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net/* misc endianness annotations
[usb.git] / net / key / af_key.c
blob7b0a95abe934b471183bd88c9cc5d4928499f9c1
1 /*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/in.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <net/xfrm.h>
30 #include <linux/audit.h>
31
32 #include <net/sock.h>
33
34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
36
37
38 /* List of all pfkey sockets. */
39 static HLIST_HEAD(pfkey_table);
40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41 static DEFINE_RWLOCK(pfkey_table_lock);
42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43
44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
45
46 struct pfkey_sock {
47 /* struct sock must be the first member of struct pfkey_sock */
48 struct sock sk;
49 int registered;
50 int promisc;
51 };
52
53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54 {
55 return (struct pfkey_sock *)sk;
56 }
57
58 static void pfkey_sock_destruct(struct sock *sk)
59 {
60 skb_queue_purge(&sk->sk_receive_queue);
61
62 if (!sock_flag(sk, SOCK_DEAD)) {
63 printk("Attempt to release alive pfkey socket: %p\n", sk);
64 return;
65 }
66
67 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69
70 atomic_dec(&pfkey_socks_nr);
71 }
72
73 static void pfkey_table_grab(void)
74 {
75 write_lock_bh(&pfkey_table_lock);
76
77 if (atomic_read(&pfkey_table_users)) {
78 DECLARE_WAITQUEUE(wait, current);
79
80 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81 for(;;) {
82 set_current_state(TASK_UNINTERRUPTIBLE);
83 if (atomic_read(&pfkey_table_users) == 0)
84 break;
85 write_unlock_bh(&pfkey_table_lock);
86 schedule();
87 write_lock_bh(&pfkey_table_lock);
88 }
89
90 __set_current_state(TASK_RUNNING);
91 remove_wait_queue(&pfkey_table_wait, &wait);
92 }
93 }
94
95 static __inline__ void pfkey_table_ungrab(void)
96 {
97 write_unlock_bh(&pfkey_table_lock);
98 wake_up(&pfkey_table_wait);
99 }
100
101 static __inline__ void pfkey_lock_table(void)
102 {
103 /* read_lock() synchronizes us to pfkey_table_grab */
104
105 read_lock(&pfkey_table_lock);
106 atomic_inc(&pfkey_table_users);
107 read_unlock(&pfkey_table_lock);
108 }
109
110 static __inline__ void pfkey_unlock_table(void)
111 {
112 if (atomic_dec_and_test(&pfkey_table_users))
113 wake_up(&pfkey_table_wait);
114 }
115
116
117 static const struct proto_ops pfkey_ops;
118
119 static void pfkey_insert(struct sock *sk)
120 {
121 pfkey_table_grab();
122 sk_add_node(sk, &pfkey_table);
123 pfkey_table_ungrab();
124 }
125
126 static void pfkey_remove(struct sock *sk)
127 {
128 pfkey_table_grab();
129 sk_del_node_init(sk);
130 pfkey_table_ungrab();
131 }
132
133 static struct proto key_proto = {
134 .name = "KEY",
135 .owner = THIS_MODULE,
136 .obj_size = sizeof(struct pfkey_sock),
137 };
138
139 static int pfkey_create(struct socket *sock, int protocol)
140 {
141 struct sock *sk;
142 int err;
143
144 if (!capable(CAP_NET_ADMIN))
145 return -EPERM;
146 if (sock->type != SOCK_RAW)
147 return -ESOCKTNOSUPPORT;
148 if (protocol != PF_KEY_V2)
149 return -EPROTONOSUPPORT;
150
151 err = -ENOMEM;
152 sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
153 if (sk == NULL)
154 goto out;
155
156 sock->ops = &pfkey_ops;
157 sock_init_data(sock, sk);
158
159 sk->sk_family = PF_KEY;
160 sk->sk_destruct = pfkey_sock_destruct;
161
162 atomic_inc(&pfkey_socks_nr);
163
164 pfkey_insert(sk);
165
166 return 0;
167 out:
168 return err;
169 }
170
171 static int pfkey_release(struct socket *sock)
172 {
173 struct sock *sk = sock->sk;
174
175 if (!sk)
176 return 0;
177
178 pfkey_remove(sk);
179
180 sock_orphan(sk);
181 sock->sk = NULL;
182 skb_queue_purge(&sk->sk_write_queue);
183 sock_put(sk);
184
185 return 0;
186 }
187
188 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
189 gfp_t allocation, struct sock *sk)
190 {
191 int err = -ENOBUFS;
192
193 sock_hold(sk);
194 if (*skb2 == NULL) {
195 if (atomic_read(&skb->users) != 1) {
196 *skb2 = skb_clone(skb, allocation);
197 } else {
198 *skb2 = skb;
199 atomic_inc(&skb->users);
200 }
201 }
202 if (*skb2 != NULL) {
203 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
204 skb_orphan(*skb2);
205 skb_set_owner_r(*skb2, sk);
206 skb_queue_tail(&sk->sk_receive_queue, *skb2);
207 sk->sk_data_ready(sk, (*skb2)->len);
208 *skb2 = NULL;
209 err = 0;
210 }
211 }
212 sock_put(sk);
213 return err;
214 }
215
216 /* Send SKB to all pfkey sockets matching selected criteria. */
217 #define BROADCAST_ALL 0
218 #define BROADCAST_ONE 1
219 #define BROADCAST_REGISTERED 2
220 #define BROADCAST_PROMISC_ONLY 4
221 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
222 int broadcast_flags, struct sock *one_sk)
223 {
224 struct sock *sk;
225 struct hlist_node *node;
226 struct sk_buff *skb2 = NULL;
227 int err = -ESRCH;
228
229 /* XXX Do we need something like netlink_overrun? I think
230 * XXX PF_KEY socket apps will not mind current behavior.
231 */
232 if (!skb)
233 return -ENOMEM;
234
235 pfkey_lock_table();
236 sk_for_each(sk, node, &pfkey_table) {
237 struct pfkey_sock *pfk = pfkey_sk(sk);
238 int err2;
239
240 /* Yes, it means that if you are meant to receive this
241 * pfkey message you receive it twice as promiscuous
242 * socket.
243 */
244 if (pfk->promisc)
245 pfkey_broadcast_one(skb, &skb2, allocation, sk);
246
247 /* the exact target will be processed later */
248 if (sk == one_sk)
249 continue;
250 if (broadcast_flags != BROADCAST_ALL) {
251 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
252 continue;
253 if ((broadcast_flags & BROADCAST_REGISTERED) &&
254 !pfk->registered)
255 continue;
256 if (broadcast_flags & BROADCAST_ONE)
257 continue;
258 }
259
260 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
261
262 /* Error is cleare after succecful sending to at least one
263 * registered KM */
264 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
265 err = err2;
266 }
267 pfkey_unlock_table();
268
269 if (one_sk != NULL)
270 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
271
272 if (skb2)
273 kfree_skb(skb2);
274 kfree_skb(skb);
275 return err;
276 }
277
278 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
279 {
280 *new = *orig;
281 }
282
283 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
284 {
285 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
286 struct sadb_msg *hdr;
287
288 if (!skb)
289 return -ENOBUFS;
290
291 /* Woe be to the platform trying to support PFKEY yet
292 * having normal errnos outside the 1-255 range, inclusive.
293 */
294 err = -err;
295 if (err == ERESTARTSYS ||
296 err == ERESTARTNOHAND ||
297 err == ERESTARTNOINTR)
298 err = EINTR;
299 if (err >= 512)
300 err = EINVAL;
301 BUG_ON(err <= 0 || err >= 256);
302
303 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
304 pfkey_hdr_dup(hdr, orig);
305 hdr->sadb_msg_errno = (uint8_t) err;
306 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
307 sizeof(uint64_t));
308
309 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
310
311 return 0;
312 }
313
314 static u8 sadb_ext_min_len[] = {
315 [SADB_EXT_RESERVED] = (u8) 0,
316 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
317 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
318 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
319 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
320 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
321 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
322 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
323 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
324 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
325 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
326 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
327 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
328 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
329 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
330 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
331 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
332 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
333 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
334 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
335 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
336 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
337 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
338 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
339 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
340 };
341
342 /* Verify sadb_address_{len,prefixlen} against sa_family. */
343 static int verify_address_len(void *p)
344 {
345 struct sadb_address *sp = p;
346 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
347 struct sockaddr_in *sin;
348 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
349 struct sockaddr_in6 *sin6;
350 #endif
351 int len;
352
353 switch (addr->sa_family) {
354 case AF_INET:
355 len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
356 len /= sizeof(uint64_t);
357 if (sp->sadb_address_len != len ||
358 sp->sadb_address_prefixlen > 32)
359 return -EINVAL;
360 break;
361 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
362 case AF_INET6:
363 len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
364 len /= sizeof(uint64_t);
365 if (sp->sadb_address_len != len ||
366 sp->sadb_address_prefixlen > 128)
367 return -EINVAL;
368 break;
369 #endif
370 default:
371 /* It is user using kernel to keep track of security
372 * associations for another protocol, such as
373 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
374 * lengths.
375 *
376 * XXX Actually, association/policy database is not yet
377 * XXX able to cope with arbitrary sockaddr families.
378 * XXX When it can, remove this -EINVAL. -DaveM
379 */
380 return -EINVAL;
381 break;
382 }
383
384 return 0;
385 }
386
387 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
388 {
389 int len = 0;
390
391 len += sizeof(struct sadb_x_sec_ctx);
392 len += sec_ctx->sadb_x_ctx_len;
393 len += sizeof(uint64_t) - 1;
394 len /= sizeof(uint64_t);
395
396 return len;
397 }
398
399 static inline int verify_sec_ctx_len(void *p)
400 {
401 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
402 int len;
403
404 if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
405 return -EINVAL;
406
407 len = pfkey_sec_ctx_len(sec_ctx);
408
409 if (sec_ctx->sadb_x_sec_len != len)
410 return -EINVAL;
411
412 return 0;
413 }
414
415 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
416 {
417 struct xfrm_user_sec_ctx *uctx = NULL;
418 int ctx_size = sec_ctx->sadb_x_ctx_len;
419
420 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
421
422 if (!uctx)
423 return NULL;
424
425 uctx->len = pfkey_sec_ctx_len(sec_ctx);
426 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
427 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
428 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
429 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
430 memcpy(uctx + 1, sec_ctx + 1,
431 uctx->ctx_len);
432
433 return uctx;
434 }
435
436 static int present_and_same_family(struct sadb_address *src,
437 struct sadb_address *dst)
438 {
439 struct sockaddr *s_addr, *d_addr;
440
441 if (!src || !dst)
442 return 0;
443
444 s_addr = (struct sockaddr *)(src + 1);
445 d_addr = (struct sockaddr *)(dst + 1);
446 if (s_addr->sa_family != d_addr->sa_family)
447 return 0;
448 if (s_addr->sa_family != AF_INET
449 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
450 && s_addr->sa_family != AF_INET6
451 #endif
452 )
453 return 0;
454
455 return 1;
456 }
457
458 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
459 {
460 char *p = (char *) hdr;
461 int len = skb->len;
462
463 len -= sizeof(*hdr);
464 p += sizeof(*hdr);
465 while (len > 0) {
466 struct sadb_ext *ehdr = (struct sadb_ext *) p;
467 uint16_t ext_type;
468 int ext_len;
469
470 ext_len = ehdr->sadb_ext_len;
471 ext_len *= sizeof(uint64_t);
472 ext_type = ehdr->sadb_ext_type;
473 if (ext_len < sizeof(uint64_t) ||
474 ext_len > len ||
475 ext_type == SADB_EXT_RESERVED)
476 return -EINVAL;
477
478 if (ext_type <= SADB_EXT_MAX) {
479 int min = (int) sadb_ext_min_len[ext_type];
480 if (ext_len < min)
481 return -EINVAL;
482 if (ext_hdrs[ext_type-1] != NULL)
483 return -EINVAL;
484 if (ext_type == SADB_EXT_ADDRESS_SRC ||
485 ext_type == SADB_EXT_ADDRESS_DST ||
486 ext_type == SADB_EXT_ADDRESS_PROXY ||
487 ext_type == SADB_X_EXT_NAT_T_OA) {
488 if (verify_address_len(p))
489 return -EINVAL;
490 }
491 if (ext_type == SADB_X_EXT_SEC_CTX) {
492 if (verify_sec_ctx_len(p))
493 return -EINVAL;
494 }
495 ext_hdrs[ext_type-1] = p;
496 }
497 p += ext_len;
498 len -= ext_len;
499 }
500
501 return 0;
502 }
503
504 static uint16_t
505 pfkey_satype2proto(uint8_t satype)
506 {
507 switch (satype) {
508 case SADB_SATYPE_UNSPEC:
509 return IPSEC_PROTO_ANY;
510 case SADB_SATYPE_AH:
511 return IPPROTO_AH;
512 case SADB_SATYPE_ESP:
513 return IPPROTO_ESP;
514 case SADB_X_SATYPE_IPCOMP:
515 return IPPROTO_COMP;
516 break;
517 default:
518 return 0;
519 }
520 /* NOTREACHED */
521 }
522
523 static uint8_t
524 pfkey_proto2satype(uint16_t proto)
525 {
526 switch (proto) {
527 case IPPROTO_AH:
528 return SADB_SATYPE_AH;
529 case IPPROTO_ESP:
530 return SADB_SATYPE_ESP;
531 case IPPROTO_COMP:
532 return SADB_X_SATYPE_IPCOMP;
533 break;
534 default:
535 return 0;
536 }
537 /* NOTREACHED */
538 }
539
540 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
541 * say specifically 'just raw sockets' as we encode them as 255.
542 */
543
544 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
545 {
546 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
547 }
548
549 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
550 {
551 return (proto ? proto : IPSEC_PROTO_ANY);
552 }
553
554 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
555 xfrm_address_t *xaddr)
556 {
557 switch (((struct sockaddr*)(addr + 1))->sa_family) {
558 case AF_INET:
559 xaddr->a4 =
560 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
561 return AF_INET;
562 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
563 case AF_INET6:
564 memcpy(xaddr->a6,
565 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
566 sizeof(struct in6_addr));
567 return AF_INET6;
568 #endif
569 default:
570 return 0;
571 }
572 /* NOTREACHED */
573 }
574
575 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
576 {
577 struct sadb_sa *sa;
578 struct sadb_address *addr;
579 uint16_t proto;
580 unsigned short family;
581 xfrm_address_t *xaddr;
582
583 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
584 if (sa == NULL)
585 return NULL;
586
587 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
588 if (proto == 0)
589 return NULL;
590
591 /* sadb_address_len should be checked by caller */
592 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
593 if (addr == NULL)
594 return NULL;
595
596 family = ((struct sockaddr *)(addr + 1))->sa_family;
597 switch (family) {
598 case AF_INET:
599 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
600 break;
601 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
602 case AF_INET6:
603 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
604 break;
605 #endif
606 default:
607 xaddr = NULL;
608 }
609
610 if (!xaddr)
611 return NULL;
612
613 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
614 }
615
616 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
617 static int
618 pfkey_sockaddr_size(sa_family_t family)
619 {
620 switch (family) {
621 case AF_INET:
622 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
623 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
624 case AF_INET6:
625 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
626 #endif
627 default:
628 return 0;
629 }
630 /* NOTREACHED */
631 }
632
633 static inline int pfkey_mode_from_xfrm(int mode)
634 {
635 switch(mode) {
636 case XFRM_MODE_TRANSPORT:
637 return IPSEC_MODE_TRANSPORT;
638 case XFRM_MODE_TUNNEL:
639 return IPSEC_MODE_TUNNEL;
640 case XFRM_MODE_BEET:
641 return IPSEC_MODE_BEET;
642 default:
643 return -1;
644 }
645 }
646
647 static inline int pfkey_mode_to_xfrm(int mode)
648 {
649 switch(mode) {
650 case IPSEC_MODE_ANY: /*XXX*/
651 case IPSEC_MODE_TRANSPORT:
652 return XFRM_MODE_TRANSPORT;
653 case IPSEC_MODE_TUNNEL:
654 return XFRM_MODE_TUNNEL;
655 case IPSEC_MODE_BEET:
656 return XFRM_MODE_BEET;
657 default:
658 return -1;
659 }
660 }
661
662 static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
663 {
664 struct sk_buff *skb;
665 struct sadb_msg *hdr;
666 struct sadb_sa *sa;
667 struct sadb_lifetime *lifetime;
668 struct sadb_address *addr;
669 struct sadb_key *key;
670 struct sadb_x_sa2 *sa2;
671 struct sockaddr_in *sin;
672 struct sadb_x_sec_ctx *sec_ctx;
673 struct xfrm_sec_ctx *xfrm_ctx;
674 int ctx_size = 0;
675 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
676 struct sockaddr_in6 *sin6;
677 #endif
678 int size;
679 int auth_key_size = 0;
680 int encrypt_key_size = 0;
681 int sockaddr_size;
682 struct xfrm_encap_tmpl *natt = NULL;
683 int mode;
684
685 /* address family check */
686 sockaddr_size = pfkey_sockaddr_size(x->props.family);
687 if (!sockaddr_size)
688 return ERR_PTR(-EINVAL);
689
690 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
691 key(AE), (identity(SD),) (sensitivity)> */
692 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
693 sizeof(struct sadb_lifetime) +
694 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
695 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
696 sizeof(struct sadb_address)*2 +
697 sockaddr_size*2 +
698 sizeof(struct sadb_x_sa2);
699
700 if ((xfrm_ctx = x->security)) {
701 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
702 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
703 }
704
705 /* identity & sensitivity */
706
707 if ((x->props.family == AF_INET &&
708 x->sel.saddr.a4 != x->props.saddr.a4)
709 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
710 || (x->props.family == AF_INET6 &&
711 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
712 #endif
713 )
714 size += sizeof(struct sadb_address) + sockaddr_size;
715
716 if (add_keys) {
717 if (x->aalg && x->aalg->alg_key_len) {
718 auth_key_size =
719 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
720 size += sizeof(struct sadb_key) + auth_key_size;
721 }
722 if (x->ealg && x->ealg->alg_key_len) {
723 encrypt_key_size =
724 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
725 size += sizeof(struct sadb_key) + encrypt_key_size;
726 }
727 }
728 if (x->encap)
729 natt = x->encap;
730
731 if (natt && natt->encap_type) {
732 size += sizeof(struct sadb_x_nat_t_type);
733 size += sizeof(struct sadb_x_nat_t_port);
734 size += sizeof(struct sadb_x_nat_t_port);
735 }
736
737 skb = alloc_skb(size + 16, GFP_ATOMIC);
738 if (skb == NULL)
739 return ERR_PTR(-ENOBUFS);
740
741 /* call should fill header later */
742 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
743 memset(hdr, 0, size); /* XXX do we need this ? */
744 hdr->sadb_msg_len = size / sizeof(uint64_t);
745
746 /* sa */
747 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
748 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
749 sa->sadb_sa_exttype = SADB_EXT_SA;
750 sa->sadb_sa_spi = x->id.spi;
751 sa->sadb_sa_replay = x->props.replay_window;
752 switch (x->km.state) {
753 case XFRM_STATE_VALID:
754 sa->sadb_sa_state = x->km.dying ?
755 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
756 break;
757 case XFRM_STATE_ACQ:
758 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
759 break;
760 default:
761 sa->sadb_sa_state = SADB_SASTATE_DEAD;
762 break;
763 }
764 sa->sadb_sa_auth = 0;
765 if (x->aalg) {
766 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
767 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
768 }
769 sa->sadb_sa_encrypt = 0;
770 BUG_ON(x->ealg && x->calg);
771 if (x->ealg) {
772 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
773 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
774 }
775 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
776 if (x->calg) {
777 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
778 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
779 }
780
781 sa->sadb_sa_flags = 0;
782 if (x->props.flags & XFRM_STATE_NOECN)
783 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
784 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
785 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
786 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
787 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
788
789 /* hard time */
790 if (hsc & 2) {
791 lifetime = (struct sadb_lifetime *) skb_put(skb,
792 sizeof(struct sadb_lifetime));
793 lifetime->sadb_lifetime_len =
794 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
795 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
796 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
797 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
798 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
799 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
800 }
801 /* soft time */
802 if (hsc & 1) {
803 lifetime = (struct sadb_lifetime *) skb_put(skb,
804 sizeof(struct sadb_lifetime));
805 lifetime->sadb_lifetime_len =
806 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
807 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
808 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
809 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
810 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
811 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
812 }
813 /* current time */
814 lifetime = (struct sadb_lifetime *) skb_put(skb,
815 sizeof(struct sadb_lifetime));
816 lifetime->sadb_lifetime_len =
817 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
818 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
819 lifetime->sadb_lifetime_allocations = x->curlft.packets;
820 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
821 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
822 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
823 /* src address */
824 addr = (struct sadb_address*) skb_put(skb,
825 sizeof(struct sadb_address)+sockaddr_size);
826 addr->sadb_address_len =
827 (sizeof(struct sadb_address)+sockaddr_size)/
828 sizeof(uint64_t);
829 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
830 /* "if the ports are non-zero, then the sadb_address_proto field,
831 normally zero, MUST be filled in with the transport
832 protocol's number." - RFC2367 */
833 addr->sadb_address_proto = 0;
834 addr->sadb_address_reserved = 0;
835 if (x->props.family == AF_INET) {
836 addr->sadb_address_prefixlen = 32;
837
838 sin = (struct sockaddr_in *) (addr + 1);
839 sin->sin_family = AF_INET;
840 sin->sin_addr.s_addr = x->props.saddr.a4;
841 sin->sin_port = 0;
842 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
843 }
844 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
845 else if (x->props.family == AF_INET6) {
846 addr->sadb_address_prefixlen = 128;
847
848 sin6 = (struct sockaddr_in6 *) (addr + 1);
849 sin6->sin6_family = AF_INET6;
850 sin6->sin6_port = 0;
851 sin6->sin6_flowinfo = 0;
852 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
853 sizeof(struct in6_addr));
854 sin6->sin6_scope_id = 0;
855 }
856 #endif
857 else
858 BUG();
859
860 /* dst address */
861 addr = (struct sadb_address*) skb_put(skb,
862 sizeof(struct sadb_address)+sockaddr_size);
863 addr->sadb_address_len =
864 (sizeof(struct sadb_address)+sockaddr_size)/
865 sizeof(uint64_t);
866 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
867 addr->sadb_address_proto = 0;
868 addr->sadb_address_prefixlen = 32; /* XXX */
869 addr->sadb_address_reserved = 0;
870 if (x->props.family == AF_INET) {
871 sin = (struct sockaddr_in *) (addr + 1);
872 sin->sin_family = AF_INET;
873 sin->sin_addr.s_addr = x->id.daddr.a4;
874 sin->sin_port = 0;
875 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
876
877 if (x->sel.saddr.a4 != x->props.saddr.a4) {
878 addr = (struct sadb_address*) skb_put(skb,
879 sizeof(struct sadb_address)+sockaddr_size);
880 addr->sadb_address_len =
881 (sizeof(struct sadb_address)+sockaddr_size)/
882 sizeof(uint64_t);
883 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
884 addr->sadb_address_proto =
885 pfkey_proto_from_xfrm(x->sel.proto);
886 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
887 addr->sadb_address_reserved = 0;
888
889 sin = (struct sockaddr_in *) (addr + 1);
890 sin->sin_family = AF_INET;
891 sin->sin_addr.s_addr = x->sel.saddr.a4;
892 sin->sin_port = x->sel.sport;
893 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
894 }
895 }
896 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
897 else if (x->props.family == AF_INET6) {
898 addr->sadb_address_prefixlen = 128;
899
900 sin6 = (struct sockaddr_in6 *) (addr + 1);
901 sin6->sin6_family = AF_INET6;
902 sin6->sin6_port = 0;
903 sin6->sin6_flowinfo = 0;
904 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
905 sin6->sin6_scope_id = 0;
906
907 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
908 sizeof(struct in6_addr))) {
909 addr = (struct sadb_address *) skb_put(skb,
910 sizeof(struct sadb_address)+sockaddr_size);
911 addr->sadb_address_len =
912 (sizeof(struct sadb_address)+sockaddr_size)/
913 sizeof(uint64_t);
914 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
915 addr->sadb_address_proto =
916 pfkey_proto_from_xfrm(x->sel.proto);
917 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
918 addr->sadb_address_reserved = 0;
919
920 sin6 = (struct sockaddr_in6 *) (addr + 1);
921 sin6->sin6_family = AF_INET6;
922 sin6->sin6_port = x->sel.sport;
923 sin6->sin6_flowinfo = 0;
924 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
925 sizeof(struct in6_addr));
926 sin6->sin6_scope_id = 0;
927 }
928 }
929 #endif
930 else
931 BUG();
932
933 /* auth key */
934 if (add_keys && auth_key_size) {
935 key = (struct sadb_key *) skb_put(skb,
936 sizeof(struct sadb_key)+auth_key_size);
937 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
938 sizeof(uint64_t);
939 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
940 key->sadb_key_bits = x->aalg->alg_key_len;
941 key->sadb_key_reserved = 0;
942 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
943 }
944 /* encrypt key */
945 if (add_keys && encrypt_key_size) {
946 key = (struct sadb_key *) skb_put(skb,
947 sizeof(struct sadb_key)+encrypt_key_size);
948 key->sadb_key_len = (sizeof(struct sadb_key) +
949 encrypt_key_size) / sizeof(uint64_t);
950 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
951 key->sadb_key_bits = x->ealg->alg_key_len;
952 key->sadb_key_reserved = 0;
953 memcpy(key + 1, x->ealg->alg_key,
954 (x->ealg->alg_key_len+7)/8);
955 }
956
957 /* sa */
958 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
959 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
960 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
961 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
962 kfree_skb(skb);
963 return ERR_PTR(-EINVAL);
964 }
965 sa2->sadb_x_sa2_mode = mode;
966 sa2->sadb_x_sa2_reserved1 = 0;
967 sa2->sadb_x_sa2_reserved2 = 0;
968 sa2->sadb_x_sa2_sequence = 0;
969 sa2->sadb_x_sa2_reqid = x->props.reqid;
970
971 if (natt && natt->encap_type) {
972 struct sadb_x_nat_t_type *n_type;
973 struct sadb_x_nat_t_port *n_port;
974
975 /* type */
976 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
977 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
978 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
979 n_type->sadb_x_nat_t_type_type = natt->encap_type;
980 n_type->sadb_x_nat_t_type_reserved[0] = 0;
981 n_type->sadb_x_nat_t_type_reserved[1] = 0;
982 n_type->sadb_x_nat_t_type_reserved[2] = 0;
983
984 /* source port */
985 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
986 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
987 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
988 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
989 n_port->sadb_x_nat_t_port_reserved = 0;
990
991 /* dest port */
992 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
993 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
994 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
995 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
996 n_port->sadb_x_nat_t_port_reserved = 0;
997 }
998
999 /* security context */
1000 if (xfrm_ctx) {
1001 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1002 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1003 sec_ctx->sadb_x_sec_len =
1004 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1005 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1006 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1007 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1008 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1009 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1010 xfrm_ctx->ctx_len);
1011 }
1012
1013 return skb;
1014 }
1015
1016 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1017 void **ext_hdrs)
1018 {
1019 struct xfrm_state *x;
1020 struct sadb_lifetime *lifetime;
1021 struct sadb_sa *sa;
1022 struct sadb_key *key;
1023 struct sadb_x_sec_ctx *sec_ctx;
1024 uint16_t proto;
1025 int err;
1026
1027
1028 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1029 if (!sa ||
1030 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1031 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1032 return ERR_PTR(-EINVAL);
1033 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1034 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1035 return ERR_PTR(-EINVAL);
1036 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1037 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1038 return ERR_PTR(-EINVAL);
1039 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1040 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1041 return ERR_PTR(-EINVAL);
1042
1043 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1044 if (proto == 0)
1045 return ERR_PTR(-EINVAL);
1046
1047 /* default error is no buffer space */
1048 err = -ENOBUFS;
1049
1050 /* RFC2367:
1051
1052 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1053 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1054 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1055 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1056 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1057 not true.
1058
1059 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1060 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1061 */
1062 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1063 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1064 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1065 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1066 return ERR_PTR(-EINVAL);
1067 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1068 if (key != NULL &&
1069 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1070 ((key->sadb_key_bits+7) / 8 == 0 ||
1071 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1072 return ERR_PTR(-EINVAL);
1073 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1074 if (key != NULL &&
1075 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1076 ((key->sadb_key_bits+7) / 8 == 0 ||
1077 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1078 return ERR_PTR(-EINVAL);
1079
1080 x = xfrm_state_alloc();
1081 if (x == NULL)
1082 return ERR_PTR(-ENOBUFS);
1083
1084 x->id.proto = proto;
1085 x->id.spi = sa->sadb_sa_spi;
1086 x->props.replay_window = sa->sadb_sa_replay;
1087 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1088 x->props.flags |= XFRM_STATE_NOECN;
1089 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1090 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1091 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1092 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1093
1094 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1095 if (lifetime != NULL) {
1096 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1097 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1098 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1099 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1100 }
1101 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1102 if (lifetime != NULL) {
1103 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1104 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1105 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1106 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1107 }
1108
1109 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1110 if (sec_ctx != NULL) {
1111 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1112
1113 if (!uctx)
1114 goto out;
1115
1116 err = security_xfrm_state_alloc(x, uctx);
1117 kfree(uctx);
1118
1119 if (err)
1120 goto out;
1121 }
1122
1123 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1124 if (sa->sadb_sa_auth) {
1125 int keysize = 0;
1126 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1127 if (!a) {
1128 err = -ENOSYS;
1129 goto out;
1130 }
1131 if (key)
1132 keysize = (key->sadb_key_bits + 7) / 8;
1133 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1134 if (!x->aalg)
1135 goto out;
1136 strcpy(x->aalg->alg_name, a->name);
1137 x->aalg->alg_key_len = 0;
1138 if (key) {
1139 x->aalg->alg_key_len = key->sadb_key_bits;
1140 memcpy(x->aalg->alg_key, key+1, keysize);
1141 }
1142 x->props.aalgo = sa->sadb_sa_auth;
1143 /* x->algo.flags = sa->sadb_sa_flags; */
1144 }
1145 if (sa->sadb_sa_encrypt) {
1146 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1147 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1148 if (!a) {
1149 err = -ENOSYS;
1150 goto out;
1151 }
1152 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1153 if (!x->calg)
1154 goto out;
1155 strcpy(x->calg->alg_name, a->name);
1156 x->props.calgo = sa->sadb_sa_encrypt;
1157 } else {
1158 int keysize = 0;
1159 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1160 if (!a) {
1161 err = -ENOSYS;
1162 goto out;
1163 }
1164 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1165 if (key)
1166 keysize = (key->sadb_key_bits + 7) / 8;
1167 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1168 if (!x->ealg)
1169 goto out;
1170 strcpy(x->ealg->alg_name, a->name);
1171 x->ealg->alg_key_len = 0;
1172 if (key) {
1173 x->ealg->alg_key_len = key->sadb_key_bits;
1174 memcpy(x->ealg->alg_key, key+1, keysize);
1175 }
1176 x->props.ealgo = sa->sadb_sa_encrypt;
1177 }
1178 }
1179 /* x->algo.flags = sa->sadb_sa_flags; */
1180
1181 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1182 &x->props.saddr);
1183 if (!x->props.family) {
1184 err = -EAFNOSUPPORT;
1185 goto out;
1186 }
1187 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1188 &x->id.daddr);
1189
1190 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1191 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1192 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1193 if (mode < 0) {
1194 err = -EINVAL;
1195 goto out;
1196 }
1197 x->props.mode = mode;
1198 x->props.reqid = sa2->sadb_x_sa2_reqid;
1199 }
1200
1201 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1202 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1203
1204 /* Nobody uses this, but we try. */
1205 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1206 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1207 }
1208
1209 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1210 struct sadb_x_nat_t_type* n_type;
1211 struct xfrm_encap_tmpl *natt;
1212
1213 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1214 if (!x->encap)
1215 goto out;
1216
1217 natt = x->encap;
1218 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1219 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1220
1221 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1222 struct sadb_x_nat_t_port* n_port =
1223 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1224 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1225 }
1226 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1227 struct sadb_x_nat_t_port* n_port =
1228 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1229 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1230 }
1231 }
1232
1233 err = xfrm_init_state(x);
1234 if (err)
1235 goto out;
1236
1237 x->km.seq = hdr->sadb_msg_seq;
1238 return x;
1239
1240 out:
1241 x->km.state = XFRM_STATE_DEAD;
1242 xfrm_state_put(x);
1243 return ERR_PTR(err);
1244 }
1245
1246 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1247 {
1248 return -EOPNOTSUPP;
1249 }
1250
1251 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1252 {
1253 struct sk_buff *resp_skb;
1254 struct sadb_x_sa2 *sa2;
1255 struct sadb_address *saddr, *daddr;
1256 struct sadb_msg *out_hdr;
1257 struct xfrm_state *x = NULL;
1258 int mode;
1259 u32 reqid;
1260 u8 proto;
1261 unsigned short family;
1262 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1263
1264 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1265 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1266 return -EINVAL;
1267
1268 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1269 if (proto == 0)
1270 return -EINVAL;
1271
1272 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1273 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1274 if (mode < 0)
1275 return -EINVAL;
1276 reqid = sa2->sadb_x_sa2_reqid;
1277 } else {
1278 mode = 0;
1279 reqid = 0;
1280 }
1281
1282 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1283 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1284
1285 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1286 switch (family) {
1287 case AF_INET:
1288 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1289 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1290 break;
1291 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1292 case AF_INET6:
1293 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1294 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1295 break;
1296 #endif
1297 }
1298
1299 if (hdr->sadb_msg_seq) {
1300 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1301 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1302 xfrm_state_put(x);
1303 x = NULL;
1304 }
1305 }
1306
1307 if (!x)
1308 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1309
1310 if (x == NULL)
1311 return -ENOENT;
1312
1313 resp_skb = ERR_PTR(-ENOENT);
1314
1315 spin_lock_bh(&x->lock);
1316 if (x->km.state != XFRM_STATE_DEAD) {
1317 struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1318 u32 min_spi, max_spi;
1319
1320 if (range != NULL) {
1321 min_spi = range->sadb_spirange_min;
1322 max_spi = range->sadb_spirange_max;
1323 } else {
1324 min_spi = 0x100;
1325 max_spi = 0x0fffffff;
1326 }
1327 xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
1328 if (x->id.spi)
1329 resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
1330 }
1331 spin_unlock_bh(&x->lock);
1332
1333 if (IS_ERR(resp_skb)) {
1334 xfrm_state_put(x);
1335 return PTR_ERR(resp_skb);
1336 }
1337
1338 out_hdr = (struct sadb_msg *) resp_skb->data;
1339 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1340 out_hdr->sadb_msg_type = SADB_GETSPI;
1341 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1342 out_hdr->sadb_msg_errno = 0;
1343 out_hdr->sadb_msg_reserved = 0;
1344 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1345 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1346
1347 xfrm_state_put(x);
1348
1349 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1350
1351 return 0;
1352 }
1353
1354 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1355 {
1356 struct xfrm_state *x;
1357
1358 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1359 return -EOPNOTSUPP;
1360
1361 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1362 return 0;
1363
1364 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1365 if (x == NULL)
1366 return 0;
1367
1368 spin_lock_bh(&x->lock);
1369 if (x->km.state == XFRM_STATE_ACQ) {
1370 x->km.state = XFRM_STATE_ERROR;
1371 wake_up(&km_waitq);
1372 }
1373 spin_unlock_bh(&x->lock);
1374 xfrm_state_put(x);
1375 return 0;
1376 }
1377
1378 static inline int event2poltype(int event)
1379 {
1380 switch (event) {
1381 case XFRM_MSG_DELPOLICY:
1382 return SADB_X_SPDDELETE;
1383 case XFRM_MSG_NEWPOLICY:
1384 return SADB_X_SPDADD;
1385 case XFRM_MSG_UPDPOLICY:
1386 return SADB_X_SPDUPDATE;
1387 case XFRM_MSG_POLEXPIRE:
1388 // return SADB_X_SPDEXPIRE;
1389 default:
1390 printk("pfkey: Unknown policy event %d\n", event);
1391 break;
1392 }
1393
1394 return 0;
1395 }
1396
1397 static inline int event2keytype(int event)
1398 {
1399 switch (event) {
1400 case XFRM_MSG_DELSA:
1401 return SADB_DELETE;
1402 case XFRM_MSG_NEWSA:
1403 return SADB_ADD;
1404 case XFRM_MSG_UPDSA:
1405 return SADB_UPDATE;
1406 case XFRM_MSG_EXPIRE:
1407 return SADB_EXPIRE;
1408 default:
1409 printk("pfkey: Unknown SA event %d\n", event);
1410 break;
1411 }
1412
1413 return 0;
1414 }
1415
1416 /* ADD/UPD/DEL */
1417 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1418 {
1419 struct sk_buff *skb;
1420 struct sadb_msg *hdr;
1421 int hsc = 3;
1422
1423 if (c->event == XFRM_MSG_DELSA)
1424 hsc = 0;
1425
1426 skb = pfkey_xfrm_state2msg(x, 0, hsc);
1427
1428 if (IS_ERR(skb))
1429 return PTR_ERR(skb);
1430
1431 hdr = (struct sadb_msg *) skb->data;
1432 hdr->sadb_msg_version = PF_KEY_V2;
1433 hdr->sadb_msg_type = event2keytype(c->event);
1434 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1435 hdr->sadb_msg_errno = 0;
1436 hdr->sadb_msg_reserved = 0;
1437 hdr->sadb_msg_seq = c->seq;
1438 hdr->sadb_msg_pid = c->pid;
1439
1440 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1441
1442 return 0;
1443 }
1444
1445 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1446 {
1447 struct xfrm_state *x;
1448 int err;
1449 struct km_event c;
1450
1451 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1452 if (IS_ERR(x))
1453 return PTR_ERR(x);
1454
1455 xfrm_state_hold(x);
1456 if (hdr->sadb_msg_type == SADB_ADD)
1457 err = xfrm_state_add(x);
1458 else
1459 err = xfrm_state_update(x);
1460
1461 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1462 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
1463
1464 if (err < 0) {
1465 x->km.state = XFRM_STATE_DEAD;
1466 __xfrm_state_put(x);
1467 goto out;
1468 }
1469
1470 if (hdr->sadb_msg_type == SADB_ADD)
1471 c.event = XFRM_MSG_NEWSA;
1472 else
1473 c.event = XFRM_MSG_UPDSA;
1474 c.seq = hdr->sadb_msg_seq;
1475 c.pid = hdr->sadb_msg_pid;
1476 km_state_notify(x, &c);
1477 out:
1478 xfrm_state_put(x);
1479 return err;
1480 }
1481
1482 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1483 {
1484 struct xfrm_state *x;
1485 struct km_event c;
1486 int err;
1487
1488 if (!ext_hdrs[SADB_EXT_SA-1] ||
1489 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1490 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1491 return -EINVAL;
1492
1493 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1494 if (x == NULL)
1495 return -ESRCH;
1496
1497 if ((err = security_xfrm_state_delete(x)))
1498 goto out;
1499
1500 if (xfrm_state_kern(x)) {
1501 err = -EPERM;
1502 goto out;
1503 }
1504
1505 err = xfrm_state_delete(x);
1506
1507 if (err < 0)
1508 goto out;
1509
1510 c.seq = hdr->sadb_msg_seq;
1511 c.pid = hdr->sadb_msg_pid;
1512 c.event = XFRM_MSG_DELSA;
1513 km_state_notify(x, &c);
1514 out:
1515 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
1516 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
1517 xfrm_state_put(x);
1518
1519 return err;
1520 }
1521
1522 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1523 {
1524 __u8 proto;
1525 struct sk_buff *out_skb;
1526 struct sadb_msg *out_hdr;
1527 struct xfrm_state *x;
1528
1529 if (!ext_hdrs[SADB_EXT_SA-1] ||
1530 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1531 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1532 return -EINVAL;
1533
1534 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1535 if (x == NULL)
1536 return -ESRCH;
1537
1538 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1539 proto = x->id.proto;
1540 xfrm_state_put(x);
1541 if (IS_ERR(out_skb))
1542 return PTR_ERR(out_skb);
1543
1544 out_hdr = (struct sadb_msg *) out_skb->data;
1545 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1546 out_hdr->sadb_msg_type = SADB_DUMP;
1547 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1548 out_hdr->sadb_msg_errno = 0;
1549 out_hdr->sadb_msg_reserved = 0;
1550 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1551 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1552 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1553
1554 return 0;
1555 }
1556
1557 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1558 gfp_t allocation)
1559 {
1560 struct sk_buff *skb;
1561 struct sadb_msg *hdr;
1562 int len, auth_len, enc_len, i;
1563
1564 auth_len = xfrm_count_auth_supported();
1565 if (auth_len) {
1566 auth_len *= sizeof(struct sadb_alg);
1567 auth_len += sizeof(struct sadb_supported);
1568 }
1569
1570 enc_len = xfrm_count_enc_supported();
1571 if (enc_len) {
1572 enc_len *= sizeof(struct sadb_alg);
1573 enc_len += sizeof(struct sadb_supported);
1574 }
1575
1576 len = enc_len + auth_len + sizeof(struct sadb_msg);
1577
1578 skb = alloc_skb(len + 16, allocation);
1579 if (!skb)
1580 goto out_put_algs;
1581
1582 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1583 pfkey_hdr_dup(hdr, orig);
1584 hdr->sadb_msg_errno = 0;
1585 hdr->sadb_msg_len = len / sizeof(uint64_t);
1586
1587 if (auth_len) {
1588 struct sadb_supported *sp;
1589 struct sadb_alg *ap;
1590
1591 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1592 ap = (struct sadb_alg *) (sp + 1);
1593
1594 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1595 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1596
1597 for (i = 0; ; i++) {
1598 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1599 if (!aalg)
1600 break;
1601 if (aalg->available)
1602 *ap++ = aalg->desc;
1603 }
1604 }
1605
1606 if (enc_len) {
1607 struct sadb_supported *sp;
1608 struct sadb_alg *ap;
1609
1610 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1611 ap = (struct sadb_alg *) (sp + 1);
1612
1613 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1614 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1615
1616 for (i = 0; ; i++) {
1617 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1618 if (!ealg)
1619 break;
1620 if (ealg->available)
1621 *ap++ = ealg->desc;
1622 }
1623 }
1624
1625 out_put_algs:
1626 return skb;
1627 }
1628
1629 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1630 {
1631 struct pfkey_sock *pfk = pfkey_sk(sk);
1632 struct sk_buff *supp_skb;
1633
1634 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1635 return -EINVAL;
1636
1637 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1638 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1639 return -EEXIST;
1640 pfk->registered |= (1<<hdr->sadb_msg_satype);
1641 }
1642
1643 xfrm_probe_algs();
1644
1645 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1646 if (!supp_skb) {
1647 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1648 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1649
1650 return -ENOBUFS;
1651 }
1652
1653 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1654
1655 return 0;
1656 }
1657
1658 static int key_notify_sa_flush(struct km_event *c)
1659 {
1660 struct sk_buff *skb;
1661 struct sadb_msg *hdr;
1662
1663 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1664 if (!skb)
1665 return -ENOBUFS;
1666 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1667 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1668 hdr->sadb_msg_type = SADB_FLUSH;
1669 hdr->sadb_msg_seq = c->seq;
1670 hdr->sadb_msg_pid = c->pid;
1671 hdr->sadb_msg_version = PF_KEY_V2;
1672 hdr->sadb_msg_errno = (uint8_t) 0;
1673 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1674
1675 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1676
1677 return 0;
1678 }
1679
1680 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1681 {
1682 unsigned proto;
1683 struct km_event c;
1684 struct xfrm_audit audit_info;
1685 int err;
1686
1687 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1688 if (proto == 0)
1689 return -EINVAL;
1690
1691 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1692 audit_info.secid = 0;
1693 err = xfrm_state_flush(proto, &audit_info);
1694 if (err)
1695 return err;
1696 c.data.proto = proto;
1697 c.seq = hdr->sadb_msg_seq;
1698 c.pid = hdr->sadb_msg_pid;
1699 c.event = XFRM_MSG_FLUSHSA;
1700 km_state_notify(NULL, &c);
1701
1702 return 0;
1703 }
1704
1705 struct pfkey_dump_data
1706 {
1707 struct sk_buff *skb;
1708 struct sadb_msg *hdr;
1709 struct sock *sk;
1710 };
1711
1712 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1713 {
1714 struct pfkey_dump_data *data = ptr;
1715 struct sk_buff *out_skb;
1716 struct sadb_msg *out_hdr;
1717
1718 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1719 if (IS_ERR(out_skb))
1720 return PTR_ERR(out_skb);
1721
1722 out_hdr = (struct sadb_msg *) out_skb->data;
1723 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1724 out_hdr->sadb_msg_type = SADB_DUMP;
1725 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1726 out_hdr->sadb_msg_errno = 0;
1727 out_hdr->sadb_msg_reserved = 0;
1728 out_hdr->sadb_msg_seq = count;
1729 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1730 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1731 return 0;
1732 }
1733
1734 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1735 {
1736 u8 proto;
1737 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1738
1739 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1740 if (proto == 0)
1741 return -EINVAL;
1742
1743 return xfrm_state_walk(proto, dump_sa, &data);
1744 }
1745
1746 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1747 {
1748 struct pfkey_sock *pfk = pfkey_sk(sk);
1749 int satype = hdr->sadb_msg_satype;
1750
1751 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1752 /* XXX we mangle packet... */
1753 hdr->sadb_msg_errno = 0;
1754 if (satype != 0 && satype != 1)
1755 return -EINVAL;
1756 pfk->promisc = satype;
1757 }
1758 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1759 return 0;
1760 }
1761
1762 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1763 {
1764 int i;
1765 u32 reqid = *(u32*)ptr;
1766
1767 for (i=0; i<xp->xfrm_nr; i++) {
1768 if (xp->xfrm_vec[i].reqid == reqid)
1769 return -EEXIST;
1770 }
1771 return 0;
1772 }
1773
1774 static u32 gen_reqid(void)
1775 {
1776 u32 start;
1777 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1778
1779 start = reqid;
1780 do {
1781 ++reqid;
1782 if (reqid == 0)
1783 reqid = IPSEC_MANUAL_REQID_MAX+1;
1784 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1785 (void*)&reqid) != -EEXIST)
1786 return reqid;
1787 } while (reqid != start);
1788 return 0;
1789 }
1790
1791 static int
1792 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1793 {
1794 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1795 struct sockaddr_in *sin;
1796 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1797 struct sockaddr_in6 *sin6;
1798 #endif
1799 int mode;
1800
1801 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1802 return -ELOOP;
1803
1804 if (rq->sadb_x_ipsecrequest_mode == 0)
1805 return -EINVAL;
1806
1807 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1808 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1809 return -EINVAL;
1810 t->mode = mode;
1811 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1812 t->optional = 1;
1813 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1814 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1815 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1816 t->reqid = 0;
1817 if (!t->reqid && !(t->reqid = gen_reqid()))
1818 return -ENOBUFS;
1819 }
1820
1821 /* addresses present only in tunnel mode */
1822 if (t->mode == XFRM_MODE_TUNNEL) {
1823 struct sockaddr *sa;
1824 sa = (struct sockaddr *)(rq+1);
1825 switch(sa->sa_family) {
1826 case AF_INET:
1827 sin = (struct sockaddr_in*)sa;
1828 t->saddr.a4 = sin->sin_addr.s_addr;
1829 sin++;
1830 if (sin->sin_family != AF_INET)
1831 return -EINVAL;
1832 t->id.daddr.a4 = sin->sin_addr.s_addr;
1833 break;
1834 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1835 case AF_INET6:
1836 sin6 = (struct sockaddr_in6*)sa;
1837 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1838 sin6++;
1839 if (sin6->sin6_family != AF_INET6)
1840 return -EINVAL;
1841 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1842 break;
1843 #endif
1844 default:
1845 return -EINVAL;
1846 }
1847 t->encap_family = sa->sa_family;
1848 } else
1849 t->encap_family = xp->family;
1850
1851 /* No way to set this via kame pfkey */
1852 t->aalgos = t->ealgos = t->calgos = ~0;
1853 xp->xfrm_nr++;
1854 return 0;
1855 }
1856
1857 static int
1858 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1859 {
1860 int err;
1861 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1862 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1863
1864 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1865 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1866 return err;
1867 len -= rq->sadb_x_ipsecrequest_len;
1868 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1869 }
1870 return 0;
1871 }
1872
1873 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1874 {
1875 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1876
1877 if (xfrm_ctx) {
1878 int len = sizeof(struct sadb_x_sec_ctx);
1879 len += xfrm_ctx->ctx_len;
1880 return PFKEY_ALIGN8(len);
1881 }
1882 return 0;
1883 }
1884
1885 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1886 {
1887 struct xfrm_tmpl *t;
1888 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1889 int socklen = 0;
1890 int i;
1891
1892 for (i=0; i<xp->xfrm_nr; i++) {
1893 t = xp->xfrm_vec + i;
1894 socklen += (t->encap_family == AF_INET ?
1895 sizeof(struct sockaddr_in) :
1896 sizeof(struct sockaddr_in6));
1897 }
1898
1899 return sizeof(struct sadb_msg) +
1900 (sizeof(struct sadb_lifetime) * 3) +
1901 (sizeof(struct sadb_address) * 2) +
1902 (sockaddr_size * 2) +
1903 sizeof(struct sadb_x_policy) +
1904 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1905 (socklen * 2) +
1906 pfkey_xfrm_policy2sec_ctx_size(xp);
1907 }
1908
1909 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1910 {
1911 struct sk_buff *skb;
1912 int size;
1913
1914 size = pfkey_xfrm_policy2msg_size(xp);
1915
1916 skb = alloc_skb(size + 16, GFP_ATOMIC);
1917 if (skb == NULL)
1918 return ERR_PTR(-ENOBUFS);
1919
1920 return skb;
1921 }
1922
1923 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1924 {
1925 struct sadb_msg *hdr;
1926 struct sadb_address *addr;
1927 struct sadb_lifetime *lifetime;
1928 struct sadb_x_policy *pol;
1929 struct sockaddr_in *sin;
1930 struct sadb_x_sec_ctx *sec_ctx;
1931 struct xfrm_sec_ctx *xfrm_ctx;
1932 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1933 struct sockaddr_in6 *sin6;
1934 #endif
1935 int i;
1936 int size;
1937 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1938 int socklen = (xp->family == AF_INET ?
1939 sizeof(struct sockaddr_in) :
1940 sizeof(struct sockaddr_in6));
1941
1942 size = pfkey_xfrm_policy2msg_size(xp);
1943
1944 /* call should fill header later */
1945 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1946 memset(hdr, 0, size); /* XXX do we need this ? */
1947
1948 /* src address */
1949 addr = (struct sadb_address*) skb_put(skb,
1950 sizeof(struct sadb_address)+sockaddr_size);
1951 addr->sadb_address_len =
1952 (sizeof(struct sadb_address)+sockaddr_size)/
1953 sizeof(uint64_t);
1954 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1955 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1956 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1957 addr->sadb_address_reserved = 0;
1958 /* src address */
1959 if (xp->family == AF_INET) {
1960 sin = (struct sockaddr_in *) (addr + 1);
1961 sin->sin_family = AF_INET;
1962 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1963 sin->sin_port = xp->selector.sport;
1964 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1965 }
1966 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1967 else if (xp->family == AF_INET6) {
1968 sin6 = (struct sockaddr_in6 *) (addr + 1);
1969 sin6->sin6_family = AF_INET6;
1970 sin6->sin6_port = xp->selector.sport;
1971 sin6->sin6_flowinfo = 0;
1972 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1973 sizeof(struct in6_addr));
1974 sin6->sin6_scope_id = 0;
1975 }
1976 #endif
1977 else
1978 BUG();
1979
1980 /* dst address */
1981 addr = (struct sadb_address*) skb_put(skb,
1982 sizeof(struct sadb_address)+sockaddr_size);
1983 addr->sadb_address_len =
1984 (sizeof(struct sadb_address)+sockaddr_size)/
1985 sizeof(uint64_t);
1986 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1987 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1988 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1989 addr->sadb_address_reserved = 0;
1990 if (xp->family == AF_INET) {
1991 sin = (struct sockaddr_in *) (addr + 1);
1992 sin->sin_family = AF_INET;
1993 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1994 sin->sin_port = xp->selector.dport;
1995 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1996 }
1997 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1998 else if (xp->family == AF_INET6) {
1999 sin6 = (struct sockaddr_in6 *) (addr + 1);
2000 sin6->sin6_family = AF_INET6;
2001 sin6->sin6_port = xp->selector.dport;
2002 sin6->sin6_flowinfo = 0;
2003 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2004 sizeof(struct in6_addr));
2005 sin6->sin6_scope_id = 0;
2006 }
2007 #endif
2008 else
2009 BUG();
2010
2011 /* hard time */
2012 lifetime = (struct sadb_lifetime *) skb_put(skb,
2013 sizeof(struct sadb_lifetime));
2014 lifetime->sadb_lifetime_len =
2015 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2016 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2017 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2018 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2019 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2020 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2021 /* soft time */
2022 lifetime = (struct sadb_lifetime *) skb_put(skb,
2023 sizeof(struct sadb_lifetime));
2024 lifetime->sadb_lifetime_len =
2025 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2026 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2027 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2028 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2029 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2030 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2031 /* current time */
2032 lifetime = (struct sadb_lifetime *) skb_put(skb,
2033 sizeof(struct sadb_lifetime));
2034 lifetime->sadb_lifetime_len =
2035 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2036 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2037 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2038 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2039 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2040 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2041
2042 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2043 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2044 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2045 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2046 if (xp->action == XFRM_POLICY_ALLOW) {
2047 if (xp->xfrm_nr)
2048 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2049 else
2050 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2051 }
2052 pol->sadb_x_policy_dir = dir+1;
2053 pol->sadb_x_policy_id = xp->index;
2054 pol->sadb_x_policy_priority = xp->priority;
2055
2056 for (i=0; i<xp->xfrm_nr; i++) {
2057 struct sadb_x_ipsecrequest *rq;
2058 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2059 int req_size;
2060 int mode;
2061
2062 req_size = sizeof(struct sadb_x_ipsecrequest);
2063 if (t->mode == XFRM_MODE_TUNNEL)
2064 req_size += ((t->encap_family == AF_INET ?
2065 sizeof(struct sockaddr_in) :
2066 sizeof(struct sockaddr_in6)) * 2);
2067 else
2068 size -= 2*socklen;
2069 rq = (void*)skb_put(skb, req_size);
2070 pol->sadb_x_policy_len += req_size/8;
2071 memset(rq, 0, sizeof(*rq));
2072 rq->sadb_x_ipsecrequest_len = req_size;
2073 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2074 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2075 return -EINVAL;
2076 rq->sadb_x_ipsecrequest_mode = mode;
2077 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2078 if (t->reqid)
2079 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2080 if (t->optional)
2081 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2082 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2083 if (t->mode == XFRM_MODE_TUNNEL) {
2084 switch (t->encap_family) {
2085 case AF_INET:
2086 sin = (void*)(rq+1);
2087 sin->sin_family = AF_INET;
2088 sin->sin_addr.s_addr = t->saddr.a4;
2089 sin->sin_port = 0;
2090 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2091 sin++;
2092 sin->sin_family = AF_INET;
2093 sin->sin_addr.s_addr = t->id.daddr.a4;
2094 sin->sin_port = 0;
2095 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2096 break;
2097 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2098 case AF_INET6:
2099 sin6 = (void*)(rq+1);
2100 sin6->sin6_family = AF_INET6;
2101 sin6->sin6_port = 0;
2102 sin6->sin6_flowinfo = 0;
2103 memcpy(&sin6->sin6_addr, t->saddr.a6,
2104 sizeof(struct in6_addr));
2105 sin6->sin6_scope_id = 0;
2106
2107 sin6++;
2108 sin6->sin6_family = AF_INET6;
2109 sin6->sin6_port = 0;
2110 sin6->sin6_flowinfo = 0;
2111 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2112 sizeof(struct in6_addr));
2113 sin6->sin6_scope_id = 0;
2114 break;
2115 #endif
2116 default:
2117 break;
2118 }
2119 }
2120 }
2121
2122 /* security context */
2123 if ((xfrm_ctx = xp->security)) {
2124 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2125
2126 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2127 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2128 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2129 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2130 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2131 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2132 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2133 xfrm_ctx->ctx_len);
2134 }
2135
2136 hdr->sadb_msg_len = size / sizeof(uint64_t);
2137 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2138
2139 return 0;
2140 }
2141
2142 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2143 {
2144 struct sk_buff *out_skb;
2145 struct sadb_msg *out_hdr;
2146 int err;
2147
2148 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2149 if (IS_ERR(out_skb)) {
2150 err = PTR_ERR(out_skb);
2151 goto out;
2152 }
2153 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2154 if (err < 0)
2155 return err;
2156
2157 out_hdr = (struct sadb_msg *) out_skb->data;
2158 out_hdr->sadb_msg_version = PF_KEY_V2;
2159
2160 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2161 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2162 else
2163 out_hdr->sadb_msg_type = event2poltype(c->event);
2164 out_hdr->sadb_msg_errno = 0;
2165 out_hdr->sadb_msg_seq = c->seq;
2166 out_hdr->sadb_msg_pid = c->pid;
2167 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2168 out:
2169 return 0;
2170
2171 }
2172
2173 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2174 {
2175 int err = 0;
2176 struct sadb_lifetime *lifetime;
2177 struct sadb_address *sa;
2178 struct sadb_x_policy *pol;
2179 struct xfrm_policy *xp;
2180 struct km_event c;
2181 struct sadb_x_sec_ctx *sec_ctx;
2182
2183 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2184 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2185 !ext_hdrs[SADB_X_EXT_POLICY-1])
2186 return -EINVAL;
2187
2188 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2189 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2190 return -EINVAL;
2191 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2192 return -EINVAL;
2193
2194 xp = xfrm_policy_alloc(GFP_KERNEL);
2195 if (xp == NULL)
2196 return -ENOBUFS;
2197
2198 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2199 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2200 xp->priority = pol->sadb_x_policy_priority;
2201
2202 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2203 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2204 if (!xp->family) {
2205 err = -EINVAL;
2206 goto out;
2207 }
2208 xp->selector.family = xp->family;
2209 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2210 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2211 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2212 if (xp->selector.sport)
2213 xp->selector.sport_mask = htons(0xffff);
2214
2215 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2216 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2217 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2218
2219 /* Amusing, we set this twice. KAME apps appear to set same value
2220 * in both addresses.
2221 */
2222 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2223
2224 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2225 if (xp->selector.dport)
2226 xp->selector.dport_mask = htons(0xffff);
2227
2228 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2229 if (sec_ctx != NULL) {
2230 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2231
2232 if (!uctx) {
2233 err = -ENOBUFS;
2234 goto out;
2235 }
2236
2237 err = security_xfrm_policy_alloc(xp, uctx);
2238 kfree(uctx);
2239
2240 if (err)
2241 goto out;
2242 }
2243
2244 xp->lft.soft_byte_limit = XFRM_INF;
2245 xp->lft.hard_byte_limit = XFRM_INF;
2246 xp->lft.soft_packet_limit = XFRM_INF;
2247 xp->lft.hard_packet_limit = XFRM_INF;
2248 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2249 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2250 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2251 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2252 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2253 }
2254 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2255 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2256 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2257 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2258 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2259 }
2260 xp->xfrm_nr = 0;
2261 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2262 (err = parse_ipsecrequests(xp, pol)) < 0)
2263 goto out;
2264
2265 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2266 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2267
2268 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2269 AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2270
2271 if (err)
2272 goto out;
2273
2274 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2275 c.event = XFRM_MSG_UPDPOLICY;
2276 else
2277 c.event = XFRM_MSG_NEWPOLICY;
2278
2279 c.seq = hdr->sadb_msg_seq;
2280 c.pid = hdr->sadb_msg_pid;
2281
2282 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2283 xfrm_pol_put(xp);
2284 return 0;
2285
2286 out:
2287 security_xfrm_policy_free(xp);
2288 kfree(xp);
2289 return err;
2290 }
2291
2292 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2293 {
2294 int err;
2295 struct sadb_address *sa;
2296 struct sadb_x_policy *pol;
2297 struct xfrm_policy *xp, tmp;
2298 struct xfrm_selector sel;
2299 struct km_event c;
2300 struct sadb_x_sec_ctx *sec_ctx;
2301
2302 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2303 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2304 !ext_hdrs[SADB_X_EXT_POLICY-1])
2305 return -EINVAL;
2306
2307 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2308 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2309 return -EINVAL;
2310
2311 memset(&sel, 0, sizeof(sel));
2312
2313 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2314 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2315 sel.prefixlen_s = sa->sadb_address_prefixlen;
2316 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2317 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2318 if (sel.sport)
2319 sel.sport_mask = htons(0xffff);
2320
2321 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2322 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2323 sel.prefixlen_d = sa->sadb_address_prefixlen;
2324 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2325 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2326 if (sel.dport)
2327 sel.dport_mask = htons(0xffff);
2328
2329 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2330 memset(&tmp, 0, sizeof(struct xfrm_policy));
2331
2332 if (sec_ctx != NULL) {
2333 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2334
2335 if (!uctx)
2336 return -ENOMEM;
2337
2338 err = security_xfrm_policy_alloc(&tmp, uctx);
2339 kfree(uctx);
2340
2341 if (err)
2342 return err;
2343 }
2344
2345 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2346 &sel, tmp.security, 1, &err);
2347 security_xfrm_policy_free(&tmp);
2348
2349 if (xp == NULL)
2350 return -ENOENT;
2351
2352 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2353 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2354
2355 if (err)
2356 goto out;
2357
2358 c.seq = hdr->sadb_msg_seq;
2359 c.pid = hdr->sadb_msg_pid;
2360 c.event = XFRM_MSG_DELPOLICY;
2361 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2362
2363 out:
2364 xfrm_pol_put(xp);
2365 return err;
2366 }
2367
2368 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2369 {
2370 int err;
2371 struct sk_buff *out_skb;
2372 struct sadb_msg *out_hdr;
2373 err = 0;
2374
2375 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2376 if (IS_ERR(out_skb)) {
2377 err = PTR_ERR(out_skb);
2378 goto out;
2379 }
2380 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2381 if (err < 0)
2382 goto out;
2383
2384 out_hdr = (struct sadb_msg *) out_skb->data;
2385 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2386 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2387 out_hdr->sadb_msg_satype = 0;
2388 out_hdr->sadb_msg_errno = 0;
2389 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2390 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2391 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2392 err = 0;
2393
2394 out:
2395 return err;
2396 }
2397
2398 #ifdef CONFIG_NET_KEY_MIGRATE
2399 static int pfkey_sockaddr_pair_size(sa_family_t family)
2400 {
2401 switch (family) {
2402 case AF_INET:
2403 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2404 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2405 case AF_INET6:
2406 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2407 #endif
2408 default:
2409 return 0;
2410 }
2411 /* NOTREACHED */
2412 }
2413
2414 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2415 xfrm_address_t *saddr, xfrm_address_t *daddr,
2416 u16 *family)
2417 {
2418 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2419 if (rq->sadb_x_ipsecrequest_len <
2420 pfkey_sockaddr_pair_size(sa->sa_family))
2421 return -EINVAL;
2422
2423 switch (sa->sa_family) {
2424 case AF_INET:
2425 {
2426 struct sockaddr_in *sin;
2427 sin = (struct sockaddr_in *)sa;
2428 if ((sin+1)->sin_family != AF_INET)
2429 return -EINVAL;
2430 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2431 sin++;
2432 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2433 *family = AF_INET;
2434 break;
2435 }
2436 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2437 case AF_INET6:
2438 {
2439 struct sockaddr_in6 *sin6;
2440 sin6 = (struct sockaddr_in6 *)sa;
2441 if ((sin6+1)->sin6_family != AF_INET6)
2442 return -EINVAL;
2443 memcpy(&saddr->a6, &sin6->sin6_addr,
2444 sizeof(saddr->a6));
2445 sin6++;
2446 memcpy(&daddr->a6, &sin6->sin6_addr,
2447 sizeof(daddr->a6));
2448 *family = AF_INET6;
2449 break;
2450 }
2451 #endif
2452 default:
2453 return -EINVAL;
2454 }
2455
2456 return 0;
2457 }
2458
2459 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2460 struct xfrm_migrate *m)
2461 {
2462 int err;
2463 struct sadb_x_ipsecrequest *rq2;
2464 int mode;
2465
2466 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2467 len < rq1->sadb_x_ipsecrequest_len)
2468 return -EINVAL;
2469
2470 /* old endoints */
2471 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2472 &m->old_family);
2473 if (err)
2474 return err;
2475
2476 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2477 len -= rq1->sadb_x_ipsecrequest_len;
2478
2479 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2480 len < rq2->sadb_x_ipsecrequest_len)
2481 return -EINVAL;
2482
2483 /* new endpoints */
2484 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2485 &m->new_family);
2486 if (err)
2487 return err;
2488
2489 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2490 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2491 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2492 return -EINVAL;
2493
2494 m->proto = rq1->sadb_x_ipsecrequest_proto;
2495 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2496 return -EINVAL;
2497 m->mode = mode;
2498 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2499
2500 return ((int)(rq1->sadb_x_ipsecrequest_len +
2501 rq2->sadb_x_ipsecrequest_len));
2502 }
2503
2504 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2505 struct sadb_msg *hdr, void **ext_hdrs)
2506 {
2507 int i, len, ret, err = -EINVAL;
2508 u8 dir;
2509 struct sadb_address *sa;
2510 struct sadb_x_policy *pol;
2511 struct sadb_x_ipsecrequest *rq;
2512 struct xfrm_selector sel;
2513 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2514
2515 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2516 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2517 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2518 err = -EINVAL;
2519 goto out;
2520 }
2521
2522 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2523 if (!pol) {
2524 err = -EINVAL;
2525 goto out;
2526 }
2527
2528 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2529 err = -EINVAL;
2530 goto out;
2531 }
2532
2533 dir = pol->sadb_x_policy_dir - 1;
2534 memset(&sel, 0, sizeof(sel));
2535
2536 /* set source address info of selector */
2537 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2538 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2539 sel.prefixlen_s = sa->sadb_address_prefixlen;
2540 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2541 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2542 if (sel.sport)
2543 sel.sport_mask = htons(0xffff);
2544
2545 /* set destination address info of selector */
2546 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2547 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2548 sel.prefixlen_d = sa->sadb_address_prefixlen;
2549 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2550 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2551 if (sel.dport)
2552 sel.dport_mask = htons(0xffff);
2553
2554 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2555
2556 /* extract ipsecrequests */
2557 i = 0;
2558 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2559
2560 while (len > 0 && i < XFRM_MAX_DEPTH) {
2561 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2562 if (ret < 0) {
2563 err = ret;
2564 goto out;
2565 } else {
2566 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2567 len -= ret;
2568 i++;
2569 }
2570 }
2571
2572 if (!i || len > 0) {
2573 err = -EINVAL;
2574 goto out;
2575 }
2576
2577 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2578
2579 out:
2580 return err;
2581 }
2582 #else
2583 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2584 struct sadb_msg *hdr, void **ext_hdrs)
2585 {
2586 return -ENOPROTOOPT;
2587 }
2588 #endif
2589
2590
2591 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2592 {
2593 unsigned int dir;
2594 int err = 0, delete;
2595 struct sadb_x_policy *pol;
2596 struct xfrm_policy *xp;
2597 struct km_event c;
2598
2599 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2600 return -EINVAL;
2601
2602 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2603 if (dir >= XFRM_POLICY_MAX)
2604 return -EINVAL;
2605
2606 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2607 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2608 delete, &err);
2609 if (xp == NULL)
2610 return -ENOENT;
2611
2612 if (delete) {
2613 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2614 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2615
2616 if (err)
2617 goto out;
2618 c.seq = hdr->sadb_msg_seq;
2619 c.pid = hdr->sadb_msg_pid;
2620 c.data.byid = 1;
2621 c.event = XFRM_MSG_DELPOLICY;
2622 km_policy_notify(xp, dir, &c);
2623 } else {
2624 err = key_pol_get_resp(sk, xp, hdr, dir);
2625 }
2626
2627 out:
2628 xfrm_pol_put(xp);
2629 return err;
2630 }
2631
2632 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2633 {
2634 struct pfkey_dump_data *data = ptr;
2635 struct sk_buff *out_skb;
2636 struct sadb_msg *out_hdr;
2637 int err;
2638
2639 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2640 if (IS_ERR(out_skb))
2641 return PTR_ERR(out_skb);
2642
2643 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2644 if (err < 0)
2645 return err;
2646
2647 out_hdr = (struct sadb_msg *) out_skb->data;
2648 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2649 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2650 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2651 out_hdr->sadb_msg_errno = 0;
2652 out_hdr->sadb_msg_seq = count;
2653 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2654 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2655 return 0;
2656 }
2657
2658 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2659 {
2660 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2661
2662 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2663 }
2664
2665 static int key_notify_policy_flush(struct km_event *c)
2666 {
2667 struct sk_buff *skb_out;
2668 struct sadb_msg *hdr;
2669
2670 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2671 if (!skb_out)
2672 return -ENOBUFS;
2673 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2674 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2675 hdr->sadb_msg_seq = c->seq;
2676 hdr->sadb_msg_pid = c->pid;
2677 hdr->sadb_msg_version = PF_KEY_V2;
2678 hdr->sadb_msg_errno = (uint8_t) 0;
2679 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2680 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2681 return 0;
2682
2683 }
2684
2685 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2686 {
2687 struct km_event c;
2688 struct xfrm_audit audit_info;
2689 int err;
2690
2691 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2692 audit_info.secid = 0;
2693 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2694 if (err)
2695 return err;
2696 c.data.type = XFRM_POLICY_TYPE_MAIN;
2697 c.event = XFRM_MSG_FLUSHPOLICY;
2698 c.pid = hdr->sadb_msg_pid;
2699 c.seq = hdr->sadb_msg_seq;
2700 km_policy_notify(NULL, 0, &c);
2701
2702 return 0;
2703 }
2704
2705 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2706 struct sadb_msg *hdr, void **ext_hdrs);
2707 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2708 [SADB_RESERVED] = pfkey_reserved,
2709 [SADB_GETSPI] = pfkey_getspi,
2710 [SADB_UPDATE] = pfkey_add,
2711 [SADB_ADD] = pfkey_add,
2712 [SADB_DELETE] = pfkey_delete,
2713 [SADB_GET] = pfkey_get,
2714 [SADB_ACQUIRE] = pfkey_acquire,
2715 [SADB_REGISTER] = pfkey_register,
2716 [SADB_EXPIRE] = NULL,
2717 [SADB_FLUSH] = pfkey_flush,
2718 [SADB_DUMP] = pfkey_dump,
2719 [SADB_X_PROMISC] = pfkey_promisc,
2720 [SADB_X_PCHANGE] = NULL,
2721 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2722 [SADB_X_SPDADD] = pfkey_spdadd,
2723 [SADB_X_SPDDELETE] = pfkey_spddelete,
2724 [SADB_X_SPDGET] = pfkey_spdget,
2725 [SADB_X_SPDACQUIRE] = NULL,
2726 [SADB_X_SPDDUMP] = pfkey_spddump,
2727 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2728 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2729 [SADB_X_SPDDELETE2] = pfkey_spdget,
2730 [SADB_X_MIGRATE] = pfkey_migrate,
2731 };
2732
2733 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2734 {
2735 void *ext_hdrs[SADB_EXT_MAX];
2736 int err;
2737
2738 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2739 BROADCAST_PROMISC_ONLY, NULL);
2740
2741 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2742 err = parse_exthdrs(skb, hdr, ext_hdrs);
2743 if (!err) {
2744 err = -EOPNOTSUPP;
2745 if (pfkey_funcs[hdr->sadb_msg_type])
2746 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2747 }
2748 return err;
2749 }
2750
2751 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2752 {
2753 struct sadb_msg *hdr = NULL;
2754
2755 if (skb->len < sizeof(*hdr)) {
2756 *errp = -EMSGSIZE;
2757 } else {
2758 hdr = (struct sadb_msg *) skb->data;
2759 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2760 hdr->sadb_msg_reserved != 0 ||
2761 (hdr->sadb_msg_type <= SADB_RESERVED ||
2762 hdr->sadb_msg_type > SADB_MAX)) {
2763 hdr = NULL;
2764 *errp = -EINVAL;
2765 } else if (hdr->sadb_msg_len != (skb->len /
2766 sizeof(uint64_t)) ||
2767 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2768 sizeof(uint64_t))) {
2769 hdr = NULL;
2770 *errp = -EMSGSIZE;
2771 } else {
2772 *errp = 0;
2773 }
2774 }
2775 return hdr;
2776 }
2777
2778 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2779 {
2780 return t->aalgos & (1 << d->desc.sadb_alg_id);
2781 }
2782
2783 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2784 {
2785 return t->ealgos & (1 << d->desc.sadb_alg_id);
2786 }
2787
2788 static int count_ah_combs(struct xfrm_tmpl *t)
2789 {
2790 int i, sz = 0;
2791
2792 for (i = 0; ; i++) {
2793 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2794 if (!aalg)
2795 break;
2796 if (aalg_tmpl_set(t, aalg) && aalg->available)
2797 sz += sizeof(struct sadb_comb);
2798 }
2799 return sz + sizeof(struct sadb_prop);
2800 }
2801
2802 static int count_esp_combs(struct xfrm_tmpl *t)
2803 {
2804 int i, k, sz = 0;
2805
2806 for (i = 0; ; i++) {
2807 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2808 if (!ealg)
2809 break;
2810
2811 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2812 continue;
2813
2814 for (k = 1; ; k++) {
2815 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2816 if (!aalg)
2817 break;
2818
2819 if (aalg_tmpl_set(t, aalg) && aalg->available)
2820 sz += sizeof(struct sadb_comb);
2821 }
2822 }
2823 return sz + sizeof(struct sadb_prop);
2824 }
2825
2826 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2827 {
2828 struct sadb_prop *p;
2829 int i;
2830
2831 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2832 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2833 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2834 p->sadb_prop_replay = 32;
2835 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2836
2837 for (i = 0; ; i++) {
2838 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2839 if (!aalg)
2840 break;
2841
2842 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2843 struct sadb_comb *c;
2844 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2845 memset(c, 0, sizeof(*c));
2846 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2847 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2848 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2849 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2850 c->sadb_comb_hard_addtime = 24*60*60;
2851 c->sadb_comb_soft_addtime = 20*60*60;
2852 c->sadb_comb_hard_usetime = 8*60*60;
2853 c->sadb_comb_soft_usetime = 7*60*60;
2854 }
2855 }
2856 }
2857
2858 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2859 {
2860 struct sadb_prop *p;
2861 int i, k;
2862
2863 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2864 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2865 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2866 p->sadb_prop_replay = 32;
2867 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2868
2869 for (i=0; ; i++) {
2870 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2871 if (!ealg)
2872 break;
2873
2874 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2875 continue;
2876
2877 for (k = 1; ; k++) {
2878 struct sadb_comb *c;
2879 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2880 if (!aalg)
2881 break;
2882 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2883 continue;
2884 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2885 memset(c, 0, sizeof(*c));
2886 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2887 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2888 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2889 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2890 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2891 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2892 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2893 c->sadb_comb_hard_addtime = 24*60*60;
2894 c->sadb_comb_soft_addtime = 20*60*60;
2895 c->sadb_comb_hard_usetime = 8*60*60;
2896 c->sadb_comb_soft_usetime = 7*60*60;
2897 }
2898 }
2899 }
2900
2901 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2902 {
2903 return 0;
2904 }
2905
2906 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2907 {
2908 struct sk_buff *out_skb;
2909 struct sadb_msg *out_hdr;
2910 int hard;
2911 int hsc;
2912
2913 hard = c->data.hard;
2914 if (hard)
2915 hsc = 2;
2916 else
2917 hsc = 1;
2918
2919 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2920 if (IS_ERR(out_skb))
2921 return PTR_ERR(out_skb);
2922
2923 out_hdr = (struct sadb_msg *) out_skb->data;
2924 out_hdr->sadb_msg_version = PF_KEY_V2;
2925 out_hdr->sadb_msg_type = SADB_EXPIRE;
2926 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2927 out_hdr->sadb_msg_errno = 0;
2928 out_hdr->sadb_msg_reserved = 0;
2929 out_hdr->sadb_msg_seq = 0;
2930 out_hdr->sadb_msg_pid = 0;
2931
2932 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2933 return 0;
2934 }
2935
2936 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2937 {
2938 switch (c->event) {
2939 case XFRM_MSG_EXPIRE:
2940 return key_notify_sa_expire(x, c);
2941 case XFRM_MSG_DELSA:
2942 case XFRM_MSG_NEWSA:
2943 case XFRM_MSG_UPDSA:
2944 return key_notify_sa(x, c);
2945 case XFRM_MSG_FLUSHSA:
2946 return key_notify_sa_flush(c);
2947 case XFRM_MSG_NEWAE: /* not yet supported */
2948 break;
2949 default:
2950 printk("pfkey: Unknown SA event %d\n", c->event);
2951 break;
2952 }
2953
2954 return 0;
2955 }
2956
2957 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2958 {
2959 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2960 return 0;
2961
2962 switch (c->event) {
2963 case XFRM_MSG_POLEXPIRE:
2964 return key_notify_policy_expire(xp, c);
2965 case XFRM_MSG_DELPOLICY:
2966 case XFRM_MSG_NEWPOLICY:
2967 case XFRM_MSG_UPDPOLICY:
2968 return key_notify_policy(xp, dir, c);
2969 case XFRM_MSG_FLUSHPOLICY:
2970 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2971 break;
2972 return key_notify_policy_flush(c);
2973 default:
2974 printk("pfkey: Unknown policy event %d\n", c->event);
2975 break;
2976 }
2977
2978 return 0;
2979 }
2980
2981 static u32 get_acqseq(void)
2982 {
2983 u32 res;
2984 static u32 acqseq;
2985 static DEFINE_SPINLOCK(acqseq_lock);
2986
2987 spin_lock_bh(&acqseq_lock);
2988 res = (++acqseq ? : ++acqseq);
2989 spin_unlock_bh(&acqseq_lock);
2990 return res;
2991 }
2992
2993 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2994 {
2995 struct sk_buff *skb;
2996 struct sadb_msg *hdr;
2997 struct sadb_address *addr;
2998 struct sadb_x_policy *pol;
2999 struct sockaddr_in *sin;
3000 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3001 struct sockaddr_in6 *sin6;
3002 #endif
3003 int sockaddr_size;
3004 int size;
3005 struct sadb_x_sec_ctx *sec_ctx;
3006 struct xfrm_sec_ctx *xfrm_ctx;
3007 int ctx_size = 0;
3008
3009 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3010 if (!sockaddr_size)
3011 return -EINVAL;
3012
3013 size = sizeof(struct sadb_msg) +
3014 (sizeof(struct sadb_address) * 2) +
3015 (sockaddr_size * 2) +
3016 sizeof(struct sadb_x_policy);
3017
3018 if (x->id.proto == IPPROTO_AH)
3019 size += count_ah_combs(t);
3020 else if (x->id.proto == IPPROTO_ESP)
3021 size += count_esp_combs(t);
3022
3023 if ((xfrm_ctx = x->security)) {
3024 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3025 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3026 }
3027
3028 skb = alloc_skb(size + 16, GFP_ATOMIC);
3029 if (skb == NULL)
3030 return -ENOMEM;
3031
3032 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3033 hdr->sadb_msg_version = PF_KEY_V2;
3034 hdr->sadb_msg_type = SADB_ACQUIRE;
3035 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3036 hdr->sadb_msg_len = size / sizeof(uint64_t);
3037 hdr->sadb_msg_errno = 0;
3038 hdr->sadb_msg_reserved = 0;
3039 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3040 hdr->sadb_msg_pid = 0;
3041
3042 /* src address */
3043 addr = (struct sadb_address*) skb_put(skb,
3044 sizeof(struct sadb_address)+sockaddr_size);
3045 addr->sadb_address_len =
3046 (sizeof(struct sadb_address)+sockaddr_size)/
3047 sizeof(uint64_t);
3048 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3049 addr->sadb_address_proto = 0;
3050 addr->sadb_address_reserved = 0;
3051 if (x->props.family == AF_INET) {
3052 addr->sadb_address_prefixlen = 32;
3053
3054 sin = (struct sockaddr_in *) (addr + 1);
3055 sin->sin_family = AF_INET;
3056 sin->sin_addr.s_addr = x->props.saddr.a4;
3057 sin->sin_port = 0;
3058 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3059 }
3060 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3061 else if (x->props.family == AF_INET6) {
3062 addr->sadb_address_prefixlen = 128;
3063
3064 sin6 = (struct sockaddr_in6 *) (addr + 1);
3065 sin6->sin6_family = AF_INET6;
3066 sin6->sin6_port = 0;
3067 sin6->sin6_flowinfo = 0;
3068 memcpy(&sin6->sin6_addr,
3069 x->props.saddr.a6, sizeof(struct in6_addr));
3070 sin6->sin6_scope_id = 0;
3071 }
3072 #endif
3073 else
3074 BUG();
3075
3076 /* dst address */
3077 addr = (struct sadb_address*) skb_put(skb,
3078 sizeof(struct sadb_address)+sockaddr_size);
3079 addr->sadb_address_len =
3080 (sizeof(struct sadb_address)+sockaddr_size)/
3081 sizeof(uint64_t);
3082 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3083 addr->sadb_address_proto = 0;
3084 addr->sadb_address_reserved = 0;
3085 if (x->props.family == AF_INET) {
3086 addr->sadb_address_prefixlen = 32;
3087
3088 sin = (struct sockaddr_in *) (addr + 1);
3089 sin->sin_family = AF_INET;
3090 sin->sin_addr.s_addr = x->id.daddr.a4;
3091 sin->sin_port = 0;
3092 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3093 }
3094 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3095 else if (x->props.family == AF_INET6) {
3096 addr->sadb_address_prefixlen = 128;
3097
3098 sin6 = (struct sockaddr_in6 *) (addr + 1);
3099 sin6->sin6_family = AF_INET6;
3100 sin6->sin6_port = 0;
3101 sin6->sin6_flowinfo = 0;
3102 memcpy(&sin6->sin6_addr,
3103 x->id.daddr.a6, sizeof(struct in6_addr));
3104 sin6->sin6_scope_id = 0;
3105 }
3106 #endif
3107 else
3108 BUG();
3109
3110 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3111 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3112 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3113 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3114 pol->sadb_x_policy_dir = dir+1;
3115 pol->sadb_x_policy_id = xp->index;
3116
3117 /* Set sadb_comb's. */
3118 if (x->id.proto == IPPROTO_AH)
3119 dump_ah_combs(skb, t);
3120 else if (x->id.proto == IPPROTO_ESP)
3121 dump_esp_combs(skb, t);
3122
3123 /* security context */
3124 if (xfrm_ctx) {
3125 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3126 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3127 sec_ctx->sadb_x_sec_len =
3128 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3129 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3130 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3131 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3132 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3133 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3134 xfrm_ctx->ctx_len);
3135 }
3136
3137 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3138 }
3139
3140 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3141 u8 *data, int len, int *dir)
3142 {
3143 struct xfrm_policy *xp;
3144 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3145 struct sadb_x_sec_ctx *sec_ctx;
3146
3147 switch (sk->sk_family) {
3148 case AF_INET:
3149 if (opt != IP_IPSEC_POLICY) {
3150 *dir = -EOPNOTSUPP;
3151 return NULL;
3152 }
3153 break;
3154 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3155 case AF_INET6:
3156 if (opt != IPV6_IPSEC_POLICY) {
3157 *dir = -EOPNOTSUPP;
3158 return NULL;
3159 }
3160 break;
3161 #endif
3162 default:
3163 *dir = -EINVAL;
3164 return NULL;
3165 }
3166
3167 *dir = -EINVAL;
3168
3169 if (len < sizeof(struct sadb_x_policy) ||
3170 pol->sadb_x_policy_len*8 > len ||
3171 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3172 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3173 return NULL;
3174
3175 xp = xfrm_policy_alloc(GFP_ATOMIC);
3176 if (xp == NULL) {
3177 *dir = -ENOBUFS;
3178 return NULL;
3179 }
3180
3181 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3182 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3183
3184 xp->lft.soft_byte_limit = XFRM_INF;
3185 xp->lft.hard_byte_limit = XFRM_INF;
3186 xp->lft.soft_packet_limit = XFRM_INF;
3187 xp->lft.hard_packet_limit = XFRM_INF;
3188 xp->family = sk->sk_family;
3189
3190 xp->xfrm_nr = 0;
3191 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3192 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3193 goto out;
3194
3195 /* security context too */
3196 if (len >= (pol->sadb_x_policy_len*8 +
3197 sizeof(struct sadb_x_sec_ctx))) {
3198 char *p = (char *)pol;
3199 struct xfrm_user_sec_ctx *uctx;
3200
3201 p += pol->sadb_x_policy_len*8;
3202 sec_ctx = (struct sadb_x_sec_ctx *)p;
3203 if (len < pol->sadb_x_policy_len*8 +
3204 sec_ctx->sadb_x_sec_len) {
3205 *dir = -EINVAL;
3206 goto out;
3207 }
3208 if ((*dir = verify_sec_ctx_len(p)))
3209 goto out;
3210 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3211 *dir = security_xfrm_policy_alloc(xp, uctx);
3212 kfree(uctx);
3213
3214 if (*dir)
3215 goto out;
3216 }
3217
3218 *dir = pol->sadb_x_policy_dir-1;
3219 return xp;
3220
3221 out:
3222 security_xfrm_policy_free(xp);
3223 kfree(xp);
3224 return NULL;
3225 }
3226
3227 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3228 {
3229 struct sk_buff *skb;
3230 struct sadb_msg *hdr;
3231 struct sadb_sa *sa;
3232 struct sadb_address *addr;
3233 struct sadb_x_nat_t_port *n_port;
3234 struct sockaddr_in *sin;
3235 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3236 struct sockaddr_in6 *sin6;
3237 #endif
3238 int sockaddr_size;
3239 int size;
3240 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3241 struct xfrm_encap_tmpl *natt = NULL;
3242
3243 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3244 if (!sockaddr_size)
3245 return -EINVAL;
3246
3247 if (!satype)
3248 return -EINVAL;
3249
3250 if (!x->encap)
3251 return -EINVAL;
3252
3253 natt = x->encap;
3254
3255 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3256 *
3257 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3258 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3259 */
3260
3261 size = sizeof(struct sadb_msg) +
3262 sizeof(struct sadb_sa) +
3263 (sizeof(struct sadb_address) * 2) +
3264 (sockaddr_size * 2) +
3265 (sizeof(struct sadb_x_nat_t_port) * 2);
3266
3267 skb = alloc_skb(size + 16, GFP_ATOMIC);
3268 if (skb == NULL)
3269 return -ENOMEM;
3270
3271 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3272 hdr->sadb_msg_version = PF_KEY_V2;
3273 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3274 hdr->sadb_msg_satype = satype;
3275 hdr->sadb_msg_len = size / sizeof(uint64_t);
3276 hdr->sadb_msg_errno = 0;
3277 hdr->sadb_msg_reserved = 0;
3278 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3279 hdr->sadb_msg_pid = 0;
3280
3281 /* SA */
3282 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3283 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3284 sa->sadb_sa_exttype = SADB_EXT_SA;
3285 sa->sadb_sa_spi = x->id.spi;
3286 sa->sadb_sa_replay = 0;
3287 sa->sadb_sa_state = 0;
3288 sa->sadb_sa_auth = 0;
3289 sa->sadb_sa_encrypt = 0;
3290 sa->sadb_sa_flags = 0;
3291
3292 /* ADDRESS_SRC (old addr) */
3293 addr = (struct sadb_address*)
3294 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3295 addr->sadb_address_len =
3296 (sizeof(struct sadb_address)+sockaddr_size)/
3297 sizeof(uint64_t);
3298 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3299 addr->sadb_address_proto = 0;
3300 addr->sadb_address_reserved = 0;
3301 if (x->props.family == AF_INET) {
3302 addr->sadb_address_prefixlen = 32;
3303
3304 sin = (struct sockaddr_in *) (addr + 1);
3305 sin->sin_family = AF_INET;
3306 sin->sin_addr.s_addr = x->props.saddr.a4;
3307 sin->sin_port = 0;
3308 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3309 }
3310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3311 else if (x->props.family == AF_INET6) {
3312 addr->sadb_address_prefixlen = 128;
3313
3314 sin6 = (struct sockaddr_in6 *) (addr + 1);
3315 sin6->sin6_family = AF_INET6;
3316 sin6->sin6_port = 0;
3317 sin6->sin6_flowinfo = 0;
3318 memcpy(&sin6->sin6_addr,
3319 x->props.saddr.a6, sizeof(struct in6_addr));
3320 sin6->sin6_scope_id = 0;
3321 }
3322 #endif
3323 else
3324 BUG();
3325
3326 /* NAT_T_SPORT (old port) */
3327 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3328 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3329 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3330 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3331 n_port->sadb_x_nat_t_port_reserved = 0;
3332
3333 /* ADDRESS_DST (new addr) */
3334 addr = (struct sadb_address*)
3335 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3336 addr->sadb_address_len =
3337 (sizeof(struct sadb_address)+sockaddr_size)/
3338 sizeof(uint64_t);
3339 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3340 addr->sadb_address_proto = 0;
3341 addr->sadb_address_reserved = 0;
3342 if (x->props.family == AF_INET) {
3343 addr->sadb_address_prefixlen = 32;
3344
3345 sin = (struct sockaddr_in *) (addr + 1);
3346 sin->sin_family = AF_INET;
3347 sin->sin_addr.s_addr = ipaddr->a4;
3348 sin->sin_port = 0;
3349 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3350 }
3351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3352 else if (x->props.family == AF_INET6) {
3353 addr->sadb_address_prefixlen = 128;
3354
3355 sin6 = (struct sockaddr_in6 *) (addr + 1);
3356 sin6->sin6_family = AF_INET6;
3357 sin6->sin6_port = 0;
3358 sin6->sin6_flowinfo = 0;
3359 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3360 sin6->sin6_scope_id = 0;
3361 }
3362 #endif
3363 else
3364 BUG();
3365
3366 /* NAT_T_DPORT (new port) */
3367 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3368 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3369 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3370 n_port->sadb_x_nat_t_port_port = sport;
3371 n_port->sadb_x_nat_t_port_reserved = 0;
3372
3373 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3374 }
3375
3376 #ifdef CONFIG_NET_KEY_MIGRATE
3377 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3378 struct xfrm_selector *sel)
3379 {
3380 struct sadb_address *addr;
3381 struct sockaddr_in *sin;
3382 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3383 struct sockaddr_in6 *sin6;
3384 #endif
3385 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3386 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3387 addr->sadb_address_exttype = type;
3388 addr->sadb_address_proto = sel->proto;
3389 addr->sadb_address_reserved = 0;
3390
3391 switch (type) {
3392 case SADB_EXT_ADDRESS_SRC:
3393 if (sel->family == AF_INET) {
3394 addr->sadb_address_prefixlen = sel->prefixlen_s;
3395 sin = (struct sockaddr_in *)(addr + 1);
3396 sin->sin_family = AF_INET;
3397 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3398 sizeof(sin->sin_addr.s_addr));
3399 sin->sin_port = 0;
3400 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3401 }
3402 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3403 else if (sel->family == AF_INET6) {
3404 addr->sadb_address_prefixlen = sel->prefixlen_s;
3405 sin6 = (struct sockaddr_in6 *)(addr + 1);
3406 sin6->sin6_family = AF_INET6;
3407 sin6->sin6_port = 0;
3408 sin6->sin6_flowinfo = 0;
3409 sin6->sin6_scope_id = 0;
3410 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3411 sizeof(sin6->sin6_addr.s6_addr));
3412 }
3413 #endif
3414 break;
3415 case SADB_EXT_ADDRESS_DST:
3416 if (sel->family == AF_INET) {
3417 addr->sadb_address_prefixlen = sel->prefixlen_d;
3418 sin = (struct sockaddr_in *)(addr + 1);
3419 sin->sin_family = AF_INET;
3420 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3421 sizeof(sin->sin_addr.s_addr));
3422 sin->sin_port = 0;
3423 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3424 }
3425 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3426 else if (sel->family == AF_INET6) {
3427 addr->sadb_address_prefixlen = sel->prefixlen_d;
3428 sin6 = (struct sockaddr_in6 *)(addr + 1);
3429 sin6->sin6_family = AF_INET6;
3430 sin6->sin6_port = 0;
3431 sin6->sin6_flowinfo = 0;
3432 sin6->sin6_scope_id = 0;
3433 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3434 sizeof(sin6->sin6_addr.s6_addr));
3435 }
3436 #endif
3437 break;
3438 default:
3439 return -EINVAL;
3440 }
3441
3442 return 0;
3443 }
3444
3445 static int set_ipsecrequest(struct sk_buff *skb,
3446 uint8_t proto, uint8_t mode, int level,
3447 uint32_t reqid, uint8_t family,
3448 xfrm_address_t *src, xfrm_address_t *dst)
3449 {
3450 struct sadb_x_ipsecrequest *rq;
3451 struct sockaddr_in *sin;
3452 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3453 struct sockaddr_in6 *sin6;
3454 #endif
3455 int size_req;
3456
3457 size_req = sizeof(struct sadb_x_ipsecrequest) +
3458 pfkey_sockaddr_pair_size(family);
3459
3460 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3461 memset(rq, 0, size_req);
3462 rq->sadb_x_ipsecrequest_len = size_req;
3463 rq->sadb_x_ipsecrequest_proto = proto;
3464 rq->sadb_x_ipsecrequest_mode = mode;
3465 rq->sadb_x_ipsecrequest_level = level;
3466 rq->sadb_x_ipsecrequest_reqid = reqid;
3467
3468 switch (family) {
3469 case AF_INET:
3470 sin = (struct sockaddr_in *)(rq + 1);
3471 sin->sin_family = AF_INET;
3472 memcpy(&sin->sin_addr.s_addr, src,
3473 sizeof(sin->sin_addr.s_addr));
3474 sin++;
3475 sin->sin_family = AF_INET;
3476 memcpy(&sin->sin_addr.s_addr, dst,
3477 sizeof(sin->sin_addr.s_addr));
3478 break;
3479 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3480 case AF_INET6:
3481 sin6 = (struct sockaddr_in6 *)(rq + 1);
3482 sin6->sin6_family = AF_INET6;
3483 sin6->sin6_port = 0;
3484 sin6->sin6_flowinfo = 0;
3485 sin6->sin6_scope_id = 0;
3486 memcpy(&sin6->sin6_addr.s6_addr, src,
3487 sizeof(sin6->sin6_addr.s6_addr));
3488 sin6++;
3489 sin6->sin6_family = AF_INET6;
3490 sin6->sin6_port = 0;
3491 sin6->sin6_flowinfo = 0;
3492 sin6->sin6_scope_id = 0;
3493 memcpy(&sin6->sin6_addr.s6_addr, dst,
3494 sizeof(sin6->sin6_addr.s6_addr));
3495 break;
3496 #endif
3497 default:
3498 return -EINVAL;
3499 }
3500
3501 return 0;
3502 }
3503 #endif
3504
3505 #ifdef CONFIG_NET_KEY_MIGRATE
3506 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3507 struct xfrm_migrate *m, int num_bundles)
3508 {
3509 int i;
3510 int sasize_sel;
3511 int size = 0;
3512 int size_pol = 0;
3513 struct sk_buff *skb;
3514 struct sadb_msg *hdr;
3515 struct sadb_x_policy *pol;
3516 struct xfrm_migrate *mp;
3517
3518 if (type != XFRM_POLICY_TYPE_MAIN)
3519 return 0;
3520
3521 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3522 return -EINVAL;
3523
3524 /* selector */
3525 sasize_sel = pfkey_sockaddr_size(sel->family);
3526 if (!sasize_sel)
3527 return -EINVAL;
3528 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3529
3530 /* policy info */
3531 size_pol += sizeof(struct sadb_x_policy);
3532
3533 /* ipsecrequests */
3534 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3535 /* old locator pair */
3536 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3537 pfkey_sockaddr_pair_size(mp->old_family);
3538 /* new locator pair */
3539 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3540 pfkey_sockaddr_pair_size(mp->new_family);
3541 }
3542
3543 size += sizeof(struct sadb_msg) + size_pol;
3544
3545 /* alloc buffer */
3546 skb = alloc_skb(size, GFP_ATOMIC);
3547 if (skb == NULL)
3548 return -ENOMEM;
3549
3550 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3551 hdr->sadb_msg_version = PF_KEY_V2;
3552 hdr->sadb_msg_type = SADB_X_MIGRATE;
3553 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3554 hdr->sadb_msg_len = size / 8;
3555 hdr->sadb_msg_errno = 0;
3556 hdr->sadb_msg_reserved = 0;
3557 hdr->sadb_msg_seq = 0;
3558 hdr->sadb_msg_pid = 0;
3559
3560 /* selector src */
3561 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3562
3563 /* selector dst */
3564 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3565
3566 /* policy information */
3567 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3568 pol->sadb_x_policy_len = size_pol / 8;
3569 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3570 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3571 pol->sadb_x_policy_dir = dir + 1;
3572 pol->sadb_x_policy_id = 0;
3573 pol->sadb_x_policy_priority = 0;
3574
3575 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3576 /* old ipsecrequest */
3577 int mode = pfkey_mode_from_xfrm(mp->mode);
3578 if (mode < 0)
3579 return -EINVAL;
3580 if (set_ipsecrequest(skb, mp->proto, mode,
3581 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3582 mp->reqid, mp->old_family,
3583 &mp->old_saddr, &mp->old_daddr) < 0) {
3584 return -EINVAL;
3585 }
3586
3587 /* new ipsecrequest */
3588 if (set_ipsecrequest(skb, mp->proto, mode,
3589 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3590 mp->reqid, mp->new_family,
3591 &mp->new_saddr, &mp->new_daddr) < 0) {
3592 return -EINVAL;
3593 }
3594 }
3595
3596 /* broadcast migrate message to sockets */
3597 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3598
3599 return 0;
3600 }
3601 #else
3602 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3603 struct xfrm_migrate *m, int num_bundles)
3604 {
3605 return -ENOPROTOOPT;
3606 }
3607 #endif
3608
3609 static int pfkey_sendmsg(struct kiocb *kiocb,
3610 struct socket *sock, struct msghdr *msg, size_t len)
3611 {
3612 struct sock *sk = sock->sk;
3613 struct sk_buff *skb = NULL;
3614 struct sadb_msg *hdr = NULL;
3615 int err;
3616
3617 err = -EOPNOTSUPP;
3618 if (msg->msg_flags & MSG_OOB)
3619 goto out;
3620
3621 err = -EMSGSIZE;
3622 if ((unsigned)len > sk->sk_sndbuf - 32)
3623 goto out;
3624
3625 err = -ENOBUFS;
3626 skb = alloc_skb(len, GFP_KERNEL);
3627 if (skb == NULL)
3628 goto out;
3629
3630 err = -EFAULT;
3631 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3632 goto out;
3633
3634 hdr = pfkey_get_base_msg(skb, &err);
3635 if (!hdr)
3636 goto out;
3637
3638 mutex_lock(&xfrm_cfg_mutex);
3639 err = pfkey_process(sk, skb, hdr);
3640 mutex_unlock(&xfrm_cfg_mutex);
3641
3642 out:
3643 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3644 err = 0;
3645 if (skb)
3646 kfree_skb(skb);
3647
3648 return err ? : len;
3649 }
3650
3651 static int pfkey_recvmsg(struct kiocb *kiocb,
3652 struct socket *sock, struct msghdr *msg, size_t len,
3653 int flags)
3654 {
3655 struct sock *sk = sock->sk;
3656 struct sk_buff *skb;
3657 int copied, err;
3658
3659 err = -EINVAL;
3660 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3661 goto out;
3662
3663 msg->msg_namelen = 0;
3664 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3665 if (skb == NULL)
3666 goto out;
3667
3668 copied = skb->len;
3669 if (copied > len) {
3670 msg->msg_flags |= MSG_TRUNC;
3671 copied = len;
3672 }
3673
3674 skb_reset_transport_header(skb);
3675 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3676 if (err)
3677 goto out_free;
3678
3679 sock_recv_timestamp(msg, sk, skb);
3680
3681 err = (flags & MSG_TRUNC) ? skb->len : copied;
3682
3683 out_free:
3684 skb_free_datagram(sk, skb);
3685 out:
3686 return err;
3687 }
3688
3689 static const struct proto_ops pfkey_ops = {
3690 .family = PF_KEY,
3691 .owner = THIS_MODULE,
3692 /* Operations that make no sense on pfkey sockets. */
3693 .bind = sock_no_bind,
3694 .connect = sock_no_connect,
3695 .socketpair = sock_no_socketpair,
3696 .accept = sock_no_accept,
3697 .getname = sock_no_getname,
3698 .ioctl = sock_no_ioctl,
3699 .listen = sock_no_listen,
3700 .shutdown = sock_no_shutdown,
3701 .setsockopt = sock_no_setsockopt,
3702 .getsockopt = sock_no_getsockopt,
3703 .mmap = sock_no_mmap,
3704 .sendpage = sock_no_sendpage,
3705
3706 /* Now the operations that really occur. */
3707 .release = pfkey_release,
3708 .poll = datagram_poll,
3709 .sendmsg = pfkey_sendmsg,
3710 .recvmsg = pfkey_recvmsg,
3711 };
3712
3713 static struct net_proto_family pfkey_family_ops = {
3714 .family = PF_KEY,
3715 .create = pfkey_create,
3716 .owner = THIS_MODULE,
3717 };
3718
3719 #ifdef CONFIG_PROC_FS
3720 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3721 int length, int *eof, void *data)
3722 {
3723 off_t pos = 0;
3724 off_t begin = 0;
3725 int len = 0;
3726 struct sock *s;
3727 struct hlist_node *node;
3728
3729 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3730
3731 read_lock(&pfkey_table_lock);
3732
3733 sk_for_each(s, node, &pfkey_table) {
3734 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3735 s,
3736 atomic_read(&s->sk_refcnt),
3737 atomic_read(&s->sk_rmem_alloc),
3738 atomic_read(&s->sk_wmem_alloc),
3739 sock_i_uid(s),
3740 sock_i_ino(s)
3741 );
3742
3743 buffer[len++] = '\n';
3744
3745 pos = begin + len;
3746 if (pos < offset) {
3747 len = 0;
3748 begin = pos;
3749 }
3750 if(pos > offset + length)
3751 goto done;
3752 }
3753 *eof = 1;
3754
3755 done:
3756 read_unlock(&pfkey_table_lock);
3757
3758 *start = buffer + (offset - begin);
3759 len -= (offset - begin);
3760
3761 if (len > length)
3762 len = length;
3763 if (len < 0)
3764 len = 0;
3765
3766 return len;
3767 }
3768 #endif
3769
3770 static struct xfrm_mgr pfkeyv2_mgr =
3771 {
3772 .id = "pfkeyv2",
3773 .notify = pfkey_send_notify,
3774 .acquire = pfkey_send_acquire,
3775 .compile_policy = pfkey_compile_policy,
3776 .new_mapping = pfkey_send_new_mapping,
3777 .notify_policy = pfkey_send_policy_notify,
3778 .migrate = pfkey_send_migrate,
3779 };
3780
3781 static void __exit ipsec_pfkey_exit(void)
3782 {
3783 xfrm_unregister_km(&pfkeyv2_mgr);
3784 remove_proc_entry("net/pfkey", NULL);
3785 sock_unregister(PF_KEY);
3786 proto_unregister(&key_proto);
3787 }
3788
3789 static int __init ipsec_pfkey_init(void)
3790 {
3791 int err = proto_register(&key_proto, 0);
3792
3793 if (err != 0)
3794 goto out;
3795
3796 err = sock_register(&pfkey_family_ops);
3797 if (err != 0)
3798 goto out_unregister_key_proto;
3799 #ifdef CONFIG_PROC_FS
3800 err = -ENOMEM;
3801 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3802 goto out_sock_unregister;
3803 #endif
3804 err = xfrm_register_km(&pfkeyv2_mgr);
3805 if (err != 0)
3806 goto out_remove_proc_entry;
3807 out:
3808 return err;
3809 out_remove_proc_entry:
3810 #ifdef CONFIG_PROC_FS
3811 remove_proc_entry("net/pfkey", NULL);
3812 out_sock_unregister:
3813 #endif
3814 sock_unregister(PF_KEY);
3815 out_unregister_key_proto:
3816 proto_unregister(&key_proto);
3817 goto out;
3818 }
3819
3820 module_init(ipsec_pfkey_init);
3821 module_exit(ipsec_pfkey_exit);
3822 MODULE_LICENSE("GPL");
3823 MODULE_ALIAS_NETPROTO(PF_KEY);
USB Experimental Work