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