diff options
Diffstat (limited to 'ANDROID_3.4.5/include/net/xfrm.h')
| -rw-r--r-- | ANDROID_3.4.5/include/net/xfrm.h | 1693 |
1 files changed, 0 insertions, 1693 deletions
diff --git a/ANDROID_3.4.5/include/net/xfrm.h b/ANDROID_3.4.5/include/net/xfrm.h deleted file mode 100644 index 96239e78..00000000 --- a/ANDROID_3.4.5/include/net/xfrm.h +++ /dev/null @@ -1,1693 +0,0 @@ -#ifndef _NET_XFRM_H -#define _NET_XFRM_H - -#include <linux/compiler.h> -#include <linux/xfrm.h> -#include <linux/spinlock.h> -#include <linux/list.h> -#include <linux/skbuff.h> -#include <linux/socket.h> -#include <linux/pfkeyv2.h> -#include <linux/ipsec.h> -#include <linux/in6.h> -#include <linux/mutex.h> -#include <linux/audit.h> -#include <linux/slab.h> - -#include <net/sock.h> -#include <net/dst.h> -#include <net/ip.h> -#include <net/route.h> -#include <net/ipv6.h> -#include <net/ip6_fib.h> -#include <net/flow.h> - -#include <linux/interrupt.h> - -#ifdef CONFIG_XFRM_STATISTICS -#include <net/snmp.h> -#endif - -#define XFRM_PROTO_ESP 50 -#define XFRM_PROTO_AH 51 -#define XFRM_PROTO_COMP 108 -#define XFRM_PROTO_IPIP 4 -#define XFRM_PROTO_IPV6 41 -#define XFRM_PROTO_ROUTING IPPROTO_ROUTING -#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS - -#define XFRM_ALIGN4(len) (((len) + 3) & ~3) -#define XFRM_ALIGN8(len) (((len) + 7) & ~7) -#define MODULE_ALIAS_XFRM_MODE(family, encap) \ - MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) -#define MODULE_ALIAS_XFRM_TYPE(family, proto) \ - MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) - -#ifdef CONFIG_XFRM_STATISTICS -#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) -#define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) -#define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) -#else -#define XFRM_INC_STATS(net, field) ((void)(net)) -#define XFRM_INC_STATS_BH(net, field) ((void)(net)) -#define XFRM_INC_STATS_USER(net, field) ((void)(net)) -#endif - -extern struct mutex xfrm_cfg_mutex; - -/* Organization of SPD aka "XFRM rules" - ------------------------------------ - - Basic objects: - - policy rule, struct xfrm_policy (=SPD entry) - - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) - - instance of a transformer, struct xfrm_state (=SA) - - template to clone xfrm_state, struct xfrm_tmpl - - SPD is plain linear list of xfrm_policy rules, ordered by priority. - (To be compatible with existing pfkeyv2 implementations, - many rules with priority of 0x7fffffff are allowed to exist and - such rules are ordered in an unpredictable way, thanks to bsd folks.) - - Lookup is plain linear search until the first match with selector. - - If "action" is "block", then we prohibit the flow, otherwise: - if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, - policy entry has list of up to XFRM_MAX_DEPTH transformations, - described by templates xfrm_tmpl. Each template is resolved - to a complete xfrm_state (see below) and we pack bundle of transformations - to a dst_entry returned to requestor. - - dst -. xfrm .-> xfrm_state #1 - |---. child .-> dst -. xfrm .-> xfrm_state #2 - |---. child .-> dst -. xfrm .-> xfrm_state #3 - |---. child .-> NULL - - Bundles are cached at xrfm_policy struct (field ->bundles). - - - Resolution of xrfm_tmpl - ----------------------- - Template contains: - 1. ->mode Mode: transport or tunnel - 2. ->id.proto Protocol: AH/ESP/IPCOMP - 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. - Q: allow to resolve security gateway? - 4. ->id.spi If not zero, static SPI. - 5. ->saddr Local tunnel endpoint, ignored for transport mode. - 6. ->algos List of allowed algos. Plain bitmask now. - Q: ealgos, aalgos, calgos. What a mess... - 7. ->share Sharing mode. - Q: how to implement private sharing mode? To add struct sock* to - flow id? - - Having this template we search through SAD searching for entries - with appropriate mode/proto/algo, permitted by selector. - If no appropriate entry found, it is requested from key manager. - - PROBLEMS: - Q: How to find all the bundles referring to a physical path for - PMTU discovery? Seems, dst should contain list of all parents... - and enter to infinite locking hierarchy disaster. - No! It is easier, we will not search for them, let them find us. - We add genid to each dst plus pointer to genid of raw IP route, - pmtu disc will update pmtu on raw IP route and increase its genid. - dst_check() will see this for top level and trigger resyncing - metrics. Plus, it will be made via sk->sk_dst_cache. Solved. - */ - -struct xfrm_state_walk { - struct list_head all; - u8 state; - union { - u8 dying; - u8 proto; - }; - u32 seq; -}; - -/* Full description of state of transformer. */ -struct xfrm_state { -#ifdef CONFIG_NET_NS - struct net *xs_net; -#endif - union { - struct hlist_node gclist; - struct hlist_node bydst; - }; - struct hlist_node bysrc; - struct hlist_node byspi; - - atomic_t refcnt; - spinlock_t lock; - - struct xfrm_id id; - struct xfrm_selector sel; - struct xfrm_mark mark; - u32 tfcpad; - - u32 genid; - - /* Key manager bits */ - struct xfrm_state_walk km; - - /* Parameters of this state. */ - struct { - u32 reqid; - u8 mode; - u8 replay_window; - u8 aalgo, ealgo, calgo; - u8 flags; - u16 family; - xfrm_address_t saddr; - int header_len; - int trailer_len; - } props; - - struct xfrm_lifetime_cfg lft; - - /* Data for transformer */ - struct xfrm_algo_auth *aalg; - struct xfrm_algo *ealg; - struct xfrm_algo *calg; - struct xfrm_algo_aead *aead; - - /* Data for encapsulator */ - struct xfrm_encap_tmpl *encap; - - /* Data for care-of address */ - xfrm_address_t *coaddr; - - /* IPComp needs an IPIP tunnel for handling uncompressed packets */ - struct xfrm_state *tunnel; - - /* If a tunnel, number of users + 1 */ - atomic_t tunnel_users; - - /* State for replay detection */ - struct xfrm_replay_state replay; - struct xfrm_replay_state_esn *replay_esn; - - /* Replay detection state at the time we sent the last notification */ - struct xfrm_replay_state preplay; - struct xfrm_replay_state_esn *preplay_esn; - - /* The functions for replay detection. */ - struct xfrm_replay *repl; - - /* internal flag that only holds state for delayed aevent at the - * moment - */ - u32 xflags; - - /* Replay detection notification settings */ - u32 replay_maxage; - u32 replay_maxdiff; - - /* Replay detection notification timer */ - struct timer_list rtimer; - - /* Statistics */ - struct xfrm_stats stats; - - struct xfrm_lifetime_cur curlft; - struct tasklet_hrtimer mtimer; - - /* Last used time */ - unsigned long lastused; - - /* Reference to data common to all the instances of this - * transformer. */ - const struct xfrm_type *type; - struct xfrm_mode *inner_mode; - struct xfrm_mode *inner_mode_iaf; - struct xfrm_mode *outer_mode; - - /* Security context */ - struct xfrm_sec_ctx *security; - - /* Private data of this transformer, format is opaque, - * interpreted by xfrm_type methods. */ - void *data; -}; - -static inline struct net *xs_net(struct xfrm_state *x) -{ - return read_pnet(&x->xs_net); -} - -/* xflags - make enum if more show up */ -#define XFRM_TIME_DEFER 1 - -enum { - XFRM_STATE_VOID, - XFRM_STATE_ACQ, - XFRM_STATE_VALID, - XFRM_STATE_ERROR, - XFRM_STATE_EXPIRED, - XFRM_STATE_DEAD -}; - -/* callback structure passed from either netlink or pfkey */ -struct km_event { - union { - u32 hard; - u32 proto; - u32 byid; - u32 aevent; - u32 type; - } data; - - u32 seq; - u32 pid; - u32 event; - struct net *net; -}; - -struct xfrm_replay { - void (*advance)(struct xfrm_state *x, __be32 net_seq); - int (*check)(struct xfrm_state *x, - struct sk_buff *skb, - __be32 net_seq); - void (*notify)(struct xfrm_state *x, int event); - int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); -}; - -struct net_device; -struct xfrm_type; -struct xfrm_dst; -struct xfrm_policy_afinfo { - unsigned short family; - struct dst_ops *dst_ops; - void (*garbage_collect)(struct net *net); - struct dst_entry *(*dst_lookup)(struct net *net, int tos, - const xfrm_address_t *saddr, - const xfrm_address_t *daddr); - int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); - void (*decode_session)(struct sk_buff *skb, - struct flowi *fl, - int reverse); - int (*get_tos)(const struct flowi *fl); - int (*init_path)(struct xfrm_dst *path, - struct dst_entry *dst, - int nfheader_len); - int (*fill_dst)(struct xfrm_dst *xdst, - struct net_device *dev, - const struct flowi *fl); - struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); -}; - -extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); -extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); -extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); -extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); - -struct xfrm_tmpl; -extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); -extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); -extern int __xfrm_state_delete(struct xfrm_state *x); - -struct xfrm_state_afinfo { - unsigned int family; - unsigned int proto; - __be16 eth_proto; - struct module *owner; - const struct xfrm_type *type_map[IPPROTO_MAX]; - struct xfrm_mode *mode_map[XFRM_MODE_MAX]; - int (*init_flags)(struct xfrm_state *x); - void (*init_tempsel)(struct xfrm_selector *sel, - const struct flowi *fl); - void (*init_temprop)(struct xfrm_state *x, - const struct xfrm_tmpl *tmpl, - const xfrm_address_t *daddr, - const xfrm_address_t *saddr); - int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); - int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); - int (*output)(struct sk_buff *skb); - int (*output_finish)(struct sk_buff *skb); - int (*extract_input)(struct xfrm_state *x, - struct sk_buff *skb); - int (*extract_output)(struct xfrm_state *x, - struct sk_buff *skb); - int (*transport_finish)(struct sk_buff *skb, - int async); -}; - -extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); -extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); - -extern void xfrm_state_delete_tunnel(struct xfrm_state *x); - -struct xfrm_type { - char *description; - struct module *owner; - u8 proto; - u8 flags; -#define XFRM_TYPE_NON_FRAGMENT 1 -#define XFRM_TYPE_REPLAY_PROT 2 -#define XFRM_TYPE_LOCAL_COADDR 4 -#define XFRM_TYPE_REMOTE_COADDR 8 - - int (*init_state)(struct xfrm_state *x); - void (*destructor)(struct xfrm_state *); - int (*input)(struct xfrm_state *, struct sk_buff *skb); - int (*output)(struct xfrm_state *, struct sk_buff *pskb); - int (*reject)(struct xfrm_state *, struct sk_buff *, - const struct flowi *); - int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); - /* Estimate maximal size of result of transformation of a dgram */ - u32 (*get_mtu)(struct xfrm_state *, int size); -}; - -extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); -extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); - -struct xfrm_mode { - /* - * Remove encapsulation header. - * - * The IP header will be moved over the top of the encapsulation - * header. - * - * On entry, the transport header shall point to where the IP header - * should be and the network header shall be set to where the IP - * header currently is. skb->data shall point to the start of the - * payload. - */ - int (*input2)(struct xfrm_state *x, struct sk_buff *skb); - - /* - * This is the actual input entry point. - * - * For transport mode and equivalent this would be identical to - * input2 (which does not need to be set). While tunnel mode - * and equivalent would set this to the tunnel encapsulation function - * xfrm4_prepare_input that would in turn call input2. - */ - int (*input)(struct xfrm_state *x, struct sk_buff *skb); - - /* - * Add encapsulation header. - * - * On exit, the transport header will be set to the start of the - * encapsulation header to be filled in by x->type->output and - * the mac header will be set to the nextheader (protocol for - * IPv4) field of the extension header directly preceding the - * encapsulation header, or in its absence, that of the top IP - * header. The value of the network header will always point - * to the top IP header while skb->data will point to the payload. - */ - int (*output2)(struct xfrm_state *x,struct sk_buff *skb); - - /* - * This is the actual output entry point. - * - * For transport mode and equivalent this would be identical to - * output2 (which does not need to be set). While tunnel mode - * and equivalent would set this to a tunnel encapsulation function - * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn - * call output2. - */ - int (*output)(struct xfrm_state *x, struct sk_buff *skb); - - struct xfrm_state_afinfo *afinfo; - struct module *owner; - unsigned int encap; - int flags; -}; - -/* Flags for xfrm_mode. */ -enum { - XFRM_MODE_FLAG_TUNNEL = 1, -}; - -extern int xfrm_register_mode(struct xfrm_mode *mode, int family); -extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); - -static inline int xfrm_af2proto(unsigned int family) -{ - switch(family) { - case AF_INET: - return IPPROTO_IPIP; - case AF_INET6: - return IPPROTO_IPV6; - default: - return 0; - } -} - -static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) -{ - if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || - (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) - return x->inner_mode; - else - return x->inner_mode_iaf; -} - -struct xfrm_tmpl { -/* id in template is interpreted as: - * daddr - destination of tunnel, may be zero for transport mode. - * spi - zero to acquire spi. Not zero if spi is static, then - * daddr must be fixed too. - * proto - AH/ESP/IPCOMP - */ - struct xfrm_id id; - -/* Source address of tunnel. Ignored, if it is not a tunnel. */ - xfrm_address_t saddr; - - unsigned short encap_family; - - u32 reqid; - -/* Mode: transport, tunnel etc. */ - u8 mode; - -/* Sharing mode: unique, this session only, this user only etc. */ - u8 share; - -/* May skip this transfomration if no SA is found */ - u8 optional; - -/* Skip aalgos/ealgos/calgos checks. */ - u8 allalgs; - -/* Bit mask of algos allowed for acquisition */ - u32 aalgos; - u32 ealgos; - u32 calgos; -}; - -#define XFRM_MAX_DEPTH 6 - -struct xfrm_policy_walk_entry { - struct list_head all; - u8 dead; -}; - -struct xfrm_policy_walk { - struct xfrm_policy_walk_entry walk; - u8 type; - u32 seq; -}; - -struct xfrm_policy { -#ifdef CONFIG_NET_NS - struct net *xp_net; -#endif - struct hlist_node bydst; - struct hlist_node byidx; - - /* This lock only affects elements except for entry. */ - rwlock_t lock; - atomic_t refcnt; - struct timer_list timer; - - struct flow_cache_object flo; - atomic_t genid; - u32 priority; - u32 index; - struct xfrm_mark mark; - struct xfrm_selector selector; - struct xfrm_lifetime_cfg lft; - struct xfrm_lifetime_cur curlft; - struct xfrm_policy_walk_entry walk; - u8 type; - u8 action; - u8 flags; - u8 xfrm_nr; - u16 family; - struct xfrm_sec_ctx *security; - struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; -}; - -static inline struct net *xp_net(const struct xfrm_policy *xp) -{ - return read_pnet(&xp->xp_net); -} - -struct xfrm_kmaddress { - xfrm_address_t local; - xfrm_address_t remote; - u32 reserved; - u16 family; -}; - -struct xfrm_migrate { - xfrm_address_t old_daddr; - xfrm_address_t old_saddr; - xfrm_address_t new_daddr; - xfrm_address_t new_saddr; - u8 proto; - u8 mode; - u16 reserved; - u32 reqid; - u16 old_family; - u16 new_family; -}; - -#define XFRM_KM_TIMEOUT 30 -/* which seqno */ -#define XFRM_REPLAY_SEQ 1 -#define XFRM_REPLAY_OSEQ 2 -#define XFRM_REPLAY_SEQ_MASK 3 -/* what happened */ -#define XFRM_REPLAY_UPDATE XFRM_AE_CR -#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE - -/* default aevent timeout in units of 100ms */ -#define XFRM_AE_ETIME 10 -/* Async Event timer multiplier */ -#define XFRM_AE_ETH_M 10 -/* default seq threshold size */ -#define XFRM_AE_SEQT_SIZE 2 - -struct xfrm_mgr { - struct list_head list; - char *id; - int (*notify)(struct xfrm_state *x, const struct km_event *c); - int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); - struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); - int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); - int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); - int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); - int (*migrate)(const struct xfrm_selector *sel, - u8 dir, u8 type, - const struct xfrm_migrate *m, - int num_bundles, - const struct xfrm_kmaddress *k); -}; - -extern int xfrm_register_km(struct xfrm_mgr *km); -extern int xfrm_unregister_km(struct xfrm_mgr *km); - -/* - * This structure is used for the duration where packets are being - * transformed by IPsec. As soon as the packet leaves IPsec the - * area beyond the generic IP part may be overwritten. - */ -struct xfrm_skb_cb { - union { - struct inet_skb_parm h4; - struct inet6_skb_parm h6; - } header; - - /* Sequence number for replay protection. */ - union { - struct { - __u32 low; - __u32 hi; - } output; - struct { - __be32 low; - __be32 hi; - } input; - } seq; -}; - -#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) - -/* - * This structure is used by the afinfo prepare_input/prepare_output functions - * to transmit header information to the mode input/output functions. - */ -struct xfrm_mode_skb_cb { - union { - struct inet_skb_parm h4; - struct inet6_skb_parm h6; - } header; - - /* Copied from header for IPv4, always set to zero and DF for IPv6. */ - __be16 id; - __be16 frag_off; - - /* IP header length (excluding options or extension headers). */ - u8 ihl; - - /* TOS for IPv4, class for IPv6. */ - u8 tos; - - /* TTL for IPv4, hop limitfor IPv6. */ - u8 ttl; - - /* Protocol for IPv4, NH for IPv6. */ - u8 protocol; - - /* Option length for IPv4, zero for IPv6. */ - u8 optlen; - - /* Used by IPv6 only, zero for IPv4. */ - u8 flow_lbl[3]; -}; - -#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) - -/* - * This structure is used by the input processing to locate the SPI and - * related information. - */ -struct xfrm_spi_skb_cb { - union { - struct inet_skb_parm h4; - struct inet6_skb_parm h6; - } header; - - unsigned int daddroff; - unsigned int family; -}; - -#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) - -/* Audit Information */ -struct xfrm_audit { - u32 secid; - uid_t loginuid; - u32 sessionid; -}; - -#ifdef CONFIG_AUDITSYSCALL -static inline struct audit_buffer *xfrm_audit_start(const char *op) -{ - struct audit_buffer *audit_buf = NULL; - - if (audit_enabled == 0) - return NULL; - audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, - AUDIT_MAC_IPSEC_EVENT); - if (audit_buf == NULL) - return NULL; - audit_log_format(audit_buf, "op=%s", op); - return audit_buf; -} - -static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, - struct audit_buffer *audit_buf) -{ - char *secctx; - u32 secctx_len; - - audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); - if (secid != 0 && - security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { - audit_log_format(audit_buf, " subj=%s", secctx); - security_release_secctx(secctx, secctx_len); - } else - audit_log_task_context(audit_buf); -} - -extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, - u32 auid, u32 ses, u32 secid); -extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, - u32 auid, u32 ses, u32 secid); -extern void xfrm_audit_state_add(struct xfrm_state *x, int result, - u32 auid, u32 ses, u32 secid); -extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, - u32 auid, u32 ses, u32 secid); -extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, - struct sk_buff *skb); -extern void xfrm_audit_state_replay(struct xfrm_state *x, - struct sk_buff *skb, __be32 net_seq); -extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); -extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, - __be32 net_spi, __be32 net_seq); -extern void xfrm_audit_state_icvfail(struct xfrm_state *x, - struct sk_buff *skb, u8 proto); -#else - -static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, - u32 auid, u32 ses, u32 secid) -{ -} - -static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, - u32 auid, u32 ses, u32 secid) -{ -} - -static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, - u32 auid, u32 ses, u32 secid) -{ -} - -static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, - u32 auid, u32 ses, u32 secid) -{ -} - -static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, - struct sk_buff *skb) -{ -} - -static inline void xfrm_audit_state_replay(struct xfrm_state *x, - struct sk_buff *skb, __be32 net_seq) -{ -} - -static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, - u16 family) -{ -} - -static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, - __be32 net_spi, __be32 net_seq) -{ -} - -static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, - struct sk_buff *skb, u8 proto) -{ -} -#endif /* CONFIG_AUDITSYSCALL */ - -static inline void xfrm_pol_hold(struct xfrm_policy *policy) -{ - if (likely(policy != NULL)) - atomic_inc(&policy->refcnt); -} - -extern void xfrm_policy_destroy(struct xfrm_policy *policy); - -static inline void xfrm_pol_put(struct xfrm_policy *policy) -{ - if (atomic_dec_and_test(&policy->refcnt)) - xfrm_policy_destroy(policy); -} - -static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) -{ - int i; - for (i = npols - 1; i >= 0; --i) - xfrm_pol_put(pols[i]); -} - -extern void __xfrm_state_destroy(struct xfrm_state *); - -static inline void __xfrm_state_put(struct xfrm_state *x) -{ - atomic_dec(&x->refcnt); -} - -static inline void xfrm_state_put(struct xfrm_state *x) -{ - if (atomic_dec_and_test(&x->refcnt)) - __xfrm_state_destroy(x); -} - -static inline void xfrm_state_hold(struct xfrm_state *x) -{ - atomic_inc(&x->refcnt); -} - -static inline bool addr_match(const void *token1, const void *token2, - int prefixlen) -{ - const __be32 *a1 = token1; - const __be32 *a2 = token2; - int pdw; - int pbi; - - pdw = prefixlen >> 5; /* num of whole u32 in prefix */ - pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ - - if (pdw) - if (memcmp(a1, a2, pdw << 2)) - return false; - - if (pbi) { - __be32 mask; - - mask = htonl((0xffffffff) << (32 - pbi)); - - if ((a1[pdw] ^ a2[pdw]) & mask) - return false; - } - - return true; -} - -static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) -{ - /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ - if (prefixlen == 0) - return true; - return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); -} - -static __inline__ -__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) -{ - __be16 port; - switch(fl->flowi_proto) { - case IPPROTO_TCP: - case IPPROTO_UDP: - case IPPROTO_UDPLITE: - case IPPROTO_SCTP: - port = uli->ports.sport; - break; - case IPPROTO_ICMP: - case IPPROTO_ICMPV6: - port = htons(uli->icmpt.type); - break; - case IPPROTO_MH: - port = htons(uli->mht.type); - break; - case IPPROTO_GRE: - port = htons(ntohl(uli->gre_key) >> 16); - break; - default: - port = 0; /*XXX*/ - } - return port; -} - -static __inline__ -__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) -{ - __be16 port; - switch(fl->flowi_proto) { - case IPPROTO_TCP: - case IPPROTO_UDP: - case IPPROTO_UDPLITE: - case IPPROTO_SCTP: - port = uli->ports.dport; - break; - case IPPROTO_ICMP: - case IPPROTO_ICMPV6: - port = htons(uli->icmpt.code); - break; - case IPPROTO_GRE: - port = htons(ntohl(uli->gre_key) & 0xffff); - break; - default: - port = 0; /*XXX*/ - } - return port; -} - -extern int xfrm_selector_match(const struct xfrm_selector *sel, - const struct flowi *fl, - unsigned short family); - -#ifdef CONFIG_SECURITY_NETWORK_XFRM -/* If neither has a context --> match - * Otherwise, both must have a context and the sids, doi, alg must match - */ -static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) -{ - return ((!s1 && !s2) || - (s1 && s2 && - (s1->ctx_sid == s2->ctx_sid) && - (s1->ctx_doi == s2->ctx_doi) && - (s1->ctx_alg == s2->ctx_alg))); -} -#else -static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) -{ - return 1; -} -#endif - -/* A struct encoding bundle of transformations to apply to some set of flow. - * - * dst->child points to the next element of bundle. - * dst->xfrm points to an instanse of transformer. - * - * Due to unfortunate limitations of current routing cache, which we - * have no time to fix, it mirrors struct rtable and bound to the same - * routing key, including saddr,daddr. However, we can have many of - * bundles differing by session id. All the bundles grow from a parent - * policy rule. - */ -struct xfrm_dst { - union { - struct dst_entry dst; - struct rtable rt; - struct rt6_info rt6; - } u; - struct dst_entry *route; - struct flow_cache_object flo; - struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; - int num_pols, num_xfrms; -#ifdef CONFIG_XFRM_SUB_POLICY - struct flowi *origin; - struct xfrm_selector *partner; -#endif - u32 xfrm_genid; - u32 policy_genid; - u32 route_mtu_cached; - u32 child_mtu_cached; - u32 route_cookie; - u32 path_cookie; -}; - -#ifdef CONFIG_XFRM -static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) -{ - xfrm_pols_put(xdst->pols, xdst->num_pols); - dst_release(xdst->route); - if (likely(xdst->u.dst.xfrm)) - xfrm_state_put(xdst->u.dst.xfrm); -#ifdef CONFIG_XFRM_SUB_POLICY - kfree(xdst->origin); - xdst->origin = NULL; - kfree(xdst->partner); - xdst->partner = NULL; -#endif -} -#endif - -extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); - -struct sec_path { - atomic_t refcnt; - int len; - struct xfrm_state *xvec[XFRM_MAX_DEPTH]; -}; - -static inline int secpath_exists(struct sk_buff *skb) -{ -#ifdef CONFIG_XFRM - return skb->sp != NULL; -#else - return 0; -#endif -} - -static inline struct sec_path * -secpath_get(struct sec_path *sp) -{ - if (sp) - atomic_inc(&sp->refcnt); - return sp; -} - -extern void __secpath_destroy(struct sec_path *sp); - -static inline void -secpath_put(struct sec_path *sp) -{ - if (sp && atomic_dec_and_test(&sp->refcnt)) - __secpath_destroy(sp); -} - -extern struct sec_path *secpath_dup(struct sec_path *src); - -static inline void -secpath_reset(struct sk_buff *skb) -{ -#ifdef CONFIG_XFRM - secpath_put(skb->sp); - skb->sp = NULL; -#endif -} - -static inline int -xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) -{ - switch (family) { - case AF_INET: - return addr->a4 == 0; - case AF_INET6: - return ipv6_addr_any((struct in6_addr *)&addr->a6); - } - return 0; -} - -static inline int -__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) -{ - return (tmpl->saddr.a4 && - tmpl->saddr.a4 != x->props.saddr.a4); -} - -static inline int -__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) -{ - return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && - ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); -} - -static inline int -xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) -{ - switch (family) { - case AF_INET: - return __xfrm4_state_addr_cmp(tmpl, x); - case AF_INET6: - return __xfrm6_state_addr_cmp(tmpl, x); - } - return !0; -} - -#ifdef CONFIG_XFRM -extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); - -static inline int __xfrm_policy_check2(struct sock *sk, int dir, - struct sk_buff *skb, - unsigned int family, int reverse) -{ - struct net *net = dev_net(skb->dev); - int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); - - if (sk && sk->sk_policy[XFRM_POLICY_IN]) - return __xfrm_policy_check(sk, ndir, skb, family); - - return (!net->xfrm.policy_count[dir] && !skb->sp) || - (skb_dst(skb)->flags & DST_NOPOLICY) || - __xfrm_policy_check(sk, ndir, skb, family); -} - -static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) -{ - return __xfrm_policy_check2(sk, dir, skb, family, 0); -} - -static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) -{ - return xfrm_policy_check(sk, dir, skb, AF_INET); -} - -static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) -{ - return xfrm_policy_check(sk, dir, skb, AF_INET6); -} - -static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, - struct sk_buff *skb) -{ - return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); -} - -static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, - struct sk_buff *skb) -{ - return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); -} - -extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, - unsigned int family, int reverse); - -static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, - unsigned int family) -{ - return __xfrm_decode_session(skb, fl, family, 0); -} - -static inline int xfrm_decode_session_reverse(struct sk_buff *skb, - struct flowi *fl, - unsigned int family) -{ - return __xfrm_decode_session(skb, fl, family, 1); -} - -extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); - -static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) -{ - struct net *net = dev_net(skb->dev); - - return !net->xfrm.policy_count[XFRM_POLICY_OUT] || - (skb_dst(skb)->flags & DST_NOXFRM) || - __xfrm_route_forward(skb, family); -} - -static inline int xfrm4_route_forward(struct sk_buff *skb) -{ - return xfrm_route_forward(skb, AF_INET); -} - -static inline int xfrm6_route_forward(struct sk_buff *skb) -{ - return xfrm_route_forward(skb, AF_INET6); -} - -extern int __xfrm_sk_clone_policy(struct sock *sk); - -static inline int xfrm_sk_clone_policy(struct sock *sk) -{ - if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) - return __xfrm_sk_clone_policy(sk); - return 0; -} - -extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); - -static inline void xfrm_sk_free_policy(struct sock *sk) -{ - if (unlikely(sk->sk_policy[0] != NULL)) { - xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); - sk->sk_policy[0] = NULL; - } - if (unlikely(sk->sk_policy[1] != NULL)) { - xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); - sk->sk_policy[1] = NULL; - } -} - -#else - -static inline void xfrm_sk_free_policy(struct sock *sk) {} -static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } -static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } -static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } -static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) -{ - return 1; -} -static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) -{ - return 1; -} -static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) -{ - return 1; -} -static inline int xfrm_decode_session_reverse(struct sk_buff *skb, - struct flowi *fl, - unsigned int family) -{ - return -ENOSYS; -} -static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, - struct sk_buff *skb) -{ - return 1; -} -static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, - struct sk_buff *skb) -{ - return 1; -} -#endif - -static __inline__ -xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) -{ - switch (family){ - case AF_INET: - return (xfrm_address_t *)&fl->u.ip4.daddr; - case AF_INET6: - return (xfrm_address_t *)&fl->u.ip6.daddr; - } - return NULL; -} - -static __inline__ -xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) -{ - switch (family){ - case AF_INET: - return (xfrm_address_t *)&fl->u.ip4.saddr; - case AF_INET6: - return (xfrm_address_t *)&fl->u.ip6.saddr; - } - return NULL; -} - -static __inline__ -void xfrm_flowi_addr_get(const struct flowi *fl, - xfrm_address_t *saddr, xfrm_address_t *daddr, - unsigned short family) -{ - switch(family) { - case AF_INET: - memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); - memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); - break; - case AF_INET6: - *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; - *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; - break; - } -} - -static __inline__ int -__xfrm4_state_addr_check(const struct xfrm_state *x, - const xfrm_address_t *daddr, const xfrm_address_t *saddr) -{ - if (daddr->a4 == x->id.daddr.a4 && - (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) - return 1; - return 0; -} - -static __inline__ int -__xfrm6_state_addr_check(const struct xfrm_state *x, - const xfrm_address_t *daddr, const xfrm_address_t *saddr) -{ - if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && - (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| - ipv6_addr_any((struct in6_addr *)saddr) || - ipv6_addr_any((struct in6_addr *)&x->props.saddr))) - return 1; - return 0; -} - -static __inline__ int -xfrm_state_addr_check(const struct xfrm_state *x, - const xfrm_address_t *daddr, const xfrm_address_t *saddr, - unsigned short family) -{ - switch (family) { - case AF_INET: - return __xfrm4_state_addr_check(x, daddr, saddr); - case AF_INET6: - return __xfrm6_state_addr_check(x, daddr, saddr); - } - return 0; -} - -static __inline__ int -xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, - unsigned short family) -{ - switch (family) { - case AF_INET: - return __xfrm4_state_addr_check(x, - (const xfrm_address_t *)&fl->u.ip4.daddr, - (const xfrm_address_t *)&fl->u.ip4.saddr); - case AF_INET6: - return __xfrm6_state_addr_check(x, - (const xfrm_address_t *)&fl->u.ip6.daddr, - (const xfrm_address_t *)&fl->u.ip6.saddr); - } - return 0; -} - -static inline int xfrm_state_kern(const struct xfrm_state *x) -{ - return atomic_read(&x->tunnel_users); -} - -static inline int xfrm_id_proto_match(u8 proto, u8 userproto) -{ - return (!userproto || proto == userproto || - (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || - proto == IPPROTO_ESP || - proto == IPPROTO_COMP))); -} - -/* - * xfrm algorithm information - */ -struct xfrm_algo_aead_info { - u16 icv_truncbits; -}; - -struct xfrm_algo_auth_info { - u16 icv_truncbits; - u16 icv_fullbits; -}; - -struct xfrm_algo_encr_info { - u16 blockbits; - u16 defkeybits; -}; - -struct xfrm_algo_comp_info { - u16 threshold; -}; - -struct xfrm_algo_desc { - char *name; - char *compat; - u8 available:1; - union { - struct xfrm_algo_aead_info aead; - struct xfrm_algo_auth_info auth; - struct xfrm_algo_encr_info encr; - struct xfrm_algo_comp_info comp; - } uinfo; - struct sadb_alg desc; -}; - -/* XFRM tunnel handlers. */ -struct xfrm_tunnel { - int (*handler)(struct sk_buff *skb); - int (*err_handler)(struct sk_buff *skb, u32 info); - - struct xfrm_tunnel __rcu *next; - int priority; -}; - -struct xfrm6_tunnel { - int (*handler)(struct sk_buff *skb); - int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, - u8 type, u8 code, int offset, __be32 info); - struct xfrm6_tunnel __rcu *next; - int priority; -}; - -extern void xfrm_init(void); -extern void xfrm4_init(int rt_hash_size); -extern int xfrm_state_init(struct net *net); -extern void xfrm_state_fini(struct net *net); -extern void xfrm4_state_init(void); -#ifdef CONFIG_XFRM -extern int xfrm6_init(void); -extern void xfrm6_fini(void); -extern int xfrm6_state_init(void); -extern void xfrm6_state_fini(void); -#else -static inline int xfrm6_init(void) -{ - return 0; -} -static inline void xfrm6_fini(void) -{ - ; -} -#endif - -#ifdef CONFIG_XFRM_STATISTICS -extern int xfrm_proc_init(struct net *net); -extern void xfrm_proc_fini(struct net *net); -#endif - -extern int xfrm_sysctl_init(struct net *net); -#ifdef CONFIG_SYSCTL -extern void xfrm_sysctl_fini(struct net *net); -#else -static inline void xfrm_sysctl_fini(struct net *net) -{ -} -#endif - -extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); -extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, - int (*func)(struct xfrm_state *, int, void*), void *); -extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); -extern struct xfrm_state *xfrm_state_alloc(struct net *net); -extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, - const xfrm_address_t *saddr, - const struct flowi *fl, - struct xfrm_tmpl *tmpl, - struct xfrm_policy *pol, int *err, - unsigned short family); -extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, - xfrm_address_t *daddr, - xfrm_address_t *saddr, - unsigned short family, - u8 mode, u8 proto, u32 reqid); -extern int xfrm_state_check_expire(struct xfrm_state *x); -extern void xfrm_state_insert(struct xfrm_state *x); -extern int xfrm_state_add(struct xfrm_state *x); -extern int xfrm_state_update(struct xfrm_state *x); -extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, - const xfrm_address_t *daddr, __be32 spi, - u8 proto, unsigned short family); -extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, - const xfrm_address_t *daddr, - const xfrm_address_t *saddr, - u8 proto, - unsigned short family); -#ifdef CONFIG_XFRM_SUB_POLICY -extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, - int n, unsigned short family); -extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, - int n, unsigned short family); -#else -static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, - int n, unsigned short family) -{ - return -ENOSYS; -} - -static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, - int n, unsigned short family) -{ - return -ENOSYS; -} -#endif - -struct xfrmk_sadinfo { - u32 sadhcnt; /* current hash bkts */ - u32 sadhmcnt; /* max allowed hash bkts */ - u32 sadcnt; /* current running count */ -}; - -struct xfrmk_spdinfo { - u32 incnt; - u32 outcnt; - u32 fwdcnt; - u32 inscnt; - u32 outscnt; - u32 fwdscnt; - u32 spdhcnt; - u32 spdhmcnt; -}; - -extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, - u32 seq); -extern int xfrm_state_delete(struct xfrm_state *x); -extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); -extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); -extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); -extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); -extern int xfrm_init_replay(struct xfrm_state *x); -extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); -extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); -extern int xfrm_init_state(struct xfrm_state *x); -extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, - int encap_type); -extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); -extern int xfrm_output_resume(struct sk_buff *skb, int err); -extern int xfrm_output(struct sk_buff *skb); -extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm4_extract_header(struct sk_buff *skb); -extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, - int encap_type); -extern int xfrm4_transport_finish(struct sk_buff *skb, int async); -extern int xfrm4_rcv(struct sk_buff *skb); - -static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) -{ - return xfrm4_rcv_encap(skb, nexthdr, spi, 0); -} - -extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm4_output(struct sk_buff *skb); -extern int xfrm4_output_finish(struct sk_buff *skb); -extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); -extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); -extern int xfrm6_extract_header(struct sk_buff *skb); -extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); -extern int xfrm6_transport_finish(struct sk_buff *skb, int async); -extern int xfrm6_rcv(struct sk_buff *skb); -extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, - xfrm_address_t *saddr, u8 proto); -extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); -extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); -extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); -extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); -extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); -extern int xfrm6_output(struct sk_buff *skb); -extern int xfrm6_output_finish(struct sk_buff *skb); -extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, - u8 **prevhdr); - -#ifdef CONFIG_XFRM -extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); -extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); -#else -static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) -{ - return -ENOPROTOOPT; -} - -static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) -{ - /* should not happen */ - kfree_skb(skb); - return 0; -} -#endif - -struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); - -extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); -extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, - int (*func)(struct xfrm_policy *, int, int, void*), void *); -extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); -int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); -struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, - u8 type, int dir, - struct xfrm_selector *sel, - struct xfrm_sec_ctx *ctx, int delete, - int *err); -struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); -int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); -u32 xfrm_get_acqseq(void); -extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); -struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, - u8 mode, u32 reqid, u8 proto, - const xfrm_address_t *daddr, - const xfrm_address_t *saddr, int create, - unsigned short family); -extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); - -#ifdef CONFIG_XFRM_MIGRATE -extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, - const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k); -extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); -extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, - struct xfrm_migrate *m); -extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, - struct xfrm_migrate *m, int num_bundles, - struct xfrm_kmaddress *k); -#endif - -extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); -extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); -extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); - -extern void xfrm_input_init(void); -extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); - -extern void xfrm_probe_algs(void); -extern int xfrm_count_auth_supported(void); -extern int xfrm_count_enc_supported(void); -extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); -extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); -extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); -extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); -extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); -extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); -extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); -extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); -extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, - int probe); - -static inline int xfrm_addr_cmp(const xfrm_address_t *a, - const xfrm_address_t *b, - int family) -{ - switch (family) { - default: - case AF_INET: - return (__force u32)a->a4 - (__force u32)b->a4; - case AF_INET6: - return ipv6_addr_cmp((const struct in6_addr *)a, - (const struct in6_addr *)b); - } -} - -static inline int xfrm_policy_id2dir(u32 index) -{ - return index & 7; -} - -#ifdef CONFIG_XFRM -static inline int xfrm_aevent_is_on(struct net *net) -{ - struct sock *nlsk; - int ret = 0; - - rcu_read_lock(); - nlsk = rcu_dereference(net->xfrm.nlsk); - if (nlsk) - ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); - rcu_read_unlock(); - return ret; -} -#endif - -static inline int xfrm_alg_len(const struct xfrm_algo *alg) -{ - return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); -} - -static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) -{ - return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); -} - -static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) -{ - return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); -} - -#ifdef CONFIG_XFRM_MIGRATE -static inline int xfrm_replay_clone(struct xfrm_state *x, - struct xfrm_state *orig) -{ - x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), - GFP_KERNEL); - if (!x->replay_esn) - return -ENOMEM; - - x->replay_esn->bmp_len = orig->replay_esn->bmp_len; - x->replay_esn->replay_window = orig->replay_esn->replay_window; - - x->preplay_esn = kmemdup(x->replay_esn, - xfrm_replay_state_esn_len(x->replay_esn), - GFP_KERNEL); - if (!x->preplay_esn) { - kfree(x->replay_esn); - return -ENOMEM; - } - - return 0; -} - -static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) -{ - return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); -} - -static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) -{ - return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); -} - -static inline void xfrm_states_put(struct xfrm_state **states, int n) -{ - int i; - for (i = 0; i < n; i++) - xfrm_state_put(*(states + i)); -} - -static inline void xfrm_states_delete(struct xfrm_state **states, int n) -{ - int i; - for (i = 0; i < n; i++) - xfrm_state_delete(*(states + i)); -} -#endif - -#ifdef CONFIG_XFRM -static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) -{ - return skb->sp->xvec[skb->sp->len - 1]; -} -#endif - -static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) -{ - if (attrs[XFRMA_MARK]) - memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); - else - m->v = m->m = 0; - - return m->v & m->m; -} - -static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) -{ - if (m->m | m->v) - NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); - return 0; - -nla_put_failure: - return -1; -} - -#endif /* _NET_XFRM_H */ |