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xfrm: Remove caching of xfrm_policy_sk_bundles
[deliverable/linux.git] / net / key / af_key.c
CommitLineData
1da177e4
LT		 1/*
2 * net/key/af_key.c An implementation of PF_KEYv2 sockets.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Maxim Giryaev <gem@asplinux.ru>
10 * David S. Miller <davem@redhat.com>
11 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
12 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
14 * Derek Atkins <derek@ihtfp.com>
15 */
16
4fc268d2 17#include <linux/capability.h>
1da177e4
LT		 18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/socket.h>
21#include <linux/pfkeyv2.h>
22#include <linux/ipsec.h>
23#include <linux/skbuff.h>
24#include <linux/rtnetlink.h>
25#include <linux/in.h>
26#include <linux/in6.h>
27#include <linux/proc_fs.h>
28#include <linux/init.h>
5a0e3ad6 29#include <linux/slab.h>
457c4cbc 30#include <net/net_namespace.h>
3fa87a32 31#include <net/netns/generic.h>
1da177e4
LT		 32#include <net/xfrm.h>
33
34#include <net/sock.h>
35
36#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
37#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
38
f99189b1 39static int pfkey_net_id __read_mostly;
3fa87a32
AD		 40struct netns_pfkey {
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
43 atomic_t socks_nr;
44};
7f6b9dbd 45static DEFINE_MUTEX(pfkey_mutex);
1da177e4 46
bd55775c 47#define DUMMY_MARK 0
e473fcb4 48static const struct xfrm_mark dummy_mark = {0, 0};
1da177e4
LT		 49struct pfkey_sock {
50 /* struct sock must be the first member of struct pfkey_sock */
51 struct sock sk;
52 int registered;
53 int promisc;
83321d6b
TT		 54
55 struct {
56 uint8_t msg_version;
15e47304 57 uint32_t msg_portid;
83321d6b
TT		 58 int (*dump)(struct pfkey_sock *sk);
59 void (*done)(struct pfkey_sock *sk);
60 union {
61 struct xfrm_policy_walk policy;
62 struct xfrm_state_walk state;
63 } u;
12a169e7 64 struct sk_buff *skb;
83321d6b 65 } dump;
1da177e4
LT		 66};
67
68static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
69{
70 return (struct pfkey_sock *)sk;
71}
72
4c93fbb0 73static int pfkey_can_dump(const struct sock *sk)
83321d6b
TT		 74{
75 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
76 return 1;
77 return 0;
78}
79
05238204 80static void pfkey_terminate_dump(struct pfkey_sock *pfk)
83321d6b 81{
05238204 82 if (pfk->dump.dump) {
12a169e7
HX		 83 if (pfk->dump.skb) {
84 kfree_skb(pfk->dump.skb);
85 pfk->dump.skb = NULL;
86 }
05238204
TT		 87 pfk->dump.done(pfk);
88 pfk->dump.dump = NULL;
89 pfk->dump.done = NULL;
90 }
83321d6b
TT		 91}
92
1da177e4
LT		 93static void pfkey_sock_destruct(struct sock *sk)
94{
3fa87a32
AD		 95 struct net *net = sock_net(sk);
96 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
97
05238204 98 pfkey_terminate_dump(pfkey_sk(sk));
1da177e4
LT		 99 skb_queue_purge(&sk->sk_receive_queue);
100
101 if (!sock_flag(sk, SOCK_DEAD)) {
207024b9 102 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
1da177e4
LT		 103 return;
104 }
105
547b792c
IJ		 106 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
107 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
1da177e4 108
3fa87a32 109 atomic_dec(&net_pfkey->socks_nr);
1da177e4
LT		 110}
111
90ddc4f0 112static const struct proto_ops pfkey_ops;
1da177e4
LT		 113
114static void pfkey_insert(struct sock *sk)
115{
3fa87a32
AD		 116 struct net *net = sock_net(sk);
117 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
118
7f6b9dbd 119 mutex_lock(&pfkey_mutex);
120 sk_add_node_rcu(sk, &net_pfkey->table);
121 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 122}
123
124static void pfkey_remove(struct sock *sk)
125{
7f6b9dbd 126 mutex_lock(&pfkey_mutex);
127 sk_del_node_init_rcu(sk);
128 mutex_unlock(&pfkey_mutex);
1da177e4
LT		 129}
130
131static struct proto key_proto = {
132 .name = "KEY",
133 .owner = THIS_MODULE,
134 .obj_size = sizeof(struct pfkey_sock),
135};
136
3f378b68
EP		 137static int pfkey_create(struct net *net, struct socket *sock, int protocol,
138 int kern)
1da177e4 139{
3fa87a32 140 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4
LT		 141 struct sock *sk;
142 int err;
143
df008c91 144 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 145 return -EPERM;
146 if (sock->type != SOCK_RAW)
147 return -ESOCKTNOSUPPORT;
148 if (protocol != PF_KEY_V2)
149 return -EPROTONOSUPPORT;
150
151 err = -ENOMEM;
6257ff21 152 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
1da177e4
LT		 153 if (sk == NULL)
154 goto out;
8ff24541 155
1da177e4
LT		 156 sock->ops = &pfkey_ops;
157 sock_init_data(sock, sk);
158
159 sk->sk_family = PF_KEY;
160 sk->sk_destruct = pfkey_sock_destruct;
161
3fa87a32 162 atomic_inc(&net_pfkey->socks_nr);
1da177e4
LT		 163
164 pfkey_insert(sk);
165
166 return 0;
167out:
168 return err;
169}
170
171static int pfkey_release(struct socket *sock)
172{
173 struct sock *sk = sock->sk;
174
175 if (!sk)
176 return 0;
177
178 pfkey_remove(sk);
179
180 sock_orphan(sk);
181 sock->sk = NULL;
182 skb_queue_purge(&sk->sk_write_queue);
7f6b9dbd 183
184 synchronize_rcu();
1da177e4
LT		 185 sock_put(sk);
186
187 return 0;
188}
189
190static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
dd0fc66f 191 gfp_t allocation, struct sock *sk)
1da177e4
LT		 192{
193 int err = -ENOBUFS;
194
195 sock_hold(sk);
196 if (*skb2 == NULL) {
197 if (atomic_read(&skb->users) != 1) {
198 *skb2 = skb_clone(skb, allocation);
199 } else {
200 *skb2 = skb;
201 atomic_inc(&skb->users);
202 }
203 }
204 if (*skb2 != NULL) {
205 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
1da177e4
LT		 206 skb_set_owner_r(*skb2, sk);
207 skb_queue_tail(&sk->sk_receive_queue, *skb2);
208 sk->sk_data_ready(sk, (*skb2)->len);
209 *skb2 = NULL;
210 err = 0;
211 }
212 }
213 sock_put(sk);
214 return err;
215}
216
217/* Send SKB to all pfkey sockets matching selected criteria. */
218#define BROADCAST_ALL 0
219#define BROADCAST_ONE 1
220#define BROADCAST_REGISTERED 2
221#define BROADCAST_PROMISC_ONLY 4
dd0fc66f 222static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
07fb0f17
AD		 223 int broadcast_flags, struct sock *one_sk,
224 struct net *net)
1da177e4 225{
3fa87a32 226 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 227 struct sock *sk;
1da177e4
LT		 228 struct sk_buff *skb2 = NULL;
229 int err = -ESRCH;
230
231 /* XXX Do we need something like netlink_overrun? I think
232 * XXX PF_KEY socket apps will not mind current behavior.
233 */
234 if (!skb)
235 return -ENOMEM;
236
7f6b9dbd 237 rcu_read_lock();
b67bfe0d 238 sk_for_each_rcu(sk, &net_pfkey->table) {
1da177e4
LT		 239 struct pfkey_sock *pfk = pfkey_sk(sk);
240 int err2;
241
242 /* Yes, it means that if you are meant to receive this
243 * pfkey message you receive it twice as promiscuous
244 * socket.
245 */
246 if (pfk->promisc)
247 pfkey_broadcast_one(skb, &skb2, allocation, sk);
248
249 /* the exact target will be processed later */
250 if (sk == one_sk)
251 continue;
252 if (broadcast_flags != BROADCAST_ALL) {
253 if (broadcast_flags & BROADCAST_PROMISC_ONLY)
254 continue;
255 if ((broadcast_flags & BROADCAST_REGISTERED) &&
256 !pfk->registered)
257 continue;
258 if (broadcast_flags & BROADCAST_ONE)
259 continue;
260 }
261
262 err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
263
264 /* Error is cleare after succecful sending to at least one
265 * registered KM */
266 if ((broadcast_flags & BROADCAST_REGISTERED) && err)
267 err = err2;
268 }
7f6b9dbd 269 rcu_read_unlock();
1da177e4
LT		 270
271 if (one_sk != NULL)
272 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
273
6f961068 274 kfree_skb(skb2);
1da177e4
LT		 275 kfree_skb(skb);
276 return err;
277}
278
05238204
TT		 279static int pfkey_do_dump(struct pfkey_sock *pfk)
280{
12a169e7 281 struct sadb_msg *hdr;
05238204
TT		 282 int rc;
283
284 rc = pfk->dump.dump(pfk);
285 if (rc == -ENOBUFS)
286 return 0;
287
12a169e7
HX		 288 if (pfk->dump.skb) {
289 if (!pfkey_can_dump(&pfk->sk))
290 return 0;
291
292 hdr = (struct sadb_msg *) pfk->dump.skb->data;
293 hdr->sadb_msg_seq = 0;
294 hdr->sadb_msg_errno = rc;
295 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 296 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 297 pfk->dump.skb = NULL;
298 }
299
05238204
TT		 300 pfkey_terminate_dump(pfk);
301 return rc;
302}
303
4c93fbb0
DM		 304static inline void pfkey_hdr_dup(struct sadb_msg *new,
305 const struct sadb_msg *orig)
1da177e4
LT		 306{
307 *new = *orig;
308}
309
4c93fbb0 310static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
1da177e4
LT		 311{
312 struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
313 struct sadb_msg *hdr;
314
315 if (!skb)
316 return -ENOBUFS;
317
318 /* Woe be to the platform trying to support PFKEY yet
319 * having normal errnos outside the 1-255 range, inclusive.
320 */
321 err = -err;
322 if (err == ERESTARTSYS ||
323 err == ERESTARTNOHAND ||
324 err == ERESTARTNOINTR)
325 err = EINTR;
326 if (err >= 512)
327 err = EINVAL;
09a62660 328 BUG_ON(err <= 0 || err >= 256);
1da177e4
LT		 329
330 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
331 pfkey_hdr_dup(hdr, orig);
332 hdr->sadb_msg_errno = (uint8_t) err;
333 hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
334 sizeof(uint64_t));
335
07fb0f17 336 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 337
338 return 0;
339}
340
8603b955 341static const u8 sadb_ext_min_len[] = {
1da177e4
LT		 342 [SADB_EXT_RESERVED] = (u8) 0,
343 [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
344 [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
345 [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
346 [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
347 [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
348 [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
349 [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
350 [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
351 [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
352 [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
353 [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
354 [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
355 [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
356 [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
357 [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
358 [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
359 [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
360 [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
361 [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
362 [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
363 [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
364 [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
365 [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
df71837d 366 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
13c1d189 367 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
1da177e4
LT		 368};
369
370/* Verify sadb_address_{len,prefixlen} against sa_family. */
4c93fbb0 371static int verify_address_len(const void *p)
1da177e4 372{
4c93fbb0
DM		 373 const struct sadb_address *sp = p;
374 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
375 const struct sockaddr_in *sin;
dfd56b8b 376#if IS_ENABLED(CONFIG_IPV6)
4c93fbb0 377 const struct sockaddr_in6 *sin6;
1da177e4
LT		 378#endif
379 int len;
380
381 switch (addr->sa_family) {
382 case AF_INET:
356f89e1 383 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
1da177e4
LT		 384 if (sp->sadb_address_len != len ||
385 sp->sadb_address_prefixlen > 32)
386 return -EINVAL;
387 break;
dfd56b8b 388#if IS_ENABLED(CONFIG_IPV6)
1da177e4 389 case AF_INET6:
356f89e1 390 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
1da177e4
LT		 391 if (sp->sadb_address_len != len ||
392 sp->sadb_address_prefixlen > 128)
393 return -EINVAL;
394 break;
395#endif
396 default:
397 /* It is user using kernel to keep track of security
398 * associations for another protocol, such as
399 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
400 * lengths.
401 *
402 * XXX Actually, association/policy database is not yet
403 * XXX able to cope with arbitrary sockaddr families.
404 * XXX When it can, remove this -EINVAL. -DaveM
405 */
406 return -EINVAL;
407 break;
3ff50b79 408 }
1da177e4
LT		 409
410 return 0;
411}
412
4c93fbb0 413static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
df71837d 414{
356f89e1
IJ		 415 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
416 sec_ctx->sadb_x_ctx_len,
417 sizeof(uint64_t));
df71837d
TJ		 418}
419
4c93fbb0 420static inline int verify_sec_ctx_len(const void *p)
df71837d 421{
4c93fbb0 422 const struct sadb_x_sec_ctx *sec_ctx = p;
298bb621 423 int len = sec_ctx->sadb_x_ctx_len;
df71837d 424
298bb621 425 if (len > PAGE_SIZE)
df71837d
TJ		 426 return -EINVAL;
427
428 len = pfkey_sec_ctx_len(sec_ctx);
429
430 if (sec_ctx->sadb_x_sec_len != len)
431 return -EINVAL;
432
433 return 0;
434}
435
4c93fbb0 436static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx)
df71837d
TJ		 437{
438 struct xfrm_user_sec_ctx *uctx = NULL;
439 int ctx_size = sec_ctx->sadb_x_ctx_len;
440
441 uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
442
443 if (!uctx)
444 return NULL;
445
446 uctx->len = pfkey_sec_ctx_len(sec_ctx);
447 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
448 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
449 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
450 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
451 memcpy(uctx + 1, sec_ctx + 1,
452 uctx->ctx_len);
453
454 return uctx;
455}
456
4c93fbb0
DM		 457static int present_and_same_family(const struct sadb_address *src,
458 const struct sadb_address *dst)
1da177e4 459{
4c93fbb0 460 const struct sockaddr *s_addr, *d_addr;
1da177e4
LT		 461
462 if (!src || !dst)
463 return 0;
464
4c93fbb0
DM		 465 s_addr = (const struct sockaddr *)(src + 1);
466 d_addr = (const struct sockaddr *)(dst + 1);
1da177e4
LT		 467 if (s_addr->sa_family != d_addr->sa_family)
468 return 0;
469 if (s_addr->sa_family != AF_INET
dfd56b8b 470#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 471 && s_addr->sa_family != AF_INET6
472#endif
473 )
474 return 0;
475
476 return 1;
477}
478
4c93fbb0 479static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
1da177e4 480{
4c93fbb0 481 const char *p = (char *) hdr;
1da177e4
LT		 482 int len = skb->len;
483
484 len -= sizeof(*hdr);
485 p += sizeof(*hdr);
486 while (len > 0) {
4c93fbb0 487 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
1da177e4
LT		 488 uint16_t ext_type;
489 int ext_len;
490
491 ext_len = ehdr->sadb_ext_len;
492 ext_len *= sizeof(uint64_t);
493 ext_type = ehdr->sadb_ext_type;
494 if (ext_len < sizeof(uint64_t) ||
495 ext_len > len ||
496 ext_type == SADB_EXT_RESERVED)
497 return -EINVAL;
498
499 if (ext_type <= SADB_EXT_MAX) {
500 int min = (int) sadb_ext_min_len[ext_type];
501 if (ext_len < min)
502 return -EINVAL;
503 if (ext_hdrs[ext_type-1] != NULL)
504 return -EINVAL;
505 if (ext_type == SADB_EXT_ADDRESS_SRC ||
506 ext_type == SADB_EXT_ADDRESS_DST ||
507 ext_type == SADB_EXT_ADDRESS_PROXY ||
508 ext_type == SADB_X_EXT_NAT_T_OA) {
509 if (verify_address_len(p))
510 return -EINVAL;
8ff24541 511 }
df71837d
TJ		 512 if (ext_type == SADB_X_EXT_SEC_CTX) {
513 if (verify_sec_ctx_len(p))
514 return -EINVAL;
515 }
4c93fbb0 516 ext_hdrs[ext_type-1] = (void *) p;
1da177e4
LT		 517 }
518 p += ext_len;
519 len -= ext_len;
520 }
521
522 return 0;
523}
524
525static uint16_t
526pfkey_satype2proto(uint8_t satype)
527{
528 switch (satype) {
529 case SADB_SATYPE_UNSPEC:
530 return IPSEC_PROTO_ANY;
531 case SADB_SATYPE_AH:
532 return IPPROTO_AH;
533 case SADB_SATYPE_ESP:
534 return IPPROTO_ESP;
535 case SADB_X_SATYPE_IPCOMP:
536 return IPPROTO_COMP;
537 break;
538 default:
539 return 0;
540 }
541 /* NOTREACHED */
542}
543
544static uint8_t
545pfkey_proto2satype(uint16_t proto)
546{
547 switch (proto) {
548 case IPPROTO_AH:
549 return SADB_SATYPE_AH;
550 case IPPROTO_ESP:
551 return SADB_SATYPE_ESP;
552 case IPPROTO_COMP:
553 return SADB_X_SATYPE_IPCOMP;
554 break;
555 default:
556 return 0;
557 }
558 /* NOTREACHED */
559}
560
561/* BTW, this scheme means that there is no way with PFKEY2 sockets to
562 * say specifically 'just raw sockets' as we encode them as 255.
563 */
564
565static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
566{
a02cec21 567 return proto == IPSEC_PROTO_ANY ? 0 : proto;
1da177e4
LT		 568}
569
570static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
571{
a02cec21 572 return proto ? proto : IPSEC_PROTO_ANY;
1da177e4
LT		 573}
574
9e8b4ed8
YH		 575static inline int pfkey_sockaddr_len(sa_family_t family)
576{
577 switch (family) {
578 case AF_INET:
579 return sizeof(struct sockaddr_in);
dfd56b8b 580#if IS_ENABLED(CONFIG_IPV6)
9e8b4ed8
YH		 581 case AF_INET6:
582 return sizeof(struct sockaddr_in6);
583#endif
584 }
585 return 0;
586}
587
5f95ac91
YH		 588static
589int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
1da177e4 590{
5f95ac91 591 switch (sa->sa_family) {
1da177e4 592 case AF_INET:
8ff24541 593 xaddr->a4 =
5f95ac91 594 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
1da177e4 595 return AF_INET;
dfd56b8b 596#if IS_ENABLED(CONFIG_IPV6)
1da177e4 597 case AF_INET6:
8ff24541 598 memcpy(xaddr->a6,
5f95ac91 599 &((struct sockaddr_in6 *)sa)->sin6_addr,
1da177e4
LT		 600 sizeof(struct in6_addr));
601 return AF_INET6;
602#endif
1da177e4 603 }
5f95ac91
YH		 604 return 0;
605}
606
607static
4c93fbb0 608int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
5f95ac91
YH		 609{
610 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
611 xaddr);
1da177e4
LT		 612}
613
4c93fbb0 614static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 615{
4c93fbb0
DM		 616 const struct sadb_sa *sa;
617 const struct sadb_address *addr;
1da177e4
LT		 618 uint16_t proto;
619 unsigned short family;
620 xfrm_address_t *xaddr;
621
ea110733 622 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 623 if (sa == NULL)
624 return NULL;
625
626 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
627 if (proto == 0)
628 return NULL;
629
630 /* sadb_address_len should be checked by caller */
ea110733 631 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
1da177e4
LT		 632 if (addr == NULL)
633 return NULL;
634
4c93fbb0 635 family = ((const struct sockaddr *)(addr + 1))->sa_family;
1da177e4
LT		 636 switch (family) {
637 case AF_INET:
4c93fbb0 638 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
1da177e4 639 break;
dfd56b8b 640#if IS_ENABLED(CONFIG_IPV6)
1da177e4 641 case AF_INET6:
4c93fbb0 642 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
1da177e4
LT		 643 break;
644#endif
645 default:
646 xaddr = NULL;
647 }
648
649 if (!xaddr)
650 return NULL;
651
bd55775c 652 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
1da177e4
LT		 653}
654
655#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
9e8b4ed8 656
1da177e4
LT		 657static int
658pfkey_sockaddr_size(sa_family_t family)
659{
9e8b4ed8 660 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
1da177e4
LT		 661}
662
55569ce2
KM		 663static inline int pfkey_mode_from_xfrm(int mode)
664{
665 switch(mode) {
666 case XFRM_MODE_TRANSPORT:
667 return IPSEC_MODE_TRANSPORT;
668 case XFRM_MODE_TUNNEL:
669 return IPSEC_MODE_TUNNEL;
670 case XFRM_MODE_BEET:
671 return IPSEC_MODE_BEET;
672 default:
673 return -1;
674 }
675}
676
677static inline int pfkey_mode_to_xfrm(int mode)
678{
679 switch(mode) {
680 case IPSEC_MODE_ANY: /*XXX*/
681 case IPSEC_MODE_TRANSPORT:
682 return XFRM_MODE_TRANSPORT;
683 case IPSEC_MODE_TUNNEL:
684 return XFRM_MODE_TUNNEL;
685 case IPSEC_MODE_BEET:
686 return XFRM_MODE_BEET;
687 default:
688 return -1;
689 }
690}
691
183cad12 692static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
4c93fbb0
DM		 693 struct sockaddr *sa,
694 unsigned short family)
e5b56652
YH		 695{
696 switch (family) {
697 case AF_INET:
698 {
699 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
700 sin->sin_family = AF_INET;
701 sin->sin_port = port;
702 sin->sin_addr.s_addr = xaddr->a4;
703 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
704 return 32;
705 }
dfd56b8b 706#if IS_ENABLED(CONFIG_IPV6)
e5b56652
YH		 707 case AF_INET6:
708 {
709 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
710 sin6->sin6_family = AF_INET6;
711 sin6->sin6_port = port;
712 sin6->sin6_flowinfo = 0;
4e3fd7a0 713 sin6->sin6_addr = *(struct in6_addr *)xaddr->a6;
e5b56652
YH		 714 sin6->sin6_scope_id = 0;
715 return 128;
716 }
717#endif
718 }
719 return 0;
720}
721
4c93fbb0 722static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
050f009e 723 int add_keys, int hsc)
1da177e4
LT		 724{
725 struct sk_buff *skb;
726 struct sadb_msg *hdr;
727 struct sadb_sa *sa;
728 struct sadb_lifetime *lifetime;
729 struct sadb_address *addr;
730 struct sadb_key *key;
731 struct sadb_x_sa2 *sa2;
df71837d
TJ		 732 struct sadb_x_sec_ctx *sec_ctx;
733 struct xfrm_sec_ctx *xfrm_ctx;
734 int ctx_size = 0;
1da177e4
LT		 735 int size;
736 int auth_key_size = 0;
737 int encrypt_key_size = 0;
738 int sockaddr_size;
739 struct xfrm_encap_tmpl *natt = NULL;
55569ce2 740 int mode;
1da177e4
LT		 741
742 /* address family check */
743 sockaddr_size = pfkey_sockaddr_size(x->props.family);
744 if (!sockaddr_size)
745 return ERR_PTR(-EINVAL);
746
747 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
748 key(AE), (identity(SD),) (sensitivity)> */
8ff24541 749 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
1da177e4
LT		 750 sizeof(struct sadb_lifetime) +
751 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
752 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
8ff24541 753 sizeof(struct sadb_address)*2 +
1da177e4
LT		 754 sockaddr_size*2 +
755 sizeof(struct sadb_x_sa2);
df71837d
TJ		 756
757 if ((xfrm_ctx = x->security)) {
758 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
759 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
760 }
761
1da177e4 762 /* identity & sensitivity */
70e94e66 763 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
1da177e4
LT		 764 size += sizeof(struct sadb_address) + sockaddr_size;
765
766 if (add_keys) {
767 if (x->aalg && x->aalg->alg_key_len) {
8ff24541
YH		 768 auth_key_size =
769 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
1da177e4
LT		 770 size += sizeof(struct sadb_key) + auth_key_size;
771 }
772 if (x->ealg && x->ealg->alg_key_len) {
8ff24541
YH		 773 encrypt_key_size =
774 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
1da177e4
LT		 775 size += sizeof(struct sadb_key) + encrypt_key_size;
776 }
777 }
778 if (x->encap)
779 natt = x->encap;
780
781 if (natt && natt->encap_type) {
782 size += sizeof(struct sadb_x_nat_t_type);
783 size += sizeof(struct sadb_x_nat_t_port);
784 size += sizeof(struct sadb_x_nat_t_port);
785 }
786
787 skb = alloc_skb(size + 16, GFP_ATOMIC);
788 if (skb == NULL)
789 return ERR_PTR(-ENOBUFS);
790
791 /* call should fill header later */
792 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
793 memset(hdr, 0, size); /* XXX do we need this ? */
794 hdr->sadb_msg_len = size / sizeof(uint64_t);
795
796 /* sa */
797 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
798 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
799 sa->sadb_sa_exttype = SADB_EXT_SA;
800 sa->sadb_sa_spi = x->id.spi;
801 sa->sadb_sa_replay = x->props.replay_window;
4f09f0bb
HX		 802 switch (x->km.state) {
803 case XFRM_STATE_VALID:
804 sa->sadb_sa_state = x->km.dying ?
805 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
806 break;
807 case XFRM_STATE_ACQ:
1da177e4 808 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
4f09f0bb
HX		 809 break;
810 default:
1da177e4 811 sa->sadb_sa_state = SADB_SASTATE_DEAD;
4f09f0bb
HX		 812 break;
813 }
1da177e4
LT		 814 sa->sadb_sa_auth = 0;
815 if (x->aalg) {
816 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
7e50f84c
JK		 817 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
818 a->desc.sadb_alg_id : 0;
1da177e4
LT		 819 }
820 sa->sadb_sa_encrypt = 0;
821 BUG_ON(x->ealg && x->calg);
822 if (x->ealg) {
823 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
7e50f84c
JK		 824 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
825 a->desc.sadb_alg_id : 0;
1da177e4
LT		 826 }
827 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
828 if (x->calg) {
829 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
7e50f84c
JK		 830 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
831 a->desc.sadb_alg_id : 0;
1da177e4
LT		 832 }
833
834 sa->sadb_sa_flags = 0;
835 if (x->props.flags & XFRM_STATE_NOECN)
836 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
837 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
838 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
dd87147e
HX		 839 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
840 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
1da177e4
LT		 841
842 /* hard time */
843 if (hsc & 2) {
8ff24541 844 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 845 sizeof(struct sadb_lifetime));
846 lifetime->sadb_lifetime_len =
847 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
848 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
849 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
850 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
851 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
852 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
853 }
854 /* soft time */
855 if (hsc & 1) {
8ff24541 856 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 857 sizeof(struct sadb_lifetime));
858 lifetime->sadb_lifetime_len =
859 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
860 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
861 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
862 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
863 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
864 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
865 }
866 /* current time */
867 lifetime = (struct sadb_lifetime *) skb_put(skb,
868 sizeof(struct sadb_lifetime));
869 lifetime->sadb_lifetime_len =
870 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
871 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
872 lifetime->sadb_lifetime_allocations = x->curlft.packets;
873 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
874 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
875 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
876 /* src address */
8ff24541 877 addr = (struct sadb_address*) skb_put(skb,
1da177e4 878 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 879 addr->sadb_address_len =
1da177e4
LT		 880 (sizeof(struct sadb_address)+sockaddr_size)/
881 sizeof(uint64_t);
882 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
8ff24541
YH		 883 /* "if the ports are non-zero, then the sadb_address_proto field,
884 normally zero, MUST be filled in with the transport
1da177e4 885 protocol's number." - RFC2367 */
8ff24541 886 addr->sadb_address_proto = 0;
1da177e4 887 addr->sadb_address_reserved = 0;
1da177e4 888
e5b56652
YH		 889 addr->sadb_address_prefixlen =
890 pfkey_sockaddr_fill(&x->props.saddr, 0,
891 (struct sockaddr *) (addr + 1),
892 x->props.family);
893 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 894 BUG();
895
896 /* dst address */
8ff24541 897 addr = (struct sadb_address*) skb_put(skb,
1da177e4 898 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 899 addr->sadb_address_len =
1da177e4
LT		 900 (sizeof(struct sadb_address)+sockaddr_size)/
901 sizeof(uint64_t);
902 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
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->id.daddr, 0,
908 (struct sockaddr *) (addr + 1),
909 x->props.family);
910 if (!addr->sadb_address_prefixlen)
911 BUG();
1da177e4 912
70e94e66
YH		 913 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
914 x->props.family)) {
e5b56652
YH		 915 addr = (struct sadb_address*) skb_put(skb,
916 sizeof(struct sadb_address)+sockaddr_size);
917 addr->sadb_address_len =
918 (sizeof(struct sadb_address)+sockaddr_size)/
919 sizeof(uint64_t);
920 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
921 addr->sadb_address_proto =
922 pfkey_proto_from_xfrm(x->sel.proto);
923 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
924 addr->sadb_address_reserved = 0;
1da177e4 925
e5b56652
YH		 926 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
927 (struct sockaddr *) (addr + 1),
928 x->props.family);
1da177e4 929 }
1da177e4
LT		 930
931 /* auth key */
932 if (add_keys && auth_key_size) {
8ff24541 933 key = (struct sadb_key *) skb_put(skb,
1da177e4
LT		 934 sizeof(struct sadb_key)+auth_key_size);
935 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
936 sizeof(uint64_t);
937 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
938 key->sadb_key_bits = x->aalg->alg_key_len;
939 key->sadb_key_reserved = 0;
940 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
941 }
942 /* encrypt key */
943 if (add_keys && encrypt_key_size) {
8ff24541 944 key = (struct sadb_key *) skb_put(skb,
1da177e4 945 sizeof(struct sadb_key)+encrypt_key_size);
8ff24541 946 key->sadb_key_len = (sizeof(struct sadb_key) +
1da177e4
LT		 947 encrypt_key_size) / sizeof(uint64_t);
948 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
949 key->sadb_key_bits = x->ealg->alg_key_len;
950 key->sadb_key_reserved = 0;
8ff24541 951 memcpy(key + 1, x->ealg->alg_key,
1da177e4
LT		 952 (x->ealg->alg_key_len+7)/8);
953 }
954
955 /* sa */
956 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
957 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
958 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
55569ce2
KM		 959 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
960 kfree_skb(skb);
961 return ERR_PTR(-EINVAL);
962 }
963 sa2->sadb_x_sa2_mode = mode;
1da177e4
LT		 964 sa2->sadb_x_sa2_reserved1 = 0;
965 sa2->sadb_x_sa2_reserved2 = 0;
966 sa2->sadb_x_sa2_sequence = 0;
967 sa2->sadb_x_sa2_reqid = x->props.reqid;
968
969 if (natt && natt->encap_type) {
970 struct sadb_x_nat_t_type *n_type;
971 struct sadb_x_nat_t_port *n_port;
972
973 /* type */
974 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
975 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
976 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
977 n_type->sadb_x_nat_t_type_type = natt->encap_type;
978 n_type->sadb_x_nat_t_type_reserved[0] = 0;
979 n_type->sadb_x_nat_t_type_reserved[1] = 0;
980 n_type->sadb_x_nat_t_type_reserved[2] = 0;
981
982 /* source port */
983 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
984 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
985 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
986 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
987 n_port->sadb_x_nat_t_port_reserved = 0;
988
989 /* dest port */
990 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
991 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
992 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
993 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
994 n_port->sadb_x_nat_t_port_reserved = 0;
995 }
996
df71837d
TJ		 997 /* security context */
998 if (xfrm_ctx) {
999 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
1000 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1001 sec_ctx->sadb_x_sec_len =
1002 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1003 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1004 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1005 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1006 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1007 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1008 xfrm_ctx->ctx_len);
1009 }
1010
1da177e4
LT		 1011 return skb;
1012}
1013
050f009e 1014
4c93fbb0 1015static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
050f009e
HX		 1016{
1017 struct sk_buff *skb;
1018
050f009e 1019 skb = __pfkey_xfrm_state2msg(x, 1, 3);
050f009e
HX		 1020
1021 return skb;
1022}
1023
4c93fbb0 1024static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
050f009e
HX		 1025 int hsc)
1026{
1027 return __pfkey_xfrm_state2msg(x, 0, hsc);
1028}
1029
07fb0f17 1030static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
4c93fbb0
DM		 1031 const struct sadb_msg *hdr,
1032 void * const *ext_hdrs)
1da177e4 1033{
8ff24541 1034 struct xfrm_state *x;
4c93fbb0
DM		 1035 const struct sadb_lifetime *lifetime;
1036 const struct sadb_sa *sa;
1037 const struct sadb_key *key;
1038 const struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 1039 uint16_t proto;
1040 int err;
8ff24541 1041
1da177e4 1042
ea110733 1043 sa = ext_hdrs[SADB_EXT_SA - 1];
1da177e4
LT		 1044 if (!sa ||
1045 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1046 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1047 return ERR_PTR(-EINVAL);
1048 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1049 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1050 return ERR_PTR(-EINVAL);
1051 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1052 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1053 return ERR_PTR(-EINVAL);
1054 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1055 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1056 return ERR_PTR(-EINVAL);
1057
1058 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1059 if (proto == 0)
1060 return ERR_PTR(-EINVAL);
1061
1062 /* default error is no buffer space */
1063 err = -ENOBUFS;
1064
1065 /* RFC2367:
1066
1067 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1068 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1069 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1070 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1071 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1072 not true.
1073
8ff24541 1074 However, KAME setkey always uses SADB_SASTATE_LARVAL.
1da177e4
LT		 1075 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1076 */
1077 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1078 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1079 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1080 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1081 return ERR_PTR(-EINVAL);
ea110733 1082 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1083 if (key != NULL &&
1084 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1085 ((key->sadb_key_bits+7) / 8 == 0 ||
1086 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1087 return ERR_PTR(-EINVAL);
1088 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1089 if (key != NULL &&
1090 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1091 ((key->sadb_key_bits+7) / 8 == 0 ||
1092 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1093 return ERR_PTR(-EINVAL);
1094
07fb0f17 1095 x = xfrm_state_alloc(net);
1da177e4
LT		 1096 if (x == NULL)
1097 return ERR_PTR(-ENOBUFS);
1098
1099 x->id.proto = proto;
1100 x->id.spi = sa->sadb_sa_spi;
33fce60d
FD		 1101 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1102 (sizeof(x->replay.bitmap) * 8));
1da177e4
LT		 1103 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1104 x->props.flags |= XFRM_STATE_NOECN;
1105 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1106 x->props.flags |= XFRM_STATE_DECAP_DSCP;
dd87147e
HX		 1107 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1108 x->props.flags |= XFRM_STATE_NOPMTUDISC;
1da177e4 1109
ea110733 1110 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
1da177e4
LT		 1111 if (lifetime != NULL) {
1112 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1113 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1114 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1115 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1116 }
ea110733 1117 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
1da177e4
LT		 1118 if (lifetime != NULL) {
1119 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1120 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1121 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1122 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1123 }
df71837d 1124
ea110733 1125 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d
TJ		 1126 if (sec_ctx != NULL) {
1127 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
1128
1129 if (!uctx)
1130 goto out;
1131
1132 err = security_xfrm_state_alloc(x, uctx);
1133 kfree(uctx);
1134
1135 if (err)
1136 goto out;
1137 }
1138
ea110733 1139 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
1da177e4
LT		 1140 if (sa->sadb_sa_auth) {
1141 int keysize = 0;
1142 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
7e50f84c 1143 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1144 err = -ENOSYS;
1145 goto out;
1146 }
1147 if (key)
1148 keysize = (key->sadb_key_bits + 7) / 8;
1149 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1150 if (!x->aalg)
1151 goto out;
1152 strcpy(x->aalg->alg_name, a->name);
1153 x->aalg->alg_key_len = 0;
1154 if (key) {
1155 x->aalg->alg_key_len = key->sadb_key_bits;
1156 memcpy(x->aalg->alg_key, key+1, keysize);
1157 }
c20a66f4 1158 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
1da177e4
LT		 1159 x->props.aalgo = sa->sadb_sa_auth;
1160 /* x->algo.flags = sa->sadb_sa_flags; */
1161 }
1162 if (sa->sadb_sa_encrypt) {
1163 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1164 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1165 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1166 err = -ENOSYS;
1167 goto out;
1168 }
1169 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1170 if (!x->calg)
1171 goto out;
1172 strcpy(x->calg->alg_name, a->name);
1173 x->props.calgo = sa->sadb_sa_encrypt;
1174 } else {
1175 int keysize = 0;
1176 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
7e50f84c 1177 if (!a || !a->pfkey_supported) {
1da177e4
LT		 1178 err = -ENOSYS;
1179 goto out;
1180 }
1181 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1182 if (key)
1183 keysize = (key->sadb_key_bits + 7) / 8;
1184 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1185 if (!x->ealg)
1186 goto out;
1187 strcpy(x->ealg->alg_name, a->name);
1188 x->ealg->alg_key_len = 0;
1189 if (key) {
1190 x->ealg->alg_key_len = key->sadb_key_bits;
1191 memcpy(x->ealg->alg_key, key+1, keysize);
1192 }
1193 x->props.ealgo = sa->sadb_sa_encrypt;
1194 }
1195 }
1196 /* x->algo.flags = sa->sadb_sa_flags; */
1197
8ff24541 1198 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1da177e4 1199 &x->props.saddr);
8ff24541 1200 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
1da177e4
LT		 1201 &x->id.daddr);
1202
1203 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
4c93fbb0 1204 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
55569ce2
KM		 1205 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1206 if (mode < 0) {
1207 err = -EINVAL;
1208 goto out;
1209 }
1210 x->props.mode = mode;
1da177e4
LT		 1211 x->props.reqid = sa2->sadb_x_sa2_reqid;
1212 }
1213
1214 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
4c93fbb0 1215 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
1da177e4
LT		 1216
1217 /* Nobody uses this, but we try. */
1218 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1219 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1220 }
1221
4da51056 1222 if (!x->sel.family)
4a4b6271
JL		 1223 x->sel.family = x->props.family;
1224
1da177e4 1225 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
4c93fbb0 1226 const struct sadb_x_nat_t_type* n_type;
1da177e4
LT		 1227 struct xfrm_encap_tmpl *natt;
1228
1229 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1230 if (!x->encap)
1231 goto out;
1232
1233 natt = x->encap;
1234 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1235 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1236
1237 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
4c93fbb0 1238 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1239 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1240 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1241 }
1242 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
4c93fbb0 1243 const struct sadb_x_nat_t_port *n_port =
1da177e4
LT		 1244 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1245 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1246 }
a8d694c6 1247 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
1da177e4
LT		 1248 }
1249
72cb6962
HX		 1250 err = xfrm_init_state(x);
1251 if (err)
1da177e4 1252 goto out;
72cb6962 1253
1da177e4 1254 x->km.seq = hdr->sadb_msg_seq;
1da177e4
LT		 1255 return x;
1256
1257out:
1258 x->km.state = XFRM_STATE_DEAD;
1259 xfrm_state_put(x);
1260 return ERR_PTR(err);
1261}
1262
4c93fbb0 1263static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1264{
1265 return -EOPNOTSUPP;
1266}
1267
4c93fbb0 1268static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1269{
07fb0f17 1270 struct net *net = sock_net(sk);
1da177e4
LT		 1271 struct sk_buff *resp_skb;
1272 struct sadb_x_sa2 *sa2;
1273 struct sadb_address *saddr, *daddr;
1274 struct sadb_msg *out_hdr;
658b219e 1275 struct sadb_spirange *range;
1da177e4 1276 struct xfrm_state *x = NULL;
55569ce2 1277 int mode;
658b219e
HX		 1278 int err;
1279 u32 min_spi, max_spi;
1da177e4
LT		 1280 u32 reqid;
1281 u8 proto;
1282 unsigned short family;
1283 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1284
1285 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1286 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1287 return -EINVAL;
1288
1289 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1290 if (proto == 0)
1291 return -EINVAL;
1292
1293 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
55569ce2
KM		 1294 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1295 if (mode < 0)
1296 return -EINVAL;
1da177e4
LT		 1297 reqid = sa2->sadb_x_sa2_reqid;
1298 } else {
1299 mode = 0;
1300 reqid = 0;
1301 }
1302
1303 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1304 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1305
1306 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1307 switch (family) {
1308 case AF_INET:
1309 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1310 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1311 break;
dfd56b8b 1312#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1313 case AF_INET6:
1314 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1315 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1316 break;
1317#endif
1318 }
1319
1320 if (hdr->sadb_msg_seq) {
bd55775c 1321 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
70e94e66 1322 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
1da177e4
LT		 1323 xfrm_state_put(x);
1324 x = NULL;
1325 }
1326 }
1327
1328 if (!x)
bd55775c 1329 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
1da177e4
LT		 1330
1331 if (x == NULL)
1332 return -ENOENT;
1333
658b219e
HX		 1334 min_spi = 0x100;
1335 max_spi = 0x0fffffff;
1da177e4 1336
658b219e
HX		 1337 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1338 if (range) {
1339 min_spi = range->sadb_spirange_min;
1340 max_spi = range->sadb_spirange_max;
1da177e4 1341 }
658b219e 1342
776e9dd9
FD		 1343 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1344 if (err) {
1345 xfrm_state_put(x);
1346 return err;
1347 }
1348
658b219e 1349 err = xfrm_alloc_spi(x, min_spi, max_spi);
050f009e 1350 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
1da177e4
LT		 1351
1352 if (IS_ERR(resp_skb)) {
1353 xfrm_state_put(x);
1354 return PTR_ERR(resp_skb);
1355 }
1356
1357 out_hdr = (struct sadb_msg *) resp_skb->data;
1358 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1359 out_hdr->sadb_msg_type = SADB_GETSPI;
1360 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1361 out_hdr->sadb_msg_errno = 0;
1362 out_hdr->sadb_msg_reserved = 0;
1363 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1364 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1365
1366 xfrm_state_put(x);
1367
07fb0f17 1368 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
1da177e4
LT		 1369
1370 return 0;
1371}
1372
4c93fbb0 1373static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1374{
07fb0f17 1375 struct net *net = sock_net(sk);
1da177e4
LT		 1376 struct xfrm_state *x;
1377
1378 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1379 return -EOPNOTSUPP;
1380
1381 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1382 return 0;
1383
bd55775c 1384 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
1da177e4
LT		 1385 if (x == NULL)
1386 return 0;
1387
1388 spin_lock_bh(&x->lock);
5b8ef341 1389 if (x->km.state == XFRM_STATE_ACQ)
1da177e4 1390 x->km.state = XFRM_STATE_ERROR;
5b8ef341 1391
1da177e4
LT		 1392 spin_unlock_bh(&x->lock);
1393 xfrm_state_put(x);
1394 return 0;
1395}
1396
26b15dad
JHS		 1397static inline int event2poltype(int event)
1398{
1399 switch (event) {
f60f6b8f 1400 case XFRM_MSG_DELPOLICY:
26b15dad 1401 return SADB_X_SPDDELETE;
f60f6b8f 1402 case XFRM_MSG_NEWPOLICY:
26b15dad 1403 return SADB_X_SPDADD;
f60f6b8f 1404 case XFRM_MSG_UPDPOLICY:
26b15dad 1405 return SADB_X_SPDUPDATE;
f60f6b8f 1406 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 1407 // return SADB_X_SPDEXPIRE;
1408 default:
207024b9 1409 pr_err("pfkey: Unknown policy event %d\n", event);
26b15dad
JHS		 1410 break;
1411 }
1412
1413 return 0;
1414}
1415
1416static inline int event2keytype(int event)
1417{
1418 switch (event) {
f60f6b8f 1419 case XFRM_MSG_DELSA:
26b15dad 1420 return SADB_DELETE;
f60f6b8f 1421 case XFRM_MSG_NEWSA:
26b15dad 1422 return SADB_ADD;
f60f6b8f 1423 case XFRM_MSG_UPDSA:
26b15dad 1424 return SADB_UPDATE;
f60f6b8f 1425 case XFRM_MSG_EXPIRE:
26b15dad
JHS		 1426 return SADB_EXPIRE;
1427 default:
207024b9 1428 pr_err("pfkey: Unknown SA event %d\n", event);
26b15dad
JHS		 1429 break;
1430 }
1431
1432 return 0;
1433}
1434
1435/* ADD/UPD/DEL */
214e005b 1436static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 1437{
1438 struct sk_buff *skb;
1439 struct sadb_msg *hdr;
26b15dad 1440
050f009e 1441 skb = pfkey_xfrm_state2msg(x);
26b15dad
JHS		 1442
1443 if (IS_ERR(skb))
1444 return PTR_ERR(skb);
1445
1446 hdr = (struct sadb_msg *) skb->data;
1447 hdr->sadb_msg_version = PF_KEY_V2;
1448 hdr->sadb_msg_type = event2keytype(c->event);
1449 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1450 hdr->sadb_msg_errno = 0;
1451 hdr->sadb_msg_reserved = 0;
1452 hdr->sadb_msg_seq = c->seq;
15e47304 1453 hdr->sadb_msg_pid = c->portid;
26b15dad 1454
07fb0f17 1455 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
26b15dad
JHS		 1456
1457 return 0;
1458}
1da177e4 1459
4c93fbb0 1460static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1461{
07fb0f17 1462 struct net *net = sock_net(sk);
1da177e4
LT		 1463 struct xfrm_state *x;
1464 int err;
26b15dad 1465 struct km_event c;
1da177e4 1466
07fb0f17 1467 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
1da177e4
LT		 1468 if (IS_ERR(x))
1469 return PTR_ERR(x);
1470
26b15dad 1471 xfrm_state_hold(x);
1da177e4
LT		 1472 if (hdr->sadb_msg_type == SADB_ADD)
1473 err = xfrm_state_add(x);
1474 else
1475 err = xfrm_state_update(x);
1476
ab5f5e8b 1477 xfrm_audit_state_add(x, err ? 0 : 1,
2532386f
EP		 1478 audit_get_loginuid(current),
1479 audit_get_sessionid(current), 0);
161a09e7 1480
1da177e4
LT		 1481 if (err < 0) {
1482 x->km.state = XFRM_STATE_DEAD;
21380b81 1483 __xfrm_state_put(x);
7d6dfe1f 1484 goto out;
1da177e4
LT		 1485 }
1486
26b15dad 1487 if (hdr->sadb_msg_type == SADB_ADD)
f60f6b8f 1488 c.event = XFRM_MSG_NEWSA;
26b15dad 1489 else
f60f6b8f 1490 c.event = XFRM_MSG_UPDSA;
26b15dad 1491 c.seq = hdr->sadb_msg_seq;
15e47304 1492 c.portid = hdr->sadb_msg_pid;
26b15dad 1493 km_state_notify(x, &c);
7d6dfe1f 1494out:
26b15dad 1495 xfrm_state_put(x);
26b15dad 1496 return err;
1da177e4
LT		 1497}
1498
4c93fbb0 1499static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1500{
07fb0f17 1501 struct net *net = sock_net(sk);
1da177e4 1502 struct xfrm_state *x;
26b15dad
JHS		 1503 struct km_event c;
1504 int err;
1da177e4
LT		 1505
1506 if (!ext_hdrs[SADB_EXT_SA-1] ||
1507 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1508 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1509 return -EINVAL;
1510
07fb0f17 1511 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1512 if (x == NULL)
1513 return -ESRCH;
1514
c8c05a8e
CZ		 1515 if ((err = security_xfrm_state_delete(x)))
1516 goto out;
1517
1da177e4 1518 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 1519 err = -EPERM;
1520 goto out;
1da177e4 1521 }
161a09e7 1522
26b15dad 1523 err = xfrm_state_delete(x);
161a09e7 1524
c8c05a8e
CZ		 1525 if (err < 0)
1526 goto out;
1da177e4 1527
26b15dad 1528 c.seq = hdr->sadb_msg_seq;
15e47304 1529 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1530 c.event = XFRM_MSG_DELSA;
26b15dad 1531 km_state_notify(x, &c);
c8c05a8e 1532out:
ab5f5e8b 1533 xfrm_audit_state_delete(x, err ? 0 : 1,
2532386f
EP		 1534 audit_get_loginuid(current),
1535 audit_get_sessionid(current), 0);
26b15dad 1536 xfrm_state_put(x);
1da177e4 1537
26b15dad 1538 return err;
1da177e4
LT		 1539}
1540
4c93fbb0 1541static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1542{
07fb0f17 1543 struct net *net = sock_net(sk);
1da177e4
LT		 1544 __u8 proto;
1545 struct sk_buff *out_skb;
1546 struct sadb_msg *out_hdr;
1547 struct xfrm_state *x;
1548
1549 if (!ext_hdrs[SADB_EXT_SA-1] ||
1550 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1551 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1552 return -EINVAL;
1553
07fb0f17 1554 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
1da177e4
LT		 1555 if (x == NULL)
1556 return -ESRCH;
1557
050f009e 1558 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1559 proto = x->id.proto;
1560 xfrm_state_put(x);
1561 if (IS_ERR(out_skb))
1562 return PTR_ERR(out_skb);
1563
1564 out_hdr = (struct sadb_msg *) out_skb->data;
1565 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
435000be 1566 out_hdr->sadb_msg_type = SADB_GET;
1da177e4
LT		 1567 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1568 out_hdr->sadb_msg_errno = 0;
1569 out_hdr->sadb_msg_reserved = 0;
1570 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1571 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
07fb0f17 1572 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1da177e4
LT		 1573
1574 return 0;
1575}
1576
4c93fbb0 1577static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
dd0fc66f 1578 gfp_t allocation)
1da177e4
LT		 1579{
1580 struct sk_buff *skb;
1581 struct sadb_msg *hdr;
1582 int len, auth_len, enc_len, i;
1583
7e50f84c 1584 auth_len = xfrm_count_pfkey_auth_supported();
1da177e4
LT		 1585 if (auth_len) {
1586 auth_len *= sizeof(struct sadb_alg);
1587 auth_len += sizeof(struct sadb_supported);
1588 }
8ff24541 1589
7e50f84c 1590 enc_len = xfrm_count_pfkey_enc_supported();
1da177e4
LT		 1591 if (enc_len) {
1592 enc_len *= sizeof(struct sadb_alg);
1593 enc_len += sizeof(struct sadb_supported);
1594 }
8ff24541 1595
1da177e4
LT		 1596 len = enc_len + auth_len + sizeof(struct sadb_msg);
1597
1598 skb = alloc_skb(len + 16, allocation);
1599 if (!skb)
1600 goto out_put_algs;
1601
1602 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1603 pfkey_hdr_dup(hdr, orig);
1604 hdr->sadb_msg_errno = 0;
1605 hdr->sadb_msg_len = len / sizeof(uint64_t);
1606
1607 if (auth_len) {
1608 struct sadb_supported *sp;
1609 struct sadb_alg *ap;
1610
1611 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1612 ap = (struct sadb_alg *) (sp + 1);
1613
1614 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1615 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1616
1617 for (i = 0; ; i++) {
1618 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1619 if (!aalg)
1620 break;
7e50f84c
JK		 1621 if (!aalg->pfkey_supported)
1622 continue;
1da177e4
LT		 1623 if (aalg->available)
1624 *ap++ = aalg->desc;
1625 }
1626 }
1627
1628 if (enc_len) {
1629 struct sadb_supported *sp;
1630 struct sadb_alg *ap;
1631
1632 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1633 ap = (struct sadb_alg *) (sp + 1);
1634
1635 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1636 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1637
1638 for (i = 0; ; i++) {
1639 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1640 if (!ealg)
1641 break;
7e50f84c
JK		 1642 if (!ealg->pfkey_supported)
1643 continue;
1da177e4
LT		 1644 if (ealg->available)
1645 *ap++ = ealg->desc;
1646 }
1647 }
1648
1649out_put_algs:
1650 return skb;
1651}
1652
4c93fbb0 1653static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1654{
1655 struct pfkey_sock *pfk = pfkey_sk(sk);
1656 struct sk_buff *supp_skb;
1657
1658 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1659 return -EINVAL;
1660
1661 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1662 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1663 return -EEXIST;
1664 pfk->registered |= (1<<hdr->sadb_msg_satype);
1665 }
1666
1667 xfrm_probe_algs();
8ff24541 1668
1da177e4
LT		 1669 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1670 if (!supp_skb) {
1671 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1672 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1673
1674 return -ENOBUFS;
1675 }
1676
07fb0f17 1677 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
1da177e4
LT		 1678
1679 return 0;
1680}
1681
4c93fbb0 1682static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
8be987d7
JHS		 1683{
1684 struct sk_buff *skb;
1685 struct sadb_msg *hdr;
1686
1687 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1688 if (!skb)
1689 return -ENOBUFS;
1690
1691 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1692 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1693 hdr->sadb_msg_errno = (uint8_t) 0;
1694 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1695
1696 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1697}
1698
214e005b 1699static int key_notify_sa_flush(const struct km_event *c)
26b15dad
JHS		 1700{
1701 struct sk_buff *skb;
1702 struct sadb_msg *hdr;
1703
1704 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1705 if (!skb)
1706 return -ENOBUFS;
1707 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
bf08867f 1708 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
151bb0ff 1709 hdr->sadb_msg_type = SADB_FLUSH;
26b15dad 1710 hdr->sadb_msg_seq = c->seq;
15e47304 1711 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 1712 hdr->sadb_msg_version = PF_KEY_V2;
1713 hdr->sadb_msg_errno = (uint8_t) 0;
1714 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 1715 hdr->sadb_msg_reserved = 0;
26b15dad 1716
07fb0f17 1717 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad
JHS		 1718
1719 return 0;
1720}
1721
4c93fbb0 1722static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 1723{
07fb0f17 1724 struct net *net = sock_net(sk);
95c96174 1725 unsigned int proto;
26b15dad 1726 struct km_event c;
161a09e7 1727 struct xfrm_audit audit_info;
8be987d7 1728 int err, err2;
1da177e4
LT		 1729
1730 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1731 if (proto == 0)
1732 return -EINVAL;
1733
0c11b942 1734 audit_info.loginuid = audit_get_loginuid(current);
2532386f 1735 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 1736 audit_info.secid = 0;
07fb0f17 1737 err = xfrm_state_flush(net, proto, &audit_info);
8be987d7 1738 err2 = unicast_flush_resp(sk, hdr);
9e64cc95
JHS		 1739 if (err || err2) {
1740 if (err == -ESRCH) /* empty table - go quietly */
1741 err = 0;
8be987d7 1742 return err ? err : err2;
9e64cc95 1743 }
8be987d7 1744
bf08867f 1745 c.data.proto = proto;
26b15dad 1746 c.seq = hdr->sadb_msg_seq;
15e47304 1747 c.portid = hdr->sadb_msg_pid;
f60f6b8f 1748 c.event = XFRM_MSG_FLUSHSA;
07fb0f17 1749 c.net = net;
26b15dad 1750 km_state_notify(NULL, &c);
1da177e4
LT		 1751
1752 return 0;
1753}
1754
1da177e4
LT		 1755static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1756{
83321d6b 1757 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 1758 struct sk_buff *out_skb;
1759 struct sadb_msg *out_hdr;
1760
83321d6b
TT		 1761 if (!pfkey_can_dump(&pfk->sk))
1762 return -ENOBUFS;
1763
050f009e 1764 out_skb = pfkey_xfrm_state2msg(x);
1da177e4
LT		 1765 if (IS_ERR(out_skb))
1766 return PTR_ERR(out_skb);
1767
1768 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 1769 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 1770 out_hdr->sadb_msg_type = SADB_DUMP;
1771 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1772 out_hdr->sadb_msg_errno = 0;
1773 out_hdr->sadb_msg_reserved = 0;
12a169e7 1774 out_hdr->sadb_msg_seq = count + 1;
15e47304 1775 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 1776
1777 if (pfk->dump.skb)
1778 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 1779 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 1780 pfk->dump.skb = out_skb;
1781
1da177e4
LT		 1782 return 0;
1783}
1784
83321d6b
TT		 1785static int pfkey_dump_sa(struct pfkey_sock *pfk)
1786{
07fb0f17
AD		 1787 struct net *net = sock_net(&pfk->sk);
1788 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
83321d6b
TT		 1789}
1790
1791static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1792{
283bc9f3
FD		 1793 struct net *net = sock_net(&pfk->sk);
1794
1795 xfrm_state_walk_done(&pfk->dump.u.state, net);
83321d6b
TT		 1796}
1797
4c93fbb0 1798static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1799{
1800 u8 proto;
d3623099 1801 struct xfrm_filter *filter = NULL;
83321d6b
TT		 1802 struct pfkey_sock *pfk = pfkey_sk(sk);
1803
1804 if (pfk->dump.dump != NULL)
1805 return -EBUSY;
1da177e4
LT		 1806
1807 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1808 if (proto == 0)
1809 return -EINVAL;
1810
d3623099
ND		 1811 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1812 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1813
1814 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1815 if (filter == NULL)
1816 return -ENOMEM;
1817
1818 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1819 sizeof(xfrm_address_t));
1820 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1821 sizeof(xfrm_address_t));
1822 filter->family = xfilter->sadb_x_filter_family;
1823 filter->splen = xfilter->sadb_x_filter_splen;
1824 filter->dplen = xfilter->sadb_x_filter_dplen;
1825 }
1826
83321d6b 1827 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 1828 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 1829 pfk->dump.dump = pfkey_dump_sa;
1830 pfk->dump.done = pfkey_dump_sa_done;
d3623099 1831 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
4c563f76 1832
83321d6b 1833 return pfkey_do_dump(pfk);
1da177e4
LT		 1834}
1835
4c93fbb0 1836static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4
LT		 1837{
1838 struct pfkey_sock *pfk = pfkey_sk(sk);
1839 int satype = hdr->sadb_msg_satype;
4c93fbb0 1840 bool reset_errno = false;
1da177e4
LT		 1841
1842 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
4c93fbb0 1843 reset_errno = true;
1da177e4
LT		 1844 if (satype != 0 && satype != 1)
1845 return -EINVAL;
1846 pfk->promisc = satype;
1847 }
4c93fbb0
DM		 1848 if (reset_errno && skb_cloned(skb))
1849 skb = skb_copy(skb, GFP_KERNEL);
1850 else
1851 skb = skb_clone(skb, GFP_KERNEL);
1852
1853 if (reset_errno && skb) {
1854 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1855 new_hdr->sadb_msg_errno = 0;
1856 }
1857
1858 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
1da177e4
LT		 1859 return 0;
1860}
1861
1862static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1863{
1864 int i;
1865 u32 reqid = *(u32*)ptr;
1866
1867 for (i=0; i<xp->xfrm_nr; i++) {
1868 if (xp->xfrm_vec[i].reqid == reqid)
1869 return -EEXIST;
1870 }
1871 return 0;
1872}
1873
07fb0f17 1874static u32 gen_reqid(struct net *net)
1da177e4 1875{
4c563f76 1876 struct xfrm_policy_walk walk;
1da177e4 1877 u32 start;
4c563f76 1878 int rc;
1da177e4
LT		 1879 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1880
1881 start = reqid;
1882 do {
1883 ++reqid;
1884 if (reqid == 0)
1885 reqid = IPSEC_MANUAL_REQID_MAX+1;
4c563f76 1886 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
07fb0f17 1887 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
283bc9f3 1888 xfrm_policy_walk_done(&walk, net);
4c563f76 1889 if (rc != -EEXIST)
1da177e4
LT		 1890 return reqid;
1891 } while (reqid != start);
1892 return 0;
1893}
1894
1895static int
1896parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1897{
07fb0f17 1898 struct net *net = xp_net(xp);
1da177e4 1899 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
55569ce2 1900 int mode;
1da177e4
LT		 1901
1902 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1903 return -ELOOP;
1904
1905 if (rq->sadb_x_ipsecrequest_mode == 0)
1906 return -EINVAL;
1907
1908 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
55569ce2
KM		 1909 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1910 return -EINVAL;
1911 t->mode = mode;
1da177e4
LT		 1912 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1913 t->optional = 1;
1914 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1915 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1916 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1917 t->reqid = 0;
07fb0f17 1918 if (!t->reqid && !(t->reqid = gen_reqid(net)))
1da177e4
LT		 1919 return -ENOBUFS;
1920 }
1921
1922 /* addresses present only in tunnel mode */
7e49e6de 1923 if (t->mode == XFRM_MODE_TUNNEL) {
5f95ac91
YH		 1924 u8 *sa = (u8 *) (rq + 1);
1925 int family, socklen;
1926
1927 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1928 &t->saddr);
1929 if (!family)
1da177e4 1930 return -EINVAL;
5f95ac91
YH		 1931
1932 socklen = pfkey_sockaddr_len(family);
1933 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1934 &t->id.daddr) != family)
1935 return -EINVAL;
1936 t->encap_family = family;
2718aa7c
MK		 1937 } else
1938 t->encap_family = xp->family;
1939
1da177e4 1940 /* No way to set this via kame pfkey */
c5d18e98 1941 t->allalgs = 1;
1da177e4
LT		 1942 xp->xfrm_nr++;
1943 return 0;
1944}
1945
1946static int
1947parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1948{
1949 int err;
1950 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1951 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1952
f674e72f
DC		 1953 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1954 return -EINVAL;
1955
1da177e4
LT		 1956 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1957 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1958 return err;
1959 len -= rq->sadb_x_ipsecrequest_len;
1960 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1961 }
1962 return 0;
1963}
1964
4c93fbb0 1965static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
df71837d
TJ		 1966{
1967 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1968
1969 if (xfrm_ctx) {
1970 int len = sizeof(struct sadb_x_sec_ctx);
1971 len += xfrm_ctx->ctx_len;
1972 return PFKEY_ALIGN8(len);
1973 }
1974 return 0;
1975}
1976
4c93fbb0 1977static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
1da177e4 1978{
4c93fbb0 1979 const struct xfrm_tmpl *t;
1da177e4 1980 int sockaddr_size = pfkey_sockaddr_size(xp->family);
2718aa7c
MK		 1981 int socklen = 0;
1982 int i;
1983
1984 for (i=0; i<xp->xfrm_nr; i++) {
1985 t = xp->xfrm_vec + i;
9e8b4ed8 1986 socklen += pfkey_sockaddr_len(t->encap_family);
2718aa7c 1987 }
1da177e4
LT		 1988
1989 return sizeof(struct sadb_msg) +
1990 (sizeof(struct sadb_lifetime) * 3) +
8ff24541 1991 (sizeof(struct sadb_address) * 2) +
1da177e4
LT		 1992 (sockaddr_size * 2) +
1993 sizeof(struct sadb_x_policy) +
2718aa7c
MK		 1994 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1995 (socklen * 2) +
df71837d 1996 pfkey_xfrm_policy2sec_ctx_size(xp);
1da177e4
LT		 1997}
1998
4c93fbb0 1999static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
1da177e4
LT		 2000{
2001 struct sk_buff *skb;
2002 int size;
2003
2004 size = pfkey_xfrm_policy2msg_size(xp);
2005
2006 skb = alloc_skb(size + 16, GFP_ATOMIC);
2007 if (skb == NULL)
2008 return ERR_PTR(-ENOBUFS);
2009
2010 return skb;
2011}
2012
4c93fbb0 2013static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
1da177e4
LT		 2014{
2015 struct sadb_msg *hdr;
2016 struct sadb_address *addr;
2017 struct sadb_lifetime *lifetime;
2018 struct sadb_x_policy *pol;
df71837d
TJ		 2019 struct sadb_x_sec_ctx *sec_ctx;
2020 struct xfrm_sec_ctx *xfrm_ctx;
1da177e4
LT		 2021 int i;
2022 int size;
2023 int sockaddr_size = pfkey_sockaddr_size(xp->family);
9e8b4ed8 2024 int socklen = pfkey_sockaddr_len(xp->family);
1da177e4
LT		 2025
2026 size = pfkey_xfrm_policy2msg_size(xp);
2027
2028 /* call should fill header later */
2029 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2030 memset(hdr, 0, size); /* XXX do we need this ? */
2031
2032 /* src address */
8ff24541 2033 addr = (struct sadb_address*) skb_put(skb,
1da177e4 2034 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 2035 addr->sadb_address_len =
1da177e4
LT		 2036 (sizeof(struct sadb_address)+sockaddr_size)/
2037 sizeof(uint64_t);
2038 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2039 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2040 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2041 addr->sadb_address_reserved = 0;
e5b56652
YH		 2042 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2043 xp->selector.sport,
2044 (struct sockaddr *) (addr + 1),
2045 xp->family))
1da177e4
LT		 2046 BUG();
2047
2048 /* dst address */
8ff24541 2049 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 2050 sizeof(struct sadb_address)+sockaddr_size);
2051 addr->sadb_address_len =
2052 (sizeof(struct sadb_address)+sockaddr_size)/
2053 sizeof(uint64_t);
2054 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2055 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
8ff24541 2056 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
1da177e4 2057 addr->sadb_address_reserved = 0;
e5b56652
YH		 2058
2059 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2060 (struct sockaddr *) (addr + 1),
2061 xp->family);
1da177e4
LT		 2062
2063 /* hard time */
8ff24541 2064 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2065 sizeof(struct sadb_lifetime));
2066 lifetime->sadb_lifetime_len =
2067 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2068 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2069 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2070 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2071 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2072 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2073 /* soft time */
8ff24541 2074 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2075 sizeof(struct sadb_lifetime));
2076 lifetime->sadb_lifetime_len =
2077 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2078 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2079 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2080 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2081 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2082 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2083 /* current time */
8ff24541 2084 lifetime = (struct sadb_lifetime *) skb_put(skb,
1da177e4
LT		 2085 sizeof(struct sadb_lifetime));
2086 lifetime->sadb_lifetime_len =
2087 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2088 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2089 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2090 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2091 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2092 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2093
2094 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2095 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2096 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2097 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2098 if (xp->action == XFRM_POLICY_ALLOW) {
2099 if (xp->xfrm_nr)
2100 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2101 else
2102 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2103 }
2104 pol->sadb_x_policy_dir = dir+1;
ff862a46 2105 pol->sadb_x_policy_reserved = 0;
1da177e4
LT		 2106 pol->sadb_x_policy_id = xp->index;
2107 pol->sadb_x_policy_priority = xp->priority;
2108
2109 for (i=0; i<xp->xfrm_nr; i++) {
4c93fbb0 2110 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
1da177e4 2111 struct sadb_x_ipsecrequest *rq;
1da177e4 2112 int req_size;
55569ce2 2113 int mode;
1da177e4
LT		 2114
2115 req_size = sizeof(struct sadb_x_ipsecrequest);
e5b56652
YH		 2116 if (t->mode == XFRM_MODE_TUNNEL) {
2117 socklen = pfkey_sockaddr_len(t->encap_family);
2118 req_size += socklen * 2;
2119 } else {
1da177e4 2120 size -= 2*socklen;
e5b56652 2121 }
1da177e4
LT		 2122 rq = (void*)skb_put(skb, req_size);
2123 pol->sadb_x_policy_len += req_size/8;
2124 memset(rq, 0, sizeof(*rq));
2125 rq->sadb_x_ipsecrequest_len = req_size;
2126 rq->sadb_x_ipsecrequest_proto = t->id.proto;
55569ce2
KM		 2127 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2128 return -EINVAL;
fefaa75e 2129 rq->sadb_x_ipsecrequest_mode = mode;
1da177e4
LT		 2130 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2131 if (t->reqid)
2132 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2133 if (t->optional)
2134 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2135 rq->sadb_x_ipsecrequest_reqid = t->reqid;
e5b56652 2136
7e49e6de 2137 if (t->mode == XFRM_MODE_TUNNEL) {
e5b56652
YH		 2138 u8 *sa = (void *)(rq + 1);
2139 pfkey_sockaddr_fill(&t->saddr, 0,
2140 (struct sockaddr *)sa,
2141 t->encap_family);
2142 pfkey_sockaddr_fill(&t->id.daddr, 0,
2143 (struct sockaddr *) (sa + socklen),
2144 t->encap_family);
1da177e4
LT		 2145 }
2146 }
df71837d
TJ		 2147
2148 /* security context */
2149 if ((xfrm_ctx = xp->security)) {
2150 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2151
2152 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2153 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2154 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2155 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2156 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2157 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2158 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2159 xfrm_ctx->ctx_len);
2160 }
2161
1da177e4
LT		 2162 hdr->sadb_msg_len = size / sizeof(uint64_t);
2163 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
55569ce2
KM		 2164
2165 return 0;
1da177e4
LT		 2166}
2167
214e005b 2168static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2169{
2170 struct sk_buff *out_skb;
2171 struct sadb_msg *out_hdr;
2172 int err;
2173
2174 out_skb = pfkey_xfrm_policy2msg_prep(xp);
9a127aad
DC		 2175 if (IS_ERR(out_skb))
2176 return PTR_ERR(out_skb);
2177
55569ce2
KM		 2178 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2179 if (err < 0)
2180 return err;
26b15dad
JHS		 2181
2182 out_hdr = (struct sadb_msg *) out_skb->data;
2183 out_hdr->sadb_msg_version = PF_KEY_V2;
2184
f60f6b8f 2185 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
26b15dad
JHS		 2186 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2187 else
2188 out_hdr->sadb_msg_type = event2poltype(c->event);
2189 out_hdr->sadb_msg_errno = 0;
2190 out_hdr->sadb_msg_seq = c->seq;
15e47304 2191 out_hdr->sadb_msg_pid = c->portid;
07fb0f17 2192 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
26b15dad
JHS		 2193 return 0;
2194
2195}
2196
4c93fbb0 2197static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2198{
07fb0f17 2199 struct net *net = sock_net(sk);
df71837d 2200 int err = 0;
1da177e4
LT		 2201 struct sadb_lifetime *lifetime;
2202 struct sadb_address *sa;
2203 struct sadb_x_policy *pol;
2204 struct xfrm_policy *xp;
26b15dad 2205 struct km_event c;
df71837d 2206 struct sadb_x_sec_ctx *sec_ctx;
1da177e4
LT		 2207
2208 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2209 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2210 !ext_hdrs[SADB_X_EXT_POLICY-1])
2211 return -EINVAL;
2212
2213 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2214 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2215 return -EINVAL;
2216 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2217 return -EINVAL;
2218
07fb0f17 2219 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2220 if (xp == NULL)
2221 return -ENOBUFS;
2222
2223 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2224 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2225 xp->priority = pol->sadb_x_policy_priority;
2226
d0d79c3f 2227 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4 2228 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
1da177e4
LT		 2229 xp->selector.family = xp->family;
2230 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2231 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2232 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2233 if (xp->selector.sport)
8f83f23e 2234 xp->selector.sport_mask = htons(0xffff);
1da177e4 2235
d0d79c3f 2236 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2237 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2238 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2239
2240 /* Amusing, we set this twice. KAME apps appear to set same value
2241 * in both addresses.
2242 */
2243 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2244
2245 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2246 if (xp->selector.dport)
8f83f23e 2247 xp->selector.dport_mask = htons(0xffff);
1da177e4 2248
ea110733 2249 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d
TJ		 2250 if (sec_ctx != NULL) {
2251 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2252
2253 if (!uctx) {
2254 err = -ENOBUFS;
2255 goto out;
2256 }
2257
03e1ad7b 2258 err = security_xfrm_policy_alloc(&xp->security, uctx);
df71837d
TJ		 2259 kfree(uctx);
2260
2261 if (err)
2262 goto out;
2263 }
2264
1da177e4
LT		 2265 xp->lft.soft_byte_limit = XFRM_INF;
2266 xp->lft.hard_byte_limit = XFRM_INF;
2267 xp->lft.soft_packet_limit = XFRM_INF;
2268 xp->lft.hard_packet_limit = XFRM_INF;
2269 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2270 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2271 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2272 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2273 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2274 }
2275 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2276 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2277 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2278 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2279 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2280 }
2281 xp->xfrm_nr = 0;
2282 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2283 (err = parse_ipsecrequests(xp, pol)) < 0)
2284 goto out;
2285
1da177e4
LT		 2286 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2287 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
df71837d 2288
ab5f5e8b 2289 xfrm_audit_policy_add(xp, err ? 0 : 1,
2532386f
EP		 2290 audit_get_loginuid(current),
2291 audit_get_sessionid(current), 0);
161a09e7 2292
df71837d
TJ		 2293 if (err)
2294 goto out;
1da177e4 2295
26b15dad 2296 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
f60f6b8f 2297 c.event = XFRM_MSG_UPDPOLICY;
8ff24541 2298 else
f60f6b8f 2299 c.event = XFRM_MSG_NEWPOLICY;
1da177e4 2300
26b15dad 2301 c.seq = hdr->sadb_msg_seq;
15e47304 2302 c.portid = hdr->sadb_msg_pid;
1da177e4 2303
26b15dad
JHS		 2304 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2305 xfrm_pol_put(xp);
1da177e4
LT		 2306 return 0;
2307
2308out:
12a169e7 2309 xp->walk.dead = 1;
64c31b3f 2310 xfrm_policy_destroy(xp);
1da177e4
LT		 2311 return err;
2312}
2313
4c93fbb0 2314static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2315{
07fb0f17 2316 struct net *net = sock_net(sk);
1da177e4
LT		 2317 int err;
2318 struct sadb_address *sa;
2319 struct sadb_x_policy *pol;
03e1ad7b 2320 struct xfrm_policy *xp;
1da177e4 2321 struct xfrm_selector sel;
26b15dad 2322 struct km_event c;
df71837d 2323 struct sadb_x_sec_ctx *sec_ctx;
2db3e47e 2324 struct xfrm_sec_ctx *pol_ctx = NULL;
1da177e4
LT		 2325
2326 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2327 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2328 !ext_hdrs[SADB_X_EXT_POLICY-1])
2329 return -EINVAL;
2330
2331 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2332 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2333 return -EINVAL;
2334
2335 memset(&sel, 0, sizeof(sel));
2336
d0d79c3f 2337 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1da177e4
LT		 2338 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2339 sel.prefixlen_s = sa->sadb_address_prefixlen;
2340 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2341 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2342 if (sel.sport)
8f83f23e 2343 sel.sport_mask = htons(0xffff);
1da177e4 2344
d0d79c3f 2345 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1da177e4
LT		 2346 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2347 sel.prefixlen_d = sa->sadb_address_prefixlen;
2348 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2349 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2350 if (sel.dport)
8f83f23e 2351 sel.dport_mask = htons(0xffff);
1da177e4 2352
ea110733 2353 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
df71837d
TJ		 2354 if (sec_ctx != NULL) {
2355 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
2356
2357 if (!uctx)
2358 return -ENOMEM;
2359
03e1ad7b 2360 err = security_xfrm_policy_alloc(&pol_ctx, uctx);
df71837d 2361 kfree(uctx);
df71837d
TJ		 2362 if (err)
2363 return err;
2db3e47e 2364 }
161a09e7 2365
8ca2e93b 2366 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
03e1ad7b
PM		 2367 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2368 1, &err);
2369 security_xfrm_policy_free(pol_ctx);
1da177e4
LT		 2370 if (xp == NULL)
2371 return -ENOENT;
2372
ab5f5e8b 2373 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2374 audit_get_loginuid(current),
2375 audit_get_sessionid(current), 0);
13fcfbb0
DM		 2376
2377 if (err)
c8c05a8e 2378 goto out;
13fcfbb0 2379
26b15dad 2380 c.seq = hdr->sadb_msg_seq;
15e47304 2381 c.portid = hdr->sadb_msg_pid;
1839faab 2382 c.data.byid = 0;
f60f6b8f 2383 c.event = XFRM_MSG_DELPOLICY;
26b15dad
JHS		 2384 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2385
c8c05a8e 2386out:
26b15dad 2387 xfrm_pol_put(xp);
e4c17216
PM		 2388 if (err == 0)
2389 xfrm_garbage_collect(net);
26b15dad
JHS		 2390 return err;
2391}
2392
4c93fbb0 2393static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
26b15dad
JHS		 2394{
2395 int err;
2396 struct sk_buff *out_skb;
2397 struct sadb_msg *out_hdr;
2398 err = 0;
2399
1da177e4
LT		 2400 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2401 if (IS_ERR(out_skb)) {
2402 err = PTR_ERR(out_skb);
2403 goto out;
2404 }
55569ce2
KM		 2405 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2406 if (err < 0)
2407 goto out;
1da177e4
LT		 2408
2409 out_hdr = (struct sadb_msg *) out_skb->data;
2410 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
26b15dad 2411 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
1da177e4
LT		 2412 out_hdr->sadb_msg_satype = 0;
2413 out_hdr->sadb_msg_errno = 0;
2414 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2415 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
07fb0f17 2416 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
1da177e4
LT		 2417 err = 0;
2418
2419out:
1da177e4
LT		 2420 return err;
2421}
2422
08de61be
SS		 2423#ifdef CONFIG_NET_KEY_MIGRATE
2424static int pfkey_sockaddr_pair_size(sa_family_t family)
2425{
9e8b4ed8 2426 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
08de61be
SS		 2427}
2428
13c1d189 2429static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
08de61be
SS		 2430 xfrm_address_t *saddr, xfrm_address_t *daddr,
2431 u16 *family)
2432{
5f95ac91
YH		 2433 int af, socklen;
2434
13c1d189 2435 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
08de61be
SS		 2436 return -EINVAL;
2437
13c1d189 2438 af = pfkey_sockaddr_extract(sa, saddr);
5f95ac91
YH		 2439 if (!af)
2440 return -EINVAL;
2441
2442 socklen = pfkey_sockaddr_len(af);
13c1d189 2443 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
5f95ac91 2444 daddr) != af)
08de61be 2445 return -EINVAL;
08de61be 2446
5f95ac91 2447 *family = af;
08de61be
SS		 2448 return 0;
2449}
2450
2451static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2452 struct xfrm_migrate *m)
2453{
2454 int err;
2455 struct sadb_x_ipsecrequest *rq2;
55569ce2 2456 int mode;
08de61be
SS		 2457
2458 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2459 len < rq1->sadb_x_ipsecrequest_len)
2460 return -EINVAL;
2461
2462 /* old endoints */
13c1d189
AE		 2463 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2464 rq1->sadb_x_ipsecrequest_len,
2465 &m->old_saddr, &m->old_daddr,
08de61be
SS		 2466 &m->old_family);
2467 if (err)
2468 return err;
2469
2470 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2471 len -= rq1->sadb_x_ipsecrequest_len;
2472
2473 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2474 len < rq2->sadb_x_ipsecrequest_len)
2475 return -EINVAL;
2476
2477 /* new endpoints */
13c1d189
AE		 2478 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2479 rq2->sadb_x_ipsecrequest_len,
2480 &m->new_saddr, &m->new_daddr,
08de61be
SS		 2481 &m->new_family);
2482 if (err)
2483 return err;
2484
2485 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2486 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2487 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2488 return -EINVAL;
2489
2490 m->proto = rq1->sadb_x_ipsecrequest_proto;
55569ce2
KM		 2491 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2492 return -EINVAL;
2493 m->mode = mode;
08de61be
SS		 2494 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2495
2496 return ((int)(rq1->sadb_x_ipsecrequest_len +
2497 rq2->sadb_x_ipsecrequest_len));
2498}
2499
2500static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2501 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2502{
2503 int i, len, ret, err = -EINVAL;
2504 u8 dir;
2505 struct sadb_address *sa;
13c1d189 2506 struct sadb_x_kmaddress *kma;
08de61be
SS		 2507 struct sadb_x_policy *pol;
2508 struct sadb_x_ipsecrequest *rq;
2509 struct xfrm_selector sel;
2510 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2511 struct xfrm_kmaddress k;
8d549c4f 2512 struct net *net = sock_net(sk);
08de61be
SS		 2513
2514 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
13c1d189 2515 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
08de61be
SS		 2516 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2517 err = -EINVAL;
2518 goto out;
2519 }
2520
13c1d189 2521 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
08de61be 2522 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
08de61be
SS		 2523
2524 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2525 err = -EINVAL;
2526 goto out;
2527 }
2528
13c1d189
AE		 2529 if (kma) {
2530 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2531 k.reserved = kma->sadb_x_kmaddress_reserved;
2532 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2533 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2534 &k.local, &k.remote, &k.family);
2535 if (ret < 0) {
2536 err = ret;
2537 goto out;
2538 }
2539 }
2540
08de61be
SS		 2541 dir = pol->sadb_x_policy_dir - 1;
2542 memset(&sel, 0, sizeof(sel));
2543
2544 /* set source address info of selector */
2545 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2546 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2547 sel.prefixlen_s = sa->sadb_address_prefixlen;
2548 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2549 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2550 if (sel.sport)
582ee43d 2551 sel.sport_mask = htons(0xffff);
08de61be
SS		 2552
2553 /* set destination address info of selector */
2554 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
2555 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2556 sel.prefixlen_d = sa->sadb_address_prefixlen;
2557 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2558 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2559 if (sel.dport)
582ee43d 2560 sel.dport_mask = htons(0xffff);
08de61be
SS		 2561
2562 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2563
2564 /* extract ipsecrequests */
2565 i = 0;
2566 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2567
2568 while (len > 0 && i < XFRM_MAX_DEPTH) {
2569 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2570 if (ret < 0) {
2571 err = ret;
2572 goto out;
2573 } else {
2574 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2575 len -= ret;
2576 i++;
2577 }
2578 }
2579
2580 if (!i || len > 0) {
2581 err = -EINVAL;
2582 goto out;
2583 }
2584
13c1d189 2585 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
8d549c4f 2586 kma ? &k : NULL, net);
08de61be
SS		 2587
2588 out:
2589 return err;
2590}
2591#else
2592static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
7f6daa63 2593 const struct sadb_msg *hdr, void * const *ext_hdrs)
08de61be
SS		 2594{
2595 return -ENOPROTOOPT;
2596}
2597#endif
2598
2599
4c93fbb0 2600static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2601{
07fb0f17 2602 struct net *net = sock_net(sk);
77d8d7a6 2603 unsigned int dir;
215a2dd3 2604 int err = 0, delete;
1da177e4
LT		 2605 struct sadb_x_policy *pol;
2606 struct xfrm_policy *xp;
26b15dad 2607 struct km_event c;
1da177e4
LT		 2608
2609 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2610 return -EINVAL;
2611
77d8d7a6
HX		 2612 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2613 if (dir >= XFRM_POLICY_MAX)
2614 return -EINVAL;
2615
215a2dd3 2616 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
8ca2e93b 2617 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
bd55775c 2618 dir, pol->sadb_x_policy_id, delete, &err);
1da177e4
LT		 2619 if (xp == NULL)
2620 return -ENOENT;
2621
215a2dd3 2622 if (delete) {
ab5f5e8b 2623 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2532386f
EP		 2624 audit_get_loginuid(current),
2625 audit_get_sessionid(current), 0);
1da177e4 2626
215a2dd3
EP		 2627 if (err)
2628 goto out;
2629 c.seq = hdr->sadb_msg_seq;
15e47304 2630 c.portid = hdr->sadb_msg_pid;
bf08867f 2631 c.data.byid = 1;
f60f6b8f 2632 c.event = XFRM_MSG_DELPOLICY;
77d8d7a6 2633 km_policy_notify(xp, dir, &c);
26b15dad 2634 } else {
77d8d7a6 2635 err = key_pol_get_resp(sk, xp, hdr, dir);
1da177e4 2636 }
1da177e4 2637
215a2dd3 2638out:
1da177e4 2639 xfrm_pol_put(xp);
e4c17216
PM		 2640 if (delete && err == 0)
2641 xfrm_garbage_collect(net);
1da177e4
LT		 2642 return err;
2643}
2644
2645static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2646{
83321d6b 2647 struct pfkey_sock *pfk = ptr;
1da177e4
LT		 2648 struct sk_buff *out_skb;
2649 struct sadb_msg *out_hdr;
55569ce2 2650 int err;
1da177e4 2651
83321d6b
TT		 2652 if (!pfkey_can_dump(&pfk->sk))
2653 return -ENOBUFS;
2654
1da177e4
LT		 2655 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2656 if (IS_ERR(out_skb))
2657 return PTR_ERR(out_skb);
2658
55569ce2
KM		 2659 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2660 if (err < 0)
2661 return err;
1da177e4
LT		 2662
2663 out_hdr = (struct sadb_msg *) out_skb->data;
83321d6b 2664 out_hdr->sadb_msg_version = pfk->dump.msg_version;
1da177e4
LT		 2665 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2666 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2667 out_hdr->sadb_msg_errno = 0;
12a169e7 2668 out_hdr->sadb_msg_seq = count + 1;
15e47304 2669 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
12a169e7
HX		 2670
2671 if (pfk->dump.skb)
2672 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
07fb0f17 2673 &pfk->sk, sock_net(&pfk->sk));
12a169e7
HX		 2674 pfk->dump.skb = out_skb;
2675
1da177e4
LT		 2676 return 0;
2677}
2678
83321d6b
TT		 2679static int pfkey_dump_sp(struct pfkey_sock *pfk)
2680{
07fb0f17
AD		 2681 struct net *net = sock_net(&pfk->sk);
2682 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
83321d6b
TT		 2683}
2684
2685static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2686{
283bc9f3
FD		 2687 struct net *net = sock_net((struct sock *)pfk);
2688
2689 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
83321d6b
TT		 2690}
2691
4c93fbb0 2692static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
1da177e4 2693{
83321d6b 2694 struct pfkey_sock *pfk = pfkey_sk(sk);
4c563f76 2695
83321d6b
TT		 2696 if (pfk->dump.dump != NULL)
2697 return -EBUSY;
1da177e4 2698
83321d6b 2699 pfk->dump.msg_version = hdr->sadb_msg_version;
15e47304 2700 pfk->dump.msg_portid = hdr->sadb_msg_pid;
83321d6b
TT		 2701 pfk->dump.dump = pfkey_dump_sp;
2702 pfk->dump.done = pfkey_dump_sp_done;
2703 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2704
2705 return pfkey_do_dump(pfk);
1da177e4
LT		 2706}
2707
214e005b 2708static int key_notify_policy_flush(const struct km_event *c)
1da177e4
LT		 2709{
2710 struct sk_buff *skb_out;
26b15dad 2711 struct sadb_msg *hdr;
1da177e4 2712
26b15dad 2713 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1da177e4
LT		 2714 if (!skb_out)
2715 return -ENOBUFS;
26b15dad 2716 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
151bb0ff 2717 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
26b15dad 2718 hdr->sadb_msg_seq = c->seq;
15e47304 2719 hdr->sadb_msg_pid = c->portid;
26b15dad
JHS		 2720 hdr->sadb_msg_version = PF_KEY_V2;
2721 hdr->sadb_msg_errno = (uint8_t) 0;
85dfb745 2722 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
26b15dad 2723 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
a5cc68f3 2724 hdr->sadb_msg_reserved = 0;
07fb0f17 2725 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
26b15dad 2726 return 0;
1da177e4 2727
26b15dad
JHS		 2728}
2729
4c93fbb0 2730static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
26b15dad 2731{
07fb0f17 2732 struct net *net = sock_net(sk);
26b15dad 2733 struct km_event c;
161a09e7 2734 struct xfrm_audit audit_info;
8be987d7 2735 int err, err2;
1da177e4 2736
0c11b942 2737 audit_info.loginuid = audit_get_loginuid(current);
2532386f 2738 audit_info.sessionid = audit_get_sessionid(current);
161a09e7 2739 audit_info.secid = 0;
07fb0f17 2740 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
8be987d7 2741 err2 = unicast_flush_resp(sk, hdr);
2f1eb65f
JHS		 2742 if (err || err2) {
2743 if (err == -ESRCH) /* empty table - old silent behavior */
2744 return 0;
2745 return err;
2746 }
8be987d7 2747
f7b6983f 2748 c.data.type = XFRM_POLICY_TYPE_MAIN;
f60f6b8f 2749 c.event = XFRM_MSG_FLUSHPOLICY;
15e47304 2750 c.portid = hdr->sadb_msg_pid;
26b15dad 2751 c.seq = hdr->sadb_msg_seq;
07fb0f17 2752 c.net = net;
26b15dad 2753 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2754
2755 return 0;
2756}
2757
2758typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
4c93fbb0 2759 const struct sadb_msg *hdr, void * const *ext_hdrs);
8603b955 2760static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
1da177e4
LT		 2761 [SADB_RESERVED] = pfkey_reserved,
2762 [SADB_GETSPI] = pfkey_getspi,
2763 [SADB_UPDATE] = pfkey_add,
2764 [SADB_ADD] = pfkey_add,
2765 [SADB_DELETE] = pfkey_delete,
2766 [SADB_GET] = pfkey_get,
2767 [SADB_ACQUIRE] = pfkey_acquire,
2768 [SADB_REGISTER] = pfkey_register,
2769 [SADB_EXPIRE] = NULL,
2770 [SADB_FLUSH] = pfkey_flush,
2771 [SADB_DUMP] = pfkey_dump,
2772 [SADB_X_PROMISC] = pfkey_promisc,
2773 [SADB_X_PCHANGE] = NULL,
2774 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2775 [SADB_X_SPDADD] = pfkey_spdadd,
2776 [SADB_X_SPDDELETE] = pfkey_spddelete,
2777 [SADB_X_SPDGET] = pfkey_spdget,
2778 [SADB_X_SPDACQUIRE] = NULL,
2779 [SADB_X_SPDDUMP] = pfkey_spddump,
2780 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2781 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2782 [SADB_X_SPDDELETE2] = pfkey_spdget,
08de61be 2783 [SADB_X_MIGRATE] = pfkey_migrate,
1da177e4
LT		 2784};
2785
4c93fbb0 2786static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
1da177e4
LT		 2787{
2788 void *ext_hdrs[SADB_EXT_MAX];
2789 int err;
2790
2791 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
07fb0f17 2792 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
1da177e4
LT		 2793
2794 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2795 err = parse_exthdrs(skb, hdr, ext_hdrs);
2796 if (!err) {
2797 err = -EOPNOTSUPP;
2798 if (pfkey_funcs[hdr->sadb_msg_type])
2799 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2800 }
2801 return err;
2802}
2803
2804static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2805{
2806 struct sadb_msg *hdr = NULL;
2807
2808 if (skb->len < sizeof(*hdr)) {
2809 *errp = -EMSGSIZE;
2810 } else {
2811 hdr = (struct sadb_msg *) skb->data;
2812 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2813 hdr->sadb_msg_reserved != 0 ||
2814 (hdr->sadb_msg_type <= SADB_RESERVED ||
2815 hdr->sadb_msg_type > SADB_MAX)) {
2816 hdr = NULL;
2817 *errp = -EINVAL;
2818 } else if (hdr->sadb_msg_len != (skb->len /
2819 sizeof(uint64_t)) ||
2820 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2821 sizeof(uint64_t))) {
2822 hdr = NULL;
2823 *errp = -EMSGSIZE;
2824 } else {
2825 *errp = 0;
2826 }
2827 }
2828 return hdr;
2829}
2830
4c93fbb0
DM		 2831static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2832 const struct xfrm_algo_desc *d)
1da177e4 2833{
f398035f
HX		 2834 unsigned int id = d->desc.sadb_alg_id;
2835
2836 if (id >= sizeof(t->aalgos) * 8)
2837 return 0;
2838
2839 return (t->aalgos >> id) & 1;
1da177e4
LT		 2840}
2841
4c93fbb0
DM		 2842static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2843 const struct xfrm_algo_desc *d)
1da177e4 2844{
f398035f
HX		 2845 unsigned int id = d->desc.sadb_alg_id;
2846
2847 if (id >= sizeof(t->ealgos) * 8)
2848 return 0;
2849
2850 return (t->ealgos >> id) & 1;
1da177e4
LT		 2851}
2852
4c93fbb0 2853static int count_ah_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2854{
2855 int i, sz = 0;
2856
2857 for (i = 0; ; i++) {
4c93fbb0 2858 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2859 if (!aalg)
2860 break;
7e50f84c
JK		 2861 if (!aalg->pfkey_supported)
2862 continue;
1da177e4
LT		 2863 if (aalg_tmpl_set(t, aalg) && aalg->available)
2864 sz += sizeof(struct sadb_comb);
2865 }
2866 return sz + sizeof(struct sadb_prop);
2867}
2868
4c93fbb0 2869static int count_esp_combs(const struct xfrm_tmpl *t)
1da177e4
LT		 2870{
2871 int i, k, sz = 0;
2872
2873 for (i = 0; ; i++) {
4c93fbb0 2874 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2875 if (!ealg)
2876 break;
8ff24541 2877
7e50f84c
JK		 2878 if (!ealg->pfkey_supported)
2879 continue;
2880
1da177e4
LT		 2881 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2882 continue;
8ff24541 2883
1da177e4 2884 for (k = 1; ; k++) {
4c93fbb0 2885 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2886 if (!aalg)
2887 break;
8ff24541 2888
7e50f84c
JK		 2889 if (!aalg->pfkey_supported)
2890 continue;
2891
1da177e4
LT		 2892 if (aalg_tmpl_set(t, aalg) && aalg->available)
2893 sz += sizeof(struct sadb_comb);
2894 }
2895 }
2896 return sz + sizeof(struct sadb_prop);
2897}
2898
4c93fbb0 2899static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2900{
2901 struct sadb_prop *p;
2902 int i;
2903
2904 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2905 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2906 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2907 p->sadb_prop_replay = 32;
2908 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2909
2910 for (i = 0; ; i++) {
4c93fbb0 2911 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1da177e4
LT		 2912 if (!aalg)
2913 break;
2914
7e50f84c
JK		 2915 if (!aalg->pfkey_supported)
2916 continue;
2917
1da177e4
LT		 2918 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2919 struct sadb_comb *c;
2920 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2921 memset(c, 0, sizeof(*c));
2922 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2923 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2924 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2925 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2926 c->sadb_comb_hard_addtime = 24*60*60;
2927 c->sadb_comb_soft_addtime = 20*60*60;
2928 c->sadb_comb_hard_usetime = 8*60*60;
2929 c->sadb_comb_soft_usetime = 7*60*60;
2930 }
2931 }
2932}
2933
4c93fbb0 2934static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
1da177e4
LT		 2935{
2936 struct sadb_prop *p;
2937 int i, k;
2938
2939 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2940 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2941 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2942 p->sadb_prop_replay = 32;
2943 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2944
2945 for (i=0; ; i++) {
4c93fbb0 2946 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1da177e4
LT		 2947 if (!ealg)
2948 break;
8ff24541 2949
7e50f84c
JK		 2950 if (!ealg->pfkey_supported)
2951 continue;
2952
1da177e4
LT		 2953 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2954 continue;
8ff24541 2955
1da177e4
LT		 2956 for (k = 1; ; k++) {
2957 struct sadb_comb *c;
4c93fbb0 2958 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
1da177e4
LT		 2959 if (!aalg)
2960 break;
7e50f84c
JK		 2961 if (!aalg->pfkey_supported)
2962 continue;
1da177e4
LT		 2963 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2964 continue;
2965 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2966 memset(c, 0, sizeof(*c));
2967 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2968 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2969 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2970 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2971 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2972 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2973 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2974 c->sadb_comb_hard_addtime = 24*60*60;
2975 c->sadb_comb_soft_addtime = 20*60*60;
2976 c->sadb_comb_hard_usetime = 8*60*60;
2977 c->sadb_comb_soft_usetime = 7*60*60;
2978 }
2979 }
2980}
2981
214e005b 2982static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
26b15dad
JHS		 2983{
2984 return 0;
2985}
2986
214e005b 2987static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2988{
2989 struct sk_buff *out_skb;
2990 struct sadb_msg *out_hdr;
26b15dad
JHS		 2991 int hard;
2992 int hsc;
2993
bf08867f 2994 hard = c->data.hard;
26b15dad
JHS		 2995 if (hard)
2996 hsc = 2;
2997 else
2998 hsc = 1;
1da177e4 2999
050f009e 3000 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
1da177e4
LT		 3001 if (IS_ERR(out_skb))
3002 return PTR_ERR(out_skb);
3003
3004 out_hdr = (struct sadb_msg *) out_skb->data;
3005 out_hdr->sadb_msg_version = PF_KEY_V2;
3006 out_hdr->sadb_msg_type = SADB_EXPIRE;
3007 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3008 out_hdr->sadb_msg_errno = 0;
3009 out_hdr->sadb_msg_reserved = 0;
3010 out_hdr->sadb_msg_seq = 0;
3011 out_hdr->sadb_msg_pid = 0;
3012
07fb0f17 3013 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3014 return 0;
3015}
3016
214e005b 3017static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad 3018{
07fb0f17 3019 struct net *net = x ? xs_net(x) : c->net;
3fa87a32
AD		 3020 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3021
3022 if (atomic_read(&net_pfkey->socks_nr) == 0)
99c6f60e
JHS		 3023 return 0;
3024
26b15dad 3025 switch (c->event) {
f60f6b8f 3026 case XFRM_MSG_EXPIRE:
26b15dad 3027 return key_notify_sa_expire(x, c);
f60f6b8f
HX		 3028 case XFRM_MSG_DELSA:
3029 case XFRM_MSG_NEWSA:
3030 case XFRM_MSG_UPDSA:
26b15dad 3031 return key_notify_sa(x, c);
f60f6b8f 3032 case XFRM_MSG_FLUSHSA:
26b15dad 3033 return key_notify_sa_flush(c);
d51d081d
JHS		 3034 case XFRM_MSG_NEWAE: /* not yet supported */
3035 break;
26b15dad 3036 default:
207024b9 3037 pr_err("pfkey: Unknown SA event %d\n", c->event);
26b15dad
JHS		 3038 break;
3039 }
3040
3041 return 0;
3042}
3043
214e005b 3044static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 3045{
f7b6983f
MN		 3046 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3047 return 0;
3048
26b15dad 3049 switch (c->event) {
f60f6b8f 3050 case XFRM_MSG_POLEXPIRE:
26b15dad 3051 return key_notify_policy_expire(xp, c);
f60f6b8f
HX		 3052 case XFRM_MSG_DELPOLICY:
3053 case XFRM_MSG_NEWPOLICY:
3054 case XFRM_MSG_UPDPOLICY:
26b15dad 3055 return key_notify_policy(xp, dir, c);
f60f6b8f 3056 case XFRM_MSG_FLUSHPOLICY:
f7b6983f
MN		 3057 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3058 break;
26b15dad
JHS		 3059 return key_notify_policy_flush(c);
3060 default:
207024b9 3061 pr_err("pfkey: Unknown policy event %d\n", c->event);
26b15dad
JHS		 3062 break;
3063 }
3064
3065 return 0;
3066}
3067
1da177e4
LT		 3068static u32 get_acqseq(void)
3069{
3070 u32 res;
28aecb9d 3071 static atomic_t acqseq;
1da177e4 3072
28aecb9d
ED		 3073 do {
3074 res = atomic_inc_return(&acqseq);
3075 } while (!res);
1da177e4
LT		 3076 return res;
3077}
3078
0f24558e
HG		 3079static bool pfkey_is_alive(const struct km_event *c)
3080{
3081 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3082 struct sock *sk;
3083 bool is_alive = false;
3084
3085 rcu_read_lock();
3086 sk_for_each_rcu(sk, &net_pfkey->table) {
3087 if (pfkey_sk(sk)->registered) {
3088 is_alive = true;
3089 break;
3090 }
3091 }
3092 rcu_read_unlock();
3093
3094 return is_alive;
3095}
3096
65e0736b 3097static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
1da177e4
LT		 3098{
3099 struct sk_buff *skb;
3100 struct sadb_msg *hdr;
3101 struct sadb_address *addr;
3102 struct sadb_x_policy *pol;
1da177e4
LT		 3103 int sockaddr_size;
3104 int size;
4e2ba18e
VY		 3105 struct sadb_x_sec_ctx *sec_ctx;
3106 struct xfrm_sec_ctx *xfrm_ctx;
3107 int ctx_size = 0;
8ff24541 3108
1da177e4
LT		 3109 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3110 if (!sockaddr_size)
3111 return -EINVAL;
3112
3113 size = sizeof(struct sadb_msg) +
3114 (sizeof(struct sadb_address) * 2) +
3115 (sockaddr_size * 2) +
3116 sizeof(struct sadb_x_policy);
8ff24541 3117
1da177e4
LT		 3118 if (x->id.proto == IPPROTO_AH)
3119 size += count_ah_combs(t);
3120 else if (x->id.proto == IPPROTO_ESP)
3121 size += count_esp_combs(t);
3122
4e2ba18e
VY		 3123 if ((xfrm_ctx = x->security)) {
3124 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3125 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3126 }
3127
1da177e4
LT		 3128 skb = alloc_skb(size + 16, GFP_ATOMIC);
3129 if (skb == NULL)
3130 return -ENOMEM;
8ff24541 3131
1da177e4
LT		 3132 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3133 hdr->sadb_msg_version = PF_KEY_V2;
3134 hdr->sadb_msg_type = SADB_ACQUIRE;
3135 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3136 hdr->sadb_msg_len = size / sizeof(uint64_t);
3137 hdr->sadb_msg_errno = 0;
3138 hdr->sadb_msg_reserved = 0;
3139 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3140 hdr->sadb_msg_pid = 0;
3141
3142 /* src address */
8ff24541 3143 addr = (struct sadb_address*) skb_put(skb,
1da177e4 3144 sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3145 addr->sadb_address_len =
1da177e4
LT		 3146 (sizeof(struct sadb_address)+sockaddr_size)/
3147 sizeof(uint64_t);
3148 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3149 addr->sadb_address_proto = 0;
3150 addr->sadb_address_reserved = 0;
e5b56652
YH		 3151 addr->sadb_address_prefixlen =
3152 pfkey_sockaddr_fill(&x->props.saddr, 0,
3153 (struct sockaddr *) (addr + 1),
3154 x->props.family);
3155 if (!addr->sadb_address_prefixlen)
1da177e4 3156 BUG();
8ff24541 3157
1da177e4 3158 /* dst address */
8ff24541 3159 addr = (struct sadb_address*) skb_put(skb,
1da177e4
LT		 3160 sizeof(struct sadb_address)+sockaddr_size);
3161 addr->sadb_address_len =
3162 (sizeof(struct sadb_address)+sockaddr_size)/
3163 sizeof(uint64_t);
3164 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3165 addr->sadb_address_proto = 0;
3166 addr->sadb_address_reserved = 0;
e5b56652
YH		 3167 addr->sadb_address_prefixlen =
3168 pfkey_sockaddr_fill(&x->id.daddr, 0,
3169 (struct sockaddr *) (addr + 1),
3170 x->props.family);
3171 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3172 BUG();
3173
3174 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3175 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3176 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3177 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
65e0736b 3178 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
ff862a46 3179 pol->sadb_x_policy_reserved = 0;
1da177e4 3180 pol->sadb_x_policy_id = xp->index;
ff862a46 3181 pol->sadb_x_policy_priority = xp->priority;
1da177e4
LT		 3182
3183 /* Set sadb_comb's. */
3184 if (x->id.proto == IPPROTO_AH)
3185 dump_ah_combs(skb, t);
3186 else if (x->id.proto == IPPROTO_ESP)
3187 dump_esp_combs(skb, t);
3188
4e2ba18e
VY		 3189 /* security context */
3190 if (xfrm_ctx) {
3191 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3192 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3193 sec_ctx->sadb_x_sec_len =
3194 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3195 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3196 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3197 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3198 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3199 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3200 xfrm_ctx->ctx_len);
3201 }
3202
07fb0f17 3203 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3204}
3205
cb969f07 3206static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
8ff24541 3207 u8 *data, int len, int *dir)
1da177e4 3208{
07fb0f17 3209 struct net *net = sock_net(sk);
1da177e4
LT		 3210 struct xfrm_policy *xp;
3211 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
df71837d 3212 struct sadb_x_sec_ctx *sec_ctx;
1da177e4 3213
cb969f07 3214 switch (sk->sk_family) {
1da177e4
LT		 3215 case AF_INET:
3216 if (opt != IP_IPSEC_POLICY) {
3217 *dir = -EOPNOTSUPP;
3218 return NULL;
3219 }
3220 break;
dfd56b8b 3221#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 3222 case AF_INET6:
3223 if (opt != IPV6_IPSEC_POLICY) {
3224 *dir = -EOPNOTSUPP;
3225 return NULL;
3226 }
3227 break;
3228#endif
3229 default:
3230 *dir = -EINVAL;
3231 return NULL;
3232 }
3233
3234 *dir = -EINVAL;
3235
3236 if (len < sizeof(struct sadb_x_policy) ||
3237 pol->sadb_x_policy_len*8 > len ||
3238 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3239 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3240 return NULL;
3241
07fb0f17 3242 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3243 if (xp == NULL) {
3244 *dir = -ENOBUFS;
3245 return NULL;
3246 }
3247
3248 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3249 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3250
3251 xp->lft.soft_byte_limit = XFRM_INF;
3252 xp->lft.hard_byte_limit = XFRM_INF;
3253 xp->lft.soft_packet_limit = XFRM_INF;
3254 xp->lft.hard_packet_limit = XFRM_INF;
cb969f07 3255 xp->family = sk->sk_family;
1da177e4
LT		 3256
3257 xp->xfrm_nr = 0;
3258 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3259 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3260 goto out;
3261
df71837d
TJ		 3262 /* security context too */
3263 if (len >= (pol->sadb_x_policy_len*8 +
3264 sizeof(struct sadb_x_sec_ctx))) {
3265 char *p = (char *)pol;
3266 struct xfrm_user_sec_ctx *uctx;
3267
3268 p += pol->sadb_x_policy_len*8;
3269 sec_ctx = (struct sadb_x_sec_ctx *)p;
3270 if (len < pol->sadb_x_policy_len*8 +
cb969f07
VY		 3271 sec_ctx->sadb_x_sec_len) {
3272 *dir = -EINVAL;
df71837d 3273 goto out;
cb969f07 3274 }
df71837d
TJ		 3275 if ((*dir = verify_sec_ctx_len(p)))
3276 goto out;
3277 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
03e1ad7b 3278 *dir = security_xfrm_policy_alloc(&xp->security, uctx);
df71837d
TJ		 3279 kfree(uctx);
3280
3281 if (*dir)
3282 goto out;
3283 }
3284
1da177e4
LT		 3285 *dir = pol->sadb_x_policy_dir-1;
3286 return xp;
3287
3288out:
70e90679 3289 xp->walk.dead = 1;
64c31b3f 3290 xfrm_policy_destroy(xp);
1da177e4
LT		 3291 return NULL;
3292}
3293
5d36b180 3294static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
1da177e4
LT		 3295{
3296 struct sk_buff *skb;
3297 struct sadb_msg *hdr;
3298 struct sadb_sa *sa;
3299 struct sadb_address *addr;
3300 struct sadb_x_nat_t_port *n_port;
1da177e4
LT		 3301 int sockaddr_size;
3302 int size;
3303 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3304 struct xfrm_encap_tmpl *natt = NULL;
3305
3306 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3307 if (!sockaddr_size)
3308 return -EINVAL;
3309
3310 if (!satype)
3311 return -EINVAL;
3312
3313 if (!x->encap)
3314 return -EINVAL;
3315
3316 natt = x->encap;
3317
3318 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3319 *
3320 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3321 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3322 */
8ff24541 3323
1da177e4
LT		 3324 size = sizeof(struct sadb_msg) +
3325 sizeof(struct sadb_sa) +
3326 (sizeof(struct sadb_address) * 2) +
3327 (sockaddr_size * 2) +
3328 (sizeof(struct sadb_x_nat_t_port) * 2);
8ff24541 3329
1da177e4
LT		 3330 skb = alloc_skb(size + 16, GFP_ATOMIC);
3331 if (skb == NULL)
3332 return -ENOMEM;
8ff24541 3333
1da177e4
LT		 3334 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3335 hdr->sadb_msg_version = PF_KEY_V2;
3336 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3337 hdr->sadb_msg_satype = satype;
3338 hdr->sadb_msg_len = size / sizeof(uint64_t);
3339 hdr->sadb_msg_errno = 0;
3340 hdr->sadb_msg_reserved = 0;
3341 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3342 hdr->sadb_msg_pid = 0;
3343
3344 /* SA */
3345 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3346 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3347 sa->sadb_sa_exttype = SADB_EXT_SA;
3348 sa->sadb_sa_spi = x->id.spi;
3349 sa->sadb_sa_replay = 0;
3350 sa->sadb_sa_state = 0;
3351 sa->sadb_sa_auth = 0;
3352 sa->sadb_sa_encrypt = 0;
3353 sa->sadb_sa_flags = 0;
3354
3355 /* ADDRESS_SRC (old addr) */
3356 addr = (struct sadb_address*)
3357 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3358 addr->sadb_address_len =
1da177e4
LT		 3359 (sizeof(struct sadb_address)+sockaddr_size)/
3360 sizeof(uint64_t);
3361 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3362 addr->sadb_address_proto = 0;
3363 addr->sadb_address_reserved = 0;
e5b56652
YH		 3364 addr->sadb_address_prefixlen =
3365 pfkey_sockaddr_fill(&x->props.saddr, 0,
3366 (struct sockaddr *) (addr + 1),
3367 x->props.family);
3368 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3369 BUG();
3370
3371 /* NAT_T_SPORT (old port) */
3372 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3373 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3374 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3375 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3376 n_port->sadb_x_nat_t_port_reserved = 0;
3377
3378 /* ADDRESS_DST (new addr) */
3379 addr = (struct sadb_address*)
3380 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
8ff24541 3381 addr->sadb_address_len =
1da177e4
LT		 3382 (sizeof(struct sadb_address)+sockaddr_size)/
3383 sizeof(uint64_t);
3384 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3385 addr->sadb_address_proto = 0;
3386 addr->sadb_address_reserved = 0;
e5b56652
YH		 3387 addr->sadb_address_prefixlen =
3388 pfkey_sockaddr_fill(ipaddr, 0,
3389 (struct sockaddr *) (addr + 1),
3390 x->props.family);
3391 if (!addr->sadb_address_prefixlen)
1da177e4
LT		 3392 BUG();
3393
3394 /* NAT_T_DPORT (new port) */
3395 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3396 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3397 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3398 n_port->sadb_x_nat_t_port_port = sport;
3399 n_port->sadb_x_nat_t_port_reserved = 0;
3400
07fb0f17 3401 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
1da177e4
LT		 3402}
3403
08de61be
SS		 3404#ifdef CONFIG_NET_KEY_MIGRATE
3405static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
183cad12 3406 const struct xfrm_selector *sel)
08de61be
SS		 3407{
3408 struct sadb_address *addr;
08de61be
SS		 3409 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3410 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3411 addr->sadb_address_exttype = type;
3412 addr->sadb_address_proto = sel->proto;
3413 addr->sadb_address_reserved = 0;
3414
3415 switch (type) {
3416 case SADB_EXT_ADDRESS_SRC:
e5b56652
YH		 3417 addr->sadb_address_prefixlen = sel->prefixlen_s;
3418 pfkey_sockaddr_fill(&sel->saddr, 0,
3419 (struct sockaddr *)(addr + 1),
3420 sel->family);
08de61be
SS		 3421 break;
3422 case SADB_EXT_ADDRESS_DST:
e5b56652
YH		 3423 addr->sadb_address_prefixlen = sel->prefixlen_d;
3424 pfkey_sockaddr_fill(&sel->daddr, 0,
3425 (struct sockaddr *)(addr + 1),
3426 sel->family);
08de61be
SS		 3427 break;
3428 default:
3429 return -EINVAL;
3430 }
3431
3432 return 0;
3433}
3434
13c1d189 3435
183cad12 3436static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
13c1d189
AE		 3437{
3438 struct sadb_x_kmaddress *kma;
3439 u8 *sa;
3440 int family = k->family;
3441 int socklen = pfkey_sockaddr_len(family);
3442 int size_req;
3443
3444 size_req = (sizeof(struct sadb_x_kmaddress) +
3445 pfkey_sockaddr_pair_size(family));
3446
3447 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3448 memset(kma, 0, size_req);
3449 kma->sadb_x_kmaddress_len = size_req / 8;
3450 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3451 kma->sadb_x_kmaddress_reserved = k->reserved;
3452
3453 sa = (u8 *)(kma + 1);
3454 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3455 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3456 return -EINVAL;
3457
3458 return 0;
3459}
3460
08de61be
SS		 3461static int set_ipsecrequest(struct sk_buff *skb,
3462 uint8_t proto, uint8_t mode, int level,
3463 uint32_t reqid, uint8_t family,
183cad12 3464 const xfrm_address_t *src, const xfrm_address_t *dst)
08de61be
SS		 3465{
3466 struct sadb_x_ipsecrequest *rq;
e5b56652
YH		 3467 u8 *sa;
3468 int socklen = pfkey_sockaddr_len(family);
08de61be
SS		 3469 int size_req;
3470
3471 size_req = sizeof(struct sadb_x_ipsecrequest) +
3472 pfkey_sockaddr_pair_size(family);
3473
3474 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3475 memset(rq, 0, size_req);
3476 rq->sadb_x_ipsecrequest_len = size_req;
3477 rq->sadb_x_ipsecrequest_proto = proto;
3478 rq->sadb_x_ipsecrequest_mode = mode;
3479 rq->sadb_x_ipsecrequest_level = level;
3480 rq->sadb_x_ipsecrequest_reqid = reqid;
3481
e5b56652
YH		 3482 sa = (u8 *) (rq + 1);
3483 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3484 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
08de61be 3485 return -EINVAL;
08de61be
SS		 3486
3487 return 0;
3488}
3489#endif
3490
3491#ifdef CONFIG_NET_KEY_MIGRATE
183cad12
DM		 3492static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3493 const struct xfrm_migrate *m, int num_bundles,
3494 const struct xfrm_kmaddress *k)
08de61be
SS		 3495{
3496 int i;
3497 int sasize_sel;
3498 int size = 0;
3499 int size_pol = 0;
3500 struct sk_buff *skb;
3501 struct sadb_msg *hdr;
3502 struct sadb_x_policy *pol;
183cad12 3503 const struct xfrm_migrate *mp;
08de61be
SS		 3504
3505 if (type != XFRM_POLICY_TYPE_MAIN)
3506 return 0;
3507
3508 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3509 return -EINVAL;
3510
13c1d189
AE		 3511 if (k != NULL) {
3512 /* addresses for KM */
3513 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3514 pfkey_sockaddr_pair_size(k->family));
3515 }
3516
08de61be
SS		 3517 /* selector */
3518 sasize_sel = pfkey_sockaddr_size(sel->family);
3519 if (!sasize_sel)
3520 return -EINVAL;
3521 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3522
3523 /* policy info */
3524 size_pol += sizeof(struct sadb_x_policy);
3525
3526 /* ipsecrequests */
3527 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3528 /* old locator pair */
3529 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3530 pfkey_sockaddr_pair_size(mp->old_family);
3531 /* new locator pair */
3532 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3533 pfkey_sockaddr_pair_size(mp->new_family);
3534 }
3535
3536 size += sizeof(struct sadb_msg) + size_pol;
3537
3538 /* alloc buffer */
3539 skb = alloc_skb(size, GFP_ATOMIC);
3540 if (skb == NULL)
3541 return -ENOMEM;
3542
3543 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3544 hdr->sadb_msg_version = PF_KEY_V2;
3545 hdr->sadb_msg_type = SADB_X_MIGRATE;
3546 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3547 hdr->sadb_msg_len = size / 8;
3548 hdr->sadb_msg_errno = 0;
3549 hdr->sadb_msg_reserved = 0;
3550 hdr->sadb_msg_seq = 0;
3551 hdr->sadb_msg_pid = 0;
3552
13c1d189
AE		 3553 /* Addresses to be used by KM for negotiation, if ext is available */
3554 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
89eb06f1 3555 goto err;
13c1d189 3556
08de61be
SS		 3557 /* selector src */
3558 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3559
3560 /* selector dst */
3561 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3562
3563 /* policy information */
3564 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3565 pol->sadb_x_policy_len = size_pol / 8;
3566 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3567 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3568 pol->sadb_x_policy_dir = dir + 1;
ff862a46 3569 pol->sadb_x_policy_reserved = 0;
08de61be
SS		 3570 pol->sadb_x_policy_id = 0;
3571 pol->sadb_x_policy_priority = 0;
3572
3573 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3574 /* old ipsecrequest */
55569ce2
KM		 3575 int mode = pfkey_mode_from_xfrm(mp->mode);
3576 if (mode < 0)
d4782c32 3577 goto err;
55569ce2 3578 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3579 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3580 mp->reqid, mp->old_family,
d4782c32
PM		 3581 &mp->old_saddr, &mp->old_daddr) < 0)
3582 goto err;
08de61be
SS		 3583
3584 /* new ipsecrequest */
55569ce2 3585 if (set_ipsecrequest(skb, mp->proto, mode,
08de61be
SS		 3586 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3587 mp->reqid, mp->new_family,
d4782c32
PM		 3588 &mp->new_saddr, &mp->new_daddr) < 0)
3589 goto err;
08de61be
SS		 3590 }
3591
3592 /* broadcast migrate message to sockets */
07fb0f17 3593 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
08de61be
SS		 3594
3595 return 0;
d4782c32
PM		 3596
3597err:
3598 kfree_skb(skb);
3599 return -EINVAL;
08de61be
SS		 3600}
3601#else
183cad12
DM		 3602static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3603 const struct xfrm_migrate *m, int num_bundles,
3604 const struct xfrm_kmaddress *k)
08de61be
SS		 3605{
3606 return -ENOPROTOOPT;
3607}
3608#endif
3609
1da177e4
LT		 3610static int pfkey_sendmsg(struct kiocb *kiocb,
3611 struct socket *sock, struct msghdr *msg, size_t len)
3612{
3613 struct sock *sk = sock->sk;
3614 struct sk_buff *skb = NULL;
3615 struct sadb_msg *hdr = NULL;
3616 int err;
283bc9f3 3617 struct net *net = sock_net(sk);
1da177e4
LT		 3618
3619 err = -EOPNOTSUPP;
3620 if (msg->msg_flags & MSG_OOB)
3621 goto out;
3622
3623 err = -EMSGSIZE;
95c96174 3624 if ((unsigned int)len > sk->sk_sndbuf - 32)
1da177e4
LT		 3625 goto out;
3626
3627 err = -ENOBUFS;
3628 skb = alloc_skb(len, GFP_KERNEL);
3629 if (skb == NULL)
3630 goto out;
3631
3632 err = -EFAULT;
3633 if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
3634 goto out;
3635
3636 hdr = pfkey_get_base_msg(skb, &err);
3637 if (!hdr)
3638 goto out;
3639
283bc9f3 3640 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
1da177e4 3641 err = pfkey_process(sk, skb, hdr);
283bc9f3 3642 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 3643
3644out:
3645 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3646 err = 0;
6f961068 3647 kfree_skb(skb);
1da177e4
LT		 3648
3649 return err ? : len;
3650}
3651
3652static int pfkey_recvmsg(struct kiocb *kiocb,
3653 struct socket *sock, struct msghdr *msg, size_t len,
3654 int flags)
3655{
3656 struct sock *sk = sock->sk;
83321d6b 3657 struct pfkey_sock *pfk = pfkey_sk(sk);
1da177e4
LT		 3658 struct sk_buff *skb;
3659 int copied, err;
3660
3661 err = -EINVAL;
3662 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3663 goto out;
3664
1da177e4
LT		 3665 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3666 if (skb == NULL)
3667 goto out;
3668
3669 copied = skb->len;
3670 if (copied > len) {
3671 msg->msg_flags |= MSG_TRUNC;
3672 copied = len;
3673 }
3674
badff6d0 3675 skb_reset_transport_header(skb);
1da177e4
LT		 3676 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
3677 if (err)
3678 goto out_free;
3679
3b885787 3680 sock_recv_ts_and_drops(msg, sk, skb);
1da177e4
LT		 3681
3682 err = (flags & MSG_TRUNC) ? skb->len : copied;
3683
83321d6b
TT		 3684 if (pfk->dump.dump != NULL &&
3685 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3686 pfkey_do_dump(pfk);
3687
1da177e4
LT		 3688out_free:
3689 skb_free_datagram(sk, skb);
3690out:
3691 return err;
3692}
3693
90ddc4f0 3694static const struct proto_ops pfkey_ops = {
1da177e4
LT		 3695 .family = PF_KEY,
3696 .owner = THIS_MODULE,
3697 /* Operations that make no sense on pfkey sockets. */
3698 .bind = sock_no_bind,
3699 .connect = sock_no_connect,
3700 .socketpair = sock_no_socketpair,
3701 .accept = sock_no_accept,
3702 .getname = sock_no_getname,
3703 .ioctl = sock_no_ioctl,
3704 .listen = sock_no_listen,
3705 .shutdown = sock_no_shutdown,
3706 .setsockopt = sock_no_setsockopt,
3707 .getsockopt = sock_no_getsockopt,
3708 .mmap = sock_no_mmap,
3709 .sendpage = sock_no_sendpage,
3710
3711 /* Now the operations that really occur. */
3712 .release = pfkey_release,
3713 .poll = datagram_poll,
3714 .sendmsg = pfkey_sendmsg,
3715 .recvmsg = pfkey_recvmsg,
3716};
3717
ec1b4cf7 3718static const struct net_proto_family pfkey_family_ops = {
1da177e4
LT		 3719 .family = PF_KEY,
3720 .create = pfkey_create,
3721 .owner = THIS_MODULE,
3722};
3723
3724#ifdef CONFIG_PROC_FS
bd2f7476 3725static int pfkey_seq_show(struct seq_file *f, void *v)
1da177e4 3726{
27b5b865 3727 struct sock *s = sk_entry(v);
1da177e4 3728
bd2f7476
PE		 3729 if (v == SEQ_START_TOKEN)
3730 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3731 else
71338aa7 3732 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
1da177e4
LT		 3733 s,
3734 atomic_read(&s->sk_refcnt),
31e6d363
ED		 3735 sk_rmem_alloc_get(s),
3736 sk_wmem_alloc_get(s),
a7cb5a49 3737 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
1da177e4
LT		 3738 sock_i_ino(s)
3739 );
bd2f7476
PE		 3740 return 0;
3741}
3742
3743static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
ada440e3 3744 __acquires(rcu)
bd2f7476 3745{
7013ec30 3746 struct net *net = seq_file_net(f);
3fa87a32 3747 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
1da177e4 3748
7f6b9dbd 3749 rcu_read_lock();
3750 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
bd2f7476
PE		 3751}
3752
3753static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3754{
7013ec30 3755 struct net *net = seq_file_net(f);
3fa87a32
AD		 3756 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3757
7f6b9dbd 3758 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
bd2f7476 3759}
1da177e4 3760
bd2f7476 3761static void pfkey_seq_stop(struct seq_file *f, void *v)
ada440e3 3762 __releases(rcu)
bd2f7476 3763{
7f6b9dbd 3764 rcu_read_unlock();
bd2f7476 3765}
1da177e4 3766
98147d52 3767static const struct seq_operations pfkey_seq_ops = {
bd2f7476
PE		 3768 .start = pfkey_seq_start,
3769 .next = pfkey_seq_next,
3770 .stop = pfkey_seq_stop,
3771 .show = pfkey_seq_show,
3772};
1da177e4 3773
bd2f7476
PE		 3774static int pfkey_seq_open(struct inode *inode, struct file *file)
3775{
7013ec30
AD		 3776 return seq_open_net(inode, file, &pfkey_seq_ops,
3777 sizeof(struct seq_net_private));
1da177e4 3778}
61145aa1 3779
5ca1b998 3780static const struct file_operations pfkey_proc_ops = {
bd2f7476
PE		 3781 .open = pfkey_seq_open,
3782 .read = seq_read,
3783 .llseek = seq_lseek,
7013ec30 3784 .release = seq_release_net,
bd2f7476
PE		 3785};
3786
7013ec30 3787static int __net_init pfkey_init_proc(struct net *net)
61145aa1 3788{
bd2f7476
PE		 3789 struct proc_dir_entry *e;
3790
d4beaa66 3791 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
bd2f7476 3792 if (e == NULL)
61145aa1 3793 return -ENOMEM;
bd2f7476 3794
bd2f7476 3795 return 0;
61145aa1
PE		 3796}
3797
2c8c1e72 3798static void __net_exit pfkey_exit_proc(struct net *net)
61145aa1 3799{
ece31ffd 3800 remove_proc_entry("pfkey", net->proc_net);
61145aa1
PE		 3801}
3802#else
2c8c1e72 3803static inline int pfkey_init_proc(struct net *net)
61145aa1
PE		 3804{
3805 return 0;
3806}
3807
2c8c1e72 3808static inline void pfkey_exit_proc(struct net *net)
61145aa1
PE		 3809{
3810}
1da177e4
LT		 3811#endif
3812
3813static struct xfrm_mgr pfkeyv2_mgr =
3814{
3815 .id = "pfkeyv2",
3816 .notify = pfkey_send_notify,
3817 .acquire = pfkey_send_acquire,
3818 .compile_policy = pfkey_compile_policy,
3819 .new_mapping = pfkey_send_new_mapping,
26b15dad 3820 .notify_policy = pfkey_send_policy_notify,
08de61be 3821 .migrate = pfkey_send_migrate,
0f24558e 3822 .is_alive = pfkey_is_alive,
1da177e4
LT		 3823};
3824
3fa87a32
AD		 3825static int __net_init pfkey_net_init(struct net *net)
3826{
23c049ca 3827 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3fa87a32
AD		 3828 int rv;
3829
3fa87a32
AD		 3830 INIT_HLIST_HEAD(&net_pfkey->table);
3831 atomic_set(&net_pfkey->socks_nr, 0);
23c049ca 3832
7013ec30 3833 rv = pfkey_init_proc(net);
3fa87a32 3834
3fa87a32
AD		 3835 return rv;
3836}
3837
3838static void __net_exit pfkey_net_exit(struct net *net)
3839{
3840 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3841
7013ec30 3842 pfkey_exit_proc(net);
3fa87a32 3843 BUG_ON(!hlist_empty(&net_pfkey->table));
3fa87a32
AD		 3844}
3845
3846static struct pernet_operations pfkey_net_ops = {
3847 .init = pfkey_net_init,
3848 .exit = pfkey_net_exit,
23c049ca
EB		 3849 .id = &pfkey_net_id,
3850 .size = sizeof(struct netns_pfkey),
3fa87a32
AD		 3851};
3852
1da177e4
LT		 3853static void __exit ipsec_pfkey_exit(void)
3854{
3855 xfrm_unregister_km(&pfkeyv2_mgr);
1da177e4 3856 sock_unregister(PF_KEY);
180211b8 3857 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3858 proto_unregister(&key_proto);
3859}
3860
3861static int __init ipsec_pfkey_init(void)
3862{
3863 int err = proto_register(&key_proto, 0);
3864
3865 if (err != 0)
3866 goto out;
3867
180211b8 3868 err = register_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3869 if (err != 0)
3870 goto out_unregister_key_proto;
180211b8
AD		 3871 err = sock_register(&pfkey_family_ops);
3872 if (err != 0)
3873 goto out_unregister_pernet;
1da177e4
LT		 3874 err = xfrm_register_km(&pfkeyv2_mgr);
3875 if (err != 0)
7013ec30 3876 goto out_sock_unregister;
1da177e4
LT		 3877out:
3878 return err;
180211b8 3879
1da177e4 3880out_sock_unregister:
1da177e4 3881 sock_unregister(PF_KEY);
180211b8
AD		 3882out_unregister_pernet:
3883 unregister_pernet_subsys(&pfkey_net_ops);
1da177e4
LT		 3884out_unregister_key_proto:
3885 proto_unregister(&key_proto);
3886 goto out;
3887}
3888
3889module_init(ipsec_pfkey_init);
3890module_exit(ipsec_pfkey_exit);
3891MODULE_LICENSE("GPL");
3892MODULE_ALIAS_NETPROTO(PF_KEY);
Linux kernel - Deliverables
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