1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _NET_XFRM_H
   3#define _NET_XFRM_H
   4
   5#include <linux/compiler.h>
   6#include <linux/xfrm.h>
   7#include <linux/spinlock.h>
   8#include <linux/list.h>
   9#include <linux/skbuff.h>
  10#include <linux/socket.h>
  11#include <linux/pfkeyv2.h>
  12#include <linux/ipsec.h>
  13#include <linux/in6.h>
  14#include <linux/mutex.h>
  15#include <linux/audit.h>
  16#include <linux/slab.h>
  17#include <linux/refcount.h>
 
  18
  19#include <net/sock.h>
  20#include <net/dst.h>
  21#include <net/ip.h>
  22#include <net/route.h>
  23#include <net/ipv6.h>
  24#include <net/ip6_fib.h>
  25#include <net/flow.h>
 
  26
  27#include <linux/interrupt.h>
  28
  29#ifdef CONFIG_XFRM_STATISTICS
  30#include <net/snmp.h>
  31#endif
  32
  33#define XFRM_PROTO_ESP		50
  34#define XFRM_PROTO_AH		51
  35#define XFRM_PROTO_COMP		108
  36#define XFRM_PROTO_IPIP		4
  37#define XFRM_PROTO_IPV6		41
  38#define XFRM_PROTO_ROUTING	IPPROTO_ROUTING
  39#define XFRM_PROTO_DSTOPTS	IPPROTO_DSTOPTS
  40
  41#define XFRM_ALIGN4(len)	(((len) + 3) & ~3)
  42#define XFRM_ALIGN8(len)	(((len) + 7) & ~7)
  43#define MODULE_ALIAS_XFRM_MODE(family, encap) \
  44	MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
  45#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
  46	MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
  47#define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
  48	MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
  49
  50#ifdef CONFIG_XFRM_STATISTICS
  51#define XFRM_INC_STATS(net, field)	SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
  52#else
  53#define XFRM_INC_STATS(net, field)	((void)(net))
  54#endif
  55
  56
  57/* Organization of SPD aka "XFRM rules"
  58   ------------------------------------
  59
  60   Basic objects:
  61   - policy rule, struct xfrm_policy (=SPD entry)
  62   - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
  63   - instance of a transformer, struct xfrm_state (=SA)
  64   - template to clone xfrm_state, struct xfrm_tmpl
  65
  66   SPD is plain linear list of xfrm_policy rules, ordered by priority.
  67   (To be compatible with existing pfkeyv2 implementations,
  68   many rules with priority of 0x7fffffff are allowed to exist and
  69   such rules are ordered in an unpredictable way, thanks to bsd folks.)
  70
  71   Lookup is plain linear search until the first match with selector.
  72
  73   If "action" is "block", then we prohibit the flow, otherwise:
  74   if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
  75   policy entry has list of up to XFRM_MAX_DEPTH transformations,
  76   described by templates xfrm_tmpl. Each template is resolved
  77   to a complete xfrm_state (see below) and we pack bundle of transformations
  78   to a dst_entry returned to requestor.
  79
  80   dst -. xfrm  .-> xfrm_state #1
  81    |---. child .-> dst -. xfrm .-> xfrm_state #2
  82                     |---. child .-> dst -. xfrm .-> xfrm_state #3
  83                                      |---. child .-> NULL
  84
  85   Bundles are cached at xrfm_policy struct (field ->bundles).
  86
  87
  88   Resolution of xrfm_tmpl
  89   -----------------------
  90   Template contains:
  91   1. ->mode		Mode: transport or tunnel
  92   2. ->id.proto	Protocol: AH/ESP/IPCOMP
  93   3. ->id.daddr	Remote tunnel endpoint, ignored for transport mode.
  94      Q: allow to resolve security gateway?
  95   4. ->id.spi          If not zero, static SPI.
  96   5. ->saddr		Local tunnel endpoint, ignored for transport mode.
  97   6. ->algos		List of allowed algos. Plain bitmask now.
  98      Q: ealgos, aalgos, calgos. What a mess...
  99   7. ->share		Sharing mode.
 100      Q: how to implement private sharing mode? To add struct sock* to
 101      flow id?
 102
 103   Having this template we search through SAD searching for entries
 104   with appropriate mode/proto/algo, permitted by selector.
 105   If no appropriate entry found, it is requested from key manager.
 106
 107   PROBLEMS:
 108   Q: How to find all the bundles referring to a physical path for
 109      PMTU discovery? Seems, dst should contain list of all parents...
 110      and enter to infinite locking hierarchy disaster.
 111      No! It is easier, we will not search for them, let them find us.
 112      We add genid to each dst plus pointer to genid of raw IP route,
 113      pmtu disc will update pmtu on raw IP route and increase its genid.
 114      dst_check() will see this for top level and trigger resyncing
 115      metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
 116 */
 117
 118struct xfrm_state_walk {
 119	struct list_head	all;
 120	u8			state;
 121	u8			dying;
 122	u8			proto;
 123	u32			seq;
 124	struct xfrm_address_filter *filter;
 125};
 126
 127struct xfrm_state_offload {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 128	struct net_device	*dev;
 
 
 129	unsigned long		offload_handle;
 130	unsigned int		num_exthdrs;
 131	u8			flags;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 132};
 133
 134/* Full description of state of transformer. */
 135struct xfrm_state {
 136	possible_net_t		xs_net;
 137	union {
 138		struct hlist_node	gclist;
 139		struct hlist_node	bydst;
 140	};
 141	struct hlist_node	bysrc;
 142	struct hlist_node	byspi;
 
 143
 144	refcount_t		refcnt;
 145	spinlock_t		lock;
 146
 147	struct xfrm_id		id;
 148	struct xfrm_selector	sel;
 149	struct xfrm_mark	mark;
 
 150	u32			tfcpad;
 151
 152	u32			genid;
 153
 154	/* Key manager bits */
 155	struct xfrm_state_walk	km;
 156
 157	/* Parameters of this state. */
 158	struct {
 159		u32		reqid;
 160		u8		mode;
 161		u8		replay_window;
 162		u8		aalgo, ealgo, calgo;
 163		u8		flags;
 164		u16		family;
 165		xfrm_address_t	saddr;
 166		int		header_len;
 167		int		trailer_len;
 168		u32		extra_flags;
 169		u32		output_mark;
 170	} props;
 171
 172	struct xfrm_lifetime_cfg lft;
 173
 174	/* Data for transformer */
 175	struct xfrm_algo_auth	*aalg;
 176	struct xfrm_algo	*ealg;
 177	struct xfrm_algo	*calg;
 178	struct xfrm_algo_aead	*aead;
 179	const char		*geniv;
 180
 
 
 
 
 
 181	/* Data for encapsulator */
 182	struct xfrm_encap_tmpl	*encap;
 
 183
 184	/* Data for care-of address */
 185	xfrm_address_t	*coaddr;
 186
 187	/* IPComp needs an IPIP tunnel for handling uncompressed packets */
 188	struct xfrm_state	*tunnel;
 189
 190	/* If a tunnel, number of users + 1 */
 191	atomic_t		tunnel_users;
 192
 193	/* State for replay detection */
 194	struct xfrm_replay_state replay;
 195	struct xfrm_replay_state_esn *replay_esn;
 196
 197	/* Replay detection state at the time we sent the last notification */
 198	struct xfrm_replay_state preplay;
 199	struct xfrm_replay_state_esn *preplay_esn;
 200
 201	/* The functions for replay detection. */
 202	const struct xfrm_replay *repl;
 203
 204	/* internal flag that only holds state for delayed aevent at the
 205	 * moment
 206	*/
 207	u32			xflags;
 208
 209	/* Replay detection notification settings */
 210	u32			replay_maxage;
 211	u32			replay_maxdiff;
 212
 213	/* Replay detection notification timer */
 214	struct timer_list	rtimer;
 215
 216	/* Statistics */
 217	struct xfrm_stats	stats;
 218
 219	struct xfrm_lifetime_cur curlft;
 220	struct tasklet_hrtimer	mtimer;
 221
 222	struct xfrm_state_offload xso;
 223
 224	/* used to fix curlft->add_time when changing date */
 225	long		saved_tmo;
 226
 227	/* Last used time */
 228	unsigned long		lastused;
 229
 230	struct page_frag xfrag;
 231
 232	/* Reference to data common to all the instances of this
 233	 * transformer. */
 234	const struct xfrm_type	*type;
 235	struct xfrm_mode	*inner_mode;
 236	struct xfrm_mode	*inner_mode_iaf;
 237	struct xfrm_mode	*outer_mode;
 238
 239	const struct xfrm_type_offload	*type_offload;
 240
 241	/* Security context */
 242	struct xfrm_sec_ctx	*security;
 243
 244	/* Private data of this transformer, format is opaque,
 245	 * interpreted by xfrm_type methods. */
 246	void			*data;
 247};
 248
 249static inline struct net *xs_net(struct xfrm_state *x)
 250{
 251	return read_pnet(&x->xs_net);
 252}
 253
 254/* xflags - make enum if more show up */
 255#define XFRM_TIME_DEFER	1
 256#define XFRM_SOFT_EXPIRE 2
 257
 258enum {
 259	XFRM_STATE_VOID,
 260	XFRM_STATE_ACQ,
 261	XFRM_STATE_VALID,
 262	XFRM_STATE_ERROR,
 263	XFRM_STATE_EXPIRED,
 264	XFRM_STATE_DEAD
 265};
 266
 267/* callback structure passed from either netlink or pfkey */
 268struct km_event {
 269	union {
 270		u32 hard;
 271		u32 proto;
 272		u32 byid;
 273		u32 aevent;
 274		u32 type;
 275	} data;
 276
 277	u32	seq;
 278	u32	portid;
 279	u32	event;
 280	struct net *net;
 281};
 282
 283struct xfrm_replay {
 284	void	(*advance)(struct xfrm_state *x, __be32 net_seq);
 285	int	(*check)(struct xfrm_state *x,
 286			 struct sk_buff *skb,
 287			 __be32 net_seq);
 288	int	(*recheck)(struct xfrm_state *x,
 289			   struct sk_buff *skb,
 290			   __be32 net_seq);
 291	void	(*notify)(struct xfrm_state *x, int event);
 292	int	(*overflow)(struct xfrm_state *x, struct sk_buff *skb);
 293};
 294
 
 
 
 295struct net_device;
 296struct xfrm_type;
 297struct xfrm_dst;
 298struct xfrm_policy_afinfo {
 299	struct dst_ops		*dst_ops;
 300	struct dst_entry	*(*dst_lookup)(struct net *net,
 301					       int tos, int oif,
 302					       const xfrm_address_t *saddr,
 303					       const xfrm_address_t *daddr,
 304					       u32 mark);
 305	int			(*get_saddr)(struct net *net, int oif,
 306					     xfrm_address_t *saddr,
 307					     xfrm_address_t *daddr,
 308					     u32 mark);
 309	void			(*decode_session)(struct sk_buff *skb,
 310						  struct flowi *fl,
 311						  int reverse);
 312	int			(*get_tos)(const struct flowi *fl);
 313	int			(*init_path)(struct xfrm_dst *path,
 314					     struct dst_entry *dst,
 315					     int nfheader_len);
 316	int			(*fill_dst)(struct xfrm_dst *xdst,
 317					    struct net_device *dev,
 318					    const struct flowi *fl);
 319	struct dst_entry	*(*blackhole_route)(struct net *net, struct dst_entry *orig);
 320};
 321
 322int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
 323void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
 324void km_policy_notify(struct xfrm_policy *xp, int dir,
 325		      const struct km_event *c);
 326void xfrm_policy_cache_flush(void);
 327void km_state_notify(struct xfrm_state *x, const struct km_event *c);
 328
 329struct xfrm_tmpl;
 330int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
 331	     struct xfrm_policy *pol);
 332void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
 333int __xfrm_state_delete(struct xfrm_state *x);
 334
 335struct xfrm_state_afinfo {
 336	unsigned int			family;
 337	unsigned int			proto;
 338	__be16				eth_proto;
 339	struct module			*owner;
 340	const struct xfrm_type		*type_map[IPPROTO_MAX];
 341	const struct xfrm_type_offload	*type_offload_map[IPPROTO_MAX];
 342	struct xfrm_mode		*mode_map[XFRM_MODE_MAX];
 343
 344	int			(*init_flags)(struct xfrm_state *x);
 345	void			(*init_tempsel)(struct xfrm_selector *sel,
 346						const struct flowi *fl);
 347	void			(*init_temprop)(struct xfrm_state *x,
 348						const struct xfrm_tmpl *tmpl,
 349						const xfrm_address_t *daddr,
 350						const xfrm_address_t *saddr);
 351	int			(*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
 352	int			(*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
 353	int			(*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
 354	int			(*output_finish)(struct sock *sk, struct sk_buff *skb);
 355	int			(*extract_input)(struct xfrm_state *x,
 356						 struct sk_buff *skb);
 357	int			(*extract_output)(struct xfrm_state *x,
 358						  struct sk_buff *skb);
 359	int			(*transport_finish)(struct sk_buff *skb,
 360						    int async);
 361	void			(*local_error)(struct sk_buff *skb, u32 mtu);
 362};
 363
 364int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
 365int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
 366struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
 367struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
 368
 369struct xfrm_input_afinfo {
 370	unsigned int		family;
 
 371	int			(*callback)(struct sk_buff *skb, u8 protocol,
 372					    int err);
 373};
 374
 375int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
 376int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
 377
 378void xfrm_flush_gc(void);
 379void xfrm_state_delete_tunnel(struct xfrm_state *x);
 380
 381struct xfrm_type {
 382	char			*description;
 383	struct module		*owner;
 384	u8			proto;
 385	u8			flags;
 386#define XFRM_TYPE_NON_FRAGMENT	1
 387#define XFRM_TYPE_REPLAY_PROT	2
 388#define XFRM_TYPE_LOCAL_COADDR	4
 389#define XFRM_TYPE_REMOTE_COADDR	8
 390
 391	int			(*init_state)(struct xfrm_state *x);
 
 392	void			(*destructor)(struct xfrm_state *);
 393	int			(*input)(struct xfrm_state *, struct sk_buff *skb);
 394	int			(*output)(struct xfrm_state *, struct sk_buff *pskb);
 395	int			(*reject)(struct xfrm_state *, struct sk_buff *,
 396					  const struct flowi *);
 397	int			(*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
 398	/* Estimate maximal size of result of transformation of a dgram */
 399	u32			(*get_mtu)(struct xfrm_state *, int size);
 400};
 401
 402int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
 403int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
 404
 405struct xfrm_type_offload {
 406	char		*description;
 407	struct module	*owner;
 408	u8		proto;
 409	void		(*encap)(struct xfrm_state *, struct sk_buff *pskb);
 410	int		(*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
 411	int		(*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
 412};
 413
 414int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
 415int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
 416
 417struct xfrm_mode {
 418	/*
 419	 * Remove encapsulation header.
 420	 *
 421	 * The IP header will be moved over the top of the encapsulation
 422	 * header.
 423	 *
 424	 * On entry, the transport header shall point to where the IP header
 425	 * should be and the network header shall be set to where the IP
 426	 * header currently is.  skb->data shall point to the start of the
 427	 * payload.
 428	 */
 429	int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
 430
 431	/*
 432	 * This is the actual input entry point.
 433	 *
 434	 * For transport mode and equivalent this would be identical to
 435	 * input2 (which does not need to be set).  While tunnel mode
 436	 * and equivalent would set this to the tunnel encapsulation function
 437	 * xfrm4_prepare_input that would in turn call input2.
 438	 */
 439	int (*input)(struct xfrm_state *x, struct sk_buff *skb);
 440
 441	/*
 442	 * Add encapsulation header.
 443	 *
 444	 * On exit, the transport header will be set to the start of the
 445	 * encapsulation header to be filled in by x->type->output and
 446	 * the mac header will be set to the nextheader (protocol for
 447	 * IPv4) field of the extension header directly preceding the
 448	 * encapsulation header, or in its absence, that of the top IP
 449	 * header.  The value of the network header will always point
 450	 * to the top IP header while skb->data will point to the payload.
 451	 */
 452	int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
 453
 454	/*
 455	 * This is the actual output entry point.
 456	 *
 457	 * For transport mode and equivalent this would be identical to
 458	 * output2 (which does not need to be set).  While tunnel mode
 459	 * and equivalent would set this to a tunnel encapsulation function
 460	 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
 461	 * call output2.
 462	 */
 463	int (*output)(struct xfrm_state *x, struct sk_buff *skb);
 464
 465	/*
 466	 * Adjust pointers into the packet and do GSO segmentation.
 467	 */
 468	struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features);
 469
 470	/*
 471	 * Adjust pointers into the packet when IPsec is done at layer2.
 472	 */
 473	void (*xmit)(struct xfrm_state *x, struct sk_buff *skb);
 474
 475	struct xfrm_state_afinfo *afinfo;
 476	struct module *owner;
 477	unsigned int encap;
 478	int flags;
 479};
 480
 481/* Flags for xfrm_mode. */
 482enum {
 483	XFRM_MODE_FLAG_TUNNEL = 1,
 484};
 485
 486int xfrm_register_mode(struct xfrm_mode *mode, int family);
 487int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
 488
 489static inline int xfrm_af2proto(unsigned int family)
 490{
 491	switch(family) {
 492	case AF_INET:
 493		return IPPROTO_IPIP;
 494	case AF_INET6:
 495		return IPPROTO_IPV6;
 496	default:
 497		return 0;
 498	}
 499}
 500
 501static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
 502{
 503	if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
 504	    (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
 505		return x->inner_mode;
 506	else
 507		return x->inner_mode_iaf;
 508}
 509
 510struct xfrm_tmpl {
 511/* id in template is interpreted as:
 512 * daddr - destination of tunnel, may be zero for transport mode.
 513 * spi   - zero to acquire spi. Not zero if spi is static, then
 514 *	   daddr must be fixed too.
 515 * proto - AH/ESP/IPCOMP
 516 */
 517	struct xfrm_id		id;
 518
 519/* Source address of tunnel. Ignored, if it is not a tunnel. */
 520	xfrm_address_t		saddr;
 521
 522	unsigned short		encap_family;
 523
 524	u32			reqid;
 525
 526/* Mode: transport, tunnel etc. */
 527	u8			mode;
 528
 529/* Sharing mode: unique, this session only, this user only etc. */
 530	u8			share;
 531
 532/* May skip this transfomration if no SA is found */
 533	u8			optional;
 534
 535/* Skip aalgos/ealgos/calgos checks. */
 536	u8			allalgs;
 537
 538/* Bit mask of algos allowed for acquisition */
 539	u32			aalgos;
 540	u32			ealgos;
 541	u32			calgos;
 542};
 543
 544#define XFRM_MAX_DEPTH		6
 545#define XFRM_MAX_OFFLOAD_DEPTH	1
 546
 547struct xfrm_policy_walk_entry {
 548	struct list_head	all;
 549	u8			dead;
 550};
 551
 552struct xfrm_policy_walk {
 553	struct xfrm_policy_walk_entry walk;
 554	u8 type;
 555	u32 seq;
 556};
 557
 558struct xfrm_policy_queue {
 559	struct sk_buff_head	hold_queue;
 560	struct timer_list	hold_timer;
 561	unsigned long		timeout;
 562};
 563
 564struct xfrm_policy {
 565	possible_net_t		xp_net;
 566	struct hlist_node	bydst;
 567	struct hlist_node	byidx;
 568
 569	/* This lock only affects elements except for entry. */
 570	rwlock_t		lock;
 571	refcount_t		refcnt;
 
 572	struct timer_list	timer;
 573
 574	atomic_t		genid;
 575	u32			priority;
 576	u32			index;
 
 577	struct xfrm_mark	mark;
 578	struct xfrm_selector	selector;
 579	struct xfrm_lifetime_cfg lft;
 580	struct xfrm_lifetime_cur curlft;
 581	struct xfrm_policy_walk_entry walk;
 582	struct xfrm_policy_queue polq;
 
 583	u8			type;
 584	u8			action;
 585	u8			flags;
 586	u8			xfrm_nr;
 587	u16			family;
 588	struct xfrm_sec_ctx	*security;
 589	struct xfrm_tmpl       	xfrm_vec[XFRM_MAX_DEPTH];
 
 590	struct rcu_head		rcu;
 
 
 591};
 592
 593static inline struct net *xp_net(const struct xfrm_policy *xp)
 594{
 595	return read_pnet(&xp->xp_net);
 596}
 597
 598struct xfrm_kmaddress {
 599	xfrm_address_t          local;
 600	xfrm_address_t          remote;
 601	u32			reserved;
 602	u16			family;
 603};
 604
 605struct xfrm_migrate {
 606	xfrm_address_t		old_daddr;
 607	xfrm_address_t		old_saddr;
 608	xfrm_address_t		new_daddr;
 609	xfrm_address_t		new_saddr;
 610	u8			proto;
 611	u8			mode;
 612	u16			reserved;
 613	u32			reqid;
 614	u16			old_family;
 615	u16			new_family;
 616};
 617
 618#define XFRM_KM_TIMEOUT                30
 619/* what happened */
 620#define XFRM_REPLAY_UPDATE	XFRM_AE_CR
 621#define XFRM_REPLAY_TIMEOUT	XFRM_AE_CE
 622
 623/* default aevent timeout in units of 100ms */
 624#define XFRM_AE_ETIME			10
 625/* Async Event timer multiplier */
 626#define XFRM_AE_ETH_M			10
 627/* default seq threshold size */
 628#define XFRM_AE_SEQT_SIZE		2
 629
 630struct xfrm_mgr {
 631	struct list_head	list;
 632	int			(*notify)(struct xfrm_state *x, const struct km_event *c);
 633	int			(*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
 634	struct xfrm_policy	*(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
 635	int			(*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
 636	int			(*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
 637	int			(*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
 638	int			(*migrate)(const struct xfrm_selector *sel,
 639					   u8 dir, u8 type,
 640					   const struct xfrm_migrate *m,
 641					   int num_bundles,
 642					   const struct xfrm_kmaddress *k,
 643					   const struct xfrm_encap_tmpl *encap);
 644	bool			(*is_alive)(const struct km_event *c);
 645};
 646
 647int xfrm_register_km(struct xfrm_mgr *km);
 648int xfrm_unregister_km(struct xfrm_mgr *km);
 649
 650struct xfrm_tunnel_skb_cb {
 651	union {
 652		struct inet_skb_parm h4;
 653		struct inet6_skb_parm h6;
 654	} header;
 655
 656	union {
 657		struct ip_tunnel *ip4;
 658		struct ip6_tnl *ip6;
 659	} tunnel;
 660};
 661
 662#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
 663
 664/*
 665 * This structure is used for the duration where packets are being
 666 * transformed by IPsec.  As soon as the packet leaves IPsec the
 667 * area beyond the generic IP part may be overwritten.
 668 */
 669struct xfrm_skb_cb {
 670	struct xfrm_tunnel_skb_cb header;
 671
 672        /* Sequence number for replay protection. */
 673	union {
 674		struct {
 675			__u32 low;
 676			__u32 hi;
 677		} output;
 678		struct {
 679			__be32 low;
 680			__be32 hi;
 681		} input;
 682	} seq;
 683};
 684
 685#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
 686
 687/*
 688 * This structure is used by the afinfo prepare_input/prepare_output functions
 689 * to transmit header information to the mode input/output functions.
 690 */
 691struct xfrm_mode_skb_cb {
 692	struct xfrm_tunnel_skb_cb header;
 693
 694	/* Copied from header for IPv4, always set to zero and DF for IPv6. */
 695	__be16 id;
 696	__be16 frag_off;
 697
 698	/* IP header length (excluding options or extension headers). */
 699	u8 ihl;
 700
 701	/* TOS for IPv4, class for IPv6. */
 702	u8 tos;
 703
 704	/* TTL for IPv4, hop limitfor IPv6. */
 705	u8 ttl;
 706
 707	/* Protocol for IPv4, NH for IPv6. */
 708	u8 protocol;
 709
 710	/* Option length for IPv4, zero for IPv6. */
 711	u8 optlen;
 712
 713	/* Used by IPv6 only, zero for IPv4. */
 714	u8 flow_lbl[3];
 715};
 716
 717#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
 718
 719/*
 720 * This structure is used by the input processing to locate the SPI and
 721 * related information.
 722 */
 723struct xfrm_spi_skb_cb {
 724	struct xfrm_tunnel_skb_cb header;
 725
 726	unsigned int daddroff;
 727	unsigned int family;
 728	__be32 seq;
 729};
 730
 731#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
 732
 733#ifdef CONFIG_AUDITSYSCALL
 734static inline struct audit_buffer *xfrm_audit_start(const char *op)
 735{
 736	struct audit_buffer *audit_buf = NULL;
 737
 738	if (audit_enabled == 0)
 739		return NULL;
 740	audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
 741				    AUDIT_MAC_IPSEC_EVENT);
 742	if (audit_buf == NULL)
 743		return NULL;
 744	audit_log_format(audit_buf, "op=%s", op);
 745	return audit_buf;
 746}
 747
 748static inline void xfrm_audit_helper_usrinfo(bool task_valid,
 749					     struct audit_buffer *audit_buf)
 750{
 751	const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
 752					    audit_get_loginuid(current) :
 753					    INVALID_UID);
 754	const unsigned int ses = task_valid ? audit_get_sessionid(current) :
 755		(unsigned int) -1;
 756
 757	audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
 758	audit_log_task_context(audit_buf);
 759}
 760
 761void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
 762void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
 763			      bool task_valid);
 764void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
 765void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
 766void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
 767				      struct sk_buff *skb);
 768void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
 769			     __be32 net_seq);
 770void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
 771void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
 772			       __be32 net_seq);
 773void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
 774			      u8 proto);
 775#else
 776
 777static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
 778					 bool task_valid)
 779{
 780}
 781
 782static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
 783					    bool task_valid)
 784{
 785}
 786
 787static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
 788					bool task_valid)
 789{
 790}
 791
 792static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
 793					   bool task_valid)
 794{
 795}
 796
 797static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
 798					     struct sk_buff *skb)
 799{
 800}
 801
 802static inline void xfrm_audit_state_replay(struct xfrm_state *x,
 803					   struct sk_buff *skb, __be32 net_seq)
 804{
 805}
 806
 807static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
 808				      u16 family)
 809{
 810}
 811
 812static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
 813				      __be32 net_spi, __be32 net_seq)
 814{
 815}
 816
 817static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
 818				     struct sk_buff *skb, u8 proto)
 819{
 820}
 821#endif /* CONFIG_AUDITSYSCALL */
 822
 823static inline void xfrm_pol_hold(struct xfrm_policy *policy)
 824{
 825	if (likely(policy != NULL))
 826		refcount_inc(&policy->refcnt);
 827}
 828
 829void xfrm_policy_destroy(struct xfrm_policy *policy);
 830
 831static inline void xfrm_pol_put(struct xfrm_policy *policy)
 832{
 833	if (refcount_dec_and_test(&policy->refcnt))
 834		xfrm_policy_destroy(policy);
 835}
 836
 837static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
 838{
 839	int i;
 840	for (i = npols - 1; i >= 0; --i)
 841		xfrm_pol_put(pols[i]);
 842}
 843
 844void __xfrm_state_destroy(struct xfrm_state *);
 845
 846static inline void __xfrm_state_put(struct xfrm_state *x)
 847{
 848	refcount_dec(&x->refcnt);
 849}
 850
 851static inline void xfrm_state_put(struct xfrm_state *x)
 852{
 853	if (refcount_dec_and_test(&x->refcnt))
 854		__xfrm_state_destroy(x);
 
 
 
 
 
 
 855}
 856
 857static inline void xfrm_state_hold(struct xfrm_state *x)
 858{
 859	refcount_inc(&x->refcnt);
 860}
 861
 862static inline bool addr_match(const void *token1, const void *token2,
 863			      unsigned int prefixlen)
 864{
 865	const __be32 *a1 = token1;
 866	const __be32 *a2 = token2;
 867	unsigned int pdw;
 868	unsigned int pbi;
 869
 870	pdw = prefixlen >> 5;	  /* num of whole u32 in prefix */
 871	pbi = prefixlen &  0x1f;  /* num of bits in incomplete u32 in prefix */
 872
 873	if (pdw)
 874		if (memcmp(a1, a2, pdw << 2))
 875			return false;
 876
 877	if (pbi) {
 878		__be32 mask;
 879
 880		mask = htonl((0xffffffff) << (32 - pbi));
 881
 882		if ((a1[pdw] ^ a2[pdw]) & mask)
 883			return false;
 884	}
 885
 886	return true;
 887}
 888
 889static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
 890{
 891	/* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
 892	if (sizeof(long) == 4 && prefixlen == 0)
 893		return true;
 894	return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
 895}
 896
 897static __inline__
 898__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
 899{
 900	__be16 port;
 901	switch(fl->flowi_proto) {
 902	case IPPROTO_TCP:
 903	case IPPROTO_UDP:
 904	case IPPROTO_UDPLITE:
 905	case IPPROTO_SCTP:
 906		port = uli->ports.sport;
 907		break;
 908	case IPPROTO_ICMP:
 909	case IPPROTO_ICMPV6:
 910		port = htons(uli->icmpt.type);
 911		break;
 912	case IPPROTO_MH:
 913		port = htons(uli->mht.type);
 914		break;
 915	case IPPROTO_GRE:
 916		port = htons(ntohl(uli->gre_key) >> 16);
 917		break;
 918	default:
 919		port = 0;	/*XXX*/
 920	}
 921	return port;
 922}
 923
 924static __inline__
 925__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
 926{
 927	__be16 port;
 928	switch(fl->flowi_proto) {
 929	case IPPROTO_TCP:
 930	case IPPROTO_UDP:
 931	case IPPROTO_UDPLITE:
 932	case IPPROTO_SCTP:
 933		port = uli->ports.dport;
 934		break;
 935	case IPPROTO_ICMP:
 936	case IPPROTO_ICMPV6:
 937		port = htons(uli->icmpt.code);
 938		break;
 939	case IPPROTO_GRE:
 940		port = htons(ntohl(uli->gre_key) & 0xffff);
 941		break;
 942	default:
 943		port = 0;	/*XXX*/
 944	}
 945	return port;
 946}
 947
 948bool xfrm_selector_match(const struct xfrm_selector *sel,
 949			 const struct flowi *fl, unsigned short family);
 950
 951#ifdef CONFIG_SECURITY_NETWORK_XFRM
 952/*	If neither has a context --> match
 953 * 	Otherwise, both must have a context and the sids, doi, alg must match
 954 */
 955static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
 956{
 957	return ((!s1 && !s2) ||
 958		(s1 && s2 &&
 959		 (s1->ctx_sid == s2->ctx_sid) &&
 960		 (s1->ctx_doi == s2->ctx_doi) &&
 961		 (s1->ctx_alg == s2->ctx_alg)));
 962}
 963#else
 964static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
 965{
 966	return true;
 967}
 968#endif
 969
 970/* A struct encoding bundle of transformations to apply to some set of flow.
 971 *
 972 * xdst->child points to the next element of bundle.
 973 * dst->xfrm  points to an instanse of transformer.
 974 *
 975 * Due to unfortunate limitations of current routing cache, which we
 976 * have no time to fix, it mirrors struct rtable and bound to the same
 977 * routing key, including saddr,daddr. However, we can have many of
 978 * bundles differing by session id. All the bundles grow from a parent
 979 * policy rule.
 980 */
 981struct xfrm_dst {
 982	union {
 983		struct dst_entry	dst;
 984		struct rtable		rt;
 985		struct rt6_info		rt6;
 986	} u;
 987	struct dst_entry *route;
 988	struct dst_entry *child;
 989	struct dst_entry *path;
 990	struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
 991	int num_pols, num_xfrms;
 992	u32 xfrm_genid;
 993	u32 policy_genid;
 994	u32 route_mtu_cached;
 995	u32 child_mtu_cached;
 996	u32 route_cookie;
 997	u32 path_cookie;
 998};
 999
1000static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
1001{
1002#ifdef CONFIG_XFRM
1003	if (dst->xfrm) {
1004		const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
1005
1006		return xdst->path;
1007	}
1008#endif
1009	return (struct dst_entry *) dst;
1010}
1011
1012static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
1013{
1014#ifdef CONFIG_XFRM
1015	if (dst->xfrm) {
1016		struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
1017		return xdst->child;
1018	}
1019#endif
1020	return NULL;
1021}
1022
1023#ifdef CONFIG_XFRM
1024static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
1025{
1026	xdst->child = child;
1027}
1028
1029static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
1030{
1031	xfrm_pols_put(xdst->pols, xdst->num_pols);
1032	dst_release(xdst->route);
1033	if (likely(xdst->u.dst.xfrm))
1034		xfrm_state_put(xdst->u.dst.xfrm);
1035}
1036#endif
1037
1038void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1039
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1040struct xfrm_offload {
1041	/* Output sequence number for replay protection on offloading. */
1042	struct {
1043		__u32 low;
1044		__u32 hi;
1045	} seq;
1046
1047	__u32			flags;
1048#define	SA_DELETE_REQ		1
1049#define	CRYPTO_DONE		2
1050#define	CRYPTO_NEXT_DONE	4
1051#define	CRYPTO_FALLBACK		8
1052#define	XFRM_GSO_SEGMENT	16
1053#define	XFRM_GRO		32
1054#define	XFRM_ESP_NO_TRAILER	64
1055#define	XFRM_DEV_RESUME		128
 
1056
1057	__u32			status;
1058#define CRYPTO_SUCCESS				1
1059#define CRYPTO_GENERIC_ERROR			2
1060#define CRYPTO_TRANSPORT_AH_AUTH_FAILED		4
1061#define CRYPTO_TRANSPORT_ESP_AUTH_FAILED	8
1062#define CRYPTO_TUNNEL_AH_AUTH_FAILED		16
1063#define CRYPTO_TUNNEL_ESP_AUTH_FAILED		32
1064#define CRYPTO_INVALID_PACKET_SYNTAX		64
1065#define CRYPTO_INVALID_PROTOCOL			128
1066
1067	__u8			proto;
 
1068};
1069
1070struct sec_path {
1071	refcount_t		refcnt;
1072	int			len;
1073	int			olen;
 
1074
1075	struct xfrm_state	*xvec[XFRM_MAX_DEPTH];
1076	struct xfrm_offload	ovec[XFRM_MAX_OFFLOAD_DEPTH];
1077};
1078
1079static inline int secpath_exists(struct sk_buff *skb)
1080{
1081#ifdef CONFIG_XFRM
1082	return skb->sp != NULL;
1083#else
1084	return 0;
1085#endif
1086}
1087
1088static inline struct sec_path *
1089secpath_get(struct sec_path *sp)
1090{
1091	if (sp)
1092		refcount_inc(&sp->refcnt);
1093	return sp;
1094}
1095
1096void __secpath_destroy(struct sec_path *sp);
1097
1098static inline void
1099secpath_put(struct sec_path *sp)
1100{
1101	if (sp && refcount_dec_and_test(&sp->refcnt))
1102		__secpath_destroy(sp);
1103}
1104
1105struct sec_path *secpath_dup(struct sec_path *src);
1106int secpath_set(struct sk_buff *skb);
1107
1108static inline void
1109secpath_reset(struct sk_buff *skb)
1110{
1111#ifdef CONFIG_XFRM
1112	secpath_put(skb->sp);
1113	skb->sp = NULL;
1114#endif
1115}
1116
1117static inline int
1118xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1119{
1120	switch (family) {
1121	case AF_INET:
1122		return addr->a4 == 0;
1123	case AF_INET6:
1124		return ipv6_addr_any(&addr->in6);
1125	}
1126	return 0;
1127}
1128
1129static inline int
1130__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1131{
1132	return	(tmpl->saddr.a4 &&
1133		 tmpl->saddr.a4 != x->props.saddr.a4);
1134}
1135
1136static inline int
1137__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1138{
1139	return	(!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1140		 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1141}
1142
1143static inline int
1144xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1145{
1146	switch (family) {
1147	case AF_INET:
1148		return __xfrm4_state_addr_cmp(tmpl, x);
1149	case AF_INET6:
1150		return __xfrm6_state_addr_cmp(tmpl, x);
1151	}
1152	return !0;
1153}
1154
1155#ifdef CONFIG_XFRM
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1156int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1157			unsigned short family);
1158
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1159static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1160				       struct sk_buff *skb,
1161				       unsigned int family, int reverse)
1162{
1163	struct net *net = dev_net(skb->dev);
1164	int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
 
 
1165
1166	if (sk && sk->sk_policy[XFRM_POLICY_IN])
1167		return __xfrm_policy_check(sk, ndir, skb, family);
1168
1169	return	(!net->xfrm.policy_count[dir] && !skb->sp) ||
1170		(skb_dst(skb)->flags & DST_NOPOLICY) ||
1171		__xfrm_policy_check(sk, ndir, skb, family);
 
 
 
 
 
 
 
1172}
1173
1174static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1175{
1176	return __xfrm_policy_check2(sk, dir, skb, family, 0);
1177}
1178
1179static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1180{
1181	return xfrm_policy_check(sk, dir, skb, AF_INET);
1182}
1183
1184static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1185{
1186	return xfrm_policy_check(sk, dir, skb, AF_INET6);
1187}
1188
1189static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1190					     struct sk_buff *skb)
1191{
1192	return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1193}
1194
1195static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1196					     struct sk_buff *skb)
1197{
1198	return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1199}
1200
1201int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1202			  unsigned int family, int reverse);
1203
1204static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1205				      unsigned int family)
1206{
1207	return __xfrm_decode_session(skb, fl, family, 0);
1208}
1209
1210static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1211					      struct flowi *fl,
1212					      unsigned int family)
1213{
1214	return __xfrm_decode_session(skb, fl, family, 1);
1215}
1216
1217int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1218
1219static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1220{
1221	struct net *net = dev_net(skb->dev);
1222
1223	return	!net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1224		(skb_dst(skb)->flags & DST_NOXFRM) ||
1225		__xfrm_route_forward(skb, family);
 
 
 
1226}
1227
1228static inline int xfrm4_route_forward(struct sk_buff *skb)
1229{
1230	return xfrm_route_forward(skb, AF_INET);
1231}
1232
1233static inline int xfrm6_route_forward(struct sk_buff *skb)
1234{
1235	return xfrm_route_forward(skb, AF_INET6);
1236}
1237
1238int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1239
1240static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1241{
 
 
1242	sk->sk_policy[0] = NULL;
1243	sk->sk_policy[1] = NULL;
1244	if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1245		return __xfrm_sk_clone_policy(sk, osk);
1246	return 0;
1247}
1248
1249int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1250
1251static inline void xfrm_sk_free_policy(struct sock *sk)
1252{
1253	struct xfrm_policy *pol;
1254
1255	pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1256	if (unlikely(pol != NULL)) {
1257		xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1258		sk->sk_policy[0] = NULL;
1259	}
1260	pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1261	if (unlikely(pol != NULL)) {
1262		xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1263		sk->sk_policy[1] = NULL;
1264	}
1265}
1266
1267#else
1268
1269static inline void xfrm_sk_free_policy(struct sock *sk) {}
1270static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1271static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1272static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1273static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1274{
1275	return 1;
1276}
1277static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1278{
1279	return 1;
1280}
1281static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1282{
1283	return 1;
1284}
1285static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1286					      struct flowi *fl,
1287					      unsigned int family)
1288{
1289	return -ENOSYS;
1290}
1291static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1292					     struct sk_buff *skb)
1293{
1294	return 1;
1295}
1296static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1297					     struct sk_buff *skb)
1298{
1299	return 1;
1300}
1301#endif
1302
1303static __inline__
1304xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1305{
1306	switch (family){
1307	case AF_INET:
1308		return (xfrm_address_t *)&fl->u.ip4.daddr;
1309	case AF_INET6:
1310		return (xfrm_address_t *)&fl->u.ip6.daddr;
1311	}
1312	return NULL;
1313}
1314
1315static __inline__
1316xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1317{
1318	switch (family){
1319	case AF_INET:
1320		return (xfrm_address_t *)&fl->u.ip4.saddr;
1321	case AF_INET6:
1322		return (xfrm_address_t *)&fl->u.ip6.saddr;
1323	}
1324	return NULL;
1325}
1326
1327static __inline__
1328void xfrm_flowi_addr_get(const struct flowi *fl,
1329			 xfrm_address_t *saddr, xfrm_address_t *daddr,
1330			 unsigned short family)
1331{
1332	switch(family) {
1333	case AF_INET:
1334		memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1335		memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1336		break;
1337	case AF_INET6:
1338		saddr->in6 = fl->u.ip6.saddr;
1339		daddr->in6 = fl->u.ip6.daddr;
1340		break;
1341	}
1342}
1343
1344static __inline__ int
1345__xfrm4_state_addr_check(const struct xfrm_state *x,
1346			 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1347{
1348	if (daddr->a4 == x->id.daddr.a4 &&
1349	    (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1350		return 1;
1351	return 0;
1352}
1353
1354static __inline__ int
1355__xfrm6_state_addr_check(const struct xfrm_state *x,
1356			 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1357{
1358	if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1359	    (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1360	     ipv6_addr_any((struct in6_addr *)saddr) ||
1361	     ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1362		return 1;
1363	return 0;
1364}
1365
1366static __inline__ int
1367xfrm_state_addr_check(const struct xfrm_state *x,
1368		      const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1369		      unsigned short family)
1370{
1371	switch (family) {
1372	case AF_INET:
1373		return __xfrm4_state_addr_check(x, daddr, saddr);
1374	case AF_INET6:
1375		return __xfrm6_state_addr_check(x, daddr, saddr);
1376	}
1377	return 0;
1378}
1379
1380static __inline__ int
1381xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1382			   unsigned short family)
1383{
1384	switch (family) {
1385	case AF_INET:
1386		return __xfrm4_state_addr_check(x,
1387						(const xfrm_address_t *)&fl->u.ip4.daddr,
1388						(const xfrm_address_t *)&fl->u.ip4.saddr);
1389	case AF_INET6:
1390		return __xfrm6_state_addr_check(x,
1391						(const xfrm_address_t *)&fl->u.ip6.daddr,
1392						(const xfrm_address_t *)&fl->u.ip6.saddr);
1393	}
1394	return 0;
1395}
1396
1397static inline int xfrm_state_kern(const struct xfrm_state *x)
1398{
1399	return atomic_read(&x->tunnel_users);
1400}
1401
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1402static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1403{
1404	return (!userproto || proto == userproto ||
1405		(userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1406						  proto == IPPROTO_ESP ||
1407						  proto == IPPROTO_COMP)));
1408}
1409
1410/*
1411 * xfrm algorithm information
1412 */
1413struct xfrm_algo_aead_info {
1414	char *geniv;
1415	u16 icv_truncbits;
1416};
1417
1418struct xfrm_algo_auth_info {
1419	u16 icv_truncbits;
1420	u16 icv_fullbits;
1421};
1422
1423struct xfrm_algo_encr_info {
1424	char *geniv;
1425	u16 blockbits;
1426	u16 defkeybits;
1427};
1428
1429struct xfrm_algo_comp_info {
1430	u16 threshold;
1431};
1432
1433struct xfrm_algo_desc {
1434	char *name;
1435	char *compat;
1436	u8 available:1;
1437	u8 pfkey_supported:1;
1438	union {
1439		struct xfrm_algo_aead_info aead;
1440		struct xfrm_algo_auth_info auth;
1441		struct xfrm_algo_encr_info encr;
1442		struct xfrm_algo_comp_info comp;
1443	} uinfo;
1444	struct sadb_alg desc;
1445};
1446
1447/* XFRM protocol handlers.  */
1448struct xfrm4_protocol {
1449	int (*handler)(struct sk_buff *skb);
1450	int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1451			     int encap_type);
1452	int (*cb_handler)(struct sk_buff *skb, int err);
1453	int (*err_handler)(struct sk_buff *skb, u32 info);
1454
1455	struct xfrm4_protocol __rcu *next;
1456	int priority;
1457};
1458
1459struct xfrm6_protocol {
1460	int (*handler)(struct sk_buff *skb);
 
 
1461	int (*cb_handler)(struct sk_buff *skb, int err);
1462	int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1463			   u8 type, u8 code, int offset, __be32 info);
1464
1465	struct xfrm6_protocol __rcu *next;
1466	int priority;
1467};
1468
1469/* XFRM tunnel handlers.  */
1470struct xfrm_tunnel {
1471	int (*handler)(struct sk_buff *skb);
 
1472	int (*err_handler)(struct sk_buff *skb, u32 info);
1473
1474	struct xfrm_tunnel __rcu *next;
1475	int priority;
1476};
1477
1478struct xfrm6_tunnel {
1479	int (*handler)(struct sk_buff *skb);
 
1480	int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1481			   u8 type, u8 code, int offset, __be32 info);
1482	struct xfrm6_tunnel __rcu *next;
1483	int priority;
1484};
1485
1486void xfrm_init(void);
1487void xfrm4_init(void);
1488int xfrm_state_init(struct net *net);
1489void xfrm_state_fini(struct net *net);
1490void xfrm4_state_init(void);
1491void xfrm4_protocol_init(void);
1492#ifdef CONFIG_XFRM
1493int xfrm6_init(void);
1494void xfrm6_fini(void);
1495int xfrm6_state_init(void);
1496void xfrm6_state_fini(void);
1497int xfrm6_protocol_init(void);
1498void xfrm6_protocol_fini(void);
1499#else
1500static inline int xfrm6_init(void)
1501{
1502	return 0;
1503}
1504static inline void xfrm6_fini(void)
1505{
1506	;
1507}
1508#endif
1509
1510#ifdef CONFIG_XFRM_STATISTICS
1511int xfrm_proc_init(struct net *net);
1512void xfrm_proc_fini(struct net *net);
1513#endif
1514
1515int xfrm_sysctl_init(struct net *net);
1516#ifdef CONFIG_SYSCTL
1517void xfrm_sysctl_fini(struct net *net);
1518#else
1519static inline void xfrm_sysctl_fini(struct net *net)
1520{
1521}
1522#endif
1523
1524void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1525			  struct xfrm_address_filter *filter);
1526int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1527		    int (*func)(struct xfrm_state *, int, void*), void *);
1528void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1529struct xfrm_state *xfrm_state_alloc(struct net *net);
 
1530struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1531				   const xfrm_address_t *saddr,
1532				   const struct flowi *fl,
1533				   struct xfrm_tmpl *tmpl,
1534				   struct xfrm_policy *pol, int *err,
1535				   unsigned short family);
1536struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1537				       xfrm_address_t *daddr,
1538				       xfrm_address_t *saddr,
1539				       unsigned short family,
1540				       u8 mode, u8 proto, u32 reqid);
1541struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1542					      unsigned short family);
1543int xfrm_state_check_expire(struct xfrm_state *x);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1544void xfrm_state_insert(struct xfrm_state *x);
1545int xfrm_state_add(struct xfrm_state *x);
1546int xfrm_state_update(struct xfrm_state *x);
1547struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1548				     const xfrm_address_t *daddr, __be32 spi,
1549				     u8 proto, unsigned short family);
1550struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1551					    const xfrm_address_t *daddr,
1552					    const xfrm_address_t *saddr,
1553					    u8 proto,
1554					    unsigned short family);
1555#ifdef CONFIG_XFRM_SUB_POLICY
1556int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1557		   unsigned short family, struct net *net);
1558int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1559		    unsigned short family);
 
 
1560#else
1561static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1562				 int n, unsigned short family, struct net *net)
1563{
1564	return -ENOSYS;
1565}
1566
1567static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1568				  int n, unsigned short family)
1569{
1570	return -ENOSYS;
1571}
1572#endif
1573
1574struct xfrmk_sadinfo {
1575	u32 sadhcnt; /* current hash bkts */
1576	u32 sadhmcnt; /* max allowed hash bkts */
1577	u32 sadcnt; /* current running count */
1578};
1579
1580struct xfrmk_spdinfo {
1581	u32 incnt;
1582	u32 outcnt;
1583	u32 fwdcnt;
1584	u32 inscnt;
1585	u32 outscnt;
1586	u32 fwdscnt;
1587	u32 spdhcnt;
1588	u32 spdhmcnt;
1589};
1590
1591struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1592int xfrm_state_delete(struct xfrm_state *x);
1593int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1594int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
 
 
1595void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1596void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1597u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1598int xfrm_init_replay(struct xfrm_state *x);
1599int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1600int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
 
1601int xfrm_init_state(struct xfrm_state *x);
1602int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1603int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1604int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
 
 
 
1605int xfrm_trans_queue(struct sk_buff *skb,
1606		     int (*finish)(struct net *, struct sock *,
1607				   struct sk_buff *));
1608int xfrm_output_resume(struct sk_buff *skb, int err);
1609int xfrm_output(struct sock *sk, struct sk_buff *skb);
1610int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
 
 
 
 
1611void xfrm_local_error(struct sk_buff *skb, int mtu);
1612int xfrm4_extract_header(struct sk_buff *skb);
1613int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1614int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1615		    int encap_type);
1616int xfrm4_transport_finish(struct sk_buff *skb, int async);
1617int xfrm4_rcv(struct sk_buff *skb);
1618int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1619
1620static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1621{
1622	XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1623	XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1624	XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1625	return xfrm_input(skb, nexthdr, spi, 0);
1626}
1627
1628int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1629int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1630int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1631int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1632int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1633int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1634int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1635int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1636int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1637void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1638int xfrm6_extract_header(struct sk_buff *skb);
1639int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1640int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1641		  struct ip6_tnl *t);
 
 
1642int xfrm6_transport_finish(struct sk_buff *skb, int async);
1643int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1644int xfrm6_rcv(struct sk_buff *skb);
1645int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1646		     xfrm_address_t *saddr, u8 proto);
1647void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1648int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1649int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1650int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1651int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1652int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1653__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1654__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1655int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1656int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1657int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1658int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1659int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1660			  u8 **prevhdr);
1661
1662#ifdef CONFIG_XFRM
 
1663int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1664int xfrm_user_policy(struct sock *sk, int optname,
1665		     u8 __user *optval, int optlen);
 
 
 
 
 
1666#else
1667static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
 
1668{
1669 	return -ENOPROTOOPT;
1670}
1671
1672static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1673{
1674 	/* should not happen */
1675 	kfree_skb(skb);
1676	return 0;
1677}
1678#endif
1679
1680struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1681				    const xfrm_address_t *saddr,
1682				    const xfrm_address_t *daddr,
1683				    int family, u32 mark);
1684
1685struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1686
1687void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1688int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1689		     int (*func)(struct xfrm_policy *, int, int, void*),
1690		     void *);
1691void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1692int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1693struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1694					  u8 type, int dir,
 
1695					  struct xfrm_selector *sel,
1696					  struct xfrm_sec_ctx *ctx, int delete,
1697					  int *err);
1698struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1699				     u32 id, int delete, int *err);
 
 
1700int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1701void xfrm_policy_hash_rebuild(struct net *net);
1702u32 xfrm_get_acqseq(void);
1703int verify_spi_info(u8 proto, u32 min, u32 max);
1704int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
 
1705struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1706				 u8 mode, u32 reqid, u8 proto,
1707				 const xfrm_address_t *daddr,
1708				 const xfrm_address_t *saddr, int create,
1709				 unsigned short family);
1710int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1711
1712#ifdef CONFIG_XFRM_MIGRATE
1713int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1714	       const struct xfrm_migrate *m, int num_bundles,
1715	       const struct xfrm_kmaddress *k,
1716	       const struct xfrm_encap_tmpl *encap);
1717struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
 
1718struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1719				      struct xfrm_migrate *m,
1720				      struct xfrm_encap_tmpl *encap);
1721int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1722		 struct xfrm_migrate *m, int num_bundles,
1723		 struct xfrm_kmaddress *k, struct net *net,
1724		 struct xfrm_encap_tmpl *encap);
 
1725#endif
1726
1727int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1728void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1729int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1730	      xfrm_address_t *addr);
1731
1732void xfrm_input_init(void);
1733int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1734
1735void xfrm_probe_algs(void);
1736int xfrm_count_pfkey_auth_supported(void);
1737int xfrm_count_pfkey_enc_supported(void);
1738struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1739struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1740struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1741struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1742struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1743struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1744struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1745struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1746struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1747					    int probe);
1748
1749static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1750				    const xfrm_address_t *b)
1751{
1752	return ipv6_addr_equal((const struct in6_addr *)a,
1753			       (const struct in6_addr *)b);
1754}
1755
1756static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1757				   const xfrm_address_t *b,
1758				   sa_family_t family)
1759{
1760	switch (family) {
1761	default:
1762	case AF_INET:
1763		return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1764	case AF_INET6:
1765		return xfrm6_addr_equal(a, b);
1766	}
1767}
1768
1769static inline int xfrm_policy_id2dir(u32 index)
1770{
1771	return index & 7;
1772}
1773
1774#ifdef CONFIG_XFRM
 
 
 
 
 
 
1775static inline int xfrm_aevent_is_on(struct net *net)
1776{
1777	struct sock *nlsk;
1778	int ret = 0;
1779
1780	rcu_read_lock();
1781	nlsk = rcu_dereference(net->xfrm.nlsk);
1782	if (nlsk)
1783		ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1784	rcu_read_unlock();
1785	return ret;
1786}
1787
1788static inline int xfrm_acquire_is_on(struct net *net)
1789{
1790	struct sock *nlsk;
1791	int ret = 0;
1792
1793	rcu_read_lock();
1794	nlsk = rcu_dereference(net->xfrm.nlsk);
1795	if (nlsk)
1796		ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1797	rcu_read_unlock();
1798
1799	return ret;
1800}
1801#endif
1802
1803static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1804{
1805	return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1806}
1807
1808static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1809{
1810	return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1811}
1812
1813static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1814{
1815	return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1816}
1817
1818static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1819{
1820	return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1821}
1822
1823#ifdef CONFIG_XFRM_MIGRATE
1824static inline int xfrm_replay_clone(struct xfrm_state *x,
1825				     struct xfrm_state *orig)
1826{
1827	x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
 
 
1828				GFP_KERNEL);
1829	if (!x->replay_esn)
1830		return -ENOMEM;
1831
1832	x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1833	x->replay_esn->replay_window = orig->replay_esn->replay_window;
1834
1835	x->preplay_esn = kmemdup(x->replay_esn,
1836				 xfrm_replay_state_esn_len(x->replay_esn),
1837				 GFP_KERNEL);
1838	if (!x->preplay_esn) {
1839		kfree(x->replay_esn);
1840		return -ENOMEM;
1841	}
1842
1843	return 0;
1844}
1845
1846static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1847{
1848	return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1849}
1850
1851
1852static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1853{
1854	return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1855}
1856
1857static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1858{
1859	return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1860}
1861
1862static inline void xfrm_states_put(struct xfrm_state **states, int n)
1863{
1864	int i;
1865	for (i = 0; i < n; i++)
1866		xfrm_state_put(*(states + i));
1867}
1868
1869static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1870{
1871	int i;
1872	for (i = 0; i < n; i++)
1873		xfrm_state_delete(*(states + i));
1874}
1875#endif
1876
1877#ifdef CONFIG_XFRM
1878static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1879{
1880	return skb->sp->xvec[skb->sp->len - 1];
1881}
1882#endif
1883
1884static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1885{
1886#ifdef CONFIG_XFRM
1887	struct sec_path *sp = skb->sp;
1888
1889	if (!sp || !sp->olen || sp->len != sp->olen)
1890		return NULL;
1891
1892	return &sp->ovec[sp->olen - 1];
1893#else
1894	return NULL;
1895#endif
1896}
1897
1898void __init xfrm_dev_init(void);
1899
1900#ifdef CONFIG_XFRM_OFFLOAD
1901void xfrm_dev_resume(struct sk_buff *skb);
1902void xfrm_dev_backlog(struct softnet_data *sd);
1903struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1904int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1905		       struct xfrm_user_offload *xuo);
 
 
 
 
1906bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1907
1908static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1909{
1910	struct xfrm_state_offload *xso = &x->xso;
1911
1912	if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1913		xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1914}
1915
1916static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1917{
1918	struct xfrm_state *x = dst->xfrm;
1919	struct xfrm_dst *xdst;
1920
1921	if (!x || !x->type_offload)
1922		return false;
1923
1924	xdst = (struct xfrm_dst *) dst;
1925	if (!x->xso.offload_handle && !xdst->child->xfrm)
1926		return true;
1927	if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1928	    !xdst->child->xfrm)
1929		return true;
1930
1931	return false;
1932}
1933
1934static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1935{
1936	struct xfrm_state_offload *xso = &x->xso;
1937
1938	if (xso->dev)
1939		xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1940}
1941
1942static inline void xfrm_dev_state_free(struct xfrm_state *x)
1943{
1944	struct xfrm_state_offload *xso = &x->xso;
1945	 struct net_device *dev = xso->dev;
1946
1947	if (dev && dev->xfrmdev_ops) {
1948		if (dev->xfrmdev_ops->xdo_dev_state_free)
1949			dev->xfrmdev_ops->xdo_dev_state_free(x);
1950		xso->dev = NULL;
1951		dev_put(dev);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1952	}
1953}
1954#else
1955static inline void xfrm_dev_resume(struct sk_buff *skb)
1956{
1957}
1958
1959static inline void xfrm_dev_backlog(struct softnet_data *sd)
1960{
1961}
1962
1963static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1964{
1965	return skb;
1966}
1967
1968static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1969{
1970	return 0;
1971}
1972
1973static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1974{
1975}
1976
1977static inline void xfrm_dev_state_free(struct xfrm_state *x)
1978{
1979}
1980
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1981static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1982{
1983	return false;
1984}
1985
1986static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1987{
1988}
1989
1990static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1991{
1992	return false;
1993}
1994#endif
1995
1996static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1997{
1998	if (attrs[XFRMA_MARK])
1999		memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
2000	else
2001		m->v = m->m = 0;
2002
2003	return m->v & m->m;
2004}
2005
2006static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
2007{
2008	int ret = 0;
2009
2010	if (m->m | m->v)
2011		ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
2012	return ret;
2013}
2014
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2015static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
2016				    unsigned int family)
2017{
2018	bool tunnel = false;
2019
2020	switch(family) {
2021	case AF_INET:
2022		if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2023			tunnel = true;
2024		break;
2025	case AF_INET6:
2026		if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2027			tunnel = true;
2028		break;
2029	}
2030	if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
2031		return -EINVAL;
2032
2033	return 0;
2034}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2035#endif	/* _NET_XFRM_H */