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. */ 1909fdc4883SSteffen Klassert 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 2161da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2171da177e4SLinus Torvalds * transformer. */ 218533cb5b0SEric Dumazet const struct xfrm_type *type; 21913996378SHerbert Xu struct xfrm_mode *inner_mode; 220df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 22113996378SHerbert Xu struct xfrm_mode *outer_mode; 2221da177e4SLinus Torvalds 223df71837dSTrent Jaeger /* Security context */ 224df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 225df71837dSTrent Jaeger 2261da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2271da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2281da177e4SLinus Torvalds void *data; 2291da177e4SLinus Torvalds }; 2301da177e4SLinus Torvalds 231673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 232673c09beSAlexey Dobriyan { 233673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 234673c09beSAlexey Dobriyan } 235673c09beSAlexey Dobriyan 2362717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2372717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 238e3c0d047SFan Du #define XFRM_SOFT_EXPIRE 2 2392717096aSJamal Hadi Salim 2401da177e4SLinus Torvalds enum { 2411da177e4SLinus Torvalds XFRM_STATE_VOID, 2421da177e4SLinus Torvalds XFRM_STATE_ACQ, 2431da177e4SLinus Torvalds XFRM_STATE_VALID, 2441da177e4SLinus Torvalds XFRM_STATE_ERROR, 2451da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2461da177e4SLinus Torvalds XFRM_STATE_DEAD 2471da177e4SLinus Torvalds }; 2481da177e4SLinus Torvalds 24926b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 250fd2c3ef7SEric Dumazet struct km_event { 251bf08867fSHerbert Xu union { 252bf08867fSHerbert Xu u32 hard; 253bf08867fSHerbert Xu u32 proto; 254bf08867fSHerbert Xu u32 byid; 255f8cd5488SJamal Hadi Salim u32 aevent; 256f7b6983fSMasahide NAKAMURA u32 type; 257bf08867fSHerbert Xu } data; 258bf08867fSHerbert Xu 25926b15dadSJamal Hadi Salim u32 seq; 26015e47304SEric W. Biederman u32 portid; 26126b15dadSJamal Hadi Salim u32 event; 2627067802eSAlexey Dobriyan struct net *net; 26326b15dadSJamal Hadi Salim }; 26426b15dadSJamal Hadi Salim 2659fdc4883SSteffen Klassert struct xfrm_replay { 2669fdc4883SSteffen Klassert void (*advance)(struct xfrm_state *x, __be32 net_seq); 2679fdc4883SSteffen Klassert int (*check)(struct xfrm_state *x, 2689fdc4883SSteffen Klassert struct sk_buff *skb, 2699fdc4883SSteffen Klassert __be32 net_seq); 2703b59df46SSteffen Klassert int (*recheck)(struct xfrm_state *x, 2713b59df46SSteffen Klassert struct sk_buff *skb, 2723b59df46SSteffen Klassert __be32 net_seq); 2739fdc4883SSteffen Klassert void (*notify)(struct xfrm_state *x, int event); 2749fdc4883SSteffen Klassert int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); 2759fdc4883SSteffen Klassert }; 2769fdc4883SSteffen Klassert 27725ee3286SHerbert Xu struct net_device; 2781da177e4SLinus Torvalds struct xfrm_type; 2791da177e4SLinus Torvalds struct xfrm_dst; 2801da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2811da177e4SLinus Torvalds unsigned short family; 2821da177e4SLinus Torvalds struct dst_ops *dst_ops; 283ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 28442a7b32bSDavid Ahern struct dst_entry *(*dst_lookup)(struct net *net, 28542a7b32bSDavid Ahern int tos, int oif, 2865e6b930fSDavid S. Miller const xfrm_address_t *saddr, 2875e6b930fSDavid S. Miller const xfrm_address_t *daddr); 28842a7b32bSDavid Ahern int (*get_saddr)(struct net *net, int oif, 28942a7b32bSDavid Ahern xfrm_address_t *saddr, 29042a7b32bSDavid Ahern xfrm_address_t *daddr); 2911da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 292d5422efeSHerbert Xu struct flowi *fl, 293d5422efeSHerbert Xu int reverse); 29405d84025SDavid S. Miller int (*get_tos)(const struct flowi *fl); 295a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 296a1b05140SMasahide NAKAMURA struct dst_entry *dst, 297a1b05140SMasahide NAKAMURA int nfheader_len); 29825ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 29987c1e12bSHerbert Xu struct net_device *dev, 3000c7b3eefSDavid S. Miller const struct flowi *fl); 3012774c131SDavid S. Miller struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); 3021da177e4SLinus Torvalds }; 3031da177e4SLinus Torvalds 304d511337aSJoe Perches int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 305d511337aSJoe Perches int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 306d511337aSJoe Perches void km_policy_notify(struct xfrm_policy *xp, int dir, 307d511337aSJoe Perches const struct km_event *c); 308d511337aSJoe Perches void km_state_notify(struct xfrm_state *x, const struct km_event *c); 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds struct xfrm_tmpl; 311d511337aSJoe Perches int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, 312d511337aSJoe Perches struct xfrm_policy *pol); 313d511337aSJoe Perches void km_state_expired(struct xfrm_state *x, int hard, u32 portid); 314d511337aSJoe Perches int __xfrm_state_delete(struct xfrm_state *x); 31553bc6b4dSJamal Hadi Salim 3161da177e4SLinus Torvalds struct xfrm_state_afinfo { 31717c2a42aSHerbert Xu unsigned int family; 31836cf9acfSHerbert Xu unsigned int proto; 3198e3d716cSAl Viro __be16 eth_proto; 32017c2a42aSHerbert Xu struct module *owner; 321533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 322aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 323d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 32473e5ebb2SDavid S. Miller void (*init_tempsel)(struct xfrm_selector *sel, 32573e5ebb2SDavid S. Miller const struct flowi *fl); 32619bd6244SDavid S. Miller void (*init_temprop)(struct xfrm_state *x, 32719bd6244SDavid S. Miller const struct xfrm_tmpl *tmpl, 32819bd6244SDavid S. Miller const xfrm_address_t *daddr, 32919bd6244SDavid S. Miller const xfrm_address_t *saddr); 33041a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 33141a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 332ede2059dSEric W. Biederman int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); 3337026b1ddSDavid Miller int (*output_finish)(struct sock *sk, struct sk_buff *skb); 334227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 335227620e2SHerbert Xu struct sk_buff *skb); 33636cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 33736cf9acfSHerbert Xu struct sk_buff *skb); 338716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 339716062fdSHerbert Xu int async); 340628e341fSHannes Frederic Sowa void (*local_error)(struct sk_buff *skb, u32 mtu); 3411da177e4SLinus Torvalds }; 3421da177e4SLinus Torvalds 343d511337aSJoe Perches int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 344d511337aSJoe Perches int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 345d511337aSJoe Perches struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); 346d511337aSJoe Perches void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); 3471da177e4SLinus Torvalds 3482f32b51bSSteffen Klassert struct xfrm_input_afinfo { 3492f32b51bSSteffen Klassert unsigned int family; 3502f32b51bSSteffen Klassert struct module *owner; 3512f32b51bSSteffen Klassert int (*callback)(struct sk_buff *skb, u8 protocol, 3522f32b51bSSteffen Klassert int err); 3532f32b51bSSteffen Klassert }; 3542f32b51bSSteffen Klassert 3552f32b51bSSteffen Klassert int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo); 3562f32b51bSSteffen Klassert int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo); 3572f32b51bSSteffen Klassert 358d511337aSJoe Perches void xfrm_state_delete_tunnel(struct xfrm_state *x); 3591da177e4SLinus Torvalds 360fd2c3ef7SEric Dumazet struct xfrm_type { 3611da177e4SLinus Torvalds char *description; 3621da177e4SLinus Torvalds struct module *owner; 363a6337463Sjamal u8 proto; 364a6337463Sjamal u8 flags; 3651b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 366436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 367f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 368f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3691da177e4SLinus Torvalds 37072cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3711da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 372e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3731da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 3748f029de2SDavid S. Miller int (*reject)(struct xfrm_state *, struct sk_buff *, 3758f029de2SDavid S. Miller const struct flowi *); 376aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3771da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 378c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3791da177e4SLinus Torvalds }; 3801da177e4SLinus Torvalds 381d511337aSJoe Perches int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 382d511337aSJoe Perches int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3831da177e4SLinus Torvalds 384b59f45d0SHerbert Xu struct xfrm_mode { 385227620e2SHerbert Xu /* 386227620e2SHerbert Xu * Remove encapsulation header. 387227620e2SHerbert Xu * 388227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 389227620e2SHerbert Xu * header. 390227620e2SHerbert Xu * 391227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 392227620e2SHerbert Xu * should be and the network header shall be set to where the IP 393227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 394227620e2SHerbert Xu * payload. 395227620e2SHerbert Xu */ 396227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 397227620e2SHerbert Xu 398227620e2SHerbert Xu /* 399227620e2SHerbert Xu * This is the actual input entry point. 400227620e2SHerbert Xu * 401227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 402227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 403227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 404227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 405227620e2SHerbert Xu */ 406b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 40737fedd3aSHerbert Xu 40837fedd3aSHerbert Xu /* 40937fedd3aSHerbert Xu * Add encapsulation header. 41037fedd3aSHerbert Xu * 41137fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 41237fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 41337fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 41437fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 41537fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 41637fedd3aSHerbert Xu * header. The value of the network header will always point 41737fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 41837fedd3aSHerbert Xu */ 41936cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 42036cf9acfSHerbert Xu 42136cf9acfSHerbert Xu /* 42236cf9acfSHerbert Xu * This is the actual output entry point. 42336cf9acfSHerbert Xu * 42436cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 42536cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 42636cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 42736cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 42836cf9acfSHerbert Xu * call output2. 42936cf9acfSHerbert Xu */ 430eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 431b59f45d0SHerbert Xu 43217c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 433b59f45d0SHerbert Xu struct module *owner; 434b59f45d0SHerbert Xu unsigned int encap; 4351bfcb10fSHerbert Xu int flags; 4361bfcb10fSHerbert Xu }; 4371bfcb10fSHerbert Xu 4381bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4391bfcb10fSHerbert Xu enum { 4401bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 441b59f45d0SHerbert Xu }; 442b59f45d0SHerbert Xu 443d511337aSJoe Perches int xfrm_register_mode(struct xfrm_mode *mode, int family); 444d511337aSJoe Perches int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 445b59f45d0SHerbert Xu 446df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 447df9dcb45SKazunori MIYAZAWA { 448df9dcb45SKazunori MIYAZAWA switch(family) { 449df9dcb45SKazunori MIYAZAWA case AF_INET: 450df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 451df9dcb45SKazunori MIYAZAWA case AF_INET6: 452df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 453df9dcb45SKazunori MIYAZAWA default: 454df9dcb45SKazunori MIYAZAWA return 0; 455df9dcb45SKazunori MIYAZAWA } 456df9dcb45SKazunori MIYAZAWA } 457df9dcb45SKazunori MIYAZAWA 458df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 459df9dcb45SKazunori MIYAZAWA { 460df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 461df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 462df9dcb45SKazunori MIYAZAWA return x->inner_mode; 463df9dcb45SKazunori MIYAZAWA else 464df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 465df9dcb45SKazunori MIYAZAWA } 466df9dcb45SKazunori MIYAZAWA 467fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4681da177e4SLinus Torvalds /* id in template is interpreted as: 4691da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4701da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4711da177e4SLinus Torvalds * daddr must be fixed too. 4721da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4731da177e4SLinus Torvalds */ 4741da177e4SLinus Torvalds struct xfrm_id id; 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4771da177e4SLinus Torvalds xfrm_address_t saddr; 4781da177e4SLinus Torvalds 47976b3f055SMiika Komu unsigned short encap_family; 48076b3f055SMiika Komu 481a6337463Sjamal u32 reqid; 4821da177e4SLinus Torvalds 4837e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 484a6337463Sjamal u8 mode; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 487a6337463Sjamal u8 share; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 490a6337463Sjamal u8 optional; 4911da177e4SLinus Torvalds 492c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 493a6337463Sjamal u8 allalgs; 494c5d18e98SHerbert Xu 4951da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 496a6337463Sjamal u32 aalgos; 497a6337463Sjamal u32 ealgos; 498a6337463Sjamal u32 calgos; 4991da177e4SLinus Torvalds }; 5001da177e4SLinus Torvalds 501622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 5021da177e4SLinus Torvalds 50312a169e7SHerbert Xu struct xfrm_policy_walk_entry { 50412a169e7SHerbert Xu struct list_head all; 50512a169e7SHerbert Xu u8 dead; 50612a169e7SHerbert Xu }; 50712a169e7SHerbert Xu 50812a169e7SHerbert Xu struct xfrm_policy_walk { 50912a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 51012a169e7SHerbert Xu u8 type; 51112a169e7SHerbert Xu u32 seq; 51212a169e7SHerbert Xu }; 51312a169e7SHerbert Xu 514a0073fe1SSteffen Klassert struct xfrm_policy_queue { 515a0073fe1SSteffen Klassert struct sk_buff_head hold_queue; 516a0073fe1SSteffen Klassert struct timer_list hold_timer; 517a0073fe1SSteffen Klassert unsigned long timeout; 518a0073fe1SSteffen Klassert }; 519a0073fe1SSteffen Klassert 520fd2c3ef7SEric Dumazet struct xfrm_policy { 5210c5c9fb5SEric W. Biederman possible_net_t xp_net; 5222518c7c2SDavid S. Miller struct hlist_node bydst; 5232518c7c2SDavid S. Miller struct hlist_node byidx; 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 5261da177e4SLinus Torvalds rwlock_t lock; 5271da177e4SLinus Torvalds atomic_t refcnt; 5281da177e4SLinus Torvalds struct timer_list timer; 5291da177e4SLinus Torvalds 530fe1a5f03STimo Teräs struct flow_cache_object flo; 53180c802f3STimo Teräs atomic_t genid; 5321da177e4SLinus Torvalds u32 priority; 5331da177e4SLinus Torvalds u32 index; 534bf825f81SJamal Hadi Salim struct xfrm_mark mark; 5351da177e4SLinus Torvalds struct xfrm_selector selector; 5361da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 5371da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 53812a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 539a0073fe1SSteffen Klassert struct xfrm_policy_queue polq; 54046ca5f5dSArnaldo Carvalho de Melo u8 type; 54146ca5f5dSArnaldo Carvalho de Melo u8 action; 54246ca5f5dSArnaldo Carvalho de Melo u8 flags; 54346ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 54412a169e7SHerbert Xu u16 family; 545df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5461da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 54756f04730SEric Dumazet struct rcu_head rcu; 5481da177e4SLinus Torvalds }; 5491da177e4SLinus Torvalds 55063eb23f5SDavid S. Miller static inline struct net *xp_net(const struct xfrm_policy *xp) 5510331b1f3SAlexey Dobriyan { 5520331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5530331b1f3SAlexey Dobriyan } 5540331b1f3SAlexey Dobriyan 55513c1d189SArnaud Ebalard struct xfrm_kmaddress { 55613c1d189SArnaud Ebalard xfrm_address_t local; 55713c1d189SArnaud Ebalard xfrm_address_t remote; 55813c1d189SArnaud Ebalard u32 reserved; 55913c1d189SArnaud Ebalard u16 family; 56013c1d189SArnaud Ebalard }; 56113c1d189SArnaud Ebalard 56280c9abaaSShinta Sugimoto struct xfrm_migrate { 56380c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 56480c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 56580c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 56680c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 56780c9abaaSShinta Sugimoto u8 proto; 56880c9abaaSShinta Sugimoto u8 mode; 56980c9abaaSShinta Sugimoto u16 reserved; 57080c9abaaSShinta Sugimoto u32 reqid; 57180c9abaaSShinta Sugimoto u16 old_family; 57280c9abaaSShinta Sugimoto u16 new_family; 57380c9abaaSShinta Sugimoto }; 57480c9abaaSShinta Sugimoto 5751da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 576f8cd5488SJamal Hadi Salim /* what happened */ 577f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 578f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 579f8cd5488SJamal Hadi Salim 580f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 581f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 582f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 583f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 584f8cd5488SJamal Hadi Salim /* default seq threshold size */ 585f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5861da177e4SLinus Torvalds 587fd2c3ef7SEric Dumazet struct xfrm_mgr { 5881da177e4SLinus Torvalds struct list_head list; 5891da177e4SLinus Torvalds char *id; 590214e005bSDavid S. Miller int (*notify)(struct xfrm_state *x, const struct km_event *c); 59165e0736bSFan Du int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); 592cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5935d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 594214e005bSDavid S. Miller int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); 595db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 596183cad12SDavid S. Miller int (*migrate)(const struct xfrm_selector *sel, 597183cad12SDavid S. Miller u8 dir, u8 type, 598183cad12SDavid S. Miller const struct xfrm_migrate *m, 599183cad12SDavid S. Miller int num_bundles, 600183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 6010f24558eSHoria Geanta bool (*is_alive)(const struct km_event *c); 6021da177e4SLinus Torvalds }; 6031da177e4SLinus Torvalds 604d511337aSJoe Perches int xfrm_register_km(struct xfrm_mgr *km); 605d511337aSJoe Perches int xfrm_unregister_km(struct xfrm_mgr *km); 6061da177e4SLinus Torvalds 60770be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb { 60870be6c91SSteffen Klassert union { 60970be6c91SSteffen Klassert struct inet_skb_parm h4; 61070be6c91SSteffen Klassert struct inet6_skb_parm h6; 61170be6c91SSteffen Klassert } header; 61270be6c91SSteffen Klassert 61370be6c91SSteffen Klassert union { 61470be6c91SSteffen Klassert struct ip_tunnel *ip4; 61570be6c91SSteffen Klassert struct ip6_tnl *ip6; 61670be6c91SSteffen Klassert } tunnel; 61770be6c91SSteffen Klassert }; 61870be6c91SSteffen Klassert 61970be6c91SSteffen Klassert #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) 62070be6c91SSteffen Klassert 621436a0a40SHerbert Xu /* 622436a0a40SHerbert Xu * This structure is used for the duration where packets are being 623436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 624436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 625436a0a40SHerbert Xu */ 626436a0a40SHerbert Xu struct xfrm_skb_cb { 62770be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 628436a0a40SHerbert Xu 629436a0a40SHerbert Xu /* Sequence number for replay protection. */ 630b318e0e4SHerbert Xu union { 6311ce3644aSSteffen Klassert struct { 6321ce3644aSSteffen Klassert __u32 low; 6331ce3644aSSteffen Klassert __u32 hi; 6341ce3644aSSteffen Klassert } output; 6351ce3644aSSteffen Klassert struct { 6361ce3644aSSteffen Klassert __be32 low; 6371ce3644aSSteffen Klassert __be32 hi; 6381ce3644aSSteffen Klassert } input; 639b318e0e4SHerbert Xu } seq; 640436a0a40SHerbert Xu }; 641436a0a40SHerbert Xu 642436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 643436a0a40SHerbert Xu 64436cf9acfSHerbert Xu /* 64536cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 64636cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 64736cf9acfSHerbert Xu */ 64836cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 64970be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 65036cf9acfSHerbert Xu 65136cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 65236cf9acfSHerbert Xu __be16 id; 65336cf9acfSHerbert Xu __be16 frag_off; 65436cf9acfSHerbert Xu 655732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 656732c8bd5SHerbert Xu u8 ihl; 657732c8bd5SHerbert Xu 65836cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 65936cf9acfSHerbert Xu u8 tos; 66036cf9acfSHerbert Xu 66136cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 66236cf9acfSHerbert Xu u8 ttl; 66336cf9acfSHerbert Xu 66436cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 66536cf9acfSHerbert Xu u8 protocol; 66636cf9acfSHerbert Xu 667732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 668732c8bd5SHerbert Xu u8 optlen; 669732c8bd5SHerbert Xu 67036cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 67136cf9acfSHerbert Xu u8 flow_lbl[3]; 67236cf9acfSHerbert Xu }; 67336cf9acfSHerbert Xu 67436cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 67536cf9acfSHerbert Xu 676716062fdSHerbert Xu /* 677716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 678716062fdSHerbert Xu * related information. 679716062fdSHerbert Xu */ 680716062fdSHerbert Xu struct xfrm_spi_skb_cb { 68170be6c91SSteffen Klassert struct xfrm_tunnel_skb_cb header; 682716062fdSHerbert Xu 683716062fdSHerbert Xu unsigned int daddroff; 6842fcb45b6SHerbert Xu unsigned int family; 685716062fdSHerbert Xu }; 686716062fdSHerbert Xu 687716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 688716062fdSHerbert Xu 689c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 690afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 691ab5f5e8bSJoy Latten { 692ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 693ab5f5e8bSJoy Latten 694afeb14b4SPaul Moore if (audit_enabled == 0) 695afeb14b4SPaul Moore return NULL; 696ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 697ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 698ab5f5e8bSJoy Latten if (audit_buf == NULL) 699ab5f5e8bSJoy Latten return NULL; 700afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 701afeb14b4SPaul Moore return audit_buf; 702afeb14b4SPaul Moore } 703afeb14b4SPaul Moore 7042e71029eSTetsuo Handa static inline void xfrm_audit_helper_usrinfo(bool task_valid, 705afeb14b4SPaul Moore struct audit_buffer *audit_buf) 706afeb14b4SPaul Moore { 7072e71029eSTetsuo Handa const unsigned int auid = from_kuid(&init_user_ns, task_valid ? 7082e71029eSTetsuo Handa audit_get_loginuid(current) : 7092e71029eSTetsuo Handa INVALID_UID); 7102e71029eSTetsuo Handa const unsigned int ses = task_valid ? audit_get_sessionid(current) : 7112e71029eSTetsuo Handa (unsigned int) -1; 7122e71029eSTetsuo Handa 7132e71029eSTetsuo Handa audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 714ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 715ab5f5e8bSJoy Latten } 716ab5f5e8bSJoy Latten 7172e71029eSTetsuo Handa void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); 7182e71029eSTetsuo Handa void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7192e71029eSTetsuo Handa bool task_valid); 7202e71029eSTetsuo Handa void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); 7212e71029eSTetsuo Handa void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); 722d511337aSJoe Perches void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 723afeb14b4SPaul Moore struct sk_buff *skb); 724d511337aSJoe Perches void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, 725d511337aSJoe Perches __be32 net_seq); 726d511337aSJoe Perches void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 727d511337aSJoe Perches void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, 728d511337aSJoe Perches __be32 net_seq); 729d511337aSJoe Perches void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, 730d511337aSJoe Perches u8 proto); 731c9204d9cSJoy Latten #else 73241fef0eeSMarcin Slusarz 73341fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 7342e71029eSTetsuo Handa bool task_valid) 73541fef0eeSMarcin Slusarz { 73641fef0eeSMarcin Slusarz } 73741fef0eeSMarcin Slusarz 73841fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 7392e71029eSTetsuo Handa bool task_valid) 74041fef0eeSMarcin Slusarz { 74141fef0eeSMarcin Slusarz } 74241fef0eeSMarcin Slusarz 74341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 7442e71029eSTetsuo Handa bool task_valid) 74541fef0eeSMarcin Slusarz { 74641fef0eeSMarcin Slusarz } 74741fef0eeSMarcin Slusarz 74841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 7492e71029eSTetsuo Handa bool task_valid) 75041fef0eeSMarcin Slusarz { 75141fef0eeSMarcin Slusarz } 75241fef0eeSMarcin Slusarz 75341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 75441fef0eeSMarcin Slusarz struct sk_buff *skb) 75541fef0eeSMarcin Slusarz { 75641fef0eeSMarcin Slusarz } 75741fef0eeSMarcin Slusarz 7589fdc4883SSteffen Klassert static inline void xfrm_audit_state_replay(struct xfrm_state *x, 7599fdc4883SSteffen Klassert struct sk_buff *skb, __be32 net_seq) 7609fdc4883SSteffen Klassert { 7619fdc4883SSteffen Klassert } 7629fdc4883SSteffen Klassert 76341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 76441fef0eeSMarcin Slusarz u16 family) 76541fef0eeSMarcin Slusarz { 76641fef0eeSMarcin Slusarz } 76741fef0eeSMarcin Slusarz 76841fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 76941fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 77041fef0eeSMarcin Slusarz { 77141fef0eeSMarcin Slusarz } 77241fef0eeSMarcin Slusarz 77341fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 77441fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 77541fef0eeSMarcin Slusarz { 77641fef0eeSMarcin Slusarz } 777c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 778161a09e7SJoy Latten 7791da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7801da177e4SLinus Torvalds { 7811da177e4SLinus Torvalds if (likely(policy != NULL)) 7821da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds 785d511337aSJoe Perches void xfrm_policy_destroy(struct xfrm_policy *policy); 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7881da177e4SLinus Torvalds { 7891da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 79064c31b3fSWANG Cong xfrm_policy_destroy(policy); 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 7934e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7944e81bb83SMasahide NAKAMURA { 7954e81bb83SMasahide NAKAMURA int i; 7964e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7974e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7984e81bb83SMasahide NAKAMURA } 7994e81bb83SMasahide NAKAMURA 800d511337aSJoe Perches void __xfrm_state_destroy(struct xfrm_state *); 8011da177e4SLinus Torvalds 80221380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 80321380b81SHerbert Xu { 80421380b81SHerbert Xu atomic_dec(&x->refcnt); 80521380b81SHerbert Xu } 80621380b81SHerbert Xu 8071da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 8081da177e4SLinus Torvalds { 8091da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 8101da177e4SLinus Torvalds __xfrm_state_destroy(x); 8111da177e4SLinus Torvalds } 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 8141da177e4SLinus Torvalds { 8151da177e4SLinus Torvalds atomic_inc(&x->refcnt); 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds 8181744a8feSDavid S. Miller static inline bool addr_match(const void *token1, const void *token2, 8191744a8feSDavid S. Miller int prefixlen) 8201da177e4SLinus Torvalds { 8211744a8feSDavid S. Miller const __be32 *a1 = token1; 8221744a8feSDavid S. Miller const __be32 *a2 = token2; 8231da177e4SLinus Torvalds int pdw; 8241da177e4SLinus Torvalds int pbi; 8251da177e4SLinus Torvalds 826a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 8271da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds if (pdw) 8301da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 8311744a8feSDavid S. Miller return false; 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds if (pbi) { 8345f19343fSAl Viro __be32 mask; 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 8391744a8feSDavid S. Miller return false; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds 8421744a8feSDavid S. Miller return true; 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 84526bff940SAlexey Dobriyan static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) 84626bff940SAlexey Dobriyan { 84726bff940SAlexey Dobriyan /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ 84826bff940SAlexey Dobriyan if (prefixlen == 0) 84926bff940SAlexey Dobriyan return true; 85026bff940SAlexey Dobriyan return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); 85126bff940SAlexey Dobriyan } 85226bff940SAlexey Dobriyan 8531da177e4SLinus Torvalds static __inline__ 8546281dcc9SDavid S. Miller __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) 8551da177e4SLinus Torvalds { 856f9d07e41SAl Viro __be16 port; 8571d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8581da177e4SLinus Torvalds case IPPROTO_TCP: 8591da177e4SLinus Torvalds case IPPROTO_UDP: 860ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8611da177e4SLinus Torvalds case IPPROTO_SCTP: 8626281dcc9SDavid S. Miller port = uli->ports.sport; 8631da177e4SLinus Torvalds break; 8641da177e4SLinus Torvalds case IPPROTO_ICMP: 8651da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8666281dcc9SDavid S. Miller port = htons(uli->icmpt.type); 8671da177e4SLinus Torvalds break; 8682ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8696281dcc9SDavid S. Miller port = htons(uli->mht.type); 8702ce4272aSMasahide NAKAMURA break; 871cc9ff19dSTimo Teräs case IPPROTO_GRE: 8726281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) >> 16); 873cc9ff19dSTimo Teräs break; 8741da177e4SLinus Torvalds default: 8751da177e4SLinus Torvalds port = 0; /*XXX*/ 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds return port; 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds 8801da177e4SLinus Torvalds static __inline__ 8816281dcc9SDavid S. Miller __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) 8821da177e4SLinus Torvalds { 883f9d07e41SAl Viro __be16 port; 8841d28f42cSDavid S. Miller switch(fl->flowi_proto) { 8851da177e4SLinus Torvalds case IPPROTO_TCP: 8861da177e4SLinus Torvalds case IPPROTO_UDP: 887ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8881da177e4SLinus Torvalds case IPPROTO_SCTP: 8896281dcc9SDavid S. Miller port = uli->ports.dport; 8901da177e4SLinus Torvalds break; 8911da177e4SLinus Torvalds case IPPROTO_ICMP: 8921da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8936281dcc9SDavid S. Miller port = htons(uli->icmpt.code); 8941da177e4SLinus Torvalds break; 895cc9ff19dSTimo Teräs case IPPROTO_GRE: 8966281dcc9SDavid S. Miller port = htons(ntohl(uli->gre_key) & 0xffff); 897cc9ff19dSTimo Teräs break; 8981da177e4SLinus Torvalds default: 8991da177e4SLinus Torvalds port = 0; /*XXX*/ 9001da177e4SLinus Torvalds } 9011da177e4SLinus Torvalds return port; 9021da177e4SLinus Torvalds } 9031da177e4SLinus Torvalds 904d511337aSJoe Perches bool xfrm_selector_match(const struct xfrm_selector *sel, 905d511337aSJoe Perches const struct flowi *fl, unsigned short family); 9061da177e4SLinus Torvalds 907df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 908df71837dSTrent Jaeger /* If neither has a context --> match 909df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 910df71837dSTrent Jaeger */ 911bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 912df71837dSTrent Jaeger { 913df71837dSTrent Jaeger return ((!s1 && !s2) || 914df71837dSTrent Jaeger (s1 && s2 && 915df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 916df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 917df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 918df71837dSTrent Jaeger } 919df71837dSTrent Jaeger #else 920bc9b35adSDavid S. Miller static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 921df71837dSTrent Jaeger { 922bc9b35adSDavid S. Miller return true; 923df71837dSTrent Jaeger } 924df71837dSTrent Jaeger #endif 925df71837dSTrent Jaeger 9261da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 9271da177e4SLinus Torvalds * 9281da177e4SLinus Torvalds * dst->child points to the next element of bundle. 9291da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 9301da177e4SLinus Torvalds * 9311da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 9321da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 9331da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 9341da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 9351da177e4SLinus Torvalds * policy rule. 9361da177e4SLinus Torvalds */ 937fd2c3ef7SEric Dumazet struct xfrm_dst { 9381da177e4SLinus Torvalds union { 9391da177e4SLinus Torvalds struct dst_entry dst; 9401da177e4SLinus Torvalds struct rtable rt; 9411da177e4SLinus Torvalds struct rt6_info rt6; 9421da177e4SLinus Torvalds } u; 9431da177e4SLinus Torvalds struct dst_entry *route; 94480c802f3STimo Teräs struct flow_cache_object flo; 94580c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 94680c802f3STimo Teräs int num_pols, num_xfrms; 947157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 948157bfc25SMasahide NAKAMURA struct flowi *origin; 949157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 950157bfc25SMasahide NAKAMURA #endif 95180c802f3STimo Teräs u32 xfrm_genid; 95280c802f3STimo Teräs u32 policy_genid; 9531da177e4SLinus Torvalds u32 route_mtu_cached; 9541da177e4SLinus Torvalds u32 child_mtu_cached; 95592d63decSHideaki YOSHIFUJI u32 route_cookie; 95692d63decSHideaki YOSHIFUJI u32 path_cookie; 9571da177e4SLinus Torvalds }; 9581da177e4SLinus Torvalds 959def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 960aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 961aabc9761SHerbert Xu { 96280c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 963aabc9761SHerbert Xu dst_release(xdst->route); 964aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 965aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 966157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 967157bfc25SMasahide NAKAMURA kfree(xdst->origin); 968157bfc25SMasahide NAKAMURA xdst->origin = NULL; 969157bfc25SMasahide NAKAMURA kfree(xdst->partner); 970157bfc25SMasahide NAKAMURA xdst->partner = NULL; 971157bfc25SMasahide NAKAMURA #endif 972aabc9761SHerbert Xu } 973def8b4faSAlexey Dobriyan #endif 974aabc9761SHerbert Xu 975d511337aSJoe Perches void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 976aabc9761SHerbert Xu 977fd2c3ef7SEric Dumazet struct sec_path { 9781da177e4SLinus Torvalds atomic_t refcnt; 9791da177e4SLinus Torvalds int len; 980dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9811da177e4SLinus Torvalds }; 9821da177e4SLinus Torvalds 983990078afSMichael Smith static inline int secpath_exists(struct sk_buff *skb) 984990078afSMichael Smith { 985990078afSMichael Smith #ifdef CONFIG_XFRM 986990078afSMichael Smith return skb->sp != NULL; 987990078afSMichael Smith #else 988990078afSMichael Smith return 0; 989990078afSMichael Smith #endif 990990078afSMichael Smith } 991990078afSMichael Smith 9921da177e4SLinus Torvalds static inline struct sec_path * 9931da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9941da177e4SLinus Torvalds { 9951da177e4SLinus Torvalds if (sp) 9961da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9971da177e4SLinus Torvalds return sp; 9981da177e4SLinus Torvalds } 9991da177e4SLinus Torvalds 1000d511337aSJoe Perches void __secpath_destroy(struct sec_path *sp); 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds static inline void 10031da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 10041da177e4SLinus Torvalds { 10051da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 10061da177e4SLinus Torvalds __secpath_destroy(sp); 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds 1009d511337aSJoe Perches struct sec_path *secpath_dup(struct sec_path *src); 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds static inline void 10121da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 10131da177e4SLinus Torvalds { 10141da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10151da177e4SLinus Torvalds secpath_put(skb->sp); 10161da177e4SLinus Torvalds skb->sp = NULL; 10171da177e4SLinus Torvalds #endif 10181da177e4SLinus Torvalds } 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds static inline int 10216cc32961SDavid S. Miller xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) 1022a1e59abfSPatrick McHardy { 1023a1e59abfSPatrick McHardy switch (family) { 1024a1e59abfSPatrick McHardy case AF_INET: 1025a1e59abfSPatrick McHardy return addr->a4 == 0; 1026a1e59abfSPatrick McHardy case AF_INET6: 102715e318bdSJiri Benc return ipv6_addr_any(&addr->in6); 1028a1e59abfSPatrick McHardy } 1029a1e59abfSPatrick McHardy return 0; 1030a1e59abfSPatrick McHardy } 1031a1e59abfSPatrick McHardy 1032a1e59abfSPatrick McHardy static inline int 103321eddb5cSDavid S. Miller __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10341da177e4SLinus Torvalds { 10351da177e4SLinus Torvalds return (tmpl->saddr.a4 && 10361da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds static inline int 104021eddb5cSDavid S. Miller __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) 10411da177e4SLinus Torvalds { 10421da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 1043ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds 10461da177e4SLinus Torvalds static inline int 104721eddb5cSDavid S. Miller xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) 10481da177e4SLinus Torvalds { 10491da177e4SLinus Torvalds switch (family) { 10501da177e4SLinus Torvalds case AF_INET: 10511da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 10521da177e4SLinus Torvalds case AF_INET6: 10531da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 10541da177e4SLinus Torvalds } 10551da177e4SLinus Torvalds return !0; 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1059d511337aSJoe Perches int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, 1060d511337aSJoe Perches unsigned short family); 10611da177e4SLinus Torvalds 1062d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 1063d5422efeSHerbert Xu struct sk_buff *skb, 1064d5422efeSHerbert Xu unsigned int family, int reverse) 10651da177e4SLinus Torvalds { 1066f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 1067d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 1068d5422efeSHerbert Xu 10691da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1070d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10711da177e4SLinus Torvalds 1072f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 1073adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 1074d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1075d5422efeSHerbert Xu } 1076d5422efeSHerbert Xu 1077d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1078d5422efeSHerbert Xu { 1079d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10831da177e4SLinus Torvalds { 10841da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10881da177e4SLinus Torvalds { 10891da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 1092d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1093d5422efeSHerbert Xu struct sk_buff *skb) 1094d5422efeSHerbert Xu { 1095d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1096d5422efeSHerbert Xu } 1097d5422efeSHerbert Xu 1098d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1099d5422efeSHerbert Xu struct sk_buff *skb) 1100d5422efeSHerbert Xu { 1101d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1102d5422efeSHerbert Xu } 1103d5422efeSHerbert Xu 1104d511337aSJoe Perches int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1105d5422efeSHerbert Xu unsigned int family, int reverse); 1106d5422efeSHerbert Xu 1107d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1108d5422efeSHerbert Xu unsigned int family) 1109d5422efeSHerbert Xu { 1110d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1111d5422efeSHerbert Xu } 1112d5422efeSHerbert Xu 1113d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1114d5422efeSHerbert Xu struct flowi *fl, 1115d5422efeSHerbert Xu unsigned int family) 1116d5422efeSHerbert Xu { 1117d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1118d5422efeSHerbert Xu } 1119d5422efeSHerbert Xu 1120d511337aSJoe Perches int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 11231da177e4SLinus Torvalds { 112499a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 112599a66657SAlexey Dobriyan 112699a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1127adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 11281da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 11321da177e4SLinus Torvalds { 11331da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 11371da177e4SLinus Torvalds { 11381da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 11391da177e4SLinus Torvalds } 11401da177e4SLinus Torvalds 1141d188ba86SEric Dumazet int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); 11421da177e4SLinus Torvalds 1143d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) 11441da177e4SLinus Torvalds { 1145d188ba86SEric Dumazet sk->sk_policy[0] = NULL; 1146d188ba86SEric Dumazet sk->sk_policy[1] = NULL; 1147d188ba86SEric Dumazet if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) 1148d188ba86SEric Dumazet return __xfrm_sk_clone_policy(sk, osk); 11491da177e4SLinus Torvalds return 0; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 1152d511337aSJoe Perches int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 11551da177e4SLinus Torvalds { 1156d188ba86SEric Dumazet struct xfrm_policy *pol; 1157d188ba86SEric Dumazet 1158d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[0], 1); 1159d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1160d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX); 11611da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 11621da177e4SLinus Torvalds } 1163d188ba86SEric Dumazet pol = rcu_dereference_protected(sk->sk_policy[1], 1); 1164d188ba86SEric Dumazet if (unlikely(pol != NULL)) { 1165d188ba86SEric Dumazet xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); 11661da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds 1170d511337aSJoe Perches void xfrm_garbage_collect(struct net *net); 1171e4c17216SPaul Moore 11721da177e4SLinus Torvalds #else 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 1175d188ba86SEric Dumazet static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } 11761da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 11771da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11781da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11791da177e4SLinus Torvalds { 11801da177e4SLinus Torvalds return 1; 11811da177e4SLinus Torvalds } 11821da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11831da177e4SLinus Torvalds { 11841da177e4SLinus Torvalds return 1; 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11871da177e4SLinus Torvalds { 11881da177e4SLinus Torvalds return 1; 11891da177e4SLinus Torvalds } 1190d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1191d5422efeSHerbert Xu struct flowi *fl, 1192d5422efeSHerbert Xu unsigned int family) 1193d5422efeSHerbert Xu { 1194d5422efeSHerbert Xu return -ENOSYS; 1195d5422efeSHerbert Xu } 1196d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1197d5422efeSHerbert Xu struct sk_buff *skb) 1198d5422efeSHerbert Xu { 1199d5422efeSHerbert Xu return 1; 1200d5422efeSHerbert Xu } 1201d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1202d5422efeSHerbert Xu struct sk_buff *skb) 1203d5422efeSHerbert Xu { 1204d5422efeSHerbert Xu return 1; 1205d5422efeSHerbert Xu } 1206e4c17216SPaul Moore static inline void xfrm_garbage_collect(struct net *net) 1207e4c17216SPaul Moore { 1208e4c17216SPaul Moore } 12091da177e4SLinus Torvalds #endif 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds static __inline__ 1212e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) 12131da177e4SLinus Torvalds { 12141da177e4SLinus Torvalds switch (family){ 12151da177e4SLinus Torvalds case AF_INET: 12167e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.daddr; 12171da177e4SLinus Torvalds case AF_INET6: 12187e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.daddr; 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds return NULL; 12211da177e4SLinus Torvalds } 12221da177e4SLinus Torvalds 12231da177e4SLinus Torvalds static __inline__ 1224e8a4e377SDavid S. Miller xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) 12251da177e4SLinus Torvalds { 12261da177e4SLinus Torvalds switch (family){ 12271da177e4SLinus Torvalds case AF_INET: 12287e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip4.saddr; 12291da177e4SLinus Torvalds case AF_INET6: 12307e1dc7b6SDavid S. Miller return (xfrm_address_t *)&fl->u.ip6.saddr; 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds return NULL; 12331da177e4SLinus Torvalds } 12341da177e4SLinus Torvalds 12359bb182a7SYOSHIFUJI Hideaki static __inline__ 1236e8a4e377SDavid S. Miller void xfrm_flowi_addr_get(const struct flowi *fl, 12379bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 12389bb182a7SYOSHIFUJI Hideaki unsigned short family) 12399bb182a7SYOSHIFUJI Hideaki { 12409bb182a7SYOSHIFUJI Hideaki switch(family) { 12419bb182a7SYOSHIFUJI Hideaki case AF_INET: 12427e1dc7b6SDavid S. Miller memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); 12437e1dc7b6SDavid S. Miller memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); 12449bb182a7SYOSHIFUJI Hideaki break; 12459bb182a7SYOSHIFUJI Hideaki case AF_INET6: 124615e318bdSJiri Benc saddr->in6 = fl->u.ip6.saddr; 124715e318bdSJiri Benc daddr->in6 = fl->u.ip6.daddr; 12489bb182a7SYOSHIFUJI Hideaki break; 12499bb182a7SYOSHIFUJI Hideaki } 12509bb182a7SYOSHIFUJI Hideaki } 12519bb182a7SYOSHIFUJI Hideaki 12521da177e4SLinus Torvalds static __inline__ int 1253f8848067SDavid S. Miller __xfrm4_state_addr_check(const struct xfrm_state *x, 1254f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12551da177e4SLinus Torvalds { 12561da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 12571da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 12581da177e4SLinus Torvalds return 1; 12591da177e4SLinus Torvalds return 0; 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds static __inline__ int 1263f8848067SDavid S. Miller __xfrm6_state_addr_check(const struct xfrm_state *x, 1264f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr) 12651da177e4SLinus Torvalds { 1266ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 1267ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || 12681da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 12691da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 12701da177e4SLinus Torvalds return 1; 12711da177e4SLinus Torvalds return 0; 12721da177e4SLinus Torvalds } 12731da177e4SLinus Torvalds 12741da177e4SLinus Torvalds static __inline__ int 1275f8848067SDavid S. Miller xfrm_state_addr_check(const struct xfrm_state *x, 1276f8848067SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 12771da177e4SLinus Torvalds unsigned short family) 12781da177e4SLinus Torvalds { 12791da177e4SLinus Torvalds switch (family) { 12801da177e4SLinus Torvalds case AF_INET: 12811da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12821da177e4SLinus Torvalds case AF_INET6: 12831da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12841da177e4SLinus Torvalds } 12851da177e4SLinus Torvalds return 0; 12861da177e4SLinus Torvalds } 12871da177e4SLinus Torvalds 1288e53820deSMasahide NAKAMURA static __inline__ int 1289f8848067SDavid S. Miller xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, 1290e53820deSMasahide NAKAMURA unsigned short family) 1291e53820deSMasahide NAKAMURA { 1292e53820deSMasahide NAKAMURA switch (family) { 1293e53820deSMasahide NAKAMURA case AF_INET: 1294e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 12957e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.daddr, 12967e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip4.saddr); 1297e53820deSMasahide NAKAMURA case AF_INET6: 1298e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 12997e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.daddr, 13007e1dc7b6SDavid S. Miller (const xfrm_address_t *)&fl->u.ip6.saddr); 1301e53820deSMasahide NAKAMURA } 1302e53820deSMasahide NAKAMURA return 0; 1303e53820deSMasahide NAKAMURA } 1304e53820deSMasahide NAKAMURA 1305f8848067SDavid S. Miller static inline int xfrm_state_kern(const struct xfrm_state *x) 13061da177e4SLinus Torvalds { 13071da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 13081da177e4SLinus Torvalds } 13091da177e4SLinus Torvalds 13105794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 13115794708fSMasahide NAKAMURA { 1312dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1313dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1314dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1315dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 13165794708fSMasahide NAKAMURA } 13175794708fSMasahide NAKAMURA 13181da177e4SLinus Torvalds /* 13191da177e4SLinus Torvalds * xfrm algorithm information 13201da177e4SLinus Torvalds */ 13211a6509d9SHerbert Xu struct xfrm_algo_aead_info { 1322165ecc63SHerbert Xu char *geniv; 13231a6509d9SHerbert Xu u16 icv_truncbits; 13241a6509d9SHerbert Xu }; 13251a6509d9SHerbert Xu 13261da177e4SLinus Torvalds struct xfrm_algo_auth_info { 13271da177e4SLinus Torvalds u16 icv_truncbits; 13281da177e4SLinus Torvalds u16 icv_fullbits; 13291da177e4SLinus Torvalds }; 13301da177e4SLinus Torvalds 13311da177e4SLinus Torvalds struct xfrm_algo_encr_info { 1332165ecc63SHerbert Xu char *geniv; 13331da177e4SLinus Torvalds u16 blockbits; 13341da177e4SLinus Torvalds u16 defkeybits; 13351da177e4SLinus Torvalds }; 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds struct xfrm_algo_comp_info { 13381da177e4SLinus Torvalds u16 threshold; 13391da177e4SLinus Torvalds }; 13401da177e4SLinus Torvalds 13411da177e4SLinus Torvalds struct xfrm_algo_desc { 13421da177e4SLinus Torvalds char *name; 134304ff1260SHerbert Xu char *compat; 13441da177e4SLinus Torvalds u8 available:1; 13457e50f84cSJussi Kivilinna u8 pfkey_supported:1; 13461da177e4SLinus Torvalds union { 13471a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 13481da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 13491da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 13501da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 13511da177e4SLinus Torvalds } uinfo; 13521da177e4SLinus Torvalds struct sadb_alg desc; 13531da177e4SLinus Torvalds }; 13541da177e4SLinus Torvalds 13553328715eSSteffen Klassert /* XFRM protocol handlers. */ 13563328715eSSteffen Klassert struct xfrm4_protocol { 13573328715eSSteffen Klassert int (*handler)(struct sk_buff *skb); 13583328715eSSteffen Klassert int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, 13593328715eSSteffen Klassert int encap_type); 13603328715eSSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13613328715eSSteffen Klassert int (*err_handler)(struct sk_buff *skb, u32 info); 13623328715eSSteffen Klassert 13633328715eSSteffen Klassert struct xfrm4_protocol __rcu *next; 13643328715eSSteffen Klassert int priority; 13653328715eSSteffen Klassert }; 13663328715eSSteffen Klassert 13677e14ea15SSteffen Klassert struct xfrm6_protocol { 13687e14ea15SSteffen Klassert int (*handler)(struct sk_buff *skb); 13697e14ea15SSteffen Klassert int (*cb_handler)(struct sk_buff *skb, int err); 13707e14ea15SSteffen Klassert int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 13717e14ea15SSteffen Klassert u8 type, u8 code, int offset, __be32 info); 13727e14ea15SSteffen Klassert 13737e14ea15SSteffen Klassert struct xfrm6_protocol __rcu *next; 13747e14ea15SSteffen Klassert int priority; 13757e14ea15SSteffen Klassert }; 13767e14ea15SSteffen Klassert 13771da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 13781da177e4SLinus Torvalds struct xfrm_tunnel { 13791da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1380a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1381d2acc347SHerbert Xu 1382b33eab08SEric Dumazet struct xfrm_tunnel __rcu *next; 1383d2acc347SHerbert Xu int priority; 13841da177e4SLinus Torvalds }; 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds struct xfrm6_tunnel { 1387d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1388d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1389d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 13906f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1391d2acc347SHerbert Xu int priority; 13921da177e4SLinus Torvalds }; 13931da177e4SLinus Torvalds 1394d511337aSJoe Perches void xfrm_init(void); 1395d511337aSJoe Perches void xfrm4_init(void); 1396d511337aSJoe Perches int xfrm_state_init(struct net *net); 1397d511337aSJoe Perches void xfrm_state_fini(struct net *net); 1398d511337aSJoe Perches void xfrm4_state_init(void); 13992f32b51bSSteffen Klassert void xfrm4_protocol_init(void); 1400c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1401d511337aSJoe Perches int xfrm6_init(void); 1402d511337aSJoe Perches void xfrm6_fini(void); 1403d511337aSJoe Perches int xfrm6_state_init(void); 1404d511337aSJoe Perches void xfrm6_state_fini(void); 14057e14ea15SSteffen Klassert int xfrm6_protocol_init(void); 14067e14ea15SSteffen Klassert void xfrm6_protocol_fini(void); 1407c35b7e72SDaniel Lezcano #else 1408c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1409c35b7e72SDaniel Lezcano { 1410c35b7e72SDaniel Lezcano return 0; 1411c35b7e72SDaniel Lezcano } 1412c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1413c35b7e72SDaniel Lezcano { 1414c35b7e72SDaniel Lezcano ; 1415c35b7e72SDaniel Lezcano } 1416c35b7e72SDaniel Lezcano #endif 14171da177e4SLinus Torvalds 1418558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1419d511337aSJoe Perches int xfrm_proc_init(struct net *net); 1420d511337aSJoe Perches void xfrm_proc_fini(struct net *net); 1421558f82efSMasahide NAKAMURA #endif 1422558f82efSMasahide NAKAMURA 1423d511337aSJoe Perches int xfrm_sysctl_init(struct net *net); 1424b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1425d511337aSJoe Perches void xfrm_sysctl_fini(struct net *net); 1426b27aeadbSAlexey Dobriyan #else 1427b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1428b27aeadbSAlexey Dobriyan { 1429b27aeadbSAlexey Dobriyan } 1430b27aeadbSAlexey Dobriyan #endif 1431b27aeadbSAlexey Dobriyan 1432d3623099SNicolas Dichtel void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, 1433870a2df4SNicolas Dichtel struct xfrm_address_filter *filter); 1434d511337aSJoe Perches int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 14354c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1436283bc9f3SFan Du void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); 1437d511337aSJoe Perches struct xfrm_state *xfrm_state_alloc(struct net *net); 1438d511337aSJoe Perches struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, 143933765d06SDavid S. Miller const xfrm_address_t *saddr, 1440b520e9f6SDavid S. Miller const struct flowi *fl, 1441b520e9f6SDavid S. Miller struct xfrm_tmpl *tmpl, 14421da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 14431da177e4SLinus Torvalds unsigned short family); 1444d511337aSJoe Perches struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 14455447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1446628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1447628529b6SJamal Hadi Salim unsigned short family, 1448628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 1449c454997eSFan Du struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, 1450c454997eSFan Du unsigned short family); 1451d511337aSJoe Perches int xfrm_state_check_expire(struct xfrm_state *x); 1452d511337aSJoe Perches void xfrm_state_insert(struct xfrm_state *x); 1453d511337aSJoe Perches int xfrm_state_add(struct xfrm_state *x); 1454d511337aSJoe Perches int xfrm_state_update(struct xfrm_state *x); 1455d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1456a70486f0SDavid S. Miller const xfrm_address_t *daddr, __be32 spi, 1457bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1458d511337aSJoe Perches struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1459a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1460a70486f0SDavid S. Miller const xfrm_address_t *saddr, 1461bd55775cSJamal Hadi Salim u8 proto, 1462bd55775cSJamal Hadi Salim unsigned short family); 146341a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1464d511337aSJoe Perches int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 1465283bc9f3SFan Du unsigned short family, struct net *net); 1466d511337aSJoe Perches int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 1467d511337aSJoe Perches unsigned short family); 146841a49cc3SMasahide NAKAMURA #else 146941a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 1470283bc9f3SFan Du int n, unsigned short family, struct net *net) 147141a49cc3SMasahide NAKAMURA { 147241a49cc3SMasahide NAKAMURA return -ENOSYS; 147341a49cc3SMasahide NAKAMURA } 147441a49cc3SMasahide NAKAMURA 147541a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 147641a49cc3SMasahide NAKAMURA int n, unsigned short family) 147741a49cc3SMasahide NAKAMURA { 147841a49cc3SMasahide NAKAMURA return -ENOSYS; 147941a49cc3SMasahide NAKAMURA } 148041a49cc3SMasahide NAKAMURA #endif 1481af11e316SJamal Hadi Salim 1482af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1483af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1484af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1485af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1486af11e316SJamal Hadi Salim }; 1487af11e316SJamal Hadi Salim 14885a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 14895a6d3416SJamal Hadi Salim u32 incnt; 14905a6d3416SJamal Hadi Salim u32 outcnt; 14915a6d3416SJamal Hadi Salim u32 fwdcnt; 14925a6d3416SJamal Hadi Salim u32 inscnt; 14935a6d3416SJamal Hadi Salim u32 outscnt; 14945a6d3416SJamal Hadi Salim u32 fwdscnt; 14955a6d3416SJamal Hadi Salim u32 spdhcnt; 14965a6d3416SJamal Hadi Salim u32 spdhmcnt; 14975a6d3416SJamal Hadi Salim }; 14985a6d3416SJamal Hadi Salim 1499d511337aSJoe Perches struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 1500d511337aSJoe Perches int xfrm_state_delete(struct xfrm_state *x); 15012e71029eSTetsuo Handa int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); 1502d511337aSJoe Perches void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1503d511337aSJoe Perches void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1504d511337aSJoe Perches u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); 1505d511337aSJoe Perches int xfrm_init_replay(struct xfrm_state *x); 1506d511337aSJoe Perches int xfrm_state_mtu(struct xfrm_state *x, int mtu); 1507d511337aSJoe Perches int __xfrm_init_state(struct xfrm_state *x, bool init_replay); 1508d511337aSJoe Perches int xfrm_init_state(struct xfrm_state *x); 1509d511337aSJoe Perches int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1510d511337aSJoe Perches int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); 1511d511337aSJoe Perches int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1512d511337aSJoe Perches int xfrm_output_resume(struct sk_buff *skb, int err); 15137026b1ddSDavid Miller int xfrm_output(struct sock *sk, struct sk_buff *skb); 1514d511337aSJoe Perches int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1515d511337aSJoe Perches void xfrm_local_error(struct sk_buff *skb, int mtu); 1516d511337aSJoe Perches int xfrm4_extract_header(struct sk_buff *skb); 1517d511337aSJoe Perches int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1518d511337aSJoe Perches int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1519716062fdSHerbert Xu int encap_type); 1520d511337aSJoe Perches int xfrm4_transport_finish(struct sk_buff *skb, int async); 1521d511337aSJoe Perches int xfrm4_rcv(struct sk_buff *skb); 1522c4541b41SHerbert Xu 1523c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1524c4541b41SHerbert Xu { 152570be6c91SSteffen Klassert XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; 15263328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->family = AF_INET; 15273328715eSSteffen Klassert XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); 15283328715eSSteffen Klassert return xfrm_input(skb, nexthdr, spi, 0); 1529c4541b41SHerbert Xu } 1530c4541b41SHerbert Xu 1531d511337aSJoe Perches int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1532d511337aSJoe Perches int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1533ede2059dSEric W. Biederman int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); 15347026b1ddSDavid Miller int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); 15353328715eSSteffen Klassert int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15363328715eSSteffen Klassert int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); 15373328715eSSteffen Klassert int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); 1538d511337aSJoe Perches int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1539d511337aSJoe Perches int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 1540d511337aSJoe Perches void xfrm4_local_error(struct sk_buff *skb, u32 mtu); 1541d511337aSJoe Perches int xfrm6_extract_header(struct sk_buff *skb); 1542d511337aSJoe Perches int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 154363c43787SNicolas Dichtel int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, 154463c43787SNicolas Dichtel struct ip6_tnl *t); 1545d511337aSJoe Perches int xfrm6_transport_finish(struct sk_buff *skb, int async); 154663c43787SNicolas Dichtel int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); 1547d511337aSJoe Perches int xfrm6_rcv(struct sk_buff *skb); 1548d511337aSJoe Perches int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1549fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 15507b77d161SDavid S. Miller void xfrm6_local_error(struct sk_buff *skb, u32 mtu); 15517e14ea15SSteffen Klassert int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); 15527e14ea15SSteffen Klassert int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); 15537e14ea15SSteffen Klassert int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); 1554d511337aSJoe Perches int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 15557b77d161SDavid S. Miller int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1556d511337aSJoe Perches __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1557d511337aSJoe Perches __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); 1558d511337aSJoe Perches int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 1559d511337aSJoe Perches int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 1560ede2059dSEric W. Biederman int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); 15617026b1ddSDavid Miller int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); 1562d511337aSJoe Perches int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1563aee5adb4SMasahide NAKAMURA u8 **prevhdr); 15641da177e4SLinus Torvalds 15651da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1566d511337aSJoe Perches int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 1567d511337aSJoe Perches int xfrm_user_policy(struct sock *sk, int optname, 1568d511337aSJoe Perches u8 __user *optval, int optlen); 15691da177e4SLinus Torvalds #else 15701da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 15711da177e4SLinus Torvalds { 15721da177e4SLinus Torvalds return -ENOPROTOOPT; 15731da177e4SLinus Torvalds } 15741da177e4SLinus Torvalds 1575067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 15761da177e4SLinus Torvalds { 15771da177e4SLinus Torvalds /* should not happen */ 15781da177e4SLinus Torvalds kfree_skb(skb); 15791da177e4SLinus Torvalds return 0; 15801da177e4SLinus Torvalds } 15811da177e4SLinus Torvalds #endif 15821da177e4SLinus Torvalds 15830331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 15844c563f76STimo Teras 1585d511337aSJoe Perches void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1586d511337aSJoe Perches int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 1587d511337aSJoe Perches int (*func)(struct xfrm_policy *, int, int, void*), 1588d511337aSJoe Perches void *); 1589283bc9f3SFan Du void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); 15901da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 15918ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 15928ca2e93bSJamal Hadi Salim u8 type, int dir, 15934e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1594ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1595ef41aaa0SEric Paris int *err); 1596d511337aSJoe Perches struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, 1597d511337aSJoe Perches u32 id, int delete, int *err); 15982e71029eSTetsuo Handa int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); 1599880a6fabSChristophe Gouault void xfrm_policy_hash_rebuild(struct net *net); 16001da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1601776e9dd9SFan Du int verify_spi_info(u8 proto, u32 min, u32 max); 1602d511337aSJoe Perches int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1603e473fcb4SMathias Krause struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, 1604bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1605a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1606a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create, 1607bd55775cSJamal Hadi Salim unsigned short family); 1608d511337aSJoe Perches int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 16091da177e4SLinus Torvalds 161080c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1611d511337aSJoe Perches int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1612183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_bundles, 1613183cad12SDavid S. Miller const struct xfrm_kmaddress *k); 1614283bc9f3SFan Du struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); 1615d511337aSJoe Perches struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, 161680c9abaaSShinta Sugimoto struct xfrm_migrate *m); 1617d511337aSJoe Perches int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 161813c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 16198d549c4fSFan Du struct xfrm_kmaddress *k, struct net *net); 162080c9abaaSShinta Sugimoto #endif 162180c9abaaSShinta Sugimoto 1622d511337aSJoe Perches int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 1623d511337aSJoe Perches void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); 1624d511337aSJoe Perches int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, 1625d511337aSJoe Perches xfrm_address_t *addr); 16261da177e4SLinus Torvalds 1627d511337aSJoe Perches void xfrm_input_init(void); 1628d511337aSJoe Perches int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 16291da177e4SLinus Torvalds 1630d511337aSJoe Perches void xfrm_probe_algs(void); 1631d511337aSJoe Perches int xfrm_count_pfkey_auth_supported(void); 1632d511337aSJoe Perches int xfrm_count_pfkey_enc_supported(void); 1633d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 1634d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 1635d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 1636d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 1637d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 1638d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); 1639d511337aSJoe Perches struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); 1640d511337aSJoe Perches struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); 1641d511337aSJoe Perches struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, 16421a6509d9SHerbert Xu int probe); 16431da177e4SLinus Torvalds 1644ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm6_addr_equal(const xfrm_address_t *a, 1645ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b) 1646ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 { 1647ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_equal((const struct in6_addr *)a, 1648ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 (const struct in6_addr *)b); 1649ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 } 1650ff88b30cSYOSHIFUJI Hideaki / 吉藤英明 165170e94e66SYOSHIFUJI Hideaki / 吉藤英明 static inline bool xfrm_addr_equal(const xfrm_address_t *a, 165270e94e66SYOSHIFUJI Hideaki / 吉藤英明 const xfrm_address_t *b, 165370e94e66SYOSHIFUJI Hideaki / 吉藤英明 sa_family_t family) 165470e94e66SYOSHIFUJI Hideaki / 吉藤英明 { 165570e94e66SYOSHIFUJI Hideaki / 吉藤英明 switch (family) { 165670e94e66SYOSHIFUJI Hideaki / 吉藤英明 default: 165770e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET: 165870e94e66SYOSHIFUJI Hideaki / 吉藤英明 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; 165970e94e66SYOSHIFUJI Hideaki / 吉藤英明 case AF_INET6: 166070e94e66SYOSHIFUJI Hideaki / 吉藤英明 return xfrm6_addr_equal(a, b); 166170e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 166270e94e66SYOSHIFUJI Hideaki / 吉藤英明 } 166370e94e66SYOSHIFUJI Hideaki / 吉藤英明 166477d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 166577d8d7a6SHerbert Xu { 166677d8d7a6SHerbert Xu return index & 7; 166777d8d7a6SHerbert Xu } 166877d8d7a6SHerbert Xu 1669a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1670a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1671f8cd5488SJamal Hadi Salim { 1672be33690dSPatrick McHardy struct sock *nlsk; 1673be33690dSPatrick McHardy int ret = 0; 1674be33690dSPatrick McHardy 1675be33690dSPatrick McHardy rcu_read_lock(); 1676a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1677be33690dSPatrick McHardy if (nlsk) 1678be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1679be33690dSPatrick McHardy rcu_read_unlock(); 1680be33690dSPatrick McHardy return ret; 1681f8cd5488SJamal Hadi Salim } 16820f24558eSHoria Geanta 16830f24558eSHoria Geanta static inline int xfrm_acquire_is_on(struct net *net) 16840f24558eSHoria Geanta { 16850f24558eSHoria Geanta struct sock *nlsk; 16860f24558eSHoria Geanta int ret = 0; 16870f24558eSHoria Geanta 16880f24558eSHoria Geanta rcu_read_lock(); 16890f24558eSHoria Geanta nlsk = rcu_dereference(net->xfrm.nlsk); 16900f24558eSHoria Geanta if (nlsk) 16910f24558eSHoria Geanta ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); 16920f24558eSHoria Geanta rcu_read_unlock(); 16930f24558eSHoria Geanta 16940f24558eSHoria Geanta return ret; 16950f24558eSHoria Geanta } 1696a6483b79SAlexey Dobriyan #endif 1697f8cd5488SJamal Hadi Salim 1698ee5c2317SSteffen Klassert static inline int aead_len(struct xfrm_algo_aead *alg) 1699ee5c2317SSteffen Klassert { 1700ee5c2317SSteffen Klassert return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 1701ee5c2317SSteffen Klassert } 1702ee5c2317SSteffen Klassert 170385158621SDavid S. Miller static inline int xfrm_alg_len(const struct xfrm_algo *alg) 17040f99be0dSEric Dumazet { 17050f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17060f99be0dSEric Dumazet } 17070f99be0dSEric Dumazet 170885158621SDavid S. Miller static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) 17094447bb33SMartin Willi { 17104447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 17114447bb33SMartin Willi } 17124447bb33SMartin Willi 17139736acf3SSteffen Klassert static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) 17149736acf3SSteffen Klassert { 17159736acf3SSteffen Klassert return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); 17169736acf3SSteffen Klassert } 17179736acf3SSteffen Klassert 171880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 1719af2f464eSSteffen Klassert static inline int xfrm_replay_clone(struct xfrm_state *x, 1720af2f464eSSteffen Klassert struct xfrm_state *orig) 1721af2f464eSSteffen Klassert { 1722af2f464eSSteffen Klassert x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), 1723af2f464eSSteffen Klassert GFP_KERNEL); 1724af2f464eSSteffen Klassert if (!x->replay_esn) 1725af2f464eSSteffen Klassert return -ENOMEM; 1726af2f464eSSteffen Klassert 1727af2f464eSSteffen Klassert x->replay_esn->bmp_len = orig->replay_esn->bmp_len; 1728af2f464eSSteffen Klassert x->replay_esn->replay_window = orig->replay_esn->replay_window; 1729af2f464eSSteffen Klassert 1730af2f464eSSteffen Klassert x->preplay_esn = kmemdup(x->replay_esn, 1731af2f464eSSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 1732af2f464eSSteffen Klassert GFP_KERNEL); 1733af2f464eSSteffen Klassert if (!x->preplay_esn) { 1734af2f464eSSteffen Klassert kfree(x->replay_esn); 1735af2f464eSSteffen Klassert return -ENOMEM; 1736af2f464eSSteffen Klassert } 1737af2f464eSSteffen Klassert 1738af2f464eSSteffen Klassert return 0; 1739af2f464eSSteffen Klassert } 1740af2f464eSSteffen Klassert 1741ee5c2317SSteffen Klassert static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) 1742ee5c2317SSteffen Klassert { 1743ee5c2317SSteffen Klassert return kmemdup(orig, aead_len(orig), GFP_KERNEL); 1744ee5c2317SSteffen Klassert } 1745ee5c2317SSteffen Klassert 1746ee5c2317SSteffen Klassert 174780c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 174880c9abaaSShinta Sugimoto { 17490f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 175080c9abaaSShinta Sugimoto } 175180c9abaaSShinta Sugimoto 17524447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 17534447bb33SMartin Willi { 17544447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 17554447bb33SMartin Willi } 17564447bb33SMartin Willi 175780c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 175880c9abaaSShinta Sugimoto { 175980c9abaaSShinta Sugimoto int i; 176080c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 176180c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 176280c9abaaSShinta Sugimoto } 176380c9abaaSShinta Sugimoto 176480c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 176580c9abaaSShinta Sugimoto { 176680c9abaaSShinta Sugimoto int i; 176780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 176880c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 176980c9abaaSShinta Sugimoto } 177080c9abaaSShinta Sugimoto #endif 1771f8cd5488SJamal Hadi Salim 1772def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 177300501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 177400501121SHerbert Xu { 177500501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 177600501121SHerbert Xu } 1777def8b4faSAlexey Dobriyan #endif 177800501121SHerbert Xu 1779bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1780bf825f81SJamal Hadi Salim { 1781bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 17824efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1783bf825f81SJamal Hadi Salim else 1784bf825f81SJamal Hadi Salim m->v = m->m = 0; 1785bf825f81SJamal Hadi Salim 1786bf825f81SJamal Hadi Salim return m->v & m->m; 1787bf825f81SJamal Hadi Salim } 1788bf825f81SJamal Hadi Salim 1789e3dfa389SDavid S. Miller static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) 1790bf825f81SJamal Hadi Salim { 17911d1e34ddSDavid S. Miller int ret = 0; 1792bf825f81SJamal Hadi Salim 17931d1e34ddSDavid S. Miller if (m->m | m->v) 17941d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 17951d1e34ddSDavid S. Miller return ret; 1796bf825f81SJamal Hadi Salim } 1797bf825f81SJamal Hadi Salim 179870be6c91SSteffen Klassert static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, 179970be6c91SSteffen Klassert unsigned int family) 180070be6c91SSteffen Klassert { 180170be6c91SSteffen Klassert bool tunnel = false; 180270be6c91SSteffen Klassert 180370be6c91SSteffen Klassert switch(family) { 180470be6c91SSteffen Klassert case AF_INET: 180570be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) 180670be6c91SSteffen Klassert tunnel = true; 180770be6c91SSteffen Klassert break; 180870be6c91SSteffen Klassert case AF_INET6: 180970be6c91SSteffen Klassert if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) 181070be6c91SSteffen Klassert tunnel = true; 181170be6c91SSteffen Klassert break; 181270be6c91SSteffen Klassert } 181370be6c91SSteffen Klassert if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) 181470be6c91SSteffen Klassert return -EINVAL; 181570be6c91SSteffen Klassert 181670be6c91SSteffen Klassert return 0; 181770be6c91SSteffen Klassert } 18181da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1819