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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 | ||
404 | switch (addr->sa_family) { | |
405 | case AF_INET: | |
356f89e1 | 406 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
407 | if (sp->sadb_address_len != len || |
408 | sp->sadb_address_prefixlen > 32) | |
409 | return -EINVAL; | |
410 | break; | |
dfd56b8b | 411 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 412 | case AF_INET6: |
356f89e1 | 413 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
414 | if (sp->sadb_address_len != len || |
415 | sp->sadb_address_prefixlen > 128) | |
416 | return -EINVAL; | |
417 | break; | |
418 | #endif | |
419 | default: | |
420 | /* It is user using kernel to keep track of security | |
421 | * associations for another protocol, such as | |
422 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
423 | * lengths. | |
424 | * | |
425 | * XXX Actually, association/policy database is not yet | |
426 | * XXX able to cope with arbitrary sockaddr families. | |
427 | * XXX When it can, remove this -EINVAL. -DaveM | |
428 | */ | |
429 | return -EINVAL; | |
3ff50b79 | 430 | } |
1da177e4 LT |
431 | |
432 | return 0; | |
433 | } | |
434 | ||
4c93fbb0 | 435 | static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx) |
df71837d | 436 | { |
356f89e1 IJ |
437 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
438 | sec_ctx->sadb_x_ctx_len, | |
439 | sizeof(uint64_t)); | |
df71837d TJ |
440 | } |
441 | ||
4c93fbb0 | 442 | static inline int verify_sec_ctx_len(const void *p) |
df71837d | 443 | { |
4c93fbb0 | 444 | const struct sadb_x_sec_ctx *sec_ctx = p; |
298bb621 | 445 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 446 | |
298bb621 | 447 | if (len > PAGE_SIZE) |
df71837d TJ |
448 | return -EINVAL; |
449 | ||
450 | len = pfkey_sec_ctx_len(sec_ctx); | |
451 | ||
452 | if (sec_ctx->sadb_x_sec_len != len) | |
453 | return -EINVAL; | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
87536a81 NA |
458 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx, |
459 | gfp_t gfp) | |
df71837d TJ |
460 | { |
461 | struct xfrm_user_sec_ctx *uctx = NULL; | |
462 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
463 | ||
87536a81 | 464 | uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp); |
df71837d TJ |
465 | |
466 | if (!uctx) | |
467 | return NULL; | |
468 | ||
469 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
470 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
471 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
472 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
473 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
474 | memcpy(uctx + 1, sec_ctx + 1, | |
475 | uctx->ctx_len); | |
476 | ||
477 | return uctx; | |
478 | } | |
479 | ||
4c93fbb0 DM |
480 | static int present_and_same_family(const struct sadb_address *src, |
481 | const struct sadb_address *dst) | |
1da177e4 | 482 | { |
4c93fbb0 | 483 | const struct sockaddr *s_addr, *d_addr; |
1da177e4 LT |
484 | |
485 | if (!src || !dst) | |
486 | return 0; | |
487 | ||
4c93fbb0 DM |
488 | s_addr = (const struct sockaddr *)(src + 1); |
489 | d_addr = (const struct sockaddr *)(dst + 1); | |
1da177e4 LT |
490 | if (s_addr->sa_family != d_addr->sa_family) |
491 | return 0; | |
492 | if (s_addr->sa_family != AF_INET | |
dfd56b8b | 493 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
494 | && s_addr->sa_family != AF_INET6 |
495 | #endif | |
496 | ) | |
497 | return 0; | |
498 | ||
499 | return 1; | |
500 | } | |
501 | ||
4c93fbb0 | 502 | static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs) |
1da177e4 | 503 | { |
4c93fbb0 | 504 | const char *p = (char *) hdr; |
1da177e4 LT |
505 | int len = skb->len; |
506 | ||
507 | len -= sizeof(*hdr); | |
508 | p += sizeof(*hdr); | |
509 | while (len > 0) { | |
4c93fbb0 | 510 | const struct sadb_ext *ehdr = (const struct sadb_ext *) p; |
1da177e4 LT |
511 | uint16_t ext_type; |
512 | int ext_len; | |
513 | ||
514 | ext_len = ehdr->sadb_ext_len; | |
515 | ext_len *= sizeof(uint64_t); | |
516 | ext_type = ehdr->sadb_ext_type; | |
517 | if (ext_len < sizeof(uint64_t) || | |
518 | ext_len > len || | |
519 | ext_type == SADB_EXT_RESERVED) | |
520 | return -EINVAL; | |
521 | ||
522 | if (ext_type <= SADB_EXT_MAX) { | |
523 | int min = (int) sadb_ext_min_len[ext_type]; | |
524 | if (ext_len < min) | |
525 | return -EINVAL; | |
526 | if (ext_hdrs[ext_type-1] != NULL) | |
527 | return -EINVAL; | |
528 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
529 | ext_type == SADB_EXT_ADDRESS_DST || | |
530 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
531 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
532 | if (verify_address_len(p)) | |
533 | return -EINVAL; | |
8ff24541 | 534 | } |
df71837d TJ |
535 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
536 | if (verify_sec_ctx_len(p)) | |
537 | return -EINVAL; | |
538 | } | |
4c93fbb0 | 539 | ext_hdrs[ext_type-1] = (void *) p; |
1da177e4 LT |
540 | } |
541 | p += ext_len; | |
542 | len -= ext_len; | |
543 | } | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | static uint16_t | |
549 | pfkey_satype2proto(uint8_t satype) | |
550 | { | |
551 | switch (satype) { | |
552 | case SADB_SATYPE_UNSPEC: | |
553 | return IPSEC_PROTO_ANY; | |
554 | case SADB_SATYPE_AH: | |
555 | return IPPROTO_AH; | |
556 | case SADB_SATYPE_ESP: | |
557 | return IPPROTO_ESP; | |
558 | case SADB_X_SATYPE_IPCOMP: | |
559 | return IPPROTO_COMP; | |
1da177e4 LT |
560 | default: |
561 | return 0; | |
562 | } | |
563 | /* NOTREACHED */ | |
564 | } | |
565 | ||
566 | static uint8_t | |
567 | pfkey_proto2satype(uint16_t proto) | |
568 | { | |
569 | switch (proto) { | |
570 | case IPPROTO_AH: | |
571 | return SADB_SATYPE_AH; | |
572 | case IPPROTO_ESP: | |
573 | return SADB_SATYPE_ESP; | |
574 | case IPPROTO_COMP: | |
575 | return SADB_X_SATYPE_IPCOMP; | |
1da177e4 LT |
576 | default: |
577 | return 0; | |
578 | } | |
579 | /* NOTREACHED */ | |
580 | } | |
581 | ||
582 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
583 | * say specifically 'just raw sockets' as we encode them as 255. | |
584 | */ | |
585 | ||
586 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
587 | { | |
a02cec21 | 588 | return proto == IPSEC_PROTO_ANY ? 0 : proto; |
1da177e4 LT |
589 | } |
590 | ||
591 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
592 | { | |
a02cec21 | 593 | return proto ? proto : IPSEC_PROTO_ANY; |
1da177e4 LT |
594 | } |
595 | ||
9e8b4ed8 YH |
596 | static inline int pfkey_sockaddr_len(sa_family_t family) |
597 | { | |
598 | switch (family) { | |
599 | case AF_INET: | |
600 | return sizeof(struct sockaddr_in); | |
dfd56b8b | 601 | #if IS_ENABLED(CONFIG_IPV6) |
9e8b4ed8 YH |
602 | case AF_INET6: |
603 | return sizeof(struct sockaddr_in6); | |
604 | #endif | |
605 | } | |
606 | return 0; | |
607 | } | |
608 | ||
5f95ac91 YH |
609 | static |
610 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 611 | { |
5f95ac91 | 612 | switch (sa->sa_family) { |
1da177e4 | 613 | case AF_INET: |
8ff24541 | 614 | xaddr->a4 = |
5f95ac91 | 615 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 | 616 | return AF_INET; |
dfd56b8b | 617 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 618 | case AF_INET6: |
8ff24541 | 619 | memcpy(xaddr->a6, |
5f95ac91 | 620 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
621 | sizeof(struct in6_addr)); |
622 | return AF_INET6; | |
623 | #endif | |
1da177e4 | 624 | } |
5f95ac91 YH |
625 | return 0; |
626 | } | |
627 | ||
628 | static | |
4c93fbb0 | 629 | int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr) |
5f95ac91 YH |
630 | { |
631 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
632 | xaddr); | |
1da177e4 LT |
633 | } |
634 | ||
4c93fbb0 | 635 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 636 | { |
4c93fbb0 DM |
637 | const struct sadb_sa *sa; |
638 | const struct sadb_address *addr; | |
1da177e4 LT |
639 | uint16_t proto; |
640 | unsigned short family; | |
641 | xfrm_address_t *xaddr; | |
642 | ||
ea110733 | 643 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
644 | if (sa == NULL) |
645 | return NULL; | |
646 | ||
647 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
648 | if (proto == 0) | |
649 | return NULL; | |
650 | ||
651 | /* sadb_address_len should be checked by caller */ | |
ea110733 | 652 | addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
1da177e4 LT |
653 | if (addr == NULL) |
654 | return NULL; | |
655 | ||
4c93fbb0 | 656 | family = ((const struct sockaddr *)(addr + 1))->sa_family; |
1da177e4 LT |
657 | switch (family) { |
658 | case AF_INET: | |
4c93fbb0 | 659 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr; |
1da177e4 | 660 | break; |
dfd56b8b | 661 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 662 | case AF_INET6: |
4c93fbb0 | 663 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr; |
1da177e4 LT |
664 | break; |
665 | #endif | |
666 | default: | |
667 | xaddr = NULL; | |
668 | } | |
669 | ||
670 | if (!xaddr) | |
671 | return NULL; | |
672 | ||
bd55775c | 673 | return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family); |
1da177e4 LT |
674 | } |
675 | ||
676 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 677 | |
1da177e4 LT |
678 | static int |
679 | pfkey_sockaddr_size(sa_family_t family) | |
680 | { | |
9e8b4ed8 | 681 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
682 | } |
683 | ||
55569ce2 KM |
684 | static inline int pfkey_mode_from_xfrm(int mode) |
685 | { | |
686 | switch(mode) { | |
687 | case XFRM_MODE_TRANSPORT: | |
688 | return IPSEC_MODE_TRANSPORT; | |
689 | case XFRM_MODE_TUNNEL: | |
690 | return IPSEC_MODE_TUNNEL; | |
691 | case XFRM_MODE_BEET: | |
692 | return IPSEC_MODE_BEET; | |
693 | default: | |
694 | return -1; | |
695 | } | |
696 | } | |
697 | ||
698 | static inline int pfkey_mode_to_xfrm(int mode) | |
699 | { | |
700 | switch(mode) { | |
701 | case IPSEC_MODE_ANY: /*XXX*/ | |
702 | case IPSEC_MODE_TRANSPORT: | |
703 | return XFRM_MODE_TRANSPORT; | |
704 | case IPSEC_MODE_TUNNEL: | |
705 | return XFRM_MODE_TUNNEL; | |
706 | case IPSEC_MODE_BEET: | |
707 | return XFRM_MODE_BEET; | |
708 | default: | |
709 | return -1; | |
710 | } | |
711 | } | |
712 | ||
183cad12 | 713 | static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port, |
4c93fbb0 DM |
714 | struct sockaddr *sa, |
715 | unsigned short family) | |
e5b56652 YH |
716 | { |
717 | switch (family) { | |
718 | case AF_INET: | |
719 | { | |
720 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
721 | sin->sin_family = AF_INET; | |
722 | sin->sin_port = port; | |
723 | sin->sin_addr.s_addr = xaddr->a4; | |
724 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
725 | return 32; | |
726 | } | |
dfd56b8b | 727 | #if IS_ENABLED(CONFIG_IPV6) |
e5b56652 YH |
728 | case AF_INET6: |
729 | { | |
730 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
731 | sin6->sin6_family = AF_INET6; | |
732 | sin6->sin6_port = port; | |
733 | sin6->sin6_flowinfo = 0; | |
15e318bd | 734 | sin6->sin6_addr = xaddr->in6; |
e5b56652 YH |
735 | sin6->sin6_scope_id = 0; |
736 | return 128; | |
737 | } | |
738 | #endif | |
739 | } | |
740 | return 0; | |
741 | } | |
742 | ||
4c93fbb0 | 743 | static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, |
050f009e | 744 | int add_keys, int hsc) |
1da177e4 LT |
745 | { |
746 | struct sk_buff *skb; | |
747 | struct sadb_msg *hdr; | |
748 | struct sadb_sa *sa; | |
749 | struct sadb_lifetime *lifetime; | |
750 | struct sadb_address *addr; | |
751 | struct sadb_key *key; | |
752 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
753 | struct sadb_x_sec_ctx *sec_ctx; |
754 | struct xfrm_sec_ctx *xfrm_ctx; | |
755 | int ctx_size = 0; | |
1da177e4 LT |
756 | int size; |
757 | int auth_key_size = 0; | |
758 | int encrypt_key_size = 0; | |
759 | int sockaddr_size; | |
760 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 761 | int mode; |
1da177e4 LT |
762 | |
763 | /* address family check */ | |
764 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
765 | if (!sockaddr_size) | |
766 | return ERR_PTR(-EINVAL); | |
767 | ||
768 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
769 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 770 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
771 | sizeof(struct sadb_lifetime) + |
772 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
773 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 774 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
775 | sockaddr_size*2 + |
776 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
777 | |
778 | if ((xfrm_ctx = x->security)) { | |
779 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
780 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
781 | } | |
782 | ||
1da177e4 | 783 | /* identity & sensitivity */ |
70e94e66 | 784 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
785 | size += sizeof(struct sadb_address) + sockaddr_size; |
786 | ||
787 | if (add_keys) { | |
788 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
789 | auth_key_size = |
790 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
791 | size += sizeof(struct sadb_key) + auth_key_size; |
792 | } | |
793 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
794 | encrypt_key_size = |
795 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
796 | size += sizeof(struct sadb_key) + encrypt_key_size; |
797 | } | |
798 | } | |
799 | if (x->encap) | |
800 | natt = x->encap; | |
801 | ||
802 | if (natt && natt->encap_type) { | |
803 | size += sizeof(struct sadb_x_nat_t_type); | |
804 | size += sizeof(struct sadb_x_nat_t_port); | |
805 | size += sizeof(struct sadb_x_nat_t_port); | |
806 | } | |
807 | ||
808 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
809 | if (skb == NULL) | |
810 | return ERR_PTR(-ENOBUFS); | |
811 | ||
812 | /* call should fill header later */ | |
4df864c1 | 813 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
814 | memset(hdr, 0, size); /* XXX do we need this ? */ |
815 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
816 | ||
817 | /* sa */ | |
4df864c1 | 818 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
819 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
820 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
821 | sa->sadb_sa_spi = x->id.spi; | |
822 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
823 | switch (x->km.state) { |
824 | case XFRM_STATE_VALID: | |
825 | sa->sadb_sa_state = x->km.dying ? | |
826 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
827 | break; | |
828 | case XFRM_STATE_ACQ: | |
1da177e4 | 829 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
830 | break; |
831 | default: | |
1da177e4 | 832 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
833 | break; |
834 | } | |
1da177e4 LT |
835 | sa->sadb_sa_auth = 0; |
836 | if (x->aalg) { | |
837 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
7e50f84c JK |
838 | sa->sadb_sa_auth = (a && a->pfkey_supported) ? |
839 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
840 | } |
841 | sa->sadb_sa_encrypt = 0; | |
842 | BUG_ON(x->ealg && x->calg); | |
843 | if (x->ealg) { | |
844 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
7e50f84c JK |
845 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
846 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
847 | } |
848 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
849 | if (x->calg) { | |
850 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
7e50f84c JK |
851 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
852 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
853 | } |
854 | ||
855 | sa->sadb_sa_flags = 0; | |
856 | if (x->props.flags & XFRM_STATE_NOECN) | |
857 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
858 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
859 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
860 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
861 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
862 | |
863 | /* hard time */ | |
864 | if (hsc & 2) { | |
4df864c1 | 865 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
866 | lifetime->sadb_lifetime_len = |
867 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
868 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
869 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
870 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
871 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
872 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
873 | } | |
874 | /* soft time */ | |
875 | if (hsc & 1) { | |
4df864c1 | 876 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
877 | lifetime->sadb_lifetime_len = |
878 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
879 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
880 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
881 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
882 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
883 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
884 | } | |
885 | /* current time */ | |
4df864c1 | 886 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
887 | lifetime->sadb_lifetime_len = |
888 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
889 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
890 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
891 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
892 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
893 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
894 | /* src address */ | |
4df864c1 | 895 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 896 | addr->sadb_address_len = |
1da177e4 LT |
897 | (sizeof(struct sadb_address)+sockaddr_size)/ |
898 | sizeof(uint64_t); | |
899 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
900 | /* "if the ports are non-zero, then the sadb_address_proto field, |
901 | normally zero, MUST be filled in with the transport | |
1da177e4 | 902 | protocol's number." - RFC2367 */ |
8ff24541 | 903 | addr->sadb_address_proto = 0; |
1da177e4 | 904 | addr->sadb_address_reserved = 0; |
1da177e4 | 905 | |
e5b56652 YH |
906 | addr->sadb_address_prefixlen = |
907 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
908 | (struct sockaddr *) (addr + 1), | |
909 | x->props.family); | |
910 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
911 | BUG(); |
912 | ||
913 | /* dst address */ | |
4df864c1 | 914 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 915 | addr->sadb_address_len = |
1da177e4 LT |
916 | (sizeof(struct sadb_address)+sockaddr_size)/ |
917 | sizeof(uint64_t); | |
918 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 919 | addr->sadb_address_proto = 0; |
1da177e4 | 920 | addr->sadb_address_reserved = 0; |
1da177e4 | 921 | |
e5b56652 YH |
922 | addr->sadb_address_prefixlen = |
923 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
924 | (struct sockaddr *) (addr + 1), | |
925 | x->props.family); | |
926 | if (!addr->sadb_address_prefixlen) | |
927 | BUG(); | |
1da177e4 | 928 | |
70e94e66 YH |
929 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, |
930 | x->props.family)) { | |
4df864c1 JB |
931 | addr = skb_put(skb, |
932 | sizeof(struct sadb_address) + sockaddr_size); | |
e5b56652 YH |
933 | addr->sadb_address_len = |
934 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
935 | sizeof(uint64_t); | |
936 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
937 | addr->sadb_address_proto = | |
938 | pfkey_proto_from_xfrm(x->sel.proto); | |
939 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
940 | addr->sadb_address_reserved = 0; | |
1da177e4 | 941 | |
e5b56652 YH |
942 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
943 | (struct sockaddr *) (addr + 1), | |
944 | x->props.family); | |
1da177e4 | 945 | } |
1da177e4 LT |
946 | |
947 | /* auth key */ | |
948 | if (add_keys && auth_key_size) { | |
4df864c1 | 949 | key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size); |
1da177e4 LT |
950 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / |
951 | sizeof(uint64_t); | |
952 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
953 | key->sadb_key_bits = x->aalg->alg_key_len; | |
954 | key->sadb_key_reserved = 0; | |
955 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
956 | } | |
957 | /* encrypt key */ | |
958 | if (add_keys && encrypt_key_size) { | |
4df864c1 | 959 | key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size); |
8ff24541 | 960 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
961 | encrypt_key_size) / sizeof(uint64_t); |
962 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
963 | key->sadb_key_bits = x->ealg->alg_key_len; | |
964 | key->sadb_key_reserved = 0; | |
8ff24541 | 965 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
966 | (x->ealg->alg_key_len+7)/8); |
967 | } | |
968 | ||
969 | /* sa */ | |
4df864c1 | 970 | sa2 = skb_put(skb, sizeof(struct sadb_x_sa2)); |
1da177e4 LT |
971 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); |
972 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
973 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
974 | kfree_skb(skb); | |
975 | return ERR_PTR(-EINVAL); | |
976 | } | |
977 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
978 | sa2->sadb_x_sa2_reserved1 = 0; |
979 | sa2->sadb_x_sa2_reserved2 = 0; | |
980 | sa2->sadb_x_sa2_sequence = 0; | |
981 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
982 | ||
983 | if (natt && natt->encap_type) { | |
984 | struct sadb_x_nat_t_type *n_type; | |
985 | struct sadb_x_nat_t_port *n_port; | |
986 | ||
987 | /* type */ | |
4df864c1 | 988 | n_type = skb_put(skb, sizeof(*n_type)); |
1da177e4 LT |
989 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); |
990 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
991 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
992 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
993 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
994 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
995 | ||
996 | /* source port */ | |
4df864c1 | 997 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
998 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
999 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
1000 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
1001 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1002 | ||
1003 | /* dest port */ | |
4df864c1 | 1004 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
1005 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
1006 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
1007 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
1008 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1009 | } | |
1010 | ||
df71837d TJ |
1011 | /* security context */ |
1012 | if (xfrm_ctx) { | |
4df864c1 JB |
1013 | sec_ctx = skb_put(skb, |
1014 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
df71837d TJ |
1015 | sec_ctx->sadb_x_sec_len = |
1016 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1017 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1018 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1019 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1020 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1021 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1022 | xfrm_ctx->ctx_len); | |
1023 | } | |
1024 | ||
1da177e4 LT |
1025 | return skb; |
1026 | } | |
1027 | ||
050f009e | 1028 | |
4c93fbb0 | 1029 | static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x) |
050f009e HX |
1030 | { |
1031 | struct sk_buff *skb; | |
1032 | ||
050f009e | 1033 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1034 | |
1035 | return skb; | |
1036 | } | |
1037 | ||
4c93fbb0 | 1038 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x, |
050f009e HX |
1039 | int hsc) |
1040 | { | |
1041 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1042 | } | |
1043 | ||
07fb0f17 | 1044 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
4c93fbb0 DM |
1045 | const struct sadb_msg *hdr, |
1046 | void * const *ext_hdrs) | |
1da177e4 | 1047 | { |
8ff24541 | 1048 | struct xfrm_state *x; |
4c93fbb0 DM |
1049 | const struct sadb_lifetime *lifetime; |
1050 | const struct sadb_sa *sa; | |
1051 | const struct sadb_key *key; | |
1052 | const struct sadb_x_sec_ctx *sec_ctx; | |
1da177e4 LT |
1053 | uint16_t proto; |
1054 | int err; | |
8ff24541 | 1055 | |
1da177e4 | 1056 | |
ea110733 | 1057 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
1058 | if (!sa || |
1059 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1060 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1061 | return ERR_PTR(-EINVAL); | |
1062 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1063 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1064 | return ERR_PTR(-EINVAL); | |
1065 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1066 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1067 | return ERR_PTR(-EINVAL); | |
1068 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1069 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1070 | return ERR_PTR(-EINVAL); | |
1071 | ||
1072 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1073 | if (proto == 0) | |
1074 | return ERR_PTR(-EINVAL); | |
1075 | ||
1076 | /* default error is no buffer space */ | |
1077 | err = -ENOBUFS; | |
1078 | ||
1079 | /* RFC2367: | |
1080 | ||
1081 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1082 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1083 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1084 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1085 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1086 | not true. | |
1087 | ||
8ff24541 | 1088 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1089 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1090 | */ | |
1091 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1092 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1093 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1094 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1095 | return ERR_PTR(-EINVAL); | |
ea110733 | 1096 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1097 | if (key != NULL && |
1098 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1099 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1100 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1101 | return ERR_PTR(-EINVAL); | |
1102 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1103 | if (key != NULL && | |
1104 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1105 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1106 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1107 | return ERR_PTR(-EINVAL); | |
1108 | ||
07fb0f17 | 1109 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1110 | if (x == NULL) |
1111 | return ERR_PTR(-ENOBUFS); | |
1112 | ||
1113 | x->id.proto = proto; | |
1114 | x->id.spi = sa->sadb_sa_spi; | |
33fce60d FD |
1115 | x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay, |
1116 | (sizeof(x->replay.bitmap) * 8)); | |
1da177e4 LT |
1117 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) |
1118 | x->props.flags |= XFRM_STATE_NOECN; | |
1119 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1120 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1121 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1122 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 | 1123 | |
ea110733 | 1124 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1]; |
1da177e4 LT |
1125 | if (lifetime != NULL) { |
1126 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1127 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1128 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1129 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1130 | } | |
ea110733 | 1131 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1]; |
1da177e4 LT |
1132 | if (lifetime != NULL) { |
1133 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1134 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1135 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1136 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1137 | } | |
df71837d | 1138 | |
ea110733 | 1139 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 1140 | if (sec_ctx != NULL) { |
87536a81 | 1141 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
1142 | |
1143 | if (!uctx) | |
1144 | goto out; | |
1145 | ||
1146 | err = security_xfrm_state_alloc(x, uctx); | |
1147 | kfree(uctx); | |
1148 | ||
1149 | if (err) | |
1150 | goto out; | |
1151 | } | |
1152 | ||
e747f643 | 1153 | err = -ENOBUFS; |
ea110733 | 1154 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1155 | if (sa->sadb_sa_auth) { |
1156 | int keysize = 0; | |
1157 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
7e50f84c | 1158 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1159 | err = -ENOSYS; |
1160 | goto out; | |
1161 | } | |
1162 | if (key) | |
1163 | keysize = (key->sadb_key_bits + 7) / 8; | |
1164 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1165 | if (!x->aalg) { |
1166 | err = -ENOMEM; | |
1da177e4 | 1167 | goto out; |
1e3d0c2c | 1168 | } |
1da177e4 LT |
1169 | strcpy(x->aalg->alg_name, a->name); |
1170 | x->aalg->alg_key_len = 0; | |
1171 | if (key) { | |
1172 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1173 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1174 | } | |
c20a66f4 | 1175 | x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1da177e4 LT |
1176 | x->props.aalgo = sa->sadb_sa_auth; |
1177 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1178 | } | |
1179 | if (sa->sadb_sa_encrypt) { | |
1180 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1181 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1182 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1183 | err = -ENOSYS; |
1184 | goto out; | |
1185 | } | |
1186 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1e3d0c2c DC |
1187 | if (!x->calg) { |
1188 | err = -ENOMEM; | |
1da177e4 | 1189 | goto out; |
1e3d0c2c | 1190 | } |
1da177e4 LT |
1191 | strcpy(x->calg->alg_name, a->name); |
1192 | x->props.calgo = sa->sadb_sa_encrypt; | |
1193 | } else { | |
1194 | int keysize = 0; | |
1195 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1196 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1197 | err = -ENOSYS; |
1198 | goto out; | |
1199 | } | |
1200 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1201 | if (key) | |
1202 | keysize = (key->sadb_key_bits + 7) / 8; | |
1203 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1e3d0c2c DC |
1204 | if (!x->ealg) { |
1205 | err = -ENOMEM; | |
1da177e4 | 1206 | goto out; |
1e3d0c2c | 1207 | } |
1da177e4 LT |
1208 | strcpy(x->ealg->alg_name, a->name); |
1209 | x->ealg->alg_key_len = 0; | |
1210 | if (key) { | |
1211 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1212 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1213 | } | |
1214 | x->props.ealgo = sa->sadb_sa_encrypt; | |
69b0137f | 1215 | x->geniv = a->uinfo.encr.geniv; |
1da177e4 LT |
1216 | } |
1217 | } | |
1218 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1219 | ||
8ff24541 | 1220 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 | 1221 | &x->props.saddr); |
8ff24541 | 1222 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1223 | &x->id.daddr); |
1224 | ||
1225 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
4c93fbb0 | 1226 | const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1]; |
55569ce2 KM |
1227 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1228 | if (mode < 0) { | |
1229 | err = -EINVAL; | |
1230 | goto out; | |
1231 | } | |
1232 | x->props.mode = mode; | |
1da177e4 LT |
1233 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1234 | } | |
1235 | ||
1236 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
4c93fbb0 | 1237 | const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; |
1da177e4 LT |
1238 | |
1239 | /* Nobody uses this, but we try. */ | |
1240 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1241 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1242 | } | |
1243 | ||
4da51056 | 1244 | if (!x->sel.family) |
4a4b6271 JL |
1245 | x->sel.family = x->props.family; |
1246 | ||
1da177e4 | 1247 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
4c93fbb0 | 1248 | const struct sadb_x_nat_t_type* n_type; |
1da177e4 LT |
1249 | struct xfrm_encap_tmpl *natt; |
1250 | ||
1251 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1e3d0c2c DC |
1252 | if (!x->encap) { |
1253 | err = -ENOMEM; | |
1da177e4 | 1254 | goto out; |
1e3d0c2c | 1255 | } |
1da177e4 LT |
1256 | |
1257 | natt = x->encap; | |
1258 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1259 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1260 | ||
1261 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
4c93fbb0 | 1262 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1263 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; |
1264 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1265 | } | |
1266 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
4c93fbb0 | 1267 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1268 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; |
1269 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1270 | } | |
a8d694c6 | 1271 | memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1da177e4 LT |
1272 | } |
1273 | ||
72cb6962 HX |
1274 | err = xfrm_init_state(x); |
1275 | if (err) | |
1da177e4 | 1276 | goto out; |
72cb6962 | 1277 | |
1da177e4 | 1278 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1279 | return x; |
1280 | ||
1281 | out: | |
1282 | x->km.state = XFRM_STATE_DEAD; | |
1283 | xfrm_state_put(x); | |
1284 | return ERR_PTR(err); | |
1285 | } | |
1286 | ||
4c93fbb0 | 1287 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1288 | { |
1289 | return -EOPNOTSUPP; | |
1290 | } | |
1291 | ||
4c93fbb0 | 1292 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1293 | { |
07fb0f17 | 1294 | struct net *net = sock_net(sk); |
1da177e4 LT |
1295 | struct sk_buff *resp_skb; |
1296 | struct sadb_x_sa2 *sa2; | |
1297 | struct sadb_address *saddr, *daddr; | |
1298 | struct sadb_msg *out_hdr; | |
658b219e | 1299 | struct sadb_spirange *range; |
1da177e4 | 1300 | struct xfrm_state *x = NULL; |
55569ce2 | 1301 | int mode; |
658b219e HX |
1302 | int err; |
1303 | u32 min_spi, max_spi; | |
1da177e4 LT |
1304 | u32 reqid; |
1305 | u8 proto; | |
1306 | unsigned short family; | |
1307 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1308 | ||
1309 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1310 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1311 | return -EINVAL; | |
1312 | ||
1313 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1314 | if (proto == 0) | |
1315 | return -EINVAL; | |
1316 | ||
1317 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1318 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1319 | if (mode < 0) | |
1320 | return -EINVAL; | |
1da177e4 LT |
1321 | reqid = sa2->sadb_x_sa2_reqid; |
1322 | } else { | |
1323 | mode = 0; | |
1324 | reqid = 0; | |
1325 | } | |
1326 | ||
1327 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1328 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1329 | ||
1330 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1331 | switch (family) { | |
1332 | case AF_INET: | |
1333 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1334 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1335 | break; | |
dfd56b8b | 1336 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1337 | case AF_INET6: |
1338 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1339 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1340 | break; | |
1341 | #endif | |
1342 | } | |
1343 | ||
1344 | if (hdr->sadb_msg_seq) { | |
bd55775c | 1345 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
70e94e66 | 1346 | if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) { |
1da177e4 LT |
1347 | xfrm_state_put(x); |
1348 | x = NULL; | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | if (!x) | |
bd55775c | 1353 | x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family); |
1da177e4 LT |
1354 | |
1355 | if (x == NULL) | |
1356 | return -ENOENT; | |
1357 | ||
658b219e HX |
1358 | min_spi = 0x100; |
1359 | max_spi = 0x0fffffff; | |
1da177e4 | 1360 | |
658b219e HX |
1361 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1362 | if (range) { | |
1363 | min_spi = range->sadb_spirange_min; | |
1364 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1365 | } |
658b219e | 1366 | |
776e9dd9 FD |
1367 | err = verify_spi_info(x->id.proto, min_spi, max_spi); |
1368 | if (err) { | |
1369 | xfrm_state_put(x); | |
1370 | return err; | |
1371 | } | |
1372 | ||
658b219e | 1373 | err = xfrm_alloc_spi(x, min_spi, max_spi); |
050f009e | 1374 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1375 | |
1376 | if (IS_ERR(resp_skb)) { | |
1377 | xfrm_state_put(x); | |
1378 | return PTR_ERR(resp_skb); | |
1379 | } | |
1380 | ||
1381 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1382 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1383 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1384 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1385 | out_hdr->sadb_msg_errno = 0; | |
1386 | out_hdr->sadb_msg_reserved = 0; | |
1387 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1388 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1389 | ||
1390 | xfrm_state_put(x); | |
1391 | ||
36f41f8f | 1392 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4 LT |
1393 | |
1394 | return 0; | |
1395 | } | |
1396 | ||
4c93fbb0 | 1397 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1398 | { |
07fb0f17 | 1399 | struct net *net = sock_net(sk); |
1da177e4 LT |
1400 | struct xfrm_state *x; |
1401 | ||
1402 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1403 | return -EOPNOTSUPP; | |
1404 | ||
1405 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1406 | return 0; | |
1407 | ||
bd55775c | 1408 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4 LT |
1409 | if (x == NULL) |
1410 | return 0; | |
1411 | ||
1412 | spin_lock_bh(&x->lock); | |
5b8ef341 | 1413 | if (x->km.state == XFRM_STATE_ACQ) |
1da177e4 | 1414 | x->km.state = XFRM_STATE_ERROR; |
5b8ef341 | 1415 | |
1da177e4 LT |
1416 | spin_unlock_bh(&x->lock); |
1417 | xfrm_state_put(x); | |
1418 | return 0; | |
1419 | } | |
1420 | ||
26b15dad JHS |
1421 | static inline int event2poltype(int event) |
1422 | { | |
1423 | switch (event) { | |
f60f6b8f | 1424 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1425 | return SADB_X_SPDDELETE; |
f60f6b8f | 1426 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1427 | return SADB_X_SPDADD; |
f60f6b8f | 1428 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1429 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1430 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1431 | // return SADB_X_SPDEXPIRE; |
1432 | default: | |
207024b9 | 1433 | pr_err("pfkey: Unknown policy event %d\n", event); |
26b15dad JHS |
1434 | break; |
1435 | } | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
1440 | static inline int event2keytype(int event) | |
1441 | { | |
1442 | switch (event) { | |
f60f6b8f | 1443 | case XFRM_MSG_DELSA: |
26b15dad | 1444 | return SADB_DELETE; |
f60f6b8f | 1445 | case XFRM_MSG_NEWSA: |
26b15dad | 1446 | return SADB_ADD; |
f60f6b8f | 1447 | case XFRM_MSG_UPDSA: |
26b15dad | 1448 | return SADB_UPDATE; |
f60f6b8f | 1449 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1450 | return SADB_EXPIRE; |
1451 | default: | |
207024b9 | 1452 | pr_err("pfkey: Unknown SA event %d\n", event); |
26b15dad JHS |
1453 | break; |
1454 | } | |
1455 | ||
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | /* ADD/UPD/DEL */ | |
214e005b | 1460 | static int key_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1461 | { |
1462 | struct sk_buff *skb; | |
1463 | struct sadb_msg *hdr; | |
26b15dad | 1464 | |
050f009e | 1465 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1466 | |
1467 | if (IS_ERR(skb)) | |
1468 | return PTR_ERR(skb); | |
1469 | ||
1470 | hdr = (struct sadb_msg *) skb->data; | |
1471 | hdr->sadb_msg_version = PF_KEY_V2; | |
1472 | hdr->sadb_msg_type = event2keytype(c->event); | |
1473 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1474 | hdr->sadb_msg_errno = 0; | |
1475 | hdr->sadb_msg_reserved = 0; | |
1476 | hdr->sadb_msg_seq = c->seq; | |
15e47304 | 1477 | hdr->sadb_msg_pid = c->portid; |
26b15dad | 1478 | |
36f41f8f | 1479 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad JHS |
1480 | |
1481 | return 0; | |
1482 | } | |
1da177e4 | 1483 | |
4c93fbb0 | 1484 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1485 | { |
07fb0f17 | 1486 | struct net *net = sock_net(sk); |
1da177e4 LT |
1487 | struct xfrm_state *x; |
1488 | int err; | |
26b15dad | 1489 | struct km_event c; |
1da177e4 | 1490 | |
07fb0f17 | 1491 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4 LT |
1492 | if (IS_ERR(x)) |
1493 | return PTR_ERR(x); | |
1494 | ||
26b15dad | 1495 | xfrm_state_hold(x); |
1da177e4 LT |
1496 | if (hdr->sadb_msg_type == SADB_ADD) |
1497 | err = xfrm_state_add(x); | |
1498 | else | |
1499 | err = xfrm_state_update(x); | |
1500 | ||
2e71029e | 1501 | xfrm_audit_state_add(x, err ? 0 : 1, true); |
161a09e7 | 1502 | |
1da177e4 LT |
1503 | if (err < 0) { |
1504 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1505 | __xfrm_state_put(x); |
7d6dfe1f | 1506 | goto out; |
1da177e4 LT |
1507 | } |
1508 | ||
26b15dad | 1509 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1510 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1511 | else |
f60f6b8f | 1512 | c.event = XFRM_MSG_UPDSA; |
26b15dad | 1513 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1514 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 1515 | km_state_notify(x, &c); |
7d6dfe1f | 1516 | out: |
26b15dad | 1517 | xfrm_state_put(x); |
26b15dad | 1518 | return err; |
1da177e4 LT |
1519 | } |
1520 | ||
4c93fbb0 | 1521 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1522 | { |
07fb0f17 | 1523 | struct net *net = sock_net(sk); |
1da177e4 | 1524 | struct xfrm_state *x; |
26b15dad JHS |
1525 | struct km_event c; |
1526 | int err; | |
1da177e4 LT |
1527 | |
1528 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1529 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1530 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1531 | return -EINVAL; | |
1532 | ||
07fb0f17 | 1533 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1534 | if (x == NULL) |
1535 | return -ESRCH; | |
1536 | ||
c8c05a8e CZ |
1537 | if ((err = security_xfrm_state_delete(x))) |
1538 | goto out; | |
1539 | ||
1da177e4 | 1540 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1541 | err = -EPERM; |
1542 | goto out; | |
1da177e4 | 1543 | } |
161a09e7 | 1544 | |
26b15dad | 1545 | err = xfrm_state_delete(x); |
161a09e7 | 1546 | |
c8c05a8e CZ |
1547 | if (err < 0) |
1548 | goto out; | |
1da177e4 | 1549 | |
26b15dad | 1550 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1551 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1552 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1553 | km_state_notify(x, &c); |
c8c05a8e | 1554 | out: |
2e71029e | 1555 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
26b15dad | 1556 | xfrm_state_put(x); |
1da177e4 | 1557 | |
26b15dad | 1558 | return err; |
1da177e4 LT |
1559 | } |
1560 | ||
4c93fbb0 | 1561 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1562 | { |
07fb0f17 | 1563 | struct net *net = sock_net(sk); |
1da177e4 LT |
1564 | __u8 proto; |
1565 | struct sk_buff *out_skb; | |
1566 | struct sadb_msg *out_hdr; | |
1567 | struct xfrm_state *x; | |
1568 | ||
1569 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1570 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1571 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1572 | return -EINVAL; | |
1573 | ||
07fb0f17 | 1574 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1575 | if (x == NULL) |
1576 | return -ESRCH; | |
1577 | ||
050f009e | 1578 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1579 | proto = x->id.proto; |
1580 | xfrm_state_put(x); | |
1581 | if (IS_ERR(out_skb)) | |
1582 | return PTR_ERR(out_skb); | |
1583 | ||
1584 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1585 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1586 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1587 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1588 | out_hdr->sadb_msg_errno = 0; | |
1589 | out_hdr->sadb_msg_reserved = 0; | |
1590 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1591 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 1592 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
1593 | |
1594 | return 0; | |
1595 | } | |
1596 | ||
4c93fbb0 | 1597 | static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, |
dd0fc66f | 1598 | gfp_t allocation) |
1da177e4 LT |
1599 | { |
1600 | struct sk_buff *skb; | |
1601 | struct sadb_msg *hdr; | |
1602 | int len, auth_len, enc_len, i; | |
1603 | ||
7e50f84c | 1604 | auth_len = xfrm_count_pfkey_auth_supported(); |
1da177e4 LT |
1605 | if (auth_len) { |
1606 | auth_len *= sizeof(struct sadb_alg); | |
1607 | auth_len += sizeof(struct sadb_supported); | |
1608 | } | |
8ff24541 | 1609 | |
7e50f84c | 1610 | enc_len = xfrm_count_pfkey_enc_supported(); |
1da177e4 LT |
1611 | if (enc_len) { |
1612 | enc_len *= sizeof(struct sadb_alg); | |
1613 | enc_len += sizeof(struct sadb_supported); | |
1614 | } | |
8ff24541 | 1615 | |
1da177e4 LT |
1616 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1617 | ||
1618 | skb = alloc_skb(len + 16, allocation); | |
1619 | if (!skb) | |
1620 | goto out_put_algs; | |
1621 | ||
4df864c1 | 1622 | hdr = skb_put(skb, sizeof(*hdr)); |
1da177e4 LT |
1623 | pfkey_hdr_dup(hdr, orig); |
1624 | hdr->sadb_msg_errno = 0; | |
1625 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1626 | ||
1627 | if (auth_len) { | |
1628 | struct sadb_supported *sp; | |
1629 | struct sadb_alg *ap; | |
1630 | ||
4df864c1 | 1631 | sp = skb_put(skb, auth_len); |
1da177e4 LT |
1632 | ap = (struct sadb_alg *) (sp + 1); |
1633 | ||
1634 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1635 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1636 | ||
1637 | for (i = 0; ; i++) { | |
1638 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1639 | if (!aalg) | |
1640 | break; | |
7e50f84c JK |
1641 | if (!aalg->pfkey_supported) |
1642 | continue; | |
1da177e4 LT |
1643 | if (aalg->available) |
1644 | *ap++ = aalg->desc; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | if (enc_len) { | |
1649 | struct sadb_supported *sp; | |
1650 | struct sadb_alg *ap; | |
1651 | ||
4df864c1 | 1652 | sp = skb_put(skb, enc_len); |
1da177e4 LT |
1653 | ap = (struct sadb_alg *) (sp + 1); |
1654 | ||
1655 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1656 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1657 | ||
1658 | for (i = 0; ; i++) { | |
1659 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1660 | if (!ealg) | |
1661 | break; | |
7e50f84c JK |
1662 | if (!ealg->pfkey_supported) |
1663 | continue; | |
1da177e4 LT |
1664 | if (ealg->available) |
1665 | *ap++ = ealg->desc; | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | out_put_algs: | |
1670 | return skb; | |
1671 | } | |
1672 | ||
4c93fbb0 | 1673 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1674 | { |
1675 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1676 | struct sk_buff *supp_skb; | |
1677 | ||
1678 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1679 | return -EINVAL; | |
1680 | ||
1681 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1682 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1683 | return -EEXIST; | |
1684 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1685 | } | |
1686 | ||
1687 | xfrm_probe_algs(); | |
8ff24541 | 1688 | |
1da177e4 LT |
1689 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1690 | if (!supp_skb) { | |
1691 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1692 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1693 | ||
1694 | return -ENOBUFS; | |
1695 | } | |
1696 | ||
36f41f8f ED |
1697 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, |
1698 | sock_net(sk)); | |
1da177e4 LT |
1699 | return 0; |
1700 | } | |
1701 | ||
4c93fbb0 | 1702 | static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr) |
8be987d7 JHS |
1703 | { |
1704 | struct sk_buff *skb; | |
1705 | struct sadb_msg *hdr; | |
1706 | ||
1707 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1708 | if (!skb) | |
1709 | return -ENOBUFS; | |
1710 | ||
59ae1d12 | 1711 | hdr = skb_put_data(skb, ihdr, sizeof(struct sadb_msg)); |
8be987d7 JHS |
1712 | hdr->sadb_msg_errno = (uint8_t) 0; |
1713 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1714 | ||
36f41f8f ED |
1715 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, |
1716 | sock_net(sk)); | |
8be987d7 JHS |
1717 | } |
1718 | ||
214e005b | 1719 | static int key_notify_sa_flush(const struct km_event *c) |
26b15dad JHS |
1720 | { |
1721 | struct sk_buff *skb; | |
1722 | struct sadb_msg *hdr; | |
1723 | ||
1724 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1725 | if (!skb) | |
1726 | return -ENOBUFS; | |
4df864c1 | 1727 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
bf08867f | 1728 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1729 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad | 1730 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 1731 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
1732 | hdr->sadb_msg_version = PF_KEY_V2; |
1733 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1734 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
a5cc68f3 | 1735 | hdr->sadb_msg_reserved = 0; |
26b15dad | 1736 | |
36f41f8f | 1737 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad JHS |
1738 | |
1739 | return 0; | |
1740 | } | |
1741 | ||
4c93fbb0 | 1742 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1743 | { |
07fb0f17 | 1744 | struct net *net = sock_net(sk); |
95c96174 | 1745 | unsigned int proto; |
26b15dad | 1746 | struct km_event c; |
8be987d7 | 1747 | int err, err2; |
1da177e4 LT |
1748 | |
1749 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1750 | if (proto == 0) | |
1751 | return -EINVAL; | |
1752 | ||
2e71029e | 1753 | err = xfrm_state_flush(net, proto, true); |
8be987d7 | 1754 | err2 = unicast_flush_resp(sk, hdr); |
9e64cc95 JHS |
1755 | if (err || err2) { |
1756 | if (err == -ESRCH) /* empty table - go quietly */ | |
1757 | err = 0; | |
8be987d7 | 1758 | return err ? err : err2; |
9e64cc95 | 1759 | } |
8be987d7 | 1760 | |
bf08867f | 1761 | c.data.proto = proto; |
26b15dad | 1762 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1763 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1764 | c.event = XFRM_MSG_FLUSHSA; |
07fb0f17 | 1765 | c.net = net; |
26b15dad | 1766 | km_state_notify(NULL, &c); |
1da177e4 LT |
1767 | |
1768 | return 0; | |
1769 | } | |
1770 | ||
1da177e4 LT |
1771 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1772 | { | |
83321d6b | 1773 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1774 | struct sk_buff *out_skb; |
1775 | struct sadb_msg *out_hdr; | |
1776 | ||
83321d6b TT |
1777 | if (!pfkey_can_dump(&pfk->sk)) |
1778 | return -ENOBUFS; | |
1779 | ||
050f009e | 1780 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1781 | if (IS_ERR(out_skb)) |
1782 | return PTR_ERR(out_skb); | |
1783 | ||
1784 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1785 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1786 | out_hdr->sadb_msg_type = SADB_DUMP; |
1787 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1788 | out_hdr->sadb_msg_errno = 0; | |
1789 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1790 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 1791 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
1792 | |
1793 | if (pfk->dump.skb) | |
36f41f8f | 1794 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 1795 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
1796 | pfk->dump.skb = out_skb; |
1797 | ||
1da177e4 LT |
1798 | return 0; |
1799 | } | |
1800 | ||
83321d6b TT |
1801 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1802 | { | |
07fb0f17 AD |
1803 | struct net *net = sock_net(&pfk->sk); |
1804 | return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); | |
83321d6b TT |
1805 | } |
1806 | ||
1807 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1808 | { | |
283bc9f3 FD |
1809 | struct net *net = sock_net(&pfk->sk); |
1810 | ||
1811 | xfrm_state_walk_done(&pfk->dump.u.state, net); | |
83321d6b TT |
1812 | } |
1813 | ||
4c93fbb0 | 1814 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1815 | { |
1816 | u8 proto; | |
870a2df4 | 1817 | struct xfrm_address_filter *filter = NULL; |
83321d6b TT |
1818 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1819 | ||
89e357d8 YS |
1820 | mutex_lock(&pfk->dump_lock); |
1821 | if (pfk->dump.dump != NULL) { | |
1822 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 1823 | return -EBUSY; |
89e357d8 | 1824 | } |
1da177e4 LT |
1825 | |
1826 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
89e357d8 YS |
1827 | if (proto == 0) { |
1828 | mutex_unlock(&pfk->dump_lock); | |
1da177e4 | 1829 | return -EINVAL; |
89e357d8 | 1830 | } |
1da177e4 | 1831 | |
d3623099 ND |
1832 | if (ext_hdrs[SADB_X_EXT_FILTER - 1]) { |
1833 | struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1]; | |
1834 | ||
1835 | filter = kmalloc(sizeof(*filter), GFP_KERNEL); | |
89e357d8 YS |
1836 | if (filter == NULL) { |
1837 | mutex_unlock(&pfk->dump_lock); | |
d3623099 | 1838 | return -ENOMEM; |
89e357d8 | 1839 | } |
d3623099 ND |
1840 | |
1841 | memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr, | |
1842 | sizeof(xfrm_address_t)); | |
1843 | memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr, | |
1844 | sizeof(xfrm_address_t)); | |
1845 | filter->family = xfilter->sadb_x_filter_family; | |
1846 | filter->splen = xfilter->sadb_x_filter_splen; | |
1847 | filter->dplen = xfilter->sadb_x_filter_dplen; | |
1848 | } | |
1849 | ||
83321d6b | 1850 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 1851 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
1852 | pfk->dump.dump = pfkey_dump_sa; |
1853 | pfk->dump.done = pfkey_dump_sa_done; | |
d3623099 | 1854 | xfrm_state_walk_init(&pfk->dump.u.state, proto, filter); |
89e357d8 | 1855 | mutex_unlock(&pfk->dump_lock); |
4c563f76 | 1856 | |
83321d6b | 1857 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1858 | } |
1859 | ||
4c93fbb0 | 1860 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1861 | { |
1862 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1863 | int satype = hdr->sadb_msg_satype; | |
4c93fbb0 | 1864 | bool reset_errno = false; |
1da177e4 LT |
1865 | |
1866 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
4c93fbb0 | 1867 | reset_errno = true; |
1da177e4 LT |
1868 | if (satype != 0 && satype != 1) |
1869 | return -EINVAL; | |
1870 | pfk->promisc = satype; | |
1871 | } | |
4c93fbb0 DM |
1872 | if (reset_errno && skb_cloned(skb)) |
1873 | skb = skb_copy(skb, GFP_KERNEL); | |
1874 | else | |
1875 | skb = skb_clone(skb, GFP_KERNEL); | |
1876 | ||
1877 | if (reset_errno && skb) { | |
1878 | struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data; | |
1879 | new_hdr->sadb_msg_errno = 0; | |
1880 | } | |
1881 | ||
36f41f8f | 1882 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk)); |
1da177e4 LT |
1883 | return 0; |
1884 | } | |
1885 | ||
1886 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1887 | { | |
1888 | int i; | |
1889 | u32 reqid = *(u32*)ptr; | |
1890 | ||
1891 | for (i=0; i<xp->xfrm_nr; i++) { | |
1892 | if (xp->xfrm_vec[i].reqid == reqid) | |
1893 | return -EEXIST; | |
1894 | } | |
1895 | return 0; | |
1896 | } | |
1897 | ||
07fb0f17 | 1898 | static u32 gen_reqid(struct net *net) |
1da177e4 | 1899 | { |
4c563f76 | 1900 | struct xfrm_policy_walk walk; |
1da177e4 | 1901 | u32 start; |
4c563f76 | 1902 | int rc; |
1da177e4 LT |
1903 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1904 | ||
1905 | start = reqid; | |
1906 | do { | |
1907 | ++reqid; | |
1908 | if (reqid == 0) | |
1909 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 | 1910 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f17 | 1911 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
283bc9f3 | 1912 | xfrm_policy_walk_done(&walk, net); |
4c563f76 | 1913 | if (rc != -EEXIST) |
1da177e4 LT |
1914 | return reqid; |
1915 | } while (reqid != start); | |
1916 | return 0; | |
1917 | } | |
1918 | ||
1919 | static int | |
1920 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1921 | { | |
07fb0f17 | 1922 | struct net *net = xp_net(xp); |
1da177e4 | 1923 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce2 | 1924 | int mode; |
1da177e4 LT |
1925 | |
1926 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1927 | return -ELOOP; | |
1928 | ||
1929 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1930 | return -EINVAL; | |
1931 | ||
1932 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1933 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1934 | return -EINVAL; | |
1935 | t->mode = mode; | |
1da177e4 LT |
1936 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1937 | t->optional = 1; | |
1938 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1939 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1940 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1941 | t->reqid = 0; | |
07fb0f17 | 1942 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4 LT |
1943 | return -ENOBUFS; |
1944 | } | |
1945 | ||
1946 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1947 | if (t->mode == XFRM_MODE_TUNNEL) { |
096f41d3 | 1948 | int err; |
5f95ac91 | 1949 | |
096f41d3 HX |
1950 | err = parse_sockaddr_pair( |
1951 | (struct sockaddr *)(rq + 1), | |
1952 | rq->sadb_x_ipsecrequest_len - sizeof(*rq), | |
1953 | &t->saddr, &t->id.daddr, &t->encap_family); | |
1954 | if (err) | |
1955 | return err; | |
2718aa7c MK |
1956 | } else |
1957 | t->encap_family = xp->family; | |
1958 | ||
1da177e4 | 1959 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1960 | t->allalgs = 1; |
1da177e4 LT |
1961 | xp->xfrm_nr++; |
1962 | return 0; | |
1963 | } | |
1964 | ||
1965 | static int | |
1966 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1967 | { | |
1968 | int err; | |
1969 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1970 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1971 | ||
f674e72f DC |
1972 | if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy)) |
1973 | return -EINVAL; | |
1974 | ||
096f41d3 HX |
1975 | while (len >= sizeof(*rq)) { |
1976 | if (len < rq->sadb_x_ipsecrequest_len || | |
1977 | rq->sadb_x_ipsecrequest_len < sizeof(*rq)) | |
1978 | return -EINVAL; | |
1979 | ||
1da177e4 LT |
1980 | if ((err = parse_ipsecrequest(xp, rq)) < 0) |
1981 | return err; | |
1982 | len -= rq->sadb_x_ipsecrequest_len; | |
1983 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1984 | } | |
1985 | return 0; | |
1986 | } | |
1987 | ||
4c93fbb0 | 1988 | static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp) |
df71837d TJ |
1989 | { |
1990 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1991 | ||
1992 | if (xfrm_ctx) { | |
1993 | int len = sizeof(struct sadb_x_sec_ctx); | |
1994 | len += xfrm_ctx->ctx_len; | |
1995 | return PFKEY_ALIGN8(len); | |
1996 | } | |
1997 | return 0; | |
1998 | } | |
1999 | ||
4c93fbb0 | 2000 | static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp) |
1da177e4 | 2001 | { |
4c93fbb0 | 2002 | const struct xfrm_tmpl *t; |
1da177e4 | 2003 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
2004 | int socklen = 0; |
2005 | int i; | |
2006 | ||
2007 | for (i=0; i<xp->xfrm_nr; i++) { | |
2008 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 2009 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 2010 | } |
1da177e4 LT |
2011 | |
2012 | return sizeof(struct sadb_msg) + | |
2013 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 2014 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
2015 | (sockaddr_size * 2) + |
2016 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
2017 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
2018 | (socklen * 2) + | |
df71837d | 2019 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
2020 | } |
2021 | ||
4c93fbb0 | 2022 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp) |
1da177e4 LT |
2023 | { |
2024 | struct sk_buff *skb; | |
2025 | int size; | |
2026 | ||
2027 | size = pfkey_xfrm_policy2msg_size(xp); | |
2028 | ||
2029 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
2030 | if (skb == NULL) | |
2031 | return ERR_PTR(-ENOBUFS); | |
2032 | ||
2033 | return skb; | |
2034 | } | |
2035 | ||
4c93fbb0 | 2036 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir) |
1da177e4 LT |
2037 | { |
2038 | struct sadb_msg *hdr; | |
2039 | struct sadb_address *addr; | |
2040 | struct sadb_lifetime *lifetime; | |
2041 | struct sadb_x_policy *pol; | |
df71837d TJ |
2042 | struct sadb_x_sec_ctx *sec_ctx; |
2043 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
2044 | int i; |
2045 | int size; | |
2046 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 2047 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
2048 | |
2049 | size = pfkey_xfrm_policy2msg_size(xp); | |
2050 | ||
2051 | /* call should fill header later */ | |
4df864c1 | 2052 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
2053 | memset(hdr, 0, size); /* XXX do we need this ? */ |
2054 | ||
2055 | /* src address */ | |
4df864c1 | 2056 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 2057 | addr->sadb_address_len = |
1da177e4 LT |
2058 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2059 | sizeof(uint64_t); | |
2060 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2061 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
2062 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
2063 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2064 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2065 | xp->selector.sport, | |
2066 | (struct sockaddr *) (addr + 1), | |
2067 | xp->family)) | |
1da177e4 LT |
2068 | BUG(); |
2069 | ||
2070 | /* dst address */ | |
4df864c1 | 2071 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
2072 | addr->sadb_address_len = |
2073 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2074 | sizeof(uint64_t); | |
2075 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2076 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2077 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2078 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2079 | |
2080 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2081 | (struct sockaddr *) (addr + 1), | |
2082 | xp->family); | |
1da177e4 LT |
2083 | |
2084 | /* hard time */ | |
4df864c1 | 2085 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2086 | lifetime->sadb_lifetime_len = |
2087 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2088 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2089 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2090 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2091 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2092 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2093 | /* soft time */ | |
4df864c1 | 2094 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2095 | lifetime->sadb_lifetime_len = |
2096 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2097 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2098 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2099 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2100 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2101 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2102 | /* current time */ | |
4df864c1 | 2103 | lifetime = skb_put(skb, sizeof(struct sadb_lifetime)); |
1da177e4 LT |
2104 | lifetime->sadb_lifetime_len = |
2105 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2106 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2107 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2108 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2109 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2110 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2111 | ||
4df864c1 | 2112 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
2113 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
2114 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2115 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2116 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2117 | if (xp->xfrm_nr) | |
2118 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2119 | else | |
2120 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2121 | } | |
2122 | pol->sadb_x_policy_dir = dir+1; | |
ff862a46 | 2123 | pol->sadb_x_policy_reserved = 0; |
1da177e4 LT |
2124 | pol->sadb_x_policy_id = xp->index; |
2125 | pol->sadb_x_policy_priority = xp->priority; | |
2126 | ||
2127 | for (i=0; i<xp->xfrm_nr; i++) { | |
4c93fbb0 | 2128 | const struct xfrm_tmpl *t = xp->xfrm_vec + i; |
1da177e4 | 2129 | struct sadb_x_ipsecrequest *rq; |
1da177e4 | 2130 | int req_size; |
55569ce2 | 2131 | int mode; |
1da177e4 LT |
2132 | |
2133 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2134 | if (t->mode == XFRM_MODE_TUNNEL) { |
2135 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2136 | req_size += socklen * 2; | |
2137 | } else { | |
1da177e4 | 2138 | size -= 2*socklen; |
e5b56652 | 2139 | } |
4df864c1 | 2140 | rq = skb_put(skb, req_size); |
1da177e4 LT |
2141 | pol->sadb_x_policy_len += req_size/8; |
2142 | memset(rq, 0, sizeof(*rq)); | |
2143 | rq->sadb_x_ipsecrequest_len = req_size; | |
2144 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2145 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2146 | return -EINVAL; | |
fefaa75e | 2147 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2148 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2149 | if (t->reqid) | |
2150 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2151 | if (t->optional) | |
2152 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2153 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2154 | |
7e49e6de | 2155 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2156 | u8 *sa = (void *)(rq + 1); |
2157 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2158 | (struct sockaddr *)sa, | |
2159 | t->encap_family); | |
2160 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2161 | (struct sockaddr *) (sa + socklen), | |
2162 | t->encap_family); | |
1da177e4 LT |
2163 | } |
2164 | } | |
df71837d TJ |
2165 | |
2166 | /* security context */ | |
2167 | if ((xfrm_ctx = xp->security)) { | |
2168 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2169 | ||
4df864c1 | 2170 | sec_ctx = skb_put(skb, ctx_size); |
df71837d TJ |
2171 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); |
2172 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2173 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2174 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2175 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2176 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2177 | xfrm_ctx->ctx_len); | |
2178 | } | |
2179 | ||
1da177e4 | 2180 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
850a6212 | 2181 | hdr->sadb_msg_reserved = refcount_read(&xp->refcnt); |
55569ce2 KM |
2182 | |
2183 | return 0; | |
1da177e4 LT |
2184 | } |
2185 | ||
214e005b | 2186 | static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2187 | { |
2188 | struct sk_buff *out_skb; | |
2189 | struct sadb_msg *out_hdr; | |
2190 | int err; | |
2191 | ||
2192 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
9a127aad DC |
2193 | if (IS_ERR(out_skb)) |
2194 | return PTR_ERR(out_skb); | |
2195 | ||
55569ce2 KM |
2196 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2197 | if (err < 0) | |
2198 | return err; | |
26b15dad JHS |
2199 | |
2200 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2201 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2202 | ||
f60f6b8f | 2203 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2204 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2205 | else | |
2206 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2207 | out_hdr->sadb_msg_errno = 0; | |
2208 | out_hdr->sadb_msg_seq = c->seq; | |
15e47304 | 2209 | out_hdr->sadb_msg_pid = c->portid; |
36f41f8f | 2210 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad JHS |
2211 | return 0; |
2212 | ||
2213 | } | |
2214 | ||
4c93fbb0 | 2215 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2216 | { |
07fb0f17 | 2217 | struct net *net = sock_net(sk); |
df71837d | 2218 | int err = 0; |
1da177e4 LT |
2219 | struct sadb_lifetime *lifetime; |
2220 | struct sadb_address *sa; | |
2221 | struct sadb_x_policy *pol; | |
2222 | struct xfrm_policy *xp; | |
26b15dad | 2223 | struct km_event c; |
df71837d | 2224 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2225 | |
2226 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2227 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2228 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2229 | return -EINVAL; | |
2230 | ||
2231 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2232 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2233 | return -EINVAL; | |
2234 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2235 | return -EINVAL; | |
2236 | ||
07fb0f17 | 2237 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2238 | if (xp == NULL) |
2239 | return -ENOBUFS; | |
2240 | ||
2241 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2242 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2243 | xp->priority = pol->sadb_x_policy_priority; | |
2244 | ||
d0d79c3f | 2245 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 | 2246 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
1da177e4 LT |
2247 | xp->selector.family = xp->family; |
2248 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2249 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2250 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2251 | if (xp->selector.sport) | |
8f83f23e | 2252 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2253 | |
d0d79c3f | 2254 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2255 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2256 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2257 | ||
2258 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2259 | * in both addresses. | |
2260 | */ | |
2261 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2262 | ||
2263 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2264 | if (xp->selector.dport) | |
8f83f23e | 2265 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2266 | |
ea110733 | 2267 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2268 | if (sec_ctx != NULL) { |
87536a81 | 2269 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2270 | |
2271 | if (!uctx) { | |
2272 | err = -ENOBUFS; | |
2273 | goto out; | |
2274 | } | |
2275 | ||
52a4c640 | 2276 | err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL); |
df71837d TJ |
2277 | kfree(uctx); |
2278 | ||
2279 | if (err) | |
2280 | goto out; | |
2281 | } | |
2282 | ||
1da177e4 LT |
2283 | xp->lft.soft_byte_limit = XFRM_INF; |
2284 | xp->lft.hard_byte_limit = XFRM_INF; | |
2285 | xp->lft.soft_packet_limit = XFRM_INF; | |
2286 | xp->lft.hard_packet_limit = XFRM_INF; | |
2287 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2288 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2289 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2290 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2291 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2292 | } | |
2293 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2294 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2295 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2296 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2297 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2298 | } | |
2299 | xp->xfrm_nr = 0; | |
2300 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2301 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2302 | goto out; | |
2303 | ||
1da177e4 LT |
2304 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2305 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2306 | |
2e71029e | 2307 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 2308 | |
df71837d TJ |
2309 | if (err) |
2310 | goto out; | |
1da177e4 | 2311 | |
26b15dad | 2312 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2313 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2314 | else |
f60f6b8f | 2315 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2316 | |
26b15dad | 2317 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2318 | c.portid = hdr->sadb_msg_pid; |
1da177e4 | 2319 | |
26b15dad JHS |
2320 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2321 | xfrm_pol_put(xp); | |
1da177e4 LT |
2322 | return 0; |
2323 | ||
2324 | out: | |
12a169e7 | 2325 | xp->walk.dead = 1; |
64c31b3f | 2326 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2327 | return err; |
2328 | } | |
2329 | ||
4c93fbb0 | 2330 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2331 | { |
07fb0f17 | 2332 | struct net *net = sock_net(sk); |
1da177e4 LT |
2333 | int err; |
2334 | struct sadb_address *sa; | |
2335 | struct sadb_x_policy *pol; | |
03e1ad7b | 2336 | struct xfrm_policy *xp; |
1da177e4 | 2337 | struct xfrm_selector sel; |
26b15dad | 2338 | struct km_event c; |
df71837d | 2339 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2340 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2341 | |
2342 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2343 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2344 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2345 | return -EINVAL; | |
2346 | ||
2347 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2348 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2349 | return -EINVAL; | |
2350 | ||
2351 | memset(&sel, 0, sizeof(sel)); | |
2352 | ||
d0d79c3f | 2353 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 LT |
2354 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2355 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2356 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2357 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2358 | if (sel.sport) | |
8f83f23e | 2359 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2360 | |
d0d79c3f | 2361 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2362 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2363 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2364 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2365 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2366 | if (sel.dport) | |
8f83f23e | 2367 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2368 | |
ea110733 | 2369 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2370 | if (sec_ctx != NULL) { |
87536a81 | 2371 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2372 | |
2373 | if (!uctx) | |
2374 | return -ENOMEM; | |
2375 | ||
52a4c640 | 2376 | err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL); |
df71837d | 2377 | kfree(uctx); |
df71837d TJ |
2378 | if (err) |
2379 | return err; | |
2db3e47e | 2380 | } |
161a09e7 | 2381 | |
8ca2e93b | 2382 | xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b PM |
2383 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2384 | 1, &err); | |
2385 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2386 | if (xp == NULL) |
2387 | return -ENOENT; | |
2388 | ||
2e71029e | 2389 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
2390 | |
2391 | if (err) | |
c8c05a8e | 2392 | goto out; |
13fcfbb0 | 2393 | |
26b15dad | 2394 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2395 | c.portid = hdr->sadb_msg_pid; |
1839faab | 2396 | c.data.byid = 0; |
f60f6b8f | 2397 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2398 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2399 | ||
c8c05a8e | 2400 | out: |
26b15dad JHS |
2401 | xfrm_pol_put(xp); |
2402 | return err; | |
2403 | } | |
2404 | ||
4c93fbb0 | 2405 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir) |
26b15dad JHS |
2406 | { |
2407 | int err; | |
2408 | struct sk_buff *out_skb; | |
2409 | struct sadb_msg *out_hdr; | |
2410 | err = 0; | |
2411 | ||
1da177e4 LT |
2412 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2413 | if (IS_ERR(out_skb)) { | |
2414 | err = PTR_ERR(out_skb); | |
2415 | goto out; | |
2416 | } | |
55569ce2 KM |
2417 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2418 | if (err < 0) | |
2419 | goto out; | |
1da177e4 LT |
2420 | |
2421 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2422 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2423 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2424 | out_hdr->sadb_msg_satype = 0; |
2425 | out_hdr->sadb_msg_errno = 0; | |
2426 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2427 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
36f41f8f | 2428 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4 LT |
2429 | err = 0; |
2430 | ||
2431 | out: | |
1da177e4 LT |
2432 | return err; |
2433 | } | |
2434 | ||
08de61be SS |
2435 | static int pfkey_sockaddr_pair_size(sa_family_t family) |
2436 | { | |
9e8b4ed8 | 2437 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2438 | } |
2439 | ||
13c1d189 | 2440 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2441 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2442 | u16 *family) | |
2443 | { | |
5f95ac91 YH |
2444 | int af, socklen; |
2445 | ||
096f41d3 | 2446 | if (ext_len < 2 || ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2447 | return -EINVAL; |
2448 | ||
13c1d189 | 2449 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2450 | if (!af) |
2451 | return -EINVAL; | |
2452 | ||
2453 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2454 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2455 | daddr) != af) |
08de61be | 2456 | return -EINVAL; |
08de61be | 2457 | |
5f95ac91 | 2458 | *family = af; |
08de61be SS |
2459 | return 0; |
2460 | } | |
2461 | ||
096f41d3 | 2462 | #ifdef CONFIG_NET_KEY_MIGRATE |
08de61be SS |
2463 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, |
2464 | struct xfrm_migrate *m) | |
2465 | { | |
2466 | int err; | |
2467 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2468 | int mode; |
08de61be | 2469 | |
096f41d3 HX |
2470 | if (len < sizeof(*rq1) || |
2471 | len < rq1->sadb_x_ipsecrequest_len || | |
2472 | rq1->sadb_x_ipsecrequest_len < sizeof(*rq1)) | |
08de61be SS |
2473 | return -EINVAL; |
2474 | ||
2475 | /* old endoints */ | |
13c1d189 | 2476 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
096f41d3 | 2477 | rq1->sadb_x_ipsecrequest_len - sizeof(*rq1), |
13c1d189 | 2478 | &m->old_saddr, &m->old_daddr, |
08de61be SS |
2479 | &m->old_family); |
2480 | if (err) | |
2481 | return err; | |
2482 | ||
2483 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2484 | len -= rq1->sadb_x_ipsecrequest_len; | |
2485 | ||
096f41d3 HX |
2486 | if (len <= sizeof(*rq2) || |
2487 | len < rq2->sadb_x_ipsecrequest_len || | |
2488 | rq2->sadb_x_ipsecrequest_len < sizeof(*rq2)) | |
08de61be SS |
2489 | return -EINVAL; |
2490 | ||
2491 | /* new endpoints */ | |
13c1d189 | 2492 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
096f41d3 | 2493 | rq2->sadb_x_ipsecrequest_len - sizeof(*rq2), |
13c1d189 | 2494 | &m->new_saddr, &m->new_daddr, |
08de61be SS |
2495 | &m->new_family); |
2496 | if (err) | |
2497 | return err; | |
2498 | ||
2499 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2500 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2501 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2502 | return -EINVAL; | |
2503 | ||
2504 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2505 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2506 | return -EINVAL; | |
2507 | m->mode = mode; | |
08de61be SS |
2508 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2509 | ||
2510 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2511 | rq2->sadb_x_ipsecrequest_len)); | |
2512 | } | |
2513 | ||
2514 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2515 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2516 | { |
2517 | int i, len, ret, err = -EINVAL; | |
2518 | u8 dir; | |
2519 | struct sadb_address *sa; | |
13c1d189 | 2520 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2521 | struct sadb_x_policy *pol; |
2522 | struct sadb_x_ipsecrequest *rq; | |
2523 | struct xfrm_selector sel; | |
2524 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2525 | struct xfrm_kmaddress k; |
8d549c4f | 2526 | struct net *net = sock_net(sk); |
08de61be SS |
2527 | |
2528 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2529 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2530 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2531 | err = -EINVAL; | |
2532 | goto out; | |
2533 | } | |
2534 | ||
13c1d189 | 2535 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2536 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2537 | |
2538 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2539 | err = -EINVAL; | |
2540 | goto out; | |
2541 | } | |
2542 | ||
13c1d189 AE |
2543 | if (kma) { |
2544 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2545 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2546 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2547 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2548 | &k.local, &k.remote, &k.family); | |
2549 | if (ret < 0) { | |
2550 | err = ret; | |
2551 | goto out; | |
2552 | } | |
2553 | } | |
2554 | ||
08de61be SS |
2555 | dir = pol->sadb_x_policy_dir - 1; |
2556 | memset(&sel, 0, sizeof(sel)); | |
2557 | ||
2558 | /* set source address info of selector */ | |
2559 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2560 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2561 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2562 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2563 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2564 | if (sel.sport) | |
582ee43d | 2565 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2566 | |
2567 | /* set destination address info of selector */ | |
47162c0b | 2568 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
08de61be SS |
2569 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2570 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2571 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2572 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2573 | if (sel.dport) | |
582ee43d | 2574 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2575 | |
2576 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2577 | ||
2578 | /* extract ipsecrequests */ | |
2579 | i = 0; | |
2580 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2581 | ||
2582 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2583 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2584 | if (ret < 0) { | |
2585 | err = ret; | |
2586 | goto out; | |
2587 | } else { | |
2588 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2589 | len -= ret; | |
2590 | i++; | |
2591 | } | |
2592 | } | |
2593 | ||
2594 | if (!i || len > 0) { | |
2595 | err = -EINVAL; | |
2596 | goto out; | |
2597 | } | |
2598 | ||
13c1d189 | 2599 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
4ab47d47 | 2600 | kma ? &k : NULL, net, NULL); |
08de61be SS |
2601 | |
2602 | out: | |
2603 | return err; | |
2604 | } | |
2605 | #else | |
2606 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
7f6daa63 | 2607 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2608 | { |
2609 | return -ENOPROTOOPT; | |
2610 | } | |
2611 | #endif | |
2612 | ||
2613 | ||
4c93fbb0 | 2614 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2615 | { |
07fb0f17 | 2616 | struct net *net = sock_net(sk); |
77d8d7a6 | 2617 | unsigned int dir; |
215a2dd3 | 2618 | int err = 0, delete; |
1da177e4 LT |
2619 | struct sadb_x_policy *pol; |
2620 | struct xfrm_policy *xp; | |
26b15dad | 2621 | struct km_event c; |
1da177e4 LT |
2622 | |
2623 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2624 | return -EINVAL; | |
2625 | ||
77d8d7a6 HX |
2626 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2627 | if (dir >= XFRM_POLICY_MAX) | |
2628 | return -EINVAL; | |
2629 | ||
215a2dd3 | 2630 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
8ca2e93b | 2631 | xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
bd55775c | 2632 | dir, pol->sadb_x_policy_id, delete, &err); |
1da177e4 LT |
2633 | if (xp == NULL) |
2634 | return -ENOENT; | |
2635 | ||
215a2dd3 | 2636 | if (delete) { |
2e71029e | 2637 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
1da177e4 | 2638 | |
215a2dd3 EP |
2639 | if (err) |
2640 | goto out; | |
2641 | c.seq = hdr->sadb_msg_seq; | |
15e47304 | 2642 | c.portid = hdr->sadb_msg_pid; |
bf08867f | 2643 | c.data.byid = 1; |
f60f6b8f | 2644 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2645 | km_policy_notify(xp, dir, &c); |
26b15dad | 2646 | } else { |
77d8d7a6 | 2647 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2648 | } |
1da177e4 | 2649 | |
215a2dd3 | 2650 | out: |
1da177e4 LT |
2651 | xfrm_pol_put(xp); |
2652 | return err; | |
2653 | } | |
2654 | ||
2655 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2656 | { | |
83321d6b | 2657 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2658 | struct sk_buff *out_skb; |
2659 | struct sadb_msg *out_hdr; | |
55569ce2 | 2660 | int err; |
1da177e4 | 2661 | |
83321d6b TT |
2662 | if (!pfkey_can_dump(&pfk->sk)) |
2663 | return -ENOBUFS; | |
2664 | ||
1da177e4 LT |
2665 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2666 | if (IS_ERR(out_skb)) | |
2667 | return PTR_ERR(out_skb); | |
2668 | ||
55569ce2 KM |
2669 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2670 | if (err < 0) | |
2671 | return err; | |
1da177e4 LT |
2672 | |
2673 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2674 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2675 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2676 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2677 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2678 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 2679 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
2680 | |
2681 | if (pfk->dump.skb) | |
36f41f8f | 2682 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f17 | 2683 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
2684 | pfk->dump.skb = out_skb; |
2685 | ||
1da177e4 LT |
2686 | return 0; |
2687 | } | |
2688 | ||
83321d6b TT |
2689 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2690 | { | |
07fb0f17 AD |
2691 | struct net *net = sock_net(&pfk->sk); |
2692 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); | |
83321d6b TT |
2693 | } |
2694 | ||
2695 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2696 | { | |
283bc9f3 FD |
2697 | struct net *net = sock_net((struct sock *)pfk); |
2698 | ||
2699 | xfrm_policy_walk_done(&pfk->dump.u.policy, net); | |
83321d6b TT |
2700 | } |
2701 | ||
4c93fbb0 | 2702 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2703 | { |
83321d6b | 2704 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2705 | |
89e357d8 YS |
2706 | mutex_lock(&pfk->dump_lock); |
2707 | if (pfk->dump.dump != NULL) { | |
2708 | mutex_unlock(&pfk->dump_lock); | |
83321d6b | 2709 | return -EBUSY; |
89e357d8 | 2710 | } |
1da177e4 | 2711 | |
83321d6b | 2712 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 2713 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
2714 | pfk->dump.dump = pfkey_dump_sp; |
2715 | pfk->dump.done = pfkey_dump_sp_done; | |
2716 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
89e357d8 | 2717 | mutex_unlock(&pfk->dump_lock); |
83321d6b TT |
2718 | |
2719 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2720 | } |
2721 | ||
214e005b | 2722 | static int key_notify_policy_flush(const struct km_event *c) |
1da177e4 LT |
2723 | { |
2724 | struct sk_buff *skb_out; | |
26b15dad | 2725 | struct sadb_msg *hdr; |
1da177e4 | 2726 | |
26b15dad | 2727 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2728 | if (!skb_out) |
2729 | return -ENOBUFS; | |
4df864c1 | 2730 | hdr = skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2731 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad | 2732 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 2733 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
2734 | hdr->sadb_msg_version = PF_KEY_V2; |
2735 | hdr->sadb_msg_errno = (uint8_t) 0; | |
85dfb745 | 2736 | hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; |
26b15dad | 2737 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
a5cc68f3 | 2738 | hdr->sadb_msg_reserved = 0; |
36f41f8f | 2739 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad | 2740 | return 0; |
1da177e4 | 2741 | |
26b15dad JHS |
2742 | } |
2743 | ||
4c93fbb0 | 2744 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
26b15dad | 2745 | { |
07fb0f17 | 2746 | struct net *net = sock_net(sk); |
26b15dad | 2747 | struct km_event c; |
8be987d7 | 2748 | int err, err2; |
1da177e4 | 2749 | |
2e71029e | 2750 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true); |
8be987d7 | 2751 | err2 = unicast_flush_resp(sk, hdr); |
2f1eb65f JHS |
2752 | if (err || err2) { |
2753 | if (err == -ESRCH) /* empty table - old silent behavior */ | |
2754 | return 0; | |
2755 | return err; | |
2756 | } | |
8be987d7 | 2757 | |
f7b6983f | 2758 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2759 | c.event = XFRM_MSG_FLUSHPOLICY; |
15e47304 | 2760 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 2761 | c.seq = hdr->sadb_msg_seq; |
07fb0f17 | 2762 | c.net = net; |
26b15dad | 2763 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
2764 | |
2765 | return 0; | |
2766 | } | |
2767 | ||
2768 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2769 | const struct sadb_msg *hdr, void * const *ext_hdrs); |
8603b955 | 2770 | static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
1da177e4 LT |
2771 | [SADB_RESERVED] = pfkey_reserved, |
2772 | [SADB_GETSPI] = pfkey_getspi, | |
2773 | [SADB_UPDATE] = pfkey_add, | |
2774 | [SADB_ADD] = pfkey_add, | |
2775 | [SADB_DELETE] = pfkey_delete, | |
2776 | [SADB_GET] = pfkey_get, | |
2777 | [SADB_ACQUIRE] = pfkey_acquire, | |
2778 | [SADB_REGISTER] = pfkey_register, | |
2779 | [SADB_EXPIRE] = NULL, | |
2780 | [SADB_FLUSH] = pfkey_flush, | |
2781 | [SADB_DUMP] = pfkey_dump, | |
2782 | [SADB_X_PROMISC] = pfkey_promisc, | |
2783 | [SADB_X_PCHANGE] = NULL, | |
2784 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2785 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2786 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2787 | [SADB_X_SPDGET] = pfkey_spdget, | |
2788 | [SADB_X_SPDACQUIRE] = NULL, | |
2789 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2790 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2791 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2792 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2793 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2794 | }; |
2795 | ||
4c93fbb0 | 2796 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr) |
1da177e4 LT |
2797 | { |
2798 | void *ext_hdrs[SADB_EXT_MAX]; | |
2799 | int err; | |
2800 | ||
36f41f8f | 2801 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, |
07fb0f17 | 2802 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
1da177e4 LT |
2803 | |
2804 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2805 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2806 | if (!err) { | |
2807 | err = -EOPNOTSUPP; | |
2808 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2809 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2810 | } | |
2811 | return err; | |
2812 | } | |
2813 | ||
2814 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2815 | { | |
2816 | struct sadb_msg *hdr = NULL; | |
2817 | ||
2818 | if (skb->len < sizeof(*hdr)) { | |
2819 | *errp = -EMSGSIZE; | |
2820 | } else { | |
2821 | hdr = (struct sadb_msg *) skb->data; | |
2822 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2823 | hdr->sadb_msg_reserved != 0 || | |
2824 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2825 | hdr->sadb_msg_type > SADB_MAX)) { | |
2826 | hdr = NULL; | |
2827 | *errp = -EINVAL; | |
2828 | } else if (hdr->sadb_msg_len != (skb->len / | |
2829 | sizeof(uint64_t)) || | |
2830 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2831 | sizeof(uint64_t))) { | |
2832 | hdr = NULL; | |
2833 | *errp = -EMSGSIZE; | |
2834 | } else { | |
2835 | *errp = 0; | |
2836 | } | |
2837 | } | |
2838 | return hdr; | |
2839 | } | |
2840 | ||
4c93fbb0 DM |
2841 | static inline int aalg_tmpl_set(const struct xfrm_tmpl *t, |
2842 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2843 | { |
f398035f HX |
2844 | unsigned int id = d->desc.sadb_alg_id; |
2845 | ||
2846 | if (id >= sizeof(t->aalgos) * 8) | |
2847 | return 0; | |
2848 | ||
2849 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2850 | } |
2851 | ||
4c93fbb0 DM |
2852 | static inline int ealg_tmpl_set(const struct xfrm_tmpl *t, |
2853 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2854 | { |
f398035f HX |
2855 | unsigned int id = d->desc.sadb_alg_id; |
2856 | ||
2857 | if (id >= sizeof(t->ealgos) * 8) | |
2858 | return 0; | |
2859 | ||
2860 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2861 | } |
2862 | ||
4c93fbb0 | 2863 | static int count_ah_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2864 | { |
2865 | int i, sz = 0; | |
2866 | ||
2867 | for (i = 0; ; i++) { | |
4c93fbb0 | 2868 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2869 | if (!aalg) |
2870 | break; | |
7e50f84c JK |
2871 | if (!aalg->pfkey_supported) |
2872 | continue; | |
1da177e4 LT |
2873 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2874 | sz += sizeof(struct sadb_comb); | |
2875 | } | |
2876 | return sz + sizeof(struct sadb_prop); | |
2877 | } | |
2878 | ||
4c93fbb0 | 2879 | static int count_esp_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2880 | { |
2881 | int i, k, sz = 0; | |
2882 | ||
2883 | for (i = 0; ; i++) { | |
4c93fbb0 | 2884 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2885 | if (!ealg) |
2886 | break; | |
8ff24541 | 2887 | |
7e50f84c JK |
2888 | if (!ealg->pfkey_supported) |
2889 | continue; | |
2890 | ||
1da177e4 LT |
2891 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2892 | continue; | |
8ff24541 | 2893 | |
1da177e4 | 2894 | for (k = 1; ; k++) { |
4c93fbb0 | 2895 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2896 | if (!aalg) |
2897 | break; | |
8ff24541 | 2898 | |
7e50f84c JK |
2899 | if (!aalg->pfkey_supported) |
2900 | continue; | |
2901 | ||
1da177e4 LT |
2902 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2903 | sz += sizeof(struct sadb_comb); | |
2904 | } | |
2905 | } | |
2906 | return sz + sizeof(struct sadb_prop); | |
2907 | } | |
2908 | ||
4c93fbb0 | 2909 | static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2910 | { |
2911 | struct sadb_prop *p; | |
2912 | int i; | |
2913 | ||
4df864c1 | 2914 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2915 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2916 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2917 | p->sadb_prop_replay = 32; | |
2918 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2919 | ||
2920 | for (i = 0; ; i++) { | |
4c93fbb0 | 2921 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2922 | if (!aalg) |
2923 | break; | |
2924 | ||
7e50f84c JK |
2925 | if (!aalg->pfkey_supported) |
2926 | continue; | |
2927 | ||
1da177e4 LT |
2928 | if (aalg_tmpl_set(t, aalg) && aalg->available) { |
2929 | struct sadb_comb *c; | |
b080db58 | 2930 | c = skb_put_zero(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
2931 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; |
2932 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2933 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2934 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2935 | c->sadb_comb_hard_addtime = 24*60*60; | |
2936 | c->sadb_comb_soft_addtime = 20*60*60; | |
2937 | c->sadb_comb_hard_usetime = 8*60*60; | |
2938 | c->sadb_comb_soft_usetime = 7*60*60; | |
2939 | } | |
2940 | } | |
2941 | } | |
2942 | ||
4c93fbb0 | 2943 | static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2944 | { |
2945 | struct sadb_prop *p; | |
2946 | int i, k; | |
2947 | ||
4df864c1 | 2948 | p = skb_put(skb, sizeof(struct sadb_prop)); |
1da177e4 LT |
2949 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2950 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2951 | p->sadb_prop_replay = 32; | |
2952 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2953 | ||
2954 | for (i=0; ; i++) { | |
4c93fbb0 | 2955 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2956 | if (!ealg) |
2957 | break; | |
8ff24541 | 2958 | |
7e50f84c JK |
2959 | if (!ealg->pfkey_supported) |
2960 | continue; | |
2961 | ||
1da177e4 LT |
2962 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2963 | continue; | |
8ff24541 | 2964 | |
1da177e4 LT |
2965 | for (k = 1; ; k++) { |
2966 | struct sadb_comb *c; | |
4c93fbb0 | 2967 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2968 | if (!aalg) |
2969 | break; | |
7e50f84c JK |
2970 | if (!aalg->pfkey_supported) |
2971 | continue; | |
1da177e4 LT |
2972 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) |
2973 | continue; | |
4df864c1 | 2974 | c = skb_put(skb, sizeof(struct sadb_comb)); |
1da177e4 LT |
2975 | memset(c, 0, sizeof(*c)); |
2976 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2977 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2978 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2979 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2980 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2981 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2982 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2983 | c->sadb_comb_hard_addtime = 24*60*60; | |
2984 | c->sadb_comb_soft_addtime = 20*60*60; | |
2985 | c->sadb_comb_hard_usetime = 8*60*60; | |
2986 | c->sadb_comb_soft_usetime = 7*60*60; | |
2987 | } | |
2988 | } | |
2989 | } | |
2990 | ||
214e005b | 2991 | static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c) |
26b15dad JHS |
2992 | { |
2993 | return 0; | |
2994 | } | |
2995 | ||
214e005b | 2996 | static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2997 | { |
2998 | struct sk_buff *out_skb; | |
2999 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
3000 | int hard; |
3001 | int hsc; | |
3002 | ||
bf08867f | 3003 | hard = c->data.hard; |
26b15dad JHS |
3004 | if (hard) |
3005 | hsc = 2; | |
3006 | else | |
3007 | hsc = 1; | |
1da177e4 | 3008 | |
050f009e | 3009 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
3010 | if (IS_ERR(out_skb)) |
3011 | return PTR_ERR(out_skb); | |
3012 | ||
3013 | out_hdr = (struct sadb_msg *) out_skb->data; | |
3014 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
3015 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
3016 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3017 | out_hdr->sadb_msg_errno = 0; | |
3018 | out_hdr->sadb_msg_reserved = 0; | |
3019 | out_hdr->sadb_msg_seq = 0; | |
3020 | out_hdr->sadb_msg_pid = 0; | |
3021 | ||
36f41f8f ED |
3022 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3023 | xs_net(x)); | |
1da177e4 LT |
3024 | return 0; |
3025 | } | |
3026 | ||
214e005b | 3027 | static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 3028 | { |
07fb0f17 | 3029 | struct net *net = x ? xs_net(x) : c->net; |
3fa87a32 AD |
3030 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3031 | ||
3032 | if (atomic_read(&net_pfkey->socks_nr) == 0) | |
99c6f60e JHS |
3033 | return 0; |
3034 | ||
26b15dad | 3035 | switch (c->event) { |
f60f6b8f | 3036 | case XFRM_MSG_EXPIRE: |
26b15dad | 3037 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
3038 | case XFRM_MSG_DELSA: |
3039 | case XFRM_MSG_NEWSA: | |
3040 | case XFRM_MSG_UPDSA: | |
26b15dad | 3041 | return key_notify_sa(x, c); |
f60f6b8f | 3042 | case XFRM_MSG_FLUSHSA: |
26b15dad | 3043 | return key_notify_sa_flush(c); |
d51d081d JHS |
3044 | case XFRM_MSG_NEWAE: /* not yet supported */ |
3045 | break; | |
26b15dad | 3046 | default: |
207024b9 | 3047 | pr_err("pfkey: Unknown SA event %d\n", c->event); |
26b15dad JHS |
3048 | break; |
3049 | } | |
3050 | ||
3051 | return 0; | |
3052 | } | |
3053 | ||
214e005b | 3054 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 3055 | { |
f7b6983f MN |
3056 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
3057 | return 0; | |
3058 | ||
26b15dad | 3059 | switch (c->event) { |
f60f6b8f | 3060 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 3061 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
3062 | case XFRM_MSG_DELPOLICY: |
3063 | case XFRM_MSG_NEWPOLICY: | |
3064 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 3065 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 3066 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
3067 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
3068 | break; | |
26b15dad JHS |
3069 | return key_notify_policy_flush(c); |
3070 | default: | |
207024b9 | 3071 | pr_err("pfkey: Unknown policy event %d\n", c->event); |
26b15dad JHS |
3072 | break; |
3073 | } | |
3074 | ||
3075 | return 0; | |
3076 | } | |
3077 | ||
1da177e4 LT |
3078 | static u32 get_acqseq(void) |
3079 | { | |
3080 | u32 res; | |
28aecb9d | 3081 | static atomic_t acqseq; |
1da177e4 | 3082 | |
28aecb9d ED |
3083 | do { |
3084 | res = atomic_inc_return(&acqseq); | |
3085 | } while (!res); | |
1da177e4 LT |
3086 | return res; |
3087 | } | |
3088 | ||
0f24558e HG |
3089 | static bool pfkey_is_alive(const struct km_event *c) |
3090 | { | |
3091 | struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id); | |
3092 | struct sock *sk; | |
3093 | bool is_alive = false; | |
3094 | ||
3095 | rcu_read_lock(); | |
3096 | sk_for_each_rcu(sk, &net_pfkey->table) { | |
3097 | if (pfkey_sk(sk)->registered) { | |
3098 | is_alive = true; | |
3099 | break; | |
3100 | } | |
3101 | } | |
3102 | rcu_read_unlock(); | |
3103 | ||
3104 | return is_alive; | |
3105 | } | |
3106 | ||
65e0736b | 3107 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp) |
1da177e4 LT |
3108 | { |
3109 | struct sk_buff *skb; | |
3110 | struct sadb_msg *hdr; | |
3111 | struct sadb_address *addr; | |
3112 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3113 | int sockaddr_size; |
3114 | int size; | |
4e2ba18e VY |
3115 | struct sadb_x_sec_ctx *sec_ctx; |
3116 | struct xfrm_sec_ctx *xfrm_ctx; | |
3117 | int ctx_size = 0; | |
8ff24541 | 3118 | |
1da177e4 LT |
3119 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3120 | if (!sockaddr_size) | |
3121 | return -EINVAL; | |
3122 | ||
3123 | size = sizeof(struct sadb_msg) + | |
3124 | (sizeof(struct sadb_address) * 2) + | |
3125 | (sockaddr_size * 2) + | |
3126 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3127 | |
1da177e4 LT |
3128 | if (x->id.proto == IPPROTO_AH) |
3129 | size += count_ah_combs(t); | |
3130 | else if (x->id.proto == IPPROTO_ESP) | |
3131 | size += count_esp_combs(t); | |
3132 | ||
4e2ba18e VY |
3133 | if ((xfrm_ctx = x->security)) { |
3134 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3135 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3136 | } | |
3137 | ||
1da177e4 LT |
3138 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3139 | if (skb == NULL) | |
3140 | return -ENOMEM; | |
8ff24541 | 3141 | |
4df864c1 | 3142 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3143 | hdr->sadb_msg_version = PF_KEY_V2; |
3144 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3145 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3146 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3147 | hdr->sadb_msg_errno = 0; | |
3148 | hdr->sadb_msg_reserved = 0; | |
3149 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3150 | hdr->sadb_msg_pid = 0; | |
3151 | ||
3152 | /* src address */ | |
4df864c1 | 3153 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3154 | addr->sadb_address_len = |
1da177e4 LT |
3155 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3156 | sizeof(uint64_t); | |
3157 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3158 | addr->sadb_address_proto = 0; | |
3159 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3160 | addr->sadb_address_prefixlen = |
3161 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3162 | (struct sockaddr *) (addr + 1), | |
3163 | x->props.family); | |
3164 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3165 | BUG(); |
8ff24541 | 3166 | |
1da177e4 | 3167 | /* dst address */ |
4df864c1 | 3168 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
1da177e4 LT |
3169 | addr->sadb_address_len = |
3170 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3171 | sizeof(uint64_t); | |
3172 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3173 | addr->sadb_address_proto = 0; | |
3174 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3175 | addr->sadb_address_prefixlen = |
3176 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3177 | (struct sockaddr *) (addr + 1), | |
3178 | x->props.family); | |
3179 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3180 | BUG(); |
3181 | ||
4df864c1 | 3182 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
1da177e4 LT |
3183 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
3184 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3185 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
65e0736b | 3186 | pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1; |
ff862a46 | 3187 | pol->sadb_x_policy_reserved = 0; |
1da177e4 | 3188 | pol->sadb_x_policy_id = xp->index; |
ff862a46 | 3189 | pol->sadb_x_policy_priority = xp->priority; |
1da177e4 LT |
3190 | |
3191 | /* Set sadb_comb's. */ | |
3192 | if (x->id.proto == IPPROTO_AH) | |
3193 | dump_ah_combs(skb, t); | |
3194 | else if (x->id.proto == IPPROTO_ESP) | |
3195 | dump_esp_combs(skb, t); | |
3196 | ||
4e2ba18e VY |
3197 | /* security context */ |
3198 | if (xfrm_ctx) { | |
4df864c1 JB |
3199 | sec_ctx = skb_put(skb, |
3200 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
4e2ba18e VY |
3201 | sec_ctx->sadb_x_sec_len = |
3202 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3203 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3204 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3205 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3206 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3207 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3208 | xfrm_ctx->ctx_len); | |
3209 | } | |
3210 | ||
36f41f8f ED |
3211 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3212 | xs_net(x)); | |
1da177e4 LT |
3213 | } |
3214 | ||
cb969f07 | 3215 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3216 | u8 *data, int len, int *dir) |
1da177e4 | 3217 | { |
07fb0f17 | 3218 | struct net *net = sock_net(sk); |
1da177e4 LT |
3219 | struct xfrm_policy *xp; |
3220 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3221 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3222 | |
cb969f07 | 3223 | switch (sk->sk_family) { |
1da177e4 LT |
3224 | case AF_INET: |
3225 | if (opt != IP_IPSEC_POLICY) { | |
3226 | *dir = -EOPNOTSUPP; | |
3227 | return NULL; | |
3228 | } | |
3229 | break; | |
dfd56b8b | 3230 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
3231 | case AF_INET6: |
3232 | if (opt != IPV6_IPSEC_POLICY) { | |
3233 | *dir = -EOPNOTSUPP; | |
3234 | return NULL; | |
3235 | } | |
3236 | break; | |
3237 | #endif | |
3238 | default: | |
3239 | *dir = -EINVAL; | |
3240 | return NULL; | |
3241 | } | |
3242 | ||
3243 | *dir = -EINVAL; | |
3244 | ||
3245 | if (len < sizeof(struct sadb_x_policy) || | |
3246 | pol->sadb_x_policy_len*8 > len || | |
3247 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3248 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3249 | return NULL; | |
3250 | ||
07fb0f17 | 3251 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
3252 | if (xp == NULL) { |
3253 | *dir = -ENOBUFS; | |
3254 | return NULL; | |
3255 | } | |
3256 | ||
3257 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3258 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3259 | ||
3260 | xp->lft.soft_byte_limit = XFRM_INF; | |
3261 | xp->lft.hard_byte_limit = XFRM_INF; | |
3262 | xp->lft.soft_packet_limit = XFRM_INF; | |
3263 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3264 | xp->family = sk->sk_family; |
1da177e4 LT |
3265 | |
3266 | xp->xfrm_nr = 0; | |
3267 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3268 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3269 | goto out; | |
3270 | ||
df71837d TJ |
3271 | /* security context too */ |
3272 | if (len >= (pol->sadb_x_policy_len*8 + | |
3273 | sizeof(struct sadb_x_sec_ctx))) { | |
3274 | char *p = (char *)pol; | |
3275 | struct xfrm_user_sec_ctx *uctx; | |
3276 | ||
3277 | p += pol->sadb_x_policy_len*8; | |
3278 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3279 | if (len < pol->sadb_x_policy_len*8 + | |
d90c9024 | 3280 | sec_ctx->sadb_x_sec_len*8) { |
cb969f07 | 3281 | *dir = -EINVAL; |
df71837d | 3282 | goto out; |
cb969f07 | 3283 | } |
df71837d TJ |
3284 | if ((*dir = verify_sec_ctx_len(p))) |
3285 | goto out; | |
87536a81 | 3286 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC); |
52a4c640 | 3287 | *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC); |
df71837d TJ |
3288 | kfree(uctx); |
3289 | ||
3290 | if (*dir) | |
3291 | goto out; | |
3292 | } | |
3293 | ||
1da177e4 LT |
3294 | *dir = pol->sadb_x_policy_dir-1; |
3295 | return xp; | |
3296 | ||
3297 | out: | |
70e90679 | 3298 | xp->walk.dead = 1; |
64c31b3f | 3299 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3300 | return NULL; |
3301 | } | |
3302 | ||
5d36b180 | 3303 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3304 | { |
3305 | struct sk_buff *skb; | |
3306 | struct sadb_msg *hdr; | |
3307 | struct sadb_sa *sa; | |
3308 | struct sadb_address *addr; | |
3309 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3310 | int sockaddr_size; |
3311 | int size; | |
3312 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3313 | struct xfrm_encap_tmpl *natt = NULL; | |
3314 | ||
3315 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3316 | if (!sockaddr_size) | |
3317 | return -EINVAL; | |
3318 | ||
3319 | if (!satype) | |
3320 | return -EINVAL; | |
3321 | ||
3322 | if (!x->encap) | |
3323 | return -EINVAL; | |
3324 | ||
3325 | natt = x->encap; | |
3326 | ||
3327 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3328 | * | |
3329 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3330 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3331 | */ | |
8ff24541 | 3332 | |
1da177e4 LT |
3333 | size = sizeof(struct sadb_msg) + |
3334 | sizeof(struct sadb_sa) + | |
3335 | (sizeof(struct sadb_address) * 2) + | |
3336 | (sockaddr_size * 2) + | |
3337 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3338 | |
1da177e4 LT |
3339 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3340 | if (skb == NULL) | |
3341 | return -ENOMEM; | |
8ff24541 | 3342 | |
4df864c1 | 3343 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
1da177e4 LT |
3344 | hdr->sadb_msg_version = PF_KEY_V2; |
3345 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3346 | hdr->sadb_msg_satype = satype; | |
3347 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3348 | hdr->sadb_msg_errno = 0; | |
3349 | hdr->sadb_msg_reserved = 0; | |
3350 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3351 | hdr->sadb_msg_pid = 0; | |
3352 | ||
3353 | /* SA */ | |
4df864c1 | 3354 | sa = skb_put(skb, sizeof(struct sadb_sa)); |
1da177e4 LT |
3355 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
3356 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3357 | sa->sadb_sa_spi = x->id.spi; | |
3358 | sa->sadb_sa_replay = 0; | |
3359 | sa->sadb_sa_state = 0; | |
3360 | sa->sadb_sa_auth = 0; | |
3361 | sa->sadb_sa_encrypt = 0; | |
3362 | sa->sadb_sa_flags = 0; | |
3363 | ||
3364 | /* ADDRESS_SRC (old addr) */ | |
4df864c1 | 3365 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3366 | addr->sadb_address_len = |
1da177e4 LT |
3367 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3368 | sizeof(uint64_t); | |
3369 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3370 | addr->sadb_address_proto = 0; | |
3371 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3372 | addr->sadb_address_prefixlen = |
3373 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3374 | (struct sockaddr *) (addr + 1), | |
3375 | x->props.family); | |
3376 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3377 | BUG(); |
3378 | ||
3379 | /* NAT_T_SPORT (old port) */ | |
4df864c1 | 3380 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3381 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3382 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3383 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3384 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3385 | ||
3386 | /* ADDRESS_DST (new addr) */ | |
4df864c1 | 3387 | addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size); |
8ff24541 | 3388 | addr->sadb_address_len = |
1da177e4 LT |
3389 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3390 | sizeof(uint64_t); | |
3391 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3392 | addr->sadb_address_proto = 0; | |
3393 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3394 | addr->sadb_address_prefixlen = |
3395 | pfkey_sockaddr_fill(ipaddr, 0, | |
3396 | (struct sockaddr *) (addr + 1), | |
3397 | x->props.family); | |
3398 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3399 | BUG(); |
3400 | ||
3401 | /* NAT_T_DPORT (new port) */ | |
4df864c1 | 3402 | n_port = skb_put(skb, sizeof(*n_port)); |
1da177e4 LT |
3403 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3404 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3405 | n_port->sadb_x_nat_t_port_port = sport; | |
3406 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3407 | ||
36f41f8f ED |
3408 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, |
3409 | xs_net(x)); | |
1da177e4 LT |
3410 | } |
3411 | ||
08de61be SS |
3412 | #ifdef CONFIG_NET_KEY_MIGRATE |
3413 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
183cad12 | 3414 | const struct xfrm_selector *sel) |
08de61be SS |
3415 | { |
3416 | struct sadb_address *addr; | |
4df864c1 | 3417 | addr = skb_put(skb, sizeof(struct sadb_address) + sasize); |
08de61be SS |
3418 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; |
3419 | addr->sadb_address_exttype = type; | |
3420 | addr->sadb_address_proto = sel->proto; | |
3421 | addr->sadb_address_reserved = 0; | |
3422 | ||
3423 | switch (type) { | |
3424 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3425 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3426 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3427 | (struct sockaddr *)(addr + 1), | |
3428 | sel->family); | |
08de61be SS |
3429 | break; |
3430 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3431 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3432 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3433 | (struct sockaddr *)(addr + 1), | |
3434 | sel->family); | |
08de61be SS |
3435 | break; |
3436 | default: | |
3437 | return -EINVAL; | |
3438 | } | |
3439 | ||
3440 | return 0; | |
3441 | } | |
3442 | ||
13c1d189 | 3443 | |
183cad12 | 3444 | static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k) |
13c1d189 AE |
3445 | { |
3446 | struct sadb_x_kmaddress *kma; | |
3447 | u8 *sa; | |
3448 | int family = k->family; | |
3449 | int socklen = pfkey_sockaddr_len(family); | |
3450 | int size_req; | |
3451 | ||
3452 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3453 | pfkey_sockaddr_pair_size(family)); | |
3454 | ||
b080db58 | 3455 | kma = skb_put_zero(skb, size_req); |
13c1d189 AE |
3456 | kma->sadb_x_kmaddress_len = size_req / 8; |
3457 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3458 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3459 | ||
3460 | sa = (u8 *)(kma + 1); | |
3461 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3462 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3463 | return -EINVAL; | |
3464 | ||
3465 | return 0; | |
3466 | } | |
3467 | ||
08de61be SS |
3468 | static int set_ipsecrequest(struct sk_buff *skb, |
3469 | uint8_t proto, uint8_t mode, int level, | |
3470 | uint32_t reqid, uint8_t family, | |
183cad12 | 3471 | const xfrm_address_t *src, const xfrm_address_t *dst) |
08de61be SS |
3472 | { |
3473 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3474 | u8 *sa; |
3475 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3476 | int size_req; |
3477 | ||
3478 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3479 | pfkey_sockaddr_pair_size(family); | |
3480 | ||
b080db58 | 3481 | rq = skb_put_zero(skb, size_req); |
08de61be SS |
3482 | rq->sadb_x_ipsecrequest_len = size_req; |
3483 | rq->sadb_x_ipsecrequest_proto = proto; | |
3484 | rq->sadb_x_ipsecrequest_mode = mode; | |
3485 | rq->sadb_x_ipsecrequest_level = level; | |
3486 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3487 | ||
e5b56652 YH |
3488 | sa = (u8 *) (rq + 1); |
3489 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3490 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3491 | return -EINVAL; |
08de61be SS |
3492 | |
3493 | return 0; | |
3494 | } | |
3495 | #endif | |
3496 | ||
3497 | #ifdef CONFIG_NET_KEY_MIGRATE | |
183cad12 DM |
3498 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3499 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3500 | const struct xfrm_kmaddress *k, |
3501 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3502 | { |
3503 | int i; | |
3504 | int sasize_sel; | |
3505 | int size = 0; | |
3506 | int size_pol = 0; | |
3507 | struct sk_buff *skb; | |
3508 | struct sadb_msg *hdr; | |
3509 | struct sadb_x_policy *pol; | |
183cad12 | 3510 | const struct xfrm_migrate *mp; |
08de61be SS |
3511 | |
3512 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3513 | return 0; | |
3514 | ||
3515 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3516 | return -EINVAL; | |
3517 | ||
13c1d189 AE |
3518 | if (k != NULL) { |
3519 | /* addresses for KM */ | |
3520 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3521 | pfkey_sockaddr_pair_size(k->family)); | |
3522 | } | |
3523 | ||
08de61be SS |
3524 | /* selector */ |
3525 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3526 | if (!sasize_sel) | |
3527 | return -EINVAL; | |
3528 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3529 | ||
3530 | /* policy info */ | |
3531 | size_pol += sizeof(struct sadb_x_policy); | |
3532 | ||
3533 | /* ipsecrequests */ | |
3534 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3535 | /* old locator pair */ | |
3536 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3537 | pfkey_sockaddr_pair_size(mp->old_family); | |
3538 | /* new locator pair */ | |
3539 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3540 | pfkey_sockaddr_pair_size(mp->new_family); | |
3541 | } | |
3542 | ||
3543 | size += sizeof(struct sadb_msg) + size_pol; | |
3544 | ||
3545 | /* alloc buffer */ | |
3546 | skb = alloc_skb(size, GFP_ATOMIC); | |
3547 | if (skb == NULL) | |
3548 | return -ENOMEM; | |
3549 | ||
4df864c1 | 3550 | hdr = skb_put(skb, sizeof(struct sadb_msg)); |
08de61be SS |
3551 | hdr->sadb_msg_version = PF_KEY_V2; |
3552 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3553 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3554 | hdr->sadb_msg_len = size / 8; | |
3555 | hdr->sadb_msg_errno = 0; | |
3556 | hdr->sadb_msg_reserved = 0; | |
3557 | hdr->sadb_msg_seq = 0; | |
3558 | hdr->sadb_msg_pid = 0; | |
3559 | ||
13c1d189 AE |
3560 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3561 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
89eb06f1 | 3562 | goto err; |
13c1d189 | 3563 | |
08de61be SS |
3564 | /* selector src */ |
3565 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3566 | ||
3567 | /* selector dst */ | |
3568 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3569 | ||
3570 | /* policy information */ | |
4df864c1 | 3571 | pol = skb_put(skb, sizeof(struct sadb_x_policy)); |
08de61be SS |
3572 | pol->sadb_x_policy_len = size_pol / 8; |
3573 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3574 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3575 | pol->sadb_x_policy_dir = dir + 1; | |
ff862a46 | 3576 | pol->sadb_x_policy_reserved = 0; |
08de61be SS |
3577 | pol->sadb_x_policy_id = 0; |
3578 | pol->sadb_x_policy_priority = 0; | |
3579 | ||
3580 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3581 | /* old ipsecrequest */ | |
55569ce2 KM |
3582 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3583 | if (mode < 0) | |
d4782c32 | 3584 | goto err; |
55569ce2 | 3585 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3586 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3587 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3588 | &mp->old_saddr, &mp->old_daddr) < 0) |
3589 | goto err; | |
08de61be SS |
3590 | |
3591 | /* new ipsecrequest */ | |
55569ce2 | 3592 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3593 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3594 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3595 | &mp->new_saddr, &mp->new_daddr) < 0) |
3596 | goto err; | |
08de61be SS |
3597 | } |
3598 | ||
3599 | /* broadcast migrate message to sockets */ | |
36f41f8f | 3600 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61be SS |
3601 | |
3602 | return 0; | |
d4782c32 PM |
3603 | |
3604 | err: | |
3605 | kfree_skb(skb); | |
3606 | return -EINVAL; | |
08de61be SS |
3607 | } |
3608 | #else | |
183cad12 DM |
3609 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3610 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
3611 | const struct xfrm_kmaddress *k, |
3612 | const struct xfrm_encap_tmpl *encap) | |
08de61be SS |
3613 | { |
3614 | return -ENOPROTOOPT; | |
3615 | } | |
3616 | #endif | |
3617 | ||
1b784140 | 3618 | static int pfkey_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
1da177e4 LT |
3619 | { |
3620 | struct sock *sk = sock->sk; | |
3621 | struct sk_buff *skb = NULL; | |
3622 | struct sadb_msg *hdr = NULL; | |
3623 | int err; | |
283bc9f3 | 3624 | struct net *net = sock_net(sk); |
1da177e4 LT |
3625 | |
3626 | err = -EOPNOTSUPP; | |
3627 | if (msg->msg_flags & MSG_OOB) | |
3628 | goto out; | |
3629 | ||
3630 | err = -EMSGSIZE; | |
95c96174 | 3631 | if ((unsigned int)len > sk->sk_sndbuf - 32) |
1da177e4 LT |
3632 | goto out; |
3633 | ||
3634 | err = -ENOBUFS; | |
3635 | skb = alloc_skb(len, GFP_KERNEL); | |
3636 | if (skb == NULL) | |
3637 | goto out; | |
3638 | ||
3639 | err = -EFAULT; | |
6ce8e9ce | 3640 | if (memcpy_from_msg(skb_put(skb,len), msg, len)) |
1da177e4 LT |
3641 | goto out; |
3642 | ||
3643 | hdr = pfkey_get_base_msg(skb, &err); | |
3644 | if (!hdr) | |
3645 | goto out; | |
3646 | ||
283bc9f3 | 3647 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 | 3648 | err = pfkey_process(sk, skb, hdr); |
283bc9f3 | 3649 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
3650 | |
3651 | out: | |
3652 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3653 | err = 0; | |
6f961068 | 3654 | kfree_skb(skb); |
1da177e4 LT |
3655 | |
3656 | return err ? : len; | |
3657 | } | |
3658 | ||
1b784140 | 3659 | static int pfkey_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
1da177e4 LT |
3660 | int flags) |
3661 | { | |
3662 | struct sock *sk = sock->sk; | |
83321d6b | 3663 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3664 | struct sk_buff *skb; |
3665 | int copied, err; | |
3666 | ||
3667 | err = -EINVAL; | |
3668 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3669 | goto out; | |
3670 | ||
1da177e4 LT |
3671 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); |
3672 | if (skb == NULL) | |
3673 | goto out; | |
3674 | ||
3675 | copied = skb->len; | |
3676 | if (copied > len) { | |
3677 | msg->msg_flags |= MSG_TRUNC; | |
3678 | copied = len; | |
3679 | } | |
3680 | ||
badff6d0 | 3681 | skb_reset_transport_header(skb); |
51f3d02b | 3682 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
3683 | if (err) |
3684 | goto out_free; | |
3685 | ||
3b885787 | 3686 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
3687 | |
3688 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3689 | ||
83321d6b TT |
3690 | if (pfk->dump.dump != NULL && |
3691 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3692 | pfkey_do_dump(pfk); | |
3693 | ||
1da177e4 LT |
3694 | out_free: |
3695 | skb_free_datagram(sk, skb); | |
3696 | out: | |
3697 | return err; | |
3698 | } | |
3699 | ||
90ddc4f0 | 3700 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3701 | .family = PF_KEY, |
3702 | .owner = THIS_MODULE, | |
3703 | /* Operations that make no sense on pfkey sockets. */ | |
3704 | .bind = sock_no_bind, | |
3705 | .connect = sock_no_connect, | |
3706 | .socketpair = sock_no_socketpair, | |
3707 | .accept = sock_no_accept, | |
3708 | .getname = sock_no_getname, | |
3709 | .ioctl = sock_no_ioctl, | |
3710 | .listen = sock_no_listen, | |
3711 | .shutdown = sock_no_shutdown, | |
3712 | .setsockopt = sock_no_setsockopt, | |
3713 | .getsockopt = sock_no_getsockopt, | |
3714 | .mmap = sock_no_mmap, | |
3715 | .sendpage = sock_no_sendpage, | |
3716 | ||
3717 | /* Now the operations that really occur. */ | |
3718 | .release = pfkey_release, | |
3719 | .poll = datagram_poll, | |
3720 | .sendmsg = pfkey_sendmsg, | |
3721 | .recvmsg = pfkey_recvmsg, | |
3722 | }; | |
3723 | ||
ec1b4cf7 | 3724 | static const struct net_proto_family pfkey_family_ops = { |
1da177e4 LT |
3725 | .family = PF_KEY, |
3726 | .create = pfkey_create, | |
3727 | .owner = THIS_MODULE, | |
3728 | }; | |
3729 | ||
3730 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3731 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3732 | { |
27b5b865 | 3733 | struct sock *s = sk_entry(v); |
1da177e4 | 3734 | |
bd2f7476 PE |
3735 | if (v == SEQ_START_TOKEN) |
3736 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3737 | else | |
71338aa7 | 3738 | seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n", |
1da177e4 | 3739 | s, |
41c6d650 | 3740 | refcount_read(&s->sk_refcnt), |
31e6d363 ED |
3741 | sk_rmem_alloc_get(s), |
3742 | sk_wmem_alloc_get(s), | |
a7cb5a49 | 3743 | from_kuid_munged(seq_user_ns(f), sock_i_uid(s)), |
1da177e4 LT |
3744 | sock_i_ino(s) |
3745 | ); | |
bd2f7476 PE |
3746 | return 0; |
3747 | } | |
3748 | ||
3749 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
ada440e3 | 3750 | __acquires(rcu) |
bd2f7476 | 3751 | { |
7013ec30 | 3752 | struct net *net = seq_file_net(f); |
3fa87a32 | 3753 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 3754 | |
7f6b9dbd | 3755 | rcu_read_lock(); |
3756 | return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); | |
bd2f7476 PE |
3757 | } |
3758 | ||
3759 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3760 | { | |
7013ec30 | 3761 | struct net *net = seq_file_net(f); |
3fa87a32 AD |
3762 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3763 | ||
7f6b9dbd | 3764 | return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
bd2f7476 | 3765 | } |
1da177e4 | 3766 | |
bd2f7476 | 3767 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
ada440e3 | 3768 | __releases(rcu) |
bd2f7476 | 3769 | { |
7f6b9dbd | 3770 | rcu_read_unlock(); |
bd2f7476 | 3771 | } |
1da177e4 | 3772 | |
98147d52 | 3773 | static const struct seq_operations pfkey_seq_ops = { |
bd2f7476 PE |
3774 | .start = pfkey_seq_start, |
3775 | .next = pfkey_seq_next, | |
3776 | .stop = pfkey_seq_stop, | |
3777 | .show = pfkey_seq_show, | |
3778 | }; | |
1da177e4 | 3779 | |
bd2f7476 PE |
3780 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3781 | { | |
7013ec30 AD |
3782 | return seq_open_net(inode, file, &pfkey_seq_ops, |
3783 | sizeof(struct seq_net_private)); | |
1da177e4 | 3784 | } |
61145aa1 | 3785 | |
5ca1b998 | 3786 | static const struct file_operations pfkey_proc_ops = { |
bd2f7476 PE |
3787 | .open = pfkey_seq_open, |
3788 | .read = seq_read, | |
3789 | .llseek = seq_lseek, | |
7013ec30 | 3790 | .release = seq_release_net, |
bd2f7476 PE |
3791 | }; |
3792 | ||
7013ec30 | 3793 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 | 3794 | { |
bd2f7476 PE |
3795 | struct proc_dir_entry *e; |
3796 | ||
d4beaa66 | 3797 | e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops); |
bd2f7476 | 3798 | if (e == NULL) |
61145aa1 | 3799 | return -ENOMEM; |
bd2f7476 | 3800 | |
bd2f7476 | 3801 | return 0; |
61145aa1 PE |
3802 | } |
3803 | ||
2c8c1e72 | 3804 | static void __net_exit pfkey_exit_proc(struct net *net) |
61145aa1 | 3805 | { |
ece31ffd | 3806 | remove_proc_entry("pfkey", net->proc_net); |
61145aa1 PE |
3807 | } |
3808 | #else | |
2c8c1e72 | 3809 | static inline int pfkey_init_proc(struct net *net) |
61145aa1 PE |
3810 | { |
3811 | return 0; | |
3812 | } | |
3813 | ||
2c8c1e72 | 3814 | static inline void pfkey_exit_proc(struct net *net) |
61145aa1 PE |
3815 | { |
3816 | } | |
1da177e4 LT |
3817 | #endif |
3818 | ||
3819 | static struct xfrm_mgr pfkeyv2_mgr = | |
3820 | { | |
1da177e4 LT |
3821 | .notify = pfkey_send_notify, |
3822 | .acquire = pfkey_send_acquire, | |
3823 | .compile_policy = pfkey_compile_policy, | |
3824 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3825 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3826 | .migrate = pfkey_send_migrate, |
0f24558e | 3827 | .is_alive = pfkey_is_alive, |
1da177e4 LT |
3828 | }; |
3829 | ||
3fa87a32 AD |
3830 | static int __net_init pfkey_net_init(struct net *net) |
3831 | { | |
23c049ca | 3832 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3fa87a32 AD |
3833 | int rv; |
3834 | ||
3fa87a32 AD |
3835 | INIT_HLIST_HEAD(&net_pfkey->table); |
3836 | atomic_set(&net_pfkey->socks_nr, 0); | |
23c049ca | 3837 | |
7013ec30 | 3838 | rv = pfkey_init_proc(net); |
3fa87a32 | 3839 | |
3fa87a32 AD |
3840 | return rv; |
3841 | } | |
3842 | ||
3843 | static void __net_exit pfkey_net_exit(struct net *net) | |
3844 | { | |
3845 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
3846 | ||
7013ec30 | 3847 | pfkey_exit_proc(net); |
663faeab | 3848 | WARN_ON(!hlist_empty(&net_pfkey->table)); |
3fa87a32 AD |
3849 | } |
3850 | ||
3851 | static struct pernet_operations pfkey_net_ops = { | |
3852 | .init = pfkey_net_init, | |
3853 | .exit = pfkey_net_exit, | |
23c049ca EB |
3854 | .id = &pfkey_net_id, |
3855 | .size = sizeof(struct netns_pfkey), | |
3fa87a32 AD |
3856 | }; |
3857 | ||
1da177e4 LT |
3858 | static void __exit ipsec_pfkey_exit(void) |
3859 | { | |
3860 | xfrm_unregister_km(&pfkeyv2_mgr); | |
1da177e4 | 3861 | sock_unregister(PF_KEY); |
180211b8 | 3862 | unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3863 | proto_unregister(&key_proto); |
3864 | } | |
3865 | ||
3866 | static int __init ipsec_pfkey_init(void) | |
3867 | { | |
3868 | int err = proto_register(&key_proto, 0); | |
3869 | ||
3870 | if (err != 0) | |
3871 | goto out; | |
3872 | ||
180211b8 | 3873 | err = register_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3874 | if (err != 0) |
3875 | goto out_unregister_key_proto; | |
180211b8 AD |
3876 | err = sock_register(&pfkey_family_ops); |
3877 | if (err != 0) | |
3878 | goto out_unregister_pernet; | |
1da177e4 LT |
3879 | err = xfrm_register_km(&pfkeyv2_mgr); |
3880 | if (err != 0) | |
7013ec30 | 3881 | goto out_sock_unregister; |
1da177e4 LT |
3882 | out: |
3883 | return err; | |
180211b8 | 3884 | |
1da177e4 | 3885 | out_sock_unregister: |
1da177e4 | 3886 | sock_unregister(PF_KEY); |
180211b8 AD |
3887 | out_unregister_pernet: |
3888 | unregister_pernet_subsys(&pfkey_net_ops); | |
1da177e4 LT |
3889 | out_unregister_key_proto: |
3890 | proto_unregister(&key_proto); | |
3891 | goto out; | |
3892 | } | |
3893 | ||
3894 | module_init(ipsec_pfkey_init); | |
3895 | module_exit(ipsec_pfkey_exit); | |
3896 | MODULE_LICENSE("GPL"); | |
3897 | MODULE_ALIAS_NETPROTO(PF_KEY); |