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 u32 sysctl_xfrm_aevent_etime; 52f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_rseqth; 53a37ae408SPavel Emelyanov extern int sysctl_xfrm_larval_drop; 54a37ae408SPavel Emelyanov extern u32 sysctl_xfrm_acq_expires; 55f8cd5488SJamal Hadi Salim 564a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 591da177e4SLinus Torvalds ------------------------------------ 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds Basic objects: 621da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 631da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 641da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 651da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 681da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 691da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 701da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 751da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 761da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 771da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 781da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 791da177e4SLinus Torvalds to a dst_entry returned to requestor. 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 821da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 831da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 841da177e4SLinus Torvalds |---. child .-> NULL 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds Resolution of xrfm_tmpl 901da177e4SLinus Torvalds ----------------------- 911da177e4SLinus Torvalds Template contains: 921da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 931da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 941da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 951da177e4SLinus Torvalds Q: allow to resolve security gateway? 961da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 971da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 981da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 991da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 1001da177e4SLinus Torvalds 7. ->share Sharing mode. 1011da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1021da177e4SLinus Torvalds flow id? 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1051da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1061da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds PROBLEMS: 1091da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1101da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1111da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1121da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1131da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1141da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1151da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1161da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1171da177e4SLinus Torvalds */ 1181da177e4SLinus Torvalds 11912a169e7SHerbert Xu struct xfrm_state_walk { 12012a169e7SHerbert Xu struct list_head all; 12112a169e7SHerbert Xu u8 state; 12212a169e7SHerbert Xu union { 12312a169e7SHerbert Xu u8 dying; 12412a169e7SHerbert Xu u8 proto; 12512a169e7SHerbert Xu }; 12612a169e7SHerbert Xu u32 seq; 12712a169e7SHerbert Xu }; 12812a169e7SHerbert Xu 1291da177e4SLinus Torvalds /* Full description of state of transformer. */ 1301da177e4SLinus Torvalds struct xfrm_state 1311da177e4SLinus Torvalds { 132673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 133673c09beSAlexey Dobriyan struct net *xs_net; 134673c09beSAlexey Dobriyan #endif 135abb81c4fSHerbert Xu union { 13612a169e7SHerbert Xu struct hlist_node gclist; 1378f126e37SDavid S. Miller struct hlist_node bydst; 138abb81c4fSHerbert Xu }; 1398f126e37SDavid S. Miller struct hlist_node bysrc; 1408f126e37SDavid S. Miller struct hlist_node byspi; 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds atomic_t refcnt; 1431da177e4SLinus Torvalds spinlock_t lock; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds struct xfrm_id id; 1461da177e4SLinus Torvalds struct xfrm_selector sel; 1471da177e4SLinus Torvalds 1489d4a706dSDavid S. Miller u32 genid; 1499d4a706dSDavid S. Miller 15012a169e7SHerbert Xu /* Key manager bits */ 15112a169e7SHerbert Xu struct xfrm_state_walk km; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds /* Parameters of this state. */ 1541da177e4SLinus Torvalds struct { 1551da177e4SLinus Torvalds u32 reqid; 1561da177e4SLinus Torvalds u8 mode; 1571da177e4SLinus Torvalds u8 replay_window; 1581da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1591da177e4SLinus Torvalds u8 flags; 1601da177e4SLinus Torvalds u16 family; 1611da177e4SLinus Torvalds xfrm_address_t saddr; 1621da177e4SLinus Torvalds int header_len; 1631da177e4SLinus Torvalds int trailer_len; 1641da177e4SLinus Torvalds } props; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* Data for transformer */ 1691da177e4SLinus Torvalds struct xfrm_algo *aalg; 1701da177e4SLinus Torvalds struct xfrm_algo *ealg; 1711da177e4SLinus Torvalds struct xfrm_algo *calg; 1721a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* Data for encapsulator */ 1751da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1761da177e4SLinus Torvalds 177060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 178060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 179060f02a3SNoriaki TAKAMIYA 1801da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1811da177e4SLinus Torvalds struct xfrm_state *tunnel; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1841da177e4SLinus Torvalds atomic_t tunnel_users; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds /* State for replay detection */ 1871da177e4SLinus Torvalds struct xfrm_replay_state replay; 1881da177e4SLinus Torvalds 189f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 190f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 191f8cd5488SJamal Hadi Salim 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; 2081da177e4SLinus Torvalds struct timer_list timer; 2091da177e4SLinus Torvalds 2109afaca05SMasahide NAKAMURA /* Last used time */ 211d26f3984SHerbert Xu unsigned long lastused; 2129afaca05SMasahide NAKAMURA 2131da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2141da177e4SLinus Torvalds * transformer. */ 215533cb5b0SEric Dumazet const struct xfrm_type *type; 21613996378SHerbert Xu struct xfrm_mode *inner_mode; 217df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 21813996378SHerbert Xu struct xfrm_mode *outer_mode; 2191da177e4SLinus Torvalds 220df71837dSTrent Jaeger /* Security context */ 221df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 222df71837dSTrent Jaeger 2231da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2241da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2251da177e4SLinus Torvalds void *data; 2261da177e4SLinus Torvalds }; 2271da177e4SLinus Torvalds 228673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 229673c09beSAlexey Dobriyan { 230673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 231673c09beSAlexey Dobriyan } 232673c09beSAlexey Dobriyan 2332717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2342717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2352717096aSJamal Hadi Salim 2361da177e4SLinus Torvalds enum { 2371da177e4SLinus Torvalds XFRM_STATE_VOID, 2381da177e4SLinus Torvalds XFRM_STATE_ACQ, 2391da177e4SLinus Torvalds XFRM_STATE_VALID, 2401da177e4SLinus Torvalds XFRM_STATE_ERROR, 2411da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2421da177e4SLinus Torvalds XFRM_STATE_DEAD 2431da177e4SLinus Torvalds }; 2441da177e4SLinus Torvalds 24526b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 24626b15dadSJamal Hadi Salim struct km_event 24726b15dadSJamal Hadi Salim { 248bf08867fSHerbert Xu union { 249bf08867fSHerbert Xu u32 hard; 250bf08867fSHerbert Xu u32 proto; 251bf08867fSHerbert Xu u32 byid; 252f8cd5488SJamal Hadi Salim u32 aevent; 253f7b6983fSMasahide NAKAMURA u32 type; 254bf08867fSHerbert Xu } data; 255bf08867fSHerbert Xu 25626b15dadSJamal Hadi Salim u32 seq; 25726b15dadSJamal Hadi Salim u32 pid; 25826b15dadSJamal Hadi Salim u32 event; 2597067802eSAlexey Dobriyan struct net *net; 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; 268ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 269c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 270c5b3cf46SAlexey Dobriyan xfrm_address_t *saddr, 27166cdb3caSHerbert Xu xfrm_address_t *daddr); 272a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2731da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2741da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 275d5422efeSHerbert Xu struct flowi *fl, 276d5422efeSHerbert Xu int reverse); 27725ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 278a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 279a1b05140SMasahide NAKAMURA struct dst_entry *dst, 280a1b05140SMasahide NAKAMURA int nfheader_len); 28125ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 28225ee3286SHerbert Xu struct net_device *dev); 2831da177e4SLinus Torvalds }; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2861da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 28726b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 28826b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds struct xfrm_tmpl; 291980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29253bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29353bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29453bc6b4dSJamal Hadi Salim 2951da177e4SLinus Torvalds struct xfrm_state_afinfo { 29617c2a42aSHerbert Xu unsigned int family; 29736cf9acfSHerbert Xu unsigned int proto; 2988e3d716cSAl Viro __be16 eth_proto; 29917c2a42aSHerbert Xu struct module *owner; 300533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 301aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 302d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 3031da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 3041da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 3051da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 30641a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 30741a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 308cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 309227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 310227620e2SHerbert Xu struct sk_buff *skb); 31136cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31236cf9acfSHerbert Xu struct sk_buff *skb); 313716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 314716062fdSHerbert Xu int async); 3151da177e4SLinus Torvalds }; 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3181da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds struct xfrm_type 3231da177e4SLinus Torvalds { 3241da177e4SLinus Torvalds char *description; 3251da177e4SLinus Torvalds struct module *owner; 3261da177e4SLinus Torvalds __u8 proto; 3271b5c2299SMasahide NAKAMURA __u8 flags; 3281b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 329436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 330f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 331f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3321da177e4SLinus Torvalds 33372cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3341da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 335e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3361da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 337df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 338aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3391da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 340c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3411da177e4SLinus Torvalds }; 3421da177e4SLinus Torvalds 343533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 344533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3451da177e4SLinus Torvalds 346b59f45d0SHerbert Xu struct xfrm_mode { 347227620e2SHerbert Xu /* 348227620e2SHerbert Xu * Remove encapsulation header. 349227620e2SHerbert Xu * 350227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 351227620e2SHerbert Xu * header. 352227620e2SHerbert Xu * 353227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 354227620e2SHerbert Xu * should be and the network header shall be set to where the IP 355227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 356227620e2SHerbert Xu * payload. 357227620e2SHerbert Xu */ 358227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 359227620e2SHerbert Xu 360227620e2SHerbert Xu /* 361227620e2SHerbert Xu * This is the actual input entry point. 362227620e2SHerbert Xu * 363227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 364227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 365227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 366227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 367227620e2SHerbert Xu */ 368b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 36937fedd3aSHerbert Xu 37037fedd3aSHerbert Xu /* 37137fedd3aSHerbert Xu * Add encapsulation header. 37237fedd3aSHerbert Xu * 37337fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37437fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37537fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 37637fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 37737fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 37837fedd3aSHerbert Xu * header. The value of the network header will always point 37937fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 38037fedd3aSHerbert Xu */ 38136cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 38236cf9acfSHerbert Xu 38336cf9acfSHerbert Xu /* 38436cf9acfSHerbert Xu * This is the actual output entry point. 38536cf9acfSHerbert Xu * 38636cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 38736cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 38836cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 38936cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 39036cf9acfSHerbert Xu * call output2. 39136cf9acfSHerbert Xu */ 392eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 393b59f45d0SHerbert Xu 39417c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 395b59f45d0SHerbert Xu struct module *owner; 396b59f45d0SHerbert Xu unsigned int encap; 3971bfcb10fSHerbert Xu int flags; 3981bfcb10fSHerbert Xu }; 3991bfcb10fSHerbert Xu 4001bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 4011bfcb10fSHerbert Xu enum { 4021bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 403b59f45d0SHerbert Xu }; 404b59f45d0SHerbert Xu 405b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 406b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 407b59f45d0SHerbert Xu 408df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 409df9dcb45SKazunori MIYAZAWA { 410df9dcb45SKazunori MIYAZAWA switch(family) { 411df9dcb45SKazunori MIYAZAWA case AF_INET: 412df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 413df9dcb45SKazunori MIYAZAWA case AF_INET6: 414df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 415df9dcb45SKazunori MIYAZAWA default: 416df9dcb45SKazunori MIYAZAWA return 0; 417df9dcb45SKazunori MIYAZAWA } 418df9dcb45SKazunori MIYAZAWA } 419df9dcb45SKazunori MIYAZAWA 420df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 421df9dcb45SKazunori MIYAZAWA { 422df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 423df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 424df9dcb45SKazunori MIYAZAWA return x->inner_mode; 425df9dcb45SKazunori MIYAZAWA else 426df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 427df9dcb45SKazunori MIYAZAWA } 428df9dcb45SKazunori MIYAZAWA 4291da177e4SLinus Torvalds struct xfrm_tmpl 4301da177e4SLinus Torvalds { 4311da177e4SLinus Torvalds /* id in template is interpreted as: 4321da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4331da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4341da177e4SLinus Torvalds * daddr must be fixed too. 4351da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4361da177e4SLinus Torvalds */ 4371da177e4SLinus Torvalds struct xfrm_id id; 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4401da177e4SLinus Torvalds xfrm_address_t saddr; 4411da177e4SLinus Torvalds 44276b3f055SMiika Komu unsigned short encap_family; 44376b3f055SMiika Komu 4441da177e4SLinus Torvalds __u32 reqid; 4451da177e4SLinus Torvalds 4467e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 4471da177e4SLinus Torvalds __u8 mode; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 4501da177e4SLinus Torvalds __u8 share; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 4531da177e4SLinus Torvalds __u8 optional; 4541da177e4SLinus Torvalds 455c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 456c5d18e98SHerbert Xu __u8 allalgs; 457c5d18e98SHerbert Xu 4581da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 4591da177e4SLinus Torvalds __u32 aalgos; 4601da177e4SLinus Torvalds __u32 ealgos; 4611da177e4SLinus Torvalds __u32 calgos; 4621da177e4SLinus Torvalds }; 4631da177e4SLinus Torvalds 464622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4651da177e4SLinus Torvalds 46612a169e7SHerbert Xu struct xfrm_policy_walk_entry { 46712a169e7SHerbert Xu struct list_head all; 46812a169e7SHerbert Xu u8 dead; 46912a169e7SHerbert Xu }; 47012a169e7SHerbert Xu 47112a169e7SHerbert Xu struct xfrm_policy_walk { 47212a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 47312a169e7SHerbert Xu u8 type; 47412a169e7SHerbert Xu u32 seq; 47512a169e7SHerbert Xu }; 47612a169e7SHerbert Xu 4771da177e4SLinus Torvalds struct xfrm_policy 4781da177e4SLinus Torvalds { 4790331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4800331b1f3SAlexey Dobriyan struct net *xp_net; 4810331b1f3SAlexey Dobriyan #endif 4822518c7c2SDavid S. Miller struct hlist_node bydst; 4832518c7c2SDavid S. Miller struct hlist_node byidx; 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4861da177e4SLinus Torvalds rwlock_t lock; 4871da177e4SLinus Torvalds atomic_t refcnt; 4881da177e4SLinus Torvalds struct timer_list timer; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds u32 priority; 4911da177e4SLinus Torvalds u32 index; 4921da177e4SLinus Torvalds struct xfrm_selector selector; 4931da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4941da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 4951da177e4SLinus Torvalds struct dst_entry *bundles; 49612a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49746ca5f5dSArnaldo Carvalho de Melo u8 type; 49846ca5f5dSArnaldo Carvalho de Melo u8 action; 49946ca5f5dSArnaldo Carvalho de Melo u8 flags; 50046ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 50112a169e7SHerbert Xu u16 family; 502df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5031da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5041da177e4SLinus Torvalds }; 5051da177e4SLinus Torvalds 5060331b1f3SAlexey Dobriyan static inline struct net *xp_net(struct xfrm_policy *xp) 5070331b1f3SAlexey Dobriyan { 5080331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5090331b1f3SAlexey Dobriyan } 5100331b1f3SAlexey Dobriyan 51113c1d189SArnaud Ebalard struct xfrm_kmaddress { 51213c1d189SArnaud Ebalard xfrm_address_t local; 51313c1d189SArnaud Ebalard xfrm_address_t remote; 51413c1d189SArnaud Ebalard u32 reserved; 51513c1d189SArnaud Ebalard u16 family; 51613c1d189SArnaud Ebalard }; 51713c1d189SArnaud Ebalard 51880c9abaaSShinta Sugimoto struct xfrm_migrate { 51980c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 52080c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 52180c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 52280c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52380c9abaaSShinta Sugimoto u8 proto; 52480c9abaaSShinta Sugimoto u8 mode; 52580c9abaaSShinta Sugimoto u16 reserved; 52680c9abaaSShinta Sugimoto u32 reqid; 52780c9abaaSShinta Sugimoto u16 old_family; 52880c9abaaSShinta Sugimoto u16 new_family; 52980c9abaaSShinta Sugimoto }; 53080c9abaaSShinta Sugimoto 5311da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 532f8cd5488SJamal Hadi Salim /* which seqno */ 533f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 534f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 535f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 536f8cd5488SJamal Hadi Salim /* what happened */ 537f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 538f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 539f8cd5488SJamal Hadi Salim 540f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 541f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 542f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 543f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 544f8cd5488SJamal Hadi Salim /* default seq threshold size */ 545f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds struct xfrm_mgr 5481da177e4SLinus Torvalds { 5491da177e4SLinus Torvalds struct list_head list; 5501da177e4SLinus Torvalds char *id; 55126b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 5521da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 553cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5545d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 55526b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 556db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 55713c1d189SArnaud Ebalard int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); 5581da177e4SLinus Torvalds }; 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5611da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5621da177e4SLinus Torvalds 563436a0a40SHerbert Xu /* 564436a0a40SHerbert Xu * This structure is used for the duration where packets are being 565436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 566436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 567436a0a40SHerbert Xu */ 568436a0a40SHerbert Xu struct xfrm_skb_cb { 569436a0a40SHerbert Xu union { 570436a0a40SHerbert Xu struct inet_skb_parm h4; 571436a0a40SHerbert Xu struct inet6_skb_parm h6; 572436a0a40SHerbert Xu } header; 573436a0a40SHerbert Xu 574436a0a40SHerbert Xu /* Sequence number for replay protection. */ 575b318e0e4SHerbert Xu union { 576b318e0e4SHerbert Xu u64 output; 577b318e0e4SHerbert Xu __be32 input; 578b318e0e4SHerbert Xu } seq; 579436a0a40SHerbert Xu }; 580436a0a40SHerbert Xu 581436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 582436a0a40SHerbert Xu 58336cf9acfSHerbert Xu /* 58436cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 58536cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 58636cf9acfSHerbert Xu */ 58736cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 58836cf9acfSHerbert Xu union { 58936cf9acfSHerbert Xu struct inet_skb_parm h4; 59036cf9acfSHerbert Xu struct inet6_skb_parm h6; 59136cf9acfSHerbert Xu } header; 59236cf9acfSHerbert Xu 59336cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 59436cf9acfSHerbert Xu __be16 id; 59536cf9acfSHerbert Xu __be16 frag_off; 59636cf9acfSHerbert Xu 597732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 598732c8bd5SHerbert Xu u8 ihl; 599732c8bd5SHerbert Xu 60036cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 60136cf9acfSHerbert Xu u8 tos; 60236cf9acfSHerbert Xu 60336cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 60436cf9acfSHerbert Xu u8 ttl; 60536cf9acfSHerbert Xu 60636cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 60736cf9acfSHerbert Xu u8 protocol; 60836cf9acfSHerbert Xu 609732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 610732c8bd5SHerbert Xu u8 optlen; 611732c8bd5SHerbert Xu 61236cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 61336cf9acfSHerbert Xu u8 flow_lbl[3]; 61436cf9acfSHerbert Xu }; 61536cf9acfSHerbert Xu 61636cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 61736cf9acfSHerbert Xu 618716062fdSHerbert Xu /* 619716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 620716062fdSHerbert Xu * related information. 621716062fdSHerbert Xu */ 622716062fdSHerbert Xu struct xfrm_spi_skb_cb { 623716062fdSHerbert Xu union { 624716062fdSHerbert Xu struct inet_skb_parm h4; 625716062fdSHerbert Xu struct inet6_skb_parm h6; 626716062fdSHerbert Xu } header; 627716062fdSHerbert Xu 628716062fdSHerbert Xu unsigned int daddroff; 6292fcb45b6SHerbert Xu unsigned int family; 630716062fdSHerbert Xu }; 631716062fdSHerbert Xu 632716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 633716062fdSHerbert Xu 634161a09e7SJoy Latten /* Audit Information */ 635161a09e7SJoy Latten struct xfrm_audit 636161a09e7SJoy Latten { 637161a09e7SJoy Latten u32 secid; 6382532386fSEric Paris uid_t loginuid; 6392532386fSEric Paris u32 sessionid; 640161a09e7SJoy Latten }; 641c9204d9cSJoy Latten 642c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 643afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 644ab5f5e8bSJoy Latten { 645ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 646ab5f5e8bSJoy Latten 647afeb14b4SPaul Moore if (audit_enabled == 0) 648afeb14b4SPaul Moore return NULL; 649ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 650ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 651ab5f5e8bSJoy Latten if (audit_buf == NULL) 652ab5f5e8bSJoy Latten return NULL; 653afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 654afeb14b4SPaul Moore return audit_buf; 655afeb14b4SPaul Moore } 656afeb14b4SPaul Moore 6572532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 658afeb14b4SPaul Moore struct audit_buffer *audit_buf) 659afeb14b4SPaul Moore { 660afeb14b4SPaul Moore char *secctx; 661afeb14b4SPaul Moore u32 secctx_len; 662ab5f5e8bSJoy Latten 6632532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 66468277accSPaul Moore if (secid != 0 && 66568277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 666ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 667ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 668ab5f5e8bSJoy Latten } else 669ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 670ab5f5e8bSJoy Latten } 671ab5f5e8bSJoy Latten 672ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6732532386fSEric Paris u32 auid, u32 ses, u32 secid); 674ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6752532386fSEric Paris u32 auid, u32 ses, u32 secid); 676ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6772532386fSEric Paris u32 auid, u32 ses, u32 secid); 678ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6792532386fSEric Paris u32 auid, u32 ses, u32 secid); 680afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 681afeb14b4SPaul Moore struct sk_buff *skb); 682afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 683afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 684afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 685afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 686afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 687c9204d9cSJoy Latten #else 68841fef0eeSMarcin Slusarz 68941fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 69041fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69141fef0eeSMarcin Slusarz { 69241fef0eeSMarcin Slusarz } 69341fef0eeSMarcin Slusarz 69441fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 69541fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69641fef0eeSMarcin Slusarz { 69741fef0eeSMarcin Slusarz } 69841fef0eeSMarcin Slusarz 69941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 70041fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70141fef0eeSMarcin Slusarz { 70241fef0eeSMarcin Slusarz } 70341fef0eeSMarcin Slusarz 70441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 70541fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70641fef0eeSMarcin Slusarz { 70741fef0eeSMarcin Slusarz } 70841fef0eeSMarcin Slusarz 70941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 71041fef0eeSMarcin Slusarz struct sk_buff *skb) 71141fef0eeSMarcin Slusarz { 71241fef0eeSMarcin Slusarz } 71341fef0eeSMarcin Slusarz 71441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 71541fef0eeSMarcin Slusarz u16 family) 71641fef0eeSMarcin Slusarz { 71741fef0eeSMarcin Slusarz } 71841fef0eeSMarcin Slusarz 71941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 72041fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 72141fef0eeSMarcin Slusarz { 72241fef0eeSMarcin Slusarz } 72341fef0eeSMarcin Slusarz 72441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 72541fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 72641fef0eeSMarcin Slusarz { 72741fef0eeSMarcin Slusarz } 728c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 729161a09e7SJoy Latten 7301da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7311da177e4SLinus Torvalds { 7321da177e4SLinus Torvalds if (likely(policy != NULL)) 7331da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7341da177e4SLinus Torvalds } 7351da177e4SLinus Torvalds 73664c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7371da177e4SLinus Torvalds 7381da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7391da177e4SLinus Torvalds { 7401da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 74164c31b3fSWANG Cong xfrm_policy_destroy(policy); 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds 7444e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 7454e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7464e81bb83SMasahide NAKAMURA { 7474e81bb83SMasahide NAKAMURA int i; 7484e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7494e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7504e81bb83SMasahide NAKAMURA } 7514e81bb83SMasahide NAKAMURA #else 7524e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7534e81bb83SMasahide NAKAMURA { 7544e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 7554e81bb83SMasahide NAKAMURA } 7564e81bb83SMasahide NAKAMURA #endif 7574e81bb83SMasahide NAKAMURA 7581da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7591da177e4SLinus Torvalds 76021380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 76121380b81SHerbert Xu { 76221380b81SHerbert Xu atomic_dec(&x->refcnt); 76321380b81SHerbert Xu } 76421380b81SHerbert Xu 7651da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7661da177e4SLinus Torvalds { 7671da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7681da177e4SLinus Torvalds __xfrm_state_destroy(x); 7691da177e4SLinus Torvalds } 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7721da177e4SLinus Torvalds { 7731da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 7771da177e4SLinus Torvalds { 7785f19343fSAl Viro __be32 *a1 = token1; 7795f19343fSAl Viro __be32 *a2 = token2; 7801da177e4SLinus Torvalds int pdw; 7811da177e4SLinus Torvalds int pbi; 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 7841da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds if (pdw) 7871da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7881da177e4SLinus Torvalds return 0; 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds if (pbi) { 7915f19343fSAl Viro __be32 mask; 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7961da177e4SLinus Torvalds return 0; 7971da177e4SLinus Torvalds } 7981da177e4SLinus Torvalds 7991da177e4SLinus Torvalds return 1; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds static __inline__ 803f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 8041da177e4SLinus Torvalds { 805f9d07e41SAl Viro __be16 port; 8061da177e4SLinus Torvalds switch(fl->proto) { 8071da177e4SLinus Torvalds case IPPROTO_TCP: 8081da177e4SLinus Torvalds case IPPROTO_UDP: 809ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8101da177e4SLinus Torvalds case IPPROTO_SCTP: 8111da177e4SLinus Torvalds port = fl->fl_ip_sport; 8121da177e4SLinus Torvalds break; 8131da177e4SLinus Torvalds case IPPROTO_ICMP: 8141da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8151da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 8161da177e4SLinus Torvalds break; 8172ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8182ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 8192ce4272aSMasahide NAKAMURA break; 8201da177e4SLinus Torvalds default: 8211da177e4SLinus Torvalds port = 0; /*XXX*/ 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds return port; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds static __inline__ 827f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 8281da177e4SLinus Torvalds { 829f9d07e41SAl Viro __be16 port; 8301da177e4SLinus Torvalds switch(fl->proto) { 8311da177e4SLinus Torvalds case IPPROTO_TCP: 8321da177e4SLinus Torvalds case IPPROTO_UDP: 833ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8341da177e4SLinus Torvalds case IPPROTO_SCTP: 8351da177e4SLinus Torvalds port = fl->fl_ip_dport; 8361da177e4SLinus Torvalds break; 8371da177e4SLinus Torvalds case IPPROTO_ICMP: 8381da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8391da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 8401da177e4SLinus Torvalds break; 8411da177e4SLinus Torvalds default: 8421da177e4SLinus Torvalds port = 0; /*XXX*/ 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds return port; 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 84777681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 84877681021SAndrew Morton unsigned short family); 8491da177e4SLinus Torvalds 850df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 851df71837dSTrent Jaeger /* If neither has a context --> match 852df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 853df71837dSTrent Jaeger */ 854df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 855df71837dSTrent Jaeger { 856df71837dSTrent Jaeger return ((!s1 && !s2) || 857df71837dSTrent Jaeger (s1 && s2 && 858df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 859df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 860df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 861df71837dSTrent Jaeger } 862df71837dSTrent Jaeger #else 863df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 864df71837dSTrent Jaeger { 865df71837dSTrent Jaeger return 1; 866df71837dSTrent Jaeger } 867df71837dSTrent Jaeger #endif 868df71837dSTrent Jaeger 8691da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8701da177e4SLinus Torvalds * 8711da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8721da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8731da177e4SLinus Torvalds * 8741da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8751da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8761da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8771da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8781da177e4SLinus Torvalds * policy rule. 8791da177e4SLinus Torvalds */ 8801da177e4SLinus Torvalds struct xfrm_dst 8811da177e4SLinus Torvalds { 8821da177e4SLinus Torvalds union { 8831da177e4SLinus Torvalds struct dst_entry dst; 8841da177e4SLinus Torvalds struct rtable rt; 8851da177e4SLinus Torvalds struct rt6_info rt6; 8861da177e4SLinus Torvalds } u; 8871da177e4SLinus Torvalds struct dst_entry *route; 888157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 889157bfc25SMasahide NAKAMURA struct flowi *origin; 890157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 891157bfc25SMasahide NAKAMURA #endif 8929d4a706dSDavid S. Miller u32 genid; 8931da177e4SLinus Torvalds u32 route_mtu_cached; 8941da177e4SLinus Torvalds u32 child_mtu_cached; 89592d63decSHideaki YOSHIFUJI u32 route_cookie; 89692d63decSHideaki YOSHIFUJI u32 path_cookie; 8971da177e4SLinus Torvalds }; 8981da177e4SLinus Torvalds 899def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 900aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 901aabc9761SHerbert Xu { 902aabc9761SHerbert Xu dst_release(xdst->route); 903aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 904aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 905157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 906157bfc25SMasahide NAKAMURA kfree(xdst->origin); 907157bfc25SMasahide NAKAMURA xdst->origin = NULL; 908157bfc25SMasahide NAKAMURA kfree(xdst->partner); 909157bfc25SMasahide NAKAMURA xdst->partner = NULL; 910157bfc25SMasahide NAKAMURA #endif 911aabc9761SHerbert Xu } 912def8b4faSAlexey Dobriyan #endif 913aabc9761SHerbert Xu 914aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 915aabc9761SHerbert Xu 9161da177e4SLinus Torvalds struct sec_path 9171da177e4SLinus Torvalds { 9181da177e4SLinus Torvalds atomic_t refcnt; 9191da177e4SLinus Torvalds int len; 920dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9211da177e4SLinus Torvalds }; 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds static inline struct sec_path * 9241da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9251da177e4SLinus Torvalds { 9261da177e4SLinus Torvalds if (sp) 9271da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9281da177e4SLinus Torvalds return sp; 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds static inline void 9341da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9371da177e4SLinus Torvalds __secpath_destroy(sp); 9381da177e4SLinus Torvalds } 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds static inline void 9431da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9441da177e4SLinus Torvalds { 9451da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9461da177e4SLinus Torvalds secpath_put(skb->sp); 9471da177e4SLinus Torvalds skb->sp = NULL; 9481da177e4SLinus Torvalds #endif 9491da177e4SLinus Torvalds } 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds static inline int 952a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 953a1e59abfSPatrick McHardy { 954a1e59abfSPatrick McHardy switch (family) { 955a1e59abfSPatrick McHardy case AF_INET: 956a1e59abfSPatrick McHardy return addr->a4 == 0; 957a1e59abfSPatrick McHardy case AF_INET6: 958a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 959a1e59abfSPatrick McHardy } 960a1e59abfSPatrick McHardy return 0; 961a1e59abfSPatrick McHardy } 962a1e59abfSPatrick McHardy 963a1e59abfSPatrick McHardy static inline int 9641da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9651da177e4SLinus Torvalds { 9661da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9671da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9681da177e4SLinus Torvalds } 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds static inline int 9711da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9721da177e4SLinus Torvalds { 9731da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9741da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds static inline int 9781da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 9791da177e4SLinus Torvalds { 9801da177e4SLinus Torvalds switch (family) { 9811da177e4SLinus Torvalds case AF_INET: 9821da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9831da177e4SLinus Torvalds case AF_INET6: 9841da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds return !0; 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9901da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 9911da177e4SLinus Torvalds 992d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 993d5422efeSHerbert Xu struct sk_buff *skb, 994d5422efeSHerbert Xu unsigned int family, int reverse) 9951da177e4SLinus Torvalds { 996f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 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 1002f6e1e25dSAlexey Dobriyan return (!net->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 { 105499a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 105599a66657SAlexey Dobriyan 105699a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 10571da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 10581da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds 10611da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10621da177e4SLinus Torvalds { 10631da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10671da177e4SLinus Torvalds { 10681da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10741da177e4SLinus Torvalds { 10751da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10761da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10771da177e4SLinus Torvalds return 0; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 10804666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10831da177e4SLinus Torvalds { 10841da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10851da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10861da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10891da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 10901da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 10911da177e4SLinus Torvalds } 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds #else 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 10971da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 10981da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 10991da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 11001da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11011da177e4SLinus Torvalds { 11021da177e4SLinus Torvalds return 1; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 11051da177e4SLinus Torvalds { 11061da177e4SLinus Torvalds return 1; 11071da177e4SLinus Torvalds } 11081da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11091da177e4SLinus Torvalds { 11101da177e4SLinus Torvalds return 1; 11111da177e4SLinus Torvalds } 1112d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1113d5422efeSHerbert Xu struct flowi *fl, 1114d5422efeSHerbert Xu unsigned int family) 1115d5422efeSHerbert Xu { 1116d5422efeSHerbert Xu return -ENOSYS; 1117d5422efeSHerbert Xu } 1118d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1119d5422efeSHerbert Xu struct sk_buff *skb) 1120d5422efeSHerbert Xu { 1121d5422efeSHerbert Xu return 1; 1122d5422efeSHerbert Xu } 1123d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1124d5422efeSHerbert Xu struct sk_buff *skb) 1125d5422efeSHerbert Xu { 1126d5422efeSHerbert Xu return 1; 1127d5422efeSHerbert Xu } 11281da177e4SLinus Torvalds #endif 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds static __inline__ 11311da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 11321da177e4SLinus Torvalds { 11331da177e4SLinus Torvalds switch (family){ 11341da177e4SLinus Torvalds case AF_INET: 11351da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11361da177e4SLinus Torvalds case AF_INET6: 11371da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds return NULL; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvalds static __inline__ 11431da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 11441da177e4SLinus Torvalds { 11451da177e4SLinus Torvalds switch (family){ 11461da177e4SLinus Torvalds case AF_INET: 11471da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11481da177e4SLinus Torvalds case AF_INET6: 11491da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds return NULL; 11521da177e4SLinus Torvalds } 11531da177e4SLinus Torvalds 11549bb182a7SYOSHIFUJI Hideaki static __inline__ 11559bb182a7SYOSHIFUJI Hideaki void xfrm_flowi_addr_get(struct flowi *fl, 11569bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11579bb182a7SYOSHIFUJI Hideaki unsigned short family) 11589bb182a7SYOSHIFUJI Hideaki { 11599bb182a7SYOSHIFUJI Hideaki switch(family) { 11609bb182a7SYOSHIFUJI Hideaki case AF_INET: 11619bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11629bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11639bb182a7SYOSHIFUJI Hideaki break; 11649bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11659bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11669bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11679bb182a7SYOSHIFUJI Hideaki break; 11689bb182a7SYOSHIFUJI Hideaki } 11699bb182a7SYOSHIFUJI Hideaki } 11709bb182a7SYOSHIFUJI Hideaki 11711da177e4SLinus Torvalds static __inline__ int 11721da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 11731da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11741da177e4SLinus Torvalds { 11751da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11761da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11771da177e4SLinus Torvalds return 1; 11781da177e4SLinus Torvalds return 0; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds static __inline__ int 11821da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 11831da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11841da177e4SLinus Torvalds { 11851da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11861da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11871da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11881da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11891da177e4SLinus Torvalds return 1; 11901da177e4SLinus Torvalds return 0; 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds static __inline__ int 11941da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 11951da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11961da177e4SLinus Torvalds unsigned short family) 11971da177e4SLinus Torvalds { 11981da177e4SLinus Torvalds switch (family) { 11991da177e4SLinus Torvalds case AF_INET: 12001da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 12011da177e4SLinus Torvalds case AF_INET6: 12021da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds return 0; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds 1207e53820deSMasahide NAKAMURA static __inline__ int 1208e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1209e53820deSMasahide NAKAMURA unsigned short family) 1210e53820deSMasahide NAKAMURA { 1211e53820deSMasahide NAKAMURA switch (family) { 1212e53820deSMasahide NAKAMURA case AF_INET: 1213e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1214e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1215e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1216e53820deSMasahide NAKAMURA case AF_INET6: 1217e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1218e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1219e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1220e53820deSMasahide NAKAMURA } 1221e53820deSMasahide NAKAMURA return 0; 1222e53820deSMasahide NAKAMURA } 1223e53820deSMasahide NAKAMURA 12241da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 12251da177e4SLinus Torvalds { 12261da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds 12295794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12305794708fSMasahide NAKAMURA { 1231dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1232dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1233dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1234dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12355794708fSMasahide NAKAMURA } 12365794708fSMasahide NAKAMURA 12371da177e4SLinus Torvalds /* 12381da177e4SLinus Torvalds * xfrm algorithm information 12391da177e4SLinus Torvalds */ 12401a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12411a6509d9SHerbert Xu u16 icv_truncbits; 12421a6509d9SHerbert Xu }; 12431a6509d9SHerbert Xu 12441da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12451da177e4SLinus Torvalds u16 icv_truncbits; 12461da177e4SLinus Torvalds u16 icv_fullbits; 12471da177e4SLinus Torvalds }; 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12501da177e4SLinus Torvalds u16 blockbits; 12511da177e4SLinus Torvalds u16 defkeybits; 12521da177e4SLinus Torvalds }; 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12551da177e4SLinus Torvalds u16 threshold; 12561da177e4SLinus Torvalds }; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds struct xfrm_algo_desc { 12591da177e4SLinus Torvalds char *name; 126004ff1260SHerbert Xu char *compat; 12611da177e4SLinus Torvalds u8 available:1; 12621da177e4SLinus Torvalds union { 12631a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12641da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12651da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12661da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12671da177e4SLinus Torvalds } uinfo; 12681da177e4SLinus Torvalds struct sadb_alg desc; 12691da177e4SLinus Torvalds }; 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12721da177e4SLinus Torvalds struct xfrm_tunnel { 12731da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1274d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1275d2acc347SHerbert Xu 1276d2acc347SHerbert Xu struct xfrm_tunnel *next; 1277d2acc347SHerbert Xu int priority; 12781da177e4SLinus Torvalds }; 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds struct xfrm6_tunnel { 1281d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1282d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 128304ce6909SAl Viro int type, int code, int offset, __be32 info); 1284d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1285d2acc347SHerbert Xu int priority; 12861da177e4SLinus Torvalds }; 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds extern void xfrm_init(void); 12891da177e4SLinus Torvalds extern void xfrm4_init(void); 1290d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1291d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 12921da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1293c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1294c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1295c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12960013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12971da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1298c35b7e72SDaniel Lezcano #else 1299c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1300c35b7e72SDaniel Lezcano { 1301c35b7e72SDaniel Lezcano return 0; 1302c35b7e72SDaniel Lezcano } 1303c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1304c35b7e72SDaniel Lezcano { 1305c35b7e72SDaniel Lezcano ; 1306c35b7e72SDaniel Lezcano } 1307c35b7e72SDaniel Lezcano #endif 13081da177e4SLinus Torvalds 1309558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1310558f82efSMasahide NAKAMURA extern int xfrm_proc_init(void); 1311558f82efSMasahide NAKAMURA #endif 1312558f82efSMasahide NAKAMURA 13135c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1314284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13154c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1316abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1317673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 13181da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 13191da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 13201da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13211da177e4SLinus Torvalds unsigned short family); 13225447c5e4SAlexey Dobriyan extern struct xfrm_state * xfrm_stateonly_find(struct net *net, 13235447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1324628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1325628529b6SJamal Hadi Salim unsigned short family, 1326628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13271da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13281da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13291da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13301da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1331221df1edSAlexey Dobriyan extern struct xfrm_state *xfrm_state_lookup(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1332221df1edSAlexey Dobriyan extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 133341a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 133441a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 133541a49cc3SMasahide NAKAMURA int n, unsigned short family); 133641a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 133741a49cc3SMasahide NAKAMURA int n, unsigned short family); 133841a49cc3SMasahide NAKAMURA #else 133941a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 134041a49cc3SMasahide NAKAMURA int n, unsigned short family) 134141a49cc3SMasahide NAKAMURA { 134241a49cc3SMasahide NAKAMURA return -ENOSYS; 134341a49cc3SMasahide NAKAMURA } 134441a49cc3SMasahide NAKAMURA 134541a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 134641a49cc3SMasahide NAKAMURA int n, unsigned short family) 134741a49cc3SMasahide NAKAMURA { 134841a49cc3SMasahide NAKAMURA return -ENOSYS; 134941a49cc3SMasahide NAKAMURA } 135041a49cc3SMasahide NAKAMURA #endif 1351af11e316SJamal Hadi Salim 1352af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1353af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1354af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1355af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1356af11e316SJamal Hadi Salim }; 1357af11e316SJamal Hadi Salim 13585a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13595a6d3416SJamal Hadi Salim u32 incnt; 13605a6d3416SJamal Hadi Salim u32 outcnt; 13615a6d3416SJamal Hadi Salim u32 fwdcnt; 13625a6d3416SJamal Hadi Salim u32 inscnt; 13635a6d3416SJamal Hadi Salim u32 outscnt; 13645a6d3416SJamal Hadi Salim u32 fwdscnt; 13655a6d3416SJamal Hadi Salim u32 spdhcnt; 13665a6d3416SJamal Hadi Salim u32 spdhmcnt; 13675a6d3416SJamal Hadi Salim }; 13685a6d3416SJamal Hadi Salim 13695447c5e4SAlexey Dobriyan extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 seq); 137026b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 13710e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1372af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 13735a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1374afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1375afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 137661f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1377f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 13781da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 137972cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1380227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1381716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1382716062fdSHerbert Xu int encap_type); 13831bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1384c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1385406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1386df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 138736cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1388227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1389c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1390c4541b41SHerbert Xu int encap_type); 1391716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 13921da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1393c4541b41SHerbert Xu 1394c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1395c4541b41SHerbert Xu { 1396c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1397c4541b41SHerbert Xu } 1398c4541b41SHerbert Xu 139936cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 140036cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14011da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1402c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1403c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 140436cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1405227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 140633b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1407716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1408e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1409fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1410fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 141173d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 141273d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 14138c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 14141da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 14158c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 141636cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 141736cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14181da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1419aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1420aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1423067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14241da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14251da177e4SLinus Torvalds #else 14261da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14271da177e4SLinus Torvalds { 14281da177e4SLinus Torvalds return -ENOPROTOOPT; 14291da177e4SLinus Torvalds } 14301da177e4SLinus Torvalds 1431067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14321da177e4SLinus Torvalds { 14331da177e4SLinus Torvalds /* should not happen */ 14341da177e4SLinus Torvalds kfree_skb(skb); 14351da177e4SLinus Torvalds return 0; 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds #endif 14381da177e4SLinus Torvalds 14390331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14404c563f76STimo Teras 144112a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1442cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14434c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 144412a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14451da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14468d1211a6SAlexey Dobriyan struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u8 type, int dir, 14474e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1448ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1449ef41aaa0SEric Paris int *err); 14508d1211a6SAlexey Dobriyan struct xfrm_policy *xfrm_policy_byid(struct net *net, u8, int dir, u32 id, int delete, int *err); 145133ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14521da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1453658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 14545447c5e4SAlexey Dobriyan struct xfrm_state * xfrm_find_acq(struct net *net, u8 mode, u32 reqid, u8 proto, 14551da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 14561da177e4SLinus Torvalds int create, unsigned short family); 14571da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14585b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 14595b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 14601da177e4SLinus Torvalds 146180c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 146280c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 146313c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 146413c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 146580c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 146680c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 146780c9abaaSShinta Sugimoto struct xfrm_migrate *m); 146880c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 146913c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 147013c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 147180c9abaaSShinta Sugimoto #endif 147280c9abaaSShinta Sugimoto 14735d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14746c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1475db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14761da177e4SLinus Torvalds 14771da177e4SLinus Torvalds extern void xfrm_input_init(void); 14786067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14791da177e4SLinus Torvalds 14801da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14811da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 14821da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 14831da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 14841da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 14851da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 14861da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 14871da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 14881da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 14891da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 14901da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 14911a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 14921a6509d9SHerbert Xu int probe); 14931da177e4SLinus Torvalds 149407d4ee58SHerbert Xu struct hash_desc; 14959409f38aSHerbert Xu struct scatterlist; 149607d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 149707d4ee58SHerbert Xu unsigned int); 14981da177e4SLinus Torvalds 149907d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 15001da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 15011da177e4SLinus Torvalds 15021da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 15031da177e4SLinus Torvalds int family) 15041da177e4SLinus Torvalds { 15051da177e4SLinus Torvalds switch (family) { 15061da177e4SLinus Torvalds default: 15071da177e4SLinus Torvalds case AF_INET: 15088c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 15091da177e4SLinus Torvalds case AF_INET6: 15101da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15111da177e4SLinus Torvalds (struct in6_addr *)b); 15121da177e4SLinus Torvalds } 15131da177e4SLinus Torvalds } 15141da177e4SLinus Torvalds 151577d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 151677d8d7a6SHerbert Xu { 151777d8d7a6SHerbert Xu return index & 7; 151877d8d7a6SHerbert Xu } 151977d8d7a6SHerbert Xu 1520a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1521a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1522f8cd5488SJamal Hadi Salim { 1523be33690dSPatrick McHardy struct sock *nlsk; 1524be33690dSPatrick McHardy int ret = 0; 1525be33690dSPatrick McHardy 1526be33690dSPatrick McHardy rcu_read_lock(); 1527a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1528be33690dSPatrick McHardy if (nlsk) 1529be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1530be33690dSPatrick McHardy rcu_read_unlock(); 1531be33690dSPatrick McHardy return ret; 1532f8cd5488SJamal Hadi Salim } 1533a6483b79SAlexey Dobriyan #endif 1534f8cd5488SJamal Hadi Salim 15350f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 15360f99be0dSEric Dumazet { 15370f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15380f99be0dSEric Dumazet } 15390f99be0dSEric Dumazet 154080c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 154180c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 154280c9abaaSShinta Sugimoto { 15430f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 154480c9abaaSShinta Sugimoto } 154580c9abaaSShinta Sugimoto 154680c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 154780c9abaaSShinta Sugimoto { 154880c9abaaSShinta Sugimoto int i; 154980c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 155080c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 155180c9abaaSShinta Sugimoto } 155280c9abaaSShinta Sugimoto 155380c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 155480c9abaaSShinta Sugimoto { 155580c9abaaSShinta Sugimoto int i; 155680c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 155780c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 155880c9abaaSShinta Sugimoto } 155980c9abaaSShinta Sugimoto #endif 1560f8cd5488SJamal Hadi Salim 1561def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 156200501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 156300501121SHerbert Xu { 156400501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 156500501121SHerbert Xu } 1566def8b4faSAlexey Dobriyan #endif 156700501121SHerbert Xu 15681da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1569