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1 | /* |
2 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. |
3 | * |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU General Public License |
6 | * as published by the Free Software Foundation; either version |
7 | * 2 of the License, or (at your option) any later version. |
8 | * |
9 | * Authors: Maxim Giryaev <gem@asplinux.ru> |
10 | * David S. Miller <davem@redhat.com> |
11 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
12 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> |
13 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> |
14 | * Derek Atkins <derek@ihtfp.com> |
15 | */ |
16 | |
17 | #include <linux/capability.h> |
18 | #include <linux/module.h> |
19 | #include <linux/kernel.h> |
20 | #include <linux/socket.h> |
21 | #include <linux/pfkeyv2.h> |
22 | #include <linux/ipsec.h> |
23 | #include <linux/skbuff.h> |
24 | #include <linux/rtnetlink.h> |
25 | #include <linux/in.h> |
26 | #include <linux/in6.h> |
27 | #include <linux/proc_fs.h> |
28 | #include <linux/init.h> |
29 | #include <linux/slab.h> |
30 | #include <net/net_namespace.h> |
31 | #include <net/netns/generic.h> |
32 | #include <net/xfrm.h> |
33 | |
34 | #include <net/sock.h> |
35 | |
36 | #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) |
37 | #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) |
38 | |
39 | static int pfkey_net_id __read_mostly; |
40 | struct netns_pfkey { |
41 | /* List of all pfkey sockets. */ |
42 | struct hlist_head table; |
43 | atomic_t socks_nr; |
44 | }; |
45 | static DEFINE_MUTEX(pfkey_mutex); |
46 | |
47 | #define DUMMY_MARK 0 |
48 | static struct xfrm_mark dummy_mark = {0, 0}; |
49 | struct pfkey_sock { |
50 | /* struct sock must be the first member of struct pfkey_sock */ |
51 | struct sock sk; |
52 | int registered; |
53 | int promisc; |
54 | |
55 | struct { |
56 | uint8_t msg_version; |
57 | uint32_t msg_pid; |
58 | int (*dump)(struct pfkey_sock *sk); |
59 | void (*done)(struct pfkey_sock *sk); |
60 | union { |
61 | struct xfrm_policy_walk policy; |
62 | struct xfrm_state_walk state; |
63 | } u; |
64 | struct sk_buff *skb; |
65 | } dump; |
66 | }; |
67 | |
68 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) |
69 | { |
70 | return (struct pfkey_sock *)sk; |
71 | } |
72 | |
73 | static int pfkey_can_dump(struct sock *sk) |
74 | { |
75 | if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) |
76 | return 1; |
77 | return 0; |
78 | } |
79 | |
80 | static void pfkey_terminate_dump(struct pfkey_sock *pfk) |
81 | { |
82 | if (pfk->dump.dump) { |
83 | if (pfk->dump.skb) { |
84 | kfree_skb(pfk->dump.skb); |
85 | pfk->dump.skb = NULL; |
86 | } |
87 | pfk->dump.done(pfk); |
88 | pfk->dump.dump = NULL; |
89 | pfk->dump.done = NULL; |
90 | } |
91 | } |
92 | |
93 | static void pfkey_sock_destruct(struct sock *sk) |
94 | { |
95 | struct net *net = sock_net(sk); |
96 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
97 | |
98 | pfkey_terminate_dump(pfkey_sk(sk)); |
99 | skb_queue_purge(&sk->sk_receive_queue); |
100 | |
101 | if (!sock_flag(sk, SOCK_DEAD)) { |
102 | printk("Attempt to release alive pfkey socket: %p\n", sk); |
103 | return; |
104 | } |
105 | |
106 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
107 | WARN_ON(atomic_read(&sk->sk_wmem_alloc)); |
108 | |
109 | atomic_dec(&net_pfkey->socks_nr); |
110 | } |
111 | |
112 | static const struct proto_ops pfkey_ops; |
113 | |
114 | static void pfkey_insert(struct sock *sk) |
115 | { |
116 | struct net *net = sock_net(sk); |
117 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
118 | |
119 | mutex_lock(&pfkey_mutex); |
120 | sk_add_node_rcu(sk, &net_pfkey->table); |
121 | mutex_unlock(&pfkey_mutex); |
122 | } |
123 | |
124 | static void pfkey_remove(struct sock *sk) |
125 | { |
126 | mutex_lock(&pfkey_mutex); |
127 | sk_del_node_init_rcu(sk); |
128 | mutex_unlock(&pfkey_mutex); |
129 | } |
130 | |
131 | static struct proto key_proto = { |
132 | .name = "KEY", |
133 | .owner = THIS_MODULE, |
134 | .obj_size = sizeof(struct pfkey_sock), |
135 | }; |
136 | |
137 | static int pfkey_create(struct net *net, struct socket *sock, int protocol, |
138 | int kern) |
139 | { |
140 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
141 | struct sock *sk; |
142 | int err; |
143 | |
144 | if (!capable(CAP_NET_ADMIN)) |
145 | return -EPERM; |
146 | if (sock->type != SOCK_RAW) |
147 | return -ESOCKTNOSUPPORT; |
148 | if (protocol != PF_KEY_V2) |
149 | return -EPROTONOSUPPORT; |
150 | |
151 | err = -ENOMEM; |
152 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto); |
153 | if (sk == NULL) |
154 | goto out; |
155 | |
156 | sock->ops = &pfkey_ops; |
157 | sock_init_data(sock, sk); |
158 | |
159 | sk->sk_family = PF_KEY; |
160 | sk->sk_destruct = pfkey_sock_destruct; |
161 | |
162 | atomic_inc(&net_pfkey->socks_nr); |
163 | |
164 | pfkey_insert(sk); |
165 | |
166 | return 0; |
167 | out: |
168 | return err; |
169 | } |
170 | |
171 | static int pfkey_release(struct socket *sock) |
172 | { |
173 | struct sock *sk = sock->sk; |
174 | |
175 | if (!sk) |
176 | return 0; |
177 | |
178 | pfkey_remove(sk); |
179 | |
180 | sock_orphan(sk); |
181 | sock->sk = NULL; |
182 | skb_queue_purge(&sk->sk_write_queue); |
183 | |
184 | synchronize_rcu(); |
185 | sock_put(sk); |
186 | |
187 | return 0; |
188 | } |
189 | |
190 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, |
191 | gfp_t allocation, struct sock *sk) |
192 | { |
193 | int err = -ENOBUFS; |
194 | |
195 | sock_hold(sk); |
196 | if (*skb2 == NULL) { |
197 | if (atomic_read(&skb->users) != 1) { |
198 | *skb2 = skb_clone(skb, allocation); |
199 | } else { |
200 | *skb2 = skb; |
201 | atomic_inc(&skb->users); |
202 | } |
203 | } |
204 | if (*skb2 != NULL) { |
205 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { |
206 | skb_orphan(*skb2); |
207 | skb_set_owner_r(*skb2, sk); |
208 | skb_queue_tail(&sk->sk_receive_queue, *skb2); |
209 | sk->sk_data_ready(sk, (*skb2)->len); |
210 | *skb2 = NULL; |
211 | err = 0; |
212 | } |
213 | } |
214 | sock_put(sk); |
215 | return err; |
216 | } |
217 | |
218 | /* Send SKB to all pfkey sockets matching selected criteria. */ |
219 | #define BROADCAST_ALL 0 |
220 | #define BROADCAST_ONE 1 |
221 | #define BROADCAST_REGISTERED 2 |
222 | #define BROADCAST_PROMISC_ONLY 4 |
223 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
224 | int broadcast_flags, struct sock *one_sk, |
225 | struct net *net) |
226 | { |
227 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
228 | struct sock *sk; |
229 | struct hlist_node *node; |
230 | struct sk_buff *skb2 = NULL; |
231 | int err = -ESRCH; |
232 | |
233 | /* XXX Do we need something like netlink_overrun? I think |
234 | * XXX PF_KEY socket apps will not mind current behavior. |
235 | */ |
236 | if (!skb) |
237 | return -ENOMEM; |
238 | |
239 | rcu_read_lock(); |
240 | sk_for_each_rcu(sk, node, &net_pfkey->table) { |
241 | struct pfkey_sock *pfk = pfkey_sk(sk); |
242 | int err2; |
243 | |
244 | /* Yes, it means that if you are meant to receive this |
245 | * pfkey message you receive it twice as promiscuous |
246 | * socket. |
247 | */ |
248 | if (pfk->promisc) |
249 | pfkey_broadcast_one(skb, &skb2, allocation, sk); |
250 | |
251 | /* the exact target will be processed later */ |
252 | if (sk == one_sk) |
253 | continue; |
254 | if (broadcast_flags != BROADCAST_ALL) { |
255 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) |
256 | continue; |
257 | if ((broadcast_flags & BROADCAST_REGISTERED) && |
258 | !pfk->registered) |
259 | continue; |
260 | if (broadcast_flags & BROADCAST_ONE) |
261 | continue; |
262 | } |
263 | |
264 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); |
265 | |
266 | /* Error is cleare after succecful sending to at least one |
267 | * registered KM */ |
268 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) |
269 | err = err2; |
270 | } |
271 | rcu_read_unlock(); |
272 | |
273 | if (one_sk != NULL) |
274 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); |
275 | |
276 | kfree_skb(skb2); |
277 | kfree_skb(skb); |
278 | return err; |
279 | } |
280 | |
281 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
282 | { |
283 | struct sadb_msg *hdr; |
284 | int rc; |
285 | |
286 | rc = pfk->dump.dump(pfk); |
287 | if (rc == -ENOBUFS) |
288 | return 0; |
289 | |
290 | if (pfk->dump.skb) { |
291 | if (!pfkey_can_dump(&pfk->sk)) |
292 | return 0; |
293 | |
294 | hdr = (struct sadb_msg *) pfk->dump.skb->data; |
295 | hdr->sadb_msg_seq = 0; |
296 | hdr->sadb_msg_errno = rc; |
297 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
298 | &pfk->sk, sock_net(&pfk->sk)); |
299 | pfk->dump.skb = NULL; |
300 | } |
301 | |
302 | pfkey_terminate_dump(pfk); |
303 | return rc; |
304 | } |
305 | |
306 | static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig) |
307 | { |
308 | *new = *orig; |
309 | } |
310 | |
311 | static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk) |
312 | { |
313 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); |
314 | struct sadb_msg *hdr; |
315 | |
316 | if (!skb) |
317 | return -ENOBUFS; |
318 | |
319 | /* Woe be to the platform trying to support PFKEY yet |
320 | * having normal errnos outside the 1-255 range, inclusive. |
321 | */ |
322 | err = -err; |
323 | if (err == ERESTARTSYS || |
324 | err == ERESTARTNOHAND || |
325 | err == ERESTARTNOINTR) |
326 | err = EINTR; |
327 | if (err >= 512) |
328 | err = EINVAL; |
329 | BUG_ON(err <= 0 || err >= 256); |
330 | |
331 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
332 | pfkey_hdr_dup(hdr, orig); |
333 | hdr->sadb_msg_errno = (uint8_t) err; |
334 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / |
335 | sizeof(uint64_t)); |
336 | |
337 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
338 | |
339 | return 0; |
340 | } |
341 | |
342 | static u8 sadb_ext_min_len[] = { |
343 | [SADB_EXT_RESERVED] = (u8) 0, |
344 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), |
345 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), |
346 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), |
347 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), |
348 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), |
349 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), |
350 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), |
351 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), |
352 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), |
353 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), |
354 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), |
355 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), |
356 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), |
357 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), |
358 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), |
359 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), |
360 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), |
361 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), |
362 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), |
363 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), |
364 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), |
365 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), |
366 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), |
367 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
368 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
369 | }; |
370 | |
371 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ |
372 | static int verify_address_len(void *p) |
373 | { |
374 | struct sadb_address *sp = p; |
375 | struct sockaddr *addr = (struct sockaddr *)(sp + 1); |
376 | struct sockaddr_in *sin; |
377 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
378 | struct sockaddr_in6 *sin6; |
379 | #endif |
380 | int len; |
381 | |
382 | switch (addr->sa_family) { |
383 | case AF_INET: |
384 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
385 | if (sp->sadb_address_len != len || |
386 | sp->sadb_address_prefixlen > 32) |
387 | return -EINVAL; |
388 | break; |
389 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
390 | case AF_INET6: |
391 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
392 | if (sp->sadb_address_len != len || |
393 | sp->sadb_address_prefixlen > 128) |
394 | return -EINVAL; |
395 | break; |
396 | #endif |
397 | default: |
398 | /* It is user using kernel to keep track of security |
399 | * associations for another protocol, such as |
400 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify |
401 | * lengths. |
402 | * |
403 | * XXX Actually, association/policy database is not yet |
404 | * XXX able to cope with arbitrary sockaddr families. |
405 | * XXX When it can, remove this -EINVAL. -DaveM |
406 | */ |
407 | return -EINVAL; |
408 | break; |
409 | } |
410 | |
411 | return 0; |
412 | } |
413 | |
414 | static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx) |
415 | { |
416 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
417 | sec_ctx->sadb_x_ctx_len, |
418 | sizeof(uint64_t)); |
419 | } |
420 | |
421 | static inline int verify_sec_ctx_len(void *p) |
422 | { |
423 | struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p; |
424 | int len = sec_ctx->sadb_x_ctx_len; |
425 | |
426 | if (len > PAGE_SIZE) |
427 | return -EINVAL; |
428 | |
429 | len = pfkey_sec_ctx_len(sec_ctx); |
430 | |
431 | if (sec_ctx->sadb_x_sec_len != len) |
432 | return -EINVAL; |
433 | |
434 | return 0; |
435 | } |
436 | |
437 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx) |
438 | { |
439 | struct xfrm_user_sec_ctx *uctx = NULL; |
440 | int ctx_size = sec_ctx->sadb_x_ctx_len; |
441 | |
442 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); |
443 | |
444 | if (!uctx) |
445 | return NULL; |
446 | |
447 | uctx->len = pfkey_sec_ctx_len(sec_ctx); |
448 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; |
449 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; |
450 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; |
451 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; |
452 | memcpy(uctx + 1, sec_ctx + 1, |
453 | uctx->ctx_len); |
454 | |
455 | return uctx; |
456 | } |
457 | |
458 | static int present_and_same_family(struct sadb_address *src, |
459 | struct sadb_address *dst) |
460 | { |
461 | struct sockaddr *s_addr, *d_addr; |
462 | |
463 | if (!src || !dst) |
464 | return 0; |
465 | |
466 | s_addr = (struct sockaddr *)(src + 1); |
467 | d_addr = (struct sockaddr *)(dst + 1); |
468 | if (s_addr->sa_family != d_addr->sa_family) |
469 | return 0; |
470 | if (s_addr->sa_family != AF_INET |
471 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
472 | && s_addr->sa_family != AF_INET6 |
473 | #endif |
474 | ) |
475 | return 0; |
476 | |
477 | return 1; |
478 | } |
479 | |
480 | static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
481 | { |
482 | char *p = (char *) hdr; |
483 | int len = skb->len; |
484 | |
485 | len -= sizeof(*hdr); |
486 | p += sizeof(*hdr); |
487 | while (len > 0) { |
488 | struct sadb_ext *ehdr = (struct sadb_ext *) p; |
489 | uint16_t ext_type; |
490 | int ext_len; |
491 | |
492 | ext_len = ehdr->sadb_ext_len; |
493 | ext_len *= sizeof(uint64_t); |
494 | ext_type = ehdr->sadb_ext_type; |
495 | if (ext_len < sizeof(uint64_t) || |
496 | ext_len > len || |
497 | ext_type == SADB_EXT_RESERVED) |
498 | return -EINVAL; |
499 | |
500 | if (ext_type <= SADB_EXT_MAX) { |
501 | int min = (int) sadb_ext_min_len[ext_type]; |
502 | if (ext_len < min) |
503 | return -EINVAL; |
504 | if (ext_hdrs[ext_type-1] != NULL) |
505 | return -EINVAL; |
506 | if (ext_type == SADB_EXT_ADDRESS_SRC || |
507 | ext_type == SADB_EXT_ADDRESS_DST || |
508 | ext_type == SADB_EXT_ADDRESS_PROXY || |
509 | ext_type == SADB_X_EXT_NAT_T_OA) { |
510 | if (verify_address_len(p)) |
511 | return -EINVAL; |
512 | } |
513 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
514 | if (verify_sec_ctx_len(p)) |
515 | return -EINVAL; |
516 | } |
517 | ext_hdrs[ext_type-1] = p; |
518 | } |
519 | p += ext_len; |
520 | len -= ext_len; |
521 | } |
522 | |
523 | return 0; |
524 | } |
525 | |
526 | static uint16_t |
527 | pfkey_satype2proto(uint8_t satype) |
528 | { |
529 | switch (satype) { |
530 | case SADB_SATYPE_UNSPEC: |
531 | return IPSEC_PROTO_ANY; |
532 | case SADB_SATYPE_AH: |
533 | return IPPROTO_AH; |
534 | case SADB_SATYPE_ESP: |
535 | return IPPROTO_ESP; |
536 | case SADB_X_SATYPE_IPCOMP: |
537 | return IPPROTO_COMP; |
538 | break; |
539 | default: |
540 | return 0; |
541 | } |
542 | /* NOTREACHED */ |
543 | } |
544 | |
545 | static uint8_t |
546 | pfkey_proto2satype(uint16_t proto) |
547 | { |
548 | switch (proto) { |
549 | case IPPROTO_AH: |
550 | return SADB_SATYPE_AH; |
551 | case IPPROTO_ESP: |
552 | return SADB_SATYPE_ESP; |
553 | case IPPROTO_COMP: |
554 | return SADB_X_SATYPE_IPCOMP; |
555 | break; |
556 | default: |
557 | return 0; |
558 | } |
559 | /* NOTREACHED */ |
560 | } |
561 | |
562 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to |
563 | * say specifically 'just raw sockets' as we encode them as 255. |
564 | */ |
565 | |
566 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) |
567 | { |
568 | return (proto == IPSEC_PROTO_ANY ? 0 : proto); |
569 | } |
570 | |
571 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) |
572 | { |
573 | return (proto ? proto : IPSEC_PROTO_ANY); |
574 | } |
575 | |
576 | static inline int pfkey_sockaddr_len(sa_family_t family) |
577 | { |
578 | switch (family) { |
579 | case AF_INET: |
580 | return sizeof(struct sockaddr_in); |
581 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
582 | case AF_INET6: |
583 | return sizeof(struct sockaddr_in6); |
584 | #endif |
585 | } |
586 | return 0; |
587 | } |
588 | |
589 | static |
590 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) |
591 | { |
592 | switch (sa->sa_family) { |
593 | case AF_INET: |
594 | xaddr->a4 = |
595 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
596 | return AF_INET; |
597 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
598 | case AF_INET6: |
599 | memcpy(xaddr->a6, |
600 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
601 | sizeof(struct in6_addr)); |
602 | return AF_INET6; |
603 | #endif |
604 | } |
605 | return 0; |
606 | } |
607 | |
608 | static |
609 | int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr) |
610 | { |
611 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), |
612 | xaddr); |
613 | } |
614 | |
615 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, struct sadb_msg *hdr, void **ext_hdrs) |
616 | { |
617 | struct sadb_sa *sa; |
618 | struct sadb_address *addr; |
619 | uint16_t proto; |
620 | unsigned short family; |
621 | xfrm_address_t *xaddr; |
622 | |
623 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; |
624 | if (sa == NULL) |
625 | return NULL; |
626 | |
627 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); |
628 | if (proto == 0) |
629 | return NULL; |
630 | |
631 | /* sadb_address_len should be checked by caller */ |
632 | addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
633 | if (addr == NULL) |
634 | return NULL; |
635 | |
636 | family = ((struct sockaddr *)(addr + 1))->sa_family; |
637 | switch (family) { |
638 | case AF_INET: |
639 | xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr; |
640 | break; |
641 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
642 | case AF_INET6: |
643 | xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr; |
644 | break; |
645 | #endif |
646 | default: |
647 | xaddr = NULL; |
648 | } |
649 | |
650 | if (!xaddr) |
651 | return NULL; |
652 | |
653 | return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family); |
654 | } |
655 | |
656 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) |
657 | |
658 | static int |
659 | pfkey_sockaddr_size(sa_family_t family) |
660 | { |
661 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
662 | } |
663 | |
664 | static inline int pfkey_mode_from_xfrm(int mode) |
665 | { |
666 | switch(mode) { |
667 | case XFRM_MODE_TRANSPORT: |
668 | return IPSEC_MODE_TRANSPORT; |
669 | case XFRM_MODE_TUNNEL: |
670 | return IPSEC_MODE_TUNNEL; |
671 | case XFRM_MODE_BEET: |
672 | return IPSEC_MODE_BEET; |
673 | default: |
674 | return -1; |
675 | } |
676 | } |
677 | |
678 | static inline int pfkey_mode_to_xfrm(int mode) |
679 | { |
680 | switch(mode) { |
681 | case IPSEC_MODE_ANY: /*XXX*/ |
682 | case IPSEC_MODE_TRANSPORT: |
683 | return XFRM_MODE_TRANSPORT; |
684 | case IPSEC_MODE_TUNNEL: |
685 | return XFRM_MODE_TUNNEL; |
686 | case IPSEC_MODE_BEET: |
687 | return XFRM_MODE_BEET; |
688 | default: |
689 | return -1; |
690 | } |
691 | } |
692 | |
693 | static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port, |
694 | struct sockaddr *sa, |
695 | unsigned short family) |
696 | { |
697 | switch (family) { |
698 | case AF_INET: |
699 | { |
700 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; |
701 | sin->sin_family = AF_INET; |
702 | sin->sin_port = port; |
703 | sin->sin_addr.s_addr = xaddr->a4; |
704 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
705 | return 32; |
706 | } |
707 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
708 | case AF_INET6: |
709 | { |
710 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; |
711 | sin6->sin6_family = AF_INET6; |
712 | sin6->sin6_port = port; |
713 | sin6->sin6_flowinfo = 0; |
714 | ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6); |
715 | sin6->sin6_scope_id = 0; |
716 | return 128; |
717 | } |
718 | #endif |
719 | } |
720 | return 0; |
721 | } |
722 | |
723 | static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x, |
724 | int add_keys, int hsc) |
725 | { |
726 | struct sk_buff *skb; |
727 | struct sadb_msg *hdr; |
728 | struct sadb_sa *sa; |
729 | struct sadb_lifetime *lifetime; |
730 | struct sadb_address *addr; |
731 | struct sadb_key *key; |
732 | struct sadb_x_sa2 *sa2; |
733 | struct sadb_x_sec_ctx *sec_ctx; |
734 | struct xfrm_sec_ctx *xfrm_ctx; |
735 | int ctx_size = 0; |
736 | int size; |
737 | int auth_key_size = 0; |
738 | int encrypt_key_size = 0; |
739 | int sockaddr_size; |
740 | struct xfrm_encap_tmpl *natt = NULL; |
741 | int mode; |
742 | |
743 | /* address family check */ |
744 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
745 | if (!sockaddr_size) |
746 | return ERR_PTR(-EINVAL); |
747 | |
748 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) |
749 | key(AE), (identity(SD),) (sensitivity)> */ |
750 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
751 | sizeof(struct sadb_lifetime) + |
752 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + |
753 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + |
754 | sizeof(struct sadb_address)*2 + |
755 | sockaddr_size*2 + |
756 | sizeof(struct sadb_x_sa2); |
757 | |
758 | if ((xfrm_ctx = x->security)) { |
759 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); |
760 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; |
761 | } |
762 | |
763 | /* identity & sensitivity */ |
764 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family)) |
765 | size += sizeof(struct sadb_address) + sockaddr_size; |
766 | |
767 | if (add_keys) { |
768 | if (x->aalg && x->aalg->alg_key_len) { |
769 | auth_key_size = |
770 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); |
771 | size += sizeof(struct sadb_key) + auth_key_size; |
772 | } |
773 | if (x->ealg && x->ealg->alg_key_len) { |
774 | encrypt_key_size = |
775 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); |
776 | size += sizeof(struct sadb_key) + encrypt_key_size; |
777 | } |
778 | } |
779 | if (x->encap) |
780 | natt = x->encap; |
781 | |
782 | if (natt && natt->encap_type) { |
783 | size += sizeof(struct sadb_x_nat_t_type); |
784 | size += sizeof(struct sadb_x_nat_t_port); |
785 | size += sizeof(struct sadb_x_nat_t_port); |
786 | } |
787 | |
788 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
789 | if (skb == NULL) |
790 | return ERR_PTR(-ENOBUFS); |
791 | |
792 | /* call should fill header later */ |
793 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
794 | memset(hdr, 0, size); /* XXX do we need this ? */ |
795 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
796 | |
797 | /* sa */ |
798 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); |
799 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
800 | sa->sadb_sa_exttype = SADB_EXT_SA; |
801 | sa->sadb_sa_spi = x->id.spi; |
802 | sa->sadb_sa_replay = x->props.replay_window; |
803 | switch (x->km.state) { |
804 | case XFRM_STATE_VALID: |
805 | sa->sadb_sa_state = x->km.dying ? |
806 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; |
807 | break; |
808 | case XFRM_STATE_ACQ: |
809 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
810 | break; |
811 | default: |
812 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
813 | break; |
814 | } |
815 | sa->sadb_sa_auth = 0; |
816 | if (x->aalg) { |
817 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); |
818 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; |
819 | } |
820 | sa->sadb_sa_encrypt = 0; |
821 | BUG_ON(x->ealg && x->calg); |
822 | if (x->ealg) { |
823 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); |
824 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; |
825 | } |
826 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ |
827 | if (x->calg) { |
828 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); |
829 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; |
830 | } |
831 | |
832 | sa->sadb_sa_flags = 0; |
833 | if (x->props.flags & XFRM_STATE_NOECN) |
834 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; |
835 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) |
836 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; |
837 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
838 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; |
839 | |
840 | /* hard time */ |
841 | if (hsc & 2) { |
842 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
843 | sizeof(struct sadb_lifetime)); |
844 | lifetime->sadb_lifetime_len = |
845 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); |
846 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; |
847 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); |
848 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); |
849 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; |
850 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; |
851 | } |
852 | /* soft time */ |
853 | if (hsc & 1) { |
854 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
855 | sizeof(struct sadb_lifetime)); |
856 | lifetime->sadb_lifetime_len = |
857 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); |
858 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; |
859 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); |
860 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); |
861 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; |
862 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; |
863 | } |
864 | /* current time */ |
865 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
866 | sizeof(struct sadb_lifetime)); |
867 | lifetime->sadb_lifetime_len = |
868 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); |
869 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; |
870 | lifetime->sadb_lifetime_allocations = x->curlft.packets; |
871 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; |
872 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; |
873 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; |
874 | /* src address */ |
875 | addr = (struct sadb_address*) skb_put(skb, |
876 | sizeof(struct sadb_address)+sockaddr_size); |
877 | addr->sadb_address_len = |
878 | (sizeof(struct sadb_address)+sockaddr_size)/ |
879 | sizeof(uint64_t); |
880 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; |
881 | /* "if the ports are non-zero, then the sadb_address_proto field, |
882 | normally zero, MUST be filled in with the transport |
883 | protocol's number." - RFC2367 */ |
884 | addr->sadb_address_proto = 0; |
885 | addr->sadb_address_reserved = 0; |
886 | |
887 | addr->sadb_address_prefixlen = |
888 | pfkey_sockaddr_fill(&x->props.saddr, 0, |
889 | (struct sockaddr *) (addr + 1), |
890 | x->props.family); |
891 | if (!addr->sadb_address_prefixlen) |
892 | BUG(); |
893 | |
894 | /* dst address */ |
895 | addr = (struct sadb_address*) skb_put(skb, |
896 | sizeof(struct sadb_address)+sockaddr_size); |
897 | addr->sadb_address_len = |
898 | (sizeof(struct sadb_address)+sockaddr_size)/ |
899 | sizeof(uint64_t); |
900 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; |
901 | addr->sadb_address_proto = 0; |
902 | addr->sadb_address_reserved = 0; |
903 | |
904 | addr->sadb_address_prefixlen = |
905 | pfkey_sockaddr_fill(&x->id.daddr, 0, |
906 | (struct sockaddr *) (addr + 1), |
907 | x->props.family); |
908 | if (!addr->sadb_address_prefixlen) |
909 | BUG(); |
910 | |
911 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, |
912 | x->props.family)) { |
913 | addr = (struct sadb_address*) skb_put(skb, |
914 | sizeof(struct sadb_address)+sockaddr_size); |
915 | addr->sadb_address_len = |
916 | (sizeof(struct sadb_address)+sockaddr_size)/ |
917 | sizeof(uint64_t); |
918 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; |
919 | addr->sadb_address_proto = |
920 | pfkey_proto_from_xfrm(x->sel.proto); |
921 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; |
922 | addr->sadb_address_reserved = 0; |
923 | |
924 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
925 | (struct sockaddr *) (addr + 1), |
926 | x->props.family); |
927 | } |
928 | |
929 | /* auth key */ |
930 | if (add_keys && auth_key_size) { |
931 | key = (struct sadb_key *) skb_put(skb, |
932 | sizeof(struct sadb_key)+auth_key_size); |
933 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / |
934 | sizeof(uint64_t); |
935 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; |
936 | key->sadb_key_bits = x->aalg->alg_key_len; |
937 | key->sadb_key_reserved = 0; |
938 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); |
939 | } |
940 | /* encrypt key */ |
941 | if (add_keys && encrypt_key_size) { |
942 | key = (struct sadb_key *) skb_put(skb, |
943 | sizeof(struct sadb_key)+encrypt_key_size); |
944 | key->sadb_key_len = (sizeof(struct sadb_key) + |
945 | encrypt_key_size) / sizeof(uint64_t); |
946 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; |
947 | key->sadb_key_bits = x->ealg->alg_key_len; |
948 | key->sadb_key_reserved = 0; |
949 | memcpy(key + 1, x->ealg->alg_key, |
950 | (x->ealg->alg_key_len+7)/8); |
951 | } |
952 | |
953 | /* sa */ |
954 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); |
955 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); |
956 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; |
957 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
958 | kfree_skb(skb); |
959 | return ERR_PTR(-EINVAL); |
960 | } |
961 | sa2->sadb_x_sa2_mode = mode; |
962 | sa2->sadb_x_sa2_reserved1 = 0; |
963 | sa2->sadb_x_sa2_reserved2 = 0; |
964 | sa2->sadb_x_sa2_sequence = 0; |
965 | sa2->sadb_x_sa2_reqid = x->props.reqid; |
966 | |
967 | if (natt && natt->encap_type) { |
968 | struct sadb_x_nat_t_type *n_type; |
969 | struct sadb_x_nat_t_port *n_port; |
970 | |
971 | /* type */ |
972 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); |
973 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); |
974 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; |
975 | n_type->sadb_x_nat_t_type_type = natt->encap_type; |
976 | n_type->sadb_x_nat_t_type_reserved[0] = 0; |
977 | n_type->sadb_x_nat_t_type_reserved[1] = 0; |
978 | n_type->sadb_x_nat_t_type_reserved[2] = 0; |
979 | |
980 | /* source port */ |
981 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); |
982 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
983 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; |
984 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; |
985 | n_port->sadb_x_nat_t_port_reserved = 0; |
986 | |
987 | /* dest port */ |
988 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); |
989 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
990 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; |
991 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; |
992 | n_port->sadb_x_nat_t_port_reserved = 0; |
993 | } |
994 | |
995 | /* security context */ |
996 | if (xfrm_ctx) { |
997 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, |
998 | sizeof(struct sadb_x_sec_ctx) + ctx_size); |
999 | sec_ctx->sadb_x_sec_len = |
1000 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); |
1001 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; |
1002 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; |
1003 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; |
1004 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; |
1005 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, |
1006 | xfrm_ctx->ctx_len); |
1007 | } |
1008 | |
1009 | return skb; |
1010 | } |
1011 | |
1012 | |
1013 | static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x) |
1014 | { |
1015 | struct sk_buff *skb; |
1016 | |
1017 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
1018 | |
1019 | return skb; |
1020 | } |
1021 | |
1022 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x, |
1023 | int hsc) |
1024 | { |
1025 | return __pfkey_xfrm_state2msg(x, 0, hsc); |
1026 | } |
1027 | |
1028 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
1029 | struct sadb_msg *hdr, |
1030 | void **ext_hdrs) |
1031 | { |
1032 | struct xfrm_state *x; |
1033 | struct sadb_lifetime *lifetime; |
1034 | struct sadb_sa *sa; |
1035 | struct sadb_key *key; |
1036 | struct sadb_x_sec_ctx *sec_ctx; |
1037 | uint16_t proto; |
1038 | int err; |
1039 | |
1040 | |
1041 | sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; |
1042 | if (!sa || |
1043 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1044 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) |
1045 | return ERR_PTR(-EINVAL); |
1046 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && |
1047 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) |
1048 | return ERR_PTR(-EINVAL); |
1049 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && |
1050 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) |
1051 | return ERR_PTR(-EINVAL); |
1052 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != |
1053 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) |
1054 | return ERR_PTR(-EINVAL); |
1055 | |
1056 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); |
1057 | if (proto == 0) |
1058 | return ERR_PTR(-EINVAL); |
1059 | |
1060 | /* default error is no buffer space */ |
1061 | err = -ENOBUFS; |
1062 | |
1063 | /* RFC2367: |
1064 | |
1065 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. |
1066 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not |
1067 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. |
1068 | Therefore, the sadb_sa_state field of all submitted SAs MUST be |
1069 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is |
1070 | not true. |
1071 | |
1072 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1073 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1074 | */ |
1075 | if (sa->sadb_sa_auth > SADB_AALG_MAX || |
1076 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && |
1077 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || |
1078 | sa->sadb_sa_encrypt > SADB_EALG_MAX) |
1079 | return ERR_PTR(-EINVAL); |
1080 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1081 | if (key != NULL && |
1082 | sa->sadb_sa_auth != SADB_X_AALG_NULL && |
1083 | ((key->sadb_key_bits+7) / 8 == 0 || |
1084 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) |
1085 | return ERR_PTR(-EINVAL); |
1086 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; |
1087 | if (key != NULL && |
1088 | sa->sadb_sa_encrypt != SADB_EALG_NULL && |
1089 | ((key->sadb_key_bits+7) / 8 == 0 || |
1090 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) |
1091 | return ERR_PTR(-EINVAL); |
1092 | |
1093 | x = xfrm_state_alloc(net); |
1094 | if (x == NULL) |
1095 | return ERR_PTR(-ENOBUFS); |
1096 | |
1097 | x->id.proto = proto; |
1098 | x->id.spi = sa->sadb_sa_spi; |
1099 | x->props.replay_window = sa->sadb_sa_replay; |
1100 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) |
1101 | x->props.flags |= XFRM_STATE_NOECN; |
1102 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) |
1103 | x->props.flags |= XFRM_STATE_DECAP_DSCP; |
1104 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1105 | x->props.flags |= XFRM_STATE_NOPMTUDISC; |
1106 | |
1107 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; |
1108 | if (lifetime != NULL) { |
1109 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); |
1110 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); |
1111 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; |
1112 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; |
1113 | } |
1114 | lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; |
1115 | if (lifetime != NULL) { |
1116 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); |
1117 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); |
1118 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; |
1119 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; |
1120 | } |
1121 | |
1122 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
1123 | if (sec_ctx != NULL) { |
1124 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); |
1125 | |
1126 | if (!uctx) |
1127 | goto out; |
1128 | |
1129 | err = security_xfrm_state_alloc(x, uctx); |
1130 | kfree(uctx); |
1131 | |
1132 | if (err) |
1133 | goto out; |
1134 | } |
1135 | |
1136 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1137 | if (sa->sadb_sa_auth) { |
1138 | int keysize = 0; |
1139 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); |
1140 | if (!a) { |
1141 | err = -ENOSYS; |
1142 | goto out; |
1143 | } |
1144 | if (key) |
1145 | keysize = (key->sadb_key_bits + 7) / 8; |
1146 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); |
1147 | if (!x->aalg) |
1148 | goto out; |
1149 | strcpy(x->aalg->alg_name, a->name); |
1150 | x->aalg->alg_key_len = 0; |
1151 | if (key) { |
1152 | x->aalg->alg_key_len = key->sadb_key_bits; |
1153 | memcpy(x->aalg->alg_key, key+1, keysize); |
1154 | } |
1155 | x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1156 | x->props.aalgo = sa->sadb_sa_auth; |
1157 | /* x->algo.flags = sa->sadb_sa_flags; */ |
1158 | } |
1159 | if (sa->sadb_sa_encrypt) { |
1160 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { |
1161 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); |
1162 | if (!a) { |
1163 | err = -ENOSYS; |
1164 | goto out; |
1165 | } |
1166 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); |
1167 | if (!x->calg) |
1168 | goto out; |
1169 | strcpy(x->calg->alg_name, a->name); |
1170 | x->props.calgo = sa->sadb_sa_encrypt; |
1171 | } else { |
1172 | int keysize = 0; |
1173 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); |
1174 | if (!a) { |
1175 | err = -ENOSYS; |
1176 | goto out; |
1177 | } |
1178 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; |
1179 | if (key) |
1180 | keysize = (key->sadb_key_bits + 7) / 8; |
1181 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); |
1182 | if (!x->ealg) |
1183 | goto out; |
1184 | strcpy(x->ealg->alg_name, a->name); |
1185 | x->ealg->alg_key_len = 0; |
1186 | if (key) { |
1187 | x->ealg->alg_key_len = key->sadb_key_bits; |
1188 | memcpy(x->ealg->alg_key, key+1, keysize); |
1189 | } |
1190 | x->props.ealgo = sa->sadb_sa_encrypt; |
1191 | } |
1192 | } |
1193 | /* x->algo.flags = sa->sadb_sa_flags; */ |
1194 | |
1195 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1196 | &x->props.saddr); |
1197 | if (!x->props.family) { |
1198 | err = -EAFNOSUPPORT; |
1199 | goto out; |
1200 | } |
1201 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1202 | &x->id.daddr); |
1203 | |
1204 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { |
1205 | struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1]; |
1206 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1207 | if (mode < 0) { |
1208 | err = -EINVAL; |
1209 | goto out; |
1210 | } |
1211 | x->props.mode = mode; |
1212 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1213 | } |
1214 | |
1215 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { |
1216 | struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; |
1217 | |
1218 | /* Nobody uses this, but we try. */ |
1219 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); |
1220 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; |
1221 | } |
1222 | |
1223 | if (!x->sel.family) |
1224 | x->sel.family = x->props.family; |
1225 | |
1226 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
1227 | struct sadb_x_nat_t_type* n_type; |
1228 | struct xfrm_encap_tmpl *natt; |
1229 | |
1230 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); |
1231 | if (!x->encap) |
1232 | goto out; |
1233 | |
1234 | natt = x->encap; |
1235 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; |
1236 | natt->encap_type = n_type->sadb_x_nat_t_type_type; |
1237 | |
1238 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { |
1239 | struct sadb_x_nat_t_port* n_port = |
1240 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; |
1241 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; |
1242 | } |
1243 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { |
1244 | struct sadb_x_nat_t_port* n_port = |
1245 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; |
1246 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; |
1247 | } |
1248 | memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1249 | } |
1250 | |
1251 | err = xfrm_init_state(x); |
1252 | if (err) |
1253 | goto out; |
1254 | |
1255 | x->km.seq = hdr->sadb_msg_seq; |
1256 | return x; |
1257 | |
1258 | out: |
1259 | x->km.state = XFRM_STATE_DEAD; |
1260 | xfrm_state_put(x); |
1261 | return ERR_PTR(err); |
1262 | } |
1263 | |
1264 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1265 | { |
1266 | return -EOPNOTSUPP; |
1267 | } |
1268 | |
1269 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1270 | { |
1271 | struct net *net = sock_net(sk); |
1272 | struct sk_buff *resp_skb; |
1273 | struct sadb_x_sa2 *sa2; |
1274 | struct sadb_address *saddr, *daddr; |
1275 | struct sadb_msg *out_hdr; |
1276 | struct sadb_spirange *range; |
1277 | struct xfrm_state *x = NULL; |
1278 | int mode; |
1279 | int err; |
1280 | u32 min_spi, max_spi; |
1281 | u32 reqid; |
1282 | u8 proto; |
1283 | unsigned short family; |
1284 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; |
1285 | |
1286 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1287 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) |
1288 | return -EINVAL; |
1289 | |
1290 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); |
1291 | if (proto == 0) |
1292 | return -EINVAL; |
1293 | |
1294 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { |
1295 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1296 | if (mode < 0) |
1297 | return -EINVAL; |
1298 | reqid = sa2->sadb_x_sa2_reqid; |
1299 | } else { |
1300 | mode = 0; |
1301 | reqid = 0; |
1302 | } |
1303 | |
1304 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1305 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1306 | |
1307 | family = ((struct sockaddr *)(saddr + 1))->sa_family; |
1308 | switch (family) { |
1309 | case AF_INET: |
1310 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; |
1311 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; |
1312 | break; |
1313 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1314 | case AF_INET6: |
1315 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; |
1316 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; |
1317 | break; |
1318 | #endif |
1319 | } |
1320 | |
1321 | if (hdr->sadb_msg_seq) { |
1322 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1323 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { |
1324 | xfrm_state_put(x); |
1325 | x = NULL; |
1326 | } |
1327 | } |
1328 | |
1329 | if (!x) |
1330 | x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family); |
1331 | |
1332 | if (x == NULL) |
1333 | return -ENOENT; |
1334 | |
1335 | min_spi = 0x100; |
1336 | max_spi = 0x0fffffff; |
1337 | |
1338 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1339 | if (range) { |
1340 | min_spi = range->sadb_spirange_min; |
1341 | max_spi = range->sadb_spirange_max; |
1342 | } |
1343 | |
1344 | err = xfrm_alloc_spi(x, min_spi, max_spi); |
1345 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1346 | |
1347 | if (IS_ERR(resp_skb)) { |
1348 | xfrm_state_put(x); |
1349 | return PTR_ERR(resp_skb); |
1350 | } |
1351 | |
1352 | out_hdr = (struct sadb_msg *) resp_skb->data; |
1353 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; |
1354 | out_hdr->sadb_msg_type = SADB_GETSPI; |
1355 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1356 | out_hdr->sadb_msg_errno = 0; |
1357 | out_hdr->sadb_msg_reserved = 0; |
1358 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; |
1359 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; |
1360 | |
1361 | xfrm_state_put(x); |
1362 | |
1363 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1364 | |
1365 | return 0; |
1366 | } |
1367 | |
1368 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1369 | { |
1370 | struct net *net = sock_net(sk); |
1371 | struct xfrm_state *x; |
1372 | |
1373 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) |
1374 | return -EOPNOTSUPP; |
1375 | |
1376 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) |
1377 | return 0; |
1378 | |
1379 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1380 | if (x == NULL) |
1381 | return 0; |
1382 | |
1383 | spin_lock_bh(&x->lock); |
1384 | if (x->km.state == XFRM_STATE_ACQ) { |
1385 | x->km.state = XFRM_STATE_ERROR; |
1386 | wake_up(&net->xfrm.km_waitq); |
1387 | } |
1388 | spin_unlock_bh(&x->lock); |
1389 | xfrm_state_put(x); |
1390 | return 0; |
1391 | } |
1392 | |
1393 | static inline int event2poltype(int event) |
1394 | { |
1395 | switch (event) { |
1396 | case XFRM_MSG_DELPOLICY: |
1397 | return SADB_X_SPDDELETE; |
1398 | case XFRM_MSG_NEWPOLICY: |
1399 | return SADB_X_SPDADD; |
1400 | case XFRM_MSG_UPDPOLICY: |
1401 | return SADB_X_SPDUPDATE; |
1402 | case XFRM_MSG_POLEXPIRE: |
1403 | // return SADB_X_SPDEXPIRE; |
1404 | default: |
1405 | printk("pfkey: Unknown policy event %d\n", event); |
1406 | break; |
1407 | } |
1408 | |
1409 | return 0; |
1410 | } |
1411 | |
1412 | static inline int event2keytype(int event) |
1413 | { |
1414 | switch (event) { |
1415 | case XFRM_MSG_DELSA: |
1416 | return SADB_DELETE; |
1417 | case XFRM_MSG_NEWSA: |
1418 | return SADB_ADD; |
1419 | case XFRM_MSG_UPDSA: |
1420 | return SADB_UPDATE; |
1421 | case XFRM_MSG_EXPIRE: |
1422 | return SADB_EXPIRE; |
1423 | default: |
1424 | printk("pfkey: Unknown SA event %d\n", event); |
1425 | break; |
1426 | } |
1427 | |
1428 | return 0; |
1429 | } |
1430 | |
1431 | /* ADD/UPD/DEL */ |
1432 | static int key_notify_sa(struct xfrm_state *x, struct km_event *c) |
1433 | { |
1434 | struct sk_buff *skb; |
1435 | struct sadb_msg *hdr; |
1436 | |
1437 | skb = pfkey_xfrm_state2msg(x); |
1438 | |
1439 | if (IS_ERR(skb)) |
1440 | return PTR_ERR(skb); |
1441 | |
1442 | hdr = (struct sadb_msg *) skb->data; |
1443 | hdr->sadb_msg_version = PF_KEY_V2; |
1444 | hdr->sadb_msg_type = event2keytype(c->event); |
1445 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); |
1446 | hdr->sadb_msg_errno = 0; |
1447 | hdr->sadb_msg_reserved = 0; |
1448 | hdr->sadb_msg_seq = c->seq; |
1449 | hdr->sadb_msg_pid = c->pid; |
1450 | |
1451 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
1452 | |
1453 | return 0; |
1454 | } |
1455 | |
1456 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1457 | { |
1458 | struct net *net = sock_net(sk); |
1459 | struct xfrm_state *x; |
1460 | int err; |
1461 | struct km_event c; |
1462 | |
1463 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1464 | if (IS_ERR(x)) |
1465 | return PTR_ERR(x); |
1466 | |
1467 | xfrm_state_hold(x); |
1468 | if (hdr->sadb_msg_type == SADB_ADD) |
1469 | err = xfrm_state_add(x); |
1470 | else |
1471 | err = xfrm_state_update(x); |
1472 | |
1473 | xfrm_audit_state_add(x, err ? 0 : 1, |
1474 | audit_get_loginuid(current), |
1475 | audit_get_sessionid(current), 0); |
1476 | |
1477 | if (err < 0) { |
1478 | x->km.state = XFRM_STATE_DEAD; |
1479 | __xfrm_state_put(x); |
1480 | goto out; |
1481 | } |
1482 | |
1483 | if (hdr->sadb_msg_type == SADB_ADD) |
1484 | c.event = XFRM_MSG_NEWSA; |
1485 | else |
1486 | c.event = XFRM_MSG_UPDSA; |
1487 | c.seq = hdr->sadb_msg_seq; |
1488 | c.pid = hdr->sadb_msg_pid; |
1489 | km_state_notify(x, &c); |
1490 | out: |
1491 | xfrm_state_put(x); |
1492 | return err; |
1493 | } |
1494 | |
1495 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1496 | { |
1497 | struct net *net = sock_net(sk); |
1498 | struct xfrm_state *x; |
1499 | struct km_event c; |
1500 | int err; |
1501 | |
1502 | if (!ext_hdrs[SADB_EXT_SA-1] || |
1503 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1504 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) |
1505 | return -EINVAL; |
1506 | |
1507 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1508 | if (x == NULL) |
1509 | return -ESRCH; |
1510 | |
1511 | if ((err = security_xfrm_state_delete(x))) |
1512 | goto out; |
1513 | |
1514 | if (xfrm_state_kern(x)) { |
1515 | err = -EPERM; |
1516 | goto out; |
1517 | } |
1518 | |
1519 | err = xfrm_state_delete(x); |
1520 | |
1521 | if (err < 0) |
1522 | goto out; |
1523 | |
1524 | c.seq = hdr->sadb_msg_seq; |
1525 | c.pid = hdr->sadb_msg_pid; |
1526 | c.event = XFRM_MSG_DELSA; |
1527 | km_state_notify(x, &c); |
1528 | out: |
1529 | xfrm_audit_state_delete(x, err ? 0 : 1, |
1530 | audit_get_loginuid(current), |
1531 | audit_get_sessionid(current), 0); |
1532 | xfrm_state_put(x); |
1533 | |
1534 | return err; |
1535 | } |
1536 | |
1537 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1538 | { |
1539 | struct net *net = sock_net(sk); |
1540 | __u8 proto; |
1541 | struct sk_buff *out_skb; |
1542 | struct sadb_msg *out_hdr; |
1543 | struct xfrm_state *x; |
1544 | |
1545 | if (!ext_hdrs[SADB_EXT_SA-1] || |
1546 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1547 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) |
1548 | return -EINVAL; |
1549 | |
1550 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1551 | if (x == NULL) |
1552 | return -ESRCH; |
1553 | |
1554 | out_skb = pfkey_xfrm_state2msg(x); |
1555 | proto = x->id.proto; |
1556 | xfrm_state_put(x); |
1557 | if (IS_ERR(out_skb)) |
1558 | return PTR_ERR(out_skb); |
1559 | |
1560 | out_hdr = (struct sadb_msg *) out_skb->data; |
1561 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; |
1562 | out_hdr->sadb_msg_type = SADB_GET; |
1563 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1564 | out_hdr->sadb_msg_errno = 0; |
1565 | out_hdr->sadb_msg_reserved = 0; |
1566 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; |
1567 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; |
1568 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1569 | |
1570 | return 0; |
1571 | } |
1572 | |
1573 | static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, |
1574 | gfp_t allocation) |
1575 | { |
1576 | struct sk_buff *skb; |
1577 | struct sadb_msg *hdr; |
1578 | int len, auth_len, enc_len, i; |
1579 | |
1580 | auth_len = xfrm_count_auth_supported(); |
1581 | if (auth_len) { |
1582 | auth_len *= sizeof(struct sadb_alg); |
1583 | auth_len += sizeof(struct sadb_supported); |
1584 | } |
1585 | |
1586 | enc_len = xfrm_count_enc_supported(); |
1587 | if (enc_len) { |
1588 | enc_len *= sizeof(struct sadb_alg); |
1589 | enc_len += sizeof(struct sadb_supported); |
1590 | } |
1591 | |
1592 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1593 | |
1594 | skb = alloc_skb(len + 16, allocation); |
1595 | if (!skb) |
1596 | goto out_put_algs; |
1597 | |
1598 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); |
1599 | pfkey_hdr_dup(hdr, orig); |
1600 | hdr->sadb_msg_errno = 0; |
1601 | hdr->sadb_msg_len = len / sizeof(uint64_t); |
1602 | |
1603 | if (auth_len) { |
1604 | struct sadb_supported *sp; |
1605 | struct sadb_alg *ap; |
1606 | |
1607 | sp = (struct sadb_supported *) skb_put(skb, auth_len); |
1608 | ap = (struct sadb_alg *) (sp + 1); |
1609 | |
1610 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); |
1611 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; |
1612 | |
1613 | for (i = 0; ; i++) { |
1614 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1615 | if (!aalg) |
1616 | break; |
1617 | if (aalg->available) |
1618 | *ap++ = aalg->desc; |
1619 | } |
1620 | } |
1621 | |
1622 | if (enc_len) { |
1623 | struct sadb_supported *sp; |
1624 | struct sadb_alg *ap; |
1625 | |
1626 | sp = (struct sadb_supported *) skb_put(skb, enc_len); |
1627 | ap = (struct sadb_alg *) (sp + 1); |
1628 | |
1629 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); |
1630 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; |
1631 | |
1632 | for (i = 0; ; i++) { |
1633 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1634 | if (!ealg) |
1635 | break; |
1636 | if (ealg->available) |
1637 | *ap++ = ealg->desc; |
1638 | } |
1639 | } |
1640 | |
1641 | out_put_algs: |
1642 | return skb; |
1643 | } |
1644 | |
1645 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1646 | { |
1647 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1648 | struct sk_buff *supp_skb; |
1649 | |
1650 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) |
1651 | return -EINVAL; |
1652 | |
1653 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { |
1654 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) |
1655 | return -EEXIST; |
1656 | pfk->registered |= (1<<hdr->sadb_msg_satype); |
1657 | } |
1658 | |
1659 | xfrm_probe_algs(); |
1660 | |
1661 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1662 | if (!supp_skb) { |
1663 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) |
1664 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); |
1665 | |
1666 | return -ENOBUFS; |
1667 | } |
1668 | |
1669 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk)); |
1670 | |
1671 | return 0; |
1672 | } |
1673 | |
1674 | static int unicast_flush_resp(struct sock *sk, struct sadb_msg *ihdr) |
1675 | { |
1676 | struct sk_buff *skb; |
1677 | struct sadb_msg *hdr; |
1678 | |
1679 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1680 | if (!skb) |
1681 | return -ENOBUFS; |
1682 | |
1683 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
1684 | memcpy(hdr, ihdr, sizeof(struct sadb_msg)); |
1685 | hdr->sadb_msg_errno = (uint8_t) 0; |
1686 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
1687 | |
1688 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1689 | } |
1690 | |
1691 | static int key_notify_sa_flush(struct km_event *c) |
1692 | { |
1693 | struct sk_buff *skb; |
1694 | struct sadb_msg *hdr; |
1695 | |
1696 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1697 | if (!skb) |
1698 | return -ENOBUFS; |
1699 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
1700 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
1701 | hdr->sadb_msg_type = SADB_FLUSH; |
1702 | hdr->sadb_msg_seq = c->seq; |
1703 | hdr->sadb_msg_pid = c->pid; |
1704 | hdr->sadb_msg_version = PF_KEY_V2; |
1705 | hdr->sadb_msg_errno = (uint8_t) 0; |
1706 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
1707 | |
1708 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
1709 | |
1710 | return 0; |
1711 | } |
1712 | |
1713 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1714 | { |
1715 | struct net *net = sock_net(sk); |
1716 | unsigned proto; |
1717 | struct km_event c; |
1718 | struct xfrm_audit audit_info; |
1719 | int err, err2; |
1720 | |
1721 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); |
1722 | if (proto == 0) |
1723 | return -EINVAL; |
1724 | |
1725 | audit_info.loginuid = audit_get_loginuid(current); |
1726 | audit_info.sessionid = audit_get_sessionid(current); |
1727 | audit_info.secid = 0; |
1728 | err = xfrm_state_flush(net, proto, &audit_info); |
1729 | err2 = unicast_flush_resp(sk, hdr); |
1730 | if (err || err2) { |
1731 | if (err == -ESRCH) /* empty table - go quietly */ |
1732 | err = 0; |
1733 | return err ? err : err2; |
1734 | } |
1735 | |
1736 | c.data.proto = proto; |
1737 | c.seq = hdr->sadb_msg_seq; |
1738 | c.pid = hdr->sadb_msg_pid; |
1739 | c.event = XFRM_MSG_FLUSHSA; |
1740 | c.net = net; |
1741 | km_state_notify(NULL, &c); |
1742 | |
1743 | return 0; |
1744 | } |
1745 | |
1746 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1747 | { |
1748 | struct pfkey_sock *pfk = ptr; |
1749 | struct sk_buff *out_skb; |
1750 | struct sadb_msg *out_hdr; |
1751 | |
1752 | if (!pfkey_can_dump(&pfk->sk)) |
1753 | return -ENOBUFS; |
1754 | |
1755 | out_skb = pfkey_xfrm_state2msg(x); |
1756 | if (IS_ERR(out_skb)) |
1757 | return PTR_ERR(out_skb); |
1758 | |
1759 | out_hdr = (struct sadb_msg *) out_skb->data; |
1760 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1761 | out_hdr->sadb_msg_type = SADB_DUMP; |
1762 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); |
1763 | out_hdr->sadb_msg_errno = 0; |
1764 | out_hdr->sadb_msg_reserved = 0; |
1765 | out_hdr->sadb_msg_seq = count + 1; |
1766 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
1767 | |
1768 | if (pfk->dump.skb) |
1769 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
1770 | &pfk->sk, sock_net(&pfk->sk)); |
1771 | pfk->dump.skb = out_skb; |
1772 | |
1773 | return 0; |
1774 | } |
1775 | |
1776 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1777 | { |
1778 | struct net *net = sock_net(&pfk->sk); |
1779 | return xfrm_state_walk(net, &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 | |
1787 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
1788 | { |
1789 | u8 proto; |
1790 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1791 | |
1792 | if (pfk->dump.dump != NULL) |
1793 | return -EBUSY; |
1794 | |
1795 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); |
1796 | if (proto == 0) |
1797 | return -EINVAL; |
1798 | |
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); |
1804 | |
1805 | return pfkey_do_dump(pfk); |
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, sock_net(sk)); |
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(struct net *net) |
1837 | { |
1838 | struct xfrm_policy_walk walk; |
1839 | u32 start; |
1840 | int rc; |
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; |
1848 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
1849 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
1850 | xfrm_policy_walk_done(&walk); |
1851 | if (rc != -EEXIST) |
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 net *net = xp_net(xp); |
1861 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
1862 | int mode; |
1863 | |
1864 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) |
1865 | return -ELOOP; |
1866 | |
1867 | if (rq->sadb_x_ipsecrequest_mode == 0) |
1868 | return -EINVAL; |
1869 | |
1870 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ |
1871 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1872 | return -EINVAL; |
1873 | t->mode = mode; |
1874 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1875 | t->optional = 1; |
1876 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { |
1877 | t->reqid = rq->sadb_x_ipsecrequest_reqid; |
1878 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) |
1879 | t->reqid = 0; |
1880 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1881 | return -ENOBUFS; |
1882 | } |
1883 | |
1884 | /* addresses present only in tunnel mode */ |
1885 | if (t->mode == XFRM_MODE_TUNNEL) { |
1886 | u8 *sa = (u8 *) (rq + 1); |
1887 | int family, socklen; |
1888 | |
1889 | family = pfkey_sockaddr_extract((struct sockaddr *)sa, |
1890 | &t->saddr); |
1891 | if (!family) |
1892 | return -EINVAL; |
1893 | |
1894 | socklen = pfkey_sockaddr_len(family); |
1895 | if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), |
1896 | &t->id.daddr) != family) |
1897 | return -EINVAL; |
1898 | t->encap_family = family; |
1899 | } else |
1900 | t->encap_family = xp->family; |
1901 | |
1902 | /* No way to set this via kame pfkey */ |
1903 | t->allalgs = 1; |
1904 | xp->xfrm_nr++; |
1905 | return 0; |
1906 | } |
1907 | |
1908 | static int |
1909 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) |
1910 | { |
1911 | int err; |
1912 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); |
1913 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); |
1914 | |
1915 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { |
1916 | if ((err = parse_ipsecrequest(xp, rq)) < 0) |
1917 | return err; |
1918 | len -= rq->sadb_x_ipsecrequest_len; |
1919 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); |
1920 | } |
1921 | return 0; |
1922 | } |
1923 | |
1924 | static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp) |
1925 | { |
1926 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; |
1927 | |
1928 | if (xfrm_ctx) { |
1929 | int len = sizeof(struct sadb_x_sec_ctx); |
1930 | len += xfrm_ctx->ctx_len; |
1931 | return PFKEY_ALIGN8(len); |
1932 | } |
1933 | return 0; |
1934 | } |
1935 | |
1936 | static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp) |
1937 | { |
1938 | struct xfrm_tmpl *t; |
1939 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
1940 | int socklen = 0; |
1941 | int i; |
1942 | |
1943 | for (i=0; i<xp->xfrm_nr; i++) { |
1944 | t = xp->xfrm_vec + i; |
1945 | socklen += pfkey_sockaddr_len(t->encap_family); |
1946 | } |
1947 | |
1948 | return sizeof(struct sadb_msg) + |
1949 | (sizeof(struct sadb_lifetime) * 3) + |
1950 | (sizeof(struct sadb_address) * 2) + |
1951 | (sockaddr_size * 2) + |
1952 | sizeof(struct sadb_x_policy) + |
1953 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1954 | (socklen * 2) + |
1955 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1956 | } |
1957 | |
1958 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp) |
1959 | { |
1960 | struct sk_buff *skb; |
1961 | int size; |
1962 | |
1963 | size = pfkey_xfrm_policy2msg_size(xp); |
1964 | |
1965 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
1966 | if (skb == NULL) |
1967 | return ERR_PTR(-ENOBUFS); |
1968 | |
1969 | return skb; |
1970 | } |
1971 | |
1972 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir) |
1973 | { |
1974 | struct sadb_msg *hdr; |
1975 | struct sadb_address *addr; |
1976 | struct sadb_lifetime *lifetime; |
1977 | struct sadb_x_policy *pol; |
1978 | struct sadb_x_sec_ctx *sec_ctx; |
1979 | struct xfrm_sec_ctx *xfrm_ctx; |
1980 | int i; |
1981 | int size; |
1982 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
1983 | int socklen = pfkey_sockaddr_len(xp->family); |
1984 | |
1985 | size = pfkey_xfrm_policy2msg_size(xp); |
1986 | |
1987 | /* call should fill header later */ |
1988 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
1989 | memset(hdr, 0, size); /* XXX do we need this ? */ |
1990 | |
1991 | /* src address */ |
1992 | addr = (struct sadb_address*) skb_put(skb, |
1993 | sizeof(struct sadb_address)+sockaddr_size); |
1994 | addr->sadb_address_len = |
1995 | (sizeof(struct sadb_address)+sockaddr_size)/ |
1996 | sizeof(uint64_t); |
1997 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; |
1998 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); |
1999 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; |
2000 | addr->sadb_address_reserved = 0; |
2001 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2002 | xp->selector.sport, |
2003 | (struct sockaddr *) (addr + 1), |
2004 | xp->family)) |
2005 | BUG(); |
2006 | |
2007 | /* dst address */ |
2008 | addr = (struct sadb_address*) skb_put(skb, |
2009 | sizeof(struct sadb_address)+sockaddr_size); |
2010 | addr->sadb_address_len = |
2011 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2012 | sizeof(uint64_t); |
2013 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; |
2014 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); |
2015 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
2016 | addr->sadb_address_reserved = 0; |
2017 | |
2018 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, |
2019 | (struct sockaddr *) (addr + 1), |
2020 | xp->family); |
2021 | |
2022 | /* hard time */ |
2023 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
2024 | sizeof(struct sadb_lifetime)); |
2025 | lifetime->sadb_lifetime_len = |
2026 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); |
2027 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; |
2028 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); |
2029 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); |
2030 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; |
2031 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; |
2032 | /* soft time */ |
2033 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
2034 | sizeof(struct sadb_lifetime)); |
2035 | lifetime->sadb_lifetime_len = |
2036 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); |
2037 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; |
2038 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); |
2039 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); |
2040 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; |
2041 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; |
2042 | /* current time */ |
2043 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
2044 | sizeof(struct sadb_lifetime)); |
2045 | lifetime->sadb_lifetime_len = |
2046 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); |
2047 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; |
2048 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; |
2049 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; |
2050 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; |
2051 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; |
2052 | |
2053 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); |
2054 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
2055 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; |
2056 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; |
2057 | if (xp->action == XFRM_POLICY_ALLOW) { |
2058 | if (xp->xfrm_nr) |
2059 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; |
2060 | else |
2061 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; |
2062 | } |
2063 | pol->sadb_x_policy_dir = dir+1; |
2064 | pol->sadb_x_policy_id = xp->index; |
2065 | pol->sadb_x_policy_priority = xp->priority; |
2066 | |
2067 | for (i=0; i<xp->xfrm_nr; i++) { |
2068 | struct sadb_x_ipsecrequest *rq; |
2069 | struct xfrm_tmpl *t = xp->xfrm_vec + i; |
2070 | int req_size; |
2071 | int mode; |
2072 | |
2073 | req_size = sizeof(struct sadb_x_ipsecrequest); |
2074 | if (t->mode == XFRM_MODE_TUNNEL) { |
2075 | socklen = pfkey_sockaddr_len(t->encap_family); |
2076 | req_size += socklen * 2; |
2077 | } else { |
2078 | size -= 2*socklen; |
2079 | } |
2080 | rq = (void*)skb_put(skb, req_size); |
2081 | pol->sadb_x_policy_len += req_size/8; |
2082 | memset(rq, 0, sizeof(*rq)); |
2083 | rq->sadb_x_ipsecrequest_len = req_size; |
2084 | rq->sadb_x_ipsecrequest_proto = t->id.proto; |
2085 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2086 | return -EINVAL; |
2087 | rq->sadb_x_ipsecrequest_mode = mode; |
2088 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2089 | if (t->reqid) |
2090 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; |
2091 | if (t->optional) |
2092 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; |
2093 | rq->sadb_x_ipsecrequest_reqid = t->reqid; |
2094 | |
2095 | if (t->mode == XFRM_MODE_TUNNEL) { |
2096 | u8 *sa = (void *)(rq + 1); |
2097 | pfkey_sockaddr_fill(&t->saddr, 0, |
2098 | (struct sockaddr *)sa, |
2099 | t->encap_family); |
2100 | pfkey_sockaddr_fill(&t->id.daddr, 0, |
2101 | (struct sockaddr *) (sa + socklen), |
2102 | t->encap_family); |
2103 | } |
2104 | } |
2105 | |
2106 | /* security context */ |
2107 | if ((xfrm_ctx = xp->security)) { |
2108 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); |
2109 | |
2110 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); |
2111 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); |
2112 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; |
2113 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; |
2114 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; |
2115 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; |
2116 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, |
2117 | xfrm_ctx->ctx_len); |
2118 | } |
2119 | |
2120 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2121 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); |
2122 | |
2123 | return 0; |
2124 | } |
2125 | |
2126 | static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2127 | { |
2128 | struct sk_buff *out_skb; |
2129 | struct sadb_msg *out_hdr; |
2130 | int err; |
2131 | |
2132 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2133 | if (IS_ERR(out_skb)) |
2134 | return PTR_ERR(out_skb); |
2135 | |
2136 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2137 | if (err < 0) |
2138 | return err; |
2139 | |
2140 | out_hdr = (struct sadb_msg *) out_skb->data; |
2141 | out_hdr->sadb_msg_version = PF_KEY_V2; |
2142 | |
2143 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
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, xp_net(xp)); |
2151 | return 0; |
2152 | |
2153 | } |
2154 | |
2155 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2156 | { |
2157 | struct net *net = sock_net(sk); |
2158 | int err = 0; |
2159 | struct sadb_lifetime *lifetime; |
2160 | struct sadb_address *sa; |
2161 | struct sadb_x_policy *pol; |
2162 | struct xfrm_policy *xp; |
2163 | struct km_event c; |
2164 | struct sadb_x_sec_ctx *sec_ctx; |
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(net, 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 | |
2185 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
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) |
2196 | xp->selector.sport_mask = htons(0xffff); |
2197 | |
2198 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
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) |
2209 | xp->selector.dport_mask = htons(0xffff); |
2210 | |
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 | |
2220 | err = security_xfrm_policy_alloc(&xp->security, uctx); |
2221 | kfree(uctx); |
2222 | |
2223 | if (err) |
2224 | goto out; |
2225 | } |
2226 | |
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 | |
2248 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2249 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); |
2250 | |
2251 | xfrm_audit_policy_add(xp, err ? 0 : 1, |
2252 | audit_get_loginuid(current), |
2253 | audit_get_sessionid(current), 0); |
2254 | |
2255 | if (err) |
2256 | goto out; |
2257 | |
2258 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
2259 | c.event = XFRM_MSG_UPDPOLICY; |
2260 | else |
2261 | c.event = XFRM_MSG_NEWPOLICY; |
2262 | |
2263 | c.seq = hdr->sadb_msg_seq; |
2264 | c.pid = hdr->sadb_msg_pid; |
2265 | |
2266 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2267 | xfrm_pol_put(xp); |
2268 | return 0; |
2269 | |
2270 | out: |
2271 | xp->walk.dead = 1; |
2272 | xfrm_policy_destroy(xp); |
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 | struct net *net = sock_net(sk); |
2279 | int err; |
2280 | struct sadb_address *sa; |
2281 | struct sadb_x_policy *pol; |
2282 | struct xfrm_policy *xp; |
2283 | struct xfrm_selector sel; |
2284 | struct km_event c; |
2285 | struct sadb_x_sec_ctx *sec_ctx; |
2286 | struct xfrm_sec_ctx *pol_ctx = NULL; |
2287 | |
2288 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
2289 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || |
2290 | !ext_hdrs[SADB_X_EXT_POLICY-1]) |
2291 | return -EINVAL; |
2292 | |
2293 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; |
2294 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) |
2295 | return -EINVAL; |
2296 | |
2297 | memset(&sel, 0, sizeof(sel)); |
2298 | |
2299 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
2300 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2301 | sel.prefixlen_s = sa->sadb_address_prefixlen; |
2302 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); |
2303 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; |
2304 | if (sel.sport) |
2305 | sel.sport_mask = htons(0xffff); |
2306 | |
2307 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
2308 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2309 | sel.prefixlen_d = sa->sadb_address_prefixlen; |
2310 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); |
2311 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; |
2312 | if (sel.dport) |
2313 | sel.dport_mask = htons(0xffff); |
2314 | |
2315 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2316 | if (sec_ctx != NULL) { |
2317 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); |
2318 | |
2319 | if (!uctx) |
2320 | return -ENOMEM; |
2321 | |
2322 | err = security_xfrm_policy_alloc(&pol_ctx, uctx); |
2323 | kfree(uctx); |
2324 | if (err) |
2325 | return err; |
2326 | } |
2327 | |
2328 | xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
2329 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2330 | 1, &err); |
2331 | security_xfrm_policy_free(pol_ctx); |
2332 | if (xp == NULL) |
2333 | return -ENOENT; |
2334 | |
2335 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2336 | audit_get_loginuid(current), |
2337 | audit_get_sessionid(current), 0); |
2338 | |
2339 | if (err) |
2340 | goto out; |
2341 | |
2342 | c.seq = hdr->sadb_msg_seq; |
2343 | c.pid = hdr->sadb_msg_pid; |
2344 | c.data.byid = 0; |
2345 | c.event = XFRM_MSG_DELPOLICY; |
2346 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2347 | |
2348 | out: |
2349 | xfrm_pol_put(xp); |
2350 | return err; |
2351 | } |
2352 | |
2353 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir) |
2354 | { |
2355 | int err; |
2356 | struct sk_buff *out_skb; |
2357 | struct sadb_msg *out_hdr; |
2358 | err = 0; |
2359 | |
2360 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2361 | if (IS_ERR(out_skb)) { |
2362 | err = PTR_ERR(out_skb); |
2363 | goto out; |
2364 | } |
2365 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2366 | if (err < 0) |
2367 | goto out; |
2368 | |
2369 | out_hdr = (struct sadb_msg *) out_skb->data; |
2370 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; |
2371 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
2372 | out_hdr->sadb_msg_satype = 0; |
2373 | out_hdr->sadb_msg_errno = 0; |
2374 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; |
2375 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; |
2376 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
2377 | err = 0; |
2378 | |
2379 | out: |
2380 | return err; |
2381 | } |
2382 | |
2383 | #ifdef CONFIG_NET_KEY_MIGRATE |
2384 | static int pfkey_sockaddr_pair_size(sa_family_t family) |
2385 | { |
2386 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
2387 | } |
2388 | |
2389 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
2390 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2391 | u16 *family) |
2392 | { |
2393 | int af, socklen; |
2394 | |
2395 | if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
2396 | return -EINVAL; |
2397 | |
2398 | af = pfkey_sockaddr_extract(sa, saddr); |
2399 | if (!af) |
2400 | return -EINVAL; |
2401 | |
2402 | socklen = pfkey_sockaddr_len(af); |
2403 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
2404 | daddr) != af) |
2405 | return -EINVAL; |
2406 | |
2407 | *family = af; |
2408 | return 0; |
2409 | } |
2410 | |
2411 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, |
2412 | struct xfrm_migrate *m) |
2413 | { |
2414 | int err; |
2415 | struct sadb_x_ipsecrequest *rq2; |
2416 | int mode; |
2417 | |
2418 | if (len <= sizeof(struct sadb_x_ipsecrequest) || |
2419 | len < rq1->sadb_x_ipsecrequest_len) |
2420 | return -EINVAL; |
2421 | |
2422 | /* old endoints */ |
2423 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
2424 | rq1->sadb_x_ipsecrequest_len, |
2425 | &m->old_saddr, &m->old_daddr, |
2426 | &m->old_family); |
2427 | if (err) |
2428 | return err; |
2429 | |
2430 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); |
2431 | len -= rq1->sadb_x_ipsecrequest_len; |
2432 | |
2433 | if (len <= sizeof(struct sadb_x_ipsecrequest) || |
2434 | len < rq2->sadb_x_ipsecrequest_len) |
2435 | return -EINVAL; |
2436 | |
2437 | /* new endpoints */ |
2438 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
2439 | rq2->sadb_x_ipsecrequest_len, |
2440 | &m->new_saddr, &m->new_daddr, |
2441 | &m->new_family); |
2442 | if (err) |
2443 | return err; |
2444 | |
2445 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || |
2446 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || |
2447 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) |
2448 | return -EINVAL; |
2449 | |
2450 | m->proto = rq1->sadb_x_ipsecrequest_proto; |
2451 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2452 | return -EINVAL; |
2453 | m->mode = mode; |
2454 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2455 | |
2456 | return ((int)(rq1->sadb_x_ipsecrequest_len + |
2457 | rq2->sadb_x_ipsecrequest_len)); |
2458 | } |
2459 | |
2460 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, |
2461 | struct sadb_msg *hdr, void **ext_hdrs) |
2462 | { |
2463 | int i, len, ret, err = -EINVAL; |
2464 | u8 dir; |
2465 | struct sadb_address *sa; |
2466 | struct sadb_x_kmaddress *kma; |
2467 | struct sadb_x_policy *pol; |
2468 | struct sadb_x_ipsecrequest *rq; |
2469 | struct xfrm_selector sel; |
2470 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
2471 | struct xfrm_kmaddress k; |
2472 | |
2473 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], |
2474 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
2475 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2476 | err = -EINVAL; |
2477 | goto out; |
2478 | } |
2479 | |
2480 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
2481 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
2482 | |
2483 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { |
2484 | err = -EINVAL; |
2485 | goto out; |
2486 | } |
2487 | |
2488 | if (kma) { |
2489 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ |
2490 | k.reserved = kma->sadb_x_kmaddress_reserved; |
2491 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), |
2492 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), |
2493 | &k.local, &k.remote, &k.family); |
2494 | if (ret < 0) { |
2495 | err = ret; |
2496 | goto out; |
2497 | } |
2498 | } |
2499 | |
2500 | dir = pol->sadb_x_policy_dir - 1; |
2501 | memset(&sel, 0, sizeof(sel)); |
2502 | |
2503 | /* set source address info of selector */ |
2504 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; |
2505 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2506 | sel.prefixlen_s = sa->sadb_address_prefixlen; |
2507 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); |
2508 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; |
2509 | if (sel.sport) |
2510 | sel.sport_mask = htons(0xffff); |
2511 | |
2512 | /* set destination address info of selector */ |
2513 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], |
2514 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2515 | sel.prefixlen_d = sa->sadb_address_prefixlen; |
2516 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); |
2517 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; |
2518 | if (sel.dport) |
2519 | sel.dport_mask = htons(0xffff); |
2520 | |
2521 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); |
2522 | |
2523 | /* extract ipsecrequests */ |
2524 | i = 0; |
2525 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); |
2526 | |
2527 | while (len > 0 && i < XFRM_MAX_DEPTH) { |
2528 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); |
2529 | if (ret < 0) { |
2530 | err = ret; |
2531 | goto out; |
2532 | } else { |
2533 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); |
2534 | len -= ret; |
2535 | i++; |
2536 | } |
2537 | } |
2538 | |
2539 | if (!i || len > 0) { |
2540 | err = -EINVAL; |
2541 | goto out; |
2542 | } |
2543 | |
2544 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
2545 | kma ? &k : NULL); |
2546 | |
2547 | out: |
2548 | return err; |
2549 | } |
2550 | #else |
2551 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, |
2552 | struct sadb_msg *hdr, void **ext_hdrs) |
2553 | { |
2554 | return -ENOPROTOOPT; |
2555 | } |
2556 | #endif |
2557 | |
2558 | |
2559 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2560 | { |
2561 | struct net *net = sock_net(sk); |
2562 | unsigned int dir; |
2563 | int err = 0, delete; |
2564 | struct sadb_x_policy *pol; |
2565 | struct xfrm_policy *xp; |
2566 | struct km_event c; |
2567 | |
2568 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) |
2569 | return -EINVAL; |
2570 | |
2571 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2572 | if (dir >= XFRM_POLICY_MAX) |
2573 | return -EINVAL; |
2574 | |
2575 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
2576 | xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
2577 | dir, pol->sadb_x_policy_id, delete, &err); |
2578 | if (xp == NULL) |
2579 | return -ENOENT; |
2580 | |
2581 | if (delete) { |
2582 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2583 | audit_get_loginuid(current), |
2584 | audit_get_sessionid(current), 0); |
2585 | |
2586 | if (err) |
2587 | goto out; |
2588 | c.seq = hdr->sadb_msg_seq; |
2589 | c.pid = hdr->sadb_msg_pid; |
2590 | c.data.byid = 1; |
2591 | c.event = XFRM_MSG_DELPOLICY; |
2592 | km_policy_notify(xp, dir, &c); |
2593 | } else { |
2594 | err = key_pol_get_resp(sk, xp, hdr, dir); |
2595 | } |
2596 | |
2597 | out: |
2598 | xfrm_pol_put(xp); |
2599 | return err; |
2600 | } |
2601 | |
2602 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) |
2603 | { |
2604 | struct pfkey_sock *pfk = ptr; |
2605 | struct sk_buff *out_skb; |
2606 | struct sadb_msg *out_hdr; |
2607 | int err; |
2608 | |
2609 | if (!pfkey_can_dump(&pfk->sk)) |
2610 | return -ENOBUFS; |
2611 | |
2612 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2613 | if (IS_ERR(out_skb)) |
2614 | return PTR_ERR(out_skb); |
2615 | |
2616 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2617 | if (err < 0) |
2618 | return err; |
2619 | |
2620 | out_hdr = (struct sadb_msg *) out_skb->data; |
2621 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
2622 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2623 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; |
2624 | out_hdr->sadb_msg_errno = 0; |
2625 | out_hdr->sadb_msg_seq = count + 1; |
2626 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
2627 | |
2628 | if (pfk->dump.skb) |
2629 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
2630 | &pfk->sk, sock_net(&pfk->sk)); |
2631 | pfk->dump.skb = out_skb; |
2632 | |
2633 | return 0; |
2634 | } |
2635 | |
2636 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2637 | { |
2638 | struct net *net = sock_net(&pfk->sk); |
2639 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); |
2640 | } |
2641 | |
2642 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) |
2643 | { |
2644 | xfrm_policy_walk_done(&pfk->dump.u.policy); |
2645 | } |
2646 | |
2647 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2648 | { |
2649 | struct pfkey_sock *pfk = pfkey_sk(sk); |
2650 | |
2651 | if (pfk->dump.dump != NULL) |
2652 | return -EBUSY; |
2653 | |
2654 | pfk->dump.msg_version = hdr->sadb_msg_version; |
2655 | pfk->dump.msg_pid = hdr->sadb_msg_pid; |
2656 | pfk->dump.dump = pfkey_dump_sp; |
2657 | pfk->dump.done = pfkey_dump_sp_done; |
2658 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); |
2659 | |
2660 | return pfkey_do_dump(pfk); |
2661 | } |
2662 | |
2663 | static int key_notify_policy_flush(struct km_event *c) |
2664 | { |
2665 | struct sk_buff *skb_out; |
2666 | struct sadb_msg *hdr; |
2667 | |
2668 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
2669 | if (!skb_out) |
2670 | return -ENOBUFS; |
2671 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
2672 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
2673 | hdr->sadb_msg_seq = c->seq; |
2674 | hdr->sadb_msg_pid = c->pid; |
2675 | hdr->sadb_msg_version = PF_KEY_V2; |
2676 | hdr->sadb_msg_errno = (uint8_t) 0; |
2677 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
2678 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
2679 | return 0; |
2680 | |
2681 | } |
2682 | |
2683 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs) |
2684 | { |
2685 | struct net *net = sock_net(sk); |
2686 | struct km_event c; |
2687 | struct xfrm_audit audit_info; |
2688 | int err, err2; |
2689 | |
2690 | audit_info.loginuid = audit_get_loginuid(current); |
2691 | audit_info.sessionid = audit_get_sessionid(current); |
2692 | audit_info.secid = 0; |
2693 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info); |
2694 | err2 = unicast_flush_resp(sk, hdr); |
2695 | if (err || err2) { |
2696 | if (err == -ESRCH) /* empty table - old silent behavior */ |
2697 | return 0; |
2698 | return err; |
2699 | } |
2700 | |
2701 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
2702 | c.event = XFRM_MSG_FLUSHPOLICY; |
2703 | c.pid = hdr->sadb_msg_pid; |
2704 | c.seq = hdr->sadb_msg_seq; |
2705 | c.net = net; |
2706 | km_policy_notify(NULL, 0, &c); |
2707 | |
2708 | return 0; |
2709 | } |
2710 | |
2711 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, |
2712 | struct sadb_msg *hdr, void **ext_hdrs); |
2713 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
2714 | [SADB_RESERVED] = pfkey_reserved, |
2715 | [SADB_GETSPI] = pfkey_getspi, |
2716 | [SADB_UPDATE] = pfkey_add, |
2717 | [SADB_ADD] = pfkey_add, |
2718 | [SADB_DELETE] = pfkey_delete, |
2719 | [SADB_GET] = pfkey_get, |
2720 | [SADB_ACQUIRE] = pfkey_acquire, |
2721 | [SADB_REGISTER] = pfkey_register, |
2722 | [SADB_EXPIRE] = NULL, |
2723 | [SADB_FLUSH] = pfkey_flush, |
2724 | [SADB_DUMP] = pfkey_dump, |
2725 | [SADB_X_PROMISC] = pfkey_promisc, |
2726 | [SADB_X_PCHANGE] = NULL, |
2727 | [SADB_X_SPDUPDATE] = pfkey_spdadd, |
2728 | [SADB_X_SPDADD] = pfkey_spdadd, |
2729 | [SADB_X_SPDDELETE] = pfkey_spddelete, |
2730 | [SADB_X_SPDGET] = pfkey_spdget, |
2731 | [SADB_X_SPDACQUIRE] = NULL, |
2732 | [SADB_X_SPDDUMP] = pfkey_spddump, |
2733 | [SADB_X_SPDFLUSH] = pfkey_spdflush, |
2734 | [SADB_X_SPDSETIDX] = pfkey_spdadd, |
2735 | [SADB_X_SPDDELETE2] = pfkey_spdget, |
2736 | [SADB_X_MIGRATE] = pfkey_migrate, |
2737 | }; |
2738 | |
2739 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr) |
2740 | { |
2741 | void *ext_hdrs[SADB_EXT_MAX]; |
2742 | int err; |
2743 | |
2744 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, |
2745 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
2746 | |
2747 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); |
2748 | err = parse_exthdrs(skb, hdr, ext_hdrs); |
2749 | if (!err) { |
2750 | err = -EOPNOTSUPP; |
2751 | if (pfkey_funcs[hdr->sadb_msg_type]) |
2752 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); |
2753 | } |
2754 | return err; |
2755 | } |
2756 | |
2757 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) |
2758 | { |
2759 | struct sadb_msg *hdr = NULL; |
2760 | |
2761 | if (skb->len < sizeof(*hdr)) { |
2762 | *errp = -EMSGSIZE; |
2763 | } else { |
2764 | hdr = (struct sadb_msg *) skb->data; |
2765 | if (hdr->sadb_msg_version != PF_KEY_V2 || |
2766 | hdr->sadb_msg_reserved != 0 || |
2767 | (hdr->sadb_msg_type <= SADB_RESERVED || |
2768 | hdr->sadb_msg_type > SADB_MAX)) { |
2769 | hdr = NULL; |
2770 | *errp = -EINVAL; |
2771 | } else if (hdr->sadb_msg_len != (skb->len / |
2772 | sizeof(uint64_t)) || |
2773 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / |
2774 | sizeof(uint64_t))) { |
2775 | hdr = NULL; |
2776 | *errp = -EMSGSIZE; |
2777 | } else { |
2778 | *errp = 0; |
2779 | } |
2780 | } |
2781 | return hdr; |
2782 | } |
2783 | |
2784 | static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) |
2785 | { |
2786 | unsigned int id = d->desc.sadb_alg_id; |
2787 | |
2788 | if (id >= sizeof(t->aalgos) * 8) |
2789 | return 0; |
2790 | |
2791 | return (t->aalgos >> id) & 1; |
2792 | } |
2793 | |
2794 | static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d) |
2795 | { |
2796 | unsigned int id = d->desc.sadb_alg_id; |
2797 | |
2798 | if (id >= sizeof(t->ealgos) * 8) |
2799 | return 0; |
2800 | |
2801 | return (t->ealgos >> id) & 1; |
2802 | } |
2803 | |
2804 | static int count_ah_combs(struct xfrm_tmpl *t) |
2805 | { |
2806 | int i, sz = 0; |
2807 | |
2808 | for (i = 0; ; i++) { |
2809 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
2810 | if (!aalg) |
2811 | break; |
2812 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2813 | sz += sizeof(struct sadb_comb); |
2814 | } |
2815 | return sz + sizeof(struct sadb_prop); |
2816 | } |
2817 | |
2818 | static int count_esp_combs(struct xfrm_tmpl *t) |
2819 | { |
2820 | int i, k, sz = 0; |
2821 | |
2822 | for (i = 0; ; i++) { |
2823 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
2824 | if (!ealg) |
2825 | break; |
2826 | |
2827 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2828 | continue; |
2829 | |
2830 | for (k = 1; ; k++) { |
2831 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
2832 | if (!aalg) |
2833 | break; |
2834 | |
2835 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2836 | sz += sizeof(struct sadb_comb); |
2837 | } |
2838 | } |
2839 | return sz + sizeof(struct sadb_prop); |
2840 | } |
2841 | |
2842 | static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t) |
2843 | { |
2844 | struct sadb_prop *p; |
2845 | int i; |
2846 | |
2847 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); |
2848 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2849 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; |
2850 | p->sadb_prop_replay = 32; |
2851 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); |
2852 | |
2853 | for (i = 0; ; i++) { |
2854 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
2855 | if (!aalg) |
2856 | break; |
2857 | |
2858 | if (aalg_tmpl_set(t, aalg) && aalg->available) { |
2859 | struct sadb_comb *c; |
2860 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); |
2861 | memset(c, 0, sizeof(*c)); |
2862 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; |
2863 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; |
2864 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; |
2865 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; |
2866 | c->sadb_comb_hard_addtime = 24*60*60; |
2867 | c->sadb_comb_soft_addtime = 20*60*60; |
2868 | c->sadb_comb_hard_usetime = 8*60*60; |
2869 | c->sadb_comb_soft_usetime = 7*60*60; |
2870 | } |
2871 | } |
2872 | } |
2873 | |
2874 | static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t) |
2875 | { |
2876 | struct sadb_prop *p; |
2877 | int i, k; |
2878 | |
2879 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); |
2880 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; |
2881 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; |
2882 | p->sadb_prop_replay = 32; |
2883 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); |
2884 | |
2885 | for (i=0; ; i++) { |
2886 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
2887 | if (!ealg) |
2888 | break; |
2889 | |
2890 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2891 | continue; |
2892 | |
2893 | for (k = 1; ; k++) { |
2894 | struct sadb_comb *c; |
2895 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
2896 | if (!aalg) |
2897 | break; |
2898 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) |
2899 | continue; |
2900 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); |
2901 | memset(c, 0, sizeof(*c)); |
2902 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; |
2903 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; |
2904 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; |
2905 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; |
2906 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; |
2907 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; |
2908 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; |
2909 | c->sadb_comb_hard_addtime = 24*60*60; |
2910 | c->sadb_comb_soft_addtime = 20*60*60; |
2911 | c->sadb_comb_hard_usetime = 8*60*60; |
2912 | c->sadb_comb_soft_usetime = 7*60*60; |
2913 | } |
2914 | } |
2915 | } |
2916 | |
2917 | static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c) |
2918 | { |
2919 | return 0; |
2920 | } |
2921 | |
2922 | static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) |
2923 | { |
2924 | struct sk_buff *out_skb; |
2925 | struct sadb_msg *out_hdr; |
2926 | int hard; |
2927 | int hsc; |
2928 | |
2929 | hard = c->data.hard; |
2930 | if (hard) |
2931 | hsc = 2; |
2932 | else |
2933 | hsc = 1; |
2934 | |
2935 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
2936 | if (IS_ERR(out_skb)) |
2937 | return PTR_ERR(out_skb); |
2938 | |
2939 | out_hdr = (struct sadb_msg *) out_skb->data; |
2940 | out_hdr->sadb_msg_version = PF_KEY_V2; |
2941 | out_hdr->sadb_msg_type = SADB_EXPIRE; |
2942 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); |
2943 | out_hdr->sadb_msg_errno = 0; |
2944 | out_hdr->sadb_msg_reserved = 0; |
2945 | out_hdr->sadb_msg_seq = 0; |
2946 | out_hdr->sadb_msg_pid = 0; |
2947 | |
2948 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
2949 | return 0; |
2950 | } |
2951 | |
2952 | static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) |
2953 | { |
2954 | struct net *net = x ? xs_net(x) : c->net; |
2955 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
2956 | |
2957 | if (atomic_read(&net_pfkey->socks_nr) == 0) |
2958 | return 0; |
2959 | |
2960 | switch (c->event) { |
2961 | case XFRM_MSG_EXPIRE: |
2962 | return key_notify_sa_expire(x, c); |
2963 | case XFRM_MSG_DELSA: |
2964 | case XFRM_MSG_NEWSA: |
2965 | case XFRM_MSG_UPDSA: |
2966 | return key_notify_sa(x, c); |
2967 | case XFRM_MSG_FLUSHSA: |
2968 | return key_notify_sa_flush(c); |
2969 | case XFRM_MSG_NEWAE: /* not yet supported */ |
2970 | break; |
2971 | default: |
2972 | printk("pfkey: Unknown SA event %d\n", c->event); |
2973 | break; |
2974 | } |
2975 | |
2976 | return 0; |
2977 | } |
2978 | |
2979 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
2980 | { |
2981 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
2982 | return 0; |
2983 | |
2984 | switch (c->event) { |
2985 | case XFRM_MSG_POLEXPIRE: |
2986 | return key_notify_policy_expire(xp, c); |
2987 | case XFRM_MSG_DELPOLICY: |
2988 | case XFRM_MSG_NEWPOLICY: |
2989 | case XFRM_MSG_UPDPOLICY: |
2990 | return key_notify_policy(xp, dir, c); |
2991 | case XFRM_MSG_FLUSHPOLICY: |
2992 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
2993 | break; |
2994 | return key_notify_policy_flush(c); |
2995 | default: |
2996 | printk("pfkey: Unknown policy event %d\n", c->event); |
2997 | break; |
2998 | } |
2999 | |
3000 | return 0; |
3001 | } |
3002 | |
3003 | static u32 get_acqseq(void) |
3004 | { |
3005 | u32 res; |
3006 | static atomic_t acqseq; |
3007 | |
3008 | do { |
3009 | res = atomic_inc_return(&acqseq); |
3010 | } while (!res); |
3011 | return res; |
3012 | } |
3013 | |
3014 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) |
3015 | { |
3016 | struct sk_buff *skb; |
3017 | struct sadb_msg *hdr; |
3018 | struct sadb_address *addr; |
3019 | struct sadb_x_policy *pol; |
3020 | int sockaddr_size; |
3021 | int size; |
3022 | struct sadb_x_sec_ctx *sec_ctx; |
3023 | struct xfrm_sec_ctx *xfrm_ctx; |
3024 | int ctx_size = 0; |
3025 | |
3026 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3027 | if (!sockaddr_size) |
3028 | return -EINVAL; |
3029 | |
3030 | size = sizeof(struct sadb_msg) + |
3031 | (sizeof(struct sadb_address) * 2) + |
3032 | (sockaddr_size * 2) + |
3033 | sizeof(struct sadb_x_policy); |
3034 | |
3035 | if (x->id.proto == IPPROTO_AH) |
3036 | size += count_ah_combs(t); |
3037 | else if (x->id.proto == IPPROTO_ESP) |
3038 | size += count_esp_combs(t); |
3039 | |
3040 | if ((xfrm_ctx = x->security)) { |
3041 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); |
3042 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; |
3043 | } |
3044 | |
3045 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3046 | if (skb == NULL) |
3047 | return -ENOMEM; |
3048 | |
3049 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3050 | hdr->sadb_msg_version = PF_KEY_V2; |
3051 | hdr->sadb_msg_type = SADB_ACQUIRE; |
3052 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); |
3053 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
3054 | hdr->sadb_msg_errno = 0; |
3055 | hdr->sadb_msg_reserved = 0; |
3056 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); |
3057 | hdr->sadb_msg_pid = 0; |
3058 | |
3059 | /* src address */ |
3060 | addr = (struct sadb_address*) skb_put(skb, |
3061 | sizeof(struct sadb_address)+sockaddr_size); |
3062 | addr->sadb_address_len = |
3063 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3064 | sizeof(uint64_t); |
3065 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; |
3066 | addr->sadb_address_proto = 0; |
3067 | addr->sadb_address_reserved = 0; |
3068 | addr->sadb_address_prefixlen = |
3069 | pfkey_sockaddr_fill(&x->props.saddr, 0, |
3070 | (struct sockaddr *) (addr + 1), |
3071 | x->props.family); |
3072 | if (!addr->sadb_address_prefixlen) |
3073 | BUG(); |
3074 | |
3075 | /* dst address */ |
3076 | addr = (struct sadb_address*) skb_put(skb, |
3077 | sizeof(struct sadb_address)+sockaddr_size); |
3078 | addr->sadb_address_len = |
3079 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3080 | sizeof(uint64_t); |
3081 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; |
3082 | addr->sadb_address_proto = 0; |
3083 | addr->sadb_address_reserved = 0; |
3084 | addr->sadb_address_prefixlen = |
3085 | pfkey_sockaddr_fill(&x->id.daddr, 0, |
3086 | (struct sockaddr *) (addr + 1), |
3087 | x->props.family); |
3088 | if (!addr->sadb_address_prefixlen) |
3089 | BUG(); |
3090 | |
3091 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); |
3092 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); |
3093 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; |
3094 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; |
3095 | pol->sadb_x_policy_dir = dir+1; |
3096 | pol->sadb_x_policy_id = xp->index; |
3097 | |
3098 | /* Set sadb_comb's. */ |
3099 | if (x->id.proto == IPPROTO_AH) |
3100 | dump_ah_combs(skb, t); |
3101 | else if (x->id.proto == IPPROTO_ESP) |
3102 | dump_esp_combs(skb, t); |
3103 | |
3104 | /* security context */ |
3105 | if (xfrm_ctx) { |
3106 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, |
3107 | sizeof(struct sadb_x_sec_ctx) + ctx_size); |
3108 | sec_ctx->sadb_x_sec_len = |
3109 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); |
3110 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; |
3111 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; |
3112 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; |
3113 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; |
3114 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, |
3115 | xfrm_ctx->ctx_len); |
3116 | } |
3117 | |
3118 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
3119 | } |
3120 | |
3121 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
3122 | u8 *data, int len, int *dir) |
3123 | { |
3124 | struct net *net = sock_net(sk); |
3125 | struct xfrm_policy *xp; |
3126 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; |
3127 | struct sadb_x_sec_ctx *sec_ctx; |
3128 | |
3129 | switch (sk->sk_family) { |
3130 | case AF_INET: |
3131 | if (opt != IP_IPSEC_POLICY) { |
3132 | *dir = -EOPNOTSUPP; |
3133 | return NULL; |
3134 | } |
3135 | break; |
3136 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
3137 | case AF_INET6: |
3138 | if (opt != IPV6_IPSEC_POLICY) { |
3139 | *dir = -EOPNOTSUPP; |
3140 | return NULL; |
3141 | } |
3142 | break; |
3143 | #endif |
3144 | default: |
3145 | *dir = -EINVAL; |
3146 | return NULL; |
3147 | } |
3148 | |
3149 | *dir = -EINVAL; |
3150 | |
3151 | if (len < sizeof(struct sadb_x_policy) || |
3152 | pol->sadb_x_policy_len*8 > len || |
3153 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || |
3154 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) |
3155 | return NULL; |
3156 | |
3157 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
3158 | if (xp == NULL) { |
3159 | *dir = -ENOBUFS; |
3160 | return NULL; |
3161 | } |
3162 | |
3163 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? |
3164 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); |
3165 | |
3166 | xp->lft.soft_byte_limit = XFRM_INF; |
3167 | xp->lft.hard_byte_limit = XFRM_INF; |
3168 | xp->lft.soft_packet_limit = XFRM_INF; |
3169 | xp->lft.hard_packet_limit = XFRM_INF; |
3170 | xp->family = sk->sk_family; |
3171 | |
3172 | xp->xfrm_nr = 0; |
3173 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && |
3174 | (*dir = parse_ipsecrequests(xp, pol)) < 0) |
3175 | goto out; |
3176 | |
3177 | /* security context too */ |
3178 | if (len >= (pol->sadb_x_policy_len*8 + |
3179 | sizeof(struct sadb_x_sec_ctx))) { |
3180 | char *p = (char *)pol; |
3181 | struct xfrm_user_sec_ctx *uctx; |
3182 | |
3183 | p += pol->sadb_x_policy_len*8; |
3184 | sec_ctx = (struct sadb_x_sec_ctx *)p; |
3185 | if (len < pol->sadb_x_policy_len*8 + |
3186 | sec_ctx->sadb_x_sec_len) { |
3187 | *dir = -EINVAL; |
3188 | goto out; |
3189 | } |
3190 | if ((*dir = verify_sec_ctx_len(p))) |
3191 | goto out; |
3192 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); |
3193 | *dir = security_xfrm_policy_alloc(&xp->security, uctx); |
3194 | kfree(uctx); |
3195 | |
3196 | if (*dir) |
3197 | goto out; |
3198 | } |
3199 | |
3200 | *dir = pol->sadb_x_policy_dir-1; |
3201 | return xp; |
3202 | |
3203 | out: |
3204 | xp->walk.dead = 1; |
3205 | xfrm_policy_destroy(xp); |
3206 | return NULL; |
3207 | } |
3208 | |
3209 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
3210 | { |
3211 | struct sk_buff *skb; |
3212 | struct sadb_msg *hdr; |
3213 | struct sadb_sa *sa; |
3214 | struct sadb_address *addr; |
3215 | struct sadb_x_nat_t_port *n_port; |
3216 | int sockaddr_size; |
3217 | int size; |
3218 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); |
3219 | struct xfrm_encap_tmpl *natt = NULL; |
3220 | |
3221 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3222 | if (!sockaddr_size) |
3223 | return -EINVAL; |
3224 | |
3225 | if (!satype) |
3226 | return -EINVAL; |
3227 | |
3228 | if (!x->encap) |
3229 | return -EINVAL; |
3230 | |
3231 | natt = x->encap; |
3232 | |
3233 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: |
3234 | * |
3235 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | |
3236 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) |
3237 | */ |
3238 | |
3239 | size = sizeof(struct sadb_msg) + |
3240 | sizeof(struct sadb_sa) + |
3241 | (sizeof(struct sadb_address) * 2) + |
3242 | (sockaddr_size * 2) + |
3243 | (sizeof(struct sadb_x_nat_t_port) * 2); |
3244 | |
3245 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3246 | if (skb == NULL) |
3247 | return -ENOMEM; |
3248 | |
3249 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3250 | hdr->sadb_msg_version = PF_KEY_V2; |
3251 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; |
3252 | hdr->sadb_msg_satype = satype; |
3253 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
3254 | hdr->sadb_msg_errno = 0; |
3255 | hdr->sadb_msg_reserved = 0; |
3256 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); |
3257 | hdr->sadb_msg_pid = 0; |
3258 | |
3259 | /* SA */ |
3260 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); |
3261 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); |
3262 | sa->sadb_sa_exttype = SADB_EXT_SA; |
3263 | sa->sadb_sa_spi = x->id.spi; |
3264 | sa->sadb_sa_replay = 0; |
3265 | sa->sadb_sa_state = 0; |
3266 | sa->sadb_sa_auth = 0; |
3267 | sa->sadb_sa_encrypt = 0; |
3268 | sa->sadb_sa_flags = 0; |
3269 | |
3270 | /* ADDRESS_SRC (old addr) */ |
3271 | addr = (struct sadb_address*) |
3272 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); |
3273 | addr->sadb_address_len = |
3274 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3275 | sizeof(uint64_t); |
3276 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; |
3277 | addr->sadb_address_proto = 0; |
3278 | addr->sadb_address_reserved = 0; |
3279 | addr->sadb_address_prefixlen = |
3280 | pfkey_sockaddr_fill(&x->props.saddr, 0, |
3281 | (struct sockaddr *) (addr + 1), |
3282 | x->props.family); |
3283 | if (!addr->sadb_address_prefixlen) |
3284 | BUG(); |
3285 | |
3286 | /* NAT_T_SPORT (old port) */ |
3287 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); |
3288 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3289 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; |
3290 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; |
3291 | n_port->sadb_x_nat_t_port_reserved = 0; |
3292 | |
3293 | /* ADDRESS_DST (new addr) */ |
3294 | addr = (struct sadb_address*) |
3295 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); |
3296 | addr->sadb_address_len = |
3297 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3298 | sizeof(uint64_t); |
3299 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; |
3300 | addr->sadb_address_proto = 0; |
3301 | addr->sadb_address_reserved = 0; |
3302 | addr->sadb_address_prefixlen = |
3303 | pfkey_sockaddr_fill(ipaddr, 0, |
3304 | (struct sockaddr *) (addr + 1), |
3305 | x->props.family); |
3306 | if (!addr->sadb_address_prefixlen) |
3307 | BUG(); |
3308 | |
3309 | /* NAT_T_DPORT (new port) */ |
3310 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); |
3311 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); |
3312 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; |
3313 | n_port->sadb_x_nat_t_port_port = sport; |
3314 | n_port->sadb_x_nat_t_port_reserved = 0; |
3315 | |
3316 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
3317 | } |
3318 | |
3319 | #ifdef CONFIG_NET_KEY_MIGRATE |
3320 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, |
3321 | struct xfrm_selector *sel) |
3322 | { |
3323 | struct sadb_address *addr; |
3324 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); |
3325 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; |
3326 | addr->sadb_address_exttype = type; |
3327 | addr->sadb_address_proto = sel->proto; |
3328 | addr->sadb_address_reserved = 0; |
3329 | |
3330 | switch (type) { |
3331 | case SADB_EXT_ADDRESS_SRC: |
3332 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3333 | pfkey_sockaddr_fill(&sel->saddr, 0, |
3334 | (struct sockaddr *)(addr + 1), |
3335 | sel->family); |
3336 | break; |
3337 | case SADB_EXT_ADDRESS_DST: |
3338 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3339 | pfkey_sockaddr_fill(&sel->daddr, 0, |
3340 | (struct sockaddr *)(addr + 1), |
3341 | sel->family); |
3342 | break; |
3343 | default: |
3344 | return -EINVAL; |
3345 | } |
3346 | |
3347 | return 0; |
3348 | } |
3349 | |
3350 | |
3351 | static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k) |
3352 | { |
3353 | struct sadb_x_kmaddress *kma; |
3354 | u8 *sa; |
3355 | int family = k->family; |
3356 | int socklen = pfkey_sockaddr_len(family); |
3357 | int size_req; |
3358 | |
3359 | size_req = (sizeof(struct sadb_x_kmaddress) + |
3360 | pfkey_sockaddr_pair_size(family)); |
3361 | |
3362 | kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req); |
3363 | memset(kma, 0, size_req); |
3364 | kma->sadb_x_kmaddress_len = size_req / 8; |
3365 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; |
3366 | kma->sadb_x_kmaddress_reserved = k->reserved; |
3367 | |
3368 | sa = (u8 *)(kma + 1); |
3369 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || |
3370 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) |
3371 | return -EINVAL; |
3372 | |
3373 | return 0; |
3374 | } |
3375 | |
3376 | static int set_ipsecrequest(struct sk_buff *skb, |
3377 | uint8_t proto, uint8_t mode, int level, |
3378 | uint32_t reqid, uint8_t family, |
3379 | xfrm_address_t *src, xfrm_address_t *dst) |
3380 | { |
3381 | struct sadb_x_ipsecrequest *rq; |
3382 | u8 *sa; |
3383 | int socklen = pfkey_sockaddr_len(family); |
3384 | int size_req; |
3385 | |
3386 | size_req = sizeof(struct sadb_x_ipsecrequest) + |
3387 | pfkey_sockaddr_pair_size(family); |
3388 | |
3389 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); |
3390 | memset(rq, 0, size_req); |
3391 | rq->sadb_x_ipsecrequest_len = size_req; |
3392 | rq->sadb_x_ipsecrequest_proto = proto; |
3393 | rq->sadb_x_ipsecrequest_mode = mode; |
3394 | rq->sadb_x_ipsecrequest_level = level; |
3395 | rq->sadb_x_ipsecrequest_reqid = reqid; |
3396 | |
3397 | sa = (u8 *) (rq + 1); |
3398 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || |
3399 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) |
3400 | return -EINVAL; |
3401 | |
3402 | return 0; |
3403 | } |
3404 | #endif |
3405 | |
3406 | #ifdef CONFIG_NET_KEY_MIGRATE |
3407 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
3408 | struct xfrm_migrate *m, int num_bundles, |
3409 | struct xfrm_kmaddress *k) |
3410 | { |
3411 | int i; |
3412 | int sasize_sel; |
3413 | int size = 0; |
3414 | int size_pol = 0; |
3415 | struct sk_buff *skb; |
3416 | struct sadb_msg *hdr; |
3417 | struct sadb_x_policy *pol; |
3418 | struct xfrm_migrate *mp; |
3419 | |
3420 | if (type != XFRM_POLICY_TYPE_MAIN) |
3421 | return 0; |
3422 | |
3423 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) |
3424 | return -EINVAL; |
3425 | |
3426 | if (k != NULL) { |
3427 | /* addresses for KM */ |
3428 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + |
3429 | pfkey_sockaddr_pair_size(k->family)); |
3430 | } |
3431 | |
3432 | /* selector */ |
3433 | sasize_sel = pfkey_sockaddr_size(sel->family); |
3434 | if (!sasize_sel) |
3435 | return -EINVAL; |
3436 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; |
3437 | |
3438 | /* policy info */ |
3439 | size_pol += sizeof(struct sadb_x_policy); |
3440 | |
3441 | /* ipsecrequests */ |
3442 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { |
3443 | /* old locator pair */ |
3444 | size_pol += sizeof(struct sadb_x_ipsecrequest) + |
3445 | pfkey_sockaddr_pair_size(mp->old_family); |
3446 | /* new locator pair */ |
3447 | size_pol += sizeof(struct sadb_x_ipsecrequest) + |
3448 | pfkey_sockaddr_pair_size(mp->new_family); |
3449 | } |
3450 | |
3451 | size += sizeof(struct sadb_msg) + size_pol; |
3452 | |
3453 | /* alloc buffer */ |
3454 | skb = alloc_skb(size, GFP_ATOMIC); |
3455 | if (skb == NULL) |
3456 | return -ENOMEM; |
3457 | |
3458 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); |
3459 | hdr->sadb_msg_version = PF_KEY_V2; |
3460 | hdr->sadb_msg_type = SADB_X_MIGRATE; |
3461 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); |
3462 | hdr->sadb_msg_len = size / 8; |
3463 | hdr->sadb_msg_errno = 0; |
3464 | hdr->sadb_msg_reserved = 0; |
3465 | hdr->sadb_msg_seq = 0; |
3466 | hdr->sadb_msg_pid = 0; |
3467 | |
3468 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3469 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) |
3470 | return -EINVAL; |
3471 | |
3472 | /* selector src */ |
3473 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); |
3474 | |
3475 | /* selector dst */ |
3476 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); |
3477 | |
3478 | /* policy information */ |
3479 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); |
3480 | pol->sadb_x_policy_len = size_pol / 8; |
3481 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; |
3482 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; |
3483 | pol->sadb_x_policy_dir = dir + 1; |
3484 | pol->sadb_x_policy_id = 0; |
3485 | pol->sadb_x_policy_priority = 0; |
3486 | |
3487 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { |
3488 | /* old ipsecrequest */ |
3489 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3490 | if (mode < 0) |
3491 | goto err; |
3492 | if (set_ipsecrequest(skb, mp->proto, mode, |
3493 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3494 | mp->reqid, mp->old_family, |
3495 | &mp->old_saddr, &mp->old_daddr) < 0) |
3496 | goto err; |
3497 | |
3498 | /* new ipsecrequest */ |
3499 | if (set_ipsecrequest(skb, mp->proto, mode, |
3500 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3501 | mp->reqid, mp->new_family, |
3502 | &mp->new_saddr, &mp->new_daddr) < 0) |
3503 | goto err; |
3504 | } |
3505 | |
3506 | /* broadcast migrate message to sockets */ |
3507 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
3508 | |
3509 | return 0; |
3510 | |
3511 | err: |
3512 | kfree_skb(skb); |
3513 | return -EINVAL; |
3514 | } |
3515 | #else |
3516 | static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
3517 | struct xfrm_migrate *m, int num_bundles, |
3518 | struct xfrm_kmaddress *k) |
3519 | { |
3520 | return -ENOPROTOOPT; |
3521 | } |
3522 | #endif |
3523 | |
3524 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3525 | struct socket *sock, struct msghdr *msg, size_t len) |
3526 | { |
3527 | struct sock *sk = sock->sk; |
3528 | struct sk_buff *skb = NULL; |
3529 | struct sadb_msg *hdr = NULL; |
3530 | int err; |
3531 | |
3532 | err = -EOPNOTSUPP; |
3533 | if (msg->msg_flags & MSG_OOB) |
3534 | goto out; |
3535 | |
3536 | err = -EMSGSIZE; |
3537 | if ((unsigned)len > sk->sk_sndbuf - 32) |
3538 | goto out; |
3539 | |
3540 | err = -ENOBUFS; |
3541 | skb = alloc_skb(len, GFP_KERNEL); |
3542 | if (skb == NULL) |
3543 | goto out; |
3544 | |
3545 | err = -EFAULT; |
3546 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) |
3547 | goto out; |
3548 | |
3549 | hdr = pfkey_get_base_msg(skb, &err); |
3550 | if (!hdr) |
3551 | goto out; |
3552 | |
3553 | mutex_lock(&xfrm_cfg_mutex); |
3554 | err = pfkey_process(sk, skb, hdr); |
3555 | mutex_unlock(&xfrm_cfg_mutex); |
3556 | |
3557 | out: |
3558 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) |
3559 | err = 0; |
3560 | kfree_skb(skb); |
3561 | |
3562 | return err ? : len; |
3563 | } |
3564 | |
3565 | static int pfkey_recvmsg(struct kiocb *kiocb, |
3566 | struct socket *sock, struct msghdr *msg, size_t len, |
3567 | int flags) |
3568 | { |
3569 | struct sock *sk = sock->sk; |
3570 | struct pfkey_sock *pfk = pfkey_sk(sk); |
3571 | struct sk_buff *skb; |
3572 | int copied, err; |
3573 | |
3574 | err = -EINVAL; |
3575 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) |
3576 | goto out; |
3577 | |
3578 | msg->msg_namelen = 0; |
3579 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); |
3580 | if (skb == NULL) |
3581 | goto out; |
3582 | |
3583 | copied = skb->len; |
3584 | if (copied > len) { |
3585 | msg->msg_flags |= MSG_TRUNC; |
3586 | copied = len; |
3587 | } |
3588 | |
3589 | skb_reset_transport_header(skb); |
3590 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3591 | if (err) |
3592 | goto out_free; |
3593 | |
3594 | sock_recv_ts_and_drops(msg, sk, skb); |
3595 | |
3596 | err = (flags & MSG_TRUNC) ? skb->len : copied; |
3597 | |
3598 | if (pfk->dump.dump != NULL && |
3599 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) |
3600 | pfkey_do_dump(pfk); |
3601 | |
3602 | out_free: |
3603 | skb_free_datagram(sk, skb); |
3604 | out: |
3605 | return err; |
3606 | } |
3607 | |
3608 | static const struct proto_ops pfkey_ops = { |
3609 | .family = PF_KEY, |
3610 | .owner = THIS_MODULE, |
3611 | /* Operations that make no sense on pfkey sockets. */ |
3612 | .bind = sock_no_bind, |
3613 | .connect = sock_no_connect, |
3614 | .socketpair = sock_no_socketpair, |
3615 | .accept = sock_no_accept, |
3616 | .getname = sock_no_getname, |
3617 | .ioctl = sock_no_ioctl, |
3618 | .listen = sock_no_listen, |
3619 | .shutdown = sock_no_shutdown, |
3620 | .setsockopt = sock_no_setsockopt, |
3621 | .getsockopt = sock_no_getsockopt, |
3622 | .mmap = sock_no_mmap, |
3623 | .sendpage = sock_no_sendpage, |
3624 | |
3625 | /* Now the operations that really occur. */ |
3626 | .release = pfkey_release, |
3627 | .poll = datagram_poll, |
3628 | .sendmsg = pfkey_sendmsg, |
3629 | .recvmsg = pfkey_recvmsg, |
3630 | }; |
3631 | |
3632 | static const struct net_proto_family pfkey_family_ops = { |
3633 | .family = PF_KEY, |
3634 | .create = pfkey_create, |
3635 | .owner = THIS_MODULE, |
3636 | }; |
3637 | |
3638 | #ifdef CONFIG_PROC_FS |
3639 | static int pfkey_seq_show(struct seq_file *f, void *v) |
3640 | { |
3641 | struct sock *s = sk_entry(v); |
3642 | |
3643 | if (v == SEQ_START_TOKEN) |
3644 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); |
3645 | else |
3646 | seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n", |
3647 | s, |
3648 | atomic_read(&s->sk_refcnt), |
3649 | sk_rmem_alloc_get(s), |
3650 | sk_wmem_alloc_get(s), |
3651 | sock_i_uid(s), |
3652 | sock_i_ino(s) |
3653 | ); |
3654 | return 0; |
3655 | } |
3656 | |
3657 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) |
3658 | { |
3659 | struct net *net = seq_file_net(f); |
3660 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3661 | |
3662 | rcu_read_lock(); |
3663 | return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); |
3664 | } |
3665 | |
3666 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) |
3667 | { |
3668 | struct net *net = seq_file_net(f); |
3669 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3670 | |
3671 | return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
3672 | } |
3673 | |
3674 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
3675 | { |
3676 | rcu_read_unlock(); |
3677 | } |
3678 | |
3679 | static const struct seq_operations pfkey_seq_ops = { |
3680 | .start = pfkey_seq_start, |
3681 | .next = pfkey_seq_next, |
3682 | .stop = pfkey_seq_stop, |
3683 | .show = pfkey_seq_show, |
3684 | }; |
3685 | |
3686 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3687 | { |
3688 | return seq_open_net(inode, file, &pfkey_seq_ops, |
3689 | sizeof(struct seq_net_private)); |
3690 | } |
3691 | |
3692 | static const struct file_operations pfkey_proc_ops = { |
3693 | .open = pfkey_seq_open, |
3694 | .read = seq_read, |
3695 | .llseek = seq_lseek, |
3696 | .release = seq_release_net, |
3697 | }; |
3698 | |
3699 | static int __net_init pfkey_init_proc(struct net *net) |
3700 | { |
3701 | struct proc_dir_entry *e; |
3702 | |
3703 | e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops); |
3704 | if (e == NULL) |
3705 | return -ENOMEM; |
3706 | |
3707 | return 0; |
3708 | } |
3709 | |
3710 | static void __net_exit pfkey_exit_proc(struct net *net) |
3711 | { |
3712 | proc_net_remove(net, "pfkey"); |
3713 | } |
3714 | #else |
3715 | static inline int pfkey_init_proc(struct net *net) |
3716 | { |
3717 | return 0; |
3718 | } |
3719 | |
3720 | static inline void pfkey_exit_proc(struct net *net) |
3721 | { |
3722 | } |
3723 | #endif |
3724 | |
3725 | static struct xfrm_mgr pfkeyv2_mgr = |
3726 | { |
3727 | .id = "pfkeyv2", |
3728 | .notify = pfkey_send_notify, |
3729 | .acquire = pfkey_send_acquire, |
3730 | .compile_policy = pfkey_compile_policy, |
3731 | .new_mapping = pfkey_send_new_mapping, |
3732 | .notify_policy = pfkey_send_policy_notify, |
3733 | .migrate = pfkey_send_migrate, |
3734 | }; |
3735 | |
3736 | static int __net_init pfkey_net_init(struct net *net) |
3737 | { |
3738 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3739 | int rv; |
3740 | |
3741 | INIT_HLIST_HEAD(&net_pfkey->table); |
3742 | atomic_set(&net_pfkey->socks_nr, 0); |
3743 | |
3744 | rv = pfkey_init_proc(net); |
3745 | |
3746 | return rv; |
3747 | } |
3748 | |
3749 | static void __net_exit pfkey_net_exit(struct net *net) |
3750 | { |
3751 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3752 | |
3753 | pfkey_exit_proc(net); |
3754 | BUG_ON(!hlist_empty(&net_pfkey->table)); |
3755 | } |
3756 | |
3757 | static struct pernet_operations pfkey_net_ops = { |
3758 | .init = pfkey_net_init, |
3759 | .exit = pfkey_net_exit, |
3760 | .id = &pfkey_net_id, |
3761 | .size = sizeof(struct netns_pfkey), |
3762 | }; |
3763 | |
3764 | static void __exit ipsec_pfkey_exit(void) |
3765 | { |
3766 | xfrm_unregister_km(&pfkeyv2_mgr); |
3767 | sock_unregister(PF_KEY); |
3768 | unregister_pernet_subsys(&pfkey_net_ops); |
3769 | proto_unregister(&key_proto); |
3770 | } |
3771 | |
3772 | static int __init ipsec_pfkey_init(void) |
3773 | { |
3774 | int err = proto_register(&key_proto, 0); |
3775 | |
3776 | if (err != 0) |
3777 | goto out; |
3778 | |
3779 | err = register_pernet_subsys(&pfkey_net_ops); |
3780 | if (err != 0) |
3781 | goto out_unregister_key_proto; |
3782 | err = sock_register(&pfkey_family_ops); |
3783 | if (err != 0) |
3784 | goto out_unregister_pernet; |
3785 | err = xfrm_register_km(&pfkeyv2_mgr); |
3786 | if (err != 0) |
3787 | goto out_sock_unregister; |
3788 | out: |
3789 | return err; |
3790 | |
3791 | out_sock_unregister: |
3792 | sock_unregister(PF_KEY); |
3793 | out_unregister_pernet: |
3794 | unregister_pernet_subsys(&pfkey_net_ops); |
3795 | out_unregister_key_proto: |
3796 | proto_unregister(&key_proto); |
3797 | goto out; |
3798 | } |
3799 | |
3800 | module_init(ipsec_pfkey_init); |
3801 | module_exit(ipsec_pfkey_exit); |
3802 | MODULE_LICENSE("GPL"); |
3803 | MODULE_ALIAS_NETPROTO(PF_KEY); |
3804 |
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