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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> | |
457c4cbc | 29 | #include <net/net_namespace.h> |
3fa87a32 | 30 | #include <net/netns/generic.h> |
1da177e4 LT |
31 | #include <net/xfrm.h> |
32 | ||
33 | #include <net/sock.h> | |
34 | ||
35 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) | |
36 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) | |
37 | ||
3fa87a32 AD |
38 | static int pfkey_net_id; |
39 | struct netns_pfkey { | |
40 | /* List of all pfkey sockets. */ | |
41 | struct hlist_head table; | |
42 | atomic_t socks_nr; | |
43 | }; | |
1da177e4 LT |
44 | static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); |
45 | static DEFINE_RWLOCK(pfkey_table_lock); | |
46 | static atomic_t pfkey_table_users = ATOMIC_INIT(0); | |
47 | ||
1da177e4 LT |
48 | struct pfkey_sock { |
49 | /* struct sock must be the first member of struct pfkey_sock */ | |
50 | struct sock sk; | |
51 | int registered; | |
52 | int promisc; | |
83321d6b TT |
53 | |
54 | struct { | |
55 | uint8_t msg_version; | |
56 | uint32_t msg_pid; | |
57 | int (*dump)(struct pfkey_sock *sk); | |
58 | void (*done)(struct pfkey_sock *sk); | |
59 | union { | |
60 | struct xfrm_policy_walk policy; | |
61 | struct xfrm_state_walk state; | |
62 | } u; | |
12a169e7 | 63 | struct sk_buff *skb; |
83321d6b | 64 | } dump; |
1da177e4 LT |
65 | }; |
66 | ||
67 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) | |
68 | { | |
69 | return (struct pfkey_sock *)sk; | |
70 | } | |
71 | ||
83321d6b TT |
72 | static int pfkey_can_dump(struct sock *sk) |
73 | { | |
74 | if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) | |
75 | return 1; | |
76 | return 0; | |
77 | } | |
78 | ||
05238204 | 79 | static void pfkey_terminate_dump(struct pfkey_sock *pfk) |
83321d6b | 80 | { |
05238204 | 81 | if (pfk->dump.dump) { |
12a169e7 HX |
82 | if (pfk->dump.skb) { |
83 | kfree_skb(pfk->dump.skb); | |
84 | pfk->dump.skb = NULL; | |
85 | } | |
05238204 TT |
86 | pfk->dump.done(pfk); |
87 | pfk->dump.dump = NULL; | |
88 | pfk->dump.done = NULL; | |
89 | } | |
83321d6b TT |
90 | } |
91 | ||
1da177e4 LT |
92 | static void pfkey_sock_destruct(struct sock *sk) |
93 | { | |
3fa87a32 AD |
94 | struct net *net = sock_net(sk); |
95 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
96 | ||
05238204 | 97 | pfkey_terminate_dump(pfkey_sk(sk)); |
1da177e4 LT |
98 | skb_queue_purge(&sk->sk_receive_queue); |
99 | ||
100 | if (!sock_flag(sk, SOCK_DEAD)) { | |
101 | printk("Attempt to release alive pfkey socket: %p\n", sk); | |
102 | return; | |
103 | } | |
104 | ||
547b792c IJ |
105 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
106 | WARN_ON(atomic_read(&sk->sk_wmem_alloc)); | |
1da177e4 | 107 | |
3fa87a32 | 108 | atomic_dec(&net_pfkey->socks_nr); |
1da177e4 LT |
109 | } |
110 | ||
111 | static void pfkey_table_grab(void) | |
112 | { | |
113 | write_lock_bh(&pfkey_table_lock); | |
114 | ||
115 | if (atomic_read(&pfkey_table_users)) { | |
116 | DECLARE_WAITQUEUE(wait, current); | |
117 | ||
118 | add_wait_queue_exclusive(&pfkey_table_wait, &wait); | |
119 | for(;;) { | |
120 | set_current_state(TASK_UNINTERRUPTIBLE); | |
121 | if (atomic_read(&pfkey_table_users) == 0) | |
122 | break; | |
123 | write_unlock_bh(&pfkey_table_lock); | |
124 | schedule(); | |
125 | write_lock_bh(&pfkey_table_lock); | |
126 | } | |
127 | ||
128 | __set_current_state(TASK_RUNNING); | |
129 | remove_wait_queue(&pfkey_table_wait, &wait); | |
130 | } | |
131 | } | |
132 | ||
133 | static __inline__ void pfkey_table_ungrab(void) | |
134 | { | |
135 | write_unlock_bh(&pfkey_table_lock); | |
136 | wake_up(&pfkey_table_wait); | |
137 | } | |
138 | ||
139 | static __inline__ void pfkey_lock_table(void) | |
140 | { | |
141 | /* read_lock() synchronizes us to pfkey_table_grab */ | |
142 | ||
143 | read_lock(&pfkey_table_lock); | |
144 | atomic_inc(&pfkey_table_users); | |
145 | read_unlock(&pfkey_table_lock); | |
146 | } | |
147 | ||
148 | static __inline__ void pfkey_unlock_table(void) | |
149 | { | |
150 | if (atomic_dec_and_test(&pfkey_table_users)) | |
151 | wake_up(&pfkey_table_wait); | |
152 | } | |
153 | ||
154 | ||
90ddc4f0 | 155 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
156 | |
157 | static void pfkey_insert(struct sock *sk) | |
158 | { | |
3fa87a32 AD |
159 | struct net *net = sock_net(sk); |
160 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
161 | ||
1da177e4 | 162 | pfkey_table_grab(); |
3fa87a32 | 163 | sk_add_node(sk, &net_pfkey->table); |
1da177e4 LT |
164 | pfkey_table_ungrab(); |
165 | } | |
166 | ||
167 | static void pfkey_remove(struct sock *sk) | |
168 | { | |
169 | pfkey_table_grab(); | |
170 | sk_del_node_init(sk); | |
171 | pfkey_table_ungrab(); | |
172 | } | |
173 | ||
174 | static struct proto key_proto = { | |
175 | .name = "KEY", | |
176 | .owner = THIS_MODULE, | |
177 | .obj_size = sizeof(struct pfkey_sock), | |
178 | }; | |
179 | ||
1b8d7ae4 | 180 | static int pfkey_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 | 181 | { |
3fa87a32 | 182 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 LT |
183 | struct sock *sk; |
184 | int err; | |
185 | ||
186 | if (!capable(CAP_NET_ADMIN)) | |
187 | return -EPERM; | |
188 | if (sock->type != SOCK_RAW) | |
189 | return -ESOCKTNOSUPPORT; | |
190 | if (protocol != PF_KEY_V2) | |
191 | return -EPROTONOSUPPORT; | |
192 | ||
193 | err = -ENOMEM; | |
6257ff21 | 194 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto); |
1da177e4 LT |
195 | if (sk == NULL) |
196 | goto out; | |
8ff24541 | 197 | |
1da177e4 LT |
198 | sock->ops = &pfkey_ops; |
199 | sock_init_data(sock, sk); | |
200 | ||
201 | sk->sk_family = PF_KEY; | |
202 | sk->sk_destruct = pfkey_sock_destruct; | |
203 | ||
3fa87a32 | 204 | atomic_inc(&net_pfkey->socks_nr); |
1da177e4 LT |
205 | |
206 | pfkey_insert(sk); | |
207 | ||
208 | return 0; | |
209 | out: | |
210 | return err; | |
211 | } | |
212 | ||
213 | static int pfkey_release(struct socket *sock) | |
214 | { | |
215 | struct sock *sk = sock->sk; | |
216 | ||
217 | if (!sk) | |
218 | return 0; | |
219 | ||
220 | pfkey_remove(sk); | |
221 | ||
222 | sock_orphan(sk); | |
223 | sock->sk = NULL; | |
224 | skb_queue_purge(&sk->sk_write_queue); | |
225 | sock_put(sk); | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | |
dd0fc66f | 231 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
232 | { |
233 | int err = -ENOBUFS; | |
234 | ||
235 | sock_hold(sk); | |
236 | if (*skb2 == NULL) { | |
237 | if (atomic_read(&skb->users) != 1) { | |
238 | *skb2 = skb_clone(skb, allocation); | |
239 | } else { | |
240 | *skb2 = skb; | |
241 | atomic_inc(&skb->users); | |
242 | } | |
243 | } | |
244 | if (*skb2 != NULL) { | |
245 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { | |
246 | skb_orphan(*skb2); | |
247 | skb_set_owner_r(*skb2, sk); | |
248 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | |
249 | sk->sk_data_ready(sk, (*skb2)->len); | |
250 | *skb2 = NULL; | |
251 | err = 0; | |
252 | } | |
253 | } | |
254 | sock_put(sk); | |
255 | return err; | |
256 | } | |
257 | ||
258 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
259 | #define BROADCAST_ALL 0 | |
260 | #define BROADCAST_ONE 1 | |
261 | #define BROADCAST_REGISTERED 2 | |
262 | #define BROADCAST_PROMISC_ONLY 4 | |
dd0fc66f | 263 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
07fb0f17 AD |
264 | int broadcast_flags, struct sock *one_sk, |
265 | struct net *net) | |
1da177e4 | 266 | { |
3fa87a32 | 267 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 LT |
268 | struct sock *sk; |
269 | struct hlist_node *node; | |
270 | struct sk_buff *skb2 = NULL; | |
271 | int err = -ESRCH; | |
272 | ||
273 | /* XXX Do we need something like netlink_overrun? I think | |
274 | * XXX PF_KEY socket apps will not mind current behavior. | |
275 | */ | |
276 | if (!skb) | |
277 | return -ENOMEM; | |
278 | ||
279 | pfkey_lock_table(); | |
3fa87a32 | 280 | sk_for_each(sk, node, &net_pfkey->table) { |
1da177e4 LT |
281 | struct pfkey_sock *pfk = pfkey_sk(sk); |
282 | int err2; | |
283 | ||
284 | /* Yes, it means that if you are meant to receive this | |
285 | * pfkey message you receive it twice as promiscuous | |
286 | * socket. | |
287 | */ | |
288 | if (pfk->promisc) | |
289 | pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
290 | ||
291 | /* the exact target will be processed later */ | |
292 | if (sk == one_sk) | |
293 | continue; | |
294 | if (broadcast_flags != BROADCAST_ALL) { | |
295 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
296 | continue; | |
297 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
298 | !pfk->registered) | |
299 | continue; | |
300 | if (broadcast_flags & BROADCAST_ONE) | |
301 | continue; | |
302 | } | |
303 | ||
304 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
305 | ||
306 | /* Error is cleare after succecful sending to at least one | |
307 | * registered KM */ | |
308 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
309 | err = err2; | |
310 | } | |
311 | pfkey_unlock_table(); | |
312 | ||
313 | if (one_sk != NULL) | |
314 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | |
315 | ||
6f961068 | 316 | kfree_skb(skb2); |
1da177e4 LT |
317 | kfree_skb(skb); |
318 | return err; | |
319 | } | |
320 | ||
05238204 TT |
321 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
322 | { | |
12a169e7 | 323 | struct sadb_msg *hdr; |
05238204 TT |
324 | int rc; |
325 | ||
326 | rc = pfk->dump.dump(pfk); | |
327 | if (rc == -ENOBUFS) | |
328 | return 0; | |
329 | ||
12a169e7 HX |
330 | if (pfk->dump.skb) { |
331 | if (!pfkey_can_dump(&pfk->sk)) | |
332 | return 0; | |
333 | ||
334 | hdr = (struct sadb_msg *) pfk->dump.skb->data; | |
335 | hdr->sadb_msg_seq = 0; | |
336 | hdr->sadb_msg_errno = rc; | |
337 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 338 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
339 | pfk->dump.skb = NULL; |
340 | } | |
341 | ||
05238204 TT |
342 | pfkey_terminate_dump(pfk); |
343 | return rc; | |
344 | } | |
345 | ||
1da177e4 LT |
346 | static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) |
347 | { | |
348 | *new = *orig; | |
349 | } | |
350 | ||
351 | static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) | |
352 | { | |
353 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
354 | struct sadb_msg *hdr; | |
355 | ||
356 | if (!skb) | |
357 | return -ENOBUFS; | |
358 | ||
359 | /* Woe be to the platform trying to support PFKEY yet | |
360 | * having normal errnos outside the 1-255 range, inclusive. | |
361 | */ | |
362 | err = -err; | |
363 | if (err == ERESTARTSYS || | |
364 | err == ERESTARTNOHAND || | |
365 | err == ERESTARTNOINTR) | |
366 | err = EINTR; | |
367 | if (err >= 512) | |
368 | err = EINVAL; | |
09a62660 | 369 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
370 | |
371 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
372 | pfkey_hdr_dup(hdr, orig); | |
373 | hdr->sadb_msg_errno = (uint8_t) err; | |
374 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
375 | sizeof(uint64_t)); | |
376 | ||
07fb0f17 | 377 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
378 | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static u8 sadb_ext_min_len[] = { | |
383 | [SADB_EXT_RESERVED] = (u8) 0, | |
384 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
385 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
386 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
387 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
388 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
389 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
390 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
391 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
392 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
393 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
394 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
395 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
396 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
397 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
398 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
399 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
400 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
401 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
402 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
403 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
404 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
405 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
406 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 407 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
13c1d189 | 408 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
1da177e4 LT |
409 | }; |
410 | ||
411 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
412 | static int verify_address_len(void *p) | |
413 | { | |
414 | struct sadb_address *sp = p; | |
415 | struct sockaddr *addr = (struct sockaddr *)(sp + 1); | |
416 | struct sockaddr_in *sin; | |
417 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
418 | struct sockaddr_in6 *sin6; | |
419 | #endif | |
420 | int len; | |
421 | ||
422 | switch (addr->sa_family) { | |
423 | case AF_INET: | |
356f89e1 | 424 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
425 | if (sp->sadb_address_len != len || |
426 | sp->sadb_address_prefixlen > 32) | |
427 | return -EINVAL; | |
428 | break; | |
429 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
430 | case AF_INET6: | |
356f89e1 | 431 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
432 | if (sp->sadb_address_len != len || |
433 | sp->sadb_address_prefixlen > 128) | |
434 | return -EINVAL; | |
435 | break; | |
436 | #endif | |
437 | default: | |
438 | /* It is user using kernel to keep track of security | |
439 | * associations for another protocol, such as | |
440 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
441 | * lengths. | |
442 | * | |
443 | * XXX Actually, association/policy database is not yet | |
444 | * XXX able to cope with arbitrary sockaddr families. | |
445 | * XXX When it can, remove this -EINVAL. -DaveM | |
446 | */ | |
447 | return -EINVAL; | |
448 | break; | |
3ff50b79 | 449 | } |
1da177e4 LT |
450 | |
451 | return 0; | |
452 | } | |
453 | ||
df71837d TJ |
454 | static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) |
455 | { | |
356f89e1 IJ |
456 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
457 | sec_ctx->sadb_x_ctx_len, | |
458 | sizeof(uint64_t)); | |
df71837d TJ |
459 | } |
460 | ||
461 | static inline int verify_sec_ctx_len(void *p) | |
462 | { | |
463 | struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; | |
298bb621 | 464 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 465 | |
298bb621 | 466 | if (len > PAGE_SIZE) |
df71837d TJ |
467 | return -EINVAL; |
468 | ||
469 | len = pfkey_sec_ctx_len(sec_ctx); | |
470 | ||
471 | if (sec_ctx->sadb_x_sec_len != len) | |
472 | return -EINVAL; | |
473 | ||
474 | return 0; | |
475 | } | |
476 | ||
477 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) | |
478 | { | |
479 | struct xfrm_user_sec_ctx *uctx = NULL; | |
480 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
481 | ||
482 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); | |
483 | ||
484 | if (!uctx) | |
485 | return NULL; | |
486 | ||
487 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
488 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
489 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
490 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
491 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
492 | memcpy(uctx + 1, sec_ctx + 1, | |
493 | uctx->ctx_len); | |
494 | ||
495 | return uctx; | |
496 | } | |
497 | ||
1da177e4 LT |
498 | static int present_and_same_family(struct sadb_address *src, |
499 | struct sadb_address *dst) | |
500 | { | |
501 | struct sockaddr *s_addr, *d_addr; | |
502 | ||
503 | if (!src || !dst) | |
504 | return 0; | |
505 | ||
506 | s_addr = (struct sockaddr *)(src + 1); | |
507 | d_addr = (struct sockaddr *)(dst + 1); | |
508 | if (s_addr->sa_family != d_addr->sa_family) | |
509 | return 0; | |
510 | if (s_addr->sa_family != AF_INET | |
511 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
512 | && s_addr->sa_family != AF_INET6 | |
513 | #endif | |
514 | ) | |
515 | return 0; | |
516 | ||
517 | return 1; | |
518 | } | |
519 | ||
520 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
521 | { | |
522 | char *p = (char *) hdr; | |
523 | int len = skb->len; | |
524 | ||
525 | len -= sizeof(*hdr); | |
526 | p += sizeof(*hdr); | |
527 | while (len > 0) { | |
528 | struct sadb_ext *ehdr = (struct sadb_ext *) p; | |
529 | uint16_t ext_type; | |
530 | int ext_len; | |
531 | ||
532 | ext_len = ehdr->sadb_ext_len; | |
533 | ext_len *= sizeof(uint64_t); | |
534 | ext_type = ehdr->sadb_ext_type; | |
535 | if (ext_len < sizeof(uint64_t) || | |
536 | ext_len > len || | |
537 | ext_type == SADB_EXT_RESERVED) | |
538 | return -EINVAL; | |
539 | ||
540 | if (ext_type <= SADB_EXT_MAX) { | |
541 | int min = (int) sadb_ext_min_len[ext_type]; | |
542 | if (ext_len < min) | |
543 | return -EINVAL; | |
544 | if (ext_hdrs[ext_type-1] != NULL) | |
545 | return -EINVAL; | |
546 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
547 | ext_type == SADB_EXT_ADDRESS_DST || | |
548 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
549 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
550 | if (verify_address_len(p)) | |
551 | return -EINVAL; | |
8ff24541 | 552 | } |
df71837d TJ |
553 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
554 | if (verify_sec_ctx_len(p)) | |
555 | return -EINVAL; | |
556 | } | |
1da177e4 LT |
557 | ext_hdrs[ext_type-1] = p; |
558 | } | |
559 | p += ext_len; | |
560 | len -= ext_len; | |
561 | } | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | static uint16_t | |
567 | pfkey_satype2proto(uint8_t satype) | |
568 | { | |
569 | switch (satype) { | |
570 | case SADB_SATYPE_UNSPEC: | |
571 | return IPSEC_PROTO_ANY; | |
572 | case SADB_SATYPE_AH: | |
573 | return IPPROTO_AH; | |
574 | case SADB_SATYPE_ESP: | |
575 | return IPPROTO_ESP; | |
576 | case SADB_X_SATYPE_IPCOMP: | |
577 | return IPPROTO_COMP; | |
578 | break; | |
579 | default: | |
580 | return 0; | |
581 | } | |
582 | /* NOTREACHED */ | |
583 | } | |
584 | ||
585 | static uint8_t | |
586 | pfkey_proto2satype(uint16_t proto) | |
587 | { | |
588 | switch (proto) { | |
589 | case IPPROTO_AH: | |
590 | return SADB_SATYPE_AH; | |
591 | case IPPROTO_ESP: | |
592 | return SADB_SATYPE_ESP; | |
593 | case IPPROTO_COMP: | |
594 | return SADB_X_SATYPE_IPCOMP; | |
595 | break; | |
596 | default: | |
597 | return 0; | |
598 | } | |
599 | /* NOTREACHED */ | |
600 | } | |
601 | ||
602 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
603 | * say specifically 'just raw sockets' as we encode them as 255. | |
604 | */ | |
605 | ||
606 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
607 | { | |
608 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); | |
609 | } | |
610 | ||
611 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
612 | { | |
613 | return (proto ? proto : IPSEC_PROTO_ANY); | |
614 | } | |
615 | ||
9e8b4ed8 YH |
616 | static inline int pfkey_sockaddr_len(sa_family_t family) |
617 | { | |
618 | switch (family) { | |
619 | case AF_INET: | |
620 | return sizeof(struct sockaddr_in); | |
621 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
622 | case AF_INET6: | |
623 | return sizeof(struct sockaddr_in6); | |
624 | #endif | |
625 | } | |
626 | return 0; | |
627 | } | |
628 | ||
5f95ac91 YH |
629 | static |
630 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 631 | { |
5f95ac91 | 632 | switch (sa->sa_family) { |
1da177e4 | 633 | case AF_INET: |
8ff24541 | 634 | xaddr->a4 = |
5f95ac91 | 635 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 LT |
636 | return AF_INET; |
637 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
638 | case AF_INET6: | |
8ff24541 | 639 | memcpy(xaddr->a6, |
5f95ac91 | 640 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
641 | sizeof(struct in6_addr)); |
642 | return AF_INET6; | |
643 | #endif | |
1da177e4 | 644 | } |
5f95ac91 YH |
645 | return 0; |
646 | } | |
647 | ||
648 | static | |
649 | int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr) | |
650 | { | |
651 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
652 | xaddr); | |
1da177e4 LT |
653 | } |
654 | ||
07fb0f17 | 655 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, struct sadb_msg *hdr, void **ext_hdrs) |
1da177e4 LT |
656 | { |
657 | struct sadb_sa *sa; | |
658 | struct sadb_address *addr; | |
659 | uint16_t proto; | |
660 | unsigned short family; | |
661 | xfrm_address_t *xaddr; | |
662 | ||
663 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
664 | if (sa == NULL) | |
665 | return NULL; | |
666 | ||
667 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
668 | if (proto == 0) | |
669 | return NULL; | |
670 | ||
671 | /* sadb_address_len should be checked by caller */ | |
672 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
673 | if (addr == NULL) | |
674 | return NULL; | |
675 | ||
676 | family = ((struct sockaddr *)(addr + 1))->sa_family; | |
677 | switch (family) { | |
678 | case AF_INET: | |
679 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; | |
680 | break; | |
681 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
682 | case AF_INET6: | |
683 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; | |
684 | break; | |
685 | #endif | |
686 | default: | |
687 | xaddr = NULL; | |
688 | } | |
689 | ||
690 | if (!xaddr) | |
691 | return NULL; | |
692 | ||
07fb0f17 | 693 | return xfrm_state_lookup(net, xaddr, sa->sadb_sa_spi, proto, family); |
1da177e4 LT |
694 | } |
695 | ||
696 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 697 | |
1da177e4 LT |
698 | static int |
699 | pfkey_sockaddr_size(sa_family_t family) | |
700 | { | |
9e8b4ed8 | 701 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
702 | } |
703 | ||
55569ce2 KM |
704 | static inline int pfkey_mode_from_xfrm(int mode) |
705 | { | |
706 | switch(mode) { | |
707 | case XFRM_MODE_TRANSPORT: | |
708 | return IPSEC_MODE_TRANSPORT; | |
709 | case XFRM_MODE_TUNNEL: | |
710 | return IPSEC_MODE_TUNNEL; | |
711 | case XFRM_MODE_BEET: | |
712 | return IPSEC_MODE_BEET; | |
713 | default: | |
714 | return -1; | |
715 | } | |
716 | } | |
717 | ||
718 | static inline int pfkey_mode_to_xfrm(int mode) | |
719 | { | |
720 | switch(mode) { | |
721 | case IPSEC_MODE_ANY: /*XXX*/ | |
722 | case IPSEC_MODE_TRANSPORT: | |
723 | return XFRM_MODE_TRANSPORT; | |
724 | case IPSEC_MODE_TUNNEL: | |
725 | return XFRM_MODE_TUNNEL; | |
726 | case IPSEC_MODE_BEET: | |
727 | return XFRM_MODE_BEET; | |
728 | default: | |
729 | return -1; | |
730 | } | |
731 | } | |
732 | ||
e5b56652 YH |
733 | static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port, |
734 | struct sockaddr *sa, | |
735 | unsigned short family) | |
736 | { | |
737 | switch (family) { | |
738 | case AF_INET: | |
739 | { | |
740 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
741 | sin->sin_family = AF_INET; | |
742 | sin->sin_port = port; | |
743 | sin->sin_addr.s_addr = xaddr->a4; | |
744 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
745 | return 32; | |
746 | } | |
747 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
748 | case AF_INET6: | |
749 | { | |
750 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
751 | sin6->sin6_family = AF_INET6; | |
752 | sin6->sin6_port = port; | |
753 | sin6->sin6_flowinfo = 0; | |
754 | ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6); | |
755 | sin6->sin6_scope_id = 0; | |
756 | return 128; | |
757 | } | |
758 | #endif | |
759 | } | |
760 | return 0; | |
761 | } | |
762 | ||
050f009e HX |
763 | static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x, |
764 | int add_keys, int hsc) | |
1da177e4 LT |
765 | { |
766 | struct sk_buff *skb; | |
767 | struct sadb_msg *hdr; | |
768 | struct sadb_sa *sa; | |
769 | struct sadb_lifetime *lifetime; | |
770 | struct sadb_address *addr; | |
771 | struct sadb_key *key; | |
772 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
773 | struct sadb_x_sec_ctx *sec_ctx; |
774 | struct xfrm_sec_ctx *xfrm_ctx; | |
775 | int ctx_size = 0; | |
1da177e4 LT |
776 | int size; |
777 | int auth_key_size = 0; | |
778 | int encrypt_key_size = 0; | |
779 | int sockaddr_size; | |
780 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 781 | int mode; |
1da177e4 LT |
782 | |
783 | /* address family check */ | |
784 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
785 | if (!sockaddr_size) | |
786 | return ERR_PTR(-EINVAL); | |
787 | ||
788 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
789 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 790 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
791 | sizeof(struct sadb_lifetime) + |
792 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
793 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 794 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
795 | sockaddr_size*2 + |
796 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
797 | |
798 | if ((xfrm_ctx = x->security)) { | |
799 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
800 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
801 | } | |
802 | ||
1da177e4 | 803 | /* identity & sensitivity */ |
81b302a3 | 804 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
805 | size += sizeof(struct sadb_address) + sockaddr_size; |
806 | ||
807 | if (add_keys) { | |
808 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
809 | auth_key_size = |
810 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
811 | size += sizeof(struct sadb_key) + auth_key_size; |
812 | } | |
813 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
814 | encrypt_key_size = |
815 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
816 | size += sizeof(struct sadb_key) + encrypt_key_size; |
817 | } | |
818 | } | |
819 | if (x->encap) | |
820 | natt = x->encap; | |
821 | ||
822 | if (natt && natt->encap_type) { | |
823 | size += sizeof(struct sadb_x_nat_t_type); | |
824 | size += sizeof(struct sadb_x_nat_t_port); | |
825 | size += sizeof(struct sadb_x_nat_t_port); | |
826 | } | |
827 | ||
828 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
829 | if (skb == NULL) | |
830 | return ERR_PTR(-ENOBUFS); | |
831 | ||
832 | /* call should fill header later */ | |
833 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
834 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
835 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
836 | ||
837 | /* sa */ | |
838 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
839 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
840 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
841 | sa->sadb_sa_spi = x->id.spi; | |
842 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
843 | switch (x->km.state) { |
844 | case XFRM_STATE_VALID: | |
845 | sa->sadb_sa_state = x->km.dying ? | |
846 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
847 | break; | |
848 | case XFRM_STATE_ACQ: | |
1da177e4 | 849 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
850 | break; |
851 | default: | |
1da177e4 | 852 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
853 | break; |
854 | } | |
1da177e4 LT |
855 | sa->sadb_sa_auth = 0; |
856 | if (x->aalg) { | |
857 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
858 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | |
859 | } | |
860 | sa->sadb_sa_encrypt = 0; | |
861 | BUG_ON(x->ealg && x->calg); | |
862 | if (x->ealg) { | |
863 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
864 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
865 | } | |
866 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
867 | if (x->calg) { | |
868 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
869 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
870 | } | |
871 | ||
872 | sa->sadb_sa_flags = 0; | |
873 | if (x->props.flags & XFRM_STATE_NOECN) | |
874 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
875 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
876 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
877 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
878 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
879 | |
880 | /* hard time */ | |
881 | if (hsc & 2) { | |
8ff24541 | 882 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
883 | sizeof(struct sadb_lifetime)); |
884 | lifetime->sadb_lifetime_len = | |
885 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
886 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
887 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
888 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
889 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
890 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
891 | } | |
892 | /* soft time */ | |
893 | if (hsc & 1) { | |
8ff24541 | 894 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
895 | sizeof(struct sadb_lifetime)); |
896 | lifetime->sadb_lifetime_len = | |
897 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
898 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
899 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
900 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
901 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
902 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
903 | } | |
904 | /* current time */ | |
905 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
906 | sizeof(struct sadb_lifetime)); | |
907 | lifetime->sadb_lifetime_len = | |
908 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
909 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
910 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
911 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
912 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
913 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
914 | /* src address */ | |
8ff24541 | 915 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 916 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 917 | addr->sadb_address_len = |
1da177e4 LT |
918 | (sizeof(struct sadb_address)+sockaddr_size)/ |
919 | sizeof(uint64_t); | |
920 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
921 | /* "if the ports are non-zero, then the sadb_address_proto field, |
922 | normally zero, MUST be filled in with the transport | |
1da177e4 | 923 | protocol's number." - RFC2367 */ |
8ff24541 | 924 | addr->sadb_address_proto = 0; |
1da177e4 | 925 | addr->sadb_address_reserved = 0; |
1da177e4 | 926 | |
e5b56652 YH |
927 | addr->sadb_address_prefixlen = |
928 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
929 | (struct sockaddr *) (addr + 1), | |
930 | x->props.family); | |
931 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
932 | BUG(); |
933 | ||
934 | /* dst address */ | |
8ff24541 | 935 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 936 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 937 | addr->sadb_address_len = |
1da177e4 LT |
938 | (sizeof(struct sadb_address)+sockaddr_size)/ |
939 | sizeof(uint64_t); | |
940 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 941 | addr->sadb_address_proto = 0; |
1da177e4 | 942 | addr->sadb_address_reserved = 0; |
1da177e4 | 943 | |
e5b56652 YH |
944 | addr->sadb_address_prefixlen = |
945 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
946 | (struct sockaddr *) (addr + 1), | |
947 | x->props.family); | |
948 | if (!addr->sadb_address_prefixlen) | |
949 | BUG(); | |
1da177e4 | 950 | |
e5b56652 YH |
951 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, |
952 | x->props.family)) { | |
953 | addr = (struct sadb_address*) skb_put(skb, | |
954 | sizeof(struct sadb_address)+sockaddr_size); | |
955 | addr->sadb_address_len = | |
956 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
957 | sizeof(uint64_t); | |
958 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
959 | addr->sadb_address_proto = | |
960 | pfkey_proto_from_xfrm(x->sel.proto); | |
961 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
962 | addr->sadb_address_reserved = 0; | |
1da177e4 | 963 | |
e5b56652 YH |
964 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
965 | (struct sockaddr *) (addr + 1), | |
966 | x->props.family); | |
1da177e4 | 967 | } |
1da177e4 LT |
968 | |
969 | /* auth key */ | |
970 | if (add_keys && auth_key_size) { | |
8ff24541 | 971 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 LT |
972 | sizeof(struct sadb_key)+auth_key_size); |
973 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
974 | sizeof(uint64_t); | |
975 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
976 | key->sadb_key_bits = x->aalg->alg_key_len; | |
977 | key->sadb_key_reserved = 0; | |
978 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
979 | } | |
980 | /* encrypt key */ | |
981 | if (add_keys && encrypt_key_size) { | |
8ff24541 | 982 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 | 983 | sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541 | 984 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
985 | encrypt_key_size) / sizeof(uint64_t); |
986 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
987 | key->sadb_key_bits = x->ealg->alg_key_len; | |
988 | key->sadb_key_reserved = 0; | |
8ff24541 | 989 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
990 | (x->ealg->alg_key_len+7)/8); |
991 | } | |
992 | ||
993 | /* sa */ | |
994 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
995 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
996 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
997 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
998 | kfree_skb(skb); | |
999 | return ERR_PTR(-EINVAL); | |
1000 | } | |
1001 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
1002 | sa2->sadb_x_sa2_reserved1 = 0; |
1003 | sa2->sadb_x_sa2_reserved2 = 0; | |
1004 | sa2->sadb_x_sa2_sequence = 0; | |
1005 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
1006 | ||
1007 | if (natt && natt->encap_type) { | |
1008 | struct sadb_x_nat_t_type *n_type; | |
1009 | struct sadb_x_nat_t_port *n_port; | |
1010 | ||
1011 | /* type */ | |
1012 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
1013 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
1014 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
1015 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
1016 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
1017 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
1018 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
1019 | ||
1020 | /* source port */ | |
1021 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
1022 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
1023 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
1024 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
1025 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1026 | ||
1027 | /* dest port */ | |
1028 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
1029 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
1030 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
1031 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
1032 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1033 | } | |
1034 | ||
df71837d TJ |
1035 | /* security context */ |
1036 | if (xfrm_ctx) { | |
1037 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
1038 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
1039 | sec_ctx->sadb_x_sec_len = | |
1040 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1041 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1042 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1043 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1044 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1045 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1046 | xfrm_ctx->ctx_len); | |
1047 | } | |
1048 | ||
1da177e4 LT |
1049 | return skb; |
1050 | } | |
1051 | ||
050f009e HX |
1052 | |
1053 | static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x) | |
1054 | { | |
1055 | struct sk_buff *skb; | |
1056 | ||
050f009e | 1057 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1058 | |
1059 | return skb; | |
1060 | } | |
1061 | ||
1062 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x, | |
1063 | int hsc) | |
1064 | { | |
1065 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1066 | } | |
1067 | ||
07fb0f17 AD |
1068 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
1069 | struct sadb_msg *hdr, | |
1da177e4 LT |
1070 | void **ext_hdrs) |
1071 | { | |
8ff24541 | 1072 | struct xfrm_state *x; |
1da177e4 LT |
1073 | struct sadb_lifetime *lifetime; |
1074 | struct sadb_sa *sa; | |
1075 | struct sadb_key *key; | |
df71837d | 1076 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
1077 | uint16_t proto; |
1078 | int err; | |
8ff24541 | 1079 | |
1da177e4 LT |
1080 | |
1081 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
1082 | if (!sa || | |
1083 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1084 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1085 | return ERR_PTR(-EINVAL); | |
1086 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1087 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1088 | return ERR_PTR(-EINVAL); | |
1089 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1090 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1091 | return ERR_PTR(-EINVAL); | |
1092 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1093 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1094 | return ERR_PTR(-EINVAL); | |
1095 | ||
1096 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1097 | if (proto == 0) | |
1098 | return ERR_PTR(-EINVAL); | |
1099 | ||
1100 | /* default error is no buffer space */ | |
1101 | err = -ENOBUFS; | |
1102 | ||
1103 | /* RFC2367: | |
1104 | ||
1105 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1106 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1107 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1108 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1109 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1110 | not true. | |
1111 | ||
8ff24541 | 1112 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1113 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1114 | */ | |
1115 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1116 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1117 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1118 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1119 | return ERR_PTR(-EINVAL); | |
1120 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | |
1121 | if (key != NULL && | |
1122 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1123 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1124 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1125 | return ERR_PTR(-EINVAL); | |
1126 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1127 | if (key != NULL && | |
1128 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1129 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1130 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1131 | return ERR_PTR(-EINVAL); | |
1132 | ||
07fb0f17 | 1133 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1134 | if (x == NULL) |
1135 | return ERR_PTR(-ENOBUFS); | |
1136 | ||
1137 | x->id.proto = proto; | |
1138 | x->id.spi = sa->sadb_sa_spi; | |
1139 | x->props.replay_window = sa->sadb_sa_replay; | |
1140 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | |
1141 | x->props.flags |= XFRM_STATE_NOECN; | |
1142 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1143 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1144 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1145 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 LT |
1146 | |
1147 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; | |
1148 | if (lifetime != NULL) { | |
1149 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1150 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1151 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1152 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1153 | } | |
1154 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; | |
1155 | if (lifetime != NULL) { | |
1156 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1157 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1158 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1159 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1160 | } | |
df71837d TJ |
1161 | |
1162 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; | |
1163 | if (sec_ctx != NULL) { | |
1164 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
1165 | ||
1166 | if (!uctx) | |
1167 | goto out; | |
1168 | ||
1169 | err = security_xfrm_state_alloc(x, uctx); | |
1170 | kfree(uctx); | |
1171 | ||
1172 | if (err) | |
1173 | goto out; | |
1174 | } | |
1175 | ||
1da177e4 LT |
1176 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1177 | if (sa->sadb_sa_auth) { | |
1178 | int keysize = 0; | |
1179 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
1180 | if (!a) { | |
1181 | err = -ENOSYS; | |
1182 | goto out; | |
1183 | } | |
1184 | if (key) | |
1185 | keysize = (key->sadb_key_bits + 7) / 8; | |
1186 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1187 | if (!x->aalg) | |
1188 | goto out; | |
1189 | strcpy(x->aalg->alg_name, a->name); | |
1190 | x->aalg->alg_key_len = 0; | |
1191 | if (key) { | |
1192 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1193 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1194 | } | |
1195 | x->props.aalgo = sa->sadb_sa_auth; | |
1196 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1197 | } | |
1198 | if (sa->sadb_sa_encrypt) { | |
1199 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1200 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
1201 | if (!a) { | |
1202 | err = -ENOSYS; | |
1203 | goto out; | |
1204 | } | |
1205 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1206 | if (!x->calg) | |
1207 | goto out; | |
1208 | strcpy(x->calg->alg_name, a->name); | |
1209 | x->props.calgo = sa->sadb_sa_encrypt; | |
1210 | } else { | |
1211 | int keysize = 0; | |
1212 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
1213 | if (!a) { | |
1214 | err = -ENOSYS; | |
1215 | goto out; | |
1216 | } | |
1217 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1218 | if (key) | |
1219 | keysize = (key->sadb_key_bits + 7) / 8; | |
1220 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1221 | if (!x->ealg) | |
1222 | goto out; | |
1223 | strcpy(x->ealg->alg_name, a->name); | |
1224 | x->ealg->alg_key_len = 0; | |
1225 | if (key) { | |
1226 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1227 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1228 | } | |
1229 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1230 | } | |
1231 | } | |
1232 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1233 | ||
8ff24541 | 1234 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
1235 | &x->props.saddr); |
1236 | if (!x->props.family) { | |
1237 | err = -EAFNOSUPPORT; | |
1238 | goto out; | |
1239 | } | |
8ff24541 | 1240 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1241 | &x->id.daddr); |
1242 | ||
1243 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
1244 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; | |
55569ce2 KM |
1245 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1246 | if (mode < 0) { | |
1247 | err = -EINVAL; | |
1248 | goto out; | |
1249 | } | |
1250 | x->props.mode = mode; | |
1da177e4 LT |
1251 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1252 | } | |
1253 | ||
1254 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
1255 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; | |
1256 | ||
1257 | /* Nobody uses this, but we try. */ | |
1258 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1259 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1260 | } | |
1261 | ||
4da51056 | 1262 | if (!x->sel.family) |
4a4b6271 JL |
1263 | x->sel.family = x->props.family; |
1264 | ||
1da177e4 LT |
1265 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
1266 | struct sadb_x_nat_t_type* n_type; | |
1267 | struct xfrm_encap_tmpl *natt; | |
1268 | ||
1269 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1270 | if (!x->encap) | |
1271 | goto out; | |
1272 | ||
1273 | natt = x->encap; | |
1274 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1275 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1276 | ||
1277 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
1278 | struct sadb_x_nat_t_port* n_port = | |
1279 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; | |
1280 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1281 | } | |
1282 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
1283 | struct sadb_x_nat_t_port* n_port = | |
1284 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; | |
1285 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1286 | } | |
a8d694c6 | 1287 | memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1da177e4 LT |
1288 | } |
1289 | ||
72cb6962 HX |
1290 | err = xfrm_init_state(x); |
1291 | if (err) | |
1da177e4 | 1292 | goto out; |
72cb6962 | 1293 | |
1da177e4 | 1294 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1295 | return x; |
1296 | ||
1297 | out: | |
1298 | x->km.state = XFRM_STATE_DEAD; | |
1299 | xfrm_state_put(x); | |
1300 | return ERR_PTR(err); | |
1301 | } | |
1302 | ||
1303 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1304 | { | |
1305 | return -EOPNOTSUPP; | |
1306 | } | |
1307 | ||
1308 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1309 | { | |
07fb0f17 | 1310 | struct net *net = sock_net(sk); |
1da177e4 LT |
1311 | struct sk_buff *resp_skb; |
1312 | struct sadb_x_sa2 *sa2; | |
1313 | struct sadb_address *saddr, *daddr; | |
1314 | struct sadb_msg *out_hdr; | |
658b219e | 1315 | struct sadb_spirange *range; |
1da177e4 | 1316 | struct xfrm_state *x = NULL; |
55569ce2 | 1317 | int mode; |
658b219e HX |
1318 | int err; |
1319 | u32 min_spi, max_spi; | |
1da177e4 LT |
1320 | u32 reqid; |
1321 | u8 proto; | |
1322 | unsigned short family; | |
1323 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1324 | ||
1325 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1326 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1327 | return -EINVAL; | |
1328 | ||
1329 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1330 | if (proto == 0) | |
1331 | return -EINVAL; | |
1332 | ||
1333 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1334 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1335 | if (mode < 0) | |
1336 | return -EINVAL; | |
1da177e4 LT |
1337 | reqid = sa2->sadb_x_sa2_reqid; |
1338 | } else { | |
1339 | mode = 0; | |
1340 | reqid = 0; | |
1341 | } | |
1342 | ||
1343 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1344 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1345 | ||
1346 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1347 | switch (family) { | |
1348 | case AF_INET: | |
1349 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1350 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1351 | break; | |
1352 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1353 | case AF_INET6: | |
1354 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1355 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1356 | break; | |
1357 | #endif | |
1358 | } | |
1359 | ||
1360 | if (hdr->sadb_msg_seq) { | |
07fb0f17 | 1361 | x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq); |
1da177e4 LT |
1362 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { |
1363 | xfrm_state_put(x); | |
1364 | x = NULL; | |
1365 | } | |
1366 | } | |
1367 | ||
1368 | if (!x) | |
07fb0f17 | 1369 | x = xfrm_find_acq(net, mode, reqid, proto, xdaddr, xsaddr, 1, family); |
1da177e4 LT |
1370 | |
1371 | if (x == NULL) | |
1372 | return -ENOENT; | |
1373 | ||
658b219e HX |
1374 | min_spi = 0x100; |
1375 | max_spi = 0x0fffffff; | |
1da177e4 | 1376 | |
658b219e HX |
1377 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1378 | if (range) { | |
1379 | min_spi = range->sadb_spirange_min; | |
1380 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1381 | } |
658b219e HX |
1382 | |
1383 | err = xfrm_alloc_spi(x, min_spi, max_spi); | |
050f009e | 1384 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1385 | |
1386 | if (IS_ERR(resp_skb)) { | |
1387 | xfrm_state_put(x); | |
1388 | return PTR_ERR(resp_skb); | |
1389 | } | |
1390 | ||
1391 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1392 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1393 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1394 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1395 | out_hdr->sadb_msg_errno = 0; | |
1396 | out_hdr->sadb_msg_reserved = 0; | |
1397 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1398 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1399 | ||
1400 | xfrm_state_put(x); | |
1401 | ||
07fb0f17 | 1402 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4 LT |
1403 | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1408 | { | |
07fb0f17 | 1409 | struct net *net = sock_net(sk); |
1da177e4 LT |
1410 | struct xfrm_state *x; |
1411 | ||
1412 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1413 | return -EOPNOTSUPP; | |
1414 | ||
1415 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1416 | return 0; | |
1417 | ||
07fb0f17 | 1418 | x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq); |
1da177e4 LT |
1419 | if (x == NULL) |
1420 | return 0; | |
1421 | ||
1422 | spin_lock_bh(&x->lock); | |
1423 | if (x->km.state == XFRM_STATE_ACQ) { | |
1424 | x->km.state = XFRM_STATE_ERROR; | |
07fb0f17 | 1425 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
1426 | } |
1427 | spin_unlock_bh(&x->lock); | |
1428 | xfrm_state_put(x); | |
1429 | return 0; | |
1430 | } | |
1431 | ||
26b15dad JHS |
1432 | static inline int event2poltype(int event) |
1433 | { | |
1434 | switch (event) { | |
f60f6b8f | 1435 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1436 | return SADB_X_SPDDELETE; |
f60f6b8f | 1437 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1438 | return SADB_X_SPDADD; |
f60f6b8f | 1439 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1440 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1441 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1442 | // return SADB_X_SPDEXPIRE; |
1443 | default: | |
1444 | printk("pfkey: Unknown policy event %d\n", event); | |
1445 | break; | |
1446 | } | |
1447 | ||
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | static inline int event2keytype(int event) | |
1452 | { | |
1453 | switch (event) { | |
f60f6b8f | 1454 | case XFRM_MSG_DELSA: |
26b15dad | 1455 | return SADB_DELETE; |
f60f6b8f | 1456 | case XFRM_MSG_NEWSA: |
26b15dad | 1457 | return SADB_ADD; |
f60f6b8f | 1458 | case XFRM_MSG_UPDSA: |
26b15dad | 1459 | return SADB_UPDATE; |
f60f6b8f | 1460 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1461 | return SADB_EXPIRE; |
1462 | default: | |
1463 | printk("pfkey: Unknown SA event %d\n", event); | |
1464 | break; | |
1465 | } | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | /* ADD/UPD/DEL */ | |
1471 | static int key_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1472 | { | |
1473 | struct sk_buff *skb; | |
1474 | struct sadb_msg *hdr; | |
26b15dad | 1475 | |
050f009e | 1476 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1477 | |
1478 | if (IS_ERR(skb)) | |
1479 | return PTR_ERR(skb); | |
1480 | ||
1481 | hdr = (struct sadb_msg *) skb->data; | |
1482 | hdr->sadb_msg_version = PF_KEY_V2; | |
1483 | hdr->sadb_msg_type = event2keytype(c->event); | |
1484 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1485 | hdr->sadb_msg_errno = 0; | |
1486 | hdr->sadb_msg_reserved = 0; | |
1487 | hdr->sadb_msg_seq = c->seq; | |
1488 | hdr->sadb_msg_pid = c->pid; | |
1489 | ||
07fb0f17 | 1490 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad JHS |
1491 | |
1492 | return 0; | |
1493 | } | |
1da177e4 LT |
1494 | |
1495 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1496 | { | |
07fb0f17 | 1497 | struct net *net = sock_net(sk); |
1da177e4 LT |
1498 | struct xfrm_state *x; |
1499 | int err; | |
26b15dad | 1500 | struct km_event c; |
1da177e4 | 1501 | |
07fb0f17 | 1502 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4 LT |
1503 | if (IS_ERR(x)) |
1504 | return PTR_ERR(x); | |
1505 | ||
26b15dad | 1506 | xfrm_state_hold(x); |
1da177e4 LT |
1507 | if (hdr->sadb_msg_type == SADB_ADD) |
1508 | err = xfrm_state_add(x); | |
1509 | else | |
1510 | err = xfrm_state_update(x); | |
1511 | ||
ab5f5e8b | 1512 | xfrm_audit_state_add(x, err ? 0 : 1, |
2532386f EP |
1513 | audit_get_loginuid(current), |
1514 | audit_get_sessionid(current), 0); | |
161a09e7 | 1515 | |
1da177e4 LT |
1516 | if (err < 0) { |
1517 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1518 | __xfrm_state_put(x); |
7d6dfe1f | 1519 | goto out; |
1da177e4 LT |
1520 | } |
1521 | ||
26b15dad | 1522 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1523 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1524 | else |
f60f6b8f | 1525 | c.event = XFRM_MSG_UPDSA; |
26b15dad JHS |
1526 | c.seq = hdr->sadb_msg_seq; |
1527 | c.pid = hdr->sadb_msg_pid; | |
1528 | km_state_notify(x, &c); | |
7d6dfe1f | 1529 | out: |
26b15dad | 1530 | xfrm_state_put(x); |
26b15dad | 1531 | return err; |
1da177e4 LT |
1532 | } |
1533 | ||
1534 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1535 | { | |
07fb0f17 | 1536 | struct net *net = sock_net(sk); |
1da177e4 | 1537 | struct xfrm_state *x; |
26b15dad JHS |
1538 | struct km_event c; |
1539 | int err; | |
1da177e4 LT |
1540 | |
1541 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1542 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1543 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1544 | return -EINVAL; | |
1545 | ||
07fb0f17 | 1546 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1547 | if (x == NULL) |
1548 | return -ESRCH; | |
1549 | ||
c8c05a8e CZ |
1550 | if ((err = security_xfrm_state_delete(x))) |
1551 | goto out; | |
1552 | ||
1da177e4 | 1553 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1554 | err = -EPERM; |
1555 | goto out; | |
1da177e4 | 1556 | } |
161a09e7 | 1557 | |
26b15dad | 1558 | err = xfrm_state_delete(x); |
161a09e7 | 1559 | |
c8c05a8e CZ |
1560 | if (err < 0) |
1561 | goto out; | |
1da177e4 | 1562 | |
26b15dad JHS |
1563 | c.seq = hdr->sadb_msg_seq; |
1564 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1565 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1566 | km_state_notify(x, &c); |
c8c05a8e | 1567 | out: |
ab5f5e8b | 1568 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
1569 | audit_get_loginuid(current), |
1570 | audit_get_sessionid(current), 0); | |
26b15dad | 1571 | xfrm_state_put(x); |
1da177e4 | 1572 | |
26b15dad | 1573 | return err; |
1da177e4 LT |
1574 | } |
1575 | ||
1576 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1577 | { | |
07fb0f17 | 1578 | struct net *net = sock_net(sk); |
1da177e4 LT |
1579 | __u8 proto; |
1580 | struct sk_buff *out_skb; | |
1581 | struct sadb_msg *out_hdr; | |
1582 | struct xfrm_state *x; | |
1583 | ||
1584 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1585 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1586 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1587 | return -EINVAL; | |
1588 | ||
07fb0f17 | 1589 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1590 | if (x == NULL) |
1591 | return -ESRCH; | |
1592 | ||
050f009e | 1593 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1594 | proto = x->id.proto; |
1595 | xfrm_state_put(x); | |
1596 | if (IS_ERR(out_skb)) | |
1597 | return PTR_ERR(out_skb); | |
1598 | ||
1599 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1600 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1601 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1602 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1603 | out_hdr->sadb_msg_errno = 0; | |
1604 | out_hdr->sadb_msg_reserved = 0; | |
1605 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1606 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
07fb0f17 | 1607 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
1608 | |
1609 | return 0; | |
1610 | } | |
1611 | ||
00fa0233 | 1612 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, |
dd0fc66f | 1613 | gfp_t allocation) |
1da177e4 LT |
1614 | { |
1615 | struct sk_buff *skb; | |
1616 | struct sadb_msg *hdr; | |
1617 | int len, auth_len, enc_len, i; | |
1618 | ||
1619 | auth_len = xfrm_count_auth_supported(); | |
1620 | if (auth_len) { | |
1621 | auth_len *= sizeof(struct sadb_alg); | |
1622 | auth_len += sizeof(struct sadb_supported); | |
1623 | } | |
8ff24541 | 1624 | |
1da177e4 LT |
1625 | enc_len = xfrm_count_enc_supported(); |
1626 | if (enc_len) { | |
1627 | enc_len *= sizeof(struct sadb_alg); | |
1628 | enc_len += sizeof(struct sadb_supported); | |
1629 | } | |
8ff24541 | 1630 | |
1da177e4 LT |
1631 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1632 | ||
1633 | skb = alloc_skb(len + 16, allocation); | |
1634 | if (!skb) | |
1635 | goto out_put_algs; | |
1636 | ||
1637 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1638 | pfkey_hdr_dup(hdr, orig); | |
1639 | hdr->sadb_msg_errno = 0; | |
1640 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1641 | ||
1642 | if (auth_len) { | |
1643 | struct sadb_supported *sp; | |
1644 | struct sadb_alg *ap; | |
1645 | ||
1646 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1647 | ap = (struct sadb_alg *) (sp + 1); | |
1648 | ||
1649 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1650 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1651 | ||
1652 | for (i = 0; ; i++) { | |
1653 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1654 | if (!aalg) | |
1655 | break; | |
1656 | if (aalg->available) | |
1657 | *ap++ = aalg->desc; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | if (enc_len) { | |
1662 | struct sadb_supported *sp; | |
1663 | struct sadb_alg *ap; | |
1664 | ||
1665 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1666 | ap = (struct sadb_alg *) (sp + 1); | |
1667 | ||
1668 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1669 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1670 | ||
1671 | for (i = 0; ; i++) { | |
1672 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1673 | if (!ealg) | |
1674 | break; | |
1675 | if (ealg->available) | |
1676 | *ap++ = ealg->desc; | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | out_put_algs: | |
1681 | return skb; | |
1682 | } | |
1683 | ||
1684 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1685 | { | |
1686 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1687 | struct sk_buff *supp_skb; | |
1688 | ||
1689 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1690 | return -EINVAL; | |
1691 | ||
1692 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1693 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1694 | return -EEXIST; | |
1695 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1696 | } | |
1697 | ||
1698 | xfrm_probe_algs(); | |
8ff24541 | 1699 | |
1da177e4 LT |
1700 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1701 | if (!supp_skb) { | |
1702 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1703 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1704 | ||
1705 | return -ENOBUFS; | |
1706 | } | |
1707 | ||
07fb0f17 | 1708 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk)); |
1da177e4 LT |
1709 | |
1710 | return 0; | |
1711 | } | |
1712 | ||
26b15dad JHS |
1713 | static int key_notify_sa_flush(struct km_event *c) |
1714 | { | |
1715 | struct sk_buff *skb; | |
1716 | struct sadb_msg *hdr; | |
1717 | ||
1718 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1719 | if (!skb) | |
1720 | return -ENOBUFS; | |
1721 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1722 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1723 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad JHS |
1724 | hdr->sadb_msg_seq = c->seq; |
1725 | hdr->sadb_msg_pid = c->pid; | |
1726 | hdr->sadb_msg_version = PF_KEY_V2; | |
1727 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1728 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1729 | ||
07fb0f17 | 1730 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad JHS |
1731 | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1da177e4 LT |
1735 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1736 | { | |
07fb0f17 | 1737 | struct net *net = sock_net(sk); |
1da177e4 | 1738 | unsigned proto; |
26b15dad | 1739 | struct km_event c; |
161a09e7 | 1740 | struct xfrm_audit audit_info; |
4aa2e62c | 1741 | int err; |
1da177e4 LT |
1742 | |
1743 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1744 | if (proto == 0) | |
1745 | return -EINVAL; | |
1746 | ||
0c11b942 | 1747 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 1748 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 1749 | audit_info.secid = 0; |
07fb0f17 | 1750 | err = xfrm_state_flush(net, proto, &audit_info); |
4aa2e62c JL |
1751 | if (err) |
1752 | return err; | |
bf08867f | 1753 | c.data.proto = proto; |
26b15dad JHS |
1754 | c.seq = hdr->sadb_msg_seq; |
1755 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1756 | c.event = XFRM_MSG_FLUSHSA; |
07fb0f17 | 1757 | c.net = net; |
26b15dad | 1758 | km_state_notify(NULL, &c); |
1da177e4 LT |
1759 | |
1760 | return 0; | |
1761 | } | |
1762 | ||
1da177e4 LT |
1763 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1764 | { | |
83321d6b | 1765 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1766 | struct sk_buff *out_skb; |
1767 | struct sadb_msg *out_hdr; | |
1768 | ||
83321d6b TT |
1769 | if (!pfkey_can_dump(&pfk->sk)) |
1770 | return -ENOBUFS; | |
1771 | ||
050f009e | 1772 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1773 | if (IS_ERR(out_skb)) |
1774 | return PTR_ERR(out_skb); | |
1775 | ||
1776 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1777 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1778 | out_hdr->sadb_msg_type = SADB_DUMP; |
1779 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1780 | out_hdr->sadb_msg_errno = 0; | |
1781 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1782 | out_hdr->sadb_msg_seq = count + 1; |
83321d6b | 1783 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
12a169e7 HX |
1784 | |
1785 | if (pfk->dump.skb) | |
1786 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 1787 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
1788 | pfk->dump.skb = out_skb; |
1789 | ||
1da177e4 LT |
1790 | return 0; |
1791 | } | |
1792 | ||
83321d6b TT |
1793 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1794 | { | |
07fb0f17 AD |
1795 | struct net *net = sock_net(&pfk->sk); |
1796 | return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); | |
83321d6b TT |
1797 | } |
1798 | ||
1799 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1800 | { | |
1801 | xfrm_state_walk_done(&pfk->dump.u.state); | |
1802 | } | |
1803 | ||
1da177e4 LT |
1804 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1805 | { | |
1806 | u8 proto; | |
83321d6b TT |
1807 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1808 | ||
1809 | if (pfk->dump.dump != NULL) | |
1810 | return -EBUSY; | |
1da177e4 LT |
1811 | |
1812 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1813 | if (proto == 0) | |
1814 | return -EINVAL; | |
1815 | ||
83321d6b TT |
1816 | pfk->dump.msg_version = hdr->sadb_msg_version; |
1817 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
1818 | pfk->dump.dump = pfkey_dump_sa; | |
1819 | pfk->dump.done = pfkey_dump_sa_done; | |
1820 | xfrm_state_walk_init(&pfk->dump.u.state, proto); | |
4c563f76 | 1821 | |
83321d6b | 1822 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1823 | } |
1824 | ||
1825 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1826 | { | |
1827 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1828 | int satype = hdr->sadb_msg_satype; | |
1829 | ||
1830 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
1831 | /* XXX we mangle packet... */ | |
1832 | hdr->sadb_msg_errno = 0; | |
1833 | if (satype != 0 && satype != 1) | |
1834 | return -EINVAL; | |
1835 | pfk->promisc = satype; | |
1836 | } | |
07fb0f17 | 1837 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk)); |
1da177e4 LT |
1838 | return 0; |
1839 | } | |
1840 | ||
1841 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1842 | { | |
1843 | int i; | |
1844 | u32 reqid = *(u32*)ptr; | |
1845 | ||
1846 | for (i=0; i<xp->xfrm_nr; i++) { | |
1847 | if (xp->xfrm_vec[i].reqid == reqid) | |
1848 | return -EEXIST; | |
1849 | } | |
1850 | return 0; | |
1851 | } | |
1852 | ||
07fb0f17 | 1853 | static u32 gen_reqid(struct net *net) |
1da177e4 | 1854 | { |
4c563f76 | 1855 | struct xfrm_policy_walk walk; |
1da177e4 | 1856 | u32 start; |
4c563f76 | 1857 | int rc; |
1da177e4 LT |
1858 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1859 | ||
1860 | start = reqid; | |
1861 | do { | |
1862 | ++reqid; | |
1863 | if (reqid == 0) | |
1864 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 | 1865 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f17 | 1866 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
4c563f76 TT |
1867 | xfrm_policy_walk_done(&walk); |
1868 | if (rc != -EEXIST) | |
1da177e4 LT |
1869 | return reqid; |
1870 | } while (reqid != start); | |
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | static int | |
1875 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1876 | { | |
07fb0f17 | 1877 | struct net *net = xp_net(xp); |
1da177e4 | 1878 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce2 | 1879 | int mode; |
1da177e4 LT |
1880 | |
1881 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1882 | return -ELOOP; | |
1883 | ||
1884 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1885 | return -EINVAL; | |
1886 | ||
1887 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1888 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1889 | return -EINVAL; | |
1890 | t->mode = mode; | |
1da177e4 LT |
1891 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1892 | t->optional = 1; | |
1893 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1894 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1895 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1896 | t->reqid = 0; | |
07fb0f17 | 1897 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4 LT |
1898 | return -ENOBUFS; |
1899 | } | |
1900 | ||
1901 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1902 | if (t->mode == XFRM_MODE_TUNNEL) { |
5f95ac91 YH |
1903 | u8 *sa = (u8 *) (rq + 1); |
1904 | int family, socklen; | |
1905 | ||
1906 | family = pfkey_sockaddr_extract((struct sockaddr *)sa, | |
1907 | &t->saddr); | |
1908 | if (!family) | |
1da177e4 | 1909 | return -EINVAL; |
5f95ac91 YH |
1910 | |
1911 | socklen = pfkey_sockaddr_len(family); | |
1912 | if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), | |
1913 | &t->id.daddr) != family) | |
1914 | return -EINVAL; | |
1915 | t->encap_family = family; | |
2718aa7c MK |
1916 | } else |
1917 | t->encap_family = xp->family; | |
1918 | ||
1da177e4 | 1919 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1920 | t->allalgs = 1; |
1da177e4 LT |
1921 | xp->xfrm_nr++; |
1922 | return 0; | |
1923 | } | |
1924 | ||
1925 | static int | |
1926 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1927 | { | |
1928 | int err; | |
1929 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1930 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1931 | ||
1932 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | |
1933 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1934 | return err; | |
1935 | len -= rq->sadb_x_ipsecrequest_len; | |
1936 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1937 | } | |
1938 | return 0; | |
1939 | } | |
1940 | ||
df71837d TJ |
1941 | static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) |
1942 | { | |
1943 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1944 | ||
1945 | if (xfrm_ctx) { | |
1946 | int len = sizeof(struct sadb_x_sec_ctx); | |
1947 | len += xfrm_ctx->ctx_len; | |
1948 | return PFKEY_ALIGN8(len); | |
1949 | } | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1da177e4 LT |
1953 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) |
1954 | { | |
2718aa7c | 1955 | struct xfrm_tmpl *t; |
1da177e4 | 1956 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
1957 | int socklen = 0; |
1958 | int i; | |
1959 | ||
1960 | for (i=0; i<xp->xfrm_nr; i++) { | |
1961 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 1962 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 1963 | } |
1da177e4 LT |
1964 | |
1965 | return sizeof(struct sadb_msg) + | |
1966 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 1967 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
1968 | (sockaddr_size * 2) + |
1969 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
1970 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1971 | (socklen * 2) + | |
df71837d | 1972 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
1973 | } |
1974 | ||
1975 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) | |
1976 | { | |
1977 | struct sk_buff *skb; | |
1978 | int size; | |
1979 | ||
1980 | size = pfkey_xfrm_policy2msg_size(xp); | |
1981 | ||
1982 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
1983 | if (skb == NULL) | |
1984 | return ERR_PTR(-ENOBUFS); | |
1985 | ||
1986 | return skb; | |
1987 | } | |
1988 | ||
55569ce2 | 1989 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) |
1da177e4 LT |
1990 | { |
1991 | struct sadb_msg *hdr; | |
1992 | struct sadb_address *addr; | |
1993 | struct sadb_lifetime *lifetime; | |
1994 | struct sadb_x_policy *pol; | |
df71837d TJ |
1995 | struct sadb_x_sec_ctx *sec_ctx; |
1996 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
1997 | int i; |
1998 | int size; | |
1999 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 2000 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
2001 | |
2002 | size = pfkey_xfrm_policy2msg_size(xp); | |
2003 | ||
2004 | /* call should fill header later */ | |
2005 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
2006 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
2007 | ||
2008 | /* src address */ | |
8ff24541 | 2009 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 2010 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 2011 | addr->sadb_address_len = |
1da177e4 LT |
2012 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2013 | sizeof(uint64_t); | |
2014 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2015 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
2016 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
2017 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2018 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2019 | xp->selector.sport, | |
2020 | (struct sockaddr *) (addr + 1), | |
2021 | xp->family)) | |
1da177e4 LT |
2022 | BUG(); |
2023 | ||
2024 | /* dst address */ | |
8ff24541 | 2025 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
2026 | sizeof(struct sadb_address)+sockaddr_size); |
2027 | addr->sadb_address_len = | |
2028 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2029 | sizeof(uint64_t); | |
2030 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2031 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2032 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2033 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2034 | |
2035 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2036 | (struct sockaddr *) (addr + 1), | |
2037 | xp->family); | |
1da177e4 LT |
2038 | |
2039 | /* hard time */ | |
8ff24541 | 2040 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2041 | sizeof(struct sadb_lifetime)); |
2042 | lifetime->sadb_lifetime_len = | |
2043 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2044 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2045 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2046 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2047 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2048 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2049 | /* soft time */ | |
8ff24541 | 2050 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2051 | sizeof(struct sadb_lifetime)); |
2052 | lifetime->sadb_lifetime_len = | |
2053 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2054 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2055 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2056 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2057 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2058 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2059 | /* current time */ | |
8ff24541 | 2060 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2061 | sizeof(struct sadb_lifetime)); |
2062 | lifetime->sadb_lifetime_len = | |
2063 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2064 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2065 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2066 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2067 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2068 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2069 | ||
2070 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2071 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2072 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2073 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2074 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2075 | if (xp->xfrm_nr) | |
2076 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2077 | else | |
2078 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2079 | } | |
2080 | pol->sadb_x_policy_dir = dir+1; | |
2081 | pol->sadb_x_policy_id = xp->index; | |
2082 | pol->sadb_x_policy_priority = xp->priority; | |
2083 | ||
2084 | for (i=0; i<xp->xfrm_nr; i++) { | |
2085 | struct sadb_x_ipsecrequest *rq; | |
2086 | struct xfrm_tmpl *t = xp->xfrm_vec + i; | |
2087 | int req_size; | |
55569ce2 | 2088 | int mode; |
1da177e4 LT |
2089 | |
2090 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2091 | if (t->mode == XFRM_MODE_TUNNEL) { |
2092 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2093 | req_size += socklen * 2; | |
2094 | } else { | |
1da177e4 | 2095 | size -= 2*socklen; |
e5b56652 | 2096 | } |
1da177e4 LT |
2097 | rq = (void*)skb_put(skb, req_size); |
2098 | pol->sadb_x_policy_len += req_size/8; | |
2099 | memset(rq, 0, sizeof(*rq)); | |
2100 | rq->sadb_x_ipsecrequest_len = req_size; | |
2101 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2102 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2103 | return -EINVAL; | |
fefaa75e | 2104 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2105 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2106 | if (t->reqid) | |
2107 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2108 | if (t->optional) | |
2109 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2110 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2111 | |
7e49e6de | 2112 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2113 | u8 *sa = (void *)(rq + 1); |
2114 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2115 | (struct sockaddr *)sa, | |
2116 | t->encap_family); | |
2117 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2118 | (struct sockaddr *) (sa + socklen), | |
2119 | t->encap_family); | |
1da177e4 LT |
2120 | } |
2121 | } | |
df71837d TJ |
2122 | |
2123 | /* security context */ | |
2124 | if ((xfrm_ctx = xp->security)) { | |
2125 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2126 | ||
2127 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2128 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2129 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2130 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2131 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2132 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2133 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2134 | xfrm_ctx->ctx_len); | |
2135 | } | |
2136 | ||
1da177e4 LT |
2137 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2138 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
55569ce2 KM |
2139 | |
2140 | return 0; | |
1da177e4 LT |
2141 | } |
2142 | ||
26b15dad JHS |
2143 | static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2144 | { | |
2145 | struct sk_buff *out_skb; | |
2146 | struct sadb_msg *out_hdr; | |
2147 | int err; | |
2148 | ||
2149 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2150 | if (IS_ERR(out_skb)) { | |
2151 | err = PTR_ERR(out_skb); | |
2152 | goto out; | |
2153 | } | |
55569ce2 KM |
2154 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2155 | if (err < 0) | |
2156 | return err; | |
26b15dad JHS |
2157 | |
2158 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2159 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2160 | ||
f60f6b8f | 2161 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2162 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2163 | else | |
2164 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2165 | out_hdr->sadb_msg_errno = 0; | |
2166 | out_hdr->sadb_msg_seq = c->seq; | |
2167 | out_hdr->sadb_msg_pid = c->pid; | |
07fb0f17 | 2168 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad JHS |
2169 | out: |
2170 | return 0; | |
2171 | ||
2172 | } | |
2173 | ||
1da177e4 LT |
2174 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2175 | { | |
07fb0f17 | 2176 | struct net *net = sock_net(sk); |
df71837d | 2177 | int err = 0; |
1da177e4 LT |
2178 | struct sadb_lifetime *lifetime; |
2179 | struct sadb_address *sa; | |
2180 | struct sadb_x_policy *pol; | |
2181 | struct xfrm_policy *xp; | |
26b15dad | 2182 | struct km_event c; |
df71837d | 2183 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2184 | |
2185 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2186 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2187 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2188 | return -EINVAL; | |
2189 | ||
2190 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2191 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2192 | return -EINVAL; | |
2193 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2194 | return -EINVAL; | |
2195 | ||
07fb0f17 | 2196 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2197 | if (xp == NULL) |
2198 | return -ENOBUFS; | |
2199 | ||
2200 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2201 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2202 | xp->priority = pol->sadb_x_policy_priority; | |
2203 | ||
8ff24541 | 2204 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2205 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
2206 | if (!xp->family) { | |
2207 | err = -EINVAL; | |
2208 | goto out; | |
2209 | } | |
2210 | xp->selector.family = xp->family; | |
2211 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2212 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2213 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2214 | if (xp->selector.sport) | |
8f83f23e | 2215 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2216 | |
8ff24541 | 2217 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2218 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2219 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2220 | ||
2221 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2222 | * in both addresses. | |
2223 | */ | |
2224 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2225 | ||
2226 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2227 | if (xp->selector.dport) | |
8f83f23e | 2228 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2229 | |
df71837d TJ |
2230 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2231 | if (sec_ctx != NULL) { | |
2232 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2233 | ||
2234 | if (!uctx) { | |
2235 | err = -ENOBUFS; | |
2236 | goto out; | |
2237 | } | |
2238 | ||
03e1ad7b | 2239 | err = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
2240 | kfree(uctx); |
2241 | ||
2242 | if (err) | |
2243 | goto out; | |
2244 | } | |
2245 | ||
1da177e4 LT |
2246 | xp->lft.soft_byte_limit = XFRM_INF; |
2247 | xp->lft.hard_byte_limit = XFRM_INF; | |
2248 | xp->lft.soft_packet_limit = XFRM_INF; | |
2249 | xp->lft.hard_packet_limit = XFRM_INF; | |
2250 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2251 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2252 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2253 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2254 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2255 | } | |
2256 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2257 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2258 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2259 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2260 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2261 | } | |
2262 | xp->xfrm_nr = 0; | |
2263 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2264 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2265 | goto out; | |
2266 | ||
1da177e4 LT |
2267 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2268 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2269 | |
ab5f5e8b | 2270 | xfrm_audit_policy_add(xp, err ? 0 : 1, |
2532386f EP |
2271 | audit_get_loginuid(current), |
2272 | audit_get_sessionid(current), 0); | |
161a09e7 | 2273 | |
df71837d TJ |
2274 | if (err) |
2275 | goto out; | |
1da177e4 | 2276 | |
26b15dad | 2277 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2278 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2279 | else |
f60f6b8f | 2280 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2281 | |
26b15dad JHS |
2282 | c.seq = hdr->sadb_msg_seq; |
2283 | c.pid = hdr->sadb_msg_pid; | |
1da177e4 | 2284 | |
26b15dad JHS |
2285 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2286 | xfrm_pol_put(xp); | |
1da177e4 LT |
2287 | return 0; |
2288 | ||
2289 | out: | |
12a169e7 | 2290 | xp->walk.dead = 1; |
64c31b3f | 2291 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2292 | return err; |
2293 | } | |
2294 | ||
2295 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2296 | { | |
07fb0f17 | 2297 | struct net *net = sock_net(sk); |
1da177e4 LT |
2298 | int err; |
2299 | struct sadb_address *sa; | |
2300 | struct sadb_x_policy *pol; | |
03e1ad7b | 2301 | struct xfrm_policy *xp; |
1da177e4 | 2302 | struct xfrm_selector sel; |
26b15dad | 2303 | struct km_event c; |
df71837d | 2304 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2305 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2306 | |
2307 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2308 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2309 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2310 | return -EINVAL; | |
2311 | ||
2312 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2313 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2314 | return -EINVAL; | |
2315 | ||
2316 | memset(&sel, 0, sizeof(sel)); | |
2317 | ||
8ff24541 | 2318 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2319 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2320 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2321 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2322 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2323 | if (sel.sport) | |
8f83f23e | 2324 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2325 | |
8ff24541 | 2326 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2327 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2328 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2329 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2330 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2331 | if (sel.dport) | |
8f83f23e | 2332 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2333 | |
df71837d | 2334 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
df71837d TJ |
2335 | if (sec_ctx != NULL) { |
2336 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2337 | ||
2338 | if (!uctx) | |
2339 | return -ENOMEM; | |
2340 | ||
03e1ad7b | 2341 | err = security_xfrm_policy_alloc(&pol_ctx, uctx); |
df71837d | 2342 | kfree(uctx); |
df71837d TJ |
2343 | if (err) |
2344 | return err; | |
2db3e47e | 2345 | } |
161a09e7 | 2346 | |
07fb0f17 | 2347 | xp = xfrm_policy_bysel_ctx(net, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b PM |
2348 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2349 | 1, &err); | |
2350 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2351 | if (xp == NULL) |
2352 | return -ENOENT; | |
2353 | ||
ab5f5e8b | 2354 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2355 | audit_get_loginuid(current), |
2356 | audit_get_sessionid(current), 0); | |
13fcfbb0 DM |
2357 | |
2358 | if (err) | |
c8c05a8e | 2359 | goto out; |
13fcfbb0 | 2360 | |
26b15dad JHS |
2361 | c.seq = hdr->sadb_msg_seq; |
2362 | c.pid = hdr->sadb_msg_pid; | |
1839faab | 2363 | c.data.byid = 0; |
f60f6b8f | 2364 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2365 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2366 | ||
c8c05a8e | 2367 | out: |
26b15dad JHS |
2368 | xfrm_pol_put(xp); |
2369 | return err; | |
2370 | } | |
2371 | ||
2372 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) | |
2373 | { | |
2374 | int err; | |
2375 | struct sk_buff *out_skb; | |
2376 | struct sadb_msg *out_hdr; | |
2377 | err = 0; | |
2378 | ||
1da177e4 LT |
2379 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2380 | if (IS_ERR(out_skb)) { | |
2381 | err = PTR_ERR(out_skb); | |
2382 | goto out; | |
2383 | } | |
55569ce2 KM |
2384 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2385 | if (err < 0) | |
2386 | goto out; | |
1da177e4 LT |
2387 | |
2388 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2389 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2390 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2391 | out_hdr->sadb_msg_satype = 0; |
2392 | out_hdr->sadb_msg_errno = 0; | |
2393 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2394 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
07fb0f17 | 2395 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4 LT |
2396 | err = 0; |
2397 | ||
2398 | out: | |
1da177e4 LT |
2399 | return err; |
2400 | } | |
2401 | ||
08de61be SS |
2402 | #ifdef CONFIG_NET_KEY_MIGRATE |
2403 | static int pfkey_sockaddr_pair_size(sa_family_t family) | |
2404 | { | |
9e8b4ed8 | 2405 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2406 | } |
2407 | ||
13c1d189 | 2408 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2409 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2410 | u16 *family) | |
2411 | { | |
5f95ac91 YH |
2412 | int af, socklen; |
2413 | ||
13c1d189 | 2414 | if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2415 | return -EINVAL; |
2416 | ||
13c1d189 | 2417 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2418 | if (!af) |
2419 | return -EINVAL; | |
2420 | ||
2421 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2422 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2423 | daddr) != af) |
08de61be | 2424 | return -EINVAL; |
08de61be | 2425 | |
5f95ac91 | 2426 | *family = af; |
08de61be SS |
2427 | return 0; |
2428 | } | |
2429 | ||
2430 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, | |
2431 | struct xfrm_migrate *m) | |
2432 | { | |
2433 | int err; | |
2434 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2435 | int mode; |
08de61be SS |
2436 | |
2437 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2438 | len < rq1->sadb_x_ipsecrequest_len) | |
2439 | return -EINVAL; | |
2440 | ||
2441 | /* old endoints */ | |
13c1d189 AE |
2442 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
2443 | rq1->sadb_x_ipsecrequest_len, | |
2444 | &m->old_saddr, &m->old_daddr, | |
08de61be SS |
2445 | &m->old_family); |
2446 | if (err) | |
2447 | return err; | |
2448 | ||
2449 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2450 | len -= rq1->sadb_x_ipsecrequest_len; | |
2451 | ||
2452 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2453 | len < rq2->sadb_x_ipsecrequest_len) | |
2454 | return -EINVAL; | |
2455 | ||
2456 | /* new endpoints */ | |
13c1d189 AE |
2457 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
2458 | rq2->sadb_x_ipsecrequest_len, | |
2459 | &m->new_saddr, &m->new_daddr, | |
08de61be SS |
2460 | &m->new_family); |
2461 | if (err) | |
2462 | return err; | |
2463 | ||
2464 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2465 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2466 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2467 | return -EINVAL; | |
2468 | ||
2469 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2470 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2471 | return -EINVAL; | |
2472 | m->mode = mode; | |
08de61be SS |
2473 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2474 | ||
2475 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2476 | rq2->sadb_x_ipsecrequest_len)); | |
2477 | } | |
2478 | ||
2479 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2480 | struct sadb_msg *hdr, void **ext_hdrs) | |
2481 | { | |
2482 | int i, len, ret, err = -EINVAL; | |
2483 | u8 dir; | |
2484 | struct sadb_address *sa; | |
13c1d189 | 2485 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2486 | struct sadb_x_policy *pol; |
2487 | struct sadb_x_ipsecrequest *rq; | |
2488 | struct xfrm_selector sel; | |
2489 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2490 | struct xfrm_kmaddress k; |
08de61be SS |
2491 | |
2492 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2493 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2494 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2495 | err = -EINVAL; | |
2496 | goto out; | |
2497 | } | |
2498 | ||
13c1d189 | 2499 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2500 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2501 | |
2502 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2503 | err = -EINVAL; | |
2504 | goto out; | |
2505 | } | |
2506 | ||
13c1d189 AE |
2507 | if (kma) { |
2508 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2509 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2510 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2511 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2512 | &k.local, &k.remote, &k.family); | |
2513 | if (ret < 0) { | |
2514 | err = ret; | |
2515 | goto out; | |
2516 | } | |
2517 | } | |
2518 | ||
08de61be SS |
2519 | dir = pol->sadb_x_policy_dir - 1; |
2520 | memset(&sel, 0, sizeof(sel)); | |
2521 | ||
2522 | /* set source address info of selector */ | |
2523 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2524 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2525 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2526 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2527 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2528 | if (sel.sport) | |
582ee43d | 2529 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2530 | |
2531 | /* set destination address info of selector */ | |
2532 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], | |
2533 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2534 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2535 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2536 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2537 | if (sel.dport) | |
582ee43d | 2538 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2539 | |
2540 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2541 | ||
2542 | /* extract ipsecrequests */ | |
2543 | i = 0; | |
2544 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2545 | ||
2546 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2547 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2548 | if (ret < 0) { | |
2549 | err = ret; | |
2550 | goto out; | |
2551 | } else { | |
2552 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2553 | len -= ret; | |
2554 | i++; | |
2555 | } | |
2556 | } | |
2557 | ||
2558 | if (!i || len > 0) { | |
2559 | err = -EINVAL; | |
2560 | goto out; | |
2561 | } | |
2562 | ||
13c1d189 AE |
2563 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
2564 | kma ? &k : NULL); | |
08de61be SS |
2565 | |
2566 | out: | |
2567 | return err; | |
2568 | } | |
2569 | #else | |
2570 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2571 | struct sadb_msg *hdr, void **ext_hdrs) | |
2572 | { | |
2573 | return -ENOPROTOOPT; | |
2574 | } | |
2575 | #endif | |
2576 | ||
2577 | ||
1da177e4 LT |
2578 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2579 | { | |
07fb0f17 | 2580 | struct net *net = sock_net(sk); |
77d8d7a6 | 2581 | unsigned int dir; |
215a2dd3 | 2582 | int err = 0, delete; |
1da177e4 LT |
2583 | struct sadb_x_policy *pol; |
2584 | struct xfrm_policy *xp; | |
26b15dad | 2585 | struct km_event c; |
1da177e4 LT |
2586 | |
2587 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2588 | return -EINVAL; | |
2589 | ||
77d8d7a6 HX |
2590 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2591 | if (dir >= XFRM_POLICY_MAX) | |
2592 | return -EINVAL; | |
2593 | ||
215a2dd3 | 2594 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
07fb0f17 | 2595 | xp = xfrm_policy_byid(net, XFRM_POLICY_TYPE_MAIN, dir, |
8d1211a6 | 2596 | pol->sadb_x_policy_id, delete, &err); |
1da177e4 LT |
2597 | if (xp == NULL) |
2598 | return -ENOENT; | |
2599 | ||
215a2dd3 | 2600 | if (delete) { |
ab5f5e8b | 2601 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2602 | audit_get_loginuid(current), |
2603 | audit_get_sessionid(current), 0); | |
1da177e4 | 2604 | |
215a2dd3 EP |
2605 | if (err) |
2606 | goto out; | |
2607 | c.seq = hdr->sadb_msg_seq; | |
2608 | c.pid = hdr->sadb_msg_pid; | |
bf08867f | 2609 | c.data.byid = 1; |
f60f6b8f | 2610 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2611 | km_policy_notify(xp, dir, &c); |
26b15dad | 2612 | } else { |
77d8d7a6 | 2613 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2614 | } |
1da177e4 | 2615 | |
215a2dd3 | 2616 | out: |
1da177e4 LT |
2617 | xfrm_pol_put(xp); |
2618 | return err; | |
2619 | } | |
2620 | ||
2621 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2622 | { | |
83321d6b | 2623 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2624 | struct sk_buff *out_skb; |
2625 | struct sadb_msg *out_hdr; | |
55569ce2 | 2626 | int err; |
1da177e4 | 2627 | |
83321d6b TT |
2628 | if (!pfkey_can_dump(&pfk->sk)) |
2629 | return -ENOBUFS; | |
2630 | ||
1da177e4 LT |
2631 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2632 | if (IS_ERR(out_skb)) | |
2633 | return PTR_ERR(out_skb); | |
2634 | ||
55569ce2 KM |
2635 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2636 | if (err < 0) | |
2637 | return err; | |
1da177e4 LT |
2638 | |
2639 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2640 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2641 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2642 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2643 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2644 | out_hdr->sadb_msg_seq = count + 1; |
83321d6b | 2645 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
12a169e7 HX |
2646 | |
2647 | if (pfk->dump.skb) | |
2648 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 2649 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
2650 | pfk->dump.skb = out_skb; |
2651 | ||
1da177e4 LT |
2652 | return 0; |
2653 | } | |
2654 | ||
83321d6b TT |
2655 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2656 | { | |
07fb0f17 AD |
2657 | struct net *net = sock_net(&pfk->sk); |
2658 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); | |
83321d6b TT |
2659 | } |
2660 | ||
2661 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2662 | { | |
2663 | xfrm_policy_walk_done(&pfk->dump.u.policy); | |
2664 | } | |
2665 | ||
1da177e4 LT |
2666 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2667 | { | |
83321d6b | 2668 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2669 | |
83321d6b TT |
2670 | if (pfk->dump.dump != NULL) |
2671 | return -EBUSY; | |
1da177e4 | 2672 | |
83321d6b TT |
2673 | pfk->dump.msg_version = hdr->sadb_msg_version; |
2674 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
2675 | pfk->dump.dump = pfkey_dump_sp; | |
2676 | pfk->dump.done = pfkey_dump_sp_done; | |
2677 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
2678 | ||
2679 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2680 | } |
2681 | ||
26b15dad | 2682 | static int key_notify_policy_flush(struct km_event *c) |
1da177e4 LT |
2683 | { |
2684 | struct sk_buff *skb_out; | |
26b15dad | 2685 | struct sadb_msg *hdr; |
1da177e4 | 2686 | |
26b15dad | 2687 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2688 | if (!skb_out) |
2689 | return -ENOBUFS; | |
26b15dad | 2690 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2691 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad JHS |
2692 | hdr->sadb_msg_seq = c->seq; |
2693 | hdr->sadb_msg_pid = c->pid; | |
2694 | hdr->sadb_msg_version = PF_KEY_V2; | |
2695 | hdr->sadb_msg_errno = (uint8_t) 0; | |
2696 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
07fb0f17 | 2697 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad | 2698 | return 0; |
1da177e4 | 2699 | |
26b15dad JHS |
2700 | } |
2701 | ||
2702 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2703 | { | |
07fb0f17 | 2704 | struct net *net = sock_net(sk); |
26b15dad | 2705 | struct km_event c; |
161a09e7 | 2706 | struct xfrm_audit audit_info; |
4aa2e62c | 2707 | int err; |
1da177e4 | 2708 | |
0c11b942 | 2709 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 2710 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 2711 | audit_info.secid = 0; |
07fb0f17 | 2712 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info); |
4aa2e62c JL |
2713 | if (err) |
2714 | return err; | |
f7b6983f | 2715 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2716 | c.event = XFRM_MSG_FLUSHPOLICY; |
26b15dad JHS |
2717 | c.pid = hdr->sadb_msg_pid; |
2718 | c.seq = hdr->sadb_msg_seq; | |
07fb0f17 | 2719 | c.net = net; |
26b15dad | 2720 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
2721 | |
2722 | return 0; | |
2723 | } | |
2724 | ||
2725 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
2726 | struct sadb_msg *hdr, void **ext_hdrs); | |
2727 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { | |
2728 | [SADB_RESERVED] = pfkey_reserved, | |
2729 | [SADB_GETSPI] = pfkey_getspi, | |
2730 | [SADB_UPDATE] = pfkey_add, | |
2731 | [SADB_ADD] = pfkey_add, | |
2732 | [SADB_DELETE] = pfkey_delete, | |
2733 | [SADB_GET] = pfkey_get, | |
2734 | [SADB_ACQUIRE] = pfkey_acquire, | |
2735 | [SADB_REGISTER] = pfkey_register, | |
2736 | [SADB_EXPIRE] = NULL, | |
2737 | [SADB_FLUSH] = pfkey_flush, | |
2738 | [SADB_DUMP] = pfkey_dump, | |
2739 | [SADB_X_PROMISC] = pfkey_promisc, | |
2740 | [SADB_X_PCHANGE] = NULL, | |
2741 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2742 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2743 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2744 | [SADB_X_SPDGET] = pfkey_spdget, | |
2745 | [SADB_X_SPDACQUIRE] = NULL, | |
2746 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2747 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2748 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2749 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2750 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2751 | }; |
2752 | ||
2753 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) | |
2754 | { | |
2755 | void *ext_hdrs[SADB_EXT_MAX]; | |
2756 | int err; | |
2757 | ||
2758 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
07fb0f17 | 2759 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
1da177e4 LT |
2760 | |
2761 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2762 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2763 | if (!err) { | |
2764 | err = -EOPNOTSUPP; | |
2765 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2766 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2767 | } | |
2768 | return err; | |
2769 | } | |
2770 | ||
2771 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2772 | { | |
2773 | struct sadb_msg *hdr = NULL; | |
2774 | ||
2775 | if (skb->len < sizeof(*hdr)) { | |
2776 | *errp = -EMSGSIZE; | |
2777 | } else { | |
2778 | hdr = (struct sadb_msg *) skb->data; | |
2779 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2780 | hdr->sadb_msg_reserved != 0 || | |
2781 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2782 | hdr->sadb_msg_type > SADB_MAX)) { | |
2783 | hdr = NULL; | |
2784 | *errp = -EINVAL; | |
2785 | } else if (hdr->sadb_msg_len != (skb->len / | |
2786 | sizeof(uint64_t)) || | |
2787 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2788 | sizeof(uint64_t))) { | |
2789 | hdr = NULL; | |
2790 | *errp = -EMSGSIZE; | |
2791 | } else { | |
2792 | *errp = 0; | |
2793 | } | |
2794 | } | |
2795 | return hdr; | |
2796 | } | |
2797 | ||
2798 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2799 | { | |
f398035f HX |
2800 | unsigned int id = d->desc.sadb_alg_id; |
2801 | ||
2802 | if (id >= sizeof(t->aalgos) * 8) | |
2803 | return 0; | |
2804 | ||
2805 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2806 | } |
2807 | ||
2808 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2809 | { | |
f398035f HX |
2810 | unsigned int id = d->desc.sadb_alg_id; |
2811 | ||
2812 | if (id >= sizeof(t->ealgos) * 8) | |
2813 | return 0; | |
2814 | ||
2815 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2816 | } |
2817 | ||
2818 | static int count_ah_combs(struct xfrm_tmpl *t) | |
2819 | { | |
2820 | int i, sz = 0; | |
2821 | ||
2822 | for (i = 0; ; i++) { | |
2823 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2824 | if (!aalg) | |
2825 | break; | |
2826 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2827 | sz += sizeof(struct sadb_comb); | |
2828 | } | |
2829 | return sz + sizeof(struct sadb_prop); | |
2830 | } | |
2831 | ||
2832 | static int count_esp_combs(struct xfrm_tmpl *t) | |
2833 | { | |
2834 | int i, k, sz = 0; | |
2835 | ||
2836 | for (i = 0; ; i++) { | |
2837 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2838 | if (!ealg) | |
2839 | break; | |
8ff24541 | 2840 | |
1da177e4 LT |
2841 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2842 | continue; | |
8ff24541 | 2843 | |
1da177e4 LT |
2844 | for (k = 1; ; k++) { |
2845 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2846 | if (!aalg) | |
2847 | break; | |
8ff24541 | 2848 | |
1da177e4 LT |
2849 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2850 | sz += sizeof(struct sadb_comb); | |
2851 | } | |
2852 | } | |
2853 | return sz + sizeof(struct sadb_prop); | |
2854 | } | |
2855 | ||
2856 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2857 | { | |
2858 | struct sadb_prop *p; | |
2859 | int i; | |
2860 | ||
2861 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2862 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2863 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2864 | p->sadb_prop_replay = 32; | |
2865 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2866 | ||
2867 | for (i = 0; ; i++) { | |
2868 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2869 | if (!aalg) | |
2870 | break; | |
2871 | ||
2872 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | |
2873 | struct sadb_comb *c; | |
2874 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2875 | memset(c, 0, sizeof(*c)); | |
2876 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2877 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2878 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2879 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2880 | c->sadb_comb_hard_addtime = 24*60*60; | |
2881 | c->sadb_comb_soft_addtime = 20*60*60; | |
2882 | c->sadb_comb_hard_usetime = 8*60*60; | |
2883 | c->sadb_comb_soft_usetime = 7*60*60; | |
2884 | } | |
2885 | } | |
2886 | } | |
2887 | ||
2888 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2889 | { | |
2890 | struct sadb_prop *p; | |
2891 | int i, k; | |
2892 | ||
2893 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2894 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2895 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2896 | p->sadb_prop_replay = 32; | |
2897 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2898 | ||
2899 | for (i=0; ; i++) { | |
2900 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2901 | if (!ealg) | |
2902 | break; | |
8ff24541 | 2903 | |
1da177e4 LT |
2904 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2905 | continue; | |
8ff24541 | 2906 | |
1da177e4 LT |
2907 | for (k = 1; ; k++) { |
2908 | struct sadb_comb *c; | |
2909 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2910 | if (!aalg) | |
2911 | break; | |
2912 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | |
2913 | continue; | |
2914 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2915 | memset(c, 0, sizeof(*c)); | |
2916 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2917 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2918 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2919 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2920 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2921 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2922 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2923 | c->sadb_comb_hard_addtime = 24*60*60; | |
2924 | c->sadb_comb_soft_addtime = 20*60*60; | |
2925 | c->sadb_comb_hard_usetime = 8*60*60; | |
2926 | c->sadb_comb_soft_usetime = 7*60*60; | |
2927 | } | |
2928 | } | |
2929 | } | |
2930 | ||
26b15dad JHS |
2931 | static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) |
2932 | { | |
2933 | return 0; | |
2934 | } | |
2935 | ||
2936 | static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) | |
1da177e4 LT |
2937 | { |
2938 | struct sk_buff *out_skb; | |
2939 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2940 | int hard; |
2941 | int hsc; | |
2942 | ||
bf08867f | 2943 | hard = c->data.hard; |
26b15dad JHS |
2944 | if (hard) |
2945 | hsc = 2; | |
2946 | else | |
2947 | hsc = 1; | |
1da177e4 | 2948 | |
050f009e | 2949 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
2950 | if (IS_ERR(out_skb)) |
2951 | return PTR_ERR(out_skb); | |
2952 | ||
2953 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2954 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2955 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
2956 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2957 | out_hdr->sadb_msg_errno = 0; | |
2958 | out_hdr->sadb_msg_reserved = 0; | |
2959 | out_hdr->sadb_msg_seq = 0; | |
2960 | out_hdr->sadb_msg_pid = 0; | |
2961 | ||
07fb0f17 | 2962 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
2963 | return 0; |
2964 | } | |
2965 | ||
26b15dad JHS |
2966 | static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) |
2967 | { | |
07fb0f17 | 2968 | struct net *net = x ? xs_net(x) : c->net; |
3fa87a32 AD |
2969 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
2970 | ||
2971 | if (atomic_read(&net_pfkey->socks_nr) == 0) | |
99c6f60e JHS |
2972 | return 0; |
2973 | ||
26b15dad | 2974 | switch (c->event) { |
f60f6b8f | 2975 | case XFRM_MSG_EXPIRE: |
26b15dad | 2976 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
2977 | case XFRM_MSG_DELSA: |
2978 | case XFRM_MSG_NEWSA: | |
2979 | case XFRM_MSG_UPDSA: | |
26b15dad | 2980 | return key_notify_sa(x, c); |
f60f6b8f | 2981 | case XFRM_MSG_FLUSHSA: |
26b15dad | 2982 | return key_notify_sa_flush(c); |
d51d081d JHS |
2983 | case XFRM_MSG_NEWAE: /* not yet supported */ |
2984 | break; | |
26b15dad JHS |
2985 | default: |
2986 | printk("pfkey: Unknown SA event %d\n", c->event); | |
2987 | break; | |
2988 | } | |
2989 | ||
2990 | return 0; | |
2991 | } | |
2992 | ||
2993 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2994 | { | |
f7b6983f MN |
2995 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
2996 | return 0; | |
2997 | ||
26b15dad | 2998 | switch (c->event) { |
f60f6b8f | 2999 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 3000 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
3001 | case XFRM_MSG_DELPOLICY: |
3002 | case XFRM_MSG_NEWPOLICY: | |
3003 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 3004 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 3005 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
3006 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
3007 | break; | |
26b15dad JHS |
3008 | return key_notify_policy_flush(c); |
3009 | default: | |
3010 | printk("pfkey: Unknown policy event %d\n", c->event); | |
3011 | break; | |
3012 | } | |
3013 | ||
3014 | return 0; | |
3015 | } | |
3016 | ||
1da177e4 LT |
3017 | static u32 get_acqseq(void) |
3018 | { | |
3019 | u32 res; | |
3020 | static u32 acqseq; | |
3021 | static DEFINE_SPINLOCK(acqseq_lock); | |
3022 | ||
3023 | spin_lock_bh(&acqseq_lock); | |
3024 | res = (++acqseq ? : ++acqseq); | |
3025 | spin_unlock_bh(&acqseq_lock); | |
3026 | return res; | |
3027 | } | |
3028 | ||
3029 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | |
3030 | { | |
3031 | struct sk_buff *skb; | |
3032 | struct sadb_msg *hdr; | |
3033 | struct sadb_address *addr; | |
3034 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3035 | int sockaddr_size; |
3036 | int size; | |
4e2ba18e VY |
3037 | struct sadb_x_sec_ctx *sec_ctx; |
3038 | struct xfrm_sec_ctx *xfrm_ctx; | |
3039 | int ctx_size = 0; | |
8ff24541 | 3040 | |
1da177e4 LT |
3041 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3042 | if (!sockaddr_size) | |
3043 | return -EINVAL; | |
3044 | ||
3045 | size = sizeof(struct sadb_msg) + | |
3046 | (sizeof(struct sadb_address) * 2) + | |
3047 | (sockaddr_size * 2) + | |
3048 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3049 | |
1da177e4 LT |
3050 | if (x->id.proto == IPPROTO_AH) |
3051 | size += count_ah_combs(t); | |
3052 | else if (x->id.proto == IPPROTO_ESP) | |
3053 | size += count_esp_combs(t); | |
3054 | ||
4e2ba18e VY |
3055 | if ((xfrm_ctx = x->security)) { |
3056 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3057 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3058 | } | |
3059 | ||
1da177e4 LT |
3060 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3061 | if (skb == NULL) | |
3062 | return -ENOMEM; | |
8ff24541 | 3063 | |
1da177e4 LT |
3064 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3065 | hdr->sadb_msg_version = PF_KEY_V2; | |
3066 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3067 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3068 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3069 | hdr->sadb_msg_errno = 0; | |
3070 | hdr->sadb_msg_reserved = 0; | |
3071 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3072 | hdr->sadb_msg_pid = 0; | |
3073 | ||
3074 | /* src address */ | |
8ff24541 | 3075 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 3076 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 3077 | addr->sadb_address_len = |
1da177e4 LT |
3078 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3079 | sizeof(uint64_t); | |
3080 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3081 | addr->sadb_address_proto = 0; | |
3082 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3083 | addr->sadb_address_prefixlen = |
3084 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3085 | (struct sockaddr *) (addr + 1), | |
3086 | x->props.family); | |
3087 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3088 | BUG(); |
8ff24541 | 3089 | |
1da177e4 | 3090 | /* dst address */ |
8ff24541 | 3091 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
3092 | sizeof(struct sadb_address)+sockaddr_size); |
3093 | addr->sadb_address_len = | |
3094 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3095 | sizeof(uint64_t); | |
3096 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3097 | addr->sadb_address_proto = 0; | |
3098 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3099 | addr->sadb_address_prefixlen = |
3100 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3101 | (struct sockaddr *) (addr + 1), | |
3102 | x->props.family); | |
3103 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3104 | BUG(); |
3105 | ||
3106 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
3107 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
3108 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3109 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3110 | pol->sadb_x_policy_dir = dir+1; | |
3111 | pol->sadb_x_policy_id = xp->index; | |
3112 | ||
3113 | /* Set sadb_comb's. */ | |
3114 | if (x->id.proto == IPPROTO_AH) | |
3115 | dump_ah_combs(skb, t); | |
3116 | else if (x->id.proto == IPPROTO_ESP) | |
3117 | dump_esp_combs(skb, t); | |
3118 | ||
4e2ba18e VY |
3119 | /* security context */ |
3120 | if (xfrm_ctx) { | |
3121 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
3122 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
3123 | sec_ctx->sadb_x_sec_len = | |
3124 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3125 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3126 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3127 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3128 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3129 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3130 | xfrm_ctx->ctx_len); | |
3131 | } | |
3132 | ||
07fb0f17 | 3133 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
3134 | } |
3135 | ||
cb969f07 | 3136 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3137 | u8 *data, int len, int *dir) |
1da177e4 | 3138 | { |
07fb0f17 | 3139 | struct net *net = sock_net(sk); |
1da177e4 LT |
3140 | struct xfrm_policy *xp; |
3141 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3142 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3143 | |
cb969f07 | 3144 | switch (sk->sk_family) { |
1da177e4 LT |
3145 | case AF_INET: |
3146 | if (opt != IP_IPSEC_POLICY) { | |
3147 | *dir = -EOPNOTSUPP; | |
3148 | return NULL; | |
3149 | } | |
3150 | break; | |
3151 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3152 | case AF_INET6: | |
3153 | if (opt != IPV6_IPSEC_POLICY) { | |
3154 | *dir = -EOPNOTSUPP; | |
3155 | return NULL; | |
3156 | } | |
3157 | break; | |
3158 | #endif | |
3159 | default: | |
3160 | *dir = -EINVAL; | |
3161 | return NULL; | |
3162 | } | |
3163 | ||
3164 | *dir = -EINVAL; | |
3165 | ||
3166 | if (len < sizeof(struct sadb_x_policy) || | |
3167 | pol->sadb_x_policy_len*8 > len || | |
3168 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3169 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3170 | return NULL; | |
3171 | ||
07fb0f17 | 3172 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
3173 | if (xp == NULL) { |
3174 | *dir = -ENOBUFS; | |
3175 | return NULL; | |
3176 | } | |
3177 | ||
3178 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3179 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3180 | ||
3181 | xp->lft.soft_byte_limit = XFRM_INF; | |
3182 | xp->lft.hard_byte_limit = XFRM_INF; | |
3183 | xp->lft.soft_packet_limit = XFRM_INF; | |
3184 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3185 | xp->family = sk->sk_family; |
1da177e4 LT |
3186 | |
3187 | xp->xfrm_nr = 0; | |
3188 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3189 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3190 | goto out; | |
3191 | ||
df71837d TJ |
3192 | /* security context too */ |
3193 | if (len >= (pol->sadb_x_policy_len*8 + | |
3194 | sizeof(struct sadb_x_sec_ctx))) { | |
3195 | char *p = (char *)pol; | |
3196 | struct xfrm_user_sec_ctx *uctx; | |
3197 | ||
3198 | p += pol->sadb_x_policy_len*8; | |
3199 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3200 | if (len < pol->sadb_x_policy_len*8 + | |
cb969f07 VY |
3201 | sec_ctx->sadb_x_sec_len) { |
3202 | *dir = -EINVAL; | |
df71837d | 3203 | goto out; |
cb969f07 | 3204 | } |
df71837d TJ |
3205 | if ((*dir = verify_sec_ctx_len(p))) |
3206 | goto out; | |
3207 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
03e1ad7b | 3208 | *dir = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
3209 | kfree(uctx); |
3210 | ||
3211 | if (*dir) | |
3212 | goto out; | |
3213 | } | |
3214 | ||
1da177e4 LT |
3215 | *dir = pol->sadb_x_policy_dir-1; |
3216 | return xp; | |
3217 | ||
3218 | out: | |
70e90679 | 3219 | xp->walk.dead = 1; |
64c31b3f | 3220 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3221 | return NULL; |
3222 | } | |
3223 | ||
5d36b180 | 3224 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3225 | { |
3226 | struct sk_buff *skb; | |
3227 | struct sadb_msg *hdr; | |
3228 | struct sadb_sa *sa; | |
3229 | struct sadb_address *addr; | |
3230 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3231 | int sockaddr_size; |
3232 | int size; | |
3233 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3234 | struct xfrm_encap_tmpl *natt = NULL; | |
3235 | ||
3236 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3237 | if (!sockaddr_size) | |
3238 | return -EINVAL; | |
3239 | ||
3240 | if (!satype) | |
3241 | return -EINVAL; | |
3242 | ||
3243 | if (!x->encap) | |
3244 | return -EINVAL; | |
3245 | ||
3246 | natt = x->encap; | |
3247 | ||
3248 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3249 | * | |
3250 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3251 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3252 | */ | |
8ff24541 | 3253 | |
1da177e4 LT |
3254 | size = sizeof(struct sadb_msg) + |
3255 | sizeof(struct sadb_sa) + | |
3256 | (sizeof(struct sadb_address) * 2) + | |
3257 | (sockaddr_size * 2) + | |
3258 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3259 | |
1da177e4 LT |
3260 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3261 | if (skb == NULL) | |
3262 | return -ENOMEM; | |
8ff24541 | 3263 | |
1da177e4 LT |
3264 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3265 | hdr->sadb_msg_version = PF_KEY_V2; | |
3266 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3267 | hdr->sadb_msg_satype = satype; | |
3268 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3269 | hdr->sadb_msg_errno = 0; | |
3270 | hdr->sadb_msg_reserved = 0; | |
3271 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3272 | hdr->sadb_msg_pid = 0; | |
3273 | ||
3274 | /* SA */ | |
3275 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
3276 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
3277 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3278 | sa->sadb_sa_spi = x->id.spi; | |
3279 | sa->sadb_sa_replay = 0; | |
3280 | sa->sadb_sa_state = 0; | |
3281 | sa->sadb_sa_auth = 0; | |
3282 | sa->sadb_sa_encrypt = 0; | |
3283 | sa->sadb_sa_flags = 0; | |
3284 | ||
3285 | /* ADDRESS_SRC (old addr) */ | |
3286 | addr = (struct sadb_address*) | |
3287 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3288 | addr->sadb_address_len = |
1da177e4 LT |
3289 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3290 | sizeof(uint64_t); | |
3291 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3292 | addr->sadb_address_proto = 0; | |
3293 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3294 | addr->sadb_address_prefixlen = |
3295 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3296 | (struct sockaddr *) (addr + 1), | |
3297 | x->props.family); | |
3298 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3299 | BUG(); |
3300 | ||
3301 | /* NAT_T_SPORT (old port) */ | |
3302 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3303 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3304 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3305 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3306 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3307 | ||
3308 | /* ADDRESS_DST (new addr) */ | |
3309 | addr = (struct sadb_address*) | |
3310 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3311 | addr->sadb_address_len = |
1da177e4 LT |
3312 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3313 | sizeof(uint64_t); | |
3314 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3315 | addr->sadb_address_proto = 0; | |
3316 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3317 | addr->sadb_address_prefixlen = |
3318 | pfkey_sockaddr_fill(ipaddr, 0, | |
3319 | (struct sockaddr *) (addr + 1), | |
3320 | x->props.family); | |
3321 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3322 | BUG(); |
3323 | ||
3324 | /* NAT_T_DPORT (new port) */ | |
3325 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3326 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3327 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3328 | n_port->sadb_x_nat_t_port_port = sport; | |
3329 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3330 | ||
07fb0f17 | 3331 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
3332 | } |
3333 | ||
08de61be SS |
3334 | #ifdef CONFIG_NET_KEY_MIGRATE |
3335 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
3336 | struct xfrm_selector *sel) | |
3337 | { | |
3338 | struct sadb_address *addr; | |
08de61be SS |
3339 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); |
3340 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; | |
3341 | addr->sadb_address_exttype = type; | |
3342 | addr->sadb_address_proto = sel->proto; | |
3343 | addr->sadb_address_reserved = 0; | |
3344 | ||
3345 | switch (type) { | |
3346 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3347 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3348 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3349 | (struct sockaddr *)(addr + 1), | |
3350 | sel->family); | |
08de61be SS |
3351 | break; |
3352 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3353 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3354 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3355 | (struct sockaddr *)(addr + 1), | |
3356 | sel->family); | |
08de61be SS |
3357 | break; |
3358 | default: | |
3359 | return -EINVAL; | |
3360 | } | |
3361 | ||
3362 | return 0; | |
3363 | } | |
3364 | ||
13c1d189 AE |
3365 | |
3366 | static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k) | |
3367 | { | |
3368 | struct sadb_x_kmaddress *kma; | |
3369 | u8 *sa; | |
3370 | int family = k->family; | |
3371 | int socklen = pfkey_sockaddr_len(family); | |
3372 | int size_req; | |
3373 | ||
3374 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3375 | pfkey_sockaddr_pair_size(family)); | |
3376 | ||
3377 | kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req); | |
3378 | memset(kma, 0, size_req); | |
3379 | kma->sadb_x_kmaddress_len = size_req / 8; | |
3380 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3381 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3382 | ||
3383 | sa = (u8 *)(kma + 1); | |
3384 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3385 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3386 | return -EINVAL; | |
3387 | ||
3388 | return 0; | |
3389 | } | |
3390 | ||
08de61be SS |
3391 | static int set_ipsecrequest(struct sk_buff *skb, |
3392 | uint8_t proto, uint8_t mode, int level, | |
3393 | uint32_t reqid, uint8_t family, | |
3394 | xfrm_address_t *src, xfrm_address_t *dst) | |
3395 | { | |
3396 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3397 | u8 *sa; |
3398 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3399 | int size_req; |
3400 | ||
3401 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3402 | pfkey_sockaddr_pair_size(family); | |
3403 | ||
3404 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); | |
3405 | memset(rq, 0, size_req); | |
3406 | rq->sadb_x_ipsecrequest_len = size_req; | |
3407 | rq->sadb_x_ipsecrequest_proto = proto; | |
3408 | rq->sadb_x_ipsecrequest_mode = mode; | |
3409 | rq->sadb_x_ipsecrequest_level = level; | |
3410 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3411 | ||
e5b56652 YH |
3412 | sa = (u8 *) (rq + 1); |
3413 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3414 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3415 | return -EINVAL; |
08de61be SS |
3416 | |
3417 | return 0; | |
3418 | } | |
3419 | #endif | |
3420 | ||
3421 | #ifdef CONFIG_NET_KEY_MIGRATE | |
3422 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
3423 | struct xfrm_migrate *m, int num_bundles, |
3424 | struct xfrm_kmaddress *k) | |
08de61be SS |
3425 | { |
3426 | int i; | |
3427 | int sasize_sel; | |
3428 | int size = 0; | |
3429 | int size_pol = 0; | |
3430 | struct sk_buff *skb; | |
3431 | struct sadb_msg *hdr; | |
3432 | struct sadb_x_policy *pol; | |
3433 | struct xfrm_migrate *mp; | |
3434 | ||
3435 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3436 | return 0; | |
3437 | ||
3438 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3439 | return -EINVAL; | |
3440 | ||
13c1d189 AE |
3441 | if (k != NULL) { |
3442 | /* addresses for KM */ | |
3443 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3444 | pfkey_sockaddr_pair_size(k->family)); | |
3445 | } | |
3446 | ||
08de61be SS |
3447 | /* selector */ |
3448 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3449 | if (!sasize_sel) | |
3450 | return -EINVAL; | |
3451 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3452 | ||
3453 | /* policy info */ | |
3454 | size_pol += sizeof(struct sadb_x_policy); | |
3455 | ||
3456 | /* ipsecrequests */ | |
3457 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3458 | /* old locator pair */ | |
3459 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3460 | pfkey_sockaddr_pair_size(mp->old_family); | |
3461 | /* new locator pair */ | |
3462 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3463 | pfkey_sockaddr_pair_size(mp->new_family); | |
3464 | } | |
3465 | ||
3466 | size += sizeof(struct sadb_msg) + size_pol; | |
3467 | ||
3468 | /* alloc buffer */ | |
3469 | skb = alloc_skb(size, GFP_ATOMIC); | |
3470 | if (skb == NULL) | |
3471 | return -ENOMEM; | |
3472 | ||
3473 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); | |
3474 | hdr->sadb_msg_version = PF_KEY_V2; | |
3475 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3476 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3477 | hdr->sadb_msg_len = size / 8; | |
3478 | hdr->sadb_msg_errno = 0; | |
3479 | hdr->sadb_msg_reserved = 0; | |
3480 | hdr->sadb_msg_seq = 0; | |
3481 | hdr->sadb_msg_pid = 0; | |
3482 | ||
13c1d189 AE |
3483 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3484 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
3485 | return -EINVAL; | |
3486 | ||
08de61be SS |
3487 | /* selector src */ |
3488 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3489 | ||
3490 | /* selector dst */ | |
3491 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3492 | ||
3493 | /* policy information */ | |
3494 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); | |
3495 | pol->sadb_x_policy_len = size_pol / 8; | |
3496 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3497 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3498 | pol->sadb_x_policy_dir = dir + 1; | |
3499 | pol->sadb_x_policy_id = 0; | |
3500 | pol->sadb_x_policy_priority = 0; | |
3501 | ||
3502 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3503 | /* old ipsecrequest */ | |
55569ce2 KM |
3504 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3505 | if (mode < 0) | |
d4782c32 | 3506 | goto err; |
55569ce2 | 3507 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3508 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3509 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3510 | &mp->old_saddr, &mp->old_daddr) < 0) |
3511 | goto err; | |
08de61be SS |
3512 | |
3513 | /* new ipsecrequest */ | |
55569ce2 | 3514 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3515 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3516 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3517 | &mp->new_saddr, &mp->new_daddr) < 0) |
3518 | goto err; | |
08de61be SS |
3519 | } |
3520 | ||
3521 | /* broadcast migrate message to sockets */ | |
07fb0f17 | 3522 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61be SS |
3523 | |
3524 | return 0; | |
d4782c32 PM |
3525 | |
3526 | err: | |
3527 | kfree_skb(skb); | |
3528 | return -EINVAL; | |
08de61be SS |
3529 | } |
3530 | #else | |
3531 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
3532 | struct xfrm_migrate *m, int num_bundles, |
3533 | struct xfrm_kmaddress *k) | |
08de61be SS |
3534 | { |
3535 | return -ENOPROTOOPT; | |
3536 | } | |
3537 | #endif | |
3538 | ||
1da177e4 LT |
3539 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3540 | struct socket *sock, struct msghdr *msg, size_t len) | |
3541 | { | |
3542 | struct sock *sk = sock->sk; | |
3543 | struct sk_buff *skb = NULL; | |
3544 | struct sadb_msg *hdr = NULL; | |
3545 | int err; | |
3546 | ||
3547 | err = -EOPNOTSUPP; | |
3548 | if (msg->msg_flags & MSG_OOB) | |
3549 | goto out; | |
3550 | ||
3551 | err = -EMSGSIZE; | |
3552 | if ((unsigned)len > sk->sk_sndbuf - 32) | |
3553 | goto out; | |
3554 | ||
3555 | err = -ENOBUFS; | |
3556 | skb = alloc_skb(len, GFP_KERNEL); | |
3557 | if (skb == NULL) | |
3558 | goto out; | |
3559 | ||
3560 | err = -EFAULT; | |
3561 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3562 | goto out; | |
3563 | ||
3564 | hdr = pfkey_get_base_msg(skb, &err); | |
3565 | if (!hdr) | |
3566 | goto out; | |
3567 | ||
4a3e2f71 | 3568 | mutex_lock(&xfrm_cfg_mutex); |
1da177e4 | 3569 | err = pfkey_process(sk, skb, hdr); |
4a3e2f71 | 3570 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 LT |
3571 | |
3572 | out: | |
3573 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3574 | err = 0; | |
6f961068 | 3575 | kfree_skb(skb); |
1da177e4 LT |
3576 | |
3577 | return err ? : len; | |
3578 | } | |
3579 | ||
3580 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3581 | struct socket *sock, struct msghdr *msg, size_t len, | |
3582 | int flags) | |
3583 | { | |
3584 | struct sock *sk = sock->sk; | |
83321d6b | 3585 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3586 | struct sk_buff *skb; |
3587 | int copied, err; | |
3588 | ||
3589 | err = -EINVAL; | |
3590 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3591 | goto out; | |
3592 | ||
3593 | msg->msg_namelen = 0; | |
3594 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | |
3595 | if (skb == NULL) | |
3596 | goto out; | |
3597 | ||
3598 | copied = skb->len; | |
3599 | if (copied > len) { | |
3600 | msg->msg_flags |= MSG_TRUNC; | |
3601 | copied = len; | |
3602 | } | |
3603 | ||
badff6d0 | 3604 | skb_reset_transport_header(skb); |
1da177e4 LT |
3605 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3606 | if (err) | |
3607 | goto out_free; | |
3608 | ||
3609 | sock_recv_timestamp(msg, sk, skb); | |
3610 | ||
3611 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3612 | ||
83321d6b TT |
3613 | if (pfk->dump.dump != NULL && |
3614 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3615 | pfkey_do_dump(pfk); | |
3616 | ||
1da177e4 LT |
3617 | out_free: |
3618 | skb_free_datagram(sk, skb); | |
3619 | out: | |
3620 | return err; | |
3621 | } | |
3622 | ||
90ddc4f0 | 3623 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3624 | .family = PF_KEY, |
3625 | .owner = THIS_MODULE, | |
3626 | /* Operations that make no sense on pfkey sockets. */ | |
3627 | .bind = sock_no_bind, | |
3628 | .connect = sock_no_connect, | |
3629 | .socketpair = sock_no_socketpair, | |
3630 | .accept = sock_no_accept, | |
3631 | .getname = sock_no_getname, | |
3632 | .ioctl = sock_no_ioctl, | |
3633 | .listen = sock_no_listen, | |
3634 | .shutdown = sock_no_shutdown, | |
3635 | .setsockopt = sock_no_setsockopt, | |
3636 | .getsockopt = sock_no_getsockopt, | |
3637 | .mmap = sock_no_mmap, | |
3638 | .sendpage = sock_no_sendpage, | |
3639 | ||
3640 | /* Now the operations that really occur. */ | |
3641 | .release = pfkey_release, | |
3642 | .poll = datagram_poll, | |
3643 | .sendmsg = pfkey_sendmsg, | |
3644 | .recvmsg = pfkey_recvmsg, | |
3645 | }; | |
3646 | ||
3647 | static struct net_proto_family pfkey_family_ops = { | |
3648 | .family = PF_KEY, | |
3649 | .create = pfkey_create, | |
3650 | .owner = THIS_MODULE, | |
3651 | }; | |
3652 | ||
3653 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3654 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3655 | { |
1da177e4 | 3656 | struct sock *s; |
1da177e4 | 3657 | |
bd2f7476 PE |
3658 | s = (struct sock *)v; |
3659 | if (v == SEQ_START_TOKEN) | |
3660 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3661 | else | |
3662 | seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n", | |
1da177e4 LT |
3663 | s, |
3664 | atomic_read(&s->sk_refcnt), | |
31e6d363 ED |
3665 | sk_rmem_alloc_get(s), |
3666 | sk_wmem_alloc_get(s), | |
1da177e4 LT |
3667 | sock_i_uid(s), |
3668 | sock_i_ino(s) | |
3669 | ); | |
bd2f7476 PE |
3670 | return 0; |
3671 | } | |
3672 | ||
3673 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
3674 | { | |
7013ec30 | 3675 | struct net *net = seq_file_net(f); |
3fa87a32 | 3676 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
bd2f7476 PE |
3677 | struct sock *s; |
3678 | struct hlist_node *node; | |
3679 | loff_t pos = *ppos; | |
1da177e4 | 3680 | |
bd2f7476 PE |
3681 | read_lock(&pfkey_table_lock); |
3682 | if (pos == 0) | |
3683 | return SEQ_START_TOKEN; | |
8ff24541 | 3684 | |
3fa87a32 | 3685 | sk_for_each(s, node, &net_pfkey->table) |
bd2f7476 PE |
3686 | if (pos-- == 1) |
3687 | return s; | |
1da177e4 | 3688 | |
bd2f7476 PE |
3689 | return NULL; |
3690 | } | |
3691 | ||
3692 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3693 | { | |
7013ec30 | 3694 | struct net *net = seq_file_net(f); |
3fa87a32 AD |
3695 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3696 | ||
bd2f7476 PE |
3697 | ++*ppos; |
3698 | return (v == SEQ_START_TOKEN) ? | |
3fa87a32 | 3699 | sk_head(&net_pfkey->table) : |
bd2f7476 PE |
3700 | sk_next((struct sock *)v); |
3701 | } | |
1da177e4 | 3702 | |
bd2f7476 PE |
3703 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
3704 | { | |
3705 | read_unlock(&pfkey_table_lock); | |
3706 | } | |
1da177e4 | 3707 | |
98147d52 | 3708 | static const struct seq_operations pfkey_seq_ops = { |
bd2f7476 PE |
3709 | .start = pfkey_seq_start, |
3710 | .next = pfkey_seq_next, | |
3711 | .stop = pfkey_seq_stop, | |
3712 | .show = pfkey_seq_show, | |
3713 | }; | |
1da177e4 | 3714 | |
bd2f7476 PE |
3715 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3716 | { | |
7013ec30 AD |
3717 | return seq_open_net(inode, file, &pfkey_seq_ops, |
3718 | sizeof(struct seq_net_private)); | |
1da177e4 | 3719 | } |
61145aa1 | 3720 | |
bd2f7476 PE |
3721 | static struct file_operations pfkey_proc_ops = { |
3722 | .open = pfkey_seq_open, | |
3723 | .read = seq_read, | |
3724 | .llseek = seq_lseek, | |
7013ec30 | 3725 | .release = seq_release_net, |
bd2f7476 PE |
3726 | }; |
3727 | ||
7013ec30 | 3728 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 | 3729 | { |
bd2f7476 PE |
3730 | struct proc_dir_entry *e; |
3731 | ||
7013ec30 | 3732 | e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops); |
bd2f7476 | 3733 | if (e == NULL) |
61145aa1 | 3734 | return -ENOMEM; |
bd2f7476 | 3735 | |
bd2f7476 | 3736 | return 0; |
61145aa1 PE |
3737 | } |
3738 | ||
7013ec30 | 3739 | static void pfkey_exit_proc(struct net *net) |
61145aa1 | 3740 | { |
7013ec30 | 3741 | proc_net_remove(net, "pfkey"); |
61145aa1 PE |
3742 | } |
3743 | #else | |
7013ec30 | 3744 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 PE |
3745 | { |
3746 | return 0; | |
3747 | } | |
3748 | ||
7013ec30 | 3749 | static void pfkey_exit_proc(struct net *net) |
61145aa1 PE |
3750 | { |
3751 | } | |
1da177e4 LT |
3752 | #endif |
3753 | ||
3754 | static struct xfrm_mgr pfkeyv2_mgr = | |
3755 | { | |
3756 | .id = "pfkeyv2", | |
3757 | .notify = pfkey_send_notify, | |
3758 | .acquire = pfkey_send_acquire, | |
3759 | .compile_policy = pfkey_compile_policy, | |
3760 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3761 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3762 | .migrate = pfkey_send_migrate, |
1da177e4 LT |
3763 | }; |
3764 | ||
3fa87a32 AD |
3765 | static int __net_init pfkey_net_init(struct net *net) |
3766 | { | |
3767 | struct netns_pfkey *net_pfkey; | |
3768 | int rv; | |
3769 | ||
3770 | net_pfkey = kmalloc(sizeof(struct netns_pfkey), GFP_KERNEL); | |
3771 | if (!net_pfkey) { | |
3772 | rv = -ENOMEM; | |
3773 | goto out_kmalloc; | |
3774 | } | |
3775 | INIT_HLIST_HEAD(&net_pfkey->table); | |
3776 | atomic_set(&net_pfkey->socks_nr, 0); | |
3777 | rv = net_assign_generic(net, pfkey_net_id, net_pfkey); | |
3778 | if (rv < 0) | |
3779 | goto out_assign; | |
7013ec30 AD |
3780 | rv = pfkey_init_proc(net); |
3781 | if (rv < 0) | |
3782 | goto out_proc; | |
3fa87a32 AD |
3783 | return 0; |
3784 | ||
7013ec30 | 3785 | out_proc: |
3fa87a32 AD |
3786 | out_assign: |
3787 | kfree(net_pfkey); | |
3788 | out_kmalloc: | |
3789 | return rv; | |
3790 | } | |
3791 | ||
3792 | static void __net_exit pfkey_net_exit(struct net *net) | |
3793 | { | |
3794 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
3795 | ||
7013ec30 | 3796 | pfkey_exit_proc(net); |
3fa87a32 AD |
3797 | BUG_ON(!hlist_empty(&net_pfkey->table)); |
3798 | kfree(net_pfkey); | |
3799 | } | |
3800 | ||
3801 | static struct pernet_operations pfkey_net_ops = { | |
3802 | .init = pfkey_net_init, | |
3803 | .exit = pfkey_net_exit, | |
3804 | }; | |
3805 | ||
1da177e4 LT |
3806 | static void __exit ipsec_pfkey_exit(void) |
3807 | { | |
3fa87a32 | 3808 | unregister_pernet_gen_subsys(pfkey_net_id, &pfkey_net_ops); |
1da177e4 | 3809 | xfrm_unregister_km(&pfkeyv2_mgr); |
1da177e4 LT |
3810 | sock_unregister(PF_KEY); |
3811 | proto_unregister(&key_proto); | |
3812 | } | |
3813 | ||
3814 | static int __init ipsec_pfkey_init(void) | |
3815 | { | |
3816 | int err = proto_register(&key_proto, 0); | |
3817 | ||
3818 | if (err != 0) | |
3819 | goto out; | |
3820 | ||
3821 | err = sock_register(&pfkey_family_ops); | |
3822 | if (err != 0) | |
3823 | goto out_unregister_key_proto; | |
1da177e4 LT |
3824 | err = xfrm_register_km(&pfkeyv2_mgr); |
3825 | if (err != 0) | |
7013ec30 | 3826 | goto out_sock_unregister; |
3fa87a32 AD |
3827 | err = register_pernet_gen_subsys(&pfkey_net_id, &pfkey_net_ops); |
3828 | if (err != 0) | |
3829 | goto out_xfrm_unregister_km; | |
1da177e4 LT |
3830 | out: |
3831 | return err; | |
3fa87a32 AD |
3832 | out_xfrm_unregister_km: |
3833 | xfrm_unregister_km(&pfkeyv2_mgr); | |
1da177e4 | 3834 | out_sock_unregister: |
1da177e4 LT |
3835 | sock_unregister(PF_KEY); |
3836 | out_unregister_key_proto: | |
3837 | proto_unregister(&key_proto); | |
3838 | goto out; | |
3839 | } | |
3840 | ||
3841 | module_init(ipsec_pfkey_init); | |
3842 | module_exit(ipsec_pfkey_exit); | |
3843 | MODULE_LICENSE("GPL"); | |
3844 | MODULE_ALIAS_NETPROTO(PF_KEY); |