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Revert "kbuild: make better section mismatch reports on i386, arm and mips"
[linux-2.6/libata-dev.git] / net / key / af_key.c
blobd302ddae580c567b19dc7edc3925f883453bc126
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
1686 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1687 if (proto == 0)
1688 return -EINVAL;
1689
1690 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1691 audit_info.secid = 0;
1692 xfrm_state_flush(proto, &audit_info);
1693 c.data.proto = proto;
1694 c.seq = hdr->sadb_msg_seq;
1695 c.pid = hdr->sadb_msg_pid;
1696 c.event = XFRM_MSG_FLUSHSA;
1697 km_state_notify(NULL, &c);
1698
1699 return 0;
1700 }
1701
1702 struct pfkey_dump_data
1703 {
1704 struct sk_buff *skb;
1705 struct sadb_msg *hdr;
1706 struct sock *sk;
1707 };
1708
1709 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1710 {
1711 struct pfkey_dump_data *data = ptr;
1712 struct sk_buff *out_skb;
1713 struct sadb_msg *out_hdr;
1714
1715 out_skb = pfkey_xfrm_state2msg(x, 1, 3);
1716 if (IS_ERR(out_skb))
1717 return PTR_ERR(out_skb);
1718
1719 out_hdr = (struct sadb_msg *) out_skb->data;
1720 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1721 out_hdr->sadb_msg_type = SADB_DUMP;
1722 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1723 out_hdr->sadb_msg_errno = 0;
1724 out_hdr->sadb_msg_reserved = 0;
1725 out_hdr->sadb_msg_seq = count;
1726 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1727 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1728 return 0;
1729 }
1730
1731 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1732 {
1733 u8 proto;
1734 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1735
1736 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1737 if (proto == 0)
1738 return -EINVAL;
1739
1740 return xfrm_state_walk(proto, dump_sa, &data);
1741 }
1742
1743 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1744 {
1745 struct pfkey_sock *pfk = pfkey_sk(sk);
1746 int satype = hdr->sadb_msg_satype;
1747
1748 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1749 /* XXX we mangle packet... */
1750 hdr->sadb_msg_errno = 0;
1751 if (satype != 0 && satype != 1)
1752 return -EINVAL;
1753 pfk->promisc = satype;
1754 }
1755 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1756 return 0;
1757 }
1758
1759 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1760 {
1761 int i;
1762 u32 reqid = *(u32*)ptr;
1763
1764 for (i=0; i<xp->xfrm_nr; i++) {
1765 if (xp->xfrm_vec[i].reqid == reqid)
1766 return -EEXIST;
1767 }
1768 return 0;
1769 }
1770
1771 static u32 gen_reqid(void)
1772 {
1773 u32 start;
1774 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1775
1776 start = reqid;
1777 do {
1778 ++reqid;
1779 if (reqid == 0)
1780 reqid = IPSEC_MANUAL_REQID_MAX+1;
1781 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1782 (void*)&reqid) != -EEXIST)
1783 return reqid;
1784 } while (reqid != start);
1785 return 0;
1786 }
1787
1788 static int
1789 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1790 {
1791 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1792 struct sockaddr_in *sin;
1793 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1794 struct sockaddr_in6 *sin6;
1795 #endif
1796 int mode;
1797
1798 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1799 return -ELOOP;
1800
1801 if (rq->sadb_x_ipsecrequest_mode == 0)
1802 return -EINVAL;
1803
1804 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1805 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1806 return -EINVAL;
1807 t->mode = mode;
1808 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1809 t->optional = 1;
1810 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1811 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1812 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1813 t->reqid = 0;
1814 if (!t->reqid && !(t->reqid = gen_reqid()))
1815 return -ENOBUFS;
1816 }
1817
1818 /* addresses present only in tunnel mode */
1819 if (t->mode == XFRM_MODE_TUNNEL) {
1820 struct sockaddr *sa;
1821 sa = (struct sockaddr *)(rq+1);
1822 switch(sa->sa_family) {
1823 case AF_INET:
1824 sin = (struct sockaddr_in*)sa;
1825 t->saddr.a4 = sin->sin_addr.s_addr;
1826 sin++;
1827 if (sin->sin_family != AF_INET)
1828 return -EINVAL;
1829 t->id.daddr.a4 = sin->sin_addr.s_addr;
1830 break;
1831 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1832 case AF_INET6:
1833 sin6 = (struct sockaddr_in6*)sa;
1834 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1835 sin6++;
1836 if (sin6->sin6_family != AF_INET6)
1837 return -EINVAL;
1838 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1839 break;
1840 #endif
1841 default:
1842 return -EINVAL;
1843 }
1844 t->encap_family = sa->sa_family;
1845 } else
1846 t->encap_family = xp->family;
1847
1848 /* No way to set this via kame pfkey */
1849 t->aalgos = t->ealgos = t->calgos = ~0;
1850 xp->xfrm_nr++;
1851 return 0;
1852 }
1853
1854 static int
1855 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1856 {
1857 int err;
1858 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1859 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1860
1861 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1862 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1863 return err;
1864 len -= rq->sadb_x_ipsecrequest_len;
1865 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1866 }
1867 return 0;
1868 }
1869
1870 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1871 {
1872 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1873
1874 if (xfrm_ctx) {
1875 int len = sizeof(struct sadb_x_sec_ctx);
1876 len += xfrm_ctx->ctx_len;
1877 return PFKEY_ALIGN8(len);
1878 }
1879 return 0;
1880 }
1881
1882 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1883 {
1884 struct xfrm_tmpl *t;
1885 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1886 int socklen = 0;
1887 int i;
1888
1889 for (i=0; i<xp->xfrm_nr; i++) {
1890 t = xp->xfrm_vec + i;
1891 socklen += (t->encap_family == AF_INET ?
1892 sizeof(struct sockaddr_in) :
1893 sizeof(struct sockaddr_in6));
1894 }
1895
1896 return sizeof(struct sadb_msg) +
1897 (sizeof(struct sadb_lifetime) * 3) +
1898 (sizeof(struct sadb_address) * 2) +
1899 (sockaddr_size * 2) +
1900 sizeof(struct sadb_x_policy) +
1901 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1902 (socklen * 2) +
1903 pfkey_xfrm_policy2sec_ctx_size(xp);
1904 }
1905
1906 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1907 {
1908 struct sk_buff *skb;
1909 int size;
1910
1911 size = pfkey_xfrm_policy2msg_size(xp);
1912
1913 skb = alloc_skb(size + 16, GFP_ATOMIC);
1914 if (skb == NULL)
1915 return ERR_PTR(-ENOBUFS);
1916
1917 return skb;
1918 }
1919
1920 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1921 {
1922 struct sadb_msg *hdr;
1923 struct sadb_address *addr;
1924 struct sadb_lifetime *lifetime;
1925 struct sadb_x_policy *pol;
1926 struct sockaddr_in *sin;
1927 struct sadb_x_sec_ctx *sec_ctx;
1928 struct xfrm_sec_ctx *xfrm_ctx;
1929 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1930 struct sockaddr_in6 *sin6;
1931 #endif
1932 int i;
1933 int size;
1934 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1935 int socklen = (xp->family == AF_INET ?
1936 sizeof(struct sockaddr_in) :
1937 sizeof(struct sockaddr_in6));
1938
1939 size = pfkey_xfrm_policy2msg_size(xp);
1940
1941 /* call should fill header later */
1942 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1943 memset(hdr, 0, size); /* XXX do we need this ? */
1944
1945 /* src address */
1946 addr = (struct sadb_address*) skb_put(skb,
1947 sizeof(struct sadb_address)+sockaddr_size);
1948 addr->sadb_address_len =
1949 (sizeof(struct sadb_address)+sockaddr_size)/
1950 sizeof(uint64_t);
1951 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1952 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1953 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1954 addr->sadb_address_reserved = 0;
1955 /* src address */
1956 if (xp->family == AF_INET) {
1957 sin = (struct sockaddr_in *) (addr + 1);
1958 sin->sin_family = AF_INET;
1959 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1960 sin->sin_port = xp->selector.sport;
1961 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1962 }
1963 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1964 else if (xp->family == AF_INET6) {
1965 sin6 = (struct sockaddr_in6 *) (addr + 1);
1966 sin6->sin6_family = AF_INET6;
1967 sin6->sin6_port = xp->selector.sport;
1968 sin6->sin6_flowinfo = 0;
1969 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1970 sizeof(struct in6_addr));
1971 sin6->sin6_scope_id = 0;
1972 }
1973 #endif
1974 else
1975 BUG();
1976
1977 /* dst address */
1978 addr = (struct sadb_address*) skb_put(skb,
1979 sizeof(struct sadb_address)+sockaddr_size);
1980 addr->sadb_address_len =
1981 (sizeof(struct sadb_address)+sockaddr_size)/
1982 sizeof(uint64_t);
1983 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1984 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1985 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1986 addr->sadb_address_reserved = 0;
1987 if (xp->family == AF_INET) {
1988 sin = (struct sockaddr_in *) (addr + 1);
1989 sin->sin_family = AF_INET;
1990 sin->sin_addr.s_addr = xp->selector.daddr.a4;
1991 sin->sin_port = xp->selector.dport;
1992 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1993 }
1994 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1995 else if (xp->family == AF_INET6) {
1996 sin6 = (struct sockaddr_in6 *) (addr + 1);
1997 sin6->sin6_family = AF_INET6;
1998 sin6->sin6_port = xp->selector.dport;
1999 sin6->sin6_flowinfo = 0;
2000 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2001 sizeof(struct in6_addr));
2002 sin6->sin6_scope_id = 0;
2003 }
2004 #endif
2005 else
2006 BUG();
2007
2008 /* hard time */
2009 lifetime = (struct sadb_lifetime *) skb_put(skb,
2010 sizeof(struct sadb_lifetime));
2011 lifetime->sadb_lifetime_len =
2012 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2013 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2014 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2015 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2016 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2017 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2018 /* soft time */
2019 lifetime = (struct sadb_lifetime *) skb_put(skb,
2020 sizeof(struct sadb_lifetime));
2021 lifetime->sadb_lifetime_len =
2022 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2023 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2024 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2025 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2026 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2027 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2028 /* current time */
2029 lifetime = (struct sadb_lifetime *) skb_put(skb,
2030 sizeof(struct sadb_lifetime));
2031 lifetime->sadb_lifetime_len =
2032 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2033 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2034 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2035 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2036 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2037 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2038
2039 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2040 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2041 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2042 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2043 if (xp->action == XFRM_POLICY_ALLOW) {
2044 if (xp->xfrm_nr)
2045 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2046 else
2047 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2048 }
2049 pol->sadb_x_policy_dir = dir+1;
2050 pol->sadb_x_policy_id = xp->index;
2051 pol->sadb_x_policy_priority = xp->priority;
2052
2053 for (i=0; i<xp->xfrm_nr; i++) {
2054 struct sadb_x_ipsecrequest *rq;
2055 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2056 int req_size;
2057 int mode;
2058
2059 req_size = sizeof(struct sadb_x_ipsecrequest);
2060 if (t->mode == XFRM_MODE_TUNNEL)
2061 req_size += ((t->encap_family == AF_INET ?
2062 sizeof(struct sockaddr_in) :
2063 sizeof(struct sockaddr_in6)) * 2);
2064 else
2065 size -= 2*socklen;
2066 rq = (void*)skb_put(skb, req_size);
2067 pol->sadb_x_policy_len += req_size/8;
2068 memset(rq, 0, sizeof(*rq));
2069 rq->sadb_x_ipsecrequest_len = req_size;
2070 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2071 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2072 return -EINVAL;
2073 rq->sadb_x_ipsecrequest_mode = mode;
2074 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2075 if (t->reqid)
2076 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2077 if (t->optional)
2078 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2079 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2080 if (t->mode == XFRM_MODE_TUNNEL) {
2081 switch (t->encap_family) {
2082 case AF_INET:
2083 sin = (void*)(rq+1);
2084 sin->sin_family = AF_INET;
2085 sin->sin_addr.s_addr = t->saddr.a4;
2086 sin->sin_port = 0;
2087 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2088 sin++;
2089 sin->sin_family = AF_INET;
2090 sin->sin_addr.s_addr = t->id.daddr.a4;
2091 sin->sin_port = 0;
2092 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2093 break;
2094 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2095 case AF_INET6:
2096 sin6 = (void*)(rq+1);
2097 sin6->sin6_family = AF_INET6;
2098 sin6->sin6_port = 0;
2099 sin6->sin6_flowinfo = 0;
2100 memcpy(&sin6->sin6_addr, t->saddr.a6,
2101 sizeof(struct in6_addr));
2102 sin6->sin6_scope_id = 0;
2103
2104 sin6++;
2105 sin6->sin6_family = AF_INET6;
2106 sin6->sin6_port = 0;
2107 sin6->sin6_flowinfo = 0;
2108 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2109 sizeof(struct in6_addr));
2110 sin6->sin6_scope_id = 0;
2111 break;
2112 #endif
2113 default:
2114 break;
2115 }
2116 }
2117 }
2118
2119 /* security context */
2120 if ((xfrm_ctx = xp->security)) {
2121 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2122
2123 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2124 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2125 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2126 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2127 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2128 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2129 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2130 xfrm_ctx->ctx_len);
2131 }
2132
2133 hdr->sadb_msg_len = size / sizeof(uint64_t);
2134 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2135
2136 return 0;
2137 }
2138
2139 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2140 {
2141 struct sk_buff *out_skb;
2142 struct sadb_msg *out_hdr;
2143 int err;
2144
2145 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2146 if (IS_ERR(out_skb)) {
2147 err = PTR_ERR(out_skb);
2148 goto out;
2149 }
2150 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2151 if (err < 0)
2152 return err;
2153
2154 out_hdr = (struct sadb_msg *) out_skb->data;
2155 out_hdr->sadb_msg_version = PF_KEY_V2;
2156
2157 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2158 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2159 else
2160 out_hdr->sadb_msg_type = event2poltype(c->event);
2161 out_hdr->sadb_msg_errno = 0;
2162 out_hdr->sadb_msg_seq = c->seq;
2163 out_hdr->sadb_msg_pid = c->pid;
2164 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2165 out:
2166 return 0;
2167
2168 }
2169
2170 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2171 {
2172 int err = 0;
2173 struct sadb_lifetime *lifetime;
2174 struct sadb_address *sa;
2175 struct sadb_x_policy *pol;
2176 struct xfrm_policy *xp;
2177 struct km_event c;
2178 struct sadb_x_sec_ctx *sec_ctx;
2179
2180 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2181 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2182 !ext_hdrs[SADB_X_EXT_POLICY-1])
2183 return -EINVAL;
2184
2185 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2186 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2187 return -EINVAL;
2188 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2189 return -EINVAL;
2190
2191 xp = xfrm_policy_alloc(GFP_KERNEL);
2192 if (xp == NULL)
2193 return -ENOBUFS;
2194
2195 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2196 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2197 xp->priority = pol->sadb_x_policy_priority;
2198
2199 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2200 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2201 if (!xp->family) {
2202 err = -EINVAL;
2203 goto out;
2204 }
2205 xp->selector.family = xp->family;
2206 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2207 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2208 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2209 if (xp->selector.sport)
2210 xp->selector.sport_mask = htons(0xffff);
2211
2212 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2213 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2214 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2215
2216 /* Amusing, we set this twice. KAME apps appear to set same value
2217 * in both addresses.
2218 */
2219 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2220
2221 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2222 if (xp->selector.dport)
2223 xp->selector.dport_mask = htons(0xffff);
2224
2225 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2226 if (sec_ctx != NULL) {
2227 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2228
2229 if (!uctx) {
2230 err = -ENOBUFS;
2231 goto out;
2232 }
2233
2234 err = security_xfrm_policy_alloc(xp, uctx);
2235 kfree(uctx);
2236
2237 if (err)
2238 goto out;
2239 }
2240
2241 xp->lft.soft_byte_limit = XFRM_INF;
2242 xp->lft.hard_byte_limit = XFRM_INF;
2243 xp->lft.soft_packet_limit = XFRM_INF;
2244 xp->lft.hard_packet_limit = XFRM_INF;
2245 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2246 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2247 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2248 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2249 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2250 }
2251 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2252 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2253 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2254 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2255 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2256 }
2257 xp->xfrm_nr = 0;
2258 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2259 (err = parse_ipsecrequests(xp, pol)) < 0)
2260 goto out;
2261
2262 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2263 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2264
2265 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2266 AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL);
2267
2268 if (err)
2269 goto out;
2270
2271 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2272 c.event = XFRM_MSG_UPDPOLICY;
2273 else
2274 c.event = XFRM_MSG_NEWPOLICY;
2275
2276 c.seq = hdr->sadb_msg_seq;
2277 c.pid = hdr->sadb_msg_pid;
2278
2279 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2280 xfrm_pol_put(xp);
2281 return 0;
2282
2283 out:
2284 security_xfrm_policy_free(xp);
2285 kfree(xp);
2286 return err;
2287 }
2288
2289 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2290 {
2291 int err;
2292 struct sadb_address *sa;
2293 struct sadb_x_policy *pol;
2294 struct xfrm_policy *xp, tmp;
2295 struct xfrm_selector sel;
2296 struct km_event c;
2297 struct sadb_x_sec_ctx *sec_ctx;
2298
2299 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2300 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2301 !ext_hdrs[SADB_X_EXT_POLICY-1])
2302 return -EINVAL;
2303
2304 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2305 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2306 return -EINVAL;
2307
2308 memset(&sel, 0, sizeof(sel));
2309
2310 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2311 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2312 sel.prefixlen_s = sa->sadb_address_prefixlen;
2313 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2314 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2315 if (sel.sport)
2316 sel.sport_mask = htons(0xffff);
2317
2318 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2319 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2320 sel.prefixlen_d = sa->sadb_address_prefixlen;
2321 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2322 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2323 if (sel.dport)
2324 sel.dport_mask = htons(0xffff);
2325
2326 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2327 memset(&tmp, 0, sizeof(struct xfrm_policy));
2328
2329 if (sec_ctx != NULL) {
2330 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2331
2332 if (!uctx)
2333 return -ENOMEM;
2334
2335 err = security_xfrm_policy_alloc(&tmp, uctx);
2336 kfree(uctx);
2337
2338 if (err)
2339 return err;
2340 }
2341
2342 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2343 &sel, tmp.security, 1, &err);
2344 security_xfrm_policy_free(&tmp);
2345
2346 if (xp == NULL)
2347 return -ENOENT;
2348
2349 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2350 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2351
2352 if (err)
2353 goto out;
2354
2355 c.seq = hdr->sadb_msg_seq;
2356 c.pid = hdr->sadb_msg_pid;
2357 c.event = XFRM_MSG_DELPOLICY;
2358 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2359
2360 out:
2361 xfrm_pol_put(xp);
2362 return err;
2363 }
2364
2365 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2366 {
2367 int err;
2368 struct sk_buff *out_skb;
2369 struct sadb_msg *out_hdr;
2370 err = 0;
2371
2372 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2373 if (IS_ERR(out_skb)) {
2374 err = PTR_ERR(out_skb);
2375 goto out;
2376 }
2377 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2378 if (err < 0)
2379 goto out;
2380
2381 out_hdr = (struct sadb_msg *) out_skb->data;
2382 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2383 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2384 out_hdr->sadb_msg_satype = 0;
2385 out_hdr->sadb_msg_errno = 0;
2386 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2387 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2388 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2389 err = 0;
2390
2391 out:
2392 return err;
2393 }
2394
2395 #ifdef CONFIG_NET_KEY_MIGRATE
2396 static int pfkey_sockaddr_pair_size(sa_family_t family)
2397 {
2398 switch (family) {
2399 case AF_INET:
2400 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2401 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2402 case AF_INET6:
2403 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2404 #endif
2405 default:
2406 return 0;
2407 }
2408 /* NOTREACHED */
2409 }
2410
2411 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2412 xfrm_address_t *saddr, xfrm_address_t *daddr,
2413 u16 *family)
2414 {
2415 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2416 if (rq->sadb_x_ipsecrequest_len <
2417 pfkey_sockaddr_pair_size(sa->sa_family))
2418 return -EINVAL;
2419
2420 switch (sa->sa_family) {
2421 case AF_INET:
2422 {
2423 struct sockaddr_in *sin;
2424 sin = (struct sockaddr_in *)sa;
2425 if ((sin+1)->sin_family != AF_INET)
2426 return -EINVAL;
2427 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2428 sin++;
2429 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2430 *family = AF_INET;
2431 break;
2432 }
2433 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2434 case AF_INET6:
2435 {
2436 struct sockaddr_in6 *sin6;
2437 sin6 = (struct sockaddr_in6 *)sa;
2438 if ((sin6+1)->sin6_family != AF_INET6)
2439 return -EINVAL;
2440 memcpy(&saddr->a6, &sin6->sin6_addr,
2441 sizeof(saddr->a6));
2442 sin6++;
2443 memcpy(&daddr->a6, &sin6->sin6_addr,
2444 sizeof(daddr->a6));
2445 *family = AF_INET6;
2446 break;
2447 }
2448 #endif
2449 default:
2450 return -EINVAL;
2451 }
2452
2453 return 0;
2454 }
2455
2456 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2457 struct xfrm_migrate *m)
2458 {
2459 int err;
2460 struct sadb_x_ipsecrequest *rq2;
2461 int mode;
2462
2463 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2464 len < rq1->sadb_x_ipsecrequest_len)
2465 return -EINVAL;
2466
2467 /* old endoints */
2468 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2469 &m->old_family);
2470 if (err)
2471 return err;
2472
2473 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2474 len -= rq1->sadb_x_ipsecrequest_len;
2475
2476 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2477 len < rq2->sadb_x_ipsecrequest_len)
2478 return -EINVAL;
2479
2480 /* new endpoints */
2481 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2482 &m->new_family);
2483 if (err)
2484 return err;
2485
2486 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2487 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2488 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2489 return -EINVAL;
2490
2491 m->proto = rq1->sadb_x_ipsecrequest_proto;
2492 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2493 return -EINVAL;
2494 m->mode = mode;
2495 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2496
2497 return ((int)(rq1->sadb_x_ipsecrequest_len +
2498 rq2->sadb_x_ipsecrequest_len));
2499 }
2500
2501 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2502 struct sadb_msg *hdr, void **ext_hdrs)
2503 {
2504 int i, len, ret, err = -EINVAL;
2505 u8 dir;
2506 struct sadb_address *sa;
2507 struct sadb_x_policy *pol;
2508 struct sadb_x_ipsecrequest *rq;
2509 struct xfrm_selector sel;
2510 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2511
2512 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2513 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2514 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2515 err = -EINVAL;
2516 goto out;
2517 }
2518
2519 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2520 if (!pol) {
2521 err = -EINVAL;
2522 goto out;
2523 }
2524
2525 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2526 err = -EINVAL;
2527 goto out;
2528 }
2529
2530 dir = pol->sadb_x_policy_dir - 1;
2531 memset(&sel, 0, sizeof(sel));
2532
2533 /* set source address info of selector */
2534 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2535 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2536 sel.prefixlen_s = sa->sadb_address_prefixlen;
2537 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2538 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2539 if (sel.sport)
2540 sel.sport_mask = ~0;
2541
2542 /* set destination address info of selector */
2543 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2544 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2545 sel.prefixlen_d = sa->sadb_address_prefixlen;
2546 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2547 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2548 if (sel.dport)
2549 sel.dport_mask = ~0;
2550
2551 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2552
2553 /* extract ipsecrequests */
2554 i = 0;
2555 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2556
2557 while (len > 0 && i < XFRM_MAX_DEPTH) {
2558 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2559 if (ret < 0) {
2560 err = ret;
2561 goto out;
2562 } else {
2563 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2564 len -= ret;
2565 i++;
2566 }
2567 }
2568
2569 if (!i || len > 0) {
2570 err = -EINVAL;
2571 goto out;
2572 }
2573
2574 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2575
2576 out:
2577 return err;
2578 }
2579 #else
2580 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2581 struct sadb_msg *hdr, void **ext_hdrs)
2582 {
2583 return -ENOPROTOOPT;
2584 }
2585 #endif
2586
2587
2588 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2589 {
2590 unsigned int dir;
2591 int err = 0, delete;
2592 struct sadb_x_policy *pol;
2593 struct xfrm_policy *xp;
2594 struct km_event c;
2595
2596 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2597 return -EINVAL;
2598
2599 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2600 if (dir >= XFRM_POLICY_MAX)
2601 return -EINVAL;
2602
2603 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2604 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2605 delete, &err);
2606 if (xp == NULL)
2607 return -ENOENT;
2608
2609 if (delete) {
2610 xfrm_audit_log(audit_get_loginuid(current->audit_context), 0,
2611 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
2612
2613 if (err)
2614 goto out;
2615 c.seq = hdr->sadb_msg_seq;
2616 c.pid = hdr->sadb_msg_pid;
2617 c.data.byid = 1;
2618 c.event = XFRM_MSG_DELPOLICY;
2619 km_policy_notify(xp, dir, &c);
2620 } else {
2621 err = key_pol_get_resp(sk, xp, hdr, dir);
2622 }
2623
2624 out:
2625 xfrm_pol_put(xp);
2626 return err;
2627 }
2628
2629 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2630 {
2631 struct pfkey_dump_data *data = ptr;
2632 struct sk_buff *out_skb;
2633 struct sadb_msg *out_hdr;
2634 int err;
2635
2636 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2637 if (IS_ERR(out_skb))
2638 return PTR_ERR(out_skb);
2639
2640 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2641 if (err < 0)
2642 return err;
2643
2644 out_hdr = (struct sadb_msg *) out_skb->data;
2645 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2646 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2647 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2648 out_hdr->sadb_msg_errno = 0;
2649 out_hdr->sadb_msg_seq = count;
2650 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2651 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2652 return 0;
2653 }
2654
2655 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2656 {
2657 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2658
2659 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2660 }
2661
2662 static int key_notify_policy_flush(struct km_event *c)
2663 {
2664 struct sk_buff *skb_out;
2665 struct sadb_msg *hdr;
2666
2667 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2668 if (!skb_out)
2669 return -ENOBUFS;
2670 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2671 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2672 hdr->sadb_msg_seq = c->seq;
2673 hdr->sadb_msg_pid = c->pid;
2674 hdr->sadb_msg_version = PF_KEY_V2;
2675 hdr->sadb_msg_errno = (uint8_t) 0;
2676 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2677 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2678 return 0;
2679
2680 }
2681
2682 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2683 {
2684 struct km_event c;
2685 struct xfrm_audit audit_info;
2686
2687 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2688 audit_info.secid = 0;
2689 xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2690 c.data.type = XFRM_POLICY_TYPE_MAIN;
2691 c.event = XFRM_MSG_FLUSHPOLICY;
2692 c.pid = hdr->sadb_msg_pid;
2693 c.seq = hdr->sadb_msg_seq;
2694 km_policy_notify(NULL, 0, &c);
2695
2696 return 0;
2697 }
2698
2699 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2700 struct sadb_msg *hdr, void **ext_hdrs);
2701 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2702 [SADB_RESERVED] = pfkey_reserved,
2703 [SADB_GETSPI] = pfkey_getspi,
2704 [SADB_UPDATE] = pfkey_add,
2705 [SADB_ADD] = pfkey_add,
2706 [SADB_DELETE] = pfkey_delete,
2707 [SADB_GET] = pfkey_get,
2708 [SADB_ACQUIRE] = pfkey_acquire,
2709 [SADB_REGISTER] = pfkey_register,
2710 [SADB_EXPIRE] = NULL,
2711 [SADB_FLUSH] = pfkey_flush,
2712 [SADB_DUMP] = pfkey_dump,
2713 [SADB_X_PROMISC] = pfkey_promisc,
2714 [SADB_X_PCHANGE] = NULL,
2715 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2716 [SADB_X_SPDADD] = pfkey_spdadd,
2717 [SADB_X_SPDDELETE] = pfkey_spddelete,
2718 [SADB_X_SPDGET] = pfkey_spdget,
2719 [SADB_X_SPDACQUIRE] = NULL,
2720 [SADB_X_SPDDUMP] = pfkey_spddump,
2721 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2722 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2723 [SADB_X_SPDDELETE2] = pfkey_spdget,
2724 [SADB_X_MIGRATE] = pfkey_migrate,
2725 };
2726
2727 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2728 {
2729 void *ext_hdrs[SADB_EXT_MAX];
2730 int err;
2731
2732 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2733 BROADCAST_PROMISC_ONLY, NULL);
2734
2735 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2736 err = parse_exthdrs(skb, hdr, ext_hdrs);
2737 if (!err) {
2738 err = -EOPNOTSUPP;
2739 if (pfkey_funcs[hdr->sadb_msg_type])
2740 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2741 }
2742 return err;
2743 }
2744
2745 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2746 {
2747 struct sadb_msg *hdr = NULL;
2748
2749 if (skb->len < sizeof(*hdr)) {
2750 *errp = -EMSGSIZE;
2751 } else {
2752 hdr = (struct sadb_msg *) skb->data;
2753 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2754 hdr->sadb_msg_reserved != 0 ||
2755 (hdr->sadb_msg_type <= SADB_RESERVED ||
2756 hdr->sadb_msg_type > SADB_MAX)) {
2757 hdr = NULL;
2758 *errp = -EINVAL;
2759 } else if (hdr->sadb_msg_len != (skb->len /
2760 sizeof(uint64_t)) ||
2761 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2762 sizeof(uint64_t))) {
2763 hdr = NULL;
2764 *errp = -EMSGSIZE;
2765 } else {
2766 *errp = 0;
2767 }
2768 }
2769 return hdr;
2770 }
2771
2772 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2773 {
2774 return t->aalgos & (1 << d->desc.sadb_alg_id);
2775 }
2776
2777 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2778 {
2779 return t->ealgos & (1 << d->desc.sadb_alg_id);
2780 }
2781
2782 static int count_ah_combs(struct xfrm_tmpl *t)
2783 {
2784 int i, sz = 0;
2785
2786 for (i = 0; ; i++) {
2787 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2788 if (!aalg)
2789 break;
2790 if (aalg_tmpl_set(t, aalg) && aalg->available)
2791 sz += sizeof(struct sadb_comb);
2792 }
2793 return sz + sizeof(struct sadb_prop);
2794 }
2795
2796 static int count_esp_combs(struct xfrm_tmpl *t)
2797 {
2798 int i, k, sz = 0;
2799
2800 for (i = 0; ; i++) {
2801 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2802 if (!ealg)
2803 break;
2804
2805 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2806 continue;
2807
2808 for (k = 1; ; k++) {
2809 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2810 if (!aalg)
2811 break;
2812
2813 if (aalg_tmpl_set(t, aalg) && aalg->available)
2814 sz += sizeof(struct sadb_comb);
2815 }
2816 }
2817 return sz + sizeof(struct sadb_prop);
2818 }
2819
2820 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2821 {
2822 struct sadb_prop *p;
2823 int i;
2824
2825 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2826 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2827 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2828 p->sadb_prop_replay = 32;
2829 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2830
2831 for (i = 0; ; i++) {
2832 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2833 if (!aalg)
2834 break;
2835
2836 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2837 struct sadb_comb *c;
2838 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2839 memset(c, 0, sizeof(*c));
2840 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2841 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2842 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2843 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2844 c->sadb_comb_hard_addtime = 24*60*60;
2845 c->sadb_comb_soft_addtime = 20*60*60;
2846 c->sadb_comb_hard_usetime = 8*60*60;
2847 c->sadb_comb_soft_usetime = 7*60*60;
2848 }
2849 }
2850 }
2851
2852 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2853 {
2854 struct sadb_prop *p;
2855 int i, k;
2856
2857 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2858 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2859 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2860 p->sadb_prop_replay = 32;
2861 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2862
2863 for (i=0; ; i++) {
2864 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2865 if (!ealg)
2866 break;
2867
2868 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2869 continue;
2870
2871 for (k = 1; ; k++) {
2872 struct sadb_comb *c;
2873 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2874 if (!aalg)
2875 break;
2876 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2877 continue;
2878 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2879 memset(c, 0, sizeof(*c));
2880 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2881 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2882 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2883 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2884 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2885 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2886 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2887 c->sadb_comb_hard_addtime = 24*60*60;
2888 c->sadb_comb_soft_addtime = 20*60*60;
2889 c->sadb_comb_hard_usetime = 8*60*60;
2890 c->sadb_comb_soft_usetime = 7*60*60;
2891 }
2892 }
2893 }
2894
2895 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2896 {
2897 return 0;
2898 }
2899
2900 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2901 {
2902 struct sk_buff *out_skb;
2903 struct sadb_msg *out_hdr;
2904 int hard;
2905 int hsc;
2906
2907 hard = c->data.hard;
2908 if (hard)
2909 hsc = 2;
2910 else
2911 hsc = 1;
2912
2913 out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
2914 if (IS_ERR(out_skb))
2915 return PTR_ERR(out_skb);
2916
2917 out_hdr = (struct sadb_msg *) out_skb->data;
2918 out_hdr->sadb_msg_version = PF_KEY_V2;
2919 out_hdr->sadb_msg_type = SADB_EXPIRE;
2920 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2921 out_hdr->sadb_msg_errno = 0;
2922 out_hdr->sadb_msg_reserved = 0;
2923 out_hdr->sadb_msg_seq = 0;
2924 out_hdr->sadb_msg_pid = 0;
2925
2926 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2927 return 0;
2928 }
2929
2930 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2931 {
2932 switch (c->event) {
2933 case XFRM_MSG_EXPIRE:
2934 return key_notify_sa_expire(x, c);
2935 case XFRM_MSG_DELSA:
2936 case XFRM_MSG_NEWSA:
2937 case XFRM_MSG_UPDSA:
2938 return key_notify_sa(x, c);
2939 case XFRM_MSG_FLUSHSA:
2940 return key_notify_sa_flush(c);
2941 case XFRM_MSG_NEWAE: /* not yet supported */
2942 break;
2943 default:
2944 printk("pfkey: Unknown SA event %d\n", c->event);
2945 break;
2946 }
2947
2948 return 0;
2949 }
2950
2951 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2952 {
2953 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2954 return 0;
2955
2956 switch (c->event) {
2957 case XFRM_MSG_POLEXPIRE:
2958 return key_notify_policy_expire(xp, c);
2959 case XFRM_MSG_DELPOLICY:
2960 case XFRM_MSG_NEWPOLICY:
2961 case XFRM_MSG_UPDPOLICY:
2962 return key_notify_policy(xp, dir, c);
2963 case XFRM_MSG_FLUSHPOLICY:
2964 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2965 break;
2966 return key_notify_policy_flush(c);
2967 default:
2968 printk("pfkey: Unknown policy event %d\n", c->event);
2969 break;
2970 }
2971
2972 return 0;
2973 }
2974
2975 static u32 get_acqseq(void)
2976 {
2977 u32 res;
2978 static u32 acqseq;
2979 static DEFINE_SPINLOCK(acqseq_lock);
2980
2981 spin_lock_bh(&acqseq_lock);
2982 res = (++acqseq ? : ++acqseq);
2983 spin_unlock_bh(&acqseq_lock);
2984 return res;
2985 }
2986
2987 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
2988 {
2989 struct sk_buff *skb;
2990 struct sadb_msg *hdr;
2991 struct sadb_address *addr;
2992 struct sadb_x_policy *pol;
2993 struct sockaddr_in *sin;
2994 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2995 struct sockaddr_in6 *sin6;
2996 #endif
2997 int sockaddr_size;
2998 int size;
2999 struct sadb_x_sec_ctx *sec_ctx;
3000 struct xfrm_sec_ctx *xfrm_ctx;
3001 int ctx_size = 0;
3002
3003 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3004 if (!sockaddr_size)
3005 return -EINVAL;
3006
3007 size = sizeof(struct sadb_msg) +
3008 (sizeof(struct sadb_address) * 2) +
3009 (sockaddr_size * 2) +
3010 sizeof(struct sadb_x_policy);
3011
3012 if (x->id.proto == IPPROTO_AH)
3013 size += count_ah_combs(t);
3014 else if (x->id.proto == IPPROTO_ESP)
3015 size += count_esp_combs(t);
3016
3017 if ((xfrm_ctx = x->security)) {
3018 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3019 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3020 }
3021
3022 skb = alloc_skb(size + 16, GFP_ATOMIC);
3023 if (skb == NULL)
3024 return -ENOMEM;
3025
3026 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3027 hdr->sadb_msg_version = PF_KEY_V2;
3028 hdr->sadb_msg_type = SADB_ACQUIRE;
3029 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3030 hdr->sadb_msg_len = size / sizeof(uint64_t);
3031 hdr->sadb_msg_errno = 0;
3032 hdr->sadb_msg_reserved = 0;
3033 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3034 hdr->sadb_msg_pid = 0;
3035
3036 /* src address */
3037 addr = (struct sadb_address*) skb_put(skb,
3038 sizeof(struct sadb_address)+sockaddr_size);
3039 addr->sadb_address_len =
3040 (sizeof(struct sadb_address)+sockaddr_size)/
3041 sizeof(uint64_t);
3042 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3043 addr->sadb_address_proto = 0;
3044 addr->sadb_address_reserved = 0;
3045 if (x->props.family == AF_INET) {
3046 addr->sadb_address_prefixlen = 32;
3047
3048 sin = (struct sockaddr_in *) (addr + 1);
3049 sin->sin_family = AF_INET;
3050 sin->sin_addr.s_addr = x->props.saddr.a4;
3051 sin->sin_port = 0;
3052 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3053 }
3054 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3055 else if (x->props.family == AF_INET6) {
3056 addr->sadb_address_prefixlen = 128;
3057
3058 sin6 = (struct sockaddr_in6 *) (addr + 1);
3059 sin6->sin6_family = AF_INET6;
3060 sin6->sin6_port = 0;
3061 sin6->sin6_flowinfo = 0;
3062 memcpy(&sin6->sin6_addr,
3063 x->props.saddr.a6, sizeof(struct in6_addr));
3064 sin6->sin6_scope_id = 0;
3065 }
3066 #endif
3067 else
3068 BUG();
3069
3070 /* dst address */
3071 addr = (struct sadb_address*) skb_put(skb,
3072 sizeof(struct sadb_address)+sockaddr_size);
3073 addr->sadb_address_len =
3074 (sizeof(struct sadb_address)+sockaddr_size)/
3075 sizeof(uint64_t);
3076 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3077 addr->sadb_address_proto = 0;
3078 addr->sadb_address_reserved = 0;
3079 if (x->props.family == AF_INET) {
3080 addr->sadb_address_prefixlen = 32;
3081
3082 sin = (struct sockaddr_in *) (addr + 1);
3083 sin->sin_family = AF_INET;
3084 sin->sin_addr.s_addr = x->id.daddr.a4;
3085 sin->sin_port = 0;
3086 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3087 }
3088 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3089 else if (x->props.family == AF_INET6) {
3090 addr->sadb_address_prefixlen = 128;
3091
3092 sin6 = (struct sockaddr_in6 *) (addr + 1);
3093 sin6->sin6_family = AF_INET6;
3094 sin6->sin6_port = 0;
3095 sin6->sin6_flowinfo = 0;
3096 memcpy(&sin6->sin6_addr,
3097 x->id.daddr.a6, sizeof(struct in6_addr));
3098 sin6->sin6_scope_id = 0;
3099 }
3100 #endif
3101 else
3102 BUG();
3103
3104 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3105 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3106 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3107 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3108 pol->sadb_x_policy_dir = dir+1;
3109 pol->sadb_x_policy_id = xp->index;
3110
3111 /* Set sadb_comb's. */
3112 if (x->id.proto == IPPROTO_AH)
3113 dump_ah_combs(skb, t);
3114 else if (x->id.proto == IPPROTO_ESP)
3115 dump_esp_combs(skb, t);
3116
3117 /* security context */
3118 if (xfrm_ctx) {
3119 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3120 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3121 sec_ctx->sadb_x_sec_len =
3122 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3123 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3124 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3125 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3126 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3127 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3128 xfrm_ctx->ctx_len);
3129 }
3130
3131 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3132 }
3133
3134 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3135 u8 *data, int len, int *dir)
3136 {
3137 struct xfrm_policy *xp;
3138 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3139 struct sadb_x_sec_ctx *sec_ctx;
3140
3141 switch (sk->sk_family) {
3142 case AF_INET:
3143 if (opt != IP_IPSEC_POLICY) {
3144 *dir = -EOPNOTSUPP;
3145 return NULL;
3146 }
3147 break;
3148 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3149 case AF_INET6:
3150 if (opt != IPV6_IPSEC_POLICY) {
3151 *dir = -EOPNOTSUPP;
3152 return NULL;
3153 }
3154 break;
3155 #endif
3156 default:
3157 *dir = -EINVAL;
3158 return NULL;
3159 }
3160
3161 *dir = -EINVAL;
3162
3163 if (len < sizeof(struct sadb_x_policy) ||
3164 pol->sadb_x_policy_len*8 > len ||
3165 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3166 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3167 return NULL;
3168
3169 xp = xfrm_policy_alloc(GFP_ATOMIC);
3170 if (xp == NULL) {
3171 *dir = -ENOBUFS;
3172 return NULL;
3173 }
3174
3175 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3176 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3177
3178 xp->lft.soft_byte_limit = XFRM_INF;
3179 xp->lft.hard_byte_limit = XFRM_INF;
3180 xp->lft.soft_packet_limit = XFRM_INF;
3181 xp->lft.hard_packet_limit = XFRM_INF;
3182 xp->family = sk->sk_family;
3183
3184 xp->xfrm_nr = 0;
3185 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3186 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3187 goto out;
3188
3189 /* security context too */
3190 if (len >= (pol->sadb_x_policy_len*8 +
3191 sizeof(struct sadb_x_sec_ctx))) {
3192 char *p = (char *)pol;
3193 struct xfrm_user_sec_ctx *uctx;
3194
3195 p += pol->sadb_x_policy_len*8;
3196 sec_ctx = (struct sadb_x_sec_ctx *)p;
3197 if (len < pol->sadb_x_policy_len*8 +
3198 sec_ctx->sadb_x_sec_len) {
3199 *dir = -EINVAL;
3200 goto out;
3201 }
3202 if ((*dir = verify_sec_ctx_len(p)))
3203 goto out;
3204 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3205 *dir = security_xfrm_policy_alloc(xp, uctx);
3206 kfree(uctx);
3207
3208 if (*dir)
3209 goto out;
3210 }
3211
3212 *dir = pol->sadb_x_policy_dir-1;
3213 return xp;
3214
3215 out:
3216 security_xfrm_policy_free(xp);
3217 kfree(xp);
3218 return NULL;
3219 }
3220
3221 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3222 {
3223 struct sk_buff *skb;
3224 struct sadb_msg *hdr;
3225 struct sadb_sa *sa;
3226 struct sadb_address *addr;
3227 struct sadb_x_nat_t_port *n_port;
3228 struct sockaddr_in *sin;
3229 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3230 struct sockaddr_in6 *sin6;
3231 #endif
3232 int sockaddr_size;
3233 int size;
3234 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3235 struct xfrm_encap_tmpl *natt = NULL;
3236
3237 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3238 if (!sockaddr_size)
3239 return -EINVAL;
3240
3241 if (!satype)
3242 return -EINVAL;
3243
3244 if (!x->encap)
3245 return -EINVAL;
3246
3247 natt = x->encap;
3248
3249 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3250 *
3251 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3252 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3253 */
3254
3255 size = sizeof(struct sadb_msg) +
3256 sizeof(struct sadb_sa) +
3257 (sizeof(struct sadb_address) * 2) +
3258 (sockaddr_size * 2) +
3259 (sizeof(struct sadb_x_nat_t_port) * 2);
3260
3261 skb = alloc_skb(size + 16, GFP_ATOMIC);
3262 if (skb == NULL)
3263 return -ENOMEM;
3264
3265 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3266 hdr->sadb_msg_version = PF_KEY_V2;
3267 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3268 hdr->sadb_msg_satype = satype;
3269 hdr->sadb_msg_len = size / sizeof(uint64_t);
3270 hdr->sadb_msg_errno = 0;
3271 hdr->sadb_msg_reserved = 0;
3272 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3273 hdr->sadb_msg_pid = 0;
3274
3275 /* SA */
3276 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3277 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3278 sa->sadb_sa_exttype = SADB_EXT_SA;
3279 sa->sadb_sa_spi = x->id.spi;
3280 sa->sadb_sa_replay = 0;
3281 sa->sadb_sa_state = 0;
3282 sa->sadb_sa_auth = 0;
3283 sa->sadb_sa_encrypt = 0;
3284 sa->sadb_sa_flags = 0;
3285
3286 /* ADDRESS_SRC (old addr) */
3287 addr = (struct sadb_address*)
3288 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3289 addr->sadb_address_len =
3290 (sizeof(struct sadb_address)+sockaddr_size)/
3291 sizeof(uint64_t);
3292 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3293 addr->sadb_address_proto = 0;
3294 addr->sadb_address_reserved = 0;
3295 if (x->props.family == AF_INET) {
3296 addr->sadb_address_prefixlen = 32;
3297
3298 sin = (struct sockaddr_in *) (addr + 1);
3299 sin->sin_family = AF_INET;
3300 sin->sin_addr.s_addr = x->props.saddr.a4;
3301 sin->sin_port = 0;
3302 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3303 }
3304 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3305 else if (x->props.family == AF_INET6) {
3306 addr->sadb_address_prefixlen = 128;
3307
3308 sin6 = (struct sockaddr_in6 *) (addr + 1);
3309 sin6->sin6_family = AF_INET6;
3310 sin6->sin6_port = 0;
3311 sin6->sin6_flowinfo = 0;
3312 memcpy(&sin6->sin6_addr,
3313 x->props.saddr.a6, sizeof(struct in6_addr));
3314 sin6->sin6_scope_id = 0;
3315 }
3316 #endif
3317 else
3318 BUG();
3319
3320 /* NAT_T_SPORT (old port) */
3321 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3322 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3323 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3324 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3325 n_port->sadb_x_nat_t_port_reserved = 0;
3326
3327 /* ADDRESS_DST (new addr) */
3328 addr = (struct sadb_address*)
3329 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3330 addr->sadb_address_len =
3331 (sizeof(struct sadb_address)+sockaddr_size)/
3332 sizeof(uint64_t);
3333 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3334 addr->sadb_address_proto = 0;
3335 addr->sadb_address_reserved = 0;
3336 if (x->props.family == AF_INET) {
3337 addr->sadb_address_prefixlen = 32;
3338
3339 sin = (struct sockaddr_in *) (addr + 1);
3340 sin->sin_family = AF_INET;
3341 sin->sin_addr.s_addr = ipaddr->a4;
3342 sin->sin_port = 0;
3343 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3344 }
3345 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3346 else if (x->props.family == AF_INET6) {
3347 addr->sadb_address_prefixlen = 128;
3348
3349 sin6 = (struct sockaddr_in6 *) (addr + 1);
3350 sin6->sin6_family = AF_INET6;
3351 sin6->sin6_port = 0;
3352 sin6->sin6_flowinfo = 0;
3353 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3354 sin6->sin6_scope_id = 0;
3355 }
3356 #endif
3357 else
3358 BUG();
3359
3360 /* NAT_T_DPORT (new port) */
3361 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3362 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3363 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3364 n_port->sadb_x_nat_t_port_port = sport;
3365 n_port->sadb_x_nat_t_port_reserved = 0;
3366
3367 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3368 }
3369
3370 #ifdef CONFIG_NET_KEY_MIGRATE
3371 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3372 struct xfrm_selector *sel)
3373 {
3374 struct sadb_address *addr;
3375 struct sockaddr_in *sin;
3376 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3377 struct sockaddr_in6 *sin6;
3378 #endif
3379 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3380 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3381 addr->sadb_address_exttype = type;
3382 addr->sadb_address_proto = sel->proto;
3383 addr->sadb_address_reserved = 0;
3384
3385 switch (type) {
3386 case SADB_EXT_ADDRESS_SRC:
3387 if (sel->family == AF_INET) {
3388 addr->sadb_address_prefixlen = sel->prefixlen_s;
3389 sin = (struct sockaddr_in *)(addr + 1);
3390 sin->sin_family = AF_INET;
3391 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3392 sizeof(sin->sin_addr.s_addr));
3393 sin->sin_port = 0;
3394 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3395 }
3396 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3397 else if (sel->family == AF_INET6) {
3398 addr->sadb_address_prefixlen = sel->prefixlen_s;
3399 sin6 = (struct sockaddr_in6 *)(addr + 1);
3400 sin6->sin6_family = AF_INET6;
3401 sin6->sin6_port = 0;
3402 sin6->sin6_flowinfo = 0;
3403 sin6->sin6_scope_id = 0;
3404 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3405 sizeof(sin6->sin6_addr.s6_addr));
3406 }
3407 #endif
3408 break;
3409 case SADB_EXT_ADDRESS_DST:
3410 if (sel->family == AF_INET) {
3411 addr->sadb_address_prefixlen = sel->prefixlen_d;
3412 sin = (struct sockaddr_in *)(addr + 1);
3413 sin->sin_family = AF_INET;
3414 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3415 sizeof(sin->sin_addr.s_addr));
3416 sin->sin_port = 0;
3417 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3418 }
3419 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3420 else if (sel->family == AF_INET6) {
3421 addr->sadb_address_prefixlen = sel->prefixlen_d;
3422 sin6 = (struct sockaddr_in6 *)(addr + 1);
3423 sin6->sin6_family = AF_INET6;
3424 sin6->sin6_port = 0;
3425 sin6->sin6_flowinfo = 0;
3426 sin6->sin6_scope_id = 0;
3427 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3428 sizeof(sin6->sin6_addr.s6_addr));
3429 }
3430 #endif
3431 break;
3432 default:
3433 return -EINVAL;
3434 }
3435
3436 return 0;
3437 }
3438
3439 static int set_ipsecrequest(struct sk_buff *skb,
3440 uint8_t proto, uint8_t mode, int level,
3441 uint32_t reqid, uint8_t family,
3442 xfrm_address_t *src, xfrm_address_t *dst)
3443 {
3444 struct sadb_x_ipsecrequest *rq;
3445 struct sockaddr_in *sin;
3446 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3447 struct sockaddr_in6 *sin6;
3448 #endif
3449 int size_req;
3450
3451 size_req = sizeof(struct sadb_x_ipsecrequest) +
3452 pfkey_sockaddr_pair_size(family);
3453
3454 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3455 memset(rq, 0, size_req);
3456 rq->sadb_x_ipsecrequest_len = size_req;
3457 rq->sadb_x_ipsecrequest_proto = proto;
3458 rq->sadb_x_ipsecrequest_mode = mode;
3459 rq->sadb_x_ipsecrequest_level = level;
3460 rq->sadb_x_ipsecrequest_reqid = reqid;
3461
3462 switch (family) {
3463 case AF_INET:
3464 sin = (struct sockaddr_in *)(rq + 1);
3465 sin->sin_family = AF_INET;
3466 memcpy(&sin->sin_addr.s_addr, src,
3467 sizeof(sin->sin_addr.s_addr));
3468 sin++;
3469 sin->sin_family = AF_INET;
3470 memcpy(&sin->sin_addr.s_addr, dst,
3471 sizeof(sin->sin_addr.s_addr));
3472 break;
3473 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3474 case AF_INET6:
3475 sin6 = (struct sockaddr_in6 *)(rq + 1);
3476 sin6->sin6_family = AF_INET6;
3477 sin6->sin6_port = 0;
3478 sin6->sin6_flowinfo = 0;
3479 sin6->sin6_scope_id = 0;
3480 memcpy(&sin6->sin6_addr.s6_addr, src,
3481 sizeof(sin6->sin6_addr.s6_addr));
3482 sin6++;
3483 sin6->sin6_family = AF_INET6;
3484 sin6->sin6_port = 0;
3485 sin6->sin6_flowinfo = 0;
3486 sin6->sin6_scope_id = 0;
3487 memcpy(&sin6->sin6_addr.s6_addr, dst,
3488 sizeof(sin6->sin6_addr.s6_addr));
3489 break;
3490 #endif
3491 default:
3492 return -EINVAL;
3493 }
3494
3495 return 0;
3496 }
3497 #endif
3498
3499 #ifdef CONFIG_NET_KEY_MIGRATE
3500 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3501 struct xfrm_migrate *m, int num_bundles)
3502 {
3503 int i;
3504 int sasize_sel;
3505 int size = 0;
3506 int size_pol = 0;
3507 struct sk_buff *skb;
3508 struct sadb_msg *hdr;
3509 struct sadb_x_policy *pol;
3510 struct xfrm_migrate *mp;
3511
3512 if (type != XFRM_POLICY_TYPE_MAIN)
3513 return 0;
3514
3515 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3516 return -EINVAL;
3517
3518 /* selector */
3519 sasize_sel = pfkey_sockaddr_size(sel->family);
3520 if (!sasize_sel)
3521 return -EINVAL;
3522 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3523
3524 /* policy info */
3525 size_pol += sizeof(struct sadb_x_policy);
3526
3527 /* ipsecrequests */
3528 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3529 /* old locator pair */
3530 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3531 pfkey_sockaddr_pair_size(mp->old_family);
3532 /* new locator pair */
3533 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3534 pfkey_sockaddr_pair_size(mp->new_family);
3535 }
3536
3537 size += sizeof(struct sadb_msg) + size_pol;
3538
3539 /* alloc buffer */
3540 skb = alloc_skb(size, GFP_ATOMIC);
3541 if (skb == NULL)
3542 return -ENOMEM;
3543
3544 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3545 hdr->sadb_msg_version = PF_KEY_V2;
3546 hdr->sadb_msg_type = SADB_X_MIGRATE;
3547 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3548 hdr->sadb_msg_len = size / 8;
3549 hdr->sadb_msg_errno = 0;
3550 hdr->sadb_msg_reserved = 0;
3551 hdr->sadb_msg_seq = 0;
3552 hdr->sadb_msg_pid = 0;
3553
3554 /* selector src */
3555 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3556
3557 /* selector dst */
3558 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3559
3560 /* policy information */
3561 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3562 pol->sadb_x_policy_len = size_pol / 8;
3563 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3564 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3565 pol->sadb_x_policy_dir = dir + 1;
3566 pol->sadb_x_policy_id = 0;
3567 pol->sadb_x_policy_priority = 0;
3568
3569 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3570 /* old ipsecrequest */
3571 int mode = pfkey_mode_from_xfrm(mp->mode);
3572 if (mode < 0)
3573 return -EINVAL;
3574 if (set_ipsecrequest(skb, mp->proto, mode,
3575 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3576 mp->reqid, mp->old_family,
3577 &mp->old_saddr, &mp->old_daddr) < 0) {
3578 return -EINVAL;
3579 }
3580
3581 /* new ipsecrequest */
3582 if (set_ipsecrequest(skb, mp->proto, mode,
3583 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3584 mp->reqid, mp->new_family,
3585 &mp->new_saddr, &mp->new_daddr) < 0) {
3586 return -EINVAL;
3587 }
3588 }
3589
3590 /* broadcast migrate message to sockets */
3591 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3592
3593 return 0;
3594 }
3595 #else
3596 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3597 struct xfrm_migrate *m, int num_bundles)
3598 {
3599 return -ENOPROTOOPT;
3600 }
3601 #endif
3602
3603 static int pfkey_sendmsg(struct kiocb *kiocb,
3604 struct socket *sock, struct msghdr *msg, size_t len)
3605 {
3606 struct sock *sk = sock->sk;
3607 struct sk_buff *skb = NULL;
3608 struct sadb_msg *hdr = NULL;
3609 int err;
3610
3611 err = -EOPNOTSUPP;
3612 if (msg->msg_flags & MSG_OOB)
3613 goto out;
3614
3615 err = -EMSGSIZE;
3616 if ((unsigned)len > sk->sk_sndbuf - 32)
3617 goto out;
3618
3619 err = -ENOBUFS;
3620 skb = alloc_skb(len, GFP_KERNEL);
3621 if (skb == NULL)
3622 goto out;
3623
3624 err = -EFAULT;
3625 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3626 goto out;
3627
3628 hdr = pfkey_get_base_msg(skb, &err);
3629 if (!hdr)
3630 goto out;
3631
3632 mutex_lock(&xfrm_cfg_mutex);
3633 err = pfkey_process(sk, skb, hdr);
3634 mutex_unlock(&xfrm_cfg_mutex);
3635
3636 out:
3637 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3638 err = 0;
3639 if (skb)
3640 kfree_skb(skb);
3641
3642 return err ? : len;
3643 }
3644
3645 static int pfkey_recvmsg(struct kiocb *kiocb,
3646 struct socket *sock, struct msghdr *msg, size_t len,
3647 int flags)
3648 {
3649 struct sock *sk = sock->sk;
3650 struct sk_buff *skb;
3651 int copied, err;
3652
3653 err = -EINVAL;
3654 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3655 goto out;
3656
3657 msg->msg_namelen = 0;
3658 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3659 if (skb == NULL)
3660 goto out;
3661
3662 copied = skb->len;
3663 if (copied > len) {
3664 msg->msg_flags |= MSG_TRUNC;
3665 copied = len;
3666 }
3667
3668 skb_reset_transport_header(skb);
3669 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3670 if (err)
3671 goto out_free;
3672
3673 sock_recv_timestamp(msg, sk, skb);
3674
3675 err = (flags & MSG_TRUNC) ? skb->len : copied;
3676
3677 out_free:
3678 skb_free_datagram(sk, skb);
3679 out:
3680 return err;
3681 }
3682
3683 static const struct proto_ops pfkey_ops = {
3684 .family = PF_KEY,
3685 .owner = THIS_MODULE,
3686 /* Operations that make no sense on pfkey sockets. */
3687 .bind = sock_no_bind,
3688 .connect = sock_no_connect,
3689 .socketpair = sock_no_socketpair,
3690 .accept = sock_no_accept,
3691 .getname = sock_no_getname,
3692 .ioctl = sock_no_ioctl,
3693 .listen = sock_no_listen,
3694 .shutdown = sock_no_shutdown,
3695 .setsockopt = sock_no_setsockopt,
3696 .getsockopt = sock_no_getsockopt,
3697 .mmap = sock_no_mmap,
3698 .sendpage = sock_no_sendpage,
3699
3700 /* Now the operations that really occur. */
3701 .release = pfkey_release,
3702 .poll = datagram_poll,
3703 .sendmsg = pfkey_sendmsg,
3704 .recvmsg = pfkey_recvmsg,
3705 };
3706
3707 static struct net_proto_family pfkey_family_ops = {
3708 .family = PF_KEY,
3709 .create = pfkey_create,
3710 .owner = THIS_MODULE,
3711 };
3712
3713 #ifdef CONFIG_PROC_FS
3714 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3715 int length, int *eof, void *data)
3716 {
3717 off_t pos = 0;
3718 off_t begin = 0;
3719 int len = 0;
3720 struct sock *s;
3721 struct hlist_node *node;
3722
3723 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3724
3725 read_lock(&pfkey_table_lock);
3726
3727 sk_for_each(s, node, &pfkey_table) {
3728 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3729 s,
3730 atomic_read(&s->sk_refcnt),
3731 atomic_read(&s->sk_rmem_alloc),
3732 atomic_read(&s->sk_wmem_alloc),
3733 sock_i_uid(s),
3734 sock_i_ino(s)
3735 );
3736
3737 buffer[len++] = '\n';
3738
3739 pos = begin + len;
3740 if (pos < offset) {
3741 len = 0;
3742 begin = pos;
3743 }
3744 if(pos > offset + length)
3745 goto done;
3746 }
3747 *eof = 1;
3748
3749 done:
3750 read_unlock(&pfkey_table_lock);
3751
3752 *start = buffer + (offset - begin);
3753 len -= (offset - begin);
3754
3755 if (len > length)
3756 len = length;
3757 if (len < 0)
3758 len = 0;
3759
3760 return len;
3761 }
3762 #endif
3763
3764 static struct xfrm_mgr pfkeyv2_mgr =
3765 {
3766 .id = "pfkeyv2",
3767 .notify = pfkey_send_notify,
3768 .acquire = pfkey_send_acquire,
3769 .compile_policy = pfkey_compile_policy,
3770 .new_mapping = pfkey_send_new_mapping,
3771 .notify_policy = pfkey_send_policy_notify,
3772 .migrate = pfkey_send_migrate,
3773 };
3774
3775 static void __exit ipsec_pfkey_exit(void)
3776 {
3777 xfrm_unregister_km(&pfkeyv2_mgr);
3778 remove_proc_entry("net/pfkey", NULL);
3779 sock_unregister(PF_KEY);
3780 proto_unregister(&key_proto);
3781 }
3782
3783 static int __init ipsec_pfkey_init(void)
3784 {
3785 int err = proto_register(&key_proto, 0);
3786
3787 if (err != 0)
3788 goto out;
3789
3790 err = sock_register(&pfkey_family_ops);
3791 if (err != 0)
3792 goto out_unregister_key_proto;
3793 #ifdef CONFIG_PROC_FS
3794 err = -ENOMEM;
3795 if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
3796 goto out_sock_unregister;
3797 #endif
3798 err = xfrm_register_km(&pfkeyv2_mgr);
3799 if (err != 0)
3800 goto out_remove_proc_entry;
3801 out:
3802 return err;
3803 out_remove_proc_entry:
3804 #ifdef CONFIG_PROC_FS
3805 remove_proc_entry("net/pfkey", NULL);
3806 out_sock_unregister:
3807 #endif
3808 sock_unregister(PF_KEY);
3809 out_unregister_key_proto:
3810 proto_unregister(&key_proto);
3811 goto out;
3812 }
3813
3814 module_init(ipsec_pfkey_init);
3815 module_exit(ipsec_pfkey_exit);
3816 MODULE_LICENSE("GPL");
3817 MODULE_ALIAS_NETPROTO(PF_KEY);
Linux 2.6 libata-dev (mirror)