Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net/key/af_key.c An implementation of PF_KEYv2 sockets. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Maxim Giryaev <gem@asplinux.ru> | |
10 | * David S. Miller <davem@redhat.com> | |
11 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
12 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
13 | * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org> | |
14 | * Derek Atkins <derek@ihtfp.com> | |
15 | */ | |
16 | ||
4fc268d2 | 17 | #include <linux/capability.h> |
1da177e4 LT |
18 | #include <linux/module.h> |
19 | #include <linux/kernel.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/pfkeyv2.h> | |
22 | #include <linux/ipsec.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/rtnetlink.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/in6.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/init.h> | |
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 | 47 | #define DUMMY_MARK 0 |
e473fcb4 | 48 | static const 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; | |
15e47304 | 57 | uint32_t msg_portid; |
83321d6b TT |
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 | ||
df008c91 | 144 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
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) { | |
1da177e4 LT |
206 | skb_set_owner_r(*skb2, sk); |
207 | skb_queue_tail(&sk->sk_receive_queue, *skb2); | |
208 | sk->sk_data_ready(sk, (*skb2)->len); | |
209 | *skb2 = NULL; | |
210 | err = 0; | |
211 | } | |
212 | } | |
213 | sock_put(sk); | |
214 | return err; | |
215 | } | |
216 | ||
217 | /* Send SKB to all pfkey sockets matching selected criteria. */ | |
218 | #define BROADCAST_ALL 0 | |
219 | #define BROADCAST_ONE 1 | |
220 | #define BROADCAST_REGISTERED 2 | |
221 | #define BROADCAST_PROMISC_ONLY 4 | |
dd0fc66f | 222 | static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
07fb0f17 AD |
223 | int broadcast_flags, struct sock *one_sk, |
224 | struct net *net) | |
1da177e4 | 225 | { |
3fa87a32 | 226 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 227 | struct sock *sk; |
1da177e4 LT |
228 | struct sk_buff *skb2 = NULL; |
229 | int err = -ESRCH; | |
230 | ||
231 | /* XXX Do we need something like netlink_overrun? I think | |
232 | * XXX PF_KEY socket apps will not mind current behavior. | |
233 | */ | |
234 | if (!skb) | |
235 | return -ENOMEM; | |
236 | ||
7f6b9dbd | 237 | rcu_read_lock(); |
b67bfe0d | 238 | sk_for_each_rcu(sk, &net_pfkey->table) { |
1da177e4 LT |
239 | struct pfkey_sock *pfk = pfkey_sk(sk); |
240 | int err2; | |
241 | ||
242 | /* Yes, it means that if you are meant to receive this | |
243 | * pfkey message you receive it twice as promiscuous | |
244 | * socket. | |
245 | */ | |
246 | if (pfk->promisc) | |
247 | pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
248 | ||
249 | /* the exact target will be processed later */ | |
250 | if (sk == one_sk) | |
251 | continue; | |
252 | if (broadcast_flags != BROADCAST_ALL) { | |
253 | if (broadcast_flags & BROADCAST_PROMISC_ONLY) | |
254 | continue; | |
255 | if ((broadcast_flags & BROADCAST_REGISTERED) && | |
256 | !pfk->registered) | |
257 | continue; | |
258 | if (broadcast_flags & BROADCAST_ONE) | |
259 | continue; | |
260 | } | |
261 | ||
262 | err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk); | |
263 | ||
264 | /* Error is cleare after succecful sending to at least one | |
265 | * registered KM */ | |
266 | if ((broadcast_flags & BROADCAST_REGISTERED) && err) | |
267 | err = err2; | |
268 | } | |
7f6b9dbd | 269 | rcu_read_unlock(); |
1da177e4 LT |
270 | |
271 | if (one_sk != NULL) | |
272 | err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); | |
273 | ||
6f961068 | 274 | kfree_skb(skb2); |
1da177e4 LT |
275 | kfree_skb(skb); |
276 | return err; | |
277 | } | |
278 | ||
05238204 TT |
279 | static int pfkey_do_dump(struct pfkey_sock *pfk) |
280 | { | |
12a169e7 | 281 | struct sadb_msg *hdr; |
05238204 TT |
282 | int rc; |
283 | ||
284 | rc = pfk->dump.dump(pfk); | |
285 | if (rc == -ENOBUFS) | |
286 | return 0; | |
287 | ||
12a169e7 HX |
288 | if (pfk->dump.skb) { |
289 | if (!pfkey_can_dump(&pfk->sk)) | |
290 | return 0; | |
291 | ||
292 | hdr = (struct sadb_msg *) pfk->dump.skb->data; | |
293 | hdr->sadb_msg_seq = 0; | |
294 | hdr->sadb_msg_errno = rc; | |
295 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 296 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
297 | pfk->dump.skb = NULL; |
298 | } | |
299 | ||
05238204 TT |
300 | pfkey_terminate_dump(pfk); |
301 | return rc; | |
302 | } | |
303 | ||
4c93fbb0 DM |
304 | static inline void pfkey_hdr_dup(struct sadb_msg *new, |
305 | const struct sadb_msg *orig) | |
1da177e4 LT |
306 | { |
307 | *new = *orig; | |
308 | } | |
309 | ||
4c93fbb0 | 310 | static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk) |
1da177e4 LT |
311 | { |
312 | struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL); | |
313 | struct sadb_msg *hdr; | |
314 | ||
315 | if (!skb) | |
316 | return -ENOBUFS; | |
317 | ||
318 | /* Woe be to the platform trying to support PFKEY yet | |
319 | * having normal errnos outside the 1-255 range, inclusive. | |
320 | */ | |
321 | err = -err; | |
322 | if (err == ERESTARTSYS || | |
323 | err == ERESTARTNOHAND || | |
324 | err == ERESTARTNOINTR) | |
325 | err = EINTR; | |
326 | if (err >= 512) | |
327 | err = EINVAL; | |
09a62660 | 328 | BUG_ON(err <= 0 || err >= 256); |
1da177e4 LT |
329 | |
330 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
331 | pfkey_hdr_dup(hdr, orig); | |
332 | hdr->sadb_msg_errno = (uint8_t) err; | |
333 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / | |
334 | sizeof(uint64_t)); | |
335 | ||
07fb0f17 | 336 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
337 | |
338 | return 0; | |
339 | } | |
340 | ||
8603b955 | 341 | static const u8 sadb_ext_min_len[] = { |
1da177e4 LT |
342 | [SADB_EXT_RESERVED] = (u8) 0, |
343 | [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa), | |
344 | [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime), | |
345 | [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime), | |
346 | [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime), | |
347 | [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address), | |
348 | [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address), | |
349 | [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address), | |
350 | [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key), | |
351 | [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key), | |
352 | [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident), | |
353 | [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident), | |
354 | [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens), | |
355 | [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop), | |
356 | [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported), | |
357 | [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported), | |
358 | [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange), | |
359 | [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate), | |
360 | [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy), | |
361 | [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2), | |
362 | [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type), | |
363 | [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
364 | [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port), | |
365 | [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address), | |
df71837d | 366 | [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
13c1d189 | 367 | [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
d2c5f658 | 368 | [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter), |
1da177e4 LT |
369 | }; |
370 | ||
371 | /* Verify sadb_address_{len,prefixlen} against sa_family. */ | |
4c93fbb0 | 372 | static int verify_address_len(const void *p) |
1da177e4 | 373 | { |
4c93fbb0 DM |
374 | const struct sadb_address *sp = p; |
375 | const struct sockaddr *addr = (const struct sockaddr *)(sp + 1); | |
376 | const struct sockaddr_in *sin; | |
dfd56b8b | 377 | #if IS_ENABLED(CONFIG_IPV6) |
4c93fbb0 | 378 | const struct sockaddr_in6 *sin6; |
1da177e4 LT |
379 | #endif |
380 | int len; | |
381 | ||
382 | switch (addr->sa_family) { | |
383 | case AF_INET: | |
356f89e1 | 384 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
1da177e4 LT |
385 | if (sp->sadb_address_len != len || |
386 | sp->sadb_address_prefixlen > 32) | |
387 | return -EINVAL; | |
388 | break; | |
dfd56b8b | 389 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 390 | case AF_INET6: |
356f89e1 | 391 | len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
1da177e4 LT |
392 | if (sp->sadb_address_len != len || |
393 | sp->sadb_address_prefixlen > 128) | |
394 | return -EINVAL; | |
395 | break; | |
396 | #endif | |
397 | default: | |
398 | /* It is user using kernel to keep track of security | |
399 | * associations for another protocol, such as | |
400 | * OSPF/RSVP/RIPV2/MIP. It is user's job to verify | |
401 | * lengths. | |
402 | * | |
403 | * XXX Actually, association/policy database is not yet | |
404 | * XXX able to cope with arbitrary sockaddr families. | |
405 | * XXX When it can, remove this -EINVAL. -DaveM | |
406 | */ | |
407 | return -EINVAL; | |
408 | break; | |
3ff50b79 | 409 | } |
1da177e4 LT |
410 | |
411 | return 0; | |
412 | } | |
413 | ||
4c93fbb0 | 414 | static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx) |
df71837d | 415 | { |
356f89e1 IJ |
416 | return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + |
417 | sec_ctx->sadb_x_ctx_len, | |
418 | sizeof(uint64_t)); | |
df71837d TJ |
419 | } |
420 | ||
4c93fbb0 | 421 | static inline int verify_sec_ctx_len(const void *p) |
df71837d | 422 | { |
4c93fbb0 | 423 | const struct sadb_x_sec_ctx *sec_ctx = p; |
298bb621 | 424 | int len = sec_ctx->sadb_x_ctx_len; |
df71837d | 425 | |
298bb621 | 426 | if (len > PAGE_SIZE) |
df71837d TJ |
427 | return -EINVAL; |
428 | ||
429 | len = pfkey_sec_ctx_len(sec_ctx); | |
430 | ||
431 | if (sec_ctx->sadb_x_sec_len != len) | |
432 | return -EINVAL; | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
87536a81 NA |
437 | static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx, |
438 | gfp_t gfp) | |
df71837d TJ |
439 | { |
440 | struct xfrm_user_sec_ctx *uctx = NULL; | |
441 | int ctx_size = sec_ctx->sadb_x_ctx_len; | |
442 | ||
87536a81 | 443 | uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp); |
df71837d TJ |
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 | |
dfd56b8b | 472 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
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); | |
dfd56b8b | 582 | #if IS_ENABLED(CONFIG_IPV6) |
9e8b4ed8 YH |
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 | 597 | return AF_INET; |
dfd56b8b | 598 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 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 | ||
ea110733 | 624 | 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 */ | |
ea110733 | 633 | addr = 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 | 641 | break; |
dfd56b8b | 642 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 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 | } | |
dfd56b8b | 708 | #if IS_ENABLED(CONFIG_IPV6) |
e5b56652 YH |
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; | |
4e3fd7a0 | 715 | sin6->sin6_addr = *(struct in6_addr *)xaddr->a6; |
e5b56652 YH |
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 */ |
70e94e66 | 765 | if (!xfrm_addr_equal(&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); | |
7e50f84c JK |
819 | sa->sadb_sa_auth = (a && a->pfkey_supported) ? |
820 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
821 | } |
822 | sa->sadb_sa_encrypt = 0; | |
823 | BUG_ON(x->ealg && x->calg); | |
824 | if (x->ealg) { | |
825 | struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); | |
7e50f84c JK |
826 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
827 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
828 | } |
829 | /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ | |
830 | if (x->calg) { | |
831 | struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); | |
7e50f84c JK |
832 | sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? |
833 | a->desc.sadb_alg_id : 0; | |
1da177e4 LT |
834 | } |
835 | ||
836 | sa->sadb_sa_flags = 0; | |
837 | if (x->props.flags & XFRM_STATE_NOECN) | |
838 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN; | |
839 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
840 | sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP; | |
dd87147e HX |
841 | if (x->props.flags & XFRM_STATE_NOPMTUDISC) |
842 | sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; | |
1da177e4 LT |
843 | |
844 | /* hard time */ | |
845 | if (hsc & 2) { | |
8ff24541 | 846 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
847 | sizeof(struct sadb_lifetime)); |
848 | lifetime->sadb_lifetime_len = | |
849 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
850 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
851 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit); | |
852 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit); | |
853 | lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds; | |
854 | lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds; | |
855 | } | |
856 | /* soft time */ | |
857 | if (hsc & 1) { | |
8ff24541 | 858 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
859 | sizeof(struct sadb_lifetime)); |
860 | lifetime->sadb_lifetime_len = | |
861 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
862 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
863 | lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit); | |
864 | lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit); | |
865 | lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds; | |
866 | lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds; | |
867 | } | |
868 | /* current time */ | |
869 | lifetime = (struct sadb_lifetime *) skb_put(skb, | |
870 | sizeof(struct sadb_lifetime)); | |
871 | lifetime->sadb_lifetime_len = | |
872 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
873 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
874 | lifetime->sadb_lifetime_allocations = x->curlft.packets; | |
875 | lifetime->sadb_lifetime_bytes = x->curlft.bytes; | |
876 | lifetime->sadb_lifetime_addtime = x->curlft.add_time; | |
877 | lifetime->sadb_lifetime_usetime = x->curlft.use_time; | |
878 | /* src address */ | |
8ff24541 | 879 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 880 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 881 | addr->sadb_address_len = |
1da177e4 LT |
882 | (sizeof(struct sadb_address)+sockaddr_size)/ |
883 | sizeof(uint64_t); | |
884 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
8ff24541 YH |
885 | /* "if the ports are non-zero, then the sadb_address_proto field, |
886 | normally zero, MUST be filled in with the transport | |
1da177e4 | 887 | protocol's number." - RFC2367 */ |
8ff24541 | 888 | addr->sadb_address_proto = 0; |
1da177e4 | 889 | addr->sadb_address_reserved = 0; |
1da177e4 | 890 | |
e5b56652 YH |
891 | addr->sadb_address_prefixlen = |
892 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
893 | (struct sockaddr *) (addr + 1), | |
894 | x->props.family); | |
895 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
896 | BUG(); |
897 | ||
898 | /* dst address */ | |
8ff24541 | 899 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 900 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 901 | addr->sadb_address_len = |
1da177e4 LT |
902 | (sizeof(struct sadb_address)+sockaddr_size)/ |
903 | sizeof(uint64_t); | |
904 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
8ff24541 | 905 | addr->sadb_address_proto = 0; |
1da177e4 | 906 | addr->sadb_address_reserved = 0; |
1da177e4 | 907 | |
e5b56652 YH |
908 | addr->sadb_address_prefixlen = |
909 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
910 | (struct sockaddr *) (addr + 1), | |
911 | x->props.family); | |
912 | if (!addr->sadb_address_prefixlen) | |
913 | BUG(); | |
1da177e4 | 914 | |
70e94e66 YH |
915 | if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, |
916 | x->props.family)) { | |
e5b56652 YH |
917 | addr = (struct sadb_address*) skb_put(skb, |
918 | sizeof(struct sadb_address)+sockaddr_size); | |
919 | addr->sadb_address_len = | |
920 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
921 | sizeof(uint64_t); | |
922 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY; | |
923 | addr->sadb_address_proto = | |
924 | pfkey_proto_from_xfrm(x->sel.proto); | |
925 | addr->sadb_address_prefixlen = x->sel.prefixlen_s; | |
926 | addr->sadb_address_reserved = 0; | |
1da177e4 | 927 | |
e5b56652 YH |
928 | pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, |
929 | (struct sockaddr *) (addr + 1), | |
930 | x->props.family); | |
1da177e4 | 931 | } |
1da177e4 LT |
932 | |
933 | /* auth key */ | |
934 | if (add_keys && auth_key_size) { | |
8ff24541 | 935 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 LT |
936 | sizeof(struct sadb_key)+auth_key_size); |
937 | key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) / | |
938 | sizeof(uint64_t); | |
939 | key->sadb_key_exttype = SADB_EXT_KEY_AUTH; | |
940 | key->sadb_key_bits = x->aalg->alg_key_len; | |
941 | key->sadb_key_reserved = 0; | |
942 | memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8); | |
943 | } | |
944 | /* encrypt key */ | |
945 | if (add_keys && encrypt_key_size) { | |
8ff24541 | 946 | key = (struct sadb_key *) skb_put(skb, |
1da177e4 | 947 | sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541 | 948 | key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4 LT |
949 | encrypt_key_size) / sizeof(uint64_t); |
950 | key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT; | |
951 | key->sadb_key_bits = x->ealg->alg_key_len; | |
952 | key->sadb_key_reserved = 0; | |
8ff24541 | 953 | memcpy(key + 1, x->ealg->alg_key, |
1da177e4 LT |
954 | (x->ealg->alg_key_len+7)/8); |
955 | } | |
956 | ||
957 | /* sa */ | |
958 | sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2)); | |
959 | sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t); | |
960 | sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2; | |
55569ce2 KM |
961 | if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { |
962 | kfree_skb(skb); | |
963 | return ERR_PTR(-EINVAL); | |
964 | } | |
965 | sa2->sadb_x_sa2_mode = mode; | |
1da177e4 LT |
966 | sa2->sadb_x_sa2_reserved1 = 0; |
967 | sa2->sadb_x_sa2_reserved2 = 0; | |
968 | sa2->sadb_x_sa2_sequence = 0; | |
969 | sa2->sadb_x_sa2_reqid = x->props.reqid; | |
970 | ||
971 | if (natt && natt->encap_type) { | |
972 | struct sadb_x_nat_t_type *n_type; | |
973 | struct sadb_x_nat_t_port *n_port; | |
974 | ||
975 | /* type */ | |
976 | n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type)); | |
977 | n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t); | |
978 | n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; | |
979 | n_type->sadb_x_nat_t_type_type = natt->encap_type; | |
980 | n_type->sadb_x_nat_t_type_reserved[0] = 0; | |
981 | n_type->sadb_x_nat_t_type_reserved[1] = 0; | |
982 | n_type->sadb_x_nat_t_type_reserved[2] = 0; | |
983 | ||
984 | /* source port */ | |
985 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
986 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
987 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
988 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
989 | n_port->sadb_x_nat_t_port_reserved = 0; | |
990 | ||
991 | /* dest port */ | |
992 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
993 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
994 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
995 | n_port->sadb_x_nat_t_port_port = natt->encap_dport; | |
996 | n_port->sadb_x_nat_t_port_reserved = 0; | |
997 | } | |
998 | ||
df71837d TJ |
999 | /* security context */ |
1000 | if (xfrm_ctx) { | |
1001 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
1002 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
1003 | sec_ctx->sadb_x_sec_len = | |
1004 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
1005 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
1006 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
1007 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
1008 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
1009 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
1010 | xfrm_ctx->ctx_len); | |
1011 | } | |
1012 | ||
1da177e4 LT |
1013 | return skb; |
1014 | } | |
1015 | ||
050f009e | 1016 | |
4c93fbb0 | 1017 | static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x) |
050f009e HX |
1018 | { |
1019 | struct sk_buff *skb; | |
1020 | ||
050f009e | 1021 | skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e HX |
1022 | |
1023 | return skb; | |
1024 | } | |
1025 | ||
4c93fbb0 | 1026 | static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x, |
050f009e HX |
1027 | int hsc) |
1028 | { | |
1029 | return __pfkey_xfrm_state2msg(x, 0, hsc); | |
1030 | } | |
1031 | ||
07fb0f17 | 1032 | static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
4c93fbb0 DM |
1033 | const struct sadb_msg *hdr, |
1034 | void * const *ext_hdrs) | |
1da177e4 | 1035 | { |
8ff24541 | 1036 | struct xfrm_state *x; |
4c93fbb0 DM |
1037 | const struct sadb_lifetime *lifetime; |
1038 | const struct sadb_sa *sa; | |
1039 | const struct sadb_key *key; | |
1040 | const struct sadb_x_sec_ctx *sec_ctx; | |
1da177e4 LT |
1041 | uint16_t proto; |
1042 | int err; | |
8ff24541 | 1043 | |
1da177e4 | 1044 | |
ea110733 | 1045 | sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4 LT |
1046 | if (!sa || |
1047 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1048 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1049 | return ERR_PTR(-EINVAL); | |
1050 | if (hdr->sadb_msg_satype == SADB_SATYPE_ESP && | |
1051 | !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]) | |
1052 | return ERR_PTR(-EINVAL); | |
1053 | if (hdr->sadb_msg_satype == SADB_SATYPE_AH && | |
1054 | !ext_hdrs[SADB_EXT_KEY_AUTH-1]) | |
1055 | return ERR_PTR(-EINVAL); | |
1056 | if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] != | |
1057 | !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) | |
1058 | return ERR_PTR(-EINVAL); | |
1059 | ||
1060 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1061 | if (proto == 0) | |
1062 | return ERR_PTR(-EINVAL); | |
1063 | ||
1064 | /* default error is no buffer space */ | |
1065 | err = -ENOBUFS; | |
1066 | ||
1067 | /* RFC2367: | |
1068 | ||
1069 | Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message. | |
1070 | SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not | |
1071 | sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state. | |
1072 | Therefore, the sadb_sa_state field of all submitted SAs MUST be | |
1073 | SADB_SASTATE_MATURE and the kernel MUST return an error if this is | |
1074 | not true. | |
1075 | ||
8ff24541 | 1076 | However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4 LT |
1077 | Hence, we have to _ignore_ sadb_sa_state, which is also reasonable. |
1078 | */ | |
1079 | if (sa->sadb_sa_auth > SADB_AALG_MAX || | |
1080 | (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP && | |
1081 | sa->sadb_sa_encrypt > SADB_X_CALG_MAX) || | |
1082 | sa->sadb_sa_encrypt > SADB_EALG_MAX) | |
1083 | return ERR_PTR(-EINVAL); | |
ea110733 | 1084 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1085 | if (key != NULL && |
1086 | sa->sadb_sa_auth != SADB_X_AALG_NULL && | |
1087 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1088 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1089 | return ERR_PTR(-EINVAL); | |
1090 | key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1091 | if (key != NULL && | |
1092 | sa->sadb_sa_encrypt != SADB_EALG_NULL && | |
1093 | ((key->sadb_key_bits+7) / 8 == 0 || | |
1094 | (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t))) | |
1095 | return ERR_PTR(-EINVAL); | |
1096 | ||
07fb0f17 | 1097 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1098 | if (x == NULL) |
1099 | return ERR_PTR(-ENOBUFS); | |
1100 | ||
1101 | x->id.proto = proto; | |
1102 | x->id.spi = sa->sadb_sa_spi; | |
33fce60d FD |
1103 | x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay, |
1104 | (sizeof(x->replay.bitmap) * 8)); | |
1da177e4 LT |
1105 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN) |
1106 | x->props.flags |= XFRM_STATE_NOECN; | |
1107 | if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP) | |
1108 | x->props.flags |= XFRM_STATE_DECAP_DSCP; | |
dd87147e HX |
1109 | if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) |
1110 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
1da177e4 | 1111 | |
ea110733 | 1112 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1]; |
1da177e4 LT |
1113 | if (lifetime != NULL) { |
1114 | x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1115 | x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1116 | x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1117 | x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1118 | } | |
ea110733 | 1119 | lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1]; |
1da177e4 LT |
1120 | if (lifetime != NULL) { |
1121 | x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
1122 | x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
1123 | x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
1124 | x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
1125 | } | |
df71837d | 1126 | |
ea110733 | 1127 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 1128 | if (sec_ctx != NULL) { |
87536a81 | 1129 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
1130 | |
1131 | if (!uctx) | |
1132 | goto out; | |
1133 | ||
1134 | err = security_xfrm_state_alloc(x, uctx); | |
1135 | kfree(uctx); | |
1136 | ||
1137 | if (err) | |
1138 | goto out; | |
1139 | } | |
1140 | ||
ea110733 | 1141 | key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4 LT |
1142 | if (sa->sadb_sa_auth) { |
1143 | int keysize = 0; | |
1144 | struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); | |
7e50f84c | 1145 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1146 | err = -ENOSYS; |
1147 | goto out; | |
1148 | } | |
1149 | if (key) | |
1150 | keysize = (key->sadb_key_bits + 7) / 8; | |
1151 | x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL); | |
1152 | if (!x->aalg) | |
1153 | goto out; | |
1154 | strcpy(x->aalg->alg_name, a->name); | |
1155 | x->aalg->alg_key_len = 0; | |
1156 | if (key) { | |
1157 | x->aalg->alg_key_len = key->sadb_key_bits; | |
1158 | memcpy(x->aalg->alg_key, key+1, keysize); | |
1159 | } | |
c20a66f4 | 1160 | x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1da177e4 LT |
1161 | x->props.aalgo = sa->sadb_sa_auth; |
1162 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1163 | } | |
1164 | if (sa->sadb_sa_encrypt) { | |
1165 | if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { | |
1166 | struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1167 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1168 | err = -ENOSYS; |
1169 | goto out; | |
1170 | } | |
1171 | x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL); | |
1172 | if (!x->calg) | |
1173 | goto out; | |
1174 | strcpy(x->calg->alg_name, a->name); | |
1175 | x->props.calgo = sa->sadb_sa_encrypt; | |
1176 | } else { | |
1177 | int keysize = 0; | |
1178 | struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); | |
7e50f84c | 1179 | if (!a || !a->pfkey_supported) { |
1da177e4 LT |
1180 | err = -ENOSYS; |
1181 | goto out; | |
1182 | } | |
1183 | key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1]; | |
1184 | if (key) | |
1185 | keysize = (key->sadb_key_bits + 7) / 8; | |
1186 | x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL); | |
1187 | if (!x->ealg) | |
1188 | goto out; | |
1189 | strcpy(x->ealg->alg_name, a->name); | |
1190 | x->ealg->alg_key_len = 0; | |
1191 | if (key) { | |
1192 | x->ealg->alg_key_len = key->sadb_key_bits; | |
1193 | memcpy(x->ealg->alg_key, key+1, keysize); | |
1194 | } | |
1195 | x->props.ealgo = sa->sadb_sa_encrypt; | |
1196 | } | |
1197 | } | |
1198 | /* x->algo.flags = sa->sadb_sa_flags; */ | |
1199 | ||
8ff24541 | 1200 | x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4 | 1201 | &x->props.saddr); |
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; | |
dfd56b8b | 1314 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
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); |
70e94e66 | 1324 | if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) { |
1da177e4 LT |
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 | 1344 | |
776e9dd9 FD |
1345 | err = verify_spi_info(x->id.proto, min_spi, max_spi); |
1346 | if (err) { | |
1347 | xfrm_state_put(x); | |
1348 | return err; | |
1349 | } | |
1350 | ||
658b219e | 1351 | err = xfrm_alloc_spi(x, min_spi, max_spi); |
050f009e | 1352 | resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1353 | |
1354 | if (IS_ERR(resp_skb)) { | |
1355 | xfrm_state_put(x); | |
1356 | return PTR_ERR(resp_skb); | |
1357 | } | |
1358 | ||
1359 | out_hdr = (struct sadb_msg *) resp_skb->data; | |
1360 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
1361 | out_hdr->sadb_msg_type = SADB_GETSPI; | |
1362 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); | |
1363 | out_hdr->sadb_msg_errno = 0; | |
1364 | out_hdr->sadb_msg_reserved = 0; | |
1365 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1366 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
1367 | ||
1368 | xfrm_state_put(x); | |
1369 | ||
07fb0f17 | 1370 | pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4 LT |
1371 | |
1372 | return 0; | |
1373 | } | |
1374 | ||
4c93fbb0 | 1375 | static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1376 | { |
07fb0f17 | 1377 | struct net *net = sock_net(sk); |
1da177e4 LT |
1378 | struct xfrm_state *x; |
1379 | ||
1380 | if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8) | |
1381 | return -EOPNOTSUPP; | |
1382 | ||
1383 | if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0) | |
1384 | return 0; | |
1385 | ||
bd55775c | 1386 | x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4 LT |
1387 | if (x == NULL) |
1388 | return 0; | |
1389 | ||
1390 | spin_lock_bh(&x->lock); | |
5b8ef341 | 1391 | if (x->km.state == XFRM_STATE_ACQ) |
1da177e4 | 1392 | x->km.state = XFRM_STATE_ERROR; |
5b8ef341 | 1393 | |
1da177e4 LT |
1394 | spin_unlock_bh(&x->lock); |
1395 | xfrm_state_put(x); | |
1396 | return 0; | |
1397 | } | |
1398 | ||
26b15dad JHS |
1399 | static inline int event2poltype(int event) |
1400 | { | |
1401 | switch (event) { | |
f60f6b8f | 1402 | case XFRM_MSG_DELPOLICY: |
26b15dad | 1403 | return SADB_X_SPDDELETE; |
f60f6b8f | 1404 | case XFRM_MSG_NEWPOLICY: |
26b15dad | 1405 | return SADB_X_SPDADD; |
f60f6b8f | 1406 | case XFRM_MSG_UPDPOLICY: |
26b15dad | 1407 | return SADB_X_SPDUPDATE; |
f60f6b8f | 1408 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1409 | // return SADB_X_SPDEXPIRE; |
1410 | default: | |
207024b9 | 1411 | pr_err("pfkey: Unknown policy event %d\n", event); |
26b15dad JHS |
1412 | break; |
1413 | } | |
1414 | ||
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | static inline int event2keytype(int event) | |
1419 | { | |
1420 | switch (event) { | |
f60f6b8f | 1421 | case XFRM_MSG_DELSA: |
26b15dad | 1422 | return SADB_DELETE; |
f60f6b8f | 1423 | case XFRM_MSG_NEWSA: |
26b15dad | 1424 | return SADB_ADD; |
f60f6b8f | 1425 | case XFRM_MSG_UPDSA: |
26b15dad | 1426 | return SADB_UPDATE; |
f60f6b8f | 1427 | case XFRM_MSG_EXPIRE: |
26b15dad JHS |
1428 | return SADB_EXPIRE; |
1429 | default: | |
207024b9 | 1430 | pr_err("pfkey: Unknown SA event %d\n", event); |
26b15dad JHS |
1431 | break; |
1432 | } | |
1433 | ||
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | /* ADD/UPD/DEL */ | |
214e005b | 1438 | static int key_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1439 | { |
1440 | struct sk_buff *skb; | |
1441 | struct sadb_msg *hdr; | |
26b15dad | 1442 | |
050f009e | 1443 | skb = pfkey_xfrm_state2msg(x); |
26b15dad JHS |
1444 | |
1445 | if (IS_ERR(skb)) | |
1446 | return PTR_ERR(skb); | |
1447 | ||
1448 | hdr = (struct sadb_msg *) skb->data; | |
1449 | hdr->sadb_msg_version = PF_KEY_V2; | |
1450 | hdr->sadb_msg_type = event2keytype(c->event); | |
1451 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1452 | hdr->sadb_msg_errno = 0; | |
1453 | hdr->sadb_msg_reserved = 0; | |
1454 | hdr->sadb_msg_seq = c->seq; | |
15e47304 | 1455 | hdr->sadb_msg_pid = c->portid; |
26b15dad | 1456 | |
07fb0f17 | 1457 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad JHS |
1458 | |
1459 | return 0; | |
1460 | } | |
1da177e4 | 1461 | |
4c93fbb0 | 1462 | static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1463 | { |
07fb0f17 | 1464 | struct net *net = sock_net(sk); |
1da177e4 LT |
1465 | struct xfrm_state *x; |
1466 | int err; | |
26b15dad | 1467 | struct km_event c; |
1da177e4 | 1468 | |
07fb0f17 | 1469 | x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4 LT |
1470 | if (IS_ERR(x)) |
1471 | return PTR_ERR(x); | |
1472 | ||
26b15dad | 1473 | xfrm_state_hold(x); |
1da177e4 LT |
1474 | if (hdr->sadb_msg_type == SADB_ADD) |
1475 | err = xfrm_state_add(x); | |
1476 | else | |
1477 | err = xfrm_state_update(x); | |
1478 | ||
ab5f5e8b | 1479 | xfrm_audit_state_add(x, err ? 0 : 1, |
2532386f EP |
1480 | audit_get_loginuid(current), |
1481 | audit_get_sessionid(current), 0); | |
161a09e7 | 1482 | |
1da177e4 LT |
1483 | if (err < 0) { |
1484 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 1485 | __xfrm_state_put(x); |
7d6dfe1f | 1486 | goto out; |
1da177e4 LT |
1487 | } |
1488 | ||
26b15dad | 1489 | if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f | 1490 | c.event = XFRM_MSG_NEWSA; |
26b15dad | 1491 | else |
f60f6b8f | 1492 | c.event = XFRM_MSG_UPDSA; |
26b15dad | 1493 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1494 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 1495 | km_state_notify(x, &c); |
7d6dfe1f | 1496 | out: |
26b15dad | 1497 | xfrm_state_put(x); |
26b15dad | 1498 | return err; |
1da177e4 LT |
1499 | } |
1500 | ||
4c93fbb0 | 1501 | static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1502 | { |
07fb0f17 | 1503 | struct net *net = sock_net(sk); |
1da177e4 | 1504 | struct xfrm_state *x; |
26b15dad JHS |
1505 | struct km_event c; |
1506 | int err; | |
1da177e4 LT |
1507 | |
1508 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1509 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1510 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1511 | return -EINVAL; | |
1512 | ||
07fb0f17 | 1513 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1514 | if (x == NULL) |
1515 | return -ESRCH; | |
1516 | ||
c8c05a8e CZ |
1517 | if ((err = security_xfrm_state_delete(x))) |
1518 | goto out; | |
1519 | ||
1da177e4 | 1520 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
1521 | err = -EPERM; |
1522 | goto out; | |
1da177e4 | 1523 | } |
161a09e7 | 1524 | |
26b15dad | 1525 | err = xfrm_state_delete(x); |
161a09e7 | 1526 | |
c8c05a8e CZ |
1527 | if (err < 0) |
1528 | goto out; | |
1da177e4 | 1529 | |
26b15dad | 1530 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1531 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1532 | c.event = XFRM_MSG_DELSA; |
26b15dad | 1533 | km_state_notify(x, &c); |
c8c05a8e | 1534 | out: |
ab5f5e8b | 1535 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
1536 | audit_get_loginuid(current), |
1537 | audit_get_sessionid(current), 0); | |
26b15dad | 1538 | xfrm_state_put(x); |
1da177e4 | 1539 | |
26b15dad | 1540 | return err; |
1da177e4 LT |
1541 | } |
1542 | ||
4c93fbb0 | 1543 | static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1544 | { |
07fb0f17 | 1545 | struct net *net = sock_net(sk); |
1da177e4 LT |
1546 | __u8 proto; |
1547 | struct sk_buff *out_skb; | |
1548 | struct sadb_msg *out_hdr; | |
1549 | struct xfrm_state *x; | |
1550 | ||
1551 | if (!ext_hdrs[SADB_EXT_SA-1] || | |
1552 | !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
1553 | ext_hdrs[SADB_EXT_ADDRESS_DST-1])) | |
1554 | return -EINVAL; | |
1555 | ||
07fb0f17 | 1556 | x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4 LT |
1557 | if (x == NULL) |
1558 | return -ESRCH; | |
1559 | ||
050f009e | 1560 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1561 | proto = x->id.proto; |
1562 | xfrm_state_put(x); | |
1563 | if (IS_ERR(out_skb)) | |
1564 | return PTR_ERR(out_skb); | |
1565 | ||
1566 | out_hdr = (struct sadb_msg *) out_skb->data; | |
1567 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
435000be | 1568 | out_hdr->sadb_msg_type = SADB_GET; |
1da177e4 LT |
1569 | out_hdr->sadb_msg_satype = pfkey_proto2satype(proto); |
1570 | out_hdr->sadb_msg_errno = 0; | |
1571 | out_hdr->sadb_msg_reserved = 0; | |
1572 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
1573 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
07fb0f17 | 1574 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4 LT |
1575 | |
1576 | return 0; | |
1577 | } | |
1578 | ||
4c93fbb0 | 1579 | static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, |
dd0fc66f | 1580 | gfp_t allocation) |
1da177e4 LT |
1581 | { |
1582 | struct sk_buff *skb; | |
1583 | struct sadb_msg *hdr; | |
1584 | int len, auth_len, enc_len, i; | |
1585 | ||
7e50f84c | 1586 | auth_len = xfrm_count_pfkey_auth_supported(); |
1da177e4 LT |
1587 | if (auth_len) { |
1588 | auth_len *= sizeof(struct sadb_alg); | |
1589 | auth_len += sizeof(struct sadb_supported); | |
1590 | } | |
8ff24541 | 1591 | |
7e50f84c | 1592 | enc_len = xfrm_count_pfkey_enc_supported(); |
1da177e4 LT |
1593 | if (enc_len) { |
1594 | enc_len *= sizeof(struct sadb_alg); | |
1595 | enc_len += sizeof(struct sadb_supported); | |
1596 | } | |
8ff24541 | 1597 | |
1da177e4 LT |
1598 | len = enc_len + auth_len + sizeof(struct sadb_msg); |
1599 | ||
1600 | skb = alloc_skb(len + 16, allocation); | |
1601 | if (!skb) | |
1602 | goto out_put_algs; | |
1603 | ||
1604 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr)); | |
1605 | pfkey_hdr_dup(hdr, orig); | |
1606 | hdr->sadb_msg_errno = 0; | |
1607 | hdr->sadb_msg_len = len / sizeof(uint64_t); | |
1608 | ||
1609 | if (auth_len) { | |
1610 | struct sadb_supported *sp; | |
1611 | struct sadb_alg *ap; | |
1612 | ||
1613 | sp = (struct sadb_supported *) skb_put(skb, auth_len); | |
1614 | ap = (struct sadb_alg *) (sp + 1); | |
1615 | ||
1616 | sp->sadb_supported_len = auth_len / sizeof(uint64_t); | |
1617 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; | |
1618 | ||
1619 | for (i = 0; ; i++) { | |
1620 | struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); | |
1621 | if (!aalg) | |
1622 | break; | |
7e50f84c JK |
1623 | if (!aalg->pfkey_supported) |
1624 | continue; | |
1da177e4 LT |
1625 | if (aalg->available) |
1626 | *ap++ = aalg->desc; | |
1627 | } | |
1628 | } | |
1629 | ||
1630 | if (enc_len) { | |
1631 | struct sadb_supported *sp; | |
1632 | struct sadb_alg *ap; | |
1633 | ||
1634 | sp = (struct sadb_supported *) skb_put(skb, enc_len); | |
1635 | ap = (struct sadb_alg *) (sp + 1); | |
1636 | ||
1637 | sp->sadb_supported_len = enc_len / sizeof(uint64_t); | |
1638 | sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; | |
1639 | ||
1640 | for (i = 0; ; i++) { | |
1641 | struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); | |
1642 | if (!ealg) | |
1643 | break; | |
7e50f84c JK |
1644 | if (!ealg->pfkey_supported) |
1645 | continue; | |
1da177e4 LT |
1646 | if (ealg->available) |
1647 | *ap++ = ealg->desc; | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | out_put_algs: | |
1652 | return skb; | |
1653 | } | |
1654 | ||
4c93fbb0 | 1655 | static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1656 | { |
1657 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1658 | struct sk_buff *supp_skb; | |
1659 | ||
1660 | if (hdr->sadb_msg_satype > SADB_SATYPE_MAX) | |
1661 | return -EINVAL; | |
1662 | ||
1663 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) { | |
1664 | if (pfk->registered&(1<<hdr->sadb_msg_satype)) | |
1665 | return -EEXIST; | |
1666 | pfk->registered |= (1<<hdr->sadb_msg_satype); | |
1667 | } | |
1668 | ||
1669 | xfrm_probe_algs(); | |
8ff24541 | 1670 | |
1da177e4 LT |
1671 | supp_skb = compose_sadb_supported(hdr, GFP_KERNEL); |
1672 | if (!supp_skb) { | |
1673 | if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) | |
1674 | pfk->registered &= ~(1<<hdr->sadb_msg_satype); | |
1675 | ||
1676 | return -ENOBUFS; | |
1677 | } | |
1678 | ||
07fb0f17 | 1679 | pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk)); |
1da177e4 LT |
1680 | |
1681 | return 0; | |
1682 | } | |
1683 | ||
4c93fbb0 | 1684 | static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr) |
8be987d7 JHS |
1685 | { |
1686 | struct sk_buff *skb; | |
1687 | struct sadb_msg *hdr; | |
1688 | ||
1689 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1690 | if (!skb) | |
1691 | return -ENOBUFS; | |
1692 | ||
1693 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
1694 | memcpy(hdr, ihdr, sizeof(struct sadb_msg)); | |
1695 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1696 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
1697 | ||
1698 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); | |
1699 | } | |
1700 | ||
214e005b | 1701 | static int key_notify_sa_flush(const struct km_event *c) |
26b15dad JHS |
1702 | { |
1703 | struct sk_buff *skb; | |
1704 | struct sadb_msg *hdr; | |
1705 | ||
1706 | skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); | |
1707 | if (!skb) | |
1708 | return -ENOBUFS; | |
1709 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
bf08867f | 1710 | hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ff | 1711 | hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad | 1712 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 1713 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
1714 | hdr->sadb_msg_version = PF_KEY_V2; |
1715 | hdr->sadb_msg_errno = (uint8_t) 0; | |
1716 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); | |
a5cc68f3 | 1717 | hdr->sadb_msg_reserved = 0; |
26b15dad | 1718 | |
07fb0f17 | 1719 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad JHS |
1720 | |
1721 | return 0; | |
1722 | } | |
1723 | ||
4c93fbb0 | 1724 | static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 1725 | { |
07fb0f17 | 1726 | struct net *net = sock_net(sk); |
95c96174 | 1727 | unsigned int proto; |
26b15dad | 1728 | struct km_event c; |
161a09e7 | 1729 | struct xfrm_audit audit_info; |
8be987d7 | 1730 | int err, err2; |
1da177e4 LT |
1731 | |
1732 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1733 | if (proto == 0) | |
1734 | return -EINVAL; | |
1735 | ||
0c11b942 | 1736 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 1737 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 1738 | audit_info.secid = 0; |
07fb0f17 | 1739 | err = xfrm_state_flush(net, proto, &audit_info); |
8be987d7 | 1740 | err2 = unicast_flush_resp(sk, hdr); |
9e64cc95 JHS |
1741 | if (err || err2) { |
1742 | if (err == -ESRCH) /* empty table - go quietly */ | |
1743 | err = 0; | |
8be987d7 | 1744 | return err ? err : err2; |
9e64cc95 | 1745 | } |
8be987d7 | 1746 | |
bf08867f | 1747 | c.data.proto = proto; |
26b15dad | 1748 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 1749 | c.portid = hdr->sadb_msg_pid; |
f60f6b8f | 1750 | c.event = XFRM_MSG_FLUSHSA; |
07fb0f17 | 1751 | c.net = net; |
26b15dad | 1752 | km_state_notify(NULL, &c); |
1da177e4 LT |
1753 | |
1754 | return 0; | |
1755 | } | |
1756 | ||
1da177e4 LT |
1757 | static int dump_sa(struct xfrm_state *x, int count, void *ptr) |
1758 | { | |
83321d6b | 1759 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
1760 | struct sk_buff *out_skb; |
1761 | struct sadb_msg *out_hdr; | |
1762 | ||
83321d6b TT |
1763 | if (!pfkey_can_dump(&pfk->sk)) |
1764 | return -ENOBUFS; | |
1765 | ||
050f009e | 1766 | out_skb = pfkey_xfrm_state2msg(x); |
1da177e4 LT |
1767 | if (IS_ERR(out_skb)) |
1768 | return PTR_ERR(out_skb); | |
1769 | ||
1770 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 1771 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
1772 | out_hdr->sadb_msg_type = SADB_DUMP; |
1773 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
1774 | out_hdr->sadb_msg_errno = 0; | |
1775 | out_hdr->sadb_msg_reserved = 0; | |
12a169e7 | 1776 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 1777 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
1778 | |
1779 | if (pfk->dump.skb) | |
1780 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 1781 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
1782 | pfk->dump.skb = out_skb; |
1783 | ||
1da177e4 LT |
1784 | return 0; |
1785 | } | |
1786 | ||
83321d6b TT |
1787 | static int pfkey_dump_sa(struct pfkey_sock *pfk) |
1788 | { | |
07fb0f17 AD |
1789 | struct net *net = sock_net(&pfk->sk); |
1790 | return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); | |
83321d6b TT |
1791 | } |
1792 | ||
1793 | static void pfkey_dump_sa_done(struct pfkey_sock *pfk) | |
1794 | { | |
283bc9f3 FD |
1795 | struct net *net = sock_net(&pfk->sk); |
1796 | ||
1797 | xfrm_state_walk_done(&pfk->dump.u.state, net); | |
83321d6b TT |
1798 | } |
1799 | ||
4c93fbb0 | 1800 | static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1801 | { |
1802 | u8 proto; | |
870a2df4 | 1803 | struct xfrm_address_filter *filter = NULL; |
83321d6b TT |
1804 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1805 | ||
1806 | if (pfk->dump.dump != NULL) | |
1807 | return -EBUSY; | |
1da177e4 LT |
1808 | |
1809 | proto = pfkey_satype2proto(hdr->sadb_msg_satype); | |
1810 | if (proto == 0) | |
1811 | return -EINVAL; | |
1812 | ||
d3623099 ND |
1813 | if (ext_hdrs[SADB_X_EXT_FILTER - 1]) { |
1814 | struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1]; | |
1815 | ||
1816 | filter = kmalloc(sizeof(*filter), GFP_KERNEL); | |
1817 | if (filter == NULL) | |
1818 | return -ENOMEM; | |
1819 | ||
1820 | memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr, | |
1821 | sizeof(xfrm_address_t)); | |
1822 | memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr, | |
1823 | sizeof(xfrm_address_t)); | |
1824 | filter->family = xfilter->sadb_x_filter_family; | |
1825 | filter->splen = xfilter->sadb_x_filter_splen; | |
1826 | filter->dplen = xfilter->sadb_x_filter_dplen; | |
1827 | } | |
1828 | ||
83321d6b | 1829 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 1830 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
1831 | pfk->dump.dump = pfkey_dump_sa; |
1832 | pfk->dump.done = pfkey_dump_sa_done; | |
d3623099 | 1833 | xfrm_state_walk_init(&pfk->dump.u.state, proto, filter); |
4c563f76 | 1834 | |
83321d6b | 1835 | return pfkey_do_dump(pfk); |
1da177e4 LT |
1836 | } |
1837 | ||
4c93fbb0 | 1838 | static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 LT |
1839 | { |
1840 | struct pfkey_sock *pfk = pfkey_sk(sk); | |
1841 | int satype = hdr->sadb_msg_satype; | |
4c93fbb0 | 1842 | bool reset_errno = false; |
1da177e4 LT |
1843 | |
1844 | if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { | |
4c93fbb0 | 1845 | reset_errno = true; |
1da177e4 LT |
1846 | if (satype != 0 && satype != 1) |
1847 | return -EINVAL; | |
1848 | pfk->promisc = satype; | |
1849 | } | |
4c93fbb0 DM |
1850 | if (reset_errno && skb_cloned(skb)) |
1851 | skb = skb_copy(skb, GFP_KERNEL); | |
1852 | else | |
1853 | skb = skb_clone(skb, GFP_KERNEL); | |
1854 | ||
1855 | if (reset_errno && skb) { | |
1856 | struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data; | |
1857 | new_hdr->sadb_msg_errno = 0; | |
1858 | } | |
1859 | ||
1860 | pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk)); | |
1da177e4 LT |
1861 | return 0; |
1862 | } | |
1863 | ||
1864 | static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
1865 | { | |
1866 | int i; | |
1867 | u32 reqid = *(u32*)ptr; | |
1868 | ||
1869 | for (i=0; i<xp->xfrm_nr; i++) { | |
1870 | if (xp->xfrm_vec[i].reqid == reqid) | |
1871 | return -EEXIST; | |
1872 | } | |
1873 | return 0; | |
1874 | } | |
1875 | ||
07fb0f17 | 1876 | static u32 gen_reqid(struct net *net) |
1da177e4 | 1877 | { |
4c563f76 | 1878 | struct xfrm_policy_walk walk; |
1da177e4 | 1879 | u32 start; |
4c563f76 | 1880 | int rc; |
1da177e4 LT |
1881 | static u32 reqid = IPSEC_MANUAL_REQID_MAX; |
1882 | ||
1883 | start = reqid; | |
1884 | do { | |
1885 | ++reqid; | |
1886 | if (reqid == 0) | |
1887 | reqid = IPSEC_MANUAL_REQID_MAX+1; | |
4c563f76 | 1888 | xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f17 | 1889 | rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
283bc9f3 | 1890 | xfrm_policy_walk_done(&walk, net); |
4c563f76 | 1891 | if (rc != -EEXIST) |
1da177e4 LT |
1892 | return reqid; |
1893 | } while (reqid != start); | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | static int | |
1898 | parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) | |
1899 | { | |
07fb0f17 | 1900 | struct net *net = xp_net(xp); |
1da177e4 | 1901 | struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce2 | 1902 | int mode; |
1da177e4 LT |
1903 | |
1904 | if (xp->xfrm_nr >= XFRM_MAX_DEPTH) | |
1905 | return -ELOOP; | |
1906 | ||
1907 | if (rq->sadb_x_ipsecrequest_mode == 0) | |
1908 | return -EINVAL; | |
1909 | ||
1910 | t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */ | |
55569ce2 KM |
1911 | if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) |
1912 | return -EINVAL; | |
1913 | t->mode = mode; | |
1da177e4 LT |
1914 | if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE) |
1915 | t->optional = 1; | |
1916 | else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) { | |
1917 | t->reqid = rq->sadb_x_ipsecrequest_reqid; | |
1918 | if (t->reqid > IPSEC_MANUAL_REQID_MAX) | |
1919 | t->reqid = 0; | |
07fb0f17 | 1920 | if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4 LT |
1921 | return -ENOBUFS; |
1922 | } | |
1923 | ||
1924 | /* addresses present only in tunnel mode */ | |
7e49e6de | 1925 | if (t->mode == XFRM_MODE_TUNNEL) { |
5f95ac91 YH |
1926 | u8 *sa = (u8 *) (rq + 1); |
1927 | int family, socklen; | |
1928 | ||
1929 | family = pfkey_sockaddr_extract((struct sockaddr *)sa, | |
1930 | &t->saddr); | |
1931 | if (!family) | |
1da177e4 | 1932 | return -EINVAL; |
5f95ac91 YH |
1933 | |
1934 | socklen = pfkey_sockaddr_len(family); | |
1935 | if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), | |
1936 | &t->id.daddr) != family) | |
1937 | return -EINVAL; | |
1938 | t->encap_family = family; | |
2718aa7c MK |
1939 | } else |
1940 | t->encap_family = xp->family; | |
1941 | ||
1da177e4 | 1942 | /* No way to set this via kame pfkey */ |
c5d18e98 | 1943 | t->allalgs = 1; |
1da177e4 LT |
1944 | xp->xfrm_nr++; |
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | static int | |
1949 | parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol) | |
1950 | { | |
1951 | int err; | |
1952 | int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy); | |
1953 | struct sadb_x_ipsecrequest *rq = (void*)(pol+1); | |
1954 | ||
f674e72f DC |
1955 | if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy)) |
1956 | return -EINVAL; | |
1957 | ||
1da177e4 LT |
1958 | while (len >= sizeof(struct sadb_x_ipsecrequest)) { |
1959 | if ((err = parse_ipsecrequest(xp, rq)) < 0) | |
1960 | return err; | |
1961 | len -= rq->sadb_x_ipsecrequest_len; | |
1962 | rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len); | |
1963 | } | |
1964 | return 0; | |
1965 | } | |
1966 | ||
4c93fbb0 | 1967 | static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp) |
df71837d TJ |
1968 | { |
1969 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
1970 | ||
1971 | if (xfrm_ctx) { | |
1972 | int len = sizeof(struct sadb_x_sec_ctx); | |
1973 | len += xfrm_ctx->ctx_len; | |
1974 | return PFKEY_ALIGN8(len); | |
1975 | } | |
1976 | return 0; | |
1977 | } | |
1978 | ||
4c93fbb0 | 1979 | static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp) |
1da177e4 | 1980 | { |
4c93fbb0 | 1981 | const struct xfrm_tmpl *t; |
1da177e4 | 1982 | int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c MK |
1983 | int socklen = 0; |
1984 | int i; | |
1985 | ||
1986 | for (i=0; i<xp->xfrm_nr; i++) { | |
1987 | t = xp->xfrm_vec + i; | |
9e8b4ed8 | 1988 | socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c | 1989 | } |
1da177e4 LT |
1990 | |
1991 | return sizeof(struct sadb_msg) + | |
1992 | (sizeof(struct sadb_lifetime) * 3) + | |
8ff24541 | 1993 | (sizeof(struct sadb_address) * 2) + |
1da177e4 LT |
1994 | (sockaddr_size * 2) + |
1995 | sizeof(struct sadb_x_policy) + | |
2718aa7c MK |
1996 | (xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + |
1997 | (socklen * 2) + | |
df71837d | 1998 | pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4 LT |
1999 | } |
2000 | ||
4c93fbb0 | 2001 | static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp) |
1da177e4 LT |
2002 | { |
2003 | struct sk_buff *skb; | |
2004 | int size; | |
2005 | ||
2006 | size = pfkey_xfrm_policy2msg_size(xp); | |
2007 | ||
2008 | skb = alloc_skb(size + 16, GFP_ATOMIC); | |
2009 | if (skb == NULL) | |
2010 | return ERR_PTR(-ENOBUFS); | |
2011 | ||
2012 | return skb; | |
2013 | } | |
2014 | ||
4c93fbb0 | 2015 | static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir) |
1da177e4 LT |
2016 | { |
2017 | struct sadb_msg *hdr; | |
2018 | struct sadb_address *addr; | |
2019 | struct sadb_lifetime *lifetime; | |
2020 | struct sadb_x_policy *pol; | |
df71837d TJ |
2021 | struct sadb_x_sec_ctx *sec_ctx; |
2022 | struct xfrm_sec_ctx *xfrm_ctx; | |
1da177e4 LT |
2023 | int i; |
2024 | int size; | |
2025 | int sockaddr_size = pfkey_sockaddr_size(xp->family); | |
9e8b4ed8 | 2026 | int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4 LT |
2027 | |
2028 | size = pfkey_xfrm_policy2msg_size(xp); | |
2029 | ||
2030 | /* call should fill header later */ | |
2031 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); | |
2032 | memset(hdr, 0, size); /* XXX do we need this ? */ | |
2033 | ||
2034 | /* src address */ | |
8ff24541 | 2035 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 2036 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 2037 | addr->sadb_address_len = |
1da177e4 LT |
2038 | (sizeof(struct sadb_address)+sockaddr_size)/ |
2039 | sizeof(uint64_t); | |
2040 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
2041 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
2042 | addr->sadb_address_prefixlen = xp->selector.prefixlen_s; | |
2043 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
2044 | if (!pfkey_sockaddr_fill(&xp->selector.saddr, |
2045 | xp->selector.sport, | |
2046 | (struct sockaddr *) (addr + 1), | |
2047 | xp->family)) | |
1da177e4 LT |
2048 | BUG(); |
2049 | ||
2050 | /* dst address */ | |
8ff24541 | 2051 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
2052 | sizeof(struct sadb_address)+sockaddr_size); |
2053 | addr->sadb_address_len = | |
2054 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
2055 | sizeof(uint64_t); | |
2056 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
2057 | addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto); | |
8ff24541 | 2058 | addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4 | 2059 | addr->sadb_address_reserved = 0; |
e5b56652 YH |
2060 | |
2061 | pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, | |
2062 | (struct sockaddr *) (addr + 1), | |
2063 | xp->family); | |
1da177e4 LT |
2064 | |
2065 | /* hard time */ | |
8ff24541 | 2066 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2067 | sizeof(struct sadb_lifetime)); |
2068 | lifetime->sadb_lifetime_len = | |
2069 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2070 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; | |
2071 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit); | |
2072 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit); | |
2073 | lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds; | |
2074 | lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds; | |
2075 | /* soft time */ | |
8ff24541 | 2076 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2077 | sizeof(struct sadb_lifetime)); |
2078 | lifetime->sadb_lifetime_len = | |
2079 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2080 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; | |
2081 | lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit); | |
2082 | lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit); | |
2083 | lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds; | |
2084 | lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds; | |
2085 | /* current time */ | |
8ff24541 | 2086 | lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4 LT |
2087 | sizeof(struct sadb_lifetime)); |
2088 | lifetime->sadb_lifetime_len = | |
2089 | sizeof(struct sadb_lifetime)/sizeof(uint64_t); | |
2090 | lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; | |
2091 | lifetime->sadb_lifetime_allocations = xp->curlft.packets; | |
2092 | lifetime->sadb_lifetime_bytes = xp->curlft.bytes; | |
2093 | lifetime->sadb_lifetime_addtime = xp->curlft.add_time; | |
2094 | lifetime->sadb_lifetime_usetime = xp->curlft.use_time; | |
2095 | ||
2096 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
2097 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
2098 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
2099 | pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD; | |
2100 | if (xp->action == XFRM_POLICY_ALLOW) { | |
2101 | if (xp->xfrm_nr) | |
2102 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
2103 | else | |
2104 | pol->sadb_x_policy_type = IPSEC_POLICY_NONE; | |
2105 | } | |
2106 | pol->sadb_x_policy_dir = dir+1; | |
ff862a46 | 2107 | pol->sadb_x_policy_reserved = 0; |
1da177e4 LT |
2108 | pol->sadb_x_policy_id = xp->index; |
2109 | pol->sadb_x_policy_priority = xp->priority; | |
2110 | ||
2111 | for (i=0; i<xp->xfrm_nr; i++) { | |
4c93fbb0 | 2112 | const struct xfrm_tmpl *t = xp->xfrm_vec + i; |
1da177e4 | 2113 | struct sadb_x_ipsecrequest *rq; |
1da177e4 | 2114 | int req_size; |
55569ce2 | 2115 | int mode; |
1da177e4 LT |
2116 | |
2117 | req_size = sizeof(struct sadb_x_ipsecrequest); | |
e5b56652 YH |
2118 | if (t->mode == XFRM_MODE_TUNNEL) { |
2119 | socklen = pfkey_sockaddr_len(t->encap_family); | |
2120 | req_size += socklen * 2; | |
2121 | } else { | |
1da177e4 | 2122 | size -= 2*socklen; |
e5b56652 | 2123 | } |
1da177e4 LT |
2124 | rq = (void*)skb_put(skb, req_size); |
2125 | pol->sadb_x_policy_len += req_size/8; | |
2126 | memset(rq, 0, sizeof(*rq)); | |
2127 | rq->sadb_x_ipsecrequest_len = req_size; | |
2128 | rq->sadb_x_ipsecrequest_proto = t->id.proto; | |
55569ce2 KM |
2129 | if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) |
2130 | return -EINVAL; | |
fefaa75e | 2131 | rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4 LT |
2132 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE; |
2133 | if (t->reqid) | |
2134 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE; | |
2135 | if (t->optional) | |
2136 | rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE; | |
2137 | rq->sadb_x_ipsecrequest_reqid = t->reqid; | |
e5b56652 | 2138 | |
7e49e6de | 2139 | if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652 YH |
2140 | u8 *sa = (void *)(rq + 1); |
2141 | pfkey_sockaddr_fill(&t->saddr, 0, | |
2142 | (struct sockaddr *)sa, | |
2143 | t->encap_family); | |
2144 | pfkey_sockaddr_fill(&t->id.daddr, 0, | |
2145 | (struct sockaddr *) (sa + socklen), | |
2146 | t->encap_family); | |
1da177e4 LT |
2147 | } |
2148 | } | |
df71837d TJ |
2149 | |
2150 | /* security context */ | |
2151 | if ((xfrm_ctx = xp->security)) { | |
2152 | int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp); | |
2153 | ||
2154 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size); | |
2155 | sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t); | |
2156 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
2157 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
2158 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
2159 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
2160 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
2161 | xfrm_ctx->ctx_len); | |
2162 | } | |
2163 | ||
1da177e4 LT |
2164 | hdr->sadb_msg_len = size / sizeof(uint64_t); |
2165 | hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); | |
55569ce2 KM |
2166 | |
2167 | return 0; | |
1da177e4 LT |
2168 | } |
2169 | ||
214e005b | 2170 | static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2171 | { |
2172 | struct sk_buff *out_skb; | |
2173 | struct sadb_msg *out_hdr; | |
2174 | int err; | |
2175 | ||
2176 | out_skb = pfkey_xfrm_policy2msg_prep(xp); | |
9a127aad DC |
2177 | if (IS_ERR(out_skb)) |
2178 | return PTR_ERR(out_skb); | |
2179 | ||
55569ce2 KM |
2180 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2181 | if (err < 0) | |
2182 | return err; | |
26b15dad JHS |
2183 | |
2184 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2185 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
2186 | ||
f60f6b8f | 2187 | if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad JHS |
2188 | out_hdr->sadb_msg_type = SADB_X_SPDDELETE2; |
2189 | else | |
2190 | out_hdr->sadb_msg_type = event2poltype(c->event); | |
2191 | out_hdr->sadb_msg_errno = 0; | |
2192 | out_hdr->sadb_msg_seq = c->seq; | |
15e47304 | 2193 | out_hdr->sadb_msg_pid = c->portid; |
07fb0f17 | 2194 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad JHS |
2195 | return 0; |
2196 | ||
2197 | } | |
2198 | ||
4c93fbb0 | 2199 | static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2200 | { |
07fb0f17 | 2201 | struct net *net = sock_net(sk); |
df71837d | 2202 | int err = 0; |
1da177e4 LT |
2203 | struct sadb_lifetime *lifetime; |
2204 | struct sadb_address *sa; | |
2205 | struct sadb_x_policy *pol; | |
2206 | struct xfrm_policy *xp; | |
26b15dad | 2207 | struct km_event c; |
df71837d | 2208 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 LT |
2209 | |
2210 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2211 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2212 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2213 | return -EINVAL; | |
2214 | ||
2215 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2216 | if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC) | |
2217 | return -EINVAL; | |
2218 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2219 | return -EINVAL; | |
2220 | ||
07fb0f17 | 2221 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2222 | if (xp == NULL) |
2223 | return -ENOBUFS; | |
2224 | ||
2225 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
2226 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
2227 | xp->priority = pol->sadb_x_policy_priority; | |
2228 | ||
d0d79c3f | 2229 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 | 2230 | xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
1da177e4 LT |
2231 | xp->selector.family = xp->family; |
2232 | xp->selector.prefixlen_s = sa->sadb_address_prefixlen; | |
2233 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2234 | xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2235 | if (xp->selector.sport) | |
8f83f23e | 2236 | xp->selector.sport_mask = htons(0xffff); |
1da177e4 | 2237 | |
d0d79c3f | 2238 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2239 | pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr); |
2240 | xp->selector.prefixlen_d = sa->sadb_address_prefixlen; | |
2241 | ||
2242 | /* Amusing, we set this twice. KAME apps appear to set same value | |
2243 | * in both addresses. | |
2244 | */ | |
2245 | xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2246 | ||
2247 | xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2248 | if (xp->selector.dport) | |
8f83f23e | 2249 | xp->selector.dport_mask = htons(0xffff); |
1da177e4 | 2250 | |
ea110733 | 2251 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2252 | if (sec_ctx != NULL) { |
87536a81 | 2253 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2254 | |
2255 | if (!uctx) { | |
2256 | err = -ENOBUFS; | |
2257 | goto out; | |
2258 | } | |
2259 | ||
52a4c640 | 2260 | err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL); |
df71837d TJ |
2261 | kfree(uctx); |
2262 | ||
2263 | if (err) | |
2264 | goto out; | |
2265 | } | |
2266 | ||
1da177e4 LT |
2267 | xp->lft.soft_byte_limit = XFRM_INF; |
2268 | xp->lft.hard_byte_limit = XFRM_INF; | |
2269 | xp->lft.soft_packet_limit = XFRM_INF; | |
2270 | xp->lft.hard_packet_limit = XFRM_INF; | |
2271 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) { | |
2272 | xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2273 | xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2274 | xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2275 | xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2276 | } | |
2277 | if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) { | |
2278 | xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations); | |
2279 | xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes); | |
2280 | xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime; | |
2281 | xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime; | |
2282 | } | |
2283 | xp->xfrm_nr = 0; | |
2284 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
2285 | (err = parse_ipsecrequests(xp, pol)) < 0) | |
2286 | goto out; | |
2287 | ||
1da177e4 LT |
2288 | err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, |
2289 | hdr->sadb_msg_type != SADB_X_SPDUPDATE); | |
df71837d | 2290 | |
ab5f5e8b | 2291 | xfrm_audit_policy_add(xp, err ? 0 : 1, |
2532386f EP |
2292 | audit_get_loginuid(current), |
2293 | audit_get_sessionid(current), 0); | |
161a09e7 | 2294 | |
df71837d TJ |
2295 | if (err) |
2296 | goto out; | |
1da177e4 | 2297 | |
26b15dad | 2298 | if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f | 2299 | c.event = XFRM_MSG_UPDPOLICY; |
8ff24541 | 2300 | else |
f60f6b8f | 2301 | c.event = XFRM_MSG_NEWPOLICY; |
1da177e4 | 2302 | |
26b15dad | 2303 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2304 | c.portid = hdr->sadb_msg_pid; |
1da177e4 | 2305 | |
26b15dad JHS |
2306 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2307 | xfrm_pol_put(xp); | |
1da177e4 LT |
2308 | return 0; |
2309 | ||
2310 | out: | |
12a169e7 | 2311 | xp->walk.dead = 1; |
64c31b3f | 2312 | xfrm_policy_destroy(xp); |
1da177e4 LT |
2313 | return err; |
2314 | } | |
2315 | ||
4c93fbb0 | 2316 | static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2317 | { |
07fb0f17 | 2318 | struct net *net = sock_net(sk); |
1da177e4 LT |
2319 | int err; |
2320 | struct sadb_address *sa; | |
2321 | struct sadb_x_policy *pol; | |
03e1ad7b | 2322 | struct xfrm_policy *xp; |
1da177e4 | 2323 | struct xfrm_selector sel; |
26b15dad | 2324 | struct km_event c; |
df71837d | 2325 | struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e | 2326 | struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4 LT |
2327 | |
2328 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1], | |
2329 | ext_hdrs[SADB_EXT_ADDRESS_DST-1]) || | |
2330 | !ext_hdrs[SADB_X_EXT_POLICY-1]) | |
2331 | return -EINVAL; | |
2332 | ||
2333 | pol = ext_hdrs[SADB_X_EXT_POLICY-1]; | |
2334 | if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) | |
2335 | return -EINVAL; | |
2336 | ||
2337 | memset(&sel, 0, sizeof(sel)); | |
2338 | ||
d0d79c3f | 2339 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4 LT |
2340 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); |
2341 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2342 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2343 | sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2344 | if (sel.sport) | |
8f83f23e | 2345 | sel.sport_mask = htons(0xffff); |
1da177e4 | 2346 | |
d0d79c3f | 2347 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4 LT |
2348 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); |
2349 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2350 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2351 | sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port; | |
2352 | if (sel.dport) | |
8f83f23e | 2353 | sel.dport_mask = htons(0xffff); |
1da177e4 | 2354 | |
ea110733 | 2355 | sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d | 2356 | if (sec_ctx != NULL) { |
87536a81 | 2357 | struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d TJ |
2358 | |
2359 | if (!uctx) | |
2360 | return -ENOMEM; | |
2361 | ||
52a4c640 | 2362 | err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL); |
df71837d | 2363 | kfree(uctx); |
df71837d TJ |
2364 | if (err) |
2365 | return err; | |
2db3e47e | 2366 | } |
161a09e7 | 2367 | |
8ca2e93b | 2368 | xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b PM |
2369 | pol->sadb_x_policy_dir - 1, &sel, pol_ctx, |
2370 | 1, &err); | |
2371 | security_xfrm_policy_free(pol_ctx); | |
1da177e4 LT |
2372 | if (xp == NULL) |
2373 | return -ENOENT; | |
2374 | ||
ab5f5e8b | 2375 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2376 | audit_get_loginuid(current), |
2377 | audit_get_sessionid(current), 0); | |
13fcfbb0 DM |
2378 | |
2379 | if (err) | |
c8c05a8e | 2380 | goto out; |
13fcfbb0 | 2381 | |
26b15dad | 2382 | c.seq = hdr->sadb_msg_seq; |
15e47304 | 2383 | c.portid = hdr->sadb_msg_pid; |
1839faab | 2384 | c.data.byid = 0; |
f60f6b8f | 2385 | c.event = XFRM_MSG_DELPOLICY; |
26b15dad JHS |
2386 | km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
2387 | ||
c8c05a8e | 2388 | out: |
26b15dad | 2389 | xfrm_pol_put(xp); |
e4c17216 PM |
2390 | if (err == 0) |
2391 | xfrm_garbage_collect(net); | |
26b15dad JHS |
2392 | return err; |
2393 | } | |
2394 | ||
4c93fbb0 | 2395 | static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir) |
26b15dad JHS |
2396 | { |
2397 | int err; | |
2398 | struct sk_buff *out_skb; | |
2399 | struct sadb_msg *out_hdr; | |
2400 | err = 0; | |
2401 | ||
1da177e4 LT |
2402 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2403 | if (IS_ERR(out_skb)) { | |
2404 | err = PTR_ERR(out_skb); | |
2405 | goto out; | |
2406 | } | |
55569ce2 KM |
2407 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2408 | if (err < 0) | |
2409 | goto out; | |
1da177e4 LT |
2410 | |
2411 | out_hdr = (struct sadb_msg *) out_skb->data; | |
2412 | out_hdr->sadb_msg_version = hdr->sadb_msg_version; | |
26b15dad | 2413 | out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4 LT |
2414 | out_hdr->sadb_msg_satype = 0; |
2415 | out_hdr->sadb_msg_errno = 0; | |
2416 | out_hdr->sadb_msg_seq = hdr->sadb_msg_seq; | |
2417 | out_hdr->sadb_msg_pid = hdr->sadb_msg_pid; | |
07fb0f17 | 2418 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4 LT |
2419 | err = 0; |
2420 | ||
2421 | out: | |
1da177e4 LT |
2422 | return err; |
2423 | } | |
2424 | ||
08de61be SS |
2425 | #ifdef CONFIG_NET_KEY_MIGRATE |
2426 | static int pfkey_sockaddr_pair_size(sa_family_t family) | |
2427 | { | |
9e8b4ed8 | 2428 | return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61be SS |
2429 | } |
2430 | ||
13c1d189 | 2431 | static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61be SS |
2432 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
2433 | u16 *family) | |
2434 | { | |
5f95ac91 YH |
2435 | int af, socklen; |
2436 | ||
13c1d189 | 2437 | if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61be SS |
2438 | return -EINVAL; |
2439 | ||
13c1d189 | 2440 | af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac91 YH |
2441 | if (!af) |
2442 | return -EINVAL; | |
2443 | ||
2444 | socklen = pfkey_sockaddr_len(af); | |
13c1d189 | 2445 | if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac91 | 2446 | daddr) != af) |
08de61be | 2447 | return -EINVAL; |
08de61be | 2448 | |
5f95ac91 | 2449 | *family = af; |
08de61be SS |
2450 | return 0; |
2451 | } | |
2452 | ||
2453 | static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len, | |
2454 | struct xfrm_migrate *m) | |
2455 | { | |
2456 | int err; | |
2457 | struct sadb_x_ipsecrequest *rq2; | |
55569ce2 | 2458 | int mode; |
08de61be SS |
2459 | |
2460 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2461 | len < rq1->sadb_x_ipsecrequest_len) | |
2462 | return -EINVAL; | |
2463 | ||
2464 | /* old endoints */ | |
13c1d189 AE |
2465 | err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), |
2466 | rq1->sadb_x_ipsecrequest_len, | |
2467 | &m->old_saddr, &m->old_daddr, | |
08de61be SS |
2468 | &m->old_family); |
2469 | if (err) | |
2470 | return err; | |
2471 | ||
2472 | rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len); | |
2473 | len -= rq1->sadb_x_ipsecrequest_len; | |
2474 | ||
2475 | if (len <= sizeof(struct sadb_x_ipsecrequest) || | |
2476 | len < rq2->sadb_x_ipsecrequest_len) | |
2477 | return -EINVAL; | |
2478 | ||
2479 | /* new endpoints */ | |
13c1d189 AE |
2480 | err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), |
2481 | rq2->sadb_x_ipsecrequest_len, | |
2482 | &m->new_saddr, &m->new_daddr, | |
08de61be SS |
2483 | &m->new_family); |
2484 | if (err) | |
2485 | return err; | |
2486 | ||
2487 | if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto || | |
2488 | rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode || | |
2489 | rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid) | |
2490 | return -EINVAL; | |
2491 | ||
2492 | m->proto = rq1->sadb_x_ipsecrequest_proto; | |
55569ce2 KM |
2493 | if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) |
2494 | return -EINVAL; | |
2495 | m->mode = mode; | |
08de61be SS |
2496 | m->reqid = rq1->sadb_x_ipsecrequest_reqid; |
2497 | ||
2498 | return ((int)(rq1->sadb_x_ipsecrequest_len + | |
2499 | rq2->sadb_x_ipsecrequest_len)); | |
2500 | } | |
2501 | ||
2502 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2503 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2504 | { |
2505 | int i, len, ret, err = -EINVAL; | |
2506 | u8 dir; | |
2507 | struct sadb_address *sa; | |
13c1d189 | 2508 | struct sadb_x_kmaddress *kma; |
08de61be SS |
2509 | struct sadb_x_policy *pol; |
2510 | struct sadb_x_ipsecrequest *rq; | |
2511 | struct xfrm_selector sel; | |
2512 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
13c1d189 | 2513 | struct xfrm_kmaddress k; |
8d549c4f | 2514 | struct net *net = sock_net(sk); |
08de61be SS |
2515 | |
2516 | if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], | |
13c1d189 | 2517 | ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61be SS |
2518 | !ext_hdrs[SADB_X_EXT_POLICY - 1]) { |
2519 | err = -EINVAL; | |
2520 | goto out; | |
2521 | } | |
2522 | ||
13c1d189 | 2523 | kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61be | 2524 | pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61be SS |
2525 | |
2526 | if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { | |
2527 | err = -EINVAL; | |
2528 | goto out; | |
2529 | } | |
2530 | ||
13c1d189 AE |
2531 | if (kma) { |
2532 | /* convert sadb_x_kmaddress to xfrm_kmaddress */ | |
2533 | k.reserved = kma->sadb_x_kmaddress_reserved; | |
2534 | ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1), | |
2535 | 8*(kma->sadb_x_kmaddress_len) - sizeof(*kma), | |
2536 | &k.local, &k.remote, &k.family); | |
2537 | if (ret < 0) { | |
2538 | err = ret; | |
2539 | goto out; | |
2540 | } | |
2541 | } | |
2542 | ||
08de61be SS |
2543 | dir = pol->sadb_x_policy_dir - 1; |
2544 | memset(&sel, 0, sizeof(sel)); | |
2545 | ||
2546 | /* set source address info of selector */ | |
2547 | sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1]; | |
2548 | sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr); | |
2549 | sel.prefixlen_s = sa->sadb_address_prefixlen; | |
2550 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2551 | sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2552 | if (sel.sport) | |
582ee43d | 2553 | sel.sport_mask = htons(0xffff); |
08de61be SS |
2554 | |
2555 | /* set destination address info of selector */ | |
2556 | sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1], | |
2557 | pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr); | |
2558 | sel.prefixlen_d = sa->sadb_address_prefixlen; | |
2559 | sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto); | |
2560 | sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port; | |
2561 | if (sel.dport) | |
582ee43d | 2562 | sel.dport_mask = htons(0xffff); |
08de61be SS |
2563 | |
2564 | rq = (struct sadb_x_ipsecrequest *)(pol + 1); | |
2565 | ||
2566 | /* extract ipsecrequests */ | |
2567 | i = 0; | |
2568 | len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy); | |
2569 | ||
2570 | while (len > 0 && i < XFRM_MAX_DEPTH) { | |
2571 | ret = ipsecrequests_to_migrate(rq, len, &m[i]); | |
2572 | if (ret < 0) { | |
2573 | err = ret; | |
2574 | goto out; | |
2575 | } else { | |
2576 | rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret); | |
2577 | len -= ret; | |
2578 | i++; | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | if (!i || len > 0) { | |
2583 | err = -EINVAL; | |
2584 | goto out; | |
2585 | } | |
2586 | ||
13c1d189 | 2587 | return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
8d549c4f | 2588 | kma ? &k : NULL, net); |
08de61be SS |
2589 | |
2590 | out: | |
2591 | return err; | |
2592 | } | |
2593 | #else | |
2594 | static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, | |
7f6daa63 | 2595 | const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61be SS |
2596 | { |
2597 | return -ENOPROTOOPT; | |
2598 | } | |
2599 | #endif | |
2600 | ||
2601 | ||
4c93fbb0 | 2602 | static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2603 | { |
07fb0f17 | 2604 | struct net *net = sock_net(sk); |
77d8d7a6 | 2605 | unsigned int dir; |
215a2dd3 | 2606 | int err = 0, delete; |
1da177e4 LT |
2607 | struct sadb_x_policy *pol; |
2608 | struct xfrm_policy *xp; | |
26b15dad | 2609 | struct km_event c; |
1da177e4 LT |
2610 | |
2611 | if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) | |
2612 | return -EINVAL; | |
2613 | ||
77d8d7a6 HX |
2614 | dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); |
2615 | if (dir >= XFRM_POLICY_MAX) | |
2616 | return -EINVAL; | |
2617 | ||
215a2dd3 | 2618 | delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
8ca2e93b | 2619 | xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
bd55775c | 2620 | dir, pol->sadb_x_policy_id, delete, &err); |
1da177e4 LT |
2621 | if (xp == NULL) |
2622 | return -ENOENT; | |
2623 | ||
215a2dd3 | 2624 | if (delete) { |
ab5f5e8b | 2625 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f EP |
2626 | audit_get_loginuid(current), |
2627 | audit_get_sessionid(current), 0); | |
1da177e4 | 2628 | |
215a2dd3 EP |
2629 | if (err) |
2630 | goto out; | |
2631 | c.seq = hdr->sadb_msg_seq; | |
15e47304 | 2632 | c.portid = hdr->sadb_msg_pid; |
bf08867f | 2633 | c.data.byid = 1; |
f60f6b8f | 2634 | c.event = XFRM_MSG_DELPOLICY; |
77d8d7a6 | 2635 | km_policy_notify(xp, dir, &c); |
26b15dad | 2636 | } else { |
77d8d7a6 | 2637 | err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4 | 2638 | } |
1da177e4 | 2639 | |
215a2dd3 | 2640 | out: |
1da177e4 | 2641 | xfrm_pol_put(xp); |
e4c17216 PM |
2642 | if (delete && err == 0) |
2643 | xfrm_garbage_collect(net); | |
1da177e4 LT |
2644 | return err; |
2645 | } | |
2646 | ||
2647 | static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) | |
2648 | { | |
83321d6b | 2649 | struct pfkey_sock *pfk = ptr; |
1da177e4 LT |
2650 | struct sk_buff *out_skb; |
2651 | struct sadb_msg *out_hdr; | |
55569ce2 | 2652 | int err; |
1da177e4 | 2653 | |
83321d6b TT |
2654 | if (!pfkey_can_dump(&pfk->sk)) |
2655 | return -ENOBUFS; | |
2656 | ||
1da177e4 LT |
2657 | out_skb = pfkey_xfrm_policy2msg_prep(xp); |
2658 | if (IS_ERR(out_skb)) | |
2659 | return PTR_ERR(out_skb); | |
2660 | ||
55569ce2 KM |
2661 | err = pfkey_xfrm_policy2msg(out_skb, xp, dir); |
2662 | if (err < 0) | |
2663 | return err; | |
1da177e4 LT |
2664 | |
2665 | out_hdr = (struct sadb_msg *) out_skb->data; | |
83321d6b | 2666 | out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4 LT |
2667 | out_hdr->sadb_msg_type = SADB_X_SPDDUMP; |
2668 | out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; | |
2669 | out_hdr->sadb_msg_errno = 0; | |
12a169e7 | 2670 | out_hdr->sadb_msg_seq = count + 1; |
15e47304 | 2671 | out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7 HX |
2672 | |
2673 | if (pfk->dump.skb) | |
2674 | pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, | |
07fb0f17 | 2675 | &pfk->sk, sock_net(&pfk->sk)); |
12a169e7 HX |
2676 | pfk->dump.skb = out_skb; |
2677 | ||
1da177e4 LT |
2678 | return 0; |
2679 | } | |
2680 | ||
83321d6b TT |
2681 | static int pfkey_dump_sp(struct pfkey_sock *pfk) |
2682 | { | |
07fb0f17 AD |
2683 | struct net *net = sock_net(&pfk->sk); |
2684 | return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); | |
83321d6b TT |
2685 | } |
2686 | ||
2687 | static void pfkey_dump_sp_done(struct pfkey_sock *pfk) | |
2688 | { | |
283bc9f3 FD |
2689 | struct net *net = sock_net((struct sock *)pfk); |
2690 | ||
2691 | xfrm_policy_walk_done(&pfk->dump.u.policy, net); | |
83321d6b TT |
2692 | } |
2693 | ||
4c93fbb0 | 2694 | static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4 | 2695 | { |
83321d6b | 2696 | struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f76 | 2697 | |
83321d6b TT |
2698 | if (pfk->dump.dump != NULL) |
2699 | return -EBUSY; | |
1da177e4 | 2700 | |
83321d6b | 2701 | pfk->dump.msg_version = hdr->sadb_msg_version; |
15e47304 | 2702 | pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b TT |
2703 | pfk->dump.dump = pfkey_dump_sp; |
2704 | pfk->dump.done = pfkey_dump_sp_done; | |
2705 | xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN); | |
2706 | ||
2707 | return pfkey_do_dump(pfk); | |
1da177e4 LT |
2708 | } |
2709 | ||
214e005b | 2710 | static int key_notify_policy_flush(const struct km_event *c) |
1da177e4 LT |
2711 | { |
2712 | struct sk_buff *skb_out; | |
26b15dad | 2713 | struct sadb_msg *hdr; |
1da177e4 | 2714 | |
26b15dad | 2715 | skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4 LT |
2716 | if (!skb_out) |
2717 | return -ENOBUFS; | |
26b15dad | 2718 | hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ff | 2719 | hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad | 2720 | hdr->sadb_msg_seq = c->seq; |
15e47304 | 2721 | hdr->sadb_msg_pid = c->portid; |
26b15dad JHS |
2722 | hdr->sadb_msg_version = PF_KEY_V2; |
2723 | hdr->sadb_msg_errno = (uint8_t) 0; | |
85dfb745 | 2724 | hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; |
26b15dad | 2725 | hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
a5cc68f3 | 2726 | hdr->sadb_msg_reserved = 0; |
07fb0f17 | 2727 | pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad | 2728 | return 0; |
1da177e4 | 2729 | |
26b15dad JHS |
2730 | } |
2731 | ||
4c93fbb0 | 2732 | static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
26b15dad | 2733 | { |
07fb0f17 | 2734 | struct net *net = sock_net(sk); |
26b15dad | 2735 | struct km_event c; |
161a09e7 | 2736 | struct xfrm_audit audit_info; |
8be987d7 | 2737 | int err, err2; |
1da177e4 | 2738 | |
0c11b942 | 2739 | audit_info.loginuid = audit_get_loginuid(current); |
2532386f | 2740 | audit_info.sessionid = audit_get_sessionid(current); |
161a09e7 | 2741 | audit_info.secid = 0; |
07fb0f17 | 2742 | err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info); |
8be987d7 | 2743 | err2 = unicast_flush_resp(sk, hdr); |
2f1eb65f JHS |
2744 | if (err || err2) { |
2745 | if (err == -ESRCH) /* empty table - old silent behavior */ | |
2746 | return 0; | |
2747 | return err; | |
2748 | } | |
8be987d7 | 2749 | |
f7b6983f | 2750 | c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f | 2751 | c.event = XFRM_MSG_FLUSHPOLICY; |
15e47304 | 2752 | c.portid = hdr->sadb_msg_pid; |
26b15dad | 2753 | c.seq = hdr->sadb_msg_seq; |
07fb0f17 | 2754 | c.net = net; |
26b15dad | 2755 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
2756 | |
2757 | return 0; | |
2758 | } | |
2759 | ||
2760 | typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, | |
4c93fbb0 | 2761 | const struct sadb_msg *hdr, void * const *ext_hdrs); |
8603b955 | 2762 | static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
1da177e4 LT |
2763 | [SADB_RESERVED] = pfkey_reserved, |
2764 | [SADB_GETSPI] = pfkey_getspi, | |
2765 | [SADB_UPDATE] = pfkey_add, | |
2766 | [SADB_ADD] = pfkey_add, | |
2767 | [SADB_DELETE] = pfkey_delete, | |
2768 | [SADB_GET] = pfkey_get, | |
2769 | [SADB_ACQUIRE] = pfkey_acquire, | |
2770 | [SADB_REGISTER] = pfkey_register, | |
2771 | [SADB_EXPIRE] = NULL, | |
2772 | [SADB_FLUSH] = pfkey_flush, | |
2773 | [SADB_DUMP] = pfkey_dump, | |
2774 | [SADB_X_PROMISC] = pfkey_promisc, | |
2775 | [SADB_X_PCHANGE] = NULL, | |
2776 | [SADB_X_SPDUPDATE] = pfkey_spdadd, | |
2777 | [SADB_X_SPDADD] = pfkey_spdadd, | |
2778 | [SADB_X_SPDDELETE] = pfkey_spddelete, | |
2779 | [SADB_X_SPDGET] = pfkey_spdget, | |
2780 | [SADB_X_SPDACQUIRE] = NULL, | |
2781 | [SADB_X_SPDDUMP] = pfkey_spddump, | |
2782 | [SADB_X_SPDFLUSH] = pfkey_spdflush, | |
2783 | [SADB_X_SPDSETIDX] = pfkey_spdadd, | |
2784 | [SADB_X_SPDDELETE2] = pfkey_spdget, | |
08de61be | 2785 | [SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4 LT |
2786 | }; |
2787 | ||
4c93fbb0 | 2788 | static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr) |
1da177e4 LT |
2789 | { |
2790 | void *ext_hdrs[SADB_EXT_MAX]; | |
2791 | int err; | |
2792 | ||
2793 | pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, | |
07fb0f17 | 2794 | BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
1da177e4 LT |
2795 | |
2796 | memset(ext_hdrs, 0, sizeof(ext_hdrs)); | |
2797 | err = parse_exthdrs(skb, hdr, ext_hdrs); | |
2798 | if (!err) { | |
2799 | err = -EOPNOTSUPP; | |
2800 | if (pfkey_funcs[hdr->sadb_msg_type]) | |
2801 | err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs); | |
2802 | } | |
2803 | return err; | |
2804 | } | |
2805 | ||
2806 | static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp) | |
2807 | { | |
2808 | struct sadb_msg *hdr = NULL; | |
2809 | ||
2810 | if (skb->len < sizeof(*hdr)) { | |
2811 | *errp = -EMSGSIZE; | |
2812 | } else { | |
2813 | hdr = (struct sadb_msg *) skb->data; | |
2814 | if (hdr->sadb_msg_version != PF_KEY_V2 || | |
2815 | hdr->sadb_msg_reserved != 0 || | |
2816 | (hdr->sadb_msg_type <= SADB_RESERVED || | |
2817 | hdr->sadb_msg_type > SADB_MAX)) { | |
2818 | hdr = NULL; | |
2819 | *errp = -EINVAL; | |
2820 | } else if (hdr->sadb_msg_len != (skb->len / | |
2821 | sizeof(uint64_t)) || | |
2822 | hdr->sadb_msg_len < (sizeof(struct sadb_msg) / | |
2823 | sizeof(uint64_t))) { | |
2824 | hdr = NULL; | |
2825 | *errp = -EMSGSIZE; | |
2826 | } else { | |
2827 | *errp = 0; | |
2828 | } | |
2829 | } | |
2830 | return hdr; | |
2831 | } | |
2832 | ||
4c93fbb0 DM |
2833 | static inline int aalg_tmpl_set(const struct xfrm_tmpl *t, |
2834 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2835 | { |
f398035f HX |
2836 | unsigned int id = d->desc.sadb_alg_id; |
2837 | ||
2838 | if (id >= sizeof(t->aalgos) * 8) | |
2839 | return 0; | |
2840 | ||
2841 | return (t->aalgos >> id) & 1; | |
1da177e4 LT |
2842 | } |
2843 | ||
4c93fbb0 DM |
2844 | static inline int ealg_tmpl_set(const struct xfrm_tmpl *t, |
2845 | const struct xfrm_algo_desc *d) | |
1da177e4 | 2846 | { |
f398035f HX |
2847 | unsigned int id = d->desc.sadb_alg_id; |
2848 | ||
2849 | if (id >= sizeof(t->ealgos) * 8) | |
2850 | return 0; | |
2851 | ||
2852 | return (t->ealgos >> id) & 1; | |
1da177e4 LT |
2853 | } |
2854 | ||
4c93fbb0 | 2855 | static int count_ah_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2856 | { |
2857 | int i, sz = 0; | |
2858 | ||
2859 | for (i = 0; ; i++) { | |
4c93fbb0 | 2860 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2861 | if (!aalg) |
2862 | break; | |
7e50f84c JK |
2863 | if (!aalg->pfkey_supported) |
2864 | continue; | |
1da177e4 LT |
2865 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2866 | sz += sizeof(struct sadb_comb); | |
2867 | } | |
2868 | return sz + sizeof(struct sadb_prop); | |
2869 | } | |
2870 | ||
4c93fbb0 | 2871 | static int count_esp_combs(const struct xfrm_tmpl *t) |
1da177e4 LT |
2872 | { |
2873 | int i, k, sz = 0; | |
2874 | ||
2875 | for (i = 0; ; i++) { | |
4c93fbb0 | 2876 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2877 | if (!ealg) |
2878 | break; | |
8ff24541 | 2879 | |
7e50f84c JK |
2880 | if (!ealg->pfkey_supported) |
2881 | continue; | |
2882 | ||
1da177e4 LT |
2883 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2884 | continue; | |
8ff24541 | 2885 | |
1da177e4 | 2886 | for (k = 1; ; k++) { |
4c93fbb0 | 2887 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2888 | if (!aalg) |
2889 | break; | |
8ff24541 | 2890 | |
7e50f84c JK |
2891 | if (!aalg->pfkey_supported) |
2892 | continue; | |
2893 | ||
1da177e4 LT |
2894 | if (aalg_tmpl_set(t, aalg) && aalg->available) |
2895 | sz += sizeof(struct sadb_comb); | |
2896 | } | |
2897 | } | |
2898 | return sz + sizeof(struct sadb_prop); | |
2899 | } | |
2900 | ||
4c93fbb0 | 2901 | static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2902 | { |
2903 | struct sadb_prop *p; | |
2904 | int i; | |
2905 | ||
2906 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2907 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2908 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2909 | p->sadb_prop_replay = 32; | |
2910 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2911 | ||
2912 | for (i = 0; ; i++) { | |
4c93fbb0 | 2913 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4 LT |
2914 | if (!aalg) |
2915 | break; | |
2916 | ||
7e50f84c JK |
2917 | if (!aalg->pfkey_supported) |
2918 | continue; | |
2919 | ||
1da177e4 LT |
2920 | if (aalg_tmpl_set(t, aalg) && aalg->available) { |
2921 | struct sadb_comb *c; | |
2922 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2923 | memset(c, 0, sizeof(*c)); | |
2924 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2925 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2926 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2927 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2928 | c->sadb_comb_hard_addtime = 24*60*60; | |
2929 | c->sadb_comb_soft_addtime = 20*60*60; | |
2930 | c->sadb_comb_hard_usetime = 8*60*60; | |
2931 | c->sadb_comb_soft_usetime = 7*60*60; | |
2932 | } | |
2933 | } | |
2934 | } | |
2935 | ||
4c93fbb0 | 2936 | static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4 LT |
2937 | { |
2938 | struct sadb_prop *p; | |
2939 | int i, k; | |
2940 | ||
2941 | p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop)); | |
2942 | p->sadb_prop_len = sizeof(struct sadb_prop)/8; | |
2943 | p->sadb_prop_exttype = SADB_EXT_PROPOSAL; | |
2944 | p->sadb_prop_replay = 32; | |
2945 | memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved)); | |
2946 | ||
2947 | for (i=0; ; i++) { | |
4c93fbb0 | 2948 | const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4 LT |
2949 | if (!ealg) |
2950 | break; | |
8ff24541 | 2951 | |
7e50f84c JK |
2952 | if (!ealg->pfkey_supported) |
2953 | continue; | |
2954 | ||
1da177e4 LT |
2955 | if (!(ealg_tmpl_set(t, ealg) && ealg->available)) |
2956 | continue; | |
8ff24541 | 2957 | |
1da177e4 LT |
2958 | for (k = 1; ; k++) { |
2959 | struct sadb_comb *c; | |
4c93fbb0 | 2960 | const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4 LT |
2961 | if (!aalg) |
2962 | break; | |
7e50f84c JK |
2963 | if (!aalg->pfkey_supported) |
2964 | continue; | |
1da177e4 LT |
2965 | if (!(aalg_tmpl_set(t, aalg) && aalg->available)) |
2966 | continue; | |
2967 | c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); | |
2968 | memset(c, 0, sizeof(*c)); | |
2969 | p->sadb_prop_len += sizeof(struct sadb_comb)/8; | |
2970 | c->sadb_comb_auth = aalg->desc.sadb_alg_id; | |
2971 | c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits; | |
2972 | c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits; | |
2973 | c->sadb_comb_encrypt = ealg->desc.sadb_alg_id; | |
2974 | c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits; | |
2975 | c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits; | |
2976 | c->sadb_comb_hard_addtime = 24*60*60; | |
2977 | c->sadb_comb_soft_addtime = 20*60*60; | |
2978 | c->sadb_comb_hard_usetime = 8*60*60; | |
2979 | c->sadb_comb_soft_usetime = 7*60*60; | |
2980 | } | |
2981 | } | |
2982 | } | |
2983 | ||
214e005b | 2984 | static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c) |
26b15dad JHS |
2985 | { |
2986 | return 0; | |
2987 | } | |
2988 | ||
214e005b | 2989 | static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2990 | { |
2991 | struct sk_buff *out_skb; | |
2992 | struct sadb_msg *out_hdr; | |
26b15dad JHS |
2993 | int hard; |
2994 | int hsc; | |
2995 | ||
bf08867f | 2996 | hard = c->data.hard; |
26b15dad JHS |
2997 | if (hard) |
2998 | hsc = 2; | |
2999 | else | |
3000 | hsc = 1; | |
1da177e4 | 3001 | |
050f009e | 3002 | out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4 LT |
3003 | if (IS_ERR(out_skb)) |
3004 | return PTR_ERR(out_skb); | |
3005 | ||
3006 | out_hdr = (struct sadb_msg *) out_skb->data; | |
3007 | out_hdr->sadb_msg_version = PF_KEY_V2; | |
3008 | out_hdr->sadb_msg_type = SADB_EXPIRE; | |
3009 | out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3010 | out_hdr->sadb_msg_errno = 0; | |
3011 | out_hdr->sadb_msg_reserved = 0; | |
3012 | out_hdr->sadb_msg_seq = 0; | |
3013 | out_hdr->sadb_msg_pid = 0; | |
3014 | ||
07fb0f17 | 3015 | pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
3016 | return 0; |
3017 | } | |
3018 | ||
214e005b | 3019 | static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 3020 | { |
07fb0f17 | 3021 | struct net *net = x ? xs_net(x) : c->net; |
3fa87a32 AD |
3022 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3023 | ||
3024 | if (atomic_read(&net_pfkey->socks_nr) == 0) | |
99c6f60e JHS |
3025 | return 0; |
3026 | ||
26b15dad | 3027 | switch (c->event) { |
f60f6b8f | 3028 | case XFRM_MSG_EXPIRE: |
26b15dad | 3029 | return key_notify_sa_expire(x, c); |
f60f6b8f HX |
3030 | case XFRM_MSG_DELSA: |
3031 | case XFRM_MSG_NEWSA: | |
3032 | case XFRM_MSG_UPDSA: | |
26b15dad | 3033 | return key_notify_sa(x, c); |
f60f6b8f | 3034 | case XFRM_MSG_FLUSHSA: |
26b15dad | 3035 | return key_notify_sa_flush(c); |
d51d081d JHS |
3036 | case XFRM_MSG_NEWAE: /* not yet supported */ |
3037 | break; | |
26b15dad | 3038 | default: |
207024b9 | 3039 | pr_err("pfkey: Unknown SA event %d\n", c->event); |
26b15dad JHS |
3040 | break; |
3041 | } | |
3042 | ||
3043 | return 0; | |
3044 | } | |
3045 | ||
214e005b | 3046 | static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 3047 | { |
f7b6983f MN |
3048 | if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) |
3049 | return 0; | |
3050 | ||
26b15dad | 3051 | switch (c->event) { |
f60f6b8f | 3052 | case XFRM_MSG_POLEXPIRE: |
26b15dad | 3053 | return key_notify_policy_expire(xp, c); |
f60f6b8f HX |
3054 | case XFRM_MSG_DELPOLICY: |
3055 | case XFRM_MSG_NEWPOLICY: | |
3056 | case XFRM_MSG_UPDPOLICY: | |
26b15dad | 3057 | return key_notify_policy(xp, dir, c); |
f60f6b8f | 3058 | case XFRM_MSG_FLUSHPOLICY: |
f7b6983f MN |
3059 | if (c->data.type != XFRM_POLICY_TYPE_MAIN) |
3060 | break; | |
26b15dad JHS |
3061 | return key_notify_policy_flush(c); |
3062 | default: | |
207024b9 | 3063 | pr_err("pfkey: Unknown policy event %d\n", c->event); |
26b15dad JHS |
3064 | break; |
3065 | } | |
3066 | ||
3067 | return 0; | |
3068 | } | |
3069 | ||
1da177e4 LT |
3070 | static u32 get_acqseq(void) |
3071 | { | |
3072 | u32 res; | |
28aecb9d | 3073 | static atomic_t acqseq; |
1da177e4 | 3074 | |
28aecb9d ED |
3075 | do { |
3076 | res = atomic_inc_return(&acqseq); | |
3077 | } while (!res); | |
1da177e4 LT |
3078 | return res; |
3079 | } | |
3080 | ||
0f24558e HG |
3081 | static bool pfkey_is_alive(const struct km_event *c) |
3082 | { | |
3083 | struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id); | |
3084 | struct sock *sk; | |
3085 | bool is_alive = false; | |
3086 | ||
3087 | rcu_read_lock(); | |
3088 | sk_for_each_rcu(sk, &net_pfkey->table) { | |
3089 | if (pfkey_sk(sk)->registered) { | |
3090 | is_alive = true; | |
3091 | break; | |
3092 | } | |
3093 | } | |
3094 | rcu_read_unlock(); | |
3095 | ||
3096 | return is_alive; | |
3097 | } | |
3098 | ||
65e0736b | 3099 | static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp) |
1da177e4 LT |
3100 | { |
3101 | struct sk_buff *skb; | |
3102 | struct sadb_msg *hdr; | |
3103 | struct sadb_address *addr; | |
3104 | struct sadb_x_policy *pol; | |
1da177e4 LT |
3105 | int sockaddr_size; |
3106 | int size; | |
4e2ba18e VY |
3107 | struct sadb_x_sec_ctx *sec_ctx; |
3108 | struct xfrm_sec_ctx *xfrm_ctx; | |
3109 | int ctx_size = 0; | |
8ff24541 | 3110 | |
1da177e4 LT |
3111 | sockaddr_size = pfkey_sockaddr_size(x->props.family); |
3112 | if (!sockaddr_size) | |
3113 | return -EINVAL; | |
3114 | ||
3115 | size = sizeof(struct sadb_msg) + | |
3116 | (sizeof(struct sadb_address) * 2) + | |
3117 | (sockaddr_size * 2) + | |
3118 | sizeof(struct sadb_x_policy); | |
8ff24541 | 3119 | |
1da177e4 LT |
3120 | if (x->id.proto == IPPROTO_AH) |
3121 | size += count_ah_combs(t); | |
3122 | else if (x->id.proto == IPPROTO_ESP) | |
3123 | size += count_esp_combs(t); | |
3124 | ||
4e2ba18e VY |
3125 | if ((xfrm_ctx = x->security)) { |
3126 | ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); | |
3127 | size += sizeof(struct sadb_x_sec_ctx) + ctx_size; | |
3128 | } | |
3129 | ||
1da177e4 LT |
3130 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3131 | if (skb == NULL) | |
3132 | return -ENOMEM; | |
8ff24541 | 3133 | |
1da177e4 LT |
3134 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3135 | hdr->sadb_msg_version = PF_KEY_V2; | |
3136 | hdr->sadb_msg_type = SADB_ACQUIRE; | |
3137 | hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto); | |
3138 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3139 | hdr->sadb_msg_errno = 0; | |
3140 | hdr->sadb_msg_reserved = 0; | |
3141 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3142 | hdr->sadb_msg_pid = 0; | |
3143 | ||
3144 | /* src address */ | |
8ff24541 | 3145 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 | 3146 | sizeof(struct sadb_address)+sockaddr_size); |
8ff24541 | 3147 | addr->sadb_address_len = |
1da177e4 LT |
3148 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3149 | sizeof(uint64_t); | |
3150 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3151 | addr->sadb_address_proto = 0; | |
3152 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3153 | addr->sadb_address_prefixlen = |
3154 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3155 | (struct sockaddr *) (addr + 1), | |
3156 | x->props.family); | |
3157 | if (!addr->sadb_address_prefixlen) | |
1da177e4 | 3158 | BUG(); |
8ff24541 | 3159 | |
1da177e4 | 3160 | /* dst address */ |
8ff24541 | 3161 | addr = (struct sadb_address*) skb_put(skb, |
1da177e4 LT |
3162 | sizeof(struct sadb_address)+sockaddr_size); |
3163 | addr->sadb_address_len = | |
3164 | (sizeof(struct sadb_address)+sockaddr_size)/ | |
3165 | sizeof(uint64_t); | |
3166 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3167 | addr->sadb_address_proto = 0; | |
3168 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3169 | addr->sadb_address_prefixlen = |
3170 | pfkey_sockaddr_fill(&x->id.daddr, 0, | |
3171 | (struct sockaddr *) (addr + 1), | |
3172 | x->props.family); | |
3173 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3174 | BUG(); |
3175 | ||
3176 | pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy)); | |
3177 | pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t); | |
3178 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3179 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
65e0736b | 3180 | pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1; |
ff862a46 | 3181 | pol->sadb_x_policy_reserved = 0; |
1da177e4 | 3182 | pol->sadb_x_policy_id = xp->index; |
ff862a46 | 3183 | pol->sadb_x_policy_priority = xp->priority; |
1da177e4 LT |
3184 | |
3185 | /* Set sadb_comb's. */ | |
3186 | if (x->id.proto == IPPROTO_AH) | |
3187 | dump_ah_combs(skb, t); | |
3188 | else if (x->id.proto == IPPROTO_ESP) | |
3189 | dump_esp_combs(skb, t); | |
3190 | ||
4e2ba18e VY |
3191 | /* security context */ |
3192 | if (xfrm_ctx) { | |
3193 | sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, | |
3194 | sizeof(struct sadb_x_sec_ctx) + ctx_size); | |
3195 | sec_ctx->sadb_x_sec_len = | |
3196 | (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t); | |
3197 | sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX; | |
3198 | sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi; | |
3199 | sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg; | |
3200 | sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len; | |
3201 | memcpy(sec_ctx + 1, xfrm_ctx->ctx_str, | |
3202 | xfrm_ctx->ctx_len); | |
3203 | } | |
3204 | ||
07fb0f17 | 3205 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
3206 | } |
3207 | ||
cb969f07 | 3208 | static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541 | 3209 | u8 *data, int len, int *dir) |
1da177e4 | 3210 | { |
07fb0f17 | 3211 | struct net *net = sock_net(sk); |
1da177e4 LT |
3212 | struct xfrm_policy *xp; |
3213 | struct sadb_x_policy *pol = (struct sadb_x_policy*)data; | |
df71837d | 3214 | struct sadb_x_sec_ctx *sec_ctx; |
1da177e4 | 3215 | |
cb969f07 | 3216 | switch (sk->sk_family) { |
1da177e4 LT |
3217 | case AF_INET: |
3218 | if (opt != IP_IPSEC_POLICY) { | |
3219 | *dir = -EOPNOTSUPP; | |
3220 | return NULL; | |
3221 | } | |
3222 | break; | |
dfd56b8b | 3223 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
3224 | case AF_INET6: |
3225 | if (opt != IPV6_IPSEC_POLICY) { | |
3226 | *dir = -EOPNOTSUPP; | |
3227 | return NULL; | |
3228 | } | |
3229 | break; | |
3230 | #endif | |
3231 | default: | |
3232 | *dir = -EINVAL; | |
3233 | return NULL; | |
3234 | } | |
3235 | ||
3236 | *dir = -EINVAL; | |
3237 | ||
3238 | if (len < sizeof(struct sadb_x_policy) || | |
3239 | pol->sadb_x_policy_len*8 > len || | |
3240 | pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS || | |
3241 | (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND)) | |
3242 | return NULL; | |
3243 | ||
07fb0f17 | 3244 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
3245 | if (xp == NULL) { |
3246 | *dir = -ENOBUFS; | |
3247 | return NULL; | |
3248 | } | |
3249 | ||
3250 | xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ? | |
3251 | XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW); | |
3252 | ||
3253 | xp->lft.soft_byte_limit = XFRM_INF; | |
3254 | xp->lft.hard_byte_limit = XFRM_INF; | |
3255 | xp->lft.soft_packet_limit = XFRM_INF; | |
3256 | xp->lft.hard_packet_limit = XFRM_INF; | |
cb969f07 | 3257 | xp->family = sk->sk_family; |
1da177e4 LT |
3258 | |
3259 | xp->xfrm_nr = 0; | |
3260 | if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && | |
3261 | (*dir = parse_ipsecrequests(xp, pol)) < 0) | |
3262 | goto out; | |
3263 | ||
df71837d TJ |
3264 | /* security context too */ |
3265 | if (len >= (pol->sadb_x_policy_len*8 + | |
3266 | sizeof(struct sadb_x_sec_ctx))) { | |
3267 | char *p = (char *)pol; | |
3268 | struct xfrm_user_sec_ctx *uctx; | |
3269 | ||
3270 | p += pol->sadb_x_policy_len*8; | |
3271 | sec_ctx = (struct sadb_x_sec_ctx *)p; | |
3272 | if (len < pol->sadb_x_policy_len*8 + | |
cb969f07 VY |
3273 | sec_ctx->sadb_x_sec_len) { |
3274 | *dir = -EINVAL; | |
df71837d | 3275 | goto out; |
cb969f07 | 3276 | } |
df71837d TJ |
3277 | if ((*dir = verify_sec_ctx_len(p))) |
3278 | goto out; | |
87536a81 | 3279 | uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC); |
52a4c640 | 3280 | *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC); |
df71837d TJ |
3281 | kfree(uctx); |
3282 | ||
3283 | if (*dir) | |
3284 | goto out; | |
3285 | } | |
3286 | ||
1da177e4 LT |
3287 | *dir = pol->sadb_x_policy_dir-1; |
3288 | return xp; | |
3289 | ||
3290 | out: | |
70e90679 | 3291 | xp->walk.dead = 1; |
64c31b3f | 3292 | xfrm_policy_destroy(xp); |
1da177e4 LT |
3293 | return NULL; |
3294 | } | |
3295 | ||
5d36b180 | 3296 | static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
3297 | { |
3298 | struct sk_buff *skb; | |
3299 | struct sadb_msg *hdr; | |
3300 | struct sadb_sa *sa; | |
3301 | struct sadb_address *addr; | |
3302 | struct sadb_x_nat_t_port *n_port; | |
1da177e4 LT |
3303 | int sockaddr_size; |
3304 | int size; | |
3305 | __u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0); | |
3306 | struct xfrm_encap_tmpl *natt = NULL; | |
3307 | ||
3308 | sockaddr_size = pfkey_sockaddr_size(x->props.family); | |
3309 | if (!sockaddr_size) | |
3310 | return -EINVAL; | |
3311 | ||
3312 | if (!satype) | |
3313 | return -EINVAL; | |
3314 | ||
3315 | if (!x->encap) | |
3316 | return -EINVAL; | |
3317 | ||
3318 | natt = x->encap; | |
3319 | ||
3320 | /* Build an SADB_X_NAT_T_NEW_MAPPING message: | |
3321 | * | |
3322 | * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) | | |
3323 | * ADDRESS_DST (new addr) | NAT_T_DPORT (new port) | |
3324 | */ | |
8ff24541 | 3325 | |
1da177e4 LT |
3326 | size = sizeof(struct sadb_msg) + |
3327 | sizeof(struct sadb_sa) + | |
3328 | (sizeof(struct sadb_address) * 2) + | |
3329 | (sockaddr_size * 2) + | |
3330 | (sizeof(struct sadb_x_nat_t_port) * 2); | |
8ff24541 | 3331 | |
1da177e4 LT |
3332 | skb = alloc_skb(size + 16, GFP_ATOMIC); |
3333 | if (skb == NULL) | |
3334 | return -ENOMEM; | |
8ff24541 | 3335 | |
1da177e4 LT |
3336 | hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); |
3337 | hdr->sadb_msg_version = PF_KEY_V2; | |
3338 | hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING; | |
3339 | hdr->sadb_msg_satype = satype; | |
3340 | hdr->sadb_msg_len = size / sizeof(uint64_t); | |
3341 | hdr->sadb_msg_errno = 0; | |
3342 | hdr->sadb_msg_reserved = 0; | |
3343 | hdr->sadb_msg_seq = x->km.seq = get_acqseq(); | |
3344 | hdr->sadb_msg_pid = 0; | |
3345 | ||
3346 | /* SA */ | |
3347 | sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa)); | |
3348 | sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t); | |
3349 | sa->sadb_sa_exttype = SADB_EXT_SA; | |
3350 | sa->sadb_sa_spi = x->id.spi; | |
3351 | sa->sadb_sa_replay = 0; | |
3352 | sa->sadb_sa_state = 0; | |
3353 | sa->sadb_sa_auth = 0; | |
3354 | sa->sadb_sa_encrypt = 0; | |
3355 | sa->sadb_sa_flags = 0; | |
3356 | ||
3357 | /* ADDRESS_SRC (old addr) */ | |
3358 | addr = (struct sadb_address*) | |
3359 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3360 | addr->sadb_address_len = |
1da177e4 LT |
3361 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3362 | sizeof(uint64_t); | |
3363 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; | |
3364 | addr->sadb_address_proto = 0; | |
3365 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3366 | addr->sadb_address_prefixlen = |
3367 | pfkey_sockaddr_fill(&x->props.saddr, 0, | |
3368 | (struct sockaddr *) (addr + 1), | |
3369 | x->props.family); | |
3370 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3371 | BUG(); |
3372 | ||
3373 | /* NAT_T_SPORT (old port) */ | |
3374 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3375 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3376 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT; | |
3377 | n_port->sadb_x_nat_t_port_port = natt->encap_sport; | |
3378 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3379 | ||
3380 | /* ADDRESS_DST (new addr) */ | |
3381 | addr = (struct sadb_address*) | |
3382 | skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); | |
8ff24541 | 3383 | addr->sadb_address_len = |
1da177e4 LT |
3384 | (sizeof(struct sadb_address)+sockaddr_size)/ |
3385 | sizeof(uint64_t); | |
3386 | addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; | |
3387 | addr->sadb_address_proto = 0; | |
3388 | addr->sadb_address_reserved = 0; | |
e5b56652 YH |
3389 | addr->sadb_address_prefixlen = |
3390 | pfkey_sockaddr_fill(ipaddr, 0, | |
3391 | (struct sockaddr *) (addr + 1), | |
3392 | x->props.family); | |
3393 | if (!addr->sadb_address_prefixlen) | |
1da177e4 LT |
3394 | BUG(); |
3395 | ||
3396 | /* NAT_T_DPORT (new port) */ | |
3397 | n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port)); | |
3398 | n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t); | |
3399 | n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT; | |
3400 | n_port->sadb_x_nat_t_port_port = sport; | |
3401 | n_port->sadb_x_nat_t_port_reserved = 0; | |
3402 | ||
07fb0f17 | 3403 | return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4 LT |
3404 | } |
3405 | ||
08de61be SS |
3406 | #ifdef CONFIG_NET_KEY_MIGRATE |
3407 | static int set_sadb_address(struct sk_buff *skb, int sasize, int type, | |
183cad12 | 3408 | const struct xfrm_selector *sel) |
08de61be SS |
3409 | { |
3410 | struct sadb_address *addr; | |
08de61be SS |
3411 | addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize); |
3412 | addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8; | |
3413 | addr->sadb_address_exttype = type; | |
3414 | addr->sadb_address_proto = sel->proto; | |
3415 | addr->sadb_address_reserved = 0; | |
3416 | ||
3417 | switch (type) { | |
3418 | case SADB_EXT_ADDRESS_SRC: | |
e5b56652 YH |
3419 | addr->sadb_address_prefixlen = sel->prefixlen_s; |
3420 | pfkey_sockaddr_fill(&sel->saddr, 0, | |
3421 | (struct sockaddr *)(addr + 1), | |
3422 | sel->family); | |
08de61be SS |
3423 | break; |
3424 | case SADB_EXT_ADDRESS_DST: | |
e5b56652 YH |
3425 | addr->sadb_address_prefixlen = sel->prefixlen_d; |
3426 | pfkey_sockaddr_fill(&sel->daddr, 0, | |
3427 | (struct sockaddr *)(addr + 1), | |
3428 | sel->family); | |
08de61be SS |
3429 | break; |
3430 | default: | |
3431 | return -EINVAL; | |
3432 | } | |
3433 | ||
3434 | return 0; | |
3435 | } | |
3436 | ||
13c1d189 | 3437 | |
183cad12 | 3438 | static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k) |
13c1d189 AE |
3439 | { |
3440 | struct sadb_x_kmaddress *kma; | |
3441 | u8 *sa; | |
3442 | int family = k->family; | |
3443 | int socklen = pfkey_sockaddr_len(family); | |
3444 | int size_req; | |
3445 | ||
3446 | size_req = (sizeof(struct sadb_x_kmaddress) + | |
3447 | pfkey_sockaddr_pair_size(family)); | |
3448 | ||
3449 | kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req); | |
3450 | memset(kma, 0, size_req); | |
3451 | kma->sadb_x_kmaddress_len = size_req / 8; | |
3452 | kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS; | |
3453 | kma->sadb_x_kmaddress_reserved = k->reserved; | |
3454 | ||
3455 | sa = (u8 *)(kma + 1); | |
3456 | if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) || | |
3457 | !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family)) | |
3458 | return -EINVAL; | |
3459 | ||
3460 | return 0; | |
3461 | } | |
3462 | ||
08de61be SS |
3463 | static int set_ipsecrequest(struct sk_buff *skb, |
3464 | uint8_t proto, uint8_t mode, int level, | |
3465 | uint32_t reqid, uint8_t family, | |
183cad12 | 3466 | const xfrm_address_t *src, const xfrm_address_t *dst) |
08de61be SS |
3467 | { |
3468 | struct sadb_x_ipsecrequest *rq; | |
e5b56652 YH |
3469 | u8 *sa; |
3470 | int socklen = pfkey_sockaddr_len(family); | |
08de61be SS |
3471 | int size_req; |
3472 | ||
3473 | size_req = sizeof(struct sadb_x_ipsecrequest) + | |
3474 | pfkey_sockaddr_pair_size(family); | |
3475 | ||
3476 | rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req); | |
3477 | memset(rq, 0, size_req); | |
3478 | rq->sadb_x_ipsecrequest_len = size_req; | |
3479 | rq->sadb_x_ipsecrequest_proto = proto; | |
3480 | rq->sadb_x_ipsecrequest_mode = mode; | |
3481 | rq->sadb_x_ipsecrequest_level = level; | |
3482 | rq->sadb_x_ipsecrequest_reqid = reqid; | |
3483 | ||
e5b56652 YH |
3484 | sa = (u8 *) (rq + 1); |
3485 | if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || | |
3486 | !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) | |
08de61be | 3487 | return -EINVAL; |
08de61be SS |
3488 | |
3489 | return 0; | |
3490 | } | |
3491 | #endif | |
3492 | ||
3493 | #ifdef CONFIG_NET_KEY_MIGRATE | |
183cad12 DM |
3494 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3495 | const struct xfrm_migrate *m, int num_bundles, | |
3496 | const struct xfrm_kmaddress *k) | |
08de61be SS |
3497 | { |
3498 | int i; | |
3499 | int sasize_sel; | |
3500 | int size = 0; | |
3501 | int size_pol = 0; | |
3502 | struct sk_buff *skb; | |
3503 | struct sadb_msg *hdr; | |
3504 | struct sadb_x_policy *pol; | |
183cad12 | 3505 | const struct xfrm_migrate *mp; |
08de61be SS |
3506 | |
3507 | if (type != XFRM_POLICY_TYPE_MAIN) | |
3508 | return 0; | |
3509 | ||
3510 | if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) | |
3511 | return -EINVAL; | |
3512 | ||
13c1d189 AE |
3513 | if (k != NULL) { |
3514 | /* addresses for KM */ | |
3515 | size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + | |
3516 | pfkey_sockaddr_pair_size(k->family)); | |
3517 | } | |
3518 | ||
08de61be SS |
3519 | /* selector */ |
3520 | sasize_sel = pfkey_sockaddr_size(sel->family); | |
3521 | if (!sasize_sel) | |
3522 | return -EINVAL; | |
3523 | size += (sizeof(struct sadb_address) + sasize_sel) * 2; | |
3524 | ||
3525 | /* policy info */ | |
3526 | size_pol += sizeof(struct sadb_x_policy); | |
3527 | ||
3528 | /* ipsecrequests */ | |
3529 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3530 | /* old locator pair */ | |
3531 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3532 | pfkey_sockaddr_pair_size(mp->old_family); | |
3533 | /* new locator pair */ | |
3534 | size_pol += sizeof(struct sadb_x_ipsecrequest) + | |
3535 | pfkey_sockaddr_pair_size(mp->new_family); | |
3536 | } | |
3537 | ||
3538 | size += sizeof(struct sadb_msg) + size_pol; | |
3539 | ||
3540 | /* alloc buffer */ | |
3541 | skb = alloc_skb(size, GFP_ATOMIC); | |
3542 | if (skb == NULL) | |
3543 | return -ENOMEM; | |
3544 | ||
3545 | hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg)); | |
3546 | hdr->sadb_msg_version = PF_KEY_V2; | |
3547 | hdr->sadb_msg_type = SADB_X_MIGRATE; | |
3548 | hdr->sadb_msg_satype = pfkey_proto2satype(m->proto); | |
3549 | hdr->sadb_msg_len = size / 8; | |
3550 | hdr->sadb_msg_errno = 0; | |
3551 | hdr->sadb_msg_reserved = 0; | |
3552 | hdr->sadb_msg_seq = 0; | |
3553 | hdr->sadb_msg_pid = 0; | |
3554 | ||
13c1d189 AE |
3555 | /* Addresses to be used by KM for negotiation, if ext is available */ |
3556 | if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) | |
89eb06f1 | 3557 | goto err; |
13c1d189 | 3558 | |
08de61be SS |
3559 | /* selector src */ |
3560 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel); | |
3561 | ||
3562 | /* selector dst */ | |
3563 | set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel); | |
3564 | ||
3565 | /* policy information */ | |
3566 | pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy)); | |
3567 | pol->sadb_x_policy_len = size_pol / 8; | |
3568 | pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY; | |
3569 | pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC; | |
3570 | pol->sadb_x_policy_dir = dir + 1; | |
ff862a46 | 3571 | pol->sadb_x_policy_reserved = 0; |
08de61be SS |
3572 | pol->sadb_x_policy_id = 0; |
3573 | pol->sadb_x_policy_priority = 0; | |
3574 | ||
3575 | for (i = 0, mp = m; i < num_bundles; i++, mp++) { | |
3576 | /* old ipsecrequest */ | |
55569ce2 KM |
3577 | int mode = pfkey_mode_from_xfrm(mp->mode); |
3578 | if (mode < 0) | |
d4782c32 | 3579 | goto err; |
55569ce2 | 3580 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3581 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3582 | mp->reqid, mp->old_family, | |
d4782c32 PM |
3583 | &mp->old_saddr, &mp->old_daddr) < 0) |
3584 | goto err; | |
08de61be SS |
3585 | |
3586 | /* new ipsecrequest */ | |
55569ce2 | 3587 | if (set_ipsecrequest(skb, mp->proto, mode, |
08de61be SS |
3588 | (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), |
3589 | mp->reqid, mp->new_family, | |
d4782c32 PM |
3590 | &mp->new_saddr, &mp->new_daddr) < 0) |
3591 | goto err; | |
08de61be SS |
3592 | } |
3593 | ||
3594 | /* broadcast migrate message to sockets */ | |
07fb0f17 | 3595 | pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61be SS |
3596 | |
3597 | return 0; | |
d4782c32 PM |
3598 | |
3599 | err: | |
3600 | kfree_skb(skb); | |
3601 | return -EINVAL; | |
08de61be SS |
3602 | } |
3603 | #else | |
183cad12 DM |
3604 | static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
3605 | const struct xfrm_migrate *m, int num_bundles, | |
3606 | const struct xfrm_kmaddress *k) | |
08de61be SS |
3607 | { |
3608 | return -ENOPROTOOPT; | |
3609 | } | |
3610 | #endif | |
3611 | ||
1da177e4 LT |
3612 | static int pfkey_sendmsg(struct kiocb *kiocb, |
3613 | struct socket *sock, struct msghdr *msg, size_t len) | |
3614 | { | |
3615 | struct sock *sk = sock->sk; | |
3616 | struct sk_buff *skb = NULL; | |
3617 | struct sadb_msg *hdr = NULL; | |
3618 | int err; | |
283bc9f3 | 3619 | struct net *net = sock_net(sk); |
1da177e4 LT |
3620 | |
3621 | err = -EOPNOTSUPP; | |
3622 | if (msg->msg_flags & MSG_OOB) | |
3623 | goto out; | |
3624 | ||
3625 | err = -EMSGSIZE; | |
95c96174 | 3626 | if ((unsigned int)len > sk->sk_sndbuf - 32) |
1da177e4 LT |
3627 | goto out; |
3628 | ||
3629 | err = -ENOBUFS; | |
3630 | skb = alloc_skb(len, GFP_KERNEL); | |
3631 | if (skb == NULL) | |
3632 | goto out; | |
3633 | ||
3634 | err = -EFAULT; | |
3635 | if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) | |
3636 | goto out; | |
3637 | ||
3638 | hdr = pfkey_get_base_msg(skb, &err); | |
3639 | if (!hdr) | |
3640 | goto out; | |
3641 | ||
283bc9f3 | 3642 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 | 3643 | err = pfkey_process(sk, skb, hdr); |
283bc9f3 | 3644 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
3645 | |
3646 | out: | |
3647 | if (err && hdr && pfkey_error(hdr, err, sk) == 0) | |
3648 | err = 0; | |
6f961068 | 3649 | kfree_skb(skb); |
1da177e4 LT |
3650 | |
3651 | return err ? : len; | |
3652 | } | |
3653 | ||
3654 | static int pfkey_recvmsg(struct kiocb *kiocb, | |
3655 | struct socket *sock, struct msghdr *msg, size_t len, | |
3656 | int flags) | |
3657 | { | |
3658 | struct sock *sk = sock->sk; | |
83321d6b | 3659 | struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4 LT |
3660 | struct sk_buff *skb; |
3661 | int copied, err; | |
3662 | ||
3663 | err = -EINVAL; | |
3664 | if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) | |
3665 | goto out; | |
3666 | ||
1da177e4 LT |
3667 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); |
3668 | if (skb == NULL) | |
3669 | goto out; | |
3670 | ||
3671 | copied = skb->len; | |
3672 | if (copied > len) { | |
3673 | msg->msg_flags |= MSG_TRUNC; | |
3674 | copied = len; | |
3675 | } | |
3676 | ||
badff6d0 | 3677 | skb_reset_transport_header(skb); |
1da177e4 LT |
3678 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3679 | if (err) | |
3680 | goto out_free; | |
3681 | ||
3b885787 | 3682 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
3683 | |
3684 | err = (flags & MSG_TRUNC) ? skb->len : copied; | |
3685 | ||
83321d6b TT |
3686 | if (pfk->dump.dump != NULL && |
3687 | 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) | |
3688 | pfkey_do_dump(pfk); | |
3689 | ||
1da177e4 LT |
3690 | out_free: |
3691 | skb_free_datagram(sk, skb); | |
3692 | out: | |
3693 | return err; | |
3694 | } | |
3695 | ||
90ddc4f0 | 3696 | static const struct proto_ops pfkey_ops = { |
1da177e4 LT |
3697 | .family = PF_KEY, |
3698 | .owner = THIS_MODULE, | |
3699 | /* Operations that make no sense on pfkey sockets. */ | |
3700 | .bind = sock_no_bind, | |
3701 | .connect = sock_no_connect, | |
3702 | .socketpair = sock_no_socketpair, | |
3703 | .accept = sock_no_accept, | |
3704 | .getname = sock_no_getname, | |
3705 | .ioctl = sock_no_ioctl, | |
3706 | .listen = sock_no_listen, | |
3707 | .shutdown = sock_no_shutdown, | |
3708 | .setsockopt = sock_no_setsockopt, | |
3709 | .getsockopt = sock_no_getsockopt, | |
3710 | .mmap = sock_no_mmap, | |
3711 | .sendpage = sock_no_sendpage, | |
3712 | ||
3713 | /* Now the operations that really occur. */ | |
3714 | .release = pfkey_release, | |
3715 | .poll = datagram_poll, | |
3716 | .sendmsg = pfkey_sendmsg, | |
3717 | .recvmsg = pfkey_recvmsg, | |
3718 | }; | |
3719 | ||
ec1b4cf7 | 3720 | static const struct net_proto_family pfkey_family_ops = { |
1da177e4 LT |
3721 | .family = PF_KEY, |
3722 | .create = pfkey_create, | |
3723 | .owner = THIS_MODULE, | |
3724 | }; | |
3725 | ||
3726 | #ifdef CONFIG_PROC_FS | |
bd2f7476 | 3727 | static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4 | 3728 | { |
27b5b865 | 3729 | struct sock *s = sk_entry(v); |
1da177e4 | 3730 | |
bd2f7476 PE |
3731 | if (v == SEQ_START_TOKEN) |
3732 | seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); | |
3733 | else | |
71338aa7 | 3734 | seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n", |
1da177e4 LT |
3735 | s, |
3736 | atomic_read(&s->sk_refcnt), | |
31e6d363 ED |
3737 | sk_rmem_alloc_get(s), |
3738 | sk_wmem_alloc_get(s), | |
a7cb5a49 | 3739 | from_kuid_munged(seq_user_ns(f), sock_i_uid(s)), |
1da177e4 LT |
3740 | sock_i_ino(s) |
3741 | ); | |
bd2f7476 PE |
3742 | return 0; |
3743 | } | |
3744 | ||
3745 | static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) | |
ada440e3 | 3746 | __acquires(rcu) |
bd2f7476 | 3747 | { |
7013ec30 | 3748 | struct net *net = seq_file_net(f); |
3fa87a32 | 3749 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4 | 3750 | |
7f6b9dbd | 3751 | rcu_read_lock(); |
3752 | return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); | |
bd2f7476 PE |
3753 | } |
3754 | ||
3755 | static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) | |
3756 | { | |
7013ec30 | 3757 | struct net *net = seq_file_net(f); |
3fa87a32 AD |
3758 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3759 | ||
7f6b9dbd | 3760 | return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
bd2f7476 | 3761 | } |
1da177e4 | 3762 | |
bd2f7476 | 3763 | static void pfkey_seq_stop(struct seq_file *f, void *v) |
ada440e3 | 3764 | __releases(rcu) |
bd2f7476 | 3765 | { |
7f6b9dbd | 3766 | rcu_read_unlock(); |
bd2f7476 | 3767 | } |
1da177e4 | 3768 | |
98147d52 | 3769 | static const struct seq_operations pfkey_seq_ops = { |
bd2f7476 PE |
3770 | .start = pfkey_seq_start, |
3771 | .next = pfkey_seq_next, | |
3772 | .stop = pfkey_seq_stop, | |
3773 | .show = pfkey_seq_show, | |
3774 | }; | |
1da177e4 | 3775 | |
bd2f7476 PE |
3776 | static int pfkey_seq_open(struct inode *inode, struct file *file) |
3777 | { | |
7013ec30 AD |
3778 | return seq_open_net(inode, file, &pfkey_seq_ops, |
3779 | sizeof(struct seq_net_private)); | |
1da177e4 | 3780 | } |
61145aa1 | 3781 | |
5ca1b998 | 3782 | static const struct file_operations pfkey_proc_ops = { |
bd2f7476 PE |
3783 | .open = pfkey_seq_open, |
3784 | .read = seq_read, | |
3785 | .llseek = seq_lseek, | |
7013ec30 | 3786 | .release = seq_release_net, |
bd2f7476 PE |
3787 | }; |
3788 | ||
7013ec30 | 3789 | static int __net_init pfkey_init_proc(struct net *net) |
61145aa1 | 3790 | { |
bd2f7476 PE |
3791 | struct proc_dir_entry *e; |
3792 | ||
d4beaa66 | 3793 | e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops); |
bd2f7476 | 3794 | if (e == NULL) |
61145aa1 | 3795 | return -ENOMEM; |
bd2f7476 | 3796 | |
bd2f7476 | 3797 | return 0; |
61145aa1 PE |
3798 | } |
3799 | ||
2c8c1e72 | 3800 | static void __net_exit pfkey_exit_proc(struct net *net) |
61145aa1 | 3801 | { |
ece31ffd | 3802 | remove_proc_entry("pfkey", net->proc_net); |
61145aa1 PE |
3803 | } |
3804 | #else | |
2c8c1e72 | 3805 | static inline int pfkey_init_proc(struct net *net) |
61145aa1 PE |
3806 | { |
3807 | return 0; | |
3808 | } | |
3809 | ||
2c8c1e72 | 3810 | static inline void pfkey_exit_proc(struct net *net) |
61145aa1 PE |
3811 | { |
3812 | } | |
1da177e4 LT |
3813 | #endif |
3814 | ||
3815 | static struct xfrm_mgr pfkeyv2_mgr = | |
3816 | { | |
3817 | .id = "pfkeyv2", | |
3818 | .notify = pfkey_send_notify, | |
3819 | .acquire = pfkey_send_acquire, | |
3820 | .compile_policy = pfkey_compile_policy, | |
3821 | .new_mapping = pfkey_send_new_mapping, | |
26b15dad | 3822 | .notify_policy = pfkey_send_policy_notify, |
08de61be | 3823 | .migrate = pfkey_send_migrate, |
0f24558e | 3824 | .is_alive = pfkey_is_alive, |
1da177e4 LT |
3825 | }; |
3826 | ||
3fa87a32 AD |
3827 | static int __net_init pfkey_net_init(struct net *net) |
3828 | { | |
23c049ca | 3829 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3fa87a32 AD |
3830 | int rv; |
3831 | ||
3fa87a32 AD |
3832 | INIT_HLIST_HEAD(&net_pfkey->table); |
3833 | atomic_set(&net_pfkey->socks_nr, 0); | |
23c049ca | 3834 | |
7013ec30 | 3835 | rv = pfkey_init_proc(net); |
3fa87a32 | 3836 | |
3fa87a32 AD |
3837 | return rv; |
3838 | } | |
3839 | ||
3840 | static void __net_exit pfkey_net_exit(struct net *net) | |
3841 | { | |
3842 | struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); | |
3843 | ||
7013ec30 | 3844 | pfkey_exit_proc(net); |
3fa87a32 | 3845 | BUG_ON(!hlist_empty(&net_pfkey->table)); |
3fa87a32 AD |
3846 | } |
3847 | ||
3848 | static struct pernet_operations pfkey_net_ops = { | |
3849 | .init = pfkey_net_init, | |
3850 | .exit = pfkey_net_exit, | |
23c049ca EB |
3851 | .id = &pfkey_net_id, |
3852 | .size = sizeof(struct netns_pfkey), | |
3fa87a32 AD |
3853 | }; |
3854 | ||
1da177e4 LT |
3855 | static void __exit ipsec_pfkey_exit(void) |
3856 | { | |
3857 | xfrm_unregister_km(&pfkeyv2_mgr); | |
1da177e4 | 3858 | sock_unregister(PF_KEY); |
180211b8 | 3859 | unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3860 | proto_unregister(&key_proto); |
3861 | } | |
3862 | ||
3863 | static int __init ipsec_pfkey_init(void) | |
3864 | { | |
3865 | int err = proto_register(&key_proto, 0); | |
3866 | ||
3867 | if (err != 0) | |
3868 | goto out; | |
3869 | ||
180211b8 | 3870 | err = register_pernet_subsys(&pfkey_net_ops); |
1da177e4 LT |
3871 | if (err != 0) |
3872 | goto out_unregister_key_proto; | |
180211b8 AD |
3873 | err = sock_register(&pfkey_family_ops); |
3874 | if (err != 0) | |
3875 | goto out_unregister_pernet; | |
1da177e4 LT |
3876 | err = xfrm_register_km(&pfkeyv2_mgr); |
3877 | if (err != 0) | |
7013ec30 | 3878 | goto out_sock_unregister; |
1da177e4 LT |
3879 | out: |
3880 | return err; | |
180211b8 | 3881 | |
1da177e4 | 3882 | out_sock_unregister: |
1da177e4 | 3883 | sock_unregister(PF_KEY); |
180211b8 AD |
3884 | out_unregister_pernet: |
3885 | unregister_pernet_subsys(&pfkey_net_ops); | |
1da177e4 LT |
3886 | out_unregister_key_proto: |
3887 | proto_unregister(&key_proto); | |
3888 | goto out; | |
3889 | } | |
3890 | ||
3891 | module_init(ipsec_pfkey_init); | |
3892 | module_exit(ipsec_pfkey_exit); | |
3893 | MODULE_LICENSE("GPL"); | |
3894 | MODULE_ALIAS_NETPROTO(PF_KEY); |