blob: f8ac939d52b4b83ce3720e274f33461347029661 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Randy Dunlap4fc268d2006-01-11 12:17:47 -080017#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020030#include <net/net_namespace.h>
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -080031#include <net/netns/generic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#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
Eric Dumazetf99189b2009-11-17 10:42:49 +000039static int pfkey_net_id __read_mostly;
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -080040struct netns_pfkey {
41 /* List of all pfkey sockets. */
42 struct hlist_head table;
43 atomic_t socks_nr;
44};
stephen hemminger7f6b9db2010-02-22 07:57:19 +000045static DEFINE_MUTEX(pfkey_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Jamal Hadi Salimbd557752010-02-22 16:20:22 -080047#define DUMMY_MARK 0
Mathias Krausee473fcb2013-06-26 23:56:58 +020048static const struct xfrm_mark dummy_mark = {0, 0};
Linus Torvalds1da177e2005-04-16 15:20:36 -070049struct pfkey_sock {
50 /* struct sock must be the first member of struct pfkey_sock */
51 struct sock sk;
52 int registered;
53 int promisc;
Timo Teras83321d62008-03-03 23:40:12 -080054
55 struct {
56 uint8_t msg_version;
Eric W. Biederman15e47302012-09-07 20:12:54 +000057 uint32_t msg_portid;
Timo Teras83321d62008-03-03 23:40:12 -080058 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;
Herbert Xu12a169e2008-10-01 07:03:24 -070064 struct sk_buff *skb;
Timo Teras83321d62008-03-03 23:40:12 -080065 } dump;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066};
67
68static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
69{
70 return (struct pfkey_sock *)sk;
71}
72
David S. Miller4c93fbb2011-02-25 18:07:06 -080073static int pfkey_can_dump(const struct sock *sk)
Timo Teras83321d62008-03-03 23:40:12 -080074{
75 if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
76 return 1;
77 return 0;
78}
79
Timo Teras05238202008-10-01 05:17:54 -070080static void pfkey_terminate_dump(struct pfkey_sock *pfk)
Timo Teras83321d62008-03-03 23:40:12 -080081{
Timo Teras05238202008-10-01 05:17:54 -070082 if (pfk->dump.dump) {
Herbert Xu12a169e2008-10-01 07:03:24 -070083 if (pfk->dump.skb) {
84 kfree_skb(pfk->dump.skb);
85 pfk->dump.skb = NULL;
86 }
Timo Teras05238202008-10-01 05:17:54 -070087 pfk->dump.done(pfk);
88 pfk->dump.dump = NULL;
89 pfk->dump.done = NULL;
90 }
Timo Teras83321d62008-03-03 23:40:12 -080091}
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093static void pfkey_sock_destruct(struct sock *sk)
94{
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -080095 struct net *net = sock_net(sk);
96 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
97
Timo Teras05238202008-10-01 05:17:54 -070098 pfkey_terminate_dump(pfkey_sk(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 skb_queue_purge(&sk->sk_receive_queue);
100
101 if (!sock_flag(sk, SOCK_DEAD)) {
stephen hemminger207024b2010-05-12 06:37:07 +0000102 pr_err("Attempt to release alive pfkey socket: %p\n", sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 return;
104 }
105
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700106 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
107 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -0800109 atomic_dec(&net_pfkey->socks_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800112static const struct proto_ops pfkey_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114static void pfkey_insert(struct sock *sk)
115{
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -0800116 struct net *net = sock_net(sk);
117 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
118
stephen hemminger7f6b9db2010-02-22 07:57:19 +0000119 mutex_lock(&pfkey_mutex);
120 sk_add_node_rcu(sk, &net_pfkey->table);
121 mutex_unlock(&pfkey_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122}
123
124static void pfkey_remove(struct sock *sk)
125{
stephen hemminger7f6b9db2010-02-22 07:57:19 +0000126 mutex_lock(&pfkey_mutex);
127 sk_del_node_init_rcu(sk);
128 mutex_unlock(&pfkey_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129}
130
131static struct proto key_proto = {
132 .name = "KEY",
133 .owner = THIS_MODULE,
134 .obj_size = sizeof(struct pfkey_sock),
135};
136
Eric Paris3f378b62009-11-05 22:18:14 -0800137static int pfkey_create(struct net *net, struct socket *sock, int protocol,
138 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139{
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -0800140 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 struct sock *sk;
142 int err;
143
Eric W. Biedermandf008c92012-11-16 03:03:07 +0000144 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 return -EPERM;
146 if (sock->type != SOCK_RAW)
147 return -ESOCKTNOSUPPORT;
148 if (protocol != PF_KEY_V2)
149 return -EPROTONOSUPPORT;
150
151 err = -ENOMEM;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700152 sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 if (sk == NULL)
154 goto out;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 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
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -0800162 atomic_inc(&net_pfkey->socks_nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
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);
stephen hemminger7f6b9db2010-02-22 07:57:19 +0000183
184 synchronize_rcu();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 sock_put(sk);
186
187 return 0;
188}
189
190static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
Al Virodd0fc662005-10-07 07:46:04 +0100191 gfp_t allocation, struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192{
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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 skb_set_owner_r(*skb2, sk);
207 skb_queue_tail(&sk->sk_receive_queue, *skb2);
David S. Miller676d2362014-04-11 16:15:36 -0400208 sk->sk_data_ready(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 *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
Al Virodd0fc662005-10-07 07:46:04 +0100222static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -0800223 int broadcast_flags, struct sock *one_sk,
224 struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225{
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -0800226 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 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
stephen hemminger7f6b9db2010-02-22 07:57:19 +0000237 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800238 sk_for_each_rcu(sk, &net_pfkey->table) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 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 }
stephen hemminger7f6b9db2010-02-22 07:57:19 +0000269 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271 if (one_sk != NULL)
272 err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
273
Wei Yongjun6f961062009-02-25 00:31:04 +0000274 kfree_skb(skb2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 kfree_skb(skb);
276 return err;
277}
278
Timo Teras05238202008-10-01 05:17:54 -0700279static int pfkey_do_dump(struct pfkey_sock *pfk)
280{
Herbert Xu12a169e2008-10-01 07:03:24 -0700281 struct sadb_msg *hdr;
Timo Teras05238202008-10-01 05:17:54 -0700282 int rc;
283
284 rc = pfk->dump.dump(pfk);
285 if (rc == -ENOBUFS)
286 return 0;
287
Herbert Xu12a169e2008-10-01 07:03:24 -0700288 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,
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -0800296 &pfk->sk, sock_net(&pfk->sk));
Herbert Xu12a169e2008-10-01 07:03:24 -0700297 pfk->dump.skb = NULL;
298 }
299
Timo Teras05238202008-10-01 05:17:54 -0700300 pfkey_terminate_dump(pfk);
301 return rc;
302}
303
David S. Miller4c93fbb2011-02-25 18:07:06 -0800304static inline void pfkey_hdr_dup(struct sadb_msg *new,
305 const struct sadb_msg *orig)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306{
307 *new = *orig;
308}
309
David S. Miller4c93fbb2011-02-25 18:07:06 -0800310static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
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;
Kris Katterjohn09a62662006-01-08 22:24:28 -0800328 BUG_ON(err <= 0 || err >= 256);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
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
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -0800336 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 return 0;
339}
340
Mathias Krause8603b9552013-06-26 23:56:59 +0200341static const u8 sadb_ext_min_len[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 [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),
Trent Jaegerdf718372005-12-13 23:12:27 -0800366 [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
Arnaud Ebalard13c1d182008-10-05 13:33:42 -0700367 [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
Nicolas Dichteld2c5f652014-02-20 14:52:41 +0100368 [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369};
370
371/* Verify sadb_address_{len,prefixlen} against sa_family. */
David S. Miller4c93fbb2011-02-25 18:07:06 -0800372static int verify_address_len(const void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
David S. Miller4c93fbb2011-02-25 18:07:06 -0800374 const struct sadb_address *sp = p;
375 const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
376 const struct sockaddr_in *sin;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000377#if IS_ENABLED(CONFIG_IPV6)
David S. Miller4c93fbb2011-02-25 18:07:06 -0800378 const struct sockaddr_in6 *sin6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379#endif
380 int len;
381
382 switch (addr->sa_family) {
383 case AF_INET:
Ilpo Järvinen356f89e2007-08-24 23:00:31 -0700384 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 if (sp->sadb_address_len != len ||
386 sp->sadb_address_prefixlen > 32)
387 return -EINVAL;
388 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000389#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 case AF_INET6:
Ilpo Järvinen356f89e2007-08-24 23:00:31 -0700391 len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (sp->sadb_address_len != len ||
393 sp->sadb_address_prefixlen > 128)
394 return -EINVAL;
395 break;
396#endif
397 default:
398 /* It is user using kernel to keep track of security
399 * associations for another protocol, such as
400 * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
401 * lengths.
402 *
403 * XXX Actually, association/policy database is not yet
404 * XXX able to cope with arbitrary sockaddr families.
405 * XXX When it can, remove this -EINVAL. -DaveM
406 */
407 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410 return 0;
411}
412
David S. Miller4c93fbb2011-02-25 18:07:06 -0800413static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
Trent Jaegerdf718372005-12-13 23:12:27 -0800414{
Ilpo Järvinen356f89e2007-08-24 23:00:31 -0700415 return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
416 sec_ctx->sadb_x_ctx_len,
417 sizeof(uint64_t));
Trent Jaegerdf718372005-12-13 23:12:27 -0800418}
419
David S. Miller4c93fbb2011-02-25 18:07:06 -0800420static inline int verify_sec_ctx_len(const void *p)
Trent Jaegerdf718372005-12-13 23:12:27 -0800421{
David S. Miller4c93fbb2011-02-25 18:07:06 -0800422 const struct sadb_x_sec_ctx *sec_ctx = p;
Stephen Rothwell298bb622007-10-30 23:57:05 -0700423 int len = sec_ctx->sadb_x_ctx_len;
Trent Jaegerdf718372005-12-13 23:12:27 -0800424
Stephen Rothwell298bb622007-10-30 23:57:05 -0700425 if (len > PAGE_SIZE)
Trent Jaegerdf718372005-12-13 23:12:27 -0800426 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
Nikolay Aleksandrov87536a82014-03-07 12:44:18 +0100436static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
437 gfp_t gfp)
Trent Jaegerdf718372005-12-13 23:12:27 -0800438{
439 struct xfrm_user_sec_ctx *uctx = NULL;
440 int ctx_size = sec_ctx->sadb_x_ctx_len;
441
Nikolay Aleksandrov87536a82014-03-07 12:44:18 +0100442 uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
Trent Jaegerdf718372005-12-13 23:12:27 -0800443
444 if (!uctx)
445 return NULL;
446
447 uctx->len = pfkey_sec_ctx_len(sec_ctx);
448 uctx->exttype = sec_ctx->sadb_x_sec_exttype;
449 uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
450 uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
451 uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
452 memcpy(uctx + 1, sec_ctx + 1,
453 uctx->ctx_len);
454
455 return uctx;
456}
457
David S. Miller4c93fbb2011-02-25 18:07:06 -0800458static int present_and_same_family(const struct sadb_address *src,
459 const struct sadb_address *dst)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460{
David S. Miller4c93fbb2011-02-25 18:07:06 -0800461 const struct sockaddr *s_addr, *d_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
463 if (!src || !dst)
464 return 0;
465
David S. Miller4c93fbb2011-02-25 18:07:06 -0800466 s_addr = (const struct sockaddr *)(src + 1);
467 d_addr = (const struct sockaddr *)(dst + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 if (s_addr->sa_family != d_addr->sa_family)
469 return 0;
470 if (s_addr->sa_family != AF_INET
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000471#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 && s_addr->sa_family != AF_INET6
473#endif
474 )
475 return 0;
476
477 return 1;
478}
479
David S. Miller4c93fbb2011-02-25 18:07:06 -0800480static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481{
David S. Miller4c93fbb2011-02-25 18:07:06 -0800482 const char *p = (char *) hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 int len = skb->len;
484
485 len -= sizeof(*hdr);
486 p += sizeof(*hdr);
487 while (len > 0) {
David S. Miller4c93fbb2011-02-25 18:07:06 -0800488 const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 uint16_t ext_type;
490 int ext_len;
491
492 ext_len = ehdr->sadb_ext_len;
493 ext_len *= sizeof(uint64_t);
494 ext_type = ehdr->sadb_ext_type;
495 if (ext_len < sizeof(uint64_t) ||
496 ext_len > len ||
497 ext_type == SADB_EXT_RESERVED)
498 return -EINVAL;
499
500 if (ext_type <= SADB_EXT_MAX) {
501 int min = (int) sadb_ext_min_len[ext_type];
502 if (ext_len < min)
503 return -EINVAL;
504 if (ext_hdrs[ext_type-1] != NULL)
505 return -EINVAL;
506 if (ext_type == SADB_EXT_ADDRESS_SRC ||
507 ext_type == SADB_EXT_ADDRESS_DST ||
508 ext_type == SADB_EXT_ADDRESS_PROXY ||
509 ext_type == SADB_X_EXT_NAT_T_OA) {
510 if (verify_address_len(p))
511 return -EINVAL;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900512 }
Trent Jaegerdf718372005-12-13 23:12:27 -0800513 if (ext_type == SADB_X_EXT_SEC_CTX) {
514 if (verify_sec_ctx_len(p))
515 return -EINVAL;
516 }
David S. Miller4c93fbb2011-02-25 18:07:06 -0800517 ext_hdrs[ext_type-1] = (void *) p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
519 p += ext_len;
520 len -= ext_len;
521 }
522
523 return 0;
524}
525
526static uint16_t
527pfkey_satype2proto(uint8_t satype)
528{
529 switch (satype) {
530 case SADB_SATYPE_UNSPEC:
531 return IPSEC_PROTO_ANY;
532 case SADB_SATYPE_AH:
533 return IPPROTO_AH;
534 case SADB_SATYPE_ESP:
535 return IPPROTO_ESP;
536 case SADB_X_SATYPE_IPCOMP:
537 return IPPROTO_COMP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 default:
555 return 0;
556 }
557 /* NOTREACHED */
558}
559
560/* BTW, this scheme means that there is no way with PFKEY2 sockets to
561 * say specifically 'just raw sockets' as we encode them as 255.
562 */
563
564static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
565{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000566 return proto == IPSEC_PROTO_ANY ? 0 : proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567}
568
569static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
570{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000571 return proto ? proto : IPSEC_PROTO_ANY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572}
573
YOSHIFUJI Hideaki9e8b4ed2008-04-28 00:50:45 +0900574static inline int pfkey_sockaddr_len(sa_family_t family)
575{
576 switch (family) {
577 case AF_INET:
578 return sizeof(struct sockaddr_in);
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000579#if IS_ENABLED(CONFIG_IPV6)
YOSHIFUJI Hideaki9e8b4ed2008-04-28 00:50:45 +0900580 case AF_INET6:
581 return sizeof(struct sockaddr_in6);
582#endif
583 }
584 return 0;
585}
586
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +0900587static
588int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589{
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +0900590 switch (sa->sa_family) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 case AF_INET:
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900592 xaddr->a4 =
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +0900593 ((struct sockaddr_in *)sa)->sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 return AF_INET;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000595#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 case AF_INET6:
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900597 memcpy(xaddr->a6,
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +0900598 &((struct sockaddr_in6 *)sa)->sin6_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 sizeof(struct in6_addr));
600 return AF_INET6;
601#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 }
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +0900603 return 0;
604}
605
606static
David S. Miller4c93fbb2011-02-25 18:07:06 -0800607int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +0900608{
609 return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
610 xaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611}
612
David S. Miller4c93fbb2011-02-25 18:07:06 -0800613static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614{
David S. Miller4c93fbb2011-02-25 18:07:06 -0800615 const struct sadb_sa *sa;
616 const struct sadb_address *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 uint16_t proto;
618 unsigned short family;
619 xfrm_address_t *xaddr;
620
Joe Perchesea110732011-06-13 16:21:26 +0000621 sa = ext_hdrs[SADB_EXT_SA - 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 if (sa == NULL)
623 return NULL;
624
625 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
626 if (proto == 0)
627 return NULL;
628
629 /* sadb_address_len should be checked by caller */
Joe Perchesea110732011-06-13 16:21:26 +0000630 addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 if (addr == NULL)
632 return NULL;
633
David S. Miller4c93fbb2011-02-25 18:07:06 -0800634 family = ((const struct sockaddr *)(addr + 1))->sa_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 switch (family) {
636 case AF_INET:
David S. Miller4c93fbb2011-02-25 18:07:06 -0800637 xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000639#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 case AF_INET6:
David S. Miller4c93fbb2011-02-25 18:07:06 -0800641 xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 break;
643#endif
644 default:
645 xaddr = NULL;
646 }
647
648 if (!xaddr)
649 return NULL;
650
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800651 return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652}
653
654#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
YOSHIFUJI Hideaki9e8b4ed2008-04-28 00:50:45 +0900655
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656static int
657pfkey_sockaddr_size(sa_family_t family)
658{
YOSHIFUJI Hideaki9e8b4ed2008-04-28 00:50:45 +0900659 return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660}
661
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -0700662static inline int pfkey_mode_from_xfrm(int mode)
663{
664 switch(mode) {
665 case XFRM_MODE_TRANSPORT:
666 return IPSEC_MODE_TRANSPORT;
667 case XFRM_MODE_TUNNEL:
668 return IPSEC_MODE_TUNNEL;
669 case XFRM_MODE_BEET:
670 return IPSEC_MODE_BEET;
671 default:
672 return -1;
673 }
674}
675
676static inline int pfkey_mode_to_xfrm(int mode)
677{
678 switch(mode) {
679 case IPSEC_MODE_ANY: /*XXX*/
680 case IPSEC_MODE_TRANSPORT:
681 return XFRM_MODE_TRANSPORT;
682 case IPSEC_MODE_TUNNEL:
683 return XFRM_MODE_TUNNEL;
684 case IPSEC_MODE_BEET:
685 return XFRM_MODE_BEET;
686 default:
687 return -1;
688 }
689}
690
David S. Miller183cad12011-02-24 00:28:01 -0500691static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
David S. Miller4c93fbb2011-02-25 18:07:06 -0800692 struct sockaddr *sa,
693 unsigned short family)
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +0900694{
695 switch (family) {
696 case AF_INET:
697 {
698 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
699 sin->sin_family = AF_INET;
700 sin->sin_port = port;
701 sin->sin_addr.s_addr = xaddr->a4;
702 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
703 return 32;
704 }
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000705#if IS_ENABLED(CONFIG_IPV6)
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +0900706 case AF_INET6:
707 {
708 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
709 sin6->sin6_family = AF_INET6;
710 sin6->sin6_port = port;
711 sin6->sin6_flowinfo = 0;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000712 sin6->sin6_addr = *(struct in6_addr *)xaddr->a6;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +0900713 sin6->sin6_scope_id = 0;
714 return 128;
715 }
716#endif
717 }
718 return 0;
719}
720
David S. Miller4c93fbb2011-02-25 18:07:06 -0800721static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
Herbert Xu050f0092007-10-09 13:31:47 -0700722 int add_keys, int hsc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723{
724 struct sk_buff *skb;
725 struct sadb_msg *hdr;
726 struct sadb_sa *sa;
727 struct sadb_lifetime *lifetime;
728 struct sadb_address *addr;
729 struct sadb_key *key;
730 struct sadb_x_sa2 *sa2;
Trent Jaegerdf718372005-12-13 23:12:27 -0800731 struct sadb_x_sec_ctx *sec_ctx;
732 struct xfrm_sec_ctx *xfrm_ctx;
733 int ctx_size = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 int size;
735 int auth_key_size = 0;
736 int encrypt_key_size = 0;
737 int sockaddr_size;
738 struct xfrm_encap_tmpl *natt = NULL;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -0700739 int mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740
741 /* address family check */
742 sockaddr_size = pfkey_sockaddr_size(x->props.family);
743 if (!sockaddr_size)
744 return ERR_PTR(-EINVAL);
745
746 /* base, SA, (lifetime (HSC),) address(SD), (address(P),)
747 key(AE), (identity(SD),) (sensitivity)> */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900748 size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 sizeof(struct sadb_lifetime) +
750 ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
751 ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900752 sizeof(struct sadb_address)*2 +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 sockaddr_size*2 +
754 sizeof(struct sadb_x_sa2);
Trent Jaegerdf718372005-12-13 23:12:27 -0800755
756 if ((xfrm_ctx = x->security)) {
757 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
758 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
759 }
760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 /* identity & sensitivity */
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +0000762 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 size += sizeof(struct sadb_address) + sockaddr_size;
764
765 if (add_keys) {
766 if (x->aalg && x->aalg->alg_key_len) {
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900767 auth_key_size =
768 PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 size += sizeof(struct sadb_key) + auth_key_size;
770 }
771 if (x->ealg && x->ealg->alg_key_len) {
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900772 encrypt_key_size =
773 PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 size += sizeof(struct sadb_key) + encrypt_key_size;
775 }
776 }
777 if (x->encap)
778 natt = x->encap;
779
780 if (natt && natt->encap_type) {
781 size += sizeof(struct sadb_x_nat_t_type);
782 size += sizeof(struct sadb_x_nat_t_port);
783 size += sizeof(struct sadb_x_nat_t_port);
784 }
785
786 skb = alloc_skb(size + 16, GFP_ATOMIC);
787 if (skb == NULL)
788 return ERR_PTR(-ENOBUFS);
789
790 /* call should fill header later */
791 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
792 memset(hdr, 0, size); /* XXX do we need this ? */
793 hdr->sadb_msg_len = size / sizeof(uint64_t);
794
795 /* sa */
796 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
797 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
798 sa->sadb_sa_exttype = SADB_EXT_SA;
799 sa->sadb_sa_spi = x->id.spi;
800 sa->sadb_sa_replay = x->props.replay_window;
Herbert Xu4f09f0b2005-06-18 22:43:43 -0700801 switch (x->km.state) {
802 case XFRM_STATE_VALID:
803 sa->sadb_sa_state = x->km.dying ?
804 SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
805 break;
806 case XFRM_STATE_ACQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 sa->sadb_sa_state = SADB_SASTATE_LARVAL;
Herbert Xu4f09f0b2005-06-18 22:43:43 -0700808 break;
809 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 sa->sadb_sa_state = SADB_SASTATE_DEAD;
Herbert Xu4f09f0b2005-06-18 22:43:43 -0700811 break;
812 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 sa->sadb_sa_auth = 0;
814 if (x->aalg) {
815 struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +0200816 sa->sadb_sa_auth = (a && a->pfkey_supported) ?
817 a->desc.sadb_alg_id : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 }
819 sa->sadb_sa_encrypt = 0;
820 BUG_ON(x->ealg && x->calg);
821 if (x->ealg) {
822 struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +0200823 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
824 a->desc.sadb_alg_id : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 }
826 /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
827 if (x->calg) {
828 struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +0200829 sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?
830 a->desc.sadb_alg_id : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 }
832
833 sa->sadb_sa_flags = 0;
834 if (x->props.flags & XFRM_STATE_NOECN)
835 sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
836 if (x->props.flags & XFRM_STATE_DECAP_DSCP)
837 sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
Herbert Xudd871472005-06-20 13:21:43 -0700838 if (x->props.flags & XFRM_STATE_NOPMTUDISC)
839 sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
841 /* hard time */
842 if (hsc & 2) {
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900843 lifetime = (struct sadb_lifetime *) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 sizeof(struct sadb_lifetime));
845 lifetime->sadb_lifetime_len =
846 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
847 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
848 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
849 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
850 lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
851 lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
852 }
853 /* soft time */
854 if (hsc & 1) {
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900855 lifetime = (struct sadb_lifetime *) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 sizeof(struct sadb_lifetime));
857 lifetime->sadb_lifetime_len =
858 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
859 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
860 lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
861 lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
862 lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
863 lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
864 }
865 /* current time */
866 lifetime = (struct sadb_lifetime *) skb_put(skb,
867 sizeof(struct sadb_lifetime));
868 lifetime->sadb_lifetime_len =
869 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
870 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
871 lifetime->sadb_lifetime_allocations = x->curlft.packets;
872 lifetime->sadb_lifetime_bytes = x->curlft.bytes;
873 lifetime->sadb_lifetime_addtime = x->curlft.add_time;
874 lifetime->sadb_lifetime_usetime = x->curlft.use_time;
875 /* src address */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900876 addr = (struct sadb_address*) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 sizeof(struct sadb_address)+sockaddr_size);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900878 addr->sadb_address_len =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 (sizeof(struct sadb_address)+sockaddr_size)/
880 sizeof(uint64_t);
881 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900882 /* "if the ports are non-zero, then the sadb_address_proto field,
883 normally zero, MUST be filled in with the transport
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 protocol's number." - RFC2367 */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900885 addr->sadb_address_proto = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 addr->sadb_address_reserved = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +0900888 addr->sadb_address_prefixlen =
889 pfkey_sockaddr_fill(&x->props.saddr, 0,
890 (struct sockaddr *) (addr + 1),
891 x->props.family);
892 if (!addr->sadb_address_prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 BUG();
894
895 /* dst address */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900896 addr = (struct sadb_address*) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 sizeof(struct sadb_address)+sockaddr_size);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900898 addr->sadb_address_len =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 (sizeof(struct sadb_address)+sockaddr_size)/
900 sizeof(uint64_t);
901 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900902 addr->sadb_address_proto = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 addr->sadb_address_reserved = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +0900905 addr->sadb_address_prefixlen =
906 pfkey_sockaddr_fill(&x->id.daddr, 0,
907 (struct sockaddr *) (addr + 1),
908 x->props.family);
909 if (!addr->sadb_address_prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 BUG();
911
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +0000912 if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
913 x->props.family)) {
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +0900914 addr = (struct sadb_address*) skb_put(skb,
915 sizeof(struct sadb_address)+sockaddr_size);
916 addr->sadb_address_len =
917 (sizeof(struct sadb_address)+sockaddr_size)/
918 sizeof(uint64_t);
919 addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
920 addr->sadb_address_proto =
921 pfkey_proto_from_xfrm(x->sel.proto);
922 addr->sadb_address_prefixlen = x->sel.prefixlen_s;
923 addr->sadb_address_reserved = 0;
924
925 pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
926 (struct sockaddr *) (addr + 1),
927 x->props.family);
928 }
929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 /* auth key */
931 if (add_keys && auth_key_size) {
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900932 key = (struct sadb_key *) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 sizeof(struct sadb_key)+auth_key_size);
934 key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
935 sizeof(uint64_t);
936 key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
937 key->sadb_key_bits = x->aalg->alg_key_len;
938 key->sadb_key_reserved = 0;
939 memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
940 }
941 /* encrypt key */
942 if (add_keys && encrypt_key_size) {
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900943 key = (struct sadb_key *) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 sizeof(struct sadb_key)+encrypt_key_size);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900945 key->sadb_key_len = (sizeof(struct sadb_key) +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 encrypt_key_size) / sizeof(uint64_t);
947 key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
948 key->sadb_key_bits = x->ealg->alg_key_len;
949 key->sadb_key_reserved = 0;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +0900950 memcpy(key + 1, x->ealg->alg_key,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 (x->ealg->alg_key_len+7)/8);
952 }
953
954 /* sa */
955 sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
956 sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
957 sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -0700958 if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
959 kfree_skb(skb);
960 return ERR_PTR(-EINVAL);
961 }
962 sa2->sadb_x_sa2_mode = mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 sa2->sadb_x_sa2_reserved1 = 0;
964 sa2->sadb_x_sa2_reserved2 = 0;
965 sa2->sadb_x_sa2_sequence = 0;
966 sa2->sadb_x_sa2_reqid = x->props.reqid;
967
968 if (natt && natt->encap_type) {
969 struct sadb_x_nat_t_type *n_type;
970 struct sadb_x_nat_t_port *n_port;
971
972 /* type */
973 n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
974 n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
975 n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
976 n_type->sadb_x_nat_t_type_type = natt->encap_type;
977 n_type->sadb_x_nat_t_type_reserved[0] = 0;
978 n_type->sadb_x_nat_t_type_reserved[1] = 0;
979 n_type->sadb_x_nat_t_type_reserved[2] = 0;
980
981 /* source port */
982 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
983 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
984 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
985 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
986 n_port->sadb_x_nat_t_port_reserved = 0;
987
988 /* dest port */
989 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
990 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
991 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
992 n_port->sadb_x_nat_t_port_port = natt->encap_dport;
993 n_port->sadb_x_nat_t_port_reserved = 0;
994 }
995
Trent Jaegerdf718372005-12-13 23:12:27 -0800996 /* security context */
997 if (xfrm_ctx) {
998 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
999 sizeof(struct sadb_x_sec_ctx) + ctx_size);
1000 sec_ctx->sadb_x_sec_len =
1001 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
1002 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
1003 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
1004 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
1005 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
1006 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
1007 xfrm_ctx->ctx_len);
1008 }
1009
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 return skb;
1011}
1012
Herbert Xu050f0092007-10-09 13:31:47 -07001013
David S. Miller4c93fbb2011-02-25 18:07:06 -08001014static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
Herbert Xu050f0092007-10-09 13:31:47 -07001015{
1016 struct sk_buff *skb;
1017
Herbert Xu050f0092007-10-09 13:31:47 -07001018 skb = __pfkey_xfrm_state2msg(x, 1, 3);
Herbert Xu050f0092007-10-09 13:31:47 -07001019
1020 return skb;
1021}
1022
David S. Miller4c93fbb2011-02-25 18:07:06 -08001023static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
Herbert Xu050f0092007-10-09 13:31:47 -07001024 int hsc)
1025{
1026 return __pfkey_xfrm_state2msg(x, 0, hsc);
1027}
1028
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001029static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
David S. Miller4c93fbb2011-02-25 18:07:06 -08001030 const struct sadb_msg *hdr,
1031 void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032{
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001033 struct xfrm_state *x;
David S. Miller4c93fbb2011-02-25 18:07:06 -08001034 const struct sadb_lifetime *lifetime;
1035 const struct sadb_sa *sa;
1036 const struct sadb_key *key;
1037 const struct sadb_x_sec_ctx *sec_ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 uint16_t proto;
1039 int err;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001040
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Joe Perchesea110732011-06-13 16:21:26 +00001042 sa = ext_hdrs[SADB_EXT_SA - 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 if (!sa ||
1044 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1045 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1046 return ERR_PTR(-EINVAL);
1047 if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
1048 !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
1049 return ERR_PTR(-EINVAL);
1050 if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
1051 !ext_hdrs[SADB_EXT_KEY_AUTH-1])
1052 return ERR_PTR(-EINVAL);
1053 if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
1054 !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
1055 return ERR_PTR(-EINVAL);
1056
1057 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1058 if (proto == 0)
1059 return ERR_PTR(-EINVAL);
1060
1061 /* default error is no buffer space */
1062 err = -ENOBUFS;
1063
1064 /* RFC2367:
1065
1066 Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
1067 SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
1068 sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
1069 Therefore, the sadb_sa_state field of all submitted SAs MUST be
1070 SADB_SASTATE_MATURE and the kernel MUST return an error if this is
1071 not true.
1072
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001073 However, KAME setkey always uses SADB_SASTATE_LARVAL.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
1075 */
1076 if (sa->sadb_sa_auth > SADB_AALG_MAX ||
1077 (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
1078 sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
1079 sa->sadb_sa_encrypt > SADB_EALG_MAX)
1080 return ERR_PTR(-EINVAL);
Joe Perchesea110732011-06-13 16:21:26 +00001081 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 if (key != NULL &&
1083 sa->sadb_sa_auth != SADB_X_AALG_NULL &&
1084 ((key->sadb_key_bits+7) / 8 == 0 ||
1085 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1086 return ERR_PTR(-EINVAL);
1087 key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1088 if (key != NULL &&
1089 sa->sadb_sa_encrypt != SADB_EALG_NULL &&
1090 ((key->sadb_key_bits+7) / 8 == 0 ||
1091 (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
1092 return ERR_PTR(-EINVAL);
1093
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001094 x = xfrm_state_alloc(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 if (x == NULL)
1096 return ERR_PTR(-ENOBUFS);
1097
1098 x->id.proto = proto;
1099 x->id.spi = sa->sadb_sa_spi;
Fan Du33fce602013-09-17 15:14:13 +08001100 x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay,
1101 (sizeof(x->replay.bitmap) * 8));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
1103 x->props.flags |= XFRM_STATE_NOECN;
1104 if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
1105 x->props.flags |= XFRM_STATE_DECAP_DSCP;
Herbert Xudd871472005-06-20 13:21:43 -07001106 if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
1107 x->props.flags |= XFRM_STATE_NOPMTUDISC;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
Joe Perchesea110732011-06-13 16:21:26 +00001109 lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 if (lifetime != NULL) {
1111 x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1112 x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1113 x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1114 x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1115 }
Joe Perchesea110732011-06-13 16:21:26 +00001116 lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 if (lifetime != NULL) {
1118 x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
1119 x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
1120 x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
1121 x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
1122 }
Trent Jaegerdf718372005-12-13 23:12:27 -08001123
Joe Perchesea110732011-06-13 16:21:26 +00001124 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
Trent Jaegerdf718372005-12-13 23:12:27 -08001125 if (sec_ctx != NULL) {
Nikolay Aleksandrov87536a82014-03-07 12:44:18 +01001126 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
Trent Jaegerdf718372005-12-13 23:12:27 -08001127
1128 if (!uctx)
1129 goto out;
1130
1131 err = security_xfrm_state_alloc(x, uctx);
1132 kfree(uctx);
1133
1134 if (err)
1135 goto out;
1136 }
1137
Joe Perchesea110732011-06-13 16:21:26 +00001138 key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 if (sa->sadb_sa_auth) {
1140 int keysize = 0;
1141 struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001142 if (!a || !a->pfkey_supported) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 err = -ENOSYS;
1144 goto out;
1145 }
1146 if (key)
1147 keysize = (key->sadb_key_bits + 7) / 8;
1148 x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
1149 if (!x->aalg)
1150 goto out;
1151 strcpy(x->aalg->alg_name, a->name);
1152 x->aalg->alg_key_len = 0;
1153 if (key) {
1154 x->aalg->alg_key_len = key->sadb_key_bits;
1155 memcpy(x->aalg->alg_key, key+1, keysize);
1156 }
Martin Willic20a66f2009-12-09 06:11:15 +00001157 x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 x->props.aalgo = sa->sadb_sa_auth;
1159 /* x->algo.flags = sa->sadb_sa_flags; */
1160 }
1161 if (sa->sadb_sa_encrypt) {
1162 if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
1163 struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001164 if (!a || !a->pfkey_supported) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 err = -ENOSYS;
1166 goto out;
1167 }
1168 x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
1169 if (!x->calg)
1170 goto out;
1171 strcpy(x->calg->alg_name, a->name);
1172 x->props.calgo = sa->sadb_sa_encrypt;
1173 } else {
1174 int keysize = 0;
1175 struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001176 if (!a || !a->pfkey_supported) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 err = -ENOSYS;
1178 goto out;
1179 }
1180 key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
1181 if (key)
1182 keysize = (key->sadb_key_bits + 7) / 8;
1183 x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
1184 if (!x->ealg)
1185 goto out;
1186 strcpy(x->ealg->alg_name, a->name);
1187 x->ealg->alg_key_len = 0;
1188 if (key) {
1189 x->ealg->alg_key_len = key->sadb_key_bits;
1190 memcpy(x->ealg->alg_key, key+1, keysize);
1191 }
1192 x->props.ealgo = sa->sadb_sa_encrypt;
1193 }
1194 }
1195 /* x->algo.flags = sa->sadb_sa_flags; */
1196
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001197 x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 &x->props.saddr);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001199 pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 &x->id.daddr);
1201
1202 if (ext_hdrs[SADB_X_EXT_SA2-1]) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08001203 const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07001204 int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1205 if (mode < 0) {
1206 err = -EINVAL;
1207 goto out;
1208 }
1209 x->props.mode = mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 x->props.reqid = sa2->sadb_x_sa2_reqid;
1211 }
1212
1213 if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08001214 const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
1216 /* Nobody uses this, but we try. */
1217 x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
1218 x->sel.prefixlen_s = addr->sadb_address_prefixlen;
1219 }
1220
Kazunori MIYAZAWA4da51052008-05-21 13:26:11 -07001221 if (!x->sel.family)
Joy Latten4a4b6272007-08-02 19:25:43 -07001222 x->sel.family = x->props.family;
1223
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08001225 const struct sadb_x_nat_t_type* n_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 struct xfrm_encap_tmpl *natt;
1227
1228 x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
1229 if (!x->encap)
1230 goto out;
1231
1232 natt = x->encap;
1233 n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
1234 natt->encap_type = n_type->sadb_x_nat_t_type_type;
1235
1236 if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08001237 const struct sadb_x_nat_t_port *n_port =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
1239 natt->encap_sport = n_port->sadb_x_nat_t_port_port;
1240 }
1241 if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08001242 const struct sadb_x_nat_t_port *n_port =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
1244 natt->encap_dport = n_port->sadb_x_nat_t_port_port;
1245 }
Timo Terasa8d694c2009-01-25 20:49:14 -08001246 memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 }
1248
Herbert Xu72cb6962005-06-20 13:18:08 -07001249 err = xfrm_init_state(x);
1250 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 goto out;
Herbert Xu72cb6962005-06-20 13:18:08 -07001252
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 x->km.seq = hdr->sadb_msg_seq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 return x;
1255
1256out:
1257 x->km.state = XFRM_STATE_DEAD;
1258 xfrm_state_put(x);
1259 return ERR_PTR(err);
1260}
1261
David S. Miller4c93fbb2011-02-25 18:07:06 -08001262static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263{
1264 return -EOPNOTSUPP;
1265}
1266
David S. Miller4c93fbb2011-02-25 18:07:06 -08001267static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001269 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 struct sk_buff *resp_skb;
1271 struct sadb_x_sa2 *sa2;
1272 struct sadb_address *saddr, *daddr;
1273 struct sadb_msg *out_hdr;
Herbert Xu658b2192007-10-09 13:29:52 -07001274 struct sadb_spirange *range;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 struct xfrm_state *x = NULL;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07001276 int mode;
Herbert Xu658b2192007-10-09 13:29:52 -07001277 int err;
1278 u32 min_spi, max_spi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 u32 reqid;
1280 u8 proto;
1281 unsigned short family;
1282 xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
1283
1284 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1285 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1286 return -EINVAL;
1287
1288 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1289 if (proto == 0)
1290 return -EINVAL;
1291
1292 if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07001293 mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
1294 if (mode < 0)
1295 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 reqid = sa2->sadb_x_sa2_reqid;
1297 } else {
1298 mode = 0;
1299 reqid = 0;
1300 }
1301
1302 saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
1303 daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
1304
1305 family = ((struct sockaddr *)(saddr + 1))->sa_family;
1306 switch (family) {
1307 case AF_INET:
1308 xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
1309 xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
1310 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001311#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 case AF_INET6:
1313 xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
1314 xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
1315 break;
1316#endif
1317 }
1318
1319 if (hdr->sadb_msg_seq) {
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001320 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +00001321 if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 xfrm_state_put(x);
1323 x = NULL;
1324 }
1325 }
1326
1327 if (!x)
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001328 x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329
1330 if (x == NULL)
1331 return -ENOENT;
1332
Herbert Xu658b2192007-10-09 13:29:52 -07001333 min_spi = 0x100;
1334 max_spi = 0x0fffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
Herbert Xu658b2192007-10-09 13:29:52 -07001336 range = ext_hdrs[SADB_EXT_SPIRANGE-1];
1337 if (range) {
1338 min_spi = range->sadb_spirange_min;
1339 max_spi = range->sadb_spirange_max;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 }
Herbert Xu658b2192007-10-09 13:29:52 -07001341
Fan Du776e9dd2013-12-16 18:47:49 +08001342 err = verify_spi_info(x->id.proto, min_spi, max_spi);
1343 if (err) {
1344 xfrm_state_put(x);
1345 return err;
1346 }
1347
Herbert Xu658b2192007-10-09 13:29:52 -07001348 err = xfrm_alloc_spi(x, min_spi, max_spi);
Herbert Xu050f0092007-10-09 13:31:47 -07001349 resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350
1351 if (IS_ERR(resp_skb)) {
1352 xfrm_state_put(x);
1353 return PTR_ERR(resp_skb);
1354 }
1355
1356 out_hdr = (struct sadb_msg *) resp_skb->data;
1357 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
1358 out_hdr->sadb_msg_type = SADB_GETSPI;
1359 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1360 out_hdr->sadb_msg_errno = 0;
1361 out_hdr->sadb_msg_reserved = 0;
1362 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1363 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
1364
1365 xfrm_state_put(x);
1366
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001367 pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368
1369 return 0;
1370}
1371
David S. Miller4c93fbb2011-02-25 18:07:06 -08001372static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001374 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 struct xfrm_state *x;
1376
1377 if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
1378 return -EOPNOTSUPP;
1379
1380 if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
1381 return 0;
1382
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001383 x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 if (x == NULL)
1385 return 0;
1386
1387 spin_lock_bh(&x->lock);
Steffen Klassert5b8ef342013-08-27 13:43:30 +02001388 if (x->km.state == XFRM_STATE_ACQ)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 x->km.state = XFRM_STATE_ERROR;
Steffen Klassert5b8ef342013-08-27 13:43:30 +02001390
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 spin_unlock_bh(&x->lock);
1392 xfrm_state_put(x);
1393 return 0;
1394}
1395
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001396static inline int event2poltype(int event)
1397{
1398 switch (event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07001399 case XFRM_MSG_DELPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001400 return SADB_X_SPDDELETE;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001401 case XFRM_MSG_NEWPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001402 return SADB_X_SPDADD;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001403 case XFRM_MSG_UPDPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001404 return SADB_X_SPDUPDATE;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001405 case XFRM_MSG_POLEXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001406 // return SADB_X_SPDEXPIRE;
1407 default:
stephen hemminger207024b2010-05-12 06:37:07 +00001408 pr_err("pfkey: Unknown policy event %d\n", event);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001409 break;
1410 }
1411
1412 return 0;
1413}
1414
1415static inline int event2keytype(int event)
1416{
1417 switch (event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07001418 case XFRM_MSG_DELSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001419 return SADB_DELETE;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001420 case XFRM_MSG_NEWSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001421 return SADB_ADD;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001422 case XFRM_MSG_UPDSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001423 return SADB_UPDATE;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001424 case XFRM_MSG_EXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001425 return SADB_EXPIRE;
1426 default:
stephen hemminger207024b2010-05-12 06:37:07 +00001427 pr_err("pfkey: Unknown SA event %d\n", event);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001428 break;
1429 }
1430
1431 return 0;
1432}
1433
1434/* ADD/UPD/DEL */
David S. Miller214e0052011-02-24 00:02:38 -05001435static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001436{
1437 struct sk_buff *skb;
1438 struct sadb_msg *hdr;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001439
Herbert Xu050f0092007-10-09 13:31:47 -07001440 skb = pfkey_xfrm_state2msg(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001441
1442 if (IS_ERR(skb))
1443 return PTR_ERR(skb);
1444
1445 hdr = (struct sadb_msg *) skb->data;
1446 hdr->sadb_msg_version = PF_KEY_V2;
1447 hdr->sadb_msg_type = event2keytype(c->event);
1448 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1449 hdr->sadb_msg_errno = 0;
1450 hdr->sadb_msg_reserved = 0;
1451 hdr->sadb_msg_seq = c->seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001452 hdr->sadb_msg_pid = c->portid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001453
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001454 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001455
1456 return 0;
1457}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
David S. Miller4c93fbb2011-02-25 18:07:06 -08001459static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001461 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 struct xfrm_state *x;
1463 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001464 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001466 x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 if (IS_ERR(x))
1468 return PTR_ERR(x);
1469
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001470 xfrm_state_hold(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 if (hdr->sadb_msg_type == SADB_ADD)
1472 err = xfrm_state_add(x);
1473 else
1474 err = xfrm_state_update(x);
1475
Tetsuo Handa2e710292014-04-22 21:48:30 +09001476 xfrm_audit_state_add(x, err ? 0 : 1, true);
Joy Latten161a09e2006-11-27 13:11:54 -06001477
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 if (err < 0) {
1479 x->km.state = XFRM_STATE_DEAD;
Herbert Xu21380b82006-02-22 14:47:13 -08001480 __xfrm_state_put(x);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -07001481 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 }
1483
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001484 if (hdr->sadb_msg_type == SADB_ADD)
Herbert Xuf60f6b82005-06-18 22:44:37 -07001485 c.event = XFRM_MSG_NEWSA;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001486 else
Herbert Xuf60f6b82005-06-18 22:44:37 -07001487 c.event = XFRM_MSG_UPDSA;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001488 c.seq = hdr->sadb_msg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001489 c.portid = hdr->sadb_msg_pid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001490 km_state_notify(x, &c);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -07001491out:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001492 xfrm_state_put(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001493 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494}
1495
David S. Miller4c93fbb2011-02-25 18:07:06 -08001496static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001498 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 struct xfrm_state *x;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001500 struct km_event c;
1501 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
1503 if (!ext_hdrs[SADB_EXT_SA-1] ||
1504 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1505 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1506 return -EINVAL;
1507
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001508 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 if (x == NULL)
1510 return -ESRCH;
1511
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001512 if ((err = security_xfrm_state_delete(x)))
1513 goto out;
1514
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 if (xfrm_state_kern(x)) {
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001516 err = -EPERM;
1517 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518 }
Joy Latten161a09e2006-11-27 13:11:54 -06001519
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001520 err = xfrm_state_delete(x);
Joy Latten161a09e2006-11-27 13:11:54 -06001521
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001522 if (err < 0)
1523 goto out;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001524
1525 c.seq = hdr->sadb_msg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001526 c.portid = hdr->sadb_msg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001527 c.event = XFRM_MSG_DELSA;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001528 km_state_notify(x, &c);
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001529out:
Tetsuo Handa2e710292014-04-22 21:48:30 +09001530 xfrm_audit_state_delete(x, err ? 0 : 1, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 xfrm_state_put(x);
1532
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001533 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534}
1535
David S. Miller4c93fbb2011-02-25 18:07:06 -08001536static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001538 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 __u8 proto;
1540 struct sk_buff *out_skb;
1541 struct sadb_msg *out_hdr;
1542 struct xfrm_state *x;
1543
1544 if (!ext_hdrs[SADB_EXT_SA-1] ||
1545 !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
1546 ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
1547 return -EINVAL;
1548
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001549 x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 if (x == NULL)
1551 return -ESRCH;
1552
Herbert Xu050f0092007-10-09 13:31:47 -07001553 out_skb = pfkey_xfrm_state2msg(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 proto = x->id.proto;
1555 xfrm_state_put(x);
1556 if (IS_ERR(out_skb))
1557 return PTR_ERR(out_skb);
1558
1559 out_hdr = (struct sadb_msg *) out_skb->data;
1560 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
Charles Hardin435000b2007-11-22 19:35:15 +08001561 out_hdr->sadb_msg_type = SADB_GET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562 out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
1563 out_hdr->sadb_msg_errno = 0;
1564 out_hdr->sadb_msg_reserved = 0;
1565 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
1566 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001567 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569 return 0;
1570}
1571
David S. Miller4c93fbb2011-02-25 18:07:06 -08001572static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
Al Virodd0fc662005-10-07 07:46:04 +01001573 gfp_t allocation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574{
1575 struct sk_buff *skb;
1576 struct sadb_msg *hdr;
1577 int len, auth_len, enc_len, i;
1578
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001579 auth_len = xfrm_count_pfkey_auth_supported();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 if (auth_len) {
1581 auth_len *= sizeof(struct sadb_alg);
1582 auth_len += sizeof(struct sadb_supported);
1583 }
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001584
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001585 enc_len = xfrm_count_pfkey_enc_supported();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 if (enc_len) {
1587 enc_len *= sizeof(struct sadb_alg);
1588 enc_len += sizeof(struct sadb_supported);
1589 }
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001590
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 len = enc_len + auth_len + sizeof(struct sadb_msg);
1592
1593 skb = alloc_skb(len + 16, allocation);
1594 if (!skb)
1595 goto out_put_algs;
1596
1597 hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
1598 pfkey_hdr_dup(hdr, orig);
1599 hdr->sadb_msg_errno = 0;
1600 hdr->sadb_msg_len = len / sizeof(uint64_t);
1601
1602 if (auth_len) {
1603 struct sadb_supported *sp;
1604 struct sadb_alg *ap;
1605
1606 sp = (struct sadb_supported *) skb_put(skb, auth_len);
1607 ap = (struct sadb_alg *) (sp + 1);
1608
1609 sp->sadb_supported_len = auth_len / sizeof(uint64_t);
1610 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
1611
1612 for (i = 0; ; i++) {
1613 struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
1614 if (!aalg)
1615 break;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001616 if (!aalg->pfkey_supported)
1617 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 if (aalg->available)
1619 *ap++ = aalg->desc;
1620 }
1621 }
1622
1623 if (enc_len) {
1624 struct sadb_supported *sp;
1625 struct sadb_alg *ap;
1626
1627 sp = (struct sadb_supported *) skb_put(skb, enc_len);
1628 ap = (struct sadb_alg *) (sp + 1);
1629
1630 sp->sadb_supported_len = enc_len / sizeof(uint64_t);
1631 sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
1632
1633 for (i = 0; ; i++) {
1634 struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
1635 if (!ealg)
1636 break;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001637 if (!ealg->pfkey_supported)
1638 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 if (ealg->available)
1640 *ap++ = ealg->desc;
1641 }
1642 }
1643
1644out_put_algs:
1645 return skb;
1646}
1647
David S. Miller4c93fbb2011-02-25 18:07:06 -08001648static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649{
1650 struct pfkey_sock *pfk = pfkey_sk(sk);
1651 struct sk_buff *supp_skb;
1652
1653 if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
1654 return -EINVAL;
1655
1656 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
1657 if (pfk->registered&(1<<hdr->sadb_msg_satype))
1658 return -EEXIST;
1659 pfk->registered |= (1<<hdr->sadb_msg_satype);
1660 }
1661
1662 xfrm_probe_algs();
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001663
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
1665 if (!supp_skb) {
1666 if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
1667 pfk->registered &= ~(1<<hdr->sadb_msg_satype);
1668
1669 return -ENOBUFS;
1670 }
1671
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001672 pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673
1674 return 0;
1675}
1676
David S. Miller4c93fbb2011-02-25 18:07:06 -08001677static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00001678{
1679 struct sk_buff *skb;
1680 struct sadb_msg *hdr;
1681
1682 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1683 if (!skb)
1684 return -ENOBUFS;
1685
1686 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1687 memcpy(hdr, ihdr, sizeof(struct sadb_msg));
1688 hdr->sadb_msg_errno = (uint8_t) 0;
1689 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
1690
1691 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
1692}
1693
David S. Miller214e0052011-02-24 00:02:38 -05001694static int key_notify_sa_flush(const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001695{
1696 struct sk_buff *skb;
1697 struct sadb_msg *hdr;
1698
1699 skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
1700 if (!skb)
1701 return -ENOBUFS;
1702 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
Herbert Xubf088672005-06-18 22:44:00 -07001703 hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
Jerome Borsboom151bb0f2006-01-24 12:57:19 -08001704 hdr->sadb_msg_type = SADB_FLUSH;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001705 hdr->sadb_msg_seq = c->seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001706 hdr->sadb_msg_pid = c->portid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001707 hdr->sadb_msg_version = PF_KEY_V2;
1708 hdr->sadb_msg_errno = (uint8_t) 0;
1709 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
Mathias Krausea5cc68f2013-06-26 23:52:30 +02001710 hdr->sadb_msg_reserved = 0;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001711
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001712 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001713
1714 return 0;
1715}
1716
David S. Miller4c93fbb2011-02-25 18:07:06 -08001717static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001719 struct net *net = sock_net(sk);
Eric Dumazet95c96172012-04-15 05:58:06 +00001720 unsigned int proto;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001721 struct km_event c;
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00001722 int err, err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723
1724 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1725 if (proto == 0)
1726 return -EINVAL;
1727
Tetsuo Handa2e710292014-04-22 21:48:30 +09001728 err = xfrm_state_flush(net, proto, true);
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00001729 err2 = unicast_flush_resp(sk, hdr);
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001730 if (err || err2) {
1731 if (err == -ESRCH) /* empty table - go quietly */
1732 err = 0;
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00001733 return err ? err : err2;
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001734 }
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00001735
Herbert Xubf088672005-06-18 22:44:00 -07001736 c.data.proto = proto;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001737 c.seq = hdr->sadb_msg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001738 c.portid = hdr->sadb_msg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001739 c.event = XFRM_MSG_FLUSHSA;
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001740 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001741 km_state_notify(NULL, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742
1743 return 0;
1744}
1745
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746static int dump_sa(struct xfrm_state *x, int count, void *ptr)
1747{
Timo Teras83321d62008-03-03 23:40:12 -08001748 struct pfkey_sock *pfk = ptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 struct sk_buff *out_skb;
1750 struct sadb_msg *out_hdr;
1751
Timo Teras83321d62008-03-03 23:40:12 -08001752 if (!pfkey_can_dump(&pfk->sk))
1753 return -ENOBUFS;
1754
Herbert Xu050f0092007-10-09 13:31:47 -07001755 out_skb = pfkey_xfrm_state2msg(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 if (IS_ERR(out_skb))
1757 return PTR_ERR(out_skb);
1758
1759 out_hdr = (struct sadb_msg *) out_skb->data;
Timo Teras83321d62008-03-03 23:40:12 -08001760 out_hdr->sadb_msg_version = pfk->dump.msg_version;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 out_hdr->sadb_msg_type = SADB_DUMP;
1762 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
1763 out_hdr->sadb_msg_errno = 0;
1764 out_hdr->sadb_msg_reserved = 0;
Herbert Xu12a169e2008-10-01 07:03:24 -07001765 out_hdr->sadb_msg_seq = count + 1;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001766 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
Herbert Xu12a169e2008-10-01 07:03:24 -07001767
1768 if (pfk->dump.skb)
1769 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001770 &pfk->sk, sock_net(&pfk->sk));
Herbert Xu12a169e2008-10-01 07:03:24 -07001771 pfk->dump.skb = out_skb;
1772
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 return 0;
1774}
1775
Timo Teras83321d62008-03-03 23:40:12 -08001776static int pfkey_dump_sa(struct pfkey_sock *pfk)
1777{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001778 struct net *net = sock_net(&pfk->sk);
1779 return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
Timo Teras83321d62008-03-03 23:40:12 -08001780}
1781
1782static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
1783{
Fan Du283bc9f2013-11-07 17:47:50 +08001784 struct net *net = sock_net(&pfk->sk);
1785
1786 xfrm_state_walk_done(&pfk->dump.u.state, net);
Timo Teras83321d62008-03-03 23:40:12 -08001787}
1788
David S. Miller4c93fbb2011-02-25 18:07:06 -08001789static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790{
1791 u8 proto;
Nicolas Dichtel870a2df2014-03-06 18:24:29 +01001792 struct xfrm_address_filter *filter = NULL;
Timo Teras83321d62008-03-03 23:40:12 -08001793 struct pfkey_sock *pfk = pfkey_sk(sk);
1794
1795 if (pfk->dump.dump != NULL)
1796 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797
1798 proto = pfkey_satype2proto(hdr->sadb_msg_satype);
1799 if (proto == 0)
1800 return -EINVAL;
1801
Nicolas Dichteld3623092014-02-14 15:30:36 +01001802 if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
1803 struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
1804
1805 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
1806 if (filter == NULL)
1807 return -ENOMEM;
1808
1809 memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
1810 sizeof(xfrm_address_t));
1811 memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
1812 sizeof(xfrm_address_t));
1813 filter->family = xfilter->sadb_x_filter_family;
1814 filter->splen = xfilter->sadb_x_filter_splen;
1815 filter->dplen = xfilter->sadb_x_filter_dplen;
1816 }
1817
Timo Teras83321d62008-03-03 23:40:12 -08001818 pfk->dump.msg_version = hdr->sadb_msg_version;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001819 pfk->dump.msg_portid = hdr->sadb_msg_pid;
Timo Teras83321d62008-03-03 23:40:12 -08001820 pfk->dump.dump = pfkey_dump_sa;
1821 pfk->dump.done = pfkey_dump_sa_done;
Nicolas Dichteld3623092014-02-14 15:30:36 +01001822 xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
Timo Teras4c563f72008-02-28 21:31:08 -08001823
Timo Teras83321d62008-03-03 23:40:12 -08001824 return pfkey_do_dump(pfk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825}
1826
David S. Miller4c93fbb2011-02-25 18:07:06 -08001827static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828{
1829 struct pfkey_sock *pfk = pfkey_sk(sk);
1830 int satype = hdr->sadb_msg_satype;
David S. Miller4c93fbb2011-02-25 18:07:06 -08001831 bool reset_errno = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832
1833 if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08001834 reset_errno = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 if (satype != 0 && satype != 1)
1836 return -EINVAL;
1837 pfk->promisc = satype;
1838 }
David S. Miller4c93fbb2011-02-25 18:07:06 -08001839 if (reset_errno && skb_cloned(skb))
1840 skb = skb_copy(skb, GFP_KERNEL);
1841 else
1842 skb = skb_clone(skb, GFP_KERNEL);
1843
1844 if (reset_errno && skb) {
1845 struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
1846 new_hdr->sadb_msg_errno = 0;
1847 }
1848
1849 pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 return 0;
1851}
1852
1853static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
1854{
1855 int i;
1856 u32 reqid = *(u32*)ptr;
1857
1858 for (i=0; i<xp->xfrm_nr; i++) {
1859 if (xp->xfrm_vec[i].reqid == reqid)
1860 return -EEXIST;
1861 }
1862 return 0;
1863}
1864
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001865static u32 gen_reqid(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866{
Timo Teras4c563f72008-02-28 21:31:08 -08001867 struct xfrm_policy_walk walk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 u32 start;
Timo Teras4c563f72008-02-28 21:31:08 -08001869 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 static u32 reqid = IPSEC_MANUAL_REQID_MAX;
1871
1872 start = reqid;
1873 do {
1874 ++reqid;
1875 if (reqid == 0)
1876 reqid = IPSEC_MANUAL_REQID_MAX+1;
Timo Teras4c563f72008-02-28 21:31:08 -08001877 xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001878 rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
Fan Du283bc9f2013-11-07 17:47:50 +08001879 xfrm_policy_walk_done(&walk, net);
Timo Teras4c563f72008-02-28 21:31:08 -08001880 if (rc != -EEXIST)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 return reqid;
1882 } while (reqid != start);
1883 return 0;
1884}
1885
1886static int
1887parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
1888{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001889 struct net *net = xp_net(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890 struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07001891 int mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892
1893 if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
1894 return -ELOOP;
1895
1896 if (rq->sadb_x_ipsecrequest_mode == 0)
1897 return -EINVAL;
1898
1899 t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07001900 if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
1901 return -EINVAL;
1902 t->mode = mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
1904 t->optional = 1;
1905 else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
1906 t->reqid = rq->sadb_x_ipsecrequest_reqid;
1907 if (t->reqid > IPSEC_MANUAL_REQID_MAX)
1908 t->reqid = 0;
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08001909 if (!t->reqid && !(t->reqid = gen_reqid(net)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 return -ENOBUFS;
1911 }
1912
1913 /* addresses present only in tunnel mode */
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -07001914 if (t->mode == XFRM_MODE_TUNNEL) {
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +09001915 u8 *sa = (u8 *) (rq + 1);
1916 int family, socklen;
1917
1918 family = pfkey_sockaddr_extract((struct sockaddr *)sa,
1919 &t->saddr);
1920 if (!family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 return -EINVAL;
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +09001922
1923 socklen = pfkey_sockaddr_len(family);
1924 if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
1925 &t->id.daddr) != family)
1926 return -EINVAL;
1927 t->encap_family = family;
Miika Komu2718aa72006-11-30 16:41:50 -08001928 } else
1929 t->encap_family = xp->family;
1930
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 /* No way to set this via kame pfkey */
Herbert Xuc5d18e92008-04-22 00:46:42 -07001932 t->allalgs = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 xp->xfrm_nr++;
1934 return 0;
1935}
1936
1937static int
1938parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
1939{
1940 int err;
1941 int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
1942 struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
1943
Dan Carpenterf674e722012-09-27 22:21:19 +00001944 if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
1945 return -EINVAL;
1946
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 while (len >= sizeof(struct sadb_x_ipsecrequest)) {
1948 if ((err = parse_ipsecrequest(xp, rq)) < 0)
1949 return err;
1950 len -= rq->sadb_x_ipsecrequest_len;
1951 rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
1952 }
1953 return 0;
1954}
1955
David S. Miller4c93fbb2011-02-25 18:07:06 -08001956static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
Trent Jaegerdf718372005-12-13 23:12:27 -08001957{
1958 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
1959
1960 if (xfrm_ctx) {
1961 int len = sizeof(struct sadb_x_sec_ctx);
1962 len += xfrm_ctx->ctx_len;
1963 return PFKEY_ALIGN8(len);
1964 }
1965 return 0;
1966}
1967
David S. Miller4c93fbb2011-02-25 18:07:06 -08001968static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969{
David S. Miller4c93fbb2011-02-25 18:07:06 -08001970 const struct xfrm_tmpl *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971 int sockaddr_size = pfkey_sockaddr_size(xp->family);
Miika Komu2718aa72006-11-30 16:41:50 -08001972 int socklen = 0;
1973 int i;
1974
1975 for (i=0; i<xp->xfrm_nr; i++) {
1976 t = xp->xfrm_vec + i;
YOSHIFUJI Hideaki9e8b4ed2008-04-28 00:50:45 +09001977 socklen += pfkey_sockaddr_len(t->encap_family);
Miika Komu2718aa72006-11-30 16:41:50 -08001978 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979
1980 return sizeof(struct sadb_msg) +
1981 (sizeof(struct sadb_lifetime) * 3) +
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09001982 (sizeof(struct sadb_address) * 2) +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 (sockaddr_size * 2) +
1984 sizeof(struct sadb_x_policy) +
Miika Komu2718aa72006-11-30 16:41:50 -08001985 (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
1986 (socklen * 2) +
Trent Jaegerdf718372005-12-13 23:12:27 -08001987 pfkey_xfrm_policy2sec_ctx_size(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988}
1989
David S. Miller4c93fbb2011-02-25 18:07:06 -08001990static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991{
1992 struct sk_buff *skb;
1993 int size;
1994
1995 size = pfkey_xfrm_policy2msg_size(xp);
1996
1997 skb = alloc_skb(size + 16, GFP_ATOMIC);
1998 if (skb == NULL)
1999 return ERR_PTR(-ENOBUFS);
2000
2001 return skb;
2002}
2003
David S. Miller4c93fbb2011-02-25 18:07:06 -08002004static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005{
2006 struct sadb_msg *hdr;
2007 struct sadb_address *addr;
2008 struct sadb_lifetime *lifetime;
2009 struct sadb_x_policy *pol;
Trent Jaegerdf718372005-12-13 23:12:27 -08002010 struct sadb_x_sec_ctx *sec_ctx;
2011 struct xfrm_sec_ctx *xfrm_ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 int i;
2013 int size;
2014 int sockaddr_size = pfkey_sockaddr_size(xp->family);
YOSHIFUJI Hideaki9e8b4ed2008-04-28 00:50:45 +09002015 int socklen = pfkey_sockaddr_len(xp->family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016
2017 size = pfkey_xfrm_policy2msg_size(xp);
2018
2019 /* call should fill header later */
2020 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
2021 memset(hdr, 0, size); /* XXX do we need this ? */
2022
2023 /* src address */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002024 addr = (struct sadb_address*) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 sizeof(struct sadb_address)+sockaddr_size);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002026 addr->sadb_address_len =
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 (sizeof(struct sadb_address)+sockaddr_size)/
2028 sizeof(uint64_t);
2029 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
2030 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
2031 addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
2032 addr->sadb_address_reserved = 0;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09002033 if (!pfkey_sockaddr_fill(&xp->selector.saddr,
2034 xp->selector.sport,
2035 (struct sockaddr *) (addr + 1),
2036 xp->family))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037 BUG();
2038
2039 /* dst address */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002040 addr = (struct sadb_address*) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 sizeof(struct sadb_address)+sockaddr_size);
2042 addr->sadb_address_len =
2043 (sizeof(struct sadb_address)+sockaddr_size)/
2044 sizeof(uint64_t);
2045 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
2046 addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002047 addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 addr->sadb_address_reserved = 0;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09002049
2050 pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
2051 (struct sockaddr *) (addr + 1),
2052 xp->family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053
2054 /* hard time */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002055 lifetime = (struct sadb_lifetime *) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 sizeof(struct sadb_lifetime));
2057 lifetime->sadb_lifetime_len =
2058 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2059 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2060 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
2061 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
2062 lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
2063 lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
2064 /* soft time */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002065 lifetime = (struct sadb_lifetime *) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066 sizeof(struct sadb_lifetime));
2067 lifetime->sadb_lifetime_len =
2068 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2069 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
2070 lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
2071 lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
2072 lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
2073 lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
2074 /* current time */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002075 lifetime = (struct sadb_lifetime *) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076 sizeof(struct sadb_lifetime));
2077 lifetime->sadb_lifetime_len =
2078 sizeof(struct sadb_lifetime)/sizeof(uint64_t);
2079 lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2080 lifetime->sadb_lifetime_allocations = xp->curlft.packets;
2081 lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
2082 lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
2083 lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
2084
2085 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
2086 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
2087 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2088 pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
2089 if (xp->action == XFRM_POLICY_ALLOW) {
2090 if (xp->xfrm_nr)
2091 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
2092 else
2093 pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
2094 }
2095 pol->sadb_x_policy_dir = dir+1;
Dan Carpenterff862a42013-07-28 23:04:45 +03002096 pol->sadb_x_policy_reserved = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 pol->sadb_x_policy_id = xp->index;
2098 pol->sadb_x_policy_priority = xp->priority;
2099
2100 for (i=0; i<xp->xfrm_nr; i++) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08002101 const struct xfrm_tmpl *t = xp->xfrm_vec + i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 struct sadb_x_ipsecrequest *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103 int req_size;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002104 int mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105
2106 req_size = sizeof(struct sadb_x_ipsecrequest);
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09002107 if (t->mode == XFRM_MODE_TUNNEL) {
2108 socklen = pfkey_sockaddr_len(t->encap_family);
2109 req_size += socklen * 2;
2110 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 size -= 2*socklen;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09002112 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 rq = (void*)skb_put(skb, req_size);
2114 pol->sadb_x_policy_len += req_size/8;
2115 memset(rq, 0, sizeof(*rq));
2116 rq->sadb_x_ipsecrequest_len = req_size;
2117 rq->sadb_x_ipsecrequest_proto = t->id.proto;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002118 if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
2119 return -EINVAL;
David S. Millerfefaa752007-04-17 21:48:10 -07002120 rq->sadb_x_ipsecrequest_mode = mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
2122 if (t->reqid)
2123 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
2124 if (t->optional)
2125 rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
2126 rq->sadb_x_ipsecrequest_reqid = t->reqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09002128 if (t->mode == XFRM_MODE_TUNNEL) {
2129 u8 *sa = (void *)(rq + 1);
2130 pfkey_sockaddr_fill(&t->saddr, 0,
2131 (struct sockaddr *)sa,
2132 t->encap_family);
2133 pfkey_sockaddr_fill(&t->id.daddr, 0,
2134 (struct sockaddr *) (sa + socklen),
2135 t->encap_family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 }
2137 }
Trent Jaegerdf718372005-12-13 23:12:27 -08002138
2139 /* security context */
2140 if ((xfrm_ctx = xp->security)) {
2141 int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
2142
2143 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
2144 sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
2145 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
2146 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
2147 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
2148 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
2149 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
2150 xfrm_ctx->ctx_len);
2151 }
2152
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 hdr->sadb_msg_len = size / sizeof(uint64_t);
2154 hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002155
2156 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157}
2158
David S. Miller214e0052011-02-24 00:02:38 -05002159static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002160{
2161 struct sk_buff *out_skb;
2162 struct sadb_msg *out_hdr;
2163 int err;
2164
2165 out_skb = pfkey_xfrm_policy2msg_prep(xp);
Dan Carpenter9a127aa2010-03-24 01:47:00 +00002166 if (IS_ERR(out_skb))
2167 return PTR_ERR(out_skb);
2168
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002169 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2170 if (err < 0)
2171 return err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002172
2173 out_hdr = (struct sadb_msg *) out_skb->data;
2174 out_hdr->sadb_msg_version = PF_KEY_V2;
2175
Herbert Xuf60f6b82005-06-18 22:44:37 -07002176 if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002177 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
2178 else
2179 out_hdr->sadb_msg_type = event2poltype(c->event);
2180 out_hdr->sadb_msg_errno = 0;
2181 out_hdr->sadb_msg_seq = c->seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002182 out_hdr->sadb_msg_pid = c->portid;
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002183 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002184 return 0;
2185
2186}
2187
David S. Miller4c93fbb2011-02-25 18:07:06 -08002188static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002190 struct net *net = sock_net(sk);
Trent Jaegerdf718372005-12-13 23:12:27 -08002191 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 struct sadb_lifetime *lifetime;
2193 struct sadb_address *sa;
2194 struct sadb_x_policy *pol;
2195 struct xfrm_policy *xp;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002196 struct km_event c;
Trent Jaegerdf718372005-12-13 23:12:27 -08002197 struct sadb_x_sec_ctx *sec_ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198
2199 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2200 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2201 !ext_hdrs[SADB_X_EXT_POLICY-1])
2202 return -EINVAL;
2203
2204 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2205 if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
2206 return -EINVAL;
2207 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2208 return -EINVAL;
2209
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002210 xp = xfrm_policy_alloc(net, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 if (xp == NULL)
2212 return -ENOBUFS;
2213
2214 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
2215 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
2216 xp->priority = pol->sadb_x_policy_priority;
2217
Junwei Zhangd0d79c32013-03-06 20:48:47 +00002218 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219 xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 xp->selector.family = xp->family;
2221 xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
2222 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2223 xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2224 if (xp->selector.sport)
Al Viro8f83f232006-09-27 18:46:11 -07002225 xp->selector.sport_mask = htons(0xffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002226
Junwei Zhangd0d79c32013-03-06 20:48:47 +00002227 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228 pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
2229 xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
2230
2231 /* Amusing, we set this twice. KAME apps appear to set same value
2232 * in both addresses.
2233 */
2234 xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2235
2236 xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2237 if (xp->selector.dport)
Al Viro8f83f232006-09-27 18:46:11 -07002238 xp->selector.dport_mask = htons(0xffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239
Joe Perchesea110732011-06-13 16:21:26 +00002240 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
Trent Jaegerdf718372005-12-13 23:12:27 -08002241 if (sec_ctx != NULL) {
Nikolay Aleksandrov87536a82014-03-07 12:44:18 +01002242 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
Trent Jaegerdf718372005-12-13 23:12:27 -08002243
2244 if (!uctx) {
2245 err = -ENOBUFS;
2246 goto out;
2247 }
2248
Nikolay Aleksandrov52a4c642014-03-07 12:44:19 +01002249 err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
Trent Jaegerdf718372005-12-13 23:12:27 -08002250 kfree(uctx);
2251
2252 if (err)
2253 goto out;
2254 }
2255
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256 xp->lft.soft_byte_limit = XFRM_INF;
2257 xp->lft.hard_byte_limit = XFRM_INF;
2258 xp->lft.soft_packet_limit = XFRM_INF;
2259 xp->lft.hard_packet_limit = XFRM_INF;
2260 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
2261 xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2262 xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2263 xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2264 xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2265 }
2266 if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
2267 xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
2268 xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
2269 xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
2270 xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
2271 }
2272 xp->xfrm_nr = 0;
2273 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2274 (err = parse_ipsecrequests(xp, pol)) < 0)
2275 goto out;
2276
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277 err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
2278 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
Trent Jaegerdf718372005-12-13 23:12:27 -08002279
Tetsuo Handa2e710292014-04-22 21:48:30 +09002280 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
Joy Latten161a09e2006-11-27 13:11:54 -06002281
Trent Jaegerdf718372005-12-13 23:12:27 -08002282 if (err)
2283 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002285 if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
Herbert Xuf60f6b82005-06-18 22:44:37 -07002286 c.event = XFRM_MSG_UPDPOLICY;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002287 else
Herbert Xuf60f6b82005-06-18 22:44:37 -07002288 c.event = XFRM_MSG_NEWPOLICY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002290 c.seq = hdr->sadb_msg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002291 c.portid = hdr->sadb_msg_pid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002292
2293 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294 xfrm_pol_put(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 return 0;
2296
2297out:
Herbert Xu12a169e2008-10-01 07:03:24 -07002298 xp->walk.dead = 1;
WANG Cong64c31b32008-01-07 22:34:29 -08002299 xfrm_policy_destroy(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 return err;
2301}
2302
David S. Miller4c93fbb2011-02-25 18:07:06 -08002303static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002305 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306 int err;
2307 struct sadb_address *sa;
2308 struct sadb_x_policy *pol;
Paul Moore03e1ad72008-04-12 19:07:52 -07002309 struct xfrm_policy *xp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310 struct xfrm_selector sel;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002311 struct km_event c;
Trent Jaegerdf718372005-12-13 23:12:27 -08002312 struct sadb_x_sec_ctx *sec_ctx;
Brian Haley2db3e472008-04-24 20:38:31 -07002313 struct xfrm_sec_ctx *pol_ctx = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314
2315 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
2316 ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
2317 !ext_hdrs[SADB_X_EXT_POLICY-1])
2318 return -EINVAL;
2319
2320 pol = ext_hdrs[SADB_X_EXT_POLICY-1];
2321 if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
2322 return -EINVAL;
2323
2324 memset(&sel, 0, sizeof(sel));
2325
Junwei Zhangd0d79c32013-03-06 20:48:47 +00002326 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2328 sel.prefixlen_s = sa->sadb_address_prefixlen;
2329 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2330 sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
2331 if (sel.sport)
Al Viro8f83f232006-09-27 18:46:11 -07002332 sel.sport_mask = htons(0xffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333
Junwei Zhangd0d79c32013-03-06 20:48:47 +00002334 sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2336 sel.prefixlen_d = sa->sadb_address_prefixlen;
2337 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2338 sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
2339 if (sel.dport)
Al Viro8f83f232006-09-27 18:46:11 -07002340 sel.dport_mask = htons(0xffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002341
Joe Perchesea110732011-06-13 16:21:26 +00002342 sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
Trent Jaegerdf718372005-12-13 23:12:27 -08002343 if (sec_ctx != NULL) {
Nikolay Aleksandrov87536a82014-03-07 12:44:18 +01002344 struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL);
Trent Jaegerdf718372005-12-13 23:12:27 -08002345
2346 if (!uctx)
2347 return -ENOMEM;
2348
Nikolay Aleksandrov52a4c642014-03-07 12:44:19 +01002349 err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
Trent Jaegerdf718372005-12-13 23:12:27 -08002350 kfree(uctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08002351 if (err)
2352 return err;
Brian Haley2db3e472008-04-24 20:38:31 -07002353 }
Trent Jaegerdf718372005-12-13 23:12:27 -08002354
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00002355 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
Paul Moore03e1ad72008-04-12 19:07:52 -07002356 pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
2357 1, &err);
2358 security_xfrm_policy_free(pol_ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 if (xp == NULL)
2360 return -ENOENT;
2361
Tetsuo Handa2e710292014-04-22 21:48:30 +09002362 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
David S. Miller13fcfbb02007-02-12 13:53:54 -08002363
2364 if (err)
Catherine Zhangc8c05a82006-06-08 23:39:49 -07002365 goto out;
David S. Miller13fcfbb02007-02-12 13:53:54 -08002366
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002367 c.seq = hdr->sadb_msg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002368 c.portid = hdr->sadb_msg_pid;
Tobias Brunner1839faa2008-10-10 14:07:03 -07002369 c.data.byid = 0;
Herbert Xuf60f6b82005-06-18 22:44:37 -07002370 c.event = XFRM_MSG_DELPOLICY;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002371 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
2372
Catherine Zhangc8c05a82006-06-08 23:39:49 -07002373out:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002374 xfrm_pol_put(xp);
Paul Mooree4c17212013-05-29 07:36:25 +00002375 if (err == 0)
2376 xfrm_garbage_collect(net);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002377 return err;
2378}
2379
David S. Miller4c93fbb2011-02-25 18:07:06 -08002380static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002381{
2382 int err;
2383 struct sk_buff *out_skb;
2384 struct sadb_msg *out_hdr;
2385 err = 0;
2386
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2388 if (IS_ERR(out_skb)) {
2389 err = PTR_ERR(out_skb);
2390 goto out;
2391 }
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002392 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2393 if (err < 0)
2394 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395
2396 out_hdr = (struct sadb_msg *) out_skb->data;
2397 out_hdr->sadb_msg_version = hdr->sadb_msg_version;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002398 out_hdr->sadb_msg_type = hdr->sadb_msg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399 out_hdr->sadb_msg_satype = 0;
2400 out_hdr->sadb_msg_errno = 0;
2401 out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
2402 out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002403 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404 err = 0;
2405
2406out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407 return err;
2408}
2409
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002410#ifdef CONFIG_NET_KEY_MIGRATE
2411static int pfkey_sockaddr_pair_size(sa_family_t family)
2412{
YOSHIFUJI Hideaki9e8b4ed2008-04-28 00:50:45 +09002413 return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002414}
2415
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002416static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002417 xfrm_address_t *saddr, xfrm_address_t *daddr,
2418 u16 *family)
2419{
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +09002420 int af, socklen;
2421
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002422 if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002423 return -EINVAL;
2424
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002425 af = pfkey_sockaddr_extract(sa, saddr);
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +09002426 if (!af)
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002427 return -EINVAL;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002428
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +09002429 socklen = pfkey_sockaddr_len(af);
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002430 if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
YOSHIFUJI Hideaki5f95ac92008-04-28 02:46:24 +09002431 daddr) != af)
2432 return -EINVAL;
2433
2434 *family = af;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002435 return 0;
2436}
2437
2438static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
2439 struct xfrm_migrate *m)
2440{
2441 int err;
2442 struct sadb_x_ipsecrequest *rq2;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002443 int mode;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002444
2445 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2446 len < rq1->sadb_x_ipsecrequest_len)
2447 return -EINVAL;
2448
2449 /* old endoints */
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002450 err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
2451 rq1->sadb_x_ipsecrequest_len,
2452 &m->old_saddr, &m->old_daddr,
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002453 &m->old_family);
2454 if (err)
2455 return err;
2456
2457 rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
2458 len -= rq1->sadb_x_ipsecrequest_len;
2459
2460 if (len <= sizeof(struct sadb_x_ipsecrequest) ||
2461 len < rq2->sadb_x_ipsecrequest_len)
2462 return -EINVAL;
2463
2464 /* new endpoints */
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002465 err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
2466 rq2->sadb_x_ipsecrequest_len,
2467 &m->new_saddr, &m->new_daddr,
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002468 &m->new_family);
2469 if (err)
2470 return err;
2471
2472 if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
2473 rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
2474 rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
2475 return -EINVAL;
2476
2477 m->proto = rq1->sadb_x_ipsecrequest_proto;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002478 if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
2479 return -EINVAL;
2480 m->mode = mode;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002481 m->reqid = rq1->sadb_x_ipsecrequest_reqid;
2482
2483 return ((int)(rq1->sadb_x_ipsecrequest_len +
2484 rq2->sadb_x_ipsecrequest_len));
2485}
2486
2487static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
David S. Miller4c93fbb2011-02-25 18:07:06 -08002488 const struct sadb_msg *hdr, void * const *ext_hdrs)
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002489{
2490 int i, len, ret, err = -EINVAL;
2491 u8 dir;
2492 struct sadb_address *sa;
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002493 struct sadb_x_kmaddress *kma;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002494 struct sadb_x_policy *pol;
2495 struct sadb_x_ipsecrequest *rq;
2496 struct xfrm_selector sel;
2497 struct xfrm_migrate m[XFRM_MAX_DEPTH];
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002498 struct xfrm_kmaddress k;
Fan Du8d549c42013-11-07 17:47:49 +08002499 struct net *net = sock_net(sk);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002500
2501 if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002502 ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002503 !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
2504 err = -EINVAL;
2505 goto out;
2506 }
2507
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002508 kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002509 pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002510
2511 if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
2512 err = -EINVAL;
2513 goto out;
2514 }
2515
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002516 if (kma) {
2517 /* convert sadb_x_kmaddress to xfrm_kmaddress */
2518 k.reserved = kma->sadb_x_kmaddress_reserved;
2519 ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
2520 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
2521 &k.local, &k.remote, &k.family);
2522 if (ret < 0) {
2523 err = ret;
2524 goto out;
2525 }
2526 }
2527
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002528 dir = pol->sadb_x_policy_dir - 1;
2529 memset(&sel, 0, sizeof(sel));
2530
2531 /* set source address info of selector */
2532 sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
2533 sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
2534 sel.prefixlen_s = sa->sadb_address_prefixlen;
2535 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2536 sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2537 if (sel.sport)
Al Viro582ee432007-07-26 17:33:39 +01002538 sel.sport_mask = htons(0xffff);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002539
2540 /* set destination address info of selector */
Himangi Saraogi47162c02014-05-30 21:18:12 +05302541 sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002542 pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
2543 sel.prefixlen_d = sa->sadb_address_prefixlen;
2544 sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
2545 sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
2546 if (sel.dport)
Al Viro582ee432007-07-26 17:33:39 +01002547 sel.dport_mask = htons(0xffff);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002548
2549 rq = (struct sadb_x_ipsecrequest *)(pol + 1);
2550
2551 /* extract ipsecrequests */
2552 i = 0;
2553 len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
2554
2555 while (len > 0 && i < XFRM_MAX_DEPTH) {
2556 ret = ipsecrequests_to_migrate(rq, len, &m[i]);
2557 if (ret < 0) {
2558 err = ret;
2559 goto out;
2560 } else {
2561 rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
2562 len -= ret;
2563 i++;
2564 }
2565 }
2566
2567 if (!i || len > 0) {
2568 err = -EINVAL;
2569 goto out;
2570 }
2571
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002572 return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
Fan Du8d549c42013-11-07 17:47:49 +08002573 kma ? &k : NULL, net);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002574
2575 out:
2576 return err;
2577}
2578#else
2579static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
Stephen Hemminger7f6daa62011-03-01 22:51:52 -08002580 const struct sadb_msg *hdr, void * const *ext_hdrs)
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002581{
2582 return -ENOPROTOOPT;
2583}
2584#endif
2585
2586
David S. Miller4c93fbb2011-02-25 18:07:06 -08002587static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002588{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002589 struct net *net = sock_net(sk);
Herbert Xu77d8d7a2005-10-05 12:15:12 -07002590 unsigned int dir;
Eric Paris215a2dd2007-03-07 16:01:45 -08002591 int err = 0, delete;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 struct sadb_x_policy *pol;
2593 struct xfrm_policy *xp;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002594 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595
2596 if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
2597 return -EINVAL;
2598
Herbert Xu77d8d7a2005-10-05 12:15:12 -07002599 dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
2600 if (dir >= XFRM_POLICY_MAX)
2601 return -EINVAL;
2602
Eric Paris215a2dd2007-03-07 16:01:45 -08002603 delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00002604 xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08002605 dir, pol->sadb_x_policy_id, delete, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002606 if (xp == NULL)
2607 return -ENOENT;
2608
Eric Paris215a2dd2007-03-07 16:01:45 -08002609 if (delete) {
Tetsuo Handa2e710292014-04-22 21:48:30 +09002610 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002611
Eric Paris215a2dd2007-03-07 16:01:45 -08002612 if (err)
2613 goto out;
2614 c.seq = hdr->sadb_msg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002615 c.portid = hdr->sadb_msg_pid;
Herbert Xubf088672005-06-18 22:44:00 -07002616 c.data.byid = 1;
Herbert Xuf60f6b82005-06-18 22:44:37 -07002617 c.event = XFRM_MSG_DELPOLICY;
Herbert Xu77d8d7a2005-10-05 12:15:12 -07002618 km_policy_notify(xp, dir, &c);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002619 } else {
Herbert Xu77d8d7a2005-10-05 12:15:12 -07002620 err = key_pol_get_resp(sk, xp, hdr, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622
Eric Paris215a2dd2007-03-07 16:01:45 -08002623out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624 xfrm_pol_put(xp);
Paul Mooree4c17212013-05-29 07:36:25 +00002625 if (delete && err == 0)
2626 xfrm_garbage_collect(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002627 return err;
2628}
2629
2630static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
2631{
Timo Teras83321d62008-03-03 23:40:12 -08002632 struct pfkey_sock *pfk = ptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633 struct sk_buff *out_skb;
2634 struct sadb_msg *out_hdr;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002635 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002636
Timo Teras83321d62008-03-03 23:40:12 -08002637 if (!pfkey_can_dump(&pfk->sk))
2638 return -ENOBUFS;
2639
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640 out_skb = pfkey_xfrm_policy2msg_prep(xp);
2641 if (IS_ERR(out_skb))
2642 return PTR_ERR(out_skb);
2643
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07002644 err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
2645 if (err < 0)
2646 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002647
2648 out_hdr = (struct sadb_msg *) out_skb->data;
Timo Teras83321d62008-03-03 23:40:12 -08002649 out_hdr->sadb_msg_version = pfk->dump.msg_version;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002650 out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
2651 out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
2652 out_hdr->sadb_msg_errno = 0;
Herbert Xu12a169e2008-10-01 07:03:24 -07002653 out_hdr->sadb_msg_seq = count + 1;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002654 out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
Herbert Xu12a169e2008-10-01 07:03:24 -07002655
2656 if (pfk->dump.skb)
2657 pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002658 &pfk->sk, sock_net(&pfk->sk));
Herbert Xu12a169e2008-10-01 07:03:24 -07002659 pfk->dump.skb = out_skb;
2660
Linus Torvalds1da177e2005-04-16 15:20:36 -07002661 return 0;
2662}
2663
Timo Teras83321d62008-03-03 23:40:12 -08002664static int pfkey_dump_sp(struct pfkey_sock *pfk)
2665{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002666 struct net *net = sock_net(&pfk->sk);
2667 return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
Timo Teras83321d62008-03-03 23:40:12 -08002668}
2669
2670static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
2671{
Fan Du283bc9f2013-11-07 17:47:50 +08002672 struct net *net = sock_net((struct sock *)pfk);
2673
2674 xfrm_policy_walk_done(&pfk->dump.u.policy, net);
Timo Teras83321d62008-03-03 23:40:12 -08002675}
2676
David S. Miller4c93fbb2011-02-25 18:07:06 -08002677static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678{
Timo Teras83321d62008-03-03 23:40:12 -08002679 struct pfkey_sock *pfk = pfkey_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002680
Timo Teras83321d62008-03-03 23:40:12 -08002681 if (pfk->dump.dump != NULL)
2682 return -EBUSY;
Timo Teras4c563f72008-02-28 21:31:08 -08002683
Timo Teras83321d62008-03-03 23:40:12 -08002684 pfk->dump.msg_version = hdr->sadb_msg_version;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002685 pfk->dump.msg_portid = hdr->sadb_msg_pid;
Timo Teras83321d62008-03-03 23:40:12 -08002686 pfk->dump.dump = pfkey_dump_sp;
2687 pfk->dump.done = pfkey_dump_sp_done;
2688 xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
2689
2690 return pfkey_do_dump(pfk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691}
2692
David S. Miller214e0052011-02-24 00:02:38 -05002693static int key_notify_policy_flush(const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694{
2695 struct sk_buff *skb_out;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002696 struct sadb_msg *hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002697
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002698 skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002699 if (!skb_out)
2700 return -ENOBUFS;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002701 hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
Jerome Borsboom151bb0f2006-01-24 12:57:19 -08002702 hdr->sadb_msg_type = SADB_X_SPDFLUSH;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002703 hdr->sadb_msg_seq = c->seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002704 hdr->sadb_msg_pid = c->portid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002705 hdr->sadb_msg_version = PF_KEY_V2;
2706 hdr->sadb_msg_errno = (uint8_t) 0;
Nicolas Dichtel85dfb742013-02-18 16:24:20 +01002707 hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002708 hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
Mathias Krausea5cc68f2013-06-26 23:52:30 +02002709 hdr->sadb_msg_reserved = 0;
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002710 pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002711 return 0;
2712
2713}
2714
David S. Miller4c93fbb2011-02-25 18:07:06 -08002715static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002716{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002717 struct net *net = sock_net(sk);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002718 struct km_event c;
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00002719 int err, err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720
Tetsuo Handa2e710292014-04-22 21:48:30 +09002721 err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00002722 err2 = unicast_flush_resp(sk, hdr);
Jamal Hadi Salim2f1eb652010-02-19 02:00:42 +00002723 if (err || err2) {
2724 if (err == -ESRCH) /* empty table - old silent behavior */
2725 return 0;
2726 return err;
2727 }
Jamal Hadi Salim8be987d2010-02-19 02:00:40 +00002728
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002729 c.data.type = XFRM_POLICY_TYPE_MAIN;
Herbert Xuf60f6b82005-06-18 22:44:37 -07002730 c.event = XFRM_MSG_FLUSHPOLICY;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002731 c.portid = hdr->sadb_msg_pid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002732 c.seq = hdr->sadb_msg_seq;
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002733 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002734 km_policy_notify(NULL, 0, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002735
2736 return 0;
2737}
2738
2739typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
David S. Miller4c93fbb2011-02-25 18:07:06 -08002740 const struct sadb_msg *hdr, void * const *ext_hdrs);
Mathias Krause8603b9552013-06-26 23:56:59 +02002741static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002742 [SADB_RESERVED] = pfkey_reserved,
2743 [SADB_GETSPI] = pfkey_getspi,
2744 [SADB_UPDATE] = pfkey_add,
2745 [SADB_ADD] = pfkey_add,
2746 [SADB_DELETE] = pfkey_delete,
2747 [SADB_GET] = pfkey_get,
2748 [SADB_ACQUIRE] = pfkey_acquire,
2749 [SADB_REGISTER] = pfkey_register,
2750 [SADB_EXPIRE] = NULL,
2751 [SADB_FLUSH] = pfkey_flush,
2752 [SADB_DUMP] = pfkey_dump,
2753 [SADB_X_PROMISC] = pfkey_promisc,
2754 [SADB_X_PCHANGE] = NULL,
2755 [SADB_X_SPDUPDATE] = pfkey_spdadd,
2756 [SADB_X_SPDADD] = pfkey_spdadd,
2757 [SADB_X_SPDDELETE] = pfkey_spddelete,
2758 [SADB_X_SPDGET] = pfkey_spdget,
2759 [SADB_X_SPDACQUIRE] = NULL,
2760 [SADB_X_SPDDUMP] = pfkey_spddump,
2761 [SADB_X_SPDFLUSH] = pfkey_spdflush,
2762 [SADB_X_SPDSETIDX] = pfkey_spdadd,
2763 [SADB_X_SPDDELETE2] = pfkey_spdget,
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08002764 [SADB_X_MIGRATE] = pfkey_migrate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002765};
2766
David S. Miller4c93fbb2011-02-25 18:07:06 -08002767static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002768{
2769 void *ext_hdrs[SADB_EXT_MAX];
2770 int err;
2771
2772 pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002773 BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774
2775 memset(ext_hdrs, 0, sizeof(ext_hdrs));
2776 err = parse_exthdrs(skb, hdr, ext_hdrs);
2777 if (!err) {
2778 err = -EOPNOTSUPP;
2779 if (pfkey_funcs[hdr->sadb_msg_type])
2780 err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
2781 }
2782 return err;
2783}
2784
2785static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
2786{
2787 struct sadb_msg *hdr = NULL;
2788
2789 if (skb->len < sizeof(*hdr)) {
2790 *errp = -EMSGSIZE;
2791 } else {
2792 hdr = (struct sadb_msg *) skb->data;
2793 if (hdr->sadb_msg_version != PF_KEY_V2 ||
2794 hdr->sadb_msg_reserved != 0 ||
2795 (hdr->sadb_msg_type <= SADB_RESERVED ||
2796 hdr->sadb_msg_type > SADB_MAX)) {
2797 hdr = NULL;
2798 *errp = -EINVAL;
2799 } else if (hdr->sadb_msg_len != (skb->len /
2800 sizeof(uint64_t)) ||
2801 hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
2802 sizeof(uint64_t))) {
2803 hdr = NULL;
2804 *errp = -EMSGSIZE;
2805 } else {
2806 *errp = 0;
2807 }
2808 }
2809 return hdr;
2810}
2811
David S. Miller4c93fbb2011-02-25 18:07:06 -08002812static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
2813 const struct xfrm_algo_desc *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002814{
Herbert Xuf3980352007-12-19 23:44:29 -08002815 unsigned int id = d->desc.sadb_alg_id;
2816
2817 if (id >= sizeof(t->aalgos) * 8)
2818 return 0;
2819
2820 return (t->aalgos >> id) & 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821}
2822
David S. Miller4c93fbb2011-02-25 18:07:06 -08002823static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
2824 const struct xfrm_algo_desc *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002825{
Herbert Xuf3980352007-12-19 23:44:29 -08002826 unsigned int id = d->desc.sadb_alg_id;
2827
2828 if (id >= sizeof(t->ealgos) * 8)
2829 return 0;
2830
2831 return (t->ealgos >> id) & 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832}
2833
David S. Miller4c93fbb2011-02-25 18:07:06 -08002834static int count_ah_combs(const struct xfrm_tmpl *t)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002835{
2836 int i, sz = 0;
2837
2838 for (i = 0; ; i++) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08002839 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002840 if (!aalg)
2841 break;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02002842 if (!aalg->pfkey_supported)
2843 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844 if (aalg_tmpl_set(t, aalg) && aalg->available)
2845 sz += sizeof(struct sadb_comb);
2846 }
2847 return sz + sizeof(struct sadb_prop);
2848}
2849
David S. Miller4c93fbb2011-02-25 18:07:06 -08002850static int count_esp_combs(const struct xfrm_tmpl *t)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002851{
2852 int i, k, sz = 0;
2853
2854 for (i = 0; ; i++) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08002855 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002856 if (!ealg)
2857 break;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002858
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02002859 if (!ealg->pfkey_supported)
2860 continue;
2861
Linus Torvalds1da177e2005-04-16 15:20:36 -07002862 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2863 continue;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002864
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865 for (k = 1; ; k++) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08002866 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002867 if (!aalg)
2868 break;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002869
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02002870 if (!aalg->pfkey_supported)
2871 continue;
2872
Linus Torvalds1da177e2005-04-16 15:20:36 -07002873 if (aalg_tmpl_set(t, aalg) && aalg->available)
2874 sz += sizeof(struct sadb_comb);
2875 }
2876 }
2877 return sz + sizeof(struct sadb_prop);
2878}
2879
David S. Miller4c93fbb2011-02-25 18:07:06 -08002880static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002881{
2882 struct sadb_prop *p;
2883 int i;
2884
2885 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2886 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2887 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2888 p->sadb_prop_replay = 32;
2889 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2890
2891 for (i = 0; ; i++) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08002892 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893 if (!aalg)
2894 break;
2895
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02002896 if (!aalg->pfkey_supported)
2897 continue;
2898
Linus Torvalds1da177e2005-04-16 15:20:36 -07002899 if (aalg_tmpl_set(t, aalg) && aalg->available) {
2900 struct sadb_comb *c;
2901 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2902 memset(c, 0, sizeof(*c));
2903 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2904 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2905 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2906 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2907 c->sadb_comb_hard_addtime = 24*60*60;
2908 c->sadb_comb_soft_addtime = 20*60*60;
2909 c->sadb_comb_hard_usetime = 8*60*60;
2910 c->sadb_comb_soft_usetime = 7*60*60;
2911 }
2912 }
2913}
2914
David S. Miller4c93fbb2011-02-25 18:07:06 -08002915static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916{
2917 struct sadb_prop *p;
2918 int i, k;
2919
2920 p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
2921 p->sadb_prop_len = sizeof(struct sadb_prop)/8;
2922 p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
2923 p->sadb_prop_replay = 32;
2924 memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
2925
2926 for (i=0; ; i++) {
David S. Miller4c93fbb2011-02-25 18:07:06 -08002927 const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 if (!ealg)
2929 break;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002930
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02002931 if (!ealg->pfkey_supported)
2932 continue;
2933
Linus Torvalds1da177e2005-04-16 15:20:36 -07002934 if (!(ealg_tmpl_set(t, ealg) && ealg->available))
2935 continue;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09002936
Linus Torvalds1da177e2005-04-16 15:20:36 -07002937 for (k = 1; ; k++) {
2938 struct sadb_comb *c;
David S. Miller4c93fbb2011-02-25 18:07:06 -08002939 const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002940 if (!aalg)
2941 break;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02002942 if (!aalg->pfkey_supported)
2943 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944 if (!(aalg_tmpl_set(t, aalg) && aalg->available))
2945 continue;
2946 c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
2947 memset(c, 0, sizeof(*c));
2948 p->sadb_prop_len += sizeof(struct sadb_comb)/8;
2949 c->sadb_comb_auth = aalg->desc.sadb_alg_id;
2950 c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
2951 c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
2952 c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
2953 c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
2954 c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
2955 c->sadb_comb_hard_addtime = 24*60*60;
2956 c->sadb_comb_soft_addtime = 20*60*60;
2957 c->sadb_comb_hard_usetime = 8*60*60;
2958 c->sadb_comb_soft_usetime = 7*60*60;
2959 }
2960 }
2961}
2962
David S. Miller214e0052011-02-24 00:02:38 -05002963static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002964{
2965 return 0;
2966}
2967
David S. Miller214e0052011-02-24 00:02:38 -05002968static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002969{
2970 struct sk_buff *out_skb;
2971 struct sadb_msg *out_hdr;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002972 int hard;
2973 int hsc;
2974
Herbert Xubf088672005-06-18 22:44:00 -07002975 hard = c->data.hard;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002976 if (hard)
2977 hsc = 2;
2978 else
2979 hsc = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002980
Herbert Xu050f0092007-10-09 13:31:47 -07002981 out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002982 if (IS_ERR(out_skb))
2983 return PTR_ERR(out_skb);
2984
2985 out_hdr = (struct sadb_msg *) out_skb->data;
2986 out_hdr->sadb_msg_version = PF_KEY_V2;
2987 out_hdr->sadb_msg_type = SADB_EXPIRE;
2988 out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
2989 out_hdr->sadb_msg_errno = 0;
2990 out_hdr->sadb_msg_reserved = 0;
2991 out_hdr->sadb_msg_seq = 0;
2992 out_hdr->sadb_msg_pid = 0;
2993
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08002994 pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995 return 0;
2996}
2997
David S. Miller214e0052011-02-24 00:02:38 -05002998static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002999{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08003000 struct net *net = x ? xs_net(x) : c->net;
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003001 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3002
3003 if (atomic_read(&net_pfkey->socks_nr) == 0)
Jamal Hadi Salim99c6f602008-06-10 14:25:34 -07003004 return 0;
3005
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003006 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07003007 case XFRM_MSG_EXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003008 return key_notify_sa_expire(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07003009 case XFRM_MSG_DELSA:
3010 case XFRM_MSG_NEWSA:
3011 case XFRM_MSG_UPDSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003012 return key_notify_sa(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07003013 case XFRM_MSG_FLUSHSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003014 return key_notify_sa_flush(c);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08003015 case XFRM_MSG_NEWAE: /* not yet supported */
3016 break;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003017 default:
stephen hemminger207024b2010-05-12 06:37:07 +00003018 pr_err("pfkey: Unknown SA event %d\n", c->event);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003019 break;
3020 }
3021
3022 return 0;
3023}
3024
David S. Miller214e0052011-02-24 00:02:38 -05003025static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003026{
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07003027 if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
3028 return 0;
3029
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003030 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07003031 case XFRM_MSG_POLEXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003032 return key_notify_policy_expire(xp, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07003033 case XFRM_MSG_DELPOLICY:
3034 case XFRM_MSG_NEWPOLICY:
3035 case XFRM_MSG_UPDPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003036 return key_notify_policy(xp, dir, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07003037 case XFRM_MSG_FLUSHPOLICY:
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07003038 if (c->data.type != XFRM_POLICY_TYPE_MAIN)
3039 break;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003040 return key_notify_policy_flush(c);
3041 default:
stephen hemminger207024b2010-05-12 06:37:07 +00003042 pr_err("pfkey: Unknown policy event %d\n", c->event);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003043 break;
3044 }
3045
3046 return 0;
3047}
3048
Linus Torvalds1da177e2005-04-16 15:20:36 -07003049static u32 get_acqseq(void)
3050{
3051 u32 res;
Eric Dumazet28aecb92010-01-29 04:05:52 +00003052 static atomic_t acqseq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003053
Eric Dumazet28aecb92010-01-29 04:05:52 +00003054 do {
3055 res = atomic_inc_return(&acqseq);
3056 } while (!res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003057 return res;
3058}
3059
Horia Geanta0f245582014-02-12 16:20:06 +02003060static bool pfkey_is_alive(const struct km_event *c)
3061{
3062 struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
3063 struct sock *sk;
3064 bool is_alive = false;
3065
3066 rcu_read_lock();
3067 sk_for_each_rcu(sk, &net_pfkey->table) {
3068 if (pfkey_sk(sk)->registered) {
3069 is_alive = true;
3070 break;
3071 }
3072 }
3073 rcu_read_unlock();
3074
3075 return is_alive;
3076}
3077
Fan Du65e07362012-08-15 10:13:47 +08003078static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003079{
3080 struct sk_buff *skb;
3081 struct sadb_msg *hdr;
3082 struct sadb_address *addr;
3083 struct sadb_x_policy *pol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084 int sockaddr_size;
3085 int size;
Venkat Yekkirala4e2ba182006-07-24 23:31:14 -07003086 struct sadb_x_sec_ctx *sec_ctx;
3087 struct xfrm_sec_ctx *xfrm_ctx;
3088 int ctx_size = 0;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003089
Linus Torvalds1da177e2005-04-16 15:20:36 -07003090 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3091 if (!sockaddr_size)
3092 return -EINVAL;
3093
3094 size = sizeof(struct sadb_msg) +
3095 (sizeof(struct sadb_address) * 2) +
3096 (sockaddr_size * 2) +
3097 sizeof(struct sadb_x_policy);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003098
Linus Torvalds1da177e2005-04-16 15:20:36 -07003099 if (x->id.proto == IPPROTO_AH)
3100 size += count_ah_combs(t);
3101 else if (x->id.proto == IPPROTO_ESP)
3102 size += count_esp_combs(t);
3103
Venkat Yekkirala4e2ba182006-07-24 23:31:14 -07003104 if ((xfrm_ctx = x->security)) {
3105 ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
3106 size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
3107 }
3108
Linus Torvalds1da177e2005-04-16 15:20:36 -07003109 skb = alloc_skb(size + 16, GFP_ATOMIC);
3110 if (skb == NULL)
3111 return -ENOMEM;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003112
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3114 hdr->sadb_msg_version = PF_KEY_V2;
3115 hdr->sadb_msg_type = SADB_ACQUIRE;
3116 hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
3117 hdr->sadb_msg_len = size / sizeof(uint64_t);
3118 hdr->sadb_msg_errno = 0;
3119 hdr->sadb_msg_reserved = 0;
3120 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3121 hdr->sadb_msg_pid = 0;
3122
3123 /* src address */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003124 addr = (struct sadb_address*) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003125 sizeof(struct sadb_address)+sockaddr_size);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003126 addr->sadb_address_len =
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127 (sizeof(struct sadb_address)+sockaddr_size)/
3128 sizeof(uint64_t);
3129 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3130 addr->sadb_address_proto = 0;
3131 addr->sadb_address_reserved = 0;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003132 addr->sadb_address_prefixlen =
3133 pfkey_sockaddr_fill(&x->props.saddr, 0,
3134 (struct sockaddr *) (addr + 1),
3135 x->props.family);
3136 if (!addr->sadb_address_prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003137 BUG();
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003138
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139 /* dst address */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003140 addr = (struct sadb_address*) skb_put(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003141 sizeof(struct sadb_address)+sockaddr_size);
3142 addr->sadb_address_len =
3143 (sizeof(struct sadb_address)+sockaddr_size)/
3144 sizeof(uint64_t);
3145 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3146 addr->sadb_address_proto = 0;
3147 addr->sadb_address_reserved = 0;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003148 addr->sadb_address_prefixlen =
3149 pfkey_sockaddr_fill(&x->id.daddr, 0,
3150 (struct sockaddr *) (addr + 1),
3151 x->props.family);
3152 if (!addr->sadb_address_prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153 BUG();
3154
3155 pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
3156 pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
3157 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3158 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
Fan Du65e07362012-08-15 10:13:47 +08003159 pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
Dan Carpenterff862a42013-07-28 23:04:45 +03003160 pol->sadb_x_policy_reserved = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003161 pol->sadb_x_policy_id = xp->index;
Dan Carpenterff862a42013-07-28 23:04:45 +03003162 pol->sadb_x_policy_priority = xp->priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003163
3164 /* Set sadb_comb's. */
3165 if (x->id.proto == IPPROTO_AH)
3166 dump_ah_combs(skb, t);
3167 else if (x->id.proto == IPPROTO_ESP)
3168 dump_esp_combs(skb, t);
3169
Venkat Yekkirala4e2ba182006-07-24 23:31:14 -07003170 /* security context */
3171 if (xfrm_ctx) {
3172 sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
3173 sizeof(struct sadb_x_sec_ctx) + ctx_size);
3174 sec_ctx->sadb_x_sec_len =
3175 (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
3176 sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
3177 sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
3178 sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
3179 sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
3180 memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
3181 xfrm_ctx->ctx_len);
3182 }
3183
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08003184 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185}
3186
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07003187static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003188 u8 *data, int len, int *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003189{
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08003190 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003191 struct xfrm_policy *xp;
3192 struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
Trent Jaegerdf718372005-12-13 23:12:27 -08003193 struct sadb_x_sec_ctx *sec_ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003194
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07003195 switch (sk->sk_family) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003196 case AF_INET:
3197 if (opt != IP_IPSEC_POLICY) {
3198 *dir = -EOPNOTSUPP;
3199 return NULL;
3200 }
3201 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00003202#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003203 case AF_INET6:
3204 if (opt != IPV6_IPSEC_POLICY) {
3205 *dir = -EOPNOTSUPP;
3206 return NULL;
3207 }
3208 break;
3209#endif
3210 default:
3211 *dir = -EINVAL;
3212 return NULL;
3213 }
3214
3215 *dir = -EINVAL;
3216
3217 if (len < sizeof(struct sadb_x_policy) ||
3218 pol->sadb_x_policy_len*8 > len ||
3219 pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
3220 (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
3221 return NULL;
3222
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08003223 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003224 if (xp == NULL) {
3225 *dir = -ENOBUFS;
3226 return NULL;
3227 }
3228
3229 xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
3230 XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
3231
3232 xp->lft.soft_byte_limit = XFRM_INF;
3233 xp->lft.hard_byte_limit = XFRM_INF;
3234 xp->lft.soft_packet_limit = XFRM_INF;
3235 xp->lft.hard_packet_limit = XFRM_INF;
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07003236 xp->family = sk->sk_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003237
3238 xp->xfrm_nr = 0;
3239 if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
3240 (*dir = parse_ipsecrequests(xp, pol)) < 0)
3241 goto out;
3242
Trent Jaegerdf718372005-12-13 23:12:27 -08003243 /* security context too */
3244 if (len >= (pol->sadb_x_policy_len*8 +
3245 sizeof(struct sadb_x_sec_ctx))) {
3246 char *p = (char *)pol;
3247 struct xfrm_user_sec_ctx *uctx;
3248
3249 p += pol->sadb_x_policy_len*8;
3250 sec_ctx = (struct sadb_x_sec_ctx *)p;
3251 if (len < pol->sadb_x_policy_len*8 +
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07003252 sec_ctx->sadb_x_sec_len) {
3253 *dir = -EINVAL;
Trent Jaegerdf718372005-12-13 23:12:27 -08003254 goto out;
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07003255 }
Trent Jaegerdf718372005-12-13 23:12:27 -08003256 if ((*dir = verify_sec_ctx_len(p)))
3257 goto out;
Nikolay Aleksandrov87536a82014-03-07 12:44:18 +01003258 uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
Nikolay Aleksandrov52a4c642014-03-07 12:44:19 +01003259 *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
Trent Jaegerdf718372005-12-13 23:12:27 -08003260 kfree(uctx);
3261
3262 if (*dir)
3263 goto out;
3264 }
3265
Linus Torvalds1da177e2005-04-16 15:20:36 -07003266 *dir = pol->sadb_x_policy_dir-1;
3267 return xp;
3268
3269out:
Alexey Dobriyan70e90672008-11-06 23:08:37 -08003270 xp->walk.dead = 1;
WANG Cong64c31b32008-01-07 22:34:29 -08003271 xfrm_policy_destroy(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003272 return NULL;
3273}
3274
Al Viro5d36b182006-11-08 00:24:06 -08003275static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003276{
3277 struct sk_buff *skb;
3278 struct sadb_msg *hdr;
3279 struct sadb_sa *sa;
3280 struct sadb_address *addr;
3281 struct sadb_x_nat_t_port *n_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003282 int sockaddr_size;
3283 int size;
3284 __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
3285 struct xfrm_encap_tmpl *natt = NULL;
3286
3287 sockaddr_size = pfkey_sockaddr_size(x->props.family);
3288 if (!sockaddr_size)
3289 return -EINVAL;
3290
3291 if (!satype)
3292 return -EINVAL;
3293
3294 if (!x->encap)
3295 return -EINVAL;
3296
3297 natt = x->encap;
3298
3299 /* Build an SADB_X_NAT_T_NEW_MAPPING message:
3300 *
3301 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
3302 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
3303 */
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003304
Linus Torvalds1da177e2005-04-16 15:20:36 -07003305 size = sizeof(struct sadb_msg) +
3306 sizeof(struct sadb_sa) +
3307 (sizeof(struct sadb_address) * 2) +
3308 (sockaddr_size * 2) +
3309 (sizeof(struct sadb_x_nat_t_port) * 2);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003310
Linus Torvalds1da177e2005-04-16 15:20:36 -07003311 skb = alloc_skb(size + 16, GFP_ATOMIC);
3312 if (skb == NULL)
3313 return -ENOMEM;
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003314
Linus Torvalds1da177e2005-04-16 15:20:36 -07003315 hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
3316 hdr->sadb_msg_version = PF_KEY_V2;
3317 hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
3318 hdr->sadb_msg_satype = satype;
3319 hdr->sadb_msg_len = size / sizeof(uint64_t);
3320 hdr->sadb_msg_errno = 0;
3321 hdr->sadb_msg_reserved = 0;
3322 hdr->sadb_msg_seq = x->km.seq = get_acqseq();
3323 hdr->sadb_msg_pid = 0;
3324
3325 /* SA */
3326 sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
3327 sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
3328 sa->sadb_sa_exttype = SADB_EXT_SA;
3329 sa->sadb_sa_spi = x->id.spi;
3330 sa->sadb_sa_replay = 0;
3331 sa->sadb_sa_state = 0;
3332 sa->sadb_sa_auth = 0;
3333 sa->sadb_sa_encrypt = 0;
3334 sa->sadb_sa_flags = 0;
3335
3336 /* ADDRESS_SRC (old addr) */
3337 addr = (struct sadb_address*)
3338 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003339 addr->sadb_address_len =
Linus Torvalds1da177e2005-04-16 15:20:36 -07003340 (sizeof(struct sadb_address)+sockaddr_size)/
3341 sizeof(uint64_t);
3342 addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
3343 addr->sadb_address_proto = 0;
3344 addr->sadb_address_reserved = 0;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003345 addr->sadb_address_prefixlen =
3346 pfkey_sockaddr_fill(&x->props.saddr, 0,
3347 (struct sockaddr *) (addr + 1),
3348 x->props.family);
3349 if (!addr->sadb_address_prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003350 BUG();
3351
3352 /* NAT_T_SPORT (old port) */
3353 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3354 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3355 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
3356 n_port->sadb_x_nat_t_port_port = natt->encap_sport;
3357 n_port->sadb_x_nat_t_port_reserved = 0;
3358
3359 /* ADDRESS_DST (new addr) */
3360 addr = (struct sadb_address*)
3361 skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
YOSHIFUJI Hideaki8ff24542007-02-09 23:24:58 +09003362 addr->sadb_address_len =
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363 (sizeof(struct sadb_address)+sockaddr_size)/
3364 sizeof(uint64_t);
3365 addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
3366 addr->sadb_address_proto = 0;
3367 addr->sadb_address_reserved = 0;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003368 addr->sadb_address_prefixlen =
3369 pfkey_sockaddr_fill(ipaddr, 0,
3370 (struct sockaddr *) (addr + 1),
3371 x->props.family);
3372 if (!addr->sadb_address_prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373 BUG();
3374
3375 /* NAT_T_DPORT (new port) */
3376 n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
3377 n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
3378 n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
3379 n_port->sadb_x_nat_t_port_port = sport;
3380 n_port->sadb_x_nat_t_port_reserved = 0;
3381
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08003382 return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003383}
3384
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003385#ifdef CONFIG_NET_KEY_MIGRATE
3386static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
David S. Miller183cad12011-02-24 00:28:01 -05003387 const struct xfrm_selector *sel)
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003388{
3389 struct sadb_address *addr;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003390 addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
3391 addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
3392 addr->sadb_address_exttype = type;
3393 addr->sadb_address_proto = sel->proto;
3394 addr->sadb_address_reserved = 0;
3395
3396 switch (type) {
3397 case SADB_EXT_ADDRESS_SRC:
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003398 addr->sadb_address_prefixlen = sel->prefixlen_s;
3399 pfkey_sockaddr_fill(&sel->saddr, 0,
3400 (struct sockaddr *)(addr + 1),
3401 sel->family);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003402 break;
3403 case SADB_EXT_ADDRESS_DST:
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003404 addr->sadb_address_prefixlen = sel->prefixlen_d;
3405 pfkey_sockaddr_fill(&sel->daddr, 0,
3406 (struct sockaddr *)(addr + 1),
3407 sel->family);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003408 break;
3409 default:
3410 return -EINVAL;
3411 }
3412
3413 return 0;
3414}
3415
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07003416
David S. Miller183cad12011-02-24 00:28:01 -05003417static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07003418{
3419 struct sadb_x_kmaddress *kma;
3420 u8 *sa;
3421 int family = k->family;
3422 int socklen = pfkey_sockaddr_len(family);
3423 int size_req;
3424
3425 size_req = (sizeof(struct sadb_x_kmaddress) +
3426 pfkey_sockaddr_pair_size(family));
3427
3428 kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
3429 memset(kma, 0, size_req);
3430 kma->sadb_x_kmaddress_len = size_req / 8;
3431 kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
3432 kma->sadb_x_kmaddress_reserved = k->reserved;
3433
3434 sa = (u8 *)(kma + 1);
3435 if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
3436 !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
3437 return -EINVAL;
3438
3439 return 0;
3440}
3441
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003442static int set_ipsecrequest(struct sk_buff *skb,
3443 uint8_t proto, uint8_t mode, int level,
3444 uint32_t reqid, uint8_t family,
David S. Miller183cad12011-02-24 00:28:01 -05003445 const xfrm_address_t *src, const xfrm_address_t *dst)
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003446{
3447 struct sadb_x_ipsecrequest *rq;
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003448 u8 *sa;
3449 int socklen = pfkey_sockaddr_len(family);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003450 int size_req;
3451
3452 size_req = sizeof(struct sadb_x_ipsecrequest) +
3453 pfkey_sockaddr_pair_size(family);
3454
3455 rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
3456 memset(rq, 0, size_req);
3457 rq->sadb_x_ipsecrequest_len = size_req;
3458 rq->sadb_x_ipsecrequest_proto = proto;
3459 rq->sadb_x_ipsecrequest_mode = mode;
3460 rq->sadb_x_ipsecrequest_level = level;
3461 rq->sadb_x_ipsecrequest_reqid = reqid;
3462
YOSHIFUJI Hideakie5b56652008-04-28 01:46:41 +09003463 sa = (u8 *) (rq + 1);
3464 if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
3465 !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003466 return -EINVAL;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003467
3468 return 0;
3469}
3470#endif
3471
3472#ifdef CONFIG_NET_KEY_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05003473static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3474 const struct xfrm_migrate *m, int num_bundles,
3475 const struct xfrm_kmaddress *k)
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003476{
3477 int i;
3478 int sasize_sel;
3479 int size = 0;
3480 int size_pol = 0;
3481 struct sk_buff *skb;
3482 struct sadb_msg *hdr;
3483 struct sadb_x_policy *pol;
David S. Miller183cad12011-02-24 00:28:01 -05003484 const struct xfrm_migrate *mp;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003485
3486 if (type != XFRM_POLICY_TYPE_MAIN)
3487 return 0;
3488
3489 if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
3490 return -EINVAL;
3491
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07003492 if (k != NULL) {
3493 /* addresses for KM */
3494 size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
3495 pfkey_sockaddr_pair_size(k->family));
3496 }
3497
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003498 /* selector */
3499 sasize_sel = pfkey_sockaddr_size(sel->family);
3500 if (!sasize_sel)
3501 return -EINVAL;
3502 size += (sizeof(struct sadb_address) + sasize_sel) * 2;
3503
3504 /* policy info */
3505 size_pol += sizeof(struct sadb_x_policy);
3506
3507 /* ipsecrequests */
3508 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3509 /* old locator pair */
3510 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3511 pfkey_sockaddr_pair_size(mp->old_family);
3512 /* new locator pair */
3513 size_pol += sizeof(struct sadb_x_ipsecrequest) +
3514 pfkey_sockaddr_pair_size(mp->new_family);
3515 }
3516
3517 size += sizeof(struct sadb_msg) + size_pol;
3518
3519 /* alloc buffer */
3520 skb = alloc_skb(size, GFP_ATOMIC);
3521 if (skb == NULL)
3522 return -ENOMEM;
3523
3524 hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
3525 hdr->sadb_msg_version = PF_KEY_V2;
3526 hdr->sadb_msg_type = SADB_X_MIGRATE;
3527 hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
3528 hdr->sadb_msg_len = size / 8;
3529 hdr->sadb_msg_errno = 0;
3530 hdr->sadb_msg_reserved = 0;
3531 hdr->sadb_msg_seq = 0;
3532 hdr->sadb_msg_pid = 0;
3533
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07003534 /* Addresses to be used by KM for negotiation, if ext is available */
3535 if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
Julia Lawall89eb06f2012-04-08 22:41:10 +00003536 goto err;
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07003537
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003538 /* selector src */
3539 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
3540
3541 /* selector dst */
3542 set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
3543
3544 /* policy information */
3545 pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
3546 pol->sadb_x_policy_len = size_pol / 8;
3547 pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3548 pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
3549 pol->sadb_x_policy_dir = dir + 1;
Dan Carpenterff862a42013-07-28 23:04:45 +03003550 pol->sadb_x_policy_reserved = 0;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003551 pol->sadb_x_policy_id = 0;
3552 pol->sadb_x_policy_priority = 0;
3553
3554 for (i = 0, mp = m; i < num_bundles; i++, mp++) {
3555 /* old ipsecrequest */
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07003556 int mode = pfkey_mode_from_xfrm(mp->mode);
3557 if (mode < 0)
Patrick McHardyd4782c32008-01-20 17:24:29 -08003558 goto err;
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07003559 if (set_ipsecrequest(skb, mp->proto, mode,
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003560 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3561 mp->reqid, mp->old_family,
Patrick McHardyd4782c32008-01-20 17:24:29 -08003562 &mp->old_saddr, &mp->old_daddr) < 0)
3563 goto err;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003564
3565 /* new ipsecrequest */
Kazunori MIYAZAWA55569ce2007-04-17 12:32:20 -07003566 if (set_ipsecrequest(skb, mp->proto, mode,
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003567 (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
3568 mp->reqid, mp->new_family,
Patrick McHardyd4782c32008-01-20 17:24:29 -08003569 &mp->new_saddr, &mp->new_daddr) < 0)
3570 goto err;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003571 }
3572
3573 /* broadcast migrate message to sockets */
Alexey Dobriyan07fb0f12008-11-25 17:58:31 -08003574 pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003575
3576 return 0;
Patrick McHardyd4782c32008-01-20 17:24:29 -08003577
3578err:
3579 kfree_skb(skb);
3580 return -EINVAL;
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003581}
3582#else
David S. Miller183cad12011-02-24 00:28:01 -05003583static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3584 const struct xfrm_migrate *m, int num_bundles,
3585 const struct xfrm_kmaddress *k)
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003586{
3587 return -ENOPROTOOPT;
3588}
3589#endif
3590
Linus Torvalds1da177e2005-04-16 15:20:36 -07003591static int pfkey_sendmsg(struct kiocb *kiocb,
3592 struct socket *sock, struct msghdr *msg, size_t len)
3593{
3594 struct sock *sk = sock->sk;
3595 struct sk_buff *skb = NULL;
3596 struct sadb_msg *hdr = NULL;
3597 int err;
Fan Du283bc9f2013-11-07 17:47:50 +08003598 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003599
3600 err = -EOPNOTSUPP;
3601 if (msg->msg_flags & MSG_OOB)
3602 goto out;
3603
3604 err = -EMSGSIZE;
Eric Dumazet95c96172012-04-15 05:58:06 +00003605 if ((unsigned int)len > sk->sk_sndbuf - 32)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003606 goto out;
3607
3608 err = -ENOBUFS;
3609 skb = alloc_skb(len, GFP_KERNEL);
3610 if (skb == NULL)
3611 goto out;
3612
3613 err = -EFAULT;
Al Viro6ce8e9c2014-04-06 21:25:44 -04003614 if (memcpy_from_msg(skb_put(skb,len), msg, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003615 goto out;
3616
3617 hdr = pfkey_get_base_msg(skb, &err);
3618 if (!hdr)
3619 goto out;
3620
Fan Du283bc9f2013-11-07 17:47:50 +08003621 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003622 err = pfkey_process(sk, skb, hdr);
Fan Du283bc9f2013-11-07 17:47:50 +08003623 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003624
3625out:
3626 if (err && hdr && pfkey_error(hdr, err, sk) == 0)
3627 err = 0;
Wei Yongjun6f961062009-02-25 00:31:04 +00003628 kfree_skb(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003629
3630 return err ? : len;
3631}
3632
3633static int pfkey_recvmsg(struct kiocb *kiocb,
3634 struct socket *sock, struct msghdr *msg, size_t len,
3635 int flags)
3636{
3637 struct sock *sk = sock->sk;
Timo Teras83321d62008-03-03 23:40:12 -08003638 struct pfkey_sock *pfk = pfkey_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 struct sk_buff *skb;
3640 int copied, err;
3641
3642 err = -EINVAL;
3643 if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
3644 goto out;
3645
Linus Torvalds1da177e2005-04-16 15:20:36 -07003646 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
3647 if (skb == NULL)
3648 goto out;
3649
3650 copied = skb->len;
3651 if (copied > len) {
3652 msg->msg_flags |= MSG_TRUNC;
3653 copied = len;
3654 }
3655
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -03003656 skb_reset_transport_header(skb);
David S. Miller51f3d022014-11-05 16:46:40 -05003657 err = skb_copy_datagram_msg(skb, 0, msg, copied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003658 if (err)
3659 goto out_free;
3660
Neil Horman3b885782009-10-12 13:26:31 -07003661 sock_recv_ts_and_drops(msg, sk, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003662
3663 err = (flags & MSG_TRUNC) ? skb->len : copied;
3664
Timo Teras83321d62008-03-03 23:40:12 -08003665 if (pfk->dump.dump != NULL &&
3666 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
3667 pfkey_do_dump(pfk);
3668
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669out_free:
3670 skb_free_datagram(sk, skb);
3671out:
3672 return err;
3673}
3674
Eric Dumazet90ddc4f2005-12-22 12:49:22 -08003675static const struct proto_ops pfkey_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003676 .family = PF_KEY,
3677 .owner = THIS_MODULE,
3678 /* Operations that make no sense on pfkey sockets. */
3679 .bind = sock_no_bind,
3680 .connect = sock_no_connect,
3681 .socketpair = sock_no_socketpair,
3682 .accept = sock_no_accept,
3683 .getname = sock_no_getname,
3684 .ioctl = sock_no_ioctl,
3685 .listen = sock_no_listen,
3686 .shutdown = sock_no_shutdown,
3687 .setsockopt = sock_no_setsockopt,
3688 .getsockopt = sock_no_getsockopt,
3689 .mmap = sock_no_mmap,
3690 .sendpage = sock_no_sendpage,
3691
3692 /* Now the operations that really occur. */
3693 .release = pfkey_release,
3694 .poll = datagram_poll,
3695 .sendmsg = pfkey_sendmsg,
3696 .recvmsg = pfkey_recvmsg,
3697};
3698
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +00003699static const struct net_proto_family pfkey_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003700 .family = PF_KEY,
3701 .create = pfkey_create,
3702 .owner = THIS_MODULE,
3703};
3704
3705#ifdef CONFIG_PROC_FS
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003706static int pfkey_seq_show(struct seq_file *f, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003707{
Li Zefan27b5b862010-02-08 23:20:29 +00003708 struct sock *s = sk_entry(v);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003709
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003710 if (v == SEQ_START_TOKEN)
3711 seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
3712 else
Dan Rosenberg71338aa2011-05-23 12:17:35 +00003713 seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07003714 s,
3715 atomic_read(&s->sk_refcnt),
Eric Dumazet31e6d362009-06-17 19:05:41 -07003716 sk_rmem_alloc_get(s),
3717 sk_wmem_alloc_get(s),
Eric W. Biedermana7cb5a42012-05-24 01:10:10 -06003718 from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719 sock_i_ino(s)
3720 );
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003721 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003722}
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003723
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003724static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
stephen hemmingerada440e2011-02-23 09:06:50 +00003725 __acquires(rcu)
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003726{
Alexey Dobriyan7013ec32008-11-25 17:59:00 -08003727 struct net *net = seq_file_net(f);
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003728 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003729
stephen hemminger7f6b9db2010-02-22 07:57:19 +00003730 rcu_read_lock();
3731 return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003732}
3733
3734static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
3735{
Alexey Dobriyan7013ec32008-11-25 17:59:00 -08003736 struct net *net = seq_file_net(f);
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003737 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3738
stephen hemminger7f6b9db2010-02-22 07:57:19 +00003739 return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003740}
3741
3742static void pfkey_seq_stop(struct seq_file *f, void *v)
stephen hemmingerada440e2011-02-23 09:06:50 +00003743 __releases(rcu)
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003744{
stephen hemminger7f6b9db2010-02-22 07:57:19 +00003745 rcu_read_unlock();
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003746}
3747
Stephen Hemminger98147d52009-09-01 19:25:02 +00003748static const struct seq_operations pfkey_seq_ops = {
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003749 .start = pfkey_seq_start,
3750 .next = pfkey_seq_next,
3751 .stop = pfkey_seq_stop,
3752 .show = pfkey_seq_show,
3753};
3754
3755static int pfkey_seq_open(struct inode *inode, struct file *file)
3756{
Alexey Dobriyan7013ec32008-11-25 17:59:00 -08003757 return seq_open_net(inode, file, &pfkey_seq_ops,
3758 sizeof(struct seq_net_private));
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003759}
3760
Stephen Hemminger5ca1b992009-09-01 19:25:05 +00003761static const struct file_operations pfkey_proc_ops = {
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003762 .open = pfkey_seq_open,
3763 .read = seq_read,
3764 .llseek = seq_lseek,
Alexey Dobriyan7013ec32008-11-25 17:59:00 -08003765 .release = seq_release_net,
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003766};
3767
Alexey Dobriyan7013ec32008-11-25 17:59:00 -08003768static int __net_init pfkey_init_proc(struct net *net)
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003769{
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003770 struct proc_dir_entry *e;
3771
Gao fengd4beaa62013-02-18 01:34:54 +00003772 e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003773 if (e == NULL)
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003774 return -ENOMEM;
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003775
Pavel Emelyanovbd2f7472008-02-09 23:20:06 -08003776 return 0;
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003777}
3778
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003779static void __net_exit pfkey_exit_proc(struct net *net)
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003780{
Gao fengece31ff2013-02-18 01:34:56 +00003781 remove_proc_entry("pfkey", net->proc_net);
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003782}
3783#else
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003784static inline int pfkey_init_proc(struct net *net)
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003785{
3786 return 0;
3787}
3788
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003789static inline void pfkey_exit_proc(struct net *net)
Pavel Emelyanov61145aa2008-02-09 23:19:14 -08003790{
3791}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003792#endif
3793
3794static struct xfrm_mgr pfkeyv2_mgr =
3795{
3796 .id = "pfkeyv2",
3797 .notify = pfkey_send_notify,
3798 .acquire = pfkey_send_acquire,
3799 .compile_policy = pfkey_compile_policy,
3800 .new_mapping = pfkey_send_new_mapping,
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07003801 .notify_policy = pfkey_send_policy_notify,
Shinta Sugimoto08de61b2007-02-08 13:14:33 -08003802 .migrate = pfkey_send_migrate,
Horia Geanta0f245582014-02-12 16:20:06 +02003803 .is_alive = pfkey_is_alive,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003804};
3805
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003806static int __net_init pfkey_net_init(struct net *net)
3807{
Eric W. Biederman23c049c2009-11-29 15:46:06 +00003808 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003809 int rv;
3810
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003811 INIT_HLIST_HEAD(&net_pfkey->table);
3812 atomic_set(&net_pfkey->socks_nr, 0);
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003813
Eric W. Biederman23c049c2009-11-29 15:46:06 +00003814 rv = pfkey_init_proc(net);
3815
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003816 return rv;
3817}
3818
3819static void __net_exit pfkey_net_exit(struct net *net)
3820{
3821 struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
3822
Alexey Dobriyan7013ec32008-11-25 17:59:00 -08003823 pfkey_exit_proc(net);
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003824 BUG_ON(!hlist_empty(&net_pfkey->table));
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003825}
3826
3827static struct pernet_operations pfkey_net_ops = {
3828 .init = pfkey_net_init,
3829 .exit = pfkey_net_exit,
Eric W. Biederman23c049c2009-11-29 15:46:06 +00003830 .id = &pfkey_net_id,
3831 .size = sizeof(struct netns_pfkey),
Alexey Dobriyan3fa87a32008-11-25 17:58:07 -08003832};
3833
Linus Torvalds1da177e2005-04-16 15:20:36 -07003834static void __exit ipsec_pfkey_exit(void)
3835{
3836 xfrm_unregister_km(&pfkeyv2_mgr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837 sock_unregister(PF_KEY);
Alexey Dobriyan180211b2010-01-30 02:53:27 +00003838 unregister_pernet_subsys(&pfkey_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003839 proto_unregister(&key_proto);
3840}
3841
3842static int __init ipsec_pfkey_init(void)
3843{
3844 int err = proto_register(&key_proto, 0);
3845
3846 if (err != 0)
3847 goto out;
3848
Alexey Dobriyan180211b2010-01-30 02:53:27 +00003849 err = register_pernet_subsys(&pfkey_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003850 if (err != 0)
3851 goto out_unregister_key_proto;
Alexey Dobriyan180211b2010-01-30 02:53:27 +00003852 err = sock_register(&pfkey_family_ops);
3853 if (err != 0)
3854 goto out_unregister_pernet;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003855 err = xfrm_register_km(&pfkeyv2_mgr);
3856 if (err != 0)
Alexey Dobriyan7013ec32008-11-25 17:59:00 -08003857 goto out_sock_unregister;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003858out:
3859 return err;
Alexey Dobriyan180211b2010-01-30 02:53:27 +00003860
Linus Torvalds1da177e2005-04-16 15:20:36 -07003861out_sock_unregister:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003862 sock_unregister(PF_KEY);
Alexey Dobriyan180211b2010-01-30 02:53:27 +00003863out_unregister_pernet:
3864 unregister_pernet_subsys(&pfkey_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003865out_unregister_key_proto:
3866 proto_unregister(&key_proto);
3867 goto out;
3868}
3869
3870module_init(ipsec_pfkey_init);
3871module_exit(ipsec_pfkey_exit);
3872MODULE_LICENSE("GPL");
3873MODULE_ALIAS_NETPROTO(PF_KEY);