Commit | Line | Data |
---|---|---|
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> |
1da177e4 LT |
30 | #include <net/xfrm.h> |
31 | ||
32 | #include <net/sock.h> | |
33 | ||
34 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) | |
35 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) | |
36 | ||
37 | ||
38 | /* List of all pfkey sockets. */ | |
39 | static HLIST_HEAD(pfkey_table); | |
40 | static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); | |
41 | static DEFINE_RWLOCK(pfkey_table_lock); | |
42 | static atomic_t pfkey_table_users = ATOMIC_INIT(0); | |
43 | ||
44 | static atomic_t pfkey_socks_nr = ATOMIC_INIT(0); | |
45 | ||
46 | struct pfkey_sock { | |
47 | /* struct sock must be the first member of struct pfkey_sock */ | |
48 | struct sock sk; | |
49 | int registered; | |
50 | int promisc; | |
83321d6b TT |
51 | |
52 | struct { | |
53 | uint8_t msg_version; | |
54 | uint32_t msg_pid; | |
55 | int (*dump)(struct pfkey_sock *sk); | |
56 | void (*done)(struct pfkey_sock *sk); | |
57 | union { | |
58 | struct xfrm_policy_walk policy; | |
59 | struct xfrm_state_walk state; | |
60 | } u; | |
61 | } dump; | |
1da177e4 LT |
62 | }; |
63 | ||
64 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) | |
65 | { | |
66 | return (struct pfkey_sock *)sk; | |
67 | } | |
68 | ||
83321d6b TT |
69 | static int pfkey_can_dump(struct sock *sk) |
70 | { | |
71 | if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) | |
72 | return 1; | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static int pfkey_do_dump(struct pfkey_sock *pfk) | |
77 | { | |
78 | int rc; | |
79 | ||
80 | rc = pfk->dump.dump(pfk); | |
81 | if (rc == -ENOBUFS) | |
82 | return 0; | |
83 | ||
84 | pfk->dump.done(pfk); | |
85 | pfk->dump.dump = NULL; | |
86 | pfk->dump.done = NULL; | |
87 | return rc; | |
88 | } | |
89 | ||
1da177e4 LT |
90 | static void pfkey_sock_destruct(struct sock *sk) |
91 | { | |
92 | skb_queue_purge(&sk->sk_receive_queue); | |
93 | ||
94 | if (!sock_flag(sk, SOCK_DEAD)) { | |
95 | printk("Attempt to release alive pfkey socket: %p\n", sk); | |
96 | return; | |
97 | } | |
98 | ||
99 | BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc)); | |
100 | BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc)); | |
101 | ||
102 | atomic_dec(&pfkey_socks_nr); | |
103 | } | |
104 | ||
105 | static void pfkey_table_grab(void) | |
106 | { | |
107 | write_lock_bh(&pfkey_table_lock); | |
108 | ||
109 | if (atomic_read(&pfkey_table_users)) { | |
110 | DECLARE_WAITQUEUE(wait, current); | |
111 | ||
112 | add_wait_queue_exclusive(&pfkey_table_wait, &wait); | |
113 | for(;;) { | |
114 | set_current_state(TASK_UNINTERRUPTIBLE); | |
115 | if (atomic_read(&pfkey_table_users) == 0) | |
116 | break; | |
117 | write_unlock_bh(&pfkey_table_lock); | |
118 | schedule(); | |
119 | write_lock_bh(&pfkey_table_lock); | |
120 | } | |
121 | ||
122 | __set_current_state(TASK_RUNNING); | |
123 | remove_wait_queue(&pfkey_table_wait, &wait); | |
124 | } | |
125 | } | |
126 | ||
127 | static __inline__ void pfkey_table_ungrab(void) | |
128 | { | |
129 | write_unlock_bh(&pfkey_table_lock); | |
130 | wake_up(&pfkey_table_wait); | |
131 | } | |
132 | ||
133 | static __inline__ void pfkey_lock_table(void) | |
134 | { | |
135 | /* read_lock() synchronizes us to pfkey_table_grab */ | |
136 | ||
137 | read_lock(&pfkey_table_lock); | |
138 | atomic_inc(&pfkey_table_users); | |
139 | read_unlock(&pfkey_table_lock); | |
140 | } | |
141 | ||
142 | static __inline__ void pfkey_unlock_table(void) | |
143 | { | |
144 | if (atomic_dec_and_test(&pfkey_table_users)) | |
145 | wake_up(&pfkey_table_wait); | |
146 | } | |
147 | ||
148 | ||
90ddc4f0 | 149 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
150 | |
151 | static void pfkey_insert(struct sock *sk) | |
152 | { | |
153 | pfkey_table_grab(); | |
154 | sk_add_node(sk, &pfkey_table); | |
155 | pfkey_table_ungrab(); | |
156 | } | |
157 | ||
158 | static void pfkey_remove(struct sock *sk) | |
159 | { | |
160 | pfkey_table_grab(); | |
161 | sk_del_node_init(sk); | |
162 | pfkey_table_ungrab(); | |
163 | } | |
164 | ||
165 | static struct proto key_proto = { | |
166 | .name = "KEY", | |
167 | .owner = THIS_MODULE, | |
168 | .obj_size = sizeof(struct pfkey_sock), | |
169 | }; | |
170 | ||
1b8d7ae4 | 171 | static int pfkey_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
172 | { |
173 | struct sock *sk; | |
174 | int err; | |
175 | ||
1b8d7ae4 EB |
176 | if (net != &init_net) |
177 | return -EAFNOSUPPORT; | |
178 | ||
1da177e4 LT |
179 | if (!capable(CAP_NET_ADMIN)) |
180 | return -EPERM; | |
181 | if (sock->type != SOCK_RAW) | |
182 | return -ESOCKTNOSUPPORT; | |
183 | if (protocol != PF_KEY_V2) | |
184 | return -EPROTONOSUPPORT; | |
185 | ||
186 | err = -ENOMEM; | |
6257ff21 | 187 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto); |
1da177e4 LT |
188 | if (sk == NULL) |
189 | goto out; | |
8ff24541 | 190 | |
1da177e4 LT |
191 | sock->ops = &pfkey_ops; |
192 | sock_init_data(sock, sk); | |
193 | ||
194 | sk->sk_family = PF_KEY; | |
195 | sk->sk_destruct = pfkey_sock_destruct; | |
196 | ||
197 | atomic_inc(&pfkey_socks_nr); | |
198 | ||
199 | pfkey_insert(sk); | |
200 | ||
201 | return 0; | |
202 | out: | |
203 | return err; | |
204 | } | |
205 | ||
206 | static int pfkey_release(struct socket *sock) | |
207 | { | |
208 | struct sock *sk = sock->sk; | |
209 | ||
210 | if (!sk) | |
211 | return 0; | |
212 | ||
213 | pfkey_remove(sk); | |
214 | ||
215 | sock_orphan(sk); | |
216 | sock->sk = NULL; | |
217 | skb_queue_purge(&sk->sk_write_queue); | |
218 | sock_put(sk); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | |
dd0fc66f | 224 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
225 | { |
226 | int err = -ENOBUFS; | |
227 | ||
228 | sock_hold(sk); | |
229 | if (*skb2 == NULL) { | |
230 | if (atomic_read(&skb->users) != 1) { | |
231 | *skb2 = skb_clone(skb, allocation); | |
232 | } else { | |
233 | *skb2 = skb; | |
234 | atomic_inc(&skb->users); | |
235 | } | |
236 | } | |
237 | if (*skb2 != NULL) { | |
238 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { | |
239 | skb_orphan(*skb2); | |
240 | skb_set_owner_r(*skb2, sk); | |
241 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | |
242 | sk->sk_data_ready(sk, (*skb2)->len); | |
243 | *skb2 = NULL; | |
244 | err = 0; | |
245 | } | |
246 | } | |
247 | sock_put(sk); | |
248 | return err; | |
249 | } | |
250 | ||
251 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
252 | #define BROADCAST_ALL 0 | |
253 | #define BROADCAST_ONE 1 | |
254 | #define BROADCAST_REGISTERED 2 | |
255 | #define BROADCAST_PROMISC_ONLY 4 | |
dd0fc66f | 256 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
1da177e4 LT |
257 | int broadcast_flags, struct sock *one_sk) |
258 | { | |
259 | struct sock *sk; | |
260 | struct hlist_node *node; | |
261 | struct sk_buff *skb2 = NULL; | |
262 | int err = -ESRCH; | |
263 | ||
264 | /* XXX Do we need something like netlink_overrun? I think | |
265 | * XXX PF_KEY socket apps will not mind current behavior. | |
266 | */ | |
267 | if (!skb) | |
268 | return -ENOMEM; | |
269 | ||
270 | pfkey_lock_table(); | |
271 | sk_for_each(sk, node, &pfkey_table) { | |
272 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
273 | int err2; | |
274 | ||
275 | /* Yes, it means that if you are meant to receive this | |
276 | * pfkey message you receive it twice as promiscuous | |
277 | * socket. | |
278 | */ | |
279 | if (pfk->promisc) | |
280 | pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
281 | ||
282 | /* the exact target will be processed later */ | |
283 | if (sk == one_sk) | |
284 | continue; | |
285 | if (broadcast_flags != BROADCAST_ALL) { | |
286 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
287 | continue; | |
288 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
289 | !pfk->registered) | |
290 | continue; | |
291 | if (broadcast_flags & BROADCAST_ONE) | |
292 | continue; | |
293 | } | |
294 | ||
295 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
296 | ||
297 | /* Error is cleare after succecful sending to at least one | |
298 | * registered KM */ | |
299 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
300 | err = err2; | |
301 | } | |
302 | pfkey_unlock_table(); | |
303 | ||
304 | if (one_sk != NULL) | |
305 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | |
306 | ||
307 | if (skb2) | |
308 | kfree_skb(skb2); | |
309 | kfree_skb(skb); | |
310 | return err; | |
311 | } | |
312 | ||
313 | static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) | |
314 | { | |
315 | *new = *orig; | |
316 | } | |
317 | ||
318 | static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) | |
319 | { | |
320 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
321 | struct sadb_msg *hdr; | |
322 | ||
323 | if (!skb) | |
324 | return -ENOBUFS; | |
325 | ||
326 | /* Woe be to the platform trying to support PFKEY yet | |
327 | * having normal errnos outside the 1-255 range, inclusive. | |
328 | */ | |
329 | err = -err; | |
330 | if (err == ERESTARTSYS || | |
331 | err == ERESTARTNOHAND || | |
332 | err == ERESTARTNOINTR) | |
333 | err = EINTR; | |
334 | if (err >= 512) | |
335 | err = EINVAL; | |
09a62660 | 336 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
337 | |
338 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
339 | pfkey_hdr_dup(hdr, orig); | |
340 | hdr->sadb_msg_errno = (uint8_t) err; | |
341 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
342 | sizeof(uint64_t)); | |
343 | ||
344 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | static u8 sadb_ext_min_len[] = { | |
350 | [SADB_EXT_RESERVED] = (u8) 0, | |
351 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
352 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
353 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
354 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
355 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
356 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
357 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
358 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
359 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
360 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
361 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
362 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
363 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
364 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
365 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
366 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
367 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
368 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
369 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
370 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
371 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
372 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
373 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 374 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
1da177e4 LT |
375 | }; |
376 | ||
377 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
378 | static int verify_address_len(void *p) | |
379 | { | |
380 | struct sadb_address *sp = p; | |
381 | struct sockaddr *addr = (struct sockaddr *)(sp + 1); | |
382 | struct sockaddr_in *sin; | |
383 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
384 | struct sockaddr_in6 *sin6; | |
385 | #endif | |
386 | int len; | |
387 | ||
388 | switch (addr->sa_family) { | |
389 | case AF_INET: | |
356f89e1 | 390 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
391 | if (sp->sadb_address_len != len || |
392 | sp->sadb_address_prefixlen > 32) | |
393 | return -EINVAL; | |
394 | break; | |
395 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
396 | case AF_INET6: | |
356f89e1 | 397 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
398 | if (sp->sadb_address_len != len || |
399 | sp->sadb_address_prefixlen > 128) | |
400 | return -EINVAL; | |
401 | break; | |
402 | #endif | |
403 | default: | |
404 | /* It is user using kernel to keep track of security | |
405 | * associations for another protocol, such as | |
406 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
407 | * lengths. | |
408 | * | |
409 | * XXX Actually, association/policy database is not yet | |
410 | * XXX able to cope with arbitrary sockaddr families. | |
411 | * XXX When it can, remove this -EINVAL. -DaveM | |
412 | */ | |
413 | return -EINVAL; | |
414 | break; | |
3ff50b79 | 415 | } |
1da177e4 LT |
416 | |
417 | return 0; | |
418 | } | |
419 | ||
df71837d TJ |
420 | static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) |
421 | { | |
356f89e1 IJ |
422 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
423 | sec_ctx->sadb_x_ctx_len, | |
424 | sizeof(uint64_t)); | |
df71837d TJ |
425 | } |
426 | ||
427 | static inline int verify_sec_ctx_len(void *p) | |
428 | { | |
429 | struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; | |
298bb621 | 430 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 431 | |
298bb621 | 432 | if (len > PAGE_SIZE) |
df71837d TJ |
433 | return -EINVAL; |
434 | ||
435 | len = pfkey_sec_ctx_len(sec_ctx); | |
436 | ||
437 | if (sec_ctx->sadb_x_sec_len != len) | |
438 | return -EINVAL; | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
443 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) | |
444 | { | |
445 | struct xfrm_user_sec_ctx *uctx = NULL; | |
446 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
447 | ||
448 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); | |
449 | ||
450 | if (!uctx) | |
451 | return NULL; | |
452 | ||
453 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
454 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
455 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
456 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
457 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
458 | memcpy(uctx + 1, sec_ctx + 1, | |
459 | uctx->ctx_len); | |
460 | ||
461 | return uctx; | |
462 | } | |
463 | ||
1da177e4 LT |
464 | static int present_and_same_family(struct sadb_address *src, |
465 | struct sadb_address *dst) | |
466 | { | |
467 | struct sockaddr *s_addr, *d_addr; | |
468 | ||
469 | if (!src || !dst) | |
470 | return 0; | |
471 | ||
472 | s_addr = (struct sockaddr *)(src + 1); | |
473 | d_addr = (struct sockaddr *)(dst + 1); | |
474 | if (s_addr->sa_family != d_addr->sa_family) | |
475 | return 0; | |
476 | if (s_addr->sa_family != AF_INET | |
477 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
478 | && s_addr->sa_family != AF_INET6 | |
479 | #endif | |
480 | ) | |
481 | return 0; | |
482 | ||
483 | return 1; | |
484 | } | |
485 | ||
486 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
487 | { | |
488 | char *p = (char *) hdr; | |
489 | int len = skb->len; | |
490 | ||
491 | len -= sizeof(*hdr); | |
492 | p += sizeof(*hdr); | |
493 | while (len > 0) { | |
494 | struct sadb_ext *ehdr = (struct sadb_ext *) p; | |
495 | uint16_t ext_type; | |
496 | int ext_len; | |
497 | ||
498 | ext_len = ehdr->sadb_ext_len; | |
499 | ext_len *= sizeof(uint64_t); | |
500 | ext_type = ehdr->sadb_ext_type; | |
501 | if (ext_len < sizeof(uint64_t) || | |
502 | ext_len > len || | |
503 | ext_type == SADB_EXT_RESERVED) | |
504 | return -EINVAL; | |
505 | ||
506 | if (ext_type <= SADB_EXT_MAX) { | |
507 | int min = (int) sadb_ext_min_len[ext_type]; | |
508 | if (ext_len < min) | |
509 | return -EINVAL; | |
510 | if (ext_hdrs[ext_type-1] != NULL) | |
511 | return -EINVAL; | |
512 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
513 | ext_type == SADB_EXT_ADDRESS_DST || | |
514 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
515 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
516 | if (verify_address_len(p)) | |
517 | return -EINVAL; | |
8ff24541 | 518 | } |
df71837d TJ |
519 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
520 | if (verify_sec_ctx_len(p)) | |
521 | return -EINVAL; | |
522 | } | |
1da177e4 LT |
523 | ext_hdrs[ext_type-1] = p; |
524 | } | |
525 | p += ext_len; | |
526 | len -= ext_len; | |
527 | } | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static uint16_t | |
533 | pfkey_satype2proto(uint8_t satype) | |
534 | { | |
535 | switch (satype) { | |
536 | case SADB_SATYPE_UNSPEC: | |
537 | return IPSEC_PROTO_ANY; | |
538 | case SADB_SATYPE_AH: | |
539 | return IPPROTO_AH; | |
540 | case SADB_SATYPE_ESP: | |
541 | return IPPROTO_ESP; | |
542 | case SADB_X_SATYPE_IPCOMP: | |
543 | return IPPROTO_COMP; | |
544 | break; | |
545 | default: | |
546 | return 0; | |
547 | } | |
548 | /* NOTREACHED */ | |
549 | } | |
550 | ||
551 | static uint8_t | |
552 | pfkey_proto2satype(uint16_t proto) | |
553 | { | |
554 | switch (proto) { | |
555 | case IPPROTO_AH: | |
556 | return SADB_SATYPE_AH; | |
557 | case IPPROTO_ESP: | |
558 | return SADB_SATYPE_ESP; | |
559 | case IPPROTO_COMP: | |
560 | return SADB_X_SATYPE_IPCOMP; | |
561 | break; | |
562 | default: | |
563 | return 0; | |
564 | } | |
565 | /* NOTREACHED */ | |
566 | } | |
567 | ||
568 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
569 | * say specifically 'just raw sockets' as we encode them as 255. | |
570 | */ | |
571 | ||
572 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
573 | { | |
574 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); | |
575 | } | |
576 | ||
577 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
578 | { | |
579 | return (proto ? proto : IPSEC_PROTO_ANY); | |
580 | } | |
581 | ||
9e8b4ed8 YH |
582 | static inline int pfkey_sockaddr_len(sa_family_t family) |
583 | { | |
584 | switch (family) { | |
585 | case AF_INET: | |
586 | return sizeof(struct sockaddr_in); | |
587 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
588 | case AF_INET6: | |
589 | return sizeof(struct sockaddr_in6); | |
590 | #endif | |
591 | } | |
592 | return 0; | |
593 | } | |
594 | ||
5f95ac91 YH |
595 | static |
596 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 597 | { |
5f95ac91 | 598 | switch (sa->sa_family) { |
1da177e4 | 599 | case AF_INET: |
8ff24541 | 600 | xaddr->a4 = |
5f95ac91 | 601 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 LT |
602 | return AF_INET; |
603 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
604 | case AF_INET6: | |
8ff24541 | 605 | memcpy(xaddr->a6, |
5f95ac91 | 606 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
607 | sizeof(struct in6_addr)); |
608 | return AF_INET6; | |
609 | #endif | |
1da177e4 | 610 | } |
5f95ac91 YH |
611 | return 0; |
612 | } | |
613 | ||
614 | static | |
615 | int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr) | |
616 | { | |
617 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
618 | xaddr); | |
1da177e4 LT |
619 | } |
620 | ||
621 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) | |
622 | { | |
623 | struct sadb_sa *sa; | |
624 | struct sadb_address *addr; | |
625 | uint16_t proto; | |
626 | unsigned short family; | |
627 | xfrm_address_t *xaddr; | |
628 | ||
629 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
630 | if (sa == NULL) | |
631 | return NULL; | |
632 | ||
633 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
634 | if (proto == 0) | |
635 | return NULL; | |
636 | ||
637 | /* sadb_address_len should be checked by caller */ | |
638 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
639 | if (addr == NULL) | |
640 | return NULL; | |
641 | ||
642 | family = ((struct sockaddr *)(addr + 1))->sa_family; | |
643 | switch (family) { | |
644 | case AF_INET: | |
645 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; | |
646 | break; | |
647 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
648 | case AF_INET6: | |
649 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; | |
650 | break; | |
651 | #endif | |
652 | default: | |
653 | xaddr = NULL; | |
654 | } | |
655 | ||
656 | if (!xaddr) | |
657 | return NULL; | |
658 | ||
659 | return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); | |
660 | } | |
661 | ||
662 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 663 | |
1da177e4 LT |
664 | static int |
665 | pfkey_sockaddr_size(sa_family_t family) | |
666 | { | |
9e8b4ed8 | 667 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
668 | } |
669 | ||
55569ce2 KM |
670 | static inline int pfkey_mode_from_xfrm(int mode) |
671 | { | |
672 | switch(mode) { | |
673 | case XFRM_MODE_TRANSPORT: | |
674 | return IPSEC_MODE_TRANSPORT; | |
675 | case XFRM_MODE_TUNNEL: | |
676 | return IPSEC_MODE_TUNNEL; | |
677 | case XFRM_MODE_BEET: | |
678 | return IPSEC_MODE_BEET; | |
679 | default: | |
680 | return -1; | |
681 | } | |
682 | } | |
683 | ||
684 | static inline int pfkey_mode_to_xfrm(int mode) | |
685 | { | |
686 | switch(mode) { | |
687 | case IPSEC_MODE_ANY: /*XXX*/ | |
688 | case IPSEC_MODE_TRANSPORT: | |
689 | return XFRM_MODE_TRANSPORT; | |
690 | case IPSEC_MODE_TUNNEL: | |
691 | return XFRM_MODE_TUNNEL; | |
692 | case IPSEC_MODE_BEET: | |
693 | return XFRM_MODE_BEET; | |
694 | default: | |
695 | return -1; | |
696 | } | |
697 | } | |
698 | ||
e5b56652 YH |
699 | static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port, |
700 | struct sockaddr *sa, | |
701 | unsigned short family) | |
702 | { | |
703 | switch (family) { | |
704 | case AF_INET: | |
705 | { | |
706 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
707 | sin->sin_family = AF_INET; | |
708 | sin->sin_port = port; | |
709 | sin->sin_addr.s_addr = xaddr->a4; | |
710 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
711 | return 32; | |
712 | } | |
713 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
714 | case AF_INET6: | |
715 | { | |
716 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
717 | sin6->sin6_family = AF_INET6; | |
718 | sin6->sin6_port = port; | |
719 | sin6->sin6_flowinfo = 0; | |
720 | ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6); | |
721 | sin6->sin6_scope_id = 0; | |
722 | return 128; | |
723 | } | |
724 | #endif | |
725 | } | |
726 | return 0; | |
727 | } | |
728 | ||
050f009e HX |
729 | static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x, |
730 | int add_keys, int hsc) | |
1da177e4 LT |
731 | { |
732 | struct sk_buff *skb; | |
733 | struct sadb_msg *hdr; | |
734 | struct sadb_sa *sa; | |
735 | struct sadb_lifetime *lifetime; | |
736 | struct sadb_address *addr; | |
737 | struct sadb_key *key; | |
738 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
739 | struct sadb_x_sec_ctx *sec_ctx; |
740 | struct xfrm_sec_ctx *xfrm_ctx; | |
741 | int ctx_size = 0; | |
1da177e4 LT |
742 | int size; |
743 | int auth_key_size = 0; | |
744 | int encrypt_key_size = 0; | |
745 | int sockaddr_size; | |
746 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 747 | int mode; |
1da177e4 LT |
748 | |
749 | /* address family check */ | |
750 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
751 | if (!sockaddr_size) | |
752 | return ERR_PTR(-EINVAL); | |
753 | ||
754 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
755 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 756 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
757 | sizeof(struct sadb_lifetime) + |
758 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
759 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 760 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
761 | sockaddr_size*2 + |
762 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
763 | |
764 | if ((xfrm_ctx = x->security)) { | |
765 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
766 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
767 | } | |
768 | ||
1da177e4 | 769 | /* identity & sensitivity */ |
81b302a3 | 770 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
771 | size += sizeof(struct sadb_address) + sockaddr_size; |
772 | ||
773 | if (add_keys) { | |
774 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
775 | auth_key_size = |
776 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
777 | size += sizeof(struct sadb_key) + auth_key_size; |
778 | } | |
779 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
780 | encrypt_key_size = |
781 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
782 | size += sizeof(struct sadb_key) + encrypt_key_size; |
783 | } | |
784 | } | |
785 | if (x->encap) | |
786 | natt = x->encap; | |
787 | ||
788 | if (natt && natt->encap_type) { | |
789 | size += sizeof(struct sadb_x_nat_t_type); | |
790 | size += sizeof(struct sadb_x_nat_t_port); | |
791 | size += sizeof(struct sadb_x_nat_t_port); | |
792 | } | |
793 | ||
794 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
795 | if (skb == NULL) | |
796 | return ERR_PTR(-ENOBUFS); | |
797 | ||
798 | /* call should fill header later */ | |
799 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
800 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
801 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
802 | ||
803 | /* sa */ | |
804 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
805 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
806 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
807 | sa->sadb_sa_spi = x->id.spi; | |
808 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
809 | switch (x->km.state) { |
810 | case XFRM_STATE_VALID: | |
811 | sa->sadb_sa_state = x->km.dying ? | |
812 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
813 | break; | |
814 | case XFRM_STATE_ACQ: | |
1da177e4 | 815 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
816 | break; |
817 | default: | |
1da177e4 | 818 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
819 | break; |
820 | } | |
1da177e4 LT |
821 | sa->sadb_sa_auth = 0; |
822 | if (x->aalg) { | |
823 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
824 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | |
825 | } | |
826 | sa->sadb_sa_encrypt = 0; | |
827 | BUG_ON(x->ealg && x->calg); | |
828 | if (x->ealg) { | |
829 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
830 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
831 | } | |
832 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
833 | if (x->calg) { | |
834 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
835 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
836 | } | |
837 | ||
838 | sa->sadb_sa_flags = 0; | |
839 | if (x->props.flags & XFRM_STATE_NOECN) | |
840 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
841 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
842 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
843 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
844 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
845 | |
846 | /* hard time */ | |
847 | if (hsc & 2) { | |
8ff24541 | 848 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
849 | sizeof(struct sadb_lifetime)); |
850 | lifetime->sadb_lifetime_len = | |
851 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
852 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
853 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
854 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
855 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
856 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
857 | } | |
858 | /* soft time */ | |
859 | if (hsc & 1) { | |
8ff24541 | 860 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
861 | sizeof(struct sadb_lifetime)); |
862 | lifetime->sadb_lifetime_len = | |
863 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
864 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
865 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
866 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
867 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
868 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
869 | } | |
870 | /* current time */ | |
871 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
872 | sizeof(struct sadb_lifetime)); | |
873 | lifetime->sadb_lifetime_len = | |
874 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
875 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
876 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
877 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
878 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
879 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
880 | /* src address */ | |
8ff24541 | 881 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 882 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 883 | addr->sadb_address_len = |
1da177e4 LT |
884 | (sizeof(struct sadb_address)+sockaddr_size)/ |
885 | sizeof(uint64_t); | |
886 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
887 | /* "if the ports are non-zero, then the sadb_address_proto field, |
888 | normally zero, MUST be filled in with the transport | |
1da177e4 | 889 | protocol's number." - RFC2367 */ |
8ff24541 | 890 | addr->sadb_address_proto = 0; |
1da177e4 | 891 | addr->sadb_address_reserved = 0; |
1da177e4 | 892 | |
e5b56652 YH |
893 | addr->sadb_address_prefixlen = |
894 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
895 | (struct sockaddr *) (addr + 1), | |
896 | x->props.family); | |
897 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
898 | BUG(); |
899 | ||
900 | /* dst address */ | |
8ff24541 | 901 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 902 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 903 | addr->sadb_address_len = |
1da177e4 LT |
904 | (sizeof(struct sadb_address)+sockaddr_size)/ |
905 | sizeof(uint64_t); | |
906 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 907 | addr->sadb_address_proto = 0; |
1da177e4 | 908 | addr->sadb_address_reserved = 0; |
1da177e4 | 909 | |
e5b56652 YH |
910 | addr->sadb_address_prefixlen = |
911 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
912 | (struct sockaddr *) (addr + 1), | |
913 | x->props.family); | |
914 | if (!addr->sadb_address_prefixlen) | |
915 | BUG(); | |
1da177e4 | 916 | |
e5b56652 YH |
917 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, |
918 | x->props.family)) { | |
919 | addr = (struct sadb_address*) skb_put(skb, | |
920 | sizeof(struct sadb_address)+sockaddr_size); | |
921 | addr->sadb_address_len = | |
922 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
923 | sizeof(uint64_t); | |
924 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
925 | addr->sadb_address_proto = | |
926 | pfkey_proto_from_xfrm(x->sel.proto); | |
927 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
928 | addr->sadb_address_reserved = 0; | |
1da177e4 | 929 | |
e5b56652 YH |
930 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
931 | (struct sockaddr *) (addr + 1), | |
932 | x->props.family); | |
1da177e4 | 933 | } |
1da177e4 LT |
934 | |
935 | /* auth key */ | |
936 | if (add_keys && auth_key_size) { | |
8ff24541 | 937 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 LT |
938 | sizeof(struct sadb_key)+auth_key_size); |
939 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
940 | sizeof(uint64_t); | |
941 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
942 | key->sadb_key_bits = x->aalg->alg_key_len; | |
943 | key->sadb_key_reserved = 0; | |
944 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
945 | } | |
946 | /* encrypt key */ | |
947 | if (add_keys && encrypt_key_size) { | |
8ff24541 | 948 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 | 949 | sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541 | 950 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
951 | encrypt_key_size) / sizeof(uint64_t); |
952 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
953 | key->sadb_key_bits = x->ealg->alg_key_len; | |
954 | key->sadb_key_reserved = 0; | |
8ff24541 | 955 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
956 | (x->ealg->alg_key_len+7)/8); |
957 | } | |
958 | ||
959 | /* sa */ | |
960 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
961 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
962 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
963 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
964 | kfree_skb(skb); | |
965 | return ERR_PTR(-EINVAL); | |
966 | } | |
967 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
968 | sa2->sadb_x_sa2_reserved1 = 0; |
969 | sa2->sadb_x_sa2_reserved2 = 0; | |
970 | sa2->sadb_x_sa2_sequence = 0; | |
971 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
972 | ||
973 | if (natt && natt->encap_type) { | |
974 | struct sadb_x_nat_t_type *n_type; | |
975 | struct sadb_x_nat_t_port *n_port; | |
976 | ||
977 | /* type */ | |
978 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
979 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
980 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
981 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
982 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
983 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
984 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
985 | ||
986 | /* source port */ | |
987 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
988 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
989 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
990 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
991 | n_port->sadb_x_nat_t_port_reserved = 0; | |
992 | ||
993 | /* dest port */ | |
994 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
995 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
996 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
997 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
998 | n_port->sadb_x_nat_t_port_reserved = 0; | |
999 | } | |
1000 | ||
df71837d TJ |
1001 | /* security context */ |
1002 | if (xfrm_ctx) { | |
1003 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
1004 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
1005 | sec_ctx->sadb_x_sec_len = | |
1006 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1007 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1008 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1009 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1010 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1011 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1012 | xfrm_ctx->ctx_len); | |
1013 | } | |
1014 | ||
1da177e4 LT |
1015 | return skb; |
1016 | } | |
1017 | ||
050f009e HX |
1018 | |
1019 | static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x) | |
1020 | { | |
1021 | struct sk_buff *skb; | |
1022 | ||
050f009e | 1023 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1024 | |
1025 | return skb; | |
1026 | } | |
1027 | ||
1028 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x, | |
1029 | int hsc) | |
1030 | { | |
1031 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1032 | } | |
1033 | ||
8ff24541 | 1034 | static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, |
1da177e4 LT |
1035 | void **ext_hdrs) |
1036 | { | |
8ff24541 | 1037 | struct xfrm_state *x; |
1da177e4 LT |
1038 | struct sadb_lifetime *lifetime; |
1039 | struct sadb_sa *sa; | |
1040 | struct sadb_key *key; | |
df71837d | 1041 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
1042 | uint16_t proto; |
1043 | int err; | |
8ff24541 | 1044 | |
1da177e4 LT |
1045 | |
1046 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
1047 | if (!sa || | |
1048 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1049 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1050 | return ERR_PTR(-EINVAL); | |
1051 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1052 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1053 | return ERR_PTR(-EINVAL); | |
1054 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1055 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1056 | return ERR_PTR(-EINVAL); | |
1057 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1058 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1059 | return ERR_PTR(-EINVAL); | |
1060 | ||
1061 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1062 | if (proto == 0) | |
1063 | return ERR_PTR(-EINVAL); | |
1064 | ||
1065 | /* default error is no buffer space */ | |
1066 | err = -ENOBUFS; | |
1067 | ||
1068 | /* RFC2367: | |
1069 | ||
1070 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1071 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1072 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1073 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1074 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1075 | not true. | |
1076 | ||
8ff24541 | 1077 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1078 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1079 | */ | |
1080 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1081 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1082 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1083 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1084 | return ERR_PTR(-EINVAL); | |
1085 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | |
1086 | if (key != NULL && | |
1087 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1088 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1089 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1090 | return ERR_PTR(-EINVAL); | |
1091 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1092 | if (key != NULL && | |
1093 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1094 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1095 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1096 | return ERR_PTR(-EINVAL); | |
1097 | ||
1098 | x = xfrm_state_alloc(); | |
1099 | if (x == NULL) | |
1100 | return ERR_PTR(-ENOBUFS); | |
1101 | ||
1102 | x->id.proto = proto; | |
1103 | x->id.spi = sa->sadb_sa_spi; | |
1104 | x->props.replay_window = sa->sadb_sa_replay; | |
1105 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | |
1106 | x->props.flags |= XFRM_STATE_NOECN; | |
1107 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1108 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1109 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1110 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 LT |
1111 | |
1112 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; | |
1113 | if (lifetime != NULL) { | |
1114 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1115 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1116 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1117 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1118 | } | |
1119 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; | |
1120 | if (lifetime != NULL) { | |
1121 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1122 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1123 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1124 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1125 | } | |
df71837d TJ |
1126 | |
1127 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; | |
1128 | if (sec_ctx != NULL) { | |
1129 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
1130 | ||
1131 | if (!uctx) | |
1132 | goto out; | |
1133 | ||
1134 | err = security_xfrm_state_alloc(x, uctx); | |
1135 | kfree(uctx); | |
1136 | ||
1137 | if (err) | |
1138 | goto out; | |
1139 | } | |
1140 | ||
1da177e4 LT |
1141 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1142 | if (sa->sadb_sa_auth) { | |
1143 | int keysize = 0; | |
1144 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
1145 | if (!a) { | |
1146 | err = -ENOSYS; | |
1147 | goto out; | |
1148 | } | |
1149 | if (key) | |
1150 | keysize = (key->sadb_key_bits + 7) / 8; | |
1151 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1152 | if (!x->aalg) | |
1153 | goto out; | |
1154 | strcpy(x->aalg->alg_name, a->name); | |
1155 | x->aalg->alg_key_len = 0; | |
1156 | if (key) { | |
1157 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1158 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1159 | } | |
1160 | x->props.aalgo = sa->sadb_sa_auth; | |
1161 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1162 | } | |
1163 | if (sa->sadb_sa_encrypt) { | |
1164 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1165 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
1166 | if (!a) { | |
1167 | err = -ENOSYS; | |
1168 | goto out; | |
1169 | } | |
1170 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1171 | if (!x->calg) | |
1172 | goto out; | |
1173 | strcpy(x->calg->alg_name, a->name); | |
1174 | x->props.calgo = sa->sadb_sa_encrypt; | |
1175 | } else { | |
1176 | int keysize = 0; | |
1177 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
1178 | if (!a) { | |
1179 | err = -ENOSYS; | |
1180 | goto out; | |
1181 | } | |
1182 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1183 | if (key) | |
1184 | keysize = (key->sadb_key_bits + 7) / 8; | |
1185 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1186 | if (!x->ealg) | |
1187 | goto out; | |
1188 | strcpy(x->ealg->alg_name, a->name); | |
1189 | x->ealg->alg_key_len = 0; | |
1190 | if (key) { | |
1191 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1192 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1193 | } | |
1194 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1195 | } | |
1196 | } | |
1197 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1198 | ||
8ff24541 | 1199 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
1200 | &x->props.saddr); |
1201 | if (!x->props.family) { | |
1202 | err = -EAFNOSUPPORT; | |
1203 | goto out; | |
1204 | } | |
8ff24541 | 1205 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1206 | &x->id.daddr); |
1207 | ||
1208 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
1209 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; | |
55569ce2 KM |
1210 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1211 | if (mode < 0) { | |
1212 | err = -EINVAL; | |
1213 | goto out; | |
1214 | } | |
1215 | x->props.mode = mode; | |
1da177e4 LT |
1216 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1217 | } | |
1218 | ||
1219 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
1220 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; | |
1221 | ||
1222 | /* Nobody uses this, but we try. */ | |
1223 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1224 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1225 | } | |
1226 | ||
4da51056 | 1227 | if (!x->sel.family) |
4a4b6271 JL |
1228 | x->sel.family = x->props.family; |
1229 | ||
1da177e4 LT |
1230 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
1231 | struct sadb_x_nat_t_type* n_type; | |
1232 | struct xfrm_encap_tmpl *natt; | |
1233 | ||
1234 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1235 | if (!x->encap) | |
1236 | goto out; | |
1237 | ||
1238 | natt = x->encap; | |
1239 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1240 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1241 | ||
1242 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
1243 | struct sadb_x_nat_t_port* n_port = | |
1244 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; | |
1245 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1246 | } | |
1247 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
1248 | struct sadb_x_nat_t_port* n_port = | |
1249 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; | |
1250 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1251 | } | |
1252 | } | |
1253 | ||
72cb6962 HX |
1254 | err = xfrm_init_state(x); |
1255 | if (err) | |
1da177e4 | 1256 | goto out; |
72cb6962 | 1257 | |
1da177e4 | 1258 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1259 | return x; |
1260 | ||
1261 | out: | |
1262 | x->km.state = XFRM_STATE_DEAD; | |
1263 | xfrm_state_put(x); | |
1264 | return ERR_PTR(err); | |
1265 | } | |
1266 | ||
1267 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1268 | { | |
1269 | return -EOPNOTSUPP; | |
1270 | } | |
1271 | ||
1272 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1273 | { | |
1274 | struct sk_buff *resp_skb; | |
1275 | struct sadb_x_sa2 *sa2; | |
1276 | struct sadb_address *saddr, *daddr; | |
1277 | struct sadb_msg *out_hdr; | |
658b219e | 1278 | struct sadb_spirange *range; |
1da177e4 | 1279 | struct xfrm_state *x = NULL; |
55569ce2 | 1280 | int mode; |
658b219e HX |
1281 | int err; |
1282 | u32 min_spi, max_spi; | |
1da177e4 LT |
1283 | u32 reqid; |
1284 | u8 proto; | |
1285 | unsigned short family; | |
1286 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1287 | ||
1288 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1289 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1290 | return -EINVAL; | |
1291 | ||
1292 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1293 | if (proto == 0) | |
1294 | return -EINVAL; | |
1295 | ||
1296 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1297 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1298 | if (mode < 0) | |
1299 | return -EINVAL; | |
1da177e4 LT |
1300 | reqid = sa2->sadb_x_sa2_reqid; |
1301 | } else { | |
1302 | mode = 0; | |
1303 | reqid = 0; | |
1304 | } | |
1305 | ||
1306 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1307 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1308 | ||
1309 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1310 | switch (family) { | |
1311 | case AF_INET: | |
1312 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1313 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1314 | break; | |
1315 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1316 | case AF_INET6: | |
1317 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1318 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1319 | break; | |
1320 | #endif | |
1321 | } | |
1322 | ||
1323 | if (hdr->sadb_msg_seq) { | |
1324 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1325 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { | |
1326 | xfrm_state_put(x); | |
1327 | x = NULL; | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | if (!x) | |
1332 | x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); | |
1333 | ||
1334 | if (x == NULL) | |
1335 | return -ENOENT; | |
1336 | ||
658b219e HX |
1337 | min_spi = 0x100; |
1338 | max_spi = 0x0fffffff; | |
1da177e4 | 1339 | |
658b219e HX |
1340 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1341 | if (range) { | |
1342 | min_spi = range->sadb_spirange_min; | |
1343 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1344 | } |
658b219e HX |
1345 | |
1346 | err = xfrm_alloc_spi(x, min_spi, max_spi); | |
050f009e | 1347 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1348 | |
1349 | if (IS_ERR(resp_skb)) { | |
1350 | xfrm_state_put(x); | |
1351 | return PTR_ERR(resp_skb); | |
1352 | } | |
1353 | ||
1354 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1355 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1356 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1357 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1358 | out_hdr->sadb_msg_errno = 0; | |
1359 | out_hdr->sadb_msg_reserved = 0; | |
1360 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1361 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1362 | ||
1363 | xfrm_state_put(x); | |
1364 | ||
1365 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
1366 | ||
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1371 | { | |
1372 | struct xfrm_state *x; | |
1373 | ||
1374 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1375 | return -EOPNOTSUPP; | |
1376 | ||
1377 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1378 | return 0; | |
1379 | ||
1380 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1381 | if (x == NULL) | |
1382 | return 0; | |
1383 | ||
1384 | spin_lock_bh(&x->lock); | |
1385 | if (x->km.state == XFRM_STATE_ACQ) { | |
1386 | x->km.state = XFRM_STATE_ERROR; | |
1387 | wake_up(&km_waitq); | |
1388 | } | |
1389 | spin_unlock_bh(&x->lock); | |
1390 | xfrm_state_put(x); | |
1391 | return 0; | |
1392 | } | |
1393 | ||
26b15dad JHS |
1394 | static inline int event2poltype(int event) |
1395 | { | |
1396 | switch (event) { | |
f60f6b8f | 1397 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1398 | return SADB_X_SPDDELETE; |
f60f6b8f | 1399 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1400 | return SADB_X_SPDADD; |
f60f6b8f | 1401 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1402 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1403 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1404 | // return SADB_X_SPDEXPIRE; |
1405 | default: | |
1406 | printk("pfkey: Unknown policy event %d\n", event); | |
1407 | break; | |
1408 | } | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | static inline int event2keytype(int event) | |
1414 | { | |
1415 | switch (event) { | |
f60f6b8f | 1416 | case XFRM_MSG_DELSA: |
26b15dad | 1417 | return SADB_DELETE; |
f60f6b8f | 1418 | case XFRM_MSG_NEWSA: |
26b15dad | 1419 | return SADB_ADD; |
f60f6b8f | 1420 | case XFRM_MSG_UPDSA: |
26b15dad | 1421 | return SADB_UPDATE; |
f60f6b8f | 1422 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1423 | return SADB_EXPIRE; |
1424 | default: | |
1425 | printk("pfkey: Unknown SA event %d\n", event); | |
1426 | break; | |
1427 | } | |
1428 | ||
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | /* ADD/UPD/DEL */ | |
1433 | static int key_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1434 | { | |
1435 | struct sk_buff *skb; | |
1436 | struct sadb_msg *hdr; | |
26b15dad | 1437 | |
050f009e | 1438 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1439 | |
1440 | if (IS_ERR(skb)) | |
1441 | return PTR_ERR(skb); | |
1442 | ||
1443 | hdr = (struct sadb_msg *) skb->data; | |
1444 | hdr->sadb_msg_version = PF_KEY_V2; | |
1445 | hdr->sadb_msg_type = event2keytype(c->event); | |
1446 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1447 | hdr->sadb_msg_errno = 0; | |
1448 | hdr->sadb_msg_reserved = 0; | |
1449 | hdr->sadb_msg_seq = c->seq; | |
1450 | hdr->sadb_msg_pid = c->pid; | |
1451 | ||
1452 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1453 | ||
1454 | return 0; | |
1455 | } | |
1da177e4 LT |
1456 | |
1457 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1458 | { | |
1da177e4 LT |
1459 | struct xfrm_state *x; |
1460 | int err; | |
26b15dad | 1461 | struct km_event c; |
1da177e4 | 1462 | |
1da177e4 LT |
1463 | x = pfkey_msg2xfrm_state(hdr, ext_hdrs); |
1464 | if (IS_ERR(x)) | |
1465 | return PTR_ERR(x); | |
1466 | ||
26b15dad | 1467 | xfrm_state_hold(x); |
1da177e4 LT |
1468 | if (hdr->sadb_msg_type == SADB_ADD) |
1469 | err = xfrm_state_add(x); | |
1470 | else | |
1471 | err = xfrm_state_update(x); | |
1472 | ||
ab5f5e8b | 1473 | xfrm_audit_state_add(x, err ? 0 : 1, |
2532386f EP |
1474 | audit_get_loginuid(current), |
1475 | audit_get_sessionid(current), 0); | |
161a09e7 | 1476 | |
1da177e4 LT |
1477 | if (err < 0) { |
1478 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1479 | __xfrm_state_put(x); |
7d6dfe1f | 1480 | goto out; |
1da177e4 LT |
1481 | } |
1482 | ||
26b15dad | 1483 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1484 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1485 | else |
f60f6b8f | 1486 | c.event = XFRM_MSG_UPDSA; |
26b15dad JHS |
1487 | c.seq = hdr->sadb_msg_seq; |
1488 | c.pid = hdr->sadb_msg_pid; | |
1489 | km_state_notify(x, &c); | |
7d6dfe1f | 1490 | out: |
26b15dad | 1491 | xfrm_state_put(x); |
26b15dad | 1492 | return err; |
1da177e4 LT |
1493 | } |
1494 | ||
1495 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1496 | { | |
1497 | struct xfrm_state *x; | |
26b15dad JHS |
1498 | struct km_event c; |
1499 | int err; | |
1da177e4 LT |
1500 | |
1501 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1502 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1503 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1504 | return -EINVAL; | |
1505 | ||
1506 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1507 | if (x == NULL) | |
1508 | return -ESRCH; | |
1509 | ||
c8c05a8e CZ |
1510 | if ((err = security_xfrm_state_delete(x))) |
1511 | goto out; | |
1512 | ||
1da177e4 | 1513 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1514 | err = -EPERM; |
1515 | goto out; | |
1da177e4 | 1516 | } |
161a09e7 | 1517 | |
26b15dad | 1518 | err = xfrm_state_delete(x); |
161a09e7 | 1519 | |
c8c05a8e CZ |
1520 | if (err < 0) |
1521 | goto out; | |
1da177e4 | 1522 | |
26b15dad JHS |
1523 | c.seq = hdr->sadb_msg_seq; |
1524 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1525 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1526 | km_state_notify(x, &c); |
c8c05a8e | 1527 | out: |
ab5f5e8b | 1528 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
1529 | audit_get_loginuid(current), |
1530 | audit_get_sessionid(current), 0); | |
26b15dad | 1531 | xfrm_state_put(x); |
1da177e4 | 1532 | |
26b15dad | 1533 | return err; |
1da177e4 LT |
1534 | } |
1535 | ||
1536 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1537 | { | |
1538 | __u8 proto; | |
1539 | struct sk_buff *out_skb; | |
1540 | struct sadb_msg *out_hdr; | |
1541 | struct xfrm_state *x; | |
1542 | ||
1543 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1544 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1545 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1546 | return -EINVAL; | |
1547 | ||
1548 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1549 | if (x == NULL) | |
1550 | return -ESRCH; | |
1551 | ||
050f009e | 1552 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1553 | proto = x->id.proto; |
1554 | xfrm_state_put(x); | |
1555 | if (IS_ERR(out_skb)) | |
1556 | return PTR_ERR(out_skb); | |
1557 | ||
1558 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1559 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1560 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1561 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1562 | out_hdr->sadb_msg_errno = 0; | |
1563 | out_hdr->sadb_msg_reserved = 0; | |
1564 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1565 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1566 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); | |
1567 | ||
1568 | return 0; | |
1569 | } | |
1570 | ||
00fa0233 | 1571 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, |
dd0fc66f | 1572 | gfp_t allocation) |
1da177e4 LT |
1573 | { |
1574 | struct sk_buff *skb; | |
1575 | struct sadb_msg *hdr; | |
1576 | int len, auth_len, enc_len, i; | |
1577 | ||
1578 | auth_len = xfrm_count_auth_supported(); | |
1579 | if (auth_len) { | |
1580 | auth_len *= sizeof(struct sadb_alg); | |
1581 | auth_len += sizeof(struct sadb_supported); | |
1582 | } | |
8ff24541 | 1583 | |
1da177e4 LT |
1584 | enc_len = xfrm_count_enc_supported(); |
1585 | if (enc_len) { | |
1586 | enc_len *= sizeof(struct sadb_alg); | |
1587 | enc_len += sizeof(struct sadb_supported); | |
1588 | } | |
8ff24541 | 1589 | |
1da177e4 LT |
1590 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1591 | ||
1592 | skb = alloc_skb(len + 16, allocation); | |
1593 | if (!skb) | |
1594 | goto out_put_algs; | |
1595 | ||
1596 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1597 | pfkey_hdr_dup(hdr, orig); | |
1598 | hdr->sadb_msg_errno = 0; | |
1599 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1600 | ||
1601 | if (auth_len) { | |
1602 | struct sadb_supported *sp; | |
1603 | struct sadb_alg *ap; | |
1604 | ||
1605 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1606 | ap = (struct sadb_alg *) (sp + 1); | |
1607 | ||
1608 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1609 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1610 | ||
1611 | for (i = 0; ; i++) { | |
1612 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1613 | if (!aalg) | |
1614 | break; | |
1615 | if (aalg->available) | |
1616 | *ap++ = aalg->desc; | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | if (enc_len) { | |
1621 | struct sadb_supported *sp; | |
1622 | struct sadb_alg *ap; | |
1623 | ||
1624 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1625 | ap = (struct sadb_alg *) (sp + 1); | |
1626 | ||
1627 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1628 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1629 | ||
1630 | for (i = 0; ; i++) { | |
1631 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1632 | if (!ealg) | |
1633 | break; | |
1634 | if (ealg->available) | |
1635 | *ap++ = ealg->desc; | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | out_put_algs: | |
1640 | return skb; | |
1641 | } | |
1642 | ||
1643 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1644 | { | |
1645 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1646 | struct sk_buff *supp_skb; | |
1647 | ||
1648 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1649 | return -EINVAL; | |
1650 | ||
1651 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1652 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1653 | return -EEXIST; | |
1654 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1655 | } | |
1656 | ||
1657 | xfrm_probe_algs(); | |
8ff24541 | 1658 | |
1da177e4 LT |
1659 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1660 | if (!supp_skb) { | |
1661 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1662 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1663 | ||
1664 | return -ENOBUFS; | |
1665 | } | |
1666 | ||
1667 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); | |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
26b15dad JHS |
1672 | static int key_notify_sa_flush(struct km_event *c) |
1673 | { | |
1674 | struct sk_buff *skb; | |
1675 | struct sadb_msg *hdr; | |
1676 | ||
1677 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1678 | if (!skb) | |
1679 | return -ENOBUFS; | |
1680 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1681 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1682 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad JHS |
1683 | hdr->sadb_msg_seq = c->seq; |
1684 | hdr->sadb_msg_pid = c->pid; | |
1685 | hdr->sadb_msg_version = PF_KEY_V2; | |
1686 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1687 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1688 | ||
1689 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1690 | ||
1691 | return 0; | |
1692 | } | |
1693 | ||
1da177e4 LT |
1694 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1695 | { | |
1696 | unsigned proto; | |
26b15dad | 1697 | struct km_event c; |
161a09e7 | 1698 | struct xfrm_audit audit_info; |
4aa2e62c | 1699 | int err; |
1da177e4 LT |
1700 | |
1701 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1702 | if (proto == 0) | |
1703 | return -EINVAL; | |
1704 | ||
0c11b942 | 1705 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 1706 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 1707 | audit_info.secid = 0; |
4aa2e62c JL |
1708 | err = xfrm_state_flush(proto, &audit_info); |
1709 | if (err) | |
1710 | return err; | |
bf08867f | 1711 | c.data.proto = proto; |
26b15dad JHS |
1712 | c.seq = hdr->sadb_msg_seq; |
1713 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1714 | c.event = XFRM_MSG_FLUSHSA; |
26b15dad | 1715 | km_state_notify(NULL, &c); |
1da177e4 LT |
1716 | |
1717 | return 0; | |
1718 | } | |
1719 | ||
1da177e4 LT |
1720 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1721 | { | |
83321d6b | 1722 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1723 | struct sk_buff *out_skb; |
1724 | struct sadb_msg *out_hdr; | |
1725 | ||
83321d6b TT |
1726 | if (!pfkey_can_dump(&pfk->sk)) |
1727 | return -ENOBUFS; | |
1728 | ||
050f009e | 1729 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1730 | if (IS_ERR(out_skb)) |
1731 | return PTR_ERR(out_skb); | |
1732 | ||
1733 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1734 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1735 | out_hdr->sadb_msg_type = SADB_DUMP; |
1736 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1737 | out_hdr->sadb_msg_errno = 0; | |
1738 | out_hdr->sadb_msg_reserved = 0; | |
1739 | out_hdr->sadb_msg_seq = count; | |
83321d6b TT |
1740 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
1741 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, &pfk->sk); | |
1da177e4 LT |
1742 | return 0; |
1743 | } | |
1744 | ||
83321d6b TT |
1745 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1746 | { | |
1747 | return xfrm_state_walk(&pfk->dump.u.state, dump_sa, (void *) pfk); | |
1748 | } | |
1749 | ||
1750 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1751 | { | |
1752 | xfrm_state_walk_done(&pfk->dump.u.state); | |
1753 | } | |
1754 | ||
1da177e4 LT |
1755 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1756 | { | |
1757 | u8 proto; | |
83321d6b TT |
1758 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1759 | ||
1760 | if (pfk->dump.dump != NULL) | |
1761 | return -EBUSY; | |
1da177e4 LT |
1762 | |
1763 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1764 | if (proto == 0) | |
1765 | return -EINVAL; | |
1766 | ||
83321d6b TT |
1767 | pfk->dump.msg_version = hdr->sadb_msg_version; |
1768 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
1769 | pfk->dump.dump = pfkey_dump_sa; | |
1770 | pfk->dump.done = pfkey_dump_sa_done; | |
1771 | xfrm_state_walk_init(&pfk->dump.u.state, proto); | |
4c563f76 | 1772 | |
83321d6b | 1773 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1774 | } |
1775 | ||
1776 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1777 | { | |
1778 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1779 | int satype = hdr->sadb_msg_satype; | |
1780 | ||
1781 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
1782 | /* XXX we mangle packet... */ | |
1783 | hdr->sadb_msg_errno = 0; | |
1784 | if (satype != 0 && satype != 1) | |
1785 | return -EINVAL; | |
1786 | pfk->promisc = satype; | |
1787 | } | |
1788 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1793 | { | |
1794 | int i; | |
1795 | u32 reqid = *(u32*)ptr; | |
1796 | ||
1797 | for (i=0; i<xp->xfrm_nr; i++) { | |
1798 | if (xp->xfrm_vec[i].reqid == reqid) | |
1799 | return -EEXIST; | |
1800 | } | |
1801 | return 0; | |
1802 | } | |
1803 | ||
1804 | static u32 gen_reqid(void) | |
1805 | { | |
4c563f76 | 1806 | struct xfrm_policy_walk walk; |
1da177e4 | 1807 | u32 start; |
4c563f76 | 1808 | int rc; |
1da177e4 LT |
1809 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1810 | ||
1811 | start = reqid; | |
1812 | do { | |
1813 | ++reqid; | |
1814 | if (reqid == 0) | |
1815 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 TT |
1816 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
1817 | rc = xfrm_policy_walk(&walk, check_reqid, (void*)&reqid); | |
1818 | xfrm_policy_walk_done(&walk); | |
1819 | if (rc != -EEXIST) | |
1da177e4 LT |
1820 | return reqid; |
1821 | } while (reqid != start); | |
1822 | return 0; | |
1823 | } | |
1824 | ||
1825 | static int | |
1826 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1827 | { | |
1828 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; | |
55569ce2 | 1829 | int mode; |
1da177e4 LT |
1830 | |
1831 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1832 | return -ELOOP; | |
1833 | ||
1834 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1835 | return -EINVAL; | |
1836 | ||
1837 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1838 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1839 | return -EINVAL; | |
1840 | t->mode = mode; | |
1da177e4 LT |
1841 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1842 | t->optional = 1; | |
1843 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1844 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1845 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1846 | t->reqid = 0; | |
1847 | if (!t->reqid && !(t->reqid = gen_reqid())) | |
1848 | return -ENOBUFS; | |
1849 | } | |
1850 | ||
1851 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1852 | if (t->mode == XFRM_MODE_TUNNEL) { |
5f95ac91 YH |
1853 | u8 *sa = (u8 *) (rq + 1); |
1854 | int family, socklen; | |
1855 | ||
1856 | family = pfkey_sockaddr_extract((struct sockaddr *)sa, | |
1857 | &t->saddr); | |
1858 | if (!family) | |
1da177e4 | 1859 | return -EINVAL; |
5f95ac91 YH |
1860 | |
1861 | socklen = pfkey_sockaddr_len(family); | |
1862 | if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), | |
1863 | &t->id.daddr) != family) | |
1864 | return -EINVAL; | |
1865 | t->encap_family = family; | |
2718aa7c MK |
1866 | } else |
1867 | t->encap_family = xp->family; | |
1868 | ||
1da177e4 | 1869 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1870 | t->allalgs = 1; |
1da177e4 LT |
1871 | xp->xfrm_nr++; |
1872 | return 0; | |
1873 | } | |
1874 | ||
1875 | static int | |
1876 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1877 | { | |
1878 | int err; | |
1879 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1880 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1881 | ||
1882 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | |
1883 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1884 | return err; | |
1885 | len -= rq->sadb_x_ipsecrequest_len; | |
1886 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1887 | } | |
1888 | return 0; | |
1889 | } | |
1890 | ||
df71837d TJ |
1891 | static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) |
1892 | { | |
1893 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1894 | ||
1895 | if (xfrm_ctx) { | |
1896 | int len = sizeof(struct sadb_x_sec_ctx); | |
1897 | len += xfrm_ctx->ctx_len; | |
1898 | return PFKEY_ALIGN8(len); | |
1899 | } | |
1900 | return 0; | |
1901 | } | |
1902 | ||
1da177e4 LT |
1903 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) |
1904 | { | |
2718aa7c | 1905 | struct xfrm_tmpl *t; |
1da177e4 | 1906 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
1907 | int socklen = 0; |
1908 | int i; | |
1909 | ||
1910 | for (i=0; i<xp->xfrm_nr; i++) { | |
1911 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 1912 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 1913 | } |
1da177e4 LT |
1914 | |
1915 | return sizeof(struct sadb_msg) + | |
1916 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 1917 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
1918 | (sockaddr_size * 2) + |
1919 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
1920 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1921 | (socklen * 2) + | |
df71837d | 1922 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
1923 | } |
1924 | ||
1925 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) | |
1926 | { | |
1927 | struct sk_buff *skb; | |
1928 | int size; | |
1929 | ||
1930 | size = pfkey_xfrm_policy2msg_size(xp); | |
1931 | ||
1932 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
1933 | if (skb == NULL) | |
1934 | return ERR_PTR(-ENOBUFS); | |
1935 | ||
1936 | return skb; | |
1937 | } | |
1938 | ||
55569ce2 | 1939 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) |
1da177e4 LT |
1940 | { |
1941 | struct sadb_msg *hdr; | |
1942 | struct sadb_address *addr; | |
1943 | struct sadb_lifetime *lifetime; | |
1944 | struct sadb_x_policy *pol; | |
df71837d TJ |
1945 | struct sadb_x_sec_ctx *sec_ctx; |
1946 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
1947 | int i; |
1948 | int size; | |
1949 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 1950 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
1951 | |
1952 | size = pfkey_xfrm_policy2msg_size(xp); | |
1953 | ||
1954 | /* call should fill header later */ | |
1955 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
1956 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
1957 | ||
1958 | /* src address */ | |
8ff24541 | 1959 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 1960 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 1961 | addr->sadb_address_len = |
1da177e4 LT |
1962 | (sizeof(struct sadb_address)+sockaddr_size)/ |
1963 | sizeof(uint64_t); | |
1964 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
1965 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
1966 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
1967 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
1968 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
1969 | xp->selector.sport, | |
1970 | (struct sockaddr *) (addr + 1), | |
1971 | xp->family)) | |
1da177e4 LT |
1972 | BUG(); |
1973 | ||
1974 | /* dst address */ | |
8ff24541 | 1975 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
1976 | sizeof(struct sadb_address)+sockaddr_size); |
1977 | addr->sadb_address_len = | |
1978 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
1979 | sizeof(uint64_t); | |
1980 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
1981 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 1982 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 1983 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
1984 | |
1985 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
1986 | (struct sockaddr *) (addr + 1), | |
1987 | xp->family); | |
1da177e4 LT |
1988 | |
1989 | /* hard time */ | |
8ff24541 | 1990 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
1991 | sizeof(struct sadb_lifetime)); |
1992 | lifetime->sadb_lifetime_len = | |
1993 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
1994 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
1995 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
1996 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
1997 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
1998 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
1999 | /* soft time */ | |
8ff24541 | 2000 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2001 | sizeof(struct sadb_lifetime)); |
2002 | lifetime->sadb_lifetime_len = | |
2003 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2004 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2005 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2006 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2007 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2008 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2009 | /* current time */ | |
8ff24541 | 2010 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2011 | sizeof(struct sadb_lifetime)); |
2012 | lifetime->sadb_lifetime_len = | |
2013 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2014 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2015 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2016 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2017 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2018 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2019 | ||
2020 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2021 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2022 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2023 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2024 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2025 | if (xp->xfrm_nr) | |
2026 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2027 | else | |
2028 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2029 | } | |
2030 | pol->sadb_x_policy_dir = dir+1; | |
2031 | pol->sadb_x_policy_id = xp->index; | |
2032 | pol->sadb_x_policy_priority = xp->priority; | |
2033 | ||
2034 | for (i=0; i<xp->xfrm_nr; i++) { | |
2035 | struct sadb_x_ipsecrequest *rq; | |
2036 | struct xfrm_tmpl *t = xp->xfrm_vec + i; | |
2037 | int req_size; | |
55569ce2 | 2038 | int mode; |
1da177e4 LT |
2039 | |
2040 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2041 | if (t->mode == XFRM_MODE_TUNNEL) { |
2042 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2043 | req_size += socklen * 2; | |
2044 | } else { | |
1da177e4 | 2045 | size -= 2*socklen; |
e5b56652 YH |
2046 | socklen = 0; |
2047 | } | |
1da177e4 LT |
2048 | rq = (void*)skb_put(skb, req_size); |
2049 | pol->sadb_x_policy_len += req_size/8; | |
2050 | memset(rq, 0, sizeof(*rq)); | |
2051 | rq->sadb_x_ipsecrequest_len = req_size; | |
2052 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2053 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2054 | return -EINVAL; | |
fefaa75e | 2055 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2056 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2057 | if (t->reqid) | |
2058 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2059 | if (t->optional) | |
2060 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2061 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2062 | |
7e49e6de | 2063 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2064 | u8 *sa = (void *)(rq + 1); |
2065 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2066 | (struct sockaddr *)sa, | |
2067 | t->encap_family); | |
2068 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2069 | (struct sockaddr *) (sa + socklen), | |
2070 | t->encap_family); | |
1da177e4 LT |
2071 | } |
2072 | } | |
df71837d TJ |
2073 | |
2074 | /* security context */ | |
2075 | if ((xfrm_ctx = xp->security)) { | |
2076 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2077 | ||
2078 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2079 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2080 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2081 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2082 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2083 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2084 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2085 | xfrm_ctx->ctx_len); | |
2086 | } | |
2087 | ||
1da177e4 LT |
2088 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2089 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
55569ce2 KM |
2090 | |
2091 | return 0; | |
1da177e4 LT |
2092 | } |
2093 | ||
26b15dad JHS |
2094 | static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2095 | { | |
2096 | struct sk_buff *out_skb; | |
2097 | struct sadb_msg *out_hdr; | |
2098 | int err; | |
2099 | ||
2100 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2101 | if (IS_ERR(out_skb)) { | |
2102 | err = PTR_ERR(out_skb); | |
2103 | goto out; | |
2104 | } | |
55569ce2 KM |
2105 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2106 | if (err < 0) | |
2107 | return err; | |
26b15dad JHS |
2108 | |
2109 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2110 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2111 | ||
f60f6b8f | 2112 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2113 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2114 | else | |
2115 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2116 | out_hdr->sadb_msg_errno = 0; | |
2117 | out_hdr->sadb_msg_seq = c->seq; | |
2118 | out_hdr->sadb_msg_pid = c->pid; | |
2119 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2120 | out: | |
2121 | return 0; | |
2122 | ||
2123 | } | |
2124 | ||
1da177e4 LT |
2125 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2126 | { | |
df71837d | 2127 | int err = 0; |
1da177e4 LT |
2128 | struct sadb_lifetime *lifetime; |
2129 | struct sadb_address *sa; | |
2130 | struct sadb_x_policy *pol; | |
2131 | struct xfrm_policy *xp; | |
26b15dad | 2132 | struct km_event c; |
df71837d | 2133 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2134 | |
2135 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2136 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2137 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2138 | return -EINVAL; | |
2139 | ||
2140 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2141 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2142 | return -EINVAL; | |
2143 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2144 | return -EINVAL; | |
2145 | ||
2146 | xp = xfrm_policy_alloc(GFP_KERNEL); | |
2147 | if (xp == NULL) | |
2148 | return -ENOBUFS; | |
2149 | ||
2150 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2151 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2152 | xp->priority = pol->sadb_x_policy_priority; | |
2153 | ||
8ff24541 | 2154 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2155 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
2156 | if (!xp->family) { | |
2157 | err = -EINVAL; | |
2158 | goto out; | |
2159 | } | |
2160 | xp->selector.family = xp->family; | |
2161 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2162 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2163 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2164 | if (xp->selector.sport) | |
8f83f23e | 2165 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2166 | |
8ff24541 | 2167 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2168 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2169 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2170 | ||
2171 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2172 | * in both addresses. | |
2173 | */ | |
2174 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2175 | ||
2176 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2177 | if (xp->selector.dport) | |
8f83f23e | 2178 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2179 | |
df71837d TJ |
2180 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2181 | if (sec_ctx != NULL) { | |
2182 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2183 | ||
2184 | if (!uctx) { | |
2185 | err = -ENOBUFS; | |
2186 | goto out; | |
2187 | } | |
2188 | ||
03e1ad7b | 2189 | err = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
2190 | kfree(uctx); |
2191 | ||
2192 | if (err) | |
2193 | goto out; | |
2194 | } | |
2195 | ||
1da177e4 LT |
2196 | xp->lft.soft_byte_limit = XFRM_INF; |
2197 | xp->lft.hard_byte_limit = XFRM_INF; | |
2198 | xp->lft.soft_packet_limit = XFRM_INF; | |
2199 | xp->lft.hard_packet_limit = XFRM_INF; | |
2200 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2201 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2202 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2203 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2204 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2205 | } | |
2206 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2207 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2208 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2209 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2210 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2211 | } | |
2212 | xp->xfrm_nr = 0; | |
2213 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2214 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2215 | goto out; | |
2216 | ||
1da177e4 LT |
2217 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2218 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2219 | |
ab5f5e8b | 2220 | xfrm_audit_policy_add(xp, err ? 0 : 1, |
2532386f EP |
2221 | audit_get_loginuid(current), |
2222 | audit_get_sessionid(current), 0); | |
161a09e7 | 2223 | |
df71837d TJ |
2224 | if (err) |
2225 | goto out; | |
1da177e4 | 2226 | |
26b15dad | 2227 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2228 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2229 | else |
f60f6b8f | 2230 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2231 | |
26b15dad JHS |
2232 | c.seq = hdr->sadb_msg_seq; |
2233 | c.pid = hdr->sadb_msg_pid; | |
1da177e4 | 2234 | |
26b15dad JHS |
2235 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2236 | xfrm_pol_put(xp); | |
1da177e4 LT |
2237 | return 0; |
2238 | ||
2239 | out: | |
a4d6b8af | 2240 | xp->dead = 1; |
64c31b3f | 2241 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2242 | return err; |
2243 | } | |
2244 | ||
2245 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2246 | { | |
2247 | int err; | |
2248 | struct sadb_address *sa; | |
2249 | struct sadb_x_policy *pol; | |
03e1ad7b | 2250 | struct xfrm_policy *xp; |
1da177e4 | 2251 | struct xfrm_selector sel; |
26b15dad | 2252 | struct km_event c; |
df71837d | 2253 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2254 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2255 | |
2256 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2257 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2258 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2259 | return -EINVAL; | |
2260 | ||
2261 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2262 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2263 | return -EINVAL; | |
2264 | ||
2265 | memset(&sel, 0, sizeof(sel)); | |
2266 | ||
8ff24541 | 2267 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2268 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2269 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2270 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2271 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2272 | if (sel.sport) | |
8f83f23e | 2273 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2274 | |
8ff24541 | 2275 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2276 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2277 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2278 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2279 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2280 | if (sel.dport) | |
8f83f23e | 2281 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2282 | |
df71837d | 2283 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
df71837d TJ |
2284 | if (sec_ctx != NULL) { |
2285 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2286 | ||
2287 | if (!uctx) | |
2288 | return -ENOMEM; | |
2289 | ||
03e1ad7b | 2290 | err = security_xfrm_policy_alloc(&pol_ctx, uctx); |
df71837d | 2291 | kfree(uctx); |
df71837d TJ |
2292 | if (err) |
2293 | return err; | |
2db3e47e | 2294 | } |
161a09e7 | 2295 | |
03e1ad7b PM |
2296 | xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, |
2297 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, | |
2298 | 1, &err); | |
2299 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2300 | if (xp == NULL) |
2301 | return -ENOENT; | |
2302 | ||
ab5f5e8b | 2303 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2304 | audit_get_loginuid(current), |
2305 | audit_get_sessionid(current), 0); | |
13fcfbb0 DM |
2306 | |
2307 | if (err) | |
c8c05a8e | 2308 | goto out; |
13fcfbb0 | 2309 | |
26b15dad JHS |
2310 | c.seq = hdr->sadb_msg_seq; |
2311 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 2312 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2313 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2314 | ||
c8c05a8e | 2315 | out: |
26b15dad JHS |
2316 | xfrm_pol_put(xp); |
2317 | return err; | |
2318 | } | |
2319 | ||
2320 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) | |
2321 | { | |
2322 | int err; | |
2323 | struct sk_buff *out_skb; | |
2324 | struct sadb_msg *out_hdr; | |
2325 | err = 0; | |
2326 | ||
1da177e4 LT |
2327 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2328 | if (IS_ERR(out_skb)) { | |
2329 | err = PTR_ERR(out_skb); | |
2330 | goto out; | |
2331 | } | |
55569ce2 KM |
2332 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2333 | if (err < 0) | |
2334 | goto out; | |
1da177e4 LT |
2335 | |
2336 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2337 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2338 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2339 | out_hdr->sadb_msg_satype = 0; |
2340 | out_hdr->sadb_msg_errno = 0; | |
2341 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2342 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
26b15dad | 2343 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); |
1da177e4 LT |
2344 | err = 0; |
2345 | ||
2346 | out: | |
1da177e4 LT |
2347 | return err; |
2348 | } | |
2349 | ||
08de61be SS |
2350 | #ifdef CONFIG_NET_KEY_MIGRATE |
2351 | static int pfkey_sockaddr_pair_size(sa_family_t family) | |
2352 | { | |
9e8b4ed8 | 2353 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2354 | } |
2355 | ||
2356 | static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq, | |
2357 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
2358 | u16 *family) | |
2359 | { | |
5f95ac91 YH |
2360 | u8 *sa = (u8 *) (rq + 1); |
2361 | int af, socklen; | |
2362 | ||
08de61be | 2363 | if (rq->sadb_x_ipsecrequest_len < |
5f95ac91 | 2364 | pfkey_sockaddr_pair_size(((struct sockaddr *)sa)->sa_family)) |
08de61be SS |
2365 | return -EINVAL; |
2366 | ||
5f95ac91 YH |
2367 | af = pfkey_sockaddr_extract((struct sockaddr *) sa, |
2368 | saddr); | |
2369 | if (!af) | |
2370 | return -EINVAL; | |
2371 | ||
2372 | socklen = pfkey_sockaddr_len(af); | |
2373 | if (pfkey_sockaddr_extract((struct sockaddr *) (sa + socklen), | |
2374 | daddr) != af) | |
08de61be | 2375 | return -EINVAL; |
08de61be | 2376 | |
5f95ac91 | 2377 | *family = af; |
08de61be SS |
2378 | return 0; |
2379 | } | |
2380 | ||
2381 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, | |
2382 | struct xfrm_migrate *m) | |
2383 | { | |
2384 | int err; | |
2385 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2386 | int mode; |
08de61be SS |
2387 | |
2388 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2389 | len < rq1->sadb_x_ipsecrequest_len) | |
2390 | return -EINVAL; | |
2391 | ||
2392 | /* old endoints */ | |
2393 | err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr, | |
2394 | &m->old_family); | |
2395 | if (err) | |
2396 | return err; | |
2397 | ||
2398 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2399 | len -= rq1->sadb_x_ipsecrequest_len; | |
2400 | ||
2401 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2402 | len < rq2->sadb_x_ipsecrequest_len) | |
2403 | return -EINVAL; | |
2404 | ||
2405 | /* new endpoints */ | |
2406 | err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr, | |
2407 | &m->new_family); | |
2408 | if (err) | |
2409 | return err; | |
2410 | ||
2411 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2412 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2413 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2414 | return -EINVAL; | |
2415 | ||
2416 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2417 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2418 | return -EINVAL; | |
2419 | m->mode = mode; | |
08de61be SS |
2420 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2421 | ||
2422 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2423 | rq2->sadb_x_ipsecrequest_len)); | |
2424 | } | |
2425 | ||
2426 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2427 | struct sadb_msg *hdr, void **ext_hdrs) | |
2428 | { | |
2429 | int i, len, ret, err = -EINVAL; | |
2430 | u8 dir; | |
2431 | struct sadb_address *sa; | |
2432 | struct sadb_x_policy *pol; | |
2433 | struct sadb_x_ipsecrequest *rq; | |
2434 | struct xfrm_selector sel; | |
2435 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
2436 | ||
2437 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
2438 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || | |
2439 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { | |
2440 | err = -EINVAL; | |
2441 | goto out; | |
2442 | } | |
2443 | ||
2444 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; | |
2445 | if (!pol) { | |
2446 | err = -EINVAL; | |
2447 | goto out; | |
2448 | } | |
2449 | ||
2450 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2451 | err = -EINVAL; | |
2452 | goto out; | |
2453 | } | |
2454 | ||
2455 | dir = pol->sadb_x_policy_dir - 1; | |
2456 | memset(&sel, 0, sizeof(sel)); | |
2457 | ||
2458 | /* set source address info of selector */ | |
2459 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2460 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2461 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2462 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2463 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2464 | if (sel.sport) | |
582ee43d | 2465 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2466 | |
2467 | /* set destination address info of selector */ | |
2468 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], | |
2469 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2470 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2471 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2472 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2473 | if (sel.dport) | |
582ee43d | 2474 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2475 | |
2476 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2477 | ||
2478 | /* extract ipsecrequests */ | |
2479 | i = 0; | |
2480 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2481 | ||
2482 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2483 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2484 | if (ret < 0) { | |
2485 | err = ret; | |
2486 | goto out; | |
2487 | } else { | |
2488 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2489 | len -= ret; | |
2490 | i++; | |
2491 | } | |
2492 | } | |
2493 | ||
2494 | if (!i || len > 0) { | |
2495 | err = -EINVAL; | |
2496 | goto out; | |
2497 | } | |
2498 | ||
2499 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i); | |
2500 | ||
2501 | out: | |
2502 | return err; | |
2503 | } | |
2504 | #else | |
2505 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2506 | struct sadb_msg *hdr, void **ext_hdrs) | |
2507 | { | |
2508 | return -ENOPROTOOPT; | |
2509 | } | |
2510 | #endif | |
2511 | ||
2512 | ||
1da177e4 LT |
2513 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2514 | { | |
77d8d7a6 | 2515 | unsigned int dir; |
215a2dd3 | 2516 | int err = 0, delete; |
1da177e4 LT |
2517 | struct sadb_x_policy *pol; |
2518 | struct xfrm_policy *xp; | |
26b15dad | 2519 | struct km_event c; |
1da177e4 LT |
2520 | |
2521 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2522 | return -EINVAL; | |
2523 | ||
77d8d7a6 HX |
2524 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2525 | if (dir >= XFRM_POLICY_MAX) | |
2526 | return -EINVAL; | |
2527 | ||
215a2dd3 | 2528 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
f7b6983f | 2529 | xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id, |
215a2dd3 | 2530 | delete, &err); |
1da177e4 LT |
2531 | if (xp == NULL) |
2532 | return -ENOENT; | |
2533 | ||
215a2dd3 | 2534 | if (delete) { |
ab5f5e8b | 2535 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2536 | audit_get_loginuid(current), |
2537 | audit_get_sessionid(current), 0); | |
1da177e4 | 2538 | |
215a2dd3 EP |
2539 | if (err) |
2540 | goto out; | |
2541 | c.seq = hdr->sadb_msg_seq; | |
2542 | c.pid = hdr->sadb_msg_pid; | |
bf08867f | 2543 | c.data.byid = 1; |
f60f6b8f | 2544 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2545 | km_policy_notify(xp, dir, &c); |
26b15dad | 2546 | } else { |
77d8d7a6 | 2547 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2548 | } |
1da177e4 | 2549 | |
215a2dd3 | 2550 | out: |
1da177e4 LT |
2551 | xfrm_pol_put(xp); |
2552 | return err; | |
2553 | } | |
2554 | ||
2555 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2556 | { | |
83321d6b | 2557 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2558 | struct sk_buff *out_skb; |
2559 | struct sadb_msg *out_hdr; | |
55569ce2 | 2560 | int err; |
1da177e4 | 2561 | |
83321d6b TT |
2562 | if (!pfkey_can_dump(&pfk->sk)) |
2563 | return -ENOBUFS; | |
2564 | ||
1da177e4 LT |
2565 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2566 | if (IS_ERR(out_skb)) | |
2567 | return PTR_ERR(out_skb); | |
2568 | ||
55569ce2 KM |
2569 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2570 | if (err < 0) | |
2571 | return err; | |
1da177e4 LT |
2572 | |
2573 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2574 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2575 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2576 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2577 | out_hdr->sadb_msg_errno = 0; | |
2578 | out_hdr->sadb_msg_seq = count; | |
83321d6b TT |
2579 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
2580 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, &pfk->sk); | |
1da177e4 LT |
2581 | return 0; |
2582 | } | |
2583 | ||
83321d6b TT |
2584 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2585 | { | |
2586 | return xfrm_policy_walk(&pfk->dump.u.policy, dump_sp, (void *) pfk); | |
2587 | } | |
2588 | ||
2589 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2590 | { | |
2591 | xfrm_policy_walk_done(&pfk->dump.u.policy); | |
2592 | } | |
2593 | ||
1da177e4 LT |
2594 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2595 | { | |
83321d6b | 2596 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2597 | |
83321d6b TT |
2598 | if (pfk->dump.dump != NULL) |
2599 | return -EBUSY; | |
1da177e4 | 2600 | |
83321d6b TT |
2601 | pfk->dump.msg_version = hdr->sadb_msg_version; |
2602 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
2603 | pfk->dump.dump = pfkey_dump_sp; | |
2604 | pfk->dump.done = pfkey_dump_sp_done; | |
2605 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
2606 | ||
2607 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2608 | } |
2609 | ||
26b15dad | 2610 | static int key_notify_policy_flush(struct km_event *c) |
1da177e4 LT |
2611 | { |
2612 | struct sk_buff *skb_out; | |
26b15dad | 2613 | struct sadb_msg *hdr; |
1da177e4 | 2614 | |
26b15dad | 2615 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2616 | if (!skb_out) |
2617 | return -ENOBUFS; | |
26b15dad | 2618 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2619 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad JHS |
2620 | hdr->sadb_msg_seq = c->seq; |
2621 | hdr->sadb_msg_pid = c->pid; | |
2622 | hdr->sadb_msg_version = PF_KEY_V2; | |
2623 | hdr->sadb_msg_errno = (uint8_t) 0; | |
2624 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
2625 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2626 | return 0; | |
1da177e4 | 2627 | |
26b15dad JHS |
2628 | } |
2629 | ||
2630 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2631 | { | |
2632 | struct km_event c; | |
161a09e7 | 2633 | struct xfrm_audit audit_info; |
4aa2e62c | 2634 | int err; |
1da177e4 | 2635 | |
0c11b942 | 2636 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 2637 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 2638 | audit_info.secid = 0; |
4aa2e62c JL |
2639 | err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info); |
2640 | if (err) | |
2641 | return err; | |
f7b6983f | 2642 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2643 | c.event = XFRM_MSG_FLUSHPOLICY; |
26b15dad JHS |
2644 | c.pid = hdr->sadb_msg_pid; |
2645 | c.seq = hdr->sadb_msg_seq; | |
2646 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
2647 | |
2648 | return 0; | |
2649 | } | |
2650 | ||
2651 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
2652 | struct sadb_msg *hdr, void **ext_hdrs); | |
2653 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { | |
2654 | [SADB_RESERVED] = pfkey_reserved, | |
2655 | [SADB_GETSPI] = pfkey_getspi, | |
2656 | [SADB_UPDATE] = pfkey_add, | |
2657 | [SADB_ADD] = pfkey_add, | |
2658 | [SADB_DELETE] = pfkey_delete, | |
2659 | [SADB_GET] = pfkey_get, | |
2660 | [SADB_ACQUIRE] = pfkey_acquire, | |
2661 | [SADB_REGISTER] = pfkey_register, | |
2662 | [SADB_EXPIRE] = NULL, | |
2663 | [SADB_FLUSH] = pfkey_flush, | |
2664 | [SADB_DUMP] = pfkey_dump, | |
2665 | [SADB_X_PROMISC] = pfkey_promisc, | |
2666 | [SADB_X_PCHANGE] = NULL, | |
2667 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2668 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2669 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2670 | [SADB_X_SPDGET] = pfkey_spdget, | |
2671 | [SADB_X_SPDACQUIRE] = NULL, | |
2672 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2673 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2674 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2675 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2676 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2677 | }; |
2678 | ||
2679 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) | |
2680 | { | |
2681 | void *ext_hdrs[SADB_EXT_MAX]; | |
2682 | int err; | |
2683 | ||
2684 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
2685 | BROADCAST_PROMISC_ONLY, NULL); | |
2686 | ||
2687 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2688 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2689 | if (!err) { | |
2690 | err = -EOPNOTSUPP; | |
2691 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2692 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2693 | } | |
2694 | return err; | |
2695 | } | |
2696 | ||
2697 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2698 | { | |
2699 | struct sadb_msg *hdr = NULL; | |
2700 | ||
2701 | if (skb->len < sizeof(*hdr)) { | |
2702 | *errp = -EMSGSIZE; | |
2703 | } else { | |
2704 | hdr = (struct sadb_msg *) skb->data; | |
2705 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2706 | hdr->sadb_msg_reserved != 0 || | |
2707 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2708 | hdr->sadb_msg_type > SADB_MAX)) { | |
2709 | hdr = NULL; | |
2710 | *errp = -EINVAL; | |
2711 | } else if (hdr->sadb_msg_len != (skb->len / | |
2712 | sizeof(uint64_t)) || | |
2713 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2714 | sizeof(uint64_t))) { | |
2715 | hdr = NULL; | |
2716 | *errp = -EMSGSIZE; | |
2717 | } else { | |
2718 | *errp = 0; | |
2719 | } | |
2720 | } | |
2721 | return hdr; | |
2722 | } | |
2723 | ||
2724 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2725 | { | |
f398035f HX |
2726 | unsigned int id = d->desc.sadb_alg_id; |
2727 | ||
2728 | if (id >= sizeof(t->aalgos) * 8) | |
2729 | return 0; | |
2730 | ||
2731 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2732 | } |
2733 | ||
2734 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2735 | { | |
f398035f HX |
2736 | unsigned int id = d->desc.sadb_alg_id; |
2737 | ||
2738 | if (id >= sizeof(t->ealgos) * 8) | |
2739 | return 0; | |
2740 | ||
2741 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2742 | } |
2743 | ||
2744 | static int count_ah_combs(struct xfrm_tmpl *t) | |
2745 | { | |
2746 | int i, sz = 0; | |
2747 | ||
2748 | for (i = 0; ; i++) { | |
2749 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2750 | if (!aalg) | |
2751 | break; | |
2752 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2753 | sz += sizeof(struct sadb_comb); | |
2754 | } | |
2755 | return sz + sizeof(struct sadb_prop); | |
2756 | } | |
2757 | ||
2758 | static int count_esp_combs(struct xfrm_tmpl *t) | |
2759 | { | |
2760 | int i, k, sz = 0; | |
2761 | ||
2762 | for (i = 0; ; i++) { | |
2763 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2764 | if (!ealg) | |
2765 | break; | |
8ff24541 | 2766 | |
1da177e4 LT |
2767 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2768 | continue; | |
8ff24541 | 2769 | |
1da177e4 LT |
2770 | for (k = 1; ; k++) { |
2771 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2772 | if (!aalg) | |
2773 | break; | |
8ff24541 | 2774 | |
1da177e4 LT |
2775 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2776 | sz += sizeof(struct sadb_comb); | |
2777 | } | |
2778 | } | |
2779 | return sz + sizeof(struct sadb_prop); | |
2780 | } | |
2781 | ||
2782 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2783 | { | |
2784 | struct sadb_prop *p; | |
2785 | int i; | |
2786 | ||
2787 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2788 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2789 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2790 | p->sadb_prop_replay = 32; | |
2791 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2792 | ||
2793 | for (i = 0; ; i++) { | |
2794 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2795 | if (!aalg) | |
2796 | break; | |
2797 | ||
2798 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | |
2799 | struct sadb_comb *c; | |
2800 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2801 | memset(c, 0, sizeof(*c)); | |
2802 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2803 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2804 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2805 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2806 | c->sadb_comb_hard_addtime = 24*60*60; | |
2807 | c->sadb_comb_soft_addtime = 20*60*60; | |
2808 | c->sadb_comb_hard_usetime = 8*60*60; | |
2809 | c->sadb_comb_soft_usetime = 7*60*60; | |
2810 | } | |
2811 | } | |
2812 | } | |
2813 | ||
2814 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2815 | { | |
2816 | struct sadb_prop *p; | |
2817 | int i, k; | |
2818 | ||
2819 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2820 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2821 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2822 | p->sadb_prop_replay = 32; | |
2823 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2824 | ||
2825 | for (i=0; ; i++) { | |
2826 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2827 | if (!ealg) | |
2828 | break; | |
8ff24541 | 2829 | |
1da177e4 LT |
2830 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2831 | continue; | |
8ff24541 | 2832 | |
1da177e4 LT |
2833 | for (k = 1; ; k++) { |
2834 | struct sadb_comb *c; | |
2835 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2836 | if (!aalg) | |
2837 | break; | |
2838 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | |
2839 | continue; | |
2840 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2841 | memset(c, 0, sizeof(*c)); | |
2842 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2843 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2844 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2845 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2846 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2847 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2848 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2849 | c->sadb_comb_hard_addtime = 24*60*60; | |
2850 | c->sadb_comb_soft_addtime = 20*60*60; | |
2851 | c->sadb_comb_hard_usetime = 8*60*60; | |
2852 | c->sadb_comb_soft_usetime = 7*60*60; | |
2853 | } | |
2854 | } | |
2855 | } | |
2856 | ||
26b15dad JHS |
2857 | static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) |
2858 | { | |
2859 | return 0; | |
2860 | } | |
2861 | ||
2862 | static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) | |
1da177e4 LT |
2863 | { |
2864 | struct sk_buff *out_skb; | |
2865 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2866 | int hard; |
2867 | int hsc; | |
2868 | ||
bf08867f | 2869 | hard = c->data.hard; |
26b15dad JHS |
2870 | if (hard) |
2871 | hsc = 2; | |
2872 | else | |
2873 | hsc = 1; | |
1da177e4 | 2874 | |
050f009e | 2875 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
2876 | if (IS_ERR(out_skb)) |
2877 | return PTR_ERR(out_skb); | |
2878 | ||
2879 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2880 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2881 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
2882 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2883 | out_hdr->sadb_msg_errno = 0; | |
2884 | out_hdr->sadb_msg_reserved = 0; | |
2885 | out_hdr->sadb_msg_seq = 0; | |
2886 | out_hdr->sadb_msg_pid = 0; | |
2887 | ||
2888 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
2889 | return 0; | |
2890 | } | |
2891 | ||
26b15dad JHS |
2892 | static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) |
2893 | { | |
99c6f60e JHS |
2894 | if (atomic_read(&pfkey_socks_nr) == 0) |
2895 | return 0; | |
2896 | ||
26b15dad | 2897 | switch (c->event) { |
f60f6b8f | 2898 | case XFRM_MSG_EXPIRE: |
26b15dad | 2899 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
2900 | case XFRM_MSG_DELSA: |
2901 | case XFRM_MSG_NEWSA: | |
2902 | case XFRM_MSG_UPDSA: | |
26b15dad | 2903 | return key_notify_sa(x, c); |
f60f6b8f | 2904 | case XFRM_MSG_FLUSHSA: |
26b15dad | 2905 | return key_notify_sa_flush(c); |
d51d081d JHS |
2906 | case XFRM_MSG_NEWAE: /* not yet supported */ |
2907 | break; | |
26b15dad JHS |
2908 | default: |
2909 | printk("pfkey: Unknown SA event %d\n", c->event); | |
2910 | break; | |
2911 | } | |
2912 | ||
2913 | return 0; | |
2914 | } | |
2915 | ||
2916 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2917 | { | |
f7b6983f MN |
2918 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
2919 | return 0; | |
2920 | ||
26b15dad | 2921 | switch (c->event) { |
f60f6b8f | 2922 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 2923 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
2924 | case XFRM_MSG_DELPOLICY: |
2925 | case XFRM_MSG_NEWPOLICY: | |
2926 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 2927 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 2928 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
2929 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
2930 | break; | |
26b15dad JHS |
2931 | return key_notify_policy_flush(c); |
2932 | default: | |
2933 | printk("pfkey: Unknown policy event %d\n", c->event); | |
2934 | break; | |
2935 | } | |
2936 | ||
2937 | return 0; | |
2938 | } | |
2939 | ||
1da177e4 LT |
2940 | static u32 get_acqseq(void) |
2941 | { | |
2942 | u32 res; | |
2943 | static u32 acqseq; | |
2944 | static DEFINE_SPINLOCK(acqseq_lock); | |
2945 | ||
2946 | spin_lock_bh(&acqseq_lock); | |
2947 | res = (++acqseq ? : ++acqseq); | |
2948 | spin_unlock_bh(&acqseq_lock); | |
2949 | return res; | |
2950 | } | |
2951 | ||
2952 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | |
2953 | { | |
2954 | struct sk_buff *skb; | |
2955 | struct sadb_msg *hdr; | |
2956 | struct sadb_address *addr; | |
2957 | struct sadb_x_policy *pol; | |
1da177e4 LT |
2958 | int sockaddr_size; |
2959 | int size; | |
4e2ba18e VY |
2960 | struct sadb_x_sec_ctx *sec_ctx; |
2961 | struct xfrm_sec_ctx *xfrm_ctx; | |
2962 | int ctx_size = 0; | |
8ff24541 | 2963 | |
1da177e4 LT |
2964 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
2965 | if (!sockaddr_size) | |
2966 | return -EINVAL; | |
2967 | ||
2968 | size = sizeof(struct sadb_msg) + | |
2969 | (sizeof(struct sadb_address) * 2) + | |
2970 | (sockaddr_size * 2) + | |
2971 | sizeof(struct sadb_x_policy); | |
8ff24541 | 2972 | |
1da177e4 LT |
2973 | if (x->id.proto == IPPROTO_AH) |
2974 | size += count_ah_combs(t); | |
2975 | else if (x->id.proto == IPPROTO_ESP) | |
2976 | size += count_esp_combs(t); | |
2977 | ||
4e2ba18e VY |
2978 | if ((xfrm_ctx = x->security)) { |
2979 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
2980 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
2981 | } | |
2982 | ||
1da177e4 LT |
2983 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
2984 | if (skb == NULL) | |
2985 | return -ENOMEM; | |
8ff24541 | 2986 | |
1da177e4 LT |
2987 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
2988 | hdr->sadb_msg_version = PF_KEY_V2; | |
2989 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
2990 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2991 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
2992 | hdr->sadb_msg_errno = 0; | |
2993 | hdr->sadb_msg_reserved = 0; | |
2994 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
2995 | hdr->sadb_msg_pid = 0; | |
2996 | ||
2997 | /* src address */ | |
8ff24541 | 2998 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 2999 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 3000 | addr->sadb_address_len = |
1da177e4 LT |
3001 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3002 | sizeof(uint64_t); | |
3003 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3004 | addr->sadb_address_proto = 0; | |
3005 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3006 | addr->sadb_address_prefixlen = |
3007 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3008 | (struct sockaddr *) (addr + 1), | |
3009 | x->props.family); | |
3010 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3011 | BUG(); |
8ff24541 | 3012 | |
1da177e4 | 3013 | /* dst address */ |
8ff24541 | 3014 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
3015 | sizeof(struct sadb_address)+sockaddr_size); |
3016 | addr->sadb_address_len = | |
3017 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3018 | sizeof(uint64_t); | |
3019 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3020 | addr->sadb_address_proto = 0; | |
3021 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3022 | addr->sadb_address_prefixlen = |
3023 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3024 | (struct sockaddr *) (addr + 1), | |
3025 | x->props.family); | |
3026 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3027 | BUG(); |
3028 | ||
3029 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
3030 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
3031 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3032 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3033 | pol->sadb_x_policy_dir = dir+1; | |
3034 | pol->sadb_x_policy_id = xp->index; | |
3035 | ||
3036 | /* Set sadb_comb's. */ | |
3037 | if (x->id.proto == IPPROTO_AH) | |
3038 | dump_ah_combs(skb, t); | |
3039 | else if (x->id.proto == IPPROTO_ESP) | |
3040 | dump_esp_combs(skb, t); | |
3041 | ||
4e2ba18e VY |
3042 | /* security context */ |
3043 | if (xfrm_ctx) { | |
3044 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
3045 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
3046 | sec_ctx->sadb_x_sec_len = | |
3047 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3048 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3049 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3050 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3051 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3052 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3053 | xfrm_ctx->ctx_len); | |
3054 | } | |
3055 | ||
1da177e4 LT |
3056 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); |
3057 | } | |
3058 | ||
cb969f07 | 3059 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3060 | u8 *data, int len, int *dir) |
1da177e4 LT |
3061 | { |
3062 | struct xfrm_policy *xp; | |
3063 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3064 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3065 | |
cb969f07 | 3066 | switch (sk->sk_family) { |
1da177e4 LT |
3067 | case AF_INET: |
3068 | if (opt != IP_IPSEC_POLICY) { | |
3069 | *dir = -EOPNOTSUPP; | |
3070 | return NULL; | |
3071 | } | |
3072 | break; | |
3073 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3074 | case AF_INET6: | |
3075 | if (opt != IPV6_IPSEC_POLICY) { | |
3076 | *dir = -EOPNOTSUPP; | |
3077 | return NULL; | |
3078 | } | |
3079 | break; | |
3080 | #endif | |
3081 | default: | |
3082 | *dir = -EINVAL; | |
3083 | return NULL; | |
3084 | } | |
3085 | ||
3086 | *dir = -EINVAL; | |
3087 | ||
3088 | if (len < sizeof(struct sadb_x_policy) || | |
3089 | pol->sadb_x_policy_len*8 > len || | |
3090 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3091 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3092 | return NULL; | |
3093 | ||
3094 | xp = xfrm_policy_alloc(GFP_ATOMIC); | |
3095 | if (xp == NULL) { | |
3096 | *dir = -ENOBUFS; | |
3097 | return NULL; | |
3098 | } | |
3099 | ||
3100 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3101 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3102 | ||
3103 | xp->lft.soft_byte_limit = XFRM_INF; | |
3104 | xp->lft.hard_byte_limit = XFRM_INF; | |
3105 | xp->lft.soft_packet_limit = XFRM_INF; | |
3106 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3107 | xp->family = sk->sk_family; |
1da177e4 LT |
3108 | |
3109 | xp->xfrm_nr = 0; | |
3110 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3111 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3112 | goto out; | |
3113 | ||
df71837d TJ |
3114 | /* security context too */ |
3115 | if (len >= (pol->sadb_x_policy_len*8 + | |
3116 | sizeof(struct sadb_x_sec_ctx))) { | |
3117 | char *p = (char *)pol; | |
3118 | struct xfrm_user_sec_ctx *uctx; | |
3119 | ||
3120 | p += pol->sadb_x_policy_len*8; | |
3121 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3122 | if (len < pol->sadb_x_policy_len*8 + | |
cb969f07 VY |
3123 | sec_ctx->sadb_x_sec_len) { |
3124 | *dir = -EINVAL; | |
df71837d | 3125 | goto out; |
cb969f07 | 3126 | } |
df71837d TJ |
3127 | if ((*dir = verify_sec_ctx_len(p))) |
3128 | goto out; | |
3129 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
03e1ad7b | 3130 | *dir = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
3131 | kfree(uctx); |
3132 | ||
3133 | if (*dir) | |
3134 | goto out; | |
3135 | } | |
3136 | ||
1da177e4 LT |
3137 | *dir = pol->sadb_x_policy_dir-1; |
3138 | return xp; | |
3139 | ||
3140 | out: | |
64c31b3f | 3141 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3142 | return NULL; |
3143 | } | |
3144 | ||
5d36b180 | 3145 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3146 | { |
3147 | struct sk_buff *skb; | |
3148 | struct sadb_msg *hdr; | |
3149 | struct sadb_sa *sa; | |
3150 | struct sadb_address *addr; | |
3151 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3152 | int sockaddr_size; |
3153 | int size; | |
3154 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3155 | struct xfrm_encap_tmpl *natt = NULL; | |
3156 | ||
3157 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3158 | if (!sockaddr_size) | |
3159 | return -EINVAL; | |
3160 | ||
3161 | if (!satype) | |
3162 | return -EINVAL; | |
3163 | ||
3164 | if (!x->encap) | |
3165 | return -EINVAL; | |
3166 | ||
3167 | natt = x->encap; | |
3168 | ||
3169 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3170 | * | |
3171 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3172 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3173 | */ | |
8ff24541 | 3174 | |
1da177e4 LT |
3175 | size = sizeof(struct sadb_msg) + |
3176 | sizeof(struct sadb_sa) + | |
3177 | (sizeof(struct sadb_address) * 2) + | |
3178 | (sockaddr_size * 2) + | |
3179 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3180 | |
1da177e4 LT |
3181 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3182 | if (skb == NULL) | |
3183 | return -ENOMEM; | |
8ff24541 | 3184 | |
1da177e4 LT |
3185 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3186 | hdr->sadb_msg_version = PF_KEY_V2; | |
3187 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3188 | hdr->sadb_msg_satype = satype; | |
3189 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3190 | hdr->sadb_msg_errno = 0; | |
3191 | hdr->sadb_msg_reserved = 0; | |
3192 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3193 | hdr->sadb_msg_pid = 0; | |
3194 | ||
3195 | /* SA */ | |
3196 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
3197 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
3198 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3199 | sa->sadb_sa_spi = x->id.spi; | |
3200 | sa->sadb_sa_replay = 0; | |
3201 | sa->sadb_sa_state = 0; | |
3202 | sa->sadb_sa_auth = 0; | |
3203 | sa->sadb_sa_encrypt = 0; | |
3204 | sa->sadb_sa_flags = 0; | |
3205 | ||
3206 | /* ADDRESS_SRC (old addr) */ | |
3207 | addr = (struct sadb_address*) | |
3208 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3209 | addr->sadb_address_len = |
1da177e4 LT |
3210 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3211 | sizeof(uint64_t); | |
3212 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3213 | addr->sadb_address_proto = 0; | |
3214 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3215 | addr->sadb_address_prefixlen = |
3216 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3217 | (struct sockaddr *) (addr + 1), | |
3218 | x->props.family); | |
3219 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3220 | BUG(); |
3221 | ||
3222 | /* NAT_T_SPORT (old port) */ | |
3223 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3224 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3225 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3226 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3227 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3228 | ||
3229 | /* ADDRESS_DST (new addr) */ | |
3230 | addr = (struct sadb_address*) | |
3231 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3232 | addr->sadb_address_len = |
1da177e4 LT |
3233 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3234 | sizeof(uint64_t); | |
3235 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3236 | addr->sadb_address_proto = 0; | |
3237 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3238 | addr->sadb_address_prefixlen = |
3239 | pfkey_sockaddr_fill(ipaddr, 0, | |
3240 | (struct sockaddr *) (addr + 1), | |
3241 | x->props.family); | |
3242 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3243 | BUG(); |
3244 | ||
3245 | /* NAT_T_DPORT (new port) */ | |
3246 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3247 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3248 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3249 | n_port->sadb_x_nat_t_port_port = sport; | |
3250 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3251 | ||
3252 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
3253 | } | |
3254 | ||
08de61be SS |
3255 | #ifdef CONFIG_NET_KEY_MIGRATE |
3256 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
3257 | struct xfrm_selector *sel) | |
3258 | { | |
3259 | struct sadb_address *addr; | |
08de61be SS |
3260 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); |
3261 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; | |
3262 | addr->sadb_address_exttype = type; | |
3263 | addr->sadb_address_proto = sel->proto; | |
3264 | addr->sadb_address_reserved = 0; | |
3265 | ||
3266 | switch (type) { | |
3267 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3268 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3269 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3270 | (struct sockaddr *)(addr + 1), | |
3271 | sel->family); | |
08de61be SS |
3272 | break; |
3273 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3274 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3275 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3276 | (struct sockaddr *)(addr + 1), | |
3277 | sel->family); | |
08de61be SS |
3278 | break; |
3279 | default: | |
3280 | return -EINVAL; | |
3281 | } | |
3282 | ||
3283 | return 0; | |
3284 | } | |
3285 | ||
3286 | static int set_ipsecrequest(struct sk_buff *skb, | |
3287 | uint8_t proto, uint8_t mode, int level, | |
3288 | uint32_t reqid, uint8_t family, | |
3289 | xfrm_address_t *src, xfrm_address_t *dst) | |
3290 | { | |
3291 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3292 | u8 *sa; |
3293 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3294 | int size_req; |
3295 | ||
3296 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3297 | pfkey_sockaddr_pair_size(family); | |
3298 | ||
3299 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); | |
3300 | memset(rq, 0, size_req); | |
3301 | rq->sadb_x_ipsecrequest_len = size_req; | |
3302 | rq->sadb_x_ipsecrequest_proto = proto; | |
3303 | rq->sadb_x_ipsecrequest_mode = mode; | |
3304 | rq->sadb_x_ipsecrequest_level = level; | |
3305 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3306 | ||
e5b56652 YH |
3307 | sa = (u8 *) (rq + 1); |
3308 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3309 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3310 | return -EINVAL; |
08de61be SS |
3311 | |
3312 | return 0; | |
3313 | } | |
3314 | #endif | |
3315 | ||
3316 | #ifdef CONFIG_NET_KEY_MIGRATE | |
3317 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
3318 | struct xfrm_migrate *m, int num_bundles) | |
3319 | { | |
3320 | int i; | |
3321 | int sasize_sel; | |
3322 | int size = 0; | |
3323 | int size_pol = 0; | |
3324 | struct sk_buff *skb; | |
3325 | struct sadb_msg *hdr; | |
3326 | struct sadb_x_policy *pol; | |
3327 | struct xfrm_migrate *mp; | |
3328 | ||
3329 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3330 | return 0; | |
3331 | ||
3332 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3333 | return -EINVAL; | |
3334 | ||
3335 | /* selector */ | |
3336 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3337 | if (!sasize_sel) | |
3338 | return -EINVAL; | |
3339 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3340 | ||
3341 | /* policy info */ | |
3342 | size_pol += sizeof(struct sadb_x_policy); | |
3343 | ||
3344 | /* ipsecrequests */ | |
3345 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3346 | /* old locator pair */ | |
3347 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3348 | pfkey_sockaddr_pair_size(mp->old_family); | |
3349 | /* new locator pair */ | |
3350 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3351 | pfkey_sockaddr_pair_size(mp->new_family); | |
3352 | } | |
3353 | ||
3354 | size += sizeof(struct sadb_msg) + size_pol; | |
3355 | ||
3356 | /* alloc buffer */ | |
3357 | skb = alloc_skb(size, GFP_ATOMIC); | |
3358 | if (skb == NULL) | |
3359 | return -ENOMEM; | |
3360 | ||
3361 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); | |
3362 | hdr->sadb_msg_version = PF_KEY_V2; | |
3363 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3364 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3365 | hdr->sadb_msg_len = size / 8; | |
3366 | hdr->sadb_msg_errno = 0; | |
3367 | hdr->sadb_msg_reserved = 0; | |
3368 | hdr->sadb_msg_seq = 0; | |
3369 | hdr->sadb_msg_pid = 0; | |
3370 | ||
3371 | /* selector src */ | |
3372 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3373 | ||
3374 | /* selector dst */ | |
3375 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3376 | ||
3377 | /* policy information */ | |
3378 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); | |
3379 | pol->sadb_x_policy_len = size_pol / 8; | |
3380 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3381 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3382 | pol->sadb_x_policy_dir = dir + 1; | |
3383 | pol->sadb_x_policy_id = 0; | |
3384 | pol->sadb_x_policy_priority = 0; | |
3385 | ||
3386 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3387 | /* old ipsecrequest */ | |
55569ce2 KM |
3388 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3389 | if (mode < 0) | |
d4782c32 | 3390 | goto err; |
55569ce2 | 3391 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3392 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3393 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3394 | &mp->old_saddr, &mp->old_daddr) < 0) |
3395 | goto err; | |
08de61be SS |
3396 | |
3397 | /* new ipsecrequest */ | |
55569ce2 | 3398 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3399 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3400 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3401 | &mp->new_saddr, &mp->new_daddr) < 0) |
3402 | goto err; | |
08de61be SS |
3403 | } |
3404 | ||
3405 | /* broadcast migrate message to sockets */ | |
3406 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
3407 | ||
3408 | return 0; | |
d4782c32 PM |
3409 | |
3410 | err: | |
3411 | kfree_skb(skb); | |
3412 | return -EINVAL; | |
08de61be SS |
3413 | } |
3414 | #else | |
3415 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
3416 | struct xfrm_migrate *m, int num_bundles) | |
3417 | { | |
3418 | return -ENOPROTOOPT; | |
3419 | } | |
3420 | #endif | |
3421 | ||
1da177e4 LT |
3422 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3423 | struct socket *sock, struct msghdr *msg, size_t len) | |
3424 | { | |
3425 | struct sock *sk = sock->sk; | |
3426 | struct sk_buff *skb = NULL; | |
3427 | struct sadb_msg *hdr = NULL; | |
3428 | int err; | |
3429 | ||
3430 | err = -EOPNOTSUPP; | |
3431 | if (msg->msg_flags & MSG_OOB) | |
3432 | goto out; | |
3433 | ||
3434 | err = -EMSGSIZE; | |
3435 | if ((unsigned)len > sk->sk_sndbuf - 32) | |
3436 | goto out; | |
3437 | ||
3438 | err = -ENOBUFS; | |
3439 | skb = alloc_skb(len, GFP_KERNEL); | |
3440 | if (skb == NULL) | |
3441 | goto out; | |
3442 | ||
3443 | err = -EFAULT; | |
3444 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3445 | goto out; | |
3446 | ||
3447 | hdr = pfkey_get_base_msg(skb, &err); | |
3448 | if (!hdr) | |
3449 | goto out; | |
3450 | ||
4a3e2f71 | 3451 | mutex_lock(&xfrm_cfg_mutex); |
1da177e4 | 3452 | err = pfkey_process(sk, skb, hdr); |
4a3e2f71 | 3453 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 LT |
3454 | |
3455 | out: | |
3456 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3457 | err = 0; | |
3458 | if (skb) | |
3459 | kfree_skb(skb); | |
3460 | ||
3461 | return err ? : len; | |
3462 | } | |
3463 | ||
3464 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3465 | struct socket *sock, struct msghdr *msg, size_t len, | |
3466 | int flags) | |
3467 | { | |
3468 | struct sock *sk = sock->sk; | |
83321d6b | 3469 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3470 | struct sk_buff *skb; |
3471 | int copied, err; | |
3472 | ||
3473 | err = -EINVAL; | |
3474 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3475 | goto out; | |
3476 | ||
3477 | msg->msg_namelen = 0; | |
3478 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | |
3479 | if (skb == NULL) | |
3480 | goto out; | |
3481 | ||
3482 | copied = skb->len; | |
3483 | if (copied > len) { | |
3484 | msg->msg_flags |= MSG_TRUNC; | |
3485 | copied = len; | |
3486 | } | |
3487 | ||
badff6d0 | 3488 | skb_reset_transport_header(skb); |
1da177e4 LT |
3489 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3490 | if (err) | |
3491 | goto out_free; | |
3492 | ||
3493 | sock_recv_timestamp(msg, sk, skb); | |
3494 | ||
3495 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3496 | ||
83321d6b TT |
3497 | if (pfk->dump.dump != NULL && |
3498 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3499 | pfkey_do_dump(pfk); | |
3500 | ||
1da177e4 LT |
3501 | out_free: |
3502 | skb_free_datagram(sk, skb); | |
3503 | out: | |
3504 | return err; | |
3505 | } | |
3506 | ||
90ddc4f0 | 3507 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3508 | .family = PF_KEY, |
3509 | .owner = THIS_MODULE, | |
3510 | /* Operations that make no sense on pfkey sockets. */ | |
3511 | .bind = sock_no_bind, | |
3512 | .connect = sock_no_connect, | |
3513 | .socketpair = sock_no_socketpair, | |
3514 | .accept = sock_no_accept, | |
3515 | .getname = sock_no_getname, | |
3516 | .ioctl = sock_no_ioctl, | |
3517 | .listen = sock_no_listen, | |
3518 | .shutdown = sock_no_shutdown, | |
3519 | .setsockopt = sock_no_setsockopt, | |
3520 | .getsockopt = sock_no_getsockopt, | |
3521 | .mmap = sock_no_mmap, | |
3522 | .sendpage = sock_no_sendpage, | |
3523 | ||
3524 | /* Now the operations that really occur. */ | |
3525 | .release = pfkey_release, | |
3526 | .poll = datagram_poll, | |
3527 | .sendmsg = pfkey_sendmsg, | |
3528 | .recvmsg = pfkey_recvmsg, | |
3529 | }; | |
3530 | ||
3531 | static struct net_proto_family pfkey_family_ops = { | |
3532 | .family = PF_KEY, | |
3533 | .create = pfkey_create, | |
3534 | .owner = THIS_MODULE, | |
3535 | }; | |
3536 | ||
3537 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3538 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3539 | { |
1da177e4 | 3540 | struct sock *s; |
1da177e4 | 3541 | |
bd2f7476 PE |
3542 | s = (struct sock *)v; |
3543 | if (v == SEQ_START_TOKEN) | |
3544 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3545 | else | |
3546 | seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n", | |
1da177e4 LT |
3547 | s, |
3548 | atomic_read(&s->sk_refcnt), | |
3549 | atomic_read(&s->sk_rmem_alloc), | |
3550 | atomic_read(&s->sk_wmem_alloc), | |
3551 | sock_i_uid(s), | |
3552 | sock_i_ino(s) | |
3553 | ); | |
bd2f7476 PE |
3554 | return 0; |
3555 | } | |
3556 | ||
3557 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
3558 | { | |
3559 | struct sock *s; | |
3560 | struct hlist_node *node; | |
3561 | loff_t pos = *ppos; | |
1da177e4 | 3562 | |
bd2f7476 PE |
3563 | read_lock(&pfkey_table_lock); |
3564 | if (pos == 0) | |
3565 | return SEQ_START_TOKEN; | |
8ff24541 | 3566 | |
bd2f7476 PE |
3567 | sk_for_each(s, node, &pfkey_table) |
3568 | if (pos-- == 1) | |
3569 | return s; | |
1da177e4 | 3570 | |
bd2f7476 PE |
3571 | return NULL; |
3572 | } | |
3573 | ||
3574 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3575 | { | |
3576 | ++*ppos; | |
3577 | return (v == SEQ_START_TOKEN) ? | |
3578 | sk_head(&pfkey_table) : | |
3579 | sk_next((struct sock *)v); | |
3580 | } | |
1da177e4 | 3581 | |
bd2f7476 PE |
3582 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
3583 | { | |
3584 | read_unlock(&pfkey_table_lock); | |
3585 | } | |
1da177e4 | 3586 | |
bd2f7476 PE |
3587 | static struct seq_operations pfkey_seq_ops = { |
3588 | .start = pfkey_seq_start, | |
3589 | .next = pfkey_seq_next, | |
3590 | .stop = pfkey_seq_stop, | |
3591 | .show = pfkey_seq_show, | |
3592 | }; | |
1da177e4 | 3593 | |
bd2f7476 PE |
3594 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3595 | { | |
3596 | return seq_open(file, &pfkey_seq_ops); | |
1da177e4 | 3597 | } |
61145aa1 | 3598 | |
bd2f7476 PE |
3599 | static struct file_operations pfkey_proc_ops = { |
3600 | .open = pfkey_seq_open, | |
3601 | .read = seq_read, | |
3602 | .llseek = seq_lseek, | |
3603 | .release = seq_release, | |
3604 | }; | |
3605 | ||
61145aa1 PE |
3606 | static int pfkey_init_proc(void) |
3607 | { | |
bd2f7476 PE |
3608 | struct proc_dir_entry *e; |
3609 | ||
d9595a7b | 3610 | e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops); |
bd2f7476 | 3611 | if (e == NULL) |
61145aa1 | 3612 | return -ENOMEM; |
bd2f7476 | 3613 | |
bd2f7476 | 3614 | return 0; |
61145aa1 PE |
3615 | } |
3616 | ||
3617 | static void pfkey_exit_proc(void) | |
3618 | { | |
d9595a7b | 3619 | proc_net_remove(&init_net, "pfkey"); |
61145aa1 PE |
3620 | } |
3621 | #else | |
3622 | static inline int pfkey_init_proc(void) | |
3623 | { | |
3624 | return 0; | |
3625 | } | |
3626 | ||
3627 | static inline void pfkey_exit_proc(void) | |
3628 | { | |
3629 | } | |
1da177e4 LT |
3630 | #endif |
3631 | ||
3632 | static struct xfrm_mgr pfkeyv2_mgr = | |
3633 | { | |
3634 | .id = "pfkeyv2", | |
3635 | .notify = pfkey_send_notify, | |
3636 | .acquire = pfkey_send_acquire, | |
3637 | .compile_policy = pfkey_compile_policy, | |
3638 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3639 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3640 | .migrate = pfkey_send_migrate, |
1da177e4 LT |
3641 | }; |
3642 | ||
3643 | static void __exit ipsec_pfkey_exit(void) | |
3644 | { | |
3645 | xfrm_unregister_km(&pfkeyv2_mgr); | |
61145aa1 | 3646 | pfkey_exit_proc(); |
1da177e4 LT |
3647 | sock_unregister(PF_KEY); |
3648 | proto_unregister(&key_proto); | |
3649 | } | |
3650 | ||
3651 | static int __init ipsec_pfkey_init(void) | |
3652 | { | |
3653 | int err = proto_register(&key_proto, 0); | |
3654 | ||
3655 | if (err != 0) | |
3656 | goto out; | |
3657 | ||
3658 | err = sock_register(&pfkey_family_ops); | |
3659 | if (err != 0) | |
3660 | goto out_unregister_key_proto; | |
61145aa1 PE |
3661 | err = pfkey_init_proc(); |
3662 | if (err != 0) | |
1da177e4 | 3663 | goto out_sock_unregister; |
1da177e4 LT |
3664 | err = xfrm_register_km(&pfkeyv2_mgr); |
3665 | if (err != 0) | |
3666 | goto out_remove_proc_entry; | |
3667 | out: | |
3668 | return err; | |
3669 | out_remove_proc_entry: | |
61145aa1 | 3670 | pfkey_exit_proc(); |
1da177e4 | 3671 | out_sock_unregister: |
1da177e4 LT |
3672 | sock_unregister(PF_KEY); |
3673 | out_unregister_key_proto: | |
3674 | proto_unregister(&key_proto); | |
3675 | goto out; | |
3676 | } | |
3677 | ||
3678 | module_init(ipsec_pfkey_init); | |
3679 | module_exit(ipsec_pfkey_exit); | |
3680 | MODULE_LICENSE("GPL"); | |
3681 | MODULE_ALIAS_NETPROTO(PF_KEY); |