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Linux 2.6.25-rc4
[linux-2.6/next.git] / net / key / af_key.c
blob8b5f486ac80f298fe6034a2a8b576c3c2ad9ea83
1 /*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/in.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <net/net_namespace.h>
30 #include <net/xfrm.h>
31
32 #include <net/sock.h>
33
34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
36
37
38 /* List of all pfkey sockets. */
39 static HLIST_HEAD(pfkey_table);
40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41 static DEFINE_RWLOCK(pfkey_table_lock);
42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43
44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
45
46 struct pfkey_sock {
47 /* struct sock must be the first member of struct pfkey_sock */
48 struct sock sk;
49 int registered;
50 int promisc;
51 };
52
53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54 {
55 return (struct pfkey_sock *)sk;
56 }
57
58 static void pfkey_sock_destruct(struct sock *sk)
59 {
60 skb_queue_purge(&sk->sk_receive_queue);
61
62 if (!sock_flag(sk, SOCK_DEAD)) {
63 printk("Attempt to release alive pfkey socket: %p\n", sk);
64 return;
65 }
66
67 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69
70 atomic_dec(&pfkey_socks_nr);
71 }
72
73 static void pfkey_table_grab(void)
74 {
75 write_lock_bh(&pfkey_table_lock);
76
77 if (atomic_read(&pfkey_table_users)) {
78 DECLARE_WAITQUEUE(wait, current);
79
80 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81 for(;;) {
82 set_current_state(TASK_UNINTERRUPTIBLE);
83 if (atomic_read(&pfkey_table_users) == 0)
84 break;
85 write_unlock_bh(&pfkey_table_lock);
86 schedule();
87 write_lock_bh(&pfkey_table_lock);
88 }
89
90 __set_current_state(TASK_RUNNING);
91 remove_wait_queue(&pfkey_table_wait, &wait);
92 }
93 }
94
95 static __inline__ void pfkey_table_ungrab(void)
96 {
97 write_unlock_bh(&pfkey_table_lock);
98 wake_up(&pfkey_table_wait);
99 }
100
101 static __inline__ void pfkey_lock_table(void)
102 {
103 /* read_lock() synchronizes us to pfkey_table_grab */
104
105 read_lock(&pfkey_table_lock);
106 atomic_inc(&pfkey_table_users);
107 read_unlock(&pfkey_table_lock);
108 }
109
110 static __inline__ void pfkey_unlock_table(void)
111 {
112 if (atomic_dec_and_test(&pfkey_table_users))
113 wake_up(&pfkey_table_wait);
114 }
115
116
117 static const struct proto_ops pfkey_ops;
118
119 static void pfkey_insert(struct sock *sk)
120 {
121 pfkey_table_grab();
122 sk_add_node(sk, &pfkey_table);
123 pfkey_table_ungrab();
124 }
125
126 static void pfkey_remove(struct sock *sk)
127 {
128 pfkey_table_grab();
129 sk_del_node_init(sk);
130 pfkey_table_ungrab();
131 }
132
133 static struct proto key_proto = {
134 .name = "KEY",
135 .owner = THIS_MODULE,
136 .obj_size = sizeof(struct pfkey_sock),
137 };
138
139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
140 {
141 struct sock *sk;
142 int err;
143
144 if (net != &init_net)
145 return -EAFNOSUPPORT;
146
147 if (!capable(CAP_NET_ADMIN))
148 return -EPERM;
149 if (sock->type != SOCK_RAW)
150 return -ESOCKTNOSUPPORT;
151 if (protocol != PF_KEY_V2)
152 return -EPROTONOSUPPORT;
153
154 err = -ENOMEM;
155 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
156 if (sk == NULL)
157 goto out;
158
159 sock->ops = &pfkey_ops;
160 sock_init_data(sock, sk);
161
162 sk->sk_family = PF_KEY;
163 sk->sk_destruct = pfkey_sock_destruct;
164
165 atomic_inc(&pfkey_socks_nr);
166
167 pfkey_insert(sk);
168
169 return 0;
170 out:
171 return err;
172 }
173
174 static int pfkey_release(struct socket *sock)
175 {
176 struct sock *sk = sock->sk;
177
178 if (!sk)
179 return 0;
180
181 pfkey_remove(sk);
182
183 sock_orphan(sk);
184 sock->sk = NULL;
185 skb_queue_purge(&sk->sk_write_queue);
186 sock_put(sk);
187
188 return 0;
189 }
190
191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
192 gfp_t allocation, struct sock *sk)
193 {
194 int err = -ENOBUFS;
195
196 sock_hold(sk);
197 if (*skb2 == NULL) {
198 if (atomic_read(&skb->users) != 1) {
199 *skb2 = skb_clone(skb, allocation);
200 } else {
201 *skb2 = skb;
202 atomic_inc(&skb->users);
203 }
204 }
205 if (*skb2 != NULL) {
206 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
207 skb_orphan(*skb2);
208 skb_set_owner_r(*skb2, sk);
209 skb_queue_tail(&sk->sk_receive_queue, *skb2);
210 sk->sk_data_ready(sk, (*skb2)->len);
211 *skb2 = NULL;
212 err = 0;
213 }
214 }
215 sock_put(sk);
216 return err;
217 }
218
219 /* Send SKB to all pfkey sockets matching selected criteria. */
220 #define BROADCAST_ALL 0
221 #define BROADCAST_ONE 1
222 #define BROADCAST_REGISTERED 2
223 #define BROADCAST_PROMISC_ONLY 4
224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
225 int broadcast_flags, struct sock *one_sk)
226 {
227 struct sock *sk;
228 struct hlist_node *node;
229 struct sk_buff *skb2 = NULL;
230 int err = -ESRCH;
231
232 /* XXX Do we need something like netlink_overrun? I think
233 * XXX PF_KEY socket apps will not mind current behavior.
234 */
235 if (!skb)
236 return -ENOMEM;
237
238 pfkey_lock_table();
239 sk_for_each(sk, node, &pfkey_table) {
240 struct pfkey_sock *pfk = pfkey_sk(sk);
241 int err2;
242
243 /* Yes, it means that if you are meant to receive this
244 * pfkey message you receive it twice as promiscuous
245 * socket.
246 */
247 if (pfk->promisc)
248 pfkey_broadcast_one(skb, &skb2, allocation, sk);
249
250 /* the exact target will be processed later */
251 if (sk == one_sk)
252 continue;
253 if (broadcast_flags != BROADCAST_ALL) {
254 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
255 continue;
256 if ((broadcast_flags & BROADCAST_REGISTERED) &&
257 !pfk->registered)
258 continue;
259 if (broadcast_flags & BROADCAST_ONE)
260 continue;
261 }
262
263 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
264
265 /* Error is cleare after succecful sending to at least one
266 * registered KM */
267 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
268 err = err2;
269 }
270 pfkey_unlock_table();
271
272 if (one_sk != NULL)
273 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
274
275 if (skb2)
276 kfree_skb(skb2);
277 kfree_skb(skb);
278 return err;
279 }
280
281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
282 {
283 *new = *orig;
284 }
285
286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
287 {
288 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
289 struct sadb_msg *hdr;
290
291 if (!skb)
292 return -ENOBUFS;
293
294 /* Woe be to the platform trying to support PFKEY yet
295 * having normal errnos outside the 1-255 range, inclusive.
296 */
297 err = -err;
298 if (err == ERESTARTSYS ||
299 err == ERESTARTNOHAND ||
300 err == ERESTARTNOINTR)
301 err = EINTR;
302 if (err >= 512)
303 err = EINVAL;
304 BUG_ON(err <= 0 || err >= 256);
305
306 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
307 pfkey_hdr_dup(hdr, orig);
308 hdr->sadb_msg_errno = (uint8_t) err;
309 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
310 sizeof(uint64_t));
311
312 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
313
314 return 0;
315 }
316
317 static u8 sadb_ext_min_len[] = {
318 [SADB_EXT_RESERVED] = (u8) 0,
319 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
320 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
321 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
322 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
323 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
324 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
325 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
326 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
327 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
328 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
329 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
330 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
331 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
332 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
333 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
334 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
335 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
336 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
337 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
338 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
339 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
340 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
341 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
342 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
343 };
344
345 /* Verify sadb_address_{len,prefixlen} against sa_family. */
346 static int verify_address_len(void *p)
347 {
348 struct sadb_address *sp = p;
349 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
350 struct sockaddr_in *sin;
351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
352 struct sockaddr_in6 *sin6;
353 #endif
354 int len;
355
356 switch (addr->sa_family) {
357 case AF_INET:
358 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
359 if (sp->sadb_address_len != len ||
360 sp->sadb_address_prefixlen > 32)
361 return -EINVAL;
362 break;
363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
364 case AF_INET6:
365 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
366 if (sp->sadb_address_len != len ||
367 sp->sadb_address_prefixlen > 128)
368 return -EINVAL;
369 break;
370 #endif
371 default:
372 /* It is user using kernel to keep track of security
373 * associations for another protocol, such as
374 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
375 * lengths.
376 *
377 * XXX Actually, association/policy database is not yet
378 * XXX able to cope with arbitrary sockaddr families.
379 * XXX When it can, remove this -EINVAL. -DaveM
380 */
381 return -EINVAL;
382 break;
383 }
384
385 return 0;
386 }
387
388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
389 {
390 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
391 sec_ctx->sadb_x_ctx_len,
392 sizeof(uint64_t));
393 }
394
395 static inline int verify_sec_ctx_len(void *p)
396 {
397 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
398 int len = sec_ctx->sadb_x_ctx_len;
399
400 if (len > PAGE_SIZE)
401 return -EINVAL;
402
403 len = pfkey_sec_ctx_len(sec_ctx);
404
405 if (sec_ctx->sadb_x_sec_len != len)
406 return -EINVAL;
407
408 return 0;
409 }
410
411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
412 {
413 struct xfrm_user_sec_ctx *uctx = NULL;
414 int ctx_size = sec_ctx->sadb_x_ctx_len;
415
416 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
417
418 if (!uctx)
419 return NULL;
420
421 uctx->len = pfkey_sec_ctx_len(sec_ctx);
422 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
423 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
424 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
425 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
426 memcpy(uctx + 1, sec_ctx + 1,
427 uctx->ctx_len);
428
429 return uctx;
430 }
431
432 static int present_and_same_family(struct sadb_address *src,
433 struct sadb_address *dst)
434 {
435 struct sockaddr *s_addr, *d_addr;
436
437 if (!src || !dst)
438 return 0;
439
440 s_addr = (struct sockaddr *)(src + 1);
441 d_addr = (struct sockaddr *)(dst + 1);
442 if (s_addr->sa_family != d_addr->sa_family)
443 return 0;
444 if (s_addr->sa_family != AF_INET
445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
446 && s_addr->sa_family != AF_INET6
447 #endif
448 )
449 return 0;
450
451 return 1;
452 }
453
454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
455 {
456 char *p = (char *) hdr;
457 int len = skb->len;
458
459 len -= sizeof(*hdr);
460 p += sizeof(*hdr);
461 while (len > 0) {
462 struct sadb_ext *ehdr = (struct sadb_ext *) p;
463 uint16_t ext_type;
464 int ext_len;
465
466 ext_len = ehdr->sadb_ext_len;
467 ext_len *= sizeof(uint64_t);
468 ext_type = ehdr->sadb_ext_type;
469 if (ext_len < sizeof(uint64_t) ||
470 ext_len > len ||
471 ext_type == SADB_EXT_RESERVED)
472 return -EINVAL;
473
474 if (ext_type <= SADB_EXT_MAX) {
475 int min = (int) sadb_ext_min_len[ext_type];
476 if (ext_len < min)
477 return -EINVAL;
478 if (ext_hdrs[ext_type-1] != NULL)
479 return -EINVAL;
480 if (ext_type == SADB_EXT_ADDRESS_SRC ||
481 ext_type == SADB_EXT_ADDRESS_DST ||
482 ext_type == SADB_EXT_ADDRESS_PROXY ||
483 ext_type == SADB_X_EXT_NAT_T_OA) {
484 if (verify_address_len(p))
485 return -EINVAL;
486 }
487 if (ext_type == SADB_X_EXT_SEC_CTX) {
488 if (verify_sec_ctx_len(p))
489 return -EINVAL;
490 }
491 ext_hdrs[ext_type-1] = p;
492 }
493 p += ext_len;
494 len -= ext_len;
495 }
496
497 return 0;
498 }
499
500 static uint16_t
501 pfkey_satype2proto(uint8_t satype)
502 {
503 switch (satype) {
504 case SADB_SATYPE_UNSPEC:
505 return IPSEC_PROTO_ANY;
506 case SADB_SATYPE_AH:
507 return IPPROTO_AH;
508 case SADB_SATYPE_ESP:
509 return IPPROTO_ESP;
510 case SADB_X_SATYPE_IPCOMP:
511 return IPPROTO_COMP;
512 break;
513 default:
514 return 0;
515 }
516 /* NOTREACHED */
517 }
518
519 static uint8_t
520 pfkey_proto2satype(uint16_t proto)
521 {
522 switch (proto) {
523 case IPPROTO_AH:
524 return SADB_SATYPE_AH;
525 case IPPROTO_ESP:
526 return SADB_SATYPE_ESP;
527 case IPPROTO_COMP:
528 return SADB_X_SATYPE_IPCOMP;
529 break;
530 default:
531 return 0;
532 }
533 /* NOTREACHED */
534 }
535
536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
537 * say specifically 'just raw sockets' as we encode them as 255.
538 */
539
540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
541 {
542 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
543 }
544
545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
546 {
547 return (proto ? proto : IPSEC_PROTO_ANY);
548 }
549
550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
551 xfrm_address_t *xaddr)
552 {
553 switch (((struct sockaddr*)(addr + 1))->sa_family) {
554 case AF_INET:
555 xaddr->a4 =
556 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
557 return AF_INET;
558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
559 case AF_INET6:
560 memcpy(xaddr->a6,
561 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
562 sizeof(struct in6_addr));
563 return AF_INET6;
564 #endif
565 default:
566 return 0;
567 }
568 /* NOTREACHED */
569 }
570
571 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
572 {
573 struct sadb_sa *sa;
574 struct sadb_address *addr;
575 uint16_t proto;
576 unsigned short family;
577 xfrm_address_t *xaddr;
578
579 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
580 if (sa == NULL)
581 return NULL;
582
583 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
584 if (proto == 0)
585 return NULL;
586
587 /* sadb_address_len should be checked by caller */
588 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
589 if (addr == NULL)
590 return NULL;
591
592 family = ((struct sockaddr *)(addr + 1))->sa_family;
593 switch (family) {
594 case AF_INET:
595 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
596 break;
597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
598 case AF_INET6:
599 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
600 break;
601 #endif
602 default:
603 xaddr = NULL;
604 }
605
606 if (!xaddr)
607 return NULL;
608
609 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
610 }
611
612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
613 static int
614 pfkey_sockaddr_size(sa_family_t family)
615 {
616 switch (family) {
617 case AF_INET:
618 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
620 case AF_INET6:
621 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
622 #endif
623 default:
624 return 0;
625 }
626 /* NOTREACHED */
627 }
628
629 static inline int pfkey_mode_from_xfrm(int mode)
630 {
631 switch(mode) {
632 case XFRM_MODE_TRANSPORT:
633 return IPSEC_MODE_TRANSPORT;
634 case XFRM_MODE_TUNNEL:
635 return IPSEC_MODE_TUNNEL;
636 case XFRM_MODE_BEET:
637 return IPSEC_MODE_BEET;
638 default:
639 return -1;
640 }
641 }
642
643 static inline int pfkey_mode_to_xfrm(int mode)
644 {
645 switch(mode) {
646 case IPSEC_MODE_ANY: /*XXX*/
647 case IPSEC_MODE_TRANSPORT:
648 return XFRM_MODE_TRANSPORT;
649 case IPSEC_MODE_TUNNEL:
650 return XFRM_MODE_TUNNEL;
651 case IPSEC_MODE_BEET:
652 return XFRM_MODE_BEET;
653 default:
654 return -1;
655 }
656 }
657
658 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
659 int add_keys, int hsc)
660 {
661 struct sk_buff *skb;
662 struct sadb_msg *hdr;
663 struct sadb_sa *sa;
664 struct sadb_lifetime *lifetime;
665 struct sadb_address *addr;
666 struct sadb_key *key;
667 struct sadb_x_sa2 *sa2;
668 struct sockaddr_in *sin;
669 struct sadb_x_sec_ctx *sec_ctx;
670 struct xfrm_sec_ctx *xfrm_ctx;
671 int ctx_size = 0;
672 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
673 struct sockaddr_in6 *sin6;
674 #endif
675 int size;
676 int auth_key_size = 0;
677 int encrypt_key_size = 0;
678 int sockaddr_size;
679 struct xfrm_encap_tmpl *natt = NULL;
680 int mode;
681
682 /* address family check */
683 sockaddr_size = pfkey_sockaddr_size(x->props.family);
684 if (!sockaddr_size)
685 return ERR_PTR(-EINVAL);
686
687 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
688 key(AE), (identity(SD),) (sensitivity)> */
689 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
690 sizeof(struct sadb_lifetime) +
691 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
692 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
693 sizeof(struct sadb_address)*2 +
694 sockaddr_size*2 +
695 sizeof(struct sadb_x_sa2);
696
697 if ((xfrm_ctx = x->security)) {
698 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
699 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
700 }
701
702 /* identity & sensitivity */
703
704 if ((x->props.family == AF_INET &&
705 x->sel.saddr.a4 != x->props.saddr.a4)
706 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
707 || (x->props.family == AF_INET6 &&
708 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
709 #endif
710 )
711 size += sizeof(struct sadb_address) + sockaddr_size;
712
713 if (add_keys) {
714 if (x->aalg && x->aalg->alg_key_len) {
715 auth_key_size =
716 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
717 size += sizeof(struct sadb_key) + auth_key_size;
718 }
719 if (x->ealg && x->ealg->alg_key_len) {
720 encrypt_key_size =
721 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
722 size += sizeof(struct sadb_key) + encrypt_key_size;
723 }
724 }
725 if (x->encap)
726 natt = x->encap;
727
728 if (natt && natt->encap_type) {
729 size += sizeof(struct sadb_x_nat_t_type);
730 size += sizeof(struct sadb_x_nat_t_port);
731 size += sizeof(struct sadb_x_nat_t_port);
732 }
733
734 skb = alloc_skb(size + 16, GFP_ATOMIC);
735 if (skb == NULL)
736 return ERR_PTR(-ENOBUFS);
737
738 /* call should fill header later */
739 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
740 memset(hdr, 0, size); /* XXX do we need this ? */
741 hdr->sadb_msg_len = size / sizeof(uint64_t);
742
743 /* sa */
744 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
745 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
746 sa->sadb_sa_exttype = SADB_EXT_SA;
747 sa->sadb_sa_spi = x->id.spi;
748 sa->sadb_sa_replay = x->props.replay_window;
749 switch (x->km.state) {
750 case XFRM_STATE_VALID:
751 sa->sadb_sa_state = x->km.dying ?
752 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
753 break;
754 case XFRM_STATE_ACQ:
755 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
756 break;
757 default:
758 sa->sadb_sa_state = SADB_SASTATE_DEAD;
759 break;
760 }
761 sa->sadb_sa_auth = 0;
762 if (x->aalg) {
763 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
764 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
765 }
766 sa->sadb_sa_encrypt = 0;
767 BUG_ON(x->ealg && x->calg);
768 if (x->ealg) {
769 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
770 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
771 }
772 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
773 if (x->calg) {
774 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
775 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
776 }
777
778 sa->sadb_sa_flags = 0;
779 if (x->props.flags & XFRM_STATE_NOECN)
780 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
781 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
782 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
783 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
784 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
785
786 /* hard time */
787 if (hsc & 2) {
788 lifetime = (struct sadb_lifetime *) skb_put(skb,
789 sizeof(struct sadb_lifetime));
790 lifetime->sadb_lifetime_len =
791 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
792 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
793 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
794 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
795 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
796 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
797 }
798 /* soft time */
799 if (hsc & 1) {
800 lifetime = (struct sadb_lifetime *) skb_put(skb,
801 sizeof(struct sadb_lifetime));
802 lifetime->sadb_lifetime_len =
803 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
804 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
805 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
806 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
807 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
808 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
809 }
810 /* current time */
811 lifetime = (struct sadb_lifetime *) skb_put(skb,
812 sizeof(struct sadb_lifetime));
813 lifetime->sadb_lifetime_len =
814 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
815 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
816 lifetime->sadb_lifetime_allocations = x->curlft.packets;
817 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
818 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
819 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
820 /* src address */
821 addr = (struct sadb_address*) skb_put(skb,
822 sizeof(struct sadb_address)+sockaddr_size);
823 addr->sadb_address_len =
824 (sizeof(struct sadb_address)+sockaddr_size)/
825 sizeof(uint64_t);
826 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
827 /* "if the ports are non-zero, then the sadb_address_proto field,
828 normally zero, MUST be filled in with the transport
829 protocol's number." - RFC2367 */
830 addr->sadb_address_proto = 0;
831 addr->sadb_address_reserved = 0;
832 if (x->props.family == AF_INET) {
833 addr->sadb_address_prefixlen = 32;
834
835 sin = (struct sockaddr_in *) (addr + 1);
836 sin->sin_family = AF_INET;
837 sin->sin_addr.s_addr = x->props.saddr.a4;
838 sin->sin_port = 0;
839 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
840 }
841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
842 else if (x->props.family == AF_INET6) {
843 addr->sadb_address_prefixlen = 128;
844
845 sin6 = (struct sockaddr_in6 *) (addr + 1);
846 sin6->sin6_family = AF_INET6;
847 sin6->sin6_port = 0;
848 sin6->sin6_flowinfo = 0;
849 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
850 sizeof(struct in6_addr));
851 sin6->sin6_scope_id = 0;
852 }
853 #endif
854 else
855 BUG();
856
857 /* dst address */
858 addr = (struct sadb_address*) skb_put(skb,
859 sizeof(struct sadb_address)+sockaddr_size);
860 addr->sadb_address_len =
861 (sizeof(struct sadb_address)+sockaddr_size)/
862 sizeof(uint64_t);
863 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
864 addr->sadb_address_proto = 0;
865 addr->sadb_address_prefixlen = 32; /* XXX */
866 addr->sadb_address_reserved = 0;
867 if (x->props.family == AF_INET) {
868 sin = (struct sockaddr_in *) (addr + 1);
869 sin->sin_family = AF_INET;
870 sin->sin_addr.s_addr = x->id.daddr.a4;
871 sin->sin_port = 0;
872 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
873
874 if (x->sel.saddr.a4 != x->props.saddr.a4) {
875 addr = (struct sadb_address*) skb_put(skb,
876 sizeof(struct sadb_address)+sockaddr_size);
877 addr->sadb_address_len =
878 (sizeof(struct sadb_address)+sockaddr_size)/
879 sizeof(uint64_t);
880 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
881 addr->sadb_address_proto =
882 pfkey_proto_from_xfrm(x->sel.proto);
883 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
884 addr->sadb_address_reserved = 0;
885
886 sin = (struct sockaddr_in *) (addr + 1);
887 sin->sin_family = AF_INET;
888 sin->sin_addr.s_addr = x->sel.saddr.a4;
889 sin->sin_port = x->sel.sport;
890 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
891 }
892 }
893 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
894 else if (x->props.family == AF_INET6) {
895 addr->sadb_address_prefixlen = 128;
896
897 sin6 = (struct sockaddr_in6 *) (addr + 1);
898 sin6->sin6_family = AF_INET6;
899 sin6->sin6_port = 0;
900 sin6->sin6_flowinfo = 0;
901 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
902 sin6->sin6_scope_id = 0;
903
904 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
905 sizeof(struct in6_addr))) {
906 addr = (struct sadb_address *) skb_put(skb,
907 sizeof(struct sadb_address)+sockaddr_size);
908 addr->sadb_address_len =
909 (sizeof(struct sadb_address)+sockaddr_size)/
910 sizeof(uint64_t);
911 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
912 addr->sadb_address_proto =
913 pfkey_proto_from_xfrm(x->sel.proto);
914 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
915 addr->sadb_address_reserved = 0;
916
917 sin6 = (struct sockaddr_in6 *) (addr + 1);
918 sin6->sin6_family = AF_INET6;
919 sin6->sin6_port = x->sel.sport;
920 sin6->sin6_flowinfo = 0;
921 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
922 sizeof(struct in6_addr));
923 sin6->sin6_scope_id = 0;
924 }
925 }
926 #endif
927 else
928 BUG();
929
930 /* auth key */
931 if (add_keys && auth_key_size) {
932 key = (struct sadb_key *) skb_put(skb,
933 sizeof(struct sadb_key)+auth_key_size);
934 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
935 sizeof(uint64_t);
936 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
937 key->sadb_key_bits = x->aalg->alg_key_len;
938 key->sadb_key_reserved = 0;
939 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
940 }
941 /* encrypt key */
942 if (add_keys && encrypt_key_size) {
943 key = (struct sadb_key *) skb_put(skb,
944 sizeof(struct sadb_key)+encrypt_key_size);
945 key->sadb_key_len = (sizeof(struct sadb_key) +
946 encrypt_key_size) / sizeof(uint64_t);
947 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
948 key->sadb_key_bits = x->ealg->alg_key_len;
949 key->sadb_key_reserved = 0;
950 memcpy(key + 1, x->ealg->alg_key,
951 (x->ealg->alg_key_len+7)/8);
952 }
953
954 /* sa */
955 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
956 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
957 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
958 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
959 kfree_skb(skb);
960 return ERR_PTR(-EINVAL);
961 }
962 sa2->sadb_x_sa2_mode = mode;
963 sa2->sadb_x_sa2_reserved1 = 0;
964 sa2->sadb_x_sa2_reserved2 = 0;
965 sa2->sadb_x_sa2_sequence = 0;
966 sa2->sadb_x_sa2_reqid = x->props.reqid;
967
968 if (natt && natt->encap_type) {
969 struct sadb_x_nat_t_type *n_type;
970 struct sadb_x_nat_t_port *n_port;
971
972 /* type */
973 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
974 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
975 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
976 n_type->sadb_x_nat_t_type_type = natt->encap_type;
977 n_type->sadb_x_nat_t_type_reserved[0] = 0;
978 n_type->sadb_x_nat_t_type_reserved[1] = 0;
979 n_type->sadb_x_nat_t_type_reserved[2] = 0;
980
981 /* source port */
982 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
983 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
984 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
985 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
986 n_port->sadb_x_nat_t_port_reserved = 0;
987
988 /* dest port */
989 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
990 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
991 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
992 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
993 n_port->sadb_x_nat_t_port_reserved = 0;
994 }
995
996 /* security context */
997 if (xfrm_ctx) {
998 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
999 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000 sec_ctx->sadb_x_sec_len =
1001 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007 xfrm_ctx->ctx_len);
1008 }
1009
1010 return skb;
1011 }
1012
1013
1014 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1015 {
1016 struct sk_buff *skb;
1017
1018 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1019
1020 return skb;
1021 }
1022
1023 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1024 int hsc)
1025 {
1026 return __pfkey_xfrm_state2msg(x, 0, hsc);
1027 }
1028
1029 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1030 void **ext_hdrs)
1031 {
1032 struct xfrm_state *x;
1033 struct sadb_lifetime *lifetime;
1034 struct sadb_sa *sa;
1035 struct sadb_key *key;
1036 struct sadb_x_sec_ctx *sec_ctx;
1037 uint16_t proto;
1038 int err;
1039
1040
1041 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1042 if (!sa ||
1043 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1044 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1045 return ERR_PTR(-EINVAL);
1046 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1047 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1048 return ERR_PTR(-EINVAL);
1049 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1050 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1051 return ERR_PTR(-EINVAL);
1052 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1053 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1054 return ERR_PTR(-EINVAL);
1055
1056 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1057 if (proto == 0)
1058 return ERR_PTR(-EINVAL);
1059
1060 /* default error is no buffer space */
1061 err = -ENOBUFS;
1062
1063 /* RFC2367:
1064
1065 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1066 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1067 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1068 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1069 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1070 not true.
1071
1072 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1073 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1074 */
1075 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1076 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1077 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1078 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1079 return ERR_PTR(-EINVAL);
1080 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1081 if (key != NULL &&
1082 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1083 ((key->sadb_key_bits+7) / 8 == 0 ||
1084 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1085 return ERR_PTR(-EINVAL);
1086 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1087 if (key != NULL &&
1088 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1089 ((key->sadb_key_bits+7) / 8 == 0 ||
1090 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1091 return ERR_PTR(-EINVAL);
1092
1093 x = xfrm_state_alloc();
1094 if (x == NULL)
1095 return ERR_PTR(-ENOBUFS);
1096
1097 x->id.proto = proto;
1098 x->id.spi = sa->sadb_sa_spi;
1099 x->props.replay_window = sa->sadb_sa_replay;
1100 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1101 x->props.flags |= XFRM_STATE_NOECN;
1102 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1103 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1104 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1105 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1106
1107 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1108 if (lifetime != NULL) {
1109 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1110 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1111 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1112 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1113 }
1114 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1115 if (lifetime != NULL) {
1116 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1117 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1118 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1119 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1120 }
1121
1122 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1123 if (sec_ctx != NULL) {
1124 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1125
1126 if (!uctx)
1127 goto out;
1128
1129 err = security_xfrm_state_alloc(x, uctx);
1130 kfree(uctx);
1131
1132 if (err)
1133 goto out;
1134 }
1135
1136 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1137 if (sa->sadb_sa_auth) {
1138 int keysize = 0;
1139 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1140 if (!a) {
1141 err = -ENOSYS;
1142 goto out;
1143 }
1144 if (key)
1145 keysize = (key->sadb_key_bits + 7) / 8;
1146 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1147 if (!x->aalg)
1148 goto out;
1149 strcpy(x->aalg->alg_name, a->name);
1150 x->aalg->alg_key_len = 0;
1151 if (key) {
1152 x->aalg->alg_key_len = key->sadb_key_bits;
1153 memcpy(x->aalg->alg_key, key+1, keysize);
1154 }
1155 x->props.aalgo = sa->sadb_sa_auth;
1156 /* x->algo.flags = sa->sadb_sa_flags; */
1157 }
1158 if (sa->sadb_sa_encrypt) {
1159 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161 if (!a) {
1162 err = -ENOSYS;
1163 goto out;
1164 }
1165 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166 if (!x->calg)
1167 goto out;
1168 strcpy(x->calg->alg_name, a->name);
1169 x->props.calgo = sa->sadb_sa_encrypt;
1170 } else {
1171 int keysize = 0;
1172 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173 if (!a) {
1174 err = -ENOSYS;
1175 goto out;
1176 }
1177 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178 if (key)
1179 keysize = (key->sadb_key_bits + 7) / 8;
1180 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181 if (!x->ealg)
1182 goto out;
1183 strcpy(x->ealg->alg_name, a->name);
1184 x->ealg->alg_key_len = 0;
1185 if (key) {
1186 x->ealg->alg_key_len = key->sadb_key_bits;
1187 memcpy(x->ealg->alg_key, key+1, keysize);
1188 }
1189 x->props.ealgo = sa->sadb_sa_encrypt;
1190 }
1191 }
1192 /* x->algo.flags = sa->sadb_sa_flags; */
1193
1194 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1195 &x->props.saddr);
1196 if (!x->props.family) {
1197 err = -EAFNOSUPPORT;
1198 goto out;
1199 }
1200 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1201 &x->id.daddr);
1202
1203 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1205 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206 if (mode < 0) {
1207 err = -EINVAL;
1208 goto out;
1209 }
1210 x->props.mode = mode;
1211 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212 }
1213
1214 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216
1217 /* Nobody uses this, but we try. */
1218 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220 }
1221
1222 if (!x->sel.family)
1223 x->sel.family = x->props.family;
1224
1225 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226 struct sadb_x_nat_t_type* n_type;
1227 struct xfrm_encap_tmpl *natt;
1228
1229 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230 if (!x->encap)
1231 goto out;
1232
1233 natt = x->encap;
1234 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238 struct sadb_x_nat_t_port* n_port =
1239 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241 }
1242 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243 struct sadb_x_nat_t_port* n_port =
1244 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246 }
1247 }
1248
1249 err = xfrm_init_state(x);
1250 if (err)
1251 goto out;
1252
1253 x->km.seq = hdr->sadb_msg_seq;
1254 return x;
1255
1256 out:
1257 x->km.state = XFRM_STATE_DEAD;
1258 xfrm_state_put(x);
1259 return ERR_PTR(err);
1260 }
1261
1262 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1263 {
1264 return -EOPNOTSUPP;
1265 }
1266
1267 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1268 {
1269 struct sk_buff *resp_skb;
1270 struct sadb_x_sa2 *sa2;
1271 struct sadb_address *saddr, *daddr;
1272 struct sadb_msg *out_hdr;
1273 struct sadb_spirange *range;
1274 struct xfrm_state *x = NULL;
1275 int mode;
1276 int err;
1277 u32 min_spi, max_spi;
1278 u32 reqid;
1279 u8 proto;
1280 unsigned short family;
1281 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1282
1283 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1284 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1285 return -EINVAL;
1286
1287 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1288 if (proto == 0)
1289 return -EINVAL;
1290
1291 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1292 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1293 if (mode < 0)
1294 return -EINVAL;
1295 reqid = sa2->sadb_x_sa2_reqid;
1296 } else {
1297 mode = 0;
1298 reqid = 0;
1299 }
1300
1301 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1302 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1303
1304 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1305 switch (family) {
1306 case AF_INET:
1307 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1308 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1309 break;
1310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1311 case AF_INET6:
1312 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1313 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1314 break;
1315 #endif
1316 }
1317
1318 if (hdr->sadb_msg_seq) {
1319 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1320 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1321 xfrm_state_put(x);
1322 x = NULL;
1323 }
1324 }
1325
1326 if (!x)
1327 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1328
1329 if (x == NULL)
1330 return -ENOENT;
1331
1332 min_spi = 0x100;
1333 max_spi = 0x0fffffff;
1334
1335 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1336 if (range) {
1337 min_spi = range->sadb_spirange_min;
1338 max_spi = range->sadb_spirange_max;
1339 }
1340
1341 err = xfrm_alloc_spi(x, min_spi, max_spi);
1342 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1343
1344 if (IS_ERR(resp_skb)) {
1345 xfrm_state_put(x);
1346 return PTR_ERR(resp_skb);
1347 }
1348
1349 out_hdr = (struct sadb_msg *) resp_skb->data;
1350 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1351 out_hdr->sadb_msg_type = SADB_GETSPI;
1352 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1353 out_hdr->sadb_msg_errno = 0;
1354 out_hdr->sadb_msg_reserved = 0;
1355 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1356 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1357
1358 xfrm_state_put(x);
1359
1360 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1361
1362 return 0;
1363 }
1364
1365 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1366 {
1367 struct xfrm_state *x;
1368
1369 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1370 return -EOPNOTSUPP;
1371
1372 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1373 return 0;
1374
1375 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1376 if (x == NULL)
1377 return 0;
1378
1379 spin_lock_bh(&x->lock);
1380 if (x->km.state == XFRM_STATE_ACQ) {
1381 x->km.state = XFRM_STATE_ERROR;
1382 wake_up(&km_waitq);
1383 }
1384 spin_unlock_bh(&x->lock);
1385 xfrm_state_put(x);
1386 return 0;
1387 }
1388
1389 static inline int event2poltype(int event)
1390 {
1391 switch (event) {
1392 case XFRM_MSG_DELPOLICY:
1393 return SADB_X_SPDDELETE;
1394 case XFRM_MSG_NEWPOLICY:
1395 return SADB_X_SPDADD;
1396 case XFRM_MSG_UPDPOLICY:
1397 return SADB_X_SPDUPDATE;
1398 case XFRM_MSG_POLEXPIRE:
1399 // return SADB_X_SPDEXPIRE;
1400 default:
1401 printk("pfkey: Unknown policy event %d\n", event);
1402 break;
1403 }
1404
1405 return 0;
1406 }
1407
1408 static inline int event2keytype(int event)
1409 {
1410 switch (event) {
1411 case XFRM_MSG_DELSA:
1412 return SADB_DELETE;
1413 case XFRM_MSG_NEWSA:
1414 return SADB_ADD;
1415 case XFRM_MSG_UPDSA:
1416 return SADB_UPDATE;
1417 case XFRM_MSG_EXPIRE:
1418 return SADB_EXPIRE;
1419 default:
1420 printk("pfkey: Unknown SA event %d\n", event);
1421 break;
1422 }
1423
1424 return 0;
1425 }
1426
1427 /* ADD/UPD/DEL */
1428 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1429 {
1430 struct sk_buff *skb;
1431 struct sadb_msg *hdr;
1432
1433 skb = pfkey_xfrm_state2msg(x);
1434
1435 if (IS_ERR(skb))
1436 return PTR_ERR(skb);
1437
1438 hdr = (struct sadb_msg *) skb->data;
1439 hdr->sadb_msg_version = PF_KEY_V2;
1440 hdr->sadb_msg_type = event2keytype(c->event);
1441 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1442 hdr->sadb_msg_errno = 0;
1443 hdr->sadb_msg_reserved = 0;
1444 hdr->sadb_msg_seq = c->seq;
1445 hdr->sadb_msg_pid = c->pid;
1446
1447 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1448
1449 return 0;
1450 }
1451
1452 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1453 {
1454 struct xfrm_state *x;
1455 int err;
1456 struct km_event c;
1457
1458 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1459 if (IS_ERR(x))
1460 return PTR_ERR(x);
1461
1462 xfrm_state_hold(x);
1463 if (hdr->sadb_msg_type == SADB_ADD)
1464 err = xfrm_state_add(x);
1465 else
1466 err = xfrm_state_update(x);
1467
1468 xfrm_audit_state_add(x, err ? 0 : 1,
1469 audit_get_loginuid(current), 0);
1470
1471 if (err < 0) {
1472 x->km.state = XFRM_STATE_DEAD;
1473 __xfrm_state_put(x);
1474 goto out;
1475 }
1476
1477 if (hdr->sadb_msg_type == SADB_ADD)
1478 c.event = XFRM_MSG_NEWSA;
1479 else
1480 c.event = XFRM_MSG_UPDSA;
1481 c.seq = hdr->sadb_msg_seq;
1482 c.pid = hdr->sadb_msg_pid;
1483 km_state_notify(x, &c);
1484 out:
1485 xfrm_state_put(x);
1486 return err;
1487 }
1488
1489 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1490 {
1491 struct xfrm_state *x;
1492 struct km_event c;
1493 int err;
1494
1495 if (!ext_hdrs[SADB_EXT_SA-1] ||
1496 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1497 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1498 return -EINVAL;
1499
1500 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1501 if (x == NULL)
1502 return -ESRCH;
1503
1504 if ((err = security_xfrm_state_delete(x)))
1505 goto out;
1506
1507 if (xfrm_state_kern(x)) {
1508 err = -EPERM;
1509 goto out;
1510 }
1511
1512 err = xfrm_state_delete(x);
1513
1514 if (err < 0)
1515 goto out;
1516
1517 c.seq = hdr->sadb_msg_seq;
1518 c.pid = hdr->sadb_msg_pid;
1519 c.event = XFRM_MSG_DELSA;
1520 km_state_notify(x, &c);
1521 out:
1522 xfrm_audit_state_delete(x, err ? 0 : 1,
1523 audit_get_loginuid(current), 0);
1524 xfrm_state_put(x);
1525
1526 return err;
1527 }
1528
1529 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1530 {
1531 __u8 proto;
1532 struct sk_buff *out_skb;
1533 struct sadb_msg *out_hdr;
1534 struct xfrm_state *x;
1535
1536 if (!ext_hdrs[SADB_EXT_SA-1] ||
1537 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539 return -EINVAL;
1540
1541 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542 if (x == NULL)
1543 return -ESRCH;
1544
1545 out_skb = pfkey_xfrm_state2msg(x);
1546 proto = x->id.proto;
1547 xfrm_state_put(x);
1548 if (IS_ERR(out_skb))
1549 return PTR_ERR(out_skb);
1550
1551 out_hdr = (struct sadb_msg *) out_skb->data;
1552 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1553 out_hdr->sadb_msg_type = SADB_GET;
1554 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1555 out_hdr->sadb_msg_errno = 0;
1556 out_hdr->sadb_msg_reserved = 0;
1557 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1558 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1559 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1560
1561 return 0;
1562 }
1563
1564 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1565 gfp_t allocation)
1566 {
1567 struct sk_buff *skb;
1568 struct sadb_msg *hdr;
1569 int len, auth_len, enc_len, i;
1570
1571 auth_len = xfrm_count_auth_supported();
1572 if (auth_len) {
1573 auth_len *= sizeof(struct sadb_alg);
1574 auth_len += sizeof(struct sadb_supported);
1575 }
1576
1577 enc_len = xfrm_count_enc_supported();
1578 if (enc_len) {
1579 enc_len *= sizeof(struct sadb_alg);
1580 enc_len += sizeof(struct sadb_supported);
1581 }
1582
1583 len = enc_len + auth_len + sizeof(struct sadb_msg);
1584
1585 skb = alloc_skb(len + 16, allocation);
1586 if (!skb)
1587 goto out_put_algs;
1588
1589 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1590 pfkey_hdr_dup(hdr, orig);
1591 hdr->sadb_msg_errno = 0;
1592 hdr->sadb_msg_len = len / sizeof(uint64_t);
1593
1594 if (auth_len) {
1595 struct sadb_supported *sp;
1596 struct sadb_alg *ap;
1597
1598 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1599 ap = (struct sadb_alg *) (sp + 1);
1600
1601 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1602 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1603
1604 for (i = 0; ; i++) {
1605 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1606 if (!aalg)
1607 break;
1608 if (aalg->available)
1609 *ap++ = aalg->desc;
1610 }
1611 }
1612
1613 if (enc_len) {
1614 struct sadb_supported *sp;
1615 struct sadb_alg *ap;
1616
1617 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1618 ap = (struct sadb_alg *) (sp + 1);
1619
1620 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1621 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1622
1623 for (i = 0; ; i++) {
1624 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1625 if (!ealg)
1626 break;
1627 if (ealg->available)
1628 *ap++ = ealg->desc;
1629 }
1630 }
1631
1632 out_put_algs:
1633 return skb;
1634 }
1635
1636 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637 {
1638 struct pfkey_sock *pfk = pfkey_sk(sk);
1639 struct sk_buff *supp_skb;
1640
1641 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1642 return -EINVAL;
1643
1644 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1645 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1646 return -EEXIST;
1647 pfk->registered |= (1<<hdr->sadb_msg_satype);
1648 }
1649
1650 xfrm_probe_algs();
1651
1652 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1653 if (!supp_skb) {
1654 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1655 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1656
1657 return -ENOBUFS;
1658 }
1659
1660 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1661
1662 return 0;
1663 }
1664
1665 static int key_notify_sa_flush(struct km_event *c)
1666 {
1667 struct sk_buff *skb;
1668 struct sadb_msg *hdr;
1669
1670 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1671 if (!skb)
1672 return -ENOBUFS;
1673 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1674 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1675 hdr->sadb_msg_type = SADB_FLUSH;
1676 hdr->sadb_msg_seq = c->seq;
1677 hdr->sadb_msg_pid = c->pid;
1678 hdr->sadb_msg_version = PF_KEY_V2;
1679 hdr->sadb_msg_errno = (uint8_t) 0;
1680 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1681
1682 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1683
1684 return 0;
1685 }
1686
1687 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1688 {
1689 unsigned proto;
1690 struct km_event c;
1691 struct xfrm_audit audit_info;
1692 int err;
1693
1694 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1695 if (proto == 0)
1696 return -EINVAL;
1697
1698 audit_info.loginuid = audit_get_loginuid(current);
1699 audit_info.secid = 0;
1700 err = xfrm_state_flush(proto, &audit_info);
1701 if (err)
1702 return err;
1703 c.data.proto = proto;
1704 c.seq = hdr->sadb_msg_seq;
1705 c.pid = hdr->sadb_msg_pid;
1706 c.event = XFRM_MSG_FLUSHSA;
1707 km_state_notify(NULL, &c);
1708
1709 return 0;
1710 }
1711
1712 struct pfkey_dump_data
1713 {
1714 struct sk_buff *skb;
1715 struct sadb_msg *hdr;
1716 struct sock *sk;
1717 };
1718
1719 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1720 {
1721 struct pfkey_dump_data *data = ptr;
1722 struct sk_buff *out_skb;
1723 struct sadb_msg *out_hdr;
1724
1725 out_skb = pfkey_xfrm_state2msg(x);
1726 if (IS_ERR(out_skb))
1727 return PTR_ERR(out_skb);
1728
1729 out_hdr = (struct sadb_msg *) out_skb->data;
1730 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1731 out_hdr->sadb_msg_type = SADB_DUMP;
1732 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1733 out_hdr->sadb_msg_errno = 0;
1734 out_hdr->sadb_msg_reserved = 0;
1735 out_hdr->sadb_msg_seq = count;
1736 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1737 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1738 return 0;
1739 }
1740
1741 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1742 {
1743 u8 proto;
1744 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1745
1746 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1747 if (proto == 0)
1748 return -EINVAL;
1749
1750 return xfrm_state_walk(proto, dump_sa, &data);
1751 }
1752
1753 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1754 {
1755 struct pfkey_sock *pfk = pfkey_sk(sk);
1756 int satype = hdr->sadb_msg_satype;
1757
1758 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1759 /* XXX we mangle packet... */
1760 hdr->sadb_msg_errno = 0;
1761 if (satype != 0 && satype != 1)
1762 return -EINVAL;
1763 pfk->promisc = satype;
1764 }
1765 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1766 return 0;
1767 }
1768
1769 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1770 {
1771 int i;
1772 u32 reqid = *(u32*)ptr;
1773
1774 for (i=0; i<xp->xfrm_nr; i++) {
1775 if (xp->xfrm_vec[i].reqid == reqid)
1776 return -EEXIST;
1777 }
1778 return 0;
1779 }
1780
1781 static u32 gen_reqid(void)
1782 {
1783 u32 start;
1784 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1785
1786 start = reqid;
1787 do {
1788 ++reqid;
1789 if (reqid == 0)
1790 reqid = IPSEC_MANUAL_REQID_MAX+1;
1791 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1792 (void*)&reqid) != -EEXIST)
1793 return reqid;
1794 } while (reqid != start);
1795 return 0;
1796 }
1797
1798 static int
1799 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1800 {
1801 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1802 struct sockaddr_in *sin;
1803 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1804 struct sockaddr_in6 *sin6;
1805 #endif
1806 int mode;
1807
1808 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1809 return -ELOOP;
1810
1811 if (rq->sadb_x_ipsecrequest_mode == 0)
1812 return -EINVAL;
1813
1814 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1815 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1816 return -EINVAL;
1817 t->mode = mode;
1818 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1819 t->optional = 1;
1820 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1821 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1822 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1823 t->reqid = 0;
1824 if (!t->reqid && !(t->reqid = gen_reqid()))
1825 return -ENOBUFS;
1826 }
1827
1828 /* addresses present only in tunnel mode */
1829 if (t->mode == XFRM_MODE_TUNNEL) {
1830 struct sockaddr *sa;
1831 sa = (struct sockaddr *)(rq+1);
1832 switch(sa->sa_family) {
1833 case AF_INET:
1834 sin = (struct sockaddr_in*)sa;
1835 t->saddr.a4 = sin->sin_addr.s_addr;
1836 sin++;
1837 if (sin->sin_family != AF_INET)
1838 return -EINVAL;
1839 t->id.daddr.a4 = sin->sin_addr.s_addr;
1840 break;
1841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1842 case AF_INET6:
1843 sin6 = (struct sockaddr_in6*)sa;
1844 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1845 sin6++;
1846 if (sin6->sin6_family != AF_INET6)
1847 return -EINVAL;
1848 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1849 break;
1850 #endif
1851 default:
1852 return -EINVAL;
1853 }
1854 t->encap_family = sa->sa_family;
1855 } else
1856 t->encap_family = xp->family;
1857
1858 /* No way to set this via kame pfkey */
1859 t->aalgos = t->ealgos = t->calgos = ~0;
1860 xp->xfrm_nr++;
1861 return 0;
1862 }
1863
1864 static int
1865 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1866 {
1867 int err;
1868 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1869 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1870
1871 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1872 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1873 return err;
1874 len -= rq->sadb_x_ipsecrequest_len;
1875 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1876 }
1877 return 0;
1878 }
1879
1880 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1881 {
1882 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1883
1884 if (xfrm_ctx) {
1885 int len = sizeof(struct sadb_x_sec_ctx);
1886 len += xfrm_ctx->ctx_len;
1887 return PFKEY_ALIGN8(len);
1888 }
1889 return 0;
1890 }
1891
1892 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1893 {
1894 struct xfrm_tmpl *t;
1895 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1896 int socklen = 0;
1897 int i;
1898
1899 for (i=0; i<xp->xfrm_nr; i++) {
1900 t = xp->xfrm_vec + i;
1901 socklen += (t->encap_family == AF_INET ?
1902 sizeof(struct sockaddr_in) :
1903 sizeof(struct sockaddr_in6));
1904 }
1905
1906 return sizeof(struct sadb_msg) +
1907 (sizeof(struct sadb_lifetime) * 3) +
1908 (sizeof(struct sadb_address) * 2) +
1909 (sockaddr_size * 2) +
1910 sizeof(struct sadb_x_policy) +
1911 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1912 (socklen * 2) +
1913 pfkey_xfrm_policy2sec_ctx_size(xp);
1914 }
1915
1916 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1917 {
1918 struct sk_buff *skb;
1919 int size;
1920
1921 size = pfkey_xfrm_policy2msg_size(xp);
1922
1923 skb = alloc_skb(size + 16, GFP_ATOMIC);
1924 if (skb == NULL)
1925 return ERR_PTR(-ENOBUFS);
1926
1927 return skb;
1928 }
1929
1930 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1931 {
1932 struct sadb_msg *hdr;
1933 struct sadb_address *addr;
1934 struct sadb_lifetime *lifetime;
1935 struct sadb_x_policy *pol;
1936 struct sockaddr_in *sin;
1937 struct sadb_x_sec_ctx *sec_ctx;
1938 struct xfrm_sec_ctx *xfrm_ctx;
1939 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1940 struct sockaddr_in6 *sin6;
1941 #endif
1942 int i;
1943 int size;
1944 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1945 int socklen = (xp->family == AF_INET ?
1946 sizeof(struct sockaddr_in) :
1947 sizeof(struct sockaddr_in6));
1948
1949 size = pfkey_xfrm_policy2msg_size(xp);
1950
1951 /* call should fill header later */
1952 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1953 memset(hdr, 0, size); /* XXX do we need this ? */
1954
1955 /* src address */
1956 addr = (struct sadb_address*) skb_put(skb,
1957 sizeof(struct sadb_address)+sockaddr_size);
1958 addr->sadb_address_len =
1959 (sizeof(struct sadb_address)+sockaddr_size)/
1960 sizeof(uint64_t);
1961 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1962 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1963 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1964 addr->sadb_address_reserved = 0;
1965 /* src address */
1966 if (xp->family == AF_INET) {
1967 sin = (struct sockaddr_in *) (addr + 1);
1968 sin->sin_family = AF_INET;
1969 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1970 sin->sin_port = xp->selector.sport;
1971 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1972 }
1973 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1974 else if (xp->family == AF_INET6) {
1975 sin6 = (struct sockaddr_in6 *) (addr + 1);
1976 sin6->sin6_family = AF_INET6;
1977 sin6->sin6_port = xp->selector.sport;
1978 sin6->sin6_flowinfo = 0;
1979 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1980 sizeof(struct in6_addr));
1981 sin6->sin6_scope_id = 0;
1982 }
1983 #endif
1984 else
1985 BUG();
1986
1987 /* dst address */
1988 addr = (struct sadb_address*) skb_put(skb,
1989 sizeof(struct sadb_address)+sockaddr_size);
1990 addr->sadb_address_len =
1991 (sizeof(struct sadb_address)+sockaddr_size)/
1992 sizeof(uint64_t);
1993 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1994 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1995 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1996 addr->sadb_address_reserved = 0;
1997 if (xp->family == AF_INET) {
1998 sin = (struct sockaddr_in *) (addr + 1);
1999 sin->sin_family = AF_INET;
2000 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2001 sin->sin_port = xp->selector.dport;
2002 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2003 }
2004 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2005 else if (xp->family == AF_INET6) {
2006 sin6 = (struct sockaddr_in6 *) (addr + 1);
2007 sin6->sin6_family = AF_INET6;
2008 sin6->sin6_port = xp->selector.dport;
2009 sin6->sin6_flowinfo = 0;
2010 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2011 sizeof(struct in6_addr));
2012 sin6->sin6_scope_id = 0;
2013 }
2014 #endif
2015 else
2016 BUG();
2017
2018 /* hard time */
2019 lifetime = (struct sadb_lifetime *) skb_put(skb,
2020 sizeof(struct sadb_lifetime));
2021 lifetime->sadb_lifetime_len =
2022 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2023 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2024 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2025 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2026 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2027 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2028 /* soft time */
2029 lifetime = (struct sadb_lifetime *) skb_put(skb,
2030 sizeof(struct sadb_lifetime));
2031 lifetime->sadb_lifetime_len =
2032 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2033 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2034 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2035 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2036 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2037 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2038 /* current time */
2039 lifetime = (struct sadb_lifetime *) skb_put(skb,
2040 sizeof(struct sadb_lifetime));
2041 lifetime->sadb_lifetime_len =
2042 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2043 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2044 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2045 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2046 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2047 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2048
2049 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2050 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2051 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2052 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2053 if (xp->action == XFRM_POLICY_ALLOW) {
2054 if (xp->xfrm_nr)
2055 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2056 else
2057 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2058 }
2059 pol->sadb_x_policy_dir = dir+1;
2060 pol->sadb_x_policy_id = xp->index;
2061 pol->sadb_x_policy_priority = xp->priority;
2062
2063 for (i=0; i<xp->xfrm_nr; i++) {
2064 struct sadb_x_ipsecrequest *rq;
2065 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2066 int req_size;
2067 int mode;
2068
2069 req_size = sizeof(struct sadb_x_ipsecrequest);
2070 if (t->mode == XFRM_MODE_TUNNEL)
2071 req_size += ((t->encap_family == AF_INET ?
2072 sizeof(struct sockaddr_in) :
2073 sizeof(struct sockaddr_in6)) * 2);
2074 else
2075 size -= 2*socklen;
2076 rq = (void*)skb_put(skb, req_size);
2077 pol->sadb_x_policy_len += req_size/8;
2078 memset(rq, 0, sizeof(*rq));
2079 rq->sadb_x_ipsecrequest_len = req_size;
2080 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2081 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2082 return -EINVAL;
2083 rq->sadb_x_ipsecrequest_mode = mode;
2084 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2085 if (t->reqid)
2086 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2087 if (t->optional)
2088 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2089 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2090 if (t->mode == XFRM_MODE_TUNNEL) {
2091 switch (t->encap_family) {
2092 case AF_INET:
2093 sin = (void*)(rq+1);
2094 sin->sin_family = AF_INET;
2095 sin->sin_addr.s_addr = t->saddr.a4;
2096 sin->sin_port = 0;
2097 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2098 sin++;
2099 sin->sin_family = AF_INET;
2100 sin->sin_addr.s_addr = t->id.daddr.a4;
2101 sin->sin_port = 0;
2102 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2103 break;
2104 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2105 case AF_INET6:
2106 sin6 = (void*)(rq+1);
2107 sin6->sin6_family = AF_INET6;
2108 sin6->sin6_port = 0;
2109 sin6->sin6_flowinfo = 0;
2110 memcpy(&sin6->sin6_addr, t->saddr.a6,
2111 sizeof(struct in6_addr));
2112 sin6->sin6_scope_id = 0;
2113
2114 sin6++;
2115 sin6->sin6_family = AF_INET6;
2116 sin6->sin6_port = 0;
2117 sin6->sin6_flowinfo = 0;
2118 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2119 sizeof(struct in6_addr));
2120 sin6->sin6_scope_id = 0;
2121 break;
2122 #endif
2123 default:
2124 break;
2125 }
2126 }
2127 }
2128
2129 /* security context */
2130 if ((xfrm_ctx = xp->security)) {
2131 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2132
2133 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2134 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2135 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2136 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2137 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2138 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2139 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2140 xfrm_ctx->ctx_len);
2141 }
2142
2143 hdr->sadb_msg_len = size / sizeof(uint64_t);
2144 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2145
2146 return 0;
2147 }
2148
2149 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2150 {
2151 struct sk_buff *out_skb;
2152 struct sadb_msg *out_hdr;
2153 int err;
2154
2155 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2156 if (IS_ERR(out_skb)) {
2157 err = PTR_ERR(out_skb);
2158 goto out;
2159 }
2160 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2161 if (err < 0)
2162 return err;
2163
2164 out_hdr = (struct sadb_msg *) out_skb->data;
2165 out_hdr->sadb_msg_version = PF_KEY_V2;
2166
2167 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2168 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2169 else
2170 out_hdr->sadb_msg_type = event2poltype(c->event);
2171 out_hdr->sadb_msg_errno = 0;
2172 out_hdr->sadb_msg_seq = c->seq;
2173 out_hdr->sadb_msg_pid = c->pid;
2174 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2175 out:
2176 return 0;
2177
2178 }
2179
2180 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2181 {
2182 int err = 0;
2183 struct sadb_lifetime *lifetime;
2184 struct sadb_address *sa;
2185 struct sadb_x_policy *pol;
2186 struct xfrm_policy *xp;
2187 struct km_event c;
2188 struct sadb_x_sec_ctx *sec_ctx;
2189
2190 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2191 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2192 !ext_hdrs[SADB_X_EXT_POLICY-1])
2193 return -EINVAL;
2194
2195 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2196 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2197 return -EINVAL;
2198 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2199 return -EINVAL;
2200
2201 xp = xfrm_policy_alloc(GFP_KERNEL);
2202 if (xp == NULL)
2203 return -ENOBUFS;
2204
2205 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2206 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2207 xp->priority = pol->sadb_x_policy_priority;
2208
2209 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2210 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2211 if (!xp->family) {
2212 err = -EINVAL;
2213 goto out;
2214 }
2215 xp->selector.family = xp->family;
2216 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2217 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2218 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2219 if (xp->selector.sport)
2220 xp->selector.sport_mask = htons(0xffff);
2221
2222 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2223 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2224 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2225
2226 /* Amusing, we set this twice. KAME apps appear to set same value
2227 * in both addresses.
2228 */
2229 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2230
2231 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2232 if (xp->selector.dport)
2233 xp->selector.dport_mask = htons(0xffff);
2234
2235 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2236 if (sec_ctx != NULL) {
2237 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2238
2239 if (!uctx) {
2240 err = -ENOBUFS;
2241 goto out;
2242 }
2243
2244 err = security_xfrm_policy_alloc(xp, uctx);
2245 kfree(uctx);
2246
2247 if (err)
2248 goto out;
2249 }
2250
2251 xp->lft.soft_byte_limit = XFRM_INF;
2252 xp->lft.hard_byte_limit = XFRM_INF;
2253 xp->lft.soft_packet_limit = XFRM_INF;
2254 xp->lft.hard_packet_limit = XFRM_INF;
2255 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2256 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2257 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2258 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2259 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2260 }
2261 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2262 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2263 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2264 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2265 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2266 }
2267 xp->xfrm_nr = 0;
2268 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2269 (err = parse_ipsecrequests(xp, pol)) < 0)
2270 goto out;
2271
2272 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2273 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2274
2275 xfrm_audit_policy_add(xp, err ? 0 : 1,
2276 audit_get_loginuid(current), 0);
2277
2278 if (err)
2279 goto out;
2280
2281 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2282 c.event = XFRM_MSG_UPDPOLICY;
2283 else
2284 c.event = XFRM_MSG_NEWPOLICY;
2285
2286 c.seq = hdr->sadb_msg_seq;
2287 c.pid = hdr->sadb_msg_pid;
2288
2289 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2290 xfrm_pol_put(xp);
2291 return 0;
2292
2293 out:
2294 xp->dead = 1;
2295 xfrm_policy_destroy(xp);
2296 return err;
2297 }
2298
2299 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2300 {
2301 int err;
2302 struct sadb_address *sa;
2303 struct sadb_x_policy *pol;
2304 struct xfrm_policy *xp, tmp;
2305 struct xfrm_selector sel;
2306 struct km_event c;
2307 struct sadb_x_sec_ctx *sec_ctx;
2308
2309 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2310 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2311 !ext_hdrs[SADB_X_EXT_POLICY-1])
2312 return -EINVAL;
2313
2314 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2315 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2316 return -EINVAL;
2317
2318 memset(&sel, 0, sizeof(sel));
2319
2320 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2321 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2322 sel.prefixlen_s = sa->sadb_address_prefixlen;
2323 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325 if (sel.sport)
2326 sel.sport_mask = htons(0xffff);
2327
2328 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2329 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2330 sel.prefixlen_d = sa->sadb_address_prefixlen;
2331 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2332 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2333 if (sel.dport)
2334 sel.dport_mask = htons(0xffff);
2335
2336 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2337 memset(&tmp, 0, sizeof(struct xfrm_policy));
2338
2339 if (sec_ctx != NULL) {
2340 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2341
2342 if (!uctx)
2343 return -ENOMEM;
2344
2345 err = security_xfrm_policy_alloc(&tmp, uctx);
2346 kfree(uctx);
2347
2348 if (err)
2349 return err;
2350 }
2351
2352 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2353 &sel, tmp.security, 1, &err);
2354 security_xfrm_policy_free(&tmp);
2355
2356 if (xp == NULL)
2357 return -ENOENT;
2358
2359 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2360 audit_get_loginuid(current), 0);
2361
2362 if (err)
2363 goto out;
2364
2365 c.seq = hdr->sadb_msg_seq;
2366 c.pid = hdr->sadb_msg_pid;
2367 c.event = XFRM_MSG_DELPOLICY;
2368 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2369
2370 out:
2371 xfrm_pol_put(xp);
2372 return err;
2373 }
2374
2375 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2376 {
2377 int err;
2378 struct sk_buff *out_skb;
2379 struct sadb_msg *out_hdr;
2380 err = 0;
2381
2382 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2383 if (IS_ERR(out_skb)) {
2384 err = PTR_ERR(out_skb);
2385 goto out;
2386 }
2387 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2388 if (err < 0)
2389 goto out;
2390
2391 out_hdr = (struct sadb_msg *) out_skb->data;
2392 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2393 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2394 out_hdr->sadb_msg_satype = 0;
2395 out_hdr->sadb_msg_errno = 0;
2396 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2397 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2398 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2399 err = 0;
2400
2401 out:
2402 return err;
2403 }
2404
2405 #ifdef CONFIG_NET_KEY_MIGRATE
2406 static int pfkey_sockaddr_pair_size(sa_family_t family)
2407 {
2408 switch (family) {
2409 case AF_INET:
2410 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2411 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2412 case AF_INET6:
2413 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2414 #endif
2415 default:
2416 return 0;
2417 }
2418 /* NOTREACHED */
2419 }
2420
2421 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2422 xfrm_address_t *saddr, xfrm_address_t *daddr,
2423 u16 *family)
2424 {
2425 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2426 if (rq->sadb_x_ipsecrequest_len <
2427 pfkey_sockaddr_pair_size(sa->sa_family))
2428 return -EINVAL;
2429
2430 switch (sa->sa_family) {
2431 case AF_INET:
2432 {
2433 struct sockaddr_in *sin;
2434 sin = (struct sockaddr_in *)sa;
2435 if ((sin+1)->sin_family != AF_INET)
2436 return -EINVAL;
2437 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2438 sin++;
2439 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2440 *family = AF_INET;
2441 break;
2442 }
2443 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2444 case AF_INET6:
2445 {
2446 struct sockaddr_in6 *sin6;
2447 sin6 = (struct sockaddr_in6 *)sa;
2448 if ((sin6+1)->sin6_family != AF_INET6)
2449 return -EINVAL;
2450 memcpy(&saddr->a6, &sin6->sin6_addr,
2451 sizeof(saddr->a6));
2452 sin6++;
2453 memcpy(&daddr->a6, &sin6->sin6_addr,
2454 sizeof(daddr->a6));
2455 *family = AF_INET6;
2456 break;
2457 }
2458 #endif
2459 default:
2460 return -EINVAL;
2461 }
2462
2463 return 0;
2464 }
2465
2466 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2467 struct xfrm_migrate *m)
2468 {
2469 int err;
2470 struct sadb_x_ipsecrequest *rq2;
2471 int mode;
2472
2473 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2474 len < rq1->sadb_x_ipsecrequest_len)
2475 return -EINVAL;
2476
2477 /* old endoints */
2478 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2479 &m->old_family);
2480 if (err)
2481 return err;
2482
2483 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2484 len -= rq1->sadb_x_ipsecrequest_len;
2485
2486 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2487 len < rq2->sadb_x_ipsecrequest_len)
2488 return -EINVAL;
2489
2490 /* new endpoints */
2491 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2492 &m->new_family);
2493 if (err)
2494 return err;
2495
2496 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2497 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2498 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2499 return -EINVAL;
2500
2501 m->proto = rq1->sadb_x_ipsecrequest_proto;
2502 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2503 return -EINVAL;
2504 m->mode = mode;
2505 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2506
2507 return ((int)(rq1->sadb_x_ipsecrequest_len +
2508 rq2->sadb_x_ipsecrequest_len));
2509 }
2510
2511 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2512 struct sadb_msg *hdr, void **ext_hdrs)
2513 {
2514 int i, len, ret, err = -EINVAL;
2515 u8 dir;
2516 struct sadb_address *sa;
2517 struct sadb_x_policy *pol;
2518 struct sadb_x_ipsecrequest *rq;
2519 struct xfrm_selector sel;
2520 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2521
2522 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2523 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2524 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2525 err = -EINVAL;
2526 goto out;
2527 }
2528
2529 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2530 if (!pol) {
2531 err = -EINVAL;
2532 goto out;
2533 }
2534
2535 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2536 err = -EINVAL;
2537 goto out;
2538 }
2539
2540 dir = pol->sadb_x_policy_dir - 1;
2541 memset(&sel, 0, sizeof(sel));
2542
2543 /* set source address info of selector */
2544 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2545 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2546 sel.prefixlen_s = sa->sadb_address_prefixlen;
2547 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2548 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2549 if (sel.sport)
2550 sel.sport_mask = htons(0xffff);
2551
2552 /* set destination address info of selector */
2553 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2554 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2555 sel.prefixlen_d = sa->sadb_address_prefixlen;
2556 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2557 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2558 if (sel.dport)
2559 sel.dport_mask = htons(0xffff);
2560
2561 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2562
2563 /* extract ipsecrequests */
2564 i = 0;
2565 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2566
2567 while (len > 0 && i < XFRM_MAX_DEPTH) {
2568 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2569 if (ret < 0) {
2570 err = ret;
2571 goto out;
2572 } else {
2573 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2574 len -= ret;
2575 i++;
2576 }
2577 }
2578
2579 if (!i || len > 0) {
2580 err = -EINVAL;
2581 goto out;
2582 }
2583
2584 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2585
2586 out:
2587 return err;
2588 }
2589 #else
2590 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2591 struct sadb_msg *hdr, void **ext_hdrs)
2592 {
2593 return -ENOPROTOOPT;
2594 }
2595 #endif
2596
2597
2598 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2599 {
2600 unsigned int dir;
2601 int err = 0, delete;
2602 struct sadb_x_policy *pol;
2603 struct xfrm_policy *xp;
2604 struct km_event c;
2605
2606 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2607 return -EINVAL;
2608
2609 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2610 if (dir >= XFRM_POLICY_MAX)
2611 return -EINVAL;
2612
2613 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2614 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2615 delete, &err);
2616 if (xp == NULL)
2617 return -ENOENT;
2618
2619 if (delete) {
2620 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2621 audit_get_loginuid(current), 0);
2622
2623 if (err)
2624 goto out;
2625 c.seq = hdr->sadb_msg_seq;
2626 c.pid = hdr->sadb_msg_pid;
2627 c.data.byid = 1;
2628 c.event = XFRM_MSG_DELPOLICY;
2629 km_policy_notify(xp, dir, &c);
2630 } else {
2631 err = key_pol_get_resp(sk, xp, hdr, dir);
2632 }
2633
2634 out:
2635 xfrm_pol_put(xp);
2636 return err;
2637 }
2638
2639 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2640 {
2641 struct pfkey_dump_data *data = ptr;
2642 struct sk_buff *out_skb;
2643 struct sadb_msg *out_hdr;
2644 int err;
2645
2646 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2647 if (IS_ERR(out_skb))
2648 return PTR_ERR(out_skb);
2649
2650 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2651 if (err < 0)
2652 return err;
2653
2654 out_hdr = (struct sadb_msg *) out_skb->data;
2655 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2656 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2657 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2658 out_hdr->sadb_msg_errno = 0;
2659 out_hdr->sadb_msg_seq = count;
2660 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2661 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2662 return 0;
2663 }
2664
2665 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2666 {
2667 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2668
2669 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2670 }
2671
2672 static int key_notify_policy_flush(struct km_event *c)
2673 {
2674 struct sk_buff *skb_out;
2675 struct sadb_msg *hdr;
2676
2677 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2678 if (!skb_out)
2679 return -ENOBUFS;
2680 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2681 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2682 hdr->sadb_msg_seq = c->seq;
2683 hdr->sadb_msg_pid = c->pid;
2684 hdr->sadb_msg_version = PF_KEY_V2;
2685 hdr->sadb_msg_errno = (uint8_t) 0;
2686 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2687 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2688 return 0;
2689
2690 }
2691
2692 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2693 {
2694 struct km_event c;
2695 struct xfrm_audit audit_info;
2696 int err;
2697
2698 audit_info.loginuid = audit_get_loginuid(current);
2699 audit_info.secid = 0;
2700 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2701 if (err)
2702 return err;
2703 c.data.type = XFRM_POLICY_TYPE_MAIN;
2704 c.event = XFRM_MSG_FLUSHPOLICY;
2705 c.pid = hdr->sadb_msg_pid;
2706 c.seq = hdr->sadb_msg_seq;
2707 km_policy_notify(NULL, 0, &c);
2708
2709 return 0;
2710 }
2711
2712 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2713 struct sadb_msg *hdr, void **ext_hdrs);
2714 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2715 [SADB_RESERVED] = pfkey_reserved,
2716 [SADB_GETSPI] = pfkey_getspi,
2717 [SADB_UPDATE] = pfkey_add,
2718 [SADB_ADD] = pfkey_add,
2719 [SADB_DELETE] = pfkey_delete,
2720 [SADB_GET] = pfkey_get,
2721 [SADB_ACQUIRE] = pfkey_acquire,
2722 [SADB_REGISTER] = pfkey_register,
2723 [SADB_EXPIRE] = NULL,
2724 [SADB_FLUSH] = pfkey_flush,
2725 [SADB_DUMP] = pfkey_dump,
2726 [SADB_X_PROMISC] = pfkey_promisc,
2727 [SADB_X_PCHANGE] = NULL,
2728 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2729 [SADB_X_SPDADD] = pfkey_spdadd,
2730 [SADB_X_SPDDELETE] = pfkey_spddelete,
2731 [SADB_X_SPDGET] = pfkey_spdget,
2732 [SADB_X_SPDACQUIRE] = NULL,
2733 [SADB_X_SPDDUMP] = pfkey_spddump,
2734 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2735 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2736 [SADB_X_SPDDELETE2] = pfkey_spdget,
2737 [SADB_X_MIGRATE] = pfkey_migrate,
2738 };
2739
2740 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2741 {
2742 void *ext_hdrs[SADB_EXT_MAX];
2743 int err;
2744
2745 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2746 BROADCAST_PROMISC_ONLY, NULL);
2747
2748 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2749 err = parse_exthdrs(skb, hdr, ext_hdrs);
2750 if (!err) {
2751 err = -EOPNOTSUPP;
2752 if (pfkey_funcs[hdr->sadb_msg_type])
2753 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2754 }
2755 return err;
2756 }
2757
2758 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2759 {
2760 struct sadb_msg *hdr = NULL;
2761
2762 if (skb->len < sizeof(*hdr)) {
2763 *errp = -EMSGSIZE;
2764 } else {
2765 hdr = (struct sadb_msg *) skb->data;
2766 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2767 hdr->sadb_msg_reserved != 0 ||
2768 (hdr->sadb_msg_type <= SADB_RESERVED ||
2769 hdr->sadb_msg_type > SADB_MAX)) {
2770 hdr = NULL;
2771 *errp = -EINVAL;
2772 } else if (hdr->sadb_msg_len != (skb->len /
2773 sizeof(uint64_t)) ||
2774 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2775 sizeof(uint64_t))) {
2776 hdr = NULL;
2777 *errp = -EMSGSIZE;
2778 } else {
2779 *errp = 0;
2780 }
2781 }
2782 return hdr;
2783 }
2784
2785 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2786 {
2787 unsigned int id = d->desc.sadb_alg_id;
2788
2789 if (id >= sizeof(t->aalgos) * 8)
2790 return 0;
2791
2792 return (t->aalgos >> id) & 1;
2793 }
2794
2795 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2796 {
2797 unsigned int id = d->desc.sadb_alg_id;
2798
2799 if (id >= sizeof(t->ealgos) * 8)
2800 return 0;
2801
2802 return (t->ealgos >> id) & 1;
2803 }
2804
2805 static int count_ah_combs(struct xfrm_tmpl *t)
2806 {
2807 int i, sz = 0;
2808
2809 for (i = 0; ; i++) {
2810 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2811 if (!aalg)
2812 break;
2813 if (aalg_tmpl_set(t, aalg) && aalg->available)
2814 sz += sizeof(struct sadb_comb);
2815 }
2816 return sz + sizeof(struct sadb_prop);
2817 }
2818
2819 static int count_esp_combs(struct xfrm_tmpl *t)
2820 {
2821 int i, k, sz = 0;
2822
2823 for (i = 0; ; i++) {
2824 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2825 if (!ealg)
2826 break;
2827
2828 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2829 continue;
2830
2831 for (k = 1; ; k++) {
2832 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2833 if (!aalg)
2834 break;
2835
2836 if (aalg_tmpl_set(t, aalg) && aalg->available)
2837 sz += sizeof(struct sadb_comb);
2838 }
2839 }
2840 return sz + sizeof(struct sadb_prop);
2841 }
2842
2843 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2844 {
2845 struct sadb_prop *p;
2846 int i;
2847
2848 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2849 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2850 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2851 p->sadb_prop_replay = 32;
2852 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2853
2854 for (i = 0; ; i++) {
2855 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2856 if (!aalg)
2857 break;
2858
2859 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2860 struct sadb_comb *c;
2861 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2862 memset(c, 0, sizeof(*c));
2863 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2864 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2865 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2866 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2867 c->sadb_comb_hard_addtime = 24*60*60;
2868 c->sadb_comb_soft_addtime = 20*60*60;
2869 c->sadb_comb_hard_usetime = 8*60*60;
2870 c->sadb_comb_soft_usetime = 7*60*60;
2871 }
2872 }
2873 }
2874
2875 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2876 {
2877 struct sadb_prop *p;
2878 int i, k;
2879
2880 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2881 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2882 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2883 p->sadb_prop_replay = 32;
2884 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2885
2886 for (i=0; ; i++) {
2887 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2888 if (!ealg)
2889 break;
2890
2891 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2892 continue;
2893
2894 for (k = 1; ; k++) {
2895 struct sadb_comb *c;
2896 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2897 if (!aalg)
2898 break;
2899 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2900 continue;
2901 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2902 memset(c, 0, sizeof(*c));
2903 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2904 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2905 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2906 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2907 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2908 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2909 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2910 c->sadb_comb_hard_addtime = 24*60*60;
2911 c->sadb_comb_soft_addtime = 20*60*60;
2912 c->sadb_comb_hard_usetime = 8*60*60;
2913 c->sadb_comb_soft_usetime = 7*60*60;
2914 }
2915 }
2916 }
2917
2918 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2919 {
2920 return 0;
2921 }
2922
2923 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2924 {
2925 struct sk_buff *out_skb;
2926 struct sadb_msg *out_hdr;
2927 int hard;
2928 int hsc;
2929
2930 hard = c->data.hard;
2931 if (hard)
2932 hsc = 2;
2933 else
2934 hsc = 1;
2935
2936 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2937 if (IS_ERR(out_skb))
2938 return PTR_ERR(out_skb);
2939
2940 out_hdr = (struct sadb_msg *) out_skb->data;
2941 out_hdr->sadb_msg_version = PF_KEY_V2;
2942 out_hdr->sadb_msg_type = SADB_EXPIRE;
2943 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2944 out_hdr->sadb_msg_errno = 0;
2945 out_hdr->sadb_msg_reserved = 0;
2946 out_hdr->sadb_msg_seq = 0;
2947 out_hdr->sadb_msg_pid = 0;
2948
2949 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2950 return 0;
2951 }
2952
2953 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2954 {
2955 switch (c->event) {
2956 case XFRM_MSG_EXPIRE:
2957 return key_notify_sa_expire(x, c);
2958 case XFRM_MSG_DELSA:
2959 case XFRM_MSG_NEWSA:
2960 case XFRM_MSG_UPDSA:
2961 return key_notify_sa(x, c);
2962 case XFRM_MSG_FLUSHSA:
2963 return key_notify_sa_flush(c);
2964 case XFRM_MSG_NEWAE: /* not yet supported */
2965 break;
2966 default:
2967 printk("pfkey: Unknown SA event %d\n", c->event);
2968 break;
2969 }
2970
2971 return 0;
2972 }
2973
2974 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2975 {
2976 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2977 return 0;
2978
2979 switch (c->event) {
2980 case XFRM_MSG_POLEXPIRE:
2981 return key_notify_policy_expire(xp, c);
2982 case XFRM_MSG_DELPOLICY:
2983 case XFRM_MSG_NEWPOLICY:
2984 case XFRM_MSG_UPDPOLICY:
2985 return key_notify_policy(xp, dir, c);
2986 case XFRM_MSG_FLUSHPOLICY:
2987 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2988 break;
2989 return key_notify_policy_flush(c);
2990 default:
2991 printk("pfkey: Unknown policy event %d\n", c->event);
2992 break;
2993 }
2994
2995 return 0;
2996 }
2997
2998 static u32 get_acqseq(void)
2999 {
3000 u32 res;
3001 static u32 acqseq;
3002 static DEFINE_SPINLOCK(acqseq_lock);
3003
3004 spin_lock_bh(&acqseq_lock);
3005 res = (++acqseq ? : ++acqseq);
3006 spin_unlock_bh(&acqseq_lock);
3007 return res;
3008 }
3009
3010 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3011 {
3012 struct sk_buff *skb;
3013 struct sadb_msg *hdr;
3014 struct sadb_address *addr;
3015 struct sadb_x_policy *pol;
3016 struct sockaddr_in *sin;
3017 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3018 struct sockaddr_in6 *sin6;
3019 #endif
3020 int sockaddr_size;
3021 int size;
3022 struct sadb_x_sec_ctx *sec_ctx;
3023 struct xfrm_sec_ctx *xfrm_ctx;
3024 int ctx_size = 0;
3025
3026 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3027 if (!sockaddr_size)
3028 return -EINVAL;
3029
3030 size = sizeof(struct sadb_msg) +
3031 (sizeof(struct sadb_address) * 2) +
3032 (sockaddr_size * 2) +
3033 sizeof(struct sadb_x_policy);
3034
3035 if (x->id.proto == IPPROTO_AH)
3036 size += count_ah_combs(t);
3037 else if (x->id.proto == IPPROTO_ESP)
3038 size += count_esp_combs(t);
3039
3040 if ((xfrm_ctx = x->security)) {
3041 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3042 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3043 }
3044
3045 skb = alloc_skb(size + 16, GFP_ATOMIC);
3046 if (skb == NULL)
3047 return -ENOMEM;
3048
3049 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3050 hdr->sadb_msg_version = PF_KEY_V2;
3051 hdr->sadb_msg_type = SADB_ACQUIRE;
3052 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3053 hdr->sadb_msg_len = size / sizeof(uint64_t);
3054 hdr->sadb_msg_errno = 0;
3055 hdr->sadb_msg_reserved = 0;
3056 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3057 hdr->sadb_msg_pid = 0;
3058
3059 /* src address */
3060 addr = (struct sadb_address*) skb_put(skb,
3061 sizeof(struct sadb_address)+sockaddr_size);
3062 addr->sadb_address_len =
3063 (sizeof(struct sadb_address)+sockaddr_size)/
3064 sizeof(uint64_t);
3065 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3066 addr->sadb_address_proto = 0;
3067 addr->sadb_address_reserved = 0;
3068 if (x->props.family == AF_INET) {
3069 addr->sadb_address_prefixlen = 32;
3070
3071 sin = (struct sockaddr_in *) (addr + 1);
3072 sin->sin_family = AF_INET;
3073 sin->sin_addr.s_addr = x->props.saddr.a4;
3074 sin->sin_port = 0;
3075 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3076 }
3077 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3078 else if (x->props.family == AF_INET6) {
3079 addr->sadb_address_prefixlen = 128;
3080
3081 sin6 = (struct sockaddr_in6 *) (addr + 1);
3082 sin6->sin6_family = AF_INET6;
3083 sin6->sin6_port = 0;
3084 sin6->sin6_flowinfo = 0;
3085 memcpy(&sin6->sin6_addr,
3086 x->props.saddr.a6, sizeof(struct in6_addr));
3087 sin6->sin6_scope_id = 0;
3088 }
3089 #endif
3090 else
3091 BUG();
3092
3093 /* dst address */
3094 addr = (struct sadb_address*) skb_put(skb,
3095 sizeof(struct sadb_address)+sockaddr_size);
3096 addr->sadb_address_len =
3097 (sizeof(struct sadb_address)+sockaddr_size)/
3098 sizeof(uint64_t);
3099 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3100 addr->sadb_address_proto = 0;
3101 addr->sadb_address_reserved = 0;
3102 if (x->props.family == AF_INET) {
3103 addr->sadb_address_prefixlen = 32;
3104
3105 sin = (struct sockaddr_in *) (addr + 1);
3106 sin->sin_family = AF_INET;
3107 sin->sin_addr.s_addr = x->id.daddr.a4;
3108 sin->sin_port = 0;
3109 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3110 }
3111 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3112 else if (x->props.family == AF_INET6) {
3113 addr->sadb_address_prefixlen = 128;
3114
3115 sin6 = (struct sockaddr_in6 *) (addr + 1);
3116 sin6->sin6_family = AF_INET6;
3117 sin6->sin6_port = 0;
3118 sin6->sin6_flowinfo = 0;
3119 memcpy(&sin6->sin6_addr,
3120 x->id.daddr.a6, sizeof(struct in6_addr));
3121 sin6->sin6_scope_id = 0;
3122 }
3123 #endif
3124 else
3125 BUG();
3126
3127 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3128 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3129 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3130 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3131 pol->sadb_x_policy_dir = dir+1;
3132 pol->sadb_x_policy_id = xp->index;
3133
3134 /* Set sadb_comb's. */
3135 if (x->id.proto == IPPROTO_AH)
3136 dump_ah_combs(skb, t);
3137 else if (x->id.proto == IPPROTO_ESP)
3138 dump_esp_combs(skb, t);
3139
3140 /* security context */
3141 if (xfrm_ctx) {
3142 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3143 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3144 sec_ctx->sadb_x_sec_len =
3145 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3146 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3147 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3148 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3149 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3150 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3151 xfrm_ctx->ctx_len);
3152 }
3153
3154 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3155 }
3156
3157 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3158 u8 *data, int len, int *dir)
3159 {
3160 struct xfrm_policy *xp;
3161 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3162 struct sadb_x_sec_ctx *sec_ctx;
3163
3164 switch (sk->sk_family) {
3165 case AF_INET:
3166 if (opt != IP_IPSEC_POLICY) {
3167 *dir = -EOPNOTSUPP;
3168 return NULL;
3169 }
3170 break;
3171 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3172 case AF_INET6:
3173 if (opt != IPV6_IPSEC_POLICY) {
3174 *dir = -EOPNOTSUPP;
3175 return NULL;
3176 }
3177 break;
3178 #endif
3179 default:
3180 *dir = -EINVAL;
3181 return NULL;
3182 }
3183
3184 *dir = -EINVAL;
3185
3186 if (len < sizeof(struct sadb_x_policy) ||
3187 pol->sadb_x_policy_len*8 > len ||
3188 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3189 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3190 return NULL;
3191
3192 xp = xfrm_policy_alloc(GFP_ATOMIC);
3193 if (xp == NULL) {
3194 *dir = -ENOBUFS;
3195 return NULL;
3196 }
3197
3198 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3199 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3200
3201 xp->lft.soft_byte_limit = XFRM_INF;
3202 xp->lft.hard_byte_limit = XFRM_INF;
3203 xp->lft.soft_packet_limit = XFRM_INF;
3204 xp->lft.hard_packet_limit = XFRM_INF;
3205 xp->family = sk->sk_family;
3206
3207 xp->xfrm_nr = 0;
3208 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3209 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3210 goto out;
3211
3212 /* security context too */
3213 if (len >= (pol->sadb_x_policy_len*8 +
3214 sizeof(struct sadb_x_sec_ctx))) {
3215 char *p = (char *)pol;
3216 struct xfrm_user_sec_ctx *uctx;
3217
3218 p += pol->sadb_x_policy_len*8;
3219 sec_ctx = (struct sadb_x_sec_ctx *)p;
3220 if (len < pol->sadb_x_policy_len*8 +
3221 sec_ctx->sadb_x_sec_len) {
3222 *dir = -EINVAL;
3223 goto out;
3224 }
3225 if ((*dir = verify_sec_ctx_len(p)))
3226 goto out;
3227 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3228 *dir = security_xfrm_policy_alloc(xp, uctx);
3229 kfree(uctx);
3230
3231 if (*dir)
3232 goto out;
3233 }
3234
3235 *dir = pol->sadb_x_policy_dir-1;
3236 return xp;
3237
3238 out:
3239 xfrm_policy_destroy(xp);
3240 return NULL;
3241 }
3242
3243 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3244 {
3245 struct sk_buff *skb;
3246 struct sadb_msg *hdr;
3247 struct sadb_sa *sa;
3248 struct sadb_address *addr;
3249 struct sadb_x_nat_t_port *n_port;
3250 struct sockaddr_in *sin;
3251 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3252 struct sockaddr_in6 *sin6;
3253 #endif
3254 int sockaddr_size;
3255 int size;
3256 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3257 struct xfrm_encap_tmpl *natt = NULL;
3258
3259 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3260 if (!sockaddr_size)
3261 return -EINVAL;
3262
3263 if (!satype)
3264 return -EINVAL;
3265
3266 if (!x->encap)
3267 return -EINVAL;
3268
3269 natt = x->encap;
3270
3271 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3272 *
3273 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3274 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3275 */
3276
3277 size = sizeof(struct sadb_msg) +
3278 sizeof(struct sadb_sa) +
3279 (sizeof(struct sadb_address) * 2) +
3280 (sockaddr_size * 2) +
3281 (sizeof(struct sadb_x_nat_t_port) * 2);
3282
3283 skb = alloc_skb(size + 16, GFP_ATOMIC);
3284 if (skb == NULL)
3285 return -ENOMEM;
3286
3287 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3288 hdr->sadb_msg_version = PF_KEY_V2;
3289 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3290 hdr->sadb_msg_satype = satype;
3291 hdr->sadb_msg_len = size / sizeof(uint64_t);
3292 hdr->sadb_msg_errno = 0;
3293 hdr->sadb_msg_reserved = 0;
3294 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3295 hdr->sadb_msg_pid = 0;
3296
3297 /* SA */
3298 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3299 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3300 sa->sadb_sa_exttype = SADB_EXT_SA;
3301 sa->sadb_sa_spi = x->id.spi;
3302 sa->sadb_sa_replay = 0;
3303 sa->sadb_sa_state = 0;
3304 sa->sadb_sa_auth = 0;
3305 sa->sadb_sa_encrypt = 0;
3306 sa->sadb_sa_flags = 0;
3307
3308 /* ADDRESS_SRC (old addr) */
3309 addr = (struct sadb_address*)
3310 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3311 addr->sadb_address_len =
3312 (sizeof(struct sadb_address)+sockaddr_size)/
3313 sizeof(uint64_t);
3314 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3315 addr->sadb_address_proto = 0;
3316 addr->sadb_address_reserved = 0;
3317 if (x->props.family == AF_INET) {
3318 addr->sadb_address_prefixlen = 32;
3319
3320 sin = (struct sockaddr_in *) (addr + 1);
3321 sin->sin_family = AF_INET;
3322 sin->sin_addr.s_addr = x->props.saddr.a4;
3323 sin->sin_port = 0;
3324 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3325 }
3326 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3327 else if (x->props.family == AF_INET6) {
3328 addr->sadb_address_prefixlen = 128;
3329
3330 sin6 = (struct sockaddr_in6 *) (addr + 1);
3331 sin6->sin6_family = AF_INET6;
3332 sin6->sin6_port = 0;
3333 sin6->sin6_flowinfo = 0;
3334 memcpy(&sin6->sin6_addr,
3335 x->props.saddr.a6, sizeof(struct in6_addr));
3336 sin6->sin6_scope_id = 0;
3337 }
3338 #endif
3339 else
3340 BUG();
3341
3342 /* NAT_T_SPORT (old port) */
3343 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3344 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3345 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3346 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3347 n_port->sadb_x_nat_t_port_reserved = 0;
3348
3349 /* ADDRESS_DST (new addr) */
3350 addr = (struct sadb_address*)
3351 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3352 addr->sadb_address_len =
3353 (sizeof(struct sadb_address)+sockaddr_size)/
3354 sizeof(uint64_t);
3355 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3356 addr->sadb_address_proto = 0;
3357 addr->sadb_address_reserved = 0;
3358 if (x->props.family == AF_INET) {
3359 addr->sadb_address_prefixlen = 32;
3360
3361 sin = (struct sockaddr_in *) (addr + 1);
3362 sin->sin_family = AF_INET;
3363 sin->sin_addr.s_addr = ipaddr->a4;
3364 sin->sin_port = 0;
3365 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3366 }
3367 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3368 else if (x->props.family == AF_INET6) {
3369 addr->sadb_address_prefixlen = 128;
3370
3371 sin6 = (struct sockaddr_in6 *) (addr + 1);
3372 sin6->sin6_family = AF_INET6;
3373 sin6->sin6_port = 0;
3374 sin6->sin6_flowinfo = 0;
3375 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3376 sin6->sin6_scope_id = 0;
3377 }
3378 #endif
3379 else
3380 BUG();
3381
3382 /* NAT_T_DPORT (new port) */
3383 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3384 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3385 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3386 n_port->sadb_x_nat_t_port_port = sport;
3387 n_port->sadb_x_nat_t_port_reserved = 0;
3388
3389 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3390 }
3391
3392 #ifdef CONFIG_NET_KEY_MIGRATE
3393 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3394 struct xfrm_selector *sel)
3395 {
3396 struct sadb_address *addr;
3397 struct sockaddr_in *sin;
3398 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3399 struct sockaddr_in6 *sin6;
3400 #endif
3401 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3402 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3403 addr->sadb_address_exttype = type;
3404 addr->sadb_address_proto = sel->proto;
3405 addr->sadb_address_reserved = 0;
3406
3407 switch (type) {
3408 case SADB_EXT_ADDRESS_SRC:
3409 if (sel->family == AF_INET) {
3410 addr->sadb_address_prefixlen = sel->prefixlen_s;
3411 sin = (struct sockaddr_in *)(addr + 1);
3412 sin->sin_family = AF_INET;
3413 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3414 sizeof(sin->sin_addr.s_addr));
3415 sin->sin_port = 0;
3416 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3417 }
3418 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3419 else if (sel->family == AF_INET6) {
3420 addr->sadb_address_prefixlen = sel->prefixlen_s;
3421 sin6 = (struct sockaddr_in6 *)(addr + 1);
3422 sin6->sin6_family = AF_INET6;
3423 sin6->sin6_port = 0;
3424 sin6->sin6_flowinfo = 0;
3425 sin6->sin6_scope_id = 0;
3426 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3427 sizeof(sin6->sin6_addr.s6_addr));
3428 }
3429 #endif
3430 break;
3431 case SADB_EXT_ADDRESS_DST:
3432 if (sel->family == AF_INET) {
3433 addr->sadb_address_prefixlen = sel->prefixlen_d;
3434 sin = (struct sockaddr_in *)(addr + 1);
3435 sin->sin_family = AF_INET;
3436 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3437 sizeof(sin->sin_addr.s_addr));
3438 sin->sin_port = 0;
3439 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3440 }
3441 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3442 else if (sel->family == AF_INET6) {
3443 addr->sadb_address_prefixlen = sel->prefixlen_d;
3444 sin6 = (struct sockaddr_in6 *)(addr + 1);
3445 sin6->sin6_family = AF_INET6;
3446 sin6->sin6_port = 0;
3447 sin6->sin6_flowinfo = 0;
3448 sin6->sin6_scope_id = 0;
3449 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3450 sizeof(sin6->sin6_addr.s6_addr));
3451 }
3452 #endif
3453 break;
3454 default:
3455 return -EINVAL;
3456 }
3457
3458 return 0;
3459 }
3460
3461 static int set_ipsecrequest(struct sk_buff *skb,
3462 uint8_t proto, uint8_t mode, int level,
3463 uint32_t reqid, uint8_t family,
3464 xfrm_address_t *src, xfrm_address_t *dst)
3465 {
3466 struct sadb_x_ipsecrequest *rq;
3467 struct sockaddr_in *sin;
3468 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3469 struct sockaddr_in6 *sin6;
3470 #endif
3471 int size_req;
3472
3473 size_req = sizeof(struct sadb_x_ipsecrequest) +
3474 pfkey_sockaddr_pair_size(family);
3475
3476 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3477 memset(rq, 0, size_req);
3478 rq->sadb_x_ipsecrequest_len = size_req;
3479 rq->sadb_x_ipsecrequest_proto = proto;
3480 rq->sadb_x_ipsecrequest_mode = mode;
3481 rq->sadb_x_ipsecrequest_level = level;
3482 rq->sadb_x_ipsecrequest_reqid = reqid;
3483
3484 switch (family) {
3485 case AF_INET:
3486 sin = (struct sockaddr_in *)(rq + 1);
3487 sin->sin_family = AF_INET;
3488 memcpy(&sin->sin_addr.s_addr, src,
3489 sizeof(sin->sin_addr.s_addr));
3490 sin++;
3491 sin->sin_family = AF_INET;
3492 memcpy(&sin->sin_addr.s_addr, dst,
3493 sizeof(sin->sin_addr.s_addr));
3494 break;
3495 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3496 case AF_INET6:
3497 sin6 = (struct sockaddr_in6 *)(rq + 1);
3498 sin6->sin6_family = AF_INET6;
3499 sin6->sin6_port = 0;
3500 sin6->sin6_flowinfo = 0;
3501 sin6->sin6_scope_id = 0;
3502 memcpy(&sin6->sin6_addr.s6_addr, src,
3503 sizeof(sin6->sin6_addr.s6_addr));
3504 sin6++;
3505 sin6->sin6_family = AF_INET6;
3506 sin6->sin6_port = 0;
3507 sin6->sin6_flowinfo = 0;
3508 sin6->sin6_scope_id = 0;
3509 memcpy(&sin6->sin6_addr.s6_addr, dst,
3510 sizeof(sin6->sin6_addr.s6_addr));
3511 break;
3512 #endif
3513 default:
3514 return -EINVAL;
3515 }
3516
3517 return 0;
3518 }
3519 #endif
3520
3521 #ifdef CONFIG_NET_KEY_MIGRATE
3522 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3523 struct xfrm_migrate *m, int num_bundles)
3524 {
3525 int i;
3526 int sasize_sel;
3527 int size = 0;
3528 int size_pol = 0;
3529 struct sk_buff *skb;
3530 struct sadb_msg *hdr;
3531 struct sadb_x_policy *pol;
3532 struct xfrm_migrate *mp;
3533
3534 if (type != XFRM_POLICY_TYPE_MAIN)
3535 return 0;
3536
3537 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3538 return -EINVAL;
3539
3540 /* selector */
3541 sasize_sel = pfkey_sockaddr_size(sel->family);
3542 if (!sasize_sel)
3543 return -EINVAL;
3544 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3545
3546 /* policy info */
3547 size_pol += sizeof(struct sadb_x_policy);
3548
3549 /* ipsecrequests */
3550 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3551 /* old locator pair */
3552 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3553 pfkey_sockaddr_pair_size(mp->old_family);
3554 /* new locator pair */
3555 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3556 pfkey_sockaddr_pair_size(mp->new_family);
3557 }
3558
3559 size += sizeof(struct sadb_msg) + size_pol;
3560
3561 /* alloc buffer */
3562 skb = alloc_skb(size, GFP_ATOMIC);
3563 if (skb == NULL)
3564 return -ENOMEM;
3565
3566 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3567 hdr->sadb_msg_version = PF_KEY_V2;
3568 hdr->sadb_msg_type = SADB_X_MIGRATE;
3569 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3570 hdr->sadb_msg_len = size / 8;
3571 hdr->sadb_msg_errno = 0;
3572 hdr->sadb_msg_reserved = 0;
3573 hdr->sadb_msg_seq = 0;
3574 hdr->sadb_msg_pid = 0;
3575
3576 /* selector src */
3577 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3578
3579 /* selector dst */
3580 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3581
3582 /* policy information */
3583 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3584 pol->sadb_x_policy_len = size_pol / 8;
3585 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3586 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3587 pol->sadb_x_policy_dir = dir + 1;
3588 pol->sadb_x_policy_id = 0;
3589 pol->sadb_x_policy_priority = 0;
3590
3591 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3592 /* old ipsecrequest */
3593 int mode = pfkey_mode_from_xfrm(mp->mode);
3594 if (mode < 0)
3595 goto err;
3596 if (set_ipsecrequest(skb, mp->proto, mode,
3597 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3598 mp->reqid, mp->old_family,
3599 &mp->old_saddr, &mp->old_daddr) < 0)
3600 goto err;
3601
3602 /* new ipsecrequest */
3603 if (set_ipsecrequest(skb, mp->proto, mode,
3604 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3605 mp->reqid, mp->new_family,
3606 &mp->new_saddr, &mp->new_daddr) < 0)
3607 goto err;
3608 }
3609
3610 /* broadcast migrate message to sockets */
3611 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3612
3613 return 0;
3614
3615 err:
3616 kfree_skb(skb);
3617 return -EINVAL;
3618 }
3619 #else
3620 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3621 struct xfrm_migrate *m, int num_bundles)
3622 {
3623 return -ENOPROTOOPT;
3624 }
3625 #endif
3626
3627 static int pfkey_sendmsg(struct kiocb *kiocb,
3628 struct socket *sock, struct msghdr *msg, size_t len)
3629 {
3630 struct sock *sk = sock->sk;
3631 struct sk_buff *skb = NULL;
3632 struct sadb_msg *hdr = NULL;
3633 int err;
3634
3635 err = -EOPNOTSUPP;
3636 if (msg->msg_flags & MSG_OOB)
3637 goto out;
3638
3639 err = -EMSGSIZE;
3640 if ((unsigned)len > sk->sk_sndbuf - 32)
3641 goto out;
3642
3643 err = -ENOBUFS;
3644 skb = alloc_skb(len, GFP_KERNEL);
3645 if (skb == NULL)
3646 goto out;
3647
3648 err = -EFAULT;
3649 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3650 goto out;
3651
3652 hdr = pfkey_get_base_msg(skb, &err);
3653 if (!hdr)
3654 goto out;
3655
3656 mutex_lock(&xfrm_cfg_mutex);
3657 err = pfkey_process(sk, skb, hdr);
3658 mutex_unlock(&xfrm_cfg_mutex);
3659
3660 out:
3661 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3662 err = 0;
3663 if (skb)
3664 kfree_skb(skb);
3665
3666 return err ? : len;
3667 }
3668
3669 static int pfkey_recvmsg(struct kiocb *kiocb,
3670 struct socket *sock, struct msghdr *msg, size_t len,
3671 int flags)
3672 {
3673 struct sock *sk = sock->sk;
3674 struct sk_buff *skb;
3675 int copied, err;
3676
3677 err = -EINVAL;
3678 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3679 goto out;
3680
3681 msg->msg_namelen = 0;
3682 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3683 if (skb == NULL)
3684 goto out;
3685
3686 copied = skb->len;
3687 if (copied > len) {
3688 msg->msg_flags |= MSG_TRUNC;
3689 copied = len;
3690 }
3691
3692 skb_reset_transport_header(skb);
3693 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3694 if (err)
3695 goto out_free;
3696
3697 sock_recv_timestamp(msg, sk, skb);
3698
3699 err = (flags & MSG_TRUNC) ? skb->len : copied;
3700
3701 out_free:
3702 skb_free_datagram(sk, skb);
3703 out:
3704 return err;
3705 }
3706
3707 static const struct proto_ops pfkey_ops = {
3708 .family = PF_KEY,
3709 .owner = THIS_MODULE,
3710 /* Operations that make no sense on pfkey sockets. */
3711 .bind = sock_no_bind,
3712 .connect = sock_no_connect,
3713 .socketpair = sock_no_socketpair,
3714 .accept = sock_no_accept,
3715 .getname = sock_no_getname,
3716 .ioctl = sock_no_ioctl,
3717 .listen = sock_no_listen,
3718 .shutdown = sock_no_shutdown,
3719 .setsockopt = sock_no_setsockopt,
3720 .getsockopt = sock_no_getsockopt,
3721 .mmap = sock_no_mmap,
3722 .sendpage = sock_no_sendpage,
3723
3724 /* Now the operations that really occur. */
3725 .release = pfkey_release,
3726 .poll = datagram_poll,
3727 .sendmsg = pfkey_sendmsg,
3728 .recvmsg = pfkey_recvmsg,
3729 };
3730
3731 static struct net_proto_family pfkey_family_ops = {
3732 .family = PF_KEY,
3733 .create = pfkey_create,
3734 .owner = THIS_MODULE,
3735 };
3736
3737 #ifdef CONFIG_PROC_FS
3738 static int pfkey_seq_show(struct seq_file *f, void *v)
3739 {
3740 struct sock *s;
3741
3742 s = (struct sock *)v;
3743 if (v == SEQ_START_TOKEN)
3744 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3745 else
3746 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
3747 s,
3748 atomic_read(&s->sk_refcnt),
3749 atomic_read(&s->sk_rmem_alloc),
3750 atomic_read(&s->sk_wmem_alloc),
3751 sock_i_uid(s),
3752 sock_i_ino(s)
3753 );
3754 return 0;
3755 }
3756
3757 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3758 {
3759 struct sock *s;
3760 struct hlist_node *node;
3761 loff_t pos = *ppos;
3762
3763 read_lock(&pfkey_table_lock);
3764 if (pos == 0)
3765 return SEQ_START_TOKEN;
3766
3767 sk_for_each(s, node, &pfkey_table)
3768 if (pos-- == 1)
3769 return s;
3770
3771 return NULL;
3772 }
3773
3774 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3775 {
3776 ++*ppos;
3777 return (v == SEQ_START_TOKEN) ?
3778 sk_head(&pfkey_table) :
3779 sk_next((struct sock *)v);
3780 }
3781
3782 static void pfkey_seq_stop(struct seq_file *f, void *v)
3783 {
3784 read_unlock(&pfkey_table_lock);
3785 }
3786
3787 static struct seq_operations pfkey_seq_ops = {
3788 .start = pfkey_seq_start,
3789 .next = pfkey_seq_next,
3790 .stop = pfkey_seq_stop,
3791 .show = pfkey_seq_show,
3792 };
3793
3794 static int pfkey_seq_open(struct inode *inode, struct file *file)
3795 {
3796 return seq_open(file, &pfkey_seq_ops);
3797 }
3798
3799 static struct file_operations pfkey_proc_ops = {
3800 .open = pfkey_seq_open,
3801 .read = seq_read,
3802 .llseek = seq_lseek,
3803 .release = seq_release,
3804 };
3805
3806 static int pfkey_init_proc(void)
3807 {
3808 struct proc_dir_entry *e;
3809
3810 e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops);
3811 if (e == NULL)
3812 return -ENOMEM;
3813
3814 return 0;
3815 }
3816
3817 static void pfkey_exit_proc(void)
3818 {
3819 proc_net_remove(&init_net, "pfkey");
3820 }
3821 #else
3822 static inline int pfkey_init_proc(void)
3823 {
3824 return 0;
3825 }
3826
3827 static inline void pfkey_exit_proc(void)
3828 {
3829 }
3830 #endif
3831
3832 static struct xfrm_mgr pfkeyv2_mgr =
3833 {
3834 .id = "pfkeyv2",
3835 .notify = pfkey_send_notify,
3836 .acquire = pfkey_send_acquire,
3837 .compile_policy = pfkey_compile_policy,
3838 .new_mapping = pfkey_send_new_mapping,
3839 .notify_policy = pfkey_send_policy_notify,
3840 .migrate = pfkey_send_migrate,
3841 };
3842
3843 static void __exit ipsec_pfkey_exit(void)
3844 {
3845 xfrm_unregister_km(&pfkeyv2_mgr);
3846 pfkey_exit_proc();
3847 sock_unregister(PF_KEY);
3848 proto_unregister(&key_proto);
3849 }
3850
3851 static int __init ipsec_pfkey_init(void)
3852 {
3853 int err = proto_register(&key_proto, 0);
3854
3855 if (err != 0)
3856 goto out;
3857
3858 err = sock_register(&pfkey_family_ops);
3859 if (err != 0)
3860 goto out_unregister_key_proto;
3861 err = pfkey_init_proc();
3862 if (err != 0)
3863 goto out_sock_unregister;
3864 err = xfrm_register_km(&pfkeyv2_mgr);
3865 if (err != 0)
3866 goto out_remove_proc_entry;
3867 out:
3868 return err;
3869 out_remove_proc_entry:
3870 pfkey_exit_proc();
3871 out_sock_unregister:
3872 sock_unregister(PF_KEY);
3873 out_unregister_key_proto:
3874 proto_unregister(&key_proto);
3875 goto out;
3876 }
3877
3878 module_init(ipsec_pfkey_init);
3879 module_exit(ipsec_pfkey_exit);
3880 MODULE_LICENSE("GPL");
3881 MODULE_ALIAS_NETPROTO(PF_KEY);
linux-next