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netns PF_KEY: part 1
[deliverable/linux.git] / net / key / af_key.c
CommitLineData
1da177e4
LT		 1/*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
4fc268d2 17#include <linux/capability.h>
1da177e4
LT		 18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/socket.h>
21#include <linux/pfkeyv2.h>
22#include <linux/ipsec.h>
23#include <linux/skbuff.h>
24#include <linux/rtnetlink.h>
25#include <linux/in.h>
26#include <linux/in6.h>
27#include <linux/proc_fs.h>
28#include <linux/init.h>
457c4cbc 29#include <net/net_namespace.h>
3fa87a32 30#include <net/netns/generic.h>
1da177e4
LT		 31#include <net/xfrm.h>
32
33#include <net/sock.h>
34
35#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
36#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
37
3fa87a32
AD		 38static int pfkey_net_id;
39struct netns_pfkey {
40 /* List of all pfkey sockets. */
41 struct hlist_head table;
42 atomic_t socks_nr;
43};
1da177e4
LT		 44static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
45static DEFINE_RWLOCK(pfkey_table_lock);
46static atomic_t pfkey_table_users = ATOMIC_INIT(0);
47
1da177e4
LT		 48struct pfkey_sock {
49 /* struct sock must be the first member of struct pfkey_sock */
50 struct sock sk;
51 int registered;
52 int promisc;
83321d6b
TT		 53
54 struct {
55 uint8_t msg_version;
56 uint32_t msg_pid;
57 int (*dump)(struct pfkey_sock *sk);
58 void (*done)(struct pfkey_sock *sk);
59 union {
60 struct xfrm_policy_walk policy;
61 struct xfrm_state_walk state;
62 } u;
12a169e7 63 struct sk_buff *skb;
83321d6b 64 } dump;
1da177e4
LT		 65};
66
67static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
68{
69 return (struct pfkey_sock *)sk;
70}
71
83321d6b
TT		 72static int pfkey_can_dump(struct sock *sk)
73{
74 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
75 return 1;
76 return 0;
77}
78
05238204 79static void pfkey_terminate_dump(struct pfkey_sock *pfk)
83321d6b 80{
05238204 81 if (pfk->dump.dump) {
12a169e7
HX		 82 if (pfk->dump.skb) {
83 kfree_skb(pfk->dump.skb);
84 pfk->dump.skb = NULL;
85 }
05238204
TT		 86 pfk->dump.done(pfk);
87 pfk->dump.dump = NULL;
88 pfk->dump.done = NULL;
89 }
83321d6b
TT		 90}
91
1da177e4
LT		 92static void pfkey_sock_destruct(struct sock *sk)
93{
3fa87a32
AD		 94 struct net *net = sock_net(sk);
95 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
96
05238204 97 pfkey_terminate_dump(pfkey_sk(sk));
1da177e4
LT		 98 skb_queue_purge(&sk->sk_receive_queue);
99
100 if (!sock_flag(sk, SOCK_DEAD)) {
101 printk("Attempt to release alive pfkey socket: %p\n", sk);
102 return;
103 }
104
547b792c
IJ		 105 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
106 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
1da177e4 107
3fa87a32 108 atomic_dec(&net_pfkey->socks_nr);
1da177e4
LT		 109}
110
111static void pfkey_table_grab(void)
112{
113 write_lock_bh(&pfkey_table_lock);
114
115 if (atomic_read(&pfkey_table_users)) {
116 DECLARE_WAITQUEUE(wait, current);
117
118 add_wait_queue_exclusive(&pfkey_table_wait, &wait);
119 for(;;) {
120 set_current_state(TASK_UNINTERRUPTIBLE);
121 if (atomic_read(&pfkey_table_users) == 0)
122 break;
123 write_unlock_bh(&pfkey_table_lock);
124 schedule();
125 write_lock_bh(&pfkey_table_lock);
126 }
127
128 __set_current_state(TASK_RUNNING);
129 remove_wait_queue(&pfkey_table_wait, &wait);
130 }
131}
132
133static __inline__ void pfkey_table_ungrab(void)
134{
135 write_unlock_bh(&pfkey_table_lock);
136 wake_up(&pfkey_table_wait);
137}
138
139static __inline__ void pfkey_lock_table(void)
140{
141 /* read_lock() synchronizes us to pfkey_table_grab */
142
143 read_lock(&pfkey_table_lock);
144 atomic_inc(&pfkey_table_users);
145 read_unlock(&pfkey_table_lock);
146}
147
148static __inline__ void pfkey_unlock_table(void)
149{
150 if (atomic_dec_and_test(&pfkey_table_users))
151 wake_up(&pfkey_table_wait);
152}
153
154
90ddc4f0 155static const struct proto_ops pfkey_ops;
1da177e4
LT		 156
157static void pfkey_insert(struct sock *sk)
158{
3fa87a32
AD		 159 struct net *net = sock_net(sk);
160 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
161
1da177e4 162 pfkey_table_grab();
3fa87a32 163 sk_add_node(sk, &net_pfkey->table);
1da177e4
LT		 164 pfkey_table_ungrab();
165}
166
167static void pfkey_remove(struct sock *sk)
168{
169 pfkey_table_grab();
170 sk_del_node_init(sk);
171 pfkey_table_ungrab();
172}
173
174static struct proto key_proto = {
175 .name = "KEY",
176 .owner = THIS_MODULE,
177 .obj_size = sizeof(struct pfkey_sock),
178};
179
1b8d7ae4 180static int pfkey_create(struct net *net, struct socket *sock, int protocol)
1da177e4 181{
3fa87a32 182 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4
LT		 183 struct sock *sk;
184 int err;
185
186 if (!capable(CAP_NET_ADMIN))
187 return -EPERM;
188 if (sock->type != SOCK_RAW)
189 return -ESOCKTNOSUPPORT;
190 if (protocol != PF_KEY_V2)
191 return -EPROTONOSUPPORT;
192
193 err = -ENOMEM;
6257ff21 194 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
1da177e4
LT		 195 if (sk == NULL)
196 goto out;
8ff24541 197
1da177e4
LT		 198 sock->ops = &pfkey_ops;
199 sock_init_data(sock, sk);
200
201 sk->sk_family = PF_KEY;
202 sk->sk_destruct = pfkey_sock_destruct;
203
3fa87a32 204 atomic_inc(&net_pfkey->socks_nr);
1da177e4
LT		 205
206 pfkey_insert(sk);
207
208 return 0;
209out:
210 return err;
211}
212
213static int pfkey_release(struct socket *sock)
214{
215 struct sock *sk = sock->sk;
216
217 if (!sk)
218 return 0;
219
220 pfkey_remove(sk);
221
222 sock_orphan(sk);
223 sock->sk = NULL;
224 skb_queue_purge(&sk->sk_write_queue);
225 sock_put(sk);
226
227 return 0;
228}
229
230static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
dd0fc66f 231 gfp_t allocation, struct sock *sk)
1da177e4
LT		 232{
233 int err = -ENOBUFS;
234
235 sock_hold(sk);
236 if (*skb2 == NULL) {
237 if (atomic_read(&skb->users) != 1) {
238 *skb2 = skb_clone(skb, allocation);
239 } else {
240 *skb2 = skb;
241 atomic_inc(&skb->users);
242 }
243 }
244 if (*skb2 != NULL) {
245 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
246 skb_orphan(*skb2);
247 skb_set_owner_r(*skb2, sk);
248 skb_queue_tail(&sk->sk_receive_queue, *skb2);
249 sk->sk_data_ready(sk, (*skb2)->len);
250 *skb2 = NULL;
251 err = 0;
252 }
253 }
254 sock_put(sk);
255 return err;
256}
257
258/* Send SKB to all pfkey sockets matching selected criteria. */
259#define BROADCAST_ALL 0
260#define BROADCAST_ONE 1
261#define BROADCAST_REGISTERED 2
262#define BROADCAST_PROMISC_ONLY 4
dd0fc66f 263static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
1da177e4
LT		 264 int broadcast_flags, struct sock *one_sk)
265{
3fa87a32
AD		 266 struct net *net = &init_net;
267 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4
LT		 268 struct sock *sk;
269 struct hlist_node *node;
270 struct sk_buff *skb2 = NULL;
271 int err = -ESRCH;
272
273 /* XXX Do we need something like netlink_overrun? I think
274 * XXX PF_KEY socket apps will not mind current behavior.
275 */
276 if (!skb)
277 return -ENOMEM;
278
279 pfkey_lock_table();
3fa87a32 280 sk_for_each(sk, node, &net_pfkey->table) {
1da177e4
LT		 281 struct pfkey_sock *pfk = pfkey_sk(sk);
282 int err2;
283
284 /* Yes, it means that if you are meant to receive this
285 * pfkey message you receive it twice as promiscuous
286 * socket.
287 */
288 if (pfk->promisc)
289 pfkey_broadcast_one(skb, &skb2, allocation, sk);
290
291 /* the exact target will be processed later */
292 if (sk == one_sk)
293 continue;
294 if (broadcast_flags != BROADCAST_ALL) {
295 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
296 continue;
297 if ((broadcast_flags & BROADCAST_REGISTERED) &&
298 !pfk->registered)
299 continue;
300 if (broadcast_flags & BROADCAST_ONE)
301 continue;
302 }
303
304 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
305
306 /* Error is cleare after succecful sending to at least one
307 * registered KM */
308 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
309 err = err2;
310 }
311 pfkey_unlock_table();
312
313 if (one_sk != NULL)
314 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
315
316 if (skb2)
317 kfree_skb(skb2);
318 kfree_skb(skb);
319 return err;
320}
321
05238204
TT		 322static int pfkey_do_dump(struct pfkey_sock *pfk)
323{
12a169e7 324 struct sadb_msg *hdr;
05238204
TT		 325 int rc;
326
327 rc = pfk->dump.dump(pfk);
328 if (rc == -ENOBUFS)
329 return 0;
330
12a169e7
HX		 331 if (pfk->dump.skb) {
332 if (!pfkey_can_dump(&pfk->sk))
333 return 0;
334
335 hdr = (struct sadb_msg *) pfk->dump.skb->data;
336 hdr->sadb_msg_seq = 0;
337 hdr->sadb_msg_errno = rc;
338 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
339 &pfk->sk);
340 pfk->dump.skb = NULL;
341 }
342
05238204
TT		 343 pfkey_terminate_dump(pfk);
344 return rc;
345}
346
1da177e4
LT		 347static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
348{
349 *new = *orig;
350}
351
352static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
353{
354 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
355 struct sadb_msg *hdr;
356
357 if (!skb)
358 return -ENOBUFS;
359
360 /* Woe be to the platform trying to support PFKEY yet
361 * having normal errnos outside the 1-255 range, inclusive.
362 */
363 err = -err;
364 if (err == ERESTARTSYS ||
365 err == ERESTARTNOHAND ||
366 err == ERESTARTNOINTR)
367 err = EINTR;
368 if (err >= 512)
369 err = EINVAL;
09a62660 370 BUG_ON(err <= 0 || err >= 256);
1da177e4
LT		 371
372 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
373 pfkey_hdr_dup(hdr, orig);
374 hdr->sadb_msg_errno = (uint8_t) err;
375 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
376 sizeof(uint64_t));
377
378 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
379
380 return 0;
381}
382
383static u8 sadb_ext_min_len[] = {
384 [SADB_EXT_RESERVED] = (u8) 0,
385 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
386 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
387 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
388 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
389 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
390 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
391 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
392 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
393 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
394 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
395 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
396 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
397 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
398 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
399 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
400 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
401 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
402 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
403 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
404 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
405 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
406 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
407 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
df71837d 408 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
13c1d189 409 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
1da177e4
LT		 410};
411
412/* Verify sadb_address_{len,prefixlen} against sa_family. */
413static int verify_address_len(void *p)
414{
415 struct sadb_address *sp = p;
416 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
417 struct sockaddr_in *sin;
418#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
419 struct sockaddr_in6 *sin6;
420#endif
421 int len;
422
423 switch (addr->sa_family) {
424 case AF_INET:
356f89e1 425 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
1da177e4
LT		 426 if (sp->sadb_address_len != len ||
427 sp->sadb_address_prefixlen > 32)
428 return -EINVAL;
429 break;
430#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
431 case AF_INET6:
356f89e1 432 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
1da177e4
LT		 433 if (sp->sadb_address_len != len ||
434 sp->sadb_address_prefixlen > 128)
435 return -EINVAL;
436 break;
437#endif
438 default:
439 /* It is user using kernel to keep track of security
440 * associations for another protocol, such as
441 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
442 * lengths.
443 *
444 * XXX Actually, association/policy database is not yet
445 * XXX able to cope with arbitrary sockaddr families.
446 * XXX When it can, remove this -EINVAL. -DaveM
447 */
448 return -EINVAL;
449 break;
3ff50b79 450 }
1da177e4
LT		 451
452 return 0;
453}
454
df71837d
TJ		 455static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
456{
356f89e1
IJ		 457 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
458 sec_ctx->sadb_x_ctx_len,
459 sizeof(uint64_t));
df71837d
TJ		 460}
461
462static inline int verify_sec_ctx_len(void *p)
463{
464 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
298bb621 465 int len = sec_ctx->sadb_x_ctx_len;
df71837d 466
298bb621 467 if (len > PAGE_SIZE)
df71837d
TJ		 468 return -EINVAL;
469
470 len = pfkey_sec_ctx_len(sec_ctx);
471
472 if (sec_ctx->sadb_x_sec_len != len)
473 return -EINVAL;
474
475 return 0;
476}
477
478static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
479{
480 struct xfrm_user_sec_ctx *uctx = NULL;
481 int ctx_size = sec_ctx->sadb_x_ctx_len;
482
483 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
484
485 if (!uctx)
486 return NULL;
487
488 uctx->len = pfkey_sec_ctx_len(sec_ctx);
489 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
490 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
491 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
492 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
493 memcpy(uctx + 1, sec_ctx + 1,
494 uctx->ctx_len);
495
496 return uctx;
497}
498
1da177e4
LT		 499static int present_and_same_family(struct sadb_address *src,
500 struct sadb_address *dst)
501{
502 struct sockaddr *s_addr, *d_addr;
503
504 if (!src || !dst)
505 return 0;
506
507 s_addr = (struct sockaddr *)(src + 1);
508 d_addr = (struct sockaddr *)(dst + 1);
509 if (s_addr->sa_family != d_addr->sa_family)
510 return 0;
511 if (s_addr->sa_family != AF_INET
512#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
513 && s_addr->sa_family != AF_INET6
514#endif
515 )
516 return 0;
517
518 return 1;
519}
520
521static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
522{
523 char *p = (char *) hdr;
524 int len = skb->len;
525
526 len -= sizeof(*hdr);
527 p += sizeof(*hdr);
528 while (len > 0) {
529 struct sadb_ext *ehdr = (struct sadb_ext *) p;
530 uint16_t ext_type;
531 int ext_len;
532
533 ext_len = ehdr->sadb_ext_len;
534 ext_len *= sizeof(uint64_t);
535 ext_type = ehdr->sadb_ext_type;
536 if (ext_len < sizeof(uint64_t) ||
537 ext_len > len ||
538 ext_type == SADB_EXT_RESERVED)
539 return -EINVAL;
540
541 if (ext_type <= SADB_EXT_MAX) {
542 int min = (int) sadb_ext_min_len[ext_type];
543 if (ext_len < min)
544 return -EINVAL;
545 if (ext_hdrs[ext_type-1] != NULL)
546 return -EINVAL;
547 if (ext_type == SADB_EXT_ADDRESS_SRC ||
548 ext_type == SADB_EXT_ADDRESS_DST ||
549 ext_type == SADB_EXT_ADDRESS_PROXY ||
550 ext_type == SADB_X_EXT_NAT_T_OA) {
551 if (verify_address_len(p))
552 return -EINVAL;
8ff24541 553 }
df71837d
TJ		 554 if (ext_type == SADB_X_EXT_SEC_CTX) {
555 if (verify_sec_ctx_len(p))
556 return -EINVAL;
557 }
1da177e4
LT		 558 ext_hdrs[ext_type-1] = p;
559 }
560 p += ext_len;
561 len -= ext_len;
562 }
563
564 return 0;
565}
566
567static uint16_t
568pfkey_satype2proto(uint8_t satype)
569{
570 switch (satype) {
571 case SADB_SATYPE_UNSPEC:
572 return IPSEC_PROTO_ANY;
573 case SADB_SATYPE_AH:
574 return IPPROTO_AH;
575 case SADB_SATYPE_ESP:
576 return IPPROTO_ESP;
577 case SADB_X_SATYPE_IPCOMP:
578 return IPPROTO_COMP;
579 break;
580 default:
581 return 0;
582 }
583 /* NOTREACHED */
584}
585
586static uint8_t
587pfkey_proto2satype(uint16_t proto)
588{
589 switch (proto) {
590 case IPPROTO_AH:
591 return SADB_SATYPE_AH;
592 case IPPROTO_ESP:
593 return SADB_SATYPE_ESP;
594 case IPPROTO_COMP:
595 return SADB_X_SATYPE_IPCOMP;
596 break;
597 default:
598 return 0;
599 }
600 /* NOTREACHED */
601}
602
603/* BTW, this scheme means that there is no way with PFKEY2 sockets to
604 * say specifically 'just raw sockets' as we encode them as 255.
605 */
606
607static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
608{
609 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
610}
611
612static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
613{
614 return (proto ? proto : IPSEC_PROTO_ANY);
615}
616
9e8b4ed8
YH		 617static inline int pfkey_sockaddr_len(sa_family_t family)
618{
619 switch (family) {
620 case AF_INET:
621 return sizeof(struct sockaddr_in);
622#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
623 case AF_INET6:
624 return sizeof(struct sockaddr_in6);
625#endif
626 }
627 return 0;
628}
629
5f95ac91
YH		 630static
631int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
1da177e4 632{
5f95ac91 633 switch (sa->sa_family) {
1da177e4 634 case AF_INET:
8ff24541 635 xaddr->a4 =
5f95ac91 636 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
1da177e4
LT		 637 return AF_INET;
638#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
639 case AF_INET6:
8ff24541 640 memcpy(xaddr->a6,
5f95ac91 641 &((struct sockaddr_in6 *)sa)->sin6_addr,
1da177e4
LT		 642 sizeof(struct in6_addr));
643 return AF_INET6;
644#endif
1da177e4 645 }
5f95ac91
YH		 646 return 0;
647}
648
649static
650int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
651{
652 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
653 xaddr);
1da177e4
LT		 654}
655
656static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
657{
658 struct sadb_sa *sa;
659 struct sadb_address *addr;
660 uint16_t proto;
661 unsigned short family;
662 xfrm_address_t *xaddr;
663
664 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
665 if (sa == NULL)
666 return NULL;
667
668 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
669 if (proto == 0)
670 return NULL;
671
672 /* sadb_address_len should be checked by caller */
673 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
674 if (addr == NULL)
675 return NULL;
676
677 family = ((struct sockaddr *)(addr + 1))->sa_family;
678 switch (family) {
679 case AF_INET:
680 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
681 break;
682#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
683 case AF_INET6:
684 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
685 break;
686#endif
687 default:
688 xaddr = NULL;
689 }
690
691 if (!xaddr)
692 return NULL;
693
221df1ed 694 return xfrm_state_lookup(&init_net, xaddr, sa->sadb_sa_spi, proto, family);
1da177e4
LT		 695}
696
697#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
9e8b4ed8 698
1da177e4
LT		 699static int
700pfkey_sockaddr_size(sa_family_t family)
701{
9e8b4ed8 702 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
1da177e4
LT		 703}
704
55569ce2
KM		 705static inline int pfkey_mode_from_xfrm(int mode)
706{
707 switch(mode) {
708 case XFRM_MODE_TRANSPORT:
709 return IPSEC_MODE_TRANSPORT;
710 case XFRM_MODE_TUNNEL:
711 return IPSEC_MODE_TUNNEL;
712 case XFRM_MODE_BEET:
713 return IPSEC_MODE_BEET;
714 default:
715 return -1;
716 }
717}
718
719static inline int pfkey_mode_to_xfrm(int mode)
720{
721 switch(mode) {
722 case IPSEC_MODE_ANY: /*XXX*/
723 case IPSEC_MODE_TRANSPORT:
724 return XFRM_MODE_TRANSPORT;
725 case IPSEC_MODE_TUNNEL:
726 return XFRM_MODE_TUNNEL;
727 case IPSEC_MODE_BEET:
728 return XFRM_MODE_BEET;
729 default:
730 return -1;
731 }
732}
733
e5b56652
YH		 734static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port,
735 struct sockaddr *sa,
736 unsigned short family)
737{
738 switch (family) {
739 case AF_INET:
740 {
741 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
742 sin->sin_family = AF_INET;
743 sin->sin_port = port;
744 sin->sin_addr.s_addr = xaddr->a4;
745 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
746 return 32;
747 }
748#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
749 case AF_INET6:
750 {
751 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
752 sin6->sin6_family = AF_INET6;
753 sin6->sin6_port = port;
754 sin6->sin6_flowinfo = 0;
755 ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6);
756 sin6->sin6_scope_id = 0;
757 return 128;
758 }
759#endif
760 }
761 return 0;
762}
763
050f009e
HX		 764static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
765 int add_keys, int hsc)
1da177e4
LT		 766{
767 struct sk_buff *skb;
768 struct sadb_msg *hdr;
769 struct sadb_sa *sa;
770 struct sadb_lifetime *lifetime;
771 struct sadb_address *addr;
772 struct sadb_key *key;
773 struct sadb_x_sa2 *sa2;
df71837d
TJ		 774 struct sadb_x_sec_ctx *sec_ctx;
775 struct xfrm_sec_ctx *xfrm_ctx;
776 int ctx_size = 0;
1da177e4
LT		 777 int size;
778 int auth_key_size = 0;
779 int encrypt_key_size = 0;
780 int sockaddr_size;
781 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 782 int mode;
1da177e4
LT		 783
784 /* address family check */
785 sockaddr_size = pfkey_sockaddr_size(x->props.family);
786 if (!sockaddr_size)
787 return ERR_PTR(-EINVAL);
788
789 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
790 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 791 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 792 sizeof(struct sadb_lifetime) +
793 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
794 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 795 sizeof(struct sadb_address)*2 +
1da177e4
LT		 796 sockaddr_size*2 +
797 sizeof(struct sadb_x_sa2);
df71837d
TJ		 798
799 if ((xfrm_ctx = x->security)) {
800 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
801 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
802 }
803
1da177e4 804 /* identity & sensitivity */
81b302a3 805 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
1da177e4
LT		 806 size += sizeof(struct sadb_address) + sockaddr_size;
807
808 if (add_keys) {
809 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 810 auth_key_size =
811 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 812 size += sizeof(struct sadb_key) + auth_key_size;
813 }
814 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 815 encrypt_key_size =
816 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 817 size += sizeof(struct sadb_key) + encrypt_key_size;
818 }
819 }
820 if (x->encap)
821 natt = x->encap;
822
823 if (natt && natt->encap_type) {
824 size += sizeof(struct sadb_x_nat_t_type);
825 size += sizeof(struct sadb_x_nat_t_port);
826 size += sizeof(struct sadb_x_nat_t_port);
827 }
828
829 skb = alloc_skb(size + 16, GFP_ATOMIC);
830 if (skb == NULL)
831 return ERR_PTR(-ENOBUFS);
832
833 /* call should fill header later */
834 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
835 memset(hdr, 0, size); /* XXX do we need this ? */
836 hdr->sadb_msg_len = size / sizeof(uint64_t);
837
838 /* sa */
839 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
840 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
841 sa->sadb_sa_exttype = SADB_EXT_SA;
842 sa->sadb_sa_spi = x->id.spi;
843 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 844 switch (x->km.state) {
845 case XFRM_STATE_VALID:
846 sa->sadb_sa_state = x->km.dying ?
847 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
848 break;
849 case XFRM_STATE_ACQ:
1da177e4 850 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 851 break;
852 default:
1da177e4 853 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 854 break;
855 }
1da177e4
LT		 856 sa->sadb_sa_auth = 0;
857 if (x->aalg) {
858 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
859 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
860 }
861 sa->sadb_sa_encrypt = 0;
862 BUG_ON(x->ealg && x->calg);
863 if (x->ealg) {
864 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
865 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
866 }
867 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
868 if (x->calg) {
869 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
870 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
871 }
872
873 sa->sadb_sa_flags = 0;
874 if (x->props.flags & XFRM_STATE_NOECN)
875 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
876 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
877 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 878 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
879 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 880
881 /* hard time */
882 if (hsc & 2) {
8ff24541 883 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 884 sizeof(struct sadb_lifetime));
885 lifetime->sadb_lifetime_len =
886 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
887 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
888 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
889 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
890 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
891 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
892 }
893 /* soft time */
894 if (hsc & 1) {
8ff24541 895 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 896 sizeof(struct sadb_lifetime));
897 lifetime->sadb_lifetime_len =
898 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
899 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
900 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
901 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
902 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
903 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
904 }
905 /* current time */
906 lifetime = (struct sadb_lifetime *) skb_put(skb,
907 sizeof(struct sadb_lifetime));
908 lifetime->sadb_lifetime_len =
909 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
910 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
911 lifetime->sadb_lifetime_allocations = x->curlft.packets;
912 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
913 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
914 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
915 /* src address */
8ff24541 916 addr = (struct sadb_address*) skb_put(skb,
1da177e4 917 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 918 addr->sadb_address_len =
1da177e4
LT		 919 (sizeof(struct sadb_address)+sockaddr_size)/
920 sizeof(uint64_t);
921 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 922 /* "if the ports are non-zero, then the sadb_address_proto field,
923 normally zero, MUST be filled in with the transport
1da177e4 924 protocol's number." - RFC2367 */
8ff24541 925 addr->sadb_address_proto = 0;
1da177e4 926 addr->sadb_address_reserved = 0;
1da177e4 927
e5b56652
YH		 928 addr->sadb_address_prefixlen =
929 pfkey_sockaddr_fill(&x->props.saddr, 0,
930 (struct sockaddr *) (addr + 1),
931 x->props.family);
932 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 933 BUG();
934
935 /* dst address */
8ff24541 936 addr = (struct sadb_address*) skb_put(skb,
1da177e4 937 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 938 addr->sadb_address_len =
1da177e4
LT		 939 (sizeof(struct sadb_address)+sockaddr_size)/
940 sizeof(uint64_t);
941 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
8ff24541 942 addr->sadb_address_proto = 0;
1da177e4 943 addr->sadb_address_reserved = 0;
1da177e4 944
e5b56652
YH		 945 addr->sadb_address_prefixlen =
946 pfkey_sockaddr_fill(&x->id.daddr, 0,
947 (struct sockaddr *) (addr + 1),
948 x->props.family);
949 if (!addr->sadb_address_prefixlen)
950 BUG();
1da177e4 951
e5b56652
YH		 952 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
953 x->props.family)) {
954 addr = (struct sadb_address*) skb_put(skb,
955 sizeof(struct sadb_address)+sockaddr_size);
956 addr->sadb_address_len =
957 (sizeof(struct sadb_address)+sockaddr_size)/
958 sizeof(uint64_t);
959 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
960 addr->sadb_address_proto =
961 pfkey_proto_from_xfrm(x->sel.proto);
962 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
963 addr->sadb_address_reserved = 0;
1da177e4 964
e5b56652
YH		 965 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
966 (struct sockaddr *) (addr + 1),
967 x->props.family);
1da177e4 968 }
1da177e4
LT		 969
970 /* auth key */
971 if (add_keys && auth_key_size) {
8ff24541 972 key = (struct sadb_key *) skb_put(skb,
1da177e4
LT		 973 sizeof(struct sadb_key)+auth_key_size);
974 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
975 sizeof(uint64_t);
976 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
977 key->sadb_key_bits = x->aalg->alg_key_len;
978 key->sadb_key_reserved = 0;
979 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
980 }
981 /* encrypt key */
982 if (add_keys && encrypt_key_size) {
8ff24541 983 key = (struct sadb_key *) skb_put(skb,
1da177e4 984 sizeof(struct sadb_key)+encrypt_key_size);
8ff24541 985 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 986 encrypt_key_size) / sizeof(uint64_t);
987 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
988 key->sadb_key_bits = x->ealg->alg_key_len;
989 key->sadb_key_reserved = 0;
8ff24541 990 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 991 (x->ealg->alg_key_len+7)/8);
992 }
993
994 /* sa */
995 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
996 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
997 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 998 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
999 kfree_skb(skb);
1000 return ERR_PTR(-EINVAL);
1001 }
1002 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 1003 sa2->sadb_x_sa2_reserved1 = 0;
1004 sa2->sadb_x_sa2_reserved2 = 0;
1005 sa2->sadb_x_sa2_sequence = 0;
1006 sa2->sadb_x_sa2_reqid = x->props.reqid;
1007
1008 if (natt && natt->encap_type) {
1009 struct sadb_x_nat_t_type *n_type;
1010 struct sadb_x_nat_t_port *n_port;
1011
1012 /* type */
1013 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
1014 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1015 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1016 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1017 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1018 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1019 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1020
1021 /* source port */
1022 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1023 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1024 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1025 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1026 n_port->sadb_x_nat_t_port_reserved = 0;
1027
1028 /* dest port */
1029 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1030 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1031 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1032 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1033 n_port->sadb_x_nat_t_port_reserved = 0;
1034 }
1035
df71837d
TJ		 1036 /* security context */
1037 if (xfrm_ctx) {
1038 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1039 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1040 sec_ctx->sadb_x_sec_len =
1041 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1042 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1043 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1044 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1045 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1046 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1047 xfrm_ctx->ctx_len);
1048 }
1049
1da177e4
LT		 1050 return skb;
1051}
1052
050f009e
HX		 1053
1054static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1055{
1056 struct sk_buff *skb;
1057
050f009e 1058 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1059
1060 return skb;
1061}
1062
1063static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1064 int hsc)
1065{
1066 return __pfkey_xfrm_state2msg(x, 0, hsc);
1067}
1068
8ff24541 1069static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
1da177e4
LT		 1070 void **ext_hdrs)
1071{
8ff24541 1072 struct xfrm_state *x;
1da177e4
LT		 1073 struct sadb_lifetime *lifetime;
1074 struct sadb_sa *sa;
1075 struct sadb_key *key;
df71837d 1076 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1077 uint16_t proto;
1078 int err;
8ff24541 1079
1da177e4
LT		 1080
1081 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1082 if (!sa ||
1083 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1084 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1085 return ERR_PTR(-EINVAL);
1086 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1087 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1088 return ERR_PTR(-EINVAL);
1089 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1090 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1091 return ERR_PTR(-EINVAL);
1092 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1093 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1094 return ERR_PTR(-EINVAL);
1095
1096 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1097 if (proto == 0)
1098 return ERR_PTR(-EINVAL);
1099
1100 /* default error is no buffer space */
1101 err = -ENOBUFS;
1102
1103 /* RFC2367:
1104
1105 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1106 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1107 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1108 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1109 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1110 not true.
1111
8ff24541 1112 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1113 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1114 */
1115 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1116 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1117 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1118 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1119 return ERR_PTR(-EINVAL);
1120 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1121 if (key != NULL &&
1122 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1123 ((key->sadb_key_bits+7) / 8 == 0 ||
1124 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1125 return ERR_PTR(-EINVAL);
1126 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1127 if (key != NULL &&
1128 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1129 ((key->sadb_key_bits+7) / 8 == 0 ||
1130 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1131 return ERR_PTR(-EINVAL);
1132
673c09be 1133 x = xfrm_state_alloc(&init_net);
1da177e4
LT		 1134 if (x == NULL)
1135 return ERR_PTR(-ENOBUFS);
1136
1137 x->id.proto = proto;
1138 x->id.spi = sa->sadb_sa_spi;
1139 x->props.replay_window = sa->sadb_sa_replay;
1140 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1141 x->props.flags |= XFRM_STATE_NOECN;
1142 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1143 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1144 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1145 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4
LT		 1146
1147 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1148 if (lifetime != NULL) {
1149 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1150 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1151 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1152 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1153 }
1154 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1155 if (lifetime != NULL) {
1156 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1157 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1158 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1159 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1160 }
df71837d
TJ		 1161
1162 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1163 if (sec_ctx != NULL) {
1164 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1165
1166 if (!uctx)
1167 goto out;
1168
1169 err = security_xfrm_state_alloc(x, uctx);
1170 kfree(uctx);
1171
1172 if (err)
1173 goto out;
1174 }
1175
1da177e4
LT		 1176 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1177 if (sa->sadb_sa_auth) {
1178 int keysize = 0;
1179 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1180 if (!a) {
1181 err = -ENOSYS;
1182 goto out;
1183 }
1184 if (key)
1185 keysize = (key->sadb_key_bits + 7) / 8;
1186 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1187 if (!x->aalg)
1188 goto out;
1189 strcpy(x->aalg->alg_name, a->name);
1190 x->aalg->alg_key_len = 0;
1191 if (key) {
1192 x->aalg->alg_key_len = key->sadb_key_bits;
1193 memcpy(x->aalg->alg_key, key+1, keysize);
1194 }
1195 x->props.aalgo = sa->sadb_sa_auth;
1196 /* x->algo.flags = sa->sadb_sa_flags; */
1197 }
1198 if (sa->sadb_sa_encrypt) {
1199 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1200 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1201 if (!a) {
1202 err = -ENOSYS;
1203 goto out;
1204 }
1205 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1206 if (!x->calg)
1207 goto out;
1208 strcpy(x->calg->alg_name, a->name);
1209 x->props.calgo = sa->sadb_sa_encrypt;
1210 } else {
1211 int keysize = 0;
1212 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1213 if (!a) {
1214 err = -ENOSYS;
1215 goto out;
1216 }
1217 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1218 if (key)
1219 keysize = (key->sadb_key_bits + 7) / 8;
1220 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1221 if (!x->ealg)
1222 goto out;
1223 strcpy(x->ealg->alg_name, a->name);
1224 x->ealg->alg_key_len = 0;
1225 if (key) {
1226 x->ealg->alg_key_len = key->sadb_key_bits;
1227 memcpy(x->ealg->alg_key, key+1, keysize);
1228 }
1229 x->props.ealgo = sa->sadb_sa_encrypt;
1230 }
1231 }
1232 /* x->algo.flags = sa->sadb_sa_flags; */
1233
8ff24541 1234 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 1235 &x->props.saddr);
1236 if (!x->props.family) {
1237 err = -EAFNOSUPPORT;
1238 goto out;
1239 }
8ff24541 1240 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1241 &x->id.daddr);
1242
1243 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1244 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1245 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1246 if (mode < 0) {
1247 err = -EINVAL;
1248 goto out;
1249 }
1250 x->props.mode = mode;
1da177e4
LT		 1251 x->props.reqid = sa2->sadb_x_sa2_reqid;
1252 }
1253
1254 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1255 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1256
1257 /* Nobody uses this, but we try. */
1258 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1259 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1260 }
1261
4da51056 1262 if (!x->sel.family)
4a4b6271
JL		 1263 x->sel.family = x->props.family;
1264
1da177e4
LT		 1265 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1266 struct sadb_x_nat_t_type* n_type;
1267 struct xfrm_encap_tmpl *natt;
1268
1269 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1270 if (!x->encap)
1271 goto out;
1272
1273 natt = x->encap;
1274 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1275 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1276
1277 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1278 struct sadb_x_nat_t_port* n_port =
1279 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1280 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1281 }
1282 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1283 struct sadb_x_nat_t_port* n_port =
1284 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1285 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1286 }
1287 }
1288
72cb6962
HX		 1289 err = xfrm_init_state(x);
1290 if (err)
1da177e4 1291 goto out;
72cb6962 1292
1da177e4 1293 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1294 return x;
1295
1296out:
1297 x->km.state = XFRM_STATE_DEAD;
1298 xfrm_state_put(x);
1299 return ERR_PTR(err);
1300}
1301
1302static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1303{
1304 return -EOPNOTSUPP;
1305}
1306
1307static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1308{
1309 struct sk_buff *resp_skb;
1310 struct sadb_x_sa2 *sa2;
1311 struct sadb_address *saddr, *daddr;
1312 struct sadb_msg *out_hdr;
658b219e 1313 struct sadb_spirange *range;
1da177e4 1314 struct xfrm_state *x = NULL;
55569ce2 1315 int mode;
658b219e
HX		 1316 int err;
1317 u32 min_spi, max_spi;
1da177e4
LT		 1318 u32 reqid;
1319 u8 proto;
1320 unsigned short family;
1321 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1322
1323 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1324 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1325 return -EINVAL;
1326
1327 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1328 if (proto == 0)
1329 return -EINVAL;
1330
1331 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1332 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1333 if (mode < 0)
1334 return -EINVAL;
1da177e4
LT		 1335 reqid = sa2->sadb_x_sa2_reqid;
1336 } else {
1337 mode = 0;
1338 reqid = 0;
1339 }
1340
1341 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1342 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1343
1344 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1345 switch (family) {
1346 case AF_INET:
1347 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1348 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1349 break;
1350#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1351 case AF_INET6:
1352 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1353 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1354 break;
1355#endif
1356 }
1357
1358 if (hdr->sadb_msg_seq) {
5447c5e4 1359 x = xfrm_find_acq_byseq(&init_net, hdr->sadb_msg_seq);
1da177e4
LT		 1360 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1361 xfrm_state_put(x);
1362 x = NULL;
1363 }
1364 }
1365
1366 if (!x)
5447c5e4 1367 x = xfrm_find_acq(&init_net, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1da177e4
LT		 1368
1369 if (x == NULL)
1370 return -ENOENT;
1371
658b219e
HX		 1372 min_spi = 0x100;
1373 max_spi = 0x0fffffff;
1da177e4 1374
658b219e
HX		 1375 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1376 if (range) {
1377 min_spi = range->sadb_spirange_min;
1378 max_spi = range->sadb_spirange_max;
1da177e4 1379 }
658b219e
HX		 1380
1381 err = xfrm_alloc_spi(x, min_spi, max_spi);
050f009e 1382 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1383
1384 if (IS_ERR(resp_skb)) {
1385 xfrm_state_put(x);
1386 return PTR_ERR(resp_skb);
1387 }
1388
1389 out_hdr = (struct sadb_msg *) resp_skb->data;
1390 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1391 out_hdr->sadb_msg_type = SADB_GETSPI;
1392 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1393 out_hdr->sadb_msg_errno = 0;
1394 out_hdr->sadb_msg_reserved = 0;
1395 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1396 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1397
1398 xfrm_state_put(x);
1399
1400 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
1401
1402 return 0;
1403}
1404
1405static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1406{
1407 struct xfrm_state *x;
1408
1409 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1410 return -EOPNOTSUPP;
1411
1412 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1413 return 0;
1414
5447c5e4 1415 x = xfrm_find_acq_byseq(&init_net, hdr->sadb_msg_seq);
1da177e4
LT		 1416 if (x == NULL)
1417 return 0;
1418
1419 spin_lock_bh(&x->lock);
1420 if (x->km.state == XFRM_STATE_ACQ) {
1421 x->km.state = XFRM_STATE_ERROR;
50a30657 1422 wake_up(&init_net.xfrm.km_waitq);
1da177e4
LT		 1423 }
1424 spin_unlock_bh(&x->lock);
1425 xfrm_state_put(x);
1426 return 0;
1427}
1428
26b15dad
JHS		 1429static inline int event2poltype(int event)
1430{
1431 switch (event) {
f60f6b8f 1432 case XFRM_MSG_DELPOLICY:
26b15dad 1433 return SADB_X_SPDDELETE;
f60f6b8f 1434 case XFRM_MSG_NEWPOLICY:
26b15dad 1435 return SADB_X_SPDADD;
f60f6b8f 1436 case XFRM_MSG_UPDPOLICY:
26b15dad 1437 return SADB_X_SPDUPDATE;
f60f6b8f 1438 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1439 // return SADB_X_SPDEXPIRE;
1440 default:
1441 printk("pfkey: Unknown policy event %d\n", event);
1442 break;
1443 }
1444
1445 return 0;
1446}
1447
1448static inline int event2keytype(int event)
1449{
1450 switch (event) {
f60f6b8f 1451 case XFRM_MSG_DELSA:
26b15dad 1452 return SADB_DELETE;
f60f6b8f 1453 case XFRM_MSG_NEWSA:
26b15dad 1454 return SADB_ADD;
f60f6b8f 1455 case XFRM_MSG_UPDSA:
26b15dad 1456 return SADB_UPDATE;
f60f6b8f 1457 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1458 return SADB_EXPIRE;
1459 default:
1460 printk("pfkey: Unknown SA event %d\n", event);
1461 break;
1462 }
1463
1464 return 0;
1465}
1466
1467/* ADD/UPD/DEL */
1468static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1469{
1470 struct sk_buff *skb;
1471 struct sadb_msg *hdr;
26b15dad 1472
050f009e 1473 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1474
1475 if (IS_ERR(skb))
1476 return PTR_ERR(skb);
1477
1478 hdr = (struct sadb_msg *) skb->data;
1479 hdr->sadb_msg_version = PF_KEY_V2;
1480 hdr->sadb_msg_type = event2keytype(c->event);
1481 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1482 hdr->sadb_msg_errno = 0;
1483 hdr->sadb_msg_reserved = 0;
1484 hdr->sadb_msg_seq = c->seq;
1485 hdr->sadb_msg_pid = c->pid;
1486
1487 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1488
1489 return 0;
1490}
1da177e4
LT		 1491
1492static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1493{
1da177e4
LT		 1494 struct xfrm_state *x;
1495 int err;
26b15dad 1496 struct km_event c;
1da177e4 1497
1da177e4
LT		 1498 x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
1499 if (IS_ERR(x))
1500 return PTR_ERR(x);
1501
26b15dad 1502 xfrm_state_hold(x);
1da177e4
LT		 1503 if (hdr->sadb_msg_type == SADB_ADD)
1504 err = xfrm_state_add(x);
1505 else
1506 err = xfrm_state_update(x);
1507
ab5f5e8b 1508 xfrm_audit_state_add(x, err ? 0 : 1,
2532386f
EP		 1509 audit_get_loginuid(current),
1510 audit_get_sessionid(current), 0);
161a09e7 1511
1da177e4
LT		 1512 if (err < 0) {
1513 x->km.state = XFRM_STATE_DEAD;
21380b81 1514 __xfrm_state_put(x);
7d6dfe1f 1515 goto out;
1da177e4
LT		 1516 }
1517
26b15dad 1518 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1519 c.event = XFRM_MSG_NEWSA;
26b15dad 1520 else
f60f6b8f 1521 c.event = XFRM_MSG_UPDSA;
26b15dad
JHS		 1522 c.seq = hdr->sadb_msg_seq;
1523 c.pid = hdr->sadb_msg_pid;
1524 km_state_notify(x, &c);
7d6dfe1f 1525out:
26b15dad 1526 xfrm_state_put(x);
26b15dad 1527 return err;
1da177e4
LT		 1528}
1529
1530static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1531{
1532 struct xfrm_state *x;
26b15dad
JHS		 1533 struct km_event c;
1534 int err;
1da177e4
LT		 1535
1536 if (!ext_hdrs[SADB_EXT_SA-1] ||
1537 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1538 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1539 return -EINVAL;
1540
1541 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1542 if (x == NULL)
1543 return -ESRCH;
1544
c8c05a8e
CZ		 1545 if ((err = security_xfrm_state_delete(x)))
1546 goto out;
1547
1da177e4 1548 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1549 err = -EPERM;
1550 goto out;
1da177e4 1551 }
161a09e7 1552
26b15dad 1553 err = xfrm_state_delete(x);
161a09e7 1554
c8c05a8e
CZ		 1555 if (err < 0)
1556 goto out;
1da177e4 1557
26b15dad
JHS		 1558 c.seq = hdr->sadb_msg_seq;
1559 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1560 c.event = XFRM_MSG_DELSA;
26b15dad 1561 km_state_notify(x, &c);
c8c05a8e 1562out:
ab5f5e8b 1563 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 1564 audit_get_loginuid(current),
1565 audit_get_sessionid(current), 0);
26b15dad 1566 xfrm_state_put(x);
1da177e4 1567
26b15dad 1568 return err;
1da177e4
LT		 1569}
1570
1571static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1572{
1573 __u8 proto;
1574 struct sk_buff *out_skb;
1575 struct sadb_msg *out_hdr;
1576 struct xfrm_state *x;
1577
1578 if (!ext_hdrs[SADB_EXT_SA-1] ||
1579 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1580 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1581 return -EINVAL;
1582
1583 x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
1584 if (x == NULL)
1585 return -ESRCH;
1586
050f009e 1587 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1588 proto = x->id.proto;
1589 xfrm_state_put(x);
1590 if (IS_ERR(out_skb))
1591 return PTR_ERR(out_skb);
1592
1593 out_hdr = (struct sadb_msg *) out_skb->data;
1594 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1595 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1596 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1597 out_hdr->sadb_msg_errno = 0;
1598 out_hdr->sadb_msg_reserved = 0;
1599 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1600 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1601 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1602
1603 return 0;
1604}
1605
00fa0233 1606static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
dd0fc66f 1607 gfp_t allocation)
1da177e4
LT		 1608{
1609 struct sk_buff *skb;
1610 struct sadb_msg *hdr;
1611 int len, auth_len, enc_len, i;
1612
1613 auth_len = xfrm_count_auth_supported();
1614 if (auth_len) {
1615 auth_len *= sizeof(struct sadb_alg);
1616 auth_len += sizeof(struct sadb_supported);
1617 }
8ff24541 1618
1da177e4
LT		 1619 enc_len = xfrm_count_enc_supported();
1620 if (enc_len) {
1621 enc_len *= sizeof(struct sadb_alg);
1622 enc_len += sizeof(struct sadb_supported);
1623 }
8ff24541 1624
1da177e4
LT		 1625 len = enc_len + auth_len + sizeof(struct sadb_msg);
1626
1627 skb = alloc_skb(len + 16, allocation);
1628 if (!skb)
1629 goto out_put_algs;
1630
1631 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1632 pfkey_hdr_dup(hdr, orig);
1633 hdr->sadb_msg_errno = 0;
1634 hdr->sadb_msg_len = len / sizeof(uint64_t);
1635
1636 if (auth_len) {
1637 struct sadb_supported *sp;
1638 struct sadb_alg *ap;
1639
1640 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1641 ap = (struct sadb_alg *) (sp + 1);
1642
1643 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1644 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1645
1646 for (i = 0; ; i++) {
1647 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1648 if (!aalg)
1649 break;
1650 if (aalg->available)
1651 *ap++ = aalg->desc;
1652 }
1653 }
1654
1655 if (enc_len) {
1656 struct sadb_supported *sp;
1657 struct sadb_alg *ap;
1658
1659 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1660 ap = (struct sadb_alg *) (sp + 1);
1661
1662 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1663 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1664
1665 for (i = 0; ; i++) {
1666 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1667 if (!ealg)
1668 break;
1669 if (ealg->available)
1670 *ap++ = ealg->desc;
1671 }
1672 }
1673
1674out_put_algs:
1675 return skb;
1676}
1677
1678static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1679{
1680 struct pfkey_sock *pfk = pfkey_sk(sk);
1681 struct sk_buff *supp_skb;
1682
1683 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1684 return -EINVAL;
1685
1686 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1687 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1688 return -EEXIST;
1689 pfk->registered |= (1<<hdr->sadb_msg_satype);
1690 }
1691
1692 xfrm_probe_algs();
8ff24541 1693
1da177e4
LT		 1694 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1695 if (!supp_skb) {
1696 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1697 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1698
1699 return -ENOBUFS;
1700 }
1701
1702 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
1703
1704 return 0;
1705}
1706
26b15dad
JHS		 1707static int key_notify_sa_flush(struct km_event *c)
1708{
1709 struct sk_buff *skb;
1710 struct sadb_msg *hdr;
1711
1712 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1713 if (!skb)
1714 return -ENOBUFS;
1715 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1716 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1717 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad
JHS		 1718 hdr->sadb_msg_seq = c->seq;
1719 hdr->sadb_msg_pid = c->pid;
1720 hdr->sadb_msg_version = PF_KEY_V2;
1721 hdr->sadb_msg_errno = (uint8_t) 0;
1722 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1723
1724 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
1725
1726 return 0;
1727}
1728
1da177e4
LT		 1729static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1730{
1731 unsigned proto;
26b15dad 1732 struct km_event c;
161a09e7 1733 struct xfrm_audit audit_info;
4aa2e62c 1734 int err;
1da177e4
LT		 1735
1736 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1737 if (proto == 0)
1738 return -EINVAL;
1739
0c11b942 1740 audit_info.loginuid = audit_get_loginuid(current);
2532386f 1741 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 1742 audit_info.secid = 0;
0e602451 1743 err = xfrm_state_flush(&init_net, proto, &audit_info);
4aa2e62c
JL		 1744 if (err)
1745 return err;
bf08867f 1746 c.data.proto = proto;
26b15dad
JHS		 1747 c.seq = hdr->sadb_msg_seq;
1748 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1749 c.event = XFRM_MSG_FLUSHSA;
7067802e 1750 c.net = &init_net;
26b15dad 1751 km_state_notify(NULL, &c);
1da177e4
LT		 1752
1753 return 0;
1754}
1755
1da177e4
LT		 1756static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1757{
83321d6b 1758 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 1759 struct sk_buff *out_skb;
1760 struct sadb_msg *out_hdr;
1761
83321d6b
TT		 1762 if (!pfkey_can_dump(&pfk->sk))
1763 return -ENOBUFS;
1764
050f009e 1765 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1766 if (IS_ERR(out_skb))
1767 return PTR_ERR(out_skb);
1768
1769 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 1770 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 1771 out_hdr->sadb_msg_type = SADB_DUMP;
1772 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1773 out_hdr->sadb_msg_errno = 0;
1774 out_hdr->sadb_msg_reserved = 0;
12a169e7 1775 out_hdr->sadb_msg_seq = count + 1;
83321d6b 1776 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
12a169e7
HX		 1777
1778 if (pfk->dump.skb)
1779 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
1780 &pfk->sk);
1781 pfk->dump.skb = out_skb;
1782
1da177e4
LT		 1783 return 0;
1784}
1785
83321d6b
TT		 1786static int pfkey_dump_sa(struct pfkey_sock *pfk)
1787{
284fa7da 1788 return xfrm_state_walk(&init_net, &pfk->dump.u.state, dump_sa, (void *) pfk);
83321d6b
TT		 1789}
1790
1791static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1792{
1793 xfrm_state_walk_done(&pfk->dump.u.state);
1794}
1795
1da177e4
LT		 1796static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1797{
1798 u8 proto;
83321d6b
TT		 1799 struct pfkey_sock *pfk = pfkey_sk(sk);
1800
1801 if (pfk->dump.dump != NULL)
1802 return -EBUSY;
1da177e4
LT		 1803
1804 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1805 if (proto == 0)
1806 return -EINVAL;
1807
83321d6b
TT		 1808 pfk->dump.msg_version = hdr->sadb_msg_version;
1809 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1810 pfk->dump.dump = pfkey_dump_sa;
1811 pfk->dump.done = pfkey_dump_sa_done;
1812 xfrm_state_walk_init(&pfk->dump.u.state, proto);
4c563f76 1813
83321d6b 1814 return pfkey_do_dump(pfk);
1da177e4
LT		 1815}
1816
1817static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1818{
1819 struct pfkey_sock *pfk = pfkey_sk(sk);
1820 int satype = hdr->sadb_msg_satype;
1821
1822 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1823 /* XXX we mangle packet... */
1824 hdr->sadb_msg_errno = 0;
1825 if (satype != 0 && satype != 1)
1826 return -EINVAL;
1827 pfk->promisc = satype;
1828 }
1829 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
1830 return 0;
1831}
1832
1833static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1834{
1835 int i;
1836 u32 reqid = *(u32*)ptr;
1837
1838 for (i=0; i<xp->xfrm_nr; i++) {
1839 if (xp->xfrm_vec[i].reqid == reqid)
1840 return -EEXIST;
1841 }
1842 return 0;
1843}
1844
1845static u32 gen_reqid(void)
1846{
4c563f76 1847 struct xfrm_policy_walk walk;
1da177e4 1848 u32 start;
4c563f76 1849 int rc;
1da177e4
LT		 1850 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1851
1852 start = reqid;
1853 do {
1854 ++reqid;
1855 if (reqid == 0)
1856 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76 1857 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
cdcbca7c 1858 rc = xfrm_policy_walk(&init_net, &walk, check_reqid, (void*)&reqid);
4c563f76
TT		 1859 xfrm_policy_walk_done(&walk);
1860 if (rc != -EEXIST)
1da177e4
LT		 1861 return reqid;
1862 } while (reqid != start);
1863 return 0;
1864}
1865
1866static int
1867parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1868{
1869 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
55569ce2 1870 int mode;
1da177e4
LT		 1871
1872 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1873 return -ELOOP;
1874
1875 if (rq->sadb_x_ipsecrequest_mode == 0)
1876 return -EINVAL;
1877
1878 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1879 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1880 return -EINVAL;
1881 t->mode = mode;
1da177e4
LT		 1882 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1883 t->optional = 1;
1884 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1885 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1886 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1887 t->reqid = 0;
1888 if (!t->reqid && !(t->reqid = gen_reqid()))
1889 return -ENOBUFS;
1890 }
1891
1892 /* addresses present only in tunnel mode */
7e49e6de 1893 if (t->mode == XFRM_MODE_TUNNEL) {
5f95ac91
YH		 1894 u8 *sa = (u8 *) (rq + 1);
1895 int family, socklen;
1896
1897 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1898 &t->saddr);
1899 if (!family)
1da177e4 1900 return -EINVAL;
5f95ac91
YH		 1901
1902 socklen = pfkey_sockaddr_len(family);
1903 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1904 &t->id.daddr) != family)
1905 return -EINVAL;
1906 t->encap_family = family;
2718aa7c
MK		 1907 } else
1908 t->encap_family = xp->family;
1909
1da177e4 1910 /* No way to set this via kame pfkey */
c5d18e98 1911 t->allalgs = 1;
1da177e4
LT		 1912 xp->xfrm_nr++;
1913 return 0;
1914}
1915
1916static int
1917parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1918{
1919 int err;
1920 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1921 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1922
1923 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1924 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1925 return err;
1926 len -= rq->sadb_x_ipsecrequest_len;
1927 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1928 }
1929 return 0;
1930}
1931
df71837d
TJ		 1932static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1933{
1934 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1935
1936 if (xfrm_ctx) {
1937 int len = sizeof(struct sadb_x_sec_ctx);
1938 len += xfrm_ctx->ctx_len;
1939 return PFKEY_ALIGN8(len);
1940 }
1941 return 0;
1942}
1943
1da177e4
LT		 1944static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1945{
2718aa7c 1946 struct xfrm_tmpl *t;
1da177e4 1947 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 1948 int socklen = 0;
1949 int i;
1950
1951 for (i=0; i<xp->xfrm_nr; i++) {
1952 t = xp->xfrm_vec + i;
9e8b4ed8 1953 socklen += pfkey_sockaddr_len(t->encap_family);
2718aa7c 1954 }
1da177e4
LT		 1955
1956 return sizeof(struct sadb_msg) +
1957 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 1958 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 1959 (sockaddr_size * 2) +
1960 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 1961 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1962 (socklen * 2) +
df71837d 1963 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 1964}
1965
1966static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1967{
1968 struct sk_buff *skb;
1969 int size;
1970
1971 size = pfkey_xfrm_policy2msg_size(xp);
1972
1973 skb = alloc_skb(size + 16, GFP_ATOMIC);
1974 if (skb == NULL)
1975 return ERR_PTR(-ENOBUFS);
1976
1977 return skb;
1978}
1979
55569ce2 1980static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1da177e4
LT		 1981{
1982 struct sadb_msg *hdr;
1983 struct sadb_address *addr;
1984 struct sadb_lifetime *lifetime;
1985 struct sadb_x_policy *pol;
df71837d
TJ		 1986 struct sadb_x_sec_ctx *sec_ctx;
1987 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 1988 int i;
1989 int size;
1990 int sockaddr_size = pfkey_sockaddr_size(xp->family);
9e8b4ed8 1991 int socklen = pfkey_sockaddr_len(xp->family);
1da177e4
LT		 1992
1993 size = pfkey_xfrm_policy2msg_size(xp);
1994
1995 /* call should fill header later */
1996 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1997 memset(hdr, 0, size); /* XXX do we need this ? */
1998
1999 /* src address */
8ff24541 2000 addr = (struct sadb_address*) skb_put(skb,
1da177e4 2001 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 2002 addr->sadb_address_len =
1da177e4
LT		 2003 (sizeof(struct sadb_address)+sockaddr_size)/
2004 sizeof(uint64_t);
2005 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2006 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2007 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2008 addr->sadb_address_reserved = 0;
e5b56652
YH		 2009 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2010 xp->selector.sport,
2011 (struct sockaddr *) (addr + 1),
2012 xp->family))
1da177e4
LT		 2013 BUG();
2014
2015 /* dst address */
8ff24541 2016 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 2017 sizeof(struct sadb_address)+sockaddr_size);
2018 addr->sadb_address_len =
2019 (sizeof(struct sadb_address)+sockaddr_size)/
2020 sizeof(uint64_t);
2021 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2022 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2023 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4 2024 addr->sadb_address_reserved = 0;
e5b56652
YH		 2025
2026 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2027 (struct sockaddr *) (addr + 1),
2028 xp->family);
1da177e4
LT		 2029
2030 /* hard time */
8ff24541 2031 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2032 sizeof(struct sadb_lifetime));
2033 lifetime->sadb_lifetime_len =
2034 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2035 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2036 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2037 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2038 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2039 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2040 /* soft time */
8ff24541 2041 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2042 sizeof(struct sadb_lifetime));
2043 lifetime->sadb_lifetime_len =
2044 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2045 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2046 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2047 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2048 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2049 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2050 /* current time */
8ff24541 2051 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2052 sizeof(struct sadb_lifetime));
2053 lifetime->sadb_lifetime_len =
2054 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2055 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2056 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2057 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2058 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2059 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2060
2061 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2062 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2063 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2064 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2065 if (xp->action == XFRM_POLICY_ALLOW) {
2066 if (xp->xfrm_nr)
2067 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2068 else
2069 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2070 }
2071 pol->sadb_x_policy_dir = dir+1;
2072 pol->sadb_x_policy_id = xp->index;
2073 pol->sadb_x_policy_priority = xp->priority;
2074
2075 for (i=0; i<xp->xfrm_nr; i++) {
2076 struct sadb_x_ipsecrequest *rq;
2077 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2078 int req_size;
55569ce2 2079 int mode;
1da177e4
LT		 2080
2081 req_size = sizeof(struct sadb_x_ipsecrequest);
e5b56652
YH		 2082 if (t->mode == XFRM_MODE_TUNNEL) {
2083 socklen = pfkey_sockaddr_len(t->encap_family);
2084 req_size += socklen * 2;
2085 } else {
1da177e4 2086 size -= 2*socklen;
e5b56652 2087 }
1da177e4
LT		 2088 rq = (void*)skb_put(skb, req_size);
2089 pol->sadb_x_policy_len += req_size/8;
2090 memset(rq, 0, sizeof(*rq));
2091 rq->sadb_x_ipsecrequest_len = req_size;
2092 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2093 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2094 return -EINVAL;
fefaa75e 2095 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2096 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2097 if (t->reqid)
2098 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2099 if (t->optional)
2100 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2101 rq->sadb_x_ipsecrequest_reqid = t->reqid;
e5b56652 2102
7e49e6de 2103 if (t->mode == XFRM_MODE_TUNNEL) {
e5b56652
YH		 2104 u8 *sa = (void *)(rq + 1);
2105 pfkey_sockaddr_fill(&t->saddr, 0,
2106 (struct sockaddr *)sa,
2107 t->encap_family);
2108 pfkey_sockaddr_fill(&t->id.daddr, 0,
2109 (struct sockaddr *) (sa + socklen),
2110 t->encap_family);
1da177e4
LT		 2111 }
2112 }
df71837d
TJ		 2113
2114 /* security context */
2115 if ((xfrm_ctx = xp->security)) {
2116 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2117
2118 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2119 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2120 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2121 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2122 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2123 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2124 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2125 xfrm_ctx->ctx_len);
2126 }
2127
1da177e4
LT		 2128 hdr->sadb_msg_len = size / sizeof(uint64_t);
2129 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
55569ce2
KM		 2130
2131 return 0;
1da177e4
LT		 2132}
2133
26b15dad
JHS		 2134static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2135{
2136 struct sk_buff *out_skb;
2137 struct sadb_msg *out_hdr;
2138 int err;
2139
2140 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2141 if (IS_ERR(out_skb)) {
2142 err = PTR_ERR(out_skb);
2143 goto out;
2144 }
55569ce2
KM		 2145 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2146 if (err < 0)
2147 return err;
26b15dad
JHS		 2148
2149 out_hdr = (struct sadb_msg *) out_skb->data;
2150 out_hdr->sadb_msg_version = PF_KEY_V2;
2151
f60f6b8f 2152 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2153 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2154 else
2155 out_hdr->sadb_msg_type = event2poltype(c->event);
2156 out_hdr->sadb_msg_errno = 0;
2157 out_hdr->sadb_msg_seq = c->seq;
2158 out_hdr->sadb_msg_pid = c->pid;
2159 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
2160out:
2161 return 0;
2162
2163}
2164
1da177e4
LT		 2165static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2166{
df71837d 2167 int err = 0;
1da177e4
LT		 2168 struct sadb_lifetime *lifetime;
2169 struct sadb_address *sa;
2170 struct sadb_x_policy *pol;
2171 struct xfrm_policy *xp;
26b15dad 2172 struct km_event c;
df71837d 2173 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2174
2175 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2176 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2177 !ext_hdrs[SADB_X_EXT_POLICY-1])
2178 return -EINVAL;
2179
2180 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2181 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2182 return -EINVAL;
2183 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2184 return -EINVAL;
2185
0331b1f3 2186 xp = xfrm_policy_alloc(&init_net, GFP_KERNEL);
1da177e4
LT		 2187 if (xp == NULL)
2188 return -ENOBUFS;
2189
2190 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2191 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2192 xp->priority = pol->sadb_x_policy_priority;
2193
8ff24541 2194 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2195 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2196 if (!xp->family) {
2197 err = -EINVAL;
2198 goto out;
2199 }
2200 xp->selector.family = xp->family;
2201 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2202 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2203 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2204 if (xp->selector.sport)
8f83f23e 2205 xp->selector.sport_mask = htons(0xffff);
1da177e4 2206
8ff24541 2207 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2208 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2209 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2210
2211 /* Amusing, we set this twice. KAME apps appear to set same value
2212 * in both addresses.
2213 */
2214 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2215
2216 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2217 if (xp->selector.dport)
8f83f23e 2218 xp->selector.dport_mask = htons(0xffff);
1da177e4 2219
df71837d
TJ		 2220 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2221 if (sec_ctx != NULL) {
2222 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2223
2224 if (!uctx) {
2225 err = -ENOBUFS;
2226 goto out;
2227 }
2228
03e1ad7b 2229 err = security_xfrm_policy_alloc(&xp->security, uctx);
df71837d
TJ		 2230 kfree(uctx);
2231
2232 if (err)
2233 goto out;
2234 }
2235
1da177e4
LT		 2236 xp->lft.soft_byte_limit = XFRM_INF;
2237 xp->lft.hard_byte_limit = XFRM_INF;
2238 xp->lft.soft_packet_limit = XFRM_INF;
2239 xp->lft.hard_packet_limit = XFRM_INF;
2240 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2241 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2242 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2243 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2244 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2245 }
2246 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2247 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2248 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2249 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2250 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2251 }
2252 xp->xfrm_nr = 0;
2253 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2254 (err = parse_ipsecrequests(xp, pol)) < 0)
2255 goto out;
2256
1da177e4
LT		 2257 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2258 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2259
ab5f5e8b 2260 xfrm_audit_policy_add(xp, err ? 0 : 1,
2532386f
EP		 2261 audit_get_loginuid(current),
2262 audit_get_sessionid(current), 0);
161a09e7 2263
df71837d
TJ		 2264 if (err)
2265 goto out;
1da177e4 2266
26b15dad 2267 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2268 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2269 else
f60f6b8f 2270 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2271
26b15dad
JHS		 2272 c.seq = hdr->sadb_msg_seq;
2273 c.pid = hdr->sadb_msg_pid;
1da177e4 2274
26b15dad
JHS		 2275 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2276 xfrm_pol_put(xp);
1da177e4
LT		 2277 return 0;
2278
2279out:
12a169e7 2280 xp->walk.dead = 1;
64c31b3f 2281 xfrm_policy_destroy(xp);
1da177e4
LT		 2282 return err;
2283}
2284
2285static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2286{
2287 int err;
2288 struct sadb_address *sa;
2289 struct sadb_x_policy *pol;
03e1ad7b 2290 struct xfrm_policy *xp;
1da177e4 2291 struct xfrm_selector sel;
26b15dad 2292 struct km_event c;
df71837d 2293 struct sadb_x_sec_ctx *sec_ctx;
2db3e47e 2294 struct xfrm_sec_ctx *pol_ctx = NULL;
1da177e4
LT		 2295
2296 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2297 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2298 !ext_hdrs[SADB_X_EXT_POLICY-1])
2299 return -EINVAL;
2300
2301 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2302 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2303 return -EINVAL;
2304
2305 memset(&sel, 0, sizeof(sel));
2306
8ff24541 2307 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2308 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2309 sel.prefixlen_s = sa->sadb_address_prefixlen;
2310 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2311 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2312 if (sel.sport)
8f83f23e 2313 sel.sport_mask = htons(0xffff);
1da177e4 2314
8ff24541 2315 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2316 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2317 sel.prefixlen_d = sa->sadb_address_prefixlen;
2318 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2319 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2320 if (sel.dport)
8f83f23e 2321 sel.dport_mask = htons(0xffff);
1da177e4 2322
df71837d 2323 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
df71837d
TJ		 2324 if (sec_ctx != NULL) {
2325 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2326
2327 if (!uctx)
2328 return -ENOMEM;
2329
03e1ad7b 2330 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
df71837d 2331 kfree(uctx);
df71837d
TJ		 2332 if (err)
2333 return err;
2db3e47e 2334 }
161a09e7 2335
8d1211a6 2336 xp = xfrm_policy_bysel_ctx(&init_net, XFRM_POLICY_TYPE_MAIN,
03e1ad7b
PM		 2337 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2338 1, &err);
2339 security_xfrm_policy_free(pol_ctx);
1da177e4
LT		 2340 if (xp == NULL)
2341 return -ENOENT;
2342
ab5f5e8b 2343 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2344 audit_get_loginuid(current),
2345 audit_get_sessionid(current), 0);
13fcfbb0
DM		 2346
2347 if (err)
c8c05a8e 2348 goto out;
13fcfbb0 2349
26b15dad
JHS		 2350 c.seq = hdr->sadb_msg_seq;
2351 c.pid = hdr->sadb_msg_pid;
1839faab 2352 c.data.byid = 0;
f60f6b8f 2353 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2354 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2355
c8c05a8e 2356out:
26b15dad
JHS		 2357 xfrm_pol_put(xp);
2358 return err;
2359}
2360
2361static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2362{
2363 int err;
2364 struct sk_buff *out_skb;
2365 struct sadb_msg *out_hdr;
2366 err = 0;
2367
1da177e4
LT		 2368 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2369 if (IS_ERR(out_skb)) {
2370 err = PTR_ERR(out_skb);
2371 goto out;
2372 }
55569ce2
KM		 2373 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2374 if (err < 0)
2375 goto out;
1da177e4
LT		 2376
2377 out_hdr = (struct sadb_msg *) out_skb->data;
2378 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2379 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2380 out_hdr->sadb_msg_satype = 0;
2381 out_hdr->sadb_msg_errno = 0;
2382 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2383 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
26b15dad 2384 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
1da177e4
LT		 2385 err = 0;
2386
2387out:
1da177e4
LT		 2388 return err;
2389}
2390
08de61be
SS		 2391#ifdef CONFIG_NET_KEY_MIGRATE
2392static int pfkey_sockaddr_pair_size(sa_family_t family)
2393{
9e8b4ed8 2394 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
08de61be
SS		 2395}
2396
13c1d189 2397static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
08de61be
SS		 2398 xfrm_address_t *saddr, xfrm_address_t *daddr,
2399 u16 *family)
2400{
5f95ac91
YH		 2401 int af, socklen;
2402
13c1d189 2403 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
08de61be
SS		 2404 return -EINVAL;
2405
13c1d189 2406 af = pfkey_sockaddr_extract(sa, saddr);
5f95ac91
YH		 2407 if (!af)
2408 return -EINVAL;
2409
2410 socklen = pfkey_sockaddr_len(af);
13c1d189 2411 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
5f95ac91 2412 daddr) != af)
08de61be 2413 return -EINVAL;
08de61be 2414
5f95ac91 2415 *family = af;
08de61be
SS		 2416 return 0;
2417}
2418
2419static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2420 struct xfrm_migrate *m)
2421{
2422 int err;
2423 struct sadb_x_ipsecrequest *rq2;
55569ce2 2424 int mode;
08de61be
SS		 2425
2426 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2427 len < rq1->sadb_x_ipsecrequest_len)
2428 return -EINVAL;
2429
2430 /* old endoints */
13c1d189
AE		 2431 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2432 rq1->sadb_x_ipsecrequest_len,
2433 &m->old_saddr, &m->old_daddr,
08de61be
SS		 2434 &m->old_family);
2435 if (err)
2436 return err;
2437
2438 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2439 len -= rq1->sadb_x_ipsecrequest_len;
2440
2441 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2442 len < rq2->sadb_x_ipsecrequest_len)
2443 return -EINVAL;
2444
2445 /* new endpoints */
13c1d189
AE		 2446 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2447 rq2->sadb_x_ipsecrequest_len,
2448 &m->new_saddr, &m->new_daddr,
08de61be
SS		 2449 &m->new_family);
2450 if (err)
2451 return err;
2452
2453 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2454 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2455 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2456 return -EINVAL;
2457
2458 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2459 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2460 return -EINVAL;
2461 m->mode = mode;
08de61be
SS		 2462 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2463
2464 return ((int)(rq1->sadb_x_ipsecrequest_len +
2465 rq2->sadb_x_ipsecrequest_len));
2466}
2467
2468static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2469 struct sadb_msg *hdr, void **ext_hdrs)
2470{
2471 int i, len, ret, err = -EINVAL;
2472 u8 dir;
2473 struct sadb_address *sa;
13c1d189 2474 struct sadb_x_kmaddress *kma;
08de61be
SS		 2475 struct sadb_x_policy *pol;
2476 struct sadb_x_ipsecrequest *rq;
2477 struct xfrm_selector sel;
2478 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2479 struct xfrm_kmaddress k;
08de61be
SS		 2480
2481 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
13c1d189 2482 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
08de61be
SS		 2483 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2484 err = -EINVAL;
2485 goto out;
2486 }
2487
13c1d189 2488 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
08de61be 2489 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
08de61be
SS		 2490
2491 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2492 err = -EINVAL;
2493 goto out;
2494 }
2495
13c1d189
AE		 2496 if (kma) {
2497 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2498 k.reserved = kma->sadb_x_kmaddress_reserved;
2499 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2500 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2501 &k.local, &k.remote, &k.family);
2502 if (ret < 0) {
2503 err = ret;
2504 goto out;
2505 }
2506 }
2507
08de61be
SS		 2508 dir = pol->sadb_x_policy_dir - 1;
2509 memset(&sel, 0, sizeof(sel));
2510
2511 /* set source address info of selector */
2512 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2513 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2514 sel.prefixlen_s = sa->sadb_address_prefixlen;
2515 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2516 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2517 if (sel.sport)
582ee43d 2518 sel.sport_mask = htons(0xffff);
08de61be
SS		 2519
2520 /* set destination address info of selector */
2521 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2522 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2523 sel.prefixlen_d = sa->sadb_address_prefixlen;
2524 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2525 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2526 if (sel.dport)
582ee43d 2527 sel.dport_mask = htons(0xffff);
08de61be
SS		 2528
2529 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2530
2531 /* extract ipsecrequests */
2532 i = 0;
2533 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2534
2535 while (len > 0 && i < XFRM_MAX_DEPTH) {
2536 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2537 if (ret < 0) {
2538 err = ret;
2539 goto out;
2540 } else {
2541 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2542 len -= ret;
2543 i++;
2544 }
2545 }
2546
2547 if (!i || len > 0) {
2548 err = -EINVAL;
2549 goto out;
2550 }
2551
13c1d189
AE		 2552 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2553 kma ? &k : NULL);
08de61be
SS		 2554
2555 out:
2556 return err;
2557}
2558#else
2559static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2560 struct sadb_msg *hdr, void **ext_hdrs)
2561{
2562 return -ENOPROTOOPT;
2563}
2564#endif
2565
2566
1da177e4
LT		 2567static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2568{
77d8d7a6 2569 unsigned int dir;
215a2dd3 2570 int err = 0, delete;
1da177e4
LT		 2571 struct sadb_x_policy *pol;
2572 struct xfrm_policy *xp;
26b15dad 2573 struct km_event c;
1da177e4
LT		 2574
2575 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2576 return -EINVAL;
2577
77d8d7a6
HX		 2578 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2579 if (dir >= XFRM_POLICY_MAX)
2580 return -EINVAL;
2581
215a2dd3 2582 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
8d1211a6
AD		 2583 xp = xfrm_policy_byid(&init_net, XFRM_POLICY_TYPE_MAIN, dir,
2584 pol->sadb_x_policy_id, delete, &err);
1da177e4
LT		 2585 if (xp == NULL)
2586 return -ENOENT;
2587
215a2dd3 2588 if (delete) {
ab5f5e8b 2589 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2590 audit_get_loginuid(current),
2591 audit_get_sessionid(current), 0);
1da177e4 2592
215a2dd3
EP		 2593 if (err)
2594 goto out;
2595 c.seq = hdr->sadb_msg_seq;
2596 c.pid = hdr->sadb_msg_pid;
bf08867f 2597 c.data.byid = 1;
f60f6b8f 2598 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2599 km_policy_notify(xp, dir, &c);
26b15dad 2600 } else {
77d8d7a6 2601 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2602 }
1da177e4 2603
215a2dd3 2604out:
1da177e4
LT		 2605 xfrm_pol_put(xp);
2606 return err;
2607}
2608
2609static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2610{
83321d6b 2611 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 2612 struct sk_buff *out_skb;
2613 struct sadb_msg *out_hdr;
55569ce2 2614 int err;
1da177e4 2615
83321d6b
TT		 2616 if (!pfkey_can_dump(&pfk->sk))
2617 return -ENOBUFS;
2618
1da177e4
LT		 2619 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2620 if (IS_ERR(out_skb))
2621 return PTR_ERR(out_skb);
2622
55569ce2
KM		 2623 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2624 if (err < 0)
2625 return err;
1da177e4
LT		 2626
2627 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 2628 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 2629 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2630 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2631 out_hdr->sadb_msg_errno = 0;
12a169e7 2632 out_hdr->sadb_msg_seq = count + 1;
83321d6b 2633 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
12a169e7
HX		 2634
2635 if (pfk->dump.skb)
2636 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
2637 &pfk->sk);
2638 pfk->dump.skb = out_skb;
2639
1da177e4
LT		 2640 return 0;
2641}
2642
83321d6b
TT		 2643static int pfkey_dump_sp(struct pfkey_sock *pfk)
2644{
cdcbca7c 2645 return xfrm_policy_walk(&init_net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
83321d6b
TT		 2646}
2647
2648static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2649{
2650 xfrm_policy_walk_done(&pfk->dump.u.policy);
2651}
2652
1da177e4
LT		 2653static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2654{
83321d6b 2655 struct pfkey_sock *pfk = pfkey_sk(sk);
4c563f76 2656
83321d6b
TT		 2657 if (pfk->dump.dump != NULL)
2658 return -EBUSY;
1da177e4 2659
83321d6b
TT		 2660 pfk->dump.msg_version = hdr->sadb_msg_version;
2661 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2662 pfk->dump.dump = pfkey_dump_sp;
2663 pfk->dump.done = pfkey_dump_sp_done;
2664 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2665
2666 return pfkey_do_dump(pfk);
1da177e4
LT		 2667}
2668
26b15dad 2669static int key_notify_policy_flush(struct km_event *c)
1da177e4
LT		 2670{
2671 struct sk_buff *skb_out;
26b15dad 2672 struct sadb_msg *hdr;
1da177e4 2673
26b15dad 2674 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2675 if (!skb_out)
2676 return -ENOBUFS;
26b15dad 2677 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2678 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad
JHS		 2679 hdr->sadb_msg_seq = c->seq;
2680 hdr->sadb_msg_pid = c->pid;
2681 hdr->sadb_msg_version = PF_KEY_V2;
2682 hdr->sadb_msg_errno = (uint8_t) 0;
2683 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
2684 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
2685 return 0;
1da177e4 2686
26b15dad
JHS		 2687}
2688
2689static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2690{
2691 struct km_event c;
161a09e7 2692 struct xfrm_audit audit_info;
4aa2e62c 2693 int err;
1da177e4 2694
0c11b942 2695 audit_info.loginuid = audit_get_loginuid(current);
2532386f 2696 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 2697 audit_info.secid = 0;
33ffbbd5 2698 err = xfrm_policy_flush(&init_net, XFRM_POLICY_TYPE_MAIN, &audit_info);
4aa2e62c
JL		 2699 if (err)
2700 return err;
f7b6983f 2701 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2702 c.event = XFRM_MSG_FLUSHPOLICY;
26b15dad
JHS		 2703 c.pid = hdr->sadb_msg_pid;
2704 c.seq = hdr->sadb_msg_seq;
7067802e 2705 c.net = &init_net;
26b15dad 2706 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2707
2708 return 0;
2709}
2710
2711typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2712 struct sadb_msg *hdr, void **ext_hdrs);
2713static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2714 [SADB_RESERVED] = pfkey_reserved,
2715 [SADB_GETSPI] = pfkey_getspi,
2716 [SADB_UPDATE] = pfkey_add,
2717 [SADB_ADD] = pfkey_add,
2718 [SADB_DELETE] = pfkey_delete,
2719 [SADB_GET] = pfkey_get,
2720 [SADB_ACQUIRE] = pfkey_acquire,
2721 [SADB_REGISTER] = pfkey_register,
2722 [SADB_EXPIRE] = NULL,
2723 [SADB_FLUSH] = pfkey_flush,
2724 [SADB_DUMP] = pfkey_dump,
2725 [SADB_X_PROMISC] = pfkey_promisc,
2726 [SADB_X_PCHANGE] = NULL,
2727 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2728 [SADB_X_SPDADD] = pfkey_spdadd,
2729 [SADB_X_SPDDELETE] = pfkey_spddelete,
2730 [SADB_X_SPDGET] = pfkey_spdget,
2731 [SADB_X_SPDACQUIRE] = NULL,
2732 [SADB_X_SPDDUMP] = pfkey_spddump,
2733 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2734 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2735 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2736 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2737};
2738
2739static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2740{
2741 void *ext_hdrs[SADB_EXT_MAX];
2742 int err;
2743
2744 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2745 BROADCAST_PROMISC_ONLY, NULL);
2746
2747 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2748 err = parse_exthdrs(skb, hdr, ext_hdrs);
2749 if (!err) {
2750 err = -EOPNOTSUPP;
2751 if (pfkey_funcs[hdr->sadb_msg_type])
2752 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2753 }
2754 return err;
2755}
2756
2757static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2758{
2759 struct sadb_msg *hdr = NULL;
2760
2761 if (skb->len < sizeof(*hdr)) {
2762 *errp = -EMSGSIZE;
2763 } else {
2764 hdr = (struct sadb_msg *) skb->data;
2765 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2766 hdr->sadb_msg_reserved != 0 ||
2767 (hdr->sadb_msg_type <= SADB_RESERVED ||
2768 hdr->sadb_msg_type > SADB_MAX)) {
2769 hdr = NULL;
2770 *errp = -EINVAL;
2771 } else if (hdr->sadb_msg_len != (skb->len /
2772 sizeof(uint64_t)) ||
2773 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2774 sizeof(uint64_t))) {
2775 hdr = NULL;
2776 *errp = -EMSGSIZE;
2777 } else {
2778 *errp = 0;
2779 }
2780 }
2781 return hdr;
2782}
2783
2784static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2785{
f398035f
HX		 2786 unsigned int id = d->desc.sadb_alg_id;
2787
2788 if (id >= sizeof(t->aalgos) * 8)
2789 return 0;
2790
2791 return (t->aalgos >> id) & 1;
1da177e4
LT		 2792}
2793
2794static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2795{
f398035f
HX		 2796 unsigned int id = d->desc.sadb_alg_id;
2797
2798 if (id >= sizeof(t->ealgos) * 8)
2799 return 0;
2800
2801 return (t->ealgos >> id) & 1;
1da177e4
LT		 2802}
2803
2804static int count_ah_combs(struct xfrm_tmpl *t)
2805{
2806 int i, sz = 0;
2807
2808 for (i = 0; ; i++) {
2809 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2810 if (!aalg)
2811 break;
2812 if (aalg_tmpl_set(t, aalg) && aalg->available)
2813 sz += sizeof(struct sadb_comb);
2814 }
2815 return sz + sizeof(struct sadb_prop);
2816}
2817
2818static int count_esp_combs(struct xfrm_tmpl *t)
2819{
2820 int i, k, sz = 0;
2821
2822 for (i = 0; ; i++) {
2823 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2824 if (!ealg)
2825 break;
8ff24541 2826
1da177e4
LT		 2827 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2828 continue;
8ff24541 2829
1da177e4
LT		 2830 for (k = 1; ; k++) {
2831 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2832 if (!aalg)
2833 break;
8ff24541 2834
1da177e4
LT		 2835 if (aalg_tmpl_set(t, aalg) && aalg->available)
2836 sz += sizeof(struct sadb_comb);
2837 }
2838 }
2839 return sz + sizeof(struct sadb_prop);
2840}
2841
2842static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2843{
2844 struct sadb_prop *p;
2845 int i;
2846
2847 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2848 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2849 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2850 p->sadb_prop_replay = 32;
2851 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2852
2853 for (i = 0; ; i++) {
2854 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2855 if (!aalg)
2856 break;
2857
2858 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2859 struct sadb_comb *c;
2860 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2861 memset(c, 0, sizeof(*c));
2862 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2863 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2864 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2865 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2866 c->sadb_comb_hard_addtime = 24*60*60;
2867 c->sadb_comb_soft_addtime = 20*60*60;
2868 c->sadb_comb_hard_usetime = 8*60*60;
2869 c->sadb_comb_soft_usetime = 7*60*60;
2870 }
2871 }
2872}
2873
2874static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2875{
2876 struct sadb_prop *p;
2877 int i, k;
2878
2879 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2880 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2881 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2882 p->sadb_prop_replay = 32;
2883 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2884
2885 for (i=0; ; i++) {
2886 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2887 if (!ealg)
2888 break;
8ff24541 2889
1da177e4
LT		 2890 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2891 continue;
8ff24541 2892
1da177e4
LT		 2893 for (k = 1; ; k++) {
2894 struct sadb_comb *c;
2895 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2896 if (!aalg)
2897 break;
2898 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2899 continue;
2900 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2901 memset(c, 0, sizeof(*c));
2902 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2903 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2904 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2905 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2906 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2907 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2908 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2909 c->sadb_comb_hard_addtime = 24*60*60;
2910 c->sadb_comb_soft_addtime = 20*60*60;
2911 c->sadb_comb_hard_usetime = 8*60*60;
2912 c->sadb_comb_soft_usetime = 7*60*60;
2913 }
2914 }
2915}
2916
26b15dad
JHS		 2917static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2918{
2919 return 0;
2920}
2921
2922static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2923{
2924 struct sk_buff *out_skb;
2925 struct sadb_msg *out_hdr;
26b15dad
JHS		 2926 int hard;
2927 int hsc;
2928
bf08867f 2929 hard = c->data.hard;
26b15dad
JHS		 2930 if (hard)
2931 hsc = 2;
2932 else
2933 hsc = 1;
1da177e4 2934
050f009e 2935 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 2936 if (IS_ERR(out_skb))
2937 return PTR_ERR(out_skb);
2938
2939 out_hdr = (struct sadb_msg *) out_skb->data;
2940 out_hdr->sadb_msg_version = PF_KEY_V2;
2941 out_hdr->sadb_msg_type = SADB_EXPIRE;
2942 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2943 out_hdr->sadb_msg_errno = 0;
2944 out_hdr->sadb_msg_reserved = 0;
2945 out_hdr->sadb_msg_seq = 0;
2946 out_hdr->sadb_msg_pid = 0;
2947
2948 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
2949 return 0;
2950}
2951
26b15dad
JHS		 2952static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2953{
3fa87a32
AD		 2954 struct net *net = &init_net;
2955 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
2956
2957 if (atomic_read(&net_pfkey->socks_nr) == 0)
99c6f60e
JHS		 2958 return 0;
2959
26b15dad 2960 switch (c->event) {
f60f6b8f 2961 case XFRM_MSG_EXPIRE:
26b15dad 2962 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 2963 case XFRM_MSG_DELSA:
2964 case XFRM_MSG_NEWSA:
2965 case XFRM_MSG_UPDSA:
26b15dad 2966 return key_notify_sa(x, c);
f60f6b8f 2967 case XFRM_MSG_FLUSHSA:
26b15dad 2968 return key_notify_sa_flush(c);
d51d081d
JHS		 2969 case XFRM_MSG_NEWAE: /* not yet supported */
2970 break;
26b15dad
JHS		 2971 default:
2972 printk("pfkey: Unknown SA event %d\n", c->event);
2973 break;
2974 }
2975
2976 return 0;
2977}
2978
2979static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2980{
f7b6983f
MN		 2981 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2982 return 0;
2983
26b15dad 2984 switch (c->event) {
f60f6b8f 2985 case XFRM_MSG_POLEXPIRE:
26b15dad 2986 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 2987 case XFRM_MSG_DELPOLICY:
2988 case XFRM_MSG_NEWPOLICY:
2989 case XFRM_MSG_UPDPOLICY:
26b15dad 2990 return key_notify_policy(xp, dir, c);
f60f6b8f 2991 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 2992 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2993 break;
26b15dad
JHS		 2994 return key_notify_policy_flush(c);
2995 default:
2996 printk("pfkey: Unknown policy event %d\n", c->event);
2997 break;
2998 }
2999
3000 return 0;
3001}
3002
1da177e4
LT		 3003static u32 get_acqseq(void)
3004{
3005 u32 res;
3006 static u32 acqseq;
3007 static DEFINE_SPINLOCK(acqseq_lock);
3008
3009 spin_lock_bh(&acqseq_lock);
3010 res = (++acqseq ? : ++acqseq);
3011 spin_unlock_bh(&acqseq_lock);
3012 return res;
3013}
3014
3015static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3016{
3017 struct sk_buff *skb;
3018 struct sadb_msg *hdr;
3019 struct sadb_address *addr;
3020 struct sadb_x_policy *pol;
1da177e4
LT		 3021 int sockaddr_size;
3022 int size;
4e2ba18e
VY		 3023 struct sadb_x_sec_ctx *sec_ctx;
3024 struct xfrm_sec_ctx *xfrm_ctx;
3025 int ctx_size = 0;
8ff24541 3026
1da177e4
LT		 3027 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3028 if (!sockaddr_size)
3029 return -EINVAL;
3030
3031 size = sizeof(struct sadb_msg) +
3032 (sizeof(struct sadb_address) * 2) +
3033 (sockaddr_size * 2) +
3034 sizeof(struct sadb_x_policy);
8ff24541 3035
1da177e4
LT		 3036 if (x->id.proto == IPPROTO_AH)
3037 size += count_ah_combs(t);
3038 else if (x->id.proto == IPPROTO_ESP)
3039 size += count_esp_combs(t);
3040
4e2ba18e
VY		 3041 if ((xfrm_ctx = x->security)) {
3042 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3043 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3044 }
3045
1da177e4
LT		 3046 skb = alloc_skb(size + 16, GFP_ATOMIC);
3047 if (skb == NULL)
3048 return -ENOMEM;
8ff24541 3049
1da177e4
LT		 3050 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3051 hdr->sadb_msg_version = PF_KEY_V2;
3052 hdr->sadb_msg_type = SADB_ACQUIRE;
3053 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3054 hdr->sadb_msg_len = size / sizeof(uint64_t);
3055 hdr->sadb_msg_errno = 0;
3056 hdr->sadb_msg_reserved = 0;
3057 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3058 hdr->sadb_msg_pid = 0;
3059
3060 /* src address */
8ff24541 3061 addr = (struct sadb_address*) skb_put(skb,
1da177e4 3062 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3063 addr->sadb_address_len =
1da177e4
LT		 3064 (sizeof(struct sadb_address)+sockaddr_size)/
3065 sizeof(uint64_t);
3066 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3067 addr->sadb_address_proto = 0;
3068 addr->sadb_address_reserved = 0;
e5b56652
YH		 3069 addr->sadb_address_prefixlen =
3070 pfkey_sockaddr_fill(&x->props.saddr, 0,
3071 (struct sockaddr *) (addr + 1),
3072 x->props.family);
3073 if (!addr->sadb_address_prefixlen)
1da177e4 3074 BUG();
8ff24541 3075
1da177e4 3076 /* dst address */
8ff24541 3077 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 3078 sizeof(struct sadb_address)+sockaddr_size);
3079 addr->sadb_address_len =
3080 (sizeof(struct sadb_address)+sockaddr_size)/
3081 sizeof(uint64_t);
3082 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3083 addr->sadb_address_proto = 0;
3084 addr->sadb_address_reserved = 0;
e5b56652
YH		 3085 addr->sadb_address_prefixlen =
3086 pfkey_sockaddr_fill(&x->id.daddr, 0,
3087 (struct sockaddr *) (addr + 1),
3088 x->props.family);
3089 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3090 BUG();
3091
3092 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3093 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3094 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3095 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3096 pol->sadb_x_policy_dir = dir+1;
3097 pol->sadb_x_policy_id = xp->index;
3098
3099 /* Set sadb_comb's. */
3100 if (x->id.proto == IPPROTO_AH)
3101 dump_ah_combs(skb, t);
3102 else if (x->id.proto == IPPROTO_ESP)
3103 dump_esp_combs(skb, t);
3104
4e2ba18e
VY		 3105 /* security context */
3106 if (xfrm_ctx) {
3107 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3108 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3109 sec_ctx->sadb_x_sec_len =
3110 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3111 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3112 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3113 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3114 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3115 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3116 xfrm_ctx->ctx_len);
3117 }
3118
1da177e4
LT		 3119 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3120}
3121
cb969f07 3122static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3123 u8 *data, int len, int *dir)
1da177e4
LT		 3124{
3125 struct xfrm_policy *xp;
3126 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3127 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3128
cb969f07 3129 switch (sk->sk_family) {
1da177e4
LT		 3130 case AF_INET:
3131 if (opt != IP_IPSEC_POLICY) {
3132 *dir = -EOPNOTSUPP;
3133 return NULL;
3134 }
3135 break;
3136#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3137 case AF_INET6:
3138 if (opt != IPV6_IPSEC_POLICY) {
3139 *dir = -EOPNOTSUPP;
3140 return NULL;
3141 }
3142 break;
3143#endif
3144 default:
3145 *dir = -EINVAL;
3146 return NULL;
3147 }
3148
3149 *dir = -EINVAL;
3150
3151 if (len < sizeof(struct sadb_x_policy) ||
3152 pol->sadb_x_policy_len*8 > len ||
3153 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3154 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3155 return NULL;
3156
0331b1f3 3157 xp = xfrm_policy_alloc(&init_net, GFP_ATOMIC);
1da177e4
LT		 3158 if (xp == NULL) {
3159 *dir = -ENOBUFS;
3160 return NULL;
3161 }
3162
3163 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3164 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3165
3166 xp->lft.soft_byte_limit = XFRM_INF;
3167 xp->lft.hard_byte_limit = XFRM_INF;
3168 xp->lft.soft_packet_limit = XFRM_INF;
3169 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3170 xp->family = sk->sk_family;
1da177e4
LT		 3171
3172 xp->xfrm_nr = 0;
3173 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3174 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3175 goto out;
3176
df71837d
TJ		 3177 /* security context too */
3178 if (len >= (pol->sadb_x_policy_len*8 +
3179 sizeof(struct sadb_x_sec_ctx))) {
3180 char *p = (char *)pol;
3181 struct xfrm_user_sec_ctx *uctx;
3182
3183 p += pol->sadb_x_policy_len*8;
3184 sec_ctx = (struct sadb_x_sec_ctx *)p;
3185 if (len < pol->sadb_x_policy_len*8 +
cb969f07
VY		 3186 sec_ctx->sadb_x_sec_len) {
3187 *dir = -EINVAL;
df71837d 3188 goto out;
cb969f07 3189 }
df71837d
TJ		 3190 if ((*dir = verify_sec_ctx_len(p)))
3191 goto out;
3192 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
03e1ad7b 3193 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
df71837d
TJ		 3194 kfree(uctx);
3195
3196 if (*dir)
3197 goto out;
3198 }
3199
1da177e4
LT		 3200 *dir = pol->sadb_x_policy_dir-1;
3201 return xp;
3202
3203out:
70e90679 3204 xp->walk.dead = 1;
64c31b3f 3205 xfrm_policy_destroy(xp);
1da177e4
LT		 3206 return NULL;
3207}
3208
5d36b180 3209static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3210{
3211 struct sk_buff *skb;
3212 struct sadb_msg *hdr;
3213 struct sadb_sa *sa;
3214 struct sadb_address *addr;
3215 struct sadb_x_nat_t_port *n_port;
1da177e4
LT		 3216 int sockaddr_size;
3217 int size;
3218 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3219 struct xfrm_encap_tmpl *natt = NULL;
3220
3221 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3222 if (!sockaddr_size)
3223 return -EINVAL;
3224
3225 if (!satype)
3226 return -EINVAL;
3227
3228 if (!x->encap)
3229 return -EINVAL;
3230
3231 natt = x->encap;
3232
3233 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3234 *
3235 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3236 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3237 */
8ff24541 3238
1da177e4
LT		 3239 size = sizeof(struct sadb_msg) +
3240 sizeof(struct sadb_sa) +
3241 (sizeof(struct sadb_address) * 2) +
3242 (sockaddr_size * 2) +
3243 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3244
1da177e4
LT		 3245 skb = alloc_skb(size + 16, GFP_ATOMIC);
3246 if (skb == NULL)
3247 return -ENOMEM;
8ff24541 3248
1da177e4
LT		 3249 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3250 hdr->sadb_msg_version = PF_KEY_V2;
3251 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3252 hdr->sadb_msg_satype = satype;
3253 hdr->sadb_msg_len = size / sizeof(uint64_t);
3254 hdr->sadb_msg_errno = 0;
3255 hdr->sadb_msg_reserved = 0;
3256 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3257 hdr->sadb_msg_pid = 0;
3258
3259 /* SA */
3260 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3261 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3262 sa->sadb_sa_exttype = SADB_EXT_SA;
3263 sa->sadb_sa_spi = x->id.spi;
3264 sa->sadb_sa_replay = 0;
3265 sa->sadb_sa_state = 0;
3266 sa->sadb_sa_auth = 0;
3267 sa->sadb_sa_encrypt = 0;
3268 sa->sadb_sa_flags = 0;
3269
3270 /* ADDRESS_SRC (old addr) */
3271 addr = (struct sadb_address*)
3272 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3273 addr->sadb_address_len =
1da177e4
LT		 3274 (sizeof(struct sadb_address)+sockaddr_size)/
3275 sizeof(uint64_t);
3276 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3277 addr->sadb_address_proto = 0;
3278 addr->sadb_address_reserved = 0;
e5b56652
YH		 3279 addr->sadb_address_prefixlen =
3280 pfkey_sockaddr_fill(&x->props.saddr, 0,
3281 (struct sockaddr *) (addr + 1),
3282 x->props.family);
3283 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3284 BUG();
3285
3286 /* NAT_T_SPORT (old port) */
3287 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3288 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3289 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3290 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3291 n_port->sadb_x_nat_t_port_reserved = 0;
3292
3293 /* ADDRESS_DST (new addr) */
3294 addr = (struct sadb_address*)
3295 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3296 addr->sadb_address_len =
1da177e4
LT		 3297 (sizeof(struct sadb_address)+sockaddr_size)/
3298 sizeof(uint64_t);
3299 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3300 addr->sadb_address_proto = 0;
3301 addr->sadb_address_reserved = 0;
e5b56652
YH		 3302 addr->sadb_address_prefixlen =
3303 pfkey_sockaddr_fill(ipaddr, 0,
3304 (struct sockaddr *) (addr + 1),
3305 x->props.family);
3306 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3307 BUG();
3308
3309 /* NAT_T_DPORT (new port) */
3310 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3311 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3312 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3313 n_port->sadb_x_nat_t_port_port = sport;
3314 n_port->sadb_x_nat_t_port_reserved = 0;
3315
3316 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
3317}
3318
08de61be
SS		 3319#ifdef CONFIG_NET_KEY_MIGRATE
3320static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3321 struct xfrm_selector *sel)
3322{
3323 struct sadb_address *addr;
08de61be
SS		 3324 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3325 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3326 addr->sadb_address_exttype = type;
3327 addr->sadb_address_proto = sel->proto;
3328 addr->sadb_address_reserved = 0;
3329
3330 switch (type) {
3331 case SADB_EXT_ADDRESS_SRC:
e5b56652
YH		 3332 addr->sadb_address_prefixlen = sel->prefixlen_s;
3333 pfkey_sockaddr_fill(&sel->saddr, 0,
3334 (struct sockaddr *)(addr + 1),
3335 sel->family);
08de61be
SS		 3336 break;
3337 case SADB_EXT_ADDRESS_DST:
e5b56652
YH		 3338 addr->sadb_address_prefixlen = sel->prefixlen_d;
3339 pfkey_sockaddr_fill(&sel->daddr, 0,
3340 (struct sockaddr *)(addr + 1),
3341 sel->family);
08de61be
SS		 3342 break;
3343 default:
3344 return -EINVAL;
3345 }
3346
3347 return 0;
3348}
3349
13c1d189
AE		 3350
3351static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k)
3352{
3353 struct sadb_x_kmaddress *kma;
3354 u8 *sa;
3355 int family = k->family;
3356 int socklen = pfkey_sockaddr_len(family);
3357 int size_req;
3358
3359 size_req = (sizeof(struct sadb_x_kmaddress) +
3360 pfkey_sockaddr_pair_size(family));
3361
3362 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3363 memset(kma, 0, size_req);
3364 kma->sadb_x_kmaddress_len = size_req / 8;
3365 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3366 kma->sadb_x_kmaddress_reserved = k->reserved;
3367
3368 sa = (u8 *)(kma + 1);
3369 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3370 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3371 return -EINVAL;
3372
3373 return 0;
3374}
3375
08de61be
SS		 3376static int set_ipsecrequest(struct sk_buff *skb,
3377 uint8_t proto, uint8_t mode, int level,
3378 uint32_t reqid, uint8_t family,
3379 xfrm_address_t *src, xfrm_address_t *dst)
3380{
3381 struct sadb_x_ipsecrequest *rq;
e5b56652
YH		 3382 u8 *sa;
3383 int socklen = pfkey_sockaddr_len(family);
08de61be
SS		 3384 int size_req;
3385
3386 size_req = sizeof(struct sadb_x_ipsecrequest) +
3387 pfkey_sockaddr_pair_size(family);
3388
3389 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3390 memset(rq, 0, size_req);
3391 rq->sadb_x_ipsecrequest_len = size_req;
3392 rq->sadb_x_ipsecrequest_proto = proto;
3393 rq->sadb_x_ipsecrequest_mode = mode;
3394 rq->sadb_x_ipsecrequest_level = level;
3395 rq->sadb_x_ipsecrequest_reqid = reqid;
3396
e5b56652
YH		 3397 sa = (u8 *) (rq + 1);
3398 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3399 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
08de61be 3400 return -EINVAL;
08de61be
SS		 3401
3402 return 0;
3403}
3404#endif
3405
3406#ifdef CONFIG_NET_KEY_MIGRATE
3407static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 3408 struct xfrm_migrate *m, int num_bundles,
3409 struct xfrm_kmaddress *k)
08de61be
SS		 3410{
3411 int i;
3412 int sasize_sel;
3413 int size = 0;
3414 int size_pol = 0;
3415 struct sk_buff *skb;
3416 struct sadb_msg *hdr;
3417 struct sadb_x_policy *pol;
3418 struct xfrm_migrate *mp;
3419
3420 if (type != XFRM_POLICY_TYPE_MAIN)
3421 return 0;
3422
3423 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3424 return -EINVAL;
3425
13c1d189
AE		 3426 if (k != NULL) {
3427 /* addresses for KM */
3428 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3429 pfkey_sockaddr_pair_size(k->family));
3430 }
3431
08de61be
SS		 3432 /* selector */
3433 sasize_sel = pfkey_sockaddr_size(sel->family);
3434 if (!sasize_sel)
3435 return -EINVAL;
3436 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3437
3438 /* policy info */
3439 size_pol += sizeof(struct sadb_x_policy);
3440
3441 /* ipsecrequests */
3442 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3443 /* old locator pair */
3444 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3445 pfkey_sockaddr_pair_size(mp->old_family);
3446 /* new locator pair */
3447 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3448 pfkey_sockaddr_pair_size(mp->new_family);
3449 }
3450
3451 size += sizeof(struct sadb_msg) + size_pol;
3452
3453 /* alloc buffer */
3454 skb = alloc_skb(size, GFP_ATOMIC);
3455 if (skb == NULL)
3456 return -ENOMEM;
3457
3458 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3459 hdr->sadb_msg_version = PF_KEY_V2;
3460 hdr->sadb_msg_type = SADB_X_MIGRATE;
3461 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3462 hdr->sadb_msg_len = size / 8;
3463 hdr->sadb_msg_errno = 0;
3464 hdr->sadb_msg_reserved = 0;
3465 hdr->sadb_msg_seq = 0;
3466 hdr->sadb_msg_pid = 0;
3467
13c1d189
AE		 3468 /* Addresses to be used by KM for negotiation, if ext is available */
3469 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3470 return -EINVAL;
3471
08de61be
SS		 3472 /* selector src */
3473 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3474
3475 /* selector dst */
3476 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3477
3478 /* policy information */
3479 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3480 pol->sadb_x_policy_len = size_pol / 8;
3481 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3482 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3483 pol->sadb_x_policy_dir = dir + 1;
3484 pol->sadb_x_policy_id = 0;
3485 pol->sadb_x_policy_priority = 0;
3486
3487 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3488 /* old ipsecrequest */
55569ce2
KM		 3489 int mode = pfkey_mode_from_xfrm(mp->mode);
3490 if (mode < 0)
d4782c32 3491 goto err;
55569ce2 3492 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3493 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3494 mp->reqid, mp->old_family,
d4782c32
PM		 3495 &mp->old_saddr, &mp->old_daddr) < 0)
3496 goto err;
08de61be
SS		 3497
3498 /* new ipsecrequest */
55569ce2 3499 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3500 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3501 mp->reqid, mp->new_family,
d4782c32
PM		 3502 &mp->new_saddr, &mp->new_daddr) < 0)
3503 goto err;
08de61be
SS		 3504 }
3505
3506 /* broadcast migrate message to sockets */
3507 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
3508
3509 return 0;
d4782c32
PM		 3510
3511err:
3512 kfree_skb(skb);
3513 return -EINVAL;
08de61be
SS		 3514}
3515#else
3516static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 3517 struct xfrm_migrate *m, int num_bundles,
3518 struct xfrm_kmaddress *k)
08de61be
SS		 3519{
3520 return -ENOPROTOOPT;
3521}
3522#endif
3523
1da177e4
LT		 3524static int pfkey_sendmsg(struct kiocb *kiocb,
3525 struct socket *sock, struct msghdr *msg, size_t len)
3526{
3527 struct sock *sk = sock->sk;
3528 struct sk_buff *skb = NULL;
3529 struct sadb_msg *hdr = NULL;
3530 int err;
3531
3532 err = -EOPNOTSUPP;
3533 if (msg->msg_flags & MSG_OOB)
3534 goto out;
3535
3536 err = -EMSGSIZE;
3537 if ((unsigned)len > sk->sk_sndbuf - 32)
3538 goto out;
3539
3540 err = -ENOBUFS;
3541 skb = alloc_skb(len, GFP_KERNEL);
3542 if (skb == NULL)
3543 goto out;
3544
3545 err = -EFAULT;
3546 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3547 goto out;
3548
3549 hdr = pfkey_get_base_msg(skb, &err);
3550 if (!hdr)
3551 goto out;
3552
4a3e2f71 3553 mutex_lock(&xfrm_cfg_mutex);
1da177e4 3554 err = pfkey_process(sk, skb, hdr);
4a3e2f71 3555 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 3556
3557out:
3558 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3559 err = 0;
3560 if (skb)
3561 kfree_skb(skb);
3562
3563 return err ? : len;
3564}
3565
3566static int pfkey_recvmsg(struct kiocb *kiocb,
3567 struct socket *sock, struct msghdr *msg, size_t len,
3568 int flags)
3569{
3570 struct sock *sk = sock->sk;
83321d6b 3571 struct pfkey_sock *pfk = pfkey_sk(sk);
1da177e4
LT		 3572 struct sk_buff *skb;
3573 int copied, err;
3574
3575 err = -EINVAL;
3576 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3577 goto out;
3578
3579 msg->msg_namelen = 0;
3580 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3581 if (skb == NULL)
3582 goto out;
3583
3584 copied = skb->len;
3585 if (copied > len) {
3586 msg->msg_flags |= MSG_TRUNC;
3587 copied = len;
3588 }
3589
badff6d0 3590 skb_reset_transport_header(skb);
1da177e4
LT		 3591 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3592 if (err)
3593 goto out_free;
3594
3595 sock_recv_timestamp(msg, sk, skb);
3596
3597 err = (flags & MSG_TRUNC) ? skb->len : copied;
3598
83321d6b
TT		 3599 if (pfk->dump.dump != NULL &&
3600 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3601 pfkey_do_dump(pfk);
3602
1da177e4
LT		 3603out_free:
3604 skb_free_datagram(sk, skb);
3605out:
3606 return err;
3607}
3608
90ddc4f0 3609static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3610 .family = PF_KEY,
3611 .owner = THIS_MODULE,
3612 /* Operations that make no sense on pfkey sockets. */
3613 .bind = sock_no_bind,
3614 .connect = sock_no_connect,
3615 .socketpair = sock_no_socketpair,
3616 .accept = sock_no_accept,
3617 .getname = sock_no_getname,
3618 .ioctl = sock_no_ioctl,
3619 .listen = sock_no_listen,
3620 .shutdown = sock_no_shutdown,
3621 .setsockopt = sock_no_setsockopt,
3622 .getsockopt = sock_no_getsockopt,
3623 .mmap = sock_no_mmap,
3624 .sendpage = sock_no_sendpage,
3625
3626 /* Now the operations that really occur. */
3627 .release = pfkey_release,
3628 .poll = datagram_poll,
3629 .sendmsg = pfkey_sendmsg,
3630 .recvmsg = pfkey_recvmsg,
3631};
3632
3633static struct net_proto_family pfkey_family_ops = {
3634 .family = PF_KEY,
3635 .create = pfkey_create,
3636 .owner = THIS_MODULE,
3637};
3638
3639#ifdef CONFIG_PROC_FS
bd2f7476 3640static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3641{
1da177e4 3642 struct sock *s;
1da177e4 3643
bd2f7476
PE		 3644 s = (struct sock *)v;
3645 if (v == SEQ_START_TOKEN)
3646 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3647 else
3648 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4
LT		 3649 s,
3650 atomic_read(&s->sk_refcnt),
3651 atomic_read(&s->sk_rmem_alloc),
3652 atomic_read(&s->sk_wmem_alloc),
3653 sock_i_uid(s),
3654 sock_i_ino(s)
3655 );
bd2f7476
PE		 3656 return 0;
3657}
3658
3659static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3660{
3fa87a32
AD		 3661 struct net *net = &init_net;
3662 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
bd2f7476
PE		 3663 struct sock *s;
3664 struct hlist_node *node;
3665 loff_t pos = *ppos;
1da177e4 3666
bd2f7476
PE		 3667 read_lock(&pfkey_table_lock);
3668 if (pos == 0)
3669 return SEQ_START_TOKEN;
8ff24541 3670
3fa87a32 3671 sk_for_each(s, node, &net_pfkey->table)
bd2f7476
PE		 3672 if (pos-- == 1)
3673 return s;
1da177e4 3674
bd2f7476
PE		 3675 return NULL;
3676}
3677
3678static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3679{
3fa87a32
AD		 3680 struct net *net = &init_net;
3681 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3682
bd2f7476
PE		 3683 ++*ppos;
3684 return (v == SEQ_START_TOKEN) ?
3fa87a32 3685 sk_head(&net_pfkey->table) :
bd2f7476
PE		 3686 sk_next((struct sock *)v);
3687}
1da177e4 3688
bd2f7476
PE		 3689static void pfkey_seq_stop(struct seq_file *f, void *v)
3690{
3691 read_unlock(&pfkey_table_lock);
3692}
1da177e4 3693
bd2f7476
PE		 3694static struct seq_operations pfkey_seq_ops = {
3695 .start = pfkey_seq_start,
3696 .next = pfkey_seq_next,
3697 .stop = pfkey_seq_stop,
3698 .show = pfkey_seq_show,
3699};
1da177e4 3700
bd2f7476
PE		 3701static int pfkey_seq_open(struct inode *inode, struct file *file)
3702{
3703 return seq_open(file, &pfkey_seq_ops);
1da177e4 3704}
61145aa1 3705
bd2f7476
PE		 3706static struct file_operations pfkey_proc_ops = {
3707 .open = pfkey_seq_open,
3708 .read = seq_read,
3709 .llseek = seq_lseek,
3710 .release = seq_release,
3711};
3712
61145aa1
PE		 3713static int pfkey_init_proc(void)
3714{
bd2f7476
PE		 3715 struct proc_dir_entry *e;
3716
d9595a7b 3717 e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops);
bd2f7476 3718 if (e == NULL)
61145aa1 3719 return -ENOMEM;
bd2f7476 3720
bd2f7476 3721 return 0;
61145aa1
PE		 3722}
3723
3724static void pfkey_exit_proc(void)
3725{
d9595a7b 3726 proc_net_remove(&init_net, "pfkey");
61145aa1
PE		 3727}
3728#else
3729static inline int pfkey_init_proc(void)
3730{
3731 return 0;
3732}
3733
3734static inline void pfkey_exit_proc(void)
3735{
3736}
1da177e4
LT		 3737#endif
3738
3739static struct xfrm_mgr pfkeyv2_mgr =
3740{
3741 .id = "pfkeyv2",
3742 .notify = pfkey_send_notify,
3743 .acquire = pfkey_send_acquire,
3744 .compile_policy = pfkey_compile_policy,
3745 .new_mapping = pfkey_send_new_mapping,
26b15dad 3746 .notify_policy = pfkey_send_policy_notify,
08de61be 3747 .migrate = pfkey_send_migrate,
1da177e4
LT		 3748};
3749
3fa87a32
AD		 3750static int __net_init pfkey_net_init(struct net *net)
3751{
3752 struct netns_pfkey *net_pfkey;
3753 int rv;
3754
3755 net_pfkey = kmalloc(sizeof(struct netns_pfkey), GFP_KERNEL);
3756 if (!net_pfkey) {
3757 rv = -ENOMEM;
3758 goto out_kmalloc;
3759 }
3760 INIT_HLIST_HEAD(&net_pfkey->table);
3761 atomic_set(&net_pfkey->socks_nr, 0);
3762 rv = net_assign_generic(net, pfkey_net_id, net_pfkey);
3763 if (rv < 0)
3764 goto out_assign;
3765 return 0;
3766
3767out_assign:
3768 kfree(net_pfkey);
3769out_kmalloc:
3770 return rv;
3771}
3772
3773static void __net_exit pfkey_net_exit(struct net *net)
3774{
3775 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3776
3777 BUG_ON(!hlist_empty(&net_pfkey->table));
3778 kfree(net_pfkey);
3779}
3780
3781static struct pernet_operations pfkey_net_ops = {
3782 .init = pfkey_net_init,
3783 .exit = pfkey_net_exit,
3784};
3785
1da177e4
LT		 3786static void __exit ipsec_pfkey_exit(void)
3787{
3fa87a32 3788 unregister_pernet_gen_subsys(pfkey_net_id, &pfkey_net_ops);
1da177e4 3789 xfrm_unregister_km(&pfkeyv2_mgr);
61145aa1 3790 pfkey_exit_proc();
1da177e4
LT		 3791 sock_unregister(PF_KEY);
3792 proto_unregister(&key_proto);
3793}
3794
3795static int __init ipsec_pfkey_init(void)
3796{
3797 int err = proto_register(&key_proto, 0);
3798
3799 if (err != 0)
3800 goto out;
3801
3802 err = sock_register(&pfkey_family_ops);
3803 if (err != 0)
3804 goto out_unregister_key_proto;
61145aa1
PE		 3805 err = pfkey_init_proc();
3806 if (err != 0)
1da177e4 3807 goto out_sock_unregister;
1da177e4
LT		 3808 err = xfrm_register_km(&pfkeyv2_mgr);
3809 if (err != 0)
3810 goto out_remove_proc_entry;
3fa87a32
AD		 3811 err = register_pernet_gen_subsys(&pfkey_net_id, &pfkey_net_ops);
3812 if (err != 0)
3813 goto out_xfrm_unregister_km;
1da177e4
LT		 3814out:
3815 return err;
3fa87a32
AD		 3816out_xfrm_unregister_km:
3817 xfrm_unregister_km(&pfkeyv2_mgr);
1da177e4 3818out_remove_proc_entry:
61145aa1 3819 pfkey_exit_proc();
1da177e4 3820out_sock_unregister:
1da177e4
LT		 3821 sock_unregister(PF_KEY);
3822out_unregister_key_proto:
3823 proto_unregister(&key_proto);
3824 goto out;
3825}
3826
3827module_init(ipsec_pfkey_init);
3828module_exit(ipsec_pfkey_exit);
3829MODULE_LICENSE("GPL");
3830MODULE_ALIAS_NETPROTO(PF_KEY);
Linux kernel - Deliverables
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