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x86: 64-bit, add the new split_large_page() function
[wrt350n-kernel.git] / net / key / af_key.c
blob16b72b5570c303831aca6353d6a35b4ae901b473
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);
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 = sec_ctx->sadb_x_ctx_len;
399
400 if (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 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1019
1020 return skb;
1021 }
1022
1023 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1024 int hsc)
1025 {
1026 return __pfkey_xfrm_state2msg(x, 0, hsc);
1027 }
1028
1029 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1030 void **ext_hdrs)
1031 {
1032 struct xfrm_state *x;
1033 struct sadb_lifetime *lifetime;
1034 struct sadb_sa *sa;
1035 struct sadb_key *key;
1036 struct sadb_x_sec_ctx *sec_ctx;
1037 uint16_t proto;
1038 int err;
1039
1040
1041 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1042 if (!sa ||
1043 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1044 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1045 return ERR_PTR(-EINVAL);
1046 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1047 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1048 return ERR_PTR(-EINVAL);
1049 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1050 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1051 return ERR_PTR(-EINVAL);
1052 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1053 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1054 return ERR_PTR(-EINVAL);
1055
1056 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1057 if (proto == 0)
1058 return ERR_PTR(-EINVAL);
1059
1060 /* default error is no buffer space */
1061 err = -ENOBUFS;
1062
1063 /* RFC2367:
1064
1065 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1066 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1067 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1068 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1069 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1070 not true.
1071
1072 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1073 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1074 */
1075 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1076 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1077 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1078 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1079 return ERR_PTR(-EINVAL);
1080 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1081 if (key != NULL &&
1082 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1083 ((key->sadb_key_bits+7) / 8 == 0 ||
1084 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1085 return ERR_PTR(-EINVAL);
1086 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1087 if (key != NULL &&
1088 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1089 ((key->sadb_key_bits+7) / 8 == 0 ||
1090 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1091 return ERR_PTR(-EINVAL);
1092
1093 x = xfrm_state_alloc();
1094 if (x == NULL)
1095 return ERR_PTR(-ENOBUFS);
1096
1097 x->id.proto = proto;
1098 x->id.spi = sa->sadb_sa_spi;
1099 x->props.replay_window = sa->sadb_sa_replay;
1100 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1101 x->props.flags |= XFRM_STATE_NOECN;
1102 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1103 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1104 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1105 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1106
1107 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1108 if (lifetime != NULL) {
1109 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1110 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1111 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1112 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1113 }
1114 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1115 if (lifetime != NULL) {
1116 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1117 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1118 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1119 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1120 }
1121
1122 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1123 if (sec_ctx != NULL) {
1124 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1125
1126 if (!uctx)
1127 goto out;
1128
1129 err = security_xfrm_state_alloc(x, uctx);
1130 kfree(uctx);
1131
1132 if (err)
1133 goto out;
1134 }
1135
1136 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1137 if (sa->sadb_sa_auth) {
1138 int keysize = 0;
1139 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1140 if (!a) {
1141 err = -ENOSYS;
1142 goto out;
1143 }
1144 if (key)
1145 keysize = (key->sadb_key_bits + 7) / 8;
1146 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1147 if (!x->aalg)
1148 goto out;
1149 strcpy(x->aalg->alg_name, a->name);
1150 x->aalg->alg_key_len = 0;
1151 if (key) {
1152 x->aalg->alg_key_len = key->sadb_key_bits;
1153 memcpy(x->aalg->alg_key, key+1, keysize);
1154 }
1155 x->props.aalgo = sa->sadb_sa_auth;
1156 /* x->algo.flags = sa->sadb_sa_flags; */
1157 }
1158 if (sa->sadb_sa_encrypt) {
1159 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161 if (!a) {
1162 err = -ENOSYS;
1163 goto out;
1164 }
1165 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166 if (!x->calg)
1167 goto out;
1168 strcpy(x->calg->alg_name, a->name);
1169 x->props.calgo = sa->sadb_sa_encrypt;
1170 } else {
1171 int keysize = 0;
1172 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173 if (!a) {
1174 err = -ENOSYS;
1175 goto out;
1176 }
1177 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178 if (key)
1179 keysize = (key->sadb_key_bits + 7) / 8;
1180 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181 if (!x->ealg)
1182 goto out;
1183 strcpy(x->ealg->alg_name, a->name);
1184 x->ealg->alg_key_len = 0;
1185 if (key) {
1186 x->ealg->alg_key_len = key->sadb_key_bits;
1187 memcpy(x->ealg->alg_key, key+1, keysize);
1188 }
1189 x->props.ealgo = sa->sadb_sa_encrypt;
1190 }
1191 }
1192 /* x->algo.flags = sa->sadb_sa_flags; */
1193
1194 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1195 &x->props.saddr);
1196 if (!x->props.family) {
1197 err = -EAFNOSUPPORT;
1198 goto out;
1199 }
1200 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1201 &x->id.daddr);
1202
1203 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1205 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206 if (mode < 0) {
1207 err = -EINVAL;
1208 goto out;
1209 }
1210 x->props.mode = mode;
1211 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212 }
1213
1214 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216
1217 /* Nobody uses this, but we try. */
1218 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220 }
1221
1222 if (!x->sel.family)
1223 x->sel.family = x->props.family;
1224
1225 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226 struct sadb_x_nat_t_type* n_type;
1227 struct xfrm_encap_tmpl *natt;
1228
1229 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230 if (!x->encap)
1231 goto out;
1232
1233 natt = x->encap;
1234 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238 struct sadb_x_nat_t_port* n_port =
1239 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241 }
1242 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243 struct sadb_x_nat_t_port* n_port =
1244 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246 }
1247 }
1248
1249 err = xfrm_init_state(x);
1250 if (err)
1251 goto out;
1252
1253 x->km.seq = hdr->sadb_msg_seq;
1254 return x;
1255
1256 out:
1257 x->km.state = XFRM_STATE_DEAD;
1258 xfrm_state_put(x);
1259 return ERR_PTR(err);
1260 }
1261
1262 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1263 {
1264 return -EOPNOTSUPP;
1265 }
1266
1267 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1268 {
1269 struct sk_buff *resp_skb;
1270 struct sadb_x_sa2 *sa2;
1271 struct sadb_address *saddr, *daddr;
1272 struct sadb_msg *out_hdr;
1273 struct sadb_spirange *range;
1274 struct xfrm_state *x = NULL;
1275 int mode;
1276 int err;
1277 u32 min_spi, max_spi;
1278 u32 reqid;
1279 u8 proto;
1280 unsigned short family;
1281 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1282
1283 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1284 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1285 return -EINVAL;
1286
1287 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1288 if (proto == 0)
1289 return -EINVAL;
1290
1291 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1292 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1293 if (mode < 0)
1294 return -EINVAL;
1295 reqid = sa2->sadb_x_sa2_reqid;
1296 } else {
1297 mode = 0;
1298 reqid = 0;
1299 }
1300
1301 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1302 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1303
1304 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1305 switch (family) {
1306 case AF_INET:
1307 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1308 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1309 break;
1310 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1311 case AF_INET6:
1312 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1313 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1314 break;
1315 #endif
1316 }
1317
1318 if (hdr->sadb_msg_seq) {
1319 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1320 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1321 xfrm_state_put(x);
1322 x = NULL;
1323 }
1324 }
1325
1326 if (!x)
1327 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1328
1329 if (x == NULL)
1330 return -ENOENT;
1331
1332 min_spi = 0x100;
1333 max_spi = 0x0fffffff;
1334
1335 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1336 if (range) {
1337 min_spi = range->sadb_spirange_min;
1338 max_spi = range->sadb_spirange_max;
1339 }
1340
1341 err = xfrm_alloc_spi(x, min_spi, max_spi);
1342 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1343
1344 if (IS_ERR(resp_skb)) {
1345 xfrm_state_put(x);
1346 return PTR_ERR(resp_skb);
1347 }
1348
1349 out_hdr = (struct sadb_msg *) resp_skb->data;
1350 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1351 out_hdr->sadb_msg_type = SADB_GETSPI;
1352 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1353 out_hdr->sadb_msg_errno = 0;
1354 out_hdr->sadb_msg_reserved = 0;
1355 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1356 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1357
1358 xfrm_state_put(x);
1359
1360 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1361
1362 return 0;
1363 }
1364
1365 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1366 {
1367 struct xfrm_state *x;
1368
1369 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1370 return -EOPNOTSUPP;
1371
1372 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1373 return 0;
1374
1375 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1376 if (x == NULL)
1377 return 0;
1378
1379 spin_lock_bh(&x->lock);
1380 if (x->km.state == XFRM_STATE_ACQ) {
1381 x->km.state = XFRM_STATE_ERROR;
1382 wake_up(&km_waitq);
1383 }
1384 spin_unlock_bh(&x->lock);
1385 xfrm_state_put(x);
1386 return 0;
1387 }
1388
1389 static inline int event2poltype(int event)
1390 {
1391 switch (event) {
1392 case XFRM_MSG_DELPOLICY:
1393 return SADB_X_SPDDELETE;
1394 case XFRM_MSG_NEWPOLICY:
1395 return SADB_X_SPDADD;
1396 case XFRM_MSG_UPDPOLICY:
1397 return SADB_X_SPDUPDATE;
1398 case XFRM_MSG_POLEXPIRE:
1399 // return SADB_X_SPDEXPIRE;
1400 default:
1401 printk("pfkey: Unknown policy event %d\n", event);
1402 break;
1403 }
1404
1405 return 0;
1406 }
1407
1408 static inline int event2keytype(int event)
1409 {
1410 switch (event) {
1411 case XFRM_MSG_DELSA:
1412 return SADB_DELETE;
1413 case XFRM_MSG_NEWSA:
1414 return SADB_ADD;
1415 case XFRM_MSG_UPDSA:
1416 return SADB_UPDATE;
1417 case XFRM_MSG_EXPIRE:
1418 return SADB_EXPIRE;
1419 default:
1420 printk("pfkey: Unknown SA event %d\n", event);
1421 break;
1422 }
1423
1424 return 0;
1425 }
1426
1427 /* ADD/UPD/DEL */
1428 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1429 {
1430 struct sk_buff *skb;
1431 struct sadb_msg *hdr;
1432
1433 skb = pfkey_xfrm_state2msg(x);
1434
1435 if (IS_ERR(skb))
1436 return PTR_ERR(skb);
1437
1438 hdr = (struct sadb_msg *) skb->data;
1439 hdr->sadb_msg_version = PF_KEY_V2;
1440 hdr->sadb_msg_type = event2keytype(c->event);
1441 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1442 hdr->sadb_msg_errno = 0;
1443 hdr->sadb_msg_reserved = 0;
1444 hdr->sadb_msg_seq = c->seq;
1445 hdr->sadb_msg_pid = c->pid;
1446
1447 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1448
1449 return 0;
1450 }
1451
1452 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1453 {
1454 struct xfrm_state *x;
1455 int err;
1456 struct km_event c;
1457
1458 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1459 if (IS_ERR(x))
1460 return PTR_ERR(x);
1461
1462 xfrm_state_hold(x);
1463 if (hdr->sadb_msg_type == SADB_ADD)
1464 err = xfrm_state_add(x);
1465 else
1466 err = xfrm_state_update(x);
1467
1468 xfrm_audit_state_add(x, err ? 0 : 1,
1469 audit_get_loginuid(current->audit_context), 0);
1470
1471 if (err < 0) {
1472 x->km.state = XFRM_STATE_DEAD;
1473 __xfrm_state_put(x);
1474 goto out;
1475 }
1476
1477 if (hdr->sadb_msg_type == SADB_ADD)
1478 c.event = XFRM_MSG_NEWSA;
1479 else
1480 c.event = XFRM_MSG_UPDSA;
1481 c.seq = hdr->sadb_msg_seq;
1482 c.pid = hdr->sadb_msg_pid;
1483 km_state_notify(x, &c);
1484 out:
1485 xfrm_state_put(x);
1486 return err;
1487 }
1488
1489 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1490 {
1491 struct xfrm_state *x;
1492 struct km_event c;
1493 int err;
1494
1495 if (!ext_hdrs[SADB_EXT_SA-1] ||
1496 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1497 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1498 return -EINVAL;
1499
1500 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1501 if (x == NULL)
1502 return -ESRCH;
1503
1504 if ((err = security_xfrm_state_delete(x)))
1505 goto out;
1506
1507 if (xfrm_state_kern(x)) {
1508 err = -EPERM;
1509 goto out;
1510 }
1511
1512 err = xfrm_state_delete(x);
1513
1514 if (err < 0)
1515 goto out;
1516
1517 c.seq = hdr->sadb_msg_seq;
1518 c.pid = hdr->sadb_msg_pid;
1519 c.event = XFRM_MSG_DELSA;
1520 km_state_notify(x, &c);
1521 out:
1522 xfrm_audit_state_delete(x, err ? 0 : 1,
1523 audit_get_loginuid(current->audit_context), 0);
1524 xfrm_state_put(x);
1525
1526 return err;
1527 }
1528
1529 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1530 {
1531 __u8 proto;
1532 struct sk_buff *out_skb;
1533 struct sadb_msg *out_hdr;
1534 struct xfrm_state *x;
1535
1536 if (!ext_hdrs[SADB_EXT_SA-1] ||
1537 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539 return -EINVAL;
1540
1541 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542 if (x == NULL)
1543 return -ESRCH;
1544
1545 out_skb = pfkey_xfrm_state2msg(x);
1546 proto = x->id.proto;
1547 xfrm_state_put(x);
1548 if (IS_ERR(out_skb))
1549 return PTR_ERR(out_skb);
1550
1551 out_hdr = (struct sadb_msg *) out_skb->data;
1552 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1553 out_hdr->sadb_msg_type = SADB_GET;
1554 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1555 out_hdr->sadb_msg_errno = 0;
1556 out_hdr->sadb_msg_reserved = 0;
1557 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1558 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1559 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1560
1561 return 0;
1562 }
1563
1564 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1565 gfp_t allocation)
1566 {
1567 struct sk_buff *skb;
1568 struct sadb_msg *hdr;
1569 int len, auth_len, enc_len, i;
1570
1571 auth_len = xfrm_count_auth_supported();
1572 if (auth_len) {
1573 auth_len *= sizeof(struct sadb_alg);
1574 auth_len += sizeof(struct sadb_supported);
1575 }
1576
1577 enc_len = xfrm_count_enc_supported();
1578 if (enc_len) {
1579 enc_len *= sizeof(struct sadb_alg);
1580 enc_len += sizeof(struct sadb_supported);
1581 }
1582
1583 len = enc_len + auth_len + sizeof(struct sadb_msg);
1584
1585 skb = alloc_skb(len + 16, allocation);
1586 if (!skb)
1587 goto out_put_algs;
1588
1589 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1590 pfkey_hdr_dup(hdr, orig);
1591 hdr->sadb_msg_errno = 0;
1592 hdr->sadb_msg_len = len / sizeof(uint64_t);
1593
1594 if (auth_len) {
1595 struct sadb_supported *sp;
1596 struct sadb_alg *ap;
1597
1598 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1599 ap = (struct sadb_alg *) (sp + 1);
1600
1601 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1602 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1603
1604 for (i = 0; ; i++) {
1605 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1606 if (!aalg)
1607 break;
1608 if (aalg->available)
1609 *ap++ = aalg->desc;
1610 }
1611 }
1612
1613 if (enc_len) {
1614 struct sadb_supported *sp;
1615 struct sadb_alg *ap;
1616
1617 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1618 ap = (struct sadb_alg *) (sp + 1);
1619
1620 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1621 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1622
1623 for (i = 0; ; i++) {
1624 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1625 if (!ealg)
1626 break;
1627 if (ealg->available)
1628 *ap++ = ealg->desc;
1629 }
1630 }
1631
1632 out_put_algs:
1633 return skb;
1634 }
1635
1636 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637 {
1638 struct pfkey_sock *pfk = pfkey_sk(sk);
1639 struct sk_buff *supp_skb;
1640
1641 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1642 return -EINVAL;
1643
1644 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1645 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1646 return -EEXIST;
1647 pfk->registered |= (1<<hdr->sadb_msg_satype);
1648 }
1649
1650 xfrm_probe_algs();
1651
1652 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1653 if (!supp_skb) {
1654 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1655 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1656
1657 return -ENOBUFS;
1658 }
1659
1660 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1661
1662 return 0;
1663 }
1664
1665 static int key_notify_sa_flush(struct km_event *c)
1666 {
1667 struct sk_buff *skb;
1668 struct sadb_msg *hdr;
1669
1670 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1671 if (!skb)
1672 return -ENOBUFS;
1673 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1674 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1675 hdr->sadb_msg_type = SADB_FLUSH;
1676 hdr->sadb_msg_seq = c->seq;
1677 hdr->sadb_msg_pid = c->pid;
1678 hdr->sadb_msg_version = PF_KEY_V2;
1679 hdr->sadb_msg_errno = (uint8_t) 0;
1680 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1681
1682 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1683
1684 return 0;
1685 }
1686
1687 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1688 {
1689 unsigned proto;
1690 struct km_event c;
1691 struct xfrm_audit audit_info;
1692 int err;
1693
1694 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1695 if (proto == 0)
1696 return -EINVAL;
1697
1698 audit_info.loginuid = audit_get_loginuid(current->audit_context);
1699 audit_info.secid = 0;
1700 err = xfrm_state_flush(proto, &audit_info);
1701 if (err)
1702 return err;
1703 c.data.proto = proto;
1704 c.seq = hdr->sadb_msg_seq;
1705 c.pid = hdr->sadb_msg_pid;
1706 c.event = XFRM_MSG_FLUSHSA;
1707 km_state_notify(NULL, &c);
1708
1709 return 0;
1710 }
1711
1712 struct pfkey_dump_data
1713 {
1714 struct sk_buff *skb;
1715 struct sadb_msg *hdr;
1716 struct sock *sk;
1717 };
1718
1719 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1720 {
1721 struct pfkey_dump_data *data = ptr;
1722 struct sk_buff *out_skb;
1723 struct sadb_msg *out_hdr;
1724
1725 out_skb = pfkey_xfrm_state2msg(x);
1726 if (IS_ERR(out_skb))
1727 return PTR_ERR(out_skb);
1728
1729 out_hdr = (struct sadb_msg *) out_skb->data;
1730 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1731 out_hdr->sadb_msg_type = SADB_DUMP;
1732 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1733 out_hdr->sadb_msg_errno = 0;
1734 out_hdr->sadb_msg_reserved = 0;
1735 out_hdr->sadb_msg_seq = count;
1736 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1737 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1738 return 0;
1739 }
1740
1741 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1742 {
1743 u8 proto;
1744 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
1745
1746 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1747 if (proto == 0)
1748 return -EINVAL;
1749
1750 return xfrm_state_walk(proto, dump_sa, &data);
1751 }
1752
1753 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1754 {
1755 struct pfkey_sock *pfk = pfkey_sk(sk);
1756 int satype = hdr->sadb_msg_satype;
1757
1758 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1759 /* XXX we mangle packet... */
1760 hdr->sadb_msg_errno = 0;
1761 if (satype != 0 && satype != 1)
1762 return -EINVAL;
1763 pfk->promisc = satype;
1764 }
1765 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1766 return 0;
1767 }
1768
1769 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1770 {
1771 int i;
1772 u32 reqid = *(u32*)ptr;
1773
1774 for (i=0; i<xp->xfrm_nr; i++) {
1775 if (xp->xfrm_vec[i].reqid == reqid)
1776 return -EEXIST;
1777 }
1778 return 0;
1779 }
1780
1781 static u32 gen_reqid(void)
1782 {
1783 u32 start;
1784 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1785
1786 start = reqid;
1787 do {
1788 ++reqid;
1789 if (reqid == 0)
1790 reqid = IPSEC_MANUAL_REQID_MAX+1;
1791 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1792 (void*)&reqid) != -EEXIST)
1793 return reqid;
1794 } while (reqid != start);
1795 return 0;
1796 }
1797
1798 static int
1799 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1800 {
1801 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1802 struct sockaddr_in *sin;
1803 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1804 struct sockaddr_in6 *sin6;
1805 #endif
1806 int mode;
1807
1808 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1809 return -ELOOP;
1810
1811 if (rq->sadb_x_ipsecrequest_mode == 0)
1812 return -EINVAL;
1813
1814 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1815 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1816 return -EINVAL;
1817 t->mode = mode;
1818 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1819 t->optional = 1;
1820 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1821 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1822 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1823 t->reqid = 0;
1824 if (!t->reqid && !(t->reqid = gen_reqid()))
1825 return -ENOBUFS;
1826 }
1827
1828 /* addresses present only in tunnel mode */
1829 if (t->mode == XFRM_MODE_TUNNEL) {
1830 struct sockaddr *sa;
1831 sa = (struct sockaddr *)(rq+1);
1832 switch(sa->sa_family) {
1833 case AF_INET:
1834 sin = (struct sockaddr_in*)sa;
1835 t->saddr.a4 = sin->sin_addr.s_addr;
1836 sin++;
1837 if (sin->sin_family != AF_INET)
1838 return -EINVAL;
1839 t->id.daddr.a4 = sin->sin_addr.s_addr;
1840 break;
1841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1842 case AF_INET6:
1843 sin6 = (struct sockaddr_in6*)sa;
1844 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1845 sin6++;
1846 if (sin6->sin6_family != AF_INET6)
1847 return -EINVAL;
1848 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1849 break;
1850 #endif
1851 default:
1852 return -EINVAL;
1853 }
1854 t->encap_family = sa->sa_family;
1855 } else
1856 t->encap_family = xp->family;
1857
1858 /* No way to set this via kame pfkey */
1859 t->aalgos = t->ealgos = t->calgos = ~0;
1860 xp->xfrm_nr++;
1861 return 0;
1862 }
1863
1864 static int
1865 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1866 {
1867 int err;
1868 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1869 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1870
1871 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1872 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1873 return err;
1874 len -= rq->sadb_x_ipsecrequest_len;
1875 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1876 }
1877 return 0;
1878 }
1879
1880 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1881 {
1882 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1883
1884 if (xfrm_ctx) {
1885 int len = sizeof(struct sadb_x_sec_ctx);
1886 len += xfrm_ctx->ctx_len;
1887 return PFKEY_ALIGN8(len);
1888 }
1889 return 0;
1890 }
1891
1892 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1893 {
1894 struct xfrm_tmpl *t;
1895 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1896 int socklen = 0;
1897 int i;
1898
1899 for (i=0; i<xp->xfrm_nr; i++) {
1900 t = xp->xfrm_vec + i;
1901 socklen += (t->encap_family == AF_INET ?
1902 sizeof(struct sockaddr_in) :
1903 sizeof(struct sockaddr_in6));
1904 }
1905
1906 return sizeof(struct sadb_msg) +
1907 (sizeof(struct sadb_lifetime) * 3) +
1908 (sizeof(struct sadb_address) * 2) +
1909 (sockaddr_size * 2) +
1910 sizeof(struct sadb_x_policy) +
1911 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1912 (socklen * 2) +
1913 pfkey_xfrm_policy2sec_ctx_size(xp);
1914 }
1915
1916 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1917 {
1918 struct sk_buff *skb;
1919 int size;
1920
1921 size = pfkey_xfrm_policy2msg_size(xp);
1922
1923 skb = alloc_skb(size + 16, GFP_ATOMIC);
1924 if (skb == NULL)
1925 return ERR_PTR(-ENOBUFS);
1926
1927 return skb;
1928 }
1929
1930 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1931 {
1932 struct sadb_msg *hdr;
1933 struct sadb_address *addr;
1934 struct sadb_lifetime *lifetime;
1935 struct sadb_x_policy *pol;
1936 struct sockaddr_in *sin;
1937 struct sadb_x_sec_ctx *sec_ctx;
1938 struct xfrm_sec_ctx *xfrm_ctx;
1939 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1940 struct sockaddr_in6 *sin6;
1941 #endif
1942 int i;
1943 int size;
1944 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1945 int socklen = (xp->family == AF_INET ?
1946 sizeof(struct sockaddr_in) :
1947 sizeof(struct sockaddr_in6));
1948
1949 size = pfkey_xfrm_policy2msg_size(xp);
1950
1951 /* call should fill header later */
1952 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1953 memset(hdr, 0, size); /* XXX do we need this ? */
1954
1955 /* src address */
1956 addr = (struct sadb_address*) skb_put(skb,
1957 sizeof(struct sadb_address)+sockaddr_size);
1958 addr->sadb_address_len =
1959 (sizeof(struct sadb_address)+sockaddr_size)/
1960 sizeof(uint64_t);
1961 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1962 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1963 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1964 addr->sadb_address_reserved = 0;
1965 /* src address */
1966 if (xp->family == AF_INET) {
1967 sin = (struct sockaddr_in *) (addr + 1);
1968 sin->sin_family = AF_INET;
1969 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1970 sin->sin_port = xp->selector.sport;
1971 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1972 }
1973 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1974 else if (xp->family == AF_INET6) {
1975 sin6 = (struct sockaddr_in6 *) (addr + 1);
1976 sin6->sin6_family = AF_INET6;
1977 sin6->sin6_port = xp->selector.sport;
1978 sin6->sin6_flowinfo = 0;
1979 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1980 sizeof(struct in6_addr));
1981 sin6->sin6_scope_id = 0;
1982 }
1983 #endif
1984 else
1985 BUG();
1986
1987 /* dst address */
1988 addr = (struct sadb_address*) skb_put(skb,
1989 sizeof(struct sadb_address)+sockaddr_size);
1990 addr->sadb_address_len =
1991 (sizeof(struct sadb_address)+sockaddr_size)/
1992 sizeof(uint64_t);
1993 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1994 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1995 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1996 addr->sadb_address_reserved = 0;
1997 if (xp->family == AF_INET) {
1998 sin = (struct sockaddr_in *) (addr + 1);
1999 sin->sin_family = AF_INET;
2000 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2001 sin->sin_port = xp->selector.dport;
2002 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2003 }
2004 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2005 else if (xp->family == AF_INET6) {
2006 sin6 = (struct sockaddr_in6 *) (addr + 1);
2007 sin6->sin6_family = AF_INET6;
2008 sin6->sin6_port = xp->selector.dport;
2009 sin6->sin6_flowinfo = 0;
2010 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2011 sizeof(struct in6_addr));
2012 sin6->sin6_scope_id = 0;
2013 }
2014 #endif
2015 else
2016 BUG();
2017
2018 /* hard time */
2019 lifetime = (struct sadb_lifetime *) skb_put(skb,
2020 sizeof(struct sadb_lifetime));
2021 lifetime->sadb_lifetime_len =
2022 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2023 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2024 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2025 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2026 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2027 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2028 /* soft time */
2029 lifetime = (struct sadb_lifetime *) skb_put(skb,
2030 sizeof(struct sadb_lifetime));
2031 lifetime->sadb_lifetime_len =
2032 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2033 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2034 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2035 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2036 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2037 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2038 /* current time */
2039 lifetime = (struct sadb_lifetime *) skb_put(skb,
2040 sizeof(struct sadb_lifetime));
2041 lifetime->sadb_lifetime_len =
2042 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2043 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2044 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2045 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2046 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2047 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2048
2049 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2050 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2051 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2052 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2053 if (xp->action == XFRM_POLICY_ALLOW) {
2054 if (xp->xfrm_nr)
2055 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2056 else
2057 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2058 }
2059 pol->sadb_x_policy_dir = dir+1;
2060 pol->sadb_x_policy_id = xp->index;
2061 pol->sadb_x_policy_priority = xp->priority;
2062
2063 for (i=0; i<xp->xfrm_nr; i++) {
2064 struct sadb_x_ipsecrequest *rq;
2065 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2066 int req_size;
2067 int mode;
2068
2069 req_size = sizeof(struct sadb_x_ipsecrequest);
2070 if (t->mode == XFRM_MODE_TUNNEL)
2071 req_size += ((t->encap_family == AF_INET ?
2072 sizeof(struct sockaddr_in) :
2073 sizeof(struct sockaddr_in6)) * 2);
2074 else
2075 size -= 2*socklen;
2076 rq = (void*)skb_put(skb, req_size);
2077 pol->sadb_x_policy_len += req_size/8;
2078 memset(rq, 0, sizeof(*rq));
2079 rq->sadb_x_ipsecrequest_len = req_size;
2080 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2081 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2082 return -EINVAL;
2083 rq->sadb_x_ipsecrequest_mode = mode;
2084 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2085 if (t->reqid)
2086 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2087 if (t->optional)
2088 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2089 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2090 if (t->mode == XFRM_MODE_TUNNEL) {
2091 switch (t->encap_family) {
2092 case AF_INET:
2093 sin = (void*)(rq+1);
2094 sin->sin_family = AF_INET;
2095 sin->sin_addr.s_addr = t->saddr.a4;
2096 sin->sin_port = 0;
2097 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2098 sin++;
2099 sin->sin_family = AF_INET;
2100 sin->sin_addr.s_addr = t->id.daddr.a4;
2101 sin->sin_port = 0;
2102 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2103 break;
2104 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2105 case AF_INET6:
2106 sin6 = (void*)(rq+1);
2107 sin6->sin6_family = AF_INET6;
2108 sin6->sin6_port = 0;
2109 sin6->sin6_flowinfo = 0;
2110 memcpy(&sin6->sin6_addr, t->saddr.a6,
2111 sizeof(struct in6_addr));
2112 sin6->sin6_scope_id = 0;
2113
2114 sin6++;
2115 sin6->sin6_family = AF_INET6;
2116 sin6->sin6_port = 0;
2117 sin6->sin6_flowinfo = 0;
2118 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2119 sizeof(struct in6_addr));
2120 sin6->sin6_scope_id = 0;
2121 break;
2122 #endif
2123 default:
2124 break;
2125 }
2126 }
2127 }
2128
2129 /* security context */
2130 if ((xfrm_ctx = xp->security)) {
2131 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2132
2133 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2134 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2135 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2136 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2137 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2138 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2139 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2140 xfrm_ctx->ctx_len);
2141 }
2142
2143 hdr->sadb_msg_len = size / sizeof(uint64_t);
2144 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2145
2146 return 0;
2147 }
2148
2149 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2150 {
2151 struct sk_buff *out_skb;
2152 struct sadb_msg *out_hdr;
2153 int err;
2154
2155 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2156 if (IS_ERR(out_skb)) {
2157 err = PTR_ERR(out_skb);
2158 goto out;
2159 }
2160 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2161 if (err < 0)
2162 return err;
2163
2164 out_hdr = (struct sadb_msg *) out_skb->data;
2165 out_hdr->sadb_msg_version = PF_KEY_V2;
2166
2167 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2168 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2169 else
2170 out_hdr->sadb_msg_type = event2poltype(c->event);
2171 out_hdr->sadb_msg_errno = 0;
2172 out_hdr->sadb_msg_seq = c->seq;
2173 out_hdr->sadb_msg_pid = c->pid;
2174 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2175 out:
2176 return 0;
2177
2178 }
2179
2180 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2181 {
2182 int err = 0;
2183 struct sadb_lifetime *lifetime;
2184 struct sadb_address *sa;
2185 struct sadb_x_policy *pol;
2186 struct xfrm_policy *xp;
2187 struct km_event c;
2188 struct sadb_x_sec_ctx *sec_ctx;
2189
2190 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2191 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2192 !ext_hdrs[SADB_X_EXT_POLICY-1])
2193 return -EINVAL;
2194
2195 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2196 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2197 return -EINVAL;
2198 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2199 return -EINVAL;
2200
2201 xp = xfrm_policy_alloc(GFP_KERNEL);
2202 if (xp == NULL)
2203 return -ENOBUFS;
2204
2205 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2206 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2207 xp->priority = pol->sadb_x_policy_priority;
2208
2209 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2210 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2211 if (!xp->family) {
2212 err = -EINVAL;
2213 goto out;
2214 }
2215 xp->selector.family = xp->family;
2216 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2217 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2218 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2219 if (xp->selector.sport)
2220 xp->selector.sport_mask = htons(0xffff);
2221
2222 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2223 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2224 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2225
2226 /* Amusing, we set this twice. KAME apps appear to set same value
2227 * in both addresses.
2228 */
2229 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2230
2231 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2232 if (xp->selector.dport)
2233 xp->selector.dport_mask = htons(0xffff);
2234
2235 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2236 if (sec_ctx != NULL) {
2237 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2238
2239 if (!uctx) {
2240 err = -ENOBUFS;
2241 goto out;
2242 }
2243
2244 err = security_xfrm_policy_alloc(xp, uctx);
2245 kfree(uctx);
2246
2247 if (err)
2248 goto out;
2249 }
2250
2251 xp->lft.soft_byte_limit = XFRM_INF;
2252 xp->lft.hard_byte_limit = XFRM_INF;
2253 xp->lft.soft_packet_limit = XFRM_INF;
2254 xp->lft.hard_packet_limit = XFRM_INF;
2255 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2256 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2257 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2258 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2259 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2260 }
2261 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2262 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2263 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2264 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2265 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2266 }
2267 xp->xfrm_nr = 0;
2268 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2269 (err = parse_ipsecrequests(xp, pol)) < 0)
2270 goto out;
2271
2272 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2273 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2274
2275 xfrm_audit_policy_add(xp, err ? 0 : 1,
2276 audit_get_loginuid(current->audit_context), 0);
2277
2278 if (err)
2279 goto out;
2280
2281 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2282 c.event = XFRM_MSG_UPDPOLICY;
2283 else
2284 c.event = XFRM_MSG_NEWPOLICY;
2285
2286 c.seq = hdr->sadb_msg_seq;
2287 c.pid = hdr->sadb_msg_pid;
2288
2289 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2290 xfrm_pol_put(xp);
2291 return 0;
2292
2293 out:
2294 xfrm_policy_destroy(xp);
2295 return err;
2296 }
2297
2298 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2299 {
2300 int err;
2301 struct sadb_address *sa;
2302 struct sadb_x_policy *pol;
2303 struct xfrm_policy *xp, tmp;
2304 struct xfrm_selector sel;
2305 struct km_event c;
2306 struct sadb_x_sec_ctx *sec_ctx;
2307
2308 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2309 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2310 !ext_hdrs[SADB_X_EXT_POLICY-1])
2311 return -EINVAL;
2312
2313 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2314 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2315 return -EINVAL;
2316
2317 memset(&sel, 0, sizeof(sel));
2318
2319 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2320 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2321 sel.prefixlen_s = sa->sadb_address_prefixlen;
2322 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2323 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2324 if (sel.sport)
2325 sel.sport_mask = htons(0xffff);
2326
2327 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2328 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2329 sel.prefixlen_d = sa->sadb_address_prefixlen;
2330 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2331 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2332 if (sel.dport)
2333 sel.dport_mask = htons(0xffff);
2334
2335 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2336 memset(&tmp, 0, sizeof(struct xfrm_policy));
2337
2338 if (sec_ctx != NULL) {
2339 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2340
2341 if (!uctx)
2342 return -ENOMEM;
2343
2344 err = security_xfrm_policy_alloc(&tmp, uctx);
2345 kfree(uctx);
2346
2347 if (err)
2348 return err;
2349 }
2350
2351 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
2352 &sel, tmp.security, 1, &err);
2353 security_xfrm_policy_free(&tmp);
2354
2355 if (xp == NULL)
2356 return -ENOENT;
2357
2358 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2359 audit_get_loginuid(current->audit_context), 0);
2360
2361 if (err)
2362 goto out;
2363
2364 c.seq = hdr->sadb_msg_seq;
2365 c.pid = hdr->sadb_msg_pid;
2366 c.event = XFRM_MSG_DELPOLICY;
2367 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2368
2369 out:
2370 xfrm_pol_put(xp);
2371 return err;
2372 }
2373
2374 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2375 {
2376 int err;
2377 struct sk_buff *out_skb;
2378 struct sadb_msg *out_hdr;
2379 err = 0;
2380
2381 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2382 if (IS_ERR(out_skb)) {
2383 err = PTR_ERR(out_skb);
2384 goto out;
2385 }
2386 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2387 if (err < 0)
2388 goto out;
2389
2390 out_hdr = (struct sadb_msg *) out_skb->data;
2391 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2392 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2393 out_hdr->sadb_msg_satype = 0;
2394 out_hdr->sadb_msg_errno = 0;
2395 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2396 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2397 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2398 err = 0;
2399
2400 out:
2401 return err;
2402 }
2403
2404 #ifdef CONFIG_NET_KEY_MIGRATE
2405 static int pfkey_sockaddr_pair_size(sa_family_t family)
2406 {
2407 switch (family) {
2408 case AF_INET:
2409 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2410 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2411 case AF_INET6:
2412 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2413 #endif
2414 default:
2415 return 0;
2416 }
2417 /* NOTREACHED */
2418 }
2419
2420 static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2421 xfrm_address_t *saddr, xfrm_address_t *daddr,
2422 u16 *family)
2423 {
2424 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2425 if (rq->sadb_x_ipsecrequest_len <
2426 pfkey_sockaddr_pair_size(sa->sa_family))
2427 return -EINVAL;
2428
2429 switch (sa->sa_family) {
2430 case AF_INET:
2431 {
2432 struct sockaddr_in *sin;
2433 sin = (struct sockaddr_in *)sa;
2434 if ((sin+1)->sin_family != AF_INET)
2435 return -EINVAL;
2436 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2437 sin++;
2438 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2439 *family = AF_INET;
2440 break;
2441 }
2442 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2443 case AF_INET6:
2444 {
2445 struct sockaddr_in6 *sin6;
2446 sin6 = (struct sockaddr_in6 *)sa;
2447 if ((sin6+1)->sin6_family != AF_INET6)
2448 return -EINVAL;
2449 memcpy(&saddr->a6, &sin6->sin6_addr,
2450 sizeof(saddr->a6));
2451 sin6++;
2452 memcpy(&daddr->a6, &sin6->sin6_addr,
2453 sizeof(daddr->a6));
2454 *family = AF_INET6;
2455 break;
2456 }
2457 #endif
2458 default:
2459 return -EINVAL;
2460 }
2461
2462 return 0;
2463 }
2464
2465 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2466 struct xfrm_migrate *m)
2467 {
2468 int err;
2469 struct sadb_x_ipsecrequest *rq2;
2470 int mode;
2471
2472 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2473 len < rq1->sadb_x_ipsecrequest_len)
2474 return -EINVAL;
2475
2476 /* old endoints */
2477 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2478 &m->old_family);
2479 if (err)
2480 return err;
2481
2482 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2483 len -= rq1->sadb_x_ipsecrequest_len;
2484
2485 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2486 len < rq2->sadb_x_ipsecrequest_len)
2487 return -EINVAL;
2488
2489 /* new endpoints */
2490 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2491 &m->new_family);
2492 if (err)
2493 return err;
2494
2495 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2496 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2497 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2498 return -EINVAL;
2499
2500 m->proto = rq1->sadb_x_ipsecrequest_proto;
2501 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2502 return -EINVAL;
2503 m->mode = mode;
2504 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2505
2506 return ((int)(rq1->sadb_x_ipsecrequest_len +
2507 rq2->sadb_x_ipsecrequest_len));
2508 }
2509
2510 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2511 struct sadb_msg *hdr, void **ext_hdrs)
2512 {
2513 int i, len, ret, err = -EINVAL;
2514 u8 dir;
2515 struct sadb_address *sa;
2516 struct sadb_x_policy *pol;
2517 struct sadb_x_ipsecrequest *rq;
2518 struct xfrm_selector sel;
2519 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2520
2521 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2522 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2523 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2524 err = -EINVAL;
2525 goto out;
2526 }
2527
2528 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2529 if (!pol) {
2530 err = -EINVAL;
2531 goto out;
2532 }
2533
2534 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2535 err = -EINVAL;
2536 goto out;
2537 }
2538
2539 dir = pol->sadb_x_policy_dir - 1;
2540 memset(&sel, 0, sizeof(sel));
2541
2542 /* set source address info of selector */
2543 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2544 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2545 sel.prefixlen_s = sa->sadb_address_prefixlen;
2546 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2547 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2548 if (sel.sport)
2549 sel.sport_mask = htons(0xffff);
2550
2551 /* set destination address info of selector */
2552 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2553 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2554 sel.prefixlen_d = sa->sadb_address_prefixlen;
2555 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2556 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2557 if (sel.dport)
2558 sel.dport_mask = htons(0xffff);
2559
2560 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2561
2562 /* extract ipsecrequests */
2563 i = 0;
2564 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2565
2566 while (len > 0 && i < XFRM_MAX_DEPTH) {
2567 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2568 if (ret < 0) {
2569 err = ret;
2570 goto out;
2571 } else {
2572 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2573 len -= ret;
2574 i++;
2575 }
2576 }
2577
2578 if (!i || len > 0) {
2579 err = -EINVAL;
2580 goto out;
2581 }
2582
2583 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2584
2585 out:
2586 return err;
2587 }
2588 #else
2589 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2590 struct sadb_msg *hdr, void **ext_hdrs)
2591 {
2592 return -ENOPROTOOPT;
2593 }
2594 #endif
2595
2596
2597 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2598 {
2599 unsigned int dir;
2600 int err = 0, delete;
2601 struct sadb_x_policy *pol;
2602 struct xfrm_policy *xp;
2603 struct km_event c;
2604
2605 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2606 return -EINVAL;
2607
2608 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2609 if (dir >= XFRM_POLICY_MAX)
2610 return -EINVAL;
2611
2612 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2613 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2614 delete, &err);
2615 if (xp == NULL)
2616 return -ENOENT;
2617
2618 if (delete) {
2619 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2620 audit_get_loginuid(current->audit_context), 0);
2621
2622 if (err)
2623 goto out;
2624 c.seq = hdr->sadb_msg_seq;
2625 c.pid = hdr->sadb_msg_pid;
2626 c.data.byid = 1;
2627 c.event = XFRM_MSG_DELPOLICY;
2628 km_policy_notify(xp, dir, &c);
2629 } else {
2630 err = key_pol_get_resp(sk, xp, hdr, dir);
2631 }
2632
2633 out:
2634 xfrm_pol_put(xp);
2635 return err;
2636 }
2637
2638 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2639 {
2640 struct pfkey_dump_data *data = ptr;
2641 struct sk_buff *out_skb;
2642 struct sadb_msg *out_hdr;
2643 int err;
2644
2645 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2646 if (IS_ERR(out_skb))
2647 return PTR_ERR(out_skb);
2648
2649 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2650 if (err < 0)
2651 return err;
2652
2653 out_hdr = (struct sadb_msg *) out_skb->data;
2654 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2655 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2656 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2657 out_hdr->sadb_msg_errno = 0;
2658 out_hdr->sadb_msg_seq = count;
2659 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2660 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2661 return 0;
2662 }
2663
2664 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2665 {
2666 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2667
2668 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
2669 }
2670
2671 static int key_notify_policy_flush(struct km_event *c)
2672 {
2673 struct sk_buff *skb_out;
2674 struct sadb_msg *hdr;
2675
2676 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2677 if (!skb_out)
2678 return -ENOBUFS;
2679 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2680 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2681 hdr->sadb_msg_seq = c->seq;
2682 hdr->sadb_msg_pid = c->pid;
2683 hdr->sadb_msg_version = PF_KEY_V2;
2684 hdr->sadb_msg_errno = (uint8_t) 0;
2685 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2686 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2687 return 0;
2688
2689 }
2690
2691 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2692 {
2693 struct km_event c;
2694 struct xfrm_audit audit_info;
2695 int err;
2696
2697 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2698 audit_info.secid = 0;
2699 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2700 if (err)
2701 return err;
2702 c.data.type = XFRM_POLICY_TYPE_MAIN;
2703 c.event = XFRM_MSG_FLUSHPOLICY;
2704 c.pid = hdr->sadb_msg_pid;
2705 c.seq = hdr->sadb_msg_seq;
2706 km_policy_notify(NULL, 0, &c);
2707
2708 return 0;
2709 }
2710
2711 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2712 struct sadb_msg *hdr, void **ext_hdrs);
2713 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2714 [SADB_RESERVED] = pfkey_reserved,
2715 [SADB_GETSPI] = pfkey_getspi,
2716 [SADB_UPDATE] = pfkey_add,
2717 [SADB_ADD] = pfkey_add,
2718 [SADB_DELETE] = pfkey_delete,
2719 [SADB_GET] = pfkey_get,
2720 [SADB_ACQUIRE] = pfkey_acquire,
2721 [SADB_REGISTER] = pfkey_register,
2722 [SADB_EXPIRE] = NULL,
2723 [SADB_FLUSH] = pfkey_flush,
2724 [SADB_DUMP] = pfkey_dump,
2725 [SADB_X_PROMISC] = pfkey_promisc,
2726 [SADB_X_PCHANGE] = NULL,
2727 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2728 [SADB_X_SPDADD] = pfkey_spdadd,
2729 [SADB_X_SPDDELETE] = pfkey_spddelete,
2730 [SADB_X_SPDGET] = pfkey_spdget,
2731 [SADB_X_SPDACQUIRE] = NULL,
2732 [SADB_X_SPDDUMP] = pfkey_spddump,
2733 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2734 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2735 [SADB_X_SPDDELETE2] = pfkey_spdget,
2736 [SADB_X_MIGRATE] = pfkey_migrate,
2737 };
2738
2739 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2740 {
2741 void *ext_hdrs[SADB_EXT_MAX];
2742 int err;
2743
2744 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2745 BROADCAST_PROMISC_ONLY, NULL);
2746
2747 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2748 err = parse_exthdrs(skb, hdr, ext_hdrs);
2749 if (!err) {
2750 err = -EOPNOTSUPP;
2751 if (pfkey_funcs[hdr->sadb_msg_type])
2752 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2753 }
2754 return err;
2755 }
2756
2757 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2758 {
2759 struct sadb_msg *hdr = NULL;
2760
2761 if (skb->len < sizeof(*hdr)) {
2762 *errp = -EMSGSIZE;
2763 } else {
2764 hdr = (struct sadb_msg *) skb->data;
2765 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2766 hdr->sadb_msg_reserved != 0 ||
2767 (hdr->sadb_msg_type <= SADB_RESERVED ||
2768 hdr->sadb_msg_type > SADB_MAX)) {
2769 hdr = NULL;
2770 *errp = -EINVAL;
2771 } else if (hdr->sadb_msg_len != (skb->len /
2772 sizeof(uint64_t)) ||
2773 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2774 sizeof(uint64_t))) {
2775 hdr = NULL;
2776 *errp = -EMSGSIZE;
2777 } else {
2778 *errp = 0;
2779 }
2780 }
2781 return hdr;
2782 }
2783
2784 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2785 {
2786 unsigned int id = d->desc.sadb_alg_id;
2787
2788 if (id >= sizeof(t->aalgos) * 8)
2789 return 0;
2790
2791 return (t->aalgos >> id) & 1;
2792 }
2793
2794 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2795 {
2796 unsigned int id = d->desc.sadb_alg_id;
2797
2798 if (id >= sizeof(t->ealgos) * 8)
2799 return 0;
2800
2801 return (t->ealgos >> id) & 1;
2802 }
2803
2804 static int count_ah_combs(struct xfrm_tmpl *t)
2805 {
2806 int i, sz = 0;
2807
2808 for (i = 0; ; i++) {
2809 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2810 if (!aalg)
2811 break;
2812 if (aalg_tmpl_set(t, aalg) && aalg->available)
2813 sz += sizeof(struct sadb_comb);
2814 }
2815 return sz + sizeof(struct sadb_prop);
2816 }
2817
2818 static int count_esp_combs(struct xfrm_tmpl *t)
2819 {
2820 int i, k, sz = 0;
2821
2822 for (i = 0; ; i++) {
2823 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2824 if (!ealg)
2825 break;
2826
2827 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2828 continue;
2829
2830 for (k = 1; ; k++) {
2831 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2832 if (!aalg)
2833 break;
2834
2835 if (aalg_tmpl_set(t, aalg) && aalg->available)
2836 sz += sizeof(struct sadb_comb);
2837 }
2838 }
2839 return sz + sizeof(struct sadb_prop);
2840 }
2841
2842 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2843 {
2844 struct sadb_prop *p;
2845 int i;
2846
2847 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2848 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2849 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2850 p->sadb_prop_replay = 32;
2851 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2852
2853 for (i = 0; ; i++) {
2854 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2855 if (!aalg)
2856 break;
2857
2858 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2859 struct sadb_comb *c;
2860 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2861 memset(c, 0, sizeof(*c));
2862 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2863 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2864 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2865 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2866 c->sadb_comb_hard_addtime = 24*60*60;
2867 c->sadb_comb_soft_addtime = 20*60*60;
2868 c->sadb_comb_hard_usetime = 8*60*60;
2869 c->sadb_comb_soft_usetime = 7*60*60;
2870 }
2871 }
2872 }
2873
2874 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2875 {
2876 struct sadb_prop *p;
2877 int i, k;
2878
2879 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2880 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2881 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2882 p->sadb_prop_replay = 32;
2883 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2884
2885 for (i=0; ; i++) {
2886 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2887 if (!ealg)
2888 break;
2889
2890 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2891 continue;
2892
2893 for (k = 1; ; k++) {
2894 struct sadb_comb *c;
2895 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2896 if (!aalg)
2897 break;
2898 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2899 continue;
2900 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2901 memset(c, 0, sizeof(*c));
2902 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2903 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2904 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2905 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2906 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2907 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2908 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2909 c->sadb_comb_hard_addtime = 24*60*60;
2910 c->sadb_comb_soft_addtime = 20*60*60;
2911 c->sadb_comb_hard_usetime = 8*60*60;
2912 c->sadb_comb_soft_usetime = 7*60*60;
2913 }
2914 }
2915 }
2916
2917 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2918 {
2919 return 0;
2920 }
2921
2922 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2923 {
2924 struct sk_buff *out_skb;
2925 struct sadb_msg *out_hdr;
2926 int hard;
2927 int hsc;
2928
2929 hard = c->data.hard;
2930 if (hard)
2931 hsc = 2;
2932 else
2933 hsc = 1;
2934
2935 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2936 if (IS_ERR(out_skb))
2937 return PTR_ERR(out_skb);
2938
2939 out_hdr = (struct sadb_msg *) out_skb->data;
2940 out_hdr->sadb_msg_version = PF_KEY_V2;
2941 out_hdr->sadb_msg_type = SADB_EXPIRE;
2942 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2943 out_hdr->sadb_msg_errno = 0;
2944 out_hdr->sadb_msg_reserved = 0;
2945 out_hdr->sadb_msg_seq = 0;
2946 out_hdr->sadb_msg_pid = 0;
2947
2948 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2949 return 0;
2950 }
2951
2952 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2953 {
2954 switch (c->event) {
2955 case XFRM_MSG_EXPIRE:
2956 return key_notify_sa_expire(x, c);
2957 case XFRM_MSG_DELSA:
2958 case XFRM_MSG_NEWSA:
2959 case XFRM_MSG_UPDSA:
2960 return key_notify_sa(x, c);
2961 case XFRM_MSG_FLUSHSA:
2962 return key_notify_sa_flush(c);
2963 case XFRM_MSG_NEWAE: /* not yet supported */
2964 break;
2965 default:
2966 printk("pfkey: Unknown SA event %d\n", c->event);
2967 break;
2968 }
2969
2970 return 0;
2971 }
2972
2973 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2974 {
2975 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2976 return 0;
2977
2978 switch (c->event) {
2979 case XFRM_MSG_POLEXPIRE:
2980 return key_notify_policy_expire(xp, c);
2981 case XFRM_MSG_DELPOLICY:
2982 case XFRM_MSG_NEWPOLICY:
2983 case XFRM_MSG_UPDPOLICY:
2984 return key_notify_policy(xp, dir, c);
2985 case XFRM_MSG_FLUSHPOLICY:
2986 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2987 break;
2988 return key_notify_policy_flush(c);
2989 default:
2990 printk("pfkey: Unknown policy event %d\n", c->event);
2991 break;
2992 }
2993
2994 return 0;
2995 }
2996
2997 static u32 get_acqseq(void)
2998 {
2999 u32 res;
3000 static u32 acqseq;
3001 static DEFINE_SPINLOCK(acqseq_lock);
3002
3003 spin_lock_bh(&acqseq_lock);
3004 res = (++acqseq ? : ++acqseq);
3005 spin_unlock_bh(&acqseq_lock);
3006 return res;
3007 }
3008
3009 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3010 {
3011 struct sk_buff *skb;
3012 struct sadb_msg *hdr;
3013 struct sadb_address *addr;
3014 struct sadb_x_policy *pol;
3015 struct sockaddr_in *sin;
3016 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3017 struct sockaddr_in6 *sin6;
3018 #endif
3019 int sockaddr_size;
3020 int size;
3021 struct sadb_x_sec_ctx *sec_ctx;
3022 struct xfrm_sec_ctx *xfrm_ctx;
3023 int ctx_size = 0;
3024
3025 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3026 if (!sockaddr_size)
3027 return -EINVAL;
3028
3029 size = sizeof(struct sadb_msg) +
3030 (sizeof(struct sadb_address) * 2) +
3031 (sockaddr_size * 2) +
3032 sizeof(struct sadb_x_policy);
3033
3034 if (x->id.proto == IPPROTO_AH)
3035 size += count_ah_combs(t);
3036 else if (x->id.proto == IPPROTO_ESP)
3037 size += count_esp_combs(t);
3038
3039 if ((xfrm_ctx = x->security)) {
3040 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3041 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3042 }
3043
3044 skb = alloc_skb(size + 16, GFP_ATOMIC);
3045 if (skb == NULL)
3046 return -ENOMEM;
3047
3048 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3049 hdr->sadb_msg_version = PF_KEY_V2;
3050 hdr->sadb_msg_type = SADB_ACQUIRE;
3051 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3052 hdr->sadb_msg_len = size / sizeof(uint64_t);
3053 hdr->sadb_msg_errno = 0;
3054 hdr->sadb_msg_reserved = 0;
3055 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3056 hdr->sadb_msg_pid = 0;
3057
3058 /* src address */
3059 addr = (struct sadb_address*) skb_put(skb,
3060 sizeof(struct sadb_address)+sockaddr_size);
3061 addr->sadb_address_len =
3062 (sizeof(struct sadb_address)+sockaddr_size)/
3063 sizeof(uint64_t);
3064 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3065 addr->sadb_address_proto = 0;
3066 addr->sadb_address_reserved = 0;
3067 if (x->props.family == AF_INET) {
3068 addr->sadb_address_prefixlen = 32;
3069
3070 sin = (struct sockaddr_in *) (addr + 1);
3071 sin->sin_family = AF_INET;
3072 sin->sin_addr.s_addr = x->props.saddr.a4;
3073 sin->sin_port = 0;
3074 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3075 }
3076 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3077 else if (x->props.family == AF_INET6) {
3078 addr->sadb_address_prefixlen = 128;
3079
3080 sin6 = (struct sockaddr_in6 *) (addr + 1);
3081 sin6->sin6_family = AF_INET6;
3082 sin6->sin6_port = 0;
3083 sin6->sin6_flowinfo = 0;
3084 memcpy(&sin6->sin6_addr,
3085 x->props.saddr.a6, sizeof(struct in6_addr));
3086 sin6->sin6_scope_id = 0;
3087 }
3088 #endif
3089 else
3090 BUG();
3091
3092 /* dst address */
3093 addr = (struct sadb_address*) skb_put(skb,
3094 sizeof(struct sadb_address)+sockaddr_size);
3095 addr->sadb_address_len =
3096 (sizeof(struct sadb_address)+sockaddr_size)/
3097 sizeof(uint64_t);
3098 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3099 addr->sadb_address_proto = 0;
3100 addr->sadb_address_reserved = 0;
3101 if (x->props.family == AF_INET) {
3102 addr->sadb_address_prefixlen = 32;
3103
3104 sin = (struct sockaddr_in *) (addr + 1);
3105 sin->sin_family = AF_INET;
3106 sin->sin_addr.s_addr = x->id.daddr.a4;
3107 sin->sin_port = 0;
3108 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3109 }
3110 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3111 else if (x->props.family == AF_INET6) {
3112 addr->sadb_address_prefixlen = 128;
3113
3114 sin6 = (struct sockaddr_in6 *) (addr + 1);
3115 sin6->sin6_family = AF_INET6;
3116 sin6->sin6_port = 0;
3117 sin6->sin6_flowinfo = 0;
3118 memcpy(&sin6->sin6_addr,
3119 x->id.daddr.a6, sizeof(struct in6_addr));
3120 sin6->sin6_scope_id = 0;
3121 }
3122 #endif
3123 else
3124 BUG();
3125
3126 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3127 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3128 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3129 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3130 pol->sadb_x_policy_dir = dir+1;
3131 pol->sadb_x_policy_id = xp->index;
3132
3133 /* Set sadb_comb's. */
3134 if (x->id.proto == IPPROTO_AH)
3135 dump_ah_combs(skb, t);
3136 else if (x->id.proto == IPPROTO_ESP)
3137 dump_esp_combs(skb, t);
3138
3139 /* security context */
3140 if (xfrm_ctx) {
3141 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3142 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3143 sec_ctx->sadb_x_sec_len =
3144 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3145 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3146 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3147 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3148 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3149 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3150 xfrm_ctx->ctx_len);
3151 }
3152
3153 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3154 }
3155
3156 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3157 u8 *data, int len, int *dir)
3158 {
3159 struct xfrm_policy *xp;
3160 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3161 struct sadb_x_sec_ctx *sec_ctx;
3162
3163 switch (sk->sk_family) {
3164 case AF_INET:
3165 if (opt != IP_IPSEC_POLICY) {
3166 *dir = -EOPNOTSUPP;
3167 return NULL;
3168 }
3169 break;
3170 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3171 case AF_INET6:
3172 if (opt != IPV6_IPSEC_POLICY) {
3173 *dir = -EOPNOTSUPP;
3174 return NULL;
3175 }
3176 break;
3177 #endif
3178 default:
3179 *dir = -EINVAL;
3180 return NULL;
3181 }
3182
3183 *dir = -EINVAL;
3184
3185 if (len < sizeof(struct sadb_x_policy) ||
3186 pol->sadb_x_policy_len*8 > len ||
3187 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3188 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3189 return NULL;
3190
3191 xp = xfrm_policy_alloc(GFP_ATOMIC);
3192 if (xp == NULL) {
3193 *dir = -ENOBUFS;
3194 return NULL;
3195 }
3196
3197 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3198 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3199
3200 xp->lft.soft_byte_limit = XFRM_INF;
3201 xp->lft.hard_byte_limit = XFRM_INF;
3202 xp->lft.soft_packet_limit = XFRM_INF;
3203 xp->lft.hard_packet_limit = XFRM_INF;
3204 xp->family = sk->sk_family;
3205
3206 xp->xfrm_nr = 0;
3207 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3208 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3209 goto out;
3210
3211 /* security context too */
3212 if (len >= (pol->sadb_x_policy_len*8 +
3213 sizeof(struct sadb_x_sec_ctx))) {
3214 char *p = (char *)pol;
3215 struct xfrm_user_sec_ctx *uctx;
3216
3217 p += pol->sadb_x_policy_len*8;
3218 sec_ctx = (struct sadb_x_sec_ctx *)p;
3219 if (len < pol->sadb_x_policy_len*8 +
3220 sec_ctx->sadb_x_sec_len) {
3221 *dir = -EINVAL;
3222 goto out;
3223 }
3224 if ((*dir = verify_sec_ctx_len(p)))
3225 goto out;
3226 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3227 *dir = security_xfrm_policy_alloc(xp, uctx);
3228 kfree(uctx);
3229
3230 if (*dir)
3231 goto out;
3232 }
3233
3234 *dir = pol->sadb_x_policy_dir-1;
3235 return xp;
3236
3237 out:
3238 xfrm_policy_destroy(xp);
3239 return NULL;
3240 }
3241
3242 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3243 {
3244 struct sk_buff *skb;
3245 struct sadb_msg *hdr;
3246 struct sadb_sa *sa;
3247 struct sadb_address *addr;
3248 struct sadb_x_nat_t_port *n_port;
3249 struct sockaddr_in *sin;
3250 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3251 struct sockaddr_in6 *sin6;
3252 #endif
3253 int sockaddr_size;
3254 int size;
3255 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3256 struct xfrm_encap_tmpl *natt = NULL;
3257
3258 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3259 if (!sockaddr_size)
3260 return -EINVAL;
3261
3262 if (!satype)
3263 return -EINVAL;
3264
3265 if (!x->encap)
3266 return -EINVAL;
3267
3268 natt = x->encap;
3269
3270 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3271 *
3272 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3273 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3274 */
3275
3276 size = sizeof(struct sadb_msg) +
3277 sizeof(struct sadb_sa) +
3278 (sizeof(struct sadb_address) * 2) +
3279 (sockaddr_size * 2) +
3280 (sizeof(struct sadb_x_nat_t_port) * 2);
3281
3282 skb = alloc_skb(size + 16, GFP_ATOMIC);
3283 if (skb == NULL)
3284 return -ENOMEM;
3285
3286 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3287 hdr->sadb_msg_version = PF_KEY_V2;
3288 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3289 hdr->sadb_msg_satype = satype;
3290 hdr->sadb_msg_len = size / sizeof(uint64_t);
3291 hdr->sadb_msg_errno = 0;
3292 hdr->sadb_msg_reserved = 0;
3293 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3294 hdr->sadb_msg_pid = 0;
3295
3296 /* SA */
3297 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3298 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3299 sa->sadb_sa_exttype = SADB_EXT_SA;
3300 sa->sadb_sa_spi = x->id.spi;
3301 sa->sadb_sa_replay = 0;
3302 sa->sadb_sa_state = 0;
3303 sa->sadb_sa_auth = 0;
3304 sa->sadb_sa_encrypt = 0;
3305 sa->sadb_sa_flags = 0;
3306
3307 /* ADDRESS_SRC (old addr) */
3308 addr = (struct sadb_address*)
3309 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3310 addr->sadb_address_len =
3311 (sizeof(struct sadb_address)+sockaddr_size)/
3312 sizeof(uint64_t);
3313 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3314 addr->sadb_address_proto = 0;
3315 addr->sadb_address_reserved = 0;
3316 if (x->props.family == AF_INET) {
3317 addr->sadb_address_prefixlen = 32;
3318
3319 sin = (struct sockaddr_in *) (addr + 1);
3320 sin->sin_family = AF_INET;
3321 sin->sin_addr.s_addr = x->props.saddr.a4;
3322 sin->sin_port = 0;
3323 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3324 }
3325 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3326 else if (x->props.family == AF_INET6) {
3327 addr->sadb_address_prefixlen = 128;
3328
3329 sin6 = (struct sockaddr_in6 *) (addr + 1);
3330 sin6->sin6_family = AF_INET6;
3331 sin6->sin6_port = 0;
3332 sin6->sin6_flowinfo = 0;
3333 memcpy(&sin6->sin6_addr,
3334 x->props.saddr.a6, sizeof(struct in6_addr));
3335 sin6->sin6_scope_id = 0;
3336 }
3337 #endif
3338 else
3339 BUG();
3340
3341 /* NAT_T_SPORT (old port) */
3342 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3343 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3344 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3345 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3346 n_port->sadb_x_nat_t_port_reserved = 0;
3347
3348 /* ADDRESS_DST (new addr) */
3349 addr = (struct sadb_address*)
3350 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3351 addr->sadb_address_len =
3352 (sizeof(struct sadb_address)+sockaddr_size)/
3353 sizeof(uint64_t);
3354 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3355 addr->sadb_address_proto = 0;
3356 addr->sadb_address_reserved = 0;
3357 if (x->props.family == AF_INET) {
3358 addr->sadb_address_prefixlen = 32;
3359
3360 sin = (struct sockaddr_in *) (addr + 1);
3361 sin->sin_family = AF_INET;
3362 sin->sin_addr.s_addr = ipaddr->a4;
3363 sin->sin_port = 0;
3364 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3365 }
3366 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3367 else if (x->props.family == AF_INET6) {
3368 addr->sadb_address_prefixlen = 128;
3369
3370 sin6 = (struct sockaddr_in6 *) (addr + 1);
3371 sin6->sin6_family = AF_INET6;
3372 sin6->sin6_port = 0;
3373 sin6->sin6_flowinfo = 0;
3374 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3375 sin6->sin6_scope_id = 0;
3376 }
3377 #endif
3378 else
3379 BUG();
3380
3381 /* NAT_T_DPORT (new port) */
3382 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3383 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3384 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3385 n_port->sadb_x_nat_t_port_port = sport;
3386 n_port->sadb_x_nat_t_port_reserved = 0;
3387
3388 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3389 }
3390
3391 #ifdef CONFIG_NET_KEY_MIGRATE
3392 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3393 struct xfrm_selector *sel)
3394 {
3395 struct sadb_address *addr;
3396 struct sockaddr_in *sin;
3397 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3398 struct sockaddr_in6 *sin6;
3399 #endif
3400 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3401 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3402 addr->sadb_address_exttype = type;
3403 addr->sadb_address_proto = sel->proto;
3404 addr->sadb_address_reserved = 0;
3405
3406 switch (type) {
3407 case SADB_EXT_ADDRESS_SRC:
3408 if (sel->family == AF_INET) {
3409 addr->sadb_address_prefixlen = sel->prefixlen_s;
3410 sin = (struct sockaddr_in *)(addr + 1);
3411 sin->sin_family = AF_INET;
3412 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3413 sizeof(sin->sin_addr.s_addr));
3414 sin->sin_port = 0;
3415 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3416 }
3417 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3418 else if (sel->family == AF_INET6) {
3419 addr->sadb_address_prefixlen = sel->prefixlen_s;
3420 sin6 = (struct sockaddr_in6 *)(addr + 1);
3421 sin6->sin6_family = AF_INET6;
3422 sin6->sin6_port = 0;
3423 sin6->sin6_flowinfo = 0;
3424 sin6->sin6_scope_id = 0;
3425 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3426 sizeof(sin6->sin6_addr.s6_addr));
3427 }
3428 #endif
3429 break;
3430 case SADB_EXT_ADDRESS_DST:
3431 if (sel->family == AF_INET) {
3432 addr->sadb_address_prefixlen = sel->prefixlen_d;
3433 sin = (struct sockaddr_in *)(addr + 1);
3434 sin->sin_family = AF_INET;
3435 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3436 sizeof(sin->sin_addr.s_addr));
3437 sin->sin_port = 0;
3438 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3439 }
3440 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3441 else if (sel->family == AF_INET6) {
3442 addr->sadb_address_prefixlen = sel->prefixlen_d;
3443 sin6 = (struct sockaddr_in6 *)(addr + 1);
3444 sin6->sin6_family = AF_INET6;
3445 sin6->sin6_port = 0;
3446 sin6->sin6_flowinfo = 0;
3447 sin6->sin6_scope_id = 0;
3448 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3449 sizeof(sin6->sin6_addr.s6_addr));
3450 }
3451 #endif
3452 break;
3453 default:
3454 return -EINVAL;
3455 }
3456
3457 return 0;
3458 }
3459
3460 static int set_ipsecrequest(struct sk_buff *skb,
3461 uint8_t proto, uint8_t mode, int level,
3462 uint32_t reqid, uint8_t family,
3463 xfrm_address_t *src, xfrm_address_t *dst)
3464 {
3465 struct sadb_x_ipsecrequest *rq;
3466 struct sockaddr_in *sin;
3467 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3468 struct sockaddr_in6 *sin6;
3469 #endif
3470 int size_req;
3471
3472 size_req = sizeof(struct sadb_x_ipsecrequest) +
3473 pfkey_sockaddr_pair_size(family);
3474
3475 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3476 memset(rq, 0, size_req);
3477 rq->sadb_x_ipsecrequest_len = size_req;
3478 rq->sadb_x_ipsecrequest_proto = proto;
3479 rq->sadb_x_ipsecrequest_mode = mode;
3480 rq->sadb_x_ipsecrequest_level = level;
3481 rq->sadb_x_ipsecrequest_reqid = reqid;
3482
3483 switch (family) {
3484 case AF_INET:
3485 sin = (struct sockaddr_in *)(rq + 1);
3486 sin->sin_family = AF_INET;
3487 memcpy(&sin->sin_addr.s_addr, src,
3488 sizeof(sin->sin_addr.s_addr));
3489 sin++;
3490 sin->sin_family = AF_INET;
3491 memcpy(&sin->sin_addr.s_addr, dst,
3492 sizeof(sin->sin_addr.s_addr));
3493 break;
3494 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3495 case AF_INET6:
3496 sin6 = (struct sockaddr_in6 *)(rq + 1);
3497 sin6->sin6_family = AF_INET6;
3498 sin6->sin6_port = 0;
3499 sin6->sin6_flowinfo = 0;
3500 sin6->sin6_scope_id = 0;
3501 memcpy(&sin6->sin6_addr.s6_addr, src,
3502 sizeof(sin6->sin6_addr.s6_addr));
3503 sin6++;
3504 sin6->sin6_family = AF_INET6;
3505 sin6->sin6_port = 0;
3506 sin6->sin6_flowinfo = 0;
3507 sin6->sin6_scope_id = 0;
3508 memcpy(&sin6->sin6_addr.s6_addr, dst,
3509 sizeof(sin6->sin6_addr.s6_addr));
3510 break;
3511 #endif
3512 default:
3513 return -EINVAL;
3514 }
3515
3516 return 0;
3517 }
3518 #endif
3519
3520 #ifdef CONFIG_NET_KEY_MIGRATE
3521 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3522 struct xfrm_migrate *m, int num_bundles)
3523 {
3524 int i;
3525 int sasize_sel;
3526 int size = 0;
3527 int size_pol = 0;
3528 struct sk_buff *skb;
3529 struct sadb_msg *hdr;
3530 struct sadb_x_policy *pol;
3531 struct xfrm_migrate *mp;
3532
3533 if (type != XFRM_POLICY_TYPE_MAIN)
3534 return 0;
3535
3536 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3537 return -EINVAL;
3538
3539 /* selector */
3540 sasize_sel = pfkey_sockaddr_size(sel->family);
3541 if (!sasize_sel)
3542 return -EINVAL;
3543 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3544
3545 /* policy info */
3546 size_pol += sizeof(struct sadb_x_policy);
3547
3548 /* ipsecrequests */
3549 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3550 /* old locator pair */
3551 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3552 pfkey_sockaddr_pair_size(mp->old_family);
3553 /* new locator pair */
3554 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3555 pfkey_sockaddr_pair_size(mp->new_family);
3556 }
3557
3558 size += sizeof(struct sadb_msg) + size_pol;
3559
3560 /* alloc buffer */
3561 skb = alloc_skb(size, GFP_ATOMIC);
3562 if (skb == NULL)
3563 return -ENOMEM;
3564
3565 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3566 hdr->sadb_msg_version = PF_KEY_V2;
3567 hdr->sadb_msg_type = SADB_X_MIGRATE;
3568 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3569 hdr->sadb_msg_len = size / 8;
3570 hdr->sadb_msg_errno = 0;
3571 hdr->sadb_msg_reserved = 0;
3572 hdr->sadb_msg_seq = 0;
3573 hdr->sadb_msg_pid = 0;
3574
3575 /* selector src */
3576 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3577
3578 /* selector dst */
3579 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3580
3581 /* policy information */
3582 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3583 pol->sadb_x_policy_len = size_pol / 8;
3584 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3585 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3586 pol->sadb_x_policy_dir = dir + 1;
3587 pol->sadb_x_policy_id = 0;
3588 pol->sadb_x_policy_priority = 0;
3589
3590 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3591 /* old ipsecrequest */
3592 int mode = pfkey_mode_from_xfrm(mp->mode);
3593 if (mode < 0)
3594 goto err;
3595 if (set_ipsecrequest(skb, mp->proto, mode,
3596 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3597 mp->reqid, mp->old_family,
3598 &mp->old_saddr, &mp->old_daddr) < 0)
3599 goto err;
3600
3601 /* new ipsecrequest */
3602 if (set_ipsecrequest(skb, mp->proto, mode,
3603 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3604 mp->reqid, mp->new_family,
3605 &mp->new_saddr, &mp->new_daddr) < 0)
3606 goto err;
3607 }
3608
3609 /* broadcast migrate message to sockets */
3610 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3611
3612 return 0;
3613
3614 err:
3615 kfree_skb(skb);
3616 return -EINVAL;
3617 }
3618 #else
3619 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3620 struct xfrm_migrate *m, int num_bundles)
3621 {
3622 return -ENOPROTOOPT;
3623 }
3624 #endif
3625
3626 static int pfkey_sendmsg(struct kiocb *kiocb,
3627 struct socket *sock, struct msghdr *msg, size_t len)
3628 {
3629 struct sock *sk = sock->sk;
3630 struct sk_buff *skb = NULL;
3631 struct sadb_msg *hdr = NULL;
3632 int err;
3633
3634 err = -EOPNOTSUPP;
3635 if (msg->msg_flags & MSG_OOB)
3636 goto out;
3637
3638 err = -EMSGSIZE;
3639 if ((unsigned)len > sk->sk_sndbuf - 32)
3640 goto out;
3641
3642 err = -ENOBUFS;
3643 skb = alloc_skb(len, GFP_KERNEL);
3644 if (skb == NULL)
3645 goto out;
3646
3647 err = -EFAULT;
3648 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3649 goto out;
3650
3651 hdr = pfkey_get_base_msg(skb, &err);
3652 if (!hdr)
3653 goto out;
3654
3655 mutex_lock(&xfrm_cfg_mutex);
3656 err = pfkey_process(sk, skb, hdr);
3657 mutex_unlock(&xfrm_cfg_mutex);
3658
3659 out:
3660 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3661 err = 0;
3662 if (skb)
3663 kfree_skb(skb);
3664
3665 return err ? : len;
3666 }
3667
3668 static int pfkey_recvmsg(struct kiocb *kiocb,
3669 struct socket *sock, struct msghdr *msg, size_t len,
3670 int flags)
3671 {
3672 struct sock *sk = sock->sk;
3673 struct sk_buff *skb;
3674 int copied, err;
3675
3676 err = -EINVAL;
3677 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3678 goto out;
3679
3680 msg->msg_namelen = 0;
3681 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3682 if (skb == NULL)
3683 goto out;
3684
3685 copied = skb->len;
3686 if (copied > len) {
3687 msg->msg_flags |= MSG_TRUNC;
3688 copied = len;
3689 }
3690
3691 skb_reset_transport_header(skb);
3692 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3693 if (err)
3694 goto out_free;
3695
3696 sock_recv_timestamp(msg, sk, skb);
3697
3698 err = (flags & MSG_TRUNC) ? skb->len : copied;
3699
3700 out_free:
3701 skb_free_datagram(sk, skb);
3702 out:
3703 return err;
3704 }
3705
3706 static const struct proto_ops pfkey_ops = {
3707 .family = PF_KEY,
3708 .owner = THIS_MODULE,
3709 /* Operations that make no sense on pfkey sockets. */
3710 .bind = sock_no_bind,
3711 .connect = sock_no_connect,
3712 .socketpair = sock_no_socketpair,
3713 .accept = sock_no_accept,
3714 .getname = sock_no_getname,
3715 .ioctl = sock_no_ioctl,
3716 .listen = sock_no_listen,
3717 .shutdown = sock_no_shutdown,
3718 .setsockopt = sock_no_setsockopt,
3719 .getsockopt = sock_no_getsockopt,
3720 .mmap = sock_no_mmap,
3721 .sendpage = sock_no_sendpage,
3722
3723 /* Now the operations that really occur. */
3724 .release = pfkey_release,
3725 .poll = datagram_poll,
3726 .sendmsg = pfkey_sendmsg,
3727 .recvmsg = pfkey_recvmsg,
3728 };
3729
3730 static struct net_proto_family pfkey_family_ops = {
3731 .family = PF_KEY,
3732 .create = pfkey_create,
3733 .owner = THIS_MODULE,
3734 };
3735
3736 #ifdef CONFIG_PROC_FS
3737 static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3738 int length, int *eof, void *data)
3739 {
3740 off_t pos = 0;
3741 off_t begin = 0;
3742 int len = 0;
3743 struct sock *s;
3744 struct hlist_node *node;
3745
3746 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3747
3748 read_lock(&pfkey_table_lock);
3749
3750 sk_for_each(s, node, &pfkey_table) {
3751 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3752 s,
3753 atomic_read(&s->sk_refcnt),
3754 atomic_read(&s->sk_rmem_alloc),
3755 atomic_read(&s->sk_wmem_alloc),
3756 sock_i_uid(s),
3757 sock_i_ino(s)
3758 );
3759
3760 buffer[len++] = '\n';
3761
3762 pos = begin + len;
3763 if (pos < offset) {
3764 len = 0;
3765 begin = pos;
3766 }
3767 if(pos > offset + length)
3768 goto done;
3769 }
3770 *eof = 1;
3771
3772 done:
3773 read_unlock(&pfkey_table_lock);
3774
3775 *start = buffer + (offset - begin);
3776 len -= (offset - begin);
3777
3778 if (len > length)
3779 len = length;
3780 if (len < 0)
3781 len = 0;
3782
3783 return len;
3784 }
3785 #endif
3786
3787 static struct xfrm_mgr pfkeyv2_mgr =
3788 {
3789 .id = "pfkeyv2",
3790 .notify = pfkey_send_notify,
3791 .acquire = pfkey_send_acquire,
3792 .compile_policy = pfkey_compile_policy,
3793 .new_mapping = pfkey_send_new_mapping,
3794 .notify_policy = pfkey_send_policy_notify,
3795 .migrate = pfkey_send_migrate,
3796 };
3797
3798 static void __exit ipsec_pfkey_exit(void)
3799 {
3800 xfrm_unregister_km(&pfkeyv2_mgr);
3801 remove_proc_entry("pfkey", init_net.proc_net);
3802 sock_unregister(PF_KEY);
3803 proto_unregister(&key_proto);
3804 }
3805
3806 static int __init ipsec_pfkey_init(void)
3807 {
3808 int err = proto_register(&key_proto, 0);
3809
3810 if (err != 0)
3811 goto out;
3812
3813 err = sock_register(&pfkey_family_ops);
3814 if (err != 0)
3815 goto out_unregister_key_proto;
3816 #ifdef CONFIG_PROC_FS
3817 err = -ENOMEM;
3818 if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
3819 goto out_sock_unregister;
3820 #endif
3821 err = xfrm_register_km(&pfkeyv2_mgr);
3822 if (err != 0)
3823 goto out_remove_proc_entry;
3824 out:
3825 return err;
3826 out_remove_proc_entry:
3827 #ifdef CONFIG_PROC_FS
3828 remove_proc_entry("net/pfkey", NULL);
3829 out_sock_unregister:
3830 #endif
3831 sock_unregister(PF_KEY);
3832 out_unregister_key_proto:
3833 proto_unregister(&key_proto);
3834 goto out;
3835 }
3836
3837 module_init(ipsec_pfkey_init);
3838 module_exit(ipsec_pfkey_exit);
3839 MODULE_LICENSE("GPL");
3840 MODULE_ALIAS_NETPROTO(PF_KEY);
WRT350N Kernel Patches