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 */ 1244c563f76STimo Teras struct list_head all; 1258f126e37SDavid S. Miller struct hlist_node bydst; 1268f126e37SDavid S. Miller struct hlist_node bysrc; 1278f126e37SDavid S. Miller struct hlist_node byspi; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds atomic_t refcnt; 1301da177e4SLinus Torvalds spinlock_t lock; 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds struct xfrm_id id; 1331da177e4SLinus Torvalds struct xfrm_selector sel; 1341da177e4SLinus Torvalds 1359d4a706dSDavid S. Miller u32 genid; 1369d4a706dSDavid S. Miller 1371da177e4SLinus Torvalds /* Key manger bits */ 1381da177e4SLinus Torvalds struct { 1391da177e4SLinus Torvalds u8 state; 1401da177e4SLinus Torvalds u8 dying; 1411da177e4SLinus Torvalds u32 seq; 1421da177e4SLinus Torvalds } km; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds /* Parameters of this state. */ 1451da177e4SLinus Torvalds struct { 1461da177e4SLinus Torvalds u32 reqid; 1471da177e4SLinus Torvalds u8 mode; 1481da177e4SLinus Torvalds u8 replay_window; 1491da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1501da177e4SLinus Torvalds u8 flags; 1511da177e4SLinus Torvalds u16 family; 1521da177e4SLinus Torvalds xfrm_address_t saddr; 1531da177e4SLinus Torvalds int header_len; 1541da177e4SLinus Torvalds int trailer_len; 1551da177e4SLinus Torvalds } props; 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* Data for transformer */ 1601da177e4SLinus Torvalds struct xfrm_algo *aalg; 1611da177e4SLinus Torvalds struct xfrm_algo *ealg; 1621da177e4SLinus Torvalds struct xfrm_algo *calg; 1631a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds /* Data for encapsulator */ 1661da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1671da177e4SLinus Torvalds 168060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 169060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 170060f02a3SNoriaki TAKAMIYA 1711da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1721da177e4SLinus Torvalds struct xfrm_state *tunnel; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1751da177e4SLinus Torvalds atomic_t tunnel_users; 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds /* State for replay detection */ 1781da177e4SLinus Torvalds struct xfrm_replay_state replay; 1791da177e4SLinus Torvalds 180f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 181f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 182f8cd5488SJamal Hadi Salim 1832717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1842717096aSJamal Hadi Salim * moment 1852717096aSJamal Hadi Salim */ 1862717096aSJamal Hadi Salim u32 xflags; 1872717096aSJamal Hadi Salim 188f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 189f8cd5488SJamal Hadi Salim u32 replay_maxage; 190f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 191f8cd5488SJamal Hadi Salim 192f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 193f8cd5488SJamal Hadi Salim struct timer_list rtimer; 194f8cd5488SJamal Hadi Salim 1951da177e4SLinus Torvalds /* Statistics */ 1961da177e4SLinus Torvalds struct xfrm_stats stats; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1991da177e4SLinus Torvalds struct timer_list timer; 2001da177e4SLinus Torvalds 2019afaca05SMasahide NAKAMURA /* Last used time */ 202d26f3984SHerbert Xu unsigned long lastused; 2039afaca05SMasahide NAKAMURA 2041da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2051da177e4SLinus Torvalds * transformer. */ 206533cb5b0SEric Dumazet const struct xfrm_type *type; 20713996378SHerbert Xu struct xfrm_mode *inner_mode; 20813996378SHerbert Xu struct xfrm_mode *outer_mode; 2091da177e4SLinus Torvalds 210df71837dSTrent Jaeger /* Security context */ 211df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 212df71837dSTrent Jaeger 2131da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2141da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2151da177e4SLinus Torvalds void *data; 2161da177e4SLinus Torvalds }; 2171da177e4SLinus Torvalds 2182717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2192717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2202717096aSJamal Hadi Salim 2211da177e4SLinus Torvalds enum { 2221da177e4SLinus Torvalds XFRM_STATE_VOID, 2231da177e4SLinus Torvalds XFRM_STATE_ACQ, 2241da177e4SLinus Torvalds XFRM_STATE_VALID, 2251da177e4SLinus Torvalds XFRM_STATE_ERROR, 2261da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2271da177e4SLinus Torvalds XFRM_STATE_DEAD 2281da177e4SLinus Torvalds }; 2291da177e4SLinus Torvalds 23026b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 23126b15dadSJamal Hadi Salim struct km_event 23226b15dadSJamal Hadi Salim { 233bf08867fSHerbert Xu union { 234bf08867fSHerbert Xu u32 hard; 235bf08867fSHerbert Xu u32 proto; 236bf08867fSHerbert Xu u32 byid; 237f8cd5488SJamal Hadi Salim u32 aevent; 238f7b6983fSMasahide NAKAMURA u32 type; 239bf08867fSHerbert Xu } data; 240bf08867fSHerbert Xu 24126b15dadSJamal Hadi Salim u32 seq; 24226b15dadSJamal Hadi Salim u32 pid; 24326b15dadSJamal Hadi Salim u32 event; 24426b15dadSJamal Hadi Salim }; 24526b15dadSJamal Hadi Salim 24625ee3286SHerbert Xu struct net_device; 2471da177e4SLinus Torvalds struct xfrm_type; 2481da177e4SLinus Torvalds struct xfrm_dst; 2491da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2501da177e4SLinus Torvalds unsigned short family; 2511da177e4SLinus Torvalds struct dst_ops *dst_ops; 2521da177e4SLinus Torvalds void (*garbage_collect)(void); 25366cdb3caSHerbert Xu struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, 25466cdb3caSHerbert Xu xfrm_address_t *daddr); 255a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2561da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2571da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 258d5422efeSHerbert Xu struct flowi *fl, 259d5422efeSHerbert Xu int reverse); 26025ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 261a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 262a1b05140SMasahide NAKAMURA struct dst_entry *dst, 263a1b05140SMasahide NAKAMURA int nfheader_len); 26425ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 26525ee3286SHerbert Xu struct net_device *dev); 2661da177e4SLinus Torvalds }; 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2691da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 27026b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 27126b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds struct xfrm_tmpl; 274980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 27553bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 27653bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 27753bc6b4dSJamal Hadi Salim 2781da177e4SLinus Torvalds struct xfrm_state_afinfo { 27917c2a42aSHerbert Xu unsigned int family; 28036cf9acfSHerbert Xu unsigned int proto; 2818e3d716cSAl Viro __be16 eth_proto; 28217c2a42aSHerbert Xu struct module *owner; 283533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 284aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 285d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2861da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2871da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2881da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 28941a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 29041a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 291cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 292227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 293227620e2SHerbert Xu struct sk_buff *skb); 29436cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 29536cf9acfSHerbert Xu struct sk_buff *skb); 296716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 297716062fdSHerbert Xu int async); 2981da177e4SLinus Torvalds }; 2991da177e4SLinus Torvalds 3001da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3011da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds struct xfrm_type 3061da177e4SLinus Torvalds { 3071da177e4SLinus Torvalds char *description; 3081da177e4SLinus Torvalds struct module *owner; 3091da177e4SLinus Torvalds __u8 proto; 3101b5c2299SMasahide NAKAMURA __u8 flags; 3111b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 312436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 313f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 314f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3151da177e4SLinus Torvalds 31672cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3171da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 318e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3191da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 320df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 321aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3221da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 323c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3241da177e4SLinus Torvalds }; 3251da177e4SLinus Torvalds 326533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 327533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3281da177e4SLinus Torvalds 329b59f45d0SHerbert Xu struct xfrm_mode { 330227620e2SHerbert Xu /* 331227620e2SHerbert Xu * Remove encapsulation header. 332227620e2SHerbert Xu * 333227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 334227620e2SHerbert Xu * header. 335227620e2SHerbert Xu * 336227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 337227620e2SHerbert Xu * should be and the network header shall be set to where the IP 338227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 339227620e2SHerbert Xu * payload. 340227620e2SHerbert Xu */ 341227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 342227620e2SHerbert Xu 343227620e2SHerbert Xu /* 344227620e2SHerbert Xu * This is the actual input entry point. 345227620e2SHerbert Xu * 346227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 347227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 348227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 349227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 350227620e2SHerbert Xu */ 351b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 35237fedd3aSHerbert Xu 35337fedd3aSHerbert Xu /* 35437fedd3aSHerbert Xu * Add encapsulation header. 35537fedd3aSHerbert Xu * 35637fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 35737fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 35837fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 35937fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 36037fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 36137fedd3aSHerbert Xu * header. The value of the network header will always point 36237fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 36337fedd3aSHerbert Xu */ 36436cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 36536cf9acfSHerbert Xu 36636cf9acfSHerbert Xu /* 36736cf9acfSHerbert Xu * This is the actual output entry point. 36836cf9acfSHerbert Xu * 36936cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 37036cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 37136cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 37236cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 37336cf9acfSHerbert Xu * call output2. 37436cf9acfSHerbert Xu */ 375eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 376b59f45d0SHerbert Xu 37717c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 378b59f45d0SHerbert Xu struct module *owner; 379b59f45d0SHerbert Xu unsigned int encap; 3801bfcb10fSHerbert Xu int flags; 3811bfcb10fSHerbert Xu }; 3821bfcb10fSHerbert Xu 3831bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3841bfcb10fSHerbert Xu enum { 3851bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 386b59f45d0SHerbert Xu }; 387b59f45d0SHerbert Xu 388b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 389b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 390b59f45d0SHerbert Xu 3911da177e4SLinus Torvalds struct xfrm_tmpl 3921da177e4SLinus Torvalds { 3931da177e4SLinus Torvalds /* id in template is interpreted as: 3941da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3951da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3961da177e4SLinus Torvalds * daddr must be fixed too. 3971da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3981da177e4SLinus Torvalds */ 3991da177e4SLinus Torvalds struct xfrm_id id; 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4021da177e4SLinus Torvalds xfrm_address_t saddr; 4031da177e4SLinus Torvalds 40476b3f055SMiika Komu unsigned short encap_family; 40576b3f055SMiika Komu 4061da177e4SLinus Torvalds __u32 reqid; 4071da177e4SLinus Torvalds 4087e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 4091da177e4SLinus Torvalds __u8 mode; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 4121da177e4SLinus Torvalds __u8 share; 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 4151da177e4SLinus Torvalds __u8 optional; 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 4181da177e4SLinus Torvalds __u32 aalgos; 4191da177e4SLinus Torvalds __u32 ealgos; 4201da177e4SLinus Torvalds __u32 calgos; 4211da177e4SLinus Torvalds }; 4221da177e4SLinus Torvalds 423622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds struct xfrm_policy 4261da177e4SLinus Torvalds { 4271da177e4SLinus Torvalds struct xfrm_policy *next; 4284c563f76STimo Teras struct list_head bytype; 4292518c7c2SDavid S. Miller struct hlist_node bydst; 4302518c7c2SDavid S. Miller struct hlist_node byidx; 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4331da177e4SLinus Torvalds rwlock_t lock; 4341da177e4SLinus Torvalds atomic_t refcnt; 4351da177e4SLinus Torvalds struct timer_list timer; 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds u32 priority; 4381da177e4SLinus Torvalds u32 index; 4391da177e4SLinus Torvalds struct xfrm_selector selector; 4401da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4411da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 4421da177e4SLinus Torvalds struct dst_entry *bundles; 44346ca5f5dSArnaldo Carvalho de Melo u16 family; 44446ca5f5dSArnaldo Carvalho de Melo u8 type; 44546ca5f5dSArnaldo Carvalho de Melo u8 action; 44646ca5f5dSArnaldo Carvalho de Melo u8 flags; 44746ca5f5dSArnaldo Carvalho de Melo u8 dead; 44846ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 44946ca5f5dSArnaldo Carvalho de Melo /* XXX 1 byte hole, try to pack */ 450df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 4511da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 4521da177e4SLinus Torvalds }; 4531da177e4SLinus Torvalds 45480c9abaaSShinta Sugimoto struct xfrm_migrate { 45580c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 45680c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 45780c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 45880c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 45980c9abaaSShinta Sugimoto u8 proto; 46080c9abaaSShinta Sugimoto u8 mode; 46180c9abaaSShinta Sugimoto u16 reserved; 46280c9abaaSShinta Sugimoto u32 reqid; 46380c9abaaSShinta Sugimoto u16 old_family; 46480c9abaaSShinta Sugimoto u16 new_family; 46580c9abaaSShinta Sugimoto }; 46680c9abaaSShinta Sugimoto 4671da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 468f8cd5488SJamal Hadi Salim /* which seqno */ 469f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 470f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 471f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 472f8cd5488SJamal Hadi Salim /* what happened */ 473f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 474f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 475f8cd5488SJamal Hadi Salim 476f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 477f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 478f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 479f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 480f8cd5488SJamal Hadi Salim /* default seq threshold size */ 481f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds struct xfrm_mgr 4841da177e4SLinus Torvalds { 4851da177e4SLinus Torvalds struct list_head list; 4861da177e4SLinus Torvalds char *id; 48726b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 4881da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 489cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 4905d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 49126b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 49297a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 49380c9abaaSShinta Sugimoto int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); 4941da177e4SLinus Torvalds }; 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 4971da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 4981da177e4SLinus Torvalds 4992518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 5001da177e4SLinus Torvalds 501436a0a40SHerbert Xu /* 502436a0a40SHerbert Xu * This structure is used for the duration where packets are being 503436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 504436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 505436a0a40SHerbert Xu */ 506436a0a40SHerbert Xu struct xfrm_skb_cb { 507436a0a40SHerbert Xu union { 508436a0a40SHerbert Xu struct inet_skb_parm h4; 509436a0a40SHerbert Xu struct inet6_skb_parm h6; 510436a0a40SHerbert Xu } header; 511436a0a40SHerbert Xu 512436a0a40SHerbert Xu /* Sequence number for replay protection. */ 513b318e0e4SHerbert Xu union { 514b318e0e4SHerbert Xu u64 output; 515b318e0e4SHerbert Xu __be32 input; 516b318e0e4SHerbert Xu } seq; 517436a0a40SHerbert Xu }; 518436a0a40SHerbert Xu 519436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 520436a0a40SHerbert Xu 52136cf9acfSHerbert Xu /* 52236cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 52336cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 52436cf9acfSHerbert Xu */ 52536cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 52636cf9acfSHerbert Xu union { 52736cf9acfSHerbert Xu struct inet_skb_parm h4; 52836cf9acfSHerbert Xu struct inet6_skb_parm h6; 52936cf9acfSHerbert Xu } header; 53036cf9acfSHerbert Xu 53136cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 53236cf9acfSHerbert Xu __be16 id; 53336cf9acfSHerbert Xu __be16 frag_off; 53436cf9acfSHerbert Xu 53536cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 53636cf9acfSHerbert Xu u8 tos; 53736cf9acfSHerbert Xu 53836cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 53936cf9acfSHerbert Xu u8 ttl; 54036cf9acfSHerbert Xu 54136cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 54236cf9acfSHerbert Xu u8 protocol; 54336cf9acfSHerbert Xu 54436cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 54536cf9acfSHerbert Xu u8 flow_lbl[3]; 54636cf9acfSHerbert Xu }; 54736cf9acfSHerbert Xu 54836cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 54936cf9acfSHerbert Xu 550716062fdSHerbert Xu /* 551716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 552716062fdSHerbert Xu * related information. 553716062fdSHerbert Xu */ 554716062fdSHerbert Xu struct xfrm_spi_skb_cb { 555716062fdSHerbert Xu union { 556716062fdSHerbert Xu struct inet_skb_parm h4; 557716062fdSHerbert Xu struct inet6_skb_parm h6; 558716062fdSHerbert Xu } header; 559716062fdSHerbert Xu 560716062fdSHerbert Xu unsigned int daddroff; 5612fcb45b6SHerbert Xu unsigned int family; 562716062fdSHerbert Xu }; 563716062fdSHerbert Xu 564716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 565716062fdSHerbert Xu 566161a09e7SJoy Latten /* Audit Information */ 567161a09e7SJoy Latten struct xfrm_audit 568161a09e7SJoy Latten { 569ab5f5e8bSJoy Latten u32 loginuid; 570161a09e7SJoy Latten u32 secid; 571161a09e7SJoy Latten }; 572c9204d9cSJoy Latten 573c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 574afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 575ab5f5e8bSJoy Latten { 576ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 577ab5f5e8bSJoy Latten 578afeb14b4SPaul Moore if (audit_enabled == 0) 579afeb14b4SPaul Moore return NULL; 580ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 581ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 582ab5f5e8bSJoy Latten if (audit_buf == NULL) 583ab5f5e8bSJoy Latten return NULL; 584afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 585afeb14b4SPaul Moore return audit_buf; 586afeb14b4SPaul Moore } 587afeb14b4SPaul Moore 588afeb14b4SPaul Moore static inline void xfrm_audit_helper_usrinfo(u32 auid, u32 secid, 589afeb14b4SPaul Moore struct audit_buffer *audit_buf) 590afeb14b4SPaul Moore { 591afeb14b4SPaul Moore char *secctx; 592afeb14b4SPaul Moore u32 secctx_len; 593ab5f5e8bSJoy Latten 594ab5f5e8bSJoy Latten audit_log_format(audit_buf, " auid=%u", auid); 59568277accSPaul Moore if (secid != 0 && 59668277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 597ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 598ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 599ab5f5e8bSJoy Latten } else 600ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 601ab5f5e8bSJoy Latten } 602ab5f5e8bSJoy Latten 603ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 60468277accSPaul Moore u32 auid, u32 secid); 605ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 60668277accSPaul Moore u32 auid, u32 secid); 607ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 60868277accSPaul Moore u32 auid, u32 secid); 609ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 61068277accSPaul Moore u32 auid, u32 secid); 611afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 612afeb14b4SPaul Moore struct sk_buff *skb); 613afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 614afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 615afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 616afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 617afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 618c9204d9cSJoy Latten #else 619ab5f5e8bSJoy Latten #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) 620ab5f5e8bSJoy Latten #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) 621ab5f5e8bSJoy Latten #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) 622ab5f5e8bSJoy Latten #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) 623afeb14b4SPaul Moore #define xfrm_audit_state_replay_overflow(x, s) do { ; } while (0) 624afeb14b4SPaul Moore #define xfrm_audit_state_notfound_simple(s, f) do { ; } while (0) 625afeb14b4SPaul Moore #define xfrm_audit_state_notfound(s, f, sp, sq) do { ; } while (0) 626afeb14b4SPaul Moore #define xfrm_audit_state_icvfail(x, s, p) do { ; } while (0) 627c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 628161a09e7SJoy Latten 6291da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 6301da177e4SLinus Torvalds { 6311da177e4SLinus Torvalds if (likely(policy != NULL)) 6321da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 63564c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 6381da177e4SLinus Torvalds { 6391da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 64064c31b3fSWANG Cong xfrm_policy_destroy(policy); 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds 6434e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 6444e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6454e81bb83SMasahide NAKAMURA { 6464e81bb83SMasahide NAKAMURA int i; 6474e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 6484e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 6494e81bb83SMasahide NAKAMURA } 6504e81bb83SMasahide NAKAMURA #else 6514e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6524e81bb83SMasahide NAKAMURA { 6534e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 6544e81bb83SMasahide NAKAMURA } 6554e81bb83SMasahide NAKAMURA #endif 6564e81bb83SMasahide NAKAMURA 6571da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 6581da177e4SLinus Torvalds 65921380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 66021380b81SHerbert Xu { 66121380b81SHerbert Xu atomic_dec(&x->refcnt); 66221380b81SHerbert Xu } 66321380b81SHerbert Xu 6641da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 6651da177e4SLinus Torvalds { 6661da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 6671da177e4SLinus Torvalds __xfrm_state_destroy(x); 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 6711da177e4SLinus Torvalds { 6721da177e4SLinus Torvalds atomic_inc(&x->refcnt); 6731da177e4SLinus Torvalds } 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 6761da177e4SLinus Torvalds { 6775f19343fSAl Viro __be32 *a1 = token1; 6785f19343fSAl Viro __be32 *a2 = token2; 6791da177e4SLinus Torvalds int pdw; 6801da177e4SLinus Torvalds int pbi; 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 6831da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds if (pdw) 6861da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 6871da177e4SLinus Torvalds return 0; 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds if (pbi) { 6905f19343fSAl Viro __be32 mask; 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 6951da177e4SLinus Torvalds return 0; 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds return 1; 6991da177e4SLinus Torvalds } 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds static __inline__ 702f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 7031da177e4SLinus Torvalds { 704f9d07e41SAl Viro __be16 port; 7051da177e4SLinus Torvalds switch(fl->proto) { 7061da177e4SLinus Torvalds case IPPROTO_TCP: 7071da177e4SLinus Torvalds case IPPROTO_UDP: 708ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 7091da177e4SLinus Torvalds case IPPROTO_SCTP: 7101da177e4SLinus Torvalds port = fl->fl_ip_sport; 7111da177e4SLinus Torvalds break; 7121da177e4SLinus Torvalds case IPPROTO_ICMP: 7131da177e4SLinus Torvalds case IPPROTO_ICMPV6: 7141da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 7151da177e4SLinus Torvalds break; 7162ce4272aSMasahide NAKAMURA case IPPROTO_MH: 7172ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 7182ce4272aSMasahide NAKAMURA break; 7191da177e4SLinus Torvalds default: 7201da177e4SLinus Torvalds port = 0; /*XXX*/ 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds return port; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds static __inline__ 726f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 7271da177e4SLinus Torvalds { 728f9d07e41SAl Viro __be16 port; 7291da177e4SLinus Torvalds switch(fl->proto) { 7301da177e4SLinus Torvalds case IPPROTO_TCP: 7311da177e4SLinus Torvalds case IPPROTO_UDP: 732ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 7331da177e4SLinus Torvalds case IPPROTO_SCTP: 7341da177e4SLinus Torvalds port = fl->fl_ip_dport; 7351da177e4SLinus Torvalds break; 7361da177e4SLinus Torvalds case IPPROTO_ICMP: 7371da177e4SLinus Torvalds case IPPROTO_ICMPV6: 7381da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 7391da177e4SLinus Torvalds break; 7401da177e4SLinus Torvalds default: 7411da177e4SLinus Torvalds port = 0; /*XXX*/ 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds return port; 7441da177e4SLinus Torvalds } 7451da177e4SLinus Torvalds 74677681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 74777681021SAndrew Morton unsigned short family); 7481da177e4SLinus Torvalds 749df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 750df71837dSTrent Jaeger /* If neither has a context --> match 751df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 752df71837dSTrent Jaeger */ 753df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 754df71837dSTrent Jaeger { 755df71837dSTrent Jaeger return ((!s1 && !s2) || 756df71837dSTrent Jaeger (s1 && s2 && 757df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 758df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 759df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 760df71837dSTrent Jaeger } 761df71837dSTrent Jaeger #else 762df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 763df71837dSTrent Jaeger { 764df71837dSTrent Jaeger return 1; 765df71837dSTrent Jaeger } 766df71837dSTrent Jaeger #endif 767df71837dSTrent Jaeger 7681da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 7691da177e4SLinus Torvalds * 7701da177e4SLinus Torvalds * dst->child points to the next element of bundle. 7711da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 7721da177e4SLinus Torvalds * 7731da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 7741da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 7751da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 7761da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 7771da177e4SLinus Torvalds * policy rule. 7781da177e4SLinus Torvalds */ 7791da177e4SLinus Torvalds struct xfrm_dst 7801da177e4SLinus Torvalds { 7811da177e4SLinus Torvalds union { 7821da177e4SLinus Torvalds struct dst_entry dst; 7831da177e4SLinus Torvalds struct rtable rt; 7841da177e4SLinus Torvalds struct rt6_info rt6; 7851da177e4SLinus Torvalds } u; 7861da177e4SLinus Torvalds struct dst_entry *route; 787157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 788157bfc25SMasahide NAKAMURA struct flowi *origin; 789157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 790157bfc25SMasahide NAKAMURA #endif 7919d4a706dSDavid S. Miller u32 genid; 7921da177e4SLinus Torvalds u32 route_mtu_cached; 7931da177e4SLinus Torvalds u32 child_mtu_cached; 79492d63decSHideaki YOSHIFUJI u32 route_cookie; 79592d63decSHideaki YOSHIFUJI u32 path_cookie; 7961da177e4SLinus Torvalds }; 7971da177e4SLinus Torvalds 798aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 799aabc9761SHerbert Xu { 800aabc9761SHerbert Xu dst_release(xdst->route); 801aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 802aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 803157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 804157bfc25SMasahide NAKAMURA kfree(xdst->origin); 805157bfc25SMasahide NAKAMURA xdst->origin = NULL; 806157bfc25SMasahide NAKAMURA kfree(xdst->partner); 807157bfc25SMasahide NAKAMURA xdst->partner = NULL; 808157bfc25SMasahide NAKAMURA #endif 809aabc9761SHerbert Xu } 810aabc9761SHerbert Xu 811aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 812aabc9761SHerbert Xu 8131da177e4SLinus Torvalds struct sec_path 8141da177e4SLinus Torvalds { 8151da177e4SLinus Torvalds atomic_t refcnt; 8161da177e4SLinus Torvalds int len; 817dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 8181da177e4SLinus Torvalds }; 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds static inline struct sec_path * 8211da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 8221da177e4SLinus Torvalds { 8231da177e4SLinus Torvalds if (sp) 8241da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 8251da177e4SLinus Torvalds return sp; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds static inline void 8311da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 8321da177e4SLinus Torvalds { 8331da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 8341da177e4SLinus Torvalds __secpath_destroy(sp); 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds static inline void 8401da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 8411da177e4SLinus Torvalds { 8421da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8431da177e4SLinus Torvalds secpath_put(skb->sp); 8441da177e4SLinus Torvalds skb->sp = NULL; 8451da177e4SLinus Torvalds #endif 8461da177e4SLinus Torvalds } 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds static inline int 849a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 850a1e59abfSPatrick McHardy { 851a1e59abfSPatrick McHardy switch (family) { 852a1e59abfSPatrick McHardy case AF_INET: 853a1e59abfSPatrick McHardy return addr->a4 == 0; 854a1e59abfSPatrick McHardy case AF_INET6: 855a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 856a1e59abfSPatrick McHardy } 857a1e59abfSPatrick McHardy return 0; 858a1e59abfSPatrick McHardy } 859a1e59abfSPatrick McHardy 860a1e59abfSPatrick McHardy static inline int 8611da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8621da177e4SLinus Torvalds { 8631da177e4SLinus Torvalds return (tmpl->saddr.a4 && 8641da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds static inline int 8681da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8691da177e4SLinus Torvalds { 8701da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 8711da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds static inline int 8751da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 8761da177e4SLinus Torvalds { 8771da177e4SLinus Torvalds switch (family) { 8781da177e4SLinus Torvalds case AF_INET: 8791da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 8801da177e4SLinus Torvalds case AF_INET6: 8811da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds return !0; 8841da177e4SLinus Torvalds } 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8871da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 8881da177e4SLinus Torvalds 889d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 890d5422efeSHerbert Xu struct sk_buff *skb, 891d5422efeSHerbert Xu unsigned int family, int reverse) 8921da177e4SLinus Torvalds { 893d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 894d5422efeSHerbert Xu 8951da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 896d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 8971da177e4SLinus Torvalds 8982518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 8991da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 900d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 901d5422efeSHerbert Xu } 902d5422efeSHerbert Xu 903d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 904d5422efeSHerbert Xu { 905d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 9061da177e4SLinus Torvalds } 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9091da177e4SLinus Torvalds { 9101da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9141da177e4SLinus Torvalds { 9151da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 9161da177e4SLinus Torvalds } 9171da177e4SLinus Torvalds 918d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 919d5422efeSHerbert Xu struct sk_buff *skb) 920d5422efeSHerbert Xu { 921d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 922d5422efeSHerbert Xu } 923d5422efeSHerbert Xu 924d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 925d5422efeSHerbert Xu struct sk_buff *skb) 926d5422efeSHerbert Xu { 927d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 928d5422efeSHerbert Xu } 929d5422efeSHerbert Xu 930d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 931d5422efeSHerbert Xu unsigned int family, int reverse); 932d5422efeSHerbert Xu 933d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 934d5422efeSHerbert Xu unsigned int family) 935d5422efeSHerbert Xu { 936d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 937d5422efeSHerbert Xu } 938d5422efeSHerbert Xu 939d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 940d5422efeSHerbert Xu struct flowi *fl, 941d5422efeSHerbert Xu unsigned int family) 942d5422efeSHerbert Xu { 943d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 944d5422efeSHerbert Xu } 945d5422efeSHerbert Xu 9461da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 9491da177e4SLinus Torvalds { 9502518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 9511da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 9521da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 9561da177e4SLinus Torvalds { 9571da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 9611da177e4SLinus Torvalds { 9621da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 9631da177e4SLinus Torvalds } 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 9701da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 9711da177e4SLinus Torvalds return 0; 9721da177e4SLinus Torvalds } 9731da177e4SLinus Torvalds 9744666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 9771da177e4SLinus Torvalds { 9781da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 9791da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 9801da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 9811da177e4SLinus Torvalds } 9821da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 9831da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 9841da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds #else 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 9911da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 9921da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 9931da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 9941da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9951da177e4SLinus Torvalds { 9961da177e4SLinus Torvalds return 1; 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9991da177e4SLinus Torvalds { 10001da177e4SLinus Torvalds return 1; 10011da177e4SLinus Torvalds } 10021da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 10031da177e4SLinus Torvalds { 10041da177e4SLinus Torvalds return 1; 10051da177e4SLinus Torvalds } 1006d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1007d5422efeSHerbert Xu struct flowi *fl, 1008d5422efeSHerbert Xu unsigned int family) 1009d5422efeSHerbert Xu { 1010d5422efeSHerbert Xu return -ENOSYS; 1011d5422efeSHerbert Xu } 1012d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1013d5422efeSHerbert Xu struct sk_buff *skb) 1014d5422efeSHerbert Xu { 1015d5422efeSHerbert Xu return 1; 1016d5422efeSHerbert Xu } 1017d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1018d5422efeSHerbert Xu struct sk_buff *skb) 1019d5422efeSHerbert Xu { 1020d5422efeSHerbert Xu return 1; 1021d5422efeSHerbert Xu } 10221da177e4SLinus Torvalds #endif 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds static __inline__ 10251da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 10261da177e4SLinus Torvalds { 10271da177e4SLinus Torvalds switch (family){ 10281da177e4SLinus Torvalds case AF_INET: 10291da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 10301da177e4SLinus Torvalds case AF_INET6: 10311da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 10321da177e4SLinus Torvalds } 10331da177e4SLinus Torvalds return NULL; 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds static __inline__ 10371da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 10381da177e4SLinus Torvalds { 10391da177e4SLinus Torvalds switch (family){ 10401da177e4SLinus Torvalds case AF_INET: 10411da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 10421da177e4SLinus Torvalds case AF_INET6: 10431da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds return NULL; 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 10489bb182a7SYOSHIFUJI Hideaki static __inline__ 10499bb182a7SYOSHIFUJI Hideaki void xfrm_flowi_addr_get(struct flowi *fl, 10509bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 10519bb182a7SYOSHIFUJI Hideaki unsigned short family) 10529bb182a7SYOSHIFUJI Hideaki { 10539bb182a7SYOSHIFUJI Hideaki switch(family) { 10549bb182a7SYOSHIFUJI Hideaki case AF_INET: 10559bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 10569bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 10579bb182a7SYOSHIFUJI Hideaki break; 10589bb182a7SYOSHIFUJI Hideaki case AF_INET6: 10599bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 10609bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 10619bb182a7SYOSHIFUJI Hideaki break; 10629bb182a7SYOSHIFUJI Hideaki } 10639bb182a7SYOSHIFUJI Hideaki } 10649bb182a7SYOSHIFUJI Hideaki 10651da177e4SLinus Torvalds static __inline__ int 10661da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 10671da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 10681da177e4SLinus Torvalds { 10691da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 10701da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 10711da177e4SLinus Torvalds return 1; 10721da177e4SLinus Torvalds return 0; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds static __inline__ int 10761da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 10771da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 10781da177e4SLinus Torvalds { 10791da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 10801da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 10811da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 10821da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 10831da177e4SLinus Torvalds return 1; 10841da177e4SLinus Torvalds return 0; 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds static __inline__ int 10881da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 10891da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 10901da177e4SLinus Torvalds unsigned short family) 10911da177e4SLinus Torvalds { 10921da177e4SLinus Torvalds switch (family) { 10931da177e4SLinus Torvalds case AF_INET: 10941da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 10951da177e4SLinus Torvalds case AF_INET6: 10961da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds return 0; 10991da177e4SLinus Torvalds } 11001da177e4SLinus Torvalds 1101e53820deSMasahide NAKAMURA static __inline__ int 1102e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1103e53820deSMasahide NAKAMURA unsigned short family) 1104e53820deSMasahide NAKAMURA { 1105e53820deSMasahide NAKAMURA switch (family) { 1106e53820deSMasahide NAKAMURA case AF_INET: 1107e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1108e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1109e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1110e53820deSMasahide NAKAMURA case AF_INET6: 1111e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1112e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1113e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1114e53820deSMasahide NAKAMURA } 1115e53820deSMasahide NAKAMURA return 0; 1116e53820deSMasahide NAKAMURA } 1117e53820deSMasahide NAKAMURA 11181da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 11191da177e4SLinus Torvalds { 11201da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds 11235794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 11245794708fSMasahide NAKAMURA { 1125dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1126dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1127dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1128dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 11295794708fSMasahide NAKAMURA } 11305794708fSMasahide NAKAMURA 11311da177e4SLinus Torvalds /* 11321da177e4SLinus Torvalds * xfrm algorithm information 11331da177e4SLinus Torvalds */ 11341a6509d9SHerbert Xu struct xfrm_algo_aead_info { 11351a6509d9SHerbert Xu u16 icv_truncbits; 11361a6509d9SHerbert Xu }; 11371a6509d9SHerbert Xu 11381da177e4SLinus Torvalds struct xfrm_algo_auth_info { 11391da177e4SLinus Torvalds u16 icv_truncbits; 11401da177e4SLinus Torvalds u16 icv_fullbits; 11411da177e4SLinus Torvalds }; 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds struct xfrm_algo_encr_info { 11441da177e4SLinus Torvalds u16 blockbits; 11451da177e4SLinus Torvalds u16 defkeybits; 11461da177e4SLinus Torvalds }; 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds struct xfrm_algo_comp_info { 11491da177e4SLinus Torvalds u16 threshold; 11501da177e4SLinus Torvalds }; 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds struct xfrm_algo_desc { 11531da177e4SLinus Torvalds char *name; 115404ff1260SHerbert Xu char *compat; 11551da177e4SLinus Torvalds u8 available:1; 11561da177e4SLinus Torvalds union { 11571a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 11581da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 11591da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 11601da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 11611da177e4SLinus Torvalds } uinfo; 11621da177e4SLinus Torvalds struct sadb_alg desc; 11631da177e4SLinus Torvalds }; 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 11661da177e4SLinus Torvalds struct xfrm_tunnel { 11671da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1168d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1169d2acc347SHerbert Xu 1170d2acc347SHerbert Xu struct xfrm_tunnel *next; 1171d2acc347SHerbert Xu int priority; 11721da177e4SLinus Torvalds }; 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds struct xfrm6_tunnel { 1175d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1176d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 117704ce6909SAl Viro int type, int code, int offset, __be32 info); 1178d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1179d2acc347SHerbert Xu int priority; 11801da177e4SLinus Torvalds }; 11811da177e4SLinus Torvalds 11824c563f76STimo Teras struct xfrm_state_walk { 11834c563f76STimo Teras struct xfrm_state *state; 11844c563f76STimo Teras int count; 11854c563f76STimo Teras u8 proto; 11864c563f76STimo Teras }; 11874c563f76STimo Teras 11884c563f76STimo Teras struct xfrm_policy_walk { 11894c563f76STimo Teras struct xfrm_policy *policy; 11904c563f76STimo Teras int count; 11914c563f76STimo Teras u8 type, cur_type; 11924c563f76STimo Teras }; 11934c563f76STimo Teras 11941da177e4SLinus Torvalds extern void xfrm_init(void); 11951da177e4SLinus Torvalds extern void xfrm4_init(void); 11961da177e4SLinus Torvalds extern void xfrm_state_init(void); 11971da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1198c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1199c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1200c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12010013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12021da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1203c35b7e72SDaniel Lezcano #else 1204c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1205c35b7e72SDaniel Lezcano { 1206c35b7e72SDaniel Lezcano return 0; 1207c35b7e72SDaniel Lezcano } 1208c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1209c35b7e72SDaniel Lezcano { 1210c35b7e72SDaniel Lezcano ; 1211c35b7e72SDaniel Lezcano } 1212c35b7e72SDaniel Lezcano #endif 12131da177e4SLinus Torvalds 1214558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1215558f82efSMasahide NAKAMURA extern int xfrm_proc_init(void); 1216558f82efSMasahide NAKAMURA #endif 1217558f82efSMasahide NAKAMURA 12184c563f76STimo Teras static inline void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) 12194c563f76STimo Teras { 12204c563f76STimo Teras walk->proto = proto; 12214c563f76STimo Teras walk->state = NULL; 12224c563f76STimo Teras walk->count = 0; 12234c563f76STimo Teras } 12244c563f76STimo Teras 12254c563f76STimo Teras static inline void xfrm_state_walk_done(struct xfrm_state_walk *walk) 12264c563f76STimo Teras { 12274c563f76STimo Teras if (walk->state != NULL) { 12284c563f76STimo Teras xfrm_state_put(walk->state); 12294c563f76STimo Teras walk->state = NULL; 12304c563f76STimo Teras } 12314c563f76STimo Teras } 12324c563f76STimo Teras 12334c563f76STimo Teras extern int xfrm_state_walk(struct xfrm_state_walk *walk, 12344c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 12351da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 12361da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 12371da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 12381da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 12391da177e4SLinus Torvalds unsigned short family); 1240628529b6SJamal Hadi Salim extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, 1241628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1242628529b6SJamal Hadi Salim unsigned short family, 1243628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 12441da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 12451da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 12461da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 12471da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1248a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1249eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 125041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 125141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 125241a49cc3SMasahide NAKAMURA int n, unsigned short family); 125341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 125441a49cc3SMasahide NAKAMURA int n, unsigned short family); 125541a49cc3SMasahide NAKAMURA #else 125641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 125741a49cc3SMasahide NAKAMURA int n, unsigned short family) 125841a49cc3SMasahide NAKAMURA { 125941a49cc3SMasahide NAKAMURA return -ENOSYS; 126041a49cc3SMasahide NAKAMURA } 126141a49cc3SMasahide NAKAMURA 126241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 126341a49cc3SMasahide NAKAMURA int n, unsigned short family) 126441a49cc3SMasahide NAKAMURA { 126541a49cc3SMasahide NAKAMURA return -ENOSYS; 126641a49cc3SMasahide NAKAMURA } 126741a49cc3SMasahide NAKAMURA #endif 1268af11e316SJamal Hadi Salim 1269af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1270af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1271af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1272af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1273af11e316SJamal Hadi Salim }; 1274af11e316SJamal Hadi Salim 12755a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 12765a6d3416SJamal Hadi Salim u32 incnt; 12775a6d3416SJamal Hadi Salim u32 outcnt; 12785a6d3416SJamal Hadi Salim u32 fwdcnt; 12795a6d3416SJamal Hadi Salim u32 inscnt; 12805a6d3416SJamal Hadi Salim u32 outscnt; 12815a6d3416SJamal Hadi Salim u32 fwdscnt; 12825a6d3416SJamal Hadi Salim u32 spdhcnt; 12835a6d3416SJamal Hadi Salim u32 spdhmcnt; 12845a6d3416SJamal Hadi Salim }; 12855a6d3416SJamal Hadi Salim 12861da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 128726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 12884aa2e62cSJoy Latten extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 1289af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 12905a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1291afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1292afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 129361f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1294f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 12951da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 129672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1297227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1298716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1299716062fdSHerbert Xu int encap_type); 13001bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1301c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1302406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 130336cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1304227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1305c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1306c4541b41SHerbert Xu int encap_type); 1307716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 13081da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1309c4541b41SHerbert Xu 1310c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1311c4541b41SHerbert Xu { 1312c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1313c4541b41SHerbert Xu } 1314c4541b41SHerbert Xu 131536cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 131636cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 13171da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1318c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1319c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 132036cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1321227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 132233b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1323716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1324e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1325fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1326fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 132773d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 132873d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 13298c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 13301da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 13318c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 133236cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 133336cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 13341da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1335aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1336aee5adb4SMasahide NAKAMURA u8 **prevhdr); 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1339067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 13401da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 13411da177e4SLinus Torvalds #else 13421da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 13431da177e4SLinus Torvalds { 13441da177e4SLinus Torvalds return -ENOPROTOOPT; 13451da177e4SLinus Torvalds } 13461da177e4SLinus Torvalds 1347067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 13481da177e4SLinus Torvalds { 13491da177e4SLinus Torvalds /* should not happen */ 13501da177e4SLinus Torvalds kfree_skb(skb); 13511da177e4SLinus Torvalds return 0; 13521da177e4SLinus Torvalds } 13531da177e4SLinus Torvalds #endif 13541da177e4SLinus Torvalds 1355dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 13564c563f76STimo Teras 13574c563f76STimo Teras static inline void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type) 13584c563f76STimo Teras { 13594c563f76STimo Teras walk->cur_type = XFRM_POLICY_TYPE_MAIN; 13604c563f76STimo Teras walk->type = type; 13614c563f76STimo Teras walk->policy = NULL; 13624c563f76STimo Teras walk->count = 0; 13634c563f76STimo Teras } 13644c563f76STimo Teras 13654c563f76STimo Teras static inline void xfrm_policy_walk_done(struct xfrm_policy_walk *walk) 13664c563f76STimo Teras { 13674c563f76STimo Teras if (walk->policy != NULL) { 13684c563f76STimo Teras xfrm_pol_put(walk->policy); 13694c563f76STimo Teras walk->policy = NULL; 13704c563f76STimo Teras } 13714c563f76STimo Teras } 13724c563f76STimo Teras 13734c563f76STimo Teras extern int xfrm_policy_walk(struct xfrm_policy_walk *walk, 13744c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 13751da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 13764e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 13774e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1378ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1379ef41aaa0SEric Paris int *err); 1380ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 13814aa2e62cSJoy Latten int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 13821da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1383658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 13841da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 13851da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 13861da177e4SLinus Torvalds int create, unsigned short family); 13871da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 13885b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 13895b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 13901da177e4SLinus Torvalds 139180c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 139280c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 139380c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 139480c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 139580c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 139680c9abaaSShinta Sugimoto struct xfrm_migrate *m); 139780c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 139880c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 139980c9abaaSShinta Sugimoto #endif 140080c9abaaSShinta Sugimoto 14011da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 14025d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14036c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 140497a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14051da177e4SLinus Torvalds 14061da177e4SLinus Torvalds extern void xfrm_input_init(void); 14076067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14101da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 14111da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 14121da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 14131da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 14141da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 14151da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 14161da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 14171da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 14181da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 14191da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 14201a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 14211a6509d9SHerbert Xu int probe); 14221da177e4SLinus Torvalds 142307d4ee58SHerbert Xu struct hash_desc; 14249409f38aSHerbert Xu struct scatterlist; 142507d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 142607d4ee58SHerbert Xu unsigned int); 14271da177e4SLinus Torvalds 142807d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 14291da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 14321da177e4SLinus Torvalds int family) 14331da177e4SLinus Torvalds { 14341da177e4SLinus Torvalds switch (family) { 14351da177e4SLinus Torvalds default: 14361da177e4SLinus Torvalds case AF_INET: 14378c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 14381da177e4SLinus Torvalds case AF_INET6: 14391da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 14401da177e4SLinus Torvalds (struct in6_addr *)b); 14411da177e4SLinus Torvalds } 14421da177e4SLinus Torvalds } 14431da177e4SLinus Torvalds 144477d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 144577d8d7a6SHerbert Xu { 144677d8d7a6SHerbert Xu return index & 7; 144777d8d7a6SHerbert Xu } 144877d8d7a6SHerbert Xu 1449f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1450f8cd5488SJamal Hadi Salim { 1451be33690dSPatrick McHardy struct sock *nlsk; 1452be33690dSPatrick McHardy int ret = 0; 1453be33690dSPatrick McHardy 1454be33690dSPatrick McHardy rcu_read_lock(); 1455be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1456be33690dSPatrick McHardy if (nlsk) 1457be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1458be33690dSPatrick McHardy rcu_read_unlock(); 1459be33690dSPatrick McHardy return ret; 1460f8cd5488SJamal Hadi Salim } 1461f8cd5488SJamal Hadi Salim 14620f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 14630f99be0dSEric Dumazet { 14640f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 14650f99be0dSEric Dumazet } 14660f99be0dSEric Dumazet 146780c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 146880c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 146980c9abaaSShinta Sugimoto { 14700f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 147180c9abaaSShinta Sugimoto } 147280c9abaaSShinta Sugimoto 147380c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 147480c9abaaSShinta Sugimoto { 147580c9abaaSShinta Sugimoto int i; 147680c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 147780c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 147880c9abaaSShinta Sugimoto } 147980c9abaaSShinta Sugimoto 148080c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 148180c9abaaSShinta Sugimoto { 148280c9abaaSShinta Sugimoto int i; 148380c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 148480c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 148580c9abaaSShinta Sugimoto } 148680c9abaaSShinta Sugimoto #endif 1487f8cd5488SJamal Hadi Salim 148800501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 148900501121SHerbert Xu { 149000501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 149100501121SHerbert Xu } 149200501121SHerbert Xu 14931da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1494