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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / key / af_key.c
blob5502df115a633df76ea810bc6b92a8d0baa526cb
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 (!x->sel.family)
1210 x->sel.family = x->props.family;
1211
1212 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1213 struct sadb_x_nat_t_type* n_type;
1214 struct xfrm_encap_tmpl *natt;
1215
1216 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1217 if (!x->encap)
1218 goto out;
1219
1220 natt = x->encap;
1221 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1222 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1223
1224 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1225 struct sadb_x_nat_t_port* n_port =
1226 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1227 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1228 }
1229 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1230 struct sadb_x_nat_t_port* n_port =
1231 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1232 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1233 }
1234 }
1235
1236 err = xfrm_init_state(x);
1237 if (err)
1238 goto out;
1239
1240 x->km.seq = hdr->sadb_msg_seq;
1241 return x;
1242
1243 out:
1244 x->km.state = XFRM_STATE_DEAD;
1245 xfrm_state_put(x);
1246 return ERR_PTR(err);
1247 }
1248
1249 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1250 {
1251 return -EOPNOTSUPP;
1252 }
1253
1254 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1255 {
1256 struct sk_buff *resp_skb;
1257 struct sadb_x_sa2 *sa2;
1258 struct sadb_address *saddr, *daddr;
1259 struct sadb_msg *out_hdr;
1260 struct xfrm_state *x = NULL;
1261 int mode;
1262 u32 reqid;
1263 u8 proto;
1264 unsigned short family;
1265 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1266
1267 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1268 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1269 return -EINVAL;
1270
1271 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1272 if (proto == 0)
1273 return -EINVAL;
1274
1275 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1276 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1277 if (mode < 0)
1278 return -EINVAL;
1279 reqid = sa2->sadb_x_sa2_reqid;
1280 } else {
1281 mode = 0;
1282 reqid = 0;
1283 }
1284
1285 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1286 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1287
1288 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1289 switch (family) {
1290 case AF_INET:
1291 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1292 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1293 break;
1294 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1295 case AF_INET6:
1296 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1297 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1298 break;
1299 #endif
1300 }
1301
1302 if (hdr->sadb_msg_seq) {
1303 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1304 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1305 xfrm_state_put(x);
1306 x = NULL;
1307 }
1308 }
1309
1310 if (!x)
1311 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1312
1313 if (x == NULL)
1314 return -ENOENT;
1315
1316 resp_skb = ERR_PTR(-ENOENT);
1317
1318 spin_lock_bh(&x->lock);
1319 if (x->km.state != XFRM_STATE_DEAD) {
1320 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1321 u32 min_spi, max_spi;
1322
1323 if (range != NULL) {
1324 min_spi = range->sadb_spirange_min;
1325 max_spi = range->sadb_spirange_max;
1326 } else {
1327 min_spi = 0x100;
1328 max_spi = 0x0fffffff;
1329 }
1330 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1331 if (x->id.spi)
1332 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1333 }
1334 spin_unlock_bh(&x->lock);
1335
1336 if (IS_ERR(resp_skb)) {
1337 xfrm_state_put(x);
1338 return PTR_ERR(resp_skb);
1339 }
1340
1341 out_hdr = (struct sadb_msg *) resp_skb->data;
1342 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1343 out_hdr->sadb_msg_type = SADB_GETSPI;
1344 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1345 out_hdr->sadb_msg_errno = 0;
1346 out_hdr->sadb_msg_reserved = 0;
1347 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1348 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1349
1350 xfrm_state_put(x);
1351
1352 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1353
1354 return 0;
1355 }
1356
1357 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1358 {
1359 struct xfrm_state *x;
1360
1361 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1362 return -EOPNOTSUPP;
1363
1364 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1365 return 0;
1366
1367 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1368 if (x == NULL)
1369 return 0;
1370
1371 spin_lock_bh(&x->lock);
1372 if (x->km.state == XFRM_STATE_ACQ) {
1373 x->km.state = XFRM_STATE_ERROR;
1374 wake_up(&km_waitq);
1375 }
1376 spin_unlock_bh(&x->lock);
1377 xfrm_state_put(x);
1378 return 0;
1379 }
1380
1381 static inline int event2poltype(int event)
1382 {
1383 switch (event) {
1384 case XFRM_MSG_DELPOLICY:
1385 return SADB_X_SPDDELETE;
1386 case XFRM_MSG_NEWPOLICY:
1387 return SADB_X_SPDADD;
1388 case XFRM_MSG_UPDPOLICY:
1389 return SADB_X_SPDUPDATE;
1390 case XFRM_MSG_POLEXPIRE:
1391 // return SADB_X_SPDEXPIRE;
1392 default:
1393 printk("pfkey: Unknown policy event %d\n", event);
1394 break;
1395 }
1396
1397 return 0;
1398 }
1399
1400 static inline int event2keytype(int event)
1401 {
1402 switch (event) {
1403 case XFRM_MSG_DELSA:
1404 return SADB_DELETE;
1405 case XFRM_MSG_NEWSA:
1406 return SADB_ADD;
1407 case XFRM_MSG_UPDSA:
1408 return SADB_UPDATE;
1409 case XFRM_MSG_EXPIRE:
1410 return SADB_EXPIRE;
1411 default:
1412 printk("pfkey: Unknown SA event %d\n", event);
1413 break;
1414 }
1415
1416 return 0;
1417 }
1418
1419 /* ADD/UPD/DEL */
1420 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1421 {
1422 struct sk_buff *skb;
1423 struct sadb_msg *hdr;
1424 int hsc = 3;
1425
1426 if (c->event == XFRM_MSG_DELSA)
1427 hsc = 0;
1428
1429 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1430
1431 if (IS_ERR(skb))
1432 return PTR_ERR(skb);
1433
1434 hdr = (struct sadb_msg *) skb->data;
1435 hdr->sadb_msg_version = PF_KEY_V2;
1436 hdr->sadb_msg_type = event2keytype(c->event);
1437 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1438 hdr->sadb_msg_errno = 0;
1439 hdr->sadb_msg_reserved = 0;
1440 hdr->sadb_msg_seq = c->seq;
1441 hdr->sadb_msg_pid = c->pid;
1442
1443 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1444
1445 return 0;
1446 }
1447
1448 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1449 {
1450 struct xfrm_state *x;
1451 int err;
1452 struct km_event c;
1453
1454 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1455 if (IS_ERR(x))
1456 return PTR_ERR(x);
1457
1458 xfrm_state_hold(x);
1459 if (hdr->sadb_msg_type == SADB_ADD)
1460 err = xfrm_state_add(x);
1461 else
1462 err = xfrm_state_update(x);
1463
1464 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1465 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
1466
1467 if (err < 0) {
1468 x->km.state = XFRM_STATE_DEAD;
1469 __xfrm_state_put(x);
1470 goto out;
1471 }
1472
1473 if (hdr->sadb_msg_type == SADB_ADD)
1474 c.event = XFRM_MSG_NEWSA;
1475 else
1476 c.event = XFRM_MSG_UPDSA;
1477 c.seq = hdr->sadb_msg_seq;
1478 c.pid = hdr->sadb_msg_pid;
1479 km_state_notify(x, &c);
1480 out:
1481 xfrm_state_put(x);
1482 return err;
1483 }
1484
1485 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1486 {
1487 struct xfrm_state *x;
1488 struct km_event c;
1489 int err;
1490
1491 if (!ext_hdrs[SADB_EXT_SA-1] ||
1492 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1493 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1494 return -EINVAL;
1495
1496 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1497 if (x == NULL)
1498 return -ESRCH;
1499
1500 if ((err = security_xfrm_state_delete(x)))
1501 goto out;
1502
1503 if (xfrm_state_kern(x)) {
1504 err = -EPERM;
1505 goto out;
1506 }
1507
1508 err = xfrm_state_delete(x);
1509
1510 if (err < 0)
1511 goto out;
1512
1513 c.seq = hdr->sadb_msg_seq;
1514 c.pid = hdr->sadb_msg_pid;
1515 c.event = XFRM_MSG_DELSA;
1516 km_state_notify(x, &c);
1517 out:
1518 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1519 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
1520 xfrm_state_put(x);
1521
1522 return err;
1523 }
1524
1525 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1526 {
1527 __u8 proto;
1528 struct sk_buff *out_skb;
1529 struct sadb_msg *out_hdr;
1530 struct xfrm_state *x;
1531
1532 if (!ext_hdrs[SADB_EXT_SA-1] ||
1533 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1534 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1535 return -EINVAL;
1536
1537 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1538 if (x == NULL)
1539 return -ESRCH;
1540
1541 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1542 proto = x->id.proto;
1543 xfrm_state_put(x);
1544 if (IS_ERR(out_skb))
1545 return PTR_ERR(out_skb);
1546
1547 out_hdr = (struct sadb_msg *) out_skb->data;
1548 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1549 out_hdr->sadb_msg_type = SADB_DUMP;
1550 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1551 out_hdr->sadb_msg_errno = 0;
1552 out_hdr->sadb_msg_reserved = 0;
1553 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1554 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1555 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1556
1557 return 0;
1558 }
1559
1560 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1561 gfp_t allocation)
1562 {
1563 struct sk_buff *skb;
1564 struct sadb_msg *hdr;
1565 int len, auth_len, enc_len, i;
1566
1567 auth_len = xfrm_count_auth_supported();
1568 if (auth_len) {
1569 auth_len *= sizeof(struct sadb_alg);
1570 auth_len += sizeof(struct sadb_supported);
1571 }
1572
1573 enc_len = xfrm_count_enc_supported();
1574 if (enc_len) {
1575 enc_len *= sizeof(struct sadb_alg);
1576 enc_len += sizeof(struct sadb_supported);
1577 }
1578
1579 len = enc_len + auth_len + sizeof(struct sadb_msg);
1580
1581 skb = alloc_skb(len + 16, allocation);
1582 if (!skb)
1583 goto out_put_algs;
1584
1585 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1586 pfkey_hdr_dup(hdr, orig);
1587 hdr->sadb_msg_errno = 0;
1588 hdr->sadb_msg_len = len / sizeof(uint64_t);
1589
1590 if (auth_len) {
1591 struct sadb_supported *sp;
1592 struct sadb_alg *ap;
1593
1594 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1595 ap = (struct sadb_alg *) (sp + 1);
1596
1597 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1598 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1599
1600 for (i = 0; ; i++) {
1601 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1602 if (!aalg)
1603 break;
1604 if (aalg->available)
1605 *ap++ = aalg->desc;
1606 }
1607 }
1608
1609 if (enc_len) {
1610 struct sadb_supported *sp;
1611 struct sadb_alg *ap;
1612
1613 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1614 ap = (struct sadb_alg *) (sp + 1);
1615
1616 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1617 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1618
1619 for (i = 0; ; i++) {
1620 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1621 if (!ealg)
1622 break;
1623 if (ealg->available)
1624 *ap++ = ealg->desc;
1625 }
1626 }
1627
1628 out_put_algs:
1629 return skb;
1630 }
1631
1632 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1633 {
1634 struct pfkey_sock *pfk = pfkey_sk(sk);
1635 struct sk_buff *supp_skb;
1636
1637 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1638 return -EINVAL;
1639
1640 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1641 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1642 return -EEXIST;
1643 pfk->registered |= (1<<hdr->sadb_msg_satype);
1644 }
1645
1646 xfrm_probe_algs();
1647
1648 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1649 if (!supp_skb) {
1650 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1651 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1652
1653 return -ENOBUFS;
1654 }
1655
1656 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1657
1658 return 0;
1659 }
1660
1661 static int key_notify_sa_flush(struct km_event *c)
1662 {
1663 struct sk_buff *skb;
1664 struct sadb_msg *hdr;
1665
1666 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1667 if (!skb)
1668 return -ENOBUFS;
1669 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1670 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1671 hdr->sadb_msg_type = SADB_FLUSH;
1672 hdr->sadb_msg_seq = c->seq;
1673 hdr->sadb_msg_pid = c->pid;
1674 hdr->sadb_msg_version = PF_KEY_V2;
1675 hdr->sadb_msg_errno = (uint8_t) 0;
1676 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1677
1678 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1679
1680 return 0;
1681 }
1682
1683 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1684 {
1685 unsigned proto;
1686 struct km_event c;
1687 struct xfrm_audit audit_info;
1688 int err;
1689
1690 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1691 if (proto == 0)
1692 return -EINVAL;
1693
1694 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1695 audit_info.secid = 0;
1696 err = xfrm_state_flush(proto, &audit_info);
1697 if (err)
1698 return err;
1699 c.data.proto = proto;
1700 c.seq = hdr->sadb_msg_seq;
1701 c.pid = hdr->sadb_msg_pid;
1702 c.event = XFRM_MSG_FLUSHSA;
1703 km_state_notify(NULL, &c);
1704
1705 return 0;
1706 }
1707
1708 struct pfkey_dump_data
1709 {
1710 struct sk_buff *skb;
1711 struct sadb_msg *hdr;
1712 struct sock *sk;
1713 };
1714
1715 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1716 {
1717 struct pfkey_dump_data *data = ptr;
1718 struct sk_buff *out_skb;
1719 struct sadb_msg *out_hdr;
1720
1721 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1722 if (IS_ERR(out_skb))
1723 return PTR_ERR(out_skb);
1724
1725 out_hdr = (struct sadb_msg *) out_skb->data;
1726 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1727 out_hdr->sadb_msg_type = SADB_DUMP;
1728 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1729 out_hdr->sadb_msg_errno = 0;
1730 out_hdr->sadb_msg_reserved = 0;
1731 out_hdr->sadb_msg_seq = count;
1732 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1733 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1734 return 0;
1735 }
1736
1737 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1738 {
1739 u8 proto;
1740 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1741
1742 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1743 if (proto == 0)
1744 return -EINVAL;
1745
1746 return xfrm_state_walk(proto, dump_sa, &data);
1747 }
1748
1749 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1750 {
1751 struct pfkey_sock *pfk = pfkey_sk(sk);
1752 int satype = hdr->sadb_msg_satype;
1753
1754 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1755 /* XXX we mangle packet... */
1756 hdr->sadb_msg_errno = 0;
1757 if (satype != 0 && satype != 1)
1758 return -EINVAL;
1759 pfk->promisc = satype;
1760 }
1761 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1762 return 0;
1763 }
1764
1765 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1766 {
1767 int i;
1768 u32 reqid = *(u32*)ptr;
1769
1770 for (i=0; i<xp->xfrm_nr; i++) {
1771 if (xp->xfrm_vec[i].reqid == reqid)
1772 return -EEXIST;
1773 }
1774 return 0;
1775 }
1776
1777 static u32 gen_reqid(void)
1778 {
1779 u32 start;
1780 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1781
1782 start = reqid;
1783 do {
1784 ++reqid;
1785 if (reqid == 0)
1786 reqid = IPSEC_MANUAL_REQID_MAX+1;
1787 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1788 (void*)&reqid) != -EEXIST)
1789 return reqid;
1790 } while (reqid != start);
1791 return 0;
1792 }
1793
1794 static int
1795 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1796 {
1797 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1798 struct sockaddr_in *sin;
1799 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1800 struct sockaddr_in6 *sin6;
1801 #endif
1802 int mode;
1803
1804 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1805 return -ELOOP;
1806
1807 if (rq->sadb_x_ipsecrequest_mode == 0)
1808 return -EINVAL;
1809
1810 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1811 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1812 return -EINVAL;
1813 t->mode = mode;
1814 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1815 t->optional = 1;
1816 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1817 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1818 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1819 t->reqid = 0;
1820 if (!t->reqid && !(t->reqid = gen_reqid()))
1821 return -ENOBUFS;
1822 }
1823
1824 /* addresses present only in tunnel mode */
1825 if (t->mode == XFRM_MODE_TUNNEL) {
1826 struct sockaddr *sa;
1827 sa = (struct sockaddr *)(rq+1);
1828 switch(sa->sa_family) {
1829 case AF_INET:
1830 sin = (struct sockaddr_in*)sa;
1831 t->saddr.a4 = sin->sin_addr.s_addr;
1832 sin++;
1833 if (sin->sin_family != AF_INET)
1834 return -EINVAL;
1835 t->id.daddr.a4 = sin->sin_addr.s_addr;
1836 break;
1837 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1838 case AF_INET6:
1839 sin6 = (struct sockaddr_in6*)sa;
1840 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1841 sin6++;
1842 if (sin6->sin6_family != AF_INET6)
1843 return -EINVAL;
1844 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1845 break;
1846 #endif
1847 default:
1848 return -EINVAL;
1849 }
1850 t->encap_family = sa->sa_family;
1851 } else
1852 t->encap_family = xp->family;
1853
1854 /* No way to set this via kame pfkey */
1855 t->aalgos = t->ealgos = t->calgos = ~0;
1856 xp->xfrm_nr++;
1857 return 0;
1858 }
1859
1860 static int
1861 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1862 {
1863 int err;
1864 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1865 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1866
1867 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1868 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1869 return err;
1870 len -= rq->sadb_x_ipsecrequest_len;
1871 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1872 }
1873 return 0;
1874 }
1875
1876 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1877 {
1878 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1879
1880 if (xfrm_ctx) {
1881 int len = sizeof(struct sadb_x_sec_ctx);
1882 len += xfrm_ctx->ctx_len;
1883 return PFKEY_ALIGN8(len);
1884 }
1885 return 0;
1886 }
1887
1888 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1889 {
1890 struct xfrm_tmpl *t;
1891 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1892 int socklen = 0;
1893 int i;
1894
1895 for (i=0; i<xp->xfrm_nr; i++) {
1896 t = xp->xfrm_vec + i;
1897 socklen += (t->encap_family == AF_INET ?
1898 sizeof(struct sockaddr_in) :
1899 sizeof(struct sockaddr_in6));
1900 }
1901
1902 return sizeof(struct sadb_msg) +
1903 (sizeof(struct sadb_lifetime) * 3) +
1904 (sizeof(struct sadb_address) * 2) +
1905 (sockaddr_size * 2) +
1906 sizeof(struct sadb_x_policy) +
1907 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1908 (socklen * 2) +
1909 pfkey_xfrm_policy2sec_ctx_size(xp);
1910 }
1911
1912 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1913 {
1914 struct sk_buff *skb;
1915 int size;
1916
1917 size = pfkey_xfrm_policy2msg_size(xp);
1918
1919 skb = alloc_skb(size + 16, GFP_ATOMIC);
1920 if (skb == NULL)
1921 return ERR_PTR(-ENOBUFS);
1922
1923 return skb;
1924 }
1925
1926 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1927 {
1928 struct sadb_msg *hdr;
1929 struct sadb_address *addr;
1930 struct sadb_lifetime *lifetime;
1931 struct sadb_x_policy *pol;
1932 struct sockaddr_in *sin;
1933 struct sadb_x_sec_ctx *sec_ctx;
1934 struct xfrm_sec_ctx *xfrm_ctx;
1935 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1936 struct sockaddr_in6 *sin6;
1937 #endif
1938 int i;
1939 int size;
1940 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1941 int socklen = (xp->family == AF_INET ?
1942 sizeof(struct sockaddr_in) :
1943 sizeof(struct sockaddr_in6));
1944
1945 size = pfkey_xfrm_policy2msg_size(xp);
1946
1947 /* call should fill header later */
1948 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1949 memset(hdr, 0, size); /* XXX do we need this ? */
1950
1951 /* src address */
1952 addr = (struct sadb_address*) skb_put(skb,
1953 sizeof(struct sadb_address)+sockaddr_size);
1954 addr->sadb_address_len =
1955 (sizeof(struct sadb_address)+sockaddr_size)/
1956 sizeof(uint64_t);
1957 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1958 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1959 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1960 addr->sadb_address_reserved = 0;
1961 /* src address */
1962 if (xp->family == AF_INET) {
1963 sin = (struct sockaddr_in *) (addr + 1);
1964 sin->sin_family = AF_INET;
1965 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1966 sin->sin_port = xp->selector.sport;
1967 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1968 }
1969 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1970 else if (xp->family == AF_INET6) {
1971 sin6 = (struct sockaddr_in6 *) (addr + 1);
1972 sin6->sin6_family = AF_INET6;
1973 sin6->sin6_port = xp->selector.sport;
1974 sin6->sin6_flowinfo = 0;
1975 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1976 sizeof(struct in6_addr));
1977 sin6->sin6_scope_id = 0;
1978 }
1979 #endif
1980 else
1981 BUG();
1982
1983 /* dst address */
1984 addr = (struct sadb_address*) skb_put(skb,
1985 sizeof(struct sadb_address)+sockaddr_size);
1986 addr->sadb_address_len =
1987 (sizeof(struct sadb_address)+sockaddr_size)/
1988 sizeof(uint64_t);
1989 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1990 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1991 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1992 addr->sadb_address_reserved = 0;
1993 if (xp->family == AF_INET) {
1994 sin = (struct sockaddr_in *) (addr + 1);
1995 sin->sin_family = AF_INET;
1996 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1997 sin->sin_port = xp->selector.dport;
1998 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1999 }
2000 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2001 else if (xp->family == AF_INET6) {
2002 sin6 = (struct sockaddr_in6 *) (addr + 1);
2003 sin6->sin6_family = AF_INET6;
2004 sin6->sin6_port = xp->selector.dport;
2005 sin6->sin6_flowinfo = 0;
2006 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2007 sizeof(struct in6_addr));
2008 sin6->sin6_scope_id = 0;
2009 }
2010 #endif
2011 else
2012 BUG();
2013
2014 /* hard time */
2015 lifetime = (struct sadb_lifetime *) skb_put(skb,
2016 sizeof(struct sadb_lifetime));
2017 lifetime->sadb_lifetime_len =
2018 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2019 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2020 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2021 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2022 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2023 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2024 /* soft time */
2025 lifetime = (struct sadb_lifetime *) skb_put(skb,
2026 sizeof(struct sadb_lifetime));
2027 lifetime->sadb_lifetime_len =
2028 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2029 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2030 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2031 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2032 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2033 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2034 /* current time */
2035 lifetime = (struct sadb_lifetime *) skb_put(skb,
2036 sizeof(struct sadb_lifetime));
2037 lifetime->sadb_lifetime_len =
2038 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2039 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2040 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2041 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2042 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2043 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2044
2045 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2046 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2047 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2048 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2049 if (xp->action == XFRM_POLICY_ALLOW) {
2050 if (xp->xfrm_nr)
2051 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2052 else
2053 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2054 }
2055 pol->sadb_x_policy_dir = dir+1;
2056 pol->sadb_x_policy_id = xp->index;
2057 pol->sadb_x_policy_priority = xp->priority;
2058
2059 for (i=0; i<xp->xfrm_nr; i++) {
2060 struct sadb_x_ipsecrequest *rq;
2061 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2062 int req_size;
2063 int mode;
2064
2065 req_size = sizeof(struct sadb_x_ipsecrequest);
2066 if (t->mode == XFRM_MODE_TUNNEL)
2067 req_size += ((t->encap_family == AF_INET ?
2068 sizeof(struct sockaddr_in) :
2069 sizeof(struct sockaddr_in6)) * 2);
2070 else
2071 size -= 2*socklen;
2072 rq = (void*)skb_put(skb, req_size);
2073 pol->sadb_x_policy_len += req_size/8;
2074 memset(rq, 0, sizeof(*rq));
2075 rq->sadb_x_ipsecrequest_len = req_size;
2076 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2077 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2078 return -EINVAL;
2079 rq->sadb_x_ipsecrequest_mode = mode;
2080 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2081 if (t->reqid)
2082 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2083 if (t->optional)
2084 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2085 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2086 if (t->mode == XFRM_MODE_TUNNEL) {
2087 switch (t->encap_family) {
2088 case AF_INET:
2089 sin = (void*)(rq+1);
2090 sin->sin_family = AF_INET;
2091 sin->sin_addr.s_addr = t->saddr.a4;
2092 sin->sin_port = 0;
2093 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2094 sin++;
2095 sin->sin_family = AF_INET;
2096 sin->sin_addr.s_addr = t->id.daddr.a4;
2097 sin->sin_port = 0;
2098 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2099 break;
2100 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2101 case AF_INET6:
2102 sin6 = (void*)(rq+1);
2103 sin6->sin6_family = AF_INET6;
2104 sin6->sin6_port = 0;
2105 sin6->sin6_flowinfo = 0;
2106 memcpy(&sin6->sin6_addr, t->saddr.a6,
2107 sizeof(struct in6_addr));
2108 sin6->sin6_scope_id = 0;
2109
2110 sin6++;
2111 sin6->sin6_family = AF_INET6;
2112 sin6->sin6_port = 0;
2113 sin6->sin6_flowinfo = 0;
2114 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2115 sizeof(struct in6_addr));
2116 sin6->sin6_scope_id = 0;
2117 break;
2118 #endif
2119 default:
2120 break;
2121 }
2122 }
2123 }
2124
2125 /* security context */
2126 if ((xfrm_ctx = xp->security)) {
2127 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2128
2129 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2130 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2131 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2132 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2133 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2134 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2135 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2136 xfrm_ctx->ctx_len);
2137 }
2138
2139 hdr->sadb_msg_len = size / sizeof(uint64_t);
2140 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2141
2142 return 0;
2143 }
2144
2145 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2146 {
2147 struct sk_buff *out_skb;
2148 struct sadb_msg *out_hdr;
2149 int err;
2150
2151 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2152 if (IS_ERR(out_skb)) {
2153 err = PTR_ERR(out_skb);
2154 goto out;
2155 }
2156 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2157 if (err < 0)
2158 return err;
2159
2160 out_hdr = (struct sadb_msg *) out_skb->data;
2161 out_hdr->sadb_msg_version = PF_KEY_V2;
2162
2163 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2164 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2165 else
2166 out_hdr->sadb_msg_type = event2poltype(c->event);
2167 out_hdr->sadb_msg_errno = 0;
2168 out_hdr->sadb_msg_seq = c->seq;
2169 out_hdr->sadb_msg_pid = c->pid;
2170 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2171 out:
2172 return 0;
2173
2174 }
2175
2176 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2177 {
2178 int err = 0;
2179 struct sadb_lifetime *lifetime;
2180 struct sadb_address *sa;
2181 struct sadb_x_policy *pol;
2182 struct xfrm_policy *xp;
2183 struct km_event c;
2184 struct sadb_x_sec_ctx *sec_ctx;
2185
2186 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2187 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2188 !ext_hdrs[SADB_X_EXT_POLICY-1])
2189 return -EINVAL;
2190
2191 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2192 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2193 return -EINVAL;
2194 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2195 return -EINVAL;
2196
2197 xp = xfrm_policy_alloc(GFP_KERNEL);
2198 if (xp == NULL)
2199 return -ENOBUFS;
2200
2201 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2202 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2203 xp->priority = pol->sadb_x_policy_priority;
2204
2205 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2206 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2207 if (!xp->family) {
2208 err = -EINVAL;
2209 goto out;
2210 }
2211 xp->selector.family = xp->family;
2212 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2213 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2214 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2215 if (xp->selector.sport)
2216 xp->selector.sport_mask = htons(0xffff);
2217
2218 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2219 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2220 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2221
2222 /* Amusing, we set this twice. KAME apps appear to set same value
2223 * in both addresses.
2224 */
2225 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2226
2227 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2228 if (xp->selector.dport)
2229 xp->selector.dport_mask = htons(0xffff);
2230
2231 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2232 if (sec_ctx != NULL) {
2233 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2234
2235 if (!uctx) {
2236 err = -ENOBUFS;
2237 goto out;
2238 }
2239
2240 err = security_xfrm_policy_alloc(xp, uctx);
2241 kfree(uctx);
2242
2243 if (err)
2244 goto out;
2245 }
2246
2247 xp->lft.soft_byte_limit = XFRM_INF;
2248 xp->lft.hard_byte_limit = XFRM_INF;
2249 xp->lft.soft_packet_limit = XFRM_INF;
2250 xp->lft.hard_packet_limit = XFRM_INF;
2251 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2252 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2253 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2254 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2255 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2256 }
2257 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2258 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2259 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2260 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2261 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2262 }
2263 xp->xfrm_nr = 0;
2264 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2265 (err = parse_ipsecrequests(xp, pol)) < 0)
2266 goto out;
2267
2268 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2269 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2270
2271 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2272 AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2273
2274 if (err)
2275 goto out;
2276
2277 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2278 c.event = XFRM_MSG_UPDPOLICY;
2279 else
2280 c.event = XFRM_MSG_NEWPOLICY;
2281
2282 c.seq = hdr->sadb_msg_seq;
2283 c.pid = hdr->sadb_msg_pid;
2284
2285 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2286 xfrm_pol_put(xp);
2287 return 0;
2288
2289 out:
2290 security_xfrm_policy_free(xp);
2291 kfree(xp);
2292 return err;
2293 }
2294
2295 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2296 {
2297 int err;
2298 struct sadb_address *sa;
2299 struct sadb_x_policy *pol;
2300 struct xfrm_policy *xp, tmp;
2301 struct xfrm_selector sel;
2302 struct km_event c;
2303 struct sadb_x_sec_ctx *sec_ctx;
2304
2305 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2306 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2307 !ext_hdrs[SADB_X_EXT_POLICY-1])
2308 return -EINVAL;
2309
2310 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2311 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2312 return -EINVAL;
2313
2314 memset(&sel, 0, sizeof(sel));
2315
2316 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2317 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2318 sel.prefixlen_s = sa->sadb_address_prefixlen;
2319 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2320 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2321 if (sel.sport)
2322 sel.sport_mask = htons(0xffff);
2323
2324 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2325 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2326 sel.prefixlen_d = sa->sadb_address_prefixlen;
2327 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2328 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2329 if (sel.dport)
2330 sel.dport_mask = htons(0xffff);
2331
2332 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2333 memset(&tmp, 0, sizeof(struct xfrm_policy));
2334
2335 if (sec_ctx != NULL) {
2336 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2337
2338 if (!uctx)
2339 return -ENOMEM;
2340
2341 err = security_xfrm_policy_alloc(&tmp, uctx);
2342 kfree(uctx);
2343
2344 if (err)
2345 return err;
2346 }
2347
2348 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2349 &sel, tmp.security, 1, &err);
2350 security_xfrm_policy_free(&tmp);
2351
2352 if (xp == NULL)
2353 return -ENOENT;
2354
2355 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2356 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2357
2358 if (err)
2359 goto out;
2360
2361 c.seq = hdr->sadb_msg_seq;
2362 c.pid = hdr->sadb_msg_pid;
2363 c.event = XFRM_MSG_DELPOLICY;
2364 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2365
2366 out:
2367 xfrm_pol_put(xp);
2368 return err;
2369 }
2370
2371 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2372 {
2373 int err;
2374 struct sk_buff *out_skb;
2375 struct sadb_msg *out_hdr;
2376 err = 0;
2377
2378 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2379 if (IS_ERR(out_skb)) {
2380 err = PTR_ERR(out_skb);
2381 goto out;
2382 }
2383 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2384 if (err < 0)
2385 goto out;
2386
2387 out_hdr = (struct sadb_msg *) out_skb->data;
2388 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2389 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2390 out_hdr->sadb_msg_satype = 0;
2391 out_hdr->sadb_msg_errno = 0;
2392 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2393 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2394 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2395 err = 0;
2396
2397 out:
2398 return err;
2399 }
2400
2401 #ifdef CONFIG_NET_KEY_MIGRATE
2402 static int pfkey_sockaddr_pair_size(sa_family_t family)
2403 {
2404 switch (family) {
2405 case AF_INET:
2406 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2407 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2408 case AF_INET6:
2409 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2410 #endif
2411 default:
2412 return 0;
2413 }
2414 /* NOTREACHED */
2415 }
2416
2417 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2418 xfrm_address_t *saddr, xfrm_address_t *daddr,
2419 u16 *family)
2420 {
2421 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2422 if (rq->sadb_x_ipsecrequest_len <
2423 pfkey_sockaddr_pair_size(sa->sa_family))
2424 return -EINVAL;
2425
2426 switch (sa->sa_family) {
2427 case AF_INET:
2428 {
2429 struct sockaddr_in *sin;
2430 sin = (struct sockaddr_in *)sa;
2431 if ((sin+1)->sin_family != AF_INET)
2432 return -EINVAL;
2433 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2434 sin++;
2435 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2436 *family = AF_INET;
2437 break;
2438 }
2439 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2440 case AF_INET6:
2441 {
2442 struct sockaddr_in6 *sin6;
2443 sin6 = (struct sockaddr_in6 *)sa;
2444 if ((sin6+1)->sin6_family != AF_INET6)
2445 return -EINVAL;
2446 memcpy(&saddr->a6, &sin6->sin6_addr,
2447 sizeof(saddr->a6));
2448 sin6++;
2449 memcpy(&daddr->a6, &sin6->sin6_addr,
2450 sizeof(daddr->a6));
2451 *family = AF_INET6;
2452 break;
2453 }
2454 #endif
2455 default:
2456 return -EINVAL;
2457 }
2458
2459 return 0;
2460 }
2461
2462 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2463 struct xfrm_migrate *m)
2464 {
2465 int err;
2466 struct sadb_x_ipsecrequest *rq2;
2467 int mode;
2468
2469 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2470 len < rq1->sadb_x_ipsecrequest_len)
2471 return -EINVAL;
2472
2473 /* old endoints */
2474 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2475 &m->old_family);
2476 if (err)
2477 return err;
2478
2479 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2480 len -= rq1->sadb_x_ipsecrequest_len;
2481
2482 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2483 len < rq2->sadb_x_ipsecrequest_len)
2484 return -EINVAL;
2485
2486 /* new endpoints */
2487 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2488 &m->new_family);
2489 if (err)
2490 return err;
2491
2492 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2493 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2494 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2495 return -EINVAL;
2496
2497 m->proto = rq1->sadb_x_ipsecrequest_proto;
2498 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2499 return -EINVAL;
2500 m->mode = mode;
2501 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2502
2503 return ((int)(rq1->sadb_x_ipsecrequest_len +
2504 rq2->sadb_x_ipsecrequest_len));
2505 }
2506
2507 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2508 struct sadb_msg *hdr, void **ext_hdrs)
2509 {
2510 int i, len, ret, err = -EINVAL;
2511 u8 dir;
2512 struct sadb_address *sa;
2513 struct sadb_x_policy *pol;
2514 struct sadb_x_ipsecrequest *rq;
2515 struct xfrm_selector sel;
2516 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2517
2518 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2519 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2520 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2521 err = -EINVAL;
2522 goto out;
2523 }
2524
2525 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2526 if (!pol) {
2527 err = -EINVAL;
2528 goto out;
2529 }
2530
2531 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2532 err = -EINVAL;
2533 goto out;
2534 }
2535
2536 dir = pol->sadb_x_policy_dir - 1;
2537 memset(&sel, 0, sizeof(sel));
2538
2539 /* set source address info of selector */
2540 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2541 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2542 sel.prefixlen_s = sa->sadb_address_prefixlen;
2543 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2544 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2545 if (sel.sport)
2546 sel.sport_mask = htons(0xffff);
2547
2548 /* set destination address info of selector */
2549 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2550 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2551 sel.prefixlen_d = sa->sadb_address_prefixlen;
2552 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2553 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2554 if (sel.dport)
2555 sel.dport_mask = htons(0xffff);
2556
2557 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2558
2559 /* extract ipsecrequests */
2560 i = 0;
2561 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2562
2563 while (len > 0 && i < XFRM_MAX_DEPTH) {
2564 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2565 if (ret < 0) {
2566 err = ret;
2567 goto out;
2568 } else {
2569 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2570 len -= ret;
2571 i++;
2572 }
2573 }
2574
2575 if (!i || len > 0) {
2576 err = -EINVAL;
2577 goto out;
2578 }
2579
2580 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2581
2582 out:
2583 return err;
2584 }
2585 #else
2586 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2587 struct sadb_msg *hdr, void **ext_hdrs)
2588 {
2589 return -ENOPROTOOPT;
2590 }
2591 #endif
2592
2593
2594 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2595 {
2596 unsigned int dir;
2597 int err = 0, delete;
2598 struct sadb_x_policy *pol;
2599 struct xfrm_policy *xp;
2600 struct km_event c;
2601
2602 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2603 return -EINVAL;
2604
2605 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2606 if (dir >= XFRM_POLICY_MAX)
2607 return -EINVAL;
2608
2609 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2610 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2611 delete, &err);
2612 if (xp == NULL)
2613 return -ENOENT;
2614
2615 if (delete) {
2616 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2617 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2618
2619 if (err)
2620 goto out;
2621 c.seq = hdr->sadb_msg_seq;
2622 c.pid = hdr->sadb_msg_pid;
2623 c.data.byid = 1;
2624 c.event = XFRM_MSG_DELPOLICY;
2625 km_policy_notify(xp, dir, &c);
2626 } else {
2627 err = key_pol_get_resp(sk, xp, hdr, dir);
2628 }
2629
2630 out:
2631 xfrm_pol_put(xp);
2632 return err;
2633 }
2634
2635 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2636 {
2637 struct pfkey_dump_data *data = ptr;
2638 struct sk_buff *out_skb;
2639 struct sadb_msg *out_hdr;
2640 int err;
2641
2642 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2643 if (IS_ERR(out_skb))
2644 return PTR_ERR(out_skb);
2645
2646 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2647 if (err < 0)
2648 return err;
2649
2650 out_hdr = (struct sadb_msg *) out_skb->data;
2651 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2652 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2653 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2654 out_hdr->sadb_msg_errno = 0;
2655 out_hdr->sadb_msg_seq = count;
2656 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2657 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2658 return 0;
2659 }
2660
2661 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2662 {
2663 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2664
2665 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2666 }
2667
2668 static int key_notify_policy_flush(struct km_event *c)
2669 {
2670 struct sk_buff *skb_out;
2671 struct sadb_msg *hdr;
2672
2673 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2674 if (!skb_out)
2675 return -ENOBUFS;
2676 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2677 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2678 hdr->sadb_msg_seq = c->seq;
2679 hdr->sadb_msg_pid = c->pid;
2680 hdr->sadb_msg_version = PF_KEY_V2;
2681 hdr->sadb_msg_errno = (uint8_t) 0;
2682 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2683 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2684 return 0;
2685
2686 }
2687
2688 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2689 {
2690 struct km_event c;
2691 struct xfrm_audit audit_info;
2692 int err;
2693
2694 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2695 audit_info.secid = 0;
2696 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2697 if (err)
2698 return err;
2699 c.data.type = XFRM_POLICY_TYPE_MAIN;
2700 c.event = XFRM_MSG_FLUSHPOLICY;
2701 c.pid = hdr->sadb_msg_pid;
2702 c.seq = hdr->sadb_msg_seq;
2703 km_policy_notify(NULL, 0, &c);
2704
2705 return 0;
2706 }
2707
2708 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2709 struct sadb_msg *hdr, void **ext_hdrs);
2710 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2711 [SADB_RESERVED] = pfkey_reserved,
2712 [SADB_GETSPI] = pfkey_getspi,
2713 [SADB_UPDATE] = pfkey_add,
2714 [SADB_ADD] = pfkey_add,
2715 [SADB_DELETE] = pfkey_delete,
2716 [SADB_GET] = pfkey_get,
2717 [SADB_ACQUIRE] = pfkey_acquire,
2718 [SADB_REGISTER] = pfkey_register,
2719 [SADB_EXPIRE] = NULL,
2720 [SADB_FLUSH] = pfkey_flush,
2721 [SADB_DUMP] = pfkey_dump,
2722 [SADB_X_PROMISC] = pfkey_promisc,
2723 [SADB_X_PCHANGE] = NULL,
2724 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2725 [SADB_X_SPDADD] = pfkey_spdadd,
2726 [SADB_X_SPDDELETE] = pfkey_spddelete,
2727 [SADB_X_SPDGET] = pfkey_spdget,
2728 [SADB_X_SPDACQUIRE] = NULL,
2729 [SADB_X_SPDDUMP] = pfkey_spddump,
2730 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2731 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2732 [SADB_X_SPDDELETE2] = pfkey_spdget,
2733 [SADB_X_MIGRATE] = pfkey_migrate,
2734 };
2735
2736 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2737 {
2738 void *ext_hdrs[SADB_EXT_MAX];
2739 int err;
2740
2741 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2742 BROADCAST_PROMISC_ONLY, NULL);
2743
2744 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2745 err = parse_exthdrs(skb, hdr, ext_hdrs);
2746 if (!err) {
2747 err = -EOPNOTSUPP;
2748 if (pfkey_funcs[hdr->sadb_msg_type])
2749 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2750 }
2751 return err;
2752 }
2753
2754 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2755 {
2756 struct sadb_msg *hdr = NULL;
2757
2758 if (skb->len < sizeof(*hdr)) {
2759 *errp = -EMSGSIZE;
2760 } else {
2761 hdr = (struct sadb_msg *) skb->data;
2762 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2763 hdr->sadb_msg_reserved != 0 ||
2764 (hdr->sadb_msg_type <= SADB_RESERVED ||
2765 hdr->sadb_msg_type > SADB_MAX)) {
2766 hdr = NULL;
2767 *errp = -EINVAL;
2768 } else if (hdr->sadb_msg_len != (skb->len /
2769 sizeof(uint64_t)) ||
2770 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2771 sizeof(uint64_t))) {
2772 hdr = NULL;
2773 *errp = -EMSGSIZE;
2774 } else {
2775 *errp = 0;
2776 }
2777 }
2778 return hdr;
2779 }
2780
2781 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2782 {
2783 return t->aalgos & (1 << d->desc.sadb_alg_id);
2784 }
2785
2786 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2787 {
2788 return t->ealgos & (1 << d->desc.sadb_alg_id);
2789 }
2790
2791 static int count_ah_combs(struct xfrm_tmpl *t)
2792 {
2793 int i, sz = 0;
2794
2795 for (i = 0; ; i++) {
2796 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2797 if (!aalg)
2798 break;
2799 if (aalg_tmpl_set(t, aalg) && aalg->available)
2800 sz += sizeof(struct sadb_comb);
2801 }
2802 return sz + sizeof(struct sadb_prop);
2803 }
2804
2805 static int count_esp_combs(struct xfrm_tmpl *t)
2806 {
2807 int i, k, sz = 0;
2808
2809 for (i = 0; ; i++) {
2810 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2811 if (!ealg)
2812 break;
2813
2814 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2815 continue;
2816
2817 for (k = 1; ; k++) {
2818 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2819 if (!aalg)
2820 break;
2821
2822 if (aalg_tmpl_set(t, aalg) && aalg->available)
2823 sz += sizeof(struct sadb_comb);
2824 }
2825 }
2826 return sz + sizeof(struct sadb_prop);
2827 }
2828
2829 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2830 {
2831 struct sadb_prop *p;
2832 int i;
2833
2834 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2835 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2836 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2837 p->sadb_prop_replay = 32;
2838 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2839
2840 for (i = 0; ; i++) {
2841 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2842 if (!aalg)
2843 break;
2844
2845 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2846 struct sadb_comb *c;
2847 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2848 memset(c, 0, sizeof(*c));
2849 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2850 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2851 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2852 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2853 c->sadb_comb_hard_addtime = 24*60*60;
2854 c->sadb_comb_soft_addtime = 20*60*60;
2855 c->sadb_comb_hard_usetime = 8*60*60;
2856 c->sadb_comb_soft_usetime = 7*60*60;
2857 }
2858 }
2859 }
2860
2861 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2862 {
2863 struct sadb_prop *p;
2864 int i, k;
2865
2866 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2867 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2868 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2869 p->sadb_prop_replay = 32;
2870 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2871
2872 for (i=0; ; i++) {
2873 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2874 if (!ealg)
2875 break;
2876
2877 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2878 continue;
2879
2880 for (k = 1; ; k++) {
2881 struct sadb_comb *c;
2882 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2883 if (!aalg)
2884 break;
2885 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2886 continue;
2887 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2888 memset(c, 0, sizeof(*c));
2889 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2890 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2891 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2892 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2893 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2894 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2895 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2896 c->sadb_comb_hard_addtime = 24*60*60;
2897 c->sadb_comb_soft_addtime = 20*60*60;
2898 c->sadb_comb_hard_usetime = 8*60*60;
2899 c->sadb_comb_soft_usetime = 7*60*60;
2900 }
2901 }
2902 }
2903
2904 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2905 {
2906 return 0;
2907 }
2908
2909 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2910 {
2911 struct sk_buff *out_skb;
2912 struct sadb_msg *out_hdr;
2913 int hard;
2914 int hsc;
2915
2916 hard = c->data.hard;
2917 if (hard)
2918 hsc = 2;
2919 else
2920 hsc = 1;
2921
2922 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2923 if (IS_ERR(out_skb))
2924 return PTR_ERR(out_skb);
2925
2926 out_hdr = (struct sadb_msg *) out_skb->data;
2927 out_hdr->sadb_msg_version = PF_KEY_V2;
2928 out_hdr->sadb_msg_type = SADB_EXPIRE;
2929 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2930 out_hdr->sadb_msg_errno = 0;
2931 out_hdr->sadb_msg_reserved = 0;
2932 out_hdr->sadb_msg_seq = 0;
2933 out_hdr->sadb_msg_pid = 0;
2934
2935 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2936 return 0;
2937 }
2938
2939 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2940 {
2941 switch (c->event) {
2942 case XFRM_MSG_EXPIRE:
2943 return key_notify_sa_expire(x, c);
2944 case XFRM_MSG_DELSA:
2945 case XFRM_MSG_NEWSA:
2946 case XFRM_MSG_UPDSA:
2947 return key_notify_sa(x, c);
2948 case XFRM_MSG_FLUSHSA:
2949 return key_notify_sa_flush(c);
2950 case XFRM_MSG_NEWAE: /* not yet supported */
2951 break;
2952 default:
2953 printk("pfkey: Unknown SA event %d\n", c->event);
2954 break;
2955 }
2956
2957 return 0;
2958 }
2959
2960 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2961 {
2962 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2963 return 0;
2964
2965 switch (c->event) {
2966 case XFRM_MSG_POLEXPIRE:
2967 return key_notify_policy_expire(xp, c);
2968 case XFRM_MSG_DELPOLICY:
2969 case XFRM_MSG_NEWPOLICY:
2970 case XFRM_MSG_UPDPOLICY:
2971 return key_notify_policy(xp, dir, c);
2972 case XFRM_MSG_FLUSHPOLICY:
2973 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2974 break;
2975 return key_notify_policy_flush(c);
2976 default:
2977 printk("pfkey: Unknown policy event %d\n", c->event);
2978 break;
2979 }
2980
2981 return 0;
2982 }
2983
2984 static u32 get_acqseq(void)
2985 {
2986 u32 res;
2987 static u32 acqseq;
2988 static DEFINE_SPINLOCK(acqseq_lock);
2989
2990 spin_lock_bh(&acqseq_lock);
2991 res = (++acqseq ? : ++acqseq);
2992 spin_unlock_bh(&acqseq_lock);
2993 return res;
2994 }
2995
2996 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2997 {
2998 struct sk_buff *skb;
2999 struct sadb_msg *hdr;
3000 struct sadb_address *addr;
3001 struct sadb_x_policy *pol;
3002 struct sockaddr_in *sin;
3003 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3004 struct sockaddr_in6 *sin6;
3005 #endif
3006 int sockaddr_size;
3007 int size;
3008 struct sadb_x_sec_ctx *sec_ctx;
3009 struct xfrm_sec_ctx *xfrm_ctx;
3010 int ctx_size = 0;
3011
3012 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3013 if (!sockaddr_size)
3014 return -EINVAL;
3015
3016 size = sizeof(struct sadb_msg) +
3017 (sizeof(struct sadb_address) * 2) +
3018 (sockaddr_size * 2) +
3019 sizeof(struct sadb_x_policy);
3020
3021 if (x->id.proto == IPPROTO_AH)
3022 size += count_ah_combs(t);
3023 else if (x->id.proto == IPPROTO_ESP)
3024 size += count_esp_combs(t);
3025
3026 if ((xfrm_ctx = x->security)) {
3027 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3028 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3029 }
3030
3031 skb = alloc_skb(size + 16, GFP_ATOMIC);
3032 if (skb == NULL)
3033 return -ENOMEM;
3034
3035 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3036 hdr->sadb_msg_version = PF_KEY_V2;
3037 hdr->sadb_msg_type = SADB_ACQUIRE;
3038 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3039 hdr->sadb_msg_len = size / sizeof(uint64_t);
3040 hdr->sadb_msg_errno = 0;
3041 hdr->sadb_msg_reserved = 0;
3042 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3043 hdr->sadb_msg_pid = 0;
3044
3045 /* src address */
3046 addr = (struct sadb_address*) skb_put(skb,
3047 sizeof(struct sadb_address)+sockaddr_size);
3048 addr->sadb_address_len =
3049 (sizeof(struct sadb_address)+sockaddr_size)/
3050 sizeof(uint64_t);
3051 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3052 addr->sadb_address_proto = 0;
3053 addr->sadb_address_reserved = 0;
3054 if (x->props.family == AF_INET) {
3055 addr->sadb_address_prefixlen = 32;
3056
3057 sin = (struct sockaddr_in *) (addr + 1);
3058 sin->sin_family = AF_INET;
3059 sin->sin_addr.s_addr = x->props.saddr.a4;
3060 sin->sin_port = 0;
3061 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3062 }
3063 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3064 else if (x->props.family == AF_INET6) {
3065 addr->sadb_address_prefixlen = 128;
3066
3067 sin6 = (struct sockaddr_in6 *) (addr + 1);
3068 sin6->sin6_family = AF_INET6;
3069 sin6->sin6_port = 0;
3070 sin6->sin6_flowinfo = 0;
3071 memcpy(&sin6->sin6_addr,
3072 x->props.saddr.a6, sizeof(struct in6_addr));
3073 sin6->sin6_scope_id = 0;
3074 }
3075 #endif
3076 else
3077 BUG();
3078
3079 /* dst address */
3080 addr = (struct sadb_address*) skb_put(skb,
3081 sizeof(struct sadb_address)+sockaddr_size);
3082 addr->sadb_address_len =
3083 (sizeof(struct sadb_address)+sockaddr_size)/
3084 sizeof(uint64_t);
3085 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3086 addr->sadb_address_proto = 0;
3087 addr->sadb_address_reserved = 0;
3088 if (x->props.family == AF_INET) {
3089 addr->sadb_address_prefixlen = 32;
3090
3091 sin = (struct sockaddr_in *) (addr + 1);
3092 sin->sin_family = AF_INET;
3093 sin->sin_addr.s_addr = x->id.daddr.a4;
3094 sin->sin_port = 0;
3095 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3096 }
3097 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3098 else if (x->props.family == AF_INET6) {
3099 addr->sadb_address_prefixlen = 128;
3100
3101 sin6 = (struct sockaddr_in6 *) (addr + 1);
3102 sin6->sin6_family = AF_INET6;
3103 sin6->sin6_port = 0;
3104 sin6->sin6_flowinfo = 0;
3105 memcpy(&sin6->sin6_addr,
3106 x->id.daddr.a6, sizeof(struct in6_addr));
3107 sin6->sin6_scope_id = 0;
3108 }
3109 #endif
3110 else
3111 BUG();
3112
3113 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3114 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3115 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3116 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3117 pol->sadb_x_policy_dir = dir+1;
3118 pol->sadb_x_policy_id = xp->index;
3119
3120 /* Set sadb_comb's. */
3121 if (x->id.proto == IPPROTO_AH)
3122 dump_ah_combs(skb, t);
3123 else if (x->id.proto == IPPROTO_ESP)
3124 dump_esp_combs(skb, t);
3125
3126 /* security context */
3127 if (xfrm_ctx) {
3128 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3129 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3130 sec_ctx->sadb_x_sec_len =
3131 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3132 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3133 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3134 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3135 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3136 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3137 xfrm_ctx->ctx_len);
3138 }
3139
3140 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3141 }
3142
3143 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3144 u8 *data, int len, int *dir)
3145 {
3146 struct xfrm_policy *xp;
3147 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3148 struct sadb_x_sec_ctx *sec_ctx;
3149
3150 switch (sk->sk_family) {
3151 case AF_INET:
3152 if (opt != IP_IPSEC_POLICY) {
3153 *dir = -EOPNOTSUPP;
3154 return NULL;
3155 }
3156 break;
3157 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3158 case AF_INET6:
3159 if (opt != IPV6_IPSEC_POLICY) {
3160 *dir = -EOPNOTSUPP;
3161 return NULL;
3162 }
3163 break;
3164 #endif
3165 default:
3166 *dir = -EINVAL;
3167 return NULL;
3168 }
3169
3170 *dir = -EINVAL;
3171
3172 if (len < sizeof(struct sadb_x_policy) ||
3173 pol->sadb_x_policy_len*8 > len ||
3174 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3175 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3176 return NULL;
3177
3178 xp = xfrm_policy_alloc(GFP_ATOMIC);
3179 if (xp == NULL) {
3180 *dir = -ENOBUFS;
3181 return NULL;
3182 }
3183
3184 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3185 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3186
3187 xp->lft.soft_byte_limit = XFRM_INF;
3188 xp->lft.hard_byte_limit = XFRM_INF;
3189 xp->lft.soft_packet_limit = XFRM_INF;
3190 xp->lft.hard_packet_limit = XFRM_INF;
3191 xp->family = sk->sk_family;
3192
3193 xp->xfrm_nr = 0;
3194 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3195 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3196 goto out;
3197
3198 /* security context too */
3199 if (len >= (pol->sadb_x_policy_len*8 +
3200 sizeof(struct sadb_x_sec_ctx))) {
3201 char *p = (char *)pol;
3202 struct xfrm_user_sec_ctx *uctx;
3203
3204 p += pol->sadb_x_policy_len*8;
3205 sec_ctx = (struct sadb_x_sec_ctx *)p;
3206 if (len < pol->sadb_x_policy_len*8 +
3207 sec_ctx->sadb_x_sec_len) {
3208 *dir = -EINVAL;
3209 goto out;
3210 }
3211 if ((*dir = verify_sec_ctx_len(p)))
3212 goto out;
3213 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3214 *dir = security_xfrm_policy_alloc(xp, uctx);
3215 kfree(uctx);
3216
3217 if (*dir)
3218 goto out;
3219 }
3220
3221 *dir = pol->sadb_x_policy_dir-1;
3222 return xp;
3223
3224 out:
3225 security_xfrm_policy_free(xp);
3226 kfree(xp);
3227 return NULL;
3228 }
3229
3230 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3231 {
3232 struct sk_buff *skb;
3233 struct sadb_msg *hdr;
3234 struct sadb_sa *sa;
3235 struct sadb_address *addr;
3236 struct sadb_x_nat_t_port *n_port;
3237 struct sockaddr_in *sin;
3238 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3239 struct sockaddr_in6 *sin6;
3240 #endif
3241 int sockaddr_size;
3242 int size;
3243 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3244 struct xfrm_encap_tmpl *natt = NULL;
3245
3246 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3247 if (!sockaddr_size)
3248 return -EINVAL;
3249
3250 if (!satype)
3251 return -EINVAL;
3252
3253 if (!x->encap)
3254 return -EINVAL;
3255
3256 natt = x->encap;
3257
3258 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3259 *
3260 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3261 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3262 */
3263
3264 size = sizeof(struct sadb_msg) +
3265 sizeof(struct sadb_sa) +
3266 (sizeof(struct sadb_address) * 2) +
3267 (sockaddr_size * 2) +
3268 (sizeof(struct sadb_x_nat_t_port) * 2);
3269
3270 skb = alloc_skb(size + 16, GFP_ATOMIC);
3271 if (skb == NULL)
3272 return -ENOMEM;
3273
3274 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3275 hdr->sadb_msg_version = PF_KEY_V2;
3276 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3277 hdr->sadb_msg_satype = satype;
3278 hdr->sadb_msg_len = size / sizeof(uint64_t);
3279 hdr->sadb_msg_errno = 0;
3280 hdr->sadb_msg_reserved = 0;
3281 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3282 hdr->sadb_msg_pid = 0;
3283
3284 /* SA */
3285 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3286 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3287 sa->sadb_sa_exttype = SADB_EXT_SA;
3288 sa->sadb_sa_spi = x->id.spi;
3289 sa->sadb_sa_replay = 0;
3290 sa->sadb_sa_state = 0;
3291 sa->sadb_sa_auth = 0;
3292 sa->sadb_sa_encrypt = 0;
3293 sa->sadb_sa_flags = 0;
3294
3295 /* ADDRESS_SRC (old addr) */
3296 addr = (struct sadb_address*)
3297 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3298 addr->sadb_address_len =
3299 (sizeof(struct sadb_address)+sockaddr_size)/
3300 sizeof(uint64_t);
3301 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3302 addr->sadb_address_proto = 0;
3303 addr->sadb_address_reserved = 0;
3304 if (x->props.family == AF_INET) {
3305 addr->sadb_address_prefixlen = 32;
3306
3307 sin = (struct sockaddr_in *) (addr + 1);
3308 sin->sin_family = AF_INET;
3309 sin->sin_addr.s_addr = x->props.saddr.a4;
3310 sin->sin_port = 0;
3311 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3312 }
3313 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3314 else if (x->props.family == AF_INET6) {
3315 addr->sadb_address_prefixlen = 128;
3316
3317 sin6 = (struct sockaddr_in6 *) (addr + 1);
3318 sin6->sin6_family = AF_INET6;
3319 sin6->sin6_port = 0;
3320 sin6->sin6_flowinfo = 0;
3321 memcpy(&sin6->sin6_addr,
3322 x->props.saddr.a6, sizeof(struct in6_addr));
3323 sin6->sin6_scope_id = 0;
3324 }
3325 #endif
3326 else
3327 BUG();
3328
3329 /* NAT_T_SPORT (old port) */
3330 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3331 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3332 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3333 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3334 n_port->sadb_x_nat_t_port_reserved = 0;
3335
3336 /* ADDRESS_DST (new addr) */
3337 addr = (struct sadb_address*)
3338 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3339 addr->sadb_address_len =
3340 (sizeof(struct sadb_address)+sockaddr_size)/
3341 sizeof(uint64_t);
3342 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3343 addr->sadb_address_proto = 0;
3344 addr->sadb_address_reserved = 0;
3345 if (x->props.family == AF_INET) {
3346 addr->sadb_address_prefixlen = 32;
3347
3348 sin = (struct sockaddr_in *) (addr + 1);
3349 sin->sin_family = AF_INET;
3350 sin->sin_addr.s_addr = ipaddr->a4;
3351 sin->sin_port = 0;
3352 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3353 }
3354 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3355 else if (x->props.family == AF_INET6) {
3356 addr->sadb_address_prefixlen = 128;
3357
3358 sin6 = (struct sockaddr_in6 *) (addr + 1);
3359 sin6->sin6_family = AF_INET6;
3360 sin6->sin6_port = 0;
3361 sin6->sin6_flowinfo = 0;
3362 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3363 sin6->sin6_scope_id = 0;
3364 }
3365 #endif
3366 else
3367 BUG();
3368
3369 /* NAT_T_DPORT (new port) */
3370 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3371 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3372 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3373 n_port->sadb_x_nat_t_port_port = sport;
3374 n_port->sadb_x_nat_t_port_reserved = 0;
3375
3376 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3377 }
3378
3379 #ifdef CONFIG_NET_KEY_MIGRATE
3380 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3381 struct xfrm_selector *sel)
3382 {
3383 struct sadb_address *addr;
3384 struct sockaddr_in *sin;
3385 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3386 struct sockaddr_in6 *sin6;
3387 #endif
3388 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3389 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3390 addr->sadb_address_exttype = type;
3391 addr->sadb_address_proto = sel->proto;
3392 addr->sadb_address_reserved = 0;
3393
3394 switch (type) {
3395 case SADB_EXT_ADDRESS_SRC:
3396 if (sel->family == AF_INET) {
3397 addr->sadb_address_prefixlen = sel->prefixlen_s;
3398 sin = (struct sockaddr_in *)(addr + 1);
3399 sin->sin_family = AF_INET;
3400 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3401 sizeof(sin->sin_addr.s_addr));
3402 sin->sin_port = 0;
3403 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3404 }
3405 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3406 else if (sel->family == AF_INET6) {
3407 addr->sadb_address_prefixlen = sel->prefixlen_s;
3408 sin6 = (struct sockaddr_in6 *)(addr + 1);
3409 sin6->sin6_family = AF_INET6;
3410 sin6->sin6_port = 0;
3411 sin6->sin6_flowinfo = 0;
3412 sin6->sin6_scope_id = 0;
3413 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3414 sizeof(sin6->sin6_addr.s6_addr));
3415 }
3416 #endif
3417 break;
3418 case SADB_EXT_ADDRESS_DST:
3419 if (sel->family == AF_INET) {
3420 addr->sadb_address_prefixlen = sel->prefixlen_d;
3421 sin = (struct sockaddr_in *)(addr + 1);
3422 sin->sin_family = AF_INET;
3423 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3424 sizeof(sin->sin_addr.s_addr));
3425 sin->sin_port = 0;
3426 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3427 }
3428 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3429 else if (sel->family == AF_INET6) {
3430 addr->sadb_address_prefixlen = sel->prefixlen_d;
3431 sin6 = (struct sockaddr_in6 *)(addr + 1);
3432 sin6->sin6_family = AF_INET6;
3433 sin6->sin6_port = 0;
3434 sin6->sin6_flowinfo = 0;
3435 sin6->sin6_scope_id = 0;
3436 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3437 sizeof(sin6->sin6_addr.s6_addr));
3438 }
3439 #endif
3440 break;
3441 default:
3442 return -EINVAL;
3443 }
3444
3445 return 0;
3446 }
3447
3448 static int set_ipsecrequest(struct sk_buff *skb,
3449 uint8_t proto, uint8_t mode, int level,
3450 uint32_t reqid, uint8_t family,
3451 xfrm_address_t *src, xfrm_address_t *dst)
3452 {
3453 struct sadb_x_ipsecrequest *rq;
3454 struct sockaddr_in *sin;
3455 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3456 struct sockaddr_in6 *sin6;
3457 #endif
3458 int size_req;
3459
3460 size_req = sizeof(struct sadb_x_ipsecrequest) +
3461 pfkey_sockaddr_pair_size(family);
3462
3463 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3464 memset(rq, 0, size_req);
3465 rq->sadb_x_ipsecrequest_len = size_req;
3466 rq->sadb_x_ipsecrequest_proto = proto;
3467 rq->sadb_x_ipsecrequest_mode = mode;
3468 rq->sadb_x_ipsecrequest_level = level;
3469 rq->sadb_x_ipsecrequest_reqid = reqid;
3470
3471 switch (family) {
3472 case AF_INET:
3473 sin = (struct sockaddr_in *)(rq + 1);
3474 sin->sin_family = AF_INET;
3475 memcpy(&sin->sin_addr.s_addr, src,
3476 sizeof(sin->sin_addr.s_addr));
3477 sin++;
3478 sin->sin_family = AF_INET;
3479 memcpy(&sin->sin_addr.s_addr, dst,
3480 sizeof(sin->sin_addr.s_addr));
3481 break;
3482 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3483 case AF_INET6:
3484 sin6 = (struct sockaddr_in6 *)(rq + 1);
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, src,
3490 sizeof(sin6->sin6_addr.s6_addr));
3491 sin6++;
3492 sin6->sin6_family = AF_INET6;
3493 sin6->sin6_port = 0;
3494 sin6->sin6_flowinfo = 0;
3495 sin6->sin6_scope_id = 0;
3496 memcpy(&sin6->sin6_addr.s6_addr, dst,
3497 sizeof(sin6->sin6_addr.s6_addr));
3498 break;
3499 #endif
3500 default:
3501 return -EINVAL;
3502 }
3503
3504 return 0;
3505 }
3506 #endif
3507
3508 #ifdef CONFIG_NET_KEY_MIGRATE
3509 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3510 struct xfrm_migrate *m, int num_bundles)
3511 {
3512 int i;
3513 int sasize_sel;
3514 int size = 0;
3515 int size_pol = 0;
3516 struct sk_buff *skb;
3517 struct sadb_msg *hdr;
3518 struct sadb_x_policy *pol;
3519 struct xfrm_migrate *mp;
3520
3521 if (type != XFRM_POLICY_TYPE_MAIN)
3522 return 0;
3523
3524 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3525 return -EINVAL;
3526
3527 /* selector */
3528 sasize_sel = pfkey_sockaddr_size(sel->family);
3529 if (!sasize_sel)
3530 return -EINVAL;
3531 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3532
3533 /* policy info */
3534 size_pol += sizeof(struct sadb_x_policy);
3535
3536 /* ipsecrequests */
3537 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3538 /* old locator pair */
3539 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3540 pfkey_sockaddr_pair_size(mp->old_family);
3541 /* new locator pair */
3542 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3543 pfkey_sockaddr_pair_size(mp->new_family);
3544 }
3545
3546 size += sizeof(struct sadb_msg) + size_pol;
3547
3548 /* alloc buffer */
3549 skb = alloc_skb(size, GFP_ATOMIC);
3550 if (skb == NULL)
3551 return -ENOMEM;
3552
3553 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3554 hdr->sadb_msg_version = PF_KEY_V2;
3555 hdr->sadb_msg_type = SADB_X_MIGRATE;
3556 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3557 hdr->sadb_msg_len = size / 8;
3558 hdr->sadb_msg_errno = 0;
3559 hdr->sadb_msg_reserved = 0;
3560 hdr->sadb_msg_seq = 0;
3561 hdr->sadb_msg_pid = 0;
3562
3563 /* selector src */
3564 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3565
3566 /* selector dst */
3567 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3568
3569 /* policy information */
3570 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3571 pol->sadb_x_policy_len = size_pol / 8;
3572 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3573 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3574 pol->sadb_x_policy_dir = dir + 1;
3575 pol->sadb_x_policy_id = 0;
3576 pol->sadb_x_policy_priority = 0;
3577
3578 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3579 /* old ipsecrequest */
3580 int mode = pfkey_mode_from_xfrm(mp->mode);
3581 if (mode < 0)
3582 return -EINVAL;
3583 if (set_ipsecrequest(skb, mp->proto, mode,
3584 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3585 mp->reqid, mp->old_family,
3586 &mp->old_saddr, &mp->old_daddr) < 0) {
3587 return -EINVAL;
3588 }
3589
3590 /* new ipsecrequest */
3591 if (set_ipsecrequest(skb, mp->proto, mode,
3592 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3593 mp->reqid, mp->new_family,
3594 &mp->new_saddr, &mp->new_daddr) < 0) {
3595 return -EINVAL;
3596 }
3597 }
3598
3599 /* broadcast migrate message to sockets */
3600 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3601
3602 return 0;
3603 }
3604 #else
3605 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3606 struct xfrm_migrate *m, int num_bundles)
3607 {
3608 return -ENOPROTOOPT;
3609 }
3610 #endif
3611
3612 static int pfkey_sendmsg(struct kiocb *kiocb,
3613 struct socket *sock, struct msghdr *msg, size_t len)
3614 {
3615 struct sock *sk = sock->sk;
3616 struct sk_buff *skb = NULL;
3617 struct sadb_msg *hdr = NULL;
3618 int err;
3619
3620 err = -EOPNOTSUPP;
3621 if (msg->msg_flags & MSG_OOB)
3622 goto out;
3623
3624 err = -EMSGSIZE;
3625 if ((unsigned)len > sk->sk_sndbuf - 32)
3626 goto out;
3627
3628 err = -ENOBUFS;
3629 skb = alloc_skb(len, GFP_KERNEL);
3630 if (skb == NULL)
3631 goto out;
3632
3633 err = -EFAULT;
3634 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3635 goto out;
3636
3637 hdr = pfkey_get_base_msg(skb, &err);
3638 if (!hdr)
3639 goto out;
3640
3641 mutex_lock(&xfrm_cfg_mutex);
3642 err = pfkey_process(sk, skb, hdr);
3643 mutex_unlock(&xfrm_cfg_mutex);
3644
3645 out:
3646 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3647 err = 0;
3648 if (skb)
3649 kfree_skb(skb);
3650
3651 return err ? : len;
3652 }
3653
3654 static int pfkey_recvmsg(struct kiocb *kiocb,
3655 struct socket *sock, struct msghdr *msg, size_t len,
3656 int flags)
3657 {
3658 struct sock *sk = sock->sk;
3659 struct sk_buff *skb;
3660 int copied, err;
3661
3662 err = -EINVAL;
3663 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3664 goto out;
3665
3666 msg->msg_namelen = 0;
3667 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3668 if (skb == NULL)
3669 goto out;
3670
3671 copied = skb->len;
3672 if (copied > len) {
3673 msg->msg_flags |= MSG_TRUNC;
3674 copied = len;
3675 }
3676
3677 skb_reset_transport_header(skb);
3678 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3679 if (err)
3680 goto out_free;
3681
3682 sock_recv_timestamp(msg, sk, skb);
3683
3684 err = (flags & MSG_TRUNC) ? skb->len : copied;
3685
3686 out_free:
3687 skb_free_datagram(sk, skb);
3688 out:
3689 return err;
3690 }
3691
3692 static const struct proto_ops pfkey_ops = {
3693 .family = PF_KEY,
3694 .owner = THIS_MODULE,
3695 /* Operations that make no sense on pfkey sockets. */
3696 .bind = sock_no_bind,
3697 .connect = sock_no_connect,
3698 .socketpair = sock_no_socketpair,
3699 .accept = sock_no_accept,
3700 .getname = sock_no_getname,
3701 .ioctl = sock_no_ioctl,
3702 .listen = sock_no_listen,
3703 .shutdown = sock_no_shutdown,
3704 .setsockopt = sock_no_setsockopt,
3705 .getsockopt = sock_no_getsockopt,
3706 .mmap = sock_no_mmap,
3707 .sendpage = sock_no_sendpage,
3708
3709 /* Now the operations that really occur. */
3710 .release = pfkey_release,
3711 .poll = datagram_poll,
3712 .sendmsg = pfkey_sendmsg,
3713 .recvmsg = pfkey_recvmsg,
3714 };
3715
3716 static struct net_proto_family pfkey_family_ops = {
3717 .family = PF_KEY,
3718 .create = pfkey_create,
3719 .owner = THIS_MODULE,
3720 };
3721
3722 #ifdef CONFIG_PROC_FS
3723 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3724 int length, int *eof, void *data)
3725 {
3726 off_t pos = 0;
3727 off_t begin = 0;
3728 int len = 0;
3729 struct sock *s;
3730 struct hlist_node *node;
3731
3732 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3733
3734 read_lock(&pfkey_table_lock);
3735
3736 sk_for_each(s, node, &pfkey_table) {
3737 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3738 s,
3739 atomic_read(&s->sk_refcnt),
3740 atomic_read(&s->sk_rmem_alloc),
3741 atomic_read(&s->sk_wmem_alloc),
3742 sock_i_uid(s),
3743 sock_i_ino(s)
3744 );
3745
3746 buffer[len++] = '\n';
3747
3748 pos = begin + len;
3749 if (pos < offset) {
3750 len = 0;
3751 begin = pos;
3752 }
3753 if(pos > offset + length)
3754 goto done;
3755 }
3756 *eof = 1;
3757
3758 done:
3759 read_unlock(&pfkey_table_lock);
3760
3761 *start = buffer + (offset - begin);
3762 len -= (offset - begin);
3763
3764 if (len > length)
3765 len = length;
3766 if (len < 0)
3767 len = 0;
3768
3769 return len;
3770 }
3771 #endif
3772
3773 static struct xfrm_mgr pfkeyv2_mgr =
3774 {
3775 .id = "pfkeyv2",
3776 .notify = pfkey_send_notify,
3777 .acquire = pfkey_send_acquire,
3778 .compile_policy = pfkey_compile_policy,
3779 .new_mapping = pfkey_send_new_mapping,
3780 .notify_policy = pfkey_send_policy_notify,
3781 .migrate = pfkey_send_migrate,
3782 };
3783
3784 static void __exit ipsec_pfkey_exit(void)
3785 {
3786 xfrm_unregister_km(&pfkeyv2_mgr);
3787 remove_proc_entry("net/pfkey", NULL);
3788 sock_unregister(PF_KEY);
3789 proto_unregister(&key_proto);
3790 }
3791
3792 static int __init ipsec_pfkey_init(void)
3793 {
3794 int err = proto_register(&key_proto, 0);
3795
3796 if (err != 0)
3797 goto out;
3798
3799 err = sock_register(&pfkey_family_ops);
3800 if (err != 0)
3801 goto out_unregister_key_proto;
3802 #ifdef CONFIG_PROC_FS
3803 err = -ENOMEM;
3804 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3805 goto out_sock_unregister;
3806 #endif
3807 err = xfrm_register_km(&pfkeyv2_mgr);
3808 if (err != 0)
3809 goto out_remove_proc_entry;
3810 out:
3811 return err;
3812 out_remove_proc_entry:
3813 #ifdef CONFIG_PROC_FS
3814 remove_proc_entry("net/pfkey", NULL);
3815 out_sock_unregister:
3816 #endif
3817 sock_unregister(PF_KEY);
3818 out_unregister_key_proto:
3819 proto_unregister(&key_proto);
3820 goto out;
3821 }
3822
3823 module_init(ipsec_pfkey_init);
3824 module_exit(ipsec_pfkey_exit);
3825 MODULE_LICENSE("GPL");
3826 MODULE_ALIAS_NETPROTO(PF_KEY);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree