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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Maxim Giryaev <gem@asplinux.ru> | |
10 | * David S. Miller <davem@redhat.com> | |
11 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
12 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
13 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> | |
14 | * Derek Atkins <derek@ihtfp.com> | |
15 | */ | |
16 | ||
4fc268d2 | 17 | #include <linux/capability.h> |
1da177e4 LT |
18 | #include <linux/module.h> |
19 | #include <linux/kernel.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/pfkeyv2.h> | |
22 | #include <linux/ipsec.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/rtnetlink.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/in6.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/init.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
457c4cbc | 30 | #include <net/net_namespace.h> |
3fa87a32 | 31 | #include <net/netns/generic.h> |
1da177e4 LT |
32 | #include <net/xfrm.h> |
33 | ||
34 | #include <net/sock.h> | |
35 | ||
36 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) | |
37 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) | |
38 | ||
c7d03a00 | 39 | static unsigned int pfkey_net_id __read_mostly; |
3fa87a32 AD |
40 | struct netns_pfkey { |
41 | /* List of all pfkey sockets. */ | |
42 | struct hlist_head table; | |
43 | atomic_t socks_nr; | |
44 | }; | |
7f6b9dbd | 45 | static DEFINE_MUTEX(pfkey_mutex); |
1da177e4 | 46 | |
bd55775c | 47 | #define DUMMY_MARK 0 |
e473fcb4 | 48 | static const struct xfrm_mark dummy_mark = {0, 0}; |
1da177e4 LT |
49 | struct pfkey_sock { |
50 | /* struct sock must be the first member of struct pfkey_sock */ | |
51 | struct sock sk; | |
52 | int registered; | |
53 | int promisc; | |
83321d6b TT |
54 | |
55 | struct { | |
56 | uint8_t msg_version; | |
15e47304 | 57 | uint32_t msg_portid; |
83321d6b TT |
58 | int (*dump)(struct pfkey_sock *sk); |
59 | void (*done)(struct pfkey_sock *sk); | |
60 | union { | |
61 | struct xfrm_policy_walk policy; | |
62 | struct xfrm_state_walk state; | |
63 | } u; | |
12a169e7 | 64 | struct sk_buff *skb; |
83321d6b | 65 | } dump; |
89e357d8 | 66 | struct mutex dump_lock; |
1da177e4 LT |
67 | }; |
68 | ||
096f41d3 HX |
69 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
70 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
71 | u16 *family); | |
72 | ||
1da177e4 LT |
73 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) |
74 | { | |
75 | return (struct pfkey_sock *)sk; | |
76 | } | |
77 | ||
4c93fbb0 | 78 | static int pfkey_can_dump(const struct sock *sk) |
83321d6b TT |
79 | { |
80 | if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) | |
81 | return 1; | |
82 | return 0; | |
83 | } | |
84 | ||
05238204 | 85 | static void pfkey_terminate_dump(struct pfkey_sock *pfk) |
83321d6b | 86 | { |
05238204 | 87 | if (pfk->dump.dump) { |
12a169e7 HX |
88 | if (pfk->dump.skb) { |
89 | kfree_skb(pfk->dump.skb); | |
90 | pfk->dump.skb = NULL; | |
91 | } | |
05238204 TT |
92 | pfk->dump.done(pfk); |
93 | pfk->dump.dump = NULL; | |
94 | pfk->dump.done = NULL; | |
95 | } | |
83321d6b TT |
96 | } |
97 | ||
1da177e4 LT |
98 | static void pfkey_sock_destruct(struct sock *sk) |
99 | { | |
3fa87a32 AD |
100 | struct net *net = sock_net(sk); |
101 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
102 | ||
05238204 | 103 | pfkey_terminate_dump(pfkey_sk(sk)); |
1da177e4 LT |
104 | skb_queue_purge(&sk->sk_receive_queue); |
105 | ||
106 | if (!sock_flag(sk, SOCK_DEAD)) { | |
207024b9 | 107 | pr_err("Attempt to release alive pfkey socket: %p\n", sk); |
1da177e4 LT |
108 | return; |
109 | } | |
110 | ||
547b792c | 111 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
14afee4b | 112 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
1da177e4 | 113 | |
3fa87a32 | 114 | atomic_dec(&net_pfkey->socks_nr); |
1da177e4 LT |
115 | } |
116 | ||
90ddc4f0 | 117 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
118 | |
119 | static void pfkey_insert(struct sock *sk) | |
120 | { | |
3fa87a32 AD |
121 | struct net *net = sock_net(sk); |
122 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
123 | ||
7f6b9dbd | 124 | mutex_lock(&pfkey_mutex); |
125 | sk_add_node_rcu(sk, &net_pfkey->table); | |
126 | mutex_unlock(&pfkey_mutex); | |
1da177e4 LT |
127 | } |
128 | ||
129 | static void pfkey_remove(struct sock *sk) | |
130 | { | |
7f6b9dbd | 131 | mutex_lock(&pfkey_mutex); |
132 | sk_del_node_init_rcu(sk); | |
133 | mutex_unlock(&pfkey_mutex); | |
1da177e4 LT |
134 | } |
135 | ||
136 | static struct proto key_proto = { | |
137 | .name = "KEY", | |
138 | .owner = THIS_MODULE, | |
139 | .obj_size = sizeof(struct pfkey_sock), | |
140 | }; | |
141 | ||
3f378b68 EP |
142 | static int pfkey_create(struct net *net, struct socket *sock, int protocol, |
143 | int kern) | |
1da177e4 | 144 | { |
3fa87a32 | 145 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 146 | struct sock *sk; |
89e357d8 | 147 | struct pfkey_sock *pfk; |
1da177e4 LT |
148 | int err; |
149 | ||
df008c91 | 150 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
151 | return -EPERM; |
152 | if (sock->type != SOCK_RAW) | |
153 | return -ESOCKTNOSUPPORT; | |
154 | if (protocol != PF_KEY_V2) | |
155 | return -EPROTONOSUPPORT; | |
156 | ||
157 | err = -ENOMEM; | |
11aa9c28 | 158 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern); |
1da177e4 LT |
159 | if (sk == NULL) |
160 | goto out; | |
8ff24541 | 161 | |
89e357d8 YS |
162 | pfk = pfkey_sk(sk); |
163 | mutex_init(&pfk->dump_lock); | |
164 | ||
1da177e4 LT |
165 | sock->ops = &pfkey_ops; |
166 | sock_init_data(sock, sk); | |
167 | ||
168 | sk->sk_family = PF_KEY; | |
169 | sk->sk_destruct = pfkey_sock_destruct; | |
170 | ||
3fa87a32 | 171 | atomic_inc(&net_pfkey->socks_nr); |
1da177e4 LT |
172 | |
173 | pfkey_insert(sk); | |
174 | ||
175 | return 0; | |
176 | out: | |
177 | return err; | |
178 | } | |
179 | ||
180 | static int pfkey_release(struct socket *sock) | |
181 | { | |
182 | struct sock *sk = sock->sk; | |
183 | ||
184 | if (!sk) | |
185 | return 0; | |
186 | ||
187 | pfkey_remove(sk); | |
188 | ||
189 | sock_orphan(sk); | |
190 | sock->sk = NULL; | |
191 | skb_queue_purge(&sk->sk_write_queue); | |
7f6b9dbd | 192 | |
193 | synchronize_rcu(); | |
1da177e4 LT |
194 | sock_put(sk); |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | |
dd0fc66f | 200 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
201 | { |
202 | int err = -ENOBUFS; | |
203 | ||
204 | sock_hold(sk); | |
205 | if (*skb2 == NULL) { | |
63354797 | 206 | if (refcount_read(&skb->users) != 1) { |
1da177e4 LT |
207 | *skb2 = skb_clone(skb, allocation); |
208 | } else { | |
209 | *skb2 = skb; | |
63354797 | 210 | refcount_inc(&skb->users); |
1da177e4 LT |
211 | } |
212 | } | |
213 | if (*skb2 != NULL) { | |
214 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { | |
1da177e4 LT |
215 | skb_set_owner_r(*skb2, sk); |
216 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | |
676d2369 | 217 | sk->sk_data_ready(sk); |
1da177e4 LT |
218 | *skb2 = NULL; |
219 | err = 0; | |
220 | } | |
221 | } | |
222 | sock_put(sk); | |
223 | return err; | |
224 | } | |
225 | ||
226 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
227 | #define BROADCAST_ALL 0 | |
228 | #define BROADCAST_ONE 1 | |
229 | #define BROADCAST_REGISTERED 2 | |
230 | #define BROADCAST_PROMISC_ONLY 4 | |
36f41f8f | 231 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
07fb0f17 AD |
232 | int broadcast_flags, struct sock *one_sk, |
233 | struct net *net) | |
1da177e4 | 234 | { |
3fa87a32 | 235 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 236 | struct sock *sk; |
1da177e4 LT |
237 | struct sk_buff *skb2 = NULL; |
238 | int err = -ESRCH; | |
239 | ||
240 | /* XXX Do we need something like netlink_overrun? I think | |
241 | * XXX PF_KEY socket apps will not mind current behavior. | |
242 | */ | |
243 | if (!skb) | |
244 | return -ENOMEM; | |
245 | ||
7f6b9dbd | 246 | rcu_read_lock(); |
b67bfe0d | 247 | sk_for_each_rcu(sk, &net_pfkey->table) { |
1da177e4 LT |
248 | struct pfkey_sock *pfk = pfkey_sk(sk); |
249 | int err2; | |
250 | ||
251 | /* Yes, it means that if you are meant to receive this | |
252 | * pfkey message you receive it twice as promiscuous | |
253 | * socket. | |
254 | */ | |
255 | if (pfk->promisc) | |
ba51b6be | 256 | pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk); |
1da177e4 LT |
257 | |
258 | /* the exact target will be processed later */ | |
259 | if (sk == one_sk) | |
260 | continue; | |
261 | if (broadcast_flags != BROADCAST_ALL) { | |
262 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
263 | continue; | |
264 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
265 | !pfk->registered) | |
266 | continue; | |
267 | if (broadcast_flags & BROADCAST_ONE) | |
268 | continue; | |
269 | } | |
270 | ||
ba51b6be | 271 | err2 = pfkey_broadcast_one(skb, &skb2, GFP_ATOMIC, sk); |
1da177e4 | 272 | |
f6b8dec9 | 273 | /* Error is cleared after successful sending to at least one |
1da177e4 LT |
274 | * registered KM */ |
275 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
276 | err = err2; | |
277 | } | |
7f6b9dbd | 278 | rcu_read_unlock(); |
1da177e4 LT |
279 | |
280 | if (one_sk != NULL) | |
36f41f8f | 281 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); |
1da177e4 | 282 | |
6f961068 | 283 | kfree_skb(skb2); |
1da177e4 LT |
284 | kfree_skb(skb); |
285 | return err; | |
286 | } | |
287 | ||
05238204 TT |
288 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
289 | { | |
12a169e7 | 290 | struct sadb_msg *hdr; |
05238204 TT |
291 | int rc; |
292 | ||
89e357d8 YS |
293 | mutex_lock(&pfk->dump_lock); |
294 | if (!pfk->dump.dump) { | |
295 | rc = 0; | |
296 | goto out; | |
297 | } | |
298 | ||
05238204 | 299 | rc = pfk->dump.dump(pfk); |
89e357d8 YS |
300 | if (rc == -ENOBUFS) { |
301 | rc = 0; | |
302 | goto out; | |
303 | } | |
05238204 | 304 | |
12a169e7 | 305 | if (pfk->dump.skb) { |
89e357d8 YS |
306 | if (!pfkey_can_dump(&pfk->sk)) { |
307 | rc = 0; | |
308 | goto out; | |
309 | } | |
12a169e7 HX |
310 | |
311 | hdr = (struct sadb_msg *) pfk->dump.skb->data; | |
312 | hdr->sadb_msg_seq = 0; | |
313 | hdr->sadb_msg_errno = rc; | |
36f41f8f | 314 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 315 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
316 | pfk->dump.skb = NULL; |
317 | } | |
318 | ||
05238204 | 319 | pfkey_terminate_dump(pfk); |
89e357d8 YS |
320 | |
321 | out: | |
322 | mutex_unlock(&pfk->dump_lock); | |
05238204 TT |
323 | return rc; |
324 | } | |
325 | ||
4c93fbb0 DM |
326 | static inline void pfkey_hdr_dup(struct sadb_msg *new, |
327 | const struct sadb_msg *orig) | |
1da177e4 LT |
328 | { |
329 | *new = *orig; | |
330 | } | |
331 | ||
4c93fbb0 | 332 | static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk) |
1da177e4 LT |
333 | { |
334 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
335 | struct sadb_msg *hdr; | |
336 | ||
337 | if (!skb) | |
338 | return -ENOBUFS; | |
339 | ||
340 | /* Woe be to the platform trying to support PFKEY yet | |
341 | * having normal errnos outside the 1-255 range, inclusive. | |
342 | */ | |
343 | err = -err; | |
344 | if (err == ERESTARTSYS || | |
345 | err == ERESTARTNOHAND || | |
346 | err == ERESTARTNOINTR) | |
347 | err = EINTR; | |
348 | if (err >= 512) | |
349 | err = EINVAL; | |
09a62660 | 350 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 | 351 | |
4df864c1 | 352 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
353 | pfkey_hdr_dup(hdr, orig); |
354 | hdr->sadb_msg_errno = (uint8_t) err; | |
355 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
356 | sizeof(uint64_t)); | |
357 | ||
36f41f8f | 358 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
359 | |
360 | return 0; | |
361 | } | |
362 | ||
8603b955 | 363 | static const u8 sadb_ext_min_len[] = { |
1da177e4 LT |
364 | [SADB_EXT_RESERVED] = (u8) 0, |
365 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
366 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
367 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
368 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
369 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
370 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
371 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
372 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
373 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
374 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
375 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
376 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
377 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
378 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
379 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
380 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
381 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
382 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
383 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
384 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
385 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
386 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
387 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 388 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
13c1d189 | 389 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
d2c5f658 | 390 | [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter), |
1da177e4 LT |
391 | }; |
392 | ||
393 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
4c93fbb0 | 394 | static int verify_address_len(const void *p) |
1da177e4 | 395 | { |
4c93fbb0 DM |
396 | const struct sadb_address *sp = p; |
397 | const struct sockaddr *addr = (const struct sockaddr *)(sp + 1); | |
398 | const struct sockaddr_in *sin; | |
dfd56b8b | 399 | #if IS_ENABLED(CONFIG_IPV6) |
4c93fbb0 | 400 | const struct sockaddr_in6 *sin6; |
1da177e4 LT |
401 | #endif |
402 | int len; | |
403 | ||
06b335cb EB |
404 | if (sp->sadb_address_len < |
405 | DIV_ROUND_UP(sizeof(*sp) + offsetofend(typeof(*addr), sa_family), | |
406 | sizeof(uint64_t))) | |
407 | return -EINVAL; | |
408 | ||
1da177e4 LT |
409 | switch (addr->sa_family) { |
410 | case AF_INET: | |
356f89e1 | 411 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
412 | if (sp->sadb_address_len != len || |
413 | sp->sadb_address_prefixlen > 32) | |
414 | return -EINVAL; | |
415 | break; | |
dfd56b8b | 416 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 417 | case AF_INET6: |
356f89e1 | 418 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
419 | if (sp->sadb_address_len != len || |
420 | sp->sadb_address_prefixlen > 128) | |
421 | return -EINVAL; | |
422 | break; | |
423 | #endif | |
424 | default: | |
425 | /* It is user using kernel to keep track of security | |
426 | * associations for another protocol, such as | |
427 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
428 | * lengths. | |
429 | * | |
430 | * XXX Actually, association/policy database is not yet | |
431 | * XXX able to cope with arbitrary sockaddr families. | |
432 | * XXX When it can, remove this -EINVAL. -DaveM | |
433 | */ | |
434 | return -EINVAL; | |
3ff50b79 | 435 | } |
1da177e4 LT |
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; | |
536 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
537 | ext_type == SADB_EXT_ADDRESS_DST || | |
538 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
539 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
540 | if (verify_address_len(p)) | |
541 | return -EINVAL; | |
8ff24541 | 542 | } |
df71837d TJ |
543 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
544 | if (verify_sec_ctx_len(p)) | |
545 | return -EINVAL; | |
546 | } | |
4c93fbb0 | 547 | ext_hdrs[ext_type-1] = (void *) p; |
1da177e4 LT |
548 | } |
549 | p += ext_len; | |
550 | len -= ext_len; | |
551 | } | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static uint16_t | |
557 | pfkey_satype2proto(uint8_t satype) | |
558 | { | |
559 | switch (satype) { | |
560 | case SADB_SATYPE_UNSPEC: | |
561 | return IPSEC_PROTO_ANY; | |
562 | case SADB_SATYPE_AH: | |
563 | return IPPROTO_AH; | |
564 | case SADB_SATYPE_ESP: | |
565 | return IPPROTO_ESP; | |
566 | case SADB_X_SATYPE_IPCOMP: | |
567 | return IPPROTO_COMP; | |
1da177e4 LT |
568 | default: |
569 | return 0; | |
570 | } | |
571 | /* NOTREACHED */ | |
572 | } | |
573 | ||
574 | static uint8_t | |
575 | pfkey_proto2satype(uint16_t proto) | |
576 | { | |
577 | switch (proto) { | |
578 | case IPPROTO_AH: | |
579 | return SADB_SATYPE_AH; | |
580 | case IPPROTO_ESP: | |
581 | return SADB_SATYPE_ESP; | |
582 | case IPPROTO_COMP: | |
583 | return SADB_X_SATYPE_IPCOMP; | |
1da177e4 LT |
584 | default: |
585 | return 0; | |
586 | } | |
587 | /* NOTREACHED */ | |
588 | } | |
589 | ||
590 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
591 | * say specifically 'just raw sockets' as we encode them as 255. | |
592 | */ | |
593 | ||
594 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
595 | { | |
a02cec21 | 596 | return proto == IPSEC_PROTO_ANY ? 0 : proto; |
1da177e4 LT |
597 | } |
598 | ||
599 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
600 | { | |
a02cec21 | 601 | return proto ? proto : IPSEC_PROTO_ANY; |
1da177e4 LT |
602 | } |
603 | ||
9e8b4ed8 YH |
604 | static inline int pfkey_sockaddr_len(sa_family_t family) |
605 | { | |
606 | switch (family) { | |
607 | case AF_INET: | |
608 | return sizeof(struct sockaddr_in); | |
dfd56b8b | 609 | #if IS_ENABLED(CONFIG_IPV6) |
9e8b4ed8 YH |
610 | case AF_INET6: |
611 | return sizeof(struct sockaddr_in6); | |
612 | #endif | |
613 | } | |
614 | return 0; | |
615 | } | |
616 | ||
5f95ac91 YH |
617 | static |
618 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 619 | { |
5f95ac91 | 620 | switch (sa->sa_family) { |
1da177e4 | 621 | case AF_INET: |
8ff24541 | 622 | xaddr->a4 = |
5f95ac91 | 623 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 | 624 | return AF_INET; |
dfd56b8b | 625 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 626 | case AF_INET6: |
8ff24541 | 627 | memcpy(xaddr->a6, |
5f95ac91 | 628 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
629 | sizeof(struct in6_addr)); |
630 | return AF_INET6; | |
631 | #endif | |
1da177e4 | 632 | } |
5f95ac91 YH |
633 | return 0; |
634 | } | |
635 | ||
636 | static | |
4c93fbb0 | 637 | int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr) |
5f95ac91 YH |
638 | { |
639 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
640 | xaddr); | |
1da177e4 LT |
641 | } |
642 | ||
4c93fbb0 | 643 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 644 | { |
4c93fbb0 DM |
645 | const struct sadb_sa *sa; |
646 | const struct sadb_address *addr; | |
1da177e4 LT |
647 | uint16_t proto; |
648 | unsigned short family; | |
649 | xfrm_address_t *xaddr; | |
650 | ||
ea110733 | 651 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
652 | if (sa == NULL) |
653 | return NULL; | |
654 | ||
655 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
656 | if (proto == 0) | |
657 | return NULL; | |
658 | ||
659 | /* sadb_address_len should be checked by caller */ | |
ea110733 | 660 | addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
1da177e4 LT |
661 | if (addr == NULL) |
662 | return NULL; | |
663 | ||
4c93fbb0 | 664 | family = ((const struct sockaddr *)(addr + 1))->sa_family; |
1da177e4 LT |
665 | switch (family) { |
666 | case AF_INET: | |
4c93fbb0 | 667 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr; |
1da177e4 | 668 | break; |
dfd56b8b | 669 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 670 | case AF_INET6: |
4c93fbb0 | 671 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr; |
1da177e4 LT |
672 | break; |
673 | #endif | |
674 | default: | |
675 | xaddr = NULL; | |
676 | } | |
677 | ||
678 | if (!xaddr) | |
679 | return NULL; | |
680 | ||
bd55775c | 681 | return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family); |
1da177e4 LT |
682 | } |
683 | ||
684 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 685 | |
1da177e4 LT |
686 | static int |
687 | pfkey_sockaddr_size(sa_family_t family) | |
688 | { | |
9e8b4ed8 | 689 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
690 | } |
691 | ||
55569ce2 KM |
692 | static inline int pfkey_mode_from_xfrm(int mode) |
693 | { | |
694 | switch(mode) { | |
695 | case XFRM_MODE_TRANSPORT: | |
696 | return IPSEC_MODE_TRANSPORT; | |
697 | case XFRM_MODE_TUNNEL: | |
698 | return IPSEC_MODE_TUNNEL; | |
699 | case XFRM_MODE_BEET: | |
700 | return IPSEC_MODE_BEET; | |
701 | default: | |
702 | return -1; | |
703 | } | |
704 | } | |
705 | ||
706 | static inline int pfkey_mode_to_xfrm(int mode) | |
707 | { | |
708 | switch(mode) { | |
709 | case IPSEC_MODE_ANY: /*XXX*/ | |
710 | case IPSEC_MODE_TRANSPORT: | |
711 | return XFRM_MODE_TRANSPORT; | |
712 | case IPSEC_MODE_TUNNEL: | |
713 | return XFRM_MODE_TUNNEL; | |
714 | case IPSEC_MODE_BEET: | |
715 | return XFRM_MODE_BEET; | |
716 | default: | |
717 | return -1; | |
718 | } | |
719 | } | |
720 | ||
183cad12 | 721 | static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port, |
4c93fbb0 DM |
722 | struct sockaddr *sa, |
723 | unsigned short family) | |
e5b56652 YH |
724 | { |
725 | switch (family) { | |
726 | case AF_INET: | |
727 | { | |
728 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
729 | sin->sin_family = AF_INET; | |
730 | sin->sin_port = port; | |
731 | sin->sin_addr.s_addr = xaddr->a4; | |
732 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
733 | return 32; | |
734 | } | |
dfd56b8b | 735 | #if IS_ENABLED(CONFIG_IPV6) |
e5b56652 YH |
736 | case AF_INET6: |
737 | { | |
738 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
739 | sin6->sin6_family = AF_INET6; | |
740 | sin6->sin6_port = port; | |
741 | sin6->sin6_flowinfo = 0; | |
15e318bd | 742 | sin6->sin6_addr = xaddr->in6; |
e5b56652 YH |
743 | sin6->sin6_scope_id = 0; |
744 | return 128; | |
745 | } | |
746 | #endif | |
747 | } | |
748 | return 0; | |
749 | } | |
750 | ||
4c93fbb0 | 751 | static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, |
050f009e | 752 | int add_keys, int hsc) |
1da177e4 LT |
753 | { |
754 | struct sk_buff *skb; | |
755 | struct sadb_msg *hdr; | |
756 | struct sadb_sa *sa; | |
757 | struct sadb_lifetime *lifetime; | |
758 | struct sadb_address *addr; | |
759 | struct sadb_key *key; | |
760 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
761 | struct sadb_x_sec_ctx *sec_ctx; |
762 | struct xfrm_sec_ctx *xfrm_ctx; | |
763 | int ctx_size = 0; | |
1da177e4 LT |
764 | int size; |
765 | int auth_key_size = 0; | |
766 | int encrypt_key_size = 0; | |
767 | int sockaddr_size; | |
768 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 769 | int mode; |
1da177e4 LT |
770 | |
771 | /* address family check */ | |
772 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
773 | if (!sockaddr_size) | |
774 | return ERR_PTR(-EINVAL); | |
775 | ||
776 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
777 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 778 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
779 | sizeof(struct sadb_lifetime) + |
780 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
781 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 782 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
783 | sockaddr_size*2 + |
784 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
785 | |
786 | if ((xfrm_ctx = x->security)) { | |
787 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
788 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
789 | } | |
790 | ||
1da177e4 | 791 | /* identity & sensitivity */ |
70e94e66 | 792 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
793 | size += sizeof(struct sadb_address) + sockaddr_size; |
794 | ||
795 | if (add_keys) { | |
796 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
797 | auth_key_size = |
798 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
799 | size += sizeof(struct sadb_key) + auth_key_size; |
800 | } | |
801 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
802 | encrypt_key_size = |
803 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
804 | size += sizeof(struct sadb_key) + encrypt_key_size; |
805 | } | |
806 | } | |
807 | if (x->encap) | |
808 | natt = x->encap; | |
809 | ||
810 | if (natt && natt->encap_type) { | |
811 | size += sizeof(struct sadb_x_nat_t_type); | |
812 | size += sizeof(struct sadb_x_nat_t_port); | |
813 | size += sizeof(struct sadb_x_nat_t_port); | |
814 | } | |
815 | ||
816 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
817 | if (skb == NULL) | |
818 | return ERR_PTR(-ENOBUFS); | |
819 | ||
820 | /* call should fill header later */ | |
4df864c1 | 821 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
822 | memset(hdr, 0, size); /* XXX do we need this ? */ |
823 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
824 | ||
825 | /* sa */ | |
4df864c1 | 826 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
827 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
828 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
829 | sa->sadb_sa_spi = x->id.spi; | |
830 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
831 | switch (x->km.state) { |
832 | case XFRM_STATE_VALID: | |
833 | sa->sadb_sa_state = x->km.dying ? | |
834 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
835 | break; | |
836 | case XFRM_STATE_ACQ: | |
1da177e4 | 837 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
838 | break; |
839 | default: | |
1da177e4 | 840 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
841 | break; |
842 | } | |
1da177e4 LT |
843 | sa->sadb_sa_auth = 0; |
844 | if (x->aalg) { | |
845 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
7e50f84c JK |
846 | sa->sadb_sa_auth = (a && a->pfkey_supported) ? |
847 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
848 | } |
849 | sa->sadb_sa_encrypt = 0; | |
850 | BUG_ON(x->ealg && x->calg); | |
851 | if (x->ealg) { | |
852 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
7e50f84c JK |
853 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
854 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
855 | } |
856 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
857 | if (x->calg) { | |
858 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
7e50f84c JK |
859 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
860 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
861 | } |
862 | ||
863 | sa->sadb_sa_flags = 0; | |
864 | if (x->props.flags & XFRM_STATE_NOECN) | |
865 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
866 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
867 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
868 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
869 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
870 | |
871 | /* hard time */ | |
872 | if (hsc & 2) { | |
4df864c1 | 873 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
874 | lifetime->sadb_lifetime_len = |
875 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
876 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
877 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
878 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
879 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
880 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
881 | } | |
882 | /* soft time */ | |
883 | if (hsc & 1) { | |
4df864c1 | 884 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
885 | lifetime->sadb_lifetime_len = |
886 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
887 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
888 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
889 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
890 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
891 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
892 | } | |
893 | /* current time */ | |
4df864c1 | 894 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
895 | lifetime->sadb_lifetime_len = |
896 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
897 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
898 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
899 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
900 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
901 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
902 | /* src address */ | |
4df864c1 | 903 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 904 | addr->sadb_address_len = |
1da177e4 LT |
905 | (sizeof(struct sadb_address)+sockaddr_size)/ |
906 | sizeof(uint64_t); | |
907 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
908 | /* "if the ports are non-zero, then the sadb_address_proto field, |
909 | normally zero, MUST be filled in with the transport | |
1da177e4 | 910 | protocol's number." - RFC2367 */ |
8ff24541 | 911 | addr->sadb_address_proto = 0; |
1da177e4 | 912 | addr->sadb_address_reserved = 0; |
1da177e4 | 913 | |
e5b56652 YH |
914 | addr->sadb_address_prefixlen = |
915 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
916 | (struct sockaddr *) (addr + 1), | |
917 | x->props.family); | |
918 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
919 | BUG(); |
920 | ||
921 | /* dst address */ | |
4df864c1 | 922 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 923 | addr->sadb_address_len = |
1da177e4 LT |
924 | (sizeof(struct sadb_address)+sockaddr_size)/ |
925 | sizeof(uint64_t); | |
926 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 927 | addr->sadb_address_proto = 0; |
1da177e4 | 928 | addr->sadb_address_reserved = 0; |
1da177e4 | 929 | |
e5b56652 YH |
930 | addr->sadb_address_prefixlen = |
931 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
932 | (struct sockaddr *) (addr + 1), | |
933 | x->props.family); | |
934 | if (!addr->sadb_address_prefixlen) | |
935 | BUG(); | |
1da177e4 | 936 | |
70e94e66 YH |
937 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, |
938 | x->props.family)) { | |
4df864c1 JB |
939 | addr = skb_put(skb, |
940 | sizeof(struct sadb_address) + sockaddr_size); | |
e5b56652 YH |
941 | addr->sadb_address_len = |
942 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
943 | sizeof(uint64_t); | |
944 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
945 | addr->sadb_address_proto = | |
946 | pfkey_proto_from_xfrm(x->sel.proto); | |
947 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
948 | addr->sadb_address_reserved = 0; | |
1da177e4 | 949 | |
e5b56652 YH |
950 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
951 | (struct sockaddr *) (addr + 1), | |
952 | x->props.family); | |
1da177e4 | 953 | } |
1da177e4 LT |
954 | |
955 | /* auth key */ | |
956 | if (add_keys && auth_key_size) { | |
4df864c1 | 957 | key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size); |
1da177e4 LT |
958 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / |
959 | sizeof(uint64_t); | |
960 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
961 | key->sadb_key_bits = x->aalg->alg_key_len; | |
962 | key->sadb_key_reserved = 0; | |
963 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
964 | } | |
965 | /* encrypt key */ | |
966 | if (add_keys && encrypt_key_size) { | |
4df864c1 | 967 | key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size); |
8ff24541 | 968 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
969 | encrypt_key_size) / sizeof(uint64_t); |
970 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
971 | key->sadb_key_bits = x->ealg->alg_key_len; | |
972 | key->sadb_key_reserved = 0; | |
8ff24541 | 973 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
974 | (x->ealg->alg_key_len+7)/8); |
975 | } | |
976 | ||
977 | /* sa */ | |
4df864c1 | 978 | sa2 = skb_put(skb, sizeof(struct sadb_x_sa2)); |
1da177e4 LT |
979 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); |
980 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
981 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
982 | kfree_skb(skb); | |
983 | return ERR_PTR(-EINVAL); | |
984 | } | |
985 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
986 | sa2->sadb_x_sa2_reserved1 = 0; |
987 | sa2->sadb_x_sa2_reserved2 = 0; | |
988 | sa2->sadb_x_sa2_sequence = 0; | |
989 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
990 | ||
991 | if (natt && natt->encap_type) { | |
992 | struct sadb_x_nat_t_type *n_type; | |
993 | struct sadb_x_nat_t_port *n_port; | |
994 | ||
995 | /* type */ | |
4df864c1 | 996 | n_type = skb_put(skb, sizeof(*n_type)); |
1da177e4 LT |
997 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); |
998 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
999 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
1000 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
1001 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
1002 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
1003 | ||
1004 | /* source port */ | |
4df864c1 | 1005 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
1006 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
1007 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
1008 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
1009 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1010 | ||
1011 | /* dest 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_DPORT; | |
1015 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
1016 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1017 | } | |
1018 | ||
df71837d TJ |
1019 | /* security context */ |
1020 | if (xfrm_ctx) { | |
4df864c1 JB |
1021 | sec_ctx = skb_put(skb, |
1022 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
df71837d TJ |
1023 | sec_ctx->sadb_x_sec_len = |
1024 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1025 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1026 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1027 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1028 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1029 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1030 | xfrm_ctx->ctx_len); | |
1031 | } | |
1032 | ||
1da177e4 LT |
1033 | return skb; |
1034 | } | |
1035 | ||
050f009e | 1036 | |
4c93fbb0 | 1037 | static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x) |
050f009e HX |
1038 | { |
1039 | struct sk_buff *skb; | |
1040 | ||
050f009e | 1041 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1042 | |
1043 | return skb; | |
1044 | } | |
1045 | ||
4c93fbb0 | 1046 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x, |
050f009e HX |
1047 | int hsc) |
1048 | { | |
1049 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1050 | } | |
1051 | ||
07fb0f17 | 1052 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
4c93fbb0 DM |
1053 | const struct sadb_msg *hdr, |
1054 | void * const *ext_hdrs) | |
1da177e4 | 1055 | { |
8ff24541 | 1056 | struct xfrm_state *x; |
4c93fbb0 DM |
1057 | const struct sadb_lifetime *lifetime; |
1058 | const struct sadb_sa *sa; | |
1059 | const struct sadb_key *key; | |
1060 | const struct sadb_x_sec_ctx *sec_ctx; | |
1da177e4 LT |
1061 | uint16_t proto; |
1062 | int err; | |
8ff24541 | 1063 | |
1da177e4 | 1064 | |
ea110733 | 1065 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
1066 | if (!sa || |
1067 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1068 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1069 | return ERR_PTR(-EINVAL); | |
1070 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1071 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1072 | return ERR_PTR(-EINVAL); | |
1073 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1074 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1075 | return ERR_PTR(-EINVAL); | |
1076 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1077 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1078 | return ERR_PTR(-EINVAL); | |
1079 | ||
1080 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1081 | if (proto == 0) | |
1082 | return ERR_PTR(-EINVAL); | |
1083 | ||
1084 | /* default error is no buffer space */ | |
1085 | err = -ENOBUFS; | |
1086 | ||
1087 | /* RFC2367: | |
1088 | ||
1089 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1090 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1091 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1092 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1093 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1094 | not true. | |
1095 | ||
8ff24541 | 1096 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1097 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1098 | */ | |
1099 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1100 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1101 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1102 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1103 | return ERR_PTR(-EINVAL); | |
ea110733 | 1104 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1105 | if (key != NULL && |
1106 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1107 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1108 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1109 | return ERR_PTR(-EINVAL); | |
1110 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1111 | if (key != NULL && | |
1112 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1113 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1114 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1115 | return ERR_PTR(-EINVAL); | |
1116 | ||
07fb0f17 | 1117 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1118 | if (x == NULL) |
1119 | return ERR_PTR(-ENOBUFS); | |
1120 | ||
1121 | x->id.proto = proto; | |
1122 | x->id.spi = sa->sadb_sa_spi; | |
33fce60d FD |
1123 | x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay, |
1124 | (sizeof(x->replay.bitmap) * 8)); | |
1da177e4 LT |
1125 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) |
1126 | x->props.flags |= XFRM_STATE_NOECN; | |
1127 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1128 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1129 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1130 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 | 1131 | |
ea110733 | 1132 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1]; |
1da177e4 LT |
1133 | if (lifetime != NULL) { |
1134 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1135 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1136 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1137 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1138 | } | |
ea110733 | 1139 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1]; |
1da177e4 LT |
1140 | if (lifetime != NULL) { |
1141 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1142 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1143 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1144 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1145 | } | |
df71837d | 1146 | |
ea110733 | 1147 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 1148 | if (sec_ctx != NULL) { |
87536a81 | 1149 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
1150 | |
1151 | if (!uctx) | |
1152 | goto out; | |
1153 | ||
1154 | err = security_xfrm_state_alloc(x, uctx); | |
1155 | kfree(uctx); | |
1156 | ||
1157 | if (err) | |
1158 | goto out; | |
1159 | } | |
1160 | ||
e747f643 | 1161 | err = -ENOBUFS; |
ea110733 | 1162 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1163 | if (sa->sadb_sa_auth) { |
1164 | int keysize = 0; | |
1165 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
7e50f84c | 1166 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1167 | err = -ENOSYS; |
1168 | goto out; | |
1169 | } | |
1170 | if (key) | |
1171 | keysize = (key->sadb_key_bits + 7) / 8; | |
1172 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1173 | if (!x->aalg) { |
1174 | err = -ENOMEM; | |
1da177e4 | 1175 | goto out; |
1e3d0c2c | 1176 | } |
1da177e4 LT |
1177 | strcpy(x->aalg->alg_name, a->name); |
1178 | x->aalg->alg_key_len = 0; | |
1179 | if (key) { | |
1180 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1181 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1182 | } | |
c20a66f4 | 1183 | x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1da177e4 LT |
1184 | x->props.aalgo = sa->sadb_sa_auth; |
1185 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1186 | } | |
1187 | if (sa->sadb_sa_encrypt) { | |
1188 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1189 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1190 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1191 | err = -ENOSYS; |
1192 | goto out; | |
1193 | } | |
1194 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1e3d0c2c DC |
1195 | if (!x->calg) { |
1196 | err = -ENOMEM; | |
1da177e4 | 1197 | goto out; |
1e3d0c2c | 1198 | } |
1da177e4 LT |
1199 | strcpy(x->calg->alg_name, a->name); |
1200 | x->props.calgo = sa->sadb_sa_encrypt; | |
1201 | } else { | |
1202 | int keysize = 0; | |
1203 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1204 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1205 | err = -ENOSYS; |
1206 | goto out; | |
1207 | } | |
1208 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1209 | if (key) | |
1210 | keysize = (key->sadb_key_bits + 7) / 8; | |
1211 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1212 | if (!x->ealg) { |
1213 | err = -ENOMEM; | |
1da177e4 | 1214 | goto out; |
1e3d0c2c | 1215 | } |
1da177e4 LT |
1216 | strcpy(x->ealg->alg_name, a->name); |
1217 | x->ealg->alg_key_len = 0; | |
1218 | if (key) { | |
1219 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1220 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1221 | } | |
1222 | x->props.ealgo = sa->sadb_sa_encrypt; | |
69b0137f | 1223 | x->geniv = a->uinfo.encr.geniv; |
1da177e4 LT |
1224 | } |
1225 | } | |
1226 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1227 | ||
8ff24541 | 1228 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 | 1229 | &x->props.saddr); |
8ff24541 | 1230 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1231 | &x->id.daddr); |
1232 | ||
1233 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
4c93fbb0 | 1234 | const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1]; |
55569ce2 KM |
1235 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1236 | if (mode < 0) { | |
1237 | err = -EINVAL; | |
1238 | goto out; | |
1239 | } | |
1240 | x->props.mode = mode; | |
1da177e4 LT |
1241 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1242 | } | |
1243 | ||
1244 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
4c93fbb0 | 1245 | const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; |
1da177e4 LT |
1246 | |
1247 | /* Nobody uses this, but we try. */ | |
1248 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1249 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1250 | } | |
1251 | ||
4da51056 | 1252 | if (!x->sel.family) |
4a4b6271 JL |
1253 | x->sel.family = x->props.family; |
1254 | ||
1da177e4 | 1255 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
4c93fbb0 | 1256 | const struct sadb_x_nat_t_type* n_type; |
1da177e4 LT |
1257 | struct xfrm_encap_tmpl *natt; |
1258 | ||
1259 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1e3d0c2c DC |
1260 | if (!x->encap) { |
1261 | err = -ENOMEM; | |
1da177e4 | 1262 | goto out; |
1e3d0c2c | 1263 | } |
1da177e4 LT |
1264 | |
1265 | natt = x->encap; | |
1266 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1267 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1268 | ||
1269 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
4c93fbb0 | 1270 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1271 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; |
1272 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1273 | } | |
1274 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
4c93fbb0 | 1275 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1276 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; |
1277 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1278 | } | |
a8d694c6 | 1279 | memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1da177e4 LT |
1280 | } |
1281 | ||
72cb6962 HX |
1282 | err = xfrm_init_state(x); |
1283 | if (err) | |
1da177e4 | 1284 | goto out; |
72cb6962 | 1285 | |
1da177e4 | 1286 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1287 | return x; |
1288 | ||
1289 | out: | |
1290 | x->km.state = XFRM_STATE_DEAD; | |
1291 | xfrm_state_put(x); | |
1292 | return ERR_PTR(err); | |
1293 | } | |
1294 | ||
4c93fbb0 | 1295 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1296 | { |
1297 | return -EOPNOTSUPP; | |
1298 | } | |
1299 | ||
4c93fbb0 | 1300 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1301 | { |
07fb0f17 | 1302 | struct net *net = sock_net(sk); |
1da177e4 LT |
1303 | struct sk_buff *resp_skb; |
1304 | struct sadb_x_sa2 *sa2; | |
1305 | struct sadb_address *saddr, *daddr; | |
1306 | struct sadb_msg *out_hdr; | |
658b219e | 1307 | struct sadb_spirange *range; |
1da177e4 | 1308 | struct xfrm_state *x = NULL; |
55569ce2 | 1309 | int mode; |
658b219e HX |
1310 | int err; |
1311 | u32 min_spi, max_spi; | |
1da177e4 LT |
1312 | u32 reqid; |
1313 | u8 proto; | |
1314 | unsigned short family; | |
1315 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1316 | ||
1317 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1318 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1319 | return -EINVAL; | |
1320 | ||
1321 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1322 | if (proto == 0) | |
1323 | return -EINVAL; | |
1324 | ||
1325 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1326 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1327 | if (mode < 0) | |
1328 | return -EINVAL; | |
1da177e4 LT |
1329 | reqid = sa2->sadb_x_sa2_reqid; |
1330 | } else { | |
1331 | mode = 0; | |
1332 | reqid = 0; | |
1333 | } | |
1334 | ||
1335 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1336 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1337 | ||
1338 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1339 | switch (family) { | |
1340 | case AF_INET: | |
1341 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1342 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1343 | break; | |
dfd56b8b | 1344 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1345 | case AF_INET6: |
1346 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1347 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1348 | break; | |
1349 | #endif | |
1350 | } | |
1351 | ||
1352 | if (hdr->sadb_msg_seq) { | |
bd55775c | 1353 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
70e94e66 | 1354 | if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) { |
1da177e4 LT |
1355 | xfrm_state_put(x); |
1356 | x = NULL; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | if (!x) | |
bd55775c | 1361 | x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family); |
1da177e4 LT |
1362 | |
1363 | if (x == NULL) | |
1364 | return -ENOENT; | |
1365 | ||
658b219e HX |
1366 | min_spi = 0x100; |
1367 | max_spi = 0x0fffffff; | |
1da177e4 | 1368 | |
658b219e HX |
1369 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1370 | if (range) { | |
1371 | min_spi = range->sadb_spirange_min; | |
1372 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1373 | } |
658b219e | 1374 | |
776e9dd9 FD |
1375 | err = verify_spi_info(x->id.proto, min_spi, max_spi); |
1376 | if (err) { | |
1377 | xfrm_state_put(x); | |
1378 | return err; | |
1379 | } | |
1380 | ||
658b219e | 1381 | err = xfrm_alloc_spi(x, min_spi, max_spi); |
050f009e | 1382 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1383 | |
1384 | if (IS_ERR(resp_skb)) { | |
1385 | xfrm_state_put(x); | |
1386 | return PTR_ERR(resp_skb); | |
1387 | } | |
1388 | ||
1389 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1390 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1391 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1392 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1393 | out_hdr->sadb_msg_errno = 0; | |
1394 | out_hdr->sadb_msg_reserved = 0; | |
1395 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1396 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1397 | ||
1398 | xfrm_state_put(x); | |
1399 | ||
36f41f8f | 1400 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4 LT |
1401 | |
1402 | return 0; | |
1403 | } | |
1404 | ||
4c93fbb0 | 1405 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1406 | { |
07fb0f17 | 1407 | struct net *net = sock_net(sk); |
1da177e4 LT |
1408 | struct xfrm_state *x; |
1409 | ||
1410 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1411 | return -EOPNOTSUPP; | |
1412 | ||
1413 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1414 | return 0; | |
1415 | ||
bd55775c | 1416 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4 LT |
1417 | if (x == NULL) |
1418 | return 0; | |
1419 | ||
1420 | spin_lock_bh(&x->lock); | |
5b8ef341 | 1421 | if (x->km.state == XFRM_STATE_ACQ) |
1da177e4 | 1422 | x->km.state = XFRM_STATE_ERROR; |
5b8ef341 | 1423 | |
1da177e4 LT |
1424 | spin_unlock_bh(&x->lock); |
1425 | xfrm_state_put(x); | |
1426 | return 0; | |
1427 | } | |
1428 | ||
26b15dad JHS |
1429 | static inline int event2poltype(int event) |
1430 | { | |
1431 | switch (event) { | |
f60f6b8f | 1432 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1433 | return SADB_X_SPDDELETE; |
f60f6b8f | 1434 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1435 | return SADB_X_SPDADD; |
f60f6b8f | 1436 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1437 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1438 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1439 | // return SADB_X_SPDEXPIRE; |
1440 | default: | |
207024b9 | 1441 | pr_err("pfkey: Unknown policy event %d\n", event); |
26b15dad JHS |
1442 | break; |
1443 | } | |
1444 | ||
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | static inline int event2keytype(int event) | |
1449 | { | |
1450 | switch (event) { | |
f60f6b8f | 1451 | case XFRM_MSG_DELSA: |
26b15dad | 1452 | return SADB_DELETE; |
f60f6b8f | 1453 | case XFRM_MSG_NEWSA: |
26b15dad | 1454 | return SADB_ADD; |
f60f6b8f | 1455 | case XFRM_MSG_UPDSA: |
26b15dad | 1456 | return SADB_UPDATE; |
f60f6b8f | 1457 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1458 | return SADB_EXPIRE; |
1459 | default: | |
207024b9 | 1460 | pr_err("pfkey: Unknown SA event %d\n", event); |
26b15dad JHS |
1461 | break; |
1462 | } | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | /* ADD/UPD/DEL */ | |
214e005b | 1468 | static int key_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1469 | { |
1470 | struct sk_buff *skb; | |
1471 | struct sadb_msg *hdr; | |
26b15dad | 1472 | |
050f009e | 1473 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1474 | |
1475 | if (IS_ERR(skb)) | |
1476 | return PTR_ERR(skb); | |
1477 | ||
1478 | hdr = (struct sadb_msg *) skb->data; | |
1479 | hdr->sadb_msg_version = PF_KEY_V2; | |
1480 | hdr->sadb_msg_type = event2keytype(c->event); | |
1481 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1482 | hdr->sadb_msg_errno = 0; | |
1483 | hdr->sadb_msg_reserved = 0; | |
1484 | hdr->sadb_msg_seq = c->seq; | |
15e47304 | 1485 | hdr->sadb_msg_pid = c->portid; |
26b15dad | 1486 | |
36f41f8f | 1487 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad JHS |
1488 | |
1489 | return 0; | |
1490 | } | |
1da177e4 | 1491 | |
4c93fbb0 | 1492 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1493 | { |
07fb0f17 | 1494 | struct net *net = sock_net(sk); |
1da177e4 LT |
1495 | struct xfrm_state *x; |
1496 | int err; | |
26b15dad | 1497 | struct km_event c; |
1da177e4 | 1498 | |
07fb0f17 | 1499 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4 LT |
1500 | if (IS_ERR(x)) |
1501 | return PTR_ERR(x); | |
1502 | ||
26b15dad | 1503 | xfrm_state_hold(x); |
1da177e4 LT |
1504 | if (hdr->sadb_msg_type == SADB_ADD) |
1505 | err = xfrm_state_add(x); | |
1506 | else | |
1507 | err = xfrm_state_update(x); | |
1508 | ||
2e71029e | 1509 | xfrm_audit_state_add(x, err ? 0 : 1, true); |
161a09e7 | 1510 | |
1da177e4 LT |
1511 | if (err < 0) { |
1512 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1513 | __xfrm_state_put(x); |
7d6dfe1f | 1514 | goto out; |
1da177e4 LT |
1515 | } |
1516 | ||
26b15dad | 1517 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1518 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1519 | else |
f60f6b8f | 1520 | c.event = XFRM_MSG_UPDSA; |
26b15dad | 1521 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1522 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 1523 | km_state_notify(x, &c); |
7d6dfe1f | 1524 | out: |
26b15dad | 1525 | xfrm_state_put(x); |
26b15dad | 1526 | return err; |
1da177e4 LT |
1527 | } |
1528 | ||
4c93fbb0 | 1529 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1530 | { |
07fb0f17 | 1531 | struct net *net = sock_net(sk); |
1da177e4 | 1532 | struct xfrm_state *x; |
26b15dad JHS |
1533 | struct km_event c; |
1534 | int err; | |
1da177e4 LT |
1535 | |
1536 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1537 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1538 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1539 | return -EINVAL; | |
1540 | ||
07fb0f17 | 1541 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1542 | if (x == NULL) |
1543 | return -ESRCH; | |
1544 | ||
c8c05a8e CZ |
1545 | if ((err = security_xfrm_state_delete(x))) |
1546 | goto out; | |
1547 | ||
1da177e4 | 1548 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1549 | err = -EPERM; |
1550 | goto out; | |
1da177e4 | 1551 | } |
161a09e7 | 1552 | |
26b15dad | 1553 | err = xfrm_state_delete(x); |
161a09e7 | 1554 | |
c8c05a8e CZ |
1555 | if (err < 0) |
1556 | goto out; | |
1da177e4 | 1557 | |
26b15dad | 1558 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1559 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1560 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1561 | km_state_notify(x, &c); |
c8c05a8e | 1562 | out: |
2e71029e | 1563 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
26b15dad | 1564 | xfrm_state_put(x); |
1da177e4 | 1565 | |
26b15dad | 1566 | return err; |
1da177e4 LT |
1567 | } |
1568 | ||
4c93fbb0 | 1569 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1570 | { |
07fb0f17 | 1571 | struct net *net = sock_net(sk); |
1da177e4 LT |
1572 | __u8 proto; |
1573 | struct sk_buff *out_skb; | |
1574 | struct sadb_msg *out_hdr; | |
1575 | struct xfrm_state *x; | |
1576 | ||
1577 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1578 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1579 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1580 | return -EINVAL; | |
1581 | ||
07fb0f17 | 1582 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1583 | if (x == NULL) |
1584 | return -ESRCH; | |
1585 | ||
050f009e | 1586 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1587 | proto = x->id.proto; |
1588 | xfrm_state_put(x); | |
1589 | if (IS_ERR(out_skb)) | |
1590 | return PTR_ERR(out_skb); | |
1591 | ||
1592 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1593 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1594 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1595 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1596 | out_hdr->sadb_msg_errno = 0; | |
1597 | out_hdr->sadb_msg_reserved = 0; | |
1598 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1599 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 1600 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
1601 | |
1602 | return 0; | |
1603 | } | |
1604 | ||
4c93fbb0 | 1605 | static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, |
dd0fc66f | 1606 | gfp_t allocation) |
1da177e4 LT |
1607 | { |
1608 | struct sk_buff *skb; | |
1609 | struct sadb_msg *hdr; | |
1610 | int len, auth_len, enc_len, i; | |
1611 | ||
7e50f84c | 1612 | auth_len = xfrm_count_pfkey_auth_supported(); |
1da177e4 LT |
1613 | if (auth_len) { |
1614 | auth_len *= sizeof(struct sadb_alg); | |
1615 | auth_len += sizeof(struct sadb_supported); | |
1616 | } | |
8ff24541 | 1617 | |
7e50f84c | 1618 | enc_len = xfrm_count_pfkey_enc_supported(); |
1da177e4 LT |
1619 | if (enc_len) { |
1620 | enc_len *= sizeof(struct sadb_alg); | |
1621 | enc_len += sizeof(struct sadb_supported); | |
1622 | } | |
8ff24541 | 1623 | |
1da177e4 LT |
1624 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1625 | ||
1626 | skb = alloc_skb(len + 16, allocation); | |
1627 | if (!skb) | |
1628 | goto out_put_algs; | |
1629 | ||
4df864c1 | 1630 | hdr = skb_put(skb, sizeof(*hdr)); |
1da177e4 LT |
1631 | pfkey_hdr_dup(hdr, orig); |
1632 | hdr->sadb_msg_errno = 0; | |
1633 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1634 | ||
1635 | if (auth_len) { | |
1636 | struct sadb_supported *sp; | |
1637 | struct sadb_alg *ap; | |
1638 | ||
4df864c1 | 1639 | sp = skb_put(skb, auth_len); |
1da177e4 LT |
1640 | ap = (struct sadb_alg *) (sp + 1); |
1641 | ||
1642 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1643 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1644 | ||
1645 | for (i = 0; ; i++) { | |
1646 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1647 | if (!aalg) | |
1648 | break; | |
7e50f84c JK |
1649 | if (!aalg->pfkey_supported) |
1650 | continue; | |
1da177e4 LT |
1651 | if (aalg->available) |
1652 | *ap++ = aalg->desc; | |
1653 | } | |
1654 | } | |
1655 | ||
1656 | if (enc_len) { | |
1657 | struct sadb_supported *sp; | |
1658 | struct sadb_alg *ap; | |
1659 | ||
4df864c1 | 1660 | sp = skb_put(skb, enc_len); |
1da177e4 LT |
1661 | ap = (struct sadb_alg *) (sp + 1); |
1662 | ||
1663 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1664 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1665 | ||
1666 | for (i = 0; ; i++) { | |
1667 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1668 | if (!ealg) | |
1669 | break; | |
7e50f84c JK |
1670 | if (!ealg->pfkey_supported) |
1671 | continue; | |
1da177e4 LT |
1672 | if (ealg->available) |
1673 | *ap++ = ealg->desc; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | out_put_algs: | |
1678 | return skb; | |
1679 | } | |
1680 | ||
4c93fbb0 | 1681 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1682 | { |
1683 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1684 | struct sk_buff *supp_skb; | |
1685 | ||
1686 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1687 | return -EINVAL; | |
1688 | ||
1689 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1690 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1691 | return -EEXIST; | |
1692 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1693 | } | |
1694 | ||
1695 | xfrm_probe_algs(); | |
8ff24541 | 1696 | |
1da177e4 LT |
1697 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1698 | if (!supp_skb) { | |
1699 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1700 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1701 | ||
1702 | return -ENOBUFS; | |
1703 | } | |
1704 | ||
36f41f8f ED |
1705 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, |
1706 | sock_net(sk)); | |
1da177e4 LT |
1707 | return 0; |
1708 | } | |
1709 | ||
4c93fbb0 | 1710 | static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr) |
8be987d7 JHS |
1711 | { |
1712 | struct sk_buff *skb; | |
1713 | struct sadb_msg *hdr; | |
1714 | ||
1715 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1716 | if (!skb) | |
1717 | return -ENOBUFS; | |
1718 | ||
59ae1d12 | 1719 | hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg)); |
8be987d7 JHS |
1720 | hdr->sadb_msg_errno = (uint8_t) 0; |
1721 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1722 | ||
36f41f8f ED |
1723 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, |
1724 | sock_net(sk)); | |
8be987d7 JHS |
1725 | } |
1726 | ||
214e005b | 1727 | static int key_notify_sa_flush(const struct km_event *c) |
26b15dad JHS |
1728 | { |
1729 | struct sk_buff *skb; | |
1730 | struct sadb_msg *hdr; | |
1731 | ||
1732 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1733 | if (!skb) | |
1734 | return -ENOBUFS; | |
4df864c1 | 1735 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
bf08867f | 1736 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1737 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad | 1738 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 1739 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
1740 | hdr->sadb_msg_version = PF_KEY_V2; |
1741 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1742 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
a5cc68f3 | 1743 | hdr->sadb_msg_reserved = 0; |
26b15dad | 1744 | |
36f41f8f | 1745 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad JHS |
1746 | |
1747 | return 0; | |
1748 | } | |
1749 | ||
4c93fbb0 | 1750 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1751 | { |
07fb0f17 | 1752 | struct net *net = sock_net(sk); |
95c96174 | 1753 | unsigned int proto; |
26b15dad | 1754 | struct km_event c; |
8be987d7 | 1755 | int err, err2; |
1da177e4 LT |
1756 | |
1757 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1758 | if (proto == 0) | |
1759 | return -EINVAL; | |
1760 | ||
2e71029e | 1761 | err = xfrm_state_flush(net, proto, true); |
8be987d7 | 1762 | err2 = unicast_flush_resp(sk, hdr); |
9e64cc95 JHS |
1763 | if (err || err2) { |
1764 | if (err == -ESRCH) /* empty table - go quietly */ | |
1765 | err = 0; | |
8be987d7 | 1766 | return err ? err : err2; |
9e64cc95 | 1767 | } |
8be987d7 | 1768 | |
bf08867f | 1769 | c.data.proto = proto; |
26b15dad | 1770 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1771 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1772 | c.event = XFRM_MSG_FLUSHSA; |
07fb0f17 | 1773 | c.net = net; |
26b15dad | 1774 | km_state_notify(NULL, &c); |
1da177e4 LT |
1775 | |
1776 | return 0; | |
1777 | } | |
1778 | ||
1da177e4 LT |
1779 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1780 | { | |
83321d6b | 1781 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1782 | struct sk_buff *out_skb; |
1783 | struct sadb_msg *out_hdr; | |
1784 | ||
83321d6b TT |
1785 | if (!pfkey_can_dump(&pfk->sk)) |
1786 | return -ENOBUFS; | |
1787 | ||
050f009e | 1788 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1789 | if (IS_ERR(out_skb)) |
1790 | return PTR_ERR(out_skb); | |
1791 | ||
1792 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1793 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1794 | out_hdr->sadb_msg_type = SADB_DUMP; |
1795 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1796 | out_hdr->sadb_msg_errno = 0; | |
1797 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1798 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 1799 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
1800 | |
1801 | if (pfk->dump.skb) | |
36f41f8f | 1802 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 1803 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
1804 | pfk->dump.skb = out_skb; |
1805 | ||
1da177e4 LT |
1806 | return 0; |
1807 | } | |
1808 | ||
83321d6b TT |
1809 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1810 | { | |
07fb0f17 AD |
1811 | struct net *net = sock_net(&pfk->sk); |
1812 | return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); | |
83321d6b TT |
1813 | } |
1814 | ||
1815 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1816 | { | |
283bc9f3 FD |
1817 | struct net *net = sock_net(&pfk->sk); |
1818 | ||
1819 | xfrm_state_walk_done(&pfk->dump.u.state, net); | |
83321d6b TT |
1820 | } |
1821 | ||
4c93fbb0 | 1822 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1823 | { |
1824 | u8 proto; | |
870a2df4 | 1825 | struct xfrm_address_filter *filter = NULL; |
83321d6b TT |
1826 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1827 | ||
89e357d8 YS |
1828 | mutex_lock(&pfk->dump_lock); |
1829 | if (pfk->dump.dump != NULL) { | |
1830 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 1831 | return -EBUSY; |
89e357d8 | 1832 | } |
1da177e4 LT |
1833 | |
1834 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
89e357d8 YS |
1835 | if (proto == 0) { |
1836 | mutex_unlock(&pfk->dump_lock); | |
1da177e4 | 1837 | return -EINVAL; |
89e357d8 | 1838 | } |
1da177e4 | 1839 | |
d3623099 ND |
1840 | if (ext_hdrs[SADB_X_EXT_FILTER - 1]) { |
1841 | struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1]; | |
1842 | ||
1843 | filter = kmalloc(sizeof(*filter), GFP_KERNEL); | |
89e357d8 YS |
1844 | if (filter == NULL) { |
1845 | mutex_unlock(&pfk->dump_lock); | |
d3623099 | 1846 | return -ENOMEM; |
89e357d8 | 1847 | } |
d3623099 ND |
1848 | |
1849 | memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr, | |
1850 | sizeof(xfrm_address_t)); | |
1851 | memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr, | |
1852 | sizeof(xfrm_address_t)); | |
1853 | filter->family = xfilter->sadb_x_filter_family; | |
1854 | filter->splen = xfilter->sadb_x_filter_splen; | |
1855 | filter->dplen = xfilter->sadb_x_filter_dplen; | |
1856 | } | |
1857 | ||
83321d6b | 1858 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 1859 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
1860 | pfk->dump.dump = pfkey_dump_sa; |
1861 | pfk->dump.done = pfkey_dump_sa_done; | |
d3623099 | 1862 | xfrm_state_walk_init(&pfk->dump.u.state, proto, filter); |
89e357d8 | 1863 | mutex_unlock(&pfk->dump_lock); |
4c563f76 | 1864 | |
83321d6b | 1865 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1866 | } |
1867 | ||
4c93fbb0 | 1868 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1869 | { |
1870 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1871 | int satype = hdr->sadb_msg_satype; | |
4c93fbb0 | 1872 | bool reset_errno = false; |
1da177e4 LT |
1873 | |
1874 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
4c93fbb0 | 1875 | reset_errno = true; |
1da177e4 LT |
1876 | if (satype != 0 && satype != 1) |
1877 | return -EINVAL; | |
1878 | pfk->promisc = satype; | |
1879 | } | |
4c93fbb0 DM |
1880 | if (reset_errno && skb_cloned(skb)) |
1881 | skb = skb_copy(skb, GFP_KERNEL); | |
1882 | else | |
1883 | skb = skb_clone(skb, GFP_KERNEL); | |
1884 | ||
1885 | if (reset_errno && skb) { | |
1886 | struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data; | |
1887 | new_hdr->sadb_msg_errno = 0; | |
1888 | } | |
1889 | ||
36f41f8f | 1890 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk)); |
1da177e4 LT |
1891 | return 0; |
1892 | } | |
1893 | ||
1894 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1895 | { | |
1896 | int i; | |
1897 | u32 reqid = *(u32*)ptr; | |
1898 | ||
1899 | for (i=0; i<xp->xfrm_nr; i++) { | |
1900 | if (xp->xfrm_vec[i].reqid == reqid) | |
1901 | return -EEXIST; | |
1902 | } | |
1903 | return 0; | |
1904 | } | |
1905 | ||
07fb0f17 | 1906 | static u32 gen_reqid(struct net *net) |
1da177e4 | 1907 | { |
4c563f76 | 1908 | struct xfrm_policy_walk walk; |
1da177e4 | 1909 | u32 start; |
4c563f76 | 1910 | int rc; |
1da177e4 LT |
1911 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1912 | ||
1913 | start = reqid; | |
1914 | do { | |
1915 | ++reqid; | |
1916 | if (reqid == 0) | |
1917 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 | 1918 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f17 | 1919 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
283bc9f3 | 1920 | xfrm_policy_walk_done(&walk, net); |
4c563f76 | 1921 | if (rc != -EEXIST) |
1da177e4 LT |
1922 | return reqid; |
1923 | } while (reqid != start); | |
1924 | return 0; | |
1925 | } | |
1926 | ||
1927 | static int | |
1928 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1929 | { | |
07fb0f17 | 1930 | struct net *net = xp_net(xp); |
1da177e4 | 1931 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce2 | 1932 | int mode; |
1da177e4 LT |
1933 | |
1934 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1935 | return -ELOOP; | |
1936 | ||
1937 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1938 | return -EINVAL; | |
1939 | ||
1940 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1941 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1942 | return -EINVAL; | |
1943 | t->mode = mode; | |
1da177e4 LT |
1944 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1945 | t->optional = 1; | |
1946 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1947 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1948 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1949 | t->reqid = 0; | |
07fb0f17 | 1950 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4 LT |
1951 | return -ENOBUFS; |
1952 | } | |
1953 | ||
1954 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1955 | if (t->mode == XFRM_MODE_TUNNEL) { |
096f41d3 | 1956 | int err; |
5f95ac91 | 1957 | |
096f41d3 HX |
1958 | err = parse_sockaddr_pair( |
1959 | (struct sockaddr *)(rq + 1), | |
1960 | rq->sadb_x_ipsecrequest_len - sizeof(*rq), | |
1961 | &t->saddr, &t->id.daddr, &t->encap_family); | |
1962 | if (err) | |
1963 | return err; | |
2718aa7c MK |
1964 | } else |
1965 | t->encap_family = xp->family; | |
1966 | ||
1da177e4 | 1967 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1968 | t->allalgs = 1; |
1da177e4 LT |
1969 | xp->xfrm_nr++; |
1970 | return 0; | |
1971 | } | |
1972 | ||
1973 | static int | |
1974 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1975 | { | |
1976 | int err; | |
1977 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1978 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1979 | ||
f674e72f DC |
1980 | if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy)) |
1981 | return -EINVAL; | |
1982 | ||
096f41d3 HX |
1983 | while (len >= sizeof(*rq)) { |
1984 | if (len < rq->sadb_x_ipsecrequest_len || | |
1985 | rq->sadb_x_ipsecrequest_len < sizeof(*rq)) | |
1986 | return -EINVAL; | |
1987 | ||
1da177e4 LT |
1988 | if ((err = parse_ipsecrequest(xp, rq)) < 0) |
1989 | return err; | |
1990 | len -= rq->sadb_x_ipsecrequest_len; | |
1991 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1992 | } | |
1993 | return 0; | |
1994 | } | |
1995 | ||
4c93fbb0 | 1996 | static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp) |
df71837d TJ |
1997 | { |
1998 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1999 | ||
2000 | if (xfrm_ctx) { | |
2001 | int len = sizeof(struct sadb_x_sec_ctx); | |
2002 | len += xfrm_ctx->ctx_len; | |
2003 | return PFKEY_ALIGN8(len); | |
2004 | } | |
2005 | return 0; | |
2006 | } | |
2007 | ||
4c93fbb0 | 2008 | static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp) |
1da177e4 | 2009 | { |
4c93fbb0 | 2010 | const struct xfrm_tmpl *t; |
1da177e4 | 2011 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
2012 | int socklen = 0; |
2013 | int i; | |
2014 | ||
2015 | for (i=0; i<xp->xfrm_nr; i++) { | |
2016 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 2017 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 2018 | } |
1da177e4 LT |
2019 | |
2020 | return sizeof(struct sadb_msg) + | |
2021 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 2022 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
2023 | (sockaddr_size * 2) + |
2024 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
2025 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
2026 | (socklen * 2) + | |
df71837d | 2027 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
2028 | } |
2029 | ||
4c93fbb0 | 2030 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp) |
1da177e4 LT |
2031 | { |
2032 | struct sk_buff *skb; | |
2033 | int size; | |
2034 | ||
2035 | size = pfkey_xfrm_policy2msg_size(xp); | |
2036 | ||
2037 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
2038 | if (skb == NULL) | |
2039 | return ERR_PTR(-ENOBUFS); | |
2040 | ||
2041 | return skb; | |
2042 | } | |
2043 | ||
4c93fbb0 | 2044 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir) |
1da177e4 LT |
2045 | { |
2046 | struct sadb_msg *hdr; | |
2047 | struct sadb_address *addr; | |
2048 | struct sadb_lifetime *lifetime; | |
2049 | struct sadb_x_policy *pol; | |
df71837d TJ |
2050 | struct sadb_x_sec_ctx *sec_ctx; |
2051 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
2052 | int i; |
2053 | int size; | |
2054 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 2055 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
2056 | |
2057 | size = pfkey_xfrm_policy2msg_size(xp); | |
2058 | ||
2059 | /* call should fill header later */ | |
4df864c1 | 2060 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
2061 | memset(hdr, 0, size); /* XXX do we need this ? */ |
2062 | ||
2063 | /* src address */ | |
4df864c1 | 2064 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 2065 | addr->sadb_address_len = |
1da177e4 LT |
2066 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2067 | sizeof(uint64_t); | |
2068 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2069 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
2070 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
2071 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2072 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2073 | xp->selector.sport, | |
2074 | (struct sockaddr *) (addr + 1), | |
2075 | xp->family)) | |
1da177e4 LT |
2076 | BUG(); |
2077 | ||
2078 | /* dst address */ | |
4df864c1 | 2079 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
2080 | addr->sadb_address_len = |
2081 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2082 | sizeof(uint64_t); | |
2083 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2084 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2085 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2086 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2087 | |
2088 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2089 | (struct sockaddr *) (addr + 1), | |
2090 | xp->family); | |
1da177e4 LT |
2091 | |
2092 | /* hard time */ | |
4df864c1 | 2093 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2094 | lifetime->sadb_lifetime_len = |
2095 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2096 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2097 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2098 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2099 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2100 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2101 | /* soft time */ | |
4df864c1 | 2102 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2103 | lifetime->sadb_lifetime_len = |
2104 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2105 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2106 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2107 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2108 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2109 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2110 | /* current time */ | |
4df864c1 | 2111 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2112 | lifetime->sadb_lifetime_len = |
2113 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2114 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2115 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2116 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2117 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2118 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2119 | ||
4df864c1 | 2120 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
2121 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
2122 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2123 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2124 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2125 | if (xp->xfrm_nr) | |
2126 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2127 | else | |
2128 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2129 | } | |
2130 | pol->sadb_x_policy_dir = dir+1; | |
ff862a46 | 2131 | pol->sadb_x_policy_reserved = 0; |
1da177e4 LT |
2132 | pol->sadb_x_policy_id = xp->index; |
2133 | pol->sadb_x_policy_priority = xp->priority; | |
2134 | ||
2135 | for (i=0; i<xp->xfrm_nr; i++) { | |
4c93fbb0 | 2136 | const struct xfrm_tmpl *t = xp->xfrm_vec + i; |
1da177e4 | 2137 | struct sadb_x_ipsecrequest *rq; |
1da177e4 | 2138 | int req_size; |
55569ce2 | 2139 | int mode; |
1da177e4 LT |
2140 | |
2141 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2142 | if (t->mode == XFRM_MODE_TUNNEL) { |
2143 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2144 | req_size += socklen * 2; | |
2145 | } else { | |
1da177e4 | 2146 | size -= 2*socklen; |
e5b56652 | 2147 | } |
4df864c1 | 2148 | rq = skb_put(skb, req_size); |
1da177e4 LT |
2149 | pol->sadb_x_policy_len += req_size/8; |
2150 | memset(rq, 0, sizeof(*rq)); | |
2151 | rq->sadb_x_ipsecrequest_len = req_size; | |
2152 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2153 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2154 | return -EINVAL; | |
fefaa75e | 2155 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2156 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2157 | if (t->reqid) | |
2158 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2159 | if (t->optional) | |
2160 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2161 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2162 | |
7e49e6de | 2163 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2164 | u8 *sa = (void *)(rq + 1); |
2165 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2166 | (struct sockaddr *)sa, | |
2167 | t->encap_family); | |
2168 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2169 | (struct sockaddr *) (sa + socklen), | |
2170 | t->encap_family); | |
1da177e4 LT |
2171 | } |
2172 | } | |
df71837d TJ |
2173 | |
2174 | /* security context */ | |
2175 | if ((xfrm_ctx = xp->security)) { | |
2176 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2177 | ||
4df864c1 | 2178 | sec_ctx = skb_put(skb, ctx_size); |
df71837d TJ |
2179 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); |
2180 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2181 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2182 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2183 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2184 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2185 | xfrm_ctx->ctx_len); | |
2186 | } | |
2187 | ||
1da177e4 | 2188 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
850a6212 | 2189 | hdr->sadb_msg_reserved = refcount_read(&xp->refcnt); |
55569ce2 KM |
2190 | |
2191 | return 0; | |
1da177e4 LT |
2192 | } |
2193 | ||
214e005b | 2194 | static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2195 | { |
2196 | struct sk_buff *out_skb; | |
2197 | struct sadb_msg *out_hdr; | |
2198 | int err; | |
2199 | ||
2200 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
9a127aad DC |
2201 | if (IS_ERR(out_skb)) |
2202 | return PTR_ERR(out_skb); | |
2203 | ||
55569ce2 | 2204 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
1e532d2b SK |
2205 | if (err < 0) { |
2206 | kfree_skb(out_skb); | |
55569ce2 | 2207 | return err; |
1e532d2b | 2208 | } |
26b15dad JHS |
2209 | |
2210 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2211 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2212 | ||
f60f6b8f | 2213 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2214 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2215 | else | |
2216 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2217 | out_hdr->sadb_msg_errno = 0; | |
2218 | out_hdr->sadb_msg_seq = c->seq; | |
15e47304 | 2219 | out_hdr->sadb_msg_pid = c->portid; |
36f41f8f | 2220 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad JHS |
2221 | return 0; |
2222 | ||
2223 | } | |
2224 | ||
4c93fbb0 | 2225 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2226 | { |
07fb0f17 | 2227 | struct net *net = sock_net(sk); |
df71837d | 2228 | int err = 0; |
1da177e4 LT |
2229 | struct sadb_lifetime *lifetime; |
2230 | struct sadb_address *sa; | |
2231 | struct sadb_x_policy *pol; | |
2232 | struct xfrm_policy *xp; | |
26b15dad | 2233 | struct km_event c; |
df71837d | 2234 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2235 | |
2236 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2237 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2238 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2239 | return -EINVAL; | |
2240 | ||
2241 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2242 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2243 | return -EINVAL; | |
2244 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2245 | return -EINVAL; | |
2246 | ||
07fb0f17 | 2247 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2248 | if (xp == NULL) |
2249 | return -ENOBUFS; | |
2250 | ||
2251 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2252 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2253 | xp->priority = pol->sadb_x_policy_priority; | |
2254 | ||
d0d79c3f | 2255 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 | 2256 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
1da177e4 LT |
2257 | xp->selector.family = xp->family; |
2258 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2259 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2260 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2261 | if (xp->selector.sport) | |
8f83f23e | 2262 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2263 | |
d0d79c3f | 2264 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2265 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2266 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2267 | ||
2268 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2269 | * in both addresses. | |
2270 | */ | |
2271 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2272 | ||
2273 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2274 | if (xp->selector.dport) | |
8f83f23e | 2275 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2276 | |
ea110733 | 2277 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2278 | if (sec_ctx != NULL) { |
87536a81 | 2279 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2280 | |
2281 | if (!uctx) { | |
2282 | err = -ENOBUFS; | |
2283 | goto out; | |
2284 | } | |
2285 | ||
52a4c640 | 2286 | err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL); |
df71837d TJ |
2287 | kfree(uctx); |
2288 | ||
2289 | if (err) | |
2290 | goto out; | |
2291 | } | |
2292 | ||
1da177e4 LT |
2293 | xp->lft.soft_byte_limit = XFRM_INF; |
2294 | xp->lft.hard_byte_limit = XFRM_INF; | |
2295 | xp->lft.soft_packet_limit = XFRM_INF; | |
2296 | xp->lft.hard_packet_limit = XFRM_INF; | |
2297 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2298 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2299 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2300 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2301 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2302 | } | |
2303 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2304 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2305 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2306 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2307 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2308 | } | |
2309 | xp->xfrm_nr = 0; | |
2310 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2311 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2312 | goto out; | |
2313 | ||
1da177e4 LT |
2314 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2315 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2316 | |
2e71029e | 2317 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 2318 | |
df71837d TJ |
2319 | if (err) |
2320 | goto out; | |
1da177e4 | 2321 | |
26b15dad | 2322 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2323 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2324 | else |
f60f6b8f | 2325 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2326 | |
26b15dad | 2327 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2328 | c.portid = hdr->sadb_msg_pid; |
1da177e4 | 2329 | |
26b15dad JHS |
2330 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2331 | xfrm_pol_put(xp); | |
1da177e4 LT |
2332 | return 0; |
2333 | ||
2334 | out: | |
12a169e7 | 2335 | xp->walk.dead = 1; |
64c31b3f | 2336 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2337 | return err; |
2338 | } | |
2339 | ||
4c93fbb0 | 2340 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2341 | { |
07fb0f17 | 2342 | struct net *net = sock_net(sk); |
1da177e4 LT |
2343 | int err; |
2344 | struct sadb_address *sa; | |
2345 | struct sadb_x_policy *pol; | |
03e1ad7b | 2346 | struct xfrm_policy *xp; |
1da177e4 | 2347 | struct xfrm_selector sel; |
26b15dad | 2348 | struct km_event c; |
df71837d | 2349 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2350 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2351 | |
2352 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2353 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2354 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2355 | return -EINVAL; | |
2356 | ||
2357 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2358 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2359 | return -EINVAL; | |
2360 | ||
2361 | memset(&sel, 0, sizeof(sel)); | |
2362 | ||
d0d79c3f | 2363 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 LT |
2364 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2365 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2366 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2367 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2368 | if (sel.sport) | |
8f83f23e | 2369 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2370 | |
d0d79c3f | 2371 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2372 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2373 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2374 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2375 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2376 | if (sel.dport) | |
8f83f23e | 2377 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2378 | |
ea110733 | 2379 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2380 | if (sec_ctx != NULL) { |
87536a81 | 2381 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2382 | |
2383 | if (!uctx) | |
2384 | return -ENOMEM; | |
2385 | ||
52a4c640 | 2386 | err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL); |
df71837d | 2387 | kfree(uctx); |
df71837d TJ |
2388 | if (err) |
2389 | return err; | |
2db3e47e | 2390 | } |
161a09e7 | 2391 | |
8ca2e93b | 2392 | xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b PM |
2393 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2394 | 1, &err); | |
2395 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2396 | if (xp == NULL) |
2397 | return -ENOENT; | |
2398 | ||
2e71029e | 2399 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
2400 | |
2401 | if (err) | |
c8c05a8e | 2402 | goto out; |
13fcfbb0 | 2403 | |
26b15dad | 2404 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2405 | c.portid = hdr->sadb_msg_pid; |
1839faab | 2406 | c.data.byid = 0; |
f60f6b8f | 2407 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2408 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2409 | ||
c8c05a8e | 2410 | out: |
26b15dad JHS |
2411 | xfrm_pol_put(xp); |
2412 | return err; | |
2413 | } | |
2414 | ||
4c93fbb0 | 2415 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir) |
26b15dad JHS |
2416 | { |
2417 | int err; | |
2418 | struct sk_buff *out_skb; | |
2419 | struct sadb_msg *out_hdr; | |
2420 | err = 0; | |
2421 | ||
1da177e4 LT |
2422 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2423 | if (IS_ERR(out_skb)) { | |
2424 | err = PTR_ERR(out_skb); | |
2425 | goto out; | |
2426 | } | |
55569ce2 KM |
2427 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2428 | if (err < 0) | |
2429 | goto out; | |
1da177e4 LT |
2430 | |
2431 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2432 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2433 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2434 | out_hdr->sadb_msg_satype = 0; |
2435 | out_hdr->sadb_msg_errno = 0; | |
2436 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2437 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 2438 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4 LT |
2439 | err = 0; |
2440 | ||
2441 | out: | |
1da177e4 LT |
2442 | return err; |
2443 | } | |
2444 | ||
08de61be SS |
2445 | static int pfkey_sockaddr_pair_size(sa_family_t family) |
2446 | { | |
9e8b4ed8 | 2447 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2448 | } |
2449 | ||
13c1d189 | 2450 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2451 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2452 | u16 *family) | |
2453 | { | |
5f95ac91 YH |
2454 | int af, socklen; |
2455 | ||
096f41d3 | 2456 | if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2457 | return -EINVAL; |
2458 | ||
13c1d189 | 2459 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2460 | if (!af) |
2461 | return -EINVAL; | |
2462 | ||
2463 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2464 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2465 | daddr) != af) |
08de61be | 2466 | return -EINVAL; |
08de61be | 2467 | |
5f95ac91 | 2468 | *family = af; |
08de61be SS |
2469 | return 0; |
2470 | } | |
2471 | ||
096f41d3 | 2472 | #ifdef CONFIG_NET_KEY_MIGRATE |
08de61be SS |
2473 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, |
2474 | struct xfrm_migrate *m) | |
2475 | { | |
2476 | int err; | |
2477 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2478 | int mode; |
08de61be | 2479 | |
096f41d3 HX |
2480 | if (len < sizeof(*rq1) || |
2481 | len < rq1->sadb_x_ipsecrequest_len || | |
2482 | rq1->sadb_x_ipsecrequest_len < sizeof(*rq1)) | |
08de61be SS |
2483 | return -EINVAL; |
2484 | ||
2485 | /* old endoints */ | |
13c1d189 | 2486 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
096f41d3 | 2487 | rq1->sadb_x_ipsecrequest_len - sizeof(*rq1), |
13c1d189 | 2488 | &m->old_saddr, &m->old_daddr, |
08de61be SS |
2489 | &m->old_family); |
2490 | if (err) | |
2491 | return err; | |
2492 | ||
2493 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2494 | len -= rq1->sadb_x_ipsecrequest_len; | |
2495 | ||
096f41d3 HX |
2496 | if (len <= sizeof(*rq2) || |
2497 | len < rq2->sadb_x_ipsecrequest_len || | |
2498 | rq2->sadb_x_ipsecrequest_len < sizeof(*rq2)) | |
08de61be SS |
2499 | return -EINVAL; |
2500 | ||
2501 | /* new endpoints */ | |
13c1d189 | 2502 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
096f41d3 | 2503 | rq2->sadb_x_ipsecrequest_len - sizeof(*rq2), |
13c1d189 | 2504 | &m->new_saddr, &m->new_daddr, |
08de61be SS |
2505 | &m->new_family); |
2506 | if (err) | |
2507 | return err; | |
2508 | ||
2509 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2510 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2511 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2512 | return -EINVAL; | |
2513 | ||
2514 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2515 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2516 | return -EINVAL; | |
2517 | m->mode = mode; | |
08de61be SS |
2518 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2519 | ||
2520 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2521 | rq2->sadb_x_ipsecrequest_len)); | |
2522 | } | |
2523 | ||
2524 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2525 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2526 | { |
2527 | int i, len, ret, err = -EINVAL; | |
2528 | u8 dir; | |
2529 | struct sadb_address *sa; | |
13c1d189 | 2530 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2531 | struct sadb_x_policy *pol; |
2532 | struct sadb_x_ipsecrequest *rq; | |
2533 | struct xfrm_selector sel; | |
2534 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2535 | struct xfrm_kmaddress k; |
8d549c4f | 2536 | struct net *net = sock_net(sk); |
08de61be SS |
2537 | |
2538 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2539 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2540 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2541 | err = -EINVAL; | |
2542 | goto out; | |
2543 | } | |
2544 | ||
13c1d189 | 2545 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2546 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2547 | |
2548 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2549 | err = -EINVAL; | |
2550 | goto out; | |
2551 | } | |
2552 | ||
13c1d189 AE |
2553 | if (kma) { |
2554 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2555 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2556 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2557 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2558 | &k.local, &k.remote, &k.family); | |
2559 | if (ret < 0) { | |
2560 | err = ret; | |
2561 | goto out; | |
2562 | } | |
2563 | } | |
2564 | ||
08de61be SS |
2565 | dir = pol->sadb_x_policy_dir - 1; |
2566 | memset(&sel, 0, sizeof(sel)); | |
2567 | ||
2568 | /* set source address info of selector */ | |
2569 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2570 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2571 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2572 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2573 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2574 | if (sel.sport) | |
582ee43d | 2575 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2576 | |
2577 | /* set destination address info of selector */ | |
47162c0b | 2578 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
08de61be SS |
2579 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2580 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2581 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2582 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2583 | if (sel.dport) | |
582ee43d | 2584 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2585 | |
2586 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2587 | ||
2588 | /* extract ipsecrequests */ | |
2589 | i = 0; | |
2590 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2591 | ||
2592 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2593 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2594 | if (ret < 0) { | |
2595 | err = ret; | |
2596 | goto out; | |
2597 | } else { | |
2598 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2599 | len -= ret; | |
2600 | i++; | |
2601 | } | |
2602 | } | |
2603 | ||
2604 | if (!i || len > 0) { | |
2605 | err = -EINVAL; | |
2606 | goto out; | |
2607 | } | |
2608 | ||
13c1d189 | 2609 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
4ab47d47 | 2610 | kma ? &k : NULL, net, NULL); |
08de61be SS |
2611 | |
2612 | out: | |
2613 | return err; | |
2614 | } | |
2615 | #else | |
2616 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
7f6daa63 | 2617 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2618 | { |
2619 | return -ENOPROTOOPT; | |
2620 | } | |
2621 | #endif | |
2622 | ||
2623 | ||
4c93fbb0 | 2624 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2625 | { |
07fb0f17 | 2626 | struct net *net = sock_net(sk); |
77d8d7a6 | 2627 | unsigned int dir; |
215a2dd3 | 2628 | int err = 0, delete; |
1da177e4 LT |
2629 | struct sadb_x_policy *pol; |
2630 | struct xfrm_policy *xp; | |
26b15dad | 2631 | struct km_event c; |
1da177e4 LT |
2632 | |
2633 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2634 | return -EINVAL; | |
2635 | ||
77d8d7a6 HX |
2636 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2637 | if (dir >= XFRM_POLICY_MAX) | |
2638 | return -EINVAL; | |
2639 | ||
215a2dd3 | 2640 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
8ca2e93b | 2641 | xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
bd55775c | 2642 | dir, pol->sadb_x_policy_id, delete, &err); |
1da177e4 LT |
2643 | if (xp == NULL) |
2644 | return -ENOENT; | |
2645 | ||
215a2dd3 | 2646 | if (delete) { |
2e71029e | 2647 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
1da177e4 | 2648 | |
215a2dd3 EP |
2649 | if (err) |
2650 | goto out; | |
2651 | c.seq = hdr->sadb_msg_seq; | |
15e47304 | 2652 | c.portid = hdr->sadb_msg_pid; |
bf08867f | 2653 | c.data.byid = 1; |
f60f6b8f | 2654 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2655 | km_policy_notify(xp, dir, &c); |
26b15dad | 2656 | } else { |
77d8d7a6 | 2657 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2658 | } |
1da177e4 | 2659 | |
215a2dd3 | 2660 | out: |
1da177e4 LT |
2661 | xfrm_pol_put(xp); |
2662 | return err; | |
2663 | } | |
2664 | ||
2665 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2666 | { | |
83321d6b | 2667 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2668 | struct sk_buff *out_skb; |
2669 | struct sadb_msg *out_hdr; | |
55569ce2 | 2670 | int err; |
1da177e4 | 2671 | |
83321d6b TT |
2672 | if (!pfkey_can_dump(&pfk->sk)) |
2673 | return -ENOBUFS; | |
2674 | ||
1da177e4 LT |
2675 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2676 | if (IS_ERR(out_skb)) | |
2677 | return PTR_ERR(out_skb); | |
2678 | ||
55569ce2 KM |
2679 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2680 | if (err < 0) | |
2681 | return err; | |
1da177e4 LT |
2682 | |
2683 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2684 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2685 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2686 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2687 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2688 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 2689 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
2690 | |
2691 | if (pfk->dump.skb) | |
36f41f8f | 2692 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 2693 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
2694 | pfk->dump.skb = out_skb; |
2695 | ||
1da177e4 LT |
2696 | return 0; |
2697 | } | |
2698 | ||
83321d6b TT |
2699 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2700 | { | |
07fb0f17 AD |
2701 | struct net *net = sock_net(&pfk->sk); |
2702 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); | |
83321d6b TT |
2703 | } |
2704 | ||
2705 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2706 | { | |
283bc9f3 FD |
2707 | struct net *net = sock_net((struct sock *)pfk); |
2708 | ||
2709 | xfrm_policy_walk_done(&pfk->dump.u.policy, net); | |
83321d6b TT |
2710 | } |
2711 | ||
4c93fbb0 | 2712 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2713 | { |
83321d6b | 2714 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2715 | |
89e357d8 YS |
2716 | mutex_lock(&pfk->dump_lock); |
2717 | if (pfk->dump.dump != NULL) { | |
2718 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 2719 | return -EBUSY; |
89e357d8 | 2720 | } |
1da177e4 | 2721 | |
83321d6b | 2722 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 2723 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
2724 | pfk->dump.dump = pfkey_dump_sp; |
2725 | pfk->dump.done = pfkey_dump_sp_done; | |
2726 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
89e357d8 | 2727 | mutex_unlock(&pfk->dump_lock); |
83321d6b TT |
2728 | |
2729 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2730 | } |
2731 | ||
214e005b | 2732 | static int key_notify_policy_flush(const struct km_event *c) |
1da177e4 LT |
2733 | { |
2734 | struct sk_buff *skb_out; | |
26b15dad | 2735 | struct sadb_msg *hdr; |
1da177e4 | 2736 | |
26b15dad | 2737 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2738 | if (!skb_out) |
2739 | return -ENOBUFS; | |
4df864c1 | 2740 | hdr = skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2741 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad | 2742 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 2743 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
2744 | hdr->sadb_msg_version = PF_KEY_V2; |
2745 | hdr->sadb_msg_errno = (uint8_t) 0; | |
85dfb745 | 2746 | hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; |
26b15dad | 2747 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
a5cc68f3 | 2748 | hdr->sadb_msg_reserved = 0; |
36f41f8f | 2749 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad | 2750 | return 0; |
1da177e4 | 2751 | |
26b15dad JHS |
2752 | } |
2753 | ||
4c93fbb0 | 2754 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
26b15dad | 2755 | { |
07fb0f17 | 2756 | struct net *net = sock_net(sk); |
26b15dad | 2757 | struct km_event c; |
8be987d7 | 2758 | int err, err2; |
1da177e4 | 2759 | |
2e71029e | 2760 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true); |
8be987d7 | 2761 | err2 = unicast_flush_resp(sk, hdr); |
2f1eb65f JHS |
2762 | if (err || err2) { |
2763 | if (err == -ESRCH) /* empty table - old silent behavior */ | |
2764 | return 0; | |
2765 | return err; | |
2766 | } | |
8be987d7 | 2767 | |
f7b6983f | 2768 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2769 | c.event = XFRM_MSG_FLUSHPOLICY; |
15e47304 | 2770 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 2771 | c.seq = hdr->sadb_msg_seq; |
07fb0f17 | 2772 | c.net = net; |
26b15dad | 2773 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
2774 | |
2775 | return 0; | |
2776 | } | |
2777 | ||
2778 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2779 | const struct sadb_msg *hdr, void * const *ext_hdrs); |
8603b955 | 2780 | static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
1da177e4 LT |
2781 | [SADB_RESERVED] = pfkey_reserved, |
2782 | [SADB_GETSPI] = pfkey_getspi, | |
2783 | [SADB_UPDATE] = pfkey_add, | |
2784 | [SADB_ADD] = pfkey_add, | |
2785 | [SADB_DELETE] = pfkey_delete, | |
2786 | [SADB_GET] = pfkey_get, | |
2787 | [SADB_ACQUIRE] = pfkey_acquire, | |
2788 | [SADB_REGISTER] = pfkey_register, | |
2789 | [SADB_EXPIRE] = NULL, | |
2790 | [SADB_FLUSH] = pfkey_flush, | |
2791 | [SADB_DUMP] = pfkey_dump, | |
2792 | [SADB_X_PROMISC] = pfkey_promisc, | |
2793 | [SADB_X_PCHANGE] = NULL, | |
2794 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2795 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2796 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2797 | [SADB_X_SPDGET] = pfkey_spdget, | |
2798 | [SADB_X_SPDACQUIRE] = NULL, | |
2799 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2800 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2801 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2802 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2803 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2804 | }; |
2805 | ||
4c93fbb0 | 2806 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr) |
1da177e4 LT |
2807 | { |
2808 | void *ext_hdrs[SADB_EXT_MAX]; | |
2809 | int err; | |
2810 | ||
36f41f8f | 2811 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, |
07fb0f17 | 2812 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
1da177e4 LT |
2813 | |
2814 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2815 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2816 | if (!err) { | |
2817 | err = -EOPNOTSUPP; | |
2818 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2819 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2820 | } | |
2821 | return err; | |
2822 | } | |
2823 | ||
2824 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2825 | { | |
2826 | struct sadb_msg *hdr = NULL; | |
2827 | ||
2828 | if (skb->len < sizeof(*hdr)) { | |
2829 | *errp = -EMSGSIZE; | |
2830 | } else { | |
2831 | hdr = (struct sadb_msg *) skb->data; | |
2832 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2833 | hdr->sadb_msg_reserved != 0 || | |
2834 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2835 | hdr->sadb_msg_type > SADB_MAX)) { | |
2836 | hdr = NULL; | |
2837 | *errp = -EINVAL; | |
2838 | } else if (hdr->sadb_msg_len != (skb->len / | |
2839 | sizeof(uint64_t)) || | |
2840 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2841 | sizeof(uint64_t))) { | |
2842 | hdr = NULL; | |
2843 | *errp = -EMSGSIZE; | |
2844 | } else { | |
2845 | *errp = 0; | |
2846 | } | |
2847 | } | |
2848 | return hdr; | |
2849 | } | |
2850 | ||
4c93fbb0 DM |
2851 | static inline int aalg_tmpl_set(const struct xfrm_tmpl *t, |
2852 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2853 | { |
f398035f HX |
2854 | unsigned int id = d->desc.sadb_alg_id; |
2855 | ||
2856 | if (id >= sizeof(t->aalgos) * 8) | |
2857 | return 0; | |
2858 | ||
2859 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2860 | } |
2861 | ||
4c93fbb0 DM |
2862 | static inline int ealg_tmpl_set(const struct xfrm_tmpl *t, |
2863 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2864 | { |
f398035f HX |
2865 | unsigned int id = d->desc.sadb_alg_id; |
2866 | ||
2867 | if (id >= sizeof(t->ealgos) * 8) | |
2868 | return 0; | |
2869 | ||
2870 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2871 | } |
2872 | ||
4c93fbb0 | 2873 | static int count_ah_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2874 | { |
2875 | int i, sz = 0; | |
2876 | ||
2877 | for (i = 0; ; i++) { | |
4c93fbb0 | 2878 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2879 | if (!aalg) |
2880 | break; | |
7e50f84c JK |
2881 | if (!aalg->pfkey_supported) |
2882 | continue; | |
1da177e4 LT |
2883 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2884 | sz += sizeof(struct sadb_comb); | |
2885 | } | |
2886 | return sz + sizeof(struct sadb_prop); | |
2887 | } | |
2888 | ||
4c93fbb0 | 2889 | static int count_esp_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2890 | { |
2891 | int i, k, sz = 0; | |
2892 | ||
2893 | for (i = 0; ; i++) { | |
4c93fbb0 | 2894 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2895 | if (!ealg) |
2896 | break; | |
8ff24541 | 2897 | |
7e50f84c JK |
2898 | if (!ealg->pfkey_supported) |
2899 | continue; | |
2900 | ||
1da177e4 LT |
2901 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2902 | continue; | |
8ff24541 | 2903 | |
1da177e4 | 2904 | for (k = 1; ; k++) { |
4c93fbb0 | 2905 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2906 | if (!aalg) |
2907 | break; | |
8ff24541 | 2908 | |
7e50f84c JK |
2909 | if (!aalg->pfkey_supported) |
2910 | continue; | |
2911 | ||
1da177e4 LT |
2912 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2913 | sz += sizeof(struct sadb_comb); | |
2914 | } | |
2915 | } | |
2916 | return sz + sizeof(struct sadb_prop); | |
2917 | } | |
2918 | ||
4c93fbb0 | 2919 | static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2920 | { |
2921 | struct sadb_prop *p; | |
2922 | int i; | |
2923 | ||
4df864c1 | 2924 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2925 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2926 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2927 | p->sadb_prop_replay = 32; | |
2928 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2929 | ||
2930 | for (i = 0; ; i++) { | |
4c93fbb0 | 2931 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2932 | if (!aalg) |
2933 | break; | |
2934 | ||
7e50f84c JK |
2935 | if (!aalg->pfkey_supported) |
2936 | continue; | |
2937 | ||
1da177e4 LT |
2938 | if (aalg_tmpl_set(t, aalg) && aalg->available) { |
2939 | struct sadb_comb *c; | |
b080db58 | 2940 | c = skb_put_zero(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
2941 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; |
2942 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2943 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2944 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2945 | c->sadb_comb_hard_addtime = 24*60*60; | |
2946 | c->sadb_comb_soft_addtime = 20*60*60; | |
2947 | c->sadb_comb_hard_usetime = 8*60*60; | |
2948 | c->sadb_comb_soft_usetime = 7*60*60; | |
2949 | } | |
2950 | } | |
2951 | } | |
2952 | ||
4c93fbb0 | 2953 | static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2954 | { |
2955 | struct sadb_prop *p; | |
2956 | int i, k; | |
2957 | ||
4df864c1 | 2958 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2959 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2960 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2961 | p->sadb_prop_replay = 32; | |
2962 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2963 | ||
2964 | for (i=0; ; i++) { | |
4c93fbb0 | 2965 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2966 | if (!ealg) |
2967 | break; | |
8ff24541 | 2968 | |
7e50f84c JK |
2969 | if (!ealg->pfkey_supported) |
2970 | continue; | |
2971 | ||
1da177e4 LT |
2972 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2973 | continue; | |
8ff24541 | 2974 | |
1da177e4 LT |
2975 | for (k = 1; ; k++) { |
2976 | struct sadb_comb *c; | |
4c93fbb0 | 2977 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2978 | if (!aalg) |
2979 | break; | |
7e50f84c JK |
2980 | if (!aalg->pfkey_supported) |
2981 | continue; | |
1da177e4 LT |
2982 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) |
2983 | continue; | |
4df864c1 | 2984 | c = skb_put(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
2985 | memset(c, 0, sizeof(*c)); |
2986 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2987 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2988 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2989 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2990 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2991 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2992 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2993 | c->sadb_comb_hard_addtime = 24*60*60; | |
2994 | c->sadb_comb_soft_addtime = 20*60*60; | |
2995 | c->sadb_comb_hard_usetime = 8*60*60; | |
2996 | c->sadb_comb_soft_usetime = 7*60*60; | |
2997 | } | |
2998 | } | |
2999 | } | |
3000 | ||
214e005b | 3001 | static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c) |
26b15dad JHS |
3002 | { |
3003 | return 0; | |
3004 | } | |
3005 | ||
214e005b | 3006 | static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
3007 | { |
3008 | struct sk_buff *out_skb; | |
3009 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
3010 | int hard; |
3011 | int hsc; | |
3012 | ||
bf08867f | 3013 | hard = c->data.hard; |
26b15dad JHS |
3014 | if (hard) |
3015 | hsc = 2; | |
3016 | else | |
3017 | hsc = 1; | |
1da177e4 | 3018 | |
050f009e | 3019 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
3020 | if (IS_ERR(out_skb)) |
3021 | return PTR_ERR(out_skb); | |
3022 | ||
3023 | out_hdr = (struct sadb_msg *) out_skb->data; | |
3024 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
3025 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
3026 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3027 | out_hdr->sadb_msg_errno = 0; | |
3028 | out_hdr->sadb_msg_reserved = 0; | |
3029 | out_hdr->sadb_msg_seq = 0; | |
3030 | out_hdr->sadb_msg_pid = 0; | |
3031 | ||
36f41f8f ED |
3032 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3033 | xs_net(x)); | |
1da177e4 LT |
3034 | return 0; |
3035 | } | |
3036 | ||
214e005b | 3037 | static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 3038 | { |
07fb0f17 | 3039 | struct net *net = x ? xs_net(x) : c->net; |
3fa87a32 AD |
3040 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3041 | ||
3042 | if (atomic_read(&net_pfkey->socks_nr) == 0) | |
99c6f60e JHS |
3043 | return 0; |
3044 | ||
26b15dad | 3045 | switch (c->event) { |
f60f6b8f | 3046 | case XFRM_MSG_EXPIRE: |
26b15dad | 3047 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
3048 | case XFRM_MSG_DELSA: |
3049 | case XFRM_MSG_NEWSA: | |
3050 | case XFRM_MSG_UPDSA: | |
26b15dad | 3051 | return key_notify_sa(x, c); |
f60f6b8f | 3052 | case XFRM_MSG_FLUSHSA: |
26b15dad | 3053 | return key_notify_sa_flush(c); |
d51d081d JHS |
3054 | case XFRM_MSG_NEWAE: /* not yet supported */ |
3055 | break; | |
26b15dad | 3056 | default: |
207024b9 | 3057 | pr_err("pfkey: Unknown SA event %d\n", c->event); |
26b15dad JHS |
3058 | break; |
3059 | } | |
3060 | ||
3061 | return 0; | |
3062 | } | |
3063 | ||
214e005b | 3064 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 3065 | { |
f7b6983f MN |
3066 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
3067 | return 0; | |
3068 | ||
26b15dad | 3069 | switch (c->event) { |
f60f6b8f | 3070 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 3071 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
3072 | case XFRM_MSG_DELPOLICY: |
3073 | case XFRM_MSG_NEWPOLICY: | |
3074 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 3075 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 3076 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
3077 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
3078 | break; | |
26b15dad JHS |
3079 | return key_notify_policy_flush(c); |
3080 | default: | |
207024b9 | 3081 | pr_err("pfkey: Unknown policy event %d\n", c->event); |
26b15dad JHS |
3082 | break; |
3083 | } | |
3084 | ||
3085 | return 0; | |
3086 | } | |
3087 | ||
1da177e4 LT |
3088 | static u32 get_acqseq(void) |
3089 | { | |
3090 | u32 res; | |
28aecb9d | 3091 | static atomic_t acqseq; |
1da177e4 | 3092 | |
28aecb9d ED |
3093 | do { |
3094 | res = atomic_inc_return(&acqseq); | |
3095 | } while (!res); | |
1da177e4 LT |
3096 | return res; |
3097 | } | |
3098 | ||
0f24558e HG |
3099 | static bool pfkey_is_alive(const struct km_event *c) |
3100 | { | |
3101 | struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id); | |
3102 | struct sock *sk; | |
3103 | bool is_alive = false; | |
3104 | ||
3105 | rcu_read_lock(); | |
3106 | sk_for_each_rcu(sk, &net_pfkey->table) { | |
3107 | if (pfkey_sk(sk)->registered) { | |
3108 | is_alive = true; | |
3109 | break; | |
3110 | } | |
3111 | } | |
3112 | rcu_read_unlock(); | |
3113 | ||
3114 | return is_alive; | |
3115 | } | |
3116 | ||
65e0736b | 3117 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp) |
1da177e4 LT |
3118 | { |
3119 | struct sk_buff *skb; | |
3120 | struct sadb_msg *hdr; | |
3121 | struct sadb_address *addr; | |
3122 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3123 | int sockaddr_size; |
3124 | int size; | |
4e2ba18e VY |
3125 | struct sadb_x_sec_ctx *sec_ctx; |
3126 | struct xfrm_sec_ctx *xfrm_ctx; | |
3127 | int ctx_size = 0; | |
8ff24541 | 3128 | |
1da177e4 LT |
3129 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3130 | if (!sockaddr_size) | |
3131 | return -EINVAL; | |
3132 | ||
3133 | size = sizeof(struct sadb_msg) + | |
3134 | (sizeof(struct sadb_address) * 2) + | |
3135 | (sockaddr_size * 2) + | |
3136 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3137 | |
1da177e4 LT |
3138 | if (x->id.proto == IPPROTO_AH) |
3139 | size += count_ah_combs(t); | |
3140 | else if (x->id.proto == IPPROTO_ESP) | |
3141 | size += count_esp_combs(t); | |
3142 | ||
4e2ba18e VY |
3143 | if ((xfrm_ctx = x->security)) { |
3144 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3145 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3146 | } | |
3147 | ||
1da177e4 LT |
3148 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3149 | if (skb == NULL) | |
3150 | return -ENOMEM; | |
8ff24541 | 3151 | |
4df864c1 | 3152 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3153 | hdr->sadb_msg_version = PF_KEY_V2; |
3154 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3155 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3156 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3157 | hdr->sadb_msg_errno = 0; | |
3158 | hdr->sadb_msg_reserved = 0; | |
3159 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3160 | hdr->sadb_msg_pid = 0; | |
3161 | ||
3162 | /* src address */ | |
4df864c1 | 3163 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3164 | addr->sadb_address_len = |
1da177e4 LT |
3165 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3166 | sizeof(uint64_t); | |
3167 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3168 | addr->sadb_address_proto = 0; | |
3169 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3170 | addr->sadb_address_prefixlen = |
3171 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3172 | (struct sockaddr *) (addr + 1), | |
3173 | x->props.family); | |
3174 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3175 | BUG(); |
8ff24541 | 3176 | |
1da177e4 | 3177 | /* dst address */ |
4df864c1 | 3178 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
3179 | addr->sadb_address_len = |
3180 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3181 | sizeof(uint64_t); | |
3182 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3183 | addr->sadb_address_proto = 0; | |
3184 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3185 | addr->sadb_address_prefixlen = |
3186 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3187 | (struct sockaddr *) (addr + 1), | |
3188 | x->props.family); | |
3189 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3190 | BUG(); |
3191 | ||
4df864c1 | 3192 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
3193 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
3194 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3195 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
65e0736b | 3196 | pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1; |
ff862a46 | 3197 | pol->sadb_x_policy_reserved = 0; |
1da177e4 | 3198 | pol->sadb_x_policy_id = xp->index; |
ff862a46 | 3199 | pol->sadb_x_policy_priority = xp->priority; |
1da177e4 LT |
3200 | |
3201 | /* Set sadb_comb's. */ | |
3202 | if (x->id.proto == IPPROTO_AH) | |
3203 | dump_ah_combs(skb, t); | |
3204 | else if (x->id.proto == IPPROTO_ESP) | |
3205 | dump_esp_combs(skb, t); | |
3206 | ||
4e2ba18e VY |
3207 | /* security context */ |
3208 | if (xfrm_ctx) { | |
4df864c1 JB |
3209 | sec_ctx = skb_put(skb, |
3210 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
4e2ba18e VY |
3211 | sec_ctx->sadb_x_sec_len = |
3212 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3213 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3214 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3215 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3216 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3217 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3218 | xfrm_ctx->ctx_len); | |
3219 | } | |
3220 | ||
36f41f8f ED |
3221 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3222 | xs_net(x)); | |
1da177e4 LT |
3223 | } |
3224 | ||
cb969f07 | 3225 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3226 | u8 *data, int len, int *dir) |
1da177e4 | 3227 | { |
07fb0f17 | 3228 | struct net *net = sock_net(sk); |
1da177e4 LT |
3229 | struct xfrm_policy *xp; |
3230 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3231 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3232 | |
cb969f07 | 3233 | switch (sk->sk_family) { |
1da177e4 LT |
3234 | case AF_INET: |
3235 | if (opt != IP_IPSEC_POLICY) { | |
3236 | *dir = -EOPNOTSUPP; | |
3237 | return NULL; | |
3238 | } | |
3239 | break; | |
dfd56b8b | 3240 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
3241 | case AF_INET6: |
3242 | if (opt != IPV6_IPSEC_POLICY) { | |
3243 | *dir = -EOPNOTSUPP; | |
3244 | return NULL; | |
3245 | } | |
3246 | break; | |
3247 | #endif | |
3248 | default: | |
3249 | *dir = -EINVAL; | |
3250 | return NULL; | |
3251 | } | |
3252 | ||
3253 | *dir = -EINVAL; | |
3254 | ||
3255 | if (len < sizeof(struct sadb_x_policy) || | |
3256 | pol->sadb_x_policy_len*8 > len || | |
3257 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3258 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3259 | return NULL; | |
3260 | ||
07fb0f17 | 3261 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
3262 | if (xp == NULL) { |
3263 | *dir = -ENOBUFS; | |
3264 | return NULL; | |
3265 | } | |
3266 | ||
3267 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3268 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3269 | ||
3270 | xp->lft.soft_byte_limit = XFRM_INF; | |
3271 | xp->lft.hard_byte_limit = XFRM_INF; | |
3272 | xp->lft.soft_packet_limit = XFRM_INF; | |
3273 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3274 | xp->family = sk->sk_family; |
1da177e4 LT |
3275 | |
3276 | xp->xfrm_nr = 0; | |
3277 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3278 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3279 | goto out; | |
3280 | ||
df71837d TJ |
3281 | /* security context too */ |
3282 | if (len >= (pol->sadb_x_policy_len*8 + | |
3283 | sizeof(struct sadb_x_sec_ctx))) { | |
3284 | char *p = (char *)pol; | |
3285 | struct xfrm_user_sec_ctx *uctx; | |
3286 | ||
3287 | p += pol->sadb_x_policy_len*8; | |
3288 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3289 | if (len < pol->sadb_x_policy_len*8 + | |
d90c9024 | 3290 | sec_ctx->sadb_x_sec_len*8) { |
cb969f07 | 3291 | *dir = -EINVAL; |
df71837d | 3292 | goto out; |
cb969f07 | 3293 | } |
df71837d TJ |
3294 | if ((*dir = verify_sec_ctx_len(p))) |
3295 | goto out; | |
87536a81 | 3296 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC); |
52a4c640 | 3297 | *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC); |
df71837d TJ |
3298 | kfree(uctx); |
3299 | ||
3300 | if (*dir) | |
3301 | goto out; | |
3302 | } | |
3303 | ||
1da177e4 LT |
3304 | *dir = pol->sadb_x_policy_dir-1; |
3305 | return xp; | |
3306 | ||
3307 | out: | |
70e90679 | 3308 | xp->walk.dead = 1; |
64c31b3f | 3309 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3310 | return NULL; |
3311 | } | |
3312 | ||
5d36b180 | 3313 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3314 | { |
3315 | struct sk_buff *skb; | |
3316 | struct sadb_msg *hdr; | |
3317 | struct sadb_sa *sa; | |
3318 | struct sadb_address *addr; | |
3319 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3320 | int sockaddr_size; |
3321 | int size; | |
3322 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3323 | struct xfrm_encap_tmpl *natt = NULL; | |
3324 | ||
3325 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3326 | if (!sockaddr_size) | |
3327 | return -EINVAL; | |
3328 | ||
3329 | if (!satype) | |
3330 | return -EINVAL; | |
3331 | ||
3332 | if (!x->encap) | |
3333 | return -EINVAL; | |
3334 | ||
3335 | natt = x->encap; | |
3336 | ||
3337 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3338 | * | |
3339 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3340 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3341 | */ | |
8ff24541 | 3342 | |
1da177e4 LT |
3343 | size = sizeof(struct sadb_msg) + |
3344 | sizeof(struct sadb_sa) + | |
3345 | (sizeof(struct sadb_address) * 2) + | |
3346 | (sockaddr_size * 2) + | |
3347 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3348 | |
1da177e4 LT |
3349 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3350 | if (skb == NULL) | |
3351 | return -ENOMEM; | |
8ff24541 | 3352 | |
4df864c1 | 3353 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3354 | hdr->sadb_msg_version = PF_KEY_V2; |
3355 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3356 | hdr->sadb_msg_satype = satype; | |
3357 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3358 | hdr->sadb_msg_errno = 0; | |
3359 | hdr->sadb_msg_reserved = 0; | |
3360 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3361 | hdr->sadb_msg_pid = 0; | |
3362 | ||
3363 | /* SA */ | |
4df864c1 | 3364 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
3365 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
3366 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3367 | sa->sadb_sa_spi = x->id.spi; | |
3368 | sa->sadb_sa_replay = 0; | |
3369 | sa->sadb_sa_state = 0; | |
3370 | sa->sadb_sa_auth = 0; | |
3371 | sa->sadb_sa_encrypt = 0; | |
3372 | sa->sadb_sa_flags = 0; | |
3373 | ||
3374 | /* ADDRESS_SRC (old addr) */ | |
4df864c1 | 3375 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3376 | addr->sadb_address_len = |
1da177e4 LT |
3377 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3378 | sizeof(uint64_t); | |
3379 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3380 | addr->sadb_address_proto = 0; | |
3381 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3382 | addr->sadb_address_prefixlen = |
3383 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3384 | (struct sockaddr *) (addr + 1), | |
3385 | x->props.family); | |
3386 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3387 | BUG(); |
3388 | ||
3389 | /* NAT_T_SPORT (old port) */ | |
4df864c1 | 3390 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3391 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3392 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3393 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3394 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3395 | ||
3396 | /* ADDRESS_DST (new addr) */ | |
4df864c1 | 3397 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3398 | addr->sadb_address_len = |
1da177e4 LT |
3399 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3400 | sizeof(uint64_t); | |
3401 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3402 | addr->sadb_address_proto = 0; | |
3403 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3404 | addr->sadb_address_prefixlen = |
3405 | pfkey_sockaddr_fill(ipaddr, 0, | |
3406 | (struct sockaddr *) (addr + 1), | |
3407 | x->props.family); | |
3408 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3409 | BUG(); |
3410 | ||
3411 | /* NAT_T_DPORT (new port) */ | |
4df864c1 | 3412 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3413 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3414 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3415 | n_port->sadb_x_nat_t_port_port = sport; | |
3416 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3417 | ||
36f41f8f ED |
3418 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3419 | xs_net(x)); | |
1da177e4 LT |
3420 | } |
3421 | ||
08de61be SS |
3422 | #ifdef CONFIG_NET_KEY_MIGRATE |
3423 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
183cad12 | 3424 | const struct xfrm_selector *sel) |
08de61be SS |
3425 | { |
3426 | struct sadb_address *addr; | |
4df864c1 | 3427 | addr = skb_put(skb, sizeof(struct sadb_address) + sasize); |
08de61be SS |
3428 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; |
3429 | addr->sadb_address_exttype = type; | |
3430 | addr->sadb_address_proto = sel->proto; | |
3431 | addr->sadb_address_reserved = 0; | |
3432 | ||
3433 | switch (type) { | |
3434 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3435 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3436 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3437 | (struct sockaddr *)(addr + 1), | |
3438 | sel->family); | |
08de61be SS |
3439 | break; |
3440 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3441 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3442 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3443 | (struct sockaddr *)(addr + 1), | |
3444 | sel->family); | |
08de61be SS |
3445 | break; |
3446 | default: | |
3447 | return -EINVAL; | |
3448 | } | |
3449 | ||
3450 | return 0; | |
3451 | } | |
3452 | ||
13c1d189 | 3453 | |
183cad12 | 3454 | static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k) |
13c1d189 AE |
3455 | { |
3456 | struct sadb_x_kmaddress *kma; | |
3457 | u8 *sa; | |
3458 | int family = k->family; | |
3459 | int socklen = pfkey_sockaddr_len(family); | |
3460 | int size_req; | |
3461 | ||
3462 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3463 | pfkey_sockaddr_pair_size(family)); | |
3464 | ||
b080db58 | 3465 | kma = skb_put_zero(skb, size_req); |
13c1d189 AE |
3466 | kma->sadb_x_kmaddress_len = size_req / 8; |
3467 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3468 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3469 | ||
3470 | sa = (u8 *)(kma + 1); | |
3471 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3472 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3473 | return -EINVAL; | |
3474 | ||
3475 | return 0; | |
3476 | } | |
3477 | ||
08de61be SS |
3478 | static int set_ipsecrequest(struct sk_buff *skb, |
3479 | uint8_t proto, uint8_t mode, int level, | |
3480 | uint32_t reqid, uint8_t family, | |
183cad12 | 3481 | const xfrm_address_t *src, const xfrm_address_t *dst) |
08de61be SS |
3482 | { |
3483 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3484 | u8 *sa; |
3485 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3486 | int size_req; |
3487 | ||
3488 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3489 | pfkey_sockaddr_pair_size(family); | |
3490 | ||
b080db58 | 3491 | rq = skb_put_zero(skb, size_req); |
08de61be SS |
3492 | rq->sadb_x_ipsecrequest_len = size_req; |
3493 | rq->sadb_x_ipsecrequest_proto = proto; | |
3494 | rq->sadb_x_ipsecrequest_mode = mode; | |
3495 | rq->sadb_x_ipsecrequest_level = level; | |
3496 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3497 | ||
e5b56652 YH |
3498 | sa = (u8 *) (rq + 1); |
3499 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3500 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3501 | return -EINVAL; |
08de61be SS |
3502 | |
3503 | return 0; | |
3504 | } | |
3505 | #endif | |
3506 | ||
3507 | #ifdef CONFIG_NET_KEY_MIGRATE | |
183cad12 DM |
3508 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3509 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3510 | const struct xfrm_kmaddress *k, |
3511 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3512 | { |
3513 | int i; | |
3514 | int sasize_sel; | |
3515 | int size = 0; | |
3516 | int size_pol = 0; | |
3517 | struct sk_buff *skb; | |
3518 | struct sadb_msg *hdr; | |
3519 | struct sadb_x_policy *pol; | |
183cad12 | 3520 | const struct xfrm_migrate *mp; |
08de61be SS |
3521 | |
3522 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3523 | return 0; | |
3524 | ||
3525 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3526 | return -EINVAL; | |
3527 | ||
13c1d189 AE |
3528 | if (k != NULL) { |
3529 | /* addresses for KM */ | |
3530 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3531 | pfkey_sockaddr_pair_size(k->family)); | |
3532 | } | |
3533 | ||
08de61be SS |
3534 | /* selector */ |
3535 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3536 | if (!sasize_sel) | |
3537 | return -EINVAL; | |
3538 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3539 | ||
3540 | /* policy info */ | |
3541 | size_pol += sizeof(struct sadb_x_policy); | |
3542 | ||
3543 | /* ipsecrequests */ | |
3544 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3545 | /* old locator pair */ | |
3546 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3547 | pfkey_sockaddr_pair_size(mp->old_family); | |
3548 | /* new locator pair */ | |
3549 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3550 | pfkey_sockaddr_pair_size(mp->new_family); | |
3551 | } | |
3552 | ||
3553 | size += sizeof(struct sadb_msg) + size_pol; | |
3554 | ||
3555 | /* alloc buffer */ | |
3556 | skb = alloc_skb(size, GFP_ATOMIC); | |
3557 | if (skb == NULL) | |
3558 | return -ENOMEM; | |
3559 | ||
4df864c1 | 3560 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
08de61be SS |
3561 | hdr->sadb_msg_version = PF_KEY_V2; |
3562 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3563 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3564 | hdr->sadb_msg_len = size / 8; | |
3565 | hdr->sadb_msg_errno = 0; | |
3566 | hdr->sadb_msg_reserved = 0; | |
3567 | hdr->sadb_msg_seq = 0; | |
3568 | hdr->sadb_msg_pid = 0; | |
3569 | ||
13c1d189 AE |
3570 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3571 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
89eb06f1 | 3572 | goto err; |
13c1d189 | 3573 | |
08de61be SS |
3574 | /* selector src */ |
3575 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3576 | ||
3577 | /* selector dst */ | |
3578 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3579 | ||
3580 | /* policy information */ | |
4df864c1 | 3581 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
08de61be SS |
3582 | pol->sadb_x_policy_len = size_pol / 8; |
3583 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3584 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3585 | pol->sadb_x_policy_dir = dir + 1; | |
ff862a46 | 3586 | pol->sadb_x_policy_reserved = 0; |
08de61be SS |
3587 | pol->sadb_x_policy_id = 0; |
3588 | pol->sadb_x_policy_priority = 0; | |
3589 | ||
3590 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3591 | /* old ipsecrequest */ | |
55569ce2 KM |
3592 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3593 | if (mode < 0) | |
d4782c32 | 3594 | goto err; |
55569ce2 | 3595 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3596 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3597 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3598 | &mp->old_saddr, &mp->old_daddr) < 0) |
3599 | goto err; | |
08de61be SS |
3600 | |
3601 | /* new ipsecrequest */ | |
55569ce2 | 3602 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3603 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3604 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3605 | &mp->new_saddr, &mp->new_daddr) < 0) |
3606 | goto err; | |
08de61be SS |
3607 | } |
3608 | ||
3609 | /* broadcast migrate message to sockets */ | |
36f41f8f | 3610 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61be SS |
3611 | |
3612 | return 0; | |
d4782c32 PM |
3613 | |
3614 | err: | |
3615 | kfree_skb(skb); | |
3616 | return -EINVAL; | |
08de61be SS |
3617 | } |
3618 | #else | |
183cad12 DM |
3619 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3620 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3621 | const struct xfrm_kmaddress *k, |
3622 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3623 | { |
3624 | return -ENOPROTOOPT; | |
3625 | } | |
3626 | #endif | |
3627 | ||
1b784140 | 3628 | static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
1da177e4 LT |
3629 | { |
3630 | struct sock *sk = sock->sk; | |
3631 | struct sk_buff *skb = NULL; | |
3632 | struct sadb_msg *hdr = NULL; | |
3633 | int err; | |
283bc9f3 | 3634 | struct net *net = sock_net(sk); |
1da177e4 LT |
3635 | |
3636 | err = -EOPNOTSUPP; | |
3637 | if (msg->msg_flags & MSG_OOB) | |
3638 | goto out; | |
3639 | ||
3640 | err = -EMSGSIZE; | |
95c96174 | 3641 | if ((unsigned int)len > sk->sk_sndbuf - 32) |
1da177e4 LT |
3642 | goto out; |
3643 | ||
3644 | err = -ENOBUFS; | |
3645 | skb = alloc_skb(len, GFP_KERNEL); | |
3646 | if (skb == NULL) | |
3647 | goto out; | |
3648 | ||
3649 | err = -EFAULT; | |
6ce8e9ce | 3650 | if (memcpy_from_msg(skb_put(skb,len), msg, len)) |
1da177e4 LT |
3651 | goto out; |
3652 | ||
3653 | hdr = pfkey_get_base_msg(skb, &err); | |
3654 | if (!hdr) | |
3655 | goto out; | |
3656 | ||
283bc9f3 | 3657 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 | 3658 | err = pfkey_process(sk, skb, hdr); |
283bc9f3 | 3659 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
3660 | |
3661 | out: | |
3662 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3663 | err = 0; | |
6f961068 | 3664 | kfree_skb(skb); |
1da177e4 LT |
3665 | |
3666 | return err ? : len; | |
3667 | } | |
3668 | ||
1b784140 | 3669 | static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
1da177e4 LT |
3670 | int flags) |
3671 | { | |
3672 | struct sock *sk = sock->sk; | |
83321d6b | 3673 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3674 | struct sk_buff *skb; |
3675 | int copied, err; | |
3676 | ||
3677 | err = -EINVAL; | |
3678 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3679 | goto out; | |
3680 | ||
1da177e4 LT |
3681 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); |
3682 | if (skb == NULL) | |
3683 | goto out; | |
3684 | ||
3685 | copied = skb->len; | |
3686 | if (copied > len) { | |
3687 | msg->msg_flags |= MSG_TRUNC; | |
3688 | copied = len; | |
3689 | } | |
3690 | ||
badff6d0 | 3691 | skb_reset_transport_header(skb); |
51f3d02b | 3692 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
3693 | if (err) |
3694 | goto out_free; | |
3695 | ||
3b885787 | 3696 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
3697 | |
3698 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3699 | ||
83321d6b TT |
3700 | if (pfk->dump.dump != NULL && |
3701 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3702 | pfkey_do_dump(pfk); | |
3703 | ||
1da177e4 LT |
3704 | out_free: |
3705 | skb_free_datagram(sk, skb); | |
3706 | out: | |
3707 | return err; | |
3708 | } | |
3709 | ||
90ddc4f0 | 3710 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3711 | .family = PF_KEY, |
3712 | .owner = THIS_MODULE, | |
3713 | /* Operations that make no sense on pfkey sockets. */ | |
3714 | .bind = sock_no_bind, | |
3715 | .connect = sock_no_connect, | |
3716 | .socketpair = sock_no_socketpair, | |
3717 | .accept = sock_no_accept, | |
3718 | .getname = sock_no_getname, | |
3719 | .ioctl = sock_no_ioctl, | |
3720 | .listen = sock_no_listen, | |
3721 | .shutdown = sock_no_shutdown, | |
3722 | .setsockopt = sock_no_setsockopt, | |
3723 | .getsockopt = sock_no_getsockopt, | |
3724 | .mmap = sock_no_mmap, | |
3725 | .sendpage = sock_no_sendpage, | |
3726 | ||
3727 | /* Now the operations that really occur. */ | |
3728 | .release = pfkey_release, | |
3729 | .poll = datagram_poll, | |
3730 | .sendmsg = pfkey_sendmsg, | |
3731 | .recvmsg = pfkey_recvmsg, | |
3732 | }; | |
3733 | ||
ec1b4cf7 | 3734 | static const struct net_proto_family pfkey_family_ops = { |
1da177e4 LT |
3735 | .family = PF_KEY, |
3736 | .create = pfkey_create, | |
3737 | .owner = THIS_MODULE, | |
3738 | }; | |
3739 | ||
3740 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3741 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3742 | { |
27b5b865 | 3743 | struct sock *s = sk_entry(v); |
1da177e4 | 3744 | |
bd2f7476 PE |
3745 | if (v == SEQ_START_TOKEN) |
3746 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3747 | else | |
71338aa7 | 3748 | seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n", |
1da177e4 | 3749 | s, |
41c6d650 | 3750 | refcount_read(&s->sk_refcnt), |
31e6d363 ED |
3751 | sk_rmem_alloc_get(s), |
3752 | sk_wmem_alloc_get(s), | |
a7cb5a49 | 3753 | from_kuid_munged(seq_user_ns(f), sock_i_uid(s)), |
1da177e4 LT |
3754 | sock_i_ino(s) |
3755 | ); | |
bd2f7476 PE |
3756 | return 0; |
3757 | } | |
3758 | ||
3759 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
ada440e3 | 3760 | __acquires(rcu) |
bd2f7476 | 3761 | { |
7013ec30 | 3762 | struct net *net = seq_file_net(f); |
3fa87a32 | 3763 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 3764 | |
7f6b9dbd | 3765 | rcu_read_lock(); |
3766 | return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); | |
bd2f7476 PE |
3767 | } |
3768 | ||
3769 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3770 | { | |
7013ec30 | 3771 | struct net *net = seq_file_net(f); |
3fa87a32 AD |
3772 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3773 | ||
7f6b9dbd | 3774 | return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
bd2f7476 | 3775 | } |
1da177e4 | 3776 | |
bd2f7476 | 3777 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
ada440e3 | 3778 | __releases(rcu) |
bd2f7476 | 3779 | { |
7f6b9dbd | 3780 | rcu_read_unlock(); |
bd2f7476 | 3781 | } |
1da177e4 | 3782 | |
98147d52 | 3783 | static const struct seq_operations pfkey_seq_ops = { |
bd2f7476 PE |
3784 | .start = pfkey_seq_start, |
3785 | .next = pfkey_seq_next, | |
3786 | .stop = pfkey_seq_stop, | |
3787 | .show = pfkey_seq_show, | |
3788 | }; | |
1da177e4 | 3789 | |
bd2f7476 PE |
3790 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3791 | { | |
7013ec30 AD |
3792 | return seq_open_net(inode, file, &pfkey_seq_ops, |
3793 | sizeof(struct seq_net_private)); | |
1da177e4 | 3794 | } |
61145aa1 | 3795 | |
5ca1b998 | 3796 | static const struct file_operations pfkey_proc_ops = { |
bd2f7476 PE |
3797 | .open = pfkey_seq_open, |
3798 | .read = seq_read, | |
3799 | .llseek = seq_lseek, | |
7013ec30 | 3800 | .release = seq_release_net, |
bd2f7476 PE |
3801 | }; |
3802 | ||
7013ec30 | 3803 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 | 3804 | { |
bd2f7476 PE |
3805 | struct proc_dir_entry *e; |
3806 | ||
d4beaa66 | 3807 | e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops); |
bd2f7476 | 3808 | if (e == NULL) |
61145aa1 | 3809 | return -ENOMEM; |
bd2f7476 | 3810 | |
bd2f7476 | 3811 | return 0; |
61145aa1 PE |
3812 | } |
3813 | ||
2c8c1e72 | 3814 | static void __net_exit pfkey_exit_proc(struct net *net) |
61145aa1 | 3815 | { |
ece31ffd | 3816 | remove_proc_entry("pfkey", net->proc_net); |
61145aa1 PE |
3817 | } |
3818 | #else | |
2c8c1e72 | 3819 | static inline int pfkey_init_proc(struct net *net) |
61145aa1 PE |
3820 | { |
3821 | return 0; | |
3822 | } | |
3823 | ||
2c8c1e72 | 3824 | static inline void pfkey_exit_proc(struct net *net) |
61145aa1 PE |
3825 | { |
3826 | } | |
1da177e4 LT |
3827 | #endif |
3828 | ||
3829 | static struct xfrm_mgr pfkeyv2_mgr = | |
3830 | { | |
1da177e4 LT |
3831 | .notify = pfkey_send_notify, |
3832 | .acquire = pfkey_send_acquire, | |
3833 | .compile_policy = pfkey_compile_policy, | |
3834 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3835 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3836 | .migrate = pfkey_send_migrate, |
0f24558e | 3837 | .is_alive = pfkey_is_alive, |
1da177e4 LT |
3838 | }; |
3839 | ||
3fa87a32 AD |
3840 | static int __net_init pfkey_net_init(struct net *net) |
3841 | { | |
23c049ca | 3842 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3fa87a32 AD |
3843 | int rv; |
3844 | ||
3fa87a32 AD |
3845 | INIT_HLIST_HEAD(&net_pfkey->table); |
3846 | atomic_set(&net_pfkey->socks_nr, 0); | |
23c049ca | 3847 | |
7013ec30 | 3848 | rv = pfkey_init_proc(net); |
3fa87a32 | 3849 | |
3fa87a32 AD |
3850 | return rv; |
3851 | } | |
3852 | ||
3853 | static void __net_exit pfkey_net_exit(struct net *net) | |
3854 | { | |
3855 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
3856 | ||
7013ec30 | 3857 | pfkey_exit_proc(net); |
663faeab | 3858 | WARN_ON(!hlist_empty(&net_pfkey->table)); |
3fa87a32 AD |
3859 | } |
3860 | ||
3861 | static struct pernet_operations pfkey_net_ops = { | |
3862 | .init = pfkey_net_init, | |
3863 | .exit = pfkey_net_exit, | |
23c049ca EB |
3864 | .id = &pfkey_net_id, |
3865 | .size = sizeof(struct netns_pfkey), | |
3fa87a32 AD |
3866 | }; |
3867 | ||
1da177e4 LT |
3868 | static void __exit ipsec_pfkey_exit(void) |
3869 | { | |
3870 | xfrm_unregister_km(&pfkeyv2_mgr); | |
1da177e4 | 3871 | sock_unregister(PF_KEY); |
180211b8 | 3872 | unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3873 | proto_unregister(&key_proto); |
3874 | } | |
3875 | ||
3876 | static int __init ipsec_pfkey_init(void) | |
3877 | { | |
3878 | int err = proto_register(&key_proto, 0); | |
3879 | ||
3880 | if (err != 0) | |
3881 | goto out; | |
3882 | ||
180211b8 | 3883 | err = register_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3884 | if (err != 0) |
3885 | goto out_unregister_key_proto; | |
180211b8 AD |
3886 | err = sock_register(&pfkey_family_ops); |
3887 | if (err != 0) | |
3888 | goto out_unregister_pernet; | |
1da177e4 LT |
3889 | err = xfrm_register_km(&pfkeyv2_mgr); |
3890 | if (err != 0) | |
7013ec30 | 3891 | goto out_sock_unregister; |
1da177e4 LT |
3892 | out: |
3893 | return err; | |
180211b8 | 3894 | |
1da177e4 | 3895 | out_sock_unregister: |
1da177e4 | 3896 | sock_unregister(PF_KEY); |
180211b8 AD |
3897 | out_unregister_pernet: |
3898 | unregister_pernet_subsys(&pfkey_net_ops); | |
1da177e4 LT |
3899 | out_unregister_key_proto: |
3900 | proto_unregister(&key_proto); | |
3901 | goto out; | |
3902 | } | |
3903 | ||
3904 | module_init(ipsec_pfkey_init); | |
3905 | module_exit(ipsec_pfkey_exit); | |
3906 | MODULE_LICENSE("GPL"); | |
3907 | MODULE_ALIAS_NETPROTO(PF_KEY); |