This source file includes following definitions.
- xs_net
- xfrm_af2proto
- xfrm_ip2inner_mode
- xp_net
- xfrm_audit_start
- xfrm_audit_helper_usrinfo
- xfrm_audit_policy_add
- xfrm_audit_policy_delete
- xfrm_audit_state_add
- xfrm_audit_state_delete
- xfrm_audit_state_replay_overflow
- xfrm_audit_state_replay
- xfrm_audit_state_notfound_simple
- xfrm_audit_state_notfound
- xfrm_audit_state_icvfail
- xfrm_pol_hold
- xfrm_pol_put
- xfrm_pols_put
- __xfrm_state_put
- xfrm_state_put
- xfrm_state_hold
- addr_match
- addr4_match
- xfrm_flowi_sport
- xfrm_flowi_dport
- xfrm_sec_ctx_match
- xfrm_sec_ctx_match
- xfrm_dst_destroy
- secpath_exists
- secpath_get
- secpath_put
- secpath_reset
- xfrm_addr_any
- __xfrm4_state_addr_cmp
- __xfrm6_state_addr_cmp
- xfrm_state_addr_cmp
- __xfrm_policy_check2
- xfrm_policy_check
- xfrm4_policy_check
- xfrm6_policy_check
- xfrm4_policy_check_reverse
- xfrm6_policy_check_reverse
- xfrm_decode_session
- xfrm_decode_session_reverse
- xfrm_route_forward
- xfrm4_route_forward
- xfrm6_route_forward
- xfrm_sk_clone_policy
- xfrm_sk_free_policy
- xfrm_sk_free_policy
- xfrm_sk_clone_policy
- xfrm6_route_forward
- xfrm4_route_forward
- xfrm6_policy_check
- xfrm4_policy_check
- xfrm_policy_check
- xfrm_decode_session_reverse
- xfrm4_policy_check_reverse
- xfrm6_policy_check_reverse
- xfrm_garbage_collect
- xfrm_flowi_daddr
- xfrm_flowi_saddr
- xfrm_flowi_addr_get
- __xfrm4_state_addr_check
- __xfrm6_state_addr_check
- xfrm_state_addr_check
- xfrm_state_addr_flow_check
- xfrm_state_kern
- xfrm_id_proto_match
- xfrm6_init
- xfrm6_fini
- xfrm_sysctl_fini
- xfrm_tmpl_sort
- xfrm_state_sort
- xfrm4_rcv_spi
- xfrm_user_policy
- xfrm4_udp_encap_rcv
- xfrm6_addr_equal
- xfrm_addr_equal
- xfrm_policy_id2dir
- xfrm_aevent_is_on
- xfrm_acquire_is_on
- aead_len
- xfrm_alg_len
- xfrm_alg_auth_len
- xfrm_replay_state_esn_len
- xfrm_replay_clone
- xfrm_algo_aead_clone
- xfrm_algo_clone
- xfrm_algo_auth_clone
- xfrm_states_put
- xfrm_states_delete
- xfrm_input_state
- xfrm_mark_get
- xfrm_mark_put
- xfrm_tunnel_check
#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
struct xfrm_state_walk {
struct list_head all;
u8 state;
u8 dying;
u8 proto;
u32 seq;
struct xfrm_address_filter *filter;
};
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;
struct xfrm_state_walk km;
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;
u32 extra_flags;
} props;
struct xfrm_lifetime_cfg lft;
struct xfrm_algo_auth *aalg;
struct xfrm_algo *ealg;
struct xfrm_algo *calg;
struct xfrm_algo_aead *aead;
struct xfrm_encap_tmpl *encap;
xfrm_address_t *coaddr;
struct xfrm_state *tunnel;
atomic_t tunnel_users;
struct xfrm_replay_state replay;
struct xfrm_replay_state_esn *replay_esn;
struct xfrm_replay_state preplay;
struct xfrm_replay_state_esn *preplay_esn;
struct xfrm_replay *repl;
u32 xflags;
u32 replay_maxage;
u32 replay_maxdiff;
struct timer_list rtimer;
struct xfrm_stats stats;
struct xfrm_lifetime_cur curlft;
struct tasklet_hrtimer mtimer;
long saved_tmo;
unsigned long lastused;
const struct xfrm_type *type;
struct xfrm_mode *inner_mode;
struct xfrm_mode *inner_mode_iaf;
struct xfrm_mode *outer_mode;
struct xfrm_sec_ctx *security;
void *data;
};
static inline struct net *xs_net(struct xfrm_state *x)
{
return read_pnet(&x->xs_net);
}
#define XFRM_TIME_DEFER 1
#define XFRM_SOFT_EXPIRE 2
enum {
XFRM_STATE_VOID,
XFRM_STATE_ACQ,
XFRM_STATE_VALID,
XFRM_STATE_ERROR,
XFRM_STATE_EXPIRED,
XFRM_STATE_DEAD
};
struct km_event {
union {
u32 hard;
u32 proto;
u32 byid;
u32 aevent;
u32 type;
} data;
u32 seq;
u32 portid;
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);
int (*recheck)(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);
void (*init_dst)(struct net *net,
struct xfrm_dst *dst);
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);
};
int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
void km_policy_notify(struct xfrm_policy *xp, int dir,
const struct km_event *c);
void km_state_notify(struct xfrm_state *x, const struct km_event *c);
struct xfrm_tmpl;
int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
struct xfrm_policy *pol);
void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
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 sock *sk, 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);
void (*local_error)(struct sk_buff *skb, u32 mtu);
};
int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
struct xfrm_input_afinfo {
unsigned int family;
struct module *owner;
int (*callback)(struct sk_buff *skb, u8 protocol,
int err);
};
int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
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 **);
u32 (*get_mtu)(struct xfrm_state *, int size);
};
int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
struct xfrm_mode {
int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
int (*input)(struct xfrm_state *x, struct sk_buff *skb);
int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
int (*output)(struct xfrm_state *x, struct sk_buff *skb);
struct xfrm_state_afinfo *afinfo;
struct module *owner;
unsigned int encap;
int flags;
};
enum {
XFRM_MODE_FLAG_TUNNEL = 1,
};
int xfrm_register_mode(struct xfrm_mode *mode, int family);
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 {
struct xfrm_id id;
xfrm_address_t saddr;
unsigned short encap_family;
u32 reqid;
u8 mode;
u8 share;
u8 optional;
u8 allalgs;
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_queue {
struct sk_buff_head hold_queue;
struct timer_list hold_timer;
unsigned long timeout;
};
struct xfrm_policy {
#ifdef CONFIG_NET_NS
struct net *xp_net;
#endif
struct hlist_node bydst;
struct hlist_node byidx;
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;
struct xfrm_policy_queue polq;
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
#define XFRM_REPLAY_UPDATE XFRM_AE_CR
#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
#define XFRM_AE_ETIME 10
#define XFRM_AE_ETH_M 10
#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);
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);
bool (*is_alive)(const struct km_event *c);
};
int xfrm_register_km(struct xfrm_mgr *km);
int xfrm_unregister_km(struct xfrm_mgr *km);
struct xfrm_tunnel_skb_cb {
union {
struct inet_skb_parm h4;
struct inet6_skb_parm h6;
} header;
union {
struct ip_tunnel *ip4;
struct ip6_tnl *ip6;
} tunnel;
};
#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
struct xfrm_skb_cb {
struct xfrm_tunnel_skb_cb header;
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]))
struct xfrm_mode_skb_cb {
struct xfrm_tunnel_skb_cb header;
__be16 id;
__be16 frag_off;
u8 ihl;
u8 tos;
u8 ttl;
u8 protocol;
u8 optlen;
u8 flow_lbl[3];
};
#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
struct xfrm_spi_skb_cb {
struct xfrm_tunnel_skb_cb header;
unsigned int daddroff;
unsigned int family;
};
#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
#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(bool task_valid,
struct audit_buffer *audit_buf)
{
const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
audit_get_loginuid(current) :
INVALID_UID);
const unsigned int ses = task_valid ? audit_get_sessionid(current) :
(unsigned int) -1;
audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
audit_log_task_context(audit_buf);
}
void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
bool task_valid);
void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
struct sk_buff *skb);
void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
__be32 net_seq);
void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
__be32 net_seq);
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,
bool task_valid)
{
}
static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
bool task_valid)
{
}
static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
bool task_valid)
{
}
static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
bool task_valid)
{
}
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
static inline void xfrm_pol_hold(struct xfrm_policy *policy)
{
if (likely(policy != NULL))
atomic_inc(&policy->refcnt);
}
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]);
}
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;
pbi = prefixlen & 0x1f;
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)
{
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;
}
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;
}
return port;
}
bool xfrm_selector_match(const struct xfrm_selector *sel,
const struct flowi *fl, unsigned short family);
#ifdef CONFIG_SECURITY_NETWORK_XFRM
static inline bool 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 bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
{
return true;
}
#endif
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
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;
}
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);
}
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_equal((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
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);
}
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);
}
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);
}
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;
}
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;
}
}
void xfrm_garbage_collect(struct net *net);
#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;
}
static inline void xfrm_garbage_collect(struct net *net)
{
}
#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_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
(ipv6_addr_equal((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)));
}
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;
u8 pfkey_supported: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;
};
struct xfrm4_protocol {
int (*handler)(struct sk_buff *skb);
int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
int encap_type);
int (*cb_handler)(struct sk_buff *skb, int err);
int (*err_handler)(struct sk_buff *skb, u32 info);
struct xfrm4_protocol __rcu *next;
int priority;
};
struct xfrm6_protocol {
int (*handler)(struct sk_buff *skb);
int (*cb_handler)(struct sk_buff *skb, int err);
int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
u8 type, u8 code, int offset, __be32 info);
struct xfrm6_protocol __rcu *next;
int priority;
};
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;
};
void xfrm_init(void);
void xfrm4_init(void);
int xfrm_state_init(struct net *net);
void xfrm_state_fini(struct net *net);
void xfrm4_state_init(void);
void xfrm4_protocol_init(void);
#ifdef CONFIG_XFRM
int xfrm6_init(void);
void xfrm6_fini(void);
int xfrm6_state_init(void);
void xfrm6_state_fini(void);
int xfrm6_protocol_init(void);
void xfrm6_protocol_fini(void);
#else
static inline int xfrm6_init(void)
{
return 0;
}
static inline void xfrm6_fini(void)
{
;
}
#endif
#ifdef CONFIG_XFRM_STATISTICS
int xfrm_proc_init(struct net *net);
void xfrm_proc_fini(struct net *net);
#endif
int xfrm_sysctl_init(struct net *net);
#ifdef CONFIG_SYSCTL
void xfrm_sysctl_fini(struct net *net);
#else
static inline void xfrm_sysctl_fini(struct net *net)
{
}
#endif
void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
struct xfrm_address_filter *filter);
int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
int (*func)(struct xfrm_state *, int, void*), void *);
void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
struct xfrm_state *xfrm_state_alloc(struct net *net);
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);
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);
struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
unsigned short family);
int xfrm_state_check_expire(struct xfrm_state *x);
void xfrm_state_insert(struct xfrm_state *x);
int xfrm_state_add(struct xfrm_state *x);
int xfrm_state_update(struct xfrm_state *x);
struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
const xfrm_address_t *daddr, __be32 spi,
u8 proto, unsigned short family);
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
int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
unsigned short family, struct net *net);
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, struct net *net)
{
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;
u32 sadhmcnt;
u32 sadcnt;
};
struct xfrmk_spdinfo {
u32 incnt;
u32 outcnt;
u32 fwdcnt;
u32 inscnt;
u32 outscnt;
u32 fwdscnt;
u32 spdhcnt;
u32 spdhmcnt;
};
struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
int xfrm_state_delete(struct xfrm_state *x);
int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
int xfrm_init_replay(struct xfrm_state *x);
int xfrm_state_mtu(struct xfrm_state *x, int mtu);
int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
int xfrm_init_state(struct xfrm_state *x);
int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
int xfrm_output_resume(struct sk_buff *skb, int err);
int xfrm_output(struct sk_buff *skb);
int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
void xfrm_local_error(struct sk_buff *skb, int mtu);
int xfrm4_extract_header(struct sk_buff *skb);
int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
int encap_type);
int xfrm4_transport_finish(struct sk_buff *skb, int async);
int xfrm4_rcv(struct sk_buff *skb);
static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
{
XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
XFRM_SPI_SKB_CB(skb)->family = AF_INET;
XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
return xfrm_input(skb, nexthdr, spi, 0);
}
int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm4_output(struct sock *sk, struct sk_buff *skb);
int xfrm4_output_finish(struct sk_buff *skb);
int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
int xfrm6_extract_header(struct sk_buff *skb);
int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
int xfrm6_transport_finish(struct sk_buff *skb, int async);
int xfrm6_rcv(struct sk_buff *skb);
int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
xfrm_address_t *saddr, u8 proto);
void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm6_output(struct sock *sk, struct sk_buff *skb);
int xfrm6_output_finish(struct sk_buff *skb);
int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
u8 **prevhdr);
#ifdef CONFIG_XFRM
int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
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)
{
kfree_skb(skb);
return 0;
}
#endif
struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
int (*func)(struct xfrm_policy *, int, int, void*),
void *);
void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
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, bool task_valid);
void xfrm_policy_hash_rebuild(struct net *net);
u32 xfrm_get_acqseq(void);
int verify_spi_info(u8 proto, u32 min, u32 max);
int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
struct xfrm_state *xfrm_find_acq(struct net *net, const 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);
int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
#ifdef CONFIG_XFRM_MIGRATE
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);
struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
struct xfrm_migrate *m);
int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
struct xfrm_migrate *m, int num_bundles,
struct xfrm_kmaddress *k, struct net *net);
#endif
int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
xfrm_address_t *addr);
void xfrm_input_init(void);
int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
void xfrm_probe_algs(void);
int xfrm_count_pfkey_auth_supported(void);
int xfrm_count_pfkey_enc_supported(void);
struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
int probe);
static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
const xfrm_address_t *b)
{
return ipv6_addr_equal((const struct in6_addr *)a,
(const struct in6_addr *)b);
}
static inline bool xfrm_addr_equal(const xfrm_address_t *a,
const xfrm_address_t *b,
sa_family_t family)
{
switch (family) {
default:
case AF_INET:
return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
case AF_INET6:
return xfrm6_addr_equal(a, 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;
}
static inline int xfrm_acquire_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_ACQUIRE);
rcu_read_unlock();
return ret;
}
#endif
static inline int aead_len(struct xfrm_algo_aead *alg)
{
return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
}
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_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
{
return kmemdup(orig, aead_len(orig), GFP_KERNEL);
}
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)
{
int ret = 0;
if (m->m | m->v)
ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
return ret;
}
static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
unsigned int family)
{
bool tunnel = false;
switch(family) {
case AF_INET:
if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
tunnel = true;
break;
case AF_INET6:
if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
tunnel = true;
break;
}
if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
return -EINVAL;
return 0;
}
#endif