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[IPV4]: Correct rp_filter help text.
[linux-2.6/verdex.git] / net / key / af_key.c
bloba99444142dc78f726cbf12b15d0f2f7e81ab6301
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/xfrm.h>
30 #include <linux/audit.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 socket *sock, int protocol)
140 {
141 struct sock *sk;
142 int err;
143
144 if (!capable(CAP_NET_ADMIN))
145 return -EPERM;
146 if (sock->type != SOCK_RAW)
147 return -ESOCKTNOSUPPORT;
148 if (protocol != PF_KEY_V2)
149 return -EPROTONOSUPPORT;
150
151 err = -ENOMEM;
152 sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
153 if (sk == NULL)
154 goto out;
155
156 sock->ops = &pfkey_ops;
157 sock_init_data(sock, sk);
158
159 sk->sk_family = PF_KEY;
160 sk->sk_destruct = pfkey_sock_destruct;
161
162 atomic_inc(&pfkey_socks_nr);
163
164 pfkey_insert(sk);
165
166 return 0;
167 out:
168 return err;
169 }
170
171 static int pfkey_release(struct socket *sock)
172 {
173 struct sock *sk = sock->sk;
174
175 if (!sk)
176 return 0;
177
178 pfkey_remove(sk);
179
180 sock_orphan(sk);
181 sock->sk = NULL;
182 skb_queue_purge(&sk->sk_write_queue);
183 sock_put(sk);
184
185 return 0;
186 }
187
188 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
189 gfp_t allocation, struct sock *sk)
190 {
191 int err = -ENOBUFS;
192
193 sock_hold(sk);
194 if (*skb2 == NULL) {
195 if (atomic_read(&skb->users) != 1) {
196 *skb2 = skb_clone(skb, allocation);
197 } else {
198 *skb2 = skb;
199 atomic_inc(&skb->users);
200 }
201 }
202 if (*skb2 != NULL) {
203 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
204 skb_orphan(*skb2);
205 skb_set_owner_r(*skb2, sk);
206 skb_queue_tail(&sk->sk_receive_queue, *skb2);
207 sk->sk_data_ready(sk, (*skb2)->len);
208 *skb2 = NULL;
209 err = 0;
210 }
211 }
212 sock_put(sk);
213 return err;
214 }
215
216 /* Send SKB to all pfkey sockets matching selected criteria. */
217 #define BROADCAST_ALL 0
218 #define BROADCAST_ONE 1
219 #define BROADCAST_REGISTERED 2
220 #define BROADCAST_PROMISC_ONLY 4
221 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
222 int broadcast_flags, struct sock *one_sk)
223 {
224 struct sock *sk;
225 struct hlist_node *node;
226 struct sk_buff *skb2 = NULL;
227 int err = -ESRCH;
228
229 /* XXX Do we need something like netlink_overrun? I think
230 * XXX PF_KEY socket apps will not mind current behavior.
231 */
232 if (!skb)
233 return -ENOMEM;
234
235 pfkey_lock_table();
236 sk_for_each(sk, node, &pfkey_table) {
237 struct pfkey_sock *pfk = pfkey_sk(sk);
238 int err2;
239
240 /* Yes, it means that if you are meant to receive this
241 * pfkey message you receive it twice as promiscuous
242 * socket.
243 */
244 if (pfk->promisc)
245 pfkey_broadcast_one(skb, &skb2, allocation, sk);
246
247 /* the exact target will be processed later */
248 if (sk == one_sk)
249 continue;
250 if (broadcast_flags != BROADCAST_ALL) {
251 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
252 continue;
253 if ((broadcast_flags & BROADCAST_REGISTERED) &&
254 !pfk->registered)
255 continue;
256 if (broadcast_flags & BROADCAST_ONE)
257 continue;
258 }
259
260 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
261
262 /* Error is cleare after succecful sending to at least one
263 * registered KM */
264 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
265 err = err2;
266 }
267 pfkey_unlock_table();
268
269 if (one_sk != NULL)
270 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
271
272 if (skb2)
273 kfree_skb(skb2);
274 kfree_skb(skb);
275 return err;
276 }
277
278 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
279 {
280 *new = *orig;
281 }
282
283 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
284 {
285 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
286 struct sadb_msg *hdr;
287
288 if (!skb)
289 return -ENOBUFS;
290
291 /* Woe be to the platform trying to support PFKEY yet
292 * having normal errnos outside the 1-255 range, inclusive.
293 */
294 err = -err;
295 if (err == ERESTARTSYS ||
296 err == ERESTARTNOHAND ||
297 err == ERESTARTNOINTR)
298 err = EINTR;
299 if (err >= 512)
300 err = EINVAL;
301 BUG_ON(err <= 0 || err >= 256);
302
303 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
304 pfkey_hdr_dup(hdr, orig);
305 hdr->sadb_msg_errno = (uint8_t) err;
306 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
307 sizeof(uint64_t));
308
309 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
310
311 return 0;
312 }
313
314 static u8 sadb_ext_min_len[] = {
315 [SADB_EXT_RESERVED] = (u8) 0,
316 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
317 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
318 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
319 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
320 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
321 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
322 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
323 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
324 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
325 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
326 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
327 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
328 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
329 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
330 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
331 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
332 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
333 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
334 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
335 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
336 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
337 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
338 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
339 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
340 };
341
342 /* Verify sadb_address_{len,prefixlen} against sa_family. */
343 static int verify_address_len(void *p)
344 {
345 struct sadb_address *sp = p;
346 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
347 struct sockaddr_in *sin;
348 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
349 struct sockaddr_in6 *sin6;
350 #endif
351 int len;
352
353 switch (addr->sa_family) {
354 case AF_INET:
355 len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
356 len /= sizeof(uint64_t);
357 if (sp->sadb_address_len != len ||
358 sp->sadb_address_prefixlen > 32)
359 return -EINVAL;
360 break;
361 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
362 case AF_INET6:
363 len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
364 len /= sizeof(uint64_t);
365 if (sp->sadb_address_len != len ||
366 sp->sadb_address_prefixlen > 128)
367 return -EINVAL;
368 break;
369 #endif
370 default:
371 /* It is user using kernel to keep track of security
372 * associations for another protocol, such as
373 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
374 * lengths.
375 *
376 * XXX Actually, association/policy database is not yet
377 * XXX able to cope with arbitrary sockaddr families.
378 * XXX When it can, remove this -EINVAL. -DaveM
379 */
380 return -EINVAL;
381 break;
382 }
383
384 return 0;
385 }
386
387 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
388 {
389 int len = 0;
390
391 len += sizeof(struct sadb_x_sec_ctx);
392 len += sec_ctx->sadb_x_ctx_len;
393 len += sizeof(uint64_t) - 1;
394 len /= sizeof(uint64_t);
395
396 return len;
397 }
398
399 static inline int verify_sec_ctx_len(void *p)
400 {
401 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
402 int len;
403
404 if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
405 return -EINVAL;
406
407 len = pfkey_sec_ctx_len(sec_ctx);
408
409 if (sec_ctx->sadb_x_sec_len != len)
410 return -EINVAL;
411
412 return 0;
413 }
414
415 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
416 {
417 struct xfrm_user_sec_ctx *uctx = NULL;
418 int ctx_size = sec_ctx->sadb_x_ctx_len;
419
420 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
421
422 if (!uctx)
423 return NULL;
424
425 uctx->len = pfkey_sec_ctx_len(sec_ctx);
426 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
427 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
428 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
429 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
430 memcpy(uctx + 1, sec_ctx + 1,
431 uctx->ctx_len);
432
433 return uctx;
434 }
435
436 static int present_and_same_family(struct sadb_address *src,
437 struct sadb_address *dst)
438 {
439 struct sockaddr *s_addr, *d_addr;
440
441 if (!src || !dst)
442 return 0;
443
444 s_addr = (struct sockaddr *)(src + 1);
445 d_addr = (struct sockaddr *)(dst + 1);
446 if (s_addr->sa_family != d_addr->sa_family)
447 return 0;
448 if (s_addr->sa_family != AF_INET
449 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
450 && s_addr->sa_family != AF_INET6
451 #endif
452 )
453 return 0;
454
455 return 1;
456 }
457
458 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
459 {
460 char *p = (char *) hdr;
461 int len = skb->len;
462
463 len -= sizeof(*hdr);
464 p += sizeof(*hdr);
465 while (len > 0) {
466 struct sadb_ext *ehdr = (struct sadb_ext *) p;
467 uint16_t ext_type;
468 int ext_len;
469
470 ext_len = ehdr->sadb_ext_len;
471 ext_len *= sizeof(uint64_t);
472 ext_type = ehdr->sadb_ext_type;
473 if (ext_len < sizeof(uint64_t) ||
474 ext_len > len ||
475 ext_type == SADB_EXT_RESERVED)
476 return -EINVAL;
477
478 if (ext_type <= SADB_EXT_MAX) {
479 int min = (int) sadb_ext_min_len[ext_type];
480 if (ext_len < min)
481 return -EINVAL;
482 if (ext_hdrs[ext_type-1] != NULL)
483 return -EINVAL;
484 if (ext_type == SADB_EXT_ADDRESS_SRC ||
485 ext_type == SADB_EXT_ADDRESS_DST ||
486 ext_type == SADB_EXT_ADDRESS_PROXY ||
487 ext_type == SADB_X_EXT_NAT_T_OA) {
488 if (verify_address_len(p))
489 return -EINVAL;
490 }
491 if (ext_type == SADB_X_EXT_SEC_CTX) {
492 if (verify_sec_ctx_len(p))
493 return -EINVAL;
494 }
495 ext_hdrs[ext_type-1] = p;
496 }
497 p += ext_len;
498 len -= ext_len;
499 }
500
501 return 0;
502 }
503
504 static uint16_t
505 pfkey_satype2proto(uint8_t satype)
506 {
507 switch (satype) {
508 case SADB_SATYPE_UNSPEC:
509 return IPSEC_PROTO_ANY;
510 case SADB_SATYPE_AH:
511 return IPPROTO_AH;
512 case SADB_SATYPE_ESP:
513 return IPPROTO_ESP;
514 case SADB_X_SATYPE_IPCOMP:
515 return IPPROTO_COMP;
516 break;
517 default:
518 return 0;
519 }
520 /* NOTREACHED */
521 }
522
523 static uint8_t
524 pfkey_proto2satype(uint16_t proto)
525 {
526 switch (proto) {
527 case IPPROTO_AH:
528 return SADB_SATYPE_AH;
529 case IPPROTO_ESP:
530 return SADB_SATYPE_ESP;
531 case IPPROTO_COMP:
532 return SADB_X_SATYPE_IPCOMP;
533 break;
534 default:
535 return 0;
536 }
537 /* NOTREACHED */
538 }
539
540 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
541 * say specifically 'just raw sockets' as we encode them as 255.
542 */
543
544 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
545 {
546 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
547 }
548
549 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
550 {
551 return (proto ? proto : IPSEC_PROTO_ANY);
552 }
553
554 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
555 xfrm_address_t *xaddr)
556 {
557 switch (((struct sockaddr*)(addr + 1))->sa_family) {
558 case AF_INET:
559 xaddr->a4 =
560 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
561 return AF_INET;
562 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
563 case AF_INET6:
564 memcpy(xaddr->a6,
565 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
566 sizeof(struct in6_addr));
567 return AF_INET6;
568 #endif
569 default:
570 return 0;
571 }
572 /* NOTREACHED */
573 }
574
575 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
576 {
577 struct sadb_sa *sa;
578 struct sadb_address *addr;
579 uint16_t proto;
580 unsigned short family;
581 xfrm_address_t *xaddr;
582
583 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
584 if (sa == NULL)
585 return NULL;
586
587 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
588 if (proto == 0)
589 return NULL;
590
591 /* sadb_address_len should be checked by caller */
592 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
593 if (addr == NULL)
594 return NULL;
595
596 family = ((struct sockaddr *)(addr + 1))->sa_family;
597 switch (family) {
598 case AF_INET:
599 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
600 break;
601 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
602 case AF_INET6:
603 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
604 break;
605 #endif
606 default:
607 xaddr = NULL;
608 }
609
610 if (!xaddr)
611 return NULL;
612
613 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
614 }
615
616 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
617 static int
618 pfkey_sockaddr_size(sa_family_t family)
619 {
620 switch (family) {
621 case AF_INET:
622 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
623 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
624 case AF_INET6:
625 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
626 #endif
627 default:
628 return 0;
629 }
630 /* NOTREACHED */
631 }
632
633 static inline int pfkey_mode_from_xfrm(int mode)
634 {
635 switch(mode) {
636 case XFRM_MODE_TRANSPORT:
637 return IPSEC_MODE_TRANSPORT;
638 case XFRM_MODE_TUNNEL:
639 return IPSEC_MODE_TUNNEL;
640 case XFRM_MODE_BEET:
641 return IPSEC_MODE_BEET;
642 default:
643 return -1;
644 }
645 }
646
647 static inline int pfkey_mode_to_xfrm(int mode)
648 {
649 switch(mode) {
650 case IPSEC_MODE_ANY: /*XXX*/
651 case IPSEC_MODE_TRANSPORT:
652 return XFRM_MODE_TRANSPORT;
653 case IPSEC_MODE_TUNNEL:
654 return XFRM_MODE_TUNNEL;
655 case IPSEC_MODE_BEET:
656 return XFRM_MODE_BEET;
657 default:
658 return -1;
659 }
660 }
661
662 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
663 {
664 struct sk_buff *skb;
665 struct sadb_msg *hdr;
666 struct sadb_sa *sa;
667 struct sadb_lifetime *lifetime;
668 struct sadb_address *addr;
669 struct sadb_key *key;
670 struct sadb_x_sa2 *sa2;
671 struct sockaddr_in *sin;
672 struct sadb_x_sec_ctx *sec_ctx;
673 struct xfrm_sec_ctx *xfrm_ctx;
674 int ctx_size = 0;
675 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
676 struct sockaddr_in6 *sin6;
677 #endif
678 int size;
679 int auth_key_size = 0;
680 int encrypt_key_size = 0;
681 int sockaddr_size;
682 struct xfrm_encap_tmpl *natt = NULL;
683 int mode;
684
685 /* address family check */
686 sockaddr_size = pfkey_sockaddr_size(x->props.family);
687 if (!sockaddr_size)
688 return ERR_PTR(-EINVAL);
689
690 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
691 key(AE), (identity(SD),) (sensitivity)> */
692 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
693 sizeof(struct sadb_lifetime) +
694 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
695 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
696 sizeof(struct sadb_address)*2 +
697 sockaddr_size*2 +
698 sizeof(struct sadb_x_sa2);
699
700 if ((xfrm_ctx = x->security)) {
701 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
702 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
703 }
704
705 /* identity & sensitivity */
706
707 if ((x->props.family == AF_INET &&
708 x->sel.saddr.a4 != x->props.saddr.a4)
709 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
710 || (x->props.family == AF_INET6 &&
711 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
712 #endif
713 )
714 size += sizeof(struct sadb_address) + sockaddr_size;
715
716 if (add_keys) {
717 if (x->aalg && x->aalg->alg_key_len) {
718 auth_key_size =
719 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
720 size += sizeof(struct sadb_key) + auth_key_size;
721 }
722 if (x->ealg && x->ealg->alg_key_len) {
723 encrypt_key_size =
724 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
725 size += sizeof(struct sadb_key) + encrypt_key_size;
726 }
727 }
728 if (x->encap)
729 natt = x->encap;
730
731 if (natt && natt->encap_type) {
732 size += sizeof(struct sadb_x_nat_t_type);
733 size += sizeof(struct sadb_x_nat_t_port);
734 size += sizeof(struct sadb_x_nat_t_port);
735 }
736
737 skb = alloc_skb(size + 16, GFP_ATOMIC);
738 if (skb == NULL)
739 return ERR_PTR(-ENOBUFS);
740
741 /* call should fill header later */
742 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
743 memset(hdr, 0, size); /* XXX do we need this ? */
744 hdr->sadb_msg_len = size / sizeof(uint64_t);
745
746 /* sa */
747 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
748 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
749 sa->sadb_sa_exttype = SADB_EXT_SA;
750 sa->sadb_sa_spi = x->id.spi;
751 sa->sadb_sa_replay = x->props.replay_window;
752 switch (x->km.state) {
753 case XFRM_STATE_VALID:
754 sa->sadb_sa_state = x->km.dying ?
755 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
756 break;
757 case XFRM_STATE_ACQ:
758 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
759 break;
760 default:
761 sa->sadb_sa_state = SADB_SASTATE_DEAD;
762 break;
763 }
764 sa->sadb_sa_auth = 0;
765 if (x->aalg) {
766 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
767 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
768 }
769 sa->sadb_sa_encrypt = 0;
770 BUG_ON(x->ealg && x->calg);
771 if (x->ealg) {
772 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
773 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
774 }
775 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
776 if (x->calg) {
777 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
778 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
779 }
780
781 sa->sadb_sa_flags = 0;
782 if (x->props.flags & XFRM_STATE_NOECN)
783 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
784 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
785 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
786 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
787 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
788
789 /* hard time */
790 if (hsc & 2) {
791 lifetime = (struct sadb_lifetime *) skb_put(skb,
792 sizeof(struct sadb_lifetime));
793 lifetime->sadb_lifetime_len =
794 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
795 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
796 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
797 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
798 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
799 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
800 }
801 /* soft time */
802 if (hsc & 1) {
803 lifetime = (struct sadb_lifetime *) skb_put(skb,
804 sizeof(struct sadb_lifetime));
805 lifetime->sadb_lifetime_len =
806 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
807 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
808 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
809 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
810 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
811 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
812 }
813 /* current time */
814 lifetime = (struct sadb_lifetime *) skb_put(skb,
815 sizeof(struct sadb_lifetime));
816 lifetime->sadb_lifetime_len =
817 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
818 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
819 lifetime->sadb_lifetime_allocations = x->curlft.packets;
820 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
821 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
822 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
823 /* src address */
824 addr = (struct sadb_address*) skb_put(skb,
825 sizeof(struct sadb_address)+sockaddr_size);
826 addr->sadb_address_len =
827 (sizeof(struct sadb_address)+sockaddr_size)/
828 sizeof(uint64_t);
829 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
830 /* "if the ports are non-zero, then the sadb_address_proto field,
831 normally zero, MUST be filled in with the transport
832 protocol's number." - RFC2367 */
833 addr->sadb_address_proto = 0;
834 addr->sadb_address_reserved = 0;
835 if (x->props.family == AF_INET) {
836 addr->sadb_address_prefixlen = 32;
837
838 sin = (struct sockaddr_in *) (addr + 1);
839 sin->sin_family = AF_INET;
840 sin->sin_addr.s_addr = x->props.saddr.a4;
841 sin->sin_port = 0;
842 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
843 }
844 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
845 else if (x->props.family == AF_INET6) {
846 addr->sadb_address_prefixlen = 128;
847
848 sin6 = (struct sockaddr_in6 *) (addr + 1);
849 sin6->sin6_family = AF_INET6;
850 sin6->sin6_port = 0;
851 sin6->sin6_flowinfo = 0;
852 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
853 sizeof(struct in6_addr));
854 sin6->sin6_scope_id = 0;
855 }
856 #endif
857 else
858 BUG();
859
860 /* dst address */
861 addr = (struct sadb_address*) skb_put(skb,
862 sizeof(struct sadb_address)+sockaddr_size);
863 addr->sadb_address_len =
864 (sizeof(struct sadb_address)+sockaddr_size)/
865 sizeof(uint64_t);
866 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
867 addr->sadb_address_proto = 0;
868 addr->sadb_address_prefixlen = 32; /* XXX */
869 addr->sadb_address_reserved = 0;
870 if (x->props.family == AF_INET) {
871 sin = (struct sockaddr_in *) (addr + 1);
872 sin->sin_family = AF_INET;
873 sin->sin_addr.s_addr = x->id.daddr.a4;
874 sin->sin_port = 0;
875 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
876
877 if (x->sel.saddr.a4 != x->props.saddr.a4) {
878 addr = (struct sadb_address*) skb_put(skb,
879 sizeof(struct sadb_address)+sockaddr_size);
880 addr->sadb_address_len =
881 (sizeof(struct sadb_address)+sockaddr_size)/
882 sizeof(uint64_t);
883 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
884 addr->sadb_address_proto =
885 pfkey_proto_from_xfrm(x->sel.proto);
886 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
887 addr->sadb_address_reserved = 0;
888
889 sin = (struct sockaddr_in *) (addr + 1);
890 sin->sin_family = AF_INET;
891 sin->sin_addr.s_addr = x->sel.saddr.a4;
892 sin->sin_port = x->sel.sport;
893 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
894 }
895 }
896 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
897 else if (x->props.family == AF_INET6) {
898 addr->sadb_address_prefixlen = 128;
899
900 sin6 = (struct sockaddr_in6 *) (addr + 1);
901 sin6->sin6_family = AF_INET6;
902 sin6->sin6_port = 0;
903 sin6->sin6_flowinfo = 0;
904 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
905 sin6->sin6_scope_id = 0;
906
907 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
908 sizeof(struct in6_addr))) {
909 addr = (struct sadb_address *) skb_put(skb,
910 sizeof(struct sadb_address)+sockaddr_size);
911 addr->sadb_address_len =
912 (sizeof(struct sadb_address)+sockaddr_size)/
913 sizeof(uint64_t);
914 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
915 addr->sadb_address_proto =
916 pfkey_proto_from_xfrm(x->sel.proto);
917 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
918 addr->sadb_address_reserved = 0;
919
920 sin6 = (struct sockaddr_in6 *) (addr + 1);
921 sin6->sin6_family = AF_INET6;
922 sin6->sin6_port = x->sel.sport;
923 sin6->sin6_flowinfo = 0;
924 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
925 sizeof(struct in6_addr));
926 sin6->sin6_scope_id = 0;
927 }
928 }
929 #endif
930 else
931 BUG();
932
933 /* auth key */
934 if (add_keys && auth_key_size) {
935 key = (struct sadb_key *) skb_put(skb,
936 sizeof(struct sadb_key)+auth_key_size);
937 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
938 sizeof(uint64_t);
939 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
940 key->sadb_key_bits = x->aalg->alg_key_len;
941 key->sadb_key_reserved = 0;
942 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
943 }
944 /* encrypt key */
945 if (add_keys && encrypt_key_size) {
946 key = (struct sadb_key *) skb_put(skb,
947 sizeof(struct sadb_key)+encrypt_key_size);
948 key->sadb_key_len = (sizeof(struct sadb_key) +
949 encrypt_key_size) / sizeof(uint64_t);
950 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
951 key->sadb_key_bits = x->ealg->alg_key_len;
952 key->sadb_key_reserved = 0;
953 memcpy(key + 1, x->ealg->alg_key,
954 (x->ealg->alg_key_len+7)/8);
955 }
956
957 /* sa */
958 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
959 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
960 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
961 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
962 kfree_skb(skb);
963 return ERR_PTR(-EINVAL);
964 }
965 sa2->sadb_x_sa2_mode = mode;
966 sa2->sadb_x_sa2_reserved1 = 0;
967 sa2->sadb_x_sa2_reserved2 = 0;
968 sa2->sadb_x_sa2_sequence = 0;
969 sa2->sadb_x_sa2_reqid = x->props.reqid;
970
971 if (natt && natt->encap_type) {
972 struct sadb_x_nat_t_type *n_type;
973 struct sadb_x_nat_t_port *n_port;
974
975 /* type */
976 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
977 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
978 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
979 n_type->sadb_x_nat_t_type_type = natt->encap_type;
980 n_type->sadb_x_nat_t_type_reserved[0] = 0;
981 n_type->sadb_x_nat_t_type_reserved[1] = 0;
982 n_type->sadb_x_nat_t_type_reserved[2] = 0;
983
984 /* source port */
985 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
986 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
987 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
988 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
989 n_port->sadb_x_nat_t_port_reserved = 0;
990
991 /* dest port */
992 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
993 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
994 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
995 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
996 n_port->sadb_x_nat_t_port_reserved = 0;
997 }
998
999 /* security context */
1000 if (xfrm_ctx) {
1001 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1002 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1003 sec_ctx->sadb_x_sec_len =
1004 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1005 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1006 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1007 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1008 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1009 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1010 xfrm_ctx->ctx_len);
1011 }
1012
1013 return skb;
1014 }
1015
1016 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1017 void **ext_hdrs)
1018 {
1019 struct xfrm_state *x;
1020 struct sadb_lifetime *lifetime;
1021 struct sadb_sa *sa;
1022 struct sadb_key *key;
1023 struct sadb_x_sec_ctx *sec_ctx;
1024 uint16_t proto;
1025 int err;
1026
1027
1028 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1029 if (!sa ||
1030 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1031 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1032 return ERR_PTR(-EINVAL);
1033 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1034 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1035 return ERR_PTR(-EINVAL);
1036 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1037 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1038 return ERR_PTR(-EINVAL);
1039 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1040 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1041 return ERR_PTR(-EINVAL);
1042
1043 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1044 if (proto == 0)
1045 return ERR_PTR(-EINVAL);
1046
1047 /* default error is no buffer space */
1048 err = -ENOBUFS;
1049
1050 /* RFC2367:
1051
1052 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1053 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1054 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1055 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1056 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1057 not true.
1058
1059 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1060 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1061 */
1062 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1063 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1064 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1065 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1066 return ERR_PTR(-EINVAL);
1067 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1068 if (key != NULL &&
1069 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1070 ((key->sadb_key_bits+7) / 8 == 0 ||
1071 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1072 return ERR_PTR(-EINVAL);
1073 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1074 if (key != NULL &&
1075 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1076 ((key->sadb_key_bits+7) / 8 == 0 ||
1077 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1078 return ERR_PTR(-EINVAL);
1079
1080 x = xfrm_state_alloc();
1081 if (x == NULL)
1082 return ERR_PTR(-ENOBUFS);
1083
1084 x->id.proto = proto;
1085 x->id.spi = sa->sadb_sa_spi;
1086 x->props.replay_window = sa->sadb_sa_replay;
1087 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1088 x->props.flags |= XFRM_STATE_NOECN;
1089 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1090 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1091 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1092 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1093
1094 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1095 if (lifetime != NULL) {
1096 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1097 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1098 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1099 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1100 }
1101 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1102 if (lifetime != NULL) {
1103 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1104 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1105 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1106 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1107 }
1108
1109 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1110 if (sec_ctx != NULL) {
1111 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1112
1113 if (!uctx)
1114 goto out;
1115
1116 err = security_xfrm_state_alloc(x, uctx);
1117 kfree(uctx);
1118
1119 if (err)
1120 goto out;
1121 }
1122
1123 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1124 if (sa->sadb_sa_auth) {
1125 int keysize = 0;
1126 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1127 if (!a) {
1128 err = -ENOSYS;
1129 goto out;
1130 }
1131 if (key)
1132 keysize = (key->sadb_key_bits + 7) / 8;
1133 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1134 if (!x->aalg)
1135 goto out;
1136 strcpy(x->aalg->alg_name, a->name);
1137 x->aalg->alg_key_len = 0;
1138 if (key) {
1139 x->aalg->alg_key_len = key->sadb_key_bits;
1140 memcpy(x->aalg->alg_key, key+1, keysize);
1141 }
1142 x->props.aalgo = sa->sadb_sa_auth;
1143 /* x->algo.flags = sa->sadb_sa_flags; */
1144 }
1145 if (sa->sadb_sa_encrypt) {
1146 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1147 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1148 if (!a) {
1149 err = -ENOSYS;
1150 goto out;
1151 }
1152 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1153 if (!x->calg)
1154 goto out;
1155 strcpy(x->calg->alg_name, a->name);
1156 x->props.calgo = sa->sadb_sa_encrypt;
1157 } else {
1158 int keysize = 0;
1159 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1160 if (!a) {
1161 err = -ENOSYS;
1162 goto out;
1163 }
1164 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1165 if (key)
1166 keysize = (key->sadb_key_bits + 7) / 8;
1167 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1168 if (!x->ealg)
1169 goto out;
1170 strcpy(x->ealg->alg_name, a->name);
1171 x->ealg->alg_key_len = 0;
1172 if (key) {
1173 x->ealg->alg_key_len = key->sadb_key_bits;
1174 memcpy(x->ealg->alg_key, key+1, keysize);
1175 }
1176 x->props.ealgo = sa->sadb_sa_encrypt;
1177 }
1178 }
1179 /* x->algo.flags = sa->sadb_sa_flags; */
1180
1181 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1182 &x->props.saddr);
1183 if (!x->props.family) {
1184 err = -EAFNOSUPPORT;
1185 goto out;
1186 }
1187 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1188 &x->id.daddr);
1189
1190 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1191 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1192 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1193 if (mode < 0) {
1194 err = -EINVAL;
1195 goto out;
1196 }
1197 x->props.mode = mode;
1198 x->props.reqid = sa2->sadb_x_sa2_reqid;
1199 }
1200
1201 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1202 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1203
1204 /* Nobody uses this, but we try. */
1205 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1206 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1207 }
1208
1209 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1210 struct sadb_x_nat_t_type* n_type;
1211 struct xfrm_encap_tmpl *natt;
1212
1213 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1214 if (!x->encap)
1215 goto out;
1216
1217 natt = x->encap;
1218 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1219 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1220
1221 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1222 struct sadb_x_nat_t_port* n_port =
1223 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1224 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1225 }
1226 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1227 struct sadb_x_nat_t_port* n_port =
1228 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1229 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1230 }
1231 }
1232
1233 err = xfrm_init_state(x);
1234 if (err)
1235 goto out;
1236
1237 x->km.seq = hdr->sadb_msg_seq;
1238 return x;
1239
1240 out:
1241 x->km.state = XFRM_STATE_DEAD;
1242 xfrm_state_put(x);
1243 return ERR_PTR(err);
1244 }
1245
1246 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1247 {
1248 return -EOPNOTSUPP;
1249 }
1250
1251 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1252 {
1253 struct sk_buff *resp_skb;
1254 struct sadb_x_sa2 *sa2;
1255 struct sadb_address *saddr, *daddr;
1256 struct sadb_msg *out_hdr;
1257 struct xfrm_state *x = NULL;
1258 int mode;
1259 u32 reqid;
1260 u8 proto;
1261 unsigned short family;
1262 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1263
1264 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1265 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1266 return -EINVAL;
1267
1268 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1269 if (proto == 0)
1270 return -EINVAL;
1271
1272 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1273 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1274 if (mode < 0)
1275 return -EINVAL;
1276 reqid = sa2->sadb_x_sa2_reqid;
1277 } else {
1278 mode = 0;
1279 reqid = 0;
1280 }
1281
1282 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1283 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1284
1285 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1286 switch (family) {
1287 case AF_INET:
1288 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1289 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1290 break;
1291 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1292 case AF_INET6:
1293 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1294 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1295 break;
1296 #endif
1297 }
1298
1299 if (hdr->sadb_msg_seq) {
1300 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1301 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1302 xfrm_state_put(x);
1303 x = NULL;
1304 }
1305 }
1306
1307 if (!x)
1308 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1309
1310 if (x == NULL)
1311 return -ENOENT;
1312
1313 resp_skb = ERR_PTR(-ENOENT);
1314
1315 spin_lock_bh(&x->lock);
1316 if (x->km.state != XFRM_STATE_DEAD) {
1317 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1318 u32 min_spi, max_spi;
1319
1320 if (range != NULL) {
1321 min_spi = range->sadb_spirange_min;
1322 max_spi = range->sadb_spirange_max;
1323 } else {
1324 min_spi = 0x100;
1325 max_spi = 0x0fffffff;
1326 }
1327 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1328 if (x->id.spi)
1329 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1330 }
1331 spin_unlock_bh(&x->lock);
1332
1333 if (IS_ERR(resp_skb)) {
1334 xfrm_state_put(x);
1335 return PTR_ERR(resp_skb);
1336 }
1337
1338 out_hdr = (struct sadb_msg *) resp_skb->data;
1339 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1340 out_hdr->sadb_msg_type = SADB_GETSPI;
1341 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1342 out_hdr->sadb_msg_errno = 0;
1343 out_hdr->sadb_msg_reserved = 0;
1344 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1345 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1346
1347 xfrm_state_put(x);
1348
1349 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1350
1351 return 0;
1352 }
1353
1354 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1355 {
1356 struct xfrm_state *x;
1357
1358 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1359 return -EOPNOTSUPP;
1360
1361 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1362 return 0;
1363
1364 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1365 if (x == NULL)
1366 return 0;
1367
1368 spin_lock_bh(&x->lock);
1369 if (x->km.state == XFRM_STATE_ACQ) {
1370 x->km.state = XFRM_STATE_ERROR;
1371 wake_up(&km_waitq);
1372 }
1373 spin_unlock_bh(&x->lock);
1374 xfrm_state_put(x);
1375 return 0;
1376 }
1377
1378 static inline int event2poltype(int event)
1379 {
1380 switch (event) {
1381 case XFRM_MSG_DELPOLICY:
1382 return SADB_X_SPDDELETE;
1383 case XFRM_MSG_NEWPOLICY:
1384 return SADB_X_SPDADD;
1385 case XFRM_MSG_UPDPOLICY:
1386 return SADB_X_SPDUPDATE;
1387 case XFRM_MSG_POLEXPIRE:
1388 // return SADB_X_SPDEXPIRE;
1389 default:
1390 printk("pfkey: Unknown policy event %d\n", event);
1391 break;
1392 }
1393
1394 return 0;
1395 }
1396
1397 static inline int event2keytype(int event)
1398 {
1399 switch (event) {
1400 case XFRM_MSG_DELSA:
1401 return SADB_DELETE;
1402 case XFRM_MSG_NEWSA:
1403 return SADB_ADD;
1404 case XFRM_MSG_UPDSA:
1405 return SADB_UPDATE;
1406 case XFRM_MSG_EXPIRE:
1407 return SADB_EXPIRE;
1408 default:
1409 printk("pfkey: Unknown SA event %d\n", event);
1410 break;
1411 }
1412
1413 return 0;
1414 }
1415
1416 /* ADD/UPD/DEL */
1417 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1418 {
1419 struct sk_buff *skb;
1420 struct sadb_msg *hdr;
1421 int hsc = 3;
1422
1423 if (c->event == XFRM_MSG_DELSA)
1424 hsc = 0;
1425
1426 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1427
1428 if (IS_ERR(skb))
1429 return PTR_ERR(skb);
1430
1431 hdr = (struct sadb_msg *) skb->data;
1432 hdr->sadb_msg_version = PF_KEY_V2;
1433 hdr->sadb_msg_type = event2keytype(c->event);
1434 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1435 hdr->sadb_msg_errno = 0;
1436 hdr->sadb_msg_reserved = 0;
1437 hdr->sadb_msg_seq = c->seq;
1438 hdr->sadb_msg_pid = c->pid;
1439
1440 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1441
1442 return 0;
1443 }
1444
1445 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1446 {
1447 struct xfrm_state *x;
1448 int err;
1449 struct km_event c;
1450
1451 xfrm_probe_algs();
1452
1453 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1454 if (IS_ERR(x))
1455 return PTR_ERR(x);
1456
1457 xfrm_state_hold(x);
1458 if (hdr->sadb_msg_type == SADB_ADD)
1459 err = xfrm_state_add(x);
1460 else
1461 err = xfrm_state_update(x);
1462
1463 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1464 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
1465
1466 if (err < 0) {
1467 x->km.state = XFRM_STATE_DEAD;
1468 __xfrm_state_put(x);
1469 goto out;
1470 }
1471
1472 if (hdr->sadb_msg_type == SADB_ADD)
1473 c.event = XFRM_MSG_NEWSA;
1474 else
1475 c.event = XFRM_MSG_UPDSA;
1476 c.seq = hdr->sadb_msg_seq;
1477 c.pid = hdr->sadb_msg_pid;
1478 km_state_notify(x, &c);
1479 out:
1480 xfrm_state_put(x);
1481 return err;
1482 }
1483
1484 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1485 {
1486 struct xfrm_state *x;
1487 struct km_event c;
1488 int err;
1489
1490 if (!ext_hdrs[SADB_EXT_SA-1] ||
1491 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1492 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1493 return -EINVAL;
1494
1495 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1496 if (x == NULL)
1497 return -ESRCH;
1498
1499 if ((err = security_xfrm_state_delete(x)))
1500 goto out;
1501
1502 if (xfrm_state_kern(x)) {
1503 err = -EPERM;
1504 goto out;
1505 }
1506
1507 err = xfrm_state_delete(x);
1508
1509 if (err < 0)
1510 goto out;
1511
1512 c.seq = hdr->sadb_msg_seq;
1513 c.pid = hdr->sadb_msg_pid;
1514 c.event = XFRM_MSG_DELSA;
1515 km_state_notify(x, &c);
1516 out:
1517 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1518 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
1519 xfrm_state_put(x);
1520
1521 return err;
1522 }
1523
1524 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1525 {
1526 __u8 proto;
1527 struct sk_buff *out_skb;
1528 struct sadb_msg *out_hdr;
1529 struct xfrm_state *x;
1530
1531 if (!ext_hdrs[SADB_EXT_SA-1] ||
1532 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1533 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1534 return -EINVAL;
1535
1536 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1537 if (x == NULL)
1538 return -ESRCH;
1539
1540 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1541 proto = x->id.proto;
1542 xfrm_state_put(x);
1543 if (IS_ERR(out_skb))
1544 return PTR_ERR(out_skb);
1545
1546 out_hdr = (struct sadb_msg *) out_skb->data;
1547 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1548 out_hdr->sadb_msg_type = SADB_DUMP;
1549 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1550 out_hdr->sadb_msg_errno = 0;
1551 out_hdr->sadb_msg_reserved = 0;
1552 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1553 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1554 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1555
1556 return 0;
1557 }
1558
1559 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1560 gfp_t allocation)
1561 {
1562 struct sk_buff *skb;
1563 struct sadb_msg *hdr;
1564 int len, auth_len, enc_len, i;
1565
1566 auth_len = xfrm_count_auth_supported();
1567 if (auth_len) {
1568 auth_len *= sizeof(struct sadb_alg);
1569 auth_len += sizeof(struct sadb_supported);
1570 }
1571
1572 enc_len = xfrm_count_enc_supported();
1573 if (enc_len) {
1574 enc_len *= sizeof(struct sadb_alg);
1575 enc_len += sizeof(struct sadb_supported);
1576 }
1577
1578 len = enc_len + auth_len + sizeof(struct sadb_msg);
1579
1580 skb = alloc_skb(len + 16, allocation);
1581 if (!skb)
1582 goto out_put_algs;
1583
1584 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1585 pfkey_hdr_dup(hdr, orig);
1586 hdr->sadb_msg_errno = 0;
1587 hdr->sadb_msg_len = len / sizeof(uint64_t);
1588
1589 if (auth_len) {
1590 struct sadb_supported *sp;
1591 struct sadb_alg *ap;
1592
1593 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1594 ap = (struct sadb_alg *) (sp + 1);
1595
1596 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1597 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1598
1599 for (i = 0; ; i++) {
1600 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1601 if (!aalg)
1602 break;
1603 if (aalg->available)
1604 *ap++ = aalg->desc;
1605 }
1606 }
1607
1608 if (enc_len) {
1609 struct sadb_supported *sp;
1610 struct sadb_alg *ap;
1611
1612 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1613 ap = (struct sadb_alg *) (sp + 1);
1614
1615 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1616 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1617
1618 for (i = 0; ; i++) {
1619 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1620 if (!ealg)
1621 break;
1622 if (ealg->available)
1623 *ap++ = ealg->desc;
1624 }
1625 }
1626
1627 out_put_algs:
1628 return skb;
1629 }
1630
1631 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1632 {
1633 struct pfkey_sock *pfk = pfkey_sk(sk);
1634 struct sk_buff *supp_skb;
1635
1636 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1637 return -EINVAL;
1638
1639 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1640 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1641 return -EEXIST;
1642 pfk->registered |= (1<<hdr->sadb_msg_satype);
1643 }
1644
1645 xfrm_probe_algs();
1646
1647 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1648 if (!supp_skb) {
1649 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1650 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1651
1652 return -ENOBUFS;
1653 }
1654
1655 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1656
1657 return 0;
1658 }
1659
1660 static int key_notify_sa_flush(struct km_event *c)
1661 {
1662 struct sk_buff *skb;
1663 struct sadb_msg *hdr;
1664
1665 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1666 if (!skb)
1667 return -ENOBUFS;
1668 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1669 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1670 hdr->sadb_msg_type = SADB_FLUSH;
1671 hdr->sadb_msg_seq = c->seq;
1672 hdr->sadb_msg_pid = c->pid;
1673 hdr->sadb_msg_version = PF_KEY_V2;
1674 hdr->sadb_msg_errno = (uint8_t) 0;
1675 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1676
1677 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1678
1679 return 0;
1680 }
1681
1682 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1683 {
1684 unsigned proto;
1685 struct km_event c;
1686 struct xfrm_audit audit_info;
1687
1688 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1689 if (proto == 0)
1690 return -EINVAL;
1691
1692 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1693 audit_info.secid = 0;
1694 xfrm_state_flush(proto, &audit_info);
1695 c.data.proto = proto;
1696 c.seq = hdr->sadb_msg_seq;
1697 c.pid = hdr->sadb_msg_pid;
1698 c.event = XFRM_MSG_FLUSHSA;
1699 km_state_notify(NULL, &c);
1700
1701 return 0;
1702 }
1703
1704 struct pfkey_dump_data
1705 {
1706 struct sk_buff *skb;
1707 struct sadb_msg *hdr;
1708 struct sock *sk;
1709 };
1710
1711 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1712 {
1713 struct pfkey_dump_data *data = ptr;
1714 struct sk_buff *out_skb;
1715 struct sadb_msg *out_hdr;
1716
1717 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1718 if (IS_ERR(out_skb))
1719 return PTR_ERR(out_skb);
1720
1721 out_hdr = (struct sadb_msg *) out_skb->data;
1722 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1723 out_hdr->sadb_msg_type = SADB_DUMP;
1724 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1725 out_hdr->sadb_msg_errno = 0;
1726 out_hdr->sadb_msg_reserved = 0;
1727 out_hdr->sadb_msg_seq = count;
1728 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1729 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1730 return 0;
1731 }
1732
1733 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1734 {
1735 u8 proto;
1736 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1737
1738 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1739 if (proto == 0)
1740 return -EINVAL;
1741
1742 return xfrm_state_walk(proto, dump_sa, &data);
1743 }
1744
1745 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1746 {
1747 struct pfkey_sock *pfk = pfkey_sk(sk);
1748 int satype = hdr->sadb_msg_satype;
1749
1750 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1751 /* XXX we mangle packet... */
1752 hdr->sadb_msg_errno = 0;
1753 if (satype != 0 && satype != 1)
1754 return -EINVAL;
1755 pfk->promisc = satype;
1756 }
1757 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1758 return 0;
1759 }
1760
1761 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1762 {
1763 int i;
1764 u32 reqid = *(u32*)ptr;
1765
1766 for (i=0; i<xp->xfrm_nr; i++) {
1767 if (xp->xfrm_vec[i].reqid == reqid)
1768 return -EEXIST;
1769 }
1770 return 0;
1771 }
1772
1773 static u32 gen_reqid(void)
1774 {
1775 u32 start;
1776 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1777
1778 start = reqid;
1779 do {
1780 ++reqid;
1781 if (reqid == 0)
1782 reqid = IPSEC_MANUAL_REQID_MAX+1;
1783 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1784 (void*)&reqid) != -EEXIST)
1785 return reqid;
1786 } while (reqid != start);
1787 return 0;
1788 }
1789
1790 static int
1791 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1792 {
1793 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1794 struct sockaddr_in *sin;
1795 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1796 struct sockaddr_in6 *sin6;
1797 #endif
1798 int mode;
1799
1800 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1801 return -ELOOP;
1802
1803 if (rq->sadb_x_ipsecrequest_mode == 0)
1804 return -EINVAL;
1805
1806 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1807 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1808 return -EINVAL;
1809 t->mode = mode;
1810 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1811 t->optional = 1;
1812 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1813 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1814 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1815 t->reqid = 0;
1816 if (!t->reqid && !(t->reqid = gen_reqid()))
1817 return -ENOBUFS;
1818 }
1819
1820 /* addresses present only in tunnel mode */
1821 if (t->mode == XFRM_MODE_TUNNEL) {
1822 struct sockaddr *sa;
1823 sa = (struct sockaddr *)(rq+1);
1824 switch(sa->sa_family) {
1825 case AF_INET:
1826 sin = (struct sockaddr_in*)sa;
1827 t->saddr.a4 = sin->sin_addr.s_addr;
1828 sin++;
1829 if (sin->sin_family != AF_INET)
1830 return -EINVAL;
1831 t->id.daddr.a4 = sin->sin_addr.s_addr;
1832 break;
1833 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1834 case AF_INET6:
1835 sin6 = (struct sockaddr_in6*)sa;
1836 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1837 sin6++;
1838 if (sin6->sin6_family != AF_INET6)
1839 return -EINVAL;
1840 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1841 break;
1842 #endif
1843 default:
1844 return -EINVAL;
1845 }
1846 t->encap_family = sa->sa_family;
1847 } else
1848 t->encap_family = xp->family;
1849
1850 /* No way to set this via kame pfkey */
1851 t->aalgos = t->ealgos = t->calgos = ~0;
1852 xp->xfrm_nr++;
1853 return 0;
1854 }
1855
1856 static int
1857 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1858 {
1859 int err;
1860 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1861 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1862
1863 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1864 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1865 return err;
1866 len -= rq->sadb_x_ipsecrequest_len;
1867 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1868 }
1869 return 0;
1870 }
1871
1872 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1873 {
1874 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1875
1876 if (xfrm_ctx) {
1877 int len = sizeof(struct sadb_x_sec_ctx);
1878 len += xfrm_ctx->ctx_len;
1879 return PFKEY_ALIGN8(len);
1880 }
1881 return 0;
1882 }
1883
1884 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1885 {
1886 struct xfrm_tmpl *t;
1887 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1888 int socklen = 0;
1889 int i;
1890
1891 for (i=0; i<xp->xfrm_nr; i++) {
1892 t = xp->xfrm_vec + i;
1893 socklen += (t->encap_family == AF_INET ?
1894 sizeof(struct sockaddr_in) :
1895 sizeof(struct sockaddr_in6));
1896 }
1897
1898 return sizeof(struct sadb_msg) +
1899 (sizeof(struct sadb_lifetime) * 3) +
1900 (sizeof(struct sadb_address) * 2) +
1901 (sockaddr_size * 2) +
1902 sizeof(struct sadb_x_policy) +
1903 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1904 (socklen * 2) +
1905 pfkey_xfrm_policy2sec_ctx_size(xp);
1906 }
1907
1908 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1909 {
1910 struct sk_buff *skb;
1911 int size;
1912
1913 size = pfkey_xfrm_policy2msg_size(xp);
1914
1915 skb = alloc_skb(size + 16, GFP_ATOMIC);
1916 if (skb == NULL)
1917 return ERR_PTR(-ENOBUFS);
1918
1919 return skb;
1920 }
1921
1922 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1923 {
1924 struct sadb_msg *hdr;
1925 struct sadb_address *addr;
1926 struct sadb_lifetime *lifetime;
1927 struct sadb_x_policy *pol;
1928 struct sockaddr_in *sin;
1929 struct sadb_x_sec_ctx *sec_ctx;
1930 struct xfrm_sec_ctx *xfrm_ctx;
1931 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1932 struct sockaddr_in6 *sin6;
1933 #endif
1934 int i;
1935 int size;
1936 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1937 int socklen = (xp->family == AF_INET ?
1938 sizeof(struct sockaddr_in) :
1939 sizeof(struct sockaddr_in6));
1940
1941 size = pfkey_xfrm_policy2msg_size(xp);
1942
1943 /* call should fill header later */
1944 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1945 memset(hdr, 0, size); /* XXX do we need this ? */
1946
1947 /* src address */
1948 addr = (struct sadb_address*) skb_put(skb,
1949 sizeof(struct sadb_address)+sockaddr_size);
1950 addr->sadb_address_len =
1951 (sizeof(struct sadb_address)+sockaddr_size)/
1952 sizeof(uint64_t);
1953 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1954 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1955 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1956 addr->sadb_address_reserved = 0;
1957 /* src address */
1958 if (xp->family == AF_INET) {
1959 sin = (struct sockaddr_in *) (addr + 1);
1960 sin->sin_family = AF_INET;
1961 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1962 sin->sin_port = xp->selector.sport;
1963 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1964 }
1965 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1966 else if (xp->family == AF_INET6) {
1967 sin6 = (struct sockaddr_in6 *) (addr + 1);
1968 sin6->sin6_family = AF_INET6;
1969 sin6->sin6_port = xp->selector.sport;
1970 sin6->sin6_flowinfo = 0;
1971 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1972 sizeof(struct in6_addr));
1973 sin6->sin6_scope_id = 0;
1974 }
1975 #endif
1976 else
1977 BUG();
1978
1979 /* dst address */
1980 addr = (struct sadb_address*) skb_put(skb,
1981 sizeof(struct sadb_address)+sockaddr_size);
1982 addr->sadb_address_len =
1983 (sizeof(struct sadb_address)+sockaddr_size)/
1984 sizeof(uint64_t);
1985 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1986 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1987 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1988 addr->sadb_address_reserved = 0;
1989 if (xp->family == AF_INET) {
1990 sin = (struct sockaddr_in *) (addr + 1);
1991 sin->sin_family = AF_INET;
1992 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1993 sin->sin_port = xp->selector.dport;
1994 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1995 }
1996 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1997 else if (xp->family == AF_INET6) {
1998 sin6 = (struct sockaddr_in6 *) (addr + 1);
1999 sin6->sin6_family = AF_INET6;
2000 sin6->sin6_port = xp->selector.dport;
2001 sin6->sin6_flowinfo = 0;
2002 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2003 sizeof(struct in6_addr));
2004 sin6->sin6_scope_id = 0;
2005 }
2006 #endif
2007 else
2008 BUG();
2009
2010 /* hard time */
2011 lifetime = (struct sadb_lifetime *) skb_put(skb,
2012 sizeof(struct sadb_lifetime));
2013 lifetime->sadb_lifetime_len =
2014 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2015 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2016 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2017 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2018 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2019 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2020 /* soft time */
2021 lifetime = (struct sadb_lifetime *) skb_put(skb,
2022 sizeof(struct sadb_lifetime));
2023 lifetime->sadb_lifetime_len =
2024 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2025 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2026 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2027 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2028 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2029 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2030 /* current time */
2031 lifetime = (struct sadb_lifetime *) skb_put(skb,
2032 sizeof(struct sadb_lifetime));
2033 lifetime->sadb_lifetime_len =
2034 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2035 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2036 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2037 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2038 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2039 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2040
2041 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2042 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2043 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2044 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2045 if (xp->action == XFRM_POLICY_ALLOW) {
2046 if (xp->xfrm_nr)
2047 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2048 else
2049 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2050 }
2051 pol->sadb_x_policy_dir = dir+1;
2052 pol->sadb_x_policy_id = xp->index;
2053 pol->sadb_x_policy_priority = xp->priority;
2054
2055 for (i=0; i<xp->xfrm_nr; i++) {
2056 struct sadb_x_ipsecrequest *rq;
2057 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2058 int req_size;
2059 int mode;
2060
2061 req_size = sizeof(struct sadb_x_ipsecrequest);
2062 if (t->mode == XFRM_MODE_TUNNEL)
2063 req_size += ((t->encap_family == AF_INET ?
2064 sizeof(struct sockaddr_in) :
2065 sizeof(struct sockaddr_in6)) * 2);
2066 else
2067 size -= 2*socklen;
2068 rq = (void*)skb_put(skb, req_size);
2069 pol->sadb_x_policy_len += req_size/8;
2070 memset(rq, 0, sizeof(*rq));
2071 rq->sadb_x_ipsecrequest_len = req_size;
2072 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2073 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2074 return -EINVAL;
2075 rq->sadb_x_ipsecrequest_mode = mode;
2076 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2077 if (t->reqid)
2078 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2079 if (t->optional)
2080 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2081 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2082 if (t->mode == XFRM_MODE_TUNNEL) {
2083 switch (t->encap_family) {
2084 case AF_INET:
2085 sin = (void*)(rq+1);
2086 sin->sin_family = AF_INET;
2087 sin->sin_addr.s_addr = t->saddr.a4;
2088 sin->sin_port = 0;
2089 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2090 sin++;
2091 sin->sin_family = AF_INET;
2092 sin->sin_addr.s_addr = t->id.daddr.a4;
2093 sin->sin_port = 0;
2094 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2095 break;
2096 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2097 case AF_INET6:
2098 sin6 = (void*)(rq+1);
2099 sin6->sin6_family = AF_INET6;
2100 sin6->sin6_port = 0;
2101 sin6->sin6_flowinfo = 0;
2102 memcpy(&sin6->sin6_addr, t->saddr.a6,
2103 sizeof(struct in6_addr));
2104 sin6->sin6_scope_id = 0;
2105
2106 sin6++;
2107 sin6->sin6_family = AF_INET6;
2108 sin6->sin6_port = 0;
2109 sin6->sin6_flowinfo = 0;
2110 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2111 sizeof(struct in6_addr));
2112 sin6->sin6_scope_id = 0;
2113 break;
2114 #endif
2115 default:
2116 break;
2117 }
2118 }
2119 }
2120
2121 /* security context */
2122 if ((xfrm_ctx = xp->security)) {
2123 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2124
2125 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2126 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2127 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2128 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2129 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2130 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2131 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2132 xfrm_ctx->ctx_len);
2133 }
2134
2135 hdr->sadb_msg_len = size / sizeof(uint64_t);
2136 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2137
2138 return 0;
2139 }
2140
2141 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2142 {
2143 struct sk_buff *out_skb;
2144 struct sadb_msg *out_hdr;
2145 int err;
2146
2147 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2148 if (IS_ERR(out_skb)) {
2149 err = PTR_ERR(out_skb);
2150 goto out;
2151 }
2152 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2153 if (err < 0)
2154 return err;
2155
2156 out_hdr = (struct sadb_msg *) out_skb->data;
2157 out_hdr->sadb_msg_version = PF_KEY_V2;
2158
2159 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2160 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2161 else
2162 out_hdr->sadb_msg_type = event2poltype(c->event);
2163 out_hdr->sadb_msg_errno = 0;
2164 out_hdr->sadb_msg_seq = c->seq;
2165 out_hdr->sadb_msg_pid = c->pid;
2166 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2167 out:
2168 return 0;
2169
2170 }
2171
2172 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2173 {
2174 int err = 0;
2175 struct sadb_lifetime *lifetime;
2176 struct sadb_address *sa;
2177 struct sadb_x_policy *pol;
2178 struct xfrm_policy *xp;
2179 struct km_event c;
2180 struct sadb_x_sec_ctx *sec_ctx;
2181
2182 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2183 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2184 !ext_hdrs[SADB_X_EXT_POLICY-1])
2185 return -EINVAL;
2186
2187 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2188 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2189 return -EINVAL;
2190 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2191 return -EINVAL;
2192
2193 xp = xfrm_policy_alloc(GFP_KERNEL);
2194 if (xp == NULL)
2195 return -ENOBUFS;
2196
2197 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2198 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2199 xp->priority = pol->sadb_x_policy_priority;
2200
2201 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2202 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2203 if (!xp->family) {
2204 err = -EINVAL;
2205 goto out;
2206 }
2207 xp->selector.family = xp->family;
2208 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2209 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2210 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2211 if (xp->selector.sport)
2212 xp->selector.sport_mask = htons(0xffff);
2213
2214 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2215 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2216 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2217
2218 /* Amusing, we set this twice. KAME apps appear to set same value
2219 * in both addresses.
2220 */
2221 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2222
2223 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2224 if (xp->selector.dport)
2225 xp->selector.dport_mask = htons(0xffff);
2226
2227 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2228 if (sec_ctx != NULL) {
2229 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2230
2231 if (!uctx) {
2232 err = -ENOBUFS;
2233 goto out;
2234 }
2235
2236 err = security_xfrm_policy_alloc(xp, uctx);
2237 kfree(uctx);
2238
2239 if (err)
2240 goto out;
2241 }
2242
2243 xp->lft.soft_byte_limit = XFRM_INF;
2244 xp->lft.hard_byte_limit = XFRM_INF;
2245 xp->lft.soft_packet_limit = XFRM_INF;
2246 xp->lft.hard_packet_limit = XFRM_INF;
2247 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2248 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2249 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2250 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2251 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2252 }
2253 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2254 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2255 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2256 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2257 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2258 }
2259 xp->xfrm_nr = 0;
2260 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2261 (err = parse_ipsecrequests(xp, pol)) < 0)
2262 goto out;
2263
2264 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2265 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2266
2267 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2268 AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2269
2270 if (err)
2271 goto out;
2272
2273 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2274 c.event = XFRM_MSG_UPDPOLICY;
2275 else
2276 c.event = XFRM_MSG_NEWPOLICY;
2277
2278 c.seq = hdr->sadb_msg_seq;
2279 c.pid = hdr->sadb_msg_pid;
2280
2281 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2282 xfrm_pol_put(xp);
2283 return 0;
2284
2285 out:
2286 security_xfrm_policy_free(xp);
2287 kfree(xp);
2288 return err;
2289 }
2290
2291 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2292 {
2293 int err;
2294 struct sadb_address *sa;
2295 struct sadb_x_policy *pol;
2296 struct xfrm_policy *xp, tmp;
2297 struct xfrm_selector sel;
2298 struct km_event c;
2299 struct sadb_x_sec_ctx *sec_ctx;
2300
2301 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2302 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2303 !ext_hdrs[SADB_X_EXT_POLICY-1])
2304 return -EINVAL;
2305
2306 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2307 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2308 return -EINVAL;
2309
2310 memset(&sel, 0, sizeof(sel));
2311
2312 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2313 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2314 sel.prefixlen_s = sa->sadb_address_prefixlen;
2315 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2316 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2317 if (sel.sport)
2318 sel.sport_mask = htons(0xffff);
2319
2320 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2321 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2322 sel.prefixlen_d = sa->sadb_address_prefixlen;
2323 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325 if (sel.dport)
2326 sel.dport_mask = htons(0xffff);
2327
2328 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2329 memset(&tmp, 0, sizeof(struct xfrm_policy));
2330
2331 if (sec_ctx != NULL) {
2332 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2333
2334 if (!uctx)
2335 return -ENOMEM;
2336
2337 err = security_xfrm_policy_alloc(&tmp, uctx);
2338 kfree(uctx);
2339
2340 if (err)
2341 return err;
2342 }
2343
2344 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2345 &sel, tmp.security, 1, &err);
2346 security_xfrm_policy_free(&tmp);
2347
2348 if (xp == NULL)
2349 return -ENOENT;
2350
2351 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2352 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2353
2354 if (err)
2355 goto out;
2356
2357 c.seq = hdr->sadb_msg_seq;
2358 c.pid = hdr->sadb_msg_pid;
2359 c.event = XFRM_MSG_DELPOLICY;
2360 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2361
2362 out:
2363 xfrm_pol_put(xp);
2364 return err;
2365 }
2366
2367 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2368 {
2369 int err;
2370 struct sk_buff *out_skb;
2371 struct sadb_msg *out_hdr;
2372 err = 0;
2373
2374 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2375 if (IS_ERR(out_skb)) {
2376 err = PTR_ERR(out_skb);
2377 goto out;
2378 }
2379 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2380 if (err < 0)
2381 goto out;
2382
2383 out_hdr = (struct sadb_msg *) out_skb->data;
2384 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2385 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2386 out_hdr->sadb_msg_satype = 0;
2387 out_hdr->sadb_msg_errno = 0;
2388 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2389 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2390 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2391 err = 0;
2392
2393 out:
2394 return err;
2395 }
2396
2397 #ifdef CONFIG_NET_KEY_MIGRATE
2398 static int pfkey_sockaddr_pair_size(sa_family_t family)
2399 {
2400 switch (family) {
2401 case AF_INET:
2402 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2403 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2404 case AF_INET6:
2405 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2406 #endif
2407 default:
2408 return 0;
2409 }
2410 /* NOTREACHED */
2411 }
2412
2413 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2414 xfrm_address_t *saddr, xfrm_address_t *daddr,
2415 u16 *family)
2416 {
2417 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2418 if (rq->sadb_x_ipsecrequest_len <
2419 pfkey_sockaddr_pair_size(sa->sa_family))
2420 return -EINVAL;
2421
2422 switch (sa->sa_family) {
2423 case AF_INET:
2424 {
2425 struct sockaddr_in *sin;
2426 sin = (struct sockaddr_in *)sa;
2427 if ((sin+1)->sin_family != AF_INET)
2428 return -EINVAL;
2429 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2430 sin++;
2431 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2432 *family = AF_INET;
2433 break;
2434 }
2435 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2436 case AF_INET6:
2437 {
2438 struct sockaddr_in6 *sin6;
2439 sin6 = (struct sockaddr_in6 *)sa;
2440 if ((sin6+1)->sin6_family != AF_INET6)
2441 return -EINVAL;
2442 memcpy(&saddr->a6, &sin6->sin6_addr,
2443 sizeof(saddr->a6));
2444 sin6++;
2445 memcpy(&daddr->a6, &sin6->sin6_addr,
2446 sizeof(daddr->a6));
2447 *family = AF_INET6;
2448 break;
2449 }
2450 #endif
2451 default:
2452 return -EINVAL;
2453 }
2454
2455 return 0;
2456 }
2457
2458 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2459 struct xfrm_migrate *m)
2460 {
2461 int err;
2462 struct sadb_x_ipsecrequest *rq2;
2463 int mode;
2464
2465 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2466 len < rq1->sadb_x_ipsecrequest_len)
2467 return -EINVAL;
2468
2469 /* old endoints */
2470 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2471 &m->old_family);
2472 if (err)
2473 return err;
2474
2475 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2476 len -= rq1->sadb_x_ipsecrequest_len;
2477
2478 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2479 len < rq2->sadb_x_ipsecrequest_len)
2480 return -EINVAL;
2481
2482 /* new endpoints */
2483 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2484 &m->new_family);
2485 if (err)
2486 return err;
2487
2488 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2489 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2490 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2491 return -EINVAL;
2492
2493 m->proto = rq1->sadb_x_ipsecrequest_proto;
2494 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2495 return -EINVAL;
2496 m->mode = mode;
2497 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2498
2499 return ((int)(rq1->sadb_x_ipsecrequest_len +
2500 rq2->sadb_x_ipsecrequest_len));
2501 }
2502
2503 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2504 struct sadb_msg *hdr, void **ext_hdrs)
2505 {
2506 int i, len, ret, err = -EINVAL;
2507 u8 dir;
2508 struct sadb_address *sa;
2509 struct sadb_x_policy *pol;
2510 struct sadb_x_ipsecrequest *rq;
2511 struct xfrm_selector sel;
2512 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2513
2514 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2515 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2516 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2517 err = -EINVAL;
2518 goto out;
2519 }
2520
2521 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2522 if (!pol) {
2523 err = -EINVAL;
2524 goto out;
2525 }
2526
2527 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2528 err = -EINVAL;
2529 goto out;
2530 }
2531
2532 dir = pol->sadb_x_policy_dir - 1;
2533 memset(&sel, 0, sizeof(sel));
2534
2535 /* set source address info of selector */
2536 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2537 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2538 sel.prefixlen_s = sa->sadb_address_prefixlen;
2539 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2540 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2541 if (sel.sport)
2542 sel.sport_mask = ~0;
2543
2544 /* set destination address info of selector */
2545 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2546 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2547 sel.prefixlen_d = sa->sadb_address_prefixlen;
2548 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2549 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2550 if (sel.dport)
2551 sel.dport_mask = ~0;
2552
2553 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2554
2555 /* extract ipsecrequests */
2556 i = 0;
2557 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2558
2559 while (len > 0 && i < XFRM_MAX_DEPTH) {
2560 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2561 if (ret < 0) {
2562 err = ret;
2563 goto out;
2564 } else {
2565 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2566 len -= ret;
2567 i++;
2568 }
2569 }
2570
2571 if (!i || len > 0) {
2572 err = -EINVAL;
2573 goto out;
2574 }
2575
2576 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2577
2578 out:
2579 return err;
2580 }
2581 #else
2582 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2583 struct sadb_msg *hdr, void **ext_hdrs)
2584 {
2585 return -ENOPROTOOPT;
2586 }
2587 #endif
2588
2589
2590 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2591 {
2592 unsigned int dir;
2593 int err = 0, delete;
2594 struct sadb_x_policy *pol;
2595 struct xfrm_policy *xp;
2596 struct km_event c;
2597
2598 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2599 return -EINVAL;
2600
2601 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2602 if (dir >= XFRM_POLICY_MAX)
2603 return -EINVAL;
2604
2605 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2606 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2607 delete, &err);
2608 if (xp == NULL)
2609 return -ENOENT;
2610
2611 if (delete) {
2612 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2613 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2614
2615 if (err)
2616 goto out;
2617 c.seq = hdr->sadb_msg_seq;
2618 c.pid = hdr->sadb_msg_pid;
2619 c.data.byid = 1;
2620 c.event = XFRM_MSG_DELPOLICY;
2621 km_policy_notify(xp, dir, &c);
2622 } else {
2623 err = key_pol_get_resp(sk, xp, hdr, dir);
2624 }
2625
2626 out:
2627 xfrm_pol_put(xp);
2628 return err;
2629 }
2630
2631 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2632 {
2633 struct pfkey_dump_data *data = ptr;
2634 struct sk_buff *out_skb;
2635 struct sadb_msg *out_hdr;
2636 int err;
2637
2638 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2639 if (IS_ERR(out_skb))
2640 return PTR_ERR(out_skb);
2641
2642 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2643 if (err < 0)
2644 return err;
2645
2646 out_hdr = (struct sadb_msg *) out_skb->data;
2647 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2648 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2649 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2650 out_hdr->sadb_msg_errno = 0;
2651 out_hdr->sadb_msg_seq = count;
2652 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2653 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2654 return 0;
2655 }
2656
2657 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2658 {
2659 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2660
2661 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2662 }
2663
2664 static int key_notify_policy_flush(struct km_event *c)
2665 {
2666 struct sk_buff *skb_out;
2667 struct sadb_msg *hdr;
2668
2669 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2670 if (!skb_out)
2671 return -ENOBUFS;
2672 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2673 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2674 hdr->sadb_msg_seq = c->seq;
2675 hdr->sadb_msg_pid = c->pid;
2676 hdr->sadb_msg_version = PF_KEY_V2;
2677 hdr->sadb_msg_errno = (uint8_t) 0;
2678 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2679 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2680 return 0;
2681
2682 }
2683
2684 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2685 {
2686 struct km_event c;
2687 struct xfrm_audit audit_info;
2688
2689 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2690 audit_info.secid = 0;
2691 xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2692 c.data.type = XFRM_POLICY_TYPE_MAIN;
2693 c.event = XFRM_MSG_FLUSHPOLICY;
2694 c.pid = hdr->sadb_msg_pid;
2695 c.seq = hdr->sadb_msg_seq;
2696 km_policy_notify(NULL, 0, &c);
2697
2698 return 0;
2699 }
2700
2701 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2702 struct sadb_msg *hdr, void **ext_hdrs);
2703 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2704 [SADB_RESERVED] = pfkey_reserved,
2705 [SADB_GETSPI] = pfkey_getspi,
2706 [SADB_UPDATE] = pfkey_add,
2707 [SADB_ADD] = pfkey_add,
2708 [SADB_DELETE] = pfkey_delete,
2709 [SADB_GET] = pfkey_get,
2710 [SADB_ACQUIRE] = pfkey_acquire,
2711 [SADB_REGISTER] = pfkey_register,
2712 [SADB_EXPIRE] = NULL,
2713 [SADB_FLUSH] = pfkey_flush,
2714 [SADB_DUMP] = pfkey_dump,
2715 [SADB_X_PROMISC] = pfkey_promisc,
2716 [SADB_X_PCHANGE] = NULL,
2717 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2718 [SADB_X_SPDADD] = pfkey_spdadd,
2719 [SADB_X_SPDDELETE] = pfkey_spddelete,
2720 [SADB_X_SPDGET] = pfkey_spdget,
2721 [SADB_X_SPDACQUIRE] = NULL,
2722 [SADB_X_SPDDUMP] = pfkey_spddump,
2723 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2724 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2725 [SADB_X_SPDDELETE2] = pfkey_spdget,
2726 [SADB_X_MIGRATE] = pfkey_migrate,
2727 };
2728
2729 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2730 {
2731 void *ext_hdrs[SADB_EXT_MAX];
2732 int err;
2733
2734 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2735 BROADCAST_PROMISC_ONLY, NULL);
2736
2737 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2738 err = parse_exthdrs(skb, hdr, ext_hdrs);
2739 if (!err) {
2740 err = -EOPNOTSUPP;
2741 if (pfkey_funcs[hdr->sadb_msg_type])
2742 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2743 }
2744 return err;
2745 }
2746
2747 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2748 {
2749 struct sadb_msg *hdr = NULL;
2750
2751 if (skb->len < sizeof(*hdr)) {
2752 *errp = -EMSGSIZE;
2753 } else {
2754 hdr = (struct sadb_msg *) skb->data;
2755 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2756 hdr->sadb_msg_reserved != 0 ||
2757 (hdr->sadb_msg_type <= SADB_RESERVED ||
2758 hdr->sadb_msg_type > SADB_MAX)) {
2759 hdr = NULL;
2760 *errp = -EINVAL;
2761 } else if (hdr->sadb_msg_len != (skb->len /
2762 sizeof(uint64_t)) ||
2763 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2764 sizeof(uint64_t))) {
2765 hdr = NULL;
2766 *errp = -EMSGSIZE;
2767 } else {
2768 *errp = 0;
2769 }
2770 }
2771 return hdr;
2772 }
2773
2774 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2775 {
2776 return t->aalgos & (1 << d->desc.sadb_alg_id);
2777 }
2778
2779 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2780 {
2781 return t->ealgos & (1 << d->desc.sadb_alg_id);
2782 }
2783
2784 static int count_ah_combs(struct xfrm_tmpl *t)
2785 {
2786 int i, sz = 0;
2787
2788 for (i = 0; ; i++) {
2789 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2790 if (!aalg)
2791 break;
2792 if (aalg_tmpl_set(t, aalg) && aalg->available)
2793 sz += sizeof(struct sadb_comb);
2794 }
2795 return sz + sizeof(struct sadb_prop);
2796 }
2797
2798 static int count_esp_combs(struct xfrm_tmpl *t)
2799 {
2800 int i, k, sz = 0;
2801
2802 for (i = 0; ; i++) {
2803 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2804 if (!ealg)
2805 break;
2806
2807 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2808 continue;
2809
2810 for (k = 1; ; k++) {
2811 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2812 if (!aalg)
2813 break;
2814
2815 if (aalg_tmpl_set(t, aalg) && aalg->available)
2816 sz += sizeof(struct sadb_comb);
2817 }
2818 }
2819 return sz + sizeof(struct sadb_prop);
2820 }
2821
2822 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2823 {
2824 struct sadb_prop *p;
2825 int i;
2826
2827 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2828 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2829 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2830 p->sadb_prop_replay = 32;
2831 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2832
2833 for (i = 0; ; i++) {
2834 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2835 if (!aalg)
2836 break;
2837
2838 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2839 struct sadb_comb *c;
2840 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2841 memset(c, 0, sizeof(*c));
2842 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2843 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2844 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2845 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2846 c->sadb_comb_hard_addtime = 24*60*60;
2847 c->sadb_comb_soft_addtime = 20*60*60;
2848 c->sadb_comb_hard_usetime = 8*60*60;
2849 c->sadb_comb_soft_usetime = 7*60*60;
2850 }
2851 }
2852 }
2853
2854 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2855 {
2856 struct sadb_prop *p;
2857 int i, k;
2858
2859 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2860 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2861 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2862 p->sadb_prop_replay = 32;
2863 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2864
2865 for (i=0; ; i++) {
2866 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2867 if (!ealg)
2868 break;
2869
2870 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2871 continue;
2872
2873 for (k = 1; ; k++) {
2874 struct sadb_comb *c;
2875 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2876 if (!aalg)
2877 break;
2878 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2879 continue;
2880 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2881 memset(c, 0, sizeof(*c));
2882 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2883 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2884 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2885 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2886 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2887 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2888 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2889 c->sadb_comb_hard_addtime = 24*60*60;
2890 c->sadb_comb_soft_addtime = 20*60*60;
2891 c->sadb_comb_hard_usetime = 8*60*60;
2892 c->sadb_comb_soft_usetime = 7*60*60;
2893 }
2894 }
2895 }
2896
2897 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2898 {
2899 return 0;
2900 }
2901
2902 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2903 {
2904 struct sk_buff *out_skb;
2905 struct sadb_msg *out_hdr;
2906 int hard;
2907 int hsc;
2908
2909 hard = c->data.hard;
2910 if (hard)
2911 hsc = 2;
2912 else
2913 hsc = 1;
2914
2915 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2916 if (IS_ERR(out_skb))
2917 return PTR_ERR(out_skb);
2918
2919 out_hdr = (struct sadb_msg *) out_skb->data;
2920 out_hdr->sadb_msg_version = PF_KEY_V2;
2921 out_hdr->sadb_msg_type = SADB_EXPIRE;
2922 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2923 out_hdr->sadb_msg_errno = 0;
2924 out_hdr->sadb_msg_reserved = 0;
2925 out_hdr->sadb_msg_seq = 0;
2926 out_hdr->sadb_msg_pid = 0;
2927
2928 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2929 return 0;
2930 }
2931
2932 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2933 {
2934 switch (c->event) {
2935 case XFRM_MSG_EXPIRE:
2936 return key_notify_sa_expire(x, c);
2937 case XFRM_MSG_DELSA:
2938 case XFRM_MSG_NEWSA:
2939 case XFRM_MSG_UPDSA:
2940 return key_notify_sa(x, c);
2941 case XFRM_MSG_FLUSHSA:
2942 return key_notify_sa_flush(c);
2943 case XFRM_MSG_NEWAE: /* not yet supported */
2944 break;
2945 default:
2946 printk("pfkey: Unknown SA event %d\n", c->event);
2947 break;
2948 }
2949
2950 return 0;
2951 }
2952
2953 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2954 {
2955 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2956 return 0;
2957
2958 switch (c->event) {
2959 case XFRM_MSG_POLEXPIRE:
2960 return key_notify_policy_expire(xp, c);
2961 case XFRM_MSG_DELPOLICY:
2962 case XFRM_MSG_NEWPOLICY:
2963 case XFRM_MSG_UPDPOLICY:
2964 return key_notify_policy(xp, dir, c);
2965 case XFRM_MSG_FLUSHPOLICY:
2966 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2967 break;
2968 return key_notify_policy_flush(c);
2969 default:
2970 printk("pfkey: Unknown policy event %d\n", c->event);
2971 break;
2972 }
2973
2974 return 0;
2975 }
2976
2977 static u32 get_acqseq(void)
2978 {
2979 u32 res;
2980 static u32 acqseq;
2981 static DEFINE_SPINLOCK(acqseq_lock);
2982
2983 spin_lock_bh(&acqseq_lock);
2984 res = (++acqseq ? : ++acqseq);
2985 spin_unlock_bh(&acqseq_lock);
2986 return res;
2987 }
2988
2989 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2990 {
2991 struct sk_buff *skb;
2992 struct sadb_msg *hdr;
2993 struct sadb_address *addr;
2994 struct sadb_x_policy *pol;
2995 struct sockaddr_in *sin;
2996 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2997 struct sockaddr_in6 *sin6;
2998 #endif
2999 int sockaddr_size;
3000 int size;
3001 struct sadb_x_sec_ctx *sec_ctx;
3002 struct xfrm_sec_ctx *xfrm_ctx;
3003 int ctx_size = 0;
3004
3005 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3006 if (!sockaddr_size)
3007 return -EINVAL;
3008
3009 size = sizeof(struct sadb_msg) +
3010 (sizeof(struct sadb_address) * 2) +
3011 (sockaddr_size * 2) +
3012 sizeof(struct sadb_x_policy);
3013
3014 if (x->id.proto == IPPROTO_AH)
3015 size += count_ah_combs(t);
3016 else if (x->id.proto == IPPROTO_ESP)
3017 size += count_esp_combs(t);
3018
3019 if ((xfrm_ctx = x->security)) {
3020 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3021 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3022 }
3023
3024 skb = alloc_skb(size + 16, GFP_ATOMIC);
3025 if (skb == NULL)
3026 return -ENOMEM;
3027
3028 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3029 hdr->sadb_msg_version = PF_KEY_V2;
3030 hdr->sadb_msg_type = SADB_ACQUIRE;
3031 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3032 hdr->sadb_msg_len = size / sizeof(uint64_t);
3033 hdr->sadb_msg_errno = 0;
3034 hdr->sadb_msg_reserved = 0;
3035 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3036 hdr->sadb_msg_pid = 0;
3037
3038 /* src address */
3039 addr = (struct sadb_address*) skb_put(skb,
3040 sizeof(struct sadb_address)+sockaddr_size);
3041 addr->sadb_address_len =
3042 (sizeof(struct sadb_address)+sockaddr_size)/
3043 sizeof(uint64_t);
3044 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3045 addr->sadb_address_proto = 0;
3046 addr->sadb_address_reserved = 0;
3047 if (x->props.family == AF_INET) {
3048 addr->sadb_address_prefixlen = 32;
3049
3050 sin = (struct sockaddr_in *) (addr + 1);
3051 sin->sin_family = AF_INET;
3052 sin->sin_addr.s_addr = x->props.saddr.a4;
3053 sin->sin_port = 0;
3054 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3055 }
3056 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3057 else if (x->props.family == AF_INET6) {
3058 addr->sadb_address_prefixlen = 128;
3059
3060 sin6 = (struct sockaddr_in6 *) (addr + 1);
3061 sin6->sin6_family = AF_INET6;
3062 sin6->sin6_port = 0;
3063 sin6->sin6_flowinfo = 0;
3064 memcpy(&sin6->sin6_addr,
3065 x->props.saddr.a6, sizeof(struct in6_addr));
3066 sin6->sin6_scope_id = 0;
3067 }
3068 #endif
3069 else
3070 BUG();
3071
3072 /* dst address */
3073 addr = (struct sadb_address*) skb_put(skb,
3074 sizeof(struct sadb_address)+sockaddr_size);
3075 addr->sadb_address_len =
3076 (sizeof(struct sadb_address)+sockaddr_size)/
3077 sizeof(uint64_t);
3078 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3079 addr->sadb_address_proto = 0;
3080 addr->sadb_address_reserved = 0;
3081 if (x->props.family == AF_INET) {
3082 addr->sadb_address_prefixlen = 32;
3083
3084 sin = (struct sockaddr_in *) (addr + 1);
3085 sin->sin_family = AF_INET;
3086 sin->sin_addr.s_addr = x->id.daddr.a4;
3087 sin->sin_port = 0;
3088 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3089 }
3090 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3091 else if (x->props.family == AF_INET6) {
3092 addr->sadb_address_prefixlen = 128;
3093
3094 sin6 = (struct sockaddr_in6 *) (addr + 1);
3095 sin6->sin6_family = AF_INET6;
3096 sin6->sin6_port = 0;
3097 sin6->sin6_flowinfo = 0;
3098 memcpy(&sin6->sin6_addr,
3099 x->id.daddr.a6, sizeof(struct in6_addr));
3100 sin6->sin6_scope_id = 0;
3101 }
3102 #endif
3103 else
3104 BUG();
3105
3106 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3107 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3108 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3109 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3110 pol->sadb_x_policy_dir = dir+1;
3111 pol->sadb_x_policy_id = xp->index;
3112
3113 /* Set sadb_comb's. */
3114 if (x->id.proto == IPPROTO_AH)
3115 dump_ah_combs(skb, t);
3116 else if (x->id.proto == IPPROTO_ESP)
3117 dump_esp_combs(skb, t);
3118
3119 /* security context */
3120 if (xfrm_ctx) {
3121 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3122 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3123 sec_ctx->sadb_x_sec_len =
3124 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3125 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3126 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3127 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3128 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3129 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3130 xfrm_ctx->ctx_len);
3131 }
3132
3133 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3134 }
3135
3136 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3137 u8 *data, int len, int *dir)
3138 {
3139 struct xfrm_policy *xp;
3140 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3141 struct sadb_x_sec_ctx *sec_ctx;
3142
3143 switch (sk->sk_family) {
3144 case AF_INET:
3145 if (opt != IP_IPSEC_POLICY) {
3146 *dir = -EOPNOTSUPP;
3147 return NULL;
3148 }
3149 break;
3150 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3151 case AF_INET6:
3152 if (opt != IPV6_IPSEC_POLICY) {
3153 *dir = -EOPNOTSUPP;
3154 return NULL;
3155 }
3156 break;
3157 #endif
3158 default:
3159 *dir = -EINVAL;
3160 return NULL;
3161 }
3162
3163 *dir = -EINVAL;
3164
3165 if (len < sizeof(struct sadb_x_policy) ||
3166 pol->sadb_x_policy_len*8 > len ||
3167 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3168 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3169 return NULL;
3170
3171 xp = xfrm_policy_alloc(GFP_ATOMIC);
3172 if (xp == NULL) {
3173 *dir = -ENOBUFS;
3174 return NULL;
3175 }
3176
3177 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3178 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3179
3180 xp->lft.soft_byte_limit = XFRM_INF;
3181 xp->lft.hard_byte_limit = XFRM_INF;
3182 xp->lft.soft_packet_limit = XFRM_INF;
3183 xp->lft.hard_packet_limit = XFRM_INF;
3184 xp->family = sk->sk_family;
3185
3186 xp->xfrm_nr = 0;
3187 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3188 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3189 goto out;
3190
3191 /* security context too */
3192 if (len >= (pol->sadb_x_policy_len*8 +
3193 sizeof(struct sadb_x_sec_ctx))) {
3194 char *p = (char *)pol;
3195 struct xfrm_user_sec_ctx *uctx;
3196
3197 p += pol->sadb_x_policy_len*8;
3198 sec_ctx = (struct sadb_x_sec_ctx *)p;
3199 if (len < pol->sadb_x_policy_len*8 +
3200 sec_ctx->sadb_x_sec_len) {
3201 *dir = -EINVAL;
3202 goto out;
3203 }
3204 if ((*dir = verify_sec_ctx_len(p)))
3205 goto out;
3206 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3207 *dir = security_xfrm_policy_alloc(xp, uctx);
3208 kfree(uctx);
3209
3210 if (*dir)
3211 goto out;
3212 }
3213
3214 *dir = pol->sadb_x_policy_dir-1;
3215 return xp;
3216
3217 out:
3218 security_xfrm_policy_free(xp);
3219 kfree(xp);
3220 return NULL;
3221 }
3222
3223 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3224 {
3225 struct sk_buff *skb;
3226 struct sadb_msg *hdr;
3227 struct sadb_sa *sa;
3228 struct sadb_address *addr;
3229 struct sadb_x_nat_t_port *n_port;
3230 struct sockaddr_in *sin;
3231 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3232 struct sockaddr_in6 *sin6;
3233 #endif
3234 int sockaddr_size;
3235 int size;
3236 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3237 struct xfrm_encap_tmpl *natt = NULL;
3238
3239 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3240 if (!sockaddr_size)
3241 return -EINVAL;
3242
3243 if (!satype)
3244 return -EINVAL;
3245
3246 if (!x->encap)
3247 return -EINVAL;
3248
3249 natt = x->encap;
3250
3251 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3252 *
3253 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3254 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3255 */
3256
3257 size = sizeof(struct sadb_msg) +
3258 sizeof(struct sadb_sa) +
3259 (sizeof(struct sadb_address) * 2) +
3260 (sockaddr_size * 2) +
3261 (sizeof(struct sadb_x_nat_t_port) * 2);
3262
3263 skb = alloc_skb(size + 16, GFP_ATOMIC);
3264 if (skb == NULL)
3265 return -ENOMEM;
3266
3267 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3268 hdr->sadb_msg_version = PF_KEY_V2;
3269 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3270 hdr->sadb_msg_satype = satype;
3271 hdr->sadb_msg_len = size / sizeof(uint64_t);
3272 hdr->sadb_msg_errno = 0;
3273 hdr->sadb_msg_reserved = 0;
3274 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3275 hdr->sadb_msg_pid = 0;
3276
3277 /* SA */
3278 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3279 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3280 sa->sadb_sa_exttype = SADB_EXT_SA;
3281 sa->sadb_sa_spi = x->id.spi;
3282 sa->sadb_sa_replay = 0;
3283 sa->sadb_sa_state = 0;
3284 sa->sadb_sa_auth = 0;
3285 sa->sadb_sa_encrypt = 0;
3286 sa->sadb_sa_flags = 0;
3287
3288 /* ADDRESS_SRC (old addr) */
3289 addr = (struct sadb_address*)
3290 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3291 addr->sadb_address_len =
3292 (sizeof(struct sadb_address)+sockaddr_size)/
3293 sizeof(uint64_t);
3294 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3295 addr->sadb_address_proto = 0;
3296 addr->sadb_address_reserved = 0;
3297 if (x->props.family == AF_INET) {
3298 addr->sadb_address_prefixlen = 32;
3299
3300 sin = (struct sockaddr_in *) (addr + 1);
3301 sin->sin_family = AF_INET;
3302 sin->sin_addr.s_addr = x->props.saddr.a4;
3303 sin->sin_port = 0;
3304 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3305 }
3306 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3307 else if (x->props.family == AF_INET6) {
3308 addr->sadb_address_prefixlen = 128;
3309
3310 sin6 = (struct sockaddr_in6 *) (addr + 1);
3311 sin6->sin6_family = AF_INET6;
3312 sin6->sin6_port = 0;
3313 sin6->sin6_flowinfo = 0;
3314 memcpy(&sin6->sin6_addr,
3315 x->props.saddr.a6, sizeof(struct in6_addr));
3316 sin6->sin6_scope_id = 0;
3317 }
3318 #endif
3319 else
3320 BUG();
3321
3322 /* NAT_T_SPORT (old port) */
3323 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3324 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3325 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3326 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3327 n_port->sadb_x_nat_t_port_reserved = 0;
3328
3329 /* ADDRESS_DST (new addr) */
3330 addr = (struct sadb_address*)
3331 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3332 addr->sadb_address_len =
3333 (sizeof(struct sadb_address)+sockaddr_size)/
3334 sizeof(uint64_t);
3335 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3336 addr->sadb_address_proto = 0;
3337 addr->sadb_address_reserved = 0;
3338 if (x->props.family == AF_INET) {
3339 addr->sadb_address_prefixlen = 32;
3340
3341 sin = (struct sockaddr_in *) (addr + 1);
3342 sin->sin_family = AF_INET;
3343 sin->sin_addr.s_addr = ipaddr->a4;
3344 sin->sin_port = 0;
3345 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3346 }
3347 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3348 else if (x->props.family == AF_INET6) {
3349 addr->sadb_address_prefixlen = 128;
3350
3351 sin6 = (struct sockaddr_in6 *) (addr + 1);
3352 sin6->sin6_family = AF_INET6;
3353 sin6->sin6_port = 0;
3354 sin6->sin6_flowinfo = 0;
3355 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3356 sin6->sin6_scope_id = 0;
3357 }
3358 #endif
3359 else
3360 BUG();
3361
3362 /* NAT_T_DPORT (new port) */
3363 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3364 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3365 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3366 n_port->sadb_x_nat_t_port_port = sport;
3367 n_port->sadb_x_nat_t_port_reserved = 0;
3368
3369 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3370 }
3371
3372 #ifdef CONFIG_NET_KEY_MIGRATE
3373 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3374 struct xfrm_selector *sel)
3375 {
3376 struct sadb_address *addr;
3377 struct sockaddr_in *sin;
3378 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3379 struct sockaddr_in6 *sin6;
3380 #endif
3381 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3382 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3383 addr->sadb_address_exttype = type;
3384 addr->sadb_address_proto = sel->proto;
3385 addr->sadb_address_reserved = 0;
3386
3387 switch (type) {
3388 case SADB_EXT_ADDRESS_SRC:
3389 if (sel->family == AF_INET) {
3390 addr->sadb_address_prefixlen = sel->prefixlen_s;
3391 sin = (struct sockaddr_in *)(addr + 1);
3392 sin->sin_family = AF_INET;
3393 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3394 sizeof(sin->sin_addr.s_addr));
3395 sin->sin_port = 0;
3396 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3397 }
3398 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3399 else if (sel->family == AF_INET6) {
3400 addr->sadb_address_prefixlen = sel->prefixlen_s;
3401 sin6 = (struct sockaddr_in6 *)(addr + 1);
3402 sin6->sin6_family = AF_INET6;
3403 sin6->sin6_port = 0;
3404 sin6->sin6_flowinfo = 0;
3405 sin6->sin6_scope_id = 0;
3406 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3407 sizeof(sin6->sin6_addr.s6_addr));
3408 }
3409 #endif
3410 break;
3411 case SADB_EXT_ADDRESS_DST:
3412 if (sel->family == AF_INET) {
3413 addr->sadb_address_prefixlen = sel->prefixlen_d;
3414 sin = (struct sockaddr_in *)(addr + 1);
3415 sin->sin_family = AF_INET;
3416 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3417 sizeof(sin->sin_addr.s_addr));
3418 sin->sin_port = 0;
3419 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3420 }
3421 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3422 else if (sel->family == AF_INET6) {
3423 addr->sadb_address_prefixlen = sel->prefixlen_d;
3424 sin6 = (struct sockaddr_in6 *)(addr + 1);
3425 sin6->sin6_family = AF_INET6;
3426 sin6->sin6_port = 0;
3427 sin6->sin6_flowinfo = 0;
3428 sin6->sin6_scope_id = 0;
3429 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3430 sizeof(sin6->sin6_addr.s6_addr));
3431 }
3432 #endif
3433 break;
3434 default:
3435 return -EINVAL;
3436 }
3437
3438 return 0;
3439 }
3440
3441 static int set_ipsecrequest(struct sk_buff *skb,
3442 uint8_t proto, uint8_t mode, int level,
3443 uint32_t reqid, uint8_t family,
3444 xfrm_address_t *src, xfrm_address_t *dst)
3445 {
3446 struct sadb_x_ipsecrequest *rq;
3447 struct sockaddr_in *sin;
3448 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3449 struct sockaddr_in6 *sin6;
3450 #endif
3451 int size_req;
3452
3453 size_req = sizeof(struct sadb_x_ipsecrequest) +
3454 pfkey_sockaddr_pair_size(family);
3455
3456 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3457 memset(rq, 0, size_req);
3458 rq->sadb_x_ipsecrequest_len = size_req;
3459 rq->sadb_x_ipsecrequest_proto = proto;
3460 rq->sadb_x_ipsecrequest_mode = mode;
3461 rq->sadb_x_ipsecrequest_level = level;
3462 rq->sadb_x_ipsecrequest_reqid = reqid;
3463
3464 switch (family) {
3465 case AF_INET:
3466 sin = (struct sockaddr_in *)(rq + 1);
3467 sin->sin_family = AF_INET;
3468 memcpy(&sin->sin_addr.s_addr, src,
3469 sizeof(sin->sin_addr.s_addr));
3470 sin++;
3471 sin->sin_family = AF_INET;
3472 memcpy(&sin->sin_addr.s_addr, dst,
3473 sizeof(sin->sin_addr.s_addr));
3474 break;
3475 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3476 case AF_INET6:
3477 sin6 = (struct sockaddr_in6 *)(rq + 1);
3478 sin6->sin6_family = AF_INET6;
3479 sin6->sin6_port = 0;
3480 sin6->sin6_flowinfo = 0;
3481 sin6->sin6_scope_id = 0;
3482 memcpy(&sin6->sin6_addr.s6_addr, src,
3483 sizeof(sin6->sin6_addr.s6_addr));
3484 sin6++;
3485 sin6->sin6_family = AF_INET6;
3486 sin6->sin6_port = 0;
3487 sin6->sin6_flowinfo = 0;
3488 sin6->sin6_scope_id = 0;
3489 memcpy(&sin6->sin6_addr.s6_addr, dst,
3490 sizeof(sin6->sin6_addr.s6_addr));
3491 break;
3492 #endif
3493 default:
3494 return -EINVAL;
3495 }
3496
3497 return 0;
3498 }
3499 #endif
3500
3501 #ifdef CONFIG_NET_KEY_MIGRATE
3502 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3503 struct xfrm_migrate *m, int num_bundles)
3504 {
3505 int i;
3506 int sasize_sel;
3507 int size = 0;
3508 int size_pol = 0;
3509 struct sk_buff *skb;
3510 struct sadb_msg *hdr;
3511 struct sadb_x_policy *pol;
3512 struct xfrm_migrate *mp;
3513
3514 if (type != XFRM_POLICY_TYPE_MAIN)
3515 return 0;
3516
3517 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3518 return -EINVAL;
3519
3520 /* selector */
3521 sasize_sel = pfkey_sockaddr_size(sel->family);
3522 if (!sasize_sel)
3523 return -EINVAL;
3524 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3525
3526 /* policy info */
3527 size_pol += sizeof(struct sadb_x_policy);
3528
3529 /* ipsecrequests */
3530 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3531 /* old locator pair */
3532 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3533 pfkey_sockaddr_pair_size(mp->old_family);
3534 /* new locator pair */
3535 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3536 pfkey_sockaddr_pair_size(mp->new_family);
3537 }
3538
3539 size += sizeof(struct sadb_msg) + size_pol;
3540
3541 /* alloc buffer */
3542 skb = alloc_skb(size, GFP_ATOMIC);
3543 if (skb == NULL)
3544 return -ENOMEM;
3545
3546 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3547 hdr->sadb_msg_version = PF_KEY_V2;
3548 hdr->sadb_msg_type = SADB_X_MIGRATE;
3549 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3550 hdr->sadb_msg_len = size / 8;
3551 hdr->sadb_msg_errno = 0;
3552 hdr->sadb_msg_reserved = 0;
3553 hdr->sadb_msg_seq = 0;
3554 hdr->sadb_msg_pid = 0;
3555
3556 /* selector src */
3557 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3558
3559 /* selector dst */
3560 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3561
3562 /* policy information */
3563 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3564 pol->sadb_x_policy_len = size_pol / 8;
3565 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3566 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3567 pol->sadb_x_policy_dir = dir + 1;
3568 pol->sadb_x_policy_id = 0;
3569 pol->sadb_x_policy_priority = 0;
3570
3571 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3572 /* old ipsecrequest */
3573 int mode = pfkey_mode_from_xfrm(mp->mode);
3574 if (mode < 0)
3575 return -EINVAL;
3576 if (set_ipsecrequest(skb, mp->proto, mode,
3577 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3578 mp->reqid, mp->old_family,
3579 &mp->old_saddr, &mp->old_daddr) < 0) {
3580 return -EINVAL;
3581 }
3582
3583 /* new ipsecrequest */
3584 if (set_ipsecrequest(skb, mp->proto, mode,
3585 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3586 mp->reqid, mp->new_family,
3587 &mp->new_saddr, &mp->new_daddr) < 0) {
3588 return -EINVAL;
3589 }
3590 }
3591
3592 /* broadcast migrate message to sockets */
3593 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3594
3595 return 0;
3596 }
3597 #else
3598 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3599 struct xfrm_migrate *m, int num_bundles)
3600 {
3601 return -ENOPROTOOPT;
3602 }
3603 #endif
3604
3605 static int pfkey_sendmsg(struct kiocb *kiocb,
3606 struct socket *sock, struct msghdr *msg, size_t len)
3607 {
3608 struct sock *sk = sock->sk;
3609 struct sk_buff *skb = NULL;
3610 struct sadb_msg *hdr = NULL;
3611 int err;
3612
3613 err = -EOPNOTSUPP;
3614 if (msg->msg_flags & MSG_OOB)
3615 goto out;
3616
3617 err = -EMSGSIZE;
3618 if ((unsigned)len > sk->sk_sndbuf - 32)
3619 goto out;
3620
3621 err = -ENOBUFS;
3622 skb = alloc_skb(len, GFP_KERNEL);
3623 if (skb == NULL)
3624 goto out;
3625
3626 err = -EFAULT;
3627 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3628 goto out;
3629
3630 hdr = pfkey_get_base_msg(skb, &err);
3631 if (!hdr)
3632 goto out;
3633
3634 mutex_lock(&xfrm_cfg_mutex);
3635 err = pfkey_process(sk, skb, hdr);
3636 mutex_unlock(&xfrm_cfg_mutex);
3637
3638 out:
3639 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3640 err = 0;
3641 if (skb)
3642 kfree_skb(skb);
3643
3644 return err ? : len;
3645 }
3646
3647 static int pfkey_recvmsg(struct kiocb *kiocb,
3648 struct socket *sock, struct msghdr *msg, size_t len,
3649 int flags)
3650 {
3651 struct sock *sk = sock->sk;
3652 struct sk_buff *skb;
3653 int copied, err;
3654
3655 err = -EINVAL;
3656 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3657 goto out;
3658
3659 msg->msg_namelen = 0;
3660 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3661 if (skb == NULL)
3662 goto out;
3663
3664 copied = skb->len;
3665 if (copied > len) {
3666 msg->msg_flags |= MSG_TRUNC;
3667 copied = len;
3668 }
3669
3670 skb_reset_transport_header(skb);
3671 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3672 if (err)
3673 goto out_free;
3674
3675 sock_recv_timestamp(msg, sk, skb);
3676
3677 err = (flags & MSG_TRUNC) ? skb->len : copied;
3678
3679 out_free:
3680 skb_free_datagram(sk, skb);
3681 out:
3682 return err;
3683 }
3684
3685 static const struct proto_ops pfkey_ops = {
3686 .family = PF_KEY,
3687 .owner = THIS_MODULE,
3688 /* Operations that make no sense on pfkey sockets. */
3689 .bind = sock_no_bind,
3690 .connect = sock_no_connect,
3691 .socketpair = sock_no_socketpair,
3692 .accept = sock_no_accept,
3693 .getname = sock_no_getname,
3694 .ioctl = sock_no_ioctl,
3695 .listen = sock_no_listen,
3696 .shutdown = sock_no_shutdown,
3697 .setsockopt = sock_no_setsockopt,
3698 .getsockopt = sock_no_getsockopt,
3699 .mmap = sock_no_mmap,
3700 .sendpage = sock_no_sendpage,
3701
3702 /* Now the operations that really occur. */
3703 .release = pfkey_release,
3704 .poll = datagram_poll,
3705 .sendmsg = pfkey_sendmsg,
3706 .recvmsg = pfkey_recvmsg,
3707 };
3708
3709 static struct net_proto_family pfkey_family_ops = {
3710 .family = PF_KEY,
3711 .create = pfkey_create,
3712 .owner = THIS_MODULE,
3713 };
3714
3715 #ifdef CONFIG_PROC_FS
3716 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3717 int length, int *eof, void *data)
3718 {
3719 off_t pos = 0;
3720 off_t begin = 0;
3721 int len = 0;
3722 struct sock *s;
3723 struct hlist_node *node;
3724
3725 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3726
3727 read_lock(&pfkey_table_lock);
3728
3729 sk_for_each(s, node, &pfkey_table) {
3730 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3731 s,
3732 atomic_read(&s->sk_refcnt),
3733 atomic_read(&s->sk_rmem_alloc),
3734 atomic_read(&s->sk_wmem_alloc),
3735 sock_i_uid(s),
3736 sock_i_ino(s)
3737 );
3738
3739 buffer[len++] = '\n';
3740
3741 pos = begin + len;
3742 if (pos < offset) {
3743 len = 0;
3744 begin = pos;
3745 }
3746 if(pos > offset + length)
3747 goto done;
3748 }
3749 *eof = 1;
3750
3751 done:
3752 read_unlock(&pfkey_table_lock);
3753
3754 *start = buffer + (offset - begin);
3755 len -= (offset - begin);
3756
3757 if (len > length)
3758 len = length;
3759 if (len < 0)
3760 len = 0;
3761
3762 return len;
3763 }
3764 #endif
3765
3766 static struct xfrm_mgr pfkeyv2_mgr =
3767 {
3768 .id = "pfkeyv2",
3769 .notify = pfkey_send_notify,
3770 .acquire = pfkey_send_acquire,
3771 .compile_policy = pfkey_compile_policy,
3772 .new_mapping = pfkey_send_new_mapping,
3773 .notify_policy = pfkey_send_policy_notify,
3774 .migrate = pfkey_send_migrate,
3775 };
3776
3777 static void __exit ipsec_pfkey_exit(void)
3778 {
3779 xfrm_unregister_km(&pfkeyv2_mgr);
3780 remove_proc_entry("net/pfkey", NULL);
3781 sock_unregister(PF_KEY);
3782 proto_unregister(&key_proto);
3783 }
3784
3785 static int __init ipsec_pfkey_init(void)
3786 {
3787 int err = proto_register(&key_proto, 0);
3788
3789 if (err != 0)
3790 goto out;
3791
3792 err = sock_register(&pfkey_family_ops);
3793 if (err != 0)
3794 goto out_unregister_key_proto;
3795 #ifdef CONFIG_PROC_FS
3796 err = -ENOMEM;
3797 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3798 goto out_sock_unregister;
3799 #endif
3800 err = xfrm_register_km(&pfkeyv2_mgr);
3801 if (err != 0)
3802 goto out_remove_proc_entry;
3803 out:
3804 return err;
3805 out_remove_proc_entry:
3806 #ifdef CONFIG_PROC_FS
3807 remove_proc_entry("net/pfkey", NULL);
3808 out_sock_unregister:
3809 #endif
3810 sock_unregister(PF_KEY);
3811 out_unregister_key_proto:
3812 proto_unregister(&key_proto);
3813 goto out;
3814 }
3815
3816 module_init(ipsec_pfkey_init);
3817 module_exit(ipsec_pfkey_exit);
3818 MODULE_LICENSE("GPL");
3819 MODULE_ALIAS_NETPROTO(PF_KEY);
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