xref: /openbmc/linux/net/key/af_key.c (revision 9d56dd3b083a3bec56e9da35ce07baca81030b03)
1 /*
2  * net/key/af_key.c	An implementation of PF_KEYv2 sockets.
3  *
4  *		This program is free software; you can redistribute it and/or
5  *		modify it under the terms of the GNU General Public License
6  *		as published by the Free Software Foundation; either version
7  *		2 of the License, or (at your option) any later version.
8  *
9  * Authors:	Maxim Giryaev	<gem@asplinux.ru>
10  *		David S. Miller	<davem@redhat.com>
11  *		Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12  *		Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13  *		Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14  *		Derek Atkins <derek@ihtfp.com>
15  */
16 
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/in.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <net/net_namespace.h>
30 #include <net/netns/generic.h>
31 #include <net/xfrm.h>
32 
33 #include <net/sock.h>
34 
35 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
36 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
37 
38 static int pfkey_net_id __read_mostly;
39 struct netns_pfkey {
40 	/* List of all pfkey sockets. */
41 	struct hlist_head table;
42 	atomic_t socks_nr;
43 };
44 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
45 static DEFINE_RWLOCK(pfkey_table_lock);
46 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
47 
48 struct pfkey_sock {
49 	/* struct sock must be the first member of struct pfkey_sock */
50 	struct sock	sk;
51 	int		registered;
52 	int		promisc;
53 
54 	struct {
55 		uint8_t		msg_version;
56 		uint32_t	msg_pid;
57 		int		(*dump)(struct pfkey_sock *sk);
58 		void		(*done)(struct pfkey_sock *sk);
59 		union {
60 			struct xfrm_policy_walk	policy;
61 			struct xfrm_state_walk	state;
62 		} u;
63 		struct sk_buff	*skb;
64 	} dump;
65 };
66 
67 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
68 {
69 	return (struct pfkey_sock *)sk;
70 }
71 
72 static int pfkey_can_dump(struct sock *sk)
73 {
74 	if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
75 		return 1;
76 	return 0;
77 }
78 
79 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
80 {
81 	if (pfk->dump.dump) {
82 		if (pfk->dump.skb) {
83 			kfree_skb(pfk->dump.skb);
84 			pfk->dump.skb = NULL;
85 		}
86 		pfk->dump.done(pfk);
87 		pfk->dump.dump = NULL;
88 		pfk->dump.done = NULL;
89 	}
90 }
91 
92 static void pfkey_sock_destruct(struct sock *sk)
93 {
94 	struct net *net = sock_net(sk);
95 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
96 
97 	pfkey_terminate_dump(pfkey_sk(sk));
98 	skb_queue_purge(&sk->sk_receive_queue);
99 
100 	if (!sock_flag(sk, SOCK_DEAD)) {
101 		printk("Attempt to release alive pfkey socket: %p\n", sk);
102 		return;
103 	}
104 
105 	WARN_ON(atomic_read(&sk->sk_rmem_alloc));
106 	WARN_ON(atomic_read(&sk->sk_wmem_alloc));
107 
108 	atomic_dec(&net_pfkey->socks_nr);
109 }
110 
111 static void pfkey_table_grab(void)
112 {
113 	write_lock_bh(&pfkey_table_lock);
114 
115 	if (atomic_read(&pfkey_table_users)) {
116 		DECLARE_WAITQUEUE(wait, current);
117 
118 		add_wait_queue_exclusive(&pfkey_table_wait, &wait);
119 		for(;;) {
120 			set_current_state(TASK_UNINTERRUPTIBLE);
121 			if (atomic_read(&pfkey_table_users) == 0)
122 				break;
123 			write_unlock_bh(&pfkey_table_lock);
124 			schedule();
125 			write_lock_bh(&pfkey_table_lock);
126 		}
127 
128 		__set_current_state(TASK_RUNNING);
129 		remove_wait_queue(&pfkey_table_wait, &wait);
130 	}
131 }
132 
133 static __inline__ void pfkey_table_ungrab(void)
134 {
135 	write_unlock_bh(&pfkey_table_lock);
136 	wake_up(&pfkey_table_wait);
137 }
138 
139 static __inline__ void pfkey_lock_table(void)
140 {
141 	/* read_lock() synchronizes us to pfkey_table_grab */
142 
143 	read_lock(&pfkey_table_lock);
144 	atomic_inc(&pfkey_table_users);
145 	read_unlock(&pfkey_table_lock);
146 }
147 
148 static __inline__ void pfkey_unlock_table(void)
149 {
150 	if (atomic_dec_and_test(&pfkey_table_users))
151 		wake_up(&pfkey_table_wait);
152 }
153 
154 
155 static const struct proto_ops pfkey_ops;
156 
157 static void pfkey_insert(struct sock *sk)
158 {
159 	struct net *net = sock_net(sk);
160 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
161 
162 	pfkey_table_grab();
163 	sk_add_node(sk, &net_pfkey->table);
164 	pfkey_table_ungrab();
165 }
166 
167 static void pfkey_remove(struct sock *sk)
168 {
169 	pfkey_table_grab();
170 	sk_del_node_init(sk);
171 	pfkey_table_ungrab();
172 }
173 
174 static struct proto key_proto = {
175 	.name	  = "KEY",
176 	.owner	  = THIS_MODULE,
177 	.obj_size = sizeof(struct pfkey_sock),
178 };
179 
180 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
181 			int kern)
182 {
183 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
184 	struct sock *sk;
185 	int err;
186 
187 	if (!capable(CAP_NET_ADMIN))
188 		return -EPERM;
189 	if (sock->type != SOCK_RAW)
190 		return -ESOCKTNOSUPPORT;
191 	if (protocol != PF_KEY_V2)
192 		return -EPROTONOSUPPORT;
193 
194 	err = -ENOMEM;
195 	sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
196 	if (sk == NULL)
197 		goto out;
198 
199 	sock->ops = &pfkey_ops;
200 	sock_init_data(sock, sk);
201 
202 	sk->sk_family = PF_KEY;
203 	sk->sk_destruct = pfkey_sock_destruct;
204 
205 	atomic_inc(&net_pfkey->socks_nr);
206 
207 	pfkey_insert(sk);
208 
209 	return 0;
210 out:
211 	return err;
212 }
213 
214 static int pfkey_release(struct socket *sock)
215 {
216 	struct sock *sk = sock->sk;
217 
218 	if (!sk)
219 		return 0;
220 
221 	pfkey_remove(sk);
222 
223 	sock_orphan(sk);
224 	sock->sk = NULL;
225 	skb_queue_purge(&sk->sk_write_queue);
226 	sock_put(sk);
227 
228 	return 0;
229 }
230 
231 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
232 			       gfp_t allocation, struct sock *sk)
233 {
234 	int err = -ENOBUFS;
235 
236 	sock_hold(sk);
237 	if (*skb2 == NULL) {
238 		if (atomic_read(&skb->users) != 1) {
239 			*skb2 = skb_clone(skb, allocation);
240 		} else {
241 			*skb2 = skb;
242 			atomic_inc(&skb->users);
243 		}
244 	}
245 	if (*skb2 != NULL) {
246 		if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
247 			skb_orphan(*skb2);
248 			skb_set_owner_r(*skb2, sk);
249 			skb_queue_tail(&sk->sk_receive_queue, *skb2);
250 			sk->sk_data_ready(sk, (*skb2)->len);
251 			*skb2 = NULL;
252 			err = 0;
253 		}
254 	}
255 	sock_put(sk);
256 	return err;
257 }
258 
259 /* Send SKB to all pfkey sockets matching selected criteria.  */
260 #define BROADCAST_ALL		0
261 #define BROADCAST_ONE		1
262 #define BROADCAST_REGISTERED	2
263 #define BROADCAST_PROMISC_ONLY	4
264 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
265 			   int broadcast_flags, struct sock *one_sk,
266 			   struct net *net)
267 {
268 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
269 	struct sock *sk;
270 	struct hlist_node *node;
271 	struct sk_buff *skb2 = NULL;
272 	int err = -ESRCH;
273 
274 	/* XXX Do we need something like netlink_overrun?  I think
275 	 * XXX PF_KEY socket apps will not mind current behavior.
276 	 */
277 	if (!skb)
278 		return -ENOMEM;
279 
280 	pfkey_lock_table();
281 	sk_for_each(sk, node, &net_pfkey->table) {
282 		struct pfkey_sock *pfk = pfkey_sk(sk);
283 		int err2;
284 
285 		/* Yes, it means that if you are meant to receive this
286 		 * pfkey message you receive it twice as promiscuous
287 		 * socket.
288 		 */
289 		if (pfk->promisc)
290 			pfkey_broadcast_one(skb, &skb2, allocation, sk);
291 
292 		/* the exact target will be processed later */
293 		if (sk == one_sk)
294 			continue;
295 		if (broadcast_flags != BROADCAST_ALL) {
296 			if (broadcast_flags & BROADCAST_PROMISC_ONLY)
297 				continue;
298 			if ((broadcast_flags & BROADCAST_REGISTERED) &&
299 			    !pfk->registered)
300 				continue;
301 			if (broadcast_flags & BROADCAST_ONE)
302 				continue;
303 		}
304 
305 		err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
306 
307 		/* Error is cleare after succecful sending to at least one
308 		 * registered KM */
309 		if ((broadcast_flags & BROADCAST_REGISTERED) && err)
310 			err = err2;
311 	}
312 	pfkey_unlock_table();
313 
314 	if (one_sk != NULL)
315 		err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
316 
317 	kfree_skb(skb2);
318 	kfree_skb(skb);
319 	return err;
320 }
321 
322 static int pfkey_do_dump(struct pfkey_sock *pfk)
323 {
324 	struct sadb_msg *hdr;
325 	int rc;
326 
327 	rc = pfk->dump.dump(pfk);
328 	if (rc == -ENOBUFS)
329 		return 0;
330 
331 	if (pfk->dump.skb) {
332 		if (!pfkey_can_dump(&pfk->sk))
333 			return 0;
334 
335 		hdr = (struct sadb_msg *) pfk->dump.skb->data;
336 		hdr->sadb_msg_seq = 0;
337 		hdr->sadb_msg_errno = rc;
338 		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
339 				&pfk->sk, sock_net(&pfk->sk));
340 		pfk->dump.skb = NULL;
341 	}
342 
343 	pfkey_terminate_dump(pfk);
344 	return rc;
345 }
346 
347 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
348 {
349 	*new = *orig;
350 }
351 
352 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
353 {
354 	struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
355 	struct sadb_msg *hdr;
356 
357 	if (!skb)
358 		return -ENOBUFS;
359 
360 	/* Woe be to the platform trying to support PFKEY yet
361 	 * having normal errnos outside the 1-255 range, inclusive.
362 	 */
363 	err = -err;
364 	if (err == ERESTARTSYS ||
365 	    err == ERESTARTNOHAND ||
366 	    err == ERESTARTNOINTR)
367 		err = EINTR;
368 	if (err >= 512)
369 		err = EINVAL;
370 	BUG_ON(err <= 0 || err >= 256);
371 
372 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
373 	pfkey_hdr_dup(hdr, orig);
374 	hdr->sadb_msg_errno = (uint8_t) err;
375 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
376 			     sizeof(uint64_t));
377 
378 	pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
379 
380 	return 0;
381 }
382 
383 static u8 sadb_ext_min_len[] = {
384 	[SADB_EXT_RESERVED]		= (u8) 0,
385 	[SADB_EXT_SA]			= (u8) sizeof(struct sadb_sa),
386 	[SADB_EXT_LIFETIME_CURRENT]	= (u8) sizeof(struct sadb_lifetime),
387 	[SADB_EXT_LIFETIME_HARD]	= (u8) sizeof(struct sadb_lifetime),
388 	[SADB_EXT_LIFETIME_SOFT]	= (u8) sizeof(struct sadb_lifetime),
389 	[SADB_EXT_ADDRESS_SRC]		= (u8) sizeof(struct sadb_address),
390 	[SADB_EXT_ADDRESS_DST]		= (u8) sizeof(struct sadb_address),
391 	[SADB_EXT_ADDRESS_PROXY]	= (u8) sizeof(struct sadb_address),
392 	[SADB_EXT_KEY_AUTH]		= (u8) sizeof(struct sadb_key),
393 	[SADB_EXT_KEY_ENCRYPT]		= (u8) sizeof(struct sadb_key),
394 	[SADB_EXT_IDENTITY_SRC]		= (u8) sizeof(struct sadb_ident),
395 	[SADB_EXT_IDENTITY_DST]		= (u8) sizeof(struct sadb_ident),
396 	[SADB_EXT_SENSITIVITY]		= (u8) sizeof(struct sadb_sens),
397 	[SADB_EXT_PROPOSAL]		= (u8) sizeof(struct sadb_prop),
398 	[SADB_EXT_SUPPORTED_AUTH]	= (u8) sizeof(struct sadb_supported),
399 	[SADB_EXT_SUPPORTED_ENCRYPT]	= (u8) sizeof(struct sadb_supported),
400 	[SADB_EXT_SPIRANGE]		= (u8) sizeof(struct sadb_spirange),
401 	[SADB_X_EXT_KMPRIVATE]		= (u8) sizeof(struct sadb_x_kmprivate),
402 	[SADB_X_EXT_POLICY]		= (u8) sizeof(struct sadb_x_policy),
403 	[SADB_X_EXT_SA2]		= (u8) sizeof(struct sadb_x_sa2),
404 	[SADB_X_EXT_NAT_T_TYPE]		= (u8) sizeof(struct sadb_x_nat_t_type),
405 	[SADB_X_EXT_NAT_T_SPORT]	= (u8) sizeof(struct sadb_x_nat_t_port),
406 	[SADB_X_EXT_NAT_T_DPORT]	= (u8) sizeof(struct sadb_x_nat_t_port),
407 	[SADB_X_EXT_NAT_T_OA]		= (u8) sizeof(struct sadb_address),
408 	[SADB_X_EXT_SEC_CTX]		= (u8) sizeof(struct sadb_x_sec_ctx),
409 	[SADB_X_EXT_KMADDRESS]		= (u8) sizeof(struct sadb_x_kmaddress),
410 };
411 
412 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
413 static int verify_address_len(void *p)
414 {
415 	struct sadb_address *sp = p;
416 	struct sockaddr *addr = (struct sockaddr *)(sp + 1);
417 	struct sockaddr_in *sin;
418 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
419 	struct sockaddr_in6 *sin6;
420 #endif
421 	int len;
422 
423 	switch (addr->sa_family) {
424 	case AF_INET:
425 		len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
426 		if (sp->sadb_address_len != len ||
427 		    sp->sadb_address_prefixlen > 32)
428 			return -EINVAL;
429 		break;
430 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
431 	case AF_INET6:
432 		len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
433 		if (sp->sadb_address_len != len ||
434 		    sp->sadb_address_prefixlen > 128)
435 			return -EINVAL;
436 		break;
437 #endif
438 	default:
439 		/* It is user using kernel to keep track of security
440 		 * associations for another protocol, such as
441 		 * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
442 		 * lengths.
443 		 *
444 		 * XXX Actually, association/policy database is not yet
445 		 * XXX able to cope with arbitrary sockaddr families.
446 		 * XXX When it can, remove this -EINVAL.  -DaveM
447 		 */
448 		return -EINVAL;
449 		break;
450 	}
451 
452 	return 0;
453 }
454 
455 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
456 {
457 	return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
458 			    sec_ctx->sadb_x_ctx_len,
459 			    sizeof(uint64_t));
460 }
461 
462 static inline int verify_sec_ctx_len(void *p)
463 {
464 	struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
465 	int len = sec_ctx->sadb_x_ctx_len;
466 
467 	if (len > PAGE_SIZE)
468 		return -EINVAL;
469 
470 	len = pfkey_sec_ctx_len(sec_ctx);
471 
472 	if (sec_ctx->sadb_x_sec_len != len)
473 		return -EINVAL;
474 
475 	return 0;
476 }
477 
478 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
479 {
480 	struct xfrm_user_sec_ctx *uctx = NULL;
481 	int ctx_size = sec_ctx->sadb_x_ctx_len;
482 
483 	uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
484 
485 	if (!uctx)
486 		return NULL;
487 
488 	uctx->len = pfkey_sec_ctx_len(sec_ctx);
489 	uctx->exttype = sec_ctx->sadb_x_sec_exttype;
490 	uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
491 	uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
492 	uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
493 	memcpy(uctx + 1, sec_ctx + 1,
494 	       uctx->ctx_len);
495 
496 	return uctx;
497 }
498 
499 static int present_and_same_family(struct sadb_address *src,
500 				   struct sadb_address *dst)
501 {
502 	struct sockaddr *s_addr, *d_addr;
503 
504 	if (!src || !dst)
505 		return 0;
506 
507 	s_addr = (struct sockaddr *)(src + 1);
508 	d_addr = (struct sockaddr *)(dst + 1);
509 	if (s_addr->sa_family != d_addr->sa_family)
510 		return 0;
511 	if (s_addr->sa_family != AF_INET
512 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
513 	    && s_addr->sa_family != AF_INET6
514 #endif
515 		)
516 		return 0;
517 
518 	return 1;
519 }
520 
521 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
522 {
523 	char *p = (char *) hdr;
524 	int len = skb->len;
525 
526 	len -= sizeof(*hdr);
527 	p += sizeof(*hdr);
528 	while (len > 0) {
529 		struct sadb_ext *ehdr = (struct sadb_ext *) p;
530 		uint16_t ext_type;
531 		int ext_len;
532 
533 		ext_len  = ehdr->sadb_ext_len;
534 		ext_len *= sizeof(uint64_t);
535 		ext_type = ehdr->sadb_ext_type;
536 		if (ext_len < sizeof(uint64_t) ||
537 		    ext_len > len ||
538 		    ext_type == SADB_EXT_RESERVED)
539 			return -EINVAL;
540 
541 		if (ext_type <= SADB_EXT_MAX) {
542 			int min = (int) sadb_ext_min_len[ext_type];
543 			if (ext_len < min)
544 				return -EINVAL;
545 			if (ext_hdrs[ext_type-1] != NULL)
546 				return -EINVAL;
547 			if (ext_type == SADB_EXT_ADDRESS_SRC ||
548 			    ext_type == SADB_EXT_ADDRESS_DST ||
549 			    ext_type == SADB_EXT_ADDRESS_PROXY ||
550 			    ext_type == SADB_X_EXT_NAT_T_OA) {
551 				if (verify_address_len(p))
552 					return -EINVAL;
553 			}
554 			if (ext_type == SADB_X_EXT_SEC_CTX) {
555 				if (verify_sec_ctx_len(p))
556 					return -EINVAL;
557 			}
558 			ext_hdrs[ext_type-1] = p;
559 		}
560 		p   += ext_len;
561 		len -= ext_len;
562 	}
563 
564 	return 0;
565 }
566 
567 static uint16_t
568 pfkey_satype2proto(uint8_t satype)
569 {
570 	switch (satype) {
571 	case SADB_SATYPE_UNSPEC:
572 		return IPSEC_PROTO_ANY;
573 	case SADB_SATYPE_AH:
574 		return IPPROTO_AH;
575 	case SADB_SATYPE_ESP:
576 		return IPPROTO_ESP;
577 	case SADB_X_SATYPE_IPCOMP:
578 		return IPPROTO_COMP;
579 		break;
580 	default:
581 		return 0;
582 	}
583 	/* NOTREACHED */
584 }
585 
586 static uint8_t
587 pfkey_proto2satype(uint16_t proto)
588 {
589 	switch (proto) {
590 	case IPPROTO_AH:
591 		return SADB_SATYPE_AH;
592 	case IPPROTO_ESP:
593 		return SADB_SATYPE_ESP;
594 	case IPPROTO_COMP:
595 		return SADB_X_SATYPE_IPCOMP;
596 		break;
597 	default:
598 		return 0;
599 	}
600 	/* NOTREACHED */
601 }
602 
603 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
604  * say specifically 'just raw sockets' as we encode them as 255.
605  */
606 
607 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
608 {
609 	return (proto == IPSEC_PROTO_ANY ? 0 : proto);
610 }
611 
612 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
613 {
614 	return (proto ? proto : IPSEC_PROTO_ANY);
615 }
616 
617 static inline int pfkey_sockaddr_len(sa_family_t family)
618 {
619 	switch (family) {
620 	case AF_INET:
621 		return sizeof(struct sockaddr_in);
622 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
623 	case AF_INET6:
624 		return sizeof(struct sockaddr_in6);
625 #endif
626 	}
627 	return 0;
628 }
629 
630 static
631 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
632 {
633 	switch (sa->sa_family) {
634 	case AF_INET:
635 		xaddr->a4 =
636 			((struct sockaddr_in *)sa)->sin_addr.s_addr;
637 		return AF_INET;
638 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
639 	case AF_INET6:
640 		memcpy(xaddr->a6,
641 		       &((struct sockaddr_in6 *)sa)->sin6_addr,
642 		       sizeof(struct in6_addr));
643 		return AF_INET6;
644 #endif
645 	}
646 	return 0;
647 }
648 
649 static
650 int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
651 {
652 	return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
653 				      xaddr);
654 }
655 
656 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct net *net, struct sadb_msg *hdr, void **ext_hdrs)
657 {
658 	struct sadb_sa *sa;
659 	struct sadb_address *addr;
660 	uint16_t proto;
661 	unsigned short family;
662 	xfrm_address_t *xaddr;
663 
664 	sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
665 	if (sa == NULL)
666 		return NULL;
667 
668 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
669 	if (proto == 0)
670 		return NULL;
671 
672 	/* sadb_address_len should be checked by caller */
673 	addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
674 	if (addr == NULL)
675 		return NULL;
676 
677 	family = ((struct sockaddr *)(addr + 1))->sa_family;
678 	switch (family) {
679 	case AF_INET:
680 		xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
681 		break;
682 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
683 	case AF_INET6:
684 		xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
685 		break;
686 #endif
687 	default:
688 		xaddr = NULL;
689 	}
690 
691 	if (!xaddr)
692 		return NULL;
693 
694 	return xfrm_state_lookup(net, xaddr, sa->sadb_sa_spi, proto, family);
695 }
696 
697 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
698 
699 static int
700 pfkey_sockaddr_size(sa_family_t family)
701 {
702 	return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
703 }
704 
705 static inline int pfkey_mode_from_xfrm(int mode)
706 {
707 	switch(mode) {
708 	case XFRM_MODE_TRANSPORT:
709 		return IPSEC_MODE_TRANSPORT;
710 	case XFRM_MODE_TUNNEL:
711 		return IPSEC_MODE_TUNNEL;
712 	case XFRM_MODE_BEET:
713 		return IPSEC_MODE_BEET;
714 	default:
715 		return -1;
716 	}
717 }
718 
719 static inline int pfkey_mode_to_xfrm(int mode)
720 {
721 	switch(mode) {
722 	case IPSEC_MODE_ANY:	/*XXX*/
723 	case IPSEC_MODE_TRANSPORT:
724 		return XFRM_MODE_TRANSPORT;
725 	case IPSEC_MODE_TUNNEL:
726 		return XFRM_MODE_TUNNEL;
727 	case IPSEC_MODE_BEET:
728 		return XFRM_MODE_BEET;
729 	default:
730 		return -1;
731 	}
732 }
733 
734 static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port,
735 				       struct sockaddr *sa,
736 				       unsigned short family)
737 {
738 	switch (family) {
739 	case AF_INET:
740 	    {
741 		struct sockaddr_in *sin = (struct sockaddr_in *)sa;
742 		sin->sin_family = AF_INET;
743 		sin->sin_port = port;
744 		sin->sin_addr.s_addr = xaddr->a4;
745 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
746 		return 32;
747 	    }
748 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
749 	case AF_INET6:
750 	    {
751 		struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
752 		sin6->sin6_family = AF_INET6;
753 		sin6->sin6_port = port;
754 		sin6->sin6_flowinfo = 0;
755 		ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6);
756 		sin6->sin6_scope_id = 0;
757 		return 128;
758 	    }
759 #endif
760 	}
761 	return 0;
762 }
763 
764 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
765 					      int add_keys, int hsc)
766 {
767 	struct sk_buff *skb;
768 	struct sadb_msg *hdr;
769 	struct sadb_sa *sa;
770 	struct sadb_lifetime *lifetime;
771 	struct sadb_address *addr;
772 	struct sadb_key *key;
773 	struct sadb_x_sa2 *sa2;
774 	struct sadb_x_sec_ctx *sec_ctx;
775 	struct xfrm_sec_ctx *xfrm_ctx;
776 	int ctx_size = 0;
777 	int size;
778 	int auth_key_size = 0;
779 	int encrypt_key_size = 0;
780 	int sockaddr_size;
781 	struct xfrm_encap_tmpl *natt = NULL;
782 	int mode;
783 
784 	/* address family check */
785 	sockaddr_size = pfkey_sockaddr_size(x->props.family);
786 	if (!sockaddr_size)
787 		return ERR_PTR(-EINVAL);
788 
789 	/* base, SA, (lifetime (HSC),) address(SD), (address(P),)
790 	   key(AE), (identity(SD),) (sensitivity)> */
791 	size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
792 		sizeof(struct sadb_lifetime) +
793 		((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
794 		((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
795 			sizeof(struct sadb_address)*2 +
796 				sockaddr_size*2 +
797 					sizeof(struct sadb_x_sa2);
798 
799 	if ((xfrm_ctx = x->security)) {
800 		ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
801 		size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
802 	}
803 
804 	/* identity & sensitivity */
805 	if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
806 		size += sizeof(struct sadb_address) + sockaddr_size;
807 
808 	if (add_keys) {
809 		if (x->aalg && x->aalg->alg_key_len) {
810 			auth_key_size =
811 				PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
812 			size += sizeof(struct sadb_key) + auth_key_size;
813 		}
814 		if (x->ealg && x->ealg->alg_key_len) {
815 			encrypt_key_size =
816 				PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
817 			size += sizeof(struct sadb_key) + encrypt_key_size;
818 		}
819 	}
820 	if (x->encap)
821 		natt = x->encap;
822 
823 	if (natt && natt->encap_type) {
824 		size += sizeof(struct sadb_x_nat_t_type);
825 		size += sizeof(struct sadb_x_nat_t_port);
826 		size += sizeof(struct sadb_x_nat_t_port);
827 	}
828 
829 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
830 	if (skb == NULL)
831 		return ERR_PTR(-ENOBUFS);
832 
833 	/* call should fill header later */
834 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
835 	memset(hdr, 0, size);	/* XXX do we need this ? */
836 	hdr->sadb_msg_len = size / sizeof(uint64_t);
837 
838 	/* sa */
839 	sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
840 	sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
841 	sa->sadb_sa_exttype = SADB_EXT_SA;
842 	sa->sadb_sa_spi = x->id.spi;
843 	sa->sadb_sa_replay = x->props.replay_window;
844 	switch (x->km.state) {
845 	case XFRM_STATE_VALID:
846 		sa->sadb_sa_state = x->km.dying ?
847 			SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
848 		break;
849 	case XFRM_STATE_ACQ:
850 		sa->sadb_sa_state = SADB_SASTATE_LARVAL;
851 		break;
852 	default:
853 		sa->sadb_sa_state = SADB_SASTATE_DEAD;
854 		break;
855 	}
856 	sa->sadb_sa_auth = 0;
857 	if (x->aalg) {
858 		struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
859 		sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
860 	}
861 	sa->sadb_sa_encrypt = 0;
862 	BUG_ON(x->ealg && x->calg);
863 	if (x->ealg) {
864 		struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
865 		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
866 	}
867 	/* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
868 	if (x->calg) {
869 		struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
870 		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
871 	}
872 
873 	sa->sadb_sa_flags = 0;
874 	if (x->props.flags & XFRM_STATE_NOECN)
875 		sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
876 	if (x->props.flags & XFRM_STATE_DECAP_DSCP)
877 		sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
878 	if (x->props.flags & XFRM_STATE_NOPMTUDISC)
879 		sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
880 
881 	/* hard time */
882 	if (hsc & 2) {
883 		lifetime = (struct sadb_lifetime *)  skb_put(skb,
884 							     sizeof(struct sadb_lifetime));
885 		lifetime->sadb_lifetime_len =
886 			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
887 		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
888 		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
889 		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
890 		lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
891 		lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
892 	}
893 	/* soft time */
894 	if (hsc & 1) {
895 		lifetime = (struct sadb_lifetime *)  skb_put(skb,
896 							     sizeof(struct sadb_lifetime));
897 		lifetime->sadb_lifetime_len =
898 			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
899 		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
900 		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
901 		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
902 		lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
903 		lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
904 	}
905 	/* current time */
906 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
907 						     sizeof(struct sadb_lifetime));
908 	lifetime->sadb_lifetime_len =
909 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
910 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
911 	lifetime->sadb_lifetime_allocations = x->curlft.packets;
912 	lifetime->sadb_lifetime_bytes = x->curlft.bytes;
913 	lifetime->sadb_lifetime_addtime = x->curlft.add_time;
914 	lifetime->sadb_lifetime_usetime = x->curlft.use_time;
915 	/* src address */
916 	addr = (struct sadb_address*) skb_put(skb,
917 					      sizeof(struct sadb_address)+sockaddr_size);
918 	addr->sadb_address_len =
919 		(sizeof(struct sadb_address)+sockaddr_size)/
920 			sizeof(uint64_t);
921 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
922 	/* "if the ports are non-zero, then the sadb_address_proto field,
923 	   normally zero, MUST be filled in with the transport
924 	   protocol's number." - RFC2367 */
925 	addr->sadb_address_proto = 0;
926 	addr->sadb_address_reserved = 0;
927 
928 	addr->sadb_address_prefixlen =
929 		pfkey_sockaddr_fill(&x->props.saddr, 0,
930 				    (struct sockaddr *) (addr + 1),
931 				    x->props.family);
932 	if (!addr->sadb_address_prefixlen)
933 		BUG();
934 
935 	/* dst address */
936 	addr = (struct sadb_address*) skb_put(skb,
937 					      sizeof(struct sadb_address)+sockaddr_size);
938 	addr->sadb_address_len =
939 		(sizeof(struct sadb_address)+sockaddr_size)/
940 			sizeof(uint64_t);
941 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
942 	addr->sadb_address_proto = 0;
943 	addr->sadb_address_reserved = 0;
944 
945 	addr->sadb_address_prefixlen =
946 		pfkey_sockaddr_fill(&x->id.daddr, 0,
947 				    (struct sockaddr *) (addr + 1),
948 				    x->props.family);
949 	if (!addr->sadb_address_prefixlen)
950 		BUG();
951 
952 	if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
953 			  x->props.family)) {
954 		addr = (struct sadb_address*) skb_put(skb,
955 			sizeof(struct sadb_address)+sockaddr_size);
956 		addr->sadb_address_len =
957 			(sizeof(struct sadb_address)+sockaddr_size)/
958 			sizeof(uint64_t);
959 		addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
960 		addr->sadb_address_proto =
961 			pfkey_proto_from_xfrm(x->sel.proto);
962 		addr->sadb_address_prefixlen = x->sel.prefixlen_s;
963 		addr->sadb_address_reserved = 0;
964 
965 		pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
966 				    (struct sockaddr *) (addr + 1),
967 				    x->props.family);
968 	}
969 
970 	/* auth key */
971 	if (add_keys && auth_key_size) {
972 		key = (struct sadb_key *) skb_put(skb,
973 						  sizeof(struct sadb_key)+auth_key_size);
974 		key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
975 			sizeof(uint64_t);
976 		key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
977 		key->sadb_key_bits = x->aalg->alg_key_len;
978 		key->sadb_key_reserved = 0;
979 		memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
980 	}
981 	/* encrypt key */
982 	if (add_keys && encrypt_key_size) {
983 		key = (struct sadb_key *) skb_put(skb,
984 						  sizeof(struct sadb_key)+encrypt_key_size);
985 		key->sadb_key_len = (sizeof(struct sadb_key) +
986 				     encrypt_key_size) / sizeof(uint64_t);
987 		key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
988 		key->sadb_key_bits = x->ealg->alg_key_len;
989 		key->sadb_key_reserved = 0;
990 		memcpy(key + 1, x->ealg->alg_key,
991 		       (x->ealg->alg_key_len+7)/8);
992 	}
993 
994 	/* sa */
995 	sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
996 	sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
997 	sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
998 	if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
999 		kfree_skb(skb);
1000 		return ERR_PTR(-EINVAL);
1001 	}
1002 	sa2->sadb_x_sa2_mode = mode;
1003 	sa2->sadb_x_sa2_reserved1 = 0;
1004 	sa2->sadb_x_sa2_reserved2 = 0;
1005 	sa2->sadb_x_sa2_sequence = 0;
1006 	sa2->sadb_x_sa2_reqid = x->props.reqid;
1007 
1008 	if (natt && natt->encap_type) {
1009 		struct sadb_x_nat_t_type *n_type;
1010 		struct sadb_x_nat_t_port *n_port;
1011 
1012 		/* type */
1013 		n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
1014 		n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1015 		n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1016 		n_type->sadb_x_nat_t_type_type = natt->encap_type;
1017 		n_type->sadb_x_nat_t_type_reserved[0] = 0;
1018 		n_type->sadb_x_nat_t_type_reserved[1] = 0;
1019 		n_type->sadb_x_nat_t_type_reserved[2] = 0;
1020 
1021 		/* source port */
1022 		n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1023 		n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1024 		n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1025 		n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1026 		n_port->sadb_x_nat_t_port_reserved = 0;
1027 
1028 		/* dest port */
1029 		n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1030 		n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1031 		n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1032 		n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1033 		n_port->sadb_x_nat_t_port_reserved = 0;
1034 	}
1035 
1036 	/* security context */
1037 	if (xfrm_ctx) {
1038 		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1039 				sizeof(struct sadb_x_sec_ctx) + ctx_size);
1040 		sec_ctx->sadb_x_sec_len =
1041 		  (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1042 		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1043 		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1044 		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1045 		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1046 		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1047 		       xfrm_ctx->ctx_len);
1048 	}
1049 
1050 	return skb;
1051 }
1052 
1053 
1054 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1055 {
1056 	struct sk_buff *skb;
1057 
1058 	skb = __pfkey_xfrm_state2msg(x, 1, 3);
1059 
1060 	return skb;
1061 }
1062 
1063 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1064 							  int hsc)
1065 {
1066 	return __pfkey_xfrm_state2msg(x, 0, hsc);
1067 }
1068 
1069 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1070 						struct sadb_msg *hdr,
1071 						void **ext_hdrs)
1072 {
1073 	struct xfrm_state *x;
1074 	struct sadb_lifetime *lifetime;
1075 	struct sadb_sa *sa;
1076 	struct sadb_key *key;
1077 	struct sadb_x_sec_ctx *sec_ctx;
1078 	uint16_t proto;
1079 	int err;
1080 
1081 
1082 	sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1083 	if (!sa ||
1084 	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1085 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1086 		return ERR_PTR(-EINVAL);
1087 	if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1088 	    !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1089 		return ERR_PTR(-EINVAL);
1090 	if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1091 	    !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1092 		return ERR_PTR(-EINVAL);
1093 	if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1094 	    !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1095 		return ERR_PTR(-EINVAL);
1096 
1097 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1098 	if (proto == 0)
1099 		return ERR_PTR(-EINVAL);
1100 
1101 	/* default error is no buffer space */
1102 	err = -ENOBUFS;
1103 
1104 	/* RFC2367:
1105 
1106    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1107    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1108    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1109    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1110    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1111    not true.
1112 
1113 	   However, KAME setkey always uses SADB_SASTATE_LARVAL.
1114 	   Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1115 	 */
1116 	if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1117 	    (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1118 	     sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1119 	    sa->sadb_sa_encrypt > SADB_EALG_MAX)
1120 		return ERR_PTR(-EINVAL);
1121 	key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1122 	if (key != NULL &&
1123 	    sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1124 	    ((key->sadb_key_bits+7) / 8 == 0 ||
1125 	     (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1126 		return ERR_PTR(-EINVAL);
1127 	key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1128 	if (key != NULL &&
1129 	    sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1130 	    ((key->sadb_key_bits+7) / 8 == 0 ||
1131 	     (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1132 		return ERR_PTR(-EINVAL);
1133 
1134 	x = xfrm_state_alloc(net);
1135 	if (x == NULL)
1136 		return ERR_PTR(-ENOBUFS);
1137 
1138 	x->id.proto = proto;
1139 	x->id.spi = sa->sadb_sa_spi;
1140 	x->props.replay_window = sa->sadb_sa_replay;
1141 	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1142 		x->props.flags |= XFRM_STATE_NOECN;
1143 	if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1144 		x->props.flags |= XFRM_STATE_DECAP_DSCP;
1145 	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1146 		x->props.flags |= XFRM_STATE_NOPMTUDISC;
1147 
1148 	lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1149 	if (lifetime != NULL) {
1150 		x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1151 		x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1152 		x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1153 		x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1154 	}
1155 	lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1156 	if (lifetime != NULL) {
1157 		x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1158 		x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1159 		x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1160 		x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1161 	}
1162 
1163 	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1164 	if (sec_ctx != NULL) {
1165 		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1166 
1167 		if (!uctx)
1168 			goto out;
1169 
1170 		err = security_xfrm_state_alloc(x, uctx);
1171 		kfree(uctx);
1172 
1173 		if (err)
1174 			goto out;
1175 	}
1176 
1177 	key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1178 	if (sa->sadb_sa_auth) {
1179 		int keysize = 0;
1180 		struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1181 		if (!a) {
1182 			err = -ENOSYS;
1183 			goto out;
1184 		}
1185 		if (key)
1186 			keysize = (key->sadb_key_bits + 7) / 8;
1187 		x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1188 		if (!x->aalg)
1189 			goto out;
1190 		strcpy(x->aalg->alg_name, a->name);
1191 		x->aalg->alg_key_len = 0;
1192 		if (key) {
1193 			x->aalg->alg_key_len = key->sadb_key_bits;
1194 			memcpy(x->aalg->alg_key, key+1, keysize);
1195 		}
1196 		x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1197 		x->props.aalgo = sa->sadb_sa_auth;
1198 		/* x->algo.flags = sa->sadb_sa_flags; */
1199 	}
1200 	if (sa->sadb_sa_encrypt) {
1201 		if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1202 			struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1203 			if (!a) {
1204 				err = -ENOSYS;
1205 				goto out;
1206 			}
1207 			x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1208 			if (!x->calg)
1209 				goto out;
1210 			strcpy(x->calg->alg_name, a->name);
1211 			x->props.calgo = sa->sadb_sa_encrypt;
1212 		} else {
1213 			int keysize = 0;
1214 			struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1215 			if (!a) {
1216 				err = -ENOSYS;
1217 				goto out;
1218 			}
1219 			key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1220 			if (key)
1221 				keysize = (key->sadb_key_bits + 7) / 8;
1222 			x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1223 			if (!x->ealg)
1224 				goto out;
1225 			strcpy(x->ealg->alg_name, a->name);
1226 			x->ealg->alg_key_len = 0;
1227 			if (key) {
1228 				x->ealg->alg_key_len = key->sadb_key_bits;
1229 				memcpy(x->ealg->alg_key, key+1, keysize);
1230 			}
1231 			x->props.ealgo = sa->sadb_sa_encrypt;
1232 		}
1233 	}
1234 	/* x->algo.flags = sa->sadb_sa_flags; */
1235 
1236 	x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1237 						    &x->props.saddr);
1238 	if (!x->props.family) {
1239 		err = -EAFNOSUPPORT;
1240 		goto out;
1241 	}
1242 	pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1243 				  &x->id.daddr);
1244 
1245 	if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1246 		struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1247 		int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1248 		if (mode < 0) {
1249 			err = -EINVAL;
1250 			goto out;
1251 		}
1252 		x->props.mode = mode;
1253 		x->props.reqid = sa2->sadb_x_sa2_reqid;
1254 	}
1255 
1256 	if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1257 		struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1258 
1259 		/* Nobody uses this, but we try. */
1260 		x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1261 		x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1262 	}
1263 
1264 	if (!x->sel.family)
1265 		x->sel.family = x->props.family;
1266 
1267 	if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1268 		struct sadb_x_nat_t_type* n_type;
1269 		struct xfrm_encap_tmpl *natt;
1270 
1271 		x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1272 		if (!x->encap)
1273 			goto out;
1274 
1275 		natt = x->encap;
1276 		n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1277 		natt->encap_type = n_type->sadb_x_nat_t_type_type;
1278 
1279 		if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1280 			struct sadb_x_nat_t_port* n_port =
1281 				ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1282 			natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1283 		}
1284 		if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1285 			struct sadb_x_nat_t_port* n_port =
1286 				ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1287 			natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1288 		}
1289 		memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1290 	}
1291 
1292 	err = xfrm_init_state(x);
1293 	if (err)
1294 		goto out;
1295 
1296 	x->km.seq = hdr->sadb_msg_seq;
1297 	return x;
1298 
1299 out:
1300 	x->km.state = XFRM_STATE_DEAD;
1301 	xfrm_state_put(x);
1302 	return ERR_PTR(err);
1303 }
1304 
1305 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1306 {
1307 	return -EOPNOTSUPP;
1308 }
1309 
1310 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1311 {
1312 	struct net *net = sock_net(sk);
1313 	struct sk_buff *resp_skb;
1314 	struct sadb_x_sa2 *sa2;
1315 	struct sadb_address *saddr, *daddr;
1316 	struct sadb_msg *out_hdr;
1317 	struct sadb_spirange *range;
1318 	struct xfrm_state *x = NULL;
1319 	int mode;
1320 	int err;
1321 	u32 min_spi, max_spi;
1322 	u32 reqid;
1323 	u8 proto;
1324 	unsigned short family;
1325 	xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1326 
1327 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1328 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1329 		return -EINVAL;
1330 
1331 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1332 	if (proto == 0)
1333 		return -EINVAL;
1334 
1335 	if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1336 		mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1337 		if (mode < 0)
1338 			return -EINVAL;
1339 		reqid = sa2->sadb_x_sa2_reqid;
1340 	} else {
1341 		mode = 0;
1342 		reqid = 0;
1343 	}
1344 
1345 	saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1346 	daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1347 
1348 	family = ((struct sockaddr *)(saddr + 1))->sa_family;
1349 	switch (family) {
1350 	case AF_INET:
1351 		xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1352 		xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1353 		break;
1354 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1355 	case AF_INET6:
1356 		xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1357 		xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1358 		break;
1359 #endif
1360 	}
1361 
1362 	if (hdr->sadb_msg_seq) {
1363 		x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
1364 		if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1365 			xfrm_state_put(x);
1366 			x = NULL;
1367 		}
1368 	}
1369 
1370 	if (!x)
1371 		x = xfrm_find_acq(net, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1372 
1373 	if (x == NULL)
1374 		return -ENOENT;
1375 
1376 	min_spi = 0x100;
1377 	max_spi = 0x0fffffff;
1378 
1379 	range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1380 	if (range) {
1381 		min_spi = range->sadb_spirange_min;
1382 		max_spi = range->sadb_spirange_max;
1383 	}
1384 
1385 	err = xfrm_alloc_spi(x, min_spi, max_spi);
1386 	resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1387 
1388 	if (IS_ERR(resp_skb)) {
1389 		xfrm_state_put(x);
1390 		return  PTR_ERR(resp_skb);
1391 	}
1392 
1393 	out_hdr = (struct sadb_msg *) resp_skb->data;
1394 	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1395 	out_hdr->sadb_msg_type = SADB_GETSPI;
1396 	out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1397 	out_hdr->sadb_msg_errno = 0;
1398 	out_hdr->sadb_msg_reserved = 0;
1399 	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1400 	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1401 
1402 	xfrm_state_put(x);
1403 
1404 	pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1405 
1406 	return 0;
1407 }
1408 
1409 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1410 {
1411 	struct net *net = sock_net(sk);
1412 	struct xfrm_state *x;
1413 
1414 	if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1415 		return -EOPNOTSUPP;
1416 
1417 	if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1418 		return 0;
1419 
1420 	x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
1421 	if (x == NULL)
1422 		return 0;
1423 
1424 	spin_lock_bh(&x->lock);
1425 	if (x->km.state == XFRM_STATE_ACQ) {
1426 		x->km.state = XFRM_STATE_ERROR;
1427 		wake_up(&net->xfrm.km_waitq);
1428 	}
1429 	spin_unlock_bh(&x->lock);
1430 	xfrm_state_put(x);
1431 	return 0;
1432 }
1433 
1434 static inline int event2poltype(int event)
1435 {
1436 	switch (event) {
1437 	case XFRM_MSG_DELPOLICY:
1438 		return SADB_X_SPDDELETE;
1439 	case XFRM_MSG_NEWPOLICY:
1440 		return SADB_X_SPDADD;
1441 	case XFRM_MSG_UPDPOLICY:
1442 		return SADB_X_SPDUPDATE;
1443 	case XFRM_MSG_POLEXPIRE:
1444 	//	return SADB_X_SPDEXPIRE;
1445 	default:
1446 		printk("pfkey: Unknown policy event %d\n", event);
1447 		break;
1448 	}
1449 
1450 	return 0;
1451 }
1452 
1453 static inline int event2keytype(int event)
1454 {
1455 	switch (event) {
1456 	case XFRM_MSG_DELSA:
1457 		return SADB_DELETE;
1458 	case XFRM_MSG_NEWSA:
1459 		return SADB_ADD;
1460 	case XFRM_MSG_UPDSA:
1461 		return SADB_UPDATE;
1462 	case XFRM_MSG_EXPIRE:
1463 		return SADB_EXPIRE;
1464 	default:
1465 		printk("pfkey: Unknown SA event %d\n", event);
1466 		break;
1467 	}
1468 
1469 	return 0;
1470 }
1471 
1472 /* ADD/UPD/DEL */
1473 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1474 {
1475 	struct sk_buff *skb;
1476 	struct sadb_msg *hdr;
1477 
1478 	skb = pfkey_xfrm_state2msg(x);
1479 
1480 	if (IS_ERR(skb))
1481 		return PTR_ERR(skb);
1482 
1483 	hdr = (struct sadb_msg *) skb->data;
1484 	hdr->sadb_msg_version = PF_KEY_V2;
1485 	hdr->sadb_msg_type = event2keytype(c->event);
1486 	hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1487 	hdr->sadb_msg_errno = 0;
1488 	hdr->sadb_msg_reserved = 0;
1489 	hdr->sadb_msg_seq = c->seq;
1490 	hdr->sadb_msg_pid = c->pid;
1491 
1492 	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1493 
1494 	return 0;
1495 }
1496 
1497 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1498 {
1499 	struct net *net = sock_net(sk);
1500 	struct xfrm_state *x;
1501 	int err;
1502 	struct km_event c;
1503 
1504 	x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1505 	if (IS_ERR(x))
1506 		return PTR_ERR(x);
1507 
1508 	xfrm_state_hold(x);
1509 	if (hdr->sadb_msg_type == SADB_ADD)
1510 		err = xfrm_state_add(x);
1511 	else
1512 		err = xfrm_state_update(x);
1513 
1514 	xfrm_audit_state_add(x, err ? 0 : 1,
1515 			     audit_get_loginuid(current),
1516 			     audit_get_sessionid(current), 0);
1517 
1518 	if (err < 0) {
1519 		x->km.state = XFRM_STATE_DEAD;
1520 		__xfrm_state_put(x);
1521 		goto out;
1522 	}
1523 
1524 	if (hdr->sadb_msg_type == SADB_ADD)
1525 		c.event = XFRM_MSG_NEWSA;
1526 	else
1527 		c.event = XFRM_MSG_UPDSA;
1528 	c.seq = hdr->sadb_msg_seq;
1529 	c.pid = hdr->sadb_msg_pid;
1530 	km_state_notify(x, &c);
1531 out:
1532 	xfrm_state_put(x);
1533 	return err;
1534 }
1535 
1536 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1537 {
1538 	struct net *net = sock_net(sk);
1539 	struct xfrm_state *x;
1540 	struct km_event c;
1541 	int err;
1542 
1543 	if (!ext_hdrs[SADB_EXT_SA-1] ||
1544 	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1545 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1546 		return -EINVAL;
1547 
1548 	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1549 	if (x == NULL)
1550 		return -ESRCH;
1551 
1552 	if ((err = security_xfrm_state_delete(x)))
1553 		goto out;
1554 
1555 	if (xfrm_state_kern(x)) {
1556 		err = -EPERM;
1557 		goto out;
1558 	}
1559 
1560 	err = xfrm_state_delete(x);
1561 
1562 	if (err < 0)
1563 		goto out;
1564 
1565 	c.seq = hdr->sadb_msg_seq;
1566 	c.pid = hdr->sadb_msg_pid;
1567 	c.event = XFRM_MSG_DELSA;
1568 	km_state_notify(x, &c);
1569 out:
1570 	xfrm_audit_state_delete(x, err ? 0 : 1,
1571 				audit_get_loginuid(current),
1572 				audit_get_sessionid(current), 0);
1573 	xfrm_state_put(x);
1574 
1575 	return err;
1576 }
1577 
1578 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1579 {
1580 	struct net *net = sock_net(sk);
1581 	__u8 proto;
1582 	struct sk_buff *out_skb;
1583 	struct sadb_msg *out_hdr;
1584 	struct xfrm_state *x;
1585 
1586 	if (!ext_hdrs[SADB_EXT_SA-1] ||
1587 	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1588 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1589 		return -EINVAL;
1590 
1591 	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1592 	if (x == NULL)
1593 		return -ESRCH;
1594 
1595 	out_skb = pfkey_xfrm_state2msg(x);
1596 	proto = x->id.proto;
1597 	xfrm_state_put(x);
1598 	if (IS_ERR(out_skb))
1599 		return  PTR_ERR(out_skb);
1600 
1601 	out_hdr = (struct sadb_msg *) out_skb->data;
1602 	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1603 	out_hdr->sadb_msg_type = SADB_GET;
1604 	out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1605 	out_hdr->sadb_msg_errno = 0;
1606 	out_hdr->sadb_msg_reserved = 0;
1607 	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1608 	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1609 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1610 
1611 	return 0;
1612 }
1613 
1614 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1615 					      gfp_t allocation)
1616 {
1617 	struct sk_buff *skb;
1618 	struct sadb_msg *hdr;
1619 	int len, auth_len, enc_len, i;
1620 
1621 	auth_len = xfrm_count_auth_supported();
1622 	if (auth_len) {
1623 		auth_len *= sizeof(struct sadb_alg);
1624 		auth_len += sizeof(struct sadb_supported);
1625 	}
1626 
1627 	enc_len = xfrm_count_enc_supported();
1628 	if (enc_len) {
1629 		enc_len *= sizeof(struct sadb_alg);
1630 		enc_len += sizeof(struct sadb_supported);
1631 	}
1632 
1633 	len = enc_len + auth_len + sizeof(struct sadb_msg);
1634 
1635 	skb = alloc_skb(len + 16, allocation);
1636 	if (!skb)
1637 		goto out_put_algs;
1638 
1639 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1640 	pfkey_hdr_dup(hdr, orig);
1641 	hdr->sadb_msg_errno = 0;
1642 	hdr->sadb_msg_len = len / sizeof(uint64_t);
1643 
1644 	if (auth_len) {
1645 		struct sadb_supported *sp;
1646 		struct sadb_alg *ap;
1647 
1648 		sp = (struct sadb_supported *) skb_put(skb, auth_len);
1649 		ap = (struct sadb_alg *) (sp + 1);
1650 
1651 		sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1652 		sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1653 
1654 		for (i = 0; ; i++) {
1655 			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1656 			if (!aalg)
1657 				break;
1658 			if (aalg->available)
1659 				*ap++ = aalg->desc;
1660 		}
1661 	}
1662 
1663 	if (enc_len) {
1664 		struct sadb_supported *sp;
1665 		struct sadb_alg *ap;
1666 
1667 		sp = (struct sadb_supported *) skb_put(skb, enc_len);
1668 		ap = (struct sadb_alg *) (sp + 1);
1669 
1670 		sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1671 		sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1672 
1673 		for (i = 0; ; i++) {
1674 			struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1675 			if (!ealg)
1676 				break;
1677 			if (ealg->available)
1678 				*ap++ = ealg->desc;
1679 		}
1680 	}
1681 
1682 out_put_algs:
1683 	return skb;
1684 }
1685 
1686 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1687 {
1688 	struct pfkey_sock *pfk = pfkey_sk(sk);
1689 	struct sk_buff *supp_skb;
1690 
1691 	if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1692 		return -EINVAL;
1693 
1694 	if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1695 		if (pfk->registered&(1<<hdr->sadb_msg_satype))
1696 			return -EEXIST;
1697 		pfk->registered |= (1<<hdr->sadb_msg_satype);
1698 	}
1699 
1700 	xfrm_probe_algs();
1701 
1702 	supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1703 	if (!supp_skb) {
1704 		if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1705 			pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1706 
1707 		return -ENOBUFS;
1708 	}
1709 
1710 	pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
1711 
1712 	return 0;
1713 }
1714 
1715 static int key_notify_sa_flush(struct km_event *c)
1716 {
1717 	struct sk_buff *skb;
1718 	struct sadb_msg *hdr;
1719 
1720 	skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1721 	if (!skb)
1722 		return -ENOBUFS;
1723 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1724 	hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1725 	hdr->sadb_msg_type = SADB_FLUSH;
1726 	hdr->sadb_msg_seq = c->seq;
1727 	hdr->sadb_msg_pid = c->pid;
1728 	hdr->sadb_msg_version = PF_KEY_V2;
1729 	hdr->sadb_msg_errno = (uint8_t) 0;
1730 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1731 
1732 	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1733 
1734 	return 0;
1735 }
1736 
1737 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1738 {
1739 	struct net *net = sock_net(sk);
1740 	unsigned proto;
1741 	struct km_event c;
1742 	struct xfrm_audit audit_info;
1743 	int err;
1744 
1745 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1746 	if (proto == 0)
1747 		return -EINVAL;
1748 
1749 	audit_info.loginuid = audit_get_loginuid(current);
1750 	audit_info.sessionid = audit_get_sessionid(current);
1751 	audit_info.secid = 0;
1752 	err = xfrm_state_flush(net, proto, &audit_info);
1753 	if (err)
1754 		return err;
1755 	c.data.proto = proto;
1756 	c.seq = hdr->sadb_msg_seq;
1757 	c.pid = hdr->sadb_msg_pid;
1758 	c.event = XFRM_MSG_FLUSHSA;
1759 	c.net = net;
1760 	km_state_notify(NULL, &c);
1761 
1762 	return 0;
1763 }
1764 
1765 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1766 {
1767 	struct pfkey_sock *pfk = ptr;
1768 	struct sk_buff *out_skb;
1769 	struct sadb_msg *out_hdr;
1770 
1771 	if (!pfkey_can_dump(&pfk->sk))
1772 		return -ENOBUFS;
1773 
1774 	out_skb = pfkey_xfrm_state2msg(x);
1775 	if (IS_ERR(out_skb))
1776 		return PTR_ERR(out_skb);
1777 
1778 	out_hdr = (struct sadb_msg *) out_skb->data;
1779 	out_hdr->sadb_msg_version = pfk->dump.msg_version;
1780 	out_hdr->sadb_msg_type = SADB_DUMP;
1781 	out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1782 	out_hdr->sadb_msg_errno = 0;
1783 	out_hdr->sadb_msg_reserved = 0;
1784 	out_hdr->sadb_msg_seq = count + 1;
1785 	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
1786 
1787 	if (pfk->dump.skb)
1788 		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1789 				&pfk->sk, sock_net(&pfk->sk));
1790 	pfk->dump.skb = out_skb;
1791 
1792 	return 0;
1793 }
1794 
1795 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1796 {
1797 	struct net *net = sock_net(&pfk->sk);
1798 	return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1799 }
1800 
1801 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1802 {
1803 	xfrm_state_walk_done(&pfk->dump.u.state);
1804 }
1805 
1806 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1807 {
1808 	u8 proto;
1809 	struct pfkey_sock *pfk = pfkey_sk(sk);
1810 
1811 	if (pfk->dump.dump != NULL)
1812 		return -EBUSY;
1813 
1814 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1815 	if (proto == 0)
1816 		return -EINVAL;
1817 
1818 	pfk->dump.msg_version = hdr->sadb_msg_version;
1819 	pfk->dump.msg_pid = hdr->sadb_msg_pid;
1820 	pfk->dump.dump = pfkey_dump_sa;
1821 	pfk->dump.done = pfkey_dump_sa_done;
1822 	xfrm_state_walk_init(&pfk->dump.u.state, proto);
1823 
1824 	return pfkey_do_dump(pfk);
1825 }
1826 
1827 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1828 {
1829 	struct pfkey_sock *pfk = pfkey_sk(sk);
1830 	int satype = hdr->sadb_msg_satype;
1831 
1832 	if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1833 		/* XXX we mangle packet... */
1834 		hdr->sadb_msg_errno = 0;
1835 		if (satype != 0 && satype != 1)
1836 			return -EINVAL;
1837 		pfk->promisc = satype;
1838 	}
1839 	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1840 	return 0;
1841 }
1842 
1843 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1844 {
1845 	int i;
1846 	u32 reqid = *(u32*)ptr;
1847 
1848 	for (i=0; i<xp->xfrm_nr; i++) {
1849 		if (xp->xfrm_vec[i].reqid == reqid)
1850 			return -EEXIST;
1851 	}
1852 	return 0;
1853 }
1854 
1855 static u32 gen_reqid(struct net *net)
1856 {
1857 	struct xfrm_policy_walk walk;
1858 	u32 start;
1859 	int rc;
1860 	static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1861 
1862 	start = reqid;
1863 	do {
1864 		++reqid;
1865 		if (reqid == 0)
1866 			reqid = IPSEC_MANUAL_REQID_MAX+1;
1867 		xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1868 		rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1869 		xfrm_policy_walk_done(&walk);
1870 		if (rc != -EEXIST)
1871 			return reqid;
1872 	} while (reqid != start);
1873 	return 0;
1874 }
1875 
1876 static int
1877 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1878 {
1879 	struct net *net = xp_net(xp);
1880 	struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1881 	int mode;
1882 
1883 	if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1884 		return -ELOOP;
1885 
1886 	if (rq->sadb_x_ipsecrequest_mode == 0)
1887 		return -EINVAL;
1888 
1889 	t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1890 	if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1891 		return -EINVAL;
1892 	t->mode = mode;
1893 	if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1894 		t->optional = 1;
1895 	else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1896 		t->reqid = rq->sadb_x_ipsecrequest_reqid;
1897 		if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1898 			t->reqid = 0;
1899 		if (!t->reqid && !(t->reqid = gen_reqid(net)))
1900 			return -ENOBUFS;
1901 	}
1902 
1903 	/* addresses present only in tunnel mode */
1904 	if (t->mode == XFRM_MODE_TUNNEL) {
1905 		u8 *sa = (u8 *) (rq + 1);
1906 		int family, socklen;
1907 
1908 		family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1909 						&t->saddr);
1910 		if (!family)
1911 			return -EINVAL;
1912 
1913 		socklen = pfkey_sockaddr_len(family);
1914 		if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1915 					   &t->id.daddr) != family)
1916 			return -EINVAL;
1917 		t->encap_family = family;
1918 	} else
1919 		t->encap_family = xp->family;
1920 
1921 	/* No way to set this via kame pfkey */
1922 	t->allalgs = 1;
1923 	xp->xfrm_nr++;
1924 	return 0;
1925 }
1926 
1927 static int
1928 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1929 {
1930 	int err;
1931 	int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1932 	struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1933 
1934 	while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1935 		if ((err = parse_ipsecrequest(xp, rq)) < 0)
1936 			return err;
1937 		len -= rq->sadb_x_ipsecrequest_len;
1938 		rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1939 	}
1940 	return 0;
1941 }
1942 
1943 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1944 {
1945   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1946 
1947 	if (xfrm_ctx) {
1948 		int len = sizeof(struct sadb_x_sec_ctx);
1949 		len += xfrm_ctx->ctx_len;
1950 		return PFKEY_ALIGN8(len);
1951 	}
1952 	return 0;
1953 }
1954 
1955 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1956 {
1957 	struct xfrm_tmpl *t;
1958 	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1959 	int socklen = 0;
1960 	int i;
1961 
1962 	for (i=0; i<xp->xfrm_nr; i++) {
1963 		t = xp->xfrm_vec + i;
1964 		socklen += pfkey_sockaddr_len(t->encap_family);
1965 	}
1966 
1967 	return sizeof(struct sadb_msg) +
1968 		(sizeof(struct sadb_lifetime) * 3) +
1969 		(sizeof(struct sadb_address) * 2) +
1970 		(sockaddr_size * 2) +
1971 		sizeof(struct sadb_x_policy) +
1972 		(xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1973 		(socklen * 2) +
1974 		pfkey_xfrm_policy2sec_ctx_size(xp);
1975 }
1976 
1977 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1978 {
1979 	struct sk_buff *skb;
1980 	int size;
1981 
1982 	size = pfkey_xfrm_policy2msg_size(xp);
1983 
1984 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
1985 	if (skb == NULL)
1986 		return ERR_PTR(-ENOBUFS);
1987 
1988 	return skb;
1989 }
1990 
1991 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1992 {
1993 	struct sadb_msg *hdr;
1994 	struct sadb_address *addr;
1995 	struct sadb_lifetime *lifetime;
1996 	struct sadb_x_policy *pol;
1997 	struct sadb_x_sec_ctx *sec_ctx;
1998 	struct xfrm_sec_ctx *xfrm_ctx;
1999 	int i;
2000 	int size;
2001 	int sockaddr_size = pfkey_sockaddr_size(xp->family);
2002 	int socklen = pfkey_sockaddr_len(xp->family);
2003 
2004 	size = pfkey_xfrm_policy2msg_size(xp);
2005 
2006 	/* call should fill header later */
2007 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2008 	memset(hdr, 0, size);	/* XXX do we need this ? */
2009 
2010 	/* src address */
2011 	addr = (struct sadb_address*) skb_put(skb,
2012 					      sizeof(struct sadb_address)+sockaddr_size);
2013 	addr->sadb_address_len =
2014 		(sizeof(struct sadb_address)+sockaddr_size)/
2015 			sizeof(uint64_t);
2016 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2017 	addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2018 	addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2019 	addr->sadb_address_reserved = 0;
2020 	if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2021 				 xp->selector.sport,
2022 				 (struct sockaddr *) (addr + 1),
2023 				 xp->family))
2024 		BUG();
2025 
2026 	/* dst address */
2027 	addr = (struct sadb_address*) skb_put(skb,
2028 					      sizeof(struct sadb_address)+sockaddr_size);
2029 	addr->sadb_address_len =
2030 		(sizeof(struct sadb_address)+sockaddr_size)/
2031 			sizeof(uint64_t);
2032 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2033 	addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2034 	addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2035 	addr->sadb_address_reserved = 0;
2036 
2037 	pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2038 			    (struct sockaddr *) (addr + 1),
2039 			    xp->family);
2040 
2041 	/* hard time */
2042 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
2043 						     sizeof(struct sadb_lifetime));
2044 	lifetime->sadb_lifetime_len =
2045 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2046 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2047 	lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2048 	lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2049 	lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2050 	lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2051 	/* soft time */
2052 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
2053 						     sizeof(struct sadb_lifetime));
2054 	lifetime->sadb_lifetime_len =
2055 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2056 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2057 	lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2058 	lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2059 	lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2060 	lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2061 	/* current time */
2062 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
2063 						     sizeof(struct sadb_lifetime));
2064 	lifetime->sadb_lifetime_len =
2065 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2066 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2067 	lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2068 	lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2069 	lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2070 	lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2071 
2072 	pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2073 	pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2074 	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2075 	pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2076 	if (xp->action == XFRM_POLICY_ALLOW) {
2077 		if (xp->xfrm_nr)
2078 			pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2079 		else
2080 			pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2081 	}
2082 	pol->sadb_x_policy_dir = dir+1;
2083 	pol->sadb_x_policy_id = xp->index;
2084 	pol->sadb_x_policy_priority = xp->priority;
2085 
2086 	for (i=0; i<xp->xfrm_nr; i++) {
2087 		struct sadb_x_ipsecrequest *rq;
2088 		struct xfrm_tmpl *t = xp->xfrm_vec + i;
2089 		int req_size;
2090 		int mode;
2091 
2092 		req_size = sizeof(struct sadb_x_ipsecrequest);
2093 		if (t->mode == XFRM_MODE_TUNNEL) {
2094 			socklen = pfkey_sockaddr_len(t->encap_family);
2095 			req_size += socklen * 2;
2096 		} else {
2097 			size -= 2*socklen;
2098 		}
2099 		rq = (void*)skb_put(skb, req_size);
2100 		pol->sadb_x_policy_len += req_size/8;
2101 		memset(rq, 0, sizeof(*rq));
2102 		rq->sadb_x_ipsecrequest_len = req_size;
2103 		rq->sadb_x_ipsecrequest_proto = t->id.proto;
2104 		if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2105 			return -EINVAL;
2106 		rq->sadb_x_ipsecrequest_mode = mode;
2107 		rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2108 		if (t->reqid)
2109 			rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2110 		if (t->optional)
2111 			rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2112 		rq->sadb_x_ipsecrequest_reqid = t->reqid;
2113 
2114 		if (t->mode == XFRM_MODE_TUNNEL) {
2115 			u8 *sa = (void *)(rq + 1);
2116 			pfkey_sockaddr_fill(&t->saddr, 0,
2117 					    (struct sockaddr *)sa,
2118 					    t->encap_family);
2119 			pfkey_sockaddr_fill(&t->id.daddr, 0,
2120 					    (struct sockaddr *) (sa + socklen),
2121 					    t->encap_family);
2122 		}
2123 	}
2124 
2125 	/* security context */
2126 	if ((xfrm_ctx = xp->security)) {
2127 		int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2128 
2129 		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2130 		sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2131 		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2132 		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2133 		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2134 		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2135 		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2136 		       xfrm_ctx->ctx_len);
2137 	}
2138 
2139 	hdr->sadb_msg_len = size / sizeof(uint64_t);
2140 	hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2141 
2142 	return 0;
2143 }
2144 
2145 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2146 {
2147 	struct sk_buff *out_skb;
2148 	struct sadb_msg *out_hdr;
2149 	int err;
2150 
2151 	out_skb = pfkey_xfrm_policy2msg_prep(xp);
2152 	if (IS_ERR(out_skb)) {
2153 		err = PTR_ERR(out_skb);
2154 		goto out;
2155 	}
2156 	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2157 	if (err < 0)
2158 		return err;
2159 
2160 	out_hdr = (struct sadb_msg *) out_skb->data;
2161 	out_hdr->sadb_msg_version = PF_KEY_V2;
2162 
2163 	if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2164 		out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2165 	else
2166 		out_hdr->sadb_msg_type = event2poltype(c->event);
2167 	out_hdr->sadb_msg_errno = 0;
2168 	out_hdr->sadb_msg_seq = c->seq;
2169 	out_hdr->sadb_msg_pid = c->pid;
2170 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2171 out:
2172 	return 0;
2173 
2174 }
2175 
2176 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2177 {
2178 	struct net *net = sock_net(sk);
2179 	int err = 0;
2180 	struct sadb_lifetime *lifetime;
2181 	struct sadb_address *sa;
2182 	struct sadb_x_policy *pol;
2183 	struct xfrm_policy *xp;
2184 	struct km_event c;
2185 	struct sadb_x_sec_ctx *sec_ctx;
2186 
2187 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2188 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2189 	    !ext_hdrs[SADB_X_EXT_POLICY-1])
2190 		return -EINVAL;
2191 
2192 	pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2193 	if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2194 		return -EINVAL;
2195 	if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2196 		return -EINVAL;
2197 
2198 	xp = xfrm_policy_alloc(net, GFP_KERNEL);
2199 	if (xp == NULL)
2200 		return -ENOBUFS;
2201 
2202 	xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2203 		      XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2204 	xp->priority = pol->sadb_x_policy_priority;
2205 
2206 	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2207 	xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2208 	if (!xp->family) {
2209 		err = -EINVAL;
2210 		goto out;
2211 	}
2212 	xp->selector.family = xp->family;
2213 	xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2214 	xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2215 	xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2216 	if (xp->selector.sport)
2217 		xp->selector.sport_mask = htons(0xffff);
2218 
2219 	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2220 	pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2221 	xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2222 
2223 	/* Amusing, we set this twice.  KAME apps appear to set same value
2224 	 * in both addresses.
2225 	 */
2226 	xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2227 
2228 	xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2229 	if (xp->selector.dport)
2230 		xp->selector.dport_mask = htons(0xffff);
2231 
2232 	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2233 	if (sec_ctx != NULL) {
2234 		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2235 
2236 		if (!uctx) {
2237 			err = -ENOBUFS;
2238 			goto out;
2239 		}
2240 
2241 		err = security_xfrm_policy_alloc(&xp->security, uctx);
2242 		kfree(uctx);
2243 
2244 		if (err)
2245 			goto out;
2246 	}
2247 
2248 	xp->lft.soft_byte_limit = XFRM_INF;
2249 	xp->lft.hard_byte_limit = XFRM_INF;
2250 	xp->lft.soft_packet_limit = XFRM_INF;
2251 	xp->lft.hard_packet_limit = XFRM_INF;
2252 	if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2253 		xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2254 		xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2255 		xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2256 		xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2257 	}
2258 	if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2259 		xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2260 		xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2261 		xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2262 		xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2263 	}
2264 	xp->xfrm_nr = 0;
2265 	if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2266 	    (err = parse_ipsecrequests(xp, pol)) < 0)
2267 		goto out;
2268 
2269 	err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2270 				 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2271 
2272 	xfrm_audit_policy_add(xp, err ? 0 : 1,
2273 			      audit_get_loginuid(current),
2274 			      audit_get_sessionid(current), 0);
2275 
2276 	if (err)
2277 		goto out;
2278 
2279 	if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2280 		c.event = XFRM_MSG_UPDPOLICY;
2281 	else
2282 		c.event = XFRM_MSG_NEWPOLICY;
2283 
2284 	c.seq = hdr->sadb_msg_seq;
2285 	c.pid = hdr->sadb_msg_pid;
2286 
2287 	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2288 	xfrm_pol_put(xp);
2289 	return 0;
2290 
2291 out:
2292 	xp->walk.dead = 1;
2293 	xfrm_policy_destroy(xp);
2294 	return err;
2295 }
2296 
2297 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2298 {
2299 	struct net *net = sock_net(sk);
2300 	int err;
2301 	struct sadb_address *sa;
2302 	struct sadb_x_policy *pol;
2303 	struct xfrm_policy *xp;
2304 	struct xfrm_selector sel;
2305 	struct km_event c;
2306 	struct sadb_x_sec_ctx *sec_ctx;
2307 	struct xfrm_sec_ctx *pol_ctx = NULL;
2308 
2309 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2310 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2311 	    !ext_hdrs[SADB_X_EXT_POLICY-1])
2312 		return -EINVAL;
2313 
2314 	pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2315 	if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2316 		return -EINVAL;
2317 
2318 	memset(&sel, 0, sizeof(sel));
2319 
2320 	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2321 	sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2322 	sel.prefixlen_s = sa->sadb_address_prefixlen;
2323 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324 	sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325 	if (sel.sport)
2326 		sel.sport_mask = htons(0xffff);
2327 
2328 	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2329 	pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2330 	sel.prefixlen_d = sa->sadb_address_prefixlen;
2331 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2332 	sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2333 	if (sel.dport)
2334 		sel.dport_mask = htons(0xffff);
2335 
2336 	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2337 	if (sec_ctx != NULL) {
2338 		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2339 
2340 		if (!uctx)
2341 			return -ENOMEM;
2342 
2343 		err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2344 		kfree(uctx);
2345 		if (err)
2346 			return err;
2347 	}
2348 
2349 	xp = xfrm_policy_bysel_ctx(net, XFRM_POLICY_TYPE_MAIN,
2350 				   pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2351 				   1, &err);
2352 	security_xfrm_policy_free(pol_ctx);
2353 	if (xp == NULL)
2354 		return -ENOENT;
2355 
2356 	xfrm_audit_policy_delete(xp, err ? 0 : 1,
2357 				 audit_get_loginuid(current),
2358 				 audit_get_sessionid(current), 0);
2359 
2360 	if (err)
2361 		goto out;
2362 
2363 	c.seq = hdr->sadb_msg_seq;
2364 	c.pid = hdr->sadb_msg_pid;
2365 	c.data.byid = 0;
2366 	c.event = XFRM_MSG_DELPOLICY;
2367 	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2368 
2369 out:
2370 	xfrm_pol_put(xp);
2371 	return err;
2372 }
2373 
2374 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2375 {
2376 	int err;
2377 	struct sk_buff *out_skb;
2378 	struct sadb_msg *out_hdr;
2379 	err = 0;
2380 
2381 	out_skb = pfkey_xfrm_policy2msg_prep(xp);
2382 	if (IS_ERR(out_skb)) {
2383 		err =  PTR_ERR(out_skb);
2384 		goto out;
2385 	}
2386 	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2387 	if (err < 0)
2388 		goto out;
2389 
2390 	out_hdr = (struct sadb_msg *) out_skb->data;
2391 	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2392 	out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2393 	out_hdr->sadb_msg_satype = 0;
2394 	out_hdr->sadb_msg_errno = 0;
2395 	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2396 	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2397 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2398 	err = 0;
2399 
2400 out:
2401 	return err;
2402 }
2403 
2404 #ifdef CONFIG_NET_KEY_MIGRATE
2405 static int pfkey_sockaddr_pair_size(sa_family_t family)
2406 {
2407 	return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2408 }
2409 
2410 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2411 			       xfrm_address_t *saddr, xfrm_address_t *daddr,
2412 			       u16 *family)
2413 {
2414 	int af, socklen;
2415 
2416 	if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2417 		return -EINVAL;
2418 
2419 	af = pfkey_sockaddr_extract(sa, saddr);
2420 	if (!af)
2421 		return -EINVAL;
2422 
2423 	socklen = pfkey_sockaddr_len(af);
2424 	if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2425 				   daddr) != af)
2426 		return -EINVAL;
2427 
2428 	*family = af;
2429 	return 0;
2430 }
2431 
2432 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2433 				    struct xfrm_migrate *m)
2434 {
2435 	int err;
2436 	struct sadb_x_ipsecrequest *rq2;
2437 	int mode;
2438 
2439 	if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2440 	    len < rq1->sadb_x_ipsecrequest_len)
2441 		return -EINVAL;
2442 
2443 	/* old endoints */
2444 	err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2445 				  rq1->sadb_x_ipsecrequest_len,
2446 				  &m->old_saddr, &m->old_daddr,
2447 				  &m->old_family);
2448 	if (err)
2449 		return err;
2450 
2451 	rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2452 	len -= rq1->sadb_x_ipsecrequest_len;
2453 
2454 	if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2455 	    len < rq2->sadb_x_ipsecrequest_len)
2456 		return -EINVAL;
2457 
2458 	/* new endpoints */
2459 	err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2460 				  rq2->sadb_x_ipsecrequest_len,
2461 				  &m->new_saddr, &m->new_daddr,
2462 				  &m->new_family);
2463 	if (err)
2464 		return err;
2465 
2466 	if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2467 	    rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2468 	    rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2469 		return -EINVAL;
2470 
2471 	m->proto = rq1->sadb_x_ipsecrequest_proto;
2472 	if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2473 		return -EINVAL;
2474 	m->mode = mode;
2475 	m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2476 
2477 	return ((int)(rq1->sadb_x_ipsecrequest_len +
2478 		      rq2->sadb_x_ipsecrequest_len));
2479 }
2480 
2481 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2482 			 struct sadb_msg *hdr, void **ext_hdrs)
2483 {
2484 	int i, len, ret, err = -EINVAL;
2485 	u8 dir;
2486 	struct sadb_address *sa;
2487 	struct sadb_x_kmaddress *kma;
2488 	struct sadb_x_policy *pol;
2489 	struct sadb_x_ipsecrequest *rq;
2490 	struct xfrm_selector sel;
2491 	struct xfrm_migrate m[XFRM_MAX_DEPTH];
2492 	struct xfrm_kmaddress k;
2493 
2494 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2495 				     ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2496 	    !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2497 		err = -EINVAL;
2498 		goto out;
2499 	}
2500 
2501 	kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2502 	pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2503 
2504 	if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2505 		err = -EINVAL;
2506 		goto out;
2507 	}
2508 
2509 	if (kma) {
2510 		/* convert sadb_x_kmaddress to xfrm_kmaddress */
2511 		k.reserved = kma->sadb_x_kmaddress_reserved;
2512 		ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2513 					  8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2514 					  &k.local, &k.remote, &k.family);
2515 		if (ret < 0) {
2516 			err = ret;
2517 			goto out;
2518 		}
2519 	}
2520 
2521 	dir = pol->sadb_x_policy_dir - 1;
2522 	memset(&sel, 0, sizeof(sel));
2523 
2524 	/* set source address info of selector */
2525 	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2526 	sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2527 	sel.prefixlen_s = sa->sadb_address_prefixlen;
2528 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2529 	sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2530 	if (sel.sport)
2531 		sel.sport_mask = htons(0xffff);
2532 
2533 	/* set destination address info of selector */
2534 	sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2535 	pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2536 	sel.prefixlen_d = sa->sadb_address_prefixlen;
2537 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2538 	sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2539 	if (sel.dport)
2540 		sel.dport_mask = htons(0xffff);
2541 
2542 	rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2543 
2544 	/* extract ipsecrequests */
2545 	i = 0;
2546 	len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2547 
2548 	while (len > 0 && i < XFRM_MAX_DEPTH) {
2549 		ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2550 		if (ret < 0) {
2551 			err = ret;
2552 			goto out;
2553 		} else {
2554 			rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2555 			len -= ret;
2556 			i++;
2557 		}
2558 	}
2559 
2560 	if (!i || len > 0) {
2561 		err = -EINVAL;
2562 		goto out;
2563 	}
2564 
2565 	return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2566 			    kma ? &k : NULL);
2567 
2568  out:
2569 	return err;
2570 }
2571 #else
2572 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2573 			 struct sadb_msg *hdr, void **ext_hdrs)
2574 {
2575 	return -ENOPROTOOPT;
2576 }
2577 #endif
2578 
2579 
2580 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2581 {
2582 	struct net *net = sock_net(sk);
2583 	unsigned int dir;
2584 	int err = 0, delete;
2585 	struct sadb_x_policy *pol;
2586 	struct xfrm_policy *xp;
2587 	struct km_event c;
2588 
2589 	if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2590 		return -EINVAL;
2591 
2592 	dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2593 	if (dir >= XFRM_POLICY_MAX)
2594 		return -EINVAL;
2595 
2596 	delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2597 	xp = xfrm_policy_byid(net, XFRM_POLICY_TYPE_MAIN, dir,
2598 			      pol->sadb_x_policy_id, delete, &err);
2599 	if (xp == NULL)
2600 		return -ENOENT;
2601 
2602 	if (delete) {
2603 		xfrm_audit_policy_delete(xp, err ? 0 : 1,
2604 				audit_get_loginuid(current),
2605 				audit_get_sessionid(current), 0);
2606 
2607 		if (err)
2608 			goto out;
2609 		c.seq = hdr->sadb_msg_seq;
2610 		c.pid = hdr->sadb_msg_pid;
2611 		c.data.byid = 1;
2612 		c.event = XFRM_MSG_DELPOLICY;
2613 		km_policy_notify(xp, dir, &c);
2614 	} else {
2615 		err = key_pol_get_resp(sk, xp, hdr, dir);
2616 	}
2617 
2618 out:
2619 	xfrm_pol_put(xp);
2620 	return err;
2621 }
2622 
2623 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2624 {
2625 	struct pfkey_sock *pfk = ptr;
2626 	struct sk_buff *out_skb;
2627 	struct sadb_msg *out_hdr;
2628 	int err;
2629 
2630 	if (!pfkey_can_dump(&pfk->sk))
2631 		return -ENOBUFS;
2632 
2633 	out_skb = pfkey_xfrm_policy2msg_prep(xp);
2634 	if (IS_ERR(out_skb))
2635 		return PTR_ERR(out_skb);
2636 
2637 	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2638 	if (err < 0)
2639 		return err;
2640 
2641 	out_hdr = (struct sadb_msg *) out_skb->data;
2642 	out_hdr->sadb_msg_version = pfk->dump.msg_version;
2643 	out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2644 	out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2645 	out_hdr->sadb_msg_errno = 0;
2646 	out_hdr->sadb_msg_seq = count + 1;
2647 	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
2648 
2649 	if (pfk->dump.skb)
2650 		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2651 				&pfk->sk, sock_net(&pfk->sk));
2652 	pfk->dump.skb = out_skb;
2653 
2654 	return 0;
2655 }
2656 
2657 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2658 {
2659 	struct net *net = sock_net(&pfk->sk);
2660 	return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2661 }
2662 
2663 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2664 {
2665 	xfrm_policy_walk_done(&pfk->dump.u.policy);
2666 }
2667 
2668 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2669 {
2670 	struct pfkey_sock *pfk = pfkey_sk(sk);
2671 
2672 	if (pfk->dump.dump != NULL)
2673 		return -EBUSY;
2674 
2675 	pfk->dump.msg_version = hdr->sadb_msg_version;
2676 	pfk->dump.msg_pid = hdr->sadb_msg_pid;
2677 	pfk->dump.dump = pfkey_dump_sp;
2678 	pfk->dump.done = pfkey_dump_sp_done;
2679 	xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2680 
2681 	return pfkey_do_dump(pfk);
2682 }
2683 
2684 static int key_notify_policy_flush(struct km_event *c)
2685 {
2686 	struct sk_buff *skb_out;
2687 	struct sadb_msg *hdr;
2688 
2689 	skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2690 	if (!skb_out)
2691 		return -ENOBUFS;
2692 	hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2693 	hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2694 	hdr->sadb_msg_seq = c->seq;
2695 	hdr->sadb_msg_pid = c->pid;
2696 	hdr->sadb_msg_version = PF_KEY_V2;
2697 	hdr->sadb_msg_errno = (uint8_t) 0;
2698 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2699 	pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2700 	return 0;
2701 
2702 }
2703 
2704 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2705 {
2706 	struct net *net = sock_net(sk);
2707 	struct km_event c;
2708 	struct xfrm_audit audit_info;
2709 	int err;
2710 
2711 	audit_info.loginuid = audit_get_loginuid(current);
2712 	audit_info.sessionid = audit_get_sessionid(current);
2713 	audit_info.secid = 0;
2714 	err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2715 	if (err)
2716 		return err;
2717 	c.data.type = XFRM_POLICY_TYPE_MAIN;
2718 	c.event = XFRM_MSG_FLUSHPOLICY;
2719 	c.pid = hdr->sadb_msg_pid;
2720 	c.seq = hdr->sadb_msg_seq;
2721 	c.net = net;
2722 	km_policy_notify(NULL, 0, &c);
2723 
2724 	return 0;
2725 }
2726 
2727 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2728 			     struct sadb_msg *hdr, void **ext_hdrs);
2729 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2730 	[SADB_RESERVED]		= pfkey_reserved,
2731 	[SADB_GETSPI]		= pfkey_getspi,
2732 	[SADB_UPDATE]		= pfkey_add,
2733 	[SADB_ADD]		= pfkey_add,
2734 	[SADB_DELETE]		= pfkey_delete,
2735 	[SADB_GET]		= pfkey_get,
2736 	[SADB_ACQUIRE]		= pfkey_acquire,
2737 	[SADB_REGISTER]		= pfkey_register,
2738 	[SADB_EXPIRE]		= NULL,
2739 	[SADB_FLUSH]		= pfkey_flush,
2740 	[SADB_DUMP]		= pfkey_dump,
2741 	[SADB_X_PROMISC]	= pfkey_promisc,
2742 	[SADB_X_PCHANGE]	= NULL,
2743 	[SADB_X_SPDUPDATE]	= pfkey_spdadd,
2744 	[SADB_X_SPDADD]		= pfkey_spdadd,
2745 	[SADB_X_SPDDELETE]	= pfkey_spddelete,
2746 	[SADB_X_SPDGET]		= pfkey_spdget,
2747 	[SADB_X_SPDACQUIRE]	= NULL,
2748 	[SADB_X_SPDDUMP]	= pfkey_spddump,
2749 	[SADB_X_SPDFLUSH]	= pfkey_spdflush,
2750 	[SADB_X_SPDSETIDX]	= pfkey_spdadd,
2751 	[SADB_X_SPDDELETE2]	= pfkey_spdget,
2752 	[SADB_X_MIGRATE]	= pfkey_migrate,
2753 };
2754 
2755 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2756 {
2757 	void *ext_hdrs[SADB_EXT_MAX];
2758 	int err;
2759 
2760 	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2761 			BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2762 
2763 	memset(ext_hdrs, 0, sizeof(ext_hdrs));
2764 	err = parse_exthdrs(skb, hdr, ext_hdrs);
2765 	if (!err) {
2766 		err = -EOPNOTSUPP;
2767 		if (pfkey_funcs[hdr->sadb_msg_type])
2768 			err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2769 	}
2770 	return err;
2771 }
2772 
2773 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2774 {
2775 	struct sadb_msg *hdr = NULL;
2776 
2777 	if (skb->len < sizeof(*hdr)) {
2778 		*errp = -EMSGSIZE;
2779 	} else {
2780 		hdr = (struct sadb_msg *) skb->data;
2781 		if (hdr->sadb_msg_version != PF_KEY_V2 ||
2782 		    hdr->sadb_msg_reserved != 0 ||
2783 		    (hdr->sadb_msg_type <= SADB_RESERVED ||
2784 		     hdr->sadb_msg_type > SADB_MAX)) {
2785 			hdr = NULL;
2786 			*errp = -EINVAL;
2787 		} else if (hdr->sadb_msg_len != (skb->len /
2788 						 sizeof(uint64_t)) ||
2789 			   hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2790 						sizeof(uint64_t))) {
2791 			hdr = NULL;
2792 			*errp = -EMSGSIZE;
2793 		} else {
2794 			*errp = 0;
2795 		}
2796 	}
2797 	return hdr;
2798 }
2799 
2800 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2801 {
2802 	unsigned int id = d->desc.sadb_alg_id;
2803 
2804 	if (id >= sizeof(t->aalgos) * 8)
2805 		return 0;
2806 
2807 	return (t->aalgos >> id) & 1;
2808 }
2809 
2810 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2811 {
2812 	unsigned int id = d->desc.sadb_alg_id;
2813 
2814 	if (id >= sizeof(t->ealgos) * 8)
2815 		return 0;
2816 
2817 	return (t->ealgos >> id) & 1;
2818 }
2819 
2820 static int count_ah_combs(struct xfrm_tmpl *t)
2821 {
2822 	int i, sz = 0;
2823 
2824 	for (i = 0; ; i++) {
2825 		struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2826 		if (!aalg)
2827 			break;
2828 		if (aalg_tmpl_set(t, aalg) && aalg->available)
2829 			sz += sizeof(struct sadb_comb);
2830 	}
2831 	return sz + sizeof(struct sadb_prop);
2832 }
2833 
2834 static int count_esp_combs(struct xfrm_tmpl *t)
2835 {
2836 	int i, k, sz = 0;
2837 
2838 	for (i = 0; ; i++) {
2839 		struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2840 		if (!ealg)
2841 			break;
2842 
2843 		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2844 			continue;
2845 
2846 		for (k = 1; ; k++) {
2847 			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2848 			if (!aalg)
2849 				break;
2850 
2851 			if (aalg_tmpl_set(t, aalg) && aalg->available)
2852 				sz += sizeof(struct sadb_comb);
2853 		}
2854 	}
2855 	return sz + sizeof(struct sadb_prop);
2856 }
2857 
2858 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2859 {
2860 	struct sadb_prop *p;
2861 	int i;
2862 
2863 	p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2864 	p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2865 	p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2866 	p->sadb_prop_replay = 32;
2867 	memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2868 
2869 	for (i = 0; ; i++) {
2870 		struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2871 		if (!aalg)
2872 			break;
2873 
2874 		if (aalg_tmpl_set(t, aalg) && aalg->available) {
2875 			struct sadb_comb *c;
2876 			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2877 			memset(c, 0, sizeof(*c));
2878 			p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2879 			c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2880 			c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2881 			c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2882 			c->sadb_comb_hard_addtime = 24*60*60;
2883 			c->sadb_comb_soft_addtime = 20*60*60;
2884 			c->sadb_comb_hard_usetime = 8*60*60;
2885 			c->sadb_comb_soft_usetime = 7*60*60;
2886 		}
2887 	}
2888 }
2889 
2890 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2891 {
2892 	struct sadb_prop *p;
2893 	int i, k;
2894 
2895 	p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2896 	p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2897 	p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2898 	p->sadb_prop_replay = 32;
2899 	memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2900 
2901 	for (i=0; ; i++) {
2902 		struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2903 		if (!ealg)
2904 			break;
2905 
2906 		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2907 			continue;
2908 
2909 		for (k = 1; ; k++) {
2910 			struct sadb_comb *c;
2911 			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2912 			if (!aalg)
2913 				break;
2914 			if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2915 				continue;
2916 			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2917 			memset(c, 0, sizeof(*c));
2918 			p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2919 			c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2920 			c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2921 			c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2922 			c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2923 			c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2924 			c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2925 			c->sadb_comb_hard_addtime = 24*60*60;
2926 			c->sadb_comb_soft_addtime = 20*60*60;
2927 			c->sadb_comb_hard_usetime = 8*60*60;
2928 			c->sadb_comb_soft_usetime = 7*60*60;
2929 		}
2930 	}
2931 }
2932 
2933 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2934 {
2935 	return 0;
2936 }
2937 
2938 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2939 {
2940 	struct sk_buff *out_skb;
2941 	struct sadb_msg *out_hdr;
2942 	int hard;
2943 	int hsc;
2944 
2945 	hard = c->data.hard;
2946 	if (hard)
2947 		hsc = 2;
2948 	else
2949 		hsc = 1;
2950 
2951 	out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2952 	if (IS_ERR(out_skb))
2953 		return PTR_ERR(out_skb);
2954 
2955 	out_hdr = (struct sadb_msg *) out_skb->data;
2956 	out_hdr->sadb_msg_version = PF_KEY_V2;
2957 	out_hdr->sadb_msg_type = SADB_EXPIRE;
2958 	out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2959 	out_hdr->sadb_msg_errno = 0;
2960 	out_hdr->sadb_msg_reserved = 0;
2961 	out_hdr->sadb_msg_seq = 0;
2962 	out_hdr->sadb_msg_pid = 0;
2963 
2964 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
2965 	return 0;
2966 }
2967 
2968 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2969 {
2970 	struct net *net = x ? xs_net(x) : c->net;
2971 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
2972 
2973 	if (atomic_read(&net_pfkey->socks_nr) == 0)
2974 		return 0;
2975 
2976 	switch (c->event) {
2977 	case XFRM_MSG_EXPIRE:
2978 		return key_notify_sa_expire(x, c);
2979 	case XFRM_MSG_DELSA:
2980 	case XFRM_MSG_NEWSA:
2981 	case XFRM_MSG_UPDSA:
2982 		return key_notify_sa(x, c);
2983 	case XFRM_MSG_FLUSHSA:
2984 		return key_notify_sa_flush(c);
2985 	case XFRM_MSG_NEWAE: /* not yet supported */
2986 		break;
2987 	default:
2988 		printk("pfkey: Unknown SA event %d\n", c->event);
2989 		break;
2990 	}
2991 
2992 	return 0;
2993 }
2994 
2995 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2996 {
2997 	if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2998 		return 0;
2999 
3000 	switch (c->event) {
3001 	case XFRM_MSG_POLEXPIRE:
3002 		return key_notify_policy_expire(xp, c);
3003 	case XFRM_MSG_DELPOLICY:
3004 	case XFRM_MSG_NEWPOLICY:
3005 	case XFRM_MSG_UPDPOLICY:
3006 		return key_notify_policy(xp, dir, c);
3007 	case XFRM_MSG_FLUSHPOLICY:
3008 		if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3009 			break;
3010 		return key_notify_policy_flush(c);
3011 	default:
3012 		printk("pfkey: Unknown policy event %d\n", c->event);
3013 		break;
3014 	}
3015 
3016 	return 0;
3017 }
3018 
3019 static u32 get_acqseq(void)
3020 {
3021 	u32 res;
3022 	static u32 acqseq;
3023 	static DEFINE_SPINLOCK(acqseq_lock);
3024 
3025 	spin_lock_bh(&acqseq_lock);
3026 	res = (++acqseq ? : ++acqseq);
3027 	spin_unlock_bh(&acqseq_lock);
3028 	return res;
3029 }
3030 
3031 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3032 {
3033 	struct sk_buff *skb;
3034 	struct sadb_msg *hdr;
3035 	struct sadb_address *addr;
3036 	struct sadb_x_policy *pol;
3037 	int sockaddr_size;
3038 	int size;
3039 	struct sadb_x_sec_ctx *sec_ctx;
3040 	struct xfrm_sec_ctx *xfrm_ctx;
3041 	int ctx_size = 0;
3042 
3043 	sockaddr_size = pfkey_sockaddr_size(x->props.family);
3044 	if (!sockaddr_size)
3045 		return -EINVAL;
3046 
3047 	size = sizeof(struct sadb_msg) +
3048 		(sizeof(struct sadb_address) * 2) +
3049 		(sockaddr_size * 2) +
3050 		sizeof(struct sadb_x_policy);
3051 
3052 	if (x->id.proto == IPPROTO_AH)
3053 		size += count_ah_combs(t);
3054 	else if (x->id.proto == IPPROTO_ESP)
3055 		size += count_esp_combs(t);
3056 
3057 	if ((xfrm_ctx = x->security)) {
3058 		ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3059 		size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3060 	}
3061 
3062 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
3063 	if (skb == NULL)
3064 		return -ENOMEM;
3065 
3066 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3067 	hdr->sadb_msg_version = PF_KEY_V2;
3068 	hdr->sadb_msg_type = SADB_ACQUIRE;
3069 	hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3070 	hdr->sadb_msg_len = size / sizeof(uint64_t);
3071 	hdr->sadb_msg_errno = 0;
3072 	hdr->sadb_msg_reserved = 0;
3073 	hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3074 	hdr->sadb_msg_pid = 0;
3075 
3076 	/* src address */
3077 	addr = (struct sadb_address*) skb_put(skb,
3078 					      sizeof(struct sadb_address)+sockaddr_size);
3079 	addr->sadb_address_len =
3080 		(sizeof(struct sadb_address)+sockaddr_size)/
3081 			sizeof(uint64_t);
3082 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3083 	addr->sadb_address_proto = 0;
3084 	addr->sadb_address_reserved = 0;
3085 	addr->sadb_address_prefixlen =
3086 		pfkey_sockaddr_fill(&x->props.saddr, 0,
3087 				    (struct sockaddr *) (addr + 1),
3088 				    x->props.family);
3089 	if (!addr->sadb_address_prefixlen)
3090 		BUG();
3091 
3092 	/* dst address */
3093 	addr = (struct sadb_address*) skb_put(skb,
3094 					      sizeof(struct sadb_address)+sockaddr_size);
3095 	addr->sadb_address_len =
3096 		(sizeof(struct sadb_address)+sockaddr_size)/
3097 			sizeof(uint64_t);
3098 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3099 	addr->sadb_address_proto = 0;
3100 	addr->sadb_address_reserved = 0;
3101 	addr->sadb_address_prefixlen =
3102 		pfkey_sockaddr_fill(&x->id.daddr, 0,
3103 				    (struct sockaddr *) (addr + 1),
3104 				    x->props.family);
3105 	if (!addr->sadb_address_prefixlen)
3106 		BUG();
3107 
3108 	pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3109 	pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3110 	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3111 	pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3112 	pol->sadb_x_policy_dir = dir+1;
3113 	pol->sadb_x_policy_id = xp->index;
3114 
3115 	/* Set sadb_comb's. */
3116 	if (x->id.proto == IPPROTO_AH)
3117 		dump_ah_combs(skb, t);
3118 	else if (x->id.proto == IPPROTO_ESP)
3119 		dump_esp_combs(skb, t);
3120 
3121 	/* security context */
3122 	if (xfrm_ctx) {
3123 		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3124 				sizeof(struct sadb_x_sec_ctx) + ctx_size);
3125 		sec_ctx->sadb_x_sec_len =
3126 		  (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3127 		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3128 		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3129 		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3130 		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3131 		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3132 		       xfrm_ctx->ctx_len);
3133 	}
3134 
3135 	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3136 }
3137 
3138 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3139 						u8 *data, int len, int *dir)
3140 {
3141 	struct net *net = sock_net(sk);
3142 	struct xfrm_policy *xp;
3143 	struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3144 	struct sadb_x_sec_ctx *sec_ctx;
3145 
3146 	switch (sk->sk_family) {
3147 	case AF_INET:
3148 		if (opt != IP_IPSEC_POLICY) {
3149 			*dir = -EOPNOTSUPP;
3150 			return NULL;
3151 		}
3152 		break;
3153 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3154 	case AF_INET6:
3155 		if (opt != IPV6_IPSEC_POLICY) {
3156 			*dir = -EOPNOTSUPP;
3157 			return NULL;
3158 		}
3159 		break;
3160 #endif
3161 	default:
3162 		*dir = -EINVAL;
3163 		return NULL;
3164 	}
3165 
3166 	*dir = -EINVAL;
3167 
3168 	if (len < sizeof(struct sadb_x_policy) ||
3169 	    pol->sadb_x_policy_len*8 > len ||
3170 	    pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3171 	    (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3172 		return NULL;
3173 
3174 	xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3175 	if (xp == NULL) {
3176 		*dir = -ENOBUFS;
3177 		return NULL;
3178 	}
3179 
3180 	xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3181 		      XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3182 
3183 	xp->lft.soft_byte_limit = XFRM_INF;
3184 	xp->lft.hard_byte_limit = XFRM_INF;
3185 	xp->lft.soft_packet_limit = XFRM_INF;
3186 	xp->lft.hard_packet_limit = XFRM_INF;
3187 	xp->family = sk->sk_family;
3188 
3189 	xp->xfrm_nr = 0;
3190 	if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3191 	    (*dir = parse_ipsecrequests(xp, pol)) < 0)
3192 		goto out;
3193 
3194 	/* security context too */
3195 	if (len >= (pol->sadb_x_policy_len*8 +
3196 	    sizeof(struct sadb_x_sec_ctx))) {
3197 		char *p = (char *)pol;
3198 		struct xfrm_user_sec_ctx *uctx;
3199 
3200 		p += pol->sadb_x_policy_len*8;
3201 		sec_ctx = (struct sadb_x_sec_ctx *)p;
3202 		if (len < pol->sadb_x_policy_len*8 +
3203 		    sec_ctx->sadb_x_sec_len) {
3204 			*dir = -EINVAL;
3205 			goto out;
3206 		}
3207 		if ((*dir = verify_sec_ctx_len(p)))
3208 			goto out;
3209 		uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3210 		*dir = security_xfrm_policy_alloc(&xp->security, uctx);
3211 		kfree(uctx);
3212 
3213 		if (*dir)
3214 			goto out;
3215 	}
3216 
3217 	*dir = pol->sadb_x_policy_dir-1;
3218 	return xp;
3219 
3220 out:
3221 	xp->walk.dead = 1;
3222 	xfrm_policy_destroy(xp);
3223 	return NULL;
3224 }
3225 
3226 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3227 {
3228 	struct sk_buff *skb;
3229 	struct sadb_msg *hdr;
3230 	struct sadb_sa *sa;
3231 	struct sadb_address *addr;
3232 	struct sadb_x_nat_t_port *n_port;
3233 	int sockaddr_size;
3234 	int size;
3235 	__u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3236 	struct xfrm_encap_tmpl *natt = NULL;
3237 
3238 	sockaddr_size = pfkey_sockaddr_size(x->props.family);
3239 	if (!sockaddr_size)
3240 		return -EINVAL;
3241 
3242 	if (!satype)
3243 		return -EINVAL;
3244 
3245 	if (!x->encap)
3246 		return -EINVAL;
3247 
3248 	natt = x->encap;
3249 
3250 	/* Build an SADB_X_NAT_T_NEW_MAPPING message:
3251 	 *
3252 	 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3253 	 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3254 	 */
3255 
3256 	size = sizeof(struct sadb_msg) +
3257 		sizeof(struct sadb_sa) +
3258 		(sizeof(struct sadb_address) * 2) +
3259 		(sockaddr_size * 2) +
3260 		(sizeof(struct sadb_x_nat_t_port) * 2);
3261 
3262 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
3263 	if (skb == NULL)
3264 		return -ENOMEM;
3265 
3266 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3267 	hdr->sadb_msg_version = PF_KEY_V2;
3268 	hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3269 	hdr->sadb_msg_satype = satype;
3270 	hdr->sadb_msg_len = size / sizeof(uint64_t);
3271 	hdr->sadb_msg_errno = 0;
3272 	hdr->sadb_msg_reserved = 0;
3273 	hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3274 	hdr->sadb_msg_pid = 0;
3275 
3276 	/* SA */
3277 	sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3278 	sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3279 	sa->sadb_sa_exttype = SADB_EXT_SA;
3280 	sa->sadb_sa_spi = x->id.spi;
3281 	sa->sadb_sa_replay = 0;
3282 	sa->sadb_sa_state = 0;
3283 	sa->sadb_sa_auth = 0;
3284 	sa->sadb_sa_encrypt = 0;
3285 	sa->sadb_sa_flags = 0;
3286 
3287 	/* ADDRESS_SRC (old addr) */
3288 	addr = (struct sadb_address*)
3289 		skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3290 	addr->sadb_address_len =
3291 		(sizeof(struct sadb_address)+sockaddr_size)/
3292 			sizeof(uint64_t);
3293 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3294 	addr->sadb_address_proto = 0;
3295 	addr->sadb_address_reserved = 0;
3296 	addr->sadb_address_prefixlen =
3297 		pfkey_sockaddr_fill(&x->props.saddr, 0,
3298 				    (struct sockaddr *) (addr + 1),
3299 				    x->props.family);
3300 	if (!addr->sadb_address_prefixlen)
3301 		BUG();
3302 
3303 	/* NAT_T_SPORT (old port) */
3304 	n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3305 	n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3306 	n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3307 	n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3308 	n_port->sadb_x_nat_t_port_reserved = 0;
3309 
3310 	/* ADDRESS_DST (new addr) */
3311 	addr = (struct sadb_address*)
3312 		skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3313 	addr->sadb_address_len =
3314 		(sizeof(struct sadb_address)+sockaddr_size)/
3315 			sizeof(uint64_t);
3316 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3317 	addr->sadb_address_proto = 0;
3318 	addr->sadb_address_reserved = 0;
3319 	addr->sadb_address_prefixlen =
3320 		pfkey_sockaddr_fill(ipaddr, 0,
3321 				    (struct sockaddr *) (addr + 1),
3322 				    x->props.family);
3323 	if (!addr->sadb_address_prefixlen)
3324 		BUG();
3325 
3326 	/* NAT_T_DPORT (new port) */
3327 	n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3328 	n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3329 	n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3330 	n_port->sadb_x_nat_t_port_port = sport;
3331 	n_port->sadb_x_nat_t_port_reserved = 0;
3332 
3333 	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3334 }
3335 
3336 #ifdef CONFIG_NET_KEY_MIGRATE
3337 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3338 			    struct xfrm_selector *sel)
3339 {
3340 	struct sadb_address *addr;
3341 	addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3342 	addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3343 	addr->sadb_address_exttype = type;
3344 	addr->sadb_address_proto = sel->proto;
3345 	addr->sadb_address_reserved = 0;
3346 
3347 	switch (type) {
3348 	case SADB_EXT_ADDRESS_SRC:
3349 		addr->sadb_address_prefixlen = sel->prefixlen_s;
3350 		pfkey_sockaddr_fill(&sel->saddr, 0,
3351 				    (struct sockaddr *)(addr + 1),
3352 				    sel->family);
3353 		break;
3354 	case SADB_EXT_ADDRESS_DST:
3355 		addr->sadb_address_prefixlen = sel->prefixlen_d;
3356 		pfkey_sockaddr_fill(&sel->daddr, 0,
3357 				    (struct sockaddr *)(addr + 1),
3358 				    sel->family);
3359 		break;
3360 	default:
3361 		return -EINVAL;
3362 	}
3363 
3364 	return 0;
3365 }
3366 
3367 
3368 static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k)
3369 {
3370 	struct sadb_x_kmaddress *kma;
3371 	u8 *sa;
3372 	int family = k->family;
3373 	int socklen = pfkey_sockaddr_len(family);
3374 	int size_req;
3375 
3376 	size_req = (sizeof(struct sadb_x_kmaddress) +
3377 		    pfkey_sockaddr_pair_size(family));
3378 
3379 	kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3380 	memset(kma, 0, size_req);
3381 	kma->sadb_x_kmaddress_len = size_req / 8;
3382 	kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3383 	kma->sadb_x_kmaddress_reserved = k->reserved;
3384 
3385 	sa = (u8 *)(kma + 1);
3386 	if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3387 	    !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3388 		return -EINVAL;
3389 
3390 	return 0;
3391 }
3392 
3393 static int set_ipsecrequest(struct sk_buff *skb,
3394 			    uint8_t proto, uint8_t mode, int level,
3395 			    uint32_t reqid, uint8_t family,
3396 			    xfrm_address_t *src, xfrm_address_t *dst)
3397 {
3398 	struct sadb_x_ipsecrequest *rq;
3399 	u8 *sa;
3400 	int socklen = pfkey_sockaddr_len(family);
3401 	int size_req;
3402 
3403 	size_req = sizeof(struct sadb_x_ipsecrequest) +
3404 		   pfkey_sockaddr_pair_size(family);
3405 
3406 	rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3407 	memset(rq, 0, size_req);
3408 	rq->sadb_x_ipsecrequest_len = size_req;
3409 	rq->sadb_x_ipsecrequest_proto = proto;
3410 	rq->sadb_x_ipsecrequest_mode = mode;
3411 	rq->sadb_x_ipsecrequest_level = level;
3412 	rq->sadb_x_ipsecrequest_reqid = reqid;
3413 
3414 	sa = (u8 *) (rq + 1);
3415 	if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3416 	    !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3417 		return -EINVAL;
3418 
3419 	return 0;
3420 }
3421 #endif
3422 
3423 #ifdef CONFIG_NET_KEY_MIGRATE
3424 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3425 			      struct xfrm_migrate *m, int num_bundles,
3426 			      struct xfrm_kmaddress *k)
3427 {
3428 	int i;
3429 	int sasize_sel;
3430 	int size = 0;
3431 	int size_pol = 0;
3432 	struct sk_buff *skb;
3433 	struct sadb_msg *hdr;
3434 	struct sadb_x_policy *pol;
3435 	struct xfrm_migrate *mp;
3436 
3437 	if (type != XFRM_POLICY_TYPE_MAIN)
3438 		return 0;
3439 
3440 	if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3441 		return -EINVAL;
3442 
3443 	if (k != NULL) {
3444 		/* addresses for KM */
3445 		size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3446 				     pfkey_sockaddr_pair_size(k->family));
3447 	}
3448 
3449 	/* selector */
3450 	sasize_sel = pfkey_sockaddr_size(sel->family);
3451 	if (!sasize_sel)
3452 		return -EINVAL;
3453 	size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3454 
3455 	/* policy info */
3456 	size_pol += sizeof(struct sadb_x_policy);
3457 
3458 	/* ipsecrequests */
3459 	for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3460 		/* old locator pair */
3461 		size_pol += sizeof(struct sadb_x_ipsecrequest) +
3462 			    pfkey_sockaddr_pair_size(mp->old_family);
3463 		/* new locator pair */
3464 		size_pol += sizeof(struct sadb_x_ipsecrequest) +
3465 			    pfkey_sockaddr_pair_size(mp->new_family);
3466 	}
3467 
3468 	size += sizeof(struct sadb_msg) + size_pol;
3469 
3470 	/* alloc buffer */
3471 	skb = alloc_skb(size, GFP_ATOMIC);
3472 	if (skb == NULL)
3473 		return -ENOMEM;
3474 
3475 	hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3476 	hdr->sadb_msg_version = PF_KEY_V2;
3477 	hdr->sadb_msg_type = SADB_X_MIGRATE;
3478 	hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3479 	hdr->sadb_msg_len = size / 8;
3480 	hdr->sadb_msg_errno = 0;
3481 	hdr->sadb_msg_reserved = 0;
3482 	hdr->sadb_msg_seq = 0;
3483 	hdr->sadb_msg_pid = 0;
3484 
3485 	/* Addresses to be used by KM for negotiation, if ext is available */
3486 	if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3487 		return -EINVAL;
3488 
3489 	/* selector src */
3490 	set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3491 
3492 	/* selector dst */
3493 	set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3494 
3495 	/* policy information */
3496 	pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3497 	pol->sadb_x_policy_len = size_pol / 8;
3498 	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3499 	pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3500 	pol->sadb_x_policy_dir = dir + 1;
3501 	pol->sadb_x_policy_id = 0;
3502 	pol->sadb_x_policy_priority = 0;
3503 
3504 	for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3505 		/* old ipsecrequest */
3506 		int mode = pfkey_mode_from_xfrm(mp->mode);
3507 		if (mode < 0)
3508 			goto err;
3509 		if (set_ipsecrequest(skb, mp->proto, mode,
3510 				     (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3511 				     mp->reqid, mp->old_family,
3512 				     &mp->old_saddr, &mp->old_daddr) < 0)
3513 			goto err;
3514 
3515 		/* new ipsecrequest */
3516 		if (set_ipsecrequest(skb, mp->proto, mode,
3517 				     (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3518 				     mp->reqid, mp->new_family,
3519 				     &mp->new_saddr, &mp->new_daddr) < 0)
3520 			goto err;
3521 	}
3522 
3523 	/* broadcast migrate message to sockets */
3524 	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3525 
3526 	return 0;
3527 
3528 err:
3529 	kfree_skb(skb);
3530 	return -EINVAL;
3531 }
3532 #else
3533 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3534 			      struct xfrm_migrate *m, int num_bundles,
3535 			      struct xfrm_kmaddress *k)
3536 {
3537 	return -ENOPROTOOPT;
3538 }
3539 #endif
3540 
3541 static int pfkey_sendmsg(struct kiocb *kiocb,
3542 			 struct socket *sock, struct msghdr *msg, size_t len)
3543 {
3544 	struct sock *sk = sock->sk;
3545 	struct sk_buff *skb = NULL;
3546 	struct sadb_msg *hdr = NULL;
3547 	int err;
3548 
3549 	err = -EOPNOTSUPP;
3550 	if (msg->msg_flags & MSG_OOB)
3551 		goto out;
3552 
3553 	err = -EMSGSIZE;
3554 	if ((unsigned)len > sk->sk_sndbuf - 32)
3555 		goto out;
3556 
3557 	err = -ENOBUFS;
3558 	skb = alloc_skb(len, GFP_KERNEL);
3559 	if (skb == NULL)
3560 		goto out;
3561 
3562 	err = -EFAULT;
3563 	if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3564 		goto out;
3565 
3566 	hdr = pfkey_get_base_msg(skb, &err);
3567 	if (!hdr)
3568 		goto out;
3569 
3570 	mutex_lock(&xfrm_cfg_mutex);
3571 	err = pfkey_process(sk, skb, hdr);
3572 	mutex_unlock(&xfrm_cfg_mutex);
3573 
3574 out:
3575 	if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3576 		err = 0;
3577 	kfree_skb(skb);
3578 
3579 	return err ? : len;
3580 }
3581 
3582 static int pfkey_recvmsg(struct kiocb *kiocb,
3583 			 struct socket *sock, struct msghdr *msg, size_t len,
3584 			 int flags)
3585 {
3586 	struct sock *sk = sock->sk;
3587 	struct pfkey_sock *pfk = pfkey_sk(sk);
3588 	struct sk_buff *skb;
3589 	int copied, err;
3590 
3591 	err = -EINVAL;
3592 	if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3593 		goto out;
3594 
3595 	msg->msg_namelen = 0;
3596 	skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3597 	if (skb == NULL)
3598 		goto out;
3599 
3600 	copied = skb->len;
3601 	if (copied > len) {
3602 		msg->msg_flags |= MSG_TRUNC;
3603 		copied = len;
3604 	}
3605 
3606 	skb_reset_transport_header(skb);
3607 	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3608 	if (err)
3609 		goto out_free;
3610 
3611 	sock_recv_ts_and_drops(msg, sk, skb);
3612 
3613 	err = (flags & MSG_TRUNC) ? skb->len : copied;
3614 
3615 	if (pfk->dump.dump != NULL &&
3616 	    3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3617 		pfkey_do_dump(pfk);
3618 
3619 out_free:
3620 	skb_free_datagram(sk, skb);
3621 out:
3622 	return err;
3623 }
3624 
3625 static const struct proto_ops pfkey_ops = {
3626 	.family		=	PF_KEY,
3627 	.owner		=	THIS_MODULE,
3628 	/* Operations that make no sense on pfkey sockets. */
3629 	.bind		=	sock_no_bind,
3630 	.connect	=	sock_no_connect,
3631 	.socketpair	=	sock_no_socketpair,
3632 	.accept		=	sock_no_accept,
3633 	.getname	=	sock_no_getname,
3634 	.ioctl		=	sock_no_ioctl,
3635 	.listen		=	sock_no_listen,
3636 	.shutdown	=	sock_no_shutdown,
3637 	.setsockopt	=	sock_no_setsockopt,
3638 	.getsockopt	=	sock_no_getsockopt,
3639 	.mmap		=	sock_no_mmap,
3640 	.sendpage	=	sock_no_sendpage,
3641 
3642 	/* Now the operations that really occur. */
3643 	.release	=	pfkey_release,
3644 	.poll		=	datagram_poll,
3645 	.sendmsg	=	pfkey_sendmsg,
3646 	.recvmsg	=	pfkey_recvmsg,
3647 };
3648 
3649 static const struct net_proto_family pfkey_family_ops = {
3650 	.family	=	PF_KEY,
3651 	.create	=	pfkey_create,
3652 	.owner	=	THIS_MODULE,
3653 };
3654 
3655 #ifdef CONFIG_PROC_FS
3656 static int pfkey_seq_show(struct seq_file *f, void *v)
3657 {
3658 	struct sock *s;
3659 
3660 	s = (struct sock *)v;
3661 	if (v == SEQ_START_TOKEN)
3662 		seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3663 	else
3664 		seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
3665 			       s,
3666 			       atomic_read(&s->sk_refcnt),
3667 			       sk_rmem_alloc_get(s),
3668 			       sk_wmem_alloc_get(s),
3669 			       sock_i_uid(s),
3670 			       sock_i_ino(s)
3671 			       );
3672 	return 0;
3673 }
3674 
3675 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3676 {
3677 	struct net *net = seq_file_net(f);
3678 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3679 	struct sock *s;
3680 	struct hlist_node *node;
3681 	loff_t pos = *ppos;
3682 
3683 	read_lock(&pfkey_table_lock);
3684 	if (pos == 0)
3685 		return SEQ_START_TOKEN;
3686 
3687 	sk_for_each(s, node, &net_pfkey->table)
3688 		if (pos-- == 1)
3689 			return s;
3690 
3691 	return NULL;
3692 }
3693 
3694 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3695 {
3696 	struct net *net = seq_file_net(f);
3697 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3698 
3699 	++*ppos;
3700 	return (v == SEQ_START_TOKEN) ?
3701 		sk_head(&net_pfkey->table) :
3702 			sk_next((struct sock *)v);
3703 }
3704 
3705 static void pfkey_seq_stop(struct seq_file *f, void *v)
3706 {
3707 	read_unlock(&pfkey_table_lock);
3708 }
3709 
3710 static const struct seq_operations pfkey_seq_ops = {
3711 	.start	= pfkey_seq_start,
3712 	.next	= pfkey_seq_next,
3713 	.stop	= pfkey_seq_stop,
3714 	.show	= pfkey_seq_show,
3715 };
3716 
3717 static int pfkey_seq_open(struct inode *inode, struct file *file)
3718 {
3719 	return seq_open_net(inode, file, &pfkey_seq_ops,
3720 			    sizeof(struct seq_net_private));
3721 }
3722 
3723 static const struct file_operations pfkey_proc_ops = {
3724 	.open	 = pfkey_seq_open,
3725 	.read	 = seq_read,
3726 	.llseek	 = seq_lseek,
3727 	.release = seq_release_net,
3728 };
3729 
3730 static int __net_init pfkey_init_proc(struct net *net)
3731 {
3732 	struct proc_dir_entry *e;
3733 
3734 	e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3735 	if (e == NULL)
3736 		return -ENOMEM;
3737 
3738 	return 0;
3739 }
3740 
3741 static void pfkey_exit_proc(struct net *net)
3742 {
3743 	proc_net_remove(net, "pfkey");
3744 }
3745 #else
3746 static int __net_init pfkey_init_proc(struct net *net)
3747 {
3748 	return 0;
3749 }
3750 
3751 static void pfkey_exit_proc(struct net *net)
3752 {
3753 }
3754 #endif
3755 
3756 static struct xfrm_mgr pfkeyv2_mgr =
3757 {
3758 	.id		= "pfkeyv2",
3759 	.notify		= pfkey_send_notify,
3760 	.acquire	= pfkey_send_acquire,
3761 	.compile_policy	= pfkey_compile_policy,
3762 	.new_mapping	= pfkey_send_new_mapping,
3763 	.notify_policy	= pfkey_send_policy_notify,
3764 	.migrate	= pfkey_send_migrate,
3765 };
3766 
3767 static int __net_init pfkey_net_init(struct net *net)
3768 {
3769 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3770 	int rv;
3771 
3772 	INIT_HLIST_HEAD(&net_pfkey->table);
3773 	atomic_set(&net_pfkey->socks_nr, 0);
3774 
3775 	rv = pfkey_init_proc(net);
3776 
3777 	return rv;
3778 }
3779 
3780 static void __net_exit pfkey_net_exit(struct net *net)
3781 {
3782 	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3783 
3784 	pfkey_exit_proc(net);
3785 	BUG_ON(!hlist_empty(&net_pfkey->table));
3786 }
3787 
3788 static struct pernet_operations pfkey_net_ops = {
3789 	.init = pfkey_net_init,
3790 	.exit = pfkey_net_exit,
3791 	.id   = &pfkey_net_id,
3792 	.size = sizeof(struct netns_pfkey),
3793 };
3794 
3795 static void __exit ipsec_pfkey_exit(void)
3796 {
3797 	unregister_pernet_subsys(&pfkey_net_ops);
3798 	xfrm_unregister_km(&pfkeyv2_mgr);
3799 	sock_unregister(PF_KEY);
3800 	proto_unregister(&key_proto);
3801 }
3802 
3803 static int __init ipsec_pfkey_init(void)
3804 {
3805 	int err = proto_register(&key_proto, 0);
3806 
3807 	if (err != 0)
3808 		goto out;
3809 
3810 	err = sock_register(&pfkey_family_ops);
3811 	if (err != 0)
3812 		goto out_unregister_key_proto;
3813 	err = xfrm_register_km(&pfkeyv2_mgr);
3814 	if (err != 0)
3815 		goto out_sock_unregister;
3816 	err = register_pernet_subsys(&pfkey_net_ops);
3817 	if (err != 0)
3818 		goto out_xfrm_unregister_km;
3819 out:
3820 	return err;
3821 out_xfrm_unregister_km:
3822 	xfrm_unregister_km(&pfkeyv2_mgr);
3823 out_sock_unregister:
3824 	sock_unregister(PF_KEY);
3825 out_unregister_key_proto:
3826 	proto_unregister(&key_proto);
3827 	goto out;
3828 }
3829 
3830 module_init(ipsec_pfkey_init);
3831 module_exit(ipsec_pfkey_exit);
3832 MODULE_LICENSE("GPL");
3833 MODULE_ALIAS_NETPROTO(PF_KEY);
3834