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iwlwifi: don't include iwl-dev.h from iwl-devtrace.h
[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
f99189b1 38static int pfkey_net_id __read_mostly;
3fa87a32
AD		 39struct netns_pfkey {
40 /* List of all pfkey sockets. */
41 struct hlist_head table;
42 atomic_t socks_nr;
43};
7f6b9dbd 44static DEFINE_MUTEX(pfkey_mutex);
1da177e4 45
bd55775c
JHS		 46#define DUMMY_MARK 0
47static struct xfrm_mark dummy_mark = {0, 0};
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
90ddc4f0 111static const struct proto_ops pfkey_ops;
1da177e4
LT		 112
113static void pfkey_insert(struct sock *sk)
114{
3fa87a32
AD		 115 struct net *net = sock_net(sk);
116 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
117
7f6b9dbd 118 mutex_lock(&pfkey_mutex);
119 sk_add_node_rcu(sk, &net_pfkey->table);
120 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 121}
122
123static void pfkey_remove(struct sock *sk)
124{
7f6b9dbd 125 mutex_lock(&pfkey_mutex);
126 sk_del_node_init_rcu(sk);
127 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 128}
129
130static struct proto key_proto = {
131 .name = "KEY",
132 .owner = THIS_MODULE,
133 .obj_size = sizeof(struct pfkey_sock),
134};
135
3f378b68
EP		 136static int pfkey_create(struct net *net, struct socket *sock, int protocol,
137 int kern)
1da177e4 138{
3fa87a32 139 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4
LT		 140 struct sock *sk;
141 int err;
142
143 if (!capable(CAP_NET_ADMIN))
144 return -EPERM;
145 if (sock->type != SOCK_RAW)
146 return -ESOCKTNOSUPPORT;
147 if (protocol != PF_KEY_V2)
148 return -EPROTONOSUPPORT;
149
150 err = -ENOMEM;
6257ff21 151 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
1da177e4
LT		 152 if (sk == NULL)
153 goto out;
8ff24541 154
1da177e4
LT		 155 sock->ops = &pfkey_ops;
156 sock_init_data(sock, sk);
157
158 sk->sk_family = PF_KEY;
159 sk->sk_destruct = pfkey_sock_destruct;
160
3fa87a32 161 atomic_inc(&net_pfkey->socks_nr);
1da177e4
LT		 162
163 pfkey_insert(sk);
164
165 return 0;
166out:
167 return err;
168}
169
170static int pfkey_release(struct socket *sock)
171{
172 struct sock *sk = sock->sk;
173
174 if (!sk)
175 return 0;
176
177 pfkey_remove(sk);
178
179 sock_orphan(sk);
180 sock->sk = NULL;
181 skb_queue_purge(&sk->sk_write_queue);
7f6b9dbd 182
183 synchronize_rcu();
1da177e4
LT		 184 sock_put(sk);
185
186 return 0;
187}
188
189static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
dd0fc66f 190 gfp_t allocation, struct sock *sk)
1da177e4
LT		 191{
192 int err = -ENOBUFS;
193
194 sock_hold(sk);
195 if (*skb2 == NULL) {
196 if (atomic_read(&skb->users) != 1) {
197 *skb2 = skb_clone(skb, allocation);
198 } else {
199 *skb2 = skb;
200 atomic_inc(&skb->users);
201 }
202 }
203 if (*skb2 != NULL) {
204 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
205 skb_orphan(*skb2);
206 skb_set_owner_r(*skb2, sk);
207 skb_queue_tail(&sk->sk_receive_queue, *skb2);
208 sk->sk_data_ready(sk, (*skb2)->len);
209 *skb2 = NULL;
210 err = 0;
211 }
212 }
213 sock_put(sk);
214 return err;
215}
216
217/* Send SKB to all pfkey sockets matching selected criteria. */
218#define BROADCAST_ALL 0
219#define BROADCAST_ONE 1
220#define BROADCAST_REGISTERED 2
221#define BROADCAST_PROMISC_ONLY 4
dd0fc66f 222static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
07fb0f17
AD		 223 int broadcast_flags, struct sock *one_sk,
224 struct net *net)
1da177e4 225{
3fa87a32 226 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4
LT		 227 struct sock *sk;
228 struct hlist_node *node;
229 struct sk_buff *skb2 = NULL;
230 int err = -ESRCH;
231
232 /* XXX Do we need something like netlink_overrun? I think
233 * XXX PF_KEY socket apps will not mind current behavior.
234 */
235 if (!skb)
236 return -ENOMEM;
237
7f6b9dbd 238 rcu_read_lock();
239 sk_for_each_rcu(sk, node, &net_pfkey->table) {
1da177e4
LT		 240 struct pfkey_sock *pfk = pfkey_sk(sk);
241 int err2;
242
243 /* Yes, it means that if you are meant to receive this
244 * pfkey message you receive it twice as promiscuous
245 * socket.
246 */
247 if (pfk->promisc)
248 pfkey_broadcast_one(skb, &skb2, allocation, sk);
249
250 /* the exact target will be processed later */
251 if (sk == one_sk)
252 continue;
253 if (broadcast_flags != BROADCAST_ALL) {
254 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
255 continue;
256 if ((broadcast_flags & BROADCAST_REGISTERED) &&
257 !pfk->registered)
258 continue;
259 if (broadcast_flags & BROADCAST_ONE)
260 continue;
261 }
262
263 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
264
265 /* Error is cleare after succecful sending to at least one
266 * registered KM */
267 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
268 err = err2;
269 }
7f6b9dbd 270 rcu_read_unlock();
1da177e4
LT		 271
272 if (one_sk != NULL)
273 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
274
6f961068 275 kfree_skb(skb2);
1da177e4
LT		 276 kfree_skb(skb);
277 return err;
278}
279
05238204
TT		 280static int pfkey_do_dump(struct pfkey_sock *pfk)
281{
12a169e7 282 struct sadb_msg *hdr;
05238204
TT		 283 int rc;
284
285 rc = pfk->dump.dump(pfk);
286 if (rc == -ENOBUFS)
287 return 0;
288
12a169e7
HX		 289 if (pfk->dump.skb) {
290 if (!pfkey_can_dump(&pfk->sk))
291 return 0;
292
293 hdr = (struct sadb_msg *) pfk->dump.skb->data;
294 hdr->sadb_msg_seq = 0;
295 hdr->sadb_msg_errno = rc;
296 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 297 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 298 pfk->dump.skb = NULL;
299 }
300
05238204
TT		 301 pfkey_terminate_dump(pfk);
302 return rc;
303}
304
1da177e4
LT		 305static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
306{
307 *new = *orig;
308}
309
310static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
311{
312 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
313 struct sadb_msg *hdr;
314
315 if (!skb)
316 return -ENOBUFS;
317
318 /* Woe be to the platform trying to support PFKEY yet
319 * having normal errnos outside the 1-255 range, inclusive.
320 */
321 err = -err;
322 if (err == ERESTARTSYS ||
323 err == ERESTARTNOHAND ||
324 err == ERESTARTNOINTR)
325 err = EINTR;
326 if (err >= 512)
327 err = EINVAL;
09a62660 328 BUG_ON(err <= 0 || err >= 256);
1da177e4
LT		 329
330 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
331 pfkey_hdr_dup(hdr, orig);
332 hdr->sadb_msg_errno = (uint8_t) err;
333 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
334 sizeof(uint64_t));
335
07fb0f17 336 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 337
338 return 0;
339}
340
341static u8 sadb_ext_min_len[] = {
342 [SADB_EXT_RESERVED] = (u8) 0,
343 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
344 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
345 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
346 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
347 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
348 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
349 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
350 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
351 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
352 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
353 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
354 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
355 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
356 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
357 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
358 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
359 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
360 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
361 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
362 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
363 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
364 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
365 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
df71837d 366 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
13c1d189 367 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
1da177e4
LT		 368};
369
370/* Verify sadb_address_{len,prefixlen} against sa_family. */
371static int verify_address_len(void *p)
372{
373 struct sadb_address *sp = p;
374 struct sockaddr *addr = (struct sockaddr *)(sp + 1);
375 struct sockaddr_in *sin;
376#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
377 struct sockaddr_in6 *sin6;
378#endif
379 int len;
380
381 switch (addr->sa_family) {
382 case AF_INET:
356f89e1 383 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
1da177e4
LT		 384 if (sp->sadb_address_len != len ||
385 sp->sadb_address_prefixlen > 32)
386 return -EINVAL;
387 break;
388#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
389 case AF_INET6:
356f89e1 390 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
1da177e4
LT		 391 if (sp->sadb_address_len != len ||
392 sp->sadb_address_prefixlen > 128)
393 return -EINVAL;
394 break;
395#endif
396 default:
397 /* It is user using kernel to keep track of security
398 * associations for another protocol, such as
399 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
400 * lengths.
401 *
402 * XXX Actually, association/policy database is not yet
403 * XXX able to cope with arbitrary sockaddr families.
404 * XXX When it can, remove this -EINVAL. -DaveM
405 */
406 return -EINVAL;
407 break;
3ff50b79 408 }
1da177e4
LT		 409
410 return 0;
411}
412
df71837d
TJ		 413static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
414{
356f89e1
IJ		 415 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
416 sec_ctx->sadb_x_ctx_len,
417 sizeof(uint64_t));
df71837d
TJ		 418}
419
420static inline int verify_sec_ctx_len(void *p)
421{
422 struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
298bb621 423 int len = sec_ctx->sadb_x_ctx_len;
df71837d 424
298bb621 425 if (len > PAGE_SIZE)
df71837d
TJ		 426 return -EINVAL;
427
428 len = pfkey_sec_ctx_len(sec_ctx);
429
430 if (sec_ctx->sadb_x_sec_len != len)
431 return -EINVAL;
432
433 return 0;
434}
435
436static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
437{
438 struct xfrm_user_sec_ctx *uctx = NULL;
439 int ctx_size = sec_ctx->sadb_x_ctx_len;
440
441 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
442
443 if (!uctx)
444 return NULL;
445
446 uctx->len = pfkey_sec_ctx_len(sec_ctx);
447 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
448 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
449 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
450 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
451 memcpy(uctx + 1, sec_ctx + 1,
452 uctx->ctx_len);
453
454 return uctx;
455}
456
1da177e4
LT		 457static int present_and_same_family(struct sadb_address *src,
458 struct sadb_address *dst)
459{
460 struct sockaddr *s_addr, *d_addr;
461
462 if (!src || !dst)
463 return 0;
464
465 s_addr = (struct sockaddr *)(src + 1);
466 d_addr = (struct sockaddr *)(dst + 1);
467 if (s_addr->sa_family != d_addr->sa_family)
468 return 0;
469 if (s_addr->sa_family != AF_INET
470#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
471 && s_addr->sa_family != AF_INET6
472#endif
473 )
474 return 0;
475
476 return 1;
477}
478
479static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
480{
481 char *p = (char *) hdr;
482 int len = skb->len;
483
484 len -= sizeof(*hdr);
485 p += sizeof(*hdr);
486 while (len > 0) {
487 struct sadb_ext *ehdr = (struct sadb_ext *) p;
488 uint16_t ext_type;
489 int ext_len;
490
491 ext_len = ehdr->sadb_ext_len;
492 ext_len *= sizeof(uint64_t);
493 ext_type = ehdr->sadb_ext_type;
494 if (ext_len < sizeof(uint64_t) ||
495 ext_len > len ||
496 ext_type == SADB_EXT_RESERVED)
497 return -EINVAL;
498
499 if (ext_type <= SADB_EXT_MAX) {
500 int min = (int) sadb_ext_min_len[ext_type];
501 if (ext_len < min)
502 return -EINVAL;
503 if (ext_hdrs[ext_type-1] != NULL)
504 return -EINVAL;
505 if (ext_type == SADB_EXT_ADDRESS_SRC ||
506 ext_type == SADB_EXT_ADDRESS_DST ||
507 ext_type == SADB_EXT_ADDRESS_PROXY ||
508 ext_type == SADB_X_EXT_NAT_T_OA) {
509 if (verify_address_len(p))
510 return -EINVAL;
8ff24541 511 }
df71837d
TJ		 512 if (ext_type == SADB_X_EXT_SEC_CTX) {
513 if (verify_sec_ctx_len(p))
514 return -EINVAL;
515 }
1da177e4
LT		 516 ext_hdrs[ext_type-1] = p;
517 }
518 p += ext_len;
519 len -= ext_len;
520 }
521
522 return 0;
523}
524
525static uint16_t
526pfkey_satype2proto(uint8_t satype)
527{
528 switch (satype) {
529 case SADB_SATYPE_UNSPEC:
530 return IPSEC_PROTO_ANY;
531 case SADB_SATYPE_AH:
532 return IPPROTO_AH;
533 case SADB_SATYPE_ESP:
534 return IPPROTO_ESP;
535 case SADB_X_SATYPE_IPCOMP:
536 return IPPROTO_COMP;
537 break;
538 default:
539 return 0;
540 }
541 /* NOTREACHED */
542}
543
544static uint8_t
545pfkey_proto2satype(uint16_t proto)
546{
547 switch (proto) {
548 case IPPROTO_AH:
549 return SADB_SATYPE_AH;
550 case IPPROTO_ESP:
551 return SADB_SATYPE_ESP;
552 case IPPROTO_COMP:
553 return SADB_X_SATYPE_IPCOMP;
554 break;
555 default:
556 return 0;
557 }
558 /* NOTREACHED */
559}
560
561/* BTW, this scheme means that there is no way with PFKEY2 sockets to
562 * say specifically 'just raw sockets' as we encode them as 255.
563 */
564
565static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
566{
567 return (proto == IPSEC_PROTO_ANY ? 0 : proto);
568}
569
570static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
571{
572 return (proto ? proto : IPSEC_PROTO_ANY);
573}
574
9e8b4ed8
YH		 575static inline int pfkey_sockaddr_len(sa_family_t family)
576{
577 switch (family) {
578 case AF_INET:
579 return sizeof(struct sockaddr_in);
580#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
581 case AF_INET6:
582 return sizeof(struct sockaddr_in6);
583#endif
584 }
585 return 0;
586}
587
5f95ac91
YH		 588static
589int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
1da177e4 590{
5f95ac91 591 switch (sa->sa_family) {
1da177e4 592 case AF_INET:
8ff24541 593 xaddr->a4 =
5f95ac91 594 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
1da177e4
LT		 595 return AF_INET;
596#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
597 case AF_INET6:
8ff24541 598 memcpy(xaddr->a6,
5f95ac91 599 &((struct sockaddr_in6 *)sa)->sin6_addr,
1da177e4
LT		 600 sizeof(struct in6_addr));
601 return AF_INET6;
602#endif
1da177e4 603 }
5f95ac91
YH		 604 return 0;
605}
606
607static
608int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
609{
610 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
611 xaddr);
1da177e4
LT		 612}
613
07fb0f17 614static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, struct sadb_msg *hdr, void **ext_hdrs)
1da177e4
LT		 615{
616 struct sadb_sa *sa;
617 struct sadb_address *addr;
618 uint16_t proto;
619 unsigned short family;
620 xfrm_address_t *xaddr;
621
622 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
623 if (sa == NULL)
624 return NULL;
625
626 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
627 if (proto == 0)
628 return NULL;
629
630 /* sadb_address_len should be checked by caller */
631 addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
632 if (addr == NULL)
633 return NULL;
634
635 family = ((struct sockaddr *)(addr + 1))->sa_family;
636 switch (family) {
637 case AF_INET:
638 xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
639 break;
640#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
641 case AF_INET6:
642 xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
643 break;
644#endif
645 default:
646 xaddr = NULL;
647 }
648
649 if (!xaddr)
650 return NULL;
651
bd55775c 652 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
1da177e4
LT		 653}
654
655#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
9e8b4ed8 656
1da177e4
LT		 657static int
658pfkey_sockaddr_size(sa_family_t family)
659{
9e8b4ed8 660 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
1da177e4
LT		 661}
662
55569ce2
KM		 663static inline int pfkey_mode_from_xfrm(int mode)
664{
665 switch(mode) {
666 case XFRM_MODE_TRANSPORT:
667 return IPSEC_MODE_TRANSPORT;
668 case XFRM_MODE_TUNNEL:
669 return IPSEC_MODE_TUNNEL;
670 case XFRM_MODE_BEET:
671 return IPSEC_MODE_BEET;
672 default:
673 return -1;
674 }
675}
676
677static inline int pfkey_mode_to_xfrm(int mode)
678{
679 switch(mode) {
680 case IPSEC_MODE_ANY: /*XXX*/
681 case IPSEC_MODE_TRANSPORT:
682 return XFRM_MODE_TRANSPORT;
683 case IPSEC_MODE_TUNNEL:
684 return XFRM_MODE_TUNNEL;
685 case IPSEC_MODE_BEET:
686 return XFRM_MODE_BEET;
687 default:
688 return -1;
689 }
690}
691
e5b56652
YH		 692static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port,
693 struct sockaddr *sa,
694 unsigned short family)
695{
696 switch (family) {
697 case AF_INET:
698 {
699 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
700 sin->sin_family = AF_INET;
701 sin->sin_port = port;
702 sin->sin_addr.s_addr = xaddr->a4;
703 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
704 return 32;
705 }
706#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
707 case AF_INET6:
708 {
709 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
710 sin6->sin6_family = AF_INET6;
711 sin6->sin6_port = port;
712 sin6->sin6_flowinfo = 0;
713 ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6);
714 sin6->sin6_scope_id = 0;
715 return 128;
716 }
717#endif
718 }
719 return 0;
720}
721
050f009e
HX		 722static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
723 int add_keys, int hsc)
1da177e4
LT		 724{
725 struct sk_buff *skb;
726 struct sadb_msg *hdr;
727 struct sadb_sa *sa;
728 struct sadb_lifetime *lifetime;
729 struct sadb_address *addr;
730 struct sadb_key *key;
731 struct sadb_x_sa2 *sa2;
df71837d
TJ		 732 struct sadb_x_sec_ctx *sec_ctx;
733 struct xfrm_sec_ctx *xfrm_ctx;
734 int ctx_size = 0;
1da177e4
LT		 735 int size;
736 int auth_key_size = 0;
737 int encrypt_key_size = 0;
738 int sockaddr_size;
739 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 740 int mode;
1da177e4
LT		 741
742 /* address family check */
743 sockaddr_size = pfkey_sockaddr_size(x->props.family);
744 if (!sockaddr_size)
745 return ERR_PTR(-EINVAL);
746
747 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
748 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 749 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 750 sizeof(struct sadb_lifetime) +
751 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
752 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 753 sizeof(struct sadb_address)*2 +
1da177e4
LT		 754 sockaddr_size*2 +
755 sizeof(struct sadb_x_sa2);
df71837d
TJ		 756
757 if ((xfrm_ctx = x->security)) {
758 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
759 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
760 }
761
1da177e4 762 /* identity & sensitivity */
81b302a3 763 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
1da177e4
LT		 764 size += sizeof(struct sadb_address) + sockaddr_size;
765
766 if (add_keys) {
767 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 768 auth_key_size =
769 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 770 size += sizeof(struct sadb_key) + auth_key_size;
771 }
772 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 773 encrypt_key_size =
774 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 775 size += sizeof(struct sadb_key) + encrypt_key_size;
776 }
777 }
778 if (x->encap)
779 natt = x->encap;
780
781 if (natt && natt->encap_type) {
782 size += sizeof(struct sadb_x_nat_t_type);
783 size += sizeof(struct sadb_x_nat_t_port);
784 size += sizeof(struct sadb_x_nat_t_port);
785 }
786
787 skb = alloc_skb(size + 16, GFP_ATOMIC);
788 if (skb == NULL)
789 return ERR_PTR(-ENOBUFS);
790
791 /* call should fill header later */
792 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
793 memset(hdr, 0, size); /* XXX do we need this ? */
794 hdr->sadb_msg_len = size / sizeof(uint64_t);
795
796 /* sa */
797 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
798 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
799 sa->sadb_sa_exttype = SADB_EXT_SA;
800 sa->sadb_sa_spi = x->id.spi;
801 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 802 switch (x->km.state) {
803 case XFRM_STATE_VALID:
804 sa->sadb_sa_state = x->km.dying ?
805 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
806 break;
807 case XFRM_STATE_ACQ:
1da177e4 808 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 809 break;
810 default:
1da177e4 811 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 812 break;
813 }
1da177e4
LT		 814 sa->sadb_sa_auth = 0;
815 if (x->aalg) {
816 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
817 sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
818 }
819 sa->sadb_sa_encrypt = 0;
820 BUG_ON(x->ealg && x->calg);
821 if (x->ealg) {
822 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
823 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
824 }
825 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
826 if (x->calg) {
827 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
828 sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
829 }
830
831 sa->sadb_sa_flags = 0;
832 if (x->props.flags & XFRM_STATE_NOECN)
833 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
834 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
835 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 836 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
837 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 838
839 /* hard time */
840 if (hsc & 2) {
8ff24541 841 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 842 sizeof(struct sadb_lifetime));
843 lifetime->sadb_lifetime_len =
844 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
845 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
846 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
847 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
848 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
849 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
850 }
851 /* soft time */
852 if (hsc & 1) {
8ff24541 853 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 854 sizeof(struct sadb_lifetime));
855 lifetime->sadb_lifetime_len =
856 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
857 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
858 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
859 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
860 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
861 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
862 }
863 /* current time */
864 lifetime = (struct sadb_lifetime *) skb_put(skb,
865 sizeof(struct sadb_lifetime));
866 lifetime->sadb_lifetime_len =
867 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
868 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
869 lifetime->sadb_lifetime_allocations = x->curlft.packets;
870 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
871 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
872 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
873 /* src address */
8ff24541 874 addr = (struct sadb_address*) skb_put(skb,
1da177e4 875 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 876 addr->sadb_address_len =
1da177e4
LT		 877 (sizeof(struct sadb_address)+sockaddr_size)/
878 sizeof(uint64_t);
879 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 880 /* "if the ports are non-zero, then the sadb_address_proto field,
881 normally zero, MUST be filled in with the transport
1da177e4 882 protocol's number." - RFC2367 */
8ff24541 883 addr->sadb_address_proto = 0;
1da177e4 884 addr->sadb_address_reserved = 0;
1da177e4 885
e5b56652
YH		 886 addr->sadb_address_prefixlen =
887 pfkey_sockaddr_fill(&x->props.saddr, 0,
888 (struct sockaddr *) (addr + 1),
889 x->props.family);
890 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 891 BUG();
892
893 /* dst address */
8ff24541 894 addr = (struct sadb_address*) skb_put(skb,
1da177e4 895 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 896 addr->sadb_address_len =
1da177e4
LT		 897 (sizeof(struct sadb_address)+sockaddr_size)/
898 sizeof(uint64_t);
899 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
8ff24541 900 addr->sadb_address_proto = 0;
1da177e4 901 addr->sadb_address_reserved = 0;
1da177e4 902
e5b56652
YH		 903 addr->sadb_address_prefixlen =
904 pfkey_sockaddr_fill(&x->id.daddr, 0,
905 (struct sockaddr *) (addr + 1),
906 x->props.family);
907 if (!addr->sadb_address_prefixlen)
908 BUG();
1da177e4 909
e5b56652
YH		 910 if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
911 x->props.family)) {
912 addr = (struct sadb_address*) skb_put(skb,
913 sizeof(struct sadb_address)+sockaddr_size);
914 addr->sadb_address_len =
915 (sizeof(struct sadb_address)+sockaddr_size)/
916 sizeof(uint64_t);
917 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
918 addr->sadb_address_proto =
919 pfkey_proto_from_xfrm(x->sel.proto);
920 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
921 addr->sadb_address_reserved = 0;
1da177e4 922
e5b56652
YH		 923 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
924 (struct sockaddr *) (addr + 1),
925 x->props.family);
1da177e4 926 }
1da177e4
LT		 927
928 /* auth key */
929 if (add_keys && auth_key_size) {
8ff24541 930 key = (struct sadb_key *) skb_put(skb,
1da177e4
LT		 931 sizeof(struct sadb_key)+auth_key_size);
932 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
933 sizeof(uint64_t);
934 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
935 key->sadb_key_bits = x->aalg->alg_key_len;
936 key->sadb_key_reserved = 0;
937 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
938 }
939 /* encrypt key */
940 if (add_keys && encrypt_key_size) {
8ff24541 941 key = (struct sadb_key *) skb_put(skb,
1da177e4 942 sizeof(struct sadb_key)+encrypt_key_size);
8ff24541 943 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 944 encrypt_key_size) / sizeof(uint64_t);
945 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
946 key->sadb_key_bits = x->ealg->alg_key_len;
947 key->sadb_key_reserved = 0;
8ff24541 948 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 949 (x->ealg->alg_key_len+7)/8);
950 }
951
952 /* sa */
953 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
954 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
955 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 956 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
957 kfree_skb(skb);
958 return ERR_PTR(-EINVAL);
959 }
960 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 961 sa2->sadb_x_sa2_reserved1 = 0;
962 sa2->sadb_x_sa2_reserved2 = 0;
963 sa2->sadb_x_sa2_sequence = 0;
964 sa2->sadb_x_sa2_reqid = x->props.reqid;
965
966 if (natt && natt->encap_type) {
967 struct sadb_x_nat_t_type *n_type;
968 struct sadb_x_nat_t_port *n_port;
969
970 /* type */
971 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
972 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
973 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
974 n_type->sadb_x_nat_t_type_type = natt->encap_type;
975 n_type->sadb_x_nat_t_type_reserved[0] = 0;
976 n_type->sadb_x_nat_t_type_reserved[1] = 0;
977 n_type->sadb_x_nat_t_type_reserved[2] = 0;
978
979 /* source port */
980 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
981 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
982 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
983 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
984 n_port->sadb_x_nat_t_port_reserved = 0;
985
986 /* dest port */
987 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
988 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
989 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
990 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
991 n_port->sadb_x_nat_t_port_reserved = 0;
992 }
993
df71837d
TJ		 994 /* security context */
995 if (xfrm_ctx) {
996 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
997 sizeof(struct sadb_x_sec_ctx) + ctx_size);
998 sec_ctx->sadb_x_sec_len =
999 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1000 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1001 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1002 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1003 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1004 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1005 xfrm_ctx->ctx_len);
1006 }
1007
1da177e4
LT		 1008 return skb;
1009}
1010
050f009e
HX		 1011
1012static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
1013{
1014 struct sk_buff *skb;
1015
050f009e 1016 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1017
1018 return skb;
1019}
1020
1021static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
1022 int hsc)
1023{
1024 return __pfkey_xfrm_state2msg(x, 0, hsc);
1025}
1026
07fb0f17
AD		 1027static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
1028 struct sadb_msg *hdr,
1da177e4
LT		 1029 void **ext_hdrs)
1030{
8ff24541 1031 struct xfrm_state *x;
1da177e4
LT		 1032 struct sadb_lifetime *lifetime;
1033 struct sadb_sa *sa;
1034 struct sadb_key *key;
df71837d 1035 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1036 uint16_t proto;
1037 int err;
8ff24541 1038
1da177e4
LT		 1039
1040 sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
1041 if (!sa ||
1042 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1043 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1044 return ERR_PTR(-EINVAL);
1045 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1046 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1047 return ERR_PTR(-EINVAL);
1048 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1049 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1050 return ERR_PTR(-EINVAL);
1051 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1052 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1053 return ERR_PTR(-EINVAL);
1054
1055 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1056 if (proto == 0)
1057 return ERR_PTR(-EINVAL);
1058
1059 /* default error is no buffer space */
1060 err = -ENOBUFS;
1061
1062 /* RFC2367:
1063
1064 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1065 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1066 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1067 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1068 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1069 not true.
1070
8ff24541 1071 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1072 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1073 */
1074 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1075 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1076 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1077 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1078 return ERR_PTR(-EINVAL);
1079 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1080 if (key != NULL &&
1081 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1082 ((key->sadb_key_bits+7) / 8 == 0 ||
1083 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1084 return ERR_PTR(-EINVAL);
1085 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1086 if (key != NULL &&
1087 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1088 ((key->sadb_key_bits+7) / 8 == 0 ||
1089 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1090 return ERR_PTR(-EINVAL);
1091
07fb0f17 1092 x = xfrm_state_alloc(net);
1da177e4
LT		 1093 if (x == NULL)
1094 return ERR_PTR(-ENOBUFS);
1095
1096 x->id.proto = proto;
1097 x->id.spi = sa->sadb_sa_spi;
1098 x->props.replay_window = sa->sadb_sa_replay;
1099 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1100 x->props.flags |= XFRM_STATE_NOECN;
1101 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1102 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1103 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1104 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4
LT		 1105
1106 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
1107 if (lifetime != NULL) {
1108 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1109 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1110 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1111 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1112 }
1113 lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
1114 if (lifetime != NULL) {
1115 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1116 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1117 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1118 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1119 }
df71837d
TJ		 1120
1121 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
1122 if (sec_ctx != NULL) {
1123 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1124
1125 if (!uctx)
1126 goto out;
1127
1128 err = security_xfrm_state_alloc(x, uctx);
1129 kfree(uctx);
1130
1131 if (err)
1132 goto out;
1133 }
1134
1da177e4
LT		 1135 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
1136 if (sa->sadb_sa_auth) {
1137 int keysize = 0;
1138 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
1139 if (!a) {
1140 err = -ENOSYS;
1141 goto out;
1142 }
1143 if (key)
1144 keysize = (key->sadb_key_bits + 7) / 8;
1145 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1146 if (!x->aalg)
1147 goto out;
1148 strcpy(x->aalg->alg_name, a->name);
1149 x->aalg->alg_key_len = 0;
1150 if (key) {
1151 x->aalg->alg_key_len = key->sadb_key_bits;
1152 memcpy(x->aalg->alg_key, key+1, keysize);
1153 }
c20a66f4 1154 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1da177e4
LT		 1155 x->props.aalgo = sa->sadb_sa_auth;
1156 /* x->algo.flags = sa->sadb_sa_flags; */
1157 }
1158 if (sa->sadb_sa_encrypt) {
1159 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1160 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
1161 if (!a) {
1162 err = -ENOSYS;
1163 goto out;
1164 }
1165 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1166 if (!x->calg)
1167 goto out;
1168 strcpy(x->calg->alg_name, a->name);
1169 x->props.calgo = sa->sadb_sa_encrypt;
1170 } else {
1171 int keysize = 0;
1172 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
1173 if (!a) {
1174 err = -ENOSYS;
1175 goto out;
1176 }
1177 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1178 if (key)
1179 keysize = (key->sadb_key_bits + 7) / 8;
1180 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1181 if (!x->ealg)
1182 goto out;
1183 strcpy(x->ealg->alg_name, a->name);
1184 x->ealg->alg_key_len = 0;
1185 if (key) {
1186 x->ealg->alg_key_len = key->sadb_key_bits;
1187 memcpy(x->ealg->alg_key, key+1, keysize);
1188 }
1189 x->props.ealgo = sa->sadb_sa_encrypt;
1190 }
1191 }
1192 /* x->algo.flags = sa->sadb_sa_flags; */
1193
8ff24541 1194 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 1195 &x->props.saddr);
1196 if (!x->props.family) {
1197 err = -EAFNOSUPPORT;
1198 goto out;
1199 }
8ff24541 1200 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1201 &x->id.daddr);
1202
1203 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
1204 struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1205 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206 if (mode < 0) {
1207 err = -EINVAL;
1208 goto out;
1209 }
1210 x->props.mode = mode;
1da177e4
LT		 1211 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212 }
1213
1214 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
1215 struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1216
1217 /* Nobody uses this, but we try. */
1218 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220 }
1221
4da51056 1222 if (!x->sel.family)
4a4b6271
JL		 1223 x->sel.family = x->props.family;
1224
1da177e4
LT		 1225 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
1226 struct sadb_x_nat_t_type* n_type;
1227 struct xfrm_encap_tmpl *natt;
1228
1229 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230 if (!x->encap)
1231 goto out;
1232
1233 natt = x->encap;
1234 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
1238 struct sadb_x_nat_t_port* n_port =
1239 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241 }
1242 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
1243 struct sadb_x_nat_t_port* n_port =
1244 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246 }
a8d694c6 1247 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1da177e4
LT		 1248 }
1249
72cb6962
HX		 1250 err = xfrm_init_state(x);
1251 if (err)
1da177e4 1252 goto out;
72cb6962 1253
1da177e4 1254 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1255 return x;
1256
1257out:
1258 x->km.state = XFRM_STATE_DEAD;
1259 xfrm_state_put(x);
1260 return ERR_PTR(err);
1261}
1262
1263static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1264{
1265 return -EOPNOTSUPP;
1266}
1267
1268static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1269{
07fb0f17 1270 struct net *net = sock_net(sk);
1da177e4
LT		 1271 struct sk_buff *resp_skb;
1272 struct sadb_x_sa2 *sa2;
1273 struct sadb_address *saddr, *daddr;
1274 struct sadb_msg *out_hdr;
658b219e 1275 struct sadb_spirange *range;
1da177e4 1276 struct xfrm_state *x = NULL;
55569ce2 1277 int mode;
658b219e
HX		 1278 int err;
1279 u32 min_spi, max_spi;
1da177e4
LT		 1280 u32 reqid;
1281 u8 proto;
1282 unsigned short family;
1283 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1284
1285 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1286 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1287 return -EINVAL;
1288
1289 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1290 if (proto == 0)
1291 return -EINVAL;
1292
1293 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1294 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1295 if (mode < 0)
1296 return -EINVAL;
1da177e4
LT		 1297 reqid = sa2->sadb_x_sa2_reqid;
1298 } else {
1299 mode = 0;
1300 reqid = 0;
1301 }
1302
1303 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1304 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1305
1306 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1307 switch (family) {
1308 case AF_INET:
1309 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1310 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1311 break;
1312#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1313 case AF_INET6:
1314 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1315 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1316 break;
1317#endif
1318 }
1319
1320 if (hdr->sadb_msg_seq) {
bd55775c 1321 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1da177e4
LT		 1322 if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
1323 xfrm_state_put(x);
1324 x = NULL;
1325 }
1326 }
1327
1328 if (!x)
bd55775c 1329 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1da177e4
LT		 1330
1331 if (x == NULL)
1332 return -ENOENT;
1333
658b219e
HX		 1334 min_spi = 0x100;
1335 max_spi = 0x0fffffff;
1da177e4 1336
658b219e
HX		 1337 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1338 if (range) {
1339 min_spi = range->sadb_spirange_min;
1340 max_spi = range->sadb_spirange_max;
1da177e4 1341 }
658b219e
HX		 1342
1343 err = xfrm_alloc_spi(x, min_spi, max_spi);
050f009e 1344 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1345
1346 if (IS_ERR(resp_skb)) {
1347 xfrm_state_put(x);
1348 return PTR_ERR(resp_skb);
1349 }
1350
1351 out_hdr = (struct sadb_msg *) resp_skb->data;
1352 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1353 out_hdr->sadb_msg_type = SADB_GETSPI;
1354 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1355 out_hdr->sadb_msg_errno = 0;
1356 out_hdr->sadb_msg_reserved = 0;
1357 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1358 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1359
1360 xfrm_state_put(x);
1361
07fb0f17 1362 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1da177e4
LT		 1363
1364 return 0;
1365}
1366
1367static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1368{
07fb0f17 1369 struct net *net = sock_net(sk);
1da177e4
LT		 1370 struct xfrm_state *x;
1371
1372 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1373 return -EOPNOTSUPP;
1374
1375 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1376 return 0;
1377
bd55775c 1378 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1da177e4
LT		 1379 if (x == NULL)
1380 return 0;
1381
1382 spin_lock_bh(&x->lock);
1383 if (x->km.state == XFRM_STATE_ACQ) {
1384 x->km.state = XFRM_STATE_ERROR;
07fb0f17 1385 wake_up(&net->xfrm.km_waitq);
1da177e4
LT		 1386 }
1387 spin_unlock_bh(&x->lock);
1388 xfrm_state_put(x);
1389 return 0;
1390}
1391
26b15dad
JHS		 1392static inline int event2poltype(int event)
1393{
1394 switch (event) {
f60f6b8f 1395 case XFRM_MSG_DELPOLICY:
26b15dad 1396 return SADB_X_SPDDELETE;
f60f6b8f 1397 case XFRM_MSG_NEWPOLICY:
26b15dad 1398 return SADB_X_SPDADD;
f60f6b8f 1399 case XFRM_MSG_UPDPOLICY:
26b15dad 1400 return SADB_X_SPDUPDATE;
f60f6b8f 1401 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1402 // return SADB_X_SPDEXPIRE;
1403 default:
1404 printk("pfkey: Unknown policy event %d\n", event);
1405 break;
1406 }
1407
1408 return 0;
1409}
1410
1411static inline int event2keytype(int event)
1412{
1413 switch (event) {
f60f6b8f 1414 case XFRM_MSG_DELSA:
26b15dad 1415 return SADB_DELETE;
f60f6b8f 1416 case XFRM_MSG_NEWSA:
26b15dad 1417 return SADB_ADD;
f60f6b8f 1418 case XFRM_MSG_UPDSA:
26b15dad 1419 return SADB_UPDATE;
f60f6b8f 1420 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1421 return SADB_EXPIRE;
1422 default:
1423 printk("pfkey: Unknown SA event %d\n", event);
1424 break;
1425 }
1426
1427 return 0;
1428}
1429
1430/* ADD/UPD/DEL */
1431static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
1432{
1433 struct sk_buff *skb;
1434 struct sadb_msg *hdr;
26b15dad 1435
050f009e 1436 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1437
1438 if (IS_ERR(skb))
1439 return PTR_ERR(skb);
1440
1441 hdr = (struct sadb_msg *) skb->data;
1442 hdr->sadb_msg_version = PF_KEY_V2;
1443 hdr->sadb_msg_type = event2keytype(c->event);
1444 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1445 hdr->sadb_msg_errno = 0;
1446 hdr->sadb_msg_reserved = 0;
1447 hdr->sadb_msg_seq = c->seq;
1448 hdr->sadb_msg_pid = c->pid;
1449
07fb0f17 1450 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
26b15dad
JHS		 1451
1452 return 0;
1453}
1da177e4
LT		 1454
1455static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1456{
07fb0f17 1457 struct net *net = sock_net(sk);
1da177e4
LT		 1458 struct xfrm_state *x;
1459 int err;
26b15dad 1460 struct km_event c;
1da177e4 1461
07fb0f17 1462 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1da177e4
LT		 1463 if (IS_ERR(x))
1464 return PTR_ERR(x);
1465
26b15dad 1466 xfrm_state_hold(x);
1da177e4
LT		 1467 if (hdr->sadb_msg_type == SADB_ADD)
1468 err = xfrm_state_add(x);
1469 else
1470 err = xfrm_state_update(x);
1471
ab5f5e8b 1472 xfrm_audit_state_add(x, err ? 0 : 1,
2532386f
EP		 1473 audit_get_loginuid(current),
1474 audit_get_sessionid(current), 0);
161a09e7 1475
1da177e4
LT		 1476 if (err < 0) {
1477 x->km.state = XFRM_STATE_DEAD;
21380b81 1478 __xfrm_state_put(x);
7d6dfe1f 1479 goto out;
1da177e4
LT		 1480 }
1481
26b15dad 1482 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1483 c.event = XFRM_MSG_NEWSA;
26b15dad 1484 else
f60f6b8f 1485 c.event = XFRM_MSG_UPDSA;
26b15dad
JHS		 1486 c.seq = hdr->sadb_msg_seq;
1487 c.pid = hdr->sadb_msg_pid;
1488 km_state_notify(x, &c);
7d6dfe1f 1489out:
26b15dad 1490 xfrm_state_put(x);
26b15dad 1491 return err;
1da177e4
LT		 1492}
1493
1494static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1495{
07fb0f17 1496 struct net *net = sock_net(sk);
1da177e4 1497 struct xfrm_state *x;
26b15dad
JHS		 1498 struct km_event c;
1499 int err;
1da177e4
LT		 1500
1501 if (!ext_hdrs[SADB_EXT_SA-1] ||
1502 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1503 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1504 return -EINVAL;
1505
07fb0f17 1506 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1507 if (x == NULL)
1508 return -ESRCH;
1509
c8c05a8e
CZ		 1510 if ((err = security_xfrm_state_delete(x)))
1511 goto out;
1512
1da177e4 1513 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1514 err = -EPERM;
1515 goto out;
1da177e4 1516 }
161a09e7 1517
26b15dad 1518 err = xfrm_state_delete(x);
161a09e7 1519
c8c05a8e
CZ		 1520 if (err < 0)
1521 goto out;
1da177e4 1522
26b15dad
JHS		 1523 c.seq = hdr->sadb_msg_seq;
1524 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1525 c.event = XFRM_MSG_DELSA;
26b15dad 1526 km_state_notify(x, &c);
c8c05a8e 1527out:
ab5f5e8b 1528 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 1529 audit_get_loginuid(current),
1530 audit_get_sessionid(current), 0);
26b15dad 1531 xfrm_state_put(x);
1da177e4 1532
26b15dad 1533 return err;
1da177e4
LT		 1534}
1535
1536static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1537{
07fb0f17 1538 struct net *net = sock_net(sk);
1da177e4
LT		 1539 __u8 proto;
1540 struct sk_buff *out_skb;
1541 struct sadb_msg *out_hdr;
1542 struct xfrm_state *x;
1543
1544 if (!ext_hdrs[SADB_EXT_SA-1] ||
1545 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1546 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1547 return -EINVAL;
1548
07fb0f17 1549 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1550 if (x == NULL)
1551 return -ESRCH;
1552
050f009e 1553 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1554 proto = x->id.proto;
1555 xfrm_state_put(x);
1556 if (IS_ERR(out_skb))
1557 return PTR_ERR(out_skb);
1558
1559 out_hdr = (struct sadb_msg *) out_skb->data;
1560 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1561 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1562 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1563 out_hdr->sadb_msg_errno = 0;
1564 out_hdr->sadb_msg_reserved = 0;
1565 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1566 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
07fb0f17 1567 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 1568
1569 return 0;
1570}
1571
00fa0233 1572static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
dd0fc66f 1573 gfp_t allocation)
1da177e4
LT		 1574{
1575 struct sk_buff *skb;
1576 struct sadb_msg *hdr;
1577 int len, auth_len, enc_len, i;
1578
1579 auth_len = xfrm_count_auth_supported();
1580 if (auth_len) {
1581 auth_len *= sizeof(struct sadb_alg);
1582 auth_len += sizeof(struct sadb_supported);
1583 }
8ff24541 1584
1da177e4
LT		 1585 enc_len = xfrm_count_enc_supported();
1586 if (enc_len) {
1587 enc_len *= sizeof(struct sadb_alg);
1588 enc_len += sizeof(struct sadb_supported);
1589 }
8ff24541 1590
1da177e4
LT		 1591 len = enc_len + auth_len + sizeof(struct sadb_msg);
1592
1593 skb = alloc_skb(len + 16, allocation);
1594 if (!skb)
1595 goto out_put_algs;
1596
1597 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1598 pfkey_hdr_dup(hdr, orig);
1599 hdr->sadb_msg_errno = 0;
1600 hdr->sadb_msg_len = len / sizeof(uint64_t);
1601
1602 if (auth_len) {
1603 struct sadb_supported *sp;
1604 struct sadb_alg *ap;
1605
1606 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1607 ap = (struct sadb_alg *) (sp + 1);
1608
1609 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1610 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1611
1612 for (i = 0; ; i++) {
1613 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1614 if (!aalg)
1615 break;
1616 if (aalg->available)
1617 *ap++ = aalg->desc;
1618 }
1619 }
1620
1621 if (enc_len) {
1622 struct sadb_supported *sp;
1623 struct sadb_alg *ap;
1624
1625 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1626 ap = (struct sadb_alg *) (sp + 1);
1627
1628 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1629 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1630
1631 for (i = 0; ; i++) {
1632 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1633 if (!ealg)
1634 break;
1635 if (ealg->available)
1636 *ap++ = ealg->desc;
1637 }
1638 }
1639
1640out_put_algs:
1641 return skb;
1642}
1643
1644static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1645{
1646 struct pfkey_sock *pfk = pfkey_sk(sk);
1647 struct sk_buff *supp_skb;
1648
1649 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1650 return -EINVAL;
1651
1652 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1653 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1654 return -EEXIST;
1655 pfk->registered |= (1<<hdr->sadb_msg_satype);
1656 }
1657
1658 xfrm_probe_algs();
8ff24541 1659
1da177e4
LT		 1660 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1661 if (!supp_skb) {
1662 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1663 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1664
1665 return -ENOBUFS;
1666 }
1667
07fb0f17 1668 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
1da177e4
LT		 1669
1670 return 0;
1671}
1672
8be987d7
JHS		 1673static int unicast_flush_resp(struct sock *sk, struct sadb_msg *ihdr)
1674{
1675 struct sk_buff *skb;
1676 struct sadb_msg *hdr;
1677
1678 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1679 if (!skb)
1680 return -ENOBUFS;
1681
1682 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1683 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1684 hdr->sadb_msg_errno = (uint8_t) 0;
1685 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1686
1687 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1688}
1689
26b15dad
JHS		 1690static int key_notify_sa_flush(struct km_event *c)
1691{
1692 struct sk_buff *skb;
1693 struct sadb_msg *hdr;
1694
1695 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1696 if (!skb)
1697 return -ENOBUFS;
1698 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1699 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1700 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad
JHS		 1701 hdr->sadb_msg_seq = c->seq;
1702 hdr->sadb_msg_pid = c->pid;
1703 hdr->sadb_msg_version = PF_KEY_V2;
1704 hdr->sadb_msg_errno = (uint8_t) 0;
1705 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1706
07fb0f17 1707 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad
JHS		 1708
1709 return 0;
1710}
1711
1da177e4
LT		 1712static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1713{
07fb0f17 1714 struct net *net = sock_net(sk);
1da177e4 1715 unsigned proto;
26b15dad 1716 struct km_event c;
161a09e7 1717 struct xfrm_audit audit_info;
8be987d7 1718 int err, err2;
1da177e4
LT		 1719
1720 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1721 if (proto == 0)
1722 return -EINVAL;
1723
0c11b942 1724 audit_info.loginuid = audit_get_loginuid(current);
2532386f 1725 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 1726 audit_info.secid = 0;
07fb0f17 1727 err = xfrm_state_flush(net, proto, &audit_info);
8be987d7 1728 err2 = unicast_flush_resp(sk, hdr);
9e64cc95
JHS		 1729 if (err || err2) {
1730 if (err == -ESRCH) /* empty table - go quietly */
1731 err = 0;
8be987d7 1732 return err ? err : err2;
9e64cc95 1733 }
8be987d7 1734
bf08867f 1735 c.data.proto = proto;
26b15dad
JHS		 1736 c.seq = hdr->sadb_msg_seq;
1737 c.pid = hdr->sadb_msg_pid;
f60f6b8f 1738 c.event = XFRM_MSG_FLUSHSA;
07fb0f17 1739 c.net = net;
26b15dad 1740 km_state_notify(NULL, &c);
1da177e4
LT		 1741
1742 return 0;
1743}
1744
1da177e4
LT		 1745static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1746{
83321d6b 1747 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 1748 struct sk_buff *out_skb;
1749 struct sadb_msg *out_hdr;
1750
83321d6b
TT		 1751 if (!pfkey_can_dump(&pfk->sk))
1752 return -ENOBUFS;
1753
050f009e 1754 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1755 if (IS_ERR(out_skb))
1756 return PTR_ERR(out_skb);
1757
1758 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 1759 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 1760 out_hdr->sadb_msg_type = SADB_DUMP;
1761 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1762 out_hdr->sadb_msg_errno = 0;
1763 out_hdr->sadb_msg_reserved = 0;
12a169e7 1764 out_hdr->sadb_msg_seq = count + 1;
83321d6b 1765 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
12a169e7
HX		 1766
1767 if (pfk->dump.skb)
1768 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 1769 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 1770 pfk->dump.skb = out_skb;
1771
1da177e4
LT		 1772 return 0;
1773}
1774
83321d6b
TT		 1775static int pfkey_dump_sa(struct pfkey_sock *pfk)
1776{
07fb0f17
AD		 1777 struct net *net = sock_net(&pfk->sk);
1778 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
83321d6b
TT		 1779}
1780
1781static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1782{
1783 xfrm_state_walk_done(&pfk->dump.u.state);
1784}
1785
1da177e4
LT		 1786static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1787{
1788 u8 proto;
83321d6b
TT		 1789 struct pfkey_sock *pfk = pfkey_sk(sk);
1790
1791 if (pfk->dump.dump != NULL)
1792 return -EBUSY;
1da177e4
LT		 1793
1794 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1795 if (proto == 0)
1796 return -EINVAL;
1797
83321d6b
TT		 1798 pfk->dump.msg_version = hdr->sadb_msg_version;
1799 pfk->dump.msg_pid = hdr->sadb_msg_pid;
1800 pfk->dump.dump = pfkey_dump_sa;
1801 pfk->dump.done = pfkey_dump_sa_done;
1802 xfrm_state_walk_init(&pfk->dump.u.state, proto);
4c563f76 1803
83321d6b 1804 return pfkey_do_dump(pfk);
1da177e4
LT		 1805}
1806
1807static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
1808{
1809 struct pfkey_sock *pfk = pfkey_sk(sk);
1810 int satype = hdr->sadb_msg_satype;
1811
1812 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
1813 /* XXX we mangle packet... */
1814 hdr->sadb_msg_errno = 0;
1815 if (satype != 0 && satype != 1)
1816 return -EINVAL;
1817 pfk->promisc = satype;
1818 }
07fb0f17 1819 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1da177e4
LT		 1820 return 0;
1821}
1822
1823static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1824{
1825 int i;
1826 u32 reqid = *(u32*)ptr;
1827
1828 for (i=0; i<xp->xfrm_nr; i++) {
1829 if (xp->xfrm_vec[i].reqid == reqid)
1830 return -EEXIST;
1831 }
1832 return 0;
1833}
1834
07fb0f17 1835static u32 gen_reqid(struct net *net)
1da177e4 1836{
4c563f76 1837 struct xfrm_policy_walk walk;
1da177e4 1838 u32 start;
4c563f76 1839 int rc;
1da177e4
LT		 1840 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1841
1842 start = reqid;
1843 do {
1844 ++reqid;
1845 if (reqid == 0)
1846 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76 1847 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
07fb0f17 1848 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
4c563f76
TT		 1849 xfrm_policy_walk_done(&walk);
1850 if (rc != -EEXIST)
1da177e4
LT		 1851 return reqid;
1852 } while (reqid != start);
1853 return 0;
1854}
1855
1856static int
1857parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1858{
07fb0f17 1859 struct net *net = xp_net(xp);
1da177e4 1860 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
55569ce2 1861 int mode;
1da177e4
LT		 1862
1863 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1864 return -ELOOP;
1865
1866 if (rq->sadb_x_ipsecrequest_mode == 0)
1867 return -EINVAL;
1868
1869 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1870 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1871 return -EINVAL;
1872 t->mode = mode;
1da177e4
LT		 1873 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1874 t->optional = 1;
1875 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1876 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1877 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1878 t->reqid = 0;
07fb0f17 1879 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1da177e4
LT		 1880 return -ENOBUFS;
1881 }
1882
1883 /* addresses present only in tunnel mode */
7e49e6de 1884 if (t->mode == XFRM_MODE_TUNNEL) {
5f95ac91
YH		 1885 u8 *sa = (u8 *) (rq + 1);
1886 int family, socklen;
1887
1888 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1889 &t->saddr);
1890 if (!family)
1da177e4 1891 return -EINVAL;
5f95ac91
YH		 1892
1893 socklen = pfkey_sockaddr_len(family);
1894 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1895 &t->id.daddr) != family)
1896 return -EINVAL;
1897 t->encap_family = family;
2718aa7c
MK		 1898 } else
1899 t->encap_family = xp->family;
1900
1da177e4 1901 /* No way to set this via kame pfkey */
c5d18e98 1902 t->allalgs = 1;
1da177e4
LT		 1903 xp->xfrm_nr++;
1904 return 0;
1905}
1906
1907static int
1908parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1909{
1910 int err;
1911 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1912 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1913
1914 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1915 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1916 return err;
1917 len -= rq->sadb_x_ipsecrequest_len;
1918 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1919 }
1920 return 0;
1921}
1922
df71837d
TJ		 1923static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
1924{
1925 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1926
1927 if (xfrm_ctx) {
1928 int len = sizeof(struct sadb_x_sec_ctx);
1929 len += xfrm_ctx->ctx_len;
1930 return PFKEY_ALIGN8(len);
1931 }
1932 return 0;
1933}
1934
1da177e4
LT		 1935static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
1936{
2718aa7c 1937 struct xfrm_tmpl *t;
1da177e4 1938 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 1939 int socklen = 0;
1940 int i;
1941
1942 for (i=0; i<xp->xfrm_nr; i++) {
1943 t = xp->xfrm_vec + i;
9e8b4ed8 1944 socklen += pfkey_sockaddr_len(t->encap_family);
2718aa7c 1945 }
1da177e4
LT		 1946
1947 return sizeof(struct sadb_msg) +
1948 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 1949 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 1950 (sockaddr_size * 2) +
1951 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 1952 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1953 (socklen * 2) +
df71837d 1954 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 1955}
1956
1957static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
1958{
1959 struct sk_buff *skb;
1960 int size;
1961
1962 size = pfkey_xfrm_policy2msg_size(xp);
1963
1964 skb = alloc_skb(size + 16, GFP_ATOMIC);
1965 if (skb == NULL)
1966 return ERR_PTR(-ENOBUFS);
1967
1968 return skb;
1969}
1970
55569ce2 1971static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
1da177e4
LT		 1972{
1973 struct sadb_msg *hdr;
1974 struct sadb_address *addr;
1975 struct sadb_lifetime *lifetime;
1976 struct sadb_x_policy *pol;
df71837d
TJ		 1977 struct sadb_x_sec_ctx *sec_ctx;
1978 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 1979 int i;
1980 int size;
1981 int sockaddr_size = pfkey_sockaddr_size(xp->family);
9e8b4ed8 1982 int socklen = pfkey_sockaddr_len(xp->family);
1da177e4
LT		 1983
1984 size = pfkey_xfrm_policy2msg_size(xp);
1985
1986 /* call should fill header later */
1987 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1988 memset(hdr, 0, size); /* XXX do we need this ? */
1989
1990 /* src address */
8ff24541 1991 addr = (struct sadb_address*) skb_put(skb,
1da177e4 1992 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 1993 addr->sadb_address_len =
1da177e4
LT		 1994 (sizeof(struct sadb_address)+sockaddr_size)/
1995 sizeof(uint64_t);
1996 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
1997 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
1998 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
1999 addr->sadb_address_reserved = 0;
e5b56652
YH		 2000 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2001 xp->selector.sport,
2002 (struct sockaddr *) (addr + 1),
2003 xp->family))
1da177e4
LT		 2004 BUG();
2005
2006 /* dst address */
8ff24541 2007 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 2008 sizeof(struct sadb_address)+sockaddr_size);
2009 addr->sadb_address_len =
2010 (sizeof(struct sadb_address)+sockaddr_size)/
2011 sizeof(uint64_t);
2012 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2013 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2014 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4 2015 addr->sadb_address_reserved = 0;
e5b56652
YH		 2016
2017 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2018 (struct sockaddr *) (addr + 1),
2019 xp->family);
1da177e4
LT		 2020
2021 /* hard time */
8ff24541 2022 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2023 sizeof(struct sadb_lifetime));
2024 lifetime->sadb_lifetime_len =
2025 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2026 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2027 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2028 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2029 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2030 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2031 /* soft time */
8ff24541 2032 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2033 sizeof(struct sadb_lifetime));
2034 lifetime->sadb_lifetime_len =
2035 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2036 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2037 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2038 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2039 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2040 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2041 /* current time */
8ff24541 2042 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2043 sizeof(struct sadb_lifetime));
2044 lifetime->sadb_lifetime_len =
2045 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2046 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2047 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2048 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2049 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2050 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2051
2052 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2053 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2054 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2055 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2056 if (xp->action == XFRM_POLICY_ALLOW) {
2057 if (xp->xfrm_nr)
2058 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2059 else
2060 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2061 }
2062 pol->sadb_x_policy_dir = dir+1;
2063 pol->sadb_x_policy_id = xp->index;
2064 pol->sadb_x_policy_priority = xp->priority;
2065
2066 for (i=0; i<xp->xfrm_nr; i++) {
2067 struct sadb_x_ipsecrequest *rq;
2068 struct xfrm_tmpl *t = xp->xfrm_vec + i;
2069 int req_size;
55569ce2 2070 int mode;
1da177e4
LT		 2071
2072 req_size = sizeof(struct sadb_x_ipsecrequest);
e5b56652
YH		 2073 if (t->mode == XFRM_MODE_TUNNEL) {
2074 socklen = pfkey_sockaddr_len(t->encap_family);
2075 req_size += socklen * 2;
2076 } else {
1da177e4 2077 size -= 2*socklen;
e5b56652 2078 }
1da177e4
LT		 2079 rq = (void*)skb_put(skb, req_size);
2080 pol->sadb_x_policy_len += req_size/8;
2081 memset(rq, 0, sizeof(*rq));
2082 rq->sadb_x_ipsecrequest_len = req_size;
2083 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2084 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2085 return -EINVAL;
fefaa75e 2086 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2087 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2088 if (t->reqid)
2089 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2090 if (t->optional)
2091 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2092 rq->sadb_x_ipsecrequest_reqid = t->reqid;
e5b56652 2093
7e49e6de 2094 if (t->mode == XFRM_MODE_TUNNEL) {
e5b56652
YH		 2095 u8 *sa = (void *)(rq + 1);
2096 pfkey_sockaddr_fill(&t->saddr, 0,
2097 (struct sockaddr *)sa,
2098 t->encap_family);
2099 pfkey_sockaddr_fill(&t->id.daddr, 0,
2100 (struct sockaddr *) (sa + socklen),
2101 t->encap_family);
1da177e4
LT		 2102 }
2103 }
df71837d
TJ		 2104
2105 /* security context */
2106 if ((xfrm_ctx = xp->security)) {
2107 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2108
2109 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2110 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2111 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2112 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2113 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2114 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2115 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2116 xfrm_ctx->ctx_len);
2117 }
2118
1da177e4
LT		 2119 hdr->sadb_msg_len = size / sizeof(uint64_t);
2120 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
55569ce2
KM		 2121
2122 return 0;
1da177e4
LT		 2123}
2124
26b15dad
JHS		 2125static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2126{
2127 struct sk_buff *out_skb;
2128 struct sadb_msg *out_hdr;
2129 int err;
2130
2131 out_skb = pfkey_xfrm_policy2msg_prep(xp);
9a127aad
DC		 2132 if (IS_ERR(out_skb))
2133 return PTR_ERR(out_skb);
2134
55569ce2
KM		 2135 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2136 if (err < 0)
2137 return err;
26b15dad
JHS		 2138
2139 out_hdr = (struct sadb_msg *) out_skb->data;
2140 out_hdr->sadb_msg_version = PF_KEY_V2;
2141
f60f6b8f 2142 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2143 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2144 else
2145 out_hdr->sadb_msg_type = event2poltype(c->event);
2146 out_hdr->sadb_msg_errno = 0;
2147 out_hdr->sadb_msg_seq = c->seq;
2148 out_hdr->sadb_msg_pid = c->pid;
07fb0f17 2149 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
26b15dad
JHS		 2150 return 0;
2151
2152}
2153
1da177e4
LT		 2154static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2155{
07fb0f17 2156 struct net *net = sock_net(sk);
df71837d 2157 int err = 0;
1da177e4
LT		 2158 struct sadb_lifetime *lifetime;
2159 struct sadb_address *sa;
2160 struct sadb_x_policy *pol;
2161 struct xfrm_policy *xp;
26b15dad 2162 struct km_event c;
df71837d 2163 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2164
2165 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2166 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2167 !ext_hdrs[SADB_X_EXT_POLICY-1])
2168 return -EINVAL;
2169
2170 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2171 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2172 return -EINVAL;
2173 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2174 return -EINVAL;
2175
07fb0f17 2176 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2177 if (xp == NULL)
2178 return -ENOBUFS;
2179
2180 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2181 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2182 xp->priority = pol->sadb_x_policy_priority;
2183
8ff24541 2184 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2185 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
2186 if (!xp->family) {
2187 err = -EINVAL;
2188 goto out;
2189 }
2190 xp->selector.family = xp->family;
2191 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2192 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2193 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2194 if (xp->selector.sport)
8f83f23e 2195 xp->selector.sport_mask = htons(0xffff);
1da177e4 2196
8ff24541 2197 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2198 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2199 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2200
2201 /* Amusing, we set this twice. KAME apps appear to set same value
2202 * in both addresses.
2203 */
2204 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2205
2206 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2207 if (xp->selector.dport)
8f83f23e 2208 xp->selector.dport_mask = htons(0xffff);
1da177e4 2209
df71837d
TJ		 2210 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
2211 if (sec_ctx != NULL) {
2212 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2213
2214 if (!uctx) {
2215 err = -ENOBUFS;
2216 goto out;
2217 }
2218
03e1ad7b 2219 err = security_xfrm_policy_alloc(&xp->security, uctx);
df71837d
TJ		 2220 kfree(uctx);
2221
2222 if (err)
2223 goto out;
2224 }
2225
1da177e4
LT		 2226 xp->lft.soft_byte_limit = XFRM_INF;
2227 xp->lft.hard_byte_limit = XFRM_INF;
2228 xp->lft.soft_packet_limit = XFRM_INF;
2229 xp->lft.hard_packet_limit = XFRM_INF;
2230 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2231 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2232 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2233 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2234 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2235 }
2236 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2237 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2238 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2239 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2240 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2241 }
2242 xp->xfrm_nr = 0;
2243 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2244 (err = parse_ipsecrequests(xp, pol)) < 0)
2245 goto out;
2246
1da177e4
LT		 2247 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2248 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2249
ab5f5e8b 2250 xfrm_audit_policy_add(xp, err ? 0 : 1,
2532386f
EP		 2251 audit_get_loginuid(current),
2252 audit_get_sessionid(current), 0);
161a09e7 2253
df71837d
TJ		 2254 if (err)
2255 goto out;
1da177e4 2256
26b15dad 2257 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2258 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2259 else
f60f6b8f 2260 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2261
26b15dad
JHS		 2262 c.seq = hdr->sadb_msg_seq;
2263 c.pid = hdr->sadb_msg_pid;
1da177e4 2264
26b15dad
JHS		 2265 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2266 xfrm_pol_put(xp);
1da177e4
LT		 2267 return 0;
2268
2269out:
12a169e7 2270 xp->walk.dead = 1;
64c31b3f 2271 xfrm_policy_destroy(xp);
1da177e4
LT		 2272 return err;
2273}
2274
2275static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2276{
07fb0f17 2277 struct net *net = sock_net(sk);
1da177e4
LT		 2278 int err;
2279 struct sadb_address *sa;
2280 struct sadb_x_policy *pol;
03e1ad7b 2281 struct xfrm_policy *xp;
1da177e4 2282 struct xfrm_selector sel;
26b15dad 2283 struct km_event c;
df71837d 2284 struct sadb_x_sec_ctx *sec_ctx;
2db3e47e 2285 struct xfrm_sec_ctx *pol_ctx = NULL;
1da177e4
LT		 2286
2287 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2288 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2289 !ext_hdrs[SADB_X_EXT_POLICY-1])
2290 return -EINVAL;
2291
2292 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2293 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2294 return -EINVAL;
2295
2296 memset(&sel, 0, sizeof(sel));
2297
8ff24541 2298 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4
LT		 2299 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2300 sel.prefixlen_s = sa->sadb_address_prefixlen;
2301 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2302 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2303 if (sel.sport)
8f83f23e 2304 sel.sport_mask = htons(0xffff);
1da177e4 2305
8ff24541 2306 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 2307 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2308 sel.prefixlen_d = sa->sadb_address_prefixlen;
2309 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2310 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2311 if (sel.dport)
8f83f23e 2312 sel.dport_mask = htons(0xffff);
1da177e4 2313
df71837d 2314 sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
df71837d
TJ		 2315 if (sec_ctx != NULL) {
2316 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2317
2318 if (!uctx)
2319 return -ENOMEM;
2320
03e1ad7b 2321 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
df71837d 2322 kfree(uctx);
df71837d
TJ		 2323 if (err)
2324 return err;
2db3e47e 2325 }
161a09e7 2326
8ca2e93b 2327 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
03e1ad7b
PM		 2328 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2329 1, &err);
2330 security_xfrm_policy_free(pol_ctx);
1da177e4
LT		 2331 if (xp == NULL)
2332 return -ENOENT;
2333
ab5f5e8b 2334 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2335 audit_get_loginuid(current),
2336 audit_get_sessionid(current), 0);
13fcfbb0
DM		 2337
2338 if (err)
c8c05a8e 2339 goto out;
13fcfbb0 2340
26b15dad
JHS		 2341 c.seq = hdr->sadb_msg_seq;
2342 c.pid = hdr->sadb_msg_pid;
1839faab 2343 c.data.byid = 0;
f60f6b8f 2344 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2345 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2346
c8c05a8e 2347out:
26b15dad
JHS		 2348 xfrm_pol_put(xp);
2349 return err;
2350}
2351
2352static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
2353{
2354 int err;
2355 struct sk_buff *out_skb;
2356 struct sadb_msg *out_hdr;
2357 err = 0;
2358
1da177e4
LT		 2359 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2360 if (IS_ERR(out_skb)) {
2361 err = PTR_ERR(out_skb);
2362 goto out;
2363 }
55569ce2
KM		 2364 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2365 if (err < 0)
2366 goto out;
1da177e4
LT		 2367
2368 out_hdr = (struct sadb_msg *) out_skb->data;
2369 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2370 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2371 out_hdr->sadb_msg_satype = 0;
2372 out_hdr->sadb_msg_errno = 0;
2373 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2374 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
07fb0f17 2375 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
1da177e4
LT		 2376 err = 0;
2377
2378out:
1da177e4
LT		 2379 return err;
2380}
2381
08de61be
SS		 2382#ifdef CONFIG_NET_KEY_MIGRATE
2383static int pfkey_sockaddr_pair_size(sa_family_t family)
2384{
9e8b4ed8 2385 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
08de61be
SS		 2386}
2387
13c1d189 2388static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
08de61be
SS		 2389 xfrm_address_t *saddr, xfrm_address_t *daddr,
2390 u16 *family)
2391{
5f95ac91
YH		 2392 int af, socklen;
2393
13c1d189 2394 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
08de61be
SS		 2395 return -EINVAL;
2396
13c1d189 2397 af = pfkey_sockaddr_extract(sa, saddr);
5f95ac91
YH		 2398 if (!af)
2399 return -EINVAL;
2400
2401 socklen = pfkey_sockaddr_len(af);
13c1d189 2402 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
5f95ac91 2403 daddr) != af)
08de61be 2404 return -EINVAL;
08de61be 2405
5f95ac91 2406 *family = af;
08de61be
SS		 2407 return 0;
2408}
2409
2410static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2411 struct xfrm_migrate *m)
2412{
2413 int err;
2414 struct sadb_x_ipsecrequest *rq2;
55569ce2 2415 int mode;
08de61be
SS		 2416
2417 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2418 len < rq1->sadb_x_ipsecrequest_len)
2419 return -EINVAL;
2420
2421 /* old endoints */
13c1d189
AE		 2422 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2423 rq1->sadb_x_ipsecrequest_len,
2424 &m->old_saddr, &m->old_daddr,
08de61be
SS		 2425 &m->old_family);
2426 if (err)
2427 return err;
2428
2429 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2430 len -= rq1->sadb_x_ipsecrequest_len;
2431
2432 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2433 len < rq2->sadb_x_ipsecrequest_len)
2434 return -EINVAL;
2435
2436 /* new endpoints */
13c1d189
AE		 2437 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2438 rq2->sadb_x_ipsecrequest_len,
2439 &m->new_saddr, &m->new_daddr,
08de61be
SS		 2440 &m->new_family);
2441 if (err)
2442 return err;
2443
2444 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2445 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2446 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2447 return -EINVAL;
2448
2449 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2450 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2451 return -EINVAL;
2452 m->mode = mode;
08de61be
SS		 2453 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2454
2455 return ((int)(rq1->sadb_x_ipsecrequest_len +
2456 rq2->sadb_x_ipsecrequest_len));
2457}
2458
2459static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2460 struct sadb_msg *hdr, void **ext_hdrs)
2461{
2462 int i, len, ret, err = -EINVAL;
2463 u8 dir;
2464 struct sadb_address *sa;
13c1d189 2465 struct sadb_x_kmaddress *kma;
08de61be
SS		 2466 struct sadb_x_policy *pol;
2467 struct sadb_x_ipsecrequest *rq;
2468 struct xfrm_selector sel;
2469 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2470 struct xfrm_kmaddress k;
08de61be
SS		 2471
2472 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
13c1d189 2473 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
08de61be
SS		 2474 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2475 err = -EINVAL;
2476 goto out;
2477 }
2478
13c1d189 2479 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
08de61be 2480 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
08de61be
SS		 2481
2482 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2483 err = -EINVAL;
2484 goto out;
2485 }
2486
13c1d189
AE		 2487 if (kma) {
2488 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2489 k.reserved = kma->sadb_x_kmaddress_reserved;
2490 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2491 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2492 &k.local, &k.remote, &k.family);
2493 if (ret < 0) {
2494 err = ret;
2495 goto out;
2496 }
2497 }
2498
08de61be
SS		 2499 dir = pol->sadb_x_policy_dir - 1;
2500 memset(&sel, 0, sizeof(sel));
2501
2502 /* set source address info of selector */
2503 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2504 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2505 sel.prefixlen_s = sa->sadb_address_prefixlen;
2506 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2507 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2508 if (sel.sport)
582ee43d 2509 sel.sport_mask = htons(0xffff);
08de61be
SS		 2510
2511 /* set destination address info of selector */
2512 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2513 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2514 sel.prefixlen_d = sa->sadb_address_prefixlen;
2515 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2516 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2517 if (sel.dport)
582ee43d 2518 sel.dport_mask = htons(0xffff);
08de61be
SS		 2519
2520 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2521
2522 /* extract ipsecrequests */
2523 i = 0;
2524 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2525
2526 while (len > 0 && i < XFRM_MAX_DEPTH) {
2527 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2528 if (ret < 0) {
2529 err = ret;
2530 goto out;
2531 } else {
2532 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2533 len -= ret;
2534 i++;
2535 }
2536 }
2537
2538 if (!i || len > 0) {
2539 err = -EINVAL;
2540 goto out;
2541 }
2542
13c1d189
AE		 2543 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
2544 kma ? &k : NULL);
08de61be
SS		 2545
2546 out:
2547 return err;
2548}
2549#else
2550static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
2551 struct sadb_msg *hdr, void **ext_hdrs)
2552{
2553 return -ENOPROTOOPT;
2554}
2555#endif
2556
2557
1da177e4
LT		 2558static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2559{
07fb0f17 2560 struct net *net = sock_net(sk);
77d8d7a6 2561 unsigned int dir;
215a2dd3 2562 int err = 0, delete;
1da177e4
LT		 2563 struct sadb_x_policy *pol;
2564 struct xfrm_policy *xp;
26b15dad 2565 struct km_event c;
1da177e4
LT		 2566
2567 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2568 return -EINVAL;
2569
77d8d7a6
HX		 2570 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2571 if (dir >= XFRM_POLICY_MAX)
2572 return -EINVAL;
2573
215a2dd3 2574 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
8ca2e93b 2575 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
bd55775c 2576 dir, pol->sadb_x_policy_id, delete, &err);
1da177e4
LT		 2577 if (xp == NULL)
2578 return -ENOENT;
2579
215a2dd3 2580 if (delete) {
ab5f5e8b 2581 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2582 audit_get_loginuid(current),
2583 audit_get_sessionid(current), 0);
1da177e4 2584
215a2dd3
EP		 2585 if (err)
2586 goto out;
2587 c.seq = hdr->sadb_msg_seq;
2588 c.pid = hdr->sadb_msg_pid;
bf08867f 2589 c.data.byid = 1;
f60f6b8f 2590 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2591 km_policy_notify(xp, dir, &c);
26b15dad 2592 } else {
77d8d7a6 2593 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2594 }
1da177e4 2595
215a2dd3 2596out:
1da177e4
LT		 2597 xfrm_pol_put(xp);
2598 return err;
2599}
2600
2601static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2602{
83321d6b 2603 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 2604 struct sk_buff *out_skb;
2605 struct sadb_msg *out_hdr;
55569ce2 2606 int err;
1da177e4 2607
83321d6b
TT		 2608 if (!pfkey_can_dump(&pfk->sk))
2609 return -ENOBUFS;
2610
1da177e4
LT		 2611 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2612 if (IS_ERR(out_skb))
2613 return PTR_ERR(out_skb);
2614
55569ce2
KM		 2615 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2616 if (err < 0)
2617 return err;
1da177e4
LT		 2618
2619 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 2620 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 2621 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2622 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2623 out_hdr->sadb_msg_errno = 0;
12a169e7 2624 out_hdr->sadb_msg_seq = count + 1;
83321d6b 2625 out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
12a169e7
HX		 2626
2627 if (pfk->dump.skb)
2628 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 2629 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 2630 pfk->dump.skb = out_skb;
2631
1da177e4
LT		 2632 return 0;
2633}
2634
83321d6b
TT		 2635static int pfkey_dump_sp(struct pfkey_sock *pfk)
2636{
07fb0f17
AD		 2637 struct net *net = sock_net(&pfk->sk);
2638 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
83321d6b
TT		 2639}
2640
2641static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2642{
2643 xfrm_policy_walk_done(&pfk->dump.u.policy);
2644}
2645
1da177e4
LT		 2646static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2647{
83321d6b 2648 struct pfkey_sock *pfk = pfkey_sk(sk);
4c563f76 2649
83321d6b
TT		 2650 if (pfk->dump.dump != NULL)
2651 return -EBUSY;
1da177e4 2652
83321d6b
TT		 2653 pfk->dump.msg_version = hdr->sadb_msg_version;
2654 pfk->dump.msg_pid = hdr->sadb_msg_pid;
2655 pfk->dump.dump = pfkey_dump_sp;
2656 pfk->dump.done = pfkey_dump_sp_done;
2657 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2658
2659 return pfkey_do_dump(pfk);
1da177e4
LT		 2660}
2661
26b15dad 2662static int key_notify_policy_flush(struct km_event *c)
1da177e4
LT		 2663{
2664 struct sk_buff *skb_out;
26b15dad 2665 struct sadb_msg *hdr;
1da177e4 2666
26b15dad 2667 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2668 if (!skb_out)
2669 return -ENOBUFS;
26b15dad 2670 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2671 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad
JHS		 2672 hdr->sadb_msg_seq = c->seq;
2673 hdr->sadb_msg_pid = c->pid;
2674 hdr->sadb_msg_version = PF_KEY_V2;
2675 hdr->sadb_msg_errno = (uint8_t) 0;
2676 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
07fb0f17 2677 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad 2678 return 0;
1da177e4 2679
26b15dad
JHS		 2680}
2681
2682static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
2683{
07fb0f17 2684 struct net *net = sock_net(sk);
26b15dad 2685 struct km_event c;
161a09e7 2686 struct xfrm_audit audit_info;
8be987d7 2687 int err, err2;
1da177e4 2688
0c11b942 2689 audit_info.loginuid = audit_get_loginuid(current);
2532386f 2690 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 2691 audit_info.secid = 0;
07fb0f17 2692 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
8be987d7 2693 err2 = unicast_flush_resp(sk, hdr);
2f1eb65f
JHS		 2694 if (err || err2) {
2695 if (err == -ESRCH) /* empty table - old silent behavior */
2696 return 0;
2697 return err;
2698 }
8be987d7 2699
f7b6983f 2700 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2701 c.event = XFRM_MSG_FLUSHPOLICY;
26b15dad
JHS		 2702 c.pid = hdr->sadb_msg_pid;
2703 c.seq = hdr->sadb_msg_seq;
07fb0f17 2704 c.net = net;
26b15dad 2705 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2706
2707 return 0;
2708}
2709
2710typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
2711 struct sadb_msg *hdr, void **ext_hdrs);
2712static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
2713 [SADB_RESERVED] = pfkey_reserved,
2714 [SADB_GETSPI] = pfkey_getspi,
2715 [SADB_UPDATE] = pfkey_add,
2716 [SADB_ADD] = pfkey_add,
2717 [SADB_DELETE] = pfkey_delete,
2718 [SADB_GET] = pfkey_get,
2719 [SADB_ACQUIRE] = pfkey_acquire,
2720 [SADB_REGISTER] = pfkey_register,
2721 [SADB_EXPIRE] = NULL,
2722 [SADB_FLUSH] = pfkey_flush,
2723 [SADB_DUMP] = pfkey_dump,
2724 [SADB_X_PROMISC] = pfkey_promisc,
2725 [SADB_X_PCHANGE] = NULL,
2726 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2727 [SADB_X_SPDADD] = pfkey_spdadd,
2728 [SADB_X_SPDDELETE] = pfkey_spddelete,
2729 [SADB_X_SPDGET] = pfkey_spdget,
2730 [SADB_X_SPDACQUIRE] = NULL,
2731 [SADB_X_SPDDUMP] = pfkey_spddump,
2732 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2733 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2734 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2735 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2736};
2737
2738static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
2739{
2740 void *ext_hdrs[SADB_EXT_MAX];
2741 int err;
2742
2743 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
07fb0f17 2744 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
1da177e4
LT		 2745
2746 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2747 err = parse_exthdrs(skb, hdr, ext_hdrs);
2748 if (!err) {
2749 err = -EOPNOTSUPP;
2750 if (pfkey_funcs[hdr->sadb_msg_type])
2751 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2752 }
2753 return err;
2754}
2755
2756static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2757{
2758 struct sadb_msg *hdr = NULL;
2759
2760 if (skb->len < sizeof(*hdr)) {
2761 *errp = -EMSGSIZE;
2762 } else {
2763 hdr = (struct sadb_msg *) skb->data;
2764 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2765 hdr->sadb_msg_reserved != 0 ||
2766 (hdr->sadb_msg_type <= SADB_RESERVED ||
2767 hdr->sadb_msg_type > SADB_MAX)) {
2768 hdr = NULL;
2769 *errp = -EINVAL;
2770 } else if (hdr->sadb_msg_len != (skb->len /
2771 sizeof(uint64_t)) ||
2772 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2773 sizeof(uint64_t))) {
2774 hdr = NULL;
2775 *errp = -EMSGSIZE;
2776 } else {
2777 *errp = 0;
2778 }
2779 }
2780 return hdr;
2781}
2782
2783static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2784{
f398035f
HX		 2785 unsigned int id = d->desc.sadb_alg_id;
2786
2787 if (id >= sizeof(t->aalgos) * 8)
2788 return 0;
2789
2790 return (t->aalgos >> id) & 1;
1da177e4
LT		 2791}
2792
2793static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
2794{
f398035f
HX		 2795 unsigned int id = d->desc.sadb_alg_id;
2796
2797 if (id >= sizeof(t->ealgos) * 8)
2798 return 0;
2799
2800 return (t->ealgos >> id) & 1;
1da177e4
LT		 2801}
2802
2803static int count_ah_combs(struct xfrm_tmpl *t)
2804{
2805 int i, sz = 0;
2806
2807 for (i = 0; ; i++) {
2808 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2809 if (!aalg)
2810 break;
2811 if (aalg_tmpl_set(t, aalg) && aalg->available)
2812 sz += sizeof(struct sadb_comb);
2813 }
2814 return sz + sizeof(struct sadb_prop);
2815}
2816
2817static int count_esp_combs(struct xfrm_tmpl *t)
2818{
2819 int i, k, sz = 0;
2820
2821 for (i = 0; ; i++) {
2822 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2823 if (!ealg)
2824 break;
8ff24541 2825
1da177e4
LT		 2826 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2827 continue;
8ff24541 2828
1da177e4
LT		 2829 for (k = 1; ; k++) {
2830 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2831 if (!aalg)
2832 break;
8ff24541 2833
1da177e4
LT		 2834 if (aalg_tmpl_set(t, aalg) && aalg->available)
2835 sz += sizeof(struct sadb_comb);
2836 }
2837 }
2838 return sz + sizeof(struct sadb_prop);
2839}
2840
2841static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2842{
2843 struct sadb_prop *p;
2844 int i;
2845
2846 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2847 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2848 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2849 p->sadb_prop_replay = 32;
2850 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2851
2852 for (i = 0; ; i++) {
2853 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
2854 if (!aalg)
2855 break;
2856
2857 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2858 struct sadb_comb *c;
2859 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2860 memset(c, 0, sizeof(*c));
2861 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2862 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2863 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2864 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2865 c->sadb_comb_hard_addtime = 24*60*60;
2866 c->sadb_comb_soft_addtime = 20*60*60;
2867 c->sadb_comb_hard_usetime = 8*60*60;
2868 c->sadb_comb_soft_usetime = 7*60*60;
2869 }
2870 }
2871}
2872
2873static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
2874{
2875 struct sadb_prop *p;
2876 int i, k;
2877
2878 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2879 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2880 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2881 p->sadb_prop_replay = 32;
2882 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2883
2884 for (i=0; ; i++) {
2885 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
2886 if (!ealg)
2887 break;
8ff24541 2888
1da177e4
LT		 2889 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2890 continue;
8ff24541 2891
1da177e4
LT		 2892 for (k = 1; ; k++) {
2893 struct sadb_comb *c;
2894 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
2895 if (!aalg)
2896 break;
2897 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2898 continue;
2899 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2900 memset(c, 0, sizeof(*c));
2901 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2902 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2903 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2904 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2905 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2906 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2907 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2908 c->sadb_comb_hard_addtime = 24*60*60;
2909 c->sadb_comb_soft_addtime = 20*60*60;
2910 c->sadb_comb_hard_usetime = 8*60*60;
2911 c->sadb_comb_soft_usetime = 7*60*60;
2912 }
2913 }
2914}
2915
26b15dad
JHS		 2916static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
2917{
2918 return 0;
2919}
2920
2921static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2922{
2923 struct sk_buff *out_skb;
2924 struct sadb_msg *out_hdr;
26b15dad
JHS		 2925 int hard;
2926 int hsc;
2927
bf08867f 2928 hard = c->data.hard;
26b15dad
JHS		 2929 if (hard)
2930 hsc = 2;
2931 else
2932 hsc = 1;
1da177e4 2933
050f009e 2934 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 2935 if (IS_ERR(out_skb))
2936 return PTR_ERR(out_skb);
2937
2938 out_hdr = (struct sadb_msg *) out_skb->data;
2939 out_hdr->sadb_msg_version = PF_KEY_V2;
2940 out_hdr->sadb_msg_type = SADB_EXPIRE;
2941 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2942 out_hdr->sadb_msg_errno = 0;
2943 out_hdr->sadb_msg_reserved = 0;
2944 out_hdr->sadb_msg_seq = 0;
2945 out_hdr->sadb_msg_pid = 0;
2946
07fb0f17 2947 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 2948 return 0;
2949}
2950
26b15dad
JHS		 2951static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
2952{
07fb0f17 2953 struct net *net = x ? xs_net(x) : c->net;
3fa87a32
AD		 2954 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
2955
2956 if (atomic_read(&net_pfkey->socks_nr) == 0)
99c6f60e
JHS		 2957 return 0;
2958
26b15dad 2959 switch (c->event) {
f60f6b8f 2960 case XFRM_MSG_EXPIRE:
26b15dad 2961 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 2962 case XFRM_MSG_DELSA:
2963 case XFRM_MSG_NEWSA:
2964 case XFRM_MSG_UPDSA:
26b15dad 2965 return key_notify_sa(x, c);
f60f6b8f 2966 case XFRM_MSG_FLUSHSA:
26b15dad 2967 return key_notify_sa_flush(c);
d51d081d
JHS		 2968 case XFRM_MSG_NEWAE: /* not yet supported */
2969 break;
26b15dad
JHS		 2970 default:
2971 printk("pfkey: Unknown SA event %d\n", c->event);
2972 break;
2973 }
2974
2975 return 0;
2976}
2977
2978static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2979{
f7b6983f
MN		 2980 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
2981 return 0;
2982
26b15dad 2983 switch (c->event) {
f60f6b8f 2984 case XFRM_MSG_POLEXPIRE:
26b15dad 2985 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 2986 case XFRM_MSG_DELPOLICY:
2987 case XFRM_MSG_NEWPOLICY:
2988 case XFRM_MSG_UPDPOLICY:
26b15dad 2989 return key_notify_policy(xp, dir, c);
f60f6b8f 2990 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 2991 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
2992 break;
26b15dad
JHS		 2993 return key_notify_policy_flush(c);
2994 default:
2995 printk("pfkey: Unknown policy event %d\n", c->event);
2996 break;
2997 }
2998
2999 return 0;
3000}
3001
1da177e4
LT		 3002static u32 get_acqseq(void)
3003{
3004 u32 res;
28aecb9d 3005 static atomic_t acqseq;
1da177e4 3006
28aecb9d
ED		 3007 do {
3008 res = atomic_inc_return(&acqseq);
3009 } while (!res);
1da177e4
LT		 3010 return res;
3011}
3012
3013static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
3014{
3015 struct sk_buff *skb;
3016 struct sadb_msg *hdr;
3017 struct sadb_address *addr;
3018 struct sadb_x_policy *pol;
1da177e4
LT		 3019 int sockaddr_size;
3020 int size;
4e2ba18e
VY		 3021 struct sadb_x_sec_ctx *sec_ctx;
3022 struct xfrm_sec_ctx *xfrm_ctx;
3023 int ctx_size = 0;
8ff24541 3024
1da177e4
LT		 3025 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3026 if (!sockaddr_size)
3027 return -EINVAL;
3028
3029 size = sizeof(struct sadb_msg) +
3030 (sizeof(struct sadb_address) * 2) +
3031 (sockaddr_size * 2) +
3032 sizeof(struct sadb_x_policy);
8ff24541 3033
1da177e4
LT		 3034 if (x->id.proto == IPPROTO_AH)
3035 size += count_ah_combs(t);
3036 else if (x->id.proto == IPPROTO_ESP)
3037 size += count_esp_combs(t);
3038
4e2ba18e
VY		 3039 if ((xfrm_ctx = x->security)) {
3040 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3041 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3042 }
3043
1da177e4
LT		 3044 skb = alloc_skb(size + 16, GFP_ATOMIC);
3045 if (skb == NULL)
3046 return -ENOMEM;
8ff24541 3047
1da177e4
LT		 3048 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3049 hdr->sadb_msg_version = PF_KEY_V2;
3050 hdr->sadb_msg_type = SADB_ACQUIRE;
3051 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3052 hdr->sadb_msg_len = size / sizeof(uint64_t);
3053 hdr->sadb_msg_errno = 0;
3054 hdr->sadb_msg_reserved = 0;
3055 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3056 hdr->sadb_msg_pid = 0;
3057
3058 /* src address */
8ff24541 3059 addr = (struct sadb_address*) skb_put(skb,
1da177e4 3060 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3061 addr->sadb_address_len =
1da177e4
LT		 3062 (sizeof(struct sadb_address)+sockaddr_size)/
3063 sizeof(uint64_t);
3064 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3065 addr->sadb_address_proto = 0;
3066 addr->sadb_address_reserved = 0;
e5b56652
YH		 3067 addr->sadb_address_prefixlen =
3068 pfkey_sockaddr_fill(&x->props.saddr, 0,
3069 (struct sockaddr *) (addr + 1),
3070 x->props.family);
3071 if (!addr->sadb_address_prefixlen)
1da177e4 3072 BUG();
8ff24541 3073
1da177e4 3074 /* dst address */
8ff24541 3075 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 3076 sizeof(struct sadb_address)+sockaddr_size);
3077 addr->sadb_address_len =
3078 (sizeof(struct sadb_address)+sockaddr_size)/
3079 sizeof(uint64_t);
3080 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3081 addr->sadb_address_proto = 0;
3082 addr->sadb_address_reserved = 0;
e5b56652
YH		 3083 addr->sadb_address_prefixlen =
3084 pfkey_sockaddr_fill(&x->id.daddr, 0,
3085 (struct sockaddr *) (addr + 1),
3086 x->props.family);
3087 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3088 BUG();
3089
3090 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3091 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3092 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3093 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3094 pol->sadb_x_policy_dir = dir+1;
3095 pol->sadb_x_policy_id = xp->index;
3096
3097 /* Set sadb_comb's. */
3098 if (x->id.proto == IPPROTO_AH)
3099 dump_ah_combs(skb, t);
3100 else if (x->id.proto == IPPROTO_ESP)
3101 dump_esp_combs(skb, t);
3102
4e2ba18e
VY		 3103 /* security context */
3104 if (xfrm_ctx) {
3105 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3106 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3107 sec_ctx->sadb_x_sec_len =
3108 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3109 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3110 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3111 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3112 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3113 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3114 xfrm_ctx->ctx_len);
3115 }
3116
07fb0f17 3117 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3118}
3119
cb969f07 3120static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3121 u8 *data, int len, int *dir)
1da177e4 3122{
07fb0f17 3123 struct net *net = sock_net(sk);
1da177e4
LT		 3124 struct xfrm_policy *xp;
3125 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3126 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3127
cb969f07 3128 switch (sk->sk_family) {
1da177e4
LT		 3129 case AF_INET:
3130 if (opt != IP_IPSEC_POLICY) {
3131 *dir = -EOPNOTSUPP;
3132 return NULL;
3133 }
3134 break;
3135#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
3136 case AF_INET6:
3137 if (opt != IPV6_IPSEC_POLICY) {
3138 *dir = -EOPNOTSUPP;
3139 return NULL;
3140 }
3141 break;
3142#endif
3143 default:
3144 *dir = -EINVAL;
3145 return NULL;
3146 }
3147
3148 *dir = -EINVAL;
3149
3150 if (len < sizeof(struct sadb_x_policy) ||
3151 pol->sadb_x_policy_len*8 > len ||
3152 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3153 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3154 return NULL;
3155
07fb0f17 3156 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3157 if (xp == NULL) {
3158 *dir = -ENOBUFS;
3159 return NULL;
3160 }
3161
3162 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3163 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3164
3165 xp->lft.soft_byte_limit = XFRM_INF;
3166 xp->lft.hard_byte_limit = XFRM_INF;
3167 xp->lft.soft_packet_limit = XFRM_INF;
3168 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3169 xp->family = sk->sk_family;
1da177e4
LT		 3170
3171 xp->xfrm_nr = 0;
3172 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3173 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3174 goto out;
3175
df71837d
TJ		 3176 /* security context too */
3177 if (len >= (pol->sadb_x_policy_len*8 +
3178 sizeof(struct sadb_x_sec_ctx))) {
3179 char *p = (char *)pol;
3180 struct xfrm_user_sec_ctx *uctx;
3181
3182 p += pol->sadb_x_policy_len*8;
3183 sec_ctx = (struct sadb_x_sec_ctx *)p;
3184 if (len < pol->sadb_x_policy_len*8 +
cb969f07
VY		 3185 sec_ctx->sadb_x_sec_len) {
3186 *dir = -EINVAL;
df71837d 3187 goto out;
cb969f07 3188 }
df71837d
TJ		 3189 if ((*dir = verify_sec_ctx_len(p)))
3190 goto out;
3191 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
03e1ad7b 3192 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
df71837d
TJ		 3193 kfree(uctx);
3194
3195 if (*dir)
3196 goto out;
3197 }
3198
1da177e4
LT		 3199 *dir = pol->sadb_x_policy_dir-1;
3200 return xp;
3201
3202out:
70e90679 3203 xp->walk.dead = 1;
64c31b3f 3204 xfrm_policy_destroy(xp);
1da177e4
LT		 3205 return NULL;
3206}
3207
5d36b180 3208static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3209{
3210 struct sk_buff *skb;
3211 struct sadb_msg *hdr;
3212 struct sadb_sa *sa;
3213 struct sadb_address *addr;
3214 struct sadb_x_nat_t_port *n_port;
1da177e4
LT		 3215 int sockaddr_size;
3216 int size;
3217 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3218 struct xfrm_encap_tmpl *natt = NULL;
3219
3220 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3221 if (!sockaddr_size)
3222 return -EINVAL;
3223
3224 if (!satype)
3225 return -EINVAL;
3226
3227 if (!x->encap)
3228 return -EINVAL;
3229
3230 natt = x->encap;
3231
3232 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3233 *
3234 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3235 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3236 */
8ff24541 3237
1da177e4
LT		 3238 size = sizeof(struct sadb_msg) +
3239 sizeof(struct sadb_sa) +
3240 (sizeof(struct sadb_address) * 2) +
3241 (sockaddr_size * 2) +
3242 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3243
1da177e4
LT		 3244 skb = alloc_skb(size + 16, GFP_ATOMIC);
3245 if (skb == NULL)
3246 return -ENOMEM;
8ff24541 3247
1da177e4
LT		 3248 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3249 hdr->sadb_msg_version = PF_KEY_V2;
3250 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3251 hdr->sadb_msg_satype = satype;
3252 hdr->sadb_msg_len = size / sizeof(uint64_t);
3253 hdr->sadb_msg_errno = 0;
3254 hdr->sadb_msg_reserved = 0;
3255 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3256 hdr->sadb_msg_pid = 0;
3257
3258 /* SA */
3259 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3260 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3261 sa->sadb_sa_exttype = SADB_EXT_SA;
3262 sa->sadb_sa_spi = x->id.spi;
3263 sa->sadb_sa_replay = 0;
3264 sa->sadb_sa_state = 0;
3265 sa->sadb_sa_auth = 0;
3266 sa->sadb_sa_encrypt = 0;
3267 sa->sadb_sa_flags = 0;
3268
3269 /* ADDRESS_SRC (old addr) */
3270 addr = (struct sadb_address*)
3271 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3272 addr->sadb_address_len =
1da177e4
LT		 3273 (sizeof(struct sadb_address)+sockaddr_size)/
3274 sizeof(uint64_t);
3275 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3276 addr->sadb_address_proto = 0;
3277 addr->sadb_address_reserved = 0;
e5b56652
YH		 3278 addr->sadb_address_prefixlen =
3279 pfkey_sockaddr_fill(&x->props.saddr, 0,
3280 (struct sockaddr *) (addr + 1),
3281 x->props.family);
3282 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3283 BUG();
3284
3285 /* NAT_T_SPORT (old port) */
3286 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3287 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3288 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3289 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3290 n_port->sadb_x_nat_t_port_reserved = 0;
3291
3292 /* ADDRESS_DST (new addr) */
3293 addr = (struct sadb_address*)
3294 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3295 addr->sadb_address_len =
1da177e4
LT		 3296 (sizeof(struct sadb_address)+sockaddr_size)/
3297 sizeof(uint64_t);
3298 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3299 addr->sadb_address_proto = 0;
3300 addr->sadb_address_reserved = 0;
e5b56652
YH		 3301 addr->sadb_address_prefixlen =
3302 pfkey_sockaddr_fill(ipaddr, 0,
3303 (struct sockaddr *) (addr + 1),
3304 x->props.family);
3305 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3306 BUG();
3307
3308 /* NAT_T_DPORT (new port) */
3309 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3310 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3311 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3312 n_port->sadb_x_nat_t_port_port = sport;
3313 n_port->sadb_x_nat_t_port_reserved = 0;
3314
07fb0f17 3315 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3316}
3317
08de61be
SS		 3318#ifdef CONFIG_NET_KEY_MIGRATE
3319static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
3320 struct xfrm_selector *sel)
3321{
3322 struct sadb_address *addr;
08de61be
SS		 3323 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3324 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3325 addr->sadb_address_exttype = type;
3326 addr->sadb_address_proto = sel->proto;
3327 addr->sadb_address_reserved = 0;
3328
3329 switch (type) {
3330 case SADB_EXT_ADDRESS_SRC:
e5b56652
YH		 3331 addr->sadb_address_prefixlen = sel->prefixlen_s;
3332 pfkey_sockaddr_fill(&sel->saddr, 0,
3333 (struct sockaddr *)(addr + 1),
3334 sel->family);
08de61be
SS		 3335 break;
3336 case SADB_EXT_ADDRESS_DST:
e5b56652
YH		 3337 addr->sadb_address_prefixlen = sel->prefixlen_d;
3338 pfkey_sockaddr_fill(&sel->daddr, 0,
3339 (struct sockaddr *)(addr + 1),
3340 sel->family);
08de61be
SS		 3341 break;
3342 default:
3343 return -EINVAL;
3344 }
3345
3346 return 0;
3347}
3348
13c1d189
AE		 3349
3350static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k)
3351{
3352 struct sadb_x_kmaddress *kma;
3353 u8 *sa;
3354 int family = k->family;
3355 int socklen = pfkey_sockaddr_len(family);
3356 int size_req;
3357
3358 size_req = (sizeof(struct sadb_x_kmaddress) +
3359 pfkey_sockaddr_pair_size(family));
3360
3361 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3362 memset(kma, 0, size_req);
3363 kma->sadb_x_kmaddress_len = size_req / 8;
3364 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3365 kma->sadb_x_kmaddress_reserved = k->reserved;
3366
3367 sa = (u8 *)(kma + 1);
3368 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3369 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3370 return -EINVAL;
3371
3372 return 0;
3373}
3374
08de61be
SS		 3375static int set_ipsecrequest(struct sk_buff *skb,
3376 uint8_t proto, uint8_t mode, int level,
3377 uint32_t reqid, uint8_t family,
3378 xfrm_address_t *src, xfrm_address_t *dst)
3379{
3380 struct sadb_x_ipsecrequest *rq;
e5b56652
YH		 3381 u8 *sa;
3382 int socklen = pfkey_sockaddr_len(family);
08de61be
SS		 3383 int size_req;
3384
3385 size_req = sizeof(struct sadb_x_ipsecrequest) +
3386 pfkey_sockaddr_pair_size(family);
3387
3388 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3389 memset(rq, 0, size_req);
3390 rq->sadb_x_ipsecrequest_len = size_req;
3391 rq->sadb_x_ipsecrequest_proto = proto;
3392 rq->sadb_x_ipsecrequest_mode = mode;
3393 rq->sadb_x_ipsecrequest_level = level;
3394 rq->sadb_x_ipsecrequest_reqid = reqid;
3395
e5b56652
YH		 3396 sa = (u8 *) (rq + 1);
3397 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3398 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
08de61be 3399 return -EINVAL;
08de61be
SS		 3400
3401 return 0;
3402}
3403#endif
3404
3405#ifdef CONFIG_NET_KEY_MIGRATE
3406static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 3407 struct xfrm_migrate *m, int num_bundles,
3408 struct xfrm_kmaddress *k)
08de61be
SS		 3409{
3410 int i;
3411 int sasize_sel;
3412 int size = 0;
3413 int size_pol = 0;
3414 struct sk_buff *skb;
3415 struct sadb_msg *hdr;
3416 struct sadb_x_policy *pol;
3417 struct xfrm_migrate *mp;
3418
3419 if (type != XFRM_POLICY_TYPE_MAIN)
3420 return 0;
3421
3422 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3423 return -EINVAL;
3424
13c1d189
AE		 3425 if (k != NULL) {
3426 /* addresses for KM */
3427 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3428 pfkey_sockaddr_pair_size(k->family));
3429 }
3430
08de61be
SS		 3431 /* selector */
3432 sasize_sel = pfkey_sockaddr_size(sel->family);
3433 if (!sasize_sel)
3434 return -EINVAL;
3435 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3436
3437 /* policy info */
3438 size_pol += sizeof(struct sadb_x_policy);
3439
3440 /* ipsecrequests */
3441 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3442 /* old locator pair */
3443 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3444 pfkey_sockaddr_pair_size(mp->old_family);
3445 /* new locator pair */
3446 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3447 pfkey_sockaddr_pair_size(mp->new_family);
3448 }
3449
3450 size += sizeof(struct sadb_msg) + size_pol;
3451
3452 /* alloc buffer */
3453 skb = alloc_skb(size, GFP_ATOMIC);
3454 if (skb == NULL)
3455 return -ENOMEM;
3456
3457 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3458 hdr->sadb_msg_version = PF_KEY_V2;
3459 hdr->sadb_msg_type = SADB_X_MIGRATE;
3460 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3461 hdr->sadb_msg_len = size / 8;
3462 hdr->sadb_msg_errno = 0;
3463 hdr->sadb_msg_reserved = 0;
3464 hdr->sadb_msg_seq = 0;
3465 hdr->sadb_msg_pid = 0;
3466
13c1d189
AE		 3467 /* Addresses to be used by KM for negotiation, if ext is available */
3468 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
3469 return -EINVAL;
3470
08de61be
SS		 3471 /* selector src */
3472 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3473
3474 /* selector dst */
3475 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3476
3477 /* policy information */
3478 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3479 pol->sadb_x_policy_len = size_pol / 8;
3480 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3481 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3482 pol->sadb_x_policy_dir = dir + 1;
3483 pol->sadb_x_policy_id = 0;
3484 pol->sadb_x_policy_priority = 0;
3485
3486 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3487 /* old ipsecrequest */
55569ce2
KM		 3488 int mode = pfkey_mode_from_xfrm(mp->mode);
3489 if (mode < 0)
d4782c32 3490 goto err;
55569ce2 3491 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3492 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3493 mp->reqid, mp->old_family,
d4782c32
PM		 3494 &mp->old_saddr, &mp->old_daddr) < 0)
3495 goto err;
08de61be
SS		 3496
3497 /* new ipsecrequest */
55569ce2 3498 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3499 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3500 mp->reqid, mp->new_family,
d4782c32
PM		 3501 &mp->new_saddr, &mp->new_daddr) < 0)
3502 goto err;
08de61be
SS		 3503 }
3504
3505 /* broadcast migrate message to sockets */
07fb0f17 3506 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
08de61be
SS		 3507
3508 return 0;
d4782c32
PM		 3509
3510err:
3511 kfree_skb(skb);
3512 return -EINVAL;
08de61be
SS		 3513}
3514#else
3515static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 3516 struct xfrm_migrate *m, int num_bundles,
3517 struct xfrm_kmaddress *k)
08de61be
SS		 3518{
3519 return -ENOPROTOOPT;
3520}
3521#endif
3522
1da177e4
LT		 3523static int pfkey_sendmsg(struct kiocb *kiocb,
3524 struct socket *sock, struct msghdr *msg, size_t len)
3525{
3526 struct sock *sk = sock->sk;
3527 struct sk_buff *skb = NULL;
3528 struct sadb_msg *hdr = NULL;
3529 int err;
3530
3531 err = -EOPNOTSUPP;
3532 if (msg->msg_flags & MSG_OOB)
3533 goto out;
3534
3535 err = -EMSGSIZE;
3536 if ((unsigned)len > sk->sk_sndbuf - 32)
3537 goto out;
3538
3539 err = -ENOBUFS;
3540 skb = alloc_skb(len, GFP_KERNEL);
3541 if (skb == NULL)
3542 goto out;
3543
3544 err = -EFAULT;
3545 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3546 goto out;
3547
3548 hdr = pfkey_get_base_msg(skb, &err);
3549 if (!hdr)
3550 goto out;
3551
4a3e2f71 3552 mutex_lock(&xfrm_cfg_mutex);
1da177e4 3553 err = pfkey_process(sk, skb, hdr);
4a3e2f71 3554 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 3555
3556out:
3557 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3558 err = 0;
6f961068 3559 kfree_skb(skb);
1da177e4
LT		 3560
3561 return err ? : len;
3562}
3563
3564static int pfkey_recvmsg(struct kiocb *kiocb,
3565 struct socket *sock, struct msghdr *msg, size_t len,
3566 int flags)
3567{
3568 struct sock *sk = sock->sk;
83321d6b 3569 struct pfkey_sock *pfk = pfkey_sk(sk);
1da177e4
LT		 3570 struct sk_buff *skb;
3571 int copied, err;
3572
3573 err = -EINVAL;
3574 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3575 goto out;
3576
3577 msg->msg_namelen = 0;
3578 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3579 if (skb == NULL)
3580 goto out;
3581
3582 copied = skb->len;
3583 if (copied > len) {
3584 msg->msg_flags |= MSG_TRUNC;
3585 copied = len;
3586 }
3587
badff6d0 3588 skb_reset_transport_header(skb);
1da177e4
LT		 3589 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3590 if (err)
3591 goto out_free;
3592
3b885787 3593 sock_recv_ts_and_drops(msg, sk, skb);
1da177e4
LT		 3594
3595 err = (flags & MSG_TRUNC) ? skb->len : copied;
3596
83321d6b
TT		 3597 if (pfk->dump.dump != NULL &&
3598 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3599 pfkey_do_dump(pfk);
3600
1da177e4
LT		 3601out_free:
3602 skb_free_datagram(sk, skb);
3603out:
3604 return err;
3605}
3606
90ddc4f0 3607static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3608 .family = PF_KEY,
3609 .owner = THIS_MODULE,
3610 /* Operations that make no sense on pfkey sockets. */
3611 .bind = sock_no_bind,
3612 .connect = sock_no_connect,
3613 .socketpair = sock_no_socketpair,
3614 .accept = sock_no_accept,
3615 .getname = sock_no_getname,
3616 .ioctl = sock_no_ioctl,
3617 .listen = sock_no_listen,
3618 .shutdown = sock_no_shutdown,
3619 .setsockopt = sock_no_setsockopt,
3620 .getsockopt = sock_no_getsockopt,
3621 .mmap = sock_no_mmap,
3622 .sendpage = sock_no_sendpage,
3623
3624 /* Now the operations that really occur. */
3625 .release = pfkey_release,
3626 .poll = datagram_poll,
3627 .sendmsg = pfkey_sendmsg,
3628 .recvmsg = pfkey_recvmsg,
3629};
3630
ec1b4cf7 3631static const struct net_proto_family pfkey_family_ops = {
1da177e4
LT		 3632 .family = PF_KEY,
3633 .create = pfkey_create,
3634 .owner = THIS_MODULE,
3635};
3636
3637#ifdef CONFIG_PROC_FS
bd2f7476 3638static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3639{
27b5b865 3640 struct sock *s = sk_entry(v);
1da177e4 3641
bd2f7476
PE		 3642 if (v == SEQ_START_TOKEN)
3643 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3644 else
3645 seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4
LT		 3646 s,
3647 atomic_read(&s->sk_refcnt),
31e6d363
ED		 3648 sk_rmem_alloc_get(s),
3649 sk_wmem_alloc_get(s),
1da177e4
LT		 3650 sock_i_uid(s),
3651 sock_i_ino(s)
3652 );
bd2f7476
PE		 3653 return 0;
3654}
3655
3656static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
3657{
7013ec30 3658 struct net *net = seq_file_net(f);
3fa87a32 3659 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 3660
7f6b9dbd 3661 rcu_read_lock();
3662 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
bd2f7476
PE		 3663}
3664
3665static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3666{
7013ec30 3667 struct net *net = seq_file_net(f);
3fa87a32
AD		 3668 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3669
7f6b9dbd 3670 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
bd2f7476 3671}
1da177e4 3672
bd2f7476
PE		 3673static void pfkey_seq_stop(struct seq_file *f, void *v)
3674{
7f6b9dbd 3675 rcu_read_unlock();
bd2f7476 3676}
1da177e4 3677
98147d52 3678static const struct seq_operations pfkey_seq_ops = {
bd2f7476
PE		 3679 .start = pfkey_seq_start,
3680 .next = pfkey_seq_next,
3681 .stop = pfkey_seq_stop,
3682 .show = pfkey_seq_show,
3683};
1da177e4 3684
bd2f7476
PE		 3685static int pfkey_seq_open(struct inode *inode, struct file *file)
3686{
7013ec30
AD		 3687 return seq_open_net(inode, file, &pfkey_seq_ops,
3688 sizeof(struct seq_net_private));
1da177e4 3689}
61145aa1 3690
5ca1b998 3691static const struct file_operations pfkey_proc_ops = {
bd2f7476
PE		 3692 .open = pfkey_seq_open,
3693 .read = seq_read,
3694 .llseek = seq_lseek,
7013ec30 3695 .release = seq_release_net,
bd2f7476
PE		 3696};
3697
7013ec30 3698static int __net_init pfkey_init_proc(struct net *net)
61145aa1 3699{
bd2f7476
PE		 3700 struct proc_dir_entry *e;
3701
7013ec30 3702 e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
bd2f7476 3703 if (e == NULL)
61145aa1 3704 return -ENOMEM;
bd2f7476 3705
bd2f7476 3706 return 0;
61145aa1
PE		 3707}
3708
2c8c1e72 3709static void __net_exit pfkey_exit_proc(struct net *net)
61145aa1 3710{
7013ec30 3711 proc_net_remove(net, "pfkey");
61145aa1
PE		 3712}
3713#else
2c8c1e72 3714static inline int pfkey_init_proc(struct net *net)
61145aa1
PE		 3715{
3716 return 0;
3717}
3718
2c8c1e72 3719static inline void pfkey_exit_proc(struct net *net)
61145aa1
PE		 3720{
3721}
1da177e4
LT		 3722#endif
3723
3724static struct xfrm_mgr pfkeyv2_mgr =
3725{
3726 .id = "pfkeyv2",
3727 .notify = pfkey_send_notify,
3728 .acquire = pfkey_send_acquire,
3729 .compile_policy = pfkey_compile_policy,
3730 .new_mapping = pfkey_send_new_mapping,
26b15dad 3731 .notify_policy = pfkey_send_policy_notify,
08de61be 3732 .migrate = pfkey_send_migrate,
1da177e4
LT		 3733};
3734
3fa87a32
AD		 3735static int __net_init pfkey_net_init(struct net *net)
3736{
23c049ca 3737 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3fa87a32
AD		 3738 int rv;
3739
3fa87a32
AD		 3740 INIT_HLIST_HEAD(&net_pfkey->table);
3741 atomic_set(&net_pfkey->socks_nr, 0);
23c049ca 3742
7013ec30 3743 rv = pfkey_init_proc(net);
3fa87a32 3744
3fa87a32
AD		 3745 return rv;
3746}
3747
3748static void __net_exit pfkey_net_exit(struct net *net)
3749{
3750 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3751
7013ec30 3752 pfkey_exit_proc(net);
3fa87a32 3753 BUG_ON(!hlist_empty(&net_pfkey->table));
3fa87a32
AD		 3754}
3755
3756static struct pernet_operations pfkey_net_ops = {
3757 .init = pfkey_net_init,
3758 .exit = pfkey_net_exit,
23c049ca
EB		 3759 .id = &pfkey_net_id,
3760 .size = sizeof(struct netns_pfkey),
3fa87a32
AD		 3761};
3762
1da177e4
LT		 3763static void __exit ipsec_pfkey_exit(void)
3764{
3765 xfrm_unregister_km(&pfkeyv2_mgr);
1da177e4 3766 sock_unregister(PF_KEY);
180211b8 3767 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3768 proto_unregister(&key_proto);
3769}
3770
3771static int __init ipsec_pfkey_init(void)
3772{
3773 int err = proto_register(&key_proto, 0);
3774
3775 if (err != 0)
3776 goto out;
3777
180211b8 3778 err = register_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3779 if (err != 0)
3780 goto out_unregister_key_proto;
180211b8
AD		 3781 err = sock_register(&pfkey_family_ops);
3782 if (err != 0)
3783 goto out_unregister_pernet;
1da177e4
LT		 3784 err = xfrm_register_km(&pfkeyv2_mgr);
3785 if (err != 0)
7013ec30 3786 goto out_sock_unregister;
1da177e4
LT		 3787out:
3788 return err;
180211b8 3789
1da177e4 3790out_sock_unregister:
1da177e4 3791 sock_unregister(PF_KEY);
180211b8
AD		 3792out_unregister_pernet:
3793 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3794out_unregister_key_proto:
3795 proto_unregister(&key_proto);
3796 goto out;
3797}
3798
3799module_init(ipsec_pfkey_init);
3800module_exit(ipsec_pfkey_exit);
3801MODULE_LICENSE("GPL");
3802MODULE_ALIAS_NETPROTO(PF_KEY);
Linux kernel - Deliverables
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