diff options
Diffstat (limited to 'net/key/af_key.c')
-rw-r--r-- | net/key/af_key.c | 2903 |
1 files changed, 2903 insertions, 0 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c new file mode 100644 index 000000000000..ce980aa94ed8 --- /dev/null +++ b/net/key/af_key.c | |||
@@ -0,0 +1,2903 @@ | |||
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 | |||
17 | #include <linux/config.h> | ||
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> | ||
29 | #include <net/xfrm.h> | ||
30 | |||
31 | #include <net/sock.h> | ||
32 | |||
33 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) | ||
34 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) | ||
35 | |||
36 | |||
37 | /* List of all pfkey sockets. */ | ||
38 | static HLIST_HEAD(pfkey_table); | ||
39 | static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); | ||
40 | static DEFINE_RWLOCK(pfkey_table_lock); | ||
41 | static atomic_t pfkey_table_users = ATOMIC_INIT(0); | ||
42 | |||
43 | static atomic_t pfkey_socks_nr = ATOMIC_INIT(0); | ||
44 | |||
45 | struct pfkey_sock { | ||
46 | /* struct sock must be the first member of struct pfkey_sock */ | ||
47 | struct sock sk; | ||
48 | int registered; | ||
49 | int promisc; | ||
50 | }; | ||
51 | |||
52 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) | ||
53 | { | ||
54 | return (struct pfkey_sock *)sk; | ||
55 | } | ||
56 | |||
57 | static void pfkey_sock_destruct(struct sock *sk) | ||
58 | { | ||
59 | skb_queue_purge(&sk->sk_receive_queue); | ||
60 | |||
61 | if (!sock_flag(sk, SOCK_DEAD)) { | ||
62 | printk("Attempt to release alive pfkey socket: %p\n", sk); | ||
63 | return; | ||
64 | } | ||
65 | |||
66 | BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc)); | ||
67 | BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc)); | ||
68 | |||
69 | atomic_dec(&pfkey_socks_nr); | ||
70 | } | ||
71 | |||
72 | static void pfkey_table_grab(void) | ||
73 | { | ||
74 | write_lock_bh(&pfkey_table_lock); | ||
75 | |||
76 | if (atomic_read(&pfkey_table_users)) { | ||
77 | DECLARE_WAITQUEUE(wait, current); | ||
78 | |||
79 | add_wait_queue_exclusive(&pfkey_table_wait, &wait); | ||
80 | for(;;) { | ||
81 | set_current_state(TASK_UNINTERRUPTIBLE); | ||
82 | if (atomic_read(&pfkey_table_users) == 0) | ||
83 | break; | ||
84 | write_unlock_bh(&pfkey_table_lock); | ||
85 | schedule(); | ||
86 | write_lock_bh(&pfkey_table_lock); | ||
87 | } | ||
88 | |||
89 | __set_current_state(TASK_RUNNING); | ||
90 | remove_wait_queue(&pfkey_table_wait, &wait); | ||
91 | } | ||
92 | } | ||
93 | |||
94 | static __inline__ void pfkey_table_ungrab(void) | ||
95 | { | ||
96 | write_unlock_bh(&pfkey_table_lock); | ||
97 | wake_up(&pfkey_table_wait); | ||
98 | } | ||
99 | |||
100 | static __inline__ void pfkey_lock_table(void) | ||
101 | { | ||
102 | /* read_lock() synchronizes us to pfkey_table_grab */ | ||
103 | |||
104 | read_lock(&pfkey_table_lock); | ||
105 | atomic_inc(&pfkey_table_users); | ||
106 | read_unlock(&pfkey_table_lock); | ||
107 | } | ||
108 | |||
109 | static __inline__ void pfkey_unlock_table(void) | ||
110 | { | ||
111 | if (atomic_dec_and_test(&pfkey_table_users)) | ||
112 | wake_up(&pfkey_table_wait); | ||
113 | } | ||
114 | |||
115 | |||
116 | static struct proto_ops pfkey_ops; | ||
117 | |||
118 | static void pfkey_insert(struct sock *sk) | ||
119 | { | ||
120 | pfkey_table_grab(); | ||
121 | sk_add_node(sk, &pfkey_table); | ||
122 | pfkey_table_ungrab(); | ||
123 | } | ||
124 | |||
125 | static void pfkey_remove(struct sock *sk) | ||
126 | { | ||
127 | pfkey_table_grab(); | ||
128 | sk_del_node_init(sk); | ||
129 | pfkey_table_ungrab(); | ||
130 | } | ||
131 | |||
132 | static struct proto key_proto = { | ||
133 | .name = "KEY", | ||
134 | .owner = THIS_MODULE, | ||
135 | .obj_size = sizeof(struct pfkey_sock), | ||
136 | }; | ||
137 | |||
138 | static int pfkey_create(struct socket *sock, int protocol) | ||
139 | { | ||
140 | struct sock *sk; | ||
141 | int err; | ||
142 | |||
143 | if (!capable(CAP_NET_ADMIN)) | ||
144 | return -EPERM; | ||
145 | if (sock->type != SOCK_RAW) | ||
146 | return -ESOCKTNOSUPPORT; | ||
147 | if (protocol != PF_KEY_V2) | ||
148 | return -EPROTONOSUPPORT; | ||
149 | |||
150 | err = -ENOMEM; | ||
151 | sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1); | ||
152 | if (sk == NULL) | ||
153 | goto out; | ||
154 | |||
155 | sock->ops = &pfkey_ops; | ||
156 | sock_init_data(sock, sk); | ||
157 | |||
158 | sk->sk_family = PF_KEY; | ||
159 | sk->sk_destruct = pfkey_sock_destruct; | ||
160 | |||
161 | atomic_inc(&pfkey_socks_nr); | ||
162 | |||
163 | pfkey_insert(sk); | ||
164 | |||
165 | return 0; | ||
166 | out: | ||
167 | return err; | ||
168 | } | ||
169 | |||
170 | static int pfkey_release(struct socket *sock) | ||
171 | { | ||
172 | struct sock *sk = sock->sk; | ||
173 | |||
174 | if (!sk) | ||
175 | return 0; | ||
176 | |||
177 | pfkey_remove(sk); | ||
178 | |||
179 | sock_orphan(sk); | ||
180 | sock->sk = NULL; | ||
181 | skb_queue_purge(&sk->sk_write_queue); | ||
182 | sock_put(sk); | ||
183 | |||
184 | return 0; | ||
185 | } | ||
186 | |||
187 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | ||
188 | int allocation, struct sock *sk) | ||
189 | { | ||
190 | int err = -ENOBUFS; | ||
191 | |||
192 | sock_hold(sk); | ||
193 | if (*skb2 == NULL) { | ||
194 | if (atomic_read(&skb->users) != 1) { | ||
195 | *skb2 = skb_clone(skb, allocation); | ||
196 | } else { | ||
197 | *skb2 = skb; | ||
198 | atomic_inc(&skb->users); | ||
199 | } | ||
200 | } | ||
201 | if (*skb2 != NULL) { | ||
202 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { | ||
203 | skb_orphan(*skb2); | ||
204 | skb_set_owner_r(*skb2, sk); | ||
205 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | ||
206 | sk->sk_data_ready(sk, (*skb2)->len); | ||
207 | *skb2 = NULL; | ||
208 | err = 0; | ||
209 | } | ||
210 | } | ||
211 | sock_put(sk); | ||
212 | return err; | ||
213 | } | ||
214 | |||
215 | /* Send SKB to all pfkey sockets matching selected criteria. */ | ||
216 | #define BROADCAST_ALL 0 | ||
217 | #define BROADCAST_ONE 1 | ||
218 | #define BROADCAST_REGISTERED 2 | ||
219 | #define BROADCAST_PROMISC_ONLY 4 | ||
220 | static int pfkey_broadcast(struct sk_buff *skb, int allocation, | ||
221 | int broadcast_flags, struct sock *one_sk) | ||
222 | { | ||
223 | struct sock *sk; | ||
224 | struct hlist_node *node; | ||
225 | struct sk_buff *skb2 = NULL; | ||
226 | int err = -ESRCH; | ||
227 | |||
228 | /* XXX Do we need something like netlink_overrun? I think | ||
229 | * XXX PF_KEY socket apps will not mind current behavior. | ||
230 | */ | ||
231 | if (!skb) | ||
232 | return -ENOMEM; | ||
233 | |||
234 | pfkey_lock_table(); | ||
235 | sk_for_each(sk, node, &pfkey_table) { | ||
236 | struct pfkey_sock *pfk = pfkey_sk(sk); | ||
237 | int err2; | ||
238 | |||
239 | /* Yes, it means that if you are meant to receive this | ||
240 | * pfkey message you receive it twice as promiscuous | ||
241 | * socket. | ||
242 | */ | ||
243 | if (pfk->promisc) | ||
244 | pfkey_broadcast_one(skb, &skb2, allocation, sk); | ||
245 | |||
246 | /* the exact target will be processed later */ | ||
247 | if (sk == one_sk) | ||
248 | continue; | ||
249 | if (broadcast_flags != BROADCAST_ALL) { | ||
250 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | ||
251 | continue; | ||
252 | if ((broadcast_flags & BROADCAST_REGISTERED) && | ||
253 | !pfk->registered) | ||
254 | continue; | ||
255 | if (broadcast_flags & BROADCAST_ONE) | ||
256 | continue; | ||
257 | } | ||
258 | |||
259 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); | ||
260 | |||
261 | /* Error is cleare after succecful sending to at least one | ||
262 | * registered KM */ | ||
263 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | ||
264 | err = err2; | ||
265 | } | ||
266 | pfkey_unlock_table(); | ||
267 | |||
268 | if (one_sk != NULL) | ||
269 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | ||
270 | |||
271 | if (skb2) | ||
272 | kfree_skb(skb2); | ||
273 | kfree_skb(skb); | ||
274 | return err; | ||
275 | } | ||
276 | |||
277 | static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) | ||
278 | { | ||
279 | *new = *orig; | ||
280 | } | ||
281 | |||
282 | static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) | ||
283 | { | ||
284 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | ||
285 | struct sadb_msg *hdr; | ||
286 | |||
287 | if (!skb) | ||
288 | return -ENOBUFS; | ||
289 | |||
290 | /* Woe be to the platform trying to support PFKEY yet | ||
291 | * having normal errnos outside the 1-255 range, inclusive. | ||
292 | */ | ||
293 | err = -err; | ||
294 | if (err == ERESTARTSYS || | ||
295 | err == ERESTARTNOHAND || | ||
296 | err == ERESTARTNOINTR) | ||
297 | err = EINTR; | ||
298 | if (err >= 512) | ||
299 | err = EINVAL; | ||
300 | if (err <= 0 || err >= 256) | ||
301 | BUG(); | ||
302 | |||
303 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | ||
304 | pfkey_hdr_dup(hdr, orig); | ||
305 | hdr->sadb_msg_errno = (uint8_t) err; | ||
306 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | ||
307 | sizeof(uint64_t)); | ||
308 | |||
309 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); | ||
310 | |||
311 | return 0; | ||
312 | } | ||
313 | |||
314 | static u8 sadb_ext_min_len[] = { | ||
315 | [SADB_EXT_RESERVED] = (u8) 0, | ||
316 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | ||
317 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | ||
318 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | ||
319 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | ||
320 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | ||
321 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | ||
322 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | ||
323 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | ||
324 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | ||
325 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | ||
326 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | ||
327 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | ||
328 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | ||
329 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | ||
330 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | ||
331 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | ||
332 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | ||
333 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | ||
334 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | ||
335 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | ||
336 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | ||
337 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | ||
338 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | ||
339 | }; | ||
340 | |||
341 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | ||
342 | static int verify_address_len(void *p) | ||
343 | { | ||
344 | struct sadb_address *sp = p; | ||
345 | struct sockaddr *addr = (struct sockaddr *)(sp + 1); | ||
346 | struct sockaddr_in *sin; | ||
347 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
348 | struct sockaddr_in6 *sin6; | ||
349 | #endif | ||
350 | int len; | ||
351 | |||
352 | switch (addr->sa_family) { | ||
353 | case AF_INET: | ||
354 | len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1); | ||
355 | len /= sizeof(uint64_t); | ||
356 | if (sp->sadb_address_len != len || | ||
357 | sp->sadb_address_prefixlen > 32) | ||
358 | return -EINVAL; | ||
359 | break; | ||
360 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
361 | case AF_INET6: | ||
362 | len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1); | ||
363 | len /= sizeof(uint64_t); | ||
364 | if (sp->sadb_address_len != len || | ||
365 | sp->sadb_address_prefixlen > 128) | ||
366 | return -EINVAL; | ||
367 | break; | ||
368 | #endif | ||
369 | default: | ||
370 | /* It is user using kernel to keep track of security | ||
371 | * associations for another protocol, such as | ||
372 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | ||
373 | * lengths. | ||
374 | * | ||
375 | * XXX Actually, association/policy database is not yet | ||
376 | * XXX able to cope with arbitrary sockaddr families. | ||
377 | * XXX When it can, remove this -EINVAL. -DaveM | ||
378 | */ | ||
379 | return -EINVAL; | ||
380 | break; | ||
381 | }; | ||
382 | |||
383 | return 0; | ||
384 | } | ||
385 | |||
386 | static int present_and_same_family(struct sadb_address *src, | ||
387 | struct sadb_address *dst) | ||
388 | { | ||
389 | struct sockaddr *s_addr, *d_addr; | ||
390 | |||
391 | if (!src || !dst) | ||
392 | return 0; | ||
393 | |||
394 | s_addr = (struct sockaddr *)(src + 1); | ||
395 | d_addr = (struct sockaddr *)(dst + 1); | ||
396 | if (s_addr->sa_family != d_addr->sa_family) | ||
397 | return 0; | ||
398 | if (s_addr->sa_family != AF_INET | ||
399 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
400 | && s_addr->sa_family != AF_INET6 | ||
401 | #endif | ||
402 | ) | ||
403 | return 0; | ||
404 | |||
405 | return 1; | ||
406 | } | ||
407 | |||
408 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
409 | { | ||
410 | char *p = (char *) hdr; | ||
411 | int len = skb->len; | ||
412 | |||
413 | len -= sizeof(*hdr); | ||
414 | p += sizeof(*hdr); | ||
415 | while (len > 0) { | ||
416 | struct sadb_ext *ehdr = (struct sadb_ext *) p; | ||
417 | uint16_t ext_type; | ||
418 | int ext_len; | ||
419 | |||
420 | ext_len = ehdr->sadb_ext_len; | ||
421 | ext_len *= sizeof(uint64_t); | ||
422 | ext_type = ehdr->sadb_ext_type; | ||
423 | if (ext_len < sizeof(uint64_t) || | ||
424 | ext_len > len || | ||
425 | ext_type == SADB_EXT_RESERVED) | ||
426 | return -EINVAL; | ||
427 | |||
428 | if (ext_type <= SADB_EXT_MAX) { | ||
429 | int min = (int) sadb_ext_min_len[ext_type]; | ||
430 | if (ext_len < min) | ||
431 | return -EINVAL; | ||
432 | if (ext_hdrs[ext_type-1] != NULL) | ||
433 | return -EINVAL; | ||
434 | if (ext_type == SADB_EXT_ADDRESS_SRC || | ||
435 | ext_type == SADB_EXT_ADDRESS_DST || | ||
436 | ext_type == SADB_EXT_ADDRESS_PROXY || | ||
437 | ext_type == SADB_X_EXT_NAT_T_OA) { | ||
438 | if (verify_address_len(p)) | ||
439 | return -EINVAL; | ||
440 | } | ||
441 | ext_hdrs[ext_type-1] = p; | ||
442 | } | ||
443 | p += ext_len; | ||
444 | len -= ext_len; | ||
445 | } | ||
446 | |||
447 | return 0; | ||
448 | } | ||
449 | |||
450 | static uint16_t | ||
451 | pfkey_satype2proto(uint8_t satype) | ||
452 | { | ||
453 | switch (satype) { | ||
454 | case SADB_SATYPE_UNSPEC: | ||
455 | return IPSEC_PROTO_ANY; | ||
456 | case SADB_SATYPE_AH: | ||
457 | return IPPROTO_AH; | ||
458 | case SADB_SATYPE_ESP: | ||
459 | return IPPROTO_ESP; | ||
460 | case SADB_X_SATYPE_IPCOMP: | ||
461 | return IPPROTO_COMP; | ||
462 | break; | ||
463 | default: | ||
464 | return 0; | ||
465 | } | ||
466 | /* NOTREACHED */ | ||
467 | } | ||
468 | |||
469 | static uint8_t | ||
470 | pfkey_proto2satype(uint16_t proto) | ||
471 | { | ||
472 | switch (proto) { | ||
473 | case IPPROTO_AH: | ||
474 | return SADB_SATYPE_AH; | ||
475 | case IPPROTO_ESP: | ||
476 | return SADB_SATYPE_ESP; | ||
477 | case IPPROTO_COMP: | ||
478 | return SADB_X_SATYPE_IPCOMP; | ||
479 | break; | ||
480 | default: | ||
481 | return 0; | ||
482 | } | ||
483 | /* NOTREACHED */ | ||
484 | } | ||
485 | |||
486 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | ||
487 | * say specifically 'just raw sockets' as we encode them as 255. | ||
488 | */ | ||
489 | |||
490 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | ||
491 | { | ||
492 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); | ||
493 | } | ||
494 | |||
495 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | ||
496 | { | ||
497 | return (proto ? proto : IPSEC_PROTO_ANY); | ||
498 | } | ||
499 | |||
500 | static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, | ||
501 | xfrm_address_t *xaddr) | ||
502 | { | ||
503 | switch (((struct sockaddr*)(addr + 1))->sa_family) { | ||
504 | case AF_INET: | ||
505 | xaddr->a4 = | ||
506 | ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr; | ||
507 | return AF_INET; | ||
508 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
509 | case AF_INET6: | ||
510 | memcpy(xaddr->a6, | ||
511 | &((struct sockaddr_in6 *)(addr + 1))->sin6_addr, | ||
512 | sizeof(struct in6_addr)); | ||
513 | return AF_INET6; | ||
514 | #endif | ||
515 | default: | ||
516 | return 0; | ||
517 | } | ||
518 | /* NOTREACHED */ | ||
519 | } | ||
520 | |||
521 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) | ||
522 | { | ||
523 | struct sadb_sa *sa; | ||
524 | struct sadb_address *addr; | ||
525 | uint16_t proto; | ||
526 | unsigned short family; | ||
527 | xfrm_address_t *xaddr; | ||
528 | |||
529 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | ||
530 | if (sa == NULL) | ||
531 | return NULL; | ||
532 | |||
533 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | ||
534 | if (proto == 0) | ||
535 | return NULL; | ||
536 | |||
537 | /* sadb_address_len should be checked by caller */ | ||
538 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | ||
539 | if (addr == NULL) | ||
540 | return NULL; | ||
541 | |||
542 | family = ((struct sockaddr *)(addr + 1))->sa_family; | ||
543 | switch (family) { | ||
544 | case AF_INET: | ||
545 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; | ||
546 | break; | ||
547 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
548 | case AF_INET6: | ||
549 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; | ||
550 | break; | ||
551 | #endif | ||
552 | default: | ||
553 | xaddr = NULL; | ||
554 | } | ||
555 | |||
556 | if (!xaddr) | ||
557 | return NULL; | ||
558 | |||
559 | return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); | ||
560 | } | ||
561 | |||
562 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | ||
563 | static int | ||
564 | pfkey_sockaddr_size(sa_family_t family) | ||
565 | { | ||
566 | switch (family) { | ||
567 | case AF_INET: | ||
568 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in)); | ||
569 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
570 | case AF_INET6: | ||
571 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in6)); | ||
572 | #endif | ||
573 | default: | ||
574 | return 0; | ||
575 | } | ||
576 | /* NOTREACHED */ | ||
577 | } | ||
578 | |||
579 | static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc) | ||
580 | { | ||
581 | struct sk_buff *skb; | ||
582 | struct sadb_msg *hdr; | ||
583 | struct sadb_sa *sa; | ||
584 | struct sadb_lifetime *lifetime; | ||
585 | struct sadb_address *addr; | ||
586 | struct sadb_key *key; | ||
587 | struct sadb_x_sa2 *sa2; | ||
588 | struct sockaddr_in *sin; | ||
589 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
590 | struct sockaddr_in6 *sin6; | ||
591 | #endif | ||
592 | int size; | ||
593 | int auth_key_size = 0; | ||
594 | int encrypt_key_size = 0; | ||
595 | int sockaddr_size; | ||
596 | struct xfrm_encap_tmpl *natt = NULL; | ||
597 | |||
598 | /* address family check */ | ||
599 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | ||
600 | if (!sockaddr_size) | ||
601 | return ERR_PTR(-EINVAL); | ||
602 | |||
603 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | ||
604 | key(AE), (identity(SD),) (sensitivity)> */ | ||
605 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + | ||
606 | sizeof(struct sadb_lifetime) + | ||
607 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | ||
608 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | ||
609 | sizeof(struct sadb_address)*2 + | ||
610 | sockaddr_size*2 + | ||
611 | sizeof(struct sadb_x_sa2); | ||
612 | /* identity & sensitivity */ | ||
613 | |||
614 | if ((x->props.family == AF_INET && | ||
615 | x->sel.saddr.a4 != x->props.saddr.a4) | ||
616 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
617 | || (x->props.family == AF_INET6 && | ||
618 | memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr))) | ||
619 | #endif | ||
620 | ) | ||
621 | size += sizeof(struct sadb_address) + sockaddr_size; | ||
622 | |||
623 | if (add_keys) { | ||
624 | if (x->aalg && x->aalg->alg_key_len) { | ||
625 | auth_key_size = | ||
626 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | ||
627 | size += sizeof(struct sadb_key) + auth_key_size; | ||
628 | } | ||
629 | if (x->ealg && x->ealg->alg_key_len) { | ||
630 | encrypt_key_size = | ||
631 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | ||
632 | size += sizeof(struct sadb_key) + encrypt_key_size; | ||
633 | } | ||
634 | } | ||
635 | if (x->encap) | ||
636 | natt = x->encap; | ||
637 | |||
638 | if (natt && natt->encap_type) { | ||
639 | size += sizeof(struct sadb_x_nat_t_type); | ||
640 | size += sizeof(struct sadb_x_nat_t_port); | ||
641 | size += sizeof(struct sadb_x_nat_t_port); | ||
642 | } | ||
643 | |||
644 | skb = alloc_skb(size + 16, GFP_ATOMIC); | ||
645 | if (skb == NULL) | ||
646 | return ERR_PTR(-ENOBUFS); | ||
647 | |||
648 | /* call should fill header later */ | ||
649 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | ||
650 | memset(hdr, 0, size); /* XXX do we need this ? */ | ||
651 | hdr->sadb_msg_len = size / sizeof(uint64_t); | ||
652 | |||
653 | /* sa */ | ||
654 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | ||
655 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | ||
656 | sa->sadb_sa_exttype = SADB_EXT_SA; | ||
657 | sa->sadb_sa_spi = x->id.spi; | ||
658 | sa->sadb_sa_replay = x->props.replay_window; | ||
659 | sa->sadb_sa_state = SADB_SASTATE_DYING; | ||
660 | if (x->km.state == XFRM_STATE_VALID && !x->km.dying) | ||
661 | sa->sadb_sa_state = SADB_SASTATE_MATURE; | ||
662 | else if (x->km.state == XFRM_STATE_ACQ) | ||
663 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; | ||
664 | else if (x->km.state == XFRM_STATE_EXPIRED) | ||
665 | sa->sadb_sa_state = SADB_SASTATE_DEAD; | ||
666 | sa->sadb_sa_auth = 0; | ||
667 | if (x->aalg) { | ||
668 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | ||
669 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | ||
670 | } | ||
671 | sa->sadb_sa_encrypt = 0; | ||
672 | BUG_ON(x->ealg && x->calg); | ||
673 | if (x->ealg) { | ||
674 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | ||
675 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | ||
676 | } | ||
677 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | ||
678 | if (x->calg) { | ||
679 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | ||
680 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | ||
681 | } | ||
682 | |||
683 | sa->sadb_sa_flags = 0; | ||
684 | if (x->props.flags & XFRM_STATE_NOECN) | ||
685 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | ||
686 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | ||
687 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | ||
688 | |||
689 | /* hard time */ | ||
690 | if (hsc & 2) { | ||
691 | lifetime = (struct sadb_lifetime *) skb_put(skb, | ||
692 | sizeof(struct sadb_lifetime)); | ||
693 | lifetime->sadb_lifetime_len = | ||
694 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | ||
695 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | ||
696 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | ||
697 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | ||
698 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | ||
699 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | ||
700 | } | ||
701 | /* soft time */ | ||
702 | if (hsc & 1) { | ||
703 | lifetime = (struct sadb_lifetime *) skb_put(skb, | ||
704 | sizeof(struct sadb_lifetime)); | ||
705 | lifetime->sadb_lifetime_len = | ||
706 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | ||
707 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | ||
708 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | ||
709 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | ||
710 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | ||
711 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | ||
712 | } | ||
713 | /* current time */ | ||
714 | lifetime = (struct sadb_lifetime *) skb_put(skb, | ||
715 | sizeof(struct sadb_lifetime)); | ||
716 | lifetime->sadb_lifetime_len = | ||
717 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | ||
718 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | ||
719 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | ||
720 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | ||
721 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | ||
722 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | ||
723 | /* src address */ | ||
724 | addr = (struct sadb_address*) skb_put(skb, | ||
725 | sizeof(struct sadb_address)+sockaddr_size); | ||
726 | addr->sadb_address_len = | ||
727 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
728 | sizeof(uint64_t); | ||
729 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | ||
730 | /* "if the ports are non-zero, then the sadb_address_proto field, | ||
731 | normally zero, MUST be filled in with the transport | ||
732 | protocol's number." - RFC2367 */ | ||
733 | addr->sadb_address_proto = 0; | ||
734 | addr->sadb_address_reserved = 0; | ||
735 | if (x->props.family == AF_INET) { | ||
736 | addr->sadb_address_prefixlen = 32; | ||
737 | |||
738 | sin = (struct sockaddr_in *) (addr + 1); | ||
739 | sin->sin_family = AF_INET; | ||
740 | sin->sin_addr.s_addr = x->props.saddr.a4; | ||
741 | sin->sin_port = 0; | ||
742 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
743 | } | ||
744 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
745 | else if (x->props.family == AF_INET6) { | ||
746 | addr->sadb_address_prefixlen = 128; | ||
747 | |||
748 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
749 | sin6->sin6_family = AF_INET6; | ||
750 | sin6->sin6_port = 0; | ||
751 | sin6->sin6_flowinfo = 0; | ||
752 | memcpy(&sin6->sin6_addr, x->props.saddr.a6, | ||
753 | sizeof(struct in6_addr)); | ||
754 | sin6->sin6_scope_id = 0; | ||
755 | } | ||
756 | #endif | ||
757 | else | ||
758 | BUG(); | ||
759 | |||
760 | /* dst address */ | ||
761 | addr = (struct sadb_address*) skb_put(skb, | ||
762 | sizeof(struct sadb_address)+sockaddr_size); | ||
763 | addr->sadb_address_len = | ||
764 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
765 | sizeof(uint64_t); | ||
766 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | ||
767 | addr->sadb_address_proto = 0; | ||
768 | addr->sadb_address_prefixlen = 32; /* XXX */ | ||
769 | addr->sadb_address_reserved = 0; | ||
770 | if (x->props.family == AF_INET) { | ||
771 | sin = (struct sockaddr_in *) (addr + 1); | ||
772 | sin->sin_family = AF_INET; | ||
773 | sin->sin_addr.s_addr = x->id.daddr.a4; | ||
774 | sin->sin_port = 0; | ||
775 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
776 | |||
777 | if (x->sel.saddr.a4 != x->props.saddr.a4) { | ||
778 | addr = (struct sadb_address*) skb_put(skb, | ||
779 | sizeof(struct sadb_address)+sockaddr_size); | ||
780 | addr->sadb_address_len = | ||
781 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
782 | sizeof(uint64_t); | ||
783 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | ||
784 | addr->sadb_address_proto = | ||
785 | pfkey_proto_from_xfrm(x->sel.proto); | ||
786 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | ||
787 | addr->sadb_address_reserved = 0; | ||
788 | |||
789 | sin = (struct sockaddr_in *) (addr + 1); | ||
790 | sin->sin_family = AF_INET; | ||
791 | sin->sin_addr.s_addr = x->sel.saddr.a4; | ||
792 | sin->sin_port = x->sel.sport; | ||
793 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
794 | } | ||
795 | } | ||
796 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
797 | else if (x->props.family == AF_INET6) { | ||
798 | addr->sadb_address_prefixlen = 128; | ||
799 | |||
800 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
801 | sin6->sin6_family = AF_INET6; | ||
802 | sin6->sin6_port = 0; | ||
803 | sin6->sin6_flowinfo = 0; | ||
804 | memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr)); | ||
805 | sin6->sin6_scope_id = 0; | ||
806 | |||
807 | if (memcmp (x->sel.saddr.a6, x->props.saddr.a6, | ||
808 | sizeof(struct in6_addr))) { | ||
809 | addr = (struct sadb_address *) skb_put(skb, | ||
810 | sizeof(struct sadb_address)+sockaddr_size); | ||
811 | addr->sadb_address_len = | ||
812 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
813 | sizeof(uint64_t); | ||
814 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | ||
815 | addr->sadb_address_proto = | ||
816 | pfkey_proto_from_xfrm(x->sel.proto); | ||
817 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | ||
818 | addr->sadb_address_reserved = 0; | ||
819 | |||
820 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
821 | sin6->sin6_family = AF_INET6; | ||
822 | sin6->sin6_port = x->sel.sport; | ||
823 | sin6->sin6_flowinfo = 0; | ||
824 | memcpy(&sin6->sin6_addr, x->sel.saddr.a6, | ||
825 | sizeof(struct in6_addr)); | ||
826 | sin6->sin6_scope_id = 0; | ||
827 | } | ||
828 | } | ||
829 | #endif | ||
830 | else | ||
831 | BUG(); | ||
832 | |||
833 | /* auth key */ | ||
834 | if (add_keys && auth_key_size) { | ||
835 | key = (struct sadb_key *) skb_put(skb, | ||
836 | sizeof(struct sadb_key)+auth_key_size); | ||
837 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | ||
838 | sizeof(uint64_t); | ||
839 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | ||
840 | key->sadb_key_bits = x->aalg->alg_key_len; | ||
841 | key->sadb_key_reserved = 0; | ||
842 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | ||
843 | } | ||
844 | /* encrypt key */ | ||
845 | if (add_keys && encrypt_key_size) { | ||
846 | key = (struct sadb_key *) skb_put(skb, | ||
847 | sizeof(struct sadb_key)+encrypt_key_size); | ||
848 | key->sadb_key_len = (sizeof(struct sadb_key) + | ||
849 | encrypt_key_size) / sizeof(uint64_t); | ||
850 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | ||
851 | key->sadb_key_bits = x->ealg->alg_key_len; | ||
852 | key->sadb_key_reserved = 0; | ||
853 | memcpy(key + 1, x->ealg->alg_key, | ||
854 | (x->ealg->alg_key_len+7)/8); | ||
855 | } | ||
856 | |||
857 | /* sa */ | ||
858 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | ||
859 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | ||
860 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | ||
861 | sa2->sadb_x_sa2_mode = x->props.mode + 1; | ||
862 | sa2->sadb_x_sa2_reserved1 = 0; | ||
863 | sa2->sadb_x_sa2_reserved2 = 0; | ||
864 | sa2->sadb_x_sa2_sequence = 0; | ||
865 | sa2->sadb_x_sa2_reqid = x->props.reqid; | ||
866 | |||
867 | if (natt && natt->encap_type) { | ||
868 | struct sadb_x_nat_t_type *n_type; | ||
869 | struct sadb_x_nat_t_port *n_port; | ||
870 | |||
871 | /* type */ | ||
872 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | ||
873 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | ||
874 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | ||
875 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | ||
876 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | ||
877 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | ||
878 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | ||
879 | |||
880 | /* source port */ | ||
881 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | ||
882 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | ||
883 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | ||
884 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | ||
885 | n_port->sadb_x_nat_t_port_reserved = 0; | ||
886 | |||
887 | /* dest port */ | ||
888 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | ||
889 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | ||
890 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | ||
891 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | ||
892 | n_port->sadb_x_nat_t_port_reserved = 0; | ||
893 | } | ||
894 | |||
895 | return skb; | ||
896 | } | ||
897 | |||
898 | static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, | ||
899 | void **ext_hdrs) | ||
900 | { | ||
901 | struct xfrm_state *x; | ||
902 | struct sadb_lifetime *lifetime; | ||
903 | struct sadb_sa *sa; | ||
904 | struct sadb_key *key; | ||
905 | uint16_t proto; | ||
906 | int err; | ||
907 | |||
908 | |||
909 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | ||
910 | if (!sa || | ||
911 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
912 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | ||
913 | return ERR_PTR(-EINVAL); | ||
914 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | ||
915 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | ||
916 | return ERR_PTR(-EINVAL); | ||
917 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | ||
918 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | ||
919 | return ERR_PTR(-EINVAL); | ||
920 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | ||
921 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | ||
922 | return ERR_PTR(-EINVAL); | ||
923 | |||
924 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | ||
925 | if (proto == 0) | ||
926 | return ERR_PTR(-EINVAL); | ||
927 | |||
928 | /* default error is no buffer space */ | ||
929 | err = -ENOBUFS; | ||
930 | |||
931 | /* RFC2367: | ||
932 | |||
933 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | ||
934 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | ||
935 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | ||
936 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | ||
937 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | ||
938 | not true. | ||
939 | |||
940 | However, KAME setkey always uses SADB_SASTATE_LARVAL. | ||
941 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. | ||
942 | */ | ||
943 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | ||
944 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | ||
945 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | ||
946 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | ||
947 | return ERR_PTR(-EINVAL); | ||
948 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | ||
949 | if (key != NULL && | ||
950 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | ||
951 | ((key->sadb_key_bits+7) / 8 == 0 || | ||
952 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | ||
953 | return ERR_PTR(-EINVAL); | ||
954 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | ||
955 | if (key != NULL && | ||
956 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | ||
957 | ((key->sadb_key_bits+7) / 8 == 0 || | ||
958 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | ||
959 | return ERR_PTR(-EINVAL); | ||
960 | |||
961 | x = xfrm_state_alloc(); | ||
962 | if (x == NULL) | ||
963 | return ERR_PTR(-ENOBUFS); | ||
964 | |||
965 | x->id.proto = proto; | ||
966 | x->id.spi = sa->sadb_sa_spi; | ||
967 | x->props.replay_window = sa->sadb_sa_replay; | ||
968 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | ||
969 | x->props.flags |= XFRM_STATE_NOECN; | ||
970 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | ||
971 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | ||
972 | |||
973 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; | ||
974 | if (lifetime != NULL) { | ||
975 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | ||
976 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | ||
977 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | ||
978 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | ||
979 | } | ||
980 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; | ||
981 | if (lifetime != NULL) { | ||
982 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | ||
983 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | ||
984 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | ||
985 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | ||
986 | } | ||
987 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | ||
988 | if (sa->sadb_sa_auth) { | ||
989 | int keysize = 0; | ||
990 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | ||
991 | if (!a) { | ||
992 | err = -ENOSYS; | ||
993 | goto out; | ||
994 | } | ||
995 | if (key) | ||
996 | keysize = (key->sadb_key_bits + 7) / 8; | ||
997 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | ||
998 | if (!x->aalg) | ||
999 | goto out; | ||
1000 | strcpy(x->aalg->alg_name, a->name); | ||
1001 | x->aalg->alg_key_len = 0; | ||
1002 | if (key) { | ||
1003 | x->aalg->alg_key_len = key->sadb_key_bits; | ||
1004 | memcpy(x->aalg->alg_key, key+1, keysize); | ||
1005 | } | ||
1006 | x->props.aalgo = sa->sadb_sa_auth; | ||
1007 | /* x->algo.flags = sa->sadb_sa_flags; */ | ||
1008 | } | ||
1009 | if (sa->sadb_sa_encrypt) { | ||
1010 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | ||
1011 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | ||
1012 | if (!a) { | ||
1013 | err = -ENOSYS; | ||
1014 | goto out; | ||
1015 | } | ||
1016 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | ||
1017 | if (!x->calg) | ||
1018 | goto out; | ||
1019 | strcpy(x->calg->alg_name, a->name); | ||
1020 | x->props.calgo = sa->sadb_sa_encrypt; | ||
1021 | } else { | ||
1022 | int keysize = 0; | ||
1023 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | ||
1024 | if (!a) { | ||
1025 | err = -ENOSYS; | ||
1026 | goto out; | ||
1027 | } | ||
1028 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | ||
1029 | if (key) | ||
1030 | keysize = (key->sadb_key_bits + 7) / 8; | ||
1031 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | ||
1032 | if (!x->ealg) | ||
1033 | goto out; | ||
1034 | strcpy(x->ealg->alg_name, a->name); | ||
1035 | x->ealg->alg_key_len = 0; | ||
1036 | if (key) { | ||
1037 | x->ealg->alg_key_len = key->sadb_key_bits; | ||
1038 | memcpy(x->ealg->alg_key, key+1, keysize); | ||
1039 | } | ||
1040 | x->props.ealgo = sa->sadb_sa_encrypt; | ||
1041 | } | ||
1042 | } | ||
1043 | /* x->algo.flags = sa->sadb_sa_flags; */ | ||
1044 | |||
1045 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1046 | &x->props.saddr); | ||
1047 | if (!x->props.family) { | ||
1048 | err = -EAFNOSUPPORT; | ||
1049 | goto out; | ||
1050 | } | ||
1051 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], | ||
1052 | &x->id.daddr); | ||
1053 | |||
1054 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | ||
1055 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; | ||
1056 | x->props.mode = sa2->sadb_x_sa2_mode; | ||
1057 | if (x->props.mode) | ||
1058 | x->props.mode--; | ||
1059 | x->props.reqid = sa2->sadb_x_sa2_reqid; | ||
1060 | } | ||
1061 | |||
1062 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | ||
1063 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; | ||
1064 | |||
1065 | /* Nobody uses this, but we try. */ | ||
1066 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | ||
1067 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | ||
1068 | } | ||
1069 | |||
1070 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { | ||
1071 | struct sadb_x_nat_t_type* n_type; | ||
1072 | struct xfrm_encap_tmpl *natt; | ||
1073 | |||
1074 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | ||
1075 | if (!x->encap) | ||
1076 | goto out; | ||
1077 | |||
1078 | natt = x->encap; | ||
1079 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | ||
1080 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | ||
1081 | |||
1082 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | ||
1083 | struct sadb_x_nat_t_port* n_port = | ||
1084 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; | ||
1085 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | ||
1086 | } | ||
1087 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | ||
1088 | struct sadb_x_nat_t_port* n_port = | ||
1089 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; | ||
1090 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | ||
1091 | } | ||
1092 | } | ||
1093 | |||
1094 | x->type = xfrm_get_type(proto, x->props.family); | ||
1095 | if (x->type == NULL) { | ||
1096 | err = -ENOPROTOOPT; | ||
1097 | goto out; | ||
1098 | } | ||
1099 | if (x->type->init_state(x, NULL)) { | ||
1100 | err = -EINVAL; | ||
1101 | goto out; | ||
1102 | } | ||
1103 | x->km.seq = hdr->sadb_msg_seq; | ||
1104 | x->km.state = XFRM_STATE_VALID; | ||
1105 | return x; | ||
1106 | |||
1107 | out: | ||
1108 | x->km.state = XFRM_STATE_DEAD; | ||
1109 | xfrm_state_put(x); | ||
1110 | return ERR_PTR(err); | ||
1111 | } | ||
1112 | |||
1113 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1114 | { | ||
1115 | return -EOPNOTSUPP; | ||
1116 | } | ||
1117 | |||
1118 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1119 | { | ||
1120 | struct sk_buff *resp_skb; | ||
1121 | struct sadb_x_sa2 *sa2; | ||
1122 | struct sadb_address *saddr, *daddr; | ||
1123 | struct sadb_msg *out_hdr; | ||
1124 | struct xfrm_state *x = NULL; | ||
1125 | u8 mode; | ||
1126 | u32 reqid; | ||
1127 | u8 proto; | ||
1128 | unsigned short family; | ||
1129 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | ||
1130 | |||
1131 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1132 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | ||
1133 | return -EINVAL; | ||
1134 | |||
1135 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | ||
1136 | if (proto == 0) | ||
1137 | return -EINVAL; | ||
1138 | |||
1139 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | ||
1140 | mode = sa2->sadb_x_sa2_mode - 1; | ||
1141 | reqid = sa2->sadb_x_sa2_reqid; | ||
1142 | } else { | ||
1143 | mode = 0; | ||
1144 | reqid = 0; | ||
1145 | } | ||
1146 | |||
1147 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | ||
1148 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | ||
1149 | |||
1150 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | ||
1151 | switch (family) { | ||
1152 | case AF_INET: | ||
1153 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | ||
1154 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | ||
1155 | break; | ||
1156 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
1157 | case AF_INET6: | ||
1158 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | ||
1159 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | ||
1160 | break; | ||
1161 | #endif | ||
1162 | } | ||
1163 | |||
1164 | if (hdr->sadb_msg_seq) { | ||
1165 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | ||
1166 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { | ||
1167 | xfrm_state_put(x); | ||
1168 | x = NULL; | ||
1169 | } | ||
1170 | } | ||
1171 | |||
1172 | if (!x) | ||
1173 | x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); | ||
1174 | |||
1175 | if (x == NULL) | ||
1176 | return -ENOENT; | ||
1177 | |||
1178 | resp_skb = ERR_PTR(-ENOENT); | ||
1179 | |||
1180 | spin_lock_bh(&x->lock); | ||
1181 | if (x->km.state != XFRM_STATE_DEAD) { | ||
1182 | struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1]; | ||
1183 | u32 min_spi, max_spi; | ||
1184 | |||
1185 | if (range != NULL) { | ||
1186 | min_spi = range->sadb_spirange_min; | ||
1187 | max_spi = range->sadb_spirange_max; | ||
1188 | } else { | ||
1189 | min_spi = 0x100; | ||
1190 | max_spi = 0x0fffffff; | ||
1191 | } | ||
1192 | xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi)); | ||
1193 | if (x->id.spi) | ||
1194 | resp_skb = pfkey_xfrm_state2msg(x, 0, 3); | ||
1195 | } | ||
1196 | spin_unlock_bh(&x->lock); | ||
1197 | |||
1198 | if (IS_ERR(resp_skb)) { | ||
1199 | xfrm_state_put(x); | ||
1200 | return PTR_ERR(resp_skb); | ||
1201 | } | ||
1202 | |||
1203 | out_hdr = (struct sadb_msg *) resp_skb->data; | ||
1204 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | ||
1205 | out_hdr->sadb_msg_type = SADB_GETSPI; | ||
1206 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | ||
1207 | out_hdr->sadb_msg_errno = 0; | ||
1208 | out_hdr->sadb_msg_reserved = 0; | ||
1209 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | ||
1210 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | ||
1211 | |||
1212 | xfrm_state_put(x); | ||
1213 | |||
1214 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); | ||
1215 | |||
1216 | return 0; | ||
1217 | } | ||
1218 | |||
1219 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1220 | { | ||
1221 | struct xfrm_state *x; | ||
1222 | |||
1223 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | ||
1224 | return -EOPNOTSUPP; | ||
1225 | |||
1226 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | ||
1227 | return 0; | ||
1228 | |||
1229 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | ||
1230 | if (x == NULL) | ||
1231 | return 0; | ||
1232 | |||
1233 | spin_lock_bh(&x->lock); | ||
1234 | if (x->km.state == XFRM_STATE_ACQ) { | ||
1235 | x->km.state = XFRM_STATE_ERROR; | ||
1236 | wake_up(&km_waitq); | ||
1237 | } | ||
1238 | spin_unlock_bh(&x->lock); | ||
1239 | xfrm_state_put(x); | ||
1240 | return 0; | ||
1241 | } | ||
1242 | |||
1243 | |||
1244 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1245 | { | ||
1246 | struct sk_buff *out_skb; | ||
1247 | struct sadb_msg *out_hdr; | ||
1248 | struct xfrm_state *x; | ||
1249 | int err; | ||
1250 | |||
1251 | xfrm_probe_algs(); | ||
1252 | |||
1253 | x = pfkey_msg2xfrm_state(hdr, ext_hdrs); | ||
1254 | if (IS_ERR(x)) | ||
1255 | return PTR_ERR(x); | ||
1256 | |||
1257 | if (hdr->sadb_msg_type == SADB_ADD) | ||
1258 | err = xfrm_state_add(x); | ||
1259 | else | ||
1260 | err = xfrm_state_update(x); | ||
1261 | |||
1262 | if (err < 0) { | ||
1263 | x->km.state = XFRM_STATE_DEAD; | ||
1264 | xfrm_state_put(x); | ||
1265 | return err; | ||
1266 | } | ||
1267 | |||
1268 | out_skb = pfkey_xfrm_state2msg(x, 0, 3); | ||
1269 | if (IS_ERR(out_skb)) | ||
1270 | return PTR_ERR(out_skb); /* XXX Should we return 0 here ? */ | ||
1271 | |||
1272 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
1273 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | ||
1274 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; | ||
1275 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | ||
1276 | out_hdr->sadb_msg_errno = 0; | ||
1277 | out_hdr->sadb_msg_reserved = 0; | ||
1278 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | ||
1279 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | ||
1280 | |||
1281 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); | ||
1282 | |||
1283 | return 0; | ||
1284 | } | ||
1285 | |||
1286 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1287 | { | ||
1288 | struct xfrm_state *x; | ||
1289 | |||
1290 | if (!ext_hdrs[SADB_EXT_SA-1] || | ||
1291 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1292 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | ||
1293 | return -EINVAL; | ||
1294 | |||
1295 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | ||
1296 | if (x == NULL) | ||
1297 | return -ESRCH; | ||
1298 | |||
1299 | if (xfrm_state_kern(x)) { | ||
1300 | xfrm_state_put(x); | ||
1301 | return -EPERM; | ||
1302 | } | ||
1303 | |||
1304 | xfrm_state_delete(x); | ||
1305 | xfrm_state_put(x); | ||
1306 | |||
1307 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | ||
1308 | BROADCAST_ALL, sk); | ||
1309 | |||
1310 | return 0; | ||
1311 | } | ||
1312 | |||
1313 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1314 | { | ||
1315 | __u8 proto; | ||
1316 | struct sk_buff *out_skb; | ||
1317 | struct sadb_msg *out_hdr; | ||
1318 | struct xfrm_state *x; | ||
1319 | |||
1320 | if (!ext_hdrs[SADB_EXT_SA-1] || | ||
1321 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1322 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | ||
1323 | return -EINVAL; | ||
1324 | |||
1325 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | ||
1326 | if (x == NULL) | ||
1327 | return -ESRCH; | ||
1328 | |||
1329 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | ||
1330 | proto = x->id.proto; | ||
1331 | xfrm_state_put(x); | ||
1332 | if (IS_ERR(out_skb)) | ||
1333 | return PTR_ERR(out_skb); | ||
1334 | |||
1335 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
1336 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | ||
1337 | out_hdr->sadb_msg_type = SADB_DUMP; | ||
1338 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | ||
1339 | out_hdr->sadb_msg_errno = 0; | ||
1340 | out_hdr->sadb_msg_reserved = 0; | ||
1341 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | ||
1342 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | ||
1343 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); | ||
1344 | |||
1345 | return 0; | ||
1346 | } | ||
1347 | |||
1348 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, int allocation) | ||
1349 | { | ||
1350 | struct sk_buff *skb; | ||
1351 | struct sadb_msg *hdr; | ||
1352 | int len, auth_len, enc_len, i; | ||
1353 | |||
1354 | auth_len = xfrm_count_auth_supported(); | ||
1355 | if (auth_len) { | ||
1356 | auth_len *= sizeof(struct sadb_alg); | ||
1357 | auth_len += sizeof(struct sadb_supported); | ||
1358 | } | ||
1359 | |||
1360 | enc_len = xfrm_count_enc_supported(); | ||
1361 | if (enc_len) { | ||
1362 | enc_len *= sizeof(struct sadb_alg); | ||
1363 | enc_len += sizeof(struct sadb_supported); | ||
1364 | } | ||
1365 | |||
1366 | len = enc_len + auth_len + sizeof(struct sadb_msg); | ||
1367 | |||
1368 | skb = alloc_skb(len + 16, allocation); | ||
1369 | if (!skb) | ||
1370 | goto out_put_algs; | ||
1371 | |||
1372 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | ||
1373 | pfkey_hdr_dup(hdr, orig); | ||
1374 | hdr->sadb_msg_errno = 0; | ||
1375 | hdr->sadb_msg_len = len / sizeof(uint64_t); | ||
1376 | |||
1377 | if (auth_len) { | ||
1378 | struct sadb_supported *sp; | ||
1379 | struct sadb_alg *ap; | ||
1380 | |||
1381 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | ||
1382 | ap = (struct sadb_alg *) (sp + 1); | ||
1383 | |||
1384 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | ||
1385 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | ||
1386 | |||
1387 | for (i = 0; ; i++) { | ||
1388 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | ||
1389 | if (!aalg) | ||
1390 | break; | ||
1391 | if (aalg->available) | ||
1392 | *ap++ = aalg->desc; | ||
1393 | } | ||
1394 | } | ||
1395 | |||
1396 | if (enc_len) { | ||
1397 | struct sadb_supported *sp; | ||
1398 | struct sadb_alg *ap; | ||
1399 | |||
1400 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | ||
1401 | ap = (struct sadb_alg *) (sp + 1); | ||
1402 | |||
1403 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | ||
1404 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | ||
1405 | |||
1406 | for (i = 0; ; i++) { | ||
1407 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | ||
1408 | if (!ealg) | ||
1409 | break; | ||
1410 | if (ealg->available) | ||
1411 | *ap++ = ealg->desc; | ||
1412 | } | ||
1413 | } | ||
1414 | |||
1415 | out_put_algs: | ||
1416 | return skb; | ||
1417 | } | ||
1418 | |||
1419 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1420 | { | ||
1421 | struct pfkey_sock *pfk = pfkey_sk(sk); | ||
1422 | struct sk_buff *supp_skb; | ||
1423 | |||
1424 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | ||
1425 | return -EINVAL; | ||
1426 | |||
1427 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | ||
1428 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | ||
1429 | return -EEXIST; | ||
1430 | pfk->registered |= (1<<hdr->sadb_msg_satype); | ||
1431 | } | ||
1432 | |||
1433 | xfrm_probe_algs(); | ||
1434 | |||
1435 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); | ||
1436 | if (!supp_skb) { | ||
1437 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | ||
1438 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | ||
1439 | |||
1440 | return -ENOBUFS; | ||
1441 | } | ||
1442 | |||
1443 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); | ||
1444 | |||
1445 | return 0; | ||
1446 | } | ||
1447 | |||
1448 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1449 | { | ||
1450 | unsigned proto; | ||
1451 | struct sk_buff *skb_out; | ||
1452 | struct sadb_msg *hdr_out; | ||
1453 | |||
1454 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | ||
1455 | if (proto == 0) | ||
1456 | return -EINVAL; | ||
1457 | |||
1458 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | ||
1459 | if (!skb_out) | ||
1460 | return -ENOBUFS; | ||
1461 | |||
1462 | xfrm_state_flush(proto); | ||
1463 | |||
1464 | hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); | ||
1465 | pfkey_hdr_dup(hdr_out, hdr); | ||
1466 | hdr_out->sadb_msg_errno = (uint8_t) 0; | ||
1467 | hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | ||
1468 | |||
1469 | pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL); | ||
1470 | |||
1471 | return 0; | ||
1472 | } | ||
1473 | |||
1474 | struct pfkey_dump_data | ||
1475 | { | ||
1476 | struct sk_buff *skb; | ||
1477 | struct sadb_msg *hdr; | ||
1478 | struct sock *sk; | ||
1479 | }; | ||
1480 | |||
1481 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) | ||
1482 | { | ||
1483 | struct pfkey_dump_data *data = ptr; | ||
1484 | struct sk_buff *out_skb; | ||
1485 | struct sadb_msg *out_hdr; | ||
1486 | |||
1487 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | ||
1488 | if (IS_ERR(out_skb)) | ||
1489 | return PTR_ERR(out_skb); | ||
1490 | |||
1491 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
1492 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | ||
1493 | out_hdr->sadb_msg_type = SADB_DUMP; | ||
1494 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | ||
1495 | out_hdr->sadb_msg_errno = 0; | ||
1496 | out_hdr->sadb_msg_reserved = 0; | ||
1497 | out_hdr->sadb_msg_seq = count; | ||
1498 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | ||
1499 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | ||
1500 | return 0; | ||
1501 | } | ||
1502 | |||
1503 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1504 | { | ||
1505 | u8 proto; | ||
1506 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | ||
1507 | |||
1508 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | ||
1509 | if (proto == 0) | ||
1510 | return -EINVAL; | ||
1511 | |||
1512 | return xfrm_state_walk(proto, dump_sa, &data); | ||
1513 | } | ||
1514 | |||
1515 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1516 | { | ||
1517 | struct pfkey_sock *pfk = pfkey_sk(sk); | ||
1518 | int satype = hdr->sadb_msg_satype; | ||
1519 | |||
1520 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | ||
1521 | /* XXX we mangle packet... */ | ||
1522 | hdr->sadb_msg_errno = 0; | ||
1523 | if (satype != 0 && satype != 1) | ||
1524 | return -EINVAL; | ||
1525 | pfk->promisc = satype; | ||
1526 | } | ||
1527 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); | ||
1528 | return 0; | ||
1529 | } | ||
1530 | |||
1531 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | ||
1532 | { | ||
1533 | int i; | ||
1534 | u32 reqid = *(u32*)ptr; | ||
1535 | |||
1536 | for (i=0; i<xp->xfrm_nr; i++) { | ||
1537 | if (xp->xfrm_vec[i].reqid == reqid) | ||
1538 | return -EEXIST; | ||
1539 | } | ||
1540 | return 0; | ||
1541 | } | ||
1542 | |||
1543 | static u32 gen_reqid(void) | ||
1544 | { | ||
1545 | u32 start; | ||
1546 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; | ||
1547 | |||
1548 | start = reqid; | ||
1549 | do { | ||
1550 | ++reqid; | ||
1551 | if (reqid == 0) | ||
1552 | reqid = IPSEC_MANUAL_REQID_MAX+1; | ||
1553 | if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST) | ||
1554 | return reqid; | ||
1555 | } while (reqid != start); | ||
1556 | return 0; | ||
1557 | } | ||
1558 | |||
1559 | static int | ||
1560 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | ||
1561 | { | ||
1562 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; | ||
1563 | struct sockaddr_in *sin; | ||
1564 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
1565 | struct sockaddr_in6 *sin6; | ||
1566 | #endif | ||
1567 | |||
1568 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | ||
1569 | return -ELOOP; | ||
1570 | |||
1571 | if (rq->sadb_x_ipsecrequest_mode == 0) | ||
1572 | return -EINVAL; | ||
1573 | |||
1574 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | ||
1575 | t->mode = rq->sadb_x_ipsecrequest_mode-1; | ||
1576 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) | ||
1577 | t->optional = 1; | ||
1578 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | ||
1579 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | ||
1580 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | ||
1581 | t->reqid = 0; | ||
1582 | if (!t->reqid && !(t->reqid = gen_reqid())) | ||
1583 | return -ENOBUFS; | ||
1584 | } | ||
1585 | |||
1586 | /* addresses present only in tunnel mode */ | ||
1587 | if (t->mode) { | ||
1588 | switch (xp->family) { | ||
1589 | case AF_INET: | ||
1590 | sin = (void*)(rq+1); | ||
1591 | if (sin->sin_family != AF_INET) | ||
1592 | return -EINVAL; | ||
1593 | t->saddr.a4 = sin->sin_addr.s_addr; | ||
1594 | sin++; | ||
1595 | if (sin->sin_family != AF_INET) | ||
1596 | return -EINVAL; | ||
1597 | t->id.daddr.a4 = sin->sin_addr.s_addr; | ||
1598 | break; | ||
1599 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
1600 | case AF_INET6: | ||
1601 | sin6 = (void *)(rq+1); | ||
1602 | if (sin6->sin6_family != AF_INET6) | ||
1603 | return -EINVAL; | ||
1604 | memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); | ||
1605 | sin6++; | ||
1606 | if (sin6->sin6_family != AF_INET6) | ||
1607 | return -EINVAL; | ||
1608 | memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); | ||
1609 | break; | ||
1610 | #endif | ||
1611 | default: | ||
1612 | return -EINVAL; | ||
1613 | } | ||
1614 | } | ||
1615 | /* No way to set this via kame pfkey */ | ||
1616 | t->aalgos = t->ealgos = t->calgos = ~0; | ||
1617 | xp->xfrm_nr++; | ||
1618 | return 0; | ||
1619 | } | ||
1620 | |||
1621 | static int | ||
1622 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | ||
1623 | { | ||
1624 | int err; | ||
1625 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | ||
1626 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | ||
1627 | |||
1628 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | ||
1629 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | ||
1630 | return err; | ||
1631 | len -= rq->sadb_x_ipsecrequest_len; | ||
1632 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | ||
1633 | } | ||
1634 | return 0; | ||
1635 | } | ||
1636 | |||
1637 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) | ||
1638 | { | ||
1639 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | ||
1640 | int socklen = (xp->family == AF_INET ? | ||
1641 | sizeof(struct sockaddr_in) : | ||
1642 | sizeof(struct sockaddr_in6)); | ||
1643 | |||
1644 | return sizeof(struct sadb_msg) + | ||
1645 | (sizeof(struct sadb_lifetime) * 3) + | ||
1646 | (sizeof(struct sadb_address) * 2) + | ||
1647 | (sockaddr_size * 2) + | ||
1648 | sizeof(struct sadb_x_policy) + | ||
1649 | (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) + | ||
1650 | (socklen * 2))); | ||
1651 | } | ||
1652 | |||
1653 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) | ||
1654 | { | ||
1655 | struct sk_buff *skb; | ||
1656 | int size; | ||
1657 | |||
1658 | size = pfkey_xfrm_policy2msg_size(xp); | ||
1659 | |||
1660 | skb = alloc_skb(size + 16, GFP_ATOMIC); | ||
1661 | if (skb == NULL) | ||
1662 | return ERR_PTR(-ENOBUFS); | ||
1663 | |||
1664 | return skb; | ||
1665 | } | ||
1666 | |||
1667 | static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) | ||
1668 | { | ||
1669 | struct sadb_msg *hdr; | ||
1670 | struct sadb_address *addr; | ||
1671 | struct sadb_lifetime *lifetime; | ||
1672 | struct sadb_x_policy *pol; | ||
1673 | struct sockaddr_in *sin; | ||
1674 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
1675 | struct sockaddr_in6 *sin6; | ||
1676 | #endif | ||
1677 | int i; | ||
1678 | int size; | ||
1679 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | ||
1680 | int socklen = (xp->family == AF_INET ? | ||
1681 | sizeof(struct sockaddr_in) : | ||
1682 | sizeof(struct sockaddr_in6)); | ||
1683 | |||
1684 | size = pfkey_xfrm_policy2msg_size(xp); | ||
1685 | |||
1686 | /* call should fill header later */ | ||
1687 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | ||
1688 | memset(hdr, 0, size); /* XXX do we need this ? */ | ||
1689 | |||
1690 | /* src address */ | ||
1691 | addr = (struct sadb_address*) skb_put(skb, | ||
1692 | sizeof(struct sadb_address)+sockaddr_size); | ||
1693 | addr->sadb_address_len = | ||
1694 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
1695 | sizeof(uint64_t); | ||
1696 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | ||
1697 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | ||
1698 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | ||
1699 | addr->sadb_address_reserved = 0; | ||
1700 | /* src address */ | ||
1701 | if (xp->family == AF_INET) { | ||
1702 | sin = (struct sockaddr_in *) (addr + 1); | ||
1703 | sin->sin_family = AF_INET; | ||
1704 | sin->sin_addr.s_addr = xp->selector.saddr.a4; | ||
1705 | sin->sin_port = xp->selector.sport; | ||
1706 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
1707 | } | ||
1708 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
1709 | else if (xp->family == AF_INET6) { | ||
1710 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
1711 | sin6->sin6_family = AF_INET6; | ||
1712 | sin6->sin6_port = xp->selector.sport; | ||
1713 | sin6->sin6_flowinfo = 0; | ||
1714 | memcpy(&sin6->sin6_addr, xp->selector.saddr.a6, | ||
1715 | sizeof(struct in6_addr)); | ||
1716 | sin6->sin6_scope_id = 0; | ||
1717 | } | ||
1718 | #endif | ||
1719 | else | ||
1720 | BUG(); | ||
1721 | |||
1722 | /* dst address */ | ||
1723 | addr = (struct sadb_address*) skb_put(skb, | ||
1724 | sizeof(struct sadb_address)+sockaddr_size); | ||
1725 | addr->sadb_address_len = | ||
1726 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
1727 | sizeof(uint64_t); | ||
1728 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | ||
1729 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | ||
1730 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; | ||
1731 | addr->sadb_address_reserved = 0; | ||
1732 | if (xp->family == AF_INET) { | ||
1733 | sin = (struct sockaddr_in *) (addr + 1); | ||
1734 | sin->sin_family = AF_INET; | ||
1735 | sin->sin_addr.s_addr = xp->selector.daddr.a4; | ||
1736 | sin->sin_port = xp->selector.dport; | ||
1737 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
1738 | } | ||
1739 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
1740 | else if (xp->family == AF_INET6) { | ||
1741 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
1742 | sin6->sin6_family = AF_INET6; | ||
1743 | sin6->sin6_port = xp->selector.dport; | ||
1744 | sin6->sin6_flowinfo = 0; | ||
1745 | memcpy(&sin6->sin6_addr, xp->selector.daddr.a6, | ||
1746 | sizeof(struct in6_addr)); | ||
1747 | sin6->sin6_scope_id = 0; | ||
1748 | } | ||
1749 | #endif | ||
1750 | else | ||
1751 | BUG(); | ||
1752 | |||
1753 | /* hard time */ | ||
1754 | lifetime = (struct sadb_lifetime *) skb_put(skb, | ||
1755 | sizeof(struct sadb_lifetime)); | ||
1756 | lifetime->sadb_lifetime_len = | ||
1757 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | ||
1758 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | ||
1759 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | ||
1760 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | ||
1761 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | ||
1762 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | ||
1763 | /* soft time */ | ||
1764 | lifetime = (struct sadb_lifetime *) skb_put(skb, | ||
1765 | sizeof(struct sadb_lifetime)); | ||
1766 | lifetime->sadb_lifetime_len = | ||
1767 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | ||
1768 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | ||
1769 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | ||
1770 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | ||
1771 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | ||
1772 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | ||
1773 | /* current time */ | ||
1774 | lifetime = (struct sadb_lifetime *) skb_put(skb, | ||
1775 | sizeof(struct sadb_lifetime)); | ||
1776 | lifetime->sadb_lifetime_len = | ||
1777 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | ||
1778 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | ||
1779 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | ||
1780 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | ||
1781 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | ||
1782 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | ||
1783 | |||
1784 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | ||
1785 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | ||
1786 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | ||
1787 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | ||
1788 | if (xp->action == XFRM_POLICY_ALLOW) { | ||
1789 | if (xp->xfrm_nr) | ||
1790 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | ||
1791 | else | ||
1792 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | ||
1793 | } | ||
1794 | pol->sadb_x_policy_dir = dir+1; | ||
1795 | pol->sadb_x_policy_id = xp->index; | ||
1796 | pol->sadb_x_policy_priority = xp->priority; | ||
1797 | |||
1798 | for (i=0; i<xp->xfrm_nr; i++) { | ||
1799 | struct sadb_x_ipsecrequest *rq; | ||
1800 | struct xfrm_tmpl *t = xp->xfrm_vec + i; | ||
1801 | int req_size; | ||
1802 | |||
1803 | req_size = sizeof(struct sadb_x_ipsecrequest); | ||
1804 | if (t->mode) | ||
1805 | req_size += 2*socklen; | ||
1806 | else | ||
1807 | size -= 2*socklen; | ||
1808 | rq = (void*)skb_put(skb, req_size); | ||
1809 | pol->sadb_x_policy_len += req_size/8; | ||
1810 | memset(rq, 0, sizeof(*rq)); | ||
1811 | rq->sadb_x_ipsecrequest_len = req_size; | ||
1812 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | ||
1813 | rq->sadb_x_ipsecrequest_mode = t->mode+1; | ||
1814 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; | ||
1815 | if (t->reqid) | ||
1816 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | ||
1817 | if (t->optional) | ||
1818 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | ||
1819 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | ||
1820 | if (t->mode) { | ||
1821 | switch (xp->family) { | ||
1822 | case AF_INET: | ||
1823 | sin = (void*)(rq+1); | ||
1824 | sin->sin_family = AF_INET; | ||
1825 | sin->sin_addr.s_addr = t->saddr.a4; | ||
1826 | sin->sin_port = 0; | ||
1827 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
1828 | sin++; | ||
1829 | sin->sin_family = AF_INET; | ||
1830 | sin->sin_addr.s_addr = t->id.daddr.a4; | ||
1831 | sin->sin_port = 0; | ||
1832 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
1833 | break; | ||
1834 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
1835 | case AF_INET6: | ||
1836 | sin6 = (void*)(rq+1); | ||
1837 | sin6->sin6_family = AF_INET6; | ||
1838 | sin6->sin6_port = 0; | ||
1839 | sin6->sin6_flowinfo = 0; | ||
1840 | memcpy(&sin6->sin6_addr, t->saddr.a6, | ||
1841 | sizeof(struct in6_addr)); | ||
1842 | sin6->sin6_scope_id = 0; | ||
1843 | |||
1844 | sin6++; | ||
1845 | sin6->sin6_family = AF_INET6; | ||
1846 | sin6->sin6_port = 0; | ||
1847 | sin6->sin6_flowinfo = 0; | ||
1848 | memcpy(&sin6->sin6_addr, t->id.daddr.a6, | ||
1849 | sizeof(struct in6_addr)); | ||
1850 | sin6->sin6_scope_id = 0; | ||
1851 | break; | ||
1852 | #endif | ||
1853 | default: | ||
1854 | break; | ||
1855 | } | ||
1856 | } | ||
1857 | } | ||
1858 | hdr->sadb_msg_len = size / sizeof(uint64_t); | ||
1859 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | ||
1860 | } | ||
1861 | |||
1862 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1863 | { | ||
1864 | int err; | ||
1865 | struct sadb_lifetime *lifetime; | ||
1866 | struct sadb_address *sa; | ||
1867 | struct sadb_x_policy *pol; | ||
1868 | struct xfrm_policy *xp; | ||
1869 | struct sk_buff *out_skb; | ||
1870 | struct sadb_msg *out_hdr; | ||
1871 | |||
1872 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1873 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | ||
1874 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | ||
1875 | return -EINVAL; | ||
1876 | |||
1877 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | ||
1878 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | ||
1879 | return -EINVAL; | ||
1880 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | ||
1881 | return -EINVAL; | ||
1882 | |||
1883 | xp = xfrm_policy_alloc(GFP_KERNEL); | ||
1884 | if (xp == NULL) | ||
1885 | return -ENOBUFS; | ||
1886 | |||
1887 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | ||
1888 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | ||
1889 | xp->priority = pol->sadb_x_policy_priority; | ||
1890 | |||
1891 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1892 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); | ||
1893 | if (!xp->family) { | ||
1894 | err = -EINVAL; | ||
1895 | goto out; | ||
1896 | } | ||
1897 | xp->selector.family = xp->family; | ||
1898 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | ||
1899 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | ||
1900 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | ||
1901 | if (xp->selector.sport) | ||
1902 | xp->selector.sport_mask = ~0; | ||
1903 | |||
1904 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], | ||
1905 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); | ||
1906 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | ||
1907 | |||
1908 | /* Amusing, we set this twice. KAME apps appear to set same value | ||
1909 | * in both addresses. | ||
1910 | */ | ||
1911 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | ||
1912 | |||
1913 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | ||
1914 | if (xp->selector.dport) | ||
1915 | xp->selector.dport_mask = ~0; | ||
1916 | |||
1917 | xp->lft.soft_byte_limit = XFRM_INF; | ||
1918 | xp->lft.hard_byte_limit = XFRM_INF; | ||
1919 | xp->lft.soft_packet_limit = XFRM_INF; | ||
1920 | xp->lft.hard_packet_limit = XFRM_INF; | ||
1921 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | ||
1922 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | ||
1923 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | ||
1924 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | ||
1925 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | ||
1926 | } | ||
1927 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | ||
1928 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | ||
1929 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | ||
1930 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | ||
1931 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | ||
1932 | } | ||
1933 | xp->xfrm_nr = 0; | ||
1934 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | ||
1935 | (err = parse_ipsecrequests(xp, pol)) < 0) | ||
1936 | goto out; | ||
1937 | |||
1938 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | ||
1939 | if (IS_ERR(out_skb)) { | ||
1940 | err = PTR_ERR(out_skb); | ||
1941 | goto out; | ||
1942 | } | ||
1943 | |||
1944 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, | ||
1945 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | ||
1946 | if (err) { | ||
1947 | kfree_skb(out_skb); | ||
1948 | goto out; | ||
1949 | } | ||
1950 | |||
1951 | pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1); | ||
1952 | |||
1953 | xfrm_pol_put(xp); | ||
1954 | |||
1955 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
1956 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | ||
1957 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; | ||
1958 | out_hdr->sadb_msg_satype = 0; | ||
1959 | out_hdr->sadb_msg_errno = 0; | ||
1960 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | ||
1961 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | ||
1962 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); | ||
1963 | return 0; | ||
1964 | |||
1965 | out: | ||
1966 | kfree(xp); | ||
1967 | return err; | ||
1968 | } | ||
1969 | |||
1970 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
1971 | { | ||
1972 | int err; | ||
1973 | struct sadb_address *sa; | ||
1974 | struct sadb_x_policy *pol; | ||
1975 | struct xfrm_policy *xp; | ||
1976 | struct sk_buff *out_skb; | ||
1977 | struct sadb_msg *out_hdr; | ||
1978 | struct xfrm_selector sel; | ||
1979 | |||
1980 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1981 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | ||
1982 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | ||
1983 | return -EINVAL; | ||
1984 | |||
1985 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | ||
1986 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | ||
1987 | return -EINVAL; | ||
1988 | |||
1989 | memset(&sel, 0, sizeof(sel)); | ||
1990 | |||
1991 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | ||
1992 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | ||
1993 | sel.prefixlen_s = sa->sadb_address_prefixlen; | ||
1994 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | ||
1995 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | ||
1996 | if (sel.sport) | ||
1997 | sel.sport_mask = ~0; | ||
1998 | |||
1999 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], | ||
2000 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | ||
2001 | sel.prefixlen_d = sa->sadb_address_prefixlen; | ||
2002 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | ||
2003 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | ||
2004 | if (sel.dport) | ||
2005 | sel.dport_mask = ~0; | ||
2006 | |||
2007 | xp = xfrm_policy_bysel(pol->sadb_x_policy_dir-1, &sel, 1); | ||
2008 | if (xp == NULL) | ||
2009 | return -ENOENT; | ||
2010 | |||
2011 | err = 0; | ||
2012 | |||
2013 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | ||
2014 | if (IS_ERR(out_skb)) { | ||
2015 | err = PTR_ERR(out_skb); | ||
2016 | goto out; | ||
2017 | } | ||
2018 | pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1); | ||
2019 | |||
2020 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
2021 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | ||
2022 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE; | ||
2023 | out_hdr->sadb_msg_satype = 0; | ||
2024 | out_hdr->sadb_msg_errno = 0; | ||
2025 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | ||
2026 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | ||
2027 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); | ||
2028 | err = 0; | ||
2029 | |||
2030 | out: | ||
2031 | xfrm_pol_put(xp); | ||
2032 | return err; | ||
2033 | } | ||
2034 | |||
2035 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
2036 | { | ||
2037 | int err; | ||
2038 | struct sadb_x_policy *pol; | ||
2039 | struct xfrm_policy *xp; | ||
2040 | struct sk_buff *out_skb; | ||
2041 | struct sadb_msg *out_hdr; | ||
2042 | |||
2043 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | ||
2044 | return -EINVAL; | ||
2045 | |||
2046 | xp = xfrm_policy_byid(0, pol->sadb_x_policy_id, | ||
2047 | hdr->sadb_msg_type == SADB_X_SPDDELETE2); | ||
2048 | if (xp == NULL) | ||
2049 | return -ENOENT; | ||
2050 | |||
2051 | err = 0; | ||
2052 | |||
2053 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | ||
2054 | if (IS_ERR(out_skb)) { | ||
2055 | err = PTR_ERR(out_skb); | ||
2056 | goto out; | ||
2057 | } | ||
2058 | pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1); | ||
2059 | |||
2060 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
2061 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | ||
2062 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; | ||
2063 | out_hdr->sadb_msg_satype = 0; | ||
2064 | out_hdr->sadb_msg_errno = 0; | ||
2065 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | ||
2066 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | ||
2067 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk); | ||
2068 | err = 0; | ||
2069 | |||
2070 | out: | ||
2071 | xfrm_pol_put(xp); | ||
2072 | return err; | ||
2073 | } | ||
2074 | |||
2075 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | ||
2076 | { | ||
2077 | struct pfkey_dump_data *data = ptr; | ||
2078 | struct sk_buff *out_skb; | ||
2079 | struct sadb_msg *out_hdr; | ||
2080 | |||
2081 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | ||
2082 | if (IS_ERR(out_skb)) | ||
2083 | return PTR_ERR(out_skb); | ||
2084 | |||
2085 | pfkey_xfrm_policy2msg(out_skb, xp, dir); | ||
2086 | |||
2087 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
2088 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | ||
2089 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; | ||
2090 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | ||
2091 | out_hdr->sadb_msg_errno = 0; | ||
2092 | out_hdr->sadb_msg_seq = count; | ||
2093 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | ||
2094 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | ||
2095 | return 0; | ||
2096 | } | ||
2097 | |||
2098 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
2099 | { | ||
2100 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | ||
2101 | |||
2102 | return xfrm_policy_walk(dump_sp, &data); | ||
2103 | } | ||
2104 | |||
2105 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | ||
2106 | { | ||
2107 | struct sk_buff *skb_out; | ||
2108 | struct sadb_msg *hdr_out; | ||
2109 | |||
2110 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | ||
2111 | if (!skb_out) | ||
2112 | return -ENOBUFS; | ||
2113 | |||
2114 | xfrm_policy_flush(); | ||
2115 | |||
2116 | hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); | ||
2117 | pfkey_hdr_dup(hdr_out, hdr); | ||
2118 | hdr_out->sadb_msg_errno = (uint8_t) 0; | ||
2119 | hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | ||
2120 | pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL); | ||
2121 | |||
2122 | return 0; | ||
2123 | } | ||
2124 | |||
2125 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | ||
2126 | struct sadb_msg *hdr, void **ext_hdrs); | ||
2127 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { | ||
2128 | [SADB_RESERVED] = pfkey_reserved, | ||
2129 | [SADB_GETSPI] = pfkey_getspi, | ||
2130 | [SADB_UPDATE] = pfkey_add, | ||
2131 | [SADB_ADD] = pfkey_add, | ||
2132 | [SADB_DELETE] = pfkey_delete, | ||
2133 | [SADB_GET] = pfkey_get, | ||
2134 | [SADB_ACQUIRE] = pfkey_acquire, | ||
2135 | [SADB_REGISTER] = pfkey_register, | ||
2136 | [SADB_EXPIRE] = NULL, | ||
2137 | [SADB_FLUSH] = pfkey_flush, | ||
2138 | [SADB_DUMP] = pfkey_dump, | ||
2139 | [SADB_X_PROMISC] = pfkey_promisc, | ||
2140 | [SADB_X_PCHANGE] = NULL, | ||
2141 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | ||
2142 | [SADB_X_SPDADD] = pfkey_spdadd, | ||
2143 | [SADB_X_SPDDELETE] = pfkey_spddelete, | ||
2144 | [SADB_X_SPDGET] = pfkey_spdget, | ||
2145 | [SADB_X_SPDACQUIRE] = NULL, | ||
2146 | [SADB_X_SPDDUMP] = pfkey_spddump, | ||
2147 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | ||
2148 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | ||
2149 | [SADB_X_SPDDELETE2] = pfkey_spdget, | ||
2150 | }; | ||
2151 | |||
2152 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) | ||
2153 | { | ||
2154 | void *ext_hdrs[SADB_EXT_MAX]; | ||
2155 | int err; | ||
2156 | |||
2157 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | ||
2158 | BROADCAST_PROMISC_ONLY, NULL); | ||
2159 | |||
2160 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | ||
2161 | err = parse_exthdrs(skb, hdr, ext_hdrs); | ||
2162 | if (!err) { | ||
2163 | err = -EOPNOTSUPP; | ||
2164 | if (pfkey_funcs[hdr->sadb_msg_type]) | ||
2165 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | ||
2166 | } | ||
2167 | return err; | ||
2168 | } | ||
2169 | |||
2170 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | ||
2171 | { | ||
2172 | struct sadb_msg *hdr = NULL; | ||
2173 | |||
2174 | if (skb->len < sizeof(*hdr)) { | ||
2175 | *errp = -EMSGSIZE; | ||
2176 | } else { | ||
2177 | hdr = (struct sadb_msg *) skb->data; | ||
2178 | if (hdr->sadb_msg_version != PF_KEY_V2 || | ||
2179 | hdr->sadb_msg_reserved != 0 || | ||
2180 | (hdr->sadb_msg_type <= SADB_RESERVED || | ||
2181 | hdr->sadb_msg_type > SADB_MAX)) { | ||
2182 | hdr = NULL; | ||
2183 | *errp = -EINVAL; | ||
2184 | } else if (hdr->sadb_msg_len != (skb->len / | ||
2185 | sizeof(uint64_t)) || | ||
2186 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | ||
2187 | sizeof(uint64_t))) { | ||
2188 | hdr = NULL; | ||
2189 | *errp = -EMSGSIZE; | ||
2190 | } else { | ||
2191 | *errp = 0; | ||
2192 | } | ||
2193 | } | ||
2194 | return hdr; | ||
2195 | } | ||
2196 | |||
2197 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | ||
2198 | { | ||
2199 | return t->aalgos & (1 << d->desc.sadb_alg_id); | ||
2200 | } | ||
2201 | |||
2202 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | ||
2203 | { | ||
2204 | return t->ealgos & (1 << d->desc.sadb_alg_id); | ||
2205 | } | ||
2206 | |||
2207 | static int count_ah_combs(struct xfrm_tmpl *t) | ||
2208 | { | ||
2209 | int i, sz = 0; | ||
2210 | |||
2211 | for (i = 0; ; i++) { | ||
2212 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | ||
2213 | if (!aalg) | ||
2214 | break; | ||
2215 | if (aalg_tmpl_set(t, aalg) && aalg->available) | ||
2216 | sz += sizeof(struct sadb_comb); | ||
2217 | } | ||
2218 | return sz + sizeof(struct sadb_prop); | ||
2219 | } | ||
2220 | |||
2221 | static int count_esp_combs(struct xfrm_tmpl *t) | ||
2222 | { | ||
2223 | int i, k, sz = 0; | ||
2224 | |||
2225 | for (i = 0; ; i++) { | ||
2226 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | ||
2227 | if (!ealg) | ||
2228 | break; | ||
2229 | |||
2230 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) | ||
2231 | continue; | ||
2232 | |||
2233 | for (k = 1; ; k++) { | ||
2234 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | ||
2235 | if (!aalg) | ||
2236 | break; | ||
2237 | |||
2238 | if (aalg_tmpl_set(t, aalg) && aalg->available) | ||
2239 | sz += sizeof(struct sadb_comb); | ||
2240 | } | ||
2241 | } | ||
2242 | return sz + sizeof(struct sadb_prop); | ||
2243 | } | ||
2244 | |||
2245 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | ||
2246 | { | ||
2247 | struct sadb_prop *p; | ||
2248 | int i; | ||
2249 | |||
2250 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | ||
2251 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | ||
2252 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | ||
2253 | p->sadb_prop_replay = 32; | ||
2254 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | ||
2255 | |||
2256 | for (i = 0; ; i++) { | ||
2257 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | ||
2258 | if (!aalg) | ||
2259 | break; | ||
2260 | |||
2261 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | ||
2262 | struct sadb_comb *c; | ||
2263 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | ||
2264 | memset(c, 0, sizeof(*c)); | ||
2265 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | ||
2266 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | ||
2267 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | ||
2268 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | ||
2269 | c->sadb_comb_hard_addtime = 24*60*60; | ||
2270 | c->sadb_comb_soft_addtime = 20*60*60; | ||
2271 | c->sadb_comb_hard_usetime = 8*60*60; | ||
2272 | c->sadb_comb_soft_usetime = 7*60*60; | ||
2273 | } | ||
2274 | } | ||
2275 | } | ||
2276 | |||
2277 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | ||
2278 | { | ||
2279 | struct sadb_prop *p; | ||
2280 | int i, k; | ||
2281 | |||
2282 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | ||
2283 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | ||
2284 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | ||
2285 | p->sadb_prop_replay = 32; | ||
2286 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | ||
2287 | |||
2288 | for (i=0; ; i++) { | ||
2289 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | ||
2290 | if (!ealg) | ||
2291 | break; | ||
2292 | |||
2293 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) | ||
2294 | continue; | ||
2295 | |||
2296 | for (k = 1; ; k++) { | ||
2297 | struct sadb_comb *c; | ||
2298 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | ||
2299 | if (!aalg) | ||
2300 | break; | ||
2301 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | ||
2302 | continue; | ||
2303 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | ||
2304 | memset(c, 0, sizeof(*c)); | ||
2305 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | ||
2306 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | ||
2307 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | ||
2308 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | ||
2309 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | ||
2310 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | ||
2311 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | ||
2312 | c->sadb_comb_hard_addtime = 24*60*60; | ||
2313 | c->sadb_comb_soft_addtime = 20*60*60; | ||
2314 | c->sadb_comb_hard_usetime = 8*60*60; | ||
2315 | c->sadb_comb_soft_usetime = 7*60*60; | ||
2316 | } | ||
2317 | } | ||
2318 | } | ||
2319 | |||
2320 | static int pfkey_send_notify(struct xfrm_state *x, int hard) | ||
2321 | { | ||
2322 | struct sk_buff *out_skb; | ||
2323 | struct sadb_msg *out_hdr; | ||
2324 | int hsc = (hard ? 2 : 1); | ||
2325 | |||
2326 | out_skb = pfkey_xfrm_state2msg(x, 0, hsc); | ||
2327 | if (IS_ERR(out_skb)) | ||
2328 | return PTR_ERR(out_skb); | ||
2329 | |||
2330 | out_hdr = (struct sadb_msg *) out_skb->data; | ||
2331 | out_hdr->sadb_msg_version = PF_KEY_V2; | ||
2332 | out_hdr->sadb_msg_type = SADB_EXPIRE; | ||
2333 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | ||
2334 | out_hdr->sadb_msg_errno = 0; | ||
2335 | out_hdr->sadb_msg_reserved = 0; | ||
2336 | out_hdr->sadb_msg_seq = 0; | ||
2337 | out_hdr->sadb_msg_pid = 0; | ||
2338 | |||
2339 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | ||
2340 | return 0; | ||
2341 | } | ||
2342 | |||
2343 | static u32 get_acqseq(void) | ||
2344 | { | ||
2345 | u32 res; | ||
2346 | static u32 acqseq; | ||
2347 | static DEFINE_SPINLOCK(acqseq_lock); | ||
2348 | |||
2349 | spin_lock_bh(&acqseq_lock); | ||
2350 | res = (++acqseq ? : ++acqseq); | ||
2351 | spin_unlock_bh(&acqseq_lock); | ||
2352 | return res; | ||
2353 | } | ||
2354 | |||
2355 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | ||
2356 | { | ||
2357 | struct sk_buff *skb; | ||
2358 | struct sadb_msg *hdr; | ||
2359 | struct sadb_address *addr; | ||
2360 | struct sadb_x_policy *pol; | ||
2361 | struct sockaddr_in *sin; | ||
2362 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
2363 | struct sockaddr_in6 *sin6; | ||
2364 | #endif | ||
2365 | int sockaddr_size; | ||
2366 | int size; | ||
2367 | |||
2368 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | ||
2369 | if (!sockaddr_size) | ||
2370 | return -EINVAL; | ||
2371 | |||
2372 | size = sizeof(struct sadb_msg) + | ||
2373 | (sizeof(struct sadb_address) * 2) + | ||
2374 | (sockaddr_size * 2) + | ||
2375 | sizeof(struct sadb_x_policy); | ||
2376 | |||
2377 | if (x->id.proto == IPPROTO_AH) | ||
2378 | size += count_ah_combs(t); | ||
2379 | else if (x->id.proto == IPPROTO_ESP) | ||
2380 | size += count_esp_combs(t); | ||
2381 | |||
2382 | skb = alloc_skb(size + 16, GFP_ATOMIC); | ||
2383 | if (skb == NULL) | ||
2384 | return -ENOMEM; | ||
2385 | |||
2386 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | ||
2387 | hdr->sadb_msg_version = PF_KEY_V2; | ||
2388 | hdr->sadb_msg_type = SADB_ACQUIRE; | ||
2389 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | ||
2390 | hdr->sadb_msg_len = size / sizeof(uint64_t); | ||
2391 | hdr->sadb_msg_errno = 0; | ||
2392 | hdr->sadb_msg_reserved = 0; | ||
2393 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | ||
2394 | hdr->sadb_msg_pid = 0; | ||
2395 | |||
2396 | /* src address */ | ||
2397 | addr = (struct sadb_address*) skb_put(skb, | ||
2398 | sizeof(struct sadb_address)+sockaddr_size); | ||
2399 | addr->sadb_address_len = | ||
2400 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
2401 | sizeof(uint64_t); | ||
2402 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | ||
2403 | addr->sadb_address_proto = 0; | ||
2404 | addr->sadb_address_reserved = 0; | ||
2405 | if (x->props.family == AF_INET) { | ||
2406 | addr->sadb_address_prefixlen = 32; | ||
2407 | |||
2408 | sin = (struct sockaddr_in *) (addr + 1); | ||
2409 | sin->sin_family = AF_INET; | ||
2410 | sin->sin_addr.s_addr = x->props.saddr.a4; | ||
2411 | sin->sin_port = 0; | ||
2412 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
2413 | } | ||
2414 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
2415 | else if (x->props.family == AF_INET6) { | ||
2416 | addr->sadb_address_prefixlen = 128; | ||
2417 | |||
2418 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
2419 | sin6->sin6_family = AF_INET6; | ||
2420 | sin6->sin6_port = 0; | ||
2421 | sin6->sin6_flowinfo = 0; | ||
2422 | memcpy(&sin6->sin6_addr, | ||
2423 | x->props.saddr.a6, sizeof(struct in6_addr)); | ||
2424 | sin6->sin6_scope_id = 0; | ||
2425 | } | ||
2426 | #endif | ||
2427 | else | ||
2428 | BUG(); | ||
2429 | |||
2430 | /* dst address */ | ||
2431 | addr = (struct sadb_address*) skb_put(skb, | ||
2432 | sizeof(struct sadb_address)+sockaddr_size); | ||
2433 | addr->sadb_address_len = | ||
2434 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
2435 | sizeof(uint64_t); | ||
2436 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | ||
2437 | addr->sadb_address_proto = 0; | ||
2438 | addr->sadb_address_reserved = 0; | ||
2439 | if (x->props.family == AF_INET) { | ||
2440 | addr->sadb_address_prefixlen = 32; | ||
2441 | |||
2442 | sin = (struct sockaddr_in *) (addr + 1); | ||
2443 | sin->sin_family = AF_INET; | ||
2444 | sin->sin_addr.s_addr = x->id.daddr.a4; | ||
2445 | sin->sin_port = 0; | ||
2446 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
2447 | } | ||
2448 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
2449 | else if (x->props.family == AF_INET6) { | ||
2450 | addr->sadb_address_prefixlen = 128; | ||
2451 | |||
2452 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
2453 | sin6->sin6_family = AF_INET6; | ||
2454 | sin6->sin6_port = 0; | ||
2455 | sin6->sin6_flowinfo = 0; | ||
2456 | memcpy(&sin6->sin6_addr, | ||
2457 | x->id.daddr.a6, sizeof(struct in6_addr)); | ||
2458 | sin6->sin6_scope_id = 0; | ||
2459 | } | ||
2460 | #endif | ||
2461 | else | ||
2462 | BUG(); | ||
2463 | |||
2464 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | ||
2465 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | ||
2466 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | ||
2467 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | ||
2468 | pol->sadb_x_policy_dir = dir+1; | ||
2469 | pol->sadb_x_policy_id = xp->index; | ||
2470 | |||
2471 | /* Set sadb_comb's. */ | ||
2472 | if (x->id.proto == IPPROTO_AH) | ||
2473 | dump_ah_combs(skb, t); | ||
2474 | else if (x->id.proto == IPPROTO_ESP) | ||
2475 | dump_esp_combs(skb, t); | ||
2476 | |||
2477 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | ||
2478 | } | ||
2479 | |||
2480 | static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt, | ||
2481 | u8 *data, int len, int *dir) | ||
2482 | { | ||
2483 | struct xfrm_policy *xp; | ||
2484 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | ||
2485 | |||
2486 | switch (family) { | ||
2487 | case AF_INET: | ||
2488 | if (opt != IP_IPSEC_POLICY) { | ||
2489 | *dir = -EOPNOTSUPP; | ||
2490 | return NULL; | ||
2491 | } | ||
2492 | break; | ||
2493 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
2494 | case AF_INET6: | ||
2495 | if (opt != IPV6_IPSEC_POLICY) { | ||
2496 | *dir = -EOPNOTSUPP; | ||
2497 | return NULL; | ||
2498 | } | ||
2499 | break; | ||
2500 | #endif | ||
2501 | default: | ||
2502 | *dir = -EINVAL; | ||
2503 | return NULL; | ||
2504 | } | ||
2505 | |||
2506 | *dir = -EINVAL; | ||
2507 | |||
2508 | if (len < sizeof(struct sadb_x_policy) || | ||
2509 | pol->sadb_x_policy_len*8 > len || | ||
2510 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | ||
2511 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | ||
2512 | return NULL; | ||
2513 | |||
2514 | xp = xfrm_policy_alloc(GFP_ATOMIC); | ||
2515 | if (xp == NULL) { | ||
2516 | *dir = -ENOBUFS; | ||
2517 | return NULL; | ||
2518 | } | ||
2519 | |||
2520 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | ||
2521 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | ||
2522 | |||
2523 | xp->lft.soft_byte_limit = XFRM_INF; | ||
2524 | xp->lft.hard_byte_limit = XFRM_INF; | ||
2525 | xp->lft.soft_packet_limit = XFRM_INF; | ||
2526 | xp->lft.hard_packet_limit = XFRM_INF; | ||
2527 | xp->family = family; | ||
2528 | |||
2529 | xp->xfrm_nr = 0; | ||
2530 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | ||
2531 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | ||
2532 | goto out; | ||
2533 | |||
2534 | *dir = pol->sadb_x_policy_dir-1; | ||
2535 | return xp; | ||
2536 | |||
2537 | out: | ||
2538 | kfree(xp); | ||
2539 | return NULL; | ||
2540 | } | ||
2541 | |||
2542 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport) | ||
2543 | { | ||
2544 | struct sk_buff *skb; | ||
2545 | struct sadb_msg *hdr; | ||
2546 | struct sadb_sa *sa; | ||
2547 | struct sadb_address *addr; | ||
2548 | struct sadb_x_nat_t_port *n_port; | ||
2549 | struct sockaddr_in *sin; | ||
2550 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
2551 | struct sockaddr_in6 *sin6; | ||
2552 | #endif | ||
2553 | int sockaddr_size; | ||
2554 | int size; | ||
2555 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | ||
2556 | struct xfrm_encap_tmpl *natt = NULL; | ||
2557 | |||
2558 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | ||
2559 | if (!sockaddr_size) | ||
2560 | return -EINVAL; | ||
2561 | |||
2562 | if (!satype) | ||
2563 | return -EINVAL; | ||
2564 | |||
2565 | if (!x->encap) | ||
2566 | return -EINVAL; | ||
2567 | |||
2568 | natt = x->encap; | ||
2569 | |||
2570 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | ||
2571 | * | ||
2572 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | ||
2573 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | ||
2574 | */ | ||
2575 | |||
2576 | size = sizeof(struct sadb_msg) + | ||
2577 | sizeof(struct sadb_sa) + | ||
2578 | (sizeof(struct sadb_address) * 2) + | ||
2579 | (sockaddr_size * 2) + | ||
2580 | (sizeof(struct sadb_x_nat_t_port) * 2); | ||
2581 | |||
2582 | skb = alloc_skb(size + 16, GFP_ATOMIC); | ||
2583 | if (skb == NULL) | ||
2584 | return -ENOMEM; | ||
2585 | |||
2586 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | ||
2587 | hdr->sadb_msg_version = PF_KEY_V2; | ||
2588 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | ||
2589 | hdr->sadb_msg_satype = satype; | ||
2590 | hdr->sadb_msg_len = size / sizeof(uint64_t); | ||
2591 | hdr->sadb_msg_errno = 0; | ||
2592 | hdr->sadb_msg_reserved = 0; | ||
2593 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | ||
2594 | hdr->sadb_msg_pid = 0; | ||
2595 | |||
2596 | /* SA */ | ||
2597 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | ||
2598 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | ||
2599 | sa->sadb_sa_exttype = SADB_EXT_SA; | ||
2600 | sa->sadb_sa_spi = x->id.spi; | ||
2601 | sa->sadb_sa_replay = 0; | ||
2602 | sa->sadb_sa_state = 0; | ||
2603 | sa->sadb_sa_auth = 0; | ||
2604 | sa->sadb_sa_encrypt = 0; | ||
2605 | sa->sadb_sa_flags = 0; | ||
2606 | |||
2607 | /* ADDRESS_SRC (old addr) */ | ||
2608 | addr = (struct sadb_address*) | ||
2609 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | ||
2610 | addr->sadb_address_len = | ||
2611 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
2612 | sizeof(uint64_t); | ||
2613 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | ||
2614 | addr->sadb_address_proto = 0; | ||
2615 | addr->sadb_address_reserved = 0; | ||
2616 | if (x->props.family == AF_INET) { | ||
2617 | addr->sadb_address_prefixlen = 32; | ||
2618 | |||
2619 | sin = (struct sockaddr_in *) (addr + 1); | ||
2620 | sin->sin_family = AF_INET; | ||
2621 | sin->sin_addr.s_addr = x->props.saddr.a4; | ||
2622 | sin->sin_port = 0; | ||
2623 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
2624 | } | ||
2625 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
2626 | else if (x->props.family == AF_INET6) { | ||
2627 | addr->sadb_address_prefixlen = 128; | ||
2628 | |||
2629 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
2630 | sin6->sin6_family = AF_INET6; | ||
2631 | sin6->sin6_port = 0; | ||
2632 | sin6->sin6_flowinfo = 0; | ||
2633 | memcpy(&sin6->sin6_addr, | ||
2634 | x->props.saddr.a6, sizeof(struct in6_addr)); | ||
2635 | sin6->sin6_scope_id = 0; | ||
2636 | } | ||
2637 | #endif | ||
2638 | else | ||
2639 | BUG(); | ||
2640 | |||
2641 | /* NAT_T_SPORT (old port) */ | ||
2642 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | ||
2643 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | ||
2644 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | ||
2645 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | ||
2646 | n_port->sadb_x_nat_t_port_reserved = 0; | ||
2647 | |||
2648 | /* ADDRESS_DST (new addr) */ | ||
2649 | addr = (struct sadb_address*) | ||
2650 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | ||
2651 | addr->sadb_address_len = | ||
2652 | (sizeof(struct sadb_address)+sockaddr_size)/ | ||
2653 | sizeof(uint64_t); | ||
2654 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | ||
2655 | addr->sadb_address_proto = 0; | ||
2656 | addr->sadb_address_reserved = 0; | ||
2657 | if (x->props.family == AF_INET) { | ||
2658 | addr->sadb_address_prefixlen = 32; | ||
2659 | |||
2660 | sin = (struct sockaddr_in *) (addr + 1); | ||
2661 | sin->sin_family = AF_INET; | ||
2662 | sin->sin_addr.s_addr = ipaddr->a4; | ||
2663 | sin->sin_port = 0; | ||
2664 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | ||
2665 | } | ||
2666 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | ||
2667 | else if (x->props.family == AF_INET6) { | ||
2668 | addr->sadb_address_prefixlen = 128; | ||
2669 | |||
2670 | sin6 = (struct sockaddr_in6 *) (addr + 1); | ||
2671 | sin6->sin6_family = AF_INET6; | ||
2672 | sin6->sin6_port = 0; | ||
2673 | sin6->sin6_flowinfo = 0; | ||
2674 | memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr)); | ||
2675 | sin6->sin6_scope_id = 0; | ||
2676 | } | ||
2677 | #endif | ||
2678 | else | ||
2679 | BUG(); | ||
2680 | |||
2681 | /* NAT_T_DPORT (new port) */ | ||
2682 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | ||
2683 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | ||
2684 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | ||
2685 | n_port->sadb_x_nat_t_port_port = sport; | ||
2686 | n_port->sadb_x_nat_t_port_reserved = 0; | ||
2687 | |||
2688 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | ||
2689 | } | ||
2690 | |||
2691 | static int pfkey_sendmsg(struct kiocb *kiocb, | ||
2692 | struct socket *sock, struct msghdr *msg, size_t len) | ||
2693 | { | ||
2694 | struct sock *sk = sock->sk; | ||
2695 | struct sk_buff *skb = NULL; | ||
2696 | struct sadb_msg *hdr = NULL; | ||
2697 | int err; | ||
2698 | |||
2699 | err = -EOPNOTSUPP; | ||
2700 | if (msg->msg_flags & MSG_OOB) | ||
2701 | goto out; | ||
2702 | |||
2703 | err = -EMSGSIZE; | ||
2704 | if ((unsigned)len > sk->sk_sndbuf - 32) | ||
2705 | goto out; | ||
2706 | |||
2707 | err = -ENOBUFS; | ||
2708 | skb = alloc_skb(len, GFP_KERNEL); | ||
2709 | if (skb == NULL) | ||
2710 | goto out; | ||
2711 | |||
2712 | err = -EFAULT; | ||
2713 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | ||
2714 | goto out; | ||
2715 | |||
2716 | hdr = pfkey_get_base_msg(skb, &err); | ||
2717 | if (!hdr) | ||
2718 | goto out; | ||
2719 | |||
2720 | down(&xfrm_cfg_sem); | ||
2721 | err = pfkey_process(sk, skb, hdr); | ||
2722 | up(&xfrm_cfg_sem); | ||
2723 | |||
2724 | out: | ||
2725 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | ||
2726 | err = 0; | ||
2727 | if (skb) | ||
2728 | kfree_skb(skb); | ||
2729 | |||
2730 | return err ? : len; | ||
2731 | } | ||
2732 | |||
2733 | static int pfkey_recvmsg(struct kiocb *kiocb, | ||
2734 | struct socket *sock, struct msghdr *msg, size_t len, | ||
2735 | int flags) | ||
2736 | { | ||
2737 | struct sock *sk = sock->sk; | ||
2738 | struct sk_buff *skb; | ||
2739 | int copied, err; | ||
2740 | |||
2741 | err = -EINVAL; | ||
2742 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | ||
2743 | goto out; | ||
2744 | |||
2745 | msg->msg_namelen = 0; | ||
2746 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | ||
2747 | if (skb == NULL) | ||
2748 | goto out; | ||
2749 | |||
2750 | copied = skb->len; | ||
2751 | if (copied > len) { | ||
2752 | msg->msg_flags |= MSG_TRUNC; | ||
2753 | copied = len; | ||
2754 | } | ||
2755 | |||
2756 | skb->h.raw = skb->data; | ||
2757 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | ||
2758 | if (err) | ||
2759 | goto out_free; | ||
2760 | |||
2761 | sock_recv_timestamp(msg, sk, skb); | ||
2762 | |||
2763 | err = (flags & MSG_TRUNC) ? skb->len : copied; | ||
2764 | |||
2765 | out_free: | ||
2766 | skb_free_datagram(sk, skb); | ||
2767 | out: | ||
2768 | return err; | ||
2769 | } | ||
2770 | |||
2771 | static struct proto_ops pfkey_ops = { | ||
2772 | .family = PF_KEY, | ||
2773 | .owner = THIS_MODULE, | ||
2774 | /* Operations that make no sense on pfkey sockets. */ | ||
2775 | .bind = sock_no_bind, | ||
2776 | .connect = sock_no_connect, | ||
2777 | .socketpair = sock_no_socketpair, | ||
2778 | .accept = sock_no_accept, | ||
2779 | .getname = sock_no_getname, | ||
2780 | .ioctl = sock_no_ioctl, | ||
2781 | .listen = sock_no_listen, | ||
2782 | .shutdown = sock_no_shutdown, | ||
2783 | .setsockopt = sock_no_setsockopt, | ||
2784 | .getsockopt = sock_no_getsockopt, | ||
2785 | .mmap = sock_no_mmap, | ||
2786 | .sendpage = sock_no_sendpage, | ||
2787 | |||
2788 | /* Now the operations that really occur. */ | ||
2789 | .release = pfkey_release, | ||
2790 | .poll = datagram_poll, | ||
2791 | .sendmsg = pfkey_sendmsg, | ||
2792 | .recvmsg = pfkey_recvmsg, | ||
2793 | }; | ||
2794 | |||
2795 | static struct net_proto_family pfkey_family_ops = { | ||
2796 | .family = PF_KEY, | ||
2797 | .create = pfkey_create, | ||
2798 | .owner = THIS_MODULE, | ||
2799 | }; | ||
2800 | |||
2801 | #ifdef CONFIG_PROC_FS | ||
2802 | static int pfkey_read_proc(char *buffer, char **start, off_t offset, | ||
2803 | int length, int *eof, void *data) | ||
2804 | { | ||
2805 | off_t pos = 0; | ||
2806 | off_t begin = 0; | ||
2807 | int len = 0; | ||
2808 | struct sock *s; | ||
2809 | struct hlist_node *node; | ||
2810 | |||
2811 | len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n"); | ||
2812 | |||
2813 | read_lock(&pfkey_table_lock); | ||
2814 | |||
2815 | sk_for_each(s, node, &pfkey_table) { | ||
2816 | len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu", | ||
2817 | s, | ||
2818 | atomic_read(&s->sk_refcnt), | ||
2819 | atomic_read(&s->sk_rmem_alloc), | ||
2820 | atomic_read(&s->sk_wmem_alloc), | ||
2821 | sock_i_uid(s), | ||
2822 | sock_i_ino(s) | ||
2823 | ); | ||
2824 | |||
2825 | buffer[len++] = '\n'; | ||
2826 | |||
2827 | pos = begin + len; | ||
2828 | if (pos < offset) { | ||
2829 | len = 0; | ||
2830 | begin = pos; | ||
2831 | } | ||
2832 | if(pos > offset + length) | ||
2833 | goto done; | ||
2834 | } | ||
2835 | *eof = 1; | ||
2836 | |||
2837 | done: | ||
2838 | read_unlock(&pfkey_table_lock); | ||
2839 | |||
2840 | *start = buffer + (offset - begin); | ||
2841 | len -= (offset - begin); | ||
2842 | |||
2843 | if (len > length) | ||
2844 | len = length; | ||
2845 | if (len < 0) | ||
2846 | len = 0; | ||
2847 | |||
2848 | return len; | ||
2849 | } | ||
2850 | #endif | ||
2851 | |||
2852 | static struct xfrm_mgr pfkeyv2_mgr = | ||
2853 | { | ||
2854 | .id = "pfkeyv2", | ||
2855 | .notify = pfkey_send_notify, | ||
2856 | .acquire = pfkey_send_acquire, | ||
2857 | .compile_policy = pfkey_compile_policy, | ||
2858 | .new_mapping = pfkey_send_new_mapping, | ||
2859 | }; | ||
2860 | |||
2861 | static void __exit ipsec_pfkey_exit(void) | ||
2862 | { | ||
2863 | xfrm_unregister_km(&pfkeyv2_mgr); | ||
2864 | remove_proc_entry("net/pfkey", NULL); | ||
2865 | sock_unregister(PF_KEY); | ||
2866 | proto_unregister(&key_proto); | ||
2867 | } | ||
2868 | |||
2869 | static int __init ipsec_pfkey_init(void) | ||
2870 | { | ||
2871 | int err = proto_register(&key_proto, 0); | ||
2872 | |||
2873 | if (err != 0) | ||
2874 | goto out; | ||
2875 | |||
2876 | err = sock_register(&pfkey_family_ops); | ||
2877 | if (err != 0) | ||
2878 | goto out_unregister_key_proto; | ||
2879 | #ifdef CONFIG_PROC_FS | ||
2880 | err = -ENOMEM; | ||
2881 | if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL) | ||
2882 | goto out_sock_unregister; | ||
2883 | #endif | ||
2884 | err = xfrm_register_km(&pfkeyv2_mgr); | ||
2885 | if (err != 0) | ||
2886 | goto out_remove_proc_entry; | ||
2887 | out: | ||
2888 | return err; | ||
2889 | out_remove_proc_entry: | ||
2890 | #ifdef CONFIG_PROC_FS | ||
2891 | remove_proc_entry("net/pfkey", NULL); | ||
2892 | out_sock_unregister: | ||
2893 | #endif | ||
2894 | sock_unregister(PF_KEY); | ||
2895 | out_unregister_key_proto: | ||
2896 | proto_unregister(&key_proto); | ||
2897 | goto out; | ||
2898 | } | ||
2899 | |||
2900 | module_init(ipsec_pfkey_init); | ||
2901 | module_exit(ipsec_pfkey_exit); | ||
2902 | MODULE_LICENSE("GPL"); | ||
2903 | MODULE_ALIAS_NETPROTO(PF_KEY); | ||