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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. | |
4 | * | |
1da177e4 LT |
5 | * Authors: Maxim Giryaev <gem@asplinux.ru> |
6 | * David S. Miller <davem@redhat.com> | |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
8 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
9 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> | |
10 | * Derek Atkins <derek@ihtfp.com> | |
11 | */ | |
12 | ||
4fc268d2 | 13 | #include <linux/capability.h> |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/socket.h> | |
17 | #include <linux/pfkeyv2.h> | |
18 | #include <linux/ipsec.h> | |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/rtnetlink.h> | |
21 | #include <linux/in.h> | |
22 | #include <linux/in6.h> | |
23 | #include <linux/proc_fs.h> | |
24 | #include <linux/init.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
457c4cbc | 26 | #include <net/net_namespace.h> |
3fa87a32 | 27 | #include <net/netns/generic.h> |
1da177e4 LT |
28 | #include <net/xfrm.h> |
29 | ||
30 | #include <net/sock.h> | |
31 | ||
32 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) | |
33 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) | |
34 | ||
c7d03a00 | 35 | static unsigned int pfkey_net_id __read_mostly; |
3fa87a32 AD |
36 | struct netns_pfkey { |
37 | /* List of all pfkey sockets. */ | |
38 | struct hlist_head table; | |
39 | atomic_t socks_nr; | |
40 | }; | |
7f6b9dbd | 41 | static DEFINE_MUTEX(pfkey_mutex); |
1da177e4 | 42 | |
bd55775c | 43 | #define DUMMY_MARK 0 |
e473fcb4 | 44 | static const struct xfrm_mark dummy_mark = {0, 0}; |
1da177e4 LT |
45 | struct pfkey_sock { |
46 | /* struct sock must be the first member of struct pfkey_sock */ | |
47 | struct sock sk; | |
48 | int registered; | |
49 | int promisc; | |
83321d6b TT |
50 | |
51 | struct { | |
52 | uint8_t msg_version; | |
15e47304 | 53 | uint32_t msg_portid; |
83321d6b TT |
54 | int (*dump)(struct pfkey_sock *sk); |
55 | void (*done)(struct pfkey_sock *sk); | |
56 | union { | |
57 | struct xfrm_policy_walk policy; | |
58 | struct xfrm_state_walk state; | |
59 | } u; | |
12a169e7 | 60 | struct sk_buff *skb; |
83321d6b | 61 | } dump; |
89e357d8 | 62 | struct mutex dump_lock; |
1da177e4 LT |
63 | }; |
64 | ||
096f41d3 HX |
65 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
66 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
67 | u16 *family); | |
68 | ||
1da177e4 LT |
69 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) |
70 | { | |
71 | return (struct pfkey_sock *)sk; | |
72 | } | |
73 | ||
4c93fbb0 | 74 | static int pfkey_can_dump(const struct sock *sk) |
83321d6b TT |
75 | { |
76 | if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) | |
77 | return 1; | |
78 | return 0; | |
79 | } | |
80 | ||
05238204 | 81 | static void pfkey_terminate_dump(struct pfkey_sock *pfk) |
83321d6b | 82 | { |
05238204 | 83 | if (pfk->dump.dump) { |
12a169e7 HX |
84 | if (pfk->dump.skb) { |
85 | kfree_skb(pfk->dump.skb); | |
86 | pfk->dump.skb = NULL; | |
87 | } | |
05238204 TT |
88 | pfk->dump.done(pfk); |
89 | pfk->dump.dump = NULL; | |
90 | pfk->dump.done = NULL; | |
91 | } | |
83321d6b TT |
92 | } |
93 | ||
1da177e4 LT |
94 | static void pfkey_sock_destruct(struct sock *sk) |
95 | { | |
3fa87a32 AD |
96 | struct net *net = sock_net(sk); |
97 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
98 | ||
05238204 | 99 | pfkey_terminate_dump(pfkey_sk(sk)); |
1da177e4 LT |
100 | skb_queue_purge(&sk->sk_receive_queue); |
101 | ||
102 | if (!sock_flag(sk, SOCK_DEAD)) { | |
207024b9 | 103 | pr_err("Attempt to release alive pfkey socket: %p\n", sk); |
1da177e4 LT |
104 | return; |
105 | } | |
106 | ||
547b792c | 107 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
14afee4b | 108 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
1da177e4 | 109 | |
3fa87a32 | 110 | atomic_dec(&net_pfkey->socks_nr); |
1da177e4 LT |
111 | } |
112 | ||
90ddc4f0 | 113 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
114 | |
115 | static void pfkey_insert(struct sock *sk) | |
116 | { | |
3fa87a32 AD |
117 | struct net *net = sock_net(sk); |
118 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
119 | ||
7f6b9dbd | 120 | mutex_lock(&pfkey_mutex); |
121 | sk_add_node_rcu(sk, &net_pfkey->table); | |
122 | mutex_unlock(&pfkey_mutex); | |
1da177e4 LT |
123 | } |
124 | ||
125 | static void pfkey_remove(struct sock *sk) | |
126 | { | |
7f6b9dbd | 127 | mutex_lock(&pfkey_mutex); |
128 | sk_del_node_init_rcu(sk); | |
129 | mutex_unlock(&pfkey_mutex); | |
1da177e4 LT |
130 | } |
131 | ||
132 | static struct proto key_proto = { | |
133 | .name = "KEY", | |
134 | .owner = THIS_MODULE, | |
135 | .obj_size = sizeof(struct pfkey_sock), | |
136 | }; | |
137 | ||
3f378b68 EP |
138 | static int pfkey_create(struct net *net, struct socket *sock, int protocol, |
139 | int kern) | |
1da177e4 | 140 | { |
3fa87a32 | 141 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 142 | struct sock *sk; |
89e357d8 | 143 | struct pfkey_sock *pfk; |
1da177e4 LT |
144 | int err; |
145 | ||
df008c91 | 146 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
147 | return -EPERM; |
148 | if (sock->type != SOCK_RAW) | |
149 | return -ESOCKTNOSUPPORT; | |
150 | if (protocol != PF_KEY_V2) | |
151 | return -EPROTONOSUPPORT; | |
152 | ||
153 | err = -ENOMEM; | |
11aa9c28 | 154 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern); |
1da177e4 LT |
155 | if (sk == NULL) |
156 | goto out; | |
8ff24541 | 157 | |
89e357d8 YS |
158 | pfk = pfkey_sk(sk); |
159 | mutex_init(&pfk->dump_lock); | |
160 | ||
1da177e4 LT |
161 | sock->ops = &pfkey_ops; |
162 | sock_init_data(sock, sk); | |
163 | ||
164 | sk->sk_family = PF_KEY; | |
165 | sk->sk_destruct = pfkey_sock_destruct; | |
166 | ||
3fa87a32 | 167 | atomic_inc(&net_pfkey->socks_nr); |
1da177e4 LT |
168 | |
169 | pfkey_insert(sk); | |
170 | ||
171 | return 0; | |
172 | out: | |
173 | return err; | |
174 | } | |
175 | ||
176 | static int pfkey_release(struct socket *sock) | |
177 | { | |
178 | struct sock *sk = sock->sk; | |
179 | ||
180 | if (!sk) | |
181 | return 0; | |
182 | ||
183 | pfkey_remove(sk); | |
184 | ||
185 | sock_orphan(sk); | |
186 | sock->sk = NULL; | |
187 | skb_queue_purge(&sk->sk_write_queue); | |
7f6b9dbd | 188 | |
189 | synchronize_rcu(); | |
1da177e4 LT |
190 | sock_put(sk); |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
fc2d5cfd ST |
195 | static int pfkey_broadcast_one(struct sk_buff *skb, gfp_t allocation, |
196 | struct sock *sk) | |
1da177e4 LT |
197 | { |
198 | int err = -ENOBUFS; | |
199 | ||
fc2d5cfd ST |
200 | if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf) |
201 | return err; | |
202 | ||
203 | skb = skb_clone(skb, allocation); | |
204 | ||
205 | if (skb) { | |
206 | skb_set_owner_r(skb, sk); | |
207 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
208 | sk->sk_data_ready(sk); | |
209 | err = 0; | |
1da177e4 | 210 | } |
1da177e4 LT |
211 | return err; |
212 | } | |
213 | ||
214 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
215 | #define BROADCAST_ALL 0 | |
216 | #define BROADCAST_ONE 1 | |
217 | #define BROADCAST_REGISTERED 2 | |
218 | #define BROADCAST_PROMISC_ONLY 4 | |
36f41f8f | 219 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
07fb0f17 AD |
220 | int broadcast_flags, struct sock *one_sk, |
221 | struct net *net) | |
1da177e4 | 222 | { |
3fa87a32 | 223 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 224 | struct sock *sk; |
1da177e4 LT |
225 | int err = -ESRCH; |
226 | ||
227 | /* XXX Do we need something like netlink_overrun? I think | |
228 | * XXX PF_KEY socket apps will not mind current behavior. | |
229 | */ | |
230 | if (!skb) | |
231 | return -ENOMEM; | |
232 | ||
7f6b9dbd | 233 | rcu_read_lock(); |
b67bfe0d | 234 | sk_for_each_rcu(sk, &net_pfkey->table) { |
1da177e4 LT |
235 | struct pfkey_sock *pfk = pfkey_sk(sk); |
236 | int err2; | |
237 | ||
238 | /* Yes, it means that if you are meant to receive this | |
239 | * pfkey message you receive it twice as promiscuous | |
240 | * socket. | |
241 | */ | |
242 | if (pfk->promisc) | |
fc2d5cfd | 243 | pfkey_broadcast_one(skb, GFP_ATOMIC, sk); |
1da177e4 LT |
244 | |
245 | /* the exact target will be processed later */ | |
246 | if (sk == one_sk) | |
247 | continue; | |
248 | if (broadcast_flags != BROADCAST_ALL) { | |
249 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
250 | continue; | |
251 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
252 | !pfk->registered) | |
253 | continue; | |
254 | if (broadcast_flags & BROADCAST_ONE) | |
255 | continue; | |
256 | } | |
257 | ||
fc2d5cfd | 258 | err2 = pfkey_broadcast_one(skb, GFP_ATOMIC, sk); |
1da177e4 | 259 | |
f6b8dec9 | 260 | /* Error is cleared after successful sending to at least one |
1da177e4 LT |
261 | * registered KM */ |
262 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
263 | err = err2; | |
264 | } | |
7f6b9dbd | 265 | rcu_read_unlock(); |
1da177e4 LT |
266 | |
267 | if (one_sk != NULL) | |
fc2d5cfd | 268 | err = pfkey_broadcast_one(skb, allocation, one_sk); |
1da177e4 | 269 | |
1da177e4 LT |
270 | kfree_skb(skb); |
271 | return err; | |
272 | } | |
273 | ||
05238204 TT |
274 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
275 | { | |
12a169e7 | 276 | struct sadb_msg *hdr; |
05238204 TT |
277 | int rc; |
278 | ||
89e357d8 YS |
279 | mutex_lock(&pfk->dump_lock); |
280 | if (!pfk->dump.dump) { | |
281 | rc = 0; | |
282 | goto out; | |
283 | } | |
284 | ||
05238204 | 285 | rc = pfk->dump.dump(pfk); |
89e357d8 YS |
286 | if (rc == -ENOBUFS) { |
287 | rc = 0; | |
288 | goto out; | |
289 | } | |
05238204 | 290 | |
12a169e7 | 291 | if (pfk->dump.skb) { |
89e357d8 YS |
292 | if (!pfkey_can_dump(&pfk->sk)) { |
293 | rc = 0; | |
294 | goto out; | |
295 | } | |
12a169e7 HX |
296 | |
297 | hdr = (struct sadb_msg *) pfk->dump.skb->data; | |
298 | hdr->sadb_msg_seq = 0; | |
299 | hdr->sadb_msg_errno = rc; | |
36f41f8f | 300 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 301 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
302 | pfk->dump.skb = NULL; |
303 | } | |
304 | ||
05238204 | 305 | pfkey_terminate_dump(pfk); |
89e357d8 YS |
306 | |
307 | out: | |
308 | mutex_unlock(&pfk->dump_lock); | |
05238204 TT |
309 | return rc; |
310 | } | |
311 | ||
4c93fbb0 DM |
312 | static inline void pfkey_hdr_dup(struct sadb_msg *new, |
313 | const struct sadb_msg *orig) | |
1da177e4 LT |
314 | { |
315 | *new = *orig; | |
316 | } | |
317 | ||
4c93fbb0 | 318 | static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk) |
1da177e4 LT |
319 | { |
320 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
321 | struct sadb_msg *hdr; | |
322 | ||
323 | if (!skb) | |
324 | return -ENOBUFS; | |
325 | ||
326 | /* Woe be to the platform trying to support PFKEY yet | |
327 | * having normal errnos outside the 1-255 range, inclusive. | |
328 | */ | |
329 | err = -err; | |
330 | if (err == ERESTARTSYS || | |
331 | err == ERESTARTNOHAND || | |
332 | err == ERESTARTNOINTR) | |
333 | err = EINTR; | |
334 | if (err >= 512) | |
335 | err = EINVAL; | |
09a62660 | 336 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 | 337 | |
4df864c1 | 338 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
339 | pfkey_hdr_dup(hdr, orig); |
340 | hdr->sadb_msg_errno = (uint8_t) err; | |
341 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
342 | sizeof(uint64_t)); | |
343 | ||
36f41f8f | 344 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
345 | |
346 | return 0; | |
347 | } | |
348 | ||
8603b955 | 349 | static const u8 sadb_ext_min_len[] = { |
1da177e4 LT |
350 | [SADB_EXT_RESERVED] = (u8) 0, |
351 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
352 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
353 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
354 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
355 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
356 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
357 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
358 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
359 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
360 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
361 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
362 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
363 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
364 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
365 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
366 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
367 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
368 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
369 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
370 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
371 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
372 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
373 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 374 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
13c1d189 | 375 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
d2c5f658 | 376 | [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter), |
1da177e4 LT |
377 | }; |
378 | ||
379 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
4c93fbb0 | 380 | static int verify_address_len(const void *p) |
1da177e4 | 381 | { |
4c93fbb0 DM |
382 | const struct sadb_address *sp = p; |
383 | const struct sockaddr *addr = (const struct sockaddr *)(sp + 1); | |
384 | const struct sockaddr_in *sin; | |
dfd56b8b | 385 | #if IS_ENABLED(CONFIG_IPV6) |
4c93fbb0 | 386 | const struct sockaddr_in6 *sin6; |
1da177e4 LT |
387 | #endif |
388 | int len; | |
389 | ||
06b335cb EB |
390 | if (sp->sadb_address_len < |
391 | DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family), | |
392 | sizeof(uint64_t))) | |
393 | return -EINVAL; | |
394 | ||
1da177e4 LT |
395 | switch (addr->sa_family) { |
396 | case AF_INET: | |
356f89e1 | 397 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
398 | if (sp->sadb_address_len != len || |
399 | sp->sadb_address_prefixlen > 32) | |
400 | return -EINVAL; | |
401 | break; | |
dfd56b8b | 402 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 403 | case AF_INET6: |
356f89e1 | 404 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
405 | if (sp->sadb_address_len != len || |
406 | sp->sadb_address_prefixlen > 128) | |
407 | return -EINVAL; | |
408 | break; | |
409 | #endif | |
410 | default: | |
411 | /* It is user using kernel to keep track of security | |
412 | * associations for another protocol, such as | |
413 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
414 | * lengths. | |
415 | * | |
416 | * XXX Actually, association/policy database is not yet | |
417 | * XXX able to cope with arbitrary sockaddr families. | |
418 | * XXX When it can, remove this -EINVAL. -DaveM | |
419 | */ | |
420 | return -EINVAL; | |
3ff50b79 | 421 | } |
1da177e4 LT |
422 | |
423 | return 0; | |
424 | } | |
425 | ||
4b66af2d KE |
426 | static inline int sadb_key_len(const struct sadb_key *key) |
427 | { | |
428 | int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8); | |
429 | ||
430 | return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes, | |
431 | sizeof(uint64_t)); | |
432 | } | |
433 | ||
434 | static int verify_key_len(const void *p) | |
435 | { | |
436 | const struct sadb_key *key = p; | |
437 | ||
438 | if (sadb_key_len(key) > key->sadb_key_len) | |
439 | return -EINVAL; | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
4c93fbb0 | 444 | static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx) |
df71837d | 445 | { |
356f89e1 IJ |
446 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
447 | sec_ctx->sadb_x_ctx_len, | |
448 | sizeof(uint64_t)); | |
df71837d TJ |
449 | } |
450 | ||
4c93fbb0 | 451 | static inline int verify_sec_ctx_len(const void *p) |
df71837d | 452 | { |
4c93fbb0 | 453 | const struct sadb_x_sec_ctx *sec_ctx = p; |
298bb621 | 454 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 455 | |
298bb621 | 456 | if (len > PAGE_SIZE) |
df71837d TJ |
457 | return -EINVAL; |
458 | ||
459 | len = pfkey_sec_ctx_len(sec_ctx); | |
460 | ||
461 | if (sec_ctx->sadb_x_sec_len != len) | |
462 | return -EINVAL; | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
87536a81 NA |
467 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx, |
468 | gfp_t gfp) | |
df71837d TJ |
469 | { |
470 | struct xfrm_user_sec_ctx *uctx = NULL; | |
471 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
472 | ||
87536a81 | 473 | uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp); |
df71837d TJ |
474 | |
475 | if (!uctx) | |
476 | return NULL; | |
477 | ||
478 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
479 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
480 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
481 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
482 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
483 | memcpy(uctx + 1, sec_ctx + 1, | |
484 | uctx->ctx_len); | |
485 | ||
486 | return uctx; | |
487 | } | |
488 | ||
4c93fbb0 DM |
489 | static int present_and_same_family(const struct sadb_address *src, |
490 | const struct sadb_address *dst) | |
1da177e4 | 491 | { |
4c93fbb0 | 492 | const struct sockaddr *s_addr, *d_addr; |
1da177e4 LT |
493 | |
494 | if (!src || !dst) | |
495 | return 0; | |
496 | ||
4c93fbb0 DM |
497 | s_addr = (const struct sockaddr *)(src + 1); |
498 | d_addr = (const struct sockaddr *)(dst + 1); | |
1da177e4 LT |
499 | if (s_addr->sa_family != d_addr->sa_family) |
500 | return 0; | |
501 | if (s_addr->sa_family != AF_INET | |
dfd56b8b | 502 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
503 | && s_addr->sa_family != AF_INET6 |
504 | #endif | |
505 | ) | |
506 | return 0; | |
507 | ||
508 | return 1; | |
509 | } | |
510 | ||
4c93fbb0 | 511 | static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs) |
1da177e4 | 512 | { |
4c93fbb0 | 513 | const char *p = (char *) hdr; |
1da177e4 LT |
514 | int len = skb->len; |
515 | ||
516 | len -= sizeof(*hdr); | |
517 | p += sizeof(*hdr); | |
518 | while (len > 0) { | |
4c93fbb0 | 519 | const struct sadb_ext *ehdr = (const struct sadb_ext *) p; |
1da177e4 LT |
520 | uint16_t ext_type; |
521 | int ext_len; | |
522 | ||
4e765b49 EB |
523 | if (len < sizeof(*ehdr)) |
524 | return -EINVAL; | |
525 | ||
1da177e4 LT |
526 | ext_len = ehdr->sadb_ext_len; |
527 | ext_len *= sizeof(uint64_t); | |
528 | ext_type = ehdr->sadb_ext_type; | |
529 | if (ext_len < sizeof(uint64_t) || | |
530 | ext_len > len || | |
531 | ext_type == SADB_EXT_RESERVED) | |
532 | return -EINVAL; | |
533 | ||
534 | if (ext_type <= SADB_EXT_MAX) { | |
535 | int min = (int) sadb_ext_min_len[ext_type]; | |
536 | if (ext_len < min) | |
537 | return -EINVAL; | |
538 | if (ext_hdrs[ext_type-1] != NULL) | |
539 | return -EINVAL; | |
4b66af2d KE |
540 | switch (ext_type) { |
541 | case SADB_EXT_ADDRESS_SRC: | |
542 | case SADB_EXT_ADDRESS_DST: | |
543 | case SADB_EXT_ADDRESS_PROXY: | |
544 | case SADB_X_EXT_NAT_T_OA: | |
1da177e4 LT |
545 | if (verify_address_len(p)) |
546 | return -EINVAL; | |
4b66af2d KE |
547 | break; |
548 | case SADB_X_EXT_SEC_CTX: | |
df71837d TJ |
549 | if (verify_sec_ctx_len(p)) |
550 | return -EINVAL; | |
4b66af2d KE |
551 | break; |
552 | case SADB_EXT_KEY_AUTH: | |
553 | case SADB_EXT_KEY_ENCRYPT: | |
554 | if (verify_key_len(p)) | |
555 | return -EINVAL; | |
556 | break; | |
557 | default: | |
558 | break; | |
df71837d | 559 | } |
4c93fbb0 | 560 | ext_hdrs[ext_type-1] = (void *) p; |
1da177e4 LT |
561 | } |
562 | p += ext_len; | |
563 | len -= ext_len; | |
564 | } | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static uint16_t | |
570 | pfkey_satype2proto(uint8_t satype) | |
571 | { | |
572 | switch (satype) { | |
573 | case SADB_SATYPE_UNSPEC: | |
574 | return IPSEC_PROTO_ANY; | |
575 | case SADB_SATYPE_AH: | |
576 | return IPPROTO_AH; | |
577 | case SADB_SATYPE_ESP: | |
578 | return IPPROTO_ESP; | |
579 | case SADB_X_SATYPE_IPCOMP: | |
580 | return IPPROTO_COMP; | |
1da177e4 LT |
581 | default: |
582 | return 0; | |
583 | } | |
584 | /* NOTREACHED */ | |
585 | } | |
586 | ||
587 | static uint8_t | |
588 | pfkey_proto2satype(uint16_t proto) | |
589 | { | |
590 | switch (proto) { | |
591 | case IPPROTO_AH: | |
592 | return SADB_SATYPE_AH; | |
593 | case IPPROTO_ESP: | |
594 | return SADB_SATYPE_ESP; | |
595 | case IPPROTO_COMP: | |
596 | return SADB_X_SATYPE_IPCOMP; | |
1da177e4 LT |
597 | default: |
598 | return 0; | |
599 | } | |
600 | /* NOTREACHED */ | |
601 | } | |
602 | ||
603 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
604 | * say specifically 'just raw sockets' as we encode them as 255. | |
605 | */ | |
606 | ||
607 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
608 | { | |
a02cec21 | 609 | return proto == IPSEC_PROTO_ANY ? 0 : proto; |
1da177e4 LT |
610 | } |
611 | ||
612 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
613 | { | |
a02cec21 | 614 | return proto ? proto : IPSEC_PROTO_ANY; |
1da177e4 LT |
615 | } |
616 | ||
9e8b4ed8 YH |
617 | static inline int pfkey_sockaddr_len(sa_family_t family) |
618 | { | |
619 | switch (family) { | |
620 | case AF_INET: | |
621 | return sizeof(struct sockaddr_in); | |
dfd56b8b | 622 | #if IS_ENABLED(CONFIG_IPV6) |
9e8b4ed8 YH |
623 | case AF_INET6: |
624 | return sizeof(struct sockaddr_in6); | |
625 | #endif | |
626 | } | |
627 | return 0; | |
628 | } | |
629 | ||
5f95ac91 YH |
630 | static |
631 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 632 | { |
5f95ac91 | 633 | switch (sa->sa_family) { |
1da177e4 | 634 | case AF_INET: |
8ff24541 | 635 | xaddr->a4 = |
5f95ac91 | 636 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 | 637 | return AF_INET; |
dfd56b8b | 638 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 639 | case AF_INET6: |
8ff24541 | 640 | memcpy(xaddr->a6, |
5f95ac91 | 641 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
642 | sizeof(struct in6_addr)); |
643 | return AF_INET6; | |
644 | #endif | |
1da177e4 | 645 | } |
5f95ac91 YH |
646 | return 0; |
647 | } | |
648 | ||
649 | static | |
4c93fbb0 | 650 | int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr) |
5f95ac91 YH |
651 | { |
652 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
653 | xaddr); | |
1da177e4 LT |
654 | } |
655 | ||
4c93fbb0 | 656 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 657 | { |
4c93fbb0 DM |
658 | const struct sadb_sa *sa; |
659 | const struct sadb_address *addr; | |
1da177e4 LT |
660 | uint16_t proto; |
661 | unsigned short family; | |
662 | xfrm_address_t *xaddr; | |
663 | ||
ea110733 | 664 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
665 | if (sa == NULL) |
666 | return NULL; | |
667 | ||
668 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
669 | if (proto == 0) | |
670 | return NULL; | |
671 | ||
672 | /* sadb_address_len should be checked by caller */ | |
ea110733 | 673 | addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
1da177e4 LT |
674 | if (addr == NULL) |
675 | return NULL; | |
676 | ||
4c93fbb0 | 677 | family = ((const struct sockaddr *)(addr + 1))->sa_family; |
1da177e4 LT |
678 | switch (family) { |
679 | case AF_INET: | |
4c93fbb0 | 680 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr; |
1da177e4 | 681 | break; |
dfd56b8b | 682 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 683 | case AF_INET6: |
4c93fbb0 | 684 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr; |
1da177e4 LT |
685 | break; |
686 | #endif | |
687 | default: | |
688 | xaddr = NULL; | |
689 | } | |
690 | ||
691 | if (!xaddr) | |
692 | return NULL; | |
693 | ||
bd55775c | 694 | return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family); |
1da177e4 LT |
695 | } |
696 | ||
697 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 698 | |
1da177e4 LT |
699 | static int |
700 | pfkey_sockaddr_size(sa_family_t family) | |
701 | { | |
9e8b4ed8 | 702 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
703 | } |
704 | ||
55569ce2 KM |
705 | static inline int pfkey_mode_from_xfrm(int mode) |
706 | { | |
707 | switch(mode) { | |
708 | case XFRM_MODE_TRANSPORT: | |
709 | return IPSEC_MODE_TRANSPORT; | |
710 | case XFRM_MODE_TUNNEL: | |
711 | return IPSEC_MODE_TUNNEL; | |
712 | case XFRM_MODE_BEET: | |
713 | return IPSEC_MODE_BEET; | |
714 | default: | |
715 | return -1; | |
716 | } | |
717 | } | |
718 | ||
719 | static inline int pfkey_mode_to_xfrm(int mode) | |
720 | { | |
721 | switch(mode) { | |
722 | case IPSEC_MODE_ANY: /*XXX*/ | |
723 | case IPSEC_MODE_TRANSPORT: | |
724 | return XFRM_MODE_TRANSPORT; | |
725 | case IPSEC_MODE_TUNNEL: | |
726 | return XFRM_MODE_TUNNEL; | |
727 | case IPSEC_MODE_BEET: | |
728 | return XFRM_MODE_BEET; | |
729 | default: | |
730 | return -1; | |
731 | } | |
732 | } | |
733 | ||
183cad12 | 734 | static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port, |
4c93fbb0 DM |
735 | struct sockaddr *sa, |
736 | unsigned short family) | |
e5b56652 YH |
737 | { |
738 | switch (family) { | |
739 | case AF_INET: | |
740 | { | |
741 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
742 | sin->sin_family = AF_INET; | |
743 | sin->sin_port = port; | |
744 | sin->sin_addr.s_addr = xaddr->a4; | |
745 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
746 | return 32; | |
747 | } | |
dfd56b8b | 748 | #if IS_ENABLED(CONFIG_IPV6) |
e5b56652 YH |
749 | case AF_INET6: |
750 | { | |
751 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
752 | sin6->sin6_family = AF_INET6; | |
753 | sin6->sin6_port = port; | |
754 | sin6->sin6_flowinfo = 0; | |
15e318bd | 755 | sin6->sin6_addr = xaddr->in6; |
e5b56652 YH |
756 | sin6->sin6_scope_id = 0; |
757 | return 128; | |
758 | } | |
759 | #endif | |
760 | } | |
761 | return 0; | |
762 | } | |
763 | ||
4c93fbb0 | 764 | static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, |
050f009e | 765 | int add_keys, int hsc) |
1da177e4 LT |
766 | { |
767 | struct sk_buff *skb; | |
768 | struct sadb_msg *hdr; | |
769 | struct sadb_sa *sa; | |
770 | struct sadb_lifetime *lifetime; | |
771 | struct sadb_address *addr; | |
772 | struct sadb_key *key; | |
773 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
774 | struct sadb_x_sec_ctx *sec_ctx; |
775 | struct xfrm_sec_ctx *xfrm_ctx; | |
776 | int ctx_size = 0; | |
1da177e4 LT |
777 | int size; |
778 | int auth_key_size = 0; | |
779 | int encrypt_key_size = 0; | |
780 | int sockaddr_size; | |
781 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 782 | int mode; |
1da177e4 LT |
783 | |
784 | /* address family check */ | |
785 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
786 | if (!sockaddr_size) | |
787 | return ERR_PTR(-EINVAL); | |
788 | ||
789 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
790 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 791 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
792 | sizeof(struct sadb_lifetime) + |
793 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
794 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 795 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
796 | sockaddr_size*2 + |
797 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
798 | |
799 | if ((xfrm_ctx = x->security)) { | |
800 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
801 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
802 | } | |
803 | ||
1da177e4 | 804 | /* identity & sensitivity */ |
70e94e66 | 805 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
806 | size += sizeof(struct sadb_address) + sockaddr_size; |
807 | ||
808 | if (add_keys) { | |
809 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
810 | auth_key_size = |
811 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
812 | size += sizeof(struct sadb_key) + auth_key_size; |
813 | } | |
814 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
815 | encrypt_key_size = |
816 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
817 | size += sizeof(struct sadb_key) + encrypt_key_size; |
818 | } | |
819 | } | |
820 | if (x->encap) | |
821 | natt = x->encap; | |
822 | ||
823 | if (natt && natt->encap_type) { | |
824 | size += sizeof(struct sadb_x_nat_t_type); | |
825 | size += sizeof(struct sadb_x_nat_t_port); | |
826 | size += sizeof(struct sadb_x_nat_t_port); | |
827 | } | |
828 | ||
829 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
830 | if (skb == NULL) | |
831 | return ERR_PTR(-ENOBUFS); | |
832 | ||
833 | /* call should fill header later */ | |
4df864c1 | 834 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
835 | memset(hdr, 0, size); /* XXX do we need this ? */ |
836 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
837 | ||
838 | /* sa */ | |
4df864c1 | 839 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
840 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
841 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
842 | sa->sadb_sa_spi = x->id.spi; | |
843 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
844 | switch (x->km.state) { |
845 | case XFRM_STATE_VALID: | |
846 | sa->sadb_sa_state = x->km.dying ? | |
847 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
848 | break; | |
849 | case XFRM_STATE_ACQ: | |
1da177e4 | 850 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
851 | break; |
852 | default: | |
1da177e4 | 853 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
854 | break; |
855 | } | |
1da177e4 LT |
856 | sa->sadb_sa_auth = 0; |
857 | if (x->aalg) { | |
858 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
7e50f84c JK |
859 | sa->sadb_sa_auth = (a && a->pfkey_supported) ? |
860 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
861 | } |
862 | sa->sadb_sa_encrypt = 0; | |
863 | BUG_ON(x->ealg && x->calg); | |
864 | if (x->ealg) { | |
865 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
7e50f84c JK |
866 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
867 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
868 | } |
869 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
870 | if (x->calg) { | |
871 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
7e50f84c JK |
872 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
873 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
874 | } |
875 | ||
876 | sa->sadb_sa_flags = 0; | |
877 | if (x->props.flags & XFRM_STATE_NOECN) | |
878 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
879 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
880 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
881 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
882 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
883 | |
884 | /* hard time */ | |
885 | if (hsc & 2) { | |
4df864c1 | 886 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
887 | lifetime->sadb_lifetime_len = |
888 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
889 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
890 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
891 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
892 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
893 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
894 | } | |
895 | /* soft time */ | |
896 | if (hsc & 1) { | |
4df864c1 | 897 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
898 | lifetime->sadb_lifetime_len = |
899 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
900 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
901 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
902 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
903 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
904 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
905 | } | |
906 | /* current time */ | |
4df864c1 | 907 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
908 | lifetime->sadb_lifetime_len = |
909 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
910 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
911 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
912 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
913 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
914 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
915 | /* src address */ | |
4df864c1 | 916 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 917 | addr->sadb_address_len = |
1da177e4 LT |
918 | (sizeof(struct sadb_address)+sockaddr_size)/ |
919 | sizeof(uint64_t); | |
920 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
921 | /* "if the ports are non-zero, then the sadb_address_proto field, |
922 | normally zero, MUST be filled in with the transport | |
1da177e4 | 923 | protocol's number." - RFC2367 */ |
8ff24541 | 924 | addr->sadb_address_proto = 0; |
1da177e4 | 925 | addr->sadb_address_reserved = 0; |
1da177e4 | 926 | |
e5b56652 YH |
927 | addr->sadb_address_prefixlen = |
928 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
929 | (struct sockaddr *) (addr + 1), | |
930 | x->props.family); | |
de47c5d8 | 931 | BUG_ON(!addr->sadb_address_prefixlen); |
1da177e4 LT |
932 | |
933 | /* dst address */ | |
4df864c1 | 934 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 935 | addr->sadb_address_len = |
1da177e4 LT |
936 | (sizeof(struct sadb_address)+sockaddr_size)/ |
937 | sizeof(uint64_t); | |
938 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 939 | addr->sadb_address_proto = 0; |
1da177e4 | 940 | addr->sadb_address_reserved = 0; |
1da177e4 | 941 | |
e5b56652 YH |
942 | addr->sadb_address_prefixlen = |
943 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
944 | (struct sockaddr *) (addr + 1), | |
945 | x->props.family); | |
de47c5d8 | 946 | BUG_ON(!addr->sadb_address_prefixlen); |
1da177e4 | 947 | |
70e94e66 YH |
948 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, |
949 | x->props.family)) { | |
4df864c1 JB |
950 | addr = skb_put(skb, |
951 | sizeof(struct sadb_address) + sockaddr_size); | |
e5b56652 YH |
952 | addr->sadb_address_len = |
953 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
954 | sizeof(uint64_t); | |
955 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
956 | addr->sadb_address_proto = | |
957 | pfkey_proto_from_xfrm(x->sel.proto); | |
958 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
959 | addr->sadb_address_reserved = 0; | |
1da177e4 | 960 | |
e5b56652 YH |
961 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
962 | (struct sockaddr *) (addr + 1), | |
963 | x->props.family); | |
1da177e4 | 964 | } |
1da177e4 LT |
965 | |
966 | /* auth key */ | |
967 | if (add_keys && auth_key_size) { | |
4df864c1 | 968 | key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size); |
1da177e4 LT |
969 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / |
970 | sizeof(uint64_t); | |
971 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
972 | key->sadb_key_bits = x->aalg->alg_key_len; | |
973 | key->sadb_key_reserved = 0; | |
974 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
975 | } | |
976 | /* encrypt key */ | |
977 | if (add_keys && encrypt_key_size) { | |
4df864c1 | 978 | key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size); |
8ff24541 | 979 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
980 | encrypt_key_size) / sizeof(uint64_t); |
981 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
982 | key->sadb_key_bits = x->ealg->alg_key_len; | |
983 | key->sadb_key_reserved = 0; | |
8ff24541 | 984 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
985 | (x->ealg->alg_key_len+7)/8); |
986 | } | |
987 | ||
988 | /* sa */ | |
4df864c1 | 989 | sa2 = skb_put(skb, sizeof(struct sadb_x_sa2)); |
1da177e4 LT |
990 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); |
991 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
992 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
993 | kfree_skb(skb); | |
994 | return ERR_PTR(-EINVAL); | |
995 | } | |
996 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
997 | sa2->sadb_x_sa2_reserved1 = 0; |
998 | sa2->sadb_x_sa2_reserved2 = 0; | |
999 | sa2->sadb_x_sa2_sequence = 0; | |
1000 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
1001 | ||
1002 | if (natt && natt->encap_type) { | |
1003 | struct sadb_x_nat_t_type *n_type; | |
1004 | struct sadb_x_nat_t_port *n_port; | |
1005 | ||
1006 | /* type */ | |
4df864c1 | 1007 | n_type = skb_put(skb, sizeof(*n_type)); |
1da177e4 LT |
1008 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); |
1009 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
1010 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
1011 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
1012 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
1013 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
1014 | ||
1015 | /* source port */ | |
4df864c1 | 1016 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
1017 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
1018 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
1019 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
1020 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1021 | ||
1022 | /* dest port */ | |
4df864c1 | 1023 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
1024 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
1025 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
1026 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
1027 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1028 | } | |
1029 | ||
df71837d TJ |
1030 | /* security context */ |
1031 | if (xfrm_ctx) { | |
4df864c1 JB |
1032 | sec_ctx = skb_put(skb, |
1033 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
df71837d TJ |
1034 | sec_ctx->sadb_x_sec_len = |
1035 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1036 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1037 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1038 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1039 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1040 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1041 | xfrm_ctx->ctx_len); | |
1042 | } | |
1043 | ||
1da177e4 LT |
1044 | return skb; |
1045 | } | |
1046 | ||
050f009e | 1047 | |
4c93fbb0 | 1048 | static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x) |
050f009e HX |
1049 | { |
1050 | struct sk_buff *skb; | |
1051 | ||
050f009e | 1052 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1053 | |
1054 | return skb; | |
1055 | } | |
1056 | ||
4c93fbb0 | 1057 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x, |
050f009e HX |
1058 | int hsc) |
1059 | { | |
1060 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1061 | } | |
1062 | ||
07fb0f17 | 1063 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
4c93fbb0 DM |
1064 | const struct sadb_msg *hdr, |
1065 | void * const *ext_hdrs) | |
1da177e4 | 1066 | { |
8ff24541 | 1067 | struct xfrm_state *x; |
4c93fbb0 DM |
1068 | const struct sadb_lifetime *lifetime; |
1069 | const struct sadb_sa *sa; | |
1070 | const struct sadb_key *key; | |
1071 | const struct sadb_x_sec_ctx *sec_ctx; | |
1da177e4 LT |
1072 | uint16_t proto; |
1073 | int err; | |
8ff24541 | 1074 | |
1da177e4 | 1075 | |
ea110733 | 1076 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
1077 | if (!sa || |
1078 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1079 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1080 | return ERR_PTR(-EINVAL); | |
1081 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1082 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1083 | return ERR_PTR(-EINVAL); | |
1084 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1085 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1086 | return ERR_PTR(-EINVAL); | |
1087 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1088 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1089 | return ERR_PTR(-EINVAL); | |
1090 | ||
1091 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1092 | if (proto == 0) | |
1093 | return ERR_PTR(-EINVAL); | |
1094 | ||
1095 | /* default error is no buffer space */ | |
1096 | err = -ENOBUFS; | |
1097 | ||
1098 | /* RFC2367: | |
1099 | ||
1100 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1101 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1102 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1103 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1104 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1105 | not true. | |
1106 | ||
8ff24541 | 1107 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1108 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1109 | */ | |
1110 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1111 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1112 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1113 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1114 | return ERR_PTR(-EINVAL); | |
ea110733 | 1115 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1116 | if (key != NULL && |
1117 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
4b66af2d | 1118 | key->sadb_key_bits == 0) |
1da177e4 LT |
1119 | return ERR_PTR(-EINVAL); |
1120 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1121 | if (key != NULL && | |
1122 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
4b66af2d | 1123 | key->sadb_key_bits == 0) |
1da177e4 LT |
1124 | return ERR_PTR(-EINVAL); |
1125 | ||
07fb0f17 | 1126 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1127 | if (x == NULL) |
1128 | return ERR_PTR(-ENOBUFS); | |
1129 | ||
1130 | x->id.proto = proto; | |
1131 | x->id.spi = sa->sadb_sa_spi; | |
33fce60d FD |
1132 | x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay, |
1133 | (sizeof(x->replay.bitmap) * 8)); | |
1da177e4 LT |
1134 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) |
1135 | x->props.flags |= XFRM_STATE_NOECN; | |
1136 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1137 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1138 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1139 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 | 1140 | |
ea110733 | 1141 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1]; |
1da177e4 LT |
1142 | if (lifetime != NULL) { |
1143 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1144 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1145 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1146 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1147 | } | |
ea110733 | 1148 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1]; |
1da177e4 LT |
1149 | if (lifetime != NULL) { |
1150 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1151 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1152 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1153 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1154 | } | |
df71837d | 1155 | |
ea110733 | 1156 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 1157 | if (sec_ctx != NULL) { |
87536a81 | 1158 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
1159 | |
1160 | if (!uctx) | |
1161 | goto out; | |
1162 | ||
1163 | err = security_xfrm_state_alloc(x, uctx); | |
1164 | kfree(uctx); | |
1165 | ||
1166 | if (err) | |
1167 | goto out; | |
1168 | } | |
1169 | ||
e747f643 | 1170 | err = -ENOBUFS; |
ea110733 | 1171 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1172 | if (sa->sadb_sa_auth) { |
1173 | int keysize = 0; | |
1174 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
7e50f84c | 1175 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1176 | err = -ENOSYS; |
1177 | goto out; | |
1178 | } | |
1179 | if (key) | |
1180 | keysize = (key->sadb_key_bits + 7) / 8; | |
1181 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1182 | if (!x->aalg) { |
1183 | err = -ENOMEM; | |
1da177e4 | 1184 | goto out; |
1e3d0c2c | 1185 | } |
1da177e4 LT |
1186 | strcpy(x->aalg->alg_name, a->name); |
1187 | x->aalg->alg_key_len = 0; | |
1188 | if (key) { | |
1189 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1190 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1191 | } | |
c20a66f4 | 1192 | x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1da177e4 LT |
1193 | x->props.aalgo = sa->sadb_sa_auth; |
1194 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1195 | } | |
1196 | if (sa->sadb_sa_encrypt) { | |
1197 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1198 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1199 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1200 | err = -ENOSYS; |
1201 | goto out; | |
1202 | } | |
1203 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1e3d0c2c DC |
1204 | if (!x->calg) { |
1205 | err = -ENOMEM; | |
1da177e4 | 1206 | goto out; |
1e3d0c2c | 1207 | } |
1da177e4 LT |
1208 | strcpy(x->calg->alg_name, a->name); |
1209 | x->props.calgo = sa->sadb_sa_encrypt; | |
1210 | } else { | |
1211 | int keysize = 0; | |
1212 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1213 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1214 | err = -ENOSYS; |
1215 | goto out; | |
1216 | } | |
1217 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1218 | if (key) | |
1219 | keysize = (key->sadb_key_bits + 7) / 8; | |
1220 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1221 | if (!x->ealg) { |
1222 | err = -ENOMEM; | |
1da177e4 | 1223 | goto out; |
1e3d0c2c | 1224 | } |
1da177e4 LT |
1225 | strcpy(x->ealg->alg_name, a->name); |
1226 | x->ealg->alg_key_len = 0; | |
1227 | if (key) { | |
1228 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1229 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1230 | } | |
1231 | x->props.ealgo = sa->sadb_sa_encrypt; | |
69b0137f | 1232 | x->geniv = a->uinfo.encr.geniv; |
1da177e4 LT |
1233 | } |
1234 | } | |
1235 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1236 | ||
8ff24541 | 1237 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 | 1238 | &x->props.saddr); |
8ff24541 | 1239 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1240 | &x->id.daddr); |
1241 | ||
1242 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
4c93fbb0 | 1243 | const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1]; |
55569ce2 KM |
1244 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1245 | if (mode < 0) { | |
1246 | err = -EINVAL; | |
1247 | goto out; | |
1248 | } | |
1249 | x->props.mode = mode; | |
1da177e4 LT |
1250 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1251 | } | |
1252 | ||
1253 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
4c93fbb0 | 1254 | const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; |
1da177e4 LT |
1255 | |
1256 | /* Nobody uses this, but we try. */ | |
1257 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1258 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1259 | } | |
1260 | ||
4da51056 | 1261 | if (!x->sel.family) |
4a4b6271 JL |
1262 | x->sel.family = x->props.family; |
1263 | ||
1da177e4 | 1264 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
4c93fbb0 | 1265 | const struct sadb_x_nat_t_type* n_type; |
1da177e4 LT |
1266 | struct xfrm_encap_tmpl *natt; |
1267 | ||
1268 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1e3d0c2c DC |
1269 | if (!x->encap) { |
1270 | err = -ENOMEM; | |
1da177e4 | 1271 | goto out; |
1e3d0c2c | 1272 | } |
1da177e4 LT |
1273 | |
1274 | natt = x->encap; | |
1275 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1276 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1277 | ||
1278 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
4c93fbb0 | 1279 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1280 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; |
1281 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1282 | } | |
1283 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
4c93fbb0 | 1284 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1285 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; |
1286 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1287 | } | |
a8d694c6 | 1288 | memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1da177e4 LT |
1289 | } |
1290 | ||
72cb6962 HX |
1291 | err = xfrm_init_state(x); |
1292 | if (err) | |
1da177e4 | 1293 | goto out; |
72cb6962 | 1294 | |
1da177e4 | 1295 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1296 | return x; |
1297 | ||
1298 | out: | |
1299 | x->km.state = XFRM_STATE_DEAD; | |
1300 | xfrm_state_put(x); | |
1301 | return ERR_PTR(err); | |
1302 | } | |
1303 | ||
4c93fbb0 | 1304 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1305 | { |
1306 | return -EOPNOTSUPP; | |
1307 | } | |
1308 | ||
4c93fbb0 | 1309 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1310 | { |
07fb0f17 | 1311 | struct net *net = sock_net(sk); |
1da177e4 LT |
1312 | struct sk_buff *resp_skb; |
1313 | struct sadb_x_sa2 *sa2; | |
1314 | struct sadb_address *saddr, *daddr; | |
1315 | struct sadb_msg *out_hdr; | |
658b219e | 1316 | struct sadb_spirange *range; |
1da177e4 | 1317 | struct xfrm_state *x = NULL; |
55569ce2 | 1318 | int mode; |
658b219e HX |
1319 | int err; |
1320 | u32 min_spi, max_spi; | |
1da177e4 LT |
1321 | u32 reqid; |
1322 | u8 proto; | |
1323 | unsigned short family; | |
1324 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1325 | ||
1326 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1327 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1328 | return -EINVAL; | |
1329 | ||
1330 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1331 | if (proto == 0) | |
1332 | return -EINVAL; | |
1333 | ||
1334 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1335 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1336 | if (mode < 0) | |
1337 | return -EINVAL; | |
1da177e4 LT |
1338 | reqid = sa2->sadb_x_sa2_reqid; |
1339 | } else { | |
1340 | mode = 0; | |
1341 | reqid = 0; | |
1342 | } | |
1343 | ||
1344 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1345 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1346 | ||
1347 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1348 | switch (family) { | |
1349 | case AF_INET: | |
1350 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1351 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1352 | break; | |
dfd56b8b | 1353 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1354 | case AF_INET6: |
1355 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1356 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1357 | break; | |
1358 | #endif | |
1359 | } | |
1360 | ||
1361 | if (hdr->sadb_msg_seq) { | |
bd55775c | 1362 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
70e94e66 | 1363 | if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) { |
1da177e4 LT |
1364 | xfrm_state_put(x); |
1365 | x = NULL; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | if (!x) | |
7e652640 | 1370 | x = xfrm_find_acq(net, &dummy_mark, mode, reqid, 0, proto, xdaddr, xsaddr, 1, family); |
1da177e4 LT |
1371 | |
1372 | if (x == NULL) | |
1373 | return -ENOENT; | |
1374 | ||
658b219e HX |
1375 | min_spi = 0x100; |
1376 | max_spi = 0x0fffffff; | |
1da177e4 | 1377 | |
658b219e HX |
1378 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1379 | if (range) { | |
1380 | min_spi = range->sadb_spirange_min; | |
1381 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1382 | } |
658b219e | 1383 | |
776e9dd9 FD |
1384 | err = verify_spi_info(x->id.proto, min_spi, max_spi); |
1385 | if (err) { | |
1386 | xfrm_state_put(x); | |
1387 | return err; | |
1388 | } | |
1389 | ||
658b219e | 1390 | err = xfrm_alloc_spi(x, min_spi, max_spi); |
050f009e | 1391 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1392 | |
1393 | if (IS_ERR(resp_skb)) { | |
1394 | xfrm_state_put(x); | |
1395 | return PTR_ERR(resp_skb); | |
1396 | } | |
1397 | ||
1398 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1399 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1400 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1401 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1402 | out_hdr->sadb_msg_errno = 0; | |
1403 | out_hdr->sadb_msg_reserved = 0; | |
1404 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1405 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1406 | ||
1407 | xfrm_state_put(x); | |
1408 | ||
36f41f8f | 1409 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4 LT |
1410 | |
1411 | return 0; | |
1412 | } | |
1413 | ||
4c93fbb0 | 1414 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1415 | { |
07fb0f17 | 1416 | struct net *net = sock_net(sk); |
1da177e4 LT |
1417 | struct xfrm_state *x; |
1418 | ||
1419 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1420 | return -EOPNOTSUPP; | |
1421 | ||
1422 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1423 | return 0; | |
1424 | ||
bd55775c | 1425 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4 LT |
1426 | if (x == NULL) |
1427 | return 0; | |
1428 | ||
1429 | spin_lock_bh(&x->lock); | |
5b8ef341 | 1430 | if (x->km.state == XFRM_STATE_ACQ) |
1da177e4 | 1431 | x->km.state = XFRM_STATE_ERROR; |
5b8ef341 | 1432 | |
1da177e4 LT |
1433 | spin_unlock_bh(&x->lock); |
1434 | xfrm_state_put(x); | |
1435 | return 0; | |
1436 | } | |
1437 | ||
26b15dad JHS |
1438 | static inline int event2poltype(int event) |
1439 | { | |
1440 | switch (event) { | |
f60f6b8f | 1441 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1442 | return SADB_X_SPDDELETE; |
f60f6b8f | 1443 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1444 | return SADB_X_SPDADD; |
f60f6b8f | 1445 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1446 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1447 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1448 | // return SADB_X_SPDEXPIRE; |
1449 | default: | |
207024b9 | 1450 | pr_err("pfkey: Unknown policy event %d\n", event); |
26b15dad JHS |
1451 | break; |
1452 | } | |
1453 | ||
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | static inline int event2keytype(int event) | |
1458 | { | |
1459 | switch (event) { | |
f60f6b8f | 1460 | case XFRM_MSG_DELSA: |
26b15dad | 1461 | return SADB_DELETE; |
f60f6b8f | 1462 | case XFRM_MSG_NEWSA: |
26b15dad | 1463 | return SADB_ADD; |
f60f6b8f | 1464 | case XFRM_MSG_UPDSA: |
26b15dad | 1465 | return SADB_UPDATE; |
f60f6b8f | 1466 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1467 | return SADB_EXPIRE; |
1468 | default: | |
207024b9 | 1469 | pr_err("pfkey: Unknown SA event %d\n", event); |
26b15dad JHS |
1470 | break; |
1471 | } | |
1472 | ||
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | /* ADD/UPD/DEL */ | |
214e005b | 1477 | static int key_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1478 | { |
1479 | struct sk_buff *skb; | |
1480 | struct sadb_msg *hdr; | |
26b15dad | 1481 | |
050f009e | 1482 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1483 | |
1484 | if (IS_ERR(skb)) | |
1485 | return PTR_ERR(skb); | |
1486 | ||
1487 | hdr = (struct sadb_msg *) skb->data; | |
1488 | hdr->sadb_msg_version = PF_KEY_V2; | |
1489 | hdr->sadb_msg_type = event2keytype(c->event); | |
1490 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1491 | hdr->sadb_msg_errno = 0; | |
1492 | hdr->sadb_msg_reserved = 0; | |
1493 | hdr->sadb_msg_seq = c->seq; | |
15e47304 | 1494 | hdr->sadb_msg_pid = c->portid; |
26b15dad | 1495 | |
36f41f8f | 1496 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad JHS |
1497 | |
1498 | return 0; | |
1499 | } | |
1da177e4 | 1500 | |
4c93fbb0 | 1501 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1502 | { |
07fb0f17 | 1503 | struct net *net = sock_net(sk); |
1da177e4 LT |
1504 | struct xfrm_state *x; |
1505 | int err; | |
26b15dad | 1506 | struct km_event c; |
1da177e4 | 1507 | |
07fb0f17 | 1508 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4 LT |
1509 | if (IS_ERR(x)) |
1510 | return PTR_ERR(x); | |
1511 | ||
26b15dad | 1512 | xfrm_state_hold(x); |
1da177e4 LT |
1513 | if (hdr->sadb_msg_type == SADB_ADD) |
1514 | err = xfrm_state_add(x); | |
1515 | else | |
1516 | err = xfrm_state_update(x); | |
1517 | ||
2e71029e | 1518 | xfrm_audit_state_add(x, err ? 0 : 1, true); |
161a09e7 | 1519 | |
1da177e4 LT |
1520 | if (err < 0) { |
1521 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1522 | __xfrm_state_put(x); |
7d6dfe1f | 1523 | goto out; |
1da177e4 LT |
1524 | } |
1525 | ||
26b15dad | 1526 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1527 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1528 | else |
f60f6b8f | 1529 | c.event = XFRM_MSG_UPDSA; |
26b15dad | 1530 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1531 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 1532 | km_state_notify(x, &c); |
7d6dfe1f | 1533 | out: |
26b15dad | 1534 | xfrm_state_put(x); |
26b15dad | 1535 | return err; |
1da177e4 LT |
1536 | } |
1537 | ||
4c93fbb0 | 1538 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1539 | { |
07fb0f17 | 1540 | struct net *net = sock_net(sk); |
1da177e4 | 1541 | struct xfrm_state *x; |
26b15dad JHS |
1542 | struct km_event c; |
1543 | int err; | |
1da177e4 LT |
1544 | |
1545 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1546 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1547 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1548 | return -EINVAL; | |
1549 | ||
07fb0f17 | 1550 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1551 | if (x == NULL) |
1552 | return -ESRCH; | |
1553 | ||
c8c05a8e CZ |
1554 | if ((err = security_xfrm_state_delete(x))) |
1555 | goto out; | |
1556 | ||
1da177e4 | 1557 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1558 | err = -EPERM; |
1559 | goto out; | |
1da177e4 | 1560 | } |
161a09e7 | 1561 | |
26b15dad | 1562 | err = xfrm_state_delete(x); |
161a09e7 | 1563 | |
c8c05a8e CZ |
1564 | if (err < 0) |
1565 | goto out; | |
1da177e4 | 1566 | |
26b15dad | 1567 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1568 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1569 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1570 | km_state_notify(x, &c); |
c8c05a8e | 1571 | out: |
2e71029e | 1572 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
26b15dad | 1573 | xfrm_state_put(x); |
1da177e4 | 1574 | |
26b15dad | 1575 | return err; |
1da177e4 LT |
1576 | } |
1577 | ||
4c93fbb0 | 1578 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1579 | { |
07fb0f17 | 1580 | struct net *net = sock_net(sk); |
1da177e4 LT |
1581 | __u8 proto; |
1582 | struct sk_buff *out_skb; | |
1583 | struct sadb_msg *out_hdr; | |
1584 | struct xfrm_state *x; | |
1585 | ||
1586 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1587 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1588 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1589 | return -EINVAL; | |
1590 | ||
07fb0f17 | 1591 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1592 | if (x == NULL) |
1593 | return -ESRCH; | |
1594 | ||
050f009e | 1595 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1596 | proto = x->id.proto; |
1597 | xfrm_state_put(x); | |
1598 | if (IS_ERR(out_skb)) | |
1599 | return PTR_ERR(out_skb); | |
1600 | ||
1601 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1602 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1603 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1604 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1605 | out_hdr->sadb_msg_errno = 0; | |
1606 | out_hdr->sadb_msg_reserved = 0; | |
1607 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1608 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 1609 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
1610 | |
1611 | return 0; | |
1612 | } | |
1613 | ||
4c93fbb0 | 1614 | static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, |
dd0fc66f | 1615 | gfp_t allocation) |
1da177e4 LT |
1616 | { |
1617 | struct sk_buff *skb; | |
1618 | struct sadb_msg *hdr; | |
1619 | int len, auth_len, enc_len, i; | |
1620 | ||
7e50f84c | 1621 | auth_len = xfrm_count_pfkey_auth_supported(); |
1da177e4 LT |
1622 | if (auth_len) { |
1623 | auth_len *= sizeof(struct sadb_alg); | |
1624 | auth_len += sizeof(struct sadb_supported); | |
1625 | } | |
8ff24541 | 1626 | |
7e50f84c | 1627 | enc_len = xfrm_count_pfkey_enc_supported(); |
1da177e4 LT |
1628 | if (enc_len) { |
1629 | enc_len *= sizeof(struct sadb_alg); | |
1630 | enc_len += sizeof(struct sadb_supported); | |
1631 | } | |
8ff24541 | 1632 | |
1da177e4 LT |
1633 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1634 | ||
1635 | skb = alloc_skb(len + 16, allocation); | |
1636 | if (!skb) | |
1637 | goto out_put_algs; | |
1638 | ||
4df864c1 | 1639 | hdr = skb_put(skb, sizeof(*hdr)); |
1da177e4 LT |
1640 | pfkey_hdr_dup(hdr, orig); |
1641 | hdr->sadb_msg_errno = 0; | |
1642 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1643 | ||
1644 | if (auth_len) { | |
1645 | struct sadb_supported *sp; | |
1646 | struct sadb_alg *ap; | |
1647 | ||
4df864c1 | 1648 | sp = skb_put(skb, auth_len); |
1da177e4 LT |
1649 | ap = (struct sadb_alg *) (sp + 1); |
1650 | ||
1651 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1652 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1653 | ||
1654 | for (i = 0; ; i++) { | |
1655 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1656 | if (!aalg) | |
1657 | break; | |
7e50f84c JK |
1658 | if (!aalg->pfkey_supported) |
1659 | continue; | |
1da177e4 LT |
1660 | if (aalg->available) |
1661 | *ap++ = aalg->desc; | |
1662 | } | |
1663 | } | |
1664 | ||
1665 | if (enc_len) { | |
1666 | struct sadb_supported *sp; | |
1667 | struct sadb_alg *ap; | |
1668 | ||
4df864c1 | 1669 | sp = skb_put(skb, enc_len); |
1da177e4 LT |
1670 | ap = (struct sadb_alg *) (sp + 1); |
1671 | ||
1672 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1673 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1674 | ||
1675 | for (i = 0; ; i++) { | |
1676 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1677 | if (!ealg) | |
1678 | break; | |
7e50f84c JK |
1679 | if (!ealg->pfkey_supported) |
1680 | continue; | |
1da177e4 LT |
1681 | if (ealg->available) |
1682 | *ap++ = ealg->desc; | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | out_put_algs: | |
1687 | return skb; | |
1688 | } | |
1689 | ||
4c93fbb0 | 1690 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1691 | { |
1692 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1693 | struct sk_buff *supp_skb; | |
1694 | ||
1695 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1696 | return -EINVAL; | |
1697 | ||
1698 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1699 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1700 | return -EEXIST; | |
1701 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1702 | } | |
1703 | ||
1704 | xfrm_probe_algs(); | |
8ff24541 | 1705 | |
1da177e4 LT |
1706 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1707 | if (!supp_skb) { | |
1708 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1709 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1710 | ||
1711 | return -ENOBUFS; | |
1712 | } | |
1713 | ||
36f41f8f ED |
1714 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, |
1715 | sock_net(sk)); | |
1da177e4 LT |
1716 | return 0; |
1717 | } | |
1718 | ||
4c93fbb0 | 1719 | static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr) |
8be987d7 JHS |
1720 | { |
1721 | struct sk_buff *skb; | |
1722 | struct sadb_msg *hdr; | |
1723 | ||
1724 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1725 | if (!skb) | |
1726 | return -ENOBUFS; | |
1727 | ||
59ae1d12 | 1728 | hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg)); |
8be987d7 JHS |
1729 | hdr->sadb_msg_errno = (uint8_t) 0; |
1730 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1731 | ||
36f41f8f ED |
1732 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, |
1733 | sock_net(sk)); | |
8be987d7 JHS |
1734 | } |
1735 | ||
214e005b | 1736 | static int key_notify_sa_flush(const struct km_event *c) |
26b15dad JHS |
1737 | { |
1738 | struct sk_buff *skb; | |
1739 | struct sadb_msg *hdr; | |
1740 | ||
1741 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1742 | if (!skb) | |
1743 | return -ENOBUFS; | |
4df864c1 | 1744 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
bf08867f | 1745 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1746 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad | 1747 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 1748 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
1749 | hdr->sadb_msg_version = PF_KEY_V2; |
1750 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1751 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
a5cc68f3 | 1752 | hdr->sadb_msg_reserved = 0; |
26b15dad | 1753 | |
36f41f8f | 1754 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad JHS |
1755 | |
1756 | return 0; | |
1757 | } | |
1758 | ||
4c93fbb0 | 1759 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1760 | { |
07fb0f17 | 1761 | struct net *net = sock_net(sk); |
95c96174 | 1762 | unsigned int proto; |
26b15dad | 1763 | struct km_event c; |
8be987d7 | 1764 | int err, err2; |
1da177e4 LT |
1765 | |
1766 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1767 | if (proto == 0) | |
1768 | return -EINVAL; | |
1769 | ||
f75a2804 | 1770 | err = xfrm_state_flush(net, proto, true, false); |
8be987d7 | 1771 | err2 = unicast_flush_resp(sk, hdr); |
9e64cc95 JHS |
1772 | if (err || err2) { |
1773 | if (err == -ESRCH) /* empty table - go quietly */ | |
1774 | err = 0; | |
8be987d7 | 1775 | return err ? err : err2; |
9e64cc95 | 1776 | } |
8be987d7 | 1777 | |
bf08867f | 1778 | c.data.proto = proto; |
26b15dad | 1779 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1780 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1781 | c.event = XFRM_MSG_FLUSHSA; |
07fb0f17 | 1782 | c.net = net; |
26b15dad | 1783 | km_state_notify(NULL, &c); |
1da177e4 LT |
1784 | |
1785 | return 0; | |
1786 | } | |
1787 | ||
1da177e4 LT |
1788 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1789 | { | |
83321d6b | 1790 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1791 | struct sk_buff *out_skb; |
1792 | struct sadb_msg *out_hdr; | |
1793 | ||
83321d6b TT |
1794 | if (!pfkey_can_dump(&pfk->sk)) |
1795 | return -ENOBUFS; | |
1796 | ||
050f009e | 1797 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1798 | if (IS_ERR(out_skb)) |
1799 | return PTR_ERR(out_skb); | |
1800 | ||
1801 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1802 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1803 | out_hdr->sadb_msg_type = SADB_DUMP; |
1804 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1805 | out_hdr->sadb_msg_errno = 0; | |
1806 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1807 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 1808 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
1809 | |
1810 | if (pfk->dump.skb) | |
36f41f8f | 1811 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 1812 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
1813 | pfk->dump.skb = out_skb; |
1814 | ||
1da177e4 LT |
1815 | return 0; |
1816 | } | |
1817 | ||
83321d6b TT |
1818 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1819 | { | |
07fb0f17 AD |
1820 | struct net *net = sock_net(&pfk->sk); |
1821 | return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); | |
83321d6b TT |
1822 | } |
1823 | ||
1824 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1825 | { | |
283bc9f3 FD |
1826 | struct net *net = sock_net(&pfk->sk); |
1827 | ||
1828 | xfrm_state_walk_done(&pfk->dump.u.state, net); | |
83321d6b TT |
1829 | } |
1830 | ||
4c93fbb0 | 1831 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1832 | { |
1833 | u8 proto; | |
870a2df4 | 1834 | struct xfrm_address_filter *filter = NULL; |
83321d6b TT |
1835 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1836 | ||
89e357d8 YS |
1837 | mutex_lock(&pfk->dump_lock); |
1838 | if (pfk->dump.dump != NULL) { | |
1839 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 1840 | return -EBUSY; |
89e357d8 | 1841 | } |
1da177e4 LT |
1842 | |
1843 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
89e357d8 YS |
1844 | if (proto == 0) { |
1845 | mutex_unlock(&pfk->dump_lock); | |
1da177e4 | 1846 | return -EINVAL; |
89e357d8 | 1847 | } |
1da177e4 | 1848 | |
d3623099 ND |
1849 | if (ext_hdrs[SADB_X_EXT_FILTER - 1]) { |
1850 | struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1]; | |
1851 | ||
1852 | filter = kmalloc(sizeof(*filter), GFP_KERNEL); | |
89e357d8 YS |
1853 | if (filter == NULL) { |
1854 | mutex_unlock(&pfk->dump_lock); | |
d3623099 | 1855 | return -ENOMEM; |
89e357d8 | 1856 | } |
d3623099 ND |
1857 | |
1858 | memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr, | |
1859 | sizeof(xfrm_address_t)); | |
1860 | memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr, | |
1861 | sizeof(xfrm_address_t)); | |
1862 | filter->family = xfilter->sadb_x_filter_family; | |
1863 | filter->splen = xfilter->sadb_x_filter_splen; | |
1864 | filter->dplen = xfilter->sadb_x_filter_dplen; | |
1865 | } | |
1866 | ||
83321d6b | 1867 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 1868 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
1869 | pfk->dump.dump = pfkey_dump_sa; |
1870 | pfk->dump.done = pfkey_dump_sa_done; | |
d3623099 | 1871 | xfrm_state_walk_init(&pfk->dump.u.state, proto, filter); |
89e357d8 | 1872 | mutex_unlock(&pfk->dump_lock); |
4c563f76 | 1873 | |
83321d6b | 1874 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1875 | } |
1876 | ||
4c93fbb0 | 1877 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1878 | { |
1879 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1880 | int satype = hdr->sadb_msg_satype; | |
4c93fbb0 | 1881 | bool reset_errno = false; |
1da177e4 LT |
1882 | |
1883 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
4c93fbb0 | 1884 | reset_errno = true; |
1da177e4 LT |
1885 | if (satype != 0 && satype != 1) |
1886 | return -EINVAL; | |
1887 | pfk->promisc = satype; | |
1888 | } | |
4c93fbb0 DM |
1889 | if (reset_errno && skb_cloned(skb)) |
1890 | skb = skb_copy(skb, GFP_KERNEL); | |
1891 | else | |
1892 | skb = skb_clone(skb, GFP_KERNEL); | |
1893 | ||
1894 | if (reset_errno && skb) { | |
1895 | struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data; | |
1896 | new_hdr->sadb_msg_errno = 0; | |
1897 | } | |
1898 | ||
36f41f8f | 1899 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk)); |
1da177e4 LT |
1900 | return 0; |
1901 | } | |
1902 | ||
1903 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1904 | { | |
1905 | int i; | |
1906 | u32 reqid = *(u32*)ptr; | |
1907 | ||
1908 | for (i=0; i<xp->xfrm_nr; i++) { | |
1909 | if (xp->xfrm_vec[i].reqid == reqid) | |
1910 | return -EEXIST; | |
1911 | } | |
1912 | return 0; | |
1913 | } | |
1914 | ||
07fb0f17 | 1915 | static u32 gen_reqid(struct net *net) |
1da177e4 | 1916 | { |
4c563f76 | 1917 | struct xfrm_policy_walk walk; |
1da177e4 | 1918 | u32 start; |
4c563f76 | 1919 | int rc; |
1da177e4 LT |
1920 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1921 | ||
1922 | start = reqid; | |
1923 | do { | |
1924 | ++reqid; | |
1925 | if (reqid == 0) | |
1926 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 | 1927 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f17 | 1928 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
283bc9f3 | 1929 | xfrm_policy_walk_done(&walk, net); |
4c563f76 | 1930 | if (rc != -EEXIST) |
1da177e4 LT |
1931 | return reqid; |
1932 | } while (reqid != start); | |
1933 | return 0; | |
1934 | } | |
1935 | ||
1936 | static int | |
1937 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1938 | { | |
07fb0f17 | 1939 | struct net *net = xp_net(xp); |
1da177e4 | 1940 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce2 | 1941 | int mode; |
1da177e4 LT |
1942 | |
1943 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1944 | return -ELOOP; | |
1945 | ||
1946 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1947 | return -EINVAL; | |
dbb2483b CW |
1948 | if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto)) |
1949 | return -EINVAL; | |
1da177e4 | 1950 | |
dbb2483b | 1951 | t->id.proto = rq->sadb_x_ipsecrequest_proto; |
55569ce2 KM |
1952 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1953 | return -EINVAL; | |
1954 | t->mode = mode; | |
1da177e4 LT |
1955 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1956 | t->optional = 1; | |
1957 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1958 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1959 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1960 | t->reqid = 0; | |
07fb0f17 | 1961 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4 LT |
1962 | return -ENOBUFS; |
1963 | } | |
1964 | ||
1965 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1966 | if (t->mode == XFRM_MODE_TUNNEL) { |
096f41d3 | 1967 | int err; |
5f95ac91 | 1968 | |
096f41d3 HX |
1969 | err = parse_sockaddr_pair( |
1970 | (struct sockaddr *)(rq + 1), | |
1971 | rq->sadb_x_ipsecrequest_len - sizeof(*rq), | |
1972 | &t->saddr, &t->id.daddr, &t->encap_family); | |
1973 | if (err) | |
1974 | return err; | |
2718aa7c MK |
1975 | } else |
1976 | t->encap_family = xp->family; | |
1977 | ||
1da177e4 | 1978 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1979 | t->allalgs = 1; |
1da177e4 LT |
1980 | xp->xfrm_nr++; |
1981 | return 0; | |
1982 | } | |
1983 | ||
1984 | static int | |
1985 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1986 | { | |
1987 | int err; | |
1988 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1989 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1990 | ||
f674e72f DC |
1991 | if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy)) |
1992 | return -EINVAL; | |
1993 | ||
096f41d3 HX |
1994 | while (len >= sizeof(*rq)) { |
1995 | if (len < rq->sadb_x_ipsecrequest_len || | |
1996 | rq->sadb_x_ipsecrequest_len < sizeof(*rq)) | |
1997 | return -EINVAL; | |
1998 | ||
1da177e4 LT |
1999 | if ((err = parse_ipsecrequest(xp, rq)) < 0) |
2000 | return err; | |
2001 | len -= rq->sadb_x_ipsecrequest_len; | |
2002 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
2003 | } | |
2004 | return 0; | |
2005 | } | |
2006 | ||
4c93fbb0 | 2007 | static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp) |
df71837d | 2008 | { |
4fc735d9 | 2009 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; |
df71837d TJ |
2010 | |
2011 | if (xfrm_ctx) { | |
2012 | int len = sizeof(struct sadb_x_sec_ctx); | |
2013 | len += xfrm_ctx->ctx_len; | |
2014 | return PFKEY_ALIGN8(len); | |
2015 | } | |
2016 | return 0; | |
2017 | } | |
2018 | ||
4c93fbb0 | 2019 | static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp) |
1da177e4 | 2020 | { |
4c93fbb0 | 2021 | const struct xfrm_tmpl *t; |
1da177e4 | 2022 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
2023 | int socklen = 0; |
2024 | int i; | |
2025 | ||
2026 | for (i=0; i<xp->xfrm_nr; i++) { | |
2027 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 2028 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 2029 | } |
1da177e4 LT |
2030 | |
2031 | return sizeof(struct sadb_msg) + | |
2032 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 2033 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
2034 | (sockaddr_size * 2) + |
2035 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
2036 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
2037 | (socklen * 2) + | |
df71837d | 2038 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
2039 | } |
2040 | ||
4c93fbb0 | 2041 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp) |
1da177e4 LT |
2042 | { |
2043 | struct sk_buff *skb; | |
2044 | int size; | |
2045 | ||
2046 | size = pfkey_xfrm_policy2msg_size(xp); | |
2047 | ||
2048 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
2049 | if (skb == NULL) | |
2050 | return ERR_PTR(-ENOBUFS); | |
2051 | ||
2052 | return skb; | |
2053 | } | |
2054 | ||
4c93fbb0 | 2055 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir) |
1da177e4 LT |
2056 | { |
2057 | struct sadb_msg *hdr; | |
2058 | struct sadb_address *addr; | |
2059 | struct sadb_lifetime *lifetime; | |
2060 | struct sadb_x_policy *pol; | |
df71837d TJ |
2061 | struct sadb_x_sec_ctx *sec_ctx; |
2062 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
2063 | int i; |
2064 | int size; | |
2065 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 2066 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
2067 | |
2068 | size = pfkey_xfrm_policy2msg_size(xp); | |
2069 | ||
2070 | /* call should fill header later */ | |
4df864c1 | 2071 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
2072 | memset(hdr, 0, size); /* XXX do we need this ? */ |
2073 | ||
2074 | /* src address */ | |
4df864c1 | 2075 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 2076 | addr->sadb_address_len = |
1da177e4 LT |
2077 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2078 | sizeof(uint64_t); | |
2079 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2080 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
2081 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
2082 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2083 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2084 | xp->selector.sport, | |
2085 | (struct sockaddr *) (addr + 1), | |
2086 | xp->family)) | |
1da177e4 LT |
2087 | BUG(); |
2088 | ||
2089 | /* dst address */ | |
4df864c1 | 2090 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
2091 | addr->sadb_address_len = |
2092 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2093 | sizeof(uint64_t); | |
2094 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2095 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2096 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2097 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2098 | |
2099 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2100 | (struct sockaddr *) (addr + 1), | |
2101 | xp->family); | |
1da177e4 LT |
2102 | |
2103 | /* hard time */ | |
4df864c1 | 2104 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2105 | lifetime->sadb_lifetime_len = |
2106 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2107 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2108 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2109 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2110 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2111 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2112 | /* soft time */ | |
4df864c1 | 2113 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2114 | lifetime->sadb_lifetime_len = |
2115 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2116 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2117 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2118 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2119 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2120 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2121 | /* current time */ | |
4df864c1 | 2122 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2123 | lifetime->sadb_lifetime_len = |
2124 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2125 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2126 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2127 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2128 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2129 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2130 | ||
4df864c1 | 2131 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
2132 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
2133 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2134 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2135 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2136 | if (xp->xfrm_nr) | |
2137 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2138 | else | |
2139 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2140 | } | |
2141 | pol->sadb_x_policy_dir = dir+1; | |
ff862a46 | 2142 | pol->sadb_x_policy_reserved = 0; |
1da177e4 LT |
2143 | pol->sadb_x_policy_id = xp->index; |
2144 | pol->sadb_x_policy_priority = xp->priority; | |
2145 | ||
2146 | for (i=0; i<xp->xfrm_nr; i++) { | |
4c93fbb0 | 2147 | const struct xfrm_tmpl *t = xp->xfrm_vec + i; |
1da177e4 | 2148 | struct sadb_x_ipsecrequest *rq; |
1da177e4 | 2149 | int req_size; |
55569ce2 | 2150 | int mode; |
1da177e4 LT |
2151 | |
2152 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2153 | if (t->mode == XFRM_MODE_TUNNEL) { |
2154 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2155 | req_size += socklen * 2; | |
2156 | } else { | |
1da177e4 | 2157 | size -= 2*socklen; |
e5b56652 | 2158 | } |
4df864c1 | 2159 | rq = skb_put(skb, req_size); |
1da177e4 LT |
2160 | pol->sadb_x_policy_len += req_size/8; |
2161 | memset(rq, 0, sizeof(*rq)); | |
2162 | rq->sadb_x_ipsecrequest_len = req_size; | |
2163 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2164 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2165 | return -EINVAL; | |
fefaa75e | 2166 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2167 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2168 | if (t->reqid) | |
2169 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2170 | if (t->optional) | |
2171 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2172 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2173 | |
7e49e6de | 2174 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2175 | u8 *sa = (void *)(rq + 1); |
2176 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2177 | (struct sockaddr *)sa, | |
2178 | t->encap_family); | |
2179 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2180 | (struct sockaddr *) (sa + socklen), | |
2181 | t->encap_family); | |
1da177e4 LT |
2182 | } |
2183 | } | |
df71837d TJ |
2184 | |
2185 | /* security context */ | |
2186 | if ((xfrm_ctx = xp->security)) { | |
2187 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2188 | ||
4df864c1 | 2189 | sec_ctx = skb_put(skb, ctx_size); |
df71837d TJ |
2190 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); |
2191 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2192 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2193 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2194 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2195 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2196 | xfrm_ctx->ctx_len); | |
2197 | } | |
2198 | ||
1da177e4 | 2199 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
850a6212 | 2200 | hdr->sadb_msg_reserved = refcount_read(&xp->refcnt); |
55569ce2 KM |
2201 | |
2202 | return 0; | |
1da177e4 LT |
2203 | } |
2204 | ||
214e005b | 2205 | static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2206 | { |
2207 | struct sk_buff *out_skb; | |
2208 | struct sadb_msg *out_hdr; | |
2209 | int err; | |
2210 | ||
2211 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
9a127aad DC |
2212 | if (IS_ERR(out_skb)) |
2213 | return PTR_ERR(out_skb); | |
2214 | ||
55569ce2 | 2215 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
1e532d2b SK |
2216 | if (err < 0) { |
2217 | kfree_skb(out_skb); | |
55569ce2 | 2218 | return err; |
1e532d2b | 2219 | } |
26b15dad JHS |
2220 | |
2221 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2222 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2223 | ||
f60f6b8f | 2224 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2225 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2226 | else | |
2227 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2228 | out_hdr->sadb_msg_errno = 0; | |
2229 | out_hdr->sadb_msg_seq = c->seq; | |
15e47304 | 2230 | out_hdr->sadb_msg_pid = c->portid; |
36f41f8f | 2231 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad JHS |
2232 | return 0; |
2233 | ||
2234 | } | |
2235 | ||
4c93fbb0 | 2236 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2237 | { |
07fb0f17 | 2238 | struct net *net = sock_net(sk); |
df71837d | 2239 | int err = 0; |
1da177e4 LT |
2240 | struct sadb_lifetime *lifetime; |
2241 | struct sadb_address *sa; | |
2242 | struct sadb_x_policy *pol; | |
2243 | struct xfrm_policy *xp; | |
26b15dad | 2244 | struct km_event c; |
df71837d | 2245 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2246 | |
2247 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2248 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2249 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2250 | return -EINVAL; | |
2251 | ||
2252 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2253 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2254 | return -EINVAL; | |
2255 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2256 | return -EINVAL; | |
2257 | ||
07fb0f17 | 2258 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2259 | if (xp == NULL) |
2260 | return -ENOBUFS; | |
2261 | ||
2262 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2263 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2264 | xp->priority = pol->sadb_x_policy_priority; | |
2265 | ||
d0d79c3f | 2266 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 | 2267 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
1da177e4 LT |
2268 | xp->selector.family = xp->family; |
2269 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2270 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2271 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2272 | if (xp->selector.sport) | |
8f83f23e | 2273 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2274 | |
d0d79c3f | 2275 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2276 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2277 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2278 | ||
2279 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2280 | * in both addresses. | |
2281 | */ | |
2282 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2283 | ||
2284 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2285 | if (xp->selector.dport) | |
8f83f23e | 2286 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2287 | |
ea110733 | 2288 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2289 | if (sec_ctx != NULL) { |
87536a81 | 2290 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2291 | |
2292 | if (!uctx) { | |
2293 | err = -ENOBUFS; | |
2294 | goto out; | |
2295 | } | |
2296 | ||
52a4c640 | 2297 | err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL); |
df71837d TJ |
2298 | kfree(uctx); |
2299 | ||
2300 | if (err) | |
2301 | goto out; | |
2302 | } | |
2303 | ||
1da177e4 LT |
2304 | xp->lft.soft_byte_limit = XFRM_INF; |
2305 | xp->lft.hard_byte_limit = XFRM_INF; | |
2306 | xp->lft.soft_packet_limit = XFRM_INF; | |
2307 | xp->lft.hard_packet_limit = XFRM_INF; | |
2308 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2309 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2310 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2311 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2312 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2313 | } | |
2314 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2315 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2316 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2317 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2318 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2319 | } | |
2320 | xp->xfrm_nr = 0; | |
2321 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2322 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2323 | goto out; | |
2324 | ||
1da177e4 LT |
2325 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2326 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2327 | |
2e71029e | 2328 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 2329 | |
df71837d TJ |
2330 | if (err) |
2331 | goto out; | |
1da177e4 | 2332 | |
26b15dad | 2333 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2334 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2335 | else |
f60f6b8f | 2336 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2337 | |
26b15dad | 2338 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2339 | c.portid = hdr->sadb_msg_pid; |
1da177e4 | 2340 | |
26b15dad JHS |
2341 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2342 | xfrm_pol_put(xp); | |
1da177e4 LT |
2343 | return 0; |
2344 | ||
2345 | out: | |
12a169e7 | 2346 | xp->walk.dead = 1; |
64c31b3f | 2347 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2348 | return err; |
2349 | } | |
2350 | ||
4c93fbb0 | 2351 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2352 | { |
07fb0f17 | 2353 | struct net *net = sock_net(sk); |
1da177e4 LT |
2354 | int err; |
2355 | struct sadb_address *sa; | |
2356 | struct sadb_x_policy *pol; | |
03e1ad7b | 2357 | struct xfrm_policy *xp; |
1da177e4 | 2358 | struct xfrm_selector sel; |
26b15dad | 2359 | struct km_event c; |
df71837d | 2360 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2361 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2362 | |
2363 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2364 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2365 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2366 | return -EINVAL; | |
2367 | ||
2368 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2369 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2370 | return -EINVAL; | |
2371 | ||
2372 | memset(&sel, 0, sizeof(sel)); | |
2373 | ||
d0d79c3f | 2374 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 LT |
2375 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2376 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2377 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2378 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2379 | if (sel.sport) | |
8f83f23e | 2380 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2381 | |
d0d79c3f | 2382 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2383 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2384 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2385 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2386 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2387 | if (sel.dport) | |
8f83f23e | 2388 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2389 | |
ea110733 | 2390 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2391 | if (sec_ctx != NULL) { |
87536a81 | 2392 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2393 | |
2394 | if (!uctx) | |
2395 | return -ENOMEM; | |
2396 | ||
52a4c640 | 2397 | err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL); |
df71837d | 2398 | kfree(uctx); |
df71837d TJ |
2399 | if (err) |
2400 | return err; | |
2db3e47e | 2401 | } |
161a09e7 | 2402 | |
7e652640 | 2403 | xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, 0, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b PM |
2404 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2405 | 1, &err); | |
2406 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2407 | if (xp == NULL) |
2408 | return -ENOENT; | |
2409 | ||
2e71029e | 2410 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
2411 | |
2412 | if (err) | |
c8c05a8e | 2413 | goto out; |
13fcfbb0 | 2414 | |
26b15dad | 2415 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2416 | c.portid = hdr->sadb_msg_pid; |
1839faab | 2417 | c.data.byid = 0; |
f60f6b8f | 2418 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2419 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2420 | ||
c8c05a8e | 2421 | out: |
26b15dad JHS |
2422 | xfrm_pol_put(xp); |
2423 | return err; | |
2424 | } | |
2425 | ||
4c93fbb0 | 2426 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir) |
26b15dad JHS |
2427 | { |
2428 | int err; | |
2429 | struct sk_buff *out_skb; | |
2430 | struct sadb_msg *out_hdr; | |
2431 | err = 0; | |
2432 | ||
1da177e4 LT |
2433 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2434 | if (IS_ERR(out_skb)) { | |
2435 | err = PTR_ERR(out_skb); | |
2436 | goto out; | |
2437 | } | |
55569ce2 | 2438 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
7c80eb1c JS |
2439 | if (err < 0) { |
2440 | kfree_skb(out_skb); | |
55569ce2 | 2441 | goto out; |
7c80eb1c | 2442 | } |
1da177e4 LT |
2443 | |
2444 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2445 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2446 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2447 | out_hdr->sadb_msg_satype = 0; |
2448 | out_hdr->sadb_msg_errno = 0; | |
2449 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2450 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 2451 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4 LT |
2452 | err = 0; |
2453 | ||
2454 | out: | |
1da177e4 LT |
2455 | return err; |
2456 | } | |
2457 | ||
08de61be SS |
2458 | static int pfkey_sockaddr_pair_size(sa_family_t family) |
2459 | { | |
9e8b4ed8 | 2460 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2461 | } |
2462 | ||
13c1d189 | 2463 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2464 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2465 | u16 *family) | |
2466 | { | |
5f95ac91 YH |
2467 | int af, socklen; |
2468 | ||
096f41d3 | 2469 | if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2470 | return -EINVAL; |
2471 | ||
13c1d189 | 2472 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2473 | if (!af) |
2474 | return -EINVAL; | |
2475 | ||
2476 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2477 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2478 | daddr) != af) |
08de61be | 2479 | return -EINVAL; |
08de61be | 2480 | |
5f95ac91 | 2481 | *family = af; |
08de61be SS |
2482 | return 0; |
2483 | } | |
2484 | ||
096f41d3 | 2485 | #ifdef CONFIG_NET_KEY_MIGRATE |
08de61be SS |
2486 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, |
2487 | struct xfrm_migrate *m) | |
2488 | { | |
2489 | int err; | |
2490 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2491 | int mode; |
08de61be | 2492 | |
096f41d3 HX |
2493 | if (len < sizeof(*rq1) || |
2494 | len < rq1->sadb_x_ipsecrequest_len || | |
2495 | rq1->sadb_x_ipsecrequest_len < sizeof(*rq1)) | |
08de61be SS |
2496 | return -EINVAL; |
2497 | ||
2498 | /* old endoints */ | |
13c1d189 | 2499 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
096f41d3 | 2500 | rq1->sadb_x_ipsecrequest_len - sizeof(*rq1), |
13c1d189 | 2501 | &m->old_saddr, &m->old_daddr, |
08de61be SS |
2502 | &m->old_family); |
2503 | if (err) | |
2504 | return err; | |
2505 | ||
2506 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2507 | len -= rq1->sadb_x_ipsecrequest_len; | |
2508 | ||
096f41d3 HX |
2509 | if (len <= sizeof(*rq2) || |
2510 | len < rq2->sadb_x_ipsecrequest_len || | |
2511 | rq2->sadb_x_ipsecrequest_len < sizeof(*rq2)) | |
08de61be SS |
2512 | return -EINVAL; |
2513 | ||
2514 | /* new endpoints */ | |
13c1d189 | 2515 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
096f41d3 | 2516 | rq2->sadb_x_ipsecrequest_len - sizeof(*rq2), |
13c1d189 | 2517 | &m->new_saddr, &m->new_daddr, |
08de61be SS |
2518 | &m->new_family); |
2519 | if (err) | |
2520 | return err; | |
2521 | ||
2522 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2523 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2524 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2525 | return -EINVAL; | |
2526 | ||
2527 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2528 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2529 | return -EINVAL; | |
2530 | m->mode = mode; | |
08de61be SS |
2531 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2532 | ||
2533 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2534 | rq2->sadb_x_ipsecrequest_len)); | |
2535 | } | |
2536 | ||
2537 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2538 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2539 | { |
2540 | int i, len, ret, err = -EINVAL; | |
2541 | u8 dir; | |
2542 | struct sadb_address *sa; | |
13c1d189 | 2543 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2544 | struct sadb_x_policy *pol; |
2545 | struct sadb_x_ipsecrequest *rq; | |
2546 | struct xfrm_selector sel; | |
2547 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2548 | struct xfrm_kmaddress k; |
8d549c4f | 2549 | struct net *net = sock_net(sk); |
08de61be SS |
2550 | |
2551 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2552 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2553 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2554 | err = -EINVAL; | |
2555 | goto out; | |
2556 | } | |
2557 | ||
13c1d189 | 2558 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2559 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2560 | |
2561 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2562 | err = -EINVAL; | |
2563 | goto out; | |
2564 | } | |
2565 | ||
13c1d189 AE |
2566 | if (kma) { |
2567 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2568 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2569 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2570 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2571 | &k.local, &k.remote, &k.family); | |
2572 | if (ret < 0) { | |
2573 | err = ret; | |
2574 | goto out; | |
2575 | } | |
2576 | } | |
2577 | ||
08de61be SS |
2578 | dir = pol->sadb_x_policy_dir - 1; |
2579 | memset(&sel, 0, sizeof(sel)); | |
2580 | ||
2581 | /* set source address info of selector */ | |
2582 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2583 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2584 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2585 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2586 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2587 | if (sel.sport) | |
582ee43d | 2588 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2589 | |
2590 | /* set destination address info of selector */ | |
47162c0b | 2591 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
08de61be SS |
2592 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2593 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2594 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2595 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2596 | if (sel.dport) | |
582ee43d | 2597 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2598 | |
2599 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2600 | ||
2601 | /* extract ipsecrequests */ | |
2602 | i = 0; | |
2603 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2604 | ||
2605 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2606 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2607 | if (ret < 0) { | |
2608 | err = ret; | |
2609 | goto out; | |
2610 | } else { | |
2611 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2612 | len -= ret; | |
2613 | i++; | |
2614 | } | |
2615 | } | |
2616 | ||
2617 | if (!i || len > 0) { | |
2618 | err = -EINVAL; | |
2619 | goto out; | |
2620 | } | |
2621 | ||
13c1d189 | 2622 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
4ab47d47 | 2623 | kma ? &k : NULL, net, NULL); |
08de61be SS |
2624 | |
2625 | out: | |
2626 | return err; | |
2627 | } | |
2628 | #else | |
2629 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
7f6daa63 | 2630 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2631 | { |
2632 | return -ENOPROTOOPT; | |
2633 | } | |
2634 | #endif | |
2635 | ||
2636 | ||
4c93fbb0 | 2637 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2638 | { |
07fb0f17 | 2639 | struct net *net = sock_net(sk); |
77d8d7a6 | 2640 | unsigned int dir; |
215a2dd3 | 2641 | int err = 0, delete; |
1da177e4 LT |
2642 | struct sadb_x_policy *pol; |
2643 | struct xfrm_policy *xp; | |
26b15dad | 2644 | struct km_event c; |
1da177e4 LT |
2645 | |
2646 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2647 | return -EINVAL; | |
2648 | ||
77d8d7a6 HX |
2649 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2650 | if (dir >= XFRM_POLICY_MAX) | |
2651 | return -EINVAL; | |
2652 | ||
215a2dd3 | 2653 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
7e652640 | 2654 | xp = xfrm_policy_byid(net, DUMMY_MARK, 0, XFRM_POLICY_TYPE_MAIN, |
bd55775c | 2655 | dir, pol->sadb_x_policy_id, delete, &err); |
1da177e4 LT |
2656 | if (xp == NULL) |
2657 | return -ENOENT; | |
2658 | ||
215a2dd3 | 2659 | if (delete) { |
2e71029e | 2660 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
1da177e4 | 2661 | |
215a2dd3 EP |
2662 | if (err) |
2663 | goto out; | |
2664 | c.seq = hdr->sadb_msg_seq; | |
15e47304 | 2665 | c.portid = hdr->sadb_msg_pid; |
bf08867f | 2666 | c.data.byid = 1; |
f60f6b8f | 2667 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2668 | km_policy_notify(xp, dir, &c); |
26b15dad | 2669 | } else { |
77d8d7a6 | 2670 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2671 | } |
1da177e4 | 2672 | |
215a2dd3 | 2673 | out: |
1da177e4 LT |
2674 | xfrm_pol_put(xp); |
2675 | return err; | |
2676 | } | |
2677 | ||
2678 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2679 | { | |
83321d6b | 2680 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2681 | struct sk_buff *out_skb; |
2682 | struct sadb_msg *out_hdr; | |
55569ce2 | 2683 | int err; |
1da177e4 | 2684 | |
83321d6b TT |
2685 | if (!pfkey_can_dump(&pfk->sk)) |
2686 | return -ENOBUFS; | |
2687 | ||
1da177e4 LT |
2688 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2689 | if (IS_ERR(out_skb)) | |
2690 | return PTR_ERR(out_skb); | |
2691 | ||
55569ce2 | 2692 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
7c80eb1c JS |
2693 | if (err < 0) { |
2694 | kfree_skb(out_skb); | |
55569ce2 | 2695 | return err; |
7c80eb1c | 2696 | } |
1da177e4 LT |
2697 | |
2698 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2699 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2700 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2701 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2702 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2703 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 2704 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
2705 | |
2706 | if (pfk->dump.skb) | |
36f41f8f | 2707 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 2708 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
2709 | pfk->dump.skb = out_skb; |
2710 | ||
1da177e4 LT |
2711 | return 0; |
2712 | } | |
2713 | ||
83321d6b TT |
2714 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2715 | { | |
07fb0f17 AD |
2716 | struct net *net = sock_net(&pfk->sk); |
2717 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); | |
83321d6b TT |
2718 | } |
2719 | ||
2720 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2721 | { | |
283bc9f3 FD |
2722 | struct net *net = sock_net((struct sock *)pfk); |
2723 | ||
2724 | xfrm_policy_walk_done(&pfk->dump.u.policy, net); | |
83321d6b TT |
2725 | } |
2726 | ||
4c93fbb0 | 2727 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2728 | { |
83321d6b | 2729 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2730 | |
89e357d8 YS |
2731 | mutex_lock(&pfk->dump_lock); |
2732 | if (pfk->dump.dump != NULL) { | |
2733 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 2734 | return -EBUSY; |
89e357d8 | 2735 | } |
1da177e4 | 2736 | |
83321d6b | 2737 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 2738 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
2739 | pfk->dump.dump = pfkey_dump_sp; |
2740 | pfk->dump.done = pfkey_dump_sp_done; | |
2741 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
89e357d8 | 2742 | mutex_unlock(&pfk->dump_lock); |
83321d6b TT |
2743 | |
2744 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2745 | } |
2746 | ||
214e005b | 2747 | static int key_notify_policy_flush(const struct km_event *c) |
1da177e4 LT |
2748 | { |
2749 | struct sk_buff *skb_out; | |
26b15dad | 2750 | struct sadb_msg *hdr; |
1da177e4 | 2751 | |
26b15dad | 2752 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2753 | if (!skb_out) |
2754 | return -ENOBUFS; | |
4df864c1 | 2755 | hdr = skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2756 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad | 2757 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 2758 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
2759 | hdr->sadb_msg_version = PF_KEY_V2; |
2760 | hdr->sadb_msg_errno = (uint8_t) 0; | |
85dfb745 | 2761 | hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; |
26b15dad | 2762 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
a5cc68f3 | 2763 | hdr->sadb_msg_reserved = 0; |
36f41f8f | 2764 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad | 2765 | return 0; |
1da177e4 | 2766 | |
26b15dad JHS |
2767 | } |
2768 | ||
4c93fbb0 | 2769 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
26b15dad | 2770 | { |
07fb0f17 | 2771 | struct net *net = sock_net(sk); |
26b15dad | 2772 | struct km_event c; |
8be987d7 | 2773 | int err, err2; |
1da177e4 | 2774 | |
2e71029e | 2775 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true); |
8be987d7 | 2776 | err2 = unicast_flush_resp(sk, hdr); |
2f1eb65f JHS |
2777 | if (err || err2) { |
2778 | if (err == -ESRCH) /* empty table - old silent behavior */ | |
2779 | return 0; | |
2780 | return err; | |
2781 | } | |
8be987d7 | 2782 | |
f7b6983f | 2783 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2784 | c.event = XFRM_MSG_FLUSHPOLICY; |
15e47304 | 2785 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 2786 | c.seq = hdr->sadb_msg_seq; |
07fb0f17 | 2787 | c.net = net; |
26b15dad | 2788 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
2789 | |
2790 | return 0; | |
2791 | } | |
2792 | ||
2793 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2794 | const struct sadb_msg *hdr, void * const *ext_hdrs); |
8603b955 | 2795 | static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
1da177e4 LT |
2796 | [SADB_RESERVED] = pfkey_reserved, |
2797 | [SADB_GETSPI] = pfkey_getspi, | |
2798 | [SADB_UPDATE] = pfkey_add, | |
2799 | [SADB_ADD] = pfkey_add, | |
2800 | [SADB_DELETE] = pfkey_delete, | |
2801 | [SADB_GET] = pfkey_get, | |
2802 | [SADB_ACQUIRE] = pfkey_acquire, | |
2803 | [SADB_REGISTER] = pfkey_register, | |
2804 | [SADB_EXPIRE] = NULL, | |
2805 | [SADB_FLUSH] = pfkey_flush, | |
2806 | [SADB_DUMP] = pfkey_dump, | |
2807 | [SADB_X_PROMISC] = pfkey_promisc, | |
2808 | [SADB_X_PCHANGE] = NULL, | |
2809 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2810 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2811 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2812 | [SADB_X_SPDGET] = pfkey_spdget, | |
2813 | [SADB_X_SPDACQUIRE] = NULL, | |
2814 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2815 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2816 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2817 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2818 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2819 | }; |
2820 | ||
4c93fbb0 | 2821 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr) |
1da177e4 LT |
2822 | { |
2823 | void *ext_hdrs[SADB_EXT_MAX]; | |
2824 | int err; | |
2825 | ||
36f41f8f | 2826 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, |
07fb0f17 | 2827 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
1da177e4 LT |
2828 | |
2829 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2830 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2831 | if (!err) { | |
2832 | err = -EOPNOTSUPP; | |
2833 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2834 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2835 | } | |
2836 | return err; | |
2837 | } | |
2838 | ||
2839 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2840 | { | |
2841 | struct sadb_msg *hdr = NULL; | |
2842 | ||
2843 | if (skb->len < sizeof(*hdr)) { | |
2844 | *errp = -EMSGSIZE; | |
2845 | } else { | |
2846 | hdr = (struct sadb_msg *) skb->data; | |
2847 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2848 | hdr->sadb_msg_reserved != 0 || | |
2849 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2850 | hdr->sadb_msg_type > SADB_MAX)) { | |
2851 | hdr = NULL; | |
2852 | *errp = -EINVAL; | |
2853 | } else if (hdr->sadb_msg_len != (skb->len / | |
2854 | sizeof(uint64_t)) || | |
2855 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2856 | sizeof(uint64_t))) { | |
2857 | hdr = NULL; | |
2858 | *errp = -EMSGSIZE; | |
2859 | } else { | |
2860 | *errp = 0; | |
2861 | } | |
2862 | } | |
2863 | return hdr; | |
2864 | } | |
2865 | ||
4c93fbb0 DM |
2866 | static inline int aalg_tmpl_set(const struct xfrm_tmpl *t, |
2867 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2868 | { |
f398035f HX |
2869 | unsigned int id = d->desc.sadb_alg_id; |
2870 | ||
2871 | if (id >= sizeof(t->aalgos) * 8) | |
2872 | return 0; | |
2873 | ||
2874 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2875 | } |
2876 | ||
4c93fbb0 DM |
2877 | static inline int ealg_tmpl_set(const struct xfrm_tmpl *t, |
2878 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2879 | { |
f398035f HX |
2880 | unsigned int id = d->desc.sadb_alg_id; |
2881 | ||
2882 | if (id >= sizeof(t->ealgos) * 8) | |
2883 | return 0; | |
2884 | ||
2885 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2886 | } |
2887 | ||
4c93fbb0 | 2888 | static int count_ah_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2889 | { |
2890 | int i, sz = 0; | |
2891 | ||
2892 | for (i = 0; ; i++) { | |
4c93fbb0 | 2893 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2894 | if (!aalg) |
2895 | break; | |
7e50f84c JK |
2896 | if (!aalg->pfkey_supported) |
2897 | continue; | |
1da177e4 LT |
2898 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2899 | sz += sizeof(struct sadb_comb); | |
2900 | } | |
2901 | return sz + sizeof(struct sadb_prop); | |
2902 | } | |
2903 | ||
4c93fbb0 | 2904 | static int count_esp_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2905 | { |
2906 | int i, k, sz = 0; | |
2907 | ||
2908 | for (i = 0; ; i++) { | |
4c93fbb0 | 2909 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2910 | if (!ealg) |
2911 | break; | |
8ff24541 | 2912 | |
7e50f84c JK |
2913 | if (!ealg->pfkey_supported) |
2914 | continue; | |
2915 | ||
1da177e4 LT |
2916 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2917 | continue; | |
8ff24541 | 2918 | |
1da177e4 | 2919 | for (k = 1; ; k++) { |
4c93fbb0 | 2920 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2921 | if (!aalg) |
2922 | break; | |
8ff24541 | 2923 | |
7e50f84c JK |
2924 | if (!aalg->pfkey_supported) |
2925 | continue; | |
2926 | ||
1da177e4 LT |
2927 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2928 | sz += sizeof(struct sadb_comb); | |
2929 | } | |
2930 | } | |
2931 | return sz + sizeof(struct sadb_prop); | |
2932 | } | |
2933 | ||
4c93fbb0 | 2934 | static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2935 | { |
2936 | struct sadb_prop *p; | |
2937 | int i; | |
2938 | ||
4df864c1 | 2939 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2940 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2941 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2942 | p->sadb_prop_replay = 32; | |
2943 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2944 | ||
2945 | for (i = 0; ; i++) { | |
4c93fbb0 | 2946 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2947 | if (!aalg) |
2948 | break; | |
2949 | ||
7e50f84c JK |
2950 | if (!aalg->pfkey_supported) |
2951 | continue; | |
2952 | ||
1da177e4 LT |
2953 | if (aalg_tmpl_set(t, aalg) && aalg->available) { |
2954 | struct sadb_comb *c; | |
b080db58 | 2955 | c = skb_put_zero(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
2956 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; |
2957 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2958 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2959 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2960 | c->sadb_comb_hard_addtime = 24*60*60; | |
2961 | c->sadb_comb_soft_addtime = 20*60*60; | |
2962 | c->sadb_comb_hard_usetime = 8*60*60; | |
2963 | c->sadb_comb_soft_usetime = 7*60*60; | |
2964 | } | |
2965 | } | |
2966 | } | |
2967 | ||
4c93fbb0 | 2968 | static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2969 | { |
2970 | struct sadb_prop *p; | |
2971 | int i, k; | |
2972 | ||
4df864c1 | 2973 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2974 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2975 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2976 | p->sadb_prop_replay = 32; | |
2977 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2978 | ||
2979 | for (i=0; ; i++) { | |
4c93fbb0 | 2980 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2981 | if (!ealg) |
2982 | break; | |
8ff24541 | 2983 | |
7e50f84c JK |
2984 | if (!ealg->pfkey_supported) |
2985 | continue; | |
2986 | ||
1da177e4 LT |
2987 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2988 | continue; | |
8ff24541 | 2989 | |
1da177e4 LT |
2990 | for (k = 1; ; k++) { |
2991 | struct sadb_comb *c; | |
4c93fbb0 | 2992 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2993 | if (!aalg) |
2994 | break; | |
7e50f84c JK |
2995 | if (!aalg->pfkey_supported) |
2996 | continue; | |
1da177e4 LT |
2997 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) |
2998 | continue; | |
4df864c1 | 2999 | c = skb_put(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
3000 | memset(c, 0, sizeof(*c)); |
3001 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
3002 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
3003 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
3004 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
3005 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
3006 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
3007 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
3008 | c->sadb_comb_hard_addtime = 24*60*60; | |
3009 | c->sadb_comb_soft_addtime = 20*60*60; | |
3010 | c->sadb_comb_hard_usetime = 8*60*60; | |
3011 | c->sadb_comb_soft_usetime = 7*60*60; | |
3012 | } | |
3013 | } | |
3014 | } | |
3015 | ||
214e005b | 3016 | static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c) |
26b15dad JHS |
3017 | { |
3018 | return 0; | |
3019 | } | |
3020 | ||
214e005b | 3021 | static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
3022 | { |
3023 | struct sk_buff *out_skb; | |
3024 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
3025 | int hard; |
3026 | int hsc; | |
3027 | ||
bf08867f | 3028 | hard = c->data.hard; |
26b15dad JHS |
3029 | if (hard) |
3030 | hsc = 2; | |
3031 | else | |
3032 | hsc = 1; | |
1da177e4 | 3033 | |
050f009e | 3034 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
3035 | if (IS_ERR(out_skb)) |
3036 | return PTR_ERR(out_skb); | |
3037 | ||
3038 | out_hdr = (struct sadb_msg *) out_skb->data; | |
3039 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
3040 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
3041 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3042 | out_hdr->sadb_msg_errno = 0; | |
3043 | out_hdr->sadb_msg_reserved = 0; | |
3044 | out_hdr->sadb_msg_seq = 0; | |
3045 | out_hdr->sadb_msg_pid = 0; | |
3046 | ||
36f41f8f ED |
3047 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3048 | xs_net(x)); | |
1da177e4 LT |
3049 | return 0; |
3050 | } | |
3051 | ||
214e005b | 3052 | static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 3053 | { |
07fb0f17 | 3054 | struct net *net = x ? xs_net(x) : c->net; |
3fa87a32 AD |
3055 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3056 | ||
3057 | if (atomic_read(&net_pfkey->socks_nr) == 0) | |
99c6f60e JHS |
3058 | return 0; |
3059 | ||
26b15dad | 3060 | switch (c->event) { |
f60f6b8f | 3061 | case XFRM_MSG_EXPIRE: |
26b15dad | 3062 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
3063 | case XFRM_MSG_DELSA: |
3064 | case XFRM_MSG_NEWSA: | |
3065 | case XFRM_MSG_UPDSA: | |
26b15dad | 3066 | return key_notify_sa(x, c); |
f60f6b8f | 3067 | case XFRM_MSG_FLUSHSA: |
26b15dad | 3068 | return key_notify_sa_flush(c); |
d51d081d JHS |
3069 | case XFRM_MSG_NEWAE: /* not yet supported */ |
3070 | break; | |
26b15dad | 3071 | default: |
207024b9 | 3072 | pr_err("pfkey: Unknown SA event %d\n", c->event); |
26b15dad JHS |
3073 | break; |
3074 | } | |
3075 | ||
3076 | return 0; | |
3077 | } | |
3078 | ||
214e005b | 3079 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 3080 | { |
f7b6983f MN |
3081 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
3082 | return 0; | |
3083 | ||
26b15dad | 3084 | switch (c->event) { |
f60f6b8f | 3085 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 3086 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
3087 | case XFRM_MSG_DELPOLICY: |
3088 | case XFRM_MSG_NEWPOLICY: | |
3089 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 3090 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 3091 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
3092 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
3093 | break; | |
26b15dad JHS |
3094 | return key_notify_policy_flush(c); |
3095 | default: | |
207024b9 | 3096 | pr_err("pfkey: Unknown policy event %d\n", c->event); |
26b15dad JHS |
3097 | break; |
3098 | } | |
3099 | ||
3100 | return 0; | |
3101 | } | |
3102 | ||
1da177e4 LT |
3103 | static u32 get_acqseq(void) |
3104 | { | |
3105 | u32 res; | |
28aecb9d | 3106 | static atomic_t acqseq; |
1da177e4 | 3107 | |
28aecb9d ED |
3108 | do { |
3109 | res = atomic_inc_return(&acqseq); | |
3110 | } while (!res); | |
1da177e4 LT |
3111 | return res; |
3112 | } | |
3113 | ||
0f24558e HG |
3114 | static bool pfkey_is_alive(const struct km_event *c) |
3115 | { | |
3116 | struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id); | |
3117 | struct sock *sk; | |
3118 | bool is_alive = false; | |
3119 | ||
3120 | rcu_read_lock(); | |
3121 | sk_for_each_rcu(sk, &net_pfkey->table) { | |
3122 | if (pfkey_sk(sk)->registered) { | |
3123 | is_alive = true; | |
3124 | break; | |
3125 | } | |
3126 | } | |
3127 | rcu_read_unlock(); | |
3128 | ||
3129 | return is_alive; | |
3130 | } | |
3131 | ||
65e0736b | 3132 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp) |
1da177e4 LT |
3133 | { |
3134 | struct sk_buff *skb; | |
3135 | struct sadb_msg *hdr; | |
3136 | struct sadb_address *addr; | |
3137 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3138 | int sockaddr_size; |
3139 | int size; | |
4e2ba18e VY |
3140 | struct sadb_x_sec_ctx *sec_ctx; |
3141 | struct xfrm_sec_ctx *xfrm_ctx; | |
3142 | int ctx_size = 0; | |
8ff24541 | 3143 | |
1da177e4 LT |
3144 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3145 | if (!sockaddr_size) | |
3146 | return -EINVAL; | |
3147 | ||
3148 | size = sizeof(struct sadb_msg) + | |
3149 | (sizeof(struct sadb_address) * 2) + | |
3150 | (sockaddr_size * 2) + | |
3151 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3152 | |
1da177e4 LT |
3153 | if (x->id.proto == IPPROTO_AH) |
3154 | size += count_ah_combs(t); | |
3155 | else if (x->id.proto == IPPROTO_ESP) | |
3156 | size += count_esp_combs(t); | |
3157 | ||
4e2ba18e VY |
3158 | if ((xfrm_ctx = x->security)) { |
3159 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3160 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3161 | } | |
3162 | ||
1da177e4 LT |
3163 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3164 | if (skb == NULL) | |
3165 | return -ENOMEM; | |
8ff24541 | 3166 | |
4df864c1 | 3167 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3168 | hdr->sadb_msg_version = PF_KEY_V2; |
3169 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3170 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3171 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3172 | hdr->sadb_msg_errno = 0; | |
3173 | hdr->sadb_msg_reserved = 0; | |
3174 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3175 | hdr->sadb_msg_pid = 0; | |
3176 | ||
3177 | /* src address */ | |
4df864c1 | 3178 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3179 | addr->sadb_address_len = |
1da177e4 LT |
3180 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3181 | sizeof(uint64_t); | |
3182 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3183 | addr->sadb_address_proto = 0; | |
3184 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3185 | addr->sadb_address_prefixlen = |
3186 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3187 | (struct sockaddr *) (addr + 1), | |
3188 | x->props.family); | |
3189 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3190 | BUG(); |
8ff24541 | 3191 | |
1da177e4 | 3192 | /* dst address */ |
4df864c1 | 3193 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
3194 | addr->sadb_address_len = |
3195 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3196 | sizeof(uint64_t); | |
3197 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3198 | addr->sadb_address_proto = 0; | |
3199 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3200 | addr->sadb_address_prefixlen = |
3201 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3202 | (struct sockaddr *) (addr + 1), | |
3203 | x->props.family); | |
3204 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3205 | BUG(); |
3206 | ||
4df864c1 | 3207 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
3208 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
3209 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3210 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
65e0736b | 3211 | pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1; |
ff862a46 | 3212 | pol->sadb_x_policy_reserved = 0; |
1da177e4 | 3213 | pol->sadb_x_policy_id = xp->index; |
ff862a46 | 3214 | pol->sadb_x_policy_priority = xp->priority; |
1da177e4 LT |
3215 | |
3216 | /* Set sadb_comb's. */ | |
3217 | if (x->id.proto == IPPROTO_AH) | |
3218 | dump_ah_combs(skb, t); | |
3219 | else if (x->id.proto == IPPROTO_ESP) | |
3220 | dump_esp_combs(skb, t); | |
3221 | ||
4e2ba18e VY |
3222 | /* security context */ |
3223 | if (xfrm_ctx) { | |
4df864c1 JB |
3224 | sec_ctx = skb_put(skb, |
3225 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
4e2ba18e VY |
3226 | sec_ctx->sadb_x_sec_len = |
3227 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3228 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3229 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3230 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3231 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3232 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3233 | xfrm_ctx->ctx_len); | |
3234 | } | |
3235 | ||
36f41f8f ED |
3236 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3237 | xs_net(x)); | |
1da177e4 LT |
3238 | } |
3239 | ||
cb969f07 | 3240 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3241 | u8 *data, int len, int *dir) |
1da177e4 | 3242 | { |
07fb0f17 | 3243 | struct net *net = sock_net(sk); |
1da177e4 LT |
3244 | struct xfrm_policy *xp; |
3245 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3246 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3247 | |
cb969f07 | 3248 | switch (sk->sk_family) { |
1da177e4 LT |
3249 | case AF_INET: |
3250 | if (opt != IP_IPSEC_POLICY) { | |
3251 | *dir = -EOPNOTSUPP; | |
3252 | return NULL; | |
3253 | } | |
3254 | break; | |
dfd56b8b | 3255 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
3256 | case AF_INET6: |
3257 | if (opt != IPV6_IPSEC_POLICY) { | |
3258 | *dir = -EOPNOTSUPP; | |
3259 | return NULL; | |
3260 | } | |
3261 | break; | |
3262 | #endif | |
3263 | default: | |
3264 | *dir = -EINVAL; | |
3265 | return NULL; | |
3266 | } | |
3267 | ||
3268 | *dir = -EINVAL; | |
3269 | ||
3270 | if (len < sizeof(struct sadb_x_policy) || | |
3271 | pol->sadb_x_policy_len*8 > len || | |
3272 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3273 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3274 | return NULL; | |
3275 | ||
07fb0f17 | 3276 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
3277 | if (xp == NULL) { |
3278 | *dir = -ENOBUFS; | |
3279 | return NULL; | |
3280 | } | |
3281 | ||
3282 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3283 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3284 | ||
3285 | xp->lft.soft_byte_limit = XFRM_INF; | |
3286 | xp->lft.hard_byte_limit = XFRM_INF; | |
3287 | xp->lft.soft_packet_limit = XFRM_INF; | |
3288 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3289 | xp->family = sk->sk_family; |
1da177e4 LT |
3290 | |
3291 | xp->xfrm_nr = 0; | |
3292 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3293 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3294 | goto out; | |
3295 | ||
df71837d TJ |
3296 | /* security context too */ |
3297 | if (len >= (pol->sadb_x_policy_len*8 + | |
3298 | sizeof(struct sadb_x_sec_ctx))) { | |
3299 | char *p = (char *)pol; | |
3300 | struct xfrm_user_sec_ctx *uctx; | |
3301 | ||
3302 | p += pol->sadb_x_policy_len*8; | |
3303 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3304 | if (len < pol->sadb_x_policy_len*8 + | |
d90c9024 | 3305 | sec_ctx->sadb_x_sec_len*8) { |
cb969f07 | 3306 | *dir = -EINVAL; |
df71837d | 3307 | goto out; |
cb969f07 | 3308 | } |
df71837d TJ |
3309 | if ((*dir = verify_sec_ctx_len(p))) |
3310 | goto out; | |
87536a81 | 3311 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC); |
52a4c640 | 3312 | *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC); |
df71837d TJ |
3313 | kfree(uctx); |
3314 | ||
3315 | if (*dir) | |
3316 | goto out; | |
3317 | } | |
3318 | ||
1da177e4 LT |
3319 | *dir = pol->sadb_x_policy_dir-1; |
3320 | return xp; | |
3321 | ||
3322 | out: | |
70e90679 | 3323 | xp->walk.dead = 1; |
64c31b3f | 3324 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3325 | return NULL; |
3326 | } | |
3327 | ||
5d36b180 | 3328 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3329 | { |
3330 | struct sk_buff *skb; | |
3331 | struct sadb_msg *hdr; | |
3332 | struct sadb_sa *sa; | |
3333 | struct sadb_address *addr; | |
3334 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3335 | int sockaddr_size; |
3336 | int size; | |
3337 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3338 | struct xfrm_encap_tmpl *natt = NULL; | |
3339 | ||
3340 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3341 | if (!sockaddr_size) | |
3342 | return -EINVAL; | |
3343 | ||
3344 | if (!satype) | |
3345 | return -EINVAL; | |
3346 | ||
3347 | if (!x->encap) | |
3348 | return -EINVAL; | |
3349 | ||
3350 | natt = x->encap; | |
3351 | ||
3352 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3353 | * | |
3354 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3355 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3356 | */ | |
8ff24541 | 3357 | |
1da177e4 LT |
3358 | size = sizeof(struct sadb_msg) + |
3359 | sizeof(struct sadb_sa) + | |
3360 | (sizeof(struct sadb_address) * 2) + | |
3361 | (sockaddr_size * 2) + | |
3362 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3363 | |
1da177e4 LT |
3364 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3365 | if (skb == NULL) | |
3366 | return -ENOMEM; | |
8ff24541 | 3367 | |
4df864c1 | 3368 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3369 | hdr->sadb_msg_version = PF_KEY_V2; |
3370 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3371 | hdr->sadb_msg_satype = satype; | |
3372 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3373 | hdr->sadb_msg_errno = 0; | |
3374 | hdr->sadb_msg_reserved = 0; | |
3375 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3376 | hdr->sadb_msg_pid = 0; | |
3377 | ||
3378 | /* SA */ | |
4df864c1 | 3379 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
3380 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
3381 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3382 | sa->sadb_sa_spi = x->id.spi; | |
3383 | sa->sadb_sa_replay = 0; | |
3384 | sa->sadb_sa_state = 0; | |
3385 | sa->sadb_sa_auth = 0; | |
3386 | sa->sadb_sa_encrypt = 0; | |
3387 | sa->sadb_sa_flags = 0; | |
3388 | ||
3389 | /* ADDRESS_SRC (old addr) */ | |
4df864c1 | 3390 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3391 | addr->sadb_address_len = |
1da177e4 LT |
3392 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3393 | sizeof(uint64_t); | |
3394 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3395 | addr->sadb_address_proto = 0; | |
3396 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3397 | addr->sadb_address_prefixlen = |
3398 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3399 | (struct sockaddr *) (addr + 1), | |
3400 | x->props.family); | |
3401 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3402 | BUG(); |
3403 | ||
3404 | /* NAT_T_SPORT (old port) */ | |
4df864c1 | 3405 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3406 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3407 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3408 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3409 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3410 | ||
3411 | /* ADDRESS_DST (new addr) */ | |
4df864c1 | 3412 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3413 | addr->sadb_address_len = |
1da177e4 LT |
3414 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3415 | sizeof(uint64_t); | |
3416 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3417 | addr->sadb_address_proto = 0; | |
3418 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3419 | addr->sadb_address_prefixlen = |
3420 | pfkey_sockaddr_fill(ipaddr, 0, | |
3421 | (struct sockaddr *) (addr + 1), | |
3422 | x->props.family); | |
3423 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3424 | BUG(); |
3425 | ||
3426 | /* NAT_T_DPORT (new port) */ | |
4df864c1 | 3427 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3428 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3429 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3430 | n_port->sadb_x_nat_t_port_port = sport; | |
3431 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3432 | ||
36f41f8f ED |
3433 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3434 | xs_net(x)); | |
1da177e4 LT |
3435 | } |
3436 | ||
08de61be SS |
3437 | #ifdef CONFIG_NET_KEY_MIGRATE |
3438 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
183cad12 | 3439 | const struct xfrm_selector *sel) |
08de61be SS |
3440 | { |
3441 | struct sadb_address *addr; | |
4df864c1 | 3442 | addr = skb_put(skb, sizeof(struct sadb_address) + sasize); |
08de61be SS |
3443 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; |
3444 | addr->sadb_address_exttype = type; | |
3445 | addr->sadb_address_proto = sel->proto; | |
3446 | addr->sadb_address_reserved = 0; | |
3447 | ||
3448 | switch (type) { | |
3449 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3450 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3451 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3452 | (struct sockaddr *)(addr + 1), | |
3453 | sel->family); | |
08de61be SS |
3454 | break; |
3455 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3456 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3457 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3458 | (struct sockaddr *)(addr + 1), | |
3459 | sel->family); | |
08de61be SS |
3460 | break; |
3461 | default: | |
3462 | return -EINVAL; | |
3463 | } | |
3464 | ||
3465 | return 0; | |
3466 | } | |
3467 | ||
13c1d189 | 3468 | |
183cad12 | 3469 | static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k) |
13c1d189 AE |
3470 | { |
3471 | struct sadb_x_kmaddress *kma; | |
3472 | u8 *sa; | |
3473 | int family = k->family; | |
3474 | int socklen = pfkey_sockaddr_len(family); | |
3475 | int size_req; | |
3476 | ||
3477 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3478 | pfkey_sockaddr_pair_size(family)); | |
3479 | ||
b080db58 | 3480 | kma = skb_put_zero(skb, size_req); |
13c1d189 AE |
3481 | kma->sadb_x_kmaddress_len = size_req / 8; |
3482 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3483 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3484 | ||
3485 | sa = (u8 *)(kma + 1); | |
3486 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3487 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3488 | return -EINVAL; | |
3489 | ||
3490 | return 0; | |
3491 | } | |
3492 | ||
08de61be SS |
3493 | static int set_ipsecrequest(struct sk_buff *skb, |
3494 | uint8_t proto, uint8_t mode, int level, | |
3495 | uint32_t reqid, uint8_t family, | |
183cad12 | 3496 | const xfrm_address_t *src, const xfrm_address_t *dst) |
08de61be SS |
3497 | { |
3498 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3499 | u8 *sa; |
3500 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3501 | int size_req; |
3502 | ||
3503 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3504 | pfkey_sockaddr_pair_size(family); | |
3505 | ||
b080db58 | 3506 | rq = skb_put_zero(skb, size_req); |
08de61be SS |
3507 | rq->sadb_x_ipsecrequest_len = size_req; |
3508 | rq->sadb_x_ipsecrequest_proto = proto; | |
3509 | rq->sadb_x_ipsecrequest_mode = mode; | |
3510 | rq->sadb_x_ipsecrequest_level = level; | |
3511 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3512 | ||
e5b56652 YH |
3513 | sa = (u8 *) (rq + 1); |
3514 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3515 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3516 | return -EINVAL; |
08de61be SS |
3517 | |
3518 | return 0; | |
3519 | } | |
3520 | #endif | |
3521 | ||
3522 | #ifdef CONFIG_NET_KEY_MIGRATE | |
183cad12 DM |
3523 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3524 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3525 | const struct xfrm_kmaddress *k, |
3526 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3527 | { |
3528 | int i; | |
3529 | int sasize_sel; | |
3530 | int size = 0; | |
3531 | int size_pol = 0; | |
3532 | struct sk_buff *skb; | |
3533 | struct sadb_msg *hdr; | |
3534 | struct sadb_x_policy *pol; | |
183cad12 | 3535 | const struct xfrm_migrate *mp; |
08de61be SS |
3536 | |
3537 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3538 | return 0; | |
3539 | ||
3540 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3541 | return -EINVAL; | |
3542 | ||
13c1d189 AE |
3543 | if (k != NULL) { |
3544 | /* addresses for KM */ | |
3545 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3546 | pfkey_sockaddr_pair_size(k->family)); | |
3547 | } | |
3548 | ||
08de61be SS |
3549 | /* selector */ |
3550 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3551 | if (!sasize_sel) | |
3552 | return -EINVAL; | |
3553 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3554 | ||
3555 | /* policy info */ | |
3556 | size_pol += sizeof(struct sadb_x_policy); | |
3557 | ||
3558 | /* ipsecrequests */ | |
3559 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3560 | /* old locator pair */ | |
3561 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3562 | pfkey_sockaddr_pair_size(mp->old_family); | |
3563 | /* new locator pair */ | |
3564 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3565 | pfkey_sockaddr_pair_size(mp->new_family); | |
3566 | } | |
3567 | ||
3568 | size += sizeof(struct sadb_msg) + size_pol; | |
3569 | ||
3570 | /* alloc buffer */ | |
3571 | skb = alloc_skb(size, GFP_ATOMIC); | |
3572 | if (skb == NULL) | |
3573 | return -ENOMEM; | |
3574 | ||
4df864c1 | 3575 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
08de61be SS |
3576 | hdr->sadb_msg_version = PF_KEY_V2; |
3577 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3578 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3579 | hdr->sadb_msg_len = size / 8; | |
3580 | hdr->sadb_msg_errno = 0; | |
3581 | hdr->sadb_msg_reserved = 0; | |
3582 | hdr->sadb_msg_seq = 0; | |
3583 | hdr->sadb_msg_pid = 0; | |
3584 | ||
13c1d189 AE |
3585 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3586 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
89eb06f1 | 3587 | goto err; |
13c1d189 | 3588 | |
08de61be SS |
3589 | /* selector src */ |
3590 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3591 | ||
3592 | /* selector dst */ | |
3593 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3594 | ||
3595 | /* policy information */ | |
4df864c1 | 3596 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
08de61be SS |
3597 | pol->sadb_x_policy_len = size_pol / 8; |
3598 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3599 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3600 | pol->sadb_x_policy_dir = dir + 1; | |
ff862a46 | 3601 | pol->sadb_x_policy_reserved = 0; |
08de61be SS |
3602 | pol->sadb_x_policy_id = 0; |
3603 | pol->sadb_x_policy_priority = 0; | |
3604 | ||
3605 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3606 | /* old ipsecrequest */ | |
55569ce2 KM |
3607 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3608 | if (mode < 0) | |
d4782c32 | 3609 | goto err; |
55569ce2 | 3610 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3611 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3612 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3613 | &mp->old_saddr, &mp->old_daddr) < 0) |
3614 | goto err; | |
08de61be SS |
3615 | |
3616 | /* new ipsecrequest */ | |
55569ce2 | 3617 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3618 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3619 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3620 | &mp->new_saddr, &mp->new_daddr) < 0) |
3621 | goto err; | |
08de61be SS |
3622 | } |
3623 | ||
3624 | /* broadcast migrate message to sockets */ | |
36f41f8f | 3625 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61be SS |
3626 | |
3627 | return 0; | |
d4782c32 PM |
3628 | |
3629 | err: | |
3630 | kfree_skb(skb); | |
3631 | return -EINVAL; | |
08de61be SS |
3632 | } |
3633 | #else | |
183cad12 DM |
3634 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3635 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3636 | const struct xfrm_kmaddress *k, |
3637 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3638 | { |
3639 | return -ENOPROTOOPT; | |
3640 | } | |
3641 | #endif | |
3642 | ||
1b784140 | 3643 | static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
1da177e4 LT |
3644 | { |
3645 | struct sock *sk = sock->sk; | |
3646 | struct sk_buff *skb = NULL; | |
3647 | struct sadb_msg *hdr = NULL; | |
3648 | int err; | |
283bc9f3 | 3649 | struct net *net = sock_net(sk); |
1da177e4 LT |
3650 | |
3651 | err = -EOPNOTSUPP; | |
3652 | if (msg->msg_flags & MSG_OOB) | |
3653 | goto out; | |
3654 | ||
3655 | err = -EMSGSIZE; | |
95c96174 | 3656 | if ((unsigned int)len > sk->sk_sndbuf - 32) |
1da177e4 LT |
3657 | goto out; |
3658 | ||
3659 | err = -ENOBUFS; | |
3660 | skb = alloc_skb(len, GFP_KERNEL); | |
3661 | if (skb == NULL) | |
3662 | goto out; | |
3663 | ||
3664 | err = -EFAULT; | |
6ce8e9ce | 3665 | if (memcpy_from_msg(skb_put(skb,len), msg, len)) |
1da177e4 LT |
3666 | goto out; |
3667 | ||
3668 | hdr = pfkey_get_base_msg(skb, &err); | |
3669 | if (!hdr) | |
3670 | goto out; | |
3671 | ||
283bc9f3 | 3672 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 | 3673 | err = pfkey_process(sk, skb, hdr); |
283bc9f3 | 3674 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
3675 | |
3676 | out: | |
3677 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3678 | err = 0; | |
6f961068 | 3679 | kfree_skb(skb); |
1da177e4 LT |
3680 | |
3681 | return err ? : len; | |
3682 | } | |
3683 | ||
1b784140 | 3684 | static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
1da177e4 LT |
3685 | int flags) |
3686 | { | |
3687 | struct sock *sk = sock->sk; | |
83321d6b | 3688 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3689 | struct sk_buff *skb; |
3690 | int copied, err; | |
3691 | ||
3692 | err = -EINVAL; | |
3693 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3694 | goto out; | |
3695 | ||
1da177e4 LT |
3696 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); |
3697 | if (skb == NULL) | |
3698 | goto out; | |
3699 | ||
3700 | copied = skb->len; | |
3701 | if (copied > len) { | |
3702 | msg->msg_flags |= MSG_TRUNC; | |
3703 | copied = len; | |
3704 | } | |
3705 | ||
badff6d0 | 3706 | skb_reset_transport_header(skb); |
51f3d02b | 3707 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
3708 | if (err) |
3709 | goto out_free; | |
3710 | ||
3b885787 | 3711 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
3712 | |
3713 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3714 | ||
83321d6b TT |
3715 | if (pfk->dump.dump != NULL && |
3716 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3717 | pfkey_do_dump(pfk); | |
3718 | ||
1da177e4 LT |
3719 | out_free: |
3720 | skb_free_datagram(sk, skb); | |
3721 | out: | |
3722 | return err; | |
3723 | } | |
3724 | ||
90ddc4f0 | 3725 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3726 | .family = PF_KEY, |
3727 | .owner = THIS_MODULE, | |
3728 | /* Operations that make no sense on pfkey sockets. */ | |
3729 | .bind = sock_no_bind, | |
3730 | .connect = sock_no_connect, | |
3731 | .socketpair = sock_no_socketpair, | |
3732 | .accept = sock_no_accept, | |
3733 | .getname = sock_no_getname, | |
3734 | .ioctl = sock_no_ioctl, | |
3735 | .listen = sock_no_listen, | |
3736 | .shutdown = sock_no_shutdown, | |
3737 | .setsockopt = sock_no_setsockopt, | |
3738 | .getsockopt = sock_no_getsockopt, | |
3739 | .mmap = sock_no_mmap, | |
3740 | .sendpage = sock_no_sendpage, | |
3741 | ||
3742 | /* Now the operations that really occur. */ | |
3743 | .release = pfkey_release, | |
a11e1d43 | 3744 | .poll = datagram_poll, |
1da177e4 LT |
3745 | .sendmsg = pfkey_sendmsg, |
3746 | .recvmsg = pfkey_recvmsg, | |
3747 | }; | |
3748 | ||
ec1b4cf7 | 3749 | static const struct net_proto_family pfkey_family_ops = { |
1da177e4 LT |
3750 | .family = PF_KEY, |
3751 | .create = pfkey_create, | |
3752 | .owner = THIS_MODULE, | |
3753 | }; | |
3754 | ||
3755 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3756 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3757 | { |
27b5b865 | 3758 | struct sock *s = sk_entry(v); |
1da177e4 | 3759 | |
bd2f7476 PE |
3760 | if (v == SEQ_START_TOKEN) |
3761 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3762 | else | |
71338aa7 | 3763 | seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n", |
1da177e4 | 3764 | s, |
41c6d650 | 3765 | refcount_read(&s->sk_refcnt), |
31e6d363 ED |
3766 | sk_rmem_alloc_get(s), |
3767 | sk_wmem_alloc_get(s), | |
a7cb5a49 | 3768 | from_kuid_munged(seq_user_ns(f), sock_i_uid(s)), |
1da177e4 LT |
3769 | sock_i_ino(s) |
3770 | ); | |
bd2f7476 PE |
3771 | return 0; |
3772 | } | |
3773 | ||
3774 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
ada440e3 | 3775 | __acquires(rcu) |
bd2f7476 | 3776 | { |
7013ec30 | 3777 | struct net *net = seq_file_net(f); |
3fa87a32 | 3778 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 3779 | |
7f6b9dbd | 3780 | rcu_read_lock(); |
3781 | return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); | |
bd2f7476 PE |
3782 | } |
3783 | ||
3784 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3785 | { | |
7013ec30 | 3786 | struct net *net = seq_file_net(f); |
3fa87a32 AD |
3787 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3788 | ||
7f6b9dbd | 3789 | return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
bd2f7476 | 3790 | } |
1da177e4 | 3791 | |
bd2f7476 | 3792 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
ada440e3 | 3793 | __releases(rcu) |
bd2f7476 | 3794 | { |
7f6b9dbd | 3795 | rcu_read_unlock(); |
bd2f7476 | 3796 | } |
1da177e4 | 3797 | |
98147d52 | 3798 | static const struct seq_operations pfkey_seq_ops = { |
bd2f7476 PE |
3799 | .start = pfkey_seq_start, |
3800 | .next = pfkey_seq_next, | |
3801 | .stop = pfkey_seq_stop, | |
3802 | .show = pfkey_seq_show, | |
3803 | }; | |
1da177e4 | 3804 | |
7013ec30 | 3805 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 | 3806 | { |
bd2f7476 PE |
3807 | struct proc_dir_entry *e; |
3808 | ||
c3506372 CH |
3809 | e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops, |
3810 | sizeof(struct seq_net_private)); | |
bd2f7476 | 3811 | if (e == NULL) |
61145aa1 | 3812 | return -ENOMEM; |
bd2f7476 | 3813 | |
bd2f7476 | 3814 | return 0; |
61145aa1 PE |
3815 | } |
3816 | ||
2c8c1e72 | 3817 | static void __net_exit pfkey_exit_proc(struct net *net) |
61145aa1 | 3818 | { |
ece31ffd | 3819 | remove_proc_entry("pfkey", net->proc_net); |
61145aa1 PE |
3820 | } |
3821 | #else | |
2c8c1e72 | 3822 | static inline int pfkey_init_proc(struct net *net) |
61145aa1 PE |
3823 | { |
3824 | return 0; | |
3825 | } | |
3826 | ||
2c8c1e72 | 3827 | static inline void pfkey_exit_proc(struct net *net) |
61145aa1 PE |
3828 | { |
3829 | } | |
1da177e4 LT |
3830 | #endif |
3831 | ||
3832 | static struct xfrm_mgr pfkeyv2_mgr = | |
3833 | { | |
1da177e4 LT |
3834 | .notify = pfkey_send_notify, |
3835 | .acquire = pfkey_send_acquire, | |
3836 | .compile_policy = pfkey_compile_policy, | |
3837 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3838 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3839 | .migrate = pfkey_send_migrate, |
0f24558e | 3840 | .is_alive = pfkey_is_alive, |
1da177e4 LT |
3841 | }; |
3842 | ||
3fa87a32 AD |
3843 | static int __net_init pfkey_net_init(struct net *net) |
3844 | { | |
23c049ca | 3845 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3fa87a32 AD |
3846 | int rv; |
3847 | ||
3fa87a32 AD |
3848 | INIT_HLIST_HEAD(&net_pfkey->table); |
3849 | atomic_set(&net_pfkey->socks_nr, 0); | |
23c049ca | 3850 | |
7013ec30 | 3851 | rv = pfkey_init_proc(net); |
3fa87a32 | 3852 | |
3fa87a32 AD |
3853 | return rv; |
3854 | } | |
3855 | ||
3856 | static void __net_exit pfkey_net_exit(struct net *net) | |
3857 | { | |
3858 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
3859 | ||
7013ec30 | 3860 | pfkey_exit_proc(net); |
663faeab | 3861 | WARN_ON(!hlist_empty(&net_pfkey->table)); |
3fa87a32 AD |
3862 | } |
3863 | ||
3864 | static struct pernet_operations pfkey_net_ops = { | |
3865 | .init = pfkey_net_init, | |
3866 | .exit = pfkey_net_exit, | |
23c049ca EB |
3867 | .id = &pfkey_net_id, |
3868 | .size = sizeof(struct netns_pfkey), | |
3fa87a32 AD |
3869 | }; |
3870 | ||
1da177e4 LT |
3871 | static void __exit ipsec_pfkey_exit(void) |
3872 | { | |
3873 | xfrm_unregister_km(&pfkeyv2_mgr); | |
1da177e4 | 3874 | sock_unregister(PF_KEY); |
180211b8 | 3875 | unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3876 | proto_unregister(&key_proto); |
3877 | } | |
3878 | ||
3879 | static int __init ipsec_pfkey_init(void) | |
3880 | { | |
3881 | int err = proto_register(&key_proto, 0); | |
3882 | ||
3883 | if (err != 0) | |
3884 | goto out; | |
3885 | ||
180211b8 | 3886 | err = register_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3887 | if (err != 0) |
3888 | goto out_unregister_key_proto; | |
180211b8 AD |
3889 | err = sock_register(&pfkey_family_ops); |
3890 | if (err != 0) | |
3891 | goto out_unregister_pernet; | |
1da177e4 LT |
3892 | err = xfrm_register_km(&pfkeyv2_mgr); |
3893 | if (err != 0) | |
7013ec30 | 3894 | goto out_sock_unregister; |
1da177e4 LT |
3895 | out: |
3896 | return err; | |
180211b8 | 3897 | |
1da177e4 | 3898 | out_sock_unregister: |
1da177e4 | 3899 | sock_unregister(PF_KEY); |
180211b8 AD |
3900 | out_unregister_pernet: |
3901 | unregister_pernet_subsys(&pfkey_net_ops); | |
1da177e4 LT |
3902 | out_unregister_key_proto: |
3903 | proto_unregister(&key_proto); | |
3904 | goto out; | |
3905 | } | |
3906 | ||
3907 | module_init(ipsec_pfkey_init); | |
3908 | module_exit(ipsec_pfkey_exit); | |
3909 | MODULE_LICENSE("GPL"); | |
3910 | MODULE_ALIAS_NETPROTO(PF_KEY); |