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