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Merge tag 'fuse-update-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/mszered...
[linux-2.6-block.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
c7d03a00 39static unsigned 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;
89e357d8 66 struct mutex dump_lock;
1da177e4
LT		 67};
68
096f41d3
HX		 69static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
70 xfrm_address_t *saddr, xfrm_address_t *daddr,
71 u16 *family);
72
1da177e4
LT		 73static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
74{
75 return (struct pfkey_sock *)sk;
76}
77
4c93fbb0 78static int pfkey_can_dump(const struct sock *sk)
83321d6b
TT		 79{
80 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
81 return 1;
82 return 0;
83}
84
05238204 85static void pfkey_terminate_dump(struct pfkey_sock *pfk)
83321d6b 86{
05238204 87 if (pfk->dump.dump) {
12a169e7
HX		 88 if (pfk->dump.skb) {
89 kfree_skb(pfk->dump.skb);
90 pfk->dump.skb = NULL;
91 }
05238204
TT		 92 pfk->dump.done(pfk);
93 pfk->dump.dump = NULL;
94 pfk->dump.done = NULL;
95 }
83321d6b
TT		 96}
97
1da177e4
LT		 98static void pfkey_sock_destruct(struct sock *sk)
99{
3fa87a32
AD		 100 struct net *net = sock_net(sk);
101 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
102
05238204 103 pfkey_terminate_dump(pfkey_sk(sk));
1da177e4
LT		 104 skb_queue_purge(&sk->sk_receive_queue);
105
106 if (!sock_flag(sk, SOCK_DEAD)) {
207024b9 107 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
1da177e4
LT		 108 return;
109 }
110
547b792c 111 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
14afee4b 112 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
1da177e4 113
3fa87a32 114 atomic_dec(&net_pfkey->socks_nr);
1da177e4
LT		 115}
116
90ddc4f0 117static const struct proto_ops pfkey_ops;
1da177e4
LT		 118
119static void pfkey_insert(struct sock *sk)
120{
3fa87a32
AD		 121 struct net *net = sock_net(sk);
122 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
123
7f6b9dbd 124 mutex_lock(&pfkey_mutex);
125 sk_add_node_rcu(sk, &net_pfkey->table);
126 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 127}
128
129static void pfkey_remove(struct sock *sk)
130{
7f6b9dbd 131 mutex_lock(&pfkey_mutex);
132 sk_del_node_init_rcu(sk);
133 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 134}
135
136static struct proto key_proto = {
137 .name = "KEY",
138 .owner = THIS_MODULE,
139 .obj_size = sizeof(struct pfkey_sock),
140};
141
3f378b68
EP		 142static int pfkey_create(struct net *net, struct socket *sock, int protocol,
143 int kern)
1da177e4 144{
3fa87a32 145 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 146 struct sock *sk;
89e357d8 147 struct pfkey_sock *pfk;
1da177e4
LT		 148 int err;
149
df008c91 150 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 151 return -EPERM;
152 if (sock->type != SOCK_RAW)
153 return -ESOCKTNOSUPPORT;
154 if (protocol != PF_KEY_V2)
155 return -EPROTONOSUPPORT;
156
157 err = -ENOMEM;
11aa9c28 158 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
1da177e4
LT		 159 if (sk == NULL)
160 goto out;
8ff24541 161
89e357d8
YS		 162 pfk = pfkey_sk(sk);
163 mutex_init(&pfk->dump_lock);
164
1da177e4
LT		 165 sock->ops = &pfkey_ops;
166 sock_init_data(sock, sk);
167
168 sk->sk_family = PF_KEY;
169 sk->sk_destruct = pfkey_sock_destruct;
170
3fa87a32 171 atomic_inc(&net_pfkey->socks_nr);
1da177e4
LT		 172
173 pfkey_insert(sk);
174
175 return 0;
176out:
177 return err;
178}
179
180static int pfkey_release(struct socket *sock)
181{
182 struct sock *sk = sock->sk;
183
184 if (!sk)
185 return 0;
186
187 pfkey_remove(sk);
188
189 sock_orphan(sk);
190 sock->sk = NULL;
191 skb_queue_purge(&sk->sk_write_queue);
7f6b9dbd 192
193 synchronize_rcu();
1da177e4
LT		 194 sock_put(sk);
195
196 return 0;
197}
198
199static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
dd0fc66f 200 gfp_t allocation, struct sock *sk)
1da177e4
LT		 201{
202 int err = -ENOBUFS;
203
204 sock_hold(sk);
205 if (*skb2 == NULL) {
63354797 206 if (refcount_read(&skb->users) != 1) {
1da177e4
LT		 207 *skb2 = skb_clone(skb, allocation);
208 } else {
209 *skb2 = skb;
63354797 210 refcount_inc(&skb->users);
1da177e4
LT		 211 }
212 }
213 if (*skb2 != NULL) {
214 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
1da177e4
LT		 215 skb_set_owner_r(*skb2, sk);
216 skb_queue_tail(&sk->sk_receive_queue, *skb2);
676d2369 217 sk->sk_data_ready(sk);
1da177e4
LT		 218 *skb2 = NULL;
219 err = 0;
220 }
221 }
222 sock_put(sk);
223 return err;
224}
225
226/* Send SKB to all pfkey sockets matching selected criteria. */
227#define BROADCAST_ALL 0
228#define BROADCAST_ONE 1
229#define BROADCAST_REGISTERED 2
230#define BROADCAST_PROMISC_ONLY 4
36f41f8f 231static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
07fb0f17
AD		 232 int broadcast_flags, struct sock *one_sk,
233 struct net *net)
1da177e4 234{
3fa87a32 235 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 236 struct sock *sk;
1da177e4
LT		 237 struct sk_buff *skb2 = NULL;
238 int err = -ESRCH;
239
240 /* XXX Do we need something like netlink_overrun? I think
241 * XXX PF_KEY socket apps will not mind current behavior.
242 */
243 if (!skb)
244 return -ENOMEM;
245
7f6b9dbd 246 rcu_read_lock();
b67bfe0d 247 sk_for_each_rcu(sk, &net_pfkey->table) {
1da177e4
LT		 248 struct pfkey_sock *pfk = pfkey_sk(sk);
249 int err2;
250
251 /* Yes, it means that if you are meant to receive this
252 * pfkey message you receive it twice as promiscuous
253 * socket.
254 */
255 if (pfk->promisc)
ba51b6be 256 pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
1da177e4
LT		 257
258 /* the exact target will be processed later */
259 if (sk == one_sk)
260 continue;
261 if (broadcast_flags != BROADCAST_ALL) {
262 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
263 continue;
264 if ((broadcast_flags & BROADCAST_REGISTERED) &&
265 !pfk->registered)
266 continue;
267 if (broadcast_flags & BROADCAST_ONE)
268 continue;
269 }
270
ba51b6be 271 err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
1da177e4 272
f6b8dec9 273 /* Error is cleared after successful sending to at least one
1da177e4
LT		 274 * registered KM */
275 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
276 err = err2;
277 }
7f6b9dbd 278 rcu_read_unlock();
1da177e4
LT		 279
280 if (one_sk != NULL)
36f41f8f 281 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
1da177e4 282
6f961068 283 kfree_skb(skb2);
1da177e4
LT		 284 kfree_skb(skb);
285 return err;
286}
287
05238204
TT		 288static int pfkey_do_dump(struct pfkey_sock *pfk)
289{
12a169e7 290 struct sadb_msg *hdr;
05238204
TT		 291 int rc;
292
89e357d8
YS		 293 mutex_lock(&pfk->dump_lock);
294 if (!pfk->dump.dump) {
295 rc = 0;
296 goto out;
297 }
298
05238204 299 rc = pfk->dump.dump(pfk);
89e357d8
YS		 300 if (rc == -ENOBUFS) {
301 rc = 0;
302 goto out;
303 }
05238204 304
12a169e7 305 if (pfk->dump.skb) {
89e357d8
YS		 306 if (!pfkey_can_dump(&pfk->sk)) {
307 rc = 0;
308 goto out;
309 }
12a169e7
HX		 310
311 hdr = (struct sadb_msg *) pfk->dump.skb->data;
312 hdr->sadb_msg_seq = 0;
313 hdr->sadb_msg_errno = rc;
36f41f8f 314 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 315 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 316 pfk->dump.skb = NULL;
317 }
318
05238204 319 pfkey_terminate_dump(pfk);
89e357d8
YS		 320
321out:
322 mutex_unlock(&pfk->dump_lock);
05238204
TT		 323 return rc;
324}
325
4c93fbb0
DM		 326static inline void pfkey_hdr_dup(struct sadb_msg *new,
327 const struct sadb_msg *orig)
1da177e4
LT		 328{
329 *new = *orig;
330}
331
4c93fbb0 332static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
1da177e4
LT		 333{
334 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
335 struct sadb_msg *hdr;
336
337 if (!skb)
338 return -ENOBUFS;
339
340 /* Woe be to the platform trying to support PFKEY yet
341 * having normal errnos outside the 1-255 range, inclusive.
342 */
343 err = -err;
344 if (err == ERESTARTSYS ||
345 err == ERESTARTNOHAND ||
346 err == ERESTARTNOINTR)
347 err = EINTR;
348 if (err >= 512)
349 err = EINVAL;
09a62660 350 BUG_ON(err <= 0 || err >= 256);
1da177e4 351
4df864c1 352 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 353 pfkey_hdr_dup(hdr, orig);
354 hdr->sadb_msg_errno = (uint8_t) err;
355 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
356 sizeof(uint64_t));
357
36f41f8f 358 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 359
360 return 0;
361}
362
8603b955 363static const u8 sadb_ext_min_len[] = {
1da177e4
LT		 364 [SADB_EXT_RESERVED] = (u8) 0,
365 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
366 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
367 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
368 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
369 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
370 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
371 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
372 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
373 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
374 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
375 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
376 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
377 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
378 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
379 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
380 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
381 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
382 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
383 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
384 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
385 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
386 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
387 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
df71837d 388 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
13c1d189 389 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
d2c5f658 390 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
1da177e4
LT		 391};
392
393/* Verify sadb_address_{len,prefixlen} against sa_family. */
4c93fbb0 394static int verify_address_len(const void *p)
1da177e4 395{
4c93fbb0
DM		 396 const struct sadb_address *sp = p;
397 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
398 const struct sockaddr_in *sin;
dfd56b8b 399#if IS_ENABLED(CONFIG_IPV6)
4c93fbb0 400 const struct sockaddr_in6 *sin6;
1da177e4
LT		 401#endif
402 int len;
403
06b335cb
EB		 404 if (sp->sadb_address_len <
405 DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family),
406 sizeof(uint64_t)))
407 return -EINVAL;
408
1da177e4
LT		 409 switch (addr->sa_family) {
410 case AF_INET:
356f89e1 411 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
1da177e4
LT		 412 if (sp->sadb_address_len != len ||
413 sp->sadb_address_prefixlen > 32)
414 return -EINVAL;
415 break;
dfd56b8b 416#if IS_ENABLED(CONFIG_IPV6)
1da177e4 417 case AF_INET6:
356f89e1 418 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
1da177e4
LT		 419 if (sp->sadb_address_len != len ||
420 sp->sadb_address_prefixlen > 128)
421 return -EINVAL;
422 break;
423#endif
424 default:
425 /* It is user using kernel to keep track of security
426 * associations for another protocol, such as
427 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
428 * lengths.
429 *
430 * XXX Actually, association/policy database is not yet
431 * XXX able to cope with arbitrary sockaddr families.
432 * XXX When it can, remove this -EINVAL. -DaveM
433 */
434 return -EINVAL;
3ff50b79 435 }
1da177e4
LT		 436
437 return 0;
438}
439
4b66af2d
KE		 440static inline int sadb_key_len(const struct sadb_key *key)
441{
442 int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8);
443
444 return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes,
445 sizeof(uint64_t));
446}
447
448static int verify_key_len(const void *p)
449{
450 const struct sadb_key *key = p;
451
452 if (sadb_key_len(key) > key->sadb_key_len)
453 return -EINVAL;
454
455 return 0;
456}
457
4c93fbb0 458static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
df71837d 459{
356f89e1
IJ		 460 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
461 sec_ctx->sadb_x_ctx_len,
462 sizeof(uint64_t));
df71837d
TJ		 463}
464
4c93fbb0 465static inline int verify_sec_ctx_len(const void *p)
df71837d 466{
4c93fbb0 467 const struct sadb_x_sec_ctx *sec_ctx = p;
298bb621 468 int len = sec_ctx->sadb_x_ctx_len;
df71837d 469
298bb621 470 if (len > PAGE_SIZE)
df71837d
TJ		 471 return -EINVAL;
472
473 len = pfkey_sec_ctx_len(sec_ctx);
474
475 if (sec_ctx->sadb_x_sec_len != len)
476 return -EINVAL;
477
478 return 0;
479}
480
87536a81
NA		 481static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
482 gfp_t gfp)
df71837d
TJ		 483{
484 struct xfrm_user_sec_ctx *uctx = NULL;
485 int ctx_size = sec_ctx->sadb_x_ctx_len;
486
87536a81 487 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
df71837d
TJ		 488
489 if (!uctx)
490 return NULL;
491
492 uctx->len = pfkey_sec_ctx_len(sec_ctx);
493 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
494 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
495 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
496 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
497 memcpy(uctx + 1, sec_ctx + 1,
498 uctx->ctx_len);
499
500 return uctx;
501}
502
4c93fbb0
DM		 503static int present_and_same_family(const struct sadb_address *src,
504 const struct sadb_address *dst)
1da177e4 505{
4c93fbb0 506 const struct sockaddr *s_addr, *d_addr;
1da177e4
LT		 507
508 if (!src || !dst)
509 return 0;
510
4c93fbb0
DM		 511 s_addr = (const struct sockaddr *)(src + 1);
512 d_addr = (const struct sockaddr *)(dst + 1);
1da177e4
LT		 513 if (s_addr->sa_family != d_addr->sa_family)
514 return 0;
515 if (s_addr->sa_family != AF_INET
dfd56b8b 516#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 517 && s_addr->sa_family != AF_INET6
518#endif
519 )
520 return 0;
521
522 return 1;
523}
524
4c93fbb0 525static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
1da177e4 526{
4c93fbb0 527 const char *p = (char *) hdr;
1da177e4
LT		 528 int len = skb->len;
529
530 len -= sizeof(*hdr);
531 p += sizeof(*hdr);
532 while (len > 0) {
4c93fbb0 533 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
1da177e4
LT		 534 uint16_t ext_type;
535 int ext_len;
536
4e765b49
EB		 537 if (len < sizeof(*ehdr))
538 return -EINVAL;
539
1da177e4
LT		 540 ext_len = ehdr->sadb_ext_len;
541 ext_len *= sizeof(uint64_t);
542 ext_type = ehdr->sadb_ext_type;
543 if (ext_len < sizeof(uint64_t) ||
544 ext_len > len ||
545 ext_type == SADB_EXT_RESERVED)
546 return -EINVAL;
547
548 if (ext_type <= SADB_EXT_MAX) {
549 int min = (int) sadb_ext_min_len[ext_type];
550 if (ext_len < min)
551 return -EINVAL;
552 if (ext_hdrs[ext_type-1] != NULL)
553 return -EINVAL;
4b66af2d
KE		 554 switch (ext_type) {
555 case SADB_EXT_ADDRESS_SRC:
556 case SADB_EXT_ADDRESS_DST:
557 case SADB_EXT_ADDRESS_PROXY:
558 case SADB_X_EXT_NAT_T_OA:
1da177e4
LT		 559 if (verify_address_len(p))
560 return -EINVAL;
4b66af2d
KE		 561 break;
562 case SADB_X_EXT_SEC_CTX:
df71837d
TJ		 563 if (verify_sec_ctx_len(p))
564 return -EINVAL;
4b66af2d
KE		 565 break;
566 case SADB_EXT_KEY_AUTH:
567 case SADB_EXT_KEY_ENCRYPT:
568 if (verify_key_len(p))
569 return -EINVAL;
570 break;
571 default:
572 break;
df71837d 573 }
4c93fbb0 574 ext_hdrs[ext_type-1] = (void *) p;
1da177e4
LT		 575 }
576 p += ext_len;
577 len -= ext_len;
578 }
579
580 return 0;
581}
582
583static uint16_t
584pfkey_satype2proto(uint8_t satype)
585{
586 switch (satype) {
587 case SADB_SATYPE_UNSPEC:
588 return IPSEC_PROTO_ANY;
589 case SADB_SATYPE_AH:
590 return IPPROTO_AH;
591 case SADB_SATYPE_ESP:
592 return IPPROTO_ESP;
593 case SADB_X_SATYPE_IPCOMP:
594 return IPPROTO_COMP;
1da177e4
LT		 595 default:
596 return 0;
597 }
598 /* NOTREACHED */
599}
600
601static uint8_t
602pfkey_proto2satype(uint16_t proto)
603{
604 switch (proto) {
605 case IPPROTO_AH:
606 return SADB_SATYPE_AH;
607 case IPPROTO_ESP:
608 return SADB_SATYPE_ESP;
609 case IPPROTO_COMP:
610 return SADB_X_SATYPE_IPCOMP;
1da177e4
LT		 611 default:
612 return 0;
613 }
614 /* NOTREACHED */
615}
616
617/* BTW, this scheme means that there is no way with PFKEY2 sockets to
618 * say specifically 'just raw sockets' as we encode them as 255.
619 */
620
621static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
622{
a02cec21 623 return proto == IPSEC_PROTO_ANY ? 0 : proto;
1da177e4
LT		 624}
625
626static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
627{
a02cec21 628 return proto ? proto : IPSEC_PROTO_ANY;
1da177e4
LT		 629}
630
9e8b4ed8
YH		 631static inline int pfkey_sockaddr_len(sa_family_t family)
632{
633 switch (family) {
634 case AF_INET:
635 return sizeof(struct sockaddr_in);
dfd56b8b 636#if IS_ENABLED(CONFIG_IPV6)
9e8b4ed8
YH		 637 case AF_INET6:
638 return sizeof(struct sockaddr_in6);
639#endif
640 }
641 return 0;
642}
643
5f95ac91
YH		 644static
645int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
1da177e4 646{
5f95ac91 647 switch (sa->sa_family) {
1da177e4 648 case AF_INET:
8ff24541 649 xaddr->a4 =
5f95ac91 650 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
1da177e4 651 return AF_INET;
dfd56b8b 652#if IS_ENABLED(CONFIG_IPV6)
1da177e4 653 case AF_INET6:
8ff24541 654 memcpy(xaddr->a6,
5f95ac91 655 &((struct sockaddr_in6 *)sa)->sin6_addr,
1da177e4
LT		 656 sizeof(struct in6_addr));
657 return AF_INET6;
658#endif
1da177e4 659 }
5f95ac91
YH		 660 return 0;
661}
662
663static
4c93fbb0 664int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
5f95ac91
YH		 665{
666 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
667 xaddr);
1da177e4
LT		 668}
669
4c93fbb0 670static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 671{
4c93fbb0
DM		 672 const struct sadb_sa *sa;
673 const struct sadb_address *addr;
1da177e4
LT		 674 uint16_t proto;
675 unsigned short family;
676 xfrm_address_t *xaddr;
677
ea110733 678 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 679 if (sa == NULL)
680 return NULL;
681
682 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
683 if (proto == 0)
684 return NULL;
685
686 /* sadb_address_len should be checked by caller */
ea110733 687 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
1da177e4
LT		 688 if (addr == NULL)
689 return NULL;
690
4c93fbb0 691 family = ((const struct sockaddr *)(addr + 1))->sa_family;
1da177e4
LT		 692 switch (family) {
693 case AF_INET:
4c93fbb0 694 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
1da177e4 695 break;
dfd56b8b 696#if IS_ENABLED(CONFIG_IPV6)
1da177e4 697 case AF_INET6:
4c93fbb0 698 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
1da177e4
LT		 699 break;
700#endif
701 default:
702 xaddr = NULL;
703 }
704
705 if (!xaddr)
706 return NULL;
707
bd55775c 708 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
1da177e4
LT		 709}
710
711#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
9e8b4ed8 712
1da177e4
LT		 713static int
714pfkey_sockaddr_size(sa_family_t family)
715{
9e8b4ed8 716 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
1da177e4
LT		 717}
718
55569ce2
KM		 719static inline int pfkey_mode_from_xfrm(int mode)
720{
721 switch(mode) {
722 case XFRM_MODE_TRANSPORT:
723 return IPSEC_MODE_TRANSPORT;
724 case XFRM_MODE_TUNNEL:
725 return IPSEC_MODE_TUNNEL;
726 case XFRM_MODE_BEET:
727 return IPSEC_MODE_BEET;
728 default:
729 return -1;
730 }
731}
732
733static inline int pfkey_mode_to_xfrm(int mode)
734{
735 switch(mode) {
736 case IPSEC_MODE_ANY: /*XXX*/
737 case IPSEC_MODE_TRANSPORT:
738 return XFRM_MODE_TRANSPORT;
739 case IPSEC_MODE_TUNNEL:
740 return XFRM_MODE_TUNNEL;
741 case IPSEC_MODE_BEET:
742 return XFRM_MODE_BEET;
743 default:
744 return -1;
745 }
746}
747
183cad12 748static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
4c93fbb0
DM		 749 struct sockaddr *sa,
750 unsigned short family)
e5b56652
YH		 751{
752 switch (family) {
753 case AF_INET:
754 {
755 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
756 sin->sin_family = AF_INET;
757 sin->sin_port = port;
758 sin->sin_addr.s_addr = xaddr->a4;
759 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
760 return 32;
761 }
dfd56b8b 762#if IS_ENABLED(CONFIG_IPV6)
e5b56652
YH		 763 case AF_INET6:
764 {
765 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
766 sin6->sin6_family = AF_INET6;
767 sin6->sin6_port = port;
768 sin6->sin6_flowinfo = 0;
15e318bd 769 sin6->sin6_addr = xaddr->in6;
e5b56652
YH		 770 sin6->sin6_scope_id = 0;
771 return 128;
772 }
773#endif
774 }
775 return 0;
776}
777
4c93fbb0 778static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
050f009e 779 int add_keys, int hsc)
1da177e4
LT		 780{
781 struct sk_buff *skb;
782 struct sadb_msg *hdr;
783 struct sadb_sa *sa;
784 struct sadb_lifetime *lifetime;
785 struct sadb_address *addr;
786 struct sadb_key *key;
787 struct sadb_x_sa2 *sa2;
df71837d
TJ		 788 struct sadb_x_sec_ctx *sec_ctx;
789 struct xfrm_sec_ctx *xfrm_ctx;
790 int ctx_size = 0;
1da177e4
LT		 791 int size;
792 int auth_key_size = 0;
793 int encrypt_key_size = 0;
794 int sockaddr_size;
795 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 796 int mode;
1da177e4
LT		 797
798 /* address family check */
799 sockaddr_size = pfkey_sockaddr_size(x->props.family);
800 if (!sockaddr_size)
801 return ERR_PTR(-EINVAL);
802
803 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
804 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 805 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 806 sizeof(struct sadb_lifetime) +
807 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
808 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 809 sizeof(struct sadb_address)*2 +
1da177e4
LT		 810 sockaddr_size*2 +
811 sizeof(struct sadb_x_sa2);
df71837d
TJ		 812
813 if ((xfrm_ctx = x->security)) {
814 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
815 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
816 }
817
1da177e4 818 /* identity & sensitivity */
70e94e66 819 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
1da177e4
LT		 820 size += sizeof(struct sadb_address) + sockaddr_size;
821
822 if (add_keys) {
823 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 824 auth_key_size =
825 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 826 size += sizeof(struct sadb_key) + auth_key_size;
827 }
828 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 829 encrypt_key_size =
830 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 831 size += sizeof(struct sadb_key) + encrypt_key_size;
832 }
833 }
834 if (x->encap)
835 natt = x->encap;
836
837 if (natt && natt->encap_type) {
838 size += sizeof(struct sadb_x_nat_t_type);
839 size += sizeof(struct sadb_x_nat_t_port);
840 size += sizeof(struct sadb_x_nat_t_port);
841 }
842
843 skb = alloc_skb(size + 16, GFP_ATOMIC);
844 if (skb == NULL)
845 return ERR_PTR(-ENOBUFS);
846
847 /* call should fill header later */
4df864c1 848 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 849 memset(hdr, 0, size); /* XXX do we need this ? */
850 hdr->sadb_msg_len = size / sizeof(uint64_t);
851
852 /* sa */
4df864c1 853 sa = skb_put(skb, sizeof(struct sadb_sa));
1da177e4
LT		 854 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
855 sa->sadb_sa_exttype = SADB_EXT_SA;
856 sa->sadb_sa_spi = x->id.spi;
857 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 858 switch (x->km.state) {
859 case XFRM_STATE_VALID:
860 sa->sadb_sa_state = x->km.dying ?
861 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
862 break;
863 case XFRM_STATE_ACQ:
1da177e4 864 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 865 break;
866 default:
1da177e4 867 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 868 break;
869 }
1da177e4
LT		 870 sa->sadb_sa_auth = 0;
871 if (x->aalg) {
872 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
7e50f84c
JK		 873 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
874 a->desc.sadb_alg_id : 0;
1da177e4
LT		 875 }
876 sa->sadb_sa_encrypt = 0;
877 BUG_ON(x->ealg && x->calg);
878 if (x->ealg) {
879 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
7e50f84c
JK		 880 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
881 a->desc.sadb_alg_id : 0;
1da177e4
LT		 882 }
883 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
884 if (x->calg) {
885 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
7e50f84c
JK		 886 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
887 a->desc.sadb_alg_id : 0;
1da177e4
LT		 888 }
889
890 sa->sadb_sa_flags = 0;
891 if (x->props.flags & XFRM_STATE_NOECN)
892 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
893 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
894 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 895 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
896 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 897
898 /* hard time */
899 if (hsc & 2) {
4df864c1 900 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 901 lifetime->sadb_lifetime_len =
902 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
903 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
904 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
905 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
906 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
907 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
908 }
909 /* soft time */
910 if (hsc & 1) {
4df864c1 911 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 912 lifetime->sadb_lifetime_len =
913 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
914 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
915 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
916 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
917 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
918 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
919 }
920 /* current time */
4df864c1 921 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 922 lifetime->sadb_lifetime_len =
923 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
924 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
925 lifetime->sadb_lifetime_allocations = x->curlft.packets;
926 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
927 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
928 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
929 /* src address */
4df864c1 930 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 931 addr->sadb_address_len =
1da177e4
LT		 932 (sizeof(struct sadb_address)+sockaddr_size)/
933 sizeof(uint64_t);
934 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 935 /* "if the ports are non-zero, then the sadb_address_proto field,
936 normally zero, MUST be filled in with the transport
1da177e4 937 protocol's number." - RFC2367 */
8ff24541 938 addr->sadb_address_proto = 0;
1da177e4 939 addr->sadb_address_reserved = 0;
1da177e4 940
e5b56652
YH		 941 addr->sadb_address_prefixlen =
942 pfkey_sockaddr_fill(&x->props.saddr, 0,
943 (struct sockaddr *) (addr + 1),
944 x->props.family);
945 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 946 BUG();
947
948 /* dst address */
4df864c1 949 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 950 addr->sadb_address_len =
1da177e4
LT		 951 (sizeof(struct sadb_address)+sockaddr_size)/
952 sizeof(uint64_t);
953 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
8ff24541 954 addr->sadb_address_proto = 0;
1da177e4 955 addr->sadb_address_reserved = 0;
1da177e4 956
e5b56652
YH		 957 addr->sadb_address_prefixlen =
958 pfkey_sockaddr_fill(&x->id.daddr, 0,
959 (struct sockaddr *) (addr + 1),
960 x->props.family);
961 if (!addr->sadb_address_prefixlen)
962 BUG();
1da177e4 963
70e94e66
YH		 964 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
965 x->props.family)) {
4df864c1
JB		 966 addr = skb_put(skb,
967 sizeof(struct sadb_address) + sockaddr_size);
e5b56652
YH		 968 addr->sadb_address_len =
969 (sizeof(struct sadb_address)+sockaddr_size)/
970 sizeof(uint64_t);
971 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
972 addr->sadb_address_proto =
973 pfkey_proto_from_xfrm(x->sel.proto);
974 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
975 addr->sadb_address_reserved = 0;
1da177e4 976
e5b56652
YH		 977 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
978 (struct sockaddr *) (addr + 1),
979 x->props.family);
1da177e4 980 }
1da177e4
LT		 981
982 /* auth key */
983 if (add_keys && auth_key_size) {
4df864c1 984 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
1da177e4
LT		 985 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
986 sizeof(uint64_t);
987 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
988 key->sadb_key_bits = x->aalg->alg_key_len;
989 key->sadb_key_reserved = 0;
990 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
991 }
992 /* encrypt key */
993 if (add_keys && encrypt_key_size) {
4df864c1 994 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
8ff24541 995 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 996 encrypt_key_size) / sizeof(uint64_t);
997 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
998 key->sadb_key_bits = x->ealg->alg_key_len;
999 key->sadb_key_reserved = 0;
8ff24541 1000 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 1001 (x->ealg->alg_key_len+7)/8);
1002 }
1003
1004 /* sa */
4df864c1 1005 sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
1da177e4
LT		 1006 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
1007 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 1008 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
1009 kfree_skb(skb);
1010 return ERR_PTR(-EINVAL);
1011 }
1012 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 1013 sa2->sadb_x_sa2_reserved1 = 0;
1014 sa2->sadb_x_sa2_reserved2 = 0;
1015 sa2->sadb_x_sa2_sequence = 0;
1016 sa2->sadb_x_sa2_reqid = x->props.reqid;
1017
1018 if (natt && natt->encap_type) {
1019 struct sadb_x_nat_t_type *n_type;
1020 struct sadb_x_nat_t_port *n_port;
1021
1022 /* type */
4df864c1 1023 n_type = skb_put(skb, sizeof(*n_type));
1da177e4
LT		 1024 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1025 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1026 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1027 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1028 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1029 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1030
1031 /* source port */
4df864c1 1032 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 1033 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1034 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1035 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1036 n_port->sadb_x_nat_t_port_reserved = 0;
1037
1038 /* dest port */
4df864c1 1039 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 1040 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1041 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1042 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1043 n_port->sadb_x_nat_t_port_reserved = 0;
1044 }
1045
df71837d
TJ		 1046 /* security context */
1047 if (xfrm_ctx) {
4df864c1
JB		 1048 sec_ctx = skb_put(skb,
1049 sizeof(struct sadb_x_sec_ctx) + ctx_size);
df71837d
TJ		 1050 sec_ctx->sadb_x_sec_len =
1051 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1052 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1053 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1054 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1055 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1056 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1057 xfrm_ctx->ctx_len);
1058 }
1059
1da177e4
LT		 1060 return skb;
1061}
1062
050f009e 1063
4c93fbb0 1064static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
050f009e
HX		 1065{
1066 struct sk_buff *skb;
1067
050f009e 1068 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1069
1070 return skb;
1071}
1072
4c93fbb0 1073static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
050f009e
HX		 1074 int hsc)
1075{
1076 return __pfkey_xfrm_state2msg(x, 0, hsc);
1077}
1078
07fb0f17 1079static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
4c93fbb0
DM		 1080 const struct sadb_msg *hdr,
1081 void * const *ext_hdrs)
1da177e4 1082{
8ff24541 1083 struct xfrm_state *x;
4c93fbb0
DM		 1084 const struct sadb_lifetime *lifetime;
1085 const struct sadb_sa *sa;
1086 const struct sadb_key *key;
1087 const struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1088 uint16_t proto;
1089 int err;
8ff24541 1090
1da177e4 1091
ea110733 1092 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 1093 if (!sa ||
1094 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1095 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1096 return ERR_PTR(-EINVAL);
1097 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1098 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1099 return ERR_PTR(-EINVAL);
1100 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1101 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1102 return ERR_PTR(-EINVAL);
1103 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1104 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1105 return ERR_PTR(-EINVAL);
1106
1107 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1108 if (proto == 0)
1109 return ERR_PTR(-EINVAL);
1110
1111 /* default error is no buffer space */
1112 err = -ENOBUFS;
1113
1114 /* RFC2367:
1115
1116 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1117 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1118 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1119 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1120 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1121 not true.
1122
8ff24541 1123 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1124 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1125 */
1126 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1127 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1128 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1129 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1130 return ERR_PTR(-EINVAL);
ea110733 1131 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1132 if (key != NULL &&
1133 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
4b66af2d 1134 key->sadb_key_bits == 0)
1da177e4
LT		 1135 return ERR_PTR(-EINVAL);
1136 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1137 if (key != NULL &&
1138 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
4b66af2d 1139 key->sadb_key_bits == 0)
1da177e4
LT		 1140 return ERR_PTR(-EINVAL);
1141
07fb0f17 1142 x = xfrm_state_alloc(net);
1da177e4
LT		 1143 if (x == NULL)
1144 return ERR_PTR(-ENOBUFS);
1145
1146 x->id.proto = proto;
1147 x->id.spi = sa->sadb_sa_spi;
33fce60d
FD		 1148 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1149 (sizeof(x->replay.bitmap) * 8));
1da177e4
LT		 1150 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1151 x->props.flags |= XFRM_STATE_NOECN;
1152 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1153 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1154 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1155 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4 1156
ea110733 1157 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1da177e4
LT		 1158 if (lifetime != NULL) {
1159 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1160 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1161 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1162 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1163 }
ea110733 1164 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1da177e4
LT		 1165 if (lifetime != NULL) {
1166 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1167 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1168 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1169 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1170 }
df71837d 1171
ea110733 1172 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 1173 if (sec_ctx != NULL) {
87536a81 1174 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 1175
1176 if (!uctx)
1177 goto out;
1178
1179 err = security_xfrm_state_alloc(x, uctx);
1180 kfree(uctx);
1181
1182 if (err)
1183 goto out;
1184 }
1185
e747f643 1186 err = -ENOBUFS;
ea110733 1187 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1188 if (sa->sadb_sa_auth) {
1189 int keysize = 0;
1190 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
7e50f84c 1191 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1192 err = -ENOSYS;
1193 goto out;
1194 }
1195 if (key)
1196 keysize = (key->sadb_key_bits + 7) / 8;
1197 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1e3d0c2c
DC		 1198 if (!x->aalg) {
1199 err = -ENOMEM;
1da177e4 1200 goto out;
1e3d0c2c 1201 }
1da177e4
LT		 1202 strcpy(x->aalg->alg_name, a->name);
1203 x->aalg->alg_key_len = 0;
1204 if (key) {
1205 x->aalg->alg_key_len = key->sadb_key_bits;
1206 memcpy(x->aalg->alg_key, key+1, keysize);
1207 }
c20a66f4 1208 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1da177e4
LT		 1209 x->props.aalgo = sa->sadb_sa_auth;
1210 /* x->algo.flags = sa->sadb_sa_flags; */
1211 }
1212 if (sa->sadb_sa_encrypt) {
1213 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1214 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1215 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1216 err = -ENOSYS;
1217 goto out;
1218 }
1219 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1e3d0c2c
DC		 1220 if (!x->calg) {
1221 err = -ENOMEM;
1da177e4 1222 goto out;
1e3d0c2c 1223 }
1da177e4
LT		 1224 strcpy(x->calg->alg_name, a->name);
1225 x->props.calgo = sa->sadb_sa_encrypt;
1226 } else {
1227 int keysize = 0;
1228 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1229 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1230 err = -ENOSYS;
1231 goto out;
1232 }
1233 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1234 if (key)
1235 keysize = (key->sadb_key_bits + 7) / 8;
1236 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1e3d0c2c
DC		 1237 if (!x->ealg) {
1238 err = -ENOMEM;
1da177e4 1239 goto out;
1e3d0c2c 1240 }
1da177e4
LT		 1241 strcpy(x->ealg->alg_name, a->name);
1242 x->ealg->alg_key_len = 0;
1243 if (key) {
1244 x->ealg->alg_key_len = key->sadb_key_bits;
1245 memcpy(x->ealg->alg_key, key+1, keysize);
1246 }
1247 x->props.ealgo = sa->sadb_sa_encrypt;
69b0137f 1248 x->geniv = a->uinfo.encr.geniv;
1da177e4
LT		 1249 }
1250 }
1251 /* x->algo.flags = sa->sadb_sa_flags; */
1252
8ff24541 1253 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4 1254 &x->props.saddr);
8ff24541 1255 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1256 &x->id.daddr);
1257
1258 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
4c93fbb0 1259 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1260 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1261 if (mode < 0) {
1262 err = -EINVAL;
1263 goto out;
1264 }
1265 x->props.mode = mode;
1da177e4
LT		 1266 x->props.reqid = sa2->sadb_x_sa2_reqid;
1267 }
1268
1269 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
4c93fbb0 1270 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1da177e4
LT		 1271
1272 /* Nobody uses this, but we try. */
1273 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1274 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1275 }
1276
4da51056 1277 if (!x->sel.family)
4a4b6271
JL		 1278 x->sel.family = x->props.family;
1279
1da177e4 1280 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
4c93fbb0 1281 const struct sadb_x_nat_t_type* n_type;
1da177e4
LT		 1282 struct xfrm_encap_tmpl *natt;
1283
1284 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1e3d0c2c
DC		 1285 if (!x->encap) {
1286 err = -ENOMEM;
1da177e4 1287 goto out;
1e3d0c2c 1288 }
1da177e4
LT		 1289
1290 natt = x->encap;
1291 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1292 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1293
1294 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
4c93fbb0 1295 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1296 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1297 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1298 }
1299 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
4c93fbb0 1300 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1301 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1302 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1303 }
a8d694c6 1304 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1da177e4
LT		 1305 }
1306
72cb6962
HX		 1307 err = xfrm_init_state(x);
1308 if (err)
1da177e4 1309 goto out;
72cb6962 1310
1da177e4 1311 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1312 return x;
1313
1314out:
1315 x->km.state = XFRM_STATE_DEAD;
1316 xfrm_state_put(x);
1317 return ERR_PTR(err);
1318}
1319
4c93fbb0 1320static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1321{
1322 return -EOPNOTSUPP;
1323}
1324
4c93fbb0 1325static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1326{
07fb0f17 1327 struct net *net = sock_net(sk);
1da177e4
LT		 1328 struct sk_buff *resp_skb;
1329 struct sadb_x_sa2 *sa2;
1330 struct sadb_address *saddr, *daddr;
1331 struct sadb_msg *out_hdr;
658b219e 1332 struct sadb_spirange *range;
1da177e4 1333 struct xfrm_state *x = NULL;
55569ce2 1334 int mode;
658b219e
HX		 1335 int err;
1336 u32 min_spi, max_spi;
1da177e4
LT		 1337 u32 reqid;
1338 u8 proto;
1339 unsigned short family;
1340 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1341
1342 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1343 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1344 return -EINVAL;
1345
1346 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1347 if (proto == 0)
1348 return -EINVAL;
1349
1350 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1351 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1352 if (mode < 0)
1353 return -EINVAL;
1da177e4
LT		 1354 reqid = sa2->sadb_x_sa2_reqid;
1355 } else {
1356 mode = 0;
1357 reqid = 0;
1358 }
1359
1360 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1361 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1362
1363 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1364 switch (family) {
1365 case AF_INET:
1366 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1367 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1368 break;
dfd56b8b 1369#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1370 case AF_INET6:
1371 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1372 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1373 break;
1374#endif
1375 }
1376
1377 if (hdr->sadb_msg_seq) {
bd55775c 1378 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
70e94e66 1379 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1da177e4
LT		 1380 xfrm_state_put(x);
1381 x = NULL;
1382 }
1383 }
1384
1385 if (!x)
7e652640 1386 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, 0, proto, xdaddr, xsaddr, 1, family);
1da177e4
LT		 1387
1388 if (x == NULL)
1389 return -ENOENT;
1390
658b219e
HX		 1391 min_spi = 0x100;
1392 max_spi = 0x0fffffff;
1da177e4 1393
658b219e
HX		 1394 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1395 if (range) {
1396 min_spi = range->sadb_spirange_min;
1397 max_spi = range->sadb_spirange_max;
1da177e4 1398 }
658b219e 1399
776e9dd9
FD		 1400 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1401 if (err) {
1402 xfrm_state_put(x);
1403 return err;
1404 }
1405
658b219e 1406 err = xfrm_alloc_spi(x, min_spi, max_spi);
050f009e 1407 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1408
1409 if (IS_ERR(resp_skb)) {
1410 xfrm_state_put(x);
1411 return PTR_ERR(resp_skb);
1412 }
1413
1414 out_hdr = (struct sadb_msg *) resp_skb->data;
1415 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1416 out_hdr->sadb_msg_type = SADB_GETSPI;
1417 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1418 out_hdr->sadb_msg_errno = 0;
1419 out_hdr->sadb_msg_reserved = 0;
1420 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1421 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1422
1423 xfrm_state_put(x);
1424
36f41f8f 1425 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1da177e4
LT		 1426
1427 return 0;
1428}
1429
4c93fbb0 1430static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1431{
07fb0f17 1432 struct net *net = sock_net(sk);
1da177e4
LT		 1433 struct xfrm_state *x;
1434
1435 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1436 return -EOPNOTSUPP;
1437
1438 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1439 return 0;
1440
bd55775c 1441 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1da177e4
LT		 1442 if (x == NULL)
1443 return 0;
1444
1445 spin_lock_bh(&x->lock);
5b8ef341 1446 if (x->km.state == XFRM_STATE_ACQ)
1da177e4 1447 x->km.state = XFRM_STATE_ERROR;
5b8ef341 1448
1da177e4
LT		 1449 spin_unlock_bh(&x->lock);
1450 xfrm_state_put(x);
1451 return 0;
1452}
1453
26b15dad
JHS		 1454static inline int event2poltype(int event)
1455{
1456 switch (event) {
f60f6b8f 1457 case XFRM_MSG_DELPOLICY:
26b15dad 1458 return SADB_X_SPDDELETE;
f60f6b8f 1459 case XFRM_MSG_NEWPOLICY:
26b15dad 1460 return SADB_X_SPDADD;
f60f6b8f 1461 case XFRM_MSG_UPDPOLICY:
26b15dad 1462 return SADB_X_SPDUPDATE;
f60f6b8f 1463 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1464 // return SADB_X_SPDEXPIRE;
1465 default:
207024b9 1466 pr_err("pfkey: Unknown policy event %d\n", event);
26b15dad
JHS		 1467 break;
1468 }
1469
1470 return 0;
1471}
1472
1473static inline int event2keytype(int event)
1474{
1475 switch (event) {
f60f6b8f 1476 case XFRM_MSG_DELSA:
26b15dad 1477 return SADB_DELETE;
f60f6b8f 1478 case XFRM_MSG_NEWSA:
26b15dad 1479 return SADB_ADD;
f60f6b8f 1480 case XFRM_MSG_UPDSA:
26b15dad 1481 return SADB_UPDATE;
f60f6b8f 1482 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1483 return SADB_EXPIRE;
1484 default:
207024b9 1485 pr_err("pfkey: Unknown SA event %d\n", event);
26b15dad
JHS		 1486 break;
1487 }
1488
1489 return 0;
1490}
1491
1492/* ADD/UPD/DEL */
214e005b 1493static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1494{
1495 struct sk_buff *skb;
1496 struct sadb_msg *hdr;
26b15dad 1497
050f009e 1498 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1499
1500 if (IS_ERR(skb))
1501 return PTR_ERR(skb);
1502
1503 hdr = (struct sadb_msg *) skb->data;
1504 hdr->sadb_msg_version = PF_KEY_V2;
1505 hdr->sadb_msg_type = event2keytype(c->event);
1506 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1507 hdr->sadb_msg_errno = 0;
1508 hdr->sadb_msg_reserved = 0;
1509 hdr->sadb_msg_seq = c->seq;
15e47304 1510 hdr->sadb_msg_pid = c->portid;
26b15dad 1511
36f41f8f 1512 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
26b15dad
JHS		 1513
1514 return 0;
1515}
1da177e4 1516
4c93fbb0 1517static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1518{
07fb0f17 1519 struct net *net = sock_net(sk);
1da177e4
LT		 1520 struct xfrm_state *x;
1521 int err;
26b15dad 1522 struct km_event c;
1da177e4 1523
07fb0f17 1524 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1da177e4
LT		 1525 if (IS_ERR(x))
1526 return PTR_ERR(x);
1527
26b15dad 1528 xfrm_state_hold(x);
1da177e4
LT		 1529 if (hdr->sadb_msg_type == SADB_ADD)
1530 err = xfrm_state_add(x);
1531 else
1532 err = xfrm_state_update(x);
1533
2e71029e 1534 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 1535
1da177e4
LT		 1536 if (err < 0) {
1537 x->km.state = XFRM_STATE_DEAD;
21380b81 1538 __xfrm_state_put(x);
7d6dfe1f 1539 goto out;
1da177e4
LT		 1540 }
1541
26b15dad 1542 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1543 c.event = XFRM_MSG_NEWSA;
26b15dad 1544 else
f60f6b8f 1545 c.event = XFRM_MSG_UPDSA;
26b15dad 1546 c.seq = hdr->sadb_msg_seq;
15e47304 1547 c.portid = hdr->sadb_msg_pid;
26b15dad 1548 km_state_notify(x, &c);
7d6dfe1f 1549out:
26b15dad 1550 xfrm_state_put(x);
26b15dad 1551 return err;
1da177e4
LT		 1552}
1553
4c93fbb0 1554static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1555{
07fb0f17 1556 struct net *net = sock_net(sk);
1da177e4 1557 struct xfrm_state *x;
26b15dad
JHS		 1558 struct km_event c;
1559 int err;
1da177e4
LT		 1560
1561 if (!ext_hdrs[SADB_EXT_SA-1] ||
1562 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1563 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1564 return -EINVAL;
1565
07fb0f17 1566 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1567 if (x == NULL)
1568 return -ESRCH;
1569
c8c05a8e
CZ		 1570 if ((err = security_xfrm_state_delete(x)))
1571 goto out;
1572
1da177e4 1573 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1574 err = -EPERM;
1575 goto out;
1da177e4 1576 }
161a09e7 1577
26b15dad 1578 err = xfrm_state_delete(x);
161a09e7 1579
c8c05a8e
CZ		 1580 if (err < 0)
1581 goto out;
1da177e4 1582
26b15dad 1583 c.seq = hdr->sadb_msg_seq;
15e47304 1584 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1585 c.event = XFRM_MSG_DELSA;
26b15dad 1586 km_state_notify(x, &c);
c8c05a8e 1587out:
2e71029e 1588 xfrm_audit_state_delete(x, err ? 0 : 1, true);
26b15dad 1589 xfrm_state_put(x);
1da177e4 1590
26b15dad 1591 return err;
1da177e4
LT		 1592}
1593
4c93fbb0 1594static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1595{
07fb0f17 1596 struct net *net = sock_net(sk);
1da177e4
LT		 1597 __u8 proto;
1598 struct sk_buff *out_skb;
1599 struct sadb_msg *out_hdr;
1600 struct xfrm_state *x;
1601
1602 if (!ext_hdrs[SADB_EXT_SA-1] ||
1603 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1604 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1605 return -EINVAL;
1606
07fb0f17 1607 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1608 if (x == NULL)
1609 return -ESRCH;
1610
050f009e 1611 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1612 proto = x->id.proto;
1613 xfrm_state_put(x);
1614 if (IS_ERR(out_skb))
1615 return PTR_ERR(out_skb);
1616
1617 out_hdr = (struct sadb_msg *) out_skb->data;
1618 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1619 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1620 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1621 out_hdr->sadb_msg_errno = 0;
1622 out_hdr->sadb_msg_reserved = 0;
1623 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1624 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
36f41f8f 1625 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 1626
1627 return 0;
1628}
1629
4c93fbb0 1630static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
dd0fc66f 1631 gfp_t allocation)
1da177e4
LT		 1632{
1633 struct sk_buff *skb;
1634 struct sadb_msg *hdr;
1635 int len, auth_len, enc_len, i;
1636
7e50f84c 1637 auth_len = xfrm_count_pfkey_auth_supported();
1da177e4
LT		 1638 if (auth_len) {
1639 auth_len *= sizeof(struct sadb_alg);
1640 auth_len += sizeof(struct sadb_supported);
1641 }
8ff24541 1642
7e50f84c 1643 enc_len = xfrm_count_pfkey_enc_supported();
1da177e4
LT		 1644 if (enc_len) {
1645 enc_len *= sizeof(struct sadb_alg);
1646 enc_len += sizeof(struct sadb_supported);
1647 }
8ff24541 1648
1da177e4
LT		 1649 len = enc_len + auth_len + sizeof(struct sadb_msg);
1650
1651 skb = alloc_skb(len + 16, allocation);
1652 if (!skb)
1653 goto out_put_algs;
1654
4df864c1 1655 hdr = skb_put(skb, sizeof(*hdr));
1da177e4
LT		 1656 pfkey_hdr_dup(hdr, orig);
1657 hdr->sadb_msg_errno = 0;
1658 hdr->sadb_msg_len = len / sizeof(uint64_t);
1659
1660 if (auth_len) {
1661 struct sadb_supported *sp;
1662 struct sadb_alg *ap;
1663
4df864c1 1664 sp = skb_put(skb, auth_len);
1da177e4
LT		 1665 ap = (struct sadb_alg *) (sp + 1);
1666
1667 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1668 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1669
1670 for (i = 0; ; i++) {
1671 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1672 if (!aalg)
1673 break;
7e50f84c
JK		 1674 if (!aalg->pfkey_supported)
1675 continue;
1da177e4
LT		 1676 if (aalg->available)
1677 *ap++ = aalg->desc;
1678 }
1679 }
1680
1681 if (enc_len) {
1682 struct sadb_supported *sp;
1683 struct sadb_alg *ap;
1684
4df864c1 1685 sp = skb_put(skb, enc_len);
1da177e4
LT		 1686 ap = (struct sadb_alg *) (sp + 1);
1687
1688 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1689 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1690
1691 for (i = 0; ; i++) {
1692 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1693 if (!ealg)
1694 break;
7e50f84c
JK		 1695 if (!ealg->pfkey_supported)
1696 continue;
1da177e4
LT		 1697 if (ealg->available)
1698 *ap++ = ealg->desc;
1699 }
1700 }
1701
1702out_put_algs:
1703 return skb;
1704}
1705
4c93fbb0 1706static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1707{
1708 struct pfkey_sock *pfk = pfkey_sk(sk);
1709 struct sk_buff *supp_skb;
1710
1711 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1712 return -EINVAL;
1713
1714 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1715 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1716 return -EEXIST;
1717 pfk->registered |= (1<<hdr->sadb_msg_satype);
1718 }
1719
1720 xfrm_probe_algs();
8ff24541 1721
1da177e4
LT		 1722 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1723 if (!supp_skb) {
1724 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1725 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1726
1727 return -ENOBUFS;
1728 }
1729
36f41f8f
ED		 1730 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1731 sock_net(sk));
1da177e4
LT		 1732 return 0;
1733}
1734
4c93fbb0 1735static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
8be987d7
JHS		 1736{
1737 struct sk_buff *skb;
1738 struct sadb_msg *hdr;
1739
1740 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1741 if (!skb)
1742 return -ENOBUFS;
1743
59ae1d12 1744 hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
8be987d7
JHS		 1745 hdr->sadb_msg_errno = (uint8_t) 0;
1746 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1747
36f41f8f
ED		 1748 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1749 sock_net(sk));
8be987d7
JHS		 1750}
1751
214e005b 1752static int key_notify_sa_flush(const struct km_event *c)
26b15dad
JHS		 1753{
1754 struct sk_buff *skb;
1755 struct sadb_msg *hdr;
1756
1757 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1758 if (!skb)
1759 return -ENOBUFS;
4df864c1 1760 hdr = skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1761 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1762 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad 1763 hdr->sadb_msg_seq = c->seq;
15e47304 1764 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 1765 hdr->sadb_msg_version = PF_KEY_V2;
1766 hdr->sadb_msg_errno = (uint8_t) 0;
1767 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 1768 hdr->sadb_msg_reserved = 0;
26b15dad 1769
36f41f8f 1770 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad
JHS		 1771
1772 return 0;
1773}
1774
4c93fbb0 1775static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1776{
07fb0f17 1777 struct net *net = sock_net(sk);
95c96174 1778 unsigned int proto;
26b15dad 1779 struct km_event c;
8be987d7 1780 int err, err2;
1da177e4
LT		 1781
1782 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1783 if (proto == 0)
1784 return -EINVAL;
1785
2e71029e 1786 err = xfrm_state_flush(net, proto, true);
8be987d7 1787 err2 = unicast_flush_resp(sk, hdr);
9e64cc95
JHS		 1788 if (err || err2) {
1789 if (err == -ESRCH) /* empty table - go quietly */
1790 err = 0;
8be987d7 1791 return err ? err : err2;
9e64cc95 1792 }
8be987d7 1793
bf08867f 1794 c.data.proto = proto;
26b15dad 1795 c.seq = hdr->sadb_msg_seq;
15e47304 1796 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1797 c.event = XFRM_MSG_FLUSHSA;
07fb0f17 1798 c.net = net;
26b15dad 1799 km_state_notify(NULL, &c);
1da177e4
LT		 1800
1801 return 0;
1802}
1803
1da177e4
LT		 1804static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1805{
83321d6b 1806 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 1807 struct sk_buff *out_skb;
1808 struct sadb_msg *out_hdr;
1809
83321d6b
TT		 1810 if (!pfkey_can_dump(&pfk->sk))
1811 return -ENOBUFS;
1812
050f009e 1813 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1814 if (IS_ERR(out_skb))
1815 return PTR_ERR(out_skb);
1816
1817 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 1818 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 1819 out_hdr->sadb_msg_type = SADB_DUMP;
1820 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1821 out_hdr->sadb_msg_errno = 0;
1822 out_hdr->sadb_msg_reserved = 0;
12a169e7 1823 out_hdr->sadb_msg_seq = count + 1;
15e47304 1824 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 1825
1826 if (pfk->dump.skb)
36f41f8f 1827 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 1828 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 1829 pfk->dump.skb = out_skb;
1830
1da177e4
LT		 1831 return 0;
1832}
1833
83321d6b
TT		 1834static int pfkey_dump_sa(struct pfkey_sock *pfk)
1835{
07fb0f17
AD		 1836 struct net *net = sock_net(&pfk->sk);
1837 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
83321d6b
TT		 1838}
1839
1840static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1841{
283bc9f3
FD		 1842 struct net *net = sock_net(&pfk->sk);
1843
1844 xfrm_state_walk_done(&pfk->dump.u.state, net);
83321d6b
TT		 1845}
1846
4c93fbb0 1847static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1848{
1849 u8 proto;
870a2df4 1850 struct xfrm_address_filter *filter = NULL;
83321d6b
TT		 1851 struct pfkey_sock *pfk = pfkey_sk(sk);
1852
89e357d8
YS		 1853 mutex_lock(&pfk->dump_lock);
1854 if (pfk->dump.dump != NULL) {
1855 mutex_unlock(&pfk->dump_lock);
83321d6b 1856 return -EBUSY;
89e357d8 1857 }
1da177e4
LT		 1858
1859 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
89e357d8
YS		 1860 if (proto == 0) {
1861 mutex_unlock(&pfk->dump_lock);
1da177e4 1862 return -EINVAL;
89e357d8 1863 }
1da177e4 1864
d3623099
ND		 1865 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1866 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1867
1868 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
89e357d8
YS		 1869 if (filter == NULL) {
1870 mutex_unlock(&pfk->dump_lock);
d3623099 1871 return -ENOMEM;
89e357d8 1872 }
d3623099
ND		 1873
1874 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1875 sizeof(xfrm_address_t));
1876 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1877 sizeof(xfrm_address_t));
1878 filter->family = xfilter->sadb_x_filter_family;
1879 filter->splen = xfilter->sadb_x_filter_splen;
1880 filter->dplen = xfilter->sadb_x_filter_dplen;
1881 }
1882
83321d6b 1883 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 1884 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 1885 pfk->dump.dump = pfkey_dump_sa;
1886 pfk->dump.done = pfkey_dump_sa_done;
d3623099 1887 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
89e357d8 1888 mutex_unlock(&pfk->dump_lock);
4c563f76 1889
83321d6b 1890 return pfkey_do_dump(pfk);
1da177e4
LT		 1891}
1892
4c93fbb0 1893static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1894{
1895 struct pfkey_sock *pfk = pfkey_sk(sk);
1896 int satype = hdr->sadb_msg_satype;
4c93fbb0 1897 bool reset_errno = false;
1da177e4
LT		 1898
1899 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
4c93fbb0 1900 reset_errno = true;
1da177e4
LT		 1901 if (satype != 0 && satype != 1)
1902 return -EINVAL;
1903 pfk->promisc = satype;
1904 }
4c93fbb0
DM		 1905 if (reset_errno && skb_cloned(skb))
1906 skb = skb_copy(skb, GFP_KERNEL);
1907 else
1908 skb = skb_clone(skb, GFP_KERNEL);
1909
1910 if (reset_errno && skb) {
1911 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1912 new_hdr->sadb_msg_errno = 0;
1913 }
1914
36f41f8f 1915 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1da177e4
LT		 1916 return 0;
1917}
1918
1919static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1920{
1921 int i;
1922 u32 reqid = *(u32*)ptr;
1923
1924 for (i=0; i<xp->xfrm_nr; i++) {
1925 if (xp->xfrm_vec[i].reqid == reqid)
1926 return -EEXIST;
1927 }
1928 return 0;
1929}
1930
07fb0f17 1931static u32 gen_reqid(struct net *net)
1da177e4 1932{
4c563f76 1933 struct xfrm_policy_walk walk;
1da177e4 1934 u32 start;
4c563f76 1935 int rc;
1da177e4
LT		 1936 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1937
1938 start = reqid;
1939 do {
1940 ++reqid;
1941 if (reqid == 0)
1942 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76 1943 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
07fb0f17 1944 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
283bc9f3 1945 xfrm_policy_walk_done(&walk, net);
4c563f76 1946 if (rc != -EEXIST)
1da177e4
LT		 1947 return reqid;
1948 } while (reqid != start);
1949 return 0;
1950}
1951
1952static int
1953parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1954{
07fb0f17 1955 struct net *net = xp_net(xp);
1da177e4 1956 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
55569ce2 1957 int mode;
1da177e4
LT		 1958
1959 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1960 return -ELOOP;
1961
1962 if (rq->sadb_x_ipsecrequest_mode == 0)
1963 return -EINVAL;
1964
1965 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1966 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1967 return -EINVAL;
1968 t->mode = mode;
1da177e4
LT		 1969 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1970 t->optional = 1;
1971 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1972 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1973 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1974 t->reqid = 0;
07fb0f17 1975 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1da177e4
LT		 1976 return -ENOBUFS;
1977 }
1978
1979 /* addresses present only in tunnel mode */
7e49e6de 1980 if (t->mode == XFRM_MODE_TUNNEL) {
096f41d3 1981 int err;
5f95ac91 1982
096f41d3
HX		 1983 err = parse_sockaddr_pair(
1984 (struct sockaddr *)(rq + 1),
1985 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1986 &t->saddr, &t->id.daddr, &t->encap_family);
1987 if (err)
1988 return err;
2718aa7c
MK		 1989 } else
1990 t->encap_family = xp->family;
1991
1da177e4 1992 /* No way to set this via kame pfkey */
c5d18e98 1993 t->allalgs = 1;
1da177e4
LT		 1994 xp->xfrm_nr++;
1995 return 0;
1996}
1997
1998static int
1999parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
2000{
2001 int err;
2002 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
2003 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
2004
f674e72f
DC		 2005 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
2006 return -EINVAL;
2007
096f41d3
HX		 2008 while (len >= sizeof(*rq)) {
2009 if (len < rq->sadb_x_ipsecrequest_len ||
2010 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
2011 return -EINVAL;
2012
1da177e4
LT		 2013 if ((err = parse_ipsecrequest(xp, rq)) < 0)
2014 return err;
2015 len -= rq->sadb_x_ipsecrequest_len;
2016 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2017 }
2018 return 0;
2019}
2020
4c93fbb0 2021static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
df71837d
TJ		 2022{
2023 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
2024
2025 if (xfrm_ctx) {
2026 int len = sizeof(struct sadb_x_sec_ctx);
2027 len += xfrm_ctx->ctx_len;
2028 return PFKEY_ALIGN8(len);
2029 }
2030 return 0;
2031}
2032
4c93fbb0 2033static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1da177e4 2034{
4c93fbb0 2035 const struct xfrm_tmpl *t;
1da177e4 2036 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 2037 int socklen = 0;
2038 int i;
2039
2040 for (i=0; i<xp->xfrm_nr; i++) {
2041 t = xp->xfrm_vec + i;
9e8b4ed8 2042 socklen += pfkey_sockaddr_len(t->encap_family);
2718aa7c 2043 }
1da177e4
LT		 2044
2045 return sizeof(struct sadb_msg) +
2046 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 2047 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 2048 (sockaddr_size * 2) +
2049 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 2050 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2051 (socklen * 2) +
df71837d 2052 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 2053}
2054
4c93fbb0 2055static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1da177e4
LT		 2056{
2057 struct sk_buff *skb;
2058 int size;
2059
2060 size = pfkey_xfrm_policy2msg_size(xp);
2061
2062 skb = alloc_skb(size + 16, GFP_ATOMIC);
2063 if (skb == NULL)
2064 return ERR_PTR(-ENOBUFS);
2065
2066 return skb;
2067}
2068
4c93fbb0 2069static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
1da177e4
LT		 2070{
2071 struct sadb_msg *hdr;
2072 struct sadb_address *addr;
2073 struct sadb_lifetime *lifetime;
2074 struct sadb_x_policy *pol;
df71837d
TJ		 2075 struct sadb_x_sec_ctx *sec_ctx;
2076 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 2077 int i;
2078 int size;
2079 int sockaddr_size = pfkey_sockaddr_size(xp->family);
9e8b4ed8 2080 int socklen = pfkey_sockaddr_len(xp->family);
1da177e4
LT		 2081
2082 size = pfkey_xfrm_policy2msg_size(xp);
2083
2084 /* call should fill header later */
4df864c1 2085 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 2086 memset(hdr, 0, size); /* XXX do we need this ? */
2087
2088 /* src address */
4df864c1 2089 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 2090 addr->sadb_address_len =
1da177e4
LT		 2091 (sizeof(struct sadb_address)+sockaddr_size)/
2092 sizeof(uint64_t);
2093 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2094 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2095 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2096 addr->sadb_address_reserved = 0;
e5b56652
YH		 2097 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2098 xp->selector.sport,
2099 (struct sockaddr *) (addr + 1),
2100 xp->family))
1da177e4
LT		 2101 BUG();
2102
2103 /* dst address */
4df864c1 2104 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
1da177e4
LT		 2105 addr->sadb_address_len =
2106 (sizeof(struct sadb_address)+sockaddr_size)/
2107 sizeof(uint64_t);
2108 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2109 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2110 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4 2111 addr->sadb_address_reserved = 0;
e5b56652
YH		 2112
2113 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2114 (struct sockaddr *) (addr + 1),
2115 xp->family);
1da177e4
LT		 2116
2117 /* hard time */
4df864c1 2118 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 2119 lifetime->sadb_lifetime_len =
2120 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2121 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2122 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2123 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2124 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2125 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2126 /* soft time */
4df864c1 2127 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 2128 lifetime->sadb_lifetime_len =
2129 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2130 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2131 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2132 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2133 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2134 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2135 /* current time */
4df864c1 2136 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 2137 lifetime->sadb_lifetime_len =
2138 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2139 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2140 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2141 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2142 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2143 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2144
4df864c1 2145 pol = skb_put(skb, sizeof(struct sadb_x_policy));
1da177e4
LT		 2146 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2147 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2148 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2149 if (xp->action == XFRM_POLICY_ALLOW) {
2150 if (xp->xfrm_nr)
2151 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2152 else
2153 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2154 }
2155 pol->sadb_x_policy_dir = dir+1;
ff862a46 2156 pol->sadb_x_policy_reserved = 0;
1da177e4
LT		 2157 pol->sadb_x_policy_id = xp->index;
2158 pol->sadb_x_policy_priority = xp->priority;
2159
2160 for (i=0; i<xp->xfrm_nr; i++) {
4c93fbb0 2161 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
1da177e4 2162 struct sadb_x_ipsecrequest *rq;
1da177e4 2163 int req_size;
55569ce2 2164 int mode;
1da177e4
LT		 2165
2166 req_size = sizeof(struct sadb_x_ipsecrequest);
e5b56652
YH		 2167 if (t->mode == XFRM_MODE_TUNNEL) {
2168 socklen = pfkey_sockaddr_len(t->encap_family);
2169 req_size += socklen * 2;
2170 } else {
1da177e4 2171 size -= 2*socklen;
e5b56652 2172 }
4df864c1 2173 rq = skb_put(skb, req_size);
1da177e4
LT		 2174 pol->sadb_x_policy_len += req_size/8;
2175 memset(rq, 0, sizeof(*rq));
2176 rq->sadb_x_ipsecrequest_len = req_size;
2177 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2178 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2179 return -EINVAL;
fefaa75e 2180 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2181 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2182 if (t->reqid)
2183 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2184 if (t->optional)
2185 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2186 rq->sadb_x_ipsecrequest_reqid = t->reqid;
e5b56652 2187
7e49e6de 2188 if (t->mode == XFRM_MODE_TUNNEL) {
e5b56652
YH		 2189 u8 *sa = (void *)(rq + 1);
2190 pfkey_sockaddr_fill(&t->saddr, 0,
2191 (struct sockaddr *)sa,
2192 t->encap_family);
2193 pfkey_sockaddr_fill(&t->id.daddr, 0,
2194 (struct sockaddr *) (sa + socklen),
2195 t->encap_family);
1da177e4
LT		 2196 }
2197 }
df71837d
TJ		 2198
2199 /* security context */
2200 if ((xfrm_ctx = xp->security)) {
2201 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2202
4df864c1 2203 sec_ctx = skb_put(skb, ctx_size);
df71837d
TJ		 2204 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2205 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2206 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2207 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2208 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2209 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2210 xfrm_ctx->ctx_len);
2211 }
2212
1da177e4 2213 hdr->sadb_msg_len = size / sizeof(uint64_t);
850a6212 2214 hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
55569ce2
KM		 2215
2216 return 0;
1da177e4
LT		 2217}
2218
214e005b 2219static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2220{
2221 struct sk_buff *out_skb;
2222 struct sadb_msg *out_hdr;
2223 int err;
2224
2225 out_skb = pfkey_xfrm_policy2msg_prep(xp);
9a127aad
DC		 2226 if (IS_ERR(out_skb))
2227 return PTR_ERR(out_skb);
2228
55569ce2 2229 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
1e532d2b
SK		 2230 if (err < 0) {
2231 kfree_skb(out_skb);
55569ce2 2232 return err;
1e532d2b 2233 }
26b15dad
JHS		 2234
2235 out_hdr = (struct sadb_msg *) out_skb->data;
2236 out_hdr->sadb_msg_version = PF_KEY_V2;
2237
f60f6b8f 2238 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2239 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2240 else
2241 out_hdr->sadb_msg_type = event2poltype(c->event);
2242 out_hdr->sadb_msg_errno = 0;
2243 out_hdr->sadb_msg_seq = c->seq;
15e47304 2244 out_hdr->sadb_msg_pid = c->portid;
36f41f8f 2245 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
26b15dad
JHS		 2246 return 0;
2247
2248}
2249
4c93fbb0 2250static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2251{
07fb0f17 2252 struct net *net = sock_net(sk);
df71837d 2253 int err = 0;
1da177e4
LT		 2254 struct sadb_lifetime *lifetime;
2255 struct sadb_address *sa;
2256 struct sadb_x_policy *pol;
2257 struct xfrm_policy *xp;
26b15dad 2258 struct km_event c;
df71837d 2259 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2260
2261 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2262 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2263 !ext_hdrs[SADB_X_EXT_POLICY-1])
2264 return -EINVAL;
2265
2266 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2267 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2268 return -EINVAL;
2269 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2270 return -EINVAL;
2271
07fb0f17 2272 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2273 if (xp == NULL)
2274 return -ENOBUFS;
2275
2276 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2277 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2278 xp->priority = pol->sadb_x_policy_priority;
2279
d0d79c3f 2280 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4 2281 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
1da177e4
LT		 2282 xp->selector.family = xp->family;
2283 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2284 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2285 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2286 if (xp->selector.sport)
8f83f23e 2287 xp->selector.sport_mask = htons(0xffff);
1da177e4 2288
d0d79c3f 2289 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2290 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2291 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2292
2293 /* Amusing, we set this twice. KAME apps appear to set same value
2294 * in both addresses.
2295 */
2296 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2297
2298 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2299 if (xp->selector.dport)
8f83f23e 2300 xp->selector.dport_mask = htons(0xffff);
1da177e4 2301
ea110733 2302 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2303 if (sec_ctx != NULL) {
87536a81 2304 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2305
2306 if (!uctx) {
2307 err = -ENOBUFS;
2308 goto out;
2309 }
2310
52a4c640 2311 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
df71837d
TJ		 2312 kfree(uctx);
2313
2314 if (err)
2315 goto out;
2316 }
2317
1da177e4
LT		 2318 xp->lft.soft_byte_limit = XFRM_INF;
2319 xp->lft.hard_byte_limit = XFRM_INF;
2320 xp->lft.soft_packet_limit = XFRM_INF;
2321 xp->lft.hard_packet_limit = XFRM_INF;
2322 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2323 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2324 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2325 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2326 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2327 }
2328 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2329 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2330 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2331 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2332 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2333 }
2334 xp->xfrm_nr = 0;
2335 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2336 (err = parse_ipsecrequests(xp, pol)) < 0)
2337 goto out;
2338
1da177e4
LT		 2339 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2340 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2341
2e71029e 2342 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 2343
df71837d
TJ		 2344 if (err)
2345 goto out;
1da177e4 2346
26b15dad 2347 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2348 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2349 else
f60f6b8f 2350 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2351
26b15dad 2352 c.seq = hdr->sadb_msg_seq;
15e47304 2353 c.portid = hdr->sadb_msg_pid;
1da177e4 2354
26b15dad
JHS		 2355 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2356 xfrm_pol_put(xp);
1da177e4
LT		 2357 return 0;
2358
2359out:
12a169e7 2360 xp->walk.dead = 1;
64c31b3f 2361 xfrm_policy_destroy(xp);
1da177e4
LT		 2362 return err;
2363}
2364
4c93fbb0 2365static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2366{
07fb0f17 2367 struct net *net = sock_net(sk);
1da177e4
LT		 2368 int err;
2369 struct sadb_address *sa;
2370 struct sadb_x_policy *pol;
03e1ad7b 2371 struct xfrm_policy *xp;
1da177e4 2372 struct xfrm_selector sel;
26b15dad 2373 struct km_event c;
df71837d 2374 struct sadb_x_sec_ctx *sec_ctx;
2db3e47e 2375 struct xfrm_sec_ctx *pol_ctx = NULL;
1da177e4
LT		 2376
2377 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2378 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2379 !ext_hdrs[SADB_X_EXT_POLICY-1])
2380 return -EINVAL;
2381
2382 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2383 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2384 return -EINVAL;
2385
2386 memset(&sel, 0, sizeof(sel));
2387
d0d79c3f 2388 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4
LT		 2389 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2390 sel.prefixlen_s = sa->sadb_address_prefixlen;
2391 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2392 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2393 if (sel.sport)
8f83f23e 2394 sel.sport_mask = htons(0xffff);
1da177e4 2395
d0d79c3f 2396 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2397 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2398 sel.prefixlen_d = sa->sadb_address_prefixlen;
2399 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2400 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2401 if (sel.dport)
8f83f23e 2402 sel.dport_mask = htons(0xffff);
1da177e4 2403
ea110733 2404 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2405 if (sec_ctx != NULL) {
87536a81 2406 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2407
2408 if (!uctx)
2409 return -ENOMEM;
2410
52a4c640 2411 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
df71837d 2412 kfree(uctx);
df71837d
TJ		 2413 if (err)
2414 return err;
2db3e47e 2415 }
161a09e7 2416
7e652640 2417 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, 0, XFRM_POLICY_TYPE_MAIN,
03e1ad7b
PM		 2418 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2419 1, &err);
2420 security_xfrm_policy_free(pol_ctx);
1da177e4
LT		 2421 if (xp == NULL)
2422 return -ENOENT;
2423
2e71029e 2424 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 2425
2426 if (err)
c8c05a8e 2427 goto out;
13fcfbb0 2428
26b15dad 2429 c.seq = hdr->sadb_msg_seq;
15e47304 2430 c.portid = hdr->sadb_msg_pid;
1839faab 2431 c.data.byid = 0;
f60f6b8f 2432 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2433 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2434
c8c05a8e 2435out:
26b15dad
JHS		 2436 xfrm_pol_put(xp);
2437 return err;
2438}
2439
4c93fbb0 2440static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
26b15dad
JHS		 2441{
2442 int err;
2443 struct sk_buff *out_skb;
2444 struct sadb_msg *out_hdr;
2445 err = 0;
2446
1da177e4
LT		 2447 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2448 if (IS_ERR(out_skb)) {
2449 err = PTR_ERR(out_skb);
2450 goto out;
2451 }
55569ce2
KM		 2452 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2453 if (err < 0)
2454 goto out;
1da177e4
LT		 2455
2456 out_hdr = (struct sadb_msg *) out_skb->data;
2457 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2458 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2459 out_hdr->sadb_msg_satype = 0;
2460 out_hdr->sadb_msg_errno = 0;
2461 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2462 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
36f41f8f 2463 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
1da177e4
LT		 2464 err = 0;
2465
2466out:
1da177e4
LT		 2467 return err;
2468}
2469
08de61be
SS		 2470static int pfkey_sockaddr_pair_size(sa_family_t family)
2471{
9e8b4ed8 2472 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
08de61be
SS		 2473}
2474
13c1d189 2475static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
08de61be
SS		 2476 xfrm_address_t *saddr, xfrm_address_t *daddr,
2477 u16 *family)
2478{
5f95ac91
YH		 2479 int af, socklen;
2480
096f41d3 2481 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
08de61be
SS		 2482 return -EINVAL;
2483
13c1d189 2484 af = pfkey_sockaddr_extract(sa, saddr);
5f95ac91
YH		 2485 if (!af)
2486 return -EINVAL;
2487
2488 socklen = pfkey_sockaddr_len(af);
13c1d189 2489 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
5f95ac91 2490 daddr) != af)
08de61be 2491 return -EINVAL;
08de61be 2492
5f95ac91 2493 *family = af;
08de61be
SS		 2494 return 0;
2495}
2496
096f41d3 2497#ifdef CONFIG_NET_KEY_MIGRATE
08de61be
SS		 2498static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2499 struct xfrm_migrate *m)
2500{
2501 int err;
2502 struct sadb_x_ipsecrequest *rq2;
55569ce2 2503 int mode;
08de61be 2504
096f41d3
HX		 2505 if (len < sizeof(*rq1) ||
2506 len < rq1->sadb_x_ipsecrequest_len ||
2507 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
08de61be
SS		 2508 return -EINVAL;
2509
2510 /* old endoints */
13c1d189 2511 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
096f41d3 2512 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
13c1d189 2513 &m->old_saddr, &m->old_daddr,
08de61be
SS		 2514 &m->old_family);
2515 if (err)
2516 return err;
2517
2518 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2519 len -= rq1->sadb_x_ipsecrequest_len;
2520
096f41d3
HX		 2521 if (len <= sizeof(*rq2) ||
2522 len < rq2->sadb_x_ipsecrequest_len ||
2523 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
08de61be
SS		 2524 return -EINVAL;
2525
2526 /* new endpoints */
13c1d189 2527 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
096f41d3 2528 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
13c1d189 2529 &m->new_saddr, &m->new_daddr,
08de61be
SS		 2530 &m->new_family);
2531 if (err)
2532 return err;
2533
2534 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2535 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2536 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2537 return -EINVAL;
2538
2539 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2540 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2541 return -EINVAL;
2542 m->mode = mode;
08de61be
SS		 2543 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2544
2545 return ((int)(rq1->sadb_x_ipsecrequest_len +
2546 rq2->sadb_x_ipsecrequest_len));
2547}
2548
2549static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2550 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2551{
2552 int i, len, ret, err = -EINVAL;
2553 u8 dir;
2554 struct sadb_address *sa;
13c1d189 2555 struct sadb_x_kmaddress *kma;
08de61be
SS		 2556 struct sadb_x_policy *pol;
2557 struct sadb_x_ipsecrequest *rq;
2558 struct xfrm_selector sel;
2559 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2560 struct xfrm_kmaddress k;
8d549c4f 2561 struct net *net = sock_net(sk);
08de61be
SS		 2562
2563 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
13c1d189 2564 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
08de61be
SS		 2565 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2566 err = -EINVAL;
2567 goto out;
2568 }
2569
13c1d189 2570 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
08de61be 2571 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
08de61be
SS		 2572
2573 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2574 err = -EINVAL;
2575 goto out;
2576 }
2577
13c1d189
AE		 2578 if (kma) {
2579 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2580 k.reserved = kma->sadb_x_kmaddress_reserved;
2581 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2582 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2583 &k.local, &k.remote, &k.family);
2584 if (ret < 0) {
2585 err = ret;
2586 goto out;
2587 }
2588 }
2589
08de61be
SS		 2590 dir = pol->sadb_x_policy_dir - 1;
2591 memset(&sel, 0, sizeof(sel));
2592
2593 /* set source address info of selector */
2594 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2595 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2596 sel.prefixlen_s = sa->sadb_address_prefixlen;
2597 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2598 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2599 if (sel.sport)
582ee43d 2600 sel.sport_mask = htons(0xffff);
08de61be
SS		 2601
2602 /* set destination address info of selector */
47162c0b 2603 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
08de61be
SS		 2604 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2605 sel.prefixlen_d = sa->sadb_address_prefixlen;
2606 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2607 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2608 if (sel.dport)
582ee43d 2609 sel.dport_mask = htons(0xffff);
08de61be
SS		 2610
2611 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2612
2613 /* extract ipsecrequests */
2614 i = 0;
2615 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2616
2617 while (len > 0 && i < XFRM_MAX_DEPTH) {
2618 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2619 if (ret < 0) {
2620 err = ret;
2621 goto out;
2622 } else {
2623 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2624 len -= ret;
2625 i++;
2626 }
2627 }
2628
2629 if (!i || len > 0) {
2630 err = -EINVAL;
2631 goto out;
2632 }
2633
13c1d189 2634 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
4ab47d47 2635 kma ? &k : NULL, net, NULL);
08de61be
SS		 2636
2637 out:
2638 return err;
2639}
2640#else
2641static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
7f6daa63 2642 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2643{
2644 return -ENOPROTOOPT;
2645}
2646#endif
2647
2648
4c93fbb0 2649static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2650{
07fb0f17 2651 struct net *net = sock_net(sk);
77d8d7a6 2652 unsigned int dir;
215a2dd3 2653 int err = 0, delete;
1da177e4
LT		 2654 struct sadb_x_policy *pol;
2655 struct xfrm_policy *xp;
26b15dad 2656 struct km_event c;
1da177e4
LT		 2657
2658 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2659 return -EINVAL;
2660
77d8d7a6
HX		 2661 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2662 if (dir >= XFRM_POLICY_MAX)
2663 return -EINVAL;
2664
215a2dd3 2665 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
7e652640 2666 xp = xfrm_policy_byid(net, DUMMY_MARK, 0, XFRM_POLICY_TYPE_MAIN,
bd55775c 2667 dir, pol->sadb_x_policy_id, delete, &err);
1da177e4
LT		 2668 if (xp == NULL)
2669 return -ENOENT;
2670
215a2dd3 2671 if (delete) {
2e71029e 2672 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1da177e4 2673
215a2dd3
EP		 2674 if (err)
2675 goto out;
2676 c.seq = hdr->sadb_msg_seq;
15e47304 2677 c.portid = hdr->sadb_msg_pid;
bf08867f 2678 c.data.byid = 1;
f60f6b8f 2679 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2680 km_policy_notify(xp, dir, &c);
26b15dad 2681 } else {
77d8d7a6 2682 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2683 }
1da177e4 2684
215a2dd3 2685out:
1da177e4
LT		 2686 xfrm_pol_put(xp);
2687 return err;
2688}
2689
2690static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2691{
83321d6b 2692 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 2693 struct sk_buff *out_skb;
2694 struct sadb_msg *out_hdr;
55569ce2 2695 int err;
1da177e4 2696
83321d6b
TT		 2697 if (!pfkey_can_dump(&pfk->sk))
2698 return -ENOBUFS;
2699
1da177e4
LT		 2700 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2701 if (IS_ERR(out_skb))
2702 return PTR_ERR(out_skb);
2703
55569ce2
KM		 2704 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2705 if (err < 0)
2706 return err;
1da177e4
LT		 2707
2708 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 2709 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 2710 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2711 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2712 out_hdr->sadb_msg_errno = 0;
12a169e7 2713 out_hdr->sadb_msg_seq = count + 1;
15e47304 2714 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 2715
2716 if (pfk->dump.skb)
36f41f8f 2717 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 2718 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 2719 pfk->dump.skb = out_skb;
2720
1da177e4
LT		 2721 return 0;
2722}
2723
83321d6b
TT		 2724static int pfkey_dump_sp(struct pfkey_sock *pfk)
2725{
07fb0f17
AD		 2726 struct net *net = sock_net(&pfk->sk);
2727 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
83321d6b
TT		 2728}
2729
2730static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2731{
283bc9f3
FD		 2732 struct net *net = sock_net((struct sock *)pfk);
2733
2734 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
83321d6b
TT		 2735}
2736
4c93fbb0 2737static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2738{
83321d6b 2739 struct pfkey_sock *pfk = pfkey_sk(sk);
4c563f76 2740
89e357d8
YS		 2741 mutex_lock(&pfk->dump_lock);
2742 if (pfk->dump.dump != NULL) {
2743 mutex_unlock(&pfk->dump_lock);
83321d6b 2744 return -EBUSY;
89e357d8 2745 }
1da177e4 2746
83321d6b 2747 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 2748 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 2749 pfk->dump.dump = pfkey_dump_sp;
2750 pfk->dump.done = pfkey_dump_sp_done;
2751 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
89e357d8 2752 mutex_unlock(&pfk->dump_lock);
83321d6b
TT		 2753
2754 return pfkey_do_dump(pfk);
1da177e4
LT		 2755}
2756
214e005b 2757static int key_notify_policy_flush(const struct km_event *c)
1da177e4
LT		 2758{
2759 struct sk_buff *skb_out;
26b15dad 2760 struct sadb_msg *hdr;
1da177e4 2761
26b15dad 2762 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2763 if (!skb_out)
2764 return -ENOBUFS;
4df864c1 2765 hdr = skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2766 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad 2767 hdr->sadb_msg_seq = c->seq;
15e47304 2768 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 2769 hdr->sadb_msg_version = PF_KEY_V2;
2770 hdr->sadb_msg_errno = (uint8_t) 0;
85dfb745 2771 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
26b15dad 2772 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 2773 hdr->sadb_msg_reserved = 0;
36f41f8f 2774 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad 2775 return 0;
1da177e4 2776
26b15dad
JHS		 2777}
2778
4c93fbb0 2779static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
26b15dad 2780{
07fb0f17 2781 struct net *net = sock_net(sk);
26b15dad 2782 struct km_event c;
8be987d7 2783 int err, err2;
1da177e4 2784
2e71029e 2785 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
8be987d7 2786 err2 = unicast_flush_resp(sk, hdr);
2f1eb65f
JHS		 2787 if (err || err2) {
2788 if (err == -ESRCH) /* empty table - old silent behavior */
2789 return 0;
2790 return err;
2791 }
8be987d7 2792
f7b6983f 2793 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2794 c.event = XFRM_MSG_FLUSHPOLICY;
15e47304 2795 c.portid = hdr->sadb_msg_pid;
26b15dad 2796 c.seq = hdr->sadb_msg_seq;
07fb0f17 2797 c.net = net;
26b15dad 2798 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2799
2800 return 0;
2801}
2802
2803typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2804 const struct sadb_msg *hdr, void * const *ext_hdrs);
8603b955 2805static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
1da177e4
LT		 2806 [SADB_RESERVED] = pfkey_reserved,
2807 [SADB_GETSPI] = pfkey_getspi,
2808 [SADB_UPDATE] = pfkey_add,
2809 [SADB_ADD] = pfkey_add,
2810 [SADB_DELETE] = pfkey_delete,
2811 [SADB_GET] = pfkey_get,
2812 [SADB_ACQUIRE] = pfkey_acquire,
2813 [SADB_REGISTER] = pfkey_register,
2814 [SADB_EXPIRE] = NULL,
2815 [SADB_FLUSH] = pfkey_flush,
2816 [SADB_DUMP] = pfkey_dump,
2817 [SADB_X_PROMISC] = pfkey_promisc,
2818 [SADB_X_PCHANGE] = NULL,
2819 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2820 [SADB_X_SPDADD] = pfkey_spdadd,
2821 [SADB_X_SPDDELETE] = pfkey_spddelete,
2822 [SADB_X_SPDGET] = pfkey_spdget,
2823 [SADB_X_SPDACQUIRE] = NULL,
2824 [SADB_X_SPDDUMP] = pfkey_spddump,
2825 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2826 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2827 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2828 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2829};
2830
4c93fbb0 2831static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
1da177e4
LT		 2832{
2833 void *ext_hdrs[SADB_EXT_MAX];
2834 int err;
2835
36f41f8f 2836 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
07fb0f17 2837 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
1da177e4
LT		 2838
2839 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2840 err = parse_exthdrs(skb, hdr, ext_hdrs);
2841 if (!err) {
2842 err = -EOPNOTSUPP;
2843 if (pfkey_funcs[hdr->sadb_msg_type])
2844 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2845 }
2846 return err;
2847}
2848
2849static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2850{
2851 struct sadb_msg *hdr = NULL;
2852
2853 if (skb->len < sizeof(*hdr)) {
2854 *errp = -EMSGSIZE;
2855 } else {
2856 hdr = (struct sadb_msg *) skb->data;
2857 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2858 hdr->sadb_msg_reserved != 0 ||
2859 (hdr->sadb_msg_type <= SADB_RESERVED ||
2860 hdr->sadb_msg_type > SADB_MAX)) {
2861 hdr = NULL;
2862 *errp = -EINVAL;
2863 } else if (hdr->sadb_msg_len != (skb->len /
2864 sizeof(uint64_t)) ||
2865 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2866 sizeof(uint64_t))) {
2867 hdr = NULL;
2868 *errp = -EMSGSIZE;
2869 } else {
2870 *errp = 0;
2871 }
2872 }
2873 return hdr;
2874}
2875
4c93fbb0
DM		 2876static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2877 const struct xfrm_algo_desc *d)
1da177e4 2878{
f398035f
HX		 2879 unsigned int id = d->desc.sadb_alg_id;
2880
2881 if (id >= sizeof(t->aalgos) * 8)
2882 return 0;
2883
2884 return (t->aalgos >> id) & 1;
1da177e4
LT		 2885}
2886
4c93fbb0
DM		 2887static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2888 const struct xfrm_algo_desc *d)
1da177e4 2889{
f398035f
HX		 2890 unsigned int id = d->desc.sadb_alg_id;
2891
2892 if (id >= sizeof(t->ealgos) * 8)
2893 return 0;
2894
2895 return (t->ealgos >> id) & 1;
1da177e4
LT		 2896}
2897
4c93fbb0 2898static int count_ah_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2899{
2900 int i, sz = 0;
2901
2902 for (i = 0; ; i++) {
4c93fbb0 2903 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2904 if (!aalg)
2905 break;
7e50f84c
JK		 2906 if (!aalg->pfkey_supported)
2907 continue;
1da177e4
LT		 2908 if (aalg_tmpl_set(t, aalg) && aalg->available)
2909 sz += sizeof(struct sadb_comb);
2910 }
2911 return sz + sizeof(struct sadb_prop);
2912}
2913
4c93fbb0 2914static int count_esp_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2915{
2916 int i, k, sz = 0;
2917
2918 for (i = 0; ; i++) {
4c93fbb0 2919 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2920 if (!ealg)
2921 break;
8ff24541 2922
7e50f84c
JK		 2923 if (!ealg->pfkey_supported)
2924 continue;
2925
1da177e4
LT		 2926 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2927 continue;
8ff24541 2928
1da177e4 2929 for (k = 1; ; k++) {
4c93fbb0 2930 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2931 if (!aalg)
2932 break;
8ff24541 2933
7e50f84c
JK		 2934 if (!aalg->pfkey_supported)
2935 continue;
2936
1da177e4
LT		 2937 if (aalg_tmpl_set(t, aalg) && aalg->available)
2938 sz += sizeof(struct sadb_comb);
2939 }
2940 }
2941 return sz + sizeof(struct sadb_prop);
2942}
2943
4c93fbb0 2944static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2945{
2946 struct sadb_prop *p;
2947 int i;
2948
4df864c1 2949 p = skb_put(skb, sizeof(struct sadb_prop));
1da177e4
LT		 2950 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2951 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2952 p->sadb_prop_replay = 32;
2953 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2954
2955 for (i = 0; ; i++) {
4c93fbb0 2956 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2957 if (!aalg)
2958 break;
2959
7e50f84c
JK		 2960 if (!aalg->pfkey_supported)
2961 continue;
2962
1da177e4
LT		 2963 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2964 struct sadb_comb *c;
b080db58 2965 c = skb_put_zero(skb, sizeof(struct sadb_comb));
1da177e4
LT		 2966 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2967 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2968 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2969 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2970 c->sadb_comb_hard_addtime = 24*60*60;
2971 c->sadb_comb_soft_addtime = 20*60*60;
2972 c->sadb_comb_hard_usetime = 8*60*60;
2973 c->sadb_comb_soft_usetime = 7*60*60;
2974 }
2975 }
2976}
2977
4c93fbb0 2978static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2979{
2980 struct sadb_prop *p;
2981 int i, k;
2982
4df864c1 2983 p = skb_put(skb, sizeof(struct sadb_prop));
1da177e4
LT		 2984 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2985 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2986 p->sadb_prop_replay = 32;
2987 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2988
2989 for (i=0; ; i++) {
4c93fbb0 2990 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2991 if (!ealg)
2992 break;
8ff24541 2993
7e50f84c
JK		 2994 if (!ealg->pfkey_supported)
2995 continue;
2996
1da177e4
LT		 2997 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2998 continue;
8ff24541 2999
1da177e4
LT		 3000 for (k = 1; ; k++) {
3001 struct sadb_comb *c;
4c93fbb0 3002 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 3003 if (!aalg)
3004 break;
7e50f84c
JK		 3005 if (!aalg->pfkey_supported)
3006 continue;
1da177e4
LT		 3007 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3008 continue;
4df864c1 3009 c = skb_put(skb, sizeof(struct sadb_comb));
1da177e4
LT		 3010 memset(c, 0, sizeof(*c));
3011 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3012 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3013 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3014 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3015 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3016 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3017 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3018 c->sadb_comb_hard_addtime = 24*60*60;
3019 c->sadb_comb_soft_addtime = 20*60*60;
3020 c->sadb_comb_hard_usetime = 8*60*60;
3021 c->sadb_comb_soft_usetime = 7*60*60;
3022 }
3023 }
3024}
3025
214e005b 3026static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
26b15dad
JHS		 3027{
3028 return 0;
3029}
3030
214e005b 3031static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 3032{
3033 struct sk_buff *out_skb;
3034 struct sadb_msg *out_hdr;
26b15dad
JHS		 3035 int hard;
3036 int hsc;
3037
bf08867f 3038 hard = c->data.hard;
26b15dad
JHS		 3039 if (hard)
3040 hsc = 2;
3041 else
3042 hsc = 1;
1da177e4 3043
050f009e 3044 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 3045 if (IS_ERR(out_skb))
3046 return PTR_ERR(out_skb);
3047
3048 out_hdr = (struct sadb_msg *) out_skb->data;
3049 out_hdr->sadb_msg_version = PF_KEY_V2;
3050 out_hdr->sadb_msg_type = SADB_EXPIRE;
3051 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3052 out_hdr->sadb_msg_errno = 0;
3053 out_hdr->sadb_msg_reserved = 0;
3054 out_hdr->sadb_msg_seq = 0;
3055 out_hdr->sadb_msg_pid = 0;
3056
36f41f8f
ED		 3057 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3058 xs_net(x));
1da177e4
LT		 3059 return 0;
3060}
3061
214e005b 3062static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad 3063{
07fb0f17 3064 struct net *net = x ? xs_net(x) : c->net;
3fa87a32
AD		 3065 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3066
3067 if (atomic_read(&net_pfkey->socks_nr) == 0)
99c6f60e
JHS		 3068 return 0;
3069
26b15dad 3070 switch (c->event) {
f60f6b8f 3071 case XFRM_MSG_EXPIRE:
26b15dad 3072 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 3073 case XFRM_MSG_DELSA:
3074 case XFRM_MSG_NEWSA:
3075 case XFRM_MSG_UPDSA:
26b15dad 3076 return key_notify_sa(x, c);
f60f6b8f 3077 case XFRM_MSG_FLUSHSA:
26b15dad 3078 return key_notify_sa_flush(c);
d51d081d
JHS		 3079 case XFRM_MSG_NEWAE: /* not yet supported */
3080 break;
26b15dad 3081 default:
207024b9 3082 pr_err("pfkey: Unknown SA event %d\n", c->event);
26b15dad
JHS		 3083 break;
3084 }
3085
3086 return 0;
3087}
3088
214e005b 3089static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 3090{
f7b6983f
MN		 3091 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3092 return 0;
3093
26b15dad 3094 switch (c->event) {
f60f6b8f 3095 case XFRM_MSG_POLEXPIRE:
26b15dad 3096 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 3097 case XFRM_MSG_DELPOLICY:
3098 case XFRM_MSG_NEWPOLICY:
3099 case XFRM_MSG_UPDPOLICY:
26b15dad 3100 return key_notify_policy(xp, dir, c);
f60f6b8f 3101 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 3102 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3103 break;
26b15dad
JHS		 3104 return key_notify_policy_flush(c);
3105 default:
207024b9 3106 pr_err("pfkey: Unknown policy event %d\n", c->event);
26b15dad
JHS		 3107 break;
3108 }
3109
3110 return 0;
3111}
3112
1da177e4
LT		 3113static u32 get_acqseq(void)
3114{
3115 u32 res;
28aecb9d 3116 static atomic_t acqseq;
1da177e4 3117
28aecb9d
ED		 3118 do {
3119 res = atomic_inc_return(&acqseq);
3120 } while (!res);
1da177e4
LT		 3121 return res;
3122}
3123
0f24558e
HG		 3124static bool pfkey_is_alive(const struct km_event *c)
3125{
3126 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3127 struct sock *sk;
3128 bool is_alive = false;
3129
3130 rcu_read_lock();
3131 sk_for_each_rcu(sk, &net_pfkey->table) {
3132 if (pfkey_sk(sk)->registered) {
3133 is_alive = true;
3134 break;
3135 }
3136 }
3137 rcu_read_unlock();
3138
3139 return is_alive;
3140}
3141
65e0736b 3142static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
1da177e4
LT		 3143{
3144 struct sk_buff *skb;
3145 struct sadb_msg *hdr;
3146 struct sadb_address *addr;
3147 struct sadb_x_policy *pol;
1da177e4
LT		 3148 int sockaddr_size;
3149 int size;
4e2ba18e
VY		 3150 struct sadb_x_sec_ctx *sec_ctx;
3151 struct xfrm_sec_ctx *xfrm_ctx;
3152 int ctx_size = 0;
8ff24541 3153
1da177e4
LT		 3154 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3155 if (!sockaddr_size)
3156 return -EINVAL;
3157
3158 size = sizeof(struct sadb_msg) +
3159 (sizeof(struct sadb_address) * 2) +
3160 (sockaddr_size * 2) +
3161 sizeof(struct sadb_x_policy);
8ff24541 3162
1da177e4
LT		 3163 if (x->id.proto == IPPROTO_AH)
3164 size += count_ah_combs(t);
3165 else if (x->id.proto == IPPROTO_ESP)
3166 size += count_esp_combs(t);
3167
4e2ba18e
VY		 3168 if ((xfrm_ctx = x->security)) {
3169 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3170 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3171 }
3172
1da177e4
LT		 3173 skb = alloc_skb(size + 16, GFP_ATOMIC);
3174 if (skb == NULL)
3175 return -ENOMEM;
8ff24541 3176
4df864c1 3177 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 3178 hdr->sadb_msg_version = PF_KEY_V2;
3179 hdr->sadb_msg_type = SADB_ACQUIRE;
3180 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3181 hdr->sadb_msg_len = size / sizeof(uint64_t);
3182 hdr->sadb_msg_errno = 0;
3183 hdr->sadb_msg_reserved = 0;
3184 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3185 hdr->sadb_msg_pid = 0;
3186
3187 /* src address */
4df864c1 3188 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 3189 addr->sadb_address_len =
1da177e4
LT		 3190 (sizeof(struct sadb_address)+sockaddr_size)/
3191 sizeof(uint64_t);
3192 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3193 addr->sadb_address_proto = 0;
3194 addr->sadb_address_reserved = 0;
e5b56652
YH		 3195 addr->sadb_address_prefixlen =
3196 pfkey_sockaddr_fill(&x->props.saddr, 0,
3197 (struct sockaddr *) (addr + 1),
3198 x->props.family);
3199 if (!addr->sadb_address_prefixlen)
1da177e4 3200 BUG();
8ff24541 3201
1da177e4 3202 /* dst address */
4df864c1 3203 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
1da177e4
LT		 3204 addr->sadb_address_len =
3205 (sizeof(struct sadb_address)+sockaddr_size)/
3206 sizeof(uint64_t);
3207 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3208 addr->sadb_address_proto = 0;
3209 addr->sadb_address_reserved = 0;
e5b56652
YH		 3210 addr->sadb_address_prefixlen =
3211 pfkey_sockaddr_fill(&x->id.daddr, 0,
3212 (struct sockaddr *) (addr + 1),
3213 x->props.family);
3214 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3215 BUG();
3216
4df864c1 3217 pol = skb_put(skb, sizeof(struct sadb_x_policy));
1da177e4
LT		 3218 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3219 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3220 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
65e0736b 3221 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
ff862a46 3222 pol->sadb_x_policy_reserved = 0;
1da177e4 3223 pol->sadb_x_policy_id = xp->index;
ff862a46 3224 pol->sadb_x_policy_priority = xp->priority;
1da177e4
LT		 3225
3226 /* Set sadb_comb's. */
3227 if (x->id.proto == IPPROTO_AH)
3228 dump_ah_combs(skb, t);
3229 else if (x->id.proto == IPPROTO_ESP)
3230 dump_esp_combs(skb, t);
3231
4e2ba18e
VY		 3232 /* security context */
3233 if (xfrm_ctx) {
4df864c1
JB		 3234 sec_ctx = skb_put(skb,
3235 sizeof(struct sadb_x_sec_ctx) + ctx_size);
4e2ba18e
VY		 3236 sec_ctx->sadb_x_sec_len =
3237 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3238 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3239 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3240 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3241 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3242 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3243 xfrm_ctx->ctx_len);
3244 }
3245
36f41f8f
ED		 3246 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3247 xs_net(x));
1da177e4
LT		 3248}
3249
cb969f07 3250static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3251 u8 *data, int len, int *dir)
1da177e4 3252{
07fb0f17 3253 struct net *net = sock_net(sk);
1da177e4
LT		 3254 struct xfrm_policy *xp;
3255 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3256 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3257
cb969f07 3258 switch (sk->sk_family) {
1da177e4
LT		 3259 case AF_INET:
3260 if (opt != IP_IPSEC_POLICY) {
3261 *dir = -EOPNOTSUPP;
3262 return NULL;
3263 }
3264 break;
dfd56b8b 3265#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 3266 case AF_INET6:
3267 if (opt != IPV6_IPSEC_POLICY) {
3268 *dir = -EOPNOTSUPP;
3269 return NULL;
3270 }
3271 break;
3272#endif
3273 default:
3274 *dir = -EINVAL;
3275 return NULL;
3276 }
3277
3278 *dir = -EINVAL;
3279
3280 if (len < sizeof(struct sadb_x_policy) ||
3281 pol->sadb_x_policy_len*8 > len ||
3282 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3283 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3284 return NULL;
3285
07fb0f17 3286 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3287 if (xp == NULL) {
3288 *dir = -ENOBUFS;
3289 return NULL;
3290 }
3291
3292 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3293 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3294
3295 xp->lft.soft_byte_limit = XFRM_INF;
3296 xp->lft.hard_byte_limit = XFRM_INF;
3297 xp->lft.soft_packet_limit = XFRM_INF;
3298 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3299 xp->family = sk->sk_family;
1da177e4
LT		 3300
3301 xp->xfrm_nr = 0;
3302 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3303 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3304 goto out;
3305
df71837d
TJ		 3306 /* security context too */
3307 if (len >= (pol->sadb_x_policy_len*8 +
3308 sizeof(struct sadb_x_sec_ctx))) {
3309 char *p = (char *)pol;
3310 struct xfrm_user_sec_ctx *uctx;
3311
3312 p += pol->sadb_x_policy_len*8;
3313 sec_ctx = (struct sadb_x_sec_ctx *)p;
3314 if (len < pol->sadb_x_policy_len*8 +
d90c9024 3315 sec_ctx->sadb_x_sec_len*8) {
cb969f07 3316 *dir = -EINVAL;
df71837d 3317 goto out;
cb969f07 3318 }
df71837d
TJ		 3319 if ((*dir = verify_sec_ctx_len(p)))
3320 goto out;
87536a81 3321 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
52a4c640 3322 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
df71837d
TJ		 3323 kfree(uctx);
3324
3325 if (*dir)
3326 goto out;
3327 }
3328
1da177e4
LT		 3329 *dir = pol->sadb_x_policy_dir-1;
3330 return xp;
3331
3332out:
70e90679 3333 xp->walk.dead = 1;
64c31b3f 3334 xfrm_policy_destroy(xp);
1da177e4
LT		 3335 return NULL;
3336}
3337
5d36b180 3338static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3339{
3340 struct sk_buff *skb;
3341 struct sadb_msg *hdr;
3342 struct sadb_sa *sa;
3343 struct sadb_address *addr;
3344 struct sadb_x_nat_t_port *n_port;
1da177e4
LT		 3345 int sockaddr_size;
3346 int size;
3347 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3348 struct xfrm_encap_tmpl *natt = NULL;
3349
3350 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3351 if (!sockaddr_size)
3352 return -EINVAL;
3353
3354 if (!satype)
3355 return -EINVAL;
3356
3357 if (!x->encap)
3358 return -EINVAL;
3359
3360 natt = x->encap;
3361
3362 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3363 *
3364 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3365 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3366 */
8ff24541 3367
1da177e4
LT		 3368 size = sizeof(struct sadb_msg) +
3369 sizeof(struct sadb_sa) +
3370 (sizeof(struct sadb_address) * 2) +
3371 (sockaddr_size * 2) +
3372 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3373
1da177e4
LT		 3374 skb = alloc_skb(size + 16, GFP_ATOMIC);
3375 if (skb == NULL)
3376 return -ENOMEM;
8ff24541 3377
4df864c1 3378 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 3379 hdr->sadb_msg_version = PF_KEY_V2;
3380 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3381 hdr->sadb_msg_satype = satype;
3382 hdr->sadb_msg_len = size / sizeof(uint64_t);
3383 hdr->sadb_msg_errno = 0;
3384 hdr->sadb_msg_reserved = 0;
3385 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3386 hdr->sadb_msg_pid = 0;
3387
3388 /* SA */
4df864c1 3389 sa = skb_put(skb, sizeof(struct sadb_sa));
1da177e4
LT		 3390 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3391 sa->sadb_sa_exttype = SADB_EXT_SA;
3392 sa->sadb_sa_spi = x->id.spi;
3393 sa->sadb_sa_replay = 0;
3394 sa->sadb_sa_state = 0;
3395 sa->sadb_sa_auth = 0;
3396 sa->sadb_sa_encrypt = 0;
3397 sa->sadb_sa_flags = 0;
3398
3399 /* ADDRESS_SRC (old addr) */
4df864c1 3400 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 3401 addr->sadb_address_len =
1da177e4
LT		 3402 (sizeof(struct sadb_address)+sockaddr_size)/
3403 sizeof(uint64_t);
3404 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3405 addr->sadb_address_proto = 0;
3406 addr->sadb_address_reserved = 0;
e5b56652
YH		 3407 addr->sadb_address_prefixlen =
3408 pfkey_sockaddr_fill(&x->props.saddr, 0,
3409 (struct sockaddr *) (addr + 1),
3410 x->props.family);
3411 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3412 BUG();
3413
3414 /* NAT_T_SPORT (old port) */
4df864c1 3415 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 3416 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3417 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3418 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3419 n_port->sadb_x_nat_t_port_reserved = 0;
3420
3421 /* ADDRESS_DST (new addr) */
4df864c1 3422 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 3423 addr->sadb_address_len =
1da177e4
LT		 3424 (sizeof(struct sadb_address)+sockaddr_size)/
3425 sizeof(uint64_t);
3426 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3427 addr->sadb_address_proto = 0;
3428 addr->sadb_address_reserved = 0;
e5b56652
YH		 3429 addr->sadb_address_prefixlen =
3430 pfkey_sockaddr_fill(ipaddr, 0,
3431 (struct sockaddr *) (addr + 1),
3432 x->props.family);
3433 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3434 BUG();
3435
3436 /* NAT_T_DPORT (new port) */
4df864c1 3437 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 3438 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3439 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3440 n_port->sadb_x_nat_t_port_port = sport;
3441 n_port->sadb_x_nat_t_port_reserved = 0;
3442
36f41f8f
ED		 3443 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3444 xs_net(x));
1da177e4
LT		 3445}
3446
08de61be
SS		 3447#ifdef CONFIG_NET_KEY_MIGRATE
3448static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
183cad12 3449 const struct xfrm_selector *sel)
08de61be
SS		 3450{
3451 struct sadb_address *addr;
4df864c1 3452 addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
08de61be
SS		 3453 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3454 addr->sadb_address_exttype = type;
3455 addr->sadb_address_proto = sel->proto;
3456 addr->sadb_address_reserved = 0;
3457
3458 switch (type) {
3459 case SADB_EXT_ADDRESS_SRC:
e5b56652
YH		 3460 addr->sadb_address_prefixlen = sel->prefixlen_s;
3461 pfkey_sockaddr_fill(&sel->saddr, 0,
3462 (struct sockaddr *)(addr + 1),
3463 sel->family);
08de61be
SS		 3464 break;
3465 case SADB_EXT_ADDRESS_DST:
e5b56652
YH		 3466 addr->sadb_address_prefixlen = sel->prefixlen_d;
3467 pfkey_sockaddr_fill(&sel->daddr, 0,
3468 (struct sockaddr *)(addr + 1),
3469 sel->family);
08de61be
SS		 3470 break;
3471 default:
3472 return -EINVAL;
3473 }
3474
3475 return 0;
3476}
3477
13c1d189 3478
183cad12 3479static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
13c1d189
AE		 3480{
3481 struct sadb_x_kmaddress *kma;
3482 u8 *sa;
3483 int family = k->family;
3484 int socklen = pfkey_sockaddr_len(family);
3485 int size_req;
3486
3487 size_req = (sizeof(struct sadb_x_kmaddress) +
3488 pfkey_sockaddr_pair_size(family));
3489
b080db58 3490 kma = skb_put_zero(skb, size_req);
13c1d189
AE		 3491 kma->sadb_x_kmaddress_len = size_req / 8;
3492 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3493 kma->sadb_x_kmaddress_reserved = k->reserved;
3494
3495 sa = (u8 *)(kma + 1);
3496 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3497 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3498 return -EINVAL;
3499
3500 return 0;
3501}
3502
08de61be
SS		 3503static int set_ipsecrequest(struct sk_buff *skb,
3504 uint8_t proto, uint8_t mode, int level,
3505 uint32_t reqid, uint8_t family,
183cad12 3506 const xfrm_address_t *src, const xfrm_address_t *dst)
08de61be
SS		 3507{
3508 struct sadb_x_ipsecrequest *rq;
e5b56652
YH		 3509 u8 *sa;
3510 int socklen = pfkey_sockaddr_len(family);
08de61be
SS		 3511 int size_req;
3512
3513 size_req = sizeof(struct sadb_x_ipsecrequest) +
3514 pfkey_sockaddr_pair_size(family);
3515
b080db58 3516 rq = skb_put_zero(skb, size_req);
08de61be
SS		 3517 rq->sadb_x_ipsecrequest_len = size_req;
3518 rq->sadb_x_ipsecrequest_proto = proto;
3519 rq->sadb_x_ipsecrequest_mode = mode;
3520 rq->sadb_x_ipsecrequest_level = level;
3521 rq->sadb_x_ipsecrequest_reqid = reqid;
3522
e5b56652
YH		 3523 sa = (u8 *) (rq + 1);
3524 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3525 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
08de61be 3526 return -EINVAL;
08de61be
SS		 3527
3528 return 0;
3529}
3530#endif
3531
3532#ifdef CONFIG_NET_KEY_MIGRATE
183cad12
DM		 3533static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3534 const struct xfrm_migrate *m, int num_bundles,
8bafd730
AA		 3535 const struct xfrm_kmaddress *k,
3536 const struct xfrm_encap_tmpl *encap)
08de61be
SS		 3537{
3538 int i;
3539 int sasize_sel;
3540 int size = 0;
3541 int size_pol = 0;
3542 struct sk_buff *skb;
3543 struct sadb_msg *hdr;
3544 struct sadb_x_policy *pol;
183cad12 3545 const struct xfrm_migrate *mp;
08de61be
SS		 3546
3547 if (type != XFRM_POLICY_TYPE_MAIN)
3548 return 0;
3549
3550 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3551 return -EINVAL;
3552
13c1d189
AE		 3553 if (k != NULL) {
3554 /* addresses for KM */
3555 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3556 pfkey_sockaddr_pair_size(k->family));
3557 }
3558
08de61be
SS		 3559 /* selector */
3560 sasize_sel = pfkey_sockaddr_size(sel->family);
3561 if (!sasize_sel)
3562 return -EINVAL;
3563 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3564
3565 /* policy info */
3566 size_pol += sizeof(struct sadb_x_policy);
3567
3568 /* ipsecrequests */
3569 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3570 /* old locator pair */
3571 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3572 pfkey_sockaddr_pair_size(mp->old_family);
3573 /* new locator pair */
3574 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3575 pfkey_sockaddr_pair_size(mp->new_family);
3576 }
3577
3578 size += sizeof(struct sadb_msg) + size_pol;
3579
3580 /* alloc buffer */
3581 skb = alloc_skb(size, GFP_ATOMIC);
3582 if (skb == NULL)
3583 return -ENOMEM;
3584
4df864c1 3585 hdr = skb_put(skb, sizeof(struct sadb_msg));
08de61be
SS		 3586 hdr->sadb_msg_version = PF_KEY_V2;
3587 hdr->sadb_msg_type = SADB_X_MIGRATE;
3588 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3589 hdr->sadb_msg_len = size / 8;
3590 hdr->sadb_msg_errno = 0;
3591 hdr->sadb_msg_reserved = 0;
3592 hdr->sadb_msg_seq = 0;
3593 hdr->sadb_msg_pid = 0;
3594
13c1d189
AE		 3595 /* Addresses to be used by KM for negotiation, if ext is available */
3596 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
89eb06f1 3597 goto err;
13c1d189 3598
08de61be
SS		 3599 /* selector src */
3600 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3601
3602 /* selector dst */
3603 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3604
3605 /* policy information */
4df864c1 3606 pol = skb_put(skb, sizeof(struct sadb_x_policy));
08de61be
SS		 3607 pol->sadb_x_policy_len = size_pol / 8;
3608 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3609 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3610 pol->sadb_x_policy_dir = dir + 1;
ff862a46 3611 pol->sadb_x_policy_reserved = 0;
08de61be
SS		 3612 pol->sadb_x_policy_id = 0;
3613 pol->sadb_x_policy_priority = 0;
3614
3615 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3616 /* old ipsecrequest */
55569ce2
KM		 3617 int mode = pfkey_mode_from_xfrm(mp->mode);
3618 if (mode < 0)
d4782c32 3619 goto err;
55569ce2 3620 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3621 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3622 mp->reqid, mp->old_family,
d4782c32
PM		 3623 &mp->old_saddr, &mp->old_daddr) < 0)
3624 goto err;
08de61be
SS		 3625
3626 /* new ipsecrequest */
55569ce2 3627 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3628 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3629 mp->reqid, mp->new_family,
d4782c32
PM		 3630 &mp->new_saddr, &mp->new_daddr) < 0)
3631 goto err;
08de61be
SS		 3632 }
3633
3634 /* broadcast migrate message to sockets */
36f41f8f 3635 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
08de61be
SS		 3636
3637 return 0;
d4782c32
PM		 3638
3639err:
3640 kfree_skb(skb);
3641 return -EINVAL;
08de61be
SS		 3642}
3643#else
183cad12
DM		 3644static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3645 const struct xfrm_migrate *m, int num_bundles,
8bafd730
AA		 3646 const struct xfrm_kmaddress *k,
3647 const struct xfrm_encap_tmpl *encap)
08de61be
SS		 3648{
3649 return -ENOPROTOOPT;
3650}
3651#endif
3652
1b784140 3653static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4
LT		 3654{
3655 struct sock *sk = sock->sk;
3656 struct sk_buff *skb = NULL;
3657 struct sadb_msg *hdr = NULL;
3658 int err;
283bc9f3 3659 struct net *net = sock_net(sk);
1da177e4
LT		 3660
3661 err = -EOPNOTSUPP;
3662 if (msg->msg_flags & MSG_OOB)
3663 goto out;
3664
3665 err = -EMSGSIZE;
95c96174 3666 if ((unsigned int)len > sk->sk_sndbuf - 32)
1da177e4
LT		 3667 goto out;
3668
3669 err = -ENOBUFS;
3670 skb = alloc_skb(len, GFP_KERNEL);
3671 if (skb == NULL)
3672 goto out;
3673
3674 err = -EFAULT;
6ce8e9ce 3675 if (memcpy_from_msg(skb_put(skb,len), msg, len))
1da177e4
LT		 3676 goto out;
3677
3678 hdr = pfkey_get_base_msg(skb, &err);
3679 if (!hdr)
3680 goto out;
3681
283bc9f3 3682 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
1da177e4 3683 err = pfkey_process(sk, skb, hdr);
283bc9f3 3684 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 3685
3686out:
3687 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3688 err = 0;
6f961068 3689 kfree_skb(skb);
1da177e4
LT		 3690
3691 return err ? : len;
3692}
3693
1b784140 3694static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
1da177e4
LT		 3695 int flags)
3696{
3697 struct sock *sk = sock->sk;
83321d6b 3698 struct pfkey_sock *pfk = pfkey_sk(sk);
1da177e4
LT		 3699 struct sk_buff *skb;
3700 int copied, err;
3701
3702 err = -EINVAL;
3703 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3704 goto out;
3705
1da177e4
LT		 3706 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3707 if (skb == NULL)
3708 goto out;
3709
3710 copied = skb->len;
3711 if (copied > len) {
3712 msg->msg_flags |= MSG_TRUNC;
3713 copied = len;
3714 }
3715
badff6d0 3716 skb_reset_transport_header(skb);
51f3d02b 3717 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4
LT		 3718 if (err)
3719 goto out_free;
3720
3b885787 3721 sock_recv_ts_and_drops(msg, sk, skb);
1da177e4
LT		 3722
3723 err = (flags & MSG_TRUNC) ? skb->len : copied;
3724
83321d6b
TT		 3725 if (pfk->dump.dump != NULL &&
3726 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3727 pfkey_do_dump(pfk);
3728
1da177e4
LT		 3729out_free:
3730 skb_free_datagram(sk, skb);
3731out:
3732 return err;
3733}
3734
90ddc4f0 3735static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3736 .family = PF_KEY,
3737 .owner = THIS_MODULE,
3738 /* Operations that make no sense on pfkey sockets. */
3739 .bind = sock_no_bind,
3740 .connect = sock_no_connect,
3741 .socketpair = sock_no_socketpair,
3742 .accept = sock_no_accept,
3743 .getname = sock_no_getname,
3744 .ioctl = sock_no_ioctl,
3745 .listen = sock_no_listen,
3746 .shutdown = sock_no_shutdown,
3747 .setsockopt = sock_no_setsockopt,
3748 .getsockopt = sock_no_getsockopt,
3749 .mmap = sock_no_mmap,
3750 .sendpage = sock_no_sendpage,
3751
3752 /* Now the operations that really occur. */
3753 .release = pfkey_release,
a11e1d43 3754 .poll = datagram_poll,
1da177e4
LT		 3755 .sendmsg = pfkey_sendmsg,
3756 .recvmsg = pfkey_recvmsg,
3757};
3758
ec1b4cf7 3759static const struct net_proto_family pfkey_family_ops = {
1da177e4
LT		 3760 .family = PF_KEY,
3761 .create = pfkey_create,
3762 .owner = THIS_MODULE,
3763};
3764
3765#ifdef CONFIG_PROC_FS
bd2f7476 3766static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3767{
27b5b865 3768 struct sock *s = sk_entry(v);
1da177e4 3769
bd2f7476
PE		 3770 if (v == SEQ_START_TOKEN)
3771 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3772 else
71338aa7 3773 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4 3774 s,
41c6d650 3775 refcount_read(&s->sk_refcnt),
31e6d363
ED		 3776 sk_rmem_alloc_get(s),
3777 sk_wmem_alloc_get(s),
a7cb5a49 3778 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
1da177e4
LT		 3779 sock_i_ino(s)
3780 );
bd2f7476
PE		 3781 return 0;
3782}
3783
3784static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
ada440e3 3785 __acquires(rcu)
bd2f7476 3786{
7013ec30 3787 struct net *net = seq_file_net(f);
3fa87a32 3788 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 3789
7f6b9dbd 3790 rcu_read_lock();
3791 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
bd2f7476
PE		 3792}
3793
3794static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3795{
7013ec30 3796 struct net *net = seq_file_net(f);
3fa87a32
AD		 3797 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3798
7f6b9dbd 3799 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
bd2f7476 3800}
1da177e4 3801
bd2f7476 3802static void pfkey_seq_stop(struct seq_file *f, void *v)
ada440e3 3803 __releases(rcu)
bd2f7476 3804{
7f6b9dbd 3805 rcu_read_unlock();
bd2f7476 3806}
1da177e4 3807
98147d52 3808static const struct seq_operations pfkey_seq_ops = {
bd2f7476
PE		 3809 .start = pfkey_seq_start,
3810 .next = pfkey_seq_next,
3811 .stop = pfkey_seq_stop,
3812 .show = pfkey_seq_show,
3813};
1da177e4 3814
7013ec30 3815static int __net_init pfkey_init_proc(struct net *net)
61145aa1 3816{
bd2f7476
PE		 3817 struct proc_dir_entry *e;
3818
c3506372
CH		 3819 e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops,
3820 sizeof(struct seq_net_private));
bd2f7476 3821 if (e == NULL)
61145aa1 3822 return -ENOMEM;
bd2f7476 3823
bd2f7476 3824 return 0;
61145aa1
PE		 3825}
3826
2c8c1e72 3827static void __net_exit pfkey_exit_proc(struct net *net)
61145aa1 3828{
ece31ffd 3829 remove_proc_entry("pfkey", net->proc_net);
61145aa1
PE		 3830}
3831#else
2c8c1e72 3832static inline int pfkey_init_proc(struct net *net)
61145aa1
PE		 3833{
3834 return 0;
3835}
3836
2c8c1e72 3837static inline void pfkey_exit_proc(struct net *net)
61145aa1
PE		 3838{
3839}
1da177e4
LT		 3840#endif
3841
3842static struct xfrm_mgr pfkeyv2_mgr =
3843{
1da177e4
LT		 3844 .notify = pfkey_send_notify,
3845 .acquire = pfkey_send_acquire,
3846 .compile_policy = pfkey_compile_policy,
3847 .new_mapping = pfkey_send_new_mapping,
26b15dad 3848 .notify_policy = pfkey_send_policy_notify,
08de61be 3849 .migrate = pfkey_send_migrate,
0f24558e 3850 .is_alive = pfkey_is_alive,
1da177e4
LT		 3851};
3852
3fa87a32
AD		 3853static int __net_init pfkey_net_init(struct net *net)
3854{
23c049ca 3855 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3fa87a32
AD		 3856 int rv;
3857
3fa87a32
AD		 3858 INIT_HLIST_HEAD(&net_pfkey->table);
3859 atomic_set(&net_pfkey->socks_nr, 0);
23c049ca 3860
7013ec30 3861 rv = pfkey_init_proc(net);
3fa87a32 3862
3fa87a32
AD		 3863 return rv;
3864}
3865
3866static void __net_exit pfkey_net_exit(struct net *net)
3867{
3868 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3869
7013ec30 3870 pfkey_exit_proc(net);
663faeab 3871 WARN_ON(!hlist_empty(&net_pfkey->table));
3fa87a32
AD		 3872}
3873
3874static struct pernet_operations pfkey_net_ops = {
3875 .init = pfkey_net_init,
3876 .exit = pfkey_net_exit,
23c049ca
EB		 3877 .id = &pfkey_net_id,
3878 .size = sizeof(struct netns_pfkey),
3fa87a32
AD		 3879};
3880
1da177e4
LT		 3881static void __exit ipsec_pfkey_exit(void)
3882{
3883 xfrm_unregister_km(&pfkeyv2_mgr);
1da177e4 3884 sock_unregister(PF_KEY);
180211b8 3885 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3886 proto_unregister(&key_proto);
3887}
3888
3889static int __init ipsec_pfkey_init(void)
3890{
3891 int err = proto_register(&key_proto, 0);
3892
3893 if (err != 0)
3894 goto out;
3895
180211b8 3896 err = register_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3897 if (err != 0)
3898 goto out_unregister_key_proto;
180211b8
AD		 3899 err = sock_register(&pfkey_family_ops);
3900 if (err != 0)
3901 goto out_unregister_pernet;
1da177e4
LT		 3902 err = xfrm_register_km(&pfkeyv2_mgr);
3903 if (err != 0)
7013ec30 3904 goto out_sock_unregister;
1da177e4
LT		 3905out:
3906 return err;
180211b8 3907
1da177e4 3908out_sock_unregister:
1da177e4 3909 sock_unregister(PF_KEY);
180211b8
AD		 3910out_unregister_pernet:
3911 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3912out_unregister_key_proto:
3913 proto_unregister(&key_proto);
3914 goto out;
3915}
3916
3917module_init(ipsec_pfkey_init);
3918module_exit(ipsec_pfkey_exit);
3919MODULE_LICENSE("GPL");
3920MODULE_ALIAS_NETPROTO(PF_KEY);
Linux 6.x block layer and io_uring tree(s)