mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-30 07:34:12 +08:00
b1e3a56070
When xfrm interfaces are used in combination with namespaces
and ESP offload, we get a dst_entry NULL pointer dereference.
This is because we don't have a dst_entry attached in the ESP
offloading case and we need to do a policy lookup before the
namespace transition.
Fix this by expicit checking of skb_dst(skb) before accessing it.
Fixes: f203b76d78 ("xfrm: Add virtual xfrm interfaces")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2048 lines
54 KiB
C
2048 lines
54 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _NET_XFRM_H
|
|
#define _NET_XFRM_H
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/xfrm.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/list.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/pfkeyv2.h>
|
|
#include <linux/ipsec.h>
|
|
#include <linux/in6.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/audit.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/refcount.h>
|
|
#include <linux/sockptr.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 <net/gro_cells.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))
|
|
#define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
|
|
MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
|
|
|
|
#ifdef CONFIG_XFRM_STATISTICS
|
|
#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
|
|
#else
|
|
#define XFRM_INC_STATS(net, field) ((void)(net))
|
|
#endif
|
|
|
|
|
|
/* 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;
|
|
u8 dying;
|
|
u8 proto;
|
|
u32 seq;
|
|
struct xfrm_address_filter *filter;
|
|
};
|
|
|
|
struct xfrm_state_offload {
|
|
struct net_device *dev;
|
|
struct net_device *real_dev;
|
|
unsigned long offload_handle;
|
|
unsigned int num_exthdrs;
|
|
u8 flags;
|
|
};
|
|
|
|
struct xfrm_mode {
|
|
u8 encap;
|
|
u8 family;
|
|
u8 flags;
|
|
};
|
|
|
|
/* Flags for xfrm_mode. */
|
|
enum {
|
|
XFRM_MODE_FLAG_TUNNEL = 1,
|
|
};
|
|
|
|
/* Full description of state of transformer. */
|
|
struct xfrm_state {
|
|
possible_net_t xs_net;
|
|
union {
|
|
struct hlist_node gclist;
|
|
struct hlist_node bydst;
|
|
};
|
|
struct hlist_node bysrc;
|
|
struct hlist_node byspi;
|
|
|
|
refcount_t refcnt;
|
|
spinlock_t lock;
|
|
|
|
struct xfrm_id id;
|
|
struct xfrm_selector sel;
|
|
struct xfrm_mark mark;
|
|
u32 if_id;
|
|
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;
|
|
u32 extra_flags;
|
|
struct xfrm_mark smark;
|
|
} 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;
|
|
const char *geniv;
|
|
|
|
/* Data for encapsulator */
|
|
struct xfrm_encap_tmpl *encap;
|
|
struct sock __rcu *encap_sk;
|
|
|
|
/* Data for care-of address */
|
|
xfrm_address_t *coaddr;
|
|
|
|
/* IPComp needs an IPIP tunnel for handling uncompressed packets */
|
|
struct xfrm_state *tunnel;
|
|
|
|
/* If a tunnel, number of users + 1 */
|
|
atomic_t tunnel_users;
|
|
|
|
/* State for replay detection */
|
|
struct xfrm_replay_state replay;
|
|
struct xfrm_replay_state_esn *replay_esn;
|
|
|
|
/* Replay detection state at the time we sent the last notification */
|
|
struct xfrm_replay_state preplay;
|
|
struct xfrm_replay_state_esn *preplay_esn;
|
|
|
|
/* The functions for replay detection. */
|
|
const struct xfrm_replay *repl;
|
|
|
|
/* internal flag that only holds state for delayed aevent at the
|
|
* moment
|
|
*/
|
|
u32 xflags;
|
|
|
|
/* Replay detection notification settings */
|
|
u32 replay_maxage;
|
|
u32 replay_maxdiff;
|
|
|
|
/* Replay detection notification timer */
|
|
struct timer_list rtimer;
|
|
|
|
/* Statistics */
|
|
struct xfrm_stats stats;
|
|
|
|
struct xfrm_lifetime_cur curlft;
|
|
struct hrtimer mtimer;
|
|
|
|
struct xfrm_state_offload xso;
|
|
|
|
/* used to fix curlft->add_time when changing date */
|
|
long saved_tmo;
|
|
|
|
/* Last used time */
|
|
time64_t lastused;
|
|
|
|
struct page_frag xfrag;
|
|
|
|
/* 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;
|
|
|
|
const struct xfrm_type_offload *type_offload;
|
|
|
|
/* 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
|
|
#define XFRM_SOFT_EXPIRE 2
|
|
|
|
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 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 xfrm_if_cb {
|
|
struct xfrm_if *(*decode_session)(struct sk_buff *skb,
|
|
unsigned short family);
|
|
};
|
|
|
|
void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
|
|
void xfrm_if_unregister_cb(void);
|
|
|
|
struct net_device;
|
|
struct xfrm_type;
|
|
struct xfrm_dst;
|
|
struct xfrm_policy_afinfo {
|
|
struct dst_ops *dst_ops;
|
|
struct dst_entry *(*dst_lookup)(struct net *net,
|
|
int tos, int oif,
|
|
const xfrm_address_t *saddr,
|
|
const xfrm_address_t *daddr,
|
|
u32 mark);
|
|
int (*get_saddr)(struct net *net, int oif,
|
|
xfrm_address_t *saddr,
|
|
xfrm_address_t *daddr,
|
|
u32 mark);
|
|
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(const struct xfrm_policy_afinfo *afinfo, int family);
|
|
void xfrm_policy_unregister_afinfo(const 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 {
|
|
u8 family;
|
|
u8 proto;
|
|
|
|
const struct xfrm_type_offload *type_offload_esp;
|
|
|
|
const struct xfrm_type *type_esp;
|
|
const struct xfrm_type *type_ipip;
|
|
const struct xfrm_type *type_ipip6;
|
|
const struct xfrm_type *type_comp;
|
|
const struct xfrm_type *type_ah;
|
|
const struct xfrm_type *type_routing;
|
|
const struct xfrm_type *type_dstopts;
|
|
|
|
int (*output)(struct net *net, struct sock *sk, 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);
|
|
struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
|
|
|
|
struct xfrm_input_afinfo {
|
|
u8 family;
|
|
bool is_ipip;
|
|
int (*callback)(struct sk_buff *skb, u8 protocol,
|
|
int err);
|
|
};
|
|
|
|
int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
|
|
int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
|
|
|
|
void xfrm_flush_gc(void);
|
|
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 **);
|
|
};
|
|
|
|
int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
|
|
void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
|
|
|
|
struct xfrm_type_offload {
|
|
char *description;
|
|
struct module *owner;
|
|
u8 proto;
|
|
void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
|
|
int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
|
|
int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
|
|
};
|
|
|
|
int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
|
|
void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short 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 const 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
|
|
#define XFRM_MAX_OFFLOAD_DEPTH 1
|
|
|
|
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 {
|
|
possible_net_t xp_net;
|
|
struct hlist_node bydst;
|
|
struct hlist_node byidx;
|
|
|
|
/* This lock only affects elements except for entry. */
|
|
rwlock_t lock;
|
|
refcount_t refcnt;
|
|
u32 pos;
|
|
struct timer_list timer;
|
|
|
|
atomic_t genid;
|
|
u32 priority;
|
|
u32 index;
|
|
u32 if_id;
|
|
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;
|
|
bool bydst_reinsert;
|
|
u8 type;
|
|
u8 action;
|
|
u8 flags;
|
|
u8 xfrm_nr;
|
|
u16 family;
|
|
struct xfrm_sec_ctx *security;
|
|
struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
|
|
struct hlist_node bydst_inexact_list;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
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
|
|
/* 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;
|
|
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,
|
|
const struct xfrm_encap_tmpl *encap);
|
|
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]))
|
|
|
|
/*
|
|
* 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 {
|
|
struct xfrm_tunnel_skb_cb header;
|
|
|
|
/* Sequence number for replay protection. */
|
|
union {
|
|
struct {
|
|
__u32 low;
|
|
__u32 hi;
|
|
} output;
|
|
struct {
|
|
__be32 low;
|
|
__be32 hi;
|
|
} input;
|
|
} seq;
|
|
};
|
|
|
|
#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
|
|
|
|
/*
|
|
* This structure is used by the afinfo prepare_input/prepare_output functions
|
|
* to transmit header information to the mode input/output functions.
|
|
*/
|
|
struct xfrm_mode_skb_cb {
|
|
struct xfrm_tunnel_skb_cb 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 {
|
|
struct xfrm_tunnel_skb_cb header;
|
|
|
|
unsigned int daddroff;
|
|
unsigned int family;
|
|
__be32 seq;
|
|
};
|
|
|
|
#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 == AUDIT_OFF)
|
|
return NULL;
|
|
audit_buf = audit_log_start(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) :
|
|
AUDIT_SID_UNSET;
|
|
|
|
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 /* CONFIG_AUDITSYSCALL */
|
|
|
|
static inline void xfrm_pol_hold(struct xfrm_policy *policy)
|
|
{
|
|
if (likely(policy != NULL))
|
|
refcount_inc(&policy->refcnt);
|
|
}
|
|
|
|
void xfrm_policy_destroy(struct xfrm_policy *policy);
|
|
|
|
static inline void xfrm_pol_put(struct xfrm_policy *policy)
|
|
{
|
|
if (refcount_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 *, bool);
|
|
|
|
static inline void __xfrm_state_put(struct xfrm_state *x)
|
|
{
|
|
refcount_dec(&x->refcnt);
|
|
}
|
|
|
|
static inline void xfrm_state_put(struct xfrm_state *x)
|
|
{
|
|
if (refcount_dec_and_test(&x->refcnt))
|
|
__xfrm_state_destroy(x, false);
|
|
}
|
|
|
|
static inline void xfrm_state_put_sync(struct xfrm_state *x)
|
|
{
|
|
if (refcount_dec_and_test(&x->refcnt))
|
|
__xfrm_state_destroy(x, true);
|
|
}
|
|
|
|
static inline void xfrm_state_hold(struct xfrm_state *x)
|
|
{
|
|
refcount_inc(&x->refcnt);
|
|
}
|
|
|
|
static inline bool addr_match(const void *token1, const void *token2,
|
|
unsigned int prefixlen)
|
|
{
|
|
const __be32 *a1 = token1;
|
|
const __be32 *a2 = token2;
|
|
unsigned int pdw;
|
|
unsigned int pbi;
|
|
|
|
pdw = prefixlen >> 5; /* num of whole u32 in prefix */
|
|
pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
|
|
|
|
if (pdw)
|
|
if (memcmp(a1, a2, pdw << 2))
|
|
return false;
|
|
|
|
if (pbi) {
|
|
__be32 mask;
|
|
|
|
mask = htonl((0xffffffff) << (32 - pbi));
|
|
|
|
if ((a1[pdw] ^ a2[pdw]) & mask)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
|
|
{
|
|
/* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
|
|
if (sizeof(long) == 4 && prefixlen == 0)
|
|
return true;
|
|
return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
|
|
}
|
|
|
|
static __inline__
|
|
__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
|
|
{
|
|
__be16 port;
|
|
switch(fl->flowi_proto) {
|
|
case IPPROTO_TCP:
|
|
case IPPROTO_UDP:
|
|
case IPPROTO_UDPLITE:
|
|
case IPPROTO_SCTP:
|
|
port = uli->ports.sport;
|
|
break;
|
|
case IPPROTO_ICMP:
|
|
case IPPROTO_ICMPV6:
|
|
port = htons(uli->icmpt.type);
|
|
break;
|
|
case IPPROTO_MH:
|
|
port = htons(uli->mht.type);
|
|
break;
|
|
case IPPROTO_GRE:
|
|
port = htons(ntohl(uli->gre_key) >> 16);
|
|
break;
|
|
default:
|
|
port = 0; /*XXX*/
|
|
}
|
|
return port;
|
|
}
|
|
|
|
static __inline__
|
|
__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
|
|
{
|
|
__be16 port;
|
|
switch(fl->flowi_proto) {
|
|
case IPPROTO_TCP:
|
|
case IPPROTO_UDP:
|
|
case IPPROTO_UDPLITE:
|
|
case IPPROTO_SCTP:
|
|
port = uli->ports.dport;
|
|
break;
|
|
case IPPROTO_ICMP:
|
|
case IPPROTO_ICMPV6:
|
|
port = htons(uli->icmpt.code);
|
|
break;
|
|
case IPPROTO_GRE:
|
|
port = htons(ntohl(uli->gre_key) & 0xffff);
|
|
break;
|
|
default:
|
|
port = 0; /*XXX*/
|
|
}
|
|
return port;
|
|
}
|
|
|
|
bool xfrm_selector_match(const struct xfrm_selector *sel,
|
|
const struct flowi *fl, unsigned short family);
|
|
|
|
#ifdef CONFIG_SECURITY_NETWORK_XFRM
|
|
/* If neither has a context --> match
|
|
* Otherwise, both must have a context and the sids, doi, alg must match
|
|
*/
|
|
static inline 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
|
|
|
|
/* A struct encoding bundle of transformations to apply to some set of flow.
|
|
*
|
|
* xdst->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 dst_entry *child;
|
|
struct dst_entry *path;
|
|
struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
|
|
int num_pols, num_xfrms;
|
|
u32 xfrm_genid;
|
|
u32 policy_genid;
|
|
u32 route_mtu_cached;
|
|
u32 child_mtu_cached;
|
|
u32 route_cookie;
|
|
u32 path_cookie;
|
|
};
|
|
|
|
static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
|
|
{
|
|
#ifdef CONFIG_XFRM
|
|
if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
|
|
const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
|
|
|
|
return xdst->path;
|
|
}
|
|
#endif
|
|
return (struct dst_entry *) dst;
|
|
}
|
|
|
|
static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
|
|
{
|
|
#ifdef CONFIG_XFRM
|
|
if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
|
|
struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
|
|
return xdst->child;
|
|
}
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef CONFIG_XFRM
|
|
static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
|
|
{
|
|
xdst->child = child;
|
|
}
|
|
|
|
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);
|
|
}
|
|
#endif
|
|
|
|
void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
|
|
|
|
struct xfrm_if_parms {
|
|
int link; /* ifindex of underlying L2 interface */
|
|
u32 if_id; /* interface identifyer */
|
|
};
|
|
|
|
struct xfrm_if {
|
|
struct xfrm_if __rcu *next; /* next interface in list */
|
|
struct net_device *dev; /* virtual device associated with interface */
|
|
struct net *net; /* netns for packet i/o */
|
|
struct xfrm_if_parms p; /* interface parms */
|
|
|
|
struct gro_cells gro_cells;
|
|
};
|
|
|
|
struct xfrm_offload {
|
|
/* Output sequence number for replay protection on offloading. */
|
|
struct {
|
|
__u32 low;
|
|
__u32 hi;
|
|
} seq;
|
|
|
|
__u32 flags;
|
|
#define SA_DELETE_REQ 1
|
|
#define CRYPTO_DONE 2
|
|
#define CRYPTO_NEXT_DONE 4
|
|
#define CRYPTO_FALLBACK 8
|
|
#define XFRM_GSO_SEGMENT 16
|
|
#define XFRM_GRO 32
|
|
#define XFRM_ESP_NO_TRAILER 64
|
|
#define XFRM_DEV_RESUME 128
|
|
#define XFRM_XMIT 256
|
|
|
|
__u32 status;
|
|
#define CRYPTO_SUCCESS 1
|
|
#define CRYPTO_GENERIC_ERROR 2
|
|
#define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
|
|
#define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
|
|
#define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
|
|
#define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
|
|
#define CRYPTO_INVALID_PACKET_SYNTAX 64
|
|
#define CRYPTO_INVALID_PROTOCOL 128
|
|
|
|
__u8 proto;
|
|
};
|
|
|
|
struct sec_path {
|
|
int len;
|
|
int olen;
|
|
|
|
struct xfrm_state *xvec[XFRM_MAX_DEPTH];
|
|
struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
|
|
};
|
|
|
|
struct sec_path *secpath_set(struct sk_buff *skb);
|
|
|
|
static inline void
|
|
secpath_reset(struct sk_buff *skb)
|
|
{
|
|
#ifdef CONFIG_XFRM
|
|
skb_ext_del(skb, SKB_EXT_SEC_PATH);
|
|
#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(&addr->in6);
|
|
}
|
|
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] && !secpath_exists(skb)) ||
|
|
(skb_dst(skb) && (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, const struct sock *osk);
|
|
|
|
static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
|
|
{
|
|
sk->sk_policy[0] = NULL;
|
|
sk->sk_policy[1] = NULL;
|
|
if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
|
|
return __xfrm_sk_clone_policy(sk, osk);
|
|
return 0;
|
|
}
|
|
|
|
int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
|
|
|
|
static inline void xfrm_sk_free_policy(struct sock *sk)
|
|
{
|
|
struct xfrm_policy *pol;
|
|
|
|
pol = rcu_dereference_protected(sk->sk_policy[0], 1);
|
|
if (unlikely(pol != NULL)) {
|
|
xfrm_policy_delete(pol, XFRM_POLICY_MAX);
|
|
sk->sk_policy[0] = NULL;
|
|
}
|
|
pol = rcu_dereference_protected(sk->sk_policy[1], 1);
|
|
if (unlikely(pol != NULL)) {
|
|
xfrm_policy_delete(pol, 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, const struct sock *osk) { return 0; }
|
|
static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
|
|
static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
|
|
static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
|
|
{
|
|
return 1;
|
|
}
|
|
static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
|
|
{
|
|
return 1;
|
|
}
|
|
static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
|
|
{
|
|
return 1;
|
|
}
|
|
static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
|
|
struct flowi *fl,
|
|
unsigned int family)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
|
|
struct sk_buff *skb)
|
|
{
|
|
return 1;
|
|
}
|
|
static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
|
|
struct sk_buff *skb)
|
|
{
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
static __inline__
|
|
xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
|
|
{
|
|
switch (family){
|
|
case AF_INET:
|
|
return (xfrm_address_t *)&fl->u.ip4.daddr;
|
|
case AF_INET6:
|
|
return (xfrm_address_t *)&fl->u.ip6.daddr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static __inline__
|
|
xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
|
|
{
|
|
switch (family){
|
|
case AF_INET:
|
|
return (xfrm_address_t *)&fl->u.ip4.saddr;
|
|
case AF_INET6:
|
|
return (xfrm_address_t *)&fl->u.ip6.saddr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static __inline__
|
|
void xfrm_flowi_addr_get(const struct flowi *fl,
|
|
xfrm_address_t *saddr, xfrm_address_t *daddr,
|
|
unsigned short family)
|
|
{
|
|
switch(family) {
|
|
case AF_INET:
|
|
memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
|
|
memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
|
|
break;
|
|
case AF_INET6:
|
|
saddr->in6 = fl->u.ip6.saddr;
|
|
daddr->in6 = 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 bool xfrm_id_proto_valid(u8 proto)
|
|
{
|
|
switch (proto) {
|
|
case IPPROTO_AH:
|
|
case IPPROTO_ESP:
|
|
case IPPROTO_COMP:
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case IPPROTO_ROUTING:
|
|
case IPPROTO_DSTOPTS:
|
|
#endif
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
|
|
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 {
|
|
char *geniv;
|
|
u16 icv_truncbits;
|
|
};
|
|
|
|
struct xfrm_algo_auth_info {
|
|
u16 icv_truncbits;
|
|
u16 icv_fullbits;
|
|
};
|
|
|
|
struct xfrm_algo_encr_info {
|
|
char *geniv;
|
|
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;
|
|
};
|
|
|
|
/* XFRM protocol handlers. */
|
|
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 (*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, struct inet6_skb_parm *opt,
|
|
u8 type, u8 code, int offset, __be32 info);
|
|
|
|
struct xfrm6_protocol __rcu *next;
|
|
int priority;
|
|
};
|
|
|
|
/* XFRM tunnel handlers. */
|
|
struct xfrm_tunnel {
|
|
int (*handler)(struct sk_buff *skb);
|
|
int (*cb_handler)(struct sk_buff *skb, int err);
|
|
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 (*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_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);
|
|
void xfrm_state_free(struct xfrm_state *x);
|
|
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, u32 if_id);
|
|
struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
|
|
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
|
|
void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
|
|
unsigned short family);
|
|
void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
|
|
unsigned short family);
|
|
#else
|
|
static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
|
|
int n, unsigned short family)
|
|
{
|
|
}
|
|
|
|
static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
|
|
int n, unsigned short family)
|
|
{
|
|
}
|
|
#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;
|
|
};
|
|
|
|
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, bool sync);
|
|
int xfrm_dev_state_flush(struct net *net, struct net_device *dev, 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);
|
|
u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
|
|
int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
|
|
int xfrm_init_state(struct xfrm_state *x);
|
|
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_trans_queue_net(struct net *net, struct sk_buff *skb,
|
|
int (*finish)(struct net *, struct sock *,
|
|
struct sk_buff *));
|
|
int xfrm_trans_queue(struct sk_buff *skb,
|
|
int (*finish)(struct net *, struct sock *,
|
|
struct sk_buff *));
|
|
int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err);
|
|
int xfrm_output(struct sock *sk, struct sk_buff *skb);
|
|
|
|
#if IS_ENABLED(CONFIG_NET_PKTGEN)
|
|
int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
|
|
#endif
|
|
|
|
void xfrm_local_error(struct sk_buff *skb, int mtu);
|
|
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);
|
|
int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
|
|
|
|
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_output(struct net *net, struct sock *sk, struct sk_buff *skb);
|
|
int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
|
|
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_input(struct xfrm_state *x, struct sk_buff *skb);
|
|
int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
|
|
struct ip6_tnl *t);
|
|
int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
|
|
int encap_type);
|
|
int xfrm6_transport_finish(struct sk_buff *skb, int async);
|
|
int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
|
|
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_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_output(struct net *net, struct sock *sk, struct sk_buff *skb);
|
|
int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
|
|
int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
|
|
u8 **prevhdr);
|
|
|
|
#ifdef CONFIG_XFRM
|
|
void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu);
|
|
int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
|
|
int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
|
|
int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval,
|
|
int optlen);
|
|
#else
|
|
static inline int xfrm_user_policy(struct sock *sk, int optname,
|
|
sockptr_t optval, int optlen)
|
|
{
|
|
return -ENOPROTOOPT;
|
|
}
|
|
#endif
|
|
|
|
struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
|
|
const xfrm_address_t *saddr,
|
|
const xfrm_address_t *daddr,
|
|
int family, u32 mark);
|
|
|
|
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,
|
|
const struct xfrm_mark *mark,
|
|
u32 if_id, 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,
|
|
const struct xfrm_mark *mark, u32 if_id,
|
|
u8 type, 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, u32 if_id, 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,
|
|
const struct xfrm_encap_tmpl *encap);
|
|
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,
|
|
struct xfrm_encap_tmpl *encap);
|
|
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,
|
|
struct xfrm_encap_tmpl *encap);
|
|
#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 unsigned int aead_len(struct xfrm_algo_aead *alg)
|
|
{
|
|
return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
|
|
}
|
|
|
|
static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
|
|
{
|
|
return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
|
|
}
|
|
|
|
static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
|
|
{
|
|
return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
|
|
}
|
|
|
|
static inline unsigned 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 = kmemdup(orig->replay_esn,
|
|
xfrm_replay_state_esn_len(orig->replay_esn),
|
|
GFP_KERNEL);
|
|
if (!x->replay_esn)
|
|
return -ENOMEM;
|
|
x->preplay_esn = kmemdup(orig->preplay_esn,
|
|
xfrm_replay_state_esn_len(orig->preplay_esn),
|
|
GFP_KERNEL);
|
|
if (!x->preplay_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)
|
|
{
|
|
struct sec_path *sp = skb_sec_path(skb);
|
|
|
|
return sp->xvec[sp->len - 1];
|
|
}
|
|
#endif
|
|
|
|
static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
|
|
{
|
|
#ifdef CONFIG_XFRM
|
|
struct sec_path *sp = skb_sec_path(skb);
|
|
|
|
if (!sp || !sp->olen || sp->len != sp->olen)
|
|
return NULL;
|
|
|
|
return &sp->ovec[sp->olen - 1];
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
void __init xfrm_dev_init(void);
|
|
|
|
#ifdef CONFIG_XFRM_OFFLOAD
|
|
void xfrm_dev_resume(struct sk_buff *skb);
|
|
void xfrm_dev_backlog(struct softnet_data *sd);
|
|
struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
|
|
int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
|
|
struct xfrm_user_offload *xuo);
|
|
bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
|
|
|
|
static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
|
|
{
|
|
struct xfrm_state_offload *xso = &x->xso;
|
|
|
|
if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
|
|
xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
|
|
}
|
|
|
|
static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
|
|
{
|
|
struct xfrm_state *x = dst->xfrm;
|
|
struct xfrm_dst *xdst;
|
|
|
|
if (!x || !x->type_offload)
|
|
return false;
|
|
|
|
xdst = (struct xfrm_dst *) dst;
|
|
if (!x->xso.offload_handle && !xdst->child->xfrm)
|
|
return true;
|
|
if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
|
|
!xdst->child->xfrm)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static inline void xfrm_dev_state_delete(struct xfrm_state *x)
|
|
{
|
|
struct xfrm_state_offload *xso = &x->xso;
|
|
|
|
if (xso->dev)
|
|
xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
|
|
}
|
|
|
|
static inline void xfrm_dev_state_free(struct xfrm_state *x)
|
|
{
|
|
struct xfrm_state_offload *xso = &x->xso;
|
|
struct net_device *dev = xso->dev;
|
|
|
|
if (dev && dev->xfrmdev_ops) {
|
|
if (dev->xfrmdev_ops->xdo_dev_state_free)
|
|
dev->xfrmdev_ops->xdo_dev_state_free(x);
|
|
xso->dev = NULL;
|
|
dev_put(dev);
|
|
}
|
|
}
|
|
#else
|
|
static inline void xfrm_dev_resume(struct sk_buff *skb)
|
|
{
|
|
}
|
|
|
|
static inline void xfrm_dev_backlog(struct softnet_data *sd)
|
|
{
|
|
}
|
|
|
|
static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
|
|
{
|
|
return skb;
|
|
}
|
|
|
|
static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void xfrm_dev_state_delete(struct xfrm_state *x)
|
|
{
|
|
}
|
|
|
|
static inline void xfrm_dev_state_free(struct xfrm_state *x)
|
|
{
|
|
}
|
|
|
|
static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
|
|
{
|
|
}
|
|
|
|
static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
|
|
{
|
|
return false;
|
|
}
|
|
#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 __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
|
|
{
|
|
struct xfrm_mark *m = &x->props.smark;
|
|
|
|
return (m->v & m->m) | (mark & ~m->m);
|
|
}
|
|
|
|
static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (if_id)
|
|
ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
|
|
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;
|
|
}
|
|
|
|
extern const int xfrm_msg_min[XFRM_NR_MSGTYPES];
|
|
extern const struct nla_policy xfrma_policy[XFRMA_MAX+1];
|
|
|
|
struct xfrm_translator {
|
|
/* Allocate frag_list and put compat translation there */
|
|
int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src);
|
|
|
|
/* Allocate nlmsg with 64-bit translaton of received 32-bit message */
|
|
struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh,
|
|
int maxtype, const struct nla_policy *policy,
|
|
struct netlink_ext_ack *extack);
|
|
|
|
/* Translate 32-bit user_policy from sockptr */
|
|
int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen);
|
|
|
|
struct module *owner;
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
|
|
extern int xfrm_register_translator(struct xfrm_translator *xtr);
|
|
extern int xfrm_unregister_translator(struct xfrm_translator *xtr);
|
|
extern struct xfrm_translator *xfrm_get_translator(void);
|
|
extern void xfrm_put_translator(struct xfrm_translator *xtr);
|
|
#else
|
|
static inline struct xfrm_translator *xfrm_get_translator(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void xfrm_put_translator(struct xfrm_translator *xtr)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static inline bool xfrm6_local_dontfrag(const struct sock *sk)
|
|
{
|
|
int proto;
|
|
|
|
if (!sk || sk->sk_family != AF_INET6)
|
|
return false;
|
|
|
|
proto = sk->sk_protocol;
|
|
if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
|
|
return inet6_sk(sk)->dontfrag;
|
|
|
|
return false;
|
|
}
|
|
#endif
|
|
#endif /* _NET_XFRM_H */
|