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xfrm: Oops on error in pfkey_msg2xfrm_state()
[mirror_ubuntu-artful-kernel.git] / net / key / af_key.c
CommitLineData
1da177e4
LT		 1/*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
4fc268d2 17#include <linux/capability.h>
1da177e4
LT		 18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/socket.h>
21#include <linux/pfkeyv2.h>
22#include <linux/ipsec.h>
23#include <linux/skbuff.h>
24#include <linux/rtnetlink.h>
25#include <linux/in.h>
26#include <linux/in6.h>
27#include <linux/proc_fs.h>
28#include <linux/init.h>
5a0e3ad6 29#include <linux/slab.h>
457c4cbc 30#include <net/net_namespace.h>
3fa87a32 31#include <net/netns/generic.h>
1da177e4
LT		 32#include <net/xfrm.h>
33
34#include <net/sock.h>
35
36#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
38
c7d03a00 39static unsigned int pfkey_net_id __read_mostly;
3fa87a32
AD		 40struct netns_pfkey {
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
43 atomic_t socks_nr;
44};
7f6b9dbd 45static DEFINE_MUTEX(pfkey_mutex);
1da177e4 46
bd55775c 47#define DUMMY_MARK 0
e473fcb4 48static const struct xfrm_mark dummy_mark = {0, 0};
1da177e4
LT		 49struct pfkey_sock {
50 /* struct sock must be the first member of struct pfkey_sock */
51 struct sock sk;
52 int registered;
53 int promisc;
83321d6b
TT		 54
55 struct {
56 uint8_t msg_version;
15e47304 57 uint32_t msg_portid;
83321d6b
TT		 58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
60 union {
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
63 } u;
12a169e7 64 struct sk_buff *skb;
83321d6b 65 } dump;
89e357d8 66 struct mutex dump_lock;
1da177e4
LT		 67};
68
096f41d3
HX		 69static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
70 xfrm_address_t *saddr, xfrm_address_t *daddr,
71 u16 *family);
72
1da177e4
LT		 73static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
74{
75 return (struct pfkey_sock *)sk;
76}
77
4c93fbb0 78static int pfkey_can_dump(const struct sock *sk)
83321d6b
TT		 79{
80 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
81 return 1;
82 return 0;
83}
84
05238204 85static void pfkey_terminate_dump(struct pfkey_sock *pfk)
83321d6b 86{
05238204 87 if (pfk->dump.dump) {
12a169e7
HX		 88 if (pfk->dump.skb) {
89 kfree_skb(pfk->dump.skb);
90 pfk->dump.skb = NULL;
91 }
05238204
TT		 92 pfk->dump.done(pfk);
93 pfk->dump.dump = NULL;
94 pfk->dump.done = NULL;
95 }
83321d6b
TT		 96}
97
1da177e4
LT		 98static void pfkey_sock_destruct(struct sock *sk)
99{
3fa87a32
AD		 100 struct net *net = sock_net(sk);
101 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
102
05238204 103 pfkey_terminate_dump(pfkey_sk(sk));
1da177e4
LT		 104 skb_queue_purge(&sk->sk_receive_queue);
105
106 if (!sock_flag(sk, SOCK_DEAD)) {
207024b9 107 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
1da177e4
LT		 108 return;
109 }
110
547b792c
IJ		 111 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
112 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
1da177e4 113
3fa87a32 114 atomic_dec(&net_pfkey->socks_nr);
1da177e4
LT		 115}
116
90ddc4f0 117static const struct proto_ops pfkey_ops;
1da177e4
LT		 118
119static void pfkey_insert(struct sock *sk)
120{
3fa87a32
AD		 121 struct net *net = sock_net(sk);
122 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
123
7f6b9dbd 124 mutex_lock(&pfkey_mutex);
125 sk_add_node_rcu(sk, &net_pfkey->table);
126 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 127}
128
129static void pfkey_remove(struct sock *sk)
130{
7f6b9dbd 131 mutex_lock(&pfkey_mutex);
132 sk_del_node_init_rcu(sk);
133 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 134}
135
136static struct proto key_proto = {
137 .name = "KEY",
138 .owner = THIS_MODULE,
139 .obj_size = sizeof(struct pfkey_sock),
140};
141
3f378b68
EP		 142static int pfkey_create(struct net *net, struct socket *sock, int protocol,
143 int kern)
1da177e4 144{
3fa87a32 145 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 146 struct sock *sk;
89e357d8 147 struct pfkey_sock *pfk;
1da177e4
LT		 148 int err;
149
df008c91 150 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 151 return -EPERM;
152 if (sock->type != SOCK_RAW)
153 return -ESOCKTNOSUPPORT;
154 if (protocol != PF_KEY_V2)
155 return -EPROTONOSUPPORT;
156
157 err = -ENOMEM;
11aa9c28 158 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
1da177e4
LT		 159 if (sk == NULL)
160 goto out;
8ff24541 161
89e357d8
YS		 162 pfk = pfkey_sk(sk);
163 mutex_init(&pfk->dump_lock);
164
1da177e4
LT		 165 sock->ops = &pfkey_ops;
166 sock_init_data(sock, sk);
167
168 sk->sk_family = PF_KEY;
169 sk->sk_destruct = pfkey_sock_destruct;
170
3fa87a32 171 atomic_inc(&net_pfkey->socks_nr);
1da177e4
LT		 172
173 pfkey_insert(sk);
174
175 return 0;
176out:
177 return err;
178}
179
180static int pfkey_release(struct socket *sock)
181{
182 struct sock *sk = sock->sk;
183
184 if (!sk)
185 return 0;
186
187 pfkey_remove(sk);
188
189 sock_orphan(sk);
190 sock->sk = NULL;
191 skb_queue_purge(&sk->sk_write_queue);
7f6b9dbd 192
193 synchronize_rcu();
1da177e4
LT		 194 sock_put(sk);
195
196 return 0;
197}
198
199static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
dd0fc66f 200 gfp_t allocation, struct sock *sk)
1da177e4
LT		 201{
202 int err = -ENOBUFS;
203
204 sock_hold(sk);
205 if (*skb2 == NULL) {
206 if (atomic_read(&skb->users) != 1) {
207 *skb2 = skb_clone(skb, allocation);
208 } else {
209 *skb2 = skb;
210 atomic_inc(&skb->users);
211 }
212 }
213 if (*skb2 != NULL) {
214 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
1da177e4
LT		 215 skb_set_owner_r(*skb2, sk);
216 skb_queue_tail(&sk->sk_receive_queue, *skb2);
676d2369 217 sk->sk_data_ready(sk);
1da177e4
LT		 218 *skb2 = NULL;
219 err = 0;
220 }
221 }
222 sock_put(sk);
223 return err;
224}
225
226/* Send SKB to all pfkey sockets matching selected criteria. */
227#define BROADCAST_ALL 0
228#define BROADCAST_ONE 1
229#define BROADCAST_REGISTERED 2
230#define BROADCAST_PROMISC_ONLY 4
ba51b6be 231static int pfkey_broadcast(struct sk_buff *skb,
07fb0f17
AD		 232 int broadcast_flags, struct sock *one_sk,
233 struct net *net)
1da177e4 234{
3fa87a32 235 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 236 struct sock *sk;
1da177e4
LT		 237 struct sk_buff *skb2 = NULL;
238 int err = -ESRCH;
239
240 /* XXX Do we need something like netlink_overrun? I think
241 * XXX PF_KEY socket apps will not mind current behavior.
242 */
243 if (!skb)
244 return -ENOMEM;
245
7f6b9dbd 246 rcu_read_lock();
b67bfe0d 247 sk_for_each_rcu(sk, &net_pfkey->table) {
1da177e4
LT		 248 struct pfkey_sock *pfk = pfkey_sk(sk);
249 int err2;
250
251 /* Yes, it means that if you are meant to receive this
252 * pfkey message you receive it twice as promiscuous
253 * socket.
254 */
255 if (pfk->promisc)
ba51b6be 256 pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
1da177e4
LT		 257
258 /* the exact target will be processed later */
259 if (sk == one_sk)
260 continue;
261 if (broadcast_flags != BROADCAST_ALL) {
262 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
263 continue;
264 if ((broadcast_flags & BROADCAST_REGISTERED) &&
265 !pfk->registered)
266 continue;
267 if (broadcast_flags & BROADCAST_ONE)
268 continue;
269 }
270
ba51b6be 271 err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk);
1da177e4 272
f6b8dec9 273 /* Error is cleared after successful sending to at least one
1da177e4
LT		 274 * registered KM */
275 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
276 err = err2;
277 }
7f6b9dbd 278 rcu_read_unlock();
1da177e4
LT		 279
280 if (one_sk != NULL)
ba51b6be 281 err = pfkey_broadcast_one(skb, &skb2, GFP_KERNEL, one_sk);
1da177e4 282
6f961068 283 kfree_skb(skb2);
1da177e4
LT		 284 kfree_skb(skb);
285 return err;
286}
287
05238204
TT		 288static int pfkey_do_dump(struct pfkey_sock *pfk)
289{
12a169e7 290 struct sadb_msg *hdr;
05238204
TT		 291 int rc;
292
89e357d8
YS		 293 mutex_lock(&pfk->dump_lock);
294 if (!pfk->dump.dump) {
295 rc = 0;
296 goto out;
297 }
298
05238204 299 rc = pfk->dump.dump(pfk);
89e357d8
YS		 300 if (rc == -ENOBUFS) {
301 rc = 0;
302 goto out;
303 }
05238204 304
12a169e7 305 if (pfk->dump.skb) {
89e357d8
YS		 306 if (!pfkey_can_dump(&pfk->sk)) {
307 rc = 0;
308 goto out;
309 }
12a169e7
HX		 310
311 hdr = (struct sadb_msg *) pfk->dump.skb->data;
312 hdr->sadb_msg_seq = 0;
313 hdr->sadb_msg_errno = rc;
ba51b6be 314 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
07fb0f17 315 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 316 pfk->dump.skb = NULL;
317 }
318
05238204 319 pfkey_terminate_dump(pfk);
89e357d8
YS		 320
321out:
322 mutex_unlock(&pfk->dump_lock);
05238204
TT		 323 return rc;
324}
325
4c93fbb0
DM		 326static inline void pfkey_hdr_dup(struct sadb_msg *new,
327 const struct sadb_msg *orig)
1da177e4
LT		 328{
329 *new = *orig;
330}
331
4c93fbb0 332static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
1da177e4
LT		 333{
334 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
335 struct sadb_msg *hdr;
336
337 if (!skb)
338 return -ENOBUFS;
339
340 /* Woe be to the platform trying to support PFKEY yet
341 * having normal errnos outside the 1-255 range, inclusive.
342 */
343 err = -err;
344 if (err == ERESTARTSYS ||
345 err == ERESTARTNOHAND ||
346 err == ERESTARTNOINTR)
347 err = EINTR;
348 if (err >= 512)
349 err = EINVAL;
09a62660 350 BUG_ON(err <= 0 || err >= 256);
1da177e4
LT		 351
352 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
353 pfkey_hdr_dup(hdr, orig);
354 hdr->sadb_msg_errno = (uint8_t) err;
355 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
356 sizeof(uint64_t));
357
ba51b6be 358 pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 359
360 return 0;
361}
362
8603b955 363static const u8 sadb_ext_min_len[] = {
1da177e4
LT		 364 [SADB_EXT_RESERVED] = (u8) 0,
365 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
366 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
367 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
368 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
369 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
370 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
371 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
372 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
373 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
374 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
375 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
376 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
377 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
378 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
379 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
380 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
381 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
382 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
383 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
384 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
385 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
386 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
387 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
df71837d 388 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
13c1d189 389 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
d2c5f658 390 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
1da177e4
LT		 391};
392
393/* Verify sadb_address_{len,prefixlen} against sa_family. */
4c93fbb0 394static int verify_address_len(const void *p)
1da177e4 395{
4c93fbb0
DM		 396 const struct sadb_address *sp = p;
397 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
398 const struct sockaddr_in *sin;
dfd56b8b 399#if IS_ENABLED(CONFIG_IPV6)
4c93fbb0 400 const struct sockaddr_in6 *sin6;
1da177e4
LT		 401#endif
402 int len;
403
404 switch (addr->sa_family) {
405 case AF_INET:
356f89e1 406 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
1da177e4
LT		 407 if (sp->sadb_address_len != len ||
408 sp->sadb_address_prefixlen > 32)
409 return -EINVAL;
410 break;
dfd56b8b 411#if IS_ENABLED(CONFIG_IPV6)
1da177e4 412 case AF_INET6:
356f89e1 413 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
1da177e4
LT		 414 if (sp->sadb_address_len != len ||
415 sp->sadb_address_prefixlen > 128)
416 return -EINVAL;
417 break;
418#endif
419 default:
420 /* It is user using kernel to keep track of security
421 * associations for another protocol, such as
422 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
423 * lengths.
424 *
425 * XXX Actually, association/policy database is not yet
426 * XXX able to cope with arbitrary sockaddr families.
427 * XXX When it can, remove this -EINVAL. -DaveM
428 */
429 return -EINVAL;
3ff50b79 430 }
1da177e4
LT		 431
432 return 0;
433}
434
4c93fbb0 435static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
df71837d 436{
356f89e1
IJ		 437 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
438 sec_ctx->sadb_x_ctx_len,
439 sizeof(uint64_t));
df71837d
TJ		 440}
441
4c93fbb0 442static inline int verify_sec_ctx_len(const void *p)
df71837d 443{
4c93fbb0 444 const struct sadb_x_sec_ctx *sec_ctx = p;
298bb621 445 int len = sec_ctx->sadb_x_ctx_len;
df71837d 446
298bb621 447 if (len > PAGE_SIZE)
df71837d
TJ		 448 return -EINVAL;
449
450 len = pfkey_sec_ctx_len(sec_ctx);
451
452 if (sec_ctx->sadb_x_sec_len != len)
453 return -EINVAL;
454
455 return 0;
456}
457
87536a81
NA		 458static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
459 gfp_t gfp)
df71837d
TJ		 460{
461 struct xfrm_user_sec_ctx *uctx = NULL;
462 int ctx_size = sec_ctx->sadb_x_ctx_len;
463
87536a81 464 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
df71837d
TJ		 465
466 if (!uctx)
467 return NULL;
468
469 uctx->len = pfkey_sec_ctx_len(sec_ctx);
470 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
471 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
472 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
473 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
474 memcpy(uctx + 1, sec_ctx + 1,
475 uctx->ctx_len);
476
477 return uctx;
478}
479
4c93fbb0
DM		 480static int present_and_same_family(const struct sadb_address *src,
481 const struct sadb_address *dst)
1da177e4 482{
4c93fbb0 483 const struct sockaddr *s_addr, *d_addr;
1da177e4
LT		 484
485 if (!src || !dst)
486 return 0;
487
4c93fbb0
DM		 488 s_addr = (const struct sockaddr *)(src + 1);
489 d_addr = (const struct sockaddr *)(dst + 1);
1da177e4
LT		 490 if (s_addr->sa_family != d_addr->sa_family)
491 return 0;
492 if (s_addr->sa_family != AF_INET
dfd56b8b 493#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 494 && s_addr->sa_family != AF_INET6
495#endif
496 )
497 return 0;
498
499 return 1;
500}
501
4c93fbb0 502static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
1da177e4 503{
4c93fbb0 504 const char *p = (char *) hdr;
1da177e4
LT		 505 int len = skb->len;
506
507 len -= sizeof(*hdr);
508 p += sizeof(*hdr);
509 while (len > 0) {
4c93fbb0 510 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
1da177e4
LT		 511 uint16_t ext_type;
512 int ext_len;
513
514 ext_len = ehdr->sadb_ext_len;
515 ext_len *= sizeof(uint64_t);
516 ext_type = ehdr->sadb_ext_type;
517 if (ext_len < sizeof(uint64_t) ||
518 ext_len > len ||
519 ext_type == SADB_EXT_RESERVED)
520 return -EINVAL;
521
522 if (ext_type <= SADB_EXT_MAX) {
523 int min = (int) sadb_ext_min_len[ext_type];
524 if (ext_len < min)
525 return -EINVAL;
526 if (ext_hdrs[ext_type-1] != NULL)
527 return -EINVAL;
528 if (ext_type == SADB_EXT_ADDRESS_SRC ||
529 ext_type == SADB_EXT_ADDRESS_DST ||
530 ext_type == SADB_EXT_ADDRESS_PROXY ||
531 ext_type == SADB_X_EXT_NAT_T_OA) {
532 if (verify_address_len(p))
533 return -EINVAL;
8ff24541 534 }
df71837d
TJ		 535 if (ext_type == SADB_X_EXT_SEC_CTX) {
536 if (verify_sec_ctx_len(p))
537 return -EINVAL;
538 }
4c93fbb0 539 ext_hdrs[ext_type-1] = (void *) p;
1da177e4
LT		 540 }
541 p += ext_len;
542 len -= ext_len;
543 }
544
545 return 0;
546}
547
548static uint16_t
549pfkey_satype2proto(uint8_t satype)
550{
551 switch (satype) {
552 case SADB_SATYPE_UNSPEC:
553 return IPSEC_PROTO_ANY;
554 case SADB_SATYPE_AH:
555 return IPPROTO_AH;
556 case SADB_SATYPE_ESP:
557 return IPPROTO_ESP;
558 case SADB_X_SATYPE_IPCOMP:
559 return IPPROTO_COMP;
1da177e4
LT		 560 default:
561 return 0;
562 }
563 /* NOTREACHED */
564}
565
566static uint8_t
567pfkey_proto2satype(uint16_t proto)
568{
569 switch (proto) {
570 case IPPROTO_AH:
571 return SADB_SATYPE_AH;
572 case IPPROTO_ESP:
573 return SADB_SATYPE_ESP;
574 case IPPROTO_COMP:
575 return SADB_X_SATYPE_IPCOMP;
1da177e4
LT		 576 default:
577 return 0;
578 }
579 /* NOTREACHED */
580}
581
582/* BTW, this scheme means that there is no way with PFKEY2 sockets to
583 * say specifically 'just raw sockets' as we encode them as 255.
584 */
585
586static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
587{
a02cec21 588 return proto == IPSEC_PROTO_ANY ? 0 : proto;
1da177e4
LT		 589}
590
591static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
592{
a02cec21 593 return proto ? proto : IPSEC_PROTO_ANY;
1da177e4
LT		 594}
595
9e8b4ed8
YH		 596static inline int pfkey_sockaddr_len(sa_family_t family)
597{
598 switch (family) {
599 case AF_INET:
600 return sizeof(struct sockaddr_in);
dfd56b8b 601#if IS_ENABLED(CONFIG_IPV6)
9e8b4ed8
YH		 602 case AF_INET6:
603 return sizeof(struct sockaddr_in6);
604#endif
605 }
606 return 0;
607}
608
5f95ac91
YH		 609static
610int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
1da177e4 611{
5f95ac91 612 switch (sa->sa_family) {
1da177e4 613 case AF_INET:
8ff24541 614 xaddr->a4 =
5f95ac91 615 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
1da177e4 616 return AF_INET;
dfd56b8b 617#if IS_ENABLED(CONFIG_IPV6)
1da177e4 618 case AF_INET6:
8ff24541 619 memcpy(xaddr->a6,
5f95ac91 620 &((struct sockaddr_in6 *)sa)->sin6_addr,
1da177e4
LT		 621 sizeof(struct in6_addr));
622 return AF_INET6;
623#endif
1da177e4 624 }
5f95ac91
YH		 625 return 0;
626}
627
628static
4c93fbb0 629int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
5f95ac91
YH		 630{
631 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
632 xaddr);
1da177e4
LT		 633}
634
4c93fbb0 635static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 636{
4c93fbb0
DM		 637 const struct sadb_sa *sa;
638 const struct sadb_address *addr;
1da177e4
LT		 639 uint16_t proto;
640 unsigned short family;
641 xfrm_address_t *xaddr;
642
ea110733 643 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 644 if (sa == NULL)
645 return NULL;
646
647 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
648 if (proto == 0)
649 return NULL;
650
651 /* sadb_address_len should be checked by caller */
ea110733 652 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
1da177e4
LT		 653 if (addr == NULL)
654 return NULL;
655
4c93fbb0 656 family = ((const struct sockaddr *)(addr + 1))->sa_family;
1da177e4
LT		 657 switch (family) {
658 case AF_INET:
4c93fbb0 659 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
1da177e4 660 break;
dfd56b8b 661#if IS_ENABLED(CONFIG_IPV6)
1da177e4 662 case AF_INET6:
4c93fbb0 663 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
1da177e4
LT		 664 break;
665#endif
666 default:
667 xaddr = NULL;
668 }
669
670 if (!xaddr)
671 return NULL;
672
bd55775c 673 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
1da177e4
LT		 674}
675
676#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
9e8b4ed8 677
1da177e4
LT		 678static int
679pfkey_sockaddr_size(sa_family_t family)
680{
9e8b4ed8 681 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
1da177e4
LT		 682}
683
55569ce2
KM		 684static inline int pfkey_mode_from_xfrm(int mode)
685{
686 switch(mode) {
687 case XFRM_MODE_TRANSPORT:
688 return IPSEC_MODE_TRANSPORT;
689 case XFRM_MODE_TUNNEL:
690 return IPSEC_MODE_TUNNEL;
691 case XFRM_MODE_BEET:
692 return IPSEC_MODE_BEET;
693 default:
694 return -1;
695 }
696}
697
698static inline int pfkey_mode_to_xfrm(int mode)
699{
700 switch(mode) {
701 case IPSEC_MODE_ANY: /*XXX*/
702 case IPSEC_MODE_TRANSPORT:
703 return XFRM_MODE_TRANSPORT;
704 case IPSEC_MODE_TUNNEL:
705 return XFRM_MODE_TUNNEL;
706 case IPSEC_MODE_BEET:
707 return XFRM_MODE_BEET;
708 default:
709 return -1;
710 }
711}
712
183cad12 713static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
4c93fbb0
DM		 714 struct sockaddr *sa,
715 unsigned short family)
e5b56652
YH		 716{
717 switch (family) {
718 case AF_INET:
719 {
720 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
721 sin->sin_family = AF_INET;
722 sin->sin_port = port;
723 sin->sin_addr.s_addr = xaddr->a4;
724 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
725 return 32;
726 }
dfd56b8b 727#if IS_ENABLED(CONFIG_IPV6)
e5b56652
YH		 728 case AF_INET6:
729 {
730 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
731 sin6->sin6_family = AF_INET6;
732 sin6->sin6_port = port;
733 sin6->sin6_flowinfo = 0;
15e318bd 734 sin6->sin6_addr = xaddr->in6;
e5b56652
YH		 735 sin6->sin6_scope_id = 0;
736 return 128;
737 }
738#endif
739 }
740 return 0;
741}
742
4c93fbb0 743static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
050f009e 744 int add_keys, int hsc)
1da177e4
LT		 745{
746 struct sk_buff *skb;
747 struct sadb_msg *hdr;
748 struct sadb_sa *sa;
749 struct sadb_lifetime *lifetime;
750 struct sadb_address *addr;
751 struct sadb_key *key;
752 struct sadb_x_sa2 *sa2;
df71837d
TJ		 753 struct sadb_x_sec_ctx *sec_ctx;
754 struct xfrm_sec_ctx *xfrm_ctx;
755 int ctx_size = 0;
1da177e4
LT		 756 int size;
757 int auth_key_size = 0;
758 int encrypt_key_size = 0;
759 int sockaddr_size;
760 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 761 int mode;
1da177e4
LT		 762
763 /* address family check */
764 sockaddr_size = pfkey_sockaddr_size(x->props.family);
765 if (!sockaddr_size)
766 return ERR_PTR(-EINVAL);
767
768 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
769 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 770 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 771 sizeof(struct sadb_lifetime) +
772 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
773 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 774 sizeof(struct sadb_address)*2 +
1da177e4
LT		 775 sockaddr_size*2 +
776 sizeof(struct sadb_x_sa2);
df71837d
TJ		 777
778 if ((xfrm_ctx = x->security)) {
779 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
780 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
781 }
782
1da177e4 783 /* identity & sensitivity */
70e94e66 784 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
1da177e4
LT		 785 size += sizeof(struct sadb_address) + sockaddr_size;
786
787 if (add_keys) {
788 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 789 auth_key_size =
790 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 791 size += sizeof(struct sadb_key) + auth_key_size;
792 }
793 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 794 encrypt_key_size =
795 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 796 size += sizeof(struct sadb_key) + encrypt_key_size;
797 }
798 }
799 if (x->encap)
800 natt = x->encap;
801
802 if (natt && natt->encap_type) {
803 size += sizeof(struct sadb_x_nat_t_type);
804 size += sizeof(struct sadb_x_nat_t_port);
805 size += sizeof(struct sadb_x_nat_t_port);
806 }
807
808 skb = alloc_skb(size + 16, GFP_ATOMIC);
809 if (skb == NULL)
810 return ERR_PTR(-ENOBUFS);
811
812 /* call should fill header later */
813 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
814 memset(hdr, 0, size); /* XXX do we need this ? */
815 hdr->sadb_msg_len = size / sizeof(uint64_t);
816
817 /* sa */
818 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
819 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
820 sa->sadb_sa_exttype = SADB_EXT_SA;
821 sa->sadb_sa_spi = x->id.spi;
822 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 823 switch (x->km.state) {
824 case XFRM_STATE_VALID:
825 sa->sadb_sa_state = x->km.dying ?
826 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
827 break;
828 case XFRM_STATE_ACQ:
1da177e4 829 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 830 break;
831 default:
1da177e4 832 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 833 break;
834 }
1da177e4
LT		 835 sa->sadb_sa_auth = 0;
836 if (x->aalg) {
837 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
7e50f84c
JK		 838 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
839 a->desc.sadb_alg_id : 0;
1da177e4
LT		 840 }
841 sa->sadb_sa_encrypt = 0;
842 BUG_ON(x->ealg && x->calg);
843 if (x->ealg) {
844 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
7e50f84c
JK		 845 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
846 a->desc.sadb_alg_id : 0;
1da177e4
LT		 847 }
848 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
849 if (x->calg) {
850 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
7e50f84c
JK		 851 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
852 a->desc.sadb_alg_id : 0;
1da177e4
LT		 853 }
854
855 sa->sadb_sa_flags = 0;
856 if (x->props.flags & XFRM_STATE_NOECN)
857 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
858 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
859 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 860 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
861 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 862
863 /* hard time */
864 if (hsc & 2) {
8ff24541 865 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 866 sizeof(struct sadb_lifetime));
867 lifetime->sadb_lifetime_len =
868 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
869 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
870 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
871 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
872 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
873 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
874 }
875 /* soft time */
876 if (hsc & 1) {
8ff24541 877 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 878 sizeof(struct sadb_lifetime));
879 lifetime->sadb_lifetime_len =
880 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
881 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
882 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
883 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
884 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
885 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
886 }
887 /* current time */
888 lifetime = (struct sadb_lifetime *) skb_put(skb,
889 sizeof(struct sadb_lifetime));
890 lifetime->sadb_lifetime_len =
891 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
892 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
893 lifetime->sadb_lifetime_allocations = x->curlft.packets;
894 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
895 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
896 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
897 /* src address */
8ff24541 898 addr = (struct sadb_address*) skb_put(skb,
1da177e4 899 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 900 addr->sadb_address_len =
1da177e4
LT		 901 (sizeof(struct sadb_address)+sockaddr_size)/
902 sizeof(uint64_t);
903 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 904 /* "if the ports are non-zero, then the sadb_address_proto field,
905 normally zero, MUST be filled in with the transport
1da177e4 906 protocol's number." - RFC2367 */
8ff24541 907 addr->sadb_address_proto = 0;
1da177e4 908 addr->sadb_address_reserved = 0;
1da177e4 909
e5b56652
YH		 910 addr->sadb_address_prefixlen =
911 pfkey_sockaddr_fill(&x->props.saddr, 0,
912 (struct sockaddr *) (addr + 1),
913 x->props.family);
914 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 915 BUG();
916
917 /* dst address */
8ff24541 918 addr = (struct sadb_address*) skb_put(skb,
1da177e4 919 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 920 addr->sadb_address_len =
1da177e4
LT		 921 (sizeof(struct sadb_address)+sockaddr_size)/
922 sizeof(uint64_t);
923 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
8ff24541 924 addr->sadb_address_proto = 0;
1da177e4 925 addr->sadb_address_reserved = 0;
1da177e4 926
e5b56652
YH		 927 addr->sadb_address_prefixlen =
928 pfkey_sockaddr_fill(&x->id.daddr, 0,
929 (struct sockaddr *) (addr + 1),
930 x->props.family);
931 if (!addr->sadb_address_prefixlen)
932 BUG();
1da177e4 933
70e94e66
YH		 934 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
935 x->props.family)) {
e5b56652
YH		 936 addr = (struct sadb_address*) skb_put(skb,
937 sizeof(struct sadb_address)+sockaddr_size);
938 addr->sadb_address_len =
939 (sizeof(struct sadb_address)+sockaddr_size)/
940 sizeof(uint64_t);
941 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
942 addr->sadb_address_proto =
943 pfkey_proto_from_xfrm(x->sel.proto);
944 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
945 addr->sadb_address_reserved = 0;
1da177e4 946
e5b56652
YH		 947 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
948 (struct sockaddr *) (addr + 1),
949 x->props.family);
1da177e4 950 }
1da177e4
LT		 951
952 /* auth key */
953 if (add_keys && auth_key_size) {
8ff24541 954 key = (struct sadb_key *) skb_put(skb,
1da177e4
LT		 955 sizeof(struct sadb_key)+auth_key_size);
956 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
957 sizeof(uint64_t);
958 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
959 key->sadb_key_bits = x->aalg->alg_key_len;
960 key->sadb_key_reserved = 0;
961 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
962 }
963 /* encrypt key */
964 if (add_keys && encrypt_key_size) {
8ff24541 965 key = (struct sadb_key *) skb_put(skb,
1da177e4 966 sizeof(struct sadb_key)+encrypt_key_size);
8ff24541 967 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 968 encrypt_key_size) / sizeof(uint64_t);
969 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
970 key->sadb_key_bits = x->ealg->alg_key_len;
971 key->sadb_key_reserved = 0;
8ff24541 972 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 973 (x->ealg->alg_key_len+7)/8);
974 }
975
976 /* sa */
977 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
978 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
979 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 980 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
981 kfree_skb(skb);
982 return ERR_PTR(-EINVAL);
983 }
984 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 985 sa2->sadb_x_sa2_reserved1 = 0;
986 sa2->sadb_x_sa2_reserved2 = 0;
987 sa2->sadb_x_sa2_sequence = 0;
988 sa2->sadb_x_sa2_reqid = x->props.reqid;
989
990 if (natt && natt->encap_type) {
991 struct sadb_x_nat_t_type *n_type;
992 struct sadb_x_nat_t_port *n_port;
993
994 /* type */
995 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
996 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
997 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
998 n_type->sadb_x_nat_t_type_type = natt->encap_type;
999 n_type->sadb_x_nat_t_type_reserved[0] = 0;
1000 n_type->sadb_x_nat_t_type_reserved[1] = 0;
1001 n_type->sadb_x_nat_t_type_reserved[2] = 0;
1002
1003 /* source port */
1004 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1005 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1006 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
1007 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
1008 n_port->sadb_x_nat_t_port_reserved = 0;
1009
1010 /* dest port */
1011 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
1012 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
1013 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
1014 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
1015 n_port->sadb_x_nat_t_port_reserved = 0;
1016 }
1017
df71837d
TJ		 1018 /* security context */
1019 if (xfrm_ctx) {
1020 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1021 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1022 sec_ctx->sadb_x_sec_len =
1023 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1024 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1025 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1026 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1027 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1028 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1029 xfrm_ctx->ctx_len);
1030 }
1031
1da177e4
LT		 1032 return skb;
1033}
1034
050f009e 1035
4c93fbb0 1036static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
050f009e
HX		 1037{
1038 struct sk_buff *skb;
1039
050f009e 1040 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1041
1042 return skb;
1043}
1044
4c93fbb0 1045static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
050f009e
HX		 1046 int hsc)
1047{
1048 return __pfkey_xfrm_state2msg(x, 0, hsc);
1049}
1050
07fb0f17 1051static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
4c93fbb0
DM		 1052 const struct sadb_msg *hdr,
1053 void * const *ext_hdrs)
1da177e4 1054{
8ff24541 1055 struct xfrm_state *x;
4c93fbb0
DM		 1056 const struct sadb_lifetime *lifetime;
1057 const struct sadb_sa *sa;
1058 const struct sadb_key *key;
1059 const struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1060 uint16_t proto;
1061 int err;
8ff24541 1062
1da177e4 1063
ea110733 1064 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 1065 if (!sa ||
1066 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1067 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1068 return ERR_PTR(-EINVAL);
1069 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1070 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1071 return ERR_PTR(-EINVAL);
1072 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1073 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1074 return ERR_PTR(-EINVAL);
1075 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1076 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1077 return ERR_PTR(-EINVAL);
1078
1079 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1080 if (proto == 0)
1081 return ERR_PTR(-EINVAL);
1082
1083 /* default error is no buffer space */
1084 err = -ENOBUFS;
1085
1086 /* RFC2367:
1087
1088 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1089 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1090 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1091 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1092 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1093 not true.
1094
8ff24541 1095 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1096 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1097 */
1098 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1099 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1100 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1101 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1102 return ERR_PTR(-EINVAL);
ea110733 1103 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1104 if (key != NULL &&
1105 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1106 ((key->sadb_key_bits+7) / 8 == 0 ||
1107 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1108 return ERR_PTR(-EINVAL);
1109 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1110 if (key != NULL &&
1111 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1112 ((key->sadb_key_bits+7) / 8 == 0 ||
1113 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1114 return ERR_PTR(-EINVAL);
1115
07fb0f17 1116 x = xfrm_state_alloc(net);
1da177e4
LT		 1117 if (x == NULL)
1118 return ERR_PTR(-ENOBUFS);
1119
1120 x->id.proto = proto;
1121 x->id.spi = sa->sadb_sa_spi;
33fce60d
FD		 1122 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1123 (sizeof(x->replay.bitmap) * 8));
1da177e4
LT		 1124 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1125 x->props.flags |= XFRM_STATE_NOECN;
1126 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1127 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1128 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1129 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4 1130
ea110733 1131 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1da177e4
LT		 1132 if (lifetime != NULL) {
1133 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1134 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1135 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1136 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1137 }
ea110733 1138 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1da177e4
LT		 1139 if (lifetime != NULL) {
1140 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1141 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1142 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1143 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1144 }
df71837d 1145
ea110733 1146 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 1147 if (sec_ctx != NULL) {
87536a81 1148 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 1149
1150 if (!uctx)
1151 goto out;
1152
1153 err = security_xfrm_state_alloc(x, uctx);
1154 kfree(uctx);
1155
1156 if (err)
1157 goto out;
1158 }
1159
ea110733 1160 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1161 if (sa->sadb_sa_auth) {
1162 int keysize = 0;
1163 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
7e50f84c 1164 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1165 err = -ENOSYS;
1166 goto out;
1167 }
1168 if (key)
1169 keysize = (key->sadb_key_bits + 7) / 8;
1170 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1e3d0c2c
DC		 1171 if (!x->aalg) {
1172 err = -ENOMEM;
1da177e4 1173 goto out;
1e3d0c2c 1174 }
1da177e4
LT		 1175 strcpy(x->aalg->alg_name, a->name);
1176 x->aalg->alg_key_len = 0;
1177 if (key) {
1178 x->aalg->alg_key_len = key->sadb_key_bits;
1179 memcpy(x->aalg->alg_key, key+1, keysize);
1180 }
c20a66f4 1181 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1da177e4
LT		 1182 x->props.aalgo = sa->sadb_sa_auth;
1183 /* x->algo.flags = sa->sadb_sa_flags; */
1184 }
1185 if (sa->sadb_sa_encrypt) {
1186 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1187 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1188 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1189 err = -ENOSYS;
1190 goto out;
1191 }
1192 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1e3d0c2c
DC		 1193 if (!x->calg) {
1194 err = -ENOMEM;
1da177e4 1195 goto out;
1e3d0c2c 1196 }
1da177e4
LT		 1197 strcpy(x->calg->alg_name, a->name);
1198 x->props.calgo = sa->sadb_sa_encrypt;
1199 } else {
1200 int keysize = 0;
1201 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1202 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1203 err = -ENOSYS;
1204 goto out;
1205 }
1206 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1207 if (key)
1208 keysize = (key->sadb_key_bits + 7) / 8;
1209 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1e3d0c2c
DC		 1210 if (!x->ealg) {
1211 err = -ENOMEM;
1da177e4 1212 goto out;
1e3d0c2c 1213 }
1da177e4
LT		 1214 strcpy(x->ealg->alg_name, a->name);
1215 x->ealg->alg_key_len = 0;
1216 if (key) {
1217 x->ealg->alg_key_len = key->sadb_key_bits;
1218 memcpy(x->ealg->alg_key, key+1, keysize);
1219 }
1220 x->props.ealgo = sa->sadb_sa_encrypt;
69b0137f 1221 x->geniv = a->uinfo.encr.geniv;
1da177e4
LT		 1222 }
1223 }
1224 /* x->algo.flags = sa->sadb_sa_flags; */
1225
8ff24541 1226 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4 1227 &x->props.saddr);
8ff24541 1228 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1229 &x->id.daddr);
1230
1231 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
4c93fbb0 1232 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1233 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1234 if (mode < 0) {
1235 err = -EINVAL;
1236 goto out;
1237 }
1238 x->props.mode = mode;
1da177e4
LT		 1239 x->props.reqid = sa2->sadb_x_sa2_reqid;
1240 }
1241
1242 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
4c93fbb0 1243 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1da177e4
LT		 1244
1245 /* Nobody uses this, but we try. */
1246 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1247 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1248 }
1249
4da51056 1250 if (!x->sel.family)
4a4b6271
JL		 1251 x->sel.family = x->props.family;
1252
1da177e4 1253 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
4c93fbb0 1254 const struct sadb_x_nat_t_type* n_type;
1da177e4
LT		 1255 struct xfrm_encap_tmpl *natt;
1256
1257 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1e3d0c2c
DC		 1258 if (!x->encap) {
1259 err = -ENOMEM;
1da177e4 1260 goto out;
1e3d0c2c 1261 }
1da177e4
LT		 1262
1263 natt = x->encap;
1264 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1265 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1266
1267 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
4c93fbb0 1268 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1269 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1270 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1271 }
1272 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
4c93fbb0 1273 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1274 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1275 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1276 }
a8d694c6 1277 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1da177e4
LT		 1278 }
1279
72cb6962
HX		 1280 err = xfrm_init_state(x);
1281 if (err)
1da177e4 1282 goto out;
72cb6962 1283
1da177e4 1284 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1285 return x;
1286
1287out:
1288 x->km.state = XFRM_STATE_DEAD;
1289 xfrm_state_put(x);
1290 return ERR_PTR(err);
1291}
1292
4c93fbb0 1293static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1294{
1295 return -EOPNOTSUPP;
1296}
1297
4c93fbb0 1298static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1299{
07fb0f17 1300 struct net *net = sock_net(sk);
1da177e4
LT		 1301 struct sk_buff *resp_skb;
1302 struct sadb_x_sa2 *sa2;
1303 struct sadb_address *saddr, *daddr;
1304 struct sadb_msg *out_hdr;
658b219e 1305 struct sadb_spirange *range;
1da177e4 1306 struct xfrm_state *x = NULL;
55569ce2 1307 int mode;
658b219e
HX		 1308 int err;
1309 u32 min_spi, max_spi;
1da177e4
LT		 1310 u32 reqid;
1311 u8 proto;
1312 unsigned short family;
1313 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1314
1315 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1316 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1317 return -EINVAL;
1318
1319 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1320 if (proto == 0)
1321 return -EINVAL;
1322
1323 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1324 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1325 if (mode < 0)
1326 return -EINVAL;
1da177e4
LT		 1327 reqid = sa2->sadb_x_sa2_reqid;
1328 } else {
1329 mode = 0;
1330 reqid = 0;
1331 }
1332
1333 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1334 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1335
1336 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1337 switch (family) {
1338 case AF_INET:
1339 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1340 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1341 break;
dfd56b8b 1342#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1343 case AF_INET6:
1344 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1345 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1346 break;
1347#endif
1348 }
1349
1350 if (hdr->sadb_msg_seq) {
bd55775c 1351 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
70e94e66 1352 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1da177e4
LT		 1353 xfrm_state_put(x);
1354 x = NULL;
1355 }
1356 }
1357
1358 if (!x)
bd55775c 1359 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1da177e4
LT		 1360
1361 if (x == NULL)
1362 return -ENOENT;
1363
658b219e
HX		 1364 min_spi = 0x100;
1365 max_spi = 0x0fffffff;
1da177e4 1366
658b219e
HX		 1367 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1368 if (range) {
1369 min_spi = range->sadb_spirange_min;
1370 max_spi = range->sadb_spirange_max;
1da177e4 1371 }
658b219e 1372
776e9dd9
FD		 1373 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1374 if (err) {
1375 xfrm_state_put(x);
1376 return err;
1377 }
1378
658b219e 1379 err = xfrm_alloc_spi(x, min_spi, max_spi);
050f009e 1380 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1381
1382 if (IS_ERR(resp_skb)) {
1383 xfrm_state_put(x);
1384 return PTR_ERR(resp_skb);
1385 }
1386
1387 out_hdr = (struct sadb_msg *) resp_skb->data;
1388 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1389 out_hdr->sadb_msg_type = SADB_GETSPI;
1390 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1391 out_hdr->sadb_msg_errno = 0;
1392 out_hdr->sadb_msg_reserved = 0;
1393 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1394 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1395
1396 xfrm_state_put(x);
1397
ba51b6be 1398 pfkey_broadcast(resp_skb, BROADCAST_ONE, sk, net);
1da177e4
LT		 1399
1400 return 0;
1401}
1402
4c93fbb0 1403static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1404{
07fb0f17 1405 struct net *net = sock_net(sk);
1da177e4
LT		 1406 struct xfrm_state *x;
1407
1408 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1409 return -EOPNOTSUPP;
1410
1411 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1412 return 0;
1413
bd55775c 1414 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1da177e4
LT		 1415 if (x == NULL)
1416 return 0;
1417
1418 spin_lock_bh(&x->lock);
5b8ef341 1419 if (x->km.state == XFRM_STATE_ACQ)
1da177e4 1420 x->km.state = XFRM_STATE_ERROR;
5b8ef341 1421
1da177e4
LT		 1422 spin_unlock_bh(&x->lock);
1423 xfrm_state_put(x);
1424 return 0;
1425}
1426
26b15dad
JHS		 1427static inline int event2poltype(int event)
1428{
1429 switch (event) {
f60f6b8f 1430 case XFRM_MSG_DELPOLICY:
26b15dad 1431 return SADB_X_SPDDELETE;
f60f6b8f 1432 case XFRM_MSG_NEWPOLICY:
26b15dad 1433 return SADB_X_SPDADD;
f60f6b8f 1434 case XFRM_MSG_UPDPOLICY:
26b15dad 1435 return SADB_X_SPDUPDATE;
f60f6b8f 1436 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1437 // return SADB_X_SPDEXPIRE;
1438 default:
207024b9 1439 pr_err("pfkey: Unknown policy event %d\n", event);
26b15dad
JHS		 1440 break;
1441 }
1442
1443 return 0;
1444}
1445
1446static inline int event2keytype(int event)
1447{
1448 switch (event) {
f60f6b8f 1449 case XFRM_MSG_DELSA:
26b15dad 1450 return SADB_DELETE;
f60f6b8f 1451 case XFRM_MSG_NEWSA:
26b15dad 1452 return SADB_ADD;
f60f6b8f 1453 case XFRM_MSG_UPDSA:
26b15dad 1454 return SADB_UPDATE;
f60f6b8f 1455 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1456 return SADB_EXPIRE;
1457 default:
207024b9 1458 pr_err("pfkey: Unknown SA event %d\n", event);
26b15dad
JHS		 1459 break;
1460 }
1461
1462 return 0;
1463}
1464
1465/* ADD/UPD/DEL */
214e005b 1466static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1467{
1468 struct sk_buff *skb;
1469 struct sadb_msg *hdr;
26b15dad 1470
050f009e 1471 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1472
1473 if (IS_ERR(skb))
1474 return PTR_ERR(skb);
1475
1476 hdr = (struct sadb_msg *) skb->data;
1477 hdr->sadb_msg_version = PF_KEY_V2;
1478 hdr->sadb_msg_type = event2keytype(c->event);
1479 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1480 hdr->sadb_msg_errno = 0;
1481 hdr->sadb_msg_reserved = 0;
1482 hdr->sadb_msg_seq = c->seq;
15e47304 1483 hdr->sadb_msg_pid = c->portid;
26b15dad 1484
ba51b6be 1485 pfkey_broadcast(skb, BROADCAST_ALL, NULL, xs_net(x));
26b15dad
JHS		 1486
1487 return 0;
1488}
1da177e4 1489
4c93fbb0 1490static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1491{
07fb0f17 1492 struct net *net = sock_net(sk);
1da177e4
LT		 1493 struct xfrm_state *x;
1494 int err;
26b15dad 1495 struct km_event c;
1da177e4 1496
07fb0f17 1497 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1da177e4
LT		 1498 if (IS_ERR(x))
1499 return PTR_ERR(x);
1500
26b15dad 1501 xfrm_state_hold(x);
1da177e4
LT		 1502 if (hdr->sadb_msg_type == SADB_ADD)
1503 err = xfrm_state_add(x);
1504 else
1505 err = xfrm_state_update(x);
1506
2e71029e 1507 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 1508
1da177e4
LT		 1509 if (err < 0) {
1510 x->km.state = XFRM_STATE_DEAD;
21380b81 1511 __xfrm_state_put(x);
7d6dfe1f 1512 goto out;
1da177e4
LT		 1513 }
1514
26b15dad 1515 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1516 c.event = XFRM_MSG_NEWSA;
26b15dad 1517 else
f60f6b8f 1518 c.event = XFRM_MSG_UPDSA;
26b15dad 1519 c.seq = hdr->sadb_msg_seq;
15e47304 1520 c.portid = hdr->sadb_msg_pid;
26b15dad 1521 km_state_notify(x, &c);
7d6dfe1f 1522out:
26b15dad 1523 xfrm_state_put(x);
26b15dad 1524 return err;
1da177e4
LT		 1525}
1526
4c93fbb0 1527static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1528{
07fb0f17 1529 struct net *net = sock_net(sk);
1da177e4 1530 struct xfrm_state *x;
26b15dad
JHS		 1531 struct km_event c;
1532 int err;
1da177e4
LT		 1533
1534 if (!ext_hdrs[SADB_EXT_SA-1] ||
1535 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1536 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1537 return -EINVAL;
1538
07fb0f17 1539 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1540 if (x == NULL)
1541 return -ESRCH;
1542
c8c05a8e
CZ		 1543 if ((err = security_xfrm_state_delete(x)))
1544 goto out;
1545
1da177e4 1546 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1547 err = -EPERM;
1548 goto out;
1da177e4 1549 }
161a09e7 1550
26b15dad 1551 err = xfrm_state_delete(x);
161a09e7 1552
c8c05a8e
CZ		 1553 if (err < 0)
1554 goto out;
1da177e4 1555
26b15dad 1556 c.seq = hdr->sadb_msg_seq;
15e47304 1557 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1558 c.event = XFRM_MSG_DELSA;
26b15dad 1559 km_state_notify(x, &c);
c8c05a8e 1560out:
2e71029e 1561 xfrm_audit_state_delete(x, err ? 0 : 1, true);
26b15dad 1562 xfrm_state_put(x);
1da177e4 1563
26b15dad 1564 return err;
1da177e4
LT		 1565}
1566
4c93fbb0 1567static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1568{
07fb0f17 1569 struct net *net = sock_net(sk);
1da177e4
LT		 1570 __u8 proto;
1571 struct sk_buff *out_skb;
1572 struct sadb_msg *out_hdr;
1573 struct xfrm_state *x;
1574
1575 if (!ext_hdrs[SADB_EXT_SA-1] ||
1576 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1577 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1578 return -EINVAL;
1579
07fb0f17 1580 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1581 if (x == NULL)
1582 return -ESRCH;
1583
050f009e 1584 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1585 proto = x->id.proto;
1586 xfrm_state_put(x);
1587 if (IS_ERR(out_skb))
1588 return PTR_ERR(out_skb);
1589
1590 out_hdr = (struct sadb_msg *) out_skb->data;
1591 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1592 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1593 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1594 out_hdr->sadb_msg_errno = 0;
1595 out_hdr->sadb_msg_reserved = 0;
1596 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1597 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
ba51b6be 1598 pfkey_broadcast(out_skb, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 1599
1600 return 0;
1601}
1602
4c93fbb0 1603static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
dd0fc66f 1604 gfp_t allocation)
1da177e4
LT		 1605{
1606 struct sk_buff *skb;
1607 struct sadb_msg *hdr;
1608 int len, auth_len, enc_len, i;
1609
7e50f84c 1610 auth_len = xfrm_count_pfkey_auth_supported();
1da177e4
LT		 1611 if (auth_len) {
1612 auth_len *= sizeof(struct sadb_alg);
1613 auth_len += sizeof(struct sadb_supported);
1614 }
8ff24541 1615
7e50f84c 1616 enc_len = xfrm_count_pfkey_enc_supported();
1da177e4
LT		 1617 if (enc_len) {
1618 enc_len *= sizeof(struct sadb_alg);
1619 enc_len += sizeof(struct sadb_supported);
1620 }
8ff24541 1621
1da177e4
LT		 1622 len = enc_len + auth_len + sizeof(struct sadb_msg);
1623
1624 skb = alloc_skb(len + 16, allocation);
1625 if (!skb)
1626 goto out_put_algs;
1627
1628 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1629 pfkey_hdr_dup(hdr, orig);
1630 hdr->sadb_msg_errno = 0;
1631 hdr->sadb_msg_len = len / sizeof(uint64_t);
1632
1633 if (auth_len) {
1634 struct sadb_supported *sp;
1635 struct sadb_alg *ap;
1636
1637 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1638 ap = (struct sadb_alg *) (sp + 1);
1639
1640 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1641 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1642
1643 for (i = 0; ; i++) {
1644 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1645 if (!aalg)
1646 break;
7e50f84c
JK		 1647 if (!aalg->pfkey_supported)
1648 continue;
1da177e4
LT		 1649 if (aalg->available)
1650 *ap++ = aalg->desc;
1651 }
1652 }
1653
1654 if (enc_len) {
1655 struct sadb_supported *sp;
1656 struct sadb_alg *ap;
1657
1658 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1659 ap = (struct sadb_alg *) (sp + 1);
1660
1661 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1662 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1663
1664 for (i = 0; ; i++) {
1665 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1666 if (!ealg)
1667 break;
7e50f84c
JK		 1668 if (!ealg->pfkey_supported)
1669 continue;
1da177e4
LT		 1670 if (ealg->available)
1671 *ap++ = ealg->desc;
1672 }
1673 }
1674
1675out_put_algs:
1676 return skb;
1677}
1678
4c93fbb0 1679static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1680{
1681 struct pfkey_sock *pfk = pfkey_sk(sk);
1682 struct sk_buff *supp_skb;
1683
1684 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1685 return -EINVAL;
1686
1687 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1688 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1689 return -EEXIST;
1690 pfk->registered |= (1<<hdr->sadb_msg_satype);
1691 }
1692
1693 xfrm_probe_algs();
8ff24541 1694
1da177e4
LT		 1695 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1696 if (!supp_skb) {
1697 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1698 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1699
1700 return -ENOBUFS;
1701 }
1702
ba51b6be 1703 pfkey_broadcast(supp_skb, BROADCAST_REGISTERED, sk, sock_net(sk));
1da177e4
LT		 1704
1705 return 0;
1706}
1707
4c93fbb0 1708static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
8be987d7
JHS		 1709{
1710 struct sk_buff *skb;
1711 struct sadb_msg *hdr;
1712
1713 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1714 if (!skb)
1715 return -ENOBUFS;
1716
1717 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1718 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1719 hdr->sadb_msg_errno = (uint8_t) 0;
1720 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1721
ba51b6be 1722 return pfkey_broadcast(skb, BROADCAST_ONE, sk, sock_net(sk));
8be987d7
JHS		 1723}
1724
214e005b 1725static int key_notify_sa_flush(const struct km_event *c)
26b15dad
JHS		 1726{
1727 struct sk_buff *skb;
1728 struct sadb_msg *hdr;
1729
1730 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1731 if (!skb)
1732 return -ENOBUFS;
1733 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1734 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1735 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad 1736 hdr->sadb_msg_seq = c->seq;
15e47304 1737 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 1738 hdr->sadb_msg_version = PF_KEY_V2;
1739 hdr->sadb_msg_errno = (uint8_t) 0;
1740 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 1741 hdr->sadb_msg_reserved = 0;
26b15dad 1742
ba51b6be 1743 pfkey_broadcast(skb, BROADCAST_ALL, NULL, c->net);
26b15dad
JHS		 1744
1745 return 0;
1746}
1747
4c93fbb0 1748static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1749{
07fb0f17 1750 struct net *net = sock_net(sk);
95c96174 1751 unsigned int proto;
26b15dad 1752 struct km_event c;
8be987d7 1753 int err, err2;
1da177e4
LT		 1754
1755 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1756 if (proto == 0)
1757 return -EINVAL;
1758
2e71029e 1759 err = xfrm_state_flush(net, proto, true);
8be987d7 1760 err2 = unicast_flush_resp(sk, hdr);
9e64cc95
JHS		 1761 if (err || err2) {
1762 if (err == -ESRCH) /* empty table - go quietly */
1763 err = 0;
8be987d7 1764 return err ? err : err2;
9e64cc95 1765 }
8be987d7 1766
bf08867f 1767 c.data.proto = proto;
26b15dad 1768 c.seq = hdr->sadb_msg_seq;
15e47304 1769 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1770 c.event = XFRM_MSG_FLUSHSA;
07fb0f17 1771 c.net = net;
26b15dad 1772 km_state_notify(NULL, &c);
1da177e4
LT		 1773
1774 return 0;
1775}
1776
1da177e4
LT		 1777static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1778{
83321d6b 1779 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 1780 struct sk_buff *out_skb;
1781 struct sadb_msg *out_hdr;
1782
83321d6b
TT		 1783 if (!pfkey_can_dump(&pfk->sk))
1784 return -ENOBUFS;
1785
050f009e 1786 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1787 if (IS_ERR(out_skb))
1788 return PTR_ERR(out_skb);
1789
1790 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 1791 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 1792 out_hdr->sadb_msg_type = SADB_DUMP;
1793 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1794 out_hdr->sadb_msg_errno = 0;
1795 out_hdr->sadb_msg_reserved = 0;
12a169e7 1796 out_hdr->sadb_msg_seq = count + 1;
15e47304 1797 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 1798
1799 if (pfk->dump.skb)
ba51b6be 1800 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
07fb0f17 1801 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 1802 pfk->dump.skb = out_skb;
1803
1da177e4
LT		 1804 return 0;
1805}
1806
83321d6b
TT		 1807static int pfkey_dump_sa(struct pfkey_sock *pfk)
1808{
07fb0f17
AD		 1809 struct net *net = sock_net(&pfk->sk);
1810 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
83321d6b
TT		 1811}
1812
1813static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1814{
283bc9f3
FD		 1815 struct net *net = sock_net(&pfk->sk);
1816
1817 xfrm_state_walk_done(&pfk->dump.u.state, net);
83321d6b
TT		 1818}
1819
4c93fbb0 1820static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1821{
1822 u8 proto;
870a2df4 1823 struct xfrm_address_filter *filter = NULL;
83321d6b
TT		 1824 struct pfkey_sock *pfk = pfkey_sk(sk);
1825
89e357d8
YS		 1826 mutex_lock(&pfk->dump_lock);
1827 if (pfk->dump.dump != NULL) {
1828 mutex_unlock(&pfk->dump_lock);
83321d6b 1829 return -EBUSY;
89e357d8 1830 }
1da177e4
LT		 1831
1832 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
89e357d8
YS		 1833 if (proto == 0) {
1834 mutex_unlock(&pfk->dump_lock);
1da177e4 1835 return -EINVAL;
89e357d8 1836 }
1da177e4 1837
d3623099
ND		 1838 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1839 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1840
1841 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
89e357d8
YS		 1842 if (filter == NULL) {
1843 mutex_unlock(&pfk->dump_lock);
d3623099 1844 return -ENOMEM;
89e357d8 1845 }
d3623099
ND		 1846
1847 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1848 sizeof(xfrm_address_t));
1849 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1850 sizeof(xfrm_address_t));
1851 filter->family = xfilter->sadb_x_filter_family;
1852 filter->splen = xfilter->sadb_x_filter_splen;
1853 filter->dplen = xfilter->sadb_x_filter_dplen;
1854 }
1855
83321d6b 1856 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 1857 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 1858 pfk->dump.dump = pfkey_dump_sa;
1859 pfk->dump.done = pfkey_dump_sa_done;
d3623099 1860 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
89e357d8 1861 mutex_unlock(&pfk->dump_lock);
4c563f76 1862
83321d6b 1863 return pfkey_do_dump(pfk);
1da177e4
LT		 1864}
1865
4c93fbb0 1866static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1867{
1868 struct pfkey_sock *pfk = pfkey_sk(sk);
1869 int satype = hdr->sadb_msg_satype;
4c93fbb0 1870 bool reset_errno = false;
1da177e4
LT		 1871
1872 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
4c93fbb0 1873 reset_errno = true;
1da177e4
LT		 1874 if (satype != 0 && satype != 1)
1875 return -EINVAL;
1876 pfk->promisc = satype;
1877 }
4c93fbb0
DM		 1878 if (reset_errno && skb_cloned(skb))
1879 skb = skb_copy(skb, GFP_KERNEL);
1880 else
1881 skb = skb_clone(skb, GFP_KERNEL);
1882
1883 if (reset_errno && skb) {
1884 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1885 new_hdr->sadb_msg_errno = 0;
1886 }
1887
ba51b6be 1888 pfkey_broadcast(skb, BROADCAST_ALL, NULL, sock_net(sk));
1da177e4
LT		 1889 return 0;
1890}
1891
1892static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1893{
1894 int i;
1895 u32 reqid = *(u32*)ptr;
1896
1897 for (i=0; i<xp->xfrm_nr; i++) {
1898 if (xp->xfrm_vec[i].reqid == reqid)
1899 return -EEXIST;
1900 }
1901 return 0;
1902}
1903
07fb0f17 1904static u32 gen_reqid(struct net *net)
1da177e4 1905{
4c563f76 1906 struct xfrm_policy_walk walk;
1da177e4 1907 u32 start;
4c563f76 1908 int rc;
1da177e4
LT		 1909 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1910
1911 start = reqid;
1912 do {
1913 ++reqid;
1914 if (reqid == 0)
1915 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76 1916 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
07fb0f17 1917 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
283bc9f3 1918 xfrm_policy_walk_done(&walk, net);
4c563f76 1919 if (rc != -EEXIST)
1da177e4
LT		 1920 return reqid;
1921 } while (reqid != start);
1922 return 0;
1923}
1924
1925static int
1926parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1927{
07fb0f17 1928 struct net *net = xp_net(xp);
1da177e4 1929 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
55569ce2 1930 int mode;
1da177e4
LT		 1931
1932 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1933 return -ELOOP;
1934
1935 if (rq->sadb_x_ipsecrequest_mode == 0)
1936 return -EINVAL;
1937
1938 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1939 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1940 return -EINVAL;
1941 t->mode = mode;
1da177e4
LT		 1942 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1943 t->optional = 1;
1944 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1945 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1946 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1947 t->reqid = 0;
07fb0f17 1948 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1da177e4
LT		 1949 return -ENOBUFS;
1950 }
1951
1952 /* addresses present only in tunnel mode */
7e49e6de 1953 if (t->mode == XFRM_MODE_TUNNEL) {
096f41d3 1954 int err;
5f95ac91 1955
096f41d3
HX		 1956 err = parse_sockaddr_pair(
1957 (struct sockaddr *)(rq + 1),
1958 rq->sadb_x_ipsecrequest_len - sizeof(*rq),
1959 &t->saddr, &t->id.daddr, &t->encap_family);
1960 if (err)
1961 return err;
2718aa7c
MK		 1962 } else
1963 t->encap_family = xp->family;
1964
1da177e4 1965 /* No way to set this via kame pfkey */
c5d18e98 1966 t->allalgs = 1;
1da177e4
LT		 1967 xp->xfrm_nr++;
1968 return 0;
1969}
1970
1971static int
1972parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1973{
1974 int err;
1975 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1976 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1977
f674e72f
DC		 1978 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1979 return -EINVAL;
1980
096f41d3
HX		 1981 while (len >= sizeof(*rq)) {
1982 if (len < rq->sadb_x_ipsecrequest_len ||
1983 rq->sadb_x_ipsecrequest_len < sizeof(*rq))
1984 return -EINVAL;
1985
1da177e4
LT		 1986 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1987 return err;
1988 len -= rq->sadb_x_ipsecrequest_len;
1989 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1990 }
1991 return 0;
1992}
1993
4c93fbb0 1994static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
df71837d
TJ		 1995{
1996 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1997
1998 if (xfrm_ctx) {
1999 int len = sizeof(struct sadb_x_sec_ctx);
2000 len += xfrm_ctx->ctx_len;
2001 return PFKEY_ALIGN8(len);
2002 }
2003 return 0;
2004}
2005
4c93fbb0 2006static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1da177e4 2007{
4c93fbb0 2008 const struct xfrm_tmpl *t;
1da177e4 2009 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 2010 int socklen = 0;
2011 int i;
2012
2013 for (i=0; i<xp->xfrm_nr; i++) {
2014 t = xp->xfrm_vec + i;
9e8b4ed8 2015 socklen += pfkey_sockaddr_len(t->encap_family);
2718aa7c 2016 }
1da177e4
LT		 2017
2018 return sizeof(struct sadb_msg) +
2019 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 2020 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 2021 (sockaddr_size * 2) +
2022 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 2023 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
2024 (socklen * 2) +
df71837d 2025 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 2026}
2027
4c93fbb0 2028static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1da177e4
LT		 2029{
2030 struct sk_buff *skb;
2031 int size;
2032
2033 size = pfkey_xfrm_policy2msg_size(xp);
2034
2035 skb = alloc_skb(size + 16, GFP_ATOMIC);
2036 if (skb == NULL)
2037 return ERR_PTR(-ENOBUFS);
2038
2039 return skb;
2040}
2041
4c93fbb0 2042static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
1da177e4
LT		 2043{
2044 struct sadb_msg *hdr;
2045 struct sadb_address *addr;
2046 struct sadb_lifetime *lifetime;
2047 struct sadb_x_policy *pol;
df71837d
TJ		 2048 struct sadb_x_sec_ctx *sec_ctx;
2049 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 2050 int i;
2051 int size;
2052 int sockaddr_size = pfkey_sockaddr_size(xp->family);
9e8b4ed8 2053 int socklen = pfkey_sockaddr_len(xp->family);
1da177e4
LT		 2054
2055 size = pfkey_xfrm_policy2msg_size(xp);
2056
2057 /* call should fill header later */
2058 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2059 memset(hdr, 0, size); /* XXX do we need this ? */
2060
2061 /* src address */
8ff24541 2062 addr = (struct sadb_address*) skb_put(skb,
1da177e4 2063 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 2064 addr->sadb_address_len =
1da177e4
LT		 2065 (sizeof(struct sadb_address)+sockaddr_size)/
2066 sizeof(uint64_t);
2067 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2068 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2069 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2070 addr->sadb_address_reserved = 0;
e5b56652
YH		 2071 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2072 xp->selector.sport,
2073 (struct sockaddr *) (addr + 1),
2074 xp->family))
1da177e4
LT		 2075 BUG();
2076
2077 /* dst address */
8ff24541 2078 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 2079 sizeof(struct sadb_address)+sockaddr_size);
2080 addr->sadb_address_len =
2081 (sizeof(struct sadb_address)+sockaddr_size)/
2082 sizeof(uint64_t);
2083 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2084 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2085 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4 2086 addr->sadb_address_reserved = 0;
e5b56652
YH		 2087
2088 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2089 (struct sockaddr *) (addr + 1),
2090 xp->family);
1da177e4
LT		 2091
2092 /* hard time */
8ff24541 2093 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2094 sizeof(struct sadb_lifetime));
2095 lifetime->sadb_lifetime_len =
2096 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2097 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2098 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2099 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2100 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2101 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2102 /* soft time */
8ff24541 2103 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2104 sizeof(struct sadb_lifetime));
2105 lifetime->sadb_lifetime_len =
2106 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2107 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2108 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2109 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2110 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2111 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2112 /* current time */
8ff24541 2113 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2114 sizeof(struct sadb_lifetime));
2115 lifetime->sadb_lifetime_len =
2116 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2117 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2118 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2119 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2120 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2121 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2122
2123 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2124 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2125 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2126 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2127 if (xp->action == XFRM_POLICY_ALLOW) {
2128 if (xp->xfrm_nr)
2129 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2130 else
2131 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2132 }
2133 pol->sadb_x_policy_dir = dir+1;
ff862a46 2134 pol->sadb_x_policy_reserved = 0;
1da177e4
LT		 2135 pol->sadb_x_policy_id = xp->index;
2136 pol->sadb_x_policy_priority = xp->priority;
2137
2138 for (i=0; i<xp->xfrm_nr; i++) {
4c93fbb0 2139 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
1da177e4 2140 struct sadb_x_ipsecrequest *rq;
1da177e4 2141 int req_size;
55569ce2 2142 int mode;
1da177e4
LT		 2143
2144 req_size = sizeof(struct sadb_x_ipsecrequest);
e5b56652
YH		 2145 if (t->mode == XFRM_MODE_TUNNEL) {
2146 socklen = pfkey_sockaddr_len(t->encap_family);
2147 req_size += socklen * 2;
2148 } else {
1da177e4 2149 size -= 2*socklen;
e5b56652 2150 }
1da177e4
LT		 2151 rq = (void*)skb_put(skb, req_size);
2152 pol->sadb_x_policy_len += req_size/8;
2153 memset(rq, 0, sizeof(*rq));
2154 rq->sadb_x_ipsecrequest_len = req_size;
2155 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2156 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2157 return -EINVAL;
fefaa75e 2158 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2159 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2160 if (t->reqid)
2161 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2162 if (t->optional)
2163 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2164 rq->sadb_x_ipsecrequest_reqid = t->reqid;
e5b56652 2165
7e49e6de 2166 if (t->mode == XFRM_MODE_TUNNEL) {
e5b56652
YH		 2167 u8 *sa = (void *)(rq + 1);
2168 pfkey_sockaddr_fill(&t->saddr, 0,
2169 (struct sockaddr *)sa,
2170 t->encap_family);
2171 pfkey_sockaddr_fill(&t->id.daddr, 0,
2172 (struct sockaddr *) (sa + socklen),
2173 t->encap_family);
1da177e4
LT		 2174 }
2175 }
df71837d
TJ		 2176
2177 /* security context */
2178 if ((xfrm_ctx = xp->security)) {
2179 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2180
2181 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2182 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2183 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2184 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2185 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2186 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2187 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2188 xfrm_ctx->ctx_len);
2189 }
2190
1da177e4
LT		 2191 hdr->sadb_msg_len = size / sizeof(uint64_t);
2192 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
55569ce2
KM		 2193
2194 return 0;
1da177e4
LT		 2195}
2196
214e005b 2197static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2198{
2199 struct sk_buff *out_skb;
2200 struct sadb_msg *out_hdr;
2201 int err;
2202
2203 out_skb = pfkey_xfrm_policy2msg_prep(xp);
9a127aad
DC		 2204 if (IS_ERR(out_skb))
2205 return PTR_ERR(out_skb);
2206
55569ce2
KM		 2207 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2208 if (err < 0)
2209 return err;
26b15dad
JHS		 2210
2211 out_hdr = (struct sadb_msg *) out_skb->data;
2212 out_hdr->sadb_msg_version = PF_KEY_V2;
2213
f60f6b8f 2214 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2215 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2216 else
2217 out_hdr->sadb_msg_type = event2poltype(c->event);
2218 out_hdr->sadb_msg_errno = 0;
2219 out_hdr->sadb_msg_seq = c->seq;
15e47304 2220 out_hdr->sadb_msg_pid = c->portid;
ba51b6be 2221 pfkey_broadcast(out_skb, BROADCAST_ALL, NULL, xp_net(xp));
26b15dad
JHS		 2222 return 0;
2223
2224}
2225
4c93fbb0 2226static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2227{
07fb0f17 2228 struct net *net = sock_net(sk);
df71837d 2229 int err = 0;
1da177e4
LT		 2230 struct sadb_lifetime *lifetime;
2231 struct sadb_address *sa;
2232 struct sadb_x_policy *pol;
2233 struct xfrm_policy *xp;
26b15dad 2234 struct km_event c;
df71837d 2235 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2236
2237 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2238 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2239 !ext_hdrs[SADB_X_EXT_POLICY-1])
2240 return -EINVAL;
2241
2242 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2243 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2244 return -EINVAL;
2245 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2246 return -EINVAL;
2247
07fb0f17 2248 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2249 if (xp == NULL)
2250 return -ENOBUFS;
2251
2252 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2253 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2254 xp->priority = pol->sadb_x_policy_priority;
2255
d0d79c3f 2256 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4 2257 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
1da177e4
LT		 2258 xp->selector.family = xp->family;
2259 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2260 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2261 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2262 if (xp->selector.sport)
8f83f23e 2263 xp->selector.sport_mask = htons(0xffff);
1da177e4 2264
d0d79c3f 2265 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2266 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2267 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2268
2269 /* Amusing, we set this twice. KAME apps appear to set same value
2270 * in both addresses.
2271 */
2272 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2273
2274 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2275 if (xp->selector.dport)
8f83f23e 2276 xp->selector.dport_mask = htons(0xffff);
1da177e4 2277
ea110733 2278 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2279 if (sec_ctx != NULL) {
87536a81 2280 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2281
2282 if (!uctx) {
2283 err = -ENOBUFS;
2284 goto out;
2285 }
2286
52a4c640 2287 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
df71837d
TJ		 2288 kfree(uctx);
2289
2290 if (err)
2291 goto out;
2292 }
2293
1da177e4
LT		 2294 xp->lft.soft_byte_limit = XFRM_INF;
2295 xp->lft.hard_byte_limit = XFRM_INF;
2296 xp->lft.soft_packet_limit = XFRM_INF;
2297 xp->lft.hard_packet_limit = XFRM_INF;
2298 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2299 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2300 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2301 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2302 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2303 }
2304 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2305 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2306 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2307 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2308 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2309 }
2310 xp->xfrm_nr = 0;
2311 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2312 (err = parse_ipsecrequests(xp, pol)) < 0)
2313 goto out;
2314
1da177e4
LT		 2315 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2316 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2317
2e71029e 2318 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 2319
df71837d
TJ		 2320 if (err)
2321 goto out;
1da177e4 2322
26b15dad 2323 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2324 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2325 else
f60f6b8f 2326 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2327
26b15dad 2328 c.seq = hdr->sadb_msg_seq;
15e47304 2329 c.portid = hdr->sadb_msg_pid;
1da177e4 2330
26b15dad
JHS		 2331 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2332 xfrm_pol_put(xp);
1da177e4
LT		 2333 return 0;
2334
2335out:
12a169e7 2336 xp->walk.dead = 1;
64c31b3f 2337 xfrm_policy_destroy(xp);
1da177e4
LT		 2338 return err;
2339}
2340
4c93fbb0 2341static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2342{
07fb0f17 2343 struct net *net = sock_net(sk);
1da177e4
LT		 2344 int err;
2345 struct sadb_address *sa;
2346 struct sadb_x_policy *pol;
03e1ad7b 2347 struct xfrm_policy *xp;
1da177e4 2348 struct xfrm_selector sel;
26b15dad 2349 struct km_event c;
df71837d 2350 struct sadb_x_sec_ctx *sec_ctx;
2db3e47e 2351 struct xfrm_sec_ctx *pol_ctx = NULL;
1da177e4
LT		 2352
2353 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2354 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2355 !ext_hdrs[SADB_X_EXT_POLICY-1])
2356 return -EINVAL;
2357
2358 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2359 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2360 return -EINVAL;
2361
2362 memset(&sel, 0, sizeof(sel));
2363
d0d79c3f 2364 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4
LT		 2365 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2366 sel.prefixlen_s = sa->sadb_address_prefixlen;
2367 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2368 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2369 if (sel.sport)
8f83f23e 2370 sel.sport_mask = htons(0xffff);
1da177e4 2371
d0d79c3f 2372 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2373 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2374 sel.prefixlen_d = sa->sadb_address_prefixlen;
2375 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2376 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2377 if (sel.dport)
8f83f23e 2378 sel.dport_mask = htons(0xffff);
1da177e4 2379
ea110733 2380 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d 2381 if (sec_ctx != NULL) {
87536a81 2382 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
df71837d
TJ		 2383
2384 if (!uctx)
2385 return -ENOMEM;
2386
52a4c640 2387 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
df71837d 2388 kfree(uctx);
df71837d
TJ		 2389 if (err)
2390 return err;
2db3e47e 2391 }
161a09e7 2392
8ca2e93b 2393 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
03e1ad7b
PM		 2394 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2395 1, &err);
2396 security_xfrm_policy_free(pol_ctx);
1da177e4
LT		 2397 if (xp == NULL)
2398 return -ENOENT;
2399
2e71029e 2400 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 2401
2402 if (err)
c8c05a8e 2403 goto out;
13fcfbb0 2404
26b15dad 2405 c.seq = hdr->sadb_msg_seq;
15e47304 2406 c.portid = hdr->sadb_msg_pid;
1839faab 2407 c.data.byid = 0;
f60f6b8f 2408 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2409 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2410
c8c05a8e 2411out:
26b15dad 2412 xfrm_pol_put(xp);
e4c17216
PM		 2413 if (err == 0)
2414 xfrm_garbage_collect(net);
26b15dad
JHS		 2415 return err;
2416}
2417
4c93fbb0 2418static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
26b15dad
JHS		 2419{
2420 int err;
2421 struct sk_buff *out_skb;
2422 struct sadb_msg *out_hdr;
2423 err = 0;
2424
1da177e4
LT		 2425 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2426 if (IS_ERR(out_skb)) {
2427 err = PTR_ERR(out_skb);
2428 goto out;
2429 }
55569ce2
KM		 2430 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2431 if (err < 0)
2432 goto out;
1da177e4
LT		 2433
2434 out_hdr = (struct sadb_msg *) out_skb->data;
2435 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2436 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2437 out_hdr->sadb_msg_satype = 0;
2438 out_hdr->sadb_msg_errno = 0;
2439 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2440 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
ba51b6be 2441 pfkey_broadcast(out_skb, BROADCAST_ONE, sk, xp_net(xp));
1da177e4
LT		 2442 err = 0;
2443
2444out:
1da177e4
LT		 2445 return err;
2446}
2447
08de61be
SS		 2448static int pfkey_sockaddr_pair_size(sa_family_t family)
2449{
9e8b4ed8 2450 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
08de61be
SS		 2451}
2452
13c1d189 2453static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
08de61be
SS		 2454 xfrm_address_t *saddr, xfrm_address_t *daddr,
2455 u16 *family)
2456{
5f95ac91
YH		 2457 int af, socklen;
2458
096f41d3 2459 if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
08de61be
SS		 2460 return -EINVAL;
2461
13c1d189 2462 af = pfkey_sockaddr_extract(sa, saddr);
5f95ac91
YH		 2463 if (!af)
2464 return -EINVAL;
2465
2466 socklen = pfkey_sockaddr_len(af);
13c1d189 2467 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
5f95ac91 2468 daddr) != af)
08de61be 2469 return -EINVAL;
08de61be 2470
5f95ac91 2471 *family = af;
08de61be
SS		 2472 return 0;
2473}
2474
096f41d3 2475#ifdef CONFIG_NET_KEY_MIGRATE
08de61be
SS		 2476static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2477 struct xfrm_migrate *m)
2478{
2479 int err;
2480 struct sadb_x_ipsecrequest *rq2;
55569ce2 2481 int mode;
08de61be 2482
096f41d3
HX		 2483 if (len < sizeof(*rq1) ||
2484 len < rq1->sadb_x_ipsecrequest_len ||
2485 rq1->sadb_x_ipsecrequest_len < sizeof(*rq1))
08de61be
SS		 2486 return -EINVAL;
2487
2488 /* old endoints */
13c1d189 2489 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
096f41d3 2490 rq1->sadb_x_ipsecrequest_len - sizeof(*rq1),
13c1d189 2491 &m->old_saddr, &m->old_daddr,
08de61be
SS		 2492 &m->old_family);
2493 if (err)
2494 return err;
2495
2496 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2497 len -= rq1->sadb_x_ipsecrequest_len;
2498
096f41d3
HX		 2499 if (len <= sizeof(*rq2) ||
2500 len < rq2->sadb_x_ipsecrequest_len ||
2501 rq2->sadb_x_ipsecrequest_len < sizeof(*rq2))
08de61be
SS		 2502 return -EINVAL;
2503
2504 /* new endpoints */
13c1d189 2505 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
096f41d3 2506 rq2->sadb_x_ipsecrequest_len - sizeof(*rq2),
13c1d189 2507 &m->new_saddr, &m->new_daddr,
08de61be
SS		 2508 &m->new_family);
2509 if (err)
2510 return err;
2511
2512 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2513 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2514 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2515 return -EINVAL;
2516
2517 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2518 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2519 return -EINVAL;
2520 m->mode = mode;
08de61be
SS		 2521 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2522
2523 return ((int)(rq1->sadb_x_ipsecrequest_len +
2524 rq2->sadb_x_ipsecrequest_len));
2525}
2526
2527static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2528 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2529{
2530 int i, len, ret, err = -EINVAL;
2531 u8 dir;
2532 struct sadb_address *sa;
13c1d189 2533 struct sadb_x_kmaddress *kma;
08de61be
SS		 2534 struct sadb_x_policy *pol;
2535 struct sadb_x_ipsecrequest *rq;
2536 struct xfrm_selector sel;
2537 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2538 struct xfrm_kmaddress k;
8d549c4f 2539 struct net *net = sock_net(sk);
08de61be
SS		 2540
2541 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
13c1d189 2542 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
08de61be
SS		 2543 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2544 err = -EINVAL;
2545 goto out;
2546 }
2547
13c1d189 2548 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
08de61be 2549 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
08de61be
SS		 2550
2551 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2552 err = -EINVAL;
2553 goto out;
2554 }
2555
13c1d189
AE		 2556 if (kma) {
2557 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2558 k.reserved = kma->sadb_x_kmaddress_reserved;
2559 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2560 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2561 &k.local, &k.remote, &k.family);
2562 if (ret < 0) {
2563 err = ret;
2564 goto out;
2565 }
2566 }
2567
08de61be
SS		 2568 dir = pol->sadb_x_policy_dir - 1;
2569 memset(&sel, 0, sizeof(sel));
2570
2571 /* set source address info of selector */
2572 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2573 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2574 sel.prefixlen_s = sa->sadb_address_prefixlen;
2575 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2576 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2577 if (sel.sport)
582ee43d 2578 sel.sport_mask = htons(0xffff);
08de61be
SS		 2579
2580 /* set destination address info of selector */
47162c0b 2581 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
08de61be
SS		 2582 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2583 sel.prefixlen_d = sa->sadb_address_prefixlen;
2584 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2585 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2586 if (sel.dport)
582ee43d 2587 sel.dport_mask = htons(0xffff);
08de61be
SS		 2588
2589 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2590
2591 /* extract ipsecrequests */
2592 i = 0;
2593 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2594
2595 while (len > 0 && i < XFRM_MAX_DEPTH) {
2596 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2597 if (ret < 0) {
2598 err = ret;
2599 goto out;
2600 } else {
2601 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2602 len -= ret;
2603 i++;
2604 }
2605 }
2606
2607 if (!i || len > 0) {
2608 err = -EINVAL;
2609 goto out;
2610 }
2611
13c1d189 2612 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
8d549c4f 2613 kma ? &k : NULL, net);
08de61be
SS		 2614
2615 out:
2616 return err;
2617}
2618#else
2619static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
7f6daa63 2620 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2621{
2622 return -ENOPROTOOPT;
2623}
2624#endif
2625
2626
4c93fbb0 2627static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2628{
07fb0f17 2629 struct net *net = sock_net(sk);
77d8d7a6 2630 unsigned int dir;
215a2dd3 2631 int err = 0, delete;
1da177e4
LT		 2632 struct sadb_x_policy *pol;
2633 struct xfrm_policy *xp;
26b15dad 2634 struct km_event c;
1da177e4
LT		 2635
2636 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2637 return -EINVAL;
2638
77d8d7a6
HX		 2639 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2640 if (dir >= XFRM_POLICY_MAX)
2641 return -EINVAL;
2642
215a2dd3 2643 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
8ca2e93b 2644 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
bd55775c 2645 dir, pol->sadb_x_policy_id, delete, &err);
1da177e4
LT		 2646 if (xp == NULL)
2647 return -ENOENT;
2648
215a2dd3 2649 if (delete) {
2e71029e 2650 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1da177e4 2651
215a2dd3
EP		 2652 if (err)
2653 goto out;
2654 c.seq = hdr->sadb_msg_seq;
15e47304 2655 c.portid = hdr->sadb_msg_pid;
bf08867f 2656 c.data.byid = 1;
f60f6b8f 2657 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2658 km_policy_notify(xp, dir, &c);
26b15dad 2659 } else {
77d8d7a6 2660 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2661 }
1da177e4 2662
215a2dd3 2663out:
1da177e4 2664 xfrm_pol_put(xp);
e4c17216
PM		 2665 if (delete && err == 0)
2666 xfrm_garbage_collect(net);
1da177e4
LT		 2667 return err;
2668}
2669
2670static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2671{
83321d6b 2672 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 2673 struct sk_buff *out_skb;
2674 struct sadb_msg *out_hdr;
55569ce2 2675 int err;
1da177e4 2676
83321d6b
TT		 2677 if (!pfkey_can_dump(&pfk->sk))
2678 return -ENOBUFS;
2679
1da177e4
LT		 2680 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2681 if (IS_ERR(out_skb))
2682 return PTR_ERR(out_skb);
2683
55569ce2
KM		 2684 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2685 if (err < 0)
2686 return err;
1da177e4
LT		 2687
2688 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 2689 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 2690 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2691 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2692 out_hdr->sadb_msg_errno = 0;
12a169e7 2693 out_hdr->sadb_msg_seq = count + 1;
15e47304 2694 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 2695
2696 if (pfk->dump.skb)
ba51b6be 2697 pfkey_broadcast(pfk->dump.skb, BROADCAST_ONE,
07fb0f17 2698 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 2699 pfk->dump.skb = out_skb;
2700
1da177e4
LT		 2701 return 0;
2702}
2703
83321d6b
TT		 2704static int pfkey_dump_sp(struct pfkey_sock *pfk)
2705{
07fb0f17
AD		 2706 struct net *net = sock_net(&pfk->sk);
2707 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
83321d6b
TT		 2708}
2709
2710static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2711{
283bc9f3
FD		 2712 struct net *net = sock_net((struct sock *)pfk);
2713
2714 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
83321d6b
TT		 2715}
2716
4c93fbb0 2717static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2718{
83321d6b 2719 struct pfkey_sock *pfk = pfkey_sk(sk);
4c563f76 2720
89e357d8
YS		 2721 mutex_lock(&pfk->dump_lock);
2722 if (pfk->dump.dump != NULL) {
2723 mutex_unlock(&pfk->dump_lock);
83321d6b 2724 return -EBUSY;
89e357d8 2725 }
1da177e4 2726
83321d6b 2727 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 2728 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 2729 pfk->dump.dump = pfkey_dump_sp;
2730 pfk->dump.done = pfkey_dump_sp_done;
2731 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
89e357d8 2732 mutex_unlock(&pfk->dump_lock);
83321d6b
TT		 2733
2734 return pfkey_do_dump(pfk);
1da177e4
LT		 2735}
2736
214e005b 2737static int key_notify_policy_flush(const struct km_event *c)
1da177e4
LT		 2738{
2739 struct sk_buff *skb_out;
26b15dad 2740 struct sadb_msg *hdr;
1da177e4 2741
26b15dad 2742 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2743 if (!skb_out)
2744 return -ENOBUFS;
26b15dad 2745 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2746 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad 2747 hdr->sadb_msg_seq = c->seq;
15e47304 2748 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 2749 hdr->sadb_msg_version = PF_KEY_V2;
2750 hdr->sadb_msg_errno = (uint8_t) 0;
85dfb745 2751 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
26b15dad 2752 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 2753 hdr->sadb_msg_reserved = 0;
ba51b6be 2754 pfkey_broadcast(skb_out, BROADCAST_ALL, NULL, c->net);
26b15dad 2755 return 0;
1da177e4 2756
26b15dad
JHS		 2757}
2758
4c93fbb0 2759static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
26b15dad 2760{
07fb0f17 2761 struct net *net = sock_net(sk);
26b15dad 2762 struct km_event c;
8be987d7 2763 int err, err2;
1da177e4 2764
2e71029e 2765 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
138437f5
HL		 2766 if (!err)
2767 xfrm_garbage_collect(net);
8be987d7 2768 err2 = unicast_flush_resp(sk, hdr);
2f1eb65f
JHS		 2769 if (err || err2) {
2770 if (err == -ESRCH) /* empty table - old silent behavior */
2771 return 0;
2772 return err;
2773 }
8be987d7 2774
f7b6983f 2775 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2776 c.event = XFRM_MSG_FLUSHPOLICY;
15e47304 2777 c.portid = hdr->sadb_msg_pid;
26b15dad 2778 c.seq = hdr->sadb_msg_seq;
07fb0f17 2779 c.net = net;
26b15dad 2780 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2781
2782 return 0;
2783}
2784
2785typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2786 const struct sadb_msg *hdr, void * const *ext_hdrs);
8603b955 2787static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
1da177e4
LT		 2788 [SADB_RESERVED] = pfkey_reserved,
2789 [SADB_GETSPI] = pfkey_getspi,
2790 [SADB_UPDATE] = pfkey_add,
2791 [SADB_ADD] = pfkey_add,
2792 [SADB_DELETE] = pfkey_delete,
2793 [SADB_GET] = pfkey_get,
2794 [SADB_ACQUIRE] = pfkey_acquire,
2795 [SADB_REGISTER] = pfkey_register,
2796 [SADB_EXPIRE] = NULL,
2797 [SADB_FLUSH] = pfkey_flush,
2798 [SADB_DUMP] = pfkey_dump,
2799 [SADB_X_PROMISC] = pfkey_promisc,
2800 [SADB_X_PCHANGE] = NULL,
2801 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2802 [SADB_X_SPDADD] = pfkey_spdadd,
2803 [SADB_X_SPDDELETE] = pfkey_spddelete,
2804 [SADB_X_SPDGET] = pfkey_spdget,
2805 [SADB_X_SPDACQUIRE] = NULL,
2806 [SADB_X_SPDDUMP] = pfkey_spddump,
2807 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2808 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2809 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2810 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2811};
2812
4c93fbb0 2813static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
1da177e4
LT		 2814{
2815 void *ext_hdrs[SADB_EXT_MAX];
2816 int err;
2817
ba51b6be 2818 pfkey_broadcast(skb_clone(skb, GFP_KERNEL),
07fb0f17 2819 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
1da177e4
LT		 2820
2821 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2822 err = parse_exthdrs(skb, hdr, ext_hdrs);
2823 if (!err) {
2824 err = -EOPNOTSUPP;
2825 if (pfkey_funcs[hdr->sadb_msg_type])
2826 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2827 }
2828 return err;
2829}
2830
2831static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2832{
2833 struct sadb_msg *hdr = NULL;
2834
2835 if (skb->len < sizeof(*hdr)) {
2836 *errp = -EMSGSIZE;
2837 } else {
2838 hdr = (struct sadb_msg *) skb->data;
2839 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2840 hdr->sadb_msg_reserved != 0 ||
2841 (hdr->sadb_msg_type <= SADB_RESERVED ||
2842 hdr->sadb_msg_type > SADB_MAX)) {
2843 hdr = NULL;
2844 *errp = -EINVAL;
2845 } else if (hdr->sadb_msg_len != (skb->len /
2846 sizeof(uint64_t)) ||
2847 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2848 sizeof(uint64_t))) {
2849 hdr = NULL;
2850 *errp = -EMSGSIZE;
2851 } else {
2852 *errp = 0;
2853 }
2854 }
2855 return hdr;
2856}
2857
4c93fbb0
DM		 2858static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2859 const struct xfrm_algo_desc *d)
1da177e4 2860{
f398035f
HX		 2861 unsigned int id = d->desc.sadb_alg_id;
2862
2863 if (id >= sizeof(t->aalgos) * 8)
2864 return 0;
2865
2866 return (t->aalgos >> id) & 1;
1da177e4
LT		 2867}
2868
4c93fbb0
DM		 2869static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2870 const struct xfrm_algo_desc *d)
1da177e4 2871{
f398035f
HX		 2872 unsigned int id = d->desc.sadb_alg_id;
2873
2874 if (id >= sizeof(t->ealgos) * 8)
2875 return 0;
2876
2877 return (t->ealgos >> id) & 1;
1da177e4
LT		 2878}
2879
4c93fbb0 2880static int count_ah_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2881{
2882 int i, sz = 0;
2883
2884 for (i = 0; ; i++) {
4c93fbb0 2885 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2886 if (!aalg)
2887 break;
7e50f84c
JK		 2888 if (!aalg->pfkey_supported)
2889 continue;
1da177e4
LT		 2890 if (aalg_tmpl_set(t, aalg) && aalg->available)
2891 sz += sizeof(struct sadb_comb);
2892 }
2893 return sz + sizeof(struct sadb_prop);
2894}
2895
4c93fbb0 2896static int count_esp_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2897{
2898 int i, k, sz = 0;
2899
2900 for (i = 0; ; i++) {
4c93fbb0 2901 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2902 if (!ealg)
2903 break;
8ff24541 2904
7e50f84c
JK		 2905 if (!ealg->pfkey_supported)
2906 continue;
2907
1da177e4
LT		 2908 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2909 continue;
8ff24541 2910
1da177e4 2911 for (k = 1; ; k++) {
4c93fbb0 2912 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2913 if (!aalg)
2914 break;
8ff24541 2915
7e50f84c
JK		 2916 if (!aalg->pfkey_supported)
2917 continue;
2918
1da177e4
LT		 2919 if (aalg_tmpl_set(t, aalg) && aalg->available)
2920 sz += sizeof(struct sadb_comb);
2921 }
2922 }
2923 return sz + sizeof(struct sadb_prop);
2924}
2925
4c93fbb0 2926static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2927{
2928 struct sadb_prop *p;
2929 int i;
2930
2931 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2932 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2933 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2934 p->sadb_prop_replay = 32;
2935 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2936
2937 for (i = 0; ; i++) {
4c93fbb0 2938 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2939 if (!aalg)
2940 break;
2941
7e50f84c
JK		 2942 if (!aalg->pfkey_supported)
2943 continue;
2944
1da177e4
LT		 2945 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2946 struct sadb_comb *c;
2947 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2948 memset(c, 0, sizeof(*c));
2949 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2950 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2951 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2952 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2953 c->sadb_comb_hard_addtime = 24*60*60;
2954 c->sadb_comb_soft_addtime = 20*60*60;
2955 c->sadb_comb_hard_usetime = 8*60*60;
2956 c->sadb_comb_soft_usetime = 7*60*60;
2957 }
2958 }
2959}
2960
4c93fbb0 2961static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2962{
2963 struct sadb_prop *p;
2964 int i, k;
2965
2966 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2967 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2968 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2969 p->sadb_prop_replay = 32;
2970 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2971
2972 for (i=0; ; i++) {
4c93fbb0 2973 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2974 if (!ealg)
2975 break;
8ff24541 2976
7e50f84c
JK		 2977 if (!ealg->pfkey_supported)
2978 continue;
2979
1da177e4
LT		 2980 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2981 continue;
8ff24541 2982
1da177e4
LT		 2983 for (k = 1; ; k++) {
2984 struct sadb_comb *c;
4c93fbb0 2985 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2986 if (!aalg)
2987 break;
7e50f84c
JK		 2988 if (!aalg->pfkey_supported)
2989 continue;
1da177e4
LT		 2990 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2991 continue;
2992 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2993 memset(c, 0, sizeof(*c));
2994 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2995 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2996 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2997 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2998 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2999 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
3000 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
3001 c->sadb_comb_hard_addtime = 24*60*60;
3002 c->sadb_comb_soft_addtime = 20*60*60;
3003 c->sadb_comb_hard_usetime = 8*60*60;
3004 c->sadb_comb_soft_usetime = 7*60*60;
3005 }
3006 }
3007}
3008
214e005b 3009static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
26b15dad
JHS		 3010{
3011 return 0;
3012}
3013
214e005b 3014static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 3015{
3016 struct sk_buff *out_skb;
3017 struct sadb_msg *out_hdr;
26b15dad
JHS		 3018 int hard;
3019 int hsc;
3020
bf08867f 3021 hard = c->data.hard;
26b15dad
JHS		 3022 if (hard)
3023 hsc = 2;
3024 else
3025 hsc = 1;
1da177e4 3026
050f009e 3027 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 3028 if (IS_ERR(out_skb))
3029 return PTR_ERR(out_skb);
3030
3031 out_hdr = (struct sadb_msg *) out_skb->data;
3032 out_hdr->sadb_msg_version = PF_KEY_V2;
3033 out_hdr->sadb_msg_type = SADB_EXPIRE;
3034 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3035 out_hdr->sadb_msg_errno = 0;
3036 out_hdr->sadb_msg_reserved = 0;
3037 out_hdr->sadb_msg_seq = 0;
3038 out_hdr->sadb_msg_pid = 0;
3039
ba51b6be 3040 pfkey_broadcast(out_skb, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3041 return 0;
3042}
3043
214e005b 3044static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad 3045{
07fb0f17 3046 struct net *net = x ? xs_net(x) : c->net;
3fa87a32
AD		 3047 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3048
3049 if (atomic_read(&net_pfkey->socks_nr) == 0)
99c6f60e
JHS		 3050 return 0;
3051
26b15dad 3052 switch (c->event) {
f60f6b8f 3053 case XFRM_MSG_EXPIRE:
26b15dad 3054 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 3055 case XFRM_MSG_DELSA:
3056 case XFRM_MSG_NEWSA:
3057 case XFRM_MSG_UPDSA:
26b15dad 3058 return key_notify_sa(x, c);
f60f6b8f 3059 case XFRM_MSG_FLUSHSA:
26b15dad 3060 return key_notify_sa_flush(c);
d51d081d
JHS		 3061 case XFRM_MSG_NEWAE: /* not yet supported */
3062 break;
26b15dad 3063 default:
207024b9 3064 pr_err("pfkey: Unknown SA event %d\n", c->event);
26b15dad
JHS		 3065 break;
3066 }
3067
3068 return 0;
3069}
3070
214e005b 3071static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 3072{
f7b6983f
MN		 3073 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3074 return 0;
3075
26b15dad 3076 switch (c->event) {
f60f6b8f 3077 case XFRM_MSG_POLEXPIRE:
26b15dad 3078 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 3079 case XFRM_MSG_DELPOLICY:
3080 case XFRM_MSG_NEWPOLICY:
3081 case XFRM_MSG_UPDPOLICY:
26b15dad 3082 return key_notify_policy(xp, dir, c);
f60f6b8f 3083 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 3084 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3085 break;
26b15dad
JHS		 3086 return key_notify_policy_flush(c);
3087 default:
207024b9 3088 pr_err("pfkey: Unknown policy event %d\n", c->event);
26b15dad
JHS		 3089 break;
3090 }
3091
3092 return 0;
3093}
3094
1da177e4
LT		 3095static u32 get_acqseq(void)
3096{
3097 u32 res;
28aecb9d 3098 static atomic_t acqseq;
1da177e4 3099
28aecb9d
ED		 3100 do {
3101 res = atomic_inc_return(&acqseq);
3102 } while (!res);
1da177e4
LT		 3103 return res;
3104}
3105
0f24558e
HG		 3106static bool pfkey_is_alive(const struct km_event *c)
3107{
3108 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3109 struct sock *sk;
3110 bool is_alive = false;
3111
3112 rcu_read_lock();
3113 sk_for_each_rcu(sk, &net_pfkey->table) {
3114 if (pfkey_sk(sk)->registered) {
3115 is_alive = true;
3116 break;
3117 }
3118 }
3119 rcu_read_unlock();
3120
3121 return is_alive;
3122}
3123
65e0736b 3124static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
1da177e4
LT		 3125{
3126 struct sk_buff *skb;
3127 struct sadb_msg *hdr;
3128 struct sadb_address *addr;
3129 struct sadb_x_policy *pol;
1da177e4
LT		 3130 int sockaddr_size;
3131 int size;
4e2ba18e
VY		 3132 struct sadb_x_sec_ctx *sec_ctx;
3133 struct xfrm_sec_ctx *xfrm_ctx;
3134 int ctx_size = 0;
8ff24541 3135
1da177e4
LT		 3136 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3137 if (!sockaddr_size)
3138 return -EINVAL;
3139
3140 size = sizeof(struct sadb_msg) +
3141 (sizeof(struct sadb_address) * 2) +
3142 (sockaddr_size * 2) +
3143 sizeof(struct sadb_x_policy);
8ff24541 3144
1da177e4
LT		 3145 if (x->id.proto == IPPROTO_AH)
3146 size += count_ah_combs(t);
3147 else if (x->id.proto == IPPROTO_ESP)
3148 size += count_esp_combs(t);
3149
4e2ba18e
VY		 3150 if ((xfrm_ctx = x->security)) {
3151 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3152 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3153 }
3154
1da177e4
LT		 3155 skb = alloc_skb(size + 16, GFP_ATOMIC);
3156 if (skb == NULL)
3157 return -ENOMEM;
8ff24541 3158
1da177e4
LT		 3159 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3160 hdr->sadb_msg_version = PF_KEY_V2;
3161 hdr->sadb_msg_type = SADB_ACQUIRE;
3162 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3163 hdr->sadb_msg_len = size / sizeof(uint64_t);
3164 hdr->sadb_msg_errno = 0;
3165 hdr->sadb_msg_reserved = 0;
3166 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3167 hdr->sadb_msg_pid = 0;
3168
3169 /* src address */
8ff24541 3170 addr = (struct sadb_address*) skb_put(skb,
1da177e4 3171 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3172 addr->sadb_address_len =
1da177e4
LT		 3173 (sizeof(struct sadb_address)+sockaddr_size)/
3174 sizeof(uint64_t);
3175 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3176 addr->sadb_address_proto = 0;
3177 addr->sadb_address_reserved = 0;
e5b56652
YH		 3178 addr->sadb_address_prefixlen =
3179 pfkey_sockaddr_fill(&x->props.saddr, 0,
3180 (struct sockaddr *) (addr + 1),
3181 x->props.family);
3182 if (!addr->sadb_address_prefixlen)
1da177e4 3183 BUG();
8ff24541 3184
1da177e4 3185 /* dst address */
8ff24541 3186 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 3187 sizeof(struct sadb_address)+sockaddr_size);
3188 addr->sadb_address_len =
3189 (sizeof(struct sadb_address)+sockaddr_size)/
3190 sizeof(uint64_t);
3191 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3192 addr->sadb_address_proto = 0;
3193 addr->sadb_address_reserved = 0;
e5b56652
YH		 3194 addr->sadb_address_prefixlen =
3195 pfkey_sockaddr_fill(&x->id.daddr, 0,
3196 (struct sockaddr *) (addr + 1),
3197 x->props.family);
3198 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3199 BUG();
3200
3201 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3202 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3203 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3204 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
65e0736b 3205 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
ff862a46 3206 pol->sadb_x_policy_reserved = 0;
1da177e4 3207 pol->sadb_x_policy_id = xp->index;
ff862a46 3208 pol->sadb_x_policy_priority = xp->priority;
1da177e4
LT		 3209
3210 /* Set sadb_comb's. */
3211 if (x->id.proto == IPPROTO_AH)
3212 dump_ah_combs(skb, t);
3213 else if (x->id.proto == IPPROTO_ESP)
3214 dump_esp_combs(skb, t);
3215
4e2ba18e
VY		 3216 /* security context */
3217 if (xfrm_ctx) {
3218 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3219 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3220 sec_ctx->sadb_x_sec_len =
3221 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3222 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3223 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3224 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3225 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3226 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3227 xfrm_ctx->ctx_len);
3228 }
3229
ba51b6be 3230 return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3231}
3232
cb969f07 3233static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3234 u8 *data, int len, int *dir)
1da177e4 3235{
07fb0f17 3236 struct net *net = sock_net(sk);
1da177e4
LT		 3237 struct xfrm_policy *xp;
3238 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3239 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3240
cb969f07 3241 switch (sk->sk_family) {
1da177e4
LT		 3242 case AF_INET:
3243 if (opt != IP_IPSEC_POLICY) {
3244 *dir = -EOPNOTSUPP;
3245 return NULL;
3246 }
3247 break;
dfd56b8b 3248#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 3249 case AF_INET6:
3250 if (opt != IPV6_IPSEC_POLICY) {
3251 *dir = -EOPNOTSUPP;
3252 return NULL;
3253 }
3254 break;
3255#endif
3256 default:
3257 *dir = -EINVAL;
3258 return NULL;
3259 }
3260
3261 *dir = -EINVAL;
3262
3263 if (len < sizeof(struct sadb_x_policy) ||
3264 pol->sadb_x_policy_len*8 > len ||
3265 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3266 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3267 return NULL;
3268
07fb0f17 3269 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3270 if (xp == NULL) {
3271 *dir = -ENOBUFS;
3272 return NULL;
3273 }
3274
3275 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3276 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3277
3278 xp->lft.soft_byte_limit = XFRM_INF;
3279 xp->lft.hard_byte_limit = XFRM_INF;
3280 xp->lft.soft_packet_limit = XFRM_INF;
3281 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3282 xp->family = sk->sk_family;
1da177e4
LT		 3283
3284 xp->xfrm_nr = 0;
3285 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3286 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3287 goto out;
3288
df71837d
TJ		 3289 /* security context too */
3290 if (len >= (pol->sadb_x_policy_len*8 +
3291 sizeof(struct sadb_x_sec_ctx))) {
3292 char *p = (char *)pol;
3293 struct xfrm_user_sec_ctx *uctx;
3294
3295 p += pol->sadb_x_policy_len*8;
3296 sec_ctx = (struct sadb_x_sec_ctx *)p;
3297 if (len < pol->sadb_x_policy_len*8 +
d90c9024 3298 sec_ctx->sadb_x_sec_len*8) {
cb969f07 3299 *dir = -EINVAL;
df71837d 3300 goto out;
cb969f07 3301 }
df71837d
TJ		 3302 if ((*dir = verify_sec_ctx_len(p)))
3303 goto out;
87536a81 3304 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
52a4c640 3305 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
df71837d
TJ		 3306 kfree(uctx);
3307
3308 if (*dir)
3309 goto out;
3310 }
3311
1da177e4
LT		 3312 *dir = pol->sadb_x_policy_dir-1;
3313 return xp;
3314
3315out:
70e90679 3316 xp->walk.dead = 1;
64c31b3f 3317 xfrm_policy_destroy(xp);
1da177e4
LT		 3318 return NULL;
3319}
3320
5d36b180 3321static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3322{
3323 struct sk_buff *skb;
3324 struct sadb_msg *hdr;
3325 struct sadb_sa *sa;
3326 struct sadb_address *addr;
3327 struct sadb_x_nat_t_port *n_port;
1da177e4
LT		 3328 int sockaddr_size;
3329 int size;
3330 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3331 struct xfrm_encap_tmpl *natt = NULL;
3332
3333 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3334 if (!sockaddr_size)
3335 return -EINVAL;
3336
3337 if (!satype)
3338 return -EINVAL;
3339
3340 if (!x->encap)
3341 return -EINVAL;
3342
3343 natt = x->encap;
3344
3345 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3346 *
3347 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3348 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3349 */
8ff24541 3350
1da177e4
LT		 3351 size = sizeof(struct sadb_msg) +
3352 sizeof(struct sadb_sa) +
3353 (sizeof(struct sadb_address) * 2) +
3354 (sockaddr_size * 2) +
3355 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3356
1da177e4
LT		 3357 skb = alloc_skb(size + 16, GFP_ATOMIC);
3358 if (skb == NULL)
3359 return -ENOMEM;
8ff24541 3360
1da177e4
LT		 3361 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3362 hdr->sadb_msg_version = PF_KEY_V2;
3363 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3364 hdr->sadb_msg_satype = satype;
3365 hdr->sadb_msg_len = size / sizeof(uint64_t);
3366 hdr->sadb_msg_errno = 0;
3367 hdr->sadb_msg_reserved = 0;
3368 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3369 hdr->sadb_msg_pid = 0;
3370
3371 /* SA */
3372 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3373 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3374 sa->sadb_sa_exttype = SADB_EXT_SA;
3375 sa->sadb_sa_spi = x->id.spi;
3376 sa->sadb_sa_replay = 0;
3377 sa->sadb_sa_state = 0;
3378 sa->sadb_sa_auth = 0;
3379 sa->sadb_sa_encrypt = 0;
3380 sa->sadb_sa_flags = 0;
3381
3382 /* ADDRESS_SRC (old addr) */
3383 addr = (struct sadb_address*)
3384 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3385 addr->sadb_address_len =
1da177e4
LT		 3386 (sizeof(struct sadb_address)+sockaddr_size)/
3387 sizeof(uint64_t);
3388 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3389 addr->sadb_address_proto = 0;
3390 addr->sadb_address_reserved = 0;
e5b56652
YH		 3391 addr->sadb_address_prefixlen =
3392 pfkey_sockaddr_fill(&x->props.saddr, 0,
3393 (struct sockaddr *) (addr + 1),
3394 x->props.family);
3395 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3396 BUG();
3397
3398 /* NAT_T_SPORT (old port) */
3399 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3400 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3401 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3402 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3403 n_port->sadb_x_nat_t_port_reserved = 0;
3404
3405 /* ADDRESS_DST (new addr) */
3406 addr = (struct sadb_address*)
3407 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3408 addr->sadb_address_len =
1da177e4
LT		 3409 (sizeof(struct sadb_address)+sockaddr_size)/
3410 sizeof(uint64_t);
3411 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3412 addr->sadb_address_proto = 0;
3413 addr->sadb_address_reserved = 0;
e5b56652
YH		 3414 addr->sadb_address_prefixlen =
3415 pfkey_sockaddr_fill(ipaddr, 0,
3416 (struct sockaddr *) (addr + 1),
3417 x->props.family);
3418 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3419 BUG();
3420
3421 /* NAT_T_DPORT (new port) */
3422 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3423 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3424 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3425 n_port->sadb_x_nat_t_port_port = sport;
3426 n_port->sadb_x_nat_t_port_reserved = 0;
3427
ba51b6be 3428 return pfkey_broadcast(skb, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3429}
3430
08de61be
SS		 3431#ifdef CONFIG_NET_KEY_MIGRATE
3432static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
183cad12 3433 const struct xfrm_selector *sel)
08de61be
SS		 3434{
3435 struct sadb_address *addr;
08de61be
SS		 3436 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3437 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3438 addr->sadb_address_exttype = type;
3439 addr->sadb_address_proto = sel->proto;
3440 addr->sadb_address_reserved = 0;
3441
3442 switch (type) {
3443 case SADB_EXT_ADDRESS_SRC:
e5b56652
YH		 3444 addr->sadb_address_prefixlen = sel->prefixlen_s;
3445 pfkey_sockaddr_fill(&sel->saddr, 0,
3446 (struct sockaddr *)(addr + 1),
3447 sel->family);
08de61be
SS		 3448 break;
3449 case SADB_EXT_ADDRESS_DST:
e5b56652
YH		 3450 addr->sadb_address_prefixlen = sel->prefixlen_d;
3451 pfkey_sockaddr_fill(&sel->daddr, 0,
3452 (struct sockaddr *)(addr + 1),
3453 sel->family);
08de61be
SS		 3454 break;
3455 default:
3456 return -EINVAL;
3457 }
3458
3459 return 0;
3460}
3461
13c1d189 3462
183cad12 3463static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
13c1d189
AE		 3464{
3465 struct sadb_x_kmaddress *kma;
3466 u8 *sa;
3467 int family = k->family;
3468 int socklen = pfkey_sockaddr_len(family);
3469 int size_req;
3470
3471 size_req = (sizeof(struct sadb_x_kmaddress) +
3472 pfkey_sockaddr_pair_size(family));
3473
3474 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3475 memset(kma, 0, size_req);
3476 kma->sadb_x_kmaddress_len = size_req / 8;
3477 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3478 kma->sadb_x_kmaddress_reserved = k->reserved;
3479
3480 sa = (u8 *)(kma + 1);
3481 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3482 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3483 return -EINVAL;
3484
3485 return 0;
3486}
3487
08de61be
SS		 3488static int set_ipsecrequest(struct sk_buff *skb,
3489 uint8_t proto, uint8_t mode, int level,
3490 uint32_t reqid, uint8_t family,
183cad12 3491 const xfrm_address_t *src, const xfrm_address_t *dst)
08de61be
SS		 3492{
3493 struct sadb_x_ipsecrequest *rq;
e5b56652
YH		 3494 u8 *sa;
3495 int socklen = pfkey_sockaddr_len(family);
08de61be
SS		 3496 int size_req;
3497
3498 size_req = sizeof(struct sadb_x_ipsecrequest) +
3499 pfkey_sockaddr_pair_size(family);
3500
3501 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3502 memset(rq, 0, size_req);
3503 rq->sadb_x_ipsecrequest_len = size_req;
3504 rq->sadb_x_ipsecrequest_proto = proto;
3505 rq->sadb_x_ipsecrequest_mode = mode;
3506 rq->sadb_x_ipsecrequest_level = level;
3507 rq->sadb_x_ipsecrequest_reqid = reqid;
3508
e5b56652
YH		 3509 sa = (u8 *) (rq + 1);
3510 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3511 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
08de61be 3512 return -EINVAL;
08de61be
SS		 3513
3514 return 0;
3515}
3516#endif
3517
3518#ifdef CONFIG_NET_KEY_MIGRATE
183cad12
DM		 3519static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3520 const struct xfrm_migrate *m, int num_bundles,
3521 const struct xfrm_kmaddress *k)
08de61be
SS		 3522{
3523 int i;
3524 int sasize_sel;
3525 int size = 0;
3526 int size_pol = 0;
3527 struct sk_buff *skb;
3528 struct sadb_msg *hdr;
3529 struct sadb_x_policy *pol;
183cad12 3530 const struct xfrm_migrate *mp;
08de61be
SS		 3531
3532 if (type != XFRM_POLICY_TYPE_MAIN)
3533 return 0;
3534
3535 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3536 return -EINVAL;
3537
13c1d189
AE		 3538 if (k != NULL) {
3539 /* addresses for KM */
3540 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3541 pfkey_sockaddr_pair_size(k->family));
3542 }
3543
08de61be
SS		 3544 /* selector */
3545 sasize_sel = pfkey_sockaddr_size(sel->family);
3546 if (!sasize_sel)
3547 return -EINVAL;
3548 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3549
3550 /* policy info */
3551 size_pol += sizeof(struct sadb_x_policy);
3552
3553 /* ipsecrequests */
3554 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3555 /* old locator pair */
3556 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3557 pfkey_sockaddr_pair_size(mp->old_family);
3558 /* new locator pair */
3559 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3560 pfkey_sockaddr_pair_size(mp->new_family);
3561 }
3562
3563 size += sizeof(struct sadb_msg) + size_pol;
3564
3565 /* alloc buffer */
3566 skb = alloc_skb(size, GFP_ATOMIC);
3567 if (skb == NULL)
3568 return -ENOMEM;
3569
3570 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3571 hdr->sadb_msg_version = PF_KEY_V2;
3572 hdr->sadb_msg_type = SADB_X_MIGRATE;
3573 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3574 hdr->sadb_msg_len = size / 8;
3575 hdr->sadb_msg_errno = 0;
3576 hdr->sadb_msg_reserved = 0;
3577 hdr->sadb_msg_seq = 0;
3578 hdr->sadb_msg_pid = 0;
3579
13c1d189
AE		 3580 /* Addresses to be used by KM for negotiation, if ext is available */
3581 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
89eb06f1 3582 goto err;
13c1d189 3583
08de61be
SS		 3584 /* selector src */
3585 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3586
3587 /* selector dst */
3588 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3589
3590 /* policy information */
3591 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3592 pol->sadb_x_policy_len = size_pol / 8;
3593 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3594 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3595 pol->sadb_x_policy_dir = dir + 1;
ff862a46 3596 pol->sadb_x_policy_reserved = 0;
08de61be
SS		 3597 pol->sadb_x_policy_id = 0;
3598 pol->sadb_x_policy_priority = 0;
3599
3600 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3601 /* old ipsecrequest */
55569ce2
KM		 3602 int mode = pfkey_mode_from_xfrm(mp->mode);
3603 if (mode < 0)
d4782c32 3604 goto err;
55569ce2 3605 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3606 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3607 mp->reqid, mp->old_family,
d4782c32
PM		 3608 &mp->old_saddr, &mp->old_daddr) < 0)
3609 goto err;
08de61be
SS		 3610
3611 /* new ipsecrequest */
55569ce2 3612 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3613 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3614 mp->reqid, mp->new_family,
d4782c32
PM		 3615 &mp->new_saddr, &mp->new_daddr) < 0)
3616 goto err;
08de61be
SS		 3617 }
3618
3619 /* broadcast migrate message to sockets */
ba51b6be 3620 pfkey_broadcast(skb, BROADCAST_ALL, NULL, &init_net);
08de61be
SS		 3621
3622 return 0;
d4782c32
PM		 3623
3624err:
3625 kfree_skb(skb);
3626 return -EINVAL;
08de61be
SS		 3627}
3628#else
183cad12
DM		 3629static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3630 const struct xfrm_migrate *m, int num_bundles,
3631 const struct xfrm_kmaddress *k)
08de61be
SS		 3632{
3633 return -ENOPROTOOPT;
3634}
3635#endif
3636
1b784140 3637static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4
LT		 3638{
3639 struct sock *sk = sock->sk;
3640 struct sk_buff *skb = NULL;
3641 struct sadb_msg *hdr = NULL;
3642 int err;
283bc9f3 3643 struct net *net = sock_net(sk);
1da177e4
LT		 3644
3645 err = -EOPNOTSUPP;
3646 if (msg->msg_flags & MSG_OOB)
3647 goto out;
3648
3649 err = -EMSGSIZE;
95c96174 3650 if ((unsigned int)len > sk->sk_sndbuf - 32)
1da177e4
LT		 3651 goto out;
3652
3653 err = -ENOBUFS;
3654 skb = alloc_skb(len, GFP_KERNEL);
3655 if (skb == NULL)
3656 goto out;
3657
3658 err = -EFAULT;
6ce8e9ce 3659 if (memcpy_from_msg(skb_put(skb,len), msg, len))
1da177e4
LT		 3660 goto out;
3661
3662 hdr = pfkey_get_base_msg(skb, &err);
3663 if (!hdr)
3664 goto out;
3665
283bc9f3 3666 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
1da177e4 3667 err = pfkey_process(sk, skb, hdr);
283bc9f3 3668 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 3669
3670out:
3671 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3672 err = 0;
6f961068 3673 kfree_skb(skb);
1da177e4
LT		 3674
3675 return err ? : len;
3676}
3677
1b784140 3678static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
1da177e4
LT		 3679 int flags)
3680{
3681 struct sock *sk = sock->sk;
83321d6b 3682 struct pfkey_sock *pfk = pfkey_sk(sk);
1da177e4
LT		 3683 struct sk_buff *skb;
3684 int copied, err;
3685
3686 err = -EINVAL;
3687 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3688 goto out;
3689
1da177e4
LT		 3690 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3691 if (skb == NULL)
3692 goto out;
3693
3694 copied = skb->len;
3695 if (copied > len) {
3696 msg->msg_flags |= MSG_TRUNC;
3697 copied = len;
3698 }
3699
badff6d0 3700 skb_reset_transport_header(skb);
51f3d02b 3701 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4
LT		 3702 if (err)
3703 goto out_free;
3704
3b885787 3705 sock_recv_ts_and_drops(msg, sk, skb);
1da177e4
LT		 3706
3707 err = (flags & MSG_TRUNC) ? skb->len : copied;
3708
83321d6b
TT		 3709 if (pfk->dump.dump != NULL &&
3710 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3711 pfkey_do_dump(pfk);
3712
1da177e4
LT		 3713out_free:
3714 skb_free_datagram(sk, skb);
3715out:
3716 return err;
3717}
3718
90ddc4f0 3719static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3720 .family = PF_KEY,
3721 .owner = THIS_MODULE,
3722 /* Operations that make no sense on pfkey sockets. */
3723 .bind = sock_no_bind,
3724 .connect = sock_no_connect,
3725 .socketpair = sock_no_socketpair,
3726 .accept = sock_no_accept,
3727 .getname = sock_no_getname,
3728 .ioctl = sock_no_ioctl,
3729 .listen = sock_no_listen,
3730 .shutdown = sock_no_shutdown,
3731 .setsockopt = sock_no_setsockopt,
3732 .getsockopt = sock_no_getsockopt,
3733 .mmap = sock_no_mmap,
3734 .sendpage = sock_no_sendpage,
3735
3736 /* Now the operations that really occur. */
3737 .release = pfkey_release,
3738 .poll = datagram_poll,
3739 .sendmsg = pfkey_sendmsg,
3740 .recvmsg = pfkey_recvmsg,
3741};
3742
ec1b4cf7 3743static const struct net_proto_family pfkey_family_ops = {
1da177e4
LT		 3744 .family = PF_KEY,
3745 .create = pfkey_create,
3746 .owner = THIS_MODULE,
3747};
3748
3749#ifdef CONFIG_PROC_FS
bd2f7476 3750static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3751{
27b5b865 3752 struct sock *s = sk_entry(v);
1da177e4 3753
bd2f7476
PE		 3754 if (v == SEQ_START_TOKEN)
3755 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3756 else
71338aa7 3757 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4
LT		 3758 s,
3759 atomic_read(&s->sk_refcnt),
31e6d363
ED		 3760 sk_rmem_alloc_get(s),
3761 sk_wmem_alloc_get(s),
a7cb5a49 3762 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
1da177e4
LT		 3763 sock_i_ino(s)
3764 );
bd2f7476
PE		 3765 return 0;
3766}
3767
3768static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
ada440e3 3769 __acquires(rcu)
bd2f7476 3770{
7013ec30 3771 struct net *net = seq_file_net(f);
3fa87a32 3772 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 3773
7f6b9dbd 3774 rcu_read_lock();
3775 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
bd2f7476
PE		 3776}
3777
3778static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3779{
7013ec30 3780 struct net *net = seq_file_net(f);
3fa87a32
AD		 3781 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3782
7f6b9dbd 3783 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
bd2f7476 3784}
1da177e4 3785
bd2f7476 3786static void pfkey_seq_stop(struct seq_file *f, void *v)
ada440e3 3787 __releases(rcu)
bd2f7476 3788{
7f6b9dbd 3789 rcu_read_unlock();
bd2f7476 3790}
1da177e4 3791
98147d52 3792static const struct seq_operations pfkey_seq_ops = {
bd2f7476
PE		 3793 .start = pfkey_seq_start,
3794 .next = pfkey_seq_next,
3795 .stop = pfkey_seq_stop,
3796 .show = pfkey_seq_show,
3797};
1da177e4 3798
bd2f7476
PE		 3799static int pfkey_seq_open(struct inode *inode, struct file *file)
3800{
7013ec30
AD		 3801 return seq_open_net(inode, file, &pfkey_seq_ops,
3802 sizeof(struct seq_net_private));
1da177e4 3803}
61145aa1 3804
5ca1b998 3805static const struct file_operations pfkey_proc_ops = {
bd2f7476
PE		 3806 .open = pfkey_seq_open,
3807 .read = seq_read,
3808 .llseek = seq_lseek,
7013ec30 3809 .release = seq_release_net,
bd2f7476
PE		 3810};
3811
7013ec30 3812static int __net_init pfkey_init_proc(struct net *net)
61145aa1 3813{
bd2f7476
PE		 3814 struct proc_dir_entry *e;
3815
d4beaa66 3816 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
bd2f7476 3817 if (e == NULL)
61145aa1 3818 return -ENOMEM;
bd2f7476 3819
bd2f7476 3820 return 0;
61145aa1
PE		 3821}
3822
2c8c1e72 3823static void __net_exit pfkey_exit_proc(struct net *net)
61145aa1 3824{
ece31ffd 3825 remove_proc_entry("pfkey", net->proc_net);
61145aa1
PE		 3826}
3827#else
2c8c1e72 3828static inline int pfkey_init_proc(struct net *net)
61145aa1
PE		 3829{
3830 return 0;
3831}
3832
2c8c1e72 3833static inline void pfkey_exit_proc(struct net *net)
61145aa1
PE		 3834{
3835}
1da177e4
LT		 3836#endif
3837
3838static struct xfrm_mgr pfkeyv2_mgr =
3839{
1da177e4
LT		 3840 .notify = pfkey_send_notify,
3841 .acquire = pfkey_send_acquire,
3842 .compile_policy = pfkey_compile_policy,
3843 .new_mapping = pfkey_send_new_mapping,
26b15dad 3844 .notify_policy = pfkey_send_policy_notify,
08de61be 3845 .migrate = pfkey_send_migrate,
0f24558e 3846 .is_alive = pfkey_is_alive,
1da177e4
LT		 3847};
3848
3fa87a32
AD		 3849static int __net_init pfkey_net_init(struct net *net)
3850{
23c049ca 3851 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3fa87a32
AD		 3852 int rv;
3853
3fa87a32
AD		 3854 INIT_HLIST_HEAD(&net_pfkey->table);
3855 atomic_set(&net_pfkey->socks_nr, 0);
23c049ca 3856
7013ec30 3857 rv = pfkey_init_proc(net);
3fa87a32 3858
3fa87a32
AD		 3859 return rv;
3860}
3861
3862static void __net_exit pfkey_net_exit(struct net *net)
3863{
3864 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3865
7013ec30 3866 pfkey_exit_proc(net);
3fa87a32 3867 BUG_ON(!hlist_empty(&net_pfkey->table));
3fa87a32
AD		 3868}
3869
3870static struct pernet_operations pfkey_net_ops = {
3871 .init = pfkey_net_init,
3872 .exit = pfkey_net_exit,
23c049ca
EB		 3873 .id = &pfkey_net_id,
3874 .size = sizeof(struct netns_pfkey),
3fa87a32
AD		 3875};
3876
1da177e4
LT		 3877static void __exit ipsec_pfkey_exit(void)
3878{
3879 xfrm_unregister_km(&pfkeyv2_mgr);
1da177e4 3880 sock_unregister(PF_KEY);
180211b8 3881 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3882 proto_unregister(&key_proto);
3883}
3884
3885static int __init ipsec_pfkey_init(void)
3886{
3887 int err = proto_register(&key_proto, 0);
3888
3889 if (err != 0)
3890 goto out;
3891
180211b8 3892 err = register_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3893 if (err != 0)
3894 goto out_unregister_key_proto;
180211b8
AD		 3895 err = sock_register(&pfkey_family_ops);
3896 if (err != 0)
3897 goto out_unregister_pernet;
1da177e4
LT		 3898 err = xfrm_register_km(&pfkeyv2_mgr);
3899 if (err != 0)
7013ec30 3900 goto out_sock_unregister;
1da177e4
LT		 3901out:
3902 return err;
180211b8 3903
1da177e4 3904out_sock_unregister:
1da177e4 3905 sock_unregister(PF_KEY);
180211b8
AD		 3906out_unregister_pernet:
3907 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3908out_unregister_key_proto:
3909 proto_unregister(&key_proto);
3910 goto out;
3911}
3912
3913module_init(ipsec_pfkey_init);
3914module_exit(ipsec_pfkey_exit);
3915MODULE_LICENSE("GPL");
3916MODULE_ALIAS_NETPROTO(PF_KEY);
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