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; | |
83321d6b TT |
51 | |
52 | struct { | |
53 | uint8_t msg_version; | |
54 | uint32_t msg_pid; | |
55 | int (*dump)(struct pfkey_sock *sk); | |
56 | void (*done)(struct pfkey_sock *sk); | |
57 | union { | |
58 | struct xfrm_policy_walk policy; | |
59 | struct xfrm_state_walk state; | |
60 | } u; | |
12a169e7 | 61 | struct sk_buff *skb; |
83321d6b | 62 | } dump; |
1da177e4 LT |
63 | }; |
64 | ||
65 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) | |
66 | { | |
67 | return (struct pfkey_sock *)sk; | |
68 | } | |
69 | ||
83321d6b TT |
70 | static int pfkey_can_dump(struct sock *sk) |
71 | { | |
72 | if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) | |
73 | return 1; | |
74 | return 0; | |
75 | } | |
76 | ||
05238204 | 77 | static void pfkey_terminate_dump(struct pfkey_sock *pfk) |
83321d6b | 78 | { |
05238204 | 79 | if (pfk->dump.dump) { |
12a169e7 HX |
80 | if (pfk->dump.skb) { |
81 | kfree_skb(pfk->dump.skb); | |
82 | pfk->dump.skb = NULL; | |
83 | } | |
05238204 TT |
84 | pfk->dump.done(pfk); |
85 | pfk->dump.dump = NULL; | |
86 | pfk->dump.done = NULL; | |
87 | } | |
83321d6b TT |
88 | } |
89 | ||
1da177e4 LT |
90 | static void pfkey_sock_destruct(struct sock *sk) |
91 | { | |
05238204 | 92 | pfkey_terminate_dump(pfkey_sk(sk)); |
1da177e4 LT |
93 | skb_queue_purge(&sk->sk_receive_queue); |
94 | ||
95 | if (!sock_flag(sk, SOCK_DEAD)) { | |
96 | printk("Attempt to release alive pfkey socket: %p\n", sk); | |
97 | return; | |
98 | } | |
99 | ||
547b792c IJ |
100 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
101 | WARN_ON(atomic_read(&sk->sk_wmem_alloc)); | |
1da177e4 LT |
102 | |
103 | atomic_dec(&pfkey_socks_nr); | |
104 | } | |
105 | ||
106 | static void pfkey_table_grab(void) | |
107 | { | |
108 | write_lock_bh(&pfkey_table_lock); | |
109 | ||
110 | if (atomic_read(&pfkey_table_users)) { | |
111 | DECLARE_WAITQUEUE(wait, current); | |
112 | ||
113 | add_wait_queue_exclusive(&pfkey_table_wait, &wait); | |
114 | for(;;) { | |
115 | set_current_state(TASK_UNINTERRUPTIBLE); | |
116 | if (atomic_read(&pfkey_table_users) == 0) | |
117 | break; | |
118 | write_unlock_bh(&pfkey_table_lock); | |
119 | schedule(); | |
120 | write_lock_bh(&pfkey_table_lock); | |
121 | } | |
122 | ||
123 | __set_current_state(TASK_RUNNING); | |
124 | remove_wait_queue(&pfkey_table_wait, &wait); | |
125 | } | |
126 | } | |
127 | ||
128 | static __inline__ void pfkey_table_ungrab(void) | |
129 | { | |
130 | write_unlock_bh(&pfkey_table_lock); | |
131 | wake_up(&pfkey_table_wait); | |
132 | } | |
133 | ||
134 | static __inline__ void pfkey_lock_table(void) | |
135 | { | |
136 | /* read_lock() synchronizes us to pfkey_table_grab */ | |
137 | ||
138 | read_lock(&pfkey_table_lock); | |
139 | atomic_inc(&pfkey_table_users); | |
140 | read_unlock(&pfkey_table_lock); | |
141 | } | |
142 | ||
143 | static __inline__ void pfkey_unlock_table(void) | |
144 | { | |
145 | if (atomic_dec_and_test(&pfkey_table_users)) | |
146 | wake_up(&pfkey_table_wait); | |
147 | } | |
148 | ||
149 | ||
90ddc4f0 | 150 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
151 | |
152 | static void pfkey_insert(struct sock *sk) | |
153 | { | |
154 | pfkey_table_grab(); | |
155 | sk_add_node(sk, &pfkey_table); | |
156 | pfkey_table_ungrab(); | |
157 | } | |
158 | ||
159 | static void pfkey_remove(struct sock *sk) | |
160 | { | |
161 | pfkey_table_grab(); | |
162 | sk_del_node_init(sk); | |
163 | pfkey_table_ungrab(); | |
164 | } | |
165 | ||
166 | static struct proto key_proto = { | |
167 | .name = "KEY", | |
168 | .owner = THIS_MODULE, | |
169 | .obj_size = sizeof(struct pfkey_sock), | |
170 | }; | |
171 | ||
1b8d7ae4 | 172 | static int pfkey_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
173 | { |
174 | struct sock *sk; | |
175 | int err; | |
176 | ||
1b8d7ae4 EB |
177 | if (net != &init_net) |
178 | return -EAFNOSUPPORT; | |
179 | ||
1da177e4 LT |
180 | if (!capable(CAP_NET_ADMIN)) |
181 | return -EPERM; | |
182 | if (sock->type != SOCK_RAW) | |
183 | return -ESOCKTNOSUPPORT; | |
184 | if (protocol != PF_KEY_V2) | |
185 | return -EPROTONOSUPPORT; | |
186 | ||
187 | err = -ENOMEM; | |
6257ff21 | 188 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto); |
1da177e4 LT |
189 | if (sk == NULL) |
190 | goto out; | |
8ff24541 | 191 | |
1da177e4 LT |
192 | sock->ops = &pfkey_ops; |
193 | sock_init_data(sock, sk); | |
194 | ||
195 | sk->sk_family = PF_KEY; | |
196 | sk->sk_destruct = pfkey_sock_destruct; | |
197 | ||
198 | atomic_inc(&pfkey_socks_nr); | |
199 | ||
200 | pfkey_insert(sk); | |
201 | ||
202 | return 0; | |
203 | out: | |
204 | return err; | |
205 | } | |
206 | ||
207 | static int pfkey_release(struct socket *sock) | |
208 | { | |
209 | struct sock *sk = sock->sk; | |
210 | ||
211 | if (!sk) | |
212 | return 0; | |
213 | ||
214 | pfkey_remove(sk); | |
215 | ||
216 | sock_orphan(sk); | |
217 | sock->sk = NULL; | |
218 | skb_queue_purge(&sk->sk_write_queue); | |
219 | sock_put(sk); | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | |
dd0fc66f | 225 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
226 | { |
227 | int err = -ENOBUFS; | |
228 | ||
229 | sock_hold(sk); | |
230 | if (*skb2 == NULL) { | |
231 | if (atomic_read(&skb->users) != 1) { | |
232 | *skb2 = skb_clone(skb, allocation); | |
233 | } else { | |
234 | *skb2 = skb; | |
235 | atomic_inc(&skb->users); | |
236 | } | |
237 | } | |
238 | if (*skb2 != NULL) { | |
239 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { | |
240 | skb_orphan(*skb2); | |
241 | skb_set_owner_r(*skb2, sk); | |
242 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | |
243 | sk->sk_data_ready(sk, (*skb2)->len); | |
244 | *skb2 = NULL; | |
245 | err = 0; | |
246 | } | |
247 | } | |
248 | sock_put(sk); | |
249 | return err; | |
250 | } | |
251 | ||
252 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
253 | #define BROADCAST_ALL 0 | |
254 | #define BROADCAST_ONE 1 | |
255 | #define BROADCAST_REGISTERED 2 | |
256 | #define BROADCAST_PROMISC_ONLY 4 | |
dd0fc66f | 257 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
1da177e4 LT |
258 | int broadcast_flags, struct sock *one_sk) |
259 | { | |
260 | struct sock *sk; | |
261 | struct hlist_node *node; | |
262 | struct sk_buff *skb2 = NULL; | |
263 | int err = -ESRCH; | |
264 | ||
265 | /* XXX Do we need something like netlink_overrun? I think | |
266 | * XXX PF_KEY socket apps will not mind current behavior. | |
267 | */ | |
268 | if (!skb) | |
269 | return -ENOMEM; | |
270 | ||
271 | pfkey_lock_table(); | |
272 | sk_for_each(sk, node, &pfkey_table) { | |
273 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
274 | int err2; | |
275 | ||
276 | /* Yes, it means that if you are meant to receive this | |
277 | * pfkey message you receive it twice as promiscuous | |
278 | * socket. | |
279 | */ | |
280 | if (pfk->promisc) | |
281 | pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
282 | ||
283 | /* the exact target will be processed later */ | |
284 | if (sk == one_sk) | |
285 | continue; | |
286 | if (broadcast_flags != BROADCAST_ALL) { | |
287 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
288 | continue; | |
289 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
290 | !pfk->registered) | |
291 | continue; | |
292 | if (broadcast_flags & BROADCAST_ONE) | |
293 | continue; | |
294 | } | |
295 | ||
296 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
297 | ||
298 | /* Error is cleare after succecful sending to at least one | |
299 | * registered KM */ | |
300 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
301 | err = err2; | |
302 | } | |
303 | pfkey_unlock_table(); | |
304 | ||
305 | if (one_sk != NULL) | |
306 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | |
307 | ||
308 | if (skb2) | |
309 | kfree_skb(skb2); | |
310 | kfree_skb(skb); | |
311 | return err; | |
312 | } | |
313 | ||
05238204 TT |
314 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
315 | { | |
12a169e7 | 316 | struct sadb_msg *hdr; |
05238204 TT |
317 | int rc; |
318 | ||
319 | rc = pfk->dump.dump(pfk); | |
320 | if (rc == -ENOBUFS) | |
321 | return 0; | |
322 | ||
12a169e7 HX |
323 | if (pfk->dump.skb) { |
324 | if (!pfkey_can_dump(&pfk->sk)) | |
325 | return 0; | |
326 | ||
327 | hdr = (struct sadb_msg *) pfk->dump.skb->data; | |
328 | hdr->sadb_msg_seq = 0; | |
329 | hdr->sadb_msg_errno = rc; | |
330 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
331 | &pfk->sk); | |
332 | pfk->dump.skb = NULL; | |
333 | } | |
334 | ||
05238204 TT |
335 | pfkey_terminate_dump(pfk); |
336 | return rc; | |
337 | } | |
338 | ||
1da177e4 LT |
339 | static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) |
340 | { | |
341 | *new = *orig; | |
342 | } | |
343 | ||
344 | static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) | |
345 | { | |
346 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
347 | struct sadb_msg *hdr; | |
348 | ||
349 | if (!skb) | |
350 | return -ENOBUFS; | |
351 | ||
352 | /* Woe be to the platform trying to support PFKEY yet | |
353 | * having normal errnos outside the 1-255 range, inclusive. | |
354 | */ | |
355 | err = -err; | |
356 | if (err == ERESTARTSYS || | |
357 | err == ERESTARTNOHAND || | |
358 | err == ERESTARTNOINTR) | |
359 | err = EINTR; | |
360 | if (err >= 512) | |
361 | err = EINVAL; | |
09a62660 | 362 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
363 | |
364 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
365 | pfkey_hdr_dup(hdr, orig); | |
366 | hdr->sadb_msg_errno = (uint8_t) err; | |
367 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
368 | sizeof(uint64_t)); | |
369 | ||
370 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
375 | static u8 sadb_ext_min_len[] = { | |
376 | [SADB_EXT_RESERVED] = (u8) 0, | |
377 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
378 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
379 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
380 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
381 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
382 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
383 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
384 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
385 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
386 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
387 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
388 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
389 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
390 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
391 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
392 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
393 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
394 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
395 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
396 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
397 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
398 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
399 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 400 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
13c1d189 | 401 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
1da177e4 LT |
402 | }; |
403 | ||
404 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
405 | static int verify_address_len(void *p) | |
406 | { | |
407 | struct sadb_address *sp = p; | |
408 | struct sockaddr *addr = (struct sockaddr *)(sp + 1); | |
409 | struct sockaddr_in *sin; | |
410 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
411 | struct sockaddr_in6 *sin6; | |
412 | #endif | |
413 | int len; | |
414 | ||
415 | switch (addr->sa_family) { | |
416 | case AF_INET: | |
356f89e1 | 417 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
418 | if (sp->sadb_address_len != len || |
419 | sp->sadb_address_prefixlen > 32) | |
420 | return -EINVAL; | |
421 | break; | |
422 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
423 | case AF_INET6: | |
356f89e1 | 424 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
425 | if (sp->sadb_address_len != len || |
426 | sp->sadb_address_prefixlen > 128) | |
427 | return -EINVAL; | |
428 | break; | |
429 | #endif | |
430 | default: | |
431 | /* It is user using kernel to keep track of security | |
432 | * associations for another protocol, such as | |
433 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
434 | * lengths. | |
435 | * | |
436 | * XXX Actually, association/policy database is not yet | |
437 | * XXX able to cope with arbitrary sockaddr families. | |
438 | * XXX When it can, remove this -EINVAL. -DaveM | |
439 | */ | |
440 | return -EINVAL; | |
441 | break; | |
3ff50b79 | 442 | } |
1da177e4 LT |
443 | |
444 | return 0; | |
445 | } | |
446 | ||
df71837d TJ |
447 | static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) |
448 | { | |
356f89e1 IJ |
449 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
450 | sec_ctx->sadb_x_ctx_len, | |
451 | sizeof(uint64_t)); | |
df71837d TJ |
452 | } |
453 | ||
454 | static inline int verify_sec_ctx_len(void *p) | |
455 | { | |
456 | struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; | |
298bb621 | 457 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 458 | |
298bb621 | 459 | if (len > PAGE_SIZE) |
df71837d TJ |
460 | return -EINVAL; |
461 | ||
462 | len = pfkey_sec_ctx_len(sec_ctx); | |
463 | ||
464 | if (sec_ctx->sadb_x_sec_len != len) | |
465 | return -EINVAL; | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) | |
471 | { | |
472 | struct xfrm_user_sec_ctx *uctx = NULL; | |
473 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
474 | ||
475 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); | |
476 | ||
477 | if (!uctx) | |
478 | return NULL; | |
479 | ||
480 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
481 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
482 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
483 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
484 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
485 | memcpy(uctx + 1, sec_ctx + 1, | |
486 | uctx->ctx_len); | |
487 | ||
488 | return uctx; | |
489 | } | |
490 | ||
1da177e4 LT |
491 | static int present_and_same_family(struct sadb_address *src, |
492 | struct sadb_address *dst) | |
493 | { | |
494 | struct sockaddr *s_addr, *d_addr; | |
495 | ||
496 | if (!src || !dst) | |
497 | return 0; | |
498 | ||
499 | s_addr = (struct sockaddr *)(src + 1); | |
500 | d_addr = (struct sockaddr *)(dst + 1); | |
501 | if (s_addr->sa_family != d_addr->sa_family) | |
502 | return 0; | |
503 | if (s_addr->sa_family != AF_INET | |
504 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
505 | && s_addr->sa_family != AF_INET6 | |
506 | #endif | |
507 | ) | |
508 | return 0; | |
509 | ||
510 | return 1; | |
511 | } | |
512 | ||
513 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
514 | { | |
515 | char *p = (char *) hdr; | |
516 | int len = skb->len; | |
517 | ||
518 | len -= sizeof(*hdr); | |
519 | p += sizeof(*hdr); | |
520 | while (len > 0) { | |
521 | struct sadb_ext *ehdr = (struct sadb_ext *) p; | |
522 | uint16_t ext_type; | |
523 | int ext_len; | |
524 | ||
525 | ext_len = ehdr->sadb_ext_len; | |
526 | ext_len *= sizeof(uint64_t); | |
527 | ext_type = ehdr->sadb_ext_type; | |
528 | if (ext_len < sizeof(uint64_t) || | |
529 | ext_len > len || | |
530 | ext_type == SADB_EXT_RESERVED) | |
531 | return -EINVAL; | |
532 | ||
533 | if (ext_type <= SADB_EXT_MAX) { | |
534 | int min = (int) sadb_ext_min_len[ext_type]; | |
535 | if (ext_len < min) | |
536 | return -EINVAL; | |
537 | if (ext_hdrs[ext_type-1] != NULL) | |
538 | return -EINVAL; | |
539 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
540 | ext_type == SADB_EXT_ADDRESS_DST || | |
541 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
542 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
543 | if (verify_address_len(p)) | |
544 | return -EINVAL; | |
8ff24541 | 545 | } |
df71837d TJ |
546 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
547 | if (verify_sec_ctx_len(p)) | |
548 | return -EINVAL; | |
549 | } | |
1da177e4 LT |
550 | ext_hdrs[ext_type-1] = p; |
551 | } | |
552 | p += ext_len; | |
553 | len -= ext_len; | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static uint16_t | |
560 | pfkey_satype2proto(uint8_t satype) | |
561 | { | |
562 | switch (satype) { | |
563 | case SADB_SATYPE_UNSPEC: | |
564 | return IPSEC_PROTO_ANY; | |
565 | case SADB_SATYPE_AH: | |
566 | return IPPROTO_AH; | |
567 | case SADB_SATYPE_ESP: | |
568 | return IPPROTO_ESP; | |
569 | case SADB_X_SATYPE_IPCOMP: | |
570 | return IPPROTO_COMP; | |
571 | break; | |
572 | default: | |
573 | return 0; | |
574 | } | |
575 | /* NOTREACHED */ | |
576 | } | |
577 | ||
578 | static uint8_t | |
579 | pfkey_proto2satype(uint16_t proto) | |
580 | { | |
581 | switch (proto) { | |
582 | case IPPROTO_AH: | |
583 | return SADB_SATYPE_AH; | |
584 | case IPPROTO_ESP: | |
585 | return SADB_SATYPE_ESP; | |
586 | case IPPROTO_COMP: | |
587 | return SADB_X_SATYPE_IPCOMP; | |
588 | break; | |
589 | default: | |
590 | return 0; | |
591 | } | |
592 | /* NOTREACHED */ | |
593 | } | |
594 | ||
595 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
596 | * say specifically 'just raw sockets' as we encode them as 255. | |
597 | */ | |
598 | ||
599 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
600 | { | |
601 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); | |
602 | } | |
603 | ||
604 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
605 | { | |
606 | return (proto ? proto : IPSEC_PROTO_ANY); | |
607 | } | |
608 | ||
9e8b4ed8 YH |
609 | static inline int pfkey_sockaddr_len(sa_family_t family) |
610 | { | |
611 | switch (family) { | |
612 | case AF_INET: | |
613 | return sizeof(struct sockaddr_in); | |
614 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
615 | case AF_INET6: | |
616 | return sizeof(struct sockaddr_in6); | |
617 | #endif | |
618 | } | |
619 | return 0; | |
620 | } | |
621 | ||
5f95ac91 YH |
622 | static |
623 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 624 | { |
5f95ac91 | 625 | switch (sa->sa_family) { |
1da177e4 | 626 | case AF_INET: |
8ff24541 | 627 | xaddr->a4 = |
5f95ac91 | 628 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 LT |
629 | return AF_INET; |
630 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
631 | case AF_INET6: | |
8ff24541 | 632 | memcpy(xaddr->a6, |
5f95ac91 | 633 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
634 | sizeof(struct in6_addr)); |
635 | return AF_INET6; | |
636 | #endif | |
1da177e4 | 637 | } |
5f95ac91 YH |
638 | return 0; |
639 | } | |
640 | ||
641 | static | |
642 | int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr) | |
643 | { | |
644 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
645 | xaddr); | |
1da177e4 LT |
646 | } |
647 | ||
648 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs) | |
649 | { | |
650 | struct sadb_sa *sa; | |
651 | struct sadb_address *addr; | |
652 | uint16_t proto; | |
653 | unsigned short family; | |
654 | xfrm_address_t *xaddr; | |
655 | ||
656 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
657 | if (sa == NULL) | |
658 | return NULL; | |
659 | ||
660 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
661 | if (proto == 0) | |
662 | return NULL; | |
663 | ||
664 | /* sadb_address_len should be checked by caller */ | |
665 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
666 | if (addr == NULL) | |
667 | return NULL; | |
668 | ||
669 | family = ((struct sockaddr *)(addr + 1))->sa_family; | |
670 | switch (family) { | |
671 | case AF_INET: | |
672 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; | |
673 | break; | |
674 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
675 | case AF_INET6: | |
676 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; | |
677 | break; | |
678 | #endif | |
679 | default: | |
680 | xaddr = NULL; | |
681 | } | |
682 | ||
683 | if (!xaddr) | |
684 | return NULL; | |
685 | ||
686 | return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family); | |
687 | } | |
688 | ||
689 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 690 | |
1da177e4 LT |
691 | static int |
692 | pfkey_sockaddr_size(sa_family_t family) | |
693 | { | |
9e8b4ed8 | 694 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
695 | } |
696 | ||
55569ce2 KM |
697 | static inline int pfkey_mode_from_xfrm(int mode) |
698 | { | |
699 | switch(mode) { | |
700 | case XFRM_MODE_TRANSPORT: | |
701 | return IPSEC_MODE_TRANSPORT; | |
702 | case XFRM_MODE_TUNNEL: | |
703 | return IPSEC_MODE_TUNNEL; | |
704 | case XFRM_MODE_BEET: | |
705 | return IPSEC_MODE_BEET; | |
706 | default: | |
707 | return -1; | |
708 | } | |
709 | } | |
710 | ||
711 | static inline int pfkey_mode_to_xfrm(int mode) | |
712 | { | |
713 | switch(mode) { | |
714 | case IPSEC_MODE_ANY: /*XXX*/ | |
715 | case IPSEC_MODE_TRANSPORT: | |
716 | return XFRM_MODE_TRANSPORT; | |
717 | case IPSEC_MODE_TUNNEL: | |
718 | return XFRM_MODE_TUNNEL; | |
719 | case IPSEC_MODE_BEET: | |
720 | return XFRM_MODE_BEET; | |
721 | default: | |
722 | return -1; | |
723 | } | |
724 | } | |
725 | ||
e5b56652 YH |
726 | static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port, |
727 | struct sockaddr *sa, | |
728 | unsigned short family) | |
729 | { | |
730 | switch (family) { | |
731 | case AF_INET: | |
732 | { | |
733 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
734 | sin->sin_family = AF_INET; | |
735 | sin->sin_port = port; | |
736 | sin->sin_addr.s_addr = xaddr->a4; | |
737 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
738 | return 32; | |
739 | } | |
740 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
741 | case AF_INET6: | |
742 | { | |
743 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
744 | sin6->sin6_family = AF_INET6; | |
745 | sin6->sin6_port = port; | |
746 | sin6->sin6_flowinfo = 0; | |
747 | ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6); | |
748 | sin6->sin6_scope_id = 0; | |
749 | return 128; | |
750 | } | |
751 | #endif | |
752 | } | |
753 | return 0; | |
754 | } | |
755 | ||
050f009e HX |
756 | static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x, |
757 | int add_keys, int hsc) | |
1da177e4 LT |
758 | { |
759 | struct sk_buff *skb; | |
760 | struct sadb_msg *hdr; | |
761 | struct sadb_sa *sa; | |
762 | struct sadb_lifetime *lifetime; | |
763 | struct sadb_address *addr; | |
764 | struct sadb_key *key; | |
765 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
766 | struct sadb_x_sec_ctx *sec_ctx; |
767 | struct xfrm_sec_ctx *xfrm_ctx; | |
768 | int ctx_size = 0; | |
1da177e4 LT |
769 | int size; |
770 | int auth_key_size = 0; | |
771 | int encrypt_key_size = 0; | |
772 | int sockaddr_size; | |
773 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 774 | int mode; |
1da177e4 LT |
775 | |
776 | /* address family check */ | |
777 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
778 | if (!sockaddr_size) | |
779 | return ERR_PTR(-EINVAL); | |
780 | ||
781 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
782 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 783 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
784 | sizeof(struct sadb_lifetime) + |
785 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
786 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 787 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
788 | sockaddr_size*2 + |
789 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
790 | |
791 | if ((xfrm_ctx = x->security)) { | |
792 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
793 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
794 | } | |
795 | ||
1da177e4 | 796 | /* identity & sensitivity */ |
81b302a3 | 797 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
798 | size += sizeof(struct sadb_address) + sockaddr_size; |
799 | ||
800 | if (add_keys) { | |
801 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
802 | auth_key_size = |
803 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
804 | size += sizeof(struct sadb_key) + auth_key_size; |
805 | } | |
806 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
807 | encrypt_key_size = |
808 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
809 | size += sizeof(struct sadb_key) + encrypt_key_size; |
810 | } | |
811 | } | |
812 | if (x->encap) | |
813 | natt = x->encap; | |
814 | ||
815 | if (natt && natt->encap_type) { | |
816 | size += sizeof(struct sadb_x_nat_t_type); | |
817 | size += sizeof(struct sadb_x_nat_t_port); | |
818 | size += sizeof(struct sadb_x_nat_t_port); | |
819 | } | |
820 | ||
821 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
822 | if (skb == NULL) | |
823 | return ERR_PTR(-ENOBUFS); | |
824 | ||
825 | /* call should fill header later */ | |
826 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
827 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
828 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
829 | ||
830 | /* sa */ | |
831 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
832 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
833 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
834 | sa->sadb_sa_spi = x->id.spi; | |
835 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
836 | switch (x->km.state) { |
837 | case XFRM_STATE_VALID: | |
838 | sa->sadb_sa_state = x->km.dying ? | |
839 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
840 | break; | |
841 | case XFRM_STATE_ACQ: | |
1da177e4 | 842 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
843 | break; |
844 | default: | |
1da177e4 | 845 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
846 | break; |
847 | } | |
1da177e4 LT |
848 | sa->sadb_sa_auth = 0; |
849 | if (x->aalg) { | |
850 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
851 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | |
852 | } | |
853 | sa->sadb_sa_encrypt = 0; | |
854 | BUG_ON(x->ealg && x->calg); | |
855 | if (x->ealg) { | |
856 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
857 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
858 | } | |
859 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
860 | if (x->calg) { | |
861 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
862 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
863 | } | |
864 | ||
865 | sa->sadb_sa_flags = 0; | |
866 | if (x->props.flags & XFRM_STATE_NOECN) | |
867 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
868 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
869 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
870 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
871 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
872 | |
873 | /* hard time */ | |
874 | if (hsc & 2) { | |
8ff24541 | 875 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
876 | sizeof(struct sadb_lifetime)); |
877 | lifetime->sadb_lifetime_len = | |
878 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
879 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
880 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
881 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
882 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
883 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
884 | } | |
885 | /* soft time */ | |
886 | if (hsc & 1) { | |
8ff24541 | 887 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
888 | sizeof(struct sadb_lifetime)); |
889 | lifetime->sadb_lifetime_len = | |
890 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
891 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
892 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
893 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
894 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
895 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
896 | } | |
897 | /* current time */ | |
898 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
899 | sizeof(struct sadb_lifetime)); | |
900 | lifetime->sadb_lifetime_len = | |
901 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
902 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
903 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
904 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
905 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
906 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
907 | /* src address */ | |
8ff24541 | 908 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 909 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 910 | addr->sadb_address_len = |
1da177e4 LT |
911 | (sizeof(struct sadb_address)+sockaddr_size)/ |
912 | sizeof(uint64_t); | |
913 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
914 | /* "if the ports are non-zero, then the sadb_address_proto field, |
915 | normally zero, MUST be filled in with the transport | |
1da177e4 | 916 | protocol's number." - RFC2367 */ |
8ff24541 | 917 | addr->sadb_address_proto = 0; |
1da177e4 | 918 | addr->sadb_address_reserved = 0; |
1da177e4 | 919 | |
e5b56652 YH |
920 | addr->sadb_address_prefixlen = |
921 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
922 | (struct sockaddr *) (addr + 1), | |
923 | x->props.family); | |
924 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
925 | BUG(); |
926 | ||
927 | /* dst address */ | |
8ff24541 | 928 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 929 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 930 | addr->sadb_address_len = |
1da177e4 LT |
931 | (sizeof(struct sadb_address)+sockaddr_size)/ |
932 | sizeof(uint64_t); | |
933 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 934 | addr->sadb_address_proto = 0; |
1da177e4 | 935 | addr->sadb_address_reserved = 0; |
1da177e4 | 936 | |
e5b56652 YH |
937 | addr->sadb_address_prefixlen = |
938 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
939 | (struct sockaddr *) (addr + 1), | |
940 | x->props.family); | |
941 | if (!addr->sadb_address_prefixlen) | |
942 | BUG(); | |
1da177e4 | 943 | |
e5b56652 YH |
944 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, |
945 | x->props.family)) { | |
946 | addr = (struct sadb_address*) skb_put(skb, | |
947 | sizeof(struct sadb_address)+sockaddr_size); | |
948 | addr->sadb_address_len = | |
949 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
950 | sizeof(uint64_t); | |
951 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
952 | addr->sadb_address_proto = | |
953 | pfkey_proto_from_xfrm(x->sel.proto); | |
954 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
955 | addr->sadb_address_reserved = 0; | |
1da177e4 | 956 | |
e5b56652 YH |
957 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
958 | (struct sockaddr *) (addr + 1), | |
959 | x->props.family); | |
1da177e4 | 960 | } |
1da177e4 LT |
961 | |
962 | /* auth key */ | |
963 | if (add_keys && auth_key_size) { | |
8ff24541 | 964 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 LT |
965 | sizeof(struct sadb_key)+auth_key_size); |
966 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
967 | sizeof(uint64_t); | |
968 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
969 | key->sadb_key_bits = x->aalg->alg_key_len; | |
970 | key->sadb_key_reserved = 0; | |
971 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
972 | } | |
973 | /* encrypt key */ | |
974 | if (add_keys && encrypt_key_size) { | |
8ff24541 | 975 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 | 976 | sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541 | 977 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
978 | encrypt_key_size) / sizeof(uint64_t); |
979 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
980 | key->sadb_key_bits = x->ealg->alg_key_len; | |
981 | key->sadb_key_reserved = 0; | |
8ff24541 | 982 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
983 | (x->ealg->alg_key_len+7)/8); |
984 | } | |
985 | ||
986 | /* sa */ | |
987 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
988 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
989 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
990 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
991 | kfree_skb(skb); | |
992 | return ERR_PTR(-EINVAL); | |
993 | } | |
994 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
995 | sa2->sadb_x_sa2_reserved1 = 0; |
996 | sa2->sadb_x_sa2_reserved2 = 0; | |
997 | sa2->sadb_x_sa2_sequence = 0; | |
998 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
999 | ||
1000 | if (natt && natt->encap_type) { | |
1001 | struct sadb_x_nat_t_type *n_type; | |
1002 | struct sadb_x_nat_t_port *n_port; | |
1003 | ||
1004 | /* type */ | |
1005 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
1006 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
1007 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
1008 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
1009 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
1010 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
1011 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
1012 | ||
1013 | /* source port */ | |
1014 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
1015 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
1016 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
1017 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
1018 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1019 | ||
1020 | /* dest port */ | |
1021 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
1022 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
1023 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
1024 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
1025 | n_port->sadb_x_nat_t_port_reserved = 0; | |
1026 | } | |
1027 | ||
df71837d TJ |
1028 | /* security context */ |
1029 | if (xfrm_ctx) { | |
1030 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
1031 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
1032 | sec_ctx->sadb_x_sec_len = | |
1033 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1034 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1035 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1036 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1037 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1038 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1039 | xfrm_ctx->ctx_len); | |
1040 | } | |
1041 | ||
1da177e4 LT |
1042 | return skb; |
1043 | } | |
1044 | ||
050f009e HX |
1045 | |
1046 | static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x) | |
1047 | { | |
1048 | struct sk_buff *skb; | |
1049 | ||
050f009e | 1050 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1051 | |
1052 | return skb; | |
1053 | } | |
1054 | ||
1055 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x, | |
1056 | int hsc) | |
1057 | { | |
1058 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1059 | } | |
1060 | ||
8ff24541 | 1061 | static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, |
1da177e4 LT |
1062 | void **ext_hdrs) |
1063 | { | |
8ff24541 | 1064 | struct xfrm_state *x; |
1da177e4 LT |
1065 | struct sadb_lifetime *lifetime; |
1066 | struct sadb_sa *sa; | |
1067 | struct sadb_key *key; | |
df71837d | 1068 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
1069 | uint16_t proto; |
1070 | int err; | |
8ff24541 | 1071 | |
1da177e4 LT |
1072 | |
1073 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; | |
1074 | if (!sa || | |
1075 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1076 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1077 | return ERR_PTR(-EINVAL); | |
1078 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1079 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1080 | return ERR_PTR(-EINVAL); | |
1081 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1082 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1083 | return ERR_PTR(-EINVAL); | |
1084 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1085 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1086 | return ERR_PTR(-EINVAL); | |
1087 | ||
1088 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1089 | if (proto == 0) | |
1090 | return ERR_PTR(-EINVAL); | |
1091 | ||
1092 | /* default error is no buffer space */ | |
1093 | err = -ENOBUFS; | |
1094 | ||
1095 | /* RFC2367: | |
1096 | ||
1097 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1098 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1099 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1100 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1101 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1102 | not true. | |
1103 | ||
8ff24541 | 1104 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1105 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1106 | */ | |
1107 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1108 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1109 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1110 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1111 | return ERR_PTR(-EINVAL); | |
1112 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; | |
1113 | if (key != NULL && | |
1114 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1115 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1116 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1117 | return ERR_PTR(-EINVAL); | |
1118 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1119 | if (key != NULL && | |
1120 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1121 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1122 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1123 | return ERR_PTR(-EINVAL); | |
1124 | ||
1125 | x = xfrm_state_alloc(); | |
1126 | if (x == NULL) | |
1127 | return ERR_PTR(-ENOBUFS); | |
1128 | ||
1129 | x->id.proto = proto; | |
1130 | x->id.spi = sa->sadb_sa_spi; | |
1131 | x->props.replay_window = sa->sadb_sa_replay; | |
1132 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | |
1133 | x->props.flags |= XFRM_STATE_NOECN; | |
1134 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1135 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1136 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1137 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 LT |
1138 | |
1139 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; | |
1140 | if (lifetime != NULL) { | |
1141 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1142 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1143 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1144 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1145 | } | |
1146 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; | |
1147 | if (lifetime != NULL) { | |
1148 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1149 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1150 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1151 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1152 | } | |
df71837d TJ |
1153 | |
1154 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; | |
1155 | if (sec_ctx != NULL) { | |
1156 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
1157 | ||
1158 | if (!uctx) | |
1159 | goto out; | |
1160 | ||
1161 | err = security_xfrm_state_alloc(x, uctx); | |
1162 | kfree(uctx); | |
1163 | ||
1164 | if (err) | |
1165 | goto out; | |
1166 | } | |
1167 | ||
1da177e4 LT |
1168 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1169 | if (sa->sadb_sa_auth) { | |
1170 | int keysize = 0; | |
1171 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
1172 | if (!a) { | |
1173 | err = -ENOSYS; | |
1174 | goto out; | |
1175 | } | |
1176 | if (key) | |
1177 | keysize = (key->sadb_key_bits + 7) / 8; | |
1178 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1179 | if (!x->aalg) | |
1180 | goto out; | |
1181 | strcpy(x->aalg->alg_name, a->name); | |
1182 | x->aalg->alg_key_len = 0; | |
1183 | if (key) { | |
1184 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1185 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1186 | } | |
1187 | x->props.aalgo = sa->sadb_sa_auth; | |
1188 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1189 | } | |
1190 | if (sa->sadb_sa_encrypt) { | |
1191 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1192 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
1193 | if (!a) { | |
1194 | err = -ENOSYS; | |
1195 | goto out; | |
1196 | } | |
1197 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1198 | if (!x->calg) | |
1199 | goto out; | |
1200 | strcpy(x->calg->alg_name, a->name); | |
1201 | x->props.calgo = sa->sadb_sa_encrypt; | |
1202 | } else { | |
1203 | int keysize = 0; | |
1204 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
1205 | if (!a) { | |
1206 | err = -ENOSYS; | |
1207 | goto out; | |
1208 | } | |
1209 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1210 | if (key) | |
1211 | keysize = (key->sadb_key_bits + 7) / 8; | |
1212 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1213 | if (!x->ealg) | |
1214 | goto out; | |
1215 | strcpy(x->ealg->alg_name, a->name); | |
1216 | x->ealg->alg_key_len = 0; | |
1217 | if (key) { | |
1218 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1219 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1220 | } | |
1221 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1222 | } | |
1223 | } | |
1224 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1225 | ||
8ff24541 | 1226 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
1227 | &x->props.saddr); |
1228 | if (!x->props.family) { | |
1229 | err = -EAFNOSUPPORT; | |
1230 | goto out; | |
1231 | } | |
8ff24541 | 1232 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1233 | &x->id.daddr); |
1234 | ||
1235 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
1236 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; | |
55569ce2 KM |
1237 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1238 | if (mode < 0) { | |
1239 | err = -EINVAL; | |
1240 | goto out; | |
1241 | } | |
1242 | x->props.mode = mode; | |
1da177e4 LT |
1243 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1244 | } | |
1245 | ||
1246 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
1247 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; | |
1248 | ||
1249 | /* Nobody uses this, but we try. */ | |
1250 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1251 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1252 | } | |
1253 | ||
4da51056 | 1254 | if (!x->sel.family) |
4a4b6271 JL |
1255 | x->sel.family = x->props.family; |
1256 | ||
1da177e4 LT |
1257 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
1258 | struct sadb_x_nat_t_type* n_type; | |
1259 | struct xfrm_encap_tmpl *natt; | |
1260 | ||
1261 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1262 | if (!x->encap) | |
1263 | goto out; | |
1264 | ||
1265 | natt = x->encap; | |
1266 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1267 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1268 | ||
1269 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
1270 | struct sadb_x_nat_t_port* n_port = | |
1271 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; | |
1272 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1273 | } | |
1274 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
1275 | struct sadb_x_nat_t_port* n_port = | |
1276 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; | |
1277 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1278 | } | |
1279 | } | |
1280 | ||
72cb6962 HX |
1281 | err = xfrm_init_state(x); |
1282 | if (err) | |
1da177e4 | 1283 | goto out; |
72cb6962 | 1284 | |
1da177e4 | 1285 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1286 | return x; |
1287 | ||
1288 | out: | |
1289 | x->km.state = XFRM_STATE_DEAD; | |
1290 | xfrm_state_put(x); | |
1291 | return ERR_PTR(err); | |
1292 | } | |
1293 | ||
1294 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1295 | { | |
1296 | return -EOPNOTSUPP; | |
1297 | } | |
1298 | ||
1299 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1300 | { | |
1301 | struct sk_buff *resp_skb; | |
1302 | struct sadb_x_sa2 *sa2; | |
1303 | struct sadb_address *saddr, *daddr; | |
1304 | struct sadb_msg *out_hdr; | |
658b219e | 1305 | struct sadb_spirange *range; |
1da177e4 | 1306 | struct xfrm_state *x = NULL; |
55569ce2 | 1307 | int mode; |
658b219e HX |
1308 | int err; |
1309 | u32 min_spi, max_spi; | |
1da177e4 LT |
1310 | u32 reqid; |
1311 | u8 proto; | |
1312 | unsigned short family; | |
1313 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1314 | ||
1315 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1316 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1317 | return -EINVAL; | |
1318 | ||
1319 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1320 | if (proto == 0) | |
1321 | return -EINVAL; | |
1322 | ||
1323 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1324 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1325 | if (mode < 0) | |
1326 | return -EINVAL; | |
1da177e4 LT |
1327 | reqid = sa2->sadb_x_sa2_reqid; |
1328 | } else { | |
1329 | mode = 0; | |
1330 | reqid = 0; | |
1331 | } | |
1332 | ||
1333 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1334 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1335 | ||
1336 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1337 | switch (family) { | |
1338 | case AF_INET: | |
1339 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1340 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1341 | break; | |
1342 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1343 | case AF_INET6: | |
1344 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1345 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1346 | break; | |
1347 | #endif | |
1348 | } | |
1349 | ||
1350 | if (hdr->sadb_msg_seq) { | |
1351 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1352 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { | |
1353 | xfrm_state_put(x); | |
1354 | x = NULL; | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | if (!x) | |
1359 | x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family); | |
1360 | ||
1361 | if (x == NULL) | |
1362 | return -ENOENT; | |
1363 | ||
658b219e HX |
1364 | min_spi = 0x100; |
1365 | max_spi = 0x0fffffff; | |
1da177e4 | 1366 | |
658b219e HX |
1367 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1368 | if (range) { | |
1369 | min_spi = range->sadb_spirange_min; | |
1370 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1371 | } |
658b219e HX |
1372 | |
1373 | err = xfrm_alloc_spi(x, min_spi, max_spi); | |
050f009e | 1374 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1375 | |
1376 | if (IS_ERR(resp_skb)) { | |
1377 | xfrm_state_put(x); | |
1378 | return PTR_ERR(resp_skb); | |
1379 | } | |
1380 | ||
1381 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1382 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1383 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1384 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1385 | out_hdr->sadb_msg_errno = 0; | |
1386 | out_hdr->sadb_msg_reserved = 0; | |
1387 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1388 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1389 | ||
1390 | xfrm_state_put(x); | |
1391 | ||
1392 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk); | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1398 | { | |
1399 | struct xfrm_state *x; | |
1400 | ||
1401 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1402 | return -EOPNOTSUPP; | |
1403 | ||
1404 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1405 | return 0; | |
1406 | ||
1407 | x = xfrm_find_acq_byseq(hdr->sadb_msg_seq); | |
1408 | if (x == NULL) | |
1409 | return 0; | |
1410 | ||
1411 | spin_lock_bh(&x->lock); | |
1412 | if (x->km.state == XFRM_STATE_ACQ) { | |
1413 | x->km.state = XFRM_STATE_ERROR; | |
1414 | wake_up(&km_waitq); | |
1415 | } | |
1416 | spin_unlock_bh(&x->lock); | |
1417 | xfrm_state_put(x); | |
1418 | return 0; | |
1419 | } | |
1420 | ||
26b15dad JHS |
1421 | static inline int event2poltype(int event) |
1422 | { | |
1423 | switch (event) { | |
f60f6b8f | 1424 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1425 | return SADB_X_SPDDELETE; |
f60f6b8f | 1426 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1427 | return SADB_X_SPDADD; |
f60f6b8f | 1428 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1429 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1430 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1431 | // return SADB_X_SPDEXPIRE; |
1432 | default: | |
1433 | printk("pfkey: Unknown policy event %d\n", event); | |
1434 | break; | |
1435 | } | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
1440 | static inline int event2keytype(int event) | |
1441 | { | |
1442 | switch (event) { | |
f60f6b8f | 1443 | case XFRM_MSG_DELSA: |
26b15dad | 1444 | return SADB_DELETE; |
f60f6b8f | 1445 | case XFRM_MSG_NEWSA: |
26b15dad | 1446 | return SADB_ADD; |
f60f6b8f | 1447 | case XFRM_MSG_UPDSA: |
26b15dad | 1448 | return SADB_UPDATE; |
f60f6b8f | 1449 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1450 | return SADB_EXPIRE; |
1451 | default: | |
1452 | printk("pfkey: Unknown SA event %d\n", event); | |
1453 | break; | |
1454 | } | |
1455 | ||
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | /* ADD/UPD/DEL */ | |
1460 | static int key_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1461 | { | |
1462 | struct sk_buff *skb; | |
1463 | struct sadb_msg *hdr; | |
26b15dad | 1464 | |
050f009e | 1465 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1466 | |
1467 | if (IS_ERR(skb)) | |
1468 | return PTR_ERR(skb); | |
1469 | ||
1470 | hdr = (struct sadb_msg *) skb->data; | |
1471 | hdr->sadb_msg_version = PF_KEY_V2; | |
1472 | hdr->sadb_msg_type = event2keytype(c->event); | |
1473 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1474 | hdr->sadb_msg_errno = 0; | |
1475 | hdr->sadb_msg_reserved = 0; | |
1476 | hdr->sadb_msg_seq = c->seq; | |
1477 | hdr->sadb_msg_pid = c->pid; | |
1478 | ||
1479 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1480 | ||
1481 | return 0; | |
1482 | } | |
1da177e4 LT |
1483 | |
1484 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1485 | { | |
1da177e4 LT |
1486 | struct xfrm_state *x; |
1487 | int err; | |
26b15dad | 1488 | struct km_event c; |
1da177e4 | 1489 | |
1da177e4 LT |
1490 | x = pfkey_msg2xfrm_state(hdr, ext_hdrs); |
1491 | if (IS_ERR(x)) | |
1492 | return PTR_ERR(x); | |
1493 | ||
26b15dad | 1494 | xfrm_state_hold(x); |
1da177e4 LT |
1495 | if (hdr->sadb_msg_type == SADB_ADD) |
1496 | err = xfrm_state_add(x); | |
1497 | else | |
1498 | err = xfrm_state_update(x); | |
1499 | ||
ab5f5e8b | 1500 | xfrm_audit_state_add(x, err ? 0 : 1, |
2532386f EP |
1501 | audit_get_loginuid(current), |
1502 | audit_get_sessionid(current), 0); | |
161a09e7 | 1503 | |
1da177e4 LT |
1504 | if (err < 0) { |
1505 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1506 | __xfrm_state_put(x); |
7d6dfe1f | 1507 | goto out; |
1da177e4 LT |
1508 | } |
1509 | ||
26b15dad | 1510 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1511 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1512 | else |
f60f6b8f | 1513 | c.event = XFRM_MSG_UPDSA; |
26b15dad JHS |
1514 | c.seq = hdr->sadb_msg_seq; |
1515 | c.pid = hdr->sadb_msg_pid; | |
1516 | km_state_notify(x, &c); | |
7d6dfe1f | 1517 | out: |
26b15dad | 1518 | xfrm_state_put(x); |
26b15dad | 1519 | return err; |
1da177e4 LT |
1520 | } |
1521 | ||
1522 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1523 | { | |
1524 | struct xfrm_state *x; | |
26b15dad JHS |
1525 | struct km_event c; |
1526 | int err; | |
1da177e4 LT |
1527 | |
1528 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1529 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1530 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1531 | return -EINVAL; | |
1532 | ||
1533 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1534 | if (x == NULL) | |
1535 | return -ESRCH; | |
1536 | ||
c8c05a8e CZ |
1537 | if ((err = security_xfrm_state_delete(x))) |
1538 | goto out; | |
1539 | ||
1da177e4 | 1540 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1541 | err = -EPERM; |
1542 | goto out; | |
1da177e4 | 1543 | } |
161a09e7 | 1544 | |
26b15dad | 1545 | err = xfrm_state_delete(x); |
161a09e7 | 1546 | |
c8c05a8e CZ |
1547 | if (err < 0) |
1548 | goto out; | |
1da177e4 | 1549 | |
26b15dad JHS |
1550 | c.seq = hdr->sadb_msg_seq; |
1551 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1552 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1553 | km_state_notify(x, &c); |
c8c05a8e | 1554 | out: |
ab5f5e8b | 1555 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
1556 | audit_get_loginuid(current), |
1557 | audit_get_sessionid(current), 0); | |
26b15dad | 1558 | xfrm_state_put(x); |
1da177e4 | 1559 | |
26b15dad | 1560 | return err; |
1da177e4 LT |
1561 | } |
1562 | ||
1563 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1564 | { | |
1565 | __u8 proto; | |
1566 | struct sk_buff *out_skb; | |
1567 | struct sadb_msg *out_hdr; | |
1568 | struct xfrm_state *x; | |
1569 | ||
1570 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1571 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1572 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1573 | return -EINVAL; | |
1574 | ||
1575 | x = pfkey_xfrm_state_lookup(hdr, ext_hdrs); | |
1576 | if (x == NULL) | |
1577 | return -ESRCH; | |
1578 | ||
050f009e | 1579 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1580 | proto = x->id.proto; |
1581 | xfrm_state_put(x); | |
1582 | if (IS_ERR(out_skb)) | |
1583 | return PTR_ERR(out_skb); | |
1584 | ||
1585 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1586 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1587 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1588 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1589 | out_hdr->sadb_msg_errno = 0; | |
1590 | out_hdr->sadb_msg_reserved = 0; | |
1591 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1592 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1593 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); | |
1594 | ||
1595 | return 0; | |
1596 | } | |
1597 | ||
00fa0233 | 1598 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, |
dd0fc66f | 1599 | gfp_t allocation) |
1da177e4 LT |
1600 | { |
1601 | struct sk_buff *skb; | |
1602 | struct sadb_msg *hdr; | |
1603 | int len, auth_len, enc_len, i; | |
1604 | ||
1605 | auth_len = xfrm_count_auth_supported(); | |
1606 | if (auth_len) { | |
1607 | auth_len *= sizeof(struct sadb_alg); | |
1608 | auth_len += sizeof(struct sadb_supported); | |
1609 | } | |
8ff24541 | 1610 | |
1da177e4 LT |
1611 | enc_len = xfrm_count_enc_supported(); |
1612 | if (enc_len) { | |
1613 | enc_len *= sizeof(struct sadb_alg); | |
1614 | enc_len += sizeof(struct sadb_supported); | |
1615 | } | |
8ff24541 | 1616 | |
1da177e4 LT |
1617 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1618 | ||
1619 | skb = alloc_skb(len + 16, allocation); | |
1620 | if (!skb) | |
1621 | goto out_put_algs; | |
1622 | ||
1623 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1624 | pfkey_hdr_dup(hdr, orig); | |
1625 | hdr->sadb_msg_errno = 0; | |
1626 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1627 | ||
1628 | if (auth_len) { | |
1629 | struct sadb_supported *sp; | |
1630 | struct sadb_alg *ap; | |
1631 | ||
1632 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1633 | ap = (struct sadb_alg *) (sp + 1); | |
1634 | ||
1635 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1636 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1637 | ||
1638 | for (i = 0; ; i++) { | |
1639 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1640 | if (!aalg) | |
1641 | break; | |
1642 | if (aalg->available) | |
1643 | *ap++ = aalg->desc; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | if (enc_len) { | |
1648 | struct sadb_supported *sp; | |
1649 | struct sadb_alg *ap; | |
1650 | ||
1651 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1652 | ap = (struct sadb_alg *) (sp + 1); | |
1653 | ||
1654 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1655 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1656 | ||
1657 | for (i = 0; ; i++) { | |
1658 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1659 | if (!ealg) | |
1660 | break; | |
1661 | if (ealg->available) | |
1662 | *ap++ = ealg->desc; | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | out_put_algs: | |
1667 | return skb; | |
1668 | } | |
1669 | ||
1670 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1671 | { | |
1672 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1673 | struct sk_buff *supp_skb; | |
1674 | ||
1675 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1676 | return -EINVAL; | |
1677 | ||
1678 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1679 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1680 | return -EEXIST; | |
1681 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1682 | } | |
1683 | ||
1684 | xfrm_probe_algs(); | |
8ff24541 | 1685 | |
1da177e4 LT |
1686 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1687 | if (!supp_skb) { | |
1688 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1689 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1690 | ||
1691 | return -ENOBUFS; | |
1692 | } | |
1693 | ||
1694 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk); | |
1695 | ||
1696 | return 0; | |
1697 | } | |
1698 | ||
26b15dad JHS |
1699 | static int key_notify_sa_flush(struct km_event *c) |
1700 | { | |
1701 | struct sk_buff *skb; | |
1702 | struct sadb_msg *hdr; | |
1703 | ||
1704 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1705 | if (!skb) | |
1706 | return -ENOBUFS; | |
1707 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1708 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1709 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad JHS |
1710 | hdr->sadb_msg_seq = c->seq; |
1711 | hdr->sadb_msg_pid = c->pid; | |
1712 | hdr->sadb_msg_version = PF_KEY_V2; | |
1713 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1714 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1715 | ||
1716 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
1717 | ||
1718 | return 0; | |
1719 | } | |
1720 | ||
1da177e4 LT |
1721 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1722 | { | |
1723 | unsigned proto; | |
26b15dad | 1724 | struct km_event c; |
161a09e7 | 1725 | struct xfrm_audit audit_info; |
4aa2e62c | 1726 | int err; |
1da177e4 LT |
1727 | |
1728 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1729 | if (proto == 0) | |
1730 | return -EINVAL; | |
1731 | ||
0c11b942 | 1732 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 1733 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 1734 | audit_info.secid = 0; |
4aa2e62c JL |
1735 | err = xfrm_state_flush(proto, &audit_info); |
1736 | if (err) | |
1737 | return err; | |
bf08867f | 1738 | c.data.proto = proto; |
26b15dad JHS |
1739 | c.seq = hdr->sadb_msg_seq; |
1740 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1741 | c.event = XFRM_MSG_FLUSHSA; |
26b15dad | 1742 | km_state_notify(NULL, &c); |
1da177e4 LT |
1743 | |
1744 | return 0; | |
1745 | } | |
1746 | ||
1da177e4 LT |
1747 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1748 | { | |
83321d6b | 1749 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1750 | struct sk_buff *out_skb; |
1751 | struct sadb_msg *out_hdr; | |
1752 | ||
83321d6b TT |
1753 | if (!pfkey_can_dump(&pfk->sk)) |
1754 | return -ENOBUFS; | |
1755 | ||
050f009e | 1756 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1757 | if (IS_ERR(out_skb)) |
1758 | return PTR_ERR(out_skb); | |
1759 | ||
1760 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1761 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1762 | out_hdr->sadb_msg_type = SADB_DUMP; |
1763 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1764 | out_hdr->sadb_msg_errno = 0; | |
1765 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1766 | out_hdr->sadb_msg_seq = count + 1; |
83321d6b | 1767 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
12a169e7 HX |
1768 | |
1769 | if (pfk->dump.skb) | |
1770 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
1771 | &pfk->sk); | |
1772 | pfk->dump.skb = out_skb; | |
1773 | ||
1da177e4 LT |
1774 | return 0; |
1775 | } | |
1776 | ||
83321d6b TT |
1777 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1778 | { | |
1779 | return xfrm_state_walk(&pfk->dump.u.state, dump_sa, (void *) pfk); | |
1780 | } | |
1781 | ||
1782 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1783 | { | |
1784 | xfrm_state_walk_done(&pfk->dump.u.state); | |
1785 | } | |
1786 | ||
1da177e4 LT |
1787 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1788 | { | |
1789 | u8 proto; | |
83321d6b TT |
1790 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1791 | ||
1792 | if (pfk->dump.dump != NULL) | |
1793 | return -EBUSY; | |
1da177e4 LT |
1794 | |
1795 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1796 | if (proto == 0) | |
1797 | return -EINVAL; | |
1798 | ||
83321d6b TT |
1799 | pfk->dump.msg_version = hdr->sadb_msg_version; |
1800 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
1801 | pfk->dump.dump = pfkey_dump_sa; | |
1802 | pfk->dump.done = pfkey_dump_sa_done; | |
1803 | xfrm_state_walk_init(&pfk->dump.u.state, proto); | |
4c563f76 | 1804 | |
83321d6b | 1805 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1806 | } |
1807 | ||
1808 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
1809 | { | |
1810 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1811 | int satype = hdr->sadb_msg_satype; | |
1812 | ||
1813 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
1814 | /* XXX we mangle packet... */ | |
1815 | hdr->sadb_msg_errno = 0; | |
1816 | if (satype != 0 && satype != 1) | |
1817 | return -EINVAL; | |
1818 | pfk->promisc = satype; | |
1819 | } | |
1820 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL); | |
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1825 | { | |
1826 | int i; | |
1827 | u32 reqid = *(u32*)ptr; | |
1828 | ||
1829 | for (i=0; i<xp->xfrm_nr; i++) { | |
1830 | if (xp->xfrm_vec[i].reqid == reqid) | |
1831 | return -EEXIST; | |
1832 | } | |
1833 | return 0; | |
1834 | } | |
1835 | ||
1836 | static u32 gen_reqid(void) | |
1837 | { | |
4c563f76 | 1838 | struct xfrm_policy_walk walk; |
1da177e4 | 1839 | u32 start; |
4c563f76 | 1840 | int rc; |
1da177e4 LT |
1841 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1842 | ||
1843 | start = reqid; | |
1844 | do { | |
1845 | ++reqid; | |
1846 | if (reqid == 0) | |
1847 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 TT |
1848 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
1849 | rc = xfrm_policy_walk(&walk, check_reqid, (void*)&reqid); | |
1850 | xfrm_policy_walk_done(&walk); | |
1851 | if (rc != -EEXIST) | |
1da177e4 LT |
1852 | return reqid; |
1853 | } while (reqid != start); | |
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static int | |
1858 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1859 | { | |
1860 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; | |
55569ce2 | 1861 | int mode; |
1da177e4 LT |
1862 | |
1863 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1864 | return -ELOOP; | |
1865 | ||
1866 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1867 | return -EINVAL; | |
1868 | ||
1869 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1870 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1871 | return -EINVAL; | |
1872 | t->mode = mode; | |
1da177e4 LT |
1873 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1874 | t->optional = 1; | |
1875 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1876 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1877 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1878 | t->reqid = 0; | |
1879 | if (!t->reqid && !(t->reqid = gen_reqid())) | |
1880 | return -ENOBUFS; | |
1881 | } | |
1882 | ||
1883 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1884 | if (t->mode == XFRM_MODE_TUNNEL) { |
5f95ac91 YH |
1885 | u8 *sa = (u8 *) (rq + 1); |
1886 | int family, socklen; | |
1887 | ||
1888 | family = pfkey_sockaddr_extract((struct sockaddr *)sa, | |
1889 | &t->saddr); | |
1890 | if (!family) | |
1da177e4 | 1891 | return -EINVAL; |
5f95ac91 YH |
1892 | |
1893 | socklen = pfkey_sockaddr_len(family); | |
1894 | if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), | |
1895 | &t->id.daddr) != family) | |
1896 | return -EINVAL; | |
1897 | t->encap_family = family; | |
2718aa7c MK |
1898 | } else |
1899 | t->encap_family = xp->family; | |
1900 | ||
1da177e4 | 1901 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1902 | t->allalgs = 1; |
1da177e4 LT |
1903 | xp->xfrm_nr++; |
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | static int | |
1908 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1909 | { | |
1910 | int err; | |
1911 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1912 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1913 | ||
1914 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | |
1915 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1916 | return err; | |
1917 | len -= rq->sadb_x_ipsecrequest_len; | |
1918 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1919 | } | |
1920 | return 0; | |
1921 | } | |
1922 | ||
df71837d TJ |
1923 | static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) |
1924 | { | |
1925 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1926 | ||
1927 | if (xfrm_ctx) { | |
1928 | int len = sizeof(struct sadb_x_sec_ctx); | |
1929 | len += xfrm_ctx->ctx_len; | |
1930 | return PFKEY_ALIGN8(len); | |
1931 | } | |
1932 | return 0; | |
1933 | } | |
1934 | ||
1da177e4 LT |
1935 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) |
1936 | { | |
2718aa7c | 1937 | struct xfrm_tmpl *t; |
1da177e4 | 1938 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
1939 | int socklen = 0; |
1940 | int i; | |
1941 | ||
1942 | for (i=0; i<xp->xfrm_nr; i++) { | |
1943 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 1944 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 1945 | } |
1da177e4 LT |
1946 | |
1947 | return sizeof(struct sadb_msg) + | |
1948 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 1949 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
1950 | (sockaddr_size * 2) + |
1951 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
1952 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1953 | (socklen * 2) + | |
df71837d | 1954 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
1955 | } |
1956 | ||
1957 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) | |
1958 | { | |
1959 | struct sk_buff *skb; | |
1960 | int size; | |
1961 | ||
1962 | size = pfkey_xfrm_policy2msg_size(xp); | |
1963 | ||
1964 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
1965 | if (skb == NULL) | |
1966 | return ERR_PTR(-ENOBUFS); | |
1967 | ||
1968 | return skb; | |
1969 | } | |
1970 | ||
55569ce2 | 1971 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) |
1da177e4 LT |
1972 | { |
1973 | struct sadb_msg *hdr; | |
1974 | struct sadb_address *addr; | |
1975 | struct sadb_lifetime *lifetime; | |
1976 | struct sadb_x_policy *pol; | |
df71837d TJ |
1977 | struct sadb_x_sec_ctx *sec_ctx; |
1978 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
1979 | int i; |
1980 | int size; | |
1981 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 1982 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
1983 | |
1984 | size = pfkey_xfrm_policy2msg_size(xp); | |
1985 | ||
1986 | /* call should fill header later */ | |
1987 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
1988 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
1989 | ||
1990 | /* src address */ | |
8ff24541 | 1991 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 1992 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 1993 | addr->sadb_address_len = |
1da177e4 LT |
1994 | (sizeof(struct sadb_address)+sockaddr_size)/ |
1995 | sizeof(uint64_t); | |
1996 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
1997 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
1998 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
1999 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2000 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2001 | xp->selector.sport, | |
2002 | (struct sockaddr *) (addr + 1), | |
2003 | xp->family)) | |
1da177e4 LT |
2004 | BUG(); |
2005 | ||
2006 | /* dst address */ | |
8ff24541 | 2007 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
2008 | sizeof(struct sadb_address)+sockaddr_size); |
2009 | addr->sadb_address_len = | |
2010 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2011 | sizeof(uint64_t); | |
2012 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2013 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2014 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2015 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2016 | |
2017 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2018 | (struct sockaddr *) (addr + 1), | |
2019 | xp->family); | |
1da177e4 LT |
2020 | |
2021 | /* hard time */ | |
8ff24541 | 2022 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2023 | sizeof(struct sadb_lifetime)); |
2024 | lifetime->sadb_lifetime_len = | |
2025 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2026 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2027 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2028 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2029 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2030 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2031 | /* soft time */ | |
8ff24541 | 2032 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2033 | sizeof(struct sadb_lifetime)); |
2034 | lifetime->sadb_lifetime_len = | |
2035 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2036 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2037 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2038 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2039 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2040 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2041 | /* current time */ | |
8ff24541 | 2042 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2043 | sizeof(struct sadb_lifetime)); |
2044 | lifetime->sadb_lifetime_len = | |
2045 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2046 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2047 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2048 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2049 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2050 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2051 | ||
2052 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2053 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2054 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2055 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2056 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2057 | if (xp->xfrm_nr) | |
2058 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2059 | else | |
2060 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2061 | } | |
2062 | pol->sadb_x_policy_dir = dir+1; | |
2063 | pol->sadb_x_policy_id = xp->index; | |
2064 | pol->sadb_x_policy_priority = xp->priority; | |
2065 | ||
2066 | for (i=0; i<xp->xfrm_nr; i++) { | |
2067 | struct sadb_x_ipsecrequest *rq; | |
2068 | struct xfrm_tmpl *t = xp->xfrm_vec + i; | |
2069 | int req_size; | |
55569ce2 | 2070 | int mode; |
1da177e4 LT |
2071 | |
2072 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2073 | if (t->mode == XFRM_MODE_TUNNEL) { |
2074 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2075 | req_size += socklen * 2; | |
2076 | } else { | |
1da177e4 | 2077 | size -= 2*socklen; |
e5b56652 | 2078 | } |
1da177e4 LT |
2079 | rq = (void*)skb_put(skb, req_size); |
2080 | pol->sadb_x_policy_len += req_size/8; | |
2081 | memset(rq, 0, sizeof(*rq)); | |
2082 | rq->sadb_x_ipsecrequest_len = req_size; | |
2083 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2084 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2085 | return -EINVAL; | |
fefaa75e | 2086 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2087 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2088 | if (t->reqid) | |
2089 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2090 | if (t->optional) | |
2091 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2092 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2093 | |
7e49e6de | 2094 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2095 | u8 *sa = (void *)(rq + 1); |
2096 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2097 | (struct sockaddr *)sa, | |
2098 | t->encap_family); | |
2099 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2100 | (struct sockaddr *) (sa + socklen), | |
2101 | t->encap_family); | |
1da177e4 LT |
2102 | } |
2103 | } | |
df71837d TJ |
2104 | |
2105 | /* security context */ | |
2106 | if ((xfrm_ctx = xp->security)) { | |
2107 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2108 | ||
2109 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2110 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2111 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2112 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2113 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2114 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2115 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2116 | xfrm_ctx->ctx_len); | |
2117 | } | |
2118 | ||
1da177e4 LT |
2119 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2120 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
55569ce2 KM |
2121 | |
2122 | return 0; | |
1da177e4 LT |
2123 | } |
2124 | ||
26b15dad JHS |
2125 | static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2126 | { | |
2127 | struct sk_buff *out_skb; | |
2128 | struct sadb_msg *out_hdr; | |
2129 | int err; | |
2130 | ||
2131 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
2132 | if (IS_ERR(out_skb)) { | |
2133 | err = PTR_ERR(out_skb); | |
2134 | goto out; | |
2135 | } | |
55569ce2 KM |
2136 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2137 | if (err < 0) | |
2138 | return err; | |
26b15dad JHS |
2139 | |
2140 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2141 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2142 | ||
f60f6b8f | 2143 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2144 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2145 | else | |
2146 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2147 | out_hdr->sadb_msg_errno = 0; | |
2148 | out_hdr->sadb_msg_seq = c->seq; | |
2149 | out_hdr->sadb_msg_pid = c->pid; | |
2150 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2151 | out: | |
2152 | return 0; | |
2153 | ||
2154 | } | |
2155 | ||
1da177e4 LT |
2156 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2157 | { | |
df71837d | 2158 | int err = 0; |
1da177e4 LT |
2159 | struct sadb_lifetime *lifetime; |
2160 | struct sadb_address *sa; | |
2161 | struct sadb_x_policy *pol; | |
2162 | struct xfrm_policy *xp; | |
26b15dad | 2163 | struct km_event c; |
df71837d | 2164 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2165 | |
2166 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2167 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2168 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2169 | return -EINVAL; | |
2170 | ||
2171 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2172 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2173 | return -EINVAL; | |
2174 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2175 | return -EINVAL; | |
2176 | ||
2177 | xp = xfrm_policy_alloc(GFP_KERNEL); | |
2178 | if (xp == NULL) | |
2179 | return -ENOBUFS; | |
2180 | ||
2181 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2182 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2183 | xp->priority = pol->sadb_x_policy_priority; | |
2184 | ||
8ff24541 | 2185 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2186 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
2187 | if (!xp->family) { | |
2188 | err = -EINVAL; | |
2189 | goto out; | |
2190 | } | |
2191 | xp->selector.family = xp->family; | |
2192 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2193 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2194 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2195 | if (xp->selector.sport) | |
8f83f23e | 2196 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2197 | |
8ff24541 | 2198 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2199 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2200 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2201 | ||
2202 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2203 | * in both addresses. | |
2204 | */ | |
2205 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2206 | ||
2207 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2208 | if (xp->selector.dport) | |
8f83f23e | 2209 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2210 | |
df71837d TJ |
2211 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2212 | if (sec_ctx != NULL) { | |
2213 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2214 | ||
2215 | if (!uctx) { | |
2216 | err = -ENOBUFS; | |
2217 | goto out; | |
2218 | } | |
2219 | ||
03e1ad7b | 2220 | err = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
2221 | kfree(uctx); |
2222 | ||
2223 | if (err) | |
2224 | goto out; | |
2225 | } | |
2226 | ||
1da177e4 LT |
2227 | xp->lft.soft_byte_limit = XFRM_INF; |
2228 | xp->lft.hard_byte_limit = XFRM_INF; | |
2229 | xp->lft.soft_packet_limit = XFRM_INF; | |
2230 | xp->lft.hard_packet_limit = XFRM_INF; | |
2231 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2232 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2233 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2234 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2235 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2236 | } | |
2237 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2238 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2239 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2240 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2241 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2242 | } | |
2243 | xp->xfrm_nr = 0; | |
2244 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2245 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2246 | goto out; | |
2247 | ||
1da177e4 LT |
2248 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2249 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2250 | |
ab5f5e8b | 2251 | xfrm_audit_policy_add(xp, err ? 0 : 1, |
2532386f EP |
2252 | audit_get_loginuid(current), |
2253 | audit_get_sessionid(current), 0); | |
161a09e7 | 2254 | |
df71837d TJ |
2255 | if (err) |
2256 | goto out; | |
1da177e4 | 2257 | |
26b15dad | 2258 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2259 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2260 | else |
f60f6b8f | 2261 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2262 | |
26b15dad JHS |
2263 | c.seq = hdr->sadb_msg_seq; |
2264 | c.pid = hdr->sadb_msg_pid; | |
1da177e4 | 2265 | |
26b15dad JHS |
2266 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2267 | xfrm_pol_put(xp); | |
1da177e4 LT |
2268 | return 0; |
2269 | ||
2270 | out: | |
12a169e7 | 2271 | xp->walk.dead = 1; |
64c31b3f | 2272 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2273 | return err; |
2274 | } | |
2275 | ||
2276 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2277 | { | |
2278 | int err; | |
2279 | struct sadb_address *sa; | |
2280 | struct sadb_x_policy *pol; | |
03e1ad7b | 2281 | struct xfrm_policy *xp; |
1da177e4 | 2282 | struct xfrm_selector sel; |
26b15dad | 2283 | struct km_event c; |
df71837d | 2284 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2285 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2286 | |
2287 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2288 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2289 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2290 | return -EINVAL; | |
2291 | ||
2292 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2293 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2294 | return -EINVAL; | |
2295 | ||
2296 | memset(&sel, 0, sizeof(sel)); | |
2297 | ||
8ff24541 | 2298 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2299 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2300 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2301 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2302 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2303 | if (sel.sport) | |
8f83f23e | 2304 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2305 | |
8ff24541 | 2306 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2307 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2308 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2309 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2310 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2311 | if (sel.dport) | |
8f83f23e | 2312 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2313 | |
df71837d | 2314 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
df71837d TJ |
2315 | if (sec_ctx != NULL) { |
2316 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2317 | ||
2318 | if (!uctx) | |
2319 | return -ENOMEM; | |
2320 | ||
03e1ad7b | 2321 | err = security_xfrm_policy_alloc(&pol_ctx, uctx); |
df71837d | 2322 | kfree(uctx); |
df71837d TJ |
2323 | if (err) |
2324 | return err; | |
2db3e47e | 2325 | } |
161a09e7 | 2326 | |
03e1ad7b PM |
2327 | xp = xfrm_policy_bysel_ctx(XFRM_POLICY_TYPE_MAIN, |
2328 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, | |
2329 | 1, &err); | |
2330 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2331 | if (xp == NULL) |
2332 | return -ENOENT; | |
2333 | ||
ab5f5e8b | 2334 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2335 | audit_get_loginuid(current), |
2336 | audit_get_sessionid(current), 0); | |
13fcfbb0 DM |
2337 | |
2338 | if (err) | |
c8c05a8e | 2339 | goto out; |
13fcfbb0 | 2340 | |
26b15dad JHS |
2341 | c.seq = hdr->sadb_msg_seq; |
2342 | c.pid = hdr->sadb_msg_pid; | |
1839faab | 2343 | c.data.byid = 0; |
f60f6b8f | 2344 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2345 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2346 | ||
c8c05a8e | 2347 | out: |
26b15dad JHS |
2348 | xfrm_pol_put(xp); |
2349 | return err; | |
2350 | } | |
2351 | ||
2352 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) | |
2353 | { | |
2354 | int err; | |
2355 | struct sk_buff *out_skb; | |
2356 | struct sadb_msg *out_hdr; | |
2357 | err = 0; | |
2358 | ||
1da177e4 LT |
2359 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2360 | if (IS_ERR(out_skb)) { | |
2361 | err = PTR_ERR(out_skb); | |
2362 | goto out; | |
2363 | } | |
55569ce2 KM |
2364 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2365 | if (err < 0) | |
2366 | goto out; | |
1da177e4 LT |
2367 | |
2368 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2369 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2370 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2371 | out_hdr->sadb_msg_satype = 0; |
2372 | out_hdr->sadb_msg_errno = 0; | |
2373 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2374 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
26b15dad | 2375 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk); |
1da177e4 LT |
2376 | err = 0; |
2377 | ||
2378 | out: | |
1da177e4 LT |
2379 | return err; |
2380 | } | |
2381 | ||
08de61be SS |
2382 | #ifdef CONFIG_NET_KEY_MIGRATE |
2383 | static int pfkey_sockaddr_pair_size(sa_family_t family) | |
2384 | { | |
9e8b4ed8 | 2385 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2386 | } |
2387 | ||
13c1d189 | 2388 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2389 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2390 | u16 *family) | |
2391 | { | |
5f95ac91 YH |
2392 | int af, socklen; |
2393 | ||
13c1d189 | 2394 | if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2395 | return -EINVAL; |
2396 | ||
13c1d189 | 2397 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2398 | if (!af) |
2399 | return -EINVAL; | |
2400 | ||
2401 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2402 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2403 | daddr) != af) |
08de61be | 2404 | return -EINVAL; |
08de61be | 2405 | |
5f95ac91 | 2406 | *family = af; |
08de61be SS |
2407 | return 0; |
2408 | } | |
2409 | ||
2410 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, | |
2411 | struct xfrm_migrate *m) | |
2412 | { | |
2413 | int err; | |
2414 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2415 | int mode; |
08de61be SS |
2416 | |
2417 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2418 | len < rq1->sadb_x_ipsecrequest_len) | |
2419 | return -EINVAL; | |
2420 | ||
2421 | /* old endoints */ | |
13c1d189 AE |
2422 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
2423 | rq1->sadb_x_ipsecrequest_len, | |
2424 | &m->old_saddr, &m->old_daddr, | |
08de61be SS |
2425 | &m->old_family); |
2426 | if (err) | |
2427 | return err; | |
2428 | ||
2429 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2430 | len -= rq1->sadb_x_ipsecrequest_len; | |
2431 | ||
2432 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2433 | len < rq2->sadb_x_ipsecrequest_len) | |
2434 | return -EINVAL; | |
2435 | ||
2436 | /* new endpoints */ | |
13c1d189 AE |
2437 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
2438 | rq2->sadb_x_ipsecrequest_len, | |
2439 | &m->new_saddr, &m->new_daddr, | |
08de61be SS |
2440 | &m->new_family); |
2441 | if (err) | |
2442 | return err; | |
2443 | ||
2444 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2445 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2446 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2447 | return -EINVAL; | |
2448 | ||
2449 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2450 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2451 | return -EINVAL; | |
2452 | m->mode = mode; | |
08de61be SS |
2453 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2454 | ||
2455 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2456 | rq2->sadb_x_ipsecrequest_len)); | |
2457 | } | |
2458 | ||
2459 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2460 | struct sadb_msg *hdr, void **ext_hdrs) | |
2461 | { | |
2462 | int i, len, ret, err = -EINVAL; | |
2463 | u8 dir; | |
2464 | struct sadb_address *sa; | |
13c1d189 | 2465 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2466 | struct sadb_x_policy *pol; |
2467 | struct sadb_x_ipsecrequest *rq; | |
2468 | struct xfrm_selector sel; | |
2469 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2470 | struct xfrm_kmaddress k; |
08de61be SS |
2471 | |
2472 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2473 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2474 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2475 | err = -EINVAL; | |
2476 | goto out; | |
2477 | } | |
2478 | ||
13c1d189 | 2479 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2480 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2481 | |
2482 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2483 | err = -EINVAL; | |
2484 | goto out; | |
2485 | } | |
2486 | ||
13c1d189 AE |
2487 | if (kma) { |
2488 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2489 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2490 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2491 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2492 | &k.local, &k.remote, &k.family); | |
2493 | if (ret < 0) { | |
2494 | err = ret; | |
2495 | goto out; | |
2496 | } | |
2497 | } | |
2498 | ||
08de61be SS |
2499 | dir = pol->sadb_x_policy_dir - 1; |
2500 | memset(&sel, 0, sizeof(sel)); | |
2501 | ||
2502 | /* set source address info of selector */ | |
2503 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2504 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2505 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2506 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2507 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2508 | if (sel.sport) | |
582ee43d | 2509 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2510 | |
2511 | /* set destination address info of selector */ | |
2512 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], | |
2513 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2514 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2515 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2516 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2517 | if (sel.dport) | |
582ee43d | 2518 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2519 | |
2520 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2521 | ||
2522 | /* extract ipsecrequests */ | |
2523 | i = 0; | |
2524 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2525 | ||
2526 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2527 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2528 | if (ret < 0) { | |
2529 | err = ret; | |
2530 | goto out; | |
2531 | } else { | |
2532 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2533 | len -= ret; | |
2534 | i++; | |
2535 | } | |
2536 | } | |
2537 | ||
2538 | if (!i || len > 0) { | |
2539 | err = -EINVAL; | |
2540 | goto out; | |
2541 | } | |
2542 | ||
13c1d189 AE |
2543 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
2544 | kma ? &k : NULL); | |
08de61be SS |
2545 | |
2546 | out: | |
2547 | return err; | |
2548 | } | |
2549 | #else | |
2550 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2551 | struct sadb_msg *hdr, void **ext_hdrs) | |
2552 | { | |
2553 | return -ENOPROTOOPT; | |
2554 | } | |
2555 | #endif | |
2556 | ||
2557 | ||
1da177e4 LT |
2558 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2559 | { | |
77d8d7a6 | 2560 | unsigned int dir; |
215a2dd3 | 2561 | int err = 0, delete; |
1da177e4 LT |
2562 | struct sadb_x_policy *pol; |
2563 | struct xfrm_policy *xp; | |
26b15dad | 2564 | struct km_event c; |
1da177e4 LT |
2565 | |
2566 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2567 | return -EINVAL; | |
2568 | ||
77d8d7a6 HX |
2569 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2570 | if (dir >= XFRM_POLICY_MAX) | |
2571 | return -EINVAL; | |
2572 | ||
215a2dd3 | 2573 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
f7b6983f | 2574 | xp = xfrm_policy_byid(XFRM_POLICY_TYPE_MAIN, dir, pol->sadb_x_policy_id, |
215a2dd3 | 2575 | delete, &err); |
1da177e4 LT |
2576 | if (xp == NULL) |
2577 | return -ENOENT; | |
2578 | ||
215a2dd3 | 2579 | if (delete) { |
ab5f5e8b | 2580 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2581 | audit_get_loginuid(current), |
2582 | audit_get_sessionid(current), 0); | |
1da177e4 | 2583 | |
215a2dd3 EP |
2584 | if (err) |
2585 | goto out; | |
2586 | c.seq = hdr->sadb_msg_seq; | |
2587 | c.pid = hdr->sadb_msg_pid; | |
bf08867f | 2588 | c.data.byid = 1; |
f60f6b8f | 2589 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2590 | km_policy_notify(xp, dir, &c); |
26b15dad | 2591 | } else { |
77d8d7a6 | 2592 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2593 | } |
1da177e4 | 2594 | |
215a2dd3 | 2595 | out: |
1da177e4 LT |
2596 | xfrm_pol_put(xp); |
2597 | return err; | |
2598 | } | |
2599 | ||
2600 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2601 | { | |
83321d6b | 2602 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2603 | struct sk_buff *out_skb; |
2604 | struct sadb_msg *out_hdr; | |
55569ce2 | 2605 | int err; |
1da177e4 | 2606 | |
83321d6b TT |
2607 | if (!pfkey_can_dump(&pfk->sk)) |
2608 | return -ENOBUFS; | |
2609 | ||
1da177e4 LT |
2610 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2611 | if (IS_ERR(out_skb)) | |
2612 | return PTR_ERR(out_skb); | |
2613 | ||
55569ce2 KM |
2614 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2615 | if (err < 0) | |
2616 | return err; | |
1da177e4 LT |
2617 | |
2618 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2619 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2620 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2621 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2622 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2623 | out_hdr->sadb_msg_seq = count + 1; |
83321d6b | 2624 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
12a169e7 HX |
2625 | |
2626 | if (pfk->dump.skb) | |
2627 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
2628 | &pfk->sk); | |
2629 | pfk->dump.skb = out_skb; | |
2630 | ||
1da177e4 LT |
2631 | return 0; |
2632 | } | |
2633 | ||
83321d6b TT |
2634 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2635 | { | |
2636 | return xfrm_policy_walk(&pfk->dump.u.policy, dump_sp, (void *) pfk); | |
2637 | } | |
2638 | ||
2639 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2640 | { | |
2641 | xfrm_policy_walk_done(&pfk->dump.u.policy); | |
2642 | } | |
2643 | ||
1da177e4 LT |
2644 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2645 | { | |
83321d6b | 2646 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2647 | |
83321d6b TT |
2648 | if (pfk->dump.dump != NULL) |
2649 | return -EBUSY; | |
1da177e4 | 2650 | |
83321d6b TT |
2651 | pfk->dump.msg_version = hdr->sadb_msg_version; |
2652 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
2653 | pfk->dump.dump = pfkey_dump_sp; | |
2654 | pfk->dump.done = pfkey_dump_sp_done; | |
2655 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
2656 | ||
2657 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2658 | } |
2659 | ||
26b15dad | 2660 | static int key_notify_policy_flush(struct km_event *c) |
1da177e4 LT |
2661 | { |
2662 | struct sk_buff *skb_out; | |
26b15dad | 2663 | struct sadb_msg *hdr; |
1da177e4 | 2664 | |
26b15dad | 2665 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2666 | if (!skb_out) |
2667 | return -ENOBUFS; | |
26b15dad | 2668 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2669 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad JHS |
2670 | hdr->sadb_msg_seq = c->seq; |
2671 | hdr->sadb_msg_pid = c->pid; | |
2672 | hdr->sadb_msg_version = PF_KEY_V2; | |
2673 | hdr->sadb_msg_errno = (uint8_t) 0; | |
2674 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
2675 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
2676 | return 0; | |
1da177e4 | 2677 | |
26b15dad JHS |
2678 | } |
2679 | ||
2680 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) | |
2681 | { | |
2682 | struct km_event c; | |
161a09e7 | 2683 | struct xfrm_audit audit_info; |
4aa2e62c | 2684 | int err; |
1da177e4 | 2685 | |
0c11b942 | 2686 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 2687 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 2688 | audit_info.secid = 0; |
4aa2e62c JL |
2689 | err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info); |
2690 | if (err) | |
2691 | return err; | |
f7b6983f | 2692 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2693 | c.event = XFRM_MSG_FLUSHPOLICY; |
26b15dad JHS |
2694 | c.pid = hdr->sadb_msg_pid; |
2695 | c.seq = hdr->sadb_msg_seq; | |
2696 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
2697 | |
2698 | return 0; | |
2699 | } | |
2700 | ||
2701 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
2702 | struct sadb_msg *hdr, void **ext_hdrs); | |
2703 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { | |
2704 | [SADB_RESERVED] = pfkey_reserved, | |
2705 | [SADB_GETSPI] = pfkey_getspi, | |
2706 | [SADB_UPDATE] = pfkey_add, | |
2707 | [SADB_ADD] = pfkey_add, | |
2708 | [SADB_DELETE] = pfkey_delete, | |
2709 | [SADB_GET] = pfkey_get, | |
2710 | [SADB_ACQUIRE] = pfkey_acquire, | |
2711 | [SADB_REGISTER] = pfkey_register, | |
2712 | [SADB_EXPIRE] = NULL, | |
2713 | [SADB_FLUSH] = pfkey_flush, | |
2714 | [SADB_DUMP] = pfkey_dump, | |
2715 | [SADB_X_PROMISC] = pfkey_promisc, | |
2716 | [SADB_X_PCHANGE] = NULL, | |
2717 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2718 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2719 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2720 | [SADB_X_SPDGET] = pfkey_spdget, | |
2721 | [SADB_X_SPDACQUIRE] = NULL, | |
2722 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2723 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2724 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2725 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2726 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2727 | }; |
2728 | ||
2729 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) | |
2730 | { | |
2731 | void *ext_hdrs[SADB_EXT_MAX]; | |
2732 | int err; | |
2733 | ||
2734 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
2735 | BROADCAST_PROMISC_ONLY, NULL); | |
2736 | ||
2737 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2738 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2739 | if (!err) { | |
2740 | err = -EOPNOTSUPP; | |
2741 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2742 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2743 | } | |
2744 | return err; | |
2745 | } | |
2746 | ||
2747 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2748 | { | |
2749 | struct sadb_msg *hdr = NULL; | |
2750 | ||
2751 | if (skb->len < sizeof(*hdr)) { | |
2752 | *errp = -EMSGSIZE; | |
2753 | } else { | |
2754 | hdr = (struct sadb_msg *) skb->data; | |
2755 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2756 | hdr->sadb_msg_reserved != 0 || | |
2757 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2758 | hdr->sadb_msg_type > SADB_MAX)) { | |
2759 | hdr = NULL; | |
2760 | *errp = -EINVAL; | |
2761 | } else if (hdr->sadb_msg_len != (skb->len / | |
2762 | sizeof(uint64_t)) || | |
2763 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2764 | sizeof(uint64_t))) { | |
2765 | hdr = NULL; | |
2766 | *errp = -EMSGSIZE; | |
2767 | } else { | |
2768 | *errp = 0; | |
2769 | } | |
2770 | } | |
2771 | return hdr; | |
2772 | } | |
2773 | ||
2774 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2775 | { | |
f398035f HX |
2776 | unsigned int id = d->desc.sadb_alg_id; |
2777 | ||
2778 | if (id >= sizeof(t->aalgos) * 8) | |
2779 | return 0; | |
2780 | ||
2781 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2782 | } |
2783 | ||
2784 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) | |
2785 | { | |
f398035f HX |
2786 | unsigned int id = d->desc.sadb_alg_id; |
2787 | ||
2788 | if (id >= sizeof(t->ealgos) * 8) | |
2789 | return 0; | |
2790 | ||
2791 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2792 | } |
2793 | ||
2794 | static int count_ah_combs(struct xfrm_tmpl *t) | |
2795 | { | |
2796 | int i, sz = 0; | |
2797 | ||
2798 | for (i = 0; ; i++) { | |
2799 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2800 | if (!aalg) | |
2801 | break; | |
2802 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2803 | sz += sizeof(struct sadb_comb); | |
2804 | } | |
2805 | return sz + sizeof(struct sadb_prop); | |
2806 | } | |
2807 | ||
2808 | static int count_esp_combs(struct xfrm_tmpl *t) | |
2809 | { | |
2810 | int i, k, sz = 0; | |
2811 | ||
2812 | for (i = 0; ; i++) { | |
2813 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2814 | if (!ealg) | |
2815 | break; | |
8ff24541 | 2816 | |
1da177e4 LT |
2817 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2818 | continue; | |
8ff24541 | 2819 | |
1da177e4 LT |
2820 | for (k = 1; ; k++) { |
2821 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2822 | if (!aalg) | |
2823 | break; | |
8ff24541 | 2824 | |
1da177e4 LT |
2825 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2826 | sz += sizeof(struct sadb_comb); | |
2827 | } | |
2828 | } | |
2829 | return sz + sizeof(struct sadb_prop); | |
2830 | } | |
2831 | ||
2832 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2833 | { | |
2834 | struct sadb_prop *p; | |
2835 | int i; | |
2836 | ||
2837 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2838 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2839 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2840 | p->sadb_prop_replay = 32; | |
2841 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2842 | ||
2843 | for (i = 0; ; i++) { | |
2844 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
2845 | if (!aalg) | |
2846 | break; | |
2847 | ||
2848 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | |
2849 | struct sadb_comb *c; | |
2850 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2851 | memset(c, 0, sizeof(*c)); | |
2852 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2853 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2854 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2855 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2856 | c->sadb_comb_hard_addtime = 24*60*60; | |
2857 | c->sadb_comb_soft_addtime = 20*60*60; | |
2858 | c->sadb_comb_hard_usetime = 8*60*60; | |
2859 | c->sadb_comb_soft_usetime = 7*60*60; | |
2860 | } | |
2861 | } | |
2862 | } | |
2863 | ||
2864 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) | |
2865 | { | |
2866 | struct sadb_prop *p; | |
2867 | int i, k; | |
2868 | ||
2869 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2870 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2871 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2872 | p->sadb_prop_replay = 32; | |
2873 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2874 | ||
2875 | for (i=0; ; i++) { | |
2876 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
2877 | if (!ealg) | |
2878 | break; | |
8ff24541 | 2879 | |
1da177e4 LT |
2880 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2881 | continue; | |
8ff24541 | 2882 | |
1da177e4 LT |
2883 | for (k = 1; ; k++) { |
2884 | struct sadb_comb *c; | |
2885 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); | |
2886 | if (!aalg) | |
2887 | break; | |
2888 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | |
2889 | continue; | |
2890 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2891 | memset(c, 0, sizeof(*c)); | |
2892 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2893 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2894 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2895 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2896 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2897 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2898 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2899 | c->sadb_comb_hard_addtime = 24*60*60; | |
2900 | c->sadb_comb_soft_addtime = 20*60*60; | |
2901 | c->sadb_comb_hard_usetime = 8*60*60; | |
2902 | c->sadb_comb_soft_usetime = 7*60*60; | |
2903 | } | |
2904 | } | |
2905 | } | |
2906 | ||
26b15dad JHS |
2907 | static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) |
2908 | { | |
2909 | return 0; | |
2910 | } | |
2911 | ||
2912 | static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) | |
1da177e4 LT |
2913 | { |
2914 | struct sk_buff *out_skb; | |
2915 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2916 | int hard; |
2917 | int hsc; | |
2918 | ||
bf08867f | 2919 | hard = c->data.hard; |
26b15dad JHS |
2920 | if (hard) |
2921 | hsc = 2; | |
2922 | else | |
2923 | hsc = 1; | |
1da177e4 | 2924 | |
050f009e | 2925 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
2926 | if (IS_ERR(out_skb)) |
2927 | return PTR_ERR(out_skb); | |
2928 | ||
2929 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2930 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2931 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
2932 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2933 | out_hdr->sadb_msg_errno = 0; | |
2934 | out_hdr->sadb_msg_reserved = 0; | |
2935 | out_hdr->sadb_msg_seq = 0; | |
2936 | out_hdr->sadb_msg_pid = 0; | |
2937 | ||
2938 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
2939 | return 0; | |
2940 | } | |
2941 | ||
26b15dad JHS |
2942 | static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) |
2943 | { | |
99c6f60e JHS |
2944 | if (atomic_read(&pfkey_socks_nr) == 0) |
2945 | return 0; | |
2946 | ||
26b15dad | 2947 | switch (c->event) { |
f60f6b8f | 2948 | case XFRM_MSG_EXPIRE: |
26b15dad | 2949 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
2950 | case XFRM_MSG_DELSA: |
2951 | case XFRM_MSG_NEWSA: | |
2952 | case XFRM_MSG_UPDSA: | |
26b15dad | 2953 | return key_notify_sa(x, c); |
f60f6b8f | 2954 | case XFRM_MSG_FLUSHSA: |
26b15dad | 2955 | return key_notify_sa_flush(c); |
d51d081d JHS |
2956 | case XFRM_MSG_NEWAE: /* not yet supported */ |
2957 | break; | |
26b15dad JHS |
2958 | default: |
2959 | printk("pfkey: Unknown SA event %d\n", c->event); | |
2960 | break; | |
2961 | } | |
2962 | ||
2963 | return 0; | |
2964 | } | |
2965 | ||
2966 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2967 | { | |
f7b6983f MN |
2968 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
2969 | return 0; | |
2970 | ||
26b15dad | 2971 | switch (c->event) { |
f60f6b8f | 2972 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 2973 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
2974 | case XFRM_MSG_DELPOLICY: |
2975 | case XFRM_MSG_NEWPOLICY: | |
2976 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 2977 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 2978 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
2979 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
2980 | break; | |
26b15dad JHS |
2981 | return key_notify_policy_flush(c); |
2982 | default: | |
2983 | printk("pfkey: Unknown policy event %d\n", c->event); | |
2984 | break; | |
2985 | } | |
2986 | ||
2987 | return 0; | |
2988 | } | |
2989 | ||
1da177e4 LT |
2990 | static u32 get_acqseq(void) |
2991 | { | |
2992 | u32 res; | |
2993 | static u32 acqseq; | |
2994 | static DEFINE_SPINLOCK(acqseq_lock); | |
2995 | ||
2996 | spin_lock_bh(&acqseq_lock); | |
2997 | res = (++acqseq ? : ++acqseq); | |
2998 | spin_unlock_bh(&acqseq_lock); | |
2999 | return res; | |
3000 | } | |
3001 | ||
3002 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | |
3003 | { | |
3004 | struct sk_buff *skb; | |
3005 | struct sadb_msg *hdr; | |
3006 | struct sadb_address *addr; | |
3007 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3008 | int sockaddr_size; |
3009 | int size; | |
4e2ba18e VY |
3010 | struct sadb_x_sec_ctx *sec_ctx; |
3011 | struct xfrm_sec_ctx *xfrm_ctx; | |
3012 | int ctx_size = 0; | |
8ff24541 | 3013 | |
1da177e4 LT |
3014 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3015 | if (!sockaddr_size) | |
3016 | return -EINVAL; | |
3017 | ||
3018 | size = sizeof(struct sadb_msg) + | |
3019 | (sizeof(struct sadb_address) * 2) + | |
3020 | (sockaddr_size * 2) + | |
3021 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3022 | |
1da177e4 LT |
3023 | if (x->id.proto == IPPROTO_AH) |
3024 | size += count_ah_combs(t); | |
3025 | else if (x->id.proto == IPPROTO_ESP) | |
3026 | size += count_esp_combs(t); | |
3027 | ||
4e2ba18e VY |
3028 | if ((xfrm_ctx = x->security)) { |
3029 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3030 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3031 | } | |
3032 | ||
1da177e4 LT |
3033 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3034 | if (skb == NULL) | |
3035 | return -ENOMEM; | |
8ff24541 | 3036 | |
1da177e4 LT |
3037 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3038 | hdr->sadb_msg_version = PF_KEY_V2; | |
3039 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3040 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3041 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3042 | hdr->sadb_msg_errno = 0; | |
3043 | hdr->sadb_msg_reserved = 0; | |
3044 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3045 | hdr->sadb_msg_pid = 0; | |
3046 | ||
3047 | /* src address */ | |
8ff24541 | 3048 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 3049 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 3050 | addr->sadb_address_len = |
1da177e4 LT |
3051 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3052 | sizeof(uint64_t); | |
3053 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3054 | addr->sadb_address_proto = 0; | |
3055 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3056 | addr->sadb_address_prefixlen = |
3057 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3058 | (struct sockaddr *) (addr + 1), | |
3059 | x->props.family); | |
3060 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3061 | BUG(); |
8ff24541 | 3062 | |
1da177e4 | 3063 | /* dst address */ |
8ff24541 | 3064 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
3065 | sizeof(struct sadb_address)+sockaddr_size); |
3066 | addr->sadb_address_len = | |
3067 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3068 | sizeof(uint64_t); | |
3069 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3070 | addr->sadb_address_proto = 0; | |
3071 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3072 | addr->sadb_address_prefixlen = |
3073 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3074 | (struct sockaddr *) (addr + 1), | |
3075 | x->props.family); | |
3076 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3077 | BUG(); |
3078 | ||
3079 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
3080 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
3081 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3082 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3083 | pol->sadb_x_policy_dir = dir+1; | |
3084 | pol->sadb_x_policy_id = xp->index; | |
3085 | ||
3086 | /* Set sadb_comb's. */ | |
3087 | if (x->id.proto == IPPROTO_AH) | |
3088 | dump_ah_combs(skb, t); | |
3089 | else if (x->id.proto == IPPROTO_ESP) | |
3090 | dump_esp_combs(skb, t); | |
3091 | ||
4e2ba18e VY |
3092 | /* security context */ |
3093 | if (xfrm_ctx) { | |
3094 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
3095 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
3096 | sec_ctx->sadb_x_sec_len = | |
3097 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3098 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3099 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3100 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3101 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3102 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3103 | xfrm_ctx->ctx_len); | |
3104 | } | |
3105 | ||
1da177e4 LT |
3106 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); |
3107 | } | |
3108 | ||
cb969f07 | 3109 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3110 | u8 *data, int len, int *dir) |
1da177e4 LT |
3111 | { |
3112 | struct xfrm_policy *xp; | |
3113 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3114 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3115 | |
cb969f07 | 3116 | switch (sk->sk_family) { |
1da177e4 LT |
3117 | case AF_INET: |
3118 | if (opt != IP_IPSEC_POLICY) { | |
3119 | *dir = -EOPNOTSUPP; | |
3120 | return NULL; | |
3121 | } | |
3122 | break; | |
3123 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3124 | case AF_INET6: | |
3125 | if (opt != IPV6_IPSEC_POLICY) { | |
3126 | *dir = -EOPNOTSUPP; | |
3127 | return NULL; | |
3128 | } | |
3129 | break; | |
3130 | #endif | |
3131 | default: | |
3132 | *dir = -EINVAL; | |
3133 | return NULL; | |
3134 | } | |
3135 | ||
3136 | *dir = -EINVAL; | |
3137 | ||
3138 | if (len < sizeof(struct sadb_x_policy) || | |
3139 | pol->sadb_x_policy_len*8 > len || | |
3140 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3141 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3142 | return NULL; | |
3143 | ||
3144 | xp = xfrm_policy_alloc(GFP_ATOMIC); | |
3145 | if (xp == NULL) { | |
3146 | *dir = -ENOBUFS; | |
3147 | return NULL; | |
3148 | } | |
3149 | ||
3150 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3151 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3152 | ||
3153 | xp->lft.soft_byte_limit = XFRM_INF; | |
3154 | xp->lft.hard_byte_limit = XFRM_INF; | |
3155 | xp->lft.soft_packet_limit = XFRM_INF; | |
3156 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3157 | xp->family = sk->sk_family; |
1da177e4 LT |
3158 | |
3159 | xp->xfrm_nr = 0; | |
3160 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3161 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3162 | goto out; | |
3163 | ||
df71837d TJ |
3164 | /* security context too */ |
3165 | if (len >= (pol->sadb_x_policy_len*8 + | |
3166 | sizeof(struct sadb_x_sec_ctx))) { | |
3167 | char *p = (char *)pol; | |
3168 | struct xfrm_user_sec_ctx *uctx; | |
3169 | ||
3170 | p += pol->sadb_x_policy_len*8; | |
3171 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3172 | if (len < pol->sadb_x_policy_len*8 + | |
cb969f07 VY |
3173 | sec_ctx->sadb_x_sec_len) { |
3174 | *dir = -EINVAL; | |
df71837d | 3175 | goto out; |
cb969f07 | 3176 | } |
df71837d TJ |
3177 | if ((*dir = verify_sec_ctx_len(p))) |
3178 | goto out; | |
3179 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
03e1ad7b | 3180 | *dir = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
3181 | kfree(uctx); |
3182 | ||
3183 | if (*dir) | |
3184 | goto out; | |
3185 | } | |
3186 | ||
1da177e4 LT |
3187 | *dir = pol->sadb_x_policy_dir-1; |
3188 | return xp; | |
3189 | ||
3190 | out: | |
64c31b3f | 3191 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3192 | return NULL; |
3193 | } | |
3194 | ||
5d36b180 | 3195 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3196 | { |
3197 | struct sk_buff *skb; | |
3198 | struct sadb_msg *hdr; | |
3199 | struct sadb_sa *sa; | |
3200 | struct sadb_address *addr; | |
3201 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3202 | int sockaddr_size; |
3203 | int size; | |
3204 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3205 | struct xfrm_encap_tmpl *natt = NULL; | |
3206 | ||
3207 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3208 | if (!sockaddr_size) | |
3209 | return -EINVAL; | |
3210 | ||
3211 | if (!satype) | |
3212 | return -EINVAL; | |
3213 | ||
3214 | if (!x->encap) | |
3215 | return -EINVAL; | |
3216 | ||
3217 | natt = x->encap; | |
3218 | ||
3219 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3220 | * | |
3221 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3222 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3223 | */ | |
8ff24541 | 3224 | |
1da177e4 LT |
3225 | size = sizeof(struct sadb_msg) + |
3226 | sizeof(struct sadb_sa) + | |
3227 | (sizeof(struct sadb_address) * 2) + | |
3228 | (sockaddr_size * 2) + | |
3229 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3230 | |
1da177e4 LT |
3231 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3232 | if (skb == NULL) | |
3233 | return -ENOMEM; | |
8ff24541 | 3234 | |
1da177e4 LT |
3235 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3236 | hdr->sadb_msg_version = PF_KEY_V2; | |
3237 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3238 | hdr->sadb_msg_satype = satype; | |
3239 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3240 | hdr->sadb_msg_errno = 0; | |
3241 | hdr->sadb_msg_reserved = 0; | |
3242 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3243 | hdr->sadb_msg_pid = 0; | |
3244 | ||
3245 | /* SA */ | |
3246 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
3247 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
3248 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3249 | sa->sadb_sa_spi = x->id.spi; | |
3250 | sa->sadb_sa_replay = 0; | |
3251 | sa->sadb_sa_state = 0; | |
3252 | sa->sadb_sa_auth = 0; | |
3253 | sa->sadb_sa_encrypt = 0; | |
3254 | sa->sadb_sa_flags = 0; | |
3255 | ||
3256 | /* ADDRESS_SRC (old addr) */ | |
3257 | addr = (struct sadb_address*) | |
3258 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3259 | addr->sadb_address_len = |
1da177e4 LT |
3260 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3261 | sizeof(uint64_t); | |
3262 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3263 | addr->sadb_address_proto = 0; | |
3264 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3265 | addr->sadb_address_prefixlen = |
3266 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3267 | (struct sockaddr *) (addr + 1), | |
3268 | x->props.family); | |
3269 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3270 | BUG(); |
3271 | ||
3272 | /* NAT_T_SPORT (old port) */ | |
3273 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3274 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3275 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3276 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3277 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3278 | ||
3279 | /* ADDRESS_DST (new addr) */ | |
3280 | addr = (struct sadb_address*) | |
3281 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3282 | addr->sadb_address_len = |
1da177e4 LT |
3283 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3284 | sizeof(uint64_t); | |
3285 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3286 | addr->sadb_address_proto = 0; | |
3287 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3288 | addr->sadb_address_prefixlen = |
3289 | pfkey_sockaddr_fill(ipaddr, 0, | |
3290 | (struct sockaddr *) (addr + 1), | |
3291 | x->props.family); | |
3292 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3293 | BUG(); |
3294 | ||
3295 | /* NAT_T_DPORT (new port) */ | |
3296 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3297 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3298 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3299 | n_port->sadb_x_nat_t_port_port = sport; | |
3300 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3301 | ||
3302 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL); | |
3303 | } | |
3304 | ||
08de61be SS |
3305 | #ifdef CONFIG_NET_KEY_MIGRATE |
3306 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
3307 | struct xfrm_selector *sel) | |
3308 | { | |
3309 | struct sadb_address *addr; | |
08de61be SS |
3310 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); |
3311 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; | |
3312 | addr->sadb_address_exttype = type; | |
3313 | addr->sadb_address_proto = sel->proto; | |
3314 | addr->sadb_address_reserved = 0; | |
3315 | ||
3316 | switch (type) { | |
3317 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3318 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3319 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3320 | (struct sockaddr *)(addr + 1), | |
3321 | sel->family); | |
08de61be SS |
3322 | break; |
3323 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3324 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3325 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3326 | (struct sockaddr *)(addr + 1), | |
3327 | sel->family); | |
08de61be SS |
3328 | break; |
3329 | default: | |
3330 | return -EINVAL; | |
3331 | } | |
3332 | ||
3333 | return 0; | |
3334 | } | |
3335 | ||
13c1d189 AE |
3336 | |
3337 | static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k) | |
3338 | { | |
3339 | struct sadb_x_kmaddress *kma; | |
3340 | u8 *sa; | |
3341 | int family = k->family; | |
3342 | int socklen = pfkey_sockaddr_len(family); | |
3343 | int size_req; | |
3344 | ||
3345 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3346 | pfkey_sockaddr_pair_size(family)); | |
3347 | ||
3348 | kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req); | |
3349 | memset(kma, 0, size_req); | |
3350 | kma->sadb_x_kmaddress_len = size_req / 8; | |
3351 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3352 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3353 | ||
3354 | sa = (u8 *)(kma + 1); | |
3355 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3356 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3357 | return -EINVAL; | |
3358 | ||
3359 | return 0; | |
3360 | } | |
3361 | ||
08de61be SS |
3362 | static int set_ipsecrequest(struct sk_buff *skb, |
3363 | uint8_t proto, uint8_t mode, int level, | |
3364 | uint32_t reqid, uint8_t family, | |
3365 | xfrm_address_t *src, xfrm_address_t *dst) | |
3366 | { | |
3367 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3368 | u8 *sa; |
3369 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3370 | int size_req; |
3371 | ||
3372 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3373 | pfkey_sockaddr_pair_size(family); | |
3374 | ||
3375 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); | |
3376 | memset(rq, 0, size_req); | |
3377 | rq->sadb_x_ipsecrequest_len = size_req; | |
3378 | rq->sadb_x_ipsecrequest_proto = proto; | |
3379 | rq->sadb_x_ipsecrequest_mode = mode; | |
3380 | rq->sadb_x_ipsecrequest_level = level; | |
3381 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3382 | ||
e5b56652 YH |
3383 | sa = (u8 *) (rq + 1); |
3384 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3385 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3386 | return -EINVAL; |
08de61be SS |
3387 | |
3388 | return 0; | |
3389 | } | |
3390 | #endif | |
3391 | ||
3392 | #ifdef CONFIG_NET_KEY_MIGRATE | |
3393 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
3394 | struct xfrm_migrate *m, int num_bundles, |
3395 | struct xfrm_kmaddress *k) | |
08de61be SS |
3396 | { |
3397 | int i; | |
3398 | int sasize_sel; | |
3399 | int size = 0; | |
3400 | int size_pol = 0; | |
3401 | struct sk_buff *skb; | |
3402 | struct sadb_msg *hdr; | |
3403 | struct sadb_x_policy *pol; | |
3404 | struct xfrm_migrate *mp; | |
3405 | ||
3406 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3407 | return 0; | |
3408 | ||
3409 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3410 | return -EINVAL; | |
3411 | ||
13c1d189 AE |
3412 | if (k != NULL) { |
3413 | /* addresses for KM */ | |
3414 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3415 | pfkey_sockaddr_pair_size(k->family)); | |
3416 | } | |
3417 | ||
08de61be SS |
3418 | /* selector */ |
3419 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3420 | if (!sasize_sel) | |
3421 | return -EINVAL; | |
3422 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3423 | ||
3424 | /* policy info */ | |
3425 | size_pol += sizeof(struct sadb_x_policy); | |
3426 | ||
3427 | /* ipsecrequests */ | |
3428 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3429 | /* old locator pair */ | |
3430 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3431 | pfkey_sockaddr_pair_size(mp->old_family); | |
3432 | /* new locator pair */ | |
3433 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3434 | pfkey_sockaddr_pair_size(mp->new_family); | |
3435 | } | |
3436 | ||
3437 | size += sizeof(struct sadb_msg) + size_pol; | |
3438 | ||
3439 | /* alloc buffer */ | |
3440 | skb = alloc_skb(size, GFP_ATOMIC); | |
3441 | if (skb == NULL) | |
3442 | return -ENOMEM; | |
3443 | ||
3444 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); | |
3445 | hdr->sadb_msg_version = PF_KEY_V2; | |
3446 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3447 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3448 | hdr->sadb_msg_len = size / 8; | |
3449 | hdr->sadb_msg_errno = 0; | |
3450 | hdr->sadb_msg_reserved = 0; | |
3451 | hdr->sadb_msg_seq = 0; | |
3452 | hdr->sadb_msg_pid = 0; | |
3453 | ||
13c1d189 AE |
3454 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3455 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
3456 | return -EINVAL; | |
3457 | ||
08de61be SS |
3458 | /* selector src */ |
3459 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3460 | ||
3461 | /* selector dst */ | |
3462 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3463 | ||
3464 | /* policy information */ | |
3465 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); | |
3466 | pol->sadb_x_policy_len = size_pol / 8; | |
3467 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3468 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3469 | pol->sadb_x_policy_dir = dir + 1; | |
3470 | pol->sadb_x_policy_id = 0; | |
3471 | pol->sadb_x_policy_priority = 0; | |
3472 | ||
3473 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3474 | /* old ipsecrequest */ | |
55569ce2 KM |
3475 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3476 | if (mode < 0) | |
d4782c32 | 3477 | goto err; |
55569ce2 | 3478 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3479 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3480 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3481 | &mp->old_saddr, &mp->old_daddr) < 0) |
3482 | goto err; | |
08de61be SS |
3483 | |
3484 | /* new ipsecrequest */ | |
55569ce2 | 3485 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3486 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3487 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3488 | &mp->new_saddr, &mp->new_daddr) < 0) |
3489 | goto err; | |
08de61be SS |
3490 | } |
3491 | ||
3492 | /* broadcast migrate message to sockets */ | |
3493 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL); | |
3494 | ||
3495 | return 0; | |
d4782c32 PM |
3496 | |
3497 | err: | |
3498 | kfree_skb(skb); | |
3499 | return -EINVAL; | |
08de61be SS |
3500 | } |
3501 | #else | |
3502 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
3503 | struct xfrm_migrate *m, int num_bundles, |
3504 | struct xfrm_kmaddress *k) | |
08de61be SS |
3505 | { |
3506 | return -ENOPROTOOPT; | |
3507 | } | |
3508 | #endif | |
3509 | ||
1da177e4 LT |
3510 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3511 | struct socket *sock, struct msghdr *msg, size_t len) | |
3512 | { | |
3513 | struct sock *sk = sock->sk; | |
3514 | struct sk_buff *skb = NULL; | |
3515 | struct sadb_msg *hdr = NULL; | |
3516 | int err; | |
3517 | ||
3518 | err = -EOPNOTSUPP; | |
3519 | if (msg->msg_flags & MSG_OOB) | |
3520 | goto out; | |
3521 | ||
3522 | err = -EMSGSIZE; | |
3523 | if ((unsigned)len > sk->sk_sndbuf - 32) | |
3524 | goto out; | |
3525 | ||
3526 | err = -ENOBUFS; | |
3527 | skb = alloc_skb(len, GFP_KERNEL); | |
3528 | if (skb == NULL) | |
3529 | goto out; | |
3530 | ||
3531 | err = -EFAULT; | |
3532 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3533 | goto out; | |
3534 | ||
3535 | hdr = pfkey_get_base_msg(skb, &err); | |
3536 | if (!hdr) | |
3537 | goto out; | |
3538 | ||
4a3e2f71 | 3539 | mutex_lock(&xfrm_cfg_mutex); |
1da177e4 | 3540 | err = pfkey_process(sk, skb, hdr); |
4a3e2f71 | 3541 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 LT |
3542 | |
3543 | out: | |
3544 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3545 | err = 0; | |
3546 | if (skb) | |
3547 | kfree_skb(skb); | |
3548 | ||
3549 | return err ? : len; | |
3550 | } | |
3551 | ||
3552 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3553 | struct socket *sock, struct msghdr *msg, size_t len, | |
3554 | int flags) | |
3555 | { | |
3556 | struct sock *sk = sock->sk; | |
83321d6b | 3557 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3558 | struct sk_buff *skb; |
3559 | int copied, err; | |
3560 | ||
3561 | err = -EINVAL; | |
3562 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3563 | goto out; | |
3564 | ||
3565 | msg->msg_namelen = 0; | |
3566 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | |
3567 | if (skb == NULL) | |
3568 | goto out; | |
3569 | ||
3570 | copied = skb->len; | |
3571 | if (copied > len) { | |
3572 | msg->msg_flags |= MSG_TRUNC; | |
3573 | copied = len; | |
3574 | } | |
3575 | ||
badff6d0 | 3576 | skb_reset_transport_header(skb); |
1da177e4 LT |
3577 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3578 | if (err) | |
3579 | goto out_free; | |
3580 | ||
3581 | sock_recv_timestamp(msg, sk, skb); | |
3582 | ||
3583 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3584 | ||
83321d6b TT |
3585 | if (pfk->dump.dump != NULL && |
3586 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3587 | pfkey_do_dump(pfk); | |
3588 | ||
1da177e4 LT |
3589 | out_free: |
3590 | skb_free_datagram(sk, skb); | |
3591 | out: | |
3592 | return err; | |
3593 | } | |
3594 | ||
90ddc4f0 | 3595 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3596 | .family = PF_KEY, |
3597 | .owner = THIS_MODULE, | |
3598 | /* Operations that make no sense on pfkey sockets. */ | |
3599 | .bind = sock_no_bind, | |
3600 | .connect = sock_no_connect, | |
3601 | .socketpair = sock_no_socketpair, | |
3602 | .accept = sock_no_accept, | |
3603 | .getname = sock_no_getname, | |
3604 | .ioctl = sock_no_ioctl, | |
3605 | .listen = sock_no_listen, | |
3606 | .shutdown = sock_no_shutdown, | |
3607 | .setsockopt = sock_no_setsockopt, | |
3608 | .getsockopt = sock_no_getsockopt, | |
3609 | .mmap = sock_no_mmap, | |
3610 | .sendpage = sock_no_sendpage, | |
3611 | ||
3612 | /* Now the operations that really occur. */ | |
3613 | .release = pfkey_release, | |
3614 | .poll = datagram_poll, | |
3615 | .sendmsg = pfkey_sendmsg, | |
3616 | .recvmsg = pfkey_recvmsg, | |
3617 | }; | |
3618 | ||
3619 | static struct net_proto_family pfkey_family_ops = { | |
3620 | .family = PF_KEY, | |
3621 | .create = pfkey_create, | |
3622 | .owner = THIS_MODULE, | |
3623 | }; | |
3624 | ||
3625 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3626 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3627 | { |
1da177e4 | 3628 | struct sock *s; |
1da177e4 | 3629 | |
bd2f7476 PE |
3630 | s = (struct sock *)v; |
3631 | if (v == SEQ_START_TOKEN) | |
3632 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3633 | else | |
3634 | seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n", | |
1da177e4 LT |
3635 | s, |
3636 | atomic_read(&s->sk_refcnt), | |
3637 | atomic_read(&s->sk_rmem_alloc), | |
3638 | atomic_read(&s->sk_wmem_alloc), | |
3639 | sock_i_uid(s), | |
3640 | sock_i_ino(s) | |
3641 | ); | |
bd2f7476 PE |
3642 | return 0; |
3643 | } | |
3644 | ||
3645 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
3646 | { | |
3647 | struct sock *s; | |
3648 | struct hlist_node *node; | |
3649 | loff_t pos = *ppos; | |
1da177e4 | 3650 | |
bd2f7476 PE |
3651 | read_lock(&pfkey_table_lock); |
3652 | if (pos == 0) | |
3653 | return SEQ_START_TOKEN; | |
8ff24541 | 3654 | |
bd2f7476 PE |
3655 | sk_for_each(s, node, &pfkey_table) |
3656 | if (pos-- == 1) | |
3657 | return s; | |
1da177e4 | 3658 | |
bd2f7476 PE |
3659 | return NULL; |
3660 | } | |
3661 | ||
3662 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3663 | { | |
3664 | ++*ppos; | |
3665 | return (v == SEQ_START_TOKEN) ? | |
3666 | sk_head(&pfkey_table) : | |
3667 | sk_next((struct sock *)v); | |
3668 | } | |
1da177e4 | 3669 | |
bd2f7476 PE |
3670 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
3671 | { | |
3672 | read_unlock(&pfkey_table_lock); | |
3673 | } | |
1da177e4 | 3674 | |
bd2f7476 PE |
3675 | static struct seq_operations pfkey_seq_ops = { |
3676 | .start = pfkey_seq_start, | |
3677 | .next = pfkey_seq_next, | |
3678 | .stop = pfkey_seq_stop, | |
3679 | .show = pfkey_seq_show, | |
3680 | }; | |
1da177e4 | 3681 | |
bd2f7476 PE |
3682 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3683 | { | |
3684 | return seq_open(file, &pfkey_seq_ops); | |
1da177e4 | 3685 | } |
61145aa1 | 3686 | |
bd2f7476 PE |
3687 | static struct file_operations pfkey_proc_ops = { |
3688 | .open = pfkey_seq_open, | |
3689 | .read = seq_read, | |
3690 | .llseek = seq_lseek, | |
3691 | .release = seq_release, | |
3692 | }; | |
3693 | ||
61145aa1 PE |
3694 | static int pfkey_init_proc(void) |
3695 | { | |
bd2f7476 PE |
3696 | struct proc_dir_entry *e; |
3697 | ||
d9595a7b | 3698 | e = proc_net_fops_create(&init_net, "pfkey", 0, &pfkey_proc_ops); |
bd2f7476 | 3699 | if (e == NULL) |
61145aa1 | 3700 | return -ENOMEM; |
bd2f7476 | 3701 | |
bd2f7476 | 3702 | return 0; |
61145aa1 PE |
3703 | } |
3704 | ||
3705 | static void pfkey_exit_proc(void) | |
3706 | { | |
d9595a7b | 3707 | proc_net_remove(&init_net, "pfkey"); |
61145aa1 PE |
3708 | } |
3709 | #else | |
3710 | static inline int pfkey_init_proc(void) | |
3711 | { | |
3712 | return 0; | |
3713 | } | |
3714 | ||
3715 | static inline void pfkey_exit_proc(void) | |
3716 | { | |
3717 | } | |
1da177e4 LT |
3718 | #endif |
3719 | ||
3720 | static struct xfrm_mgr pfkeyv2_mgr = | |
3721 | { | |
3722 | .id = "pfkeyv2", | |
3723 | .notify = pfkey_send_notify, | |
3724 | .acquire = pfkey_send_acquire, | |
3725 | .compile_policy = pfkey_compile_policy, | |
3726 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3727 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3728 | .migrate = pfkey_send_migrate, |
1da177e4 LT |
3729 | }; |
3730 | ||
3731 | static void __exit ipsec_pfkey_exit(void) | |
3732 | { | |
3733 | xfrm_unregister_km(&pfkeyv2_mgr); | |
61145aa1 | 3734 | pfkey_exit_proc(); |
1da177e4 LT |
3735 | sock_unregister(PF_KEY); |
3736 | proto_unregister(&key_proto); | |
3737 | } | |
3738 | ||
3739 | static int __init ipsec_pfkey_init(void) | |
3740 | { | |
3741 | int err = proto_register(&key_proto, 0); | |
3742 | ||
3743 | if (err != 0) | |
3744 | goto out; | |
3745 | ||
3746 | err = sock_register(&pfkey_family_ops); | |
3747 | if (err != 0) | |
3748 | goto out_unregister_key_proto; | |
61145aa1 PE |
3749 | err = pfkey_init_proc(); |
3750 | if (err != 0) | |
1da177e4 | 3751 | goto out_sock_unregister; |
1da177e4 LT |
3752 | err = xfrm_register_km(&pfkeyv2_mgr); |
3753 | if (err != 0) | |
3754 | goto out_remove_proc_entry; | |
3755 | out: | |
3756 | return err; | |
3757 | out_remove_proc_entry: | |
61145aa1 | 3758 | pfkey_exit_proc(); |
1da177e4 | 3759 | out_sock_unregister: |
1da177e4 LT |
3760 | sock_unregister(PF_KEY); |
3761 | out_unregister_key_proto: | |
3762 | proto_unregister(&key_proto); | |
3763 | goto out; | |
3764 | } | |
3765 | ||
3766 | module_init(ipsec_pfkey_init); | |
3767 | module_exit(ipsec_pfkey_exit); | |
3768 | MODULE_LICENSE("GPL"); | |
3769 | MODULE_ALIAS_NETPROTO(PF_KEY); |