Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Maxim Giryaev <gem@asplinux.ru> | |
10 | * David S. Miller <davem@redhat.com> | |
11 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
12 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
13 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> | |
14 | * Derek Atkins <derek@ihtfp.com> | |
15 | */ | |
16 | ||
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); |