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Commit | Line | Data |
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1da177e4 LT |
1 | /* xfrm_user.c: User interface to configure xfrm engine. |
2 | * | |
3 | * Copyright (C) 2002 David S. Miller (davem@redhat.com) | |
4 | * | |
5 | * Changes: | |
6 | * Mitsuru KANDA @USAGI | |
7 | * Kazunori MIYAZAWA @USAGI | |
8 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
9 | * IPv6 support | |
df71837d | 10 | * |
1da177e4 LT |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/socket.h> | |
18 | #include <linux/string.h> | |
19 | #include <linux/net.h> | |
20 | #include <linux/skbuff.h> | |
1da177e4 LT |
21 | #include <linux/rtnetlink.h> |
22 | #include <linux/pfkeyv2.h> | |
23 | #include <linux/ipsec.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/security.h> | |
26 | #include <net/sock.h> | |
27 | #include <net/xfrm.h> | |
88fc2c84 | 28 | #include <net/netlink.h> |
1da177e4 LT |
29 | #include <asm/uaccess.h> |
30 | ||
31 | static struct sock *xfrm_nl; | |
32 | ||
33 | static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) | |
34 | { | |
35 | struct rtattr *rt = xfrma[type - 1]; | |
36 | struct xfrm_algo *algp; | |
31c26852 | 37 | int len; |
1da177e4 LT |
38 | |
39 | if (!rt) | |
40 | return 0; | |
41 | ||
31c26852 HX |
42 | len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); |
43 | if (len < 0) | |
1da177e4 LT |
44 | return -EINVAL; |
45 | ||
46 | algp = RTA_DATA(rt); | |
31c26852 HX |
47 | |
48 | len -= (algp->alg_key_len + 7U) / 8; | |
49 | if (len < 0) | |
50 | return -EINVAL; | |
51 | ||
1da177e4 LT |
52 | switch (type) { |
53 | case XFRMA_ALG_AUTH: | |
54 | if (!algp->alg_key_len && | |
55 | strcmp(algp->alg_name, "digest_null") != 0) | |
56 | return -EINVAL; | |
57 | break; | |
58 | ||
59 | case XFRMA_ALG_CRYPT: | |
60 | if (!algp->alg_key_len && | |
61 | strcmp(algp->alg_name, "cipher_null") != 0) | |
62 | return -EINVAL; | |
63 | break; | |
64 | ||
65 | case XFRMA_ALG_COMP: | |
66 | /* Zero length keys are legal. */ | |
67 | break; | |
68 | ||
69 | default: | |
70 | return -EINVAL; | |
71 | }; | |
72 | ||
73 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static int verify_encap_tmpl(struct rtattr **xfrma) | |
78 | { | |
79 | struct rtattr *rt = xfrma[XFRMA_ENCAP - 1]; | |
80 | struct xfrm_encap_tmpl *encap; | |
81 | ||
82 | if (!rt) | |
83 | return 0; | |
84 | ||
85 | if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap)) | |
86 | return -EINVAL; | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
df71837d TJ |
91 | |
92 | static inline int verify_sec_ctx_len(struct rtattr **xfrma) | |
93 | { | |
94 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1]; | |
95 | struct xfrm_user_sec_ctx *uctx; | |
96 | int len = 0; | |
97 | ||
98 | if (!rt) | |
99 | return 0; | |
100 | ||
101 | if (rt->rta_len < sizeof(*uctx)) | |
102 | return -EINVAL; | |
103 | ||
104 | uctx = RTA_DATA(rt); | |
105 | ||
106 | if (uctx->ctx_len > PAGE_SIZE) | |
107 | return -EINVAL; | |
108 | ||
109 | len += sizeof(struct xfrm_user_sec_ctx); | |
110 | len += uctx->ctx_len; | |
111 | ||
112 | if (uctx->len != len) | |
113 | return -EINVAL; | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | ||
1da177e4 LT |
119 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
120 | struct rtattr **xfrma) | |
121 | { | |
122 | int err; | |
123 | ||
124 | err = -EINVAL; | |
125 | switch (p->family) { | |
126 | case AF_INET: | |
127 | break; | |
128 | ||
129 | case AF_INET6: | |
130 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
131 | break; | |
132 | #else | |
133 | err = -EAFNOSUPPORT; | |
134 | goto out; | |
135 | #endif | |
136 | ||
137 | default: | |
138 | goto out; | |
139 | }; | |
140 | ||
141 | err = -EINVAL; | |
142 | switch (p->id.proto) { | |
143 | case IPPROTO_AH: | |
144 | if (!xfrma[XFRMA_ALG_AUTH-1] || | |
145 | xfrma[XFRMA_ALG_CRYPT-1] || | |
146 | xfrma[XFRMA_ALG_COMP-1]) | |
147 | goto out; | |
148 | break; | |
149 | ||
150 | case IPPROTO_ESP: | |
151 | if ((!xfrma[XFRMA_ALG_AUTH-1] && | |
152 | !xfrma[XFRMA_ALG_CRYPT-1]) || | |
153 | xfrma[XFRMA_ALG_COMP-1]) | |
154 | goto out; | |
155 | break; | |
156 | ||
157 | case IPPROTO_COMP: | |
158 | if (!xfrma[XFRMA_ALG_COMP-1] || | |
159 | xfrma[XFRMA_ALG_AUTH-1] || | |
160 | xfrma[XFRMA_ALG_CRYPT-1]) | |
161 | goto out; | |
162 | break; | |
163 | ||
164 | default: | |
165 | goto out; | |
166 | }; | |
167 | ||
168 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH))) | |
169 | goto out; | |
170 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT))) | |
171 | goto out; | |
172 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP))) | |
173 | goto out; | |
174 | if ((err = verify_encap_tmpl(xfrma))) | |
175 | goto out; | |
df71837d TJ |
176 | if ((err = verify_sec_ctx_len(xfrma))) |
177 | goto out; | |
1da177e4 LT |
178 | |
179 | err = -EINVAL; | |
180 | switch (p->mode) { | |
181 | case 0: | |
182 | case 1: | |
183 | break; | |
184 | ||
185 | default: | |
186 | goto out; | |
187 | }; | |
188 | ||
189 | err = 0; | |
190 | ||
191 | out: | |
192 | return err; | |
193 | } | |
194 | ||
195 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
196 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
197 | struct rtattr *u_arg) | |
198 | { | |
199 | struct rtattr *rta = u_arg; | |
200 | struct xfrm_algo *p, *ualg; | |
201 | struct xfrm_algo_desc *algo; | |
b9e9dead | 202 | int len; |
1da177e4 LT |
203 | |
204 | if (!rta) | |
205 | return 0; | |
206 | ||
207 | ualg = RTA_DATA(rta); | |
208 | ||
209 | algo = get_byname(ualg->alg_name, 1); | |
210 | if (!algo) | |
211 | return -ENOSYS; | |
212 | *props = algo->desc.sadb_alg_id; | |
213 | ||
b9e9dead HX |
214 | len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8; |
215 | p = kmalloc(len, GFP_KERNEL); | |
1da177e4 LT |
216 | if (!p) |
217 | return -ENOMEM; | |
218 | ||
b9e9dead | 219 | memcpy(p, ualg, len); |
1da177e4 LT |
220 | *algpp = p; |
221 | return 0; | |
222 | } | |
223 | ||
224 | static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg) | |
225 | { | |
226 | struct rtattr *rta = u_arg; | |
227 | struct xfrm_encap_tmpl *p, *uencap; | |
228 | ||
229 | if (!rta) | |
230 | return 0; | |
231 | ||
232 | uencap = RTA_DATA(rta); | |
233 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
234 | if (!p) | |
235 | return -ENOMEM; | |
236 | ||
237 | memcpy(p, uencap, sizeof(*p)); | |
238 | *encapp = p; | |
239 | return 0; | |
240 | } | |
241 | ||
df71837d TJ |
242 | |
243 | static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp) | |
244 | { | |
245 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
246 | int len = 0; | |
247 | ||
248 | if (xfrm_ctx) { | |
249 | len += sizeof(struct xfrm_user_sec_ctx); | |
250 | len += xfrm_ctx->ctx_len; | |
251 | } | |
252 | return len; | |
253 | } | |
254 | ||
255 | static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg) | |
256 | { | |
257 | struct xfrm_user_sec_ctx *uctx; | |
258 | ||
259 | if (!u_arg) | |
260 | return 0; | |
261 | ||
262 | uctx = RTA_DATA(u_arg); | |
263 | return security_xfrm_state_alloc(x, uctx); | |
264 | } | |
265 | ||
1da177e4 LT |
266 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
267 | { | |
268 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
269 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
270 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
271 | x->props.mode = p->mode; | |
272 | x->props.replay_window = p->replay_window; | |
273 | x->props.reqid = p->reqid; | |
274 | x->props.family = p->family; | |
275 | x->props.saddr = p->saddr; | |
276 | x->props.flags = p->flags; | |
277 | } | |
278 | ||
279 | static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, | |
280 | struct rtattr **xfrma, | |
281 | int *errp) | |
282 | { | |
283 | struct xfrm_state *x = xfrm_state_alloc(); | |
284 | int err = -ENOMEM; | |
285 | ||
286 | if (!x) | |
287 | goto error_no_put; | |
288 | ||
289 | copy_from_user_state(x, p); | |
290 | ||
291 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, | |
292 | xfrm_aalg_get_byname, | |
293 | xfrma[XFRMA_ALG_AUTH-1]))) | |
294 | goto error; | |
295 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
296 | xfrm_ealg_get_byname, | |
297 | xfrma[XFRMA_ALG_CRYPT-1]))) | |
298 | goto error; | |
299 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
300 | xfrm_calg_get_byname, | |
301 | xfrma[XFRMA_ALG_COMP-1]))) | |
302 | goto error; | |
303 | if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) | |
304 | goto error; | |
305 | ||
72cb6962 | 306 | err = xfrm_init_state(x); |
1da177e4 LT |
307 | if (err) |
308 | goto error; | |
309 | ||
df71837d TJ |
310 | if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) |
311 | goto error; | |
312 | ||
1da177e4 LT |
313 | x->km.seq = p->seq; |
314 | ||
315 | return x; | |
316 | ||
317 | error: | |
318 | x->km.state = XFRM_STATE_DEAD; | |
319 | xfrm_state_put(x); | |
320 | error_no_put: | |
321 | *errp = err; | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
326 | { | |
327 | struct xfrm_usersa_info *p = NLMSG_DATA(nlh); | |
328 | struct xfrm_state *x; | |
329 | int err; | |
26b15dad | 330 | struct km_event c; |
1da177e4 | 331 | |
df71837d | 332 | err = verify_newsa_info(p, (struct rtattr **)xfrma); |
1da177e4 LT |
333 | if (err) |
334 | return err; | |
335 | ||
df71837d | 336 | x = xfrm_state_construct(p, (struct rtattr **)xfrma, &err); |
1da177e4 LT |
337 | if (!x) |
338 | return err; | |
339 | ||
26b15dad | 340 | xfrm_state_hold(x); |
1da177e4 LT |
341 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
342 | err = xfrm_state_add(x); | |
343 | else | |
344 | err = xfrm_state_update(x); | |
345 | ||
346 | if (err < 0) { | |
347 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 348 | __xfrm_state_put(x); |
7d6dfe1f | 349 | goto out; |
1da177e4 LT |
350 | } |
351 | ||
26b15dad JHS |
352 | c.seq = nlh->nlmsg_seq; |
353 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 354 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
355 | |
356 | km_state_notify(x, &c); | |
7d6dfe1f | 357 | out: |
26b15dad | 358 | xfrm_state_put(x); |
1da177e4 LT |
359 | return err; |
360 | } | |
361 | ||
362 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
363 | { | |
364 | struct xfrm_state *x; | |
26b15dad JHS |
365 | int err; |
366 | struct km_event c; | |
1da177e4 LT |
367 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); |
368 | ||
369 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
370 | if (x == NULL) | |
371 | return -ESRCH; | |
372 | ||
373 | if (xfrm_state_kern(x)) { | |
374 | xfrm_state_put(x); | |
375 | return -EPERM; | |
376 | } | |
377 | ||
26b15dad JHS |
378 | err = xfrm_state_delete(x); |
379 | if (err < 0) { | |
380 | xfrm_state_put(x); | |
381 | return err; | |
382 | } | |
383 | ||
384 | c.seq = nlh->nlmsg_seq; | |
385 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 386 | c.event = nlh->nlmsg_type; |
26b15dad | 387 | km_state_notify(x, &c); |
1da177e4 LT |
388 | xfrm_state_put(x); |
389 | ||
26b15dad | 390 | return err; |
1da177e4 LT |
391 | } |
392 | ||
393 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
394 | { | |
395 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
396 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
397 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
398 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
399 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
400 | p->saddr = x->props.saddr; | |
401 | p->mode = x->props.mode; | |
402 | p->replay_window = x->props.replay_window; | |
403 | p->reqid = x->props.reqid; | |
404 | p->family = x->props.family; | |
405 | p->flags = x->props.flags; | |
406 | p->seq = x->km.seq; | |
407 | } | |
408 | ||
409 | struct xfrm_dump_info { | |
410 | struct sk_buff *in_skb; | |
411 | struct sk_buff *out_skb; | |
412 | u32 nlmsg_seq; | |
413 | u16 nlmsg_flags; | |
414 | int start_idx; | |
415 | int this_idx; | |
416 | }; | |
417 | ||
418 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
419 | { | |
420 | struct xfrm_dump_info *sp = ptr; | |
421 | struct sk_buff *in_skb = sp->in_skb; | |
422 | struct sk_buff *skb = sp->out_skb; | |
423 | struct xfrm_usersa_info *p; | |
424 | struct nlmsghdr *nlh; | |
425 | unsigned char *b = skb->tail; | |
426 | ||
427 | if (sp->this_idx < sp->start_idx) | |
428 | goto out; | |
429 | ||
430 | nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, | |
431 | sp->nlmsg_seq, | |
432 | XFRM_MSG_NEWSA, sizeof(*p)); | |
433 | nlh->nlmsg_flags = sp->nlmsg_flags; | |
434 | ||
435 | p = NLMSG_DATA(nlh); | |
436 | copy_to_user_state(x, p); | |
437 | ||
438 | if (x->aalg) | |
439 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
440 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
441 | if (x->ealg) | |
442 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
443 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
444 | if (x->calg) | |
445 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
446 | ||
447 | if (x->encap) | |
448 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
449 | ||
df71837d TJ |
450 | if (x->security) { |
451 | int ctx_size = sizeof(struct xfrm_sec_ctx) + | |
452 | x->security->ctx_len; | |
453 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
454 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
455 | ||
456 | uctx->exttype = XFRMA_SEC_CTX; | |
457 | uctx->len = ctx_size; | |
458 | uctx->ctx_doi = x->security->ctx_doi; | |
459 | uctx->ctx_alg = x->security->ctx_alg; | |
460 | uctx->ctx_len = x->security->ctx_len; | |
461 | memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); | |
462 | } | |
1da177e4 LT |
463 | nlh->nlmsg_len = skb->tail - b; |
464 | out: | |
465 | sp->this_idx++; | |
466 | return 0; | |
467 | ||
468 | nlmsg_failure: | |
469 | rtattr_failure: | |
470 | skb_trim(skb, b - skb->data); | |
471 | return -1; | |
472 | } | |
473 | ||
474 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) | |
475 | { | |
476 | struct xfrm_dump_info info; | |
477 | ||
478 | info.in_skb = cb->skb; | |
479 | info.out_skb = skb; | |
480 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
481 | info.nlmsg_flags = NLM_F_MULTI; | |
482 | info.this_idx = 0; | |
483 | info.start_idx = cb->args[0]; | |
484 | (void) xfrm_state_walk(IPSEC_PROTO_ANY, dump_one_state, &info); | |
485 | cb->args[0] = info.this_idx; | |
486 | ||
487 | return skb->len; | |
488 | } | |
489 | ||
490 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
491 | struct xfrm_state *x, u32 seq) | |
492 | { | |
493 | struct xfrm_dump_info info; | |
494 | struct sk_buff *skb; | |
495 | ||
496 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); | |
497 | if (!skb) | |
498 | return ERR_PTR(-ENOMEM); | |
499 | ||
500 | NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; | |
501 | info.in_skb = in_skb; | |
502 | info.out_skb = skb; | |
503 | info.nlmsg_seq = seq; | |
504 | info.nlmsg_flags = 0; | |
505 | info.this_idx = info.start_idx = 0; | |
506 | ||
507 | if (dump_one_state(x, 0, &info)) { | |
508 | kfree_skb(skb); | |
509 | return NULL; | |
510 | } | |
511 | ||
512 | return skb; | |
513 | } | |
514 | ||
515 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
516 | { | |
517 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); | |
518 | struct xfrm_state *x; | |
519 | struct sk_buff *resp_skb; | |
520 | int err; | |
521 | ||
522 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
523 | err = -ESRCH; | |
524 | if (x == NULL) | |
525 | goto out_noput; | |
526 | ||
527 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
528 | if (IS_ERR(resp_skb)) { | |
529 | err = PTR_ERR(resp_skb); | |
530 | } else { | |
531 | err = netlink_unicast(xfrm_nl, resp_skb, | |
532 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
533 | } | |
534 | xfrm_state_put(x); | |
535 | out_noput: | |
536 | return err; | |
537 | } | |
538 | ||
539 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
540 | { | |
541 | switch (p->info.id.proto) { | |
542 | case IPPROTO_AH: | |
543 | case IPPROTO_ESP: | |
544 | break; | |
545 | ||
546 | case IPPROTO_COMP: | |
547 | /* IPCOMP spi is 16-bits. */ | |
548 | if (p->max >= 0x10000) | |
549 | return -EINVAL; | |
550 | break; | |
551 | ||
552 | default: | |
553 | return -EINVAL; | |
554 | }; | |
555 | ||
556 | if (p->min > p->max) | |
557 | return -EINVAL; | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
562 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
563 | { | |
564 | struct xfrm_state *x; | |
565 | struct xfrm_userspi_info *p; | |
566 | struct sk_buff *resp_skb; | |
567 | xfrm_address_t *daddr; | |
568 | int family; | |
569 | int err; | |
570 | ||
571 | p = NLMSG_DATA(nlh); | |
572 | err = verify_userspi_info(p); | |
573 | if (err) | |
574 | goto out_noput; | |
575 | ||
576 | family = p->info.family; | |
577 | daddr = &p->info.id.daddr; | |
578 | ||
579 | x = NULL; | |
580 | if (p->info.seq) { | |
581 | x = xfrm_find_acq_byseq(p->info.seq); | |
582 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
583 | xfrm_state_put(x); | |
584 | x = NULL; | |
585 | } | |
586 | } | |
587 | ||
588 | if (!x) | |
589 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
590 | p->info.id.proto, daddr, | |
591 | &p->info.saddr, 1, | |
592 | family); | |
593 | err = -ENOENT; | |
594 | if (x == NULL) | |
595 | goto out_noput; | |
596 | ||
597 | resp_skb = ERR_PTR(-ENOENT); | |
598 | ||
599 | spin_lock_bh(&x->lock); | |
600 | if (x->km.state != XFRM_STATE_DEAD) { | |
601 | xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); | |
602 | if (x->id.spi) | |
603 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
604 | } | |
605 | spin_unlock_bh(&x->lock); | |
606 | ||
607 | if (IS_ERR(resp_skb)) { | |
608 | err = PTR_ERR(resp_skb); | |
609 | goto out; | |
610 | } | |
611 | ||
612 | err = netlink_unicast(xfrm_nl, resp_skb, | |
613 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
614 | ||
615 | out: | |
616 | xfrm_state_put(x); | |
617 | out_noput: | |
618 | return err; | |
619 | } | |
620 | ||
621 | static int verify_policy_dir(__u8 dir) | |
622 | { | |
623 | switch (dir) { | |
624 | case XFRM_POLICY_IN: | |
625 | case XFRM_POLICY_OUT: | |
626 | case XFRM_POLICY_FWD: | |
627 | break; | |
628 | ||
629 | default: | |
630 | return -EINVAL; | |
631 | }; | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) | |
637 | { | |
638 | switch (p->share) { | |
639 | case XFRM_SHARE_ANY: | |
640 | case XFRM_SHARE_SESSION: | |
641 | case XFRM_SHARE_USER: | |
642 | case XFRM_SHARE_UNIQUE: | |
643 | break; | |
644 | ||
645 | default: | |
646 | return -EINVAL; | |
647 | }; | |
648 | ||
649 | switch (p->action) { | |
650 | case XFRM_POLICY_ALLOW: | |
651 | case XFRM_POLICY_BLOCK: | |
652 | break; | |
653 | ||
654 | default: | |
655 | return -EINVAL; | |
656 | }; | |
657 | ||
658 | switch (p->sel.family) { | |
659 | case AF_INET: | |
660 | break; | |
661 | ||
662 | case AF_INET6: | |
663 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
664 | break; | |
665 | #else | |
666 | return -EAFNOSUPPORT; | |
667 | #endif | |
668 | ||
669 | default: | |
670 | return -EINVAL; | |
671 | }; | |
672 | ||
673 | return verify_policy_dir(p->dir); | |
674 | } | |
675 | ||
df71837d TJ |
676 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) |
677 | { | |
678 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; | |
679 | struct xfrm_user_sec_ctx *uctx; | |
680 | ||
681 | if (!rt) | |
682 | return 0; | |
683 | ||
684 | uctx = RTA_DATA(rt); | |
685 | return security_xfrm_policy_alloc(pol, uctx); | |
686 | } | |
687 | ||
1da177e4 LT |
688 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
689 | int nr) | |
690 | { | |
691 | int i; | |
692 | ||
693 | xp->xfrm_nr = nr; | |
694 | for (i = 0; i < nr; i++, ut++) { | |
695 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
696 | ||
697 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
698 | memcpy(&t->saddr, &ut->saddr, | |
699 | sizeof(xfrm_address_t)); | |
700 | t->reqid = ut->reqid; | |
701 | t->mode = ut->mode; | |
702 | t->share = ut->share; | |
703 | t->optional = ut->optional; | |
704 | t->aalgos = ut->aalgos; | |
705 | t->ealgos = ut->ealgos; | |
706 | t->calgos = ut->calgos; | |
707 | } | |
708 | } | |
709 | ||
710 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) | |
711 | { | |
712 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
713 | struct xfrm_user_tmpl *utmpl; | |
714 | int nr; | |
715 | ||
716 | if (!rt) { | |
717 | pol->xfrm_nr = 0; | |
718 | } else { | |
719 | nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); | |
720 | ||
721 | if (nr > XFRM_MAX_DEPTH) | |
722 | return -EINVAL; | |
723 | ||
724 | copy_templates(pol, RTA_DATA(rt), nr); | |
725 | } | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) | |
730 | { | |
731 | xp->priority = p->priority; | |
732 | xp->index = p->index; | |
733 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
734 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
735 | xp->action = p->action; | |
736 | xp->flags = p->flags; | |
737 | xp->family = p->sel.family; | |
738 | /* XXX xp->share = p->share; */ | |
739 | } | |
740 | ||
741 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
742 | { | |
743 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
744 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
745 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
746 | p->priority = xp->priority; | |
747 | p->index = xp->index; | |
748 | p->sel.family = xp->family; | |
749 | p->dir = dir; | |
750 | p->action = xp->action; | |
751 | p->flags = xp->flags; | |
752 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
753 | } | |
754 | ||
755 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) | |
756 | { | |
757 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
758 | int err; | |
759 | ||
760 | if (!xp) { | |
761 | *errp = -ENOMEM; | |
762 | return NULL; | |
763 | } | |
764 | ||
765 | copy_from_user_policy(xp, p); | |
df71837d TJ |
766 | |
767 | if (!(err = copy_from_user_tmpl(xp, xfrma))) | |
768 | err = copy_from_user_sec_ctx(xp, xfrma); | |
769 | ||
1da177e4 LT |
770 | if (err) { |
771 | *errp = err; | |
772 | kfree(xp); | |
773 | xp = NULL; | |
774 | } | |
775 | ||
776 | return xp; | |
777 | } | |
778 | ||
779 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
780 | { | |
781 | struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); | |
782 | struct xfrm_policy *xp; | |
26b15dad | 783 | struct km_event c; |
1da177e4 LT |
784 | int err; |
785 | int excl; | |
786 | ||
787 | err = verify_newpolicy_info(p); | |
df71837d TJ |
788 | if (err) |
789 | return err; | |
790 | err = verify_sec_ctx_len((struct rtattr **)xfrma); | |
1da177e4 LT |
791 | if (err) |
792 | return err; | |
793 | ||
df71837d | 794 | xp = xfrm_policy_construct(p, (struct rtattr **)xfrma, &err); |
1da177e4 LT |
795 | if (!xp) |
796 | return err; | |
797 | ||
26b15dad JHS |
798 | /* shouldnt excl be based on nlh flags?? |
799 | * Aha! this is anti-netlink really i.e more pfkey derived | |
800 | * in netlink excl is a flag and you wouldnt need | |
801 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
802 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
803 | err = xfrm_policy_insert(p->dir, xp, excl); | |
804 | if (err) { | |
5f8ac64b | 805 | security_xfrm_policy_free(xp); |
1da177e4 LT |
806 | kfree(xp); |
807 | return err; | |
808 | } | |
809 | ||
f60f6b8f | 810 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
811 | c.seq = nlh->nlmsg_seq; |
812 | c.pid = nlh->nlmsg_pid; | |
813 | km_policy_notify(xp, p->dir, &c); | |
814 | ||
1da177e4 LT |
815 | xfrm_pol_put(xp); |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
820 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
821 | { | |
822 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
823 | int i; | |
824 | ||
825 | if (xp->xfrm_nr == 0) | |
826 | return 0; | |
827 | ||
828 | for (i = 0; i < xp->xfrm_nr; i++) { | |
829 | struct xfrm_user_tmpl *up = &vec[i]; | |
830 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
831 | ||
832 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
833 | up->family = xp->family; | |
834 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); | |
835 | up->reqid = kp->reqid; | |
836 | up->mode = kp->mode; | |
837 | up->share = kp->share; | |
838 | up->optional = kp->optional; | |
839 | up->aalgos = kp->aalgos; | |
840 | up->ealgos = kp->ealgos; | |
841 | up->calgos = kp->calgos; | |
842 | } | |
843 | RTA_PUT(skb, XFRMA_TMPL, | |
844 | (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), | |
845 | vec); | |
846 | ||
847 | return 0; | |
848 | ||
849 | rtattr_failure: | |
850 | return -1; | |
851 | } | |
852 | ||
df71837d TJ |
853 | static int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
854 | { | |
855 | if (xp->security) { | |
856 | int ctx_size = sizeof(struct xfrm_sec_ctx) + | |
857 | xp->security->ctx_len; | |
858 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
859 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
860 | ||
861 | uctx->exttype = XFRMA_SEC_CTX; | |
862 | uctx->len = ctx_size; | |
863 | uctx->ctx_doi = xp->security->ctx_doi; | |
864 | uctx->ctx_alg = xp->security->ctx_alg; | |
865 | uctx->ctx_len = xp->security->ctx_len; | |
866 | memcpy(uctx + 1, xp->security->ctx_str, xp->security->ctx_len); | |
867 | } | |
868 | return 0; | |
869 | ||
870 | rtattr_failure: | |
871 | return -1; | |
872 | } | |
873 | ||
1da177e4 LT |
874 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
875 | { | |
876 | struct xfrm_dump_info *sp = ptr; | |
877 | struct xfrm_userpolicy_info *p; | |
878 | struct sk_buff *in_skb = sp->in_skb; | |
879 | struct sk_buff *skb = sp->out_skb; | |
880 | struct nlmsghdr *nlh; | |
881 | unsigned char *b = skb->tail; | |
882 | ||
883 | if (sp->this_idx < sp->start_idx) | |
884 | goto out; | |
885 | ||
886 | nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, | |
887 | sp->nlmsg_seq, | |
888 | XFRM_MSG_NEWPOLICY, sizeof(*p)); | |
889 | p = NLMSG_DATA(nlh); | |
890 | nlh->nlmsg_flags = sp->nlmsg_flags; | |
891 | ||
892 | copy_to_user_policy(xp, p, dir); | |
893 | if (copy_to_user_tmpl(xp, skb) < 0) | |
894 | goto nlmsg_failure; | |
df71837d TJ |
895 | if (copy_to_user_sec_ctx(xp, skb)) |
896 | goto nlmsg_failure; | |
1da177e4 LT |
897 | |
898 | nlh->nlmsg_len = skb->tail - b; | |
899 | out: | |
900 | sp->this_idx++; | |
901 | return 0; | |
902 | ||
903 | nlmsg_failure: | |
904 | skb_trim(skb, b - skb->data); | |
905 | return -1; | |
906 | } | |
907 | ||
908 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
909 | { | |
910 | struct xfrm_dump_info info; | |
911 | ||
912 | info.in_skb = cb->skb; | |
913 | info.out_skb = skb; | |
914 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
915 | info.nlmsg_flags = NLM_F_MULTI; | |
916 | info.this_idx = 0; | |
917 | info.start_idx = cb->args[0]; | |
918 | (void) xfrm_policy_walk(dump_one_policy, &info); | |
919 | cb->args[0] = info.this_idx; | |
920 | ||
921 | return skb->len; | |
922 | } | |
923 | ||
924 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
925 | struct xfrm_policy *xp, | |
926 | int dir, u32 seq) | |
927 | { | |
928 | struct xfrm_dump_info info; | |
929 | struct sk_buff *skb; | |
930 | ||
931 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
932 | if (!skb) | |
933 | return ERR_PTR(-ENOMEM); | |
934 | ||
935 | NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; | |
936 | info.in_skb = in_skb; | |
937 | info.out_skb = skb; | |
938 | info.nlmsg_seq = seq; | |
939 | info.nlmsg_flags = 0; | |
940 | info.this_idx = info.start_idx = 0; | |
941 | ||
942 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
943 | kfree_skb(skb); | |
944 | return NULL; | |
945 | } | |
946 | ||
947 | return skb; | |
948 | } | |
949 | ||
950 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
951 | { | |
952 | struct xfrm_policy *xp; | |
953 | struct xfrm_userpolicy_id *p; | |
954 | int err; | |
26b15dad | 955 | struct km_event c; |
1da177e4 LT |
956 | int delete; |
957 | ||
958 | p = NLMSG_DATA(nlh); | |
959 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; | |
960 | ||
961 | err = verify_policy_dir(p->dir); | |
962 | if (err) | |
963 | return err; | |
964 | ||
965 | if (p->index) | |
966 | xp = xfrm_policy_byid(p->dir, p->index, delete); | |
df71837d TJ |
967 | else { |
968 | struct rtattr **rtattrs = (struct rtattr **)xfrma; | |
969 | struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; | |
970 | struct xfrm_policy tmp; | |
971 | ||
972 | err = verify_sec_ctx_len(rtattrs); | |
973 | if (err) | |
974 | return err; | |
975 | ||
976 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
977 | if (rt) { | |
978 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
979 | ||
980 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
981 | return err; | |
982 | } | |
983 | xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, delete); | |
984 | security_xfrm_policy_free(&tmp); | |
985 | } | |
1da177e4 LT |
986 | if (xp == NULL) |
987 | return -ENOENT; | |
988 | ||
989 | if (!delete) { | |
990 | struct sk_buff *resp_skb; | |
991 | ||
992 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
993 | if (IS_ERR(resp_skb)) { | |
994 | err = PTR_ERR(resp_skb); | |
995 | } else { | |
996 | err = netlink_unicast(xfrm_nl, resp_skb, | |
997 | NETLINK_CB(skb).pid, | |
998 | MSG_DONTWAIT); | |
999 | } | |
26b15dad | 1000 | } else { |
e7443892 | 1001 | c.data.byid = p->index; |
f60f6b8f | 1002 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1003 | c.seq = nlh->nlmsg_seq; |
1004 | c.pid = nlh->nlmsg_pid; | |
1005 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1006 | } |
1007 | ||
1008 | xfrm_pol_put(xp); | |
1009 | ||
1010 | return err; | |
1011 | } | |
1012 | ||
1013 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
1014 | { | |
26b15dad | 1015 | struct km_event c; |
1da177e4 LT |
1016 | struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); |
1017 | ||
1018 | xfrm_state_flush(p->proto); | |
bf08867f | 1019 | c.data.proto = p->proto; |
f60f6b8f | 1020 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1021 | c.seq = nlh->nlmsg_seq; |
1022 | c.pid = nlh->nlmsg_pid; | |
1023 | km_state_notify(NULL, &c); | |
1024 | ||
1da177e4 LT |
1025 | return 0; |
1026 | } | |
1027 | ||
1028 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
1029 | { | |
26b15dad JHS |
1030 | struct km_event c; |
1031 | ||
1da177e4 | 1032 | xfrm_policy_flush(); |
f60f6b8f | 1033 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1034 | c.seq = nlh->nlmsg_seq; |
1035 | c.pid = nlh->nlmsg_pid; | |
1036 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1037 | return 0; |
1038 | } | |
1039 | ||
492b558b TG |
1040 | #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) |
1041 | ||
1042 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1043 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1044 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1045 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1046 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1047 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1048 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1049 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
1050 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), | |
1051 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), | |
1052 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1053 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1054 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), | |
1055 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), | |
1056 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), | |
1da177e4 LT |
1057 | }; |
1058 | ||
492b558b TG |
1059 | #undef XMSGSIZE |
1060 | ||
1da177e4 LT |
1061 | static struct xfrm_link { |
1062 | int (*doit)(struct sk_buff *, struct nlmsghdr *, void **); | |
1063 | int (*dump)(struct sk_buff *, struct netlink_callback *); | |
492b558b TG |
1064 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1065 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1066 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1067 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1068 | .dump = xfrm_dump_sa }, | |
1069 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1070 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1071 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1072 | .dump = xfrm_dump_policy }, | |
1073 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
1074 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1075 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1076 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, | |
1077 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
1da177e4 LT |
1078 | }; |
1079 | ||
1da177e4 LT |
1080 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) |
1081 | { | |
1082 | struct rtattr *xfrma[XFRMA_MAX]; | |
1083 | struct xfrm_link *link; | |
1084 | int type, min_len; | |
1085 | ||
1086 | if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) | |
1087 | return 0; | |
1088 | ||
1089 | type = nlh->nlmsg_type; | |
1090 | ||
1091 | /* A control message: ignore them */ | |
1092 | if (type < XFRM_MSG_BASE) | |
1093 | return 0; | |
1094 | ||
1095 | /* Unknown message: reply with EINVAL */ | |
1096 | if (type > XFRM_MSG_MAX) | |
1097 | goto err_einval; | |
1098 | ||
1099 | type -= XFRM_MSG_BASE; | |
1100 | link = &xfrm_dispatch[type]; | |
1101 | ||
1102 | /* All operations require privileges, even GET */ | |
1103 | if (security_netlink_recv(skb)) { | |
1104 | *errp = -EPERM; | |
1105 | return -1; | |
1106 | } | |
1107 | ||
492b558b TG |
1108 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1109 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1110 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 LT |
1111 | if (link->dump == NULL) |
1112 | goto err_einval; | |
1113 | ||
1114 | if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh, | |
a8f74b22 | 1115 | link->dump, NULL)) != 0) { |
1da177e4 LT |
1116 | return -1; |
1117 | } | |
88fc2c84 TG |
1118 | |
1119 | netlink_queue_skip(nlh, skb); | |
1da177e4 LT |
1120 | return -1; |
1121 | } | |
1122 | ||
1123 | memset(xfrma, 0, sizeof(xfrma)); | |
1124 | ||
1125 | if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) | |
1126 | goto err_einval; | |
1127 | ||
1128 | if (nlh->nlmsg_len > min_len) { | |
1129 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
1130 | struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); | |
1131 | ||
1132 | while (RTA_OK(attr, attrlen)) { | |
1133 | unsigned short flavor = attr->rta_type; | |
1134 | if (flavor) { | |
1135 | if (flavor > XFRMA_MAX) | |
1136 | goto err_einval; | |
1137 | xfrma[flavor - 1] = attr; | |
1138 | } | |
1139 | attr = RTA_NEXT(attr, attrlen); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | if (link->doit == NULL) | |
1144 | goto err_einval; | |
1145 | *errp = link->doit(skb, nlh, (void **) &xfrma); | |
1146 | ||
1147 | return *errp; | |
1148 | ||
1149 | err_einval: | |
1150 | *errp = -EINVAL; | |
1151 | return -1; | |
1152 | } | |
1153 | ||
1da177e4 LT |
1154 | static void xfrm_netlink_rcv(struct sock *sk, int len) |
1155 | { | |
88fc2c84 | 1156 | unsigned int qlen = 0; |
2a0a6ebe | 1157 | |
1da177e4 | 1158 | do { |
1da177e4 | 1159 | down(&xfrm_cfg_sem); |
88fc2c84 | 1160 | netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); |
1da177e4 LT |
1161 | up(&xfrm_cfg_sem); |
1162 | ||
2a0a6ebe | 1163 | } while (qlen); |
1da177e4 LT |
1164 | } |
1165 | ||
1166 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, int hard) | |
1167 | { | |
1168 | struct xfrm_user_expire *ue; | |
1169 | struct nlmsghdr *nlh; | |
1170 | unsigned char *b = skb->tail; | |
1171 | ||
1172 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_EXPIRE, | |
1173 | sizeof(*ue)); | |
1174 | ue = NLMSG_DATA(nlh); | |
1175 | nlh->nlmsg_flags = 0; | |
1176 | ||
1177 | copy_to_user_state(x, &ue->state); | |
1178 | ue->hard = (hard != 0) ? 1 : 0; | |
1179 | ||
1180 | nlh->nlmsg_len = skb->tail - b; | |
1181 | return skb->len; | |
1182 | ||
1183 | nlmsg_failure: | |
1184 | skb_trim(skb, b - skb->data); | |
1185 | return -1; | |
1186 | } | |
1187 | ||
26b15dad | 1188 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1189 | { |
1190 | struct sk_buff *skb; | |
ee57eef9 | 1191 | int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); |
1da177e4 | 1192 | |
ee57eef9 | 1193 | skb = alloc_skb(len, GFP_ATOMIC); |
1da177e4 LT |
1194 | if (skb == NULL) |
1195 | return -ENOMEM; | |
1196 | ||
bf08867f | 1197 | if (build_expire(skb, x, c->data.hard) < 0) |
1da177e4 LT |
1198 | BUG(); |
1199 | ||
ac6d439d PM |
1200 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
1201 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
1202 | } |
1203 | ||
26b15dad JHS |
1204 | static int xfrm_notify_sa_flush(struct km_event *c) |
1205 | { | |
1206 | struct xfrm_usersa_flush *p; | |
1207 | struct nlmsghdr *nlh; | |
1208 | struct sk_buff *skb; | |
1209 | unsigned char *b; | |
1210 | int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); | |
1211 | ||
1212 | skb = alloc_skb(len, GFP_ATOMIC); | |
1213 | if (skb == NULL) | |
1214 | return -ENOMEM; | |
1215 | b = skb->tail; | |
1216 | ||
1217 | nlh = NLMSG_PUT(skb, c->pid, c->seq, | |
1218 | XFRM_MSG_FLUSHSA, sizeof(*p)); | |
1219 | nlh->nlmsg_flags = 0; | |
1220 | ||
1221 | p = NLMSG_DATA(nlh); | |
bf08867f | 1222 | p->proto = c->data.proto; |
26b15dad JHS |
1223 | |
1224 | nlh->nlmsg_len = skb->tail - b; | |
1225 | ||
ac6d439d PM |
1226 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
1227 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
1228 | |
1229 | nlmsg_failure: | |
1230 | kfree_skb(skb); | |
1231 | return -1; | |
1232 | } | |
1233 | ||
1234 | static int inline xfrm_sa_len(struct xfrm_state *x) | |
1235 | { | |
0603eac0 | 1236 | int l = 0; |
26b15dad JHS |
1237 | if (x->aalg) |
1238 | l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); | |
1239 | if (x->ealg) | |
1240 | l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); | |
1241 | if (x->calg) | |
1242 | l += RTA_SPACE(sizeof(*x->calg)); | |
1243 | if (x->encap) | |
1244 | l += RTA_SPACE(sizeof(*x->encap)); | |
1245 | ||
1246 | return l; | |
1247 | } | |
1248 | ||
1249 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1250 | { | |
1251 | struct xfrm_usersa_info *p; | |
0603eac0 | 1252 | struct xfrm_usersa_id *id; |
26b15dad JHS |
1253 | struct nlmsghdr *nlh; |
1254 | struct sk_buff *skb; | |
26b15dad JHS |
1255 | unsigned char *b; |
1256 | int len = xfrm_sa_len(x); | |
0603eac0 HX |
1257 | int headlen; |
1258 | ||
1259 | headlen = sizeof(*p); | |
1260 | if (c->event == XFRM_MSG_DELSA) { | |
1261 | len += RTA_SPACE(headlen); | |
1262 | headlen = sizeof(*id); | |
1263 | } | |
1264 | len += NLMSG_SPACE(headlen); | |
26b15dad JHS |
1265 | |
1266 | skb = alloc_skb(len, GFP_ATOMIC); | |
1267 | if (skb == NULL) | |
1268 | return -ENOMEM; | |
1269 | b = skb->tail; | |
1270 | ||
0603eac0 | 1271 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
1272 | nlh->nlmsg_flags = 0; |
1273 | ||
1274 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
1275 | if (c->event == XFRM_MSG_DELSA) { |
1276 | id = NLMSG_DATA(nlh); | |
1277 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); | |
1278 | id->spi = x->id.spi; | |
1279 | id->family = x->props.family; | |
1280 | id->proto = x->id.proto; | |
1281 | ||
1282 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); | |
1283 | } | |
1284 | ||
26b15dad JHS |
1285 | copy_to_user_state(x, p); |
1286 | ||
1287 | if (x->aalg) | |
1288 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
1289 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
1290 | if (x->ealg) | |
1291 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
1292 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
1293 | if (x->calg) | |
1294 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
1295 | ||
1296 | if (x->encap) | |
1297 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
1298 | ||
1299 | nlh->nlmsg_len = skb->tail - b; | |
1300 | ||
ac6d439d PM |
1301 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
1302 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
1303 | |
1304 | nlmsg_failure: | |
1305 | rtattr_failure: | |
1306 | kfree_skb(skb); | |
1307 | return -1; | |
1308 | } | |
1309 | ||
1310 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
1311 | { | |
1312 | ||
1313 | switch (c->event) { | |
f60f6b8f | 1314 | case XFRM_MSG_EXPIRE: |
26b15dad | 1315 | return xfrm_exp_state_notify(x, c); |
f60f6b8f HX |
1316 | case XFRM_MSG_DELSA: |
1317 | case XFRM_MSG_UPDSA: | |
1318 | case XFRM_MSG_NEWSA: | |
26b15dad | 1319 | return xfrm_notify_sa(x, c); |
f60f6b8f | 1320 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
1321 | return xfrm_notify_sa_flush(c); |
1322 | default: | |
1323 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
1324 | break; | |
1325 | } | |
1326 | ||
1327 | return 0; | |
1328 | ||
1329 | } | |
1330 | ||
1da177e4 LT |
1331 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
1332 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
1333 | int dir) | |
1334 | { | |
1335 | struct xfrm_user_acquire *ua; | |
1336 | struct nlmsghdr *nlh; | |
1337 | unsigned char *b = skb->tail; | |
1338 | __u32 seq = xfrm_get_acqseq(); | |
1339 | ||
1340 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, | |
1341 | sizeof(*ua)); | |
1342 | ua = NLMSG_DATA(nlh); | |
1343 | nlh->nlmsg_flags = 0; | |
1344 | ||
1345 | memcpy(&ua->id, &x->id, sizeof(ua->id)); | |
1346 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
1347 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
1348 | copy_to_user_policy(xp, &ua->policy, dir); | |
1349 | ua->aalgos = xt->aalgos; | |
1350 | ua->ealgos = xt->ealgos; | |
1351 | ua->calgos = xt->calgos; | |
1352 | ua->seq = x->km.seq = seq; | |
1353 | ||
1354 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1355 | goto nlmsg_failure; | |
df71837d TJ |
1356 | if (copy_to_user_sec_ctx(xp, skb)) |
1357 | goto nlmsg_failure; | |
1da177e4 LT |
1358 | |
1359 | nlh->nlmsg_len = skb->tail - b; | |
1360 | return skb->len; | |
1361 | ||
1362 | nlmsg_failure: | |
1363 | skb_trim(skb, b - skb->data); | |
1364 | return -1; | |
1365 | } | |
1366 | ||
1367 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
1368 | struct xfrm_policy *xp, int dir) | |
1369 | { | |
1370 | struct sk_buff *skb; | |
1371 | size_t len; | |
1372 | ||
1373 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
1374 | len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); | |
df71837d | 1375 | len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); |
1da177e4 LT |
1376 | skb = alloc_skb(len, GFP_ATOMIC); |
1377 | if (skb == NULL) | |
1378 | return -ENOMEM; | |
1379 | ||
1380 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
1381 | BUG(); | |
1382 | ||
ac6d439d PM |
1383 | NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; |
1384 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); | |
1da177e4 LT |
1385 | } |
1386 | ||
1387 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
1388 | * or more templates. | |
1389 | */ | |
1390 | static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt, | |
1391 | u8 *data, int len, int *dir) | |
1392 | { | |
1393 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
1394 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
1395 | struct xfrm_policy *xp; | |
1396 | int nr; | |
1397 | ||
1398 | switch (family) { | |
1399 | case AF_INET: | |
1400 | if (opt != IP_XFRM_POLICY) { | |
1401 | *dir = -EOPNOTSUPP; | |
1402 | return NULL; | |
1403 | } | |
1404 | break; | |
1405 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1406 | case AF_INET6: | |
1407 | if (opt != IPV6_XFRM_POLICY) { | |
1408 | *dir = -EOPNOTSUPP; | |
1409 | return NULL; | |
1410 | } | |
1411 | break; | |
1412 | #endif | |
1413 | default: | |
1414 | *dir = -EINVAL; | |
1415 | return NULL; | |
1416 | } | |
1417 | ||
1418 | *dir = -EINVAL; | |
1419 | ||
1420 | if (len < sizeof(*p) || | |
1421 | verify_newpolicy_info(p)) | |
1422 | return NULL; | |
1423 | ||
1424 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
1425 | if (nr > XFRM_MAX_DEPTH) | |
1426 | return NULL; | |
1427 | ||
a4f1bac6 HX |
1428 | if (p->dir > XFRM_POLICY_OUT) |
1429 | return NULL; | |
1430 | ||
1da177e4 LT |
1431 | xp = xfrm_policy_alloc(GFP_KERNEL); |
1432 | if (xp == NULL) { | |
1433 | *dir = -ENOBUFS; | |
1434 | return NULL; | |
1435 | } | |
1436 | ||
1437 | copy_from_user_policy(xp, p); | |
1438 | copy_templates(xp, ut, nr); | |
1439 | ||
1440 | *dir = p->dir; | |
1441 | ||
1442 | return xp; | |
1443 | } | |
1444 | ||
1445 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, | |
1446 | int dir, int hard) | |
1447 | { | |
1448 | struct xfrm_user_polexpire *upe; | |
1449 | struct nlmsghdr *nlh; | |
1450 | unsigned char *b = skb->tail; | |
1451 | ||
1452 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); | |
1453 | upe = NLMSG_DATA(nlh); | |
1454 | nlh->nlmsg_flags = 0; | |
1455 | ||
1456 | copy_to_user_policy(xp, &upe->pol, dir); | |
1457 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1458 | goto nlmsg_failure; | |
df71837d TJ |
1459 | if (copy_to_user_sec_ctx(xp, skb)) |
1460 | goto nlmsg_failure; | |
1da177e4 LT |
1461 | upe->hard = !!hard; |
1462 | ||
1463 | nlh->nlmsg_len = skb->tail - b; | |
1464 | return skb->len; | |
1465 | ||
1466 | nlmsg_failure: | |
1467 | skb_trim(skb, b - skb->data); | |
1468 | return -1; | |
1469 | } | |
1470 | ||
26b15dad | 1471 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
1472 | { |
1473 | struct sk_buff *skb; | |
1474 | size_t len; | |
1475 | ||
1476 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
1477 | len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); | |
df71837d | 1478 | len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); |
1da177e4 LT |
1479 | skb = alloc_skb(len, GFP_ATOMIC); |
1480 | if (skb == NULL) | |
1481 | return -ENOMEM; | |
1482 | ||
bf08867f | 1483 | if (build_polexpire(skb, xp, dir, c->data.hard) < 0) |
1da177e4 LT |
1484 | BUG(); |
1485 | ||
ac6d439d PM |
1486 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
1487 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
1488 | } |
1489 | ||
26b15dad JHS |
1490 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
1491 | { | |
1492 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 1493 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
1494 | struct nlmsghdr *nlh; |
1495 | struct sk_buff *skb; | |
26b15dad JHS |
1496 | unsigned char *b; |
1497 | int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
0603eac0 HX |
1498 | int headlen; |
1499 | ||
1500 | headlen = sizeof(*p); | |
1501 | if (c->event == XFRM_MSG_DELPOLICY) { | |
1502 | len += RTA_SPACE(headlen); | |
1503 | headlen = sizeof(*id); | |
1504 | } | |
1505 | len += NLMSG_SPACE(headlen); | |
26b15dad JHS |
1506 | |
1507 | skb = alloc_skb(len, GFP_ATOMIC); | |
1508 | if (skb == NULL) | |
1509 | return -ENOMEM; | |
1510 | b = skb->tail; | |
1511 | ||
0603eac0 | 1512 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
1513 | |
1514 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
1515 | if (c->event == XFRM_MSG_DELPOLICY) { |
1516 | id = NLMSG_DATA(nlh); | |
1517 | memset(id, 0, sizeof(*id)); | |
1518 | id->dir = dir; | |
1519 | if (c->data.byid) | |
1520 | id->index = xp->index; | |
1521 | else | |
1522 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
1523 | ||
1524 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); | |
1525 | } | |
26b15dad JHS |
1526 | |
1527 | nlh->nlmsg_flags = 0; | |
1528 | ||
1529 | copy_to_user_policy(xp, p, dir); | |
1530 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1531 | goto nlmsg_failure; | |
1532 | ||
1533 | nlh->nlmsg_len = skb->tail - b; | |
1534 | ||
ac6d439d PM |
1535 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
1536 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
1537 | |
1538 | nlmsg_failure: | |
0603eac0 | 1539 | rtattr_failure: |
26b15dad JHS |
1540 | kfree_skb(skb); |
1541 | return -1; | |
1542 | } | |
1543 | ||
1544 | static int xfrm_notify_policy_flush(struct km_event *c) | |
1545 | { | |
1546 | struct nlmsghdr *nlh; | |
1547 | struct sk_buff *skb; | |
1548 | unsigned char *b; | |
1549 | int len = NLMSG_LENGTH(0); | |
1550 | ||
1551 | skb = alloc_skb(len, GFP_ATOMIC); | |
1552 | if (skb == NULL) | |
1553 | return -ENOMEM; | |
1554 | b = skb->tail; | |
1555 | ||
1556 | ||
1557 | nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); | |
1558 | ||
1559 | nlh->nlmsg_len = skb->tail - b; | |
1560 | ||
ac6d439d PM |
1561 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
1562 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
1563 | |
1564 | nlmsg_failure: | |
1565 | kfree_skb(skb); | |
1566 | return -1; | |
1567 | } | |
1568 | ||
1569 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
1570 | { | |
1571 | ||
1572 | switch (c->event) { | |
f60f6b8f HX |
1573 | case XFRM_MSG_NEWPOLICY: |
1574 | case XFRM_MSG_UPDPOLICY: | |
1575 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 1576 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 1577 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 1578 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 1579 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
1580 | return xfrm_exp_policy_notify(xp, dir, c); |
1581 | default: | |
1582 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
1583 | } | |
1584 | ||
1585 | return 0; | |
1586 | ||
1587 | } | |
1588 | ||
1da177e4 LT |
1589 | static struct xfrm_mgr netlink_mgr = { |
1590 | .id = "netlink", | |
1591 | .notify = xfrm_send_state_notify, | |
1592 | .acquire = xfrm_send_acquire, | |
1593 | .compile_policy = xfrm_compile_policy, | |
1594 | .notify_policy = xfrm_send_policy_notify, | |
1595 | }; | |
1596 | ||
1597 | static int __init xfrm_user_init(void) | |
1598 | { | |
1599 | printk(KERN_INFO "Initializing IPsec netlink socket\n"); | |
1600 | ||
06628607 PM |
1601 | xfrm_nl = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, |
1602 | xfrm_netlink_rcv, THIS_MODULE); | |
1da177e4 LT |
1603 | if (xfrm_nl == NULL) |
1604 | return -ENOMEM; | |
1605 | ||
1606 | xfrm_register_km(&netlink_mgr); | |
1607 | ||
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | static void __exit xfrm_user_exit(void) | |
1612 | { | |
1613 | xfrm_unregister_km(&netlink_mgr); | |
1614 | sock_release(xfrm_nl->sk_socket); | |
1615 | } | |
1616 | ||
1617 | module_init(xfrm_user_init); | |
1618 | module_exit(xfrm_user_exit); | |
1619 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 1620 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |