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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Maxim Giryaev <gem@asplinux.ru> | |
10 | * David S. Miller <davem@redhat.com> | |
11 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
12 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
13 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> | |
14 | * Derek Atkins <derek@ihtfp.com> | |
15 | */ | |
16 | ||
4fc268d2 | 17 | #include <linux/capability.h> |
1da177e4 LT |
18 | #include <linux/module.h> |
19 | #include <linux/kernel.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/pfkeyv2.h> | |
22 | #include <linux/ipsec.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/rtnetlink.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/in6.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/init.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
457c4cbc | 30 | #include <net/net_namespace.h> |
3fa87a32 | 31 | #include <net/netns/generic.h> |
1da177e4 LT |
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 | ||
f99189b1 | 39 | static int pfkey_net_id __read_mostly; |
3fa87a32 AD |
40 | struct netns_pfkey { |
41 | /* List of all pfkey sockets. */ | |
42 | struct hlist_head table; | |
43 | atomic_t socks_nr; | |
44 | }; | |
7f6b9dbd | 45 | static DEFINE_MUTEX(pfkey_mutex); |
1da177e4 | 46 | |
bd55775c JHS |
47 | #define DUMMY_MARK 0 |
48 | static struct xfrm_mark dummy_mark = {0, 0}; | |
1da177e4 LT |
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; | |
83321d6b TT |
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; | |
12a169e7 | 64 | struct sk_buff *skb; |
83321d6b | 65 | } dump; |
1da177e4 LT |
66 | }; |
67 | ||
68 | static inline struct pfkey_sock *pfkey_sk(struct sock *sk) | |
69 | { | |
70 | return (struct pfkey_sock *)sk; | |
71 | } | |
72 | ||
4c93fbb0 | 73 | static int pfkey_can_dump(const struct sock *sk) |
83321d6b TT |
74 | { |
75 | if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) | |
76 | return 1; | |
77 | return 0; | |
78 | } | |
79 | ||
05238204 | 80 | static void pfkey_terminate_dump(struct pfkey_sock *pfk) |
83321d6b | 81 | { |
05238204 | 82 | if (pfk->dump.dump) { |
12a169e7 HX |
83 | if (pfk->dump.skb) { |
84 | kfree_skb(pfk->dump.skb); | |
85 | pfk->dump.skb = NULL; | |
86 | } | |
05238204 TT |
87 | pfk->dump.done(pfk); |
88 | pfk->dump.dump = NULL; | |
89 | pfk->dump.done = NULL; | |
90 | } | |
83321d6b TT |
91 | } |
92 | ||
1da177e4 LT |
93 | static void pfkey_sock_destruct(struct sock *sk) |
94 | { | |
3fa87a32 AD |
95 | struct net *net = sock_net(sk); |
96 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
97 | ||
05238204 | 98 | pfkey_terminate_dump(pfkey_sk(sk)); |
1da177e4 LT |
99 | skb_queue_purge(&sk->sk_receive_queue); |
100 | ||
101 | if (!sock_flag(sk, SOCK_DEAD)) { | |
207024b9 | 102 | pr_err("Attempt to release alive pfkey socket: %p\n", sk); |
1da177e4 LT |
103 | return; |
104 | } | |
105 | ||
547b792c IJ |
106 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
107 | WARN_ON(atomic_read(&sk->sk_wmem_alloc)); | |
1da177e4 | 108 | |
3fa87a32 | 109 | atomic_dec(&net_pfkey->socks_nr); |
1da177e4 LT |
110 | } |
111 | ||
90ddc4f0 | 112 | static const struct proto_ops pfkey_ops; |
1da177e4 LT |
113 | |
114 | static void pfkey_insert(struct sock *sk) | |
115 | { | |
3fa87a32 AD |
116 | struct net *net = sock_net(sk); |
117 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
118 | ||
7f6b9dbd | 119 | mutex_lock(&pfkey_mutex); |
120 | sk_add_node_rcu(sk, &net_pfkey->table); | |
121 | mutex_unlock(&pfkey_mutex); | |
1da177e4 LT |
122 | } |
123 | ||
124 | static void pfkey_remove(struct sock *sk) | |
125 | { | |
7f6b9dbd | 126 | mutex_lock(&pfkey_mutex); |
127 | sk_del_node_init_rcu(sk); | |
128 | mutex_unlock(&pfkey_mutex); | |
1da177e4 LT |
129 | } |
130 | ||
131 | static struct proto key_proto = { | |
132 | .name = "KEY", | |
133 | .owner = THIS_MODULE, | |
134 | .obj_size = sizeof(struct pfkey_sock), | |
135 | }; | |
136 | ||
3f378b68 EP |
137 | static int pfkey_create(struct net *net, struct socket *sock, int protocol, |
138 | int kern) | |
1da177e4 | 139 | { |
3fa87a32 | 140 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 LT |
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; | |
6257ff21 | 152 | sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto); |
1da177e4 LT |
153 | if (sk == NULL) |
154 | goto out; | |
8ff24541 | 155 | |
1da177e4 LT |
156 | sock->ops = &pfkey_ops; |
157 | sock_init_data(sock, sk); | |
158 | ||
159 | sk->sk_family = PF_KEY; | |
160 | sk->sk_destruct = pfkey_sock_destruct; | |
161 | ||
3fa87a32 | 162 | atomic_inc(&net_pfkey->socks_nr); |
1da177e4 LT |
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); | |
7f6b9dbd | 183 | |
184 | synchronize_rcu(); | |
1da177e4 LT |
185 | sock_put(sk); |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, | |
dd0fc66f | 191 | gfp_t allocation, struct sock *sk) |
1da177e4 LT |
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 | |
dd0fc66f | 223 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
07fb0f17 AD |
224 | int broadcast_flags, struct sock *one_sk, |
225 | struct net *net) | |
1da177e4 | 226 | { |
3fa87a32 | 227 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 LT |
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 | ||
7f6b9dbd | 239 | rcu_read_lock(); |
240 | sk_for_each_rcu(sk, node, &net_pfkey->table) { | |
1da177e4 LT |
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 | } | |
7f6b9dbd | 271 | rcu_read_unlock(); |
1da177e4 LT |
272 | |
273 | if (one_sk != NULL) | |
274 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | |
275 | ||
6f961068 | 276 | kfree_skb(skb2); |
1da177e4 LT |
277 | kfree_skb(skb); |
278 | return err; | |
279 | } | |
280 | ||
05238204 TT |
281 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
282 | { | |
12a169e7 | 283 | struct sadb_msg *hdr; |
05238204 TT |
284 | int rc; |
285 | ||
286 | rc = pfk->dump.dump(pfk); | |
287 | if (rc == -ENOBUFS) | |
288 | return 0; | |
289 | ||
12a169e7 HX |
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, | |
07fb0f17 | 298 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
299 | pfk->dump.skb = NULL; |
300 | } | |
301 | ||
05238204 TT |
302 | pfkey_terminate_dump(pfk); |
303 | return rc; | |
304 | } | |
305 | ||
4c93fbb0 DM |
306 | static inline void pfkey_hdr_dup(struct sadb_msg *new, |
307 | const struct sadb_msg *orig) | |
1da177e4 LT |
308 | { |
309 | *new = *orig; | |
310 | } | |
311 | ||
4c93fbb0 | 312 | static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk) |
1da177e4 LT |
313 | { |
314 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
315 | struct sadb_msg *hdr; | |
316 | ||
317 | if (!skb) | |
318 | return -ENOBUFS; | |
319 | ||
320 | /* Woe be to the platform trying to support PFKEY yet | |
321 | * having normal errnos outside the 1-255 range, inclusive. | |
322 | */ | |
323 | err = -err; | |
324 | if (err == ERESTARTSYS || | |
325 | err == ERESTARTNOHAND || | |
326 | err == ERESTARTNOINTR) | |
327 | err = EINTR; | |
328 | if (err >= 512) | |
329 | err = EINVAL; | |
09a62660 | 330 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
331 | |
332 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
333 | pfkey_hdr_dup(hdr, orig); | |
334 | hdr->sadb_msg_errno = (uint8_t) err; | |
335 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
336 | sizeof(uint64_t)); | |
337 | ||
07fb0f17 | 338 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
339 | |
340 | return 0; | |
341 | } | |
342 | ||
343 | static u8 sadb_ext_min_len[] = { | |
344 | [SADB_EXT_RESERVED] = (u8) 0, | |
345 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
346 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
347 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
348 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
349 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
350 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
351 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
352 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
353 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
354 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
355 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
356 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
357 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
358 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
359 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
360 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
361 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
362 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
363 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
364 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
365 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
366 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
367 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 368 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
13c1d189 | 369 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
1da177e4 LT |
370 | }; |
371 | ||
372 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
4c93fbb0 | 373 | static int verify_address_len(const void *p) |
1da177e4 | 374 | { |
4c93fbb0 DM |
375 | const struct sadb_address *sp = p; |
376 | const struct sockaddr *addr = (const struct sockaddr *)(sp + 1); | |
377 | const struct sockaddr_in *sin; | |
1da177e4 | 378 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
4c93fbb0 | 379 | const struct sockaddr_in6 *sin6; |
1da177e4 LT |
380 | #endif |
381 | int len; | |
382 | ||
383 | switch (addr->sa_family) { | |
384 | case AF_INET: | |
356f89e1 | 385 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
386 | if (sp->sadb_address_len != len || |
387 | sp->sadb_address_prefixlen > 32) | |
388 | return -EINVAL; | |
389 | break; | |
390 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
391 | case AF_INET6: | |
356f89e1 | 392 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
393 | if (sp->sadb_address_len != len || |
394 | sp->sadb_address_prefixlen > 128) | |
395 | return -EINVAL; | |
396 | break; | |
397 | #endif | |
398 | default: | |
399 | /* It is user using kernel to keep track of security | |
400 | * associations for another protocol, such as | |
401 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
402 | * lengths. | |
403 | * | |
404 | * XXX Actually, association/policy database is not yet | |
405 | * XXX able to cope with arbitrary sockaddr families. | |
406 | * XXX When it can, remove this -EINVAL. -DaveM | |
407 | */ | |
408 | return -EINVAL; | |
409 | break; | |
3ff50b79 | 410 | } |
1da177e4 LT |
411 | |
412 | return 0; | |
413 | } | |
414 | ||
4c93fbb0 | 415 | static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx) |
df71837d | 416 | { |
356f89e1 IJ |
417 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
418 | sec_ctx->sadb_x_ctx_len, | |
419 | sizeof(uint64_t)); | |
df71837d TJ |
420 | } |
421 | ||
4c93fbb0 | 422 | static inline int verify_sec_ctx_len(const void *p) |
df71837d | 423 | { |
4c93fbb0 | 424 | const struct sadb_x_sec_ctx *sec_ctx = p; |
298bb621 | 425 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 426 | |
298bb621 | 427 | if (len > PAGE_SIZE) |
df71837d TJ |
428 | return -EINVAL; |
429 | ||
430 | len = pfkey_sec_ctx_len(sec_ctx); | |
431 | ||
432 | if (sec_ctx->sadb_x_sec_len != len) | |
433 | return -EINVAL; | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
4c93fbb0 | 438 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx) |
df71837d TJ |
439 | { |
440 | struct xfrm_user_sec_ctx *uctx = NULL; | |
441 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
442 | ||
443 | uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL); | |
444 | ||
445 | if (!uctx) | |
446 | return NULL; | |
447 | ||
448 | uctx->len = pfkey_sec_ctx_len(sec_ctx); | |
449 | uctx->exttype = sec_ctx->sadb_x_sec_exttype; | |
450 | uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi; | |
451 | uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg; | |
452 | uctx->ctx_len = sec_ctx->sadb_x_ctx_len; | |
453 | memcpy(uctx + 1, sec_ctx + 1, | |
454 | uctx->ctx_len); | |
455 | ||
456 | return uctx; | |
457 | } | |
458 | ||
4c93fbb0 DM |
459 | static int present_and_same_family(const struct sadb_address *src, |
460 | const struct sadb_address *dst) | |
1da177e4 | 461 | { |
4c93fbb0 | 462 | const struct sockaddr *s_addr, *d_addr; |
1da177e4 LT |
463 | |
464 | if (!src || !dst) | |
465 | return 0; | |
466 | ||
4c93fbb0 DM |
467 | s_addr = (const struct sockaddr *)(src + 1); |
468 | d_addr = (const struct sockaddr *)(dst + 1); | |
1da177e4 LT |
469 | if (s_addr->sa_family != d_addr->sa_family) |
470 | return 0; | |
471 | if (s_addr->sa_family != AF_INET | |
472 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
473 | && s_addr->sa_family != AF_INET6 | |
474 | #endif | |
475 | ) | |
476 | return 0; | |
477 | ||
478 | return 1; | |
479 | } | |
480 | ||
4c93fbb0 | 481 | static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs) |
1da177e4 | 482 | { |
4c93fbb0 | 483 | const char *p = (char *) hdr; |
1da177e4 LT |
484 | int len = skb->len; |
485 | ||
486 | len -= sizeof(*hdr); | |
487 | p += sizeof(*hdr); | |
488 | while (len > 0) { | |
4c93fbb0 | 489 | const struct sadb_ext *ehdr = (const struct sadb_ext *) p; |
1da177e4 LT |
490 | uint16_t ext_type; |
491 | int ext_len; | |
492 | ||
493 | ext_len = ehdr->sadb_ext_len; | |
494 | ext_len *= sizeof(uint64_t); | |
495 | ext_type = ehdr->sadb_ext_type; | |
496 | if (ext_len < sizeof(uint64_t) || | |
497 | ext_len > len || | |
498 | ext_type == SADB_EXT_RESERVED) | |
499 | return -EINVAL; | |
500 | ||
501 | if (ext_type <= SADB_EXT_MAX) { | |
502 | int min = (int) sadb_ext_min_len[ext_type]; | |
503 | if (ext_len < min) | |
504 | return -EINVAL; | |
505 | if (ext_hdrs[ext_type-1] != NULL) | |
506 | return -EINVAL; | |
507 | if (ext_type == SADB_EXT_ADDRESS_SRC || | |
508 | ext_type == SADB_EXT_ADDRESS_DST || | |
509 | ext_type == SADB_EXT_ADDRESS_PROXY || | |
510 | ext_type == SADB_X_EXT_NAT_T_OA) { | |
511 | if (verify_address_len(p)) | |
512 | return -EINVAL; | |
8ff24541 | 513 | } |
df71837d TJ |
514 | if (ext_type == SADB_X_EXT_SEC_CTX) { |
515 | if (verify_sec_ctx_len(p)) | |
516 | return -EINVAL; | |
517 | } | |
4c93fbb0 | 518 | ext_hdrs[ext_type-1] = (void *) p; |
1da177e4 LT |
519 | } |
520 | p += ext_len; | |
521 | len -= ext_len; | |
522 | } | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | static uint16_t | |
528 | pfkey_satype2proto(uint8_t satype) | |
529 | { | |
530 | switch (satype) { | |
531 | case SADB_SATYPE_UNSPEC: | |
532 | return IPSEC_PROTO_ANY; | |
533 | case SADB_SATYPE_AH: | |
534 | return IPPROTO_AH; | |
535 | case SADB_SATYPE_ESP: | |
536 | return IPPROTO_ESP; | |
537 | case SADB_X_SATYPE_IPCOMP: | |
538 | return IPPROTO_COMP; | |
539 | break; | |
540 | default: | |
541 | return 0; | |
542 | } | |
543 | /* NOTREACHED */ | |
544 | } | |
545 | ||
546 | static uint8_t | |
547 | pfkey_proto2satype(uint16_t proto) | |
548 | { | |
549 | switch (proto) { | |
550 | case IPPROTO_AH: | |
551 | return SADB_SATYPE_AH; | |
552 | case IPPROTO_ESP: | |
553 | return SADB_SATYPE_ESP; | |
554 | case IPPROTO_COMP: | |
555 | return SADB_X_SATYPE_IPCOMP; | |
556 | break; | |
557 | default: | |
558 | return 0; | |
559 | } | |
560 | /* NOTREACHED */ | |
561 | } | |
562 | ||
563 | /* BTW, this scheme means that there is no way with PFKEY2 sockets to | |
564 | * say specifically 'just raw sockets' as we encode them as 255. | |
565 | */ | |
566 | ||
567 | static uint8_t pfkey_proto_to_xfrm(uint8_t proto) | |
568 | { | |
a02cec21 | 569 | return proto == IPSEC_PROTO_ANY ? 0 : proto; |
1da177e4 LT |
570 | } |
571 | ||
572 | static uint8_t pfkey_proto_from_xfrm(uint8_t proto) | |
573 | { | |
a02cec21 | 574 | return proto ? proto : IPSEC_PROTO_ANY; |
1da177e4 LT |
575 | } |
576 | ||
9e8b4ed8 YH |
577 | static inline int pfkey_sockaddr_len(sa_family_t family) |
578 | { | |
579 | switch (family) { | |
580 | case AF_INET: | |
581 | return sizeof(struct sockaddr_in); | |
582 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
583 | case AF_INET6: | |
584 | return sizeof(struct sockaddr_in6); | |
585 | #endif | |
586 | } | |
587 | return 0; | |
588 | } | |
589 | ||
5f95ac91 YH |
590 | static |
591 | int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) | |
1da177e4 | 592 | { |
5f95ac91 | 593 | switch (sa->sa_family) { |
1da177e4 | 594 | case AF_INET: |
8ff24541 | 595 | xaddr->a4 = |
5f95ac91 | 596 | ((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4 LT |
597 | return AF_INET; |
598 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
599 | case AF_INET6: | |
8ff24541 | 600 | memcpy(xaddr->a6, |
5f95ac91 | 601 | &((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4 LT |
602 | sizeof(struct in6_addr)); |
603 | return AF_INET6; | |
604 | #endif | |
1da177e4 | 605 | } |
5f95ac91 YH |
606 | return 0; |
607 | } | |
608 | ||
609 | static | |
4c93fbb0 | 610 | int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr) |
5f95ac91 YH |
611 | { |
612 | return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), | |
613 | xaddr); | |
1da177e4 LT |
614 | } |
615 | ||
4c93fbb0 | 616 | static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 617 | { |
4c93fbb0 DM |
618 | const struct sadb_sa *sa; |
619 | const struct sadb_address *addr; | |
1da177e4 LT |
620 | uint16_t proto; |
621 | unsigned short family; | |
622 | xfrm_address_t *xaddr; | |
623 | ||
4c93fbb0 | 624 | sa = (const struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; |
1da177e4 LT |
625 | if (sa == NULL) |
626 | return NULL; | |
627 | ||
628 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
629 | if (proto == 0) | |
630 | return NULL; | |
631 | ||
632 | /* sadb_address_len should be checked by caller */ | |
4c93fbb0 | 633 | addr = (const struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
634 | if (addr == NULL) |
635 | return NULL; | |
636 | ||
4c93fbb0 | 637 | family = ((const struct sockaddr *)(addr + 1))->sa_family; |
1da177e4 LT |
638 | switch (family) { |
639 | case AF_INET: | |
4c93fbb0 | 640 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr; |
1da177e4 LT |
641 | break; |
642 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
643 | case AF_INET6: | |
4c93fbb0 | 644 | xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr; |
1da177e4 LT |
645 | break; |
646 | #endif | |
647 | default: | |
648 | xaddr = NULL; | |
649 | } | |
650 | ||
651 | if (!xaddr) | |
652 | return NULL; | |
653 | ||
bd55775c | 654 | return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family); |
1da177e4 LT |
655 | } |
656 | ||
657 | #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) | |
9e8b4ed8 | 658 | |
1da177e4 LT |
659 | static int |
660 | pfkey_sockaddr_size(sa_family_t family) | |
661 | { | |
9e8b4ed8 | 662 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4 LT |
663 | } |
664 | ||
55569ce2 KM |
665 | static inline int pfkey_mode_from_xfrm(int mode) |
666 | { | |
667 | switch(mode) { | |
668 | case XFRM_MODE_TRANSPORT: | |
669 | return IPSEC_MODE_TRANSPORT; | |
670 | case XFRM_MODE_TUNNEL: | |
671 | return IPSEC_MODE_TUNNEL; | |
672 | case XFRM_MODE_BEET: | |
673 | return IPSEC_MODE_BEET; | |
674 | default: | |
675 | return -1; | |
676 | } | |
677 | } | |
678 | ||
679 | static inline int pfkey_mode_to_xfrm(int mode) | |
680 | { | |
681 | switch(mode) { | |
682 | case IPSEC_MODE_ANY: /*XXX*/ | |
683 | case IPSEC_MODE_TRANSPORT: | |
684 | return XFRM_MODE_TRANSPORT; | |
685 | case IPSEC_MODE_TUNNEL: | |
686 | return XFRM_MODE_TUNNEL; | |
687 | case IPSEC_MODE_BEET: | |
688 | return XFRM_MODE_BEET; | |
689 | default: | |
690 | return -1; | |
691 | } | |
692 | } | |
693 | ||
183cad12 | 694 | static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port, |
4c93fbb0 DM |
695 | struct sockaddr *sa, |
696 | unsigned short family) | |
e5b56652 YH |
697 | { |
698 | switch (family) { | |
699 | case AF_INET: | |
700 | { | |
701 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; | |
702 | sin->sin_family = AF_INET; | |
703 | sin->sin_port = port; | |
704 | sin->sin_addr.s_addr = xaddr->a4; | |
705 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
706 | return 32; | |
707 | } | |
708 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
709 | case AF_INET6: | |
710 | { | |
711 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; | |
712 | sin6->sin6_family = AF_INET6; | |
713 | sin6->sin6_port = port; | |
714 | sin6->sin6_flowinfo = 0; | |
715 | ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6); | |
716 | sin6->sin6_scope_id = 0; | |
717 | return 128; | |
718 | } | |
719 | #endif | |
720 | } | |
721 | return 0; | |
722 | } | |
723 | ||
4c93fbb0 | 724 | static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, |
050f009e | 725 | int add_keys, int hsc) |
1da177e4 LT |
726 | { |
727 | struct sk_buff *skb; | |
728 | struct sadb_msg *hdr; | |
729 | struct sadb_sa *sa; | |
730 | struct sadb_lifetime *lifetime; | |
731 | struct sadb_address *addr; | |
732 | struct sadb_key *key; | |
733 | struct sadb_x_sa2 *sa2; | |
df71837d TJ |
734 | struct sadb_x_sec_ctx *sec_ctx; |
735 | struct xfrm_sec_ctx *xfrm_ctx; | |
736 | int ctx_size = 0; | |
1da177e4 LT |
737 | int size; |
738 | int auth_key_size = 0; | |
739 | int encrypt_key_size = 0; | |
740 | int sockaddr_size; | |
741 | struct xfrm_encap_tmpl *natt = NULL; | |
55569ce2 | 742 | int mode; |
1da177e4 LT |
743 | |
744 | /* address family check */ | |
745 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
746 | if (!sockaddr_size) | |
747 | return ERR_PTR(-EINVAL); | |
748 | ||
749 | /* base, SA, (lifetime (HSC),) address(SD), (address(P),) | |
750 | key(AE), (identity(SD),) (sensitivity)> */ | |
8ff24541 | 751 | size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4 LT |
752 | sizeof(struct sadb_lifetime) + |
753 | ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + | |
754 | ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + | |
8ff24541 | 755 | sizeof(struct sadb_address)*2 + |
1da177e4 LT |
756 | sockaddr_size*2 + |
757 | sizeof(struct sadb_x_sa2); | |
df71837d TJ |
758 | |
759 | if ((xfrm_ctx = x->security)) { | |
760 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
761 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
762 | } | |
763 | ||
1da177e4 | 764 | /* identity & sensitivity */ |
81b302a3 | 765 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4 LT |
766 | size += sizeof(struct sadb_address) + sockaddr_size; |
767 | ||
768 | if (add_keys) { | |
769 | if (x->aalg && x->aalg->alg_key_len) { | |
8ff24541 YH |
770 | auth_key_size = |
771 | PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); | |
1da177e4 LT |
772 | size += sizeof(struct sadb_key) + auth_key_size; |
773 | } | |
774 | if (x->ealg && x->ealg->alg_key_len) { | |
8ff24541 YH |
775 | encrypt_key_size = |
776 | PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); | |
1da177e4 LT |
777 | size += sizeof(struct sadb_key) + encrypt_key_size; |
778 | } | |
779 | } | |
780 | if (x->encap) | |
781 | natt = x->encap; | |
782 | ||
783 | if (natt && natt->encap_type) { | |
784 | size += sizeof(struct sadb_x_nat_t_type); | |
785 | size += sizeof(struct sadb_x_nat_t_port); | |
786 | size += sizeof(struct sadb_x_nat_t_port); | |
787 | } | |
788 | ||
789 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
790 | if (skb == NULL) | |
791 | return ERR_PTR(-ENOBUFS); | |
792 | ||
793 | /* call should fill header later */ | |
794 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
795 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
796 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
797 | ||
798 | /* sa */ | |
799 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
800 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
801 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
802 | sa->sadb_sa_spi = x->id.spi; | |
803 | sa->sadb_sa_replay = x->props.replay_window; | |
4f09f0bb HX |
804 | switch (x->km.state) { |
805 | case XFRM_STATE_VALID: | |
806 | sa->sadb_sa_state = x->km.dying ? | |
807 | SADB_SASTATE_DYING : SADB_SASTATE_MATURE; | |
808 | break; | |
809 | case XFRM_STATE_ACQ: | |
1da177e4 | 810 | sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bb HX |
811 | break; |
812 | default: | |
1da177e4 | 813 | sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bb HX |
814 | break; |
815 | } | |
1da177e4 LT |
816 | sa->sadb_sa_auth = 0; |
817 | if (x->aalg) { | |
818 | struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
819 | sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; | |
820 | } | |
821 | sa->sadb_sa_encrypt = 0; | |
822 | BUG_ON(x->ealg && x->calg); | |
823 | if (x->ealg) { | |
824 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
825 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
826 | } | |
827 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
828 | if (x->calg) { | |
829 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
830 | sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; | |
831 | } | |
832 | ||
833 | sa->sadb_sa_flags = 0; | |
834 | if (x->props.flags & XFRM_STATE_NOECN) | |
835 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
836 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
837 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
838 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
839 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
840 | |
841 | /* hard time */ | |
842 | if (hsc & 2) { | |
8ff24541 | 843 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
844 | sizeof(struct sadb_lifetime)); |
845 | lifetime->sadb_lifetime_len = | |
846 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
847 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
848 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
849 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
850 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
851 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
852 | } | |
853 | /* soft time */ | |
854 | if (hsc & 1) { | |
8ff24541 | 855 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
856 | sizeof(struct sadb_lifetime)); |
857 | lifetime->sadb_lifetime_len = | |
858 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
859 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
860 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
861 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
862 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
863 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
864 | } | |
865 | /* current time */ | |
866 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
867 | sizeof(struct sadb_lifetime)); | |
868 | lifetime->sadb_lifetime_len = | |
869 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
870 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
871 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
872 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
873 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
874 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
875 | /* src address */ | |
8ff24541 | 876 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 877 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 878 | addr->sadb_address_len = |
1da177e4 LT |
879 | (sizeof(struct sadb_address)+sockaddr_size)/ |
880 | sizeof(uint64_t); | |
881 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
882 | /* "if the ports are non-zero, then the sadb_address_proto field, |
883 | normally zero, MUST be filled in with the transport | |
1da177e4 | 884 | protocol's number." - RFC2367 */ |
8ff24541 | 885 | addr->sadb_address_proto = 0; |
1da177e4 | 886 | addr->sadb_address_reserved = 0; |
1da177e4 | 887 | |
e5b56652 YH |
888 | addr->sadb_address_prefixlen = |
889 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
890 | (struct sockaddr *) (addr + 1), | |
891 | x->props.family); | |
892 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
893 | BUG(); |
894 | ||
895 | /* dst address */ | |
8ff24541 | 896 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 897 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 898 | addr->sadb_address_len = |
1da177e4 LT |
899 | (sizeof(struct sadb_address)+sockaddr_size)/ |
900 | sizeof(uint64_t); | |
901 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 902 | addr->sadb_address_proto = 0; |
1da177e4 | 903 | addr->sadb_address_reserved = 0; |
1da177e4 | 904 | |
e5b56652 YH |
905 | addr->sadb_address_prefixlen = |
906 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
907 | (struct sockaddr *) (addr + 1), | |
908 | x->props.family); | |
909 | if (!addr->sadb_address_prefixlen) | |
910 | BUG(); | |
1da177e4 | 911 | |
e5b56652 YH |
912 | if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, |
913 | x->props.family)) { | |
914 | addr = (struct sadb_address*) skb_put(skb, | |
915 | sizeof(struct sadb_address)+sockaddr_size); | |
916 | addr->sadb_address_len = | |
917 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
918 | sizeof(uint64_t); | |
919 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
920 | addr->sadb_address_proto = | |
921 | pfkey_proto_from_xfrm(x->sel.proto); | |
922 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
923 | addr->sadb_address_reserved = 0; | |
1da177e4 | 924 | |
e5b56652 YH |
925 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
926 | (struct sockaddr *) (addr + 1), | |
927 | x->props.family); | |
1da177e4 | 928 | } |
1da177e4 LT |
929 | |
930 | /* auth key */ | |
931 | if (add_keys && auth_key_size) { | |
8ff24541 | 932 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 LT |
933 | sizeof(struct sadb_key)+auth_key_size); |
934 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
935 | sizeof(uint64_t); | |
936 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
937 | key->sadb_key_bits = x->aalg->alg_key_len; | |
938 | key->sadb_key_reserved = 0; | |
939 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
940 | } | |
941 | /* encrypt key */ | |
942 | if (add_keys && encrypt_key_size) { | |
8ff24541 | 943 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 | 944 | sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541 | 945 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
946 | encrypt_key_size) / sizeof(uint64_t); |
947 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
948 | key->sadb_key_bits = x->ealg->alg_key_len; | |
949 | key->sadb_key_reserved = 0; | |
8ff24541 | 950 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
951 | (x->ealg->alg_key_len+7)/8); |
952 | } | |
953 | ||
954 | /* sa */ | |
955 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
956 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
957 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
958 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
959 | kfree_skb(skb); | |
960 | return ERR_PTR(-EINVAL); | |
961 | } | |
962 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
963 | sa2->sadb_x_sa2_reserved1 = 0; |
964 | sa2->sadb_x_sa2_reserved2 = 0; | |
965 | sa2->sadb_x_sa2_sequence = 0; | |
966 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
967 | ||
968 | if (natt && natt->encap_type) { | |
969 | struct sadb_x_nat_t_type *n_type; | |
970 | struct sadb_x_nat_t_port *n_port; | |
971 | ||
972 | /* type */ | |
973 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
974 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
975 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
976 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
977 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
978 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
979 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
980 | ||
981 | /* source port */ | |
982 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
983 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
984 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
985 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
986 | n_port->sadb_x_nat_t_port_reserved = 0; | |
987 | ||
988 | /* dest port */ | |
989 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
990 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
991 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
992 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
993 | n_port->sadb_x_nat_t_port_reserved = 0; | |
994 | } | |
995 | ||
df71837d TJ |
996 | /* security context */ |
997 | if (xfrm_ctx) { | |
998 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
999 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
1000 | sec_ctx->sadb_x_sec_len = | |
1001 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1002 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1003 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1004 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1005 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1006 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1007 | xfrm_ctx->ctx_len); | |
1008 | } | |
1009 | ||
1da177e4 LT |
1010 | return skb; |
1011 | } | |
1012 | ||
050f009e | 1013 | |
4c93fbb0 | 1014 | static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x) |
050f009e HX |
1015 | { |
1016 | struct sk_buff *skb; | |
1017 | ||
050f009e | 1018 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1019 | |
1020 | return skb; | |
1021 | } | |
1022 | ||
4c93fbb0 | 1023 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x, |
050f009e HX |
1024 | int hsc) |
1025 | { | |
1026 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1027 | } | |
1028 | ||
07fb0f17 | 1029 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
4c93fbb0 DM |
1030 | const struct sadb_msg *hdr, |
1031 | void * const *ext_hdrs) | |
1da177e4 | 1032 | { |
8ff24541 | 1033 | struct xfrm_state *x; |
4c93fbb0 DM |
1034 | const struct sadb_lifetime *lifetime; |
1035 | const struct sadb_sa *sa; | |
1036 | const struct sadb_key *key; | |
1037 | const struct sadb_x_sec_ctx *sec_ctx; | |
1da177e4 LT |
1038 | uint16_t proto; |
1039 | int err; | |
8ff24541 | 1040 | |
1da177e4 | 1041 | |
4c93fbb0 | 1042 | sa = (const struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1]; |
1da177e4 LT |
1043 | if (!sa || |
1044 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1045 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1046 | return ERR_PTR(-EINVAL); | |
1047 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1048 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1049 | return ERR_PTR(-EINVAL); | |
1050 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1051 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1052 | return ERR_PTR(-EINVAL); | |
1053 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1054 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1055 | return ERR_PTR(-EINVAL); | |
1056 | ||
1057 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1058 | if (proto == 0) | |
1059 | return ERR_PTR(-EINVAL); | |
1060 | ||
1061 | /* default error is no buffer space */ | |
1062 | err = -ENOBUFS; | |
1063 | ||
1064 | /* RFC2367: | |
1065 | ||
1066 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1067 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1068 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1069 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1070 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1071 | not true. | |
1072 | ||
8ff24541 | 1073 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1074 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1075 | */ | |
1076 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1077 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1078 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1079 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1080 | return ERR_PTR(-EINVAL); | |
4c93fbb0 | 1081 | key = (const struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1da177e4 LT |
1082 | if (key != NULL && |
1083 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1084 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1085 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1086 | return ERR_PTR(-EINVAL); | |
1087 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1088 | if (key != NULL && | |
1089 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1090 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1091 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1092 | return ERR_PTR(-EINVAL); | |
1093 | ||
07fb0f17 | 1094 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1095 | if (x == NULL) |
1096 | return ERR_PTR(-ENOBUFS); | |
1097 | ||
1098 | x->id.proto = proto; | |
1099 | x->id.spi = sa->sadb_sa_spi; | |
1100 | x->props.replay_window = sa->sadb_sa_replay; | |
1101 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) | |
1102 | x->props.flags |= XFRM_STATE_NOECN; | |
1103 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1104 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1105 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1106 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 | 1107 | |
4c93fbb0 | 1108 | lifetime = (const struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1]; |
1da177e4 LT |
1109 | if (lifetime != NULL) { |
1110 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1111 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1112 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1113 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1114 | } | |
4c93fbb0 | 1115 | lifetime = (const struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]; |
1da177e4 LT |
1116 | if (lifetime != NULL) { |
1117 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1118 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1119 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1120 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1121 | } | |
df71837d | 1122 | |
4c93fbb0 | 1123 | sec_ctx = (const struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
df71837d TJ |
1124 | if (sec_ctx != NULL) { |
1125 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
1126 | ||
1127 | if (!uctx) | |
1128 | goto out; | |
1129 | ||
1130 | err = security_xfrm_state_alloc(x, uctx); | |
1131 | kfree(uctx); | |
1132 | ||
1133 | if (err) | |
1134 | goto out; | |
1135 | } | |
1136 | ||
4c93fbb0 | 1137 | key = (const struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1]; |
1da177e4 LT |
1138 | if (sa->sadb_sa_auth) { |
1139 | int keysize = 0; | |
1140 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
1141 | if (!a) { | |
1142 | err = -ENOSYS; | |
1143 | goto out; | |
1144 | } | |
1145 | if (key) | |
1146 | keysize = (key->sadb_key_bits + 7) / 8; | |
1147 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1148 | if (!x->aalg) | |
1149 | goto out; | |
1150 | strcpy(x->aalg->alg_name, a->name); | |
1151 | x->aalg->alg_key_len = 0; | |
1152 | if (key) { | |
1153 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1154 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1155 | } | |
c20a66f4 | 1156 | x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1da177e4 LT |
1157 | x->props.aalgo = sa->sadb_sa_auth; |
1158 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1159 | } | |
1160 | if (sa->sadb_sa_encrypt) { | |
1161 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1162 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
1163 | if (!a) { | |
1164 | err = -ENOSYS; | |
1165 | goto out; | |
1166 | } | |
1167 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1168 | if (!x->calg) | |
1169 | goto out; | |
1170 | strcpy(x->calg->alg_name, a->name); | |
1171 | x->props.calgo = sa->sadb_sa_encrypt; | |
1172 | } else { | |
1173 | int keysize = 0; | |
1174 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
1175 | if (!a) { | |
1176 | err = -ENOSYS; | |
1177 | goto out; | |
1178 | } | |
1179 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1180 | if (key) | |
1181 | keysize = (key->sadb_key_bits + 7) / 8; | |
1182 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1183 | if (!x->ealg) | |
1184 | goto out; | |
1185 | strcpy(x->ealg->alg_name, a->name); | |
1186 | x->ealg->alg_key_len = 0; | |
1187 | if (key) { | |
1188 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1189 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1190 | } | |
1191 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1192 | } | |
1193 | } | |
1194 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1195 | ||
8ff24541 | 1196 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
1197 | &x->props.saddr); |
1198 | if (!x->props.family) { | |
1199 | err = -EAFNOSUPPORT; | |
1200 | goto out; | |
1201 | } | |
8ff24541 | 1202 | pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
1203 | &x->id.daddr); |
1204 | ||
1205 | if (ext_hdrs[SADB_X_EXT_SA2-1]) { | |
4c93fbb0 | 1206 | const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1]; |
55569ce2 KM |
1207 | int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1208 | if (mode < 0) { | |
1209 | err = -EINVAL; | |
1210 | goto out; | |
1211 | } | |
1212 | x->props.mode = mode; | |
1da177e4 LT |
1213 | x->props.reqid = sa2->sadb_x_sa2_reqid; |
1214 | } | |
1215 | ||
1216 | if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { | |
4c93fbb0 | 1217 | const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; |
1da177e4 LT |
1218 | |
1219 | /* Nobody uses this, but we try. */ | |
1220 | x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr); | |
1221 | x->sel.prefixlen_s = addr->sadb_address_prefixlen; | |
1222 | } | |
1223 | ||
4da51056 | 1224 | if (!x->sel.family) |
4a4b6271 JL |
1225 | x->sel.family = x->props.family; |
1226 | ||
1da177e4 | 1227 | if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
4c93fbb0 | 1228 | const struct sadb_x_nat_t_type* n_type; |
1da177e4 LT |
1229 | struct xfrm_encap_tmpl *natt; |
1230 | ||
1231 | x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL); | |
1232 | if (!x->encap) | |
1233 | goto out; | |
1234 | ||
1235 | natt = x->encap; | |
1236 | n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]; | |
1237 | natt->encap_type = n_type->sadb_x_nat_t_type_type; | |
1238 | ||
1239 | if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) { | |
4c93fbb0 | 1240 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1241 | ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]; |
1242 | natt->encap_sport = n_port->sadb_x_nat_t_port_port; | |
1243 | } | |
1244 | if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) { | |
4c93fbb0 | 1245 | const struct sadb_x_nat_t_port *n_port = |
1da177e4 LT |
1246 | ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; |
1247 | natt->encap_dport = n_port->sadb_x_nat_t_port_port; | |
1248 | } | |
a8d694c6 | 1249 | memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1da177e4 LT |
1250 | } |
1251 | ||
72cb6962 HX |
1252 | err = xfrm_init_state(x); |
1253 | if (err) | |
1da177e4 | 1254 | goto out; |
72cb6962 | 1255 | |
1da177e4 | 1256 | x->km.seq = hdr->sadb_msg_seq; |
1da177e4 LT |
1257 | return x; |
1258 | ||
1259 | out: | |
1260 | x->km.state = XFRM_STATE_DEAD; | |
1261 | xfrm_state_put(x); | |
1262 | return ERR_PTR(err); | |
1263 | } | |
1264 | ||
4c93fbb0 | 1265 | static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1266 | { |
1267 | return -EOPNOTSUPP; | |
1268 | } | |
1269 | ||
4c93fbb0 | 1270 | static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1271 | { |
07fb0f17 | 1272 | struct net *net = sock_net(sk); |
1da177e4 LT |
1273 | struct sk_buff *resp_skb; |
1274 | struct sadb_x_sa2 *sa2; | |
1275 | struct sadb_address *saddr, *daddr; | |
1276 | struct sadb_msg *out_hdr; | |
658b219e | 1277 | struct sadb_spirange *range; |
1da177e4 | 1278 | struct xfrm_state *x = NULL; |
55569ce2 | 1279 | int mode; |
658b219e HX |
1280 | int err; |
1281 | u32 min_spi, max_spi; | |
1da177e4 LT |
1282 | u32 reqid; |
1283 | u8 proto; | |
1284 | unsigned short family; | |
1285 | xfrm_address_t *xsaddr = NULL, *xdaddr = NULL; | |
1286 | ||
1287 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1288 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1289 | return -EINVAL; | |
1290 | ||
1291 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1292 | if (proto == 0) | |
1293 | return -EINVAL; | |
1294 | ||
1295 | if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) { | |
55569ce2 KM |
1296 | mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); |
1297 | if (mode < 0) | |
1298 | return -EINVAL; | |
1da177e4 LT |
1299 | reqid = sa2->sadb_x_sa2_reqid; |
1300 | } else { | |
1301 | mode = 0; | |
1302 | reqid = 0; | |
1303 | } | |
1304 | ||
1305 | saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; | |
1306 | daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; | |
1307 | ||
1308 | family = ((struct sockaddr *)(saddr + 1))->sa_family; | |
1309 | switch (family) { | |
1310 | case AF_INET: | |
1311 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr; | |
1312 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr; | |
1313 | break; | |
1314 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1315 | case AF_INET6: | |
1316 | xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr; | |
1317 | xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr; | |
1318 | break; | |
1319 | #endif | |
1320 | } | |
1321 | ||
1322 | if (hdr->sadb_msg_seq) { | |
bd55775c | 1323 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4 LT |
1324 | if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { |
1325 | xfrm_state_put(x); | |
1326 | x = NULL; | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | if (!x) | |
bd55775c | 1331 | x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family); |
1da177e4 LT |
1332 | |
1333 | if (x == NULL) | |
1334 | return -ENOENT; | |
1335 | ||
658b219e HX |
1336 | min_spi = 0x100; |
1337 | max_spi = 0x0fffffff; | |
1da177e4 | 1338 | |
658b219e HX |
1339 | range = ext_hdrs[SADB_EXT_SPIRANGE-1]; |
1340 | if (range) { | |
1341 | min_spi = range->sadb_spirange_min; | |
1342 | max_spi = range->sadb_spirange_max; | |
1da177e4 | 1343 | } |
658b219e HX |
1344 | |
1345 | err = xfrm_alloc_spi(x, min_spi, max_spi); | |
050f009e | 1346 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1347 | |
1348 | if (IS_ERR(resp_skb)) { | |
1349 | xfrm_state_put(x); | |
1350 | return PTR_ERR(resp_skb); | |
1351 | } | |
1352 | ||
1353 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1354 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1355 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1356 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1357 | out_hdr->sadb_msg_errno = 0; | |
1358 | out_hdr->sadb_msg_reserved = 0; | |
1359 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1360 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1361 | ||
1362 | xfrm_state_put(x); | |
1363 | ||
07fb0f17 | 1364 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4 LT |
1365 | |
1366 | return 0; | |
1367 | } | |
1368 | ||
4c93fbb0 | 1369 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1370 | { |
07fb0f17 | 1371 | struct net *net = sock_net(sk); |
1da177e4 LT |
1372 | struct xfrm_state *x; |
1373 | ||
1374 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1375 | return -EOPNOTSUPP; | |
1376 | ||
1377 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1378 | return 0; | |
1379 | ||
bd55775c | 1380 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4 LT |
1381 | if (x == NULL) |
1382 | return 0; | |
1383 | ||
1384 | spin_lock_bh(&x->lock); | |
1385 | if (x->km.state == XFRM_STATE_ACQ) { | |
1386 | x->km.state = XFRM_STATE_ERROR; | |
07fb0f17 | 1387 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
1388 | } |
1389 | spin_unlock_bh(&x->lock); | |
1390 | xfrm_state_put(x); | |
1391 | return 0; | |
1392 | } | |
1393 | ||
26b15dad JHS |
1394 | static inline int event2poltype(int event) |
1395 | { | |
1396 | switch (event) { | |
f60f6b8f | 1397 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1398 | return SADB_X_SPDDELETE; |
f60f6b8f | 1399 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1400 | return SADB_X_SPDADD; |
f60f6b8f | 1401 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1402 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1403 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1404 | // return SADB_X_SPDEXPIRE; |
1405 | default: | |
207024b9 | 1406 | pr_err("pfkey: Unknown policy event %d\n", event); |
26b15dad JHS |
1407 | break; |
1408 | } | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | static inline int event2keytype(int event) | |
1414 | { | |
1415 | switch (event) { | |
f60f6b8f | 1416 | case XFRM_MSG_DELSA: |
26b15dad | 1417 | return SADB_DELETE; |
f60f6b8f | 1418 | case XFRM_MSG_NEWSA: |
26b15dad | 1419 | return SADB_ADD; |
f60f6b8f | 1420 | case XFRM_MSG_UPDSA: |
26b15dad | 1421 | return SADB_UPDATE; |
f60f6b8f | 1422 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1423 | return SADB_EXPIRE; |
1424 | default: | |
207024b9 | 1425 | pr_err("pfkey: Unknown SA event %d\n", event); |
26b15dad JHS |
1426 | break; |
1427 | } | |
1428 | ||
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | /* ADD/UPD/DEL */ | |
214e005b | 1433 | static int key_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1434 | { |
1435 | struct sk_buff *skb; | |
1436 | struct sadb_msg *hdr; | |
26b15dad | 1437 | |
050f009e | 1438 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1439 | |
1440 | if (IS_ERR(skb)) | |
1441 | return PTR_ERR(skb); | |
1442 | ||
1443 | hdr = (struct sadb_msg *) skb->data; | |
1444 | hdr->sadb_msg_version = PF_KEY_V2; | |
1445 | hdr->sadb_msg_type = event2keytype(c->event); | |
1446 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1447 | hdr->sadb_msg_errno = 0; | |
1448 | hdr->sadb_msg_reserved = 0; | |
1449 | hdr->sadb_msg_seq = c->seq; | |
1450 | hdr->sadb_msg_pid = c->pid; | |
1451 | ||
07fb0f17 | 1452 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad JHS |
1453 | |
1454 | return 0; | |
1455 | } | |
1da177e4 | 1456 | |
4c93fbb0 | 1457 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1458 | { |
07fb0f17 | 1459 | struct net *net = sock_net(sk); |
1da177e4 LT |
1460 | struct xfrm_state *x; |
1461 | int err; | |
26b15dad | 1462 | struct km_event c; |
1da177e4 | 1463 | |
07fb0f17 | 1464 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4 LT |
1465 | if (IS_ERR(x)) |
1466 | return PTR_ERR(x); | |
1467 | ||
26b15dad | 1468 | xfrm_state_hold(x); |
1da177e4 LT |
1469 | if (hdr->sadb_msg_type == SADB_ADD) |
1470 | err = xfrm_state_add(x); | |
1471 | else | |
1472 | err = xfrm_state_update(x); | |
1473 | ||
ab5f5e8b | 1474 | xfrm_audit_state_add(x, err ? 0 : 1, |
2532386f EP |
1475 | audit_get_loginuid(current), |
1476 | audit_get_sessionid(current), 0); | |
161a09e7 | 1477 | |
1da177e4 LT |
1478 | if (err < 0) { |
1479 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1480 | __xfrm_state_put(x); |
7d6dfe1f | 1481 | goto out; |
1da177e4 LT |
1482 | } |
1483 | ||
26b15dad | 1484 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1485 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1486 | else |
f60f6b8f | 1487 | c.event = XFRM_MSG_UPDSA; |
26b15dad JHS |
1488 | c.seq = hdr->sadb_msg_seq; |
1489 | c.pid = hdr->sadb_msg_pid; | |
1490 | km_state_notify(x, &c); | |
7d6dfe1f | 1491 | out: |
26b15dad | 1492 | xfrm_state_put(x); |
26b15dad | 1493 | return err; |
1da177e4 LT |
1494 | } |
1495 | ||
4c93fbb0 | 1496 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1497 | { |
07fb0f17 | 1498 | struct net *net = sock_net(sk); |
1da177e4 | 1499 | struct xfrm_state *x; |
26b15dad JHS |
1500 | struct km_event c; |
1501 | int err; | |
1da177e4 LT |
1502 | |
1503 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1504 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1505 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1506 | return -EINVAL; | |
1507 | ||
07fb0f17 | 1508 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1509 | if (x == NULL) |
1510 | return -ESRCH; | |
1511 | ||
c8c05a8e CZ |
1512 | if ((err = security_xfrm_state_delete(x))) |
1513 | goto out; | |
1514 | ||
1da177e4 | 1515 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1516 | err = -EPERM; |
1517 | goto out; | |
1da177e4 | 1518 | } |
161a09e7 | 1519 | |
26b15dad | 1520 | err = xfrm_state_delete(x); |
161a09e7 | 1521 | |
c8c05a8e CZ |
1522 | if (err < 0) |
1523 | goto out; | |
1da177e4 | 1524 | |
26b15dad JHS |
1525 | c.seq = hdr->sadb_msg_seq; |
1526 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1527 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1528 | km_state_notify(x, &c); |
c8c05a8e | 1529 | out: |
ab5f5e8b | 1530 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
1531 | audit_get_loginuid(current), |
1532 | audit_get_sessionid(current), 0); | |
26b15dad | 1533 | xfrm_state_put(x); |
1da177e4 | 1534 | |
26b15dad | 1535 | return err; |
1da177e4 LT |
1536 | } |
1537 | ||
4c93fbb0 | 1538 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1539 | { |
07fb0f17 | 1540 | struct net *net = sock_net(sk); |
1da177e4 LT |
1541 | __u8 proto; |
1542 | struct sk_buff *out_skb; | |
1543 | struct sadb_msg *out_hdr; | |
1544 | struct xfrm_state *x; | |
1545 | ||
1546 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1547 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1548 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1549 | return -EINVAL; | |
1550 | ||
07fb0f17 | 1551 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1552 | if (x == NULL) |
1553 | return -ESRCH; | |
1554 | ||
050f009e | 1555 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1556 | proto = x->id.proto; |
1557 | xfrm_state_put(x); | |
1558 | if (IS_ERR(out_skb)) | |
1559 | return PTR_ERR(out_skb); | |
1560 | ||
1561 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1562 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1563 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1564 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1565 | out_hdr->sadb_msg_errno = 0; | |
1566 | out_hdr->sadb_msg_reserved = 0; | |
1567 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1568 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
07fb0f17 | 1569 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
1570 | |
1571 | return 0; | |
1572 | } | |
1573 | ||
4c93fbb0 | 1574 | static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, |
dd0fc66f | 1575 | gfp_t allocation) |
1da177e4 LT |
1576 | { |
1577 | struct sk_buff *skb; | |
1578 | struct sadb_msg *hdr; | |
1579 | int len, auth_len, enc_len, i; | |
1580 | ||
1581 | auth_len = xfrm_count_auth_supported(); | |
1582 | if (auth_len) { | |
1583 | auth_len *= sizeof(struct sadb_alg); | |
1584 | auth_len += sizeof(struct sadb_supported); | |
1585 | } | |
8ff24541 | 1586 | |
1da177e4 LT |
1587 | enc_len = xfrm_count_enc_supported(); |
1588 | if (enc_len) { | |
1589 | enc_len *= sizeof(struct sadb_alg); | |
1590 | enc_len += sizeof(struct sadb_supported); | |
1591 | } | |
8ff24541 | 1592 | |
1da177e4 LT |
1593 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1594 | ||
1595 | skb = alloc_skb(len + 16, allocation); | |
1596 | if (!skb) | |
1597 | goto out_put_algs; | |
1598 | ||
1599 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1600 | pfkey_hdr_dup(hdr, orig); | |
1601 | hdr->sadb_msg_errno = 0; | |
1602 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1603 | ||
1604 | if (auth_len) { | |
1605 | struct sadb_supported *sp; | |
1606 | struct sadb_alg *ap; | |
1607 | ||
1608 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1609 | ap = (struct sadb_alg *) (sp + 1); | |
1610 | ||
1611 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1612 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1613 | ||
1614 | for (i = 0; ; i++) { | |
1615 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1616 | if (!aalg) | |
1617 | break; | |
1618 | if (aalg->available) | |
1619 | *ap++ = aalg->desc; | |
1620 | } | |
1621 | } | |
1622 | ||
1623 | if (enc_len) { | |
1624 | struct sadb_supported *sp; | |
1625 | struct sadb_alg *ap; | |
1626 | ||
1627 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1628 | ap = (struct sadb_alg *) (sp + 1); | |
1629 | ||
1630 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1631 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1632 | ||
1633 | for (i = 0; ; i++) { | |
1634 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1635 | if (!ealg) | |
1636 | break; | |
1637 | if (ealg->available) | |
1638 | *ap++ = ealg->desc; | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | out_put_algs: | |
1643 | return skb; | |
1644 | } | |
1645 | ||
4c93fbb0 | 1646 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1647 | { |
1648 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1649 | struct sk_buff *supp_skb; | |
1650 | ||
1651 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1652 | return -EINVAL; | |
1653 | ||
1654 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1655 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1656 | return -EEXIST; | |
1657 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1658 | } | |
1659 | ||
1660 | xfrm_probe_algs(); | |
8ff24541 | 1661 | |
1da177e4 LT |
1662 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1663 | if (!supp_skb) { | |
1664 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1665 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1666 | ||
1667 | return -ENOBUFS; | |
1668 | } | |
1669 | ||
07fb0f17 | 1670 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk)); |
1da177e4 LT |
1671 | |
1672 | return 0; | |
1673 | } | |
1674 | ||
4c93fbb0 | 1675 | static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr) |
8be987d7 JHS |
1676 | { |
1677 | struct sk_buff *skb; | |
1678 | struct sadb_msg *hdr; | |
1679 | ||
1680 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1681 | if (!skb) | |
1682 | return -ENOBUFS; | |
1683 | ||
1684 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
1685 | memcpy(hdr, ihdr, sizeof(struct sadb_msg)); | |
1686 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1687 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1688 | ||
1689 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); | |
1690 | } | |
1691 | ||
214e005b | 1692 | static int key_notify_sa_flush(const struct km_event *c) |
26b15dad JHS |
1693 | { |
1694 | struct sk_buff *skb; | |
1695 | struct sadb_msg *hdr; | |
1696 | ||
1697 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1698 | if (!skb) | |
1699 | return -ENOBUFS; | |
1700 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1701 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1702 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad JHS |
1703 | hdr->sadb_msg_seq = c->seq; |
1704 | hdr->sadb_msg_pid = c->pid; | |
1705 | hdr->sadb_msg_version = PF_KEY_V2; | |
1706 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1707 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1708 | ||
07fb0f17 | 1709 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad JHS |
1710 | |
1711 | return 0; | |
1712 | } | |
1713 | ||
4c93fbb0 | 1714 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1715 | { |
07fb0f17 | 1716 | struct net *net = sock_net(sk); |
1da177e4 | 1717 | unsigned proto; |
26b15dad | 1718 | struct km_event c; |
161a09e7 | 1719 | struct xfrm_audit audit_info; |
8be987d7 | 1720 | int err, err2; |
1da177e4 LT |
1721 | |
1722 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1723 | if (proto == 0) | |
1724 | return -EINVAL; | |
1725 | ||
0c11b942 | 1726 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 1727 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 1728 | audit_info.secid = 0; |
07fb0f17 | 1729 | err = xfrm_state_flush(net, proto, &audit_info); |
8be987d7 | 1730 | err2 = unicast_flush_resp(sk, hdr); |
9e64cc95 JHS |
1731 | if (err || err2) { |
1732 | if (err == -ESRCH) /* empty table - go quietly */ | |
1733 | err = 0; | |
8be987d7 | 1734 | return err ? err : err2; |
9e64cc95 | 1735 | } |
8be987d7 | 1736 | |
bf08867f | 1737 | c.data.proto = proto; |
26b15dad JHS |
1738 | c.seq = hdr->sadb_msg_seq; |
1739 | c.pid = hdr->sadb_msg_pid; | |
f60f6b8f | 1740 | c.event = XFRM_MSG_FLUSHSA; |
07fb0f17 | 1741 | c.net = net; |
26b15dad | 1742 | km_state_notify(NULL, &c); |
1da177e4 LT |
1743 | |
1744 | return 0; | |
1745 | } | |
1746 | ||
1da177e4 LT |
1747 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1748 | { | |
83321d6b | 1749 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1750 | struct sk_buff *out_skb; |
1751 | struct sadb_msg *out_hdr; | |
1752 | ||
83321d6b TT |
1753 | if (!pfkey_can_dump(&pfk->sk)) |
1754 | return -ENOBUFS; | |
1755 | ||
050f009e | 1756 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1757 | if (IS_ERR(out_skb)) |
1758 | return PTR_ERR(out_skb); | |
1759 | ||
1760 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1761 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1762 | out_hdr->sadb_msg_type = SADB_DUMP; |
1763 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1764 | out_hdr->sadb_msg_errno = 0; | |
1765 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1766 | out_hdr->sadb_msg_seq = count + 1; |
83321d6b | 1767 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
12a169e7 HX |
1768 | |
1769 | if (pfk->dump.skb) | |
1770 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 1771 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
1772 | pfk->dump.skb = out_skb; |
1773 | ||
1da177e4 LT |
1774 | return 0; |
1775 | } | |
1776 | ||
83321d6b TT |
1777 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1778 | { | |
07fb0f17 AD |
1779 | struct net *net = sock_net(&pfk->sk); |
1780 | return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); | |
83321d6b TT |
1781 | } |
1782 | ||
1783 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1784 | { | |
1785 | xfrm_state_walk_done(&pfk->dump.u.state); | |
1786 | } | |
1787 | ||
4c93fbb0 | 1788 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1789 | { |
1790 | u8 proto; | |
83321d6b TT |
1791 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1792 | ||
1793 | if (pfk->dump.dump != NULL) | |
1794 | return -EBUSY; | |
1da177e4 LT |
1795 | |
1796 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1797 | if (proto == 0) | |
1798 | return -EINVAL; | |
1799 | ||
83321d6b TT |
1800 | pfk->dump.msg_version = hdr->sadb_msg_version; |
1801 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
1802 | pfk->dump.dump = pfkey_dump_sa; | |
1803 | pfk->dump.done = pfkey_dump_sa_done; | |
1804 | xfrm_state_walk_init(&pfk->dump.u.state, proto); | |
4c563f76 | 1805 | |
83321d6b | 1806 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1807 | } |
1808 | ||
4c93fbb0 | 1809 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1810 | { |
1811 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1812 | int satype = hdr->sadb_msg_satype; | |
4c93fbb0 | 1813 | bool reset_errno = false; |
1da177e4 LT |
1814 | |
1815 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
4c93fbb0 | 1816 | reset_errno = true; |
1da177e4 LT |
1817 | if (satype != 0 && satype != 1) |
1818 | return -EINVAL; | |
1819 | pfk->promisc = satype; | |
1820 | } | |
4c93fbb0 DM |
1821 | if (reset_errno && skb_cloned(skb)) |
1822 | skb = skb_copy(skb, GFP_KERNEL); | |
1823 | else | |
1824 | skb = skb_clone(skb, GFP_KERNEL); | |
1825 | ||
1826 | if (reset_errno && skb) { | |
1827 | struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data; | |
1828 | new_hdr->sadb_msg_errno = 0; | |
1829 | } | |
1830 | ||
1831 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk)); | |
1da177e4 LT |
1832 | return 0; |
1833 | } | |
1834 | ||
1835 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1836 | { | |
1837 | int i; | |
1838 | u32 reqid = *(u32*)ptr; | |
1839 | ||
1840 | for (i=0; i<xp->xfrm_nr; i++) { | |
1841 | if (xp->xfrm_vec[i].reqid == reqid) | |
1842 | return -EEXIST; | |
1843 | } | |
1844 | return 0; | |
1845 | } | |
1846 | ||
07fb0f17 | 1847 | static u32 gen_reqid(struct net *net) |
1da177e4 | 1848 | { |
4c563f76 | 1849 | struct xfrm_policy_walk walk; |
1da177e4 | 1850 | u32 start; |
4c563f76 | 1851 | int rc; |
1da177e4 LT |
1852 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1853 | ||
1854 | start = reqid; | |
1855 | do { | |
1856 | ++reqid; | |
1857 | if (reqid == 0) | |
1858 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 | 1859 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f17 | 1860 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
4c563f76 TT |
1861 | xfrm_policy_walk_done(&walk); |
1862 | if (rc != -EEXIST) | |
1da177e4 LT |
1863 | return reqid; |
1864 | } while (reqid != start); | |
1865 | return 0; | |
1866 | } | |
1867 | ||
1868 | static int | |
1869 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1870 | { | |
07fb0f17 | 1871 | struct net *net = xp_net(xp); |
1da177e4 | 1872 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce2 | 1873 | int mode; |
1da177e4 LT |
1874 | |
1875 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1876 | return -ELOOP; | |
1877 | ||
1878 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1879 | return -EINVAL; | |
1880 | ||
1881 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1882 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1883 | return -EINVAL; | |
1884 | t->mode = mode; | |
1da177e4 LT |
1885 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1886 | t->optional = 1; | |
1887 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1888 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1889 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1890 | t->reqid = 0; | |
07fb0f17 | 1891 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4 LT |
1892 | return -ENOBUFS; |
1893 | } | |
1894 | ||
1895 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1896 | if (t->mode == XFRM_MODE_TUNNEL) { |
5f95ac91 YH |
1897 | u8 *sa = (u8 *) (rq + 1); |
1898 | int family, socklen; | |
1899 | ||
1900 | family = pfkey_sockaddr_extract((struct sockaddr *)sa, | |
1901 | &t->saddr); | |
1902 | if (!family) | |
1da177e4 | 1903 | return -EINVAL; |
5f95ac91 YH |
1904 | |
1905 | socklen = pfkey_sockaddr_len(family); | |
1906 | if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), | |
1907 | &t->id.daddr) != family) | |
1908 | return -EINVAL; | |
1909 | t->encap_family = family; | |
2718aa7c MK |
1910 | } else |
1911 | t->encap_family = xp->family; | |
1912 | ||
1da177e4 | 1913 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1914 | t->allalgs = 1; |
1da177e4 LT |
1915 | xp->xfrm_nr++; |
1916 | return 0; | |
1917 | } | |
1918 | ||
1919 | static int | |
1920 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1921 | { | |
1922 | int err; | |
1923 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1924 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1925 | ||
1926 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { | |
1927 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1928 | return err; | |
1929 | len -= rq->sadb_x_ipsecrequest_len; | |
1930 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1931 | } | |
1932 | return 0; | |
1933 | } | |
1934 | ||
4c93fbb0 | 1935 | static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp) |
df71837d TJ |
1936 | { |
1937 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1938 | ||
1939 | if (xfrm_ctx) { | |
1940 | int len = sizeof(struct sadb_x_sec_ctx); | |
1941 | len += xfrm_ctx->ctx_len; | |
1942 | return PFKEY_ALIGN8(len); | |
1943 | } | |
1944 | return 0; | |
1945 | } | |
1946 | ||
4c93fbb0 | 1947 | static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp) |
1da177e4 | 1948 | { |
4c93fbb0 | 1949 | const struct xfrm_tmpl *t; |
1da177e4 | 1950 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
1951 | int socklen = 0; |
1952 | int i; | |
1953 | ||
1954 | for (i=0; i<xp->xfrm_nr; i++) { | |
1955 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 1956 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 1957 | } |
1da177e4 LT |
1958 | |
1959 | return sizeof(struct sadb_msg) + | |
1960 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 1961 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
1962 | (sockaddr_size * 2) + |
1963 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
1964 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1965 | (socklen * 2) + | |
df71837d | 1966 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
1967 | } |
1968 | ||
4c93fbb0 | 1969 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp) |
1da177e4 LT |
1970 | { |
1971 | struct sk_buff *skb; | |
1972 | int size; | |
1973 | ||
1974 | size = pfkey_xfrm_policy2msg_size(xp); | |
1975 | ||
1976 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
1977 | if (skb == NULL) | |
1978 | return ERR_PTR(-ENOBUFS); | |
1979 | ||
1980 | return skb; | |
1981 | } | |
1982 | ||
4c93fbb0 | 1983 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir) |
1da177e4 LT |
1984 | { |
1985 | struct sadb_msg *hdr; | |
1986 | struct sadb_address *addr; | |
1987 | struct sadb_lifetime *lifetime; | |
1988 | struct sadb_x_policy *pol; | |
df71837d TJ |
1989 | struct sadb_x_sec_ctx *sec_ctx; |
1990 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
1991 | int i; |
1992 | int size; | |
1993 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 1994 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
1995 | |
1996 | size = pfkey_xfrm_policy2msg_size(xp); | |
1997 | ||
1998 | /* call should fill header later */ | |
1999 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
2000 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
2001 | ||
2002 | /* src address */ | |
8ff24541 | 2003 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 2004 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 2005 | addr->sadb_address_len = |
1da177e4 LT |
2006 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2007 | sizeof(uint64_t); | |
2008 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2009 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
2010 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
2011 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2012 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2013 | xp->selector.sport, | |
2014 | (struct sockaddr *) (addr + 1), | |
2015 | xp->family)) | |
1da177e4 LT |
2016 | BUG(); |
2017 | ||
2018 | /* dst address */ | |
8ff24541 | 2019 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
2020 | sizeof(struct sadb_address)+sockaddr_size); |
2021 | addr->sadb_address_len = | |
2022 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2023 | sizeof(uint64_t); | |
2024 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2025 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2026 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2027 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2028 | |
2029 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2030 | (struct sockaddr *) (addr + 1), | |
2031 | xp->family); | |
1da177e4 LT |
2032 | |
2033 | /* hard time */ | |
8ff24541 | 2034 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2035 | sizeof(struct sadb_lifetime)); |
2036 | lifetime->sadb_lifetime_len = | |
2037 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2038 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2039 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2040 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2041 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2042 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2043 | /* soft time */ | |
8ff24541 | 2044 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2045 | sizeof(struct sadb_lifetime)); |
2046 | lifetime->sadb_lifetime_len = | |
2047 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2048 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2049 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2050 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2051 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2052 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2053 | /* current time */ | |
8ff24541 | 2054 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2055 | sizeof(struct sadb_lifetime)); |
2056 | lifetime->sadb_lifetime_len = | |
2057 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2058 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2059 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2060 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2061 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2062 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2063 | ||
2064 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2065 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2066 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2067 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2068 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2069 | if (xp->xfrm_nr) | |
2070 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2071 | else | |
2072 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2073 | } | |
2074 | pol->sadb_x_policy_dir = dir+1; | |
2075 | pol->sadb_x_policy_id = xp->index; | |
2076 | pol->sadb_x_policy_priority = xp->priority; | |
2077 | ||
2078 | for (i=0; i<xp->xfrm_nr; i++) { | |
4c93fbb0 | 2079 | const struct xfrm_tmpl *t = xp->xfrm_vec + i; |
1da177e4 | 2080 | struct sadb_x_ipsecrequest *rq; |
1da177e4 | 2081 | int req_size; |
55569ce2 | 2082 | int mode; |
1da177e4 LT |
2083 | |
2084 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2085 | if (t->mode == XFRM_MODE_TUNNEL) { |
2086 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2087 | req_size += socklen * 2; | |
2088 | } else { | |
1da177e4 | 2089 | size -= 2*socklen; |
e5b56652 | 2090 | } |
1da177e4 LT |
2091 | rq = (void*)skb_put(skb, req_size); |
2092 | pol->sadb_x_policy_len += req_size/8; | |
2093 | memset(rq, 0, sizeof(*rq)); | |
2094 | rq->sadb_x_ipsecrequest_len = req_size; | |
2095 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2096 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2097 | return -EINVAL; | |
fefaa75e | 2098 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2099 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2100 | if (t->reqid) | |
2101 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2102 | if (t->optional) | |
2103 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2104 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2105 | |
7e49e6de | 2106 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2107 | u8 *sa = (void *)(rq + 1); |
2108 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2109 | (struct sockaddr *)sa, | |
2110 | t->encap_family); | |
2111 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2112 | (struct sockaddr *) (sa + socklen), | |
2113 | t->encap_family); | |
1da177e4 LT |
2114 | } |
2115 | } | |
df71837d TJ |
2116 | |
2117 | /* security context */ | |
2118 | if ((xfrm_ctx = xp->security)) { | |
2119 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2120 | ||
2121 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2122 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2123 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2124 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2125 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2126 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2127 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2128 | xfrm_ctx->ctx_len); | |
2129 | } | |
2130 | ||
1da177e4 LT |
2131 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2132 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
55569ce2 KM |
2133 | |
2134 | return 0; | |
1da177e4 LT |
2135 | } |
2136 | ||
214e005b | 2137 | static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2138 | { |
2139 | struct sk_buff *out_skb; | |
2140 | struct sadb_msg *out_hdr; | |
2141 | int err; | |
2142 | ||
2143 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
9a127aad DC |
2144 | if (IS_ERR(out_skb)) |
2145 | return PTR_ERR(out_skb); | |
2146 | ||
55569ce2 KM |
2147 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2148 | if (err < 0) | |
2149 | return err; | |
26b15dad JHS |
2150 | |
2151 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2152 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2153 | ||
f60f6b8f | 2154 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2155 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2156 | else | |
2157 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2158 | out_hdr->sadb_msg_errno = 0; | |
2159 | out_hdr->sadb_msg_seq = c->seq; | |
2160 | out_hdr->sadb_msg_pid = c->pid; | |
07fb0f17 | 2161 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad JHS |
2162 | return 0; |
2163 | ||
2164 | } | |
2165 | ||
4c93fbb0 | 2166 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2167 | { |
07fb0f17 | 2168 | struct net *net = sock_net(sk); |
df71837d | 2169 | int err = 0; |
1da177e4 LT |
2170 | struct sadb_lifetime *lifetime; |
2171 | struct sadb_address *sa; | |
2172 | struct sadb_x_policy *pol; | |
2173 | struct xfrm_policy *xp; | |
26b15dad | 2174 | struct km_event c; |
df71837d | 2175 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2176 | |
2177 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2178 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2179 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2180 | return -EINVAL; | |
2181 | ||
2182 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2183 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2184 | return -EINVAL; | |
2185 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2186 | return -EINVAL; | |
2187 | ||
07fb0f17 | 2188 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2189 | if (xp == NULL) |
2190 | return -ENOBUFS; | |
2191 | ||
2192 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2193 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2194 | xp->priority = pol->sadb_x_policy_priority; | |
2195 | ||
8ff24541 | 2196 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2197 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
2198 | if (!xp->family) { | |
2199 | err = -EINVAL; | |
2200 | goto out; | |
2201 | } | |
2202 | xp->selector.family = xp->family; | |
2203 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2204 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2205 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2206 | if (xp->selector.sport) | |
8f83f23e | 2207 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2208 | |
8ff24541 | 2209 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2210 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2211 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2212 | ||
2213 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2214 | * in both addresses. | |
2215 | */ | |
2216 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2217 | ||
2218 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2219 | if (xp->selector.dport) | |
8f83f23e | 2220 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2221 | |
df71837d TJ |
2222 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
2223 | if (sec_ctx != NULL) { | |
2224 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2225 | ||
2226 | if (!uctx) { | |
2227 | err = -ENOBUFS; | |
2228 | goto out; | |
2229 | } | |
2230 | ||
03e1ad7b | 2231 | err = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
2232 | kfree(uctx); |
2233 | ||
2234 | if (err) | |
2235 | goto out; | |
2236 | } | |
2237 | ||
1da177e4 LT |
2238 | xp->lft.soft_byte_limit = XFRM_INF; |
2239 | xp->lft.hard_byte_limit = XFRM_INF; | |
2240 | xp->lft.soft_packet_limit = XFRM_INF; | |
2241 | xp->lft.hard_packet_limit = XFRM_INF; | |
2242 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2243 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2244 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2245 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2246 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2247 | } | |
2248 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2249 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2250 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2251 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2252 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2253 | } | |
2254 | xp->xfrm_nr = 0; | |
2255 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2256 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2257 | goto out; | |
2258 | ||
1da177e4 LT |
2259 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2260 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2261 | |
ab5f5e8b | 2262 | xfrm_audit_policy_add(xp, err ? 0 : 1, |
2532386f EP |
2263 | audit_get_loginuid(current), |
2264 | audit_get_sessionid(current), 0); | |
161a09e7 | 2265 | |
df71837d TJ |
2266 | if (err) |
2267 | goto out; | |
1da177e4 | 2268 | |
26b15dad | 2269 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2270 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2271 | else |
f60f6b8f | 2272 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2273 | |
26b15dad JHS |
2274 | c.seq = hdr->sadb_msg_seq; |
2275 | c.pid = hdr->sadb_msg_pid; | |
1da177e4 | 2276 | |
26b15dad JHS |
2277 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2278 | xfrm_pol_put(xp); | |
1da177e4 LT |
2279 | return 0; |
2280 | ||
2281 | out: | |
12a169e7 | 2282 | xp->walk.dead = 1; |
64c31b3f | 2283 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2284 | return err; |
2285 | } | |
2286 | ||
4c93fbb0 | 2287 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2288 | { |
07fb0f17 | 2289 | struct net *net = sock_net(sk); |
1da177e4 LT |
2290 | int err; |
2291 | struct sadb_address *sa; | |
2292 | struct sadb_x_policy *pol; | |
03e1ad7b | 2293 | struct xfrm_policy *xp; |
1da177e4 | 2294 | struct xfrm_selector sel; |
26b15dad | 2295 | struct km_event c; |
df71837d | 2296 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2297 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2298 | |
2299 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2300 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2301 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2302 | return -EINVAL; | |
2303 | ||
2304 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2305 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2306 | return -EINVAL; | |
2307 | ||
2308 | memset(&sel, 0, sizeof(sel)); | |
2309 | ||
8ff24541 | 2310 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 LT |
2311 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2312 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2313 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2314 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2315 | if (sel.sport) | |
8f83f23e | 2316 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2317 | |
8ff24541 | 2318 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4 LT |
2319 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2320 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2321 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2322 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2323 | if (sel.dport) | |
8f83f23e | 2324 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2325 | |
df71837d | 2326 | sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1]; |
df71837d TJ |
2327 | if (sec_ctx != NULL) { |
2328 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
2329 | ||
2330 | if (!uctx) | |
2331 | return -ENOMEM; | |
2332 | ||
03e1ad7b | 2333 | err = security_xfrm_policy_alloc(&pol_ctx, uctx); |
df71837d | 2334 | kfree(uctx); |
df71837d TJ |
2335 | if (err) |
2336 | return err; | |
2db3e47e | 2337 | } |
161a09e7 | 2338 | |
8ca2e93b | 2339 | xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b PM |
2340 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2341 | 1, &err); | |
2342 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2343 | if (xp == NULL) |
2344 | return -ENOENT; | |
2345 | ||
ab5f5e8b | 2346 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2347 | audit_get_loginuid(current), |
2348 | audit_get_sessionid(current), 0); | |
13fcfbb0 DM |
2349 | |
2350 | if (err) | |
c8c05a8e | 2351 | goto out; |
13fcfbb0 | 2352 | |
26b15dad JHS |
2353 | c.seq = hdr->sadb_msg_seq; |
2354 | c.pid = hdr->sadb_msg_pid; | |
1839faab | 2355 | c.data.byid = 0; |
f60f6b8f | 2356 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2357 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2358 | ||
c8c05a8e | 2359 | out: |
26b15dad JHS |
2360 | xfrm_pol_put(xp); |
2361 | return err; | |
2362 | } | |
2363 | ||
4c93fbb0 | 2364 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir) |
26b15dad JHS |
2365 | { |
2366 | int err; | |
2367 | struct sk_buff *out_skb; | |
2368 | struct sadb_msg *out_hdr; | |
2369 | err = 0; | |
2370 | ||
1da177e4 LT |
2371 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2372 | if (IS_ERR(out_skb)) { | |
2373 | err = PTR_ERR(out_skb); | |
2374 | goto out; | |
2375 | } | |
55569ce2 KM |
2376 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2377 | if (err < 0) | |
2378 | goto out; | |
1da177e4 LT |
2379 | |
2380 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2381 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2382 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2383 | out_hdr->sadb_msg_satype = 0; |
2384 | out_hdr->sadb_msg_errno = 0; | |
2385 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2386 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
07fb0f17 | 2387 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4 LT |
2388 | err = 0; |
2389 | ||
2390 | out: | |
1da177e4 LT |
2391 | return err; |
2392 | } | |
2393 | ||
08de61be SS |
2394 | #ifdef CONFIG_NET_KEY_MIGRATE |
2395 | static int pfkey_sockaddr_pair_size(sa_family_t family) | |
2396 | { | |
9e8b4ed8 | 2397 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2398 | } |
2399 | ||
13c1d189 | 2400 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2401 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2402 | u16 *family) | |
2403 | { | |
5f95ac91 YH |
2404 | int af, socklen; |
2405 | ||
13c1d189 | 2406 | if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2407 | return -EINVAL; |
2408 | ||
13c1d189 | 2409 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2410 | if (!af) |
2411 | return -EINVAL; | |
2412 | ||
2413 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2414 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2415 | daddr) != af) |
08de61be | 2416 | return -EINVAL; |
08de61be | 2417 | |
5f95ac91 | 2418 | *family = af; |
08de61be SS |
2419 | return 0; |
2420 | } | |
2421 | ||
2422 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, | |
2423 | struct xfrm_migrate *m) | |
2424 | { | |
2425 | int err; | |
2426 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2427 | int mode; |
08de61be SS |
2428 | |
2429 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2430 | len < rq1->sadb_x_ipsecrequest_len) | |
2431 | return -EINVAL; | |
2432 | ||
2433 | /* old endoints */ | |
13c1d189 AE |
2434 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
2435 | rq1->sadb_x_ipsecrequest_len, | |
2436 | &m->old_saddr, &m->old_daddr, | |
08de61be SS |
2437 | &m->old_family); |
2438 | if (err) | |
2439 | return err; | |
2440 | ||
2441 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2442 | len -= rq1->sadb_x_ipsecrequest_len; | |
2443 | ||
2444 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2445 | len < rq2->sadb_x_ipsecrequest_len) | |
2446 | return -EINVAL; | |
2447 | ||
2448 | /* new endpoints */ | |
13c1d189 AE |
2449 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
2450 | rq2->sadb_x_ipsecrequest_len, | |
2451 | &m->new_saddr, &m->new_daddr, | |
08de61be SS |
2452 | &m->new_family); |
2453 | if (err) | |
2454 | return err; | |
2455 | ||
2456 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2457 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2458 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2459 | return -EINVAL; | |
2460 | ||
2461 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2462 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2463 | return -EINVAL; | |
2464 | m->mode = mode; | |
08de61be SS |
2465 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2466 | ||
2467 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2468 | rq2->sadb_x_ipsecrequest_len)); | |
2469 | } | |
2470 | ||
2471 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2472 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2473 | { |
2474 | int i, len, ret, err = -EINVAL; | |
2475 | u8 dir; | |
2476 | struct sadb_address *sa; | |
13c1d189 | 2477 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2478 | struct sadb_x_policy *pol; |
2479 | struct sadb_x_ipsecrequest *rq; | |
2480 | struct xfrm_selector sel; | |
2481 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2482 | struct xfrm_kmaddress k; |
08de61be SS |
2483 | |
2484 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2485 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2486 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2487 | err = -EINVAL; | |
2488 | goto out; | |
2489 | } | |
2490 | ||
13c1d189 | 2491 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2492 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2493 | |
2494 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2495 | err = -EINVAL; | |
2496 | goto out; | |
2497 | } | |
2498 | ||
13c1d189 AE |
2499 | if (kma) { |
2500 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2501 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2502 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2503 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2504 | &k.local, &k.remote, &k.family); | |
2505 | if (ret < 0) { | |
2506 | err = ret; | |
2507 | goto out; | |
2508 | } | |
2509 | } | |
2510 | ||
08de61be SS |
2511 | dir = pol->sadb_x_policy_dir - 1; |
2512 | memset(&sel, 0, sizeof(sel)); | |
2513 | ||
2514 | /* set source address info of selector */ | |
2515 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2516 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2517 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2518 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2519 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2520 | if (sel.sport) | |
582ee43d | 2521 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2522 | |
2523 | /* set destination address info of selector */ | |
2524 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], | |
2525 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2526 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2527 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2528 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2529 | if (sel.dport) | |
582ee43d | 2530 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2531 | |
2532 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2533 | ||
2534 | /* extract ipsecrequests */ | |
2535 | i = 0; | |
2536 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2537 | ||
2538 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2539 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2540 | if (ret < 0) { | |
2541 | err = ret; | |
2542 | goto out; | |
2543 | } else { | |
2544 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2545 | len -= ret; | |
2546 | i++; | |
2547 | } | |
2548 | } | |
2549 | ||
2550 | if (!i || len > 0) { | |
2551 | err = -EINVAL; | |
2552 | goto out; | |
2553 | } | |
2554 | ||
13c1d189 AE |
2555 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
2556 | kma ? &k : NULL); | |
08de61be SS |
2557 | |
2558 | out: | |
2559 | return err; | |
2560 | } | |
2561 | #else | |
2562 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
2563 | struct sadb_msg *hdr, void **ext_hdrs) | |
2564 | { | |
2565 | return -ENOPROTOOPT; | |
2566 | } | |
2567 | #endif | |
2568 | ||
2569 | ||
4c93fbb0 | 2570 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2571 | { |
07fb0f17 | 2572 | struct net *net = sock_net(sk); |
77d8d7a6 | 2573 | unsigned int dir; |
215a2dd3 | 2574 | int err = 0, delete; |
1da177e4 LT |
2575 | struct sadb_x_policy *pol; |
2576 | struct xfrm_policy *xp; | |
26b15dad | 2577 | struct km_event c; |
1da177e4 LT |
2578 | |
2579 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2580 | return -EINVAL; | |
2581 | ||
77d8d7a6 HX |
2582 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2583 | if (dir >= XFRM_POLICY_MAX) | |
2584 | return -EINVAL; | |
2585 | ||
215a2dd3 | 2586 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
8ca2e93b | 2587 | xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
bd55775c | 2588 | dir, pol->sadb_x_policy_id, delete, &err); |
1da177e4 LT |
2589 | if (xp == NULL) |
2590 | return -ENOENT; | |
2591 | ||
215a2dd3 | 2592 | if (delete) { |
ab5f5e8b | 2593 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2594 | audit_get_loginuid(current), |
2595 | audit_get_sessionid(current), 0); | |
1da177e4 | 2596 | |
215a2dd3 EP |
2597 | if (err) |
2598 | goto out; | |
2599 | c.seq = hdr->sadb_msg_seq; | |
2600 | c.pid = hdr->sadb_msg_pid; | |
bf08867f | 2601 | c.data.byid = 1; |
f60f6b8f | 2602 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2603 | km_policy_notify(xp, dir, &c); |
26b15dad | 2604 | } else { |
77d8d7a6 | 2605 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2606 | } |
1da177e4 | 2607 | |
215a2dd3 | 2608 | out: |
1da177e4 LT |
2609 | xfrm_pol_put(xp); |
2610 | return err; | |
2611 | } | |
2612 | ||
2613 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2614 | { | |
83321d6b | 2615 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2616 | struct sk_buff *out_skb; |
2617 | struct sadb_msg *out_hdr; | |
55569ce2 | 2618 | int err; |
1da177e4 | 2619 | |
83321d6b TT |
2620 | if (!pfkey_can_dump(&pfk->sk)) |
2621 | return -ENOBUFS; | |
2622 | ||
1da177e4 LT |
2623 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2624 | if (IS_ERR(out_skb)) | |
2625 | return PTR_ERR(out_skb); | |
2626 | ||
55569ce2 KM |
2627 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2628 | if (err < 0) | |
2629 | return err; | |
1da177e4 LT |
2630 | |
2631 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2632 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2633 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2634 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2635 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2636 | out_hdr->sadb_msg_seq = count + 1; |
83321d6b | 2637 | out_hdr->sadb_msg_pid = pfk->dump.msg_pid; |
12a169e7 HX |
2638 | |
2639 | if (pfk->dump.skb) | |
2640 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 2641 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
2642 | pfk->dump.skb = out_skb; |
2643 | ||
1da177e4 LT |
2644 | return 0; |
2645 | } | |
2646 | ||
83321d6b TT |
2647 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2648 | { | |
07fb0f17 AD |
2649 | struct net *net = sock_net(&pfk->sk); |
2650 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); | |
83321d6b TT |
2651 | } |
2652 | ||
2653 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2654 | { | |
2655 | xfrm_policy_walk_done(&pfk->dump.u.policy); | |
2656 | } | |
2657 | ||
4c93fbb0 | 2658 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2659 | { |
83321d6b | 2660 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2661 | |
83321d6b TT |
2662 | if (pfk->dump.dump != NULL) |
2663 | return -EBUSY; | |
1da177e4 | 2664 | |
83321d6b TT |
2665 | pfk->dump.msg_version = hdr->sadb_msg_version; |
2666 | pfk->dump.msg_pid = hdr->sadb_msg_pid; | |
2667 | pfk->dump.dump = pfkey_dump_sp; | |
2668 | pfk->dump.done = pfkey_dump_sp_done; | |
2669 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
2670 | ||
2671 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2672 | } |
2673 | ||
214e005b | 2674 | static int key_notify_policy_flush(const struct km_event *c) |
1da177e4 LT |
2675 | { |
2676 | struct sk_buff *skb_out; | |
26b15dad | 2677 | struct sadb_msg *hdr; |
1da177e4 | 2678 | |
26b15dad | 2679 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2680 | if (!skb_out) |
2681 | return -ENOBUFS; | |
26b15dad | 2682 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2683 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad JHS |
2684 | hdr->sadb_msg_seq = c->seq; |
2685 | hdr->sadb_msg_pid = c->pid; | |
2686 | hdr->sadb_msg_version = PF_KEY_V2; | |
2687 | hdr->sadb_msg_errno = (uint8_t) 0; | |
2688 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
07fb0f17 | 2689 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad | 2690 | return 0; |
1da177e4 | 2691 | |
26b15dad JHS |
2692 | } |
2693 | ||
4c93fbb0 | 2694 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
26b15dad | 2695 | { |
07fb0f17 | 2696 | struct net *net = sock_net(sk); |
26b15dad | 2697 | struct km_event c; |
161a09e7 | 2698 | struct xfrm_audit audit_info; |
8be987d7 | 2699 | int err, err2; |
1da177e4 | 2700 | |
0c11b942 | 2701 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 2702 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 2703 | audit_info.secid = 0; |
07fb0f17 | 2704 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info); |
8be987d7 | 2705 | err2 = unicast_flush_resp(sk, hdr); |
2f1eb65f JHS |
2706 | if (err || err2) { |
2707 | if (err == -ESRCH) /* empty table - old silent behavior */ | |
2708 | return 0; | |
2709 | return err; | |
2710 | } | |
8be987d7 | 2711 | |
f7b6983f | 2712 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2713 | c.event = XFRM_MSG_FLUSHPOLICY; |
26b15dad JHS |
2714 | c.pid = hdr->sadb_msg_pid; |
2715 | c.seq = hdr->sadb_msg_seq; | |
07fb0f17 | 2716 | c.net = net; |
26b15dad | 2717 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
2718 | |
2719 | return 0; | |
2720 | } | |
2721 | ||
2722 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2723 | const struct sadb_msg *hdr, void * const *ext_hdrs); |
1da177e4 LT |
2724 | static pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
2725 | [SADB_RESERVED] = pfkey_reserved, | |
2726 | [SADB_GETSPI] = pfkey_getspi, | |
2727 | [SADB_UPDATE] = pfkey_add, | |
2728 | [SADB_ADD] = pfkey_add, | |
2729 | [SADB_DELETE] = pfkey_delete, | |
2730 | [SADB_GET] = pfkey_get, | |
2731 | [SADB_ACQUIRE] = pfkey_acquire, | |
2732 | [SADB_REGISTER] = pfkey_register, | |
2733 | [SADB_EXPIRE] = NULL, | |
2734 | [SADB_FLUSH] = pfkey_flush, | |
2735 | [SADB_DUMP] = pfkey_dump, | |
2736 | [SADB_X_PROMISC] = pfkey_promisc, | |
2737 | [SADB_X_PCHANGE] = NULL, | |
2738 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2739 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2740 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2741 | [SADB_X_SPDGET] = pfkey_spdget, | |
2742 | [SADB_X_SPDACQUIRE] = NULL, | |
2743 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2744 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2745 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2746 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2747 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2748 | }; |
2749 | ||
4c93fbb0 | 2750 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr) |
1da177e4 LT |
2751 | { |
2752 | void *ext_hdrs[SADB_EXT_MAX]; | |
2753 | int err; | |
2754 | ||
2755 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
07fb0f17 | 2756 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
1da177e4 LT |
2757 | |
2758 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2759 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2760 | if (!err) { | |
2761 | err = -EOPNOTSUPP; | |
2762 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2763 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2764 | } | |
2765 | return err; | |
2766 | } | |
2767 | ||
2768 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2769 | { | |
2770 | struct sadb_msg *hdr = NULL; | |
2771 | ||
2772 | if (skb->len < sizeof(*hdr)) { | |
2773 | *errp = -EMSGSIZE; | |
2774 | } else { | |
2775 | hdr = (struct sadb_msg *) skb->data; | |
2776 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2777 | hdr->sadb_msg_reserved != 0 || | |
2778 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2779 | hdr->sadb_msg_type > SADB_MAX)) { | |
2780 | hdr = NULL; | |
2781 | *errp = -EINVAL; | |
2782 | } else if (hdr->sadb_msg_len != (skb->len / | |
2783 | sizeof(uint64_t)) || | |
2784 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2785 | sizeof(uint64_t))) { | |
2786 | hdr = NULL; | |
2787 | *errp = -EMSGSIZE; | |
2788 | } else { | |
2789 | *errp = 0; | |
2790 | } | |
2791 | } | |
2792 | return hdr; | |
2793 | } | |
2794 | ||
4c93fbb0 DM |
2795 | static inline int aalg_tmpl_set(const struct xfrm_tmpl *t, |
2796 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2797 | { |
f398035f HX |
2798 | unsigned int id = d->desc.sadb_alg_id; |
2799 | ||
2800 | if (id >= sizeof(t->aalgos) * 8) | |
2801 | return 0; | |
2802 | ||
2803 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2804 | } |
2805 | ||
4c93fbb0 DM |
2806 | static inline int ealg_tmpl_set(const struct xfrm_tmpl *t, |
2807 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2808 | { |
f398035f HX |
2809 | unsigned int id = d->desc.sadb_alg_id; |
2810 | ||
2811 | if (id >= sizeof(t->ealgos) * 8) | |
2812 | return 0; | |
2813 | ||
2814 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2815 | } |
2816 | ||
4c93fbb0 | 2817 | static int count_ah_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2818 | { |
2819 | int i, sz = 0; | |
2820 | ||
2821 | for (i = 0; ; i++) { | |
4c93fbb0 | 2822 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2823 | if (!aalg) |
2824 | break; | |
2825 | if (aalg_tmpl_set(t, aalg) && aalg->available) | |
2826 | sz += sizeof(struct sadb_comb); | |
2827 | } | |
2828 | return sz + sizeof(struct sadb_prop); | |
2829 | } | |
2830 | ||
4c93fbb0 | 2831 | static int count_esp_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2832 | { |
2833 | int i, k, sz = 0; | |
2834 | ||
2835 | for (i = 0; ; i++) { | |
4c93fbb0 | 2836 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2837 | if (!ealg) |
2838 | break; | |
8ff24541 | 2839 | |
1da177e4 LT |
2840 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2841 | continue; | |
8ff24541 | 2842 | |
1da177e4 | 2843 | for (k = 1; ; k++) { |
4c93fbb0 | 2844 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2845 | if (!aalg) |
2846 | break; | |
8ff24541 | 2847 | |
1da177e4 LT |
2848 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2849 | sz += sizeof(struct sadb_comb); | |
2850 | } | |
2851 | } | |
2852 | return sz + sizeof(struct sadb_prop); | |
2853 | } | |
2854 | ||
4c93fbb0 | 2855 | static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2856 | { |
2857 | struct sadb_prop *p; | |
2858 | int i; | |
2859 | ||
2860 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2861 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2862 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2863 | p->sadb_prop_replay = 32; | |
2864 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2865 | ||
2866 | for (i = 0; ; i++) { | |
4c93fbb0 | 2867 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2868 | if (!aalg) |
2869 | break; | |
2870 | ||
2871 | if (aalg_tmpl_set(t, aalg) && aalg->available) { | |
2872 | struct sadb_comb *c; | |
2873 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2874 | memset(c, 0, sizeof(*c)); | |
2875 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2876 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2877 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2878 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2879 | c->sadb_comb_hard_addtime = 24*60*60; | |
2880 | c->sadb_comb_soft_addtime = 20*60*60; | |
2881 | c->sadb_comb_hard_usetime = 8*60*60; | |
2882 | c->sadb_comb_soft_usetime = 7*60*60; | |
2883 | } | |
2884 | } | |
2885 | } | |
2886 | ||
4c93fbb0 | 2887 | static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2888 | { |
2889 | struct sadb_prop *p; | |
2890 | int i, k; | |
2891 | ||
2892 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2893 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2894 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2895 | p->sadb_prop_replay = 32; | |
2896 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2897 | ||
2898 | for (i=0; ; i++) { | |
4c93fbb0 | 2899 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2900 | if (!ealg) |
2901 | break; | |
8ff24541 | 2902 | |
1da177e4 LT |
2903 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2904 | continue; | |
8ff24541 | 2905 | |
1da177e4 LT |
2906 | for (k = 1; ; k++) { |
2907 | struct sadb_comb *c; | |
4c93fbb0 | 2908 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2909 | if (!aalg) |
2910 | break; | |
2911 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) | |
2912 | continue; | |
2913 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2914 | memset(c, 0, sizeof(*c)); | |
2915 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2916 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2917 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2918 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2919 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2920 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2921 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2922 | c->sadb_comb_hard_addtime = 24*60*60; | |
2923 | c->sadb_comb_soft_addtime = 20*60*60; | |
2924 | c->sadb_comb_hard_usetime = 8*60*60; | |
2925 | c->sadb_comb_soft_usetime = 7*60*60; | |
2926 | } | |
2927 | } | |
2928 | } | |
2929 | ||
214e005b | 2930 | static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c) |
26b15dad JHS |
2931 | { |
2932 | return 0; | |
2933 | } | |
2934 | ||
214e005b | 2935 | static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2936 | { |
2937 | struct sk_buff *out_skb; | |
2938 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2939 | int hard; |
2940 | int hsc; | |
2941 | ||
bf08867f | 2942 | hard = c->data.hard; |
26b15dad JHS |
2943 | if (hard) |
2944 | hsc = 2; | |
2945 | else | |
2946 | hsc = 1; | |
1da177e4 | 2947 | |
050f009e | 2948 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
2949 | if (IS_ERR(out_skb)) |
2950 | return PTR_ERR(out_skb); | |
2951 | ||
2952 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2953 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2954 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
2955 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
2956 | out_hdr->sadb_msg_errno = 0; | |
2957 | out_hdr->sadb_msg_reserved = 0; | |
2958 | out_hdr->sadb_msg_seq = 0; | |
2959 | out_hdr->sadb_msg_pid = 0; | |
2960 | ||
07fb0f17 | 2961 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
2962 | return 0; |
2963 | } | |
2964 | ||
214e005b | 2965 | static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2966 | { |
07fb0f17 | 2967 | struct net *net = x ? xs_net(x) : c->net; |
3fa87a32 AD |
2968 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
2969 | ||
2970 | if (atomic_read(&net_pfkey->socks_nr) == 0) | |
99c6f60e JHS |
2971 | return 0; |
2972 | ||
26b15dad | 2973 | switch (c->event) { |
f60f6b8f | 2974 | case XFRM_MSG_EXPIRE: |
26b15dad | 2975 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
2976 | case XFRM_MSG_DELSA: |
2977 | case XFRM_MSG_NEWSA: | |
2978 | case XFRM_MSG_UPDSA: | |
26b15dad | 2979 | return key_notify_sa(x, c); |
f60f6b8f | 2980 | case XFRM_MSG_FLUSHSA: |
26b15dad | 2981 | return key_notify_sa_flush(c); |
d51d081d JHS |
2982 | case XFRM_MSG_NEWAE: /* not yet supported */ |
2983 | break; | |
26b15dad | 2984 | default: |
207024b9 | 2985 | pr_err("pfkey: Unknown SA event %d\n", c->event); |
26b15dad JHS |
2986 | break; |
2987 | } | |
2988 | ||
2989 | return 0; | |
2990 | } | |
2991 | ||
214e005b | 2992 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2993 | { |
f7b6983f MN |
2994 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
2995 | return 0; | |
2996 | ||
26b15dad | 2997 | switch (c->event) { |
f60f6b8f | 2998 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 2999 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
3000 | case XFRM_MSG_DELPOLICY: |
3001 | case XFRM_MSG_NEWPOLICY: | |
3002 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 3003 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 3004 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
3005 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
3006 | break; | |
26b15dad JHS |
3007 | return key_notify_policy_flush(c); |
3008 | default: | |
207024b9 | 3009 | pr_err("pfkey: Unknown policy event %d\n", c->event); |
26b15dad JHS |
3010 | break; |
3011 | } | |
3012 | ||
3013 | return 0; | |
3014 | } | |
3015 | ||
1da177e4 LT |
3016 | static u32 get_acqseq(void) |
3017 | { | |
3018 | u32 res; | |
28aecb9d | 3019 | static atomic_t acqseq; |
1da177e4 | 3020 | |
28aecb9d ED |
3021 | do { |
3022 | res = atomic_inc_return(&acqseq); | |
3023 | } while (!res); | |
1da177e4 LT |
3024 | return res; |
3025 | } | |
3026 | ||
3027 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir) | |
3028 | { | |
3029 | struct sk_buff *skb; | |
3030 | struct sadb_msg *hdr; | |
3031 | struct sadb_address *addr; | |
3032 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3033 | int sockaddr_size; |
3034 | int size; | |
4e2ba18e VY |
3035 | struct sadb_x_sec_ctx *sec_ctx; |
3036 | struct xfrm_sec_ctx *xfrm_ctx; | |
3037 | int ctx_size = 0; | |
8ff24541 | 3038 | |
1da177e4 LT |
3039 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3040 | if (!sockaddr_size) | |
3041 | return -EINVAL; | |
3042 | ||
3043 | size = sizeof(struct sadb_msg) + | |
3044 | (sizeof(struct sadb_address) * 2) + | |
3045 | (sockaddr_size * 2) + | |
3046 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3047 | |
1da177e4 LT |
3048 | if (x->id.proto == IPPROTO_AH) |
3049 | size += count_ah_combs(t); | |
3050 | else if (x->id.proto == IPPROTO_ESP) | |
3051 | size += count_esp_combs(t); | |
3052 | ||
4e2ba18e VY |
3053 | if ((xfrm_ctx = x->security)) { |
3054 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3055 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3056 | } | |
3057 | ||
1da177e4 LT |
3058 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3059 | if (skb == NULL) | |
3060 | return -ENOMEM; | |
8ff24541 | 3061 | |
1da177e4 LT |
3062 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3063 | hdr->sadb_msg_version = PF_KEY_V2; | |
3064 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3065 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3066 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3067 | hdr->sadb_msg_errno = 0; | |
3068 | hdr->sadb_msg_reserved = 0; | |
3069 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3070 | hdr->sadb_msg_pid = 0; | |
3071 | ||
3072 | /* src address */ | |
8ff24541 | 3073 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 3074 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 3075 | addr->sadb_address_len = |
1da177e4 LT |
3076 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3077 | sizeof(uint64_t); | |
3078 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3079 | addr->sadb_address_proto = 0; | |
3080 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3081 | addr->sadb_address_prefixlen = |
3082 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3083 | (struct sockaddr *) (addr + 1), | |
3084 | x->props.family); | |
3085 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3086 | BUG(); |
8ff24541 | 3087 | |
1da177e4 | 3088 | /* dst address */ |
8ff24541 | 3089 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
3090 | sizeof(struct sadb_address)+sockaddr_size); |
3091 | addr->sadb_address_len = | |
3092 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3093 | sizeof(uint64_t); | |
3094 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3095 | addr->sadb_address_proto = 0; | |
3096 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3097 | addr->sadb_address_prefixlen = |
3098 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3099 | (struct sockaddr *) (addr + 1), | |
3100 | x->props.family); | |
3101 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3102 | BUG(); |
3103 | ||
3104 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
3105 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
3106 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3107 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3108 | pol->sadb_x_policy_dir = dir+1; | |
3109 | pol->sadb_x_policy_id = xp->index; | |
3110 | ||
3111 | /* Set sadb_comb's. */ | |
3112 | if (x->id.proto == IPPROTO_AH) | |
3113 | dump_ah_combs(skb, t); | |
3114 | else if (x->id.proto == IPPROTO_ESP) | |
3115 | dump_esp_combs(skb, t); | |
3116 | ||
4e2ba18e VY |
3117 | /* security context */ |
3118 | if (xfrm_ctx) { | |
3119 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
3120 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
3121 | sec_ctx->sadb_x_sec_len = | |
3122 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3123 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3124 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3125 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3126 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3127 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3128 | xfrm_ctx->ctx_len); | |
3129 | } | |
3130 | ||
07fb0f17 | 3131 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
3132 | } |
3133 | ||
cb969f07 | 3134 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3135 | u8 *data, int len, int *dir) |
1da177e4 | 3136 | { |
07fb0f17 | 3137 | struct net *net = sock_net(sk); |
1da177e4 LT |
3138 | struct xfrm_policy *xp; |
3139 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3140 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3141 | |
cb969f07 | 3142 | switch (sk->sk_family) { |
1da177e4 LT |
3143 | case AF_INET: |
3144 | if (opt != IP_IPSEC_POLICY) { | |
3145 | *dir = -EOPNOTSUPP; | |
3146 | return NULL; | |
3147 | } | |
3148 | break; | |
3149 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
3150 | case AF_INET6: | |
3151 | if (opt != IPV6_IPSEC_POLICY) { | |
3152 | *dir = -EOPNOTSUPP; | |
3153 | return NULL; | |
3154 | } | |
3155 | break; | |
3156 | #endif | |
3157 | default: | |
3158 | *dir = -EINVAL; | |
3159 | return NULL; | |
3160 | } | |
3161 | ||
3162 | *dir = -EINVAL; | |
3163 | ||
3164 | if (len < sizeof(struct sadb_x_policy) || | |
3165 | pol->sadb_x_policy_len*8 > len || | |
3166 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3167 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3168 | return NULL; | |
3169 | ||
07fb0f17 | 3170 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
3171 | if (xp == NULL) { |
3172 | *dir = -ENOBUFS; | |
3173 | return NULL; | |
3174 | } | |
3175 | ||
3176 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3177 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3178 | ||
3179 | xp->lft.soft_byte_limit = XFRM_INF; | |
3180 | xp->lft.hard_byte_limit = XFRM_INF; | |
3181 | xp->lft.soft_packet_limit = XFRM_INF; | |
3182 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3183 | xp->family = sk->sk_family; |
1da177e4 LT |
3184 | |
3185 | xp->xfrm_nr = 0; | |
3186 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3187 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3188 | goto out; | |
3189 | ||
df71837d TJ |
3190 | /* security context too */ |
3191 | if (len >= (pol->sadb_x_policy_len*8 + | |
3192 | sizeof(struct sadb_x_sec_ctx))) { | |
3193 | char *p = (char *)pol; | |
3194 | struct xfrm_user_sec_ctx *uctx; | |
3195 | ||
3196 | p += pol->sadb_x_policy_len*8; | |
3197 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3198 | if (len < pol->sadb_x_policy_len*8 + | |
cb969f07 VY |
3199 | sec_ctx->sadb_x_sec_len) { |
3200 | *dir = -EINVAL; | |
df71837d | 3201 | goto out; |
cb969f07 | 3202 | } |
df71837d TJ |
3203 | if ((*dir = verify_sec_ctx_len(p))) |
3204 | goto out; | |
3205 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx); | |
03e1ad7b | 3206 | *dir = security_xfrm_policy_alloc(&xp->security, uctx); |
df71837d TJ |
3207 | kfree(uctx); |
3208 | ||
3209 | if (*dir) | |
3210 | goto out; | |
3211 | } | |
3212 | ||
1da177e4 LT |
3213 | *dir = pol->sadb_x_policy_dir-1; |
3214 | return xp; | |
3215 | ||
3216 | out: | |
70e90679 | 3217 | xp->walk.dead = 1; |
64c31b3f | 3218 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3219 | return NULL; |
3220 | } | |
3221 | ||
5d36b180 | 3222 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3223 | { |
3224 | struct sk_buff *skb; | |
3225 | struct sadb_msg *hdr; | |
3226 | struct sadb_sa *sa; | |
3227 | struct sadb_address *addr; | |
3228 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3229 | int sockaddr_size; |
3230 | int size; | |
3231 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3232 | struct xfrm_encap_tmpl *natt = NULL; | |
3233 | ||
3234 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3235 | if (!sockaddr_size) | |
3236 | return -EINVAL; | |
3237 | ||
3238 | if (!satype) | |
3239 | return -EINVAL; | |
3240 | ||
3241 | if (!x->encap) | |
3242 | return -EINVAL; | |
3243 | ||
3244 | natt = x->encap; | |
3245 | ||
3246 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3247 | * | |
3248 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3249 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3250 | */ | |
8ff24541 | 3251 | |
1da177e4 LT |
3252 | size = sizeof(struct sadb_msg) + |
3253 | sizeof(struct sadb_sa) + | |
3254 | (sizeof(struct sadb_address) * 2) + | |
3255 | (sockaddr_size * 2) + | |
3256 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3257 | |
1da177e4 LT |
3258 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3259 | if (skb == NULL) | |
3260 | return -ENOMEM; | |
8ff24541 | 3261 | |
1da177e4 LT |
3262 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3263 | hdr->sadb_msg_version = PF_KEY_V2; | |
3264 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3265 | hdr->sadb_msg_satype = satype; | |
3266 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3267 | hdr->sadb_msg_errno = 0; | |
3268 | hdr->sadb_msg_reserved = 0; | |
3269 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3270 | hdr->sadb_msg_pid = 0; | |
3271 | ||
3272 | /* SA */ | |
3273 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
3274 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
3275 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3276 | sa->sadb_sa_spi = x->id.spi; | |
3277 | sa->sadb_sa_replay = 0; | |
3278 | sa->sadb_sa_state = 0; | |
3279 | sa->sadb_sa_auth = 0; | |
3280 | sa->sadb_sa_encrypt = 0; | |
3281 | sa->sadb_sa_flags = 0; | |
3282 | ||
3283 | /* ADDRESS_SRC (old addr) */ | |
3284 | addr = (struct sadb_address*) | |
3285 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3286 | addr->sadb_address_len = |
1da177e4 LT |
3287 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3288 | sizeof(uint64_t); | |
3289 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3290 | addr->sadb_address_proto = 0; | |
3291 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3292 | addr->sadb_address_prefixlen = |
3293 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3294 | (struct sockaddr *) (addr + 1), | |
3295 | x->props.family); | |
3296 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3297 | BUG(); |
3298 | ||
3299 | /* NAT_T_SPORT (old port) */ | |
3300 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3301 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3302 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3303 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3304 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3305 | ||
3306 | /* ADDRESS_DST (new addr) */ | |
3307 | addr = (struct sadb_address*) | |
3308 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3309 | addr->sadb_address_len = |
1da177e4 LT |
3310 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3311 | sizeof(uint64_t); | |
3312 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3313 | addr->sadb_address_proto = 0; | |
3314 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3315 | addr->sadb_address_prefixlen = |
3316 | pfkey_sockaddr_fill(ipaddr, 0, | |
3317 | (struct sockaddr *) (addr + 1), | |
3318 | x->props.family); | |
3319 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3320 | BUG(); |
3321 | ||
3322 | /* NAT_T_DPORT (new port) */ | |
3323 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3324 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3325 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3326 | n_port->sadb_x_nat_t_port_port = sport; | |
3327 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3328 | ||
07fb0f17 | 3329 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
3330 | } |
3331 | ||
08de61be SS |
3332 | #ifdef CONFIG_NET_KEY_MIGRATE |
3333 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
183cad12 | 3334 | const struct xfrm_selector *sel) |
08de61be SS |
3335 | { |
3336 | struct sadb_address *addr; | |
08de61be SS |
3337 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); |
3338 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; | |
3339 | addr->sadb_address_exttype = type; | |
3340 | addr->sadb_address_proto = sel->proto; | |
3341 | addr->sadb_address_reserved = 0; | |
3342 | ||
3343 | switch (type) { | |
3344 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3345 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3346 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3347 | (struct sockaddr *)(addr + 1), | |
3348 | sel->family); | |
08de61be SS |
3349 | break; |
3350 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3351 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3352 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3353 | (struct sockaddr *)(addr + 1), | |
3354 | sel->family); | |
08de61be SS |
3355 | break; |
3356 | default: | |
3357 | return -EINVAL; | |
3358 | } | |
3359 | ||
3360 | return 0; | |
3361 | } | |
3362 | ||
13c1d189 | 3363 | |
183cad12 | 3364 | static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k) |
13c1d189 AE |
3365 | { |
3366 | struct sadb_x_kmaddress *kma; | |
3367 | u8 *sa; | |
3368 | int family = k->family; | |
3369 | int socklen = pfkey_sockaddr_len(family); | |
3370 | int size_req; | |
3371 | ||
3372 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3373 | pfkey_sockaddr_pair_size(family)); | |
3374 | ||
3375 | kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req); | |
3376 | memset(kma, 0, size_req); | |
3377 | kma->sadb_x_kmaddress_len = size_req / 8; | |
3378 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3379 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3380 | ||
3381 | sa = (u8 *)(kma + 1); | |
3382 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3383 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3384 | return -EINVAL; | |
3385 | ||
3386 | return 0; | |
3387 | } | |
3388 | ||
08de61be SS |
3389 | static int set_ipsecrequest(struct sk_buff *skb, |
3390 | uint8_t proto, uint8_t mode, int level, | |
3391 | uint32_t reqid, uint8_t family, | |
183cad12 | 3392 | const xfrm_address_t *src, const xfrm_address_t *dst) |
08de61be SS |
3393 | { |
3394 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3395 | u8 *sa; |
3396 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3397 | int size_req; |
3398 | ||
3399 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3400 | pfkey_sockaddr_pair_size(family); | |
3401 | ||
3402 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); | |
3403 | memset(rq, 0, size_req); | |
3404 | rq->sadb_x_ipsecrequest_len = size_req; | |
3405 | rq->sadb_x_ipsecrequest_proto = proto; | |
3406 | rq->sadb_x_ipsecrequest_mode = mode; | |
3407 | rq->sadb_x_ipsecrequest_level = level; | |
3408 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3409 | ||
e5b56652 YH |
3410 | sa = (u8 *) (rq + 1); |
3411 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3412 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3413 | return -EINVAL; |
08de61be SS |
3414 | |
3415 | return 0; | |
3416 | } | |
3417 | #endif | |
3418 | ||
3419 | #ifdef CONFIG_NET_KEY_MIGRATE | |
183cad12 DM |
3420 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3421 | const struct xfrm_migrate *m, int num_bundles, | |
3422 | const struct xfrm_kmaddress *k) | |
08de61be SS |
3423 | { |
3424 | int i; | |
3425 | int sasize_sel; | |
3426 | int size = 0; | |
3427 | int size_pol = 0; | |
3428 | struct sk_buff *skb; | |
3429 | struct sadb_msg *hdr; | |
3430 | struct sadb_x_policy *pol; | |
183cad12 | 3431 | const struct xfrm_migrate *mp; |
08de61be SS |
3432 | |
3433 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3434 | return 0; | |
3435 | ||
3436 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3437 | return -EINVAL; | |
3438 | ||
13c1d189 AE |
3439 | if (k != NULL) { |
3440 | /* addresses for KM */ | |
3441 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3442 | pfkey_sockaddr_pair_size(k->family)); | |
3443 | } | |
3444 | ||
08de61be SS |
3445 | /* selector */ |
3446 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3447 | if (!sasize_sel) | |
3448 | return -EINVAL; | |
3449 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3450 | ||
3451 | /* policy info */ | |
3452 | size_pol += sizeof(struct sadb_x_policy); | |
3453 | ||
3454 | /* ipsecrequests */ | |
3455 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3456 | /* old locator pair */ | |
3457 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3458 | pfkey_sockaddr_pair_size(mp->old_family); | |
3459 | /* new locator pair */ | |
3460 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3461 | pfkey_sockaddr_pair_size(mp->new_family); | |
3462 | } | |
3463 | ||
3464 | size += sizeof(struct sadb_msg) + size_pol; | |
3465 | ||
3466 | /* alloc buffer */ | |
3467 | skb = alloc_skb(size, GFP_ATOMIC); | |
3468 | if (skb == NULL) | |
3469 | return -ENOMEM; | |
3470 | ||
3471 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); | |
3472 | hdr->sadb_msg_version = PF_KEY_V2; | |
3473 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3474 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3475 | hdr->sadb_msg_len = size / 8; | |
3476 | hdr->sadb_msg_errno = 0; | |
3477 | hdr->sadb_msg_reserved = 0; | |
3478 | hdr->sadb_msg_seq = 0; | |
3479 | hdr->sadb_msg_pid = 0; | |
3480 | ||
13c1d189 AE |
3481 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3482 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
3483 | return -EINVAL; | |
3484 | ||
08de61be SS |
3485 | /* selector src */ |
3486 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3487 | ||
3488 | /* selector dst */ | |
3489 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3490 | ||
3491 | /* policy information */ | |
3492 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); | |
3493 | pol->sadb_x_policy_len = size_pol / 8; | |
3494 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3495 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3496 | pol->sadb_x_policy_dir = dir + 1; | |
3497 | pol->sadb_x_policy_id = 0; | |
3498 | pol->sadb_x_policy_priority = 0; | |
3499 | ||
3500 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3501 | /* old ipsecrequest */ | |
55569ce2 KM |
3502 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3503 | if (mode < 0) | |
d4782c32 | 3504 | goto err; |
55569ce2 | 3505 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3506 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3507 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3508 | &mp->old_saddr, &mp->old_daddr) < 0) |
3509 | goto err; | |
08de61be SS |
3510 | |
3511 | /* new ipsecrequest */ | |
55569ce2 | 3512 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3513 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3514 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3515 | &mp->new_saddr, &mp->new_daddr) < 0) |
3516 | goto err; | |
08de61be SS |
3517 | } |
3518 | ||
3519 | /* broadcast migrate message to sockets */ | |
07fb0f17 | 3520 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61be SS |
3521 | |
3522 | return 0; | |
d4782c32 PM |
3523 | |
3524 | err: | |
3525 | kfree_skb(skb); | |
3526 | return -EINVAL; | |
08de61be SS |
3527 | } |
3528 | #else | |
183cad12 DM |
3529 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3530 | const struct xfrm_migrate *m, int num_bundles, | |
3531 | const struct xfrm_kmaddress *k) | |
08de61be SS |
3532 | { |
3533 | return -ENOPROTOOPT; | |
3534 | } | |
3535 | #endif | |
3536 | ||
1da177e4 LT |
3537 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3538 | struct socket *sock, struct msghdr *msg, size_t len) | |
3539 | { | |
3540 | struct sock *sk = sock->sk; | |
3541 | struct sk_buff *skb = NULL; | |
3542 | struct sadb_msg *hdr = NULL; | |
3543 | int err; | |
3544 | ||
3545 | err = -EOPNOTSUPP; | |
3546 | if (msg->msg_flags & MSG_OOB) | |
3547 | goto out; | |
3548 | ||
3549 | err = -EMSGSIZE; | |
3550 | if ((unsigned)len > sk->sk_sndbuf - 32) | |
3551 | goto out; | |
3552 | ||
3553 | err = -ENOBUFS; | |
3554 | skb = alloc_skb(len, GFP_KERNEL); | |
3555 | if (skb == NULL) | |
3556 | goto out; | |
3557 | ||
3558 | err = -EFAULT; | |
3559 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3560 | goto out; | |
3561 | ||
3562 | hdr = pfkey_get_base_msg(skb, &err); | |
3563 | if (!hdr) | |
3564 | goto out; | |
3565 | ||
4a3e2f71 | 3566 | mutex_lock(&xfrm_cfg_mutex); |
1da177e4 | 3567 | err = pfkey_process(sk, skb, hdr); |
4a3e2f71 | 3568 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 LT |
3569 | |
3570 | out: | |
3571 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3572 | err = 0; | |
6f961068 | 3573 | kfree_skb(skb); |
1da177e4 LT |
3574 | |
3575 | return err ? : len; | |
3576 | } | |
3577 | ||
3578 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3579 | struct socket *sock, struct msghdr *msg, size_t len, | |
3580 | int flags) | |
3581 | { | |
3582 | struct sock *sk = sock->sk; | |
83321d6b | 3583 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3584 | struct sk_buff *skb; |
3585 | int copied, err; | |
3586 | ||
3587 | err = -EINVAL; | |
3588 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3589 | goto out; | |
3590 | ||
3591 | msg->msg_namelen = 0; | |
3592 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); | |
3593 | if (skb == NULL) | |
3594 | goto out; | |
3595 | ||
3596 | copied = skb->len; | |
3597 | if (copied > len) { | |
3598 | msg->msg_flags |= MSG_TRUNC; | |
3599 | copied = len; | |
3600 | } | |
3601 | ||
badff6d0 | 3602 | skb_reset_transport_header(skb); |
1da177e4 LT |
3603 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3604 | if (err) | |
3605 | goto out_free; | |
3606 | ||
3b885787 | 3607 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
3608 | |
3609 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3610 | ||
83321d6b TT |
3611 | if (pfk->dump.dump != NULL && |
3612 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3613 | pfkey_do_dump(pfk); | |
3614 | ||
1da177e4 LT |
3615 | out_free: |
3616 | skb_free_datagram(sk, skb); | |
3617 | out: | |
3618 | return err; | |
3619 | } | |
3620 | ||
90ddc4f0 | 3621 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3622 | .family = PF_KEY, |
3623 | .owner = THIS_MODULE, | |
3624 | /* Operations that make no sense on pfkey sockets. */ | |
3625 | .bind = sock_no_bind, | |
3626 | .connect = sock_no_connect, | |
3627 | .socketpair = sock_no_socketpair, | |
3628 | .accept = sock_no_accept, | |
3629 | .getname = sock_no_getname, | |
3630 | .ioctl = sock_no_ioctl, | |
3631 | .listen = sock_no_listen, | |
3632 | .shutdown = sock_no_shutdown, | |
3633 | .setsockopt = sock_no_setsockopt, | |
3634 | .getsockopt = sock_no_getsockopt, | |
3635 | .mmap = sock_no_mmap, | |
3636 | .sendpage = sock_no_sendpage, | |
3637 | ||
3638 | /* Now the operations that really occur. */ | |
3639 | .release = pfkey_release, | |
3640 | .poll = datagram_poll, | |
3641 | .sendmsg = pfkey_sendmsg, | |
3642 | .recvmsg = pfkey_recvmsg, | |
3643 | }; | |
3644 | ||
ec1b4cf7 | 3645 | static const struct net_proto_family pfkey_family_ops = { |
1da177e4 LT |
3646 | .family = PF_KEY, |
3647 | .create = pfkey_create, | |
3648 | .owner = THIS_MODULE, | |
3649 | }; | |
3650 | ||
3651 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3652 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3653 | { |
27b5b865 | 3654 | struct sock *s = sk_entry(v); |
1da177e4 | 3655 | |
bd2f7476 PE |
3656 | if (v == SEQ_START_TOKEN) |
3657 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3658 | else | |
3659 | seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n", | |
1da177e4 LT |
3660 | s, |
3661 | atomic_read(&s->sk_refcnt), | |
31e6d363 ED |
3662 | sk_rmem_alloc_get(s), |
3663 | sk_wmem_alloc_get(s), | |
1da177e4 LT |
3664 | sock_i_uid(s), |
3665 | sock_i_ino(s) | |
3666 | ); | |
bd2f7476 PE |
3667 | return 0; |
3668 | } | |
3669 | ||
3670 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
ada440e3 | 3671 | __acquires(rcu) |
bd2f7476 | 3672 | { |
7013ec30 | 3673 | struct net *net = seq_file_net(f); |
3fa87a32 | 3674 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 3675 | |
7f6b9dbd | 3676 | rcu_read_lock(); |
3677 | return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); | |
bd2f7476 PE |
3678 | } |
3679 | ||
3680 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3681 | { | |
7013ec30 | 3682 | struct net *net = seq_file_net(f); |
3fa87a32 AD |
3683 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3684 | ||
7f6b9dbd | 3685 | return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
bd2f7476 | 3686 | } |
1da177e4 | 3687 | |
bd2f7476 | 3688 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
ada440e3 | 3689 | __releases(rcu) |
bd2f7476 | 3690 | { |
7f6b9dbd | 3691 | rcu_read_unlock(); |
bd2f7476 | 3692 | } |
1da177e4 | 3693 | |
98147d52 | 3694 | static const struct seq_operations pfkey_seq_ops = { |
bd2f7476 PE |
3695 | .start = pfkey_seq_start, |
3696 | .next = pfkey_seq_next, | |
3697 | .stop = pfkey_seq_stop, | |
3698 | .show = pfkey_seq_show, | |
3699 | }; | |
1da177e4 | 3700 | |
bd2f7476 PE |
3701 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3702 | { | |
7013ec30 AD |
3703 | return seq_open_net(inode, file, &pfkey_seq_ops, |
3704 | sizeof(struct seq_net_private)); | |
1da177e4 | 3705 | } |
61145aa1 | 3706 | |
5ca1b998 | 3707 | static const struct file_operations pfkey_proc_ops = { |
bd2f7476 PE |
3708 | .open = pfkey_seq_open, |
3709 | .read = seq_read, | |
3710 | .llseek = seq_lseek, | |
7013ec30 | 3711 | .release = seq_release_net, |
bd2f7476 PE |
3712 | }; |
3713 | ||
7013ec30 | 3714 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 | 3715 | { |
bd2f7476 PE |
3716 | struct proc_dir_entry *e; |
3717 | ||
7013ec30 | 3718 | e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops); |
bd2f7476 | 3719 | if (e == NULL) |
61145aa1 | 3720 | return -ENOMEM; |
bd2f7476 | 3721 | |
bd2f7476 | 3722 | return 0; |
61145aa1 PE |
3723 | } |
3724 | ||
2c8c1e72 | 3725 | static void __net_exit pfkey_exit_proc(struct net *net) |
61145aa1 | 3726 | { |
7013ec30 | 3727 | proc_net_remove(net, "pfkey"); |
61145aa1 PE |
3728 | } |
3729 | #else | |
2c8c1e72 | 3730 | static inline int pfkey_init_proc(struct net *net) |
61145aa1 PE |
3731 | { |
3732 | return 0; | |
3733 | } | |
3734 | ||
2c8c1e72 | 3735 | static inline void pfkey_exit_proc(struct net *net) |
61145aa1 PE |
3736 | { |
3737 | } | |
1da177e4 LT |
3738 | #endif |
3739 | ||
3740 | static struct xfrm_mgr pfkeyv2_mgr = | |
3741 | { | |
3742 | .id = "pfkeyv2", | |
3743 | .notify = pfkey_send_notify, | |
3744 | .acquire = pfkey_send_acquire, | |
3745 | .compile_policy = pfkey_compile_policy, | |
3746 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3747 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3748 | .migrate = pfkey_send_migrate, |
1da177e4 LT |
3749 | }; |
3750 | ||
3fa87a32 AD |
3751 | static int __net_init pfkey_net_init(struct net *net) |
3752 | { | |
23c049ca | 3753 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3fa87a32 AD |
3754 | int rv; |
3755 | ||
3fa87a32 AD |
3756 | INIT_HLIST_HEAD(&net_pfkey->table); |
3757 | atomic_set(&net_pfkey->socks_nr, 0); | |
23c049ca | 3758 | |
7013ec30 | 3759 | rv = pfkey_init_proc(net); |
3fa87a32 | 3760 | |
3fa87a32 AD |
3761 | return rv; |
3762 | } | |
3763 | ||
3764 | static void __net_exit pfkey_net_exit(struct net *net) | |
3765 | { | |
3766 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
3767 | ||
7013ec30 | 3768 | pfkey_exit_proc(net); |
3fa87a32 | 3769 | BUG_ON(!hlist_empty(&net_pfkey->table)); |
3fa87a32 AD |
3770 | } |
3771 | ||
3772 | static struct pernet_operations pfkey_net_ops = { | |
3773 | .init = pfkey_net_init, | |
3774 | .exit = pfkey_net_exit, | |
23c049ca EB |
3775 | .id = &pfkey_net_id, |
3776 | .size = sizeof(struct netns_pfkey), | |
3fa87a32 AD |
3777 | }; |
3778 | ||
1da177e4 LT |
3779 | static void __exit ipsec_pfkey_exit(void) |
3780 | { | |
3781 | xfrm_unregister_km(&pfkeyv2_mgr); | |
1da177e4 | 3782 | sock_unregister(PF_KEY); |
180211b8 | 3783 | unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3784 | proto_unregister(&key_proto); |
3785 | } | |
3786 | ||
3787 | static int __init ipsec_pfkey_init(void) | |
3788 | { | |
3789 | int err = proto_register(&key_proto, 0); | |
3790 | ||
3791 | if (err != 0) | |
3792 | goto out; | |
3793 | ||
180211b8 | 3794 | err = register_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3795 | if (err != 0) |
3796 | goto out_unregister_key_proto; | |
180211b8 AD |
3797 | err = sock_register(&pfkey_family_ops); |
3798 | if (err != 0) | |
3799 | goto out_unregister_pernet; | |
1da177e4 LT |
3800 | err = xfrm_register_km(&pfkeyv2_mgr); |
3801 | if (err != 0) | |
7013ec30 | 3802 | goto out_sock_unregister; |
1da177e4 LT |
3803 | out: |
3804 | return err; | |
180211b8 | 3805 | |
1da177e4 | 3806 | out_sock_unregister: |
1da177e4 | 3807 | sock_unregister(PF_KEY); |
180211b8 AD |
3808 | out_unregister_pernet: |
3809 | unregister_pernet_subsys(&pfkey_net_ops); | |
1da177e4 LT |
3810 | out_unregister_key_proto: |
3811 | proto_unregister(&key_proto); | |
3812 | goto out; | |
3813 | } | |
3814 | ||
3815 | module_init(ipsec_pfkey_init); | |
3816 | module_exit(ipsec_pfkey_exit); | |
3817 | MODULE_LICENSE("GPL"); | |
3818 | MODULE_ALIAS_NETPROTO(PF_KEY); |