H 31da177e4SLinus Torvalds 4aabc9761SHerbert Xu #include <linux/compiler.h> 51da177e4SLinus Torvalds #include <linux/xfrm.h> 61da177e4SLinus Torvalds #include <linux/spinlock.h> 71da177e4SLinus Torvalds #include <linux/list.h> 81da177e4SLinus Torvalds #include <linux/skbuff.h> 914c85021SArnaldo Carvalho de Melo #include <linux/socket.h> 101da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 115794708fSMasahide NAKAMURA #include <linux/ipsec.h> 121da177e4SLinus Torvalds #include <linux/in6.h> 134a3e2f71SArjan van de Ven #include <linux/mutex.h> 14ab5f5e8bSJoy Latten #include <linux/audit.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <net/sock.h> 181da177e4SLinus Torvalds #include <net/dst.h> 19436a0a40SHerbert Xu #include <net/ip.h> 201da177e4SLinus Torvalds #include <net/route.h> 211da177e4SLinus Torvalds #include <net/ipv6.h> 221da177e4SLinus Torvalds #include <net/ip6_fib.h> 23fe1a5f03STimo Teräs #include <net/flow.h> 249e0d57fdSYury Polyanskiy 259e0d57fdSYury Polyanskiy #include <linux/interrupt.h> 269e0d57fdSYury Polyanskiy 27558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 28558f82efSMasahide NAKAMURA #include <net/snmp.h> 29558f82efSMasahide NAKAMURA #endif 301da177e4SLinus Torvalds 31d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 32d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 33d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 34d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 35d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 36d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 37d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 38d3d6dd3aSMasahide NAKAMURA 39fa9921e4SNicolas Dichtel #define XFRM_ALIGN4(len) (((len) + 3) & ~3) 401da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 41b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 42b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 43d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 44d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 451da177e4SLinus Torvalds 46558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 4759c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) 48558f82efSMasahide NAKAMURA #else 4959c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) ((void)(net)) 50558f82efSMasahide NAKAMURA #endif 51558f82efSMasahide NAKAMURA 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 541da177e4SLinus Torvalds ------------------------------------ 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds Basic objects: 571da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 581da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 591da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 601da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 631da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 641da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 651da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 701da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 711da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 721da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 731da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 741da177e4SLinus Torvalds to a dst_entry returned to requestor. 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 771da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 781da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 791da177e4SLinus Torvalds |---. child .-> NULL 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds Resolution of xrfm_tmpl 851da177e4SLinus Torvalds ----------------------- 861da177e4SLinus Torvalds Template contains: 871da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 881da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 891da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 901da177e4SLinus Torvalds Q: allow to resolve security gateway? 911da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 921da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 931da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 941da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 951da177e4SLinus Torvalds 7. ->share Sharing mode. 961da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 971da177e4SLinus Torvalds flow id? 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1001da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1011da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds PROBLEMS: 1041da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1051da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1061da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1071da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1081da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1091da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1101da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1111da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1121da177e4SLinus Torvalds */ 1131da177e4SLinus Torvalds 11412a169e7SHerbert Xu struct xfrm_state_walk { 11512a169e7SHerbert Xu struct list_head all; 11612a169e7SHerbert Xu u8 state; 11712a169e7SHerbert Xu u8 dying; 11812a169e7SHerbert Xu u8 proto; 11912a169e7SHerbert Xu u32 seq; 120870a2df4SNicolas Dichtel struct xfrm_address_filter *filter; 12112a169e7SHerbert Xu }; 12212a169e7SHerbert Xu 1231da177e4SLinus Torvalds /* Full description of state of transformer. */ 124fd2c3ef7SEric Dumazet struct xfrm_state { 1250c5c9fb5SEric W. Biederman possible_net_t xs_net; 126abb81c4fSHerbert Xu union { 12712a169e7SHerbert Xu struct hlist_node gclist; 1288f126e37SDavid S. Miller struct hlist_node bydst; 129abb81c4fSHerbert Xu }; 1308f126e37SDavid S. Miller struct hlist_node bysrc; 1318f126e37SDavid S. Miller struct hlist_node byspi; 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds atomic_t refcnt; 1341da177e4SLinus Torvalds spinlock_t lock; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds struct xfrm_id id; 1371da177e4SLinus Torvalds struct xfrm_selector sel; 138bf825f81SJamal Hadi Salim struct xfrm_mark mark; 13935d2856bSMartin Willi u32 tfcpad; 1401da177e4SLinus Torvalds 1419d4a706dSDavid S. Miller u32 genid; 1429d4a706dSDavid S. Miller 14312a169e7SHerbert Xu /* Key manager bits */ 14412a169e7SHerbert Xu struct xfrm_state_walk km; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds /* Parameters of this state. */ 1471da177e4SLinus Torvalds struct { 1481da177e4SLinus Torvalds u32 reqid; 1491da177e4SLinus Torvalds u8 mode; 1501da177e4SLinus Torvalds u8 replay_window; 1511da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1521da177e4SLinus Torvalds u8 flags; 1531da177e4SLinus Torvalds u16 family; 1541da177e4SLinus Torvalds xfrm_address_t saddr; 1551da177e4SLinus Torvalds int header_len; 1561da177e4SLinus Torvalds int trailer_len; 157a947b0a9SNicolas Dichtel u32 extra_flags; 1581da177e4SLinus Torvalds } props; 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* Data for transformer */ 1634447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1641da177e4SLinus Torvalds struct xfrm_algo *ealg; 1651da177e4SLinus Torvalds struct xfrm_algo *calg; 1661a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 16769b0137fSHerbert Xu const char *geniv; 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* Data for encapsulator */ 1701da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1711da177e4SLinus Torvalds 172060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 173060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 174060f02a3SNoriaki TAKAMIYA 1751da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1761da177e4SLinus Torvalds struct xfrm_state *tunnel; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1791da177e4SLinus Torvalds atomic_t tunnel_users; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds /* State for replay detection */ 1821da177e4SLinus Torvalds struct xfrm_replay_state replay; 1839736acf3SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 1841da177e4SLinus Torvalds 185f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 186f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 1879736acf3SSteffen Klassert struct xfrm_replay_state_esn *preplay_esn; 188f8cd5488SJamal Hadi Salim 1899fdc4883SSteffen Klassert /* The functions for replay detection. */ 190e45a8a9eSJulia Lawall const struct xfrm_replay *repl; 1919fdc4883SSteffen Klassert 1922717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1932717096aSJamal Hadi Salim * moment 1942717096aSJamal Hadi Salim */ 1952717096aSJamal Hadi Salim u32 xflags; 1962717096aSJamal Hadi Salim 197f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 198f8cd5488SJamal Hadi Salim u32 replay_maxage; 199f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 200f8cd5488SJamal Hadi Salim 201f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 202f8cd5488SJamal Hadi Salim struct timer_list rtimer; 203f8cd5488SJamal Hadi Salim 2041da177e4SLinus Torvalds /* Statistics */ 2051da177e4SLinus Torvalds struct xfrm_stats stats; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2089e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2091da177e4SLinus Torvalds 210e3c0d047SFan Du /* used to fix curlft->add_time when changing date */ 211e3c0d047SFan Du long saved_tmo; 212e3c0d047SFan Du 2139afaca05SMasahide NAKAMURA /* Last used time */ 214d26f3984SHerbert Xu unsigned long lastused; 2159afaca05SMasahide NAKAMURA 216cac2661cSSteffen Klassert struct page_frag xfrag; 217cac2661cSSteffen Klassert 2181da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2191da177e4SLinus Torvalds * transformer. */ 220533cb5b0SEric Dumazet const struct xfrm_type *type; 22113996378SHerbert Xu struct xfrm_mode *inner_mode; 222df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 22313996378SHerbert Xu struct xfrm_mode *outer_mode; 2241da177e4SLinus Torvalds 225df71837dSTrent Jaeger /* Security context */ 226df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 227df71837dSTrent Jaeger 2281da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2291da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2301da177e4SLinus Torvalds void *data; 2311da177e4SLinus Torvalds }; 2321da177e4SLinus Torvalds 233673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 234673c09beSAlexey Dobriyan { 235673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 236673c09beSAlexey Dobriyan } 237673c09beSAlexey Dobriyan 2382717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2392717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 240e3c0d047SFan Du #define XFRM_SOFT_EXPIRE 2 2412717096aSJamal Hadi Salim 2421da177e4SLinus Torvalds enum { 2431da177e4SLinus Torvalds XFRM_STATE_VOID, 2441da177e4SLinus Torvalds XFRM_STATE_ACQ, 2451da177e4SLinus Torvalds XFRM_STATE_VALID, 2461da177e4SLinus Torvalds XFRM_STATE_ERROR, 2471da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2481da177e4SLinus Torvalds XFRM_STATE_DEAD 2491da177e4SLinus Torvalds }; 2501da177e4SLinus Torvalds 25126b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 252fd2c3ef7SEric Dumazet struct km_event { 253bf08867fSHerbert Xu union { 254bf08867fSHerbert Xu u32 hard; 255bf08867fSHerbert Xu u32 proto; 256bf08867fSHerbert Xu u32 byid; 257f8cd5488SJamal Hadi Salim u32 aevent; 258f7b6983fSMasahide NAKAMURA u32 type; 259bf08867fSHerbert Xu } data; 260bf08867fSHerbert Xu 26126b15dadSJamal Hadi Salim u32 seq; 26215e47304SEric W. Biederman u32 portid; 26326b15dadSJamal Hadi Salim u32 event; 2647067802eSAlexey Dobriyan struct net *net; 26526b15dadSJamal Hadi Salim }; 26626b15dadSJamal Hadi Salim 2679fdc4883SSteffen Klassert struct xfrm_replay { 2689fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2699fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2709fdc4883SSteffen Klassert struct sk_buff *skb, 2719fdc4883SSteffen Klassert __be32 net_seq); 2723b59df46SSteffen Klassert int (*recheck)(struct xfrm_state *x, 2733b59df46SSteffen Klassert struct sk_buff *skb, 2743b59df46SSteffen Klassert __be32 net_seq); 2759fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2769fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2779fdc4883SSteffen Klassert }; 2789fdc4883SSteffen Klassert 27925ee3286SHerbert Xu struct net_device; 2801da177e4SLinus Torvalds struct xfrm_type; 2811da177e4SLinus Torvalds struct xfrm_dst; 2821da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2831da177e4SLinus Torvalds unsigned short family; 2841da177e4SLinus Torvalds struct dst_ops *dst_ops; 285ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 28642a7b32bSDavid Ahern struct dst_entry *(*dst_lookup)(struct net *net, 28742a7b32bSDavid Ahern int tos, int oif, 2885e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2895e6b930fSDavid S. Miller const xfrm_address_t *daddr); 29042a7b32bSDavid Ahern int (*get_saddr)(struct net *net, int oif, 29142a7b32bSDavid Ahern xfrm_address_t *saddr, 29242a7b32bSDavid Ahern xfrm_address_t *daddr); 2931da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 294d5422efeSHerbert Xu struct flowi *fl, 295d5422efeSHerbert Xu int reverse); 29605d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 297a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 298a1b05140SMasahide NAKAMURA struct dst_entry *dst, 299a1b05140SMasahide NAKAMURA int nfheader_len); 30025ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 30187c1e12bSHerbert Xu struct net_device *dev, 3020c7b3eefSDavid S. Miller const struct flowi *fl); 3032774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 3041da177e4SLinus Torvalds }; 3051da177e4SLinus Torvalds 306d511337aSJoe Perches int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 307d511337aSJoe Perches int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 308d511337aSJoe Perches void km_policy_notify(struct xfrm_policy *xp, int dir, 309d511337aSJoe Perches const struct km_event *c); 310d511337aSJoe Perches void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds struct xfrm_tmpl; 313d511337aSJoe Perches int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, 314d511337aSJoe Perches struct xfrm_policy *pol); 315d511337aSJoe Perches void km_state_expired(struct xfrm_state *x, int hard, u32 portid); 316d511337aSJoe Perches int __xfrm_state_delete(struct xfrm_state *x); 31753bc6b4dSJamal Hadi Salim 3181da177e4SLinus Torvalds struct xfrm_state_afinfo { 31917c2a42aSHerbert Xu unsigned int family; 32036cf9acfSHerbert Xu unsigned int proto; 3218e3d716cSAl Viro __be16 eth_proto; 32217c2a42aSHerbert Xu struct module *owner; 323533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 324aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 325d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 32673e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 32773e5ebb2SDavid S. Miller const struct flowi *fl); 32819bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 32919bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 33019bd6244SDavid S. Miller const xfrm_address_t *daddr, 33119bd6244SDavid S. Miller const xfrm_address_t *saddr); 33241a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 33341a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 334ede2059dSEric W. Biederman int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); 3357026b1ddSDavid Miller int (*output_finish)(struct sock *sk, struct sk_buff *skb); 336227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 337227620e2SHerbert Xu struct sk_buff *skb); 33836cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 33936cf9acfSHerbert Xu struct sk_buff *skb); 340716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 341716062fdSHerbert Xu int async); 342628e341fSHannes Frederic Sowa void (*local_error)(struct sk_buff *skb, u32 mtu); 3431da177e4SLinus Torvalds }; 3441da177e4SLinus Torvalds 345d511337aSJoe Perches int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 346d511337aSJoe Perches int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 347d511337aSJoe Perches struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); 348711059b9SFlorian Westphal struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); 3491da177e4SLinus Torvalds 3502f32b51bSSteffen Klassert struct xfrm_input_afinfo { 3512f32b51bSSteffen Klassert unsigned int family; 3522f32b51bSSteffen Klassert int (*callback)(struct sk_buff *skb, u8 protocol, 3532f32b51bSSteffen Klassert int err); 3542f32b51bSSteffen Klassert }; 3552f32b51bSSteffen Klassert 356960fdfdeSFlorian Westphal int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); 357960fdfdeSFlorian Westphal int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); 3582f32b51bSSteffen Klassert 359d511337aSJoe Perches void xfrm_state_delete_tunnel(struct xfrm_state *x); 3601da177e4SLinus Torvalds 361fd2c3ef7SEric Dumazet struct xfrm_type { 3621da177e4SLinus Torvalds char *description; 3631da177e4SLinus Torvalds struct module *owner; 364a6337463Sjamal u8 proto; 365a6337463Sjamal u8 flags; 3661b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 367436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 368f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 369f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3701da177e4SLinus Torvalds 37172cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3721da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 373e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3741da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3758f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3768f029de2SDavid S. Miller const struct flowi *); 377aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3781da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 379c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3801da177e4SLinus Torvalds }; 3811da177e4SLinus Torvalds 382d511337aSJoe Perches int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 383d511337aSJoe Perches int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3841da177e4SLinus Torvalds 385b59f45d0SHerbert Xu struct xfrm_mode { 386227620e2SHerbert Xu /* 387227620e2SHerbert Xu * Remove encapsulation header. 388227620e2SHerbert Xu * 389227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 390227620e2SHerbert Xu * header. 391227620e2SHerbert Xu * 392227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 393227620e2SHerbert Xu * should be and the network header shall be set to where the IP 394227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 395227620e2SHerbert Xu * payload. 396227620e2SHerbert Xu */ 397227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 398227620e2SHerbert Xu 399227620e2SHerbert Xu /* 400227620e2SHerbert Xu * This is the actual input entry point. 401227620e2SHerbert Xu * 402227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 403227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 404227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 405227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 406227620e2SHerbert Xu */ 407b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 40837fedd3aSHerbert Xu 40937fedd3aSHerbert Xu /* 41037fedd3aSHerbert Xu * Add encapsulation header. 41137fedd3aSHerbert Xu * 41237fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 41337fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 41437fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 41537fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 41637fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 41737fedd3aSHerbert Xu * header. The value of the network header will always point 41837fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 41937fedd3aSHerbert Xu */ 42036cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 42136cf9acfSHerbert Xu 42236cf9acfSHerbert Xu /* 42336cf9acfSHerbert Xu * This is the actual output entry point. 42436cf9acfSHerbert Xu * 42536cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 42636cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 42736cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 42836cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 42936cf9acfSHerbert Xu * call output2. 43036cf9acfSHerbert Xu */ 431eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 432b59f45d0SHerbert Xu 43317c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 434b59f45d0SHerbert Xu struct module *owner; 435b59f45d0SHerbert Xu unsigned int encap; 4361bfcb10fSHerbert Xu int flags; 4371bfcb10fSHerbert Xu }; 4381bfcb10fSHerbert Xu 4391bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4401bfcb10fSHerbert Xu enum { 4411bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 442b59f45d0SHerbert Xu }; 443b59f45d0SHerbert Xu 444d511337aSJoe Perches int xfrm_register_mode(struct xfrm_mode *mode, int family); 445d511337aSJoe Perches int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 446b59f45d0SHerbert Xu 447df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 448df9dcb45SKazunori MIYAZAWA { 449df9dcb45SKazunori MIYAZAWA switch(family) { 450df9dcb45SKazunori MIYAZAWA case AF_INET: 451df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 452df9dcb45SKazunori MIYAZAWA case AF_INET6: 453df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 454df9dcb45SKazunori MIYAZAWA default: 455df9dcb45SKazunori MIYAZAWA return 0; 456df9dcb45SKazunori MIYAZAWA } 457df9dcb45SKazunori MIYAZAWA } 458df9dcb45SKazunori MIYAZAWA 459df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 460df9dcb45SKazunori MIYAZAWA { 461df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 462df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 463df9dcb45SKazunori MIYAZAWA return x->inner_mode; 464df9dcb45SKazunori MIYAZAWA else 465df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 466df9dcb45SKazunori MIYAZAWA } 467df9dcb45SKazunori MIYAZAWA 468fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4691da177e4SLinus Torvalds /* id in template is interpreted as: 4701da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4711da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4721da177e4SLinus Torvalds * daddr must be fixed too. 4731da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4741da177e4SLinus Torvalds */ 4751da177e4SLinus Torvalds struct xfrm_id id; 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4781da177e4SLinus Torvalds xfrm_address_t saddr; 4791da177e4SLinus Torvalds 48076b3f055SMiika Komu unsigned short encap_family; 48176b3f055SMiika Komu 482a6337463Sjamal u32 reqid; 4831da177e4SLinus Torvalds 4847e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 485a6337463Sjamal u8 mode; 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 488a6337463Sjamal u8 share; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 491a6337463Sjamal u8 optional; 4921da177e4SLinus Torvalds 493c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 494a6337463Sjamal u8 allalgs; 495c5d18e98SHerbert Xu 4961da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 497a6337463Sjamal u32 aalgos; 498a6337463Sjamal u32 ealgos; 499a6337463Sjamal u32 calgos; 5001da177e4SLinus Torvalds }; 5011da177e4SLinus Torvalds 502622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 5031da177e4SLinus Torvalds 50412a169e7SHerbert Xu struct xfrm_policy_walk_entry { 50512a169e7SHerbert Xu struct list_head all; 50612a169e7SHerbert Xu u8 dead; 50712a169e7SHerbert Xu }; 50812a169e7SHerbert Xu 50912a169e7SHerbert Xu struct xfrm_policy_walk { 51012a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 51112a169e7SHerbert Xu u8 type; 51212a169e7SHerbert Xu u32 seq; 51312a169e7SHerbert Xu }; 51412a169e7SHerbert Xu 515a0073fe1SSteffen Klassert struct xfrm_policy_queue { 516a0073fe1SSteffen Klassert struct sk_buff_head hold_queue; 517a0073fe1SSteffen Klassert struct timer_list hold_timer; 518a0073fe1SSteffen Klassert unsigned long timeout; 519a0073fe1SSteffen Klassert }; 520a0073fe1SSteffen Klassert 521fd2c3ef7SEric Dumazet struct xfrm_policy { 5220c5c9fb5SEric W. Biederman possible_net_t xp_net; 5232518c7c2SDavid S. Miller struct hlist_node bydst; 5242518c7c2SDavid S. Miller struct hlist_node byidx; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5271da177e4SLinus Torvalds rwlock_t lock; 5281da177e4SLinus Torvalds atomic_t refcnt; 5291da177e4SLinus Torvalds struct timer_list timer; 5301da177e4SLinus Torvalds 531fe1a5f03STimo Teräs struct flow_cache_object flo; 53280c802f3STimo Teräs atomic_t genid; 5331da177e4SLinus Torvalds u32 priority; 5341da177e4SLinus Torvalds u32 index; 535bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5361da177e4SLinus Torvalds struct xfrm_selector selector; 5371da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5381da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 53912a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 540a0073fe1SSteffen Klassert struct xfrm_policy_queue polq; 54146ca5f5dSArnaldo Carvalho de Melo u8 type; 54246ca5f5dSArnaldo Carvalho de Melo u8 action; 54346ca5f5dSArnaldo Carvalho de Melo u8 flags; 54446ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 54512a169e7SHerbert Xu u16 family; 546df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5471da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 54856f04730SEric Dumazet struct rcu_head rcu; 5491da177e4SLinus Torvalds }; 5501da177e4SLinus Torvalds 55163eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5520331b1f3SAlexey Dobriyan { 5530331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5540331b1f3SAlexey Dobriyan } 5550331b1f3SAlexey Dobriyan 55613c1d189SArnaud Ebalard struct xfrm_kmaddress { 55713c1d189SArnaud Ebalard xfrm_address_t local; 55813c1d189SArnaud Ebalard xfrm_address_t remote; 55913c1d189SArnaud Ebalard u32 reserved; 56013c1d189SArnaud Ebalard u16 family; 56113c1d189SArnaud Ebalard }; 56213c1d189SArnaud Ebalard 56380c9abaaSShinta Sugimoto struct xfrm_migrate { 56480c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 56580c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 56680c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 56780c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 56880c9abaaSShinta Sugimoto u8 proto; 56980c9abaaSShinta Sugimoto u8 mode; 57080c9abaaSShinta Sugimoto u16 reserved; 57180c9abaaSShinta Sugimoto u32 reqid; 57280c9abaaSShinta Sugimoto u16 old_family; 57380c9abaaSShinta Sugimoto u16 new_family; 57480c9abaaSShinta Sugimoto }; 57580c9abaaSShinta Sugimoto 5761da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 577f8cd5488SJamal Hadi Salim /* what happened */ 578f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 579f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 580f8cd5488SJamal Hadi Salim 581f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 582f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 583f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 584f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 585f8cd5488SJamal Hadi Salim /* default seq threshold size */ 586f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5871da177e4SLinus Torvalds 588fd2c3ef7SEric Dumazet struct xfrm_mgr { 5891da177e4SLinus Torvalds struct list_head list; 5901da177e4SLinus Torvalds char *id; 591214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 59265e0736bSFan Du int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); 593cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5945d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 595214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 596db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 597183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 598183cad12SDavid S. Miller u8 dir, u8 type, 599183cad12SDavid S. Miller const struct xfrm_migrate *m, 600183cad12SDavid S. Miller int num_bundles, 601183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 6020f24558eSHoria Geanta bool (*is_alive)(const struct km_event *c); 6031da177e4SLinus Torvalds }; 6041da177e4SLinus Torvalds 605d511337aSJoe Perches int xfrm_register_km(struct xfrm_mgr *km); 606d511337aSJoe Perches int xfrm_unregister_km(struct xfrm_mgr *km); 6071da177e4SLinus Torvalds 60870be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb { 60970be6c91SSteffen Klassert union { 61070be6c91SSteffen Klassert struct inet_skb_parm h4; 61170be6c91SSteffen Klassert struct inet6_skb_parm h6; 61270be6c91SSteffen Klassert } header; 61370be6c91SSteffen Klassert 61470be6c91SSteffen Klassert union { 61570be6c91SSteffen Klassert struct ip_tunnel *ip4; 61670be6c91SSteffen Klassert struct ip6_tnl *ip6; 61770be6c91SSteffen Klassert } tunnel; 61870be6c91SSteffen Klassert }; 61970be6c91SSteffen Klassert 62070be6c91SSteffen Klassert #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) 62170be6c91SSteffen Klassert 622436a0a40SHerbert Xu /* 623436a0a40SHerbert Xu * This structure is used for the duration where packets are being 624436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 625436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 626436a0a40SHerbert Xu */ 627436a0a40SHerbert Xu struct xfrm_skb_cb { 62870be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 629436a0a40SHerbert Xu 630436a0a40SHerbert Xu /* Sequence number for replay protection. */ 631b318e0e4SHerbert Xu union { 6321ce3644aSSteffen Klassert struct { 6331ce3644aSSteffen Klassert __u32 low; 6341ce3644aSSteffen Klassert __u32 hi; 6351ce3644aSSteffen Klassert } output; 6361ce3644aSSteffen Klassert struct { 6371ce3644aSSteffen Klassert __be32 low; 6381ce3644aSSteffen Klassert __be32 hi; 6391ce3644aSSteffen Klassert } input; 640b318e0e4SHerbert Xu } seq; 641436a0a40SHerbert Xu }; 642436a0a40SHerbert Xu 643436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 644436a0a40SHerbert Xu 64536cf9acfSHerbert Xu /* 64636cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 64736cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 64836cf9acfSHerbert Xu */ 64936cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 65070be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 65136cf9acfSHerbert Xu 65236cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 65336cf9acfSHerbert Xu __be16 id; 65436cf9acfSHerbert Xu __be16 frag_off; 65536cf9acfSHerbert Xu 656732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 657732c8bd5SHerbert Xu u8 ihl; 658732c8bd5SHerbert Xu 65936cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 66036cf9acfSHerbert Xu u8 tos; 66136cf9acfSHerbert Xu 66236cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 66336cf9acfSHerbert Xu u8 ttl; 66436cf9acfSHerbert Xu 66536cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 66636cf9acfSHerbert Xu u8 protocol; 66736cf9acfSHerbert Xu 668732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 669732c8bd5SHerbert Xu u8 optlen; 670732c8bd5SHerbert Xu 67136cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 67236cf9acfSHerbert Xu u8 flow_lbl[3]; 67336cf9acfSHerbert Xu }; 67436cf9acfSHerbert Xu 67536cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 67636cf9acfSHerbert Xu 677716062fdSHerbert Xu /* 678716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 679716062fdSHerbert Xu * related information. 680716062fdSHerbert Xu */ 681716062fdSHerbert Xu struct xfrm_spi_skb_cb { 68270be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 683716062fdSHerbert Xu 684716062fdSHerbert Xu unsigned int daddroff; 6852fcb45b6SHerbert Xu unsigned int family; 686716062fdSHerbert Xu }; 687716062fdSHerbert Xu 688716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 689716062fdSHerbert Xu 690c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 691afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 692ab5f5e8bSJoy Latten { 693ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 694ab5f5e8bSJoy Latten 695afeb14b4SPaul Moore if (audit_enabled == 0) 696afeb14b4SPaul Moore return NULL; 697ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 698ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 699ab5f5e8bSJoy Latten if (audit_buf == NULL) 700ab5f5e8bSJoy Latten return NULL; 701afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 702afeb14b4SPaul Moore return audit_buf; 703afeb14b4SPaul Moore } 704afeb14b4SPaul Moore 7052e71029eSTetsuo Handa static inline void xfrm_audit_helper_usrinfo(bool task_valid, 706afeb14b4SPaul Moore struct audit_buffer *audit_buf) 707afeb14b4SPaul Moore { 7082e71029eSTetsuo Handa const unsigned int auid = from_kuid(&init_user_ns, task_valid ? 7092e71029eSTetsuo Handa audit_get_loginuid(current) : 7102e71029eSTetsuo Handa INVALID_UID); 7112e71029eSTetsuo Handa const unsigned int ses = task_valid ? audit_get_sessionid(current) : 7122e71029eSTetsuo Handa (unsigned int) -1; 7132e71029eSTetsuo Handa 7142e71029eSTetsuo Handa audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 715ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 716ab5f5e8bSJoy Latten } 717ab5f5e8bSJoy Latten 7182e71029eSTetsuo Handa void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); 7192e71029eSTetsuo Handa void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7202e71029eSTetsuo Handa bool task_valid); 7212e71029eSTetsuo Handa void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); 7222e71029eSTetsuo Handa void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); 723d511337aSJoe Perches void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 724afeb14b4SPaul Moore struct sk_buff *skb); 725d511337aSJoe Perches void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, 726d511337aSJoe Perches __be32 net_seq); 727d511337aSJoe Perches void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 728d511337aSJoe Perches void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, 729d511337aSJoe Perches __be32 net_seq); 730d511337aSJoe Perches void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, 731d511337aSJoe Perches u8 proto); 732c9204d9cSJoy Latten #else 73341fef0eeSMarcin Slusarz 73441fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7352e71029eSTetsuo Handa bool task_valid) 73641fef0eeSMarcin Slusarz { 73741fef0eeSMarcin Slusarz } 73841fef0eeSMarcin Slusarz 73941fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7402e71029eSTetsuo Handa bool task_valid) 74141fef0eeSMarcin Slusarz { 74241fef0eeSMarcin Slusarz } 74341fef0eeSMarcin Slusarz 74441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 7452e71029eSTetsuo Handa bool task_valid) 74641fef0eeSMarcin Slusarz { 74741fef0eeSMarcin Slusarz } 74841fef0eeSMarcin Slusarz 74941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7502e71029eSTetsuo Handa bool task_valid) 75141fef0eeSMarcin Slusarz { 75241fef0eeSMarcin Slusarz } 75341fef0eeSMarcin Slusarz 75441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 75541fef0eeSMarcin Slusarz struct sk_buff *skb) 75641fef0eeSMarcin Slusarz { 75741fef0eeSMarcin Slusarz } 75841fef0eeSMarcin Slusarz 7599fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7609fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7619fdc4883SSteffen Klassert { 7629fdc4883SSteffen Klassert } 7639fdc4883SSteffen Klassert 76441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 76541fef0eeSMarcin Slusarz u16 family) 76641fef0eeSMarcin Slusarz { 76741fef0eeSMarcin Slusarz } 76841fef0eeSMarcin Slusarz 76941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 77041fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 77141fef0eeSMarcin Slusarz { 77241fef0eeSMarcin Slusarz } 77341fef0eeSMarcin Slusarz 77441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 77541fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 77641fef0eeSMarcin Slusarz { 77741fef0eeSMarcin Slusarz } 778c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 779161a09e7SJoy Latten 7801da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7811da177e4SLinus Torvalds { 7821da177e4SLinus Torvalds if (likely(policy != NULL)) 7831da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7841da177e4SLinus Torvalds } 7851da177e4SLinus Torvalds 786d511337aSJoe Perches void xfrm_policy_destroy(struct xfrm_policy *policy); 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7891da177e4SLinus Torvalds { 7901da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 79164c31b3fSWANG Cong xfrm_policy_destroy(policy); 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 7944e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7954e81bb83SMasahide NAKAMURA { 7964e81bb83SMasahide NAKAMURA int i; 7974e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7984e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7994e81bb83SMasahide NAKAMURA } 8004e81bb83SMasahide NAKAMURA 801d511337aSJoe Perches void __xfrm_state_destroy(struct xfrm_state *); 8021da177e4SLinus Torvalds 80321380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 80421380b81SHerbert Xu { 80521380b81SHerbert Xu atomic_dec(&x->refcnt); 80621380b81SHerbert Xu } 80721380b81SHerbert Xu 8081da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 8091da177e4SLinus Torvalds { 8101da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 8111da177e4SLinus Torvalds __xfrm_state_destroy(x); 8121da177e4SLinus Torvalds } 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8151da177e4SLinus Torvalds { 8161da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds 8191744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8201744a8feSDavid S. Miller int prefixlen) 8211da177e4SLinus Torvalds { 8221744a8feSDavid S. Miller const __be32 *a1 = token1; 8231744a8feSDavid S. Miller const __be32 *a2 = token2; 8241da177e4SLinus Torvalds int pdw; 8251da177e4SLinus Torvalds int pbi; 8261da177e4SLinus Torvalds 827a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8281da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds if (pdw) 8311da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8321744a8feSDavid S. Miller return false; 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds if (pbi) { 8355f19343fSAl Viro __be32 mask; 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8401744a8feSDavid S. Miller return false; 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds 8431744a8feSDavid S. Miller return true; 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds 84626bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 84726bff940SAlexey Dobriyan { 84826bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 84926bff940SAlexey Dobriyan if (prefixlen == 0) 85026bff940SAlexey Dobriyan return true; 85126bff940SAlexey Dobriyan return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); 85226bff940SAlexey Dobriyan } 85326bff940SAlexey Dobriyan 8541da177e4SLinus Torvalds static __inline__ 8556281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8561da177e4SLinus Torvalds { 857f9d07e41SAl Viro __be16 port; 8581d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8591da177e4SLinus Torvalds case IPPROTO_TCP: 8601da177e4SLinus Torvalds case IPPROTO_UDP: 861ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8621da177e4SLinus Torvalds case IPPROTO_SCTP: 8636281dcc9SDavid S. Miller port = uli->ports.sport; 8641da177e4SLinus Torvalds break; 8651da177e4SLinus Torvalds case IPPROTO_ICMP: 8661da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8676281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8681da177e4SLinus Torvalds break; 8692ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8706281dcc9SDavid S. Miller port = htons(uli->mht.type); 8712ce4272aSMasahide NAKAMURA break; 872cc9ff19dSTimo Teräs case IPPROTO_GRE: 8736281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 874cc9ff19dSTimo Teräs break; 8751da177e4SLinus Torvalds default: 8761da177e4SLinus Torvalds port = 0; /*XXX*/ 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds return port; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds static __inline__ 8826281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8831da177e4SLinus Torvalds { 884f9d07e41SAl Viro __be16 port; 8851d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8861da177e4SLinus Torvalds case IPPROTO_TCP: 8871da177e4SLinus Torvalds case IPPROTO_UDP: 888ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8891da177e4SLinus Torvalds case IPPROTO_SCTP: 8906281dcc9SDavid S. Miller port = uli->ports.dport; 8911da177e4SLinus Torvalds break; 8921da177e4SLinus Torvalds case IPPROTO_ICMP: 8931da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8946281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8951da177e4SLinus Torvalds break; 896cc9ff19dSTimo Teräs case IPPROTO_GRE: 8976281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 898cc9ff19dSTimo Teräs break; 8991da177e4SLinus Torvalds default: 9001da177e4SLinus Torvalds port = 0; /*XXX*/ 9011da177e4SLinus Torvalds } 9021da177e4SLinus Torvalds return port; 9031da177e4SLinus Torvalds } 9041da177e4SLinus Torvalds 905d511337aSJoe Perches bool xfrm_selector_match(const struct xfrm_selector *sel, 906d511337aSJoe Perches const struct flowi *fl, unsigned short family); 9071da177e4SLinus Torvalds 908df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 909df71837dSTrent Jaeger /* If neither has a context --> match 910df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 911df71837dSTrent Jaeger */ 912bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 913df71837dSTrent Jaeger { 914df71837dSTrent Jaeger return ((!s1 && !s2) || 915df71837dSTrent Jaeger (s1 && s2 && 916df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 917df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 918df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 919df71837dSTrent Jaeger } 920df71837dSTrent Jaeger #else 921bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 922df71837dSTrent Jaeger { 923bc9b35adSDavid S. Miller return true; 924df71837dSTrent Jaeger } 925df71837dSTrent Jaeger #endif 926df71837dSTrent Jaeger 9271da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9281da177e4SLinus Torvalds * 9291da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9301da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9311da177e4SLinus Torvalds * 9321da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9331da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9341da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9351da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9361da177e4SLinus Torvalds * policy rule. 9371da177e4SLinus Torvalds */ 938fd2c3ef7SEric Dumazet struct xfrm_dst { 9391da177e4SLinus Torvalds union { 9401da177e4SLinus Torvalds struct dst_entry dst; 9411da177e4SLinus Torvalds struct rtable rt; 9421da177e4SLinus Torvalds struct rt6_info rt6; 9431da177e4SLinus Torvalds } u; 9441da177e4SLinus Torvalds struct dst_entry *route; 94580c802f3STimo Teräs struct flow_cache_object flo; 94680c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 94780c802f3STimo Teräs int num_pols, num_xfrms; 948157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 949157bfc25SMasahide NAKAMURA struct flowi *origin; 950157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 951157bfc25SMasahide NAKAMURA #endif 95280c802f3STimo Teräs u32 xfrm_genid; 95380c802f3STimo Teräs u32 policy_genid; 9541da177e4SLinus Torvalds u32 route_mtu_cached; 9551da177e4SLinus Torvalds u32 child_mtu_cached; 95692d63decSHideaki YOSHIFUJI u32 route_cookie; 95792d63decSHideaki YOSHIFUJI u32 path_cookie; 9581da177e4SLinus Torvalds }; 9591da177e4SLinus Torvalds 960def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 961aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 962aabc9761SHerbert Xu { 96380c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 964aabc9761SHerbert Xu dst_release(xdst->route); 965aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 966aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 967157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 968157bfc25SMasahide NAKAMURA kfree(xdst->origin); 969157bfc25SMasahide NAKAMURA xdst->origin = NULL; 970157bfc25SMasahide NAKAMURA kfree(xdst->partner); 971157bfc25SMasahide NAKAMURA xdst->partner = NULL; 972157bfc25SMasahide NAKAMURA #endif 973aabc9761SHerbert Xu } 974def8b4faSAlexey Dobriyan #endif 975aabc9761SHerbert Xu 976d511337aSJoe Perches void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 977aabc9761SHerbert Xu 978fd2c3ef7SEric Dumazet struct sec_path { 9791da177e4SLinus Torvalds atomic_t refcnt; 9801da177e4SLinus Torvalds int len; 981dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9821da177e4SLinus Torvalds }; 9831da177e4SLinus Torvalds 984990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 985990078afSMichael Smith { 986990078afSMichael Smith #ifdef CONFIG_XFRM 987990078afSMichael Smith return skb->sp != NULL; 988990078afSMichael Smith #else 989990078afSMichael Smith return 0; 990990078afSMichael Smith #endif 991990078afSMichael Smith } 992990078afSMichael Smith 9931da177e4SLinus Torvalds static inline struct sec_path * 9941da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9951da177e4SLinus Torvalds { 9961da177e4SLinus Torvalds if (sp) 9971da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9981da177e4SLinus Torvalds return sp; 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds 1001d511337aSJoe Perches void __secpath_destroy(struct sec_path *sp); 10021da177e4SLinus Torvalds 10031da177e4SLinus Torvalds static inline void 10041da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 10051da177e4SLinus Torvalds { 10061da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 10071da177e4SLinus Torvalds __secpath_destroy(sp); 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 1010d511337aSJoe Perches struct sec_path *secpath_dup(struct sec_path *src); 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds static inline void 10131da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 10141da177e4SLinus Torvalds { 10151da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10161da177e4SLinus Torvalds secpath_put(skb->sp); 10171da177e4SLinus Torvalds skb->sp = NULL; 10181da177e4SLinus Torvalds #endif 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds static inline int 10226cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1023a1e59abfSPatrick McHardy { 1024a1e59abfSPatrick McHardy switch (family) { 1025a1e59abfSPatrick McHardy case AF_INET: 1026a1e59abfSPatrick McHardy return addr->a4 == 0; 1027a1e59abfSPatrick McHardy case AF_INET6: 102815e318bdSJiri Benc return ipv6_addr_any(&addr->in6); 1029a1e59abfSPatrick McHardy } 1030a1e59abfSPatrick McHardy return 0; 1031a1e59abfSPatrick McHardy } 1032a1e59abfSPatrick McHardy 1033a1e59abfSPatrick McHardy static inline int 103421eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10351da177e4SLinus Torvalds { 10361da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10371da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10381da177e4SLinus Torvalds } 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds static inline int 104121eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10421da177e4SLinus Torvalds { 10431da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 1044ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10451da177e4SLinus Torvalds } 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds static inline int 104821eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10491da177e4SLinus Torvalds { 10501da177e4SLinus Torvalds switch (family) { 10511da177e4SLinus Torvalds case AF_INET: 10521da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10531da177e4SLinus Torvalds case AF_INET6: 10541da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10551da177e4SLinus Torvalds } 10561da177e4SLinus Torvalds return !0; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1060d511337aSJoe Perches int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, 1061d511337aSJoe Perches unsigned short family); 10621da177e4SLinus Torvalds 1063d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1064d5422efeSHerbert Xu struct sk_buff *skb, 1065d5422efeSHerbert Xu unsigned int family, int reverse) 10661da177e4SLinus Torvalds { 1067f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1068d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1069d5422efeSHerbert Xu 10701da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1071d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10721da177e4SLinus Torvalds 1073f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1074adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1075d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1076d5422efeSHerbert Xu } 1077d5422efeSHerbert Xu 1078d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1079d5422efeSHerbert Xu { 1080d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10841da177e4SLinus Torvalds { 10851da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds 10881da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10891da177e4SLinus Torvalds { 10901da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10911da177e4SLinus Torvalds } 10921da177e4SLinus Torvalds 1093d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1094d5422efeSHerbert Xu struct sk_buff *skb) 1095d5422efeSHerbert Xu { 1096d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1097d5422efeSHerbert Xu } 1098d5422efeSHerbert Xu 1099d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1100d5422efeSHerbert Xu struct sk_buff *skb) 1101d5422efeSHerbert Xu { 1102d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1103d5422efeSHerbert Xu } 1104d5422efeSHerbert Xu 1105d511337aSJoe Perches int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1106d5422efeSHerbert Xu unsigned int family, int reverse); 1107d5422efeSHerbert Xu 1108d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1109d5422efeSHerbert Xu unsigned int family) 1110d5422efeSHerbert Xu { 1111d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1112d5422efeSHerbert Xu } 1113d5422efeSHerbert Xu 1114d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1115d5422efeSHerbert Xu struct flowi *fl, 1116d5422efeSHerbert Xu unsigned int family) 1117d5422efeSHerbert Xu { 1118d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1119d5422efeSHerbert Xu } 1120d5422efeSHerbert Xu 1121d511337aSJoe Perches int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 11241da177e4SLinus Torvalds { 112599a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 112699a66657SAlexey Dobriyan 112799a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1128adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11291da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11351da177e4SLinus Torvalds } 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11381da177e4SLinus Torvalds { 11391da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds 1142d188ba86SEric Dumazet int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); 11431da177e4SLinus Torvalds 1144d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) 11451da177e4SLinus Torvalds { 1146d188ba86SEric Dumazet sk->sk_policy[0] = NULL; 1147d188ba86SEric Dumazet sk->sk_policy[1] = NULL; 1148d188ba86SEric Dumazet if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) 1149d188ba86SEric Dumazet return __xfrm_sk_clone_policy(sk, osk); 11501da177e4SLinus Torvalds return 0; 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 1153d511337aSJoe Perches int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11541da177e4SLinus Torvalds 11551da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11561da177e4SLinus Torvalds { 1157d188ba86SEric Dumazet struct xfrm_policy *pol; 1158d188ba86SEric Dumazet 1159d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[0], 1); 1160d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1161d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX); 11621da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11631da177e4SLinus Torvalds } 1164d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[1], 1); 1165d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1166d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); 11671da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 1171d511337aSJoe Perches void xfrm_garbage_collect(struct net *net); 1172e4c17216SPaul Moore 11731da177e4SLinus Torvalds #else 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 1176d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } 11771da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11781da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11791da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11801da177e4SLinus Torvalds { 11811da177e4SLinus Torvalds return 1; 11821da177e4SLinus Torvalds } 11831da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11841da177e4SLinus Torvalds { 11851da177e4SLinus Torvalds return 1; 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11881da177e4SLinus Torvalds { 11891da177e4SLinus Torvalds return 1; 11901da177e4SLinus Torvalds } 1191d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1192d5422efeSHerbert Xu struct flowi *fl, 1193d5422efeSHerbert Xu unsigned int family) 1194d5422efeSHerbert Xu { 1195d5422efeSHerbert Xu return -ENOSYS; 1196d5422efeSHerbert Xu } 1197d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1198d5422efeSHerbert Xu struct sk_buff *skb) 1199d5422efeSHerbert Xu { 1200d5422efeSHerbert Xu return 1; 1201d5422efeSHerbert Xu } 1202d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1203d5422efeSHerbert Xu struct sk_buff *skb) 1204d5422efeSHerbert Xu { 1205d5422efeSHerbert Xu return 1; 1206d5422efeSHerbert Xu } 1207e4c17216SPaul Moore static inline void xfrm_garbage_collect(struct net *net) 1208e4c17216SPaul Moore { 1209e4c17216SPaul Moore } 12101da177e4SLinus Torvalds #endif 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds static __inline__ 1213e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 12141da177e4SLinus Torvalds { 12151da177e4SLinus Torvalds switch (family){ 12161da177e4SLinus Torvalds case AF_INET: 12177e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 12181da177e4SLinus Torvalds case AF_INET6: 12197e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 12201da177e4SLinus Torvalds } 12211da177e4SLinus Torvalds return NULL; 12221da177e4SLinus Torvalds } 12231da177e4SLinus Torvalds 12241da177e4SLinus Torvalds static __inline__ 1225e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 12261da177e4SLinus Torvalds { 12271da177e4SLinus Torvalds switch (family){ 12281da177e4SLinus Torvalds case AF_INET: 12297e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 12301da177e4SLinus Torvalds case AF_INET6: 12317e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 12321da177e4SLinus Torvalds } 12331da177e4SLinus Torvalds return NULL; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 12369bb182a7SYOSHIFUJI Hideaki static __inline__ 1237e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12389bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12399bb182a7SYOSHIFUJI Hideaki unsigned short family) 12409bb182a7SYOSHIFUJI Hideaki { 12419bb182a7SYOSHIFUJI Hideaki switch(family) { 12429bb182a7SYOSHIFUJI Hideaki case AF_INET: 12437e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12447e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12459bb182a7SYOSHIFUJI Hideaki break; 12469bb182a7SYOSHIFUJI Hideaki case AF_INET6: 124715e318bdSJiri Benc saddr->in6 = fl->u.ip6.saddr; 124815e318bdSJiri Benc daddr->in6 = fl->u.ip6.daddr; 12499bb182a7SYOSHIFUJI Hideaki break; 12509bb182a7SYOSHIFUJI Hideaki } 12519bb182a7SYOSHIFUJI Hideaki } 12529bb182a7SYOSHIFUJI Hideaki 12531da177e4SLinus Torvalds static __inline__ int 1254f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1255f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12561da177e4SLinus Torvalds { 12571da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12581da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12591da177e4SLinus Torvalds return 1; 12601da177e4SLinus Torvalds return 0; 12611da177e4SLinus Torvalds } 12621da177e4SLinus Torvalds 12631da177e4SLinus Torvalds static __inline__ int 1264f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1265f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12661da177e4SLinus Torvalds { 1267ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 1268ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || 12691da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12701da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12711da177e4SLinus Torvalds return 1; 12721da177e4SLinus Torvalds return 0; 12731da177e4SLinus Torvalds } 12741da177e4SLinus Torvalds 12751da177e4SLinus Torvalds static __inline__ int 1276f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1277f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12781da177e4SLinus Torvalds unsigned short family) 12791da177e4SLinus Torvalds { 12801da177e4SLinus Torvalds switch (family) { 12811da177e4SLinus Torvalds case AF_INET: 12821da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12831da177e4SLinus Torvalds case AF_INET6: 12841da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12851da177e4SLinus Torvalds } 12861da177e4SLinus Torvalds return 0; 12871da177e4SLinus Torvalds } 12881da177e4SLinus Torvalds 1289e53820deSMasahide NAKAMURA static __inline__ int 1290f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1291e53820deSMasahide NAKAMURA unsigned short family) 1292e53820deSMasahide NAKAMURA { 1293e53820deSMasahide NAKAMURA switch (family) { 1294e53820deSMasahide NAKAMURA case AF_INET: 1295e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12967e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12977e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1298e53820deSMasahide NAKAMURA case AF_INET6: 1299e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 13007e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 13017e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1302e53820deSMasahide NAKAMURA } 1303e53820deSMasahide NAKAMURA return 0; 1304e53820deSMasahide NAKAMURA } 1305e53820deSMasahide NAKAMURA 1306f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 13071da177e4SLinus Torvalds { 13081da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds 13115794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 13125794708fSMasahide NAKAMURA { 1313dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1314dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1315dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1316dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 13175794708fSMasahide NAKAMURA } 13185794708fSMasahide NAKAMURA 13191da177e4SLinus Torvalds /* 13201da177e4SLinus Torvalds * xfrm algorithm information 13211da177e4SLinus Torvalds */ 13221a6509d9SHerbert Xu struct xfrm_algo_aead_info { 1323165ecc63SHerbert Xu char *geniv; 13241a6509d9SHerbert Xu u16 icv_truncbits; 13251a6509d9SHerbert Xu }; 13261a6509d9SHerbert Xu 13271da177e4SLinus Torvalds struct xfrm_algo_auth_info { 13281da177e4SLinus Torvalds u16 icv_truncbits; 13291da177e4SLinus Torvalds u16 icv_fullbits; 13301da177e4SLinus Torvalds }; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds struct xfrm_algo_encr_info { 1333165ecc63SHerbert Xu char *geniv; 13341da177e4SLinus Torvalds u16 blockbits; 13351da177e4SLinus Torvalds u16 defkeybits; 13361da177e4SLinus Torvalds }; 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13391da177e4SLinus Torvalds u16 threshold; 13401da177e4SLinus Torvalds }; 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds struct xfrm_algo_desc { 13431da177e4SLinus Torvalds char *name; 134404ff1260SHerbert Xu char *compat; 13451da177e4SLinus Torvalds u8 available:1; 13467e50f84cSJussi Kivilinna u8 pfkey_supported:1; 13471da177e4SLinus Torvalds union { 13481a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13491da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13501da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13511da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13521da177e4SLinus Torvalds } uinfo; 13531da177e4SLinus Torvalds struct sadb_alg desc; 13541da177e4SLinus Torvalds }; 13551da177e4SLinus Torvalds 13563328715eSSteffen Klassert /* XFRM protocol handlers. */ 13573328715eSSteffen Klassert struct xfrm4_protocol { 13583328715eSSteffen Klassert int (*handler)(struct sk_buff *skb); 13593328715eSSteffen Klassert int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, 13603328715eSSteffen Klassert int encap_type); 13613328715eSSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13623328715eSSteffen Klassert int (*err_handler)(struct sk_buff *skb, u32 info); 13633328715eSSteffen Klassert 13643328715eSSteffen Klassert struct xfrm4_protocol __rcu *next; 13653328715eSSteffen Klassert int priority; 13663328715eSSteffen Klassert }; 13673328715eSSteffen Klassert 13687e14ea15SSteffen Klassert struct xfrm6_protocol { 13697e14ea15SSteffen Klassert int (*handler)(struct sk_buff *skb); 13707e14ea15SSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13717e14ea15SSteffen Klassert int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 13727e14ea15SSteffen Klassert u8 type, u8 code, int offset, __be32 info); 13737e14ea15SSteffen Klassert 13747e14ea15SSteffen Klassert struct xfrm6_protocol __rcu *next; 13757e14ea15SSteffen Klassert int priority; 13767e14ea15SSteffen Klassert }; 13777e14ea15SSteffen Klassert 13781da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13791da177e4SLinus Torvalds struct xfrm_tunnel { 13801da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1381a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1382d2acc347SHerbert Xu 1383b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1384d2acc347SHerbert Xu int priority; 13851da177e4SLinus Torvalds }; 13861da177e4SLinus Torvalds 13871da177e4SLinus Torvalds struct xfrm6_tunnel { 1388d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1389d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1390d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13916f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1392d2acc347SHerbert Xu int priority; 13931da177e4SLinus Torvalds }; 13941da177e4SLinus Torvalds 1395d511337aSJoe Perches void xfrm_init(void); 1396d511337aSJoe Perches void xfrm4_init(void); 1397d511337aSJoe Perches int xfrm_state_init(struct net *net); 1398d511337aSJoe Perches void xfrm_state_fini(struct net *net); 1399d511337aSJoe Perches void xfrm4_state_init(void); 14002f32b51bSSteffen Klassert void xfrm4_protocol_init(void); 1401c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1402d511337aSJoe Perches int xfrm6_init(void); 1403d511337aSJoe Perches void xfrm6_fini(void); 1404d511337aSJoe Perches int xfrm6_state_init(void); 1405d511337aSJoe Perches void xfrm6_state_fini(void); 14067e14ea15SSteffen Klassert int xfrm6_protocol_init(void); 14077e14ea15SSteffen Klassert void xfrm6_protocol_fini(void); 1408c35b7e72SDaniel Lezcano #else 1409c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1410c35b7e72SDaniel Lezcano { 1411c35b7e72SDaniel Lezcano return 0; 1412c35b7e72SDaniel Lezcano } 1413c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1414c35b7e72SDaniel Lezcano { 1415c35b7e72SDaniel Lezcano ; 1416c35b7e72SDaniel Lezcano } 1417c35b7e72SDaniel Lezcano #endif 14181da177e4SLinus Torvalds 1419558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1420d511337aSJoe Perches int xfrm_proc_init(struct net *net); 1421d511337aSJoe Perches void xfrm_proc_fini(struct net *net); 1422558f82efSMasahide NAKAMURA #endif 1423558f82efSMasahide NAKAMURA 1424d511337aSJoe Perches int xfrm_sysctl_init(struct net *net); 1425b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1426d511337aSJoe Perches void xfrm_sysctl_fini(struct net *net); 1427b27aeadbSAlexey Dobriyan #else 1428b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1429b27aeadbSAlexey Dobriyan { 1430b27aeadbSAlexey Dobriyan } 1431b27aeadbSAlexey Dobriyan #endif 1432b27aeadbSAlexey Dobriyan 1433d3623099SNicolas Dichtel void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, 1434870a2df4SNicolas Dichtel struct xfrm_address_filter *filter); 1435d511337aSJoe Perches int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 14364c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1437283bc9f3SFan Du void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); 1438d511337aSJoe Perches struct xfrm_state *xfrm_state_alloc(struct net *net); 1439d511337aSJoe Perches struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 144033765d06SDavid S. Miller const xfrm_address_t *saddr, 1441b520e9f6SDavid S. Miller const struct flowi *fl, 1442b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 14431da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 14441da177e4SLinus Torvalds unsigned short family); 1445d511337aSJoe Perches struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 14465447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1447628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1448628529b6SJamal Hadi Salim unsigned short family, 1449628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 1450c454997eSFan Du struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, 1451c454997eSFan Du unsigned short family); 1452d511337aSJoe Perches int xfrm_state_check_expire(struct xfrm_state *x); 1453d511337aSJoe Perches void xfrm_state_insert(struct xfrm_state *x); 1454d511337aSJoe Perches int xfrm_state_add(struct xfrm_state *x); 1455d511337aSJoe Perches int xfrm_state_update(struct xfrm_state *x); 1456d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1457a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1458bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1459d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1460a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1461a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1462bd55775cSJamal Hadi Salim u8 proto, 1463bd55775cSJamal Hadi Salim unsigned short family); 146441a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1465d511337aSJoe Perches int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 1466283bc9f3SFan Du unsigned short family, struct net *net); 1467d511337aSJoe Perches int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 1468d511337aSJoe Perches unsigned short family); 146941a49cc3SMasahide NAKAMURA #else 147041a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 1471283bc9f3SFan Du int n, unsigned short family, struct net *net) 147241a49cc3SMasahide NAKAMURA { 147341a49cc3SMasahide NAKAMURA return -ENOSYS; 147441a49cc3SMasahide NAKAMURA } 147541a49cc3SMasahide NAKAMURA 147641a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 147741a49cc3SMasahide NAKAMURA int n, unsigned short family) 147841a49cc3SMasahide NAKAMURA { 147941a49cc3SMasahide NAKAMURA return -ENOSYS; 148041a49cc3SMasahide NAKAMURA } 148141a49cc3SMasahide NAKAMURA #endif 1482af11e316SJamal Hadi Salim 1483af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1484af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1485af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1486af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1487af11e316SJamal Hadi Salim }; 1488af11e316SJamal Hadi Salim 14895a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14905a6d3416SJamal Hadi Salim u32 incnt; 14915a6d3416SJamal Hadi Salim u32 outcnt; 14925a6d3416SJamal Hadi Salim u32 fwdcnt; 14935a6d3416SJamal Hadi Salim u32 inscnt; 14945a6d3416SJamal Hadi Salim u32 outscnt; 14955a6d3416SJamal Hadi Salim u32 fwdscnt; 14965a6d3416SJamal Hadi Salim u32 spdhcnt; 14975a6d3416SJamal Hadi Salim u32 spdhmcnt; 14985a6d3416SJamal Hadi Salim }; 14995a6d3416SJamal Hadi Salim 1500d511337aSJoe Perches struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 1501d511337aSJoe Perches int xfrm_state_delete(struct xfrm_state *x); 15022e71029eSTetsuo Handa int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); 1503d511337aSJoe Perches void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1504d511337aSJoe Perches void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1505d511337aSJoe Perches u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 1506d511337aSJoe Perches int xfrm_init_replay(struct xfrm_state *x); 1507d511337aSJoe Perches int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1508d511337aSJoe Perches int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 1509d511337aSJoe Perches int xfrm_init_state(struct xfrm_state *x); 1510d511337aSJoe Perches int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1511d511337aSJoe Perches int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); 1512d511337aSJoe Perches int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1513d511337aSJoe Perches int xfrm_output_resume(struct sk_buff *skb, int err); 15147026b1ddSDavid Miller int xfrm_output(struct sock *sk, struct sk_buff *skb); 1515d511337aSJoe Perches int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1516d511337aSJoe Perches void xfrm_local_error(struct sk_buff *skb, int mtu); 1517d511337aSJoe Perches int xfrm4_extract_header(struct sk_buff *skb); 1518d511337aSJoe Perches int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1519d511337aSJoe Perches int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1520716062fdSHerbert Xu int encap_type); 1521d511337aSJoe Perches int xfrm4_transport_finish(struct sk_buff *skb, int async); 1522d511337aSJoe Perches int xfrm4_rcv(struct sk_buff *skb); 1523c4541b41SHerbert Xu 1524c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1525c4541b41SHerbert Xu { 152670be6c91SSteffen Klassert XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; 15273328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->family = AF_INET; 15283328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); 15293328715eSSteffen Klassert return xfrm_input(skb, nexthdr, spi, 0); 1530c4541b41SHerbert Xu } 1531c4541b41SHerbert Xu 1532d511337aSJoe Perches int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1533d511337aSJoe Perches int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1534ede2059dSEric W. Biederman int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); 15357026b1ddSDavid Miller int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); 15363328715eSSteffen Klassert int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15373328715eSSteffen Klassert int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); 15383328715eSSteffen Klassert int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); 1539d511337aSJoe Perches int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1540d511337aSJoe Perches int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1541d511337aSJoe Perches void xfrm4_local_error(struct sk_buff *skb, u32 mtu); 1542d511337aSJoe Perches int xfrm6_extract_header(struct sk_buff *skb); 1543d511337aSJoe Perches int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 154463c43787SNicolas Dichtel int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, 154563c43787SNicolas Dichtel struct ip6_tnl *t); 1546d511337aSJoe Perches int xfrm6_transport_finish(struct sk_buff *skb, int async); 154763c43787SNicolas Dichtel int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); 1548d511337aSJoe Perches int xfrm6_rcv(struct sk_buff *skb); 1549d511337aSJoe Perches int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1550fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 15517b77d161SDavid S. Miller void xfrm6_local_error(struct sk_buff *skb, u32 mtu); 15527e14ea15SSteffen Klassert int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15537e14ea15SSteffen Klassert int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); 15547e14ea15SSteffen Klassert int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); 1555d511337aSJoe Perches int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 15567b77d161SDavid S. Miller int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1557d511337aSJoe Perches __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1558d511337aSJoe Perches __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 1559d511337aSJoe Perches int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1560d511337aSJoe Perches int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1561ede2059dSEric W. Biederman int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); 15627026b1ddSDavid Miller int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); 1563d511337aSJoe Perches int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1564aee5adb4SMasahide NAKAMURA u8 **prevhdr); 15651da177e4SLinus Torvalds 15661da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1567d511337aSJoe Perches int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 1568d511337aSJoe Perches int xfrm_user_policy(struct sock *sk, int optname, 1569d511337aSJoe Perches u8 __user *optval, int optlen); 15701da177e4SLinus Torvalds #else 15711da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 15721da177e4SLinus Torvalds { 15731da177e4SLinus Torvalds return -ENOPROTOOPT; 15741da177e4SLinus Torvalds } 15751da177e4SLinus Torvalds 1576067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 15771da177e4SLinus Torvalds { 15781da177e4SLinus Torvalds /* should not happen */ 15791da177e4SLinus Torvalds kfree_skb(skb); 15801da177e4SLinus Torvalds return 0; 15811da177e4SLinus Torvalds } 15821da177e4SLinus Torvalds #endif 15831da177e4SLinus Torvalds 15840331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15854c563f76STimo Teras 1586d511337aSJoe Perches void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1587d511337aSJoe Perches int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 1588d511337aSJoe Perches int (*func)(struct xfrm_policy *, int, int, void*), 1589d511337aSJoe Perches void *); 1590283bc9f3SFan Du void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); 15911da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15928ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15938ca2e93bSJamal Hadi Salim u8 type, int dir, 15944e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1595ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1596ef41aaa0SEric Paris int *err); 1597d511337aSJoe Perches struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, 1598d511337aSJoe Perches u32 id, int delete, int *err); 15992e71029eSTetsuo Handa int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); 1600880a6fabSChristophe Gouault void xfrm_policy_hash_rebuild(struct net *net); 16011da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1602776e9dd9SFan Du int verify_spi_info(u8 proto, u32 min, u32 max); 1603d511337aSJoe Perches int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1604e473fcb4SMathias Krause struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, 1605bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1606a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1607a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1608bd55775cSJamal Hadi Salim unsigned short family); 1609d511337aSJoe Perches int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 16101da177e4SLinus Torvalds 161180c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1612d511337aSJoe Perches int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1613183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1614183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 1615283bc9f3SFan Du struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); 1616d511337aSJoe Perches struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, 161780c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1618d511337aSJoe Perches int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 161913c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 16208d549c4fSFan Du struct xfrm_kmaddress *k, struct net *net); 162180c9abaaSShinta Sugimoto #endif 162280c9abaaSShinta Sugimoto 1623d511337aSJoe Perches int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 1624d511337aSJoe Perches void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); 1625d511337aSJoe Perches int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, 1626d511337aSJoe Perches xfrm_address_t *addr); 16271da177e4SLinus Torvalds 1628d511337aSJoe Perches void xfrm_input_init(void); 1629d511337aSJoe Perches int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 16301da177e4SLinus Torvalds 1631d511337aSJoe Perches void xfrm_probe_algs(void); 1632d511337aSJoe Perches int xfrm_count_pfkey_auth_supported(void); 1633d511337aSJoe Perches int xfrm_count_pfkey_enc_supported(void); 1634d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 1635d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 1636d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 1637d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 1638d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 1639d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 1640d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 1641d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 1642d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 16431a6509d9SHerbert Xu int probe); 16441da177e4SLinus Torvalds 1645ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm6_addr_equal(const xfrm_address_t *a, 1646ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b) 1647ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 { 1648ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_equal((const struct in6_addr *)a, 1649ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (const struct in6_addr *)b); 1650ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 } 1651ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 165270e94e66SYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm_addr_equal(const xfrm_address_t *a, 165370e94e66SYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b, 165470e94e66SYOSHIFUJI Hideaki / 吉藤英明 sa_family_t family) 165570e94e66SYOSHIFUJI Hideaki / 吉藤英明 { 165670e94e66SYOSHIFUJI Hideaki / 吉藤英明 switch (family) { 165770e94e66SYOSHIFUJI Hideaki / 吉藤英明 default: 165870e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET: 165970e94e66SYOSHIFUJI Hideaki / 吉藤英明 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; 166070e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET6: 166170e94e66SYOSHIFUJI Hideaki / 吉藤英明 return xfrm6_addr_equal(a, b); 166270e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 166370e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 166470e94e66SYOSHIFUJI Hideaki / 吉藤英明 166577d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 166677d8d7a6SHerbert Xu { 166777d8d7a6SHerbert Xu return index & 7; 166877d8d7a6SHerbert Xu } 166977d8d7a6SHerbert Xu 1670a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1671a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1672f8cd5488SJamal Hadi Salim { 1673be33690dSPatrick McHardy struct sock *nlsk; 1674be33690dSPatrick McHardy int ret = 0; 1675be33690dSPatrick McHardy 1676be33690dSPatrick McHardy rcu_read_lock(); 1677a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1678be33690dSPatrick McHardy if (nlsk) 1679be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1680be33690dSPatrick McHardy rcu_read_unlock(); 1681be33690dSPatrick McHardy return ret; 1682f8cd5488SJamal Hadi Salim } 16830f24558eSHoria Geanta 16840f24558eSHoria Geanta static inline int xfrm_acquire_is_on(struct net *net) 16850f24558eSHoria Geanta { 16860f24558eSHoria Geanta struct sock *nlsk; 16870f24558eSHoria Geanta int ret = 0; 16880f24558eSHoria Geanta 16890f24558eSHoria Geanta rcu_read_lock(); 16900f24558eSHoria Geanta nlsk = rcu_dereference(net->xfrm.nlsk); 16910f24558eSHoria Geanta if (nlsk) 16920f24558eSHoria Geanta ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); 16930f24558eSHoria Geanta rcu_read_unlock(); 16940f24558eSHoria Geanta 16950f24558eSHoria Geanta return ret; 16960f24558eSHoria Geanta } 1697a6483b79SAlexey Dobriyan #endif 1698f8cd5488SJamal Hadi Salim 1699ee5c2317SSteffen Klassert static inline int aead_len(struct xfrm_algo_aead *alg) 1700ee5c2317SSteffen Klassert { 1701ee5c2317SSteffen Klassert return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 1702ee5c2317SSteffen Klassert } 1703ee5c2317SSteffen Klassert 170485158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 17050f99be0dSEric Dumazet { 17060f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17070f99be0dSEric Dumazet } 17080f99be0dSEric Dumazet 170985158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 17104447bb33SMartin Willi { 17114447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17124447bb33SMartin Willi } 17134447bb33SMartin Willi 17149736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 17159736acf3SSteffen Klassert { 17169736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 17179736acf3SSteffen Klassert } 17189736acf3SSteffen Klassert 171980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1720af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1721af2f464eSSteffen Klassert struct xfrm_state *orig) 1722af2f464eSSteffen Klassert { 1723af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1724af2f464eSSteffen Klassert GFP_KERNEL); 1725af2f464eSSteffen Klassert if (!x->replay_esn) 1726af2f464eSSteffen Klassert return -ENOMEM; 1727af2f464eSSteffen Klassert 1728af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1729af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1730af2f464eSSteffen Klassert 1731af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1732af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1733af2f464eSSteffen Klassert GFP_KERNEL); 1734af2f464eSSteffen Klassert if (!x->preplay_esn) { 1735af2f464eSSteffen Klassert kfree(x->replay_esn); 1736af2f464eSSteffen Klassert return -ENOMEM; 1737af2f464eSSteffen Klassert } 1738af2f464eSSteffen Klassert 1739af2f464eSSteffen Klassert return 0; 1740af2f464eSSteffen Klassert } 1741af2f464eSSteffen Klassert 1742ee5c2317SSteffen Klassert static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) 1743ee5c2317SSteffen Klassert { 1744ee5c2317SSteffen Klassert return kmemdup(orig, aead_len(orig), GFP_KERNEL); 1745ee5c2317SSteffen Klassert } 1746ee5c2317SSteffen Klassert 1747ee5c2317SSteffen Klassert 174880c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 174980c9abaaSShinta Sugimoto { 17500f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 175180c9abaaSShinta Sugimoto } 175280c9abaaSShinta Sugimoto 17534447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 17544447bb33SMartin Willi { 17554447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 17564447bb33SMartin Willi } 17574447bb33SMartin Willi 175880c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 175980c9abaaSShinta Sugimoto { 176080c9abaaSShinta Sugimoto int i; 176180c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 176280c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 176380c9abaaSShinta Sugimoto } 176480c9abaaSShinta Sugimoto 176580c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 176680c9abaaSShinta Sugimoto { 176780c9abaaSShinta Sugimoto int i; 176880c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 176980c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 177080c9abaaSShinta Sugimoto } 177180c9abaaSShinta Sugimoto #endif 1772f8cd5488SJamal Hadi Salim 1773def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 177400501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 177500501121SHerbert Xu { 177600501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 177700501121SHerbert Xu } 1778def8b4faSAlexey Dobriyan #endif 177900501121SHerbert Xu 1780bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1781bf825f81SJamal Hadi Salim { 1782bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 17834efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1784bf825f81SJamal Hadi Salim else 1785bf825f81SJamal Hadi Salim m->v = m->m = 0; 1786bf825f81SJamal Hadi Salim 1787bf825f81SJamal Hadi Salim return m->v & m->m; 1788bf825f81SJamal Hadi Salim } 1789bf825f81SJamal Hadi Salim 1790e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1791bf825f81SJamal Hadi Salim { 17921d1e34ddSDavid S. Miller int ret = 0; 1793bf825f81SJamal Hadi Salim 17941d1e34ddSDavid S. Miller if (m->m | m->v) 17951d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 17961d1e34ddSDavid S. Miller return ret; 1797bf825f81SJamal Hadi Salim } 1798bf825f81SJamal Hadi Salim 179970be6c91SSteffen Klassert static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, 180070be6c91SSteffen Klassert unsigned int family) 180170be6c91SSteffen Klassert { 180270be6c91SSteffen Klassert bool tunnel = false; 180370be6c91SSteffen Klassert 180470be6c91SSteffen Klassert switch(family) { 180570be6c91SSteffen Klassert case AF_INET: 180670be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) 180770be6c91SSteffen Klassert tunnel = true; 180870be6c91SSteffen Klassert break; 180970be6c91SSteffen Klassert case AF_INET6: 181070be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) 181170be6c91SSteffen Klassert tunnel = true; 181270be6c91SSteffen Klassert break; 181370be6c91SSteffen Klassert } 181470be6c91SSteffen Klassert if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) 181570be6c91SSteffen Klassert return -EINVAL; 181670be6c91SSteffen Klassert 181770be6c91SSteffen Klassert return 0; 181870be6c91SSteffen Klassert } 18191da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1820