Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Maxim Giryaev <gem@asplinux.ru> | |
10 | * David S. Miller <davem@redhat.com> | |
11 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
12 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
13 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> | |
14 | * Derek Atkins <derek@ihtfp.com> | |
15 | */ | |
16 | ||
4fc268d2 | 17 | #include <linux/capability.h> |
1da177e4 LT |
18 | #include <linux/module.h> |
19 | #include <linux/kernel.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/pfkeyv2.h> | |
22 | #include <linux/ipsec.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/rtnetlink.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/in6.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/init.h> | |
457c4cbc | 29 | #include <net/net_namespace.h> |
1da177e4 LT |
30 | #include <net/xfrm.h> |
31 | ||
32 | #include <net/sock.h> | |
33 | ||
34 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) | |
35 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) | |
36 | ||
37 | ||
38 | /* List of all pfkey sockets. */ | |
39 | static HLIST_HEAD(pfkey_table); | |
40 | static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); | |
41 | static DEFINE_RWLOCK(pfkey_table_lock); | |
42 | static atomic_t pfkey_table_users = ATOMIC_INIT(0); | |
43 | ||
44 | static atomic_t pfkey_socks_nr = ATOMIC_INIT(0); | |
45 | ||
46 | struct pfkey_sock { | |
47 | /* struct sock must be the first member of struct pfkey_sock */ | |
48 | struct sock sk; | |
49 | int registered; | |
50 | int promisc; | |
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 | ||
1b8d7ae4 | 139 | static int pfkey_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
140 | { |
141 | struct sock *sk; | |
142 | int err; | |
143 | ||
1b8d7ae4 EB |
144 | if (net != &init_net) |
145 | return -EAFNOSUPPORT; | |
146 | ||
1da177e4 LT |
147 | if (!capable(CAP_NET_ADMIN)) |
148 | return -EPERM; | |
149 | if (sock->type != SOCK_RAW) | |
150 | return -ESOCKTNOSUPPORT; | |
151 | if (protocol != PF_KEY_V2) | |
152 | return -EPROTONOSUPPORT; | |
153 | ||
154 | err = -ENOMEM; | |
1b8d7ae4 | 155 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, 1); |
1da177e4 LT |
156 | if (sk == NULL) |
157 | goto out; | |
8ff24541 | 158 | |
1da177e4 LT |
159 | sock->ops = &pfkey_ops; |
160 | sock_init_data(sock, sk); | |
161 | ||
162 | sk->sk_family = PF_KEY; | |
163 | sk->sk_destruct = pfkey_sock_destruct; | |
164 | ||
165 | atomic_inc(&pfkey_socks_nr); | |
166 | ||
167 | pfkey_insert(sk); | |
168 | ||
169 | return 0; | |
170 | out: | |
171 | return err; | |
172 | } | |
173 | ||
174 | static int pfkey_release(struct socket *sock) | |
175 | { | |
176 | struct sock *sk = sock->sk; | |
177 | ||
178 | if (!sk) | |
179 | return 0; | |
180 | ||
181 | pfkey_remove(sk); | |
182 | ||
183 | sock_orphan(sk); | |
184 | sock->sk = NULL; | |
185 | skb_queue_purge(&sk->sk_write_queue); | |
186 | sock_put(sk); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | |
dd0fc66f | 192 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
193 | { |
194 | int err = -ENOBUFS; | |
195 | ||
196 | sock_hold(sk); | |
197 | if (*skb2 == NULL) { | |
198 | if (atomic_read(&skb->users) != 1) { | |
199 | *skb2 = skb_clone(skb, allocation); | |
200 | } else { | |
201 | *skb2 = skb; | |
202 | atomic_inc(&skb->users); | |
203 | } | |
204 | } | |
205 | if (*skb2 != NULL) { | |
206 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { | |
207 | skb_orphan(*skb2); | |
208 | skb_set_owner_r(*skb2, sk); | |
209 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | |
210 | sk->sk_data_ready(sk, (*skb2)->len); | |
211 | *skb2 = NULL; | |
212 | err = 0; | |
213 | } | |
214 | } | |
215 | sock_put(sk); | |
216 | return err; | |
217 | } | |
218 | ||
219 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
220 | #define BROADCAST_ALL 0 | |
221 | #define BROADCAST_ONE 1 | |
222 | #define BROADCAST_REGISTERED 2 | |
223 | #define BROADCAST_PROMISC_ONLY 4 | |
dd0fc66f | 224 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
1da177e4 LT |
225 | int broadcast_flags, struct sock *one_sk) |
226 | { | |
227 | struct sock *sk; | |
228 | struct hlist_node *node; | |
229 | struct sk_buff *skb2 = NULL; | |
230 | int err = -ESRCH; | |
231 | ||
232 | /* XXX Do we need something like netlink_overrun? I think | |
233 | * XXX PF_KEY socket apps will not mind current behavior. | |
234 | */ | |
235 | if (!skb) | |
236 | return -ENOMEM; | |
237 | ||
238 | pfkey_lock_table(); | |
239 | sk_for_each(sk, node, &pfkey_table) { | |
240 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
241 | int err2; | |
242 | ||
243 | /* Yes, it means that if you are meant to receive this | |
244 | * pfkey message you receive it twice as promiscuous | |
245 | * socket. | |
246 | */ | |
247 | if (pfk->promisc) | |
248 | pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
249 | ||
250 | /* the exact target will be processed later */ | |
251 | if (sk == one_sk) | |
252 | continue; | |
253 | if (broadcast_flags != BROADCAST_ALL) { | |
254 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
255 | continue; | |
256 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
257 | !pfk->registered) | |
258 | continue; | |
259 | if (broadcast_flags & BROADCAST_ONE) | |
260 | continue; | |
261 | } | |
262 | ||
263 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
264 | ||
265 | /* Error is cleare after succecful sending to at least one | |
266 | * registered KM */ | |
267 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
268 | err = err2; | |
269 | } | |
270 | pfkey_unlock_table(); | |
271 | ||
272 | if (one_sk != NULL) | |
273 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | |
274 | ||
275 | if (skb2) | |
276 | kfree_skb(skb2); | |
277 | kfree_skb(skb); | |
278 | return err; | |
279 | } | |
280 | ||
281 | static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) | |
282 | { | |
283 | *new = *orig; | |
284 | } | |
285 | ||
286 | static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) | |
287 | { | |
288 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
289 | struct sadb_msg *hdr; | |
290 | ||
291 | if (!skb) | |
292 | return -ENOBUFS; | |
293 | ||
294 | /* Woe be to the platform trying to support PFKEY yet | |
295 | * having normal errnos outside the 1-255 range, inclusive. | |
296 | */ | |
297 | err = -err; | |
298 | if (err == ERESTARTSYS || | |
299 | err == ERESTARTNOHAND || | |
300 | err == ERESTARTNOINTR) | |
301 | err = EINTR; | |
302 | if (err >= 512) | |
303 | err = EINVAL; | |
09a62660 | 304 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
305 | |
306 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
307 | pfkey_hdr_dup(hdr, orig); | |
308 | hdr->sadb_msg_errno = (uint8_t) err; | |
309 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
310 | sizeof(uint64_t)); | |
311 | ||
312 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static u8 sadb_ext_min_len[] = { | |
318 | [SADB_EXT_RESERVED] = (u8) 0, | |
319 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
320 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
321 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
322 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
323 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
324 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
325 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
326 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
327 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
328 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
329 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
330 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
331 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
332 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
333 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
334 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
335 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
336 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
337 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
338 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
339 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
340 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
341 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 342 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
1da177e4 LT |
343 | }; |
344 | ||
345 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
346 | static int verify_address_len(void *p) | |
347 | { | |
348 | struct sadb_address *sp = p; | |
349 | struct sockaddr *addr = (struct sockaddr *)(sp + 1); | |
350 | struct sockaddr_in *sin; | |
351 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
352 | struct sockaddr_in6 *sin6; | |
353 | #endif | |
354 | int len; | |
355 | ||
356 | switch (addr->sa_family) { | |
357 | case AF_INET: | |
356f89e1 | 358 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
359 | if (sp->sadb_address_len != len || |
360 | sp->sadb_address_prefixlen > 32) | |
361 | return -EINVAL; | |
362 | break; | |
363 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
364 | case AF_INET6: | |
356f89e1 | 365 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
366 | if (sp->sadb_address_len != len || |
367 | sp->sadb_address_prefixlen > 128) | |
368 | return -EINVAL; | |
369 | break; | |
370 | #endif | |
371 | default: | |
372 | /* It is user using kernel to keep track of security | |
373 | * associations for another protocol, such as | |
374 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
375 | * lengths. | |
376 | * | |
377 | * XXX Actually, association/policy database is not yet | |
378 | * XXX able to cope with arbitrary sockaddr families. | |
379 | * XXX When it can, remove this -EINVAL. -DaveM | |
380 | */ | |
381 | return -EINVAL; | |
382 | break; | |
3ff50b79 | 383 | } |
1da177e4 LT |
384 | |
385 | return 0; | |
386 | } | |
387 | ||
df71837d TJ |
388 | static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) |
389 | { | |
356f89e1 IJ |
390 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
391 | sec_ctx->sadb_x_ctx_len, | |
392 | sizeof(uint64_t)); | |
df71837d TJ |
393 | } |
394 | ||
395 | static inline int verify_sec_ctx_len(void *p) | |
396 | { | |
397 | struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; | |
398 | int len; | |
399 | ||
400 | if (sec_ctx->sadb_x_ctx_len > PAGE_SIZE) | |
401 | return -EINVAL; | |
402 | ||
403 | len = pfkey_sec_ctx_len(sec_ctx); | |
404 | ||
405 | if (sec_ctx->sadb_x_sec_len != len) | |
406 | return -EINVAL; | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) | |
412 | { | |
413 | struct xfrm_user_sec_ctx *uctx = NULL; | |
414 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
415 | ||
416 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); | |
417 | ||
418 | if (!uctx) | |
419 | return NULL; | |
420 | ||
421 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
422 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
423 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
424 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
425 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
426 | memcpy(uctx + 1, sec_ctx + 1, | |
427 | uctx->ctx_len); | |
428 | ||
429 | return uctx; | |
430 | } | |
431 | ||
1da177e4 LT |
432 | static int present_and_same_family(struct sadb_address *src, |
433 | struct sadb_address *dst) | |
434 | { | |
435 | struct sockaddr *s_addr, *d_addr; | |
436 | ||
437 | if (!src || !dst) | |
438 | return 0; | |
439 | ||
440 | s_addr = (struct sockaddr *)(src + 1); | |
441 | d_addr = (struct sockaddr *)(dst + 1); | |
442 | if (s_addr->sa_family != d_addr->sa_family) | |
443 | return 0; | |
444 | if (s_addr->sa_family != AF_INET | |
445 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
446 | && s_addr->sa_family != AF_INET6 | |
447 | #endif | |
448 | ) | |
449 | return 0; | |
450 | ||
451 | return 1; | |
452 | } | |
453 | ||
454 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
455 | { | |
456 | char *p = (char *) hdr; | |
457 | int len = skb->len; | |
458 | ||
459 | len -= sizeof(*hdr); | |
460 | p += sizeof(*hdr); | |
461 | while (len > 0) { | |
462 | struct sadb_ext *ehdr = (struct sadb_ext *) p; | |
463 | uint16_t ext_type; | |
464 | int ext_len; | |
465 | ||
466 | ext_len = ehdr->sadb_ext_len; | |
467 | ext_len *= sizeof(uint64_t); | |
468 | ext_type = ehdr->sadb_ext_type; | |
469 | if (ext_len < sizeof(uint64_t) || | |
470 | ext_len > len || | |
471 | ext_type == SADB_EXT_RESERVED) | |
472 | return -EINVAL; | |
473 | ||
474 | if (ext_type <= SADB_EXT_MAX) { | |
475 | int min = (int) sadb_ext_min_len[ext_type]; | |
476 | if (ext_len < min) | |
477 | return -EINVAL; | |
478 | if (ext_hdrs[ext_type-1] != NULL) | |
479 | return -EINVAL; | |
480 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
481 | ext_type == SADB_EXT_ADDRESS_DST || | |
482 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
483 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
484 | if (verify_address_len(p)) | |
485 | return -EINVAL; | |
8ff24541 | 486 | } |
df71837d TJ |
487 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
488 | if (verify_sec_ctx_len(p)) | |
489 | return -EINVAL; | |
490 | } | |
1da177e4 LT |
491 | ext_hdrs[ext_type-1] = p; |
492 | } | |
493 | p += ext_len; | |
494 | len -= ext_len; | |
495 | } | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
500 | static uint16_t | |
501 | pfkey_satype2proto(uint8_t satype) | |
502 | { | |
503 | switch (satype) { | |
504 | case SADB_SATYPE_UNSPEC: | |
505 | return IPSEC_PROTO_ANY; | |
506 | case SADB_SATYPE_AH: | |
507 | return IPPROTO_AH; | |
508 | case SADB_SATYPE_ESP: | |
509 | return IPPROTO_ESP; | |
510 | case SADB_X_SATYPE_IPCOMP: | |
511 | return IPPROTO_COMP; | |
512 | break; | |
513 | default: | |
514 | return 0; | |
515 | } | |
516 | /* NOTREACHED */ | |
517 | } | |
518 | ||
519 | static uint8_t | |
520 | pfkey_proto2satype(uint16_t proto) | |
521 | { | |
522 | switch (proto) { | |
523 | case IPPROTO_AH: | |
524 | return SADB_SATYPE_AH; | |
525 | case IPPROTO_ESP: | |
526 | return SADB_SATYPE_ESP; | |
527 | case IPPROTO_COMP: | |
528 | return SADB_X_SATYPE_IPCOMP; | |
529 | break; | |
530 | default: | |
531 | return 0; | |
532 | } | |
533 | /* NOTREACHED */ | |
534 | } | |
535 | ||
536 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
537 | * say specifically 'just raw sockets' as we encode them as 255. | |
538 | */ | |
539 | ||
540 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
541 | { | |
542 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); | |
543 | } | |
544 | ||
545 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
546 | { | |
547 | return (proto ? proto : IPSEC_PROTO_ANY); | |
548 | } | |
549 | ||
550 | static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, | |
551 | xfrm_address_t *xaddr) | |
552 | { | |
553 | switch (((struct sockaddr*)(addr + 1))->sa_family) { | |
554 | case AF_INET: | |
8ff24541 | 555 | xaddr->a4 = |
1da177e4 LT |
556 | ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr; |
557 | return AF_INET; | |
558 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
559 | case AF_INET6: | |
8ff24541 | 560 | memcpy(xaddr->a6, |
1da177e4 LT |
561 | &((struct sockaddr_in6 *)(addr + 1))->sin6_addr, |
562 | sizeof(struct in6_addr)); | |
563 | return AF_INET6; | |
564 | #endif | |
565 | default: | |
566 | return 0; | |
567 | } | |
568 | /* NOTREACHED */ | |
569 | } | |
570 | ||
571 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) | |
572 | { | |
573 | struct sadb_sa *sa; | |
574 | struct sadb_address *addr; | |
575 | uint16_t proto; | |
576 | unsigned short family; | |
577 | xfrm_address_t *xaddr; | |
578 | ||
579 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
580 | if (sa == NULL) | |
581 | return NULL; | |
582 | ||
583 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
584 | if (proto == 0) | |
585 | return NULL; | |
586 | ||
587 | /* sadb_address_len should be checked by caller */ | |
588 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
589 | if (addr == NULL) | |
590 | return NULL; | |
591 | ||
592 | family = ((struct sockaddr *)(addr + 1))->sa_family; | |
593 | switch (family) { | |
594 | case AF_INET: | |
595 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; | |
596 | break; | |
597 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
598 | case AF_INET6: | |
599 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; | |
600 | break; | |
601 | #endif | |
602 | default: | |
603 | xaddr = NULL; | |
604 | } | |
605 | ||
606 | if (!xaddr) | |
607 | return NULL; | |
608 | ||
609 | return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); | |
610 | } | |
611 | ||
612 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
613 | static int | |
614 | pfkey_sockaddr_size(sa_family_t family) | |
615 | { | |
616 | switch (family) { | |
617 | case AF_INET: | |
618 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in)); | |
619 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
620 | case AF_INET6: | |
621 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in6)); | |
622 | #endif | |
623 | default: | |
624 | return 0; | |
625 | } | |
626 | /* NOTREACHED */ | |
627 | } | |
628 | ||
55569ce2 KM |
629 | static inline int pfkey_mode_from_xfrm(int mode) |
630 | { | |
631 | switch(mode) { | |
632 | case XFRM_MODE_TRANSPORT: | |
633 | return IPSEC_MODE_TRANSPORT; | |
634 | case XFRM_MODE_TUNNEL: | |
635 | return IPSEC_MODE_TUNNEL; | |
636 | case XFRM_MODE_BEET: | |
637 | return IPSEC_MODE_BEET; | |
638 | default: | |
639 | return -1; | |
640 | } | |
641 | } | |
642 | ||
643 | static inline int pfkey_mode_to_xfrm(int mode) | |
644 | { | |
645 | switch(mode) { | |
646 | case IPSEC_MODE_ANY: /*XXX*/ | |
647 | case IPSEC_MODE_TRANSPORT: | |
648 | return XFRM_MODE_TRANSPORT; | |
649 | case IPSEC_MODE_TUNNEL: | |
650 | return XFRM_MODE_TUNNEL; | |
651 | case IPSEC_MODE_BEET: | |
652 | return XFRM_MODE_BEET; | |
653 | default: | |
654 | return -1; | |
655 | } | |
656 | } | |
657 | ||
1da177e4 LT |
658 | static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc) |
659 | { | |
660 | struct sk_buff *skb; | |
661 | struct sadb_msg *hdr; | |
662 | struct sadb_sa *sa; | |
663 | struct sadb_lifetime *lifetime; | |
664 | struct sadb_address *addr; | |
665 | struct sadb_key *key; | |
666 | struct sadb_x_sa2 *sa2; | |
667 | struct sockaddr_in *sin; | |
df71837d TJ |
668 | struct sadb_x_sec_ctx *sec_ctx; |
669 | struct xfrm_sec_ctx *xfrm_ctx; | |
670 | int ctx_size = 0; | |
1da177e4 LT |
671 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
672 | struct sockaddr_in6 *sin6; | |
673 | #endif | |
674 | int size; | |
675 | int auth_key_size = 0; | |
676 | int encrypt_key_size = 0; | |
677 | int sockaddr_size; | |
678 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 679 | int mode; |
1da177e4 LT |
680 | |
681 | /* address family check */ | |
682 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
683 | if (!sockaddr_size) | |
684 | return ERR_PTR(-EINVAL); | |
685 | ||
686 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
687 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 688 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
689 | sizeof(struct sadb_lifetime) + |
690 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
691 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 692 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
693 | sockaddr_size*2 + |
694 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
695 | |
696 | if ((xfrm_ctx = x->security)) { | |
697 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
698 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
699 | } | |
700 | ||
1da177e4 LT |
701 | /* identity & sensitivity */ |
702 | ||
703 | if ((x->props.family == AF_INET && | |
704 | x->sel.saddr.a4 != x->props.saddr.a4) | |
705 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
706 | || (x->props.family == AF_INET6 && | |
707 | memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr))) | |
708 | #endif | |
709 | ) | |
710 | size += sizeof(struct sadb_address) + sockaddr_size; | |
711 | ||
712 | if (add_keys) { | |
713 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
714 | auth_key_size = |
715 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
716 | size += sizeof(struct sadb_key) + auth_key_size; |
717 | } | |
718 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
719 | encrypt_key_size = |
720 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
721 | size += sizeof(struct sadb_key) + encrypt_key_size; |
722 | } | |
723 | } | |
724 | if (x->encap) | |
725 | natt = x->encap; | |
726 | ||
727 | if (natt && natt->encap_type) { | |
728 | size += sizeof(struct sadb_x_nat_t_type); | |
729 | size += sizeof(struct sadb_x_nat_t_port); | |
730 | size += sizeof(struct sadb_x_nat_t_port); | |
731 | } | |
732 | ||
733 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
734 | if (skb == NULL) | |
735 | return ERR_PTR(-ENOBUFS); | |
736 | ||
737 | /* call should fill header later */ | |
738 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
739 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
740 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
741 | ||
742 | /* sa */ | |
743 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
744 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
745 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
746 | sa->sadb_sa_spi = x->id.spi; | |
747 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
748 | switch (x->km.state) { |
749 | case XFRM_STATE_VALID: | |
750 | sa->sadb_sa_state = x->km.dying ? | |
751 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
752 | break; | |
753 | case XFRM_STATE_ACQ: | |
1da177e4 | 754 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
755 | break; |
756 | default: | |
1da177e4 | 757 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
758 | break; |
759 | } | |
1da177e4 LT |
760 | sa->sadb_sa_auth = 0; |
761 | if (x->aalg) { | |
762 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
763 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | |
764 | } | |
765 | sa->sadb_sa_encrypt = 0; | |
766 | BUG_ON(x->ealg && x->calg); | |
767 | if (x->ealg) { | |
768 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
769 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
770 | } | |
771 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
772 | if (x->calg) { | |
773 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
774 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
775 | } | |
776 | ||
777 | sa->sadb_sa_flags = 0; | |
778 | if (x->props.flags & XFRM_STATE_NOECN) | |
779 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
780 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
781 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
782 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
783 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
784 | |
785 | /* hard time */ | |
786 | if (hsc & 2) { | |
8ff24541 | 787 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
788 | sizeof(struct sadb_lifetime)); |
789 | lifetime->sadb_lifetime_len = | |
790 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
791 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
792 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
793 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
794 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
795 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
796 | } | |
797 | /* soft time */ | |
798 | if (hsc & 1) { | |
8ff24541 | 799 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
800 | sizeof(struct sadb_lifetime)); |
801 | lifetime->sadb_lifetime_len = | |
802 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
803 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
804 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
805 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
806 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
807 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
808 | } | |
809 | /* current time */ | |
810 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
811 | sizeof(struct sadb_lifetime)); | |
812 | lifetime->sadb_lifetime_len = | |
813 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
814 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
815 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
816 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
817 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
818 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
819 | /* src address */ | |
8ff24541 | 820 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 821 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 822 | addr->sadb_address_len = |
1da177e4 LT |
823 | (sizeof(struct sadb_address)+sockaddr_size)/ |
824 | sizeof(uint64_t); | |
825 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
826 | /* "if the ports are non-zero, then the sadb_address_proto field, |
827 | normally zero, MUST be filled in with the transport | |
1da177e4 | 828 | protocol's number." - RFC2367 */ |
8ff24541 | 829 | addr->sadb_address_proto = 0; |
1da177e4 LT |
830 | addr->sadb_address_reserved = 0; |
831 | if (x->props.family == AF_INET) { | |
832 | addr->sadb_address_prefixlen = 32; | |
833 | ||
834 | sin = (struct sockaddr_in *) (addr + 1); | |
835 | sin->sin_family = AF_INET; | |
836 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
837 | sin->sin_port = 0; | |
838 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
839 | } | |
840 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
841 | else if (x->props.family == AF_INET6) { | |
8ff24541 | 842 | addr->sadb_address_prefixlen = 128; |
1da177e4 LT |
843 | |
844 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
845 | sin6->sin6_family = AF_INET6; | |
846 | sin6->sin6_port = 0; | |
847 | sin6->sin6_flowinfo = 0; | |
8ff24541 | 848 | memcpy(&sin6->sin6_addr, x->props.saddr.a6, |
1da177e4 LT |
849 | sizeof(struct in6_addr)); |
850 | sin6->sin6_scope_id = 0; | |
8ff24541 | 851 | } |
1da177e4 LT |
852 | #endif |
853 | else | |
854 | BUG(); | |
855 | ||
856 | /* dst address */ | |
8ff24541 | 857 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 858 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 859 | addr->sadb_address_len = |
1da177e4 LT |
860 | (sizeof(struct sadb_address)+sockaddr_size)/ |
861 | sizeof(uint64_t); | |
862 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 YH |
863 | addr->sadb_address_proto = 0; |
864 | addr->sadb_address_prefixlen = 32; /* XXX */ | |
1da177e4 LT |
865 | addr->sadb_address_reserved = 0; |
866 | if (x->props.family == AF_INET) { | |
867 | sin = (struct sockaddr_in *) (addr + 1); | |
868 | sin->sin_family = AF_INET; | |
869 | sin->sin_addr.s_addr = x->id.daddr.a4; | |
870 | sin->sin_port = 0; | |
871 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
872 | ||
873 | if (x->sel.saddr.a4 != x->props.saddr.a4) { | |
8ff24541 | 874 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 875 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 876 | addr->sadb_address_len = |
1da177e4 LT |
877 | (sizeof(struct sadb_address)+sockaddr_size)/ |
878 | sizeof(uint64_t); | |
879 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
880 | addr->sadb_address_proto = | |
881 | pfkey_proto_from_xfrm(x->sel.proto); | |
882 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
883 | addr->sadb_address_reserved = 0; | |
884 | ||
885 | sin = (struct sockaddr_in *) (addr + 1); | |
886 | sin->sin_family = AF_INET; | |
887 | sin->sin_addr.s_addr = x->sel.saddr.a4; | |
888 | sin->sin_port = x->sel.sport; | |
889 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
890 | } | |
891 | } | |
892 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
893 | else if (x->props.family == AF_INET6) { | |
894 | addr->sadb_address_prefixlen = 128; | |
895 | ||
896 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
897 | sin6->sin6_family = AF_INET6; | |
898 | sin6->sin6_port = 0; | |
899 | sin6->sin6_flowinfo = 0; | |
900 | memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr)); | |
901 | sin6->sin6_scope_id = 0; | |
902 | ||
903 | if (memcmp (x->sel.saddr.a6, x->props.saddr.a6, | |
904 | sizeof(struct in6_addr))) { | |
8ff24541 | 905 | addr = (struct sadb_address *) skb_put(skb, |
1da177e4 | 906 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 907 | addr->sadb_address_len = |
1da177e4 LT |
908 | (sizeof(struct sadb_address)+sockaddr_size)/ |
909 | sizeof(uint64_t); | |
910 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
911 | addr->sadb_address_proto = | |
912 | pfkey_proto_from_xfrm(x->sel.proto); | |
913 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
914 | addr->sadb_address_reserved = 0; | |
915 | ||
916 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
917 | sin6->sin6_family = AF_INET6; | |
918 | sin6->sin6_port = x->sel.sport; | |
919 | sin6->sin6_flowinfo = 0; | |
920 | memcpy(&sin6->sin6_addr, x->sel.saddr.a6, | |
921 | sizeof(struct in6_addr)); | |
922 | sin6->sin6_scope_id = 0; | |
923 | } | |
924 | } | |
925 | #endif | |
926 | else | |
927 | BUG(); | |
928 | ||
929 | /* auth key */ | |
930 | if (add_keys && auth_key_size) { | |
8ff24541 | 931 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 LT |
932 | sizeof(struct sadb_key)+auth_key_size); |
933 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
934 | sizeof(uint64_t); | |
935 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
936 | key->sadb_key_bits = x->aalg->alg_key_len; | |
937 | key->sadb_key_reserved = 0; | |
938 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
939 | } | |
940 | /* encrypt key */ | |
941 | if (add_keys && encrypt_key_size) { | |
8ff24541 | 942 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 | 943 | sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541 | 944 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
945 | encrypt_key_size) / sizeof(uint64_t); |
946 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
947 | key->sadb_key_bits = x->ealg->alg_key_len; | |
948 | key->sadb_key_reserved = 0; | |
8ff24541 | 949 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
950 | (x->ealg->alg_key_len+7)/8); |
951 | } | |
952 | ||
953 | /* sa */ | |
954 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
955 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
956 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
957 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
958 | kfree_skb(skb); | |
959 | return ERR_PTR(-EINVAL); | |
960 | } | |
961 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
962 | sa2->sadb_x_sa2_reserved1 = 0; |
963 | sa2->sadb_x_sa2_reserved2 = 0; | |
964 | sa2->sadb_x_sa2_sequence = 0; | |
965 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
966 | ||
967 | if (natt && natt->encap_type) { | |
968 | struct sadb_x_nat_t_type *n_type; | |
969 | struct sadb_x_nat_t_port *n_port; | |
970 | ||
971 | /* type */ | |
972 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
973 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
974 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
975 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
976 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
977 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
978 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
979 | ||
980 | /* source port */ | |
981 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
982 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
983 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
984 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
985 | n_port->sadb_x_nat_t_port_reserved = 0; | |
986 | ||
987 | /* dest port */ | |
988 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
989 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
990 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
991 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
992 | n_port->sadb_x_nat_t_port_reserved = 0; | |
993 | } | |
994 | ||
df71837d TJ |
995 | /* security context */ |
996 | if (xfrm_ctx) { | |
997 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
998 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
999 | sec_ctx->sadb_x_sec_len = | |
1000 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1001 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1002 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1003 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1004 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1005 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1006 | xfrm_ctx->ctx_len); | |
1007 | } | |
1008 | ||
1da177e4 LT |
1009 | return skb; |
1010 | } | |
1011 | ||
8ff24541 | 1012 | static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, |
1da177e4 LT |
1013 | void **ext_hdrs) |
1014 | { | |
8ff24541 | 1015 | struct xfrm_state *x; |
1da177e4 LT |
1016 | struct sadb_lifetime *lifetime; |
1017 | struct sadb_sa *sa; | |
1018 | struct sadb_key *key; | |
df71837d | 1019 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
1020 | uint16_t proto; |
1021 | int err; | |
8ff24541 | 1022 | |
1da177e4 LT |
1023 | |
1024 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
1025 | if (!sa || | |
1026 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1027 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1028 | return ERR_PTR(-EINVAL); | |
1029 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1030 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1031 | return ERR_PTR(-EINVAL); | |
1032 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1033 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1034 | return ERR_PTR(-EINVAL); | |
1035 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1036 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1037 | return ERR_PTR(-EINVAL); | |
1038 | ||
1039 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1040 | if (proto == 0) | |
1041 | return ERR_PTR(-EINVAL); | |
1042 | ||
1043 | /* default error is no buffer space */ | |
1044 | err = -ENOBUFS; | |
1045 | ||
1046 | /* RFC2367: | |
1047 | ||
1048 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1049 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1050 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1051 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1052 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1053 | not true. | |
1054 | ||
8ff24541 | 1055 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1056 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1057 | */ | |
1058 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1059 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1060 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1061 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1062 | return ERR_PTR(-EINVAL); | |
1063 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | |
1064 | if (key != NULL && | |
1065 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1066 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1067 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1068 | return ERR_PTR(-EINVAL); | |
1069 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1070 | if (key != NULL && | |
1071 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1072 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1073 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1074 | return ERR_PTR(-EINVAL); | |
1075 | ||
1076 | x = xfrm_state_alloc(); | |
1077 | if (x == NULL) | |
1078 | return ERR_PTR(-ENOBUFS); | |
1079 | ||
1080 | x->id.proto = proto; | |
1081 | x->id.spi = sa->sadb_sa_spi; | |
1082 | x->props.replay_window = sa->sadb_sa_replay; | |
1083 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | |
1084 | x->props.flags |= XFRM_STATE_NOECN; | |
1085 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1086 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1087 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1088 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 LT |
1089 | |
1090 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; | |
1091 | if (lifetime != NULL) { | |
1092 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1093 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1094 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1095 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1096 | } | |
1097 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; | |
1098 | if (lifetime != NULL) { | |
1099 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1100 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1101 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1102 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1103 | } | |
df71837d TJ |
1104 | |
1105 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; | |
1106 | if (sec_ctx != NULL) { | |
1107 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
1108 | ||
1109 | if (!uctx) | |
1110 | goto out; | |
1111 | ||
1112 | err = security_xfrm_state_alloc(x, uctx); | |
1113 | kfree(uctx); | |
1114 | ||
1115 | if (err) | |
1116 | goto out; | |
1117 | } | |
1118 | ||
1da177e4 LT |
1119 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1120 | if (sa->sadb_sa_auth) { | |
1121 | int keysize = 0; | |
1122 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
1123 | if (!a) { | |
1124 | err = -ENOSYS; | |
1125 | goto out; | |
1126 | } | |
1127 | if (key) | |
1128 | keysize = (key->sadb_key_bits + 7) / 8; | |
1129 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1130 | if (!x->aalg) | |
1131 | goto out; | |
1132 | strcpy(x->aalg->alg_name, a->name); | |
1133 | x->aalg->alg_key_len = 0; | |
1134 | if (key) { | |
1135 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1136 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1137 | } | |
1138 | x->props.aalgo = sa->sadb_sa_auth; | |
1139 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1140 | } | |
1141 | if (sa->sadb_sa_encrypt) { | |
1142 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1143 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
1144 | if (!a) { | |
1145 | err = -ENOSYS; | |
1146 | goto out; | |
1147 | } | |
1148 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1149 | if (!x->calg) | |
1150 | goto out; | |
1151 | strcpy(x->calg->alg_name, a->name); | |
1152 | x->props.calgo = sa->sadb_sa_encrypt; | |
1153 | } else { | |
1154 | int keysize = 0; | |
1155 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
1156 | if (!a) { | |
1157 | err = -ENOSYS; | |
1158 | goto out; | |
1159 | } | |
1160 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1161 | if (key) | |
1162 | keysize = (key->sadb_key_bits + 7) / 8; | |
1163 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1164 | if (!x->ealg) | |
1165 | goto out; | |
1166 | strcpy(x->ealg->alg_name, a->name); | |
1167 | x->ealg->alg_key_len = 0; | |
1168 | if (key) { | |
1169 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1170 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1171 | } | |
1172 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1173 | } | |
1174 | } | |
1175 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1176 | ||
8ff24541 | 1177 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
1178 | &x->props.saddr); |
1179 | if (!x->props.family) { | |
1180 | err = -EAFNOSUPPORT; | |
1181 | goto out; | |
1182 | } | |
8ff24541 | 1183 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1184 | &x->id.daddr); |
1185 | ||
1186 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
1187 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; | |
55569ce2 KM |
1188 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1189 | if (mode < 0) { | |
1190 | err = -EINVAL; | |
1191 | goto out; | |
1192 | } | |
1193 | x->props.mode = mode; | |
1da177e4 LT |
1194 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1195 | } | |
1196 | ||
1197 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
1198 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; | |
1199 | ||
1200 | /* Nobody uses this, but we try. */ | |
1201 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1202 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1203 | } | |
1204 | ||
4a4b6271 JL |
1205 | if (!x->sel.family) |
1206 | x->sel.family = x->props.family; | |
1207 | ||
1da177e4 LT |
1208 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
1209 | struct sadb_x_nat_t_type* n_type; | |
1210 | struct xfrm_encap_tmpl *natt; | |
1211 | ||
1212 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1213 | if (!x->encap) | |
1214 | goto out; | |
1215 | ||
1216 | natt = x->encap; | |
1217 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1218 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1219 | ||
1220 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
1221 | struct sadb_x_nat_t_port* n_port = | |
1222 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; | |
1223 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1224 | } | |
1225 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
1226 | struct sadb_x_nat_t_port* n_port = | |
1227 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; | |
1228 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1229 | } | |
1230 | } | |
1231 | ||
72cb6962 HX |
1232 | err = xfrm_init_state(x); |
1233 | if (err) | |
1da177e4 | 1234 | goto out; |
72cb6962 | 1235 | |
1da177e4 | 1236 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1237 | return x; |
1238 | ||
1239 | out: | |
1240 | x->km.state = XFRM_STATE_DEAD; | |
1241 | xfrm_state_put(x); | |
1242 | return ERR_PTR(err); | |
1243 | } | |
1244 | ||
1245 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1246 | { | |
1247 | return -EOPNOTSUPP; | |
1248 | } | |
1249 | ||
1250 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1251 | { | |
1252 | struct sk_buff *resp_skb; | |
1253 | struct sadb_x_sa2 *sa2; | |
1254 | struct sadb_address *saddr, *daddr; | |
1255 | struct sadb_msg *out_hdr; | |
658b219e | 1256 | struct sadb_spirange *range; |
1da177e4 | 1257 | struct xfrm_state *x = NULL; |
55569ce2 | 1258 | int mode; |
658b219e HX |
1259 | int err; |
1260 | u32 min_spi, max_spi; | |
1da177e4 LT |
1261 | u32 reqid; |
1262 | u8 proto; | |
1263 | unsigned short family; | |
1264 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1265 | ||
1266 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1267 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1268 | return -EINVAL; | |
1269 | ||
1270 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1271 | if (proto == 0) | |
1272 | return -EINVAL; | |
1273 | ||
1274 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1275 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1276 | if (mode < 0) | |
1277 | return -EINVAL; | |
1da177e4 LT |
1278 | reqid = sa2->sadb_x_sa2_reqid; |
1279 | } else { | |
1280 | mode = 0; | |
1281 | reqid = 0; | |
1282 | } | |
1283 | ||
1284 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1285 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1286 | ||
1287 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1288 | switch (family) { | |
1289 | case AF_INET: | |
1290 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1291 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1292 | break; | |
1293 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1294 | case AF_INET6: | |
1295 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1296 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1297 | break; | |
1298 | #endif | |
1299 | } | |
1300 | ||
1301 | if (hdr->sadb_msg_seq) { | |
1302 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1303 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { | |
1304 | xfrm_state_put(x); | |
1305 | x = NULL; | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | if (!x) | |
1310 | x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); | |
1311 | ||
1312 | if (x == NULL) | |
1313 | return -ENOENT; | |
1314 | ||
658b219e HX |
1315 | min_spi = 0x100; |
1316 | max_spi = 0x0fffffff; | |
1da177e4 | 1317 | |
658b219e HX |
1318 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1319 | if (range) { | |
1320 | min_spi = range->sadb_spirange_min; | |
1321 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1322 | } |
658b219e HX |
1323 | |
1324 | err = xfrm_alloc_spi(x, min_spi, max_spi); | |
1325 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x, 0, 3); | |
1da177e4 LT |
1326 | |
1327 | if (IS_ERR(resp_skb)) { | |
1328 | xfrm_state_put(x); | |
1329 | return PTR_ERR(resp_skb); | |
1330 | } | |
1331 | ||
1332 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1333 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1334 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1335 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1336 | out_hdr->sadb_msg_errno = 0; | |
1337 | out_hdr->sadb_msg_reserved = 0; | |
1338 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1339 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1340 | ||
1341 | xfrm_state_put(x); | |
1342 | ||
1343 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1349 | { | |
1350 | struct xfrm_state *x; | |
1351 | ||
1352 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1353 | return -EOPNOTSUPP; | |
1354 | ||
1355 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1356 | return 0; | |
1357 | ||
1358 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1359 | if (x == NULL) | |
1360 | return 0; | |
1361 | ||
1362 | spin_lock_bh(&x->lock); | |
1363 | if (x->km.state == XFRM_STATE_ACQ) { | |
1364 | x->km.state = XFRM_STATE_ERROR; | |
1365 | wake_up(&km_waitq); | |
1366 | } | |
1367 | spin_unlock_bh(&x->lock); | |
1368 | xfrm_state_put(x); | |
1369 | return 0; | |
1370 | } | |
1371 | ||
26b15dad JHS |
1372 | static inline int event2poltype(int event) |
1373 | { | |
1374 | switch (event) { | |
f60f6b8f | 1375 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1376 | return SADB_X_SPDDELETE; |
f60f6b8f | 1377 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1378 | return SADB_X_SPDADD; |
f60f6b8f | 1379 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1380 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1381 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1382 | // return SADB_X_SPDEXPIRE; |
1383 | default: | |
1384 | printk("pfkey: Unknown policy event %d\n", event); | |
1385 | break; | |
1386 | } | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | static inline int event2keytype(int event) | |
1392 | { | |
1393 | switch (event) { | |
f60f6b8f | 1394 | case XFRM_MSG_DELSA: |
26b15dad | 1395 | return SADB_DELETE; |
f60f6b8f | 1396 | case XFRM_MSG_NEWSA: |
26b15dad | 1397 | return SADB_ADD; |
f60f6b8f | 1398 | case XFRM_MSG_UPDSA: |
26b15dad | 1399 | return SADB_UPDATE; |
f60f6b8f | 1400 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1401 | return SADB_EXPIRE; |
1402 | default: | |
1403 | printk("pfkey: Unknown SA event %d\n", event); | |
1404 | break; | |
1405 | } | |
1406 | ||
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | /* ADD/UPD/DEL */ | |
1411 | static int key_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1412 | { | |
1413 | struct sk_buff *skb; | |
1414 | struct sadb_msg *hdr; | |
1415 | int hsc = 3; | |
1416 | ||
f60f6b8f | 1417 | if (c->event == XFRM_MSG_DELSA) |
26b15dad JHS |
1418 | hsc = 0; |
1419 | ||
26b15dad JHS |
1420 | skb = pfkey_xfrm_state2msg(x, 0, hsc); |
1421 | ||
1422 | if (IS_ERR(skb)) | |
1423 | return PTR_ERR(skb); | |
1424 | ||
1425 | hdr = (struct sadb_msg *) skb->data; | |
1426 | hdr->sadb_msg_version = PF_KEY_V2; | |
1427 | hdr->sadb_msg_type = event2keytype(c->event); | |
1428 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1429 | hdr->sadb_msg_errno = 0; | |
1430 | hdr->sadb_msg_reserved = 0; | |
1431 | hdr->sadb_msg_seq = c->seq; | |
1432 | hdr->sadb_msg_pid = c->pid; | |
1433 | ||
1434 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1435 | ||
1436 | return 0; | |
1437 | } | |
1da177e4 LT |
1438 | |
1439 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1440 | { | |
1da177e4 LT |
1441 | struct xfrm_state *x; |
1442 | int err; | |
26b15dad | 1443 | struct km_event c; |
1da177e4 | 1444 | |
1da177e4 LT |
1445 | x = pfkey_msg2xfrm_state(hdr, ext_hdrs); |
1446 | if (IS_ERR(x)) | |
1447 | return PTR_ERR(x); | |
1448 | ||
26b15dad | 1449 | xfrm_state_hold(x); |
1da177e4 LT |
1450 | if (hdr->sadb_msg_type == SADB_ADD) |
1451 | err = xfrm_state_add(x); | |
1452 | else | |
1453 | err = xfrm_state_update(x); | |
1454 | ||
ab5f5e8b JL |
1455 | xfrm_audit_state_add(x, err ? 0 : 1, |
1456 | audit_get_loginuid(current->audit_context), 0); | |
161a09e7 | 1457 | |
1da177e4 LT |
1458 | if (err < 0) { |
1459 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1460 | __xfrm_state_put(x); |
7d6dfe1f | 1461 | goto out; |
1da177e4 LT |
1462 | } |
1463 | ||
26b15dad | 1464 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1465 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1466 | else |
f60f6b8f | 1467 | c.event = XFRM_MSG_UPDSA; |
26b15dad JHS |
1468 | c.seq = hdr->sadb_msg_seq; |
1469 | c.pid = hdr->sadb_msg_pid; | |
1470 | km_state_notify(x, &c); | |
7d6dfe1f | 1471 | out: |
26b15dad | 1472 | xfrm_state_put(x); |
26b15dad | 1473 | return err; |
1da177e4 LT |
1474 | } |
1475 | ||
1476 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1477 | { | |
1478 | struct xfrm_state *x; | |
26b15dad JHS |
1479 | struct km_event c; |
1480 | int err; | |
1da177e4 LT |
1481 | |
1482 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1483 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1484 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1485 | return -EINVAL; | |
1486 | ||
1487 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1488 | if (x == NULL) | |
1489 | return -ESRCH; | |
1490 | ||
c8c05a8e CZ |
1491 | if ((err = security_xfrm_state_delete(x))) |
1492 | goto out; | |
1493 | ||
1da177e4 | 1494 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1495 | err = -EPERM; |
1496 | goto out; | |
1da177e4 | 1497 | } |
161a09e7 | 1498 | |
26b15dad | 1499 | err = xfrm_state_delete(x); |
161a09e7 | 1500 | |
c8c05a8e CZ |
1501 | if (err < 0) |
1502 | goto out; | |
1da177e4 | 1503 | |
26b15dad JHS |
1504 | c.seq = hdr->sadb_msg_seq; |
1505 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1506 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1507 | km_state_notify(x, &c); |
c8c05a8e | 1508 | out: |
ab5f5e8b JL |
1509 | xfrm_audit_state_delete(x, err ? 0 : 1, |
1510 | audit_get_loginuid(current->audit_context), 0); | |
26b15dad | 1511 | xfrm_state_put(x); |
1da177e4 | 1512 | |
26b15dad | 1513 | return err; |
1da177e4 LT |
1514 | } |
1515 | ||
1516 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1517 | { | |
1518 | __u8 proto; | |
1519 | struct sk_buff *out_skb; | |
1520 | struct sadb_msg *out_hdr; | |
1521 | struct xfrm_state *x; | |
1522 | ||
1523 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1524 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1525 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1526 | return -EINVAL; | |
1527 | ||
1528 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1529 | if (x == NULL) | |
1530 | return -ESRCH; | |
1531 | ||
1532 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | |
1533 | proto = x->id.proto; | |
1534 | xfrm_state_put(x); | |
1535 | if (IS_ERR(out_skb)) | |
1536 | return PTR_ERR(out_skb); | |
1537 | ||
1538 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1539 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1540 | out_hdr->sadb_msg_type = SADB_DUMP; | |
1541 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1542 | out_hdr->sadb_msg_errno = 0; | |
1543 | out_hdr->sadb_msg_reserved = 0; | |
1544 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1545 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1546 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); | |
1547 | ||
1548 | return 0; | |
1549 | } | |
1550 | ||
00fa0233 | 1551 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, |
dd0fc66f | 1552 | gfp_t allocation) |
1da177e4 LT |
1553 | { |
1554 | struct sk_buff *skb; | |
1555 | struct sadb_msg *hdr; | |
1556 | int len, auth_len, enc_len, i; | |
1557 | ||
1558 | auth_len = xfrm_count_auth_supported(); | |
1559 | if (auth_len) { | |
1560 | auth_len *= sizeof(struct sadb_alg); | |
1561 | auth_len += sizeof(struct sadb_supported); | |
1562 | } | |
8ff24541 | 1563 | |
1da177e4 LT |
1564 | enc_len = xfrm_count_enc_supported(); |
1565 | if (enc_len) { | |
1566 | enc_len *= sizeof(struct sadb_alg); | |
1567 | enc_len += sizeof(struct sadb_supported); | |
1568 | } | |
8ff24541 | 1569 | |
1da177e4 LT |
1570 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1571 | ||
1572 | skb = alloc_skb(len + 16, allocation); | |
1573 | if (!skb) | |
1574 | goto out_put_algs; | |
1575 | ||
1576 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1577 | pfkey_hdr_dup(hdr, orig); | |
1578 | hdr->sadb_msg_errno = 0; | |
1579 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1580 | ||
1581 | if (auth_len) { | |
1582 | struct sadb_supported *sp; | |
1583 | struct sadb_alg *ap; | |
1584 | ||
1585 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1586 | ap = (struct sadb_alg *) (sp + 1); | |
1587 | ||
1588 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1589 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1590 | ||
1591 | for (i = 0; ; i++) { | |
1592 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1593 | if (!aalg) | |
1594 | break; | |
1595 | if (aalg->available) | |
1596 | *ap++ = aalg->desc; | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | if (enc_len) { | |
1601 | struct sadb_supported *sp; | |
1602 | struct sadb_alg *ap; | |
1603 | ||
1604 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1605 | ap = (struct sadb_alg *) (sp + 1); | |
1606 | ||
1607 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1608 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1609 | ||
1610 | for (i = 0; ; i++) { | |
1611 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1612 | if (!ealg) | |
1613 | break; | |
1614 | if (ealg->available) | |
1615 | *ap++ = ealg->desc; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | out_put_algs: | |
1620 | return skb; | |
1621 | } | |
1622 | ||
1623 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1624 | { | |
1625 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1626 | struct sk_buff *supp_skb; | |
1627 | ||
1628 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1629 | return -EINVAL; | |
1630 | ||
1631 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1632 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1633 | return -EEXIST; | |
1634 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1635 | } | |
1636 | ||
1637 | xfrm_probe_algs(); | |
8ff24541 | 1638 | |
1da177e4 LT |
1639 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1640 | if (!supp_skb) { | |
1641 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1642 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1643 | ||
1644 | return -ENOBUFS; | |
1645 | } | |
1646 | ||
1647 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); | |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
26b15dad JHS |
1652 | static int key_notify_sa_flush(struct km_event *c) |
1653 | { | |
1654 | struct sk_buff *skb; | |
1655 | struct sadb_msg *hdr; | |
1656 | ||
1657 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1658 | if (!skb) | |
1659 | return -ENOBUFS; | |
1660 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1661 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1662 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad JHS |
1663 | hdr->sadb_msg_seq = c->seq; |
1664 | hdr->sadb_msg_pid = c->pid; | |
1665 | hdr->sadb_msg_version = PF_KEY_V2; | |
1666 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1667 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1668 | ||
1669 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1670 | ||
1671 | return 0; | |
1672 | } | |
1673 | ||
1da177e4 LT |
1674 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1675 | { | |
1676 | unsigned proto; | |
26b15dad | 1677 | struct km_event c; |
161a09e7 | 1678 | struct xfrm_audit audit_info; |
4aa2e62c | 1679 | int err; |
1da177e4 LT |
1680 | |
1681 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1682 | if (proto == 0) | |
1683 | return -EINVAL; | |
1684 | ||
161a09e7 JL |
1685 | audit_info.loginuid = audit_get_loginuid(current->audit_context); |
1686 | audit_info.secid = 0; | |
4aa2e62c JL |
1687 | err = xfrm_state_flush(proto, &audit_info); |
1688 | if (err) | |
1689 | return err; | |
bf08867f | 1690 | c.data.proto = proto; |
26b15dad JHS |
1691 | c.seq = hdr->sadb_msg_seq; |
1692 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1693 | c.event = XFRM_MSG_FLUSHSA; |
26b15dad | 1694 | km_state_notify(NULL, &c); |
1da177e4 LT |
1695 | |
1696 | return 0; | |
1697 | } | |
1698 | ||
1699 | struct pfkey_dump_data | |
1700 | { | |
1701 | struct sk_buff *skb; | |
1702 | struct sadb_msg *hdr; | |
1703 | struct sock *sk; | |
1704 | }; | |
1705 | ||
1706 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) | |
1707 | { | |
1708 | struct pfkey_dump_data *data = ptr; | |
1709 | struct sk_buff *out_skb; | |
1710 | struct sadb_msg *out_hdr; | |
1711 | ||
1712 | out_skb = pfkey_xfrm_state2msg(x, 1, 3); | |
1713 | if (IS_ERR(out_skb)) | |
1714 | return PTR_ERR(out_skb); | |
1715 | ||
1716 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1717 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | |
1718 | out_hdr->sadb_msg_type = SADB_DUMP; | |
1719 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1720 | out_hdr->sadb_msg_errno = 0; | |
1721 | out_hdr->sadb_msg_reserved = 0; | |
1722 | out_hdr->sadb_msg_seq = count; | |
1723 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | |
1724 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | |
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1729 | { | |
1730 | u8 proto; | |
1731 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | |
1732 | ||
1733 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1734 | if (proto == 0) | |
1735 | return -EINVAL; | |
1736 | ||
1737 | return xfrm_state_walk(proto, dump_sa, &data); | |
1738 | } | |
1739 | ||
1740 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1741 | { | |
1742 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1743 | int satype = hdr->sadb_msg_satype; | |
1744 | ||
1745 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
1746 | /* XXX we mangle packet... */ | |
1747 | hdr->sadb_msg_errno = 0; | |
1748 | if (satype != 0 && satype != 1) | |
1749 | return -EINVAL; | |
1750 | pfk->promisc = satype; | |
1751 | } | |
1752 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); | |
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1757 | { | |
1758 | int i; | |
1759 | u32 reqid = *(u32*)ptr; | |
1760 | ||
1761 | for (i=0; i<xp->xfrm_nr; i++) { | |
1762 | if (xp->xfrm_vec[i].reqid == reqid) | |
1763 | return -EEXIST; | |
1764 | } | |
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | static u32 gen_reqid(void) | |
1769 | { | |
1770 | u32 start; | |
1771 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; | |
1772 | ||
1773 | start = reqid; | |
1774 | do { | |
1775 | ++reqid; | |
1776 | if (reqid == 0) | |
1777 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
f7b6983f MN |
1778 | if (xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, check_reqid, |
1779 | (void*)&reqid) != -EEXIST) | |
1da177e4 LT |
1780 | return reqid; |
1781 | } while (reqid != start); | |
1782 | return 0; | |
1783 | } | |
1784 | ||
1785 | static int | |
1786 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1787 | { | |
1788 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; | |
1789 | struct sockaddr_in *sin; | |
1790 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1791 | struct sockaddr_in6 *sin6; | |
1792 | #endif | |
55569ce2 | 1793 | int mode; |
1da177e4 LT |
1794 | |
1795 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1796 | return -ELOOP; | |
1797 | ||
1798 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1799 | return -EINVAL; | |
1800 | ||
1801 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1802 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1803 | return -EINVAL; | |
1804 | t->mode = mode; | |
1da177e4 LT |
1805 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1806 | t->optional = 1; | |
1807 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1808 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1809 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1810 | t->reqid = 0; | |
1811 | if (!t->reqid && !(t->reqid = gen_reqid())) | |
1812 | return -ENOBUFS; | |
1813 | } | |
1814 | ||
1815 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1816 | if (t->mode == XFRM_MODE_TUNNEL) { |
2718aa7c MK |
1817 | struct sockaddr *sa; |
1818 | sa = (struct sockaddr *)(rq+1); | |
1819 | switch(sa->sa_family) { | |
1da177e4 | 1820 | case AF_INET: |
2718aa7c | 1821 | sin = (struct sockaddr_in*)sa; |
1da177e4 LT |
1822 | t->saddr.a4 = sin->sin_addr.s_addr; |
1823 | sin++; | |
1824 | if (sin->sin_family != AF_INET) | |
1825 | return -EINVAL; | |
1826 | t->id.daddr.a4 = sin->sin_addr.s_addr; | |
1827 | break; | |
1828 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1829 | case AF_INET6: | |
2718aa7c | 1830 | sin6 = (struct sockaddr_in6*)sa; |
1da177e4 LT |
1831 | memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); |
1832 | sin6++; | |
1833 | if (sin6->sin6_family != AF_INET6) | |
1834 | return -EINVAL; | |
1835 | memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr)); | |
1836 | break; | |
1837 | #endif | |
1838 | default: | |
1839 | return -EINVAL; | |
1840 | } | |
2718aa7c MK |
1841 | t->encap_family = sa->sa_family; |
1842 | } else | |
1843 | t->encap_family = xp->family; | |
1844 | ||
1da177e4 LT |
1845 | /* No way to set this via kame pfkey */ |
1846 | t->aalgos = t->ealgos = t->calgos = ~0; | |
1847 | xp->xfrm_nr++; | |
1848 | return 0; | |
1849 | } | |
1850 | ||
1851 | static int | |
1852 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1853 | { | |
1854 | int err; | |
1855 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1856 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1857 | ||
1858 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | |
1859 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1860 | return err; | |
1861 | len -= rq->sadb_x_ipsecrequest_len; | |
1862 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1863 | } | |
1864 | return 0; | |
1865 | } | |
1866 | ||
df71837d TJ |
1867 | static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) |
1868 | { | |
1869 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1870 | ||
1871 | if (xfrm_ctx) { | |
1872 | int len = sizeof(struct sadb_x_sec_ctx); | |
1873 | len += xfrm_ctx->ctx_len; | |
1874 | return PFKEY_ALIGN8(len); | |
1875 | } | |
1876 | return 0; | |
1877 | } | |
1878 | ||
1da177e4 LT |
1879 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) |
1880 | { | |
2718aa7c | 1881 | struct xfrm_tmpl *t; |
1da177e4 | 1882 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
1883 | int socklen = 0; |
1884 | int i; | |
1885 | ||
1886 | for (i=0; i<xp->xfrm_nr; i++) { | |
1887 | t = xp->xfrm_vec + i; | |
1888 | socklen += (t->encap_family == AF_INET ? | |
1889 | sizeof(struct sockaddr_in) : | |
1890 | sizeof(struct sockaddr_in6)); | |
1891 | } | |
1da177e4 LT |
1892 | |
1893 | return sizeof(struct sadb_msg) + | |
1894 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 1895 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
1896 | (sockaddr_size * 2) + |
1897 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
1898 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1899 | (socklen * 2) + | |
df71837d | 1900 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
1901 | } |
1902 | ||
1903 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) | |
1904 | { | |
1905 | struct sk_buff *skb; | |
1906 | int size; | |
1907 | ||
1908 | size = pfkey_xfrm_policy2msg_size(xp); | |
1909 | ||
1910 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
1911 | if (skb == NULL) | |
1912 | return ERR_PTR(-ENOBUFS); | |
1913 | ||
1914 | return skb; | |
1915 | } | |
1916 | ||
55569ce2 | 1917 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) |
1da177e4 LT |
1918 | { |
1919 | struct sadb_msg *hdr; | |
1920 | struct sadb_address *addr; | |
1921 | struct sadb_lifetime *lifetime; | |
1922 | struct sadb_x_policy *pol; | |
1923 | struct sockaddr_in *sin; | |
df71837d TJ |
1924 | struct sadb_x_sec_ctx *sec_ctx; |
1925 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
1926 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1927 | struct sockaddr_in6 *sin6; | |
1928 | #endif | |
1929 | int i; | |
1930 | int size; | |
1931 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
1932 | int socklen = (xp->family == AF_INET ? | |
1933 | sizeof(struct sockaddr_in) : | |
1934 | sizeof(struct sockaddr_in6)); | |
1935 | ||
1936 | size = pfkey_xfrm_policy2msg_size(xp); | |
1937 | ||
1938 | /* call should fill header later */ | |
1939 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
1940 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
1941 | ||
1942 | /* src address */ | |
8ff24541 | 1943 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 1944 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 1945 | addr->sadb_address_len = |
1da177e4 LT |
1946 | (sizeof(struct sadb_address)+sockaddr_size)/ |
1947 | sizeof(uint64_t); | |
1948 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
1949 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
1950 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
1951 | addr->sadb_address_reserved = 0; | |
1952 | /* src address */ | |
1953 | if (xp->family == AF_INET) { | |
1954 | sin = (struct sockaddr_in *) (addr + 1); | |
1955 | sin->sin_family = AF_INET; | |
1956 | sin->sin_addr.s_addr = xp->selector.saddr.a4; | |
1957 | sin->sin_port = xp->selector.sport; | |
1958 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
1959 | } | |
1960 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1961 | else if (xp->family == AF_INET6) { | |
1962 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
1963 | sin6->sin6_family = AF_INET6; | |
1964 | sin6->sin6_port = xp->selector.sport; | |
1965 | sin6->sin6_flowinfo = 0; | |
1966 | memcpy(&sin6->sin6_addr, xp->selector.saddr.a6, | |
1967 | sizeof(struct in6_addr)); | |
1968 | sin6->sin6_scope_id = 0; | |
1969 | } | |
1970 | #endif | |
1971 | else | |
1972 | BUG(); | |
1973 | ||
1974 | /* dst address */ | |
8ff24541 | 1975 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
1976 | sizeof(struct sadb_address)+sockaddr_size); |
1977 | addr->sadb_address_len = | |
1978 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
1979 | sizeof(uint64_t); | |
1980 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
1981 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 1982 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 LT |
1983 | addr->sadb_address_reserved = 0; |
1984 | if (xp->family == AF_INET) { | |
1985 | sin = (struct sockaddr_in *) (addr + 1); | |
1986 | sin->sin_family = AF_INET; | |
1987 | sin->sin_addr.s_addr = xp->selector.daddr.a4; | |
1988 | sin->sin_port = xp->selector.dport; | |
1989 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
1990 | } | |
1991 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1992 | else if (xp->family == AF_INET6) { | |
1993 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
1994 | sin6->sin6_family = AF_INET6; | |
1995 | sin6->sin6_port = xp->selector.dport; | |
1996 | sin6->sin6_flowinfo = 0; | |
1997 | memcpy(&sin6->sin6_addr, xp->selector.daddr.a6, | |
1998 | sizeof(struct in6_addr)); | |
1999 | sin6->sin6_scope_id = 0; | |
2000 | } | |
2001 | #endif | |
2002 | else | |
2003 | BUG(); | |
2004 | ||
2005 | /* hard time */ | |
8ff24541 | 2006 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2007 | sizeof(struct sadb_lifetime)); |
2008 | lifetime->sadb_lifetime_len = | |
2009 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2010 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2011 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2012 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2013 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2014 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2015 | /* soft time */ | |
8ff24541 | 2016 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2017 | sizeof(struct sadb_lifetime)); |
2018 | lifetime->sadb_lifetime_len = | |
2019 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2020 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2021 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2022 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2023 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2024 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2025 | /* current time */ | |
8ff24541 | 2026 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2027 | sizeof(struct sadb_lifetime)); |
2028 | lifetime->sadb_lifetime_len = | |
2029 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2030 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2031 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2032 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2033 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2034 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2035 | ||
2036 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2037 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2038 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2039 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2040 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2041 | if (xp->xfrm_nr) | |
2042 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2043 | else | |
2044 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2045 | } | |
2046 | pol->sadb_x_policy_dir = dir+1; | |
2047 | pol->sadb_x_policy_id = xp->index; | |
2048 | pol->sadb_x_policy_priority = xp->priority; | |
2049 | ||
2050 | for (i=0; i<xp->xfrm_nr; i++) { | |
2051 | struct sadb_x_ipsecrequest *rq; | |
2052 | struct xfrm_tmpl *t = xp->xfrm_vec + i; | |
2053 | int req_size; | |
55569ce2 | 2054 | int mode; |
1da177e4 LT |
2055 | |
2056 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
7e49e6de | 2057 | if (t->mode == XFRM_MODE_TUNNEL) |
2718aa7c | 2058 | req_size += ((t->encap_family == AF_INET ? |
8ff24541 YH |
2059 | sizeof(struct sockaddr_in) : |
2060 | sizeof(struct sockaddr_in6)) * 2); | |
1da177e4 LT |
2061 | else |
2062 | size -= 2*socklen; | |
2063 | rq = (void*)skb_put(skb, req_size); | |
2064 | pol->sadb_x_policy_len += req_size/8; | |
2065 | memset(rq, 0, sizeof(*rq)); | |
2066 | rq->sadb_x_ipsecrequest_len = req_size; | |
2067 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2068 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2069 | return -EINVAL; | |
fefaa75e | 2070 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2071 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2072 | if (t->reqid) | |
2073 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2074 | if (t->optional) | |
2075 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2076 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
7e49e6de | 2077 | if (t->mode == XFRM_MODE_TUNNEL) { |
2718aa7c | 2078 | switch (t->encap_family) { |
1da177e4 LT |
2079 | case AF_INET: |
2080 | sin = (void*)(rq+1); | |
2081 | sin->sin_family = AF_INET; | |
2082 | sin->sin_addr.s_addr = t->saddr.a4; | |
2083 | sin->sin_port = 0; | |
2084 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2085 | sin++; | |
2086 | sin->sin_family = AF_INET; | |
2087 | sin->sin_addr.s_addr = t->id.daddr.a4; | |
2088 | sin->sin_port = 0; | |
2089 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
2090 | break; | |
2091 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2092 | case AF_INET6: | |
2093 | sin6 = (void*)(rq+1); | |
2094 | sin6->sin6_family = AF_INET6; | |
2095 | sin6->sin6_port = 0; | |
2096 | sin6->sin6_flowinfo = 0; | |
2097 | memcpy(&sin6->sin6_addr, t->saddr.a6, | |
2098 | sizeof(struct in6_addr)); | |
2099 | sin6->sin6_scope_id = 0; | |
2100 | ||
2101 | sin6++; | |
2102 | sin6->sin6_family = AF_INET6; | |
2103 | sin6->sin6_port = 0; | |
2104 | sin6->sin6_flowinfo = 0; | |
2105 | memcpy(&sin6->sin6_addr, t->id.daddr.a6, | |
2106 | sizeof(struct in6_addr)); | |
2107 | sin6->sin6_scope_id = 0; | |
2108 | break; | |
2109 | #endif | |
2110 | default: | |
2111 | break; | |
2112 | } | |
2113 | } | |
2114 | } | |
df71837d TJ |
2115 | |
2116 | /* security context */ | |
2117 | if ((xfrm_ctx = xp->security)) { | |
2118 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2119 | ||
2120 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2121 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2122 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2123 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2124 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2125 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2126 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2127 | xfrm_ctx->ctx_len); | |
2128 | } | |
2129 | ||
1da177e4 LT |
2130 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2131 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
55569ce2 KM |
2132 | |
2133 | return 0; | |
1da177e4 LT |
2134 | } |
2135 | ||
26b15dad JHS |
2136 | static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2137 | { | |
2138 | struct sk_buff *out_skb; | |
2139 | struct sadb_msg *out_hdr; | |
2140 | int err; | |
2141 | ||
2142 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2143 | if (IS_ERR(out_skb)) { | |
2144 | err = PTR_ERR(out_skb); | |
2145 | goto out; | |
2146 | } | |
55569ce2 KM |
2147 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2148 | if (err < 0) | |
2149 | return err; | |
26b15dad JHS |
2150 | |
2151 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2152 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2153 | ||
f60f6b8f | 2154 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2155 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2156 | else | |
2157 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2158 | out_hdr->sadb_msg_errno = 0; | |
2159 | out_hdr->sadb_msg_seq = c->seq; | |
2160 | out_hdr->sadb_msg_pid = c->pid; | |
2161 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2162 | out: | |
2163 | return 0; | |
2164 | ||
2165 | } | |
2166 | ||
1da177e4 LT |
2167 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2168 | { | |
df71837d | 2169 | int err = 0; |
1da177e4 LT |
2170 | struct sadb_lifetime *lifetime; |
2171 | struct sadb_address *sa; | |
2172 | struct sadb_x_policy *pol; | |
2173 | struct xfrm_policy *xp; | |
26b15dad | 2174 | struct km_event c; |
df71837d | 2175 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2176 | |
2177 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2178 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2179 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2180 | return -EINVAL; | |
2181 | ||
2182 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2183 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2184 | return -EINVAL; | |
2185 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2186 | return -EINVAL; | |
2187 | ||
2188 | xp = xfrm_policy_alloc(GFP_KERNEL); | |
2189 | if (xp == NULL) | |
2190 | return -ENOBUFS; | |
2191 | ||
2192 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2193 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2194 | xp->priority = pol->sadb_x_policy_priority; | |
2195 | ||
8ff24541 | 2196 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2197 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
2198 | if (!xp->family) { | |
2199 | err = -EINVAL; | |
2200 | goto out; | |
2201 | } | |
2202 | xp->selector.family = xp->family; | |
2203 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2204 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2205 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2206 | if (xp->selector.sport) | |
8f83f23e | 2207 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2208 | |
8ff24541 | 2209 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2210 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2211 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2212 | ||
2213 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2214 | * in both addresses. | |
2215 | */ | |
2216 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2217 | ||
2218 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2219 | if (xp->selector.dport) | |
8f83f23e | 2220 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2221 | |
df71837d TJ |
2222 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2223 | if (sec_ctx != NULL) { | |
2224 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2225 | ||
2226 | if (!uctx) { | |
2227 | err = -ENOBUFS; | |
2228 | goto out; | |
2229 | } | |
2230 | ||
2231 | err = security_xfrm_policy_alloc(xp, uctx); | |
2232 | kfree(uctx); | |
2233 | ||
2234 | if (err) | |
2235 | goto out; | |
2236 | } | |
2237 | ||
1da177e4 LT |
2238 | xp->lft.soft_byte_limit = XFRM_INF; |
2239 | xp->lft.hard_byte_limit = XFRM_INF; | |
2240 | xp->lft.soft_packet_limit = XFRM_INF; | |
2241 | xp->lft.hard_packet_limit = XFRM_INF; | |
2242 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2243 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2244 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2245 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2246 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2247 | } | |
2248 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2249 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2250 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2251 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2252 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2253 | } | |
2254 | xp->xfrm_nr = 0; | |
2255 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2256 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2257 | goto out; | |
2258 | ||
1da177e4 LT |
2259 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2260 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2261 | |
ab5f5e8b JL |
2262 | xfrm_audit_policy_add(xp, err ? 0 : 1, |
2263 | audit_get_loginuid(current->audit_context), 0); | |
161a09e7 | 2264 | |
df71837d TJ |
2265 | if (err) |
2266 | goto out; | |
1da177e4 | 2267 | |
26b15dad | 2268 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2269 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2270 | else |
f60f6b8f | 2271 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2272 | |
26b15dad JHS |
2273 | c.seq = hdr->sadb_msg_seq; |
2274 | c.pid = hdr->sadb_msg_pid; | |
1da177e4 | 2275 | |
26b15dad JHS |
2276 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2277 | xfrm_pol_put(xp); | |
1da177e4 LT |
2278 | return 0; |
2279 | ||
2280 | out: | |
df71837d | 2281 | security_xfrm_policy_free(xp); |
1da177e4 LT |
2282 | kfree(xp); |
2283 | return err; | |
2284 | } | |
2285 | ||
2286 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2287 | { | |
2288 | int err; | |
2289 | struct sadb_address *sa; | |
2290 | struct sadb_x_policy *pol; | |
df71837d | 2291 | struct xfrm_policy *xp, tmp; |
1da177e4 | 2292 | struct xfrm_selector sel; |
26b15dad | 2293 | struct km_event c; |
df71837d | 2294 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2295 | |
2296 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2297 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2298 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2299 | return -EINVAL; | |
2300 | ||
2301 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2302 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2303 | return -EINVAL; | |
2304 | ||
2305 | memset(&sel, 0, sizeof(sel)); | |
2306 | ||
8ff24541 | 2307 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2308 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2309 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2310 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2311 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2312 | if (sel.sport) | |
8f83f23e | 2313 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2314 | |
8ff24541 | 2315 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2316 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2317 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2318 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2319 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2320 | if (sel.dport) | |
8f83f23e | 2321 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2322 | |
df71837d TJ |
2323 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2324 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
2325 | ||
2326 | if (sec_ctx != NULL) { | |
2327 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2328 | ||
2329 | if (!uctx) | |
2330 | return -ENOMEM; | |
2331 | ||
2332 | err = security_xfrm_policy_alloc(&tmp, uctx); | |
2333 | kfree(uctx); | |
2334 | ||
2335 | if (err) | |
2336 | return err; | |
2337 | } | |
2338 | ||
f7b6983f | 2339 | xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, pol->sadb_x_policy_dir-1, |
ef41aaa0 | 2340 | &sel, tmp.security, 1, &err); |
df71837d | 2341 | security_xfrm_policy_free(&tmp); |
161a09e7 | 2342 | |
1da177e4 LT |
2343 | if (xp == NULL) |
2344 | return -ENOENT; | |
2345 | ||
ab5f5e8b JL |
2346 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2347 | audit_get_loginuid(current->audit_context), 0); | |
13fcfbb0 DM |
2348 | |
2349 | if (err) | |
c8c05a8e | 2350 | goto out; |
13fcfbb0 | 2351 | |
26b15dad JHS |
2352 | c.seq = hdr->sadb_msg_seq; |
2353 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 2354 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2355 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2356 | ||
c8c05a8e | 2357 | out: |
26b15dad JHS |
2358 | xfrm_pol_put(xp); |
2359 | return err; | |
2360 | } | |
2361 | ||
2362 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) | |
2363 | { | |
2364 | int err; | |
2365 | struct sk_buff *out_skb; | |
2366 | struct sadb_msg *out_hdr; | |
2367 | err = 0; | |
2368 | ||
1da177e4 LT |
2369 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2370 | if (IS_ERR(out_skb)) { | |
2371 | err = PTR_ERR(out_skb); | |
2372 | goto out; | |
2373 | } | |
55569ce2 KM |
2374 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2375 | if (err < 0) | |
2376 | goto out; | |
1da177e4 LT |
2377 | |
2378 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2379 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2380 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2381 | out_hdr->sadb_msg_satype = 0; |
2382 | out_hdr->sadb_msg_errno = 0; | |
2383 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2384 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
26b15dad | 2385 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); |
1da177e4 LT |
2386 | err = 0; |
2387 | ||
2388 | out: | |
1da177e4 LT |
2389 | return err; |
2390 | } | |
2391 | ||
08de61be SS |
2392 | #ifdef CONFIG_NET_KEY_MIGRATE |
2393 | static int pfkey_sockaddr_pair_size(sa_family_t family) | |
2394 | { | |
2395 | switch (family) { | |
2396 | case AF_INET: | |
2397 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in) * 2); | |
2398 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2399 | case AF_INET6: | |
2400 | return PFKEY_ALIGN8(sizeof(struct sockaddr_in6) * 2); | |
2401 | #endif | |
2402 | default: | |
2403 | return 0; | |
2404 | } | |
2405 | /* NOTREACHED */ | |
2406 | } | |
2407 | ||
2408 | static int parse_sockaddr_pair(struct sadb_x_ipsecrequest *rq, | |
2409 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
2410 | u16 *family) | |
2411 | { | |
2412 | struct sockaddr *sa = (struct sockaddr *)(rq + 1); | |
2413 | if (rq->sadb_x_ipsecrequest_len < | |
2414 | pfkey_sockaddr_pair_size(sa->sa_family)) | |
2415 | return -EINVAL; | |
2416 | ||
2417 | switch (sa->sa_family) { | |
2418 | case AF_INET: | |
2419 | { | |
2420 | struct sockaddr_in *sin; | |
2421 | sin = (struct sockaddr_in *)sa; | |
2422 | if ((sin+1)->sin_family != AF_INET) | |
2423 | return -EINVAL; | |
2424 | memcpy(&saddr->a4, &sin->sin_addr, sizeof(saddr->a4)); | |
2425 | sin++; | |
2426 | memcpy(&daddr->a4, &sin->sin_addr, sizeof(daddr->a4)); | |
2427 | *family = AF_INET; | |
2428 | break; | |
2429 | } | |
2430 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2431 | case AF_INET6: | |
2432 | { | |
2433 | struct sockaddr_in6 *sin6; | |
2434 | sin6 = (struct sockaddr_in6 *)sa; | |
2435 | if ((sin6+1)->sin6_family != AF_INET6) | |
2436 | return -EINVAL; | |
2437 | memcpy(&saddr->a6, &sin6->sin6_addr, | |
2438 | sizeof(saddr->a6)); | |
2439 | sin6++; | |
2440 | memcpy(&daddr->a6, &sin6->sin6_addr, | |
2441 | sizeof(daddr->a6)); | |
2442 | *family = AF_INET6; | |
2443 | break; | |
2444 | } | |
2445 | #endif | |
2446 | default: | |
2447 | return -EINVAL; | |
2448 | } | |
2449 | ||
2450 | return 0; | |
2451 | } | |
2452 | ||
2453 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, | |
2454 | struct xfrm_migrate *m) | |
2455 | { | |
2456 | int err; | |
2457 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2458 | int mode; |
08de61be SS |
2459 | |
2460 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2461 | len < rq1->sadb_x_ipsecrequest_len) | |
2462 | return -EINVAL; | |
2463 | ||
2464 | /* old endoints */ | |
2465 | err = parse_sockaddr_pair(rq1, &m->old_saddr, &m->old_daddr, | |
2466 | &m->old_family); | |
2467 | if (err) | |
2468 | return err; | |
2469 | ||
2470 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2471 | len -= rq1->sadb_x_ipsecrequest_len; | |
2472 | ||
2473 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2474 | len < rq2->sadb_x_ipsecrequest_len) | |
2475 | return -EINVAL; | |
2476 | ||
2477 | /* new endpoints */ | |
2478 | err = parse_sockaddr_pair(rq2, &m->new_saddr, &m->new_daddr, | |
2479 | &m->new_family); | |
2480 | if (err) | |
2481 | return err; | |
2482 | ||
2483 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2484 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2485 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2486 | return -EINVAL; | |
2487 | ||
2488 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2489 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2490 | return -EINVAL; | |
2491 | m->mode = mode; | |
08de61be SS |
2492 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2493 | ||
2494 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2495 | rq2->sadb_x_ipsecrequest_len)); | |
2496 | } | |
2497 | ||
2498 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2499 | struct sadb_msg *hdr, void **ext_hdrs) | |
2500 | { | |
2501 | int i, len, ret, err = -EINVAL; | |
2502 | u8 dir; | |
2503 | struct sadb_address *sa; | |
2504 | struct sadb_x_policy *pol; | |
2505 | struct sadb_x_ipsecrequest *rq; | |
2506 | struct xfrm_selector sel; | |
2507 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
2508 | ||
2509 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
2510 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || | |
2511 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { | |
2512 | err = -EINVAL; | |
2513 | goto out; | |
2514 | } | |
2515 | ||
2516 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; | |
2517 | if (!pol) { | |
2518 | err = -EINVAL; | |
2519 | goto out; | |
2520 | } | |
2521 | ||
2522 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2523 | err = -EINVAL; | |
2524 | goto out; | |
2525 | } | |
2526 | ||
2527 | dir = pol->sadb_x_policy_dir - 1; | |
2528 | memset(&sel, 0, sizeof(sel)); | |
2529 | ||
2530 | /* set source address info of selector */ | |
2531 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2532 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2533 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2534 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2535 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2536 | if (sel.sport) | |
582ee43d | 2537 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2538 | |
2539 | /* set destination address info of selector */ | |
2540 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], | |
2541 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2542 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2543 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2544 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2545 | if (sel.dport) | |
582ee43d | 2546 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2547 | |
2548 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2549 | ||
2550 | /* extract ipsecrequests */ | |
2551 | i = 0; | |
2552 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2553 | ||
2554 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2555 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2556 | if (ret < 0) { | |
2557 | err = ret; | |
2558 | goto out; | |
2559 | } else { | |
2560 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2561 | len -= ret; | |
2562 | i++; | |
2563 | } | |
2564 | } | |
2565 | ||
2566 | if (!i || len > 0) { | |
2567 | err = -EINVAL; | |
2568 | goto out; | |
2569 | } | |
2570 | ||
2571 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i); | |
2572 | ||
2573 | out: | |
2574 | return err; | |
2575 | } | |
2576 | #else | |
2577 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2578 | struct sadb_msg *hdr, void **ext_hdrs) | |
2579 | { | |
2580 | return -ENOPROTOOPT; | |
2581 | } | |
2582 | #endif | |
2583 | ||
2584 | ||
1da177e4 LT |
2585 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2586 | { | |
77d8d7a6 | 2587 | unsigned int dir; |
215a2dd3 | 2588 | int err = 0, delete; |
1da177e4 LT |
2589 | struct sadb_x_policy *pol; |
2590 | struct xfrm_policy *xp; | |
26b15dad | 2591 | struct km_event c; |
1da177e4 LT |
2592 | |
2593 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2594 | return -EINVAL; | |
2595 | ||
77d8d7a6 HX |
2596 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2597 | if (dir >= XFRM_POLICY_MAX) | |
2598 | return -EINVAL; | |
2599 | ||
215a2dd3 | 2600 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
f7b6983f | 2601 | xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id, |
215a2dd3 | 2602 | delete, &err); |
1da177e4 LT |
2603 | if (xp == NULL) |
2604 | return -ENOENT; | |
2605 | ||
215a2dd3 | 2606 | if (delete) { |
ab5f5e8b JL |
2607 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2608 | audit_get_loginuid(current->audit_context), 0); | |
1da177e4 | 2609 | |
215a2dd3 EP |
2610 | if (err) |
2611 | goto out; | |
2612 | c.seq = hdr->sadb_msg_seq; | |
2613 | c.pid = hdr->sadb_msg_pid; | |
bf08867f | 2614 | c.data.byid = 1; |
f60f6b8f | 2615 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2616 | km_policy_notify(xp, dir, &c); |
26b15dad | 2617 | } else { |
77d8d7a6 | 2618 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2619 | } |
1da177e4 | 2620 | |
215a2dd3 | 2621 | out: |
1da177e4 LT |
2622 | xfrm_pol_put(xp); |
2623 | return err; | |
2624 | } | |
2625 | ||
2626 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2627 | { | |
2628 | struct pfkey_dump_data *data = ptr; | |
2629 | struct sk_buff *out_skb; | |
2630 | struct sadb_msg *out_hdr; | |
55569ce2 | 2631 | int err; |
1da177e4 LT |
2632 | |
2633 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2634 | if (IS_ERR(out_skb)) | |
2635 | return PTR_ERR(out_skb); | |
2636 | ||
55569ce2 KM |
2637 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2638 | if (err < 0) | |
2639 | return err; | |
1da177e4 LT |
2640 | |
2641 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2642 | out_hdr->sadb_msg_version = data->hdr->sadb_msg_version; | |
2643 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; | |
2644 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2645 | out_hdr->sadb_msg_errno = 0; | |
2646 | out_hdr->sadb_msg_seq = count; | |
2647 | out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid; | |
2648 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk); | |
2649 | return 0; | |
2650 | } | |
2651 | ||
2652 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2653 | { | |
2654 | struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk }; | |
2655 | ||
f7b6983f | 2656 | return xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_sp, &data); |
1da177e4 LT |
2657 | } |
2658 | ||
26b15dad | 2659 | static int key_notify_policy_flush(struct km_event *c) |
1da177e4 LT |
2660 | { |
2661 | struct sk_buff *skb_out; | |
26b15dad | 2662 | struct sadb_msg *hdr; |
1da177e4 | 2663 | |
26b15dad | 2664 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2665 | if (!skb_out) |
2666 | return -ENOBUFS; | |
26b15dad | 2667 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2668 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad JHS |
2669 | hdr->sadb_msg_seq = c->seq; |
2670 | hdr->sadb_msg_pid = c->pid; | |
2671 | hdr->sadb_msg_version = PF_KEY_V2; | |
2672 | hdr->sadb_msg_errno = (uint8_t) 0; | |
2673 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
2674 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2675 | return 0; | |
1da177e4 | 2676 | |
26b15dad JHS |
2677 | } |
2678 | ||
2679 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2680 | { | |
2681 | struct km_event c; | |
161a09e7 | 2682 | struct xfrm_audit audit_info; |
4aa2e62c | 2683 | int err; |
1da177e4 | 2684 | |
161a09e7 JL |
2685 | audit_info.loginuid = audit_get_loginuid(current->audit_context); |
2686 | audit_info.secid = 0; | |
4aa2e62c JL |
2687 | err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info); |
2688 | if (err) | |
2689 | return err; | |
f7b6983f | 2690 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2691 | c.event = XFRM_MSG_FLUSHPOLICY; |
26b15dad JHS |
2692 | c.pid = hdr->sadb_msg_pid; |
2693 | c.seq = hdr->sadb_msg_seq; | |
2694 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
2695 | |
2696 | return 0; | |
2697 | } | |
2698 | ||
2699 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
2700 | struct sadb_msg *hdr, void **ext_hdrs); | |
2701 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { | |
2702 | [SADB_RESERVED] = pfkey_reserved, | |
2703 | [SADB_GETSPI] = pfkey_getspi, | |
2704 | [SADB_UPDATE] = pfkey_add, | |
2705 | [SADB_ADD] = pfkey_add, | |
2706 | [SADB_DELETE] = pfkey_delete, | |
2707 | [SADB_GET] = pfkey_get, | |
2708 | [SADB_ACQUIRE] = pfkey_acquire, | |
2709 | [SADB_REGISTER] = pfkey_register, | |
2710 | [SADB_EXPIRE] = NULL, | |
2711 | [SADB_FLUSH] = pfkey_flush, | |
2712 | [SADB_DUMP] = pfkey_dump, | |
2713 | [SADB_X_PROMISC] = pfkey_promisc, | |
2714 | [SADB_X_PCHANGE] = NULL, | |
2715 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2716 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2717 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2718 | [SADB_X_SPDGET] = pfkey_spdget, | |
2719 | [SADB_X_SPDACQUIRE] = NULL, | |
2720 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2721 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2722 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2723 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2724 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2725 | }; |
2726 | ||
2727 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) | |
2728 | { | |
2729 | void *ext_hdrs[SADB_EXT_MAX]; | |
2730 | int err; | |
2731 | ||
2732 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
2733 | BROADCAST_PROMISC_ONLY, NULL); | |
2734 | ||
2735 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2736 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2737 | if (!err) { | |
2738 | err = -EOPNOTSUPP; | |
2739 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2740 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2741 | } | |
2742 | return err; | |
2743 | } | |
2744 | ||
2745 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2746 | { | |
2747 | struct sadb_msg *hdr = NULL; | |
2748 | ||
2749 | if (skb->len < sizeof(*hdr)) { | |
2750 | *errp = -EMSGSIZE; | |
2751 | } else { | |
2752 | hdr = (struct sadb_msg *) skb->data; | |
2753 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2754 | hdr->sadb_msg_reserved != 0 || | |
2755 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2756 | hdr->sadb_msg_type > SADB_MAX)) { | |
2757 | hdr = NULL; | |
2758 | *errp = -EINVAL; | |
2759 | } else if (hdr->sadb_msg_len != (skb->len / | |
2760 | sizeof(uint64_t)) || | |
2761 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2762 | sizeof(uint64_t))) { | |
2763 | hdr = NULL; | |
2764 | *errp = -EMSGSIZE; | |
2765 | } else { | |
2766 | *errp = 0; | |
2767 | } | |
2768 | } | |
2769 | return hdr; | |
2770 | } | |
2771 | ||
2772 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2773 | { | |
2774 | return t->aalgos & (1 << d->desc.sadb_alg_id); | |
2775 | } | |
2776 | ||
2777 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2778 | { | |
2779 | return t->ealgos & (1 << d->desc.sadb_alg_id); | |
2780 | } | |
2781 | ||
2782 | static int count_ah_combs(struct xfrm_tmpl *t) | |
2783 | { | |
2784 | int i, sz = 0; | |
2785 | ||
2786 | for (i = 0; ; i++) { | |
2787 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2788 | if (!aalg) | |
2789 | break; | |
2790 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2791 | sz += sizeof(struct sadb_comb); | |
2792 | } | |
2793 | return sz + sizeof(struct sadb_prop); | |
2794 | } | |
2795 | ||
2796 | static int count_esp_combs(struct xfrm_tmpl *t) | |
2797 | { | |
2798 | int i, k, sz = 0; | |
2799 | ||
2800 | for (i = 0; ; i++) { | |
2801 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2802 | if (!ealg) | |
2803 | break; | |
8ff24541 | 2804 | |
1da177e4 LT |
2805 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2806 | continue; | |
8ff24541 | 2807 | |
1da177e4 LT |
2808 | for (k = 1; ; k++) { |
2809 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2810 | if (!aalg) | |
2811 | break; | |
8ff24541 | 2812 | |
1da177e4 LT |
2813 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2814 | sz += sizeof(struct sadb_comb); | |
2815 | } | |
2816 | } | |
2817 | return sz + sizeof(struct sadb_prop); | |
2818 | } | |
2819 | ||
2820 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2821 | { | |
2822 | struct sadb_prop *p; | |
2823 | int i; | |
2824 | ||
2825 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2826 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2827 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2828 | p->sadb_prop_replay = 32; | |
2829 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2830 | ||
2831 | for (i = 0; ; i++) { | |
2832 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2833 | if (!aalg) | |
2834 | break; | |
2835 | ||
2836 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | |
2837 | struct sadb_comb *c; | |
2838 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2839 | memset(c, 0, sizeof(*c)); | |
2840 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2841 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2842 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2843 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2844 | c->sadb_comb_hard_addtime = 24*60*60; | |
2845 | c->sadb_comb_soft_addtime = 20*60*60; | |
2846 | c->sadb_comb_hard_usetime = 8*60*60; | |
2847 | c->sadb_comb_soft_usetime = 7*60*60; | |
2848 | } | |
2849 | } | |
2850 | } | |
2851 | ||
2852 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2853 | { | |
2854 | struct sadb_prop *p; | |
2855 | int i, k; | |
2856 | ||
2857 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2858 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2859 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2860 | p->sadb_prop_replay = 32; | |
2861 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2862 | ||
2863 | for (i=0; ; i++) { | |
2864 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2865 | if (!ealg) | |
2866 | break; | |
8ff24541 | 2867 | |
1da177e4 LT |
2868 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2869 | continue; | |
8ff24541 | 2870 | |
1da177e4 LT |
2871 | for (k = 1; ; k++) { |
2872 | struct sadb_comb *c; | |
2873 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2874 | if (!aalg) | |
2875 | break; | |
2876 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | |
2877 | continue; | |
2878 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2879 | memset(c, 0, sizeof(*c)); | |
2880 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2881 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2882 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2883 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2884 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2885 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2886 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2887 | c->sadb_comb_hard_addtime = 24*60*60; | |
2888 | c->sadb_comb_soft_addtime = 20*60*60; | |
2889 | c->sadb_comb_hard_usetime = 8*60*60; | |
2890 | c->sadb_comb_soft_usetime = 7*60*60; | |
2891 | } | |
2892 | } | |
2893 | } | |
2894 | ||
26b15dad JHS |
2895 | static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) |
2896 | { | |
2897 | return 0; | |
2898 | } | |
2899 | ||
2900 | static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) | |
1da177e4 LT |
2901 | { |
2902 | struct sk_buff *out_skb; | |
2903 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2904 | int hard; |
2905 | int hsc; | |
2906 | ||
bf08867f | 2907 | hard = c->data.hard; |
26b15dad JHS |
2908 | if (hard) |
2909 | hsc = 2; | |
2910 | else | |
2911 | hsc = 1; | |
1da177e4 LT |
2912 | |
2913 | out_skb = pfkey_xfrm_state2msg(x, 0, hsc); | |
2914 | if (IS_ERR(out_skb)) | |
2915 | return PTR_ERR(out_skb); | |
2916 | ||
2917 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2918 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2919 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
2920 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2921 | out_hdr->sadb_msg_errno = 0; | |
2922 | out_hdr->sadb_msg_reserved = 0; | |
2923 | out_hdr->sadb_msg_seq = 0; | |
2924 | out_hdr->sadb_msg_pid = 0; | |
2925 | ||
2926 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
2927 | return 0; | |
2928 | } | |
2929 | ||
26b15dad JHS |
2930 | static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) |
2931 | { | |
2932 | switch (c->event) { | |
f60f6b8f | 2933 | case XFRM_MSG_EXPIRE: |
26b15dad | 2934 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
2935 | case XFRM_MSG_DELSA: |
2936 | case XFRM_MSG_NEWSA: | |
2937 | case XFRM_MSG_UPDSA: | |
26b15dad | 2938 | return key_notify_sa(x, c); |
f60f6b8f | 2939 | case XFRM_MSG_FLUSHSA: |
26b15dad | 2940 | return key_notify_sa_flush(c); |
d51d081d JHS |
2941 | case XFRM_MSG_NEWAE: /* not yet supported */ |
2942 | break; | |
26b15dad JHS |
2943 | default: |
2944 | printk("pfkey: Unknown SA event %d\n", c->event); | |
2945 | break; | |
2946 | } | |
2947 | ||
2948 | return 0; | |
2949 | } | |
2950 | ||
2951 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2952 | { | |
f7b6983f MN |
2953 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
2954 | return 0; | |
2955 | ||
26b15dad | 2956 | switch (c->event) { |
f60f6b8f | 2957 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 2958 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
2959 | case XFRM_MSG_DELPOLICY: |
2960 | case XFRM_MSG_NEWPOLICY: | |
2961 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 2962 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 2963 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
2964 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
2965 | break; | |
26b15dad JHS |
2966 | return key_notify_policy_flush(c); |
2967 | default: | |
2968 | printk("pfkey: Unknown policy event %d\n", c->event); | |
2969 | break; | |
2970 | } | |
2971 | ||
2972 | return 0; | |
2973 | } | |
2974 | ||
1da177e4 LT |
2975 | static u32 get_acqseq(void) |
2976 | { | |
2977 | u32 res; | |
2978 | static u32 acqseq; | |
2979 | static DEFINE_SPINLOCK(acqseq_lock); | |
2980 | ||
2981 | spin_lock_bh(&acqseq_lock); | |
2982 | res = (++acqseq ? : ++acqseq); | |
2983 | spin_unlock_bh(&acqseq_lock); | |
2984 | return res; | |
2985 | } | |
2986 | ||
2987 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | |
2988 | { | |
2989 | struct sk_buff *skb; | |
2990 | struct sadb_msg *hdr; | |
2991 | struct sadb_address *addr; | |
2992 | struct sadb_x_policy *pol; | |
2993 | struct sockaddr_in *sin; | |
2994 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2995 | struct sockaddr_in6 *sin6; | |
2996 | #endif | |
2997 | int sockaddr_size; | |
2998 | int size; | |
4e2ba18e VY |
2999 | struct sadb_x_sec_ctx *sec_ctx; |
3000 | struct xfrm_sec_ctx *xfrm_ctx; | |
3001 | int ctx_size = 0; | |
8ff24541 | 3002 | |
1da177e4 LT |
3003 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3004 | if (!sockaddr_size) | |
3005 | return -EINVAL; | |
3006 | ||
3007 | size = sizeof(struct sadb_msg) + | |
3008 | (sizeof(struct sadb_address) * 2) + | |
3009 | (sockaddr_size * 2) + | |
3010 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3011 | |
1da177e4 LT |
3012 | if (x->id.proto == IPPROTO_AH) |
3013 | size += count_ah_combs(t); | |
3014 | else if (x->id.proto == IPPROTO_ESP) | |
3015 | size += count_esp_combs(t); | |
3016 | ||
4e2ba18e VY |
3017 | if ((xfrm_ctx = x->security)) { |
3018 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3019 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3020 | } | |
3021 | ||
1da177e4 LT |
3022 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3023 | if (skb == NULL) | |
3024 | return -ENOMEM; | |
8ff24541 | 3025 | |
1da177e4 LT |
3026 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3027 | hdr->sadb_msg_version = PF_KEY_V2; | |
3028 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3029 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3030 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3031 | hdr->sadb_msg_errno = 0; | |
3032 | hdr->sadb_msg_reserved = 0; | |
3033 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3034 | hdr->sadb_msg_pid = 0; | |
3035 | ||
3036 | /* src address */ | |
8ff24541 | 3037 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 3038 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 3039 | addr->sadb_address_len = |
1da177e4 LT |
3040 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3041 | sizeof(uint64_t); | |
3042 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3043 | addr->sadb_address_proto = 0; | |
3044 | addr->sadb_address_reserved = 0; | |
3045 | if (x->props.family == AF_INET) { | |
3046 | addr->sadb_address_prefixlen = 32; | |
3047 | ||
3048 | sin = (struct sockaddr_in *) (addr + 1); | |
3049 | sin->sin_family = AF_INET; | |
3050 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
3051 | sin->sin_port = 0; | |
3052 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3053 | } | |
3054 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3055 | else if (x->props.family == AF_INET6) { | |
3056 | addr->sadb_address_prefixlen = 128; | |
3057 | ||
3058 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3059 | sin6->sin6_family = AF_INET6; | |
3060 | sin6->sin6_port = 0; | |
3061 | sin6->sin6_flowinfo = 0; | |
3062 | memcpy(&sin6->sin6_addr, | |
3063 | x->props.saddr.a6, sizeof(struct in6_addr)); | |
3064 | sin6->sin6_scope_id = 0; | |
3065 | } | |
3066 | #endif | |
3067 | else | |
3068 | BUG(); | |
8ff24541 | 3069 | |
1da177e4 | 3070 | /* dst address */ |
8ff24541 | 3071 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
3072 | sizeof(struct sadb_address)+sockaddr_size); |
3073 | addr->sadb_address_len = | |
3074 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3075 | sizeof(uint64_t); | |
3076 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3077 | addr->sadb_address_proto = 0; | |
3078 | addr->sadb_address_reserved = 0; | |
3079 | if (x->props.family == AF_INET) { | |
8ff24541 | 3080 | addr->sadb_address_prefixlen = 32; |
1da177e4 LT |
3081 | |
3082 | sin = (struct sockaddr_in *) (addr + 1); | |
3083 | sin->sin_family = AF_INET; | |
3084 | sin->sin_addr.s_addr = x->id.daddr.a4; | |
3085 | sin->sin_port = 0; | |
3086 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3087 | } | |
3088 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3089 | else if (x->props.family == AF_INET6) { | |
8ff24541 | 3090 | addr->sadb_address_prefixlen = 128; |
1da177e4 LT |
3091 | |
3092 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3093 | sin6->sin6_family = AF_INET6; | |
3094 | sin6->sin6_port = 0; | |
3095 | sin6->sin6_flowinfo = 0; | |
3096 | memcpy(&sin6->sin6_addr, | |
3097 | x->id.daddr.a6, sizeof(struct in6_addr)); | |
3098 | sin6->sin6_scope_id = 0; | |
3099 | } | |
3100 | #endif | |
3101 | else | |
3102 | BUG(); | |
3103 | ||
3104 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
3105 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
3106 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3107 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3108 | pol->sadb_x_policy_dir = dir+1; | |
3109 | pol->sadb_x_policy_id = xp->index; | |
3110 | ||
3111 | /* Set sadb_comb's. */ | |
3112 | if (x->id.proto == IPPROTO_AH) | |
3113 | dump_ah_combs(skb, t); | |
3114 | else if (x->id.proto == IPPROTO_ESP) | |
3115 | dump_esp_combs(skb, t); | |
3116 | ||
4e2ba18e VY |
3117 | /* security context */ |
3118 | if (xfrm_ctx) { | |
3119 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
3120 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
3121 | sec_ctx->sadb_x_sec_len = | |
3122 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3123 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3124 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3125 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3126 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3127 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3128 | xfrm_ctx->ctx_len); | |
3129 | } | |
3130 | ||
1da177e4 LT |
3131 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); |
3132 | } | |
3133 | ||
cb969f07 | 3134 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3135 | u8 *data, int len, int *dir) |
1da177e4 LT |
3136 | { |
3137 | struct xfrm_policy *xp; | |
3138 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3139 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3140 | |
cb969f07 | 3141 | switch (sk->sk_family) { |
1da177e4 LT |
3142 | case AF_INET: |
3143 | if (opt != IP_IPSEC_POLICY) { | |
3144 | *dir = -EOPNOTSUPP; | |
3145 | return NULL; | |
3146 | } | |
3147 | break; | |
3148 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3149 | case AF_INET6: | |
3150 | if (opt != IPV6_IPSEC_POLICY) { | |
3151 | *dir = -EOPNOTSUPP; | |
3152 | return NULL; | |
3153 | } | |
3154 | break; | |
3155 | #endif | |
3156 | default: | |
3157 | *dir = -EINVAL; | |
3158 | return NULL; | |
3159 | } | |
3160 | ||
3161 | *dir = -EINVAL; | |
3162 | ||
3163 | if (len < sizeof(struct sadb_x_policy) || | |
3164 | pol->sadb_x_policy_len*8 > len || | |
3165 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3166 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3167 | return NULL; | |
3168 | ||
3169 | xp = xfrm_policy_alloc(GFP_ATOMIC); | |
3170 | if (xp == NULL) { | |
3171 | *dir = -ENOBUFS; | |
3172 | return NULL; | |
3173 | } | |
3174 | ||
3175 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3176 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3177 | ||
3178 | xp->lft.soft_byte_limit = XFRM_INF; | |
3179 | xp->lft.hard_byte_limit = XFRM_INF; | |
3180 | xp->lft.soft_packet_limit = XFRM_INF; | |
3181 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3182 | xp->family = sk->sk_family; |
1da177e4 LT |
3183 | |
3184 | xp->xfrm_nr = 0; | |
3185 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3186 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3187 | goto out; | |
3188 | ||
df71837d TJ |
3189 | /* security context too */ |
3190 | if (len >= (pol->sadb_x_policy_len*8 + | |
3191 | sizeof(struct sadb_x_sec_ctx))) { | |
3192 | char *p = (char *)pol; | |
3193 | struct xfrm_user_sec_ctx *uctx; | |
3194 | ||
3195 | p += pol->sadb_x_policy_len*8; | |
3196 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3197 | if (len < pol->sadb_x_policy_len*8 + | |
cb969f07 VY |
3198 | sec_ctx->sadb_x_sec_len) { |
3199 | *dir = -EINVAL; | |
df71837d | 3200 | goto out; |
cb969f07 | 3201 | } |
df71837d TJ |
3202 | if ((*dir = verify_sec_ctx_len(p))) |
3203 | goto out; | |
3204 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
3205 | *dir = security_xfrm_policy_alloc(xp, uctx); | |
3206 | kfree(uctx); | |
3207 | ||
3208 | if (*dir) | |
3209 | goto out; | |
3210 | } | |
3211 | ||
1da177e4 LT |
3212 | *dir = pol->sadb_x_policy_dir-1; |
3213 | return xp; | |
3214 | ||
3215 | out: | |
df71837d | 3216 | security_xfrm_policy_free(xp); |
1da177e4 LT |
3217 | kfree(xp); |
3218 | return NULL; | |
3219 | } | |
3220 | ||
5d36b180 | 3221 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3222 | { |
3223 | struct sk_buff *skb; | |
3224 | struct sadb_msg *hdr; | |
3225 | struct sadb_sa *sa; | |
3226 | struct sadb_address *addr; | |
3227 | struct sadb_x_nat_t_port *n_port; | |
3228 | struct sockaddr_in *sin; | |
3229 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3230 | struct sockaddr_in6 *sin6; | |
3231 | #endif | |
3232 | int sockaddr_size; | |
3233 | int size; | |
3234 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3235 | struct xfrm_encap_tmpl *natt = NULL; | |
3236 | ||
3237 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3238 | if (!sockaddr_size) | |
3239 | return -EINVAL; | |
3240 | ||
3241 | if (!satype) | |
3242 | return -EINVAL; | |
3243 | ||
3244 | if (!x->encap) | |
3245 | return -EINVAL; | |
3246 | ||
3247 | natt = x->encap; | |
3248 | ||
3249 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3250 | * | |
3251 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3252 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3253 | */ | |
8ff24541 | 3254 | |
1da177e4 LT |
3255 | size = sizeof(struct sadb_msg) + |
3256 | sizeof(struct sadb_sa) + | |
3257 | (sizeof(struct sadb_address) * 2) + | |
3258 | (sockaddr_size * 2) + | |
3259 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3260 | |
1da177e4 LT |
3261 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3262 | if (skb == NULL) | |
3263 | return -ENOMEM; | |
8ff24541 | 3264 | |
1da177e4 LT |
3265 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3266 | hdr->sadb_msg_version = PF_KEY_V2; | |
3267 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3268 | hdr->sadb_msg_satype = satype; | |
3269 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3270 | hdr->sadb_msg_errno = 0; | |
3271 | hdr->sadb_msg_reserved = 0; | |
3272 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3273 | hdr->sadb_msg_pid = 0; | |
3274 | ||
3275 | /* SA */ | |
3276 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
3277 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
3278 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3279 | sa->sadb_sa_spi = x->id.spi; | |
3280 | sa->sadb_sa_replay = 0; | |
3281 | sa->sadb_sa_state = 0; | |
3282 | sa->sadb_sa_auth = 0; | |
3283 | sa->sadb_sa_encrypt = 0; | |
3284 | sa->sadb_sa_flags = 0; | |
3285 | ||
3286 | /* ADDRESS_SRC (old addr) */ | |
3287 | addr = (struct sadb_address*) | |
3288 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3289 | addr->sadb_address_len = |
1da177e4 LT |
3290 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3291 | sizeof(uint64_t); | |
3292 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3293 | addr->sadb_address_proto = 0; | |
3294 | addr->sadb_address_reserved = 0; | |
3295 | if (x->props.family == AF_INET) { | |
3296 | addr->sadb_address_prefixlen = 32; | |
3297 | ||
3298 | sin = (struct sockaddr_in *) (addr + 1); | |
3299 | sin->sin_family = AF_INET; | |
3300 | sin->sin_addr.s_addr = x->props.saddr.a4; | |
3301 | sin->sin_port = 0; | |
3302 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3303 | } | |
3304 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3305 | else if (x->props.family == AF_INET6) { | |
3306 | addr->sadb_address_prefixlen = 128; | |
3307 | ||
3308 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3309 | sin6->sin6_family = AF_INET6; | |
3310 | sin6->sin6_port = 0; | |
3311 | sin6->sin6_flowinfo = 0; | |
3312 | memcpy(&sin6->sin6_addr, | |
3313 | x->props.saddr.a6, sizeof(struct in6_addr)); | |
3314 | sin6->sin6_scope_id = 0; | |
3315 | } | |
3316 | #endif | |
3317 | else | |
3318 | BUG(); | |
3319 | ||
3320 | /* NAT_T_SPORT (old port) */ | |
3321 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3322 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3323 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3324 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3325 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3326 | ||
3327 | /* ADDRESS_DST (new addr) */ | |
3328 | addr = (struct sadb_address*) | |
3329 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3330 | addr->sadb_address_len = |
1da177e4 LT |
3331 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3332 | sizeof(uint64_t); | |
3333 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3334 | addr->sadb_address_proto = 0; | |
3335 | addr->sadb_address_reserved = 0; | |
3336 | if (x->props.family == AF_INET) { | |
3337 | addr->sadb_address_prefixlen = 32; | |
3338 | ||
3339 | sin = (struct sockaddr_in *) (addr + 1); | |
3340 | sin->sin_family = AF_INET; | |
3341 | sin->sin_addr.s_addr = ipaddr->a4; | |
3342 | sin->sin_port = 0; | |
3343 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3344 | } | |
3345 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3346 | else if (x->props.family == AF_INET6) { | |
3347 | addr->sadb_address_prefixlen = 128; | |
3348 | ||
3349 | sin6 = (struct sockaddr_in6 *) (addr + 1); | |
3350 | sin6->sin6_family = AF_INET6; | |
3351 | sin6->sin6_port = 0; | |
3352 | sin6->sin6_flowinfo = 0; | |
3353 | memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr)); | |
3354 | sin6->sin6_scope_id = 0; | |
3355 | } | |
3356 | #endif | |
3357 | else | |
3358 | BUG(); | |
3359 | ||
3360 | /* NAT_T_DPORT (new port) */ | |
3361 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3362 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3363 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3364 | n_port->sadb_x_nat_t_port_port = sport; | |
3365 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3366 | ||
3367 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
3368 | } | |
3369 | ||
08de61be SS |
3370 | #ifdef CONFIG_NET_KEY_MIGRATE |
3371 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
3372 | struct xfrm_selector *sel) | |
3373 | { | |
3374 | struct sadb_address *addr; | |
3375 | struct sockaddr_in *sin; | |
3376 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3377 | struct sockaddr_in6 *sin6; | |
3378 | #endif | |
3379 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); | |
3380 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; | |
3381 | addr->sadb_address_exttype = type; | |
3382 | addr->sadb_address_proto = sel->proto; | |
3383 | addr->sadb_address_reserved = 0; | |
3384 | ||
3385 | switch (type) { | |
3386 | case SADB_EXT_ADDRESS_SRC: | |
3387 | if (sel->family == AF_INET) { | |
3388 | addr->sadb_address_prefixlen = sel->prefixlen_s; | |
3389 | sin = (struct sockaddr_in *)(addr + 1); | |
3390 | sin->sin_family = AF_INET; | |
3391 | memcpy(&sin->sin_addr.s_addr, &sel->saddr, | |
3392 | sizeof(sin->sin_addr.s_addr)); | |
3393 | sin->sin_port = 0; | |
3394 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3395 | } | |
3396 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3397 | else if (sel->family == AF_INET6) { | |
3398 | addr->sadb_address_prefixlen = sel->prefixlen_s; | |
3399 | sin6 = (struct sockaddr_in6 *)(addr + 1); | |
3400 | sin6->sin6_family = AF_INET6; | |
3401 | sin6->sin6_port = 0; | |
3402 | sin6->sin6_flowinfo = 0; | |
3403 | sin6->sin6_scope_id = 0; | |
3404 | memcpy(&sin6->sin6_addr.s6_addr, &sel->saddr, | |
3405 | sizeof(sin6->sin6_addr.s6_addr)); | |
3406 | } | |
3407 | #endif | |
3408 | break; | |
3409 | case SADB_EXT_ADDRESS_DST: | |
3410 | if (sel->family == AF_INET) { | |
3411 | addr->sadb_address_prefixlen = sel->prefixlen_d; | |
3412 | sin = (struct sockaddr_in *)(addr + 1); | |
3413 | sin->sin_family = AF_INET; | |
3414 | memcpy(&sin->sin_addr.s_addr, &sel->daddr, | |
3415 | sizeof(sin->sin_addr.s_addr)); | |
3416 | sin->sin_port = 0; | |
3417 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
3418 | } | |
3419 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3420 | else if (sel->family == AF_INET6) { | |
3421 | addr->sadb_address_prefixlen = sel->prefixlen_d; | |
3422 | sin6 = (struct sockaddr_in6 *)(addr + 1); | |
3423 | sin6->sin6_family = AF_INET6; | |
3424 | sin6->sin6_port = 0; | |
3425 | sin6->sin6_flowinfo = 0; | |
3426 | sin6->sin6_scope_id = 0; | |
3427 | memcpy(&sin6->sin6_addr.s6_addr, &sel->daddr, | |
3428 | sizeof(sin6->sin6_addr.s6_addr)); | |
3429 | } | |
3430 | #endif | |
3431 | break; | |
3432 | default: | |
3433 | return -EINVAL; | |
3434 | } | |
3435 | ||
3436 | return 0; | |
3437 | } | |
3438 | ||
3439 | static int set_ipsecrequest(struct sk_buff *skb, | |
3440 | uint8_t proto, uint8_t mode, int level, | |
3441 | uint32_t reqid, uint8_t family, | |
3442 | xfrm_address_t *src, xfrm_address_t *dst) | |
3443 | { | |
3444 | struct sadb_x_ipsecrequest *rq; | |
3445 | struct sockaddr_in *sin; | |
3446 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3447 | struct sockaddr_in6 *sin6; | |
3448 | #endif | |
3449 | int size_req; | |
3450 | ||
3451 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3452 | pfkey_sockaddr_pair_size(family); | |
3453 | ||
3454 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); | |
3455 | memset(rq, 0, size_req); | |
3456 | rq->sadb_x_ipsecrequest_len = size_req; | |
3457 | rq->sadb_x_ipsecrequest_proto = proto; | |
3458 | rq->sadb_x_ipsecrequest_mode = mode; | |
3459 | rq->sadb_x_ipsecrequest_level = level; | |
3460 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3461 | ||
3462 | switch (family) { | |
3463 | case AF_INET: | |
3464 | sin = (struct sockaddr_in *)(rq + 1); | |
3465 | sin->sin_family = AF_INET; | |
3466 | memcpy(&sin->sin_addr.s_addr, src, | |
3467 | sizeof(sin->sin_addr.s_addr)); | |
3468 | sin++; | |
3469 | sin->sin_family = AF_INET; | |
3470 | memcpy(&sin->sin_addr.s_addr, dst, | |
3471 | sizeof(sin->sin_addr.s_addr)); | |
3472 | break; | |
3473 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3474 | case AF_INET6: | |
3475 | sin6 = (struct sockaddr_in6 *)(rq + 1); | |
3476 | sin6->sin6_family = AF_INET6; | |
3477 | sin6->sin6_port = 0; | |
3478 | sin6->sin6_flowinfo = 0; | |
3479 | sin6->sin6_scope_id = 0; | |
3480 | memcpy(&sin6->sin6_addr.s6_addr, src, | |
3481 | sizeof(sin6->sin6_addr.s6_addr)); | |
3482 | sin6++; | |
3483 | sin6->sin6_family = AF_INET6; | |
3484 | sin6->sin6_port = 0; | |
3485 | sin6->sin6_flowinfo = 0; | |
3486 | sin6->sin6_scope_id = 0; | |
3487 | memcpy(&sin6->sin6_addr.s6_addr, dst, | |
3488 | sizeof(sin6->sin6_addr.s6_addr)); | |
3489 | break; | |
3490 | #endif | |
3491 | default: | |
3492 | return -EINVAL; | |
3493 | } | |
3494 | ||
3495 | return 0; | |
3496 | } | |
3497 | #endif | |
3498 | ||
3499 | #ifdef CONFIG_NET_KEY_MIGRATE | |
3500 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
3501 | struct xfrm_migrate *m, int num_bundles) | |
3502 | { | |
3503 | int i; | |
3504 | int sasize_sel; | |
3505 | int size = 0; | |
3506 | int size_pol = 0; | |
3507 | struct sk_buff *skb; | |
3508 | struct sadb_msg *hdr; | |
3509 | struct sadb_x_policy *pol; | |
3510 | struct xfrm_migrate *mp; | |
3511 | ||
3512 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3513 | return 0; | |
3514 | ||
3515 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3516 | return -EINVAL; | |
3517 | ||
3518 | /* selector */ | |
3519 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3520 | if (!sasize_sel) | |
3521 | return -EINVAL; | |
3522 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3523 | ||
3524 | /* policy info */ | |
3525 | size_pol += sizeof(struct sadb_x_policy); | |
3526 | ||
3527 | /* ipsecrequests */ | |
3528 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3529 | /* old locator pair */ | |
3530 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3531 | pfkey_sockaddr_pair_size(mp->old_family); | |
3532 | /* new locator pair */ | |
3533 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3534 | pfkey_sockaddr_pair_size(mp->new_family); | |
3535 | } | |
3536 | ||
3537 | size += sizeof(struct sadb_msg) + size_pol; | |
3538 | ||
3539 | /* alloc buffer */ | |
3540 | skb = alloc_skb(size, GFP_ATOMIC); | |
3541 | if (skb == NULL) | |
3542 | return -ENOMEM; | |
3543 | ||
3544 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); | |
3545 | hdr->sadb_msg_version = PF_KEY_V2; | |
3546 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3547 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3548 | hdr->sadb_msg_len = size / 8; | |
3549 | hdr->sadb_msg_errno = 0; | |
3550 | hdr->sadb_msg_reserved = 0; | |
3551 | hdr->sadb_msg_seq = 0; | |
3552 | hdr->sadb_msg_pid = 0; | |
3553 | ||
3554 | /* selector src */ | |
3555 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3556 | ||
3557 | /* selector dst */ | |
3558 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3559 | ||
3560 | /* policy information */ | |
3561 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); | |
3562 | pol->sadb_x_policy_len = size_pol / 8; | |
3563 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3564 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3565 | pol->sadb_x_policy_dir = dir + 1; | |
3566 | pol->sadb_x_policy_id = 0; | |
3567 | pol->sadb_x_policy_priority = 0; | |
3568 | ||
3569 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3570 | /* old ipsecrequest */ | |
55569ce2 KM |
3571 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3572 | if (mode < 0) | |
3573 | return -EINVAL; | |
3574 | if (set_ipsecrequest(skb, mp->proto, mode, | |
08de61be SS |
3575 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3576 | mp->reqid, mp->old_family, | |
3577 | &mp->old_saddr, &mp->old_daddr) < 0) { | |
3578 | return -EINVAL; | |
3579 | } | |
3580 | ||
3581 | /* new ipsecrequest */ | |
55569ce2 | 3582 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3583 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3584 | mp->reqid, mp->new_family, | |
3585 | &mp->new_saddr, &mp->new_daddr) < 0) { | |
3586 | return -EINVAL; | |
3587 | } | |
3588 | } | |
3589 | ||
3590 | /* broadcast migrate message to sockets */ | |
3591 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
3592 | ||
3593 | return 0; | |
3594 | } | |
3595 | #else | |
3596 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
3597 | struct xfrm_migrate *m, int num_bundles) | |
3598 | { | |
3599 | return -ENOPROTOOPT; | |
3600 | } | |
3601 | #endif | |
3602 | ||
1da177e4 LT |
3603 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3604 | struct socket *sock, struct msghdr *msg, size_t len) | |
3605 | { | |
3606 | struct sock *sk = sock->sk; | |
3607 | struct sk_buff *skb = NULL; | |
3608 | struct sadb_msg *hdr = NULL; | |
3609 | int err; | |
3610 | ||
3611 | err = -EOPNOTSUPP; | |
3612 | if (msg->msg_flags & MSG_OOB) | |
3613 | goto out; | |
3614 | ||
3615 | err = -EMSGSIZE; | |
3616 | if ((unsigned)len > sk->sk_sndbuf - 32) | |
3617 | goto out; | |
3618 | ||
3619 | err = -ENOBUFS; | |
3620 | skb = alloc_skb(len, GFP_KERNEL); | |
3621 | if (skb == NULL) | |
3622 | goto out; | |
3623 | ||
3624 | err = -EFAULT; | |
3625 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3626 | goto out; | |
3627 | ||
3628 | hdr = pfkey_get_base_msg(skb, &err); | |
3629 | if (!hdr) | |
3630 | goto out; | |
3631 | ||
4a3e2f71 | 3632 | mutex_lock(&xfrm_cfg_mutex); |
1da177e4 | 3633 | err = pfkey_process(sk, skb, hdr); |
4a3e2f71 | 3634 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 LT |
3635 | |
3636 | out: | |
3637 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3638 | err = 0; | |
3639 | if (skb) | |
3640 | kfree_skb(skb); | |
3641 | ||
3642 | return err ? : len; | |
3643 | } | |
3644 | ||
3645 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3646 | struct socket *sock, struct msghdr *msg, size_t len, | |
3647 | int flags) | |
3648 | { | |
3649 | struct sock *sk = sock->sk; | |
3650 | struct sk_buff *skb; | |
3651 | int copied, err; | |
3652 | ||
3653 | err = -EINVAL; | |
3654 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3655 | goto out; | |
3656 | ||
3657 | msg->msg_namelen = 0; | |
3658 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | |
3659 | if (skb == NULL) | |
3660 | goto out; | |
3661 | ||
3662 | copied = skb->len; | |
3663 | if (copied > len) { | |
3664 | msg->msg_flags |= MSG_TRUNC; | |
3665 | copied = len; | |
3666 | } | |
3667 | ||
badff6d0 | 3668 | skb_reset_transport_header(skb); |
1da177e4 LT |
3669 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3670 | if (err) | |
3671 | goto out_free; | |
3672 | ||
3673 | sock_recv_timestamp(msg, sk, skb); | |
3674 | ||
3675 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3676 | ||
3677 | out_free: | |
3678 | skb_free_datagram(sk, skb); | |
3679 | out: | |
3680 | return err; | |
3681 | } | |
3682 | ||
90ddc4f0 | 3683 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3684 | .family = PF_KEY, |
3685 | .owner = THIS_MODULE, | |
3686 | /* Operations that make no sense on pfkey sockets. */ | |
3687 | .bind = sock_no_bind, | |
3688 | .connect = sock_no_connect, | |
3689 | .socketpair = sock_no_socketpair, | |
3690 | .accept = sock_no_accept, | |
3691 | .getname = sock_no_getname, | |
3692 | .ioctl = sock_no_ioctl, | |
3693 | .listen = sock_no_listen, | |
3694 | .shutdown = sock_no_shutdown, | |
3695 | .setsockopt = sock_no_setsockopt, | |
3696 | .getsockopt = sock_no_getsockopt, | |
3697 | .mmap = sock_no_mmap, | |
3698 | .sendpage = sock_no_sendpage, | |
3699 | ||
3700 | /* Now the operations that really occur. */ | |
3701 | .release = pfkey_release, | |
3702 | .poll = datagram_poll, | |
3703 | .sendmsg = pfkey_sendmsg, | |
3704 | .recvmsg = pfkey_recvmsg, | |
3705 | }; | |
3706 | ||
3707 | static struct net_proto_family pfkey_family_ops = { | |
3708 | .family = PF_KEY, | |
3709 | .create = pfkey_create, | |
3710 | .owner = THIS_MODULE, | |
3711 | }; | |
3712 | ||
3713 | #ifdef CONFIG_PROC_FS | |
3714 | static int pfkey_read_proc(char *buffer, char **start, off_t offset, | |
3715 | int length, int *eof, void *data) | |
3716 | { | |
3717 | off_t pos = 0; | |
3718 | off_t begin = 0; | |
3719 | int len = 0; | |
3720 | struct sock *s; | |
3721 | struct hlist_node *node; | |
3722 | ||
3723 | len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n"); | |
3724 | ||
3725 | read_lock(&pfkey_table_lock); | |
3726 | ||
3727 | sk_for_each(s, node, &pfkey_table) { | |
3728 | len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu", | |
3729 | s, | |
3730 | atomic_read(&s->sk_refcnt), | |
3731 | atomic_read(&s->sk_rmem_alloc), | |
3732 | atomic_read(&s->sk_wmem_alloc), | |
3733 | sock_i_uid(s), | |
3734 | sock_i_ino(s) | |
3735 | ); | |
3736 | ||
3737 | buffer[len++] = '\n'; | |
8ff24541 | 3738 | |
1da177e4 LT |
3739 | pos = begin + len; |
3740 | if (pos < offset) { | |
3741 | len = 0; | |
3742 | begin = pos; | |
3743 | } | |
3744 | if(pos > offset + length) | |
3745 | goto done; | |
3746 | } | |
3747 | *eof = 1; | |
3748 | ||
3749 | done: | |
3750 | read_unlock(&pfkey_table_lock); | |
3751 | ||
3752 | *start = buffer + (offset - begin); | |
3753 | len -= (offset - begin); | |
3754 | ||
3755 | if (len > length) | |
3756 | len = length; | |
3757 | if (len < 0) | |
3758 | len = 0; | |
3759 | ||
3760 | return len; | |
3761 | } | |
3762 | #endif | |
3763 | ||
3764 | static struct xfrm_mgr pfkeyv2_mgr = | |
3765 | { | |
3766 | .id = "pfkeyv2", | |
3767 | .notify = pfkey_send_notify, | |
3768 | .acquire = pfkey_send_acquire, | |
3769 | .compile_policy = pfkey_compile_policy, | |
3770 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3771 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3772 | .migrate = pfkey_send_migrate, |
1da177e4 LT |
3773 | }; |
3774 | ||
3775 | static void __exit ipsec_pfkey_exit(void) | |
3776 | { | |
3777 | xfrm_unregister_km(&pfkeyv2_mgr); | |
457c4cbc | 3778 | remove_proc_entry("pfkey", init_net.proc_net); |
1da177e4 LT |
3779 | sock_unregister(PF_KEY); |
3780 | proto_unregister(&key_proto); | |
3781 | } | |
3782 | ||
3783 | static int __init ipsec_pfkey_init(void) | |
3784 | { | |
3785 | int err = proto_register(&key_proto, 0); | |
3786 | ||
3787 | if (err != 0) | |
3788 | goto out; | |
3789 | ||
3790 | err = sock_register(&pfkey_family_ops); | |
3791 | if (err != 0) | |
3792 | goto out_unregister_key_proto; | |
3793 | #ifdef CONFIG_PROC_FS | |
3794 | err = -ENOMEM; | |
457c4cbc | 3795 | if (create_proc_read_entry("pfkey", 0, init_net.proc_net, pfkey_read_proc, NULL) == NULL) |
1da177e4 LT |
3796 | goto out_sock_unregister; |
3797 | #endif | |
3798 | err = xfrm_register_km(&pfkeyv2_mgr); | |
3799 | if (err != 0) | |
3800 | goto out_remove_proc_entry; | |
3801 | out: | |
3802 | return err; | |
3803 | out_remove_proc_entry: | |
3804 | #ifdef CONFIG_PROC_FS | |
3805 | remove_proc_entry("net/pfkey", NULL); | |
3806 | out_sock_unregister: | |
3807 | #endif | |
3808 | sock_unregister(PF_KEY); | |
3809 | out_unregister_key_proto: | |
3810 | proto_unregister(&key_proto); | |
3811 | goto out; | |
3812 | } | |
3813 | ||
3814 | module_init(ipsec_pfkey_init); | |
3815 | module_exit(ipsec_pfkey_exit); | |
3816 | MODULE_LICENSE("GPL"); | |
3817 | MODULE_ALIAS_NETPROTO(PF_KEY); |