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Linux 6.14-rc3
[linux.git] / net / key / af_key.c
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2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
4 *
1da177e4
LT		 5 * Authors: Maxim Giryaev <[email protected]>
6 * David S. Miller <[email protected]>
7 * Alexey Kuznetsov <[email protected]>
8 * Kunihiro Ishiguro <[email protected]>
9 * Kazunori MIYAZAWA / USAGI Project <[email protected]>
10 * Derek Atkins <[email protected]>
11 */
12
4fc268d2 13#include <linux/capability.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/socket.h>
17#include <linux/pfkeyv2.h>
18#include <linux/ipsec.h>
19#include <linux/skbuff.h>
20#include <linux/rtnetlink.h>
21#include <linux/in.h>
22#include <linux/in6.h>
23#include <linux/proc_fs.h>
24#include <linux/init.h>
5a0e3ad6 25#include <linux/slab.h>
457c4cbc 26#include <net/net_namespace.h>
3fa87a32 27#include <net/netns/generic.h>
1da177e4
LT		 28#include <net/xfrm.h>
29
30#include <net/sock.h>
31
32#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
33#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
34
c7d03a00 35static unsigned int pfkey_net_id __read_mostly;
3fa87a32
AD		 36struct netns_pfkey {
37 /* List of all pfkey sockets. */
38 struct hlist_head table;
39 atomic_t socks_nr;
40};
7f6b9dbd 41static DEFINE_MUTEX(pfkey_mutex);
1da177e4 42
bd55775c 43#define DUMMY_MARK 0
e473fcb4 44static const struct xfrm_mark dummy_mark = {0, 0};
1da177e4
LT		 45struct pfkey_sock {
46 /* struct sock must be the first member of struct pfkey_sock */
47 struct sock sk;
48 int registered;
49 int promisc;
83321d6b
TT		 50
51 struct {
52 uint8_t msg_version;
15e47304 53 uint32_t msg_portid;
83321d6b
TT		 54 int (*dump)(struct pfkey_sock *sk);
55 void (*done)(struct pfkey_sock *sk);
56 union {
57 struct xfrm_policy_walk policy;
58 struct xfrm_state_walk state;
59 } u;
12a169e7 60 struct sk_buff *skb;
83321d6b 61 } dump;
89e357d8 62 struct mutex dump_lock;
1da177e4
LT		 63};
64
096f41d3
HX		 65static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
66 xfrm_address_t *saddr, xfrm_address_t *daddr,
67 u16 *family);
68
1da177e4
LT		 69static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
70{
71 return (struct pfkey_sock *)sk;
72}
73
4c93fbb0 74static int pfkey_can_dump(const struct sock *sk)
83321d6b
TT		 75{
76 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
77 return 1;
78 return 0;
79}
80
05238204 81static void pfkey_terminate_dump(struct pfkey_sock *pfk)
83321d6b 82{
05238204 83 if (pfk->dump.dump) {
12a169e7
HX		 84 if (pfk->dump.skb) {
85 kfree_skb(pfk->dump.skb);
86 pfk->dump.skb = NULL;
87 }
05238204
TT		 88 pfk->dump.done(pfk);
89 pfk->dump.dump = NULL;
90 pfk->dump.done = NULL;
91 }
83321d6b
TT		 92}
93
1da177e4
LT		 94static void pfkey_sock_destruct(struct sock *sk)
95{
3fa87a32
AD		 96 struct net *net = sock_net(sk);
97 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
98
05238204 99 pfkey_terminate_dump(pfkey_sk(sk));
1da177e4
LT		 100 skb_queue_purge(&sk->sk_receive_queue);
101
102 if (!sock_flag(sk, SOCK_DEAD)) {
207024b9 103 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
1da177e4
LT		 104 return;
105 }
106
547b792c 107 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
14afee4b 108 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
1da177e4 109
3fa87a32 110 atomic_dec(&net_pfkey->socks_nr);
1da177e4
LT		 111}
112
90ddc4f0 113static const struct proto_ops pfkey_ops;
1da177e4
LT		 114
115static void pfkey_insert(struct sock *sk)
116{
3fa87a32
AD		 117 struct net *net = sock_net(sk);
118 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
119
7f6b9dbd 120 mutex_lock(&pfkey_mutex);
121 sk_add_node_rcu(sk, &net_pfkey->table);
122 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 123}
124
125static void pfkey_remove(struct sock *sk)
126{
7f6b9dbd 127 mutex_lock(&pfkey_mutex);
128 sk_del_node_init_rcu(sk);
129 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 130}
131
132static struct proto key_proto = {
133 .name = "KEY",
134 .owner = THIS_MODULE,
135 .obj_size = sizeof(struct pfkey_sock),
136};
137
3f378b68
EP		 138static int pfkey_create(struct net *net, struct socket *sock, int protocol,
139 int kern)
1da177e4 140{
3fa87a32 141 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 142 struct sock *sk;
89e357d8 143 struct pfkey_sock *pfk;
1da177e4 144
df008c91 145 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 146 return -EPERM;
147 if (sock->type != SOCK_RAW)
148 return -ESOCKTNOSUPPORT;
149 if (protocol != PF_KEY_V2)
150 return -EPROTONOSUPPORT;
151
11aa9c28 152 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
1da177e4 153 if (sk == NULL)
a925316a 154 return -ENOMEM;
8ff24541 155
89e357d8
YS		 156 pfk = pfkey_sk(sk);
157 mutex_init(&pfk->dump_lock);
158
1da177e4
LT		 159 sock->ops = &pfkey_ops;
160 sock_init_data(sock, sk);
161
162 sk->sk_family = PF_KEY;
163 sk->sk_destruct = pfkey_sock_destruct;
164
3fa87a32 165 atomic_inc(&net_pfkey->socks_nr);
1da177e4
LT		 166
167 pfkey_insert(sk);
168
169 return 0;
1da177e4
LT		 170}
171
172static int pfkey_release(struct socket *sock)
173{
174 struct sock *sk = sock->sk;
175
176 if (!sk)
177 return 0;
178
179 pfkey_remove(sk);
180
181 sock_orphan(sk);
182 sock->sk = NULL;
183 skb_queue_purge(&sk->sk_write_queue);
7f6b9dbd 184
185 synchronize_rcu();
1da177e4
LT		 186 sock_put(sk);
187
188 return 0;
189}
190
fc2d5cfd
ST		 191static int pfkey_broadcast_one(struct sk_buff *skb, gfp_t allocation,
192 struct sock *sk)
1da177e4
LT		 193{
194 int err = -ENOBUFS;
195
fc2d5cfd
ST		 196 if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)
197 return err;
198
199 skb = skb_clone(skb, allocation);
200
201 if (skb) {
202 skb_set_owner_r(skb, sk);
203 skb_queue_tail(&sk->sk_receive_queue, skb);
204 sk->sk_data_ready(sk);
205 err = 0;
1da177e4 206 }
1da177e4
LT		 207 return err;
208}
209
210/* Send SKB to all pfkey sockets matching selected criteria. */
211#define BROADCAST_ALL 0
212#define BROADCAST_ONE 1
213#define BROADCAST_REGISTERED 2
214#define BROADCAST_PROMISC_ONLY 4
36f41f8f 215static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
07fb0f17
AD		 216 int broadcast_flags, struct sock *one_sk,
217 struct net *net)
1da177e4 218{
3fa87a32 219 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 220 struct sock *sk;
1da177e4
LT		 221 int err = -ESRCH;
222
223 /* XXX Do we need something like netlink_overrun? I think
224 * XXX PF_KEY socket apps will not mind current behavior.
225 */
226 if (!skb)
227 return -ENOMEM;
228
7f6b9dbd 229 rcu_read_lock();
b67bfe0d 230 sk_for_each_rcu(sk, &net_pfkey->table) {
1da177e4
LT		 231 struct pfkey_sock *pfk = pfkey_sk(sk);
232 int err2;
233
234 /* Yes, it means that if you are meant to receive this
235 * pfkey message you receive it twice as promiscuous
236 * socket.
237 */
238 if (pfk->promisc)
fc2d5cfd 239 pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
1da177e4
LT		 240
241 /* the exact target will be processed later */
242 if (sk == one_sk)
243 continue;
244 if (broadcast_flags != BROADCAST_ALL) {
245 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
246 continue;
247 if ((broadcast_flags & BROADCAST_REGISTERED) &&
248 !pfk->registered)
249 continue;
250 if (broadcast_flags & BROADCAST_ONE)
251 continue;
252 }
253
fc2d5cfd 254 err2 = pfkey_broadcast_one(skb, GFP_ATOMIC, sk);
1da177e4 255
f6b8dec9 256 /* Error is cleared after successful sending to at least one
1da177e4
LT		 257 * registered KM */
258 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
259 err = err2;
260 }
7f6b9dbd 261 rcu_read_unlock();
1da177e4
LT		 262
263 if (one_sk != NULL)
fc2d5cfd 264 err = pfkey_broadcast_one(skb, allocation, one_sk);
1da177e4 265
1da177e4
LT		 266 kfree_skb(skb);
267 return err;
268}
269
05238204
TT		 270static int pfkey_do_dump(struct pfkey_sock *pfk)
271{
12a169e7 272 struct sadb_msg *hdr;
05238204
TT		 273 int rc;
274
89e357d8
YS		 275 mutex_lock(&pfk->dump_lock);
276 if (!pfk->dump.dump) {
277 rc = 0;
278 goto out;
279 }
280
05238204 281 rc = pfk->dump.dump(pfk);
89e357d8
YS		 282 if (rc == -ENOBUFS) {
283 rc = 0;
284 goto out;
285 }
05238204 286
12a169e7 287 if (pfk->dump.skb) {
89e357d8
YS		 288 if (!pfkey_can_dump(&pfk->sk)) {
289 rc = 0;
290 goto out;
291 }
12a169e7
HX		 292
293 hdr = (struct sadb_msg *) pfk->dump.skb->data;
294 hdr->sadb_msg_seq = 0;
295 hdr->sadb_msg_errno = rc;
36f41f8f 296 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 297 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 298 pfk->dump.skb = NULL;
299 }
300
05238204 301 pfkey_terminate_dump(pfk);
89e357d8
YS		 302
303out:
304 mutex_unlock(&pfk->dump_lock);
05238204
TT		 305 return rc;
306}
307
4c93fbb0
DM		 308static inline void pfkey_hdr_dup(struct sadb_msg *new,
309 const struct sadb_msg *orig)
1da177e4
LT		 310{
311 *new = *orig;
312}
313
4c93fbb0 314static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
1da177e4
LT		 315{
316 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
317 struct sadb_msg *hdr;
318
319 if (!skb)
320 return -ENOBUFS;
321
322 /* Woe be to the platform trying to support PFKEY yet
323 * having normal errnos outside the 1-255 range, inclusive.
324 */
325 err = -err;
326 if (err == ERESTARTSYS ||
327 err == ERESTARTNOHAND ||
328 err == ERESTARTNOINTR)
329 err = EINTR;
330 if (err >= 512)
331 err = EINVAL;
09a62660 332 BUG_ON(err <= 0 || err >= 256);
1da177e4 333
4df864c1 334 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 335 pfkey_hdr_dup(hdr, orig);
336 hdr->sadb_msg_errno = (uint8_t) err;
337 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
338 sizeof(uint64_t));
339
36f41f8f 340 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 341
342 return 0;
343}
344
8603b955 345static const u8 sadb_ext_min_len[] = {
1da177e4
LT		 346 [SADB_EXT_RESERVED] = (u8) 0,
347 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
348 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
349 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
350 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
351 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
352 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
353 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
354 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
355 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
356 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
357 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
358 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
359 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
360 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
361 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
362 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
363 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
364 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
365 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
366 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
367 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
368 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
369 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
df71837d 370 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
13c1d189 371 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
d2c5f658 372 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
1da177e4
LT		 373};
374
375/* Verify sadb_address_{len,prefixlen} against sa_family. */
4c93fbb0 376static int verify_address_len(const void *p)
1da177e4 377{
4c93fbb0
DM		 378 const struct sadb_address *sp = p;
379 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
380 const struct sockaddr_in *sin;
dfd56b8b 381#if IS_ENABLED(CONFIG_IPV6)
4c93fbb0 382 const struct sockaddr_in6 *sin6;
1da177e4
LT		 383#endif
384 int len;
385
06b335cb
EB		 386 if (sp->sadb_address_len <
387 DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family),
388 sizeof(uint64_t)))
389 return -EINVAL;
390
1da177e4
LT		 391 switch (addr->sa_family) {
392 case AF_INET:
356f89e1 393 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
1da177e4
LT		 394 if (sp->sadb_address_len != len ||
395 sp->sadb_address_prefixlen > 32)
396 return -EINVAL;
397 break;
dfd56b8b 398#if IS_ENABLED(CONFIG_IPV6)
1da177e4 399 case AF_INET6:
356f89e1 400 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
1da177e4
LT		 401 if (sp->sadb_address_len != len ||
402 sp->sadb_address_prefixlen > 128)
403 return -EINVAL;
404 break;
405#endif
406 default:
407 /* It is user using kernel to keep track of security
408 * associations for another protocol, such as
409 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
410 * lengths.
411 *
412 * XXX Actually, association/policy database is not yet
413 * XXX able to cope with arbitrary sockaddr families.
414 * XXX When it can, remove this -EINVAL. -DaveM
415 */
416 return -EINVAL;
3ff50b79 417 }
1da177e4
LT		 418
419 return 0;
420}
421
4b66af2d
KE		 422static inline int sadb_key_len(const struct sadb_key *key)
423{
424 int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8);
425
426 return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes,
427 sizeof(uint64_t));
428}
429
430static int verify_key_len(const void *p)
431{
432 const struct sadb_key *key = p;
433
434 if (sadb_key_len(key) > key->sadb_key_len)
435 return -EINVAL;
436
437 return 0;
438}
439
4c93fbb0 440static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
df71837d 441{
356f89e1
IJ		 442 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
443 sec_ctx->sadb_x_ctx_len,
444 sizeof(uint64_t));
df71837d
TJ		 445}
446
4c93fbb0 447static inline int verify_sec_ctx_len(const void *p)
df71837d 448{
4c93fbb0 449 const struct sadb_x_sec_ctx *sec_ctx = p;
298bb621 450 int len = sec_ctx->sadb_x_ctx_len;
df71837d 451
298bb621 452 if (len > PAGE_SIZE)
df71837d
TJ		 453 return -EINVAL;
454
455 len = pfkey_sec_ctx_len(sec_ctx);
456
457 if (sec_ctx->sadb_x_sec_len != len)
458 return -EINVAL;
459
460 return 0;
461}
462
87536a81
NA		 463static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
464 gfp_t gfp)
df71837d
TJ		 465{
466 struct xfrm_user_sec_ctx *uctx = NULL;
467 int ctx_size = sec_ctx->sadb_x_ctx_len;
468
87536a81 469 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
df71837d
TJ		 470
471 if (!uctx)
472 return NULL;
473
474 uctx->len = pfkey_sec_ctx_len(sec_ctx);
475 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
476 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
477 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
478 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
479 memcpy(uctx + 1, sec_ctx + 1,
480 uctx->ctx_len);
481
482 return uctx;
483}
484
4c93fbb0
DM		 485static int present_and_same_family(const struct sadb_address *src,
486 const struct sadb_address *dst)
1da177e4 487{
4c93fbb0 488 const struct sockaddr *s_addr, *d_addr;
1da177e4
LT		 489
490 if (!src || !dst)
491 return 0;
492
4c93fbb0
DM		 493 s_addr = (const struct sockaddr *)(src + 1);
494 d_addr = (const struct sockaddr *)(dst + 1);
1da177e4
LT		 495 if (s_addr->sa_family != d_addr->sa_family)
496 return 0;
497 if (s_addr->sa_family != AF_INET
dfd56b8b 498#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 499 && s_addr->sa_family != AF_INET6
500#endif
501 )
502 return 0;
503
504 return 1;
505}
506
4c93fbb0 507static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
1da177e4 508{
4c93fbb0 509 const char *p = (char *) hdr;
1da177e4
LT		 510 int len = skb->len;
511
512 len -= sizeof(*hdr);
513 p += sizeof(*hdr);
514 while (len > 0) {
4c93fbb0 515 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
1da177e4
LT		 516 uint16_t ext_type;
517 int ext_len;
518
4e765b49
EB		 519 if (len < sizeof(*ehdr))
520 return -EINVAL;
521
1da177e4
LT		 522 ext_len = ehdr->sadb_ext_len;
523 ext_len *= sizeof(uint64_t);
524 ext_type = ehdr->sadb_ext_type;
525 if (ext_len < sizeof(uint64_t) ||
526 ext_len > len ||
527 ext_type == SADB_EXT_RESERVED)
528 return -EINVAL;
529
530 if (ext_type <= SADB_EXT_MAX) {
531 int min = (int) sadb_ext_min_len[ext_type];
532 if (ext_len < min)
533 return -EINVAL;
534 if (ext_hdrs[ext_type-1] != NULL)
535 return -EINVAL;
4b66af2d
KE		 536 switch (ext_type) {
537 case SADB_EXT_ADDRESS_SRC:
538 case SADB_EXT_ADDRESS_DST:
539 case SADB_EXT_ADDRESS_PROXY:
540 case SADB_X_EXT_NAT_T_OA:
1da177e4
LT		 541 if (verify_address_len(p))
542 return -EINVAL;
4b66af2d
KE		 543 break;
544 case SADB_X_EXT_SEC_CTX:
df71837d
TJ		 545 if (verify_sec_ctx_len(p))
546 return -EINVAL;
4b66af2d
KE		 547 break;
548 case SADB_EXT_KEY_AUTH:
549 case SADB_EXT_KEY_ENCRYPT:
550 if (verify_key_len(p))
551 return -EINVAL;
552 break;
553 default:
554 break;
df71837d 555 }
4c93fbb0 556 ext_hdrs[ext_type-1] = (void *) p;
1da177e4
LT		 557 }
558 p += ext_len;
559 len -= ext_len;
560 }
561
562 return 0;
563}
564
565static uint16_t
566pfkey_satype2proto(uint8_t satype)
567{
568 switch (satype) {
569 case SADB_SATYPE_UNSPEC:
570 return IPSEC_PROTO_ANY;
571 case SADB_SATYPE_AH:
572 return IPPROTO_AH;
573 case SADB_SATYPE_ESP:
574 return IPPROTO_ESP;
575 case SADB_X_SATYPE_IPCOMP:
576 return IPPROTO_COMP;
1da177e4
LT		 577 default:
578 return 0;
579 }
580 /* NOTREACHED */
581}
582
583static uint8_t
584pfkey_proto2satype(uint16_t proto)
585{
586 switch (proto) {
587 case IPPROTO_AH:
588 return SADB_SATYPE_AH;
589 case IPPROTO_ESP:
590 return SADB_SATYPE_ESP;
591 case IPPROTO_COMP:
592 return SADB_X_SATYPE_IPCOMP;
1da177e4
LT		 593 default:
594 return 0;
595 }
596 /* NOTREACHED */
597}
598
599/* BTW, this scheme means that there is no way with PFKEY2 sockets to
600 * say specifically 'just raw sockets' as we encode them as 255.
601 */
602
603static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
604{
a02cec21 605 return proto == IPSEC_PROTO_ANY ? 0 : proto;
1da177e4
LT		 606}
607
608static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
609{
a02cec21 610 return proto ? proto : IPSEC_PROTO_ANY;
1da177e4
LT		 611}
612
9e8b4ed8
YH		 613static inline int pfkey_sockaddr_len(sa_family_t family)
614{
615 switch (family) {
616 case AF_INET:
617 return sizeof(struct sockaddr_in);
dfd56b8b 618#if IS_ENABLED(CONFIG_IPV6)
9e8b4ed8
YH		 619 case AF_INET6:
620 return sizeof(struct sockaddr_in6);
621#endif
622 }
623 return 0;
624}
625
5f95ac91
YH		 626static
627int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
1da177e4 628{
5f95ac91 629 switch (sa->sa_family) {
1da177e4 630 case AF_INET:
8ff24541 631 xaddr->a4 =
5f95ac91 632 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
1da177e4 633 return AF_INET;
dfd56b8b 634#if IS_ENABLED(CONFIG_IPV6)
1da177e4 635 case AF_INET6:
8ff24541 636 memcpy(xaddr->a6,
5f95ac91 637 &((struct sockaddr_in6 *)sa)->sin6_addr,
1da177e4
LT		 638 sizeof(struct in6_addr));
639 return AF_INET6;
640#endif
1da177e4 641 }
5f95ac91
YH		 642 return 0;
643}
644
645static
4c93fbb0 646int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
5f95ac91
YH		 647{
648 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
649 xaddr);
1da177e4
LT		 650}
651
4c93fbb0 652static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 653{
4c93fbb0
DM		 654 const struct sadb_sa *sa;
655 const struct sadb_address *addr;
1da177e4
LT		 656 uint16_t proto;
657 unsigned short family;
658 xfrm_address_t *xaddr;
659
ea110733 660 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 661 if (sa == NULL)
662 return NULL;
663
664 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
665 if (proto == 0)
666 return NULL;
667
668 /* sadb_address_len should be checked by caller */
ea110733 669 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
1da177e4
LT		 670 if (addr == NULL)
671 return NULL;
672
4c93fbb0 673 family = ((const struct sockaddr *)(addr + 1))->sa_family;
1da177e4
LT		 674 switch (family) {
675 case AF_INET:
4c93fbb0 676 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
1da177e4 677 break;
dfd56b8b 678#if IS_ENABLED(CONFIG_IPV6)
1da177e4 679 case AF_INET6:
4c93fbb0 680 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
1da177e4
LT		 681 break;
682#endif
683 default:
684 xaddr = NULL;
685 }
686
687 if (!xaddr)
688 return NULL;
689
bd55775c 690 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
1da177e4
LT		 691}
692
693#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
9e8b4ed8 694
1da177e4
LT		 695static int
696pfkey_sockaddr_size(sa_family_t family)
697{
9e8b4ed8 698 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
1da177e4
LT		 699}
700
55569ce2
KM		 701static inline int pfkey_mode_from_xfrm(int mode)
702{
703 switch(mode) {
704 case XFRM_MODE_TRANSPORT:
705 return IPSEC_MODE_TRANSPORT;
706 case XFRM_MODE_TUNNEL:
707 return IPSEC_MODE_TUNNEL;
708 case XFRM_MODE_BEET:
709 return IPSEC_MODE_BEET;
710 default:
711 return -1;
712 }
713}
714
715static inline int pfkey_mode_to_xfrm(int mode)
716{
717 switch(mode) {
718 case IPSEC_MODE_ANY: /*XXX*/
719 case IPSEC_MODE_TRANSPORT:
720 return XFRM_MODE_TRANSPORT;
721 case IPSEC_MODE_TUNNEL:
722 return XFRM_MODE_TUNNEL;
723 case IPSEC_MODE_BEET:
724 return XFRM_MODE_BEET;
725 default:
726 return -1;
727 }
728}
729
183cad12 730static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
4c93fbb0
DM		 731 struct sockaddr *sa,
732 unsigned short family)
e5b56652
YH		 733{
734 switch (family) {
735 case AF_INET:
736 {
737 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
738 sin->sin_family = AF_INET;
739 sin->sin_port = port;
740 sin->sin_addr.s_addr = xaddr->a4;
741 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
742 return 32;
743 }
dfd56b8b 744#if IS_ENABLED(CONFIG_IPV6)
e5b56652
YH		 745 case AF_INET6:
746 {
747 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
748 sin6->sin6_family = AF_INET6;
749 sin6->sin6_port = port;
750 sin6->sin6_flowinfo = 0;
15e318bd 751 sin6->sin6_addr = xaddr->in6;
e5b56652
YH		 752 sin6->sin6_scope_id = 0;
753 return 128;
754 }
755#endif
756 }
757 return 0;
758}
759
4c93fbb0 760static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
050f009e 761 int add_keys, int hsc)
1da177e4
LT		 762{
763 struct sk_buff *skb;
764 struct sadb_msg *hdr;
765 struct sadb_sa *sa;
766 struct sadb_lifetime *lifetime;
767 struct sadb_address *addr;
768 struct sadb_key *key;
769 struct sadb_x_sa2 *sa2;
df71837d
TJ		 770 struct sadb_x_sec_ctx *sec_ctx;
771 struct xfrm_sec_ctx *xfrm_ctx;
772 int ctx_size = 0;
1da177e4
LT		 773 int size;
774 int auth_key_size = 0;
775 int encrypt_key_size = 0;
776 int sockaddr_size;
777 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 778 int mode;
1da177e4
LT		 779
780 /* address family check */
781 sockaddr_size = pfkey_sockaddr_size(x->props.family);
782 if (!sockaddr_size)
783 return ERR_PTR(-EINVAL);
784
785 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
786 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 787 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 788 sizeof(struct sadb_lifetime) +
789 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
790 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 791 sizeof(struct sadb_address)*2 +
1da177e4
LT		 792 sockaddr_size*2 +
793 sizeof(struct sadb_x_sa2);
df71837d
TJ		 794
795 if ((xfrm_ctx = x->security)) {
796 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
797 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
798 }
799
1da177e4 800 /* identity & sensitivity */
70e94e66 801 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
1da177e4
LT		 802 size += sizeof(struct sadb_address) + sockaddr_size;
803
804 if (add_keys) {
805 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 806 auth_key_size =
807 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 808 size += sizeof(struct sadb_key) + auth_key_size;
809 }
810 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 811 encrypt_key_size =
812 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 813 size += sizeof(struct sadb_key) + encrypt_key_size;
814 }
815 }
816 if (x->encap)
817 natt = x->encap;
818
819 if (natt && natt->encap_type) {
820 size += sizeof(struct sadb_x_nat_t_type);
821 size += sizeof(struct sadb_x_nat_t_port);
822 size += sizeof(struct sadb_x_nat_t_port);
823 }
824
825 skb = alloc_skb(size + 16, GFP_ATOMIC);
826 if (skb == NULL)
827 return ERR_PTR(-ENOBUFS);
828
829 /* call should fill header later */
4df864c1 830 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 831 memset(hdr, 0, size); /* XXX do we need this ? */
832 hdr->sadb_msg_len = size / sizeof(uint64_t);
833
834 /* sa */
4df864c1 835 sa = skb_put(skb, sizeof(struct sadb_sa));
1da177e4
LT		 836 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
837 sa->sadb_sa_exttype = SADB_EXT_SA;
838 sa->sadb_sa_spi = x->id.spi;
839 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 840 switch (x->km.state) {
841 case XFRM_STATE_VALID:
842 sa->sadb_sa_state = x->km.dying ?
843 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
844 break;
845 case XFRM_STATE_ACQ:
1da177e4 846 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 847 break;
848 default:
1da177e4 849 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 850 break;
851 }
1da177e4
LT		 852 sa->sadb_sa_auth = 0;
853 if (x->aalg) {
854 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
7e50f84c
JK		 855 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
856 a->desc.sadb_alg_id : 0;
1da177e4
LT		 857 }
858 sa->sadb_sa_encrypt = 0;
859 BUG_ON(x->ealg && x->calg);
860 if (x->ealg) {
861 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
7e50f84c
JK		 862 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
863 a->desc.sadb_alg_id : 0;
1da177e4
LT		 864 }
865 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
866 if (x->calg) {
867 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
7e50f84c
JK		 868 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
869 a->desc.sadb_alg_id : 0;
1da177e4
LT		 870 }
871
872 sa->sadb_sa_flags = 0;
873 if (x->props.flags & XFRM_STATE_NOECN)
874 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
875 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
876 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 877 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
878 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 879
880 /* hard time */
881 if (hsc & 2) {
4df864c1 882 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 883 lifetime->sadb_lifetime_len =
884 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
885 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
886 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
887 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
888 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
889 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
890 }
891 /* soft time */
892 if (hsc & 1) {
4df864c1 893 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 894 lifetime->sadb_lifetime_len =
895 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
896 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
897 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
898 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
899 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
900 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
901 }
902 /* current time */
4df864c1 903 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 904 lifetime->sadb_lifetime_len =
905 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
906 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
907 lifetime->sadb_lifetime_allocations = x->curlft.packets;
908 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
909 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
910 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
911 /* src address */
4df864c1 912 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 913 addr->sadb_address_len =
1da177e4
LT		 914 (sizeof(struct sadb_address)+sockaddr_size)/
915 sizeof(uint64_t);
916 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 917 /* "if the ports are non-zero, then the sadb_address_proto field,
918 normally zero, MUST be filled in with the transport
1da177e4 919 protocol's number." - RFC2367 */
8ff24541 920 addr->sadb_address_proto = 0;
1da177e4 921 addr->sadb_address_reserved = 0;
1da177e4 922
e5b56652
YH		 923 addr->sadb_address_prefixlen =
924 pfkey_sockaddr_fill(&x->props.saddr, 0,
925 (struct sockaddr *) (addr + 1),
926 x->props.family);
de47c5d8 927 BUG_ON(!addr->sadb_address_prefixlen);
1da177e4
LT		 928
929 /* dst 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_DST;
8ff24541 935 addr->sadb_address_proto = 0;
1da177e4 936 addr->sadb_address_reserved = 0;
1da177e4 937
e5b56652
YH		 938 addr->sadb_address_prefixlen =
939 pfkey_sockaddr_fill(&x->id.daddr, 0,
940 (struct sockaddr *) (addr + 1),
941 x->props.family);
de47c5d8 942 BUG_ON(!addr->sadb_address_prefixlen);
1da177e4 943
70e94e66
YH		 944 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
945 x->props.family)) {
4df864c1
JB		 946 addr = skb_put(skb,
947 sizeof(struct sadb_address) + sockaddr_size);
e5b56652
YH		 948 addr->sadb_address_len =
949 (sizeof(struct sadb_address)+sockaddr_size)/
950 sizeof(uint64_t);
951 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
952 addr->sadb_address_proto =
953 pfkey_proto_from_xfrm(x->sel.proto);
954 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
955 addr->sadb_address_reserved = 0;
1da177e4 956
e5b56652
YH		 957 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
958 (struct sockaddr *) (addr + 1),
959 x->props.family);
1da177e4 960 }
1da177e4
LT		 961
962 /* auth key */
963 if (add_keys && auth_key_size) {
4df864c1 964 key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
1da177e4
LT		 965 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
966 sizeof(uint64_t);
967 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
968 key->sadb_key_bits = x->aalg->alg_key_len;
969 key->sadb_key_reserved = 0;
970 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
971 }
972 /* encrypt key */
973 if (add_keys && encrypt_key_size) {
4df864c1 974 key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
8ff24541 975 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 976 encrypt_key_size) / sizeof(uint64_t);
977 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
978 key->sadb_key_bits = x->ealg->alg_key_len;
979 key->sadb_key_reserved = 0;
8ff24541 980 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 981 (x->ealg->alg_key_len+7)/8);
982 }
983
984 /* sa */
4df864c1 985 sa2 = skb_put(skb, sizeof(struct sadb_x_sa2));
1da177e4
LT		 986 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
987 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 988 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
989 kfree_skb(skb);
990 return ERR_PTR(-EINVAL);
991 }
992 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 993 sa2->sadb_x_sa2_reserved1 = 0;
994 sa2->sadb_x_sa2_reserved2 = 0;
995 sa2->sadb_x_sa2_sequence = 0;
996 sa2->sadb_x_sa2_reqid = x->props.reqid;
997
998 if (natt && natt->encap_type) {
999 struct sadb_x_nat_t_type *n_type;
1000 struct sadb_x_nat_t_port *n_port;
1001
1002 /* type */
4df864c1 1003 n_type = skb_put(skb, sizeof(*n_type));
1da177e4
LT		 1004 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
1005 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
1006 n_type->sadb_x_nat_t_type_type = natt->encap_type;
1007 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1008 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1009 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1010
1011 /* source port */
4df864c1 1012 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 1013 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1014 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1015 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1016 n_port->sadb_x_nat_t_port_reserved = 0;
1017
1018 /* dest port */
4df864c1 1019 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 1020 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1021 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1022 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1023 n_port->sadb_x_nat_t_port_reserved = 0;
1024 }
1025
df71837d
TJ		 1026 /* security context */
1027 if (xfrm_ctx) {
4df864c1
JB		 1028 sec_ctx = skb_put(skb,
1029 sizeof(struct sadb_x_sec_ctx) + ctx_size);
df71837d
TJ		 1030 sec_ctx->sadb_x_sec_len =
1031 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1032 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1033 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1034 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1035 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1036 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1037 xfrm_ctx->ctx_len);
1038 }
1039
1da177e4
LT		 1040 return skb;
1041}
1042
050f009e 1043
4c93fbb0 1044static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
050f009e
HX		 1045{
1046 struct sk_buff *skb;
1047
050f009e 1048 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1049
1050 return skb;
1051}
1052
4c93fbb0 1053static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
050f009e
HX		 1054 int hsc)
1055{
1056 return __pfkey_xfrm_state2msg(x, 0, hsc);
1057}
1058
07fb0f17 1059static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
4c93fbb0
DM		 1060 const struct sadb_msg *hdr,
1061 void * const *ext_hdrs)
1da177e4 1062{
8ff24541 1063 struct xfrm_state *x;
4c93fbb0
DM		 1064 const struct sadb_lifetime *lifetime;
1065 const struct sadb_sa *sa;
1066 const struct sadb_key *key;
1067 const struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1068 uint16_t proto;
1069 int err;
8ff24541 1070
1da177e4 1071
ea110733 1072 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 1073 if (!sa ||
1074 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1075 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1076 return ERR_PTR(-EINVAL);
1077 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1078 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1079 return ERR_PTR(-EINVAL);
1080 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1081 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1082 return ERR_PTR(-EINVAL);
1083 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1084 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1085 return ERR_PTR(-EINVAL);
1086
1087 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1088 if (proto == 0)
1089 return ERR_PTR(-EINVAL);
1090
1091 /* default error is no buffer space */
1092 err = -ENOBUFS;
1093
1094 /* RFC2367:
1095
1096 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1097 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1098 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1099 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1100 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1101 not true.
1102
8ff24541 1103 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1104 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1105 */
1106 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1107 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1108 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1109 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1110 return ERR_PTR(-EINVAL);
ea110733 1111 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1112 if (key != NULL &&
1113 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
4b66af2d 1114 key->sadb_key_bits == 0)
1da177e4
LT		 1115 return ERR_PTR(-EINVAL);
1116 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1117 if (key != NULL &&
1118 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
4b66af2d 1119 key->sadb_key_bits == 0)
1da177e4
LT		 1120 return ERR_PTR(-EINVAL);
1121
07fb0f17 1122 x = xfrm_state_alloc(net);
1da177e4
LT		 1123 if (x == NULL)
1124 return ERR_PTR(-ENOBUFS);
1125
1126 x->id.proto = proto;
1127 x->id.spi = sa->sadb_sa_spi;
33fce60d
FD		 1128 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1129 (sizeof(x->replay.bitmap) * 8));
1da177e4
LT		 1130 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1131 x->props.flags |= XFRM_STATE_NOECN;
1132 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1133 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1134 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1135 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4 1136
ea110733 1137 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1da177e4
LT		 1138 if (lifetime != NULL) {
1139 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1140 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1141 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1142 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1143 }
ea110733 1144 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1da177e4
LT		 1145 if (lifetime != NULL) {
1146 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1147 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1148 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1149 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1150 }
df71837d 1151
ea110733 1152 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 1153 if (sec_ctx != NULL) {
87536a81 1154 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 1155
1156 if (!uctx)
1157 goto out;
1158
1159 err = security_xfrm_state_alloc(x, uctx);
1160 kfree(uctx);
1161
1162 if (err)
1163 goto out;
1164 }
1165
e747f643 1166 err = -ENOBUFS;
ea110733 1167 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1168 if (sa->sadb_sa_auth) {
1169 int keysize = 0;
1170 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
7e50f84c 1171 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1172 err = -ENOSYS;
1173 goto out;
1174 }
1175 if (key)
1176 keysize = (key->sadb_key_bits + 7) / 8;
1177 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1e3d0c2c
DC		 1178 if (!x->aalg) {
1179 err = -ENOMEM;
1da177e4 1180 goto out;
1e3d0c2c 1181 }
1da177e4
LT		 1182 strcpy(x->aalg->alg_name, a->name);
1183 x->aalg->alg_key_len = 0;
1184 if (key) {
1185 x->aalg->alg_key_len = key->sadb_key_bits;
1186 memcpy(x->aalg->alg_key, key+1, keysize);
1187 }
c20a66f4 1188 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1da177e4
LT		 1189 x->props.aalgo = sa->sadb_sa_auth;
1190 /* x->algo.flags = sa->sadb_sa_flags; */
1191 }
1192 if (sa->sadb_sa_encrypt) {
1193 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1194 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1195 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1196 err = -ENOSYS;
1197 goto out;
1198 }
1199 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1e3d0c2c
DC		 1200 if (!x->calg) {
1201 err = -ENOMEM;
1da177e4 1202 goto out;
1e3d0c2c 1203 }
1da177e4
LT		 1204 strcpy(x->calg->alg_name, a->name);
1205 x->props.calgo = sa->sadb_sa_encrypt;
1206 } else {
1207 int keysize = 0;
1208 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1209 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1210 err = -ENOSYS;
1211 goto out;
1212 }
1213 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1214 if (key)
1215 keysize = (key->sadb_key_bits + 7) / 8;
1216 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1e3d0c2c
DC		 1217 if (!x->ealg) {
1218 err = -ENOMEM;
1da177e4 1219 goto out;
1e3d0c2c 1220 }
1da177e4
LT		 1221 strcpy(x->ealg->alg_name, a->name);
1222 x->ealg->alg_key_len = 0;
1223 if (key) {
1224 x->ealg->alg_key_len = key->sadb_key_bits;
1225 memcpy(x->ealg->alg_key, key+1, keysize);
1226 }
1227 x->props.ealgo = sa->sadb_sa_encrypt;
69b0137f 1228 x->geniv = a->uinfo.encr.geniv;
1da177e4
LT		 1229 }
1230 }
1231 /* x->algo.flags = sa->sadb_sa_flags; */
1232
8ff24541 1233 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4 1234 &x->props.saddr);
8ff24541 1235 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1236 &x->id.daddr);
1237
1238 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
4c93fbb0 1239 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1240 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1241 if (mode < 0) {
1242 err = -EINVAL;
1243 goto out;
1244 }
1245 x->props.mode = mode;
1da177e4
LT		 1246 x->props.reqid = sa2->sadb_x_sa2_reqid;
1247 }
1248
1249 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
4c93fbb0 1250 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1da177e4
LT		 1251
1252 /* Nobody uses this, but we try. */
1253 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1254 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1255 }
1256
4da51056 1257 if (!x->sel.family)
4a4b6271
JL		 1258 x->sel.family = x->props.family;
1259
1da177e4 1260 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
4c93fbb0 1261 const struct sadb_x_nat_t_type* n_type;
1da177e4
LT		 1262 struct xfrm_encap_tmpl *natt;
1263
2f479651 1264 x->encap = kzalloc(sizeof(*x->encap), GFP_KERNEL);
1e3d0c2c
DC		 1265 if (!x->encap) {
1266 err = -ENOMEM;
1da177e4 1267 goto out;
1e3d0c2c 1268 }
1da177e4
LT		 1269
1270 natt = x->encap;
1271 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1272 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1273
1274 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
4c93fbb0 1275 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1276 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1277 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1278 }
1279 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
4c93fbb0 1280 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1281 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1282 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1283 }
1284 }
1285
72cb6962
HX		 1286 err = xfrm_init_state(x);
1287 if (err)
1da177e4 1288 goto out;
72cb6962 1289
1da177e4 1290 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1291 return x;
1292
1293out:
1294 x->km.state = XFRM_STATE_DEAD;
1295 xfrm_state_put(x);
1296 return ERR_PTR(err);
1297}
1298
4c93fbb0 1299static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1300{
1301 return -EOPNOTSUPP;
1302}
1303
4c93fbb0 1304static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1305{
07fb0f17 1306 struct net *net = sock_net(sk);
1da177e4
LT		 1307 struct sk_buff *resp_skb;
1308 struct sadb_x_sa2 *sa2;
1309 struct sadb_address *saddr, *daddr;
1310 struct sadb_msg *out_hdr;
658b219e 1311 struct sadb_spirange *range;
1da177e4 1312 struct xfrm_state *x = NULL;
55569ce2 1313 int mode;
658b219e
HX		 1314 int err;
1315 u32 min_spi, max_spi;
1da177e4
LT		 1316 u32 reqid;
1317 u8 proto;
1318 unsigned short family;
1319 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1320
1321 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1322 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1323 return -EINVAL;
1324
1325 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1326 if (proto == 0)
1327 return -EINVAL;
1328
1329 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1330 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1331 if (mode < 0)
1332 return -EINVAL;
1da177e4
LT		 1333 reqid = sa2->sadb_x_sa2_reqid;
1334 } else {
1335 mode = 0;
1336 reqid = 0;
1337 }
1338
1339 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1340 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1341
1342 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1343 switch (family) {
1344 case AF_INET:
1345 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1346 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1347 break;
dfd56b8b 1348#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1349 case AF_INET6:
1350 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1351 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1352 break;
1353#endif
1354 }
1355
1356 if (hdr->sadb_msg_seq) {
1ddf9916 1357 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq, UINT_MAX);
70e94e66 1358 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1da177e4
LT		 1359 xfrm_state_put(x);
1360 x = NULL;
1361 }
1362 }
1363
1364 if (!x)
1ddf9916
SK		 1365 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, 0, UINT_MAX,
1366 proto, xdaddr, xsaddr, 1, family);
1da177e4
LT		 1367
1368 if (x == NULL)
1369 return -ENOENT;
1370
658b219e
HX		 1371 min_spi = 0x100;
1372 max_spi = 0x0fffffff;
1da177e4 1373
658b219e
HX		 1374 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1375 if (range) {
1376 min_spi = range->sadb_spirange_min;
1377 max_spi = range->sadb_spirange_max;
1da177e4 1378 }
658b219e 1379
c2dad11e 1380 err = verify_spi_info(x->id.proto, min_spi, max_spi, NULL);
776e9dd9
FD		 1381 if (err) {
1382 xfrm_state_put(x);
1383 return err;
1384 }
1385
c2dad11e 1386 err = xfrm_alloc_spi(x, min_spi, max_spi, NULL);
050f009e 1387 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1388
1389 if (IS_ERR(resp_skb)) {
1390 xfrm_state_put(x);
1391 return PTR_ERR(resp_skb);
1392 }
1393
1394 out_hdr = (struct sadb_msg *) resp_skb->data;
1395 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1396 out_hdr->sadb_msg_type = SADB_GETSPI;
1397 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1398 out_hdr->sadb_msg_errno = 0;
1399 out_hdr->sadb_msg_reserved = 0;
1400 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1401 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1402
1403 xfrm_state_put(x);
1404
36f41f8f 1405 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1da177e4
LT		 1406
1407 return 0;
1408}
1409
4c93fbb0 1410static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1411{
07fb0f17 1412 struct net *net = sock_net(sk);
1da177e4
LT		 1413 struct xfrm_state *x;
1414
1415 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1416 return -EOPNOTSUPP;
1417
1418 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1419 return 0;
1420
1ddf9916 1421 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq, UINT_MAX);
1da177e4
LT		 1422 if (x == NULL)
1423 return 0;
1424
1425 spin_lock_bh(&x->lock);
5b8ef341 1426 if (x->km.state == XFRM_STATE_ACQ)
1da177e4 1427 x->km.state = XFRM_STATE_ERROR;
5b8ef341 1428
1da177e4
LT		 1429 spin_unlock_bh(&x->lock);
1430 xfrm_state_put(x);
1431 return 0;
1432}
1433
26b15dad
JHS		 1434static inline int event2poltype(int event)
1435{
1436 switch (event) {
f60f6b8f 1437 case XFRM_MSG_DELPOLICY:
26b15dad 1438 return SADB_X_SPDDELETE;
f60f6b8f 1439 case XFRM_MSG_NEWPOLICY:
26b15dad 1440 return SADB_X_SPDADD;
f60f6b8f 1441 case XFRM_MSG_UPDPOLICY:
26b15dad 1442 return SADB_X_SPDUPDATE;
f60f6b8f 1443 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1444 // return SADB_X_SPDEXPIRE;
1445 default:
207024b9 1446 pr_err("pfkey: Unknown policy event %d\n", event);
26b15dad
JHS		 1447 break;
1448 }
1449
1450 return 0;
1451}
1452
1453static inline int event2keytype(int event)
1454{
1455 switch (event) {
f60f6b8f 1456 case XFRM_MSG_DELSA:
26b15dad 1457 return SADB_DELETE;
f60f6b8f 1458 case XFRM_MSG_NEWSA:
26b15dad 1459 return SADB_ADD;
f60f6b8f 1460 case XFRM_MSG_UPDSA:
26b15dad 1461 return SADB_UPDATE;
f60f6b8f 1462 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1463 return SADB_EXPIRE;
1464 default:
207024b9 1465 pr_err("pfkey: Unknown SA event %d\n", event);
26b15dad
JHS		 1466 break;
1467 }
1468
1469 return 0;
1470}
1471
1472/* ADD/UPD/DEL */
214e005b 1473static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1474{
1475 struct sk_buff *skb;
1476 struct sadb_msg *hdr;
26b15dad 1477
050f009e 1478 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1479
1480 if (IS_ERR(skb))
1481 return PTR_ERR(skb);
1482
1483 hdr = (struct sadb_msg *) skb->data;
1484 hdr->sadb_msg_version = PF_KEY_V2;
1485 hdr->sadb_msg_type = event2keytype(c->event);
1486 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1487 hdr->sadb_msg_errno = 0;
1488 hdr->sadb_msg_reserved = 0;
1489 hdr->sadb_msg_seq = c->seq;
15e47304 1490 hdr->sadb_msg_pid = c->portid;
26b15dad 1491
36f41f8f 1492 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
26b15dad
JHS		 1493
1494 return 0;
1495}
1da177e4 1496
4c93fbb0 1497static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1498{
07fb0f17 1499 struct net *net = sock_net(sk);
1da177e4
LT		 1500 struct xfrm_state *x;
1501 int err;
26b15dad 1502 struct km_event c;
1da177e4 1503
07fb0f17 1504 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1da177e4
LT		 1505 if (IS_ERR(x))
1506 return PTR_ERR(x);
1507
26b15dad 1508 xfrm_state_hold(x);
1da177e4
LT		 1509 if (hdr->sadb_msg_type == SADB_ADD)
1510 err = xfrm_state_add(x);
1511 else
1512 err = xfrm_state_update(x);
1513
2e71029e 1514 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 1515
1da177e4
LT		 1516 if (err < 0) {
1517 x->km.state = XFRM_STATE_DEAD;
21380b81 1518 __xfrm_state_put(x);
7d6dfe1f 1519 goto out;
1da177e4
LT		 1520 }
1521
26b15dad 1522 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1523 c.event = XFRM_MSG_NEWSA;
26b15dad 1524 else
f60f6b8f 1525 c.event = XFRM_MSG_UPDSA;
26b15dad 1526 c.seq = hdr->sadb_msg_seq;
15e47304 1527 c.portid = hdr->sadb_msg_pid;
26b15dad 1528 km_state_notify(x, &c);
7d6dfe1f 1529out:
26b15dad 1530 xfrm_state_put(x);
26b15dad 1531 return err;
1da177e4
LT		 1532}
1533
4c93fbb0 1534static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1535{
07fb0f17 1536 struct net *net = sock_net(sk);
1da177e4 1537 struct xfrm_state *x;
26b15dad
JHS		 1538 struct km_event c;
1539 int err;
1da177e4
LT		 1540
1541 if (!ext_hdrs[SADB_EXT_SA-1] ||
1542 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1543 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1544 return -EINVAL;
1545
07fb0f17 1546 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1547 if (x == NULL)
1548 return -ESRCH;
1549
c8c05a8e
CZ		 1550 if ((err = security_xfrm_state_delete(x)))
1551 goto out;
1552
1da177e4 1553 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1554 err = -EPERM;
1555 goto out;
1da177e4 1556 }
161a09e7 1557
26b15dad 1558 err = xfrm_state_delete(x);
161a09e7 1559
c8c05a8e
CZ		 1560 if (err < 0)
1561 goto out;
1da177e4 1562
26b15dad 1563 c.seq = hdr->sadb_msg_seq;
15e47304 1564 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1565 c.event = XFRM_MSG_DELSA;
26b15dad 1566 km_state_notify(x, &c);
c8c05a8e 1567out:
2e71029e 1568 xfrm_audit_state_delete(x, err ? 0 : 1, true);
26b15dad 1569 xfrm_state_put(x);
1da177e4 1570
26b15dad 1571 return err;
1da177e4
LT		 1572}
1573
4c93fbb0 1574static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1575{
07fb0f17 1576 struct net *net = sock_net(sk);
1da177e4
LT		 1577 __u8 proto;
1578 struct sk_buff *out_skb;
1579 struct sadb_msg *out_hdr;
1580 struct xfrm_state *x;
1581
1582 if (!ext_hdrs[SADB_EXT_SA-1] ||
1583 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1584 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1585 return -EINVAL;
1586
07fb0f17 1587 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1588 if (x == NULL)
1589 return -ESRCH;
1590
050f009e 1591 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1592 proto = x->id.proto;
1593 xfrm_state_put(x);
1594 if (IS_ERR(out_skb))
1595 return PTR_ERR(out_skb);
1596
1597 out_hdr = (struct sadb_msg *) out_skb->data;
1598 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1599 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1600 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1601 out_hdr->sadb_msg_errno = 0;
1602 out_hdr->sadb_msg_reserved = 0;
1603 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1604 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
36f41f8f 1605 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 1606
1607 return 0;
1608}
1609
4c93fbb0 1610static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
dd0fc66f 1611 gfp_t allocation)
1da177e4
LT		 1612{
1613 struct sk_buff *skb;
1614 struct sadb_msg *hdr;
1615 int len, auth_len, enc_len, i;
1616
7e50f84c 1617 auth_len = xfrm_count_pfkey_auth_supported();
1da177e4
LT		 1618 if (auth_len) {
1619 auth_len *= sizeof(struct sadb_alg);
1620 auth_len += sizeof(struct sadb_supported);
1621 }
8ff24541 1622
7e50f84c 1623 enc_len = xfrm_count_pfkey_enc_supported();
1da177e4
LT		 1624 if (enc_len) {
1625 enc_len *= sizeof(struct sadb_alg);
1626 enc_len += sizeof(struct sadb_supported);
1627 }
8ff24541 1628
1da177e4
LT		 1629 len = enc_len + auth_len + sizeof(struct sadb_msg);
1630
1631 skb = alloc_skb(len + 16, allocation);
1632 if (!skb)
1633 goto out_put_algs;
1634
4df864c1 1635 hdr = skb_put(skb, sizeof(*hdr));
1da177e4
LT		 1636 pfkey_hdr_dup(hdr, orig);
1637 hdr->sadb_msg_errno = 0;
1638 hdr->sadb_msg_len = len / sizeof(uint64_t);
1639
1640 if (auth_len) {
1641 struct sadb_supported *sp;
1642 struct sadb_alg *ap;
1643
4df864c1 1644 sp = skb_put(skb, auth_len);
1da177e4
LT		 1645 ap = (struct sadb_alg *) (sp + 1);
1646
1647 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1648 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1649
1650 for (i = 0; ; i++) {
1651 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1652 if (!aalg)
1653 break;
7e50f84c
JK		 1654 if (!aalg->pfkey_supported)
1655 continue;
1da177e4
LT		 1656 if (aalg->available)
1657 *ap++ = aalg->desc;
1658 }
1659 }
1660
1661 if (enc_len) {
1662 struct sadb_supported *sp;
1663 struct sadb_alg *ap;
1664
4df864c1 1665 sp = skb_put(skb, enc_len);
1da177e4
LT		 1666 ap = (struct sadb_alg *) (sp + 1);
1667
1668 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1669 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1670
1671 for (i = 0; ; i++) {
1672 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1673 if (!ealg)
1674 break;
7e50f84c
JK		 1675 if (!ealg->pfkey_supported)
1676 continue;
1da177e4
LT		 1677 if (ealg->available)
1678 *ap++ = ealg->desc;
1679 }
1680 }
1681
1682out_put_algs:
1683 return skb;
1684}
1685
4c93fbb0 1686static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1687{
1688 struct pfkey_sock *pfk = pfkey_sk(sk);
1689 struct sk_buff *supp_skb;
1690
1691 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1692 return -EINVAL;
1693
1694 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1695 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1696 return -EEXIST;
1697 pfk->registered |= (1<<hdr->sadb_msg_satype);
1698 }
1699
ba953a9d 1700 mutex_lock(&pfkey_mutex);
1da177e4 1701 xfrm_probe_algs();
8ff24541 1702
9a564bcc 1703 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO);
ba953a9d
HX		 1704 mutex_unlock(&pfkey_mutex);
1705
1da177e4
LT		 1706 if (!supp_skb) {
1707 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1708 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1709
1710 return -ENOBUFS;
1711 }
1712
36f41f8f
ED		 1713 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk,
1714 sock_net(sk));
1da177e4
LT		 1715 return 0;
1716}
1717
4c93fbb0 1718static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
8be987d7
JHS		 1719{
1720 struct sk_buff *skb;
1721 struct sadb_msg *hdr;
1722
1723 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1724 if (!skb)
1725 return -ENOBUFS;
1726
59ae1d12 1727 hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg));
8be987d7
JHS		 1728 hdr->sadb_msg_errno = (uint8_t) 0;
1729 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1730
36f41f8f
ED		 1731 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk,
1732 sock_net(sk));
8be987d7
JHS		 1733}
1734
214e005b 1735static int key_notify_sa_flush(const struct km_event *c)
26b15dad
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;
4df864c1 1743 hdr = skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1744 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1745 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad 1746 hdr->sadb_msg_seq = c->seq;
15e47304 1747 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 1748 hdr->sadb_msg_version = PF_KEY_V2;
1749 hdr->sadb_msg_errno = (uint8_t) 0;
1750 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 1751 hdr->sadb_msg_reserved = 0;
26b15dad 1752
36f41f8f 1753 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad
JHS		 1754
1755 return 0;
1756}
1757
4c93fbb0 1758static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1759{
07fb0f17 1760 struct net *net = sock_net(sk);
95c96174 1761 unsigned int proto;
26b15dad 1762 struct km_event c;
8be987d7 1763 int err, err2;
1da177e4
LT		 1764
1765 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1766 if (proto == 0)
1767 return -EINVAL;
1768
f75a2804 1769 err = xfrm_state_flush(net, proto, true, false);
8be987d7 1770 err2 = unicast_flush_resp(sk, hdr);
9e64cc95
JHS		 1771 if (err || err2) {
1772 if (err == -ESRCH) /* empty table - go quietly */
1773 err = 0;
8be987d7 1774 return err ? err : err2;
9e64cc95 1775 }
8be987d7 1776
bf08867f 1777 c.data.proto = proto;
26b15dad 1778 c.seq = hdr->sadb_msg_seq;
15e47304 1779 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1780 c.event = XFRM_MSG_FLUSHSA;
07fb0f17 1781 c.net = net;
26b15dad 1782 km_state_notify(NULL, &c);
1da177e4
LT		 1783
1784 return 0;
1785}
1786
1da177e4
LT		 1787static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1788{
83321d6b 1789 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 1790 struct sk_buff *out_skb;
1791 struct sadb_msg *out_hdr;
1792
83321d6b
TT		 1793 if (!pfkey_can_dump(&pfk->sk))
1794 return -ENOBUFS;
1795
050f009e 1796 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1797 if (IS_ERR(out_skb))
1798 return PTR_ERR(out_skb);
1799
1800 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 1801 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 1802 out_hdr->sadb_msg_type = SADB_DUMP;
1803 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1804 out_hdr->sadb_msg_errno = 0;
1805 out_hdr->sadb_msg_reserved = 0;
12a169e7 1806 out_hdr->sadb_msg_seq = count + 1;
15e47304 1807 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 1808
1809 if (pfk->dump.skb)
36f41f8f 1810 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 1811 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 1812 pfk->dump.skb = out_skb;
1813
1da177e4
LT		 1814 return 0;
1815}
1816
83321d6b
TT		 1817static int pfkey_dump_sa(struct pfkey_sock *pfk)
1818{
07fb0f17
AD		 1819 struct net *net = sock_net(&pfk->sk);
1820 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
83321d6b
TT		 1821}
1822
1823static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1824{
283bc9f3
FD		 1825 struct net *net = sock_net(&pfk->sk);
1826
1827 xfrm_state_walk_done(&pfk->dump.u.state, net);
83321d6b
TT		 1828}
1829
4c93fbb0 1830static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1831{
1832 u8 proto;
870a2df4 1833 struct xfrm_address_filter *filter = NULL;
83321d6b
TT		 1834 struct pfkey_sock *pfk = pfkey_sk(sk);
1835
89e357d8
YS		 1836 mutex_lock(&pfk->dump_lock);
1837 if (pfk->dump.dump != NULL) {
1838 mutex_unlock(&pfk->dump_lock);
83321d6b 1839 return -EBUSY;
89e357d8 1840 }
1da177e4
LT		 1841
1842 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
89e357d8
YS		 1843 if (proto == 0) {
1844 mutex_unlock(&pfk->dump_lock);
1da177e4 1845 return -EINVAL;
89e357d8 1846 }
1da177e4 1847
d3623099
ND		 1848 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1849 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1850
75065a89 1851 if ((xfilter->sadb_x_filter_splen >
37bd2242 1852 (sizeof(xfrm_address_t) << 3)) ||
75065a89 1853 (xfilter->sadb_x_filter_dplen >
37bd2242
MS		 1854 (sizeof(xfrm_address_t) << 3))) {
1855 mutex_unlock(&pfk->dump_lock);
1856 return -EINVAL;
1857 }
d3623099 1858 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
89e357d8
YS		 1859 if (filter == NULL) {
1860 mutex_unlock(&pfk->dump_lock);
d3623099 1861 return -ENOMEM;
89e357d8 1862 }
d3623099
ND		 1863
1864 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1865 sizeof(xfrm_address_t));
1866 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1867 sizeof(xfrm_address_t));
1868 filter->family = xfilter->sadb_x_filter_family;
1869 filter->splen = xfilter->sadb_x_filter_splen;
1870 filter->dplen = xfilter->sadb_x_filter_dplen;
1871 }
1872
83321d6b 1873 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 1874 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 1875 pfk->dump.dump = pfkey_dump_sa;
1876 pfk->dump.done = pfkey_dump_sa_done;
d3623099 1877 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
89e357d8 1878 mutex_unlock(&pfk->dump_lock);
4c563f76 1879
83321d6b 1880 return pfkey_do_dump(pfk);
1da177e4
LT		 1881}
1882
4c93fbb0 1883static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1884{
1885 struct pfkey_sock *pfk = pfkey_sk(sk);
1886 int satype = hdr->sadb_msg_satype;
4c93fbb0 1887 bool reset_errno = false;
1da177e4
LT		 1888
1889 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
4c93fbb0 1890 reset_errno = true;
1da177e4
LT		 1891 if (satype != 0 && satype != 1)
1892 return -EINVAL;
1893 pfk->promisc = satype;
1894 }
4c93fbb0
DM		 1895 if (reset_errno && skb_cloned(skb))
1896 skb = skb_copy(skb, GFP_KERNEL);
1897 else
1898 skb = skb_clone(skb, GFP_KERNEL);
1899
1900 if (reset_errno && skb) {
1901 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1902 new_hdr->sadb_msg_errno = 0;
1903 }
1904
36f41f8f 1905 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1da177e4
LT		 1906 return 0;
1907}
1908
1909static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1910{
1911 int i;
1912 u32 reqid = *(u32*)ptr;
1913
1914 for (i=0; i<xp->xfrm_nr; i++) {
1915 if (xp->xfrm_vec[i].reqid == reqid)
1916 return -EEXIST;
1917 }
1918 return 0;
1919}
1920
07fb0f17 1921static u32 gen_reqid(struct net *net)
1da177e4 1922{
4c563f76 1923 struct xfrm_policy_walk walk;
1da177e4 1924 u32 start;
4c563f76 1925 int rc;
1da177e4
LT		 1926 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1927
1928 start = reqid;
1929 do {
1930 ++reqid;
1931 if (reqid == 0)
1932 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76 1933 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
07fb0f17 1934 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
283bc9f3 1935 xfrm_policy_walk_done(&walk, net);
4c563f76 1936 if (rc != -EEXIST)
1da177e4
LT		 1937 return reqid;
1938 } while (reqid != start);
1939 return 0;
1940}
1941
1942static int
cf3128a7
TB		 1943parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_policy *pol,
1944 struct sadb_x_ipsecrequest *rq)
1da177e4 1945{
07fb0f17 1946 struct net *net = xp_net(xp);
1da177e4 1947 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
55569ce2 1948 int mode;
1da177e4
LT		 1949
1950 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1951 return -ELOOP;
1952
1953 if (rq->sadb_x_ipsecrequest_mode == 0)
1954 return -EINVAL;
dbb2483b
CW		 1955 if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto))
1956 return -EINVAL;
1da177e4 1957
dbb2483b 1958 t->id.proto = rq->sadb_x_ipsecrequest_proto;
55569ce2
KM		 1959 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1960 return -EINVAL;
1961 t->mode = mode;
cf3128a7
TB		 1962 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) {
1963 if ((mode == XFRM_MODE_TUNNEL || mode == XFRM_MODE_BEET) &&
1964 pol->sadb_x_policy_dir == IPSEC_DIR_OUTBOUND)
1965 return -EINVAL;
1da177e4 1966 t->optional = 1;
cf3128a7 1967 } else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1da177e4
LT		 1968 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1969 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1970 t->reqid = 0;
07fb0f17 1971 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1da177e4
LT		 1972 return -ENOBUFS;
1973 }
1974
1975 /* addresses present only in tunnel mode */
7e49e6de 1976 if (t->mode == XFRM_MODE_TUNNEL) {
096f41d3 1977 int err;
5f95ac91 1978
096f41d3
HX		 1979 err = parse_sockaddr_pair(
1980 (struct sockaddr *)(rq + 1),
1981 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1982 &t->saddr, &t->id.daddr, &t->encap_family);
1983 if (err)
1984 return err;
2718aa7c
MK		 1985 } else
1986 t->encap_family = xp->family;
1987
1da177e4 1988 /* No way to set this via kame pfkey */
c5d18e98 1989 t->allalgs = 1;
1da177e4
LT		 1990 xp->xfrm_nr++;
1991 return 0;
1992}
1993
1994static int
1995parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1996{
1997 int err;
1998 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1999 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
2000
f674e72f
DC		 2001 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
2002 return -EINVAL;
2003
096f41d3
HX		 2004 while (len >= sizeof(*rq)) {
2005 if (len < rq->sadb_x_ipsecrequest_len ||
2006 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
2007 return -EINVAL;
2008
cf3128a7 2009 if ((err = parse_ipsecrequest(xp, pol, rq)) < 0)
1da177e4
LT		 2010 return err;
2011 len -= rq->sadb_x_ipsecrequest_len;
2012 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
2013 }
2014 return 0;
2015}
2016
4c93fbb0 2017static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
df71837d 2018{
4fc735d9 2019 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
df71837d
TJ		 2020
2021 if (xfrm_ctx) {
2022 int len = sizeof(struct sadb_x_sec_ctx);
2023 len += xfrm_ctx->ctx_len;
2024 return PFKEY_ALIGN8(len);
2025 }
2026 return 0;
2027}
2028
4c93fbb0 2029static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1da177e4 2030{
4c93fbb0 2031 const struct xfrm_tmpl *t;
1da177e4 2032 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 2033 int socklen = 0;
2034 int i;
2035
2036 for (i=0; i<xp->xfrm_nr; i++) {
2037 t = xp->xfrm_vec + i;
9e8b4ed8 2038 socklen += pfkey_sockaddr_len(t->encap_family);
2718aa7c 2039 }
1da177e4
LT		 2040
2041 return sizeof(struct sadb_msg) +
2042 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 2043 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 2044 (sockaddr_size * 2) +
2045 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 2046 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2047 (socklen * 2) +
df71837d 2048 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 2049}
2050
4c93fbb0 2051static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1da177e4
LT		 2052{
2053 struct sk_buff *skb;
2054 int size;
2055
2056 size = pfkey_xfrm_policy2msg_size(xp);
2057
2058 skb = alloc_skb(size + 16, GFP_ATOMIC);
2059 if (skb == NULL)
2060 return ERR_PTR(-ENOBUFS);
2061
2062 return skb;
2063}
2064
4c93fbb0 2065static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
1da177e4
LT		 2066{
2067 struct sadb_msg *hdr;
2068 struct sadb_address *addr;
2069 struct sadb_lifetime *lifetime;
2070 struct sadb_x_policy *pol;
df71837d
TJ		 2071 struct sadb_x_sec_ctx *sec_ctx;
2072 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 2073 int i;
2074 int size;
2075 int sockaddr_size = pfkey_sockaddr_size(xp->family);
9e8b4ed8 2076 int socklen = pfkey_sockaddr_len(xp->family);
1da177e4
LT		 2077
2078 size = pfkey_xfrm_policy2msg_size(xp);
2079
2080 /* call should fill header later */
4df864c1 2081 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 2082 memset(hdr, 0, size); /* XXX do we need this ? */
2083
2084 /* src address */
4df864c1 2085 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 2086 addr->sadb_address_len =
1da177e4
LT		 2087 (sizeof(struct sadb_address)+sockaddr_size)/
2088 sizeof(uint64_t);
2089 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2090 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2091 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2092 addr->sadb_address_reserved = 0;
e5b56652
YH		 2093 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2094 xp->selector.sport,
2095 (struct sockaddr *) (addr + 1),
2096 xp->family))
1da177e4
LT		 2097 BUG();
2098
2099 /* dst address */
4df864c1 2100 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
1da177e4
LT		 2101 addr->sadb_address_len =
2102 (sizeof(struct sadb_address)+sockaddr_size)/
2103 sizeof(uint64_t);
2104 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2105 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2106 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4 2107 addr->sadb_address_reserved = 0;
e5b56652
YH		 2108
2109 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2110 (struct sockaddr *) (addr + 1),
2111 xp->family);
1da177e4
LT		 2112
2113 /* hard time */
4df864c1 2114 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 2115 lifetime->sadb_lifetime_len =
2116 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2117 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2118 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2119 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2120 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2121 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2122 /* soft time */
4df864c1 2123 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 2124 lifetime->sadb_lifetime_len =
2125 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2126 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2127 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2128 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2129 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2130 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2131 /* current time */
4df864c1 2132 lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
1da177e4
LT		 2133 lifetime->sadb_lifetime_len =
2134 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2135 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2136 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2137 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2138 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2139 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2140
4df864c1 2141 pol = skb_put(skb, sizeof(struct sadb_x_policy));
1da177e4
LT		 2142 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2143 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2144 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2145 if (xp->action == XFRM_POLICY_ALLOW) {
2146 if (xp->xfrm_nr)
2147 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2148 else
2149 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2150 }
2151 pol->sadb_x_policy_dir = dir+1;
ff862a46 2152 pol->sadb_x_policy_reserved = 0;
1da177e4
LT		 2153 pol->sadb_x_policy_id = xp->index;
2154 pol->sadb_x_policy_priority = xp->priority;
2155
2156 for (i=0; i<xp->xfrm_nr; i++) {
4c93fbb0 2157 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
1da177e4 2158 struct sadb_x_ipsecrequest *rq;
1da177e4 2159 int req_size;
55569ce2 2160 int mode;
1da177e4
LT		 2161
2162 req_size = sizeof(struct sadb_x_ipsecrequest);
e5b56652
YH		 2163 if (t->mode == XFRM_MODE_TUNNEL) {
2164 socklen = pfkey_sockaddr_len(t->encap_family);
2165 req_size += socklen * 2;
2166 } else {
1da177e4 2167 size -= 2*socklen;
e5b56652 2168 }
4df864c1 2169 rq = skb_put(skb, req_size);
1da177e4
LT		 2170 pol->sadb_x_policy_len += req_size/8;
2171 memset(rq, 0, sizeof(*rq));
2172 rq->sadb_x_ipsecrequest_len = req_size;
2173 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2174 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2175 return -EINVAL;
fefaa75e 2176 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2177 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2178 if (t->reqid)
2179 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2180 if (t->optional)
2181 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2182 rq->sadb_x_ipsecrequest_reqid = t->reqid;
e5b56652 2183
7e49e6de 2184 if (t->mode == XFRM_MODE_TUNNEL) {
e5b56652
YH		 2185 u8 *sa = (void *)(rq + 1);
2186 pfkey_sockaddr_fill(&t->saddr, 0,
2187 (struct sockaddr *)sa,
2188 t->encap_family);
2189 pfkey_sockaddr_fill(&t->id.daddr, 0,
2190 (struct sockaddr *) (sa + socklen),
2191 t->encap_family);
1da177e4
LT		 2192 }
2193 }
df71837d
TJ		 2194
2195 /* security context */
2196 if ((xfrm_ctx = xp->security)) {
2197 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2198
4df864c1 2199 sec_ctx = skb_put(skb, ctx_size);
df71837d
TJ		 2200 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2201 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2202 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2203 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2204 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2205 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2206 xfrm_ctx->ctx_len);
2207 }
2208
1da177e4 2209 hdr->sadb_msg_len = size / sizeof(uint64_t);
850a6212 2210 hdr->sadb_msg_reserved = refcount_read(&xp->refcnt);
55569ce2
KM		 2211
2212 return 0;
1da177e4
LT		 2213}
2214
214e005b 2215static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2216{
2217 struct sk_buff *out_skb;
2218 struct sadb_msg *out_hdr;
2219 int err;
2220
2221 out_skb = pfkey_xfrm_policy2msg_prep(xp);
9a127aad
DC		 2222 if (IS_ERR(out_skb))
2223 return PTR_ERR(out_skb);
2224
55569ce2 2225 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
1e532d2b
SK		 2226 if (err < 0) {
2227 kfree_skb(out_skb);
55569ce2 2228 return err;
1e532d2b 2229 }
26b15dad
JHS		 2230
2231 out_hdr = (struct sadb_msg *) out_skb->data;
2232 out_hdr->sadb_msg_version = PF_KEY_V2;
2233
f60f6b8f 2234 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2235 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2236 else
2237 out_hdr->sadb_msg_type = event2poltype(c->event);
2238 out_hdr->sadb_msg_errno = 0;
2239 out_hdr->sadb_msg_seq = c->seq;
15e47304 2240 out_hdr->sadb_msg_pid = c->portid;
36f41f8f 2241 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
26b15dad
JHS		 2242 return 0;
2243
2244}
2245
4c93fbb0 2246static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2247{
07fb0f17 2248 struct net *net = sock_net(sk);
df71837d 2249 int err = 0;
1da177e4
LT		 2250 struct sadb_lifetime *lifetime;
2251 struct sadb_address *sa;
2252 struct sadb_x_policy *pol;
2253 struct xfrm_policy *xp;
26b15dad 2254 struct km_event c;
df71837d 2255 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2256
2257 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2258 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2259 !ext_hdrs[SADB_X_EXT_POLICY-1])
2260 return -EINVAL;
2261
2262 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2263 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2264 return -EINVAL;
2265 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2266 return -EINVAL;
2267
07fb0f17 2268 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2269 if (xp == NULL)
2270 return -ENOBUFS;
2271
2272 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2273 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2274 xp->priority = pol->sadb_x_policy_priority;
2275
d0d79c3f 2276 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4 2277 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
1da177e4
LT		 2278 xp->selector.family = xp->family;
2279 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2280 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2281 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2282 if (xp->selector.sport)
8f83f23e 2283 xp->selector.sport_mask = htons(0xffff);
1da177e4 2284
d0d79c3f 2285 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2286 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2287 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2288
2289 /* Amusing, we set this twice. KAME apps appear to set same value
2290 * in both addresses.
2291 */
2292 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2293
2294 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2295 if (xp->selector.dport)
8f83f23e 2296 xp->selector.dport_mask = htons(0xffff);
1da177e4 2297
ea110733 2298 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2299 if (sec_ctx != NULL) {
87536a81 2300 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2301
2302 if (!uctx) {
2303 err = -ENOBUFS;
2304 goto out;
2305 }
2306
52a4c640 2307 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
df71837d
TJ		 2308 kfree(uctx);
2309
2310 if (err)
2311 goto out;
2312 }
2313
1da177e4
LT		 2314 xp->lft.soft_byte_limit = XFRM_INF;
2315 xp->lft.hard_byte_limit = XFRM_INF;
2316 xp->lft.soft_packet_limit = XFRM_INF;
2317 xp->lft.hard_packet_limit = XFRM_INF;
2318 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2319 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2320 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2321 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2322 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2323 }
2324 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2325 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2326 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2327 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2328 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2329 }
2330 xp->xfrm_nr = 0;
2331 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2332 (err = parse_ipsecrequests(xp, pol)) < 0)
2333 goto out;
2334
1da177e4
LT		 2335 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2336 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2337
2e71029e 2338 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 2339
df71837d
TJ		 2340 if (err)
2341 goto out;
1da177e4 2342
26b15dad 2343 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2344 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2345 else
f60f6b8f 2346 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2347
26b15dad 2348 c.seq = hdr->sadb_msg_seq;
15e47304 2349 c.portid = hdr->sadb_msg_pid;
1da177e4 2350
26b15dad
JHS		 2351 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2352 xfrm_pol_put(xp);
1da177e4
LT		 2353 return 0;
2354
2355out:
12a169e7 2356 xp->walk.dead = 1;
64c31b3f 2357 xfrm_policy_destroy(xp);
1da177e4
LT		 2358 return err;
2359}
2360
4c93fbb0 2361static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2362{
07fb0f17 2363 struct net *net = sock_net(sk);
1da177e4
LT		 2364 int err;
2365 struct sadb_address *sa;
2366 struct sadb_x_policy *pol;
03e1ad7b 2367 struct xfrm_policy *xp;
1da177e4 2368 struct xfrm_selector sel;
26b15dad 2369 struct km_event c;
df71837d 2370 struct sadb_x_sec_ctx *sec_ctx;
2db3e47e 2371 struct xfrm_sec_ctx *pol_ctx = NULL;
1da177e4
LT		 2372
2373 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2374 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2375 !ext_hdrs[SADB_X_EXT_POLICY-1])
2376 return -EINVAL;
2377
2378 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2379 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2380 return -EINVAL;
2381
2382 memset(&sel, 0, sizeof(sel));
2383
d0d79c3f 2384 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4
LT		 2385 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2386 sel.prefixlen_s = sa->sadb_address_prefixlen;
2387 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2388 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2389 if (sel.sport)
8f83f23e 2390 sel.sport_mask = htons(0xffff);
1da177e4 2391
d0d79c3f 2392 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2393 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2394 sel.prefixlen_d = sa->sadb_address_prefixlen;
2395 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2396 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2397 if (sel.dport)
8f83f23e 2398 sel.dport_mask = htons(0xffff);
1da177e4 2399
ea110733 2400 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2401 if (sec_ctx != NULL) {
87536a81 2402 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2403
2404 if (!uctx)
2405 return -ENOMEM;
2406
52a4c640 2407 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
df71837d 2408 kfree(uctx);
df71837d
TJ		 2409 if (err)
2410 return err;
2db3e47e 2411 }
161a09e7 2412
4f47e8ab 2413 xp = xfrm_policy_bysel_ctx(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
03e1ad7b
PM		 2414 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2415 1, &err);
2416 security_xfrm_policy_free(pol_ctx);
1da177e4
LT		 2417 if (xp == NULL)
2418 return -ENOENT;
2419
2e71029e 2420 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 2421
2422 if (err)
c8c05a8e 2423 goto out;
13fcfbb0 2424
26b15dad 2425 c.seq = hdr->sadb_msg_seq;
15e47304 2426 c.portid = hdr->sadb_msg_pid;
1839faab 2427 c.data.byid = 0;
f60f6b8f 2428 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2429 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2430
c8c05a8e 2431out:
26b15dad
JHS		 2432 xfrm_pol_put(xp);
2433 return err;
2434}
2435
4c93fbb0 2436static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
26b15dad
JHS		 2437{
2438 int err;
2439 struct sk_buff *out_skb;
2440 struct sadb_msg *out_hdr;
2441 err = 0;
2442
1da177e4
LT		 2443 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2444 if (IS_ERR(out_skb)) {
2445 err = PTR_ERR(out_skb);
2446 goto out;
2447 }
55569ce2 2448 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
7c80eb1c
JS		 2449 if (err < 0) {
2450 kfree_skb(out_skb);
55569ce2 2451 goto out;
7c80eb1c 2452 }
1da177e4
LT		 2453
2454 out_hdr = (struct sadb_msg *) out_skb->data;
2455 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2456 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2457 out_hdr->sadb_msg_satype = 0;
2458 out_hdr->sadb_msg_errno = 0;
2459 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2460 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
36f41f8f 2461 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
1da177e4
LT		 2462 err = 0;
2463
2464out:
1da177e4
LT		 2465 return err;
2466}
2467
08de61be
SS		 2468static int pfkey_sockaddr_pair_size(sa_family_t family)
2469{
9e8b4ed8 2470 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
08de61be
SS		 2471}
2472
13c1d189 2473static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
08de61be
SS		 2474 xfrm_address_t *saddr, xfrm_address_t *daddr,
2475 u16 *family)
2476{
5f95ac91
YH		 2477 int af, socklen;
2478
096f41d3 2479 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
08de61be
SS		 2480 return -EINVAL;
2481
13c1d189 2482 af = pfkey_sockaddr_extract(sa, saddr);
5f95ac91
YH		 2483 if (!af)
2484 return -EINVAL;
2485
2486 socklen = pfkey_sockaddr_len(af);
13c1d189 2487 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
5f95ac91 2488 daddr) != af)
08de61be 2489 return -EINVAL;
08de61be 2490
5f95ac91 2491 *family = af;
08de61be
SS		 2492 return 0;
2493}
2494
096f41d3 2495#ifdef CONFIG_NET_KEY_MIGRATE
08de61be
SS		 2496static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2497 struct xfrm_migrate *m)
2498{
2499 int err;
2500 struct sadb_x_ipsecrequest *rq2;
55569ce2 2501 int mode;
08de61be 2502
096f41d3
HX		 2503 if (len < sizeof(*rq1) ||
2504 len < rq1->sadb_x_ipsecrequest_len ||
2505 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
08de61be
SS		 2506 return -EINVAL;
2507
2508 /* old endoints */
13c1d189 2509 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
096f41d3 2510 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
13c1d189 2511 &m->old_saddr, &m->old_daddr,
08de61be
SS		 2512 &m->old_family);
2513 if (err)
2514 return err;
2515
2516 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2517 len -= rq1->sadb_x_ipsecrequest_len;
2518
096f41d3
HX		 2519 if (len <= sizeof(*rq2) ||
2520 len < rq2->sadb_x_ipsecrequest_len ||
2521 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
08de61be
SS		 2522 return -EINVAL;
2523
2524 /* new endpoints */
13c1d189 2525 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
096f41d3 2526 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
13c1d189 2527 &m->new_saddr, &m->new_daddr,
08de61be
SS		 2528 &m->new_family);
2529 if (err)
2530 return err;
2531
2532 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2533 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2534 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2535 return -EINVAL;
2536
2537 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2538 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2539 return -EINVAL;
2540 m->mode = mode;
08de61be
SS		 2541 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2542
2543 return ((int)(rq1->sadb_x_ipsecrequest_len +
2544 rq2->sadb_x_ipsecrequest_len));
2545}
2546
2547static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2548 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2549{
2550 int i, len, ret, err = -EINVAL;
2551 u8 dir;
2552 struct sadb_address *sa;
13c1d189 2553 struct sadb_x_kmaddress *kma;
08de61be
SS		 2554 struct sadb_x_policy *pol;
2555 struct sadb_x_ipsecrequest *rq;
2556 struct xfrm_selector sel;
2557 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2558 struct xfrm_kmaddress k;
8d549c4f 2559 struct net *net = sock_net(sk);
08de61be
SS		 2560
2561 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
13c1d189 2562 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
08de61be
SS		 2563 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2564 err = -EINVAL;
2565 goto out;
2566 }
2567
13c1d189 2568 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
08de61be 2569 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
08de61be
SS		 2570
2571 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2572 err = -EINVAL;
2573 goto out;
2574 }
2575
13c1d189
AE		 2576 if (kma) {
2577 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2578 k.reserved = kma->sadb_x_kmaddress_reserved;
2579 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2580 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2581 &k.local, &k.remote, &k.family);
2582 if (ret < 0) {
2583 err = ret;
2584 goto out;
2585 }
2586 }
2587
08de61be
SS		 2588 dir = pol->sadb_x_policy_dir - 1;
2589 memset(&sel, 0, sizeof(sel));
2590
2591 /* set source address info of selector */
2592 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2593 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2594 sel.prefixlen_s = sa->sadb_address_prefixlen;
2595 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2596 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2597 if (sel.sport)
582ee43d 2598 sel.sport_mask = htons(0xffff);
08de61be
SS		 2599
2600 /* set destination address info of selector */
47162c0b 2601 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
08de61be
SS		 2602 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2603 sel.prefixlen_d = sa->sadb_address_prefixlen;
2604 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2605 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2606 if (sel.dport)
582ee43d 2607 sel.dport_mask = htons(0xffff);
08de61be
SS		 2608
2609 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2610
2611 /* extract ipsecrequests */
2612 i = 0;
2613 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2614
2615 while (len > 0 && i < XFRM_MAX_DEPTH) {
2616 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2617 if (ret < 0) {
2618 err = ret;
2619 goto out;
2620 } else {
2621 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2622 len -= ret;
2623 i++;
2624 }
2625 }
2626
2627 if (!i || len > 0) {
2628 err = -EINVAL;
2629 goto out;
2630 }
2631
13c1d189 2632 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
bd122403 2633 kma ? &k : NULL, net, NULL, 0, NULL);
08de61be
SS		 2634
2635 out:
2636 return err;
2637}
2638#else
2639static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
7f6daa63 2640 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2641{
2642 return -ENOPROTOOPT;
2643}
2644#endif
2645
2646
4c93fbb0 2647static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2648{
07fb0f17 2649 struct net *net = sock_net(sk);
77d8d7a6 2650 unsigned int dir;
215a2dd3 2651 int err = 0, delete;
1da177e4
LT		 2652 struct sadb_x_policy *pol;
2653 struct xfrm_policy *xp;
26b15dad 2654 struct km_event c;
1da177e4
LT		 2655
2656 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2657 return -EINVAL;
2658
77d8d7a6
HX		 2659 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2660 if (dir >= XFRM_POLICY_MAX)
2661 return -EINVAL;
2662
215a2dd3 2663 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
4f47e8ab 2664 xp = xfrm_policy_byid(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN,
bd55775c 2665 dir, pol->sadb_x_policy_id, delete, &err);
1da177e4
LT		 2666 if (xp == NULL)
2667 return -ENOENT;
2668
215a2dd3 2669 if (delete) {
2e71029e 2670 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1da177e4 2671
215a2dd3
EP		 2672 if (err)
2673 goto out;
2674 c.seq = hdr->sadb_msg_seq;
15e47304 2675 c.portid = hdr->sadb_msg_pid;
bf08867f 2676 c.data.byid = 1;
f60f6b8f 2677 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2678 km_policy_notify(xp, dir, &c);
26b15dad 2679 } else {
77d8d7a6 2680 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2681 }
1da177e4 2682
215a2dd3 2683out:
1da177e4
LT		 2684 xfrm_pol_put(xp);
2685 return err;
2686}
2687
2688static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2689{
83321d6b 2690 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 2691 struct sk_buff *out_skb;
2692 struct sadb_msg *out_hdr;
55569ce2 2693 int err;
1da177e4 2694
83321d6b
TT		 2695 if (!pfkey_can_dump(&pfk->sk))
2696 return -ENOBUFS;
2697
1da177e4
LT		 2698 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2699 if (IS_ERR(out_skb))
2700 return PTR_ERR(out_skb);
2701
55569ce2 2702 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
7c80eb1c
JS		 2703 if (err < 0) {
2704 kfree_skb(out_skb);
55569ce2 2705 return err;
7c80eb1c 2706 }
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
9c90c9b3
MK		 2836 /* Non-zero return value of pfkey_broadcast() does not always signal
2837 * an error and even on an actual error we may still want to process
2838 * the message so rather ignore the return value.
2839 */
2840 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
2841 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
1da177e4
LT		 2842
2843 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2844 err = parse_exthdrs(skb, hdr, ext_hdrs);
2845 if (!err) {
2846 err = -EOPNOTSUPP;
2847 if (pfkey_funcs[hdr->sadb_msg_type])
2848 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2849 }
2850 return err;
2851}
2852
2853static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2854{
2855 struct sadb_msg *hdr = NULL;
2856
2857 if (skb->len < sizeof(*hdr)) {
2858 *errp = -EMSGSIZE;
2859 } else {
2860 hdr = (struct sadb_msg *) skb->data;
2861 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2862 hdr->sadb_msg_reserved != 0 ||
2863 (hdr->sadb_msg_type <= SADB_RESERVED ||
2864 hdr->sadb_msg_type > SADB_MAX)) {
2865 hdr = NULL;
2866 *errp = -EINVAL;
2867 } else if (hdr->sadb_msg_len != (skb->len /
2868 sizeof(uint64_t)) ||
2869 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2870 sizeof(uint64_t))) {
2871 hdr = NULL;
2872 *errp = -EMSGSIZE;
2873 } else {
2874 *errp = 0;
2875 }
2876 }
2877 return hdr;
2878}
2879
4c93fbb0
DM		 2880static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2881 const struct xfrm_algo_desc *d)
1da177e4 2882{
f398035f
HX		 2883 unsigned int id = d->desc.sadb_alg_id;
2884
2885 if (id >= sizeof(t->aalgos) * 8)
2886 return 0;
2887
2888 return (t->aalgos >> id) & 1;
1da177e4
LT		 2889}
2890
4c93fbb0
DM		 2891static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2892 const struct xfrm_algo_desc *d)
1da177e4 2893{
f398035f
HX		 2894 unsigned int id = d->desc.sadb_alg_id;
2895
2896 if (id >= sizeof(t->ealgos) * 8)
2897 return 0;
2898
2899 return (t->ealgos >> id) & 1;
1da177e4
LT		 2900}
2901
4c93fbb0 2902static int count_ah_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2903{
2904 int i, sz = 0;
2905
2906 for (i = 0; ; i++) {
4c93fbb0 2907 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2908 if (!aalg)
2909 break;
7e50f84c
JK		 2910 if (!aalg->pfkey_supported)
2911 continue;
7f57f816 2912 if (aalg_tmpl_set(t, aalg))
1da177e4
LT		 2913 sz += sizeof(struct sadb_comb);
2914 }
2915 return sz + sizeof(struct sadb_prop);
2916}
2917
4c93fbb0 2918static int count_esp_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2919{
2920 int i, k, sz = 0;
2921
2922 for (i = 0; ; i++) {
4c93fbb0 2923 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2924 if (!ealg)
2925 break;
8ff24541 2926
7e50f84c
JK		 2927 if (!ealg->pfkey_supported)
2928 continue;
2929
7f57f816 2930 if (!(ealg_tmpl_set(t, ealg)))
1da177e4 2931 continue;
8ff24541 2932
1da177e4 2933 for (k = 1; ; k++) {
4c93fbb0 2934 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2935 if (!aalg)
2936 break;
8ff24541 2937
7e50f84c
JK		 2938 if (!aalg->pfkey_supported)
2939 continue;
2940
7f57f816 2941 if (aalg_tmpl_set(t, aalg))
1da177e4
LT		 2942 sz += sizeof(struct sadb_comb);
2943 }
2944 }
2945 return sz + sizeof(struct sadb_prop);
2946}
2947
7f57f816 2948static int dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2949{
2950 struct sadb_prop *p;
7f57f816 2951 int sz = 0;
1da177e4
LT		 2952 int i;
2953
4df864c1 2954 p = skb_put(skb, sizeof(struct sadb_prop));
1da177e4
LT		 2955 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2956 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2957 p->sadb_prop_replay = 32;
2958 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2959
2960 for (i = 0; ; i++) {
4c93fbb0 2961 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2962 if (!aalg)
2963 break;
2964
7e50f84c
JK		 2965 if (!aalg->pfkey_supported)
2966 continue;
2967
1da177e4
LT		 2968 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2969 struct sadb_comb *c;
b080db58 2970 c = skb_put_zero(skb, sizeof(struct sadb_comb));
1da177e4
LT		 2971 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2972 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2973 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2974 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2975 c->sadb_comb_hard_addtime = 24*60*60;
2976 c->sadb_comb_soft_addtime = 20*60*60;
2977 c->sadb_comb_hard_usetime = 8*60*60;
2978 c->sadb_comb_soft_usetime = 7*60*60;
7f57f816 2979 sz += sizeof(*c);
1da177e4
LT		 2980 }
2981 }
7f57f816
HX		 2982
2983 return sz + sizeof(*p);
1da177e4
LT		 2984}
2985
7f57f816 2986static int dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2987{
2988 struct sadb_prop *p;
7f57f816 2989 int sz = 0;
1da177e4
LT		 2990 int i, k;
2991
4df864c1 2992 p = skb_put(skb, sizeof(struct sadb_prop));
1da177e4
LT		 2993 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2994 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2995 p->sadb_prop_replay = 32;
2996 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2997
2998 for (i=0; ; i++) {
4c93fbb0 2999 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 3000 if (!ealg)
3001 break;
8ff24541 3002
7e50f84c
JK		 3003 if (!ealg->pfkey_supported)
3004 continue;
3005
1da177e4
LT		 3006 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
3007 continue;
8ff24541 3008
1da177e4
LT		 3009 for (k = 1; ; k++) {
3010 struct sadb_comb *c;
4c93fbb0 3011 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 3012 if (!aalg)
3013 break;
7e50f84c
JK		 3014 if (!aalg->pfkey_supported)
3015 continue;
1da177e4
LT		 3016 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
3017 continue;
4df864c1 3018 c = skb_put(skb, sizeof(struct sadb_comb));
1da177e4
LT		 3019 memset(c, 0, sizeof(*c));
3020 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
3021 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
3022 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
3023 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
3024 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
3025 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3026 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3027 c->sadb_comb_hard_addtime = 24*60*60;
3028 c->sadb_comb_soft_addtime = 20*60*60;
3029 c->sadb_comb_hard_usetime = 8*60*60;
3030 c->sadb_comb_soft_usetime = 7*60*60;
7f57f816 3031 sz += sizeof(*c);
1da177e4
LT		 3032 }
3033 }
7f57f816
HX		 3034
3035 return sz + sizeof(*p);
1da177e4
LT		 3036}
3037
214e005b 3038static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
26b15dad
JHS		 3039{
3040 return 0;
3041}
3042
214e005b 3043static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 3044{
3045 struct sk_buff *out_skb;
3046 struct sadb_msg *out_hdr;
26b15dad
JHS		 3047 int hard;
3048 int hsc;
3049
bf08867f 3050 hard = c->data.hard;
26b15dad
JHS		 3051 if (hard)
3052 hsc = 2;
3053 else
3054 hsc = 1;
1da177e4 3055
050f009e 3056 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 3057 if (IS_ERR(out_skb))
3058 return PTR_ERR(out_skb);
3059
3060 out_hdr = (struct sadb_msg *) out_skb->data;
3061 out_hdr->sadb_msg_version = PF_KEY_V2;
3062 out_hdr->sadb_msg_type = SADB_EXPIRE;
3063 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3064 out_hdr->sadb_msg_errno = 0;
3065 out_hdr->sadb_msg_reserved = 0;
3066 out_hdr->sadb_msg_seq = 0;
3067 out_hdr->sadb_msg_pid = 0;
3068
36f41f8f
ED		 3069 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3070 xs_net(x));
1da177e4
LT		 3071 return 0;
3072}
3073
214e005b 3074static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad 3075{
07fb0f17 3076 struct net *net = x ? xs_net(x) : c->net;
3fa87a32
AD		 3077 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3078
3079 if (atomic_read(&net_pfkey->socks_nr) == 0)
99c6f60e
JHS		 3080 return 0;
3081
26b15dad 3082 switch (c->event) {
f60f6b8f 3083 case XFRM_MSG_EXPIRE:
26b15dad 3084 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 3085 case XFRM_MSG_DELSA:
3086 case XFRM_MSG_NEWSA:
3087 case XFRM_MSG_UPDSA:
26b15dad 3088 return key_notify_sa(x, c);
f60f6b8f 3089 case XFRM_MSG_FLUSHSA:
26b15dad 3090 return key_notify_sa_flush(c);
d51d081d
JHS		 3091 case XFRM_MSG_NEWAE: /* not yet supported */
3092 break;
26b15dad 3093 default:
207024b9 3094 pr_err("pfkey: Unknown SA event %d\n", c->event);
26b15dad
JHS		 3095 break;
3096 }
3097
3098 return 0;
3099}
3100
214e005b 3101static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 3102{
f7b6983f
MN		 3103 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3104 return 0;
3105
26b15dad 3106 switch (c->event) {
f60f6b8f 3107 case XFRM_MSG_POLEXPIRE:
26b15dad 3108 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 3109 case XFRM_MSG_DELPOLICY:
3110 case XFRM_MSG_NEWPOLICY:
3111 case XFRM_MSG_UPDPOLICY:
26b15dad 3112 return key_notify_policy(xp, dir, c);
f60f6b8f 3113 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 3114 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3115 break;
26b15dad
JHS		 3116 return key_notify_policy_flush(c);
3117 default:
207024b9 3118 pr_err("pfkey: Unknown policy event %d\n", c->event);
26b15dad
JHS		 3119 break;
3120 }
3121
3122 return 0;
3123}
3124
1da177e4
LT		 3125static u32 get_acqseq(void)
3126{
3127 u32 res;
28aecb9d 3128 static atomic_t acqseq;
1da177e4 3129
28aecb9d
ED		 3130 do {
3131 res = atomic_inc_return(&acqseq);
3132 } while (!res);
1da177e4
LT		 3133 return res;
3134}
3135
0f24558e
HG		 3136static bool pfkey_is_alive(const struct km_event *c)
3137{
3138 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3139 struct sock *sk;
3140 bool is_alive = false;
3141
3142 rcu_read_lock();
3143 sk_for_each_rcu(sk, &net_pfkey->table) {
3144 if (pfkey_sk(sk)->registered) {
3145 is_alive = true;
3146 break;
3147 }
3148 }
3149 rcu_read_unlock();
3150
3151 return is_alive;
3152}
3153
65e0736b 3154static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
1da177e4
LT		 3155{
3156 struct sk_buff *skb;
3157 struct sadb_msg *hdr;
3158 struct sadb_address *addr;
3159 struct sadb_x_policy *pol;
1da177e4
LT		 3160 int sockaddr_size;
3161 int size;
4e2ba18e
VY		 3162 struct sadb_x_sec_ctx *sec_ctx;
3163 struct xfrm_sec_ctx *xfrm_ctx;
3164 int ctx_size = 0;
7f57f816 3165 int alg_size = 0;
8ff24541 3166
1da177e4
LT		 3167 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3168 if (!sockaddr_size)
3169 return -EINVAL;
3170
3171 size = sizeof(struct sadb_msg) +
3172 (sizeof(struct sadb_address) * 2) +
3173 (sockaddr_size * 2) +
3174 sizeof(struct sadb_x_policy);
8ff24541 3175
1da177e4 3176 if (x->id.proto == IPPROTO_AH)
7f57f816 3177 alg_size = count_ah_combs(t);
1da177e4 3178 else if (x->id.proto == IPPROTO_ESP)
7f57f816 3179 alg_size = count_esp_combs(t);
1da177e4 3180
4e2ba18e
VY		 3181 if ((xfrm_ctx = x->security)) {
3182 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3183 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3184 }
3185
7f57f816 3186 skb = alloc_skb(size + alg_size + 16, GFP_ATOMIC);
1da177e4
LT		 3187 if (skb == NULL)
3188 return -ENOMEM;
8ff24541 3189
4df864c1 3190 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 3191 hdr->sadb_msg_version = PF_KEY_V2;
3192 hdr->sadb_msg_type = SADB_ACQUIRE;
3193 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3194 hdr->sadb_msg_len = size / sizeof(uint64_t);
3195 hdr->sadb_msg_errno = 0;
3196 hdr->sadb_msg_reserved = 0;
3197 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3198 hdr->sadb_msg_pid = 0;
3199
3200 /* src address */
4df864c1 3201 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 3202 addr->sadb_address_len =
1da177e4
LT		 3203 (sizeof(struct sadb_address)+sockaddr_size)/
3204 sizeof(uint64_t);
3205 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3206 addr->sadb_address_proto = 0;
3207 addr->sadb_address_reserved = 0;
e5b56652
YH		 3208 addr->sadb_address_prefixlen =
3209 pfkey_sockaddr_fill(&x->props.saddr, 0,
3210 (struct sockaddr *) (addr + 1),
3211 x->props.family);
3212 if (!addr->sadb_address_prefixlen)
1da177e4 3213 BUG();
8ff24541 3214
1da177e4 3215 /* dst address */
4df864c1 3216 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
1da177e4
LT		 3217 addr->sadb_address_len =
3218 (sizeof(struct sadb_address)+sockaddr_size)/
3219 sizeof(uint64_t);
3220 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3221 addr->sadb_address_proto = 0;
3222 addr->sadb_address_reserved = 0;
e5b56652
YH		 3223 addr->sadb_address_prefixlen =
3224 pfkey_sockaddr_fill(&x->id.daddr, 0,
3225 (struct sockaddr *) (addr + 1),
3226 x->props.family);
3227 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3228 BUG();
3229
4df864c1 3230 pol = skb_put(skb, sizeof(struct sadb_x_policy));
1da177e4
LT		 3231 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3232 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3233 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
65e0736b 3234 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
ff862a46 3235 pol->sadb_x_policy_reserved = 0;
1da177e4 3236 pol->sadb_x_policy_id = xp->index;
ff862a46 3237 pol->sadb_x_policy_priority = xp->priority;
1da177e4
LT		 3238
3239 /* Set sadb_comb's. */
7f57f816 3240 alg_size = 0;
1da177e4 3241 if (x->id.proto == IPPROTO_AH)
7f57f816 3242 alg_size = dump_ah_combs(skb, t);
1da177e4 3243 else if (x->id.proto == IPPROTO_ESP)
7f57f816
HX		 3244 alg_size = dump_esp_combs(skb, t);
3245
3246 hdr->sadb_msg_len += alg_size / 8;
1da177e4 3247
4e2ba18e
VY		 3248 /* security context */
3249 if (xfrm_ctx) {
4df864c1
JB		 3250 sec_ctx = skb_put(skb,
3251 sizeof(struct sadb_x_sec_ctx) + ctx_size);
4e2ba18e
VY		 3252 sec_ctx->sadb_x_sec_len =
3253 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3254 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3255 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3256 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3257 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3258 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3259 xfrm_ctx->ctx_len);
3260 }
3261
36f41f8f
ED		 3262 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3263 xs_net(x));
1da177e4
LT		 3264}
3265
cb969f07 3266static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3267 u8 *data, int len, int *dir)
1da177e4 3268{
07fb0f17 3269 struct net *net = sock_net(sk);
1da177e4
LT		 3270 struct xfrm_policy *xp;
3271 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3272 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3273
cb969f07 3274 switch (sk->sk_family) {
1da177e4
LT		 3275 case AF_INET:
3276 if (opt != IP_IPSEC_POLICY) {
3277 *dir = -EOPNOTSUPP;
3278 return NULL;
3279 }
3280 break;
dfd56b8b 3281#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 3282 case AF_INET6:
3283 if (opt != IPV6_IPSEC_POLICY) {
3284 *dir = -EOPNOTSUPP;
3285 return NULL;
3286 }
3287 break;
3288#endif
3289 default:
3290 *dir = -EINVAL;
3291 return NULL;
3292 }
3293
3294 *dir = -EINVAL;
3295
3296 if (len < sizeof(struct sadb_x_policy) ||
3297 pol->sadb_x_policy_len*8 > len ||
3298 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3299 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3300 return NULL;
3301
07fb0f17 3302 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3303 if (xp == NULL) {
3304 *dir = -ENOBUFS;
3305 return NULL;
3306 }
3307
3308 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3309 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3310
3311 xp->lft.soft_byte_limit = XFRM_INF;
3312 xp->lft.hard_byte_limit = XFRM_INF;
3313 xp->lft.soft_packet_limit = XFRM_INF;
3314 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3315 xp->family = sk->sk_family;
1da177e4
LT		 3316
3317 xp->xfrm_nr = 0;
3318 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3319 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3320 goto out;
3321
df71837d
TJ		 3322 /* security context too */
3323 if (len >= (pol->sadb_x_policy_len*8 +
3324 sizeof(struct sadb_x_sec_ctx))) {
3325 char *p = (char *)pol;
3326 struct xfrm_user_sec_ctx *uctx;
3327
3328 p += pol->sadb_x_policy_len*8;
3329 sec_ctx = (struct sadb_x_sec_ctx *)p;
3330 if (len < pol->sadb_x_policy_len*8 +
d90c9024 3331 sec_ctx->sadb_x_sec_len*8) {
cb969f07 3332 *dir = -EINVAL;
df71837d 3333 goto out;
cb969f07 3334 }
df71837d
TJ		 3335 if ((*dir = verify_sec_ctx_len(p)))
3336 goto out;
87536a81 3337 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
52a4c640 3338 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
df71837d
TJ		 3339 kfree(uctx);
3340
3341 if (*dir)
3342 goto out;
3343 }
3344
1da177e4
LT		 3345 *dir = pol->sadb_x_policy_dir-1;
3346 return xp;
3347
3348out:
70e90679 3349 xp->walk.dead = 1;
64c31b3f 3350 xfrm_policy_destroy(xp);
1da177e4
LT		 3351 return NULL;
3352}
3353
5d36b180 3354static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3355{
3356 struct sk_buff *skb;
3357 struct sadb_msg *hdr;
3358 struct sadb_sa *sa;
3359 struct sadb_address *addr;
3360 struct sadb_x_nat_t_port *n_port;
1da177e4
LT		 3361 int sockaddr_size;
3362 int size;
3363 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3364 struct xfrm_encap_tmpl *natt = NULL;
3365
3366 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3367 if (!sockaddr_size)
3368 return -EINVAL;
3369
3370 if (!satype)
3371 return -EINVAL;
3372
3373 if (!x->encap)
3374 return -EINVAL;
3375
3376 natt = x->encap;
3377
3378 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3379 *
3380 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3381 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3382 */
8ff24541 3383
1da177e4
LT		 3384 size = sizeof(struct sadb_msg) +
3385 sizeof(struct sadb_sa) +
3386 (sizeof(struct sadb_address) * 2) +
3387 (sockaddr_size * 2) +
3388 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3389
1da177e4
LT		 3390 skb = alloc_skb(size + 16, GFP_ATOMIC);
3391 if (skb == NULL)
3392 return -ENOMEM;
8ff24541 3393
4df864c1 3394 hdr = skb_put(skb, sizeof(struct sadb_msg));
1da177e4
LT		 3395 hdr->sadb_msg_version = PF_KEY_V2;
3396 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3397 hdr->sadb_msg_satype = satype;
3398 hdr->sadb_msg_len = size / sizeof(uint64_t);
3399 hdr->sadb_msg_errno = 0;
3400 hdr->sadb_msg_reserved = 0;
b97df039 3401 hdr->sadb_msg_seq = x->km.seq;
1da177e4
LT		 3402 hdr->sadb_msg_pid = 0;
3403
3404 /* SA */
4df864c1 3405 sa = skb_put(skb, sizeof(struct sadb_sa));
1da177e4
LT		 3406 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3407 sa->sadb_sa_exttype = SADB_EXT_SA;
3408 sa->sadb_sa_spi = x->id.spi;
3409 sa->sadb_sa_replay = 0;
3410 sa->sadb_sa_state = 0;
3411 sa->sadb_sa_auth = 0;
3412 sa->sadb_sa_encrypt = 0;
3413 sa->sadb_sa_flags = 0;
3414
3415 /* ADDRESS_SRC (old addr) */
4df864c1 3416 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 3417 addr->sadb_address_len =
1da177e4
LT		 3418 (sizeof(struct sadb_address)+sockaddr_size)/
3419 sizeof(uint64_t);
3420 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3421 addr->sadb_address_proto = 0;
3422 addr->sadb_address_reserved = 0;
e5b56652
YH		 3423 addr->sadb_address_prefixlen =
3424 pfkey_sockaddr_fill(&x->props.saddr, 0,
3425 (struct sockaddr *) (addr + 1),
3426 x->props.family);
3427 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3428 BUG();
3429
3430 /* NAT_T_SPORT (old port) */
4df864c1 3431 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 3432 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3433 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3434 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3435 n_port->sadb_x_nat_t_port_reserved = 0;
3436
3437 /* ADDRESS_DST (new addr) */
4df864c1 3438 addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
8ff24541 3439 addr->sadb_address_len =
1da177e4
LT		 3440 (sizeof(struct sadb_address)+sockaddr_size)/
3441 sizeof(uint64_t);
3442 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3443 addr->sadb_address_proto = 0;
3444 addr->sadb_address_reserved = 0;
e5b56652
YH		 3445 addr->sadb_address_prefixlen =
3446 pfkey_sockaddr_fill(ipaddr, 0,
3447 (struct sockaddr *) (addr + 1),
3448 x->props.family);
3449 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3450 BUG();
3451
3452 /* NAT_T_DPORT (new port) */
4df864c1 3453 n_port = skb_put(skb, sizeof(*n_port));
1da177e4
LT		 3454 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3455 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3456 n_port->sadb_x_nat_t_port_port = sport;
3457 n_port->sadb_x_nat_t_port_reserved = 0;
3458
36f41f8f
ED		 3459 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL,
3460 xs_net(x));
1da177e4
LT		 3461}
3462
08de61be
SS		 3463#ifdef CONFIG_NET_KEY_MIGRATE
3464static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
183cad12 3465 const struct xfrm_selector *sel)
08de61be
SS		 3466{
3467 struct sadb_address *addr;
4df864c1 3468 addr = skb_put(skb, sizeof(struct sadb_address) + sasize);
08de61be
SS		 3469 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3470 addr->sadb_address_exttype = type;
3471 addr->sadb_address_proto = sel->proto;
3472 addr->sadb_address_reserved = 0;
3473
3474 switch (type) {
3475 case SADB_EXT_ADDRESS_SRC:
e5b56652
YH		 3476 addr->sadb_address_prefixlen = sel->prefixlen_s;
3477 pfkey_sockaddr_fill(&sel->saddr, 0,
3478 (struct sockaddr *)(addr + 1),
3479 sel->family);
08de61be
SS		 3480 break;
3481 case SADB_EXT_ADDRESS_DST:
e5b56652
YH		 3482 addr->sadb_address_prefixlen = sel->prefixlen_d;
3483 pfkey_sockaddr_fill(&sel->daddr, 0,
3484 (struct sockaddr *)(addr + 1),
3485 sel->family);
08de61be
SS		 3486 break;
3487 default:
3488 return -EINVAL;
3489 }
3490
3491 return 0;
3492}
3493
13c1d189 3494
183cad12 3495static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
13c1d189
AE		 3496{
3497 struct sadb_x_kmaddress *kma;
3498 u8 *sa;
3499 int family = k->family;
3500 int socklen = pfkey_sockaddr_len(family);
3501 int size_req;
3502
3503 size_req = (sizeof(struct sadb_x_kmaddress) +
3504 pfkey_sockaddr_pair_size(family));
3505
b080db58 3506 kma = skb_put_zero(skb, size_req);
13c1d189
AE		 3507 kma->sadb_x_kmaddress_len = size_req / 8;
3508 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3509 kma->sadb_x_kmaddress_reserved = k->reserved;
3510
3511 sa = (u8 *)(kma + 1);
3512 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3513 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3514 return -EINVAL;
3515
3516 return 0;
3517}
3518
08de61be
SS		 3519static int set_ipsecrequest(struct sk_buff *skb,
3520 uint8_t proto, uint8_t mode, int level,
3521 uint32_t reqid, uint8_t family,
183cad12 3522 const xfrm_address_t *src, const xfrm_address_t *dst)
08de61be
SS		 3523{
3524 struct sadb_x_ipsecrequest *rq;
e5b56652
YH		 3525 u8 *sa;
3526 int socklen = pfkey_sockaddr_len(family);
08de61be
SS		 3527 int size_req;
3528
3529 size_req = sizeof(struct sadb_x_ipsecrequest) +
3530 pfkey_sockaddr_pair_size(family);
3531
b080db58 3532 rq = skb_put_zero(skb, size_req);
08de61be
SS		 3533 rq->sadb_x_ipsecrequest_len = size_req;
3534 rq->sadb_x_ipsecrequest_proto = proto;
3535 rq->sadb_x_ipsecrequest_mode = mode;
3536 rq->sadb_x_ipsecrequest_level = level;
3537 rq->sadb_x_ipsecrequest_reqid = reqid;
3538
e5b56652
YH		 3539 sa = (u8 *) (rq + 1);
3540 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3541 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
08de61be 3542 return -EINVAL;
08de61be
SS		 3543
3544 return 0;
3545}
3546#endif
3547
3548#ifdef CONFIG_NET_KEY_MIGRATE
183cad12
DM		 3549static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3550 const struct xfrm_migrate *m, int num_bundles,
8bafd730
AA		 3551 const struct xfrm_kmaddress *k,
3552 const struct xfrm_encap_tmpl *encap)
08de61be
SS		 3553{
3554 int i;
3555 int sasize_sel;
3556 int size = 0;
3557 int size_pol = 0;
3558 struct sk_buff *skb;
3559 struct sadb_msg *hdr;
3560 struct sadb_x_policy *pol;
183cad12 3561 const struct xfrm_migrate *mp;
08de61be
SS		 3562
3563 if (type != XFRM_POLICY_TYPE_MAIN)
3564 return 0;
3565
3566 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3567 return -EINVAL;
3568
13c1d189
AE		 3569 if (k != NULL) {
3570 /* addresses for KM */
3571 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3572 pfkey_sockaddr_pair_size(k->family));
3573 }
3574
08de61be
SS		 3575 /* selector */
3576 sasize_sel = pfkey_sockaddr_size(sel->family);
3577 if (!sasize_sel)
3578 return -EINVAL;
3579 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3580
3581 /* policy info */
3582 size_pol += sizeof(struct sadb_x_policy);
3583
3584 /* ipsecrequests */
3585 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3586 /* old locator pair */
3587 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3588 pfkey_sockaddr_pair_size(mp->old_family);
3589 /* new locator pair */
3590 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3591 pfkey_sockaddr_pair_size(mp->new_family);
3592 }
3593
3594 size += sizeof(struct sadb_msg) + size_pol;
3595
3596 /* alloc buffer */
3597 skb = alloc_skb(size, GFP_ATOMIC);
3598 if (skb == NULL)
3599 return -ENOMEM;
3600
4df864c1 3601 hdr = skb_put(skb, sizeof(struct sadb_msg));
08de61be
SS		 3602 hdr->sadb_msg_version = PF_KEY_V2;
3603 hdr->sadb_msg_type = SADB_X_MIGRATE;
3604 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3605 hdr->sadb_msg_len = size / 8;
3606 hdr->sadb_msg_errno = 0;
3607 hdr->sadb_msg_reserved = 0;
3608 hdr->sadb_msg_seq = 0;
3609 hdr->sadb_msg_pid = 0;
3610
13c1d189
AE		 3611 /* Addresses to be used by KM for negotiation, if ext is available */
3612 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
89eb06f1 3613 goto err;
13c1d189 3614
08de61be
SS		 3615 /* selector src */
3616 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3617
3618 /* selector dst */
3619 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3620
3621 /* policy information */
4df864c1 3622 pol = skb_put(skb, sizeof(struct sadb_x_policy));
08de61be
SS		 3623 pol->sadb_x_policy_len = size_pol / 8;
3624 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3625 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3626 pol->sadb_x_policy_dir = dir + 1;
ff862a46 3627 pol->sadb_x_policy_reserved = 0;
08de61be
SS		 3628 pol->sadb_x_policy_id = 0;
3629 pol->sadb_x_policy_priority = 0;
3630
3631 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3632 /* old ipsecrequest */
55569ce2
KM		 3633 int mode = pfkey_mode_from_xfrm(mp->mode);
3634 if (mode < 0)
d4782c32 3635 goto err;
55569ce2 3636 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3637 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3638 mp->reqid, mp->old_family,
d4782c32
PM		 3639 &mp->old_saddr, &mp->old_daddr) < 0)
3640 goto err;
08de61be
SS		 3641
3642 /* new ipsecrequest */
55569ce2 3643 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3644 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3645 mp->reqid, mp->new_family,
d4782c32
PM		 3646 &mp->new_saddr, &mp->new_daddr) < 0)
3647 goto err;
08de61be
SS		 3648 }
3649
3650 /* broadcast migrate message to sockets */
36f41f8f 3651 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
08de61be
SS		 3652
3653 return 0;
d4782c32
PM		 3654
3655err:
3656 kfree_skb(skb);
3657 return -EINVAL;
08de61be
SS		 3658}
3659#else
183cad12
DM		 3660static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3661 const struct xfrm_migrate *m, int num_bundles,
8bafd730
AA		 3662 const struct xfrm_kmaddress *k,
3663 const struct xfrm_encap_tmpl *encap)
08de61be
SS		 3664{
3665 return -ENOPROTOOPT;
3666}
3667#endif
3668
1b784140 3669static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4
LT		 3670{
3671 struct sock *sk = sock->sk;
3672 struct sk_buff *skb = NULL;
3673 struct sadb_msg *hdr = NULL;
3674 int err;
283bc9f3 3675 struct net *net = sock_net(sk);
1da177e4
LT		 3676
3677 err = -EOPNOTSUPP;
3678 if (msg->msg_flags & MSG_OOB)
3679 goto out;
3680
3681 err = -EMSGSIZE;
95c96174 3682 if ((unsigned int)len > sk->sk_sndbuf - 32)
1da177e4
LT		 3683 goto out;
3684
3685 err = -ENOBUFS;
3686 skb = alloc_skb(len, GFP_KERNEL);
3687 if (skb == NULL)
3688 goto out;
3689
3690 err = -EFAULT;
6ce8e9ce 3691 if (memcpy_from_msg(skb_put(skb,len), msg, len))
1da177e4
LT		 3692 goto out;
3693
3694 hdr = pfkey_get_base_msg(skb, &err);
3695 if (!hdr)
3696 goto out;
3697
283bc9f3 3698 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
1da177e4 3699 err = pfkey_process(sk, skb, hdr);
283bc9f3 3700 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 3701
3702out:
3703 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3704 err = 0;
6f961068 3705 kfree_skb(skb);
1da177e4
LT		 3706
3707 return err ? : len;
3708}
3709
1b784140 3710static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
1da177e4
LT		 3711 int flags)
3712{
3713 struct sock *sk = sock->sk;
83321d6b 3714 struct pfkey_sock *pfk = pfkey_sk(sk);
1da177e4
LT		 3715 struct sk_buff *skb;
3716 int copied, err;
3717
3718 err = -EINVAL;
3719 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3720 goto out;
3721
f4b41f06 3722 skb = skb_recv_datagram(sk, flags, &err);
1da177e4
LT		 3723 if (skb == NULL)
3724 goto out;
3725
3726 copied = skb->len;
3727 if (copied > len) {
3728 msg->msg_flags |= MSG_TRUNC;
3729 copied = len;
3730 }
3731
badff6d0 3732 skb_reset_transport_header(skb);
51f3d02b 3733 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4
LT		 3734 if (err)
3735 goto out_free;
3736
6fd1d51c 3737 sock_recv_cmsgs(msg, sk, skb);
1da177e4
LT		 3738
3739 err = (flags & MSG_TRUNC) ? skb->len : copied;
3740
83321d6b
TT		 3741 if (pfk->dump.dump != NULL &&
3742 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3743 pfkey_do_dump(pfk);
3744
1da177e4
LT		 3745out_free:
3746 skb_free_datagram(sk, skb);
3747out:
3748 return err;
3749}
3750
90ddc4f0 3751static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3752 .family = PF_KEY,
3753 .owner = THIS_MODULE,
3754 /* Operations that make no sense on pfkey sockets. */
3755 .bind = sock_no_bind,
3756 .connect = sock_no_connect,
3757 .socketpair = sock_no_socketpair,
3758 .accept = sock_no_accept,
3759 .getname = sock_no_getname,
3760 .ioctl = sock_no_ioctl,
3761 .listen = sock_no_listen,
3762 .shutdown = sock_no_shutdown,
1da177e4 3763 .mmap = sock_no_mmap,
1da177e4
LT		 3764
3765 /* Now the operations that really occur. */
3766 .release = pfkey_release,
a11e1d43 3767 .poll = datagram_poll,
1da177e4
LT		 3768 .sendmsg = pfkey_sendmsg,
3769 .recvmsg = pfkey_recvmsg,
3770};
3771
ec1b4cf7 3772static const struct net_proto_family pfkey_family_ops = {
1da177e4
LT		 3773 .family = PF_KEY,
3774 .create = pfkey_create,
3775 .owner = THIS_MODULE,
3776};
3777
3778#ifdef CONFIG_PROC_FS
bd2f7476 3779static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3780{
27b5b865 3781 struct sock *s = sk_entry(v);
1da177e4 3782
bd2f7476
PE		 3783 if (v == SEQ_START_TOKEN)
3784 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3785 else
71338aa7 3786 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4 3787 s,
41c6d650 3788 refcount_read(&s->sk_refcnt),
31e6d363
ED		 3789 sk_rmem_alloc_get(s),
3790 sk_wmem_alloc_get(s),
a7cb5a49 3791 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
1da177e4
LT		 3792 sock_i_ino(s)
3793 );
bd2f7476
PE		 3794 return 0;
3795}
3796
3797static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
ada440e3 3798 __acquires(rcu)
bd2f7476 3799{
7013ec30 3800 struct net *net = seq_file_net(f);
3fa87a32 3801 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 3802
7f6b9dbd 3803 rcu_read_lock();
3804 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
bd2f7476
PE		 3805}
3806
3807static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3808{
7013ec30 3809 struct net *net = seq_file_net(f);
3fa87a32
AD		 3810 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3811
7f6b9dbd 3812 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
bd2f7476 3813}
1da177e4 3814
bd2f7476 3815static void pfkey_seq_stop(struct seq_file *f, void *v)
ada440e3 3816 __releases(rcu)
bd2f7476 3817{
7f6b9dbd 3818 rcu_read_unlock();
bd2f7476 3819}
1da177e4 3820
98147d52 3821static const struct seq_operations pfkey_seq_ops = {
bd2f7476
PE		 3822 .start = pfkey_seq_start,
3823 .next = pfkey_seq_next,
3824 .stop = pfkey_seq_stop,
3825 .show = pfkey_seq_show,
3826};
1da177e4 3827
7013ec30 3828static int __net_init pfkey_init_proc(struct net *net)
61145aa1 3829{
bd2f7476
PE		 3830 struct proc_dir_entry *e;
3831
c3506372
CH		 3832 e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops,
3833 sizeof(struct seq_net_private));
bd2f7476 3834 if (e == NULL)
61145aa1 3835 return -ENOMEM;
bd2f7476 3836
bd2f7476 3837 return 0;
61145aa1
PE		 3838}
3839
2c8c1e72 3840static void __net_exit pfkey_exit_proc(struct net *net)
61145aa1 3841{
ece31ffd 3842 remove_proc_entry("pfkey", net->proc_net);
61145aa1
PE		 3843}
3844#else
2c8c1e72 3845static inline int pfkey_init_proc(struct net *net)
61145aa1
PE		 3846{
3847 return 0;
3848}
3849
2c8c1e72 3850static inline void pfkey_exit_proc(struct net *net)
61145aa1
PE		 3851{
3852}
1da177e4
LT		 3853#endif
3854
3855static struct xfrm_mgr pfkeyv2_mgr =
3856{
1da177e4
LT		 3857 .notify = pfkey_send_notify,
3858 .acquire = pfkey_send_acquire,
3859 .compile_policy = pfkey_compile_policy,
3860 .new_mapping = pfkey_send_new_mapping,
26b15dad 3861 .notify_policy = pfkey_send_policy_notify,
08de61be 3862 .migrate = pfkey_send_migrate,
0f24558e 3863 .is_alive = pfkey_is_alive,
1da177e4
LT		 3864};
3865
3fa87a32
AD		 3866static int __net_init pfkey_net_init(struct net *net)
3867{
23c049ca 3868 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3fa87a32
AD		 3869 int rv;
3870
3fa87a32
AD		 3871 INIT_HLIST_HEAD(&net_pfkey->table);
3872 atomic_set(&net_pfkey->socks_nr, 0);
23c049ca 3873
7013ec30 3874 rv = pfkey_init_proc(net);
3fa87a32 3875
3fa87a32
AD		 3876 return rv;
3877}
3878
3879static void __net_exit pfkey_net_exit(struct net *net)
3880{
3881 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3882
7013ec30 3883 pfkey_exit_proc(net);
663faeab 3884 WARN_ON(!hlist_empty(&net_pfkey->table));
3fa87a32
AD		 3885}
3886
3887static struct pernet_operations pfkey_net_ops = {
3888 .init = pfkey_net_init,
3889 .exit = pfkey_net_exit,
23c049ca
EB		 3890 .id = &pfkey_net_id,
3891 .size = sizeof(struct netns_pfkey),
3fa87a32
AD		 3892};
3893
1da177e4
LT		 3894static void __exit ipsec_pfkey_exit(void)
3895{
3896 xfrm_unregister_km(&pfkeyv2_mgr);
1da177e4 3897 sock_unregister(PF_KEY);
180211b8 3898 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3899 proto_unregister(&key_proto);
3900}
3901
3902static int __init ipsec_pfkey_init(void)
3903{
3904 int err = proto_register(&key_proto, 0);
3905
3906 if (err != 0)
3907 goto out;
3908
180211b8 3909 err = register_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3910 if (err != 0)
3911 goto out_unregister_key_proto;
180211b8
AD		 3912 err = sock_register(&pfkey_family_ops);
3913 if (err != 0)
3914 goto out_unregister_pernet;
f41b284a 3915 xfrm_register_km(&pfkeyv2_mgr);
1da177e4
LT		 3916out:
3917 return err;
180211b8 3918
180211b8
AD		 3919out_unregister_pernet:
3920 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3921out_unregister_key_proto:
3922 proto_unregister(&key_proto);
3923 goto out;
3924}
3925
3926module_init(ipsec_pfkey_init);
3927module_exit(ipsec_pfkey_exit);
6e2cf0eb 3928MODULE_DESCRIPTION("PF_KEY socket helpers");
1da177e4
LT		 3929MODULE_LICENSE("GPL");
3930MODULE_ALIAS_NETPROTO(PF_KEY);
Empty description
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