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Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / key / af_key.c
blobe55e0441e4d9a14ee211a15c5331d093dbac613b
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 struct {
53 uint8_t msg_version;
54 uint32_t msg_pid;
55 int (*dump)(struct pfkey_sock *sk);
56 void (*done)(struct pfkey_sock *sk);
57 union {
58 struct xfrm_policy_walk policy;
59 struct xfrm_state_walk state;
60 } u;
61 struct sk_buff *skb;
62 } dump;
63 };
64
65 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
66 {
67 return (struct pfkey_sock *)sk;
68 }
69
70 static int pfkey_can_dump(struct sock *sk)
71 {
72 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
73 return 1;
74 return 0;
75 }
76
77 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
78 {
79 if (pfk->dump.dump) {
80 if (pfk->dump.skb) {
81 kfree_skb(pfk->dump.skb);
82 pfk->dump.skb = NULL;
83 }
84 pfk->dump.done(pfk);
85 pfk->dump.dump = NULL;
86 pfk->dump.done = NULL;
87 }
88 }
89
90 static void pfkey_sock_destruct(struct sock *sk)
91 {
92 pfkey_terminate_dump(pfkey_sk(sk));
93 skb_queue_purge(&sk->sk_receive_queue);
94
95 if (!sock_flag(sk, SOCK_DEAD)) {
96 printk("Attempt to release alive pfkey socket: %p\n", sk);
97 return;
98 }
99
100 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
101 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
102
103 atomic_dec(&pfkey_socks_nr);
104 }
105
106 static void pfkey_table_grab(void)
107 {
108 write_lock_bh(&pfkey_table_lock);
109
110 if (atomic_read(&pfkey_table_users)) {
111 DECLARE_WAITQUEUE(wait, current);
112
113 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
114 for(;;) {
115 set_current_state(TASK_UNINTERRUPTIBLE);
116 if (atomic_read(&pfkey_table_users) == 0)
117 break;
118 write_unlock_bh(&pfkey_table_lock);
119 schedule();
120 write_lock_bh(&pfkey_table_lock);
121 }
122
123 __set_current_state(TASK_RUNNING);
124 remove_wait_queue(&pfkey_table_wait, &wait);
125 }
126 }
127
128 static __inline__ void pfkey_table_ungrab(void)
129 {
130 write_unlock_bh(&pfkey_table_lock);
131 wake_up(&pfkey_table_wait);
132 }
133
134 static __inline__ void pfkey_lock_table(void)
135 {
136 /* read_lock() synchronizes us to pfkey_table_grab */
137
138 read_lock(&pfkey_table_lock);
139 atomic_inc(&pfkey_table_users);
140 read_unlock(&pfkey_table_lock);
141 }
142
143 static __inline__ void pfkey_unlock_table(void)
144 {
145 if (atomic_dec_and_test(&pfkey_table_users))
146 wake_up(&pfkey_table_wait);
147 }
148
149
150 static const struct proto_ops pfkey_ops;
151
152 static void pfkey_insert(struct sock *sk)
153 {
154 pfkey_table_grab();
155 sk_add_node(sk, &pfkey_table);
156 pfkey_table_ungrab();
157 }
158
159 static void pfkey_remove(struct sock *sk)
160 {
161 pfkey_table_grab();
162 sk_del_node_init(sk);
163 pfkey_table_ungrab();
164 }
165
166 static struct proto key_proto = {
167 .name = "KEY",
168 .owner = THIS_MODULE,
169 .obj_size = sizeof(struct pfkey_sock),
170 };
171
172 static int pfkey_create(struct net *net, struct socket *sock, int protocol)
173 {
174 struct sock *sk;
175 int err;
176
177 if (net != &init_net)
178 return -EAFNOSUPPORT;
179
180 if (!capable(CAP_NET_ADMIN))
181 return -EPERM;
182 if (sock->type != SOCK_RAW)
183 return -ESOCKTNOSUPPORT;
184 if (protocol != PF_KEY_V2)
185 return -EPROTONOSUPPORT;
186
187 err = -ENOMEM;
188 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
189 if (sk == NULL)
190 goto out;
191
192 sock->ops = &pfkey_ops;
193 sock_init_data(sock, sk);
194
195 sk->sk_family = PF_KEY;
196 sk->sk_destruct = pfkey_sock_destruct;
197
198 atomic_inc(&pfkey_socks_nr);
199
200 pfkey_insert(sk);
201
202 return 0;
203 out:
204 return err;
205 }
206
207 static int pfkey_release(struct socket *sock)
208 {
209 struct sock *sk = sock->sk;
210
211 if (!sk)
212 return 0;
213
214 pfkey_remove(sk);
215
216 sock_orphan(sk);
217 sock->sk = NULL;
218 skb_queue_purge(&sk->sk_write_queue);
219 sock_put(sk);
220
221 return 0;
222 }
223
224 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
225 gfp_t allocation, struct sock *sk)
226 {
227 int err = -ENOBUFS;
228
229 sock_hold(sk);
230 if (*skb2 == NULL) {
231 if (atomic_read(&skb->users) != 1) {
232 *skb2 = skb_clone(skb, allocation);
233 } else {
234 *skb2 = skb;
235 atomic_inc(&skb->users);
236 }
237 }
238 if (*skb2 != NULL) {
239 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
240 skb_orphan(*skb2);
241 skb_set_owner_r(*skb2, sk);
242 skb_queue_tail(&sk->sk_receive_queue, *skb2);
243 sk->sk_data_ready(sk, (*skb2)->len);
244 *skb2 = NULL;
245 err = 0;
246 }
247 }
248 sock_put(sk);
249 return err;
250 }
251
252 /* Send SKB to all pfkey sockets matching selected criteria. */
253 #define BROADCAST_ALL 0
254 #define BROADCAST_ONE 1
255 #define BROADCAST_REGISTERED 2
256 #define BROADCAST_PROMISC_ONLY 4
257 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
258 int broadcast_flags, struct sock *one_sk)
259 {
260 struct sock *sk;
261 struct hlist_node *node;
262 struct sk_buff *skb2 = NULL;
263 int err = -ESRCH;
264
265 /* XXX Do we need something like netlink_overrun? I think
266 * XXX PF_KEY socket apps will not mind current behavior.
267 */
268 if (!skb)
269 return -ENOMEM;
270
271 pfkey_lock_table();
272 sk_for_each(sk, node, &pfkey_table) {
273 struct pfkey_sock *pfk = pfkey_sk(sk);
274 int err2;
275
276 /* Yes, it means that if you are meant to receive this
277 * pfkey message you receive it twice as promiscuous
278 * socket.
279 */
280 if (pfk->promisc)
281 pfkey_broadcast_one(skb, &skb2, allocation, sk);
282
283 /* the exact target will be processed later */
284 if (sk == one_sk)
285 continue;
286 if (broadcast_flags != BROADCAST_ALL) {
287 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
288 continue;
289 if ((broadcast_flags & BROADCAST_REGISTERED) &&
290 !pfk->registered)
291 continue;
292 if (broadcast_flags & BROADCAST_ONE)
293 continue;
294 }
295
296 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
297
298 /* Error is cleare after succecful sending to at least one
299 * registered KM */
300 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
301 err = err2;
302 }
303 pfkey_unlock_table();
304
305 if (one_sk != NULL)
306 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
307
308 if (skb2)
309 kfree_skb(skb2);
310 kfree_skb(skb);
311 return err;
312 }
313
314 static int pfkey_do_dump(struct pfkey_sock *pfk)
315 {
316 struct sadb_msg *hdr;
317 int rc;
318
319 rc = pfk->dump.dump(pfk);
320 if (rc == -ENOBUFS)
321 return 0;
322
323 if (pfk->dump.skb) {
324 if (!pfkey_can_dump(&pfk->sk))
325 return 0;
326
327 hdr = (struct sadb_msg *) pfk->dump.skb->data;
328 hdr->sadb_msg_seq = 0;
329 hdr->sadb_msg_errno = rc;
330 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
331 &pfk->sk);
332 pfk->dump.skb = NULL;
333 }
334
335 pfkey_terminate_dump(pfk);
336 return rc;
337 }
338
339 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
340 {
341 *new = *orig;
342 }
343
344 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
345 {
346 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
347 struct sadb_msg *hdr;
348
349 if (!skb)
350 return -ENOBUFS;
351
352 /* Woe be to the platform trying to support PFKEY yet
353 * having normal errnos outside the 1-255 range, inclusive.
354 */
355 err = -err;
356 if (err == ERESTARTSYS ||
357 err == ERESTARTNOHAND ||
358 err == ERESTARTNOINTR)
359 err = EINTR;
360 if (err >= 512)
361 err = EINVAL;
362 BUG_ON(err <= 0 || err >= 256);
363
364 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
365 pfkey_hdr_dup(hdr, orig);
366 hdr->sadb_msg_errno = (uint8_t) err;
367 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
368 sizeof(uint64_t));
369
370 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
371
372 return 0;
373 }
374
375 static u8 sadb_ext_min_len[] = {
376 [SADB_EXT_RESERVED] = (u8) 0,
377 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
378 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
379 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
380 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
381 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
382 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
383 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
384 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
385 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
386 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
387 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
388 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
389 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
390 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
391 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
392 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
393 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
394 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
395 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
396 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
397 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
398 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
399 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
400 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
401 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
402 };
403
404 /* Verify sadb_address_{len,prefixlen} against sa_family. */
405 static int verify_address_len(void *p)
406 {
407 struct sadb_address *sp = p;
408 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
409 struct sockaddr_in *sin;
410 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
411 struct sockaddr_in6 *sin6;
412 #endif
413 int len;
414
415 switch (addr->sa_family) {
416 case AF_INET:
417 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
418 if (sp->sadb_address_len != len ||
419 sp->sadb_address_prefixlen > 32)
420 return -EINVAL;
421 break;
422 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
423 case AF_INET6:
424 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
425 if (sp->sadb_address_len != len ||
426 sp->sadb_address_prefixlen > 128)
427 return -EINVAL;
428 break;
429 #endif
430 default:
431 /* It is user using kernel to keep track of security
432 * associations for another protocol, such as
433 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
434 * lengths.
435 *
436 * XXX Actually, association/policy database is not yet
437 * XXX able to cope with arbitrary sockaddr families.
438 * XXX When it can, remove this -EINVAL. -DaveM
439 */
440 return -EINVAL;
441 break;
442 }
443
444 return 0;
445 }
446
447 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
448 {
449 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
450 sec_ctx->sadb_x_ctx_len,
451 sizeof(uint64_t));
452 }
453
454 static inline int verify_sec_ctx_len(void *p)
455 {
456 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
457 int len = sec_ctx->sadb_x_ctx_len;
458
459 if (len > PAGE_SIZE)
460 return -EINVAL;
461
462 len = pfkey_sec_ctx_len(sec_ctx);
463
464 if (sec_ctx->sadb_x_sec_len != len)
465 return -EINVAL;
466
467 return 0;
468 }
469
470 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
471 {
472 struct xfrm_user_sec_ctx *uctx = NULL;
473 int ctx_size = sec_ctx->sadb_x_ctx_len;
474
475 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
476
477 if (!uctx)
478 return NULL;
479
480 uctx->len = pfkey_sec_ctx_len(sec_ctx);
481 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
482 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
483 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
484 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
485 memcpy(uctx + 1, sec_ctx + 1,
486 uctx->ctx_len);
487
488 return uctx;
489 }
490
491 static int present_and_same_family(struct sadb_address *src,
492 struct sadb_address *dst)
493 {
494 struct sockaddr *s_addr, *d_addr;
495
496 if (!src || !dst)
497 return 0;
498
499 s_addr = (struct sockaddr *)(src + 1);
500 d_addr = (struct sockaddr *)(dst + 1);
501 if (s_addr->sa_family != d_addr->sa_family)
502 return 0;
503 if (s_addr->sa_family != AF_INET
504 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
505 && s_addr->sa_family != AF_INET6
506 #endif
507 )
508 return 0;
509
510 return 1;
511 }
512
513 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
514 {
515 char *p = (char *) hdr;
516 int len = skb->len;
517
518 len -= sizeof(*hdr);
519 p += sizeof(*hdr);
520 while (len > 0) {
521 struct sadb_ext *ehdr = (struct sadb_ext *) p;
522 uint16_t ext_type;
523 int ext_len;
524
525 ext_len = ehdr->sadb_ext_len;
526 ext_len *= sizeof(uint64_t);
527 ext_type = ehdr->sadb_ext_type;
528 if (ext_len < sizeof(uint64_t) ||
529 ext_len > len ||
530 ext_type == SADB_EXT_RESERVED)
531 return -EINVAL;
532
533 if (ext_type <= SADB_EXT_MAX) {
534 int min = (int) sadb_ext_min_len[ext_type];
535 if (ext_len < min)
536 return -EINVAL;
537 if (ext_hdrs[ext_type-1] != NULL)
538 return -EINVAL;
539 if (ext_type == SADB_EXT_ADDRESS_SRC ||
540 ext_type == SADB_EXT_ADDRESS_DST ||
541 ext_type == SADB_EXT_ADDRESS_PROXY ||
542 ext_type == SADB_X_EXT_NAT_T_OA) {
543 if (verify_address_len(p))
544 return -EINVAL;
545 }
546 if (ext_type == SADB_X_EXT_SEC_CTX) {
547 if (verify_sec_ctx_len(p))
548 return -EINVAL;
549 }
550 ext_hdrs[ext_type-1] = p;
551 }
552 p += ext_len;
553 len -= ext_len;
554 }
555
556 return 0;
557 }
558
559 static uint16_t
560 pfkey_satype2proto(uint8_t satype)
561 {
562 switch (satype) {
563 case SADB_SATYPE_UNSPEC:
564 return IPSEC_PROTO_ANY;
565 case SADB_SATYPE_AH:
566 return IPPROTO_AH;
567 case SADB_SATYPE_ESP:
568 return IPPROTO_ESP;
569 case SADB_X_SATYPE_IPCOMP:
570 return IPPROTO_COMP;
571 break;
572 default:
573 return 0;
574 }
575 /* NOTREACHED */
576 }
577
578 static uint8_t
579 pfkey_proto2satype(uint16_t proto)
580 {
581 switch (proto) {
582 case IPPROTO_AH:
583 return SADB_SATYPE_AH;
584 case IPPROTO_ESP:
585 return SADB_SATYPE_ESP;
586 case IPPROTO_COMP:
587 return SADB_X_SATYPE_IPCOMP;
588 break;
589 default:
590 return 0;
591 }
592 /* NOTREACHED */
593 }
594
595 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
596 * say specifically 'just raw sockets' as we encode them as 255.
597 */
598
599 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
600 {
601 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
602 }
603
604 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
605 {
606 return (proto ? proto : IPSEC_PROTO_ANY);
607 }
608
609 static inline int pfkey_sockaddr_len(sa_family_t family)
610 {
611 switch (family) {
612 case AF_INET:
613 return sizeof(struct sockaddr_in);
614 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
615 case AF_INET6:
616 return sizeof(struct sockaddr_in6);
617 #endif
618 }
619 return 0;
620 }
621
622 static
623 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
624 {
625 switch (sa->sa_family) {
626 case AF_INET:
627 xaddr->a4 =
628 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
629 return AF_INET;
630 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
631 case AF_INET6:
632 memcpy(xaddr->a6,
633 &((struct sockaddr_in6 *)sa)->sin6_addr,
634 sizeof(struct in6_addr));
635 return AF_INET6;
636 #endif
637 }
638 return 0;
639 }
640
641 static
642 int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
643 {
644 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
645 xaddr);
646 }
647
648 static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
649 {
650 struct sadb_sa *sa;
651 struct sadb_address *addr;
652 uint16_t proto;
653 unsigned short family;
654 xfrm_address_t *xaddr;
655
656 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
657 if (sa == NULL)
658 return NULL;
659
660 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
661 if (proto == 0)
662 return NULL;
663
664 /* sadb_address_len should be checked by caller */
665 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
666 if (addr == NULL)
667 return NULL;
668
669 family = ((struct sockaddr *)(addr + 1))->sa_family;
670 switch (family) {
671 case AF_INET:
672 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
673 break;
674 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
675 case AF_INET6:
676 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
677 break;
678 #endif
679 default:
680 xaddr = NULL;
681 }
682
683 if (!xaddr)
684 return NULL;
685
686 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
687 }
688
689 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
690
691 static int
692 pfkey_sockaddr_size(sa_family_t family)
693 {
694 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
695 }
696
697 static inline int pfkey_mode_from_xfrm(int mode)
698 {
699 switch(mode) {
700 case XFRM_MODE_TRANSPORT:
701 return IPSEC_MODE_TRANSPORT;
702 case XFRM_MODE_TUNNEL:
703 return IPSEC_MODE_TUNNEL;
704 case XFRM_MODE_BEET:
705 return IPSEC_MODE_BEET;
706 default:
707 return -1;
708 }
709 }
710
711 static inline int pfkey_mode_to_xfrm(int mode)
712 {
713 switch(mode) {
714 case IPSEC_MODE_ANY: /*XXX*/
715 case IPSEC_MODE_TRANSPORT:
716 return XFRM_MODE_TRANSPORT;
717 case IPSEC_MODE_TUNNEL:
718 return XFRM_MODE_TUNNEL;
719 case IPSEC_MODE_BEET:
720 return XFRM_MODE_BEET;
721 default:
722 return -1;
723 }
724 }
725
726 static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port,
727 struct sockaddr *sa,
728 unsigned short family)
729 {
730 switch (family) {
731 case AF_INET:
732 {
733 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
734 sin->sin_family = AF_INET;
735 sin->sin_port = port;
736 sin->sin_addr.s_addr = xaddr->a4;
737 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
738 return 32;
739 }
740 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
741 case AF_INET6:
742 {
743 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
744 sin6->sin6_family = AF_INET6;
745 sin6->sin6_port = port;
746 sin6->sin6_flowinfo = 0;
747 ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6);
748 sin6->sin6_scope_id = 0;
749 return 128;
750 }
751 #endif
752 }
753 return 0;
754 }
755
756 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
757 int add_keys, int hsc)
758 {
759 struct sk_buff *skb;
760 struct sadb_msg *hdr;
761 struct sadb_sa *sa;
762 struct sadb_lifetime *lifetime;
763 struct sadb_address *addr;
764 struct sadb_key *key;
765 struct sadb_x_sa2 *sa2;
766 struct sadb_x_sec_ctx *sec_ctx;
767 struct xfrm_sec_ctx *xfrm_ctx;
768 int ctx_size = 0;
769 int size;
770 int auth_key_size = 0;
771 int encrypt_key_size = 0;
772 int sockaddr_size;
773 struct xfrm_encap_tmpl *natt = NULL;
774 int mode;
775
776 /* address family check */
777 sockaddr_size = pfkey_sockaddr_size(x->props.family);
778 if (!sockaddr_size)
779 return ERR_PTR(-EINVAL);
780
781 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
782 key(AE), (identity(SD),) (sensitivity)> */
783 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
784 sizeof(struct sadb_lifetime) +
785 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
786 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
787 sizeof(struct sadb_address)*2 +
788 sockaddr_size*2 +
789 sizeof(struct sadb_x_sa2);
790
791 if ((xfrm_ctx = x->security)) {
792 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
793 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
794 }
795
796 /* identity & sensitivity */
797 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
798 size += sizeof(struct sadb_address) + sockaddr_size;
799
800 if (add_keys) {
801 if (x->aalg && x->aalg->alg_key_len) {
802 auth_key_size =
803 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
804 size += sizeof(struct sadb_key) + auth_key_size;
805 }
806 if (x->ealg && x->ealg->alg_key_len) {
807 encrypt_key_size =
808 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
809 size += sizeof(struct sadb_key) + encrypt_key_size;
810 }
811 }
812 if (x->encap)
813 natt = x->encap;
814
815 if (natt && natt->encap_type) {
816 size += sizeof(struct sadb_x_nat_t_type);
817 size += sizeof(struct sadb_x_nat_t_port);
818 size += sizeof(struct sadb_x_nat_t_port);
819 }
820
821 skb = alloc_skb(size + 16, GFP_ATOMIC);
822 if (skb == NULL)
823 return ERR_PTR(-ENOBUFS);
824
825 /* call should fill header later */
826 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
827 memset(hdr, 0, size); /* XXX do we need this ? */
828 hdr->sadb_msg_len = size / sizeof(uint64_t);
829
830 /* sa */
831 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
832 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
833 sa->sadb_sa_exttype = SADB_EXT_SA;
834 sa->sadb_sa_spi = x->id.spi;
835 sa->sadb_sa_replay = x->props.replay_window;
836 switch (x->km.state) {
837 case XFRM_STATE_VALID:
838 sa->sadb_sa_state = x->km.dying ?
839 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
840 break;
841 case XFRM_STATE_ACQ:
842 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
843 break;
844 default:
845 sa->sadb_sa_state = SADB_SASTATE_DEAD;
846 break;
847 }
848 sa->sadb_sa_auth = 0;
849 if (x->aalg) {
850 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
851 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
852 }
853 sa->sadb_sa_encrypt = 0;
854 BUG_ON(x->ealg && x->calg);
855 if (x->ealg) {
856 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
857 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
858 }
859 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
860 if (x->calg) {
861 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
862 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
863 }
864
865 sa->sadb_sa_flags = 0;
866 if (x->props.flags & XFRM_STATE_NOECN)
867 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
868 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
869 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
870 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
871 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
872
873 /* hard time */
874 if (hsc & 2) {
875 lifetime = (struct sadb_lifetime *) skb_put(skb,
876 sizeof(struct sadb_lifetime));
877 lifetime->sadb_lifetime_len =
878 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
879 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
880 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
881 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
882 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
883 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
884 }
885 /* soft time */
886 if (hsc & 1) {
887 lifetime = (struct sadb_lifetime *) skb_put(skb,
888 sizeof(struct sadb_lifetime));
889 lifetime->sadb_lifetime_len =
890 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
891 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
892 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
893 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
894 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
895 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
896 }
897 /* current time */
898 lifetime = (struct sadb_lifetime *) skb_put(skb,
899 sizeof(struct sadb_lifetime));
900 lifetime->sadb_lifetime_len =
901 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
902 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
903 lifetime->sadb_lifetime_allocations = x->curlft.packets;
904 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
905 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
906 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
907 /* src address */
908 addr = (struct sadb_address*) skb_put(skb,
909 sizeof(struct sadb_address)+sockaddr_size);
910 addr->sadb_address_len =
911 (sizeof(struct sadb_address)+sockaddr_size)/
912 sizeof(uint64_t);
913 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
914 /* "if the ports are non-zero, then the sadb_address_proto field,
915 normally zero, MUST be filled in with the transport
916 protocol's number." - RFC2367 */
917 addr->sadb_address_proto = 0;
918 addr->sadb_address_reserved = 0;
919
920 addr->sadb_address_prefixlen =
921 pfkey_sockaddr_fill(&x->props.saddr, 0,
922 (struct sockaddr *) (addr + 1),
923 x->props.family);
924 if (!addr->sadb_address_prefixlen)
925 BUG();
926
927 /* dst address */
928 addr = (struct sadb_address*) skb_put(skb,
929 sizeof(struct sadb_address)+sockaddr_size);
930 addr->sadb_address_len =
931 (sizeof(struct sadb_address)+sockaddr_size)/
932 sizeof(uint64_t);
933 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
934 addr->sadb_address_proto = 0;
935 addr->sadb_address_reserved = 0;
936
937 addr->sadb_address_prefixlen =
938 pfkey_sockaddr_fill(&x->id.daddr, 0,
939 (struct sockaddr *) (addr + 1),
940 x->props.family);
941 if (!addr->sadb_address_prefixlen)
942 BUG();
943
944 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
945 x->props.family)) {
946 addr = (struct sadb_address*) skb_put(skb,
947 sizeof(struct sadb_address)+sockaddr_size);
948 addr->sadb_address_len =
949 (sizeof(struct sadb_address)+sockaddr_size)/
950 sizeof(uint64_t);
951 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
952 addr->sadb_address_proto =
953 pfkey_proto_from_xfrm(x->sel.proto);
954 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
955 addr->sadb_address_reserved = 0;
956
957 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
958 (struct sockaddr *) (addr + 1),
959 x->props.family);
960 }
961
962 /* auth key */
963 if (add_keys && auth_key_size) {
964 key = (struct sadb_key *) skb_put(skb,
965 sizeof(struct sadb_key)+auth_key_size);
966 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
967 sizeof(uint64_t);
968 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
969 key->sadb_key_bits = x->aalg->alg_key_len;
970 key->sadb_key_reserved = 0;
971 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
972 }
973 /* encrypt key */
974 if (add_keys && encrypt_key_size) {
975 key = (struct sadb_key *) skb_put(skb,
976 sizeof(struct sadb_key)+encrypt_key_size);
977 key->sadb_key_len = (sizeof(struct sadb_key) +
978 encrypt_key_size) / sizeof(uint64_t);
979 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
980 key->sadb_key_bits = x->ealg->alg_key_len;
981 key->sadb_key_reserved = 0;
982 memcpy(key + 1, x->ealg->alg_key,
983 (x->ealg->alg_key_len+7)/8);
984 }
985
986 /* sa */
987 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
988 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
989 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
990 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
991 kfree_skb(skb);
992 return ERR_PTR(-EINVAL);
993 }
994 sa2->sadb_x_sa2_mode = mode;
995 sa2->sadb_x_sa2_reserved1 = 0;
996 sa2->sadb_x_sa2_reserved2 = 0;
997 sa2->sadb_x_sa2_sequence = 0;
998 sa2->sadb_x_sa2_reqid = x->props.reqid;
999
1000 if (natt && natt->encap_type) {
1001 struct sadb_x_nat_t_type *n_type;
1002 struct sadb_x_nat_t_port *n_port;
1003
1004 /* type */
1005 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
1006 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1007 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1008 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1009 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1010 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1011 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1012
1013 /* source port */
1014 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1015 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1016 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1017 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1018 n_port->sadb_x_nat_t_port_reserved = 0;
1019
1020 /* dest port */
1021 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1022 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1023 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1024 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1025 n_port->sadb_x_nat_t_port_reserved = 0;
1026 }
1027
1028 /* security context */
1029 if (xfrm_ctx) {
1030 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1031 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1032 sec_ctx->sadb_x_sec_len =
1033 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1034 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1035 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1036 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1037 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1038 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1039 xfrm_ctx->ctx_len);
1040 }
1041
1042 return skb;
1043 }
1044
1045
1046 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1047 {
1048 struct sk_buff *skb;
1049
1050 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1051
1052 return skb;
1053 }
1054
1055 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1056 int hsc)
1057 {
1058 return __pfkey_xfrm_state2msg(x, 0, hsc);
1059 }
1060
1061 static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1062 void **ext_hdrs)
1063 {
1064 struct xfrm_state *x;
1065 struct sadb_lifetime *lifetime;
1066 struct sadb_sa *sa;
1067 struct sadb_key *key;
1068 struct sadb_x_sec_ctx *sec_ctx;
1069 uint16_t proto;
1070 int err;
1071
1072
1073 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1074 if (!sa ||
1075 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1076 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1077 return ERR_PTR(-EINVAL);
1078 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1079 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1080 return ERR_PTR(-EINVAL);
1081 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1082 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1083 return ERR_PTR(-EINVAL);
1084 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1085 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1086 return ERR_PTR(-EINVAL);
1087
1088 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1089 if (proto == 0)
1090 return ERR_PTR(-EINVAL);
1091
1092 /* default error is no buffer space */
1093 err = -ENOBUFS;
1094
1095 /* RFC2367:
1096
1097 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1098 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1099 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1100 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1101 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1102 not true.
1103
1104 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1105 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1106 */
1107 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1108 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1109 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1110 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1111 return ERR_PTR(-EINVAL);
1112 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1113 if (key != NULL &&
1114 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1115 ((key->sadb_key_bits+7) / 8 == 0 ||
1116 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1117 return ERR_PTR(-EINVAL);
1118 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1119 if (key != NULL &&
1120 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1121 ((key->sadb_key_bits+7) / 8 == 0 ||
1122 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1123 return ERR_PTR(-EINVAL);
1124
1125 x = xfrm_state_alloc();
1126 if (x == NULL)
1127 return ERR_PTR(-ENOBUFS);
1128
1129 x->id.proto = proto;
1130 x->id.spi = sa->sadb_sa_spi;
1131 x->props.replay_window = sa->sadb_sa_replay;
1132 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1133 x->props.flags |= XFRM_STATE_NOECN;
1134 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1135 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1136 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1137 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1138
1139 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1140 if (lifetime != NULL) {
1141 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1142 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1143 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1144 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1145 }
1146 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1147 if (lifetime != NULL) {
1148 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1149 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1150 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1151 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1152 }
1153
1154 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1155 if (sec_ctx != NULL) {
1156 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1157
1158 if (!uctx)
1159 goto out;
1160
1161 err = security_xfrm_state_alloc(x, uctx);
1162 kfree(uctx);
1163
1164 if (err)
1165 goto out;
1166 }
1167
1168 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1169 if (sa->sadb_sa_auth) {
1170 int keysize = 0;
1171 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1172 if (!a) {
1173 err = -ENOSYS;
1174 goto out;
1175 }
1176 if (key)
1177 keysize = (key->sadb_key_bits + 7) / 8;
1178 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1179 if (!x->aalg)
1180 goto out;
1181 strcpy(x->aalg->alg_name, a->name);
1182 x->aalg->alg_key_len = 0;
1183 if (key) {
1184 x->aalg->alg_key_len = key->sadb_key_bits;
1185 memcpy(x->aalg->alg_key, key+1, keysize);
1186 }
1187 x->props.aalgo = sa->sadb_sa_auth;
1188 /* x->algo.flags = sa->sadb_sa_flags; */
1189 }
1190 if (sa->sadb_sa_encrypt) {
1191 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1192 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1193 if (!a) {
1194 err = -ENOSYS;
1195 goto out;
1196 }
1197 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1198 if (!x->calg)
1199 goto out;
1200 strcpy(x->calg->alg_name, a->name);
1201 x->props.calgo = sa->sadb_sa_encrypt;
1202 } else {
1203 int keysize = 0;
1204 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1205 if (!a) {
1206 err = -ENOSYS;
1207 goto out;
1208 }
1209 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1210 if (key)
1211 keysize = (key->sadb_key_bits + 7) / 8;
1212 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1213 if (!x->ealg)
1214 goto out;
1215 strcpy(x->ealg->alg_name, a->name);
1216 x->ealg->alg_key_len = 0;
1217 if (key) {
1218 x->ealg->alg_key_len = key->sadb_key_bits;
1219 memcpy(x->ealg->alg_key, key+1, keysize);
1220 }
1221 x->props.ealgo = sa->sadb_sa_encrypt;
1222 }
1223 }
1224 /* x->algo.flags = sa->sadb_sa_flags; */
1225
1226 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1227 &x->props.saddr);
1228 if (!x->props.family) {
1229 err = -EAFNOSUPPORT;
1230 goto out;
1231 }
1232 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1233 &x->id.daddr);
1234
1235 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1236 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1237 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1238 if (mode < 0) {
1239 err = -EINVAL;
1240 goto out;
1241 }
1242 x->props.mode = mode;
1243 x->props.reqid = sa2->sadb_x_sa2_reqid;
1244 }
1245
1246 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1247 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1248
1249 /* Nobody uses this, but we try. */
1250 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1251 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1252 }
1253
1254 if (!x->sel.family)
1255 x->sel.family = x->props.family;
1256
1257 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1258 struct sadb_x_nat_t_type* n_type;
1259 struct xfrm_encap_tmpl *natt;
1260
1261 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1262 if (!x->encap)
1263 goto out;
1264
1265 natt = x->encap;
1266 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1267 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1268
1269 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1270 struct sadb_x_nat_t_port* n_port =
1271 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1272 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1273 }
1274 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1275 struct sadb_x_nat_t_port* n_port =
1276 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1277 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1278 }
1279 }
1280
1281 err = xfrm_init_state(x);
1282 if (err)
1283 goto out;
1284
1285 x->km.seq = hdr->sadb_msg_seq;
1286 return x;
1287
1288 out:
1289 x->km.state = XFRM_STATE_DEAD;
1290 xfrm_state_put(x);
1291 return ERR_PTR(err);
1292 }
1293
1294 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1295 {
1296 return -EOPNOTSUPP;
1297 }
1298
1299 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1300 {
1301 struct sk_buff *resp_skb;
1302 struct sadb_x_sa2 *sa2;
1303 struct sadb_address *saddr, *daddr;
1304 struct sadb_msg *out_hdr;
1305 struct sadb_spirange *range;
1306 struct xfrm_state *x = NULL;
1307 int mode;
1308 int err;
1309 u32 min_spi, max_spi;
1310 u32 reqid;
1311 u8 proto;
1312 unsigned short family;
1313 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1314
1315 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1316 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1317 return -EINVAL;
1318
1319 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1320 if (proto == 0)
1321 return -EINVAL;
1322
1323 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1324 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1325 if (mode < 0)
1326 return -EINVAL;
1327 reqid = sa2->sadb_x_sa2_reqid;
1328 } else {
1329 mode = 0;
1330 reqid = 0;
1331 }
1332
1333 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1334 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1335
1336 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1337 switch (family) {
1338 case AF_INET:
1339 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1340 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1341 break;
1342 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1343 case AF_INET6:
1344 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1345 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1346 break;
1347 #endif
1348 }
1349
1350 if (hdr->sadb_msg_seq) {
1351 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1352 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1353 xfrm_state_put(x);
1354 x = NULL;
1355 }
1356 }
1357
1358 if (!x)
1359 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1360
1361 if (x == NULL)
1362 return -ENOENT;
1363
1364 min_spi = 0x100;
1365 max_spi = 0x0fffffff;
1366
1367 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1368 if (range) {
1369 min_spi = range->sadb_spirange_min;
1370 max_spi = range->sadb_spirange_max;
1371 }
1372
1373 err = xfrm_alloc_spi(x, min_spi, max_spi);
1374 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1375
1376 if (IS_ERR(resp_skb)) {
1377 xfrm_state_put(x);
1378 return PTR_ERR(resp_skb);
1379 }
1380
1381 out_hdr = (struct sadb_msg *) resp_skb->data;
1382 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1383 out_hdr->sadb_msg_type = SADB_GETSPI;
1384 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1385 out_hdr->sadb_msg_errno = 0;
1386 out_hdr->sadb_msg_reserved = 0;
1387 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1388 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1389
1390 xfrm_state_put(x);
1391
1392 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1393
1394 return 0;
1395 }
1396
1397 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1398 {
1399 struct xfrm_state *x;
1400
1401 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1402 return -EOPNOTSUPP;
1403
1404 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1405 return 0;
1406
1407 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1408 if (x == NULL)
1409 return 0;
1410
1411 spin_lock_bh(&x->lock);
1412 if (x->km.state == XFRM_STATE_ACQ) {
1413 x->km.state = XFRM_STATE_ERROR;
1414 wake_up(&km_waitq);
1415 }
1416 spin_unlock_bh(&x->lock);
1417 xfrm_state_put(x);
1418 return 0;
1419 }
1420
1421 static inline int event2poltype(int event)
1422 {
1423 switch (event) {
1424 case XFRM_MSG_DELPOLICY:
1425 return SADB_X_SPDDELETE;
1426 case XFRM_MSG_NEWPOLICY:
1427 return SADB_X_SPDADD;
1428 case XFRM_MSG_UPDPOLICY:
1429 return SADB_X_SPDUPDATE;
1430 case XFRM_MSG_POLEXPIRE:
1431 // return SADB_X_SPDEXPIRE;
1432 default:
1433 printk("pfkey: Unknown policy event %d\n", event);
1434 break;
1435 }
1436
1437 return 0;
1438 }
1439
1440 static inline int event2keytype(int event)
1441 {
1442 switch (event) {
1443 case XFRM_MSG_DELSA:
1444 return SADB_DELETE;
1445 case XFRM_MSG_NEWSA:
1446 return SADB_ADD;
1447 case XFRM_MSG_UPDSA:
1448 return SADB_UPDATE;
1449 case XFRM_MSG_EXPIRE:
1450 return SADB_EXPIRE;
1451 default:
1452 printk("pfkey: Unknown SA event %d\n", event);
1453 break;
1454 }
1455
1456 return 0;
1457 }
1458
1459 /* ADD/UPD/DEL */
1460 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1461 {
1462 struct sk_buff *skb;
1463 struct sadb_msg *hdr;
1464
1465 skb = pfkey_xfrm_state2msg(x);
1466
1467 if (IS_ERR(skb))
1468 return PTR_ERR(skb);
1469
1470 hdr = (struct sadb_msg *) skb->data;
1471 hdr->sadb_msg_version = PF_KEY_V2;
1472 hdr->sadb_msg_type = event2keytype(c->event);
1473 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1474 hdr->sadb_msg_errno = 0;
1475 hdr->sadb_msg_reserved = 0;
1476 hdr->sadb_msg_seq = c->seq;
1477 hdr->sadb_msg_pid = c->pid;
1478
1479 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1480
1481 return 0;
1482 }
1483
1484 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1485 {
1486 struct xfrm_state *x;
1487 int err;
1488 struct km_event c;
1489
1490 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1491 if (IS_ERR(x))
1492 return PTR_ERR(x);
1493
1494 xfrm_state_hold(x);
1495 if (hdr->sadb_msg_type == SADB_ADD)
1496 err = xfrm_state_add(x);
1497 else
1498 err = xfrm_state_update(x);
1499
1500 xfrm_audit_state_add(x, err ? 0 : 1,
1501 audit_get_loginuid(current),
1502 audit_get_sessionid(current), 0);
1503
1504 if (err < 0) {
1505 x->km.state = XFRM_STATE_DEAD;
1506 __xfrm_state_put(x);
1507 goto out;
1508 }
1509
1510 if (hdr->sadb_msg_type == SADB_ADD)
1511 c.event = XFRM_MSG_NEWSA;
1512 else
1513 c.event = XFRM_MSG_UPDSA;
1514 c.seq = hdr->sadb_msg_seq;
1515 c.pid = hdr->sadb_msg_pid;
1516 km_state_notify(x, &c);
1517 out:
1518 xfrm_state_put(x);
1519 return err;
1520 }
1521
1522 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1523 {
1524 struct xfrm_state *x;
1525 struct km_event c;
1526 int err;
1527
1528 if (!ext_hdrs[SADB_EXT_SA-1] ||
1529 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1530 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1531 return -EINVAL;
1532
1533 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1534 if (x == NULL)
1535 return -ESRCH;
1536
1537 if ((err = security_xfrm_state_delete(x)))
1538 goto out;
1539
1540 if (xfrm_state_kern(x)) {
1541 err = -EPERM;
1542 goto out;
1543 }
1544
1545 err = xfrm_state_delete(x);
1546
1547 if (err < 0)
1548 goto out;
1549
1550 c.seq = hdr->sadb_msg_seq;
1551 c.pid = hdr->sadb_msg_pid;
1552 c.event = XFRM_MSG_DELSA;
1553 km_state_notify(x, &c);
1554 out:
1555 xfrm_audit_state_delete(x, err ? 0 : 1,
1556 audit_get_loginuid(current),
1557 audit_get_sessionid(current), 0);
1558 xfrm_state_put(x);
1559
1560 return err;
1561 }
1562
1563 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1564 {
1565 __u8 proto;
1566 struct sk_buff *out_skb;
1567 struct sadb_msg *out_hdr;
1568 struct xfrm_state *x;
1569
1570 if (!ext_hdrs[SADB_EXT_SA-1] ||
1571 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1572 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1573 return -EINVAL;
1574
1575 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1576 if (x == NULL)
1577 return -ESRCH;
1578
1579 out_skb = pfkey_xfrm_state2msg(x);
1580 proto = x->id.proto;
1581 xfrm_state_put(x);
1582 if (IS_ERR(out_skb))
1583 return PTR_ERR(out_skb);
1584
1585 out_hdr = (struct sadb_msg *) out_skb->data;
1586 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1587 out_hdr->sadb_msg_type = SADB_GET;
1588 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1589 out_hdr->sadb_msg_errno = 0;
1590 out_hdr->sadb_msg_reserved = 0;
1591 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1592 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1593 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1594
1595 return 0;
1596 }
1597
1598 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1599 gfp_t allocation)
1600 {
1601 struct sk_buff *skb;
1602 struct sadb_msg *hdr;
1603 int len, auth_len, enc_len, i;
1604
1605 auth_len = xfrm_count_auth_supported();
1606 if (auth_len) {
1607 auth_len *= sizeof(struct sadb_alg);
1608 auth_len += sizeof(struct sadb_supported);
1609 }
1610
1611 enc_len = xfrm_count_enc_supported();
1612 if (enc_len) {
1613 enc_len *= sizeof(struct sadb_alg);
1614 enc_len += sizeof(struct sadb_supported);
1615 }
1616
1617 len = enc_len + auth_len + sizeof(struct sadb_msg);
1618
1619 skb = alloc_skb(len + 16, allocation);
1620 if (!skb)
1621 goto out_put_algs;
1622
1623 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1624 pfkey_hdr_dup(hdr, orig);
1625 hdr->sadb_msg_errno = 0;
1626 hdr->sadb_msg_len = len / sizeof(uint64_t);
1627
1628 if (auth_len) {
1629 struct sadb_supported *sp;
1630 struct sadb_alg *ap;
1631
1632 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1633 ap = (struct sadb_alg *) (sp + 1);
1634
1635 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1636 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1637
1638 for (i = 0; ; i++) {
1639 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1640 if (!aalg)
1641 break;
1642 if (aalg->available)
1643 *ap++ = aalg->desc;
1644 }
1645 }
1646
1647 if (enc_len) {
1648 struct sadb_supported *sp;
1649 struct sadb_alg *ap;
1650
1651 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1652 ap = (struct sadb_alg *) (sp + 1);
1653
1654 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1655 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1656
1657 for (i = 0; ; i++) {
1658 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1659 if (!ealg)
1660 break;
1661 if (ealg->available)
1662 *ap++ = ealg->desc;
1663 }
1664 }
1665
1666 out_put_algs:
1667 return skb;
1668 }
1669
1670 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1671 {
1672 struct pfkey_sock *pfk = pfkey_sk(sk);
1673 struct sk_buff *supp_skb;
1674
1675 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1676 return -EINVAL;
1677
1678 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1679 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1680 return -EEXIST;
1681 pfk->registered |= (1<<hdr->sadb_msg_satype);
1682 }
1683
1684 xfrm_probe_algs();
1685
1686 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1687 if (!supp_skb) {
1688 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1689 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1690
1691 return -ENOBUFS;
1692 }
1693
1694 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1695
1696 return 0;
1697 }
1698
1699 static int key_notify_sa_flush(struct km_event *c)
1700 {
1701 struct sk_buff *skb;
1702 struct sadb_msg *hdr;
1703
1704 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1705 if (!skb)
1706 return -ENOBUFS;
1707 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1708 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1709 hdr->sadb_msg_type = SADB_FLUSH;
1710 hdr->sadb_msg_seq = c->seq;
1711 hdr->sadb_msg_pid = c->pid;
1712 hdr->sadb_msg_version = PF_KEY_V2;
1713 hdr->sadb_msg_errno = (uint8_t) 0;
1714 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1715
1716 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1717
1718 return 0;
1719 }
1720
1721 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1722 {
1723 unsigned proto;
1724 struct km_event c;
1725 struct xfrm_audit audit_info;
1726 int err;
1727
1728 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1729 if (proto == 0)
1730 return -EINVAL;
1731
1732 audit_info.loginuid = audit_get_loginuid(current);
1733 audit_info.sessionid = audit_get_sessionid(current);
1734 audit_info.secid = 0;
1735 err = xfrm_state_flush(proto, &audit_info);
1736 if (err)
1737 return err;
1738 c.data.proto = proto;
1739 c.seq = hdr->sadb_msg_seq;
1740 c.pid = hdr->sadb_msg_pid;
1741 c.event = XFRM_MSG_FLUSHSA;
1742 km_state_notify(NULL, &c);
1743
1744 return 0;
1745 }
1746
1747 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1748 {
1749 struct pfkey_sock *pfk = ptr;
1750 struct sk_buff *out_skb;
1751 struct sadb_msg *out_hdr;
1752
1753 if (!pfkey_can_dump(&pfk->sk))
1754 return -ENOBUFS;
1755
1756 out_skb = pfkey_xfrm_state2msg(x);
1757 if (IS_ERR(out_skb))
1758 return PTR_ERR(out_skb);
1759
1760 out_hdr = (struct sadb_msg *) out_skb->data;
1761 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1762 out_hdr->sadb_msg_type = SADB_DUMP;
1763 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1764 out_hdr->sadb_msg_errno = 0;
1765 out_hdr->sadb_msg_reserved = 0;
1766 out_hdr->sadb_msg_seq = count + 1;
1767 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
1768
1769 if (pfk->dump.skb)
1770 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1771 &pfk->sk);
1772 pfk->dump.skb = out_skb;
1773
1774 return 0;
1775 }
1776
1777 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1778 {
1779 return xfrm_state_walk(&pfk->dump.u.state, dump_sa, (void *) pfk);
1780 }
1781
1782 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1783 {
1784 xfrm_state_walk_done(&pfk->dump.u.state);
1785 }
1786
1787 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1788 {
1789 u8 proto;
1790 struct pfkey_sock *pfk = pfkey_sk(sk);
1791
1792 if (pfk->dump.dump != NULL)
1793 return -EBUSY;
1794
1795 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1796 if (proto == 0)
1797 return -EINVAL;
1798
1799 pfk->dump.msg_version = hdr->sadb_msg_version;
1800 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1801 pfk->dump.dump = pfkey_dump_sa;
1802 pfk->dump.done = pfkey_dump_sa_done;
1803 xfrm_state_walk_init(&pfk->dump.u.state, proto);
1804
1805 return pfkey_do_dump(pfk);
1806 }
1807
1808 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1809 {
1810 struct pfkey_sock *pfk = pfkey_sk(sk);
1811 int satype = hdr->sadb_msg_satype;
1812
1813 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1814 /* XXX we mangle packet... */
1815 hdr->sadb_msg_errno = 0;
1816 if (satype != 0 && satype != 1)
1817 return -EINVAL;
1818 pfk->promisc = satype;
1819 }
1820 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1821 return 0;
1822 }
1823
1824 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1825 {
1826 int i;
1827 u32 reqid = *(u32*)ptr;
1828
1829 for (i=0; i<xp->xfrm_nr; i++) {
1830 if (xp->xfrm_vec[i].reqid == reqid)
1831 return -EEXIST;
1832 }
1833 return 0;
1834 }
1835
1836 static u32 gen_reqid(void)
1837 {
1838 struct xfrm_policy_walk walk;
1839 u32 start;
1840 int rc;
1841 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1842
1843 start = reqid;
1844 do {
1845 ++reqid;
1846 if (reqid == 0)
1847 reqid = IPSEC_MANUAL_REQID_MAX+1;
1848 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1849 rc = xfrm_policy_walk(&walk, check_reqid, (void*)&reqid);
1850 xfrm_policy_walk_done(&walk);
1851 if (rc != -EEXIST)
1852 return reqid;
1853 } while (reqid != start);
1854 return 0;
1855 }
1856
1857 static int
1858 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1859 {
1860 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1861 int mode;
1862
1863 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1864 return -ELOOP;
1865
1866 if (rq->sadb_x_ipsecrequest_mode == 0)
1867 return -EINVAL;
1868
1869 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1870 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1871 return -EINVAL;
1872 t->mode = mode;
1873 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1874 t->optional = 1;
1875 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1876 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1877 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1878 t->reqid = 0;
1879 if (!t->reqid && !(t->reqid = gen_reqid()))
1880 return -ENOBUFS;
1881 }
1882
1883 /* addresses present only in tunnel mode */
1884 if (t->mode == XFRM_MODE_TUNNEL) {
1885 u8 *sa = (u8 *) (rq + 1);
1886 int family, socklen;
1887
1888 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1889 &t->saddr);
1890 if (!family)
1891 return -EINVAL;
1892
1893 socklen = pfkey_sockaddr_len(family);
1894 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1895 &t->id.daddr) != family)
1896 return -EINVAL;
1897 t->encap_family = family;
1898 } else
1899 t->encap_family = xp->family;
1900
1901 /* No way to set this via kame pfkey */
1902 t->allalgs = 1;
1903 xp->xfrm_nr++;
1904 return 0;
1905 }
1906
1907 static int
1908 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1909 {
1910 int err;
1911 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1912 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1913
1914 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1915 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1916 return err;
1917 len -= rq->sadb_x_ipsecrequest_len;
1918 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1919 }
1920 return 0;
1921 }
1922
1923 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1924 {
1925 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1926
1927 if (xfrm_ctx) {
1928 int len = sizeof(struct sadb_x_sec_ctx);
1929 len += xfrm_ctx->ctx_len;
1930 return PFKEY_ALIGN8(len);
1931 }
1932 return 0;
1933 }
1934
1935 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1936 {
1937 struct xfrm_tmpl *t;
1938 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1939 int socklen = 0;
1940 int i;
1941
1942 for (i=0; i<xp->xfrm_nr; i++) {
1943 t = xp->xfrm_vec + i;
1944 socklen += pfkey_sockaddr_len(t->encap_family);
1945 }
1946
1947 return sizeof(struct sadb_msg) +
1948 (sizeof(struct sadb_lifetime) * 3) +
1949 (sizeof(struct sadb_address) * 2) +
1950 (sockaddr_size * 2) +
1951 sizeof(struct sadb_x_policy) +
1952 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1953 (socklen * 2) +
1954 pfkey_xfrm_policy2sec_ctx_size(xp);
1955 }
1956
1957 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1958 {
1959 struct sk_buff *skb;
1960 int size;
1961
1962 size = pfkey_xfrm_policy2msg_size(xp);
1963
1964 skb = alloc_skb(size + 16, GFP_ATOMIC);
1965 if (skb == NULL)
1966 return ERR_PTR(-ENOBUFS);
1967
1968 return skb;
1969 }
1970
1971 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1972 {
1973 struct sadb_msg *hdr;
1974 struct sadb_address *addr;
1975 struct sadb_lifetime *lifetime;
1976 struct sadb_x_policy *pol;
1977 struct sadb_x_sec_ctx *sec_ctx;
1978 struct xfrm_sec_ctx *xfrm_ctx;
1979 int i;
1980 int size;
1981 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1982 int socklen = pfkey_sockaddr_len(xp->family);
1983
1984 size = pfkey_xfrm_policy2msg_size(xp);
1985
1986 /* call should fill header later */
1987 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1988 memset(hdr, 0, size); /* XXX do we need this ? */
1989
1990 /* src address */
1991 addr = (struct sadb_address*) skb_put(skb,
1992 sizeof(struct sadb_address)+sockaddr_size);
1993 addr->sadb_address_len =
1994 (sizeof(struct sadb_address)+sockaddr_size)/
1995 sizeof(uint64_t);
1996 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1997 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1998 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1999 addr->sadb_address_reserved = 0;
2000 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2001 xp->selector.sport,
2002 (struct sockaddr *) (addr + 1),
2003 xp->family))
2004 BUG();
2005
2006 /* dst address */
2007 addr = (struct sadb_address*) skb_put(skb,
2008 sizeof(struct sadb_address)+sockaddr_size);
2009 addr->sadb_address_len =
2010 (sizeof(struct sadb_address)+sockaddr_size)/
2011 sizeof(uint64_t);
2012 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2013 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2014 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2015 addr->sadb_address_reserved = 0;
2016
2017 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2018 (struct sockaddr *) (addr + 1),
2019 xp->family);
2020
2021 /* hard time */
2022 lifetime = (struct sadb_lifetime *) skb_put(skb,
2023 sizeof(struct sadb_lifetime));
2024 lifetime->sadb_lifetime_len =
2025 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2026 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2027 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2028 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2029 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2030 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2031 /* soft time */
2032 lifetime = (struct sadb_lifetime *) skb_put(skb,
2033 sizeof(struct sadb_lifetime));
2034 lifetime->sadb_lifetime_len =
2035 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2036 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2037 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2038 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2039 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2040 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2041 /* current time */
2042 lifetime = (struct sadb_lifetime *) skb_put(skb,
2043 sizeof(struct sadb_lifetime));
2044 lifetime->sadb_lifetime_len =
2045 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2046 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2047 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2048 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2049 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2050 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2051
2052 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2053 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2054 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2055 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2056 if (xp->action == XFRM_POLICY_ALLOW) {
2057 if (xp->xfrm_nr)
2058 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2059 else
2060 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2061 }
2062 pol->sadb_x_policy_dir = dir+1;
2063 pol->sadb_x_policy_id = xp->index;
2064 pol->sadb_x_policy_priority = xp->priority;
2065
2066 for (i=0; i<xp->xfrm_nr; i++) {
2067 struct sadb_x_ipsecrequest *rq;
2068 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2069 int req_size;
2070 int mode;
2071
2072 req_size = sizeof(struct sadb_x_ipsecrequest);
2073 if (t->mode == XFRM_MODE_TUNNEL) {
2074 socklen = pfkey_sockaddr_len(t->encap_family);
2075 req_size += socklen * 2;
2076 } else {
2077 size -= 2*socklen;
2078 socklen = 0;
2079 }
2080 rq = (void*)skb_put(skb, req_size);
2081 pol->sadb_x_policy_len += req_size/8;
2082 memset(rq, 0, sizeof(*rq));
2083 rq->sadb_x_ipsecrequest_len = req_size;
2084 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2085 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2086 return -EINVAL;
2087 rq->sadb_x_ipsecrequest_mode = mode;
2088 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2089 if (t->reqid)
2090 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2091 if (t->optional)
2092 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2093 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2094
2095 if (t->mode == XFRM_MODE_TUNNEL) {
2096 u8 *sa = (void *)(rq + 1);
2097 pfkey_sockaddr_fill(&t->saddr, 0,
2098 (struct sockaddr *)sa,
2099 t->encap_family);
2100 pfkey_sockaddr_fill(&t->id.daddr, 0,
2101 (struct sockaddr *) (sa + socklen),
2102 t->encap_family);
2103 }
2104 }
2105
2106 /* security context */
2107 if ((xfrm_ctx = xp->security)) {
2108 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2109
2110 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2111 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2112 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2113 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2114 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2115 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2116 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2117 xfrm_ctx->ctx_len);
2118 }
2119
2120 hdr->sadb_msg_len = size / sizeof(uint64_t);
2121 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2122
2123 return 0;
2124 }
2125
2126 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2127 {
2128 struct sk_buff *out_skb;
2129 struct sadb_msg *out_hdr;
2130 int err;
2131
2132 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2133 if (IS_ERR(out_skb)) {
2134 err = PTR_ERR(out_skb);
2135 goto out;
2136 }
2137 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2138 if (err < 0)
2139 return err;
2140
2141 out_hdr = (struct sadb_msg *) out_skb->data;
2142 out_hdr->sadb_msg_version = PF_KEY_V2;
2143
2144 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2145 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2146 else
2147 out_hdr->sadb_msg_type = event2poltype(c->event);
2148 out_hdr->sadb_msg_errno = 0;
2149 out_hdr->sadb_msg_seq = c->seq;
2150 out_hdr->sadb_msg_pid = c->pid;
2151 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2152 out:
2153 return 0;
2154
2155 }
2156
2157 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2158 {
2159 int err = 0;
2160 struct sadb_lifetime *lifetime;
2161 struct sadb_address *sa;
2162 struct sadb_x_policy *pol;
2163 struct xfrm_policy *xp;
2164 struct km_event c;
2165 struct sadb_x_sec_ctx *sec_ctx;
2166
2167 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2168 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2169 !ext_hdrs[SADB_X_EXT_POLICY-1])
2170 return -EINVAL;
2171
2172 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2173 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2174 return -EINVAL;
2175 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2176 return -EINVAL;
2177
2178 xp = xfrm_policy_alloc(GFP_KERNEL);
2179 if (xp == NULL)
2180 return -ENOBUFS;
2181
2182 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2183 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2184 xp->priority = pol->sadb_x_policy_priority;
2185
2186 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2187 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2188 if (!xp->family) {
2189 err = -EINVAL;
2190 goto out;
2191 }
2192 xp->selector.family = xp->family;
2193 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2194 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2195 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2196 if (xp->selector.sport)
2197 xp->selector.sport_mask = htons(0xffff);
2198
2199 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2200 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2201 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2202
2203 /* Amusing, we set this twice. KAME apps appear to set same value
2204 * in both addresses.
2205 */
2206 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2207
2208 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2209 if (xp->selector.dport)
2210 xp->selector.dport_mask = htons(0xffff);
2211
2212 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2213 if (sec_ctx != NULL) {
2214 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2215
2216 if (!uctx) {
2217 err = -ENOBUFS;
2218 goto out;
2219 }
2220
2221 err = security_xfrm_policy_alloc(&xp->security, uctx);
2222 kfree(uctx);
2223
2224 if (err)
2225 goto out;
2226 }
2227
2228 xp->lft.soft_byte_limit = XFRM_INF;
2229 xp->lft.hard_byte_limit = XFRM_INF;
2230 xp->lft.soft_packet_limit = XFRM_INF;
2231 xp->lft.hard_packet_limit = XFRM_INF;
2232 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2233 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2234 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2235 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2236 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2237 }
2238 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2239 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2240 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2241 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2242 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2243 }
2244 xp->xfrm_nr = 0;
2245 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2246 (err = parse_ipsecrequests(xp, pol)) < 0)
2247 goto out;
2248
2249 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2250 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2251
2252 xfrm_audit_policy_add(xp, err ? 0 : 1,
2253 audit_get_loginuid(current),
2254 audit_get_sessionid(current), 0);
2255
2256 if (err)
2257 goto out;
2258
2259 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2260 c.event = XFRM_MSG_UPDPOLICY;
2261 else
2262 c.event = XFRM_MSG_NEWPOLICY;
2263
2264 c.seq = hdr->sadb_msg_seq;
2265 c.pid = hdr->sadb_msg_pid;
2266
2267 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2268 xfrm_pol_put(xp);
2269 return 0;
2270
2271 out:
2272 xp->walk.dead = 1;
2273 xfrm_policy_destroy(xp);
2274 return err;
2275 }
2276
2277 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2278 {
2279 int err;
2280 struct sadb_address *sa;
2281 struct sadb_x_policy *pol;
2282 struct xfrm_policy *xp;
2283 struct xfrm_selector sel;
2284 struct km_event c;
2285 struct sadb_x_sec_ctx *sec_ctx;
2286 struct xfrm_sec_ctx *pol_ctx = NULL;
2287
2288 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2289 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2290 !ext_hdrs[SADB_X_EXT_POLICY-1])
2291 return -EINVAL;
2292
2293 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2294 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2295 return -EINVAL;
2296
2297 memset(&sel, 0, sizeof(sel));
2298
2299 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2300 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2301 sel.prefixlen_s = sa->sadb_address_prefixlen;
2302 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2303 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2304 if (sel.sport)
2305 sel.sport_mask = htons(0xffff);
2306
2307 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2308 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2309 sel.prefixlen_d = sa->sadb_address_prefixlen;
2310 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2311 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2312 if (sel.dport)
2313 sel.dport_mask = htons(0xffff);
2314
2315 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2316 if (sec_ctx != NULL) {
2317 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2318
2319 if (!uctx)
2320 return -ENOMEM;
2321
2322 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2323 kfree(uctx);
2324 if (err)
2325 return err;
2326 }
2327
2328 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN,
2329 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2330 1, &err);
2331 security_xfrm_policy_free(pol_ctx);
2332 if (xp == NULL)
2333 return -ENOENT;
2334
2335 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2336 audit_get_loginuid(current),
2337 audit_get_sessionid(current), 0);
2338
2339 if (err)
2340 goto out;
2341
2342 c.seq = hdr->sadb_msg_seq;
2343 c.pid = hdr->sadb_msg_pid;
2344 c.data.byid = 0;
2345 c.event = XFRM_MSG_DELPOLICY;
2346 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2347
2348 out:
2349 xfrm_pol_put(xp);
2350 return err;
2351 }
2352
2353 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2354 {
2355 int err;
2356 struct sk_buff *out_skb;
2357 struct sadb_msg *out_hdr;
2358 err = 0;
2359
2360 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2361 if (IS_ERR(out_skb)) {
2362 err = PTR_ERR(out_skb);
2363 goto out;
2364 }
2365 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2366 if (err < 0)
2367 goto out;
2368
2369 out_hdr = (struct sadb_msg *) out_skb->data;
2370 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2371 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2372 out_hdr->sadb_msg_satype = 0;
2373 out_hdr->sadb_msg_errno = 0;
2374 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2375 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2376 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
2377 err = 0;
2378
2379 out:
2380 return err;
2381 }
2382
2383 #ifdef CONFIG_NET_KEY_MIGRATE
2384 static int pfkey_sockaddr_pair_size(sa_family_t family)
2385 {
2386 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2387 }
2388
2389 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2390 xfrm_address_t *saddr, xfrm_address_t *daddr,
2391 u16 *family)
2392 {
2393 int af, socklen;
2394
2395 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2396 return -EINVAL;
2397
2398 af = pfkey_sockaddr_extract(sa, saddr);
2399 if (!af)
2400 return -EINVAL;
2401
2402 socklen = pfkey_sockaddr_len(af);
2403 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2404 daddr) != af)
2405 return -EINVAL;
2406
2407 *family = af;
2408 return 0;
2409 }
2410
2411 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2412 struct xfrm_migrate *m)
2413 {
2414 int err;
2415 struct sadb_x_ipsecrequest *rq2;
2416 int mode;
2417
2418 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2419 len < rq1->sadb_x_ipsecrequest_len)
2420 return -EINVAL;
2421
2422 /* old endoints */
2423 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2424 rq1->sadb_x_ipsecrequest_len,
2425 &m->old_saddr, &m->old_daddr,
2426 &m->old_family);
2427 if (err)
2428 return err;
2429
2430 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2431 len -= rq1->sadb_x_ipsecrequest_len;
2432
2433 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2434 len < rq2->sadb_x_ipsecrequest_len)
2435 return -EINVAL;
2436
2437 /* new endpoints */
2438 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2439 rq2->sadb_x_ipsecrequest_len,
2440 &m->new_saddr, &m->new_daddr,
2441 &m->new_family);
2442 if (err)
2443 return err;
2444
2445 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2446 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2447 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2448 return -EINVAL;
2449
2450 m->proto = rq1->sadb_x_ipsecrequest_proto;
2451 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2452 return -EINVAL;
2453 m->mode = mode;
2454 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2455
2456 return ((int)(rq1->sadb_x_ipsecrequest_len +
2457 rq2->sadb_x_ipsecrequest_len));
2458 }
2459
2460 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2461 struct sadb_msg *hdr, void **ext_hdrs)
2462 {
2463 int i, len, ret, err = -EINVAL;
2464 u8 dir;
2465 struct sadb_address *sa;
2466 struct sadb_x_kmaddress *kma;
2467 struct sadb_x_policy *pol;
2468 struct sadb_x_ipsecrequest *rq;
2469 struct xfrm_selector sel;
2470 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2471 struct xfrm_kmaddress k;
2472
2473 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2474 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2475 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2476 err = -EINVAL;
2477 goto out;
2478 }
2479
2480 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2481 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2482
2483 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2484 err = -EINVAL;
2485 goto out;
2486 }
2487
2488 if (kma) {
2489 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2490 k.reserved = kma->sadb_x_kmaddress_reserved;
2491 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2492 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2493 &k.local, &k.remote, &k.family);
2494 if (ret < 0) {
2495 err = ret;
2496 goto out;
2497 }
2498 }
2499
2500 dir = pol->sadb_x_policy_dir - 1;
2501 memset(&sel, 0, sizeof(sel));
2502
2503 /* set source address info of selector */
2504 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2505 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2506 sel.prefixlen_s = sa->sadb_address_prefixlen;
2507 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2508 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2509 if (sel.sport)
2510 sel.sport_mask = htons(0xffff);
2511
2512 /* set destination address info of selector */
2513 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2514 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2515 sel.prefixlen_d = sa->sadb_address_prefixlen;
2516 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2517 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2518 if (sel.dport)
2519 sel.dport_mask = htons(0xffff);
2520
2521 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2522
2523 /* extract ipsecrequests */
2524 i = 0;
2525 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2526
2527 while (len > 0 && i < XFRM_MAX_DEPTH) {
2528 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2529 if (ret < 0) {
2530 err = ret;
2531 goto out;
2532 } else {
2533 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2534 len -= ret;
2535 i++;
2536 }
2537 }
2538
2539 if (!i || len > 0) {
2540 err = -EINVAL;
2541 goto out;
2542 }
2543
2544 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2545 kma ? &k : NULL);
2546
2547 out:
2548 return err;
2549 }
2550 #else
2551 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2552 struct sadb_msg *hdr, void **ext_hdrs)
2553 {
2554 return -ENOPROTOOPT;
2555 }
2556 #endif
2557
2558
2559 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2560 {
2561 unsigned int dir;
2562 int err = 0, delete;
2563 struct sadb_x_policy *pol;
2564 struct xfrm_policy *xp;
2565 struct km_event c;
2566
2567 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2568 return -EINVAL;
2569
2570 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2571 if (dir >= XFRM_POLICY_MAX)
2572 return -EINVAL;
2573
2574 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2575 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
2576 delete, &err);
2577 if (xp == NULL)
2578 return -ENOENT;
2579
2580 if (delete) {
2581 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2582 audit_get_loginuid(current),
2583 audit_get_sessionid(current), 0);
2584
2585 if (err)
2586 goto out;
2587 c.seq = hdr->sadb_msg_seq;
2588 c.pid = hdr->sadb_msg_pid;
2589 c.data.byid = 1;
2590 c.event = XFRM_MSG_DELPOLICY;
2591 km_policy_notify(xp, dir, &c);
2592 } else {
2593 err = key_pol_get_resp(sk, xp, hdr, dir);
2594 }
2595
2596 out:
2597 xfrm_pol_put(xp);
2598 return err;
2599 }
2600
2601 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2602 {
2603 struct pfkey_sock *pfk = ptr;
2604 struct sk_buff *out_skb;
2605 struct sadb_msg *out_hdr;
2606 int err;
2607
2608 if (!pfkey_can_dump(&pfk->sk))
2609 return -ENOBUFS;
2610
2611 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2612 if (IS_ERR(out_skb))
2613 return PTR_ERR(out_skb);
2614
2615 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2616 if (err < 0)
2617 return err;
2618
2619 out_hdr = (struct sadb_msg *) out_skb->data;
2620 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2621 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2622 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2623 out_hdr->sadb_msg_errno = 0;
2624 out_hdr->sadb_msg_seq = count + 1;
2625 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
2626
2627 if (pfk->dump.skb)
2628 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2629 &pfk->sk);
2630 pfk->dump.skb = out_skb;
2631
2632 return 0;
2633 }
2634
2635 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2636 {
2637 return xfrm_policy_walk(&pfk->dump.u.policy, dump_sp, (void *) pfk);
2638 }
2639
2640 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2641 {
2642 xfrm_policy_walk_done(&pfk->dump.u.policy);
2643 }
2644
2645 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2646 {
2647 struct pfkey_sock *pfk = pfkey_sk(sk);
2648
2649 if (pfk->dump.dump != NULL)
2650 return -EBUSY;
2651
2652 pfk->dump.msg_version = hdr->sadb_msg_version;
2653 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2654 pfk->dump.dump = pfkey_dump_sp;
2655 pfk->dump.done = pfkey_dump_sp_done;
2656 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2657
2658 return pfkey_do_dump(pfk);
2659 }
2660
2661 static int key_notify_policy_flush(struct km_event *c)
2662 {
2663 struct sk_buff *skb_out;
2664 struct sadb_msg *hdr;
2665
2666 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2667 if (!skb_out)
2668 return -ENOBUFS;
2669 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2670 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2671 hdr->sadb_msg_seq = c->seq;
2672 hdr->sadb_msg_pid = c->pid;
2673 hdr->sadb_msg_version = PF_KEY_V2;
2674 hdr->sadb_msg_errno = (uint8_t) 0;
2675 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2676 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2677 return 0;
2678
2679 }
2680
2681 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2682 {
2683 struct km_event c;
2684 struct xfrm_audit audit_info;
2685 int err;
2686
2687 audit_info.loginuid = audit_get_loginuid(current);
2688 audit_info.sessionid = audit_get_sessionid(current);
2689 audit_info.secid = 0;
2690 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2691 if (err)
2692 return err;
2693 c.data.type = XFRM_POLICY_TYPE_MAIN;
2694 c.event = XFRM_MSG_FLUSHPOLICY;
2695 c.pid = hdr->sadb_msg_pid;
2696 c.seq = hdr->sadb_msg_seq;
2697 km_policy_notify(NULL, 0, &c);
2698
2699 return 0;
2700 }
2701
2702 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2703 struct sadb_msg *hdr, void **ext_hdrs);
2704 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2705 [SADB_RESERVED] = pfkey_reserved,
2706 [SADB_GETSPI] = pfkey_getspi,
2707 [SADB_UPDATE] = pfkey_add,
2708 [SADB_ADD] = pfkey_add,
2709 [SADB_DELETE] = pfkey_delete,
2710 [SADB_GET] = pfkey_get,
2711 [SADB_ACQUIRE] = pfkey_acquire,
2712 [SADB_REGISTER] = pfkey_register,
2713 [SADB_EXPIRE] = NULL,
2714 [SADB_FLUSH] = pfkey_flush,
2715 [SADB_DUMP] = pfkey_dump,
2716 [SADB_X_PROMISC] = pfkey_promisc,
2717 [SADB_X_PCHANGE] = NULL,
2718 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2719 [SADB_X_SPDADD] = pfkey_spdadd,
2720 [SADB_X_SPDDELETE] = pfkey_spddelete,
2721 [SADB_X_SPDGET] = pfkey_spdget,
2722 [SADB_X_SPDACQUIRE] = NULL,
2723 [SADB_X_SPDDUMP] = pfkey_spddump,
2724 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2725 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2726 [SADB_X_SPDDELETE2] = pfkey_spdget,
2727 [SADB_X_MIGRATE] = pfkey_migrate,
2728 };
2729
2730 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2731 {
2732 void *ext_hdrs[SADB_EXT_MAX];
2733 int err;
2734
2735 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2736 BROADCAST_PROMISC_ONLY, NULL);
2737
2738 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2739 err = parse_exthdrs(skb, hdr, ext_hdrs);
2740 if (!err) {
2741 err = -EOPNOTSUPP;
2742 if (pfkey_funcs[hdr->sadb_msg_type])
2743 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2744 }
2745 return err;
2746 }
2747
2748 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2749 {
2750 struct sadb_msg *hdr = NULL;
2751
2752 if (skb->len < sizeof(*hdr)) {
2753 *errp = -EMSGSIZE;
2754 } else {
2755 hdr = (struct sadb_msg *) skb->data;
2756 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2757 hdr->sadb_msg_reserved != 0 ||
2758 (hdr->sadb_msg_type <= SADB_RESERVED ||
2759 hdr->sadb_msg_type > SADB_MAX)) {
2760 hdr = NULL;
2761 *errp = -EINVAL;
2762 } else if (hdr->sadb_msg_len != (skb->len /
2763 sizeof(uint64_t)) ||
2764 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2765 sizeof(uint64_t))) {
2766 hdr = NULL;
2767 *errp = -EMSGSIZE;
2768 } else {
2769 *errp = 0;
2770 }
2771 }
2772 return hdr;
2773 }
2774
2775 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2776 {
2777 unsigned int id = d->desc.sadb_alg_id;
2778
2779 if (id >= sizeof(t->aalgos) * 8)
2780 return 0;
2781
2782 return (t->aalgos >> id) & 1;
2783 }
2784
2785 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2786 {
2787 unsigned int id = d->desc.sadb_alg_id;
2788
2789 if (id >= sizeof(t->ealgos) * 8)
2790 return 0;
2791
2792 return (t->ealgos >> id) & 1;
2793 }
2794
2795 static int count_ah_combs(struct xfrm_tmpl *t)
2796 {
2797 int i, sz = 0;
2798
2799 for (i = 0; ; i++) {
2800 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2801 if (!aalg)
2802 break;
2803 if (aalg_tmpl_set(t, aalg) && aalg->available)
2804 sz += sizeof(struct sadb_comb);
2805 }
2806 return sz + sizeof(struct sadb_prop);
2807 }
2808
2809 static int count_esp_combs(struct xfrm_tmpl *t)
2810 {
2811 int i, k, sz = 0;
2812
2813 for (i = 0; ; i++) {
2814 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2815 if (!ealg)
2816 break;
2817
2818 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2819 continue;
2820
2821 for (k = 1; ; k++) {
2822 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2823 if (!aalg)
2824 break;
2825
2826 if (aalg_tmpl_set(t, aalg) && aalg->available)
2827 sz += sizeof(struct sadb_comb);
2828 }
2829 }
2830 return sz + sizeof(struct sadb_prop);
2831 }
2832
2833 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2834 {
2835 struct sadb_prop *p;
2836 int i;
2837
2838 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2839 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2840 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2841 p->sadb_prop_replay = 32;
2842 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2843
2844 for (i = 0; ; i++) {
2845 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2846 if (!aalg)
2847 break;
2848
2849 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2850 struct sadb_comb *c;
2851 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2852 memset(c, 0, sizeof(*c));
2853 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2854 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2855 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2856 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2857 c->sadb_comb_hard_addtime = 24*60*60;
2858 c->sadb_comb_soft_addtime = 20*60*60;
2859 c->sadb_comb_hard_usetime = 8*60*60;
2860 c->sadb_comb_soft_usetime = 7*60*60;
2861 }
2862 }
2863 }
2864
2865 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2866 {
2867 struct sadb_prop *p;
2868 int i, k;
2869
2870 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2871 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2872 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2873 p->sadb_prop_replay = 32;
2874 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2875
2876 for (i=0; ; i++) {
2877 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2878 if (!ealg)
2879 break;
2880
2881 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2882 continue;
2883
2884 for (k = 1; ; k++) {
2885 struct sadb_comb *c;
2886 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2887 if (!aalg)
2888 break;
2889 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2890 continue;
2891 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2892 memset(c, 0, sizeof(*c));
2893 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2894 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2895 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2896 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2897 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2898 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2899 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2900 c->sadb_comb_hard_addtime = 24*60*60;
2901 c->sadb_comb_soft_addtime = 20*60*60;
2902 c->sadb_comb_hard_usetime = 8*60*60;
2903 c->sadb_comb_soft_usetime = 7*60*60;
2904 }
2905 }
2906 }
2907
2908 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2909 {
2910 return 0;
2911 }
2912
2913 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2914 {
2915 struct sk_buff *out_skb;
2916 struct sadb_msg *out_hdr;
2917 int hard;
2918 int hsc;
2919
2920 hard = c->data.hard;
2921 if (hard)
2922 hsc = 2;
2923 else
2924 hsc = 1;
2925
2926 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2927 if (IS_ERR(out_skb))
2928 return PTR_ERR(out_skb);
2929
2930 out_hdr = (struct sadb_msg *) out_skb->data;
2931 out_hdr->sadb_msg_version = PF_KEY_V2;
2932 out_hdr->sadb_msg_type = SADB_EXPIRE;
2933 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2934 out_hdr->sadb_msg_errno = 0;
2935 out_hdr->sadb_msg_reserved = 0;
2936 out_hdr->sadb_msg_seq = 0;
2937 out_hdr->sadb_msg_pid = 0;
2938
2939 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2940 return 0;
2941 }
2942
2943 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2944 {
2945 if (atomic_read(&pfkey_socks_nr) == 0)
2946 return 0;
2947
2948 switch (c->event) {
2949 case XFRM_MSG_EXPIRE:
2950 return key_notify_sa_expire(x, c);
2951 case XFRM_MSG_DELSA:
2952 case XFRM_MSG_NEWSA:
2953 case XFRM_MSG_UPDSA:
2954 return key_notify_sa(x, c);
2955 case XFRM_MSG_FLUSHSA:
2956 return key_notify_sa_flush(c);
2957 case XFRM_MSG_NEWAE: /* not yet supported */
2958 break;
2959 default:
2960 printk("pfkey: Unknown SA event %d\n", c->event);
2961 break;
2962 }
2963
2964 return 0;
2965 }
2966
2967 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2968 {
2969 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2970 return 0;
2971
2972 switch (c->event) {
2973 case XFRM_MSG_POLEXPIRE:
2974 return key_notify_policy_expire(xp, c);
2975 case XFRM_MSG_DELPOLICY:
2976 case XFRM_MSG_NEWPOLICY:
2977 case XFRM_MSG_UPDPOLICY:
2978 return key_notify_policy(xp, dir, c);
2979 case XFRM_MSG_FLUSHPOLICY:
2980 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2981 break;
2982 return key_notify_policy_flush(c);
2983 default:
2984 printk("pfkey: Unknown policy event %d\n", c->event);
2985 break;
2986 }
2987
2988 return 0;
2989 }
2990
2991 static u32 get_acqseq(void)
2992 {
2993 u32 res;
2994 static u32 acqseq;
2995 static DEFINE_SPINLOCK(acqseq_lock);
2996
2997 spin_lock_bh(&acqseq_lock);
2998 res = (++acqseq ? : ++acqseq);
2999 spin_unlock_bh(&acqseq_lock);
3000 return res;
3001 }
3002
3003 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3004 {
3005 struct sk_buff *skb;
3006 struct sadb_msg *hdr;
3007 struct sadb_address *addr;
3008 struct sadb_x_policy *pol;
3009 int sockaddr_size;
3010 int size;
3011 struct sadb_x_sec_ctx *sec_ctx;
3012 struct xfrm_sec_ctx *xfrm_ctx;
3013 int ctx_size = 0;
3014
3015 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3016 if (!sockaddr_size)
3017 return -EINVAL;
3018
3019 size = sizeof(struct sadb_msg) +
3020 (sizeof(struct sadb_address) * 2) +
3021 (sockaddr_size * 2) +
3022 sizeof(struct sadb_x_policy);
3023
3024 if (x->id.proto == IPPROTO_AH)
3025 size += count_ah_combs(t);
3026 else if (x->id.proto == IPPROTO_ESP)
3027 size += count_esp_combs(t);
3028
3029 if ((xfrm_ctx = x->security)) {
3030 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3031 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3032 }
3033
3034 skb = alloc_skb(size + 16, GFP_ATOMIC);
3035 if (skb == NULL)
3036 return -ENOMEM;
3037
3038 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3039 hdr->sadb_msg_version = PF_KEY_V2;
3040 hdr->sadb_msg_type = SADB_ACQUIRE;
3041 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3042 hdr->sadb_msg_len = size / sizeof(uint64_t);
3043 hdr->sadb_msg_errno = 0;
3044 hdr->sadb_msg_reserved = 0;
3045 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3046 hdr->sadb_msg_pid = 0;
3047
3048 /* src address */
3049 addr = (struct sadb_address*) skb_put(skb,
3050 sizeof(struct sadb_address)+sockaddr_size);
3051 addr->sadb_address_len =
3052 (sizeof(struct sadb_address)+sockaddr_size)/
3053 sizeof(uint64_t);
3054 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3055 addr->sadb_address_proto = 0;
3056 addr->sadb_address_reserved = 0;
3057 addr->sadb_address_prefixlen =
3058 pfkey_sockaddr_fill(&x->props.saddr, 0,
3059 (struct sockaddr *) (addr + 1),
3060 x->props.family);
3061 if (!addr->sadb_address_prefixlen)
3062 BUG();
3063
3064 /* dst address */
3065 addr = (struct sadb_address*) skb_put(skb,
3066 sizeof(struct sadb_address)+sockaddr_size);
3067 addr->sadb_address_len =
3068 (sizeof(struct sadb_address)+sockaddr_size)/
3069 sizeof(uint64_t);
3070 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3071 addr->sadb_address_proto = 0;
3072 addr->sadb_address_reserved = 0;
3073 addr->sadb_address_prefixlen =
3074 pfkey_sockaddr_fill(&x->id.daddr, 0,
3075 (struct sockaddr *) (addr + 1),
3076 x->props.family);
3077 if (!addr->sadb_address_prefixlen)
3078 BUG();
3079
3080 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3081 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3082 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3083 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3084 pol->sadb_x_policy_dir = dir+1;
3085 pol->sadb_x_policy_id = xp->index;
3086
3087 /* Set sadb_comb's. */
3088 if (x->id.proto == IPPROTO_AH)
3089 dump_ah_combs(skb, t);
3090 else if (x->id.proto == IPPROTO_ESP)
3091 dump_esp_combs(skb, t);
3092
3093 /* security context */
3094 if (xfrm_ctx) {
3095 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3096 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3097 sec_ctx->sadb_x_sec_len =
3098 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3099 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3100 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3101 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3102 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3103 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3104 xfrm_ctx->ctx_len);
3105 }
3106
3107 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3108 }
3109
3110 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3111 u8 *data, int len, int *dir)
3112 {
3113 struct xfrm_policy *xp;
3114 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3115 struct sadb_x_sec_ctx *sec_ctx;
3116
3117 switch (sk->sk_family) {
3118 case AF_INET:
3119 if (opt != IP_IPSEC_POLICY) {
3120 *dir = -EOPNOTSUPP;
3121 return NULL;
3122 }
3123 break;
3124 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3125 case AF_INET6:
3126 if (opt != IPV6_IPSEC_POLICY) {
3127 *dir = -EOPNOTSUPP;
3128 return NULL;
3129 }
3130 break;
3131 #endif
3132 default:
3133 *dir = -EINVAL;
3134 return NULL;
3135 }
3136
3137 *dir = -EINVAL;
3138
3139 if (len < sizeof(struct sadb_x_policy) ||
3140 pol->sadb_x_policy_len*8 > len ||
3141 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3142 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3143 return NULL;
3144
3145 xp = xfrm_policy_alloc(GFP_ATOMIC);
3146 if (xp == NULL) {
3147 *dir = -ENOBUFS;
3148 return NULL;
3149 }
3150
3151 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3152 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3153
3154 xp->lft.soft_byte_limit = XFRM_INF;
3155 xp->lft.hard_byte_limit = XFRM_INF;
3156 xp->lft.soft_packet_limit = XFRM_INF;
3157 xp->lft.hard_packet_limit = XFRM_INF;
3158 xp->family = sk->sk_family;
3159
3160 xp->xfrm_nr = 0;
3161 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3162 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3163 goto out;
3164
3165 /* security context too */
3166 if (len >= (pol->sadb_x_policy_len*8 +
3167 sizeof(struct sadb_x_sec_ctx))) {
3168 char *p = (char *)pol;
3169 struct xfrm_user_sec_ctx *uctx;
3170
3171 p += pol->sadb_x_policy_len*8;
3172 sec_ctx = (struct sadb_x_sec_ctx *)p;
3173 if (len < pol->sadb_x_policy_len*8 +
3174 sec_ctx->sadb_x_sec_len) {
3175 *dir = -EINVAL;
3176 goto out;
3177 }
3178 if ((*dir = verify_sec_ctx_len(p)))
3179 goto out;
3180 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3181 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
3182 kfree(uctx);
3183
3184 if (*dir)
3185 goto out;
3186 }
3187
3188 *dir = pol->sadb_x_policy_dir-1;
3189 return xp;
3190
3191 out:
3192 xfrm_policy_destroy(xp);
3193 return NULL;
3194 }
3195
3196 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3197 {
3198 struct sk_buff *skb;
3199 struct sadb_msg *hdr;
3200 struct sadb_sa *sa;
3201 struct sadb_address *addr;
3202 struct sadb_x_nat_t_port *n_port;
3203 int sockaddr_size;
3204 int size;
3205 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3206 struct xfrm_encap_tmpl *natt = NULL;
3207
3208 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3209 if (!sockaddr_size)
3210 return -EINVAL;
3211
3212 if (!satype)
3213 return -EINVAL;
3214
3215 if (!x->encap)
3216 return -EINVAL;
3217
3218 natt = x->encap;
3219
3220 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3221 *
3222 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3223 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3224 */
3225
3226 size = sizeof(struct sadb_msg) +
3227 sizeof(struct sadb_sa) +
3228 (sizeof(struct sadb_address) * 2) +
3229 (sockaddr_size * 2) +
3230 (sizeof(struct sadb_x_nat_t_port) * 2);
3231
3232 skb = alloc_skb(size + 16, GFP_ATOMIC);
3233 if (skb == NULL)
3234 return -ENOMEM;
3235
3236 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3237 hdr->sadb_msg_version = PF_KEY_V2;
3238 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3239 hdr->sadb_msg_satype = satype;
3240 hdr->sadb_msg_len = size / sizeof(uint64_t);
3241 hdr->sadb_msg_errno = 0;
3242 hdr->sadb_msg_reserved = 0;
3243 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3244 hdr->sadb_msg_pid = 0;
3245
3246 /* SA */
3247 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3248 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3249 sa->sadb_sa_exttype = SADB_EXT_SA;
3250 sa->sadb_sa_spi = x->id.spi;
3251 sa->sadb_sa_replay = 0;
3252 sa->sadb_sa_state = 0;
3253 sa->sadb_sa_auth = 0;
3254 sa->sadb_sa_encrypt = 0;
3255 sa->sadb_sa_flags = 0;
3256
3257 /* ADDRESS_SRC (old addr) */
3258 addr = (struct sadb_address*)
3259 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3260 addr->sadb_address_len =
3261 (sizeof(struct sadb_address)+sockaddr_size)/
3262 sizeof(uint64_t);
3263 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3264 addr->sadb_address_proto = 0;
3265 addr->sadb_address_reserved = 0;
3266 addr->sadb_address_prefixlen =
3267 pfkey_sockaddr_fill(&x->props.saddr, 0,
3268 (struct sockaddr *) (addr + 1),
3269 x->props.family);
3270 if (!addr->sadb_address_prefixlen)
3271 BUG();
3272
3273 /* NAT_T_SPORT (old port) */
3274 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3275 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3276 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3277 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3278 n_port->sadb_x_nat_t_port_reserved = 0;
3279
3280 /* ADDRESS_DST (new addr) */
3281 addr = (struct sadb_address*)
3282 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3283 addr->sadb_address_len =
3284 (sizeof(struct sadb_address)+sockaddr_size)/
3285 sizeof(uint64_t);
3286 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3287 addr->sadb_address_proto = 0;
3288 addr->sadb_address_reserved = 0;
3289 addr->sadb_address_prefixlen =
3290 pfkey_sockaddr_fill(ipaddr, 0,
3291 (struct sockaddr *) (addr + 1),
3292 x->props.family);
3293 if (!addr->sadb_address_prefixlen)
3294 BUG();
3295
3296 /* NAT_T_DPORT (new port) */
3297 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3298 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3299 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3300 n_port->sadb_x_nat_t_port_port = sport;
3301 n_port->sadb_x_nat_t_port_reserved = 0;
3302
3303 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3304 }
3305
3306 #ifdef CONFIG_NET_KEY_MIGRATE
3307 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3308 struct xfrm_selector *sel)
3309 {
3310 struct sadb_address *addr;
3311 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3312 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3313 addr->sadb_address_exttype = type;
3314 addr->sadb_address_proto = sel->proto;
3315 addr->sadb_address_reserved = 0;
3316
3317 switch (type) {
3318 case SADB_EXT_ADDRESS_SRC:
3319 addr->sadb_address_prefixlen = sel->prefixlen_s;
3320 pfkey_sockaddr_fill(&sel->saddr, 0,
3321 (struct sockaddr *)(addr + 1),
3322 sel->family);
3323 break;
3324 case SADB_EXT_ADDRESS_DST:
3325 addr->sadb_address_prefixlen = sel->prefixlen_d;
3326 pfkey_sockaddr_fill(&sel->daddr, 0,
3327 (struct sockaddr *)(addr + 1),
3328 sel->family);
3329 break;
3330 default:
3331 return -EINVAL;
3332 }
3333
3334 return 0;
3335 }
3336
3337
3338 static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k)
3339 {
3340 struct sadb_x_kmaddress *kma;
3341 u8 *sa;
3342 int family = k->family;
3343 int socklen = pfkey_sockaddr_len(family);
3344 int size_req;
3345
3346 size_req = (sizeof(struct sadb_x_kmaddress) +
3347 pfkey_sockaddr_pair_size(family));
3348
3349 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3350 memset(kma, 0, size_req);
3351 kma->sadb_x_kmaddress_len = size_req / 8;
3352 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3353 kma->sadb_x_kmaddress_reserved = k->reserved;
3354
3355 sa = (u8 *)(kma + 1);
3356 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3357 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3358 return -EINVAL;
3359
3360 return 0;
3361 }
3362
3363 static int set_ipsecrequest(struct sk_buff *skb,
3364 uint8_t proto, uint8_t mode, int level,
3365 uint32_t reqid, uint8_t family,
3366 xfrm_address_t *src, xfrm_address_t *dst)
3367 {
3368 struct sadb_x_ipsecrequest *rq;
3369 u8 *sa;
3370 int socklen = pfkey_sockaddr_len(family);
3371 int size_req;
3372
3373 size_req = sizeof(struct sadb_x_ipsecrequest) +
3374 pfkey_sockaddr_pair_size(family);
3375
3376 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3377 memset(rq, 0, size_req);
3378 rq->sadb_x_ipsecrequest_len = size_req;
3379 rq->sadb_x_ipsecrequest_proto = proto;
3380 rq->sadb_x_ipsecrequest_mode = mode;
3381 rq->sadb_x_ipsecrequest_level = level;
3382 rq->sadb_x_ipsecrequest_reqid = reqid;
3383
3384 sa = (u8 *) (rq + 1);
3385 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3386 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3387 return -EINVAL;
3388
3389 return 0;
3390 }
3391 #endif
3392
3393 #ifdef CONFIG_NET_KEY_MIGRATE
3394 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3395 struct xfrm_migrate *m, int num_bundles,
3396 struct xfrm_kmaddress *k)
3397 {
3398 int i;
3399 int sasize_sel;
3400 int size = 0;
3401 int size_pol = 0;
3402 struct sk_buff *skb;
3403 struct sadb_msg *hdr;
3404 struct sadb_x_policy *pol;
3405 struct xfrm_migrate *mp;
3406
3407 if (type != XFRM_POLICY_TYPE_MAIN)
3408 return 0;
3409
3410 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3411 return -EINVAL;
3412
3413 if (k != NULL) {
3414 /* addresses for KM */
3415 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3416 pfkey_sockaddr_pair_size(k->family));
3417 }
3418
3419 /* selector */
3420 sasize_sel = pfkey_sockaddr_size(sel->family);
3421 if (!sasize_sel)
3422 return -EINVAL;
3423 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3424
3425 /* policy info */
3426 size_pol += sizeof(struct sadb_x_policy);
3427
3428 /* ipsecrequests */
3429 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3430 /* old locator pair */
3431 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3432 pfkey_sockaddr_pair_size(mp->old_family);
3433 /* new locator pair */
3434 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3435 pfkey_sockaddr_pair_size(mp->new_family);
3436 }
3437
3438 size += sizeof(struct sadb_msg) + size_pol;
3439
3440 /* alloc buffer */
3441 skb = alloc_skb(size, GFP_ATOMIC);
3442 if (skb == NULL)
3443 return -ENOMEM;
3444
3445 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3446 hdr->sadb_msg_version = PF_KEY_V2;
3447 hdr->sadb_msg_type = SADB_X_MIGRATE;
3448 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3449 hdr->sadb_msg_len = size / 8;
3450 hdr->sadb_msg_errno = 0;
3451 hdr->sadb_msg_reserved = 0;
3452 hdr->sadb_msg_seq = 0;
3453 hdr->sadb_msg_pid = 0;
3454
3455 /* Addresses to be used by KM for negotiation, if ext is available */
3456 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3457 return -EINVAL;
3458
3459 /* selector src */
3460 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3461
3462 /* selector dst */
3463 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3464
3465 /* policy information */
3466 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3467 pol->sadb_x_policy_len = size_pol / 8;
3468 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3469 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3470 pol->sadb_x_policy_dir = dir + 1;
3471 pol->sadb_x_policy_id = 0;
3472 pol->sadb_x_policy_priority = 0;
3473
3474 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3475 /* old ipsecrequest */
3476 int mode = pfkey_mode_from_xfrm(mp->mode);
3477 if (mode < 0)
3478 goto err;
3479 if (set_ipsecrequest(skb, mp->proto, mode,
3480 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3481 mp->reqid, mp->old_family,
3482 &mp->old_saddr, &mp->old_daddr) < 0)
3483 goto err;
3484
3485 /* new ipsecrequest */
3486 if (set_ipsecrequest(skb, mp->proto, mode,
3487 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3488 mp->reqid, mp->new_family,
3489 &mp->new_saddr, &mp->new_daddr) < 0)
3490 goto err;
3491 }
3492
3493 /* broadcast migrate message to sockets */
3494 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3495
3496 return 0;
3497
3498 err:
3499 kfree_skb(skb);
3500 return -EINVAL;
3501 }
3502 #else
3503 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3504 struct xfrm_migrate *m, int num_bundles,
3505 struct xfrm_kmaddress *k)
3506 {
3507 return -ENOPROTOOPT;
3508 }
3509 #endif
3510
3511 static int pfkey_sendmsg(struct kiocb *kiocb,
3512 struct socket *sock, struct msghdr *msg, size_t len)
3513 {
3514 struct sock *sk = sock->sk;
3515 struct sk_buff *skb = NULL;
3516 struct sadb_msg *hdr = NULL;
3517 int err;
3518
3519 err = -EOPNOTSUPP;
3520 if (msg->msg_flags & MSG_OOB)
3521 goto out;
3522
3523 err = -EMSGSIZE;
3524 if ((unsigned)len > sk->sk_sndbuf - 32)
3525 goto out;
3526
3527 err = -ENOBUFS;
3528 skb = alloc_skb(len, GFP_KERNEL);
3529 if (skb == NULL)
3530 goto out;
3531
3532 err = -EFAULT;
3533 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3534 goto out;
3535
3536 hdr = pfkey_get_base_msg(skb, &err);
3537 if (!hdr)
3538 goto out;
3539
3540 mutex_lock(&xfrm_cfg_mutex);
3541 err = pfkey_process(sk, skb, hdr);
3542 mutex_unlock(&xfrm_cfg_mutex);
3543
3544 out:
3545 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3546 err = 0;
3547 if (skb)
3548 kfree_skb(skb);
3549
3550 return err ? : len;
3551 }
3552
3553 static int pfkey_recvmsg(struct kiocb *kiocb,
3554 struct socket *sock, struct msghdr *msg, size_t len,
3555 int flags)
3556 {
3557 struct sock *sk = sock->sk;
3558 struct pfkey_sock *pfk = pfkey_sk(sk);
3559 struct sk_buff *skb;
3560 int copied, err;
3561
3562 err = -EINVAL;
3563 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3564 goto out;
3565
3566 msg->msg_namelen = 0;
3567 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3568 if (skb == NULL)
3569 goto out;
3570
3571 copied = skb->len;
3572 if (copied > len) {
3573 msg->msg_flags |= MSG_TRUNC;
3574 copied = len;
3575 }
3576
3577 skb_reset_transport_header(skb);
3578 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3579 if (err)
3580 goto out_free;
3581
3582 sock_recv_timestamp(msg, sk, skb);
3583
3584 err = (flags & MSG_TRUNC) ? skb->len : copied;
3585
3586 if (pfk->dump.dump != NULL &&
3587 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3588 pfkey_do_dump(pfk);
3589
3590 out_free:
3591 skb_free_datagram(sk, skb);
3592 out:
3593 return err;
3594 }
3595
3596 static const struct proto_ops pfkey_ops = {
3597 .family = PF_KEY,
3598 .owner = THIS_MODULE,
3599 /* Operations that make no sense on pfkey sockets. */
3600 .bind = sock_no_bind,
3601 .connect = sock_no_connect,
3602 .socketpair = sock_no_socketpair,
3603 .accept = sock_no_accept,
3604 .getname = sock_no_getname,
3605 .ioctl = sock_no_ioctl,
3606 .listen = sock_no_listen,
3607 .shutdown = sock_no_shutdown,
3608 .setsockopt = sock_no_setsockopt,
3609 .getsockopt = sock_no_getsockopt,
3610 .mmap = sock_no_mmap,
3611 .sendpage = sock_no_sendpage,
3612
3613 /* Now the operations that really occur. */
3614 .release = pfkey_release,
3615 .poll = datagram_poll,
3616 .sendmsg = pfkey_sendmsg,
3617 .recvmsg = pfkey_recvmsg,
3618 };
3619
3620 static struct net_proto_family pfkey_family_ops = {
3621 .family = PF_KEY,
3622 .create = pfkey_create,
3623 .owner = THIS_MODULE,
3624 };
3625
3626 #ifdef CONFIG_PROC_FS
3627 static int pfkey_seq_show(struct seq_file *f, void *v)
3628 {
3629 struct sock *s;
3630
3631 s = (struct sock *)v;
3632 if (v == SEQ_START_TOKEN)
3633 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3634 else
3635 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
3636 s,
3637 atomic_read(&s->sk_refcnt),
3638 atomic_read(&s->sk_rmem_alloc),
3639 atomic_read(&s->sk_wmem_alloc),
3640 sock_i_uid(s),
3641 sock_i_ino(s)
3642 );
3643 return 0;
3644 }
3645
3646 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3647 {
3648 struct sock *s;
3649 struct hlist_node *node;
3650 loff_t pos = *ppos;
3651
3652 read_lock(&pfkey_table_lock);
3653 if (pos == 0)
3654 return SEQ_START_TOKEN;
3655
3656 sk_for_each(s, node, &pfkey_table)
3657 if (pos-- == 1)
3658 return s;
3659
3660 return NULL;
3661 }
3662
3663 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3664 {
3665 ++*ppos;
3666 return (v == SEQ_START_TOKEN) ?
3667 sk_head(&pfkey_table) :
3668 sk_next((struct sock *)v);
3669 }
3670
3671 static void pfkey_seq_stop(struct seq_file *f, void *v)
3672 {
3673 read_unlock(&pfkey_table_lock);
3674 }
3675
3676 static struct seq_operations pfkey_seq_ops = {
3677 .start = pfkey_seq_start,
3678 .next = pfkey_seq_next,
3679 .stop = pfkey_seq_stop,
3680 .show = pfkey_seq_show,
3681 };
3682
3683 static int pfkey_seq_open(struct inode *inode, struct file *file)
3684 {
3685 return seq_open(file, &pfkey_seq_ops);
3686 }
3687
3688 static struct file_operations pfkey_proc_ops = {
3689 .open = pfkey_seq_open,
3690 .read = seq_read,
3691 .llseek = seq_lseek,
3692 .release = seq_release,
3693 };
3694
3695 static int pfkey_init_proc(void)
3696 {
3697 struct proc_dir_entry *e;
3698
3699 e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops);
3700 if (e == NULL)
3701 return -ENOMEM;
3702
3703 return 0;
3704 }
3705
3706 static void pfkey_exit_proc(void)
3707 {
3708 proc_net_remove(&init_net, "pfkey");
3709 }
3710 #else
3711 static inline int pfkey_init_proc(void)
3712 {
3713 return 0;
3714 }
3715
3716 static inline void pfkey_exit_proc(void)
3717 {
3718 }
3719 #endif
3720
3721 static struct xfrm_mgr pfkeyv2_mgr =
3722 {
3723 .id = "pfkeyv2",
3724 .notify = pfkey_send_notify,
3725 .acquire = pfkey_send_acquire,
3726 .compile_policy = pfkey_compile_policy,
3727 .new_mapping = pfkey_send_new_mapping,
3728 .notify_policy = pfkey_send_policy_notify,
3729 .migrate = pfkey_send_migrate,
3730 };
3731
3732 static void __exit ipsec_pfkey_exit(void)
3733 {
3734 xfrm_unregister_km(&pfkeyv2_mgr);
3735 pfkey_exit_proc();
3736 sock_unregister(PF_KEY);
3737 proto_unregister(&key_proto);
3738 }
3739
3740 static int __init ipsec_pfkey_init(void)
3741 {
3742 int err = proto_register(&key_proto, 0);
3743
3744 if (err != 0)
3745 goto out;
3746
3747 err = sock_register(&pfkey_family_ops);
3748 if (err != 0)
3749 goto out_unregister_key_proto;
3750 err = pfkey_init_proc();
3751 if (err != 0)
3752 goto out_sock_unregister;
3753 err = xfrm_register_km(&pfkeyv2_mgr);
3754 if (err != 0)
3755 goto out_remove_proc_entry;
3756 out:
3757 return err;
3758 out_remove_proc_entry:
3759 pfkey_exit_proc();
3760 out_sock_unregister:
3761 sock_unregister(PF_KEY);
3762 out_unregister_key_proto:
3763 proto_unregister(&key_proto);
3764 goto out;
3765 }
3766
3767 module_init(ipsec_pfkey_init);
3768 module_exit(ipsec_pfkey_exit);
3769 MODULE_LICENSE("GPL");
3770 MODULE_ALIAS_NETPROTO(PF_KEY);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree