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 1201da177e4SLinus Torvalds /* Full description of state of transformer. */ 1211da177e4SLinus Torvalds struct xfrm_state 1221da177e4SLinus Torvalds { 1231da177e4SLinus Torvalds /* Note: bydst is re-used during gc */ 1248f126e37SDavid S. Miller struct hlist_node bydst; 1258f126e37SDavid S. Miller struct hlist_node bysrc; 1268f126e37SDavid S. Miller struct hlist_node byspi; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds atomic_t refcnt; 1291da177e4SLinus Torvalds spinlock_t lock; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds struct xfrm_id id; 1321da177e4SLinus Torvalds struct xfrm_selector sel; 1331da177e4SLinus Torvalds 1349d4a706dSDavid S. Miller u32 genid; 1359d4a706dSDavid S. Miller 1361da177e4SLinus Torvalds /* Key manger bits */ 1371da177e4SLinus Torvalds struct { 1381da177e4SLinus Torvalds u8 state; 1391da177e4SLinus Torvalds u8 dying; 1401da177e4SLinus Torvalds u32 seq; 1411da177e4SLinus Torvalds } km; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds /* Parameters of this state. */ 1441da177e4SLinus Torvalds struct { 1451da177e4SLinus Torvalds u32 reqid; 1461da177e4SLinus Torvalds u8 mode; 1471da177e4SLinus Torvalds u8 replay_window; 1481da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1491da177e4SLinus Torvalds u8 flags; 1501da177e4SLinus Torvalds u16 family; 1511da177e4SLinus Torvalds xfrm_address_t saddr; 1521da177e4SLinus Torvalds int header_len; 1531da177e4SLinus Torvalds int trailer_len; 1541da177e4SLinus Torvalds } props; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds /* Data for transformer */ 1591da177e4SLinus Torvalds struct xfrm_algo *aalg; 1601da177e4SLinus Torvalds struct xfrm_algo *ealg; 1611da177e4SLinus Torvalds struct xfrm_algo *calg; 1621a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds /* Data for encapsulator */ 1651da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1661da177e4SLinus Torvalds 167060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 168060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 169060f02a3SNoriaki TAKAMIYA 1701da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1711da177e4SLinus Torvalds struct xfrm_state *tunnel; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1741da177e4SLinus Torvalds atomic_t tunnel_users; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds /* State for replay detection */ 1771da177e4SLinus Torvalds struct xfrm_replay_state replay; 1781da177e4SLinus Torvalds 179f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 180f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 181f8cd5488SJamal Hadi Salim 1822717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1832717096aSJamal Hadi Salim * moment 1842717096aSJamal Hadi Salim */ 1852717096aSJamal Hadi Salim u32 xflags; 1862717096aSJamal Hadi Salim 187f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 188f8cd5488SJamal Hadi Salim u32 replay_maxage; 189f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 190f8cd5488SJamal Hadi Salim 191f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 192f8cd5488SJamal Hadi Salim struct timer_list rtimer; 193f8cd5488SJamal Hadi Salim 1941da177e4SLinus Torvalds /* Statistics */ 1951da177e4SLinus Torvalds struct xfrm_stats stats; 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1981da177e4SLinus Torvalds struct timer_list timer; 1991da177e4SLinus Torvalds 2009afaca05SMasahide NAKAMURA /* Last used time */ 201d26f3984SHerbert Xu unsigned long lastused; 2029afaca05SMasahide NAKAMURA 2031da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2041da177e4SLinus Torvalds * transformer. */ 205*533cb5b0SEric Dumazet const struct xfrm_type *type; 20613996378SHerbert Xu struct xfrm_mode *inner_mode; 20713996378SHerbert Xu struct xfrm_mode *outer_mode; 2081da177e4SLinus Torvalds 209df71837dSTrent Jaeger /* Security context */ 210df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 211df71837dSTrent Jaeger 2121da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2131da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2141da177e4SLinus Torvalds void *data; 2151da177e4SLinus Torvalds }; 2161da177e4SLinus Torvalds 2172717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2182717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2192717096aSJamal Hadi Salim 2201da177e4SLinus Torvalds enum { 2211da177e4SLinus Torvalds XFRM_STATE_VOID, 2221da177e4SLinus Torvalds XFRM_STATE_ACQ, 2231da177e4SLinus Torvalds XFRM_STATE_VALID, 2241da177e4SLinus Torvalds XFRM_STATE_ERROR, 2251da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2261da177e4SLinus Torvalds XFRM_STATE_DEAD 2271da177e4SLinus Torvalds }; 2281da177e4SLinus Torvalds 22926b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 23026b15dadSJamal Hadi Salim struct km_event 23126b15dadSJamal Hadi Salim { 232bf08867fSHerbert Xu union { 233bf08867fSHerbert Xu u32 hard; 234bf08867fSHerbert Xu u32 proto; 235bf08867fSHerbert Xu u32 byid; 236f8cd5488SJamal Hadi Salim u32 aevent; 237f7b6983fSMasahide NAKAMURA u32 type; 238bf08867fSHerbert Xu } data; 239bf08867fSHerbert Xu 24026b15dadSJamal Hadi Salim u32 seq; 24126b15dadSJamal Hadi Salim u32 pid; 24226b15dadSJamal Hadi Salim u32 event; 24326b15dadSJamal Hadi Salim }; 24426b15dadSJamal Hadi Salim 24525ee3286SHerbert Xu struct net_device; 2461da177e4SLinus Torvalds struct xfrm_type; 2471da177e4SLinus Torvalds struct xfrm_dst; 2481da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2491da177e4SLinus Torvalds unsigned short family; 2501da177e4SLinus Torvalds struct dst_ops *dst_ops; 2511da177e4SLinus Torvalds void (*garbage_collect)(void); 25266cdb3caSHerbert Xu struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, 25366cdb3caSHerbert Xu xfrm_address_t *daddr); 254a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2551da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2561da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 257d5422efeSHerbert Xu struct flowi *fl, 258d5422efeSHerbert Xu int reverse); 25925ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 260a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 261a1b05140SMasahide NAKAMURA struct dst_entry *dst, 262a1b05140SMasahide NAKAMURA int nfheader_len); 26325ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 26425ee3286SHerbert Xu struct net_device *dev); 2651da177e4SLinus Torvalds }; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2681da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 26926b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 27026b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds struct xfrm_tmpl; 273980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 27453bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 27553bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 27653bc6b4dSJamal Hadi Salim 2771da177e4SLinus Torvalds struct xfrm_state_afinfo { 27817c2a42aSHerbert Xu unsigned int family; 27936cf9acfSHerbert Xu unsigned int proto; 280227620e2SHerbert Xu unsigned int eth_proto; 28117c2a42aSHerbert Xu struct module *owner; 282*533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 283aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 284d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2851da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2861da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2871da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 28841a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 28941a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 290cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 291227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 292227620e2SHerbert Xu struct sk_buff *skb); 29336cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 29436cf9acfSHerbert Xu struct sk_buff *skb); 295716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 296716062fdSHerbert Xu int async); 2971da177e4SLinus Torvalds }; 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3001da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds struct xfrm_type 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds char *description; 3071da177e4SLinus Torvalds struct module *owner; 3081da177e4SLinus Torvalds __u8 proto; 3091b5c2299SMasahide NAKAMURA __u8 flags; 3101b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 311436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 312f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 313f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3141da177e4SLinus Torvalds 31572cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3161da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 317e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3181da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 319df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 320aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3211da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 322c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3231da177e4SLinus Torvalds }; 3241da177e4SLinus Torvalds 325*533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 326*533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3271da177e4SLinus Torvalds 328b59f45d0SHerbert Xu struct xfrm_mode { 329227620e2SHerbert Xu /* 330227620e2SHerbert Xu * Remove encapsulation header. 331227620e2SHerbert Xu * 332227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 333227620e2SHerbert Xu * header. 334227620e2SHerbert Xu * 335227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 336227620e2SHerbert Xu * should be and the network header shall be set to where the IP 337227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 338227620e2SHerbert Xu * payload. 339227620e2SHerbert Xu */ 340227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 341227620e2SHerbert Xu 342227620e2SHerbert Xu /* 343227620e2SHerbert Xu * This is the actual input entry point. 344227620e2SHerbert Xu * 345227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 346227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 347227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 348227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 349227620e2SHerbert Xu */ 350b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 35137fedd3aSHerbert Xu 35237fedd3aSHerbert Xu /* 35337fedd3aSHerbert Xu * Add encapsulation header. 35437fedd3aSHerbert Xu * 35537fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 35637fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 35737fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 35837fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 35937fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 36037fedd3aSHerbert Xu * header. The value of the network header will always point 36137fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 36237fedd3aSHerbert Xu */ 36336cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 36436cf9acfSHerbert Xu 36536cf9acfSHerbert Xu /* 36636cf9acfSHerbert Xu * This is the actual output entry point. 36736cf9acfSHerbert Xu * 36836cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 36936cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 37036cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 37136cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 37236cf9acfSHerbert Xu * call output2. 37336cf9acfSHerbert Xu */ 374eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 375b59f45d0SHerbert Xu 37617c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 377b59f45d0SHerbert Xu struct module *owner; 378b59f45d0SHerbert Xu unsigned int encap; 3791bfcb10fSHerbert Xu int flags; 3801bfcb10fSHerbert Xu }; 3811bfcb10fSHerbert Xu 3821bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3831bfcb10fSHerbert Xu enum { 3841bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 385b59f45d0SHerbert Xu }; 386b59f45d0SHerbert Xu 387b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 388b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 389b59f45d0SHerbert Xu 3901da177e4SLinus Torvalds struct xfrm_tmpl 3911da177e4SLinus Torvalds { 3921da177e4SLinus Torvalds /* id in template is interpreted as: 3931da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3941da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3951da177e4SLinus Torvalds * daddr must be fixed too. 3961da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3971da177e4SLinus Torvalds */ 3981da177e4SLinus Torvalds struct xfrm_id id; 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4011da177e4SLinus Torvalds xfrm_address_t saddr; 4021da177e4SLinus Torvalds 40376b3f055SMiika Komu unsigned short encap_family; 40476b3f055SMiika Komu 4051da177e4SLinus Torvalds __u32 reqid; 4061da177e4SLinus Torvalds 4077e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 4081da177e4SLinus Torvalds __u8 mode; 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 4111da177e4SLinus Torvalds __u8 share; 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 4141da177e4SLinus Torvalds __u8 optional; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 4171da177e4SLinus Torvalds __u32 aalgos; 4181da177e4SLinus Torvalds __u32 ealgos; 4191da177e4SLinus Torvalds __u32 calgos; 4201da177e4SLinus Torvalds }; 4211da177e4SLinus Torvalds 422622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4231da177e4SLinus Torvalds 4241da177e4SLinus Torvalds struct xfrm_policy 4251da177e4SLinus Torvalds { 4261da177e4SLinus Torvalds struct xfrm_policy *next; 4272518c7c2SDavid S. Miller struct hlist_node bydst; 4282518c7c2SDavid S. Miller struct hlist_node byidx; 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4311da177e4SLinus Torvalds rwlock_t lock; 4321da177e4SLinus Torvalds atomic_t refcnt; 4331da177e4SLinus Torvalds struct timer_list timer; 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds u32 priority; 4361da177e4SLinus Torvalds u32 index; 4371da177e4SLinus Torvalds struct xfrm_selector selector; 4381da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4391da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 4401da177e4SLinus Torvalds struct dst_entry *bundles; 44146ca5f5dSArnaldo Carvalho de Melo u16 family; 44246ca5f5dSArnaldo Carvalho de Melo u8 type; 44346ca5f5dSArnaldo Carvalho de Melo u8 action; 44446ca5f5dSArnaldo Carvalho de Melo u8 flags; 44546ca5f5dSArnaldo Carvalho de Melo u8 dead; 44646ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 44746ca5f5dSArnaldo Carvalho de Melo /* XXX 1 byte hole, try to pack */ 448df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 4491da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 4501da177e4SLinus Torvalds }; 4511da177e4SLinus Torvalds 45280c9abaaSShinta Sugimoto struct xfrm_migrate { 45380c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 45480c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 45580c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 45680c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 45780c9abaaSShinta Sugimoto u8 proto; 45880c9abaaSShinta Sugimoto u8 mode; 45980c9abaaSShinta Sugimoto u16 reserved; 46080c9abaaSShinta Sugimoto u32 reqid; 46180c9abaaSShinta Sugimoto u16 old_family; 46280c9abaaSShinta Sugimoto u16 new_family; 46380c9abaaSShinta Sugimoto }; 46480c9abaaSShinta Sugimoto 4651da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 466f8cd5488SJamal Hadi Salim /* which seqno */ 467f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 468f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 469f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 470f8cd5488SJamal Hadi Salim /* what happened */ 471f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 472f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 473f8cd5488SJamal Hadi Salim 474f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 475f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 476f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 477f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 478f8cd5488SJamal Hadi Salim /* default seq threshold size */ 479f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds struct xfrm_mgr 4821da177e4SLinus Torvalds { 4831da177e4SLinus Torvalds struct list_head list; 4841da177e4SLinus Torvalds char *id; 48526b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 4861da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 487cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 4885d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 48926b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 49097a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 49180c9abaaSShinta Sugimoto int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); 4921da177e4SLinus Torvalds }; 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 4951da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 4961da177e4SLinus Torvalds 4972518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 4981da177e4SLinus Torvalds 499436a0a40SHerbert Xu /* 500436a0a40SHerbert Xu * This structure is used for the duration where packets are being 501436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 502436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 503436a0a40SHerbert Xu */ 504436a0a40SHerbert Xu struct xfrm_skb_cb { 505436a0a40SHerbert Xu union { 506436a0a40SHerbert Xu struct inet_skb_parm h4; 507436a0a40SHerbert Xu struct inet6_skb_parm h6; 508436a0a40SHerbert Xu } header; 509436a0a40SHerbert Xu 510436a0a40SHerbert Xu /* Sequence number for replay protection. */ 511436a0a40SHerbert Xu u64 seq; 512436a0a40SHerbert Xu }; 513436a0a40SHerbert Xu 514436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 515436a0a40SHerbert Xu 51636cf9acfSHerbert Xu /* 51736cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 51836cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 51936cf9acfSHerbert Xu */ 52036cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 52136cf9acfSHerbert Xu union { 52236cf9acfSHerbert Xu struct inet_skb_parm h4; 52336cf9acfSHerbert Xu struct inet6_skb_parm h6; 52436cf9acfSHerbert Xu } header; 52536cf9acfSHerbert Xu 52636cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 52736cf9acfSHerbert Xu __be16 id; 52836cf9acfSHerbert Xu __be16 frag_off; 52936cf9acfSHerbert Xu 53036cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 53136cf9acfSHerbert Xu u8 tos; 53236cf9acfSHerbert Xu 53336cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 53436cf9acfSHerbert Xu u8 ttl; 53536cf9acfSHerbert Xu 53636cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 53736cf9acfSHerbert Xu u8 protocol; 53836cf9acfSHerbert Xu 53936cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 54036cf9acfSHerbert Xu u8 flow_lbl[3]; 54136cf9acfSHerbert Xu }; 54236cf9acfSHerbert Xu 54336cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 54436cf9acfSHerbert Xu 545716062fdSHerbert Xu /* 546716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 547716062fdSHerbert Xu * related information. 548716062fdSHerbert Xu */ 549716062fdSHerbert Xu struct xfrm_spi_skb_cb { 550716062fdSHerbert Xu union { 551716062fdSHerbert Xu struct inet_skb_parm h4; 552716062fdSHerbert Xu struct inet6_skb_parm h6; 553716062fdSHerbert Xu } header; 554716062fdSHerbert Xu 555716062fdSHerbert Xu unsigned int daddroff; 5562fcb45b6SHerbert Xu unsigned int family; 557716062fdSHerbert Xu }; 558716062fdSHerbert Xu 559716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 560716062fdSHerbert Xu 561161a09e7SJoy Latten /* Audit Information */ 562161a09e7SJoy Latten struct xfrm_audit 563161a09e7SJoy Latten { 564ab5f5e8bSJoy Latten u32 loginuid; 565161a09e7SJoy Latten u32 secid; 566161a09e7SJoy Latten }; 567c9204d9cSJoy Latten 568c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 569afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 570ab5f5e8bSJoy Latten { 571ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 572ab5f5e8bSJoy Latten 573afeb14b4SPaul Moore if (audit_enabled == 0) 574afeb14b4SPaul Moore return NULL; 575ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 576ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 577ab5f5e8bSJoy Latten if (audit_buf == NULL) 578ab5f5e8bSJoy Latten return NULL; 579afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 580afeb14b4SPaul Moore return audit_buf; 581afeb14b4SPaul Moore } 582afeb14b4SPaul Moore 583afeb14b4SPaul Moore static inline void xfrm_audit_helper_usrinfo(u32 auid, u32 secid, 584afeb14b4SPaul Moore struct audit_buffer *audit_buf) 585afeb14b4SPaul Moore { 586afeb14b4SPaul Moore char *secctx; 587afeb14b4SPaul Moore u32 secctx_len; 588ab5f5e8bSJoy Latten 589ab5f5e8bSJoy Latten audit_log_format(audit_buf, " auid=%u", auid); 59068277accSPaul Moore if (secid != 0 && 59168277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 592ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 593ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 594ab5f5e8bSJoy Latten } else 595ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 596ab5f5e8bSJoy Latten } 597ab5f5e8bSJoy Latten 598ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 59968277accSPaul Moore u32 auid, u32 secid); 600ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 60168277accSPaul Moore u32 auid, u32 secid); 602ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 60368277accSPaul Moore u32 auid, u32 secid); 604ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 60568277accSPaul Moore u32 auid, u32 secid); 606afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 607afeb14b4SPaul Moore struct sk_buff *skb); 608afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 609afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 610afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 611afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 612afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 613c9204d9cSJoy Latten #else 614ab5f5e8bSJoy Latten #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) 615ab5f5e8bSJoy Latten #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) 616ab5f5e8bSJoy Latten #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) 617ab5f5e8bSJoy Latten #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) 618afeb14b4SPaul Moore #define xfrm_audit_state_replay_overflow(x, s) do { ; } while (0) 619afeb14b4SPaul Moore #define xfrm_audit_state_notfound_simple(s, f) do { ; } while (0) 620afeb14b4SPaul Moore #define xfrm_audit_state_notfound(s, f, sp, sq) do { ; } while (0) 621afeb14b4SPaul Moore #define xfrm_audit_state_icvfail(x, s, p) do { ; } while (0) 622c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 623161a09e7SJoy Latten 6241da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 6251da177e4SLinus Torvalds { 6261da177e4SLinus Torvalds if (likely(policy != NULL)) 6271da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds 63064c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 6331da177e4SLinus Torvalds { 6341da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 63564c31b3fSWANG Cong xfrm_policy_destroy(policy); 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds 6384e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 6394e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6404e81bb83SMasahide NAKAMURA { 6414e81bb83SMasahide NAKAMURA int i; 6424e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 6434e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 6444e81bb83SMasahide NAKAMURA } 6454e81bb83SMasahide NAKAMURA #else 6464e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6474e81bb83SMasahide NAKAMURA { 6484e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 6494e81bb83SMasahide NAKAMURA } 6504e81bb83SMasahide NAKAMURA #endif 6514e81bb83SMasahide NAKAMURA 6521da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 6531da177e4SLinus Torvalds 65421380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 65521380b81SHerbert Xu { 65621380b81SHerbert Xu atomic_dec(&x->refcnt); 65721380b81SHerbert Xu } 65821380b81SHerbert Xu 6591da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 6601da177e4SLinus Torvalds { 6611da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 6621da177e4SLinus Torvalds __xfrm_state_destroy(x); 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 6661da177e4SLinus Torvalds { 6671da177e4SLinus Torvalds atomic_inc(&x->refcnt); 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 6711da177e4SLinus Torvalds { 6725f19343fSAl Viro __be32 *a1 = token1; 6735f19343fSAl Viro __be32 *a2 = token2; 6741da177e4SLinus Torvalds int pdw; 6751da177e4SLinus Torvalds int pbi; 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 6781da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds if (pdw) 6811da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 6821da177e4SLinus Torvalds return 0; 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds if (pbi) { 6855f19343fSAl Viro __be32 mask; 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 6901da177e4SLinus Torvalds return 0; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds return 1; 6941da177e4SLinus Torvalds } 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds static __inline__ 697f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 6981da177e4SLinus Torvalds { 699f9d07e41SAl Viro __be16 port; 7001da177e4SLinus Torvalds switch(fl->proto) { 7011da177e4SLinus Torvalds case IPPROTO_TCP: 7021da177e4SLinus Torvalds case IPPROTO_UDP: 703ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 7041da177e4SLinus Torvalds case IPPROTO_SCTP: 7051da177e4SLinus Torvalds port = fl->fl_ip_sport; 7061da177e4SLinus Torvalds break; 7071da177e4SLinus Torvalds case IPPROTO_ICMP: 7081da177e4SLinus Torvalds case IPPROTO_ICMPV6: 7091da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 7101da177e4SLinus Torvalds break; 7112ce4272aSMasahide NAKAMURA case IPPROTO_MH: 7122ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 7132ce4272aSMasahide NAKAMURA break; 7141da177e4SLinus Torvalds default: 7151da177e4SLinus Torvalds port = 0; /*XXX*/ 7161da177e4SLinus Torvalds } 7171da177e4SLinus Torvalds return port; 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds static __inline__ 721f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 7221da177e4SLinus Torvalds { 723f9d07e41SAl Viro __be16 port; 7241da177e4SLinus Torvalds switch(fl->proto) { 7251da177e4SLinus Torvalds case IPPROTO_TCP: 7261da177e4SLinus Torvalds case IPPROTO_UDP: 727ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 7281da177e4SLinus Torvalds case IPPROTO_SCTP: 7291da177e4SLinus Torvalds port = fl->fl_ip_dport; 7301da177e4SLinus Torvalds break; 7311da177e4SLinus Torvalds case IPPROTO_ICMP: 7321da177e4SLinus Torvalds case IPPROTO_ICMPV6: 7331da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 7341da177e4SLinus Torvalds break; 7351da177e4SLinus Torvalds default: 7361da177e4SLinus Torvalds port = 0; /*XXX*/ 7371da177e4SLinus Torvalds } 7381da177e4SLinus Torvalds return port; 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds 74177681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 74277681021SAndrew Morton unsigned short family); 7431da177e4SLinus Torvalds 744df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 745df71837dSTrent Jaeger /* If neither has a context --> match 746df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 747df71837dSTrent Jaeger */ 748df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 749df71837dSTrent Jaeger { 750df71837dSTrent Jaeger return ((!s1 && !s2) || 751df71837dSTrent Jaeger (s1 && s2 && 752df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 753df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 754df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 755df71837dSTrent Jaeger } 756df71837dSTrent Jaeger #else 757df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 758df71837dSTrent Jaeger { 759df71837dSTrent Jaeger return 1; 760df71837dSTrent Jaeger } 761df71837dSTrent Jaeger #endif 762df71837dSTrent Jaeger 7631da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 7641da177e4SLinus Torvalds * 7651da177e4SLinus Torvalds * dst->child points to the next element of bundle. 7661da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 7671da177e4SLinus Torvalds * 7681da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 7691da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 7701da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 7711da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 7721da177e4SLinus Torvalds * policy rule. 7731da177e4SLinus Torvalds */ 7741da177e4SLinus Torvalds struct xfrm_dst 7751da177e4SLinus Torvalds { 7761da177e4SLinus Torvalds union { 7771da177e4SLinus Torvalds struct dst_entry dst; 7781da177e4SLinus Torvalds struct rtable rt; 7791da177e4SLinus Torvalds struct rt6_info rt6; 7801da177e4SLinus Torvalds } u; 7811da177e4SLinus Torvalds struct dst_entry *route; 782157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 783157bfc25SMasahide NAKAMURA struct flowi *origin; 784157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 785157bfc25SMasahide NAKAMURA #endif 7869d4a706dSDavid S. Miller u32 genid; 7871da177e4SLinus Torvalds u32 route_mtu_cached; 7881da177e4SLinus Torvalds u32 child_mtu_cached; 78992d63decSHideaki YOSHIFUJI u32 route_cookie; 79092d63decSHideaki YOSHIFUJI u32 path_cookie; 7911da177e4SLinus Torvalds }; 7921da177e4SLinus Torvalds 793aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 794aabc9761SHerbert Xu { 795aabc9761SHerbert Xu dst_release(xdst->route); 796aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 797aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 798157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 799157bfc25SMasahide NAKAMURA kfree(xdst->origin); 800157bfc25SMasahide NAKAMURA xdst->origin = NULL; 801157bfc25SMasahide NAKAMURA kfree(xdst->partner); 802157bfc25SMasahide NAKAMURA xdst->partner = NULL; 803157bfc25SMasahide NAKAMURA #endif 804aabc9761SHerbert Xu } 805aabc9761SHerbert Xu 806aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 807aabc9761SHerbert Xu 8081da177e4SLinus Torvalds struct sec_path 8091da177e4SLinus Torvalds { 8101da177e4SLinus Torvalds atomic_t refcnt; 8111da177e4SLinus Torvalds int len; 812dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 8131da177e4SLinus Torvalds }; 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds static inline struct sec_path * 8161da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 8171da177e4SLinus Torvalds { 8181da177e4SLinus Torvalds if (sp) 8191da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 8201da177e4SLinus Torvalds return sp; 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds static inline void 8261da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 8271da177e4SLinus Torvalds { 8281da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 8291da177e4SLinus Torvalds __secpath_destroy(sp); 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds static inline void 8351da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 8361da177e4SLinus Torvalds { 8371da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8381da177e4SLinus Torvalds secpath_put(skb->sp); 8391da177e4SLinus Torvalds skb->sp = NULL; 8401da177e4SLinus Torvalds #endif 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds static inline int 844a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 845a1e59abfSPatrick McHardy { 846a1e59abfSPatrick McHardy switch (family) { 847a1e59abfSPatrick McHardy case AF_INET: 848a1e59abfSPatrick McHardy return addr->a4 == 0; 849a1e59abfSPatrick McHardy case AF_INET6: 850a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 851a1e59abfSPatrick McHardy } 852a1e59abfSPatrick McHardy return 0; 853a1e59abfSPatrick McHardy } 854a1e59abfSPatrick McHardy 855a1e59abfSPatrick McHardy static inline int 8561da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8571da177e4SLinus Torvalds { 8581da177e4SLinus Torvalds return (tmpl->saddr.a4 && 8591da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds static inline int 8631da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8641da177e4SLinus Torvalds { 8651da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 8661da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 8671da177e4SLinus Torvalds } 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds static inline int 8701da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 8711da177e4SLinus Torvalds { 8721da177e4SLinus Torvalds switch (family) { 8731da177e4SLinus Torvalds case AF_INET: 8741da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 8751da177e4SLinus Torvalds case AF_INET6: 8761da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds return !0; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8821da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 8831da177e4SLinus Torvalds 884d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 885d5422efeSHerbert Xu struct sk_buff *skb, 886d5422efeSHerbert Xu unsigned int family, int reverse) 8871da177e4SLinus Torvalds { 888d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 889d5422efeSHerbert Xu 8901da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 891d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 8921da177e4SLinus Torvalds 8932518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 8941da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 895d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 896d5422efeSHerbert Xu } 897d5422efeSHerbert Xu 898d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 899d5422efeSHerbert Xu { 900d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 9011da177e4SLinus Torvalds } 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9041da177e4SLinus Torvalds { 9051da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 9061da177e4SLinus Torvalds } 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9091da177e4SLinus Torvalds { 9101da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds 913d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 914d5422efeSHerbert Xu struct sk_buff *skb) 915d5422efeSHerbert Xu { 916d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 917d5422efeSHerbert Xu } 918d5422efeSHerbert Xu 919d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 920d5422efeSHerbert Xu struct sk_buff *skb) 921d5422efeSHerbert Xu { 922d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 923d5422efeSHerbert Xu } 924d5422efeSHerbert Xu 925d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 926d5422efeSHerbert Xu unsigned int family, int reverse); 927d5422efeSHerbert Xu 928d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 929d5422efeSHerbert Xu unsigned int family) 930d5422efeSHerbert Xu { 931d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 932d5422efeSHerbert Xu } 933d5422efeSHerbert Xu 934d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 935d5422efeSHerbert Xu struct flowi *fl, 936d5422efeSHerbert Xu unsigned int family) 937d5422efeSHerbert Xu { 938d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 939d5422efeSHerbert Xu } 940d5422efeSHerbert Xu 9411da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 9441da177e4SLinus Torvalds { 9452518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 9461da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 9471da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 9511da177e4SLinus Torvalds { 9521da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 9561da177e4SLinus Torvalds { 9571da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 9631da177e4SLinus Torvalds { 9641da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 9651da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 9661da177e4SLinus Torvalds return 0; 9671da177e4SLinus Torvalds } 9681da177e4SLinus Torvalds 9694666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 9721da177e4SLinus Torvalds { 9731da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 9741da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 9751da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 9781da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 9791da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds } 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds #else 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 9861da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 9871da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 9881da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 9891da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9901da177e4SLinus Torvalds { 9911da177e4SLinus Torvalds return 1; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9941da177e4SLinus Torvalds { 9951da177e4SLinus Torvalds return 1; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 9981da177e4SLinus Torvalds { 9991da177e4SLinus Torvalds return 1; 10001da177e4SLinus Torvalds } 1001d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1002d5422efeSHerbert Xu struct flowi *fl, 1003d5422efeSHerbert Xu unsigned int family) 1004d5422efeSHerbert Xu { 1005d5422efeSHerbert Xu return -ENOSYS; 1006d5422efeSHerbert Xu } 1007d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1008d5422efeSHerbert Xu struct sk_buff *skb) 1009d5422efeSHerbert Xu { 1010d5422efeSHerbert Xu return 1; 1011d5422efeSHerbert Xu } 1012d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1013d5422efeSHerbert Xu struct sk_buff *skb) 1014d5422efeSHerbert Xu { 1015d5422efeSHerbert Xu return 1; 1016d5422efeSHerbert Xu } 10171da177e4SLinus Torvalds #endif 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds static __inline__ 10201da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 10211da177e4SLinus Torvalds { 10221da177e4SLinus Torvalds switch (family){ 10231da177e4SLinus Torvalds case AF_INET: 10241da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 10251da177e4SLinus Torvalds case AF_INET6: 10261da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds return NULL; 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds 10311da177e4SLinus Torvalds static __inline__ 10321da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 10331da177e4SLinus Torvalds { 10341da177e4SLinus Torvalds switch (family){ 10351da177e4SLinus Torvalds case AF_INET: 10361da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 10371da177e4SLinus Torvalds case AF_INET6: 10381da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds return NULL; 10411da177e4SLinus Torvalds } 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds static __inline__ int 10441da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 10451da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 10461da177e4SLinus Torvalds { 10471da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 10481da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 10491da177e4SLinus Torvalds return 1; 10501da177e4SLinus Torvalds return 0; 10511da177e4SLinus Torvalds } 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds static __inline__ int 10541da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 10551da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 10561da177e4SLinus Torvalds { 10571da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 10581da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 10591da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 10601da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 10611da177e4SLinus Torvalds return 1; 10621da177e4SLinus Torvalds return 0; 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds static __inline__ int 10661da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 10671da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 10681da177e4SLinus Torvalds unsigned short family) 10691da177e4SLinus Torvalds { 10701da177e4SLinus Torvalds switch (family) { 10711da177e4SLinus Torvalds case AF_INET: 10721da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 10731da177e4SLinus Torvalds case AF_INET6: 10741da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds return 0; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 1079e53820deSMasahide NAKAMURA static __inline__ int 1080e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1081e53820deSMasahide NAKAMURA unsigned short family) 1082e53820deSMasahide NAKAMURA { 1083e53820deSMasahide NAKAMURA switch (family) { 1084e53820deSMasahide NAKAMURA case AF_INET: 1085e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1086e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1087e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1088e53820deSMasahide NAKAMURA case AF_INET6: 1089e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1090e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1091e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1092e53820deSMasahide NAKAMURA } 1093e53820deSMasahide NAKAMURA return 0; 1094e53820deSMasahide NAKAMURA } 1095e53820deSMasahide NAKAMURA 10961da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 10971da177e4SLinus Torvalds { 10981da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 10991da177e4SLinus Torvalds } 11001da177e4SLinus Torvalds 11015794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 11025794708fSMasahide NAKAMURA { 1103dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1104dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1105dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1106dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 11075794708fSMasahide NAKAMURA } 11085794708fSMasahide NAKAMURA 11091da177e4SLinus Torvalds /* 11101da177e4SLinus Torvalds * xfrm algorithm information 11111da177e4SLinus Torvalds */ 11121a6509d9SHerbert Xu struct xfrm_algo_aead_info { 11131a6509d9SHerbert Xu u16 icv_truncbits; 11141a6509d9SHerbert Xu }; 11151a6509d9SHerbert Xu 11161da177e4SLinus Torvalds struct xfrm_algo_auth_info { 11171da177e4SLinus Torvalds u16 icv_truncbits; 11181da177e4SLinus Torvalds u16 icv_fullbits; 11191da177e4SLinus Torvalds }; 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds struct xfrm_algo_encr_info { 11221da177e4SLinus Torvalds u16 blockbits; 11231da177e4SLinus Torvalds u16 defkeybits; 11241da177e4SLinus Torvalds }; 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds struct xfrm_algo_comp_info { 11271da177e4SLinus Torvalds u16 threshold; 11281da177e4SLinus Torvalds }; 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds struct xfrm_algo_desc { 11311da177e4SLinus Torvalds char *name; 113204ff1260SHerbert Xu char *compat; 11331da177e4SLinus Torvalds u8 available:1; 11341da177e4SLinus Torvalds union { 11351a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 11361da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 11371da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 11381da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 11391da177e4SLinus Torvalds } uinfo; 11401da177e4SLinus Torvalds struct sadb_alg desc; 11411da177e4SLinus Torvalds }; 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 11441da177e4SLinus Torvalds struct xfrm_tunnel { 11451da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1146d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1147d2acc347SHerbert Xu 1148d2acc347SHerbert Xu struct xfrm_tunnel *next; 1149d2acc347SHerbert Xu int priority; 11501da177e4SLinus Torvalds }; 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds struct xfrm6_tunnel { 1153d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1154d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 115504ce6909SAl Viro int type, int code, int offset, __be32 info); 1156d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1157d2acc347SHerbert Xu int priority; 11581da177e4SLinus Torvalds }; 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds extern void xfrm_init(void); 11611da177e4SLinus Torvalds extern void xfrm4_init(void); 11621da177e4SLinus Torvalds extern void xfrm_state_init(void); 11631da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1164c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1165c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1166c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 11670013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 11681da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1169c35b7e72SDaniel Lezcano #else 1170c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1171c35b7e72SDaniel Lezcano { 1172c35b7e72SDaniel Lezcano return 0; 1173c35b7e72SDaniel Lezcano } 1174c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1175c35b7e72SDaniel Lezcano { 1176c35b7e72SDaniel Lezcano ; 1177c35b7e72SDaniel Lezcano } 1178c35b7e72SDaniel Lezcano #endif 11791da177e4SLinus Torvalds 1180558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1181558f82efSMasahide NAKAMURA extern int xfrm_proc_init(void); 1182558f82efSMasahide NAKAMURA #endif 1183558f82efSMasahide NAKAMURA 11841da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 11851da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 11861da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 11871da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 11881da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 11891da177e4SLinus Torvalds unsigned short family); 1190628529b6SJamal Hadi Salim extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, 1191628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1192628529b6SJamal Hadi Salim unsigned short family, 1193628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 11941da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 11951da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 11961da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 11971da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1198a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1199eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 120041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 120141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 120241a49cc3SMasahide NAKAMURA int n, unsigned short family); 120341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 120441a49cc3SMasahide NAKAMURA int n, unsigned short family); 120541a49cc3SMasahide NAKAMURA #else 120641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 120741a49cc3SMasahide NAKAMURA int n, unsigned short family) 120841a49cc3SMasahide NAKAMURA { 120941a49cc3SMasahide NAKAMURA return -ENOSYS; 121041a49cc3SMasahide NAKAMURA } 121141a49cc3SMasahide NAKAMURA 121241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 121341a49cc3SMasahide NAKAMURA int n, unsigned short family) 121441a49cc3SMasahide NAKAMURA { 121541a49cc3SMasahide NAKAMURA return -ENOSYS; 121641a49cc3SMasahide NAKAMURA } 121741a49cc3SMasahide NAKAMURA #endif 1218af11e316SJamal Hadi Salim 1219af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1220af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1221af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1222af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1223af11e316SJamal Hadi Salim }; 1224af11e316SJamal Hadi Salim 12255a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 12265a6d3416SJamal Hadi Salim u32 incnt; 12275a6d3416SJamal Hadi Salim u32 outcnt; 12285a6d3416SJamal Hadi Salim u32 fwdcnt; 12295a6d3416SJamal Hadi Salim u32 inscnt; 12305a6d3416SJamal Hadi Salim u32 outscnt; 12315a6d3416SJamal Hadi Salim u32 fwdscnt; 12325a6d3416SJamal Hadi Salim u32 spdhcnt; 12335a6d3416SJamal Hadi Salim u32 spdhmcnt; 12345a6d3416SJamal Hadi Salim }; 12355a6d3416SJamal Hadi Salim 12361da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 123726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 12384aa2e62cSJoy Latten extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 1239af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 12405a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1241afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1242afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 124361f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1244f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 12451da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 124672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1247227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1248716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1249716062fdSHerbert Xu int encap_type); 12501bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1251c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1252406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 125336cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1254227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1255c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1256c4541b41SHerbert Xu int encap_type); 1257716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 12581da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1259c4541b41SHerbert Xu 1260c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1261c4541b41SHerbert Xu { 1262c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1263c4541b41SHerbert Xu } 1264c4541b41SHerbert Xu 126536cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 126636cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 12671da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1268c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1269c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 127036cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1271227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 127233b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1273716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1274e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1275fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1276fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 127773d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 127873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 12798c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 12801da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 12818c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 128236cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 128336cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 12841da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1285aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1286aee5adb4SMasahide NAKAMURA u8 **prevhdr); 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1289067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 12901da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 12911da177e4SLinus Torvalds #else 12921da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 12931da177e4SLinus Torvalds { 12941da177e4SLinus Torvalds return -ENOPROTOOPT; 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds 1297067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 12981da177e4SLinus Torvalds { 12991da177e4SLinus Torvalds /* should not happen */ 13001da177e4SLinus Torvalds kfree_skb(skb); 13011da177e4SLinus Torvalds return 0; 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds #endif 13041da177e4SLinus Torvalds 1305dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 13064e81bb83SMasahide NAKAMURA extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); 13071da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 13084e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 13094e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1310ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1311ef41aaa0SEric Paris int *err); 1312ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 13134aa2e62cSJoy Latten int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 13141da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1315658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 13161da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 13171da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 13181da177e4SLinus Torvalds int create, unsigned short family); 13191da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 13205b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 13215b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 13221da177e4SLinus Torvalds 132380c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 132480c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 132580c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 132680c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 132780c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 132880c9abaaSShinta Sugimoto struct xfrm_migrate *m); 132980c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 133080c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 133180c9abaaSShinta Sugimoto #endif 133280c9abaaSShinta Sugimoto 13331da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 13345d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 13356c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 133697a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds extern void xfrm_input_init(void); 13396067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 13401da177e4SLinus Torvalds 13411da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 13421da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 13431da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 13441da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 13451da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 13461da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 13471da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 13481da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 13491da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 13501da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 13511da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 13521a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 13531a6509d9SHerbert Xu int probe); 13541da177e4SLinus Torvalds 135507d4ee58SHerbert Xu struct hash_desc; 13569409f38aSHerbert Xu struct scatterlist; 135707d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 135807d4ee58SHerbert Xu unsigned int); 13591da177e4SLinus Torvalds 136007d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 13611da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 13641da177e4SLinus Torvalds int family) 13651da177e4SLinus Torvalds { 13661da177e4SLinus Torvalds switch (family) { 13671da177e4SLinus Torvalds default: 13681da177e4SLinus Torvalds case AF_INET: 13698c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 13701da177e4SLinus Torvalds case AF_INET6: 13711da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 13721da177e4SLinus Torvalds (struct in6_addr *)b); 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds } 13751da177e4SLinus Torvalds 137677d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 137777d8d7a6SHerbert Xu { 137877d8d7a6SHerbert Xu return index & 7; 137977d8d7a6SHerbert Xu } 138077d8d7a6SHerbert Xu 1381f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1382f8cd5488SJamal Hadi Salim { 1383be33690dSPatrick McHardy struct sock *nlsk; 1384be33690dSPatrick McHardy int ret = 0; 1385be33690dSPatrick McHardy 1386be33690dSPatrick McHardy rcu_read_lock(); 1387be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1388be33690dSPatrick McHardy if (nlsk) 1389be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1390be33690dSPatrick McHardy rcu_read_unlock(); 1391be33690dSPatrick McHardy return ret; 1392f8cd5488SJamal Hadi Salim } 1393f8cd5488SJamal Hadi Salim 13940f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 13950f99be0dSEric Dumazet { 13960f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 13970f99be0dSEric Dumazet } 13980f99be0dSEric Dumazet 139980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 140080c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 140180c9abaaSShinta Sugimoto { 14020f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 140380c9abaaSShinta Sugimoto } 140480c9abaaSShinta Sugimoto 140580c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 140680c9abaaSShinta Sugimoto { 140780c9abaaSShinta Sugimoto int i; 140880c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 140980c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 141080c9abaaSShinta Sugimoto } 141180c9abaaSShinta Sugimoto 141280c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 141380c9abaaSShinta Sugimoto { 141480c9abaaSShinta Sugimoto int i; 141580c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 141680c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 141780c9abaaSShinta Sugimoto } 141880c9abaaSShinta Sugimoto #endif 1419f8cd5488SJamal Hadi Salim 142000501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 142100501121SHerbert Xu { 142200501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 142300501121SHerbert Xu } 142400501121SHerbert Xu 14251da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1426