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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 | ||
90ddc4f0 | 116 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
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, | |
dd0fc66f | 188 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
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 | |
dd0fc66f | 220 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
1da177e4 LT |
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; | |
09a62660 | 300 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
301 | |
302 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
303 | pfkey_hdr_dup(hdr, orig); | |
304 | hdr->sadb_msg_errno = (uint8_t) err; | |
305 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
306 | sizeof(uint64_t)); | |
307 | ||
308 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | static u8 sadb_ext_min_len[] = { | |
314 | [SADB_EXT_RESERVED] = (u8) 0, | |
315 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
316 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
317 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
318 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
319 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
320 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
321 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
322 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
323 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
324 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
325 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
326 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
327 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
328 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
329 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
330 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
331 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
332 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
333 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
334 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
335 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
336 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
337 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 338 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
1da177e4 LT |
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 | ||
df71837d TJ |
386 | static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) |
387 | { | |
388 | int len = 0; | |
389 | ||
390 | len += sizeof(struct sadb_x_sec_ctx); | |
391 | len += sec_ctx->sadb_x_ctx_len; | |
392 | len += sizeof(uint64_t) - 1; | |
393 | len /= sizeof(uint64_t); | |
394 | ||
395 | return len; | |
396 | } | |
397 | ||
398 | static inline int verify_sec_ctx_len(void *p) | |
399 | { | |
400 | struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; | |
401 | int len; | |
402 | ||
403 | if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE) | |
404 | return -EINVAL; | |
405 | ||
406 | len = pfkey_sec_ctx_len(sec_ctx); | |
407 | ||
408 | if (sec_ctx->sadb_x_sec_len != len) | |
409 | return -EINVAL; | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
414 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) | |
415 | { | |
416 | struct xfrm_user_sec_ctx *uctx = NULL; | |
417 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
418 | ||
419 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); | |
420 | ||
421 | if (!uctx) | |
422 | return NULL; | |
423 | ||
424 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
425 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
426 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
427 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
428 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
429 | memcpy(uctx + 1, sec_ctx + 1, | |
430 | uctx->ctx_len); | |
431 | ||
432 | return uctx; | |
433 | } | |
434 | ||
1da177e4 LT |
435 | static int present_and_same_family(struct sadb_address *src, |
436 | struct sadb_address *dst) | |
437 | { | |
438 | struct sockaddr *s_addr, *d_addr; | |
439 | ||
440 | if (!src || !dst) | |
441 | return 0; | |
442 | ||
443 | s_addr = (struct sockaddr *)(src + 1); | |
444 | d_addr = (struct sockaddr *)(dst + 1); | |
445 | if (s_addr->sa_family != d_addr->sa_family) | |
446 | return 0; | |
447 | if (s_addr->sa_family != AF_INET | |
448 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
449 | && s_addr->sa_family != AF_INET6 | |
450 | #endif | |
451 | ) | |
452 | return 0; | |
453 | ||
454 | return 1; | |
455 | } | |
456 | ||
457 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
458 | { | |
459 | char *p = (char *) hdr; | |
460 | int len = skb->len; | |
461 | ||
462 | len -= sizeof(*hdr); | |
463 | p += sizeof(*hdr); | |
464 | while (len > 0) { | |
465 | struct sadb_ext *ehdr = (struct sadb_ext *) p; | |
466 | uint16_t ext_type; | |
467 | int ext_len; | |
468 | ||
469 | ext_len = ehdr->sadb_ext_len; | |
470 | ext_len *= sizeof(uint64_t); | |
471 | ext_type = ehdr->sadb_ext_type; | |
472 | if (ext_len < sizeof(uint64_t) || | |
473 | ext_len > len || | |
474 | ext_type == SADB_EXT_RESERVED) | |
475 | return -EINVAL; | |
476 | ||
477 | if (ext_type <= SADB_EXT_MAX) { | |
478 | int min = (int) sadb_ext_min_len[ext_type]; | |
479 | if (ext_len < min) | |
480 | return -EINVAL; | |
481 | if (ext_hdrs[ext_type-1] != NULL) | |
482 | return -EINVAL; | |
483 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
484 | ext_type == SADB_EXT_ADDRESS_DST || | |
485 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
486 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
487 | if (verify_address_len(p)) | |
488 | return -EINVAL; | |
489 | } | |
df71837d TJ |
490 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
491 | if (verify_sec_ctx_len(p)) | |
492 | return -EINVAL; | |
493 | } | |
1da177e4 LT |
494 | ext_hdrs[ext_type-1] = p; |
495 | } | |
496 | p += ext_len; | |
497 | len -= ext_len; | |
498 | } | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | static uint16_t | |
504 | pfkey_satype2proto(uint8_t satype) | |
505 | { | |
506 | switch (satype) { | |
507 | case SADB_SATYPE_UNSPEC: | |
508 | return IPSEC_PROTO_ANY; | |
509 | case SADB_SATYPE_AH: | |
510 | return IPPROTO_AH; | |
511 | case SADB_SATYPE_ESP: | |
512 | return IPPROTO_ESP; | |
513 | case SADB_X_SATYPE_IPCOMP: | |
514 | return IPPROTO_COMP; | |
515 | break; | |
516 | default: | |
517 | return 0; | |
518 | } | |
519 | /* NOTREACHED */ | |
520 | } | |
521 | ||
522 | static uint8_t | |
523 | pfkey_proto2satype(uint16_t proto) | |
524 | { | |
525 | switch (proto) { | |
526 | case IPPROTO_AH: | |
527 | return SADB_SATYPE_AH; | |
528 | case IPPROTO_ESP: | |
529 | return SADB_SATYPE_ESP; | |
530 | case IPPROTO_COMP: | |
531 | return SADB_X_SATYPE_IPCOMP; | |
532 | break; | |
533 | default: | |
534 | return 0; | |
535 | } | |
536 | /* NOTREACHED */ | |
537 | } | |
538 | ||
539 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
540 | * say specifically 'just raw sockets' as we encode them as 255. | |
541 | */ | |
542 | ||
543 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
544 | { | |
545 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); | |
546 | } | |
547 | ||
548 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
549 | { | |
550 | return (proto ? proto : IPSEC_PROTO_ANY); | |
551 | } | |
552 | ||
553 | static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, | |
554 | xfrm_address_t *xaddr) | |
555 | { | |
556 | switch (((struct sockaddr*)(addr + 1))->sa_family) { | |
557 | case AF_INET: | |
558 | xaddr->a4 = | |
559 | ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr; | |
560 | return AF_INET; | |
561 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
562 | case AF_INET6: | |
563 | memcpy(xaddr->a6, | |
564 | &((struct sockaddr_in6 *)(addr + 1))->sin6_addr, | |
565 | sizeof(struct in6_addr)); | |
566 | return AF_INET6; | |
567 | #endif | |
568 | default: | |
569 | return 0; | |
570 | } | |
571 | /* NOTREACHED */ | |
572 | } | |
573 | ||
574 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) | |
575 | { | |
576 | struct sadb_sa *sa; | |
577 | struct sadb_address *addr; | |
578 | uint16_t proto; | |
579 | unsigned short family; | |
580 | xfrm_address_t *xaddr; | |
581 | ||
582 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
583 | if (sa == NULL) | |
584 | return NULL; | |
585 | ||
586 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
587 | if (proto == 0) | |
588 | return NULL; | |
589 | ||
590 | /* sadb_address_len should be checked by caller */ | |
591 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
592 | if (addr == NULL) | |
593 | return NULL; | |
594 | ||
595 | family = ((struct sockaddr *)(addr + 1))->sa_family; | |
596 | switch (family) { | |
597 | case AF_INET: | |
598 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; | |
599 | break; | |
600 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
601 | case AF_INET6: | |
602 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; | |
603 | break; | |
604 | #endif | |
605 | default: | |
606 | xaddr = NULL; | |
607 | } | |
608 | ||
609 | if (!xaddr) | |
610 | return NULL; | |
611 | ||
612 | return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); | |
613 | } | |
614 | ||
615 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
616 | static int | |
617 | pfkey_sockaddr_size(sa_family_t family) | |
618 | { | |
619 | switch (family) { | |
620 | case AF_INET: | |
621 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in)); | |
622 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
623 | case AF_INET6: | |
624 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in6)); | |
625 | #endif | |
626 | default: | |
627 | return 0; | |
628 | } | |
629 | /* NOTREACHED */ | |
630 | } | |
631 | ||
632 | static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc) | |
633 | { | |
634 | struct sk_buff *skb; | |
635 | struct sadb_msg *hdr; | |
636 | struct sadb_sa *sa; | |
637 | struct sadb_lifetime *lifetime; | |
638 | struct sadb_address *addr; | |
639 | struct sadb_key *key; | |
640 | struct sadb_x_sa2 *sa2; | |
641 | struct sockaddr_in *sin; | |
df71837d TJ |
642 | struct sadb_x_sec_ctx *sec_ctx; |
643 | struct xfrm_sec_ctx *xfrm_ctx; | |
644 | int ctx_size = 0; | |
1da177e4 LT |
645 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
646 | struct sockaddr_in6 *sin6; | |
647 | #endif | |
648 | int size; | |
649 | int auth_key_size = 0; | |
650 | int encrypt_key_size = 0; | |
651 | int sockaddr_size; | |
652 | struct xfrm_encap_tmpl *natt = NULL; | |
653 | ||
654 | /* address family check */ | |
655 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
656 | if (!sockaddr_size) | |
657 | return ERR_PTR(-EINVAL); | |
658 | ||
659 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
660 | key(AE), (identity(SD),) (sensitivity)> */ | |
661 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + | |
662 | sizeof(struct sadb_lifetime) + | |
663 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
664 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
665 | sizeof(struct sadb_address)*2 + | |
666 | sockaddr_size*2 + | |
667 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
668 | |
669 | if ((xfrm_ctx = x->security)) { | |
670 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
671 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
672 | } | |
673 | ||
1da177e4 LT |
674 | /* identity & sensitivity */ |
675 | ||
676 | if ((x->props.family == AF_INET && | |
677 | x->sel.saddr.a4 != x->props.saddr.a4) | |
678 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
679 | || (x->props.family == AF_INET6 && | |
680 | memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr))) | |
681 | #endif | |
682 | ) | |
683 | size += sizeof(struct sadb_address) + sockaddr_size; | |
684 | ||
685 | if (add_keys) { | |
686 | if (x->aalg && x->aalg->alg_key_len) { | |
687 | auth_key_size = | |
688 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
689 | size += sizeof(struct sadb_key) + auth_key_size; | |
690 | } | |
691 | if (x->ealg && x->ealg->alg_key_len) { | |
692 | encrypt_key_size = | |
693 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
694 | size += sizeof(struct sadb_key) + encrypt_key_size; | |
695 | } | |
696 | } | |
697 | if (x->encap) | |
698 | natt = x->encap; | |
699 | ||
700 | if (natt && natt->encap_type) { | |
701 | size += sizeof(struct sadb_x_nat_t_type); | |
702 | size += sizeof(struct sadb_x_nat_t_port); | |
703 | size += sizeof(struct sadb_x_nat_t_port); | |
704 | } | |
705 | ||
706 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
707 | if (skb == NULL) | |
708 | return ERR_PTR(-ENOBUFS); | |
709 | ||
710 | /* call should fill header later */ | |
711 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
712 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
713 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
714 | ||
715 | /* sa */ | |
716 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
717 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
718 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
719 | sa->sadb_sa_spi = x->id.spi; | |
720 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
721 | switch (x->km.state) { |
722 | case XFRM_STATE_VALID: | |
723 | sa->sadb_sa_state = x->km.dying ? | |
724 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
725 | break; | |
726 | case XFRM_STATE_ACQ: | |
1da177e4 | 727 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
728 | break; |
729 | default: | |
1da177e4 | 730 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
731 | break; |
732 | } | |
1da177e4 LT |
733 | sa->sadb_sa_auth = 0; |
734 | if (x->aalg) { | |
735 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
736 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | |
737 | } | |
738 | sa->sadb_sa_encrypt = 0; | |
739 | BUG_ON(x->ealg && x->calg); | |
740 | if (x->ealg) { | |
741 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
742 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
743 | } | |
744 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
745 | if (x->calg) { | |
746 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
747 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
748 | } | |
749 | ||
750 | sa->sadb_sa_flags = 0; | |
751 | if (x->props.flags & XFRM_STATE_NOECN) | |
752 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
753 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
754 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
755 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
756 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
757 | |
758 | /* hard time */ | |
759 | if (hsc & 2) { | |
760 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
761 | sizeof(struct sadb_lifetime)); | |
762 | lifetime->sadb_lifetime_len = | |
763 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
764 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
765 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
766 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
767 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
768 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
769 | } | |
770 | /* soft time */ | |
771 | if (hsc & 1) { | |
772 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
773 | sizeof(struct sadb_lifetime)); | |
774 | lifetime->sadb_lifetime_len = | |
775 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
776 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
777 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
778 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
779 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
780 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
781 | } | |
782 | /* current time */ | |
783 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
784 | sizeof(struct sadb_lifetime)); | |
785 | lifetime->sadb_lifetime_len = | |
786 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
787 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
788 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
789 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
790 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
791 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
792 | /* src address */ | |
793 | addr = (struct sadb_address*) skb_put(skb, | |
794 | sizeof(struct sadb_address)+sockaddr_size); | |
795 | addr->sadb_address_len = | |
796 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
797 | sizeof(uint64_t); | |
798 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
799 | /* "if the ports are non-zero, then the sadb_address_proto field, | |
800 | normally zero, MUST be filled in with the transport | |
801 | protocol's number." - RFC2367 */ | |
802 | addr->sadb_address_proto = 0; | |
803 | addr->sadb_address_reserved = 0; | |
804 | if (x->props.family == AF_INET) { | |
805 | addr->sadb_address_prefixlen = 32; | |
806 | ||
807 | sin = (struct sockaddr_in *) (addr + 1); | |
808 | sin->sin_family = AF_INET; | |
809 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
810 | sin->sin_port = 0; | |
811 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
812 | } | |
813 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
814 | else if (x->props.family == AF_INET6) { | |
815 | addr->sadb_address_prefixlen = 128; | |
816 | ||
817 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
818 | sin6->sin6_family = AF_INET6; | |
819 | sin6->sin6_port = 0; | |
820 | sin6->sin6_flowinfo = 0; | |
821 | memcpy(&sin6->sin6_addr, x->props.saddr.a6, | |
822 | sizeof(struct in6_addr)); | |
823 | sin6->sin6_scope_id = 0; | |
824 | } | |
825 | #endif | |
826 | else | |
827 | BUG(); | |
828 | ||
829 | /* dst address */ | |
830 | addr = (struct sadb_address*) skb_put(skb, | |
831 | sizeof(struct sadb_address)+sockaddr_size); | |
832 | addr->sadb_address_len = | |
833 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
834 | sizeof(uint64_t); | |
835 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
836 | addr->sadb_address_proto = 0; | |
837 | addr->sadb_address_prefixlen = 32; /* XXX */ | |
838 | addr->sadb_address_reserved = 0; | |
839 | if (x->props.family == AF_INET) { | |
840 | sin = (struct sockaddr_in *) (addr + 1); | |
841 | sin->sin_family = AF_INET; | |
842 | sin->sin_addr.s_addr = x->id.daddr.a4; | |
843 | sin->sin_port = 0; | |
844 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
845 | ||
846 | if (x->sel.saddr.a4 != x->props.saddr.a4) { | |
847 | addr = (struct sadb_address*) skb_put(skb, | |
848 | sizeof(struct sadb_address)+sockaddr_size); | |
849 | addr->sadb_address_len = | |
850 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
851 | sizeof(uint64_t); | |
852 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
853 | addr->sadb_address_proto = | |
854 | pfkey_proto_from_xfrm(x->sel.proto); | |
855 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
856 | addr->sadb_address_reserved = 0; | |
857 | ||
858 | sin = (struct sockaddr_in *) (addr + 1); | |
859 | sin->sin_family = AF_INET; | |
860 | sin->sin_addr.s_addr = x->sel.saddr.a4; | |
861 | sin->sin_port = x->sel.sport; | |
862 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
863 | } | |
864 | } | |
865 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
866 | else if (x->props.family == AF_INET6) { | |
867 | addr->sadb_address_prefixlen = 128; | |
868 | ||
869 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
870 | sin6->sin6_family = AF_INET6; | |
871 | sin6->sin6_port = 0; | |
872 | sin6->sin6_flowinfo = 0; | |
873 | memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr)); | |
874 | sin6->sin6_scope_id = 0; | |
875 | ||
876 | if (memcmp (x->sel.saddr.a6, x->props.saddr.a6, | |
877 | sizeof(struct in6_addr))) { | |
878 | addr = (struct sadb_address *) skb_put(skb, | |
879 | sizeof(struct sadb_address)+sockaddr_size); | |
880 | addr->sadb_address_len = | |
881 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
882 | sizeof(uint64_t); | |
883 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
884 | addr->sadb_address_proto = | |
885 | pfkey_proto_from_xfrm(x->sel.proto); | |
886 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
887 | addr->sadb_address_reserved = 0; | |
888 | ||
889 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
890 | sin6->sin6_family = AF_INET6; | |
891 | sin6->sin6_port = x->sel.sport; | |
892 | sin6->sin6_flowinfo = 0; | |
893 | memcpy(&sin6->sin6_addr, x->sel.saddr.a6, | |
894 | sizeof(struct in6_addr)); | |
895 | sin6->sin6_scope_id = 0; | |
896 | } | |
897 | } | |
898 | #endif | |
899 | else | |
900 | BUG(); | |
901 | ||
902 | /* auth key */ | |
903 | if (add_keys && auth_key_size) { | |
904 | key = (struct sadb_key *) skb_put(skb, | |
905 | sizeof(struct sadb_key)+auth_key_size); | |
906 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
907 | sizeof(uint64_t); | |
908 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
909 | key->sadb_key_bits = x->aalg->alg_key_len; | |
910 | key->sadb_key_reserved = 0; | |
911 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
912 | } | |
913 | /* encrypt key */ | |
914 | if (add_keys && encrypt_key_size) { | |
915 | key = (struct sadb_key *) skb_put(skb, | |
916 | sizeof(struct sadb_key)+encrypt_key_size); | |
917 | key->sadb_key_len = (sizeof(struct sadb_key) + | |
918 | encrypt_key_size) / sizeof(uint64_t); | |
919 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
920 | key->sadb_key_bits = x->ealg->alg_key_len; | |
921 | key->sadb_key_reserved = 0; | |
922 | memcpy(key + 1, x->ealg->alg_key, | |
923 | (x->ealg->alg_key_len+7)/8); | |
924 | } | |
925 | ||
926 | /* sa */ | |
927 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
928 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
929 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
930 | sa2->sadb_x_sa2_mode = x->props.mode + 1; | |
931 | sa2->sadb_x_sa2_reserved1 = 0; | |
932 | sa2->sadb_x_sa2_reserved2 = 0; | |
933 | sa2->sadb_x_sa2_sequence = 0; | |
934 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
935 | ||
936 | if (natt && natt->encap_type) { | |
937 | struct sadb_x_nat_t_type *n_type; | |
938 | struct sadb_x_nat_t_port *n_port; | |
939 | ||
940 | /* type */ | |
941 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
942 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
943 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
944 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
945 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
946 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
947 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
948 | ||
949 | /* source port */ | |
950 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
951 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
952 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
953 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
954 | n_port->sadb_x_nat_t_port_reserved = 0; | |
955 | ||
956 | /* dest port */ | |
957 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
958 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
959 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
960 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
961 | n_port->sadb_x_nat_t_port_reserved = 0; | |
962 | } | |
963 | ||
df71837d TJ |
964 | /* security context */ |
965 | if (xfrm_ctx) { | |
966 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
967 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
968 | sec_ctx->sadb_x_sec_len = | |
969 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
970 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
971 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
972 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
973 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
974 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
975 | xfrm_ctx->ctx_len); | |
976 | } | |
977 | ||
1da177e4 LT |
978 | return skb; |
979 | } | |
980 | ||
981 | static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, | |
982 | void **ext_hdrs) | |
983 | { | |
984 | struct xfrm_state *x; | |
985 | struct sadb_lifetime *lifetime; | |
986 | struct sadb_sa *sa; | |
987 | struct sadb_key *key; | |
df71837d | 988 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
989 | uint16_t proto; |
990 | int err; | |
991 | ||
992 | ||
993 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
994 | if (!sa || | |
995 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
996 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
997 | return ERR_PTR(-EINVAL); | |
998 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
999 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1000 | return ERR_PTR(-EINVAL); | |
1001 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1002 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1003 | return ERR_PTR(-EINVAL); | |
1004 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1005 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1006 | return ERR_PTR(-EINVAL); | |
1007 | ||
1008 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1009 | if (proto == 0) | |
1010 | return ERR_PTR(-EINVAL); | |
1011 | ||
1012 | /* default error is no buffer space */ | |
1013 | err = -ENOBUFS; | |
1014 | ||
1015 | /* RFC2367: | |
1016 | ||
1017 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1018 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1019 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1020 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1021 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1022 | not true. | |
1023 | ||
1024 | However, KAME setkey always uses SADB_SASTATE_LARVAL. | |
1025 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. | |
1026 | */ | |
1027 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1028 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1029 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1030 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1031 | return ERR_PTR(-EINVAL); | |
1032 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | |
1033 | if (key != NULL && | |
1034 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1035 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1036 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1037 | return ERR_PTR(-EINVAL); | |
1038 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1039 | if (key != NULL && | |
1040 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1041 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1042 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1043 | return ERR_PTR(-EINVAL); | |
1044 | ||
1045 | x = xfrm_state_alloc(); | |
1046 | if (x == NULL) | |
1047 | return ERR_PTR(-ENOBUFS); | |
1048 | ||
1049 | x->id.proto = proto; | |
1050 | x->id.spi = sa->sadb_sa_spi; | |
1051 | x->props.replay_window = sa->sadb_sa_replay; | |
1052 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | |
1053 | x->props.flags |= XFRM_STATE_NOECN; | |
1054 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1055 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1056 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1057 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 LT |
1058 | |
1059 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; | |
1060 | if (lifetime != NULL) { | |
1061 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1062 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1063 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1064 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1065 | } | |
1066 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; | |
1067 | if (lifetime != NULL) { | |
1068 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1069 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1070 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1071 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1072 | } | |
df71837d TJ |
1073 | |
1074 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; | |
1075 | if (sec_ctx != NULL) { | |
1076 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
1077 | ||
1078 | if (!uctx) | |
1079 | goto out; | |
1080 | ||
1081 | err = security_xfrm_state_alloc(x, uctx); | |
1082 | kfree(uctx); | |
1083 | ||
1084 | if (err) | |
1085 | goto out; | |
1086 | } | |
1087 | ||
1da177e4 LT |
1088 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1089 | if (sa->sadb_sa_auth) { | |
1090 | int keysize = 0; | |
1091 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
1092 | if (!a) { | |
1093 | err = -ENOSYS; | |
1094 | goto out; | |
1095 | } | |
1096 | if (key) | |
1097 | keysize = (key->sadb_key_bits + 7) / 8; | |
1098 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1099 | if (!x->aalg) | |
1100 | goto out; | |
1101 | strcpy(x->aalg->alg_name, a->name); | |
1102 | x->aalg->alg_key_len = 0; | |
1103 | if (key) { | |
1104 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1105 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1106 | } | |
1107 | x->props.aalgo = sa->sadb_sa_auth; | |
1108 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1109 | } | |
1110 | if (sa->sadb_sa_encrypt) { | |
1111 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1112 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
1113 | if (!a) { | |
1114 | err = -ENOSYS; | |
1115 | goto out; | |
1116 | } | |
1117 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1118 | if (!x->calg) | |
1119 | goto out; | |
1120 | strcpy(x->calg->alg_name, a->name); | |
1121 | x->props.calgo = sa->sadb_sa_encrypt; | |
1122 | } else { | |
1123 | int keysize = 0; | |
1124 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
1125 | if (!a) { | |
1126 | err = -ENOSYS; | |
1127 | goto out; | |
1128 | } | |
1129 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1130 | if (key) | |
1131 | keysize = (key->sadb_key_bits + 7) / 8; | |
1132 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1133 | if (!x->ealg) | |
1134 | goto out; | |
1135 | strcpy(x->ealg->alg_name, a->name); | |
1136 | x->ealg->alg_key_len = 0; | |
1137 | if (key) { | |
1138 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1139 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1140 | } | |
1141 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1142 | } | |
1143 | } | |
1144 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1145 | ||
1146 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1147 | &x->props.saddr); | |
1148 | if (!x->props.family) { | |
1149 | err = -EAFNOSUPPORT; | |
1150 | goto out; | |
1151 | } | |
1152 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], | |
1153 | &x->id.daddr); | |
1154 | ||
1155 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
1156 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; | |
1157 | x->props.mode = sa2->sadb_x_sa2_mode; | |
1158 | if (x->props.mode) | |
1159 | x->props.mode--; | |
1160 | x->props.reqid = sa2->sadb_x_sa2_reqid; | |
1161 | } | |
1162 | ||
1163 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
1164 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; | |
1165 | ||
1166 | /* Nobody uses this, but we try. */ | |
1167 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1168 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1169 | } | |
1170 | ||
1171 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { | |
1172 | struct sadb_x_nat_t_type* n_type; | |
1173 | struct xfrm_encap_tmpl *natt; | |
1174 | ||
1175 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1176 | if (!x->encap) | |
1177 | goto out; | |
1178 | ||
1179 | natt = x->encap; | |
1180 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1181 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1182 | ||
1183 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
1184 | struct sadb_x_nat_t_port* n_port = | |
1185 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; | |
1186 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1187 | } | |
1188 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
1189 | struct sadb_x_nat_t_port* n_port = | |
1190 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; | |
1191 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1192 | } | |
1193 | } | |
1194 | ||
72cb6962 HX |
1195 | err = xfrm_init_state(x); |
1196 | if (err) | |
1da177e4 | 1197 | goto out; |
72cb6962 | 1198 | |
1da177e4 | 1199 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1200 | return x; |
1201 | ||
1202 | out: | |
1203 | x->km.state = XFRM_STATE_DEAD; | |
1204 | xfrm_state_put(x); | |
1205 | return ERR_PTR(err); | |
1206 | } | |
1207 | ||
1208 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1209 | { | |
1210 | return -EOPNOTSUPP; | |
1211 | } | |
1212 | ||
1213 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1214 | { | |
1215 | struct sk_buff *resp_skb; | |
1216 | struct sadb_x_sa2 *sa2; | |
1217 | struct sadb_address *saddr, *daddr; | |
1218 | struct sadb_msg *out_hdr; | |
1219 | struct xfrm_state *x = NULL; | |
1220 | u8 mode; | |
1221 | u32 reqid; | |
1222 | u8 proto; | |
1223 | unsigned short family; | |
1224 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1225 | ||
1226 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1227 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1228 | return -EINVAL; | |
1229 | ||
1230 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1231 | if (proto == 0) | |
1232 | return -EINVAL; | |
1233 | ||
1234 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
1235 | mode = sa2->sadb_x_sa2_mode - 1; | |
1236 | reqid = sa2->sadb_x_sa2_reqid; | |
1237 | } else { | |
1238 | mode = 0; | |
1239 | reqid = 0; | |
1240 | } | |
1241 | ||
1242 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1243 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1244 | ||
1245 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1246 | switch (family) { | |
1247 | case AF_INET: | |
1248 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1249 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1250 | break; | |
1251 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1252 | case AF_INET6: | |
1253 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1254 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1255 | break; | |
1256 | #endif | |
1257 | } | |
1258 | ||
1259 | if (hdr->sadb_msg_seq) { | |
1260 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1261 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { | |
1262 | xfrm_state_put(x); | |
1263 | x = NULL; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | if (!x) | |
1268 | x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); | |
1269 | ||
1270 | if (x == NULL) | |
1271 | return -ENOENT; | |
1272 | ||
1273 | resp_skb = ERR_PTR(-ENOENT); | |
1274 | ||
1275 | spin_lock_bh(&x->lock); | |
1276 | if (x->km.state != XFRM_STATE_DEAD) { | |
1277 | struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1]; | |
1278 | u32 min_spi, max_spi; | |
1279 | ||
1280 | if (range != NULL) { | |
1281 | min_spi = range->sadb_spirange_min; | |
1282 | max_spi = range->sadb_spirange_max; | |
1283 | } else { | |
1284 | min_spi = 0x100; | |
1285 | max_spi = 0x0fffffff; | |
1286 | } | |
1287 | xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi)); | |
1288 | if (x->id.spi) | |
1289 | resp_skb = pfkey_xfrm_state2msg(x, 0, 3); | |
1290 | } | |
1291 | spin_unlock_bh(&x->lock); | |
1292 | ||
1293 | if (IS_ERR(resp_skb)) { | |
1294 | xfrm_state_put(x); | |
1295 | return PTR_ERR(resp_skb); | |
1296 | } | |
1297 | ||
1298 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1299 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1300 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1301 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1302 | out_hdr->sadb_msg_errno = 0; | |
1303 | out_hdr->sadb_msg_reserved = 0; | |
1304 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1305 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1306 | ||
1307 | xfrm_state_put(x); | |
1308 | ||
1309 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1315 | { | |
1316 | struct xfrm_state *x; | |
1317 | ||
1318 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1319 | return -EOPNOTSUPP; | |
1320 | ||
1321 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1322 | return 0; | |
1323 | ||
1324 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1325 | if (x == NULL) | |
1326 | return 0; | |
1327 | ||
1328 | spin_lock_bh(&x->lock); | |
1329 | if (x->km.state == XFRM_STATE_ACQ) { | |
1330 | x->km.state = XFRM_STATE_ERROR; | |
1331 | wake_up(&km_waitq); | |
1332 | } | |
1333 | spin_unlock_bh(&x->lock); | |
1334 | xfrm_state_put(x); | |
1335 | return 0; | |
1336 | } | |
1337 | ||
26b15dad JHS |
1338 | static inline int event2poltype(int event) |
1339 | { | |
1340 | switch (event) { | |
f60f6b8f | 1341 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1342 | return SADB_X_SPDDELETE; |
f60f6b8f | 1343 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1344 | return SADB_X_SPDADD; |
f60f6b8f | 1345 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1346 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1347 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1348 | // return SADB_X_SPDEXPIRE; |
1349 | default: | |
1350 | printk("pfkey: Unknown policy event %d\n", event); | |
1351 | break; | |
1352 | } | |
1353 | ||
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static inline int event2keytype(int event) | |
1358 | { | |
1359 | switch (event) { | |
f60f6b8f | 1360 | case XFRM_MSG_DELSA: |
26b15dad | 1361 | return SADB_DELETE; |
f60f6b8f | 1362 | case XFRM_MSG_NEWSA: |
26b15dad | 1363 | return SADB_ADD; |
f60f6b8f | 1364 | case XFRM_MSG_UPDSA: |
26b15dad | 1365 | return SADB_UPDATE; |
f60f6b8f | 1366 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1367 | return SADB_EXPIRE; |
1368 | default: | |
1369 | printk("pfkey: Unknown SA event %d\n", event); | |
1370 | break; | |
1371 | } | |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | /* ADD/UPD/DEL */ | |
1377 | static int key_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1378 | { | |
1379 | struct sk_buff *skb; | |
1380 | struct sadb_msg *hdr; | |
1381 | int hsc = 3; | |
1382 | ||
f60f6b8f | 1383 | if (c->event == XFRM_MSG_DELSA) |
26b15dad JHS |
1384 | hsc = 0; |
1385 | ||
26b15dad JHS |
1386 | skb = pfkey_xfrm_state2msg(x, 0, hsc); |
1387 | ||
1388 | if (IS_ERR(skb)) | |
1389 | return PTR_ERR(skb); | |
1390 | ||
1391 | hdr = (struct sadb_msg *) skb->data; | |
1392 | hdr->sadb_msg_version = PF_KEY_V2; | |
1393 | hdr->sadb_msg_type = event2keytype(c->event); | |
1394 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1395 | hdr->sadb_msg_errno = 0; | |
1396 | hdr->sadb_msg_reserved = 0; | |
1397 | hdr->sadb_msg_seq = c->seq; | |
1398 | hdr->sadb_msg_pid = c->pid; | |
1399 | ||
1400 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1401 | ||
1402 | return 0; | |
1403 | } | |
1da177e4 LT |
1404 | |
1405 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1406 | { | |
1da177e4 LT |
1407 | struct xfrm_state *x; |
1408 | int err; | |
26b15dad | 1409 | struct km_event c; |
1da177e4 LT |
1410 | |
1411 | xfrm_probe_algs(); | |
1412 | ||
1413 | x = pfkey_msg2xfrm_state(hdr, ext_hdrs); | |
1414 | if (IS_ERR(x)) | |
1415 | return PTR_ERR(x); | |
1416 | ||
26b15dad | 1417 | xfrm_state_hold(x); |
1da177e4 LT |
1418 | if (hdr->sadb_msg_type == SADB_ADD) |
1419 | err = xfrm_state_add(x); | |
1420 | else | |
1421 | err = xfrm_state_update(x); | |
1422 | ||
1423 | if (err < 0) { | |
1424 | x->km.state = XFRM_STATE_DEAD; | |
1425 | xfrm_state_put(x); | |
7d6dfe1f | 1426 | goto out; |
1da177e4 LT |
1427 | } |
1428 | ||
26b15dad | 1429 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1430 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1431 | else |
f60f6b8f | 1432 | c.event = XFRM_MSG_UPDSA; |
26b15dad JHS |
1433 | c.seq = hdr->sadb_msg_seq; |
1434 | c.pid = hdr->sadb_msg_pid; | |
1435 | km_state_notify(x, &c); | |
7d6dfe1f | 1436 | out: |
26b15dad | 1437 | xfrm_state_put(x); |
26b15dad | 1438 | return err; |
1da177e4 LT |
1439 | } |
1440 | ||
1441 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1442 | { | |
1443 | struct xfrm_state *x; | |
26b15dad JHS |
1444 | struct km_event c; |
1445 | int err; | |
1da177e4 LT |
1446 | |
1447 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1448 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1449 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1450 | return -EINVAL; | |
1451 | ||
1452 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1453 | if (x == NULL) | |
1454 | return -ESRCH; | |
1455 | ||
1456 | if (xfrm_state_kern(x)) { | |
1457 | xfrm_state_put(x); | |
1458 | return -EPERM; | |
1459 | } | |
1460 | ||
26b15dad JHS |
1461 | err = xfrm_state_delete(x); |
1462 | if (err < 0) { | |
1463 | xfrm_state_put(x); | |
1464 | return err; | |
1465 | } | |
1da177e4 | 1466 | |
26b15dad JHS |
1467 | c.seq = hdr->sadb_msg_seq; |
1468 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1469 | c.event = XFRM_MSG_DELSA; |
26b15dad JHS |
1470 | km_state_notify(x, &c); |
1471 | xfrm_state_put(x); | |
1da177e4 | 1472 | |
26b15dad | 1473 | return err; |
1da177e4 LT |
1474 | } |
1475 | ||
1476 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1477 | { | |
1478 | __u8 proto; | |
1479 | struct sk_buff *out_skb; | |
1480 | struct sadb_msg *out_hdr; | |
1481 | struct xfrm_state *x; | |
1482 | ||
1483 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1484 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1485 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1486 | return -EINVAL; | |
1487 | ||
1488 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1489 | if (x == NULL) | |
1490 | return -ESRCH; | |
1491 | ||
1492 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | |
1493 | proto = x->id.proto; | |
1494 | xfrm_state_put(x); | |
1495 | if (IS_ERR(out_skb)) | |
1496 | return PTR_ERR(out_skb); | |
1497 | ||
1498 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1499 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1500 | out_hdr->sadb_msg_type = SADB_DUMP; | |
1501 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1502 | out_hdr->sadb_msg_errno = 0; | |
1503 | out_hdr->sadb_msg_reserved = 0; | |
1504 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1505 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1506 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); | |
1507 | ||
1508 | return 0; | |
1509 | } | |
1510 | ||
00fa0233 | 1511 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, |
dd0fc66f | 1512 | gfp_t allocation) |
1da177e4 LT |
1513 | { |
1514 | struct sk_buff *skb; | |
1515 | struct sadb_msg *hdr; | |
1516 | int len, auth_len, enc_len, i; | |
1517 | ||
1518 | auth_len = xfrm_count_auth_supported(); | |
1519 | if (auth_len) { | |
1520 | auth_len *= sizeof(struct sadb_alg); | |
1521 | auth_len += sizeof(struct sadb_supported); | |
1522 | } | |
1523 | ||
1524 | enc_len = xfrm_count_enc_supported(); | |
1525 | if (enc_len) { | |
1526 | enc_len *= sizeof(struct sadb_alg); | |
1527 | enc_len += sizeof(struct sadb_supported); | |
1528 | } | |
1529 | ||
1530 | len = enc_len + auth_len + sizeof(struct sadb_msg); | |
1531 | ||
1532 | skb = alloc_skb(len + 16, allocation); | |
1533 | if (!skb) | |
1534 | goto out_put_algs; | |
1535 | ||
1536 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1537 | pfkey_hdr_dup(hdr, orig); | |
1538 | hdr->sadb_msg_errno = 0; | |
1539 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1540 | ||
1541 | if (auth_len) { | |
1542 | struct sadb_supported *sp; | |
1543 | struct sadb_alg *ap; | |
1544 | ||
1545 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1546 | ap = (struct sadb_alg *) (sp + 1); | |
1547 | ||
1548 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1549 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1550 | ||
1551 | for (i = 0; ; i++) { | |
1552 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1553 | if (!aalg) | |
1554 | break; | |
1555 | if (aalg->available) | |
1556 | *ap++ = aalg->desc; | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | if (enc_len) { | |
1561 | struct sadb_supported *sp; | |
1562 | struct sadb_alg *ap; | |
1563 | ||
1564 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1565 | ap = (struct sadb_alg *) (sp + 1); | |
1566 | ||
1567 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1568 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1569 | ||
1570 | for (i = 0; ; i++) { | |
1571 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1572 | if (!ealg) | |
1573 | break; | |
1574 | if (ealg->available) | |
1575 | *ap++ = ealg->desc; | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | out_put_algs: | |
1580 | return skb; | |
1581 | } | |
1582 | ||
1583 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1584 | { | |
1585 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1586 | struct sk_buff *supp_skb; | |
1587 | ||
1588 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1589 | return -EINVAL; | |
1590 | ||
1591 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1592 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1593 | return -EEXIST; | |
1594 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1595 | } | |
1596 | ||
1597 | xfrm_probe_algs(); | |
1598 | ||
1599 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); | |
1600 | if (!supp_skb) { | |
1601 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1602 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1603 | ||
1604 | return -ENOBUFS; | |
1605 | } | |
1606 | ||
1607 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); | |
1608 | ||
1609 | return 0; | |
1610 | } | |
1611 | ||
26b15dad JHS |
1612 | static int key_notify_sa_flush(struct km_event *c) |
1613 | { | |
1614 | struct sk_buff *skb; | |
1615 | struct sadb_msg *hdr; | |
1616 | ||
1617 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1618 | if (!skb) | |
1619 | return -ENOBUFS; | |
1620 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1621 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
26b15dad JHS |
1622 | hdr->sadb_msg_seq = c->seq; |
1623 | hdr->sadb_msg_pid = c->pid; | |
1624 | hdr->sadb_msg_version = PF_KEY_V2; | |
1625 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1626 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1627 | ||
1628 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1629 | ||
1630 | return 0; | |
1631 | } | |
1632 | ||
1da177e4 LT |
1633 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1634 | { | |
1635 | unsigned proto; | |
26b15dad | 1636 | struct km_event c; |
1da177e4 LT |
1637 | |
1638 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1639 | if (proto == 0) | |
1640 | return -EINVAL; | |
1641 | ||
1da177e4 | 1642 | xfrm_state_flush(proto); |
bf08867f | 1643 | c.data.proto = proto; |
26b15dad JHS |
1644 | c.seq = hdr->sadb_msg_seq; |
1645 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1646 | c.event = XFRM_MSG_FLUSHSA; |
26b15dad | 1647 | km_state_notify(NULL, &c); |
1da177e4 LT |
1648 | |
1649 | return 0; | |
1650 | } | |
1651 | ||
1652 | struct pfkey_dump_data | |
1653 | { | |
1654 | struct sk_buff *skb; | |
1655 | struct sadb_msg *hdr; | |
1656 | struct sock *sk; | |
1657 | }; | |
1658 | ||
1659 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) | |
1660 | { | |
1661 | struct pfkey_dump_data *data = ptr; | |
1662 | struct sk_buff *out_skb; | |
1663 | struct sadb_msg *out_hdr; | |
1664 | ||
1665 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | |
1666 | if (IS_ERR(out_skb)) | |
1667 | return PTR_ERR(out_skb); | |
1668 | ||
1669 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1670 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | |
1671 | out_hdr->sadb_msg_type = SADB_DUMP; | |
1672 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1673 | out_hdr->sadb_msg_errno = 0; | |
1674 | out_hdr->sadb_msg_reserved = 0; | |
1675 | out_hdr->sadb_msg_seq = count; | |
1676 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | |
1677 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | |
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1682 | { | |
1683 | u8 proto; | |
1684 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | |
1685 | ||
1686 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1687 | if (proto == 0) | |
1688 | return -EINVAL; | |
1689 | ||
1690 | return xfrm_state_walk(proto, dump_sa, &data); | |
1691 | } | |
1692 | ||
1693 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1694 | { | |
1695 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1696 | int satype = hdr->sadb_msg_satype; | |
1697 | ||
1698 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
1699 | /* XXX we mangle packet... */ | |
1700 | hdr->sadb_msg_errno = 0; | |
1701 | if (satype != 0 && satype != 1) | |
1702 | return -EINVAL; | |
1703 | pfk->promisc = satype; | |
1704 | } | |
1705 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1710 | { | |
1711 | int i; | |
1712 | u32 reqid = *(u32*)ptr; | |
1713 | ||
1714 | for (i=0; i<xp->xfrm_nr; i++) { | |
1715 | if (xp->xfrm_vec[i].reqid == reqid) | |
1716 | return -EEXIST; | |
1717 | } | |
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | static u32 gen_reqid(void) | |
1722 | { | |
1723 | u32 start; | |
1724 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; | |
1725 | ||
1726 | start = reqid; | |
1727 | do { | |
1728 | ++reqid; | |
1729 | if (reqid == 0) | |
1730 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
1731 | if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST) | |
1732 | return reqid; | |
1733 | } while (reqid != start); | |
1734 | return 0; | |
1735 | } | |
1736 | ||
1737 | static int | |
1738 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1739 | { | |
1740 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; | |
1741 | struct sockaddr_in *sin; | |
1742 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1743 | struct sockaddr_in6 *sin6; | |
1744 | #endif | |
1745 | ||
1746 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1747 | return -ELOOP; | |
1748 | ||
1749 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1750 | return -EINVAL; | |
1751 | ||
1752 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
1753 | t->mode = rq->sadb_x_ipsecrequest_mode-1; | |
1754 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) | |
1755 | t->optional = 1; | |
1756 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1757 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1758 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1759 | t->reqid = 0; | |
1760 | if (!t->reqid && !(t->reqid = gen_reqid())) | |
1761 | return -ENOBUFS; | |
1762 | } | |
1763 | ||
1764 | /* addresses present only in tunnel mode */ | |
1765 | if (t->mode) { | |
1766 | switch (xp->family) { | |
1767 | case AF_INET: | |
1768 | sin = (void*)(rq+1); | |
1769 | if (sin->sin_family != AF_INET) | |
1770 | return -EINVAL; | |
1771 | t->saddr.a4 = sin->sin_addr.s_addr; | |
1772 | sin++; | |
1773 | if (sin->sin_family != AF_INET) | |
1774 | return -EINVAL; | |
1775 | t->id.daddr.a4 = sin->sin_addr.s_addr; | |
1776 | break; | |
1777 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1778 | case AF_INET6: | |
1779 | sin6 = (void *)(rq+1); | |
1780 | if (sin6->sin6_family != AF_INET6) | |
1781 | return -EINVAL; | |
1782 | memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); | |
1783 | sin6++; | |
1784 | if (sin6->sin6_family != AF_INET6) | |
1785 | return -EINVAL; | |
1786 | memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); | |
1787 | break; | |
1788 | #endif | |
1789 | default: | |
1790 | return -EINVAL; | |
1791 | } | |
1792 | } | |
1793 | /* No way to set this via kame pfkey */ | |
1794 | t->aalgos = t->ealgos = t->calgos = ~0; | |
1795 | xp->xfrm_nr++; | |
1796 | return 0; | |
1797 | } | |
1798 | ||
1799 | static int | |
1800 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1801 | { | |
1802 | int err; | |
1803 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1804 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1805 | ||
1806 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | |
1807 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1808 | return err; | |
1809 | len -= rq->sadb_x_ipsecrequest_len; | |
1810 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1811 | } | |
1812 | return 0; | |
1813 | } | |
1814 | ||
df71837d TJ |
1815 | static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) |
1816 | { | |
1817 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1818 | ||
1819 | if (xfrm_ctx) { | |
1820 | int len = sizeof(struct sadb_x_sec_ctx); | |
1821 | len += xfrm_ctx->ctx_len; | |
1822 | return PFKEY_ALIGN8(len); | |
1823 | } | |
1824 | return 0; | |
1825 | } | |
1826 | ||
1da177e4 LT |
1827 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) |
1828 | { | |
1829 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
1830 | int socklen = (xp->family == AF_INET ? | |
1831 | sizeof(struct sockaddr_in) : | |
1832 | sizeof(struct sockaddr_in6)); | |
1833 | ||
1834 | return sizeof(struct sadb_msg) + | |
1835 | (sizeof(struct sadb_lifetime) * 3) + | |
1836 | (sizeof(struct sadb_address) * 2) + | |
1837 | (sockaddr_size * 2) + | |
1838 | sizeof(struct sadb_x_policy) + | |
1839 | (xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) + | |
df71837d TJ |
1840 | (socklen * 2))) + |
1841 | pfkey_xfrm_policy2sec_ctx_size(xp); | |
1da177e4 LT |
1842 | } |
1843 | ||
1844 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) | |
1845 | { | |
1846 | struct sk_buff *skb; | |
1847 | int size; | |
1848 | ||
1849 | size = pfkey_xfrm_policy2msg_size(xp); | |
1850 | ||
1851 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
1852 | if (skb == NULL) | |
1853 | return ERR_PTR(-ENOBUFS); | |
1854 | ||
1855 | return skb; | |
1856 | } | |
1857 | ||
1858 | static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) | |
1859 | { | |
1860 | struct sadb_msg *hdr; | |
1861 | struct sadb_address *addr; | |
1862 | struct sadb_lifetime *lifetime; | |
1863 | struct sadb_x_policy *pol; | |
1864 | struct sockaddr_in *sin; | |
df71837d TJ |
1865 | struct sadb_x_sec_ctx *sec_ctx; |
1866 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
1867 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1868 | struct sockaddr_in6 *sin6; | |
1869 | #endif | |
1870 | int i; | |
1871 | int size; | |
1872 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
1873 | int socklen = (xp->family == AF_INET ? | |
1874 | sizeof(struct sockaddr_in) : | |
1875 | sizeof(struct sockaddr_in6)); | |
1876 | ||
1877 | size = pfkey_xfrm_policy2msg_size(xp); | |
1878 | ||
1879 | /* call should fill header later */ | |
1880 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
1881 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
1882 | ||
1883 | /* src address */ | |
1884 | addr = (struct sadb_address*) skb_put(skb, | |
1885 | sizeof(struct sadb_address)+sockaddr_size); | |
1886 | addr->sadb_address_len = | |
1887 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
1888 | sizeof(uint64_t); | |
1889 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
1890 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
1891 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
1892 | addr->sadb_address_reserved = 0; | |
1893 | /* src address */ | |
1894 | if (xp->family == AF_INET) { | |
1895 | sin = (struct sockaddr_in *) (addr + 1); | |
1896 | sin->sin_family = AF_INET; | |
1897 | sin->sin_addr.s_addr = xp->selector.saddr.a4; | |
1898 | sin->sin_port = xp->selector.sport; | |
1899 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
1900 | } | |
1901 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1902 | else if (xp->family == AF_INET6) { | |
1903 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
1904 | sin6->sin6_family = AF_INET6; | |
1905 | sin6->sin6_port = xp->selector.sport; | |
1906 | sin6->sin6_flowinfo = 0; | |
1907 | memcpy(&sin6->sin6_addr, xp->selector.saddr.a6, | |
1908 | sizeof(struct in6_addr)); | |
1909 | sin6->sin6_scope_id = 0; | |
1910 | } | |
1911 | #endif | |
1912 | else | |
1913 | BUG(); | |
1914 | ||
1915 | /* dst address */ | |
1916 | addr = (struct sadb_address*) skb_put(skb, | |
1917 | sizeof(struct sadb_address)+sockaddr_size); | |
1918 | addr->sadb_address_len = | |
1919 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
1920 | sizeof(uint64_t); | |
1921 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
1922 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
1923 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; | |
1924 | addr->sadb_address_reserved = 0; | |
1925 | if (xp->family == AF_INET) { | |
1926 | sin = (struct sockaddr_in *) (addr + 1); | |
1927 | sin->sin_family = AF_INET; | |
1928 | sin->sin_addr.s_addr = xp->selector.daddr.a4; | |
1929 | sin->sin_port = xp->selector.dport; | |
1930 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
1931 | } | |
1932 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1933 | else if (xp->family == AF_INET6) { | |
1934 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
1935 | sin6->sin6_family = AF_INET6; | |
1936 | sin6->sin6_port = xp->selector.dport; | |
1937 | sin6->sin6_flowinfo = 0; | |
1938 | memcpy(&sin6->sin6_addr, xp->selector.daddr.a6, | |
1939 | sizeof(struct in6_addr)); | |
1940 | sin6->sin6_scope_id = 0; | |
1941 | } | |
1942 | #endif | |
1943 | else | |
1944 | BUG(); | |
1945 | ||
1946 | /* hard time */ | |
1947 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
1948 | sizeof(struct sadb_lifetime)); | |
1949 | lifetime->sadb_lifetime_len = | |
1950 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
1951 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
1952 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
1953 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
1954 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
1955 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
1956 | /* soft time */ | |
1957 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
1958 | sizeof(struct sadb_lifetime)); | |
1959 | lifetime->sadb_lifetime_len = | |
1960 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
1961 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
1962 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
1963 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
1964 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
1965 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
1966 | /* current time */ | |
1967 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
1968 | sizeof(struct sadb_lifetime)); | |
1969 | lifetime->sadb_lifetime_len = | |
1970 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
1971 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
1972 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
1973 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
1974 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
1975 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
1976 | ||
1977 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
1978 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
1979 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
1980 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
1981 | if (xp->action == XFRM_POLICY_ALLOW) { | |
1982 | if (xp->xfrm_nr) | |
1983 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
1984 | else | |
1985 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
1986 | } | |
1987 | pol->sadb_x_policy_dir = dir+1; | |
1988 | pol->sadb_x_policy_id = xp->index; | |
1989 | pol->sadb_x_policy_priority = xp->priority; | |
1990 | ||
1991 | for (i=0; i<xp->xfrm_nr; i++) { | |
1992 | struct sadb_x_ipsecrequest *rq; | |
1993 | struct xfrm_tmpl *t = xp->xfrm_vec + i; | |
1994 | int req_size; | |
1995 | ||
1996 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
1997 | if (t->mode) | |
1998 | req_size += 2*socklen; | |
1999 | else | |
2000 | size -= 2*socklen; | |
2001 | rq = (void*)skb_put(skb, req_size); | |
2002 | pol->sadb_x_policy_len += req_size/8; | |
2003 | memset(rq, 0, sizeof(*rq)); | |
2004 | rq->sadb_x_ipsecrequest_len = req_size; | |
2005 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
2006 | rq->sadb_x_ipsecrequest_mode = t->mode+1; | |
2007 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; | |
2008 | if (t->reqid) | |
2009 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2010 | if (t->optional) | |
2011 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2012 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
2013 | if (t->mode) { | |
2014 | switch (xp->family) { | |
2015 | case AF_INET: | |
2016 | sin = (void*)(rq+1); | |
2017 | sin->sin_family = AF_INET; | |
2018 | sin->sin_addr.s_addr = t->saddr.a4; | |
2019 | sin->sin_port = 0; | |
2020 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2021 | sin++; | |
2022 | sin->sin_family = AF_INET; | |
2023 | sin->sin_addr.s_addr = t->id.daddr.a4; | |
2024 | sin->sin_port = 0; | |
2025 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2026 | break; | |
2027 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2028 | case AF_INET6: | |
2029 | sin6 = (void*)(rq+1); | |
2030 | sin6->sin6_family = AF_INET6; | |
2031 | sin6->sin6_port = 0; | |
2032 | sin6->sin6_flowinfo = 0; | |
2033 | memcpy(&sin6->sin6_addr, t->saddr.a6, | |
2034 | sizeof(struct in6_addr)); | |
2035 | sin6->sin6_scope_id = 0; | |
2036 | ||
2037 | sin6++; | |
2038 | sin6->sin6_family = AF_INET6; | |
2039 | sin6->sin6_port = 0; | |
2040 | sin6->sin6_flowinfo = 0; | |
2041 | memcpy(&sin6->sin6_addr, t->id.daddr.a6, | |
2042 | sizeof(struct in6_addr)); | |
2043 | sin6->sin6_scope_id = 0; | |
2044 | break; | |
2045 | #endif | |
2046 | default: | |
2047 | break; | |
2048 | } | |
2049 | } | |
2050 | } | |
df71837d TJ |
2051 | |
2052 | /* security context */ | |
2053 | if ((xfrm_ctx = xp->security)) { | |
2054 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2055 | ||
2056 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2057 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2058 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2059 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2060 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2061 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2062 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2063 | xfrm_ctx->ctx_len); | |
2064 | } | |
2065 | ||
1da177e4 LT |
2066 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2067 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
2068 | } | |
2069 | ||
26b15dad JHS |
2070 | static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2071 | { | |
2072 | struct sk_buff *out_skb; | |
2073 | struct sadb_msg *out_hdr; | |
2074 | int err; | |
2075 | ||
2076 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2077 | if (IS_ERR(out_skb)) { | |
2078 | err = PTR_ERR(out_skb); | |
2079 | goto out; | |
2080 | } | |
2081 | pfkey_xfrm_policy2msg(out_skb, xp, dir); | |
2082 | ||
2083 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2084 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2085 | ||
f60f6b8f | 2086 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2087 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2088 | else | |
2089 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2090 | out_hdr->sadb_msg_errno = 0; | |
2091 | out_hdr->sadb_msg_seq = c->seq; | |
2092 | out_hdr->sadb_msg_pid = c->pid; | |
2093 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2094 | out: | |
2095 | return 0; | |
2096 | ||
2097 | } | |
2098 | ||
1da177e4 LT |
2099 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2100 | { | |
df71837d | 2101 | int err = 0; |
1da177e4 LT |
2102 | struct sadb_lifetime *lifetime; |
2103 | struct sadb_address *sa; | |
2104 | struct sadb_x_policy *pol; | |
2105 | struct xfrm_policy *xp; | |
26b15dad | 2106 | struct km_event c; |
df71837d | 2107 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2108 | |
2109 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2110 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2111 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2112 | return -EINVAL; | |
2113 | ||
2114 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2115 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2116 | return -EINVAL; | |
2117 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2118 | return -EINVAL; | |
2119 | ||
2120 | xp = xfrm_policy_alloc(GFP_KERNEL); | |
2121 | if (xp == NULL) | |
2122 | return -ENOBUFS; | |
2123 | ||
2124 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2125 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2126 | xp->priority = pol->sadb_x_policy_priority; | |
2127 | ||
2128 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2129 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); | |
2130 | if (!xp->family) { | |
2131 | err = -EINVAL; | |
2132 | goto out; | |
2133 | } | |
2134 | xp->selector.family = xp->family; | |
2135 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2136 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2137 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2138 | if (xp->selector.sport) | |
2139 | xp->selector.sport_mask = ~0; | |
2140 | ||
2141 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], | |
2142 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); | |
2143 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2144 | ||
2145 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2146 | * in both addresses. | |
2147 | */ | |
2148 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2149 | ||
2150 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2151 | if (xp->selector.dport) | |
2152 | xp->selector.dport_mask = ~0; | |
2153 | ||
df71837d TJ |
2154 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2155 | if (sec_ctx != NULL) { | |
2156 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2157 | ||
2158 | if (!uctx) { | |
2159 | err = -ENOBUFS; | |
2160 | goto out; | |
2161 | } | |
2162 | ||
2163 | err = security_xfrm_policy_alloc(xp, uctx); | |
2164 | kfree(uctx); | |
2165 | ||
2166 | if (err) | |
2167 | goto out; | |
2168 | } | |
2169 | ||
1da177e4 LT |
2170 | xp->lft.soft_byte_limit = XFRM_INF; |
2171 | xp->lft.hard_byte_limit = XFRM_INF; | |
2172 | xp->lft.soft_packet_limit = XFRM_INF; | |
2173 | xp->lft.hard_packet_limit = XFRM_INF; | |
2174 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2175 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2176 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2177 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2178 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2179 | } | |
2180 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2181 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2182 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2183 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2184 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2185 | } | |
2186 | xp->xfrm_nr = 0; | |
2187 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2188 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2189 | goto out; | |
2190 | ||
1da177e4 LT |
2191 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2192 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d TJ |
2193 | |
2194 | if (err) | |
2195 | goto out; | |
1da177e4 | 2196 | |
26b15dad | 2197 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f HX |
2198 | c.event = XFRM_MSG_UPDPOLICY; |
2199 | else | |
2200 | c.event = XFRM_MSG_NEWPOLICY; | |
1da177e4 | 2201 | |
26b15dad JHS |
2202 | c.seq = hdr->sadb_msg_seq; |
2203 | c.pid = hdr->sadb_msg_pid; | |
1da177e4 | 2204 | |
26b15dad JHS |
2205 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2206 | xfrm_pol_put(xp); | |
1da177e4 LT |
2207 | return 0; |
2208 | ||
2209 | out: | |
df71837d | 2210 | security_xfrm_policy_free(xp); |
1da177e4 LT |
2211 | kfree(xp); |
2212 | return err; | |
2213 | } | |
2214 | ||
2215 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2216 | { | |
2217 | int err; | |
2218 | struct sadb_address *sa; | |
2219 | struct sadb_x_policy *pol; | |
df71837d | 2220 | struct xfrm_policy *xp, tmp; |
1da177e4 | 2221 | struct xfrm_selector sel; |
26b15dad | 2222 | struct km_event c; |
df71837d | 2223 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2224 | |
2225 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2226 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2227 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2228 | return -EINVAL; | |
2229 | ||
2230 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2231 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2232 | return -EINVAL; | |
2233 | ||
2234 | memset(&sel, 0, sizeof(sel)); | |
2235 | ||
2236 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2237 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2238 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2239 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2240 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2241 | if (sel.sport) | |
2242 | sel.sport_mask = ~0; | |
2243 | ||
2244 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], | |
2245 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2246 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2247 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2248 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2249 | if (sel.dport) | |
2250 | sel.dport_mask = ~0; | |
2251 | ||
df71837d TJ |
2252 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2253 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
2254 | ||
2255 | if (sec_ctx != NULL) { | |
2256 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2257 | ||
2258 | if (!uctx) | |
2259 | return -ENOMEM; | |
2260 | ||
2261 | err = security_xfrm_policy_alloc(&tmp, uctx); | |
2262 | kfree(uctx); | |
2263 | ||
2264 | if (err) | |
2265 | return err; | |
2266 | } | |
2267 | ||
2268 | xp = xfrm_policy_bysel_ctx(pol->sadb_x_policy_dir-1, &sel, tmp.security, 1); | |
2269 | security_xfrm_policy_free(&tmp); | |
1da177e4 LT |
2270 | if (xp == NULL) |
2271 | return -ENOENT; | |
2272 | ||
2273 | err = 0; | |
2274 | ||
26b15dad JHS |
2275 | c.seq = hdr->sadb_msg_seq; |
2276 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 2277 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2278 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2279 | ||
2280 | xfrm_pol_put(xp); | |
2281 | return err; | |
2282 | } | |
2283 | ||
2284 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) | |
2285 | { | |
2286 | int err; | |
2287 | struct sk_buff *out_skb; | |
2288 | struct sadb_msg *out_hdr; | |
2289 | err = 0; | |
2290 | ||
1da177e4 LT |
2291 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2292 | if (IS_ERR(out_skb)) { | |
2293 | err = PTR_ERR(out_skb); | |
2294 | goto out; | |
2295 | } | |
26b15dad | 2296 | pfkey_xfrm_policy2msg(out_skb, xp, dir); |
1da177e4 LT |
2297 | |
2298 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2299 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2300 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2301 | out_hdr->sadb_msg_satype = 0; |
2302 | out_hdr->sadb_msg_errno = 0; | |
2303 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2304 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
26b15dad | 2305 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); |
1da177e4 LT |
2306 | err = 0; |
2307 | ||
2308 | out: | |
1da177e4 LT |
2309 | return err; |
2310 | } | |
2311 | ||
2312 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2313 | { | |
77d8d7a6 | 2314 | unsigned int dir; |
1da177e4 LT |
2315 | int err; |
2316 | struct sadb_x_policy *pol; | |
2317 | struct xfrm_policy *xp; | |
26b15dad | 2318 | struct km_event c; |
1da177e4 LT |
2319 | |
2320 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2321 | return -EINVAL; | |
2322 | ||
77d8d7a6 HX |
2323 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2324 | if (dir >= XFRM_POLICY_MAX) | |
2325 | return -EINVAL; | |
2326 | ||
2327 | xp = xfrm_policy_byid(dir, pol->sadb_x_policy_id, | |
1da177e4 LT |
2328 | hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
2329 | if (xp == NULL) | |
2330 | return -ENOENT; | |
2331 | ||
2332 | err = 0; | |
2333 | ||
26b15dad JHS |
2334 | c.seq = hdr->sadb_msg_seq; |
2335 | c.pid = hdr->sadb_msg_pid; | |
2336 | if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) { | |
bf08867f | 2337 | c.data.byid = 1; |
f60f6b8f | 2338 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2339 | km_policy_notify(xp, dir, &c); |
26b15dad | 2340 | } else { |
77d8d7a6 | 2341 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2342 | } |
1da177e4 | 2343 | |
1da177e4 LT |
2344 | xfrm_pol_put(xp); |
2345 | return err; | |
2346 | } | |
2347 | ||
2348 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2349 | { | |
2350 | struct pfkey_dump_data *data = ptr; | |
2351 | struct sk_buff *out_skb; | |
2352 | struct sadb_msg *out_hdr; | |
2353 | ||
2354 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2355 | if (IS_ERR(out_skb)) | |
2356 | return PTR_ERR(out_skb); | |
2357 | ||
2358 | pfkey_xfrm_policy2msg(out_skb, xp, dir); | |
2359 | ||
2360 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2361 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | |
2362 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; | |
2363 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2364 | out_hdr->sadb_msg_errno = 0; | |
2365 | out_hdr->sadb_msg_seq = count; | |
2366 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | |
2367 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | |
2368 | return 0; | |
2369 | } | |
2370 | ||
2371 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2372 | { | |
2373 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | |
2374 | ||
2375 | return xfrm_policy_walk(dump_sp, &data); | |
2376 | } | |
2377 | ||
26b15dad | 2378 | static int key_notify_policy_flush(struct km_event *c) |
1da177e4 LT |
2379 | { |
2380 | struct sk_buff *skb_out; | |
26b15dad | 2381 | struct sadb_msg *hdr; |
1da177e4 | 2382 | |
26b15dad | 2383 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2384 | if (!skb_out) |
2385 | return -ENOBUFS; | |
26b15dad JHS |
2386 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
2387 | hdr->sadb_msg_seq = c->seq; | |
2388 | hdr->sadb_msg_pid = c->pid; | |
2389 | hdr->sadb_msg_version = PF_KEY_V2; | |
2390 | hdr->sadb_msg_errno = (uint8_t) 0; | |
2391 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
2392 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2393 | return 0; | |
1da177e4 | 2394 | |
26b15dad JHS |
2395 | } |
2396 | ||
2397 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2398 | { | |
2399 | struct km_event c; | |
1da177e4 | 2400 | |
26b15dad | 2401 | xfrm_policy_flush(); |
f60f6b8f | 2402 | c.event = XFRM_MSG_FLUSHPOLICY; |
26b15dad JHS |
2403 | c.pid = hdr->sadb_msg_pid; |
2404 | c.seq = hdr->sadb_msg_seq; | |
2405 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
2406 | |
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
2411 | struct sadb_msg *hdr, void **ext_hdrs); | |
2412 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { | |
2413 | [SADB_RESERVED] = pfkey_reserved, | |
2414 | [SADB_GETSPI] = pfkey_getspi, | |
2415 | [SADB_UPDATE] = pfkey_add, | |
2416 | [SADB_ADD] = pfkey_add, | |
2417 | [SADB_DELETE] = pfkey_delete, | |
2418 | [SADB_GET] = pfkey_get, | |
2419 | [SADB_ACQUIRE] = pfkey_acquire, | |
2420 | [SADB_REGISTER] = pfkey_register, | |
2421 | [SADB_EXPIRE] = NULL, | |
2422 | [SADB_FLUSH] = pfkey_flush, | |
2423 | [SADB_DUMP] = pfkey_dump, | |
2424 | [SADB_X_PROMISC] = pfkey_promisc, | |
2425 | [SADB_X_PCHANGE] = NULL, | |
2426 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2427 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2428 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2429 | [SADB_X_SPDGET] = pfkey_spdget, | |
2430 | [SADB_X_SPDACQUIRE] = NULL, | |
2431 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2432 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2433 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2434 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
2435 | }; | |
2436 | ||
2437 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) | |
2438 | { | |
2439 | void *ext_hdrs[SADB_EXT_MAX]; | |
2440 | int err; | |
2441 | ||
2442 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
2443 | BROADCAST_PROMISC_ONLY, NULL); | |
2444 | ||
2445 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2446 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2447 | if (!err) { | |
2448 | err = -EOPNOTSUPP; | |
2449 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2450 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2451 | } | |
2452 | return err; | |
2453 | } | |
2454 | ||
2455 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2456 | { | |
2457 | struct sadb_msg *hdr = NULL; | |
2458 | ||
2459 | if (skb->len < sizeof(*hdr)) { | |
2460 | *errp = -EMSGSIZE; | |
2461 | } else { | |
2462 | hdr = (struct sadb_msg *) skb->data; | |
2463 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2464 | hdr->sadb_msg_reserved != 0 || | |
2465 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2466 | hdr->sadb_msg_type > SADB_MAX)) { | |
2467 | hdr = NULL; | |
2468 | *errp = -EINVAL; | |
2469 | } else if (hdr->sadb_msg_len != (skb->len / | |
2470 | sizeof(uint64_t)) || | |
2471 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2472 | sizeof(uint64_t))) { | |
2473 | hdr = NULL; | |
2474 | *errp = -EMSGSIZE; | |
2475 | } else { | |
2476 | *errp = 0; | |
2477 | } | |
2478 | } | |
2479 | return hdr; | |
2480 | } | |
2481 | ||
2482 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2483 | { | |
2484 | return t->aalgos & (1 << d->desc.sadb_alg_id); | |
2485 | } | |
2486 | ||
2487 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2488 | { | |
2489 | return t->ealgos & (1 << d->desc.sadb_alg_id); | |
2490 | } | |
2491 | ||
2492 | static int count_ah_combs(struct xfrm_tmpl *t) | |
2493 | { | |
2494 | int i, sz = 0; | |
2495 | ||
2496 | for (i = 0; ; i++) { | |
2497 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2498 | if (!aalg) | |
2499 | break; | |
2500 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2501 | sz += sizeof(struct sadb_comb); | |
2502 | } | |
2503 | return sz + sizeof(struct sadb_prop); | |
2504 | } | |
2505 | ||
2506 | static int count_esp_combs(struct xfrm_tmpl *t) | |
2507 | { | |
2508 | int i, k, sz = 0; | |
2509 | ||
2510 | for (i = 0; ; i++) { | |
2511 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2512 | if (!ealg) | |
2513 | break; | |
2514 | ||
2515 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) | |
2516 | continue; | |
2517 | ||
2518 | for (k = 1; ; k++) { | |
2519 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2520 | if (!aalg) | |
2521 | break; | |
2522 | ||
2523 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2524 | sz += sizeof(struct sadb_comb); | |
2525 | } | |
2526 | } | |
2527 | return sz + sizeof(struct sadb_prop); | |
2528 | } | |
2529 | ||
2530 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2531 | { | |
2532 | struct sadb_prop *p; | |
2533 | int i; | |
2534 | ||
2535 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2536 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2537 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2538 | p->sadb_prop_replay = 32; | |
2539 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2540 | ||
2541 | for (i = 0; ; i++) { | |
2542 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2543 | if (!aalg) | |
2544 | break; | |
2545 | ||
2546 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | |
2547 | struct sadb_comb *c; | |
2548 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2549 | memset(c, 0, sizeof(*c)); | |
2550 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2551 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2552 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2553 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2554 | c->sadb_comb_hard_addtime = 24*60*60; | |
2555 | c->sadb_comb_soft_addtime = 20*60*60; | |
2556 | c->sadb_comb_hard_usetime = 8*60*60; | |
2557 | c->sadb_comb_soft_usetime = 7*60*60; | |
2558 | } | |
2559 | } | |
2560 | } | |
2561 | ||
2562 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2563 | { | |
2564 | struct sadb_prop *p; | |
2565 | int i, k; | |
2566 | ||
2567 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2568 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2569 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2570 | p->sadb_prop_replay = 32; | |
2571 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2572 | ||
2573 | for (i=0; ; i++) { | |
2574 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2575 | if (!ealg) | |
2576 | break; | |
2577 | ||
2578 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) | |
2579 | continue; | |
2580 | ||
2581 | for (k = 1; ; k++) { | |
2582 | struct sadb_comb *c; | |
2583 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2584 | if (!aalg) | |
2585 | break; | |
2586 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | |
2587 | continue; | |
2588 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2589 | memset(c, 0, sizeof(*c)); | |
2590 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2591 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2592 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2593 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2594 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2595 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2596 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2597 | c->sadb_comb_hard_addtime = 24*60*60; | |
2598 | c->sadb_comb_soft_addtime = 20*60*60; | |
2599 | c->sadb_comb_hard_usetime = 8*60*60; | |
2600 | c->sadb_comb_soft_usetime = 7*60*60; | |
2601 | } | |
2602 | } | |
2603 | } | |
2604 | ||
26b15dad JHS |
2605 | static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) |
2606 | { | |
2607 | return 0; | |
2608 | } | |
2609 | ||
2610 | static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) | |
1da177e4 LT |
2611 | { |
2612 | struct sk_buff *out_skb; | |
2613 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2614 | int hard; |
2615 | int hsc; | |
2616 | ||
bf08867f | 2617 | hard = c->data.hard; |
26b15dad JHS |
2618 | if (hard) |
2619 | hsc = 2; | |
2620 | else | |
2621 | hsc = 1; | |
1da177e4 LT |
2622 | |
2623 | out_skb = pfkey_xfrm_state2msg(x, 0, hsc); | |
2624 | if (IS_ERR(out_skb)) | |
2625 | return PTR_ERR(out_skb); | |
2626 | ||
2627 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2628 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2629 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
2630 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2631 | out_hdr->sadb_msg_errno = 0; | |
2632 | out_hdr->sadb_msg_reserved = 0; | |
2633 | out_hdr->sadb_msg_seq = 0; | |
2634 | out_hdr->sadb_msg_pid = 0; | |
2635 | ||
2636 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
2637 | return 0; | |
2638 | } | |
2639 | ||
26b15dad JHS |
2640 | static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) |
2641 | { | |
2642 | switch (c->event) { | |
f60f6b8f | 2643 | case XFRM_MSG_EXPIRE: |
26b15dad | 2644 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
2645 | case XFRM_MSG_DELSA: |
2646 | case XFRM_MSG_NEWSA: | |
2647 | case XFRM_MSG_UPDSA: | |
26b15dad | 2648 | return key_notify_sa(x, c); |
f60f6b8f | 2649 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2650 | return key_notify_sa_flush(c); |
2651 | default: | |
2652 | printk("pfkey: Unknown SA event %d\n", c->event); | |
2653 | break; | |
2654 | } | |
2655 | ||
2656 | return 0; | |
2657 | } | |
2658 | ||
2659 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2660 | { | |
2661 | switch (c->event) { | |
f60f6b8f | 2662 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 2663 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
2664 | case XFRM_MSG_DELPOLICY: |
2665 | case XFRM_MSG_NEWPOLICY: | |
2666 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 2667 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 2668 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad JHS |
2669 | return key_notify_policy_flush(c); |
2670 | default: | |
2671 | printk("pfkey: Unknown policy event %d\n", c->event); | |
2672 | break; | |
2673 | } | |
2674 | ||
2675 | return 0; | |
2676 | } | |
2677 | ||
1da177e4 LT |
2678 | static u32 get_acqseq(void) |
2679 | { | |
2680 | u32 res; | |
2681 | static u32 acqseq; | |
2682 | static DEFINE_SPINLOCK(acqseq_lock); | |
2683 | ||
2684 | spin_lock_bh(&acqseq_lock); | |
2685 | res = (++acqseq ? : ++acqseq); | |
2686 | spin_unlock_bh(&acqseq_lock); | |
2687 | return res; | |
2688 | } | |
2689 | ||
2690 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | |
2691 | { | |
2692 | struct sk_buff *skb; | |
2693 | struct sadb_msg *hdr; | |
2694 | struct sadb_address *addr; | |
2695 | struct sadb_x_policy *pol; | |
2696 | struct sockaddr_in *sin; | |
2697 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2698 | struct sockaddr_in6 *sin6; | |
2699 | #endif | |
2700 | int sockaddr_size; | |
2701 | int size; | |
2702 | ||
2703 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
2704 | if (!sockaddr_size) | |
2705 | return -EINVAL; | |
2706 | ||
2707 | size = sizeof(struct sadb_msg) + | |
2708 | (sizeof(struct sadb_address) * 2) + | |
2709 | (sockaddr_size * 2) + | |
2710 | sizeof(struct sadb_x_policy); | |
2711 | ||
2712 | if (x->id.proto == IPPROTO_AH) | |
2713 | size += count_ah_combs(t); | |
2714 | else if (x->id.proto == IPPROTO_ESP) | |
2715 | size += count_esp_combs(t); | |
2716 | ||
2717 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
2718 | if (skb == NULL) | |
2719 | return -ENOMEM; | |
2720 | ||
2721 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
2722 | hdr->sadb_msg_version = PF_KEY_V2; | |
2723 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
2724 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2725 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
2726 | hdr->sadb_msg_errno = 0; | |
2727 | hdr->sadb_msg_reserved = 0; | |
2728 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
2729 | hdr->sadb_msg_pid = 0; | |
2730 | ||
2731 | /* src address */ | |
2732 | addr = (struct sadb_address*) skb_put(skb, | |
2733 | sizeof(struct sadb_address)+sockaddr_size); | |
2734 | addr->sadb_address_len = | |
2735 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2736 | sizeof(uint64_t); | |
2737 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2738 | addr->sadb_address_proto = 0; | |
2739 | addr->sadb_address_reserved = 0; | |
2740 | if (x->props.family == AF_INET) { | |
2741 | addr->sadb_address_prefixlen = 32; | |
2742 | ||
2743 | sin = (struct sockaddr_in *) (addr + 1); | |
2744 | sin->sin_family = AF_INET; | |
2745 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
2746 | sin->sin_port = 0; | |
2747 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2748 | } | |
2749 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2750 | else if (x->props.family == AF_INET6) { | |
2751 | addr->sadb_address_prefixlen = 128; | |
2752 | ||
2753 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
2754 | sin6->sin6_family = AF_INET6; | |
2755 | sin6->sin6_port = 0; | |
2756 | sin6->sin6_flowinfo = 0; | |
2757 | memcpy(&sin6->sin6_addr, | |
2758 | x->props.saddr.a6, sizeof(struct in6_addr)); | |
2759 | sin6->sin6_scope_id = 0; | |
2760 | } | |
2761 | #endif | |
2762 | else | |
2763 | BUG(); | |
2764 | ||
2765 | /* dst address */ | |
2766 | addr = (struct sadb_address*) skb_put(skb, | |
2767 | sizeof(struct sadb_address)+sockaddr_size); | |
2768 | addr->sadb_address_len = | |
2769 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2770 | sizeof(uint64_t); | |
2771 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2772 | addr->sadb_address_proto = 0; | |
2773 | addr->sadb_address_reserved = 0; | |
2774 | if (x->props.family == AF_INET) { | |
2775 | addr->sadb_address_prefixlen = 32; | |
2776 | ||
2777 | sin = (struct sockaddr_in *) (addr + 1); | |
2778 | sin->sin_family = AF_INET; | |
2779 | sin->sin_addr.s_addr = x->id.daddr.a4; | |
2780 | sin->sin_port = 0; | |
2781 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2782 | } | |
2783 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2784 | else if (x->props.family == AF_INET6) { | |
2785 | addr->sadb_address_prefixlen = 128; | |
2786 | ||
2787 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
2788 | sin6->sin6_family = AF_INET6; | |
2789 | sin6->sin6_port = 0; | |
2790 | sin6->sin6_flowinfo = 0; | |
2791 | memcpy(&sin6->sin6_addr, | |
2792 | x->id.daddr.a6, sizeof(struct in6_addr)); | |
2793 | sin6->sin6_scope_id = 0; | |
2794 | } | |
2795 | #endif | |
2796 | else | |
2797 | BUG(); | |
2798 | ||
2799 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2800 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2801 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2802 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2803 | pol->sadb_x_policy_dir = dir+1; | |
2804 | pol->sadb_x_policy_id = xp->index; | |
2805 | ||
2806 | /* Set sadb_comb's. */ | |
2807 | if (x->id.proto == IPPROTO_AH) | |
2808 | dump_ah_combs(skb, t); | |
2809 | else if (x->id.proto == IPPROTO_ESP) | |
2810 | dump_esp_combs(skb, t); | |
2811 | ||
2812 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
2813 | } | |
2814 | ||
2815 | static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt, | |
2816 | u8 *data, int len, int *dir) | |
2817 | { | |
2818 | struct xfrm_policy *xp; | |
2819 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 2820 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2821 | |
2822 | switch (family) { | |
2823 | case AF_INET: | |
2824 | if (opt != IP_IPSEC_POLICY) { | |
2825 | *dir = -EOPNOTSUPP; | |
2826 | return NULL; | |
2827 | } | |
2828 | break; | |
2829 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2830 | case AF_INET6: | |
2831 | if (opt != IPV6_IPSEC_POLICY) { | |
2832 | *dir = -EOPNOTSUPP; | |
2833 | return NULL; | |
2834 | } | |
2835 | break; | |
2836 | #endif | |
2837 | default: | |
2838 | *dir = -EINVAL; | |
2839 | return NULL; | |
2840 | } | |
2841 | ||
2842 | *dir = -EINVAL; | |
2843 | ||
2844 | if (len < sizeof(struct sadb_x_policy) || | |
2845 | pol->sadb_x_policy_len*8 > len || | |
2846 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
2847 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
2848 | return NULL; | |
2849 | ||
2850 | xp = xfrm_policy_alloc(GFP_ATOMIC); | |
2851 | if (xp == NULL) { | |
2852 | *dir = -ENOBUFS; | |
2853 | return NULL; | |
2854 | } | |
2855 | ||
2856 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2857 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2858 | ||
2859 | xp->lft.soft_byte_limit = XFRM_INF; | |
2860 | xp->lft.hard_byte_limit = XFRM_INF; | |
2861 | xp->lft.soft_packet_limit = XFRM_INF; | |
2862 | xp->lft.hard_packet_limit = XFRM_INF; | |
2863 | xp->family = family; | |
2864 | ||
2865 | xp->xfrm_nr = 0; | |
2866 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2867 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
2868 | goto out; | |
2869 | ||
df71837d TJ |
2870 | /* security context too */ |
2871 | if (len >= (pol->sadb_x_policy_len*8 + | |
2872 | sizeof(struct sadb_x_sec_ctx))) { | |
2873 | char *p = (char *)pol; | |
2874 | struct xfrm_user_sec_ctx *uctx; | |
2875 | ||
2876 | p += pol->sadb_x_policy_len*8; | |
2877 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
2878 | if (len < pol->sadb_x_policy_len*8 + | |
2879 | sec_ctx->sadb_x_sec_len) | |
2880 | goto out; | |
2881 | if ((*dir = verify_sec_ctx_len(p))) | |
2882 | goto out; | |
2883 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2884 | *dir = security_xfrm_policy_alloc(xp, uctx); | |
2885 | kfree(uctx); | |
2886 | ||
2887 | if (*dir) | |
2888 | goto out; | |
2889 | } | |
2890 | ||
1da177e4 LT |
2891 | *dir = pol->sadb_x_policy_dir-1; |
2892 | return xp; | |
2893 | ||
2894 | out: | |
df71837d | 2895 | security_xfrm_policy_free(xp); |
1da177e4 LT |
2896 | kfree(xp); |
2897 | return NULL; | |
2898 | } | |
2899 | ||
2900 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport) | |
2901 | { | |
2902 | struct sk_buff *skb; | |
2903 | struct sadb_msg *hdr; | |
2904 | struct sadb_sa *sa; | |
2905 | struct sadb_address *addr; | |
2906 | struct sadb_x_nat_t_port *n_port; | |
2907 | struct sockaddr_in *sin; | |
2908 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2909 | struct sockaddr_in6 *sin6; | |
2910 | #endif | |
2911 | int sockaddr_size; | |
2912 | int size; | |
2913 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
2914 | struct xfrm_encap_tmpl *natt = NULL; | |
2915 | ||
2916 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
2917 | if (!sockaddr_size) | |
2918 | return -EINVAL; | |
2919 | ||
2920 | if (!satype) | |
2921 | return -EINVAL; | |
2922 | ||
2923 | if (!x->encap) | |
2924 | return -EINVAL; | |
2925 | ||
2926 | natt = x->encap; | |
2927 | ||
2928 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
2929 | * | |
2930 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
2931 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
2932 | */ | |
2933 | ||
2934 | size = sizeof(struct sadb_msg) + | |
2935 | sizeof(struct sadb_sa) + | |
2936 | (sizeof(struct sadb_address) * 2) + | |
2937 | (sockaddr_size * 2) + | |
2938 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
2939 | ||
2940 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
2941 | if (skb == NULL) | |
2942 | return -ENOMEM; | |
2943 | ||
2944 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
2945 | hdr->sadb_msg_version = PF_KEY_V2; | |
2946 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
2947 | hdr->sadb_msg_satype = satype; | |
2948 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
2949 | hdr->sadb_msg_errno = 0; | |
2950 | hdr->sadb_msg_reserved = 0; | |
2951 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
2952 | hdr->sadb_msg_pid = 0; | |
2953 | ||
2954 | /* SA */ | |
2955 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
2956 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
2957 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
2958 | sa->sadb_sa_spi = x->id.spi; | |
2959 | sa->sadb_sa_replay = 0; | |
2960 | sa->sadb_sa_state = 0; | |
2961 | sa->sadb_sa_auth = 0; | |
2962 | sa->sadb_sa_encrypt = 0; | |
2963 | sa->sadb_sa_flags = 0; | |
2964 | ||
2965 | /* ADDRESS_SRC (old addr) */ | |
2966 | addr = (struct sadb_address*) | |
2967 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
2968 | addr->sadb_address_len = | |
2969 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2970 | sizeof(uint64_t); | |
2971 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2972 | addr->sadb_address_proto = 0; | |
2973 | addr->sadb_address_reserved = 0; | |
2974 | if (x->props.family == AF_INET) { | |
2975 | addr->sadb_address_prefixlen = 32; | |
2976 | ||
2977 | sin = (struct sockaddr_in *) (addr + 1); | |
2978 | sin->sin_family = AF_INET; | |
2979 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
2980 | sin->sin_port = 0; | |
2981 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2982 | } | |
2983 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2984 | else if (x->props.family == AF_INET6) { | |
2985 | addr->sadb_address_prefixlen = 128; | |
2986 | ||
2987 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
2988 | sin6->sin6_family = AF_INET6; | |
2989 | sin6->sin6_port = 0; | |
2990 | sin6->sin6_flowinfo = 0; | |
2991 | memcpy(&sin6->sin6_addr, | |
2992 | x->props.saddr.a6, sizeof(struct in6_addr)); | |
2993 | sin6->sin6_scope_id = 0; | |
2994 | } | |
2995 | #endif | |
2996 | else | |
2997 | BUG(); | |
2998 | ||
2999 | /* NAT_T_SPORT (old port) */ | |
3000 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3001 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3002 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3003 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3004 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3005 | ||
3006 | /* ADDRESS_DST (new addr) */ | |
3007 | addr = (struct sadb_address*) | |
3008 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
3009 | addr->sadb_address_len = | |
3010 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3011 | sizeof(uint64_t); | |
3012 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3013 | addr->sadb_address_proto = 0; | |
3014 | addr->sadb_address_reserved = 0; | |
3015 | if (x->props.family == AF_INET) { | |
3016 | addr->sadb_address_prefixlen = 32; | |
3017 | ||
3018 | sin = (struct sockaddr_in *) (addr + 1); | |
3019 | sin->sin_family = AF_INET; | |
3020 | sin->sin_addr.s_addr = ipaddr->a4; | |
3021 | sin->sin_port = 0; | |
3022 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3023 | } | |
3024 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3025 | else if (x->props.family == AF_INET6) { | |
3026 | addr->sadb_address_prefixlen = 128; | |
3027 | ||
3028 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3029 | sin6->sin6_family = AF_INET6; | |
3030 | sin6->sin6_port = 0; | |
3031 | sin6->sin6_flowinfo = 0; | |
3032 | memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr)); | |
3033 | sin6->sin6_scope_id = 0; | |
3034 | } | |
3035 | #endif | |
3036 | else | |
3037 | BUG(); | |
3038 | ||
3039 | /* NAT_T_DPORT (new port) */ | |
3040 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3041 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3042 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3043 | n_port->sadb_x_nat_t_port_port = sport; | |
3044 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3045 | ||
3046 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
3047 | } | |
3048 | ||
3049 | static int pfkey_sendmsg(struct kiocb *kiocb, | |
3050 | struct socket *sock, struct msghdr *msg, size_t len) | |
3051 | { | |
3052 | struct sock *sk = sock->sk; | |
3053 | struct sk_buff *skb = NULL; | |
3054 | struct sadb_msg *hdr = NULL; | |
3055 | int err; | |
3056 | ||
3057 | err = -EOPNOTSUPP; | |
3058 | if (msg->msg_flags & MSG_OOB) | |
3059 | goto out; | |
3060 | ||
3061 | err = -EMSGSIZE; | |
3062 | if ((unsigned)len > sk->sk_sndbuf - 32) | |
3063 | goto out; | |
3064 | ||
3065 | err = -ENOBUFS; | |
3066 | skb = alloc_skb(len, GFP_KERNEL); | |
3067 | if (skb == NULL) | |
3068 | goto out; | |
3069 | ||
3070 | err = -EFAULT; | |
3071 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3072 | goto out; | |
3073 | ||
3074 | hdr = pfkey_get_base_msg(skb, &err); | |
3075 | if (!hdr) | |
3076 | goto out; | |
3077 | ||
3078 | down(&xfrm_cfg_sem); | |
3079 | err = pfkey_process(sk, skb, hdr); | |
3080 | up(&xfrm_cfg_sem); | |
3081 | ||
3082 | out: | |
3083 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3084 | err = 0; | |
3085 | if (skb) | |
3086 | kfree_skb(skb); | |
3087 | ||
3088 | return err ? : len; | |
3089 | } | |
3090 | ||
3091 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3092 | struct socket *sock, struct msghdr *msg, size_t len, | |
3093 | int flags) | |
3094 | { | |
3095 | struct sock *sk = sock->sk; | |
3096 | struct sk_buff *skb; | |
3097 | int copied, err; | |
3098 | ||
3099 | err = -EINVAL; | |
3100 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3101 | goto out; | |
3102 | ||
3103 | msg->msg_namelen = 0; | |
3104 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | |
3105 | if (skb == NULL) | |
3106 | goto out; | |
3107 | ||
3108 | copied = skb->len; | |
3109 | if (copied > len) { | |
3110 | msg->msg_flags |= MSG_TRUNC; | |
3111 | copied = len; | |
3112 | } | |
3113 | ||
3114 | skb->h.raw = skb->data; | |
3115 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
3116 | if (err) | |
3117 | goto out_free; | |
3118 | ||
3119 | sock_recv_timestamp(msg, sk, skb); | |
3120 | ||
3121 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3122 | ||
3123 | out_free: | |
3124 | skb_free_datagram(sk, skb); | |
3125 | out: | |
3126 | return err; | |
3127 | } | |
3128 | ||
90ddc4f0 | 3129 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3130 | .family = PF_KEY, |
3131 | .owner = THIS_MODULE, | |
3132 | /* Operations that make no sense on pfkey sockets. */ | |
3133 | .bind = sock_no_bind, | |
3134 | .connect = sock_no_connect, | |
3135 | .socketpair = sock_no_socketpair, | |
3136 | .accept = sock_no_accept, | |
3137 | .getname = sock_no_getname, | |
3138 | .ioctl = sock_no_ioctl, | |
3139 | .listen = sock_no_listen, | |
3140 | .shutdown = sock_no_shutdown, | |
3141 | .setsockopt = sock_no_setsockopt, | |
3142 | .getsockopt = sock_no_getsockopt, | |
3143 | .mmap = sock_no_mmap, | |
3144 | .sendpage = sock_no_sendpage, | |
3145 | ||
3146 | /* Now the operations that really occur. */ | |
3147 | .release = pfkey_release, | |
3148 | .poll = datagram_poll, | |
3149 | .sendmsg = pfkey_sendmsg, | |
3150 | .recvmsg = pfkey_recvmsg, | |
3151 | }; | |
3152 | ||
3153 | static struct net_proto_family pfkey_family_ops = { | |
3154 | .family = PF_KEY, | |
3155 | .create = pfkey_create, | |
3156 | .owner = THIS_MODULE, | |
3157 | }; | |
3158 | ||
3159 | #ifdef CONFIG_PROC_FS | |
3160 | static int pfkey_read_proc(char *buffer, char **start, off_t offset, | |
3161 | int length, int *eof, void *data) | |
3162 | { | |
3163 | off_t pos = 0; | |
3164 | off_t begin = 0; | |
3165 | int len = 0; | |
3166 | struct sock *s; | |
3167 | struct hlist_node *node; | |
3168 | ||
3169 | len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n"); | |
3170 | ||
3171 | read_lock(&pfkey_table_lock); | |
3172 | ||
3173 | sk_for_each(s, node, &pfkey_table) { | |
3174 | len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu", | |
3175 | s, | |
3176 | atomic_read(&s->sk_refcnt), | |
3177 | atomic_read(&s->sk_rmem_alloc), | |
3178 | atomic_read(&s->sk_wmem_alloc), | |
3179 | sock_i_uid(s), | |
3180 | sock_i_ino(s) | |
3181 | ); | |
3182 | ||
3183 | buffer[len++] = '\n'; | |
3184 | ||
3185 | pos = begin + len; | |
3186 | if (pos < offset) { | |
3187 | len = 0; | |
3188 | begin = pos; | |
3189 | } | |
3190 | if(pos > offset + length) | |
3191 | goto done; | |
3192 | } | |
3193 | *eof = 1; | |
3194 | ||
3195 | done: | |
3196 | read_unlock(&pfkey_table_lock); | |
3197 | ||
3198 | *start = buffer + (offset - begin); | |
3199 | len -= (offset - begin); | |
3200 | ||
3201 | if (len > length) | |
3202 | len = length; | |
3203 | if (len < 0) | |
3204 | len = 0; | |
3205 | ||
3206 | return len; | |
3207 | } | |
3208 | #endif | |
3209 | ||
3210 | static struct xfrm_mgr pfkeyv2_mgr = | |
3211 | { | |
3212 | .id = "pfkeyv2", | |
3213 | .notify = pfkey_send_notify, | |
3214 | .acquire = pfkey_send_acquire, | |
3215 | .compile_policy = pfkey_compile_policy, | |
3216 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3217 | .notify_policy = pfkey_send_policy_notify, |
1da177e4 LT |
3218 | }; |
3219 | ||
3220 | static void __exit ipsec_pfkey_exit(void) | |
3221 | { | |
3222 | xfrm_unregister_km(&pfkeyv2_mgr); | |
3223 | remove_proc_entry("net/pfkey", NULL); | |
3224 | sock_unregister(PF_KEY); | |
3225 | proto_unregister(&key_proto); | |
3226 | } | |
3227 | ||
3228 | static int __init ipsec_pfkey_init(void) | |
3229 | { | |
3230 | int err = proto_register(&key_proto, 0); | |
3231 | ||
3232 | if (err != 0) | |
3233 | goto out; | |
3234 | ||
3235 | err = sock_register(&pfkey_family_ops); | |
3236 | if (err != 0) | |
3237 | goto out_unregister_key_proto; | |
3238 | #ifdef CONFIG_PROC_FS | |
3239 | err = -ENOMEM; | |
3240 | if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL) | |
3241 | goto out_sock_unregister; | |
3242 | #endif | |
3243 | err = xfrm_register_km(&pfkeyv2_mgr); | |
3244 | if (err != 0) | |
3245 | goto out_remove_proc_entry; | |
3246 | out: | |
3247 | return err; | |
3248 | out_remove_proc_entry: | |
3249 | #ifdef CONFIG_PROC_FS | |
3250 | remove_proc_entry("net/pfkey", NULL); | |
3251 | out_sock_unregister: | |
3252 | #endif | |
3253 | sock_unregister(PF_KEY); | |
3254 | out_unregister_key_proto: | |
3255 | proto_unregister(&key_proto); | |
3256 | goto out; | |
3257 | } | |
3258 | ||
3259 | module_init(ipsec_pfkey_init); | |
3260 | module_exit(ipsec_pfkey_exit); | |
3261 | MODULE_LICENSE("GPL"); | |
3262 | MODULE_ALIAS_NETPROTO(PF_KEY); |