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sparc: TIF_ABI_PENDING bit removal
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / key / af_key.c
blob76fa6fef64739c3fb881dafc92947a5e5c1c054c
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/netns/generic.h>
31 #include <net/xfrm.h>
32
33 #include <net/sock.h>
34
35 #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
36 #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
37
38 static int pfkey_net_id __read_mostly;
39 struct netns_pfkey {
40 /* List of all pfkey sockets. */
41 struct hlist_head table;
42 atomic_t socks_nr;
43 };
44 static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
45 static DEFINE_RWLOCK(pfkey_table_lock);
46 static atomic_t pfkey_table_users = ATOMIC_INIT(0);
47
48 struct pfkey_sock {
49 /* struct sock must be the first member of struct pfkey_sock */
50 struct sock sk;
51 int registered;
52 int promisc;
53
54 struct {
55 uint8_t msg_version;
56 uint32_t msg_pid;
57 int (*dump)(struct pfkey_sock *sk);
58 void (*done)(struct pfkey_sock *sk);
59 union {
60 struct xfrm_policy_walk policy;
61 struct xfrm_state_walk state;
62 } u;
63 struct sk_buff *skb;
64 } dump;
65 };
66
67 static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
68 {
69 return (struct pfkey_sock *)sk;
70 }
71
72 static int pfkey_can_dump(struct sock *sk)
73 {
74 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
75 return 1;
76 return 0;
77 }
78
79 static void pfkey_terminate_dump(struct pfkey_sock *pfk)
80 {
81 if (pfk->dump.dump) {
82 if (pfk->dump.skb) {
83 kfree_skb(pfk->dump.skb);
84 pfk->dump.skb = NULL;
85 }
86 pfk->dump.done(pfk);
87 pfk->dump.dump = NULL;
88 pfk->dump.done = NULL;
89 }
90 }
91
92 static void pfkey_sock_destruct(struct sock *sk)
93 {
94 struct net *net = sock_net(sk);
95 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
96
97 pfkey_terminate_dump(pfkey_sk(sk));
98 skb_queue_purge(&sk->sk_receive_queue);
99
100 if (!sock_flag(sk, SOCK_DEAD)) {
101 printk("Attempt to release alive pfkey socket: %p\n", sk);
102 return;
103 }
104
105 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
106 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
107
108 atomic_dec(&net_pfkey->socks_nr);
109 }
110
111 static void pfkey_table_grab(void)
112 {
113 write_lock_bh(&pfkey_table_lock);
114
115 if (atomic_read(&pfkey_table_users)) {
116 DECLARE_WAITQUEUE(wait, current);
117
118 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
119 for(;;) {
120 set_current_state(TASK_UNINTERRUPTIBLE);
121 if (atomic_read(&pfkey_table_users) == 0)
122 break;
123 write_unlock_bh(&pfkey_table_lock);
124 schedule();
125 write_lock_bh(&pfkey_table_lock);
126 }
127
128 __set_current_state(TASK_RUNNING);
129 remove_wait_queue(&pfkey_table_wait, &wait);
130 }
131 }
132
133 static __inline__ void pfkey_table_ungrab(void)
134 {
135 write_unlock_bh(&pfkey_table_lock);
136 wake_up(&pfkey_table_wait);
137 }
138
139 static __inline__ void pfkey_lock_table(void)
140 {
141 /* read_lock() synchronizes us to pfkey_table_grab */
142
143 read_lock(&pfkey_table_lock);
144 atomic_inc(&pfkey_table_users);
145 read_unlock(&pfkey_table_lock);
146 }
147
148 static __inline__ void pfkey_unlock_table(void)
149 {
150 if (atomic_dec_and_test(&pfkey_table_users))
151 wake_up(&pfkey_table_wait);
152 }
153
154
155 static const struct proto_ops pfkey_ops;
156
157 static void pfkey_insert(struct sock *sk)
158 {
159 struct net *net = sock_net(sk);
160 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
161
162 pfkey_table_grab();
163 sk_add_node(sk, &net_pfkey->table);
164 pfkey_table_ungrab();
165 }
166
167 static void pfkey_remove(struct sock *sk)
168 {
169 pfkey_table_grab();
170 sk_del_node_init(sk);
171 pfkey_table_ungrab();
172 }
173
174 static struct proto key_proto = {
175 .name = "KEY",
176 .owner = THIS_MODULE,
177 .obj_size = sizeof(struct pfkey_sock),
178 };
179
180 static int pfkey_create(struct net *net, struct socket *sock, int protocol,
181 int kern)
182 {
183 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
184 struct sock *sk;
185 int err;
186
187 if (!capable(CAP_NET_ADMIN))
188 return -EPERM;
189 if (sock->type != SOCK_RAW)
190 return -ESOCKTNOSUPPORT;
191 if (protocol != PF_KEY_V2)
192 return -EPROTONOSUPPORT;
193
194 err = -ENOMEM;
195 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
196 if (sk == NULL)
197 goto out;
198
199 sock->ops = &pfkey_ops;
200 sock_init_data(sock, sk);
201
202 sk->sk_family = PF_KEY;
203 sk->sk_destruct = pfkey_sock_destruct;
204
205 atomic_inc(&net_pfkey->socks_nr);
206
207 pfkey_insert(sk);
208
209 return 0;
210 out:
211 return err;
212 }
213
214 static int pfkey_release(struct socket *sock)
215 {
216 struct sock *sk = sock->sk;
217
218 if (!sk)
219 return 0;
220
221 pfkey_remove(sk);
222
223 sock_orphan(sk);
224 sock->sk = NULL;
225 skb_queue_purge(&sk->sk_write_queue);
226 sock_put(sk);
227
228 return 0;
229 }
230
231 static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
232 gfp_t allocation, struct sock *sk)
233 {
234 int err = -ENOBUFS;
235
236 sock_hold(sk);
237 if (*skb2 == NULL) {
238 if (atomic_read(&skb->users) != 1) {
239 *skb2 = skb_clone(skb, allocation);
240 } else {
241 *skb2 = skb;
242 atomic_inc(&skb->users);
243 }
244 }
245 if (*skb2 != NULL) {
246 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
247 skb_orphan(*skb2);
248 skb_set_owner_r(*skb2, sk);
249 skb_queue_tail(&sk->sk_receive_queue, *skb2);
250 sk->sk_data_ready(sk, (*skb2)->len);
251 *skb2 = NULL;
252 err = 0;
253 }
254 }
255 sock_put(sk);
256 return err;
257 }
258
259 /* Send SKB to all pfkey sockets matching selected criteria. */
260 #define BROADCAST_ALL 0
261 #define BROADCAST_ONE 1
262 #define BROADCAST_REGISTERED 2
263 #define BROADCAST_PROMISC_ONLY 4
264 static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
265 int broadcast_flags, struct sock *one_sk,
266 struct net *net)
267 {
268 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
269 struct sock *sk;
270 struct hlist_node *node;
271 struct sk_buff *skb2 = NULL;
272 int err = -ESRCH;
273
274 /* XXX Do we need something like netlink_overrun? I think
275 * XXX PF_KEY socket apps will not mind current behavior.
276 */
277 if (!skb)
278 return -ENOMEM;
279
280 pfkey_lock_table();
281 sk_for_each(sk, node, &net_pfkey->table) {
282 struct pfkey_sock *pfk = pfkey_sk(sk);
283 int err2;
284
285 /* Yes, it means that if you are meant to receive this
286 * pfkey message you receive it twice as promiscuous
287 * socket.
288 */
289 if (pfk->promisc)
290 pfkey_broadcast_one(skb, &skb2, allocation, sk);
291
292 /* the exact target will be processed later */
293 if (sk == one_sk)
294 continue;
295 if (broadcast_flags != BROADCAST_ALL) {
296 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
297 continue;
298 if ((broadcast_flags & BROADCAST_REGISTERED) &&
299 !pfk->registered)
300 continue;
301 if (broadcast_flags & BROADCAST_ONE)
302 continue;
303 }
304
305 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
306
307 /* Error is cleare after succecful sending to at least one
308 * registered KM */
309 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
310 err = err2;
311 }
312 pfkey_unlock_table();
313
314 if (one_sk != NULL)
315 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
316
317 kfree_skb(skb2);
318 kfree_skb(skb);
319 return err;
320 }
321
322 static int pfkey_do_dump(struct pfkey_sock *pfk)
323 {
324 struct sadb_msg *hdr;
325 int rc;
326
327 rc = pfk->dump.dump(pfk);
328 if (rc == -ENOBUFS)
329 return 0;
330
331 if (pfk->dump.skb) {
332 if (!pfkey_can_dump(&pfk->sk))
333 return 0;
334
335 hdr = (struct sadb_msg *) pfk->dump.skb->data;
336 hdr->sadb_msg_seq = 0;
337 hdr->sadb_msg_errno = rc;
338 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
339 &pfk->sk, sock_net(&pfk->sk));
340 pfk->dump.skb = NULL;
341 }
342
343 pfkey_terminate_dump(pfk);
344 return rc;
345 }
346
347 static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
348 {
349 *new = *orig;
350 }
351
352 static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
353 {
354 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
355 struct sadb_msg *hdr;
356
357 if (!skb)
358 return -ENOBUFS;
359
360 /* Woe be to the platform trying to support PFKEY yet
361 * having normal errnos outside the 1-255 range, inclusive.
362 */
363 err = -err;
364 if (err == ERESTARTSYS ||
365 err == ERESTARTNOHAND ||
366 err == ERESTARTNOINTR)
367 err = EINTR;
368 if (err >= 512)
369 err = EINVAL;
370 BUG_ON(err <= 0 || err >= 256);
371
372 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
373 pfkey_hdr_dup(hdr, orig);
374 hdr->sadb_msg_errno = (uint8_t) err;
375 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
376 sizeof(uint64_t));
377
378 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
379
380 return 0;
381 }
382
383 static u8 sadb_ext_min_len[] = {
384 [SADB_EXT_RESERVED] = (u8) 0,
385 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
386 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
387 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
388 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
389 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
390 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
391 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
392 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
393 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
394 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
395 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
396 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
397 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
398 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
399 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
400 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
401 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
402 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
403 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
404 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
405 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
406 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
407 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
408 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
409 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
410 };
411
412 /* Verify sadb_address_{len,prefixlen} against sa_family. */
413 static int verify_address_len(void *p)
414 {
415 struct sadb_address *sp = p;
416 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
417 struct sockaddr_in *sin;
418 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
419 struct sockaddr_in6 *sin6;
420 #endif
421 int len;
422
423 switch (addr->sa_family) {
424 case AF_INET:
425 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
426 if (sp->sadb_address_len != len ||
427 sp->sadb_address_prefixlen > 32)
428 return -EINVAL;
429 break;
430 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
431 case AF_INET6:
432 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
433 if (sp->sadb_address_len != len ||
434 sp->sadb_address_prefixlen > 128)
435 return -EINVAL;
436 break;
437 #endif
438 default:
439 /* It is user using kernel to keep track of security
440 * associations for another protocol, such as
441 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
442 * lengths.
443 *
444 * XXX Actually, association/policy database is not yet
445 * XXX able to cope with arbitrary sockaddr families.
446 * XXX When it can, remove this -EINVAL. -DaveM
447 */
448 return -EINVAL;
449 break;
450 }
451
452 return 0;
453 }
454
455 static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
456 {
457 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
458 sec_ctx->sadb_x_ctx_len,
459 sizeof(uint64_t));
460 }
461
462 static inline int verify_sec_ctx_len(void *p)
463 {
464 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
465 int len = sec_ctx->sadb_x_ctx_len;
466
467 if (len > PAGE_SIZE)
468 return -EINVAL;
469
470 len = pfkey_sec_ctx_len(sec_ctx);
471
472 if (sec_ctx->sadb_x_sec_len != len)
473 return -EINVAL;
474
475 return 0;
476 }
477
478 static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
479 {
480 struct xfrm_user_sec_ctx *uctx = NULL;
481 int ctx_size = sec_ctx->sadb_x_ctx_len;
482
483 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
484
485 if (!uctx)
486 return NULL;
487
488 uctx->len = pfkey_sec_ctx_len(sec_ctx);
489 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
490 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
491 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
492 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
493 memcpy(uctx + 1, sec_ctx + 1,
494 uctx->ctx_len);
495
496 return uctx;
497 }
498
499 static int present_and_same_family(struct sadb_address *src,
500 struct sadb_address *dst)
501 {
502 struct sockaddr *s_addr, *d_addr;
503
504 if (!src || !dst)
505 return 0;
506
507 s_addr = (struct sockaddr *)(src + 1);
508 d_addr = (struct sockaddr *)(dst + 1);
509 if (s_addr->sa_family != d_addr->sa_family)
510 return 0;
511 if (s_addr->sa_family != AF_INET
512 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
513 && s_addr->sa_family != AF_INET6
514 #endif
515 )
516 return 0;
517
518 return 1;
519 }
520
521 static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
522 {
523 char *p = (char *) hdr;
524 int len = skb->len;
525
526 len -= sizeof(*hdr);
527 p += sizeof(*hdr);
528 while (len > 0) {
529 struct sadb_ext *ehdr = (struct sadb_ext *) p;
530 uint16_t ext_type;
531 int ext_len;
532
533 ext_len = ehdr->sadb_ext_len;
534 ext_len *= sizeof(uint64_t);
535 ext_type = ehdr->sadb_ext_type;
536 if (ext_len < sizeof(uint64_t) ||
537 ext_len > len ||
538 ext_type == SADB_EXT_RESERVED)
539 return -EINVAL;
540
541 if (ext_type <= SADB_EXT_MAX) {
542 int min = (int) sadb_ext_min_len[ext_type];
543 if (ext_len < min)
544 return -EINVAL;
545 if (ext_hdrs[ext_type-1] != NULL)
546 return -EINVAL;
547 if (ext_type == SADB_EXT_ADDRESS_SRC ||
548 ext_type == SADB_EXT_ADDRESS_DST ||
549 ext_type == SADB_EXT_ADDRESS_PROXY ||
550 ext_type == SADB_X_EXT_NAT_T_OA) {
551 if (verify_address_len(p))
552 return -EINVAL;
553 }
554 if (ext_type == SADB_X_EXT_SEC_CTX) {
555 if (verify_sec_ctx_len(p))
556 return -EINVAL;
557 }
558 ext_hdrs[ext_type-1] = p;
559 }
560 p += ext_len;
561 len -= ext_len;
562 }
563
564 return 0;
565 }
566
567 static uint16_t
568 pfkey_satype2proto(uint8_t satype)
569 {
570 switch (satype) {
571 case SADB_SATYPE_UNSPEC:
572 return IPSEC_PROTO_ANY;
573 case SADB_SATYPE_AH:
574 return IPPROTO_AH;
575 case SADB_SATYPE_ESP:
576 return IPPROTO_ESP;
577 case SADB_X_SATYPE_IPCOMP:
578 return IPPROTO_COMP;
579 break;
580 default:
581 return 0;
582 }
583 /* NOTREACHED */
584 }
585
586 static uint8_t
587 pfkey_proto2satype(uint16_t proto)
588 {
589 switch (proto) {
590 case IPPROTO_AH:
591 return SADB_SATYPE_AH;
592 case IPPROTO_ESP:
593 return SADB_SATYPE_ESP;
594 case IPPROTO_COMP:
595 return SADB_X_SATYPE_IPCOMP;
596 break;
597 default:
598 return 0;
599 }
600 /* NOTREACHED */
601 }
602
603 /* BTW, this scheme means that there is no way with PFKEY2 sockets to
604 * say specifically 'just raw sockets' as we encode them as 255.
605 */
606
607 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
608 {
609 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
610 }
611
612 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
613 {
614 return (proto ? proto : IPSEC_PROTO_ANY);
615 }
616
617 static inline int pfkey_sockaddr_len(sa_family_t family)
618 {
619 switch (family) {
620 case AF_INET:
621 return sizeof(struct sockaddr_in);
622 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
623 case AF_INET6:
624 return sizeof(struct sockaddr_in6);
625 #endif
626 }
627 return 0;
628 }
629
630 static
631 int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
632 {
633 switch (sa->sa_family) {
634 case AF_INET:
635 xaddr->a4 =
636 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
637 return AF_INET;
638 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
639 case AF_INET6:
640 memcpy(xaddr->a6,
641 &((struct sockaddr_in6 *)sa)->sin6_addr,
642 sizeof(struct in6_addr));
643 return AF_INET6;
644 #endif
645 }
646 return 0;
647 }
648
649 static
650 int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
651 {
652 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
653 xaddr);
654 }
655
656 static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, struct sadb_msg *hdr, void **ext_hdrs)
657 {
658 struct sadb_sa *sa;
659 struct sadb_address *addr;
660 uint16_t proto;
661 unsigned short family;
662 xfrm_address_t *xaddr;
663
664 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
665 if (sa == NULL)
666 return NULL;
667
668 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
669 if (proto == 0)
670 return NULL;
671
672 /* sadb_address_len should be checked by caller */
673 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
674 if (addr == NULL)
675 return NULL;
676
677 family = ((struct sockaddr *)(addr + 1))->sa_family;
678 switch (family) {
679 case AF_INET:
680 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
681 break;
682 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
683 case AF_INET6:
684 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
685 break;
686 #endif
687 default:
688 xaddr = NULL;
689 }
690
691 if (!xaddr)
692 return NULL;
693
694 return xfrm_state_lookup(net, xaddr, sa->sadb_sa_spi, proto, family);
695 }
696
697 #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
698
699 static int
700 pfkey_sockaddr_size(sa_family_t family)
701 {
702 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
703 }
704
705 static inline int pfkey_mode_from_xfrm(int mode)
706 {
707 switch(mode) {
708 case XFRM_MODE_TRANSPORT:
709 return IPSEC_MODE_TRANSPORT;
710 case XFRM_MODE_TUNNEL:
711 return IPSEC_MODE_TUNNEL;
712 case XFRM_MODE_BEET:
713 return IPSEC_MODE_BEET;
714 default:
715 return -1;
716 }
717 }
718
719 static inline int pfkey_mode_to_xfrm(int mode)
720 {
721 switch(mode) {
722 case IPSEC_MODE_ANY: /*XXX*/
723 case IPSEC_MODE_TRANSPORT:
724 return XFRM_MODE_TRANSPORT;
725 case IPSEC_MODE_TUNNEL:
726 return XFRM_MODE_TUNNEL;
727 case IPSEC_MODE_BEET:
728 return XFRM_MODE_BEET;
729 default:
730 return -1;
731 }
732 }
733
734 static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port,
735 struct sockaddr *sa,
736 unsigned short family)
737 {
738 switch (family) {
739 case AF_INET:
740 {
741 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
742 sin->sin_family = AF_INET;
743 sin->sin_port = port;
744 sin->sin_addr.s_addr = xaddr->a4;
745 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
746 return 32;
747 }
748 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
749 case AF_INET6:
750 {
751 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
752 sin6->sin6_family = AF_INET6;
753 sin6->sin6_port = port;
754 sin6->sin6_flowinfo = 0;
755 ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6);
756 sin6->sin6_scope_id = 0;
757 return 128;
758 }
759 #endif
760 }
761 return 0;
762 }
763
764 static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
765 int add_keys, int hsc)
766 {
767 struct sk_buff *skb;
768 struct sadb_msg *hdr;
769 struct sadb_sa *sa;
770 struct sadb_lifetime *lifetime;
771 struct sadb_address *addr;
772 struct sadb_key *key;
773 struct sadb_x_sa2 *sa2;
774 struct sadb_x_sec_ctx *sec_ctx;
775 struct xfrm_sec_ctx *xfrm_ctx;
776 int ctx_size = 0;
777 int size;
778 int auth_key_size = 0;
779 int encrypt_key_size = 0;
780 int sockaddr_size;
781 struct xfrm_encap_tmpl *natt = NULL;
782 int mode;
783
784 /* address family check */
785 sockaddr_size = pfkey_sockaddr_size(x->props.family);
786 if (!sockaddr_size)
787 return ERR_PTR(-EINVAL);
788
789 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
790 key(AE), (identity(SD),) (sensitivity)> */
791 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
792 sizeof(struct sadb_lifetime) +
793 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
794 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
795 sizeof(struct sadb_address)*2 +
796 sockaddr_size*2 +
797 sizeof(struct sadb_x_sa2);
798
799 if ((xfrm_ctx = x->security)) {
800 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
801 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
802 }
803
804 /* identity & sensitivity */
805 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
806 size += sizeof(struct sadb_address) + sockaddr_size;
807
808 if (add_keys) {
809 if (x->aalg && x->aalg->alg_key_len) {
810 auth_key_size =
811 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
812 size += sizeof(struct sadb_key) + auth_key_size;
813 }
814 if (x->ealg && x->ealg->alg_key_len) {
815 encrypt_key_size =
816 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
817 size += sizeof(struct sadb_key) + encrypt_key_size;
818 }
819 }
820 if (x->encap)
821 natt = x->encap;
822
823 if (natt && natt->encap_type) {
824 size += sizeof(struct sadb_x_nat_t_type);
825 size += sizeof(struct sadb_x_nat_t_port);
826 size += sizeof(struct sadb_x_nat_t_port);
827 }
828
829 skb = alloc_skb(size + 16, GFP_ATOMIC);
830 if (skb == NULL)
831 return ERR_PTR(-ENOBUFS);
832
833 /* call should fill header later */
834 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
835 memset(hdr, 0, size); /* XXX do we need this ? */
836 hdr->sadb_msg_len = size / sizeof(uint64_t);
837
838 /* sa */
839 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
840 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
841 sa->sadb_sa_exttype = SADB_EXT_SA;
842 sa->sadb_sa_spi = x->id.spi;
843 sa->sadb_sa_replay = x->props.replay_window;
844 switch (x->km.state) {
845 case XFRM_STATE_VALID:
846 sa->sadb_sa_state = x->km.dying ?
847 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
848 break;
849 case XFRM_STATE_ACQ:
850 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
851 break;
852 default:
853 sa->sadb_sa_state = SADB_SASTATE_DEAD;
854 break;
855 }
856 sa->sadb_sa_auth = 0;
857 if (x->aalg) {
858 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
859 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
860 }
861 sa->sadb_sa_encrypt = 0;
862 BUG_ON(x->ealg && x->calg);
863 if (x->ealg) {
864 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
865 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
866 }
867 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
868 if (x->calg) {
869 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
870 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
871 }
872
873 sa->sadb_sa_flags = 0;
874 if (x->props.flags & XFRM_STATE_NOECN)
875 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
876 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
877 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
878 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
879 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
880
881 /* hard time */
882 if (hsc & 2) {
883 lifetime = (struct sadb_lifetime *) skb_put(skb,
884 sizeof(struct sadb_lifetime));
885 lifetime->sadb_lifetime_len =
886 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
887 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
888 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
889 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
890 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
891 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
892 }
893 /* soft time */
894 if (hsc & 1) {
895 lifetime = (struct sadb_lifetime *) skb_put(skb,
896 sizeof(struct sadb_lifetime));
897 lifetime->sadb_lifetime_len =
898 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
899 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
900 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
901 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
902 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
903 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
904 }
905 /* current time */
906 lifetime = (struct sadb_lifetime *) skb_put(skb,
907 sizeof(struct sadb_lifetime));
908 lifetime->sadb_lifetime_len =
909 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
910 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
911 lifetime->sadb_lifetime_allocations = x->curlft.packets;
912 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
913 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
914 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
915 /* src address */
916 addr = (struct sadb_address*) skb_put(skb,
917 sizeof(struct sadb_address)+sockaddr_size);
918 addr->sadb_address_len =
919 (sizeof(struct sadb_address)+sockaddr_size)/
920 sizeof(uint64_t);
921 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
922 /* "if the ports are non-zero, then the sadb_address_proto field,
923 normally zero, MUST be filled in with the transport
924 protocol's number." - RFC2367 */
925 addr->sadb_address_proto = 0;
926 addr->sadb_address_reserved = 0;
927
928 addr->sadb_address_prefixlen =
929 pfkey_sockaddr_fill(&x->props.saddr, 0,
930 (struct sockaddr *) (addr + 1),
931 x->props.family);
932 if (!addr->sadb_address_prefixlen)
933 BUG();
934
935 /* dst address */
936 addr = (struct sadb_address*) skb_put(skb,
937 sizeof(struct sadb_address)+sockaddr_size);
938 addr->sadb_address_len =
939 (sizeof(struct sadb_address)+sockaddr_size)/
940 sizeof(uint64_t);
941 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
942 addr->sadb_address_proto = 0;
943 addr->sadb_address_reserved = 0;
944
945 addr->sadb_address_prefixlen =
946 pfkey_sockaddr_fill(&x->id.daddr, 0,
947 (struct sockaddr *) (addr + 1),
948 x->props.family);
949 if (!addr->sadb_address_prefixlen)
950 BUG();
951
952 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
953 x->props.family)) {
954 addr = (struct sadb_address*) skb_put(skb,
955 sizeof(struct sadb_address)+sockaddr_size);
956 addr->sadb_address_len =
957 (sizeof(struct sadb_address)+sockaddr_size)/
958 sizeof(uint64_t);
959 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
960 addr->sadb_address_proto =
961 pfkey_proto_from_xfrm(x->sel.proto);
962 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
963 addr->sadb_address_reserved = 0;
964
965 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
966 (struct sockaddr *) (addr + 1),
967 x->props.family);
968 }
969
970 /* auth key */
971 if (add_keys && auth_key_size) {
972 key = (struct sadb_key *) skb_put(skb,
973 sizeof(struct sadb_key)+auth_key_size);
974 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
975 sizeof(uint64_t);
976 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
977 key->sadb_key_bits = x->aalg->alg_key_len;
978 key->sadb_key_reserved = 0;
979 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
980 }
981 /* encrypt key */
982 if (add_keys && encrypt_key_size) {
983 key = (struct sadb_key *) skb_put(skb,
984 sizeof(struct sadb_key)+encrypt_key_size);
985 key->sadb_key_len = (sizeof(struct sadb_key) +
986 encrypt_key_size) / sizeof(uint64_t);
987 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
988 key->sadb_key_bits = x->ealg->alg_key_len;
989 key->sadb_key_reserved = 0;
990 memcpy(key + 1, x->ealg->alg_key,
991 (x->ealg->alg_key_len+7)/8);
992 }
993
994 /* sa */
995 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
996 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
997 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
998 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
999 kfree_skb(skb);
1000 return ERR_PTR(-EINVAL);
1001 }
1002 sa2->sadb_x_sa2_mode = mode;
1003 sa2->sadb_x_sa2_reserved1 = 0;
1004 sa2->sadb_x_sa2_reserved2 = 0;
1005 sa2->sadb_x_sa2_sequence = 0;
1006 sa2->sadb_x_sa2_reqid = x->props.reqid;
1007
1008 if (natt && natt->encap_type) {
1009 struct sadb_x_nat_t_type *n_type;
1010 struct sadb_x_nat_t_port *n_port;
1011
1012 /* type */
1013 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
1014 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1015 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1016 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1017 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1018 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1019 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1020
1021 /* source port */
1022 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1023 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1024 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1025 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1026 n_port->sadb_x_nat_t_port_reserved = 0;
1027
1028 /* dest port */
1029 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1030 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1031 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1032 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1033 n_port->sadb_x_nat_t_port_reserved = 0;
1034 }
1035
1036 /* security context */
1037 if (xfrm_ctx) {
1038 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1039 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1040 sec_ctx->sadb_x_sec_len =
1041 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1042 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1043 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1044 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1045 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1046 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1047 xfrm_ctx->ctx_len);
1048 }
1049
1050 return skb;
1051 }
1052
1053
1054 static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1055 {
1056 struct sk_buff *skb;
1057
1058 skb = __pfkey_xfrm_state2msg(x, 1, 3);
1059
1060 return skb;
1061 }
1062
1063 static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1064 int hsc)
1065 {
1066 return __pfkey_xfrm_state2msg(x, 0, hsc);
1067 }
1068
1069 static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1070 struct sadb_msg *hdr,
1071 void **ext_hdrs)
1072 {
1073 struct xfrm_state *x;
1074 struct sadb_lifetime *lifetime;
1075 struct sadb_sa *sa;
1076 struct sadb_key *key;
1077 struct sadb_x_sec_ctx *sec_ctx;
1078 uint16_t proto;
1079 int err;
1080
1081
1082 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1083 if (!sa ||
1084 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1085 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1086 return ERR_PTR(-EINVAL);
1087 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1088 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1089 return ERR_PTR(-EINVAL);
1090 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1091 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1092 return ERR_PTR(-EINVAL);
1093 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1094 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1095 return ERR_PTR(-EINVAL);
1096
1097 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1098 if (proto == 0)
1099 return ERR_PTR(-EINVAL);
1100
1101 /* default error is no buffer space */
1102 err = -ENOBUFS;
1103
1104 /* RFC2367:
1105
1106 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1107 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1108 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1109 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1110 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1111 not true.
1112
1113 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1114 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1115 */
1116 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1117 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1118 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1119 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1120 return ERR_PTR(-EINVAL);
1121 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1122 if (key != NULL &&
1123 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1124 ((key->sadb_key_bits+7) / 8 == 0 ||
1125 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1126 return ERR_PTR(-EINVAL);
1127 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1128 if (key != NULL &&
1129 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1130 ((key->sadb_key_bits+7) / 8 == 0 ||
1131 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1132 return ERR_PTR(-EINVAL);
1133
1134 x = xfrm_state_alloc(net);
1135 if (x == NULL)
1136 return ERR_PTR(-ENOBUFS);
1137
1138 x->id.proto = proto;
1139 x->id.spi = sa->sadb_sa_spi;
1140 x->props.replay_window = sa->sadb_sa_replay;
1141 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1142 x->props.flags |= XFRM_STATE_NOECN;
1143 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1144 x->props.flags |= XFRM_STATE_DECAP_DSCP;
1145 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1146 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1147
1148 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1149 if (lifetime != NULL) {
1150 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1151 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1152 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1153 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1154 }
1155 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1156 if (lifetime != NULL) {
1157 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1158 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1159 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1160 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1161 }
1162
1163 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1164 if (sec_ctx != NULL) {
1165 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1166
1167 if (!uctx)
1168 goto out;
1169
1170 err = security_xfrm_state_alloc(x, uctx);
1171 kfree(uctx);
1172
1173 if (err)
1174 goto out;
1175 }
1176
1177 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1178 if (sa->sadb_sa_auth) {
1179 int keysize = 0;
1180 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1181 if (!a) {
1182 err = -ENOSYS;
1183 goto out;
1184 }
1185 if (key)
1186 keysize = (key->sadb_key_bits + 7) / 8;
1187 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1188 if (!x->aalg)
1189 goto out;
1190 strcpy(x->aalg->alg_name, a->name);
1191 x->aalg->alg_key_len = 0;
1192 if (key) {
1193 x->aalg->alg_key_len = key->sadb_key_bits;
1194 memcpy(x->aalg->alg_key, key+1, keysize);
1195 }
1196 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1197 x->props.aalgo = sa->sadb_sa_auth;
1198 /* x->algo.flags = sa->sadb_sa_flags; */
1199 }
1200 if (sa->sadb_sa_encrypt) {
1201 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1202 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1203 if (!a) {
1204 err = -ENOSYS;
1205 goto out;
1206 }
1207 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1208 if (!x->calg)
1209 goto out;
1210 strcpy(x->calg->alg_name, a->name);
1211 x->props.calgo = sa->sadb_sa_encrypt;
1212 } else {
1213 int keysize = 0;
1214 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1215 if (!a) {
1216 err = -ENOSYS;
1217 goto out;
1218 }
1219 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1220 if (key)
1221 keysize = (key->sadb_key_bits + 7) / 8;
1222 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1223 if (!x->ealg)
1224 goto out;
1225 strcpy(x->ealg->alg_name, a->name);
1226 x->ealg->alg_key_len = 0;
1227 if (key) {
1228 x->ealg->alg_key_len = key->sadb_key_bits;
1229 memcpy(x->ealg->alg_key, key+1, keysize);
1230 }
1231 x->props.ealgo = sa->sadb_sa_encrypt;
1232 }
1233 }
1234 /* x->algo.flags = sa->sadb_sa_flags; */
1235
1236 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1237 &x->props.saddr);
1238 if (!x->props.family) {
1239 err = -EAFNOSUPPORT;
1240 goto out;
1241 }
1242 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1243 &x->id.daddr);
1244
1245 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1246 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1247 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1248 if (mode < 0) {
1249 err = -EINVAL;
1250 goto out;
1251 }
1252 x->props.mode = mode;
1253 x->props.reqid = sa2->sadb_x_sa2_reqid;
1254 }
1255
1256 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1257 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1258
1259 /* Nobody uses this, but we try. */
1260 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1261 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1262 }
1263
1264 if (!x->sel.family)
1265 x->sel.family = x->props.family;
1266
1267 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1268 struct sadb_x_nat_t_type* n_type;
1269 struct xfrm_encap_tmpl *natt;
1270
1271 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1272 if (!x->encap)
1273 goto out;
1274
1275 natt = x->encap;
1276 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1277 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1278
1279 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1280 struct sadb_x_nat_t_port* n_port =
1281 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1282 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1283 }
1284 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1285 struct sadb_x_nat_t_port* n_port =
1286 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1287 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1288 }
1289 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1290 }
1291
1292 err = xfrm_init_state(x);
1293 if (err)
1294 goto out;
1295
1296 x->km.seq = hdr->sadb_msg_seq;
1297 return x;
1298
1299 out:
1300 x->km.state = XFRM_STATE_DEAD;
1301 xfrm_state_put(x);
1302 return ERR_PTR(err);
1303 }
1304
1305 static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1306 {
1307 return -EOPNOTSUPP;
1308 }
1309
1310 static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1311 {
1312 struct net *net = sock_net(sk);
1313 struct sk_buff *resp_skb;
1314 struct sadb_x_sa2 *sa2;
1315 struct sadb_address *saddr, *daddr;
1316 struct sadb_msg *out_hdr;
1317 struct sadb_spirange *range;
1318 struct xfrm_state *x = NULL;
1319 int mode;
1320 int err;
1321 u32 min_spi, max_spi;
1322 u32 reqid;
1323 u8 proto;
1324 unsigned short family;
1325 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1326
1327 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1328 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1329 return -EINVAL;
1330
1331 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1332 if (proto == 0)
1333 return -EINVAL;
1334
1335 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
1336 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1337 if (mode < 0)
1338 return -EINVAL;
1339 reqid = sa2->sadb_x_sa2_reqid;
1340 } else {
1341 mode = 0;
1342 reqid = 0;
1343 }
1344
1345 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1346 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1347
1348 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1349 switch (family) {
1350 case AF_INET:
1351 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1352 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1353 break;
1354 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1355 case AF_INET6:
1356 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1357 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1358 break;
1359 #endif
1360 }
1361
1362 if (hdr->sadb_msg_seq) {
1363 x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
1364 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1365 xfrm_state_put(x);
1366 x = NULL;
1367 }
1368 }
1369
1370 if (!x)
1371 x = xfrm_find_acq(net, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1372
1373 if (x == NULL)
1374 return -ENOENT;
1375
1376 min_spi = 0x100;
1377 max_spi = 0x0fffffff;
1378
1379 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1380 if (range) {
1381 min_spi = range->sadb_spirange_min;
1382 max_spi = range->sadb_spirange_max;
1383 }
1384
1385 err = xfrm_alloc_spi(x, min_spi, max_spi);
1386 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1387
1388 if (IS_ERR(resp_skb)) {
1389 xfrm_state_put(x);
1390 return PTR_ERR(resp_skb);
1391 }
1392
1393 out_hdr = (struct sadb_msg *) resp_skb->data;
1394 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1395 out_hdr->sadb_msg_type = SADB_GETSPI;
1396 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1397 out_hdr->sadb_msg_errno = 0;
1398 out_hdr->sadb_msg_reserved = 0;
1399 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1400 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1401
1402 xfrm_state_put(x);
1403
1404 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1405
1406 return 0;
1407 }
1408
1409 static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1410 {
1411 struct net *net = sock_net(sk);
1412 struct xfrm_state *x;
1413
1414 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1415 return -EOPNOTSUPP;
1416
1417 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1418 return 0;
1419
1420 x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
1421 if (x == NULL)
1422 return 0;
1423
1424 spin_lock_bh(&x->lock);
1425 if (x->km.state == XFRM_STATE_ACQ) {
1426 x->km.state = XFRM_STATE_ERROR;
1427 wake_up(&net->xfrm.km_waitq);
1428 }
1429 spin_unlock_bh(&x->lock);
1430 xfrm_state_put(x);
1431 return 0;
1432 }
1433
1434 static inline int event2poltype(int event)
1435 {
1436 switch (event) {
1437 case XFRM_MSG_DELPOLICY:
1438 return SADB_X_SPDDELETE;
1439 case XFRM_MSG_NEWPOLICY:
1440 return SADB_X_SPDADD;
1441 case XFRM_MSG_UPDPOLICY:
1442 return SADB_X_SPDUPDATE;
1443 case XFRM_MSG_POLEXPIRE:
1444 // return SADB_X_SPDEXPIRE;
1445 default:
1446 printk("pfkey: Unknown policy event %d\n", event);
1447 break;
1448 }
1449
1450 return 0;
1451 }
1452
1453 static inline int event2keytype(int event)
1454 {
1455 switch (event) {
1456 case XFRM_MSG_DELSA:
1457 return SADB_DELETE;
1458 case XFRM_MSG_NEWSA:
1459 return SADB_ADD;
1460 case XFRM_MSG_UPDSA:
1461 return SADB_UPDATE;
1462 case XFRM_MSG_EXPIRE:
1463 return SADB_EXPIRE;
1464 default:
1465 printk("pfkey: Unknown SA event %d\n", event);
1466 break;
1467 }
1468
1469 return 0;
1470 }
1471
1472 /* ADD/UPD/DEL */
1473 static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1474 {
1475 struct sk_buff *skb;
1476 struct sadb_msg *hdr;
1477
1478 skb = pfkey_xfrm_state2msg(x);
1479
1480 if (IS_ERR(skb))
1481 return PTR_ERR(skb);
1482
1483 hdr = (struct sadb_msg *) skb->data;
1484 hdr->sadb_msg_version = PF_KEY_V2;
1485 hdr->sadb_msg_type = event2keytype(c->event);
1486 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1487 hdr->sadb_msg_errno = 0;
1488 hdr->sadb_msg_reserved = 0;
1489 hdr->sadb_msg_seq = c->seq;
1490 hdr->sadb_msg_pid = c->pid;
1491
1492 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1493
1494 return 0;
1495 }
1496
1497 static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1498 {
1499 struct net *net = sock_net(sk);
1500 struct xfrm_state *x;
1501 int err;
1502 struct km_event c;
1503
1504 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1505 if (IS_ERR(x))
1506 return PTR_ERR(x);
1507
1508 xfrm_state_hold(x);
1509 if (hdr->sadb_msg_type == SADB_ADD)
1510 err = xfrm_state_add(x);
1511 else
1512 err = xfrm_state_update(x);
1513
1514 xfrm_audit_state_add(x, err ? 0 : 1,
1515 audit_get_loginuid(current),
1516 audit_get_sessionid(current), 0);
1517
1518 if (err < 0) {
1519 x->km.state = XFRM_STATE_DEAD;
1520 __xfrm_state_put(x);
1521 goto out;
1522 }
1523
1524 if (hdr->sadb_msg_type == SADB_ADD)
1525 c.event = XFRM_MSG_NEWSA;
1526 else
1527 c.event = XFRM_MSG_UPDSA;
1528 c.seq = hdr->sadb_msg_seq;
1529 c.pid = hdr->sadb_msg_pid;
1530 km_state_notify(x, &c);
1531 out:
1532 xfrm_state_put(x);
1533 return err;
1534 }
1535
1536 static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1537 {
1538 struct net *net = sock_net(sk);
1539 struct xfrm_state *x;
1540 struct km_event c;
1541 int err;
1542
1543 if (!ext_hdrs[SADB_EXT_SA-1] ||
1544 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1545 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1546 return -EINVAL;
1547
1548 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1549 if (x == NULL)
1550 return -ESRCH;
1551
1552 if ((err = security_xfrm_state_delete(x)))
1553 goto out;
1554
1555 if (xfrm_state_kern(x)) {
1556 err = -EPERM;
1557 goto out;
1558 }
1559
1560 err = xfrm_state_delete(x);
1561
1562 if (err < 0)
1563 goto out;
1564
1565 c.seq = hdr->sadb_msg_seq;
1566 c.pid = hdr->sadb_msg_pid;
1567 c.event = XFRM_MSG_DELSA;
1568 km_state_notify(x, &c);
1569 out:
1570 xfrm_audit_state_delete(x, err ? 0 : 1,
1571 audit_get_loginuid(current),
1572 audit_get_sessionid(current), 0);
1573 xfrm_state_put(x);
1574
1575 return err;
1576 }
1577
1578 static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1579 {
1580 struct net *net = sock_net(sk);
1581 __u8 proto;
1582 struct sk_buff *out_skb;
1583 struct sadb_msg *out_hdr;
1584 struct xfrm_state *x;
1585
1586 if (!ext_hdrs[SADB_EXT_SA-1] ||
1587 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1588 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1589 return -EINVAL;
1590
1591 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1592 if (x == NULL)
1593 return -ESRCH;
1594
1595 out_skb = pfkey_xfrm_state2msg(x);
1596 proto = x->id.proto;
1597 xfrm_state_put(x);
1598 if (IS_ERR(out_skb))
1599 return PTR_ERR(out_skb);
1600
1601 out_hdr = (struct sadb_msg *) out_skb->data;
1602 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1603 out_hdr->sadb_msg_type = SADB_GET;
1604 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1605 out_hdr->sadb_msg_errno = 0;
1606 out_hdr->sadb_msg_reserved = 0;
1607 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1608 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1609 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1610
1611 return 0;
1612 }
1613
1614 static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
1615 gfp_t allocation)
1616 {
1617 struct sk_buff *skb;
1618 struct sadb_msg *hdr;
1619 int len, auth_len, enc_len, i;
1620
1621 auth_len = xfrm_count_auth_supported();
1622 if (auth_len) {
1623 auth_len *= sizeof(struct sadb_alg);
1624 auth_len += sizeof(struct sadb_supported);
1625 }
1626
1627 enc_len = xfrm_count_enc_supported();
1628 if (enc_len) {
1629 enc_len *= sizeof(struct sadb_alg);
1630 enc_len += sizeof(struct sadb_supported);
1631 }
1632
1633 len = enc_len + auth_len + sizeof(struct sadb_msg);
1634
1635 skb = alloc_skb(len + 16, allocation);
1636 if (!skb)
1637 goto out_put_algs;
1638
1639 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1640 pfkey_hdr_dup(hdr, orig);
1641 hdr->sadb_msg_errno = 0;
1642 hdr->sadb_msg_len = len / sizeof(uint64_t);
1643
1644 if (auth_len) {
1645 struct sadb_supported *sp;
1646 struct sadb_alg *ap;
1647
1648 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1649 ap = (struct sadb_alg *) (sp + 1);
1650
1651 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1652 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1653
1654 for (i = 0; ; i++) {
1655 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1656 if (!aalg)
1657 break;
1658 if (aalg->available)
1659 *ap++ = aalg->desc;
1660 }
1661 }
1662
1663 if (enc_len) {
1664 struct sadb_supported *sp;
1665 struct sadb_alg *ap;
1666
1667 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1668 ap = (struct sadb_alg *) (sp + 1);
1669
1670 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1671 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1672
1673 for (i = 0; ; i++) {
1674 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1675 if (!ealg)
1676 break;
1677 if (ealg->available)
1678 *ap++ = ealg->desc;
1679 }
1680 }
1681
1682 out_put_algs:
1683 return skb;
1684 }
1685
1686 static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1687 {
1688 struct pfkey_sock *pfk = pfkey_sk(sk);
1689 struct sk_buff *supp_skb;
1690
1691 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1692 return -EINVAL;
1693
1694 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1695 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1696 return -EEXIST;
1697 pfk->registered |= (1<<hdr->sadb_msg_satype);
1698 }
1699
1700 xfrm_probe_algs();
1701
1702 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1703 if (!supp_skb) {
1704 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1705 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1706
1707 return -ENOBUFS;
1708 }
1709
1710 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
1711
1712 return 0;
1713 }
1714
1715 static int key_notify_sa_flush(struct km_event *c)
1716 {
1717 struct sk_buff *skb;
1718 struct sadb_msg *hdr;
1719
1720 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1721 if (!skb)
1722 return -ENOBUFS;
1723 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1724 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
1725 hdr->sadb_msg_type = SADB_FLUSH;
1726 hdr->sadb_msg_seq = c->seq;
1727 hdr->sadb_msg_pid = c->pid;
1728 hdr->sadb_msg_version = PF_KEY_V2;
1729 hdr->sadb_msg_errno = (uint8_t) 0;
1730 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1731
1732 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1733
1734 return 0;
1735 }
1736
1737 static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1738 {
1739 struct net *net = sock_net(sk);
1740 unsigned proto;
1741 struct km_event c;
1742 struct xfrm_audit audit_info;
1743 int err;
1744
1745 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1746 if (proto == 0)
1747 return -EINVAL;
1748
1749 audit_info.loginuid = audit_get_loginuid(current);
1750 audit_info.sessionid = audit_get_sessionid(current);
1751 audit_info.secid = 0;
1752 err = xfrm_state_flush(net, proto, &audit_info);
1753 if (err)
1754 return err;
1755 c.data.proto = proto;
1756 c.seq = hdr->sadb_msg_seq;
1757 c.pid = hdr->sadb_msg_pid;
1758 c.event = XFRM_MSG_FLUSHSA;
1759 c.net = net;
1760 km_state_notify(NULL, &c);
1761
1762 return 0;
1763 }
1764
1765 static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1766 {
1767 struct pfkey_sock *pfk = ptr;
1768 struct sk_buff *out_skb;
1769 struct sadb_msg *out_hdr;
1770
1771 if (!pfkey_can_dump(&pfk->sk))
1772 return -ENOBUFS;
1773
1774 out_skb = pfkey_xfrm_state2msg(x);
1775 if (IS_ERR(out_skb))
1776 return PTR_ERR(out_skb);
1777
1778 out_hdr = (struct sadb_msg *) out_skb->data;
1779 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1780 out_hdr->sadb_msg_type = SADB_DUMP;
1781 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1782 out_hdr->sadb_msg_errno = 0;
1783 out_hdr->sadb_msg_reserved = 0;
1784 out_hdr->sadb_msg_seq = count + 1;
1785 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
1786
1787 if (pfk->dump.skb)
1788 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1789 &pfk->sk, sock_net(&pfk->sk));
1790 pfk->dump.skb = out_skb;
1791
1792 return 0;
1793 }
1794
1795 static int pfkey_dump_sa(struct pfkey_sock *pfk)
1796 {
1797 struct net *net = sock_net(&pfk->sk);
1798 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1799 }
1800
1801 static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1802 {
1803 xfrm_state_walk_done(&pfk->dump.u.state);
1804 }
1805
1806 static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1807 {
1808 u8 proto;
1809 struct pfkey_sock *pfk = pfkey_sk(sk);
1810
1811 if (pfk->dump.dump != NULL)
1812 return -EBUSY;
1813
1814 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1815 if (proto == 0)
1816 return -EINVAL;
1817
1818 pfk->dump.msg_version = hdr->sadb_msg_version;
1819 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1820 pfk->dump.dump = pfkey_dump_sa;
1821 pfk->dump.done = pfkey_dump_sa_done;
1822 xfrm_state_walk_init(&pfk->dump.u.state, proto);
1823
1824 return pfkey_do_dump(pfk);
1825 }
1826
1827 static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1828 {
1829 struct pfkey_sock *pfk = pfkey_sk(sk);
1830 int satype = hdr->sadb_msg_satype;
1831
1832 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1833 /* XXX we mangle packet... */
1834 hdr->sadb_msg_errno = 0;
1835 if (satype != 0 && satype != 1)
1836 return -EINVAL;
1837 pfk->promisc = satype;
1838 }
1839 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1840 return 0;
1841 }
1842
1843 static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1844 {
1845 int i;
1846 u32 reqid = *(u32*)ptr;
1847
1848 for (i=0; i<xp->xfrm_nr; i++) {
1849 if (xp->xfrm_vec[i].reqid == reqid)
1850 return -EEXIST;
1851 }
1852 return 0;
1853 }
1854
1855 static u32 gen_reqid(struct net *net)
1856 {
1857 struct xfrm_policy_walk walk;
1858 u32 start;
1859 int rc;
1860 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1861
1862 start = reqid;
1863 do {
1864 ++reqid;
1865 if (reqid == 0)
1866 reqid = IPSEC_MANUAL_REQID_MAX+1;
1867 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1868 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1869 xfrm_policy_walk_done(&walk);
1870 if (rc != -EEXIST)
1871 return reqid;
1872 } while (reqid != start);
1873 return 0;
1874 }
1875
1876 static int
1877 parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1878 {
1879 struct net *net = xp_net(xp);
1880 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1881 int mode;
1882
1883 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1884 return -ELOOP;
1885
1886 if (rq->sadb_x_ipsecrequest_mode == 0)
1887 return -EINVAL;
1888
1889 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
1890 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1891 return -EINVAL;
1892 t->mode = mode;
1893 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1894 t->optional = 1;
1895 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1896 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1897 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1898 t->reqid = 0;
1899 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1900 return -ENOBUFS;
1901 }
1902
1903 /* addresses present only in tunnel mode */
1904 if (t->mode == XFRM_MODE_TUNNEL) {
1905 u8 *sa = (u8 *) (rq + 1);
1906 int family, socklen;
1907
1908 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1909 &t->saddr);
1910 if (!family)
1911 return -EINVAL;
1912
1913 socklen = pfkey_sockaddr_len(family);
1914 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1915 &t->id.daddr) != family)
1916 return -EINVAL;
1917 t->encap_family = family;
1918 } else
1919 t->encap_family = xp->family;
1920
1921 /* No way to set this via kame pfkey */
1922 t->allalgs = 1;
1923 xp->xfrm_nr++;
1924 return 0;
1925 }
1926
1927 static int
1928 parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1929 {
1930 int err;
1931 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1932 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1933
1934 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1935 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1936 return err;
1937 len -= rq->sadb_x_ipsecrequest_len;
1938 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1939 }
1940 return 0;
1941 }
1942
1943 static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1944 {
1945 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1946
1947 if (xfrm_ctx) {
1948 int len = sizeof(struct sadb_x_sec_ctx);
1949 len += xfrm_ctx->ctx_len;
1950 return PFKEY_ALIGN8(len);
1951 }
1952 return 0;
1953 }
1954
1955 static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1956 {
1957 struct xfrm_tmpl *t;
1958 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1959 int socklen = 0;
1960 int i;
1961
1962 for (i=0; i<xp->xfrm_nr; i++) {
1963 t = xp->xfrm_vec + i;
1964 socklen += pfkey_sockaddr_len(t->encap_family);
1965 }
1966
1967 return sizeof(struct sadb_msg) +
1968 (sizeof(struct sadb_lifetime) * 3) +
1969 (sizeof(struct sadb_address) * 2) +
1970 (sockaddr_size * 2) +
1971 sizeof(struct sadb_x_policy) +
1972 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1973 (socklen * 2) +
1974 pfkey_xfrm_policy2sec_ctx_size(xp);
1975 }
1976
1977 static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1978 {
1979 struct sk_buff *skb;
1980 int size;
1981
1982 size = pfkey_xfrm_policy2msg_size(xp);
1983
1984 skb = alloc_skb(size + 16, GFP_ATOMIC);
1985 if (skb == NULL)
1986 return ERR_PTR(-ENOBUFS);
1987
1988 return skb;
1989 }
1990
1991 static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1992 {
1993 struct sadb_msg *hdr;
1994 struct sadb_address *addr;
1995 struct sadb_lifetime *lifetime;
1996 struct sadb_x_policy *pol;
1997 struct sadb_x_sec_ctx *sec_ctx;
1998 struct xfrm_sec_ctx *xfrm_ctx;
1999 int i;
2000 int size;
2001 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2002 int socklen = pfkey_sockaddr_len(xp->family);
2003
2004 size = pfkey_xfrm_policy2msg_size(xp);
2005
2006 /* call should fill header later */
2007 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2008 memset(hdr, 0, size); /* XXX do we need this ? */
2009
2010 /* src address */
2011 addr = (struct sadb_address*) skb_put(skb,
2012 sizeof(struct sadb_address)+sockaddr_size);
2013 addr->sadb_address_len =
2014 (sizeof(struct sadb_address)+sockaddr_size)/
2015 sizeof(uint64_t);
2016 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2017 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2018 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2019 addr->sadb_address_reserved = 0;
2020 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2021 xp->selector.sport,
2022 (struct sockaddr *) (addr + 1),
2023 xp->family))
2024 BUG();
2025
2026 /* dst address */
2027 addr = (struct sadb_address*) skb_put(skb,
2028 sizeof(struct sadb_address)+sockaddr_size);
2029 addr->sadb_address_len =
2030 (sizeof(struct sadb_address)+sockaddr_size)/
2031 sizeof(uint64_t);
2032 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2033 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2034 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
2035 addr->sadb_address_reserved = 0;
2036
2037 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2038 (struct sockaddr *) (addr + 1),
2039 xp->family);
2040
2041 /* hard 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_HARD;
2047 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2048 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2049 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2050 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2051 /* soft time */
2052 lifetime = (struct sadb_lifetime *) skb_put(skb,
2053 sizeof(struct sadb_lifetime));
2054 lifetime->sadb_lifetime_len =
2055 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2056 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2057 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2058 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2059 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2060 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2061 /* current time */
2062 lifetime = (struct sadb_lifetime *) skb_put(skb,
2063 sizeof(struct sadb_lifetime));
2064 lifetime->sadb_lifetime_len =
2065 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2066 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2067 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2068 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2069 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2070 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2071
2072 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2073 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2074 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2075 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2076 if (xp->action == XFRM_POLICY_ALLOW) {
2077 if (xp->xfrm_nr)
2078 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2079 else
2080 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2081 }
2082 pol->sadb_x_policy_dir = dir+1;
2083 pol->sadb_x_policy_id = xp->index;
2084 pol->sadb_x_policy_priority = xp->priority;
2085
2086 for (i=0; i<xp->xfrm_nr; i++) {
2087 struct sadb_x_ipsecrequest *rq;
2088 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2089 int req_size;
2090 int mode;
2091
2092 req_size = sizeof(struct sadb_x_ipsecrequest);
2093 if (t->mode == XFRM_MODE_TUNNEL) {
2094 socklen = pfkey_sockaddr_len(t->encap_family);
2095 req_size += socklen * 2;
2096 } else {
2097 size -= 2*socklen;
2098 }
2099 rq = (void*)skb_put(skb, req_size);
2100 pol->sadb_x_policy_len += req_size/8;
2101 memset(rq, 0, sizeof(*rq));
2102 rq->sadb_x_ipsecrequest_len = req_size;
2103 rq->sadb_x_ipsecrequest_proto = t->id.proto;
2104 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2105 return -EINVAL;
2106 rq->sadb_x_ipsecrequest_mode = mode;
2107 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2108 if (t->reqid)
2109 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2110 if (t->optional)
2111 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2112 rq->sadb_x_ipsecrequest_reqid = t->reqid;
2113
2114 if (t->mode == XFRM_MODE_TUNNEL) {
2115 u8 *sa = (void *)(rq + 1);
2116 pfkey_sockaddr_fill(&t->saddr, 0,
2117 (struct sockaddr *)sa,
2118 t->encap_family);
2119 pfkey_sockaddr_fill(&t->id.daddr, 0,
2120 (struct sockaddr *) (sa + socklen),
2121 t->encap_family);
2122 }
2123 }
2124
2125 /* security context */
2126 if ((xfrm_ctx = xp->security)) {
2127 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2128
2129 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2130 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2131 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2132 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2133 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2134 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2135 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2136 xfrm_ctx->ctx_len);
2137 }
2138
2139 hdr->sadb_msg_len = size / sizeof(uint64_t);
2140 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2141
2142 return 0;
2143 }
2144
2145 static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2146 {
2147 struct sk_buff *out_skb;
2148 struct sadb_msg *out_hdr;
2149 int err;
2150
2151 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2152 if (IS_ERR(out_skb)) {
2153 err = PTR_ERR(out_skb);
2154 goto out;
2155 }
2156 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2157 if (err < 0)
2158 return err;
2159
2160 out_hdr = (struct sadb_msg *) out_skb->data;
2161 out_hdr->sadb_msg_version = PF_KEY_V2;
2162
2163 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2164 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2165 else
2166 out_hdr->sadb_msg_type = event2poltype(c->event);
2167 out_hdr->sadb_msg_errno = 0;
2168 out_hdr->sadb_msg_seq = c->seq;
2169 out_hdr->sadb_msg_pid = c->pid;
2170 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2171 out:
2172 return 0;
2173
2174 }
2175
2176 static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2177 {
2178 struct net *net = sock_net(sk);
2179 int err = 0;
2180 struct sadb_lifetime *lifetime;
2181 struct sadb_address *sa;
2182 struct sadb_x_policy *pol;
2183 struct xfrm_policy *xp;
2184 struct km_event c;
2185 struct sadb_x_sec_ctx *sec_ctx;
2186
2187 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2188 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2189 !ext_hdrs[SADB_X_EXT_POLICY-1])
2190 return -EINVAL;
2191
2192 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2193 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2194 return -EINVAL;
2195 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2196 return -EINVAL;
2197
2198 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2199 if (xp == NULL)
2200 return -ENOBUFS;
2201
2202 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2203 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2204 xp->priority = pol->sadb_x_policy_priority;
2205
2206 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2207 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2208 if (!xp->family) {
2209 err = -EINVAL;
2210 goto out;
2211 }
2212 xp->selector.family = xp->family;
2213 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2214 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2215 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2216 if (xp->selector.sport)
2217 xp->selector.sport_mask = htons(0xffff);
2218
2219 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2220 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2221 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2222
2223 /* Amusing, we set this twice. KAME apps appear to set same value
2224 * in both addresses.
2225 */
2226 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2227
2228 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2229 if (xp->selector.dport)
2230 xp->selector.dport_mask = htons(0xffff);
2231
2232 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2233 if (sec_ctx != NULL) {
2234 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2235
2236 if (!uctx) {
2237 err = -ENOBUFS;
2238 goto out;
2239 }
2240
2241 err = security_xfrm_policy_alloc(&xp->security, uctx);
2242 kfree(uctx);
2243
2244 if (err)
2245 goto out;
2246 }
2247
2248 xp->lft.soft_byte_limit = XFRM_INF;
2249 xp->lft.hard_byte_limit = XFRM_INF;
2250 xp->lft.soft_packet_limit = XFRM_INF;
2251 xp->lft.hard_packet_limit = XFRM_INF;
2252 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2253 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2254 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2255 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2256 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2257 }
2258 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2259 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2260 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2261 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2262 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2263 }
2264 xp->xfrm_nr = 0;
2265 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2266 (err = parse_ipsecrequests(xp, pol)) < 0)
2267 goto out;
2268
2269 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2270 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2271
2272 xfrm_audit_policy_add(xp, err ? 0 : 1,
2273 audit_get_loginuid(current),
2274 audit_get_sessionid(current), 0);
2275
2276 if (err)
2277 goto out;
2278
2279 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2280 c.event = XFRM_MSG_UPDPOLICY;
2281 else
2282 c.event = XFRM_MSG_NEWPOLICY;
2283
2284 c.seq = hdr->sadb_msg_seq;
2285 c.pid = hdr->sadb_msg_pid;
2286
2287 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2288 xfrm_pol_put(xp);
2289 return 0;
2290
2291 out:
2292 xp->walk.dead = 1;
2293 xfrm_policy_destroy(xp);
2294 return err;
2295 }
2296
2297 static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2298 {
2299 struct net *net = sock_net(sk);
2300 int err;
2301 struct sadb_address *sa;
2302 struct sadb_x_policy *pol;
2303 struct xfrm_policy *xp;
2304 struct xfrm_selector sel;
2305 struct km_event c;
2306 struct sadb_x_sec_ctx *sec_ctx;
2307 struct xfrm_sec_ctx *pol_ctx = NULL;
2308
2309 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2310 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2311 !ext_hdrs[SADB_X_EXT_POLICY-1])
2312 return -EINVAL;
2313
2314 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2315 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2316 return -EINVAL;
2317
2318 memset(&sel, 0, sizeof(sel));
2319
2320 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2321 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2322 sel.prefixlen_s = sa->sadb_address_prefixlen;
2323 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325 if (sel.sport)
2326 sel.sport_mask = htons(0xffff);
2327
2328 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
2329 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2330 sel.prefixlen_d = sa->sadb_address_prefixlen;
2331 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2332 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2333 if (sel.dport)
2334 sel.dport_mask = htons(0xffff);
2335
2336 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2337 if (sec_ctx != NULL) {
2338 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2339
2340 if (!uctx)
2341 return -ENOMEM;
2342
2343 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2344 kfree(uctx);
2345 if (err)
2346 return err;
2347 }
2348
2349 xp = xfrm_policy_bysel_ctx(net, XFRM_POLICY_TYPE_MAIN,
2350 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2351 1, &err);
2352 security_xfrm_policy_free(pol_ctx);
2353 if (xp == NULL)
2354 return -ENOENT;
2355
2356 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2357 audit_get_loginuid(current),
2358 audit_get_sessionid(current), 0);
2359
2360 if (err)
2361 goto out;
2362
2363 c.seq = hdr->sadb_msg_seq;
2364 c.pid = hdr->sadb_msg_pid;
2365 c.data.byid = 0;
2366 c.event = XFRM_MSG_DELPOLICY;
2367 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2368
2369 out:
2370 xfrm_pol_put(xp);
2371 return err;
2372 }
2373
2374 static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2375 {
2376 int err;
2377 struct sk_buff *out_skb;
2378 struct sadb_msg *out_hdr;
2379 err = 0;
2380
2381 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2382 if (IS_ERR(out_skb)) {
2383 err = PTR_ERR(out_skb);
2384 goto out;
2385 }
2386 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2387 if (err < 0)
2388 goto out;
2389
2390 out_hdr = (struct sadb_msg *) out_skb->data;
2391 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2392 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
2393 out_hdr->sadb_msg_satype = 0;
2394 out_hdr->sadb_msg_errno = 0;
2395 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2396 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
2397 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
2398 err = 0;
2399
2400 out:
2401 return err;
2402 }
2403
2404 #ifdef CONFIG_NET_KEY_MIGRATE
2405 static int pfkey_sockaddr_pair_size(sa_family_t family)
2406 {
2407 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2408 }
2409
2410 static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2411 xfrm_address_t *saddr, xfrm_address_t *daddr,
2412 u16 *family)
2413 {
2414 int af, socklen;
2415
2416 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2417 return -EINVAL;
2418
2419 af = pfkey_sockaddr_extract(sa, saddr);
2420 if (!af)
2421 return -EINVAL;
2422
2423 socklen = pfkey_sockaddr_len(af);
2424 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2425 daddr) != af)
2426 return -EINVAL;
2427
2428 *family = af;
2429 return 0;
2430 }
2431
2432 static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2433 struct xfrm_migrate *m)
2434 {
2435 int err;
2436 struct sadb_x_ipsecrequest *rq2;
2437 int mode;
2438
2439 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2440 len < rq1->sadb_x_ipsecrequest_len)
2441 return -EINVAL;
2442
2443 /* old endoints */
2444 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2445 rq1->sadb_x_ipsecrequest_len,
2446 &m->old_saddr, &m->old_daddr,
2447 &m->old_family);
2448 if (err)
2449 return err;
2450
2451 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2452 len -= rq1->sadb_x_ipsecrequest_len;
2453
2454 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2455 len < rq2->sadb_x_ipsecrequest_len)
2456 return -EINVAL;
2457
2458 /* new endpoints */
2459 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2460 rq2->sadb_x_ipsecrequest_len,
2461 &m->new_saddr, &m->new_daddr,
2462 &m->new_family);
2463 if (err)
2464 return err;
2465
2466 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2467 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2468 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2469 return -EINVAL;
2470
2471 m->proto = rq1->sadb_x_ipsecrequest_proto;
2472 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2473 return -EINVAL;
2474 m->mode = mode;
2475 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2476
2477 return ((int)(rq1->sadb_x_ipsecrequest_len +
2478 rq2->sadb_x_ipsecrequest_len));
2479 }
2480
2481 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2482 struct sadb_msg *hdr, void **ext_hdrs)
2483 {
2484 int i, len, ret, err = -EINVAL;
2485 u8 dir;
2486 struct sadb_address *sa;
2487 struct sadb_x_kmaddress *kma;
2488 struct sadb_x_policy *pol;
2489 struct sadb_x_ipsecrequest *rq;
2490 struct xfrm_selector sel;
2491 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2492 struct xfrm_kmaddress k;
2493
2494 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2495 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2496 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2497 err = -EINVAL;
2498 goto out;
2499 }
2500
2501 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2502 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2503
2504 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2505 err = -EINVAL;
2506 goto out;
2507 }
2508
2509 if (kma) {
2510 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2511 k.reserved = kma->sadb_x_kmaddress_reserved;
2512 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2513 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2514 &k.local, &k.remote, &k.family);
2515 if (ret < 0) {
2516 err = ret;
2517 goto out;
2518 }
2519 }
2520
2521 dir = pol->sadb_x_policy_dir - 1;
2522 memset(&sel, 0, sizeof(sel));
2523
2524 /* set source address info of selector */
2525 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2526 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2527 sel.prefixlen_s = sa->sadb_address_prefixlen;
2528 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2529 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2530 if (sel.sport)
2531 sel.sport_mask = htons(0xffff);
2532
2533 /* set destination address info of selector */
2534 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2535 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2536 sel.prefixlen_d = sa->sadb_address_prefixlen;
2537 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2538 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2539 if (sel.dport)
2540 sel.dport_mask = htons(0xffff);
2541
2542 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2543
2544 /* extract ipsecrequests */
2545 i = 0;
2546 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2547
2548 while (len > 0 && i < XFRM_MAX_DEPTH) {
2549 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2550 if (ret < 0) {
2551 err = ret;
2552 goto out;
2553 } else {
2554 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2555 len -= ret;
2556 i++;
2557 }
2558 }
2559
2560 if (!i || len > 0) {
2561 err = -EINVAL;
2562 goto out;
2563 }
2564
2565 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2566 kma ? &k : NULL);
2567
2568 out:
2569 return err;
2570 }
2571 #else
2572 static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2573 struct sadb_msg *hdr, void **ext_hdrs)
2574 {
2575 return -ENOPROTOOPT;
2576 }
2577 #endif
2578
2579
2580 static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2581 {
2582 struct net *net = sock_net(sk);
2583 unsigned int dir;
2584 int err = 0, delete;
2585 struct sadb_x_policy *pol;
2586 struct xfrm_policy *xp;
2587 struct km_event c;
2588
2589 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2590 return -EINVAL;
2591
2592 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2593 if (dir >= XFRM_POLICY_MAX)
2594 return -EINVAL;
2595
2596 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2597 xp = xfrm_policy_byid(net, XFRM_POLICY_TYPE_MAIN, dir,
2598 pol->sadb_x_policy_id, delete, &err);
2599 if (xp == NULL)
2600 return -ENOENT;
2601
2602 if (delete) {
2603 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2604 audit_get_loginuid(current),
2605 audit_get_sessionid(current), 0);
2606
2607 if (err)
2608 goto out;
2609 c.seq = hdr->sadb_msg_seq;
2610 c.pid = hdr->sadb_msg_pid;
2611 c.data.byid = 1;
2612 c.event = XFRM_MSG_DELPOLICY;
2613 km_policy_notify(xp, dir, &c);
2614 } else {
2615 err = key_pol_get_resp(sk, xp, hdr, dir);
2616 }
2617
2618 out:
2619 xfrm_pol_put(xp);
2620 return err;
2621 }
2622
2623 static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2624 {
2625 struct pfkey_sock *pfk = ptr;
2626 struct sk_buff *out_skb;
2627 struct sadb_msg *out_hdr;
2628 int err;
2629
2630 if (!pfkey_can_dump(&pfk->sk))
2631 return -ENOBUFS;
2632
2633 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2634 if (IS_ERR(out_skb))
2635 return PTR_ERR(out_skb);
2636
2637 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2638 if (err < 0)
2639 return err;
2640
2641 out_hdr = (struct sadb_msg *) out_skb->data;
2642 out_hdr->sadb_msg_version = pfk->dump.msg_version;
2643 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2644 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2645 out_hdr->sadb_msg_errno = 0;
2646 out_hdr->sadb_msg_seq = count + 1;
2647 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
2648
2649 if (pfk->dump.skb)
2650 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2651 &pfk->sk, sock_net(&pfk->sk));
2652 pfk->dump.skb = out_skb;
2653
2654 return 0;
2655 }
2656
2657 static int pfkey_dump_sp(struct pfkey_sock *pfk)
2658 {
2659 struct net *net = sock_net(&pfk->sk);
2660 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2661 }
2662
2663 static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2664 {
2665 xfrm_policy_walk_done(&pfk->dump.u.policy);
2666 }
2667
2668 static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2669 {
2670 struct pfkey_sock *pfk = pfkey_sk(sk);
2671
2672 if (pfk->dump.dump != NULL)
2673 return -EBUSY;
2674
2675 pfk->dump.msg_version = hdr->sadb_msg_version;
2676 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2677 pfk->dump.dump = pfkey_dump_sp;
2678 pfk->dump.done = pfkey_dump_sp_done;
2679 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2680
2681 return pfkey_do_dump(pfk);
2682 }
2683
2684 static int key_notify_policy_flush(struct km_event *c)
2685 {
2686 struct sk_buff *skb_out;
2687 struct sadb_msg *hdr;
2688
2689 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
2690 if (!skb_out)
2691 return -ENOBUFS;
2692 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
2693 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2694 hdr->sadb_msg_seq = c->seq;
2695 hdr->sadb_msg_pid = c->pid;
2696 hdr->sadb_msg_version = PF_KEY_V2;
2697 hdr->sadb_msg_errno = (uint8_t) 0;
2698 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2699 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2700 return 0;
2701
2702 }
2703
2704 static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2705 {
2706 struct net *net = sock_net(sk);
2707 struct km_event c;
2708 struct xfrm_audit audit_info;
2709 int err;
2710
2711 audit_info.loginuid = audit_get_loginuid(current);
2712 audit_info.sessionid = audit_get_sessionid(current);
2713 audit_info.secid = 0;
2714 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2715 if (err)
2716 return err;
2717 c.data.type = XFRM_POLICY_TYPE_MAIN;
2718 c.event = XFRM_MSG_FLUSHPOLICY;
2719 c.pid = hdr->sadb_msg_pid;
2720 c.seq = hdr->sadb_msg_seq;
2721 c.net = net;
2722 km_policy_notify(NULL, 0, &c);
2723
2724 return 0;
2725 }
2726
2727 typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2728 struct sadb_msg *hdr, void **ext_hdrs);
2729 static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2730 [SADB_RESERVED] = pfkey_reserved,
2731 [SADB_GETSPI] = pfkey_getspi,
2732 [SADB_UPDATE] = pfkey_add,
2733 [SADB_ADD] = pfkey_add,
2734 [SADB_DELETE] = pfkey_delete,
2735 [SADB_GET] = pfkey_get,
2736 [SADB_ACQUIRE] = pfkey_acquire,
2737 [SADB_REGISTER] = pfkey_register,
2738 [SADB_EXPIRE] = NULL,
2739 [SADB_FLUSH] = pfkey_flush,
2740 [SADB_DUMP] = pfkey_dump,
2741 [SADB_X_PROMISC] = pfkey_promisc,
2742 [SADB_X_PCHANGE] = NULL,
2743 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2744 [SADB_X_SPDADD] = pfkey_spdadd,
2745 [SADB_X_SPDDELETE] = pfkey_spddelete,
2746 [SADB_X_SPDGET] = pfkey_spdget,
2747 [SADB_X_SPDACQUIRE] = NULL,
2748 [SADB_X_SPDDUMP] = pfkey_spddump,
2749 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2750 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2751 [SADB_X_SPDDELETE2] = pfkey_spdget,
2752 [SADB_X_MIGRATE] = pfkey_migrate,
2753 };
2754
2755 static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2756 {
2757 void *ext_hdrs[SADB_EXT_MAX];
2758 int err;
2759
2760 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2761 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
2762
2763 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2764 err = parse_exthdrs(skb, hdr, ext_hdrs);
2765 if (!err) {
2766 err = -EOPNOTSUPP;
2767 if (pfkey_funcs[hdr->sadb_msg_type])
2768 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2769 }
2770 return err;
2771 }
2772
2773 static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2774 {
2775 struct sadb_msg *hdr = NULL;
2776
2777 if (skb->len < sizeof(*hdr)) {
2778 *errp = -EMSGSIZE;
2779 } else {
2780 hdr = (struct sadb_msg *) skb->data;
2781 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2782 hdr->sadb_msg_reserved != 0 ||
2783 (hdr->sadb_msg_type <= SADB_RESERVED ||
2784 hdr->sadb_msg_type > SADB_MAX)) {
2785 hdr = NULL;
2786 *errp = -EINVAL;
2787 } else if (hdr->sadb_msg_len != (skb->len /
2788 sizeof(uint64_t)) ||
2789 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2790 sizeof(uint64_t))) {
2791 hdr = NULL;
2792 *errp = -EMSGSIZE;
2793 } else {
2794 *errp = 0;
2795 }
2796 }
2797 return hdr;
2798 }
2799
2800 static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2801 {
2802 unsigned int id = d->desc.sadb_alg_id;
2803
2804 if (id >= sizeof(t->aalgos) * 8)
2805 return 0;
2806
2807 return (t->aalgos >> id) & 1;
2808 }
2809
2810 static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2811 {
2812 unsigned int id = d->desc.sadb_alg_id;
2813
2814 if (id >= sizeof(t->ealgos) * 8)
2815 return 0;
2816
2817 return (t->ealgos >> id) & 1;
2818 }
2819
2820 static int count_ah_combs(struct xfrm_tmpl *t)
2821 {
2822 int i, sz = 0;
2823
2824 for (i = 0; ; i++) {
2825 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2826 if (!aalg)
2827 break;
2828 if (aalg_tmpl_set(t, aalg) && aalg->available)
2829 sz += sizeof(struct sadb_comb);
2830 }
2831 return sz + sizeof(struct sadb_prop);
2832 }
2833
2834 static int count_esp_combs(struct xfrm_tmpl *t)
2835 {
2836 int i, k, sz = 0;
2837
2838 for (i = 0; ; i++) {
2839 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2840 if (!ealg)
2841 break;
2842
2843 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2844 continue;
2845
2846 for (k = 1; ; k++) {
2847 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2848 if (!aalg)
2849 break;
2850
2851 if (aalg_tmpl_set(t, aalg) && aalg->available)
2852 sz += sizeof(struct sadb_comb);
2853 }
2854 }
2855 return sz + sizeof(struct sadb_prop);
2856 }
2857
2858 static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2859 {
2860 struct sadb_prop *p;
2861 int i;
2862
2863 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2864 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2865 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2866 p->sadb_prop_replay = 32;
2867 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2868
2869 for (i = 0; ; i++) {
2870 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2871 if (!aalg)
2872 break;
2873
2874 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2875 struct sadb_comb *c;
2876 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2877 memset(c, 0, sizeof(*c));
2878 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2879 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2880 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2881 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2882 c->sadb_comb_hard_addtime = 24*60*60;
2883 c->sadb_comb_soft_addtime = 20*60*60;
2884 c->sadb_comb_hard_usetime = 8*60*60;
2885 c->sadb_comb_soft_usetime = 7*60*60;
2886 }
2887 }
2888 }
2889
2890 static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2891 {
2892 struct sadb_prop *p;
2893 int i, k;
2894
2895 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2896 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2897 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2898 p->sadb_prop_replay = 32;
2899 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2900
2901 for (i=0; ; i++) {
2902 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2903 if (!ealg)
2904 break;
2905
2906 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2907 continue;
2908
2909 for (k = 1; ; k++) {
2910 struct sadb_comb *c;
2911 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2912 if (!aalg)
2913 break;
2914 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2915 continue;
2916 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2917 memset(c, 0, sizeof(*c));
2918 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2919 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2920 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2921 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2922 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2923 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2924 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2925 c->sadb_comb_hard_addtime = 24*60*60;
2926 c->sadb_comb_soft_addtime = 20*60*60;
2927 c->sadb_comb_hard_usetime = 8*60*60;
2928 c->sadb_comb_soft_usetime = 7*60*60;
2929 }
2930 }
2931 }
2932
2933 static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2934 {
2935 return 0;
2936 }
2937
2938 static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
2939 {
2940 struct sk_buff *out_skb;
2941 struct sadb_msg *out_hdr;
2942 int hard;
2943 int hsc;
2944
2945 hard = c->data.hard;
2946 if (hard)
2947 hsc = 2;
2948 else
2949 hsc = 1;
2950
2951 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
2952 if (IS_ERR(out_skb))
2953 return PTR_ERR(out_skb);
2954
2955 out_hdr = (struct sadb_msg *) out_skb->data;
2956 out_hdr->sadb_msg_version = PF_KEY_V2;
2957 out_hdr->sadb_msg_type = SADB_EXPIRE;
2958 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2959 out_hdr->sadb_msg_errno = 0;
2960 out_hdr->sadb_msg_reserved = 0;
2961 out_hdr->sadb_msg_seq = 0;
2962 out_hdr->sadb_msg_pid = 0;
2963
2964 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
2965 return 0;
2966 }
2967
2968 static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2969 {
2970 struct net *net = x ? xs_net(x) : c->net;
2971 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
2972
2973 if (atomic_read(&net_pfkey->socks_nr) == 0)
2974 return 0;
2975
2976 switch (c->event) {
2977 case XFRM_MSG_EXPIRE:
2978 return key_notify_sa_expire(x, c);
2979 case XFRM_MSG_DELSA:
2980 case XFRM_MSG_NEWSA:
2981 case XFRM_MSG_UPDSA:
2982 return key_notify_sa(x, c);
2983 case XFRM_MSG_FLUSHSA:
2984 return key_notify_sa_flush(c);
2985 case XFRM_MSG_NEWAE: /* not yet supported */
2986 break;
2987 default:
2988 printk("pfkey: Unknown SA event %d\n", c->event);
2989 break;
2990 }
2991
2992 return 0;
2993 }
2994
2995 static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2996 {
2997 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2998 return 0;
2999
3000 switch (c->event) {
3001 case XFRM_MSG_POLEXPIRE:
3002 return key_notify_policy_expire(xp, c);
3003 case XFRM_MSG_DELPOLICY:
3004 case XFRM_MSG_NEWPOLICY:
3005 case XFRM_MSG_UPDPOLICY:
3006 return key_notify_policy(xp, dir, c);
3007 case XFRM_MSG_FLUSHPOLICY:
3008 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3009 break;
3010 return key_notify_policy_flush(c);
3011 default:
3012 printk("pfkey: Unknown policy event %d\n", c->event);
3013 break;
3014 }
3015
3016 return 0;
3017 }
3018
3019 static u32 get_acqseq(void)
3020 {
3021 u32 res;
3022 static u32 acqseq;
3023 static DEFINE_SPINLOCK(acqseq_lock);
3024
3025 spin_lock_bh(&acqseq_lock);
3026 res = (++acqseq ? : ++acqseq);
3027 spin_unlock_bh(&acqseq_lock);
3028 return res;
3029 }
3030
3031 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3032 {
3033 struct sk_buff *skb;
3034 struct sadb_msg *hdr;
3035 struct sadb_address *addr;
3036 struct sadb_x_policy *pol;
3037 int sockaddr_size;
3038 int size;
3039 struct sadb_x_sec_ctx *sec_ctx;
3040 struct xfrm_sec_ctx *xfrm_ctx;
3041 int ctx_size = 0;
3042
3043 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3044 if (!sockaddr_size)
3045 return -EINVAL;
3046
3047 size = sizeof(struct sadb_msg) +
3048 (sizeof(struct sadb_address) * 2) +
3049 (sockaddr_size * 2) +
3050 sizeof(struct sadb_x_policy);
3051
3052 if (x->id.proto == IPPROTO_AH)
3053 size += count_ah_combs(t);
3054 else if (x->id.proto == IPPROTO_ESP)
3055 size += count_esp_combs(t);
3056
3057 if ((xfrm_ctx = x->security)) {
3058 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3059 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3060 }
3061
3062 skb = alloc_skb(size + 16, GFP_ATOMIC);
3063 if (skb == NULL)
3064 return -ENOMEM;
3065
3066 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3067 hdr->sadb_msg_version = PF_KEY_V2;
3068 hdr->sadb_msg_type = SADB_ACQUIRE;
3069 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3070 hdr->sadb_msg_len = size / sizeof(uint64_t);
3071 hdr->sadb_msg_errno = 0;
3072 hdr->sadb_msg_reserved = 0;
3073 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3074 hdr->sadb_msg_pid = 0;
3075
3076 /* src address */
3077 addr = (struct sadb_address*) skb_put(skb,
3078 sizeof(struct sadb_address)+sockaddr_size);
3079 addr->sadb_address_len =
3080 (sizeof(struct sadb_address)+sockaddr_size)/
3081 sizeof(uint64_t);
3082 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3083 addr->sadb_address_proto = 0;
3084 addr->sadb_address_reserved = 0;
3085 addr->sadb_address_prefixlen =
3086 pfkey_sockaddr_fill(&x->props.saddr, 0,
3087 (struct sockaddr *) (addr + 1),
3088 x->props.family);
3089 if (!addr->sadb_address_prefixlen)
3090 BUG();
3091
3092 /* dst address */
3093 addr = (struct sadb_address*) skb_put(skb,
3094 sizeof(struct sadb_address)+sockaddr_size);
3095 addr->sadb_address_len =
3096 (sizeof(struct sadb_address)+sockaddr_size)/
3097 sizeof(uint64_t);
3098 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3099 addr->sadb_address_proto = 0;
3100 addr->sadb_address_reserved = 0;
3101 addr->sadb_address_prefixlen =
3102 pfkey_sockaddr_fill(&x->id.daddr, 0,
3103 (struct sockaddr *) (addr + 1),
3104 x->props.family);
3105 if (!addr->sadb_address_prefixlen)
3106 BUG();
3107
3108 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3109 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3110 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3111 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3112 pol->sadb_x_policy_dir = dir+1;
3113 pol->sadb_x_policy_id = xp->index;
3114
3115 /* Set sadb_comb's. */
3116 if (x->id.proto == IPPROTO_AH)
3117 dump_ah_combs(skb, t);
3118 else if (x->id.proto == IPPROTO_ESP)
3119 dump_esp_combs(skb, t);
3120
3121 /* security context */
3122 if (xfrm_ctx) {
3123 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3124 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3125 sec_ctx->sadb_x_sec_len =
3126 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3127 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3128 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3129 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3130 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3131 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3132 xfrm_ctx->ctx_len);
3133 }
3134
3135 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3136 }
3137
3138 static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3139 u8 *data, int len, int *dir)
3140 {
3141 struct net *net = sock_net(sk);
3142 struct xfrm_policy *xp;
3143 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3144 struct sadb_x_sec_ctx *sec_ctx;
3145
3146 switch (sk->sk_family) {
3147 case AF_INET:
3148 if (opt != IP_IPSEC_POLICY) {
3149 *dir = -EOPNOTSUPP;
3150 return NULL;
3151 }
3152 break;
3153 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3154 case AF_INET6:
3155 if (opt != IPV6_IPSEC_POLICY) {
3156 *dir = -EOPNOTSUPP;
3157 return NULL;
3158 }
3159 break;
3160 #endif
3161 default:
3162 *dir = -EINVAL;
3163 return NULL;
3164 }
3165
3166 *dir = -EINVAL;
3167
3168 if (len < sizeof(struct sadb_x_policy) ||
3169 pol->sadb_x_policy_len*8 > len ||
3170 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3171 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3172 return NULL;
3173
3174 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3175 if (xp == NULL) {
3176 *dir = -ENOBUFS;
3177 return NULL;
3178 }
3179
3180 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3181 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3182
3183 xp->lft.soft_byte_limit = XFRM_INF;
3184 xp->lft.hard_byte_limit = XFRM_INF;
3185 xp->lft.soft_packet_limit = XFRM_INF;
3186 xp->lft.hard_packet_limit = XFRM_INF;
3187 xp->family = sk->sk_family;
3188
3189 xp->xfrm_nr = 0;
3190 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3191 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3192 goto out;
3193
3194 /* security context too */
3195 if (len >= (pol->sadb_x_policy_len*8 +
3196 sizeof(struct sadb_x_sec_ctx))) {
3197 char *p = (char *)pol;
3198 struct xfrm_user_sec_ctx *uctx;
3199
3200 p += pol->sadb_x_policy_len*8;
3201 sec_ctx = (struct sadb_x_sec_ctx *)p;
3202 if (len < pol->sadb_x_policy_len*8 +
3203 sec_ctx->sadb_x_sec_len) {
3204 *dir = -EINVAL;
3205 goto out;
3206 }
3207 if ((*dir = verify_sec_ctx_len(p)))
3208 goto out;
3209 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3210 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
3211 kfree(uctx);
3212
3213 if (*dir)
3214 goto out;
3215 }
3216
3217 *dir = pol->sadb_x_policy_dir-1;
3218 return xp;
3219
3220 out:
3221 xp->walk.dead = 1;
3222 xfrm_policy_destroy(xp);
3223 return NULL;
3224 }
3225
3226 static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
3227 {
3228 struct sk_buff *skb;
3229 struct sadb_msg *hdr;
3230 struct sadb_sa *sa;
3231 struct sadb_address *addr;
3232 struct sadb_x_nat_t_port *n_port;
3233 int sockaddr_size;
3234 int size;
3235 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3236 struct xfrm_encap_tmpl *natt = NULL;
3237
3238 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3239 if (!sockaddr_size)
3240 return -EINVAL;
3241
3242 if (!satype)
3243 return -EINVAL;
3244
3245 if (!x->encap)
3246 return -EINVAL;
3247
3248 natt = x->encap;
3249
3250 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3251 *
3252 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3253 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3254 */
3255
3256 size = sizeof(struct sadb_msg) +
3257 sizeof(struct sadb_sa) +
3258 (sizeof(struct sadb_address) * 2) +
3259 (sockaddr_size * 2) +
3260 (sizeof(struct sadb_x_nat_t_port) * 2);
3261
3262 skb = alloc_skb(size + 16, GFP_ATOMIC);
3263 if (skb == NULL)
3264 return -ENOMEM;
3265
3266 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3267 hdr->sadb_msg_version = PF_KEY_V2;
3268 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3269 hdr->sadb_msg_satype = satype;
3270 hdr->sadb_msg_len = size / sizeof(uint64_t);
3271 hdr->sadb_msg_errno = 0;
3272 hdr->sadb_msg_reserved = 0;
3273 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3274 hdr->sadb_msg_pid = 0;
3275
3276 /* SA */
3277 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3278 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3279 sa->sadb_sa_exttype = SADB_EXT_SA;
3280 sa->sadb_sa_spi = x->id.spi;
3281 sa->sadb_sa_replay = 0;
3282 sa->sadb_sa_state = 0;
3283 sa->sadb_sa_auth = 0;
3284 sa->sadb_sa_encrypt = 0;
3285 sa->sadb_sa_flags = 0;
3286
3287 /* ADDRESS_SRC (old addr) */
3288 addr = (struct sadb_address*)
3289 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3290 addr->sadb_address_len =
3291 (sizeof(struct sadb_address)+sockaddr_size)/
3292 sizeof(uint64_t);
3293 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3294 addr->sadb_address_proto = 0;
3295 addr->sadb_address_reserved = 0;
3296 addr->sadb_address_prefixlen =
3297 pfkey_sockaddr_fill(&x->props.saddr, 0,
3298 (struct sockaddr *) (addr + 1),
3299 x->props.family);
3300 if (!addr->sadb_address_prefixlen)
3301 BUG();
3302
3303 /* NAT_T_SPORT (old port) */
3304 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3305 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3306 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3307 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3308 n_port->sadb_x_nat_t_port_reserved = 0;
3309
3310 /* ADDRESS_DST (new addr) */
3311 addr = (struct sadb_address*)
3312 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
3313 addr->sadb_address_len =
3314 (sizeof(struct sadb_address)+sockaddr_size)/
3315 sizeof(uint64_t);
3316 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3317 addr->sadb_address_proto = 0;
3318 addr->sadb_address_reserved = 0;
3319 addr->sadb_address_prefixlen =
3320 pfkey_sockaddr_fill(ipaddr, 0,
3321 (struct sockaddr *) (addr + 1),
3322 x->props.family);
3323 if (!addr->sadb_address_prefixlen)
3324 BUG();
3325
3326 /* NAT_T_DPORT (new port) */
3327 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3328 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3329 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3330 n_port->sadb_x_nat_t_port_port = sport;
3331 n_port->sadb_x_nat_t_port_reserved = 0;
3332
3333 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
3334 }
3335
3336 #ifdef CONFIG_NET_KEY_MIGRATE
3337 static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3338 struct xfrm_selector *sel)
3339 {
3340 struct sadb_address *addr;
3341 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3342 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3343 addr->sadb_address_exttype = type;
3344 addr->sadb_address_proto = sel->proto;
3345 addr->sadb_address_reserved = 0;
3346
3347 switch (type) {
3348 case SADB_EXT_ADDRESS_SRC:
3349 addr->sadb_address_prefixlen = sel->prefixlen_s;
3350 pfkey_sockaddr_fill(&sel->saddr, 0,
3351 (struct sockaddr *)(addr + 1),
3352 sel->family);
3353 break;
3354 case SADB_EXT_ADDRESS_DST:
3355 addr->sadb_address_prefixlen = sel->prefixlen_d;
3356 pfkey_sockaddr_fill(&sel->daddr, 0,
3357 (struct sockaddr *)(addr + 1),
3358 sel->family);
3359 break;
3360 default:
3361 return -EINVAL;
3362 }
3363
3364 return 0;
3365 }
3366
3367
3368 static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k)
3369 {
3370 struct sadb_x_kmaddress *kma;
3371 u8 *sa;
3372 int family = k->family;
3373 int socklen = pfkey_sockaddr_len(family);
3374 int size_req;
3375
3376 size_req = (sizeof(struct sadb_x_kmaddress) +
3377 pfkey_sockaddr_pair_size(family));
3378
3379 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3380 memset(kma, 0, size_req);
3381 kma->sadb_x_kmaddress_len = size_req / 8;
3382 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3383 kma->sadb_x_kmaddress_reserved = k->reserved;
3384
3385 sa = (u8 *)(kma + 1);
3386 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3387 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3388 return -EINVAL;
3389
3390 return 0;
3391 }
3392
3393 static int set_ipsecrequest(struct sk_buff *skb,
3394 uint8_t proto, uint8_t mode, int level,
3395 uint32_t reqid, uint8_t family,
3396 xfrm_address_t *src, xfrm_address_t *dst)
3397 {
3398 struct sadb_x_ipsecrequest *rq;
3399 u8 *sa;
3400 int socklen = pfkey_sockaddr_len(family);
3401 int size_req;
3402
3403 size_req = sizeof(struct sadb_x_ipsecrequest) +
3404 pfkey_sockaddr_pair_size(family);
3405
3406 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3407 memset(rq, 0, size_req);
3408 rq->sadb_x_ipsecrequest_len = size_req;
3409 rq->sadb_x_ipsecrequest_proto = proto;
3410 rq->sadb_x_ipsecrequest_mode = mode;
3411 rq->sadb_x_ipsecrequest_level = level;
3412 rq->sadb_x_ipsecrequest_reqid = reqid;
3413
3414 sa = (u8 *) (rq + 1);
3415 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3416 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3417 return -EINVAL;
3418
3419 return 0;
3420 }
3421 #endif
3422
3423 #ifdef CONFIG_NET_KEY_MIGRATE
3424 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3425 struct xfrm_migrate *m, int num_bundles,
3426 struct xfrm_kmaddress *k)
3427 {
3428 int i;
3429 int sasize_sel;
3430 int size = 0;
3431 int size_pol = 0;
3432 struct sk_buff *skb;
3433 struct sadb_msg *hdr;
3434 struct sadb_x_policy *pol;
3435 struct xfrm_migrate *mp;
3436
3437 if (type != XFRM_POLICY_TYPE_MAIN)
3438 return 0;
3439
3440 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3441 return -EINVAL;
3442
3443 if (k != NULL) {
3444 /* addresses for KM */
3445 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3446 pfkey_sockaddr_pair_size(k->family));
3447 }
3448
3449 /* selector */
3450 sasize_sel = pfkey_sockaddr_size(sel->family);
3451 if (!sasize_sel)
3452 return -EINVAL;
3453 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3454
3455 /* policy info */
3456 size_pol += sizeof(struct sadb_x_policy);
3457
3458 /* ipsecrequests */
3459 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3460 /* old locator pair */
3461 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3462 pfkey_sockaddr_pair_size(mp->old_family);
3463 /* new locator pair */
3464 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3465 pfkey_sockaddr_pair_size(mp->new_family);
3466 }
3467
3468 size += sizeof(struct sadb_msg) + size_pol;
3469
3470 /* alloc buffer */
3471 skb = alloc_skb(size, GFP_ATOMIC);
3472 if (skb == NULL)
3473 return -ENOMEM;
3474
3475 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3476 hdr->sadb_msg_version = PF_KEY_V2;
3477 hdr->sadb_msg_type = SADB_X_MIGRATE;
3478 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3479 hdr->sadb_msg_len = size / 8;
3480 hdr->sadb_msg_errno = 0;
3481 hdr->sadb_msg_reserved = 0;
3482 hdr->sadb_msg_seq = 0;
3483 hdr->sadb_msg_pid = 0;
3484
3485 /* Addresses to be used by KM for negotiation, if ext is available */
3486 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3487 return -EINVAL;
3488
3489 /* selector src */
3490 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3491
3492 /* selector dst */
3493 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3494
3495 /* policy information */
3496 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3497 pol->sadb_x_policy_len = size_pol / 8;
3498 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3499 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3500 pol->sadb_x_policy_dir = dir + 1;
3501 pol->sadb_x_policy_id = 0;
3502 pol->sadb_x_policy_priority = 0;
3503
3504 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3505 /* old ipsecrequest */
3506 int mode = pfkey_mode_from_xfrm(mp->mode);
3507 if (mode < 0)
3508 goto err;
3509 if (set_ipsecrequest(skb, mp->proto, mode,
3510 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3511 mp->reqid, mp->old_family,
3512 &mp->old_saddr, &mp->old_daddr) < 0)
3513 goto err;
3514
3515 /* new ipsecrequest */
3516 if (set_ipsecrequest(skb, mp->proto, mode,
3517 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3518 mp->reqid, mp->new_family,
3519 &mp->new_saddr, &mp->new_daddr) < 0)
3520 goto err;
3521 }
3522
3523 /* broadcast migrate message to sockets */
3524 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3525
3526 return 0;
3527
3528 err:
3529 kfree_skb(skb);
3530 return -EINVAL;
3531 }
3532 #else
3533 static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3534 struct xfrm_migrate *m, int num_bundles,
3535 struct xfrm_kmaddress *k)
3536 {
3537 return -ENOPROTOOPT;
3538 }
3539 #endif
3540
3541 static int pfkey_sendmsg(struct kiocb *kiocb,
3542 struct socket *sock, struct msghdr *msg, size_t len)
3543 {
3544 struct sock *sk = sock->sk;
3545 struct sk_buff *skb = NULL;
3546 struct sadb_msg *hdr = NULL;
3547 int err;
3548
3549 err = -EOPNOTSUPP;
3550 if (msg->msg_flags & MSG_OOB)
3551 goto out;
3552
3553 err = -EMSGSIZE;
3554 if ((unsigned)len > sk->sk_sndbuf - 32)
3555 goto out;
3556
3557 err = -ENOBUFS;
3558 skb = alloc_skb(len, GFP_KERNEL);
3559 if (skb == NULL)
3560 goto out;
3561
3562 err = -EFAULT;
3563 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3564 goto out;
3565
3566 hdr = pfkey_get_base_msg(skb, &err);
3567 if (!hdr)
3568 goto out;
3569
3570 mutex_lock(&xfrm_cfg_mutex);
3571 err = pfkey_process(sk, skb, hdr);
3572 mutex_unlock(&xfrm_cfg_mutex);
3573
3574 out:
3575 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3576 err = 0;
3577 kfree_skb(skb);
3578
3579 return err ? : len;
3580 }
3581
3582 static int pfkey_recvmsg(struct kiocb *kiocb,
3583 struct socket *sock, struct msghdr *msg, size_t len,
3584 int flags)
3585 {
3586 struct sock *sk = sock->sk;
3587 struct pfkey_sock *pfk = pfkey_sk(sk);
3588 struct sk_buff *skb;
3589 int copied, err;
3590
3591 err = -EINVAL;
3592 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3593 goto out;
3594
3595 msg->msg_namelen = 0;
3596 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3597 if (skb == NULL)
3598 goto out;
3599
3600 copied = skb->len;
3601 if (copied > len) {
3602 msg->msg_flags |= MSG_TRUNC;
3603 copied = len;
3604 }
3605
3606 skb_reset_transport_header(skb);
3607 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3608 if (err)
3609 goto out_free;
3610
3611 sock_recv_ts_and_drops(msg, sk, skb);
3612
3613 err = (flags & MSG_TRUNC) ? skb->len : copied;
3614
3615 if (pfk->dump.dump != NULL &&
3616 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3617 pfkey_do_dump(pfk);
3618
3619 out_free:
3620 skb_free_datagram(sk, skb);
3621 out:
3622 return err;
3623 }
3624
3625 static const struct proto_ops pfkey_ops = {
3626 .family = PF_KEY,
3627 .owner = THIS_MODULE,
3628 /* Operations that make no sense on pfkey sockets. */
3629 .bind = sock_no_bind,
3630 .connect = sock_no_connect,
3631 .socketpair = sock_no_socketpair,
3632 .accept = sock_no_accept,
3633 .getname = sock_no_getname,
3634 .ioctl = sock_no_ioctl,
3635 .listen = sock_no_listen,
3636 .shutdown = sock_no_shutdown,
3637 .setsockopt = sock_no_setsockopt,
3638 .getsockopt = sock_no_getsockopt,
3639 .mmap = sock_no_mmap,
3640 .sendpage = sock_no_sendpage,
3641
3642 /* Now the operations that really occur. */
3643 .release = pfkey_release,
3644 .poll = datagram_poll,
3645 .sendmsg = pfkey_sendmsg,
3646 .recvmsg = pfkey_recvmsg,
3647 };
3648
3649 static const struct net_proto_family pfkey_family_ops = {
3650 .family = PF_KEY,
3651 .create = pfkey_create,
3652 .owner = THIS_MODULE,
3653 };
3654
3655 #ifdef CONFIG_PROC_FS
3656 static int pfkey_seq_show(struct seq_file *f, void *v)
3657 {
3658 struct sock *s;
3659
3660 s = (struct sock *)v;
3661 if (v == SEQ_START_TOKEN)
3662 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3663 else
3664 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
3665 s,
3666 atomic_read(&s->sk_refcnt),
3667 sk_rmem_alloc_get(s),
3668 sk_wmem_alloc_get(s),
3669 sock_i_uid(s),
3670 sock_i_ino(s)
3671 );
3672 return 0;
3673 }
3674
3675 static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3676 {
3677 struct net *net = seq_file_net(f);
3678 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3679 struct sock *s;
3680 struct hlist_node *node;
3681 loff_t pos = *ppos;
3682
3683 read_lock(&pfkey_table_lock);
3684 if (pos == 0)
3685 return SEQ_START_TOKEN;
3686
3687 sk_for_each(s, node, &net_pfkey->table)
3688 if (pos-- == 1)
3689 return s;
3690
3691 return NULL;
3692 }
3693
3694 static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3695 {
3696 struct net *net = seq_file_net(f);
3697 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3698
3699 ++*ppos;
3700 return (v == SEQ_START_TOKEN) ?
3701 sk_head(&net_pfkey->table) :
3702 sk_next((struct sock *)v);
3703 }
3704
3705 static void pfkey_seq_stop(struct seq_file *f, void *v)
3706 {
3707 read_unlock(&pfkey_table_lock);
3708 }
3709
3710 static const struct seq_operations pfkey_seq_ops = {
3711 .start = pfkey_seq_start,
3712 .next = pfkey_seq_next,
3713 .stop = pfkey_seq_stop,
3714 .show = pfkey_seq_show,
3715 };
3716
3717 static int pfkey_seq_open(struct inode *inode, struct file *file)
3718 {
3719 return seq_open_net(inode, file, &pfkey_seq_ops,
3720 sizeof(struct seq_net_private));
3721 }
3722
3723 static const struct file_operations pfkey_proc_ops = {
3724 .open = pfkey_seq_open,
3725 .read = seq_read,
3726 .llseek = seq_lseek,
3727 .release = seq_release_net,
3728 };
3729
3730 static int __net_init pfkey_init_proc(struct net *net)
3731 {
3732 struct proc_dir_entry *e;
3733
3734 e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3735 if (e == NULL)
3736 return -ENOMEM;
3737
3738 return 0;
3739 }
3740
3741 static void pfkey_exit_proc(struct net *net)
3742 {
3743 proc_net_remove(net, "pfkey");
3744 }
3745 #else
3746 static int __net_init pfkey_init_proc(struct net *net)
3747 {
3748 return 0;
3749 }
3750
3751 static void pfkey_exit_proc(struct net *net)
3752 {
3753 }
3754 #endif
3755
3756 static struct xfrm_mgr pfkeyv2_mgr =
3757 {
3758 .id = "pfkeyv2",
3759 .notify = pfkey_send_notify,
3760 .acquire = pfkey_send_acquire,
3761 .compile_policy = pfkey_compile_policy,
3762 .new_mapping = pfkey_send_new_mapping,
3763 .notify_policy = pfkey_send_policy_notify,
3764 .migrate = pfkey_send_migrate,
3765 };
3766
3767 static int __net_init pfkey_net_init(struct net *net)
3768 {
3769 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3770 int rv;
3771
3772 INIT_HLIST_HEAD(&net_pfkey->table);
3773 atomic_set(&net_pfkey->socks_nr, 0);
3774
3775 rv = pfkey_init_proc(net);
3776
3777 return rv;
3778 }
3779
3780 static void __net_exit pfkey_net_exit(struct net *net)
3781 {
3782 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3783
3784 pfkey_exit_proc(net);
3785 BUG_ON(!hlist_empty(&net_pfkey->table));
3786 }
3787
3788 static struct pernet_operations pfkey_net_ops = {
3789 .init = pfkey_net_init,
3790 .exit = pfkey_net_exit,
3791 .id = &pfkey_net_id,
3792 .size = sizeof(struct netns_pfkey),
3793 };
3794
3795 static void __exit ipsec_pfkey_exit(void)
3796 {
3797 unregister_pernet_subsys(&pfkey_net_ops);
3798 xfrm_unregister_km(&pfkeyv2_mgr);
3799 sock_unregister(PF_KEY);
3800 proto_unregister(&key_proto);
3801 }
3802
3803 static int __init ipsec_pfkey_init(void)
3804 {
3805 int err = proto_register(&key_proto, 0);
3806
3807 if (err != 0)
3808 goto out;
3809
3810 err = sock_register(&pfkey_family_ops);
3811 if (err != 0)
3812 goto out_unregister_key_proto;
3813 err = xfrm_register_km(&pfkeyv2_mgr);
3814 if (err != 0)
3815 goto out_sock_unregister;
3816 err = register_pernet_subsys(&pfkey_net_ops);
3817 if (err != 0)
3818 goto out_xfrm_unregister_km;
3819 out:
3820 return err;
3821 out_xfrm_unregister_km:
3822 xfrm_unregister_km(&pfkeyv2_mgr);
3823 out_sock_unregister:
3824 sock_unregister(PF_KEY);
3825 out_unregister_key_proto:
3826 proto_unregister(&key_proto);
3827 goto out;
3828 }
3829
3830 module_init(ipsec_pfkey_init);
3831 module_exit(ipsec_pfkey_exit);
3832 MODULE_LICENSE("GPL");
3833 MODULE_ALIAS_NETPROTO(PF_KEY);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree