Commit | Line | Data |
---|---|---|
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 | 144 | |
df008c91 | 145 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
146 | return -EPERM; |
147 | if (sock->type != SOCK_RAW) | |
148 | return -ESOCKTNOSUPPORT; | |
149 | if (protocol != PF_KEY_V2) | |
150 | return -EPROTONOSUPPORT; | |
151 | ||
11aa9c28 | 152 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern); |
1da177e4 | 153 | if (sk == NULL) |
a925316a | 154 | return -ENOMEM; |
8ff24541 | 155 | |
89e357d8 YS |
156 | pfk = pfkey_sk(sk); |
157 | mutex_init(&pfk->dump_lock); | |
158 | ||
1da177e4 LT |
159 | sock->ops = &pfkey_ops; |
160 | sock_init_data(sock, sk); | |
161 | ||
162 | sk->sk_family = PF_KEY; | |
163 | sk->sk_destruct = pfkey_sock_destruct; | |
164 | ||
3fa87a32 | 165 | atomic_inc(&net_pfkey->socks_nr); |
1da177e4 LT |
166 | |
167 | pfkey_insert(sk); | |
168 | ||
169 | return 0; | |
1da177e4 LT |
170 | } |
171 | ||
172 | static int pfkey_release(struct socket *sock) | |
173 | { | |
174 | struct sock *sk = sock->sk; | |
175 | ||
176 | if (!sk) | |
177 | return 0; | |
178 | ||
179 | pfkey_remove(sk); | |
180 | ||
181 | sock_orphan(sk); | |
182 | sock->sk = NULL; | |
183 | skb_queue_purge(&sk->sk_write_queue); | |
7f6b9dbd | 184 | |
185 | synchronize_rcu(); | |
1da177e4 LT |
186 | sock_put(sk); |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
fc2d5cfd ST |
191 | static int pfkey_broadcast_one(struct sk_buff *skb, gfp_t allocation, |
192 | struct sock *sk) | |
1da177e4 LT |
193 | { |
194 | int err = -ENOBUFS; | |
195 | ||
fc2d5cfd ST |
196 | if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf) |
197 | return err; | |
198 | ||
199 | skb = skb_clone(skb, allocation); | |
200 | ||
201 | if (skb) { | |
202 | skb_set_owner_r(skb, sk); | |
203 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
204 | sk->sk_data_ready(sk); | |
205 | err = 0; | |
1da177e4 | 206 | } |
1da177e4 LT |
207 | return err; |
208 | } | |
209 | ||
210 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
211 | #define BROADCAST_ALL 0 | |
212 | #define BROADCAST_ONE 1 | |
213 | #define BROADCAST_REGISTERED 2 | |
214 | #define BROADCAST_PROMISC_ONLY 4 | |
36f41f8f | 215 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
07fb0f17 AD |
216 | int broadcast_flags, struct sock *one_sk, |
217 | struct net *net) | |
1da177e4 | 218 | { |
3fa87a32 | 219 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 220 | struct sock *sk; |
1da177e4 LT |
221 | int err = -ESRCH; |
222 | ||
223 | /* XXX Do we need something like netlink_overrun? I think | |
224 | * XXX PF_KEY socket apps will not mind current behavior. | |
225 | */ | |
226 | if (!skb) | |
227 | return -ENOMEM; | |
228 | ||
7f6b9dbd | 229 | rcu_read_lock(); |
b67bfe0d | 230 | sk_for_each_rcu(sk, &net_pfkey->table) { |
1da177e4 LT |
231 | struct pfkey_sock *pfk = pfkey_sk(sk); |
232 | int err2; | |
233 | ||
234 | /* Yes, it means that if you are meant to receive this | |
235 | * pfkey message you receive it twice as promiscuous | |
236 | * socket. | |
237 | */ | |
238 | if (pfk->promisc) | |
fc2d5cfd | 239 | pfkey_broadcast_one(skb, GFP_ATOMIC, sk); |
1da177e4 LT |
240 | |
241 | /* the exact target will be processed later */ | |
242 | if (sk == one_sk) | |
243 | continue; | |
244 | if (broadcast_flags != BROADCAST_ALL) { | |
245 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
246 | continue; | |
247 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
248 | !pfk->registered) | |
249 | continue; | |
250 | if (broadcast_flags & BROADCAST_ONE) | |
251 | continue; | |
252 | } | |
253 | ||
fc2d5cfd | 254 | err2 = pfkey_broadcast_one(skb, GFP_ATOMIC, sk); |
1da177e4 | 255 | |
f6b8dec9 | 256 | /* Error is cleared after successful sending to at least one |
1da177e4 LT |
257 | * registered KM */ |
258 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
259 | err = err2; | |
260 | } | |
7f6b9dbd | 261 | rcu_read_unlock(); |
1da177e4 LT |
262 | |
263 | if (one_sk != NULL) | |
fc2d5cfd | 264 | err = pfkey_broadcast_one(skb, allocation, one_sk); |
1da177e4 | 265 | |
1da177e4 LT |
266 | kfree_skb(skb); |
267 | return err; | |
268 | } | |
269 | ||
05238204 TT |
270 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
271 | { | |
12a169e7 | 272 | struct sadb_msg *hdr; |
05238204 TT |
273 | int rc; |
274 | ||
89e357d8 YS |
275 | mutex_lock(&pfk->dump_lock); |
276 | if (!pfk->dump.dump) { | |
277 | rc = 0; | |
278 | goto out; | |
279 | } | |
280 | ||
05238204 | 281 | rc = pfk->dump.dump(pfk); |
89e357d8 YS |
282 | if (rc == -ENOBUFS) { |
283 | rc = 0; | |
284 | goto out; | |
285 | } | |
05238204 | 286 | |
12a169e7 | 287 | if (pfk->dump.skb) { |
89e357d8 YS |
288 | if (!pfkey_can_dump(&pfk->sk)) { |
289 | rc = 0; | |
290 | goto out; | |
291 | } | |
12a169e7 HX |
292 | |
293 | hdr = (struct sadb_msg *) pfk->dump.skb->data; | |
294 | hdr->sadb_msg_seq = 0; | |
295 | hdr->sadb_msg_errno = rc; | |
36f41f8f | 296 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 297 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
298 | pfk->dump.skb = NULL; |
299 | } | |
300 | ||
05238204 | 301 | pfkey_terminate_dump(pfk); |
89e357d8 YS |
302 | |
303 | out: | |
304 | mutex_unlock(&pfk->dump_lock); | |
05238204 TT |
305 | return rc; |
306 | } | |
307 | ||
4c93fbb0 DM |
308 | static inline void pfkey_hdr_dup(struct sadb_msg *new, |
309 | const struct sadb_msg *orig) | |
1da177e4 LT |
310 | { |
311 | *new = *orig; | |
312 | } | |
313 | ||
4c93fbb0 | 314 | static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk) |
1da177e4 LT |
315 | { |
316 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
317 | struct sadb_msg *hdr; | |
318 | ||
319 | if (!skb) | |
320 | return -ENOBUFS; | |
321 | ||
322 | /* Woe be to the platform trying to support PFKEY yet | |
323 | * having normal errnos outside the 1-255 range, inclusive. | |
324 | */ | |
325 | err = -err; | |
326 | if (err == ERESTARTSYS || | |
327 | err == ERESTARTNOHAND || | |
328 | err == ERESTARTNOINTR) | |
329 | err = EINTR; | |
330 | if (err >= 512) | |
331 | err = EINVAL; | |
09a62660 | 332 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 | 333 | |
4df864c1 | 334 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
335 | pfkey_hdr_dup(hdr, orig); |
336 | hdr->sadb_msg_errno = (uint8_t) err; | |
337 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
338 | sizeof(uint64_t)); | |
339 | ||
36f41f8f | 340 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
341 | |
342 | return 0; | |
343 | } | |
344 | ||
8603b955 | 345 | static const u8 sadb_ext_min_len[] = { |
1da177e4 LT |
346 | [SADB_EXT_RESERVED] = (u8) 0, |
347 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
348 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
349 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
350 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
351 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
352 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
353 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
354 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
355 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
356 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
357 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
358 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
359 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
360 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
361 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
362 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
363 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
364 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
365 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
366 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
367 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
368 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
369 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 370 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
13c1d189 | 371 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
d2c5f658 | 372 | [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter), |
1da177e4 LT |
373 | }; |
374 | ||
375 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
4c93fbb0 | 376 | static int verify_address_len(const void *p) |
1da177e4 | 377 | { |
4c93fbb0 DM |
378 | const struct sadb_address *sp = p; |
379 | const struct sockaddr *addr = (const struct sockaddr *)(sp + 1); | |
380 | const struct sockaddr_in *sin; | |
dfd56b8b | 381 | #if IS_ENABLED(CONFIG_IPV6) |
4c93fbb0 | 382 | const struct sockaddr_in6 *sin6; |
1da177e4 LT |
383 | #endif |
384 | int len; | |
385 | ||
06b335cb EB |
386 | if (sp->sadb_address_len < |
387 | DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family), | |
388 | sizeof(uint64_t))) | |
389 | return -EINVAL; | |
390 | ||
1da177e4 LT |
391 | switch (addr->sa_family) { |
392 | case AF_INET: | |
356f89e1 | 393 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
394 | if (sp->sadb_address_len != len || |
395 | sp->sadb_address_prefixlen > 32) | |
396 | return -EINVAL; | |
397 | break; | |
dfd56b8b | 398 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 399 | case AF_INET6: |
356f89e1 | 400 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
401 | if (sp->sadb_address_len != len || |
402 | sp->sadb_address_prefixlen > 128) | |
403 | return -EINVAL; | |
404 | break; | |
405 | #endif | |
406 | default: | |
407 | /* It is user using kernel to keep track of security | |
408 | * associations for another protocol, such as | |
409 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
410 | * lengths. | |
411 | * | |
412 | * XXX Actually, association/policy database is not yet | |
413 | * XXX able to cope with arbitrary sockaddr families. | |
414 | * XXX When it can, remove this -EINVAL. -DaveM | |
415 | */ | |
416 | return -EINVAL; | |
3ff50b79 | 417 | } |
1da177e4 LT |
418 | |
419 | return 0; | |
420 | } | |
421 | ||
4b66af2d KE |
422 | static inline int sadb_key_len(const struct sadb_key *key) |
423 | { | |
424 | int key_bytes = DIV_ROUND_UP(key->sadb_key_bits, 8); | |
425 | ||
426 | return DIV_ROUND_UP(sizeof(struct sadb_key) + key_bytes, | |
427 | sizeof(uint64_t)); | |
428 | } | |
429 | ||
430 | static int verify_key_len(const void *p) | |
431 | { | |
432 | const struct sadb_key *key = p; | |
433 | ||
434 | if (sadb_key_len(key) > key->sadb_key_len) | |
435 | return -EINVAL; | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
4c93fbb0 | 440 | static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx) |
df71837d | 441 | { |
356f89e1 IJ |
442 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
443 | sec_ctx->sadb_x_ctx_len, | |
444 | sizeof(uint64_t)); | |
df71837d TJ |
445 | } |
446 | ||
4c93fbb0 | 447 | static inline int verify_sec_ctx_len(const void *p) |
df71837d | 448 | { |
4c93fbb0 | 449 | const struct sadb_x_sec_ctx *sec_ctx = p; |
298bb621 | 450 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 451 | |
298bb621 | 452 | if (len > PAGE_SIZE) |
df71837d TJ |
453 | return -EINVAL; |
454 | ||
455 | len = pfkey_sec_ctx_len(sec_ctx); | |
456 | ||
457 | if (sec_ctx->sadb_x_sec_len != len) | |
458 | return -EINVAL; | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
87536a81 NA |
463 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx, |
464 | gfp_t gfp) | |
df71837d TJ |
465 | { |
466 | struct xfrm_user_sec_ctx *uctx = NULL; | |
467 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
468 | ||
87536a81 | 469 | uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp); |
df71837d TJ |
470 | |
471 | if (!uctx) | |
472 | return NULL; | |
473 | ||
474 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
475 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
476 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
477 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
478 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
479 | memcpy(uctx + 1, sec_ctx + 1, | |
480 | uctx->ctx_len); | |
481 | ||
482 | return uctx; | |
483 | } | |
484 | ||
4c93fbb0 DM |
485 | static int present_and_same_family(const struct sadb_address *src, |
486 | const struct sadb_address *dst) | |
1da177e4 | 487 | { |
4c93fbb0 | 488 | const struct sockaddr *s_addr, *d_addr; |
1da177e4 LT |
489 | |
490 | if (!src || !dst) | |
491 | return 0; | |
492 | ||
4c93fbb0 DM |
493 | s_addr = (const struct sockaddr *)(src + 1); |
494 | d_addr = (const struct sockaddr *)(dst + 1); | |
1da177e4 LT |
495 | if (s_addr->sa_family != d_addr->sa_family) |
496 | return 0; | |
497 | if (s_addr->sa_family != AF_INET | |
dfd56b8b | 498 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
499 | && s_addr->sa_family != AF_INET6 |
500 | #endif | |
501 | ) | |
502 | return 0; | |
503 | ||
504 | return 1; | |
505 | } | |
506 | ||
4c93fbb0 | 507 | static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs) |
1da177e4 | 508 | { |
4c93fbb0 | 509 | const char *p = (char *) hdr; |
1da177e4 LT |
510 | int len = skb->len; |
511 | ||
512 | len -= sizeof(*hdr); | |
513 | p += sizeof(*hdr); | |
514 | while (len > 0) { | |
4c93fbb0 | 515 | const struct sadb_ext *ehdr = (const struct sadb_ext *) p; |
1da177e4 LT |
516 | uint16_t ext_type; |
517 | int ext_len; | |
518 | ||
4e765b49 EB |
519 | if (len < sizeof(*ehdr)) |
520 | return -EINVAL; | |
521 | ||
1da177e4 LT |
522 | ext_len = ehdr->sadb_ext_len; |
523 | ext_len *= sizeof(uint64_t); | |
524 | ext_type = ehdr->sadb_ext_type; | |
525 | if (ext_len < sizeof(uint64_t) || | |
526 | ext_len > len || | |
527 | ext_type == SADB_EXT_RESERVED) | |
528 | return -EINVAL; | |
529 | ||
530 | if (ext_type <= SADB_EXT_MAX) { | |
531 | int min = (int) sadb_ext_min_len[ext_type]; | |
532 | if (ext_len < min) | |
533 | return -EINVAL; | |
534 | if (ext_hdrs[ext_type-1] != NULL) | |
535 | return -EINVAL; | |
4b66af2d KE |
536 | switch (ext_type) { |
537 | case SADB_EXT_ADDRESS_SRC: | |
538 | case SADB_EXT_ADDRESS_DST: | |
539 | case SADB_EXT_ADDRESS_PROXY: | |
540 | case SADB_X_EXT_NAT_T_OA: | |
1da177e4 LT |
541 | if (verify_address_len(p)) |
542 | return -EINVAL; | |
4b66af2d KE |
543 | break; |
544 | case SADB_X_EXT_SEC_CTX: | |
df71837d TJ |
545 | if (verify_sec_ctx_len(p)) |
546 | return -EINVAL; | |
4b66af2d KE |
547 | break; |
548 | case SADB_EXT_KEY_AUTH: | |
549 | case SADB_EXT_KEY_ENCRYPT: | |
550 | if (verify_key_len(p)) | |
551 | return -EINVAL; | |
552 | break; | |
553 | default: | |
554 | break; | |
df71837d | 555 | } |
4c93fbb0 | 556 | ext_hdrs[ext_type-1] = (void *) p; |
1da177e4 LT |
557 | } |
558 | p += ext_len; | |
559 | len -= ext_len; | |
560 | } | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
565 | static uint16_t | |
566 | pfkey_satype2proto(uint8_t satype) | |
567 | { | |
568 | switch (satype) { | |
569 | case SADB_SATYPE_UNSPEC: | |
570 | return IPSEC_PROTO_ANY; | |
571 | case SADB_SATYPE_AH: | |
572 | return IPPROTO_AH; | |
573 | case SADB_SATYPE_ESP: | |
574 | return IPPROTO_ESP; | |
575 | case SADB_X_SATYPE_IPCOMP: | |
576 | return IPPROTO_COMP; | |
1da177e4 LT |
577 | default: |
578 | return 0; | |
579 | } | |
580 | /* NOTREACHED */ | |
581 | } | |
582 | ||
583 | static uint8_t | |
584 | pfkey_proto2satype(uint16_t proto) | |
585 | { | |
586 | switch (proto) { | |
587 | case IPPROTO_AH: | |
588 | return SADB_SATYPE_AH; | |
589 | case IPPROTO_ESP: | |
590 | return SADB_SATYPE_ESP; | |
591 | case IPPROTO_COMP: | |
592 | return SADB_X_SATYPE_IPCOMP; | |
1da177e4 LT |
593 | default: |
594 | return 0; | |
595 | } | |
596 | /* NOTREACHED */ | |
597 | } | |
598 | ||
599 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
600 | * say specifically 'just raw sockets' as we encode them as 255. | |
601 | */ | |
602 | ||
603 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
604 | { | |
a02cec21 | 605 | return proto == IPSEC_PROTO_ANY ? 0 : proto; |
1da177e4 LT |
606 | } |
607 | ||
608 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
609 | { | |
a02cec21 | 610 | return proto ? proto : IPSEC_PROTO_ANY; |
1da177e4 LT |
611 | } |
612 | ||
9e8b4ed8 YH |
613 | static inline int pfkey_sockaddr_len(sa_family_t family) |
614 | { | |
615 | switch (family) { | |
616 | case AF_INET: | |
617 | return sizeof(struct sockaddr_in); | |
dfd56b8b | 618 | #if IS_ENABLED(CONFIG_IPV6) |
9e8b4ed8 YH |
619 | case AF_INET6: |
620 | return sizeof(struct sockaddr_in6); | |
621 | #endif | |
622 | } | |
623 | return 0; | |
624 | } | |
625 | ||
5f95ac91 YH |
626 | static |
627 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 628 | { |
5f95ac91 | 629 | switch (sa->sa_family) { |
1da177e4 | 630 | case AF_INET: |
8ff24541 | 631 | xaddr->a4 = |
5f95ac91 | 632 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 | 633 | return AF_INET; |
dfd56b8b | 634 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 635 | case AF_INET6: |
8ff24541 | 636 | memcpy(xaddr->a6, |
5f95ac91 | 637 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
638 | sizeof(struct in6_addr)); |
639 | return AF_INET6; | |
640 | #endif | |
1da177e4 | 641 | } |
5f95ac91 YH |
642 | return 0; |
643 | } | |
644 | ||
645 | static | |
4c93fbb0 | 646 | int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr) |
5f95ac91 YH |
647 | { |
648 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
649 | xaddr); | |
1da177e4 LT |
650 | } |
651 | ||
4c93fbb0 | 652 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 653 | { |
4c93fbb0 DM |
654 | const struct sadb_sa *sa; |
655 | const struct sadb_address *addr; | |
1da177e4 LT |
656 | uint16_t proto; |
657 | unsigned short family; | |
658 | xfrm_address_t *xaddr; | |
659 | ||
ea110733 | 660 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
661 | if (sa == NULL) |
662 | return NULL; | |
663 | ||
664 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
665 | if (proto == 0) | |
666 | return NULL; | |
667 | ||
668 | /* sadb_address_len should be checked by caller */ | |
ea110733 | 669 | addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
1da177e4 LT |
670 | if (addr == NULL) |
671 | return NULL; | |
672 | ||
4c93fbb0 | 673 | family = ((const struct sockaddr *)(addr + 1))->sa_family; |
1da177e4 LT |
674 | switch (family) { |
675 | case AF_INET: | |
4c93fbb0 | 676 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr; |
1da177e4 | 677 | break; |
dfd56b8b | 678 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 679 | case AF_INET6: |
4c93fbb0 | 680 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr; |
1da177e4 LT |
681 | break; |
682 | #endif | |
683 | default: | |
684 | xaddr = NULL; | |
685 | } | |
686 | ||
687 | if (!xaddr) | |
688 | return NULL; | |
689 | ||
bd55775c | 690 | return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family); |
1da177e4 LT |
691 | } |
692 | ||
693 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 694 | |
1da177e4 LT |
695 | static int |
696 | pfkey_sockaddr_size(sa_family_t family) | |
697 | { | |
9e8b4ed8 | 698 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
699 | } |
700 | ||
55569ce2 KM |
701 | static inline int pfkey_mode_from_xfrm(int mode) |
702 | { | |
703 | switch(mode) { | |
704 | case XFRM_MODE_TRANSPORT: | |
705 | return IPSEC_MODE_TRANSPORT; | |
706 | case XFRM_MODE_TUNNEL: | |
707 | return IPSEC_MODE_TUNNEL; | |
708 | case XFRM_MODE_BEET: | |
709 | return IPSEC_MODE_BEET; | |
710 | default: | |
711 | return -1; | |
712 | } | |
713 | } | |
714 | ||
715 | static inline int pfkey_mode_to_xfrm(int mode) | |
716 | { | |
717 | switch(mode) { | |
718 | case IPSEC_MODE_ANY: /*XXX*/ | |
719 | case IPSEC_MODE_TRANSPORT: | |
720 | return XFRM_MODE_TRANSPORT; | |
721 | case IPSEC_MODE_TUNNEL: | |
722 | return XFRM_MODE_TUNNEL; | |
723 | case IPSEC_MODE_BEET: | |
724 | return XFRM_MODE_BEET; | |
725 | default: | |
726 | return -1; | |
727 | } | |
728 | } | |
729 | ||
183cad12 | 730 | static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port, |
4c93fbb0 DM |
731 | struct sockaddr *sa, |
732 | unsigned short family) | |
e5b56652 YH |
733 | { |
734 | switch (family) { | |
735 | case AF_INET: | |
736 | { | |
737 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
738 | sin->sin_family = AF_INET; | |
739 | sin->sin_port = port; | |
740 | sin->sin_addr.s_addr = xaddr->a4; | |
741 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
742 | return 32; | |
743 | } | |
dfd56b8b | 744 | #if IS_ENABLED(CONFIG_IPV6) |
e5b56652 YH |
745 | case AF_INET6: |
746 | { | |
747 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
748 | sin6->sin6_family = AF_INET6; | |
749 | sin6->sin6_port = port; | |
750 | sin6->sin6_flowinfo = 0; | |
15e318bd | 751 | sin6->sin6_addr = xaddr->in6; |
e5b56652 YH |
752 | sin6->sin6_scope_id = 0; |
753 | return 128; | |
754 | } | |
755 | #endif | |
756 | } | |
757 | return 0; | |
758 | } | |
759 | ||
4c93fbb0 | 760 | static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, |
050f009e | 761 | int add_keys, int hsc) |
1da177e4 LT |
762 | { |
763 | struct sk_buff *skb; | |
764 | struct sadb_msg *hdr; | |
765 | struct sadb_sa *sa; | |
766 | struct sadb_lifetime *lifetime; | |
767 | struct sadb_address *addr; | |
768 | struct sadb_key *key; | |
769 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
770 | struct sadb_x_sec_ctx *sec_ctx; |
771 | struct xfrm_sec_ctx *xfrm_ctx; | |
772 | int ctx_size = 0; | |
1da177e4 LT |
773 | int size; |
774 | int auth_key_size = 0; | |
775 | int encrypt_key_size = 0; | |
776 | int sockaddr_size; | |
777 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 778 | int mode; |
1da177e4 LT |
779 | |
780 | /* address family check */ | |
781 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
782 | if (!sockaddr_size) | |
783 | return ERR_PTR(-EINVAL); | |
784 | ||
785 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
786 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 787 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
788 | sizeof(struct sadb_lifetime) + |
789 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
790 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 791 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
792 | sockaddr_size*2 + |
793 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
794 | |
795 | if ((xfrm_ctx = x->security)) { | |
796 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
797 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
798 | } | |
799 | ||
1da177e4 | 800 | /* identity & sensitivity */ |
70e94e66 | 801 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
802 | size += sizeof(struct sadb_address) + sockaddr_size; |
803 | ||
804 | if (add_keys) { | |
805 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
806 | auth_key_size = |
807 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
808 | size += sizeof(struct sadb_key) + auth_key_size; |
809 | } | |
810 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
811 | encrypt_key_size = |
812 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
813 | size += sizeof(struct sadb_key) + encrypt_key_size; |
814 | } | |
815 | } | |
816 | if (x->encap) | |
817 | natt = x->encap; | |
818 | ||
819 | if (natt && natt->encap_type) { | |
820 | size += sizeof(struct sadb_x_nat_t_type); | |
821 | size += sizeof(struct sadb_x_nat_t_port); | |
822 | size += sizeof(struct sadb_x_nat_t_port); | |
823 | } | |
824 | ||
825 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
826 | if (skb == NULL) | |
827 | return ERR_PTR(-ENOBUFS); | |
828 | ||
829 | /* call should fill header later */ | |
4df864c1 | 830 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
831 | memset(hdr, 0, size); /* XXX do we need this ? */ |
832 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
833 | ||
834 | /* sa */ | |
4df864c1 | 835 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
836 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
837 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
838 | sa->sadb_sa_spi = x->id.spi; | |
839 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
840 | switch (x->km.state) { |
841 | case XFRM_STATE_VALID: | |
842 | sa->sadb_sa_state = x->km.dying ? | |
843 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
844 | break; | |
845 | case XFRM_STATE_ACQ: | |
1da177e4 | 846 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
847 | break; |
848 | default: | |
1da177e4 | 849 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
850 | break; |
851 | } | |
1da177e4 LT |
852 | sa->sadb_sa_auth = 0; |
853 | if (x->aalg) { | |
854 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
7e50f84c JK |
855 | sa->sadb_sa_auth = (a && a->pfkey_supported) ? |
856 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
857 | } |
858 | sa->sadb_sa_encrypt = 0; | |
859 | BUG_ON(x->ealg && x->calg); | |
860 | if (x->ealg) { | |
861 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
7e50f84c JK |
862 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
863 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
864 | } |
865 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
866 | if (x->calg) { | |
867 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
7e50f84c JK |
868 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
869 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
870 | } |
871 | ||
872 | sa->sadb_sa_flags = 0; | |
873 | if (x->props.flags & XFRM_STATE_NOECN) | |
874 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
875 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
876 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
877 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
878 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
879 | |
880 | /* hard time */ | |
881 | if (hsc & 2) { | |
4df864c1 | 882 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
883 | lifetime->sadb_lifetime_len = |
884 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
885 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
886 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
887 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
888 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
889 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
890 | } | |
891 | /* soft time */ | |
892 | if (hsc & 1) { | |
4df864c1 | 893 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
894 | lifetime->sadb_lifetime_len = |
895 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
896 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
897 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
898 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
899 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
900 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
901 | } | |
902 | /* current time */ | |
4df864c1 | 903 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
904 | lifetime->sadb_lifetime_len = |
905 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
906 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
907 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
908 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
909 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
910 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
911 | /* src address */ | |
4df864c1 | 912 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 913 | addr->sadb_address_len = |
1da177e4 LT |
914 | (sizeof(struct sadb_address)+sockaddr_size)/ |
915 | sizeof(uint64_t); | |
916 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
917 | /* "if the ports are non-zero, then the sadb_address_proto field, |
918 | normally zero, MUST be filled in with the transport | |
1da177e4 | 919 | protocol's number." - RFC2367 */ |
8ff24541 | 920 | addr->sadb_address_proto = 0; |
1da177e4 | 921 | addr->sadb_address_reserved = 0; |
1da177e4 | 922 | |
e5b56652 YH |
923 | addr->sadb_address_prefixlen = |
924 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
925 | (struct sockaddr *) (addr + 1), | |
926 | x->props.family); | |
de47c5d8 | 927 | BUG_ON(!addr->sadb_address_prefixlen); |
1da177e4 LT |
928 | |
929 | /* dst address */ | |
4df864c1 | 930 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 931 | addr->sadb_address_len = |
1da177e4 LT |
932 | (sizeof(struct sadb_address)+sockaddr_size)/ |
933 | sizeof(uint64_t); | |
934 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 935 | addr->sadb_address_proto = 0; |
1da177e4 | 936 | addr->sadb_address_reserved = 0; |
1da177e4 | 937 | |
e5b56652 YH |
938 | addr->sadb_address_prefixlen = |
939 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
940 | (struct sockaddr *) (addr + 1), | |
941 | x->props.family); | |
de47c5d8 | 942 | BUG_ON(!addr->sadb_address_prefixlen); |
1da177e4 | 943 | |
70e94e66 YH |
944 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, |
945 | x->props.family)) { | |
4df864c1 JB |
946 | addr = skb_put(skb, |
947 | sizeof(struct sadb_address) + sockaddr_size); | |
e5b56652 YH |
948 | addr->sadb_address_len = |
949 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
950 | sizeof(uint64_t); | |
951 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
952 | addr->sadb_address_proto = | |
953 | pfkey_proto_from_xfrm(x->sel.proto); | |
954 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
955 | addr->sadb_address_reserved = 0; | |
1da177e4 | 956 | |
e5b56652 YH |
957 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
958 | (struct sockaddr *) (addr + 1), | |
959 | x->props.family); | |
1da177e4 | 960 | } |
1da177e4 LT |
961 | |
962 | /* auth key */ | |
963 | if (add_keys && auth_key_size) { | |
4df864c1 | 964 | key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size); |
1da177e4 LT |
965 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / |
966 | sizeof(uint64_t); | |
967 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
968 | key->sadb_key_bits = x->aalg->alg_key_len; | |
969 | key->sadb_key_reserved = 0; | |
970 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
971 | } | |
972 | /* encrypt key */ | |
973 | if (add_keys && encrypt_key_size) { | |
4df864c1 | 974 | key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size); |
8ff24541 | 975 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
976 | encrypt_key_size) / sizeof(uint64_t); |
977 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
978 | key->sadb_key_bits = x->ealg->alg_key_len; | |
979 | key->sadb_key_reserved = 0; | |
8ff24541 | 980 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
981 | (x->ealg->alg_key_len+7)/8); |
982 | } | |
983 | ||
984 | /* sa */ | |
4df864c1 | 985 | sa2 = skb_put(skb, sizeof(struct sadb_x_sa2)); |
1da177e4 LT |
986 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); |
987 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
988 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
989 | kfree_skb(skb); | |
990 | return ERR_PTR(-EINVAL); | |
991 | } | |
992 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
993 | sa2->sadb_x_sa2_reserved1 = 0; |
994 | sa2->sadb_x_sa2_reserved2 = 0; | |
995 | sa2->sadb_x_sa2_sequence = 0; | |
996 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
997 | ||
998 | if (natt && natt->encap_type) { | |
999 | struct sadb_x_nat_t_type *n_type; | |
1000 | struct sadb_x_nat_t_port *n_port; | |
1001 | ||
1002 | /* type */ | |
4df864c1 | 1003 | n_type = skb_put(skb, sizeof(*n_type)); |
1da177e4 LT |
1004 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); |
1005 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
1006 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
1007 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
1008 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
1009 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
1010 | ||
1011 | /* source port */ | |
4df864c1 | 1012 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
1013 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
1014 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
1015 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
1016 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1017 | ||
1018 | /* dest port */ | |
4df864c1 | 1019 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
1020 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
1021 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
1022 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
1023 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1024 | } | |
1025 | ||
df71837d TJ |
1026 | /* security context */ |
1027 | if (xfrm_ctx) { | |
4df864c1 JB |
1028 | sec_ctx = skb_put(skb, |
1029 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
df71837d TJ |
1030 | sec_ctx->sadb_x_sec_len = |
1031 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1032 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1033 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1034 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1035 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1036 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1037 | xfrm_ctx->ctx_len); | |
1038 | } | |
1039 | ||
1da177e4 LT |
1040 | return skb; |
1041 | } | |
1042 | ||
050f009e | 1043 | |
4c93fbb0 | 1044 | static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x) |
050f009e HX |
1045 | { |
1046 | struct sk_buff *skb; | |
1047 | ||
050f009e | 1048 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1049 | |
1050 | return skb; | |
1051 | } | |
1052 | ||
4c93fbb0 | 1053 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x, |
050f009e HX |
1054 | int hsc) |
1055 | { | |
1056 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1057 | } | |
1058 | ||
07fb0f17 | 1059 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
4c93fbb0 DM |
1060 | const struct sadb_msg *hdr, |
1061 | void * const *ext_hdrs) | |
1da177e4 | 1062 | { |
8ff24541 | 1063 | struct xfrm_state *x; |
4c93fbb0 DM |
1064 | const struct sadb_lifetime *lifetime; |
1065 | const struct sadb_sa *sa; | |
1066 | const struct sadb_key *key; | |
1067 | const struct sadb_x_sec_ctx *sec_ctx; | |
1da177e4 LT |
1068 | uint16_t proto; |
1069 | int err; | |
8ff24541 | 1070 | |
1da177e4 | 1071 | |
ea110733 | 1072 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
1073 | if (!sa || |
1074 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1075 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1076 | return ERR_PTR(-EINVAL); | |
1077 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1078 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1079 | return ERR_PTR(-EINVAL); | |
1080 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1081 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1082 | return ERR_PTR(-EINVAL); | |
1083 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1084 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1085 | return ERR_PTR(-EINVAL); | |
1086 | ||
1087 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1088 | if (proto == 0) | |
1089 | return ERR_PTR(-EINVAL); | |
1090 | ||
1091 | /* default error is no buffer space */ | |
1092 | err = -ENOBUFS; | |
1093 | ||
1094 | /* RFC2367: | |
1095 | ||
1096 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1097 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1098 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1099 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1100 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1101 | not true. | |
1102 | ||
8ff24541 | 1103 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1104 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1105 | */ | |
1106 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1107 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1108 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1109 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1110 | return ERR_PTR(-EINVAL); | |
ea110733 | 1111 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1112 | if (key != NULL && |
1113 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
4b66af2d | 1114 | key->sadb_key_bits == 0) |
1da177e4 LT |
1115 | return ERR_PTR(-EINVAL); |
1116 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1117 | if (key != NULL && | |
1118 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
4b66af2d | 1119 | key->sadb_key_bits == 0) |
1da177e4 LT |
1120 | return ERR_PTR(-EINVAL); |
1121 | ||
07fb0f17 | 1122 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1123 | if (x == NULL) |
1124 | return ERR_PTR(-ENOBUFS); | |
1125 | ||
1126 | x->id.proto = proto; | |
1127 | x->id.spi = sa->sadb_sa_spi; | |
33fce60d FD |
1128 | x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay, |
1129 | (sizeof(x->replay.bitmap) * 8)); | |
1da177e4 LT |
1130 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) |
1131 | x->props.flags |= XFRM_STATE_NOECN; | |
1132 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1133 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1134 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1135 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 | 1136 | |
ea110733 | 1137 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1]; |
1da177e4 LT |
1138 | if (lifetime != NULL) { |
1139 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1140 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1141 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1142 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1143 | } | |
ea110733 | 1144 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1]; |
1da177e4 LT |
1145 | if (lifetime != NULL) { |
1146 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1147 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1148 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1149 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1150 | } | |
df71837d | 1151 | |
ea110733 | 1152 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 1153 | if (sec_ctx != NULL) { |
87536a81 | 1154 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
1155 | |
1156 | if (!uctx) | |
1157 | goto out; | |
1158 | ||
1159 | err = security_xfrm_state_alloc(x, uctx); | |
1160 | kfree(uctx); | |
1161 | ||
1162 | if (err) | |
1163 | goto out; | |
1164 | } | |
1165 | ||
e747f643 | 1166 | err = -ENOBUFS; |
ea110733 | 1167 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1168 | if (sa->sadb_sa_auth) { |
1169 | int keysize = 0; | |
1170 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
7e50f84c | 1171 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1172 | err = -ENOSYS; |
1173 | goto out; | |
1174 | } | |
1175 | if (key) | |
1176 | keysize = (key->sadb_key_bits + 7) / 8; | |
1177 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1178 | if (!x->aalg) { |
1179 | err = -ENOMEM; | |
1da177e4 | 1180 | goto out; |
1e3d0c2c | 1181 | } |
1da177e4 LT |
1182 | strcpy(x->aalg->alg_name, a->name); |
1183 | x->aalg->alg_key_len = 0; | |
1184 | if (key) { | |
1185 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1186 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1187 | } | |
c20a66f4 | 1188 | x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1da177e4 LT |
1189 | x->props.aalgo = sa->sadb_sa_auth; |
1190 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1191 | } | |
1192 | if (sa->sadb_sa_encrypt) { | |
1193 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1194 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1195 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1196 | err = -ENOSYS; |
1197 | goto out; | |
1198 | } | |
1199 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1e3d0c2c DC |
1200 | if (!x->calg) { |
1201 | err = -ENOMEM; | |
1da177e4 | 1202 | goto out; |
1e3d0c2c | 1203 | } |
1da177e4 LT |
1204 | strcpy(x->calg->alg_name, a->name); |
1205 | x->props.calgo = sa->sadb_sa_encrypt; | |
1206 | } else { | |
1207 | int keysize = 0; | |
1208 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1209 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1210 | err = -ENOSYS; |
1211 | goto out; | |
1212 | } | |
1213 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1214 | if (key) | |
1215 | keysize = (key->sadb_key_bits + 7) / 8; | |
1216 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1217 | if (!x->ealg) { |
1218 | err = -ENOMEM; | |
1da177e4 | 1219 | goto out; |
1e3d0c2c | 1220 | } |
1da177e4 LT |
1221 | strcpy(x->ealg->alg_name, a->name); |
1222 | x->ealg->alg_key_len = 0; | |
1223 | if (key) { | |
1224 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1225 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1226 | } | |
1227 | x->props.ealgo = sa->sadb_sa_encrypt; | |
69b0137f | 1228 | x->geniv = a->uinfo.encr.geniv; |
1da177e4 LT |
1229 | } |
1230 | } | |
1231 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1232 | ||
8ff24541 | 1233 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 | 1234 | &x->props.saddr); |
8ff24541 | 1235 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1236 | &x->id.daddr); |
1237 | ||
1238 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
4c93fbb0 | 1239 | const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1]; |
55569ce2 KM |
1240 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1241 | if (mode < 0) { | |
1242 | err = -EINVAL; | |
1243 | goto out; | |
1244 | } | |
1245 | x->props.mode = mode; | |
1da177e4 LT |
1246 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1247 | } | |
1248 | ||
1249 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
4c93fbb0 | 1250 | const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; |
1da177e4 LT |
1251 | |
1252 | /* Nobody uses this, but we try. */ | |
1253 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1254 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1255 | } | |
1256 | ||
4da51056 | 1257 | if (!x->sel.family) |
4a4b6271 JL |
1258 | x->sel.family = x->props.family; |
1259 | ||
1da177e4 | 1260 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
4c93fbb0 | 1261 | const struct sadb_x_nat_t_type* n_type; |
1da177e4 LT |
1262 | struct xfrm_encap_tmpl *natt; |
1263 | ||
1264 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1e3d0c2c DC |
1265 | if (!x->encap) { |
1266 | err = -ENOMEM; | |
1da177e4 | 1267 | goto out; |
1e3d0c2c | 1268 | } |
1da177e4 LT |
1269 | |
1270 | natt = x->encap; | |
1271 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1272 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1273 | ||
1274 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
4c93fbb0 | 1275 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1276 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; |
1277 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1278 | } | |
1279 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
4c93fbb0 | 1280 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1281 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; |
1282 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1283 | } | |
a8d694c6 | 1284 | memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1da177e4 LT |
1285 | } |
1286 | ||
72cb6962 HX |
1287 | err = xfrm_init_state(x); |
1288 | if (err) | |
1da177e4 | 1289 | goto out; |
72cb6962 | 1290 | |
1da177e4 | 1291 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1292 | return x; |
1293 | ||
1294 | out: | |
1295 | x->km.state = XFRM_STATE_DEAD; | |
1296 | xfrm_state_put(x); | |
1297 | return ERR_PTR(err); | |
1298 | } | |
1299 | ||
4c93fbb0 | 1300 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1301 | { |
1302 | return -EOPNOTSUPP; | |
1303 | } | |
1304 | ||
4c93fbb0 | 1305 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1306 | { |
07fb0f17 | 1307 | struct net *net = sock_net(sk); |
1da177e4 LT |
1308 | struct sk_buff *resp_skb; |
1309 | struct sadb_x_sa2 *sa2; | |
1310 | struct sadb_address *saddr, *daddr; | |
1311 | struct sadb_msg *out_hdr; | |
658b219e | 1312 | struct sadb_spirange *range; |
1da177e4 | 1313 | struct xfrm_state *x = NULL; |
55569ce2 | 1314 | int mode; |
658b219e HX |
1315 | int err; |
1316 | u32 min_spi, max_spi; | |
1da177e4 LT |
1317 | u32 reqid; |
1318 | u8 proto; | |
1319 | unsigned short family; | |
1320 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1321 | ||
1322 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1323 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1324 | return -EINVAL; | |
1325 | ||
1326 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1327 | if (proto == 0) | |
1328 | return -EINVAL; | |
1329 | ||
1330 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1331 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1332 | if (mode < 0) | |
1333 | return -EINVAL; | |
1da177e4 LT |
1334 | reqid = sa2->sadb_x_sa2_reqid; |
1335 | } else { | |
1336 | mode = 0; | |
1337 | reqid = 0; | |
1338 | } | |
1339 | ||
1340 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1341 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1342 | ||
1343 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1344 | switch (family) { | |
1345 | case AF_INET: | |
1346 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1347 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1348 | break; | |
dfd56b8b | 1349 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1350 | case AF_INET6: |
1351 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1352 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1353 | break; | |
1354 | #endif | |
1355 | } | |
1356 | ||
1357 | if (hdr->sadb_msg_seq) { | |
bd55775c | 1358 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
70e94e66 | 1359 | if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) { |
1da177e4 LT |
1360 | xfrm_state_put(x); |
1361 | x = NULL; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | if (!x) | |
7e652640 | 1366 | x = xfrm_find_acq(net, &dummy_mark, mode, reqid, 0, proto, xdaddr, xsaddr, 1, family); |
1da177e4 LT |
1367 | |
1368 | if (x == NULL) | |
1369 | return -ENOENT; | |
1370 | ||
658b219e HX |
1371 | min_spi = 0x100; |
1372 | max_spi = 0x0fffffff; | |
1da177e4 | 1373 | |
658b219e HX |
1374 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1375 | if (range) { | |
1376 | min_spi = range->sadb_spirange_min; | |
1377 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1378 | } |
658b219e | 1379 | |
776e9dd9 FD |
1380 | err = verify_spi_info(x->id.proto, min_spi, max_spi); |
1381 | if (err) { | |
1382 | xfrm_state_put(x); | |
1383 | return err; | |
1384 | } | |
1385 | ||
658b219e | 1386 | err = xfrm_alloc_spi(x, min_spi, max_spi); |
050f009e | 1387 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1388 | |
1389 | if (IS_ERR(resp_skb)) { | |
1390 | xfrm_state_put(x); | |
1391 | return PTR_ERR(resp_skb); | |
1392 | } | |
1393 | ||
1394 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1395 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1396 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1397 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1398 | out_hdr->sadb_msg_errno = 0; | |
1399 | out_hdr->sadb_msg_reserved = 0; | |
1400 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1401 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1402 | ||
1403 | xfrm_state_put(x); | |
1404 | ||
36f41f8f | 1405 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4 LT |
1406 | |
1407 | return 0; | |
1408 | } | |
1409 | ||
4c93fbb0 | 1410 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1411 | { |
07fb0f17 | 1412 | struct net *net = sock_net(sk); |
1da177e4 LT |
1413 | struct xfrm_state *x; |
1414 | ||
1415 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1416 | return -EOPNOTSUPP; | |
1417 | ||
1418 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1419 | return 0; | |
1420 | ||
bd55775c | 1421 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4 LT |
1422 | if (x == NULL) |
1423 | return 0; | |
1424 | ||
1425 | spin_lock_bh(&x->lock); | |
5b8ef341 | 1426 | if (x->km.state == XFRM_STATE_ACQ) |
1da177e4 | 1427 | x->km.state = XFRM_STATE_ERROR; |
5b8ef341 | 1428 | |
1da177e4 LT |
1429 | spin_unlock_bh(&x->lock); |
1430 | xfrm_state_put(x); | |
1431 | return 0; | |
1432 | } | |
1433 | ||
26b15dad JHS |
1434 | static inline int event2poltype(int event) |
1435 | { | |
1436 | switch (event) { | |
f60f6b8f | 1437 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1438 | return SADB_X_SPDDELETE; |
f60f6b8f | 1439 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1440 | return SADB_X_SPDADD; |
f60f6b8f | 1441 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1442 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1443 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1444 | // return SADB_X_SPDEXPIRE; |
1445 | default: | |
207024b9 | 1446 | pr_err("pfkey: Unknown policy event %d\n", event); |
26b15dad JHS |
1447 | break; |
1448 | } | |
1449 | ||
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | static inline int event2keytype(int event) | |
1454 | { | |
1455 | switch (event) { | |
f60f6b8f | 1456 | case XFRM_MSG_DELSA: |
26b15dad | 1457 | return SADB_DELETE; |
f60f6b8f | 1458 | case XFRM_MSG_NEWSA: |
26b15dad | 1459 | return SADB_ADD; |
f60f6b8f | 1460 | case XFRM_MSG_UPDSA: |
26b15dad | 1461 | return SADB_UPDATE; |
f60f6b8f | 1462 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1463 | return SADB_EXPIRE; |
1464 | default: | |
207024b9 | 1465 | pr_err("pfkey: Unknown SA event %d\n", event); |
26b15dad JHS |
1466 | break; |
1467 | } | |
1468 | ||
1469 | return 0; | |
1470 | } | |
1471 | ||
1472 | /* ADD/UPD/DEL */ | |
214e005b | 1473 | static int key_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1474 | { |
1475 | struct sk_buff *skb; | |
1476 | struct sadb_msg *hdr; | |
26b15dad | 1477 | |
050f009e | 1478 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1479 | |
1480 | if (IS_ERR(skb)) | |
1481 | return PTR_ERR(skb); | |
1482 | ||
1483 | hdr = (struct sadb_msg *) skb->data; | |
1484 | hdr->sadb_msg_version = PF_KEY_V2; | |
1485 | hdr->sadb_msg_type = event2keytype(c->event); | |
1486 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1487 | hdr->sadb_msg_errno = 0; | |
1488 | hdr->sadb_msg_reserved = 0; | |
1489 | hdr->sadb_msg_seq = c->seq; | |
15e47304 | 1490 | hdr->sadb_msg_pid = c->portid; |
26b15dad | 1491 | |
36f41f8f | 1492 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad JHS |
1493 | |
1494 | return 0; | |
1495 | } | |
1da177e4 | 1496 | |
4c93fbb0 | 1497 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1498 | { |
07fb0f17 | 1499 | struct net *net = sock_net(sk); |
1da177e4 LT |
1500 | struct xfrm_state *x; |
1501 | int err; | |
26b15dad | 1502 | struct km_event c; |
1da177e4 | 1503 | |
07fb0f17 | 1504 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4 LT |
1505 | if (IS_ERR(x)) |
1506 | return PTR_ERR(x); | |
1507 | ||
26b15dad | 1508 | xfrm_state_hold(x); |
1da177e4 LT |
1509 | if (hdr->sadb_msg_type == SADB_ADD) |
1510 | err = xfrm_state_add(x); | |
1511 | else | |
1512 | err = xfrm_state_update(x); | |
1513 | ||
2e71029e | 1514 | xfrm_audit_state_add(x, err ? 0 : 1, true); |
161a09e7 | 1515 | |
1da177e4 LT |
1516 | if (err < 0) { |
1517 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1518 | __xfrm_state_put(x); |
7d6dfe1f | 1519 | goto out; |
1da177e4 LT |
1520 | } |
1521 | ||
26b15dad | 1522 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1523 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1524 | else |
f60f6b8f | 1525 | c.event = XFRM_MSG_UPDSA; |
26b15dad | 1526 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1527 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 1528 | km_state_notify(x, &c); |
7d6dfe1f | 1529 | out: |
26b15dad | 1530 | xfrm_state_put(x); |
26b15dad | 1531 | return err; |
1da177e4 LT |
1532 | } |
1533 | ||
4c93fbb0 | 1534 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1535 | { |
07fb0f17 | 1536 | struct net *net = sock_net(sk); |
1da177e4 | 1537 | struct xfrm_state *x; |
26b15dad JHS |
1538 | struct km_event c; |
1539 | int err; | |
1da177e4 LT |
1540 | |
1541 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1542 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1543 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1544 | return -EINVAL; | |
1545 | ||
07fb0f17 | 1546 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1547 | if (x == NULL) |
1548 | return -ESRCH; | |
1549 | ||
c8c05a8e CZ |
1550 | if ((err = security_xfrm_state_delete(x))) |
1551 | goto out; | |
1552 | ||
1da177e4 | 1553 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1554 | err = -EPERM; |
1555 | goto out; | |
1da177e4 | 1556 | } |
161a09e7 | 1557 | |
26b15dad | 1558 | err = xfrm_state_delete(x); |
161a09e7 | 1559 | |
c8c05a8e CZ |
1560 | if (err < 0) |
1561 | goto out; | |
1da177e4 | 1562 | |
26b15dad | 1563 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1564 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1565 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1566 | km_state_notify(x, &c); |
c8c05a8e | 1567 | out: |
2e71029e | 1568 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
26b15dad | 1569 | xfrm_state_put(x); |
1da177e4 | 1570 | |
26b15dad | 1571 | return err; |
1da177e4 LT |
1572 | } |
1573 | ||
4c93fbb0 | 1574 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1575 | { |
07fb0f17 | 1576 | struct net *net = sock_net(sk); |
1da177e4 LT |
1577 | __u8 proto; |
1578 | struct sk_buff *out_skb; | |
1579 | struct sadb_msg *out_hdr; | |
1580 | struct xfrm_state *x; | |
1581 | ||
1582 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1583 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1584 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1585 | return -EINVAL; | |
1586 | ||
07fb0f17 | 1587 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1588 | if (x == NULL) |
1589 | return -ESRCH; | |
1590 | ||
050f009e | 1591 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1592 | proto = x->id.proto; |
1593 | xfrm_state_put(x); | |
1594 | if (IS_ERR(out_skb)) | |
1595 | return PTR_ERR(out_skb); | |
1596 | ||
1597 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1598 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1599 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1600 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1601 | out_hdr->sadb_msg_errno = 0; | |
1602 | out_hdr->sadb_msg_reserved = 0; | |
1603 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1604 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 1605 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
1606 | |
1607 | return 0; | |
1608 | } | |
1609 | ||
4c93fbb0 | 1610 | static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, |
dd0fc66f | 1611 | gfp_t allocation) |
1da177e4 LT |
1612 | { |
1613 | struct sk_buff *skb; | |
1614 | struct sadb_msg *hdr; | |
1615 | int len, auth_len, enc_len, i; | |
1616 | ||
7e50f84c | 1617 | auth_len = xfrm_count_pfkey_auth_supported(); |
1da177e4 LT |
1618 | if (auth_len) { |
1619 | auth_len *= sizeof(struct sadb_alg); | |
1620 | auth_len += sizeof(struct sadb_supported); | |
1621 | } | |
8ff24541 | 1622 | |
7e50f84c | 1623 | enc_len = xfrm_count_pfkey_enc_supported(); |
1da177e4 LT |
1624 | if (enc_len) { |
1625 | enc_len *= sizeof(struct sadb_alg); | |
1626 | enc_len += sizeof(struct sadb_supported); | |
1627 | } | |
8ff24541 | 1628 | |
1da177e4 LT |
1629 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1630 | ||
1631 | skb = alloc_skb(len + 16, allocation); | |
1632 | if (!skb) | |
1633 | goto out_put_algs; | |
1634 | ||
4df864c1 | 1635 | hdr = skb_put(skb, sizeof(*hdr)); |
1da177e4 LT |
1636 | pfkey_hdr_dup(hdr, orig); |
1637 | hdr->sadb_msg_errno = 0; | |
1638 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1639 | ||
1640 | if (auth_len) { | |
1641 | struct sadb_supported *sp; | |
1642 | struct sadb_alg *ap; | |
1643 | ||
4df864c1 | 1644 | sp = skb_put(skb, auth_len); |
1da177e4 LT |
1645 | ap = (struct sadb_alg *) (sp + 1); |
1646 | ||
1647 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1648 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1649 | ||
1650 | for (i = 0; ; i++) { | |
1651 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1652 | if (!aalg) | |
1653 | break; | |
7e50f84c JK |
1654 | if (!aalg->pfkey_supported) |
1655 | continue; | |
1da177e4 LT |
1656 | if (aalg->available) |
1657 | *ap++ = aalg->desc; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | if (enc_len) { | |
1662 | struct sadb_supported *sp; | |
1663 | struct sadb_alg *ap; | |
1664 | ||
4df864c1 | 1665 | sp = skb_put(skb, enc_len); |
1da177e4 LT |
1666 | ap = (struct sadb_alg *) (sp + 1); |
1667 | ||
1668 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1669 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1670 | ||
1671 | for (i = 0; ; i++) { | |
1672 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1673 | if (!ealg) | |
1674 | break; | |
7e50f84c JK |
1675 | if (!ealg->pfkey_supported) |
1676 | continue; | |
1da177e4 LT |
1677 | if (ealg->available) |
1678 | *ap++ = ealg->desc; | |
1679 | } | |
1680 | } | |
1681 | ||
1682 | out_put_algs: | |
1683 | return skb; | |
1684 | } | |
1685 | ||
4c93fbb0 | 1686 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1687 | { |
1688 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1689 | struct sk_buff *supp_skb; | |
1690 | ||
1691 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1692 | return -EINVAL; | |
1693 | ||
1694 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1695 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1696 | return -EEXIST; | |
1697 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1698 | } | |
1699 | ||
ba953a9d | 1700 | mutex_lock(&pfkey_mutex); |
1da177e4 | 1701 | xfrm_probe_algs(); |
8ff24541 | 1702 | |
9a564bcc | 1703 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO); |
ba953a9d HX |
1704 | mutex_unlock(&pfkey_mutex); |
1705 | ||
1da177e4 LT |
1706 | if (!supp_skb) { |
1707 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1708 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1709 | ||
1710 | return -ENOBUFS; | |
1711 | } | |
1712 | ||
36f41f8f ED |
1713 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, |
1714 | sock_net(sk)); | |
1da177e4 LT |
1715 | return 0; |
1716 | } | |
1717 | ||
4c93fbb0 | 1718 | static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr) |
8be987d7 JHS |
1719 | { |
1720 | struct sk_buff *skb; | |
1721 | struct sadb_msg *hdr; | |
1722 | ||
1723 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1724 | if (!skb) | |
1725 | return -ENOBUFS; | |
1726 | ||
59ae1d12 | 1727 | hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg)); |
8be987d7 JHS |
1728 | hdr->sadb_msg_errno = (uint8_t) 0; |
1729 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1730 | ||
36f41f8f ED |
1731 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, |
1732 | sock_net(sk)); | |
8be987d7 JHS |
1733 | } |
1734 | ||
214e005b | 1735 | static int key_notify_sa_flush(const struct km_event *c) |
26b15dad JHS |
1736 | { |
1737 | struct sk_buff *skb; | |
1738 | struct sadb_msg *hdr; | |
1739 | ||
1740 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1741 | if (!skb) | |
1742 | return -ENOBUFS; | |
4df864c1 | 1743 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
bf08867f | 1744 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1745 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad | 1746 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 1747 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
1748 | hdr->sadb_msg_version = PF_KEY_V2; |
1749 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1750 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
a5cc68f3 | 1751 | hdr->sadb_msg_reserved = 0; |
26b15dad | 1752 | |
36f41f8f | 1753 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad JHS |
1754 | |
1755 | return 0; | |
1756 | } | |
1757 | ||
4c93fbb0 | 1758 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1759 | { |
07fb0f17 | 1760 | struct net *net = sock_net(sk); |
95c96174 | 1761 | unsigned int proto; |
26b15dad | 1762 | struct km_event c; |
8be987d7 | 1763 | int err, err2; |
1da177e4 LT |
1764 | |
1765 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1766 | if (proto == 0) | |
1767 | return -EINVAL; | |
1768 | ||
f75a2804 | 1769 | err = xfrm_state_flush(net, proto, true, false); |
8be987d7 | 1770 | err2 = unicast_flush_resp(sk, hdr); |
9e64cc95 JHS |
1771 | if (err || err2) { |
1772 | if (err == -ESRCH) /* empty table - go quietly */ | |
1773 | err = 0; | |
8be987d7 | 1774 | return err ? err : err2; |
9e64cc95 | 1775 | } |
8be987d7 | 1776 | |
bf08867f | 1777 | c.data.proto = proto; |
26b15dad | 1778 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1779 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1780 | c.event = XFRM_MSG_FLUSHSA; |
07fb0f17 | 1781 | c.net = net; |
26b15dad | 1782 | km_state_notify(NULL, &c); |
1da177e4 LT |
1783 | |
1784 | return 0; | |
1785 | } | |
1786 | ||
1da177e4 LT |
1787 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1788 | { | |
83321d6b | 1789 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1790 | struct sk_buff *out_skb; |
1791 | struct sadb_msg *out_hdr; | |
1792 | ||
83321d6b TT |
1793 | if (!pfkey_can_dump(&pfk->sk)) |
1794 | return -ENOBUFS; | |
1795 | ||
050f009e | 1796 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1797 | if (IS_ERR(out_skb)) |
1798 | return PTR_ERR(out_skb); | |
1799 | ||
1800 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1801 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1802 | out_hdr->sadb_msg_type = SADB_DUMP; |
1803 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1804 | out_hdr->sadb_msg_errno = 0; | |
1805 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1806 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 1807 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
1808 | |
1809 | if (pfk->dump.skb) | |
36f41f8f | 1810 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 1811 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
1812 | pfk->dump.skb = out_skb; |
1813 | ||
1da177e4 LT |
1814 | return 0; |
1815 | } | |
1816 | ||
83321d6b TT |
1817 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1818 | { | |
07fb0f17 AD |
1819 | struct net *net = sock_net(&pfk->sk); |
1820 | return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); | |
83321d6b TT |
1821 | } |
1822 | ||
1823 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1824 | { | |
283bc9f3 FD |
1825 | struct net *net = sock_net(&pfk->sk); |
1826 | ||
1827 | xfrm_state_walk_done(&pfk->dump.u.state, net); | |
83321d6b TT |
1828 | } |
1829 | ||
4c93fbb0 | 1830 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1831 | { |
1832 | u8 proto; | |
870a2df4 | 1833 | struct xfrm_address_filter *filter = NULL; |
83321d6b TT |
1834 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1835 | ||
89e357d8 YS |
1836 | mutex_lock(&pfk->dump_lock); |
1837 | if (pfk->dump.dump != NULL) { | |
1838 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 1839 | return -EBUSY; |
89e357d8 | 1840 | } |
1da177e4 LT |
1841 | |
1842 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
89e357d8 YS |
1843 | if (proto == 0) { |
1844 | mutex_unlock(&pfk->dump_lock); | |
1da177e4 | 1845 | return -EINVAL; |
89e357d8 | 1846 | } |
1da177e4 | 1847 | |
d3623099 ND |
1848 | if (ext_hdrs[SADB_X_EXT_FILTER - 1]) { |
1849 | struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1]; | |
1850 | ||
37bd2242 MS |
1851 | if ((xfilter->sadb_x_filter_splen >= |
1852 | (sizeof(xfrm_address_t) << 3)) || | |
1853 | (xfilter->sadb_x_filter_dplen >= | |
1854 | (sizeof(xfrm_address_t) << 3))) { | |
1855 | mutex_unlock(&pfk->dump_lock); | |
1856 | return -EINVAL; | |
1857 | } | |
d3623099 | 1858 | filter = kmalloc(sizeof(*filter), GFP_KERNEL); |
89e357d8 YS |
1859 | if (filter == NULL) { |
1860 | mutex_unlock(&pfk->dump_lock); | |
d3623099 | 1861 | return -ENOMEM; |
89e357d8 | 1862 | } |
d3623099 ND |
1863 | |
1864 | memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr, | |
1865 | sizeof(xfrm_address_t)); | |
1866 | memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr, | |
1867 | sizeof(xfrm_address_t)); | |
1868 | filter->family = xfilter->sadb_x_filter_family; | |
1869 | filter->splen = xfilter->sadb_x_filter_splen; | |
1870 | filter->dplen = xfilter->sadb_x_filter_dplen; | |
1871 | } | |
1872 | ||
83321d6b | 1873 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 1874 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
1875 | pfk->dump.dump = pfkey_dump_sa; |
1876 | pfk->dump.done = pfkey_dump_sa_done; | |
d3623099 | 1877 | xfrm_state_walk_init(&pfk->dump.u.state, proto, filter); |
89e357d8 | 1878 | mutex_unlock(&pfk->dump_lock); |
4c563f76 | 1879 | |
83321d6b | 1880 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1881 | } |
1882 | ||
4c93fbb0 | 1883 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1884 | { |
1885 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1886 | int satype = hdr->sadb_msg_satype; | |
4c93fbb0 | 1887 | bool reset_errno = false; |
1da177e4 LT |
1888 | |
1889 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
4c93fbb0 | 1890 | reset_errno = true; |
1da177e4 LT |
1891 | if (satype != 0 && satype != 1) |
1892 | return -EINVAL; | |
1893 | pfk->promisc = satype; | |
1894 | } | |
4c93fbb0 DM |
1895 | if (reset_errno && skb_cloned(skb)) |
1896 | skb = skb_copy(skb, GFP_KERNEL); | |
1897 | else | |
1898 | skb = skb_clone(skb, GFP_KERNEL); | |
1899 | ||
1900 | if (reset_errno && skb) { | |
1901 | struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data; | |
1902 | new_hdr->sadb_msg_errno = 0; | |
1903 | } | |
1904 | ||
36f41f8f | 1905 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk)); |
1da177e4 LT |
1906 | return 0; |
1907 | } | |
1908 | ||
1909 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1910 | { | |
1911 | int i; | |
1912 | u32 reqid = *(u32*)ptr; | |
1913 | ||
1914 | for (i=0; i<xp->xfrm_nr; i++) { | |
1915 | if (xp->xfrm_vec[i].reqid == reqid) | |
1916 | return -EEXIST; | |
1917 | } | |
1918 | return 0; | |
1919 | } | |
1920 | ||
07fb0f17 | 1921 | static u32 gen_reqid(struct net *net) |
1da177e4 | 1922 | { |
4c563f76 | 1923 | struct xfrm_policy_walk walk; |
1da177e4 | 1924 | u32 start; |
4c563f76 | 1925 | int rc; |
1da177e4 LT |
1926 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1927 | ||
1928 | start = reqid; | |
1929 | do { | |
1930 | ++reqid; | |
1931 | if (reqid == 0) | |
1932 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 | 1933 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f17 | 1934 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
283bc9f3 | 1935 | xfrm_policy_walk_done(&walk, net); |
4c563f76 | 1936 | if (rc != -EEXIST) |
1da177e4 LT |
1937 | return reqid; |
1938 | } while (reqid != start); | |
1939 | return 0; | |
1940 | } | |
1941 | ||
1942 | static int | |
1943 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1944 | { | |
07fb0f17 | 1945 | struct net *net = xp_net(xp); |
1da177e4 | 1946 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce2 | 1947 | int mode; |
1da177e4 LT |
1948 | |
1949 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1950 | return -ELOOP; | |
1951 | ||
1952 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1953 | return -EINVAL; | |
dbb2483b CW |
1954 | if (!xfrm_id_proto_valid(rq->sadb_x_ipsecrequest_proto)) |
1955 | return -EINVAL; | |
1da177e4 | 1956 | |
dbb2483b | 1957 | t->id.proto = rq->sadb_x_ipsecrequest_proto; |
55569ce2 KM |
1958 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1959 | return -EINVAL; | |
1960 | t->mode = mode; | |
1da177e4 LT |
1961 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1962 | t->optional = 1; | |
1963 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1964 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1965 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1966 | t->reqid = 0; | |
07fb0f17 | 1967 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4 LT |
1968 | return -ENOBUFS; |
1969 | } | |
1970 | ||
1971 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1972 | if (t->mode == XFRM_MODE_TUNNEL) { |
096f41d3 | 1973 | int err; |
5f95ac91 | 1974 | |
096f41d3 HX |
1975 | err = parse_sockaddr_pair( |
1976 | (struct sockaddr *)(rq + 1), | |
1977 | rq->sadb_x_ipsecrequest_len - sizeof(*rq), | |
1978 | &t->saddr, &t->id.daddr, &t->encap_family); | |
1979 | if (err) | |
1980 | return err; | |
2718aa7c MK |
1981 | } else |
1982 | t->encap_family = xp->family; | |
1983 | ||
1da177e4 | 1984 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1985 | t->allalgs = 1; |
1da177e4 LT |
1986 | xp->xfrm_nr++; |
1987 | return 0; | |
1988 | } | |
1989 | ||
1990 | static int | |
1991 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1992 | { | |
1993 | int err; | |
1994 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1995 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1996 | ||
f674e72f DC |
1997 | if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy)) |
1998 | return -EINVAL; | |
1999 | ||
096f41d3 HX |
2000 | while (len >= sizeof(*rq)) { |
2001 | if (len < rq->sadb_x_ipsecrequest_len || | |
2002 | rq->sadb_x_ipsecrequest_len < sizeof(*rq)) | |
2003 | return -EINVAL; | |
2004 | ||
1da177e4 LT |
2005 | if ((err = parse_ipsecrequest(xp, rq)) < 0) |
2006 | return err; | |
2007 | len -= rq->sadb_x_ipsecrequest_len; | |
2008 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
2009 | } | |
2010 | return 0; | |
2011 | } | |
2012 | ||
4c93fbb0 | 2013 | static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp) |
df71837d | 2014 | { |
4fc735d9 | 2015 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; |
df71837d TJ |
2016 | |
2017 | if (xfrm_ctx) { | |
2018 | int len = sizeof(struct sadb_x_sec_ctx); | |
2019 | len += xfrm_ctx->ctx_len; | |
2020 | return PFKEY_ALIGN8(len); | |
2021 | } | |
2022 | return 0; | |
2023 | } | |
2024 | ||
4c93fbb0 | 2025 | static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp) |
1da177e4 | 2026 | { |
4c93fbb0 | 2027 | const struct xfrm_tmpl *t; |
1da177e4 | 2028 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
2029 | int socklen = 0; |
2030 | int i; | |
2031 | ||
2032 | for (i=0; i<xp->xfrm_nr; i++) { | |
2033 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 2034 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 2035 | } |
1da177e4 LT |
2036 | |
2037 | return sizeof(struct sadb_msg) + | |
2038 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 2039 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
2040 | (sockaddr_size * 2) + |
2041 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
2042 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
2043 | (socklen * 2) + | |
df71837d | 2044 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
2045 | } |
2046 | ||
4c93fbb0 | 2047 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp) |
1da177e4 LT |
2048 | { |
2049 | struct sk_buff *skb; | |
2050 | int size; | |
2051 | ||
2052 | size = pfkey_xfrm_policy2msg_size(xp); | |
2053 | ||
2054 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
2055 | if (skb == NULL) | |
2056 | return ERR_PTR(-ENOBUFS); | |
2057 | ||
2058 | return skb; | |
2059 | } | |
2060 | ||
4c93fbb0 | 2061 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir) |
1da177e4 LT |
2062 | { |
2063 | struct sadb_msg *hdr; | |
2064 | struct sadb_address *addr; | |
2065 | struct sadb_lifetime *lifetime; | |
2066 | struct sadb_x_policy *pol; | |
df71837d TJ |
2067 | struct sadb_x_sec_ctx *sec_ctx; |
2068 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
2069 | int i; |
2070 | int size; | |
2071 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 2072 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
2073 | |
2074 | size = pfkey_xfrm_policy2msg_size(xp); | |
2075 | ||
2076 | /* call should fill header later */ | |
4df864c1 | 2077 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
2078 | memset(hdr, 0, size); /* XXX do we need this ? */ |
2079 | ||
2080 | /* src address */ | |
4df864c1 | 2081 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 2082 | addr->sadb_address_len = |
1da177e4 LT |
2083 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2084 | sizeof(uint64_t); | |
2085 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2086 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
2087 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
2088 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2089 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2090 | xp->selector.sport, | |
2091 | (struct sockaddr *) (addr + 1), | |
2092 | xp->family)) | |
1da177e4 LT |
2093 | BUG(); |
2094 | ||
2095 | /* dst address */ | |
4df864c1 | 2096 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
2097 | addr->sadb_address_len = |
2098 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2099 | sizeof(uint64_t); | |
2100 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2101 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2102 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2103 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2104 | |
2105 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2106 | (struct sockaddr *) (addr + 1), | |
2107 | xp->family); | |
1da177e4 LT |
2108 | |
2109 | /* hard time */ | |
4df864c1 | 2110 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2111 | lifetime->sadb_lifetime_len = |
2112 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2113 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2114 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2115 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2116 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2117 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2118 | /* soft time */ | |
4df864c1 | 2119 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2120 | lifetime->sadb_lifetime_len = |
2121 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2122 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2123 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2124 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2125 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2126 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2127 | /* current time */ | |
4df864c1 | 2128 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2129 | lifetime->sadb_lifetime_len = |
2130 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2131 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2132 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2133 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2134 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2135 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2136 | ||
4df864c1 | 2137 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
2138 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
2139 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2140 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2141 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2142 | if (xp->xfrm_nr) | |
2143 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2144 | else | |
2145 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2146 | } | |
2147 | pol->sadb_x_policy_dir = dir+1; | |
ff862a46 | 2148 | pol->sadb_x_policy_reserved = 0; |
1da177e4 LT |
2149 | pol->sadb_x_policy_id = xp->index; |
2150 | pol->sadb_x_policy_priority = xp->priority; | |
2151 | ||
2152 | for (i=0; i<xp->xfrm_nr; i++) { | |
4c93fbb0 | 2153 | const struct xfrm_tmpl *t = xp->xfrm_vec + i; |
1da177e4 | 2154 | struct sadb_x_ipsecrequest *rq; |
1da177e4 | 2155 | int req_size; |
55569ce2 | 2156 | int mode; |
1da177e4 LT |
2157 | |
2158 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2159 | if (t->mode == XFRM_MODE_TUNNEL) { |
2160 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2161 | req_size += socklen * 2; | |
2162 | } else { | |
1da177e4 | 2163 | size -= 2*socklen; |
e5b56652 | 2164 | } |
4df864c1 | 2165 | rq = skb_put(skb, req_size); |
1da177e4 LT |
2166 | pol->sadb_x_policy_len += req_size/8; |
2167 | memset(rq, 0, sizeof(*rq)); | |
2168 | rq->sadb_x_ipsecrequest_len = req_size; | |
2169 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2170 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2171 | return -EINVAL; | |
fefaa75e | 2172 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2173 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2174 | if (t->reqid) | |
2175 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2176 | if (t->optional) | |
2177 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2178 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2179 | |
7e49e6de | 2180 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2181 | u8 *sa = (void *)(rq + 1); |
2182 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2183 | (struct sockaddr *)sa, | |
2184 | t->encap_family); | |
2185 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2186 | (struct sockaddr *) (sa + socklen), | |
2187 | t->encap_family); | |
1da177e4 LT |
2188 | } |
2189 | } | |
df71837d TJ |
2190 | |
2191 | /* security context */ | |
2192 | if ((xfrm_ctx = xp->security)) { | |
2193 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2194 | ||
4df864c1 | 2195 | sec_ctx = skb_put(skb, ctx_size); |
df71837d TJ |
2196 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); |
2197 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2198 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2199 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2200 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2201 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2202 | xfrm_ctx->ctx_len); | |
2203 | } | |
2204 | ||
1da177e4 | 2205 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
850a6212 | 2206 | hdr->sadb_msg_reserved = refcount_read(&xp->refcnt); |
55569ce2 KM |
2207 | |
2208 | return 0; | |
1da177e4 LT |
2209 | } |
2210 | ||
214e005b | 2211 | static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2212 | { |
2213 | struct sk_buff *out_skb; | |
2214 | struct sadb_msg *out_hdr; | |
2215 | int err; | |
2216 | ||
2217 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
9a127aad DC |
2218 | if (IS_ERR(out_skb)) |
2219 | return PTR_ERR(out_skb); | |
2220 | ||
55569ce2 | 2221 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
1e532d2b SK |
2222 | if (err < 0) { |
2223 | kfree_skb(out_skb); | |
55569ce2 | 2224 | return err; |
1e532d2b | 2225 | } |
26b15dad JHS |
2226 | |
2227 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2228 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2229 | ||
f60f6b8f | 2230 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2231 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2232 | else | |
2233 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2234 | out_hdr->sadb_msg_errno = 0; | |
2235 | out_hdr->sadb_msg_seq = c->seq; | |
15e47304 | 2236 | out_hdr->sadb_msg_pid = c->portid; |
36f41f8f | 2237 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad JHS |
2238 | return 0; |
2239 | ||
2240 | } | |
2241 | ||
4c93fbb0 | 2242 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2243 | { |
07fb0f17 | 2244 | struct net *net = sock_net(sk); |
df71837d | 2245 | int err = 0; |
1da177e4 LT |
2246 | struct sadb_lifetime *lifetime; |
2247 | struct sadb_address *sa; | |
2248 | struct sadb_x_policy *pol; | |
2249 | struct xfrm_policy *xp; | |
26b15dad | 2250 | struct km_event c; |
df71837d | 2251 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2252 | |
2253 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2254 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2255 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2256 | return -EINVAL; | |
2257 | ||
2258 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2259 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2260 | return -EINVAL; | |
2261 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2262 | return -EINVAL; | |
2263 | ||
07fb0f17 | 2264 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2265 | if (xp == NULL) |
2266 | return -ENOBUFS; | |
2267 | ||
2268 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2269 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2270 | xp->priority = pol->sadb_x_policy_priority; | |
2271 | ||
d0d79c3f | 2272 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 | 2273 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
1da177e4 LT |
2274 | xp->selector.family = xp->family; |
2275 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2276 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2277 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2278 | if (xp->selector.sport) | |
8f83f23e | 2279 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2280 | |
d0d79c3f | 2281 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2282 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2283 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2284 | ||
2285 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2286 | * in both addresses. | |
2287 | */ | |
2288 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2289 | ||
2290 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2291 | if (xp->selector.dport) | |
8f83f23e | 2292 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2293 | |
ea110733 | 2294 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2295 | if (sec_ctx != NULL) { |
87536a81 | 2296 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2297 | |
2298 | if (!uctx) { | |
2299 | err = -ENOBUFS; | |
2300 | goto out; | |
2301 | } | |
2302 | ||
52a4c640 | 2303 | err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL); |
df71837d TJ |
2304 | kfree(uctx); |
2305 | ||
2306 | if (err) | |
2307 | goto out; | |
2308 | } | |
2309 | ||
1da177e4 LT |
2310 | xp->lft.soft_byte_limit = XFRM_INF; |
2311 | xp->lft.hard_byte_limit = XFRM_INF; | |
2312 | xp->lft.soft_packet_limit = XFRM_INF; | |
2313 | xp->lft.hard_packet_limit = XFRM_INF; | |
2314 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2315 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2316 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2317 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2318 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2319 | } | |
2320 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2321 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2322 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2323 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2324 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2325 | } | |
2326 | xp->xfrm_nr = 0; | |
2327 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2328 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2329 | goto out; | |
2330 | ||
1da177e4 LT |
2331 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2332 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2333 | |
2e71029e | 2334 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 2335 | |
df71837d TJ |
2336 | if (err) |
2337 | goto out; | |
1da177e4 | 2338 | |
26b15dad | 2339 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2340 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2341 | else |
f60f6b8f | 2342 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2343 | |
26b15dad | 2344 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2345 | c.portid = hdr->sadb_msg_pid; |
1da177e4 | 2346 | |
26b15dad JHS |
2347 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2348 | xfrm_pol_put(xp); | |
1da177e4 LT |
2349 | return 0; |
2350 | ||
2351 | out: | |
12a169e7 | 2352 | xp->walk.dead = 1; |
64c31b3f | 2353 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2354 | return err; |
2355 | } | |
2356 | ||
4c93fbb0 | 2357 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2358 | { |
07fb0f17 | 2359 | struct net *net = sock_net(sk); |
1da177e4 LT |
2360 | int err; |
2361 | struct sadb_address *sa; | |
2362 | struct sadb_x_policy *pol; | |
03e1ad7b | 2363 | struct xfrm_policy *xp; |
1da177e4 | 2364 | struct xfrm_selector sel; |
26b15dad | 2365 | struct km_event c; |
df71837d | 2366 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2367 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2368 | |
2369 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2370 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2371 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2372 | return -EINVAL; | |
2373 | ||
2374 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2375 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2376 | return -EINVAL; | |
2377 | ||
2378 | memset(&sel, 0, sizeof(sel)); | |
2379 | ||
d0d79c3f | 2380 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 LT |
2381 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2382 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2383 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2384 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2385 | if (sel.sport) | |
8f83f23e | 2386 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2387 | |
d0d79c3f | 2388 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2389 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2390 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2391 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2392 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2393 | if (sel.dport) | |
8f83f23e | 2394 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2395 | |
ea110733 | 2396 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2397 | if (sec_ctx != NULL) { |
87536a81 | 2398 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2399 | |
2400 | if (!uctx) | |
2401 | return -ENOMEM; | |
2402 | ||
52a4c640 | 2403 | err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL); |
df71837d | 2404 | kfree(uctx); |
df71837d TJ |
2405 | if (err) |
2406 | return err; | |
2db3e47e | 2407 | } |
161a09e7 | 2408 | |
4f47e8ab | 2409 | xp = xfrm_policy_bysel_ctx(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b PM |
2410 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2411 | 1, &err); | |
2412 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2413 | if (xp == NULL) |
2414 | return -ENOENT; | |
2415 | ||
2e71029e | 2416 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
2417 | |
2418 | if (err) | |
c8c05a8e | 2419 | goto out; |
13fcfbb0 | 2420 | |
26b15dad | 2421 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2422 | c.portid = hdr->sadb_msg_pid; |
1839faab | 2423 | c.data.byid = 0; |
f60f6b8f | 2424 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2425 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2426 | ||
c8c05a8e | 2427 | out: |
26b15dad JHS |
2428 | xfrm_pol_put(xp); |
2429 | return err; | |
2430 | } | |
2431 | ||
4c93fbb0 | 2432 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir) |
26b15dad JHS |
2433 | { |
2434 | int err; | |
2435 | struct sk_buff *out_skb; | |
2436 | struct sadb_msg *out_hdr; | |
2437 | err = 0; | |
2438 | ||
1da177e4 LT |
2439 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2440 | if (IS_ERR(out_skb)) { | |
2441 | err = PTR_ERR(out_skb); | |
2442 | goto out; | |
2443 | } | |
55569ce2 | 2444 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
7c80eb1c JS |
2445 | if (err < 0) { |
2446 | kfree_skb(out_skb); | |
55569ce2 | 2447 | goto out; |
7c80eb1c | 2448 | } |
1da177e4 LT |
2449 | |
2450 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2451 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2452 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2453 | out_hdr->sadb_msg_satype = 0; |
2454 | out_hdr->sadb_msg_errno = 0; | |
2455 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2456 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 2457 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4 LT |
2458 | err = 0; |
2459 | ||
2460 | out: | |
1da177e4 LT |
2461 | return err; |
2462 | } | |
2463 | ||
08de61be SS |
2464 | static int pfkey_sockaddr_pair_size(sa_family_t family) |
2465 | { | |
9e8b4ed8 | 2466 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2467 | } |
2468 | ||
13c1d189 | 2469 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2470 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2471 | u16 *family) | |
2472 | { | |
5f95ac91 YH |
2473 | int af, socklen; |
2474 | ||
096f41d3 | 2475 | if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2476 | return -EINVAL; |
2477 | ||
13c1d189 | 2478 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2479 | if (!af) |
2480 | return -EINVAL; | |
2481 | ||
2482 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2483 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2484 | daddr) != af) |
08de61be | 2485 | return -EINVAL; |
08de61be | 2486 | |
5f95ac91 | 2487 | *family = af; |
08de61be SS |
2488 | return 0; |
2489 | } | |
2490 | ||
096f41d3 | 2491 | #ifdef CONFIG_NET_KEY_MIGRATE |
08de61be SS |
2492 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, |
2493 | struct xfrm_migrate *m) | |
2494 | { | |
2495 | int err; | |
2496 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2497 | int mode; |
08de61be | 2498 | |
096f41d3 HX |
2499 | if (len < sizeof(*rq1) || |
2500 | len < rq1->sadb_x_ipsecrequest_len || | |
2501 | rq1->sadb_x_ipsecrequest_len < sizeof(*rq1)) | |
08de61be SS |
2502 | return -EINVAL; |
2503 | ||
2504 | /* old endoints */ | |
13c1d189 | 2505 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
096f41d3 | 2506 | rq1->sadb_x_ipsecrequest_len - sizeof(*rq1), |
13c1d189 | 2507 | &m->old_saddr, &m->old_daddr, |
08de61be SS |
2508 | &m->old_family); |
2509 | if (err) | |
2510 | return err; | |
2511 | ||
2512 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2513 | len -= rq1->sadb_x_ipsecrequest_len; | |
2514 | ||
096f41d3 HX |
2515 | if (len <= sizeof(*rq2) || |
2516 | len < rq2->sadb_x_ipsecrequest_len || | |
2517 | rq2->sadb_x_ipsecrequest_len < sizeof(*rq2)) | |
08de61be SS |
2518 | return -EINVAL; |
2519 | ||
2520 | /* new endpoints */ | |
13c1d189 | 2521 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
096f41d3 | 2522 | rq2->sadb_x_ipsecrequest_len - sizeof(*rq2), |
13c1d189 | 2523 | &m->new_saddr, &m->new_daddr, |
08de61be SS |
2524 | &m->new_family); |
2525 | if (err) | |
2526 | return err; | |
2527 | ||
2528 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2529 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2530 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2531 | return -EINVAL; | |
2532 | ||
2533 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2534 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2535 | return -EINVAL; | |
2536 | m->mode = mode; | |
08de61be SS |
2537 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2538 | ||
2539 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2540 | rq2->sadb_x_ipsecrequest_len)); | |
2541 | } | |
2542 | ||
2543 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2544 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2545 | { |
2546 | int i, len, ret, err = -EINVAL; | |
2547 | u8 dir; | |
2548 | struct sadb_address *sa; | |
13c1d189 | 2549 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2550 | struct sadb_x_policy *pol; |
2551 | struct sadb_x_ipsecrequest *rq; | |
2552 | struct xfrm_selector sel; | |
2553 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2554 | struct xfrm_kmaddress k; |
8d549c4f | 2555 | struct net *net = sock_net(sk); |
08de61be SS |
2556 | |
2557 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2558 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2559 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2560 | err = -EINVAL; | |
2561 | goto out; | |
2562 | } | |
2563 | ||
13c1d189 | 2564 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2565 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2566 | |
2567 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2568 | err = -EINVAL; | |
2569 | goto out; | |
2570 | } | |
2571 | ||
13c1d189 AE |
2572 | if (kma) { |
2573 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2574 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2575 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2576 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2577 | &k.local, &k.remote, &k.family); | |
2578 | if (ret < 0) { | |
2579 | err = ret; | |
2580 | goto out; | |
2581 | } | |
2582 | } | |
2583 | ||
08de61be SS |
2584 | dir = pol->sadb_x_policy_dir - 1; |
2585 | memset(&sel, 0, sizeof(sel)); | |
2586 | ||
2587 | /* set source address info of selector */ | |
2588 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2589 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2590 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2591 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2592 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2593 | if (sel.sport) | |
582ee43d | 2594 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2595 | |
2596 | /* set destination address info of selector */ | |
47162c0b | 2597 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
08de61be SS |
2598 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2599 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2600 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2601 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2602 | if (sel.dport) | |
582ee43d | 2603 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2604 | |
2605 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2606 | ||
2607 | /* extract ipsecrequests */ | |
2608 | i = 0; | |
2609 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2610 | ||
2611 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2612 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2613 | if (ret < 0) { | |
2614 | err = ret; | |
2615 | goto out; | |
2616 | } else { | |
2617 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2618 | len -= ret; | |
2619 | i++; | |
2620 | } | |
2621 | } | |
2622 | ||
2623 | if (!i || len > 0) { | |
2624 | err = -EINVAL; | |
2625 | goto out; | |
2626 | } | |
2627 | ||
13c1d189 | 2628 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
c1aca308 | 2629 | kma ? &k : NULL, net, NULL, 0); |
08de61be SS |
2630 | |
2631 | out: | |
2632 | return err; | |
2633 | } | |
2634 | #else | |
2635 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
7f6daa63 | 2636 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2637 | { |
2638 | return -ENOPROTOOPT; | |
2639 | } | |
2640 | #endif | |
2641 | ||
2642 | ||
4c93fbb0 | 2643 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2644 | { |
07fb0f17 | 2645 | struct net *net = sock_net(sk); |
77d8d7a6 | 2646 | unsigned int dir; |
215a2dd3 | 2647 | int err = 0, delete; |
1da177e4 LT |
2648 | struct sadb_x_policy *pol; |
2649 | struct xfrm_policy *xp; | |
26b15dad | 2650 | struct km_event c; |
1da177e4 LT |
2651 | |
2652 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2653 | return -EINVAL; | |
2654 | ||
77d8d7a6 HX |
2655 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2656 | if (dir >= XFRM_POLICY_MAX) | |
2657 | return -EINVAL; | |
2658 | ||
215a2dd3 | 2659 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
4f47e8ab | 2660 | xp = xfrm_policy_byid(net, &dummy_mark, 0, XFRM_POLICY_TYPE_MAIN, |
bd55775c | 2661 | dir, pol->sadb_x_policy_id, delete, &err); |
1da177e4 LT |
2662 | if (xp == NULL) |
2663 | return -ENOENT; | |
2664 | ||
215a2dd3 | 2665 | if (delete) { |
2e71029e | 2666 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
1da177e4 | 2667 | |
215a2dd3 EP |
2668 | if (err) |
2669 | goto out; | |
2670 | c.seq = hdr->sadb_msg_seq; | |
15e47304 | 2671 | c.portid = hdr->sadb_msg_pid; |
bf08867f | 2672 | c.data.byid = 1; |
f60f6b8f | 2673 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2674 | km_policy_notify(xp, dir, &c); |
26b15dad | 2675 | } else { |
77d8d7a6 | 2676 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2677 | } |
1da177e4 | 2678 | |
215a2dd3 | 2679 | out: |
1da177e4 LT |
2680 | xfrm_pol_put(xp); |
2681 | return err; | |
2682 | } | |
2683 | ||
2684 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2685 | { | |
83321d6b | 2686 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2687 | struct sk_buff *out_skb; |
2688 | struct sadb_msg *out_hdr; | |
55569ce2 | 2689 | int err; |
1da177e4 | 2690 | |
83321d6b TT |
2691 | if (!pfkey_can_dump(&pfk->sk)) |
2692 | return -ENOBUFS; | |
2693 | ||
1da177e4 LT |
2694 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2695 | if (IS_ERR(out_skb)) | |
2696 | return PTR_ERR(out_skb); | |
2697 | ||
55569ce2 | 2698 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
7c80eb1c JS |
2699 | if (err < 0) { |
2700 | kfree_skb(out_skb); | |
55569ce2 | 2701 | return err; |
7c80eb1c | 2702 | } |
1da177e4 LT |
2703 | |
2704 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2705 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2706 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2707 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2708 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2709 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 2710 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
2711 | |
2712 | if (pfk->dump.skb) | |
36f41f8f | 2713 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 2714 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
2715 | pfk->dump.skb = out_skb; |
2716 | ||
1da177e4 LT |
2717 | return 0; |
2718 | } | |
2719 | ||
83321d6b TT |
2720 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2721 | { | |
07fb0f17 AD |
2722 | struct net *net = sock_net(&pfk->sk); |
2723 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); | |
83321d6b TT |
2724 | } |
2725 | ||
2726 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2727 | { | |
283bc9f3 FD |
2728 | struct net *net = sock_net((struct sock *)pfk); |
2729 | ||
2730 | xfrm_policy_walk_done(&pfk->dump.u.policy, net); | |
83321d6b TT |
2731 | } |
2732 | ||
4c93fbb0 | 2733 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2734 | { |
83321d6b | 2735 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2736 | |
89e357d8 YS |
2737 | mutex_lock(&pfk->dump_lock); |
2738 | if (pfk->dump.dump != NULL) { | |
2739 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 2740 | return -EBUSY; |
89e357d8 | 2741 | } |
1da177e4 | 2742 | |
83321d6b | 2743 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 2744 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
2745 | pfk->dump.dump = pfkey_dump_sp; |
2746 | pfk->dump.done = pfkey_dump_sp_done; | |
2747 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
89e357d8 | 2748 | mutex_unlock(&pfk->dump_lock); |
83321d6b TT |
2749 | |
2750 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2751 | } |
2752 | ||
214e005b | 2753 | static int key_notify_policy_flush(const struct km_event *c) |
1da177e4 LT |
2754 | { |
2755 | struct sk_buff *skb_out; | |
26b15dad | 2756 | struct sadb_msg *hdr; |
1da177e4 | 2757 | |
26b15dad | 2758 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2759 | if (!skb_out) |
2760 | return -ENOBUFS; | |
4df864c1 | 2761 | hdr = skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2762 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad | 2763 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 2764 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
2765 | hdr->sadb_msg_version = PF_KEY_V2; |
2766 | hdr->sadb_msg_errno = (uint8_t) 0; | |
85dfb745 | 2767 | hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; |
26b15dad | 2768 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
a5cc68f3 | 2769 | hdr->sadb_msg_reserved = 0; |
36f41f8f | 2770 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad | 2771 | return 0; |
1da177e4 | 2772 | |
26b15dad JHS |
2773 | } |
2774 | ||
4c93fbb0 | 2775 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
26b15dad | 2776 | { |
07fb0f17 | 2777 | struct net *net = sock_net(sk); |
26b15dad | 2778 | struct km_event c; |
8be987d7 | 2779 | int err, err2; |
1da177e4 | 2780 | |
2e71029e | 2781 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true); |
8be987d7 | 2782 | err2 = unicast_flush_resp(sk, hdr); |
2f1eb65f JHS |
2783 | if (err || err2) { |
2784 | if (err == -ESRCH) /* empty table - old silent behavior */ | |
2785 | return 0; | |
2786 | return err; | |
2787 | } | |
8be987d7 | 2788 | |
f7b6983f | 2789 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2790 | c.event = XFRM_MSG_FLUSHPOLICY; |
15e47304 | 2791 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 2792 | c.seq = hdr->sadb_msg_seq; |
07fb0f17 | 2793 | c.net = net; |
26b15dad | 2794 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
2795 | |
2796 | return 0; | |
2797 | } | |
2798 | ||
2799 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2800 | const struct sadb_msg *hdr, void * const *ext_hdrs); |
8603b955 | 2801 | static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
1da177e4 LT |
2802 | [SADB_RESERVED] = pfkey_reserved, |
2803 | [SADB_GETSPI] = pfkey_getspi, | |
2804 | [SADB_UPDATE] = pfkey_add, | |
2805 | [SADB_ADD] = pfkey_add, | |
2806 | [SADB_DELETE] = pfkey_delete, | |
2807 | [SADB_GET] = pfkey_get, | |
2808 | [SADB_ACQUIRE] = pfkey_acquire, | |
2809 | [SADB_REGISTER] = pfkey_register, | |
2810 | [SADB_EXPIRE] = NULL, | |
2811 | [SADB_FLUSH] = pfkey_flush, | |
2812 | [SADB_DUMP] = pfkey_dump, | |
2813 | [SADB_X_PROMISC] = pfkey_promisc, | |
2814 | [SADB_X_PCHANGE] = NULL, | |
2815 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2816 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2817 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2818 | [SADB_X_SPDGET] = pfkey_spdget, | |
2819 | [SADB_X_SPDACQUIRE] = NULL, | |
2820 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2821 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2822 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2823 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2824 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2825 | }; |
2826 | ||
4c93fbb0 | 2827 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr) |
1da177e4 LT |
2828 | { |
2829 | void *ext_hdrs[SADB_EXT_MAX]; | |
2830 | int err; | |
2831 | ||
9c90c9b3 MK |
2832 | /* Non-zero return value of pfkey_broadcast() does not always signal |
2833 | * an error and even on an actual error we may still want to process | |
2834 | * the message so rather ignore the return value. | |
2835 | */ | |
2836 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
2837 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); | |
1da177e4 LT |
2838 | |
2839 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2840 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2841 | if (!err) { | |
2842 | err = -EOPNOTSUPP; | |
2843 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2844 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2845 | } | |
2846 | return err; | |
2847 | } | |
2848 | ||
2849 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2850 | { | |
2851 | struct sadb_msg *hdr = NULL; | |
2852 | ||
2853 | if (skb->len < sizeof(*hdr)) { | |
2854 | *errp = -EMSGSIZE; | |
2855 | } else { | |
2856 | hdr = (struct sadb_msg *) skb->data; | |
2857 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2858 | hdr->sadb_msg_reserved != 0 || | |
2859 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2860 | hdr->sadb_msg_type > SADB_MAX)) { | |
2861 | hdr = NULL; | |
2862 | *errp = -EINVAL; | |
2863 | } else if (hdr->sadb_msg_len != (skb->len / | |
2864 | sizeof(uint64_t)) || | |
2865 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2866 | sizeof(uint64_t))) { | |
2867 | hdr = NULL; | |
2868 | *errp = -EMSGSIZE; | |
2869 | } else { | |
2870 | *errp = 0; | |
2871 | } | |
2872 | } | |
2873 | return hdr; | |
2874 | } | |
2875 | ||
4c93fbb0 DM |
2876 | static inline int aalg_tmpl_set(const struct xfrm_tmpl *t, |
2877 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2878 | { |
f398035f HX |
2879 | unsigned int id = d->desc.sadb_alg_id; |
2880 | ||
2881 | if (id >= sizeof(t->aalgos) * 8) | |
2882 | return 0; | |
2883 | ||
2884 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2885 | } |
2886 | ||
4c93fbb0 DM |
2887 | static inline int ealg_tmpl_set(const struct xfrm_tmpl *t, |
2888 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2889 | { |
f398035f HX |
2890 | unsigned int id = d->desc.sadb_alg_id; |
2891 | ||
2892 | if (id >= sizeof(t->ealgos) * 8) | |
2893 | return 0; | |
2894 | ||
2895 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2896 | } |
2897 | ||
4c93fbb0 | 2898 | static int count_ah_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2899 | { |
2900 | int i, sz = 0; | |
2901 | ||
2902 | for (i = 0; ; i++) { | |
4c93fbb0 | 2903 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2904 | if (!aalg) |
2905 | break; | |
7e50f84c JK |
2906 | if (!aalg->pfkey_supported) |
2907 | continue; | |
015c44d7 | 2908 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
1da177e4 LT |
2909 | sz += sizeof(struct sadb_comb); |
2910 | } | |
2911 | return sz + sizeof(struct sadb_prop); | |
2912 | } | |
2913 | ||
4c93fbb0 | 2914 | static int count_esp_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2915 | { |
2916 | int i, k, sz = 0; | |
2917 | ||
2918 | for (i = 0; ; i++) { | |
4c93fbb0 | 2919 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2920 | if (!ealg) |
2921 | break; | |
8ff24541 | 2922 | |
7e50f84c JK |
2923 | if (!ealg->pfkey_supported) |
2924 | continue; | |
2925 | ||
015c44d7 | 2926 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
1da177e4 | 2927 | continue; |
8ff24541 | 2928 | |
1da177e4 | 2929 | for (k = 1; ; k++) { |
4c93fbb0 | 2930 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2931 | if (!aalg) |
2932 | break; | |
8ff24541 | 2933 | |
7e50f84c JK |
2934 | if (!aalg->pfkey_supported) |
2935 | continue; | |
2936 | ||
015c44d7 | 2937 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
1da177e4 LT |
2938 | sz += sizeof(struct sadb_comb); |
2939 | } | |
2940 | } | |
2941 | return sz + sizeof(struct sadb_prop); | |
2942 | } | |
2943 | ||
4c93fbb0 | 2944 | static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2945 | { |
2946 | struct sadb_prop *p; | |
2947 | int i; | |
2948 | ||
4df864c1 | 2949 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2950 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2951 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2952 | p->sadb_prop_replay = 32; | |
2953 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2954 | ||
2955 | for (i = 0; ; i++) { | |
4c93fbb0 | 2956 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2957 | if (!aalg) |
2958 | break; | |
2959 | ||
7e50f84c JK |
2960 | if (!aalg->pfkey_supported) |
2961 | continue; | |
2962 | ||
1da177e4 LT |
2963 | if (aalg_tmpl_set(t, aalg) && aalg->available) { |
2964 | struct sadb_comb *c; | |
b080db58 | 2965 | c = skb_put_zero(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
2966 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; |
2967 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2968 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2969 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2970 | c->sadb_comb_hard_addtime = 24*60*60; | |
2971 | c->sadb_comb_soft_addtime = 20*60*60; | |
2972 | c->sadb_comb_hard_usetime = 8*60*60; | |
2973 | c->sadb_comb_soft_usetime = 7*60*60; | |
2974 | } | |
2975 | } | |
2976 | } | |
2977 | ||
4c93fbb0 | 2978 | static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2979 | { |
2980 | struct sadb_prop *p; | |
2981 | int i, k; | |
2982 | ||
4df864c1 | 2983 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2984 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2985 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2986 | p->sadb_prop_replay = 32; | |
2987 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2988 | ||
2989 | for (i=0; ; i++) { | |
4c93fbb0 | 2990 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2991 | if (!ealg) |
2992 | break; | |
8ff24541 | 2993 | |
7e50f84c JK |
2994 | if (!ealg->pfkey_supported) |
2995 | continue; | |
2996 | ||
1da177e4 LT |
2997 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2998 | continue; | |
8ff24541 | 2999 | |
1da177e4 LT |
3000 | for (k = 1; ; k++) { |
3001 | struct sadb_comb *c; | |
4c93fbb0 | 3002 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
3003 | if (!aalg) |
3004 | break; | |
7e50f84c JK |
3005 | if (!aalg->pfkey_supported) |
3006 | continue; | |
1da177e4 LT |
3007 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) |
3008 | continue; | |
4df864c1 | 3009 | c = skb_put(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
3010 | memset(c, 0, sizeof(*c)); |
3011 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
3012 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
3013 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
3014 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
3015 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
3016 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
3017 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
3018 | c->sadb_comb_hard_addtime = 24*60*60; | |
3019 | c->sadb_comb_soft_addtime = 20*60*60; | |
3020 | c->sadb_comb_hard_usetime = 8*60*60; | |
3021 | c->sadb_comb_soft_usetime = 7*60*60; | |
3022 | } | |
3023 | } | |
3024 | } | |
3025 | ||
214e005b | 3026 | static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c) |
26b15dad JHS |
3027 | { |
3028 | return 0; | |
3029 | } | |
3030 | ||
214e005b | 3031 | static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
3032 | { |
3033 | struct sk_buff *out_skb; | |
3034 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
3035 | int hard; |
3036 | int hsc; | |
3037 | ||
bf08867f | 3038 | hard = c->data.hard; |
26b15dad JHS |
3039 | if (hard) |
3040 | hsc = 2; | |
3041 | else | |
3042 | hsc = 1; | |
1da177e4 | 3043 | |
050f009e | 3044 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
3045 | if (IS_ERR(out_skb)) |
3046 | return PTR_ERR(out_skb); | |
3047 | ||
3048 | out_hdr = (struct sadb_msg *) out_skb->data; | |
3049 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
3050 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
3051 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3052 | out_hdr->sadb_msg_errno = 0; | |
3053 | out_hdr->sadb_msg_reserved = 0; | |
3054 | out_hdr->sadb_msg_seq = 0; | |
3055 | out_hdr->sadb_msg_pid = 0; | |
3056 | ||
36f41f8f ED |
3057 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3058 | xs_net(x)); | |
1da177e4 LT |
3059 | return 0; |
3060 | } | |
3061 | ||
214e005b | 3062 | static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 3063 | { |
07fb0f17 | 3064 | struct net *net = x ? xs_net(x) : c->net; |
3fa87a32 AD |
3065 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3066 | ||
3067 | if (atomic_read(&net_pfkey->socks_nr) == 0) | |
99c6f60e JHS |
3068 | return 0; |
3069 | ||
26b15dad | 3070 | switch (c->event) { |
f60f6b8f | 3071 | case XFRM_MSG_EXPIRE: |
26b15dad | 3072 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
3073 | case XFRM_MSG_DELSA: |
3074 | case XFRM_MSG_NEWSA: | |
3075 | case XFRM_MSG_UPDSA: | |
26b15dad | 3076 | return key_notify_sa(x, c); |
f60f6b8f | 3077 | case XFRM_MSG_FLUSHSA: |
26b15dad | 3078 | return key_notify_sa_flush(c); |
d51d081d JHS |
3079 | case XFRM_MSG_NEWAE: /* not yet supported */ |
3080 | break; | |
26b15dad | 3081 | default: |
207024b9 | 3082 | pr_err("pfkey: Unknown SA event %d\n", c->event); |
26b15dad JHS |
3083 | break; |
3084 | } | |
3085 | ||
3086 | return 0; | |
3087 | } | |
3088 | ||
214e005b | 3089 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 3090 | { |
f7b6983f MN |
3091 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
3092 | return 0; | |
3093 | ||
26b15dad | 3094 | switch (c->event) { |
f60f6b8f | 3095 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 3096 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
3097 | case XFRM_MSG_DELPOLICY: |
3098 | case XFRM_MSG_NEWPOLICY: | |
3099 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 3100 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 3101 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
3102 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
3103 | break; | |
26b15dad JHS |
3104 | return key_notify_policy_flush(c); |
3105 | default: | |
207024b9 | 3106 | pr_err("pfkey: Unknown policy event %d\n", c->event); |
26b15dad JHS |
3107 | break; |
3108 | } | |
3109 | ||
3110 | return 0; | |
3111 | } | |
3112 | ||
1da177e4 LT |
3113 | static u32 get_acqseq(void) |
3114 | { | |
3115 | u32 res; | |
28aecb9d | 3116 | static atomic_t acqseq; |
1da177e4 | 3117 | |
28aecb9d ED |
3118 | do { |
3119 | res = atomic_inc_return(&acqseq); | |
3120 | } while (!res); | |
1da177e4 LT |
3121 | return res; |
3122 | } | |
3123 | ||
0f24558e HG |
3124 | static bool pfkey_is_alive(const struct km_event *c) |
3125 | { | |
3126 | struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id); | |
3127 | struct sock *sk; | |
3128 | bool is_alive = false; | |
3129 | ||
3130 | rcu_read_lock(); | |
3131 | sk_for_each_rcu(sk, &net_pfkey->table) { | |
3132 | if (pfkey_sk(sk)->registered) { | |
3133 | is_alive = true; | |
3134 | break; | |
3135 | } | |
3136 | } | |
3137 | rcu_read_unlock(); | |
3138 | ||
3139 | return is_alive; | |
3140 | } | |
3141 | ||
65e0736b | 3142 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp) |
1da177e4 LT |
3143 | { |
3144 | struct sk_buff *skb; | |
3145 | struct sadb_msg *hdr; | |
3146 | struct sadb_address *addr; | |
3147 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3148 | int sockaddr_size; |
3149 | int size; | |
4e2ba18e VY |
3150 | struct sadb_x_sec_ctx *sec_ctx; |
3151 | struct xfrm_sec_ctx *xfrm_ctx; | |
3152 | int ctx_size = 0; | |
8ff24541 | 3153 | |
1da177e4 LT |
3154 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3155 | if (!sockaddr_size) | |
3156 | return -EINVAL; | |
3157 | ||
3158 | size = sizeof(struct sadb_msg) + | |
3159 | (sizeof(struct sadb_address) * 2) + | |
3160 | (sockaddr_size * 2) + | |
3161 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3162 | |
1da177e4 LT |
3163 | if (x->id.proto == IPPROTO_AH) |
3164 | size += count_ah_combs(t); | |
3165 | else if (x->id.proto == IPPROTO_ESP) | |
3166 | size += count_esp_combs(t); | |
3167 | ||
4e2ba18e VY |
3168 | if ((xfrm_ctx = x->security)) { |
3169 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3170 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3171 | } | |
3172 | ||
1da177e4 LT |
3173 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3174 | if (skb == NULL) | |
3175 | return -ENOMEM; | |
8ff24541 | 3176 | |
4df864c1 | 3177 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3178 | hdr->sadb_msg_version = PF_KEY_V2; |
3179 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3180 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3181 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3182 | hdr->sadb_msg_errno = 0; | |
3183 | hdr->sadb_msg_reserved = 0; | |
3184 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3185 | hdr->sadb_msg_pid = 0; | |
3186 | ||
3187 | /* src address */ | |
4df864c1 | 3188 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3189 | addr->sadb_address_len = |
1da177e4 LT |
3190 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3191 | sizeof(uint64_t); | |
3192 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3193 | addr->sadb_address_proto = 0; | |
3194 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3195 | addr->sadb_address_prefixlen = |
3196 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3197 | (struct sockaddr *) (addr + 1), | |
3198 | x->props.family); | |
3199 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3200 | BUG(); |
8ff24541 | 3201 | |
1da177e4 | 3202 | /* dst address */ |
4df864c1 | 3203 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
3204 | addr->sadb_address_len = |
3205 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3206 | sizeof(uint64_t); | |
3207 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3208 | addr->sadb_address_proto = 0; | |
3209 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3210 | addr->sadb_address_prefixlen = |
3211 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3212 | (struct sockaddr *) (addr + 1), | |
3213 | x->props.family); | |
3214 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3215 | BUG(); |
3216 | ||
4df864c1 | 3217 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
3218 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
3219 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3220 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
65e0736b | 3221 | pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1; |
ff862a46 | 3222 | pol->sadb_x_policy_reserved = 0; |
1da177e4 | 3223 | pol->sadb_x_policy_id = xp->index; |
ff862a46 | 3224 | pol->sadb_x_policy_priority = xp->priority; |
1da177e4 LT |
3225 | |
3226 | /* Set sadb_comb's. */ | |
3227 | if (x->id.proto == IPPROTO_AH) | |
3228 | dump_ah_combs(skb, t); | |
3229 | else if (x->id.proto == IPPROTO_ESP) | |
3230 | dump_esp_combs(skb, t); | |
3231 | ||
4e2ba18e VY |
3232 | /* security context */ |
3233 | if (xfrm_ctx) { | |
4df864c1 JB |
3234 | sec_ctx = skb_put(skb, |
3235 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
4e2ba18e VY |
3236 | sec_ctx->sadb_x_sec_len = |
3237 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3238 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3239 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3240 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3241 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3242 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3243 | xfrm_ctx->ctx_len); | |
3244 | } | |
3245 | ||
36f41f8f ED |
3246 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3247 | xs_net(x)); | |
1da177e4 LT |
3248 | } |
3249 | ||
cb969f07 | 3250 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3251 | u8 *data, int len, int *dir) |
1da177e4 | 3252 | { |
07fb0f17 | 3253 | struct net *net = sock_net(sk); |
1da177e4 LT |
3254 | struct xfrm_policy *xp; |
3255 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3256 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3257 | |
cb969f07 | 3258 | switch (sk->sk_family) { |
1da177e4 LT |
3259 | case AF_INET: |
3260 | if (opt != IP_IPSEC_POLICY) { | |
3261 | *dir = -EOPNOTSUPP; | |
3262 | return NULL; | |
3263 | } | |
3264 | break; | |
dfd56b8b | 3265 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
3266 | case AF_INET6: |
3267 | if (opt != IPV6_IPSEC_POLICY) { | |
3268 | *dir = -EOPNOTSUPP; | |
3269 | return NULL; | |
3270 | } | |
3271 | break; | |
3272 | #endif | |
3273 | default: | |
3274 | *dir = -EINVAL; | |
3275 | return NULL; | |
3276 | } | |
3277 | ||
3278 | *dir = -EINVAL; | |
3279 | ||
3280 | if (len < sizeof(struct sadb_x_policy) || | |
3281 | pol->sadb_x_policy_len*8 > len || | |
3282 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3283 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3284 | return NULL; | |
3285 | ||
07fb0f17 | 3286 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
3287 | if (xp == NULL) { |
3288 | *dir = -ENOBUFS; | |
3289 | return NULL; | |
3290 | } | |
3291 | ||
3292 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3293 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3294 | ||
3295 | xp->lft.soft_byte_limit = XFRM_INF; | |
3296 | xp->lft.hard_byte_limit = XFRM_INF; | |
3297 | xp->lft.soft_packet_limit = XFRM_INF; | |
3298 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3299 | xp->family = sk->sk_family; |
1da177e4 LT |
3300 | |
3301 | xp->xfrm_nr = 0; | |
3302 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3303 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3304 | goto out; | |
3305 | ||
df71837d TJ |
3306 | /* security context too */ |
3307 | if (len >= (pol->sadb_x_policy_len*8 + | |
3308 | sizeof(struct sadb_x_sec_ctx))) { | |
3309 | char *p = (char *)pol; | |
3310 | struct xfrm_user_sec_ctx *uctx; | |
3311 | ||
3312 | p += pol->sadb_x_policy_len*8; | |
3313 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3314 | if (len < pol->sadb_x_policy_len*8 + | |
d90c9024 | 3315 | sec_ctx->sadb_x_sec_len*8) { |
cb969f07 | 3316 | *dir = -EINVAL; |
df71837d | 3317 | goto out; |
cb969f07 | 3318 | } |
df71837d TJ |
3319 | if ((*dir = verify_sec_ctx_len(p))) |
3320 | goto out; | |
87536a81 | 3321 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC); |
52a4c640 | 3322 | *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC); |
df71837d TJ |
3323 | kfree(uctx); |
3324 | ||
3325 | if (*dir) | |
3326 | goto out; | |
3327 | } | |
3328 | ||
1da177e4 LT |
3329 | *dir = pol->sadb_x_policy_dir-1; |
3330 | return xp; | |
3331 | ||
3332 | out: | |
70e90679 | 3333 | xp->walk.dead = 1; |
64c31b3f | 3334 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3335 | return NULL; |
3336 | } | |
3337 | ||
5d36b180 | 3338 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3339 | { |
3340 | struct sk_buff *skb; | |
3341 | struct sadb_msg *hdr; | |
3342 | struct sadb_sa *sa; | |
3343 | struct sadb_address *addr; | |
3344 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3345 | int sockaddr_size; |
3346 | int size; | |
3347 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3348 | struct xfrm_encap_tmpl *natt = NULL; | |
3349 | ||
3350 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3351 | if (!sockaddr_size) | |
3352 | return -EINVAL; | |
3353 | ||
3354 | if (!satype) | |
3355 | return -EINVAL; | |
3356 | ||
3357 | if (!x->encap) | |
3358 | return -EINVAL; | |
3359 | ||
3360 | natt = x->encap; | |
3361 | ||
3362 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3363 | * | |
3364 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3365 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3366 | */ | |
8ff24541 | 3367 | |
1da177e4 LT |
3368 | size = sizeof(struct sadb_msg) + |
3369 | sizeof(struct sadb_sa) + | |
3370 | (sizeof(struct sadb_address) * 2) + | |
3371 | (sockaddr_size * 2) + | |
3372 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3373 | |
1da177e4 LT |
3374 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3375 | if (skb == NULL) | |
3376 | return -ENOMEM; | |
8ff24541 | 3377 | |
4df864c1 | 3378 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3379 | hdr->sadb_msg_version = PF_KEY_V2; |
3380 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3381 | hdr->sadb_msg_satype = satype; | |
3382 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3383 | hdr->sadb_msg_errno = 0; | |
3384 | hdr->sadb_msg_reserved = 0; | |
3385 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3386 | hdr->sadb_msg_pid = 0; | |
3387 | ||
3388 | /* SA */ | |
4df864c1 | 3389 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
3390 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
3391 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3392 | sa->sadb_sa_spi = x->id.spi; | |
3393 | sa->sadb_sa_replay = 0; | |
3394 | sa->sadb_sa_state = 0; | |
3395 | sa->sadb_sa_auth = 0; | |
3396 | sa->sadb_sa_encrypt = 0; | |
3397 | sa->sadb_sa_flags = 0; | |
3398 | ||
3399 | /* ADDRESS_SRC (old addr) */ | |
4df864c1 | 3400 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3401 | addr->sadb_address_len = |
1da177e4 LT |
3402 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3403 | sizeof(uint64_t); | |
3404 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3405 | addr->sadb_address_proto = 0; | |
3406 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3407 | addr->sadb_address_prefixlen = |
3408 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3409 | (struct sockaddr *) (addr + 1), | |
3410 | x->props.family); | |
3411 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3412 | BUG(); |
3413 | ||
3414 | /* NAT_T_SPORT (old port) */ | |
4df864c1 | 3415 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3416 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3417 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3418 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3419 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3420 | ||
3421 | /* ADDRESS_DST (new addr) */ | |
4df864c1 | 3422 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3423 | addr->sadb_address_len = |
1da177e4 LT |
3424 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3425 | sizeof(uint64_t); | |
3426 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3427 | addr->sadb_address_proto = 0; | |
3428 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3429 | addr->sadb_address_prefixlen = |
3430 | pfkey_sockaddr_fill(ipaddr, 0, | |
3431 | (struct sockaddr *) (addr + 1), | |
3432 | x->props.family); | |
3433 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3434 | BUG(); |
3435 | ||
3436 | /* NAT_T_DPORT (new port) */ | |
4df864c1 | 3437 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3438 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3439 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3440 | n_port->sadb_x_nat_t_port_port = sport; | |
3441 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3442 | ||
36f41f8f ED |
3443 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3444 | xs_net(x)); | |
1da177e4 LT |
3445 | } |
3446 | ||
08de61be SS |
3447 | #ifdef CONFIG_NET_KEY_MIGRATE |
3448 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
183cad12 | 3449 | const struct xfrm_selector *sel) |
08de61be SS |
3450 | { |
3451 | struct sadb_address *addr; | |
4df864c1 | 3452 | addr = skb_put(skb, sizeof(struct sadb_address) + sasize); |
08de61be SS |
3453 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; |
3454 | addr->sadb_address_exttype = type; | |
3455 | addr->sadb_address_proto = sel->proto; | |
3456 | addr->sadb_address_reserved = 0; | |
3457 | ||
3458 | switch (type) { | |
3459 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3460 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3461 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3462 | (struct sockaddr *)(addr + 1), | |
3463 | sel->family); | |
08de61be SS |
3464 | break; |
3465 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3466 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3467 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3468 | (struct sockaddr *)(addr + 1), | |
3469 | sel->family); | |
08de61be SS |
3470 | break; |
3471 | default: | |
3472 | return -EINVAL; | |
3473 | } | |
3474 | ||
3475 | return 0; | |
3476 | } | |
3477 | ||
13c1d189 | 3478 | |
183cad12 | 3479 | static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k) |
13c1d189 AE |
3480 | { |
3481 | struct sadb_x_kmaddress *kma; | |
3482 | u8 *sa; | |
3483 | int family = k->family; | |
3484 | int socklen = pfkey_sockaddr_len(family); | |
3485 | int size_req; | |
3486 | ||
3487 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3488 | pfkey_sockaddr_pair_size(family)); | |
3489 | ||
b080db58 | 3490 | kma = skb_put_zero(skb, size_req); |
13c1d189 AE |
3491 | kma->sadb_x_kmaddress_len = size_req / 8; |
3492 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3493 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3494 | ||
3495 | sa = (u8 *)(kma + 1); | |
3496 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3497 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3498 | return -EINVAL; | |
3499 | ||
3500 | return 0; | |
3501 | } | |
3502 | ||
08de61be SS |
3503 | static int set_ipsecrequest(struct sk_buff *skb, |
3504 | uint8_t proto, uint8_t mode, int level, | |
3505 | uint32_t reqid, uint8_t family, | |
183cad12 | 3506 | const xfrm_address_t *src, const xfrm_address_t *dst) |
08de61be SS |
3507 | { |
3508 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3509 | u8 *sa; |
3510 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3511 | int size_req; |
3512 | ||
3513 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3514 | pfkey_sockaddr_pair_size(family); | |
3515 | ||
b080db58 | 3516 | rq = skb_put_zero(skb, size_req); |
08de61be SS |
3517 | rq->sadb_x_ipsecrequest_len = size_req; |
3518 | rq->sadb_x_ipsecrequest_proto = proto; | |
3519 | rq->sadb_x_ipsecrequest_mode = mode; | |
3520 | rq->sadb_x_ipsecrequest_level = level; | |
3521 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3522 | ||
e5b56652 YH |
3523 | sa = (u8 *) (rq + 1); |
3524 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3525 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3526 | return -EINVAL; |
08de61be SS |
3527 | |
3528 | return 0; | |
3529 | } | |
3530 | #endif | |
3531 | ||
3532 | #ifdef CONFIG_NET_KEY_MIGRATE | |
183cad12 DM |
3533 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3534 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3535 | const struct xfrm_kmaddress *k, |
3536 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3537 | { |
3538 | int i; | |
3539 | int sasize_sel; | |
3540 | int size = 0; | |
3541 | int size_pol = 0; | |
3542 | struct sk_buff *skb; | |
3543 | struct sadb_msg *hdr; | |
3544 | struct sadb_x_policy *pol; | |
183cad12 | 3545 | const struct xfrm_migrate *mp; |
08de61be SS |
3546 | |
3547 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3548 | return 0; | |
3549 | ||
3550 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3551 | return -EINVAL; | |
3552 | ||
13c1d189 AE |
3553 | if (k != NULL) { |
3554 | /* addresses for KM */ | |
3555 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3556 | pfkey_sockaddr_pair_size(k->family)); | |
3557 | } | |
3558 | ||
08de61be SS |
3559 | /* selector */ |
3560 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3561 | if (!sasize_sel) | |
3562 | return -EINVAL; | |
3563 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3564 | ||
3565 | /* policy info */ | |
3566 | size_pol += sizeof(struct sadb_x_policy); | |
3567 | ||
3568 | /* ipsecrequests */ | |
3569 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3570 | /* old locator pair */ | |
3571 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3572 | pfkey_sockaddr_pair_size(mp->old_family); | |
3573 | /* new locator pair */ | |
3574 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3575 | pfkey_sockaddr_pair_size(mp->new_family); | |
3576 | } | |
3577 | ||
3578 | size += sizeof(struct sadb_msg) + size_pol; | |
3579 | ||
3580 | /* alloc buffer */ | |
3581 | skb = alloc_skb(size, GFP_ATOMIC); | |
3582 | if (skb == NULL) | |
3583 | return -ENOMEM; | |
3584 | ||
4df864c1 | 3585 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
08de61be SS |
3586 | hdr->sadb_msg_version = PF_KEY_V2; |
3587 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3588 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3589 | hdr->sadb_msg_len = size / 8; | |
3590 | hdr->sadb_msg_errno = 0; | |
3591 | hdr->sadb_msg_reserved = 0; | |
3592 | hdr->sadb_msg_seq = 0; | |
3593 | hdr->sadb_msg_pid = 0; | |
3594 | ||
13c1d189 AE |
3595 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3596 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
89eb06f1 | 3597 | goto err; |
13c1d189 | 3598 | |
08de61be SS |
3599 | /* selector src */ |
3600 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3601 | ||
3602 | /* selector dst */ | |
3603 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3604 | ||
3605 | /* policy information */ | |
4df864c1 | 3606 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
08de61be SS |
3607 | pol->sadb_x_policy_len = size_pol / 8; |
3608 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3609 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3610 | pol->sadb_x_policy_dir = dir + 1; | |
ff862a46 | 3611 | pol->sadb_x_policy_reserved = 0; |
08de61be SS |
3612 | pol->sadb_x_policy_id = 0; |
3613 | pol->sadb_x_policy_priority = 0; | |
3614 | ||
3615 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3616 | /* old ipsecrequest */ | |
55569ce2 KM |
3617 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3618 | if (mode < 0) | |
d4782c32 | 3619 | goto err; |
55569ce2 | 3620 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3621 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3622 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3623 | &mp->old_saddr, &mp->old_daddr) < 0) |
3624 | goto err; | |
08de61be SS |
3625 | |
3626 | /* new ipsecrequest */ | |
55569ce2 | 3627 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3628 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3629 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3630 | &mp->new_saddr, &mp->new_daddr) < 0) |
3631 | goto err; | |
08de61be SS |
3632 | } |
3633 | ||
3634 | /* broadcast migrate message to sockets */ | |
36f41f8f | 3635 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61be SS |
3636 | |
3637 | return 0; | |
d4782c32 PM |
3638 | |
3639 | err: | |
3640 | kfree_skb(skb); | |
3641 | return -EINVAL; | |
08de61be SS |
3642 | } |
3643 | #else | |
183cad12 DM |
3644 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3645 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3646 | const struct xfrm_kmaddress *k, |
3647 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3648 | { |
3649 | return -ENOPROTOOPT; | |
3650 | } | |
3651 | #endif | |
3652 | ||
1b784140 | 3653 | static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
1da177e4 LT |
3654 | { |
3655 | struct sock *sk = sock->sk; | |
3656 | struct sk_buff *skb = NULL; | |
3657 | struct sadb_msg *hdr = NULL; | |
3658 | int err; | |
283bc9f3 | 3659 | struct net *net = sock_net(sk); |
1da177e4 LT |
3660 | |
3661 | err = -EOPNOTSUPP; | |
3662 | if (msg->msg_flags & MSG_OOB) | |
3663 | goto out; | |
3664 | ||
3665 | err = -EMSGSIZE; | |
95c96174 | 3666 | if ((unsigned int)len > sk->sk_sndbuf - 32) |
1da177e4 LT |
3667 | goto out; |
3668 | ||
3669 | err = -ENOBUFS; | |
3670 | skb = alloc_skb(len, GFP_KERNEL); | |
3671 | if (skb == NULL) | |
3672 | goto out; | |
3673 | ||
3674 | err = -EFAULT; | |
6ce8e9ce | 3675 | if (memcpy_from_msg(skb_put(skb,len), msg, len)) |
1da177e4 LT |
3676 | goto out; |
3677 | ||
3678 | hdr = pfkey_get_base_msg(skb, &err); | |
3679 | if (!hdr) | |
3680 | goto out; | |
3681 | ||
283bc9f3 | 3682 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 | 3683 | err = pfkey_process(sk, skb, hdr); |
283bc9f3 | 3684 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
3685 | |
3686 | out: | |
3687 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3688 | err = 0; | |
6f961068 | 3689 | kfree_skb(skb); |
1da177e4 LT |
3690 | |
3691 | return err ? : len; | |
3692 | } | |
3693 | ||
1b784140 | 3694 | static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
1da177e4 LT |
3695 | int flags) |
3696 | { | |
3697 | struct sock *sk = sock->sk; | |
83321d6b | 3698 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3699 | struct sk_buff *skb; |
3700 | int copied, err; | |
3701 | ||
3702 | err = -EINVAL; | |
3703 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3704 | goto out; | |
3705 | ||
f4b41f06 | 3706 | skb = skb_recv_datagram(sk, flags, &err); |
1da177e4 LT |
3707 | if (skb == NULL) |
3708 | goto out; | |
3709 | ||
3710 | copied = skb->len; | |
3711 | if (copied > len) { | |
3712 | msg->msg_flags |= MSG_TRUNC; | |
3713 | copied = len; | |
3714 | } | |
3715 | ||
badff6d0 | 3716 | skb_reset_transport_header(skb); |
51f3d02b | 3717 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
3718 | if (err) |
3719 | goto out_free; | |
3720 | ||
6fd1d51c | 3721 | sock_recv_cmsgs(msg, sk, skb); |
1da177e4 LT |
3722 | |
3723 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3724 | ||
83321d6b TT |
3725 | if (pfk->dump.dump != NULL && |
3726 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3727 | pfkey_do_dump(pfk); | |
3728 | ||
1da177e4 LT |
3729 | out_free: |
3730 | skb_free_datagram(sk, skb); | |
3731 | out: | |
3732 | return err; | |
3733 | } | |
3734 | ||
90ddc4f0 | 3735 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3736 | .family = PF_KEY, |
3737 | .owner = THIS_MODULE, | |
3738 | /* Operations that make no sense on pfkey sockets. */ | |
3739 | .bind = sock_no_bind, | |
3740 | .connect = sock_no_connect, | |
3741 | .socketpair = sock_no_socketpair, | |
3742 | .accept = sock_no_accept, | |
3743 | .getname = sock_no_getname, | |
3744 | .ioctl = sock_no_ioctl, | |
3745 | .listen = sock_no_listen, | |
3746 | .shutdown = sock_no_shutdown, | |
1da177e4 LT |
3747 | .mmap = sock_no_mmap, |
3748 | .sendpage = sock_no_sendpage, | |
3749 | ||
3750 | /* Now the operations that really occur. */ | |
3751 | .release = pfkey_release, | |
a11e1d43 | 3752 | .poll = datagram_poll, |
1da177e4 LT |
3753 | .sendmsg = pfkey_sendmsg, |
3754 | .recvmsg = pfkey_recvmsg, | |
3755 | }; | |
3756 | ||
ec1b4cf7 | 3757 | static const struct net_proto_family pfkey_family_ops = { |
1da177e4 LT |
3758 | .family = PF_KEY, |
3759 | .create = pfkey_create, | |
3760 | .owner = THIS_MODULE, | |
3761 | }; | |
3762 | ||
3763 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3764 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3765 | { |
27b5b865 | 3766 | struct sock *s = sk_entry(v); |
1da177e4 | 3767 | |
bd2f7476 PE |
3768 | if (v == SEQ_START_TOKEN) |
3769 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3770 | else | |
71338aa7 | 3771 | seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n", |
1da177e4 | 3772 | s, |
41c6d650 | 3773 | refcount_read(&s->sk_refcnt), |
31e6d363 ED |
3774 | sk_rmem_alloc_get(s), |
3775 | sk_wmem_alloc_get(s), | |
a7cb5a49 | 3776 | from_kuid_munged(seq_user_ns(f), sock_i_uid(s)), |
1da177e4 LT |
3777 | sock_i_ino(s) |
3778 | ); | |
bd2f7476 PE |
3779 | return 0; |
3780 | } | |
3781 | ||
3782 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
ada440e3 | 3783 | __acquires(rcu) |
bd2f7476 | 3784 | { |
7013ec30 | 3785 | struct net *net = seq_file_net(f); |
3fa87a32 | 3786 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 3787 | |
7f6b9dbd | 3788 | rcu_read_lock(); |
3789 | return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); | |
bd2f7476 PE |
3790 | } |
3791 | ||
3792 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3793 | { | |
7013ec30 | 3794 | struct net *net = seq_file_net(f); |
3fa87a32 AD |
3795 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3796 | ||
7f6b9dbd | 3797 | return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
bd2f7476 | 3798 | } |
1da177e4 | 3799 | |
bd2f7476 | 3800 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
ada440e3 | 3801 | __releases(rcu) |
bd2f7476 | 3802 | { |
7f6b9dbd | 3803 | rcu_read_unlock(); |
bd2f7476 | 3804 | } |
1da177e4 | 3805 | |
98147d52 | 3806 | static const struct seq_operations pfkey_seq_ops = { |
bd2f7476 PE |
3807 | .start = pfkey_seq_start, |
3808 | .next = pfkey_seq_next, | |
3809 | .stop = pfkey_seq_stop, | |
3810 | .show = pfkey_seq_show, | |
3811 | }; | |
1da177e4 | 3812 | |
7013ec30 | 3813 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 | 3814 | { |
bd2f7476 PE |
3815 | struct proc_dir_entry *e; |
3816 | ||
c3506372 CH |
3817 | e = proc_create_net("pfkey", 0, net->proc_net, &pfkey_seq_ops, |
3818 | sizeof(struct seq_net_private)); | |
bd2f7476 | 3819 | if (e == NULL) |
61145aa1 | 3820 | return -ENOMEM; |
bd2f7476 | 3821 | |
bd2f7476 | 3822 | return 0; |
61145aa1 PE |
3823 | } |
3824 | ||
2c8c1e72 | 3825 | static void __net_exit pfkey_exit_proc(struct net *net) |
61145aa1 | 3826 | { |
ece31ffd | 3827 | remove_proc_entry("pfkey", net->proc_net); |
61145aa1 PE |
3828 | } |
3829 | #else | |
2c8c1e72 | 3830 | static inline int pfkey_init_proc(struct net *net) |
61145aa1 PE |
3831 | { |
3832 | return 0; | |
3833 | } | |
3834 | ||
2c8c1e72 | 3835 | static inline void pfkey_exit_proc(struct net *net) |
61145aa1 PE |
3836 | { |
3837 | } | |
1da177e4 LT |
3838 | #endif |
3839 | ||
3840 | static struct xfrm_mgr pfkeyv2_mgr = | |
3841 | { | |
1da177e4 LT |
3842 | .notify = pfkey_send_notify, |
3843 | .acquire = pfkey_send_acquire, | |
3844 | .compile_policy = pfkey_compile_policy, | |
3845 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3846 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3847 | .migrate = pfkey_send_migrate, |
0f24558e | 3848 | .is_alive = pfkey_is_alive, |
1da177e4 LT |
3849 | }; |
3850 | ||
3fa87a32 AD |
3851 | static int __net_init pfkey_net_init(struct net *net) |
3852 | { | |
23c049ca | 3853 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3fa87a32 AD |
3854 | int rv; |
3855 | ||
3fa87a32 AD |
3856 | INIT_HLIST_HEAD(&net_pfkey->table); |
3857 | atomic_set(&net_pfkey->socks_nr, 0); | |
23c049ca | 3858 | |
7013ec30 | 3859 | rv = pfkey_init_proc(net); |
3fa87a32 | 3860 | |
3fa87a32 AD |
3861 | return rv; |
3862 | } | |
3863 | ||
3864 | static void __net_exit pfkey_net_exit(struct net *net) | |
3865 | { | |
3866 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
3867 | ||
7013ec30 | 3868 | pfkey_exit_proc(net); |
663faeab | 3869 | WARN_ON(!hlist_empty(&net_pfkey->table)); |
3fa87a32 AD |
3870 | } |
3871 | ||
3872 | static struct pernet_operations pfkey_net_ops = { | |
3873 | .init = pfkey_net_init, | |
3874 | .exit = pfkey_net_exit, | |
23c049ca EB |
3875 | .id = &pfkey_net_id, |
3876 | .size = sizeof(struct netns_pfkey), | |
3fa87a32 AD |
3877 | }; |
3878 | ||
1da177e4 LT |
3879 | static void __exit ipsec_pfkey_exit(void) |
3880 | { | |
3881 | xfrm_unregister_km(&pfkeyv2_mgr); | |
1da177e4 | 3882 | sock_unregister(PF_KEY); |
180211b8 | 3883 | unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3884 | proto_unregister(&key_proto); |
3885 | } | |
3886 | ||
3887 | static int __init ipsec_pfkey_init(void) | |
3888 | { | |
3889 | int err = proto_register(&key_proto, 0); | |
3890 | ||
3891 | if (err != 0) | |
3892 | goto out; | |
3893 | ||
180211b8 | 3894 | err = register_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3895 | if (err != 0) |
3896 | goto out_unregister_key_proto; | |
180211b8 AD |
3897 | err = sock_register(&pfkey_family_ops); |
3898 | if (err != 0) | |
3899 | goto out_unregister_pernet; | |
f41b284a | 3900 | xfrm_register_km(&pfkeyv2_mgr); |
1da177e4 LT |
3901 | out: |
3902 | return err; | |
180211b8 | 3903 | |
180211b8 AD |
3904 | out_unregister_pernet: |
3905 | unregister_pernet_subsys(&pfkey_net_ops); | |
1da177e4 LT |
3906 | out_unregister_key_proto: |
3907 | proto_unregister(&key_proto); | |
3908 | goto out; | |
3909 | } | |
3910 | ||
3911 | module_init(ipsec_pfkey_init); | |
3912 | module_exit(ipsec_pfkey_exit); | |
3913 | MODULE_LICENSE("GPL"); | |
3914 | MODULE_ALIAS_NETPROTO(PF_KEY); |