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sched: remove precise CPU load
[linux-2.6/kmemtrace.git] / net / key / af_key.c
blob7969f8a716df6063dbaaeebad90630b6cd6472cd
1 /*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
17 #include <linux/capability.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/socket.h>
21 #include <linux/pfkeyv2.h>
22 #include <linux/ipsec.h>
23 #include <linux/skbuff.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/in.h>
26 #include <linux/in6.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <net/net_namespace.h>
30 #include <net/xfrm.h>
31
32 #include <net/sock.h>
33
34 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
36
37
38 /* List of all pfkey sockets. */
39 static HLIST_HEAD(pfkey_table);
40 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41 static DEFINE_RWLOCK(pfkey_table_lock);
42 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43
44 static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
45
46 struct pfkey_sock {
47 /* struct sock must be the first member of struct pfkey_sock */
48 struct sock sk;
49 int registered;
50 int promisc;
51 };
52
53 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54 {
55 return (struct pfkey_sock *)sk;
56 }
57
58 static void pfkey_sock_destruct(struct sock *sk)
59 {
60 skb_queue_purge(&sk->sk_receive_queue);
61
62 if (!sock_flag(sk, SOCK_DEAD)) {
63 printk("Attempt to release alive pfkey socket: %p\n", sk);
64 return;
65 }
66
67 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69
70 atomic_dec(&pfkey_socks_nr);
71 }
72
73 static void pfkey_table_grab(void)
74 {
75 write_lock_bh(&pfkey_table_lock);
76
77 if (atomic_read(&pfkey_table_users)) {
78 DECLARE_WAITQUEUE(wait, current);
79
80 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81 for(;;) {
82 set_current_state(TASK_UNINTERRUPTIBLE);
83 if (atomic_read(&pfkey_table_users) == 0)
84 break;
85 write_unlock_bh(&pfkey_table_lock);
86 schedule();
87 write_lock_bh(&pfkey_table_lock);
88 }
89
90 __set_current_state(TASK_RUNNING);
91 remove_wait_queue(&pfkey_table_wait, &wait);
92 }
93 }
94
95 static __inline__ void pfkey_table_ungrab(void)
96 {
97 write_unlock_bh(&pfkey_table_lock);
98 wake_up(&pfkey_table_wait);
99 }
100
101 static __inline__ void pfkey_lock_table(void)
102 {
103 /* read_lock() synchronizes us to pfkey_table_grab */
104
105 read_lock(&pfkey_table_lock);
106 atomic_inc(&pfkey_table_users);
107 read_unlock(&pfkey_table_lock);
108 }
109
110 static __inline__ void pfkey_unlock_table(void)
111 {
112 if (atomic_dec_and_test(&pfkey_table_users))
113 wake_up(&pfkey_table_wait);
114 }
115
116
117 static const struct proto_ops pfkey_ops;
118
119 static void pfkey_insert(struct sock *sk)
120 {
121 pfkey_table_grab();
122 sk_add_node(sk, &pfkey_table);
123 pfkey_table_ungrab();
124 }
125
126 static void pfkey_remove(struct sock *sk)
127 {
128 pfkey_table_grab();
129 sk_del_node_init(sk);
130 pfkey_table_ungrab();
131 }
132
133 static struct proto key_proto = {
134 .name = "KEY",
135 .owner = THIS_MODULE,
136 .obj_size = sizeof(struct pfkey_sock),
137 };
138
139 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
140 {
141 struct sock *sk;
142 int err;
143
144 if (net != &init_net)
145 return -EAFNOSUPPORT;
146
147 if (!capable(CAP_NET_ADMIN))
148 return -EPERM;
149 if (sock->type != SOCK_RAW)
150 return -ESOCKTNOSUPPORT;
151 if (protocol != PF_KEY_V2)
152 return -EPROTONOSUPPORT;
153
154 err = -ENOMEM;
155 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, 1);
156 if (sk == NULL)
157 goto out;
158
159 sock->ops = &pfkey_ops;
160 sock_init_data(sock, sk);
161
162 sk->sk_family = PF_KEY;
163 sk->sk_destruct = pfkey_sock_destruct;
164
165 atomic_inc(&pfkey_socks_nr);
166
167 pfkey_insert(sk);
168
169 return 0;
170 out:
171 return err;
172 }
173
174 static int pfkey_release(struct socket *sock)
175 {
176 struct sock *sk = sock->sk;
177
178 if (!sk)
179 return 0;
180
181 pfkey_remove(sk);
182
183 sock_orphan(sk);
184 sock->sk = NULL;
185 skb_queue_purge(&sk->sk_write_queue);
186 sock_put(sk);
187
188 return 0;
189 }
190
191 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
192 gfp_t allocation, struct sock *sk)
193 {
194 int err = -ENOBUFS;
195
196 sock_hold(sk);
197 if (*skb2 == NULL) {
198 if (atomic_read(&skb->users) != 1) {
199 *skb2 = skb_clone(skb, allocation);
200 } else {
201 *skb2 = skb;
202 atomic_inc(&skb->users);
203 }
204 }
205 if (*skb2 != NULL) {
206 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
207 skb_orphan(*skb2);
208 skb_set_owner_r(*skb2, sk);
209 skb_queue_tail(&sk->sk_receive_queue, *skb2);
210 sk->sk_data_ready(sk, (*skb2)->len);
211 *skb2 = NULL;
212 err = 0;
213 }
214 }
215 sock_put(sk);
216 return err;
217 }
218
219 /* Send SKB to all pfkey sockets matching selected criteria. */
220 #define BROADCAST_ALL 0
221 #define BROADCAST_ONE 1
222 #define BROADCAST_REGISTERED 2
223 #define BROADCAST_PROMISC_ONLY 4
224 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
225 int broadcast_flags, struct sock *one_sk)
226 {
227 struct sock *sk;
228 struct hlist_node *node;
229 struct sk_buff *skb2 = NULL;
230 int err = -ESRCH;
231
232 /* XXX Do we need something like netlink_overrun? I think
233 * XXX PF_KEY socket apps will not mind current behavior.
234 */
235 if (!skb)
236 return -ENOMEM;
237
238 pfkey_lock_table();
239 sk_for_each(sk, node, &pfkey_table) {
240 struct pfkey_sock *pfk = pfkey_sk(sk);
241 int err2;
242
243 /* Yes, it means that if you are meant to receive this
244 * pfkey message you receive it twice as promiscuous
245 * socket.
246 */
247 if (pfk->promisc)
248 pfkey_broadcast_one(skb, &skb2, allocation, sk);
249
250 /* the exact target will be processed later */
251 if (sk == one_sk)
252 continue;
253 if (broadcast_flags != BROADCAST_ALL) {
254 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
255 continue;
256 if ((broadcast_flags & BROADCAST_REGISTERED) &&
257 !pfk->registered)
258 continue;
259 if (broadcast_flags & BROADCAST_ONE)
260 continue;
261 }
262
263 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
264
265 /* Error is cleare after succecful sending to at least one
266 * registered KM */
267 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
268 err = err2;
269 }
270 pfkey_unlock_table();
271
272 if (one_sk != NULL)
273 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
274
275 if (skb2)
276 kfree_skb(skb2);
277 kfree_skb(skb);
278 return err;
279 }
280
281 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
282 {
283 *new = *orig;
284 }
285
286 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
287 {
288 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
289 struct sadb_msg *hdr;
290
291 if (!skb)
292 return -ENOBUFS;
293
294 /* Woe be to the platform trying to support PFKEY yet
295 * having normal errnos outside the 1-255 range, inclusive.
296 */
297 err = -err;
298 if (err == ERESTARTSYS ||
299 err == ERESTARTNOHAND ||
300 err == ERESTARTNOINTR)
301 err = EINTR;
302 if (err >= 512)
303 err = EINVAL;
304 BUG_ON(err <= 0 || err >= 256);
305
306 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
307 pfkey_hdr_dup(hdr, orig);
308 hdr->sadb_msg_errno = (uint8_t) err;
309 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
310 sizeof(uint64_t));
311
312 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
313
314 return 0;
315 }
316
317 static u8 sadb_ext_min_len[] = {
318 [SADB_EXT_RESERVED] = (u8) 0,
319 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
320 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
321 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
322 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
323 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
324 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
325 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
326 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
327 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
328 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
329 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
330 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
331 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
332 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
333 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
334 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
335 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
336 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
337 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
338 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
339 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
340 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
341 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
342 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
343 };
344
345 /* Verify sadb_address_{len,prefixlen} against sa_family. */
346 static int verify_address_len(void *p)
347 {
348 struct sadb_address *sp = p;
349 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
350 struct sockaddr_in *sin;
351 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
352 struct sockaddr_in6 *sin6;
353 #endif
354 int len;
355
356 switch (addr->sa_family) {
357 case AF_INET:
358 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
359 if (sp->sadb_address_len != len ||
360 sp->sadb_address_prefixlen > 32)
361 return -EINVAL;
362 break;
363 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
364 case AF_INET6:
365 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
366 if (sp->sadb_address_len != len ||
367 sp->sadb_address_prefixlen > 128)
368 return -EINVAL;
369 break;
370 #endif
371 default:
372 /* It is user using kernel to keep track of security
373 * associations for another protocol, such as
374 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
375 * lengths.
376 *
377 * XXX Actually, association/policy database is not yet
378 * XXX able to cope with arbitrary sockaddr families.
379 * XXX When it can, remove this -EINVAL. -DaveM
380 */
381 return -EINVAL;
382 break;
383 }
384
385 return 0;
386 }
387
388 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
389 {
390 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
391 sec_ctx->sadb_x_ctx_len,
392 sizeof(uint64_t));
393 }
394
395 static inline int verify_sec_ctx_len(void *p)
396 {
397 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
398 int len;
399
400 if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE)
401 return -EINVAL;
402
403 len = pfkey_sec_ctx_len(sec_ctx);
404
405 if (sec_ctx->sadb_x_sec_len != len)
406 return -EINVAL;
407
408 return 0;
409 }
410
411 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
412 {
413 struct xfrm_user_sec_ctx *uctx = NULL;
414 int ctx_size = sec_ctx->sadb_x_ctx_len;
415
416 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
417
418 if (!uctx)
419 return NULL;
420
421 uctx->len = pfkey_sec_ctx_len(sec_ctx);
422 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
423 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
424 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
425 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
426 memcpy(uctx + 1, sec_ctx + 1,
427 uctx->ctx_len);
428
429 return uctx;
430 }
431
432 static int present_and_same_family(struct sadb_address *src,
433 struct sadb_address *dst)
434 {
435 struct sockaddr *s_addr, *d_addr;
436
437 if (!src || !dst)
438 return 0;
439
440 s_addr = (struct sockaddr *)(src + 1);
441 d_addr = (struct sockaddr *)(dst + 1);
442 if (s_addr->sa_family != d_addr->sa_family)
443 return 0;
444 if (s_addr->sa_family != AF_INET
445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
446 && s_addr->sa_family != AF_INET6
447 #endif
448 )
449 return 0;
450
451 return 1;
452 }
453
454 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
455 {
456 char *p = (char *) hdr;
457 int len = skb->len;
458
459 len -= sizeof(*hdr);
460 p += sizeof(*hdr);
461 while (len > 0) {
462 struct sadb_ext *ehdr = (struct sadb_ext *) p;
463 uint16_t ext_type;
464 int ext_len;
465
466 ext_len = ehdr->sadb_ext_len;
467 ext_len *= sizeof(uint64_t);
468 ext_type = ehdr->sadb_ext_type;
469 if (ext_len < sizeof(uint64_t) ||
470 ext_len > len ||
471 ext_type == SADB_EXT_RESERVED)
472 return -EINVAL;
473
474 if (ext_type <= SADB_EXT_MAX) {
475 int min = (int) sadb_ext_min_len[ext_type];
476 if (ext_len < min)
477 return -EINVAL;
478 if (ext_hdrs[ext_type-1] != NULL)
479 return -EINVAL;
480 if (ext_type == SADB_EXT_ADDRESS_SRC ||
481 ext_type == SADB_EXT_ADDRESS_DST ||
482 ext_type == SADB_EXT_ADDRESS_PROXY ||
483 ext_type == SADB_X_EXT_NAT_T_OA) {
484 if (verify_address_len(p))
485 return -EINVAL;
486 }
487 if (ext_type == SADB_X_EXT_SEC_CTX) {
488 if (verify_sec_ctx_len(p))
489 return -EINVAL;
490 }
491 ext_hdrs[ext_type-1] = p;
492 }
493 p += ext_len;
494 len -= ext_len;
495 }
496
497 return 0;
498 }
499
500 static uint16_t
501 pfkey_satype2proto(uint8_t satype)
502 {
503 switch (satype) {
504 case SADB_SATYPE_UNSPEC:
505 return IPSEC_PROTO_ANY;
506 case SADB_SATYPE_AH:
507 return IPPROTO_AH;
508 case SADB_SATYPE_ESP:
509 return IPPROTO_ESP;
510 case SADB_X_SATYPE_IPCOMP:
511 return IPPROTO_COMP;
512 break;
513 default:
514 return 0;
515 }
516 /* NOTREACHED */
517 }
518
519 static uint8_t
520 pfkey_proto2satype(uint16_t proto)
521 {
522 switch (proto) {
523 case IPPROTO_AH:
524 return SADB_SATYPE_AH;
525 case IPPROTO_ESP:
526 return SADB_SATYPE_ESP;
527 case IPPROTO_COMP:
528 return SADB_X_SATYPE_IPCOMP;
529 break;
530 default:
531 return 0;
532 }
533 /* NOTREACHED */
534 }
535
536 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
537 * say specifically 'just raw sockets' as we encode them as 255.
538 */
539
540 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
541 {
542 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
543 }
544
545 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
546 {
547 return (proto ? proto : IPSEC_PROTO_ANY);
548 }
549
550 static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
551 xfrm_address_t *xaddr)
552 {
553 switch (((struct sockaddr*)(addr + 1))->sa_family) {
554 case AF_INET:
555 xaddr->a4 =
556 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
557 return AF_INET;
558 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
559 case AF_INET6:
560 memcpy(xaddr->a6,
561 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
562 sizeof(struct in6_addr));
563 return AF_INET6;
564 #endif
565 default:
566 return 0;
567 }
568 /* NOTREACHED */
569 }
570
571 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
572 {
573 struct sadb_sa *sa;
574 struct sadb_address *addr;
575 uint16_t proto;
576 unsigned short family;
577 xfrm_address_t *xaddr;
578
579 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
580 if (sa == NULL)
581 return NULL;
582
583 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
584 if (proto == 0)
585 return NULL;
586
587 /* sadb_address_len should be checked by caller */
588 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
589 if (addr == NULL)
590 return NULL;
591
592 family = ((struct sockaddr *)(addr + 1))->sa_family;
593 switch (family) {
594 case AF_INET:
595 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
596 break;
597 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
598 case AF_INET6:
599 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
600 break;
601 #endif
602 default:
603 xaddr = NULL;
604 }
605
606 if (!xaddr)
607 return NULL;
608
609 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
610 }
611
612 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
613 static int
614 pfkey_sockaddr_size(sa_family_t family)
615 {
616 switch (family) {
617 case AF_INET:
618 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
619 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
620 case AF_INET6:
621 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
622 #endif
623 default:
624 return 0;
625 }
626 /* NOTREACHED */
627 }
628
629 static inline int pfkey_mode_from_xfrm(int mode)
630 {
631 switch(mode) {
632 case XFRM_MODE_TRANSPORT:
633 return IPSEC_MODE_TRANSPORT;
634 case XFRM_MODE_TUNNEL:
635 return IPSEC_MODE_TUNNEL;
636 case XFRM_MODE_BEET:
637 return IPSEC_MODE_BEET;
638 default:
639 return -1;
640 }
641 }
642
643 static inline int pfkey_mode_to_xfrm(int mode)
644 {
645 switch(mode) {
646 case IPSEC_MODE_ANY: /*XXX*/
647 case IPSEC_MODE_TRANSPORT:
648 return XFRM_MODE_TRANSPORT;
649 case IPSEC_MODE_TUNNEL:
650 return XFRM_MODE_TUNNEL;
651 case IPSEC_MODE_BEET:
652 return XFRM_MODE_BEET;
653 default:
654 return -1;
655 }
656 }
657
658 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
659 int add_keys, int hsc)
660 {
661 struct sk_buff *skb;
662 struct sadb_msg *hdr;
663 struct sadb_sa *sa;
664 struct sadb_lifetime *lifetime;
665 struct sadb_address *addr;
666 struct sadb_key *key;
667 struct sadb_x_sa2 *sa2;
668 struct sockaddr_in *sin;
669 struct sadb_x_sec_ctx *sec_ctx;
670 struct xfrm_sec_ctx *xfrm_ctx;
671 int ctx_size = 0;
672 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
673 struct sockaddr_in6 *sin6;
674 #endif
675 int size;
676 int auth_key_size = 0;
677 int encrypt_key_size = 0;
678 int sockaddr_size;
679 struct xfrm_encap_tmpl *natt = NULL;
680 int mode;
681
682 /* address family check */
683 sockaddr_size = pfkey_sockaddr_size(x->props.family);
684 if (!sockaddr_size)
685 return ERR_PTR(-EINVAL);
686
687 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
688 key(AE), (identity(SD),) (sensitivity)> */
689 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
690 sizeof(struct sadb_lifetime) +
691 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
692 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
693 sizeof(struct sadb_address)*2 +
694 sockaddr_size*2 +
695 sizeof(struct sadb_x_sa2);
696
697 if ((xfrm_ctx = x->security)) {
698 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
699 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
700 }
701
702 /* identity & sensitivity */
703
704 if ((x->props.family == AF_INET &&
705 x->sel.saddr.a4 != x->props.saddr.a4)
706 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
707 || (x->props.family == AF_INET6 &&
708 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
709 #endif
710 )
711 size += sizeof(struct sadb_address) + sockaddr_size;
712
713 if (add_keys) {
714 if (x->aalg && x->aalg->alg_key_len) {
715 auth_key_size =
716 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
717 size += sizeof(struct sadb_key) + auth_key_size;
718 }
719 if (x->ealg && x->ealg->alg_key_len) {
720 encrypt_key_size =
721 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
722 size += sizeof(struct sadb_key) + encrypt_key_size;
723 }
724 }
725 if (x->encap)
726 natt = x->encap;
727
728 if (natt && natt->encap_type) {
729 size += sizeof(struct sadb_x_nat_t_type);
730 size += sizeof(struct sadb_x_nat_t_port);
731 size += sizeof(struct sadb_x_nat_t_port);
732 }
733
734 skb = alloc_skb(size + 16, GFP_ATOMIC);
735 if (skb == NULL)
736 return ERR_PTR(-ENOBUFS);
737
738 /* call should fill header later */
739 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
740 memset(hdr, 0, size); /* XXX do we need this ? */
741 hdr->sadb_msg_len = size / sizeof(uint64_t);
742
743 /* sa */
744 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
745 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
746 sa->sadb_sa_exttype = SADB_EXT_SA;
747 sa->sadb_sa_spi = x->id.spi;
748 sa->sadb_sa_replay = x->props.replay_window;
749 switch (x->km.state) {
750 case XFRM_STATE_VALID:
751 sa->sadb_sa_state = x->km.dying ?
752 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
753 break;
754 case XFRM_STATE_ACQ:
755 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
756 break;
757 default:
758 sa->sadb_sa_state = SADB_SASTATE_DEAD;
759 break;
760 }
761 sa->sadb_sa_auth = 0;
762 if (x->aalg) {
763 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
764 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
765 }
766 sa->sadb_sa_encrypt = 0;
767 BUG_ON(x->ealg && x->calg);
768 if (x->ealg) {
769 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
770 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
771 }
772 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
773 if (x->calg) {
774 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
775 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
776 }
777
778 sa->sadb_sa_flags = 0;
779 if (x->props.flags & XFRM_STATE_NOECN)
780 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
781 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
782 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
783 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
784 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
785
786 /* hard time */
787 if (hsc & 2) {
788 lifetime = (struct sadb_lifetime *) skb_put(skb,
789 sizeof(struct sadb_lifetime));
790 lifetime->sadb_lifetime_len =
791 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
792 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
793 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
794 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
795 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
796 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
797 }
798 /* soft time */
799 if (hsc & 1) {
800 lifetime = (struct sadb_lifetime *) skb_put(skb,
801 sizeof(struct sadb_lifetime));
802 lifetime->sadb_lifetime_len =
803 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
804 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
805 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
806 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
807 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
808 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
809 }
810 /* current time */
811 lifetime = (struct sadb_lifetime *) skb_put(skb,
812 sizeof(struct sadb_lifetime));
813 lifetime->sadb_lifetime_len =
814 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
815 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
816 lifetime->sadb_lifetime_allocations = x->curlft.packets;
817 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
818 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
819 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
820 /* src address */
821 addr = (struct sadb_address*) skb_put(skb,
822 sizeof(struct sadb_address)+sockaddr_size);
823 addr->sadb_address_len =
824 (sizeof(struct sadb_address)+sockaddr_size)/
825 sizeof(uint64_t);
826 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
827 /* "if the ports are non-zero, then the sadb_address_proto field,
828 normally zero, MUST be filled in with the transport
829 protocol's number." - RFC2367 */
830 addr->sadb_address_proto = 0;
831 addr->sadb_address_reserved = 0;
832 if (x->props.family == AF_INET) {
833 addr->sadb_address_prefixlen = 32;
834
835 sin = (struct sockaddr_in *) (addr + 1);
836 sin->sin_family = AF_INET;
837 sin->sin_addr.s_addr = x->props.saddr.a4;
838 sin->sin_port = 0;
839 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
840 }
841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
842 else if (x->props.family == AF_INET6) {
843 addr->sadb_address_prefixlen = 128;
844
845 sin6 = (struct sockaddr_in6 *) (addr + 1);
846 sin6->sin6_family = AF_INET6;
847 sin6->sin6_port = 0;
848 sin6->sin6_flowinfo = 0;
849 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
850 sizeof(struct in6_addr));
851 sin6->sin6_scope_id = 0;
852 }
853 #endif
854 else
855 BUG();
856
857 /* dst address */
858 addr = (struct sadb_address*) skb_put(skb,
859 sizeof(struct sadb_address)+sockaddr_size);
860 addr->sadb_address_len =
861 (sizeof(struct sadb_address)+sockaddr_size)/
862 sizeof(uint64_t);
863 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
864 addr->sadb_address_proto = 0;
865 addr->sadb_address_prefixlen = 32; /* XXX */
866 addr->sadb_address_reserved = 0;
867 if (x->props.family == AF_INET) {
868 sin = (struct sockaddr_in *) (addr + 1);
869 sin->sin_family = AF_INET;
870 sin->sin_addr.s_addr = x->id.daddr.a4;
871 sin->sin_port = 0;
872 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
873
874 if (x->sel.saddr.a4 != x->props.saddr.a4) {
875 addr = (struct sadb_address*) skb_put(skb,
876 sizeof(struct sadb_address)+sockaddr_size);
877 addr->sadb_address_len =
878 (sizeof(struct sadb_address)+sockaddr_size)/
879 sizeof(uint64_t);
880 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
881 addr->sadb_address_proto =
882 pfkey_proto_from_xfrm(x->sel.proto);
883 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
884 addr->sadb_address_reserved = 0;
885
886 sin = (struct sockaddr_in *) (addr + 1);
887 sin->sin_family = AF_INET;
888 sin->sin_addr.s_addr = x->sel.saddr.a4;
889 sin->sin_port = x->sel.sport;
890 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
891 }
892 }
893 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
894 else if (x->props.family == AF_INET6) {
895 addr->sadb_address_prefixlen = 128;
896
897 sin6 = (struct sockaddr_in6 *) (addr + 1);
898 sin6->sin6_family = AF_INET6;
899 sin6->sin6_port = 0;
900 sin6->sin6_flowinfo = 0;
901 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
902 sin6->sin6_scope_id = 0;
903
904 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
905 sizeof(struct in6_addr))) {
906 addr = (struct sadb_address *) skb_put(skb,
907 sizeof(struct sadb_address)+sockaddr_size);
908 addr->sadb_address_len =
909 (sizeof(struct sadb_address)+sockaddr_size)/
910 sizeof(uint64_t);
911 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
912 addr->sadb_address_proto =
913 pfkey_proto_from_xfrm(x->sel.proto);
914 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
915 addr->sadb_address_reserved = 0;
916
917 sin6 = (struct sockaddr_in6 *) (addr + 1);
918 sin6->sin6_family = AF_INET6;
919 sin6->sin6_port = x->sel.sport;
920 sin6->sin6_flowinfo = 0;
921 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
922 sizeof(struct in6_addr));
923 sin6->sin6_scope_id = 0;
924 }
925 }
926 #endif
927 else
928 BUG();
929
930 /* auth key */
931 if (add_keys && auth_key_size) {
932 key = (struct sadb_key *) skb_put(skb,
933 sizeof(struct sadb_key)+auth_key_size);
934 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
935 sizeof(uint64_t);
936 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
937 key->sadb_key_bits = x->aalg->alg_key_len;
938 key->sadb_key_reserved = 0;
939 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
940 }
941 /* encrypt key */
942 if (add_keys && encrypt_key_size) {
943 key = (struct sadb_key *) skb_put(skb,
944 sizeof(struct sadb_key)+encrypt_key_size);
945 key->sadb_key_len = (sizeof(struct sadb_key) +
946 encrypt_key_size) / sizeof(uint64_t);
947 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
948 key->sadb_key_bits = x->ealg->alg_key_len;
949 key->sadb_key_reserved = 0;
950 memcpy(key + 1, x->ealg->alg_key,
951 (x->ealg->alg_key_len+7)/8);
952 }
953
954 /* sa */
955 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
956 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
957 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
958 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
959 kfree_skb(skb);
960 return ERR_PTR(-EINVAL);
961 }
962 sa2->sadb_x_sa2_mode = mode;
963 sa2->sadb_x_sa2_reserved1 = 0;
964 sa2->sadb_x_sa2_reserved2 = 0;
965 sa2->sadb_x_sa2_sequence = 0;
966 sa2->sadb_x_sa2_reqid = x->props.reqid;
967
968 if (natt && natt->encap_type) {
969 struct sadb_x_nat_t_type *n_type;
970 struct sadb_x_nat_t_port *n_port;
971
972 /* type */
973 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
974 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
975 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
976 n_type->sadb_x_nat_t_type_type = natt->encap_type;
977 n_type->sadb_x_nat_t_type_reserved[0] = 0;
978 n_type->sadb_x_nat_t_type_reserved[1] = 0;
979 n_type->sadb_x_nat_t_type_reserved[2] = 0;
980
981 /* source port */
982 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
983 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
984 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
985 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
986 n_port->sadb_x_nat_t_port_reserved = 0;
987
988 /* dest port */
989 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
990 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
991 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
992 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
993 n_port->sadb_x_nat_t_port_reserved = 0;
994 }
995
996 /* security context */
997 if (xfrm_ctx) {
998 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
999 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000 sec_ctx->sadb_x_sec_len =
1001 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007 xfrm_ctx->ctx_len);
1008 }
1009
1010 return skb;
1011 }
1012
1013
1014 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1015 {
1016 struct sk_buff *skb;
1017
1018 spin_lock_bh(&x->lock);
1019 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1020 spin_unlock_bh(&x->lock);
1021
1022 return skb;
1023 }
1024
1025 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1026 int hsc)
1027 {
1028 return __pfkey_xfrm_state2msg(x, 0, hsc);
1029 }
1030
1031 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1032 void **ext_hdrs)
1033 {
1034 struct xfrm_state *x;
1035 struct sadb_lifetime *lifetime;
1036 struct sadb_sa *sa;
1037 struct sadb_key *key;
1038 struct sadb_x_sec_ctx *sec_ctx;
1039 uint16_t proto;
1040 int err;
1041
1042
1043 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1044 if (!sa ||
1045 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1046 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1047 return ERR_PTR(-EINVAL);
1048 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1049 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1050 return ERR_PTR(-EINVAL);
1051 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1052 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1053 return ERR_PTR(-EINVAL);
1054 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1055 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1056 return ERR_PTR(-EINVAL);
1057
1058 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1059 if (proto == 0)
1060 return ERR_PTR(-EINVAL);
1061
1062 /* default error is no buffer space */
1063 err = -ENOBUFS;
1064
1065 /* RFC2367:
1066
1067 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1068 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1069 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1070 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1071 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1072 not true.
1073
1074 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1075 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1076 */
1077 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1078 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1079 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1080 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1081 return ERR_PTR(-EINVAL);
1082 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1083 if (key != NULL &&
1084 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1085 ((key->sadb_key_bits+7) / 8 == 0 ||
1086 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1087 return ERR_PTR(-EINVAL);
1088 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1089 if (key != NULL &&
1090 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1091 ((key->sadb_key_bits+7) / 8 == 0 ||
1092 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1093 return ERR_PTR(-EINVAL);
1094
1095 x = xfrm_state_alloc();
1096 if (x == NULL)
1097 return ERR_PTR(-ENOBUFS);
1098
1099 x->id.proto = proto;
1100 x->id.spi = sa->sadb_sa_spi;
1101 x->props.replay_window = sa->sadb_sa_replay;
1102 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1103 x->props.flags |= XFRM_STATE_NOECN;
1104 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1105 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1106 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1107 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1108
1109 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1110 if (lifetime != NULL) {
1111 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1112 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1113 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1114 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1115 }
1116 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1117 if (lifetime != NULL) {
1118 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1119 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1120 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1121 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1122 }
1123
1124 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1125 if (sec_ctx != NULL) {
1126 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1127
1128 if (!uctx)
1129 goto out;
1130
1131 err = security_xfrm_state_alloc(x, uctx);
1132 kfree(uctx);
1133
1134 if (err)
1135 goto out;
1136 }
1137
1138 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1139 if (sa->sadb_sa_auth) {
1140 int keysize = 0;
1141 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1142 if (!a) {
1143 err = -ENOSYS;
1144 goto out;
1145 }
1146 if (key)
1147 keysize = (key->sadb_key_bits + 7) / 8;
1148 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1149 if (!x->aalg)
1150 goto out;
1151 strcpy(x->aalg->alg_name, a->name);
1152 x->aalg->alg_key_len = 0;
1153 if (key) {
1154 x->aalg->alg_key_len = key->sadb_key_bits;
1155 memcpy(x->aalg->alg_key, key+1, keysize);
1156 }
1157 x->props.aalgo = sa->sadb_sa_auth;
1158 /* x->algo.flags = sa->sadb_sa_flags; */
1159 }
1160 if (sa->sadb_sa_encrypt) {
1161 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1162 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1163 if (!a) {
1164 err = -ENOSYS;
1165 goto out;
1166 }
1167 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1168 if (!x->calg)
1169 goto out;
1170 strcpy(x->calg->alg_name, a->name);
1171 x->props.calgo = sa->sadb_sa_encrypt;
1172 } else {
1173 int keysize = 0;
1174 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1175 if (!a) {
1176 err = -ENOSYS;
1177 goto out;
1178 }
1179 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1180 if (key)
1181 keysize = (key->sadb_key_bits + 7) / 8;
1182 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1183 if (!x->ealg)
1184 goto out;
1185 strcpy(x->ealg->alg_name, a->name);
1186 x->ealg->alg_key_len = 0;
1187 if (key) {
1188 x->ealg->alg_key_len = key->sadb_key_bits;
1189 memcpy(x->ealg->alg_key, key+1, keysize);
1190 }
1191 x->props.ealgo = sa->sadb_sa_encrypt;
1192 }
1193 }
1194 /* x->algo.flags = sa->sadb_sa_flags; */
1195
1196 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1197 &x->props.saddr);
1198 if (!x->props.family) {
1199 err = -EAFNOSUPPORT;
1200 goto out;
1201 }
1202 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1203 &x->id.daddr);
1204
1205 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1206 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1207 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1208 if (mode < 0) {
1209 err = -EINVAL;
1210 goto out;
1211 }
1212 x->props.mode = mode;
1213 x->props.reqid = sa2->sadb_x_sa2_reqid;
1214 }
1215
1216 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1217 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1218
1219 /* Nobody uses this, but we try. */
1220 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1221 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1222 }
1223
1224 if (!x->sel.family)
1225 x->sel.family = x->props.family;
1226
1227 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1228 struct sadb_x_nat_t_type* n_type;
1229 struct xfrm_encap_tmpl *natt;
1230
1231 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1232 if (!x->encap)
1233 goto out;
1234
1235 natt = x->encap;
1236 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1237 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1238
1239 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1240 struct sadb_x_nat_t_port* n_port =
1241 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1242 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1243 }
1244 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1245 struct sadb_x_nat_t_port* n_port =
1246 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1247 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1248 }
1249 }
1250
1251 err = xfrm_init_state(x);
1252 if (err)
1253 goto out;
1254
1255 x->km.seq = hdr->sadb_msg_seq;
1256 return x;
1257
1258 out:
1259 x->km.state = XFRM_STATE_DEAD;
1260 xfrm_state_put(x);
1261 return ERR_PTR(err);
1262 }
1263
1264 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1265 {
1266 return -EOPNOTSUPP;
1267 }
1268
1269 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1270 {
1271 struct sk_buff *resp_skb;
1272 struct sadb_x_sa2 *sa2;
1273 struct sadb_address *saddr, *daddr;
1274 struct sadb_msg *out_hdr;
1275 struct sadb_spirange *range;
1276 struct xfrm_state *x = NULL;
1277 int mode;
1278 int err;
1279 u32 min_spi, max_spi;
1280 u32 reqid;
1281 u8 proto;
1282 unsigned short family;
1283 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1284
1285 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1286 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1287 return -EINVAL;
1288
1289 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1290 if (proto == 0)
1291 return -EINVAL;
1292
1293 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1294 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1295 if (mode < 0)
1296 return -EINVAL;
1297 reqid = sa2->sadb_x_sa2_reqid;
1298 } else {
1299 mode = 0;
1300 reqid = 0;
1301 }
1302
1303 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1304 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1305
1306 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1307 switch (family) {
1308 case AF_INET:
1309 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1310 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1311 break;
1312 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1313 case AF_INET6:
1314 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1315 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1316 break;
1317 #endif
1318 }
1319
1320 if (hdr->sadb_msg_seq) {
1321 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1322 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1323 xfrm_state_put(x);
1324 x = NULL;
1325 }
1326 }
1327
1328 if (!x)
1329 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1330
1331 if (x == NULL)
1332 return -ENOENT;
1333
1334 min_spi = 0x100;
1335 max_spi = 0x0fffffff;
1336
1337 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1338 if (range) {
1339 min_spi = range->sadb_spirange_min;
1340 max_spi = range->sadb_spirange_max;
1341 }
1342
1343 err = xfrm_alloc_spi(x, min_spi, max_spi);
1344 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1345
1346 if (IS_ERR(resp_skb)) {
1347 xfrm_state_put(x);
1348 return PTR_ERR(resp_skb);
1349 }
1350
1351 out_hdr = (struct sadb_msg *) resp_skb->data;
1352 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1353 out_hdr->sadb_msg_type = SADB_GETSPI;
1354 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1355 out_hdr->sadb_msg_errno = 0;
1356 out_hdr->sadb_msg_reserved = 0;
1357 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1358 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1359
1360 xfrm_state_put(x);
1361
1362 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1363
1364 return 0;
1365 }
1366
1367 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1368 {
1369 struct xfrm_state *x;
1370
1371 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1372 return -EOPNOTSUPP;
1373
1374 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1375 return 0;
1376
1377 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1378 if (x == NULL)
1379 return 0;
1380
1381 spin_lock_bh(&x->lock);
1382 if (x->km.state == XFRM_STATE_ACQ) {
1383 x->km.state = XFRM_STATE_ERROR;
1384 wake_up(&km_waitq);
1385 }
1386 spin_unlock_bh(&x->lock);
1387 xfrm_state_put(x);
1388 return 0;
1389 }
1390
1391 static inline int event2poltype(int event)
1392 {
1393 switch (event) {
1394 case XFRM_MSG_DELPOLICY:
1395 return SADB_X_SPDDELETE;
1396 case XFRM_MSG_NEWPOLICY:
1397 return SADB_X_SPDADD;
1398 case XFRM_MSG_UPDPOLICY:
1399 return SADB_X_SPDUPDATE;
1400 case XFRM_MSG_POLEXPIRE:
1401 // return SADB_X_SPDEXPIRE;
1402 default:
1403 printk("pfkey: Unknown policy event %d\n", event);
1404 break;
1405 }
1406
1407 return 0;
1408 }
1409
1410 static inline int event2keytype(int event)
1411 {
1412 switch (event) {
1413 case XFRM_MSG_DELSA:
1414 return SADB_DELETE;
1415 case XFRM_MSG_NEWSA:
1416 return SADB_ADD;
1417 case XFRM_MSG_UPDSA:
1418 return SADB_UPDATE;
1419 case XFRM_MSG_EXPIRE:
1420 return SADB_EXPIRE;
1421 default:
1422 printk("pfkey: Unknown SA event %d\n", event);
1423 break;
1424 }
1425
1426 return 0;
1427 }
1428
1429 /* ADD/UPD/DEL */
1430 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1431 {
1432 struct sk_buff *skb;
1433 struct sadb_msg *hdr;
1434
1435 skb = pfkey_xfrm_state2msg(x);
1436
1437 if (IS_ERR(skb))
1438 return PTR_ERR(skb);
1439
1440 hdr = (struct sadb_msg *) skb->data;
1441 hdr->sadb_msg_version = PF_KEY_V2;
1442 hdr->sadb_msg_type = event2keytype(c->event);
1443 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1444 hdr->sadb_msg_errno = 0;
1445 hdr->sadb_msg_reserved = 0;
1446 hdr->sadb_msg_seq = c->seq;
1447 hdr->sadb_msg_pid = c->pid;
1448
1449 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1450
1451 return 0;
1452 }
1453
1454 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1455 {
1456 struct xfrm_state *x;
1457 int err;
1458 struct km_event c;
1459
1460 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1461 if (IS_ERR(x))
1462 return PTR_ERR(x);
1463
1464 xfrm_state_hold(x);
1465 if (hdr->sadb_msg_type == SADB_ADD)
1466 err = xfrm_state_add(x);
1467 else
1468 err = xfrm_state_update(x);
1469
1470 xfrm_audit_state_add(x, err ? 0 : 1,
1471 audit_get_loginuid(current->audit_context), 0);
1472
1473 if (err < 0) {
1474 x->km.state = XFRM_STATE_DEAD;
1475 __xfrm_state_put(x);
1476 goto out;
1477 }
1478
1479 if (hdr->sadb_msg_type == SADB_ADD)
1480 c.event = XFRM_MSG_NEWSA;
1481 else
1482 c.event = XFRM_MSG_UPDSA;
1483 c.seq = hdr->sadb_msg_seq;
1484 c.pid = hdr->sadb_msg_pid;
1485 km_state_notify(x, &c);
1486 out:
1487 xfrm_state_put(x);
1488 return err;
1489 }
1490
1491 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1492 {
1493 struct xfrm_state *x;
1494 struct km_event c;
1495 int err;
1496
1497 if (!ext_hdrs[SADB_EXT_SA-1] ||
1498 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1499 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1500 return -EINVAL;
1501
1502 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1503 if (x == NULL)
1504 return -ESRCH;
1505
1506 if ((err = security_xfrm_state_delete(x)))
1507 goto out;
1508
1509 if (xfrm_state_kern(x)) {
1510 err = -EPERM;
1511 goto out;
1512 }
1513
1514 err = xfrm_state_delete(x);
1515
1516 if (err < 0)
1517 goto out;
1518
1519 c.seq = hdr->sadb_msg_seq;
1520 c.pid = hdr->sadb_msg_pid;
1521 c.event = XFRM_MSG_DELSA;
1522 km_state_notify(x, &c);
1523 out:
1524 xfrm_audit_state_delete(x, err ? 0 : 1,
1525 audit_get_loginuid(current->audit_context), 0);
1526 xfrm_state_put(x);
1527
1528 return err;
1529 }
1530
1531 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1532 {
1533 __u8 proto;
1534 struct sk_buff *out_skb;
1535 struct sadb_msg *out_hdr;
1536 struct xfrm_state *x;
1537
1538 if (!ext_hdrs[SADB_EXT_SA-1] ||
1539 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1540 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1541 return -EINVAL;
1542
1543 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1544 if (x == NULL)
1545 return -ESRCH;
1546
1547 out_skb = pfkey_xfrm_state2msg(x);
1548 proto = x->id.proto;
1549 xfrm_state_put(x);
1550 if (IS_ERR(out_skb))
1551 return PTR_ERR(out_skb);
1552
1553 out_hdr = (struct sadb_msg *) out_skb->data;
1554 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1555 out_hdr->sadb_msg_type = SADB_DUMP;
1556 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1557 out_hdr->sadb_msg_errno = 0;
1558 out_hdr->sadb_msg_reserved = 0;
1559 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1560 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1561 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1562
1563 return 0;
1564 }
1565
1566 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1567 gfp_t allocation)
1568 {
1569 struct sk_buff *skb;
1570 struct sadb_msg *hdr;
1571 int len, auth_len, enc_len, i;
1572
1573 auth_len = xfrm_count_auth_supported();
1574 if (auth_len) {
1575 auth_len *= sizeof(struct sadb_alg);
1576 auth_len += sizeof(struct sadb_supported);
1577 }
1578
1579 enc_len = xfrm_count_enc_supported();
1580 if (enc_len) {
1581 enc_len *= sizeof(struct sadb_alg);
1582 enc_len += sizeof(struct sadb_supported);
1583 }
1584
1585 len = enc_len + auth_len + sizeof(struct sadb_msg);
1586
1587 skb = alloc_skb(len + 16, allocation);
1588 if (!skb)
1589 goto out_put_algs;
1590
1591 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1592 pfkey_hdr_dup(hdr, orig);
1593 hdr->sadb_msg_errno = 0;
1594 hdr->sadb_msg_len = len / sizeof(uint64_t);
1595
1596 if (auth_len) {
1597 struct sadb_supported *sp;
1598 struct sadb_alg *ap;
1599
1600 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1601 ap = (struct sadb_alg *) (sp + 1);
1602
1603 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1604 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1605
1606 for (i = 0; ; i++) {
1607 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1608 if (!aalg)
1609 break;
1610 if (aalg->available)
1611 *ap++ = aalg->desc;
1612 }
1613 }
1614
1615 if (enc_len) {
1616 struct sadb_supported *sp;
1617 struct sadb_alg *ap;
1618
1619 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1620 ap = (struct sadb_alg *) (sp + 1);
1621
1622 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1623 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1624
1625 for (i = 0; ; i++) {
1626 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1627 if (!ealg)
1628 break;
1629 if (ealg->available)
1630 *ap++ = ealg->desc;
1631 }
1632 }
1633
1634 out_put_algs:
1635 return skb;
1636 }
1637
1638 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1639 {
1640 struct pfkey_sock *pfk = pfkey_sk(sk);
1641 struct sk_buff *supp_skb;
1642
1643 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1644 return -EINVAL;
1645
1646 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1647 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1648 return -EEXIST;
1649 pfk->registered |= (1<<hdr->sadb_msg_satype);
1650 }
1651
1652 xfrm_probe_algs();
1653
1654 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1655 if (!supp_skb) {
1656 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1657 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1658
1659 return -ENOBUFS;
1660 }
1661
1662 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1663
1664 return 0;
1665 }
1666
1667 static int key_notify_sa_flush(struct km_event *c)
1668 {
1669 struct sk_buff *skb;
1670 struct sadb_msg *hdr;
1671
1672 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1673 if (!skb)
1674 return -ENOBUFS;
1675 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1676 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1677 hdr->sadb_msg_type = SADB_FLUSH;
1678 hdr->sadb_msg_seq = c->seq;
1679 hdr->sadb_msg_pid = c->pid;
1680 hdr->sadb_msg_version = PF_KEY_V2;
1681 hdr->sadb_msg_errno = (uint8_t) 0;
1682 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1683
1684 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1685
1686 return 0;
1687 }
1688
1689 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1690 {
1691 unsigned proto;
1692 struct km_event c;
1693 struct xfrm_audit audit_info;
1694 int err;
1695
1696 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1697 if (proto == 0)
1698 return -EINVAL;
1699
1700 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1701 audit_info.secid = 0;
1702 err = xfrm_state_flush(proto, &audit_info);
1703 if (err)
1704 return err;
1705 c.data.proto = proto;
1706 c.seq = hdr->sadb_msg_seq;
1707 c.pid = hdr->sadb_msg_pid;
1708 c.event = XFRM_MSG_FLUSHSA;
1709 km_state_notify(NULL, &c);
1710
1711 return 0;
1712 }
1713
1714 struct pfkey_dump_data
1715 {
1716 struct sk_buff *skb;
1717 struct sadb_msg *hdr;
1718 struct sock *sk;
1719 };
1720
1721 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1722 {
1723 struct pfkey_dump_data *data = ptr;
1724 struct sk_buff *out_skb;
1725 struct sadb_msg *out_hdr;
1726
1727 out_skb = pfkey_xfrm_state2msg(x);
1728 if (IS_ERR(out_skb))
1729 return PTR_ERR(out_skb);
1730
1731 out_hdr = (struct sadb_msg *) out_skb->data;
1732 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1733 out_hdr->sadb_msg_type = SADB_DUMP;
1734 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1735 out_hdr->sadb_msg_errno = 0;
1736 out_hdr->sadb_msg_reserved = 0;
1737 out_hdr->sadb_msg_seq = count;
1738 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1739 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1740 return 0;
1741 }
1742
1743 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1744 {
1745 u8 proto;
1746 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1747
1748 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1749 if (proto == 0)
1750 return -EINVAL;
1751
1752 return xfrm_state_walk(proto, dump_sa, &data);
1753 }
1754
1755 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1756 {
1757 struct pfkey_sock *pfk = pfkey_sk(sk);
1758 int satype = hdr->sadb_msg_satype;
1759
1760 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1761 /* XXX we mangle packet... */
1762 hdr->sadb_msg_errno = 0;
1763 if (satype != 0 && satype != 1)
1764 return -EINVAL;
1765 pfk->promisc = satype;
1766 }
1767 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1768 return 0;
1769 }
1770
1771 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1772 {
1773 int i;
1774 u32 reqid = *(u32*)ptr;
1775
1776 for (i=0; i<xp->xfrm_nr; i++) {
1777 if (xp->xfrm_vec[i].reqid == reqid)
1778 return -EEXIST;
1779 }
1780 return 0;
1781 }
1782
1783 static u32 gen_reqid(void)
1784 {
1785 u32 start;
1786 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1787
1788 start = reqid;
1789 do {
1790 ++reqid;
1791 if (reqid == 0)
1792 reqid = IPSEC_MANUAL_REQID_MAX+1;
1793 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1794 (void*)&reqid) != -EEXIST)
1795 return reqid;
1796 } while (reqid != start);
1797 return 0;
1798 }
1799
1800 static int
1801 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1802 {
1803 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1804 struct sockaddr_in *sin;
1805 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1806 struct sockaddr_in6 *sin6;
1807 #endif
1808 int mode;
1809
1810 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1811 return -ELOOP;
1812
1813 if (rq->sadb_x_ipsecrequest_mode == 0)
1814 return -EINVAL;
1815
1816 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1817 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1818 return -EINVAL;
1819 t->mode = mode;
1820 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1821 t->optional = 1;
1822 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1823 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1824 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1825 t->reqid = 0;
1826 if (!t->reqid && !(t->reqid = gen_reqid()))
1827 return -ENOBUFS;
1828 }
1829
1830 /* addresses present only in tunnel mode */
1831 if (t->mode == XFRM_MODE_TUNNEL) {
1832 struct sockaddr *sa;
1833 sa = (struct sockaddr *)(rq+1);
1834 switch(sa->sa_family) {
1835 case AF_INET:
1836 sin = (struct sockaddr_in*)sa;
1837 t->saddr.a4 = sin->sin_addr.s_addr;
1838 sin++;
1839 if (sin->sin_family != AF_INET)
1840 return -EINVAL;
1841 t->id.daddr.a4 = sin->sin_addr.s_addr;
1842 break;
1843 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1844 case AF_INET6:
1845 sin6 = (struct sockaddr_in6*)sa;
1846 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1847 sin6++;
1848 if (sin6->sin6_family != AF_INET6)
1849 return -EINVAL;
1850 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1851 break;
1852 #endif
1853 default:
1854 return -EINVAL;
1855 }
1856 t->encap_family = sa->sa_family;
1857 } else
1858 t->encap_family = xp->family;
1859
1860 /* No way to set this via kame pfkey */
1861 t->aalgos = t->ealgos = t->calgos = ~0;
1862 xp->xfrm_nr++;
1863 return 0;
1864 }
1865
1866 static int
1867 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1868 {
1869 int err;
1870 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1871 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1872
1873 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1874 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1875 return err;
1876 len -= rq->sadb_x_ipsecrequest_len;
1877 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1878 }
1879 return 0;
1880 }
1881
1882 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1883 {
1884 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1885
1886 if (xfrm_ctx) {
1887 int len = sizeof(struct sadb_x_sec_ctx);
1888 len += xfrm_ctx->ctx_len;
1889 return PFKEY_ALIGN8(len);
1890 }
1891 return 0;
1892 }
1893
1894 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1895 {
1896 struct xfrm_tmpl *t;
1897 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1898 int socklen = 0;
1899 int i;
1900
1901 for (i=0; i<xp->xfrm_nr; i++) {
1902 t = xp->xfrm_vec + i;
1903 socklen += (t->encap_family == AF_INET ?
1904 sizeof(struct sockaddr_in) :
1905 sizeof(struct sockaddr_in6));
1906 }
1907
1908 return sizeof(struct sadb_msg) +
1909 (sizeof(struct sadb_lifetime) * 3) +
1910 (sizeof(struct sadb_address) * 2) +
1911 (sockaddr_size * 2) +
1912 sizeof(struct sadb_x_policy) +
1913 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1914 (socklen * 2) +
1915 pfkey_xfrm_policy2sec_ctx_size(xp);
1916 }
1917
1918 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1919 {
1920 struct sk_buff *skb;
1921 int size;
1922
1923 size = pfkey_xfrm_policy2msg_size(xp);
1924
1925 skb = alloc_skb(size + 16, GFP_ATOMIC);
1926 if (skb == NULL)
1927 return ERR_PTR(-ENOBUFS);
1928
1929 return skb;
1930 }
1931
1932 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1933 {
1934 struct sadb_msg *hdr;
1935 struct sadb_address *addr;
1936 struct sadb_lifetime *lifetime;
1937 struct sadb_x_policy *pol;
1938 struct sockaddr_in *sin;
1939 struct sadb_x_sec_ctx *sec_ctx;
1940 struct xfrm_sec_ctx *xfrm_ctx;
1941 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1942 struct sockaddr_in6 *sin6;
1943 #endif
1944 int i;
1945 int size;
1946 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1947 int socklen = (xp->family == AF_INET ?
1948 sizeof(struct sockaddr_in) :
1949 sizeof(struct sockaddr_in6));
1950
1951 size = pfkey_xfrm_policy2msg_size(xp);
1952
1953 /* call should fill header later */
1954 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1955 memset(hdr, 0, size); /* XXX do we need this ? */
1956
1957 /* src address */
1958 addr = (struct sadb_address*) skb_put(skb,
1959 sizeof(struct sadb_address)+sockaddr_size);
1960 addr->sadb_address_len =
1961 (sizeof(struct sadb_address)+sockaddr_size)/
1962 sizeof(uint64_t);
1963 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1964 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1965 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1966 addr->sadb_address_reserved = 0;
1967 /* src address */
1968 if (xp->family == AF_INET) {
1969 sin = (struct sockaddr_in *) (addr + 1);
1970 sin->sin_family = AF_INET;
1971 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1972 sin->sin_port = xp->selector.sport;
1973 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1974 }
1975 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1976 else if (xp->family == AF_INET6) {
1977 sin6 = (struct sockaddr_in6 *) (addr + 1);
1978 sin6->sin6_family = AF_INET6;
1979 sin6->sin6_port = xp->selector.sport;
1980 sin6->sin6_flowinfo = 0;
1981 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1982 sizeof(struct in6_addr));
1983 sin6->sin6_scope_id = 0;
1984 }
1985 #endif
1986 else
1987 BUG();
1988
1989 /* dst address */
1990 addr = (struct sadb_address*) skb_put(skb,
1991 sizeof(struct sadb_address)+sockaddr_size);
1992 addr->sadb_address_len =
1993 (sizeof(struct sadb_address)+sockaddr_size)/
1994 sizeof(uint64_t);
1995 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1996 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1997 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1998 addr->sadb_address_reserved = 0;
1999 if (xp->family == AF_INET) {
2000 sin = (struct sockaddr_in *) (addr + 1);
2001 sin->sin_family = AF_INET;
2002 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2003 sin->sin_port = xp->selector.dport;
2004 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2005 }
2006 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2007 else if (xp->family == AF_INET6) {
2008 sin6 = (struct sockaddr_in6 *) (addr + 1);
2009 sin6->sin6_family = AF_INET6;
2010 sin6->sin6_port = xp->selector.dport;
2011 sin6->sin6_flowinfo = 0;
2012 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2013 sizeof(struct in6_addr));
2014 sin6->sin6_scope_id = 0;
2015 }
2016 #endif
2017 else
2018 BUG();
2019
2020 /* hard time */
2021 lifetime = (struct sadb_lifetime *) skb_put(skb,
2022 sizeof(struct sadb_lifetime));
2023 lifetime->sadb_lifetime_len =
2024 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2025 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2026 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2027 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2028 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2029 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2030 /* soft time */
2031 lifetime = (struct sadb_lifetime *) skb_put(skb,
2032 sizeof(struct sadb_lifetime));
2033 lifetime->sadb_lifetime_len =
2034 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2035 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2036 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2037 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2038 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2039 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2040 /* current time */
2041 lifetime = (struct sadb_lifetime *) skb_put(skb,
2042 sizeof(struct sadb_lifetime));
2043 lifetime->sadb_lifetime_len =
2044 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2045 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2046 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2047 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2048 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2049 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2050
2051 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2052 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2053 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2054 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2055 if (xp->action == XFRM_POLICY_ALLOW) {
2056 if (xp->xfrm_nr)
2057 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2058 else
2059 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2060 }
2061 pol->sadb_x_policy_dir = dir+1;
2062 pol->sadb_x_policy_id = xp->index;
2063 pol->sadb_x_policy_priority = xp->priority;
2064
2065 for (i=0; i<xp->xfrm_nr; i++) {
2066 struct sadb_x_ipsecrequest *rq;
2067 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2068 int req_size;
2069 int mode;
2070
2071 req_size = sizeof(struct sadb_x_ipsecrequest);
2072 if (t->mode == XFRM_MODE_TUNNEL)
2073 req_size += ((t->encap_family == AF_INET ?
2074 sizeof(struct sockaddr_in) :
2075 sizeof(struct sockaddr_in6)) * 2);
2076 else
2077 size -= 2*socklen;
2078 rq = (void*)skb_put(skb, req_size);
2079 pol->sadb_x_policy_len += req_size/8;
2080 memset(rq, 0, sizeof(*rq));
2081 rq->sadb_x_ipsecrequest_len = req_size;
2082 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2083 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2084 return -EINVAL;
2085 rq->sadb_x_ipsecrequest_mode = mode;
2086 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2087 if (t->reqid)
2088 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2089 if (t->optional)
2090 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2091 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2092 if (t->mode == XFRM_MODE_TUNNEL) {
2093 switch (t->encap_family) {
2094 case AF_INET:
2095 sin = (void*)(rq+1);
2096 sin->sin_family = AF_INET;
2097 sin->sin_addr.s_addr = t->saddr.a4;
2098 sin->sin_port = 0;
2099 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2100 sin++;
2101 sin->sin_family = AF_INET;
2102 sin->sin_addr.s_addr = t->id.daddr.a4;
2103 sin->sin_port = 0;
2104 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2105 break;
2106 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2107 case AF_INET6:
2108 sin6 = (void*)(rq+1);
2109 sin6->sin6_family = AF_INET6;
2110 sin6->sin6_port = 0;
2111 sin6->sin6_flowinfo = 0;
2112 memcpy(&sin6->sin6_addr, t->saddr.a6,
2113 sizeof(struct in6_addr));
2114 sin6->sin6_scope_id = 0;
2115
2116 sin6++;
2117 sin6->sin6_family = AF_INET6;
2118 sin6->sin6_port = 0;
2119 sin6->sin6_flowinfo = 0;
2120 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2121 sizeof(struct in6_addr));
2122 sin6->sin6_scope_id = 0;
2123 break;
2124 #endif
2125 default:
2126 break;
2127 }
2128 }
2129 }
2130
2131 /* security context */
2132 if ((xfrm_ctx = xp->security)) {
2133 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2134
2135 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2136 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2137 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2138 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2139 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2140 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2141 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2142 xfrm_ctx->ctx_len);
2143 }
2144
2145 hdr->sadb_msg_len = size / sizeof(uint64_t);
2146 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2147
2148 return 0;
2149 }
2150
2151 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2152 {
2153 struct sk_buff *out_skb;
2154 struct sadb_msg *out_hdr;
2155 int err;
2156
2157 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2158 if (IS_ERR(out_skb)) {
2159 err = PTR_ERR(out_skb);
2160 goto out;
2161 }
2162 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2163 if (err < 0)
2164 return err;
2165
2166 out_hdr = (struct sadb_msg *) out_skb->data;
2167 out_hdr->sadb_msg_version = PF_KEY_V2;
2168
2169 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2170 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2171 else
2172 out_hdr->sadb_msg_type = event2poltype(c->event);
2173 out_hdr->sadb_msg_errno = 0;
2174 out_hdr->sadb_msg_seq = c->seq;
2175 out_hdr->sadb_msg_pid = c->pid;
2176 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2177 out:
2178 return 0;
2179
2180 }
2181
2182 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2183 {
2184 int err = 0;
2185 struct sadb_lifetime *lifetime;
2186 struct sadb_address *sa;
2187 struct sadb_x_policy *pol;
2188 struct xfrm_policy *xp;
2189 struct km_event c;
2190 struct sadb_x_sec_ctx *sec_ctx;
2191
2192 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2193 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2194 !ext_hdrs[SADB_X_EXT_POLICY-1])
2195 return -EINVAL;
2196
2197 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2198 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2199 return -EINVAL;
2200 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2201 return -EINVAL;
2202
2203 xp = xfrm_policy_alloc(GFP_KERNEL);
2204 if (xp == NULL)
2205 return -ENOBUFS;
2206
2207 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2208 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2209 xp->priority = pol->sadb_x_policy_priority;
2210
2211 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2212 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2213 if (!xp->family) {
2214 err = -EINVAL;
2215 goto out;
2216 }
2217 xp->selector.family = xp->family;
2218 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2219 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2220 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2221 if (xp->selector.sport)
2222 xp->selector.sport_mask = htons(0xffff);
2223
2224 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2225 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2226 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2227
2228 /* Amusing, we set this twice. KAME apps appear to set same value
2229 * in both addresses.
2230 */
2231 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2232
2233 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2234 if (xp->selector.dport)
2235 xp->selector.dport_mask = htons(0xffff);
2236
2237 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2238 if (sec_ctx != NULL) {
2239 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2240
2241 if (!uctx) {
2242 err = -ENOBUFS;
2243 goto out;
2244 }
2245
2246 err = security_xfrm_policy_alloc(xp, uctx);
2247 kfree(uctx);
2248
2249 if (err)
2250 goto out;
2251 }
2252
2253 xp->lft.soft_byte_limit = XFRM_INF;
2254 xp->lft.hard_byte_limit = XFRM_INF;
2255 xp->lft.soft_packet_limit = XFRM_INF;
2256 xp->lft.hard_packet_limit = XFRM_INF;
2257 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2258 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2259 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2260 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2261 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2262 }
2263 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2264 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2265 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2266 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2267 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2268 }
2269 xp->xfrm_nr = 0;
2270 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2271 (err = parse_ipsecrequests(xp, pol)) < 0)
2272 goto out;
2273
2274 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2275 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2276
2277 xfrm_audit_policy_add(xp, err ? 0 : 1,
2278 audit_get_loginuid(current->audit_context), 0);
2279
2280 if (err)
2281 goto out;
2282
2283 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2284 c.event = XFRM_MSG_UPDPOLICY;
2285 else
2286 c.event = XFRM_MSG_NEWPOLICY;
2287
2288 c.seq = hdr->sadb_msg_seq;
2289 c.pid = hdr->sadb_msg_pid;
2290
2291 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2292 xfrm_pol_put(xp);
2293 return 0;
2294
2295 out:
2296 security_xfrm_policy_free(xp);
2297 kfree(xp);
2298 return err;
2299 }
2300
2301 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2302 {
2303 int err;
2304 struct sadb_address *sa;
2305 struct sadb_x_policy *pol;
2306 struct xfrm_policy *xp, tmp;
2307 struct xfrm_selector sel;
2308 struct km_event c;
2309 struct sadb_x_sec_ctx *sec_ctx;
2310
2311 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2312 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2313 !ext_hdrs[SADB_X_EXT_POLICY-1])
2314 return -EINVAL;
2315
2316 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2317 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2318 return -EINVAL;
2319
2320 memset(&sel, 0, sizeof(sel));
2321
2322 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2323 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2324 sel.prefixlen_s = sa->sadb_address_prefixlen;
2325 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2326 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2327 if (sel.sport)
2328 sel.sport_mask = htons(0xffff);
2329
2330 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2331 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2332 sel.prefixlen_d = sa->sadb_address_prefixlen;
2333 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2334 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2335 if (sel.dport)
2336 sel.dport_mask = htons(0xffff);
2337
2338 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2339 memset(&tmp, 0, sizeof(struct xfrm_policy));
2340
2341 if (sec_ctx != NULL) {
2342 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2343
2344 if (!uctx)
2345 return -ENOMEM;
2346
2347 err = security_xfrm_policy_alloc(&tmp, uctx);
2348 kfree(uctx);
2349
2350 if (err)
2351 return err;
2352 }
2353
2354 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2355 &sel, tmp.security, 1, &err);
2356 security_xfrm_policy_free(&tmp);
2357
2358 if (xp == NULL)
2359 return -ENOENT;
2360
2361 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2362 audit_get_loginuid(current->audit_context), 0);
2363
2364 if (err)
2365 goto out;
2366
2367 c.seq = hdr->sadb_msg_seq;
2368 c.pid = hdr->sadb_msg_pid;
2369 c.event = XFRM_MSG_DELPOLICY;
2370 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2371
2372 out:
2373 xfrm_pol_put(xp);
2374 return err;
2375 }
2376
2377 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2378 {
2379 int err;
2380 struct sk_buff *out_skb;
2381 struct sadb_msg *out_hdr;
2382 err = 0;
2383
2384 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2385 if (IS_ERR(out_skb)) {
2386 err = PTR_ERR(out_skb);
2387 goto out;
2388 }
2389 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2390 if (err < 0)
2391 goto out;
2392
2393 out_hdr = (struct sadb_msg *) out_skb->data;
2394 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2395 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2396 out_hdr->sadb_msg_satype = 0;
2397 out_hdr->sadb_msg_errno = 0;
2398 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2399 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2400 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2401 err = 0;
2402
2403 out:
2404 return err;
2405 }
2406
2407 #ifdef CONFIG_NET_KEY_MIGRATE
2408 static int pfkey_sockaddr_pair_size(sa_family_t family)
2409 {
2410 switch (family) {
2411 case AF_INET:
2412 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2413 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2414 case AF_INET6:
2415 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2416 #endif
2417 default:
2418 return 0;
2419 }
2420 /* NOTREACHED */
2421 }
2422
2423 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2424 xfrm_address_t *saddr, xfrm_address_t *daddr,
2425 u16 *family)
2426 {
2427 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2428 if (rq->sadb_x_ipsecrequest_len <
2429 pfkey_sockaddr_pair_size(sa->sa_family))
2430 return -EINVAL;
2431
2432 switch (sa->sa_family) {
2433 case AF_INET:
2434 {
2435 struct sockaddr_in *sin;
2436 sin = (struct sockaddr_in *)sa;
2437 if ((sin+1)->sin_family != AF_INET)
2438 return -EINVAL;
2439 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2440 sin++;
2441 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2442 *family = AF_INET;
2443 break;
2444 }
2445 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2446 case AF_INET6:
2447 {
2448 struct sockaddr_in6 *sin6;
2449 sin6 = (struct sockaddr_in6 *)sa;
2450 if ((sin6+1)->sin6_family != AF_INET6)
2451 return -EINVAL;
2452 memcpy(&saddr->a6, &sin6->sin6_addr,
2453 sizeof(saddr->a6));
2454 sin6++;
2455 memcpy(&daddr->a6, &sin6->sin6_addr,
2456 sizeof(daddr->a6));
2457 *family = AF_INET6;
2458 break;
2459 }
2460 #endif
2461 default:
2462 return -EINVAL;
2463 }
2464
2465 return 0;
2466 }
2467
2468 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2469 struct xfrm_migrate *m)
2470 {
2471 int err;
2472 struct sadb_x_ipsecrequest *rq2;
2473 int mode;
2474
2475 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2476 len < rq1->sadb_x_ipsecrequest_len)
2477 return -EINVAL;
2478
2479 /* old endoints */
2480 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2481 &m->old_family);
2482 if (err)
2483 return err;
2484
2485 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2486 len -= rq1->sadb_x_ipsecrequest_len;
2487
2488 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2489 len < rq2->sadb_x_ipsecrequest_len)
2490 return -EINVAL;
2491
2492 /* new endpoints */
2493 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2494 &m->new_family);
2495 if (err)
2496 return err;
2497
2498 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2499 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2500 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2501 return -EINVAL;
2502
2503 m->proto = rq1->sadb_x_ipsecrequest_proto;
2504 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2505 return -EINVAL;
2506 m->mode = mode;
2507 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2508
2509 return ((int)(rq1->sadb_x_ipsecrequest_len +
2510 rq2->sadb_x_ipsecrequest_len));
2511 }
2512
2513 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2514 struct sadb_msg *hdr, void **ext_hdrs)
2515 {
2516 int i, len, ret, err = -EINVAL;
2517 u8 dir;
2518 struct sadb_address *sa;
2519 struct sadb_x_policy *pol;
2520 struct sadb_x_ipsecrequest *rq;
2521 struct xfrm_selector sel;
2522 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2523
2524 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2525 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2526 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2527 err = -EINVAL;
2528 goto out;
2529 }
2530
2531 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2532 if (!pol) {
2533 err = -EINVAL;
2534 goto out;
2535 }
2536
2537 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2538 err = -EINVAL;
2539 goto out;
2540 }
2541
2542 dir = pol->sadb_x_policy_dir - 1;
2543 memset(&sel, 0, sizeof(sel));
2544
2545 /* set source address info of selector */
2546 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2547 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2548 sel.prefixlen_s = sa->sadb_address_prefixlen;
2549 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2550 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2551 if (sel.sport)
2552 sel.sport_mask = htons(0xffff);
2553
2554 /* set destination address info of selector */
2555 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2556 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2557 sel.prefixlen_d = sa->sadb_address_prefixlen;
2558 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2559 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2560 if (sel.dport)
2561 sel.dport_mask = htons(0xffff);
2562
2563 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2564
2565 /* extract ipsecrequests */
2566 i = 0;
2567 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2568
2569 while (len > 0 && i < XFRM_MAX_DEPTH) {
2570 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2571 if (ret < 0) {
2572 err = ret;
2573 goto out;
2574 } else {
2575 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2576 len -= ret;
2577 i++;
2578 }
2579 }
2580
2581 if (!i || len > 0) {
2582 err = -EINVAL;
2583 goto out;
2584 }
2585
2586 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2587
2588 out:
2589 return err;
2590 }
2591 #else
2592 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2593 struct sadb_msg *hdr, void **ext_hdrs)
2594 {
2595 return -ENOPROTOOPT;
2596 }
2597 #endif
2598
2599
2600 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2601 {
2602 unsigned int dir;
2603 int err = 0, delete;
2604 struct sadb_x_policy *pol;
2605 struct xfrm_policy *xp;
2606 struct km_event c;
2607
2608 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2609 return -EINVAL;
2610
2611 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2612 if (dir >= XFRM_POLICY_MAX)
2613 return -EINVAL;
2614
2615 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2616 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2617 delete, &err);
2618 if (xp == NULL)
2619 return -ENOENT;
2620
2621 if (delete) {
2622 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2623 audit_get_loginuid(current->audit_context), 0);
2624
2625 if (err)
2626 goto out;
2627 c.seq = hdr->sadb_msg_seq;
2628 c.pid = hdr->sadb_msg_pid;
2629 c.data.byid = 1;
2630 c.event = XFRM_MSG_DELPOLICY;
2631 km_policy_notify(xp, dir, &c);
2632 } else {
2633 err = key_pol_get_resp(sk, xp, hdr, dir);
2634 }
2635
2636 out:
2637 xfrm_pol_put(xp);
2638 return err;
2639 }
2640
2641 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2642 {
2643 struct pfkey_dump_data *data = ptr;
2644 struct sk_buff *out_skb;
2645 struct sadb_msg *out_hdr;
2646 int err;
2647
2648 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2649 if (IS_ERR(out_skb))
2650 return PTR_ERR(out_skb);
2651
2652 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2653 if (err < 0)
2654 return err;
2655
2656 out_hdr = (struct sadb_msg *) out_skb->data;
2657 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2658 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2659 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2660 out_hdr->sadb_msg_errno = 0;
2661 out_hdr->sadb_msg_seq = count;
2662 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2663 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2664 return 0;
2665 }
2666
2667 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2668 {
2669 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2670
2671 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2672 }
2673
2674 static int key_notify_policy_flush(struct km_event *c)
2675 {
2676 struct sk_buff *skb_out;
2677 struct sadb_msg *hdr;
2678
2679 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2680 if (!skb_out)
2681 return -ENOBUFS;
2682 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2683 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2684 hdr->sadb_msg_seq = c->seq;
2685 hdr->sadb_msg_pid = c->pid;
2686 hdr->sadb_msg_version = PF_KEY_V2;
2687 hdr->sadb_msg_errno = (uint8_t) 0;
2688 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2689 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2690 return 0;
2691
2692 }
2693
2694 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2695 {
2696 struct km_event c;
2697 struct xfrm_audit audit_info;
2698 int err;
2699
2700 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2701 audit_info.secid = 0;
2702 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2703 if (err)
2704 return err;
2705 c.data.type = XFRM_POLICY_TYPE_MAIN;
2706 c.event = XFRM_MSG_FLUSHPOLICY;
2707 c.pid = hdr->sadb_msg_pid;
2708 c.seq = hdr->sadb_msg_seq;
2709 km_policy_notify(NULL, 0, &c);
2710
2711 return 0;
2712 }
2713
2714 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2715 struct sadb_msg *hdr, void **ext_hdrs);
2716 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2717 [SADB_RESERVED] = pfkey_reserved,
2718 [SADB_GETSPI] = pfkey_getspi,
2719 [SADB_UPDATE] = pfkey_add,
2720 [SADB_ADD] = pfkey_add,
2721 [SADB_DELETE] = pfkey_delete,
2722 [SADB_GET] = pfkey_get,
2723 [SADB_ACQUIRE] = pfkey_acquire,
2724 [SADB_REGISTER] = pfkey_register,
2725 [SADB_EXPIRE] = NULL,
2726 [SADB_FLUSH] = pfkey_flush,
2727 [SADB_DUMP] = pfkey_dump,
2728 [SADB_X_PROMISC] = pfkey_promisc,
2729 [SADB_X_PCHANGE] = NULL,
2730 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2731 [SADB_X_SPDADD] = pfkey_spdadd,
2732 [SADB_X_SPDDELETE] = pfkey_spddelete,
2733 [SADB_X_SPDGET] = pfkey_spdget,
2734 [SADB_X_SPDACQUIRE] = NULL,
2735 [SADB_X_SPDDUMP] = pfkey_spddump,
2736 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2737 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2738 [SADB_X_SPDDELETE2] = pfkey_spdget,
2739 [SADB_X_MIGRATE] = pfkey_migrate,
2740 };
2741
2742 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2743 {
2744 void *ext_hdrs[SADB_EXT_MAX];
2745 int err;
2746
2747 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2748 BROADCAST_PROMISC_ONLY, NULL);
2749
2750 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2751 err = parse_exthdrs(skb, hdr, ext_hdrs);
2752 if (!err) {
2753 err = -EOPNOTSUPP;
2754 if (pfkey_funcs[hdr->sadb_msg_type])
2755 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2756 }
2757 return err;
2758 }
2759
2760 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2761 {
2762 struct sadb_msg *hdr = NULL;
2763
2764 if (skb->len < sizeof(*hdr)) {
2765 *errp = -EMSGSIZE;
2766 } else {
2767 hdr = (struct sadb_msg *) skb->data;
2768 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2769 hdr->sadb_msg_reserved != 0 ||
2770 (hdr->sadb_msg_type <= SADB_RESERVED ||
2771 hdr->sadb_msg_type > SADB_MAX)) {
2772 hdr = NULL;
2773 *errp = -EINVAL;
2774 } else if (hdr->sadb_msg_len != (skb->len /
2775 sizeof(uint64_t)) ||
2776 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2777 sizeof(uint64_t))) {
2778 hdr = NULL;
2779 *errp = -EMSGSIZE;
2780 } else {
2781 *errp = 0;
2782 }
2783 }
2784 return hdr;
2785 }
2786
2787 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2788 {
2789 return t->aalgos & (1 << d->desc.sadb_alg_id);
2790 }
2791
2792 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2793 {
2794 return t->ealgos & (1 << d->desc.sadb_alg_id);
2795 }
2796
2797 static int count_ah_combs(struct xfrm_tmpl *t)
2798 {
2799 int i, sz = 0;
2800
2801 for (i = 0; ; i++) {
2802 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2803 if (!aalg)
2804 break;
2805 if (aalg_tmpl_set(t, aalg) && aalg->available)
2806 sz += sizeof(struct sadb_comb);
2807 }
2808 return sz + sizeof(struct sadb_prop);
2809 }
2810
2811 static int count_esp_combs(struct xfrm_tmpl *t)
2812 {
2813 int i, k, sz = 0;
2814
2815 for (i = 0; ; i++) {
2816 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2817 if (!ealg)
2818 break;
2819
2820 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2821 continue;
2822
2823 for (k = 1; ; k++) {
2824 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2825 if (!aalg)
2826 break;
2827
2828 if (aalg_tmpl_set(t, aalg) && aalg->available)
2829 sz += sizeof(struct sadb_comb);
2830 }
2831 }
2832 return sz + sizeof(struct sadb_prop);
2833 }
2834
2835 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2836 {
2837 struct sadb_prop *p;
2838 int i;
2839
2840 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2841 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2842 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2843 p->sadb_prop_replay = 32;
2844 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2845
2846 for (i = 0; ; i++) {
2847 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2848 if (!aalg)
2849 break;
2850
2851 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2852 struct sadb_comb *c;
2853 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2854 memset(c, 0, sizeof(*c));
2855 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2856 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2857 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2858 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2859 c->sadb_comb_hard_addtime = 24*60*60;
2860 c->sadb_comb_soft_addtime = 20*60*60;
2861 c->sadb_comb_hard_usetime = 8*60*60;
2862 c->sadb_comb_soft_usetime = 7*60*60;
2863 }
2864 }
2865 }
2866
2867 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2868 {
2869 struct sadb_prop *p;
2870 int i, k;
2871
2872 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2873 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2874 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2875 p->sadb_prop_replay = 32;
2876 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2877
2878 for (i=0; ; i++) {
2879 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2880 if (!ealg)
2881 break;
2882
2883 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2884 continue;
2885
2886 for (k = 1; ; k++) {
2887 struct sadb_comb *c;
2888 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2889 if (!aalg)
2890 break;
2891 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2892 continue;
2893 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2894 memset(c, 0, sizeof(*c));
2895 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2896 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2897 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2898 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2899 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2900 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2901 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2902 c->sadb_comb_hard_addtime = 24*60*60;
2903 c->sadb_comb_soft_addtime = 20*60*60;
2904 c->sadb_comb_hard_usetime = 8*60*60;
2905 c->sadb_comb_soft_usetime = 7*60*60;
2906 }
2907 }
2908 }
2909
2910 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2911 {
2912 return 0;
2913 }
2914
2915 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2916 {
2917 struct sk_buff *out_skb;
2918 struct sadb_msg *out_hdr;
2919 int hard;
2920 int hsc;
2921
2922 hard = c->data.hard;
2923 if (hard)
2924 hsc = 2;
2925 else
2926 hsc = 1;
2927
2928 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2929 if (IS_ERR(out_skb))
2930 return PTR_ERR(out_skb);
2931
2932 out_hdr = (struct sadb_msg *) out_skb->data;
2933 out_hdr->sadb_msg_version = PF_KEY_V2;
2934 out_hdr->sadb_msg_type = SADB_EXPIRE;
2935 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2936 out_hdr->sadb_msg_errno = 0;
2937 out_hdr->sadb_msg_reserved = 0;
2938 out_hdr->sadb_msg_seq = 0;
2939 out_hdr->sadb_msg_pid = 0;
2940
2941 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2942 return 0;
2943 }
2944
2945 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2946 {
2947 switch (c->event) {
2948 case XFRM_MSG_EXPIRE:
2949 return key_notify_sa_expire(x, c);
2950 case XFRM_MSG_DELSA:
2951 case XFRM_MSG_NEWSA:
2952 case XFRM_MSG_UPDSA:
2953 return key_notify_sa(x, c);
2954 case XFRM_MSG_FLUSHSA:
2955 return key_notify_sa_flush(c);
2956 case XFRM_MSG_NEWAE: /* not yet supported */
2957 break;
2958 default:
2959 printk("pfkey: Unknown SA event %d\n", c->event);
2960 break;
2961 }
2962
2963 return 0;
2964 }
2965
2966 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2967 {
2968 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2969 return 0;
2970
2971 switch (c->event) {
2972 case XFRM_MSG_POLEXPIRE:
2973 return key_notify_policy_expire(xp, c);
2974 case XFRM_MSG_DELPOLICY:
2975 case XFRM_MSG_NEWPOLICY:
2976 case XFRM_MSG_UPDPOLICY:
2977 return key_notify_policy(xp, dir, c);
2978 case XFRM_MSG_FLUSHPOLICY:
2979 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2980 break;
2981 return key_notify_policy_flush(c);
2982 default:
2983 printk("pfkey: Unknown policy event %d\n", c->event);
2984 break;
2985 }
2986
2987 return 0;
2988 }
2989
2990 static u32 get_acqseq(void)
2991 {
2992 u32 res;
2993 static u32 acqseq;
2994 static DEFINE_SPINLOCK(acqseq_lock);
2995
2996 spin_lock_bh(&acqseq_lock);
2997 res = (++acqseq ? : ++acqseq);
2998 spin_unlock_bh(&acqseq_lock);
2999 return res;
3000 }
3001
3002 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3003 {
3004 struct sk_buff *skb;
3005 struct sadb_msg *hdr;
3006 struct sadb_address *addr;
3007 struct sadb_x_policy *pol;
3008 struct sockaddr_in *sin;
3009 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3010 struct sockaddr_in6 *sin6;
3011 #endif
3012 int sockaddr_size;
3013 int size;
3014 struct sadb_x_sec_ctx *sec_ctx;
3015 struct xfrm_sec_ctx *xfrm_ctx;
3016 int ctx_size = 0;
3017
3018 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3019 if (!sockaddr_size)
3020 return -EINVAL;
3021
3022 size = sizeof(struct sadb_msg) +
3023 (sizeof(struct sadb_address) * 2) +
3024 (sockaddr_size * 2) +
3025 sizeof(struct sadb_x_policy);
3026
3027 if (x->id.proto == IPPROTO_AH)
3028 size += count_ah_combs(t);
3029 else if (x->id.proto == IPPROTO_ESP)
3030 size += count_esp_combs(t);
3031
3032 if ((xfrm_ctx = x->security)) {
3033 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3034 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3035 }
3036
3037 skb = alloc_skb(size + 16, GFP_ATOMIC);
3038 if (skb == NULL)
3039 return -ENOMEM;
3040
3041 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3042 hdr->sadb_msg_version = PF_KEY_V2;
3043 hdr->sadb_msg_type = SADB_ACQUIRE;
3044 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3045 hdr->sadb_msg_len = size / sizeof(uint64_t);
3046 hdr->sadb_msg_errno = 0;
3047 hdr->sadb_msg_reserved = 0;
3048 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3049 hdr->sadb_msg_pid = 0;
3050
3051 /* src address */
3052 addr = (struct sadb_address*) skb_put(skb,
3053 sizeof(struct sadb_address)+sockaddr_size);
3054 addr->sadb_address_len =
3055 (sizeof(struct sadb_address)+sockaddr_size)/
3056 sizeof(uint64_t);
3057 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3058 addr->sadb_address_proto = 0;
3059 addr->sadb_address_reserved = 0;
3060 if (x->props.family == AF_INET) {
3061 addr->sadb_address_prefixlen = 32;
3062
3063 sin = (struct sockaddr_in *) (addr + 1);
3064 sin->sin_family = AF_INET;
3065 sin->sin_addr.s_addr = x->props.saddr.a4;
3066 sin->sin_port = 0;
3067 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3068 }
3069 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3070 else if (x->props.family == AF_INET6) {
3071 addr->sadb_address_prefixlen = 128;
3072
3073 sin6 = (struct sockaddr_in6 *) (addr + 1);
3074 sin6->sin6_family = AF_INET6;
3075 sin6->sin6_port = 0;
3076 sin6->sin6_flowinfo = 0;
3077 memcpy(&sin6->sin6_addr,
3078 x->props.saddr.a6, sizeof(struct in6_addr));
3079 sin6->sin6_scope_id = 0;
3080 }
3081 #endif
3082 else
3083 BUG();
3084
3085 /* dst address */
3086 addr = (struct sadb_address*) skb_put(skb,
3087 sizeof(struct sadb_address)+sockaddr_size);
3088 addr->sadb_address_len =
3089 (sizeof(struct sadb_address)+sockaddr_size)/
3090 sizeof(uint64_t);
3091 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3092 addr->sadb_address_proto = 0;
3093 addr->sadb_address_reserved = 0;
3094 if (x->props.family == AF_INET) {
3095 addr->sadb_address_prefixlen = 32;
3096
3097 sin = (struct sockaddr_in *) (addr + 1);
3098 sin->sin_family = AF_INET;
3099 sin->sin_addr.s_addr = x->id.daddr.a4;
3100 sin->sin_port = 0;
3101 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3102 }
3103 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3104 else if (x->props.family == AF_INET6) {
3105 addr->sadb_address_prefixlen = 128;
3106
3107 sin6 = (struct sockaddr_in6 *) (addr + 1);
3108 sin6->sin6_family = AF_INET6;
3109 sin6->sin6_port = 0;
3110 sin6->sin6_flowinfo = 0;
3111 memcpy(&sin6->sin6_addr,
3112 x->id.daddr.a6, sizeof(struct in6_addr));
3113 sin6->sin6_scope_id = 0;
3114 }
3115 #endif
3116 else
3117 BUG();
3118
3119 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3120 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3121 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3122 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3123 pol->sadb_x_policy_dir = dir+1;
3124 pol->sadb_x_policy_id = xp->index;
3125
3126 /* Set sadb_comb's. */
3127 if (x->id.proto == IPPROTO_AH)
3128 dump_ah_combs(skb, t);
3129 else if (x->id.proto == IPPROTO_ESP)
3130 dump_esp_combs(skb, t);
3131
3132 /* security context */
3133 if (xfrm_ctx) {
3134 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3135 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3136 sec_ctx->sadb_x_sec_len =
3137 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3138 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3139 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3140 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3141 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3142 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3143 xfrm_ctx->ctx_len);
3144 }
3145
3146 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3147 }
3148
3149 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3150 u8 *data, int len, int *dir)
3151 {
3152 struct xfrm_policy *xp;
3153 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3154 struct sadb_x_sec_ctx *sec_ctx;
3155
3156 switch (sk->sk_family) {
3157 case AF_INET:
3158 if (opt != IP_IPSEC_POLICY) {
3159 *dir = -EOPNOTSUPP;
3160 return NULL;
3161 }
3162 break;
3163 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3164 case AF_INET6:
3165 if (opt != IPV6_IPSEC_POLICY) {
3166 *dir = -EOPNOTSUPP;
3167 return NULL;
3168 }
3169 break;
3170 #endif
3171 default:
3172 *dir = -EINVAL;
3173 return NULL;
3174 }
3175
3176 *dir = -EINVAL;
3177
3178 if (len < sizeof(struct sadb_x_policy) ||
3179 pol->sadb_x_policy_len*8 > len ||
3180 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3181 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3182 return NULL;
3183
3184 xp = xfrm_policy_alloc(GFP_ATOMIC);
3185 if (xp == NULL) {
3186 *dir = -ENOBUFS;
3187 return NULL;
3188 }
3189
3190 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3191 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3192
3193 xp->lft.soft_byte_limit = XFRM_INF;
3194 xp->lft.hard_byte_limit = XFRM_INF;
3195 xp->lft.soft_packet_limit = XFRM_INF;
3196 xp->lft.hard_packet_limit = XFRM_INF;
3197 xp->family = sk->sk_family;
3198
3199 xp->xfrm_nr = 0;
3200 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3201 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3202 goto out;
3203
3204 /* security context too */
3205 if (len >= (pol->sadb_x_policy_len*8 +
3206 sizeof(struct sadb_x_sec_ctx))) {
3207 char *p = (char *)pol;
3208 struct xfrm_user_sec_ctx *uctx;
3209
3210 p += pol->sadb_x_policy_len*8;
3211 sec_ctx = (struct sadb_x_sec_ctx *)p;
3212 if (len < pol->sadb_x_policy_len*8 +
3213 sec_ctx->sadb_x_sec_len) {
3214 *dir = -EINVAL;
3215 goto out;
3216 }
3217 if ((*dir = verify_sec_ctx_len(p)))
3218 goto out;
3219 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3220 *dir = security_xfrm_policy_alloc(xp, uctx);
3221 kfree(uctx);
3222
3223 if (*dir)
3224 goto out;
3225 }
3226
3227 *dir = pol->sadb_x_policy_dir-1;
3228 return xp;
3229
3230 out:
3231 security_xfrm_policy_free(xp);
3232 kfree(xp);
3233 return NULL;
3234 }
3235
3236 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3237 {
3238 struct sk_buff *skb;
3239 struct sadb_msg *hdr;
3240 struct sadb_sa *sa;
3241 struct sadb_address *addr;
3242 struct sadb_x_nat_t_port *n_port;
3243 struct sockaddr_in *sin;
3244 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3245 struct sockaddr_in6 *sin6;
3246 #endif
3247 int sockaddr_size;
3248 int size;
3249 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3250 struct xfrm_encap_tmpl *natt = NULL;
3251
3252 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3253 if (!sockaddr_size)
3254 return -EINVAL;
3255
3256 if (!satype)
3257 return -EINVAL;
3258
3259 if (!x->encap)
3260 return -EINVAL;
3261
3262 natt = x->encap;
3263
3264 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3265 *
3266 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3267 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3268 */
3269
3270 size = sizeof(struct sadb_msg) +
3271 sizeof(struct sadb_sa) +
3272 (sizeof(struct sadb_address) * 2) +
3273 (sockaddr_size * 2) +
3274 (sizeof(struct sadb_x_nat_t_port) * 2);
3275
3276 skb = alloc_skb(size + 16, GFP_ATOMIC);
3277 if (skb == NULL)
3278 return -ENOMEM;
3279
3280 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3281 hdr->sadb_msg_version = PF_KEY_V2;
3282 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3283 hdr->sadb_msg_satype = satype;
3284 hdr->sadb_msg_len = size / sizeof(uint64_t);
3285 hdr->sadb_msg_errno = 0;
3286 hdr->sadb_msg_reserved = 0;
3287 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3288 hdr->sadb_msg_pid = 0;
3289
3290 /* SA */
3291 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3292 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3293 sa->sadb_sa_exttype = SADB_EXT_SA;
3294 sa->sadb_sa_spi = x->id.spi;
3295 sa->sadb_sa_replay = 0;
3296 sa->sadb_sa_state = 0;
3297 sa->sadb_sa_auth = 0;
3298 sa->sadb_sa_encrypt = 0;
3299 sa->sadb_sa_flags = 0;
3300
3301 /* ADDRESS_SRC (old addr) */
3302 addr = (struct sadb_address*)
3303 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3304 addr->sadb_address_len =
3305 (sizeof(struct sadb_address)+sockaddr_size)/
3306 sizeof(uint64_t);
3307 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3308 addr->sadb_address_proto = 0;
3309 addr->sadb_address_reserved = 0;
3310 if (x->props.family == AF_INET) {
3311 addr->sadb_address_prefixlen = 32;
3312
3313 sin = (struct sockaddr_in *) (addr + 1);
3314 sin->sin_family = AF_INET;
3315 sin->sin_addr.s_addr = x->props.saddr.a4;
3316 sin->sin_port = 0;
3317 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3318 }
3319 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3320 else if (x->props.family == AF_INET6) {
3321 addr->sadb_address_prefixlen = 128;
3322
3323 sin6 = (struct sockaddr_in6 *) (addr + 1);
3324 sin6->sin6_family = AF_INET6;
3325 sin6->sin6_port = 0;
3326 sin6->sin6_flowinfo = 0;
3327 memcpy(&sin6->sin6_addr,
3328 x->props.saddr.a6, sizeof(struct in6_addr));
3329 sin6->sin6_scope_id = 0;
3330 }
3331 #endif
3332 else
3333 BUG();
3334
3335 /* NAT_T_SPORT (old port) */
3336 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3337 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3338 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3339 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3340 n_port->sadb_x_nat_t_port_reserved = 0;
3341
3342 /* ADDRESS_DST (new addr) */
3343 addr = (struct sadb_address*)
3344 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3345 addr->sadb_address_len =
3346 (sizeof(struct sadb_address)+sockaddr_size)/
3347 sizeof(uint64_t);
3348 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3349 addr->sadb_address_proto = 0;
3350 addr->sadb_address_reserved = 0;
3351 if (x->props.family == AF_INET) {
3352 addr->sadb_address_prefixlen = 32;
3353
3354 sin = (struct sockaddr_in *) (addr + 1);
3355 sin->sin_family = AF_INET;
3356 sin->sin_addr.s_addr = ipaddr->a4;
3357 sin->sin_port = 0;
3358 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3359 }
3360 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3361 else if (x->props.family == AF_INET6) {
3362 addr->sadb_address_prefixlen = 128;
3363
3364 sin6 = (struct sockaddr_in6 *) (addr + 1);
3365 sin6->sin6_family = AF_INET6;
3366 sin6->sin6_port = 0;
3367 sin6->sin6_flowinfo = 0;
3368 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3369 sin6->sin6_scope_id = 0;
3370 }
3371 #endif
3372 else
3373 BUG();
3374
3375 /* NAT_T_DPORT (new port) */
3376 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3377 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3378 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3379 n_port->sadb_x_nat_t_port_port = sport;
3380 n_port->sadb_x_nat_t_port_reserved = 0;
3381
3382 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3383 }
3384
3385 #ifdef CONFIG_NET_KEY_MIGRATE
3386 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3387 struct xfrm_selector *sel)
3388 {
3389 struct sadb_address *addr;
3390 struct sockaddr_in *sin;
3391 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3392 struct sockaddr_in6 *sin6;
3393 #endif
3394 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3395 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3396 addr->sadb_address_exttype = type;
3397 addr->sadb_address_proto = sel->proto;
3398 addr->sadb_address_reserved = 0;
3399
3400 switch (type) {
3401 case SADB_EXT_ADDRESS_SRC:
3402 if (sel->family == AF_INET) {
3403 addr->sadb_address_prefixlen = sel->prefixlen_s;
3404 sin = (struct sockaddr_in *)(addr + 1);
3405 sin->sin_family = AF_INET;
3406 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3407 sizeof(sin->sin_addr.s_addr));
3408 sin->sin_port = 0;
3409 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3410 }
3411 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3412 else if (sel->family == AF_INET6) {
3413 addr->sadb_address_prefixlen = sel->prefixlen_s;
3414 sin6 = (struct sockaddr_in6 *)(addr + 1);
3415 sin6->sin6_family = AF_INET6;
3416 sin6->sin6_port = 0;
3417 sin6->sin6_flowinfo = 0;
3418 sin6->sin6_scope_id = 0;
3419 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3420 sizeof(sin6->sin6_addr.s6_addr));
3421 }
3422 #endif
3423 break;
3424 case SADB_EXT_ADDRESS_DST:
3425 if (sel->family == AF_INET) {
3426 addr->sadb_address_prefixlen = sel->prefixlen_d;
3427 sin = (struct sockaddr_in *)(addr + 1);
3428 sin->sin_family = AF_INET;
3429 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3430 sizeof(sin->sin_addr.s_addr));
3431 sin->sin_port = 0;
3432 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3433 }
3434 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3435 else if (sel->family == AF_INET6) {
3436 addr->sadb_address_prefixlen = sel->prefixlen_d;
3437 sin6 = (struct sockaddr_in6 *)(addr + 1);
3438 sin6->sin6_family = AF_INET6;
3439 sin6->sin6_port = 0;
3440 sin6->sin6_flowinfo = 0;
3441 sin6->sin6_scope_id = 0;
3442 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3443 sizeof(sin6->sin6_addr.s6_addr));
3444 }
3445 #endif
3446 break;
3447 default:
3448 return -EINVAL;
3449 }
3450
3451 return 0;
3452 }
3453
3454 static int set_ipsecrequest(struct sk_buff *skb,
3455 uint8_t proto, uint8_t mode, int level,
3456 uint32_t reqid, uint8_t family,
3457 xfrm_address_t *src, xfrm_address_t *dst)
3458 {
3459 struct sadb_x_ipsecrequest *rq;
3460 struct sockaddr_in *sin;
3461 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3462 struct sockaddr_in6 *sin6;
3463 #endif
3464 int size_req;
3465
3466 size_req = sizeof(struct sadb_x_ipsecrequest) +
3467 pfkey_sockaddr_pair_size(family);
3468
3469 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3470 memset(rq, 0, size_req);
3471 rq->sadb_x_ipsecrequest_len = size_req;
3472 rq->sadb_x_ipsecrequest_proto = proto;
3473 rq->sadb_x_ipsecrequest_mode = mode;
3474 rq->sadb_x_ipsecrequest_level = level;
3475 rq->sadb_x_ipsecrequest_reqid = reqid;
3476
3477 switch (family) {
3478 case AF_INET:
3479 sin = (struct sockaddr_in *)(rq + 1);
3480 sin->sin_family = AF_INET;
3481 memcpy(&sin->sin_addr.s_addr, src,
3482 sizeof(sin->sin_addr.s_addr));
3483 sin++;
3484 sin->sin_family = AF_INET;
3485 memcpy(&sin->sin_addr.s_addr, dst,
3486 sizeof(sin->sin_addr.s_addr));
3487 break;
3488 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3489 case AF_INET6:
3490 sin6 = (struct sockaddr_in6 *)(rq + 1);
3491 sin6->sin6_family = AF_INET6;
3492 sin6->sin6_port = 0;
3493 sin6->sin6_flowinfo = 0;
3494 sin6->sin6_scope_id = 0;
3495 memcpy(&sin6->sin6_addr.s6_addr, src,
3496 sizeof(sin6->sin6_addr.s6_addr));
3497 sin6++;
3498 sin6->sin6_family = AF_INET6;
3499 sin6->sin6_port = 0;
3500 sin6->sin6_flowinfo = 0;
3501 sin6->sin6_scope_id = 0;
3502 memcpy(&sin6->sin6_addr.s6_addr, dst,
3503 sizeof(sin6->sin6_addr.s6_addr));
3504 break;
3505 #endif
3506 default:
3507 return -EINVAL;
3508 }
3509
3510 return 0;
3511 }
3512 #endif
3513
3514 #ifdef CONFIG_NET_KEY_MIGRATE
3515 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3516 struct xfrm_migrate *m, int num_bundles)
3517 {
3518 int i;
3519 int sasize_sel;
3520 int size = 0;
3521 int size_pol = 0;
3522 struct sk_buff *skb;
3523 struct sadb_msg *hdr;
3524 struct sadb_x_policy *pol;
3525 struct xfrm_migrate *mp;
3526
3527 if (type != XFRM_POLICY_TYPE_MAIN)
3528 return 0;
3529
3530 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3531 return -EINVAL;
3532
3533 /* selector */
3534 sasize_sel = pfkey_sockaddr_size(sel->family);
3535 if (!sasize_sel)
3536 return -EINVAL;
3537 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3538
3539 /* policy info */
3540 size_pol += sizeof(struct sadb_x_policy);
3541
3542 /* ipsecrequests */
3543 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3544 /* old locator pair */
3545 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3546 pfkey_sockaddr_pair_size(mp->old_family);
3547 /* new locator pair */
3548 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3549 pfkey_sockaddr_pair_size(mp->new_family);
3550 }
3551
3552 size += sizeof(struct sadb_msg) + size_pol;
3553
3554 /* alloc buffer */
3555 skb = alloc_skb(size, GFP_ATOMIC);
3556 if (skb == NULL)
3557 return -ENOMEM;
3558
3559 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3560 hdr->sadb_msg_version = PF_KEY_V2;
3561 hdr->sadb_msg_type = SADB_X_MIGRATE;
3562 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3563 hdr->sadb_msg_len = size / 8;
3564 hdr->sadb_msg_errno = 0;
3565 hdr->sadb_msg_reserved = 0;
3566 hdr->sadb_msg_seq = 0;
3567 hdr->sadb_msg_pid = 0;
3568
3569 /* selector src */
3570 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3571
3572 /* selector dst */
3573 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3574
3575 /* policy information */
3576 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3577 pol->sadb_x_policy_len = size_pol / 8;
3578 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3579 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3580 pol->sadb_x_policy_dir = dir + 1;
3581 pol->sadb_x_policy_id = 0;
3582 pol->sadb_x_policy_priority = 0;
3583
3584 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3585 /* old ipsecrequest */
3586 int mode = pfkey_mode_from_xfrm(mp->mode);
3587 if (mode < 0)
3588 return -EINVAL;
3589 if (set_ipsecrequest(skb, mp->proto, mode,
3590 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3591 mp->reqid, mp->old_family,
3592 &mp->old_saddr, &mp->old_daddr) < 0) {
3593 return -EINVAL;
3594 }
3595
3596 /* new ipsecrequest */
3597 if (set_ipsecrequest(skb, mp->proto, mode,
3598 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3599 mp->reqid, mp->new_family,
3600 &mp->new_saddr, &mp->new_daddr) < 0) {
3601 return -EINVAL;
3602 }
3603 }
3604
3605 /* broadcast migrate message to sockets */
3606 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3607
3608 return 0;
3609 }
3610 #else
3611 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3612 struct xfrm_migrate *m, int num_bundles)
3613 {
3614 return -ENOPROTOOPT;
3615 }
3616 #endif
3617
3618 static int pfkey_sendmsg(struct kiocb *kiocb,
3619 struct socket *sock, struct msghdr *msg, size_t len)
3620 {
3621 struct sock *sk = sock->sk;
3622 struct sk_buff *skb = NULL;
3623 struct sadb_msg *hdr = NULL;
3624 int err;
3625
3626 err = -EOPNOTSUPP;
3627 if (msg->msg_flags & MSG_OOB)
3628 goto out;
3629
3630 err = -EMSGSIZE;
3631 if ((unsigned)len > sk->sk_sndbuf - 32)
3632 goto out;
3633
3634 err = -ENOBUFS;
3635 skb = alloc_skb(len, GFP_KERNEL);
3636 if (skb == NULL)
3637 goto out;
3638
3639 err = -EFAULT;
3640 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3641 goto out;
3642
3643 hdr = pfkey_get_base_msg(skb, &err);
3644 if (!hdr)
3645 goto out;
3646
3647 mutex_lock(&xfrm_cfg_mutex);
3648 err = pfkey_process(sk, skb, hdr);
3649 mutex_unlock(&xfrm_cfg_mutex);
3650
3651 out:
3652 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3653 err = 0;
3654 if (skb)
3655 kfree_skb(skb);
3656
3657 return err ? : len;
3658 }
3659
3660 static int pfkey_recvmsg(struct kiocb *kiocb,
3661 struct socket *sock, struct msghdr *msg, size_t len,
3662 int flags)
3663 {
3664 struct sock *sk = sock->sk;
3665 struct sk_buff *skb;
3666 int copied, err;
3667
3668 err = -EINVAL;
3669 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3670 goto out;
3671
3672 msg->msg_namelen = 0;
3673 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3674 if (skb == NULL)
3675 goto out;
3676
3677 copied = skb->len;
3678 if (copied > len) {
3679 msg->msg_flags |= MSG_TRUNC;
3680 copied = len;
3681 }
3682
3683 skb_reset_transport_header(skb);
3684 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3685 if (err)
3686 goto out_free;
3687
3688 sock_recv_timestamp(msg, sk, skb);
3689
3690 err = (flags & MSG_TRUNC) ? skb->len : copied;
3691
3692 out_free:
3693 skb_free_datagram(sk, skb);
3694 out:
3695 return err;
3696 }
3697
3698 static const struct proto_ops pfkey_ops = {
3699 .family = PF_KEY,
3700 .owner = THIS_MODULE,
3701 /* Operations that make no sense on pfkey sockets. */
3702 .bind = sock_no_bind,
3703 .connect = sock_no_connect,
3704 .socketpair = sock_no_socketpair,
3705 .accept = sock_no_accept,
3706 .getname = sock_no_getname,
3707 .ioctl = sock_no_ioctl,
3708 .listen = sock_no_listen,
3709 .shutdown = sock_no_shutdown,
3710 .setsockopt = sock_no_setsockopt,
3711 .getsockopt = sock_no_getsockopt,
3712 .mmap = sock_no_mmap,
3713 .sendpage = sock_no_sendpage,
3714
3715 /* Now the operations that really occur. */
3716 .release = pfkey_release,
3717 .poll = datagram_poll,
3718 .sendmsg = pfkey_sendmsg,
3719 .recvmsg = pfkey_recvmsg,
3720 };
3721
3722 static struct net_proto_family pfkey_family_ops = {
3723 .family = PF_KEY,
3724 .create = pfkey_create,
3725 .owner = THIS_MODULE,
3726 };
3727
3728 #ifdef CONFIG_PROC_FS
3729 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3730 int length, int *eof, void *data)
3731 {
3732 off_t pos = 0;
3733 off_t begin = 0;
3734 int len = 0;
3735 struct sock *s;
3736 struct hlist_node *node;
3737
3738 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3739
3740 read_lock(&pfkey_table_lock);
3741
3742 sk_for_each(s, node, &pfkey_table) {
3743 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3744 s,
3745 atomic_read(&s->sk_refcnt),
3746 atomic_read(&s->sk_rmem_alloc),
3747 atomic_read(&s->sk_wmem_alloc),
3748 sock_i_uid(s),
3749 sock_i_ino(s)
3750 );
3751
3752 buffer[len++] = '\n';
3753
3754 pos = begin + len;
3755 if (pos < offset) {
3756 len = 0;
3757 begin = pos;
3758 }
3759 if(pos > offset + length)
3760 goto done;
3761 }
3762 *eof = 1;
3763
3764 done:
3765 read_unlock(&pfkey_table_lock);
3766
3767 *start = buffer + (offset - begin);
3768 len -= (offset - begin);
3769
3770 if (len > length)
3771 len = length;
3772 if (len < 0)
3773 len = 0;
3774
3775 return len;
3776 }
3777 #endif
3778
3779 static struct xfrm_mgr pfkeyv2_mgr =
3780 {
3781 .id = "pfkeyv2",
3782 .notify = pfkey_send_notify,
3783 .acquire = pfkey_send_acquire,
3784 .compile_policy = pfkey_compile_policy,
3785 .new_mapping = pfkey_send_new_mapping,
3786 .notify_policy = pfkey_send_policy_notify,
3787 .migrate = pfkey_send_migrate,
3788 };
3789
3790 static void __exit ipsec_pfkey_exit(void)
3791 {
3792 xfrm_unregister_km(&pfkeyv2_mgr);
3793 remove_proc_entry("pfkey", init_net.proc_net);
3794 sock_unregister(PF_KEY);
3795 proto_unregister(&key_proto);
3796 }
3797
3798 static int __init ipsec_pfkey_init(void)
3799 {
3800 int err = proto_register(&key_proto, 0);
3801
3802 if (err != 0)
3803 goto out;
3804
3805 err = sock_register(&pfkey_family_ops);
3806 if (err != 0)
3807 goto out_unregister_key_proto;
3808 #ifdef CONFIG_PROC_FS
3809 err = -ENOMEM;
3810 if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
3811 goto out_sock_unregister;
3812 #endif
3813 err = xfrm_register_km(&pfkeyv2_mgr);
3814 if (err != 0)
3815 goto out_remove_proc_entry;
3816 out:
3817 return err;
3818 out_remove_proc_entry:
3819 #ifdef CONFIG_PROC_FS
3820 remove_proc_entry("net/pfkey", NULL);
3821 out_sock_unregister:
3822 #endif
3823 sock_unregister(PF_KEY);
3824 out_unregister_key_proto:
3825 proto_unregister(&key_proto);
3826 goto out;
3827 }
3828
3829 module_init(ipsec_pfkey_init);
3830 module_exit(ipsec_pfkey_exit);
3831 MODULE_LICENSE("GPL");
3832 MODULE_ALIAS_NETPROTO(PF_KEY);
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