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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Maxim Giryaev <gem@asplinux.ru> | |
10 | * David S. Miller <davem@redhat.com> | |
11 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
12 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
13 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> | |
14 | * Derek Atkins <derek@ihtfp.com> | |
15 | */ | |
16 | ||
4fc268d2 | 17 | #include <linux/capability.h> |
1da177e4 LT |
18 | #include <linux/module.h> |
19 | #include <linux/kernel.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/pfkeyv2.h> | |
22 | #include <linux/ipsec.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/rtnetlink.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/in6.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/init.h> | |
29 | #include <net/xfrm.h> | |
161a09e7 | 30 | #include <linux/audit.h> |
1da177e4 LT |
31 | |
32 | #include <net/sock.h> | |
33 | ||
34 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) | |
35 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) | |
36 | ||
37 | ||
38 | /* List of all pfkey sockets. */ | |
39 | static HLIST_HEAD(pfkey_table); | |
40 | static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); | |
41 | static DEFINE_RWLOCK(pfkey_table_lock); | |
42 | static atomic_t pfkey_table_users = ATOMIC_INIT(0); | |
43 | ||
44 | static atomic_t pfkey_socks_nr = ATOMIC_INIT(0); | |
45 | ||
46 | struct pfkey_sock { | |
47 | /* struct sock must be the first member of struct pfkey_sock */ | |
48 | struct sock sk; | |
49 | int registered; | |
50 | int promisc; | |
51 | }; | |
52 | ||
53 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) | |
54 | { | |
55 | return (struct pfkey_sock *)sk; | |
56 | } | |
57 | ||
58 | static void pfkey_sock_destruct(struct sock *sk) | |
59 | { | |
60 | skb_queue_purge(&sk->sk_receive_queue); | |
61 | ||
62 | if (!sock_flag(sk, SOCK_DEAD)) { | |
63 | printk("Attempt to release alive pfkey socket: %p\n", sk); | |
64 | return; | |
65 | } | |
66 | ||
67 | BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc)); | |
68 | BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc)); | |
69 | ||
70 | atomic_dec(&pfkey_socks_nr); | |
71 | } | |
72 | ||
73 | static void pfkey_table_grab(void) | |
74 | { | |
75 | write_lock_bh(&pfkey_table_lock); | |
76 | ||
77 | if (atomic_read(&pfkey_table_users)) { | |
78 | DECLARE_WAITQUEUE(wait, current); | |
79 | ||
80 | add_wait_queue_exclusive(&pfkey_table_wait, &wait); | |
81 | for(;;) { | |
82 | set_current_state(TASK_UNINTERRUPTIBLE); | |
83 | if (atomic_read(&pfkey_table_users) == 0) | |
84 | break; | |
85 | write_unlock_bh(&pfkey_table_lock); | |
86 | schedule(); | |
87 | write_lock_bh(&pfkey_table_lock); | |
88 | } | |
89 | ||
90 | __set_current_state(TASK_RUNNING); | |
91 | remove_wait_queue(&pfkey_table_wait, &wait); | |
92 | } | |
93 | } | |
94 | ||
95 | static __inline__ void pfkey_table_ungrab(void) | |
96 | { | |
97 | write_unlock_bh(&pfkey_table_lock); | |
98 | wake_up(&pfkey_table_wait); | |
99 | } | |
100 | ||
101 | static __inline__ void pfkey_lock_table(void) | |
102 | { | |
103 | /* read_lock() synchronizes us to pfkey_table_grab */ | |
104 | ||
105 | read_lock(&pfkey_table_lock); | |
106 | atomic_inc(&pfkey_table_users); | |
107 | read_unlock(&pfkey_table_lock); | |
108 | } | |
109 | ||
110 | static __inline__ void pfkey_unlock_table(void) | |
111 | { | |
112 | if (atomic_dec_and_test(&pfkey_table_users)) | |
113 | wake_up(&pfkey_table_wait); | |
114 | } | |
115 | ||
116 | ||
90ddc4f0 | 117 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
118 | |
119 | static void pfkey_insert(struct sock *sk) | |
120 | { | |
121 | pfkey_table_grab(); | |
122 | sk_add_node(sk, &pfkey_table); | |
123 | pfkey_table_ungrab(); | |
124 | } | |
125 | ||
126 | static void pfkey_remove(struct sock *sk) | |
127 | { | |
128 | pfkey_table_grab(); | |
129 | sk_del_node_init(sk); | |
130 | pfkey_table_ungrab(); | |
131 | } | |
132 | ||
133 | static struct proto key_proto = { | |
134 | .name = "KEY", | |
135 | .owner = THIS_MODULE, | |
136 | .obj_size = sizeof(struct pfkey_sock), | |
137 | }; | |
138 | ||
139 | static int pfkey_create(struct socket *sock, int protocol) | |
140 | { | |
141 | struct sock *sk; | |
142 | int err; | |
143 | ||
144 | if (!capable(CAP_NET_ADMIN)) | |
145 | return -EPERM; | |
146 | if (sock->type != SOCK_RAW) | |
147 | return -ESOCKTNOSUPPORT; | |
148 | if (protocol != PF_KEY_V2) | |
149 | return -EPROTONOSUPPORT; | |
150 | ||
151 | err = -ENOMEM; | |
152 | sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1); | |
153 | if (sk == NULL) | |
154 | goto out; | |
8ff24541 | 155 | |
1da177e4 LT |
156 | sock->ops = &pfkey_ops; |
157 | sock_init_data(sock, sk); | |
158 | ||
159 | sk->sk_family = PF_KEY; | |
160 | sk->sk_destruct = pfkey_sock_destruct; | |
161 | ||
162 | atomic_inc(&pfkey_socks_nr); | |
163 | ||
164 | pfkey_insert(sk); | |
165 | ||
166 | return 0; | |
167 | out: | |
168 | return err; | |
169 | } | |
170 | ||
171 | static int pfkey_release(struct socket *sock) | |
172 | { | |
173 | struct sock *sk = sock->sk; | |
174 | ||
175 | if (!sk) | |
176 | return 0; | |
177 | ||
178 | pfkey_remove(sk); | |
179 | ||
180 | sock_orphan(sk); | |
181 | sock->sk = NULL; | |
182 | skb_queue_purge(&sk->sk_write_queue); | |
183 | sock_put(sk); | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | |
dd0fc66f | 189 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
190 | { |
191 | int err = -ENOBUFS; | |
192 | ||
193 | sock_hold(sk); | |
194 | if (*skb2 == NULL) { | |
195 | if (atomic_read(&skb->users) != 1) { | |
196 | *skb2 = skb_clone(skb, allocation); | |
197 | } else { | |
198 | *skb2 = skb; | |
199 | atomic_inc(&skb->users); | |
200 | } | |
201 | } | |
202 | if (*skb2 != NULL) { | |
203 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { | |
204 | skb_orphan(*skb2); | |
205 | skb_set_owner_r(*skb2, sk); | |
206 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | |
207 | sk->sk_data_ready(sk, (*skb2)->len); | |
208 | *skb2 = NULL; | |
209 | err = 0; | |
210 | } | |
211 | } | |
212 | sock_put(sk); | |
213 | return err; | |
214 | } | |
215 | ||
216 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
217 | #define BROADCAST_ALL 0 | |
218 | #define BROADCAST_ONE 1 | |
219 | #define BROADCAST_REGISTERED 2 | |
220 | #define BROADCAST_PROMISC_ONLY 4 | |
dd0fc66f | 221 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
1da177e4 LT |
222 | int broadcast_flags, struct sock *one_sk) |
223 | { | |
224 | struct sock *sk; | |
225 | struct hlist_node *node; | |
226 | struct sk_buff *skb2 = NULL; | |
227 | int err = -ESRCH; | |
228 | ||
229 | /* XXX Do we need something like netlink_overrun? I think | |
230 | * XXX PF_KEY socket apps will not mind current behavior. | |
231 | */ | |
232 | if (!skb) | |
233 | return -ENOMEM; | |
234 | ||
235 | pfkey_lock_table(); | |
236 | sk_for_each(sk, node, &pfkey_table) { | |
237 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
238 | int err2; | |
239 | ||
240 | /* Yes, it means that if you are meant to receive this | |
241 | * pfkey message you receive it twice as promiscuous | |
242 | * socket. | |
243 | */ | |
244 | if (pfk->promisc) | |
245 | pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
246 | ||
247 | /* the exact target will be processed later */ | |
248 | if (sk == one_sk) | |
249 | continue; | |
250 | if (broadcast_flags != BROADCAST_ALL) { | |
251 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
252 | continue; | |
253 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
254 | !pfk->registered) | |
255 | continue; | |
256 | if (broadcast_flags & BROADCAST_ONE) | |
257 | continue; | |
258 | } | |
259 | ||
260 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
261 | ||
262 | /* Error is cleare after succecful sending to at least one | |
263 | * registered KM */ | |
264 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
265 | err = err2; | |
266 | } | |
267 | pfkey_unlock_table(); | |
268 | ||
269 | if (one_sk != NULL) | |
270 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | |
271 | ||
272 | if (skb2) | |
273 | kfree_skb(skb2); | |
274 | kfree_skb(skb); | |
275 | return err; | |
276 | } | |
277 | ||
278 | static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) | |
279 | { | |
280 | *new = *orig; | |
281 | } | |
282 | ||
283 | static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) | |
284 | { | |
285 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
286 | struct sadb_msg *hdr; | |
287 | ||
288 | if (!skb) | |
289 | return -ENOBUFS; | |
290 | ||
291 | /* Woe be to the platform trying to support PFKEY yet | |
292 | * having normal errnos outside the 1-255 range, inclusive. | |
293 | */ | |
294 | err = -err; | |
295 | if (err == ERESTARTSYS || | |
296 | err == ERESTARTNOHAND || | |
297 | err == ERESTARTNOINTR) | |
298 | err = EINTR; | |
299 | if (err >= 512) | |
300 | err = EINVAL; | |
09a62660 | 301 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
302 | |
303 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
304 | pfkey_hdr_dup(hdr, orig); | |
305 | hdr->sadb_msg_errno = (uint8_t) err; | |
306 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
307 | sizeof(uint64_t)); | |
308 | ||
309 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | static u8 sadb_ext_min_len[] = { | |
315 | [SADB_EXT_RESERVED] = (u8) 0, | |
316 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
317 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
318 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
319 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
320 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
321 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
322 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
323 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
324 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
325 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
326 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
327 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
328 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
329 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
330 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
331 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
332 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
333 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
334 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
335 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
336 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
337 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
338 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 339 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
1da177e4 LT |
340 | }; |
341 | ||
342 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
343 | static int verify_address_len(void *p) | |
344 | { | |
345 | struct sadb_address *sp = p; | |
346 | struct sockaddr *addr = (struct sockaddr *)(sp + 1); | |
347 | struct sockaddr_in *sin; | |
348 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
349 | struct sockaddr_in6 *sin6; | |
350 | #endif | |
351 | int len; | |
352 | ||
353 | switch (addr->sa_family) { | |
354 | case AF_INET: | |
355 | len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1); | |
356 | len /= sizeof(uint64_t); | |
357 | if (sp->sadb_address_len != len || | |
358 | sp->sadb_address_prefixlen > 32) | |
359 | return -EINVAL; | |
360 | break; | |
361 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
362 | case AF_INET6: | |
363 | len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1); | |
364 | len /= sizeof(uint64_t); | |
365 | if (sp->sadb_address_len != len || | |
366 | sp->sadb_address_prefixlen > 128) | |
367 | return -EINVAL; | |
368 | break; | |
369 | #endif | |
370 | default: | |
371 | /* It is user using kernel to keep track of security | |
372 | * associations for another protocol, such as | |
373 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
374 | * lengths. | |
375 | * | |
376 | * XXX Actually, association/policy database is not yet | |
377 | * XXX able to cope with arbitrary sockaddr families. | |
378 | * XXX When it can, remove this -EINVAL. -DaveM | |
379 | */ | |
380 | return -EINVAL; | |
381 | break; | |
382 | }; | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
df71837d TJ |
387 | static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) |
388 | { | |
389 | int len = 0; | |
390 | ||
391 | len += sizeof(struct sadb_x_sec_ctx); | |
392 | len += sec_ctx->sadb_x_ctx_len; | |
393 | len += sizeof(uint64_t) - 1; | |
394 | len /= sizeof(uint64_t); | |
395 | ||
396 | return len; | |
397 | } | |
398 | ||
399 | static inline int verify_sec_ctx_len(void *p) | |
400 | { | |
401 | struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; | |
402 | int len; | |
403 | ||
404 | if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE) | |
405 | return -EINVAL; | |
406 | ||
407 | len = pfkey_sec_ctx_len(sec_ctx); | |
408 | ||
409 | if (sec_ctx->sadb_x_sec_len != len) | |
410 | return -EINVAL; | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) | |
416 | { | |
417 | struct xfrm_user_sec_ctx *uctx = NULL; | |
418 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
419 | ||
420 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); | |
421 | ||
422 | if (!uctx) | |
423 | return NULL; | |
424 | ||
425 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
426 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
427 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
428 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
429 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
430 | memcpy(uctx + 1, sec_ctx + 1, | |
431 | uctx->ctx_len); | |
432 | ||
433 | return uctx; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | static int present_and_same_family(struct sadb_address *src, |
437 | struct sadb_address *dst) | |
438 | { | |
439 | struct sockaddr *s_addr, *d_addr; | |
440 | ||
441 | if (!src || !dst) | |
442 | return 0; | |
443 | ||
444 | s_addr = (struct sockaddr *)(src + 1); | |
445 | d_addr = (struct sockaddr *)(dst + 1); | |
446 | if (s_addr->sa_family != d_addr->sa_family) | |
447 | return 0; | |
448 | if (s_addr->sa_family != AF_INET | |
449 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
450 | && s_addr->sa_family != AF_INET6 | |
451 | #endif | |
452 | ) | |
453 | return 0; | |
454 | ||
455 | return 1; | |
456 | } | |
457 | ||
458 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
459 | { | |
460 | char *p = (char *) hdr; | |
461 | int len = skb->len; | |
462 | ||
463 | len -= sizeof(*hdr); | |
464 | p += sizeof(*hdr); | |
465 | while (len > 0) { | |
466 | struct sadb_ext *ehdr = (struct sadb_ext *) p; | |
467 | uint16_t ext_type; | |
468 | int ext_len; | |
469 | ||
470 | ext_len = ehdr->sadb_ext_len; | |
471 | ext_len *= sizeof(uint64_t); | |
472 | ext_type = ehdr->sadb_ext_type; | |
473 | if (ext_len < sizeof(uint64_t) || | |
474 | ext_len > len || | |
475 | ext_type == SADB_EXT_RESERVED) | |
476 | return -EINVAL; | |
477 | ||
478 | if (ext_type <= SADB_EXT_MAX) { | |
479 | int min = (int) sadb_ext_min_len[ext_type]; | |
480 | if (ext_len < min) | |
481 | return -EINVAL; | |
482 | if (ext_hdrs[ext_type-1] != NULL) | |
483 | return -EINVAL; | |
484 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
485 | ext_type == SADB_EXT_ADDRESS_DST || | |
486 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
487 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
488 | if (verify_address_len(p)) | |
489 | return -EINVAL; | |
8ff24541 | 490 | } |
df71837d TJ |
491 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
492 | if (verify_sec_ctx_len(p)) | |
493 | return -EINVAL; | |
494 | } | |
1da177e4 LT |
495 | ext_hdrs[ext_type-1] = p; |
496 | } | |
497 | p += ext_len; | |
498 | len -= ext_len; | |
499 | } | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | static uint16_t | |
505 | pfkey_satype2proto(uint8_t satype) | |
506 | { | |
507 | switch (satype) { | |
508 | case SADB_SATYPE_UNSPEC: | |
509 | return IPSEC_PROTO_ANY; | |
510 | case SADB_SATYPE_AH: | |
511 | return IPPROTO_AH; | |
512 | case SADB_SATYPE_ESP: | |
513 | return IPPROTO_ESP; | |
514 | case SADB_X_SATYPE_IPCOMP: | |
515 | return IPPROTO_COMP; | |
516 | break; | |
517 | default: | |
518 | return 0; | |
519 | } | |
520 | /* NOTREACHED */ | |
521 | } | |
522 | ||
523 | static uint8_t | |
524 | pfkey_proto2satype(uint16_t proto) | |
525 | { | |
526 | switch (proto) { | |
527 | case IPPROTO_AH: | |
528 | return SADB_SATYPE_AH; | |
529 | case IPPROTO_ESP: | |
530 | return SADB_SATYPE_ESP; | |
531 | case IPPROTO_COMP: | |
532 | return SADB_X_SATYPE_IPCOMP; | |
533 | break; | |
534 | default: | |
535 | return 0; | |
536 | } | |
537 | /* NOTREACHED */ | |
538 | } | |
539 | ||
540 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
541 | * say specifically 'just raw sockets' as we encode them as 255. | |
542 | */ | |
543 | ||
544 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
545 | { | |
546 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); | |
547 | } | |
548 | ||
549 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
550 | { | |
551 | return (proto ? proto : IPSEC_PROTO_ANY); | |
552 | } | |
553 | ||
554 | static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, | |
555 | xfrm_address_t *xaddr) | |
556 | { | |
557 | switch (((struct sockaddr*)(addr + 1))->sa_family) { | |
558 | case AF_INET: | |
8ff24541 | 559 | xaddr->a4 = |
1da177e4 LT |
560 | ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr; |
561 | return AF_INET; | |
562 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
563 | case AF_INET6: | |
8ff24541 | 564 | memcpy(xaddr->a6, |
1da177e4 LT |
565 | &((struct sockaddr_in6 *)(addr + 1))->sin6_addr, |
566 | sizeof(struct in6_addr)); | |
567 | return AF_INET6; | |
568 | #endif | |
569 | default: | |
570 | return 0; | |
571 | } | |
572 | /* NOTREACHED */ | |
573 | } | |
574 | ||
575 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) | |
576 | { | |
577 | struct sadb_sa *sa; | |
578 | struct sadb_address *addr; | |
579 | uint16_t proto; | |
580 | unsigned short family; | |
581 | xfrm_address_t *xaddr; | |
582 | ||
583 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
584 | if (sa == NULL) | |
585 | return NULL; | |
586 | ||
587 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
588 | if (proto == 0) | |
589 | return NULL; | |
590 | ||
591 | /* sadb_address_len should be checked by caller */ | |
592 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
593 | if (addr == NULL) | |
594 | return NULL; | |
595 | ||
596 | family = ((struct sockaddr *)(addr + 1))->sa_family; | |
597 | switch (family) { | |
598 | case AF_INET: | |
599 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; | |
600 | break; | |
601 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
602 | case AF_INET6: | |
603 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; | |
604 | break; | |
605 | #endif | |
606 | default: | |
607 | xaddr = NULL; | |
608 | } | |
609 | ||
610 | if (!xaddr) | |
611 | return NULL; | |
612 | ||
613 | return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); | |
614 | } | |
615 | ||
616 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
617 | static int | |
618 | pfkey_sockaddr_size(sa_family_t family) | |
619 | { | |
620 | switch (family) { | |
621 | case AF_INET: | |
622 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in)); | |
623 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
624 | case AF_INET6: | |
625 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in6)); | |
626 | #endif | |
627 | default: | |
628 | return 0; | |
629 | } | |
630 | /* NOTREACHED */ | |
631 | } | |
632 | ||
55569ce2 KM |
633 | static inline int pfkey_mode_from_xfrm(int mode) |
634 | { | |
635 | switch(mode) { | |
636 | case XFRM_MODE_TRANSPORT: | |
637 | return IPSEC_MODE_TRANSPORT; | |
638 | case XFRM_MODE_TUNNEL: | |
639 | return IPSEC_MODE_TUNNEL; | |
640 | case XFRM_MODE_BEET: | |
641 | return IPSEC_MODE_BEET; | |
642 | default: | |
643 | return -1; | |
644 | } | |
645 | } | |
646 | ||
647 | static inline int pfkey_mode_to_xfrm(int mode) | |
648 | { | |
649 | switch(mode) { | |
650 | case IPSEC_MODE_ANY: /*XXX*/ | |
651 | case IPSEC_MODE_TRANSPORT: | |
652 | return XFRM_MODE_TRANSPORT; | |
653 | case IPSEC_MODE_TUNNEL: | |
654 | return XFRM_MODE_TUNNEL; | |
655 | case IPSEC_MODE_BEET: | |
656 | return XFRM_MODE_BEET; | |
657 | default: | |
658 | return -1; | |
659 | } | |
660 | } | |
661 | ||
1da177e4 LT |
662 | static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc) |
663 | { | |
664 | struct sk_buff *skb; | |
665 | struct sadb_msg *hdr; | |
666 | struct sadb_sa *sa; | |
667 | struct sadb_lifetime *lifetime; | |
668 | struct sadb_address *addr; | |
669 | struct sadb_key *key; | |
670 | struct sadb_x_sa2 *sa2; | |
671 | struct sockaddr_in *sin; | |
df71837d TJ |
672 | struct sadb_x_sec_ctx *sec_ctx; |
673 | struct xfrm_sec_ctx *xfrm_ctx; | |
674 | int ctx_size = 0; | |
1da177e4 LT |
675 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
676 | struct sockaddr_in6 *sin6; | |
677 | #endif | |
678 | int size; | |
679 | int auth_key_size = 0; | |
680 | int encrypt_key_size = 0; | |
681 | int sockaddr_size; | |
682 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 683 | int mode; |
1da177e4 LT |
684 | |
685 | /* address family check */ | |
686 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
687 | if (!sockaddr_size) | |
688 | return ERR_PTR(-EINVAL); | |
689 | ||
690 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
691 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 692 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
693 | sizeof(struct sadb_lifetime) + |
694 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
695 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 696 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
697 | sockaddr_size*2 + |
698 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
699 | |
700 | if ((xfrm_ctx = x->security)) { | |
701 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
702 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
703 | } | |
704 | ||
1da177e4 LT |
705 | /* identity & sensitivity */ |
706 | ||
707 | if ((x->props.family == AF_INET && | |
708 | x->sel.saddr.a4 != x->props.saddr.a4) | |
709 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
710 | || (x->props.family == AF_INET6 && | |
711 | memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr))) | |
712 | #endif | |
713 | ) | |
714 | size += sizeof(struct sadb_address) + sockaddr_size; | |
715 | ||
716 | if (add_keys) { | |
717 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
718 | auth_key_size = |
719 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
720 | size += sizeof(struct sadb_key) + auth_key_size; |
721 | } | |
722 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
723 | encrypt_key_size = |
724 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
725 | size += sizeof(struct sadb_key) + encrypt_key_size; |
726 | } | |
727 | } | |
728 | if (x->encap) | |
729 | natt = x->encap; | |
730 | ||
731 | if (natt && natt->encap_type) { | |
732 | size += sizeof(struct sadb_x_nat_t_type); | |
733 | size += sizeof(struct sadb_x_nat_t_port); | |
734 | size += sizeof(struct sadb_x_nat_t_port); | |
735 | } | |
736 | ||
737 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
738 | if (skb == NULL) | |
739 | return ERR_PTR(-ENOBUFS); | |
740 | ||
741 | /* call should fill header later */ | |
742 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
743 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
744 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
745 | ||
746 | /* sa */ | |
747 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
748 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
749 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
750 | sa->sadb_sa_spi = x->id.spi; | |
751 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
752 | switch (x->km.state) { |
753 | case XFRM_STATE_VALID: | |
754 | sa->sadb_sa_state = x->km.dying ? | |
755 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
756 | break; | |
757 | case XFRM_STATE_ACQ: | |
1da177e4 | 758 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
759 | break; |
760 | default: | |
1da177e4 | 761 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
762 | break; |
763 | } | |
1da177e4 LT |
764 | sa->sadb_sa_auth = 0; |
765 | if (x->aalg) { | |
766 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
767 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | |
768 | } | |
769 | sa->sadb_sa_encrypt = 0; | |
770 | BUG_ON(x->ealg && x->calg); | |
771 | if (x->ealg) { | |
772 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
773 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
774 | } | |
775 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
776 | if (x->calg) { | |
777 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
778 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
779 | } | |
780 | ||
781 | sa->sadb_sa_flags = 0; | |
782 | if (x->props.flags & XFRM_STATE_NOECN) | |
783 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
784 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
785 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
786 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
787 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
788 | |
789 | /* hard time */ | |
790 | if (hsc & 2) { | |
8ff24541 | 791 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
792 | sizeof(struct sadb_lifetime)); |
793 | lifetime->sadb_lifetime_len = | |
794 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
795 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
796 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
797 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
798 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
799 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
800 | } | |
801 | /* soft time */ | |
802 | if (hsc & 1) { | |
8ff24541 | 803 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
804 | sizeof(struct sadb_lifetime)); |
805 | lifetime->sadb_lifetime_len = | |
806 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
807 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
808 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
809 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
810 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
811 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
812 | } | |
813 | /* current time */ | |
814 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
815 | sizeof(struct sadb_lifetime)); | |
816 | lifetime->sadb_lifetime_len = | |
817 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
818 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
819 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
820 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
821 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
822 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
823 | /* src address */ | |
8ff24541 | 824 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 825 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 826 | addr->sadb_address_len = |
1da177e4 LT |
827 | (sizeof(struct sadb_address)+sockaddr_size)/ |
828 | sizeof(uint64_t); | |
829 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
830 | /* "if the ports are non-zero, then the sadb_address_proto field, |
831 | normally zero, MUST be filled in with the transport | |
1da177e4 | 832 | protocol's number." - RFC2367 */ |
8ff24541 | 833 | addr->sadb_address_proto = 0; |
1da177e4 LT |
834 | addr->sadb_address_reserved = 0; |
835 | if (x->props.family == AF_INET) { | |
836 | addr->sadb_address_prefixlen = 32; | |
837 | ||
838 | sin = (struct sockaddr_in *) (addr + 1); | |
839 | sin->sin_family = AF_INET; | |
840 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
841 | sin->sin_port = 0; | |
842 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
843 | } | |
844 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
845 | else if (x->props.family == AF_INET6) { | |
8ff24541 | 846 | addr->sadb_address_prefixlen = 128; |
1da177e4 LT |
847 | |
848 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
849 | sin6->sin6_family = AF_INET6; | |
850 | sin6->sin6_port = 0; | |
851 | sin6->sin6_flowinfo = 0; | |
8ff24541 | 852 | memcpy(&sin6->sin6_addr, x->props.saddr.a6, |
1da177e4 LT |
853 | sizeof(struct in6_addr)); |
854 | sin6->sin6_scope_id = 0; | |
8ff24541 | 855 | } |
1da177e4 LT |
856 | #endif |
857 | else | |
858 | BUG(); | |
859 | ||
860 | /* dst address */ | |
8ff24541 | 861 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 862 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 863 | addr->sadb_address_len = |
1da177e4 LT |
864 | (sizeof(struct sadb_address)+sockaddr_size)/ |
865 | sizeof(uint64_t); | |
866 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 YH |
867 | addr->sadb_address_proto = 0; |
868 | addr->sadb_address_prefixlen = 32; /* XXX */ | |
1da177e4 LT |
869 | addr->sadb_address_reserved = 0; |
870 | if (x->props.family == AF_INET) { | |
871 | sin = (struct sockaddr_in *) (addr + 1); | |
872 | sin->sin_family = AF_INET; | |
873 | sin->sin_addr.s_addr = x->id.daddr.a4; | |
874 | sin->sin_port = 0; | |
875 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
876 | ||
877 | if (x->sel.saddr.a4 != x->props.saddr.a4) { | |
8ff24541 | 878 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 879 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 880 | addr->sadb_address_len = |
1da177e4 LT |
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 | sin = (struct sockaddr_in *) (addr + 1); | |
890 | sin->sin_family = AF_INET; | |
891 | sin->sin_addr.s_addr = x->sel.saddr.a4; | |
892 | sin->sin_port = x->sel.sport; | |
893 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
894 | } | |
895 | } | |
896 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
897 | else if (x->props.family == AF_INET6) { | |
898 | addr->sadb_address_prefixlen = 128; | |
899 | ||
900 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
901 | sin6->sin6_family = AF_INET6; | |
902 | sin6->sin6_port = 0; | |
903 | sin6->sin6_flowinfo = 0; | |
904 | memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr)); | |
905 | sin6->sin6_scope_id = 0; | |
906 | ||
907 | if (memcmp (x->sel.saddr.a6, x->props.saddr.a6, | |
908 | sizeof(struct in6_addr))) { | |
8ff24541 | 909 | addr = (struct sadb_address *) skb_put(skb, |
1da177e4 | 910 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 911 | addr->sadb_address_len = |
1da177e4 LT |
912 | (sizeof(struct sadb_address)+sockaddr_size)/ |
913 | sizeof(uint64_t); | |
914 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
915 | addr->sadb_address_proto = | |
916 | pfkey_proto_from_xfrm(x->sel.proto); | |
917 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
918 | addr->sadb_address_reserved = 0; | |
919 | ||
920 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
921 | sin6->sin6_family = AF_INET6; | |
922 | sin6->sin6_port = x->sel.sport; | |
923 | sin6->sin6_flowinfo = 0; | |
924 | memcpy(&sin6->sin6_addr, x->sel.saddr.a6, | |
925 | sizeof(struct in6_addr)); | |
926 | sin6->sin6_scope_id = 0; | |
927 | } | |
928 | } | |
929 | #endif | |
930 | else | |
931 | BUG(); | |
932 | ||
933 | /* auth key */ | |
934 | if (add_keys && auth_key_size) { | |
8ff24541 | 935 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 LT |
936 | sizeof(struct sadb_key)+auth_key_size); |
937 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
938 | sizeof(uint64_t); | |
939 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
940 | key->sadb_key_bits = x->aalg->alg_key_len; | |
941 | key->sadb_key_reserved = 0; | |
942 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
943 | } | |
944 | /* encrypt key */ | |
945 | if (add_keys && encrypt_key_size) { | |
8ff24541 | 946 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 | 947 | sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541 | 948 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
949 | encrypt_key_size) / sizeof(uint64_t); |
950 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
951 | key->sadb_key_bits = x->ealg->alg_key_len; | |
952 | key->sadb_key_reserved = 0; | |
8ff24541 | 953 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
954 | (x->ealg->alg_key_len+7)/8); |
955 | } | |
956 | ||
957 | /* sa */ | |
958 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
959 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
960 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
961 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
962 | kfree_skb(skb); | |
963 | return ERR_PTR(-EINVAL); | |
964 | } | |
965 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
966 | sa2->sadb_x_sa2_reserved1 = 0; |
967 | sa2->sadb_x_sa2_reserved2 = 0; | |
968 | sa2->sadb_x_sa2_sequence = 0; | |
969 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
970 | ||
971 | if (natt && natt->encap_type) { | |
972 | struct sadb_x_nat_t_type *n_type; | |
973 | struct sadb_x_nat_t_port *n_port; | |
974 | ||
975 | /* type */ | |
976 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
977 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
978 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
979 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
980 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
981 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
982 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
983 | ||
984 | /* source port */ | |
985 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
986 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
987 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
988 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
989 | n_port->sadb_x_nat_t_port_reserved = 0; | |
990 | ||
991 | /* dest port */ | |
992 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
993 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
994 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
995 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
996 | n_port->sadb_x_nat_t_port_reserved = 0; | |
997 | } | |
998 | ||
df71837d TJ |
999 | /* security context */ |
1000 | if (xfrm_ctx) { | |
1001 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
1002 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
1003 | sec_ctx->sadb_x_sec_len = | |
1004 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1005 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1006 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1007 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1008 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1009 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1010 | xfrm_ctx->ctx_len); | |
1011 | } | |
1012 | ||
1da177e4 LT |
1013 | return skb; |
1014 | } | |
1015 | ||
8ff24541 | 1016 | static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, |
1da177e4 LT |
1017 | void **ext_hdrs) |
1018 | { | |
8ff24541 | 1019 | struct xfrm_state *x; |
1da177e4 LT |
1020 | struct sadb_lifetime *lifetime; |
1021 | struct sadb_sa *sa; | |
1022 | struct sadb_key *key; | |
df71837d | 1023 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
1024 | uint16_t proto; |
1025 | int err; | |
8ff24541 | 1026 | |
1da177e4 LT |
1027 | |
1028 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
1029 | if (!sa || | |
1030 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1031 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1032 | return ERR_PTR(-EINVAL); | |
1033 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1034 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1035 | return ERR_PTR(-EINVAL); | |
1036 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1037 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1038 | return ERR_PTR(-EINVAL); | |
1039 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1040 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1041 | return ERR_PTR(-EINVAL); | |
1042 | ||
1043 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1044 | if (proto == 0) | |
1045 | return ERR_PTR(-EINVAL); | |
1046 | ||
1047 | /* default error is no buffer space */ | |
1048 | err = -ENOBUFS; | |
1049 | ||
1050 | /* RFC2367: | |
1051 | ||
1052 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1053 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1054 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1055 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1056 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1057 | not true. | |
1058 | ||
8ff24541 | 1059 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1060 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1061 | */ | |
1062 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1063 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1064 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1065 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1066 | return ERR_PTR(-EINVAL); | |
1067 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | |
1068 | if (key != NULL && | |
1069 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1070 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1071 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1072 | return ERR_PTR(-EINVAL); | |
1073 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1074 | if (key != NULL && | |
1075 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1076 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1077 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1078 | return ERR_PTR(-EINVAL); | |
1079 | ||
1080 | x = xfrm_state_alloc(); | |
1081 | if (x == NULL) | |
1082 | return ERR_PTR(-ENOBUFS); | |
1083 | ||
1084 | x->id.proto = proto; | |
1085 | x->id.spi = sa->sadb_sa_spi; | |
1086 | x->props.replay_window = sa->sadb_sa_replay; | |
1087 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | |
1088 | x->props.flags |= XFRM_STATE_NOECN; | |
1089 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1090 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1091 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1092 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 LT |
1093 | |
1094 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; | |
1095 | if (lifetime != NULL) { | |
1096 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1097 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1098 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1099 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1100 | } | |
1101 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; | |
1102 | if (lifetime != NULL) { | |
1103 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1104 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1105 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1106 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1107 | } | |
df71837d TJ |
1108 | |
1109 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; | |
1110 | if (sec_ctx != NULL) { | |
1111 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
1112 | ||
1113 | if (!uctx) | |
1114 | goto out; | |
1115 | ||
1116 | err = security_xfrm_state_alloc(x, uctx); | |
1117 | kfree(uctx); | |
1118 | ||
1119 | if (err) | |
1120 | goto out; | |
1121 | } | |
1122 | ||
1da177e4 LT |
1123 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1124 | if (sa->sadb_sa_auth) { | |
1125 | int keysize = 0; | |
1126 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
1127 | if (!a) { | |
1128 | err = -ENOSYS; | |
1129 | goto out; | |
1130 | } | |
1131 | if (key) | |
1132 | keysize = (key->sadb_key_bits + 7) / 8; | |
1133 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1134 | if (!x->aalg) | |
1135 | goto out; | |
1136 | strcpy(x->aalg->alg_name, a->name); | |
1137 | x->aalg->alg_key_len = 0; | |
1138 | if (key) { | |
1139 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1140 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1141 | } | |
1142 | x->props.aalgo = sa->sadb_sa_auth; | |
1143 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1144 | } | |
1145 | if (sa->sadb_sa_encrypt) { | |
1146 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1147 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
1148 | if (!a) { | |
1149 | err = -ENOSYS; | |
1150 | goto out; | |
1151 | } | |
1152 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1153 | if (!x->calg) | |
1154 | goto out; | |
1155 | strcpy(x->calg->alg_name, a->name); | |
1156 | x->props.calgo = sa->sadb_sa_encrypt; | |
1157 | } else { | |
1158 | int keysize = 0; | |
1159 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
1160 | if (!a) { | |
1161 | err = -ENOSYS; | |
1162 | goto out; | |
1163 | } | |
1164 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1165 | if (key) | |
1166 | keysize = (key->sadb_key_bits + 7) / 8; | |
1167 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1168 | if (!x->ealg) | |
1169 | goto out; | |
1170 | strcpy(x->ealg->alg_name, a->name); | |
1171 | x->ealg->alg_key_len = 0; | |
1172 | if (key) { | |
1173 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1174 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1175 | } | |
1176 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1177 | } | |
1178 | } | |
1179 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1180 | ||
8ff24541 | 1181 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
1182 | &x->props.saddr); |
1183 | if (!x->props.family) { | |
1184 | err = -EAFNOSUPPORT; | |
1185 | goto out; | |
1186 | } | |
8ff24541 | 1187 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1188 | &x->id.daddr); |
1189 | ||
1190 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
1191 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; | |
55569ce2 KM |
1192 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1193 | if (mode < 0) { | |
1194 | err = -EINVAL; | |
1195 | goto out; | |
1196 | } | |
1197 | x->props.mode = mode; | |
1da177e4 LT |
1198 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1199 | } | |
1200 | ||
1201 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
1202 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; | |
1203 | ||
1204 | /* Nobody uses this, but we try. */ | |
1205 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1206 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1207 | } | |
1208 | ||
1209 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { | |
1210 | struct sadb_x_nat_t_type* n_type; | |
1211 | struct xfrm_encap_tmpl *natt; | |
1212 | ||
1213 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1214 | if (!x->encap) | |
1215 | goto out; | |
1216 | ||
1217 | natt = x->encap; | |
1218 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1219 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1220 | ||
1221 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
1222 | struct sadb_x_nat_t_port* n_port = | |
1223 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; | |
1224 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1225 | } | |
1226 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
1227 | struct sadb_x_nat_t_port* n_port = | |
1228 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; | |
1229 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1230 | } | |
1231 | } | |
1232 | ||
72cb6962 HX |
1233 | err = xfrm_init_state(x); |
1234 | if (err) | |
1da177e4 | 1235 | goto out; |
72cb6962 | 1236 | |
1da177e4 | 1237 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1238 | return x; |
1239 | ||
1240 | out: | |
1241 | x->km.state = XFRM_STATE_DEAD; | |
1242 | xfrm_state_put(x); | |
1243 | return ERR_PTR(err); | |
1244 | } | |
1245 | ||
1246 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1247 | { | |
1248 | return -EOPNOTSUPP; | |
1249 | } | |
1250 | ||
1251 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1252 | { | |
1253 | struct sk_buff *resp_skb; | |
1254 | struct sadb_x_sa2 *sa2; | |
1255 | struct sadb_address *saddr, *daddr; | |
1256 | struct sadb_msg *out_hdr; | |
1257 | struct xfrm_state *x = NULL; | |
55569ce2 | 1258 | int mode; |
1da177e4 LT |
1259 | u32 reqid; |
1260 | u8 proto; | |
1261 | unsigned short family; | |
1262 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1263 | ||
1264 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1265 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1266 | return -EINVAL; | |
1267 | ||
1268 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1269 | if (proto == 0) | |
1270 | return -EINVAL; | |
1271 | ||
1272 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1273 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1274 | if (mode < 0) | |
1275 | return -EINVAL; | |
1da177e4 LT |
1276 | reqid = sa2->sadb_x_sa2_reqid; |
1277 | } else { | |
1278 | mode = 0; | |
1279 | reqid = 0; | |
1280 | } | |
1281 | ||
1282 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1283 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1284 | ||
1285 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1286 | switch (family) { | |
1287 | case AF_INET: | |
1288 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1289 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1290 | break; | |
1291 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1292 | case AF_INET6: | |
1293 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1294 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1295 | break; | |
1296 | #endif | |
1297 | } | |
1298 | ||
1299 | if (hdr->sadb_msg_seq) { | |
1300 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1301 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { | |
1302 | xfrm_state_put(x); | |
1303 | x = NULL; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | if (!x) | |
1308 | x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); | |
1309 | ||
1310 | if (x == NULL) | |
1311 | return -ENOENT; | |
1312 | ||
1313 | resp_skb = ERR_PTR(-ENOENT); | |
1314 | ||
1315 | spin_lock_bh(&x->lock); | |
1316 | if (x->km.state != XFRM_STATE_DEAD) { | |
1317 | struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1]; | |
1318 | u32 min_spi, max_spi; | |
1319 | ||
1320 | if (range != NULL) { | |
1321 | min_spi = range->sadb_spirange_min; | |
1322 | max_spi = range->sadb_spirange_max; | |
1323 | } else { | |
1324 | min_spi = 0x100; | |
1325 | max_spi = 0x0fffffff; | |
1326 | } | |
1327 | xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi)); | |
1328 | if (x->id.spi) | |
1329 | resp_skb = pfkey_xfrm_state2msg(x, 0, 3); | |
1330 | } | |
1331 | spin_unlock_bh(&x->lock); | |
1332 | ||
1333 | if (IS_ERR(resp_skb)) { | |
1334 | xfrm_state_put(x); | |
1335 | return PTR_ERR(resp_skb); | |
1336 | } | |
1337 | ||
1338 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1339 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1340 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1341 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1342 | out_hdr->sadb_msg_errno = 0; | |
1343 | out_hdr->sadb_msg_reserved = 0; | |
1344 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1345 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1346 | ||
1347 | xfrm_state_put(x); | |
1348 | ||
1349 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1355 | { | |
1356 | struct xfrm_state *x; | |
1357 | ||
1358 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1359 | return -EOPNOTSUPP; | |
1360 | ||
1361 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1362 | return 0; | |
1363 | ||
1364 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1365 | if (x == NULL) | |
1366 | return 0; | |
1367 | ||
1368 | spin_lock_bh(&x->lock); | |
1369 | if (x->km.state == XFRM_STATE_ACQ) { | |
1370 | x->km.state = XFRM_STATE_ERROR; | |
1371 | wake_up(&km_waitq); | |
1372 | } | |
1373 | spin_unlock_bh(&x->lock); | |
1374 | xfrm_state_put(x); | |
1375 | return 0; | |
1376 | } | |
1377 | ||
26b15dad JHS |
1378 | static inline int event2poltype(int event) |
1379 | { | |
1380 | switch (event) { | |
f60f6b8f | 1381 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1382 | return SADB_X_SPDDELETE; |
f60f6b8f | 1383 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1384 | return SADB_X_SPDADD; |
f60f6b8f | 1385 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1386 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1387 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1388 | // return SADB_X_SPDEXPIRE; |
1389 | default: | |
1390 | printk("pfkey: Unknown policy event %d\n", event); | |
1391 | break; | |
1392 | } | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | static inline int event2keytype(int event) | |
1398 | { | |
1399 | switch (event) { | |
f60f6b8f | 1400 | case XFRM_MSG_DELSA: |
26b15dad | 1401 | return SADB_DELETE; |
f60f6b8f | 1402 | case XFRM_MSG_NEWSA: |
26b15dad | 1403 | return SADB_ADD; |
f60f6b8f | 1404 | case XFRM_MSG_UPDSA: |
26b15dad | 1405 | return SADB_UPDATE; |
f60f6b8f | 1406 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1407 | return SADB_EXPIRE; |
1408 | default: | |
1409 | printk("pfkey: Unknown SA event %d\n", event); | |
1410 | break; | |
1411 | } | |
1412 | ||
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | /* ADD/UPD/DEL */ | |
1417 | static int key_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1418 | { | |
1419 | struct sk_buff *skb; | |
1420 | struct sadb_msg *hdr; | |
1421 | int hsc = 3; | |
1422 | ||
f60f6b8f | 1423 | if (c->event == XFRM_MSG_DELSA) |
26b15dad JHS |
1424 | hsc = 0; |
1425 | ||
26b15dad JHS |
1426 | skb = pfkey_xfrm_state2msg(x, 0, hsc); |
1427 | ||
1428 | if (IS_ERR(skb)) | |
1429 | return PTR_ERR(skb); | |
1430 | ||
1431 | hdr = (struct sadb_msg *) skb->data; | |
1432 | hdr->sadb_msg_version = PF_KEY_V2; | |
1433 | hdr->sadb_msg_type = event2keytype(c->event); | |
1434 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1435 | hdr->sadb_msg_errno = 0; | |
1436 | hdr->sadb_msg_reserved = 0; | |
1437 | hdr->sadb_msg_seq = c->seq; | |
1438 | hdr->sadb_msg_pid = c->pid; | |
1439 | ||
1440 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1da177e4 LT |
1444 | |
1445 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1446 | { | |
1da177e4 LT |
1447 | struct xfrm_state *x; |
1448 | int err; | |
26b15dad | 1449 | struct km_event c; |
1da177e4 LT |
1450 | |
1451 | xfrm_probe_algs(); | |
8ff24541 | 1452 | |
1da177e4 LT |
1453 | x = pfkey_msg2xfrm_state(hdr, ext_hdrs); |
1454 | if (IS_ERR(x)) | |
1455 | return PTR_ERR(x); | |
1456 | ||
26b15dad | 1457 | xfrm_state_hold(x); |
1da177e4 LT |
1458 | if (hdr->sadb_msg_type == SADB_ADD) |
1459 | err = xfrm_state_add(x); | |
1460 | else | |
1461 | err = xfrm_state_update(x); | |
1462 | ||
161a09e7 JL |
1463 | xfrm_audit_log(audit_get_loginuid(current->audit_context), 0, |
1464 | AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x); | |
1465 | ||
1da177e4 LT |
1466 | if (err < 0) { |
1467 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1468 | __xfrm_state_put(x); |
7d6dfe1f | 1469 | goto out; |
1da177e4 LT |
1470 | } |
1471 | ||
26b15dad | 1472 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1473 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1474 | else |
f60f6b8f | 1475 | c.event = XFRM_MSG_UPDSA; |
26b15dad JHS |
1476 | c.seq = hdr->sadb_msg_seq; |
1477 | c.pid = hdr->sadb_msg_pid; | |
1478 | km_state_notify(x, &c); | |
7d6dfe1f | 1479 | out: |
26b15dad | 1480 | xfrm_state_put(x); |
26b15dad | 1481 | return err; |
1da177e4 LT |
1482 | } |
1483 | ||
1484 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1485 | { | |
1486 | struct xfrm_state *x; | |
26b15dad JHS |
1487 | struct km_event c; |
1488 | int err; | |
1da177e4 LT |
1489 | |
1490 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1491 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1492 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1493 | return -EINVAL; | |
1494 | ||
1495 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1496 | if (x == NULL) | |
1497 | return -ESRCH; | |
1498 | ||
c8c05a8e CZ |
1499 | if ((err = security_xfrm_state_delete(x))) |
1500 | goto out; | |
1501 | ||
1da177e4 | 1502 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1503 | err = -EPERM; |
1504 | goto out; | |
1da177e4 | 1505 | } |
161a09e7 | 1506 | |
26b15dad | 1507 | err = xfrm_state_delete(x); |
161a09e7 | 1508 | |
c8c05a8e CZ |
1509 | if (err < 0) |
1510 | goto out; | |
1da177e4 | 1511 | |
26b15dad JHS |
1512 | c.seq = hdr->sadb_msg_seq; |
1513 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1514 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1515 | km_state_notify(x, &c); |
c8c05a8e | 1516 | out: |
16bec31d EP |
1517 | xfrm_audit_log(audit_get_loginuid(current->audit_context), 0, |
1518 | AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x); | |
26b15dad | 1519 | xfrm_state_put(x); |
1da177e4 | 1520 | |
26b15dad | 1521 | return err; |
1da177e4 LT |
1522 | } |
1523 | ||
1524 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1525 | { | |
1526 | __u8 proto; | |
1527 | struct sk_buff *out_skb; | |
1528 | struct sadb_msg *out_hdr; | |
1529 | struct xfrm_state *x; | |
1530 | ||
1531 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1532 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1533 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1534 | return -EINVAL; | |
1535 | ||
1536 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1537 | if (x == NULL) | |
1538 | return -ESRCH; | |
1539 | ||
1540 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | |
1541 | proto = x->id.proto; | |
1542 | xfrm_state_put(x); | |
1543 | if (IS_ERR(out_skb)) | |
1544 | return PTR_ERR(out_skb); | |
1545 | ||
1546 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1547 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1548 | out_hdr->sadb_msg_type = SADB_DUMP; | |
1549 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1550 | out_hdr->sadb_msg_errno = 0; | |
1551 | out_hdr->sadb_msg_reserved = 0; | |
1552 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1553 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1554 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); | |
1555 | ||
1556 | return 0; | |
1557 | } | |
1558 | ||
00fa0233 | 1559 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, |
dd0fc66f | 1560 | gfp_t allocation) |
1da177e4 LT |
1561 | { |
1562 | struct sk_buff *skb; | |
1563 | struct sadb_msg *hdr; | |
1564 | int len, auth_len, enc_len, i; | |
1565 | ||
1566 | auth_len = xfrm_count_auth_supported(); | |
1567 | if (auth_len) { | |
1568 | auth_len *= sizeof(struct sadb_alg); | |
1569 | auth_len += sizeof(struct sadb_supported); | |
1570 | } | |
8ff24541 | 1571 | |
1da177e4 LT |
1572 | enc_len = xfrm_count_enc_supported(); |
1573 | if (enc_len) { | |
1574 | enc_len *= sizeof(struct sadb_alg); | |
1575 | enc_len += sizeof(struct sadb_supported); | |
1576 | } | |
8ff24541 | 1577 | |
1da177e4 LT |
1578 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1579 | ||
1580 | skb = alloc_skb(len + 16, allocation); | |
1581 | if (!skb) | |
1582 | goto out_put_algs; | |
1583 | ||
1584 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1585 | pfkey_hdr_dup(hdr, orig); | |
1586 | hdr->sadb_msg_errno = 0; | |
1587 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1588 | ||
1589 | if (auth_len) { | |
1590 | struct sadb_supported *sp; | |
1591 | struct sadb_alg *ap; | |
1592 | ||
1593 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1594 | ap = (struct sadb_alg *) (sp + 1); | |
1595 | ||
1596 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1597 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1598 | ||
1599 | for (i = 0; ; i++) { | |
1600 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1601 | if (!aalg) | |
1602 | break; | |
1603 | if (aalg->available) | |
1604 | *ap++ = aalg->desc; | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | if (enc_len) { | |
1609 | struct sadb_supported *sp; | |
1610 | struct sadb_alg *ap; | |
1611 | ||
1612 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1613 | ap = (struct sadb_alg *) (sp + 1); | |
1614 | ||
1615 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1616 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1617 | ||
1618 | for (i = 0; ; i++) { | |
1619 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1620 | if (!ealg) | |
1621 | break; | |
1622 | if (ealg->available) | |
1623 | *ap++ = ealg->desc; | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | out_put_algs: | |
1628 | return skb; | |
1629 | } | |
1630 | ||
1631 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1632 | { | |
1633 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1634 | struct sk_buff *supp_skb; | |
1635 | ||
1636 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1637 | return -EINVAL; | |
1638 | ||
1639 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1640 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1641 | return -EEXIST; | |
1642 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1643 | } | |
1644 | ||
1645 | xfrm_probe_algs(); | |
8ff24541 | 1646 | |
1da177e4 LT |
1647 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1648 | if (!supp_skb) { | |
1649 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1650 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1651 | ||
1652 | return -ENOBUFS; | |
1653 | } | |
1654 | ||
1655 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); | |
1656 | ||
1657 | return 0; | |
1658 | } | |
1659 | ||
26b15dad JHS |
1660 | static int key_notify_sa_flush(struct km_event *c) |
1661 | { | |
1662 | struct sk_buff *skb; | |
1663 | struct sadb_msg *hdr; | |
1664 | ||
1665 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1666 | if (!skb) | |
1667 | return -ENOBUFS; | |
1668 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1669 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1670 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad JHS |
1671 | hdr->sadb_msg_seq = c->seq; |
1672 | hdr->sadb_msg_pid = c->pid; | |
1673 | hdr->sadb_msg_version = PF_KEY_V2; | |
1674 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1675 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1676 | ||
1677 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1678 | ||
1679 | return 0; | |
1680 | } | |
1681 | ||
1da177e4 LT |
1682 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1683 | { | |
1684 | unsigned proto; | |
26b15dad | 1685 | struct km_event c; |
161a09e7 | 1686 | struct xfrm_audit audit_info; |
1da177e4 LT |
1687 | |
1688 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1689 | if (proto == 0) | |
1690 | return -EINVAL; | |
1691 | ||
161a09e7 JL |
1692 | audit_info.loginuid = audit_get_loginuid(current->audit_context); |
1693 | audit_info.secid = 0; | |
1694 | xfrm_state_flush(proto, &audit_info); | |
bf08867f | 1695 | c.data.proto = proto; |
26b15dad JHS |
1696 | c.seq = hdr->sadb_msg_seq; |
1697 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1698 | c.event = XFRM_MSG_FLUSHSA; |
26b15dad | 1699 | km_state_notify(NULL, &c); |
1da177e4 LT |
1700 | |
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | struct pfkey_dump_data | |
1705 | { | |
1706 | struct sk_buff *skb; | |
1707 | struct sadb_msg *hdr; | |
1708 | struct sock *sk; | |
1709 | }; | |
1710 | ||
1711 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) | |
1712 | { | |
1713 | struct pfkey_dump_data *data = ptr; | |
1714 | struct sk_buff *out_skb; | |
1715 | struct sadb_msg *out_hdr; | |
1716 | ||
1717 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | |
1718 | if (IS_ERR(out_skb)) | |
1719 | return PTR_ERR(out_skb); | |
1720 | ||
1721 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1722 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | |
1723 | out_hdr->sadb_msg_type = SADB_DUMP; | |
1724 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1725 | out_hdr->sadb_msg_errno = 0; | |
1726 | out_hdr->sadb_msg_reserved = 0; | |
1727 | out_hdr->sadb_msg_seq = count; | |
1728 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | |
1729 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | |
1730 | return 0; | |
1731 | } | |
1732 | ||
1733 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1734 | { | |
1735 | u8 proto; | |
1736 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | |
1737 | ||
1738 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1739 | if (proto == 0) | |
1740 | return -EINVAL; | |
1741 | ||
1742 | return xfrm_state_walk(proto, dump_sa, &data); | |
1743 | } | |
1744 | ||
1745 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1746 | { | |
1747 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1748 | int satype = hdr->sadb_msg_satype; | |
1749 | ||
1750 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
1751 | /* XXX we mangle packet... */ | |
1752 | hdr->sadb_msg_errno = 0; | |
1753 | if (satype != 0 && satype != 1) | |
1754 | return -EINVAL; | |
1755 | pfk->promisc = satype; | |
1756 | } | |
1757 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); | |
1758 | return 0; | |
1759 | } | |
1760 | ||
1761 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1762 | { | |
1763 | int i; | |
1764 | u32 reqid = *(u32*)ptr; | |
1765 | ||
1766 | for (i=0; i<xp->xfrm_nr; i++) { | |
1767 | if (xp->xfrm_vec[i].reqid == reqid) | |
1768 | return -EEXIST; | |
1769 | } | |
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | static u32 gen_reqid(void) | |
1774 | { | |
1775 | u32 start; | |
1776 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; | |
1777 | ||
1778 | start = reqid; | |
1779 | do { | |
1780 | ++reqid; | |
1781 | if (reqid == 0) | |
1782 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
f7b6983f MN |
1783 | if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid, |
1784 | (void*)&reqid) != -EEXIST) | |
1da177e4 LT |
1785 | return reqid; |
1786 | } while (reqid != start); | |
1787 | return 0; | |
1788 | } | |
1789 | ||
1790 | static int | |
1791 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1792 | { | |
1793 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; | |
1794 | struct sockaddr_in *sin; | |
1795 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1796 | struct sockaddr_in6 *sin6; | |
1797 | #endif | |
55569ce2 | 1798 | int mode; |
1da177e4 LT |
1799 | |
1800 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1801 | return -ELOOP; | |
1802 | ||
1803 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1804 | return -EINVAL; | |
1805 | ||
1806 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1807 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1808 | return -EINVAL; | |
1809 | t->mode = mode; | |
1da177e4 LT |
1810 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1811 | t->optional = 1; | |
1812 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1813 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1814 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1815 | t->reqid = 0; | |
1816 | if (!t->reqid && !(t->reqid = gen_reqid())) | |
1817 | return -ENOBUFS; | |
1818 | } | |
1819 | ||
1820 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1821 | if (t->mode == XFRM_MODE_TUNNEL) { |
2718aa7c MK |
1822 | struct sockaddr *sa; |
1823 | sa = (struct sockaddr *)(rq+1); | |
1824 | switch(sa->sa_family) { | |
1da177e4 | 1825 | case AF_INET: |
2718aa7c | 1826 | sin = (struct sockaddr_in*)sa; |
1da177e4 LT |
1827 | t->saddr.a4 = sin->sin_addr.s_addr; |
1828 | sin++; | |
1829 | if (sin->sin_family != AF_INET) | |
1830 | return -EINVAL; | |
1831 | t->id.daddr.a4 = sin->sin_addr.s_addr; | |
1832 | break; | |
1833 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1834 | case AF_INET6: | |
2718aa7c | 1835 | sin6 = (struct sockaddr_in6*)sa; |
1da177e4 LT |
1836 | memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); |
1837 | sin6++; | |
1838 | if (sin6->sin6_family != AF_INET6) | |
1839 | return -EINVAL; | |
1840 | memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); | |
1841 | break; | |
1842 | #endif | |
1843 | default: | |
1844 | return -EINVAL; | |
1845 | } | |
2718aa7c MK |
1846 | t->encap_family = sa->sa_family; |
1847 | } else | |
1848 | t->encap_family = xp->family; | |
1849 | ||
1da177e4 LT |
1850 | /* No way to set this via kame pfkey */ |
1851 | t->aalgos = t->ealgos = t->calgos = ~0; | |
1852 | xp->xfrm_nr++; | |
1853 | return 0; | |
1854 | } | |
1855 | ||
1856 | static int | |
1857 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1858 | { | |
1859 | int err; | |
1860 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1861 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1862 | ||
1863 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | |
1864 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1865 | return err; | |
1866 | len -= rq->sadb_x_ipsecrequest_len; | |
1867 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1868 | } | |
1869 | return 0; | |
1870 | } | |
1871 | ||
df71837d TJ |
1872 | static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) |
1873 | { | |
1874 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1875 | ||
1876 | if (xfrm_ctx) { | |
1877 | int len = sizeof(struct sadb_x_sec_ctx); | |
1878 | len += xfrm_ctx->ctx_len; | |
1879 | return PFKEY_ALIGN8(len); | |
1880 | } | |
1881 | return 0; | |
1882 | } | |
1883 | ||
1da177e4 LT |
1884 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) |
1885 | { | |
2718aa7c | 1886 | struct xfrm_tmpl *t; |
1da177e4 | 1887 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
1888 | int socklen = 0; |
1889 | int i; | |
1890 | ||
1891 | for (i=0; i<xp->xfrm_nr; i++) { | |
1892 | t = xp->xfrm_vec + i; | |
1893 | socklen += (t->encap_family == AF_INET ? | |
1894 | sizeof(struct sockaddr_in) : | |
1895 | sizeof(struct sockaddr_in6)); | |
1896 | } | |
1da177e4 LT |
1897 | |
1898 | return sizeof(struct sadb_msg) + | |
1899 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 1900 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
1901 | (sockaddr_size * 2) + |
1902 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
1903 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1904 | (socklen * 2) + | |
df71837d | 1905 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
1906 | } |
1907 | ||
1908 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) | |
1909 | { | |
1910 | struct sk_buff *skb; | |
1911 | int size; | |
1912 | ||
1913 | size = pfkey_xfrm_policy2msg_size(xp); | |
1914 | ||
1915 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
1916 | if (skb == NULL) | |
1917 | return ERR_PTR(-ENOBUFS); | |
1918 | ||
1919 | return skb; | |
1920 | } | |
1921 | ||
55569ce2 | 1922 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) |
1da177e4 LT |
1923 | { |
1924 | struct sadb_msg *hdr; | |
1925 | struct sadb_address *addr; | |
1926 | struct sadb_lifetime *lifetime; | |
1927 | struct sadb_x_policy *pol; | |
1928 | struct sockaddr_in *sin; | |
df71837d TJ |
1929 | struct sadb_x_sec_ctx *sec_ctx; |
1930 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
1931 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1932 | struct sockaddr_in6 *sin6; | |
1933 | #endif | |
1934 | int i; | |
1935 | int size; | |
1936 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
1937 | int socklen = (xp->family == AF_INET ? | |
1938 | sizeof(struct sockaddr_in) : | |
1939 | sizeof(struct sockaddr_in6)); | |
1940 | ||
1941 | size = pfkey_xfrm_policy2msg_size(xp); | |
1942 | ||
1943 | /* call should fill header later */ | |
1944 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
1945 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
1946 | ||
1947 | /* src address */ | |
8ff24541 | 1948 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 1949 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 1950 | addr->sadb_address_len = |
1da177e4 LT |
1951 | (sizeof(struct sadb_address)+sockaddr_size)/ |
1952 | sizeof(uint64_t); | |
1953 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
1954 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
1955 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
1956 | addr->sadb_address_reserved = 0; | |
1957 | /* src address */ | |
1958 | if (xp->family == AF_INET) { | |
1959 | sin = (struct sockaddr_in *) (addr + 1); | |
1960 | sin->sin_family = AF_INET; | |
1961 | sin->sin_addr.s_addr = xp->selector.saddr.a4; | |
1962 | sin->sin_port = xp->selector.sport; | |
1963 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
1964 | } | |
1965 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1966 | else if (xp->family == AF_INET6) { | |
1967 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
1968 | sin6->sin6_family = AF_INET6; | |
1969 | sin6->sin6_port = xp->selector.sport; | |
1970 | sin6->sin6_flowinfo = 0; | |
1971 | memcpy(&sin6->sin6_addr, xp->selector.saddr.a6, | |
1972 | sizeof(struct in6_addr)); | |
1973 | sin6->sin6_scope_id = 0; | |
1974 | } | |
1975 | #endif | |
1976 | else | |
1977 | BUG(); | |
1978 | ||
1979 | /* dst address */ | |
8ff24541 | 1980 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
1981 | sizeof(struct sadb_address)+sockaddr_size); |
1982 | addr->sadb_address_len = | |
1983 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
1984 | sizeof(uint64_t); | |
1985 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
1986 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 1987 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 LT |
1988 | addr->sadb_address_reserved = 0; |
1989 | if (xp->family == AF_INET) { | |
1990 | sin = (struct sockaddr_in *) (addr + 1); | |
1991 | sin->sin_family = AF_INET; | |
1992 | sin->sin_addr.s_addr = xp->selector.daddr.a4; | |
1993 | sin->sin_port = xp->selector.dport; | |
1994 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
1995 | } | |
1996 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1997 | else if (xp->family == AF_INET6) { | |
1998 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
1999 | sin6->sin6_family = AF_INET6; | |
2000 | sin6->sin6_port = xp->selector.dport; | |
2001 | sin6->sin6_flowinfo = 0; | |
2002 | memcpy(&sin6->sin6_addr, xp->selector.daddr.a6, | |
2003 | sizeof(struct in6_addr)); | |
2004 | sin6->sin6_scope_id = 0; | |
2005 | } | |
2006 | #endif | |
2007 | else | |
2008 | BUG(); | |
2009 | ||
2010 | /* hard time */ | |
8ff24541 | 2011 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2012 | sizeof(struct sadb_lifetime)); |
2013 | lifetime->sadb_lifetime_len = | |
2014 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2015 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2016 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2017 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2018 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2019 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2020 | /* soft time */ | |
8ff24541 | 2021 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2022 | sizeof(struct sadb_lifetime)); |
2023 | lifetime->sadb_lifetime_len = | |
2024 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2025 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2026 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2027 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2028 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2029 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2030 | /* current time */ | |
8ff24541 | 2031 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2032 | sizeof(struct sadb_lifetime)); |
2033 | lifetime->sadb_lifetime_len = | |
2034 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2035 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2036 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2037 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2038 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2039 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2040 | ||
2041 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2042 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2043 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2044 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2045 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2046 | if (xp->xfrm_nr) | |
2047 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2048 | else | |
2049 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2050 | } | |
2051 | pol->sadb_x_policy_dir = dir+1; | |
2052 | pol->sadb_x_policy_id = xp->index; | |
2053 | pol->sadb_x_policy_priority = xp->priority; | |
2054 | ||
2055 | for (i=0; i<xp->xfrm_nr; i++) { | |
2056 | struct sadb_x_ipsecrequest *rq; | |
2057 | struct xfrm_tmpl *t = xp->xfrm_vec + i; | |
2058 | int req_size; | |
55569ce2 | 2059 | int mode; |
1da177e4 LT |
2060 | |
2061 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
7e49e6de | 2062 | if (t->mode == XFRM_MODE_TUNNEL) |
2718aa7c | 2063 | req_size += ((t->encap_family == AF_INET ? |
8ff24541 YH |
2064 | sizeof(struct sockaddr_in) : |
2065 | sizeof(struct sockaddr_in6)) * 2); | |
1da177e4 LT |
2066 | else |
2067 | size -= 2*socklen; | |
2068 | rq = (void*)skb_put(skb, req_size); | |
2069 | pol->sadb_x_policy_len += req_size/8; | |
2070 | memset(rq, 0, sizeof(*rq)); | |
2071 | rq->sadb_x_ipsecrequest_len = req_size; | |
2072 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2073 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2074 | return -EINVAL; | |
2075 | mode = pfkey_mode_from_xfrm(t->mode); | |
1da177e4 LT |
2076 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2077 | if (t->reqid) | |
2078 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2079 | if (t->optional) | |
2080 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2081 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
7e49e6de | 2082 | if (t->mode == XFRM_MODE_TUNNEL) { |
2718aa7c | 2083 | switch (t->encap_family) { |
1da177e4 LT |
2084 | case AF_INET: |
2085 | sin = (void*)(rq+1); | |
2086 | sin->sin_family = AF_INET; | |
2087 | sin->sin_addr.s_addr = t->saddr.a4; | |
2088 | sin->sin_port = 0; | |
2089 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2090 | sin++; | |
2091 | sin->sin_family = AF_INET; | |
2092 | sin->sin_addr.s_addr = t->id.daddr.a4; | |
2093 | sin->sin_port = 0; | |
2094 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2095 | break; | |
2096 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2097 | case AF_INET6: | |
2098 | sin6 = (void*)(rq+1); | |
2099 | sin6->sin6_family = AF_INET6; | |
2100 | sin6->sin6_port = 0; | |
2101 | sin6->sin6_flowinfo = 0; | |
2102 | memcpy(&sin6->sin6_addr, t->saddr.a6, | |
2103 | sizeof(struct in6_addr)); | |
2104 | sin6->sin6_scope_id = 0; | |
2105 | ||
2106 | sin6++; | |
2107 | sin6->sin6_family = AF_INET6; | |
2108 | sin6->sin6_port = 0; | |
2109 | sin6->sin6_flowinfo = 0; | |
2110 | memcpy(&sin6->sin6_addr, t->id.daddr.a6, | |
2111 | sizeof(struct in6_addr)); | |
2112 | sin6->sin6_scope_id = 0; | |
2113 | break; | |
2114 | #endif | |
2115 | default: | |
2116 | break; | |
2117 | } | |
2118 | } | |
2119 | } | |
df71837d TJ |
2120 | |
2121 | /* security context */ | |
2122 | if ((xfrm_ctx = xp->security)) { | |
2123 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2124 | ||
2125 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2126 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2127 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2128 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2129 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2130 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2131 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2132 | xfrm_ctx->ctx_len); | |
2133 | } | |
2134 | ||
1da177e4 LT |
2135 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2136 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
55569ce2 KM |
2137 | |
2138 | return 0; | |
1da177e4 LT |
2139 | } |
2140 | ||
26b15dad JHS |
2141 | static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2142 | { | |
2143 | struct sk_buff *out_skb; | |
2144 | struct sadb_msg *out_hdr; | |
2145 | int err; | |
2146 | ||
2147 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2148 | if (IS_ERR(out_skb)) { | |
2149 | err = PTR_ERR(out_skb); | |
2150 | goto out; | |
2151 | } | |
55569ce2 KM |
2152 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2153 | if (err < 0) | |
2154 | return err; | |
26b15dad JHS |
2155 | |
2156 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2157 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2158 | ||
f60f6b8f | 2159 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2160 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2161 | else | |
2162 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2163 | out_hdr->sadb_msg_errno = 0; | |
2164 | out_hdr->sadb_msg_seq = c->seq; | |
2165 | out_hdr->sadb_msg_pid = c->pid; | |
2166 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2167 | out: | |
2168 | return 0; | |
2169 | ||
2170 | } | |
2171 | ||
1da177e4 LT |
2172 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2173 | { | |
df71837d | 2174 | int err = 0; |
1da177e4 LT |
2175 | struct sadb_lifetime *lifetime; |
2176 | struct sadb_address *sa; | |
2177 | struct sadb_x_policy *pol; | |
2178 | struct xfrm_policy *xp; | |
26b15dad | 2179 | struct km_event c; |
df71837d | 2180 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2181 | |
2182 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2183 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2184 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2188 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2189 | return -EINVAL; | |
2190 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2191 | return -EINVAL; | |
2192 | ||
2193 | xp = xfrm_policy_alloc(GFP_KERNEL); | |
2194 | if (xp == NULL) | |
2195 | return -ENOBUFS; | |
2196 | ||
2197 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2198 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2199 | xp->priority = pol->sadb_x_policy_priority; | |
2200 | ||
8ff24541 | 2201 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2202 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
2203 | if (!xp->family) { | |
2204 | err = -EINVAL; | |
2205 | goto out; | |
2206 | } | |
2207 | xp->selector.family = xp->family; | |
2208 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2209 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2210 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2211 | if (xp->selector.sport) | |
8f83f23e | 2212 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2213 | |
8ff24541 | 2214 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2215 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2216 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2217 | ||
2218 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2219 | * in both addresses. | |
2220 | */ | |
2221 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2222 | ||
2223 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2224 | if (xp->selector.dport) | |
8f83f23e | 2225 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2226 | |
df71837d TJ |
2227 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2228 | if (sec_ctx != NULL) { | |
2229 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2230 | ||
2231 | if (!uctx) { | |
2232 | err = -ENOBUFS; | |
2233 | goto out; | |
2234 | } | |
2235 | ||
2236 | err = security_xfrm_policy_alloc(xp, uctx); | |
2237 | kfree(uctx); | |
2238 | ||
2239 | if (err) | |
2240 | goto out; | |
2241 | } | |
2242 | ||
1da177e4 LT |
2243 | xp->lft.soft_byte_limit = XFRM_INF; |
2244 | xp->lft.hard_byte_limit = XFRM_INF; | |
2245 | xp->lft.soft_packet_limit = XFRM_INF; | |
2246 | xp->lft.hard_packet_limit = XFRM_INF; | |
2247 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2248 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2249 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2250 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2251 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2252 | } | |
2253 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2254 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2255 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2256 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2257 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2258 | } | |
2259 | xp->xfrm_nr = 0; | |
2260 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2261 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2262 | goto out; | |
2263 | ||
1da177e4 LT |
2264 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2265 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2266 | |
161a09e7 JL |
2267 | xfrm_audit_log(audit_get_loginuid(current->audit_context), 0, |
2268 | AUDIT_MAC_IPSEC_ADDSPD, err ? 0 : 1, xp, NULL); | |
2269 | ||
df71837d TJ |
2270 | if (err) |
2271 | goto out; | |
1da177e4 | 2272 | |
26b15dad | 2273 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2274 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2275 | else |
f60f6b8f | 2276 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2277 | |
26b15dad JHS |
2278 | c.seq = hdr->sadb_msg_seq; |
2279 | c.pid = hdr->sadb_msg_pid; | |
1da177e4 | 2280 | |
26b15dad JHS |
2281 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2282 | xfrm_pol_put(xp); | |
1da177e4 LT |
2283 | return 0; |
2284 | ||
2285 | out: | |
df71837d | 2286 | security_xfrm_policy_free(xp); |
1da177e4 LT |
2287 | kfree(xp); |
2288 | return err; | |
2289 | } | |
2290 | ||
2291 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2292 | { | |
2293 | int err; | |
2294 | struct sadb_address *sa; | |
2295 | struct sadb_x_policy *pol; | |
df71837d | 2296 | struct xfrm_policy *xp, tmp; |
1da177e4 | 2297 | struct xfrm_selector sel; |
26b15dad | 2298 | struct km_event c; |
df71837d | 2299 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2300 | |
2301 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2302 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2303 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2304 | return -EINVAL; | |
2305 | ||
2306 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2307 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2308 | return -EINVAL; | |
2309 | ||
2310 | memset(&sel, 0, sizeof(sel)); | |
2311 | ||
8ff24541 | 2312 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2313 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2314 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2315 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2316 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2317 | if (sel.sport) | |
8f83f23e | 2318 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2319 | |
8ff24541 | 2320 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2321 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2322 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2323 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2324 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2325 | if (sel.dport) | |
8f83f23e | 2326 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2327 | |
df71837d TJ |
2328 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2329 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
2330 | ||
2331 | if (sec_ctx != NULL) { | |
2332 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2333 | ||
2334 | if (!uctx) | |
2335 | return -ENOMEM; | |
2336 | ||
2337 | err = security_xfrm_policy_alloc(&tmp, uctx); | |
2338 | kfree(uctx); | |
2339 | ||
2340 | if (err) | |
2341 | return err; | |
2342 | } | |
2343 | ||
f7b6983f | 2344 | xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1, |
ef41aaa0 | 2345 | &sel, tmp.security, 1, &err); |
df71837d | 2346 | security_xfrm_policy_free(&tmp); |
161a09e7 | 2347 | |
1da177e4 LT |
2348 | if (xp == NULL) |
2349 | return -ENOENT; | |
2350 | ||
13fcfbb0 DM |
2351 | xfrm_audit_log(audit_get_loginuid(current->audit_context), 0, |
2352 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
2353 | ||
2354 | if (err) | |
c8c05a8e | 2355 | goto out; |
13fcfbb0 | 2356 | |
26b15dad JHS |
2357 | c.seq = hdr->sadb_msg_seq; |
2358 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 2359 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2360 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2361 | ||
c8c05a8e | 2362 | out: |
26b15dad JHS |
2363 | xfrm_pol_put(xp); |
2364 | return err; | |
2365 | } | |
2366 | ||
2367 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) | |
2368 | { | |
2369 | int err; | |
2370 | struct sk_buff *out_skb; | |
2371 | struct sadb_msg *out_hdr; | |
2372 | err = 0; | |
2373 | ||
1da177e4 LT |
2374 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2375 | if (IS_ERR(out_skb)) { | |
2376 | err = PTR_ERR(out_skb); | |
2377 | goto out; | |
2378 | } | |
55569ce2 KM |
2379 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2380 | if (err < 0) | |
2381 | goto out; | |
1da177e4 LT |
2382 | |
2383 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2384 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2385 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2386 | out_hdr->sadb_msg_satype = 0; |
2387 | out_hdr->sadb_msg_errno = 0; | |
2388 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2389 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
26b15dad | 2390 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); |
1da177e4 LT |
2391 | err = 0; |
2392 | ||
2393 | out: | |
1da177e4 LT |
2394 | return err; |
2395 | } | |
2396 | ||
08de61be SS |
2397 | #ifdef CONFIG_NET_KEY_MIGRATE |
2398 | static int pfkey_sockaddr_pair_size(sa_family_t family) | |
2399 | { | |
2400 | switch (family) { | |
2401 | case AF_INET: | |
2402 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2); | |
2403 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2404 | case AF_INET6: | |
2405 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2); | |
2406 | #endif | |
2407 | default: | |
2408 | return 0; | |
2409 | } | |
2410 | /* NOTREACHED */ | |
2411 | } | |
2412 | ||
2413 | static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq, | |
2414 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
2415 | u16 *family) | |
2416 | { | |
2417 | struct sockaddr *sa = (struct sockaddr *)(rq + 1); | |
2418 | if (rq->sadb_x_ipsecrequest_len < | |
2419 | pfkey_sockaddr_pair_size(sa->sa_family)) | |
2420 | return -EINVAL; | |
2421 | ||
2422 | switch (sa->sa_family) { | |
2423 | case AF_INET: | |
2424 | { | |
2425 | struct sockaddr_in *sin; | |
2426 | sin = (struct sockaddr_in *)sa; | |
2427 | if ((sin+1)->sin_family != AF_INET) | |
2428 | return -EINVAL; | |
2429 | memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4)); | |
2430 | sin++; | |
2431 | memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4)); | |
2432 | *family = AF_INET; | |
2433 | break; | |
2434 | } | |
2435 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2436 | case AF_INET6: | |
2437 | { | |
2438 | struct sockaddr_in6 *sin6; | |
2439 | sin6 = (struct sockaddr_in6 *)sa; | |
2440 | if ((sin6+1)->sin6_family != AF_INET6) | |
2441 | return -EINVAL; | |
2442 | memcpy(&saddr->a6, &sin6->sin6_addr, | |
2443 | sizeof(saddr->a6)); | |
2444 | sin6++; | |
2445 | memcpy(&daddr->a6, &sin6->sin6_addr, | |
2446 | sizeof(daddr->a6)); | |
2447 | *family = AF_INET6; | |
2448 | break; | |
2449 | } | |
2450 | #endif | |
2451 | default: | |
2452 | return -EINVAL; | |
2453 | } | |
2454 | ||
2455 | return 0; | |
2456 | } | |
2457 | ||
2458 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, | |
2459 | struct xfrm_migrate *m) | |
2460 | { | |
2461 | int err; | |
2462 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2463 | int mode; |
08de61be SS |
2464 | |
2465 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2466 | len < rq1->sadb_x_ipsecrequest_len) | |
2467 | return -EINVAL; | |
2468 | ||
2469 | /* old endoints */ | |
2470 | err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr, | |
2471 | &m->old_family); | |
2472 | if (err) | |
2473 | return err; | |
2474 | ||
2475 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2476 | len -= rq1->sadb_x_ipsecrequest_len; | |
2477 | ||
2478 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2479 | len < rq2->sadb_x_ipsecrequest_len) | |
2480 | return -EINVAL; | |
2481 | ||
2482 | /* new endpoints */ | |
2483 | err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr, | |
2484 | &m->new_family); | |
2485 | if (err) | |
2486 | return err; | |
2487 | ||
2488 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2489 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2490 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2491 | return -EINVAL; | |
2492 | ||
2493 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2494 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2495 | return -EINVAL; | |
2496 | m->mode = mode; | |
08de61be SS |
2497 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2498 | ||
2499 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2500 | rq2->sadb_x_ipsecrequest_len)); | |
2501 | } | |
2502 | ||
2503 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2504 | struct sadb_msg *hdr, void **ext_hdrs) | |
2505 | { | |
2506 | int i, len, ret, err = -EINVAL; | |
2507 | u8 dir; | |
2508 | struct sadb_address *sa; | |
2509 | struct sadb_x_policy *pol; | |
2510 | struct sadb_x_ipsecrequest *rq; | |
2511 | struct xfrm_selector sel; | |
2512 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
2513 | ||
2514 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
2515 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || | |
2516 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { | |
2517 | err = -EINVAL; | |
2518 | goto out; | |
2519 | } | |
2520 | ||
2521 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; | |
2522 | if (!pol) { | |
2523 | err = -EINVAL; | |
2524 | goto out; | |
2525 | } | |
2526 | ||
2527 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2528 | err = -EINVAL; | |
2529 | goto out; | |
2530 | } | |
2531 | ||
2532 | dir = pol->sadb_x_policy_dir - 1; | |
2533 | memset(&sel, 0, sizeof(sel)); | |
2534 | ||
2535 | /* set source address info of selector */ | |
2536 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2537 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2538 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2539 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2540 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2541 | if (sel.sport) | |
2542 | sel.sport_mask = ~0; | |
2543 | ||
2544 | /* set destination address info of selector */ | |
2545 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], | |
2546 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2547 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2548 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2549 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2550 | if (sel.dport) | |
2551 | sel.dport_mask = ~0; | |
2552 | ||
2553 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2554 | ||
2555 | /* extract ipsecrequests */ | |
2556 | i = 0; | |
2557 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2558 | ||
2559 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2560 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2561 | if (ret < 0) { | |
2562 | err = ret; | |
2563 | goto out; | |
2564 | } else { | |
2565 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2566 | len -= ret; | |
2567 | i++; | |
2568 | } | |
2569 | } | |
2570 | ||
2571 | if (!i || len > 0) { | |
2572 | err = -EINVAL; | |
2573 | goto out; | |
2574 | } | |
2575 | ||
2576 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i); | |
2577 | ||
2578 | out: | |
2579 | return err; | |
2580 | } | |
2581 | #else | |
2582 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2583 | struct sadb_msg *hdr, void **ext_hdrs) | |
2584 | { | |
2585 | return -ENOPROTOOPT; | |
2586 | } | |
2587 | #endif | |
2588 | ||
2589 | ||
1da177e4 LT |
2590 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2591 | { | |
77d8d7a6 | 2592 | unsigned int dir; |
215a2dd3 | 2593 | int err = 0, delete; |
1da177e4 LT |
2594 | struct sadb_x_policy *pol; |
2595 | struct xfrm_policy *xp; | |
26b15dad | 2596 | struct km_event c; |
1da177e4 LT |
2597 | |
2598 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2599 | return -EINVAL; | |
2600 | ||
77d8d7a6 HX |
2601 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2602 | if (dir >= XFRM_POLICY_MAX) | |
2603 | return -EINVAL; | |
2604 | ||
215a2dd3 | 2605 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
f7b6983f | 2606 | xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id, |
215a2dd3 | 2607 | delete, &err); |
1da177e4 LT |
2608 | if (xp == NULL) |
2609 | return -ENOENT; | |
2610 | ||
215a2dd3 EP |
2611 | if (delete) { |
2612 | xfrm_audit_log(audit_get_loginuid(current->audit_context), 0, | |
2613 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1da177e4 | 2614 | |
215a2dd3 EP |
2615 | if (err) |
2616 | goto out; | |
2617 | c.seq = hdr->sadb_msg_seq; | |
2618 | c.pid = hdr->sadb_msg_pid; | |
bf08867f | 2619 | c.data.byid = 1; |
f60f6b8f | 2620 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2621 | km_policy_notify(xp, dir, &c); |
26b15dad | 2622 | } else { |
77d8d7a6 | 2623 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2624 | } |
1da177e4 | 2625 | |
215a2dd3 | 2626 | out: |
1da177e4 LT |
2627 | xfrm_pol_put(xp); |
2628 | return err; | |
2629 | } | |
2630 | ||
2631 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2632 | { | |
2633 | struct pfkey_dump_data *data = ptr; | |
2634 | struct sk_buff *out_skb; | |
2635 | struct sadb_msg *out_hdr; | |
55569ce2 | 2636 | int err; |
1da177e4 LT |
2637 | |
2638 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2639 | if (IS_ERR(out_skb)) | |
2640 | return PTR_ERR(out_skb); | |
2641 | ||
55569ce2 KM |
2642 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2643 | if (err < 0) | |
2644 | return err; | |
1da177e4 LT |
2645 | |
2646 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2647 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | |
2648 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; | |
2649 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2650 | out_hdr->sadb_msg_errno = 0; | |
2651 | out_hdr->sadb_msg_seq = count; | |
2652 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | |
2653 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | |
2654 | return 0; | |
2655 | } | |
2656 | ||
2657 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2658 | { | |
2659 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | |
2660 | ||
f7b6983f | 2661 | return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data); |
1da177e4 LT |
2662 | } |
2663 | ||
26b15dad | 2664 | static int key_notify_policy_flush(struct km_event *c) |
1da177e4 LT |
2665 | { |
2666 | struct sk_buff *skb_out; | |
26b15dad | 2667 | struct sadb_msg *hdr; |
1da177e4 | 2668 | |
26b15dad | 2669 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2670 | if (!skb_out) |
2671 | return -ENOBUFS; | |
26b15dad | 2672 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2673 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad JHS |
2674 | hdr->sadb_msg_seq = c->seq; |
2675 | hdr->sadb_msg_pid = c->pid; | |
2676 | hdr->sadb_msg_version = PF_KEY_V2; | |
2677 | hdr->sadb_msg_errno = (uint8_t) 0; | |
2678 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
2679 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2680 | return 0; | |
1da177e4 | 2681 | |
26b15dad JHS |
2682 | } |
2683 | ||
2684 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2685 | { | |
2686 | struct km_event c; | |
161a09e7 | 2687 | struct xfrm_audit audit_info; |
1da177e4 | 2688 | |
161a09e7 JL |
2689 | audit_info.loginuid = audit_get_loginuid(current->audit_context); |
2690 | audit_info.secid = 0; | |
2691 | xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info); | |
f7b6983f | 2692 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2693 | c.event = XFRM_MSG_FLUSHPOLICY; |
26b15dad JHS |
2694 | c.pid = hdr->sadb_msg_pid; |
2695 | c.seq = hdr->sadb_msg_seq; | |
2696 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
2697 | |
2698 | return 0; | |
2699 | } | |
2700 | ||
2701 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
2702 | struct sadb_msg *hdr, void **ext_hdrs); | |
2703 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { | |
2704 | [SADB_RESERVED] = pfkey_reserved, | |
2705 | [SADB_GETSPI] = pfkey_getspi, | |
2706 | [SADB_UPDATE] = pfkey_add, | |
2707 | [SADB_ADD] = pfkey_add, | |
2708 | [SADB_DELETE] = pfkey_delete, | |
2709 | [SADB_GET] = pfkey_get, | |
2710 | [SADB_ACQUIRE] = pfkey_acquire, | |
2711 | [SADB_REGISTER] = pfkey_register, | |
2712 | [SADB_EXPIRE] = NULL, | |
2713 | [SADB_FLUSH] = pfkey_flush, | |
2714 | [SADB_DUMP] = pfkey_dump, | |
2715 | [SADB_X_PROMISC] = pfkey_promisc, | |
2716 | [SADB_X_PCHANGE] = NULL, | |
2717 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2718 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2719 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2720 | [SADB_X_SPDGET] = pfkey_spdget, | |
2721 | [SADB_X_SPDACQUIRE] = NULL, | |
2722 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2723 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2724 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2725 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2726 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2727 | }; |
2728 | ||
2729 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) | |
2730 | { | |
2731 | void *ext_hdrs[SADB_EXT_MAX]; | |
2732 | int err; | |
2733 | ||
2734 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
2735 | BROADCAST_PROMISC_ONLY, NULL); | |
2736 | ||
2737 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2738 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2739 | if (!err) { | |
2740 | err = -EOPNOTSUPP; | |
2741 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2742 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2743 | } | |
2744 | return err; | |
2745 | } | |
2746 | ||
2747 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2748 | { | |
2749 | struct sadb_msg *hdr = NULL; | |
2750 | ||
2751 | if (skb->len < sizeof(*hdr)) { | |
2752 | *errp = -EMSGSIZE; | |
2753 | } else { | |
2754 | hdr = (struct sadb_msg *) skb->data; | |
2755 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2756 | hdr->sadb_msg_reserved != 0 || | |
2757 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2758 | hdr->sadb_msg_type > SADB_MAX)) { | |
2759 | hdr = NULL; | |
2760 | *errp = -EINVAL; | |
2761 | } else if (hdr->sadb_msg_len != (skb->len / | |
2762 | sizeof(uint64_t)) || | |
2763 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2764 | sizeof(uint64_t))) { | |
2765 | hdr = NULL; | |
2766 | *errp = -EMSGSIZE; | |
2767 | } else { | |
2768 | *errp = 0; | |
2769 | } | |
2770 | } | |
2771 | return hdr; | |
2772 | } | |
2773 | ||
2774 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2775 | { | |
2776 | return t->aalgos & (1 << d->desc.sadb_alg_id); | |
2777 | } | |
2778 | ||
2779 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2780 | { | |
2781 | return t->ealgos & (1 << d->desc.sadb_alg_id); | |
2782 | } | |
2783 | ||
2784 | static int count_ah_combs(struct xfrm_tmpl *t) | |
2785 | { | |
2786 | int i, sz = 0; | |
2787 | ||
2788 | for (i = 0; ; i++) { | |
2789 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2790 | if (!aalg) | |
2791 | break; | |
2792 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2793 | sz += sizeof(struct sadb_comb); | |
2794 | } | |
2795 | return sz + sizeof(struct sadb_prop); | |
2796 | } | |
2797 | ||
2798 | static int count_esp_combs(struct xfrm_tmpl *t) | |
2799 | { | |
2800 | int i, k, sz = 0; | |
2801 | ||
2802 | for (i = 0; ; i++) { | |
2803 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2804 | if (!ealg) | |
2805 | break; | |
8ff24541 | 2806 | |
1da177e4 LT |
2807 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2808 | continue; | |
8ff24541 | 2809 | |
1da177e4 LT |
2810 | for (k = 1; ; k++) { |
2811 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2812 | if (!aalg) | |
2813 | break; | |
8ff24541 | 2814 | |
1da177e4 LT |
2815 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2816 | sz += sizeof(struct sadb_comb); | |
2817 | } | |
2818 | } | |
2819 | return sz + sizeof(struct sadb_prop); | |
2820 | } | |
2821 | ||
2822 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2823 | { | |
2824 | struct sadb_prop *p; | |
2825 | int i; | |
2826 | ||
2827 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2828 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2829 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2830 | p->sadb_prop_replay = 32; | |
2831 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2832 | ||
2833 | for (i = 0; ; i++) { | |
2834 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2835 | if (!aalg) | |
2836 | break; | |
2837 | ||
2838 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | |
2839 | struct sadb_comb *c; | |
2840 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2841 | memset(c, 0, sizeof(*c)); | |
2842 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2843 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2844 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2845 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2846 | c->sadb_comb_hard_addtime = 24*60*60; | |
2847 | c->sadb_comb_soft_addtime = 20*60*60; | |
2848 | c->sadb_comb_hard_usetime = 8*60*60; | |
2849 | c->sadb_comb_soft_usetime = 7*60*60; | |
2850 | } | |
2851 | } | |
2852 | } | |
2853 | ||
2854 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2855 | { | |
2856 | struct sadb_prop *p; | |
2857 | int i, k; | |
2858 | ||
2859 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2860 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2861 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2862 | p->sadb_prop_replay = 32; | |
2863 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2864 | ||
2865 | for (i=0; ; i++) { | |
2866 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2867 | if (!ealg) | |
2868 | break; | |
8ff24541 | 2869 | |
1da177e4 LT |
2870 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2871 | continue; | |
8ff24541 | 2872 | |
1da177e4 LT |
2873 | for (k = 1; ; k++) { |
2874 | struct sadb_comb *c; | |
2875 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2876 | if (!aalg) | |
2877 | break; | |
2878 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | |
2879 | continue; | |
2880 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2881 | memset(c, 0, sizeof(*c)); | |
2882 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2883 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2884 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2885 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2886 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2887 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2888 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2889 | c->sadb_comb_hard_addtime = 24*60*60; | |
2890 | c->sadb_comb_soft_addtime = 20*60*60; | |
2891 | c->sadb_comb_hard_usetime = 8*60*60; | |
2892 | c->sadb_comb_soft_usetime = 7*60*60; | |
2893 | } | |
2894 | } | |
2895 | } | |
2896 | ||
26b15dad JHS |
2897 | static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) |
2898 | { | |
2899 | return 0; | |
2900 | } | |
2901 | ||
2902 | static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) | |
1da177e4 LT |
2903 | { |
2904 | struct sk_buff *out_skb; | |
2905 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2906 | int hard; |
2907 | int hsc; | |
2908 | ||
bf08867f | 2909 | hard = c->data.hard; |
26b15dad JHS |
2910 | if (hard) |
2911 | hsc = 2; | |
2912 | else | |
2913 | hsc = 1; | |
1da177e4 LT |
2914 | |
2915 | out_skb = pfkey_xfrm_state2msg(x, 0, hsc); | |
2916 | if (IS_ERR(out_skb)) | |
2917 | return PTR_ERR(out_skb); | |
2918 | ||
2919 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2920 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2921 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
2922 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2923 | out_hdr->sadb_msg_errno = 0; | |
2924 | out_hdr->sadb_msg_reserved = 0; | |
2925 | out_hdr->sadb_msg_seq = 0; | |
2926 | out_hdr->sadb_msg_pid = 0; | |
2927 | ||
2928 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
2929 | return 0; | |
2930 | } | |
2931 | ||
26b15dad JHS |
2932 | static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) |
2933 | { | |
2934 | switch (c->event) { | |
f60f6b8f | 2935 | case XFRM_MSG_EXPIRE: |
26b15dad | 2936 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
2937 | case XFRM_MSG_DELSA: |
2938 | case XFRM_MSG_NEWSA: | |
2939 | case XFRM_MSG_UPDSA: | |
26b15dad | 2940 | return key_notify_sa(x, c); |
f60f6b8f | 2941 | case XFRM_MSG_FLUSHSA: |
26b15dad | 2942 | return key_notify_sa_flush(c); |
d51d081d JHS |
2943 | case XFRM_MSG_NEWAE: /* not yet supported */ |
2944 | break; | |
26b15dad JHS |
2945 | default: |
2946 | printk("pfkey: Unknown SA event %d\n", c->event); | |
2947 | break; | |
2948 | } | |
2949 | ||
2950 | return 0; | |
2951 | } | |
2952 | ||
2953 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2954 | { | |
f7b6983f MN |
2955 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
2956 | return 0; | |
2957 | ||
26b15dad | 2958 | switch (c->event) { |
f60f6b8f | 2959 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 2960 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
2961 | case XFRM_MSG_DELPOLICY: |
2962 | case XFRM_MSG_NEWPOLICY: | |
2963 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 2964 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 2965 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
2966 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
2967 | break; | |
26b15dad JHS |
2968 | return key_notify_policy_flush(c); |
2969 | default: | |
2970 | printk("pfkey: Unknown policy event %d\n", c->event); | |
2971 | break; | |
2972 | } | |
2973 | ||
2974 | return 0; | |
2975 | } | |
2976 | ||
1da177e4 LT |
2977 | static u32 get_acqseq(void) |
2978 | { | |
2979 | u32 res; | |
2980 | static u32 acqseq; | |
2981 | static DEFINE_SPINLOCK(acqseq_lock); | |
2982 | ||
2983 | spin_lock_bh(&acqseq_lock); | |
2984 | res = (++acqseq ? : ++acqseq); | |
2985 | spin_unlock_bh(&acqseq_lock); | |
2986 | return res; | |
2987 | } | |
2988 | ||
2989 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | |
2990 | { | |
2991 | struct sk_buff *skb; | |
2992 | struct sadb_msg *hdr; | |
2993 | struct sadb_address *addr; | |
2994 | struct sadb_x_policy *pol; | |
2995 | struct sockaddr_in *sin; | |
2996 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2997 | struct sockaddr_in6 *sin6; | |
2998 | #endif | |
2999 | int sockaddr_size; | |
3000 | int size; | |
4e2ba18e VY |
3001 | struct sadb_x_sec_ctx *sec_ctx; |
3002 | struct xfrm_sec_ctx *xfrm_ctx; | |
3003 | int ctx_size = 0; | |
8ff24541 | 3004 | |
1da177e4 LT |
3005 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3006 | if (!sockaddr_size) | |
3007 | return -EINVAL; | |
3008 | ||
3009 | size = sizeof(struct sadb_msg) + | |
3010 | (sizeof(struct sadb_address) * 2) + | |
3011 | (sockaddr_size * 2) + | |
3012 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3013 | |
1da177e4 LT |
3014 | if (x->id.proto == IPPROTO_AH) |
3015 | size += count_ah_combs(t); | |
3016 | else if (x->id.proto == IPPROTO_ESP) | |
3017 | size += count_esp_combs(t); | |
3018 | ||
4e2ba18e VY |
3019 | if ((xfrm_ctx = x->security)) { |
3020 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3021 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3022 | } | |
3023 | ||
1da177e4 LT |
3024 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3025 | if (skb == NULL) | |
3026 | return -ENOMEM; | |
8ff24541 | 3027 | |
1da177e4 LT |
3028 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3029 | hdr->sadb_msg_version = PF_KEY_V2; | |
3030 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3031 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3032 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3033 | hdr->sadb_msg_errno = 0; | |
3034 | hdr->sadb_msg_reserved = 0; | |
3035 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3036 | hdr->sadb_msg_pid = 0; | |
3037 | ||
3038 | /* src address */ | |
8ff24541 | 3039 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 3040 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 3041 | addr->sadb_address_len = |
1da177e4 LT |
3042 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3043 | sizeof(uint64_t); | |
3044 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3045 | addr->sadb_address_proto = 0; | |
3046 | addr->sadb_address_reserved = 0; | |
3047 | if (x->props.family == AF_INET) { | |
3048 | addr->sadb_address_prefixlen = 32; | |
3049 | ||
3050 | sin = (struct sockaddr_in *) (addr + 1); | |
3051 | sin->sin_family = AF_INET; | |
3052 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
3053 | sin->sin_port = 0; | |
3054 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3055 | } | |
3056 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3057 | else if (x->props.family == AF_INET6) { | |
3058 | addr->sadb_address_prefixlen = 128; | |
3059 | ||
3060 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3061 | sin6->sin6_family = AF_INET6; | |
3062 | sin6->sin6_port = 0; | |
3063 | sin6->sin6_flowinfo = 0; | |
3064 | memcpy(&sin6->sin6_addr, | |
3065 | x->props.saddr.a6, sizeof(struct in6_addr)); | |
3066 | sin6->sin6_scope_id = 0; | |
3067 | } | |
3068 | #endif | |
3069 | else | |
3070 | BUG(); | |
8ff24541 | 3071 | |
1da177e4 | 3072 | /* dst address */ |
8ff24541 | 3073 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
3074 | sizeof(struct sadb_address)+sockaddr_size); |
3075 | addr->sadb_address_len = | |
3076 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3077 | sizeof(uint64_t); | |
3078 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3079 | addr->sadb_address_proto = 0; | |
3080 | addr->sadb_address_reserved = 0; | |
3081 | if (x->props.family == AF_INET) { | |
8ff24541 | 3082 | addr->sadb_address_prefixlen = 32; |
1da177e4 LT |
3083 | |
3084 | sin = (struct sockaddr_in *) (addr + 1); | |
3085 | sin->sin_family = AF_INET; | |
3086 | sin->sin_addr.s_addr = x->id.daddr.a4; | |
3087 | sin->sin_port = 0; | |
3088 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3089 | } | |
3090 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3091 | else if (x->props.family == AF_INET6) { | |
8ff24541 | 3092 | addr->sadb_address_prefixlen = 128; |
1da177e4 LT |
3093 | |
3094 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3095 | sin6->sin6_family = AF_INET6; | |
3096 | sin6->sin6_port = 0; | |
3097 | sin6->sin6_flowinfo = 0; | |
3098 | memcpy(&sin6->sin6_addr, | |
3099 | x->id.daddr.a6, sizeof(struct in6_addr)); | |
3100 | sin6->sin6_scope_id = 0; | |
3101 | } | |
3102 | #endif | |
3103 | else | |
3104 | BUG(); | |
3105 | ||
3106 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
3107 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
3108 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3109 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3110 | pol->sadb_x_policy_dir = dir+1; | |
3111 | pol->sadb_x_policy_id = xp->index; | |
3112 | ||
3113 | /* Set sadb_comb's. */ | |
3114 | if (x->id.proto == IPPROTO_AH) | |
3115 | dump_ah_combs(skb, t); | |
3116 | else if (x->id.proto == IPPROTO_ESP) | |
3117 | dump_esp_combs(skb, t); | |
3118 | ||
4e2ba18e VY |
3119 | /* security context */ |
3120 | if (xfrm_ctx) { | |
3121 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
3122 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
3123 | sec_ctx->sadb_x_sec_len = | |
3124 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3125 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3126 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3127 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3128 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3129 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3130 | xfrm_ctx->ctx_len); | |
3131 | } | |
3132 | ||
1da177e4 LT |
3133 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); |
3134 | } | |
3135 | ||
cb969f07 | 3136 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3137 | u8 *data, int len, int *dir) |
1da177e4 LT |
3138 | { |
3139 | struct xfrm_policy *xp; | |
3140 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3141 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3142 | |
cb969f07 | 3143 | switch (sk->sk_family) { |
1da177e4 LT |
3144 | case AF_INET: |
3145 | if (opt != IP_IPSEC_POLICY) { | |
3146 | *dir = -EOPNOTSUPP; | |
3147 | return NULL; | |
3148 | } | |
3149 | break; | |
3150 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3151 | case AF_INET6: | |
3152 | if (opt != IPV6_IPSEC_POLICY) { | |
3153 | *dir = -EOPNOTSUPP; | |
3154 | return NULL; | |
3155 | } | |
3156 | break; | |
3157 | #endif | |
3158 | default: | |
3159 | *dir = -EINVAL; | |
3160 | return NULL; | |
3161 | } | |
3162 | ||
3163 | *dir = -EINVAL; | |
3164 | ||
3165 | if (len < sizeof(struct sadb_x_policy) || | |
3166 | pol->sadb_x_policy_len*8 > len || | |
3167 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3168 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3169 | return NULL; | |
3170 | ||
3171 | xp = xfrm_policy_alloc(GFP_ATOMIC); | |
3172 | if (xp == NULL) { | |
3173 | *dir = -ENOBUFS; | |
3174 | return NULL; | |
3175 | } | |
3176 | ||
3177 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3178 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3179 | ||
3180 | xp->lft.soft_byte_limit = XFRM_INF; | |
3181 | xp->lft.hard_byte_limit = XFRM_INF; | |
3182 | xp->lft.soft_packet_limit = XFRM_INF; | |
3183 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3184 | xp->family = sk->sk_family; |
1da177e4 LT |
3185 | |
3186 | xp->xfrm_nr = 0; | |
3187 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3188 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3189 | goto out; | |
3190 | ||
df71837d TJ |
3191 | /* security context too */ |
3192 | if (len >= (pol->sadb_x_policy_len*8 + | |
3193 | sizeof(struct sadb_x_sec_ctx))) { | |
3194 | char *p = (char *)pol; | |
3195 | struct xfrm_user_sec_ctx *uctx; | |
3196 | ||
3197 | p += pol->sadb_x_policy_len*8; | |
3198 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3199 | if (len < pol->sadb_x_policy_len*8 + | |
cb969f07 VY |
3200 | sec_ctx->sadb_x_sec_len) { |
3201 | *dir = -EINVAL; | |
df71837d | 3202 | goto out; |
cb969f07 | 3203 | } |
df71837d TJ |
3204 | if ((*dir = verify_sec_ctx_len(p))) |
3205 | goto out; | |
3206 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
3207 | *dir = security_xfrm_policy_alloc(xp, uctx); | |
3208 | kfree(uctx); | |
3209 | ||
3210 | if (*dir) | |
3211 | goto out; | |
3212 | } | |
3213 | ||
1da177e4 LT |
3214 | *dir = pol->sadb_x_policy_dir-1; |
3215 | return xp; | |
3216 | ||
3217 | out: | |
df71837d | 3218 | security_xfrm_policy_free(xp); |
1da177e4 LT |
3219 | kfree(xp); |
3220 | return NULL; | |
3221 | } | |
3222 | ||
5d36b180 | 3223 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3224 | { |
3225 | struct sk_buff *skb; | |
3226 | struct sadb_msg *hdr; | |
3227 | struct sadb_sa *sa; | |
3228 | struct sadb_address *addr; | |
3229 | struct sadb_x_nat_t_port *n_port; | |
3230 | struct sockaddr_in *sin; | |
3231 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3232 | struct sockaddr_in6 *sin6; | |
3233 | #endif | |
3234 | int sockaddr_size; | |
3235 | int size; | |
3236 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3237 | struct xfrm_encap_tmpl *natt = NULL; | |
3238 | ||
3239 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3240 | if (!sockaddr_size) | |
3241 | return -EINVAL; | |
3242 | ||
3243 | if (!satype) | |
3244 | return -EINVAL; | |
3245 | ||
3246 | if (!x->encap) | |
3247 | return -EINVAL; | |
3248 | ||
3249 | natt = x->encap; | |
3250 | ||
3251 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3252 | * | |
3253 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3254 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3255 | */ | |
8ff24541 | 3256 | |
1da177e4 LT |
3257 | size = sizeof(struct sadb_msg) + |
3258 | sizeof(struct sadb_sa) + | |
3259 | (sizeof(struct sadb_address) * 2) + | |
3260 | (sockaddr_size * 2) + | |
3261 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3262 | |
1da177e4 LT |
3263 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3264 | if (skb == NULL) | |
3265 | return -ENOMEM; | |
8ff24541 | 3266 | |
1da177e4 LT |
3267 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3268 | hdr->sadb_msg_version = PF_KEY_V2; | |
3269 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3270 | hdr->sadb_msg_satype = satype; | |
3271 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3272 | hdr->sadb_msg_errno = 0; | |
3273 | hdr->sadb_msg_reserved = 0; | |
3274 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3275 | hdr->sadb_msg_pid = 0; | |
3276 | ||
3277 | /* SA */ | |
3278 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
3279 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
3280 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3281 | sa->sadb_sa_spi = x->id.spi; | |
3282 | sa->sadb_sa_replay = 0; | |
3283 | sa->sadb_sa_state = 0; | |
3284 | sa->sadb_sa_auth = 0; | |
3285 | sa->sadb_sa_encrypt = 0; | |
3286 | sa->sadb_sa_flags = 0; | |
3287 | ||
3288 | /* ADDRESS_SRC (old addr) */ | |
3289 | addr = (struct sadb_address*) | |
3290 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3291 | addr->sadb_address_len = |
1da177e4 LT |
3292 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3293 | sizeof(uint64_t); | |
3294 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3295 | addr->sadb_address_proto = 0; | |
3296 | addr->sadb_address_reserved = 0; | |
3297 | if (x->props.family == AF_INET) { | |
3298 | addr->sadb_address_prefixlen = 32; | |
3299 | ||
3300 | sin = (struct sockaddr_in *) (addr + 1); | |
3301 | sin->sin_family = AF_INET; | |
3302 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
3303 | sin->sin_port = 0; | |
3304 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3305 | } | |
3306 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3307 | else if (x->props.family == AF_INET6) { | |
3308 | addr->sadb_address_prefixlen = 128; | |
3309 | ||
3310 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3311 | sin6->sin6_family = AF_INET6; | |
3312 | sin6->sin6_port = 0; | |
3313 | sin6->sin6_flowinfo = 0; | |
3314 | memcpy(&sin6->sin6_addr, | |
3315 | x->props.saddr.a6, sizeof(struct in6_addr)); | |
3316 | sin6->sin6_scope_id = 0; | |
3317 | } | |
3318 | #endif | |
3319 | else | |
3320 | BUG(); | |
3321 | ||
3322 | /* NAT_T_SPORT (old port) */ | |
3323 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3324 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3325 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3326 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3327 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3328 | ||
3329 | /* ADDRESS_DST (new addr) */ | |
3330 | addr = (struct sadb_address*) | |
3331 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3332 | addr->sadb_address_len = |
1da177e4 LT |
3333 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3334 | sizeof(uint64_t); | |
3335 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3336 | addr->sadb_address_proto = 0; | |
3337 | addr->sadb_address_reserved = 0; | |
3338 | if (x->props.family == AF_INET) { | |
3339 | addr->sadb_address_prefixlen = 32; | |
3340 | ||
3341 | sin = (struct sockaddr_in *) (addr + 1); | |
3342 | sin->sin_family = AF_INET; | |
3343 | sin->sin_addr.s_addr = ipaddr->a4; | |
3344 | sin->sin_port = 0; | |
3345 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3346 | } | |
3347 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3348 | else if (x->props.family == AF_INET6) { | |
3349 | addr->sadb_address_prefixlen = 128; | |
3350 | ||
3351 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3352 | sin6->sin6_family = AF_INET6; | |
3353 | sin6->sin6_port = 0; | |
3354 | sin6->sin6_flowinfo = 0; | |
3355 | memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr)); | |
3356 | sin6->sin6_scope_id = 0; | |
3357 | } | |
3358 | #endif | |
3359 | else | |
3360 | BUG(); | |
3361 | ||
3362 | /* NAT_T_DPORT (new port) */ | |
3363 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3364 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3365 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3366 | n_port->sadb_x_nat_t_port_port = sport; | |
3367 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3368 | ||
3369 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
3370 | } | |
3371 | ||
08de61be SS |
3372 | #ifdef CONFIG_NET_KEY_MIGRATE |
3373 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
3374 | struct xfrm_selector *sel) | |
3375 | { | |
3376 | struct sadb_address *addr; | |
3377 | struct sockaddr_in *sin; | |
3378 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3379 | struct sockaddr_in6 *sin6; | |
3380 | #endif | |
3381 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); | |
3382 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; | |
3383 | addr->sadb_address_exttype = type; | |
3384 | addr->sadb_address_proto = sel->proto; | |
3385 | addr->sadb_address_reserved = 0; | |
3386 | ||
3387 | switch (type) { | |
3388 | case SADB_EXT_ADDRESS_SRC: | |
3389 | if (sel->family == AF_INET) { | |
3390 | addr->sadb_address_prefixlen = sel->prefixlen_s; | |
3391 | sin = (struct sockaddr_in *)(addr + 1); | |
3392 | sin->sin_family = AF_INET; | |
3393 | memcpy(&sin->sin_addr.s_addr, &sel->saddr, | |
3394 | sizeof(sin->sin_addr.s_addr)); | |
3395 | sin->sin_port = 0; | |
3396 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3397 | } | |
3398 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3399 | else if (sel->family == AF_INET6) { | |
3400 | addr->sadb_address_prefixlen = sel->prefixlen_s; | |
3401 | sin6 = (struct sockaddr_in6 *)(addr + 1); | |
3402 | sin6->sin6_family = AF_INET6; | |
3403 | sin6->sin6_port = 0; | |
3404 | sin6->sin6_flowinfo = 0; | |
3405 | sin6->sin6_scope_id = 0; | |
3406 | memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr, | |
3407 | sizeof(sin6->sin6_addr.s6_addr)); | |
3408 | } | |
3409 | #endif | |
3410 | break; | |
3411 | case SADB_EXT_ADDRESS_DST: | |
3412 | if (sel->family == AF_INET) { | |
3413 | addr->sadb_address_prefixlen = sel->prefixlen_d; | |
3414 | sin = (struct sockaddr_in *)(addr + 1); | |
3415 | sin->sin_family = AF_INET; | |
3416 | memcpy(&sin->sin_addr.s_addr, &sel->daddr, | |
3417 | sizeof(sin->sin_addr.s_addr)); | |
3418 | sin->sin_port = 0; | |
3419 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3420 | } | |
3421 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3422 | else if (sel->family == AF_INET6) { | |
3423 | addr->sadb_address_prefixlen = sel->prefixlen_d; | |
3424 | sin6 = (struct sockaddr_in6 *)(addr + 1); | |
3425 | sin6->sin6_family = AF_INET6; | |
3426 | sin6->sin6_port = 0; | |
3427 | sin6->sin6_flowinfo = 0; | |
3428 | sin6->sin6_scope_id = 0; | |
3429 | memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr, | |
3430 | sizeof(sin6->sin6_addr.s6_addr)); | |
3431 | } | |
3432 | #endif | |
3433 | break; | |
3434 | default: | |
3435 | return -EINVAL; | |
3436 | } | |
3437 | ||
3438 | return 0; | |
3439 | } | |
3440 | ||
3441 | static int set_ipsecrequest(struct sk_buff *skb, | |
3442 | uint8_t proto, uint8_t mode, int level, | |
3443 | uint32_t reqid, uint8_t family, | |
3444 | xfrm_address_t *src, xfrm_address_t *dst) | |
3445 | { | |
3446 | struct sadb_x_ipsecrequest *rq; | |
3447 | struct sockaddr_in *sin; | |
3448 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3449 | struct sockaddr_in6 *sin6; | |
3450 | #endif | |
3451 | int size_req; | |
3452 | ||
3453 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3454 | pfkey_sockaddr_pair_size(family); | |
3455 | ||
3456 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); | |
3457 | memset(rq, 0, size_req); | |
3458 | rq->sadb_x_ipsecrequest_len = size_req; | |
3459 | rq->sadb_x_ipsecrequest_proto = proto; | |
3460 | rq->sadb_x_ipsecrequest_mode = mode; | |
3461 | rq->sadb_x_ipsecrequest_level = level; | |
3462 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3463 | ||
3464 | switch (family) { | |
3465 | case AF_INET: | |
3466 | sin = (struct sockaddr_in *)(rq + 1); | |
3467 | sin->sin_family = AF_INET; | |
3468 | memcpy(&sin->sin_addr.s_addr, src, | |
3469 | sizeof(sin->sin_addr.s_addr)); | |
3470 | sin++; | |
3471 | sin->sin_family = AF_INET; | |
3472 | memcpy(&sin->sin_addr.s_addr, dst, | |
3473 | sizeof(sin->sin_addr.s_addr)); | |
3474 | break; | |
3475 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3476 | case AF_INET6: | |
3477 | sin6 = (struct sockaddr_in6 *)(rq + 1); | |
3478 | sin6->sin6_family = AF_INET6; | |
3479 | sin6->sin6_port = 0; | |
3480 | sin6->sin6_flowinfo = 0; | |
3481 | sin6->sin6_scope_id = 0; | |
3482 | memcpy(&sin6->sin6_addr.s6_addr, src, | |
3483 | sizeof(sin6->sin6_addr.s6_addr)); | |
3484 | sin6++; | |
3485 | sin6->sin6_family = AF_INET6; | |
3486 | sin6->sin6_port = 0; | |
3487 | sin6->sin6_flowinfo = 0; | |
3488 | sin6->sin6_scope_id = 0; | |
3489 | memcpy(&sin6->sin6_addr.s6_addr, dst, | |
3490 | sizeof(sin6->sin6_addr.s6_addr)); | |
3491 | break; | |
3492 | #endif | |
3493 | default: | |
3494 | return -EINVAL; | |
3495 | } | |
3496 | ||
3497 | return 0; | |
3498 | } | |
3499 | #endif | |
3500 | ||
3501 | #ifdef CONFIG_NET_KEY_MIGRATE | |
3502 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
3503 | struct xfrm_migrate *m, int num_bundles) | |
3504 | { | |
3505 | int i; | |
3506 | int sasize_sel; | |
3507 | int size = 0; | |
3508 | int size_pol = 0; | |
3509 | struct sk_buff *skb; | |
3510 | struct sadb_msg *hdr; | |
3511 | struct sadb_x_policy *pol; | |
3512 | struct xfrm_migrate *mp; | |
3513 | ||
3514 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3515 | return 0; | |
3516 | ||
3517 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3518 | return -EINVAL; | |
3519 | ||
3520 | /* selector */ | |
3521 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3522 | if (!sasize_sel) | |
3523 | return -EINVAL; | |
3524 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3525 | ||
3526 | /* policy info */ | |
3527 | size_pol += sizeof(struct sadb_x_policy); | |
3528 | ||
3529 | /* ipsecrequests */ | |
3530 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3531 | /* old locator pair */ | |
3532 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3533 | pfkey_sockaddr_pair_size(mp->old_family); | |
3534 | /* new locator pair */ | |
3535 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3536 | pfkey_sockaddr_pair_size(mp->new_family); | |
3537 | } | |
3538 | ||
3539 | size += sizeof(struct sadb_msg) + size_pol; | |
3540 | ||
3541 | /* alloc buffer */ | |
3542 | skb = alloc_skb(size, GFP_ATOMIC); | |
3543 | if (skb == NULL) | |
3544 | return -ENOMEM; | |
3545 | ||
3546 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); | |
3547 | hdr->sadb_msg_version = PF_KEY_V2; | |
3548 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3549 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3550 | hdr->sadb_msg_len = size / 8; | |
3551 | hdr->sadb_msg_errno = 0; | |
3552 | hdr->sadb_msg_reserved = 0; | |
3553 | hdr->sadb_msg_seq = 0; | |
3554 | hdr->sadb_msg_pid = 0; | |
3555 | ||
3556 | /* selector src */ | |
3557 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3558 | ||
3559 | /* selector dst */ | |
3560 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3561 | ||
3562 | /* policy information */ | |
3563 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); | |
3564 | pol->sadb_x_policy_len = size_pol / 8; | |
3565 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3566 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3567 | pol->sadb_x_policy_dir = dir + 1; | |
3568 | pol->sadb_x_policy_id = 0; | |
3569 | pol->sadb_x_policy_priority = 0; | |
3570 | ||
3571 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3572 | /* old ipsecrequest */ | |
55569ce2 KM |
3573 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3574 | if (mode < 0) | |
3575 | return -EINVAL; | |
3576 | if (set_ipsecrequest(skb, mp->proto, mode, | |
08de61be SS |
3577 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3578 | mp->reqid, mp->old_family, | |
3579 | &mp->old_saddr, &mp->old_daddr) < 0) { | |
3580 | return -EINVAL; | |
3581 | } | |
3582 | ||
3583 | /* new ipsecrequest */ | |
55569ce2 | 3584 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3585 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3586 | mp->reqid, mp->new_family, | |
3587 | &mp->new_saddr, &mp->new_daddr) < 0) { | |
3588 | return -EINVAL; | |
3589 | } | |
3590 | } | |
3591 | ||
3592 | /* broadcast migrate message to sockets */ | |
3593 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
3594 | ||
3595 | return 0; | |
3596 | } | |
3597 | #else | |
3598 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
3599 | struct xfrm_migrate *m, int num_bundles) | |
3600 | { | |
3601 | return -ENOPROTOOPT; | |
3602 | } | |
3603 | #endif | |
3604 | ||
1da177e4 LT |
3605 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3606 | struct socket *sock, struct msghdr *msg, size_t len) | |
3607 | { | |
3608 | struct sock *sk = sock->sk; | |
3609 | struct sk_buff *skb = NULL; | |
3610 | struct sadb_msg *hdr = NULL; | |
3611 | int err; | |
3612 | ||
3613 | err = -EOPNOTSUPP; | |
3614 | if (msg->msg_flags & MSG_OOB) | |
3615 | goto out; | |
3616 | ||
3617 | err = -EMSGSIZE; | |
3618 | if ((unsigned)len > sk->sk_sndbuf - 32) | |
3619 | goto out; | |
3620 | ||
3621 | err = -ENOBUFS; | |
3622 | skb = alloc_skb(len, GFP_KERNEL); | |
3623 | if (skb == NULL) | |
3624 | goto out; | |
3625 | ||
3626 | err = -EFAULT; | |
3627 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3628 | goto out; | |
3629 | ||
3630 | hdr = pfkey_get_base_msg(skb, &err); | |
3631 | if (!hdr) | |
3632 | goto out; | |
3633 | ||
4a3e2f71 | 3634 | mutex_lock(&xfrm_cfg_mutex); |
1da177e4 | 3635 | err = pfkey_process(sk, skb, hdr); |
4a3e2f71 | 3636 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 LT |
3637 | |
3638 | out: | |
3639 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3640 | err = 0; | |
3641 | if (skb) | |
3642 | kfree_skb(skb); | |
3643 | ||
3644 | return err ? : len; | |
3645 | } | |
3646 | ||
3647 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3648 | struct socket *sock, struct msghdr *msg, size_t len, | |
3649 | int flags) | |
3650 | { | |
3651 | struct sock *sk = sock->sk; | |
3652 | struct sk_buff *skb; | |
3653 | int copied, err; | |
3654 | ||
3655 | err = -EINVAL; | |
3656 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3657 | goto out; | |
3658 | ||
3659 | msg->msg_namelen = 0; | |
3660 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | |
3661 | if (skb == NULL) | |
3662 | goto out; | |
3663 | ||
3664 | copied = skb->len; | |
3665 | if (copied > len) { | |
3666 | msg->msg_flags |= MSG_TRUNC; | |
3667 | copied = len; | |
3668 | } | |
3669 | ||
3670 | skb->h.raw = skb->data; | |
3671 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
3672 | if (err) | |
3673 | goto out_free; | |
3674 | ||
3675 | sock_recv_timestamp(msg, sk, skb); | |
3676 | ||
3677 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3678 | ||
3679 | out_free: | |
3680 | skb_free_datagram(sk, skb); | |
3681 | out: | |
3682 | return err; | |
3683 | } | |
3684 | ||
90ddc4f0 | 3685 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3686 | .family = PF_KEY, |
3687 | .owner = THIS_MODULE, | |
3688 | /* Operations that make no sense on pfkey sockets. */ | |
3689 | .bind = sock_no_bind, | |
3690 | .connect = sock_no_connect, | |
3691 | .socketpair = sock_no_socketpair, | |
3692 | .accept = sock_no_accept, | |
3693 | .getname = sock_no_getname, | |
3694 | .ioctl = sock_no_ioctl, | |
3695 | .listen = sock_no_listen, | |
3696 | .shutdown = sock_no_shutdown, | |
3697 | .setsockopt = sock_no_setsockopt, | |
3698 | .getsockopt = sock_no_getsockopt, | |
3699 | .mmap = sock_no_mmap, | |
3700 | .sendpage = sock_no_sendpage, | |
3701 | ||
3702 | /* Now the operations that really occur. */ | |
3703 | .release = pfkey_release, | |
3704 | .poll = datagram_poll, | |
3705 | .sendmsg = pfkey_sendmsg, | |
3706 | .recvmsg = pfkey_recvmsg, | |
3707 | }; | |
3708 | ||
3709 | static struct net_proto_family pfkey_family_ops = { | |
3710 | .family = PF_KEY, | |
3711 | .create = pfkey_create, | |
3712 | .owner = THIS_MODULE, | |
3713 | }; | |
3714 | ||
3715 | #ifdef CONFIG_PROC_FS | |
3716 | static int pfkey_read_proc(char *buffer, char **start, off_t offset, | |
3717 | int length, int *eof, void *data) | |
3718 | { | |
3719 | off_t pos = 0; | |
3720 | off_t begin = 0; | |
3721 | int len = 0; | |
3722 | struct sock *s; | |
3723 | struct hlist_node *node; | |
3724 | ||
3725 | len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n"); | |
3726 | ||
3727 | read_lock(&pfkey_table_lock); | |
3728 | ||
3729 | sk_for_each(s, node, &pfkey_table) { | |
3730 | len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu", | |
3731 | s, | |
3732 | atomic_read(&s->sk_refcnt), | |
3733 | atomic_read(&s->sk_rmem_alloc), | |
3734 | atomic_read(&s->sk_wmem_alloc), | |
3735 | sock_i_uid(s), | |
3736 | sock_i_ino(s) | |
3737 | ); | |
3738 | ||
3739 | buffer[len++] = '\n'; | |
8ff24541 | 3740 | |
1da177e4 LT |
3741 | pos = begin + len; |
3742 | if (pos < offset) { | |
3743 | len = 0; | |
3744 | begin = pos; | |
3745 | } | |
3746 | if(pos > offset + length) | |
3747 | goto done; | |
3748 | } | |
3749 | *eof = 1; | |
3750 | ||
3751 | done: | |
3752 | read_unlock(&pfkey_table_lock); | |
3753 | ||
3754 | *start = buffer + (offset - begin); | |
3755 | len -= (offset - begin); | |
3756 | ||
3757 | if (len > length) | |
3758 | len = length; | |
3759 | if (len < 0) | |
3760 | len = 0; | |
3761 | ||
3762 | return len; | |
3763 | } | |
3764 | #endif | |
3765 | ||
3766 | static struct xfrm_mgr pfkeyv2_mgr = | |
3767 | { | |
3768 | .id = "pfkeyv2", | |
3769 | .notify = pfkey_send_notify, | |
3770 | .acquire = pfkey_send_acquire, | |
3771 | .compile_policy = pfkey_compile_policy, | |
3772 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3773 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3774 | .migrate = pfkey_send_migrate, |
1da177e4 LT |
3775 | }; |
3776 | ||
3777 | static void __exit ipsec_pfkey_exit(void) | |
3778 | { | |
3779 | xfrm_unregister_km(&pfkeyv2_mgr); | |
3780 | remove_proc_entry("net/pfkey", NULL); | |
3781 | sock_unregister(PF_KEY); | |
3782 | proto_unregister(&key_proto); | |
3783 | } | |
3784 | ||
3785 | static int __init ipsec_pfkey_init(void) | |
3786 | { | |
3787 | int err = proto_register(&key_proto, 0); | |
3788 | ||
3789 | if (err != 0) | |
3790 | goto out; | |
3791 | ||
3792 | err = sock_register(&pfkey_family_ops); | |
3793 | if (err != 0) | |
3794 | goto out_unregister_key_proto; | |
3795 | #ifdef CONFIG_PROC_FS | |
3796 | err = -ENOMEM; | |
3797 | if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL) | |
3798 | goto out_sock_unregister; | |
3799 | #endif | |
3800 | err = xfrm_register_km(&pfkeyv2_mgr); | |
3801 | if (err != 0) | |
3802 | goto out_remove_proc_entry; | |
3803 | out: | |
3804 | return err; | |
3805 | out_remove_proc_entry: | |
3806 | #ifdef CONFIG_PROC_FS | |
3807 | remove_proc_entry("net/pfkey", NULL); | |
3808 | out_sock_unregister: | |
3809 | #endif | |
3810 | sock_unregister(PF_KEY); | |
3811 | out_unregister_key_proto: | |
3812 | proto_unregister(&key_proto); | |
3813 | goto out; | |
3814 | } | |
3815 | ||
3816 | module_init(ipsec_pfkey_init); | |
3817 | module_exit(ipsec_pfkey_exit); | |
3818 | MODULE_LICENSE("GPL"); | |
3819 | MODULE_ALIAS_NETPROTO(PF_KEY); |