mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 21:21:47 +00:00
1618 lines
44 KiB
C
1618 lines
44 KiB
C
#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;
|
|
|
|
/* 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 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 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,
|
|
xfrm_address_t *saddr,
|
|
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);
|
|
};
|
|
|
|
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;
|
|
__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, 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 *,
|
|
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(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, 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)(struct net *net, 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, 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 {
|
|
u64 output;
|
|
__be32 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_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_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__
|
|
__be16 xfrm_flowi_sport(const 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;
|
|
case IPPROTO_GRE:
|
|
port = htons(ntohl(fl->fl_gre_key) >> 16);
|
|
break;
|
|
default:
|
|
port = 0; /*XXX*/
|
|
}
|
|
return port;
|
|
}
|
|
|
|
static __inline__
|
|
__be16 xfrm_flowi_dport(const 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;
|
|
case IPPROTO_GRE:
|
|
port = htons(ntohl(fl->fl_gre_key) & 0xffff);
|
|
break;
|
|
default:
|
|
port = 0; /*XXX*/
|
|
}
|
|
return port;
|
|
}
|
|
|
|
extern int xfrm_selector_match(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 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_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->fl4_dst;
|
|
case AF_INET6:
|
|
return (xfrm_address_t *)&fl->fl6_dst;
|
|
}
|
|
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->fl4_src;
|
|
case AF_INET6:
|
|
return (xfrm_address_t *)&fl->fl6_src;
|
|
}
|
|
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->fl4_src, sizeof(saddr->a4));
|
|
memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4));
|
|
break;
|
|
case AF_INET6:
|
|
ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src);
|
|
ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst);
|
|
break;
|
|
}
|
|
}
|
|
|
|
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, const 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_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(xfrm_address_t *daddr,
|
|
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,
|
|
xfrm_address_t *daddr, __be32 spi,
|
|
u8 proto, unsigned short family);
|
|
extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
|
|
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(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 int xfrm_replay_check(struct xfrm_state *x,
|
|
struct sk_buff *skb, __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_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_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, 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(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,
|
|
xfrm_address_t *daddr,
|
|
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(struct xfrm_selector *sel, u8 dir, u8 type,
|
|
struct xfrm_migrate *m, int num_bundles,
|
|
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(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(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);
|
|
extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len,
|
|
int probe);
|
|
|
|
struct hash_desc;
|
|
struct scatterlist;
|
|
typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
|
|
unsigned int);
|
|
|
|
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;
|
|
}
|
|
|
|
#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(struct xfrm_algo *alg)
|
|
{
|
|
return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
|
|
}
|
|
|
|
static inline int xfrm_alg_auth_len(struct xfrm_algo_auth *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 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, 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 */
|