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[IPV4] ARP: Remove not used code
[mirror_ubuntu-zesty-kernel.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
JL		 1468 xfrm_audit_state_add(x, err ? 0 : 1,
1469 audit_get_loginuid(current->audit_context), 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
JL		 1522 xfrm_audit_state_delete(x, err ? 0 : 1,
1523 audit_get_loginuid(current->audit_context), 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
161a09e7
JL		 1698 audit_info.loginuid = audit_get_loginuid(current->audit_context);
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 };
1745
1746 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1747 if (proto == 0)
1748 return -EINVAL;
1749
1750 return xfrm_state_walk(proto, dump_sa, &data);
1751}
1752
1753static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1754{
1755 struct pfkey_sock *pfk = pfkey_sk(sk);
1756 int satype = hdr->sadb_msg_satype;
1757
1758 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1759 /* XXX we mangle packet... */
1760 hdr->sadb_msg_errno = 0;
1761 if (satype != 0 && satype != 1)
1762 return -EINVAL;
1763 pfk->promisc = satype;
1764 }
1765 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1766 return 0;
1767}
1768
1769static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1770{
1771 int i;
1772 u32 reqid = *(u32*)ptr;
1773
1774 for (i=0; i<xp->xfrm_nr; i++) {
1775 if (xp->xfrm_vec[i].reqid == reqid)
1776 return -EEXIST;
1777 }
1778 return 0;
1779}
1780
1781static u32 gen_reqid(void)
1782{
1783 u32 start;
1784 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1785
1786 start = reqid;
1787 do {
1788 ++reqid;
1789 if (reqid == 0)
1790 reqid = IPSEC_MANUAL_REQID_MAX+1;
f7b6983f
MN		 1791 if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid,
1792 (void*)&reqid) != -EEXIST)
1da177e4
LT		 1793 return reqid;
1794 } while (reqid != start);
1795 return 0;
1796}
1797
1798static int
1799parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1800{
1801 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1802 struct sockaddr_in *sin;
1803#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1804 struct sockaddr_in6 *sin6;
1805#endif
55569ce2 1806 int mode;
1da177e4
LT		 1807
1808 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1809 return -ELOOP;
1810
1811 if (rq->sadb_x_ipsecrequest_mode == 0)
1812 return -EINVAL;
1813
1814 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1815 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1816 return -EINVAL;
1817 t->mode = mode;
1da177e4
LT		 1818 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1819 t->optional = 1;
1820 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1821 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1822 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1823 t->reqid = 0;
1824 if (!t->reqid && !(t->reqid = gen_reqid()))
1825 return -ENOBUFS;
1826 }
1827
1828 /* addresses present only in tunnel mode */
7e49e6de 1829 if (t->mode == XFRM_MODE_TUNNEL) {
2718aa7c
MK		 1830 struct sockaddr *sa;
1831 sa = (struct sockaddr *)(rq+1);
1832 switch(sa->sa_family) {
1da177e4 1833 case AF_INET:
2718aa7c 1834 sin = (struct sockaddr_in*)sa;
1da177e4
LT		 1835 t->saddr.a4 = sin->sin_addr.s_addr;
1836 sin++;
1837 if (sin->sin_family != AF_INET)
1838 return -EINVAL;
1839 t->id.daddr.a4 = sin->sin_addr.s_addr;
1840 break;
1841#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1842 case AF_INET6:
2718aa7c 1843 sin6 = (struct sockaddr_in6*)sa;
1da177e4
LT		 1844 memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1845 sin6++;
1846 if (sin6->sin6_family != AF_INET6)
1847 return -EINVAL;
1848 memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
1849 break;
1850#endif
1851 default:
1852 return -EINVAL;
1853 }
2718aa7c
MK		 1854 t->encap_family = sa->sa_family;
1855 } else
1856 t->encap_family = xp->family;
1857
1da177e4
LT		 1858 /* No way to set this via kame pfkey */
1859 t->aalgos = t->ealgos = t->calgos = ~0;
1860 xp->xfrm_nr++;
1861 return 0;
1862}
1863
1864static int
1865parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1866{
1867 int err;
1868 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1869 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1870
1871 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1872 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1873 return err;
1874 len -= rq->sadb_x_ipsecrequest_len;
1875 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1876 }
1877 return 0;
1878}
1879
df71837d
TJ		 1880static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1881{
1882 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1883
1884 if (xfrm_ctx) {
1885 int len = sizeof(struct sadb_x_sec_ctx);
1886 len += xfrm_ctx->ctx_len;
1887 return PFKEY_ALIGN8(len);
1888 }
1889 return 0;
1890}
1891
1da177e4
LT		 1892static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1893{
2718aa7c 1894 struct xfrm_tmpl *t;
1da177e4 1895 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 1896 int socklen = 0;
1897 int i;
1898
1899 for (i=0; i<xp->xfrm_nr; i++) {
1900 t = xp->xfrm_vec + i;
1901 socklen += (t->encap_family == AF_INET ?
1902 sizeof(struct sockaddr_in) :
1903 sizeof(struct sockaddr_in6));
1904 }
1da177e4
LT		 1905
1906 return sizeof(struct sadb_msg) +
1907 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 1908 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 1909 (sockaddr_size * 2) +
1910 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 1911 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1912 (socklen * 2) +
df71837d 1913 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 1914}
1915
1916static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1917{
1918 struct sk_buff *skb;
1919 int size;
1920
1921 size = pfkey_xfrm_policy2msg_size(xp);
1922
1923 skb = alloc_skb(size + 16, GFP_ATOMIC);
1924 if (skb == NULL)
1925 return ERR_PTR(-ENOBUFS);
1926
1927 return skb;
1928}
1929
55569ce2 1930static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1da177e4
LT		 1931{
1932 struct sadb_msg *hdr;
1933 struct sadb_address *addr;
1934 struct sadb_lifetime *lifetime;
1935 struct sadb_x_policy *pol;
1936 struct sockaddr_in *sin;
df71837d
TJ		 1937 struct sadb_x_sec_ctx *sec_ctx;
1938 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 1939#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1940 struct sockaddr_in6 *sin6;
1941#endif
1942 int i;
1943 int size;
1944 int sockaddr_size = pfkey_sockaddr_size(xp->family);
1945 int socklen = (xp->family == AF_INET ?
1946 sizeof(struct sockaddr_in) :
1947 sizeof(struct sockaddr_in6));
1948
1949 size = pfkey_xfrm_policy2msg_size(xp);
1950
1951 /* call should fill header later */
1952 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1953 memset(hdr, 0, size); /* XXX do we need this ? */
1954
1955 /* src address */
8ff24541 1956 addr = (struct sadb_address*) skb_put(skb,
1da177e4 1957 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 1958 addr->sadb_address_len =
1da177e4
LT		 1959 (sizeof(struct sadb_address)+sockaddr_size)/
1960 sizeof(uint64_t);
1961 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1962 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1963 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1964 addr->sadb_address_reserved = 0;
1965 /* src address */
1966 if (xp->family == AF_INET) {
1967 sin = (struct sockaddr_in *) (addr + 1);
1968 sin->sin_family = AF_INET;
1969 sin->sin_addr.s_addr = xp->selector.saddr.a4;
1970 sin->sin_port = xp->selector.sport;
1971 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
1972 }
1973#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1974 else if (xp->family == AF_INET6) {
1975 sin6 = (struct sockaddr_in6 *) (addr + 1);
1976 sin6->sin6_family = AF_INET6;
1977 sin6->sin6_port = xp->selector.sport;
1978 sin6->sin6_flowinfo = 0;
1979 memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
1980 sizeof(struct in6_addr));
1981 sin6->sin6_scope_id = 0;
1982 }
1983#endif
1984 else
1985 BUG();
1986
1987 /* dst address */
8ff24541 1988 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 1989 sizeof(struct sadb_address)+sockaddr_size);
1990 addr->sadb_address_len =
1991 (sizeof(struct sadb_address)+sockaddr_size)/
1992 sizeof(uint64_t);
1993 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
1994 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 1995 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4
LT		 1996 addr->sadb_address_reserved = 0;
1997 if (xp->family == AF_INET) {
1998 sin = (struct sockaddr_in *) (addr + 1);
1999 sin->sin_family = AF_INET;
2000 sin->sin_addr.s_addr = xp->selector.daddr.a4;
2001 sin->sin_port = xp->selector.dport;
2002 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2003 }
2004#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2005 else if (xp->family == AF_INET6) {
2006 sin6 = (struct sockaddr_in6 *) (addr + 1);
2007 sin6->sin6_family = AF_INET6;
2008 sin6->sin6_port = xp->selector.dport;
2009 sin6->sin6_flowinfo = 0;
2010 memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
2011 sizeof(struct in6_addr));
2012 sin6->sin6_scope_id = 0;
2013 }
2014#endif
2015 else
2016 BUG();
2017
2018 /* hard time */
8ff24541 2019 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2020 sizeof(struct sadb_lifetime));
2021 lifetime->sadb_lifetime_len =
2022 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2023 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2024 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2025 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2026 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2027 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2028 /* soft time */
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_SOFT;
2034 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2035 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2036 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2037 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2038 /* current time */
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_CURRENT;
2044 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2045 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2046 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2047 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2048
2049 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2050 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2051 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2052 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2053 if (xp->action == XFRM_POLICY_ALLOW) {
2054 if (xp->xfrm_nr)
2055 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2056 else
2057 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2058 }
2059 pol->sadb_x_policy_dir = dir+1;
2060 pol->sadb_x_policy_id = xp->index;
2061 pol->sadb_x_policy_priority = xp->priority;
2062
2063 for (i=0; i<xp->xfrm_nr; i++) {
2064 struct sadb_x_ipsecrequest *rq;
2065 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2066 int req_size;
55569ce2 2067 int mode;
1da177e4
LT		 2068
2069 req_size = sizeof(struct sadb_x_ipsecrequest);
7e49e6de 2070 if (t->mode == XFRM_MODE_TUNNEL)
2718aa7c 2071 req_size += ((t->encap_family == AF_INET ?
8ff24541
YH		 2072 sizeof(struct sockaddr_in) :
2073 sizeof(struct sockaddr_in6)) * 2);
1da177e4
LT		 2074 else
2075 size -= 2*socklen;
2076 rq = (void*)skb_put(skb, req_size);
2077 pol->sadb_x_policy_len += req_size/8;
2078 memset(rq, 0, sizeof(*rq));
2079 rq->sadb_x_ipsecrequest_len = req_size;
2080 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2081 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2082 return -EINVAL;
fefaa75e 2083 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2084 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2085 if (t->reqid)
2086 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2087 if (t->optional)
2088 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2089 rq->sadb_x_ipsecrequest_reqid = t->reqid;
7e49e6de 2090 if (t->mode == XFRM_MODE_TUNNEL) {
2718aa7c 2091 switch (t->encap_family) {
1da177e4
LT		 2092 case AF_INET:
2093 sin = (void*)(rq+1);
2094 sin->sin_family = AF_INET;
2095 sin->sin_addr.s_addr = t->saddr.a4;
2096 sin->sin_port = 0;
2097 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2098 sin++;
2099 sin->sin_family = AF_INET;
2100 sin->sin_addr.s_addr = t->id.daddr.a4;
2101 sin->sin_port = 0;
2102 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
2103 break;
2104#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2105 case AF_INET6:
2106 sin6 = (void*)(rq+1);
2107 sin6->sin6_family = AF_INET6;
2108 sin6->sin6_port = 0;
2109 sin6->sin6_flowinfo = 0;
2110 memcpy(&sin6->sin6_addr, t->saddr.a6,
2111 sizeof(struct in6_addr));
2112 sin6->sin6_scope_id = 0;
2113
2114 sin6++;
2115 sin6->sin6_family = AF_INET6;
2116 sin6->sin6_port = 0;
2117 sin6->sin6_flowinfo = 0;
2118 memcpy(&sin6->sin6_addr, t->id.daddr.a6,
2119 sizeof(struct in6_addr));
2120 sin6->sin6_scope_id = 0;
2121 break;
2122#endif
2123 default:
2124 break;
2125 }
2126 }
2127 }
df71837d
TJ		 2128
2129 /* security context */
2130 if ((xfrm_ctx = xp->security)) {
2131 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2132
2133 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2134 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2135 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2136 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2137 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2138 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2139 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2140 xfrm_ctx->ctx_len);
2141 }
2142
1da177e4
LT		 2143 hdr->sadb_msg_len = size / sizeof(uint64_t);
2144 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
55569ce2
KM		 2145
2146 return 0;
1da177e4
LT		 2147}
2148
26b15dad
JHS		 2149static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2150{
2151 struct sk_buff *out_skb;
2152 struct sadb_msg *out_hdr;
2153 int err;
2154
2155 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2156 if (IS_ERR(out_skb)) {
2157 err = PTR_ERR(out_skb);
2158 goto out;
2159 }
55569ce2
KM		 2160 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2161 if (err < 0)
2162 return err;
26b15dad
JHS		 2163
2164 out_hdr = (struct sadb_msg *) out_skb->data;
2165 out_hdr->sadb_msg_version = PF_KEY_V2;
2166
f60f6b8f 2167 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2168 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2169 else
2170 out_hdr->sadb_msg_type = event2poltype(c->event);
2171 out_hdr->sadb_msg_errno = 0;
2172 out_hdr->sadb_msg_seq = c->seq;
2173 out_hdr->sadb_msg_pid = c->pid;
2174 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2175out:
2176 return 0;
2177
2178}
2179
1da177e4
LT		 2180static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2181{
df71837d 2182 int err = 0;
1da177e4
LT		 2183 struct sadb_lifetime *lifetime;
2184 struct sadb_address *sa;
2185 struct sadb_x_policy *pol;
2186 struct xfrm_policy *xp;
26b15dad 2187 struct km_event c;
df71837d 2188 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2189
2190 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2191 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2192 !ext_hdrs[SADB_X_EXT_POLICY-1])
2193 return -EINVAL;
2194
2195 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2196 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2197 return -EINVAL;
2198 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2199 return -EINVAL;
2200
2201 xp = xfrm_policy_alloc(GFP_KERNEL);
2202 if (xp == NULL)
2203 return -ENOBUFS;
2204
2205 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2206 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2207 xp->priority = pol->sadb_x_policy_priority;
2208
8ff24541 2209 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2210 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2211 if (!xp->family) {
2212 err = -EINVAL;
2213 goto out;
2214 }
2215 xp->selector.family = xp->family;
2216 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2217 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2218 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2219 if (xp->selector.sport)
8f83f23e 2220 xp->selector.sport_mask = htons(0xffff);
1da177e4 2221
8ff24541 2222 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2223 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2224 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2225
2226 /* Amusing, we set this twice. KAME apps appear to set same value
2227 * in both addresses.
2228 */
2229 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2230
2231 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2232 if (xp->selector.dport)
8f83f23e 2233 xp->selector.dport_mask = htons(0xffff);
1da177e4 2234
df71837d
TJ		 2235 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2236 if (sec_ctx != NULL) {
2237 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2238
2239 if (!uctx) {
2240 err = -ENOBUFS;
2241 goto out;
2242 }
2243
2244 err = security_xfrm_policy_alloc(xp, uctx);
2245 kfree(uctx);
2246
2247 if (err)
2248 goto out;
2249 }
2250
1da177e4
LT		 2251 xp->lft.soft_byte_limit = XFRM_INF;
2252 xp->lft.hard_byte_limit = XFRM_INF;
2253 xp->lft.soft_packet_limit = XFRM_INF;
2254 xp->lft.hard_packet_limit = XFRM_INF;
2255 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2256 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2257 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2258 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2259 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2260 }
2261 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2262 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2263 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2264 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2265 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2266 }
2267 xp->xfrm_nr = 0;
2268 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2269 (err = parse_ipsecrequests(xp, pol)) < 0)
2270 goto out;
2271
1da177e4
LT		 2272 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2273 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2274
ab5f5e8b
JL		 2275 xfrm_audit_policy_add(xp, err ? 0 : 1,
2276 audit_get_loginuid(current->audit_context), 0);
161a09e7 2277
df71837d
TJ		 2278 if (err)
2279 goto out;
1da177e4 2280
26b15dad 2281 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2282 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2283 else
f60f6b8f 2284 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2285
26b15dad
JHS		 2286 c.seq = hdr->sadb_msg_seq;
2287 c.pid = hdr->sadb_msg_pid;
1da177e4 2288
26b15dad
JHS		 2289 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2290 xfrm_pol_put(xp);
1da177e4
LT		 2291 return 0;
2292
2293out:
df71837d 2294 security_xfrm_policy_free(xp);
1da177e4
LT		 2295 kfree(xp);
2296 return err;
2297}
2298
2299static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2300{
2301 int err;
2302 struct sadb_address *sa;
2303 struct sadb_x_policy *pol;
df71837d 2304 struct xfrm_policy *xp, tmp;
1da177e4 2305 struct xfrm_selector sel;
26b15dad 2306 struct km_event c;
df71837d 2307 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2308
2309 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2310 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2311 !ext_hdrs[SADB_X_EXT_POLICY-1])
2312 return -EINVAL;
2313
2314 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2315 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2316 return -EINVAL;
2317
2318 memset(&sel, 0, sizeof(sel));
2319
8ff24541 2320 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2321 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2322 sel.prefixlen_s = sa->sadb_address_prefixlen;
2323 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2324 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2325 if (sel.sport)
8f83f23e 2326 sel.sport_mask = htons(0xffff);
1da177e4 2327
8ff24541 2328 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2329 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2330 sel.prefixlen_d = sa->sadb_address_prefixlen;
2331 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2332 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2333 if (sel.dport)
8f83f23e 2334 sel.dport_mask = htons(0xffff);
1da177e4 2335
df71837d
TJ		 2336 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2337 memset(&tmp, 0, sizeof(struct xfrm_policy));
2338
2339 if (sec_ctx != NULL) {
2340 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2341
2342 if (!uctx)
2343 return -ENOMEM;
2344
2345 err = security_xfrm_policy_alloc(&tmp, uctx);
2346 kfree(uctx);
2347
2348 if (err)
2349 return err;
2350 }
2351
f7b6983f 2352 xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1,
ef41aaa0 2353 &sel, tmp.security, 1, &err);
df71837d 2354 security_xfrm_policy_free(&tmp);
161a09e7 2355
1da177e4
LT		 2356 if (xp == NULL)
2357 return -ENOENT;
2358
ab5f5e8b
JL		 2359 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2360 audit_get_loginuid(current->audit_context), 0);
13fcfbb0
DM		 2361
2362 if (err)
c8c05a8e 2363 goto out;
13fcfbb0 2364
26b15dad
JHS		 2365 c.seq = hdr->sadb_msg_seq;
2366 c.pid = hdr->sadb_msg_pid;
f60f6b8f 2367 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2368 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2369
c8c05a8e 2370out:
26b15dad
JHS		 2371 xfrm_pol_put(xp);
2372 return err;
2373}
2374
2375static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2376{
2377 int err;
2378 struct sk_buff *out_skb;
2379 struct sadb_msg *out_hdr;
2380 err = 0;
2381
1da177e4
LT		 2382 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2383 if (IS_ERR(out_skb)) {
2384 err = PTR_ERR(out_skb);
2385 goto out;
2386 }
55569ce2
KM		 2387 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2388 if (err < 0)
2389 goto out;
1da177e4
LT		 2390
2391 out_hdr = (struct sadb_msg *) out_skb->data;
2392 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2393 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2394 out_hdr->sadb_msg_satype = 0;
2395 out_hdr->sadb_msg_errno = 0;
2396 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2397 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
26b15dad 2398 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1da177e4
LT		 2399 err = 0;
2400
2401out:
1da177e4
LT		 2402 return err;
2403}
2404
08de61be
SS		 2405#ifdef CONFIG_NET_KEY_MIGRATE
2406static int pfkey_sockaddr_pair_size(sa_family_t family)
2407{
2408 switch (family) {
2409 case AF_INET:
2410 return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2);
2411#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2412 case AF_INET6:
2413 return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2);
2414#endif
2415 default:
2416 return 0;
2417 }
2418 /* NOTREACHED */
2419}
2420
2421static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq,
2422 xfrm_address_t *saddr, xfrm_address_t *daddr,
2423 u16 *family)
2424{
2425 struct sockaddr *sa = (struct sockaddr *)(rq + 1);
2426 if (rq->sadb_x_ipsecrequest_len <
2427 pfkey_sockaddr_pair_size(sa->sa_family))
2428 return -EINVAL;
2429
2430 switch (sa->sa_family) {
2431 case AF_INET:
2432 {
2433 struct sockaddr_in *sin;
2434 sin = (struct sockaddr_in *)sa;
2435 if ((sin+1)->sin_family != AF_INET)
2436 return -EINVAL;
2437 memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4));
2438 sin++;
2439 memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4));
2440 *family = AF_INET;
2441 break;
2442 }
2443#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2444 case AF_INET6:
2445 {
2446 struct sockaddr_in6 *sin6;
2447 sin6 = (struct sockaddr_in6 *)sa;
2448 if ((sin6+1)->sin6_family != AF_INET6)
2449 return -EINVAL;
2450 memcpy(&saddr->a6, &sin6->sin6_addr,
2451 sizeof(saddr->a6));
2452 sin6++;
2453 memcpy(&daddr->a6, &sin6->sin6_addr,
2454 sizeof(daddr->a6));
2455 *family = AF_INET6;
2456 break;
2457 }
2458#endif
2459 default:
2460 return -EINVAL;
2461 }
2462
2463 return 0;
2464}
2465
2466static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2467 struct xfrm_migrate *m)
2468{
2469 int err;
2470 struct sadb_x_ipsecrequest *rq2;
55569ce2 2471 int mode;
08de61be
SS		 2472
2473 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2474 len < rq1->sadb_x_ipsecrequest_len)
2475 return -EINVAL;
2476
2477 /* old endoints */
2478 err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr,
2479 &m->old_family);
2480 if (err)
2481 return err;
2482
2483 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2484 len -= rq1->sadb_x_ipsecrequest_len;
2485
2486 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2487 len < rq2->sadb_x_ipsecrequest_len)
2488 return -EINVAL;
2489
2490 /* new endpoints */
2491 err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr,
2492 &m->new_family);
2493 if (err)
2494 return err;
2495
2496 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2497 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2498 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2499 return -EINVAL;
2500
2501 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2502 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2503 return -EINVAL;
2504 m->mode = mode;
08de61be
SS		 2505 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2506
2507 return ((int)(rq1->sadb_x_ipsecrequest_len +
2508 rq2->sadb_x_ipsecrequest_len));
2509}
2510
2511static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2512 struct sadb_msg *hdr, void **ext_hdrs)
2513{
2514 int i, len, ret, err = -EINVAL;
2515 u8 dir;
2516 struct sadb_address *sa;
2517 struct sadb_x_policy *pol;
2518 struct sadb_x_ipsecrequest *rq;
2519 struct xfrm_selector sel;
2520 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2521
2522 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2523 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2524 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2525 err = -EINVAL;
2526 goto out;
2527 }
2528
2529 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
2530 if (!pol) {
2531 err = -EINVAL;
2532 goto out;
2533 }
2534
2535 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2536 err = -EINVAL;
2537 goto out;
2538 }
2539
2540 dir = pol->sadb_x_policy_dir - 1;
2541 memset(&sel, 0, sizeof(sel));
2542
2543 /* set source address info of selector */
2544 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2545 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2546 sel.prefixlen_s = sa->sadb_address_prefixlen;
2547 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2548 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2549 if (sel.sport)
582ee43d 2550 sel.sport_mask = htons(0xffff);
08de61be
SS		 2551
2552 /* set destination address info of selector */
2553 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2554 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2555 sel.prefixlen_d = sa->sadb_address_prefixlen;
2556 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2557 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2558 if (sel.dport)
582ee43d 2559 sel.dport_mask = htons(0xffff);
08de61be
SS		 2560
2561 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2562
2563 /* extract ipsecrequests */
2564 i = 0;
2565 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2566
2567 while (len > 0 && i < XFRM_MAX_DEPTH) {
2568 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2569 if (ret < 0) {
2570 err = ret;
2571 goto out;
2572 } else {
2573 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2574 len -= ret;
2575 i++;
2576 }
2577 }
2578
2579 if (!i || len > 0) {
2580 err = -EINVAL;
2581 goto out;
2582 }
2583
2584 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i);
2585
2586 out:
2587 return err;
2588}
2589#else
2590static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2591 struct sadb_msg *hdr, void **ext_hdrs)
2592{
2593 return -ENOPROTOOPT;
2594}
2595#endif
2596
2597
1da177e4
LT		 2598static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2599{
77d8d7a6 2600 unsigned int dir;
215a2dd3 2601 int err = 0, delete;
1da177e4
LT		 2602 struct sadb_x_policy *pol;
2603 struct xfrm_policy *xp;
26b15dad 2604 struct km_event c;
1da177e4
LT		 2605
2606 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2607 return -EINVAL;
2608
77d8d7a6
HX		 2609 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2610 if (dir >= XFRM_POLICY_MAX)
2611 return -EINVAL;
2612
215a2dd3 2613 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
f7b6983f 2614 xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id,
215a2dd3 2615 delete, &err);
1da177e4
LT		 2616 if (xp == NULL)
2617 return -ENOENT;
2618
215a2dd3 2619 if (delete) {
ab5f5e8b
JL		 2620 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2621 audit_get_loginuid(current->audit_context), 0);
1da177e4 2622
215a2dd3
EP		 2623 if (err)
2624 goto out;
2625 c.seq = hdr->sadb_msg_seq;
2626 c.pid = hdr->sadb_msg_pid;
bf08867f 2627 c.data.byid = 1;
f60f6b8f 2628 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2629 km_policy_notify(xp, dir, &c);
26b15dad 2630 } else {
77d8d7a6 2631 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2632 }
1da177e4 2633
215a2dd3 2634out:
1da177e4
LT		 2635 xfrm_pol_put(xp);
2636 return err;
2637}
2638
2639static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2640{
2641 struct pfkey_dump_data *data = ptr;
2642 struct sk_buff *out_skb;
2643 struct sadb_msg *out_hdr;
55569ce2 2644 int err;
1da177e4
LT		 2645
2646 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2647 if (IS_ERR(out_skb))
2648 return PTR_ERR(out_skb);
2649
55569ce2
KM		 2650 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2651 if (err < 0)
2652 return err;
1da177e4
LT		 2653
2654 out_hdr = (struct sadb_msg *) out_skb->data;
2655 out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
2656 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2657 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2658 out_hdr->sadb_msg_errno = 0;
2659 out_hdr->sadb_msg_seq = count;
2660 out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
2661 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
2662 return 0;
2663}
2664
2665static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2666{
2667 struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
2668
f7b6983f 2669 return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data);
1da177e4
LT		 2670}
2671
26b15dad 2672static int key_notify_policy_flush(struct km_event *c)
1da177e4
LT		 2673{
2674 struct sk_buff *skb_out;
26b15dad 2675 struct sadb_msg *hdr;
1da177e4 2676
26b15dad 2677 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2678 if (!skb_out)
2679 return -ENOBUFS;
26b15dad 2680 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2681 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad
JHS		 2682 hdr->sadb_msg_seq = c->seq;
2683 hdr->sadb_msg_pid = c->pid;
2684 hdr->sadb_msg_version = PF_KEY_V2;
2685 hdr->sadb_msg_errno = (uint8_t) 0;
2686 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2687 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2688 return 0;
1da177e4 2689
26b15dad
JHS		 2690}
2691
2692static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2693{
2694 struct km_event c;
161a09e7 2695 struct xfrm_audit audit_info;
4aa2e62c 2696 int err;
1da177e4 2697
161a09e7
JL		 2698 audit_info.loginuid = audit_get_loginuid(current->audit_context);
2699 audit_info.secid = 0;
4aa2e62c
JL		 2700 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2701 if (err)
2702 return err;
f7b6983f 2703 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2704 c.event = XFRM_MSG_FLUSHPOLICY;
26b15dad
JHS		 2705 c.pid = hdr->sadb_msg_pid;
2706 c.seq = hdr->sadb_msg_seq;
2707 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2708
2709 return 0;
2710}
2711
2712typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2713 struct sadb_msg *hdr, void **ext_hdrs);
2714static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2715 [SADB_RESERVED] = pfkey_reserved,
2716 [SADB_GETSPI] = pfkey_getspi,
2717 [SADB_UPDATE] = pfkey_add,
2718 [SADB_ADD] = pfkey_add,
2719 [SADB_DELETE] = pfkey_delete,
2720 [SADB_GET] = pfkey_get,
2721 [SADB_ACQUIRE] = pfkey_acquire,
2722 [SADB_REGISTER] = pfkey_register,
2723 [SADB_EXPIRE] = NULL,
2724 [SADB_FLUSH] = pfkey_flush,
2725 [SADB_DUMP] = pfkey_dump,
2726 [SADB_X_PROMISC] = pfkey_promisc,
2727 [SADB_X_PCHANGE] = NULL,
2728 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2729 [SADB_X_SPDADD] = pfkey_spdadd,
2730 [SADB_X_SPDDELETE] = pfkey_spddelete,
2731 [SADB_X_SPDGET] = pfkey_spdget,
2732 [SADB_X_SPDACQUIRE] = NULL,
2733 [SADB_X_SPDDUMP] = pfkey_spddump,
2734 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2735 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2736 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2737 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2738};
2739
2740static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2741{
2742 void *ext_hdrs[SADB_EXT_MAX];
2743 int err;
2744
2745 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2746 BROADCAST_PROMISC_ONLY, NULL);
2747
2748 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2749 err = parse_exthdrs(skb, hdr, ext_hdrs);
2750 if (!err) {
2751 err = -EOPNOTSUPP;
2752 if (pfkey_funcs[hdr->sadb_msg_type])
2753 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2754 }
2755 return err;
2756}
2757
2758static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2759{
2760 struct sadb_msg *hdr = NULL;
2761
2762 if (skb->len < sizeof(*hdr)) {
2763 *errp = -EMSGSIZE;
2764 } else {
2765 hdr = (struct sadb_msg *) skb->data;
2766 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2767 hdr->sadb_msg_reserved != 0 ||
2768 (hdr->sadb_msg_type <= SADB_RESERVED ||
2769 hdr->sadb_msg_type > SADB_MAX)) {
2770 hdr = NULL;
2771 *errp = -EINVAL;
2772 } else if (hdr->sadb_msg_len != (skb->len /
2773 sizeof(uint64_t)) ||
2774 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2775 sizeof(uint64_t))) {
2776 hdr = NULL;
2777 *errp = -EMSGSIZE;
2778 } else {
2779 *errp = 0;
2780 }
2781 }
2782 return hdr;
2783}
2784
2785static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2786{
2787 return t->aalgos & (1 << d->desc.sadb_alg_id);
2788}
2789
2790static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2791{
2792 return t->ealgos & (1 << d->desc.sadb_alg_id);
2793}
2794
2795static int count_ah_combs(struct xfrm_tmpl *t)
2796{
2797 int i, sz = 0;
2798
2799 for (i = 0; ; i++) {
2800 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2801 if (!aalg)
2802 break;
2803 if (aalg_tmpl_set(t, aalg) && aalg->available)
2804 sz += sizeof(struct sadb_comb);
2805 }
2806 return sz + sizeof(struct sadb_prop);
2807}
2808
2809static int count_esp_combs(struct xfrm_tmpl *t)
2810{
2811 int i, k, sz = 0;
2812
2813 for (i = 0; ; i++) {
2814 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2815 if (!ealg)
2816 break;
8ff24541 2817
1da177e4
LT		 2818 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2819 continue;
8ff24541 2820
1da177e4
LT		 2821 for (k = 1; ; k++) {
2822 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2823 if (!aalg)
2824 break;
8ff24541 2825
1da177e4
LT		 2826 if (aalg_tmpl_set(t, aalg) && aalg->available)
2827 sz += sizeof(struct sadb_comb);
2828 }
2829 }
2830 return sz + sizeof(struct sadb_prop);
2831}
2832
2833static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2834{
2835 struct sadb_prop *p;
2836 int i;
2837
2838 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2839 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2840 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2841 p->sadb_prop_replay = 32;
2842 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2843
2844 for (i = 0; ; i++) {
2845 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2846 if (!aalg)
2847 break;
2848
2849 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2850 struct sadb_comb *c;
2851 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2852 memset(c, 0, sizeof(*c));
2853 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2854 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2855 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2856 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2857 c->sadb_comb_hard_addtime = 24*60*60;
2858 c->sadb_comb_soft_addtime = 20*60*60;
2859 c->sadb_comb_hard_usetime = 8*60*60;
2860 c->sadb_comb_soft_usetime = 7*60*60;
2861 }
2862 }
2863}
2864
2865static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2866{
2867 struct sadb_prop *p;
2868 int i, k;
2869
2870 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2871 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2872 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2873 p->sadb_prop_replay = 32;
2874 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2875
2876 for (i=0; ; i++) {
2877 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2878 if (!ealg)
2879 break;
8ff24541 2880
1da177e4
LT		 2881 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2882 continue;
8ff24541 2883
1da177e4
LT		 2884 for (k = 1; ; k++) {
2885 struct sadb_comb *c;
2886 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2887 if (!aalg)
2888 break;
2889 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2890 continue;
2891 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2892 memset(c, 0, sizeof(*c));
2893 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2894 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2895 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2896 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2897 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2898 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2899 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2900 c->sadb_comb_hard_addtime = 24*60*60;
2901 c->sadb_comb_soft_addtime = 20*60*60;
2902 c->sadb_comb_hard_usetime = 8*60*60;
2903 c->sadb_comb_soft_usetime = 7*60*60;
2904 }
2905 }
2906}
2907
26b15dad
JHS		 2908static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2909{
2910 return 0;
2911}
2912
2913static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2914{
2915 struct sk_buff *out_skb;
2916 struct sadb_msg *out_hdr;
26b15dad
JHS		 2917 int hard;
2918 int hsc;
2919
bf08867f 2920 hard = c->data.hard;
26b15dad
JHS		 2921 if (hard)
2922 hsc = 2;
2923 else
2924 hsc = 1;
1da177e4 2925
050f009e 2926 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 2927 if (IS_ERR(out_skb))
2928 return PTR_ERR(out_skb);
2929
2930 out_hdr = (struct sadb_msg *) out_skb->data;
2931 out_hdr->sadb_msg_version = PF_KEY_V2;
2932 out_hdr->sadb_msg_type = SADB_EXPIRE;
2933 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2934 out_hdr->sadb_msg_errno = 0;
2935 out_hdr->sadb_msg_reserved = 0;
2936 out_hdr->sadb_msg_seq = 0;
2937 out_hdr->sadb_msg_pid = 0;
2938
2939 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2940 return 0;
2941}
2942
26b15dad
JHS		 2943static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2944{
2945 switch (c->event) {
f60f6b8f 2946 case XFRM_MSG_EXPIRE:
26b15dad 2947 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 2948 case XFRM_MSG_DELSA:
2949 case XFRM_MSG_NEWSA:
2950 case XFRM_MSG_UPDSA:
26b15dad 2951 return key_notify_sa(x, c);
f60f6b8f 2952 case XFRM_MSG_FLUSHSA:
26b15dad 2953 return key_notify_sa_flush(c);
d51d081d
JHS		 2954 case XFRM_MSG_NEWAE: /* not yet supported */
2955 break;
26b15dad
JHS		 2956 default:
2957 printk("pfkey: Unknown SA event %d\n", c->event);
2958 break;
2959 }
2960
2961 return 0;
2962}
2963
2964static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2965{
f7b6983f
MN		 2966 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2967 return 0;
2968
26b15dad 2969 switch (c->event) {
f60f6b8f 2970 case XFRM_MSG_POLEXPIRE:
26b15dad 2971 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 2972 case XFRM_MSG_DELPOLICY:
2973 case XFRM_MSG_NEWPOLICY:
2974 case XFRM_MSG_UPDPOLICY:
26b15dad 2975 return key_notify_policy(xp, dir, c);
f60f6b8f 2976 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 2977 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2978 break;
26b15dad
JHS		 2979 return key_notify_policy_flush(c);
2980 default:
2981 printk("pfkey: Unknown policy event %d\n", c->event);
2982 break;
2983 }
2984
2985 return 0;
2986}
2987
1da177e4
LT		 2988static u32 get_acqseq(void)
2989{
2990 u32 res;
2991 static u32 acqseq;
2992 static DEFINE_SPINLOCK(acqseq_lock);
2993
2994 spin_lock_bh(&acqseq_lock);
2995 res = (++acqseq ? : ++acqseq);
2996 spin_unlock_bh(&acqseq_lock);
2997 return res;
2998}
2999
3000static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3001{
3002 struct sk_buff *skb;
3003 struct sadb_msg *hdr;
3004 struct sadb_address *addr;
3005 struct sadb_x_policy *pol;
3006 struct sockaddr_in *sin;
3007#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3008 struct sockaddr_in6 *sin6;
3009#endif
3010 int sockaddr_size;
3011 int size;
4e2ba18e
VY		 3012 struct sadb_x_sec_ctx *sec_ctx;
3013 struct xfrm_sec_ctx *xfrm_ctx;
3014 int ctx_size = 0;
8ff24541 3015
1da177e4
LT		 3016 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3017 if (!sockaddr_size)
3018 return -EINVAL;
3019
3020 size = sizeof(struct sadb_msg) +
3021 (sizeof(struct sadb_address) * 2) +
3022 (sockaddr_size * 2) +
3023 sizeof(struct sadb_x_policy);
8ff24541 3024
1da177e4
LT		 3025 if (x->id.proto == IPPROTO_AH)
3026 size += count_ah_combs(t);
3027 else if (x->id.proto == IPPROTO_ESP)
3028 size += count_esp_combs(t);
3029
4e2ba18e
VY		 3030 if ((xfrm_ctx = x->security)) {
3031 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3032 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3033 }
3034
1da177e4
LT		 3035 skb = alloc_skb(size + 16, GFP_ATOMIC);
3036 if (skb == NULL)
3037 return -ENOMEM;
8ff24541 3038
1da177e4
LT		 3039 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3040 hdr->sadb_msg_version = PF_KEY_V2;
3041 hdr->sadb_msg_type = SADB_ACQUIRE;
3042 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3043 hdr->sadb_msg_len = size / sizeof(uint64_t);
3044 hdr->sadb_msg_errno = 0;
3045 hdr->sadb_msg_reserved = 0;
3046 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3047 hdr->sadb_msg_pid = 0;
3048
3049 /* src address */
8ff24541 3050 addr = (struct sadb_address*) skb_put(skb,
1da177e4 3051 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3052 addr->sadb_address_len =
1da177e4
LT		 3053 (sizeof(struct sadb_address)+sockaddr_size)/
3054 sizeof(uint64_t);
3055 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3056 addr->sadb_address_proto = 0;
3057 addr->sadb_address_reserved = 0;
3058 if (x->props.family == AF_INET) {
3059 addr->sadb_address_prefixlen = 32;
3060
3061 sin = (struct sockaddr_in *) (addr + 1);
3062 sin->sin_family = AF_INET;
3063 sin->sin_addr.s_addr = x->props.saddr.a4;
3064 sin->sin_port = 0;
3065 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3066 }
3067#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3068 else if (x->props.family == AF_INET6) {
3069 addr->sadb_address_prefixlen = 128;
3070
3071 sin6 = (struct sockaddr_in6 *) (addr + 1);
3072 sin6->sin6_family = AF_INET6;
3073 sin6->sin6_port = 0;
3074 sin6->sin6_flowinfo = 0;
3075 memcpy(&sin6->sin6_addr,
3076 x->props.saddr.a6, sizeof(struct in6_addr));
3077 sin6->sin6_scope_id = 0;
3078 }
3079#endif
3080 else
3081 BUG();
8ff24541 3082
1da177e4 3083 /* dst address */
8ff24541 3084 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 3085 sizeof(struct sadb_address)+sockaddr_size);
3086 addr->sadb_address_len =
3087 (sizeof(struct sadb_address)+sockaddr_size)/
3088 sizeof(uint64_t);
3089 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3090 addr->sadb_address_proto = 0;
3091 addr->sadb_address_reserved = 0;
3092 if (x->props.family == AF_INET) {
8ff24541 3093 addr->sadb_address_prefixlen = 32;
1da177e4
LT		 3094
3095 sin = (struct sockaddr_in *) (addr + 1);
3096 sin->sin_family = AF_INET;
3097 sin->sin_addr.s_addr = x->id.daddr.a4;
3098 sin->sin_port = 0;
3099 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3100 }
3101#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3102 else if (x->props.family == AF_INET6) {
8ff24541 3103 addr->sadb_address_prefixlen = 128;
1da177e4
LT		 3104
3105 sin6 = (struct sockaddr_in6 *) (addr + 1);
3106 sin6->sin6_family = AF_INET6;
3107 sin6->sin6_port = 0;
3108 sin6->sin6_flowinfo = 0;
3109 memcpy(&sin6->sin6_addr,
3110 x->id.daddr.a6, sizeof(struct in6_addr));
3111 sin6->sin6_scope_id = 0;
3112 }
3113#endif
3114 else
3115 BUG();
3116
3117 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3118 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3119 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3120 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3121 pol->sadb_x_policy_dir = dir+1;
3122 pol->sadb_x_policy_id = xp->index;
3123
3124 /* Set sadb_comb's. */
3125 if (x->id.proto == IPPROTO_AH)
3126 dump_ah_combs(skb, t);
3127 else if (x->id.proto == IPPROTO_ESP)
3128 dump_esp_combs(skb, t);
3129
4e2ba18e
VY		 3130 /* security context */
3131 if (xfrm_ctx) {
3132 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3133 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3134 sec_ctx->sadb_x_sec_len =
3135 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3136 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3137 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3138 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3139 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3140 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3141 xfrm_ctx->ctx_len);
3142 }
3143
1da177e4
LT		 3144 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3145}
3146
cb969f07 3147static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3148 u8 *data, int len, int *dir)
1da177e4
LT		 3149{
3150 struct xfrm_policy *xp;
3151 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3152 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3153
cb969f07 3154 switch (sk->sk_family) {
1da177e4
LT		 3155 case AF_INET:
3156 if (opt != IP_IPSEC_POLICY) {
3157 *dir = -EOPNOTSUPP;
3158 return NULL;
3159 }
3160 break;
3161#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3162 case AF_INET6:
3163 if (opt != IPV6_IPSEC_POLICY) {
3164 *dir = -EOPNOTSUPP;
3165 return NULL;
3166 }
3167 break;
3168#endif
3169 default:
3170 *dir = -EINVAL;
3171 return NULL;
3172 }
3173
3174 *dir = -EINVAL;
3175
3176 if (len < sizeof(struct sadb_x_policy) ||
3177 pol->sadb_x_policy_len*8 > len ||
3178 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3179 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3180 return NULL;
3181
3182 xp = xfrm_policy_alloc(GFP_ATOMIC);
3183 if (xp == NULL) {
3184 *dir = -ENOBUFS;
3185 return NULL;
3186 }
3187
3188 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3189 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3190
3191 xp->lft.soft_byte_limit = XFRM_INF;
3192 xp->lft.hard_byte_limit = XFRM_INF;
3193 xp->lft.soft_packet_limit = XFRM_INF;
3194 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3195 xp->family = sk->sk_family;
1da177e4
LT		 3196
3197 xp->xfrm_nr = 0;
3198 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3199 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3200 goto out;
3201
df71837d
TJ		 3202 /* security context too */
3203 if (len >= (pol->sadb_x_policy_len*8 +
3204 sizeof(struct sadb_x_sec_ctx))) {
3205 char *p = (char *)pol;
3206 struct xfrm_user_sec_ctx *uctx;
3207
3208 p += pol->sadb_x_policy_len*8;
3209 sec_ctx = (struct sadb_x_sec_ctx *)p;
3210 if (len < pol->sadb_x_policy_len*8 +
cb969f07
VY		 3211 sec_ctx->sadb_x_sec_len) {
3212 *dir = -EINVAL;
df71837d 3213 goto out;
cb969f07 3214 }
df71837d
TJ		 3215 if ((*dir = verify_sec_ctx_len(p)))
3216 goto out;
3217 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3218 *dir = security_xfrm_policy_alloc(xp, uctx);
3219 kfree(uctx);
3220
3221 if (*dir)
3222 goto out;
3223 }
3224
1da177e4
LT		 3225 *dir = pol->sadb_x_policy_dir-1;
3226 return xp;
3227
3228out:
df71837d 3229 security_xfrm_policy_free(xp);
1da177e4
LT		 3230 kfree(xp);
3231 return NULL;
3232}
3233
5d36b180 3234static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3235{
3236 struct sk_buff *skb;
3237 struct sadb_msg *hdr;
3238 struct sadb_sa *sa;
3239 struct sadb_address *addr;
3240 struct sadb_x_nat_t_port *n_port;
3241 struct sockaddr_in *sin;
3242#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3243 struct sockaddr_in6 *sin6;
3244#endif
3245 int sockaddr_size;
3246 int size;
3247 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3248 struct xfrm_encap_tmpl *natt = NULL;
3249
3250 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3251 if (!sockaddr_size)
3252 return -EINVAL;
3253
3254 if (!satype)
3255 return -EINVAL;
3256
3257 if (!x->encap)
3258 return -EINVAL;
3259
3260 natt = x->encap;
3261
3262 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3263 *
3264 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3265 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3266 */
8ff24541 3267
1da177e4
LT		 3268 size = sizeof(struct sadb_msg) +
3269 sizeof(struct sadb_sa) +
3270 (sizeof(struct sadb_address) * 2) +
3271 (sockaddr_size * 2) +
3272 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3273
1da177e4
LT		 3274 skb = alloc_skb(size + 16, GFP_ATOMIC);
3275 if (skb == NULL)
3276 return -ENOMEM;
8ff24541 3277
1da177e4
LT		 3278 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3279 hdr->sadb_msg_version = PF_KEY_V2;
3280 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3281 hdr->sadb_msg_satype = satype;
3282 hdr->sadb_msg_len = size / sizeof(uint64_t);
3283 hdr->sadb_msg_errno = 0;
3284 hdr->sadb_msg_reserved = 0;
3285 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3286 hdr->sadb_msg_pid = 0;
3287
3288 /* SA */
3289 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3290 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3291 sa->sadb_sa_exttype = SADB_EXT_SA;
3292 sa->sadb_sa_spi = x->id.spi;
3293 sa->sadb_sa_replay = 0;
3294 sa->sadb_sa_state = 0;
3295 sa->sadb_sa_auth = 0;
3296 sa->sadb_sa_encrypt = 0;
3297 sa->sadb_sa_flags = 0;
3298
3299 /* ADDRESS_SRC (old addr) */
3300 addr = (struct sadb_address*)
3301 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3302 addr->sadb_address_len =
1da177e4
LT		 3303 (sizeof(struct sadb_address)+sockaddr_size)/
3304 sizeof(uint64_t);
3305 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3306 addr->sadb_address_proto = 0;
3307 addr->sadb_address_reserved = 0;
3308 if (x->props.family == AF_INET) {
3309 addr->sadb_address_prefixlen = 32;
3310
3311 sin = (struct sockaddr_in *) (addr + 1);
3312 sin->sin_family = AF_INET;
3313 sin->sin_addr.s_addr = x->props.saddr.a4;
3314 sin->sin_port = 0;
3315 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3316 }
3317#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3318 else if (x->props.family == AF_INET6) {
3319 addr->sadb_address_prefixlen = 128;
3320
3321 sin6 = (struct sockaddr_in6 *) (addr + 1);
3322 sin6->sin6_family = AF_INET6;
3323 sin6->sin6_port = 0;
3324 sin6->sin6_flowinfo = 0;
3325 memcpy(&sin6->sin6_addr,
3326 x->props.saddr.a6, sizeof(struct in6_addr));
3327 sin6->sin6_scope_id = 0;
3328 }
3329#endif
3330 else
3331 BUG();
3332
3333 /* NAT_T_SPORT (old port) */
3334 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3335 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3336 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3337 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3338 n_port->sadb_x_nat_t_port_reserved = 0;
3339
3340 /* ADDRESS_DST (new addr) */
3341 addr = (struct sadb_address*)
3342 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3343 addr->sadb_address_len =
1da177e4
LT		 3344 (sizeof(struct sadb_address)+sockaddr_size)/
3345 sizeof(uint64_t);
3346 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3347 addr->sadb_address_proto = 0;
3348 addr->sadb_address_reserved = 0;
3349 if (x->props.family == AF_INET) {
3350 addr->sadb_address_prefixlen = 32;
3351
3352 sin = (struct sockaddr_in *) (addr + 1);
3353 sin->sin_family = AF_INET;
3354 sin->sin_addr.s_addr = ipaddr->a4;
3355 sin->sin_port = 0;
3356 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3357 }
3358#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3359 else if (x->props.family == AF_INET6) {
3360 addr->sadb_address_prefixlen = 128;
3361
3362 sin6 = (struct sockaddr_in6 *) (addr + 1);
3363 sin6->sin6_family = AF_INET6;
3364 sin6->sin6_port = 0;
3365 sin6->sin6_flowinfo = 0;
3366 memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
3367 sin6->sin6_scope_id = 0;
3368 }
3369#endif
3370 else
3371 BUG();
3372
3373 /* NAT_T_DPORT (new port) */
3374 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3375 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3376 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3377 n_port->sadb_x_nat_t_port_port = sport;
3378 n_port->sadb_x_nat_t_port_reserved = 0;
3379
3380 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3381}
3382
08de61be
SS		 3383#ifdef CONFIG_NET_KEY_MIGRATE
3384static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3385 struct xfrm_selector *sel)
3386{
3387 struct sadb_address *addr;
3388 struct sockaddr_in *sin;
3389#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3390 struct sockaddr_in6 *sin6;
3391#endif
3392 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3393 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3394 addr->sadb_address_exttype = type;
3395 addr->sadb_address_proto = sel->proto;
3396 addr->sadb_address_reserved = 0;
3397
3398 switch (type) {
3399 case SADB_EXT_ADDRESS_SRC:
3400 if (sel->family == AF_INET) {
3401 addr->sadb_address_prefixlen = sel->prefixlen_s;
3402 sin = (struct sockaddr_in *)(addr + 1);
3403 sin->sin_family = AF_INET;
3404 memcpy(&sin->sin_addr.s_addr, &sel->saddr,
3405 sizeof(sin->sin_addr.s_addr));
3406 sin->sin_port = 0;
3407 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3408 }
3409#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3410 else if (sel->family == AF_INET6) {
3411 addr->sadb_address_prefixlen = sel->prefixlen_s;
3412 sin6 = (struct sockaddr_in6 *)(addr + 1);
3413 sin6->sin6_family = AF_INET6;
3414 sin6->sin6_port = 0;
3415 sin6->sin6_flowinfo = 0;
3416 sin6->sin6_scope_id = 0;
3417 memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr,
3418 sizeof(sin6->sin6_addr.s6_addr));
3419 }
3420#endif
3421 break;
3422 case SADB_EXT_ADDRESS_DST:
3423 if (sel->family == AF_INET) {
3424 addr->sadb_address_prefixlen = sel->prefixlen_d;
3425 sin = (struct sockaddr_in *)(addr + 1);
3426 sin->sin_family = AF_INET;
3427 memcpy(&sin->sin_addr.s_addr, &sel->daddr,
3428 sizeof(sin->sin_addr.s_addr));
3429 sin->sin_port = 0;
3430 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
3431 }
3432#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3433 else if (sel->family == AF_INET6) {
3434 addr->sadb_address_prefixlen = sel->prefixlen_d;
3435 sin6 = (struct sockaddr_in6 *)(addr + 1);
3436 sin6->sin6_family = AF_INET6;
3437 sin6->sin6_port = 0;
3438 sin6->sin6_flowinfo = 0;
3439 sin6->sin6_scope_id = 0;
3440 memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr,
3441 sizeof(sin6->sin6_addr.s6_addr));
3442 }
3443#endif
3444 break;
3445 default:
3446 return -EINVAL;
3447 }
3448
3449 return 0;
3450}
3451
3452static int set_ipsecrequest(struct sk_buff *skb,
3453 uint8_t proto, uint8_t mode, int level,
3454 uint32_t reqid, uint8_t family,
3455 xfrm_address_t *src, xfrm_address_t *dst)
3456{
3457 struct sadb_x_ipsecrequest *rq;
3458 struct sockaddr_in *sin;
3459#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3460 struct sockaddr_in6 *sin6;
3461#endif
3462 int size_req;
3463
3464 size_req = sizeof(struct sadb_x_ipsecrequest) +
3465 pfkey_sockaddr_pair_size(family);
3466
3467 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3468 memset(rq, 0, size_req);
3469 rq->sadb_x_ipsecrequest_len = size_req;
3470 rq->sadb_x_ipsecrequest_proto = proto;
3471 rq->sadb_x_ipsecrequest_mode = mode;
3472 rq->sadb_x_ipsecrequest_level = level;
3473 rq->sadb_x_ipsecrequest_reqid = reqid;
3474
3475 switch (family) {
3476 case AF_INET:
3477 sin = (struct sockaddr_in *)(rq + 1);
3478 sin->sin_family = AF_INET;
3479 memcpy(&sin->sin_addr.s_addr, src,
3480 sizeof(sin->sin_addr.s_addr));
3481 sin++;
3482 sin->sin_family = AF_INET;
3483 memcpy(&sin->sin_addr.s_addr, dst,
3484 sizeof(sin->sin_addr.s_addr));
3485 break;
3486#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3487 case AF_INET6:
3488 sin6 = (struct sockaddr_in6 *)(rq + 1);
3489 sin6->sin6_family = AF_INET6;
3490 sin6->sin6_port = 0;
3491 sin6->sin6_flowinfo = 0;
3492 sin6->sin6_scope_id = 0;
3493 memcpy(&sin6->sin6_addr.s6_addr, src,
3494 sizeof(sin6->sin6_addr.s6_addr));
3495 sin6++;
3496 sin6->sin6_family = AF_INET6;
3497 sin6->sin6_port = 0;
3498 sin6->sin6_flowinfo = 0;
3499 sin6->sin6_scope_id = 0;
3500 memcpy(&sin6->sin6_addr.s6_addr, dst,
3501 sizeof(sin6->sin6_addr.s6_addr));
3502 break;
3503#endif
3504 default:
3505 return -EINVAL;
3506 }
3507
3508 return 0;
3509}
3510#endif
3511
3512#ifdef CONFIG_NET_KEY_MIGRATE
3513static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3514 struct xfrm_migrate *m, int num_bundles)
3515{
3516 int i;
3517 int sasize_sel;
3518 int size = 0;
3519 int size_pol = 0;
3520 struct sk_buff *skb;
3521 struct sadb_msg *hdr;
3522 struct sadb_x_policy *pol;
3523 struct xfrm_migrate *mp;
3524
3525 if (type != XFRM_POLICY_TYPE_MAIN)
3526 return 0;
3527
3528 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3529 return -EINVAL;
3530
3531 /* selector */
3532 sasize_sel = pfkey_sockaddr_size(sel->family);
3533 if (!sasize_sel)
3534 return -EINVAL;
3535 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3536
3537 /* policy info */
3538 size_pol += sizeof(struct sadb_x_policy);
3539
3540 /* ipsecrequests */
3541 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3542 /* old locator pair */
3543 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3544 pfkey_sockaddr_pair_size(mp->old_family);
3545 /* new locator pair */
3546 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3547 pfkey_sockaddr_pair_size(mp->new_family);
3548 }
3549
3550 size += sizeof(struct sadb_msg) + size_pol;
3551
3552 /* alloc buffer */
3553 skb = alloc_skb(size, GFP_ATOMIC);
3554 if (skb == NULL)
3555 return -ENOMEM;
3556
3557 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3558 hdr->sadb_msg_version = PF_KEY_V2;
3559 hdr->sadb_msg_type = SADB_X_MIGRATE;
3560 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3561 hdr->sadb_msg_len = size / 8;
3562 hdr->sadb_msg_errno = 0;
3563 hdr->sadb_msg_reserved = 0;
3564 hdr->sadb_msg_seq = 0;
3565 hdr->sadb_msg_pid = 0;
3566
3567 /* selector src */
3568 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3569
3570 /* selector dst */
3571 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3572
3573 /* policy information */
3574 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3575 pol->sadb_x_policy_len = size_pol / 8;
3576 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3577 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3578 pol->sadb_x_policy_dir = dir + 1;
3579 pol->sadb_x_policy_id = 0;
3580 pol->sadb_x_policy_priority = 0;
3581
3582 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3583 /* old ipsecrequest */
55569ce2
KM		 3584 int mode = pfkey_mode_from_xfrm(mp->mode);
3585 if (mode < 0)
3586 return -EINVAL;
3587 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3588 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3589 mp->reqid, mp->old_family,
3590 &mp->old_saddr, &mp->old_daddr) < 0) {
3591 return -EINVAL;
3592 }
3593
3594 /* new ipsecrequest */
55569ce2 3595 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3596 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3597 mp->reqid, mp->new_family,
3598 &mp->new_saddr, &mp->new_daddr) < 0) {
3599 return -EINVAL;
3600 }
3601 }
3602
3603 /* broadcast migrate message to sockets */
3604 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3605
3606 return 0;
3607}
3608#else
3609static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3610 struct xfrm_migrate *m, int num_bundles)
3611{
3612 return -ENOPROTOOPT;
3613}
3614#endif
3615
1da177e4
LT		 3616static int pfkey_sendmsg(struct kiocb *kiocb,
3617 struct socket *sock, struct msghdr *msg, size_t len)
3618{
3619 struct sock *sk = sock->sk;
3620 struct sk_buff *skb = NULL;
3621 struct sadb_msg *hdr = NULL;
3622 int err;
3623
3624 err = -EOPNOTSUPP;
3625 if (msg->msg_flags & MSG_OOB)
3626 goto out;
3627
3628 err = -EMSGSIZE;
3629 if ((unsigned)len > sk->sk_sndbuf - 32)
3630 goto out;
3631
3632 err = -ENOBUFS;
3633 skb = alloc_skb(len, GFP_KERNEL);
3634 if (skb == NULL)
3635 goto out;
3636
3637 err = -EFAULT;
3638 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3639 goto out;
3640
3641 hdr = pfkey_get_base_msg(skb, &err);
3642 if (!hdr)
3643 goto out;
3644
4a3e2f71 3645 mutex_lock(&xfrm_cfg_mutex);
1da177e4 3646 err = pfkey_process(sk, skb, hdr);
4a3e2f71 3647 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 3648
3649out:
3650 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3651 err = 0;
3652 if (skb)
3653 kfree_skb(skb);
3654
3655 return err ? : len;
3656}
3657
3658static int pfkey_recvmsg(struct kiocb *kiocb,
3659 struct socket *sock, struct msghdr *msg, size_t len,
3660 int flags)
3661{
3662 struct sock *sk = sock->sk;
3663 struct sk_buff *skb;
3664 int copied, err;
3665
3666 err = -EINVAL;
3667 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3668 goto out;
3669
3670 msg->msg_namelen = 0;
3671 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3672 if (skb == NULL)
3673 goto out;
3674
3675 copied = skb->len;
3676 if (copied > len) {
3677 msg->msg_flags |= MSG_TRUNC;
3678 copied = len;
3679 }
3680
badff6d0 3681 skb_reset_transport_header(skb);
1da177e4
LT		 3682 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3683 if (err)
3684 goto out_free;
3685
3686 sock_recv_timestamp(msg, sk, skb);
3687
3688 err = (flags & MSG_TRUNC) ? skb->len : copied;
3689
3690out_free:
3691 skb_free_datagram(sk, skb);
3692out:
3693 return err;
3694}
3695
90ddc4f0 3696static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3697 .family = PF_KEY,
3698 .owner = THIS_MODULE,
3699 /* Operations that make no sense on pfkey sockets. */
3700 .bind = sock_no_bind,
3701 .connect = sock_no_connect,
3702 .socketpair = sock_no_socketpair,
3703 .accept = sock_no_accept,
3704 .getname = sock_no_getname,
3705 .ioctl = sock_no_ioctl,
3706 .listen = sock_no_listen,
3707 .shutdown = sock_no_shutdown,
3708 .setsockopt = sock_no_setsockopt,
3709 .getsockopt = sock_no_getsockopt,
3710 .mmap = sock_no_mmap,
3711 .sendpage = sock_no_sendpage,
3712
3713 /* Now the operations that really occur. */
3714 .release = pfkey_release,
3715 .poll = datagram_poll,
3716 .sendmsg = pfkey_sendmsg,
3717 .recvmsg = pfkey_recvmsg,
3718};
3719
3720static struct net_proto_family pfkey_family_ops = {
3721 .family = PF_KEY,
3722 .create = pfkey_create,
3723 .owner = THIS_MODULE,
3724};
3725
3726#ifdef CONFIG_PROC_FS
3727static int pfkey_read_proc(char *buffer, char **start, off_t offset,
3728 int length, int *eof, void *data)
3729{
3730 off_t pos = 0;
3731 off_t begin = 0;
3732 int len = 0;
3733 struct sock *s;
3734 struct hlist_node *node;
3735
3736 len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
3737
3738 read_lock(&pfkey_table_lock);
3739
3740 sk_for_each(s, node, &pfkey_table) {
3741 len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
3742 s,
3743 atomic_read(&s->sk_refcnt),
3744 atomic_read(&s->sk_rmem_alloc),
3745 atomic_read(&s->sk_wmem_alloc),
3746 sock_i_uid(s),
3747 sock_i_ino(s)
3748 );
3749
3750 buffer[len++] = '\n';
8ff24541 3751
1da177e4
LT		 3752 pos = begin + len;
3753 if (pos < offset) {
3754 len = 0;
3755 begin = pos;
3756 }
3757 if(pos > offset + length)
3758 goto done;
3759 }
3760 *eof = 1;
3761
3762done:
3763 read_unlock(&pfkey_table_lock);
3764
3765 *start = buffer + (offset - begin);
3766 len -= (offset - begin);
3767
3768 if (len > length)
3769 len = length;
3770 if (len < 0)
3771 len = 0;
3772
3773 return len;
3774}
3775#endif
3776
3777static struct xfrm_mgr pfkeyv2_mgr =
3778{
3779 .id = "pfkeyv2",
3780 .notify = pfkey_send_notify,
3781 .acquire = pfkey_send_acquire,
3782 .compile_policy = pfkey_compile_policy,
3783 .new_mapping = pfkey_send_new_mapping,
26b15dad 3784 .notify_policy = pfkey_send_policy_notify,
08de61be 3785 .migrate = pfkey_send_migrate,
1da177e4
LT		 3786};
3787
3788static void __exit ipsec_pfkey_exit(void)
3789{
3790 xfrm_unregister_km(&pfkeyv2_mgr);
457c4cbc 3791 remove_proc_entry("pfkey", init_net.proc_net);
1da177e4
LT		 3792 sock_unregister(PF_KEY);
3793 proto_unregister(&key_proto);
3794}
3795
3796static int __init ipsec_pfkey_init(void)
3797{
3798 int err = proto_register(&key_proto, 0);
3799
3800 if (err != 0)
3801 goto out;
3802
3803 err = sock_register(&pfkey_family_ops);
3804 if (err != 0)
3805 goto out_unregister_key_proto;
3806#ifdef CONFIG_PROC_FS
3807 err = -ENOMEM;
457c4cbc 3808 if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL)
1da177e4
LT		 3809 goto out_sock_unregister;
3810#endif
3811 err = xfrm_register_km(&pfkeyv2_mgr);
3812 if (err != 0)
3813 goto out_remove_proc_entry;
3814out:
3815 return err;
3816out_remove_proc_entry:
3817#ifdef CONFIG_PROC_FS
3818 remove_proc_entry("net/pfkey", NULL);
3819out_sock_unregister:
3820#endif
3821 sock_unregister(PF_KEY);
3822out_unregister_key_proto:
3823 proto_unregister(&key_proto);
3824 goto out;
3825}
3826
3827module_init(ipsec_pfkey_init);
3828module_exit(ipsec_pfkey_exit);
3829MODULE_LICENSE("GPL");
3830MODULE_ALIAS_NETPROTO(PF_KEY);
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