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[TIPC]: Convert tsock->sem in a mutex
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / key / af_key.c
CommitLineData
1da177e4
LT		 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
4fc268d2 17#include <linux/capability.h>
1da177e4
LT		 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>
457c4cbc 29#include <net/net_namespace.h>
1da177e4
LT		 30#include <net/xfrm.h>
31
32#include <net/sock.h>
33
34#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
35#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
36
37
38/* List of all pfkey sockets. */
39static HLIST_HEAD(pfkey_table);
40static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
41static DEFINE_RWLOCK(pfkey_table_lock);
42static atomic_t pfkey_table_users = ATOMIC_INIT(0);
43
44static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
45
46struct pfkey_sock {
47 /* struct sock must be the first member of struct pfkey_sock */
48 struct sock sk;
49 int registered;
50 int promisc;
51};
52
53static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
54{
55 return (struct pfkey_sock *)sk;
56}
57
58static void pfkey_sock_destruct(struct sock *sk)
59{
60 skb_queue_purge(&sk->sk_receive_queue);
61
62 if (!sock_flag(sk, SOCK_DEAD)) {
63 printk("Attempt to release alive pfkey socket: %p\n", sk);
64 return;
65 }
66
67 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
68 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
69
70 atomic_dec(&pfkey_socks_nr);
71}
72
73static void pfkey_table_grab(void)
74{
75 write_lock_bh(&pfkey_table_lock);
76
77 if (atomic_read(&pfkey_table_users)) {
78 DECLARE_WAITQUEUE(wait, current);
79
80 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
81 for(;;) {
82 set_current_state(TASK_UNINTERRUPTIBLE);
83 if (atomic_read(&pfkey_table_users) == 0)
84 break;
85 write_unlock_bh(&pfkey_table_lock);
86 schedule();
87 write_lock_bh(&pfkey_table_lock);
88 }
89
90 __set_current_state(TASK_RUNNING);
91 remove_wait_queue(&pfkey_table_wait, &wait);
92 }
93}
94
95static __inline__ void pfkey_table_ungrab(void)
96{
97 write_unlock_bh(&pfkey_table_lock);
98 wake_up(&pfkey_table_wait);
99}
100
101static __inline__ void pfkey_lock_table(void)
102{
103 /* read_lock() synchronizes us to pfkey_table_grab */
104
105 read_lock(&pfkey_table_lock);
106 atomic_inc(&pfkey_table_users);
107 read_unlock(&pfkey_table_lock);
108}
109
110static __inline__ void pfkey_unlock_table(void)
111{
112 if (atomic_dec_and_test(&pfkey_table_users))
113 wake_up(&pfkey_table_wait);
114}
115
116
90ddc4f0 117static const struct proto_ops pfkey_ops;
1da177e4
LT		 118
119static void pfkey_insert(struct sock *sk)
120{
121 pfkey_table_grab();
122 sk_add_node(sk, &pfkey_table);
123 pfkey_table_ungrab();
124}
125
126static void pfkey_remove(struct sock *sk)
127{
128 pfkey_table_grab();
129 sk_del_node_init(sk);
130 pfkey_table_ungrab();
131}
132
133static struct proto key_proto = {
134 .name = "KEY",
135 .owner = THIS_MODULE,
136 .obj_size = sizeof(struct pfkey_sock),
137};
138
1b8d7ae4 139static int pfkey_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 140{
141 struct sock *sk;
142 int err;
143
1b8d7ae4
EB		 144 if (net != &init_net)
145 return -EAFNOSUPPORT;
146
1da177e4
LT		 147 if (!capable(CAP_NET_ADMIN))
148 return -EPERM;
149 if (sock->type != SOCK_RAW)
150 return -ESOCKTNOSUPPORT;
151 if (protocol != PF_KEY_V2)
152 return -EPROTONOSUPPORT;
153
154 err = -ENOMEM;
6257ff21 155 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
1da177e4
LT		 156 if (sk == NULL)
157 goto out;
8ff24541 158
1da177e4
LT		 159 sock->ops = &pfkey_ops;
160 sock_init_data(sock, sk);
161
162 sk->sk_family = PF_KEY;
163 sk->sk_destruct = pfkey_sock_destruct;
164
165 atomic_inc(&pfkey_socks_nr);
166
167 pfkey_insert(sk);
168
169 return 0;
170out:
171 return err;
172}
173
174static int pfkey_release(struct socket *sock)
175{
176 struct sock *sk = sock->sk;
177
178 if (!sk)
179 return 0;
180
181 pfkey_remove(sk);
182
183 sock_orphan(sk);
184 sock->sk = NULL;
185 skb_queue_purge(&sk->sk_write_queue);
186 sock_put(sk);
187
188 return 0;
189}
190
191static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
dd0fc66f 192 gfp_t allocation, struct sock *sk)
1da177e4
LT		 193{
194 int err = -ENOBUFS;
195
196 sock_hold(sk);
197 if (*skb2 == NULL) {
198 if (atomic_read(&skb->users) != 1) {
199 *skb2 = skb_clone(skb, allocation);
200 } else {
201 *skb2 = skb;
202 atomic_inc(&skb->users);
203 }
204 }
205 if (*skb2 != NULL) {
206 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
207 skb_orphan(*skb2);
208 skb_set_owner_r(*skb2, sk);
209 skb_queue_tail(&sk->sk_receive_queue, *skb2);
210 sk->sk_data_ready(sk, (*skb2)->len);
211 *skb2 = NULL;
212 err = 0;
213 }
214 }
215 sock_put(sk);
216 return err;
217}
218
219/* Send SKB to all pfkey sockets matching selected criteria. */
220#define BROADCAST_ALL 0
221#define BROADCAST_ONE 1
222#define BROADCAST_REGISTERED 2
223#define BROADCAST_PROMISC_ONLY 4
dd0fc66f 224static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
1da177e4
LT		 225 int broadcast_flags, struct sock *one_sk)
226{
227 struct sock *sk;
228 struct hlist_node *node;
229 struct sk_buff *skb2 = NULL;
230 int err = -ESRCH;
231
232 /* XXX Do we need something like netlink_overrun? I think
233 * XXX PF_KEY socket apps will not mind current behavior.
234 */
235 if (!skb)
236 return -ENOMEM;
237
238 pfkey_lock_table();
239 sk_for_each(sk, node, &pfkey_table) {
240 struct pfkey_sock *pfk = pfkey_sk(sk);
241 int err2;
242
243 /* Yes, it means that if you are meant to receive this
244 * pfkey message you receive it twice as promiscuous
245 * socket.
246 */
247 if (pfk->promisc)
248 pfkey_broadcast_one(skb, &skb2, allocation, sk);
249
250 /* the exact target will be processed later */
251 if (sk == one_sk)
252 continue;
253 if (broadcast_flags != BROADCAST_ALL) {
254 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
255 continue;
256 if ((broadcast_flags & BROADCAST_REGISTERED) &&
257 !pfk->registered)
258 continue;
259 if (broadcast_flags & BROADCAST_ONE)
260 continue;
261 }
262
263 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
264
265 /* Error is cleare after succecful sending to at least one
266 * registered KM */
267 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
268 err = err2;
269 }
270 pfkey_unlock_table();
271
272 if (one_sk != NULL)
273 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
274
275 if (skb2)
276 kfree_skb(skb2);
277 kfree_skb(skb);
278 return err;
279}
280
281static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
282{
283 *new = *orig;
284}
285
286static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
287{
288 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
289 struct sadb_msg *hdr;
290
291 if (!skb)
292 return -ENOBUFS;
293
294 /* Woe be to the platform trying to support PFKEY yet
295 * having normal errnos outside the 1-255 range, inclusive.
296 */
297 err = -err;
298 if (err == ERESTARTSYS ||
299 err == ERESTARTNOHAND ||
300 err == ERESTARTNOINTR)
301 err = EINTR;
302 if (err >= 512)
303 err = EINVAL;
09a62660 304 BUG_ON(err <= 0 || err >= 256);
1da177e4
LT		 305
306 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
307 pfkey_hdr_dup(hdr, orig);
308 hdr->sadb_msg_errno = (uint8_t) err;
309 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
310 sizeof(uint64_t));
311
312 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
313
314 return 0;
315}
316
317static u8 sadb_ext_min_len[] = {
318 [SADB_EXT_RESERVED] = (u8) 0,
319 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
320 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
321 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
322 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
323 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
324 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
325 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
326 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
327 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
328 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
329 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
330 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
331 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
332 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
333 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
334 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
335 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
336 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
337 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
338 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
339 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
340 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
341 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
df71837d 342 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
1da177e4
LT		 343};
344
345/* Verify sadb_address_{len,prefixlen} against sa_family. */
346static int verify_address_len(void *p)
347{
348 struct sadb_address *sp = p;
349 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
350 struct sockaddr_in *sin;
351#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
352 struct sockaddr_in6 *sin6;
353#endif
354 int len;
355
356 switch (addr->sa_family) {
357 case AF_INET:
356f89e1 358 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
1da177e4
LT		 359 if (sp->sadb_address_len != len ||
360 sp->sadb_address_prefixlen > 32)
361 return -EINVAL;
362 break;
363#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
364 case AF_INET6:
356f89e1 365 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
1da177e4
LT		 366 if (sp->sadb_address_len != len ||
367 sp->sadb_address_prefixlen > 128)
368 return -EINVAL;
369 break;
370#endif
371 default:
372 /* It is user using kernel to keep track of security
373 * associations for another protocol, such as
374 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
375 * lengths.
376 *
377 * XXX Actually, association/policy database is not yet
378 * XXX able to cope with arbitrary sockaddr families.
379 * XXX When it can, remove this -EINVAL. -DaveM
380 */
381 return -EINVAL;
382 break;
3ff50b79 383 }
1da177e4
LT		 384
385 return 0;
386}
387
df71837d
TJ		 388static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
389{
356f89e1
IJ		 390 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
391 sec_ctx->sadb_x_ctx_len,
392 sizeof(uint64_t));
df71837d
TJ		 393}
394
395static inline int verify_sec_ctx_len(void *p)
396{
397 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
298bb621 398 int len = sec_ctx->sadb_x_ctx_len;
df71837d 399
298bb621 400 if (len > PAGE_SIZE)
df71837d
TJ		 401 return -EINVAL;
402
403 len = pfkey_sec_ctx_len(sec_ctx);
404
405 if (sec_ctx->sadb_x_sec_len != len)
406 return -EINVAL;
407
408 return 0;
409}
410
411static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
412{
413 struct xfrm_user_sec_ctx *uctx = NULL;
414 int ctx_size = sec_ctx->sadb_x_ctx_len;
415
416 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
417
418 if (!uctx)
419 return NULL;
420
421 uctx->len = pfkey_sec_ctx_len(sec_ctx);
422 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
423 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
424 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
425 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
426 memcpy(uctx + 1, sec_ctx + 1,
427 uctx->ctx_len);
428
429 return uctx;
430}
431
1da177e4
LT		 432static int present_and_same_family(struct sadb_address *src,
433 struct sadb_address *dst)
434{
435 struct sockaddr *s_addr, *d_addr;
436
437 if (!src || !dst)
438 return 0;
439
440 s_addr = (struct sockaddr *)(src + 1);
441 d_addr = (struct sockaddr *)(dst + 1);
442 if (s_addr->sa_family != d_addr->sa_family)
443 return 0;
444 if (s_addr->sa_family != AF_INET
445#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
446 && s_addr->sa_family != AF_INET6
447#endif
448 )
449 return 0;
450
451 return 1;
452}
453
454static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
455{
456 char *p = (char *) hdr;
457 int len = skb->len;
458
459 len -= sizeof(*hdr);
460 p += sizeof(*hdr);
461 while (len > 0) {
462 struct sadb_ext *ehdr = (struct sadb_ext *) p;
463 uint16_t ext_type;
464 int ext_len;
465
466 ext_len = ehdr->sadb_ext_len;
467 ext_len *= sizeof(uint64_t);
468 ext_type = ehdr->sadb_ext_type;
469 if (ext_len < sizeof(uint64_t) ||
470 ext_len > len ||
471 ext_type == SADB_EXT_RESERVED)
472 return -EINVAL;
473
474 if (ext_type <= SADB_EXT_MAX) {
475 int min = (int) sadb_ext_min_len[ext_type];
476 if (ext_len < min)
477 return -EINVAL;
478 if (ext_hdrs[ext_type-1] != NULL)
479 return -EINVAL;
480 if (ext_type == SADB_EXT_ADDRESS_SRC ||
481 ext_type == SADB_EXT_ADDRESS_DST ||
482 ext_type == SADB_EXT_ADDRESS_PROXY ||
483 ext_type == SADB_X_EXT_NAT_T_OA) {
484 if (verify_address_len(p))
485 return -EINVAL;
8ff24541 486 }
df71837d
TJ		 487 if (ext_type == SADB_X_EXT_SEC_CTX) {
488 if (verify_sec_ctx_len(p))
489 return -EINVAL;
490 }
1da177e4
LT		 491 ext_hdrs[ext_type-1] = p;
492 }
493 p += ext_len;
494 len -= ext_len;
495 }
496
497 return 0;
498}
499
500static uint16_t
501pfkey_satype2proto(uint8_t satype)
502{
503 switch (satype) {
504 case SADB_SATYPE_UNSPEC:
505 return IPSEC_PROTO_ANY;
506 case SADB_SATYPE_AH:
507 return IPPROTO_AH;
508 case SADB_SATYPE_ESP:
509 return IPPROTO_ESP;
510 case SADB_X_SATYPE_IPCOMP:
511 return IPPROTO_COMP;
512 break;
513 default:
514 return 0;
515 }
516 /* NOTREACHED */
517}
518
519static uint8_t
520pfkey_proto2satype(uint16_t proto)
521{
522 switch (proto) {
523 case IPPROTO_AH:
524 return SADB_SATYPE_AH;
525 case IPPROTO_ESP:
526 return SADB_SATYPE_ESP;
527 case IPPROTO_COMP:
528 return SADB_X_SATYPE_IPCOMP;
529 break;
530 default:
531 return 0;
532 }
533 /* NOTREACHED */
534}
535
536/* BTW, this scheme means that there is no way with PFKEY2 sockets to
537 * say specifically 'just raw sockets' as we encode them as 255.
538 */
539
540static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
541{
542 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
543}
544
545static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
546{
547 return (proto ? proto : IPSEC_PROTO_ANY);
548}
549
550static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
551 xfrm_address_t *xaddr)
552{
553 switch (((struct sockaddr*)(addr + 1))->sa_family) {
554 case AF_INET:
8ff24541 555 xaddr->a4 =
1da177e4
LT		 556 ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
557 return AF_INET;
558#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
559 case AF_INET6:
8ff24541 560 memcpy(xaddr->a6,
1da177e4
LT		 561 &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
562 sizeof(struct in6_addr));
563 return AF_INET6;
564#endif
565 default:
566 return 0;
567 }
568 /* NOTREACHED */
569}
570
571static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
572{
573 struct sadb_sa *sa;
574 struct sadb_address *addr;
575 uint16_t proto;
576 unsigned short family;
577 xfrm_address_t *xaddr;
578
579 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
580 if (sa == NULL)
581 return NULL;
582
583 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
584 if (proto == 0)
585 return NULL;
586
587 /* sadb_address_len should be checked by caller */
588 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
589 if (addr == NULL)
590 return NULL;
591
592 family = ((struct sockaddr *)(addr + 1))->sa_family;
593 switch (family) {
594 case AF_INET:
595 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
596 break;
597#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
598 case AF_INET6:
599 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
600 break;
601#endif
602 default:
603 xaddr = NULL;
604 }
605
606 if (!xaddr)
607 return NULL;
608
609 return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
610}
611
612#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
613static int
614pfkey_sockaddr_size(sa_family_t family)
615{
616 switch (family) {
617 case AF_INET:
618 return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
619#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
620 case AF_INET6:
621 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
622#endif
623 default:
624 return 0;
625 }
626 /* NOTREACHED */
627}
628
55569ce2
KM		 629static inline int pfkey_mode_from_xfrm(int mode)
630{
631 switch(mode) {
632 case XFRM_MODE_TRANSPORT:
633 return IPSEC_MODE_TRANSPORT;
634 case XFRM_MODE_TUNNEL:
635 return IPSEC_MODE_TUNNEL;
636 case XFRM_MODE_BEET:
637 return IPSEC_MODE_BEET;
638 default:
639 return -1;
640 }
641}
642
643static inline int pfkey_mode_to_xfrm(int mode)
644{
645 switch(mode) {
646 case IPSEC_MODE_ANY: /*XXX*/
647 case IPSEC_MODE_TRANSPORT:
648 return XFRM_MODE_TRANSPORT;
649 case IPSEC_MODE_TUNNEL:
650 return XFRM_MODE_TUNNEL;
651 case IPSEC_MODE_BEET:
652 return XFRM_MODE_BEET;
653 default:
654 return -1;
655 }
656}
657
050f009e
HX		 658static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
659 int add_keys, int hsc)
1da177e4
LT		 660{
661 struct sk_buff *skb;
662 struct sadb_msg *hdr;
663 struct sadb_sa *sa;
664 struct sadb_lifetime *lifetime;
665 struct sadb_address *addr;
666 struct sadb_key *key;
667 struct sadb_x_sa2 *sa2;
668 struct sockaddr_in *sin;
df71837d
TJ		 669 struct sadb_x_sec_ctx *sec_ctx;
670 struct xfrm_sec_ctx *xfrm_ctx;
671 int ctx_size = 0;
1da177e4
LT		 672#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
673 struct sockaddr_in6 *sin6;
674#endif
675 int size;
676 int auth_key_size = 0;
677 int encrypt_key_size = 0;
678 int sockaddr_size;
679 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 680 int mode;
1da177e4
LT		 681
682 /* address family check */
683 sockaddr_size = pfkey_sockaddr_size(x->props.family);
684 if (!sockaddr_size)
685 return ERR_PTR(-EINVAL);
686
687 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
688 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 689 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 690 sizeof(struct sadb_lifetime) +
691 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
692 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 693 sizeof(struct sadb_address)*2 +
1da177e4
LT		 694 sockaddr_size*2 +
695 sizeof(struct sadb_x_sa2);
df71837d
TJ		 696
697 if ((xfrm_ctx = x->security)) {
698 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
699 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
700 }
701
1da177e4
LT		 702 /* identity & sensitivity */
703
704 if ((x->props.family == AF_INET &&
705 x->sel.saddr.a4 != x->props.saddr.a4)
706#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
707 || (x->props.family == AF_INET6 &&
708 memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
709#endif
710 )
711 size += sizeof(struct sadb_address) + sockaddr_size;
712
713 if (add_keys) {
714 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 715 auth_key_size =
716 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 717 size += sizeof(struct sadb_key) + auth_key_size;
718 }
719 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 720 encrypt_key_size =
721 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 722 size += sizeof(struct sadb_key) + encrypt_key_size;
723 }
724 }
725 if (x->encap)
726 natt = x->encap;
727
728 if (natt && natt->encap_type) {
729 size += sizeof(struct sadb_x_nat_t_type);
730 size += sizeof(struct sadb_x_nat_t_port);
731 size += sizeof(struct sadb_x_nat_t_port);
732 }
733
734 skb = alloc_skb(size + 16, GFP_ATOMIC);
735 if (skb == NULL)
736 return ERR_PTR(-ENOBUFS);
737
738 /* call should fill header later */
739 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
740 memset(hdr, 0, size); /* XXX do we need this ? */
741 hdr->sadb_msg_len = size / sizeof(uint64_t);
742
743 /* sa */
744 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
745 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
746 sa->sadb_sa_exttype = SADB_EXT_SA;
747 sa->sadb_sa_spi = x->id.spi;
748 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 749 switch (x->km.state) {
750 case XFRM_STATE_VALID:
751 sa->sadb_sa_state = x->km.dying ?
752 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
753 break;
754 case XFRM_STATE_ACQ:
1da177e4 755 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 756 break;
757 default:
1da177e4 758 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 759 break;
760 }
1da177e4
LT		 761 sa->sadb_sa_auth = 0;
762 if (x->aalg) {
763 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
764 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
765 }
766 sa->sadb_sa_encrypt = 0;
767 BUG_ON(x->ealg && x->calg);
768 if (x->ealg) {
769 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
770 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
771 }
772 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
773 if (x->calg) {
774 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
775 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
776 }
777
778 sa->sadb_sa_flags = 0;
779 if (x->props.flags & XFRM_STATE_NOECN)
780 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
781 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
782 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 783 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
784 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 785
786 /* hard time */
787 if (hsc & 2) {
8ff24541 788 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 789 sizeof(struct sadb_lifetime));
790 lifetime->sadb_lifetime_len =
791 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
792 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
793 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
794 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
795 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
796 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
797 }
798 /* soft time */
799 if (hsc & 1) {
8ff24541 800 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 801 sizeof(struct sadb_lifetime));
802 lifetime->sadb_lifetime_len =
803 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
804 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
805 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
806 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
807 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
808 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
809 }
810 /* current time */
811 lifetime = (struct sadb_lifetime *) skb_put(skb,
812 sizeof(struct sadb_lifetime));
813 lifetime->sadb_lifetime_len =
814 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
815 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
816 lifetime->sadb_lifetime_allocations = x->curlft.packets;
817 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
818 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
819 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
820 /* src address */
8ff24541 821 addr = (struct sadb_address*) skb_put(skb,
1da177e4 822 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 823 addr->sadb_address_len =
1da177e4
LT		 824 (sizeof(struct sadb_address)+sockaddr_size)/
825 sizeof(uint64_t);
826 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 827 /* "if the ports are non-zero, then the sadb_address_proto field,
828 normally zero, MUST be filled in with the transport
1da177e4 829 protocol's number." - RFC2367 */
8ff24541 830 addr->sadb_address_proto = 0;
1da177e4
LT		 831 addr->sadb_address_reserved = 0;
832 if (x->props.family == AF_INET) {
833 addr->sadb_address_prefixlen = 32;
834
835 sin = (struct sockaddr_in *) (addr + 1);
836 sin->sin_family = AF_INET;
837 sin->sin_addr.s_addr = x->props.saddr.a4;
838 sin->sin_port = 0;
839 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
840 }
841#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
842 else if (x->props.family == AF_INET6) {
8ff24541 843 addr->sadb_address_prefixlen = 128;
1da177e4
LT		 844
845 sin6 = (struct sockaddr_in6 *) (addr + 1);
846 sin6->sin6_family = AF_INET6;
847 sin6->sin6_port = 0;
848 sin6->sin6_flowinfo = 0;
8ff24541 849 memcpy(&sin6->sin6_addr, x->props.saddr.a6,
1da177e4
LT		 850 sizeof(struct in6_addr));
851 sin6->sin6_scope_id = 0;
8ff24541 852 }
1da177e4
LT		 853#endif
854 else
855 BUG();
856
857 /* dst address */
8ff24541 858 addr = (struct sadb_address*) skb_put(skb,
1da177e4 859 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 860 addr->sadb_address_len =
1da177e4
LT		 861 (sizeof(struct sadb_address)+sockaddr_size)/
862 sizeof(uint64_t);
863 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
8ff24541
YH		 864 addr->sadb_address_proto = 0;
865 addr->sadb_address_prefixlen = 32; /* XXX */
1da177e4
LT		 866 addr->sadb_address_reserved = 0;
867 if (x->props.family == AF_INET) {
868 sin = (struct sockaddr_in *) (addr + 1);
869 sin->sin_family = AF_INET;
870 sin->sin_addr.s_addr = x->id.daddr.a4;
871 sin->sin_port = 0;
872 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
873
874 if (x->sel.saddr.a4 != x->props.saddr.a4) {
8ff24541 875 addr = (struct sadb_address*) skb_put(skb,
1da177e4 876 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 877 addr->sadb_address_len =
1da177e4
LT		 878 (sizeof(struct sadb_address)+sockaddr_size)/
879 sizeof(uint64_t);
880 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
881 addr->sadb_address_proto =
882 pfkey_proto_from_xfrm(x->sel.proto);
883 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
884 addr->sadb_address_reserved = 0;
885
886 sin = (struct sockaddr_in *) (addr + 1);
887 sin->sin_family = AF_INET;
888 sin->sin_addr.s_addr = x->sel.saddr.a4;
889 sin->sin_port = x->sel.sport;
890 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
891 }
892 }
893#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
894 else if (x->props.family == AF_INET6) {
895 addr->sadb_address_prefixlen = 128;
896
897 sin6 = (struct sockaddr_in6 *) (addr + 1);
898 sin6->sin6_family = AF_INET6;
899 sin6->sin6_port = 0;
900 sin6->sin6_flowinfo = 0;
901 memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
902 sin6->sin6_scope_id = 0;
903
904 if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
905 sizeof(struct in6_addr))) {
8ff24541 906 addr = (struct sadb_address *) skb_put(skb,
1da177e4 907 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 908 addr->sadb_address_len =
1da177e4
LT		 909 (sizeof(struct sadb_address)+sockaddr_size)/
910 sizeof(uint64_t);
911 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
912 addr->sadb_address_proto =
913 pfkey_proto_from_xfrm(x->sel.proto);
914 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
915 addr->sadb_address_reserved = 0;
916
917 sin6 = (struct sockaddr_in6 *) (addr + 1);
918 sin6->sin6_family = AF_INET6;
919 sin6->sin6_port = x->sel.sport;
920 sin6->sin6_flowinfo = 0;
921 memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
922 sizeof(struct in6_addr));
923 sin6->sin6_scope_id = 0;
924 }
925 }
926#endif
927 else
928 BUG();
929
930 /* auth key */
931 if (add_keys && auth_key_size) {
8ff24541 932 key = (struct sadb_key *) skb_put(skb,
1da177e4
LT		 933 sizeof(struct sadb_key)+auth_key_size);
934 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
935 sizeof(uint64_t);
936 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
937 key->sadb_key_bits = x->aalg->alg_key_len;
938 key->sadb_key_reserved = 0;
939 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
940 }
941 /* encrypt key */
942 if (add_keys && encrypt_key_size) {
8ff24541 943 key = (struct sadb_key *) skb_put(skb,
1da177e4 944 sizeof(struct sadb_key)+encrypt_key_size);
8ff24541 945 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 946 encrypt_key_size) / sizeof(uint64_t);
947 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
948 key->sadb_key_bits = x->ealg->alg_key_len;
949 key->sadb_key_reserved = 0;
8ff24541 950 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 951 (x->ealg->alg_key_len+7)/8);
952 }
953
954 /* sa */
955 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
956 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
957 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 958 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
959 kfree_skb(skb);
960 return ERR_PTR(-EINVAL);
961 }
962 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 963 sa2->sadb_x_sa2_reserved1 = 0;
964 sa2->sadb_x_sa2_reserved2 = 0;
965 sa2->sadb_x_sa2_sequence = 0;
966 sa2->sadb_x_sa2_reqid = x->props.reqid;
967
968 if (natt && natt->encap_type) {
969 struct sadb_x_nat_t_type *n_type;
970 struct sadb_x_nat_t_port *n_port;
971
972 /* type */
973 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
974 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
975 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
976 n_type->sadb_x_nat_t_type_type = natt->encap_type;
977 n_type->sadb_x_nat_t_type_reserved[0] = 0;
978 n_type->sadb_x_nat_t_type_reserved[1] = 0;
979 n_type->sadb_x_nat_t_type_reserved[2] = 0;
980
981 /* source port */
982 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
983 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
984 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
985 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
986 n_port->sadb_x_nat_t_port_reserved = 0;
987
988 /* dest port */
989 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
990 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
991 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
992 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
993 n_port->sadb_x_nat_t_port_reserved = 0;
994 }
995
df71837d
TJ		 996 /* security context */
997 if (xfrm_ctx) {
998 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
999 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000 sec_ctx->sadb_x_sec_len =
1001 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007 xfrm_ctx->ctx_len);
1008 }
1009
1da177e4
LT		 1010 return skb;
1011}
1012
050f009e
HX		 1013
1014static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1015{
1016 struct sk_buff *skb;
1017
050f009e 1018 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1019
1020 return skb;
1021}
1022
1023static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1024 int hsc)
1025{
1026 return __pfkey_xfrm_state2msg(x, 0, hsc);
1027}
1028
8ff24541 1029static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1da177e4
LT		 1030 void **ext_hdrs)
1031{
8ff24541 1032 struct xfrm_state *x;
1da177e4
LT		 1033 struct sadb_lifetime *lifetime;
1034 struct sadb_sa *sa;
1035 struct sadb_key *key;
df71837d 1036 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1037 uint16_t proto;
1038 int err;
8ff24541 1039
1da177e4
LT		 1040
1041 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1042 if (!sa ||
1043 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1044 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1045 return ERR_PTR(-EINVAL);
1046 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1047 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1048 return ERR_PTR(-EINVAL);
1049 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1050 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1051 return ERR_PTR(-EINVAL);
1052 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1053 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1054 return ERR_PTR(-EINVAL);
1055
1056 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1057 if (proto == 0)
1058 return ERR_PTR(-EINVAL);
1059
1060 /* default error is no buffer space */
1061 err = -ENOBUFS;
1062
1063 /* RFC2367:
1064
1065 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1066 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1067 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1068 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1069 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1070 not true.
1071
8ff24541 1072 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1073 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1074 */
1075 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1076 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1077 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1078 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1079 return ERR_PTR(-EINVAL);
1080 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1081 if (key != NULL &&
1082 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1083 ((key->sadb_key_bits+7) / 8 == 0 ||
1084 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1085 return ERR_PTR(-EINVAL);
1086 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1087 if (key != NULL &&
1088 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1089 ((key->sadb_key_bits+7) / 8 == 0 ||
1090 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1091 return ERR_PTR(-EINVAL);
1092
1093 x = xfrm_state_alloc();
1094 if (x == NULL)
1095 return ERR_PTR(-ENOBUFS);
1096
1097 x->id.proto = proto;
1098 x->id.spi = sa->sadb_sa_spi;
1099 x->props.replay_window = sa->sadb_sa_replay;
1100 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1101 x->props.flags |= XFRM_STATE_NOECN;
1102 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1103 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1104 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1105 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4
LT		 1106
1107 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1108 if (lifetime != NULL) {
1109 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1110 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1111 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1112 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1113 }
1114 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1115 if (lifetime != NULL) {
1116 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1117 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1118 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1119 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1120 }
df71837d
TJ		 1121
1122 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1123 if (sec_ctx != NULL) {
1124 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1125
1126 if (!uctx)
1127 goto out;
1128
1129 err = security_xfrm_state_alloc(x, uctx);
1130 kfree(uctx);
1131
1132 if (err)
1133 goto out;
1134 }
1135
1da177e4
LT		 1136 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1137 if (sa->sadb_sa_auth) {
1138 int keysize = 0;
1139 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1140 if (!a) {
1141 err = -ENOSYS;
1142 goto out;
1143 }
1144 if (key)
1145 keysize = (key->sadb_key_bits + 7) / 8;
1146 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1147 if (!x->aalg)
1148 goto out;
1149 strcpy(x->aalg->alg_name, a->name);
1150 x->aalg->alg_key_len = 0;
1151 if (key) {
1152 x->aalg->alg_key_len = key->sadb_key_bits;
1153 memcpy(x->aalg->alg_key, key+1, keysize);
1154 }
1155 x->props.aalgo = sa->sadb_sa_auth;
1156 /* x->algo.flags = sa->sadb_sa_flags; */
1157 }
1158 if (sa->sadb_sa_encrypt) {
1159 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161 if (!a) {
1162 err = -ENOSYS;
1163 goto out;
1164 }
1165 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166 if (!x->calg)
1167 goto out;
1168 strcpy(x->calg->alg_name, a->name);
1169 x->props.calgo = sa->sadb_sa_encrypt;
1170 } else {
1171 int keysize = 0;
1172 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173 if (!a) {
1174 err = -ENOSYS;
1175 goto out;
1176 }
1177 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178 if (key)
1179 keysize = (key->sadb_key_bits + 7) / 8;
1180 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181 if (!x->ealg)
1182 goto out;
1183 strcpy(x->ealg->alg_name, a->name);
1184 x->ealg->alg_key_len = 0;
1185 if (key) {
1186 x->ealg->alg_key_len = key->sadb_key_bits;
1187 memcpy(x->ealg->alg_key, key+1, keysize);
1188 }
1189 x->props.ealgo = sa->sadb_sa_encrypt;
1190 }
1191 }
1192 /* x->algo.flags = sa->sadb_sa_flags; */
1193
8ff24541 1194 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 1195 &x->props.saddr);
1196 if (!x->props.family) {
1197 err = -EAFNOSUPPORT;
1198 goto out;
1199 }
8ff24541 1200 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1201 &x->id.daddr);
1202
1203 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1205 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206 if (mode < 0) {
1207 err = -EINVAL;
1208 goto out;
1209 }
1210 x->props.mode = mode;
1da177e4
LT		 1211 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212 }
1213
1214 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216
1217 /* Nobody uses this, but we try. */
1218 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220 }
1221
4a4b6271
JL		 1222 if (!x->sel.family)
1223 x->sel.family = x->props.family;
1224
1da177e4
LT		 1225 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226 struct sadb_x_nat_t_type* n_type;
1227 struct xfrm_encap_tmpl *natt;
1228
1229 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230 if (!x->encap)
1231 goto out;
1232
1233 natt = x->encap;
1234 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238 struct sadb_x_nat_t_port* n_port =
1239 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241 }
1242 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243 struct sadb_x_nat_t_port* n_port =
1244 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246 }
1247 }
1248
72cb6962
HX		 1249 err = xfrm_init_state(x);
1250 if (err)
1da177e4 1251 goto out;
72cb6962 1252
1da177e4 1253 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1254 return x;
1255
1256out:
1257 x->km.state = XFRM_STATE_DEAD;
1258 xfrm_state_put(x);
1259 return ERR_PTR(err);
1260}
1261
1262static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1263{
1264 return -EOPNOTSUPP;
1265}
1266
1267static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1268{
1269 struct sk_buff *resp_skb;
1270 struct sadb_x_sa2 *sa2;
1271 struct sadb_address *saddr, *daddr;
1272 struct sadb_msg *out_hdr;
658b219e 1273 struct sadb_spirange *range;
1da177e4 1274 struct xfrm_state *x = NULL;
55569ce2 1275 int mode;
658b219e
HX		 1276 int err;
1277 u32 min_spi, max_spi;
1da177e4
LT		 1278 u32 reqid;
1279 u8 proto;
1280 unsigned short family;
1281 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1282
1283 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1284 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1285 return -EINVAL;
1286
1287 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1288 if (proto == 0)
1289 return -EINVAL;
1290
1291 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1292 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1293 if (mode < 0)
1294 return -EINVAL;
1da177e4
LT		 1295 reqid = sa2->sadb_x_sa2_reqid;
1296 } else {
1297 mode = 0;
1298 reqid = 0;
1299 }
1300
1301 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1302 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1303
1304 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1305 switch (family) {
1306 case AF_INET:
1307 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1308 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1309 break;
1310#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1311 case AF_INET6:
1312 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1313 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1314 break;
1315#endif
1316 }
1317
1318 if (hdr->sadb_msg_seq) {
1319 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1320 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1321 xfrm_state_put(x);
1322 x = NULL;
1323 }
1324 }
1325
1326 if (!x)
1327 x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
1328
1329 if (x == NULL)
1330 return -ENOENT;
1331
658b219e
HX		 1332 min_spi = 0x100;
1333 max_spi = 0x0fffffff;
1da177e4 1334
658b219e
HX		 1335 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1336 if (range) {
1337 min_spi = range->sadb_spirange_min;
1338 max_spi = range->sadb_spirange_max;
1da177e4 1339 }
658b219e
HX		 1340
1341 err = xfrm_alloc_spi(x, min_spi, max_spi);
050f009e 1342 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1343
1344 if (IS_ERR(resp_skb)) {
1345 xfrm_state_put(x);
1346 return PTR_ERR(resp_skb);
1347 }
1348
1349 out_hdr = (struct sadb_msg *) resp_skb->data;
1350 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1351 out_hdr->sadb_msg_type = SADB_GETSPI;
1352 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1353 out_hdr->sadb_msg_errno = 0;
1354 out_hdr->sadb_msg_reserved = 0;
1355 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1356 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1357
1358 xfrm_state_put(x);
1359
1360 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1361
1362 return 0;
1363}
1364
1365static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1366{
1367 struct xfrm_state *x;
1368
1369 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1370 return -EOPNOTSUPP;
1371
1372 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1373 return 0;
1374
1375 x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
1376 if (x == NULL)
1377 return 0;
1378
1379 spin_lock_bh(&x->lock);
1380 if (x->km.state == XFRM_STATE_ACQ) {
1381 x->km.state = XFRM_STATE_ERROR;
1382 wake_up(&km_waitq);
1383 }
1384 spin_unlock_bh(&x->lock);
1385 xfrm_state_put(x);
1386 return 0;
1387}
1388
26b15dad
JHS		 1389static inline int event2poltype(int event)
1390{
1391 switch (event) {
f60f6b8f 1392 case XFRM_MSG_DELPOLICY:
26b15dad 1393 return SADB_X_SPDDELETE;
f60f6b8f 1394 case XFRM_MSG_NEWPOLICY:
26b15dad 1395 return SADB_X_SPDADD;
f60f6b8f 1396 case XFRM_MSG_UPDPOLICY:
26b15dad 1397 return SADB_X_SPDUPDATE;
f60f6b8f 1398 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1399 // return SADB_X_SPDEXPIRE;
1400 default:
1401 printk("pfkey: Unknown policy event %d\n", event);
1402 break;
1403 }
1404
1405 return 0;
1406}
1407
1408static inline int event2keytype(int event)
1409{
1410 switch (event) {
f60f6b8f 1411 case XFRM_MSG_DELSA:
26b15dad 1412 return SADB_DELETE;
f60f6b8f 1413 case XFRM_MSG_NEWSA:
26b15dad 1414 return SADB_ADD;
f60f6b8f 1415 case XFRM_MSG_UPDSA:
26b15dad 1416 return SADB_UPDATE;
f60f6b8f 1417 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1418 return SADB_EXPIRE;
1419 default:
1420 printk("pfkey: Unknown SA event %d\n", event);
1421 break;
1422 }
1423
1424 return 0;
1425}
1426
1427/* ADD/UPD/DEL */
1428static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1429{
1430 struct sk_buff *skb;
1431 struct sadb_msg *hdr;
26b15dad 1432
050f009e 1433 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1434
1435 if (IS_ERR(skb))
1436 return PTR_ERR(skb);
1437
1438 hdr = (struct sadb_msg *) skb->data;
1439 hdr->sadb_msg_version = PF_KEY_V2;
1440 hdr->sadb_msg_type = event2keytype(c->event);
1441 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1442 hdr->sadb_msg_errno = 0;
1443 hdr->sadb_msg_reserved = 0;
1444 hdr->sadb_msg_seq = c->seq;
1445 hdr->sadb_msg_pid = c->pid;
1446
1447 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1448
1449 return 0;
1450}
1da177e4
LT		 1451
1452static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1453{
1da177e4
LT		 1454 struct xfrm_state *x;
1455 int err;
26b15dad 1456 struct km_event c;
1da177e4 1457
1da177e4
LT		 1458 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1459 if (IS_ERR(x))
1460 return PTR_ERR(x);
1461
26b15dad 1462 xfrm_state_hold(x);
1da177e4
LT		 1463 if (hdr->sadb_msg_type == SADB_ADD)
1464 err = xfrm_state_add(x);
1465 else
1466 err = xfrm_state_update(x);
1467
ab5f5e8b 1468 xfrm_audit_state_add(x, err ? 0 : 1,
0c11b942 1469 audit_get_loginuid(current), 0);
161a09e7 1470
1da177e4
LT		 1471 if (err < 0) {
1472 x->km.state = XFRM_STATE_DEAD;
21380b81 1473 __xfrm_state_put(x);
7d6dfe1f 1474 goto out;
1da177e4
LT		 1475 }
1476
26b15dad 1477 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1478 c.event = XFRM_MSG_NEWSA;
26b15dad 1479 else
f60f6b8f 1480 c.event = XFRM_MSG_UPDSA;
26b15dad
JHS		 1481 c.seq = hdr->sadb_msg_seq;
1482 c.pid = hdr->sadb_msg_pid;
1483 km_state_notify(x, &c);
7d6dfe1f 1484out:
26b15dad 1485 xfrm_state_put(x);
26b15dad 1486 return err;
1da177e4
LT		 1487}
1488
1489static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1490{
1491 struct xfrm_state *x;
26b15dad
JHS		 1492 struct km_event c;
1493 int err;
1da177e4
LT		 1494
1495 if (!ext_hdrs[SADB_EXT_SA-1] ||
1496 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1497 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1498 return -EINVAL;
1499
1500 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1501 if (x == NULL)
1502 return -ESRCH;
1503
c8c05a8e
CZ		 1504 if ((err = security_xfrm_state_delete(x)))
1505 goto out;
1506
1da177e4 1507 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1508 err = -EPERM;
1509 goto out;
1da177e4 1510 }
161a09e7 1511
26b15dad 1512 err = xfrm_state_delete(x);
161a09e7 1513
c8c05a8e
CZ		 1514 if (err < 0)
1515 goto out;
1da177e4 1516
26b15dad
JHS		 1517 c.seq = hdr->sadb_msg_seq;
1518 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1519 c.event = XFRM_MSG_DELSA;
26b15dad 1520 km_state_notify(x, &c);
c8c05a8e 1521out:
ab5f5e8b 1522 xfrm_audit_state_delete(x, err ? 0 : 1,
0c11b942 1523 audit_get_loginuid(current), 0);
26b15dad 1524 xfrm_state_put(x);
1da177e4 1525
26b15dad 1526 return err;
1da177e4
LT		 1527}
1528
1529static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1530{
1531 __u8 proto;
1532 struct sk_buff *out_skb;
1533 struct sadb_msg *out_hdr;
1534 struct xfrm_state *x;
1535
1536 if (!ext_hdrs[SADB_EXT_SA-1] ||
1537 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539 return -EINVAL;
1540
1541 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542 if (x == NULL)
1543 return -ESRCH;
1544
050f009e 1545 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1546 proto = x->id.proto;
1547 xfrm_state_put(x);
1548 if (IS_ERR(out_skb))
1549 return PTR_ERR(out_skb);
1550
1551 out_hdr = (struct sadb_msg *) out_skb->data;
1552 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1553 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1554 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1555 out_hdr->sadb_msg_errno = 0;
1556 out_hdr->sadb_msg_reserved = 0;
1557 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1558 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1559 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1560
1561 return 0;
1562}
1563
00fa0233 1564static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
dd0fc66f 1565 gfp_t allocation)
1da177e4
LT		 1566{
1567 struct sk_buff *skb;
1568 struct sadb_msg *hdr;
1569 int len, auth_len, enc_len, i;
1570
1571 auth_len = xfrm_count_auth_supported();
1572 if (auth_len) {
1573 auth_len *= sizeof(struct sadb_alg);
1574 auth_len += sizeof(struct sadb_supported);
1575 }
8ff24541 1576
1da177e4
LT		 1577 enc_len = xfrm_count_enc_supported();
1578 if (enc_len) {
1579 enc_len *= sizeof(struct sadb_alg);
1580 enc_len += sizeof(struct sadb_supported);
1581 }
8ff24541 1582
1da177e4
LT		 1583 len = enc_len + auth_len + sizeof(struct sadb_msg);
1584
1585 skb = alloc_skb(len + 16, allocation);
1586 if (!skb)
1587 goto out_put_algs;
1588
1589 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1590 pfkey_hdr_dup(hdr, orig);
1591 hdr->sadb_msg_errno = 0;
1592 hdr->sadb_msg_len = len / sizeof(uint64_t);
1593
1594 if (auth_len) {
1595 struct sadb_supported *sp;
1596 struct sadb_alg *ap;
1597
1598 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1599 ap = (struct sadb_alg *) (sp + 1);
1600
1601 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1602 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1603
1604 for (i = 0; ; i++) {
1605 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1606 if (!aalg)
1607 break;
1608 if (aalg->available)
1609 *ap++ = aalg->desc;
1610 }
1611 }
1612
1613 if (enc_len) {
1614 struct sadb_supported *sp;
1615 struct sadb_alg *ap;
1616
1617 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1618 ap = (struct sadb_alg *) (sp + 1);
1619
1620 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1621 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1622
1623 for (i = 0; ; i++) {
1624 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1625 if (!ealg)
1626 break;
1627 if (ealg->available)
1628 *ap++ = ealg->desc;
1629 }
1630 }
1631
1632out_put_algs:
1633 return skb;
1634}
1635
1636static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1637{
1638 struct pfkey_sock *pfk = pfkey_sk(sk);
1639 struct sk_buff *supp_skb;
1640
1641 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1642 return -EINVAL;
1643
1644 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1645 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1646 return -EEXIST;
1647 pfk->registered |= (1<<hdr->sadb_msg_satype);
1648 }
1649
1650 xfrm_probe_algs();
8ff24541 1651
1da177e4
LT		 1652 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1653 if (!supp_skb) {
1654 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1655 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1656
1657 return -ENOBUFS;
1658 }
1659
1660 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1661
1662 return 0;
1663}
1664
26b15dad
JHS		 1665static int key_notify_sa_flush(struct km_event *c)
1666{
1667 struct sk_buff *skb;
1668 struct sadb_msg *hdr;
1669
1670 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1671 if (!skb)
1672 return -ENOBUFS;
1673 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1674 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1675 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad
JHS		 1676 hdr->sadb_msg_seq = c->seq;
1677 hdr->sadb_msg_pid = c->pid;
1678 hdr->sadb_msg_version = PF_KEY_V2;
1679 hdr->sadb_msg_errno = (uint8_t) 0;
1680 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1681
1682 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1683
1684 return 0;
1685}
1686
1da177e4
LT		 1687static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1688{
1689 unsigned proto;
26b15dad 1690 struct km_event c;
161a09e7 1691 struct xfrm_audit audit_info;
4aa2e62c 1692 int err;
1da177e4
LT		 1693
1694 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1695 if (proto == 0)
1696 return -EINVAL;
1697
0c11b942 1698 audit_info.loginuid = audit_get_loginuid(current);
161a09e7 1699 audit_info.secid = 0;
4aa2e62c
JL		 1700 err = xfrm_state_flush(proto, &audit_info);
1701 if (err)
1702 return err;
bf08867f 1703 c.data.proto = proto;
26b15dad
JHS		 1704 c.seq = hdr->sadb_msg_seq;
1705 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1706 c.event = XFRM_MSG_FLUSHSA;
26b15dad 1707 km_state_notify(NULL, &c);
1da177e4
LT		 1708
1709 return 0;
1710}
1711
1712struct pfkey_dump_data
1713{
1714 struct sk_buff *skb;
1715 struct sadb_msg *hdr;
1716 struct sock *sk;
1717};
1718
1719static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1720{
1721 struct pfkey_dump_data *data = ptr;
1722 struct sk_buff *out_skb;
1723 struct sadb_msg *out_hdr;
1724
050f009e 1725 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1726 if (IS_ERR(out_skb))
1727 return PTR_ERR(out_skb);
1728
1729 out_hdr = (struct sadb_msg *) out_skb->data;
1730 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
1731 out_hdr->sadb_msg_type = SADB_DUMP;
1732 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1733 out_hdr->sadb_msg_errno = 0;
1734 out_hdr->sadb_msg_reserved = 0;
1735 out_hdr->sadb_msg_seq = count;
1736 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
1737 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
1738 return 0;
1739}
1740
1741static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1742{
1743 u8 proto;
1744 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
4c563f76
TT		 1745 struct xfrm_state_walk walk;
1746 int rc;
1da177e4
LT		 1747
1748 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1749 if (proto == 0)
1750 return -EINVAL;
1751
4c563f76
TT		 1752 xfrm_state_walk_init(&walk, proto);
1753 rc = xfrm_state_walk(&walk, dump_sa, &data);
1754 xfrm_state_walk_done(&walk);
1755
1756 return rc;
1da177e4
LT		 1757}
1758
1759static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1760{
1761 struct pfkey_sock *pfk = pfkey_sk(sk);
1762 int satype = hdr->sadb_msg_satype;
1763
1764 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1765 /* XXX we mangle packet... */
1766 hdr->sadb_msg_errno = 0;
1767 if (satype != 0 && satype != 1)
1768 return -EINVAL;
1769 pfk->promisc = satype;
1770 }
1771 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1772 return 0;
1773}
1774
1775static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1776{
1777 int i;
1778 u32 reqid = *(u32*)ptr;
1779
1780 for (i=0; i<xp->xfrm_nr; i++) {
1781 if (xp->xfrm_vec[i].reqid == reqid)
1782 return -EEXIST;
1783 }
1784 return 0;
1785}
1786
1787static u32 gen_reqid(void)
1788{
4c563f76 1789 struct xfrm_policy_walk walk;
1da177e4 1790 u32 start;
4c563f76 1791 int rc;
1da177e4
LT		 1792 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1793
1794 start = reqid;
1795 do {
1796 ++reqid;
1797 if (reqid == 0)
1798 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76
TT		 1799 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
1800 rc = xfrm_policy_walk(&walk, check_reqid, (void*)&reqid);
1801 xfrm_policy_walk_done(&walk);
1802 if (rc != -EEXIST)
1da177e4
LT		 1803 return reqid;
1804 } while (reqid != start);
1805 return 0;
1806}
1807
1808static int
1809parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1810{
1811 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1812 struct sockaddr_in *sin;
1813#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1814 struct sockaddr_in6 *sin6;
1815#endif
55569ce2 1816 int mode;
1da177e4
LT		 1817
1818 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1819 return -ELOOP;
1820
1821 if (rq->sadb_x_ipsecrequest_mode == 0)
1822 return -EINVAL;
1823
1824 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1825 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1826 return -EINVAL;
1827 t->mode = mode;
1da177e4
LT		 1828 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1829 t->optional = 1;
1830 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1831 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1832 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1833 t->reqid = 0;
1834 if (!t->reqid && !(t->reqid = gen_reqid()))
1835 return -ENOBUFS;
1836 }
1837
1838 /* addresses present only in tunnel mode */
7e49e6de 1839 if (t->mode == XFRM_MODE_TUNNEL) {
2718aa7c
MK		 1840 struct sockaddr *sa;
1841 sa = (struct sockaddr *)(rq+1);
1842 switch(sa->sa_family) {
1da177e4 1843 case AF_INET:
2718aa7c 1844 sin = (struct sockaddr_in*)sa;
1da177e4
LT		 1845 t->saddr.a4 = sin->sin_addr.s_addr;
1846 sin++;
1847 if (sin->sin_family != AF_INET)
1848 return -EINVAL;
1849 t->id.daddr.a4 = sin->sin_addr.s_addr;
1850 break;
1851#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1852 case AF_INET6:
2718aa7c 1853 sin6 = (struct sockaddr_in6*)sa;
1da177e4
LT		 1854 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1855 sin6++;
1856 if (sin6->sin6_family != AF_INET6)
1857 return -EINVAL;
1858 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1859 break;
1860#endif
1861 default:
1862 return -EINVAL;
1863 }
2718aa7c
MK		 1864 t->encap_family = sa->sa_family;
1865 } else
1866 t->encap_family = xp->family;
1867
1da177e4
LT		 1868 /* No way to set this via kame pfkey */
1869 t->aalgos = t->ealgos = t->calgos = ~0;
1870 xp->xfrm_nr++;
1871 return 0;
1872}
1873
1874static int
1875parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1876{
1877 int err;
1878 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1879 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1880
1881 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1882 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1883 return err;
1884 len -= rq->sadb_x_ipsecrequest_len;
1885 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1886 }
1887 return 0;
1888}
1889
df71837d
TJ		 1890static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1891{
1892 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1893
1894 if (xfrm_ctx) {
1895 int len = sizeof(struct sadb_x_sec_ctx);
1896 len += xfrm_ctx->ctx_len;
1897 return PFKEY_ALIGN8(len);
1898 }
1899 return 0;
1900}
1901
1da177e4
LT		 1902static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1903{
2718aa7c 1904 struct xfrm_tmpl *t;
1da177e4 1905 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 1906 int socklen = 0;
1907 int i;
1908
1909 for (i=0; i<xp->xfrm_nr; i++) {
1910 t = xp->xfrm_vec + i;
1911 socklen += (t->encap_family == AF_INET ?
1912 sizeof(struct sockaddr_in) :
1913 sizeof(struct sockaddr_in6));
1914 }
1da177e4
LT		 1915
1916 return sizeof(struct sadb_msg) +
1917 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 1918 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 1919 (sockaddr_size * 2) +
1920 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 1921 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1922 (socklen * 2) +
df71837d 1923 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 1924}
1925
1926static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1927{
1928 struct sk_buff *skb;
1929 int size;
1930
1931 size = pfkey_xfrm_policy2msg_size(xp);
1932
1933 skb = alloc_skb(size + 16, GFP_ATOMIC);
1934 if (skb == NULL)
1935 return ERR_PTR(-ENOBUFS);
1936
1937 return skb;
1938}
1939
55569ce2 1940static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1da177e4
LT		 1941{
1942 struct sadb_msg *hdr;
1943 struct sadb_address *addr;
1944 struct sadb_lifetime *lifetime;
1945 struct sadb_x_policy *pol;
1946 struct sockaddr_in *sin;
df71837d
TJ		 1947 struct sadb_x_sec_ctx *sec_ctx;
1948 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 1949#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1950 struct sockaddr_in6 *sin6;
1951#endif
1952 int i;
1953 int size;
1954 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1955 int socklen = (xp->family == AF_INET ?
1956 sizeof(struct sockaddr_in) :
1957 sizeof(struct sockaddr_in6));
1958
1959 size = pfkey_xfrm_policy2msg_size(xp);
1960
1961 /* call should fill header later */
1962 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1963 memset(hdr, 0, size); /* XXX do we need this ? */
1964
1965 /* src address */
8ff24541 1966 addr = (struct sadb_address*) skb_put(skb,
1da177e4 1967 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 1968 addr->sadb_address_len =
1da177e4
LT		 1969 (sizeof(struct sadb_address)+sockaddr_size)/
1970 sizeof(uint64_t);
1971 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1972 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1973 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1974 addr->sadb_address_reserved = 0;
1975 /* src address */
1976 if (xp->family == AF_INET) {
1977 sin = (struct sockaddr_in *) (addr + 1);
1978 sin->sin_family = AF_INET;
1979 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1980 sin->sin_port = xp->selector.sport;
1981 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1982 }
1983#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1984 else if (xp->family == AF_INET6) {
1985 sin6 = (struct sockaddr_in6 *) (addr + 1);
1986 sin6->sin6_family = AF_INET6;
1987 sin6->sin6_port = xp->selector.sport;
1988 sin6->sin6_flowinfo = 0;
1989 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1990 sizeof(struct in6_addr));
1991 sin6->sin6_scope_id = 0;
1992 }
1993#endif
1994 else
1995 BUG();
1996
1997 /* dst address */
8ff24541 1998 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 1999 sizeof(struct sadb_address)+sockaddr_size);
2000 addr->sadb_address_len =
2001 (sizeof(struct sadb_address)+sockaddr_size)/
2002 sizeof(uint64_t);
2003 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2004 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2005 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4
LT		 2006 addr->sadb_address_reserved = 0;
2007 if (xp->family == AF_INET) {
2008 sin = (struct sockaddr_in *) (addr + 1);
2009 sin->sin_family = AF_INET;
2010 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2011 sin->sin_port = xp->selector.dport;
2012 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2013 }
2014#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2015 else if (xp->family == AF_INET6) {
2016 sin6 = (struct sockaddr_in6 *) (addr + 1);
2017 sin6->sin6_family = AF_INET6;
2018 sin6->sin6_port = xp->selector.dport;
2019 sin6->sin6_flowinfo = 0;
2020 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2021 sizeof(struct in6_addr));
2022 sin6->sin6_scope_id = 0;
2023 }
2024#endif
2025 else
2026 BUG();
2027
2028 /* hard time */
8ff24541 2029 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2030 sizeof(struct sadb_lifetime));
2031 lifetime->sadb_lifetime_len =
2032 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2033 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2034 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2035 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2036 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2037 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2038 /* soft time */
8ff24541 2039 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2040 sizeof(struct sadb_lifetime));
2041 lifetime->sadb_lifetime_len =
2042 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2043 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2044 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2045 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2046 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2047 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2048 /* current time */
8ff24541 2049 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2050 sizeof(struct sadb_lifetime));
2051 lifetime->sadb_lifetime_len =
2052 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2053 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2054 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2055 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2056 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2057 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2058
2059 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2060 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2061 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2062 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2063 if (xp->action == XFRM_POLICY_ALLOW) {
2064 if (xp->xfrm_nr)
2065 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2066 else
2067 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2068 }
2069 pol->sadb_x_policy_dir = dir+1;
2070 pol->sadb_x_policy_id = xp->index;
2071 pol->sadb_x_policy_priority = xp->priority;
2072
2073 for (i=0; i<xp->xfrm_nr; i++) {
2074 struct sadb_x_ipsecrequest *rq;
2075 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2076 int req_size;
55569ce2 2077 int mode;
1da177e4
LT		 2078
2079 req_size = sizeof(struct sadb_x_ipsecrequest);
7e49e6de 2080 if (t->mode == XFRM_MODE_TUNNEL)
2718aa7c 2081 req_size += ((t->encap_family == AF_INET ?
8ff24541
YH		 2082 sizeof(struct sockaddr_in) :
2083 sizeof(struct sockaddr_in6)) * 2);
1da177e4
LT		 2084 else
2085 size -= 2*socklen;
2086 rq = (void*)skb_put(skb, req_size);
2087 pol->sadb_x_policy_len += req_size/8;
2088 memset(rq, 0, sizeof(*rq));
2089 rq->sadb_x_ipsecrequest_len = req_size;
2090 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2091 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2092 return -EINVAL;
fefaa75e 2093 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2094 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2095 if (t->reqid)
2096 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2097 if (t->optional)
2098 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2099 rq->sadb_x_ipsecrequest_reqid = t->reqid;
7e49e6de 2100 if (t->mode == XFRM_MODE_TUNNEL) {
2718aa7c 2101 switch (t->encap_family) {
1da177e4
LT		 2102 case AF_INET:
2103 sin = (void*)(rq+1);
2104 sin->sin_family = AF_INET;
2105 sin->sin_addr.s_addr = t->saddr.a4;
2106 sin->sin_port = 0;
2107 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2108 sin++;
2109 sin->sin_family = AF_INET;
2110 sin->sin_addr.s_addr = t->id.daddr.a4;
2111 sin->sin_port = 0;
2112 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2113 break;
2114#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2115 case AF_INET6:
2116 sin6 = (void*)(rq+1);
2117 sin6->sin6_family = AF_INET6;
2118 sin6->sin6_port = 0;
2119 sin6->sin6_flowinfo = 0;
2120 memcpy(&sin6->sin6_addr, t->saddr.a6,
2121 sizeof(struct in6_addr));
2122 sin6->sin6_scope_id = 0;
2123
2124 sin6++;
2125 sin6->sin6_family = AF_INET6;
2126 sin6->sin6_port = 0;
2127 sin6->sin6_flowinfo = 0;
2128 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2129 sizeof(struct in6_addr));
2130 sin6->sin6_scope_id = 0;
2131 break;
2132#endif
2133 default:
2134 break;
2135 }
2136 }
2137 }
df71837d
TJ		 2138
2139 /* security context */
2140 if ((xfrm_ctx = xp->security)) {
2141 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2142
2143 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2144 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2145 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2146 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2147 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2148 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2149 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2150 xfrm_ctx->ctx_len);
2151 }
2152
1da177e4
LT		 2153 hdr->sadb_msg_len = size / sizeof(uint64_t);
2154 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
55569ce2
KM		 2155
2156 return 0;
1da177e4
LT		 2157}
2158
26b15dad
JHS		 2159static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2160{
2161 struct sk_buff *out_skb;
2162 struct sadb_msg *out_hdr;
2163 int err;
2164
2165 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2166 if (IS_ERR(out_skb)) {
2167 err = PTR_ERR(out_skb);
2168 goto out;
2169 }
55569ce2
KM		 2170 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2171 if (err < 0)
2172 return err;
26b15dad
JHS		 2173
2174 out_hdr = (struct sadb_msg *) out_skb->data;
2175 out_hdr->sadb_msg_version = PF_KEY_V2;
2176
f60f6b8f 2177 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2178 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2179 else
2180 out_hdr->sadb_msg_type = event2poltype(c->event);
2181 out_hdr->sadb_msg_errno = 0;
2182 out_hdr->sadb_msg_seq = c->seq;
2183 out_hdr->sadb_msg_pid = c->pid;
2184 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2185out:
2186 return 0;
2187
2188}
2189
1da177e4
LT		 2190static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2191{
df71837d 2192 int err = 0;
1da177e4
LT		 2193 struct sadb_lifetime *lifetime;
2194 struct sadb_address *sa;
2195 struct sadb_x_policy *pol;
2196 struct xfrm_policy *xp;
26b15dad 2197 struct km_event c;
df71837d 2198 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2199
2200 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2201 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2202 !ext_hdrs[SADB_X_EXT_POLICY-1])
2203 return -EINVAL;
2204
2205 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2206 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2207 return -EINVAL;
2208 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2209 return -EINVAL;
2210
2211 xp = xfrm_policy_alloc(GFP_KERNEL);
2212 if (xp == NULL)
2213 return -ENOBUFS;
2214
2215 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2216 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2217 xp->priority = pol->sadb_x_policy_priority;
2218
8ff24541 2219 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2220 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2221 if (!xp->family) {
2222 err = -EINVAL;
2223 goto out;
2224 }
2225 xp->selector.family = xp->family;
2226 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2227 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2228 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2229 if (xp->selector.sport)
8f83f23e 2230 xp->selector.sport_mask = htons(0xffff);
1da177e4 2231
8ff24541 2232 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2233 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2234 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2235
2236 /* Amusing, we set this twice. KAME apps appear to set same value
2237 * in both addresses.
2238 */
2239 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2240
2241 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2242 if (xp->selector.dport)
8f83f23e 2243 xp->selector.dport_mask = htons(0xffff);
1da177e4 2244
df71837d
TJ		 2245 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2246 if (sec_ctx != NULL) {
2247 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2248
2249 if (!uctx) {
2250 err = -ENOBUFS;
2251 goto out;
2252 }
2253
2254 err = security_xfrm_policy_alloc(xp, uctx);
2255 kfree(uctx);
2256
2257 if (err)
2258 goto out;
2259 }
2260
1da177e4
LT		 2261 xp->lft.soft_byte_limit = XFRM_INF;
2262 xp->lft.hard_byte_limit = XFRM_INF;
2263 xp->lft.soft_packet_limit = XFRM_INF;
2264 xp->lft.hard_packet_limit = XFRM_INF;
2265 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2266 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2267 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2268 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2269 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2270 }
2271 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2272 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2273 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2274 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2275 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2276 }
2277 xp->xfrm_nr = 0;
2278 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2279 (err = parse_ipsecrequests(xp, pol)) < 0)
2280 goto out;
2281
1da177e4
LT		 2282 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2283 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2284
ab5f5e8b 2285 xfrm_audit_policy_add(xp, err ? 0 : 1,
0c11b942 2286 audit_get_loginuid(current), 0);
161a09e7 2287
df71837d
TJ		 2288 if (err)
2289 goto out;
1da177e4 2290
26b15dad 2291 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2292 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2293 else
f60f6b8f 2294 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2295
26b15dad
JHS		 2296 c.seq = hdr->sadb_msg_seq;
2297 c.pid = hdr->sadb_msg_pid;
1da177e4 2298
26b15dad
JHS		 2299 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2300 xfrm_pol_put(xp);
1da177e4
LT		 2301 return 0;
2302
2303out:
a4d6b8af 2304 xp->dead = 1;
64c31b3f 2305 xfrm_policy_destroy(xp);
1da177e4
LT		 2306 return err;
2307}
2308
2309static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2310{
2311 int err;
2312 struct sadb_address *sa;
2313 struct sadb_x_policy *pol;
df71837d 2314 struct xfrm_policy *xp, tmp;
1da177e4 2315 struct xfrm_selector sel;
26b15dad 2316 struct km_event c;
df71837d 2317 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2318
2319 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2320 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2321 !ext_hdrs[SADB_X_EXT_POLICY-1])
2322 return -EINVAL;
2323
2324 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2325 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2326 return -EINVAL;
2327
2328 memset(&sel, 0, sizeof(sel));
2329
8ff24541 2330 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2331 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2332 sel.prefixlen_s = sa->sadb_address_prefixlen;
2333 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2334 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2335 if (sel.sport)
8f83f23e 2336 sel.sport_mask = htons(0xffff);
1da177e4 2337
8ff24541 2338 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2339 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2340 sel.prefixlen_d = sa->sadb_address_prefixlen;
2341 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2342 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2343 if (sel.dport)
8f83f23e 2344 sel.dport_mask = htons(0xffff);
1da177e4 2345
df71837d
TJ		 2346 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2347 memset(&tmp, 0, sizeof(struct xfrm_policy));
2348
2349 if (sec_ctx != NULL) {
2350 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2351
2352 if (!uctx)
2353 return -ENOMEM;
2354
2355 err = security_xfrm_policy_alloc(&tmp, uctx);
2356 kfree(uctx);
2357
2358 if (err)
2359 return err;
2360 }
2361
f7b6983f 2362 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
ef41aaa0 2363 &sel, tmp.security, 1, &err);
df71837d 2364 security_xfrm_policy_free(&tmp);
161a09e7 2365
1da177e4
LT		 2366 if (xp == NULL)
2367 return -ENOENT;
2368
ab5f5e8b 2369 xfrm_audit_policy_delete(xp, err ? 0 : 1,
0c11b942 2370 audit_get_loginuid(current), 0);
13fcfbb0
DM		 2371
2372 if (err)
c8c05a8e 2373 goto out;
13fcfbb0 2374
26b15dad
JHS		 2375 c.seq = hdr->sadb_msg_seq;
2376 c.pid = hdr->sadb_msg_pid;
f60f6b8f 2377 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2378 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2379
c8c05a8e 2380out:
26b15dad
JHS		 2381 xfrm_pol_put(xp);
2382 return err;
2383}
2384
2385static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2386{
2387 int err;
2388 struct sk_buff *out_skb;
2389 struct sadb_msg *out_hdr;
2390 err = 0;
2391
1da177e4
LT		 2392 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2393 if (IS_ERR(out_skb)) {
2394 err = PTR_ERR(out_skb);
2395 goto out;
2396 }
55569ce2
KM		 2397 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2398 if (err < 0)
2399 goto out;
1da177e4
LT		 2400
2401 out_hdr = (struct sadb_msg *) out_skb->data;
2402 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2403 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2404 out_hdr->sadb_msg_satype = 0;
2405 out_hdr->sadb_msg_errno = 0;
2406 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2407 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
26b15dad 2408 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1da177e4
LT		 2409 err = 0;
2410
2411out:
1da177e4
LT		 2412 return err;
2413}
2414
08de61be
SS		 2415#ifdef CONFIG_NET_KEY_MIGRATE
2416static int pfkey_sockaddr_pair_size(sa_family_t family)
2417{
2418 switch (family) {
2419 case AF_INET:
2420 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2421#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2422 case AF_INET6:
2423 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2424#endif
2425 default:
2426 return 0;
2427 }
2428 /* NOTREACHED */
2429}
2430
2431static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2432 xfrm_address_t *saddr, xfrm_address_t *daddr,
2433 u16 *family)
2434{
2435 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2436 if (rq->sadb_x_ipsecrequest_len <
2437 pfkey_sockaddr_pair_size(sa->sa_family))
2438 return -EINVAL;
2439
2440 switch (sa->sa_family) {
2441 case AF_INET:
2442 {
2443 struct sockaddr_in *sin;
2444 sin = (struct sockaddr_in *)sa;
2445 if ((sin+1)->sin_family != AF_INET)
2446 return -EINVAL;
2447 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2448 sin++;
2449 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2450 *family = AF_INET;
2451 break;
2452 }
2453#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2454 case AF_INET6:
2455 {
2456 struct sockaddr_in6 *sin6;
2457 sin6 = (struct sockaddr_in6 *)sa;
2458 if ((sin6+1)->sin6_family != AF_INET6)
2459 return -EINVAL;
2460 memcpy(&saddr->a6, &sin6->sin6_addr,
2461 sizeof(saddr->a6));
2462 sin6++;
2463 memcpy(&daddr->a6, &sin6->sin6_addr,
2464 sizeof(daddr->a6));
2465 *family = AF_INET6;
2466 break;
2467 }
2468#endif
2469 default:
2470 return -EINVAL;
2471 }
2472
2473 return 0;
2474}
2475
2476static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2477 struct xfrm_migrate *m)
2478{
2479 int err;
2480 struct sadb_x_ipsecrequest *rq2;
55569ce2 2481 int mode;
08de61be
SS		 2482
2483 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2484 len < rq1->sadb_x_ipsecrequest_len)
2485 return -EINVAL;
2486
2487 /* old endoints */
2488 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2489 &m->old_family);
2490 if (err)
2491 return err;
2492
2493 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2494 len -= rq1->sadb_x_ipsecrequest_len;
2495
2496 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2497 len < rq2->sadb_x_ipsecrequest_len)
2498 return -EINVAL;
2499
2500 /* new endpoints */
2501 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2502 &m->new_family);
2503 if (err)
2504 return err;
2505
2506 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2507 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2508 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2509 return -EINVAL;
2510
2511 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2512 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2513 return -EINVAL;
2514 m->mode = mode;
08de61be
SS		 2515 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2516
2517 return ((int)(rq1->sadb_x_ipsecrequest_len +
2518 rq2->sadb_x_ipsecrequest_len));
2519}
2520
2521static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2522 struct sadb_msg *hdr, void **ext_hdrs)
2523{
2524 int i, len, ret, err = -EINVAL;
2525 u8 dir;
2526 struct sadb_address *sa;
2527 struct sadb_x_policy *pol;
2528 struct sadb_x_ipsecrequest *rq;
2529 struct xfrm_selector sel;
2530 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2531
2532 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2533 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2534 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2535 err = -EINVAL;
2536 goto out;
2537 }
2538
2539 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2540 if (!pol) {
2541 err = -EINVAL;
2542 goto out;
2543 }
2544
2545 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2546 err = -EINVAL;
2547 goto out;
2548 }
2549
2550 dir = pol->sadb_x_policy_dir - 1;
2551 memset(&sel, 0, sizeof(sel));
2552
2553 /* set source address info of selector */
2554 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2555 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2556 sel.prefixlen_s = sa->sadb_address_prefixlen;
2557 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2558 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2559 if (sel.sport)
582ee43d 2560 sel.sport_mask = htons(0xffff);
08de61be
SS		 2561
2562 /* set destination address info of selector */
2563 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2564 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2565 sel.prefixlen_d = sa->sadb_address_prefixlen;
2566 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2567 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2568 if (sel.dport)
582ee43d 2569 sel.dport_mask = htons(0xffff);
08de61be
SS		 2570
2571 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2572
2573 /* extract ipsecrequests */
2574 i = 0;
2575 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2576
2577 while (len > 0 && i < XFRM_MAX_DEPTH) {
2578 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2579 if (ret < 0) {
2580 err = ret;
2581 goto out;
2582 } else {
2583 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2584 len -= ret;
2585 i++;
2586 }
2587 }
2588
2589 if (!i || len > 0) {
2590 err = -EINVAL;
2591 goto out;
2592 }
2593
2594 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2595
2596 out:
2597 return err;
2598}
2599#else
2600static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2601 struct sadb_msg *hdr, void **ext_hdrs)
2602{
2603 return -ENOPROTOOPT;
2604}
2605#endif
2606
2607
1da177e4
LT		 2608static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2609{
77d8d7a6 2610 unsigned int dir;
215a2dd3 2611 int err = 0, delete;
1da177e4
LT		 2612 struct sadb_x_policy *pol;
2613 struct xfrm_policy *xp;
26b15dad 2614 struct km_event c;
1da177e4
LT		 2615
2616 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2617 return -EINVAL;
2618
77d8d7a6
HX		 2619 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2620 if (dir >= XFRM_POLICY_MAX)
2621 return -EINVAL;
2622
215a2dd3 2623 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
f7b6983f 2624 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
215a2dd3 2625 delete, &err);
1da177e4
LT		 2626 if (xp == NULL)
2627 return -ENOENT;
2628
215a2dd3 2629 if (delete) {
ab5f5e8b 2630 xfrm_audit_policy_delete(xp, err ? 0 : 1,
0c11b942 2631 audit_get_loginuid(current), 0);
1da177e4 2632
215a2dd3
EP		 2633 if (err)
2634 goto out;
2635 c.seq = hdr->sadb_msg_seq;
2636 c.pid = hdr->sadb_msg_pid;
bf08867f 2637 c.data.byid = 1;
f60f6b8f 2638 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2639 km_policy_notify(xp, dir, &c);
26b15dad 2640 } else {
77d8d7a6 2641 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2642 }
1da177e4 2643
215a2dd3 2644out:
1da177e4
LT		 2645 xfrm_pol_put(xp);
2646 return err;
2647}
2648
2649static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2650{
2651 struct pfkey_dump_data *data = ptr;
2652 struct sk_buff *out_skb;
2653 struct sadb_msg *out_hdr;
55569ce2 2654 int err;
1da177e4
LT		 2655
2656 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2657 if (IS_ERR(out_skb))
2658 return PTR_ERR(out_skb);
2659
55569ce2
KM		 2660 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2661 if (err < 0)
2662 return err;
1da177e4
LT		 2663
2664 out_hdr = (struct sadb_msg *) out_skb->data;
2665 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2666 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2667 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2668 out_hdr->sadb_msg_errno = 0;
2669 out_hdr->sadb_msg_seq = count;
2670 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2671 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2672 return 0;
2673}
2674
2675static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2676{
2677 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
4c563f76
TT		 2678 struct xfrm_policy_walk walk;
2679 int rc;
2680
2681 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
2682 rc = xfrm_policy_walk(&walk, dump_sp, &data);
2683 xfrm_policy_walk_done(&walk);
1da177e4 2684
4c563f76 2685 return rc;
1da177e4
LT		 2686}
2687
26b15dad 2688static int key_notify_policy_flush(struct km_event *c)
1da177e4
LT		 2689{
2690 struct sk_buff *skb_out;
26b15dad 2691 struct sadb_msg *hdr;
1da177e4 2692
26b15dad 2693 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2694 if (!skb_out)
2695 return -ENOBUFS;
26b15dad 2696 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2697 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad
JHS		 2698 hdr->sadb_msg_seq = c->seq;
2699 hdr->sadb_msg_pid = c->pid;
2700 hdr->sadb_msg_version = PF_KEY_V2;
2701 hdr->sadb_msg_errno = (uint8_t) 0;
2702 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2703 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2704 return 0;
1da177e4 2705
26b15dad
JHS		 2706}
2707
2708static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2709{
2710 struct km_event c;
161a09e7 2711 struct xfrm_audit audit_info;
4aa2e62c 2712 int err;
1da177e4 2713
0c11b942 2714 audit_info.loginuid = audit_get_loginuid(current);
161a09e7 2715 audit_info.secid = 0;
4aa2e62c
JL		 2716 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2717 if (err)
2718 return err;
f7b6983f 2719 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2720 c.event = XFRM_MSG_FLUSHPOLICY;
26b15dad
JHS		 2721 c.pid = hdr->sadb_msg_pid;
2722 c.seq = hdr->sadb_msg_seq;
2723 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2724
2725 return 0;
2726}
2727
2728typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2729 struct sadb_msg *hdr, void **ext_hdrs);
2730static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2731 [SADB_RESERVED] = pfkey_reserved,
2732 [SADB_GETSPI] = pfkey_getspi,
2733 [SADB_UPDATE] = pfkey_add,
2734 [SADB_ADD] = pfkey_add,
2735 [SADB_DELETE] = pfkey_delete,
2736 [SADB_GET] = pfkey_get,
2737 [SADB_ACQUIRE] = pfkey_acquire,
2738 [SADB_REGISTER] = pfkey_register,
2739 [SADB_EXPIRE] = NULL,
2740 [SADB_FLUSH] = pfkey_flush,
2741 [SADB_DUMP] = pfkey_dump,
2742 [SADB_X_PROMISC] = pfkey_promisc,
2743 [SADB_X_PCHANGE] = NULL,
2744 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2745 [SADB_X_SPDADD] = pfkey_spdadd,
2746 [SADB_X_SPDDELETE] = pfkey_spddelete,
2747 [SADB_X_SPDGET] = pfkey_spdget,
2748 [SADB_X_SPDACQUIRE] = NULL,
2749 [SADB_X_SPDDUMP] = pfkey_spddump,
2750 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2751 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2752 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2753 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2754};
2755
2756static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2757{
2758 void *ext_hdrs[SADB_EXT_MAX];
2759 int err;
2760
2761 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2762 BROADCAST_PROMISC_ONLY, NULL);
2763
2764 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2765 err = parse_exthdrs(skb, hdr, ext_hdrs);
2766 if (!err) {
2767 err = -EOPNOTSUPP;
2768 if (pfkey_funcs[hdr->sadb_msg_type])
2769 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2770 }
2771 return err;
2772}
2773
2774static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2775{
2776 struct sadb_msg *hdr = NULL;
2777
2778 if (skb->len < sizeof(*hdr)) {
2779 *errp = -EMSGSIZE;
2780 } else {
2781 hdr = (struct sadb_msg *) skb->data;
2782 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2783 hdr->sadb_msg_reserved != 0 ||
2784 (hdr->sadb_msg_type <= SADB_RESERVED ||
2785 hdr->sadb_msg_type > SADB_MAX)) {
2786 hdr = NULL;
2787 *errp = -EINVAL;
2788 } else if (hdr->sadb_msg_len != (skb->len /
2789 sizeof(uint64_t)) ||
2790 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2791 sizeof(uint64_t))) {
2792 hdr = NULL;
2793 *errp = -EMSGSIZE;
2794 } else {
2795 *errp = 0;
2796 }
2797 }
2798 return hdr;
2799}
2800
2801static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2802{
f398035f
HX		 2803 unsigned int id = d->desc.sadb_alg_id;
2804
2805 if (id >= sizeof(t->aalgos) * 8)
2806 return 0;
2807
2808 return (t->aalgos >> id) & 1;
1da177e4
LT		 2809}
2810
2811static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2812{
f398035f
HX		 2813 unsigned int id = d->desc.sadb_alg_id;
2814
2815 if (id >= sizeof(t->ealgos) * 8)
2816 return 0;
2817
2818 return (t->ealgos >> id) & 1;
1da177e4
LT		 2819}
2820
2821static int count_ah_combs(struct xfrm_tmpl *t)
2822{
2823 int i, sz = 0;
2824
2825 for (i = 0; ; i++) {
2826 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2827 if (!aalg)
2828 break;
2829 if (aalg_tmpl_set(t, aalg) && aalg->available)
2830 sz += sizeof(struct sadb_comb);
2831 }
2832 return sz + sizeof(struct sadb_prop);
2833}
2834
2835static int count_esp_combs(struct xfrm_tmpl *t)
2836{
2837 int i, k, sz = 0;
2838
2839 for (i = 0; ; i++) {
2840 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2841 if (!ealg)
2842 break;
8ff24541 2843
1da177e4
LT		 2844 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2845 continue;
8ff24541 2846
1da177e4
LT		 2847 for (k = 1; ; k++) {
2848 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2849 if (!aalg)
2850 break;
8ff24541 2851
1da177e4
LT		 2852 if (aalg_tmpl_set(t, aalg) && aalg->available)
2853 sz += sizeof(struct sadb_comb);
2854 }
2855 }
2856 return sz + sizeof(struct sadb_prop);
2857}
2858
2859static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2860{
2861 struct sadb_prop *p;
2862 int i;
2863
2864 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2865 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2866 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2867 p->sadb_prop_replay = 32;
2868 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2869
2870 for (i = 0; ; i++) {
2871 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2872 if (!aalg)
2873 break;
2874
2875 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2876 struct sadb_comb *c;
2877 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2878 memset(c, 0, sizeof(*c));
2879 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2880 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2881 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2882 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2883 c->sadb_comb_hard_addtime = 24*60*60;
2884 c->sadb_comb_soft_addtime = 20*60*60;
2885 c->sadb_comb_hard_usetime = 8*60*60;
2886 c->sadb_comb_soft_usetime = 7*60*60;
2887 }
2888 }
2889}
2890
2891static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2892{
2893 struct sadb_prop *p;
2894 int i, k;
2895
2896 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2897 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2898 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2899 p->sadb_prop_replay = 32;
2900 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2901
2902 for (i=0; ; i++) {
2903 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2904 if (!ealg)
2905 break;
8ff24541 2906
1da177e4
LT		 2907 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2908 continue;
8ff24541 2909
1da177e4
LT		 2910 for (k = 1; ; k++) {
2911 struct sadb_comb *c;
2912 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2913 if (!aalg)
2914 break;
2915 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2916 continue;
2917 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2918 memset(c, 0, sizeof(*c));
2919 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2920 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2921 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2922 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2923 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2924 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2925 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2926 c->sadb_comb_hard_addtime = 24*60*60;
2927 c->sadb_comb_soft_addtime = 20*60*60;
2928 c->sadb_comb_hard_usetime = 8*60*60;
2929 c->sadb_comb_soft_usetime = 7*60*60;
2930 }
2931 }
2932}
2933
26b15dad
JHS		 2934static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2935{
2936 return 0;
2937}
2938
2939static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2940{
2941 struct sk_buff *out_skb;
2942 struct sadb_msg *out_hdr;
26b15dad
JHS		 2943 int hard;
2944 int hsc;
2945
bf08867f 2946 hard = c->data.hard;
26b15dad
JHS		 2947 if (hard)
2948 hsc = 2;
2949 else
2950 hsc = 1;
1da177e4 2951
050f009e 2952 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 2953 if (IS_ERR(out_skb))
2954 return PTR_ERR(out_skb);
2955
2956 out_hdr = (struct sadb_msg *) out_skb->data;
2957 out_hdr->sadb_msg_version = PF_KEY_V2;
2958 out_hdr->sadb_msg_type = SADB_EXPIRE;
2959 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2960 out_hdr->sadb_msg_errno = 0;
2961 out_hdr->sadb_msg_reserved = 0;
2962 out_hdr->sadb_msg_seq = 0;
2963 out_hdr->sadb_msg_pid = 0;
2964
2965 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2966 return 0;
2967}
2968
26b15dad
JHS		 2969static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2970{
2971 switch (c->event) {
f60f6b8f 2972 case XFRM_MSG_EXPIRE:
26b15dad 2973 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 2974 case XFRM_MSG_DELSA:
2975 case XFRM_MSG_NEWSA:
2976 case XFRM_MSG_UPDSA:
26b15dad 2977 return key_notify_sa(x, c);
f60f6b8f 2978 case XFRM_MSG_FLUSHSA:
26b15dad 2979 return key_notify_sa_flush(c);
d51d081d
JHS		 2980 case XFRM_MSG_NEWAE: /* not yet supported */
2981 break;
26b15dad
JHS		 2982 default:
2983 printk("pfkey: Unknown SA event %d\n", c->event);
2984 break;
2985 }
2986
2987 return 0;
2988}
2989
2990static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2991{
f7b6983f
MN		 2992 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2993 return 0;
2994
26b15dad 2995 switch (c->event) {
f60f6b8f 2996 case XFRM_MSG_POLEXPIRE:
26b15dad 2997 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 2998 case XFRM_MSG_DELPOLICY:
2999 case XFRM_MSG_NEWPOLICY:
3000 case XFRM_MSG_UPDPOLICY:
26b15dad 3001 return key_notify_policy(xp, dir, c);
f60f6b8f 3002 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 3003 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3004 break;
26b15dad
JHS		 3005 return key_notify_policy_flush(c);
3006 default:
3007 printk("pfkey: Unknown policy event %d\n", c->event);
3008 break;
3009 }
3010
3011 return 0;
3012}
3013
1da177e4
LT		 3014static u32 get_acqseq(void)
3015{
3016 u32 res;
3017 static u32 acqseq;
3018 static DEFINE_SPINLOCK(acqseq_lock);
3019
3020 spin_lock_bh(&acqseq_lock);
3021 res = (++acqseq ? : ++acqseq);
3022 spin_unlock_bh(&acqseq_lock);
3023 return res;
3024}
3025
3026static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3027{
3028 struct sk_buff *skb;
3029 struct sadb_msg *hdr;
3030 struct sadb_address *addr;
3031 struct sadb_x_policy *pol;
3032 struct sockaddr_in *sin;
3033#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3034 struct sockaddr_in6 *sin6;
3035#endif
3036 int sockaddr_size;
3037 int size;
4e2ba18e
VY		 3038 struct sadb_x_sec_ctx *sec_ctx;
3039 struct xfrm_sec_ctx *xfrm_ctx;
3040 int ctx_size = 0;
8ff24541 3041
1da177e4
LT		 3042 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3043 if (!sockaddr_size)
3044 return -EINVAL;
3045
3046 size = sizeof(struct sadb_msg) +
3047 (sizeof(struct sadb_address) * 2) +
3048 (sockaddr_size * 2) +
3049 sizeof(struct sadb_x_policy);
8ff24541 3050
1da177e4
LT		 3051 if (x->id.proto == IPPROTO_AH)
3052 size += count_ah_combs(t);
3053 else if (x->id.proto == IPPROTO_ESP)
3054 size += count_esp_combs(t);
3055
4e2ba18e
VY		 3056 if ((xfrm_ctx = x->security)) {
3057 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3058 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3059 }
3060
1da177e4
LT		 3061 skb = alloc_skb(size + 16, GFP_ATOMIC);
3062 if (skb == NULL)
3063 return -ENOMEM;
8ff24541 3064
1da177e4
LT		 3065 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3066 hdr->sadb_msg_version = PF_KEY_V2;
3067 hdr->sadb_msg_type = SADB_ACQUIRE;
3068 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3069 hdr->sadb_msg_len = size / sizeof(uint64_t);
3070 hdr->sadb_msg_errno = 0;
3071 hdr->sadb_msg_reserved = 0;
3072 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3073 hdr->sadb_msg_pid = 0;
3074
3075 /* src address */
8ff24541 3076 addr = (struct sadb_address*) skb_put(skb,
1da177e4 3077 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3078 addr->sadb_address_len =
1da177e4
LT		 3079 (sizeof(struct sadb_address)+sockaddr_size)/
3080 sizeof(uint64_t);
3081 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3082 addr->sadb_address_proto = 0;
3083 addr->sadb_address_reserved = 0;
3084 if (x->props.family == AF_INET) {
3085 addr->sadb_address_prefixlen = 32;
3086
3087 sin = (struct sockaddr_in *) (addr + 1);
3088 sin->sin_family = AF_INET;
3089 sin->sin_addr.s_addr = x->props.saddr.a4;
3090 sin->sin_port = 0;
3091 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3092 }
3093#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3094 else if (x->props.family == AF_INET6) {
3095 addr->sadb_address_prefixlen = 128;
3096
3097 sin6 = (struct sockaddr_in6 *) (addr + 1);
3098 sin6->sin6_family = AF_INET6;
3099 sin6->sin6_port = 0;
3100 sin6->sin6_flowinfo = 0;
3101 memcpy(&sin6->sin6_addr,
3102 x->props.saddr.a6, sizeof(struct in6_addr));
3103 sin6->sin6_scope_id = 0;
3104 }
3105#endif
3106 else
3107 BUG();
8ff24541 3108
1da177e4 3109 /* dst address */
8ff24541 3110 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 3111 sizeof(struct sadb_address)+sockaddr_size);
3112 addr->sadb_address_len =
3113 (sizeof(struct sadb_address)+sockaddr_size)/
3114 sizeof(uint64_t);
3115 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3116 addr->sadb_address_proto = 0;
3117 addr->sadb_address_reserved = 0;
3118 if (x->props.family == AF_INET) {
8ff24541 3119 addr->sadb_address_prefixlen = 32;
1da177e4
LT		 3120
3121 sin = (struct sockaddr_in *) (addr + 1);
3122 sin->sin_family = AF_INET;
3123 sin->sin_addr.s_addr = x->id.daddr.a4;
3124 sin->sin_port = 0;
3125 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3126 }
3127#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3128 else if (x->props.family == AF_INET6) {
8ff24541 3129 addr->sadb_address_prefixlen = 128;
1da177e4
LT		 3130
3131 sin6 = (struct sockaddr_in6 *) (addr + 1);
3132 sin6->sin6_family = AF_INET6;
3133 sin6->sin6_port = 0;
3134 sin6->sin6_flowinfo = 0;
3135 memcpy(&sin6->sin6_addr,
3136 x->id.daddr.a6, sizeof(struct in6_addr));
3137 sin6->sin6_scope_id = 0;
3138 }
3139#endif
3140 else
3141 BUG();
3142
3143 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3144 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3145 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3146 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3147 pol->sadb_x_policy_dir = dir+1;
3148 pol->sadb_x_policy_id = xp->index;
3149
3150 /* Set sadb_comb's. */
3151 if (x->id.proto == IPPROTO_AH)
3152 dump_ah_combs(skb, t);
3153 else if (x->id.proto == IPPROTO_ESP)
3154 dump_esp_combs(skb, t);
3155
4e2ba18e
VY		 3156 /* security context */
3157 if (xfrm_ctx) {
3158 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3159 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3160 sec_ctx->sadb_x_sec_len =
3161 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3162 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3163 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3164 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3165 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3166 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3167 xfrm_ctx->ctx_len);
3168 }
3169
1da177e4
LT		 3170 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3171}
3172
cb969f07 3173static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3174 u8 *data, int len, int *dir)
1da177e4
LT		 3175{
3176 struct xfrm_policy *xp;
3177 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3178 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3179
cb969f07 3180 switch (sk->sk_family) {
1da177e4
LT		 3181 case AF_INET:
3182 if (opt != IP_IPSEC_POLICY) {
3183 *dir = -EOPNOTSUPP;
3184 return NULL;
3185 }
3186 break;
3187#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3188 case AF_INET6:
3189 if (opt != IPV6_IPSEC_POLICY) {
3190 *dir = -EOPNOTSUPP;
3191 return NULL;
3192 }
3193 break;
3194#endif
3195 default:
3196 *dir = -EINVAL;
3197 return NULL;
3198 }
3199
3200 *dir = -EINVAL;
3201
3202 if (len < sizeof(struct sadb_x_policy) ||
3203 pol->sadb_x_policy_len*8 > len ||
3204 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3205 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3206 return NULL;
3207
3208 xp = xfrm_policy_alloc(GFP_ATOMIC);
3209 if (xp == NULL) {
3210 *dir = -ENOBUFS;
3211 return NULL;
3212 }
3213
3214 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3215 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3216
3217 xp->lft.soft_byte_limit = XFRM_INF;
3218 xp->lft.hard_byte_limit = XFRM_INF;
3219 xp->lft.soft_packet_limit = XFRM_INF;
3220 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3221 xp->family = sk->sk_family;
1da177e4
LT		 3222
3223 xp->xfrm_nr = 0;
3224 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3225 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3226 goto out;
3227
df71837d
TJ		 3228 /* security context too */
3229 if (len >= (pol->sadb_x_policy_len*8 +
3230 sizeof(struct sadb_x_sec_ctx))) {
3231 char *p = (char *)pol;
3232 struct xfrm_user_sec_ctx *uctx;
3233
3234 p += pol->sadb_x_policy_len*8;
3235 sec_ctx = (struct sadb_x_sec_ctx *)p;
3236 if (len < pol->sadb_x_policy_len*8 +
cb969f07
VY		 3237 sec_ctx->sadb_x_sec_len) {
3238 *dir = -EINVAL;
df71837d 3239 goto out;
cb969f07 3240 }
df71837d
TJ		 3241 if ((*dir = verify_sec_ctx_len(p)))
3242 goto out;
3243 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3244 *dir = security_xfrm_policy_alloc(xp, uctx);
3245 kfree(uctx);
3246
3247 if (*dir)
3248 goto out;
3249 }
3250
1da177e4
LT		 3251 *dir = pol->sadb_x_policy_dir-1;
3252 return xp;
3253
3254out:
64c31b3f 3255 xfrm_policy_destroy(xp);
1da177e4
LT		 3256 return NULL;
3257}
3258
5d36b180 3259static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3260{
3261 struct sk_buff *skb;
3262 struct sadb_msg *hdr;
3263 struct sadb_sa *sa;
3264 struct sadb_address *addr;
3265 struct sadb_x_nat_t_port *n_port;
3266 struct sockaddr_in *sin;
3267#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3268 struct sockaddr_in6 *sin6;
3269#endif
3270 int sockaddr_size;
3271 int size;
3272 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3273 struct xfrm_encap_tmpl *natt = NULL;
3274
3275 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3276 if (!sockaddr_size)
3277 return -EINVAL;
3278
3279 if (!satype)
3280 return -EINVAL;
3281
3282 if (!x->encap)
3283 return -EINVAL;
3284
3285 natt = x->encap;
3286
3287 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3288 *
3289 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3290 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3291 */
8ff24541 3292
1da177e4
LT		 3293 size = sizeof(struct sadb_msg) +
3294 sizeof(struct sadb_sa) +
3295 (sizeof(struct sadb_address) * 2) +
3296 (sockaddr_size * 2) +
3297 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3298
1da177e4
LT		 3299 skb = alloc_skb(size + 16, GFP_ATOMIC);
3300 if (skb == NULL)
3301 return -ENOMEM;
8ff24541 3302
1da177e4
LT		 3303 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3304 hdr->sadb_msg_version = PF_KEY_V2;
3305 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3306 hdr->sadb_msg_satype = satype;
3307 hdr->sadb_msg_len = size / sizeof(uint64_t);
3308 hdr->sadb_msg_errno = 0;
3309 hdr->sadb_msg_reserved = 0;
3310 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3311 hdr->sadb_msg_pid = 0;
3312
3313 /* SA */
3314 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3315 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3316 sa->sadb_sa_exttype = SADB_EXT_SA;
3317 sa->sadb_sa_spi = x->id.spi;
3318 sa->sadb_sa_replay = 0;
3319 sa->sadb_sa_state = 0;
3320 sa->sadb_sa_auth = 0;
3321 sa->sadb_sa_encrypt = 0;
3322 sa->sadb_sa_flags = 0;
3323
3324 /* ADDRESS_SRC (old addr) */
3325 addr = (struct sadb_address*)
3326 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3327 addr->sadb_address_len =
1da177e4
LT		 3328 (sizeof(struct sadb_address)+sockaddr_size)/
3329 sizeof(uint64_t);
3330 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3331 addr->sadb_address_proto = 0;
3332 addr->sadb_address_reserved = 0;
3333 if (x->props.family == AF_INET) {
3334 addr->sadb_address_prefixlen = 32;
3335
3336 sin = (struct sockaddr_in *) (addr + 1);
3337 sin->sin_family = AF_INET;
3338 sin->sin_addr.s_addr = x->props.saddr.a4;
3339 sin->sin_port = 0;
3340 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3341 }
3342#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3343 else if (x->props.family == AF_INET6) {
3344 addr->sadb_address_prefixlen = 128;
3345
3346 sin6 = (struct sockaddr_in6 *) (addr + 1);
3347 sin6->sin6_family = AF_INET6;
3348 sin6->sin6_port = 0;
3349 sin6->sin6_flowinfo = 0;
3350 memcpy(&sin6->sin6_addr,
3351 x->props.saddr.a6, sizeof(struct in6_addr));
3352 sin6->sin6_scope_id = 0;
3353 }
3354#endif
3355 else
3356 BUG();
3357
3358 /* NAT_T_SPORT (old port) */
3359 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3360 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3361 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3362 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3363 n_port->sadb_x_nat_t_port_reserved = 0;
3364
3365 /* ADDRESS_DST (new addr) */
3366 addr = (struct sadb_address*)
3367 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3368 addr->sadb_address_len =
1da177e4
LT		 3369 (sizeof(struct sadb_address)+sockaddr_size)/
3370 sizeof(uint64_t);
3371 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3372 addr->sadb_address_proto = 0;
3373 addr->sadb_address_reserved = 0;
3374 if (x->props.family == AF_INET) {
3375 addr->sadb_address_prefixlen = 32;
3376
3377 sin = (struct sockaddr_in *) (addr + 1);
3378 sin->sin_family = AF_INET;
3379 sin->sin_addr.s_addr = ipaddr->a4;
3380 sin->sin_port = 0;
3381 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3382 }
3383#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3384 else if (x->props.family == AF_INET6) {
3385 addr->sadb_address_prefixlen = 128;
3386
3387 sin6 = (struct sockaddr_in6 *) (addr + 1);
3388 sin6->sin6_family = AF_INET6;
3389 sin6->sin6_port = 0;
3390 sin6->sin6_flowinfo = 0;
3391 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3392 sin6->sin6_scope_id = 0;
3393 }
3394#endif
3395 else
3396 BUG();
3397
3398 /* NAT_T_DPORT (new port) */
3399 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3400 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3401 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3402 n_port->sadb_x_nat_t_port_port = sport;
3403 n_port->sadb_x_nat_t_port_reserved = 0;
3404
3405 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3406}
3407
08de61be
SS		 3408#ifdef CONFIG_NET_KEY_MIGRATE
3409static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3410 struct xfrm_selector *sel)
3411{
3412 struct sadb_address *addr;
3413 struct sockaddr_in *sin;
3414#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3415 struct sockaddr_in6 *sin6;
3416#endif
3417 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3418 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3419 addr->sadb_address_exttype = type;
3420 addr->sadb_address_proto = sel->proto;
3421 addr->sadb_address_reserved = 0;
3422
3423 switch (type) {
3424 case SADB_EXT_ADDRESS_SRC:
3425 if (sel->family == AF_INET) {
3426 addr->sadb_address_prefixlen = sel->prefixlen_s;
3427 sin = (struct sockaddr_in *)(addr + 1);
3428 sin->sin_family = AF_INET;
3429 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3430 sizeof(sin->sin_addr.s_addr));
3431 sin->sin_port = 0;
3432 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3433 }
3434#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3435 else if (sel->family == AF_INET6) {
3436 addr->sadb_address_prefixlen = sel->prefixlen_s;
3437 sin6 = (struct sockaddr_in6 *)(addr + 1);
3438 sin6->sin6_family = AF_INET6;
3439 sin6->sin6_port = 0;
3440 sin6->sin6_flowinfo = 0;
3441 sin6->sin6_scope_id = 0;
3442 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3443 sizeof(sin6->sin6_addr.s6_addr));
3444 }
3445#endif
3446 break;
3447 case SADB_EXT_ADDRESS_DST:
3448 if (sel->family == AF_INET) {
3449 addr->sadb_address_prefixlen = sel->prefixlen_d;
3450 sin = (struct sockaddr_in *)(addr + 1);
3451 sin->sin_family = AF_INET;
3452 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3453 sizeof(sin->sin_addr.s_addr));
3454 sin->sin_port = 0;
3455 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3456 }
3457#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3458 else if (sel->family == AF_INET6) {
3459 addr->sadb_address_prefixlen = sel->prefixlen_d;
3460 sin6 = (struct sockaddr_in6 *)(addr + 1);
3461 sin6->sin6_family = AF_INET6;
3462 sin6->sin6_port = 0;
3463 sin6->sin6_flowinfo = 0;
3464 sin6->sin6_scope_id = 0;
3465 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3466 sizeof(sin6->sin6_addr.s6_addr));
3467 }
3468#endif
3469 break;
3470 default:
3471 return -EINVAL;
3472 }
3473
3474 return 0;
3475}
3476
3477static int set_ipsecrequest(struct sk_buff *skb,
3478 uint8_t proto, uint8_t mode, int level,
3479 uint32_t reqid, uint8_t family,
3480 xfrm_address_t *src, xfrm_address_t *dst)
3481{
3482 struct sadb_x_ipsecrequest *rq;
3483 struct sockaddr_in *sin;
3484#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3485 struct sockaddr_in6 *sin6;
3486#endif
3487 int size_req;
3488
3489 size_req = sizeof(struct sadb_x_ipsecrequest) +
3490 pfkey_sockaddr_pair_size(family);
3491
3492 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3493 memset(rq, 0, size_req);
3494 rq->sadb_x_ipsecrequest_len = size_req;
3495 rq->sadb_x_ipsecrequest_proto = proto;
3496 rq->sadb_x_ipsecrequest_mode = mode;
3497 rq->sadb_x_ipsecrequest_level = level;
3498 rq->sadb_x_ipsecrequest_reqid = reqid;
3499
3500 switch (family) {
3501 case AF_INET:
3502 sin = (struct sockaddr_in *)(rq + 1);
3503 sin->sin_family = AF_INET;
3504 memcpy(&sin->sin_addr.s_addr, src,
3505 sizeof(sin->sin_addr.s_addr));
3506 sin++;
3507 sin->sin_family = AF_INET;
3508 memcpy(&sin->sin_addr.s_addr, dst,
3509 sizeof(sin->sin_addr.s_addr));
3510 break;
3511#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3512 case AF_INET6:
3513 sin6 = (struct sockaddr_in6 *)(rq + 1);
3514 sin6->sin6_family = AF_INET6;
3515 sin6->sin6_port = 0;
3516 sin6->sin6_flowinfo = 0;
3517 sin6->sin6_scope_id = 0;
3518 memcpy(&sin6->sin6_addr.s6_addr, src,
3519 sizeof(sin6->sin6_addr.s6_addr));
3520 sin6++;
3521 sin6->sin6_family = AF_INET6;
3522 sin6->sin6_port = 0;
3523 sin6->sin6_flowinfo = 0;
3524 sin6->sin6_scope_id = 0;
3525 memcpy(&sin6->sin6_addr.s6_addr, dst,
3526 sizeof(sin6->sin6_addr.s6_addr));
3527 break;
3528#endif
3529 default:
3530 return -EINVAL;
3531 }
3532
3533 return 0;
3534}
3535#endif
3536
3537#ifdef CONFIG_NET_KEY_MIGRATE
3538static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3539 struct xfrm_migrate *m, int num_bundles)
3540{
3541 int i;
3542 int sasize_sel;
3543 int size = 0;
3544 int size_pol = 0;
3545 struct sk_buff *skb;
3546 struct sadb_msg *hdr;
3547 struct sadb_x_policy *pol;
3548 struct xfrm_migrate *mp;
3549
3550 if (type != XFRM_POLICY_TYPE_MAIN)
3551 return 0;
3552
3553 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3554 return -EINVAL;
3555
3556 /* selector */
3557 sasize_sel = pfkey_sockaddr_size(sel->family);
3558 if (!sasize_sel)
3559 return -EINVAL;
3560 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3561
3562 /* policy info */
3563 size_pol += sizeof(struct sadb_x_policy);
3564
3565 /* ipsecrequests */
3566 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3567 /* old locator pair */
3568 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3569 pfkey_sockaddr_pair_size(mp->old_family);
3570 /* new locator pair */
3571 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3572 pfkey_sockaddr_pair_size(mp->new_family);
3573 }
3574
3575 size += sizeof(struct sadb_msg) + size_pol;
3576
3577 /* alloc buffer */
3578 skb = alloc_skb(size, GFP_ATOMIC);
3579 if (skb == NULL)
3580 return -ENOMEM;
3581
3582 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3583 hdr->sadb_msg_version = PF_KEY_V2;
3584 hdr->sadb_msg_type = SADB_X_MIGRATE;
3585 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3586 hdr->sadb_msg_len = size / 8;
3587 hdr->sadb_msg_errno = 0;
3588 hdr->sadb_msg_reserved = 0;
3589 hdr->sadb_msg_seq = 0;
3590 hdr->sadb_msg_pid = 0;
3591
3592 /* selector src */
3593 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3594
3595 /* selector dst */
3596 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3597
3598 /* policy information */
3599 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3600 pol->sadb_x_policy_len = size_pol / 8;
3601 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3602 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3603 pol->sadb_x_policy_dir = dir + 1;
3604 pol->sadb_x_policy_id = 0;
3605 pol->sadb_x_policy_priority = 0;
3606
3607 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3608 /* old ipsecrequest */
55569ce2
KM		 3609 int mode = pfkey_mode_from_xfrm(mp->mode);
3610 if (mode < 0)
d4782c32 3611 goto err;
55569ce2 3612 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3613 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3614 mp->reqid, mp->old_family,
d4782c32
PM		 3615 &mp->old_saddr, &mp->old_daddr) < 0)
3616 goto err;
08de61be
SS		 3617
3618 /* new ipsecrequest */
55569ce2 3619 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3620 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3621 mp->reqid, mp->new_family,
d4782c32
PM		 3622 &mp->new_saddr, &mp->new_daddr) < 0)
3623 goto err;
08de61be
SS		 3624 }
3625
3626 /* broadcast migrate message to sockets */
3627 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3628
3629 return 0;
d4782c32
PM		 3630
3631err:
3632 kfree_skb(skb);
3633 return -EINVAL;
08de61be
SS		 3634}
3635#else
3636static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3637 struct xfrm_migrate *m, int num_bundles)
3638{
3639 return -ENOPROTOOPT;
3640}
3641#endif
3642
1da177e4
LT		 3643static int pfkey_sendmsg(struct kiocb *kiocb,
3644 struct socket *sock, struct msghdr *msg, size_t len)
3645{
3646 struct sock *sk = sock->sk;
3647 struct sk_buff *skb = NULL;
3648 struct sadb_msg *hdr = NULL;
3649 int err;
3650
3651 err = -EOPNOTSUPP;
3652 if (msg->msg_flags & MSG_OOB)
3653 goto out;
3654
3655 err = -EMSGSIZE;
3656 if ((unsigned)len > sk->sk_sndbuf - 32)
3657 goto out;
3658
3659 err = -ENOBUFS;
3660 skb = alloc_skb(len, GFP_KERNEL);
3661 if (skb == NULL)
3662 goto out;
3663
3664 err = -EFAULT;
3665 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3666 goto out;
3667
3668 hdr = pfkey_get_base_msg(skb, &err);
3669 if (!hdr)
3670 goto out;
3671
4a3e2f71 3672 mutex_lock(&xfrm_cfg_mutex);
1da177e4 3673 err = pfkey_process(sk, skb, hdr);
4a3e2f71 3674 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 3675
3676out:
3677 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3678 err = 0;
3679 if (skb)
3680 kfree_skb(skb);
3681
3682 return err ? : len;
3683}
3684
3685static int pfkey_recvmsg(struct kiocb *kiocb,
3686 struct socket *sock, struct msghdr *msg, size_t len,
3687 int flags)
3688{
3689 struct sock *sk = sock->sk;
3690 struct sk_buff *skb;
3691 int copied, err;
3692
3693 err = -EINVAL;
3694 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3695 goto out;
3696
3697 msg->msg_namelen = 0;
3698 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3699 if (skb == NULL)
3700 goto out;
3701
3702 copied = skb->len;
3703 if (copied > len) {
3704 msg->msg_flags |= MSG_TRUNC;
3705 copied = len;
3706 }
3707
badff6d0 3708 skb_reset_transport_header(skb);
1da177e4
LT		 3709 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3710 if (err)
3711 goto out_free;
3712
3713 sock_recv_timestamp(msg, sk, skb);
3714
3715 err = (flags & MSG_TRUNC) ? skb->len : copied;
3716
3717out_free:
3718 skb_free_datagram(sk, skb);
3719out:
3720 return err;
3721}
3722
90ddc4f0 3723static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3724 .family = PF_KEY,
3725 .owner = THIS_MODULE,
3726 /* Operations that make no sense on pfkey sockets. */
3727 .bind = sock_no_bind,
3728 .connect = sock_no_connect,
3729 .socketpair = sock_no_socketpair,
3730 .accept = sock_no_accept,
3731 .getname = sock_no_getname,
3732 .ioctl = sock_no_ioctl,
3733 .listen = sock_no_listen,
3734 .shutdown = sock_no_shutdown,
3735 .setsockopt = sock_no_setsockopt,
3736 .getsockopt = sock_no_getsockopt,
3737 .mmap = sock_no_mmap,
3738 .sendpage = sock_no_sendpage,
3739
3740 /* Now the operations that really occur. */
3741 .release = pfkey_release,
3742 .poll = datagram_poll,
3743 .sendmsg = pfkey_sendmsg,
3744 .recvmsg = pfkey_recvmsg,
3745};
3746
3747static struct net_proto_family pfkey_family_ops = {
3748 .family = PF_KEY,
3749 .create = pfkey_create,
3750 .owner = THIS_MODULE,
3751};
3752
3753#ifdef CONFIG_PROC_FS
bd2f7476 3754static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3755{
1da177e4 3756 struct sock *s;
1da177e4 3757
bd2f7476
PE		 3758 s = (struct sock *)v;
3759 if (v == SEQ_START_TOKEN)
3760 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3761 else
3762 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4
LT		 3763 s,
3764 atomic_read(&s->sk_refcnt),
3765 atomic_read(&s->sk_rmem_alloc),
3766 atomic_read(&s->sk_wmem_alloc),
3767 sock_i_uid(s),
3768 sock_i_ino(s)
3769 );
bd2f7476
PE		 3770 return 0;
3771}
3772
3773static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3774{
3775 struct sock *s;
3776 struct hlist_node *node;
3777 loff_t pos = *ppos;
1da177e4 3778
bd2f7476
PE		 3779 read_lock(&pfkey_table_lock);
3780 if (pos == 0)
3781 return SEQ_START_TOKEN;
8ff24541 3782
bd2f7476
PE		 3783 sk_for_each(s, node, &pfkey_table)
3784 if (pos-- == 1)
3785 return s;
1da177e4 3786
bd2f7476
PE		 3787 return NULL;
3788}
3789
3790static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3791{
3792 ++*ppos;
3793 return (v == SEQ_START_TOKEN) ?
3794 sk_head(&pfkey_table) :
3795 sk_next((struct sock *)v);
3796}
1da177e4 3797
bd2f7476
PE		 3798static void pfkey_seq_stop(struct seq_file *f, void *v)
3799{
3800 read_unlock(&pfkey_table_lock);
3801}
1da177e4 3802
bd2f7476
PE		 3803static struct seq_operations pfkey_seq_ops = {
3804 .start = pfkey_seq_start,
3805 .next = pfkey_seq_next,
3806 .stop = pfkey_seq_stop,
3807 .show = pfkey_seq_show,
3808};
1da177e4 3809
bd2f7476
PE		 3810static int pfkey_seq_open(struct inode *inode, struct file *file)
3811{
3812 return seq_open(file, &pfkey_seq_ops);
1da177e4 3813}
61145aa1 3814
bd2f7476
PE		 3815static struct file_operations pfkey_proc_ops = {
3816 .open = pfkey_seq_open,
3817 .read = seq_read,
3818 .llseek = seq_lseek,
3819 .release = seq_release,
3820};
3821
61145aa1
PE		 3822static int pfkey_init_proc(void)
3823{
bd2f7476
PE		 3824 struct proc_dir_entry *e;
3825
d9595a7b 3826 e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops);
bd2f7476 3827 if (e == NULL)
61145aa1 3828 return -ENOMEM;
bd2f7476 3829
bd2f7476 3830 return 0;
61145aa1
PE		 3831}
3832
3833static void pfkey_exit_proc(void)
3834{
d9595a7b 3835 proc_net_remove(&init_net, "pfkey");
61145aa1
PE		 3836}
3837#else
3838static inline int pfkey_init_proc(void)
3839{
3840 return 0;
3841}
3842
3843static inline void pfkey_exit_proc(void)
3844{
3845}
1da177e4
LT		 3846#endif
3847
3848static struct xfrm_mgr pfkeyv2_mgr =
3849{
3850 .id = "pfkeyv2",
3851 .notify = pfkey_send_notify,
3852 .acquire = pfkey_send_acquire,
3853 .compile_policy = pfkey_compile_policy,
3854 .new_mapping = pfkey_send_new_mapping,
26b15dad 3855 .notify_policy = pfkey_send_policy_notify,
08de61be 3856 .migrate = pfkey_send_migrate,
1da177e4
LT		 3857};
3858
3859static void __exit ipsec_pfkey_exit(void)
3860{
3861 xfrm_unregister_km(&pfkeyv2_mgr);
61145aa1 3862 pfkey_exit_proc();
1da177e4
LT		 3863 sock_unregister(PF_KEY);
3864 proto_unregister(&key_proto);
3865}
3866
3867static int __init ipsec_pfkey_init(void)
3868{
3869 int err = proto_register(&key_proto, 0);
3870
3871 if (err != 0)
3872 goto out;
3873
3874 err = sock_register(&pfkey_family_ops);
3875 if (err != 0)
3876 goto out_unregister_key_proto;
61145aa1
PE		 3877 err = pfkey_init_proc();
3878 if (err != 0)
1da177e4 3879 goto out_sock_unregister;
1da177e4
LT		 3880 err = xfrm_register_km(&pfkeyv2_mgr);
3881 if (err != 0)
3882 goto out_remove_proc_entry;
3883out:
3884 return err;
3885out_remove_proc_entry:
61145aa1 3886 pfkey_exit_proc();
1da177e4 3887out_sock_unregister:
1da177e4
LT		 3888 sock_unregister(PF_KEY);
3889out_unregister_key_proto:
3890 proto_unregister(&key_proto);
3891 goto out;
3892}
3893
3894module_init(ipsec_pfkey_init);
3895module_exit(ipsec_pfkey_exit);
3896MODULE_LICENSE("GPL");
3897MODULE_ALIAS_NETPROTO(PF_KEY);
kernel source for telekom puls (alcatel/mediatek)