| #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 <net/sock.h> |
| #include <net/dst.h> |
| #include <net/ip.h> |
| #include <net/route.h> |
| #include <net/ipv6.h> |
| #include <net/ip6_fib.h> |
| |
| #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_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)) |
| |
| extern struct sock *xfrm_nl; |
| extern u32 sysctl_xfrm_aevent_etime; |
| extern u32 sysctl_xfrm_aevent_rseqth; |
| extern int sysctl_xfrm_larval_drop; |
| extern u32 sysctl_xfrm_acq_expires; |
| |
| 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. |
| */ |
| |
| /* Full description of state of transformer. */ |
| struct xfrm_state |
| { |
| /* Note: bydst is re-used during gc */ |
| 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; |
| |
| u32 genid; |
| |
| /* Key manger bits */ |
| struct { |
| u8 state; |
| u8 dying; |
| u32 seq; |
| } 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 *aalg; |
| struct xfrm_algo *ealg; |
| struct xfrm_algo *calg; |
| |
| /* 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; |
| |
| /* Replay detection state at the time we sent the last notification */ |
| struct xfrm_replay_state preplay; |
| |
| /* 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 timer_list timer; |
| |
| /* Last used time */ |
| u64 lastused; |
| |
| /* Reference to data common to all the instances of this |
| * transformer. */ |
| struct xfrm_type *type; |
| struct xfrm_mode *inner_mode; |
| 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; |
| }; |
| |
| /* 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_device; |
| struct xfrm_type; |
| struct xfrm_dst; |
| struct xfrm_policy_afinfo { |
| unsigned short family; |
| struct dst_ops *dst_ops; |
| void (*garbage_collect)(void); |
| struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, |
| xfrm_address_t *daddr); |
| int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); |
| struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
| void (*decode_session)(struct sk_buff *skb, |
| struct flowi *fl); |
| int (*get_tos)(struct flowi *fl); |
| int (*fill_dst)(struct xfrm_dst *xdst, |
| struct net_device *dev); |
| }; |
| |
| 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, struct km_event *c); |
| extern void km_state_notify(struct xfrm_state *x, 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; |
| unsigned int eth_proto; |
| unsigned int nf_post_routing; |
| struct module *owner; |
| 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_state *x, struct flowi *fl, |
| struct xfrm_tmpl *tmpl, |
| xfrm_address_t *daddr, 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 (*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 *, 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(struct xfrm_type *type, unsigned short family); |
| extern int xfrm_unregister_type(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); |
| |
| 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; |
| |
| /* Bit mask of algos allowed for acquisition */ |
| __u32 aalgos; |
| __u32 ealgos; |
| __u32 calgos; |
| }; |
| |
| #define XFRM_MAX_DEPTH 6 |
| |
| struct xfrm_policy |
| { |
| struct xfrm_policy *next; |
| 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; |
| |
| u32 priority; |
| u32 index; |
| struct xfrm_selector selector; |
| struct xfrm_lifetime_cfg lft; |
| struct xfrm_lifetime_cur curlft; |
| struct dst_entry *bundles; |
| u16 family; |
| u8 type; |
| u8 action; |
| u8 flags; |
| u8 dead; |
| u8 xfrm_nr; |
| /* XXX 1 byte hole, try to pack */ |
| struct xfrm_sec_ctx *security; |
| struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
| }; |
| |
| 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, 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, struct km_event *c); |
| int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
| int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); |
| }; |
| |
| extern int xfrm_register_km(struct xfrm_mgr *km); |
| extern int xfrm_unregister_km(struct xfrm_mgr *km); |
| |
| extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; |
| |
| /* |
| * 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. */ |
| u64 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; |
| |
| /* TOS for IPv4, class for IPv6. */ |
| u8 tos; |
| |
| /* TTL for IPv4, hop limitfor IPv6. */ |
| u8 ttl; |
| |
| /* Protocol for IPv4, NH for IPv6. */ |
| u8 protocol; |
| |
| /* 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 nhoff; |
| unsigned int daddroff; |
| }; |
| |
| #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) |
| |
| /* Audit Information */ |
| struct xfrm_audit |
| { |
| u32 loginuid; |
| u32 secid; |
| }; |
| |
| #ifdef CONFIG_AUDITSYSCALL |
| static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) |
| { |
| struct audit_buffer *audit_buf = NULL; |
| char *secctx; |
| u32 secctx_len; |
| |
| 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, "auid=%u", auid); |
| |
| if (sid != 0 && |
| security_secid_to_secctx(sid, &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); |
| return audit_buf; |
| } |
| |
| extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
| u32 auid, u32 sid); |
| extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
| u32 auid, u32 sid); |
| extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
| u32 auid, u32 sid); |
| extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
| u32 auid, u32 sid); |
| #else |
| #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) |
| #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) |
| #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) |
| #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) |
| #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); |
| } |
| |
| #ifdef CONFIG_XFRM_SUB_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]); |
| } |
| #else |
| static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
| { |
| xfrm_pol_put(pols[0]); |
| } |
| #endif |
| |
| 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__ int addr_match(void *token1, void *token2, int prefixlen) |
| { |
| __be32 *a1 = token1; |
| __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 0; |
| |
| if (pbi) { |
| __be32 mask; |
| |
| mask = htonl((0xffffffff) << (32 - pbi)); |
| |
| if ((a1[pdw] ^ a2[pdw]) & mask) |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static __inline__ |
| __be16 xfrm_flowi_sport(struct flowi *fl) |
| { |
| __be16 port; |
| switch(fl->proto) { |
| case IPPROTO_TCP: |
| case IPPROTO_UDP: |
| case IPPROTO_UDPLITE: |
| case IPPROTO_SCTP: |
| port = fl->fl_ip_sport; |
| break; |
| case IPPROTO_ICMP: |
| case IPPROTO_ICMPV6: |
| port = htons(fl->fl_icmp_type); |
| break; |
| case IPPROTO_MH: |
| port = htons(fl->fl_mh_type); |
| break; |
| default: |
| port = 0; /*XXX*/ |
| } |
| return port; |
| } |
| |
| static __inline__ |
| __be16 xfrm_flowi_dport(struct flowi *fl) |
| { |
| __be16 port; |
| switch(fl->proto) { |
| case IPPROTO_TCP: |
| case IPPROTO_UDP: |
| case IPPROTO_UDPLITE: |
| case IPPROTO_SCTP: |
| port = fl->fl_ip_dport; |
| break; |
| case IPPROTO_ICMP: |
| case IPPROTO_ICMPV6: |
| port = htons(fl->fl_icmp_code); |
| break; |
| default: |
| port = 0; /*XXX*/ |
| } |
| return port; |
| } |
| |
| extern int xfrm_selector_match(struct xfrm_selector *sel, 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; |
| #ifdef CONFIG_XFRM_SUB_POLICY |
| struct flowi *origin; |
| struct xfrm_selector *partner; |
| #endif |
| u32 genid; |
| u32 route_mtu_cached; |
| u32 child_mtu_cached; |
| u32 route_cookie; |
| u32 path_cookie; |
| }; |
| |
| static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
| { |
| 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 |
| } |
| |
| 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 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(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(struct xfrm_tmpl *tmpl, struct xfrm_state *x) |
| { |
| return (tmpl->saddr.a4 && |
| tmpl->saddr.a4 != x->props.saddr.a4); |
| } |
| |
| static inline int |
| __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, 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(struct xfrm_tmpl *tmpl, 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_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
| { |
| if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
| return __xfrm_policy_check(sk, dir, skb, family); |
| |
| return (!xfrm_policy_count[dir] && !skb->sp) || |
| (skb->dst->flags & DST_NOPOLICY) || |
| __xfrm_policy_check(sk, dir, skb, family); |
| } |
| |
| 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); |
| } |
| |
| extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); |
| 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) |
| { |
| return !xfrm_policy_count[XFRM_POLICY_OUT] || |
| (skb->dst->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; |
| } |
| #endif |
| |
| static __inline__ |
| xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) |
| { |
| switch (family){ |
| case AF_INET: |
| return (xfrm_address_t *)&fl->fl4_dst; |
| case AF_INET6: |
| return (xfrm_address_t *)&fl->fl6_dst; |
| } |
| return NULL; |
| } |
| |
| static __inline__ |
| xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) |
| { |
| switch (family){ |
| case AF_INET: |
| return (xfrm_address_t *)&fl->fl4_src; |
| case AF_INET6: |
| return (xfrm_address_t *)&fl->fl6_src; |
| } |
| return NULL; |
| } |
| |
| static __inline__ int |
| __xfrm4_state_addr_check(struct xfrm_state *x, |
| xfrm_address_t *daddr, 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(struct xfrm_state *x, |
| xfrm_address_t *daddr, 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(struct xfrm_state *x, |
| xfrm_address_t *daddr, 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(struct xfrm_state *x, struct flowi *fl, |
| unsigned short family) |
| { |
| switch (family) { |
| case AF_INET: |
| return __xfrm4_state_addr_check(x, |
| (xfrm_address_t *)&fl->fl4_dst, |
| (xfrm_address_t *)&fl->fl4_src); |
| case AF_INET6: |
| return __xfrm6_state_addr_check(x, |
| (xfrm_address_t *)&fl->fl6_dst, |
| (xfrm_address_t *)&fl->fl6_src); |
| } |
| return 0; |
| } |
| |
| static inline int xfrm_state_kern(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_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_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 *next; |
| int priority; |
| }; |
| |
| struct xfrm6_tunnel { |
| int (*handler)(struct sk_buff *skb); |
| int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
| int type, int code, int offset, __be32 info); |
| struct xfrm6_tunnel *next; |
| int priority; |
| }; |
| |
| extern void xfrm_init(void); |
| extern void xfrm4_init(void); |
| extern void xfrm6_init(void); |
| extern void xfrm6_fini(void); |
| extern void xfrm_state_init(void); |
| extern void xfrm4_state_init(void); |
| extern void xfrm6_state_init(void); |
| extern void xfrm6_state_fini(void); |
| |
| extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); |
| extern struct xfrm_state *xfrm_state_alloc(void); |
| extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
| struct flowi *fl, struct xfrm_tmpl *tmpl, |
| struct xfrm_policy *pol, int *err, |
| unsigned short family); |
| extern struct xfrm_state * xfrm_stateonly_find(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(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); |
| extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, 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(u32 seq); |
| extern int xfrm_state_delete(struct xfrm_state *x); |
| extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); |
| extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); |
| extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); |
| extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); |
| extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
| extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
| extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
| 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_output_resume(struct sk_buff *skb, int err); |
| extern int xfrm_output(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_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(xfrm_address_t *saddr); |
| extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); |
| extern __be32 xfrm6_tunnel_spi_lookup(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_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(gfp_t gfp); |
| extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); |
| int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
| struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, |
| struct xfrm_selector *sel, |
| struct xfrm_sec_ctx *ctx, int delete, |
| int *err); |
| struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); |
| int xfrm_policy_flush(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(u8 mode, u32 reqid, u8 proto, |
| xfrm_address_t *daddr, xfrm_address_t *saddr, |
| int create, unsigned short family); |
| extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
| extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
| extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
| struct flowi *fl, int family, int strict); |
| |
| #ifdef CONFIG_XFRM_MIGRATE |
| extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
| struct xfrm_migrate *m, int num_bundles); |
| 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(struct xfrm_selector *sel, u8 dir, u8 type, |
| struct xfrm_migrate *m, int num_bundles); |
| #endif |
| |
| extern wait_queue_head_t km_waitq; |
| 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(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(char *name, int probe); |
| extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); |
| extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); |
| |
| struct hash_desc; |
| struct scatterlist; |
| typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
| unsigned int); |
| |
| extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
| int offset, int len, icv_update_fn_t icv_update); |
| |
| static inline int xfrm_addr_cmp(xfrm_address_t *a, 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((struct in6_addr *)a, |
| (struct in6_addr *)b); |
| } |
| } |
| |
| static inline int xfrm_policy_id2dir(u32 index) |
| { |
| return index & 7; |
| } |
| |
| static inline int xfrm_aevent_is_on(void) |
| { |
| struct sock *nlsk; |
| int ret = 0; |
| |
| rcu_read_lock(); |
| nlsk = rcu_dereference(xfrm_nl); |
| if (nlsk) |
| ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); |
| rcu_read_unlock(); |
| return ret; |
| } |
| |
| static inline int xfrm_alg_len(struct xfrm_algo *alg) |
| { |
| return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| } |
| |
| #ifdef CONFIG_XFRM_MIGRATE |
| static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
| { |
| return kmemdup(orig, xfrm_alg_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 |
| |
| #endif /* _NET_XFRM_H */ |