xref: /openbmc/linux/net/key/af_key.c (revision 643d1f7f)
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/xfrm.h>
31 
32 #include <net/sock.h>
33 
34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
36 
37 
38 /* List of all pfkey sockets. */
39 static HLIST_HEAD(pfkey_table);
40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41 static DEFINE_RWLOCK(pfkey_table_lock);
42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43 
44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
45 
46 struct pfkey_sock {
47 	/* struct sock must be the first member of struct pfkey_sock */
48 	struct sock	sk;
49 	int		registered;
50 	int		promisc;
51 };
52 
53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54 {
55 	return (struct pfkey_sock *)sk;
56 }
57 
58 static void pfkey_sock_destruct(struct sock *sk)
59 {
60 	skb_queue_purge(&sk->sk_receive_queue);
61 
62 	if (!sock_flag(sk, SOCK_DEAD)) {
63 		printk("Attempt to release alive pfkey socket: %p\n", sk);
64 		return;
65 	}
66 
67 	BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68 	BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69 
70 	atomic_dec(&pfkey_socks_nr);
71 }
72 
73 static void pfkey_table_grab(void)
74 {
75 	write_lock_bh(&pfkey_table_lock);
76 
77 	if (atomic_read(&pfkey_table_users)) {
78 		DECLARE_WAITQUEUE(wait, current);
79 
80 		add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81 		for(;;) {
82 			set_current_state(TASK_UNINTERRUPTIBLE);
83 			if (atomic_read(&pfkey_table_users) == 0)
84 				break;
85 			write_unlock_bh(&pfkey_table_lock);
86 			schedule();
87 			write_lock_bh(&pfkey_table_lock);
88 		}
89 
90 		__set_current_state(TASK_RUNNING);
91 		remove_wait_queue(&pfkey_table_wait, &wait);
92 	}
93 }
94 
95 static __inline__ void pfkey_table_ungrab(void)
96 {
97 	write_unlock_bh(&pfkey_table_lock);
98 	wake_up(&pfkey_table_wait);
99 }
100 
101 static __inline__ void pfkey_lock_table(void)
102 {
103 	/* read_lock() synchronizes us to pfkey_table_grab */
104 
105 	read_lock(&pfkey_table_lock);
106 	atomic_inc(&pfkey_table_users);
107 	read_unlock(&pfkey_table_lock);
108 }
109 
110 static __inline__ void pfkey_unlock_table(void)
111 {
112 	if (atomic_dec_and_test(&pfkey_table_users))
113 		wake_up(&pfkey_table_wait);
114 }
115 
116 
117 static const struct proto_ops pfkey_ops;
118 
119 static void pfkey_insert(struct sock *sk)
120 {
121 	pfkey_table_grab();
122 	sk_add_node(sk, &pfkey_table);
123 	pfkey_table_ungrab();
124 }
125 
126 static void pfkey_remove(struct sock *sk)
127 {
128 	pfkey_table_grab();
129 	sk_del_node_init(sk);
130 	pfkey_table_ungrab();
131 }
132 
133 static struct proto key_proto = {
134 	.name	  = "KEY",
135 	.owner	  = THIS_MODULE,
136 	.obj_size = sizeof(struct pfkey_sock),
137 };
138 
139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
140 {
141 	struct sock *sk;
142 	int err;
143 
144 	if (net != &init_net)
145 		return -EAFNOSUPPORT;
146 
147 	if (!capable(CAP_NET_ADMIN))
148 		return -EPERM;
149 	if (sock->type != SOCK_RAW)
150 		return -ESOCKTNOSUPPORT;
151 	if (protocol != PF_KEY_V2)
152 		return -EPROTONOSUPPORT;
153 
154 	err = -ENOMEM;
155 	sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
156 	if (sk == NULL)
157 		goto out;
158 
159 	sock->ops = &pfkey_ops;
160 	sock_init_data(sock, sk);
161 
162 	sk->sk_family = PF_KEY;
163 	sk->sk_destruct = pfkey_sock_destruct;
164 
165 	atomic_inc(&pfkey_socks_nr);
166 
167 	pfkey_insert(sk);
168 
169 	return 0;
170 out:
171 	return err;
172 }
173 
174 static int pfkey_release(struct socket *sock)
175 {
176 	struct sock *sk = sock->sk;
177 
178 	if (!sk)
179 		return 0;
180 
181 	pfkey_remove(sk);
182 
183 	sock_orphan(sk);
184 	sock->sk = NULL;
185 	skb_queue_purge(&sk->sk_write_queue);
186 	sock_put(sk);
187 
188 	return 0;
189 }
190 
191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
192 			       gfp_t allocation, struct sock *sk)
193 {
194 	int err = -ENOBUFS;
195 
196 	sock_hold(sk);
197 	if (*skb2 == NULL) {
198 		if (atomic_read(&skb->users) != 1) {
199 			*skb2 = skb_clone(skb, allocation);
200 		} else {
201 			*skb2 = skb;
202 			atomic_inc(&skb->users);
203 		}
204 	}
205 	if (*skb2 != NULL) {
206 		if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
207 			skb_orphan(*skb2);
208 			skb_set_owner_r(*skb2, sk);
209 			skb_queue_tail(&sk->sk_receive_queue, *skb2);
210 			sk->sk_data_ready(sk, (*skb2)->len);
211 			*skb2 = NULL;
212 			err = 0;
213 		}
214 	}
215 	sock_put(sk);
216 	return err;
217 }
218 
219 /* Send SKB to all pfkey sockets matching selected criteria.  */
220 #define BROADCAST_ALL		0
221 #define BROADCAST_ONE		1
222 #define BROADCAST_REGISTERED	2
223 #define BROADCAST_PROMISC_ONLY	4
224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
225 			   int broadcast_flags, struct sock *one_sk)
226 {
227 	struct sock *sk;
228 	struct hlist_node *node;
229 	struct sk_buff *skb2 = NULL;
230 	int err = -ESRCH;
231 
232 	/* XXX Do we need something like netlink_overrun?  I think
233 	 * XXX PF_KEY socket apps will not mind current behavior.
234 	 */
235 	if (!skb)
236 		return -ENOMEM;
237 
238 	pfkey_lock_table();
239 	sk_for_each(sk, node, &pfkey_table) {
240 		struct pfkey_sock *pfk = pfkey_sk(sk);
241 		int err2;
242 
243 		/* Yes, it means that if you are meant to receive this
244 		 * pfkey message you receive it twice as promiscuous
245 		 * socket.
246 		 */
247 		if (pfk->promisc)
248 			pfkey_broadcast_one(skb, &skb2, allocation, sk);
249 
250 		/* the exact target will be processed later */
251 		if (sk == one_sk)
252 			continue;
253 		if (broadcast_flags != BROADCAST_ALL) {
254 			if (broadcast_flags & BROADCAST_PROMISC_ONLY)
255 				continue;
256 			if ((broadcast_flags & BROADCAST_REGISTERED) &&
257 			    !pfk->registered)
258 				continue;
259 			if (broadcast_flags & BROADCAST_ONE)
260 				continue;
261 		}
262 
263 		err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
264 
265 		/* Error is cleare after succecful sending to at least one
266 		 * registered KM */
267 		if ((broadcast_flags & BROADCAST_REGISTERED) && err)
268 			err = err2;
269 	}
270 	pfkey_unlock_table();
271 
272 	if (one_sk != NULL)
273 		err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
274 
275 	if (skb2)
276 		kfree_skb(skb2);
277 	kfree_skb(skb);
278 	return err;
279 }
280 
281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
282 {
283 	*new = *orig;
284 }
285 
286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
287 {
288 	struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
289 	struct sadb_msg *hdr;
290 
291 	if (!skb)
292 		return -ENOBUFS;
293 
294 	/* Woe be to the platform trying to support PFKEY yet
295 	 * having normal errnos outside the 1-255 range, inclusive.
296 	 */
297 	err = -err;
298 	if (err == ERESTARTSYS ||
299 	    err == ERESTARTNOHAND ||
300 	    err == ERESTARTNOINTR)
301 		err = EINTR;
302 	if (err >= 512)
303 		err = EINVAL;
304 	BUG_ON(err <= 0 || err >= 256);
305 
306 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
307 	pfkey_hdr_dup(hdr, orig);
308 	hdr->sadb_msg_errno = (uint8_t) err;
309 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
310 			     sizeof(uint64_t));
311 
312 	pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
313 
314 	return 0;
315 }
316 
317 static u8 sadb_ext_min_len[] = {
318 	[SADB_EXT_RESERVED]		= (u8) 0,
319 	[SADB_EXT_SA]			= (u8) sizeof(struct sadb_sa),
320 	[SADB_EXT_LIFETIME_CURRENT]	= (u8) sizeof(struct sadb_lifetime),
321 	[SADB_EXT_LIFETIME_HARD]	= (u8) sizeof(struct sadb_lifetime),
322 	[SADB_EXT_LIFETIME_SOFT]	= (u8) sizeof(struct sadb_lifetime),
323 	[SADB_EXT_ADDRESS_SRC]		= (u8) sizeof(struct sadb_address),
324 	[SADB_EXT_ADDRESS_DST]		= (u8) sizeof(struct sadb_address),
325 	[SADB_EXT_ADDRESS_PROXY]	= (u8) sizeof(struct sadb_address),
326 	[SADB_EXT_KEY_AUTH]		= (u8) sizeof(struct sadb_key),
327 	[SADB_EXT_KEY_ENCRYPT]		= (u8) sizeof(struct sadb_key),
328 	[SADB_EXT_IDENTITY_SRC]		= (u8) sizeof(struct sadb_ident),
329 	[SADB_EXT_IDENTITY_DST]		= (u8) sizeof(struct sadb_ident),
330 	[SADB_EXT_SENSITIVITY]		= (u8) sizeof(struct sadb_sens),
331 	[SADB_EXT_PROPOSAL]		= (u8) sizeof(struct sadb_prop),
332 	[SADB_EXT_SUPPORTED_AUTH]	= (u8) sizeof(struct sadb_supported),
333 	[SADB_EXT_SUPPORTED_ENCRYPT]	= (u8) sizeof(struct sadb_supported),
334 	[SADB_EXT_SPIRANGE]		= (u8) sizeof(struct sadb_spirange),
335 	[SADB_X_EXT_KMPRIVATE]		= (u8) sizeof(struct sadb_x_kmprivate),
336 	[SADB_X_EXT_POLICY]		= (u8) sizeof(struct sadb_x_policy),
337 	[SADB_X_EXT_SA2]		= (u8) sizeof(struct sadb_x_sa2),
338 	[SADB_X_EXT_NAT_T_TYPE]		= (u8) sizeof(struct sadb_x_nat_t_type),
339 	[SADB_X_EXT_NAT_T_SPORT]	= (u8) sizeof(struct sadb_x_nat_t_port),
340 	[SADB_X_EXT_NAT_T_DPORT]	= (u8) sizeof(struct sadb_x_nat_t_port),
341 	[SADB_X_EXT_NAT_T_OA]		= (u8) sizeof(struct sadb_address),
342 	[SADB_X_EXT_SEC_CTX]		= (u8) sizeof(struct sadb_x_sec_ctx),
343 };
344 
345 /* Verify sadb_address_{len,prefixlen} against sa_family.  */
346 static int verify_address_len(void *p)
347 {
348 	struct sadb_address *sp = p;
349 	struct sockaddr *addr = (struct sockaddr *)(sp + 1);
350 	struct sockaddr_in *sin;
351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
352 	struct sockaddr_in6 *sin6;
353 #endif
354 	int len;
355 
356 	switch (addr->sa_family) {
357 	case AF_INET:
358 		len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
359 		if (sp->sadb_address_len != len ||
360 		    sp->sadb_address_prefixlen > 32)
361 			return -EINVAL;
362 		break;
363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
364 	case AF_INET6:
365 		len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
366 		if (sp->sadb_address_len != len ||
367 		    sp->sadb_address_prefixlen > 128)
368 			return -EINVAL;
369 		break;
370 #endif
371 	default:
372 		/* It is user using kernel to keep track of security
373 		 * associations for another protocol, such as
374 		 * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
375 		 * lengths.
376 		 *
377 		 * XXX Actually, association/policy database is not yet
378 		 * XXX able to cope with arbitrary sockaddr families.
379 		 * XXX When it can, remove this -EINVAL.  -DaveM
380 		 */
381 		return -EINVAL;
382 		break;
383 	}
384 
385 	return 0;
386 }
387 
388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
389 {
390 	return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
391 			    sec_ctx->sadb_x_ctx_len,
392 			    sizeof(uint64_t));
393 }
394 
395 static inline int verify_sec_ctx_len(void *p)
396 {
397 	struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
398 	int len = sec_ctx->sadb_x_ctx_len;
399 
400 	if (len > PAGE_SIZE)
401 		return -EINVAL;
402 
403 	len = pfkey_sec_ctx_len(sec_ctx);
404 
405 	if (sec_ctx->sadb_x_sec_len != len)
406 		return -EINVAL;
407 
408 	return 0;
409 }
410 
411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
412 {
413 	struct xfrm_user_sec_ctx *uctx = NULL;
414 	int ctx_size = sec_ctx->sadb_x_ctx_len;
415 
416 	uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
417 
418 	if (!uctx)
419 		return NULL;
420 
421 	uctx->len = pfkey_sec_ctx_len(sec_ctx);
422 	uctx->exttype = sec_ctx->sadb_x_sec_exttype;
423 	uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
424 	uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
425 	uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
426 	memcpy(uctx + 1, sec_ctx + 1,
427 	       uctx->ctx_len);
428 
429 	return uctx;
430 }
431 
432 static int present_and_same_family(struct sadb_address *src,
433 				   struct sadb_address *dst)
434 {
435 	struct sockaddr *s_addr, *d_addr;
436 
437 	if (!src || !dst)
438 		return 0;
439 
440 	s_addr = (struct sockaddr *)(src + 1);
441 	d_addr = (struct sockaddr *)(dst + 1);
442 	if (s_addr->sa_family != d_addr->sa_family)
443 		return 0;
444 	if (s_addr->sa_family != AF_INET
445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
446 	    && s_addr->sa_family != AF_INET6
447 #endif
448 		)
449 		return 0;
450 
451 	return 1;
452 }
453 
454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
455 {
456 	char *p = (char *) hdr;
457 	int len = skb->len;
458 
459 	len -= sizeof(*hdr);
460 	p += sizeof(*hdr);
461 	while (len > 0) {
462 		struct sadb_ext *ehdr = (struct sadb_ext *) p;
463 		uint16_t ext_type;
464 		int ext_len;
465 
466 		ext_len  = ehdr->sadb_ext_len;
467 		ext_len *= sizeof(uint64_t);
468 		ext_type = ehdr->sadb_ext_type;
469 		if (ext_len < sizeof(uint64_t) ||
470 		    ext_len > len ||
471 		    ext_type == SADB_EXT_RESERVED)
472 			return -EINVAL;
473 
474 		if (ext_type <= SADB_EXT_MAX) {
475 			int min = (int) sadb_ext_min_len[ext_type];
476 			if (ext_len < min)
477 				return -EINVAL;
478 			if (ext_hdrs[ext_type-1] != NULL)
479 				return -EINVAL;
480 			if (ext_type == SADB_EXT_ADDRESS_SRC ||
481 			    ext_type == SADB_EXT_ADDRESS_DST ||
482 			    ext_type == SADB_EXT_ADDRESS_PROXY ||
483 			    ext_type == SADB_X_EXT_NAT_T_OA) {
484 				if (verify_address_len(p))
485 					return -EINVAL;
486 			}
487 			if (ext_type == SADB_X_EXT_SEC_CTX) {
488 				if (verify_sec_ctx_len(p))
489 					return -EINVAL;
490 			}
491 			ext_hdrs[ext_type-1] = p;
492 		}
493 		p   += ext_len;
494 		len -= ext_len;
495 	}
496 
497 	return 0;
498 }
499 
500 static uint16_t
501 pfkey_satype2proto(uint8_t satype)
502 {
503 	switch (satype) {
504 	case SADB_SATYPE_UNSPEC:
505 		return IPSEC_PROTO_ANY;
506 	case SADB_SATYPE_AH:
507 		return IPPROTO_AH;
508 	case SADB_SATYPE_ESP:
509 		return IPPROTO_ESP;
510 	case SADB_X_SATYPE_IPCOMP:
511 		return IPPROTO_COMP;
512 		break;
513 	default:
514 		return 0;
515 	}
516 	/* NOTREACHED */
517 }
518 
519 static uint8_t
520 pfkey_proto2satype(uint16_t proto)
521 {
522 	switch (proto) {
523 	case IPPROTO_AH:
524 		return SADB_SATYPE_AH;
525 	case IPPROTO_ESP:
526 		return SADB_SATYPE_ESP;
527 	case IPPROTO_COMP:
528 		return SADB_X_SATYPE_IPCOMP;
529 		break;
530 	default:
531 		return 0;
532 	}
533 	/* NOTREACHED */
534 }
535 
536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
537  * say specifically 'just raw sockets' as we encode them as 255.
538  */
539 
540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
541 {
542 	return (proto == IPSEC_PROTO_ANY ? 0 : proto);
543 }
544 
545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
546 {
547 	return (proto ? proto : IPSEC_PROTO_ANY);
548 }
549 
550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
551 				     xfrm_address_t *xaddr)
552 {
553 	switch (((struct sockaddr*)(addr + 1))->sa_family) {
554 	case AF_INET:
555 		xaddr->a4 =
556 			((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
557 		return AF_INET;
558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
559 	case AF_INET6:
560 		memcpy(xaddr->a6,
561 		       &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
562 		       sizeof(struct in6_addr));
563 		return AF_INET6;
564 #endif
565 	default:
566 		return 0;
567 	}
568 	/* NOTREACHED */
569 }
570 
571 static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
572 {
573 	struct sadb_sa *sa;
574 	struct sadb_address *addr;
575 	uint16_t proto;
576 	unsigned short family;
577 	xfrm_address_t *xaddr;
578 
579 	sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
580 	if (sa == NULL)
581 		return NULL;
582 
583 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
584 	if (proto == 0)
585 		return NULL;
586 
587 	/* sadb_address_len should be checked by caller */
588 	addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
589 	if (addr == NULL)
590 		return NULL;
591 
592 	family = ((struct sockaddr *)(addr + 1))->sa_family;
593 	switch (family) {
594 	case AF_INET:
595 		xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
596 		break;
597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
598 	case AF_INET6:
599 		xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
600 		break;
601 #endif
602 	default:
603 		xaddr = NULL;
604 	}
605 
606 	if (!xaddr)
607 		return NULL;
608 
609 	return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
610 }
611 
612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
613 static int
614 pfkey_sockaddr_size(sa_family_t family)
615 {
616 	switch (family) {
617 	case AF_INET:
618 		return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
620 	case AF_INET6:
621 		return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
622 #endif
623 	default:
624 		return 0;
625 	}
626 	/* NOTREACHED */
627 }
628 
629 static inline int pfkey_mode_from_xfrm(int mode)
630 {
631 	switch(mode) {
632 	case XFRM_MODE_TRANSPORT:
633 		return IPSEC_MODE_TRANSPORT;
634 	case XFRM_MODE_TUNNEL:
635 		return IPSEC_MODE_TUNNEL;
636 	case XFRM_MODE_BEET:
637 		return IPSEC_MODE_BEET;
638 	default:
639 		return -1;
640 	}
641 }
642 
643 static inline int pfkey_mode_to_xfrm(int mode)
644 {
645 	switch(mode) {
646 	case IPSEC_MODE_ANY:	/*XXX*/
647 	case IPSEC_MODE_TRANSPORT:
648 		return XFRM_MODE_TRANSPORT;
649 	case IPSEC_MODE_TUNNEL:
650 		return XFRM_MODE_TUNNEL;
651 	case IPSEC_MODE_BEET:
652 		return XFRM_MODE_BEET;
653 	default:
654 		return -1;
655 	}
656 }
657 
658 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
659 					      int add_keys, int hsc)
660 {
661 	struct sk_buff *skb;
662 	struct sadb_msg *hdr;
663 	struct sadb_sa *sa;
664 	struct sadb_lifetime *lifetime;
665 	struct sadb_address *addr;
666 	struct sadb_key *key;
667 	struct sadb_x_sa2 *sa2;
668 	struct sockaddr_in *sin;
669 	struct sadb_x_sec_ctx *sec_ctx;
670 	struct xfrm_sec_ctx *xfrm_ctx;
671 	int ctx_size = 0;
672 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
673 	struct sockaddr_in6 *sin6;
674 #endif
675 	int size;
676 	int auth_key_size = 0;
677 	int encrypt_key_size = 0;
678 	int sockaddr_size;
679 	struct xfrm_encap_tmpl *natt = NULL;
680 	int mode;
681 
682 	/* address family check */
683 	sockaddr_size = pfkey_sockaddr_size(x->props.family);
684 	if (!sockaddr_size)
685 		return ERR_PTR(-EINVAL);
686 
687 	/* base, SA, (lifetime (HSC),) address(SD), (address(P),)
688 	   key(AE), (identity(SD),) (sensitivity)> */
689 	size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
690 		sizeof(struct sadb_lifetime) +
691 		((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
692 		((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
693 			sizeof(struct sadb_address)*2 +
694 				sockaddr_size*2 +
695 					sizeof(struct sadb_x_sa2);
696 
697 	if ((xfrm_ctx = x->security)) {
698 		ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
699 		size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
700 	}
701 
702 	/* identity & sensitivity */
703 
704 	if ((x->props.family == AF_INET &&
705 	     x->sel.saddr.a4 != x->props.saddr.a4)
706 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
707 	    || (x->props.family == AF_INET6 &&
708 		memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
709 #endif
710 		)
711 		size += sizeof(struct sadb_address) + sockaddr_size;
712 
713 	if (add_keys) {
714 		if (x->aalg && x->aalg->alg_key_len) {
715 			auth_key_size =
716 				PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
717 			size += sizeof(struct sadb_key) + auth_key_size;
718 		}
719 		if (x->ealg && x->ealg->alg_key_len) {
720 			encrypt_key_size =
721 				PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
722 			size += sizeof(struct sadb_key) + encrypt_key_size;
723 		}
724 	}
725 	if (x->encap)
726 		natt = x->encap;
727 
728 	if (natt && natt->encap_type) {
729 		size += sizeof(struct sadb_x_nat_t_type);
730 		size += sizeof(struct sadb_x_nat_t_port);
731 		size += sizeof(struct sadb_x_nat_t_port);
732 	}
733 
734 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
735 	if (skb == NULL)
736 		return ERR_PTR(-ENOBUFS);
737 
738 	/* call should fill header later */
739 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
740 	memset(hdr, 0, size);	/* XXX do we need this ? */
741 	hdr->sadb_msg_len = size / sizeof(uint64_t);
742 
743 	/* sa */
744 	sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
745 	sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
746 	sa->sadb_sa_exttype = SADB_EXT_SA;
747 	sa->sadb_sa_spi = x->id.spi;
748 	sa->sadb_sa_replay = x->props.replay_window;
749 	switch (x->km.state) {
750 	case XFRM_STATE_VALID:
751 		sa->sadb_sa_state = x->km.dying ?
752 			SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
753 		break;
754 	case XFRM_STATE_ACQ:
755 		sa->sadb_sa_state = SADB_SASTATE_LARVAL;
756 		break;
757 	default:
758 		sa->sadb_sa_state = SADB_SASTATE_DEAD;
759 		break;
760 	}
761 	sa->sadb_sa_auth = 0;
762 	if (x->aalg) {
763 		struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
764 		sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
765 	}
766 	sa->sadb_sa_encrypt = 0;
767 	BUG_ON(x->ealg && x->calg);
768 	if (x->ealg) {
769 		struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
770 		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
771 	}
772 	/* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
773 	if (x->calg) {
774 		struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
775 		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
776 	}
777 
778 	sa->sadb_sa_flags = 0;
779 	if (x->props.flags & XFRM_STATE_NOECN)
780 		sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
781 	if (x->props.flags & XFRM_STATE_DECAP_DSCP)
782 		sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
783 	if (x->props.flags & XFRM_STATE_NOPMTUDISC)
784 		sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
785 
786 	/* hard time */
787 	if (hsc & 2) {
788 		lifetime = (struct sadb_lifetime *)  skb_put(skb,
789 							     sizeof(struct sadb_lifetime));
790 		lifetime->sadb_lifetime_len =
791 			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
792 		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
793 		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
794 		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
795 		lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
796 		lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
797 	}
798 	/* soft time */
799 	if (hsc & 1) {
800 		lifetime = (struct sadb_lifetime *)  skb_put(skb,
801 							     sizeof(struct sadb_lifetime));
802 		lifetime->sadb_lifetime_len =
803 			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
804 		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
805 		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
806 		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
807 		lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
808 		lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
809 	}
810 	/* current time */
811 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
812 						     sizeof(struct sadb_lifetime));
813 	lifetime->sadb_lifetime_len =
814 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
815 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
816 	lifetime->sadb_lifetime_allocations = x->curlft.packets;
817 	lifetime->sadb_lifetime_bytes = x->curlft.bytes;
818 	lifetime->sadb_lifetime_addtime = x->curlft.add_time;
819 	lifetime->sadb_lifetime_usetime = x->curlft.use_time;
820 	/* src address */
821 	addr = (struct sadb_address*) skb_put(skb,
822 					      sizeof(struct sadb_address)+sockaddr_size);
823 	addr->sadb_address_len =
824 		(sizeof(struct sadb_address)+sockaddr_size)/
825 			sizeof(uint64_t);
826 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
827 	/* "if the ports are non-zero, then the sadb_address_proto field,
828 	   normally zero, MUST be filled in with the transport
829 	   protocol's number." - RFC2367 */
830 	addr->sadb_address_proto = 0;
831 	addr->sadb_address_reserved = 0;
832 	if (x->props.family == AF_INET) {
833 		addr->sadb_address_prefixlen = 32;
834 
835 		sin = (struct sockaddr_in *) (addr + 1);
836 		sin->sin_family = AF_INET;
837 		sin->sin_addr.s_addr = x->props.saddr.a4;
838 		sin->sin_port = 0;
839 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
840 	}
841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
842 	else if (x->props.family == AF_INET6) {
843 		addr->sadb_address_prefixlen = 128;
844 
845 		sin6 = (struct sockaddr_in6 *) (addr + 1);
846 		sin6->sin6_family = AF_INET6;
847 		sin6->sin6_port = 0;
848 		sin6->sin6_flowinfo = 0;
849 		memcpy(&sin6->sin6_addr, x->props.saddr.a6,
850 		       sizeof(struct in6_addr));
851 		sin6->sin6_scope_id = 0;
852 	}
853 #endif
854 	else
855 		BUG();
856 
857 	/* dst address */
858 	addr = (struct sadb_address*) skb_put(skb,
859 					      sizeof(struct sadb_address)+sockaddr_size);
860 	addr->sadb_address_len =
861 		(sizeof(struct sadb_address)+sockaddr_size)/
862 			sizeof(uint64_t);
863 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
864 	addr->sadb_address_proto = 0;
865 	addr->sadb_address_prefixlen = 32; /* XXX */
866 	addr->sadb_address_reserved = 0;
867 	if (x->props.family == AF_INET) {
868 		sin = (struct sockaddr_in *) (addr + 1);
869 		sin->sin_family = AF_INET;
870 		sin->sin_addr.s_addr = x->id.daddr.a4;
871 		sin->sin_port = 0;
872 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
873 
874 		if (x->sel.saddr.a4 != x->props.saddr.a4) {
875 			addr = (struct sadb_address*) skb_put(skb,
876 				sizeof(struct sadb_address)+sockaddr_size);
877 			addr->sadb_address_len =
878 				(sizeof(struct sadb_address)+sockaddr_size)/
879 				sizeof(uint64_t);
880 			addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
881 			addr->sadb_address_proto =
882 				pfkey_proto_from_xfrm(x->sel.proto);
883 			addr->sadb_address_prefixlen = x->sel.prefixlen_s;
884 			addr->sadb_address_reserved = 0;
885 
886 			sin = (struct sockaddr_in *) (addr + 1);
887 			sin->sin_family = AF_INET;
888 			sin->sin_addr.s_addr = x->sel.saddr.a4;
889 			sin->sin_port = x->sel.sport;
890 			memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
891 		}
892 	}
893 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
894 	else if (x->props.family == AF_INET6) {
895 		addr->sadb_address_prefixlen = 128;
896 
897 		sin6 = (struct sockaddr_in6 *) (addr + 1);
898 		sin6->sin6_family = AF_INET6;
899 		sin6->sin6_port = 0;
900 		sin6->sin6_flowinfo = 0;
901 		memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
902 		sin6->sin6_scope_id = 0;
903 
904 		if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
905 			    sizeof(struct in6_addr))) {
906 			addr = (struct sadb_address *) skb_put(skb,
907 				sizeof(struct sadb_address)+sockaddr_size);
908 			addr->sadb_address_len =
909 				(sizeof(struct sadb_address)+sockaddr_size)/
910 				sizeof(uint64_t);
911 			addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
912 			addr->sadb_address_proto =
913 				pfkey_proto_from_xfrm(x->sel.proto);
914 			addr->sadb_address_prefixlen = x->sel.prefixlen_s;
915 			addr->sadb_address_reserved = 0;
916 
917 			sin6 = (struct sockaddr_in6 *) (addr + 1);
918 			sin6->sin6_family = AF_INET6;
919 			sin6->sin6_port = x->sel.sport;
920 			sin6->sin6_flowinfo = 0;
921 			memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
922 			       sizeof(struct in6_addr));
923 			sin6->sin6_scope_id = 0;
924 		}
925 	}
926 #endif
927 	else
928 		BUG();
929 
930 	/* auth key */
931 	if (add_keys && auth_key_size) {
932 		key = (struct sadb_key *) skb_put(skb,
933 						  sizeof(struct sadb_key)+auth_key_size);
934 		key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
935 			sizeof(uint64_t);
936 		key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
937 		key->sadb_key_bits = x->aalg->alg_key_len;
938 		key->sadb_key_reserved = 0;
939 		memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
940 	}
941 	/* encrypt key */
942 	if (add_keys && encrypt_key_size) {
943 		key = (struct sadb_key *) skb_put(skb,
944 						  sizeof(struct sadb_key)+encrypt_key_size);
945 		key->sadb_key_len = (sizeof(struct sadb_key) +
946 				     encrypt_key_size) / sizeof(uint64_t);
947 		key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
948 		key->sadb_key_bits = x->ealg->alg_key_len;
949 		key->sadb_key_reserved = 0;
950 		memcpy(key + 1, x->ealg->alg_key,
951 		       (x->ealg->alg_key_len+7)/8);
952 	}
953 
954 	/* sa */
955 	sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
956 	sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
957 	sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
958 	if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
959 		kfree_skb(skb);
960 		return ERR_PTR(-EINVAL);
961 	}
962 	sa2->sadb_x_sa2_mode = mode;
963 	sa2->sadb_x_sa2_reserved1 = 0;
964 	sa2->sadb_x_sa2_reserved2 = 0;
965 	sa2->sadb_x_sa2_sequence = 0;
966 	sa2->sadb_x_sa2_reqid = x->props.reqid;
967 
968 	if (natt && natt->encap_type) {
969 		struct sadb_x_nat_t_type *n_type;
970 		struct sadb_x_nat_t_port *n_port;
971 
972 		/* type */
973 		n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
974 		n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
975 		n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
976 		n_type->sadb_x_nat_t_type_type = natt->encap_type;
977 		n_type->sadb_x_nat_t_type_reserved[0] = 0;
978 		n_type->sadb_x_nat_t_type_reserved[1] = 0;
979 		n_type->sadb_x_nat_t_type_reserved[2] = 0;
980 
981 		/* source port */
982 		n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
983 		n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
984 		n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
985 		n_port->sadb_x_nat_t_port_port = natt->encap_sport;
986 		n_port->sadb_x_nat_t_port_reserved = 0;
987 
988 		/* dest port */
989 		n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
990 		n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
991 		n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
992 		n_port->sadb_x_nat_t_port_port = natt->encap_dport;
993 		n_port->sadb_x_nat_t_port_reserved = 0;
994 	}
995 
996 	/* security context */
997 	if (xfrm_ctx) {
998 		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
999 				sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000 		sec_ctx->sadb_x_sec_len =
1001 		  (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002 		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003 		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004 		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005 		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006 		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007 		       xfrm_ctx->ctx_len);
1008 	}
1009 
1010 	return skb;
1011 }
1012 
1013 
1014 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1015 {
1016 	struct sk_buff *skb;
1017 
1018 	skb = __pfkey_xfrm_state2msg(x, 1, 3);
1019 
1020 	return skb;
1021 }
1022 
1023 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1024 							  int hsc)
1025 {
1026 	return __pfkey_xfrm_state2msg(x, 0, hsc);
1027 }
1028 
1029 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1030 						void **ext_hdrs)
1031 {
1032 	struct xfrm_state *x;
1033 	struct sadb_lifetime *lifetime;
1034 	struct sadb_sa *sa;
1035 	struct sadb_key *key;
1036 	struct sadb_x_sec_ctx *sec_ctx;
1037 	uint16_t proto;
1038 	int err;
1039 
1040 
1041 	sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1042 	if (!sa ||
1043 	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1044 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1045 		return ERR_PTR(-EINVAL);
1046 	if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1047 	    !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1048 		return ERR_PTR(-EINVAL);
1049 	if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1050 	    !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1051 		return ERR_PTR(-EINVAL);
1052 	if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1053 	    !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1054 		return ERR_PTR(-EINVAL);
1055 
1056 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1057 	if (proto == 0)
1058 		return ERR_PTR(-EINVAL);
1059 
1060 	/* default error is no buffer space */
1061 	err = -ENOBUFS;
1062 
1063 	/* RFC2367:
1064 
1065    Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1066    SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1067    sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1068    Therefore, the sadb_sa_state field of all submitted SAs MUST be
1069    SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1070    not true.
1071 
1072 	   However, KAME setkey always uses SADB_SASTATE_LARVAL.
1073 	   Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1074 	 */
1075 	if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1076 	    (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1077 	     sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1078 	    sa->sadb_sa_encrypt > SADB_EALG_MAX)
1079 		return ERR_PTR(-EINVAL);
1080 	key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1081 	if (key != NULL &&
1082 	    sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1083 	    ((key->sadb_key_bits+7) / 8 == 0 ||
1084 	     (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1085 		return ERR_PTR(-EINVAL);
1086 	key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1087 	if (key != NULL &&
1088 	    sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1089 	    ((key->sadb_key_bits+7) / 8 == 0 ||
1090 	     (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1091 		return ERR_PTR(-EINVAL);
1092 
1093 	x = xfrm_state_alloc();
1094 	if (x == NULL)
1095 		return ERR_PTR(-ENOBUFS);
1096 
1097 	x->id.proto = proto;
1098 	x->id.spi = sa->sadb_sa_spi;
1099 	x->props.replay_window = sa->sadb_sa_replay;
1100 	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1101 		x->props.flags |= XFRM_STATE_NOECN;
1102 	if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1103 		x->props.flags |= XFRM_STATE_DECAP_DSCP;
1104 	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1105 		x->props.flags |= XFRM_STATE_NOPMTUDISC;
1106 
1107 	lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1108 	if (lifetime != NULL) {
1109 		x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1110 		x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1111 		x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1112 		x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1113 	}
1114 	lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1115 	if (lifetime != NULL) {
1116 		x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1117 		x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1118 		x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1119 		x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1120 	}
1121 
1122 	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1123 	if (sec_ctx != NULL) {
1124 		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1125 
1126 		if (!uctx)
1127 			goto out;
1128 
1129 		err = security_xfrm_state_alloc(x, uctx);
1130 		kfree(uctx);
1131 
1132 		if (err)
1133 			goto out;
1134 	}
1135 
1136 	key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1137 	if (sa->sadb_sa_auth) {
1138 		int keysize = 0;
1139 		struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1140 		if (!a) {
1141 			err = -ENOSYS;
1142 			goto out;
1143 		}
1144 		if (key)
1145 			keysize = (key->sadb_key_bits + 7) / 8;
1146 		x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1147 		if (!x->aalg)
1148 			goto out;
1149 		strcpy(x->aalg->alg_name, a->name);
1150 		x->aalg->alg_key_len = 0;
1151 		if (key) {
1152 			x->aalg->alg_key_len = key->sadb_key_bits;
1153 			memcpy(x->aalg->alg_key, key+1, keysize);
1154 		}
1155 		x->props.aalgo = sa->sadb_sa_auth;
1156 		/* x->algo.flags = sa->sadb_sa_flags; */
1157 	}
1158 	if (sa->sadb_sa_encrypt) {
1159 		if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160 			struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161 			if (!a) {
1162 				err = -ENOSYS;
1163 				goto out;
1164 			}
1165 			x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166 			if (!x->calg)
1167 				goto out;
1168 			strcpy(x->calg->alg_name, a->name);
1169 			x->props.calgo = sa->sadb_sa_encrypt;
1170 		} else {
1171 			int keysize = 0;
1172 			struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173 			if (!a) {
1174 				err = -ENOSYS;
1175 				goto out;
1176 			}
1177 			key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178 			if (key)
1179 				keysize = (key->sadb_key_bits + 7) / 8;
1180 			x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181 			if (!x->ealg)
1182 				goto out;
1183 			strcpy(x->ealg->alg_name, a->name);
1184 			x->ealg->alg_key_len = 0;
1185 			if (key) {
1186 				x->ealg->alg_key_len = key->sadb_key_bits;
1187 				memcpy(x->ealg->alg_key, key+1, keysize);
1188 			}
1189 			x->props.ealgo = sa->sadb_sa_encrypt;
1190 		}
1191 	}
1192 	/* x->algo.flags = sa->sadb_sa_flags; */
1193 
1194 	x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1195 						    &x->props.saddr);
1196 	if (!x->props.family) {
1197 		err = -EAFNOSUPPORT;
1198 		goto out;
1199 	}
1200 	pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1201 				  &x->id.daddr);
1202 
1203 	if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204 		struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1205 		int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206 		if (mode < 0) {
1207 			err = -EINVAL;
1208 			goto out;
1209 		}
1210 		x->props.mode = mode;
1211 		x->props.reqid = sa2->sadb_x_sa2_reqid;
1212 	}
1213 
1214 	if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215 		struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216 
1217 		/* Nobody uses this, but we try. */
1218 		x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219 		x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220 	}
1221 
1222 	if (!x->sel.family)
1223 		x->sel.family = x->props.family;
1224 
1225 	if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226 		struct sadb_x_nat_t_type* n_type;
1227 		struct xfrm_encap_tmpl *natt;
1228 
1229 		x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230 		if (!x->encap)
1231 			goto out;
1232 
1233 		natt = x->encap;
1234 		n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235 		natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236 
1237 		if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238 			struct sadb_x_nat_t_port* n_port =
1239 				ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240 			natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241 		}
1242 		if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243 			struct sadb_x_nat_t_port* n_port =
1244 				ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245 			natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246 		}
1247 	}
1248 
1249 	err = xfrm_init_state(x);
1250 	if (err)
1251 		goto out;
1252 
1253 	x->km.seq = hdr->sadb_msg_seq;
1254 	return x;
1255 
1256 out:
1257 	x->km.state = XFRM_STATE_DEAD;
1258 	xfrm_state_put(x);
1259 	return ERR_PTR(err);
1260 }
1261 
1262 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1263 {
1264 	return -EOPNOTSUPP;
1265 }
1266 
1267 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1268 {
1269 	struct sk_buff *resp_skb;
1270 	struct sadb_x_sa2 *sa2;
1271 	struct sadb_address *saddr, *daddr;
1272 	struct sadb_msg *out_hdr;
1273 	struct sadb_spirange *range;
1274 	struct xfrm_state *x = NULL;
1275 	int mode;
1276 	int err;
1277 	u32 min_spi, max_spi;
1278 	u32 reqid;
1279 	u8 proto;
1280 	unsigned short family;
1281 	xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1282 
1283 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1284 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1285 		return -EINVAL;
1286 
1287 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1288 	if (proto == 0)
1289 		return -EINVAL;
1290 
1291 	if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1292 		mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1293 		if (mode < 0)
1294 			return -EINVAL;
1295 		reqid = sa2->sadb_x_sa2_reqid;
1296 	} else {
1297 		mode = 0;
1298 		reqid = 0;
1299 	}
1300 
1301 	saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1302 	daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1303 
1304 	family = ((struct sockaddr *)(saddr + 1))->sa_family;
1305 	switch (family) {
1306 	case AF_INET:
1307 		xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1308 		xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1309 		break;
1310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1311 	case AF_INET6:
1312 		xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1313 		xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1314 		break;
1315 #endif
1316 	}
1317 
1318 	if (hdr->sadb_msg_seq) {
1319 		x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1320 		if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1321 			xfrm_state_put(x);
1322 			x = NULL;
1323 		}
1324 	}
1325 
1326 	if (!x)
1327 		x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1328 
1329 	if (x == NULL)
1330 		return -ENOENT;
1331 
1332 	min_spi = 0x100;
1333 	max_spi = 0x0fffffff;
1334 
1335 	range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1336 	if (range) {
1337 		min_spi = range->sadb_spirange_min;
1338 		max_spi = range->sadb_spirange_max;
1339 	}
1340 
1341 	err = xfrm_alloc_spi(x, min_spi, max_spi);
1342 	resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1343 
1344 	if (IS_ERR(resp_skb)) {
1345 		xfrm_state_put(x);
1346 		return  PTR_ERR(resp_skb);
1347 	}
1348 
1349 	out_hdr = (struct sadb_msg *) resp_skb->data;
1350 	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1351 	out_hdr->sadb_msg_type = SADB_GETSPI;
1352 	out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1353 	out_hdr->sadb_msg_errno = 0;
1354 	out_hdr->sadb_msg_reserved = 0;
1355 	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1356 	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1357 
1358 	xfrm_state_put(x);
1359 
1360 	pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1361 
1362 	return 0;
1363 }
1364 
1365 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1366 {
1367 	struct xfrm_state *x;
1368 
1369 	if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1370 		return -EOPNOTSUPP;
1371 
1372 	if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1373 		return 0;
1374 
1375 	x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1376 	if (x == NULL)
1377 		return 0;
1378 
1379 	spin_lock_bh(&x->lock);
1380 	if (x->km.state == XFRM_STATE_ACQ) {
1381 		x->km.state = XFRM_STATE_ERROR;
1382 		wake_up(&km_waitq);
1383 	}
1384 	spin_unlock_bh(&x->lock);
1385 	xfrm_state_put(x);
1386 	return 0;
1387 }
1388 
1389 static inline int event2poltype(int event)
1390 {
1391 	switch (event) {
1392 	case XFRM_MSG_DELPOLICY:
1393 		return SADB_X_SPDDELETE;
1394 	case XFRM_MSG_NEWPOLICY:
1395 		return SADB_X_SPDADD;
1396 	case XFRM_MSG_UPDPOLICY:
1397 		return SADB_X_SPDUPDATE;
1398 	case XFRM_MSG_POLEXPIRE:
1399 	//	return SADB_X_SPDEXPIRE;
1400 	default:
1401 		printk("pfkey: Unknown policy event %d\n", event);
1402 		break;
1403 	}
1404 
1405 	return 0;
1406 }
1407 
1408 static inline int event2keytype(int event)
1409 {
1410 	switch (event) {
1411 	case XFRM_MSG_DELSA:
1412 		return SADB_DELETE;
1413 	case XFRM_MSG_NEWSA:
1414 		return SADB_ADD;
1415 	case XFRM_MSG_UPDSA:
1416 		return SADB_UPDATE;
1417 	case XFRM_MSG_EXPIRE:
1418 		return SADB_EXPIRE;
1419 	default:
1420 		printk("pfkey: Unknown SA event %d\n", event);
1421 		break;
1422 	}
1423 
1424 	return 0;
1425 }
1426 
1427 /* ADD/UPD/DEL */
1428 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1429 {
1430 	struct sk_buff *skb;
1431 	struct sadb_msg *hdr;
1432 
1433 	skb = pfkey_xfrm_state2msg(x);
1434 
1435 	if (IS_ERR(skb))
1436 		return PTR_ERR(skb);
1437 
1438 	hdr = (struct sadb_msg *) skb->data;
1439 	hdr->sadb_msg_version = PF_KEY_V2;
1440 	hdr->sadb_msg_type = event2keytype(c->event);
1441 	hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1442 	hdr->sadb_msg_errno = 0;
1443 	hdr->sadb_msg_reserved = 0;
1444 	hdr->sadb_msg_seq = c->seq;
1445 	hdr->sadb_msg_pid = c->pid;
1446 
1447 	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1448 
1449 	return 0;
1450 }
1451 
1452 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1453 {
1454 	struct xfrm_state *x;
1455 	int err;
1456 	struct km_event c;
1457 
1458 	x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1459 	if (IS_ERR(x))
1460 		return PTR_ERR(x);
1461 
1462 	xfrm_state_hold(x);
1463 	if (hdr->sadb_msg_type == SADB_ADD)
1464 		err = xfrm_state_add(x);
1465 	else
1466 		err = xfrm_state_update(x);
1467 
1468 	xfrm_audit_state_add(x, err ? 0 : 1,
1469 			     audit_get_loginuid(current), 0);
1470 
1471 	if (err < 0) {
1472 		x->km.state = XFRM_STATE_DEAD;
1473 		__xfrm_state_put(x);
1474 		goto out;
1475 	}
1476 
1477 	if (hdr->sadb_msg_type == SADB_ADD)
1478 		c.event = XFRM_MSG_NEWSA;
1479 	else
1480 		c.event = XFRM_MSG_UPDSA;
1481 	c.seq = hdr->sadb_msg_seq;
1482 	c.pid = hdr->sadb_msg_pid;
1483 	km_state_notify(x, &c);
1484 out:
1485 	xfrm_state_put(x);
1486 	return err;
1487 }
1488 
1489 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1490 {
1491 	struct xfrm_state *x;
1492 	struct km_event c;
1493 	int err;
1494 
1495 	if (!ext_hdrs[SADB_EXT_SA-1] ||
1496 	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1497 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1498 		return -EINVAL;
1499 
1500 	x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1501 	if (x == NULL)
1502 		return -ESRCH;
1503 
1504 	if ((err = security_xfrm_state_delete(x)))
1505 		goto out;
1506 
1507 	if (xfrm_state_kern(x)) {
1508 		err = -EPERM;
1509 		goto out;
1510 	}
1511 
1512 	err = xfrm_state_delete(x);
1513 
1514 	if (err < 0)
1515 		goto out;
1516 
1517 	c.seq = hdr->sadb_msg_seq;
1518 	c.pid = hdr->sadb_msg_pid;
1519 	c.event = XFRM_MSG_DELSA;
1520 	km_state_notify(x, &c);
1521 out:
1522 	xfrm_audit_state_delete(x, err ? 0 : 1,
1523 			       audit_get_loginuid(current), 0);
1524 	xfrm_state_put(x);
1525 
1526 	return err;
1527 }
1528 
1529 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1530 {
1531 	__u8 proto;
1532 	struct sk_buff *out_skb;
1533 	struct sadb_msg *out_hdr;
1534 	struct xfrm_state *x;
1535 
1536 	if (!ext_hdrs[SADB_EXT_SA-1] ||
1537 	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539 		return -EINVAL;
1540 
1541 	x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542 	if (x == NULL)
1543 		return -ESRCH;
1544 
1545 	out_skb = pfkey_xfrm_state2msg(x);
1546 	proto = x->id.proto;
1547 	xfrm_state_put(x);
1548 	if (IS_ERR(out_skb))
1549 		return  PTR_ERR(out_skb);
1550 
1551 	out_hdr = (struct sadb_msg *) out_skb->data;
1552 	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1553 	out_hdr->sadb_msg_type = SADB_GET;
1554 	out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1555 	out_hdr->sadb_msg_errno = 0;
1556 	out_hdr->sadb_msg_reserved = 0;
1557 	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1558 	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1559 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1560 
1561 	return 0;
1562 }
1563 
1564 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1565 					      gfp_t allocation)
1566 {
1567 	struct sk_buff *skb;
1568 	struct sadb_msg *hdr;
1569 	int len, auth_len, enc_len, i;
1570 
1571 	auth_len = xfrm_count_auth_supported();
1572 	if (auth_len) {
1573 		auth_len *= sizeof(struct sadb_alg);
1574 		auth_len += sizeof(struct sadb_supported);
1575 	}
1576 
1577 	enc_len = xfrm_count_enc_supported();
1578 	if (enc_len) {
1579 		enc_len *= sizeof(struct sadb_alg);
1580 		enc_len += sizeof(struct sadb_supported);
1581 	}
1582 
1583 	len = enc_len + auth_len + sizeof(struct sadb_msg);
1584 
1585 	skb = alloc_skb(len + 16, allocation);
1586 	if (!skb)
1587 		goto out_put_algs;
1588 
1589 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1590 	pfkey_hdr_dup(hdr, orig);
1591 	hdr->sadb_msg_errno = 0;
1592 	hdr->sadb_msg_len = len / sizeof(uint64_t);
1593 
1594 	if (auth_len) {
1595 		struct sadb_supported *sp;
1596 		struct sadb_alg *ap;
1597 
1598 		sp = (struct sadb_supported *) skb_put(skb, auth_len);
1599 		ap = (struct sadb_alg *) (sp + 1);
1600 
1601 		sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1602 		sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1603 
1604 		for (i = 0; ; i++) {
1605 			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1606 			if (!aalg)
1607 				break;
1608 			if (aalg->available)
1609 				*ap++ = aalg->desc;
1610 		}
1611 	}
1612 
1613 	if (enc_len) {
1614 		struct sadb_supported *sp;
1615 		struct sadb_alg *ap;
1616 
1617 		sp = (struct sadb_supported *) skb_put(skb, enc_len);
1618 		ap = (struct sadb_alg *) (sp + 1);
1619 
1620 		sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1621 		sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1622 
1623 		for (i = 0; ; i++) {
1624 			struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1625 			if (!ealg)
1626 				break;
1627 			if (ealg->available)
1628 				*ap++ = ealg->desc;
1629 		}
1630 	}
1631 
1632 out_put_algs:
1633 	return skb;
1634 }
1635 
1636 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637 {
1638 	struct pfkey_sock *pfk = pfkey_sk(sk);
1639 	struct sk_buff *supp_skb;
1640 
1641 	if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1642 		return -EINVAL;
1643 
1644 	if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1645 		if (pfk->registered&(1<<hdr->sadb_msg_satype))
1646 			return -EEXIST;
1647 		pfk->registered |= (1<<hdr->sadb_msg_satype);
1648 	}
1649 
1650 	xfrm_probe_algs();
1651 
1652 	supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1653 	if (!supp_skb) {
1654 		if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1655 			pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1656 
1657 		return -ENOBUFS;
1658 	}
1659 
1660 	pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1661 
1662 	return 0;
1663 }
1664 
1665 static int key_notify_sa_flush(struct km_event *c)
1666 {
1667 	struct sk_buff *skb;
1668 	struct sadb_msg *hdr;
1669 
1670 	skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1671 	if (!skb)
1672 		return -ENOBUFS;
1673 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1674 	hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1675 	hdr->sadb_msg_type = SADB_FLUSH;
1676 	hdr->sadb_msg_seq = c->seq;
1677 	hdr->sadb_msg_pid = c->pid;
1678 	hdr->sadb_msg_version = PF_KEY_V2;
1679 	hdr->sadb_msg_errno = (uint8_t) 0;
1680 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1681 
1682 	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1683 
1684 	return 0;
1685 }
1686 
1687 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1688 {
1689 	unsigned proto;
1690 	struct km_event c;
1691 	struct xfrm_audit audit_info;
1692 	int err;
1693 
1694 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1695 	if (proto == 0)
1696 		return -EINVAL;
1697 
1698 	audit_info.loginuid = audit_get_loginuid(current);
1699 	audit_info.secid = 0;
1700 	err = xfrm_state_flush(proto, &audit_info);
1701 	if (err)
1702 		return err;
1703 	c.data.proto = proto;
1704 	c.seq = hdr->sadb_msg_seq;
1705 	c.pid = hdr->sadb_msg_pid;
1706 	c.event = XFRM_MSG_FLUSHSA;
1707 	km_state_notify(NULL, &c);
1708 
1709 	return 0;
1710 }
1711 
1712 struct pfkey_dump_data
1713 {
1714 	struct sk_buff *skb;
1715 	struct sadb_msg *hdr;
1716 	struct sock *sk;
1717 };
1718 
1719 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1720 {
1721 	struct pfkey_dump_data *data = ptr;
1722 	struct sk_buff *out_skb;
1723 	struct sadb_msg *out_hdr;
1724 
1725 	out_skb = pfkey_xfrm_state2msg(x);
1726 	if (IS_ERR(out_skb))
1727 		return PTR_ERR(out_skb);
1728 
1729 	out_hdr = (struct sadb_msg *) out_skb->data;
1730 	out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1731 	out_hdr->sadb_msg_type = SADB_DUMP;
1732 	out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1733 	out_hdr->sadb_msg_errno = 0;
1734 	out_hdr->sadb_msg_reserved = 0;
1735 	out_hdr->sadb_msg_seq = count;
1736 	out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1737 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1738 	return 0;
1739 }
1740 
1741 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1742 {
1743 	u8 proto;
1744 	struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1745 
1746 	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1747 	if (proto == 0)
1748 		return -EINVAL;
1749 
1750 	return xfrm_state_walk(proto, dump_sa, &data);
1751 }
1752 
1753 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1754 {
1755 	struct pfkey_sock *pfk = pfkey_sk(sk);
1756 	int satype = hdr->sadb_msg_satype;
1757 
1758 	if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1759 		/* XXX we mangle packet... */
1760 		hdr->sadb_msg_errno = 0;
1761 		if (satype != 0 && satype != 1)
1762 			return -EINVAL;
1763 		pfk->promisc = satype;
1764 	}
1765 	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1766 	return 0;
1767 }
1768 
1769 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1770 {
1771 	int i;
1772 	u32 reqid = *(u32*)ptr;
1773 
1774 	for (i=0; i<xp->xfrm_nr; i++) {
1775 		if (xp->xfrm_vec[i].reqid == reqid)
1776 			return -EEXIST;
1777 	}
1778 	return 0;
1779 }
1780 
1781 static u32 gen_reqid(void)
1782 {
1783 	u32 start;
1784 	static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1785 
1786 	start = reqid;
1787 	do {
1788 		++reqid;
1789 		if (reqid == 0)
1790 			reqid = IPSEC_MANUAL_REQID_MAX+1;
1791 		if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1792 				     (void*)&reqid) != -EEXIST)
1793 			return reqid;
1794 	} while (reqid != start);
1795 	return 0;
1796 }
1797 
1798 static int
1799 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1800 {
1801 	struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1802 	struct sockaddr_in *sin;
1803 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1804 	struct sockaddr_in6 *sin6;
1805 #endif
1806 	int mode;
1807 
1808 	if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1809 		return -ELOOP;
1810 
1811 	if (rq->sadb_x_ipsecrequest_mode == 0)
1812 		return -EINVAL;
1813 
1814 	t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1815 	if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1816 		return -EINVAL;
1817 	t->mode = mode;
1818 	if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1819 		t->optional = 1;
1820 	else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1821 		t->reqid = rq->sadb_x_ipsecrequest_reqid;
1822 		if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1823 			t->reqid = 0;
1824 		if (!t->reqid && !(t->reqid = gen_reqid()))
1825 			return -ENOBUFS;
1826 	}
1827 
1828 	/* addresses present only in tunnel mode */
1829 	if (t->mode == XFRM_MODE_TUNNEL) {
1830 		struct sockaddr *sa;
1831 		sa = (struct sockaddr *)(rq+1);
1832 		switch(sa->sa_family) {
1833 		case AF_INET:
1834 			sin = (struct sockaddr_in*)sa;
1835 			t->saddr.a4 = sin->sin_addr.s_addr;
1836 			sin++;
1837 			if (sin->sin_family != AF_INET)
1838 				return -EINVAL;
1839 			t->id.daddr.a4 = sin->sin_addr.s_addr;
1840 			break;
1841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1842 		case AF_INET6:
1843 			sin6 = (struct sockaddr_in6*)sa;
1844 			memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1845 			sin6++;
1846 			if (sin6->sin6_family != AF_INET6)
1847 				return -EINVAL;
1848 			memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1849 			break;
1850 #endif
1851 		default:
1852 			return -EINVAL;
1853 		}
1854 		t->encap_family = sa->sa_family;
1855 	} else
1856 		t->encap_family = xp->family;
1857 
1858 	/* No way to set this via kame pfkey */
1859 	t->aalgos = t->ealgos = t->calgos = ~0;
1860 	xp->xfrm_nr++;
1861 	return 0;
1862 }
1863 
1864 static int
1865 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1866 {
1867 	int err;
1868 	int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1869 	struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1870 
1871 	while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1872 		if ((err = parse_ipsecrequest(xp, rq)) < 0)
1873 			return err;
1874 		len -= rq->sadb_x_ipsecrequest_len;
1875 		rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1876 	}
1877 	return 0;
1878 }
1879 
1880 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1881 {
1882   struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1883 
1884 	if (xfrm_ctx) {
1885 		int len = sizeof(struct sadb_x_sec_ctx);
1886 		len += xfrm_ctx->ctx_len;
1887 		return PFKEY_ALIGN8(len);
1888 	}
1889 	return 0;
1890 }
1891 
1892 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1893 {
1894 	struct xfrm_tmpl *t;
1895 	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1896 	int socklen = 0;
1897 	int i;
1898 
1899 	for (i=0; i<xp->xfrm_nr; i++) {
1900 		t = xp->xfrm_vec + i;
1901 		socklen += (t->encap_family == AF_INET ?
1902 			    sizeof(struct sockaddr_in) :
1903 			    sizeof(struct sockaddr_in6));
1904 	}
1905 
1906 	return sizeof(struct sadb_msg) +
1907 		(sizeof(struct sadb_lifetime) * 3) +
1908 		(sizeof(struct sadb_address) * 2) +
1909 		(sockaddr_size * 2) +
1910 		sizeof(struct sadb_x_policy) +
1911 		(xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1912 		(socklen * 2) +
1913 		pfkey_xfrm_policy2sec_ctx_size(xp);
1914 }
1915 
1916 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1917 {
1918 	struct sk_buff *skb;
1919 	int size;
1920 
1921 	size = pfkey_xfrm_policy2msg_size(xp);
1922 
1923 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
1924 	if (skb == NULL)
1925 		return ERR_PTR(-ENOBUFS);
1926 
1927 	return skb;
1928 }
1929 
1930 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1931 {
1932 	struct sadb_msg *hdr;
1933 	struct sadb_address *addr;
1934 	struct sadb_lifetime *lifetime;
1935 	struct sadb_x_policy *pol;
1936 	struct sockaddr_in   *sin;
1937 	struct sadb_x_sec_ctx *sec_ctx;
1938 	struct xfrm_sec_ctx *xfrm_ctx;
1939 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1940 	struct sockaddr_in6  *sin6;
1941 #endif
1942 	int i;
1943 	int size;
1944 	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1945 	int socklen = (xp->family == AF_INET ?
1946 		       sizeof(struct sockaddr_in) :
1947 		       sizeof(struct sockaddr_in6));
1948 
1949 	size = pfkey_xfrm_policy2msg_size(xp);
1950 
1951 	/* call should fill header later */
1952 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1953 	memset(hdr, 0, size);	/* XXX do we need this ? */
1954 
1955 	/* src address */
1956 	addr = (struct sadb_address*) skb_put(skb,
1957 					      sizeof(struct sadb_address)+sockaddr_size);
1958 	addr->sadb_address_len =
1959 		(sizeof(struct sadb_address)+sockaddr_size)/
1960 			sizeof(uint64_t);
1961 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1962 	addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1963 	addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1964 	addr->sadb_address_reserved = 0;
1965 	/* src address */
1966 	if (xp->family == AF_INET) {
1967 		sin = (struct sockaddr_in *) (addr + 1);
1968 		sin->sin_family = AF_INET;
1969 		sin->sin_addr.s_addr = xp->selector.saddr.a4;
1970 		sin->sin_port = xp->selector.sport;
1971 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1972 	}
1973 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1974 	else if (xp->family == AF_INET6) {
1975 		sin6 = (struct sockaddr_in6 *) (addr + 1);
1976 		sin6->sin6_family = AF_INET6;
1977 		sin6->sin6_port = xp->selector.sport;
1978 		sin6->sin6_flowinfo = 0;
1979 		memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1980 		       sizeof(struct in6_addr));
1981 		sin6->sin6_scope_id = 0;
1982 	}
1983 #endif
1984 	else
1985 		BUG();
1986 
1987 	/* dst address */
1988 	addr = (struct sadb_address*) skb_put(skb,
1989 					      sizeof(struct sadb_address)+sockaddr_size);
1990 	addr->sadb_address_len =
1991 		(sizeof(struct sadb_address)+sockaddr_size)/
1992 			sizeof(uint64_t);
1993 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1994 	addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1995 	addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1996 	addr->sadb_address_reserved = 0;
1997 	if (xp->family == AF_INET) {
1998 		sin = (struct sockaddr_in *) (addr + 1);
1999 		sin->sin_family = AF_INET;
2000 		sin->sin_addr.s_addr = xp->selector.daddr.a4;
2001 		sin->sin_port = xp->selector.dport;
2002 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2003 	}
2004 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2005 	else if (xp->family == AF_INET6) {
2006 		sin6 = (struct sockaddr_in6 *) (addr + 1);
2007 		sin6->sin6_family = AF_INET6;
2008 		sin6->sin6_port = xp->selector.dport;
2009 		sin6->sin6_flowinfo = 0;
2010 		memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2011 		       sizeof(struct in6_addr));
2012 		sin6->sin6_scope_id = 0;
2013 	}
2014 #endif
2015 	else
2016 		BUG();
2017 
2018 	/* hard time */
2019 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
2020 						     sizeof(struct sadb_lifetime));
2021 	lifetime->sadb_lifetime_len =
2022 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2023 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2024 	lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
2025 	lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2026 	lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2027 	lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2028 	/* soft time */
2029 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
2030 						     sizeof(struct sadb_lifetime));
2031 	lifetime->sadb_lifetime_len =
2032 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2033 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2034 	lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
2035 	lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2036 	lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2037 	lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2038 	/* current time */
2039 	lifetime = (struct sadb_lifetime *)  skb_put(skb,
2040 						     sizeof(struct sadb_lifetime));
2041 	lifetime->sadb_lifetime_len =
2042 		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2043 	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2044 	lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2045 	lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2046 	lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2047 	lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2048 
2049 	pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
2050 	pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2051 	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2052 	pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2053 	if (xp->action == XFRM_POLICY_ALLOW) {
2054 		if (xp->xfrm_nr)
2055 			pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2056 		else
2057 			pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2058 	}
2059 	pol->sadb_x_policy_dir = dir+1;
2060 	pol->sadb_x_policy_id = xp->index;
2061 	pol->sadb_x_policy_priority = xp->priority;
2062 
2063 	for (i=0; i<xp->xfrm_nr; i++) {
2064 		struct sadb_x_ipsecrequest *rq;
2065 		struct xfrm_tmpl *t = xp->xfrm_vec + i;
2066 		int req_size;
2067 		int mode;
2068 
2069 		req_size = sizeof(struct sadb_x_ipsecrequest);
2070 		if (t->mode == XFRM_MODE_TUNNEL)
2071 			req_size += ((t->encap_family == AF_INET ?
2072 				     sizeof(struct sockaddr_in) :
2073 				     sizeof(struct sockaddr_in6)) * 2);
2074 		else
2075 			size -= 2*socklen;
2076 		rq = (void*)skb_put(skb, req_size);
2077 		pol->sadb_x_policy_len += req_size/8;
2078 		memset(rq, 0, sizeof(*rq));
2079 		rq->sadb_x_ipsecrequest_len = req_size;
2080 		rq->sadb_x_ipsecrequest_proto = t->id.proto;
2081 		if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2082 			return -EINVAL;
2083 		rq->sadb_x_ipsecrequest_mode = mode;
2084 		rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2085 		if (t->reqid)
2086 			rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2087 		if (t->optional)
2088 			rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2089 		rq->sadb_x_ipsecrequest_reqid = t->reqid;
2090 		if (t->mode == XFRM_MODE_TUNNEL) {
2091 			switch (t->encap_family) {
2092 			case AF_INET:
2093 				sin = (void*)(rq+1);
2094 				sin->sin_family = AF_INET;
2095 				sin->sin_addr.s_addr = t->saddr.a4;
2096 				sin->sin_port = 0;
2097 				memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2098 				sin++;
2099 				sin->sin_family = AF_INET;
2100 				sin->sin_addr.s_addr = t->id.daddr.a4;
2101 				sin->sin_port = 0;
2102 				memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2103 				break;
2104 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2105 			case AF_INET6:
2106 				sin6 = (void*)(rq+1);
2107 				sin6->sin6_family = AF_INET6;
2108 				sin6->sin6_port = 0;
2109 				sin6->sin6_flowinfo = 0;
2110 				memcpy(&sin6->sin6_addr, t->saddr.a6,
2111 				       sizeof(struct in6_addr));
2112 				sin6->sin6_scope_id = 0;
2113 
2114 				sin6++;
2115 				sin6->sin6_family = AF_INET6;
2116 				sin6->sin6_port = 0;
2117 				sin6->sin6_flowinfo = 0;
2118 				memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2119 				       sizeof(struct in6_addr));
2120 				sin6->sin6_scope_id = 0;
2121 				break;
2122 #endif
2123 			default:
2124 				break;
2125 			}
2126 		}
2127 	}
2128 
2129 	/* security context */
2130 	if ((xfrm_ctx = xp->security)) {
2131 		int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2132 
2133 		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2134 		sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2135 		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2136 		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2137 		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2138 		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2139 		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2140 		       xfrm_ctx->ctx_len);
2141 	}
2142 
2143 	hdr->sadb_msg_len = size / sizeof(uint64_t);
2144 	hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2145 
2146 	return 0;
2147 }
2148 
2149 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2150 {
2151 	struct sk_buff *out_skb;
2152 	struct sadb_msg *out_hdr;
2153 	int err;
2154 
2155 	out_skb = pfkey_xfrm_policy2msg_prep(xp);
2156 	if (IS_ERR(out_skb)) {
2157 		err = PTR_ERR(out_skb);
2158 		goto out;
2159 	}
2160 	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2161 	if (err < 0)
2162 		return err;
2163 
2164 	out_hdr = (struct sadb_msg *) out_skb->data;
2165 	out_hdr->sadb_msg_version = PF_KEY_V2;
2166 
2167 	if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2168 		out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2169 	else
2170 		out_hdr->sadb_msg_type = event2poltype(c->event);
2171 	out_hdr->sadb_msg_errno = 0;
2172 	out_hdr->sadb_msg_seq = c->seq;
2173 	out_hdr->sadb_msg_pid = c->pid;
2174 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2175 out:
2176 	return 0;
2177 
2178 }
2179 
2180 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2181 {
2182 	int err = 0;
2183 	struct sadb_lifetime *lifetime;
2184 	struct sadb_address *sa;
2185 	struct sadb_x_policy *pol;
2186 	struct xfrm_policy *xp;
2187 	struct km_event c;
2188 	struct sadb_x_sec_ctx *sec_ctx;
2189 
2190 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2191 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2192 	    !ext_hdrs[SADB_X_EXT_POLICY-1])
2193 		return -EINVAL;
2194 
2195 	pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2196 	if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2197 		return -EINVAL;
2198 	if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2199 		return -EINVAL;
2200 
2201 	xp = xfrm_policy_alloc(GFP_KERNEL);
2202 	if (xp == NULL)
2203 		return -ENOBUFS;
2204 
2205 	xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2206 		      XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2207 	xp->priority = pol->sadb_x_policy_priority;
2208 
2209 	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2210 	xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2211 	if (!xp->family) {
2212 		err = -EINVAL;
2213 		goto out;
2214 	}
2215 	xp->selector.family = xp->family;
2216 	xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2217 	xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2218 	xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2219 	if (xp->selector.sport)
2220 		xp->selector.sport_mask = htons(0xffff);
2221 
2222 	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2223 	pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2224 	xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2225 
2226 	/* Amusing, we set this twice.  KAME apps appear to set same value
2227 	 * in both addresses.
2228 	 */
2229 	xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2230 
2231 	xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2232 	if (xp->selector.dport)
2233 		xp->selector.dport_mask = htons(0xffff);
2234 
2235 	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2236 	if (sec_ctx != NULL) {
2237 		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2238 
2239 		if (!uctx) {
2240 			err = -ENOBUFS;
2241 			goto out;
2242 		}
2243 
2244 		err = security_xfrm_policy_alloc(xp, uctx);
2245 		kfree(uctx);
2246 
2247 		if (err)
2248 			goto out;
2249 	}
2250 
2251 	xp->lft.soft_byte_limit = XFRM_INF;
2252 	xp->lft.hard_byte_limit = XFRM_INF;
2253 	xp->lft.soft_packet_limit = XFRM_INF;
2254 	xp->lft.hard_packet_limit = XFRM_INF;
2255 	if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2256 		xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2257 		xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2258 		xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2259 		xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2260 	}
2261 	if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2262 		xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2263 		xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2264 		xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2265 		xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2266 	}
2267 	xp->xfrm_nr = 0;
2268 	if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2269 	    (err = parse_ipsecrequests(xp, pol)) < 0)
2270 		goto out;
2271 
2272 	err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2273 				 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2274 
2275 	xfrm_audit_policy_add(xp, err ? 0 : 1,
2276 			     audit_get_loginuid(current), 0);
2277 
2278 	if (err)
2279 		goto out;
2280 
2281 	if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2282 		c.event = XFRM_MSG_UPDPOLICY;
2283 	else
2284 		c.event = XFRM_MSG_NEWPOLICY;
2285 
2286 	c.seq = hdr->sadb_msg_seq;
2287 	c.pid = hdr->sadb_msg_pid;
2288 
2289 	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2290 	xfrm_pol_put(xp);
2291 	return 0;
2292 
2293 out:
2294 	xfrm_policy_destroy(xp);
2295 	return err;
2296 }
2297 
2298 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2299 {
2300 	int err;
2301 	struct sadb_address *sa;
2302 	struct sadb_x_policy *pol;
2303 	struct xfrm_policy *xp, tmp;
2304 	struct xfrm_selector sel;
2305 	struct km_event c;
2306 	struct sadb_x_sec_ctx *sec_ctx;
2307 
2308 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2309 				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2310 	    !ext_hdrs[SADB_X_EXT_POLICY-1])
2311 		return -EINVAL;
2312 
2313 	pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2314 	if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2315 		return -EINVAL;
2316 
2317 	memset(&sel, 0, sizeof(sel));
2318 
2319 	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2320 	sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2321 	sel.prefixlen_s = sa->sadb_address_prefixlen;
2322 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2323 	sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2324 	if (sel.sport)
2325 		sel.sport_mask = htons(0xffff);
2326 
2327 	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2328 	pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2329 	sel.prefixlen_d = sa->sadb_address_prefixlen;
2330 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2331 	sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2332 	if (sel.dport)
2333 		sel.dport_mask = htons(0xffff);
2334 
2335 	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2336 	memset(&tmp, 0, sizeof(struct xfrm_policy));
2337 
2338 	if (sec_ctx != NULL) {
2339 		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2340 
2341 		if (!uctx)
2342 			return -ENOMEM;
2343 
2344 		err = security_xfrm_policy_alloc(&tmp, uctx);
2345 		kfree(uctx);
2346 
2347 		if (err)
2348 			return err;
2349 	}
2350 
2351 	xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2352 				   &sel, tmp.security, 1, &err);
2353 	security_xfrm_policy_free(&tmp);
2354 
2355 	if (xp == NULL)
2356 		return -ENOENT;
2357 
2358 	xfrm_audit_policy_delete(xp, err ? 0 : 1,
2359 				audit_get_loginuid(current), 0);
2360 
2361 	if (err)
2362 		goto out;
2363 
2364 	c.seq = hdr->sadb_msg_seq;
2365 	c.pid = hdr->sadb_msg_pid;
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);
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 	switch (family) {
2408 	case AF_INET:
2409 		return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2410 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2411 	case AF_INET6:
2412 		return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2413 #endif
2414 	default:
2415 		return 0;
2416 	}
2417 	/* NOTREACHED */
2418 }
2419 
2420 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2421 			       xfrm_address_t *saddr, xfrm_address_t *daddr,
2422 			       u16 *family)
2423 {
2424 	struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2425 	if (rq->sadb_x_ipsecrequest_len <
2426 	    pfkey_sockaddr_pair_size(sa->sa_family))
2427 		return -EINVAL;
2428 
2429 	switch (sa->sa_family) {
2430 	case AF_INET:
2431 		{
2432 			struct sockaddr_in *sin;
2433 			sin = (struct sockaddr_in *)sa;
2434 			if ((sin+1)->sin_family != AF_INET)
2435 				return -EINVAL;
2436 			memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2437 			sin++;
2438 			memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2439 			*family = AF_INET;
2440 			break;
2441 		}
2442 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2443 	case AF_INET6:
2444 		{
2445 			struct sockaddr_in6 *sin6;
2446 			sin6 = (struct sockaddr_in6 *)sa;
2447 			if ((sin6+1)->sin6_family != AF_INET6)
2448 				return -EINVAL;
2449 			memcpy(&saddr->a6, &sin6->sin6_addr,
2450 			       sizeof(saddr->a6));
2451 			sin6++;
2452 			memcpy(&daddr->a6, &sin6->sin6_addr,
2453 			       sizeof(daddr->a6));
2454 			*family = AF_INET6;
2455 			break;
2456 		}
2457 #endif
2458 	default:
2459 		return -EINVAL;
2460 	}
2461 
2462 	return 0;
2463 }
2464 
2465 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2466 				    struct xfrm_migrate *m)
2467 {
2468 	int err;
2469 	struct sadb_x_ipsecrequest *rq2;
2470 	int mode;
2471 
2472 	if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2473 	    len < rq1->sadb_x_ipsecrequest_len)
2474 		return -EINVAL;
2475 
2476 	/* old endoints */
2477 	err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2478 				  &m->old_family);
2479 	if (err)
2480 		return err;
2481 
2482 	rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2483 	len -= rq1->sadb_x_ipsecrequest_len;
2484 
2485 	if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2486 	    len < rq2->sadb_x_ipsecrequest_len)
2487 		return -EINVAL;
2488 
2489 	/* new endpoints */
2490 	err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2491 				  &m->new_family);
2492 	if (err)
2493 		return err;
2494 
2495 	if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2496 	    rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2497 	    rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2498 		return -EINVAL;
2499 
2500 	m->proto = rq1->sadb_x_ipsecrequest_proto;
2501 	if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2502 		return -EINVAL;
2503 	m->mode = mode;
2504 	m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2505 
2506 	return ((int)(rq1->sadb_x_ipsecrequest_len +
2507 		      rq2->sadb_x_ipsecrequest_len));
2508 }
2509 
2510 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2511 			 struct sadb_msg *hdr, void **ext_hdrs)
2512 {
2513 	int i, len, ret, err = -EINVAL;
2514 	u8 dir;
2515 	struct sadb_address *sa;
2516 	struct sadb_x_policy *pol;
2517 	struct sadb_x_ipsecrequest *rq;
2518 	struct xfrm_selector sel;
2519 	struct xfrm_migrate m[XFRM_MAX_DEPTH];
2520 
2521 	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2522 	    ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2523 	    !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2524 		err = -EINVAL;
2525 		goto out;
2526 	}
2527 
2528 	pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2529 	if (!pol) {
2530 		err = -EINVAL;
2531 		goto out;
2532 	}
2533 
2534 	if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2535 		err = -EINVAL;
2536 		goto out;
2537 	}
2538 
2539 	dir = pol->sadb_x_policy_dir - 1;
2540 	memset(&sel, 0, sizeof(sel));
2541 
2542 	/* set source address info of selector */
2543 	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2544 	sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2545 	sel.prefixlen_s = sa->sadb_address_prefixlen;
2546 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2547 	sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2548 	if (sel.sport)
2549 		sel.sport_mask = htons(0xffff);
2550 
2551 	/* set destination address info of selector */
2552 	sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2553 	pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2554 	sel.prefixlen_d = sa->sadb_address_prefixlen;
2555 	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2556 	sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2557 	if (sel.dport)
2558 		sel.dport_mask = htons(0xffff);
2559 
2560 	rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2561 
2562 	/* extract ipsecrequests */
2563 	i = 0;
2564 	len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2565 
2566 	while (len > 0 && i < XFRM_MAX_DEPTH) {
2567 		ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2568 		if (ret < 0) {
2569 			err = ret;
2570 			goto out;
2571 		} else {
2572 			rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2573 			len -= ret;
2574 			i++;
2575 		}
2576 	}
2577 
2578 	if (!i || len > 0) {
2579 		err = -EINVAL;
2580 		goto out;
2581 	}
2582 
2583 	return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2584 
2585  out:
2586 	return err;
2587 }
2588 #else
2589 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2590 			 struct sadb_msg *hdr, void **ext_hdrs)
2591 {
2592 	return -ENOPROTOOPT;
2593 }
2594 #endif
2595 
2596 
2597 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2598 {
2599 	unsigned int dir;
2600 	int err = 0, delete;
2601 	struct sadb_x_policy *pol;
2602 	struct xfrm_policy *xp;
2603 	struct km_event c;
2604 
2605 	if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2606 		return -EINVAL;
2607 
2608 	dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2609 	if (dir >= XFRM_POLICY_MAX)
2610 		return -EINVAL;
2611 
2612 	delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2613 	xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2614 			      delete, &err);
2615 	if (xp == NULL)
2616 		return -ENOENT;
2617 
2618 	if (delete) {
2619 		xfrm_audit_policy_delete(xp, err ? 0 : 1,
2620 				audit_get_loginuid(current), 0);
2621 
2622 		if (err)
2623 			goto out;
2624 		c.seq = hdr->sadb_msg_seq;
2625 		c.pid = hdr->sadb_msg_pid;
2626 		c.data.byid = 1;
2627 		c.event = XFRM_MSG_DELPOLICY;
2628 		km_policy_notify(xp, dir, &c);
2629 	} else {
2630 		err = key_pol_get_resp(sk, xp, hdr, dir);
2631 	}
2632 
2633 out:
2634 	xfrm_pol_put(xp);
2635 	return err;
2636 }
2637 
2638 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2639 {
2640 	struct pfkey_dump_data *data = ptr;
2641 	struct sk_buff *out_skb;
2642 	struct sadb_msg *out_hdr;
2643 	int err;
2644 
2645 	out_skb = pfkey_xfrm_policy2msg_prep(xp);
2646 	if (IS_ERR(out_skb))
2647 		return PTR_ERR(out_skb);
2648 
2649 	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2650 	if (err < 0)
2651 		return err;
2652 
2653 	out_hdr = (struct sadb_msg *) out_skb->data;
2654 	out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2655 	out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2656 	out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2657 	out_hdr->sadb_msg_errno = 0;
2658 	out_hdr->sadb_msg_seq = count;
2659 	out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2660 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2661 	return 0;
2662 }
2663 
2664 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2665 {
2666 	struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2667 
2668 	return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2669 }
2670 
2671 static int key_notify_policy_flush(struct km_event *c)
2672 {
2673 	struct sk_buff *skb_out;
2674 	struct sadb_msg *hdr;
2675 
2676 	skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2677 	if (!skb_out)
2678 		return -ENOBUFS;
2679 	hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2680 	hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2681 	hdr->sadb_msg_seq = c->seq;
2682 	hdr->sadb_msg_pid = c->pid;
2683 	hdr->sadb_msg_version = PF_KEY_V2;
2684 	hdr->sadb_msg_errno = (uint8_t) 0;
2685 	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2686 	pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2687 	return 0;
2688 
2689 }
2690 
2691 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2692 {
2693 	struct km_event c;
2694 	struct xfrm_audit audit_info;
2695 	int err;
2696 
2697 	audit_info.loginuid = audit_get_loginuid(current);
2698 	audit_info.secid = 0;
2699 	err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2700 	if (err)
2701 		return err;
2702 	c.data.type = XFRM_POLICY_TYPE_MAIN;
2703 	c.event = XFRM_MSG_FLUSHPOLICY;
2704 	c.pid = hdr->sadb_msg_pid;
2705 	c.seq = hdr->sadb_msg_seq;
2706 	km_policy_notify(NULL, 0, &c);
2707 
2708 	return 0;
2709 }
2710 
2711 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2712 			     struct sadb_msg *hdr, void **ext_hdrs);
2713 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2714 	[SADB_RESERVED]		= pfkey_reserved,
2715 	[SADB_GETSPI]		= pfkey_getspi,
2716 	[SADB_UPDATE]		= pfkey_add,
2717 	[SADB_ADD]		= pfkey_add,
2718 	[SADB_DELETE]		= pfkey_delete,
2719 	[SADB_GET]		= pfkey_get,
2720 	[SADB_ACQUIRE]		= pfkey_acquire,
2721 	[SADB_REGISTER]		= pfkey_register,
2722 	[SADB_EXPIRE]		= NULL,
2723 	[SADB_FLUSH]		= pfkey_flush,
2724 	[SADB_DUMP]		= pfkey_dump,
2725 	[SADB_X_PROMISC]	= pfkey_promisc,
2726 	[SADB_X_PCHANGE]	= NULL,
2727 	[SADB_X_SPDUPDATE]	= pfkey_spdadd,
2728 	[SADB_X_SPDADD]		= pfkey_spdadd,
2729 	[SADB_X_SPDDELETE]	= pfkey_spddelete,
2730 	[SADB_X_SPDGET]		= pfkey_spdget,
2731 	[SADB_X_SPDACQUIRE]	= NULL,
2732 	[SADB_X_SPDDUMP]	= pfkey_spddump,
2733 	[SADB_X_SPDFLUSH]	= pfkey_spdflush,
2734 	[SADB_X_SPDSETIDX]	= pfkey_spdadd,
2735 	[SADB_X_SPDDELETE2]	= pfkey_spdget,
2736 	[SADB_X_MIGRATE]	= pfkey_migrate,
2737 };
2738 
2739 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2740 {
2741 	void *ext_hdrs[SADB_EXT_MAX];
2742 	int err;
2743 
2744 	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2745 			BROADCAST_PROMISC_ONLY, NULL);
2746 
2747 	memset(ext_hdrs, 0, sizeof(ext_hdrs));
2748 	err = parse_exthdrs(skb, hdr, ext_hdrs);
2749 	if (!err) {
2750 		err = -EOPNOTSUPP;
2751 		if (pfkey_funcs[hdr->sadb_msg_type])
2752 			err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2753 	}
2754 	return err;
2755 }
2756 
2757 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2758 {
2759 	struct sadb_msg *hdr = NULL;
2760 
2761 	if (skb->len < sizeof(*hdr)) {
2762 		*errp = -EMSGSIZE;
2763 	} else {
2764 		hdr = (struct sadb_msg *) skb->data;
2765 		if (hdr->sadb_msg_version != PF_KEY_V2 ||
2766 		    hdr->sadb_msg_reserved != 0 ||
2767 		    (hdr->sadb_msg_type <= SADB_RESERVED ||
2768 		     hdr->sadb_msg_type > SADB_MAX)) {
2769 			hdr = NULL;
2770 			*errp = -EINVAL;
2771 		} else if (hdr->sadb_msg_len != (skb->len /
2772 						 sizeof(uint64_t)) ||
2773 			   hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2774 						sizeof(uint64_t))) {
2775 			hdr = NULL;
2776 			*errp = -EMSGSIZE;
2777 		} else {
2778 			*errp = 0;
2779 		}
2780 	}
2781 	return hdr;
2782 }
2783 
2784 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2785 {
2786 	unsigned int id = d->desc.sadb_alg_id;
2787 
2788 	if (id >= sizeof(t->aalgos) * 8)
2789 		return 0;
2790 
2791 	return (t->aalgos >> id) & 1;
2792 }
2793 
2794 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2795 {
2796 	unsigned int id = d->desc.sadb_alg_id;
2797 
2798 	if (id >= sizeof(t->ealgos) * 8)
2799 		return 0;
2800 
2801 	return (t->ealgos >> id) & 1;
2802 }
2803 
2804 static int count_ah_combs(struct xfrm_tmpl *t)
2805 {
2806 	int i, sz = 0;
2807 
2808 	for (i = 0; ; i++) {
2809 		struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2810 		if (!aalg)
2811 			break;
2812 		if (aalg_tmpl_set(t, aalg) && aalg->available)
2813 			sz += sizeof(struct sadb_comb);
2814 	}
2815 	return sz + sizeof(struct sadb_prop);
2816 }
2817 
2818 static int count_esp_combs(struct xfrm_tmpl *t)
2819 {
2820 	int i, k, sz = 0;
2821 
2822 	for (i = 0; ; i++) {
2823 		struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2824 		if (!ealg)
2825 			break;
2826 
2827 		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2828 			continue;
2829 
2830 		for (k = 1; ; k++) {
2831 			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2832 			if (!aalg)
2833 				break;
2834 
2835 			if (aalg_tmpl_set(t, aalg) && aalg->available)
2836 				sz += sizeof(struct sadb_comb);
2837 		}
2838 	}
2839 	return sz + sizeof(struct sadb_prop);
2840 }
2841 
2842 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2843 {
2844 	struct sadb_prop *p;
2845 	int i;
2846 
2847 	p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2848 	p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2849 	p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2850 	p->sadb_prop_replay = 32;
2851 	memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2852 
2853 	for (i = 0; ; i++) {
2854 		struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2855 		if (!aalg)
2856 			break;
2857 
2858 		if (aalg_tmpl_set(t, aalg) && aalg->available) {
2859 			struct sadb_comb *c;
2860 			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2861 			memset(c, 0, sizeof(*c));
2862 			p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2863 			c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2864 			c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2865 			c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2866 			c->sadb_comb_hard_addtime = 24*60*60;
2867 			c->sadb_comb_soft_addtime = 20*60*60;
2868 			c->sadb_comb_hard_usetime = 8*60*60;
2869 			c->sadb_comb_soft_usetime = 7*60*60;
2870 		}
2871 	}
2872 }
2873 
2874 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2875 {
2876 	struct sadb_prop *p;
2877 	int i, k;
2878 
2879 	p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2880 	p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2881 	p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2882 	p->sadb_prop_replay = 32;
2883 	memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2884 
2885 	for (i=0; ; i++) {
2886 		struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2887 		if (!ealg)
2888 			break;
2889 
2890 		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2891 			continue;
2892 
2893 		for (k = 1; ; k++) {
2894 			struct sadb_comb *c;
2895 			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2896 			if (!aalg)
2897 				break;
2898 			if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2899 				continue;
2900 			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2901 			memset(c, 0, sizeof(*c));
2902 			p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2903 			c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2904 			c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2905 			c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2906 			c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2907 			c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2908 			c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2909 			c->sadb_comb_hard_addtime = 24*60*60;
2910 			c->sadb_comb_soft_addtime = 20*60*60;
2911 			c->sadb_comb_hard_usetime = 8*60*60;
2912 			c->sadb_comb_soft_usetime = 7*60*60;
2913 		}
2914 	}
2915 }
2916 
2917 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2918 {
2919 	return 0;
2920 }
2921 
2922 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2923 {
2924 	struct sk_buff *out_skb;
2925 	struct sadb_msg *out_hdr;
2926 	int hard;
2927 	int hsc;
2928 
2929 	hard = c->data.hard;
2930 	if (hard)
2931 		hsc = 2;
2932 	else
2933 		hsc = 1;
2934 
2935 	out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2936 	if (IS_ERR(out_skb))
2937 		return PTR_ERR(out_skb);
2938 
2939 	out_hdr = (struct sadb_msg *) out_skb->data;
2940 	out_hdr->sadb_msg_version = PF_KEY_V2;
2941 	out_hdr->sadb_msg_type = SADB_EXPIRE;
2942 	out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2943 	out_hdr->sadb_msg_errno = 0;
2944 	out_hdr->sadb_msg_reserved = 0;
2945 	out_hdr->sadb_msg_seq = 0;
2946 	out_hdr->sadb_msg_pid = 0;
2947 
2948 	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2949 	return 0;
2950 }
2951 
2952 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2953 {
2954 	switch (c->event) {
2955 	case XFRM_MSG_EXPIRE:
2956 		return key_notify_sa_expire(x, c);
2957 	case XFRM_MSG_DELSA:
2958 	case XFRM_MSG_NEWSA:
2959 	case XFRM_MSG_UPDSA:
2960 		return key_notify_sa(x, c);
2961 	case XFRM_MSG_FLUSHSA:
2962 		return key_notify_sa_flush(c);
2963 	case XFRM_MSG_NEWAE: /* not yet supported */
2964 		break;
2965 	default:
2966 		printk("pfkey: Unknown SA event %d\n", c->event);
2967 		break;
2968 	}
2969 
2970 	return 0;
2971 }
2972 
2973 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2974 {
2975 	if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2976 		return 0;
2977 
2978 	switch (c->event) {
2979 	case XFRM_MSG_POLEXPIRE:
2980 		return key_notify_policy_expire(xp, c);
2981 	case XFRM_MSG_DELPOLICY:
2982 	case XFRM_MSG_NEWPOLICY:
2983 	case XFRM_MSG_UPDPOLICY:
2984 		return key_notify_policy(xp, dir, c);
2985 	case XFRM_MSG_FLUSHPOLICY:
2986 		if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2987 			break;
2988 		return key_notify_policy_flush(c);
2989 	default:
2990 		printk("pfkey: Unknown policy event %d\n", c->event);
2991 		break;
2992 	}
2993 
2994 	return 0;
2995 }
2996 
2997 static u32 get_acqseq(void)
2998 {
2999 	u32 res;
3000 	static u32 acqseq;
3001 	static DEFINE_SPINLOCK(acqseq_lock);
3002 
3003 	spin_lock_bh(&acqseq_lock);
3004 	res = (++acqseq ? : ++acqseq);
3005 	spin_unlock_bh(&acqseq_lock);
3006 	return res;
3007 }
3008 
3009 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3010 {
3011 	struct sk_buff *skb;
3012 	struct sadb_msg *hdr;
3013 	struct sadb_address *addr;
3014 	struct sadb_x_policy *pol;
3015 	struct sockaddr_in *sin;
3016 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3017 	struct sockaddr_in6 *sin6;
3018 #endif
3019 	int sockaddr_size;
3020 	int size;
3021 	struct sadb_x_sec_ctx *sec_ctx;
3022 	struct xfrm_sec_ctx *xfrm_ctx;
3023 	int ctx_size = 0;
3024 
3025 	sockaddr_size = pfkey_sockaddr_size(x->props.family);
3026 	if (!sockaddr_size)
3027 		return -EINVAL;
3028 
3029 	size = sizeof(struct sadb_msg) +
3030 		(sizeof(struct sadb_address) * 2) +
3031 		(sockaddr_size * 2) +
3032 		sizeof(struct sadb_x_policy);
3033 
3034 	if (x->id.proto == IPPROTO_AH)
3035 		size += count_ah_combs(t);
3036 	else if (x->id.proto == IPPROTO_ESP)
3037 		size += count_esp_combs(t);
3038 
3039 	if ((xfrm_ctx = x->security)) {
3040 		ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3041 		size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
3042 	}
3043 
3044 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
3045 	if (skb == NULL)
3046 		return -ENOMEM;
3047 
3048 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3049 	hdr->sadb_msg_version = PF_KEY_V2;
3050 	hdr->sadb_msg_type = SADB_ACQUIRE;
3051 	hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3052 	hdr->sadb_msg_len = size / sizeof(uint64_t);
3053 	hdr->sadb_msg_errno = 0;
3054 	hdr->sadb_msg_reserved = 0;
3055 	hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3056 	hdr->sadb_msg_pid = 0;
3057 
3058 	/* src address */
3059 	addr = (struct sadb_address*) skb_put(skb,
3060 					      sizeof(struct sadb_address)+sockaddr_size);
3061 	addr->sadb_address_len =
3062 		(sizeof(struct sadb_address)+sockaddr_size)/
3063 			sizeof(uint64_t);
3064 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3065 	addr->sadb_address_proto = 0;
3066 	addr->sadb_address_reserved = 0;
3067 	if (x->props.family == AF_INET) {
3068 		addr->sadb_address_prefixlen = 32;
3069 
3070 		sin = (struct sockaddr_in *) (addr + 1);
3071 		sin->sin_family = AF_INET;
3072 		sin->sin_addr.s_addr = x->props.saddr.a4;
3073 		sin->sin_port = 0;
3074 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3075 	}
3076 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3077 	else if (x->props.family == AF_INET6) {
3078 		addr->sadb_address_prefixlen = 128;
3079 
3080 		sin6 = (struct sockaddr_in6 *) (addr + 1);
3081 		sin6->sin6_family = AF_INET6;
3082 		sin6->sin6_port = 0;
3083 		sin6->sin6_flowinfo = 0;
3084 		memcpy(&sin6->sin6_addr,
3085 		       x->props.saddr.a6, sizeof(struct in6_addr));
3086 		sin6->sin6_scope_id = 0;
3087 	}
3088 #endif
3089 	else
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 	if (x->props.family == AF_INET) {
3102 		addr->sadb_address_prefixlen = 32;
3103 
3104 		sin = (struct sockaddr_in *) (addr + 1);
3105 		sin->sin_family = AF_INET;
3106 		sin->sin_addr.s_addr = x->id.daddr.a4;
3107 		sin->sin_port = 0;
3108 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3109 	}
3110 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3111 	else if (x->props.family == AF_INET6) {
3112 		addr->sadb_address_prefixlen = 128;
3113 
3114 		sin6 = (struct sockaddr_in6 *) (addr + 1);
3115 		sin6->sin6_family = AF_INET6;
3116 		sin6->sin6_port = 0;
3117 		sin6->sin6_flowinfo = 0;
3118 		memcpy(&sin6->sin6_addr,
3119 		       x->id.daddr.a6, sizeof(struct in6_addr));
3120 		sin6->sin6_scope_id = 0;
3121 	}
3122 #endif
3123 	else
3124 		BUG();
3125 
3126 	pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
3127 	pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3128 	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3129 	pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3130 	pol->sadb_x_policy_dir = dir+1;
3131 	pol->sadb_x_policy_id = xp->index;
3132 
3133 	/* Set sadb_comb's. */
3134 	if (x->id.proto == IPPROTO_AH)
3135 		dump_ah_combs(skb, t);
3136 	else if (x->id.proto == IPPROTO_ESP)
3137 		dump_esp_combs(skb, t);
3138 
3139 	/* security context */
3140 	if (xfrm_ctx) {
3141 		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3142 				sizeof(struct sadb_x_sec_ctx) + ctx_size);
3143 		sec_ctx->sadb_x_sec_len =
3144 		  (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3145 		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3146 		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3147 		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3148 		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3149 		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3150 		       xfrm_ctx->ctx_len);
3151 	}
3152 
3153 	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3154 }
3155 
3156 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3157 						u8 *data, int len, int *dir)
3158 {
3159 	struct xfrm_policy *xp;
3160 	struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3161 	struct sadb_x_sec_ctx *sec_ctx;
3162 
3163 	switch (sk->sk_family) {
3164 	case AF_INET:
3165 		if (opt != IP_IPSEC_POLICY) {
3166 			*dir = -EOPNOTSUPP;
3167 			return NULL;
3168 		}
3169 		break;
3170 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3171 	case AF_INET6:
3172 		if (opt != IPV6_IPSEC_POLICY) {
3173 			*dir = -EOPNOTSUPP;
3174 			return NULL;
3175 		}
3176 		break;
3177 #endif
3178 	default:
3179 		*dir = -EINVAL;
3180 		return NULL;
3181 	}
3182 
3183 	*dir = -EINVAL;
3184 
3185 	if (len < sizeof(struct sadb_x_policy) ||
3186 	    pol->sadb_x_policy_len*8 > len ||
3187 	    pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3188 	    (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3189 		return NULL;
3190 
3191 	xp = xfrm_policy_alloc(GFP_ATOMIC);
3192 	if (xp == NULL) {
3193 		*dir = -ENOBUFS;
3194 		return NULL;
3195 	}
3196 
3197 	xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3198 		      XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3199 
3200 	xp->lft.soft_byte_limit = XFRM_INF;
3201 	xp->lft.hard_byte_limit = XFRM_INF;
3202 	xp->lft.soft_packet_limit = XFRM_INF;
3203 	xp->lft.hard_packet_limit = XFRM_INF;
3204 	xp->family = sk->sk_family;
3205 
3206 	xp->xfrm_nr = 0;
3207 	if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3208 	    (*dir = parse_ipsecrequests(xp, pol)) < 0)
3209 		goto out;
3210 
3211 	/* security context too */
3212 	if (len >= (pol->sadb_x_policy_len*8 +
3213 	    sizeof(struct sadb_x_sec_ctx))) {
3214 		char *p = (char *)pol;
3215 		struct xfrm_user_sec_ctx *uctx;
3216 
3217 		p += pol->sadb_x_policy_len*8;
3218 		sec_ctx = (struct sadb_x_sec_ctx *)p;
3219 		if (len < pol->sadb_x_policy_len*8 +
3220 		    sec_ctx->sadb_x_sec_len) {
3221 			*dir = -EINVAL;
3222 			goto out;
3223 		}
3224 		if ((*dir = verify_sec_ctx_len(p)))
3225 			goto out;
3226 		uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3227 		*dir = security_xfrm_policy_alloc(xp, uctx);
3228 		kfree(uctx);
3229 
3230 		if (*dir)
3231 			goto out;
3232 	}
3233 
3234 	*dir = pol->sadb_x_policy_dir-1;
3235 	return xp;
3236 
3237 out:
3238 	xfrm_policy_destroy(xp);
3239 	return NULL;
3240 }
3241 
3242 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3243 {
3244 	struct sk_buff *skb;
3245 	struct sadb_msg *hdr;
3246 	struct sadb_sa *sa;
3247 	struct sadb_address *addr;
3248 	struct sadb_x_nat_t_port *n_port;
3249 	struct sockaddr_in *sin;
3250 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3251 	struct sockaddr_in6 *sin6;
3252 #endif
3253 	int sockaddr_size;
3254 	int size;
3255 	__u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3256 	struct xfrm_encap_tmpl *natt = NULL;
3257 
3258 	sockaddr_size = pfkey_sockaddr_size(x->props.family);
3259 	if (!sockaddr_size)
3260 		return -EINVAL;
3261 
3262 	if (!satype)
3263 		return -EINVAL;
3264 
3265 	if (!x->encap)
3266 		return -EINVAL;
3267 
3268 	natt = x->encap;
3269 
3270 	/* Build an SADB_X_NAT_T_NEW_MAPPING message:
3271 	 *
3272 	 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3273 	 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3274 	 */
3275 
3276 	size = sizeof(struct sadb_msg) +
3277 		sizeof(struct sadb_sa) +
3278 		(sizeof(struct sadb_address) * 2) +
3279 		(sockaddr_size * 2) +
3280 		(sizeof(struct sadb_x_nat_t_port) * 2);
3281 
3282 	skb =  alloc_skb(size + 16, GFP_ATOMIC);
3283 	if (skb == NULL)
3284 		return -ENOMEM;
3285 
3286 	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3287 	hdr->sadb_msg_version = PF_KEY_V2;
3288 	hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3289 	hdr->sadb_msg_satype = satype;
3290 	hdr->sadb_msg_len = size / sizeof(uint64_t);
3291 	hdr->sadb_msg_errno = 0;
3292 	hdr->sadb_msg_reserved = 0;
3293 	hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3294 	hdr->sadb_msg_pid = 0;
3295 
3296 	/* SA */
3297 	sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3298 	sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3299 	sa->sadb_sa_exttype = SADB_EXT_SA;
3300 	sa->sadb_sa_spi = x->id.spi;
3301 	sa->sadb_sa_replay = 0;
3302 	sa->sadb_sa_state = 0;
3303 	sa->sadb_sa_auth = 0;
3304 	sa->sadb_sa_encrypt = 0;
3305 	sa->sadb_sa_flags = 0;
3306 
3307 	/* ADDRESS_SRC (old addr) */
3308 	addr = (struct sadb_address*)
3309 		skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3310 	addr->sadb_address_len =
3311 		(sizeof(struct sadb_address)+sockaddr_size)/
3312 			sizeof(uint64_t);
3313 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3314 	addr->sadb_address_proto = 0;
3315 	addr->sadb_address_reserved = 0;
3316 	if (x->props.family == AF_INET) {
3317 		addr->sadb_address_prefixlen = 32;
3318 
3319 		sin = (struct sockaddr_in *) (addr + 1);
3320 		sin->sin_family = AF_INET;
3321 		sin->sin_addr.s_addr = x->props.saddr.a4;
3322 		sin->sin_port = 0;
3323 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3324 	}
3325 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3326 	else if (x->props.family == AF_INET6) {
3327 		addr->sadb_address_prefixlen = 128;
3328 
3329 		sin6 = (struct sockaddr_in6 *) (addr + 1);
3330 		sin6->sin6_family = AF_INET6;
3331 		sin6->sin6_port = 0;
3332 		sin6->sin6_flowinfo = 0;
3333 		memcpy(&sin6->sin6_addr,
3334 		       x->props.saddr.a6, sizeof(struct in6_addr));
3335 		sin6->sin6_scope_id = 0;
3336 	}
3337 #endif
3338 	else
3339 		BUG();
3340 
3341 	/* NAT_T_SPORT (old port) */
3342 	n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3343 	n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3344 	n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3345 	n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3346 	n_port->sadb_x_nat_t_port_reserved = 0;
3347 
3348 	/* ADDRESS_DST (new addr) */
3349 	addr = (struct sadb_address*)
3350 		skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3351 	addr->sadb_address_len =
3352 		(sizeof(struct sadb_address)+sockaddr_size)/
3353 			sizeof(uint64_t);
3354 	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3355 	addr->sadb_address_proto = 0;
3356 	addr->sadb_address_reserved = 0;
3357 	if (x->props.family == AF_INET) {
3358 		addr->sadb_address_prefixlen = 32;
3359 
3360 		sin = (struct sockaddr_in *) (addr + 1);
3361 		sin->sin_family = AF_INET;
3362 		sin->sin_addr.s_addr = ipaddr->a4;
3363 		sin->sin_port = 0;
3364 		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3365 	}
3366 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3367 	else if (x->props.family == AF_INET6) {
3368 		addr->sadb_address_prefixlen = 128;
3369 
3370 		sin6 = (struct sockaddr_in6 *) (addr + 1);
3371 		sin6->sin6_family = AF_INET6;
3372 		sin6->sin6_port = 0;
3373 		sin6->sin6_flowinfo = 0;
3374 		memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3375 		sin6->sin6_scope_id = 0;
3376 	}
3377 #endif
3378 	else
3379 		BUG();
3380 
3381 	/* NAT_T_DPORT (new port) */
3382 	n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3383 	n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3384 	n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3385 	n_port->sadb_x_nat_t_port_port = sport;
3386 	n_port->sadb_x_nat_t_port_reserved = 0;
3387 
3388 	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3389 }
3390 
3391 #ifdef CONFIG_NET_KEY_MIGRATE
3392 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3393 			    struct xfrm_selector *sel)
3394 {
3395 	struct sadb_address *addr;
3396 	struct sockaddr_in *sin;
3397 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3398 	struct sockaddr_in6 *sin6;
3399 #endif
3400 	addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3401 	addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3402 	addr->sadb_address_exttype = type;
3403 	addr->sadb_address_proto = sel->proto;
3404 	addr->sadb_address_reserved = 0;
3405 
3406 	switch (type) {
3407 	case SADB_EXT_ADDRESS_SRC:
3408 		if (sel->family == AF_INET) {
3409 			addr->sadb_address_prefixlen = sel->prefixlen_s;
3410 			sin = (struct sockaddr_in *)(addr + 1);
3411 			sin->sin_family = AF_INET;
3412 			memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3413 			       sizeof(sin->sin_addr.s_addr));
3414 			sin->sin_port = 0;
3415 			memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3416 		}
3417 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3418 		else if (sel->family == AF_INET6) {
3419 			addr->sadb_address_prefixlen = sel->prefixlen_s;
3420 			sin6 = (struct sockaddr_in6 *)(addr + 1);
3421 			sin6->sin6_family = AF_INET6;
3422 			sin6->sin6_port = 0;
3423 			sin6->sin6_flowinfo = 0;
3424 			sin6->sin6_scope_id = 0;
3425 			memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3426 			       sizeof(sin6->sin6_addr.s6_addr));
3427 		}
3428 #endif
3429 		break;
3430 	case SADB_EXT_ADDRESS_DST:
3431 		if (sel->family == AF_INET) {
3432 			addr->sadb_address_prefixlen = sel->prefixlen_d;
3433 			sin = (struct sockaddr_in *)(addr + 1);
3434 			sin->sin_family = AF_INET;
3435 			memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3436 			       sizeof(sin->sin_addr.s_addr));
3437 			sin->sin_port = 0;
3438 			memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3439 		}
3440 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3441 		else if (sel->family == AF_INET6) {
3442 			addr->sadb_address_prefixlen = sel->prefixlen_d;
3443 			sin6 = (struct sockaddr_in6 *)(addr + 1);
3444 			sin6->sin6_family = AF_INET6;
3445 			sin6->sin6_port = 0;
3446 			sin6->sin6_flowinfo = 0;
3447 			sin6->sin6_scope_id = 0;
3448 			memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3449 			       sizeof(sin6->sin6_addr.s6_addr));
3450 		}
3451 #endif
3452 		break;
3453 	default:
3454 		return -EINVAL;
3455 	}
3456 
3457 	return 0;
3458 }
3459 
3460 static int set_ipsecrequest(struct sk_buff *skb,
3461 			    uint8_t proto, uint8_t mode, int level,
3462 			    uint32_t reqid, uint8_t family,
3463 			    xfrm_address_t *src, xfrm_address_t *dst)
3464 {
3465 	struct sadb_x_ipsecrequest *rq;
3466 	struct sockaddr_in *sin;
3467 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3468 	struct sockaddr_in6 *sin6;
3469 #endif
3470 	int size_req;
3471 
3472 	size_req = sizeof(struct sadb_x_ipsecrequest) +
3473 		   pfkey_sockaddr_pair_size(family);
3474 
3475 	rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3476 	memset(rq, 0, size_req);
3477 	rq->sadb_x_ipsecrequest_len = size_req;
3478 	rq->sadb_x_ipsecrequest_proto = proto;
3479 	rq->sadb_x_ipsecrequest_mode = mode;
3480 	rq->sadb_x_ipsecrequest_level = level;
3481 	rq->sadb_x_ipsecrequest_reqid = reqid;
3482 
3483 	switch (family) {
3484 	case AF_INET:
3485 		sin = (struct sockaddr_in *)(rq + 1);
3486 		sin->sin_family = AF_INET;
3487 		memcpy(&sin->sin_addr.s_addr, src,
3488 		       sizeof(sin->sin_addr.s_addr));
3489 		sin++;
3490 		sin->sin_family = AF_INET;
3491 		memcpy(&sin->sin_addr.s_addr, dst,
3492 		       sizeof(sin->sin_addr.s_addr));
3493 		break;
3494 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3495 	case AF_INET6:
3496 		sin6 = (struct sockaddr_in6 *)(rq + 1);
3497 		sin6->sin6_family = AF_INET6;
3498 		sin6->sin6_port = 0;
3499 		sin6->sin6_flowinfo = 0;
3500 		sin6->sin6_scope_id = 0;
3501 		memcpy(&sin6->sin6_addr.s6_addr, src,
3502 		       sizeof(sin6->sin6_addr.s6_addr));
3503 		sin6++;
3504 		sin6->sin6_family = AF_INET6;
3505 		sin6->sin6_port = 0;
3506 		sin6->sin6_flowinfo = 0;
3507 		sin6->sin6_scope_id = 0;
3508 		memcpy(&sin6->sin6_addr.s6_addr, dst,
3509 		       sizeof(sin6->sin6_addr.s6_addr));
3510 		break;
3511 #endif
3512 	default:
3513 		return -EINVAL;
3514 	}
3515 
3516 	return 0;
3517 }
3518 #endif
3519 
3520 #ifdef CONFIG_NET_KEY_MIGRATE
3521 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3522 			      struct xfrm_migrate *m, int num_bundles)
3523 {
3524 	int i;
3525 	int sasize_sel;
3526 	int size = 0;
3527 	int size_pol = 0;
3528 	struct sk_buff *skb;
3529 	struct sadb_msg *hdr;
3530 	struct sadb_x_policy *pol;
3531 	struct xfrm_migrate *mp;
3532 
3533 	if (type != XFRM_POLICY_TYPE_MAIN)
3534 		return 0;
3535 
3536 	if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3537 		return -EINVAL;
3538 
3539 	/* selector */
3540 	sasize_sel = pfkey_sockaddr_size(sel->family);
3541 	if (!sasize_sel)
3542 		return -EINVAL;
3543 	size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3544 
3545 	/* policy info */
3546 	size_pol += sizeof(struct sadb_x_policy);
3547 
3548 	/* ipsecrequests */
3549 	for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3550 		/* old locator pair */
3551 		size_pol += sizeof(struct sadb_x_ipsecrequest) +
3552 			    pfkey_sockaddr_pair_size(mp->old_family);
3553 		/* new locator pair */
3554 		size_pol += sizeof(struct sadb_x_ipsecrequest) +
3555 			    pfkey_sockaddr_pair_size(mp->new_family);
3556 	}
3557 
3558 	size += sizeof(struct sadb_msg) + size_pol;
3559 
3560 	/* alloc buffer */
3561 	skb = alloc_skb(size, GFP_ATOMIC);
3562 	if (skb == NULL)
3563 		return -ENOMEM;
3564 
3565 	hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3566 	hdr->sadb_msg_version = PF_KEY_V2;
3567 	hdr->sadb_msg_type = SADB_X_MIGRATE;
3568 	hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3569 	hdr->sadb_msg_len = size / 8;
3570 	hdr->sadb_msg_errno = 0;
3571 	hdr->sadb_msg_reserved = 0;
3572 	hdr->sadb_msg_seq = 0;
3573 	hdr->sadb_msg_pid = 0;
3574 
3575 	/* selector src */
3576 	set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3577 
3578 	/* selector dst */
3579 	set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3580 
3581 	/* policy information */
3582 	pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3583 	pol->sadb_x_policy_len = size_pol / 8;
3584 	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3585 	pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3586 	pol->sadb_x_policy_dir = dir + 1;
3587 	pol->sadb_x_policy_id = 0;
3588 	pol->sadb_x_policy_priority = 0;
3589 
3590 	for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3591 		/* old ipsecrequest */
3592 		int mode = pfkey_mode_from_xfrm(mp->mode);
3593 		if (mode < 0)
3594 			goto err;
3595 		if (set_ipsecrequest(skb, mp->proto, mode,
3596 				     (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3597 				     mp->reqid, mp->old_family,
3598 				     &mp->old_saddr, &mp->old_daddr) < 0)
3599 			goto err;
3600 
3601 		/* new ipsecrequest */
3602 		if (set_ipsecrequest(skb, mp->proto, mode,
3603 				     (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3604 				     mp->reqid, mp->new_family,
3605 				     &mp->new_saddr, &mp->new_daddr) < 0)
3606 			goto err;
3607 	}
3608 
3609 	/* broadcast migrate message to sockets */
3610 	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3611 
3612 	return 0;
3613 
3614 err:
3615 	kfree_skb(skb);
3616 	return -EINVAL;
3617 }
3618 #else
3619 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3620 			      struct xfrm_migrate *m, int num_bundles)
3621 {
3622 	return -ENOPROTOOPT;
3623 }
3624 #endif
3625 
3626 static int pfkey_sendmsg(struct kiocb *kiocb,
3627 			 struct socket *sock, struct msghdr *msg, size_t len)
3628 {
3629 	struct sock *sk = sock->sk;
3630 	struct sk_buff *skb = NULL;
3631 	struct sadb_msg *hdr = NULL;
3632 	int err;
3633 
3634 	err = -EOPNOTSUPP;
3635 	if (msg->msg_flags & MSG_OOB)
3636 		goto out;
3637 
3638 	err = -EMSGSIZE;
3639 	if ((unsigned)len > sk->sk_sndbuf - 32)
3640 		goto out;
3641 
3642 	err = -ENOBUFS;
3643 	skb = alloc_skb(len, GFP_KERNEL);
3644 	if (skb == NULL)
3645 		goto out;
3646 
3647 	err = -EFAULT;
3648 	if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3649 		goto out;
3650 
3651 	hdr = pfkey_get_base_msg(skb, &err);
3652 	if (!hdr)
3653 		goto out;
3654 
3655 	mutex_lock(&xfrm_cfg_mutex);
3656 	err = pfkey_process(sk, skb, hdr);
3657 	mutex_unlock(&xfrm_cfg_mutex);
3658 
3659 out:
3660 	if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3661 		err = 0;
3662 	if (skb)
3663 		kfree_skb(skb);
3664 
3665 	return err ? : len;
3666 }
3667 
3668 static int pfkey_recvmsg(struct kiocb *kiocb,
3669 			 struct socket *sock, struct msghdr *msg, size_t len,
3670 			 int flags)
3671 {
3672 	struct sock *sk = sock->sk;
3673 	struct sk_buff *skb;
3674 	int copied, err;
3675 
3676 	err = -EINVAL;
3677 	if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3678 		goto out;
3679 
3680 	msg->msg_namelen = 0;
3681 	skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3682 	if (skb == NULL)
3683 		goto out;
3684 
3685 	copied = skb->len;
3686 	if (copied > len) {
3687 		msg->msg_flags |= MSG_TRUNC;
3688 		copied = len;
3689 	}
3690 
3691 	skb_reset_transport_header(skb);
3692 	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3693 	if (err)
3694 		goto out_free;
3695 
3696 	sock_recv_timestamp(msg, sk, skb);
3697 
3698 	err = (flags & MSG_TRUNC) ? skb->len : copied;
3699 
3700 out_free:
3701 	skb_free_datagram(sk, skb);
3702 out:
3703 	return err;
3704 }
3705 
3706 static const struct proto_ops pfkey_ops = {
3707 	.family		=	PF_KEY,
3708 	.owner		=	THIS_MODULE,
3709 	/* Operations that make no sense on pfkey sockets. */
3710 	.bind		=	sock_no_bind,
3711 	.connect	=	sock_no_connect,
3712 	.socketpair	=	sock_no_socketpair,
3713 	.accept		=	sock_no_accept,
3714 	.getname	=	sock_no_getname,
3715 	.ioctl		=	sock_no_ioctl,
3716 	.listen		=	sock_no_listen,
3717 	.shutdown	=	sock_no_shutdown,
3718 	.setsockopt	=	sock_no_setsockopt,
3719 	.getsockopt	=	sock_no_getsockopt,
3720 	.mmap		=	sock_no_mmap,
3721 	.sendpage	=	sock_no_sendpage,
3722 
3723 	/* Now the operations that really occur. */
3724 	.release	=	pfkey_release,
3725 	.poll		=	datagram_poll,
3726 	.sendmsg	=	pfkey_sendmsg,
3727 	.recvmsg	=	pfkey_recvmsg,
3728 };
3729 
3730 static struct net_proto_family pfkey_family_ops = {
3731 	.family	=	PF_KEY,
3732 	.create	=	pfkey_create,
3733 	.owner	=	THIS_MODULE,
3734 };
3735 
3736 #ifdef CONFIG_PROC_FS
3737 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3738 			   int length, int *eof, void *data)
3739 {
3740 	off_t pos = 0;
3741 	off_t begin = 0;
3742 	int len = 0;
3743 	struct sock *s;
3744 	struct hlist_node *node;
3745 
3746 	len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
3747 
3748 	read_lock(&pfkey_table_lock);
3749 
3750 	sk_for_each(s, node, &pfkey_table) {
3751 		len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3752 			       s,
3753 			       atomic_read(&s->sk_refcnt),
3754 			       atomic_read(&s->sk_rmem_alloc),
3755 			       atomic_read(&s->sk_wmem_alloc),
3756 			       sock_i_uid(s),
3757 			       sock_i_ino(s)
3758 			       );
3759 
3760 		buffer[len++] = '\n';
3761 
3762 		pos = begin + len;
3763 		if (pos < offset) {
3764 			len = 0;
3765 			begin = pos;
3766 		}
3767 		if(pos > offset + length)
3768 			goto done;
3769 	}
3770 	*eof = 1;
3771 
3772 done:
3773 	read_unlock(&pfkey_table_lock);
3774 
3775 	*start = buffer + (offset - begin);
3776 	len -= (offset - begin);
3777 
3778 	if (len > length)
3779 		len = length;
3780 	if (len < 0)
3781 		len = 0;
3782 
3783 	return len;
3784 }
3785 #endif
3786 
3787 static struct xfrm_mgr pfkeyv2_mgr =
3788 {
3789 	.id		= "pfkeyv2",
3790 	.notify		= pfkey_send_notify,
3791 	.acquire	= pfkey_send_acquire,
3792 	.compile_policy	= pfkey_compile_policy,
3793 	.new_mapping	= pfkey_send_new_mapping,
3794 	.notify_policy	= pfkey_send_policy_notify,
3795 	.migrate	= pfkey_send_migrate,
3796 };
3797 
3798 static void __exit ipsec_pfkey_exit(void)
3799 {
3800 	xfrm_unregister_km(&pfkeyv2_mgr);
3801 	remove_proc_entry("pfkey", init_net.proc_net);
3802 	sock_unregister(PF_KEY);
3803 	proto_unregister(&key_proto);
3804 }
3805 
3806 static int __init ipsec_pfkey_init(void)
3807 {
3808 	int err = proto_register(&key_proto, 0);
3809 
3810 	if (err != 0)
3811 		goto out;
3812 
3813 	err = sock_register(&pfkey_family_ops);
3814 	if (err != 0)
3815 		goto out_unregister_key_proto;
3816 #ifdef CONFIG_PROC_FS
3817 	err = -ENOMEM;
3818 	if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
3819 		goto out_sock_unregister;
3820 #endif
3821 	err = xfrm_register_km(&pfkeyv2_mgr);
3822 	if (err != 0)
3823 		goto out_remove_proc_entry;
3824 out:
3825 	return err;
3826 out_remove_proc_entry:
3827 #ifdef CONFIG_PROC_FS
3828 	remove_proc_entry("net/pfkey", NULL);
3829 out_sock_unregister:
3830 #endif
3831 	sock_unregister(PF_KEY);
3832 out_unregister_key_proto:
3833 	proto_unregister(&key_proto);
3834 	goto out;
3835 }
3836 
3837 module_init(ipsec_pfkey_init);
3838 module_exit(ipsec_pfkey_exit);
3839 MODULE_LICENSE("GPL");
3840 MODULE_ALIAS_NETPROTO(PF_KEY);
3841