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[IPSEC]: Add xfrm_state_afinfo->init_flags
[deliverable/linux.git] / net / key / af_key.c
CommitLineData
1da177e4
LT		 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/config.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/xfrm.h>
30
31#include <net/sock.h>
32
33#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
34#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
35
36
37/* List of all pfkey sockets. */
38static HLIST_HEAD(pfkey_table);
39static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
40static DEFINE_RWLOCK(pfkey_table_lock);
41static atomic_t pfkey_table_users = ATOMIC_INIT(0);
42
43static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
44
45struct pfkey_sock {
46 /* struct sock must be the first member of struct pfkey_sock */
47 struct sock sk;
48 int registered;
49 int promisc;
50};
51
52static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
53{
54 return (struct pfkey_sock *)sk;
55}
56
57static void pfkey_sock_destruct(struct sock *sk)
58{
59 skb_queue_purge(&sk->sk_receive_queue);
60
61 if (!sock_flag(sk, SOCK_DEAD)) {
62 printk("Attempt to release alive pfkey socket: %p\n", sk);
63 return;
64 }
65
66 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
67 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
68
69 atomic_dec(&pfkey_socks_nr);
70}
71
72static void pfkey_table_grab(void)
73{
74 write_lock_bh(&pfkey_table_lock);
75
76 if (atomic_read(&pfkey_table_users)) {
77 DECLARE_WAITQUEUE(wait, current);
78
79 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
80 for(;;) {
81 set_current_state(TASK_UNINTERRUPTIBLE);
82 if (atomic_read(&pfkey_table_users) == 0)
83 break;
84 write_unlock_bh(&pfkey_table_lock);
85 schedule();
86 write_lock_bh(&pfkey_table_lock);
87 }
88
89 __set_current_state(TASK_RUNNING);
90 remove_wait_queue(&pfkey_table_wait, &wait);
91 }
92}
93
94static __inline__ void pfkey_table_ungrab(void)
95{
96 write_unlock_bh(&pfkey_table_lock);
97 wake_up(&pfkey_table_wait);
98}
99
100static __inline__ void pfkey_lock_table(void)
101{
102 /* read_lock() synchronizes us to pfkey_table_grab */
103
104 read_lock(&pfkey_table_lock);
105 atomic_inc(&pfkey_table_users);
106 read_unlock(&pfkey_table_lock);
107}
108
109static __inline__ void pfkey_unlock_table(void)
110{
111 if (atomic_dec_and_test(&pfkey_table_users))
112 wake_up(&pfkey_table_wait);
113}
114
115
116static struct proto_ops pfkey_ops;
117
118static void pfkey_insert(struct sock *sk)
119{
120 pfkey_table_grab();
121 sk_add_node(sk, &pfkey_table);
122 pfkey_table_ungrab();
123}
124
125static void pfkey_remove(struct sock *sk)
126{
127 pfkey_table_grab();
128 sk_del_node_init(sk);
129 pfkey_table_ungrab();
130}
131
132static struct proto key_proto = {
133 .name = "KEY",
134 .owner = THIS_MODULE,
135 .obj_size = sizeof(struct pfkey_sock),
136};
137
138static int pfkey_create(struct socket *sock, int protocol)
139{
140 struct sock *sk;
141 int err;
142
143 if (!capable(CAP_NET_ADMIN))
144 return -EPERM;
145 if (sock->type != SOCK_RAW)
146 return -ESOCKTNOSUPPORT;
147 if (protocol != PF_KEY_V2)
148 return -EPROTONOSUPPORT;
149
150 err = -ENOMEM;
151 sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
152 if (sk == NULL)
153 goto out;
154
155 sock->ops = &pfkey_ops;
156 sock_init_data(sock, sk);
157
158 sk->sk_family = PF_KEY;
159 sk->sk_destruct = pfkey_sock_destruct;
160
161 atomic_inc(&pfkey_socks_nr);
162
163 pfkey_insert(sk);
164
165 return 0;
166out:
167 return err;
168}
169
170static int pfkey_release(struct socket *sock)
171{
172 struct sock *sk = sock->sk;
173
174 if (!sk)
175 return 0;
176
177 pfkey_remove(sk);
178
179 sock_orphan(sk);
180 sock->sk = NULL;
181 skb_queue_purge(&sk->sk_write_queue);
182 sock_put(sk);
183
184 return 0;
185}
186
187static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
188 int allocation, struct sock *sk)
189{
190 int err = -ENOBUFS;
191
192 sock_hold(sk);
193 if (*skb2 == NULL) {
194 if (atomic_read(&skb->users) != 1) {
195 *skb2 = skb_clone(skb, allocation);
196 } else {
197 *skb2 = skb;
198 atomic_inc(&skb->users);
199 }
200 }
201 if (*skb2 != NULL) {
202 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
203 skb_orphan(*skb2);
204 skb_set_owner_r(*skb2, sk);
205 skb_queue_tail(&sk->sk_receive_queue, *skb2);
206 sk->sk_data_ready(sk, (*skb2)->len);
207 *skb2 = NULL;
208 err = 0;
209 }
210 }
211 sock_put(sk);
212 return err;
213}
214
215/* Send SKB to all pfkey sockets matching selected criteria. */
216#define BROADCAST_ALL 0
217#define BROADCAST_ONE 1
218#define BROADCAST_REGISTERED 2
219#define BROADCAST_PROMISC_ONLY 4
220static int pfkey_broadcast(struct sk_buff *skb, int allocation,
221 int broadcast_flags, struct sock *one_sk)
222{
223 struct sock *sk;
224 struct hlist_node *node;
225 struct sk_buff *skb2 = NULL;
226 int err = -ESRCH;
227
228 /* XXX Do we need something like netlink_overrun? I think
229 * XXX PF_KEY socket apps will not mind current behavior.
230 */
231 if (!skb)
232 return -ENOMEM;
233
234 pfkey_lock_table();
235 sk_for_each(sk, node, &pfkey_table) {
236 struct pfkey_sock *pfk = pfkey_sk(sk);
237 int err2;
238
239 /* Yes, it means that if you are meant to receive this
240 * pfkey message you receive it twice as promiscuous
241 * socket.
242 */
243 if (pfk->promisc)
244 pfkey_broadcast_one(skb, &skb2, allocation, sk);
245
246 /* the exact target will be processed later */
247 if (sk == one_sk)
248 continue;
249 if (broadcast_flags != BROADCAST_ALL) {
250 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
251 continue;
252 if ((broadcast_flags & BROADCAST_REGISTERED) &&
253 !pfk->registered)
254 continue;
255 if (broadcast_flags & BROADCAST_ONE)
256 continue;
257 }
258
259 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
260
261 /* Error is cleare after succecful sending to at least one
262 * registered KM */
263 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
264 err = err2;
265 }
266 pfkey_unlock_table();
267
268 if (one_sk != NULL)
269 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
270
271 if (skb2)
272 kfree_skb(skb2);
273 kfree_skb(skb);
274 return err;
275}
276
277static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
278{
279 *new = *orig;
280}
281
282static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
283{
284 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
285 struct sadb_msg *hdr;
286
287 if (!skb)
288 return -ENOBUFS;
289
290 /* Woe be to the platform trying to support PFKEY yet
291 * having normal errnos outside the 1-255 range, inclusive.
292 */
293 err = -err;
294 if (err == ERESTARTSYS ||
295 err == ERESTARTNOHAND ||
296 err == ERESTARTNOINTR)
297 err = EINTR;
298 if (err >= 512)
299 err = EINVAL;
300 if (err <= 0 || err >= 256)
301 BUG();
302
303 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
304 pfkey_hdr_dup(hdr, orig);
305 hdr->sadb_msg_errno = (uint8_t) err;
306 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
307 sizeof(uint64_t));
308
309 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
310
311 return 0;
312}
313
314static u8 sadb_ext_min_len[] = {
315 [SADB_EXT_RESERVED] = (u8) 0,
316 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
317 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
318 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
319 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
320 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
321 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
322 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
323 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
324 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
325 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
326 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
327 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
328 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
329 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
330 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
331 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
332 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
333 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
334 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
335 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
336 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
337 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
338 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
339};
340
341/* Verify sadb_address_{len,prefixlen} against sa_family. */
342static int verify_address_len(void *p)
343{
344 struct sadb_address *sp = p;
345 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
346 struct sockaddr_in *sin;
347#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
348 struct sockaddr_in6 *sin6;
349#endif
350 int len;
351
352 switch (addr->sa_family) {
353 case AF_INET:
354 len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
355 len /= sizeof(uint64_t);
356 if (sp->sadb_address_len != len ||
357 sp->sadb_address_prefixlen > 32)
358 return -EINVAL;
359 break;
360#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
361 case AF_INET6:
362 len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
363 len /= sizeof(uint64_t);
364 if (sp->sadb_address_len != len ||
365 sp->sadb_address_prefixlen > 128)
366 return -EINVAL;
367 break;
368#endif
369 default:
370 /* It is user using kernel to keep track of security
371 * associations for another protocol, such as
372 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
373 * lengths.
374 *
375 * XXX Actually, association/policy database is not yet
376 * XXX able to cope with arbitrary sockaddr families.
377 * XXX When it can, remove this -EINVAL. -DaveM
378 */
379 return -EINVAL;
380 break;
381 };
382
383 return 0;
384}
385
386static int present_and_same_family(struct sadb_address *src,
387 struct sadb_address *dst)
388{
389 struct sockaddr *s_addr, *d_addr;
390
391 if (!src || !dst)
392 return 0;
393
394 s_addr = (struct sockaddr *)(src + 1);
395 d_addr = (struct sockaddr *)(dst + 1);
396 if (s_addr->sa_family != d_addr->sa_family)
397 return 0;
398 if (s_addr->sa_family != AF_INET
399#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
400 && s_addr->sa_family != AF_INET6
401#endif
402 )
403 return 0;
404
405 return 1;
406}
407
408static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
409{
410 char *p = (char *) hdr;
411 int len = skb->len;
412
413 len -= sizeof(*hdr);
414 p += sizeof(*hdr);
415 while (len > 0) {
416 struct sadb_ext *ehdr = (struct sadb_ext *) p;
417 uint16_t ext_type;
418 int ext_len;
419
420 ext_len = ehdr->sadb_ext_len;
421 ext_len *= sizeof(uint64_t);
422 ext_type = ehdr->sadb_ext_type;
423 if (ext_len < sizeof(uint64_t) ||
424 ext_len > len ||
425 ext_type == SADB_EXT_RESERVED)
426 return -EINVAL;
427
428 if (ext_type <= SADB_EXT_MAX) {
429 int min = (int) sadb_ext_min_len[ext_type];
430 if (ext_len < min)
431 return -EINVAL;
432 if (ext_hdrs[ext_type-1] != NULL)
433 return -EINVAL;
434 if (ext_type == SADB_EXT_ADDRESS_SRC ||
435 ext_type == SADB_EXT_ADDRESS_DST ||
436 ext_type == SADB_EXT_ADDRESS_PROXY ||
437 ext_type == SADB_X_EXT_NAT_T_OA) {
438 if (verify_address_len(p))
439 return -EINVAL;
440 }
441 ext_hdrs[ext_type-1] = p;
442 }
443 p += ext_len;
444 len -= ext_len;
445 }
446
447 return 0;
448}
449
450static uint16_t
451pfkey_satype2proto(uint8_t satype)
452{
453 switch (satype) {
454 case SADB_SATYPE_UNSPEC:
455 return IPSEC_PROTO_ANY;
456 case SADB_SATYPE_AH:
457 return IPPROTO_AH;
458 case SADB_SATYPE_ESP:
459 return IPPROTO_ESP;
460 case SADB_X_SATYPE_IPCOMP:
461 return IPPROTO_COMP;
462 break;
463 default:
464 return 0;
465 }
466 /* NOTREACHED */
467}
468
469static uint8_t
470pfkey_proto2satype(uint16_t proto)
471{
472 switch (proto) {
473 case IPPROTO_AH:
474 return SADB_SATYPE_AH;
475 case IPPROTO_ESP:
476 return SADB_SATYPE_ESP;
477 case IPPROTO_COMP:
478 return SADB_X_SATYPE_IPCOMP;
479 break;
480 default:
481 return 0;
482 }
483 /* NOTREACHED */
484}
485
486/* BTW, this scheme means that there is no way with PFKEY2 sockets to
487 * say specifically 'just raw sockets' as we encode them as 255.
488 */
489
490static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
491{
492 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
493}
494
495static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
496{
497 return (proto ? proto : IPSEC_PROTO_ANY);
498}
499
500static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
501 xfrm_address_t *xaddr)
502{
503 switch (((struct sockaddr*)(addr + 1))->sa_family) {
504 case AF_INET:
505 xaddr->a4 =
506 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
507 return AF_INET;
508#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
509 case AF_INET6:
510 memcpy(xaddr->a6,
511 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
512 sizeof(struct in6_addr));
513 return AF_INET6;
514#endif
515 default:
516 return 0;
517 }
518 /* NOTREACHED */
519}
520
521static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
522{
523 struct sadb_sa *sa;
524 struct sadb_address *addr;
525 uint16_t proto;
526 unsigned short family;
527 xfrm_address_t *xaddr;
528
529 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
530 if (sa == NULL)
531 return NULL;
532
533 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
534 if (proto == 0)
535 return NULL;
536
537 /* sadb_address_len should be checked by caller */
538 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
539 if (addr == NULL)
540 return NULL;
541
542 family = ((struct sockaddr *)(addr + 1))->sa_family;
543 switch (family) {
544 case AF_INET:
545 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
546 break;
547#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
548 case AF_INET6:
549 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
550 break;
551#endif
552 default:
553 xaddr = NULL;
554 }
555
556 if (!xaddr)
557 return NULL;
558
559 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
560}
561
562#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
563static int
564pfkey_sockaddr_size(sa_family_t family)
565{
566 switch (family) {
567 case AF_INET:
568 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
569#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
570 case AF_INET6:
571 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
572#endif
573 default:
574 return 0;
575 }
576 /* NOTREACHED */
577}
578
579static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
580{
581 struct sk_buff *skb;
582 struct sadb_msg *hdr;
583 struct sadb_sa *sa;
584 struct sadb_lifetime *lifetime;
585 struct sadb_address *addr;
586 struct sadb_key *key;
587 struct sadb_x_sa2 *sa2;
588 struct sockaddr_in *sin;
589#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
590 struct sockaddr_in6 *sin6;
591#endif
592 int size;
593 int auth_key_size = 0;
594 int encrypt_key_size = 0;
595 int sockaddr_size;
596 struct xfrm_encap_tmpl *natt = NULL;
597
598 /* address family check */
599 sockaddr_size = pfkey_sockaddr_size(x->props.family);
600 if (!sockaddr_size)
601 return ERR_PTR(-EINVAL);
602
603 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
604 key(AE), (identity(SD),) (sensitivity)> */
605 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
606 sizeof(struct sadb_lifetime) +
607 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
608 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
609 sizeof(struct sadb_address)*2 +
610 sockaddr_size*2 +
611 sizeof(struct sadb_x_sa2);
612 /* identity & sensitivity */
613
614 if ((x->props.family == AF_INET &&
615 x->sel.saddr.a4 != x->props.saddr.a4)
616#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
617 || (x->props.family == AF_INET6 &&
618 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
619#endif
620 )
621 size += sizeof(struct sadb_address) + sockaddr_size;
622
623 if (add_keys) {
624 if (x->aalg && x->aalg->alg_key_len) {
625 auth_key_size =
626 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
627 size += sizeof(struct sadb_key) + auth_key_size;
628 }
629 if (x->ealg && x->ealg->alg_key_len) {
630 encrypt_key_size =
631 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
632 size += sizeof(struct sadb_key) + encrypt_key_size;
633 }
634 }
635 if (x->encap)
636 natt = x->encap;
637
638 if (natt && natt->encap_type) {
639 size += sizeof(struct sadb_x_nat_t_type);
640 size += sizeof(struct sadb_x_nat_t_port);
641 size += sizeof(struct sadb_x_nat_t_port);
642 }
643
644 skb = alloc_skb(size + 16, GFP_ATOMIC);
645 if (skb == NULL)
646 return ERR_PTR(-ENOBUFS);
647
648 /* call should fill header later */
649 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
650 memset(hdr, 0, size); /* XXX do we need this ? */
651 hdr->sadb_msg_len = size / sizeof(uint64_t);
652
653 /* sa */
654 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
655 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
656 sa->sadb_sa_exttype = SADB_EXT_SA;
657 sa->sadb_sa_spi = x->id.spi;
658 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 659 switch (x->km.state) {
660 case XFRM_STATE_VALID:
661 sa->sadb_sa_state = x->km.dying ?
662 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
663 break;
664 case XFRM_STATE_ACQ:
1da177e4 665 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 666 break;
667 default:
1da177e4 668 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 669 break;
670 }
1da177e4
LT		 671 sa->sadb_sa_auth = 0;
672 if (x->aalg) {
673 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
674 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
675 }
676 sa->sadb_sa_encrypt = 0;
677 BUG_ON(x->ealg && x->calg);
678 if (x->ealg) {
679 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
680 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
681 }
682 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
683 if (x->calg) {
684 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
685 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
686 }
687
688 sa->sadb_sa_flags = 0;
689 if (x->props.flags & XFRM_STATE_NOECN)
690 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
691 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
692 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
693
694 /* hard time */
695 if (hsc & 2) {
696 lifetime = (struct sadb_lifetime *) skb_put(skb,
697 sizeof(struct sadb_lifetime));
698 lifetime->sadb_lifetime_len =
699 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
700 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
701 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
702 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
703 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
704 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
705 }
706 /* soft time */
707 if (hsc & 1) {
708 lifetime = (struct sadb_lifetime *) skb_put(skb,
709 sizeof(struct sadb_lifetime));
710 lifetime->sadb_lifetime_len =
711 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
712 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
713 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
714 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
715 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
716 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
717 }
718 /* current time */
719 lifetime = (struct sadb_lifetime *) skb_put(skb,
720 sizeof(struct sadb_lifetime));
721 lifetime->sadb_lifetime_len =
722 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
723 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
724 lifetime->sadb_lifetime_allocations = x->curlft.packets;
725 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
726 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
727 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
728 /* src address */
729 addr = (struct sadb_address*) skb_put(skb,
730 sizeof(struct sadb_address)+sockaddr_size);
731 addr->sadb_address_len =
732 (sizeof(struct sadb_address)+sockaddr_size)/
733 sizeof(uint64_t);
734 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
735 /* "if the ports are non-zero, then the sadb_address_proto field,
736 normally zero, MUST be filled in with the transport
737 protocol's number." - RFC2367 */
738 addr->sadb_address_proto = 0;
739 addr->sadb_address_reserved = 0;
740 if (x->props.family == AF_INET) {
741 addr->sadb_address_prefixlen = 32;
742
743 sin = (struct sockaddr_in *) (addr + 1);
744 sin->sin_family = AF_INET;
745 sin->sin_addr.s_addr = x->props.saddr.a4;
746 sin->sin_port = 0;
747 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
748 }
749#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
750 else if (x->props.family == AF_INET6) {
751 addr->sadb_address_prefixlen = 128;
752
753 sin6 = (struct sockaddr_in6 *) (addr + 1);
754 sin6->sin6_family = AF_INET6;
755 sin6->sin6_port = 0;
756 sin6->sin6_flowinfo = 0;
757 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
758 sizeof(struct in6_addr));
759 sin6->sin6_scope_id = 0;
760 }
761#endif
762 else
763 BUG();
764
765 /* dst address */
766 addr = (struct sadb_address*) skb_put(skb,
767 sizeof(struct sadb_address)+sockaddr_size);
768 addr->sadb_address_len =
769 (sizeof(struct sadb_address)+sockaddr_size)/
770 sizeof(uint64_t);
771 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
772 addr->sadb_address_proto = 0;
773 addr->sadb_address_prefixlen = 32; /* XXX */
774 addr->sadb_address_reserved = 0;
775 if (x->props.family == AF_INET) {
776 sin = (struct sockaddr_in *) (addr + 1);
777 sin->sin_family = AF_INET;
778 sin->sin_addr.s_addr = x->id.daddr.a4;
779 sin->sin_port = 0;
780 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
781
782 if (x->sel.saddr.a4 != x->props.saddr.a4) {
783 addr = (struct sadb_address*) skb_put(skb,
784 sizeof(struct sadb_address)+sockaddr_size);
785 addr->sadb_address_len =
786 (sizeof(struct sadb_address)+sockaddr_size)/
787 sizeof(uint64_t);
788 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
789 addr->sadb_address_proto =
790 pfkey_proto_from_xfrm(x->sel.proto);
791 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
792 addr->sadb_address_reserved = 0;
793
794 sin = (struct sockaddr_in *) (addr + 1);
795 sin->sin_family = AF_INET;
796 sin->sin_addr.s_addr = x->sel.saddr.a4;
797 sin->sin_port = x->sel.sport;
798 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
799 }
800 }
801#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
802 else if (x->props.family == AF_INET6) {
803 addr->sadb_address_prefixlen = 128;
804
805 sin6 = (struct sockaddr_in6 *) (addr + 1);
806 sin6->sin6_family = AF_INET6;
807 sin6->sin6_port = 0;
808 sin6->sin6_flowinfo = 0;
809 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
810 sin6->sin6_scope_id = 0;
811
812 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
813 sizeof(struct in6_addr))) {
814 addr = (struct sadb_address *) skb_put(skb,
815 sizeof(struct sadb_address)+sockaddr_size);
816 addr->sadb_address_len =
817 (sizeof(struct sadb_address)+sockaddr_size)/
818 sizeof(uint64_t);
819 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
820 addr->sadb_address_proto =
821 pfkey_proto_from_xfrm(x->sel.proto);
822 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
823 addr->sadb_address_reserved = 0;
824
825 sin6 = (struct sockaddr_in6 *) (addr + 1);
826 sin6->sin6_family = AF_INET6;
827 sin6->sin6_port = x->sel.sport;
828 sin6->sin6_flowinfo = 0;
829 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
830 sizeof(struct in6_addr));
831 sin6->sin6_scope_id = 0;
832 }
833 }
834#endif
835 else
836 BUG();
837
838 /* auth key */
839 if (add_keys && auth_key_size) {
840 key = (struct sadb_key *) skb_put(skb,
841 sizeof(struct sadb_key)+auth_key_size);
842 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
843 sizeof(uint64_t);
844 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
845 key->sadb_key_bits = x->aalg->alg_key_len;
846 key->sadb_key_reserved = 0;
847 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
848 }
849 /* encrypt key */
850 if (add_keys && encrypt_key_size) {
851 key = (struct sadb_key *) skb_put(skb,
852 sizeof(struct sadb_key)+encrypt_key_size);
853 key->sadb_key_len = (sizeof(struct sadb_key) +
854 encrypt_key_size) / sizeof(uint64_t);
855 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
856 key->sadb_key_bits = x->ealg->alg_key_len;
857 key->sadb_key_reserved = 0;
858 memcpy(key + 1, x->ealg->alg_key,
859 (x->ealg->alg_key_len+7)/8);
860 }
861
862 /* sa */
863 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
864 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
865 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
866 sa2->sadb_x_sa2_mode = x->props.mode + 1;
867 sa2->sadb_x_sa2_reserved1 = 0;
868 sa2->sadb_x_sa2_reserved2 = 0;
869 sa2->sadb_x_sa2_sequence = 0;
870 sa2->sadb_x_sa2_reqid = x->props.reqid;
871
872 if (natt && natt->encap_type) {
873 struct sadb_x_nat_t_type *n_type;
874 struct sadb_x_nat_t_port *n_port;
875
876 /* type */
877 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
878 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
879 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
880 n_type->sadb_x_nat_t_type_type = natt->encap_type;
881 n_type->sadb_x_nat_t_type_reserved[0] = 0;
882 n_type->sadb_x_nat_t_type_reserved[1] = 0;
883 n_type->sadb_x_nat_t_type_reserved[2] = 0;
884
885 /* source port */
886 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
887 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
888 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
889 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
890 n_port->sadb_x_nat_t_port_reserved = 0;
891
892 /* dest port */
893 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
894 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
895 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
896 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
897 n_port->sadb_x_nat_t_port_reserved = 0;
898 }
899
900 return skb;
901}
902
903static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
904 void **ext_hdrs)
905{
906 struct xfrm_state *x;
907 struct sadb_lifetime *lifetime;
908 struct sadb_sa *sa;
909 struct sadb_key *key;
910 uint16_t proto;
911 int err;
912
913
914 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
915 if (!sa ||
916 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
917 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
918 return ERR_PTR(-EINVAL);
919 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
920 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
921 return ERR_PTR(-EINVAL);
922 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
923 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
924 return ERR_PTR(-EINVAL);
925 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
926 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
927 return ERR_PTR(-EINVAL);
928
929 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
930 if (proto == 0)
931 return ERR_PTR(-EINVAL);
932
933 /* default error is no buffer space */
934 err = -ENOBUFS;
935
936 /* RFC2367:
937
938 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
939 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
940 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
941 Therefore, the sadb_sa_state field of all submitted SAs MUST be
942 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
943 not true.
944
945 However, KAME setkey always uses SADB_SASTATE_LARVAL.
946 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
947 */
948 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
949 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
950 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
951 sa->sadb_sa_encrypt > SADB_EALG_MAX)
952 return ERR_PTR(-EINVAL);
953 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
954 if (key != NULL &&
955 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
956 ((key->sadb_key_bits+7) / 8 == 0 ||
957 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
958 return ERR_PTR(-EINVAL);
959 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
960 if (key != NULL &&
961 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
962 ((key->sadb_key_bits+7) / 8 == 0 ||
963 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
964 return ERR_PTR(-EINVAL);
965
966 x = xfrm_state_alloc();
967 if (x == NULL)
968 return ERR_PTR(-ENOBUFS);
969
970 x->id.proto = proto;
971 x->id.spi = sa->sadb_sa_spi;
972 x->props.replay_window = sa->sadb_sa_replay;
973 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
974 x->props.flags |= XFRM_STATE_NOECN;
975 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
976 x->props.flags |= XFRM_STATE_DECAP_DSCP;
977
978 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
979 if (lifetime != NULL) {
980 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
981 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
982 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
983 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
984 }
985 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
986 if (lifetime != NULL) {
987 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
988 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
989 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
990 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
991 }
992 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
993 if (sa->sadb_sa_auth) {
994 int keysize = 0;
995 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
996 if (!a) {
997 err = -ENOSYS;
998 goto out;
999 }
1000 if (key)
1001 keysize = (key->sadb_key_bits + 7) / 8;
1002 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1003 if (!x->aalg)
1004 goto out;
1005 strcpy(x->aalg->alg_name, a->name);
1006 x->aalg->alg_key_len = 0;
1007 if (key) {
1008 x->aalg->alg_key_len = key->sadb_key_bits;
1009 memcpy(x->aalg->alg_key, key+1, keysize);
1010 }
1011 x->props.aalgo = sa->sadb_sa_auth;
1012 /* x->algo.flags = sa->sadb_sa_flags; */
1013 }
1014 if (sa->sadb_sa_encrypt) {
1015 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1016 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1017 if (!a) {
1018 err = -ENOSYS;
1019 goto out;
1020 }
1021 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1022 if (!x->calg)
1023 goto out;
1024 strcpy(x->calg->alg_name, a->name);
1025 x->props.calgo = sa->sadb_sa_encrypt;
1026 } else {
1027 int keysize = 0;
1028 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1029 if (!a) {
1030 err = -ENOSYS;
1031 goto out;
1032 }
1033 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1034 if (key)
1035 keysize = (key->sadb_key_bits + 7) / 8;
1036 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1037 if (!x->ealg)
1038 goto out;
1039 strcpy(x->ealg->alg_name, a->name);
1040 x->ealg->alg_key_len = 0;
1041 if (key) {
1042 x->ealg->alg_key_len = key->sadb_key_bits;
1043 memcpy(x->ealg->alg_key, key+1, keysize);
1044 }
1045 x->props.ealgo = sa->sadb_sa_encrypt;
1046 }
1047 }
1048 /* x->algo.flags = sa->sadb_sa_flags; */
1049
1050 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1051 &x->props.saddr);
1052 if (!x->props.family) {
1053 err = -EAFNOSUPPORT;
1054 goto out;
1055 }
1056 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1057 &x->id.daddr);
1058
1059 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1060 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1061 x->props.mode = sa2->sadb_x_sa2_mode;
1062 if (x->props.mode)
1063 x->props.mode--;
1064 x->props.reqid = sa2->sadb_x_sa2_reqid;
1065 }
1066
1067 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1068 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1069
1070 /* Nobody uses this, but we try. */
1071 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1072 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1073 }
1074
1075 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1076 struct sadb_x_nat_t_type* n_type;
1077 struct xfrm_encap_tmpl *natt;
1078
1079 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1080 if (!x->encap)
1081 goto out;
1082
1083 natt = x->encap;
1084 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1085 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1086
1087 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1088 struct sadb_x_nat_t_port* n_port =
1089 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1090 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1091 }
1092 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1093 struct sadb_x_nat_t_port* n_port =
1094 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1095 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1096 }
1097 }
1098
72cb6962
HX		 1099 err = xfrm_init_state(x);
1100 if (err)
1da177e4 1101 goto out;
72cb6962 1102
1da177e4 1103 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1104 return x;
1105
1106out:
1107 x->km.state = XFRM_STATE_DEAD;
1108 xfrm_state_put(x);
1109 return ERR_PTR(err);
1110}
1111
1112static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1113{
1114 return -EOPNOTSUPP;
1115}
1116
1117static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1118{
1119 struct sk_buff *resp_skb;
1120 struct sadb_x_sa2 *sa2;
1121 struct sadb_address *saddr, *daddr;
1122 struct sadb_msg *out_hdr;
1123 struct xfrm_state *x = NULL;
1124 u8 mode;
1125 u32 reqid;
1126 u8 proto;
1127 unsigned short family;
1128 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1129
1130 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1131 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1132 return -EINVAL;
1133
1134 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1135 if (proto == 0)
1136 return -EINVAL;
1137
1138 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1139 mode = sa2->sadb_x_sa2_mode - 1;
1140 reqid = sa2->sadb_x_sa2_reqid;
1141 } else {
1142 mode = 0;
1143 reqid = 0;
1144 }
1145
1146 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1147 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1148
1149 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1150 switch (family) {
1151 case AF_INET:
1152 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1153 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1154 break;
1155#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1156 case AF_INET6:
1157 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1158 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1159 break;
1160#endif
1161 }
1162
1163 if (hdr->sadb_msg_seq) {
1164 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1165 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1166 xfrm_state_put(x);
1167 x = NULL;
1168 }
1169 }
1170
1171 if (!x)
1172 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1173
1174 if (x == NULL)
1175 return -ENOENT;
1176
1177 resp_skb = ERR_PTR(-ENOENT);
1178
1179 spin_lock_bh(&x->lock);
1180 if (x->km.state != XFRM_STATE_DEAD) {
1181 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1182 u32 min_spi, max_spi;
1183
1184 if (range != NULL) {
1185 min_spi = range->sadb_spirange_min;
1186 max_spi = range->sadb_spirange_max;
1187 } else {
1188 min_spi = 0x100;
1189 max_spi = 0x0fffffff;
1190 }
1191 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1192 if (x->id.spi)
1193 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1194 }
1195 spin_unlock_bh(&x->lock);
1196
1197 if (IS_ERR(resp_skb)) {
1198 xfrm_state_put(x);
1199 return PTR_ERR(resp_skb);
1200 }
1201
1202 out_hdr = (struct sadb_msg *) resp_skb->data;
1203 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1204 out_hdr->sadb_msg_type = SADB_GETSPI;
1205 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1206 out_hdr->sadb_msg_errno = 0;
1207 out_hdr->sadb_msg_reserved = 0;
1208 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1209 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1210
1211 xfrm_state_put(x);
1212
1213 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1214
1215 return 0;
1216}
1217
1218static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1219{
1220 struct xfrm_state *x;
1221
1222 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1223 return -EOPNOTSUPP;
1224
1225 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1226 return 0;
1227
1228 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1229 if (x == NULL)
1230 return 0;
1231
1232 spin_lock_bh(&x->lock);
1233 if (x->km.state == XFRM_STATE_ACQ) {
1234 x->km.state = XFRM_STATE_ERROR;
1235 wake_up(&km_waitq);
1236 }
1237 spin_unlock_bh(&x->lock);
1238 xfrm_state_put(x);
1239 return 0;
1240}
1241
26b15dad
JHS		 1242static inline int event2poltype(int event)
1243{
1244 switch (event) {
f60f6b8f 1245 case XFRM_MSG_DELPOLICY:
26b15dad 1246 return SADB_X_SPDDELETE;
f60f6b8f 1247 case XFRM_MSG_NEWPOLICY:
26b15dad 1248 return SADB_X_SPDADD;
f60f6b8f 1249 case XFRM_MSG_UPDPOLICY:
26b15dad 1250 return SADB_X_SPDUPDATE;
f60f6b8f 1251 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1252 // return SADB_X_SPDEXPIRE;
1253 default:
1254 printk("pfkey: Unknown policy event %d\n", event);
1255 break;
1256 }
1257
1258 return 0;
1259}
1260
1261static inline int event2keytype(int event)
1262{
1263 switch (event) {
f60f6b8f 1264 case XFRM_MSG_DELSA:
26b15dad 1265 return SADB_DELETE;
f60f6b8f 1266 case XFRM_MSG_NEWSA:
26b15dad 1267 return SADB_ADD;
f60f6b8f 1268 case XFRM_MSG_UPDSA:
26b15dad 1269 return SADB_UPDATE;
f60f6b8f 1270 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1271 return SADB_EXPIRE;
1272 default:
1273 printk("pfkey: Unknown SA event %d\n", event);
1274 break;
1275 }
1276
1277 return 0;
1278}
1279
1280/* ADD/UPD/DEL */
1281static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1282{
1283 struct sk_buff *skb;
1284 struct sadb_msg *hdr;
1285 int hsc = 3;
1286
f60f6b8f 1287 if (c->event == XFRM_MSG_DELSA)
26b15dad
JHS		 1288 hsc = 0;
1289
26b15dad
JHS		 1290 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1291
1292 if (IS_ERR(skb))
1293 return PTR_ERR(skb);
1294
1295 hdr = (struct sadb_msg *) skb->data;
1296 hdr->sadb_msg_version = PF_KEY_V2;
1297 hdr->sadb_msg_type = event2keytype(c->event);
1298 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1299 hdr->sadb_msg_errno = 0;
1300 hdr->sadb_msg_reserved = 0;
1301 hdr->sadb_msg_seq = c->seq;
1302 hdr->sadb_msg_pid = c->pid;
1303
1304 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1305
1306 return 0;
1307}
1da177e4
LT		 1308
1309static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1310{
1da177e4
LT		 1311 struct xfrm_state *x;
1312 int err;
26b15dad 1313 struct km_event c;
1da177e4
LT		 1314
1315 xfrm_probe_algs();
1316
1317 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1318 if (IS_ERR(x))
1319 return PTR_ERR(x);
1320
26b15dad 1321 xfrm_state_hold(x);
1da177e4
LT		 1322 if (hdr->sadb_msg_type == SADB_ADD)
1323 err = xfrm_state_add(x);
1324 else
1325 err = xfrm_state_update(x);
1326
1327 if (err < 0) {
1328 x->km.state = XFRM_STATE_DEAD;
1329 xfrm_state_put(x);
7d6dfe1f 1330 goto out;
1da177e4
LT		 1331 }
1332
26b15dad 1333 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1334 c.event = XFRM_MSG_NEWSA;
26b15dad 1335 else
f60f6b8f 1336 c.event = XFRM_MSG_UPDSA;
26b15dad
JHS		 1337 c.seq = hdr->sadb_msg_seq;
1338 c.pid = hdr->sadb_msg_pid;
1339 km_state_notify(x, &c);
7d6dfe1f 1340out:
26b15dad 1341 xfrm_state_put(x);
26b15dad 1342 return err;
1da177e4
LT		 1343}
1344
1345static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1346{
1347 struct xfrm_state *x;
26b15dad
JHS		 1348 struct km_event c;
1349 int err;
1da177e4
LT		 1350
1351 if (!ext_hdrs[SADB_EXT_SA-1] ||
1352 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1353 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1354 return -EINVAL;
1355
1356 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1357 if (x == NULL)
1358 return -ESRCH;
1359
1360 if (xfrm_state_kern(x)) {
1361 xfrm_state_put(x);
1362 return -EPERM;
1363 }
1364
26b15dad
JHS		 1365 err = xfrm_state_delete(x);
1366 if (err < 0) {
1367 xfrm_state_put(x);
1368 return err;
1369 }
1da177e4 1370
26b15dad
JHS		 1371 c.seq = hdr->sadb_msg_seq;
1372 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1373 c.event = XFRM_MSG_DELSA;
26b15dad
JHS		 1374 km_state_notify(x, &c);
1375 xfrm_state_put(x);
1da177e4 1376
26b15dad 1377 return err;
1da177e4
LT		 1378}
1379
1380static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1381{
1382 __u8 proto;
1383 struct sk_buff *out_skb;
1384 struct sadb_msg *out_hdr;
1385 struct xfrm_state *x;
1386
1387 if (!ext_hdrs[SADB_EXT_SA-1] ||
1388 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1389 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1390 return -EINVAL;
1391
1392 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1393 if (x == NULL)
1394 return -ESRCH;
1395
1396 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1397 proto = x->id.proto;
1398 xfrm_state_put(x);
1399 if (IS_ERR(out_skb))
1400 return PTR_ERR(out_skb);
1401
1402 out_hdr = (struct sadb_msg *) out_skb->data;
1403 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1404 out_hdr->sadb_msg_type = SADB_DUMP;
1405 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1406 out_hdr->sadb_msg_errno = 0;
1407 out_hdr->sadb_msg_reserved = 0;
1408 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1409 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1410 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1411
1412 return 0;
1413}
1414
1415static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, int allocation)
1416{
1417 struct sk_buff *skb;
1418 struct sadb_msg *hdr;
1419 int len, auth_len, enc_len, i;
1420
1421 auth_len = xfrm_count_auth_supported();
1422 if (auth_len) {
1423 auth_len *= sizeof(struct sadb_alg);
1424 auth_len += sizeof(struct sadb_supported);
1425 }
1426
1427 enc_len = xfrm_count_enc_supported();
1428 if (enc_len) {
1429 enc_len *= sizeof(struct sadb_alg);
1430 enc_len += sizeof(struct sadb_supported);
1431 }
1432
1433 len = enc_len + auth_len + sizeof(struct sadb_msg);
1434
1435 skb = alloc_skb(len + 16, allocation);
1436 if (!skb)
1437 goto out_put_algs;
1438
1439 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1440 pfkey_hdr_dup(hdr, orig);
1441 hdr->sadb_msg_errno = 0;
1442 hdr->sadb_msg_len = len / sizeof(uint64_t);
1443
1444 if (auth_len) {
1445 struct sadb_supported *sp;
1446 struct sadb_alg *ap;
1447
1448 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1449 ap = (struct sadb_alg *) (sp + 1);
1450
1451 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1452 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1453
1454 for (i = 0; ; i++) {
1455 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1456 if (!aalg)
1457 break;
1458 if (aalg->available)
1459 *ap++ = aalg->desc;
1460 }
1461 }
1462
1463 if (enc_len) {
1464 struct sadb_supported *sp;
1465 struct sadb_alg *ap;
1466
1467 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1468 ap = (struct sadb_alg *) (sp + 1);
1469
1470 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1471 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1472
1473 for (i = 0; ; i++) {
1474 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1475 if (!ealg)
1476 break;
1477 if (ealg->available)
1478 *ap++ = ealg->desc;
1479 }
1480 }
1481
1482out_put_algs:
1483 return skb;
1484}
1485
1486static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1487{
1488 struct pfkey_sock *pfk = pfkey_sk(sk);
1489 struct sk_buff *supp_skb;
1490
1491 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1492 return -EINVAL;
1493
1494 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1495 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1496 return -EEXIST;
1497 pfk->registered |= (1<<hdr->sadb_msg_satype);
1498 }
1499
1500 xfrm_probe_algs();
1501
1502 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1503 if (!supp_skb) {
1504 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1505 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1506
1507 return -ENOBUFS;
1508 }
1509
1510 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1511
1512 return 0;
1513}
1514
26b15dad
JHS		 1515static int key_notify_sa_flush(struct km_event *c)
1516{
1517 struct sk_buff *skb;
1518 struct sadb_msg *hdr;
1519
1520 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1521 if (!skb)
1522 return -ENOBUFS;
1523 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1524 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
26b15dad
JHS		 1525 hdr->sadb_msg_seq = c->seq;
1526 hdr->sadb_msg_pid = c->pid;
1527 hdr->sadb_msg_version = PF_KEY_V2;
1528 hdr->sadb_msg_errno = (uint8_t) 0;
1529 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1530
1531 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1532
1533 return 0;
1534}
1535
1da177e4
LT		 1536static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1537{
1538 unsigned proto;
26b15dad 1539 struct km_event c;
1da177e4
LT		 1540
1541 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1542 if (proto == 0)
1543 return -EINVAL;
1544
1da177e4 1545 xfrm_state_flush(proto);
bf08867f 1546 c.data.proto = proto;
26b15dad
JHS		 1547 c.seq = hdr->sadb_msg_seq;
1548 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1549 c.event = XFRM_MSG_FLUSHSA;
26b15dad 1550 km_state_notify(NULL, &c);
1da177e4
LT		 1551
1552 return 0;
1553}
1554
1555struct pfkey_dump_data
1556{
1557 struct sk_buff *skb;
1558 struct sadb_msg *hdr;
1559 struct sock *sk;
1560};
1561
1562static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1563{
1564 struct pfkey_dump_data *data = ptr;
1565 struct sk_buff *out_skb;
1566 struct sadb_msg *out_hdr;
1567
1568 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1569 if (IS_ERR(out_skb))
1570 return PTR_ERR(out_skb);
1571
1572 out_hdr = (struct sadb_msg *) out_skb->data;
1573 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1574 out_hdr->sadb_msg_type = SADB_DUMP;
1575 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1576 out_hdr->sadb_msg_errno = 0;
1577 out_hdr->sadb_msg_reserved = 0;
1578 out_hdr->sadb_msg_seq = count;
1579 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1580 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1581 return 0;
1582}
1583
1584static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1585{
1586 u8 proto;
1587 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1588
1589 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1590 if (proto == 0)
1591 return -EINVAL;
1592
1593 return xfrm_state_walk(proto, dump_sa, &data);
1594}
1595
1596static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1597{
1598 struct pfkey_sock *pfk = pfkey_sk(sk);
1599 int satype = hdr->sadb_msg_satype;
1600
1601 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1602 /* XXX we mangle packet... */
1603 hdr->sadb_msg_errno = 0;
1604 if (satype != 0 && satype != 1)
1605 return -EINVAL;
1606 pfk->promisc = satype;
1607 }
1608 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1609 return 0;
1610}
1611
1612static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1613{
1614 int i;
1615 u32 reqid = *(u32*)ptr;
1616
1617 for (i=0; i<xp->xfrm_nr; i++) {
1618 if (xp->xfrm_vec[i].reqid == reqid)
1619 return -EEXIST;
1620 }
1621 return 0;
1622}
1623
1624static u32 gen_reqid(void)
1625{
1626 u32 start;
1627 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1628
1629 start = reqid;
1630 do {
1631 ++reqid;
1632 if (reqid == 0)
1633 reqid = IPSEC_MANUAL_REQID_MAX+1;
1634 if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST)
1635 return reqid;
1636 } while (reqid != start);
1637 return 0;
1638}
1639
1640static int
1641parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1642{
1643 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1644 struct sockaddr_in *sin;
1645#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1646 struct sockaddr_in6 *sin6;
1647#endif
1648
1649 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1650 return -ELOOP;
1651
1652 if (rq->sadb_x_ipsecrequest_mode == 0)
1653 return -EINVAL;
1654
1655 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1656 t->mode = rq->sadb_x_ipsecrequest_mode-1;
1657 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1658 t->optional = 1;
1659 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1660 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1661 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1662 t->reqid = 0;
1663 if (!t->reqid && !(t->reqid = gen_reqid()))
1664 return -ENOBUFS;
1665 }
1666
1667 /* addresses present only in tunnel mode */
1668 if (t->mode) {
1669 switch (xp->family) {
1670 case AF_INET:
1671 sin = (void*)(rq+1);
1672 if (sin->sin_family != AF_INET)
1673 return -EINVAL;
1674 t->saddr.a4 = sin->sin_addr.s_addr;
1675 sin++;
1676 if (sin->sin_family != AF_INET)
1677 return -EINVAL;
1678 t->id.daddr.a4 = sin->sin_addr.s_addr;
1679 break;
1680#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1681 case AF_INET6:
1682 sin6 = (void *)(rq+1);
1683 if (sin6->sin6_family != AF_INET6)
1684 return -EINVAL;
1685 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1686 sin6++;
1687 if (sin6->sin6_family != AF_INET6)
1688 return -EINVAL;
1689 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1690 break;
1691#endif
1692 default:
1693 return -EINVAL;
1694 }
1695 }
1696 /* No way to set this via kame pfkey */
1697 t->aalgos = t->ealgos = t->calgos = ~0;
1698 xp->xfrm_nr++;
1699 return 0;
1700}
1701
1702static int
1703parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1704{
1705 int err;
1706 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1707 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1708
1709 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1710 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1711 return err;
1712 len -= rq->sadb_x_ipsecrequest_len;
1713 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1714 }
1715 return 0;
1716}
1717
1718static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1719{
1720 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1721 int socklen = (xp->family == AF_INET ?
1722 sizeof(struct sockaddr_in) :
1723 sizeof(struct sockaddr_in6));
1724
1725 return sizeof(struct sadb_msg) +
1726 (sizeof(struct sadb_lifetime) * 3) +
1727 (sizeof(struct sadb_address) * 2) +
1728 (sockaddr_size * 2) +
1729 sizeof(struct sadb_x_policy) +
1730 (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) +
1731 (socklen * 2)));
1732}
1733
1734static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1735{
1736 struct sk_buff *skb;
1737 int size;
1738
1739 size = pfkey_xfrm_policy2msg_size(xp);
1740
1741 skb = alloc_skb(size + 16, GFP_ATOMIC);
1742 if (skb == NULL)
1743 return ERR_PTR(-ENOBUFS);
1744
1745 return skb;
1746}
1747
1748static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1749{
1750 struct sadb_msg *hdr;
1751 struct sadb_address *addr;
1752 struct sadb_lifetime *lifetime;
1753 struct sadb_x_policy *pol;
1754 struct sockaddr_in *sin;
1755#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1756 struct sockaddr_in6 *sin6;
1757#endif
1758 int i;
1759 int size;
1760 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1761 int socklen = (xp->family == AF_INET ?
1762 sizeof(struct sockaddr_in) :
1763 sizeof(struct sockaddr_in6));
1764
1765 size = pfkey_xfrm_policy2msg_size(xp);
1766
1767 /* call should fill header later */
1768 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1769 memset(hdr, 0, size); /* XXX do we need this ? */
1770
1771 /* src address */
1772 addr = (struct sadb_address*) skb_put(skb,
1773 sizeof(struct sadb_address)+sockaddr_size);
1774 addr->sadb_address_len =
1775 (sizeof(struct sadb_address)+sockaddr_size)/
1776 sizeof(uint64_t);
1777 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1778 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1779 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1780 addr->sadb_address_reserved = 0;
1781 /* src address */
1782 if (xp->family == AF_INET) {
1783 sin = (struct sockaddr_in *) (addr + 1);
1784 sin->sin_family = AF_INET;
1785 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1786 sin->sin_port = xp->selector.sport;
1787 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1788 }
1789#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1790 else if (xp->family == AF_INET6) {
1791 sin6 = (struct sockaddr_in6 *) (addr + 1);
1792 sin6->sin6_family = AF_INET6;
1793 sin6->sin6_port = xp->selector.sport;
1794 sin6->sin6_flowinfo = 0;
1795 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1796 sizeof(struct in6_addr));
1797 sin6->sin6_scope_id = 0;
1798 }
1799#endif
1800 else
1801 BUG();
1802
1803 /* dst address */
1804 addr = (struct sadb_address*) skb_put(skb,
1805 sizeof(struct sadb_address)+sockaddr_size);
1806 addr->sadb_address_len =
1807 (sizeof(struct sadb_address)+sockaddr_size)/
1808 sizeof(uint64_t);
1809 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1810 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1811 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1812 addr->sadb_address_reserved = 0;
1813 if (xp->family == AF_INET) {
1814 sin = (struct sockaddr_in *) (addr + 1);
1815 sin->sin_family = AF_INET;
1816 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1817 sin->sin_port = xp->selector.dport;
1818 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1819 }
1820#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1821 else if (xp->family == AF_INET6) {
1822 sin6 = (struct sockaddr_in6 *) (addr + 1);
1823 sin6->sin6_family = AF_INET6;
1824 sin6->sin6_port = xp->selector.dport;
1825 sin6->sin6_flowinfo = 0;
1826 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
1827 sizeof(struct in6_addr));
1828 sin6->sin6_scope_id = 0;
1829 }
1830#endif
1831 else
1832 BUG();
1833
1834 /* hard time */
1835 lifetime = (struct sadb_lifetime *) skb_put(skb,
1836 sizeof(struct sadb_lifetime));
1837 lifetime->sadb_lifetime_len =
1838 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1839 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
1840 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
1841 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
1842 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
1843 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
1844 /* soft time */
1845 lifetime = (struct sadb_lifetime *) skb_put(skb,
1846 sizeof(struct sadb_lifetime));
1847 lifetime->sadb_lifetime_len =
1848 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1849 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
1850 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
1851 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
1852 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
1853 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
1854 /* current time */
1855 lifetime = (struct sadb_lifetime *) skb_put(skb,
1856 sizeof(struct sadb_lifetime));
1857 lifetime->sadb_lifetime_len =
1858 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
1859 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
1860 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
1861 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
1862 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
1863 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
1864
1865 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
1866 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
1867 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1868 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
1869 if (xp->action == XFRM_POLICY_ALLOW) {
1870 if (xp->xfrm_nr)
1871 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
1872 else
1873 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
1874 }
1875 pol->sadb_x_policy_dir = dir+1;
1876 pol->sadb_x_policy_id = xp->index;
1877 pol->sadb_x_policy_priority = xp->priority;
1878
1879 for (i=0; i<xp->xfrm_nr; i++) {
1880 struct sadb_x_ipsecrequest *rq;
1881 struct xfrm_tmpl *t = xp->xfrm_vec + i;
1882 int req_size;
1883
1884 req_size = sizeof(struct sadb_x_ipsecrequest);
1885 if (t->mode)
1886 req_size += 2*socklen;
1887 else
1888 size -= 2*socklen;
1889 rq = (void*)skb_put(skb, req_size);
1890 pol->sadb_x_policy_len += req_size/8;
1891 memset(rq, 0, sizeof(*rq));
1892 rq->sadb_x_ipsecrequest_len = req_size;
1893 rq->sadb_x_ipsecrequest_proto = t->id.proto;
1894 rq->sadb_x_ipsecrequest_mode = t->mode+1;
1895 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
1896 if (t->reqid)
1897 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
1898 if (t->optional)
1899 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
1900 rq->sadb_x_ipsecrequest_reqid = t->reqid;
1901 if (t->mode) {
1902 switch (xp->family) {
1903 case AF_INET:
1904 sin = (void*)(rq+1);
1905 sin->sin_family = AF_INET;
1906 sin->sin_addr.s_addr = t->saddr.a4;
1907 sin->sin_port = 0;
1908 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1909 sin++;
1910 sin->sin_family = AF_INET;
1911 sin->sin_addr.s_addr = t->id.daddr.a4;
1912 sin->sin_port = 0;
1913 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1914 break;
1915#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1916 case AF_INET6:
1917 sin6 = (void*)(rq+1);
1918 sin6->sin6_family = AF_INET6;
1919 sin6->sin6_port = 0;
1920 sin6->sin6_flowinfo = 0;
1921 memcpy(&sin6->sin6_addr, t->saddr.a6,
1922 sizeof(struct in6_addr));
1923 sin6->sin6_scope_id = 0;
1924
1925 sin6++;
1926 sin6->sin6_family = AF_INET6;
1927 sin6->sin6_port = 0;
1928 sin6->sin6_flowinfo = 0;
1929 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
1930 sizeof(struct in6_addr));
1931 sin6->sin6_scope_id = 0;
1932 break;
1933#endif
1934 default:
1935 break;
1936 }
1937 }
1938 }
1939 hdr->sadb_msg_len = size / sizeof(uint64_t);
1940 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
1941}
1942
26b15dad
JHS		 1943static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
1944{
1945 struct sk_buff *out_skb;
1946 struct sadb_msg *out_hdr;
1947 int err;
1948
1949 out_skb = pfkey_xfrm_policy2msg_prep(xp);
1950 if (IS_ERR(out_skb)) {
1951 err = PTR_ERR(out_skb);
1952 goto out;
1953 }
1954 pfkey_xfrm_policy2msg(out_skb, xp, dir);
1955
1956 out_hdr = (struct sadb_msg *) out_skb->data;
1957 out_hdr->sadb_msg_version = PF_KEY_V2;
1958
f60f6b8f 1959 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 1960 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
1961 else
1962 out_hdr->sadb_msg_type = event2poltype(c->event);
1963 out_hdr->sadb_msg_errno = 0;
1964 out_hdr->sadb_msg_seq = c->seq;
1965 out_hdr->sadb_msg_pid = c->pid;
1966 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1967out:
1968 return 0;
1969
1970}
1971
1da177e4
LT		 1972static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1973{
1974 int err;
1975 struct sadb_lifetime *lifetime;
1976 struct sadb_address *sa;
1977 struct sadb_x_policy *pol;
1978 struct xfrm_policy *xp;
26b15dad 1979 struct km_event c;
1da177e4
LT		 1980
1981 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1982 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
1983 !ext_hdrs[SADB_X_EXT_POLICY-1])
1984 return -EINVAL;
1985
1986 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
1987 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
1988 return -EINVAL;
1989 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
1990 return -EINVAL;
1991
1992 xp = xfrm_policy_alloc(GFP_KERNEL);
1993 if (xp == NULL)
1994 return -ENOBUFS;
1995
1996 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
1997 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
1998 xp->priority = pol->sadb_x_policy_priority;
1999
2000 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2001 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2002 if (!xp->family) {
2003 err = -EINVAL;
2004 goto out;
2005 }
2006 xp->selector.family = xp->family;
2007 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2008 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2009 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2010 if (xp->selector.sport)
2011 xp->selector.sport_mask = ~0;
2012
2013 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2014 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2015 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2016
2017 /* Amusing, we set this twice. KAME apps appear to set same value
2018 * in both addresses.
2019 */
2020 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2021
2022 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2023 if (xp->selector.dport)
2024 xp->selector.dport_mask = ~0;
2025
2026 xp->lft.soft_byte_limit = XFRM_INF;
2027 xp->lft.hard_byte_limit = XFRM_INF;
2028 xp->lft.soft_packet_limit = XFRM_INF;
2029 xp->lft.hard_packet_limit = XFRM_INF;
2030 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2031 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2032 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2033 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2034 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2035 }
2036 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2037 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2038 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2039 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2040 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2041 }
2042 xp->xfrm_nr = 0;
2043 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2044 (err = parse_ipsecrequests(xp, pol)) < 0)
2045 goto out;
2046
1da177e4
LT		 2047 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2048 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2049 if (err) {
26b15dad
JHS		 2050 kfree(xp);
2051 return err;
1da177e4
LT		 2052 }
2053
26b15dad 2054 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f
HX		 2055 c.event = XFRM_MSG_UPDPOLICY;
2056 else
2057 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2058
26b15dad
JHS		 2059 c.seq = hdr->sadb_msg_seq;
2060 c.pid = hdr->sadb_msg_pid;
1da177e4 2061
26b15dad
JHS		 2062 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2063 xfrm_pol_put(xp);
1da177e4
LT		 2064 return 0;
2065
2066out:
2067 kfree(xp);
2068 return err;
2069}
2070
2071static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2072{
2073 int err;
2074 struct sadb_address *sa;
2075 struct sadb_x_policy *pol;
2076 struct xfrm_policy *xp;
1da177e4 2077 struct xfrm_selector sel;
26b15dad 2078 struct km_event c;
1da177e4
LT		 2079
2080 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2081 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2082 !ext_hdrs[SADB_X_EXT_POLICY-1])
2083 return -EINVAL;
2084
2085 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2086 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2087 return -EINVAL;
2088
2089 memset(&sel, 0, sizeof(sel));
2090
2091 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2092 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2093 sel.prefixlen_s = sa->sadb_address_prefixlen;
2094 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2095 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2096 if (sel.sport)
2097 sel.sport_mask = ~0;
2098
2099 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2100 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2101 sel.prefixlen_d = sa->sadb_address_prefixlen;
2102 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2103 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2104 if (sel.dport)
2105 sel.dport_mask = ~0;
2106
2107 xp = xfrm_policy_bysel(pol->sadb_x_policy_dir-1, &sel, 1);
2108 if (xp == NULL)
2109 return -ENOENT;
2110
2111 err = 0;
2112
26b15dad
JHS		 2113 c.seq = hdr->sadb_msg_seq;
2114 c.pid = hdr->sadb_msg_pid;
f60f6b8f 2115 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2116 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2117
2118 xfrm_pol_put(xp);
2119 return err;
2120}
2121
2122static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2123{
2124 int err;
2125 struct sk_buff *out_skb;
2126 struct sadb_msg *out_hdr;
2127 err = 0;
2128
1da177e4
LT		 2129 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2130 if (IS_ERR(out_skb)) {
2131 err = PTR_ERR(out_skb);
2132 goto out;
2133 }
26b15dad 2134 pfkey_xfrm_policy2msg(out_skb, xp, dir);
1da177e4
LT		 2135
2136 out_hdr = (struct sadb_msg *) out_skb->data;
2137 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2138 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2139 out_hdr->sadb_msg_satype = 0;
2140 out_hdr->sadb_msg_errno = 0;
2141 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2142 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
26b15dad 2143 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1da177e4
LT		 2144 err = 0;
2145
2146out:
1da177e4
LT		 2147 return err;
2148}
2149
2150static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2151{
2152 int err;
2153 struct sadb_x_policy *pol;
2154 struct xfrm_policy *xp;
26b15dad 2155 struct km_event c;
1da177e4
LT		 2156
2157 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2158 return -EINVAL;
2159
2160 xp = xfrm_policy_byid(0, pol->sadb_x_policy_id,
2161 hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2162 if (xp == NULL)
2163 return -ENOENT;
2164
2165 err = 0;
2166
26b15dad
JHS		 2167 c.seq = hdr->sadb_msg_seq;
2168 c.pid = hdr->sadb_msg_pid;
2169 if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
bf08867f 2170 c.data.byid = 1;
f60f6b8f 2171 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2172 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2173 } else {
2174 err = key_pol_get_resp(sk, xp, hdr, pol->sadb_x_policy_dir-1);
1da177e4 2175 }
1da177e4 2176
1da177e4
LT		 2177 xfrm_pol_put(xp);
2178 return err;
2179}
2180
2181static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2182{
2183 struct pfkey_dump_data *data = ptr;
2184 struct sk_buff *out_skb;
2185 struct sadb_msg *out_hdr;
2186
2187 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2188 if (IS_ERR(out_skb))
2189 return PTR_ERR(out_skb);
2190
2191 pfkey_xfrm_policy2msg(out_skb, xp, dir);
2192
2193 out_hdr = (struct sadb_msg *) out_skb->data;
2194 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2195 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2196 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2197 out_hdr->sadb_msg_errno = 0;
2198 out_hdr->sadb_msg_seq = count;
2199 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2200 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2201 return 0;
2202}
2203
2204static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2205{
2206 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2207
2208 return xfrm_policy_walk(dump_sp, &data);
2209}
2210
26b15dad 2211static int key_notify_policy_flush(struct km_event *c)
1da177e4
LT		 2212{
2213 struct sk_buff *skb_out;
26b15dad 2214 struct sadb_msg *hdr;
1da177e4 2215
26b15dad 2216 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2217 if (!skb_out)
2218 return -ENOBUFS;
26b15dad
JHS		 2219 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2220 hdr->sadb_msg_seq = c->seq;
2221 hdr->sadb_msg_pid = c->pid;
2222 hdr->sadb_msg_version = PF_KEY_V2;
2223 hdr->sadb_msg_errno = (uint8_t) 0;
2224 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2225 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2226 return 0;
1da177e4 2227
26b15dad
JHS		 2228}
2229
2230static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2231{
2232 struct km_event c;
1da177e4 2233
26b15dad 2234 xfrm_policy_flush();
f60f6b8f 2235 c.event = XFRM_MSG_FLUSHPOLICY;
26b15dad
JHS		 2236 c.pid = hdr->sadb_msg_pid;
2237 c.seq = hdr->sadb_msg_seq;
2238 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2239
2240 return 0;
2241}
2242
2243typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2244 struct sadb_msg *hdr, void **ext_hdrs);
2245static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2246 [SADB_RESERVED] = pfkey_reserved,
2247 [SADB_GETSPI] = pfkey_getspi,
2248 [SADB_UPDATE] = pfkey_add,
2249 [SADB_ADD] = pfkey_add,
2250 [SADB_DELETE] = pfkey_delete,
2251 [SADB_GET] = pfkey_get,
2252 [SADB_ACQUIRE] = pfkey_acquire,
2253 [SADB_REGISTER] = pfkey_register,
2254 [SADB_EXPIRE] = NULL,
2255 [SADB_FLUSH] = pfkey_flush,
2256 [SADB_DUMP] = pfkey_dump,
2257 [SADB_X_PROMISC] = pfkey_promisc,
2258 [SADB_X_PCHANGE] = NULL,
2259 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2260 [SADB_X_SPDADD] = pfkey_spdadd,
2261 [SADB_X_SPDDELETE] = pfkey_spddelete,
2262 [SADB_X_SPDGET] = pfkey_spdget,
2263 [SADB_X_SPDACQUIRE] = NULL,
2264 [SADB_X_SPDDUMP] = pfkey_spddump,
2265 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2266 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2267 [SADB_X_SPDDELETE2] = pfkey_spdget,
2268};
2269
2270static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2271{
2272 void *ext_hdrs[SADB_EXT_MAX];
2273 int err;
2274
2275 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2276 BROADCAST_PROMISC_ONLY, NULL);
2277
2278 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2279 err = parse_exthdrs(skb, hdr, ext_hdrs);
2280 if (!err) {
2281 err = -EOPNOTSUPP;
2282 if (pfkey_funcs[hdr->sadb_msg_type])
2283 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2284 }
2285 return err;
2286}
2287
2288static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2289{
2290 struct sadb_msg *hdr = NULL;
2291
2292 if (skb->len < sizeof(*hdr)) {
2293 *errp = -EMSGSIZE;
2294 } else {
2295 hdr = (struct sadb_msg *) skb->data;
2296 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2297 hdr->sadb_msg_reserved != 0 ||
2298 (hdr->sadb_msg_type <= SADB_RESERVED ||
2299 hdr->sadb_msg_type > SADB_MAX)) {
2300 hdr = NULL;
2301 *errp = -EINVAL;
2302 } else if (hdr->sadb_msg_len != (skb->len /
2303 sizeof(uint64_t)) ||
2304 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2305 sizeof(uint64_t))) {
2306 hdr = NULL;
2307 *errp = -EMSGSIZE;
2308 } else {
2309 *errp = 0;
2310 }
2311 }
2312 return hdr;
2313}
2314
2315static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2316{
2317 return t->aalgos & (1 << d->desc.sadb_alg_id);
2318}
2319
2320static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2321{
2322 return t->ealgos & (1 << d->desc.sadb_alg_id);
2323}
2324
2325static int count_ah_combs(struct xfrm_tmpl *t)
2326{
2327 int i, sz = 0;
2328
2329 for (i = 0; ; i++) {
2330 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2331 if (!aalg)
2332 break;
2333 if (aalg_tmpl_set(t, aalg) && aalg->available)
2334 sz += sizeof(struct sadb_comb);
2335 }
2336 return sz + sizeof(struct sadb_prop);
2337}
2338
2339static int count_esp_combs(struct xfrm_tmpl *t)
2340{
2341 int i, k, sz = 0;
2342
2343 for (i = 0; ; i++) {
2344 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2345 if (!ealg)
2346 break;
2347
2348 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2349 continue;
2350
2351 for (k = 1; ; k++) {
2352 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2353 if (!aalg)
2354 break;
2355
2356 if (aalg_tmpl_set(t, aalg) && aalg->available)
2357 sz += sizeof(struct sadb_comb);
2358 }
2359 }
2360 return sz + sizeof(struct sadb_prop);
2361}
2362
2363static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2364{
2365 struct sadb_prop *p;
2366 int i;
2367
2368 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2369 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2370 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2371 p->sadb_prop_replay = 32;
2372 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2373
2374 for (i = 0; ; i++) {
2375 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2376 if (!aalg)
2377 break;
2378
2379 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2380 struct sadb_comb *c;
2381 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2382 memset(c, 0, sizeof(*c));
2383 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2384 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2385 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2386 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2387 c->sadb_comb_hard_addtime = 24*60*60;
2388 c->sadb_comb_soft_addtime = 20*60*60;
2389 c->sadb_comb_hard_usetime = 8*60*60;
2390 c->sadb_comb_soft_usetime = 7*60*60;
2391 }
2392 }
2393}
2394
2395static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2396{
2397 struct sadb_prop *p;
2398 int i, k;
2399
2400 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2401 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2402 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2403 p->sadb_prop_replay = 32;
2404 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2405
2406 for (i=0; ; i++) {
2407 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2408 if (!ealg)
2409 break;
2410
2411 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2412 continue;
2413
2414 for (k = 1; ; k++) {
2415 struct sadb_comb *c;
2416 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2417 if (!aalg)
2418 break;
2419 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2420 continue;
2421 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2422 memset(c, 0, sizeof(*c));
2423 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2424 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2425 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2426 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2427 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2428 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2429 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2430 c->sadb_comb_hard_addtime = 24*60*60;
2431 c->sadb_comb_soft_addtime = 20*60*60;
2432 c->sadb_comb_hard_usetime = 8*60*60;
2433 c->sadb_comb_soft_usetime = 7*60*60;
2434 }
2435 }
2436}
2437
26b15dad
JHS		 2438static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2439{
2440 return 0;
2441}
2442
2443static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2444{
2445 struct sk_buff *out_skb;
2446 struct sadb_msg *out_hdr;
26b15dad
JHS		 2447 int hard;
2448 int hsc;
2449
bf08867f 2450 hard = c->data.hard;
26b15dad
JHS		 2451 if (hard)
2452 hsc = 2;
2453 else
2454 hsc = 1;
1da177e4
LT		 2455
2456 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2457 if (IS_ERR(out_skb))
2458 return PTR_ERR(out_skb);
2459
2460 out_hdr = (struct sadb_msg *) out_skb->data;
2461 out_hdr->sadb_msg_version = PF_KEY_V2;
2462 out_hdr->sadb_msg_type = SADB_EXPIRE;
2463 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2464 out_hdr->sadb_msg_errno = 0;
2465 out_hdr->sadb_msg_reserved = 0;
2466 out_hdr->sadb_msg_seq = 0;
2467 out_hdr->sadb_msg_pid = 0;
2468
2469 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2470 return 0;
2471}
2472
26b15dad
JHS		 2473static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2474{
2475 switch (c->event) {
f60f6b8f 2476 case XFRM_MSG_EXPIRE:
26b15dad 2477 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 2478 case XFRM_MSG_DELSA:
2479 case XFRM_MSG_NEWSA:
2480 case XFRM_MSG_UPDSA:
26b15dad 2481 return key_notify_sa(x, c);
f60f6b8f 2482 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2483 return key_notify_sa_flush(c);
2484 default:
2485 printk("pfkey: Unknown SA event %d\n", c->event);
2486 break;
2487 }
2488
2489 return 0;
2490}
2491
2492static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2493{
2494 switch (c->event) {
f60f6b8f 2495 case XFRM_MSG_POLEXPIRE:
26b15dad 2496 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 2497 case XFRM_MSG_DELPOLICY:
2498 case XFRM_MSG_NEWPOLICY:
2499 case XFRM_MSG_UPDPOLICY:
26b15dad 2500 return key_notify_policy(xp, dir, c);
f60f6b8f 2501 case XFRM_MSG_FLUSHPOLICY:
26b15dad
JHS		 2502 return key_notify_policy_flush(c);
2503 default:
2504 printk("pfkey: Unknown policy event %d\n", c->event);
2505 break;
2506 }
2507
2508 return 0;
2509}
2510
1da177e4
LT		 2511static u32 get_acqseq(void)
2512{
2513 u32 res;
2514 static u32 acqseq;
2515 static DEFINE_SPINLOCK(acqseq_lock);
2516
2517 spin_lock_bh(&acqseq_lock);
2518 res = (++acqseq ? : ++acqseq);
2519 spin_unlock_bh(&acqseq_lock);
2520 return res;
2521}
2522
2523static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2524{
2525 struct sk_buff *skb;
2526 struct sadb_msg *hdr;
2527 struct sadb_address *addr;
2528 struct sadb_x_policy *pol;
2529 struct sockaddr_in *sin;
2530#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2531 struct sockaddr_in6 *sin6;
2532#endif
2533 int sockaddr_size;
2534 int size;
2535
2536 sockaddr_size = pfkey_sockaddr_size(x->props.family);
2537 if (!sockaddr_size)
2538 return -EINVAL;
2539
2540 size = sizeof(struct sadb_msg) +
2541 (sizeof(struct sadb_address) * 2) +
2542 (sockaddr_size * 2) +
2543 sizeof(struct sadb_x_policy);
2544
2545 if (x->id.proto == IPPROTO_AH)
2546 size += count_ah_combs(t);
2547 else if (x->id.proto == IPPROTO_ESP)
2548 size += count_esp_combs(t);
2549
2550 skb = alloc_skb(size + 16, GFP_ATOMIC);
2551 if (skb == NULL)
2552 return -ENOMEM;
2553
2554 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2555 hdr->sadb_msg_version = PF_KEY_V2;
2556 hdr->sadb_msg_type = SADB_ACQUIRE;
2557 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2558 hdr->sadb_msg_len = size / sizeof(uint64_t);
2559 hdr->sadb_msg_errno = 0;
2560 hdr->sadb_msg_reserved = 0;
2561 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2562 hdr->sadb_msg_pid = 0;
2563
2564 /* src address */
2565 addr = (struct sadb_address*) skb_put(skb,
2566 sizeof(struct sadb_address)+sockaddr_size);
2567 addr->sadb_address_len =
2568 (sizeof(struct sadb_address)+sockaddr_size)/
2569 sizeof(uint64_t);
2570 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2571 addr->sadb_address_proto = 0;
2572 addr->sadb_address_reserved = 0;
2573 if (x->props.family == AF_INET) {
2574 addr->sadb_address_prefixlen = 32;
2575
2576 sin = (struct sockaddr_in *) (addr + 1);
2577 sin->sin_family = AF_INET;
2578 sin->sin_addr.s_addr = x->props.saddr.a4;
2579 sin->sin_port = 0;
2580 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2581 }
2582#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2583 else if (x->props.family == AF_INET6) {
2584 addr->sadb_address_prefixlen = 128;
2585
2586 sin6 = (struct sockaddr_in6 *) (addr + 1);
2587 sin6->sin6_family = AF_INET6;
2588 sin6->sin6_port = 0;
2589 sin6->sin6_flowinfo = 0;
2590 memcpy(&sin6->sin6_addr,
2591 x->props.saddr.a6, sizeof(struct in6_addr));
2592 sin6->sin6_scope_id = 0;
2593 }
2594#endif
2595 else
2596 BUG();
2597
2598 /* dst address */
2599 addr = (struct sadb_address*) skb_put(skb,
2600 sizeof(struct sadb_address)+sockaddr_size);
2601 addr->sadb_address_len =
2602 (sizeof(struct sadb_address)+sockaddr_size)/
2603 sizeof(uint64_t);
2604 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2605 addr->sadb_address_proto = 0;
2606 addr->sadb_address_reserved = 0;
2607 if (x->props.family == AF_INET) {
2608 addr->sadb_address_prefixlen = 32;
2609
2610 sin = (struct sockaddr_in *) (addr + 1);
2611 sin->sin_family = AF_INET;
2612 sin->sin_addr.s_addr = x->id.daddr.a4;
2613 sin->sin_port = 0;
2614 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2615 }
2616#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2617 else if (x->props.family == AF_INET6) {
2618 addr->sadb_address_prefixlen = 128;
2619
2620 sin6 = (struct sockaddr_in6 *) (addr + 1);
2621 sin6->sin6_family = AF_INET6;
2622 sin6->sin6_port = 0;
2623 sin6->sin6_flowinfo = 0;
2624 memcpy(&sin6->sin6_addr,
2625 x->id.daddr.a6, sizeof(struct in6_addr));
2626 sin6->sin6_scope_id = 0;
2627 }
2628#endif
2629 else
2630 BUG();
2631
2632 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2633 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2634 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2635 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2636 pol->sadb_x_policy_dir = dir+1;
2637 pol->sadb_x_policy_id = xp->index;
2638
2639 /* Set sadb_comb's. */
2640 if (x->id.proto == IPPROTO_AH)
2641 dump_ah_combs(skb, t);
2642 else if (x->id.proto == IPPROTO_ESP)
2643 dump_esp_combs(skb, t);
2644
2645 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2646}
2647
2648static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
2649 u8 *data, int len, int *dir)
2650{
2651 struct xfrm_policy *xp;
2652 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
2653
2654 switch (family) {
2655 case AF_INET:
2656 if (opt != IP_IPSEC_POLICY) {
2657 *dir = -EOPNOTSUPP;
2658 return NULL;
2659 }
2660 break;
2661#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2662 case AF_INET6:
2663 if (opt != IPV6_IPSEC_POLICY) {
2664 *dir = -EOPNOTSUPP;
2665 return NULL;
2666 }
2667 break;
2668#endif
2669 default:
2670 *dir = -EINVAL;
2671 return NULL;
2672 }
2673
2674 *dir = -EINVAL;
2675
2676 if (len < sizeof(struct sadb_x_policy) ||
2677 pol->sadb_x_policy_len*8 > len ||
2678 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
2679 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
2680 return NULL;
2681
2682 xp = xfrm_policy_alloc(GFP_ATOMIC);
2683 if (xp == NULL) {
2684 *dir = -ENOBUFS;
2685 return NULL;
2686 }
2687
2688 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2689 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2690
2691 xp->lft.soft_byte_limit = XFRM_INF;
2692 xp->lft.hard_byte_limit = XFRM_INF;
2693 xp->lft.soft_packet_limit = XFRM_INF;
2694 xp->lft.hard_packet_limit = XFRM_INF;
2695 xp->family = family;
2696
2697 xp->xfrm_nr = 0;
2698 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2699 (*dir = parse_ipsecrequests(xp, pol)) < 0)
2700 goto out;
2701
2702 *dir = pol->sadb_x_policy_dir-1;
2703 return xp;
2704
2705out:
2706 kfree(xp);
2707 return NULL;
2708}
2709
2710static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
2711{
2712 struct sk_buff *skb;
2713 struct sadb_msg *hdr;
2714 struct sadb_sa *sa;
2715 struct sadb_address *addr;
2716 struct sadb_x_nat_t_port *n_port;
2717 struct sockaddr_in *sin;
2718#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2719 struct sockaddr_in6 *sin6;
2720#endif
2721 int sockaddr_size;
2722 int size;
2723 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
2724 struct xfrm_encap_tmpl *natt = NULL;
2725
2726 sockaddr_size = pfkey_sockaddr_size(x->props.family);
2727 if (!sockaddr_size)
2728 return -EINVAL;
2729
2730 if (!satype)
2731 return -EINVAL;
2732
2733 if (!x->encap)
2734 return -EINVAL;
2735
2736 natt = x->encap;
2737
2738 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
2739 *
2740 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
2741 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
2742 */
2743
2744 size = sizeof(struct sadb_msg) +
2745 sizeof(struct sadb_sa) +
2746 (sizeof(struct sadb_address) * 2) +
2747 (sockaddr_size * 2) +
2748 (sizeof(struct sadb_x_nat_t_port) * 2);
2749
2750 skb = alloc_skb(size + 16, GFP_ATOMIC);
2751 if (skb == NULL)
2752 return -ENOMEM;
2753
2754 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2755 hdr->sadb_msg_version = PF_KEY_V2;
2756 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
2757 hdr->sadb_msg_satype = satype;
2758 hdr->sadb_msg_len = size / sizeof(uint64_t);
2759 hdr->sadb_msg_errno = 0;
2760 hdr->sadb_msg_reserved = 0;
2761 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
2762 hdr->sadb_msg_pid = 0;
2763
2764 /* SA */
2765 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
2766 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
2767 sa->sadb_sa_exttype = SADB_EXT_SA;
2768 sa->sadb_sa_spi = x->id.spi;
2769 sa->sadb_sa_replay = 0;
2770 sa->sadb_sa_state = 0;
2771 sa->sadb_sa_auth = 0;
2772 sa->sadb_sa_encrypt = 0;
2773 sa->sadb_sa_flags = 0;
2774
2775 /* ADDRESS_SRC (old addr) */
2776 addr = (struct sadb_address*)
2777 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
2778 addr->sadb_address_len =
2779 (sizeof(struct sadb_address)+sockaddr_size)/
2780 sizeof(uint64_t);
2781 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2782 addr->sadb_address_proto = 0;
2783 addr->sadb_address_reserved = 0;
2784 if (x->props.family == AF_INET) {
2785 addr->sadb_address_prefixlen = 32;
2786
2787 sin = (struct sockaddr_in *) (addr + 1);
2788 sin->sin_family = AF_INET;
2789 sin->sin_addr.s_addr = x->props.saddr.a4;
2790 sin->sin_port = 0;
2791 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2792 }
2793#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2794 else if (x->props.family == AF_INET6) {
2795 addr->sadb_address_prefixlen = 128;
2796
2797 sin6 = (struct sockaddr_in6 *) (addr + 1);
2798 sin6->sin6_family = AF_INET6;
2799 sin6->sin6_port = 0;
2800 sin6->sin6_flowinfo = 0;
2801 memcpy(&sin6->sin6_addr,
2802 x->props.saddr.a6, sizeof(struct in6_addr));
2803 sin6->sin6_scope_id = 0;
2804 }
2805#endif
2806 else
2807 BUG();
2808
2809 /* NAT_T_SPORT (old port) */
2810 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
2811 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
2812 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
2813 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
2814 n_port->sadb_x_nat_t_port_reserved = 0;
2815
2816 /* ADDRESS_DST (new addr) */
2817 addr = (struct sadb_address*)
2818 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
2819 addr->sadb_address_len =
2820 (sizeof(struct sadb_address)+sockaddr_size)/
2821 sizeof(uint64_t);
2822 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2823 addr->sadb_address_proto = 0;
2824 addr->sadb_address_reserved = 0;
2825 if (x->props.family == AF_INET) {
2826 addr->sadb_address_prefixlen = 32;
2827
2828 sin = (struct sockaddr_in *) (addr + 1);
2829 sin->sin_family = AF_INET;
2830 sin->sin_addr.s_addr = ipaddr->a4;
2831 sin->sin_port = 0;
2832 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2833 }
2834#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2835 else if (x->props.family == AF_INET6) {
2836 addr->sadb_address_prefixlen = 128;
2837
2838 sin6 = (struct sockaddr_in6 *) (addr + 1);
2839 sin6->sin6_family = AF_INET6;
2840 sin6->sin6_port = 0;
2841 sin6->sin6_flowinfo = 0;
2842 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
2843 sin6->sin6_scope_id = 0;
2844 }
2845#endif
2846 else
2847 BUG();
2848
2849 /* NAT_T_DPORT (new port) */
2850 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
2851 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
2852 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
2853 n_port->sadb_x_nat_t_port_port = sport;
2854 n_port->sadb_x_nat_t_port_reserved = 0;
2855
2856 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2857}
2858
2859static int pfkey_sendmsg(struct kiocb *kiocb,
2860 struct socket *sock, struct msghdr *msg, size_t len)
2861{
2862 struct sock *sk = sock->sk;
2863 struct sk_buff *skb = NULL;
2864 struct sadb_msg *hdr = NULL;
2865 int err;
2866
2867 err = -EOPNOTSUPP;
2868 if (msg->msg_flags & MSG_OOB)
2869 goto out;
2870
2871 err = -EMSGSIZE;
2872 if ((unsigned)len > sk->sk_sndbuf - 32)
2873 goto out;
2874
2875 err = -ENOBUFS;
2876 skb = alloc_skb(len, GFP_KERNEL);
2877 if (skb == NULL)
2878 goto out;
2879
2880 err = -EFAULT;
2881 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
2882 goto out;
2883
2884 hdr = pfkey_get_base_msg(skb, &err);
2885 if (!hdr)
2886 goto out;
2887
2888 down(&xfrm_cfg_sem);
2889 err = pfkey_process(sk, skb, hdr);
2890 up(&xfrm_cfg_sem);
2891
2892out:
2893 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
2894 err = 0;
2895 if (skb)
2896 kfree_skb(skb);
2897
2898 return err ? : len;
2899}
2900
2901static int pfkey_recvmsg(struct kiocb *kiocb,
2902 struct socket *sock, struct msghdr *msg, size_t len,
2903 int flags)
2904{
2905 struct sock *sk = sock->sk;
2906 struct sk_buff *skb;
2907 int copied, err;
2908
2909 err = -EINVAL;
2910 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
2911 goto out;
2912
2913 msg->msg_namelen = 0;
2914 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
2915 if (skb == NULL)
2916 goto out;
2917
2918 copied = skb->len;
2919 if (copied > len) {
2920 msg->msg_flags |= MSG_TRUNC;
2921 copied = len;
2922 }
2923
2924 skb->h.raw = skb->data;
2925 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
2926 if (err)
2927 goto out_free;
2928
2929 sock_recv_timestamp(msg, sk, skb);
2930
2931 err = (flags & MSG_TRUNC) ? skb->len : copied;
2932
2933out_free:
2934 skb_free_datagram(sk, skb);
2935out:
2936 return err;
2937}
2938
2939static struct proto_ops pfkey_ops = {
2940 .family = PF_KEY,
2941 .owner = THIS_MODULE,
2942 /* Operations that make no sense on pfkey sockets. */
2943 .bind = sock_no_bind,
2944 .connect = sock_no_connect,
2945 .socketpair = sock_no_socketpair,
2946 .accept = sock_no_accept,
2947 .getname = sock_no_getname,
2948 .ioctl = sock_no_ioctl,
2949 .listen = sock_no_listen,
2950 .shutdown = sock_no_shutdown,
2951 .setsockopt = sock_no_setsockopt,
2952 .getsockopt = sock_no_getsockopt,
2953 .mmap = sock_no_mmap,
2954 .sendpage = sock_no_sendpage,
2955
2956 /* Now the operations that really occur. */
2957 .release = pfkey_release,
2958 .poll = datagram_poll,
2959 .sendmsg = pfkey_sendmsg,
2960 .recvmsg = pfkey_recvmsg,
2961};
2962
2963static struct net_proto_family pfkey_family_ops = {
2964 .family = PF_KEY,
2965 .create = pfkey_create,
2966 .owner = THIS_MODULE,
2967};
2968
2969#ifdef CONFIG_PROC_FS
2970static int pfkey_read_proc(char *buffer, char **start, off_t offset,
2971 int length, int *eof, void *data)
2972{
2973 off_t pos = 0;
2974 off_t begin = 0;
2975 int len = 0;
2976 struct sock *s;
2977 struct hlist_node *node;
2978
2979 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
2980
2981 read_lock(&pfkey_table_lock);
2982
2983 sk_for_each(s, node, &pfkey_table) {
2984 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
2985 s,
2986 atomic_read(&s->sk_refcnt),
2987 atomic_read(&s->sk_rmem_alloc),
2988 atomic_read(&s->sk_wmem_alloc),
2989 sock_i_uid(s),
2990 sock_i_ino(s)
2991 );
2992
2993 buffer[len++] = '\n';
2994
2995 pos = begin + len;
2996 if (pos < offset) {
2997 len = 0;
2998 begin = pos;
2999 }
3000 if(pos > offset + length)
3001 goto done;
3002 }
3003 *eof = 1;
3004
3005done:
3006 read_unlock(&pfkey_table_lock);
3007
3008 *start = buffer + (offset - begin);
3009 len -= (offset - begin);
3010
3011 if (len > length)
3012 len = length;
3013 if (len < 0)
3014 len = 0;
3015
3016 return len;
3017}
3018#endif
3019
3020static struct xfrm_mgr pfkeyv2_mgr =
3021{
3022 .id = "pfkeyv2",
3023 .notify = pfkey_send_notify,
3024 .acquire = pfkey_send_acquire,
3025 .compile_policy = pfkey_compile_policy,
3026 .new_mapping = pfkey_send_new_mapping,
26b15dad 3027 .notify_policy = pfkey_send_policy_notify,
1da177e4
LT		 3028};
3029
3030static void __exit ipsec_pfkey_exit(void)
3031{
3032 xfrm_unregister_km(&pfkeyv2_mgr);
3033 remove_proc_entry("net/pfkey", NULL);
3034 sock_unregister(PF_KEY);
3035 proto_unregister(&key_proto);
3036}
3037
3038static int __init ipsec_pfkey_init(void)
3039{
3040 int err = proto_register(&key_proto, 0);
3041
3042 if (err != 0)
3043 goto out;
3044
3045 err = sock_register(&pfkey_family_ops);
3046 if (err != 0)
3047 goto out_unregister_key_proto;
3048#ifdef CONFIG_PROC_FS
3049 err = -ENOMEM;
3050 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3051 goto out_sock_unregister;
3052#endif
3053 err = xfrm_register_km(&pfkeyv2_mgr);
3054 if (err != 0)
3055 goto out_remove_proc_entry;
3056out:
3057 return err;
3058out_remove_proc_entry:
3059#ifdef CONFIG_PROC_FS
3060 remove_proc_entry("net/pfkey", NULL);
3061out_sock_unregister:
3062#endif
3063 sock_unregister(PF_KEY);
3064out_unregister_key_proto:
3065 proto_unregister(&key_proto);
3066 goto out;
3067}
3068
3069module_init(ipsec_pfkey_init);
3070module_exit(ipsec_pfkey_exit);
3071MODULE_LICENSE("GPL");
3072MODULE_ALIAS_NETPROTO(PF_KEY);
Linux kernel - Deliverables
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