]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - net/key/af_key.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
selinux: add gfp argument to security_xfrm_policy_alloc and fix callers
[mirror_ubuntu-zesty-kernel.git] / net / key / af_key.c
CommitLineData
1da177e4
LT		 1/*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
4fc268d2 17#include <linux/capability.h>
1da177e4
LT		 18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/socket.h>
21#include <linux/pfkeyv2.h>
22#include <linux/ipsec.h>
23#include <linux/skbuff.h>
24#include <linux/rtnetlink.h>
25#include <linux/in.h>
26#include <linux/in6.h>
27#include <linux/proc_fs.h>
28#include <linux/init.h>
5a0e3ad6 29#include <linux/slab.h>
457c4cbc 30#include <net/net_namespace.h>
3fa87a32 31#include <net/netns/generic.h>
1da177e4
LT		 32#include <net/xfrm.h>
33
34#include <net/sock.h>
35
36#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
38
f99189b1 39static int pfkey_net_id __read_mostly;
3fa87a32
AD		 40struct netns_pfkey {
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
43 atomic_t socks_nr;
44};
7f6b9dbd 45static DEFINE_MUTEX(pfkey_mutex);
1da177e4 46
bd55775c 47#define DUMMY_MARK 0
e473fcb4 48static const struct xfrm_mark dummy_mark = {0, 0};
1da177e4
LT		 49struct pfkey_sock {
50 /* struct sock must be the first member of struct pfkey_sock */
51 struct sock sk;
52 int registered;
53 int promisc;
83321d6b
TT		 54
55 struct {
56 uint8_t msg_version;
15e47304 57 uint32_t msg_portid;
83321d6b
TT		 58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
60 union {
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
63 } u;
12a169e7 64 struct sk_buff *skb;
83321d6b 65 } dump;
1da177e4
LT		 66};
67
68static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
69{
70 return (struct pfkey_sock *)sk;
71}
72
4c93fbb0 73static int pfkey_can_dump(const struct sock *sk)
83321d6b
TT		 74{
75 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
76 return 1;
77 return 0;
78}
79
05238204 80static void pfkey_terminate_dump(struct pfkey_sock *pfk)
83321d6b 81{
05238204 82 if (pfk->dump.dump) {
12a169e7
HX		 83 if (pfk->dump.skb) {
84 kfree_skb(pfk->dump.skb);
85 pfk->dump.skb = NULL;
86 }
05238204
TT		 87 pfk->dump.done(pfk);
88 pfk->dump.dump = NULL;
89 pfk->dump.done = NULL;
90 }
83321d6b
TT		 91}
92
1da177e4
LT		 93static void pfkey_sock_destruct(struct sock *sk)
94{
3fa87a32
AD		 95 struct net *net = sock_net(sk);
96 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
97
05238204 98 pfkey_terminate_dump(pfkey_sk(sk));
1da177e4
LT		 99 skb_queue_purge(&sk->sk_receive_queue);
100
101 if (!sock_flag(sk, SOCK_DEAD)) {
207024b9 102 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
1da177e4
LT		 103 return;
104 }
105
547b792c
IJ		 106 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
107 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
1da177e4 108
3fa87a32 109 atomic_dec(&net_pfkey->socks_nr);
1da177e4
LT		 110}
111
90ddc4f0 112static const struct proto_ops pfkey_ops;
1da177e4
LT		 113
114static void pfkey_insert(struct sock *sk)
115{
3fa87a32
AD		 116 struct net *net = sock_net(sk);
117 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
118
7f6b9dbd 119 mutex_lock(&pfkey_mutex);
120 sk_add_node_rcu(sk, &net_pfkey->table);
121 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 122}
123
124static void pfkey_remove(struct sock *sk)
125{
7f6b9dbd 126 mutex_lock(&pfkey_mutex);
127 sk_del_node_init_rcu(sk);
128 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 129}
130
131static struct proto key_proto = {
132 .name = "KEY",
133 .owner = THIS_MODULE,
134 .obj_size = sizeof(struct pfkey_sock),
135};
136
3f378b68
EP		 137static int pfkey_create(struct net *net, struct socket *sock, int protocol,
138 int kern)
1da177e4 139{
3fa87a32 140 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4
LT		 141 struct sock *sk;
142 int err;
143
df008c91 144 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 145 return -EPERM;
146 if (sock->type != SOCK_RAW)
147 return -ESOCKTNOSUPPORT;
148 if (protocol != PF_KEY_V2)
149 return -EPROTONOSUPPORT;
150
151 err = -ENOMEM;
6257ff21 152 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
1da177e4
LT		 153 if (sk == NULL)
154 goto out;
8ff24541 155
1da177e4
LT		 156 sock->ops = &pfkey_ops;
157 sock_init_data(sock, sk);
158
159 sk->sk_family = PF_KEY;
160 sk->sk_destruct = pfkey_sock_destruct;
161
3fa87a32 162 atomic_inc(&net_pfkey->socks_nr);
1da177e4
LT		 163
164 pfkey_insert(sk);
165
166 return 0;
167out:
168 return err;
169}
170
171static int pfkey_release(struct socket *sock)
172{
173 struct sock *sk = sock->sk;
174
175 if (!sk)
176 return 0;
177
178 pfkey_remove(sk);
179
180 sock_orphan(sk);
181 sock->sk = NULL;
182 skb_queue_purge(&sk->sk_write_queue);
7f6b9dbd 183
184 synchronize_rcu();
1da177e4
LT		 185 sock_put(sk);
186
187 return 0;
188}
189
190static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
dd0fc66f 191 gfp_t allocation, struct sock *sk)
1da177e4
LT		 192{
193 int err = -ENOBUFS;
194
195 sock_hold(sk);
196 if (*skb2 == NULL) {
197 if (atomic_read(&skb->users) != 1) {
198 *skb2 = skb_clone(skb, allocation);
199 } else {
200 *skb2 = skb;
201 atomic_inc(&skb->users);
202 }
203 }
204 if (*skb2 != NULL) {
205 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
1da177e4
LT		 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 227 struct sock *sk;
1da177e4
LT		 228 struct sk_buff *skb2 = NULL;
229 int err = -ESRCH;
230
231 /* XXX Do we need something like netlink_overrun? I think
232 * XXX PF_KEY socket apps will not mind current behavior.
233 */
234 if (!skb)
235 return -ENOMEM;
236
7f6b9dbd 237 rcu_read_lock();
b67bfe0d 238 sk_for_each_rcu(sk, &net_pfkey->table) {
1da177e4
LT		 239 struct pfkey_sock *pfk = pfkey_sk(sk);
240 int err2;
241
242 /* Yes, it means that if you are meant to receive this
243 * pfkey message you receive it twice as promiscuous
244 * socket.
245 */
246 if (pfk->promisc)
247 pfkey_broadcast_one(skb, &skb2, allocation, sk);
248
249 /* the exact target will be processed later */
250 if (sk == one_sk)
251 continue;
252 if (broadcast_flags != BROADCAST_ALL) {
253 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
254 continue;
255 if ((broadcast_flags & BROADCAST_REGISTERED) &&
256 !pfk->registered)
257 continue;
258 if (broadcast_flags & BROADCAST_ONE)
259 continue;
260 }
261
262 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
263
264 /* Error is cleare after succecful sending to at least one
265 * registered KM */
266 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
267 err = err2;
268 }
7f6b9dbd 269 rcu_read_unlock();
1da177e4
LT		 270
271 if (one_sk != NULL)
272 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
273
6f961068 274 kfree_skb(skb2);
1da177e4
LT		 275 kfree_skb(skb);
276 return err;
277}
278
05238204
TT		 279static int pfkey_do_dump(struct pfkey_sock *pfk)
280{
12a169e7 281 struct sadb_msg *hdr;
05238204
TT		 282 int rc;
283
284 rc = pfk->dump.dump(pfk);
285 if (rc == -ENOBUFS)
286 return 0;
287
12a169e7
HX		 288 if (pfk->dump.skb) {
289 if (!pfkey_can_dump(&pfk->sk))
290 return 0;
291
292 hdr = (struct sadb_msg *) pfk->dump.skb->data;
293 hdr->sadb_msg_seq = 0;
294 hdr->sadb_msg_errno = rc;
295 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 296 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 297 pfk->dump.skb = NULL;
298 }
299
05238204
TT		 300 pfkey_terminate_dump(pfk);
301 return rc;
302}
303
4c93fbb0
DM		 304static inline void pfkey_hdr_dup(struct sadb_msg *new,
305 const struct sadb_msg *orig)
1da177e4
LT		 306{
307 *new = *orig;
308}
309
4c93fbb0 310static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
1da177e4
LT		 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
8603b955 341static const u8 sadb_ext_min_len[] = {
1da177e4
LT		 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. */
4c93fbb0 371static int verify_address_len(const void *p)
1da177e4 372{
4c93fbb0
DM		 373 const struct sadb_address *sp = p;
374 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
375 const struct sockaddr_in *sin;
dfd56b8b 376#if IS_ENABLED(CONFIG_IPV6)
4c93fbb0 377 const struct sockaddr_in6 *sin6;
1da177e4
LT		 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;
dfd56b8b 388#if IS_ENABLED(CONFIG_IPV6)
1da177e4 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
4c93fbb0 413static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
df71837d 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
4c93fbb0 420static inline int verify_sec_ctx_len(const void *p)
df71837d 421{
4c93fbb0 422 const struct sadb_x_sec_ctx *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
87536a81
NA		 436static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
437 gfp_t gfp)
df71837d
TJ		 438{
439 struct xfrm_user_sec_ctx *uctx = NULL;
440 int ctx_size = sec_ctx->sadb_x_ctx_len;
441
87536a81 442 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
df71837d
TJ		 443
444 if (!uctx)
445 return NULL;
446
447 uctx->len = pfkey_sec_ctx_len(sec_ctx);
448 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
449 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
450 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
451 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
452 memcpy(uctx + 1, sec_ctx + 1,
453 uctx->ctx_len);
454
455 return uctx;
456}
457
4c93fbb0
DM		 458static int present_and_same_family(const struct sadb_address *src,
459 const struct sadb_address *dst)
1da177e4 460{
4c93fbb0 461 const struct sockaddr *s_addr, *d_addr;
1da177e4
LT		 462
463 if (!src || !dst)
464 return 0;
465
4c93fbb0
DM		 466 s_addr = (const struct sockaddr *)(src + 1);
467 d_addr = (const struct sockaddr *)(dst + 1);
1da177e4
LT		 468 if (s_addr->sa_family != d_addr->sa_family)
469 return 0;
470 if (s_addr->sa_family != AF_INET
dfd56b8b 471#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 472 && s_addr->sa_family != AF_INET6
473#endif
474 )
475 return 0;
476
477 return 1;
478}
479
4c93fbb0 480static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
1da177e4 481{
4c93fbb0 482 const char *p = (char *) hdr;
1da177e4
LT		 483 int len = skb->len;
484
485 len -= sizeof(*hdr);
486 p += sizeof(*hdr);
487 while (len > 0) {
4c93fbb0 488 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
1da177e4
LT		 489 uint16_t ext_type;
490 int ext_len;
491
492 ext_len = ehdr->sadb_ext_len;
493 ext_len *= sizeof(uint64_t);
494 ext_type = ehdr->sadb_ext_type;
495 if (ext_len < sizeof(uint64_t) ||
496 ext_len > len ||
497 ext_type == SADB_EXT_RESERVED)
498 return -EINVAL;
499
500 if (ext_type <= SADB_EXT_MAX) {
501 int min = (int) sadb_ext_min_len[ext_type];
502 if (ext_len < min)
503 return -EINVAL;
504 if (ext_hdrs[ext_type-1] != NULL)
505 return -EINVAL;
506 if (ext_type == SADB_EXT_ADDRESS_SRC ||
507 ext_type == SADB_EXT_ADDRESS_DST ||
508 ext_type == SADB_EXT_ADDRESS_PROXY ||
509 ext_type == SADB_X_EXT_NAT_T_OA) {
510 if (verify_address_len(p))
511 return -EINVAL;
8ff24541 512 }
df71837d
TJ		 513 if (ext_type == SADB_X_EXT_SEC_CTX) {
514 if (verify_sec_ctx_len(p))
515 return -EINVAL;
516 }
4c93fbb0 517 ext_hdrs[ext_type-1] = (void *) p;
1da177e4
LT		 518 }
519 p += ext_len;
520 len -= ext_len;
521 }
522
523 return 0;
524}
525
526static uint16_t
527pfkey_satype2proto(uint8_t satype)
528{
529 switch (satype) {
530 case SADB_SATYPE_UNSPEC:
531 return IPSEC_PROTO_ANY;
532 case SADB_SATYPE_AH:
533 return IPPROTO_AH;
534 case SADB_SATYPE_ESP:
535 return IPPROTO_ESP;
536 case SADB_X_SATYPE_IPCOMP:
537 return IPPROTO_COMP;
538 break;
539 default:
540 return 0;
541 }
542 /* NOTREACHED */
543}
544
545static uint8_t
546pfkey_proto2satype(uint16_t proto)
547{
548 switch (proto) {
549 case IPPROTO_AH:
550 return SADB_SATYPE_AH;
551 case IPPROTO_ESP:
552 return SADB_SATYPE_ESP;
553 case IPPROTO_COMP:
554 return SADB_X_SATYPE_IPCOMP;
555 break;
556 default:
557 return 0;
558 }
559 /* NOTREACHED */
560}
561
562/* BTW, this scheme means that there is no way with PFKEY2 sockets to
563 * say specifically 'just raw sockets' as we encode them as 255.
564 */
565
566static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
567{
a02cec21 568 return proto == IPSEC_PROTO_ANY ? 0 : proto;
1da177e4
LT		 569}
570
571static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
572{
a02cec21 573 return proto ? proto : IPSEC_PROTO_ANY;
1da177e4
LT		 574}
575
9e8b4ed8
YH		 576static inline int pfkey_sockaddr_len(sa_family_t family)
577{
578 switch (family) {
579 case AF_INET:
580 return sizeof(struct sockaddr_in);
dfd56b8b 581#if IS_ENABLED(CONFIG_IPV6)
9e8b4ed8
YH		 582 case AF_INET6:
583 return sizeof(struct sockaddr_in6);
584#endif
585 }
586 return 0;
587}
588
5f95ac91
YH		 589static
590int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
1da177e4 591{
5f95ac91 592 switch (sa->sa_family) {
1da177e4 593 case AF_INET:
8ff24541 594 xaddr->a4 =
5f95ac91 595 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
1da177e4 596 return AF_INET;
dfd56b8b 597#if IS_ENABLED(CONFIG_IPV6)
1da177e4 598 case AF_INET6:
8ff24541 599 memcpy(xaddr->a6,
5f95ac91 600 &((struct sockaddr_in6 *)sa)->sin6_addr,
1da177e4
LT		 601 sizeof(struct in6_addr));
602 return AF_INET6;
603#endif
1da177e4 604 }
5f95ac91
YH		 605 return 0;
606}
607
608static
4c93fbb0 609int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
5f95ac91
YH		 610{
611 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
612 xaddr);
1da177e4
LT		 613}
614
4c93fbb0 615static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 616{
4c93fbb0
DM		 617 const struct sadb_sa *sa;
618 const struct sadb_address *addr;
1da177e4
LT		 619 uint16_t proto;
620 unsigned short family;
621 xfrm_address_t *xaddr;
622
ea110733 623 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 624 if (sa == NULL)
625 return NULL;
626
627 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
628 if (proto == 0)
629 return NULL;
630
631 /* sadb_address_len should be checked by caller */
ea110733 632 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
1da177e4
LT		 633 if (addr == NULL)
634 return NULL;
635
4c93fbb0 636 family = ((const struct sockaddr *)(addr + 1))->sa_family;
1da177e4
LT		 637 switch (family) {
638 case AF_INET:
4c93fbb0 639 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
1da177e4 640 break;
dfd56b8b 641#if IS_ENABLED(CONFIG_IPV6)
1da177e4 642 case AF_INET6:
4c93fbb0 643 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
1da177e4
LT		 644 break;
645#endif
646 default:
647 xaddr = NULL;
648 }
649
650 if (!xaddr)
651 return NULL;
652
bd55775c 653 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
1da177e4
LT		 654}
655
656#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
9e8b4ed8 657
1da177e4
LT		 658static int
659pfkey_sockaddr_size(sa_family_t family)
660{
9e8b4ed8 661 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
1da177e4
LT		 662}
663
55569ce2
KM		 664static inline int pfkey_mode_from_xfrm(int mode)
665{
666 switch(mode) {
667 case XFRM_MODE_TRANSPORT:
668 return IPSEC_MODE_TRANSPORT;
669 case XFRM_MODE_TUNNEL:
670 return IPSEC_MODE_TUNNEL;
671 case XFRM_MODE_BEET:
672 return IPSEC_MODE_BEET;
673 default:
674 return -1;
675 }
676}
677
678static inline int pfkey_mode_to_xfrm(int mode)
679{
680 switch(mode) {
681 case IPSEC_MODE_ANY: /*XXX*/
682 case IPSEC_MODE_TRANSPORT:
683 return XFRM_MODE_TRANSPORT;
684 case IPSEC_MODE_TUNNEL:
685 return XFRM_MODE_TUNNEL;
686 case IPSEC_MODE_BEET:
687 return XFRM_MODE_BEET;
688 default:
689 return -1;
690 }
691}
692
183cad12 693static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
4c93fbb0
DM		 694 struct sockaddr *sa,
695 unsigned short family)
e5b56652
YH		 696{
697 switch (family) {
698 case AF_INET:
699 {
700 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
701 sin->sin_family = AF_INET;
702 sin->sin_port = port;
703 sin->sin_addr.s_addr = xaddr->a4;
704 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
705 return 32;
706 }
dfd56b8b 707#if IS_ENABLED(CONFIG_IPV6)
e5b56652
YH		 708 case AF_INET6:
709 {
710 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
711 sin6->sin6_family = AF_INET6;
712 sin6->sin6_port = port;
713 sin6->sin6_flowinfo = 0;
4e3fd7a0 714 sin6->sin6_addr = *(struct in6_addr *)xaddr->a6;
e5b56652
YH		 715 sin6->sin6_scope_id = 0;
716 return 128;
717 }
718#endif
719 }
720 return 0;
721}
722
4c93fbb0 723static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
050f009e 724 int add_keys, int hsc)
1da177e4
LT		 725{
726 struct sk_buff *skb;
727 struct sadb_msg *hdr;
728 struct sadb_sa *sa;
729 struct sadb_lifetime *lifetime;
730 struct sadb_address *addr;
731 struct sadb_key *key;
732 struct sadb_x_sa2 *sa2;
df71837d
TJ		 733 struct sadb_x_sec_ctx *sec_ctx;
734 struct xfrm_sec_ctx *xfrm_ctx;
735 int ctx_size = 0;
1da177e4
LT		 736 int size;
737 int auth_key_size = 0;
738 int encrypt_key_size = 0;
739 int sockaddr_size;
740 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 741 int mode;
1da177e4
LT		 742
743 /* address family check */
744 sockaddr_size = pfkey_sockaddr_size(x->props.family);
745 if (!sockaddr_size)
746 return ERR_PTR(-EINVAL);
747
748 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
749 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 750 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 751 sizeof(struct sadb_lifetime) +
752 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
753 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 754 sizeof(struct sadb_address)*2 +
1da177e4
LT		 755 sockaddr_size*2 +
756 sizeof(struct sadb_x_sa2);
df71837d
TJ		 757
758 if ((xfrm_ctx = x->security)) {
759 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
760 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
761 }
762
1da177e4 763 /* identity & sensitivity */
70e94e66 764 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
1da177e4
LT		 765 size += sizeof(struct sadb_address) + sockaddr_size;
766
767 if (add_keys) {
768 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 769 auth_key_size =
770 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 771 size += sizeof(struct sadb_key) + auth_key_size;
772 }
773 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 774 encrypt_key_size =
775 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 776 size += sizeof(struct sadb_key) + encrypt_key_size;
777 }
778 }
779 if (x->encap)
780 natt = x->encap;
781
782 if (natt && natt->encap_type) {
783 size += sizeof(struct sadb_x_nat_t_type);
784 size += sizeof(struct sadb_x_nat_t_port);
785 size += sizeof(struct sadb_x_nat_t_port);
786 }
787
788 skb = alloc_skb(size + 16, GFP_ATOMIC);
789 if (skb == NULL)
790 return ERR_PTR(-ENOBUFS);
791
792 /* call should fill header later */
793 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
794 memset(hdr, 0, size); /* XXX do we need this ? */
795 hdr->sadb_msg_len = size / sizeof(uint64_t);
796
797 /* sa */
798 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
799 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
800 sa->sadb_sa_exttype = SADB_EXT_SA;
801 sa->sadb_sa_spi = x->id.spi;
802 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 803 switch (x->km.state) {
804 case XFRM_STATE_VALID:
805 sa->sadb_sa_state = x->km.dying ?
806 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
807 break;
808 case XFRM_STATE_ACQ:
1da177e4 809 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 810 break;
811 default:
1da177e4 812 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 813 break;
814 }
1da177e4
LT		 815 sa->sadb_sa_auth = 0;
816 if (x->aalg) {
817 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
7e50f84c
JK		 818 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
819 a->desc.sadb_alg_id : 0;
1da177e4
LT		 820 }
821 sa->sadb_sa_encrypt = 0;
822 BUG_ON(x->ealg && x->calg);
823 if (x->ealg) {
824 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
7e50f84c
JK		 825 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
826 a->desc.sadb_alg_id : 0;
1da177e4
LT		 827 }
828 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
829 if (x->calg) {
830 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
7e50f84c
JK		 831 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
832 a->desc.sadb_alg_id : 0;
1da177e4
LT		 833 }
834
835 sa->sadb_sa_flags = 0;
836 if (x->props.flags & XFRM_STATE_NOECN)
837 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
838 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
839 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 840 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
841 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 842
843 /* hard time */
844 if (hsc & 2) {
8ff24541 845 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 846 sizeof(struct sadb_lifetime));
847 lifetime->sadb_lifetime_len =
848 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
849 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
850 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
851 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
852 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
853 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
854 }
855 /* soft time */
856 if (hsc & 1) {
8ff24541 857 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 858 sizeof(struct sadb_lifetime));
859 lifetime->sadb_lifetime_len =
860 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
861 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
862 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
863 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
864 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
865 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
866 }
867 /* current time */
868 lifetime = (struct sadb_lifetime *) skb_put(skb,
869 sizeof(struct sadb_lifetime));
870 lifetime->sadb_lifetime_len =
871 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
872 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
873 lifetime->sadb_lifetime_allocations = x->curlft.packets;
874 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
875 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
876 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
877 /* src address */
8ff24541 878 addr = (struct sadb_address*) skb_put(skb,
1da177e4 879 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 880 addr->sadb_address_len =
1da177e4
LT		 881 (sizeof(struct sadb_address)+sockaddr_size)/
882 sizeof(uint64_t);
883 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 884 /* "if the ports are non-zero, then the sadb_address_proto field,
885 normally zero, MUST be filled in with the transport
1da177e4 886 protocol's number." - RFC2367 */
8ff24541 887 addr->sadb_address_proto = 0;
1da177e4 888 addr->sadb_address_reserved = 0;
1da177e4 889
e5b56652
YH		 890 addr->sadb_address_prefixlen =
891 pfkey_sockaddr_fill(&x->props.saddr, 0,
892 (struct sockaddr *) (addr + 1),
893 x->props.family);
894 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 895 BUG();
896
897 /* dst address */
8ff24541 898 addr = (struct sadb_address*) skb_put(skb,
1da177e4 899 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 900 addr->sadb_address_len =
1da177e4
LT		 901 (sizeof(struct sadb_address)+sockaddr_size)/
902 sizeof(uint64_t);
903 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
8ff24541 904 addr->sadb_address_proto = 0;
1da177e4 905 addr->sadb_address_reserved = 0;
1da177e4 906
e5b56652
YH		 907 addr->sadb_address_prefixlen =
908 pfkey_sockaddr_fill(&x->id.daddr, 0,
909 (struct sockaddr *) (addr + 1),
910 x->props.family);
911 if (!addr->sadb_address_prefixlen)
912 BUG();
1da177e4 913
70e94e66
YH		 914 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
915 x->props.family)) {
e5b56652
YH		 916 addr = (struct sadb_address*) skb_put(skb,
917 sizeof(struct sadb_address)+sockaddr_size);
918 addr->sadb_address_len =
919 (sizeof(struct sadb_address)+sockaddr_size)/
920 sizeof(uint64_t);
921 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
922 addr->sadb_address_proto =
923 pfkey_proto_from_xfrm(x->sel.proto);
924 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
925 addr->sadb_address_reserved = 0;
1da177e4 926
e5b56652
YH		 927 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
928 (struct sockaddr *) (addr + 1),
929 x->props.family);
1da177e4 930 }
1da177e4
LT		 931
932 /* auth key */
933 if (add_keys && auth_key_size) {
8ff24541 934 key = (struct sadb_key *) skb_put(skb,
1da177e4
LT		 935 sizeof(struct sadb_key)+auth_key_size);
936 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
937 sizeof(uint64_t);
938 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
939 key->sadb_key_bits = x->aalg->alg_key_len;
940 key->sadb_key_reserved = 0;
941 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
942 }
943 /* encrypt key */
944 if (add_keys && encrypt_key_size) {
8ff24541 945 key = (struct sadb_key *) skb_put(skb,
1da177e4 946 sizeof(struct sadb_key)+encrypt_key_size);
8ff24541 947 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 948 encrypt_key_size) / sizeof(uint64_t);
949 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
950 key->sadb_key_bits = x->ealg->alg_key_len;
951 key->sadb_key_reserved = 0;
8ff24541 952 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 953 (x->ealg->alg_key_len+7)/8);
954 }
955
956 /* sa */
957 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
958 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
959 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 960 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
961 kfree_skb(skb);
962 return ERR_PTR(-EINVAL);
963 }
964 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 965 sa2->sadb_x_sa2_reserved1 = 0;
966 sa2->sadb_x_sa2_reserved2 = 0;
967 sa2->sadb_x_sa2_sequence = 0;
968 sa2->sadb_x_sa2_reqid = x->props.reqid;
969
970 if (natt && natt->encap_type) {
971 struct sadb_x_nat_t_type *n_type;
972 struct sadb_x_nat_t_port *n_port;
973
974 /* type */
975 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
976 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
977 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
978 n_type->sadb_x_nat_t_type_type = natt->encap_type;
979 n_type->sadb_x_nat_t_type_reserved[0] = 0;
980 n_type->sadb_x_nat_t_type_reserved[1] = 0;
981 n_type->sadb_x_nat_t_type_reserved[2] = 0;
982
983 /* source port */
984 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
985 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
986 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
987 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
988 n_port->sadb_x_nat_t_port_reserved = 0;
989
990 /* dest port */
991 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
992 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
993 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
994 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
995 n_port->sadb_x_nat_t_port_reserved = 0;
996 }
997
df71837d
TJ		 998 /* security context */
999 if (xfrm_ctx) {
1000 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1001 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1002 sec_ctx->sadb_x_sec_len =
1003 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1004 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1005 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1006 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1007 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1008 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1009 xfrm_ctx->ctx_len);
1010 }
1011
1da177e4
LT		 1012 return skb;
1013}
1014
050f009e 1015
4c93fbb0 1016static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
050f009e
HX		 1017{
1018 struct sk_buff *skb;
1019
050f009e 1020 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1021
1022 return skb;
1023}
1024
4c93fbb0 1025static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
050f009e
HX		 1026 int hsc)
1027{
1028 return __pfkey_xfrm_state2msg(x, 0, hsc);
1029}
1030
07fb0f17 1031static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
4c93fbb0
DM		 1032 const struct sadb_msg *hdr,
1033 void * const *ext_hdrs)
1da177e4 1034{
8ff24541 1035 struct xfrm_state *x;
4c93fbb0
DM		 1036 const struct sadb_lifetime *lifetime;
1037 const struct sadb_sa *sa;
1038 const struct sadb_key *key;
1039 const struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1040 uint16_t proto;
1041 int err;
8ff24541 1042
1da177e4 1043
ea110733 1044 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 1045 if (!sa ||
1046 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1047 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1048 return ERR_PTR(-EINVAL);
1049 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1050 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1051 return ERR_PTR(-EINVAL);
1052 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1053 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1054 return ERR_PTR(-EINVAL);
1055 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1056 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1057 return ERR_PTR(-EINVAL);
1058
1059 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1060 if (proto == 0)
1061 return ERR_PTR(-EINVAL);
1062
1063 /* default error is no buffer space */
1064 err = -ENOBUFS;
1065
1066 /* RFC2367:
1067
1068 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1069 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1070 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1071 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1072 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1073 not true.
1074
8ff24541 1075 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1076 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1077 */
1078 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1079 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1080 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1081 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1082 return ERR_PTR(-EINVAL);
ea110733 1083 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1084 if (key != NULL &&
1085 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1086 ((key->sadb_key_bits+7) / 8 == 0 ||
1087 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1088 return ERR_PTR(-EINVAL);
1089 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1090 if (key != NULL &&
1091 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1092 ((key->sadb_key_bits+7) / 8 == 0 ||
1093 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1094 return ERR_PTR(-EINVAL);
1095
07fb0f17 1096 x = xfrm_state_alloc(net);
1da177e4
LT		 1097 if (x == NULL)
1098 return ERR_PTR(-ENOBUFS);
1099
1100 x->id.proto = proto;
1101 x->id.spi = sa->sadb_sa_spi;
33fce60d
FD		 1102 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1103 (sizeof(x->replay.bitmap) * 8));
1da177e4
LT		 1104 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1105 x->props.flags |= XFRM_STATE_NOECN;
1106 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1107 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1108 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1109 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4 1110
ea110733 1111 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1da177e4
LT		 1112 if (lifetime != NULL) {
1113 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1114 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1115 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1116 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1117 }
ea110733 1118 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1da177e4
LT		 1119 if (lifetime != NULL) {
1120 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1121 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1122 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1123 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1124 }
df71837d 1125
ea110733 1126 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 1127 if (sec_ctx != NULL) {
87536a81 1128 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 1129
1130 if (!uctx)
1131 goto out;
1132
1133 err = security_xfrm_state_alloc(x, uctx);
1134 kfree(uctx);
1135
1136 if (err)
1137 goto out;
1138 }
1139
ea110733 1140 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1141 if (sa->sadb_sa_auth) {
1142 int keysize = 0;
1143 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
7e50f84c 1144 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1145 err = -ENOSYS;
1146 goto out;
1147 }
1148 if (key)
1149 keysize = (key->sadb_key_bits + 7) / 8;
1150 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1151 if (!x->aalg)
1152 goto out;
1153 strcpy(x->aalg->alg_name, a->name);
1154 x->aalg->alg_key_len = 0;
1155 if (key) {
1156 x->aalg->alg_key_len = key->sadb_key_bits;
1157 memcpy(x->aalg->alg_key, key+1, keysize);
1158 }
c20a66f4 1159 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1da177e4
LT		 1160 x->props.aalgo = sa->sadb_sa_auth;
1161 /* x->algo.flags = sa->sadb_sa_flags; */
1162 }
1163 if (sa->sadb_sa_encrypt) {
1164 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1165 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1166 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1167 err = -ENOSYS;
1168 goto out;
1169 }
1170 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1171 if (!x->calg)
1172 goto out;
1173 strcpy(x->calg->alg_name, a->name);
1174 x->props.calgo = sa->sadb_sa_encrypt;
1175 } else {
1176 int keysize = 0;
1177 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1178 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1179 err = -ENOSYS;
1180 goto out;
1181 }
1182 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1183 if (key)
1184 keysize = (key->sadb_key_bits + 7) / 8;
1185 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1186 if (!x->ealg)
1187 goto out;
1188 strcpy(x->ealg->alg_name, a->name);
1189 x->ealg->alg_key_len = 0;
1190 if (key) {
1191 x->ealg->alg_key_len = key->sadb_key_bits;
1192 memcpy(x->ealg->alg_key, key+1, keysize);
1193 }
1194 x->props.ealgo = sa->sadb_sa_encrypt;
1195 }
1196 }
1197 /* x->algo.flags = sa->sadb_sa_flags; */
1198
8ff24541 1199 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4 1200 &x->props.saddr);
8ff24541 1201 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1202 &x->id.daddr);
1203
1204 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
4c93fbb0 1205 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1206 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1207 if (mode < 0) {
1208 err = -EINVAL;
1209 goto out;
1210 }
1211 x->props.mode = mode;
1da177e4
LT		 1212 x->props.reqid = sa2->sadb_x_sa2_reqid;
1213 }
1214
1215 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
4c93fbb0 1216 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1da177e4
LT		 1217
1218 /* Nobody uses this, but we try. */
1219 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1220 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1221 }
1222
4da51056 1223 if (!x->sel.family)
4a4b6271
JL		 1224 x->sel.family = x->props.family;
1225
1da177e4 1226 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
4c93fbb0 1227 const struct sadb_x_nat_t_type* n_type;
1da177e4
LT		 1228 struct xfrm_encap_tmpl *natt;
1229
1230 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1231 if (!x->encap)
1232 goto out;
1233
1234 natt = x->encap;
1235 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1236 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1237
1238 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
4c93fbb0 1239 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1240 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1241 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1242 }
1243 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
4c93fbb0 1244 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1245 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1246 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1247 }
a8d694c6 1248 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1da177e4
LT		 1249 }
1250
72cb6962
HX		 1251 err = xfrm_init_state(x);
1252 if (err)
1da177e4 1253 goto out;
72cb6962 1254
1da177e4 1255 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1256 return x;
1257
1258out:
1259 x->km.state = XFRM_STATE_DEAD;
1260 xfrm_state_put(x);
1261 return ERR_PTR(err);
1262}
1263
4c93fbb0 1264static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1265{
1266 return -EOPNOTSUPP;
1267}
1268
4c93fbb0 1269static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1270{
07fb0f17 1271 struct net *net = sock_net(sk);
1da177e4
LT		 1272 struct sk_buff *resp_skb;
1273 struct sadb_x_sa2 *sa2;
1274 struct sadb_address *saddr, *daddr;
1275 struct sadb_msg *out_hdr;
658b219e 1276 struct sadb_spirange *range;
1da177e4 1277 struct xfrm_state *x = NULL;
55569ce2 1278 int mode;
658b219e
HX		 1279 int err;
1280 u32 min_spi, max_spi;
1da177e4
LT		 1281 u32 reqid;
1282 u8 proto;
1283 unsigned short family;
1284 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1285
1286 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1287 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1288 return -EINVAL;
1289
1290 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1291 if (proto == 0)
1292 return -EINVAL;
1293
1294 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1295 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1296 if (mode < 0)
1297 return -EINVAL;
1da177e4
LT		 1298 reqid = sa2->sadb_x_sa2_reqid;
1299 } else {
1300 mode = 0;
1301 reqid = 0;
1302 }
1303
1304 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1305 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1306
1307 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1308 switch (family) {
1309 case AF_INET:
1310 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1311 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1312 break;
dfd56b8b 1313#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1314 case AF_INET6:
1315 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1316 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1317 break;
1318#endif
1319 }
1320
1321 if (hdr->sadb_msg_seq) {
bd55775c 1322 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
70e94e66 1323 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1da177e4
LT		 1324 xfrm_state_put(x);
1325 x = NULL;
1326 }
1327 }
1328
1329 if (!x)
bd55775c 1330 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1da177e4
LT		 1331
1332 if (x == NULL)
1333 return -ENOENT;
1334
658b219e
HX		 1335 min_spi = 0x100;
1336 max_spi = 0x0fffffff;
1da177e4 1337
658b219e
HX		 1338 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1339 if (range) {
1340 min_spi = range->sadb_spirange_min;
1341 max_spi = range->sadb_spirange_max;
1da177e4 1342 }
658b219e 1343
776e9dd9
FD		 1344 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1345 if (err) {
1346 xfrm_state_put(x);
1347 return err;
1348 }
1349
658b219e 1350 err = xfrm_alloc_spi(x, min_spi, max_spi);
050f009e 1351 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1352
1353 if (IS_ERR(resp_skb)) {
1354 xfrm_state_put(x);
1355 return PTR_ERR(resp_skb);
1356 }
1357
1358 out_hdr = (struct sadb_msg *) resp_skb->data;
1359 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1360 out_hdr->sadb_msg_type = SADB_GETSPI;
1361 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1362 out_hdr->sadb_msg_errno = 0;
1363 out_hdr->sadb_msg_reserved = 0;
1364 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1365 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1366
1367 xfrm_state_put(x);
1368
07fb0f17 1369 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1da177e4
LT		 1370
1371 return 0;
1372}
1373
4c93fbb0 1374static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1375{
07fb0f17 1376 struct net *net = sock_net(sk);
1da177e4
LT		 1377 struct xfrm_state *x;
1378
1379 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1380 return -EOPNOTSUPP;
1381
1382 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1383 return 0;
1384
bd55775c 1385 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1da177e4
LT		 1386 if (x == NULL)
1387 return 0;
1388
1389 spin_lock_bh(&x->lock);
5b8ef341 1390 if (x->km.state == XFRM_STATE_ACQ)
1da177e4 1391 x->km.state = XFRM_STATE_ERROR;
5b8ef341 1392
1da177e4
LT		 1393 spin_unlock_bh(&x->lock);
1394 xfrm_state_put(x);
1395 return 0;
1396}
1397
26b15dad
JHS		 1398static inline int event2poltype(int event)
1399{
1400 switch (event) {
f60f6b8f 1401 case XFRM_MSG_DELPOLICY:
26b15dad 1402 return SADB_X_SPDDELETE;
f60f6b8f 1403 case XFRM_MSG_NEWPOLICY:
26b15dad 1404 return SADB_X_SPDADD;
f60f6b8f 1405 case XFRM_MSG_UPDPOLICY:
26b15dad 1406 return SADB_X_SPDUPDATE;
f60f6b8f 1407 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1408 // return SADB_X_SPDEXPIRE;
1409 default:
207024b9 1410 pr_err("pfkey: Unknown policy event %d\n", event);
26b15dad
JHS		 1411 break;
1412 }
1413
1414 return 0;
1415}
1416
1417static inline int event2keytype(int event)
1418{
1419 switch (event) {
f60f6b8f 1420 case XFRM_MSG_DELSA:
26b15dad 1421 return SADB_DELETE;
f60f6b8f 1422 case XFRM_MSG_NEWSA:
26b15dad 1423 return SADB_ADD;
f60f6b8f 1424 case XFRM_MSG_UPDSA:
26b15dad 1425 return SADB_UPDATE;
f60f6b8f 1426 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1427 return SADB_EXPIRE;
1428 default:
207024b9 1429 pr_err("pfkey: Unknown SA event %d\n", event);
26b15dad
JHS		 1430 break;
1431 }
1432
1433 return 0;
1434}
1435
1436/* ADD/UPD/DEL */
214e005b 1437static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1438{
1439 struct sk_buff *skb;
1440 struct sadb_msg *hdr;
26b15dad 1441
050f009e 1442 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1443
1444 if (IS_ERR(skb))
1445 return PTR_ERR(skb);
1446
1447 hdr = (struct sadb_msg *) skb->data;
1448 hdr->sadb_msg_version = PF_KEY_V2;
1449 hdr->sadb_msg_type = event2keytype(c->event);
1450 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1451 hdr->sadb_msg_errno = 0;
1452 hdr->sadb_msg_reserved = 0;
1453 hdr->sadb_msg_seq = c->seq;
15e47304 1454 hdr->sadb_msg_pid = c->portid;
26b15dad 1455
07fb0f17 1456 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
26b15dad
JHS		 1457
1458 return 0;
1459}
1da177e4 1460
4c93fbb0 1461static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1462{
07fb0f17 1463 struct net *net = sock_net(sk);
1da177e4
LT		 1464 struct xfrm_state *x;
1465 int err;
26b15dad 1466 struct km_event c;
1da177e4 1467
07fb0f17 1468 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1da177e4
LT		 1469 if (IS_ERR(x))
1470 return PTR_ERR(x);
1471
26b15dad 1472 xfrm_state_hold(x);
1da177e4
LT		 1473 if (hdr->sadb_msg_type == SADB_ADD)
1474 err = xfrm_state_add(x);
1475 else
1476 err = xfrm_state_update(x);
1477
ab5f5e8b 1478 xfrm_audit_state_add(x, err ? 0 : 1,
2532386f
EP		 1479 audit_get_loginuid(current),
1480 audit_get_sessionid(current), 0);
161a09e7 1481
1da177e4
LT		 1482 if (err < 0) {
1483 x->km.state = XFRM_STATE_DEAD;
21380b81 1484 __xfrm_state_put(x);
7d6dfe1f 1485 goto out;
1da177e4
LT		 1486 }
1487
26b15dad 1488 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1489 c.event = XFRM_MSG_NEWSA;
26b15dad 1490 else
f60f6b8f 1491 c.event = XFRM_MSG_UPDSA;
26b15dad 1492 c.seq = hdr->sadb_msg_seq;
15e47304 1493 c.portid = hdr->sadb_msg_pid;
26b15dad 1494 km_state_notify(x, &c);
7d6dfe1f 1495out:
26b15dad 1496 xfrm_state_put(x);
26b15dad 1497 return err;
1da177e4
LT		 1498}
1499
4c93fbb0 1500static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1501{
07fb0f17 1502 struct net *net = sock_net(sk);
1da177e4 1503 struct xfrm_state *x;
26b15dad
JHS		 1504 struct km_event c;
1505 int err;
1da177e4
LT		 1506
1507 if (!ext_hdrs[SADB_EXT_SA-1] ||
1508 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1509 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1510 return -EINVAL;
1511
07fb0f17 1512 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1513 if (x == NULL)
1514 return -ESRCH;
1515
c8c05a8e
CZ		 1516 if ((err = security_xfrm_state_delete(x)))
1517 goto out;
1518
1da177e4 1519 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1520 err = -EPERM;
1521 goto out;
1da177e4 1522 }
161a09e7 1523
26b15dad 1524 err = xfrm_state_delete(x);
161a09e7 1525
c8c05a8e
CZ		 1526 if (err < 0)
1527 goto out;
1da177e4 1528
26b15dad 1529 c.seq = hdr->sadb_msg_seq;
15e47304 1530 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1531 c.event = XFRM_MSG_DELSA;
26b15dad 1532 km_state_notify(x, &c);
c8c05a8e 1533out:
ab5f5e8b 1534 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 1535 audit_get_loginuid(current),
1536 audit_get_sessionid(current), 0);
26b15dad 1537 xfrm_state_put(x);
1da177e4 1538
26b15dad 1539 return err;
1da177e4
LT		 1540}
1541
4c93fbb0 1542static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1543{
07fb0f17 1544 struct net *net = sock_net(sk);
1da177e4
LT		 1545 __u8 proto;
1546 struct sk_buff *out_skb;
1547 struct sadb_msg *out_hdr;
1548 struct xfrm_state *x;
1549
1550 if (!ext_hdrs[SADB_EXT_SA-1] ||
1551 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1552 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1553 return -EINVAL;
1554
07fb0f17 1555 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1556 if (x == NULL)
1557 return -ESRCH;
1558
050f009e 1559 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1560 proto = x->id.proto;
1561 xfrm_state_put(x);
1562 if (IS_ERR(out_skb))
1563 return PTR_ERR(out_skb);
1564
1565 out_hdr = (struct sadb_msg *) out_skb->data;
1566 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1567 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1568 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1569 out_hdr->sadb_msg_errno = 0;
1570 out_hdr->sadb_msg_reserved = 0;
1571 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1572 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
07fb0f17 1573 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 1574
1575 return 0;
1576}
1577
4c93fbb0 1578static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
dd0fc66f 1579 gfp_t allocation)
1da177e4
LT		 1580{
1581 struct sk_buff *skb;
1582 struct sadb_msg *hdr;
1583 int len, auth_len, enc_len, i;
1584
7e50f84c 1585 auth_len = xfrm_count_pfkey_auth_supported();
1da177e4
LT		 1586 if (auth_len) {
1587 auth_len *= sizeof(struct sadb_alg);
1588 auth_len += sizeof(struct sadb_supported);
1589 }
8ff24541 1590
7e50f84c 1591 enc_len = xfrm_count_pfkey_enc_supported();
1da177e4
LT		 1592 if (enc_len) {
1593 enc_len *= sizeof(struct sadb_alg);
1594 enc_len += sizeof(struct sadb_supported);
1595 }
8ff24541 1596
1da177e4
LT		 1597 len = enc_len + auth_len + sizeof(struct sadb_msg);
1598
1599 skb = alloc_skb(len + 16, allocation);
1600 if (!skb)
1601 goto out_put_algs;
1602
1603 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1604 pfkey_hdr_dup(hdr, orig);
1605 hdr->sadb_msg_errno = 0;
1606 hdr->sadb_msg_len = len / sizeof(uint64_t);
1607
1608 if (auth_len) {
1609 struct sadb_supported *sp;
1610 struct sadb_alg *ap;
1611
1612 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1613 ap = (struct sadb_alg *) (sp + 1);
1614
1615 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1616 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1617
1618 for (i = 0; ; i++) {
1619 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1620 if (!aalg)
1621 break;
7e50f84c
JK		 1622 if (!aalg->pfkey_supported)
1623 continue;
1da177e4
LT		 1624 if (aalg->available)
1625 *ap++ = aalg->desc;
1626 }
1627 }
1628
1629 if (enc_len) {
1630 struct sadb_supported *sp;
1631 struct sadb_alg *ap;
1632
1633 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1634 ap = (struct sadb_alg *) (sp + 1);
1635
1636 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1637 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1638
1639 for (i = 0; ; i++) {
1640 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1641 if (!ealg)
1642 break;
7e50f84c
JK		 1643 if (!ealg->pfkey_supported)
1644 continue;
1da177e4
LT		 1645 if (ealg->available)
1646 *ap++ = ealg->desc;
1647 }
1648 }
1649
1650out_put_algs:
1651 return skb;
1652}
1653
4c93fbb0 1654static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1655{
1656 struct pfkey_sock *pfk = pfkey_sk(sk);
1657 struct sk_buff *supp_skb;
1658
1659 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1660 return -EINVAL;
1661
1662 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1663 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1664 return -EEXIST;
1665 pfk->registered |= (1<<hdr->sadb_msg_satype);
1666 }
1667
1668 xfrm_probe_algs();
8ff24541 1669
1da177e4
LT		 1670 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1671 if (!supp_skb) {
1672 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1673 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1674
1675 return -ENOBUFS;
1676 }
1677
07fb0f17 1678 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
1da177e4
LT		 1679
1680 return 0;
1681}
1682
4c93fbb0 1683static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
8be987d7
JHS		 1684{
1685 struct sk_buff *skb;
1686 struct sadb_msg *hdr;
1687
1688 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1689 if (!skb)
1690 return -ENOBUFS;
1691
1692 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1693 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1694 hdr->sadb_msg_errno = (uint8_t) 0;
1695 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1696
1697 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1698}
1699
214e005b 1700static int key_notify_sa_flush(const struct km_event *c)
26b15dad
JHS		 1701{
1702 struct sk_buff *skb;
1703 struct sadb_msg *hdr;
1704
1705 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1706 if (!skb)
1707 return -ENOBUFS;
1708 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1709 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1710 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad 1711 hdr->sadb_msg_seq = c->seq;
15e47304 1712 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 1713 hdr->sadb_msg_version = PF_KEY_V2;
1714 hdr->sadb_msg_errno = (uint8_t) 0;
1715 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 1716 hdr->sadb_msg_reserved = 0;
26b15dad 1717
07fb0f17 1718 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad
JHS		 1719
1720 return 0;
1721}
1722
4c93fbb0 1723static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1724{
07fb0f17 1725 struct net *net = sock_net(sk);
95c96174 1726 unsigned int proto;
26b15dad 1727 struct km_event c;
161a09e7 1728 struct xfrm_audit audit_info;
8be987d7 1729 int err, err2;
1da177e4
LT		 1730
1731 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1732 if (proto == 0)
1733 return -EINVAL;
1734
0c11b942 1735 audit_info.loginuid = audit_get_loginuid(current);
2532386f 1736 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 1737 audit_info.secid = 0;
07fb0f17 1738 err = xfrm_state_flush(net, proto, &audit_info);
8be987d7 1739 err2 = unicast_flush_resp(sk, hdr);
9e64cc95
JHS		 1740 if (err || err2) {
1741 if (err == -ESRCH) /* empty table - go quietly */
1742 err = 0;
8be987d7 1743 return err ? err : err2;
9e64cc95 1744 }
8be987d7 1745
bf08867f 1746 c.data.proto = proto;
26b15dad 1747 c.seq = hdr->sadb_msg_seq;
15e47304 1748 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1749 c.event = XFRM_MSG_FLUSHSA;
07fb0f17 1750 c.net = net;
26b15dad 1751 km_state_notify(NULL, &c);
1da177e4
LT		 1752
1753 return 0;
1754}
1755
1da177e4
LT		 1756static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1757{
83321d6b 1758 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 1759 struct sk_buff *out_skb;
1760 struct sadb_msg *out_hdr;
1761
83321d6b
TT		 1762 if (!pfkey_can_dump(&pfk->sk))
1763 return -ENOBUFS;
1764
050f009e 1765 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1766 if (IS_ERR(out_skb))
1767 return PTR_ERR(out_skb);
1768
1769 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 1770 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 1771 out_hdr->sadb_msg_type = SADB_DUMP;
1772 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1773 out_hdr->sadb_msg_errno = 0;
1774 out_hdr->sadb_msg_reserved = 0;
12a169e7 1775 out_hdr->sadb_msg_seq = count + 1;
15e47304 1776 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 1777
1778 if (pfk->dump.skb)
1779 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 1780 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 1781 pfk->dump.skb = out_skb;
1782
1da177e4
LT		 1783 return 0;
1784}
1785
83321d6b
TT		 1786static int pfkey_dump_sa(struct pfkey_sock *pfk)
1787{
07fb0f17
AD		 1788 struct net *net = sock_net(&pfk->sk);
1789 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
83321d6b
TT		 1790}
1791
1792static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1793{
283bc9f3
FD		 1794 struct net *net = sock_net(&pfk->sk);
1795
1796 xfrm_state_walk_done(&pfk->dump.u.state, net);
83321d6b
TT		 1797}
1798
4c93fbb0 1799static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1800{
1801 u8 proto;
83321d6b
TT		 1802 struct pfkey_sock *pfk = pfkey_sk(sk);
1803
1804 if (pfk->dump.dump != NULL)
1805 return -EBUSY;
1da177e4
LT		 1806
1807 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1808 if (proto == 0)
1809 return -EINVAL;
1810
83321d6b 1811 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 1812 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 1813 pfk->dump.dump = pfkey_dump_sa;
1814 pfk->dump.done = pfkey_dump_sa_done;
1815 xfrm_state_walk_init(&pfk->dump.u.state, proto);
4c563f76 1816
83321d6b 1817 return pfkey_do_dump(pfk);
1da177e4
LT		 1818}
1819
4c93fbb0 1820static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1821{
1822 struct pfkey_sock *pfk = pfkey_sk(sk);
1823 int satype = hdr->sadb_msg_satype;
4c93fbb0 1824 bool reset_errno = false;
1da177e4
LT		 1825
1826 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
4c93fbb0 1827 reset_errno = true;
1da177e4
LT		 1828 if (satype != 0 && satype != 1)
1829 return -EINVAL;
1830 pfk->promisc = satype;
1831 }
4c93fbb0
DM		 1832 if (reset_errno && skb_cloned(skb))
1833 skb = skb_copy(skb, GFP_KERNEL);
1834 else
1835 skb = skb_clone(skb, GFP_KERNEL);
1836
1837 if (reset_errno && skb) {
1838 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1839 new_hdr->sadb_msg_errno = 0;
1840 }
1841
1842 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1da177e4
LT		 1843 return 0;
1844}
1845
1846static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1847{
1848 int i;
1849 u32 reqid = *(u32*)ptr;
1850
1851 for (i=0; i<xp->xfrm_nr; i++) {
1852 if (xp->xfrm_vec[i].reqid == reqid)
1853 return -EEXIST;
1854 }
1855 return 0;
1856}
1857
07fb0f17 1858static u32 gen_reqid(struct net *net)
1da177e4 1859{
4c563f76 1860 struct xfrm_policy_walk walk;
1da177e4 1861 u32 start;
4c563f76 1862 int rc;
1da177e4
LT		 1863 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1864
1865 start = reqid;
1866 do {
1867 ++reqid;
1868 if (reqid == 0)
1869 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76 1870 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
07fb0f17 1871 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
283bc9f3 1872 xfrm_policy_walk_done(&walk, net);
4c563f76 1873 if (rc != -EEXIST)
1da177e4
LT		 1874 return reqid;
1875 } while (reqid != start);
1876 return 0;
1877}
1878
1879static int
1880parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1881{
07fb0f17 1882 struct net *net = xp_net(xp);
1da177e4 1883 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
55569ce2 1884 int mode;
1da177e4
LT		 1885
1886 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1887 return -ELOOP;
1888
1889 if (rq->sadb_x_ipsecrequest_mode == 0)
1890 return -EINVAL;
1891
1892 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1893 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1894 return -EINVAL;
1895 t->mode = mode;
1da177e4
LT		 1896 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1897 t->optional = 1;
1898 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1899 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1900 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1901 t->reqid = 0;
07fb0f17 1902 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1da177e4
LT		 1903 return -ENOBUFS;
1904 }
1905
1906 /* addresses present only in tunnel mode */
7e49e6de 1907 if (t->mode == XFRM_MODE_TUNNEL) {
5f95ac91
YH		 1908 u8 *sa = (u8 *) (rq + 1);
1909 int family, socklen;
1910
1911 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1912 &t->saddr);
1913 if (!family)
1da177e4 1914 return -EINVAL;
5f95ac91
YH		 1915
1916 socklen = pfkey_sockaddr_len(family);
1917 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1918 &t->id.daddr) != family)
1919 return -EINVAL;
1920 t->encap_family = family;
2718aa7c
MK		 1921 } else
1922 t->encap_family = xp->family;
1923
1da177e4 1924 /* No way to set this via kame pfkey */
c5d18e98 1925 t->allalgs = 1;
1da177e4
LT		 1926 xp->xfrm_nr++;
1927 return 0;
1928}
1929
1930static int
1931parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1932{
1933 int err;
1934 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1935 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1936
f674e72f
DC		 1937 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1938 return -EINVAL;
1939
1da177e4
LT		 1940 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1941 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1942 return err;
1943 len -= rq->sadb_x_ipsecrequest_len;
1944 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1945 }
1946 return 0;
1947}
1948
4c93fbb0 1949static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
df71837d
TJ		 1950{
1951 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1952
1953 if (xfrm_ctx) {
1954 int len = sizeof(struct sadb_x_sec_ctx);
1955 len += xfrm_ctx->ctx_len;
1956 return PFKEY_ALIGN8(len);
1957 }
1958 return 0;
1959}
1960
4c93fbb0 1961static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1da177e4 1962{
4c93fbb0 1963 const struct xfrm_tmpl *t;
1da177e4 1964 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 1965 int socklen = 0;
1966 int i;
1967
1968 for (i=0; i<xp->xfrm_nr; i++) {
1969 t = xp->xfrm_vec + i;
9e8b4ed8 1970 socklen += pfkey_sockaddr_len(t->encap_family);
2718aa7c 1971 }
1da177e4
LT		 1972
1973 return sizeof(struct sadb_msg) +
1974 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 1975 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 1976 (sockaddr_size * 2) +
1977 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 1978 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1979 (socklen * 2) +
df71837d 1980 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 1981}
1982
4c93fbb0 1983static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1da177e4
LT		 1984{
1985 struct sk_buff *skb;
1986 int size;
1987
1988 size = pfkey_xfrm_policy2msg_size(xp);
1989
1990 skb = alloc_skb(size + 16, GFP_ATOMIC);
1991 if (skb == NULL)
1992 return ERR_PTR(-ENOBUFS);
1993
1994 return skb;
1995}
1996
4c93fbb0 1997static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
1da177e4
LT		 1998{
1999 struct sadb_msg *hdr;
2000 struct sadb_address *addr;
2001 struct sadb_lifetime *lifetime;
2002 struct sadb_x_policy *pol;
df71837d
TJ		 2003 struct sadb_x_sec_ctx *sec_ctx;
2004 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 2005 int i;
2006 int size;
2007 int sockaddr_size = pfkey_sockaddr_size(xp->family);
9e8b4ed8 2008 int socklen = pfkey_sockaddr_len(xp->family);
1da177e4
LT		 2009
2010 size = pfkey_xfrm_policy2msg_size(xp);
2011
2012 /* call should fill header later */
2013 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2014 memset(hdr, 0, size); /* XXX do we need this ? */
2015
2016 /* src address */
8ff24541 2017 addr = (struct sadb_address*) skb_put(skb,
1da177e4 2018 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 2019 addr->sadb_address_len =
1da177e4
LT		 2020 (sizeof(struct sadb_address)+sockaddr_size)/
2021 sizeof(uint64_t);
2022 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2023 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2024 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2025 addr->sadb_address_reserved = 0;
e5b56652
YH		 2026 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2027 xp->selector.sport,
2028 (struct sockaddr *) (addr + 1),
2029 xp->family))
1da177e4
LT		 2030 BUG();
2031
2032 /* dst address */
8ff24541 2033 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 2034 sizeof(struct sadb_address)+sockaddr_size);
2035 addr->sadb_address_len =
2036 (sizeof(struct sadb_address)+sockaddr_size)/
2037 sizeof(uint64_t);
2038 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2039 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2040 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4 2041 addr->sadb_address_reserved = 0;
e5b56652
YH		 2042
2043 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2044 (struct sockaddr *) (addr + 1),
2045 xp->family);
1da177e4
LT		 2046
2047 /* hard time */
8ff24541 2048 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2049 sizeof(struct sadb_lifetime));
2050 lifetime->sadb_lifetime_len =
2051 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2052 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2053 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2054 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2055 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2056 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2057 /* soft time */
8ff24541 2058 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2059 sizeof(struct sadb_lifetime));
2060 lifetime->sadb_lifetime_len =
2061 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2062 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2063 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2064 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2065 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2066 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2067 /* current time */
8ff24541 2068 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2069 sizeof(struct sadb_lifetime));
2070 lifetime->sadb_lifetime_len =
2071 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2072 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2073 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2074 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2075 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2076 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2077
2078 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2079 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2080 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2081 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2082 if (xp->action == XFRM_POLICY_ALLOW) {
2083 if (xp->xfrm_nr)
2084 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2085 else
2086 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2087 }
2088 pol->sadb_x_policy_dir = dir+1;
ff862a46 2089 pol->sadb_x_policy_reserved = 0;
1da177e4
LT		 2090 pol->sadb_x_policy_id = xp->index;
2091 pol->sadb_x_policy_priority = xp->priority;
2092
2093 for (i=0; i<xp->xfrm_nr; i++) {
4c93fbb0 2094 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
1da177e4 2095 struct sadb_x_ipsecrequest *rq;
1da177e4 2096 int req_size;
55569ce2 2097 int mode;
1da177e4
LT		 2098
2099 req_size = sizeof(struct sadb_x_ipsecrequest);
e5b56652
YH		 2100 if (t->mode == XFRM_MODE_TUNNEL) {
2101 socklen = pfkey_sockaddr_len(t->encap_family);
2102 req_size += socklen * 2;
2103 } else {
1da177e4 2104 size -= 2*socklen;
e5b56652 2105 }
1da177e4
LT		 2106 rq = (void*)skb_put(skb, req_size);
2107 pol->sadb_x_policy_len += req_size/8;
2108 memset(rq, 0, sizeof(*rq));
2109 rq->sadb_x_ipsecrequest_len = req_size;
2110 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2111 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2112 return -EINVAL;
fefaa75e 2113 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2114 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2115 if (t->reqid)
2116 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2117 if (t->optional)
2118 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2119 rq->sadb_x_ipsecrequest_reqid = t->reqid;
e5b56652 2120
7e49e6de 2121 if (t->mode == XFRM_MODE_TUNNEL) {
e5b56652
YH		 2122 u8 *sa = (void *)(rq + 1);
2123 pfkey_sockaddr_fill(&t->saddr, 0,
2124 (struct sockaddr *)sa,
2125 t->encap_family);
2126 pfkey_sockaddr_fill(&t->id.daddr, 0,
2127 (struct sockaddr *) (sa + socklen),
2128 t->encap_family);
1da177e4
LT		 2129 }
2130 }
df71837d
TJ		 2131
2132 /* security context */
2133 if ((xfrm_ctx = xp->security)) {
2134 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2135
2136 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2137 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2138 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2139 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2140 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2141 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2142 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2143 xfrm_ctx->ctx_len);
2144 }
2145
1da177e4
LT		 2146 hdr->sadb_msg_len = size / sizeof(uint64_t);
2147 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
55569ce2
KM		 2148
2149 return 0;
1da177e4
LT		 2150}
2151
214e005b 2152static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2153{
2154 struct sk_buff *out_skb;
2155 struct sadb_msg *out_hdr;
2156 int err;
2157
2158 out_skb = pfkey_xfrm_policy2msg_prep(xp);
9a127aad
DC		 2159 if (IS_ERR(out_skb))
2160 return PTR_ERR(out_skb);
2161
55569ce2
KM		 2162 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2163 if (err < 0)
2164 return err;
26b15dad
JHS		 2165
2166 out_hdr = (struct sadb_msg *) out_skb->data;
2167 out_hdr->sadb_msg_version = PF_KEY_V2;
2168
f60f6b8f 2169 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2170 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2171 else
2172 out_hdr->sadb_msg_type = event2poltype(c->event);
2173 out_hdr->sadb_msg_errno = 0;
2174 out_hdr->sadb_msg_seq = c->seq;
15e47304 2175 out_hdr->sadb_msg_pid = c->portid;
07fb0f17 2176 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
26b15dad
JHS		 2177 return 0;
2178
2179}
2180
4c93fbb0 2181static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2182{
07fb0f17 2183 struct net *net = sock_net(sk);
df71837d 2184 int err = 0;
1da177e4
LT		 2185 struct sadb_lifetime *lifetime;
2186 struct sadb_address *sa;
2187 struct sadb_x_policy *pol;
2188 struct xfrm_policy *xp;
26b15dad 2189 struct km_event c;
df71837d 2190 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2191
2192 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2193 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2194 !ext_hdrs[SADB_X_EXT_POLICY-1])
2195 return -EINVAL;
2196
2197 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2198 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2199 return -EINVAL;
2200 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2201 return -EINVAL;
2202
07fb0f17 2203 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2204 if (xp == NULL)
2205 return -ENOBUFS;
2206
2207 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2208 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2209 xp->priority = pol->sadb_x_policy_priority;
2210
d0d79c3f 2211 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4 2212 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
1da177e4
LT		 2213 xp->selector.family = xp->family;
2214 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2215 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2216 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2217 if (xp->selector.sport)
8f83f23e 2218 xp->selector.sport_mask = htons(0xffff);
1da177e4 2219
d0d79c3f 2220 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2221 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2222 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2223
2224 /* Amusing, we set this twice. KAME apps appear to set same value
2225 * in both addresses.
2226 */
2227 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2228
2229 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2230 if (xp->selector.dport)
8f83f23e 2231 xp->selector.dport_mask = htons(0xffff);
1da177e4 2232
ea110733 2233 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2234 if (sec_ctx != NULL) {
87536a81 2235 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2236
2237 if (!uctx) {
2238 err = -ENOBUFS;
2239 goto out;
2240 }
2241
52a4c640 2242 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
df71837d
TJ		 2243 kfree(uctx);
2244
2245 if (err)
2246 goto out;
2247 }
2248
1da177e4
LT		 2249 xp->lft.soft_byte_limit = XFRM_INF;
2250 xp->lft.hard_byte_limit = XFRM_INF;
2251 xp->lft.soft_packet_limit = XFRM_INF;
2252 xp->lft.hard_packet_limit = XFRM_INF;
2253 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2254 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2255 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2256 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2257 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2258 }
2259 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2260 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2261 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2262 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2263 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2264 }
2265 xp->xfrm_nr = 0;
2266 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2267 (err = parse_ipsecrequests(xp, pol)) < 0)
2268 goto out;
2269
1da177e4
LT		 2270 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2271 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2272
ab5f5e8b 2273 xfrm_audit_policy_add(xp, err ? 0 : 1,
2532386f
EP		 2274 audit_get_loginuid(current),
2275 audit_get_sessionid(current), 0);
161a09e7 2276
df71837d
TJ		 2277 if (err)
2278 goto out;
1da177e4 2279
26b15dad 2280 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2281 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2282 else
f60f6b8f 2283 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2284
26b15dad 2285 c.seq = hdr->sadb_msg_seq;
15e47304 2286 c.portid = hdr->sadb_msg_pid;
1da177e4 2287
26b15dad
JHS		 2288 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2289 xfrm_pol_put(xp);
1da177e4
LT		 2290 return 0;
2291
2292out:
12a169e7 2293 xp->walk.dead = 1;
64c31b3f 2294 xfrm_policy_destroy(xp);
1da177e4
LT		 2295 return err;
2296}
2297
4c93fbb0 2298static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2299{
07fb0f17 2300 struct net *net = sock_net(sk);
1da177e4
LT		 2301 int err;
2302 struct sadb_address *sa;
2303 struct sadb_x_policy *pol;
03e1ad7b 2304 struct xfrm_policy *xp;
1da177e4 2305 struct xfrm_selector sel;
26b15dad 2306 struct km_event c;
df71837d 2307 struct sadb_x_sec_ctx *sec_ctx;
2db3e47e 2308 struct xfrm_sec_ctx *pol_ctx = NULL;
1da177e4
LT		 2309
2310 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2311 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2312 !ext_hdrs[SADB_X_EXT_POLICY-1])
2313 return -EINVAL;
2314
2315 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2316 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2317 return -EINVAL;
2318
2319 memset(&sel, 0, sizeof(sel));
2320
d0d79c3f 2321 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4
LT		 2322 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2323 sel.prefixlen_s = sa->sadb_address_prefixlen;
2324 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2325 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2326 if (sel.sport)
8f83f23e 2327 sel.sport_mask = htons(0xffff);
1da177e4 2328
d0d79c3f 2329 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2330 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2331 sel.prefixlen_d = sa->sadb_address_prefixlen;
2332 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2333 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2334 if (sel.dport)
8f83f23e 2335 sel.dport_mask = htons(0xffff);
1da177e4 2336
ea110733 2337 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2338 if (sec_ctx != NULL) {
87536a81 2339 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2340
2341 if (!uctx)
2342 return -ENOMEM;
2343
52a4c640 2344 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
df71837d 2345 kfree(uctx);
df71837d
TJ		 2346 if (err)
2347 return err;
2db3e47e 2348 }
161a09e7 2349
8ca2e93b 2350 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
03e1ad7b
PM		 2351 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2352 1, &err);
2353 security_xfrm_policy_free(pol_ctx);
1da177e4
LT		 2354 if (xp == NULL)
2355 return -ENOENT;
2356
ab5f5e8b 2357 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2358 audit_get_loginuid(current),
2359 audit_get_sessionid(current), 0);
13fcfbb0
DM		 2360
2361 if (err)
c8c05a8e 2362 goto out;
13fcfbb0 2363
26b15dad 2364 c.seq = hdr->sadb_msg_seq;
15e47304 2365 c.portid = hdr->sadb_msg_pid;
1839faab 2366 c.data.byid = 0;
f60f6b8f 2367 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2368 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2369
c8c05a8e 2370out:
26b15dad 2371 xfrm_pol_put(xp);
e4c17216
PM		 2372 if (err == 0)
2373 xfrm_garbage_collect(net);
26b15dad
JHS		 2374 return err;
2375}
2376
4c93fbb0 2377static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
26b15dad
JHS		 2378{
2379 int err;
2380 struct sk_buff *out_skb;
2381 struct sadb_msg *out_hdr;
2382 err = 0;
2383
1da177e4
LT		 2384 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2385 if (IS_ERR(out_skb)) {
2386 err = PTR_ERR(out_skb);
2387 goto out;
2388 }
55569ce2
KM		 2389 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2390 if (err < 0)
2391 goto out;
1da177e4
LT		 2392
2393 out_hdr = (struct sadb_msg *) out_skb->data;
2394 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2395 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2396 out_hdr->sadb_msg_satype = 0;
2397 out_hdr->sadb_msg_errno = 0;
2398 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2399 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
07fb0f17 2400 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
1da177e4
LT		 2401 err = 0;
2402
2403out:
1da177e4
LT		 2404 return err;
2405}
2406
08de61be
SS		 2407#ifdef CONFIG_NET_KEY_MIGRATE
2408static int pfkey_sockaddr_pair_size(sa_family_t family)
2409{
9e8b4ed8 2410 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
08de61be
SS		 2411}
2412
13c1d189 2413static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
08de61be
SS		 2414 xfrm_address_t *saddr, xfrm_address_t *daddr,
2415 u16 *family)
2416{
5f95ac91
YH		 2417 int af, socklen;
2418
13c1d189 2419 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
08de61be
SS		 2420 return -EINVAL;
2421
13c1d189 2422 af = pfkey_sockaddr_extract(sa, saddr);
5f95ac91
YH		 2423 if (!af)
2424 return -EINVAL;
2425
2426 socklen = pfkey_sockaddr_len(af);
13c1d189 2427 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
5f95ac91 2428 daddr) != af)
08de61be 2429 return -EINVAL;
08de61be 2430
5f95ac91 2431 *family = af;
08de61be
SS		 2432 return 0;
2433}
2434
2435static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2436 struct xfrm_migrate *m)
2437{
2438 int err;
2439 struct sadb_x_ipsecrequest *rq2;
55569ce2 2440 int mode;
08de61be
SS		 2441
2442 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2443 len < rq1->sadb_x_ipsecrequest_len)
2444 return -EINVAL;
2445
2446 /* old endoints */
13c1d189
AE		 2447 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2448 rq1->sadb_x_ipsecrequest_len,
2449 &m->old_saddr, &m->old_daddr,
08de61be
SS		 2450 &m->old_family);
2451 if (err)
2452 return err;
2453
2454 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2455 len -= rq1->sadb_x_ipsecrequest_len;
2456
2457 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2458 len < rq2->sadb_x_ipsecrequest_len)
2459 return -EINVAL;
2460
2461 /* new endpoints */
13c1d189
AE		 2462 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2463 rq2->sadb_x_ipsecrequest_len,
2464 &m->new_saddr, &m->new_daddr,
08de61be
SS		 2465 &m->new_family);
2466 if (err)
2467 return err;
2468
2469 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2470 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2471 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2472 return -EINVAL;
2473
2474 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2475 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2476 return -EINVAL;
2477 m->mode = mode;
08de61be
SS		 2478 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2479
2480 return ((int)(rq1->sadb_x_ipsecrequest_len +
2481 rq2->sadb_x_ipsecrequest_len));
2482}
2483
2484static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2485 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2486{
2487 int i, len, ret, err = -EINVAL;
2488 u8 dir;
2489 struct sadb_address *sa;
13c1d189 2490 struct sadb_x_kmaddress *kma;
08de61be
SS		 2491 struct sadb_x_policy *pol;
2492 struct sadb_x_ipsecrequest *rq;
2493 struct xfrm_selector sel;
2494 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2495 struct xfrm_kmaddress k;
8d549c4f 2496 struct net *net = sock_net(sk);
08de61be
SS		 2497
2498 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
13c1d189 2499 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
08de61be
SS		 2500 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2501 err = -EINVAL;
2502 goto out;
2503 }
2504
13c1d189 2505 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
08de61be 2506 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
08de61be
SS		 2507
2508 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2509 err = -EINVAL;
2510 goto out;
2511 }
2512
13c1d189
AE		 2513 if (kma) {
2514 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2515 k.reserved = kma->sadb_x_kmaddress_reserved;
2516 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2517 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2518 &k.local, &k.remote, &k.family);
2519 if (ret < 0) {
2520 err = ret;
2521 goto out;
2522 }
2523 }
2524
08de61be
SS		 2525 dir = pol->sadb_x_policy_dir - 1;
2526 memset(&sel, 0, sizeof(sel));
2527
2528 /* set source address info of selector */
2529 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2530 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2531 sel.prefixlen_s = sa->sadb_address_prefixlen;
2532 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2533 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2534 if (sel.sport)
582ee43d 2535 sel.sport_mask = htons(0xffff);
08de61be
SS		 2536
2537 /* set destination address info of selector */
2538 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2539 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2540 sel.prefixlen_d = sa->sadb_address_prefixlen;
2541 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2542 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2543 if (sel.dport)
582ee43d 2544 sel.dport_mask = htons(0xffff);
08de61be
SS		 2545
2546 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2547
2548 /* extract ipsecrequests */
2549 i = 0;
2550 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2551
2552 while (len > 0 && i < XFRM_MAX_DEPTH) {
2553 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2554 if (ret < 0) {
2555 err = ret;
2556 goto out;
2557 } else {
2558 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2559 len -= ret;
2560 i++;
2561 }
2562 }
2563
2564 if (!i || len > 0) {
2565 err = -EINVAL;
2566 goto out;
2567 }
2568
13c1d189 2569 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
8d549c4f 2570 kma ? &k : NULL, net);
08de61be
SS		 2571
2572 out:
2573 return err;
2574}
2575#else
2576static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
7f6daa63 2577 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2578{
2579 return -ENOPROTOOPT;
2580}
2581#endif
2582
2583
4c93fbb0 2584static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2585{
07fb0f17 2586 struct net *net = sock_net(sk);
77d8d7a6 2587 unsigned int dir;
215a2dd3 2588 int err = 0, delete;
1da177e4
LT		 2589 struct sadb_x_policy *pol;
2590 struct xfrm_policy *xp;
26b15dad 2591 struct km_event c;
1da177e4
LT		 2592
2593 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2594 return -EINVAL;
2595
77d8d7a6
HX		 2596 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2597 if (dir >= XFRM_POLICY_MAX)
2598 return -EINVAL;
2599
215a2dd3 2600 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
8ca2e93b 2601 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
bd55775c 2602 dir, pol->sadb_x_policy_id, delete, &err);
1da177e4
LT		 2603 if (xp == NULL)
2604 return -ENOENT;
2605
215a2dd3 2606 if (delete) {
ab5f5e8b 2607 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2608 audit_get_loginuid(current),
2609 audit_get_sessionid(current), 0);
1da177e4 2610
215a2dd3
EP		 2611 if (err)
2612 goto out;
2613 c.seq = hdr->sadb_msg_seq;
15e47304 2614 c.portid = hdr->sadb_msg_pid;
bf08867f 2615 c.data.byid = 1;
f60f6b8f 2616 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2617 km_policy_notify(xp, dir, &c);
26b15dad 2618 } else {
77d8d7a6 2619 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2620 }
1da177e4 2621
215a2dd3 2622out:
1da177e4 2623 xfrm_pol_put(xp);
e4c17216
PM		 2624 if (delete && err == 0)
2625 xfrm_garbage_collect(net);
1da177e4
LT		 2626 return err;
2627}
2628
2629static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2630{
83321d6b 2631 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 2632 struct sk_buff *out_skb;
2633 struct sadb_msg *out_hdr;
55569ce2 2634 int err;
1da177e4 2635
83321d6b
TT		 2636 if (!pfkey_can_dump(&pfk->sk))
2637 return -ENOBUFS;
2638
1da177e4
LT		 2639 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2640 if (IS_ERR(out_skb))
2641 return PTR_ERR(out_skb);
2642
55569ce2
KM		 2643 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2644 if (err < 0)
2645 return err;
1da177e4
LT		 2646
2647 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 2648 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 2649 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2650 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2651 out_hdr->sadb_msg_errno = 0;
12a169e7 2652 out_hdr->sadb_msg_seq = count + 1;
15e47304 2653 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 2654
2655 if (pfk->dump.skb)
2656 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 2657 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 2658 pfk->dump.skb = out_skb;
2659
1da177e4
LT		 2660 return 0;
2661}
2662
83321d6b
TT		 2663static int pfkey_dump_sp(struct pfkey_sock *pfk)
2664{
07fb0f17
AD		 2665 struct net *net = sock_net(&pfk->sk);
2666 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
83321d6b
TT		 2667}
2668
2669static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2670{
283bc9f3
FD		 2671 struct net *net = sock_net((struct sock *)pfk);
2672
2673 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
83321d6b
TT		 2674}
2675
4c93fbb0 2676static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2677{
83321d6b 2678 struct pfkey_sock *pfk = pfkey_sk(sk);
4c563f76 2679
83321d6b
TT		 2680 if (pfk->dump.dump != NULL)
2681 return -EBUSY;
1da177e4 2682
83321d6b 2683 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 2684 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 2685 pfk->dump.dump = pfkey_dump_sp;
2686 pfk->dump.done = pfkey_dump_sp_done;
2687 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2688
2689 return pfkey_do_dump(pfk);
1da177e4
LT		 2690}
2691
214e005b 2692static int key_notify_policy_flush(const struct km_event *c)
1da177e4
LT		 2693{
2694 struct sk_buff *skb_out;
26b15dad 2695 struct sadb_msg *hdr;
1da177e4 2696
26b15dad 2697 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2698 if (!skb_out)
2699 return -ENOBUFS;
26b15dad 2700 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2701 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad 2702 hdr->sadb_msg_seq = c->seq;
15e47304 2703 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 2704 hdr->sadb_msg_version = PF_KEY_V2;
2705 hdr->sadb_msg_errno = (uint8_t) 0;
85dfb745 2706 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
26b15dad 2707 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 2708 hdr->sadb_msg_reserved = 0;
07fb0f17 2709 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad 2710 return 0;
1da177e4 2711
26b15dad
JHS		 2712}
2713
4c93fbb0 2714static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
26b15dad 2715{
07fb0f17 2716 struct net *net = sock_net(sk);
26b15dad 2717 struct km_event c;
161a09e7 2718 struct xfrm_audit audit_info;
8be987d7 2719 int err, err2;
1da177e4 2720
0c11b942 2721 audit_info.loginuid = audit_get_loginuid(current);
2532386f 2722 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 2723 audit_info.secid = 0;
07fb0f17 2724 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
8be987d7 2725 err2 = unicast_flush_resp(sk, hdr);
2f1eb65f
JHS		 2726 if (err || err2) {
2727 if (err == -ESRCH) /* empty table - old silent behavior */
2728 return 0;
2729 return err;
2730 }
8be987d7 2731
f7b6983f 2732 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2733 c.event = XFRM_MSG_FLUSHPOLICY;
15e47304 2734 c.portid = hdr->sadb_msg_pid;
26b15dad 2735 c.seq = hdr->sadb_msg_seq;
07fb0f17 2736 c.net = net;
26b15dad 2737 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2738
2739 return 0;
2740}
2741
2742typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2743 const struct sadb_msg *hdr, void * const *ext_hdrs);
8603b955 2744static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
1da177e4
LT		 2745 [SADB_RESERVED] = pfkey_reserved,
2746 [SADB_GETSPI] = pfkey_getspi,
2747 [SADB_UPDATE] = pfkey_add,
2748 [SADB_ADD] = pfkey_add,
2749 [SADB_DELETE] = pfkey_delete,
2750 [SADB_GET] = pfkey_get,
2751 [SADB_ACQUIRE] = pfkey_acquire,
2752 [SADB_REGISTER] = pfkey_register,
2753 [SADB_EXPIRE] = NULL,
2754 [SADB_FLUSH] = pfkey_flush,
2755 [SADB_DUMP] = pfkey_dump,
2756 [SADB_X_PROMISC] = pfkey_promisc,
2757 [SADB_X_PCHANGE] = NULL,
2758 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2759 [SADB_X_SPDADD] = pfkey_spdadd,
2760 [SADB_X_SPDDELETE] = pfkey_spddelete,
2761 [SADB_X_SPDGET] = pfkey_spdget,
2762 [SADB_X_SPDACQUIRE] = NULL,
2763 [SADB_X_SPDDUMP] = pfkey_spddump,
2764 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2765 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2766 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2767 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2768};
2769
4c93fbb0 2770static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
1da177e4
LT		 2771{
2772 void *ext_hdrs[SADB_EXT_MAX];
2773 int err;
2774
2775 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
07fb0f17 2776 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
1da177e4
LT		 2777
2778 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2779 err = parse_exthdrs(skb, hdr, ext_hdrs);
2780 if (!err) {
2781 err = -EOPNOTSUPP;
2782 if (pfkey_funcs[hdr->sadb_msg_type])
2783 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2784 }
2785 return err;
2786}
2787
2788static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2789{
2790 struct sadb_msg *hdr = NULL;
2791
2792 if (skb->len < sizeof(*hdr)) {
2793 *errp = -EMSGSIZE;
2794 } else {
2795 hdr = (struct sadb_msg *) skb->data;
2796 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2797 hdr->sadb_msg_reserved != 0 ||
2798 (hdr->sadb_msg_type <= SADB_RESERVED ||
2799 hdr->sadb_msg_type > SADB_MAX)) {
2800 hdr = NULL;
2801 *errp = -EINVAL;
2802 } else if (hdr->sadb_msg_len != (skb->len /
2803 sizeof(uint64_t)) ||
2804 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2805 sizeof(uint64_t))) {
2806 hdr = NULL;
2807 *errp = -EMSGSIZE;
2808 } else {
2809 *errp = 0;
2810 }
2811 }
2812 return hdr;
2813}
2814
4c93fbb0
DM		 2815static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2816 const struct xfrm_algo_desc *d)
1da177e4 2817{
f398035f
HX		 2818 unsigned int id = d->desc.sadb_alg_id;
2819
2820 if (id >= sizeof(t->aalgos) * 8)
2821 return 0;
2822
2823 return (t->aalgos >> id) & 1;
1da177e4
LT		 2824}
2825
4c93fbb0
DM		 2826static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2827 const struct xfrm_algo_desc *d)
1da177e4 2828{
f398035f
HX		 2829 unsigned int id = d->desc.sadb_alg_id;
2830
2831 if (id >= sizeof(t->ealgos) * 8)
2832 return 0;
2833
2834 return (t->ealgos >> id) & 1;
1da177e4
LT		 2835}
2836
4c93fbb0 2837static int count_ah_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2838{
2839 int i, sz = 0;
2840
2841 for (i = 0; ; i++) {
4c93fbb0 2842 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2843 if (!aalg)
2844 break;
7e50f84c
JK		 2845 if (!aalg->pfkey_supported)
2846 continue;
1da177e4
LT		 2847 if (aalg_tmpl_set(t, aalg) && aalg->available)
2848 sz += sizeof(struct sadb_comb);
2849 }
2850 return sz + sizeof(struct sadb_prop);
2851}
2852
4c93fbb0 2853static int count_esp_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2854{
2855 int i, k, sz = 0;
2856
2857 for (i = 0; ; i++) {
4c93fbb0 2858 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2859 if (!ealg)
2860 break;
8ff24541 2861
7e50f84c
JK		 2862 if (!ealg->pfkey_supported)
2863 continue;
2864
1da177e4
LT		 2865 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2866 continue;
8ff24541 2867
1da177e4 2868 for (k = 1; ; k++) {
4c93fbb0 2869 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2870 if (!aalg)
2871 break;
8ff24541 2872
7e50f84c
JK		 2873 if (!aalg->pfkey_supported)
2874 continue;
2875
1da177e4
LT		 2876 if (aalg_tmpl_set(t, aalg) && aalg->available)
2877 sz += sizeof(struct sadb_comb);
2878 }
2879 }
2880 return sz + sizeof(struct sadb_prop);
2881}
2882
4c93fbb0 2883static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2884{
2885 struct sadb_prop *p;
2886 int i;
2887
2888 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2889 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2890 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2891 p->sadb_prop_replay = 32;
2892 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2893
2894 for (i = 0; ; i++) {
4c93fbb0 2895 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2896 if (!aalg)
2897 break;
2898
7e50f84c
JK		 2899 if (!aalg->pfkey_supported)
2900 continue;
2901
1da177e4
LT		 2902 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2903 struct sadb_comb *c;
2904 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2905 memset(c, 0, sizeof(*c));
2906 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2907 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2908 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2909 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2910 c->sadb_comb_hard_addtime = 24*60*60;
2911 c->sadb_comb_soft_addtime = 20*60*60;
2912 c->sadb_comb_hard_usetime = 8*60*60;
2913 c->sadb_comb_soft_usetime = 7*60*60;
2914 }
2915 }
2916}
2917
4c93fbb0 2918static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2919{
2920 struct sadb_prop *p;
2921 int i, k;
2922
2923 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2924 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2925 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2926 p->sadb_prop_replay = 32;
2927 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2928
2929 for (i=0; ; i++) {
4c93fbb0 2930 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2931 if (!ealg)
2932 break;
8ff24541 2933
7e50f84c
JK		 2934 if (!ealg->pfkey_supported)
2935 continue;
2936
1da177e4
LT		 2937 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2938 continue;
8ff24541 2939
1da177e4
LT		 2940 for (k = 1; ; k++) {
2941 struct sadb_comb *c;
4c93fbb0 2942 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2943 if (!aalg)
2944 break;
7e50f84c
JK		 2945 if (!aalg->pfkey_supported)
2946 continue;
1da177e4
LT		 2947 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2948 continue;
2949 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2950 memset(c, 0, sizeof(*c));
2951 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2952 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2953 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2954 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2955 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2956 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2957 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2958 c->sadb_comb_hard_addtime = 24*60*60;
2959 c->sadb_comb_soft_addtime = 20*60*60;
2960 c->sadb_comb_hard_usetime = 8*60*60;
2961 c->sadb_comb_soft_usetime = 7*60*60;
2962 }
2963 }
2964}
2965
214e005b 2966static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
26b15dad
JHS		 2967{
2968 return 0;
2969}
2970
214e005b 2971static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2972{
2973 struct sk_buff *out_skb;
2974 struct sadb_msg *out_hdr;
26b15dad
JHS		 2975 int hard;
2976 int hsc;
2977
bf08867f 2978 hard = c->data.hard;
26b15dad
JHS		 2979 if (hard)
2980 hsc = 2;
2981 else
2982 hsc = 1;
1da177e4 2983
050f009e 2984 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 2985 if (IS_ERR(out_skb))
2986 return PTR_ERR(out_skb);
2987
2988 out_hdr = (struct sadb_msg *) out_skb->data;
2989 out_hdr->sadb_msg_version = PF_KEY_V2;
2990 out_hdr->sadb_msg_type = SADB_EXPIRE;
2991 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2992 out_hdr->sadb_msg_errno = 0;
2993 out_hdr->sadb_msg_reserved = 0;
2994 out_hdr->sadb_msg_seq = 0;
2995 out_hdr->sadb_msg_pid = 0;
2996
07fb0f17 2997 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 2998 return 0;
2999}
3000
214e005b 3001static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad 3002{
07fb0f17 3003 struct net *net = x ? xs_net(x) : c->net;
3fa87a32
AD		 3004 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3005
3006 if (atomic_read(&net_pfkey->socks_nr) == 0)
99c6f60e
JHS		 3007 return 0;
3008
26b15dad 3009 switch (c->event) {
f60f6b8f 3010 case XFRM_MSG_EXPIRE:
26b15dad 3011 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 3012 case XFRM_MSG_DELSA:
3013 case XFRM_MSG_NEWSA:
3014 case XFRM_MSG_UPDSA:
26b15dad 3015 return key_notify_sa(x, c);
f60f6b8f 3016 case XFRM_MSG_FLUSHSA:
26b15dad 3017 return key_notify_sa_flush(c);
d51d081d
JHS		 3018 case XFRM_MSG_NEWAE: /* not yet supported */
3019 break;
26b15dad 3020 default:
207024b9 3021 pr_err("pfkey: Unknown SA event %d\n", c->event);
26b15dad
JHS		 3022 break;
3023 }
3024
3025 return 0;
3026}
3027
214e005b 3028static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 3029{
f7b6983f
MN		 3030 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3031 return 0;
3032
26b15dad 3033 switch (c->event) {
f60f6b8f 3034 case XFRM_MSG_POLEXPIRE:
26b15dad 3035 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 3036 case XFRM_MSG_DELPOLICY:
3037 case XFRM_MSG_NEWPOLICY:
3038 case XFRM_MSG_UPDPOLICY:
26b15dad 3039 return key_notify_policy(xp, dir, c);
f60f6b8f 3040 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 3041 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3042 break;
26b15dad
JHS		 3043 return key_notify_policy_flush(c);
3044 default:
207024b9 3045 pr_err("pfkey: Unknown policy event %d\n", c->event);
26b15dad
JHS		 3046 break;
3047 }
3048
3049 return 0;
3050}
3051
1da177e4
LT		 3052static u32 get_acqseq(void)
3053{
3054 u32 res;
28aecb9d 3055 static atomic_t acqseq;
1da177e4 3056
28aecb9d
ED		 3057 do {
3058 res = atomic_inc_return(&acqseq);
3059 } while (!res);
1da177e4
LT		 3060 return res;
3061}
3062
65e0736b 3063static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
1da177e4
LT		 3064{
3065 struct sk_buff *skb;
3066 struct sadb_msg *hdr;
3067 struct sadb_address *addr;
3068 struct sadb_x_policy *pol;
1da177e4
LT		 3069 int sockaddr_size;
3070 int size;
4e2ba18e
VY		 3071 struct sadb_x_sec_ctx *sec_ctx;
3072 struct xfrm_sec_ctx *xfrm_ctx;
3073 int ctx_size = 0;
8ff24541 3074
1da177e4
LT		 3075 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3076 if (!sockaddr_size)
3077 return -EINVAL;
3078
3079 size = sizeof(struct sadb_msg) +
3080 (sizeof(struct sadb_address) * 2) +
3081 (sockaddr_size * 2) +
3082 sizeof(struct sadb_x_policy);
8ff24541 3083
1da177e4
LT		 3084 if (x->id.proto == IPPROTO_AH)
3085 size += count_ah_combs(t);
3086 else if (x->id.proto == IPPROTO_ESP)
3087 size += count_esp_combs(t);
3088
4e2ba18e
VY		 3089 if ((xfrm_ctx = x->security)) {
3090 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3091 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3092 }
3093
1da177e4
LT		 3094 skb = alloc_skb(size + 16, GFP_ATOMIC);
3095 if (skb == NULL)
3096 return -ENOMEM;
8ff24541 3097
1da177e4
LT		 3098 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3099 hdr->sadb_msg_version = PF_KEY_V2;
3100 hdr->sadb_msg_type = SADB_ACQUIRE;
3101 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3102 hdr->sadb_msg_len = size / sizeof(uint64_t);
3103 hdr->sadb_msg_errno = 0;
3104 hdr->sadb_msg_reserved = 0;
3105 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3106 hdr->sadb_msg_pid = 0;
3107
3108 /* src address */
8ff24541 3109 addr = (struct sadb_address*) skb_put(skb,
1da177e4 3110 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3111 addr->sadb_address_len =
1da177e4
LT		 3112 (sizeof(struct sadb_address)+sockaddr_size)/
3113 sizeof(uint64_t);
3114 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3115 addr->sadb_address_proto = 0;
3116 addr->sadb_address_reserved = 0;
e5b56652
YH		 3117 addr->sadb_address_prefixlen =
3118 pfkey_sockaddr_fill(&x->props.saddr, 0,
3119 (struct sockaddr *) (addr + 1),
3120 x->props.family);
3121 if (!addr->sadb_address_prefixlen)
1da177e4 3122 BUG();
8ff24541 3123
1da177e4 3124 /* dst address */
8ff24541 3125 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 3126 sizeof(struct sadb_address)+sockaddr_size);
3127 addr->sadb_address_len =
3128 (sizeof(struct sadb_address)+sockaddr_size)/
3129 sizeof(uint64_t);
3130 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3131 addr->sadb_address_proto = 0;
3132 addr->sadb_address_reserved = 0;
e5b56652
YH		 3133 addr->sadb_address_prefixlen =
3134 pfkey_sockaddr_fill(&x->id.daddr, 0,
3135 (struct sockaddr *) (addr + 1),
3136 x->props.family);
3137 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3138 BUG();
3139
3140 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3141 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3142 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3143 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
65e0736b 3144 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
ff862a46 3145 pol->sadb_x_policy_reserved = 0;
1da177e4 3146 pol->sadb_x_policy_id = xp->index;
ff862a46 3147 pol->sadb_x_policy_priority = xp->priority;
1da177e4
LT		 3148
3149 /* Set sadb_comb's. */
3150 if (x->id.proto == IPPROTO_AH)
3151 dump_ah_combs(skb, t);
3152 else if (x->id.proto == IPPROTO_ESP)
3153 dump_esp_combs(skb, t);
3154
4e2ba18e
VY		 3155 /* security context */
3156 if (xfrm_ctx) {
3157 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3158 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3159 sec_ctx->sadb_x_sec_len =
3160 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3161 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3162 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3163 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3164 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3165 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3166 xfrm_ctx->ctx_len);
3167 }
3168
07fb0f17 3169 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3170}
3171
cb969f07 3172static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3173 u8 *data, int len, int *dir)
1da177e4 3174{
07fb0f17 3175 struct net *net = sock_net(sk);
1da177e4
LT		 3176 struct xfrm_policy *xp;
3177 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3178 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3179
cb969f07 3180 switch (sk->sk_family) {
1da177e4
LT		 3181 case AF_INET:
3182 if (opt != IP_IPSEC_POLICY) {
3183 *dir = -EOPNOTSUPP;
3184 return NULL;
3185 }
3186 break;
dfd56b8b 3187#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 3188 case AF_INET6:
3189 if (opt != IPV6_IPSEC_POLICY) {
3190 *dir = -EOPNOTSUPP;
3191 return NULL;
3192 }
3193 break;
3194#endif
3195 default:
3196 *dir = -EINVAL;
3197 return NULL;
3198 }
3199
3200 *dir = -EINVAL;
3201
3202 if (len < sizeof(struct sadb_x_policy) ||
3203 pol->sadb_x_policy_len*8 > len ||
3204 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3205 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3206 return NULL;
3207
07fb0f17 3208 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3209 if (xp == NULL) {
3210 *dir = -ENOBUFS;
3211 return NULL;
3212 }
3213
3214 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3215 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3216
3217 xp->lft.soft_byte_limit = XFRM_INF;
3218 xp->lft.hard_byte_limit = XFRM_INF;
3219 xp->lft.soft_packet_limit = XFRM_INF;
3220 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3221 xp->family = sk->sk_family;
1da177e4
LT		 3222
3223 xp->xfrm_nr = 0;
3224 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3225 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3226 goto out;
3227
df71837d
TJ		 3228 /* security context too */
3229 if (len >= (pol->sadb_x_policy_len*8 +
3230 sizeof(struct sadb_x_sec_ctx))) {
3231 char *p = (char *)pol;
3232 struct xfrm_user_sec_ctx *uctx;
3233
3234 p += pol->sadb_x_policy_len*8;
3235 sec_ctx = (struct sadb_x_sec_ctx *)p;
3236 if (len < pol->sadb_x_policy_len*8 +
cb969f07
VY		 3237 sec_ctx->sadb_x_sec_len) {
3238 *dir = -EINVAL;
df71837d 3239 goto out;
cb969f07 3240 }
df71837d
TJ		 3241 if ((*dir = verify_sec_ctx_len(p)))
3242 goto out;
87536a81 3243 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
52a4c640 3244 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
df71837d
TJ		 3245 kfree(uctx);
3246
3247 if (*dir)
3248 goto out;
3249 }
3250
1da177e4
LT		 3251 *dir = pol->sadb_x_policy_dir-1;
3252 return xp;
3253
3254out:
70e90679 3255 xp->walk.dead = 1;
64c31b3f 3256 xfrm_policy_destroy(xp);
1da177e4
LT		 3257 return NULL;
3258}
3259
5d36b180 3260static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3261{
3262 struct sk_buff *skb;
3263 struct sadb_msg *hdr;
3264 struct sadb_sa *sa;
3265 struct sadb_address *addr;
3266 struct sadb_x_nat_t_port *n_port;
1da177e4
LT		 3267 int sockaddr_size;
3268 int size;
3269 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3270 struct xfrm_encap_tmpl *natt = NULL;
3271
3272 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3273 if (!sockaddr_size)
3274 return -EINVAL;
3275
3276 if (!satype)
3277 return -EINVAL;
3278
3279 if (!x->encap)
3280 return -EINVAL;
3281
3282 natt = x->encap;
3283
3284 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3285 *
3286 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3287 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3288 */
8ff24541 3289
1da177e4
LT		 3290 size = sizeof(struct sadb_msg) +
3291 sizeof(struct sadb_sa) +
3292 (sizeof(struct sadb_address) * 2) +
3293 (sockaddr_size * 2) +
3294 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3295
1da177e4
LT		 3296 skb = alloc_skb(size + 16, GFP_ATOMIC);
3297 if (skb == NULL)
3298 return -ENOMEM;
8ff24541 3299
1da177e4
LT		 3300 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3301 hdr->sadb_msg_version = PF_KEY_V2;
3302 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3303 hdr->sadb_msg_satype = satype;
3304 hdr->sadb_msg_len = size / sizeof(uint64_t);
3305 hdr->sadb_msg_errno = 0;
3306 hdr->sadb_msg_reserved = 0;
3307 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3308 hdr->sadb_msg_pid = 0;
3309
3310 /* SA */
3311 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3312 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3313 sa->sadb_sa_exttype = SADB_EXT_SA;
3314 sa->sadb_sa_spi = x->id.spi;
3315 sa->sadb_sa_replay = 0;
3316 sa->sadb_sa_state = 0;
3317 sa->sadb_sa_auth = 0;
3318 sa->sadb_sa_encrypt = 0;
3319 sa->sadb_sa_flags = 0;
3320
3321 /* ADDRESS_SRC (old addr) */
3322 addr = (struct sadb_address*)
3323 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3324 addr->sadb_address_len =
1da177e4
LT		 3325 (sizeof(struct sadb_address)+sockaddr_size)/
3326 sizeof(uint64_t);
3327 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3328 addr->sadb_address_proto = 0;
3329 addr->sadb_address_reserved = 0;
e5b56652
YH		 3330 addr->sadb_address_prefixlen =
3331 pfkey_sockaddr_fill(&x->props.saddr, 0,
3332 (struct sockaddr *) (addr + 1),
3333 x->props.family);
3334 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3335 BUG();
3336
3337 /* NAT_T_SPORT (old port) */
3338 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3339 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3340 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3341 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3342 n_port->sadb_x_nat_t_port_reserved = 0;
3343
3344 /* ADDRESS_DST (new addr) */
3345 addr = (struct sadb_address*)
3346 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3347 addr->sadb_address_len =
1da177e4
LT		 3348 (sizeof(struct sadb_address)+sockaddr_size)/
3349 sizeof(uint64_t);
3350 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3351 addr->sadb_address_proto = 0;
3352 addr->sadb_address_reserved = 0;
e5b56652
YH		 3353 addr->sadb_address_prefixlen =
3354 pfkey_sockaddr_fill(ipaddr, 0,
3355 (struct sockaddr *) (addr + 1),
3356 x->props.family);
3357 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3358 BUG();
3359
3360 /* NAT_T_DPORT (new port) */
3361 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3362 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3363 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3364 n_port->sadb_x_nat_t_port_port = sport;
3365 n_port->sadb_x_nat_t_port_reserved = 0;
3366
07fb0f17 3367 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3368}
3369
08de61be
SS		 3370#ifdef CONFIG_NET_KEY_MIGRATE
3371static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
183cad12 3372 const struct xfrm_selector *sel)
08de61be
SS		 3373{
3374 struct sadb_address *addr;
08de61be
SS		 3375 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3376 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3377 addr->sadb_address_exttype = type;
3378 addr->sadb_address_proto = sel->proto;
3379 addr->sadb_address_reserved = 0;
3380
3381 switch (type) {
3382 case SADB_EXT_ADDRESS_SRC:
e5b56652
YH		 3383 addr->sadb_address_prefixlen = sel->prefixlen_s;
3384 pfkey_sockaddr_fill(&sel->saddr, 0,
3385 (struct sockaddr *)(addr + 1),
3386 sel->family);
08de61be
SS		 3387 break;
3388 case SADB_EXT_ADDRESS_DST:
e5b56652
YH		 3389 addr->sadb_address_prefixlen = sel->prefixlen_d;
3390 pfkey_sockaddr_fill(&sel->daddr, 0,
3391 (struct sockaddr *)(addr + 1),
3392 sel->family);
08de61be
SS		 3393 break;
3394 default:
3395 return -EINVAL;
3396 }
3397
3398 return 0;
3399}
3400
13c1d189 3401
183cad12 3402static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
13c1d189
AE		 3403{
3404 struct sadb_x_kmaddress *kma;
3405 u8 *sa;
3406 int family = k->family;
3407 int socklen = pfkey_sockaddr_len(family);
3408 int size_req;
3409
3410 size_req = (sizeof(struct sadb_x_kmaddress) +
3411 pfkey_sockaddr_pair_size(family));
3412
3413 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3414 memset(kma, 0, size_req);
3415 kma->sadb_x_kmaddress_len = size_req / 8;
3416 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3417 kma->sadb_x_kmaddress_reserved = k->reserved;
3418
3419 sa = (u8 *)(kma + 1);
3420 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3421 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3422 return -EINVAL;
3423
3424 return 0;
3425}
3426
08de61be
SS		 3427static int set_ipsecrequest(struct sk_buff *skb,
3428 uint8_t proto, uint8_t mode, int level,
3429 uint32_t reqid, uint8_t family,
183cad12 3430 const xfrm_address_t *src, const xfrm_address_t *dst)
08de61be
SS		 3431{
3432 struct sadb_x_ipsecrequest *rq;
e5b56652
YH		 3433 u8 *sa;
3434 int socklen = pfkey_sockaddr_len(family);
08de61be
SS		 3435 int size_req;
3436
3437 size_req = sizeof(struct sadb_x_ipsecrequest) +
3438 pfkey_sockaddr_pair_size(family);
3439
3440 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3441 memset(rq, 0, size_req);
3442 rq->sadb_x_ipsecrequest_len = size_req;
3443 rq->sadb_x_ipsecrequest_proto = proto;
3444 rq->sadb_x_ipsecrequest_mode = mode;
3445 rq->sadb_x_ipsecrequest_level = level;
3446 rq->sadb_x_ipsecrequest_reqid = reqid;
3447
e5b56652
YH		 3448 sa = (u8 *) (rq + 1);
3449 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3450 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
08de61be 3451 return -EINVAL;
08de61be
SS		 3452
3453 return 0;
3454}
3455#endif
3456
3457#ifdef CONFIG_NET_KEY_MIGRATE
183cad12
DM		 3458static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3459 const struct xfrm_migrate *m, int num_bundles,
3460 const struct xfrm_kmaddress *k)
08de61be
SS		 3461{
3462 int i;
3463 int sasize_sel;
3464 int size = 0;
3465 int size_pol = 0;
3466 struct sk_buff *skb;
3467 struct sadb_msg *hdr;
3468 struct sadb_x_policy *pol;
183cad12 3469 const struct xfrm_migrate *mp;
08de61be
SS		 3470
3471 if (type != XFRM_POLICY_TYPE_MAIN)
3472 return 0;
3473
3474 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3475 return -EINVAL;
3476
13c1d189
AE		 3477 if (k != NULL) {
3478 /* addresses for KM */
3479 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3480 pfkey_sockaddr_pair_size(k->family));
3481 }
3482
08de61be
SS		 3483 /* selector */
3484 sasize_sel = pfkey_sockaddr_size(sel->family);
3485 if (!sasize_sel)
3486 return -EINVAL;
3487 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3488
3489 /* policy info */
3490 size_pol += sizeof(struct sadb_x_policy);
3491
3492 /* ipsecrequests */
3493 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3494 /* old locator pair */
3495 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3496 pfkey_sockaddr_pair_size(mp->old_family);
3497 /* new locator pair */
3498 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3499 pfkey_sockaddr_pair_size(mp->new_family);
3500 }
3501
3502 size += sizeof(struct sadb_msg) + size_pol;
3503
3504 /* alloc buffer */
3505 skb = alloc_skb(size, GFP_ATOMIC);
3506 if (skb == NULL)
3507 return -ENOMEM;
3508
3509 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3510 hdr->sadb_msg_version = PF_KEY_V2;
3511 hdr->sadb_msg_type = SADB_X_MIGRATE;
3512 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3513 hdr->sadb_msg_len = size / 8;
3514 hdr->sadb_msg_errno = 0;
3515 hdr->sadb_msg_reserved = 0;
3516 hdr->sadb_msg_seq = 0;
3517 hdr->sadb_msg_pid = 0;
3518
13c1d189
AE		 3519 /* Addresses to be used by KM for negotiation, if ext is available */
3520 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
89eb06f1 3521 goto err;
13c1d189 3522
08de61be
SS		 3523 /* selector src */
3524 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3525
3526 /* selector dst */
3527 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3528
3529 /* policy information */
3530 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3531 pol->sadb_x_policy_len = size_pol / 8;
3532 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3533 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3534 pol->sadb_x_policy_dir = dir + 1;
ff862a46 3535 pol->sadb_x_policy_reserved = 0;
08de61be
SS		 3536 pol->sadb_x_policy_id = 0;
3537 pol->sadb_x_policy_priority = 0;
3538
3539 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3540 /* old ipsecrequest */
55569ce2
KM		 3541 int mode = pfkey_mode_from_xfrm(mp->mode);
3542 if (mode < 0)
d4782c32 3543 goto err;
55569ce2 3544 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3545 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3546 mp->reqid, mp->old_family,
d4782c32
PM		 3547 &mp->old_saddr, &mp->old_daddr) < 0)
3548 goto err;
08de61be
SS		 3549
3550 /* new ipsecrequest */
55569ce2 3551 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3552 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3553 mp->reqid, mp->new_family,
d4782c32
PM		 3554 &mp->new_saddr, &mp->new_daddr) < 0)
3555 goto err;
08de61be
SS		 3556 }
3557
3558 /* broadcast migrate message to sockets */
07fb0f17 3559 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
08de61be
SS		 3560
3561 return 0;
d4782c32
PM		 3562
3563err:
3564 kfree_skb(skb);
3565 return -EINVAL;
08de61be
SS		 3566}
3567#else
183cad12
DM		 3568static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3569 const struct xfrm_migrate *m, int num_bundles,
3570 const struct xfrm_kmaddress *k)
08de61be
SS		 3571{
3572 return -ENOPROTOOPT;
3573}
3574#endif
3575
1da177e4
LT		 3576static int pfkey_sendmsg(struct kiocb *kiocb,
3577 struct socket *sock, struct msghdr *msg, size_t len)
3578{
3579 struct sock *sk = sock->sk;
3580 struct sk_buff *skb = NULL;
3581 struct sadb_msg *hdr = NULL;
3582 int err;
283bc9f3 3583 struct net *net = sock_net(sk);
1da177e4
LT		 3584
3585 err = -EOPNOTSUPP;
3586 if (msg->msg_flags & MSG_OOB)
3587 goto out;
3588
3589 err = -EMSGSIZE;
95c96174 3590 if ((unsigned int)len > sk->sk_sndbuf - 32)
1da177e4
LT		 3591 goto out;
3592
3593 err = -ENOBUFS;
3594 skb = alloc_skb(len, GFP_KERNEL);
3595 if (skb == NULL)
3596 goto out;
3597
3598 err = -EFAULT;
3599 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3600 goto out;
3601
3602 hdr = pfkey_get_base_msg(skb, &err);
3603 if (!hdr)
3604 goto out;
3605
283bc9f3 3606 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
1da177e4 3607 err = pfkey_process(sk, skb, hdr);
283bc9f3 3608 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 3609
3610out:
3611 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3612 err = 0;
6f961068 3613 kfree_skb(skb);
1da177e4
LT		 3614
3615 return err ? : len;
3616}
3617
3618static int pfkey_recvmsg(struct kiocb *kiocb,
3619 struct socket *sock, struct msghdr *msg, size_t len,
3620 int flags)
3621{
3622 struct sock *sk = sock->sk;
83321d6b 3623 struct pfkey_sock *pfk = pfkey_sk(sk);
1da177e4
LT		 3624 struct sk_buff *skb;
3625 int copied, err;
3626
3627 err = -EINVAL;
3628 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3629 goto out;
3630
1da177e4
LT		 3631 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3632 if (skb == NULL)
3633 goto out;
3634
3635 copied = skb->len;
3636 if (copied > len) {
3637 msg->msg_flags |= MSG_TRUNC;
3638 copied = len;
3639 }
3640
badff6d0 3641 skb_reset_transport_header(skb);
1da177e4
LT		 3642 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3643 if (err)
3644 goto out_free;
3645
3b885787 3646 sock_recv_ts_and_drops(msg, sk, skb);
1da177e4
LT		 3647
3648 err = (flags & MSG_TRUNC) ? skb->len : copied;
3649
83321d6b
TT		 3650 if (pfk->dump.dump != NULL &&
3651 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3652 pfkey_do_dump(pfk);
3653
1da177e4
LT		 3654out_free:
3655 skb_free_datagram(sk, skb);
3656out:
3657 return err;
3658}
3659
90ddc4f0 3660static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3661 .family = PF_KEY,
3662 .owner = THIS_MODULE,
3663 /* Operations that make no sense on pfkey sockets. */
3664 .bind = sock_no_bind,
3665 .connect = sock_no_connect,
3666 .socketpair = sock_no_socketpair,
3667 .accept = sock_no_accept,
3668 .getname = sock_no_getname,
3669 .ioctl = sock_no_ioctl,
3670 .listen = sock_no_listen,
3671 .shutdown = sock_no_shutdown,
3672 .setsockopt = sock_no_setsockopt,
3673 .getsockopt = sock_no_getsockopt,
3674 .mmap = sock_no_mmap,
3675 .sendpage = sock_no_sendpage,
3676
3677 /* Now the operations that really occur. */
3678 .release = pfkey_release,
3679 .poll = datagram_poll,
3680 .sendmsg = pfkey_sendmsg,
3681 .recvmsg = pfkey_recvmsg,
3682};
3683
ec1b4cf7 3684static const struct net_proto_family pfkey_family_ops = {
1da177e4
LT		 3685 .family = PF_KEY,
3686 .create = pfkey_create,
3687 .owner = THIS_MODULE,
3688};
3689
3690#ifdef CONFIG_PROC_FS
bd2f7476 3691static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3692{
27b5b865 3693 struct sock *s = sk_entry(v);
1da177e4 3694
bd2f7476
PE		 3695 if (v == SEQ_START_TOKEN)
3696 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3697 else
71338aa7 3698 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4
LT		 3699 s,
3700 atomic_read(&s->sk_refcnt),
31e6d363
ED		 3701 sk_rmem_alloc_get(s),
3702 sk_wmem_alloc_get(s),
a7cb5a49 3703 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
1da177e4
LT		 3704 sock_i_ino(s)
3705 );
bd2f7476
PE		 3706 return 0;
3707}
3708
3709static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
ada440e3 3710 __acquires(rcu)
bd2f7476 3711{
7013ec30 3712 struct net *net = seq_file_net(f);
3fa87a32 3713 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 3714
7f6b9dbd 3715 rcu_read_lock();
3716 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
bd2f7476
PE		 3717}
3718
3719static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3720{
7013ec30 3721 struct net *net = seq_file_net(f);
3fa87a32
AD		 3722 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3723
7f6b9dbd 3724 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
bd2f7476 3725}
1da177e4 3726
bd2f7476 3727static void pfkey_seq_stop(struct seq_file *f, void *v)
ada440e3 3728 __releases(rcu)
bd2f7476 3729{
7f6b9dbd 3730 rcu_read_unlock();
bd2f7476 3731}
1da177e4 3732
98147d52 3733static const struct seq_operations pfkey_seq_ops = {
bd2f7476
PE		 3734 .start = pfkey_seq_start,
3735 .next = pfkey_seq_next,
3736 .stop = pfkey_seq_stop,
3737 .show = pfkey_seq_show,
3738};
1da177e4 3739
bd2f7476
PE		 3740static int pfkey_seq_open(struct inode *inode, struct file *file)
3741{
7013ec30
AD		 3742 return seq_open_net(inode, file, &pfkey_seq_ops,
3743 sizeof(struct seq_net_private));
1da177e4 3744}
61145aa1 3745
5ca1b998 3746static const struct file_operations pfkey_proc_ops = {
bd2f7476
PE		 3747 .open = pfkey_seq_open,
3748 .read = seq_read,
3749 .llseek = seq_lseek,
7013ec30 3750 .release = seq_release_net,
bd2f7476
PE		 3751};
3752
7013ec30 3753static int __net_init pfkey_init_proc(struct net *net)
61145aa1 3754{
bd2f7476
PE		 3755 struct proc_dir_entry *e;
3756
d4beaa66 3757 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
bd2f7476 3758 if (e == NULL)
61145aa1 3759 return -ENOMEM;
bd2f7476 3760
bd2f7476 3761 return 0;
61145aa1
PE		 3762}
3763
2c8c1e72 3764static void __net_exit pfkey_exit_proc(struct net *net)
61145aa1 3765{
ece31ffd 3766 remove_proc_entry("pfkey", net->proc_net);
61145aa1
PE		 3767}
3768#else
2c8c1e72 3769static inline int pfkey_init_proc(struct net *net)
61145aa1
PE		 3770{
3771 return 0;
3772}
3773
2c8c1e72 3774static inline void pfkey_exit_proc(struct net *net)
61145aa1
PE		 3775{
3776}
1da177e4
LT		 3777#endif
3778
3779static struct xfrm_mgr pfkeyv2_mgr =
3780{
3781 .id = "pfkeyv2",
3782 .notify = pfkey_send_notify,
3783 .acquire = pfkey_send_acquire,
3784 .compile_policy = pfkey_compile_policy,
3785 .new_mapping = pfkey_send_new_mapping,
26b15dad 3786 .notify_policy = pfkey_send_policy_notify,
08de61be 3787 .migrate = pfkey_send_migrate,
1da177e4
LT		 3788};
3789
3fa87a32
AD		 3790static int __net_init pfkey_net_init(struct net *net)
3791{
23c049ca 3792 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3fa87a32
AD		 3793 int rv;
3794
3fa87a32
AD		 3795 INIT_HLIST_HEAD(&net_pfkey->table);
3796 atomic_set(&net_pfkey->socks_nr, 0);
23c049ca 3797
7013ec30 3798 rv = pfkey_init_proc(net);
3fa87a32 3799
3fa87a32
AD		 3800 return rv;
3801}
3802
3803static void __net_exit pfkey_net_exit(struct net *net)
3804{
3805 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3806
7013ec30 3807 pfkey_exit_proc(net);
3fa87a32 3808 BUG_ON(!hlist_empty(&net_pfkey->table));
3fa87a32
AD		 3809}
3810
3811static struct pernet_operations pfkey_net_ops = {
3812 .init = pfkey_net_init,
3813 .exit = pfkey_net_exit,
23c049ca
EB		 3814 .id = &pfkey_net_id,
3815 .size = sizeof(struct netns_pfkey),
3fa87a32
AD		 3816};
3817
1da177e4
LT		 3818static void __exit ipsec_pfkey_exit(void)
3819{
3820 xfrm_unregister_km(&pfkeyv2_mgr);
1da177e4 3821 sock_unregister(PF_KEY);
180211b8 3822 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3823 proto_unregister(&key_proto);
3824}
3825
3826static int __init ipsec_pfkey_init(void)
3827{
3828 int err = proto_register(&key_proto, 0);
3829
3830 if (err != 0)
3831 goto out;
3832
180211b8 3833 err = register_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3834 if (err != 0)
3835 goto out_unregister_key_proto;
180211b8
AD		 3836 err = sock_register(&pfkey_family_ops);
3837 if (err != 0)
3838 goto out_unregister_pernet;
1da177e4
LT		 3839 err = xfrm_register_km(&pfkeyv2_mgr);
3840 if (err != 0)
7013ec30 3841 goto out_sock_unregister;
1da177e4
LT		 3842out:
3843 return err;
180211b8 3844
1da177e4 3845out_sock_unregister:
1da177e4 3846 sock_unregister(PF_KEY);
180211b8
AD		 3847out_unregister_pernet:
3848 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3849out_unregister_key_proto:
3850 proto_unregister(&key_proto);
3851 goto out;
3852}
3853
3854module_init(ipsec_pfkey_init);
3855module_exit(ipsec_pfkey_exit);
3856MODULE_LICENSE("GPL");
3857MODULE_ALIAS_NETPROTO(PF_KEY);
ubuntu-zesty-kernel mirror