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> 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <net/sock.h> 171da177e4SLinus Torvalds #include <net/dst.h> 18436a0a40SHerbert Xu #include <net/ip.h> 191da177e4SLinus Torvalds #include <net/route.h> 201da177e4SLinus Torvalds #include <net/ipv6.h> 211da177e4SLinus Torvalds #include <net/ip6_fib.h> 22558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 23558f82efSMasahide NAKAMURA #include <net/snmp.h> 24558f82efSMasahide NAKAMURA #endif 251da177e4SLinus Torvalds 26d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 27d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 28d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 29d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 30d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 31d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 32d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 33d3d6dd3aSMasahide NAKAMURA 341da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 35b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 36b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 37d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 38d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 391da177e4SLinus Torvalds 40558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 41558f82efSMasahide NAKAMURA DECLARE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics); 42558f82efSMasahide NAKAMURA #define XFRM_INC_STATS(field) SNMP_INC_STATS(xfrm_statistics, field) 43558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_BH(field) SNMP_INC_STATS_BH(xfrm_statistics, field) 44558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_USER(field) SNMP_INC_STATS_USER(xfrm_statistics, field) 45558f82efSMasahide NAKAMURA #else 46558f82efSMasahide NAKAMURA #define XFRM_INC_STATS(field) 47558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_BH(field) 48558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_USER(field) 49558f82efSMasahide NAKAMURA #endif 50558f82efSMasahide NAKAMURA 51f8cd5488SJamal Hadi Salim extern struct sock *xfrm_nl; 52f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_etime; 53f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_rseqth; 54a37ae408SPavel Emelyanov extern int sysctl_xfrm_larval_drop; 55a37ae408SPavel Emelyanov extern u32 sysctl_xfrm_acq_expires; 56f8cd5488SJamal Hadi Salim 574a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 601da177e4SLinus Torvalds ------------------------------------ 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds Basic objects: 631da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 641da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 651da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 661da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 691da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 701da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 711da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 761da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 771da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 781da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 791da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 801da177e4SLinus Torvalds to a dst_entry returned to requestor. 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 831da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 841da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 851da177e4SLinus Torvalds |---. child .-> NULL 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds Resolution of xrfm_tmpl 911da177e4SLinus Torvalds ----------------------- 921da177e4SLinus Torvalds Template contains: 931da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 941da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 951da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 961da177e4SLinus Torvalds Q: allow to resolve security gateway? 971da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 981da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 991da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 1001da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 1011da177e4SLinus Torvalds 7. ->share Sharing mode. 1021da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1031da177e4SLinus Torvalds flow id? 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1061da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1071da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds PROBLEMS: 1101da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1111da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1121da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1131da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1141da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1151da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1161da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1171da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1181da177e4SLinus Torvalds */ 1191da177e4SLinus Torvalds 12012a169e7SHerbert Xu struct xfrm_state_walk { 12112a169e7SHerbert Xu struct list_head all; 12212a169e7SHerbert Xu u8 state; 12312a169e7SHerbert Xu union { 12412a169e7SHerbert Xu u8 dying; 12512a169e7SHerbert Xu u8 proto; 12612a169e7SHerbert Xu }; 12712a169e7SHerbert Xu u32 seq; 12812a169e7SHerbert Xu }; 12912a169e7SHerbert Xu 1301da177e4SLinus Torvalds /* Full description of state of transformer. */ 1311da177e4SLinus Torvalds struct xfrm_state 1321da177e4SLinus Torvalds { 133673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 134673c09beSAlexey Dobriyan struct net *xs_net; 135673c09beSAlexey Dobriyan #endif 136abb81c4fSHerbert Xu union { 13712a169e7SHerbert Xu struct hlist_node gclist; 1388f126e37SDavid S. Miller struct hlist_node bydst; 139abb81c4fSHerbert Xu }; 1408f126e37SDavid S. Miller struct hlist_node bysrc; 1418f126e37SDavid S. Miller struct hlist_node byspi; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds atomic_t refcnt; 1441da177e4SLinus Torvalds spinlock_t lock; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds struct xfrm_id id; 1471da177e4SLinus Torvalds struct xfrm_selector sel; 1481da177e4SLinus Torvalds 1499d4a706dSDavid S. Miller u32 genid; 1509d4a706dSDavid S. Miller 15112a169e7SHerbert Xu /* Key manager bits */ 15212a169e7SHerbert Xu struct xfrm_state_walk km; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds /* Parameters of this state. */ 1551da177e4SLinus Torvalds struct { 1561da177e4SLinus Torvalds u32 reqid; 1571da177e4SLinus Torvalds u8 mode; 1581da177e4SLinus Torvalds u8 replay_window; 1591da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1601da177e4SLinus Torvalds u8 flags; 1611da177e4SLinus Torvalds u16 family; 1621da177e4SLinus Torvalds xfrm_address_t saddr; 1631da177e4SLinus Torvalds int header_len; 1641da177e4SLinus Torvalds int trailer_len; 1651da177e4SLinus Torvalds } props; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* Data for transformer */ 1701da177e4SLinus Torvalds struct xfrm_algo *aalg; 1711da177e4SLinus Torvalds struct xfrm_algo *ealg; 1721da177e4SLinus Torvalds struct xfrm_algo *calg; 1731a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds /* Data for encapsulator */ 1761da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1771da177e4SLinus Torvalds 178060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 179060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 180060f02a3SNoriaki TAKAMIYA 1811da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1821da177e4SLinus Torvalds struct xfrm_state *tunnel; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1851da177e4SLinus Torvalds atomic_t tunnel_users; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds /* State for replay detection */ 1881da177e4SLinus Torvalds struct xfrm_replay_state replay; 1891da177e4SLinus Torvalds 190f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 191f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 192f8cd5488SJamal Hadi Salim 1932717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1942717096aSJamal Hadi Salim * moment 1952717096aSJamal Hadi Salim */ 1962717096aSJamal Hadi Salim u32 xflags; 1972717096aSJamal Hadi Salim 198f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 199f8cd5488SJamal Hadi Salim u32 replay_maxage; 200f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 201f8cd5488SJamal Hadi Salim 202f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 203f8cd5488SJamal Hadi Salim struct timer_list rtimer; 204f8cd5488SJamal Hadi Salim 2051da177e4SLinus Torvalds /* Statistics */ 2061da177e4SLinus Torvalds struct xfrm_stats stats; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2091da177e4SLinus Torvalds struct timer_list timer; 2101da177e4SLinus Torvalds 2119afaca05SMasahide NAKAMURA /* Last used time */ 212d26f3984SHerbert Xu unsigned long lastused; 2139afaca05SMasahide NAKAMURA 2141da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2151da177e4SLinus Torvalds * transformer. */ 216533cb5b0SEric Dumazet const struct xfrm_type *type; 21713996378SHerbert Xu struct xfrm_mode *inner_mode; 218df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 21913996378SHerbert Xu struct xfrm_mode *outer_mode; 2201da177e4SLinus Torvalds 221df71837dSTrent Jaeger /* Security context */ 222df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 223df71837dSTrent Jaeger 2241da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2251da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2261da177e4SLinus Torvalds void *data; 2271da177e4SLinus Torvalds }; 2281da177e4SLinus Torvalds 229673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 230673c09beSAlexey Dobriyan { 231673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 232673c09beSAlexey Dobriyan } 233673c09beSAlexey Dobriyan 2342717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2352717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2362717096aSJamal Hadi Salim 2371da177e4SLinus Torvalds enum { 2381da177e4SLinus Torvalds XFRM_STATE_VOID, 2391da177e4SLinus Torvalds XFRM_STATE_ACQ, 2401da177e4SLinus Torvalds XFRM_STATE_VALID, 2411da177e4SLinus Torvalds XFRM_STATE_ERROR, 2421da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2431da177e4SLinus Torvalds XFRM_STATE_DEAD 2441da177e4SLinus Torvalds }; 2451da177e4SLinus Torvalds 24626b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 24726b15dadSJamal Hadi Salim struct km_event 24826b15dadSJamal Hadi Salim { 249bf08867fSHerbert Xu union { 250bf08867fSHerbert Xu u32 hard; 251bf08867fSHerbert Xu u32 proto; 252bf08867fSHerbert Xu u32 byid; 253f8cd5488SJamal Hadi Salim u32 aevent; 254f7b6983fSMasahide NAKAMURA u32 type; 255bf08867fSHerbert Xu } data; 256bf08867fSHerbert Xu 25726b15dadSJamal Hadi Salim u32 seq; 25826b15dadSJamal Hadi Salim u32 pid; 25926b15dadSJamal Hadi Salim u32 event; 26026b15dadSJamal Hadi Salim }; 26126b15dadSJamal Hadi Salim 26225ee3286SHerbert Xu struct net_device; 2631da177e4SLinus Torvalds struct xfrm_type; 2641da177e4SLinus Torvalds struct xfrm_dst; 2651da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2661da177e4SLinus Torvalds unsigned short family; 2671da177e4SLinus Torvalds struct dst_ops *dst_ops; 2681da177e4SLinus Torvalds void (*garbage_collect)(void); 26966cdb3caSHerbert Xu struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, 27066cdb3caSHerbert Xu xfrm_address_t *daddr); 271a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2721da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2731da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 274d5422efeSHerbert Xu struct flowi *fl, 275d5422efeSHerbert Xu int reverse); 27625ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 277a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 278a1b05140SMasahide NAKAMURA struct dst_entry *dst, 279a1b05140SMasahide NAKAMURA int nfheader_len); 28025ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 28125ee3286SHerbert Xu struct net_device *dev); 2821da177e4SLinus Torvalds }; 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2851da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 28626b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 28726b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds struct xfrm_tmpl; 290980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29153bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29253bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29353bc6b4dSJamal Hadi Salim 2941da177e4SLinus Torvalds struct xfrm_state_afinfo { 29517c2a42aSHerbert Xu unsigned int family; 29636cf9acfSHerbert Xu unsigned int proto; 2978e3d716cSAl Viro __be16 eth_proto; 29817c2a42aSHerbert Xu struct module *owner; 299533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 300aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 301d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 3021da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 3031da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 3041da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 30541a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 30641a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 307cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 308227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 309227620e2SHerbert Xu struct sk_buff *skb); 31036cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31136cf9acfSHerbert Xu struct sk_buff *skb); 312716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 313716062fdSHerbert Xu int async); 3141da177e4SLinus Torvalds }; 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3171da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds struct xfrm_type 3221da177e4SLinus Torvalds { 3231da177e4SLinus Torvalds char *description; 3241da177e4SLinus Torvalds struct module *owner; 3251da177e4SLinus Torvalds __u8 proto; 3261b5c2299SMasahide NAKAMURA __u8 flags; 3271b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 328436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 329f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 330f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3311da177e4SLinus Torvalds 33272cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3331da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 334e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3351da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 336df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 337aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3381da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 339c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3401da177e4SLinus Torvalds }; 3411da177e4SLinus Torvalds 342533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 343533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3441da177e4SLinus Torvalds 345b59f45d0SHerbert Xu struct xfrm_mode { 346227620e2SHerbert Xu /* 347227620e2SHerbert Xu * Remove encapsulation header. 348227620e2SHerbert Xu * 349227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 350227620e2SHerbert Xu * header. 351227620e2SHerbert Xu * 352227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 353227620e2SHerbert Xu * should be and the network header shall be set to where the IP 354227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 355227620e2SHerbert Xu * payload. 356227620e2SHerbert Xu */ 357227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 358227620e2SHerbert Xu 359227620e2SHerbert Xu /* 360227620e2SHerbert Xu * This is the actual input entry point. 361227620e2SHerbert Xu * 362227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 363227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 364227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 365227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 366227620e2SHerbert Xu */ 367b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 36837fedd3aSHerbert Xu 36937fedd3aSHerbert Xu /* 37037fedd3aSHerbert Xu * Add encapsulation header. 37137fedd3aSHerbert Xu * 37237fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37337fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37437fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 37537fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 37637fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 37737fedd3aSHerbert Xu * header. The value of the network header will always point 37837fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 37937fedd3aSHerbert Xu */ 38036cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38136cf9acfSHerbert Xu 38236cf9acfSHerbert Xu /* 38336cf9acfSHerbert Xu * This is the actual output entry point. 38436cf9acfSHerbert Xu * 38536cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 38636cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 38736cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 38836cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 38936cf9acfSHerbert Xu * call output2. 39036cf9acfSHerbert Xu */ 391eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 392b59f45d0SHerbert Xu 39317c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 394b59f45d0SHerbert Xu struct module *owner; 395b59f45d0SHerbert Xu unsigned int encap; 3961bfcb10fSHerbert Xu int flags; 3971bfcb10fSHerbert Xu }; 3981bfcb10fSHerbert Xu 3991bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4001bfcb10fSHerbert Xu enum { 4011bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 402b59f45d0SHerbert Xu }; 403b59f45d0SHerbert Xu 404b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 405b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 406b59f45d0SHerbert Xu 407df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 408df9dcb45SKazunori MIYAZAWA { 409df9dcb45SKazunori MIYAZAWA switch(family) { 410df9dcb45SKazunori MIYAZAWA case AF_INET: 411df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 412df9dcb45SKazunori MIYAZAWA case AF_INET6: 413df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 414df9dcb45SKazunori MIYAZAWA default: 415df9dcb45SKazunori MIYAZAWA return 0; 416df9dcb45SKazunori MIYAZAWA } 417df9dcb45SKazunori MIYAZAWA } 418df9dcb45SKazunori MIYAZAWA 419df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 420df9dcb45SKazunori MIYAZAWA { 421df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 422df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 423df9dcb45SKazunori MIYAZAWA return x->inner_mode; 424df9dcb45SKazunori MIYAZAWA else 425df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 426df9dcb45SKazunori MIYAZAWA } 427df9dcb45SKazunori MIYAZAWA 4281da177e4SLinus Torvalds struct xfrm_tmpl 4291da177e4SLinus Torvalds { 4301da177e4SLinus Torvalds /* id in template is interpreted as: 4311da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4321da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4331da177e4SLinus Torvalds * daddr must be fixed too. 4341da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4351da177e4SLinus Torvalds */ 4361da177e4SLinus Torvalds struct xfrm_id id; 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4391da177e4SLinus Torvalds xfrm_address_t saddr; 4401da177e4SLinus Torvalds 44176b3f055SMiika Komu unsigned short encap_family; 44276b3f055SMiika Komu 4431da177e4SLinus Torvalds __u32 reqid; 4441da177e4SLinus Torvalds 4457e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 4461da177e4SLinus Torvalds __u8 mode; 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 4491da177e4SLinus Torvalds __u8 share; 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 4521da177e4SLinus Torvalds __u8 optional; 4531da177e4SLinus Torvalds 454c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 455c5d18e98SHerbert Xu __u8 allalgs; 456c5d18e98SHerbert Xu 4571da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 4581da177e4SLinus Torvalds __u32 aalgos; 4591da177e4SLinus Torvalds __u32 ealgos; 4601da177e4SLinus Torvalds __u32 calgos; 4611da177e4SLinus Torvalds }; 4621da177e4SLinus Torvalds 463622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4641da177e4SLinus Torvalds 46512a169e7SHerbert Xu struct xfrm_policy_walk_entry { 46612a169e7SHerbert Xu struct list_head all; 46712a169e7SHerbert Xu u8 dead; 46812a169e7SHerbert Xu }; 46912a169e7SHerbert Xu 47012a169e7SHerbert Xu struct xfrm_policy_walk { 47112a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47212a169e7SHerbert Xu u8 type; 47312a169e7SHerbert Xu u32 seq; 47412a169e7SHerbert Xu }; 47512a169e7SHerbert Xu 4761da177e4SLinus Torvalds struct xfrm_policy 4771da177e4SLinus Torvalds { 4780331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4790331b1f3SAlexey Dobriyan struct net *xp_net; 4800331b1f3SAlexey Dobriyan #endif 4812518c7c2SDavid S. Miller struct hlist_node bydst; 4822518c7c2SDavid S. Miller struct hlist_node byidx; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4851da177e4SLinus Torvalds rwlock_t lock; 4861da177e4SLinus Torvalds atomic_t refcnt; 4871da177e4SLinus Torvalds struct timer_list timer; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds u32 priority; 4901da177e4SLinus Torvalds u32 index; 4911da177e4SLinus Torvalds struct xfrm_selector selector; 4921da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4931da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 4941da177e4SLinus Torvalds struct dst_entry *bundles; 49512a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49646ca5f5dSArnaldo Carvalho de Melo u8 type; 49746ca5f5dSArnaldo Carvalho de Melo u8 action; 49846ca5f5dSArnaldo Carvalho de Melo u8 flags; 49946ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 50012a169e7SHerbert Xu u16 family; 501df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5021da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5031da177e4SLinus Torvalds }; 5041da177e4SLinus Torvalds 5050331b1f3SAlexey Dobriyan static inline struct net *xp_net(struct xfrm_policy *xp) 5060331b1f3SAlexey Dobriyan { 5070331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5080331b1f3SAlexey Dobriyan } 5090331b1f3SAlexey Dobriyan 51013c1d189SArnaud Ebalard struct xfrm_kmaddress { 51113c1d189SArnaud Ebalard xfrm_address_t local; 51213c1d189SArnaud Ebalard xfrm_address_t remote; 51313c1d189SArnaud Ebalard u32 reserved; 51413c1d189SArnaud Ebalard u16 family; 51513c1d189SArnaud Ebalard }; 51613c1d189SArnaud Ebalard 51780c9abaaSShinta Sugimoto struct xfrm_migrate { 51880c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 51980c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 52080c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52180c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52280c9abaaSShinta Sugimoto u8 proto; 52380c9abaaSShinta Sugimoto u8 mode; 52480c9abaaSShinta Sugimoto u16 reserved; 52580c9abaaSShinta Sugimoto u32 reqid; 52680c9abaaSShinta Sugimoto u16 old_family; 52780c9abaaSShinta Sugimoto u16 new_family; 52880c9abaaSShinta Sugimoto }; 52980c9abaaSShinta Sugimoto 5301da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 531f8cd5488SJamal Hadi Salim /* which seqno */ 532f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 533f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 534f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 535f8cd5488SJamal Hadi Salim /* what happened */ 536f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 537f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 538f8cd5488SJamal Hadi Salim 539f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 540f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 541f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 542f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 543f8cd5488SJamal Hadi Salim /* default seq threshold size */ 544f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5451da177e4SLinus Torvalds 5461da177e4SLinus Torvalds struct xfrm_mgr 5471da177e4SLinus Torvalds { 5481da177e4SLinus Torvalds struct list_head list; 5491da177e4SLinus Torvalds char *id; 55026b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 5511da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 552cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5535d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 55426b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 55597a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 55613c1d189SArnaud Ebalard int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); 5571da177e4SLinus Torvalds }; 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5601da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5611da177e4SLinus Torvalds 5622518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 5631da177e4SLinus Torvalds 564436a0a40SHerbert Xu /* 565436a0a40SHerbert Xu * This structure is used for the duration where packets are being 566436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 567436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 568436a0a40SHerbert Xu */ 569436a0a40SHerbert Xu struct xfrm_skb_cb { 570436a0a40SHerbert Xu union { 571436a0a40SHerbert Xu struct inet_skb_parm h4; 572436a0a40SHerbert Xu struct inet6_skb_parm h6; 573436a0a40SHerbert Xu } header; 574436a0a40SHerbert Xu 575436a0a40SHerbert Xu /* Sequence number for replay protection. */ 576b318e0e4SHerbert Xu union { 577b318e0e4SHerbert Xu u64 output; 578b318e0e4SHerbert Xu __be32 input; 579b318e0e4SHerbert Xu } seq; 580436a0a40SHerbert Xu }; 581436a0a40SHerbert Xu 582436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 583436a0a40SHerbert Xu 58436cf9acfSHerbert Xu /* 58536cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 58636cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 58736cf9acfSHerbert Xu */ 58836cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 58936cf9acfSHerbert Xu union { 59036cf9acfSHerbert Xu struct inet_skb_parm h4; 59136cf9acfSHerbert Xu struct inet6_skb_parm h6; 59236cf9acfSHerbert Xu } header; 59336cf9acfSHerbert Xu 59436cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 59536cf9acfSHerbert Xu __be16 id; 59636cf9acfSHerbert Xu __be16 frag_off; 59736cf9acfSHerbert Xu 598732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 599732c8bd5SHerbert Xu u8 ihl; 600732c8bd5SHerbert Xu 60136cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 60236cf9acfSHerbert Xu u8 tos; 60336cf9acfSHerbert Xu 60436cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 60536cf9acfSHerbert Xu u8 ttl; 60636cf9acfSHerbert Xu 60736cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 60836cf9acfSHerbert Xu u8 protocol; 60936cf9acfSHerbert Xu 610732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 611732c8bd5SHerbert Xu u8 optlen; 612732c8bd5SHerbert Xu 61336cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 61436cf9acfSHerbert Xu u8 flow_lbl[3]; 61536cf9acfSHerbert Xu }; 61636cf9acfSHerbert Xu 61736cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 61836cf9acfSHerbert Xu 619716062fdSHerbert Xu /* 620716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 621716062fdSHerbert Xu * related information. 622716062fdSHerbert Xu */ 623716062fdSHerbert Xu struct xfrm_spi_skb_cb { 624716062fdSHerbert Xu union { 625716062fdSHerbert Xu struct inet_skb_parm h4; 626716062fdSHerbert Xu struct inet6_skb_parm h6; 627716062fdSHerbert Xu } header; 628716062fdSHerbert Xu 629716062fdSHerbert Xu unsigned int daddroff; 6302fcb45b6SHerbert Xu unsigned int family; 631716062fdSHerbert Xu }; 632716062fdSHerbert Xu 633716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 634716062fdSHerbert Xu 635161a09e7SJoy Latten /* Audit Information */ 636161a09e7SJoy Latten struct xfrm_audit 637161a09e7SJoy Latten { 638161a09e7SJoy Latten u32 secid; 6392532386fSEric Paris uid_t loginuid; 6402532386fSEric Paris u32 sessionid; 641161a09e7SJoy Latten }; 642c9204d9cSJoy Latten 643c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 644afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 645ab5f5e8bSJoy Latten { 646ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 647ab5f5e8bSJoy Latten 648afeb14b4SPaul Moore if (audit_enabled == 0) 649afeb14b4SPaul Moore return NULL; 650ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 651ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 652ab5f5e8bSJoy Latten if (audit_buf == NULL) 653ab5f5e8bSJoy Latten return NULL; 654afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 655afeb14b4SPaul Moore return audit_buf; 656afeb14b4SPaul Moore } 657afeb14b4SPaul Moore 6582532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 659afeb14b4SPaul Moore struct audit_buffer *audit_buf) 660afeb14b4SPaul Moore { 661afeb14b4SPaul Moore char *secctx; 662afeb14b4SPaul Moore u32 secctx_len; 663ab5f5e8bSJoy Latten 6642532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 66568277accSPaul Moore if (secid != 0 && 66668277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 667ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 668ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 669ab5f5e8bSJoy Latten } else 670ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 671ab5f5e8bSJoy Latten } 672ab5f5e8bSJoy Latten 673ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6742532386fSEric Paris u32 auid, u32 ses, u32 secid); 675ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6762532386fSEric Paris u32 auid, u32 ses, u32 secid); 677ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6782532386fSEric Paris u32 auid, u32 ses, u32 secid); 679ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6802532386fSEric Paris u32 auid, u32 ses, u32 secid); 681afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 682afeb14b4SPaul Moore struct sk_buff *skb); 683afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 684afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 685afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 686afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 687afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 688c9204d9cSJoy Latten #else 68941fef0eeSMarcin Slusarz 69041fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 69141fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69241fef0eeSMarcin Slusarz { 69341fef0eeSMarcin Slusarz } 69441fef0eeSMarcin Slusarz 69541fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 69641fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69741fef0eeSMarcin Slusarz { 69841fef0eeSMarcin Slusarz } 69941fef0eeSMarcin Slusarz 70041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 70141fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70241fef0eeSMarcin Slusarz { 70341fef0eeSMarcin Slusarz } 70441fef0eeSMarcin Slusarz 70541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 70641fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70741fef0eeSMarcin Slusarz { 70841fef0eeSMarcin Slusarz } 70941fef0eeSMarcin Slusarz 71041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 71141fef0eeSMarcin Slusarz struct sk_buff *skb) 71241fef0eeSMarcin Slusarz { 71341fef0eeSMarcin Slusarz } 71441fef0eeSMarcin Slusarz 71541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 71641fef0eeSMarcin Slusarz u16 family) 71741fef0eeSMarcin Slusarz { 71841fef0eeSMarcin Slusarz } 71941fef0eeSMarcin Slusarz 72041fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 72141fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 72241fef0eeSMarcin Slusarz { 72341fef0eeSMarcin Slusarz } 72441fef0eeSMarcin Slusarz 72541fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 72641fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 72741fef0eeSMarcin Slusarz { 72841fef0eeSMarcin Slusarz } 729c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 730161a09e7SJoy Latten 7311da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds if (likely(policy != NULL)) 7341da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 73764c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7381da177e4SLinus Torvalds 7391da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7401da177e4SLinus Torvalds { 7411da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 74264c31b3fSWANG Cong xfrm_policy_destroy(policy); 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7454e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 7464e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7474e81bb83SMasahide NAKAMURA { 7484e81bb83SMasahide NAKAMURA int i; 7494e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7504e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7514e81bb83SMasahide NAKAMURA } 7524e81bb83SMasahide NAKAMURA #else 7534e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7544e81bb83SMasahide NAKAMURA { 7554e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 7564e81bb83SMasahide NAKAMURA } 7574e81bb83SMasahide NAKAMURA #endif 7584e81bb83SMasahide NAKAMURA 7591da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7601da177e4SLinus Torvalds 76121380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 76221380b81SHerbert Xu { 76321380b81SHerbert Xu atomic_dec(&x->refcnt); 76421380b81SHerbert Xu } 76521380b81SHerbert Xu 7661da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7671da177e4SLinus Torvalds { 7681da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7691da177e4SLinus Torvalds __xfrm_state_destroy(x); 7701da177e4SLinus Torvalds } 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7731da177e4SLinus Torvalds { 7741da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 7781da177e4SLinus Torvalds { 7795f19343fSAl Viro __be32 *a1 = token1; 7805f19343fSAl Viro __be32 *a2 = token2; 7811da177e4SLinus Torvalds int pdw; 7821da177e4SLinus Torvalds int pbi; 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 7851da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds if (pdw) 7881da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7891da177e4SLinus Torvalds return 0; 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds if (pbi) { 7925f19343fSAl Viro __be32 mask; 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7971da177e4SLinus Torvalds return 0; 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds return 1; 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds static __inline__ 804f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 8051da177e4SLinus Torvalds { 806f9d07e41SAl Viro __be16 port; 8071da177e4SLinus Torvalds switch(fl->proto) { 8081da177e4SLinus Torvalds case IPPROTO_TCP: 8091da177e4SLinus Torvalds case IPPROTO_UDP: 810ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8111da177e4SLinus Torvalds case IPPROTO_SCTP: 8121da177e4SLinus Torvalds port = fl->fl_ip_sport; 8131da177e4SLinus Torvalds break; 8141da177e4SLinus Torvalds case IPPROTO_ICMP: 8151da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8161da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 8171da177e4SLinus Torvalds break; 8182ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8192ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 8202ce4272aSMasahide NAKAMURA break; 8211da177e4SLinus Torvalds default: 8221da177e4SLinus Torvalds port = 0; /*XXX*/ 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds return port; 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds static __inline__ 828f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 8291da177e4SLinus Torvalds { 830f9d07e41SAl Viro __be16 port; 8311da177e4SLinus Torvalds switch(fl->proto) { 8321da177e4SLinus Torvalds case IPPROTO_TCP: 8331da177e4SLinus Torvalds case IPPROTO_UDP: 834ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8351da177e4SLinus Torvalds case IPPROTO_SCTP: 8361da177e4SLinus Torvalds port = fl->fl_ip_dport; 8371da177e4SLinus Torvalds break; 8381da177e4SLinus Torvalds case IPPROTO_ICMP: 8391da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8401da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 8411da177e4SLinus Torvalds break; 8421da177e4SLinus Torvalds default: 8431da177e4SLinus Torvalds port = 0; /*XXX*/ 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds return port; 8461da177e4SLinus Torvalds } 8471da177e4SLinus Torvalds 84877681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 84977681021SAndrew Morton unsigned short family); 8501da177e4SLinus Torvalds 851df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 852df71837dSTrent Jaeger /* If neither has a context --> match 853df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 854df71837dSTrent Jaeger */ 855df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 856df71837dSTrent Jaeger { 857df71837dSTrent Jaeger return ((!s1 && !s2) || 858df71837dSTrent Jaeger (s1 && s2 && 859df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 860df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 861df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 862df71837dSTrent Jaeger } 863df71837dSTrent Jaeger #else 864df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 865df71837dSTrent Jaeger { 866df71837dSTrent Jaeger return 1; 867df71837dSTrent Jaeger } 868df71837dSTrent Jaeger #endif 869df71837dSTrent Jaeger 8701da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8711da177e4SLinus Torvalds * 8721da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8731da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8741da177e4SLinus Torvalds * 8751da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8761da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8771da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8781da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8791da177e4SLinus Torvalds * policy rule. 8801da177e4SLinus Torvalds */ 8811da177e4SLinus Torvalds struct xfrm_dst 8821da177e4SLinus Torvalds { 8831da177e4SLinus Torvalds union { 8841da177e4SLinus Torvalds struct dst_entry dst; 8851da177e4SLinus Torvalds struct rtable rt; 8861da177e4SLinus Torvalds struct rt6_info rt6; 8871da177e4SLinus Torvalds } u; 8881da177e4SLinus Torvalds struct dst_entry *route; 889157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 890157bfc25SMasahide NAKAMURA struct flowi *origin; 891157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 892157bfc25SMasahide NAKAMURA #endif 8939d4a706dSDavid S. Miller u32 genid; 8941da177e4SLinus Torvalds u32 route_mtu_cached; 8951da177e4SLinus Torvalds u32 child_mtu_cached; 89692d63decSHideaki YOSHIFUJI u32 route_cookie; 89792d63decSHideaki YOSHIFUJI u32 path_cookie; 8981da177e4SLinus Torvalds }; 8991da177e4SLinus Torvalds 900def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 901aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 902aabc9761SHerbert Xu { 903aabc9761SHerbert Xu dst_release(xdst->route); 904aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 905aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 906157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 907157bfc25SMasahide NAKAMURA kfree(xdst->origin); 908157bfc25SMasahide NAKAMURA xdst->origin = NULL; 909157bfc25SMasahide NAKAMURA kfree(xdst->partner); 910157bfc25SMasahide NAKAMURA xdst->partner = NULL; 911157bfc25SMasahide NAKAMURA #endif 912aabc9761SHerbert Xu } 913def8b4faSAlexey Dobriyan #endif 914aabc9761SHerbert Xu 915aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 916aabc9761SHerbert Xu 9171da177e4SLinus Torvalds struct sec_path 9181da177e4SLinus Torvalds { 9191da177e4SLinus Torvalds atomic_t refcnt; 9201da177e4SLinus Torvalds int len; 921dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9221da177e4SLinus Torvalds }; 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds static inline struct sec_path * 9251da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9261da177e4SLinus Torvalds { 9271da177e4SLinus Torvalds if (sp) 9281da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9291da177e4SLinus Torvalds return sp; 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds static inline void 9351da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9361da177e4SLinus Torvalds { 9371da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9381da177e4SLinus Torvalds __secpath_destroy(sp); 9391da177e4SLinus Torvalds } 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds static inline void 9441da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9451da177e4SLinus Torvalds { 9461da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9471da177e4SLinus Torvalds secpath_put(skb->sp); 9481da177e4SLinus Torvalds skb->sp = NULL; 9491da177e4SLinus Torvalds #endif 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds static inline int 953a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 954a1e59abfSPatrick McHardy { 955a1e59abfSPatrick McHardy switch (family) { 956a1e59abfSPatrick McHardy case AF_INET: 957a1e59abfSPatrick McHardy return addr->a4 == 0; 958a1e59abfSPatrick McHardy case AF_INET6: 959a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 960a1e59abfSPatrick McHardy } 961a1e59abfSPatrick McHardy return 0; 962a1e59abfSPatrick McHardy } 963a1e59abfSPatrick McHardy 964a1e59abfSPatrick McHardy static inline int 9651da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9661da177e4SLinus Torvalds { 9671da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9681da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds static inline int 9721da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9731da177e4SLinus Torvalds { 9741da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9751da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds static inline int 9791da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 9801da177e4SLinus Torvalds { 9811da177e4SLinus Torvalds switch (family) { 9821da177e4SLinus Torvalds case AF_INET: 9831da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9841da177e4SLinus Torvalds case AF_INET6: 9851da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds return !0; 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9911da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 9921da177e4SLinus Torvalds 993d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 994d5422efeSHerbert Xu struct sk_buff *skb, 995d5422efeSHerbert Xu unsigned int family, int reverse) 9961da177e4SLinus Torvalds { 997d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 998d5422efeSHerbert Xu 9991da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 1000d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 10011da177e4SLinus Torvalds 10022518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 10031da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 1004d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 1005d5422efeSHerbert Xu } 1006d5422efeSHerbert Xu 1007d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 1008d5422efeSHerbert Xu { 1009d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10131da177e4SLinus Torvalds { 10141da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10181da177e4SLinus Torvalds { 10191da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds 1022d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1023d5422efeSHerbert Xu struct sk_buff *skb) 1024d5422efeSHerbert Xu { 1025d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1026d5422efeSHerbert Xu } 1027d5422efeSHerbert Xu 1028d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1029d5422efeSHerbert Xu struct sk_buff *skb) 1030d5422efeSHerbert Xu { 1031d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1032d5422efeSHerbert Xu } 1033d5422efeSHerbert Xu 1034d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1035d5422efeSHerbert Xu unsigned int family, int reverse); 1036d5422efeSHerbert Xu 1037d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1038d5422efeSHerbert Xu unsigned int family) 1039d5422efeSHerbert Xu { 1040d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1041d5422efeSHerbert Xu } 1042d5422efeSHerbert Xu 1043d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1044d5422efeSHerbert Xu struct flowi *fl, 1045d5422efeSHerbert Xu unsigned int family) 1046d5422efeSHerbert Xu { 1047d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1048d5422efeSHerbert Xu } 1049d5422efeSHerbert Xu 10501da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10531da177e4SLinus Torvalds { 10542518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 10551da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 10561da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10651da177e4SLinus Torvalds { 10661da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10741da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10751da177e4SLinus Torvalds return 0; 10761da177e4SLinus Torvalds } 10771da177e4SLinus Torvalds 10784666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10811da177e4SLinus Torvalds { 10821da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10831da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10841da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10871da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 10881da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds #else 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 10951da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 10961da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 10971da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 10981da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds return 1; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11031da177e4SLinus Torvalds { 11041da177e4SLinus Torvalds return 1; 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds return 1; 11091da177e4SLinus Torvalds } 1110d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1111d5422efeSHerbert Xu struct flowi *fl, 1112d5422efeSHerbert Xu unsigned int family) 1113d5422efeSHerbert Xu { 1114d5422efeSHerbert Xu return -ENOSYS; 1115d5422efeSHerbert Xu } 1116d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1117d5422efeSHerbert Xu struct sk_buff *skb) 1118d5422efeSHerbert Xu { 1119d5422efeSHerbert Xu return 1; 1120d5422efeSHerbert Xu } 1121d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1122d5422efeSHerbert Xu struct sk_buff *skb) 1123d5422efeSHerbert Xu { 1124d5422efeSHerbert Xu return 1; 1125d5422efeSHerbert Xu } 11261da177e4SLinus Torvalds #endif 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds static __inline__ 11291da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 11301da177e4SLinus Torvalds { 11311da177e4SLinus Torvalds switch (family){ 11321da177e4SLinus Torvalds case AF_INET: 11331da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11341da177e4SLinus Torvalds case AF_INET6: 11351da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds return NULL; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static __inline__ 11411da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds switch (family){ 11441da177e4SLinus Torvalds case AF_INET: 11451da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11461da177e4SLinus Torvalds case AF_INET6: 11471da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds return NULL; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11529bb182a7SYOSHIFUJI Hideaki static __inline__ 11539bb182a7SYOSHIFUJI Hideaki void xfrm_flowi_addr_get(struct flowi *fl, 11549bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11559bb182a7SYOSHIFUJI Hideaki unsigned short family) 11569bb182a7SYOSHIFUJI Hideaki { 11579bb182a7SYOSHIFUJI Hideaki switch(family) { 11589bb182a7SYOSHIFUJI Hideaki case AF_INET: 11599bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11609bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11619bb182a7SYOSHIFUJI Hideaki break; 11629bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11639bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11649bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11659bb182a7SYOSHIFUJI Hideaki break; 11669bb182a7SYOSHIFUJI Hideaki } 11679bb182a7SYOSHIFUJI Hideaki } 11689bb182a7SYOSHIFUJI Hideaki 11691da177e4SLinus Torvalds static __inline__ int 11701da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 11711da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11721da177e4SLinus Torvalds { 11731da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11741da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11751da177e4SLinus Torvalds return 1; 11761da177e4SLinus Torvalds return 0; 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds static __inline__ int 11801da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 11811da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11821da177e4SLinus Torvalds { 11831da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11841da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11851da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11861da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11871da177e4SLinus Torvalds return 1; 11881da177e4SLinus Torvalds return 0; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds static __inline__ int 11921da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 11931da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11941da177e4SLinus Torvalds unsigned short family) 11951da177e4SLinus Torvalds { 11961da177e4SLinus Torvalds switch (family) { 11971da177e4SLinus Torvalds case AF_INET: 11981da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 11991da177e4SLinus Torvalds case AF_INET6: 12001da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds return 0; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 1205e53820deSMasahide NAKAMURA static __inline__ int 1206e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1207e53820deSMasahide NAKAMURA unsigned short family) 1208e53820deSMasahide NAKAMURA { 1209e53820deSMasahide NAKAMURA switch (family) { 1210e53820deSMasahide NAKAMURA case AF_INET: 1211e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1212e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1213e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1214e53820deSMasahide NAKAMURA case AF_INET6: 1215e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1216e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1217e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1218e53820deSMasahide NAKAMURA } 1219e53820deSMasahide NAKAMURA return 0; 1220e53820deSMasahide NAKAMURA } 1221e53820deSMasahide NAKAMURA 12221da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 12231da177e4SLinus Torvalds { 12241da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12275794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12285794708fSMasahide NAKAMURA { 1229dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1230dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1231dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1232dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12335794708fSMasahide NAKAMURA } 12345794708fSMasahide NAKAMURA 12351da177e4SLinus Torvalds /* 12361da177e4SLinus Torvalds * xfrm algorithm information 12371da177e4SLinus Torvalds */ 12381a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12391a6509d9SHerbert Xu u16 icv_truncbits; 12401a6509d9SHerbert Xu }; 12411a6509d9SHerbert Xu 12421da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12431da177e4SLinus Torvalds u16 icv_truncbits; 12441da177e4SLinus Torvalds u16 icv_fullbits; 12451da177e4SLinus Torvalds }; 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12481da177e4SLinus Torvalds u16 blockbits; 12491da177e4SLinus Torvalds u16 defkeybits; 12501da177e4SLinus Torvalds }; 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12531da177e4SLinus Torvalds u16 threshold; 12541da177e4SLinus Torvalds }; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds struct xfrm_algo_desc { 12571da177e4SLinus Torvalds char *name; 125804ff1260SHerbert Xu char *compat; 12591da177e4SLinus Torvalds u8 available:1; 12601da177e4SLinus Torvalds union { 12611a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12621da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12631da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12641da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12651da177e4SLinus Torvalds } uinfo; 12661da177e4SLinus Torvalds struct sadb_alg desc; 12671da177e4SLinus Torvalds }; 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12701da177e4SLinus Torvalds struct xfrm_tunnel { 12711da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1272d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1273d2acc347SHerbert Xu 1274d2acc347SHerbert Xu struct xfrm_tunnel *next; 1275d2acc347SHerbert Xu int priority; 12761da177e4SLinus Torvalds }; 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds struct xfrm6_tunnel { 1279d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1280d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 128104ce6909SAl Viro int type, int code, int offset, __be32 info); 1282d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1283d2acc347SHerbert Xu int priority; 12841da177e4SLinus Torvalds }; 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds extern void xfrm_init(void); 12871da177e4SLinus Torvalds extern void xfrm4_init(void); 1288d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1289d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 12901da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1291c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1292c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1293c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12940013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12951da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1296c35b7e72SDaniel Lezcano #else 1297c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1298c35b7e72SDaniel Lezcano { 1299c35b7e72SDaniel Lezcano return 0; 1300c35b7e72SDaniel Lezcano } 1301c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1302c35b7e72SDaniel Lezcano { 1303c35b7e72SDaniel Lezcano ; 1304c35b7e72SDaniel Lezcano } 1305c35b7e72SDaniel Lezcano #endif 13061da177e4SLinus Torvalds 1307558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1308558f82efSMasahide NAKAMURA extern int xfrm_proc_init(void); 1309558f82efSMasahide NAKAMURA #endif 1310558f82efSMasahide NAKAMURA 13115c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 13124c563f76STimo Teras extern int xfrm_state_walk(struct xfrm_state_walk *walk, 13134c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1314abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1315673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 13161da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 13171da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 13181da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13191da177e4SLinus Torvalds unsigned short family); 1320628529b6SJamal Hadi Salim extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, 1321628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1322628529b6SJamal Hadi Salim unsigned short family, 1323628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13241da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13251da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13261da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13271da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1328a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1329eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 133041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 133141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 133241a49cc3SMasahide NAKAMURA int n, unsigned short family); 133341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 133441a49cc3SMasahide NAKAMURA int n, unsigned short family); 133541a49cc3SMasahide NAKAMURA #else 133641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 133741a49cc3SMasahide NAKAMURA int n, unsigned short family) 133841a49cc3SMasahide NAKAMURA { 133941a49cc3SMasahide NAKAMURA return -ENOSYS; 134041a49cc3SMasahide NAKAMURA } 134141a49cc3SMasahide NAKAMURA 134241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 134341a49cc3SMasahide NAKAMURA int n, unsigned short family) 134441a49cc3SMasahide NAKAMURA { 134541a49cc3SMasahide NAKAMURA return -ENOSYS; 134641a49cc3SMasahide NAKAMURA } 134741a49cc3SMasahide NAKAMURA #endif 1348af11e316SJamal Hadi Salim 1349af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1350af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1351af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1352af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1353af11e316SJamal Hadi Salim }; 1354af11e316SJamal Hadi Salim 13555a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13565a6d3416SJamal Hadi Salim u32 incnt; 13575a6d3416SJamal Hadi Salim u32 outcnt; 13585a6d3416SJamal Hadi Salim u32 fwdcnt; 13595a6d3416SJamal Hadi Salim u32 inscnt; 13605a6d3416SJamal Hadi Salim u32 outscnt; 13615a6d3416SJamal Hadi Salim u32 fwdscnt; 13625a6d3416SJamal Hadi Salim u32 spdhcnt; 13635a6d3416SJamal Hadi Salim u32 spdhmcnt; 13645a6d3416SJamal Hadi Salim }; 13655a6d3416SJamal Hadi Salim 13661da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 136726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 13684aa2e62cSJoy Latten extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 1369af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 13705a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1371afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1372afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 137361f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1374f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 13751da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 137672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1377227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1378716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1379716062fdSHerbert Xu int encap_type); 13801bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1381c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1382406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1383df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 138436cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1385227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1386c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1387c4541b41SHerbert Xu int encap_type); 1388716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 13891da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1390c4541b41SHerbert Xu 1391c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1392c4541b41SHerbert Xu { 1393c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1394c4541b41SHerbert Xu } 1395c4541b41SHerbert Xu 139636cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 139736cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 13981da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1399c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1400c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 140136cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1402227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 140333b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1404716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1405e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1406fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1407fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 140873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 140973d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 14108c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 14111da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 14128c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 141336cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 141436cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14151da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1416aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1417aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1420067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14211da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14221da177e4SLinus Torvalds #else 14231da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14241da177e4SLinus Torvalds { 14251da177e4SLinus Torvalds return -ENOPROTOOPT; 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds 1428067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14291da177e4SLinus Torvalds { 14301da177e4SLinus Torvalds /* should not happen */ 14311da177e4SLinus Torvalds kfree_skb(skb); 14321da177e4SLinus Torvalds return 0; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds #endif 14351da177e4SLinus Torvalds 14360331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14374c563f76STimo Teras 143812a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 14394c563f76STimo Teras extern int xfrm_policy_walk(struct xfrm_policy_walk *walk, 14404c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 144112a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14421da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14434e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 14444e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1445ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1446ef41aaa0SEric Paris int *err); 1447ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 14484aa2e62cSJoy Latten int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 14491da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1450658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 14511da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 14521da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 14531da177e4SLinus Torvalds int create, unsigned short family); 14541da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14555b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 14565b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 14571da177e4SLinus Torvalds 145880c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 145980c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 146013c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 146113c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 146280c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 146380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 146480c9abaaSShinta Sugimoto struct xfrm_migrate *m); 146580c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 146613c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 146713c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 146880c9abaaSShinta Sugimoto #endif 146980c9abaaSShinta Sugimoto 14705d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14716c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 147297a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14731da177e4SLinus Torvalds 14741da177e4SLinus Torvalds extern void xfrm_input_init(void); 14756067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14761da177e4SLinus Torvalds 14771da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14781da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 14791da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 14801da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 14811da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 14821da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 14831da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 14841da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 14851da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 14861da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 14871da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 14881a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 14891a6509d9SHerbert Xu int probe); 14901da177e4SLinus Torvalds 149107d4ee58SHerbert Xu struct hash_desc; 14929409f38aSHerbert Xu struct scatterlist; 149307d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 149407d4ee58SHerbert Xu unsigned int); 14951da177e4SLinus Torvalds 149607d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 14971da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 14981da177e4SLinus Torvalds 14991da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 15001da177e4SLinus Torvalds int family) 15011da177e4SLinus Torvalds { 15021da177e4SLinus Torvalds switch (family) { 15031da177e4SLinus Torvalds default: 15041da177e4SLinus Torvalds case AF_INET: 15058c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 15061da177e4SLinus Torvalds case AF_INET6: 15071da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15081da177e4SLinus Torvalds (struct in6_addr *)b); 15091da177e4SLinus Torvalds } 15101da177e4SLinus Torvalds } 15111da177e4SLinus Torvalds 151277d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 151377d8d7a6SHerbert Xu { 151477d8d7a6SHerbert Xu return index & 7; 151577d8d7a6SHerbert Xu } 151677d8d7a6SHerbert Xu 1517f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1518f8cd5488SJamal Hadi Salim { 1519be33690dSPatrick McHardy struct sock *nlsk; 1520be33690dSPatrick McHardy int ret = 0; 1521be33690dSPatrick McHardy 1522be33690dSPatrick McHardy rcu_read_lock(); 1523be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1524be33690dSPatrick McHardy if (nlsk) 1525be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1526be33690dSPatrick McHardy rcu_read_unlock(); 1527be33690dSPatrick McHardy return ret; 1528f8cd5488SJamal Hadi Salim } 1529f8cd5488SJamal Hadi Salim 15300f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 15310f99be0dSEric Dumazet { 15320f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15330f99be0dSEric Dumazet } 15340f99be0dSEric Dumazet 153580c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 153680c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 153780c9abaaSShinta Sugimoto { 15380f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 153980c9abaaSShinta Sugimoto } 154080c9abaaSShinta Sugimoto 154180c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 154280c9abaaSShinta Sugimoto { 154380c9abaaSShinta Sugimoto int i; 154480c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 154580c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 154680c9abaaSShinta Sugimoto } 154780c9abaaSShinta Sugimoto 154880c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 154980c9abaaSShinta Sugimoto { 155080c9abaaSShinta Sugimoto int i; 155180c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 155280c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 155380c9abaaSShinta Sugimoto } 155480c9abaaSShinta Sugimoto #endif 1555f8cd5488SJamal Hadi Salim 1556def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 155700501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 155800501121SHerbert Xu { 155900501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 156000501121SHerbert Xu } 1561def8b4faSAlexey Dobriyan #endif 156200501121SHerbert Xu 15631da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1564