]>
Commit | Line | Data |
---|---|---|
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 | ||
9409f38a | 13 | #include <linux/crypto.h> |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/net.h> | |
21 | #include <linux/skbuff.h> | |
1da177e4 LT |
22 | #include <linux/rtnetlink.h> |
23 | #include <linux/pfkeyv2.h> | |
24 | #include <linux/ipsec.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/security.h> | |
27 | #include <net/sock.h> | |
28 | #include <net/xfrm.h> | |
88fc2c84 | 29 | #include <net/netlink.h> |
1da177e4 | 30 | #include <asm/uaccess.h> |
e23c7194 MN |
31 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
32 | #include <linux/in6.h> | |
33 | #endif | |
161a09e7 | 34 | #include <linux/audit.h> |
1da177e4 | 35 | |
1da177e4 LT |
36 | static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) |
37 | { | |
38 | struct rtattr *rt = xfrma[type - 1]; | |
39 | struct xfrm_algo *algp; | |
31c26852 | 40 | int len; |
1da177e4 LT |
41 | |
42 | if (!rt) | |
43 | return 0; | |
44 | ||
31c26852 HX |
45 | len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); |
46 | if (len < 0) | |
1da177e4 LT |
47 | return -EINVAL; |
48 | ||
49 | algp = RTA_DATA(rt); | |
31c26852 | 50 | |
a716c119 | 51 | len -= (algp->alg_key_len + 7U) / 8; |
31c26852 HX |
52 | if (len < 0) |
53 | return -EINVAL; | |
54 | ||
1da177e4 LT |
55 | switch (type) { |
56 | case XFRMA_ALG_AUTH: | |
57 | if (!algp->alg_key_len && | |
58 | strcmp(algp->alg_name, "digest_null") != 0) | |
59 | return -EINVAL; | |
60 | break; | |
61 | ||
62 | case XFRMA_ALG_CRYPT: | |
63 | if (!algp->alg_key_len && | |
64 | strcmp(algp->alg_name, "cipher_null") != 0) | |
65 | return -EINVAL; | |
66 | break; | |
67 | ||
68 | case XFRMA_ALG_COMP: | |
69 | /* Zero length keys are legal. */ | |
70 | break; | |
71 | ||
72 | default: | |
73 | return -EINVAL; | |
74 | }; | |
75 | ||
76 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static int verify_encap_tmpl(struct rtattr **xfrma) | |
81 | { | |
82 | struct rtattr *rt = xfrma[XFRMA_ENCAP - 1]; | |
83 | struct xfrm_encap_tmpl *encap; | |
84 | ||
85 | if (!rt) | |
86 | return 0; | |
87 | ||
88 | if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap)) | |
89 | return -EINVAL; | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
eb2971b6 MN |
94 | static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type, |
95 | xfrm_address_t **addrp) | |
96 | { | |
97 | struct rtattr *rt = xfrma[type - 1]; | |
98 | ||
99 | if (!rt) | |
100 | return 0; | |
101 | ||
102 | if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp)) | |
103 | return -EINVAL; | |
104 | ||
105 | if (addrp) | |
106 | *addrp = RTA_DATA(rt); | |
107 | ||
108 | return 0; | |
109 | } | |
df71837d TJ |
110 | |
111 | static inline int verify_sec_ctx_len(struct rtattr **xfrma) | |
112 | { | |
113 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1]; | |
114 | struct xfrm_user_sec_ctx *uctx; | |
115 | int len = 0; | |
116 | ||
117 | if (!rt) | |
118 | return 0; | |
119 | ||
120 | if (rt->rta_len < sizeof(*uctx)) | |
121 | return -EINVAL; | |
122 | ||
123 | uctx = RTA_DATA(rt); | |
124 | ||
df71837d TJ |
125 | len += sizeof(struct xfrm_user_sec_ctx); |
126 | len += uctx->ctx_len; | |
127 | ||
128 | if (uctx->len != len) | |
129 | return -EINVAL; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | ||
1da177e4 LT |
135 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
136 | struct rtattr **xfrma) | |
137 | { | |
138 | int err; | |
139 | ||
140 | err = -EINVAL; | |
141 | switch (p->family) { | |
142 | case AF_INET: | |
143 | break; | |
144 | ||
145 | case AF_INET6: | |
146 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
147 | break; | |
148 | #else | |
149 | err = -EAFNOSUPPORT; | |
150 | goto out; | |
151 | #endif | |
152 | ||
153 | default: | |
154 | goto out; | |
155 | }; | |
156 | ||
157 | err = -EINVAL; | |
158 | switch (p->id.proto) { | |
159 | case IPPROTO_AH: | |
160 | if (!xfrma[XFRMA_ALG_AUTH-1] || | |
161 | xfrma[XFRMA_ALG_CRYPT-1] || | |
162 | xfrma[XFRMA_ALG_COMP-1]) | |
163 | goto out; | |
164 | break; | |
165 | ||
166 | case IPPROTO_ESP: | |
167 | if ((!xfrma[XFRMA_ALG_AUTH-1] && | |
168 | !xfrma[XFRMA_ALG_CRYPT-1]) || | |
169 | xfrma[XFRMA_ALG_COMP-1]) | |
170 | goto out; | |
171 | break; | |
172 | ||
173 | case IPPROTO_COMP: | |
174 | if (!xfrma[XFRMA_ALG_COMP-1] || | |
175 | xfrma[XFRMA_ALG_AUTH-1] || | |
176 | xfrma[XFRMA_ALG_CRYPT-1]) | |
177 | goto out; | |
178 | break; | |
179 | ||
e23c7194 MN |
180 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
181 | case IPPROTO_DSTOPTS: | |
182 | case IPPROTO_ROUTING: | |
183 | if (xfrma[XFRMA_ALG_COMP-1] || | |
184 | xfrma[XFRMA_ALG_AUTH-1] || | |
185 | xfrma[XFRMA_ALG_CRYPT-1] || | |
186 | xfrma[XFRMA_ENCAP-1] || | |
187 | xfrma[XFRMA_SEC_CTX-1] || | |
188 | !xfrma[XFRMA_COADDR-1]) | |
189 | goto out; | |
190 | break; | |
191 | #endif | |
192 | ||
1da177e4 LT |
193 | default: |
194 | goto out; | |
195 | }; | |
196 | ||
197 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH))) | |
198 | goto out; | |
199 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT))) | |
200 | goto out; | |
201 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP))) | |
202 | goto out; | |
203 | if ((err = verify_encap_tmpl(xfrma))) | |
204 | goto out; | |
df71837d TJ |
205 | if ((err = verify_sec_ctx_len(xfrma))) |
206 | goto out; | |
060f02a3 NT |
207 | if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL))) |
208 | goto out; | |
1da177e4 LT |
209 | |
210 | err = -EINVAL; | |
211 | switch (p->mode) { | |
7e49e6de MN |
212 | case XFRM_MODE_TRANSPORT: |
213 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 214 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 215 | case XFRM_MODE_BEET: |
1da177e4 LT |
216 | break; |
217 | ||
218 | default: | |
219 | goto out; | |
220 | }; | |
221 | ||
222 | err = 0; | |
223 | ||
224 | out: | |
225 | return err; | |
226 | } | |
227 | ||
228 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
229 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
230 | struct rtattr *u_arg) | |
231 | { | |
232 | struct rtattr *rta = u_arg; | |
233 | struct xfrm_algo *p, *ualg; | |
234 | struct xfrm_algo_desc *algo; | |
b9e9dead | 235 | int len; |
1da177e4 LT |
236 | |
237 | if (!rta) | |
238 | return 0; | |
239 | ||
240 | ualg = RTA_DATA(rta); | |
241 | ||
242 | algo = get_byname(ualg->alg_name, 1); | |
243 | if (!algo) | |
244 | return -ENOSYS; | |
245 | *props = algo->desc.sadb_alg_id; | |
246 | ||
b9e9dead | 247 | len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8; |
cdbc6dae | 248 | p = kmemdup(ualg, len, GFP_KERNEL); |
1da177e4 LT |
249 | if (!p) |
250 | return -ENOMEM; | |
251 | ||
04ff1260 | 252 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
253 | *algpp = p; |
254 | return 0; | |
255 | } | |
256 | ||
257 | static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg) | |
258 | { | |
259 | struct rtattr *rta = u_arg; | |
260 | struct xfrm_encap_tmpl *p, *uencap; | |
261 | ||
262 | if (!rta) | |
263 | return 0; | |
264 | ||
265 | uencap = RTA_DATA(rta); | |
cdbc6dae | 266 | p = kmemdup(uencap, sizeof(*p), GFP_KERNEL); |
1da177e4 LT |
267 | if (!p) |
268 | return -ENOMEM; | |
269 | ||
1da177e4 LT |
270 | *encapp = p; |
271 | return 0; | |
272 | } | |
273 | ||
df71837d | 274 | |
661697f7 | 275 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 276 | { |
df71837d TJ |
277 | int len = 0; |
278 | ||
279 | if (xfrm_ctx) { | |
280 | len += sizeof(struct xfrm_user_sec_ctx); | |
281 | len += xfrm_ctx->ctx_len; | |
282 | } | |
283 | return len; | |
284 | } | |
285 | ||
286 | static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg) | |
287 | { | |
288 | struct xfrm_user_sec_ctx *uctx; | |
289 | ||
290 | if (!u_arg) | |
291 | return 0; | |
292 | ||
293 | uctx = RTA_DATA(u_arg); | |
294 | return security_xfrm_state_alloc(x, uctx); | |
295 | } | |
296 | ||
060f02a3 NT |
297 | static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg) |
298 | { | |
299 | struct rtattr *rta = u_arg; | |
300 | xfrm_address_t *p, *uaddrp; | |
301 | ||
302 | if (!rta) | |
303 | return 0; | |
304 | ||
305 | uaddrp = RTA_DATA(rta); | |
cdbc6dae | 306 | p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL); |
060f02a3 NT |
307 | if (!p) |
308 | return -ENOMEM; | |
309 | ||
060f02a3 NT |
310 | *addrpp = p; |
311 | return 0; | |
312 | } | |
313 | ||
1da177e4 LT |
314 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
315 | { | |
316 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
317 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
318 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
319 | x->props.mode = p->mode; | |
320 | x->props.replay_window = p->replay_window; | |
321 | x->props.reqid = p->reqid; | |
322 | x->props.family = p->family; | |
54489c14 | 323 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 LT |
324 | x->props.flags = p->flags; |
325 | } | |
326 | ||
d51d081d JHS |
327 | /* |
328 | * someday when pfkey also has support, we could have the code | |
329 | * somehow made shareable and move it to xfrm_state.c - JHS | |
330 | * | |
331 | */ | |
332 | static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma) | |
333 | { | |
334 | int err = - EINVAL; | |
335 | struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; | |
336 | struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; | |
337 | struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1]; | |
338 | struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1]; | |
339 | ||
340 | if (rp) { | |
341 | struct xfrm_replay_state *replay; | |
342 | if (RTA_PAYLOAD(rp) < sizeof(*replay)) | |
343 | goto error; | |
344 | replay = RTA_DATA(rp); | |
345 | memcpy(&x->replay, replay, sizeof(*replay)); | |
346 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
347 | } | |
348 | ||
349 | if (lt) { | |
350 | struct xfrm_lifetime_cur *ltime; | |
351 | if (RTA_PAYLOAD(lt) < sizeof(*ltime)) | |
352 | goto error; | |
353 | ltime = RTA_DATA(lt); | |
354 | x->curlft.bytes = ltime->bytes; | |
355 | x->curlft.packets = ltime->packets; | |
356 | x->curlft.add_time = ltime->add_time; | |
357 | x->curlft.use_time = ltime->use_time; | |
358 | } | |
359 | ||
360 | if (et) { | |
361 | if (RTA_PAYLOAD(et) < sizeof(u32)) | |
362 | goto error; | |
363 | x->replay_maxage = *(u32*)RTA_DATA(et); | |
364 | } | |
365 | ||
366 | if (rt) { | |
367 | if (RTA_PAYLOAD(rt) < sizeof(u32)) | |
368 | goto error; | |
369 | x->replay_maxdiff = *(u32*)RTA_DATA(rt); | |
370 | } | |
371 | ||
372 | return 0; | |
373 | error: | |
374 | return err; | |
375 | } | |
376 | ||
1da177e4 LT |
377 | static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, |
378 | struct rtattr **xfrma, | |
379 | int *errp) | |
380 | { | |
381 | struct xfrm_state *x = xfrm_state_alloc(); | |
382 | int err = -ENOMEM; | |
383 | ||
384 | if (!x) | |
385 | goto error_no_put; | |
386 | ||
387 | copy_from_user_state(x, p); | |
388 | ||
389 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, | |
390 | xfrm_aalg_get_byname, | |
391 | xfrma[XFRMA_ALG_AUTH-1]))) | |
392 | goto error; | |
393 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
394 | xfrm_ealg_get_byname, | |
395 | xfrma[XFRMA_ALG_CRYPT-1]))) | |
396 | goto error; | |
397 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
398 | xfrm_calg_get_byname, | |
399 | xfrma[XFRMA_ALG_COMP-1]))) | |
400 | goto error; | |
401 | if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) | |
402 | goto error; | |
060f02a3 NT |
403 | if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1]))) |
404 | goto error; | |
72cb6962 | 405 | err = xfrm_init_state(x); |
1da177e4 LT |
406 | if (err) |
407 | goto error; | |
408 | ||
df71837d TJ |
409 | if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) |
410 | goto error; | |
411 | ||
1da177e4 | 412 | x->km.seq = p->seq; |
d51d081d JHS |
413 | x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; |
414 | /* sysctl_xfrm_aevent_etime is in 100ms units */ | |
415 | x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; | |
416 | x->preplay.bitmap = 0; | |
417 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
418 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
419 | ||
420 | /* override default values from above */ | |
421 | ||
422 | err = xfrm_update_ae_params(x, (struct rtattr **)xfrma); | |
423 | if (err < 0) | |
424 | goto error; | |
1da177e4 LT |
425 | |
426 | return x; | |
427 | ||
428 | error: | |
429 | x->km.state = XFRM_STATE_DEAD; | |
430 | xfrm_state_put(x); | |
431 | error_no_put: | |
432 | *errp = err; | |
433 | return NULL; | |
434 | } | |
435 | ||
22e70050 CH |
436 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
437 | struct rtattr **xfrma) | |
1da177e4 LT |
438 | { |
439 | struct xfrm_usersa_info *p = NLMSG_DATA(nlh); | |
440 | struct xfrm_state *x; | |
441 | int err; | |
26b15dad | 442 | struct km_event c; |
1da177e4 | 443 | |
22e70050 | 444 | err = verify_newsa_info(p, xfrma); |
1da177e4 LT |
445 | if (err) |
446 | return err; | |
447 | ||
22e70050 | 448 | x = xfrm_state_construct(p, xfrma, &err); |
1da177e4 LT |
449 | if (!x) |
450 | return err; | |
451 | ||
26b15dad | 452 | xfrm_state_hold(x); |
1da177e4 LT |
453 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
454 | err = xfrm_state_add(x); | |
455 | else | |
456 | err = xfrm_state_update(x); | |
457 | ||
161a09e7 JL |
458 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
459 | AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x); | |
460 | ||
1da177e4 LT |
461 | if (err < 0) { |
462 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 463 | __xfrm_state_put(x); |
7d6dfe1f | 464 | goto out; |
1da177e4 LT |
465 | } |
466 | ||
26b15dad JHS |
467 | c.seq = nlh->nlmsg_seq; |
468 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 469 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
470 | |
471 | km_state_notify(x, &c); | |
7d6dfe1f | 472 | out: |
26b15dad | 473 | xfrm_state_put(x); |
1da177e4 LT |
474 | return err; |
475 | } | |
476 | ||
eb2971b6 MN |
477 | static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, |
478 | struct rtattr **xfrma, | |
479 | int *errp) | |
480 | { | |
481 | struct xfrm_state *x = NULL; | |
482 | int err; | |
483 | ||
484 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
485 | err = -ESRCH; | |
486 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
487 | } else { | |
488 | xfrm_address_t *saddr = NULL; | |
489 | ||
490 | err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr); | |
491 | if (err) | |
492 | goto out; | |
493 | ||
494 | if (!saddr) { | |
495 | err = -EINVAL; | |
496 | goto out; | |
497 | } | |
498 | ||
9abbffee | 499 | err = -ESRCH; |
eb2971b6 MN |
500 | x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, |
501 | p->family); | |
502 | } | |
503 | ||
504 | out: | |
505 | if (!x && errp) | |
506 | *errp = err; | |
507 | return x; | |
508 | } | |
509 | ||
22e70050 CH |
510 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
511 | struct rtattr **xfrma) | |
1da177e4 LT |
512 | { |
513 | struct xfrm_state *x; | |
eb2971b6 | 514 | int err = -ESRCH; |
26b15dad | 515 | struct km_event c; |
1da177e4 LT |
516 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); |
517 | ||
22e70050 | 518 | x = xfrm_user_state_lookup(p, xfrma, &err); |
1da177e4 | 519 | if (x == NULL) |
eb2971b6 | 520 | return err; |
1da177e4 | 521 | |
6f68dc37 | 522 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
523 | goto out; |
524 | ||
1da177e4 | 525 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
526 | err = -EPERM; |
527 | goto out; | |
1da177e4 LT |
528 | } |
529 | ||
26b15dad | 530 | err = xfrm_state_delete(x); |
161a09e7 | 531 | |
c8c05a8e CZ |
532 | if (err < 0) |
533 | goto out; | |
26b15dad JHS |
534 | |
535 | c.seq = nlh->nlmsg_seq; | |
536 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 537 | c.event = nlh->nlmsg_type; |
26b15dad | 538 | km_state_notify(x, &c); |
1da177e4 | 539 | |
c8c05a8e | 540 | out: |
16bec31d EP |
541 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
542 | AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x); | |
c8c05a8e | 543 | xfrm_state_put(x); |
26b15dad | 544 | return err; |
1da177e4 LT |
545 | } |
546 | ||
547 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
548 | { | |
549 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
550 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
551 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
552 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
553 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 554 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
555 | p->mode = x->props.mode; |
556 | p->replay_window = x->props.replay_window; | |
557 | p->reqid = x->props.reqid; | |
558 | p->family = x->props.family; | |
559 | p->flags = x->props.flags; | |
560 | p->seq = x->km.seq; | |
561 | } | |
562 | ||
563 | struct xfrm_dump_info { | |
564 | struct sk_buff *in_skb; | |
565 | struct sk_buff *out_skb; | |
566 | u32 nlmsg_seq; | |
567 | u16 nlmsg_flags; | |
568 | int start_idx; | |
569 | int this_idx; | |
570 | }; | |
571 | ||
572 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
573 | { | |
574 | struct xfrm_dump_info *sp = ptr; | |
575 | struct sk_buff *in_skb = sp->in_skb; | |
576 | struct sk_buff *skb = sp->out_skb; | |
577 | struct xfrm_usersa_info *p; | |
578 | struct nlmsghdr *nlh; | |
27a884dc | 579 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
580 | |
581 | if (sp->this_idx < sp->start_idx) | |
582 | goto out; | |
583 | ||
584 | nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, | |
585 | sp->nlmsg_seq, | |
586 | XFRM_MSG_NEWSA, sizeof(*p)); | |
587 | nlh->nlmsg_flags = sp->nlmsg_flags; | |
588 | ||
589 | p = NLMSG_DATA(nlh); | |
590 | copy_to_user_state(x, p); | |
591 | ||
592 | if (x->aalg) | |
593 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
594 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
595 | if (x->ealg) | |
596 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
597 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
598 | if (x->calg) | |
599 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
600 | ||
601 | if (x->encap) | |
602 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
603 | ||
df71837d TJ |
604 | if (x->security) { |
605 | int ctx_size = sizeof(struct xfrm_sec_ctx) + | |
606 | x->security->ctx_len; | |
607 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
608 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
609 | ||
610 | uctx->exttype = XFRMA_SEC_CTX; | |
611 | uctx->len = ctx_size; | |
612 | uctx->ctx_doi = x->security->ctx_doi; | |
613 | uctx->ctx_alg = x->security->ctx_alg; | |
614 | uctx->ctx_len = x->security->ctx_len; | |
615 | memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); | |
616 | } | |
060f02a3 NT |
617 | |
618 | if (x->coaddr) | |
619 | RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
620 | ||
9afaca05 MN |
621 | if (x->lastused) |
622 | RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused); | |
623 | ||
27a884dc | 624 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
625 | out: |
626 | sp->this_idx++; | |
627 | return 0; | |
628 | ||
629 | nlmsg_failure: | |
630 | rtattr_failure: | |
dc5fc579 | 631 | nlmsg_trim(skb, b); |
1da177e4 LT |
632 | return -1; |
633 | } | |
634 | ||
635 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) | |
636 | { | |
637 | struct xfrm_dump_info info; | |
638 | ||
639 | info.in_skb = cb->skb; | |
640 | info.out_skb = skb; | |
641 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
642 | info.nlmsg_flags = NLM_F_MULTI; | |
643 | info.this_idx = 0; | |
644 | info.start_idx = cb->args[0]; | |
dc00a525 | 645 | (void) xfrm_state_walk(0, dump_one_state, &info); |
1da177e4 LT |
646 | cb->args[0] = info.this_idx; |
647 | ||
648 | return skb->len; | |
649 | } | |
650 | ||
651 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
652 | struct xfrm_state *x, u32 seq) | |
653 | { | |
654 | struct xfrm_dump_info info; | |
655 | struct sk_buff *skb; | |
656 | ||
657 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); | |
658 | if (!skb) | |
659 | return ERR_PTR(-ENOMEM); | |
660 | ||
1da177e4 LT |
661 | info.in_skb = in_skb; |
662 | info.out_skb = skb; | |
663 | info.nlmsg_seq = seq; | |
664 | info.nlmsg_flags = 0; | |
665 | info.this_idx = info.start_idx = 0; | |
666 | ||
667 | if (dump_one_state(x, 0, &info)) { | |
668 | kfree_skb(skb); | |
669 | return NULL; | |
670 | } | |
671 | ||
672 | return skb; | |
673 | } | |
674 | ||
22e70050 CH |
675 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
676 | struct rtattr **xfrma) | |
1da177e4 LT |
677 | { |
678 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); | |
679 | struct xfrm_state *x; | |
680 | struct sk_buff *resp_skb; | |
eb2971b6 | 681 | int err = -ESRCH; |
1da177e4 | 682 | |
22e70050 | 683 | x = xfrm_user_state_lookup(p, xfrma, &err); |
1da177e4 LT |
684 | if (x == NULL) |
685 | goto out_noput; | |
686 | ||
687 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
688 | if (IS_ERR(resp_skb)) { | |
689 | err = PTR_ERR(resp_skb); | |
690 | } else { | |
691 | err = netlink_unicast(xfrm_nl, resp_skb, | |
692 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
693 | } | |
694 | xfrm_state_put(x); | |
695 | out_noput: | |
696 | return err; | |
697 | } | |
698 | ||
699 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
700 | { | |
701 | switch (p->info.id.proto) { | |
702 | case IPPROTO_AH: | |
703 | case IPPROTO_ESP: | |
704 | break; | |
705 | ||
706 | case IPPROTO_COMP: | |
707 | /* IPCOMP spi is 16-bits. */ | |
708 | if (p->max >= 0x10000) | |
709 | return -EINVAL; | |
710 | break; | |
711 | ||
712 | default: | |
713 | return -EINVAL; | |
714 | }; | |
715 | ||
716 | if (p->min > p->max) | |
717 | return -EINVAL; | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
22e70050 CH |
722 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
723 | struct rtattr **xfrma) | |
1da177e4 LT |
724 | { |
725 | struct xfrm_state *x; | |
726 | struct xfrm_userspi_info *p; | |
727 | struct sk_buff *resp_skb; | |
728 | xfrm_address_t *daddr; | |
729 | int family; | |
730 | int err; | |
731 | ||
732 | p = NLMSG_DATA(nlh); | |
733 | err = verify_userspi_info(p); | |
734 | if (err) | |
735 | goto out_noput; | |
736 | ||
737 | family = p->info.family; | |
738 | daddr = &p->info.id.daddr; | |
739 | ||
740 | x = NULL; | |
741 | if (p->info.seq) { | |
742 | x = xfrm_find_acq_byseq(p->info.seq); | |
743 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
744 | xfrm_state_put(x); | |
745 | x = NULL; | |
746 | } | |
747 | } | |
748 | ||
749 | if (!x) | |
750 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
751 | p->info.id.proto, daddr, | |
752 | &p->info.saddr, 1, | |
753 | family); | |
754 | err = -ENOENT; | |
755 | if (x == NULL) | |
756 | goto out_noput; | |
757 | ||
758 | resp_skb = ERR_PTR(-ENOENT); | |
759 | ||
760 | spin_lock_bh(&x->lock); | |
761 | if (x->km.state != XFRM_STATE_DEAD) { | |
762 | xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); | |
763 | if (x->id.spi) | |
764 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
765 | } | |
766 | spin_unlock_bh(&x->lock); | |
767 | ||
768 | if (IS_ERR(resp_skb)) { | |
769 | err = PTR_ERR(resp_skb); | |
770 | goto out; | |
771 | } | |
772 | ||
773 | err = netlink_unicast(xfrm_nl, resp_skb, | |
774 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
775 | ||
776 | out: | |
777 | xfrm_state_put(x); | |
778 | out_noput: | |
779 | return err; | |
780 | } | |
781 | ||
b798a9ed | 782 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
783 | { |
784 | switch (dir) { | |
785 | case XFRM_POLICY_IN: | |
786 | case XFRM_POLICY_OUT: | |
787 | case XFRM_POLICY_FWD: | |
788 | break; | |
789 | ||
790 | default: | |
791 | return -EINVAL; | |
792 | }; | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
b798a9ed | 797 | static int verify_policy_type(u8 type) |
f7b6983f MN |
798 | { |
799 | switch (type) { | |
800 | case XFRM_POLICY_TYPE_MAIN: | |
801 | #ifdef CONFIG_XFRM_SUB_POLICY | |
802 | case XFRM_POLICY_TYPE_SUB: | |
803 | #endif | |
804 | break; | |
805 | ||
806 | default: | |
807 | return -EINVAL; | |
808 | }; | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
1da177e4 LT |
813 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
814 | { | |
815 | switch (p->share) { | |
816 | case XFRM_SHARE_ANY: | |
817 | case XFRM_SHARE_SESSION: | |
818 | case XFRM_SHARE_USER: | |
819 | case XFRM_SHARE_UNIQUE: | |
820 | break; | |
821 | ||
822 | default: | |
823 | return -EINVAL; | |
824 | }; | |
825 | ||
826 | switch (p->action) { | |
827 | case XFRM_POLICY_ALLOW: | |
828 | case XFRM_POLICY_BLOCK: | |
829 | break; | |
830 | ||
831 | default: | |
832 | return -EINVAL; | |
833 | }; | |
834 | ||
835 | switch (p->sel.family) { | |
836 | case AF_INET: | |
837 | break; | |
838 | ||
839 | case AF_INET6: | |
840 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
841 | break; | |
842 | #else | |
843 | return -EAFNOSUPPORT; | |
844 | #endif | |
845 | ||
846 | default: | |
847 | return -EINVAL; | |
848 | }; | |
849 | ||
850 | return verify_policy_dir(p->dir); | |
851 | } | |
852 | ||
df71837d TJ |
853 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) |
854 | { | |
855 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; | |
856 | struct xfrm_user_sec_ctx *uctx; | |
857 | ||
858 | if (!rt) | |
859 | return 0; | |
860 | ||
861 | uctx = RTA_DATA(rt); | |
862 | return security_xfrm_policy_alloc(pol, uctx); | |
863 | } | |
864 | ||
1da177e4 LT |
865 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
866 | int nr) | |
867 | { | |
868 | int i; | |
869 | ||
870 | xp->xfrm_nr = nr; | |
871 | for (i = 0; i < nr; i++, ut++) { | |
872 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
873 | ||
874 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
875 | memcpy(&t->saddr, &ut->saddr, | |
876 | sizeof(xfrm_address_t)); | |
877 | t->reqid = ut->reqid; | |
878 | t->mode = ut->mode; | |
879 | t->share = ut->share; | |
880 | t->optional = ut->optional; | |
881 | t->aalgos = ut->aalgos; | |
882 | t->ealgos = ut->ealgos; | |
883 | t->calgos = ut->calgos; | |
8511d01d | 884 | t->encap_family = ut->family; |
1da177e4 LT |
885 | } |
886 | } | |
887 | ||
b4ad86bf DM |
888 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
889 | { | |
890 | int i; | |
891 | ||
892 | if (nr > XFRM_MAX_DEPTH) | |
893 | return -EINVAL; | |
894 | ||
895 | for (i = 0; i < nr; i++) { | |
896 | /* We never validated the ut->family value, so many | |
897 | * applications simply leave it at zero. The check was | |
898 | * never made and ut->family was ignored because all | |
899 | * templates could be assumed to have the same family as | |
900 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
901 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
902 | */ | |
903 | if (!ut[i].family) | |
904 | ut[i].family = family; | |
905 | ||
906 | switch (ut[i].family) { | |
907 | case AF_INET: | |
908 | break; | |
909 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
910 | case AF_INET6: | |
911 | break; | |
912 | #endif | |
913 | default: | |
914 | return -EINVAL; | |
915 | }; | |
916 | } | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
1da177e4 LT |
921 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) |
922 | { | |
923 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
1da177e4 LT |
924 | |
925 | if (!rt) { | |
926 | pol->xfrm_nr = 0; | |
927 | } else { | |
b4ad86bf DM |
928 | struct xfrm_user_tmpl *utmpl = RTA_DATA(rt); |
929 | int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); | |
930 | int err; | |
1da177e4 | 931 | |
b4ad86bf DM |
932 | err = validate_tmpl(nr, utmpl, pol->family); |
933 | if (err) | |
934 | return err; | |
1da177e4 LT |
935 | |
936 | copy_templates(pol, RTA_DATA(rt), nr); | |
937 | } | |
938 | return 0; | |
939 | } | |
940 | ||
f7b6983f MN |
941 | static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma) |
942 | { | |
943 | struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1]; | |
944 | struct xfrm_userpolicy_type *upt; | |
b798a9ed | 945 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
946 | int err; |
947 | ||
948 | if (rt) { | |
949 | if (rt->rta_len < sizeof(*upt)) | |
950 | return -EINVAL; | |
951 | ||
952 | upt = RTA_DATA(rt); | |
953 | type = upt->type; | |
954 | } | |
955 | ||
956 | err = verify_policy_type(type); | |
957 | if (err) | |
958 | return err; | |
959 | ||
960 | *tp = type; | |
961 | return 0; | |
962 | } | |
963 | ||
1da177e4 LT |
964 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
965 | { | |
966 | xp->priority = p->priority; | |
967 | xp->index = p->index; | |
968 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
969 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
970 | xp->action = p->action; | |
971 | xp->flags = p->flags; | |
972 | xp->family = p->sel.family; | |
973 | /* XXX xp->share = p->share; */ | |
974 | } | |
975 | ||
976 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
977 | { | |
978 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
979 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
980 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
981 | p->priority = xp->priority; | |
982 | p->index = xp->index; | |
983 | p->sel.family = xp->family; | |
984 | p->dir = dir; | |
985 | p->action = xp->action; | |
986 | p->flags = xp->flags; | |
987 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
988 | } | |
989 | ||
990 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) | |
991 | { | |
992 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
993 | int err; | |
994 | ||
995 | if (!xp) { | |
996 | *errp = -ENOMEM; | |
997 | return NULL; | |
998 | } | |
999 | ||
1000 | copy_from_user_policy(xp, p); | |
df71837d | 1001 | |
f7b6983f MN |
1002 | err = copy_from_user_policy_type(&xp->type, xfrma); |
1003 | if (err) | |
1004 | goto error; | |
1005 | ||
df71837d TJ |
1006 | if (!(err = copy_from_user_tmpl(xp, xfrma))) |
1007 | err = copy_from_user_sec_ctx(xp, xfrma); | |
f7b6983f MN |
1008 | if (err) |
1009 | goto error; | |
1da177e4 LT |
1010 | |
1011 | return xp; | |
f7b6983f MN |
1012 | error: |
1013 | *errp = err; | |
1014 | kfree(xp); | |
1015 | return NULL; | |
1da177e4 LT |
1016 | } |
1017 | ||
22e70050 CH |
1018 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1019 | struct rtattr **xfrma) | |
1da177e4 LT |
1020 | { |
1021 | struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); | |
1022 | struct xfrm_policy *xp; | |
26b15dad | 1023 | struct km_event c; |
1da177e4 LT |
1024 | int err; |
1025 | int excl; | |
1026 | ||
1027 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1028 | if (err) |
1029 | return err; | |
22e70050 | 1030 | err = verify_sec_ctx_len(xfrma); |
1da177e4 LT |
1031 | if (err) |
1032 | return err; | |
1033 | ||
22e70050 | 1034 | xp = xfrm_policy_construct(p, xfrma, &err); |
1da177e4 LT |
1035 | if (!xp) |
1036 | return err; | |
1037 | ||
26b15dad JHS |
1038 | /* shouldnt excl be based on nlh flags?? |
1039 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1040 | * in netlink excl is a flag and you wouldnt need | |
1041 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1042 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1043 | err = xfrm_policy_insert(p->dir, xp, excl); | |
161a09e7 JL |
1044 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1045 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1046 | ||
1da177e4 | 1047 | if (err) { |
5f8ac64b | 1048 | security_xfrm_policy_free(xp); |
1da177e4 LT |
1049 | kfree(xp); |
1050 | return err; | |
1051 | } | |
1052 | ||
f60f6b8f | 1053 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1054 | c.seq = nlh->nlmsg_seq; |
1055 | c.pid = nlh->nlmsg_pid; | |
1056 | km_policy_notify(xp, p->dir, &c); | |
1057 | ||
1da177e4 LT |
1058 | xfrm_pol_put(xp); |
1059 | ||
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1064 | { | |
1065 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1066 | int i; | |
1067 | ||
1068 | if (xp->xfrm_nr == 0) | |
1069 | return 0; | |
1070 | ||
1071 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1072 | struct xfrm_user_tmpl *up = &vec[i]; | |
1073 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1074 | ||
1075 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1076 | up->family = kp->encap_family; |
1da177e4 LT |
1077 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1078 | up->reqid = kp->reqid; | |
1079 | up->mode = kp->mode; | |
1080 | up->share = kp->share; | |
1081 | up->optional = kp->optional; | |
1082 | up->aalgos = kp->aalgos; | |
1083 | up->ealgos = kp->ealgos; | |
1084 | up->calgos = kp->calgos; | |
1085 | } | |
1086 | RTA_PUT(skb, XFRMA_TMPL, | |
1087 | (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), | |
1088 | vec); | |
1089 | ||
1090 | return 0; | |
1091 | ||
1092 | rtattr_failure: | |
1093 | return -1; | |
1094 | } | |
1095 | ||
0d681623 | 1096 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
df71837d | 1097 | { |
0d681623 SH |
1098 | int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len; |
1099 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
1100 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1101 | ||
1102 | uctx->exttype = XFRMA_SEC_CTX; | |
1103 | uctx->len = ctx_size; | |
1104 | uctx->ctx_doi = s->ctx_doi; | |
1105 | uctx->ctx_alg = s->ctx_alg; | |
1106 | uctx->ctx_len = s->ctx_len; | |
1107 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
a716c119 | 1108 | return 0; |
df71837d | 1109 | |
0d681623 SH |
1110 | rtattr_failure: |
1111 | return -1; | |
1112 | } | |
1113 | ||
1114 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1115 | { | |
1116 | if (x->security) { | |
1117 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1118 | } |
1119 | return 0; | |
0d681623 | 1120 | } |
df71837d | 1121 | |
0d681623 SH |
1122 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1123 | { | |
1124 | if (xp->security) { | |
1125 | return copy_sec_ctx(xp->security, skb); | |
1126 | } | |
1127 | return 0; | |
df71837d TJ |
1128 | } |
1129 | ||
f7b6983f | 1130 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1131 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1132 | { |
1133 | struct xfrm_userpolicy_type upt; | |
1134 | ||
1135 | memset(&upt, 0, sizeof(upt)); | |
1459bb36 | 1136 | upt.type = type; |
f7b6983f MN |
1137 | |
1138 | RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); | |
1139 | ||
1140 | return 0; | |
1141 | ||
1142 | rtattr_failure: | |
1143 | return -1; | |
1144 | } | |
1145 | ||
1146 | #else | |
b798a9ed | 1147 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1148 | { |
1149 | return 0; | |
1150 | } | |
1151 | #endif | |
1152 | ||
1da177e4 LT |
1153 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1154 | { | |
1155 | struct xfrm_dump_info *sp = ptr; | |
1156 | struct xfrm_userpolicy_info *p; | |
1157 | struct sk_buff *in_skb = sp->in_skb; | |
1158 | struct sk_buff *skb = sp->out_skb; | |
1159 | struct nlmsghdr *nlh; | |
27a884dc | 1160 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
1161 | |
1162 | if (sp->this_idx < sp->start_idx) | |
1163 | goto out; | |
1164 | ||
1165 | nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, | |
1166 | sp->nlmsg_seq, | |
1167 | XFRM_MSG_NEWPOLICY, sizeof(*p)); | |
1168 | p = NLMSG_DATA(nlh); | |
1169 | nlh->nlmsg_flags = sp->nlmsg_flags; | |
1170 | ||
1171 | copy_to_user_policy(xp, p, dir); | |
1172 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1173 | goto nlmsg_failure; | |
df71837d TJ |
1174 | if (copy_to_user_sec_ctx(xp, skb)) |
1175 | goto nlmsg_failure; | |
1459bb36 | 1176 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1177 | goto nlmsg_failure; |
1da177e4 | 1178 | |
27a884dc | 1179 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
1180 | out: |
1181 | sp->this_idx++; | |
1182 | return 0; | |
1183 | ||
1184 | nlmsg_failure: | |
dc5fc579 | 1185 | nlmsg_trim(skb, b); |
1da177e4 LT |
1186 | return -1; |
1187 | } | |
1188 | ||
1189 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
1190 | { | |
1191 | struct xfrm_dump_info info; | |
1192 | ||
1193 | info.in_skb = cb->skb; | |
1194 | info.out_skb = skb; | |
1195 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1196 | info.nlmsg_flags = NLM_F_MULTI; | |
1197 | info.this_idx = 0; | |
1198 | info.start_idx = cb->args[0]; | |
f7b6983f MN |
1199 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); |
1200 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1201 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); | |
1202 | #endif | |
1da177e4 LT |
1203 | cb->args[0] = info.this_idx; |
1204 | ||
1205 | return skb->len; | |
1206 | } | |
1207 | ||
1208 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1209 | struct xfrm_policy *xp, | |
1210 | int dir, u32 seq) | |
1211 | { | |
1212 | struct xfrm_dump_info info; | |
1213 | struct sk_buff *skb; | |
1214 | ||
1215 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1216 | if (!skb) | |
1217 | return ERR_PTR(-ENOMEM); | |
1218 | ||
1da177e4 LT |
1219 | info.in_skb = in_skb; |
1220 | info.out_skb = skb; | |
1221 | info.nlmsg_seq = seq; | |
1222 | info.nlmsg_flags = 0; | |
1223 | info.this_idx = info.start_idx = 0; | |
1224 | ||
1225 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1226 | kfree_skb(skb); | |
1227 | return NULL; | |
1228 | } | |
1229 | ||
1230 | return skb; | |
1231 | } | |
1232 | ||
22e70050 CH |
1233 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1234 | struct rtattr **xfrma) | |
1da177e4 LT |
1235 | { |
1236 | struct xfrm_policy *xp; | |
1237 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1238 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1239 | int err; |
26b15dad | 1240 | struct km_event c; |
1da177e4 LT |
1241 | int delete; |
1242 | ||
1243 | p = NLMSG_DATA(nlh); | |
1244 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; | |
1245 | ||
22e70050 | 1246 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1247 | if (err) |
1248 | return err; | |
1249 | ||
1da177e4 LT |
1250 | err = verify_policy_dir(p->dir); |
1251 | if (err) | |
1252 | return err; | |
1253 | ||
1254 | if (p->index) | |
ef41aaa0 | 1255 | xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); |
df71837d | 1256 | else { |
22e70050 | 1257 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; |
df71837d TJ |
1258 | struct xfrm_policy tmp; |
1259 | ||
22e70050 | 1260 | err = verify_sec_ctx_len(xfrma); |
df71837d TJ |
1261 | if (err) |
1262 | return err; | |
1263 | ||
1264 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1265 | if (rt) { | |
1266 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1267 | ||
1268 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1269 | return err; | |
1270 | } | |
ef41aaa0 EP |
1271 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1272 | delete, &err); | |
df71837d TJ |
1273 | security_xfrm_policy_free(&tmp); |
1274 | } | |
1da177e4 LT |
1275 | if (xp == NULL) |
1276 | return -ENOENT; | |
1277 | ||
1278 | if (!delete) { | |
1279 | struct sk_buff *resp_skb; | |
1280 | ||
1281 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1282 | if (IS_ERR(resp_skb)) { | |
1283 | err = PTR_ERR(resp_skb); | |
1284 | } else { | |
1285 | err = netlink_unicast(xfrm_nl, resp_skb, | |
1286 | NETLINK_CB(skb).pid, | |
1287 | MSG_DONTWAIT); | |
1288 | } | |
26b15dad | 1289 | } else { |
13fcfbb0 DM |
1290 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1291 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1292 | ||
1293 | if (err != 0) | |
c8c05a8e | 1294 | goto out; |
13fcfbb0 | 1295 | |
e7443892 | 1296 | c.data.byid = p->index; |
f60f6b8f | 1297 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1298 | c.seq = nlh->nlmsg_seq; |
1299 | c.pid = nlh->nlmsg_pid; | |
1300 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1301 | } |
1302 | ||
c8c05a8e | 1303 | out: |
ef41aaa0 | 1304 | xfrm_pol_put(xp); |
1da177e4 LT |
1305 | return err; |
1306 | } | |
1307 | ||
22e70050 CH |
1308 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
1309 | struct rtattr **xfrma) | |
1da177e4 | 1310 | { |
26b15dad | 1311 | struct km_event c; |
1da177e4 | 1312 | struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); |
161a09e7 | 1313 | struct xfrm_audit audit_info; |
1da177e4 | 1314 | |
161a09e7 JL |
1315 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1316 | audit_info.secid = NETLINK_CB(skb).sid; | |
1317 | xfrm_state_flush(p->proto, &audit_info); | |
bf08867f | 1318 | c.data.proto = p->proto; |
f60f6b8f | 1319 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1320 | c.seq = nlh->nlmsg_seq; |
1321 | c.pid = nlh->nlmsg_pid; | |
1322 | km_state_notify(NULL, &c); | |
1323 | ||
1da177e4 LT |
1324 | return 0; |
1325 | } | |
1326 | ||
d51d081d JHS |
1327 | |
1328 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1329 | { | |
1330 | struct xfrm_aevent_id *id; | |
1331 | struct nlmsghdr *nlh; | |
1332 | struct xfrm_lifetime_cur ltime; | |
27a884dc | 1333 | unsigned char *b = skb_tail_pointer(skb); |
d51d081d JHS |
1334 | |
1335 | nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id)); | |
1336 | id = NLMSG_DATA(nlh); | |
1337 | nlh->nlmsg_flags = 0; | |
1338 | ||
2b5f6dcc | 1339 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1340 | id->sa_id.spi = x->id.spi; |
1341 | id->sa_id.family = x->props.family; | |
1342 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1343 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1344 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1345 | id->flags = c->data.aevent; |
1346 | ||
1347 | RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); | |
1348 | ||
1349 | ltime.bytes = x->curlft.bytes; | |
1350 | ltime.packets = x->curlft.packets; | |
1351 | ltime.add_time = x->curlft.add_time; | |
1352 | ltime.use_time = x->curlft.use_time; | |
1353 | ||
1354 | RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); | |
1355 | ||
1356 | if (id->flags&XFRM_AE_RTHR) { | |
1357 | RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); | |
1358 | } | |
1359 | ||
1360 | if (id->flags&XFRM_AE_ETHR) { | |
1361 | u32 etimer = x->replay_maxage*10/HZ; | |
1362 | RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); | |
1363 | } | |
1364 | ||
27a884dc | 1365 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
d51d081d JHS |
1366 | return skb->len; |
1367 | ||
1368 | rtattr_failure: | |
1369 | nlmsg_failure: | |
dc5fc579 | 1370 | nlmsg_trim(skb, b); |
d51d081d JHS |
1371 | return -1; |
1372 | } | |
1373 | ||
22e70050 CH |
1374 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
1375 | struct rtattr **xfrma) | |
d51d081d JHS |
1376 | { |
1377 | struct xfrm_state *x; | |
1378 | struct sk_buff *r_skb; | |
1379 | int err; | |
1380 | struct km_event c; | |
1381 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1382 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
1383 | struct xfrm_usersa_id *id = &p->sa_id; | |
1384 | ||
1385 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
1386 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
1387 | ||
1388 | if (p->flags&XFRM_AE_RTHR) | |
1389 | len+=RTA_SPACE(sizeof(u32)); | |
1390 | ||
1391 | if (p->flags&XFRM_AE_ETHR) | |
1392 | len+=RTA_SPACE(sizeof(u32)); | |
1393 | ||
1394 | r_skb = alloc_skb(len, GFP_ATOMIC); | |
1395 | if (r_skb == NULL) | |
1396 | return -ENOMEM; | |
1397 | ||
1398 | x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); | |
1399 | if (x == NULL) { | |
b08d5840 | 1400 | kfree_skb(r_skb); |
d51d081d JHS |
1401 | return -ESRCH; |
1402 | } | |
1403 | ||
1404 | /* | |
1405 | * XXX: is this lock really needed - none of the other | |
1406 | * gets lock (the concern is things getting updated | |
1407 | * while we are still reading) - jhs | |
1408 | */ | |
1409 | spin_lock_bh(&x->lock); | |
1410 | c.data.aevent = p->flags; | |
1411 | c.seq = nlh->nlmsg_seq; | |
1412 | c.pid = nlh->nlmsg_pid; | |
1413 | ||
1414 | if (build_aevent(r_skb, x, &c) < 0) | |
1415 | BUG(); | |
1416 | err = netlink_unicast(xfrm_nl, r_skb, | |
1417 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1418 | spin_unlock_bh(&x->lock); | |
1419 | xfrm_state_put(x); | |
1420 | return err; | |
1421 | } | |
1422 | ||
22e70050 CH |
1423 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
1424 | struct rtattr **xfrma) | |
d51d081d JHS |
1425 | { |
1426 | struct xfrm_state *x; | |
1427 | struct km_event c; | |
1428 | int err = - EINVAL; | |
1429 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1430 | struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; | |
1431 | struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; | |
1432 | ||
1433 | if (!lt && !rp) | |
1434 | return err; | |
1435 | ||
1436 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1437 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1438 | return err; | |
1439 | ||
1440 | x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
1441 | if (x == NULL) | |
1442 | return -ESRCH; | |
1443 | ||
1444 | if (x->km.state != XFRM_STATE_VALID) | |
1445 | goto out; | |
1446 | ||
1447 | spin_lock_bh(&x->lock); | |
22e70050 | 1448 | err = xfrm_update_ae_params(x, xfrma); |
d51d081d JHS |
1449 | spin_unlock_bh(&x->lock); |
1450 | if (err < 0) | |
1451 | goto out; | |
1452 | ||
1453 | c.event = nlh->nlmsg_type; | |
1454 | c.seq = nlh->nlmsg_seq; | |
1455 | c.pid = nlh->nlmsg_pid; | |
1456 | c.data.aevent = XFRM_AE_CU; | |
1457 | km_state_notify(x, &c); | |
1458 | err = 0; | |
1459 | out: | |
1460 | xfrm_state_put(x); | |
1461 | return err; | |
1462 | } | |
1463 | ||
22e70050 CH |
1464 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1465 | struct rtattr **xfrma) | |
1da177e4 | 1466 | { |
f7b6983f | 1467 | struct km_event c; |
b798a9ed | 1468 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1469 | int err; |
161a09e7 | 1470 | struct xfrm_audit audit_info; |
f7b6983f | 1471 | |
22e70050 | 1472 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1473 | if (err) |
1474 | return err; | |
26b15dad | 1475 | |
161a09e7 JL |
1476 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1477 | audit_info.secid = NETLINK_CB(skb).sid; | |
1478 | xfrm_policy_flush(type, &audit_info); | |
f7b6983f | 1479 | c.data.type = type; |
f60f6b8f | 1480 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1481 | c.seq = nlh->nlmsg_seq; |
1482 | c.pid = nlh->nlmsg_pid; | |
1483 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1484 | return 0; |
1485 | } | |
1486 | ||
22e70050 CH |
1487 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1488 | struct rtattr **xfrma) | |
6c5c8ca7 JHS |
1489 | { |
1490 | struct xfrm_policy *xp; | |
1491 | struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); | |
1492 | struct xfrm_userpolicy_info *p = &up->pol; | |
b798a9ed | 1493 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1494 | int err = -ENOENT; |
1495 | ||
22e70050 | 1496 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1497 | if (err) |
1498 | return err; | |
1499 | ||
6c5c8ca7 | 1500 | if (p->index) |
ef41aaa0 | 1501 | xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1502 | else { |
22e70050 | 1503 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; |
6c5c8ca7 JHS |
1504 | struct xfrm_policy tmp; |
1505 | ||
22e70050 | 1506 | err = verify_sec_ctx_len(xfrma); |
6c5c8ca7 JHS |
1507 | if (err) |
1508 | return err; | |
1509 | ||
1510 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1511 | if (rt) { | |
1512 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1513 | ||
1514 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1515 | return err; | |
1516 | } | |
ef41aaa0 EP |
1517 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1518 | 0, &err); | |
6c5c8ca7 JHS |
1519 | security_xfrm_policy_free(&tmp); |
1520 | } | |
1521 | ||
1522 | if (xp == NULL) | |
ef41aaa0 EP |
1523 | return -ENOENT; |
1524 | read_lock(&xp->lock); | |
6c5c8ca7 JHS |
1525 | if (xp->dead) { |
1526 | read_unlock(&xp->lock); | |
1527 | goto out; | |
1528 | } | |
1529 | ||
1530 | read_unlock(&xp->lock); | |
1531 | err = 0; | |
1532 | if (up->hard) { | |
1533 | xfrm_policy_delete(xp, p->dir); | |
161a09e7 JL |
1534 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1535 | AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL); | |
1536 | ||
6c5c8ca7 JHS |
1537 | } else { |
1538 | // reset the timers here? | |
1539 | printk("Dont know what to do with soft policy expire\n"); | |
1540 | } | |
1541 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1542 | ||
1543 | out: | |
1544 | xfrm_pol_put(xp); | |
1545 | return err; | |
1546 | } | |
1547 | ||
22e70050 CH |
1548 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1549 | struct rtattr **xfrma) | |
53bc6b4d JHS |
1550 | { |
1551 | struct xfrm_state *x; | |
1552 | int err; | |
1553 | struct xfrm_user_expire *ue = NLMSG_DATA(nlh); | |
1554 | struct xfrm_usersa_info *p = &ue->state; | |
1555 | ||
1556 | x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); | |
53bc6b4d | 1557 | |
3a765aa5 | 1558 | err = -ENOENT; |
53bc6b4d JHS |
1559 | if (x == NULL) |
1560 | return err; | |
1561 | ||
53bc6b4d | 1562 | spin_lock_bh(&x->lock); |
3a765aa5 | 1563 | err = -EINVAL; |
53bc6b4d JHS |
1564 | if (x->km.state != XFRM_STATE_VALID) |
1565 | goto out; | |
1566 | km_state_expired(x, ue->hard, current->pid); | |
1567 | ||
161a09e7 | 1568 | if (ue->hard) { |
53bc6b4d | 1569 | __xfrm_state_delete(x); |
161a09e7 JL |
1570 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1571 | AUDIT_MAC_IPSEC_DELSA, 1, NULL, x); | |
1572 | } | |
3a765aa5 | 1573 | err = 0; |
53bc6b4d JHS |
1574 | out: |
1575 | spin_unlock_bh(&x->lock); | |
1576 | xfrm_state_put(x); | |
1577 | return err; | |
1578 | } | |
1579 | ||
22e70050 CH |
1580 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1581 | struct rtattr **xfrma) | |
980ebd25 JHS |
1582 | { |
1583 | struct xfrm_policy *xp; | |
1584 | struct xfrm_user_tmpl *ut; | |
1585 | int i; | |
1586 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
1587 | ||
1588 | struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); | |
1589 | struct xfrm_state *x = xfrm_state_alloc(); | |
1590 | int err = -ENOMEM; | |
1591 | ||
1592 | if (!x) | |
1593 | return err; | |
1594 | ||
1595 | err = verify_newpolicy_info(&ua->policy); | |
1596 | if (err) { | |
1597 | printk("BAD policy passed\n"); | |
1598 | kfree(x); | |
1599 | return err; | |
1600 | } | |
1601 | ||
1602 | /* build an XP */ | |
b4ad86bf DM |
1603 | xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); |
1604 | if (!xp) { | |
980ebd25 JHS |
1605 | kfree(x); |
1606 | return err; | |
1607 | } | |
1608 | ||
1609 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1610 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1611 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1612 | ||
1613 | ut = RTA_DATA(rt); | |
1614 | /* extract the templates and for each call km_key */ | |
1615 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1616 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1617 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1618 | x->props.mode = t->mode; | |
1619 | x->props.reqid = t->reqid; | |
1620 | x->props.family = ut->family; | |
1621 | t->aalgos = ua->aalgos; | |
1622 | t->ealgos = ua->ealgos; | |
1623 | t->calgos = ua->calgos; | |
1624 | err = km_query(x, t, xp); | |
1625 | ||
1626 | } | |
1627 | ||
1628 | kfree(x); | |
1629 | kfree(xp); | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
5c79de6e SS |
1634 | #ifdef CONFIG_XFRM_MIGRATE |
1635 | static int verify_user_migrate(struct rtattr **xfrma) | |
1636 | { | |
1637 | struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; | |
1638 | struct xfrm_user_migrate *um; | |
1639 | ||
1640 | if (!rt) | |
1641 | return -EINVAL; | |
1642 | ||
1643 | if ((rt->rta_len - sizeof(*rt)) < sizeof(*um)) | |
1644 | return -EINVAL; | |
1645 | ||
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | static int copy_from_user_migrate(struct xfrm_migrate *ma, | |
1650 | struct rtattr **xfrma, int *num) | |
1651 | { | |
1652 | struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; | |
1653 | struct xfrm_user_migrate *um; | |
1654 | int i, num_migrate; | |
1655 | ||
1656 | um = RTA_DATA(rt); | |
1657 | num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um); | |
1658 | ||
1659 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1660 | return -EINVAL; | |
1661 | ||
1662 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1663 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1664 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1665 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1666 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1667 | ||
1668 | ma->proto = um->proto; | |
1669 | ma->mode = um->mode; | |
1670 | ma->reqid = um->reqid; | |
1671 | ||
1672 | ma->old_family = um->old_family; | |
1673 | ma->new_family = um->new_family; | |
1674 | } | |
1675 | ||
1676 | *num = i; | |
1677 | return 0; | |
1678 | } | |
1679 | ||
1680 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
1681 | struct rtattr **xfrma) | |
1682 | { | |
1683 | struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh); | |
1684 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
1685 | u8 type; | |
1686 | int err; | |
1687 | int n = 0; | |
1688 | ||
1689 | err = verify_user_migrate((struct rtattr **)xfrma); | |
1690 | if (err) | |
1691 | return err; | |
1692 | ||
1693 | err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma); | |
1694 | if (err) | |
1695 | return err; | |
1696 | ||
1697 | err = copy_from_user_migrate((struct xfrm_migrate *)m, | |
1698 | (struct rtattr **)xfrma, &n); | |
1699 | if (err) | |
1700 | return err; | |
1701 | ||
1702 | if (!n) | |
1703 | return 0; | |
1704 | ||
1705 | xfrm_migrate(&pi->sel, pi->dir, type, m, n); | |
1706 | ||
1707 | return 0; | |
1708 | } | |
1709 | #else | |
1710 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
1711 | struct rtattr **xfrma) | |
1712 | { | |
1713 | return -ENOPROTOOPT; | |
1714 | } | |
1715 | #endif | |
1716 | ||
1717 | #ifdef CONFIG_XFRM_MIGRATE | |
1718 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1719 | { | |
1720 | struct xfrm_user_migrate um; | |
1721 | ||
1722 | memset(&um, 0, sizeof(um)); | |
1723 | um.proto = m->proto; | |
1724 | um.mode = m->mode; | |
1725 | um.reqid = m->reqid; | |
1726 | um.old_family = m->old_family; | |
1727 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1728 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1729 | um.new_family = m->new_family; | |
1730 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1731 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1732 | ||
1733 | RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um); | |
1734 | return 0; | |
1735 | ||
1736 | rtattr_failure: | |
1737 | return -1; | |
1738 | } | |
1739 | ||
1740 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, | |
1741 | int num_migrate, struct xfrm_selector *sel, | |
1742 | u8 dir, u8 type) | |
1743 | { | |
1744 | struct xfrm_migrate *mp; | |
1745 | struct xfrm_userpolicy_id *pol_id; | |
1746 | struct nlmsghdr *nlh; | |
27a884dc | 1747 | unsigned char *b = skb_tail_pointer(skb); |
5c79de6e SS |
1748 | int i; |
1749 | ||
1750 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id)); | |
1751 | pol_id = NLMSG_DATA(nlh); | |
1752 | nlh->nlmsg_flags = 0; | |
1753 | ||
1754 | /* copy data from selector, dir, and type to the pol_id */ | |
1755 | memset(pol_id, 0, sizeof(*pol_id)); | |
1756 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1757 | pol_id->dir = dir; | |
1758 | ||
1759 | if (copy_to_user_policy_type(type, skb) < 0) | |
1760 | goto nlmsg_failure; | |
1761 | ||
1762 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1763 | if (copy_to_user_migrate(mp, skb) < 0) | |
1764 | goto nlmsg_failure; | |
1765 | } | |
1766 | ||
27a884dc | 1767 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
5c79de6e SS |
1768 | return skb->len; |
1769 | nlmsg_failure: | |
dc5fc579 | 1770 | nlmsg_trim(skb, b); |
5c79de6e SS |
1771 | return -1; |
1772 | } | |
1773 | ||
1774 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1775 | struct xfrm_migrate *m, int num_migrate) | |
1776 | { | |
1777 | struct sk_buff *skb; | |
1778 | size_t len; | |
1779 | ||
1780 | len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate); | |
1781 | len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id)); | |
1782 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1783 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
1784 | #endif | |
1785 | skb = alloc_skb(len, GFP_ATOMIC); | |
1786 | if (skb == NULL) | |
1787 | return -ENOMEM; | |
1788 | ||
1789 | /* build migrate */ | |
1790 | if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) | |
1791 | BUG(); | |
1792 | ||
1793 | NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE; | |
1794 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, | |
1795 | GFP_ATOMIC); | |
1796 | } | |
1797 | #else | |
1798 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1799 | struct xfrm_migrate *m, int num_migrate) | |
1800 | { | |
1801 | return -ENOPROTOOPT; | |
1802 | } | |
1803 | #endif | |
d51d081d | 1804 | |
492b558b TG |
1805 | #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) |
1806 | ||
1807 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1808 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1809 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1810 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1811 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1812 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1813 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1814 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1815 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1816 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b TG |
1817 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
1818 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
6c5c8ca7 | 1819 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b TG |
1820 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
1821 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), | |
d51d081d JHS |
1822 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1823 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 1824 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 1825 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
1da177e4 LT |
1826 | }; |
1827 | ||
492b558b TG |
1828 | #undef XMSGSIZE |
1829 | ||
1da177e4 | 1830 | static struct xfrm_link { |
22e70050 | 1831 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **); |
1da177e4 | 1832 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
492b558b TG |
1833 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1834 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1835 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1836 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1837 | .dump = xfrm_dump_sa }, | |
1838 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1839 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1840 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1841 | .dump = xfrm_dump_policy }, | |
1842 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
980ebd25 | 1843 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1844 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1845 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1846 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1847 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1848 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1849 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1850 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1851 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 1852 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
1da177e4 LT |
1853 | }; |
1854 | ||
1d00a4eb | 1855 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
1856 | { |
1857 | struct rtattr *xfrma[XFRMA_MAX]; | |
1858 | struct xfrm_link *link; | |
c702e804 | 1859 | int type, min_len; |
1da177e4 | 1860 | |
1da177e4 | 1861 | type = nlh->nlmsg_type; |
1da177e4 | 1862 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 1863 | return -EINVAL; |
1da177e4 LT |
1864 | |
1865 | type -= XFRM_MSG_BASE; | |
1866 | link = &xfrm_dispatch[type]; | |
1867 | ||
1868 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
1869 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
1870 | return -EPERM; | |
1da177e4 | 1871 | |
492b558b TG |
1872 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1873 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1874 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 1875 | if (link->dump == NULL) |
1d00a4eb | 1876 | return -EINVAL; |
88fc2c84 | 1877 | |
c702e804 | 1878 | return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); |
1da177e4 LT |
1879 | } |
1880 | ||
1881 | memset(xfrma, 0, sizeof(xfrma)); | |
1882 | ||
1883 | if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) | |
1d00a4eb | 1884 | return -EINVAL; |
1da177e4 LT |
1885 | |
1886 | if (nlh->nlmsg_len > min_len) { | |
1887 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
1888 | struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); | |
1889 | ||
1890 | while (RTA_OK(attr, attrlen)) { | |
1891 | unsigned short flavor = attr->rta_type; | |
1892 | if (flavor) { | |
1893 | if (flavor > XFRMA_MAX) | |
1d00a4eb | 1894 | return -EINVAL; |
1da177e4 LT |
1895 | xfrma[flavor - 1] = attr; |
1896 | } | |
1897 | attr = RTA_NEXT(attr, attrlen); | |
1898 | } | |
1899 | } | |
1900 | ||
1901 | if (link->doit == NULL) | |
1d00a4eb | 1902 | return -EINVAL; |
1da177e4 | 1903 | |
1d00a4eb | 1904 | return link->doit(skb, nlh, xfrma); |
1da177e4 LT |
1905 | } |
1906 | ||
1da177e4 LT |
1907 | static void xfrm_netlink_rcv(struct sock *sk, int len) |
1908 | { | |
88fc2c84 | 1909 | unsigned int qlen = 0; |
2a0a6ebe | 1910 | |
1da177e4 | 1911 | do { |
4a3e2f71 | 1912 | mutex_lock(&xfrm_cfg_mutex); |
88fc2c84 | 1913 | netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); |
4a3e2f71 | 1914 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 | 1915 | |
2a0a6ebe | 1916 | } while (qlen); |
1da177e4 LT |
1917 | } |
1918 | ||
d51d081d | 1919 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1920 | { |
1921 | struct xfrm_user_expire *ue; | |
1922 | struct nlmsghdr *nlh; | |
27a884dc | 1923 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 1924 | |
d51d081d | 1925 | nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE, |
1da177e4 LT |
1926 | sizeof(*ue)); |
1927 | ue = NLMSG_DATA(nlh); | |
1928 | nlh->nlmsg_flags = 0; | |
1929 | ||
1930 | copy_to_user_state(x, &ue->state); | |
d51d081d | 1931 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 1932 | |
27a884dc | 1933 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
1934 | return skb->len; |
1935 | ||
1936 | nlmsg_failure: | |
dc5fc579 | 1937 | nlmsg_trim(skb, b); |
1da177e4 LT |
1938 | return -1; |
1939 | } | |
1940 | ||
26b15dad | 1941 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1942 | { |
1943 | struct sk_buff *skb; | |
ee57eef9 | 1944 | int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); |
1da177e4 | 1945 | |
ee57eef9 | 1946 | skb = alloc_skb(len, GFP_ATOMIC); |
1da177e4 LT |
1947 | if (skb == NULL) |
1948 | return -ENOMEM; | |
1949 | ||
d51d081d | 1950 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
1951 | BUG(); |
1952 | ||
ac6d439d PM |
1953 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
1954 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
1955 | } |
1956 | ||
d51d081d JHS |
1957 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
1958 | { | |
1959 | struct sk_buff *skb; | |
1960 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
1961 | ||
1962 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
1963 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
1964 | skb = alloc_skb(len, GFP_ATOMIC); | |
1965 | if (skb == NULL) | |
1966 | return -ENOMEM; | |
1967 | ||
1968 | if (build_aevent(skb, x, c) < 0) | |
1969 | BUG(); | |
1970 | ||
1971 | NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; | |
1972 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); | |
1973 | } | |
1974 | ||
26b15dad JHS |
1975 | static int xfrm_notify_sa_flush(struct km_event *c) |
1976 | { | |
1977 | struct xfrm_usersa_flush *p; | |
1978 | struct nlmsghdr *nlh; | |
1979 | struct sk_buff *skb; | |
27a884dc | 1980 | sk_buff_data_t b; |
26b15dad JHS |
1981 | int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); |
1982 | ||
1983 | skb = alloc_skb(len, GFP_ATOMIC); | |
1984 | if (skb == NULL) | |
1985 | return -ENOMEM; | |
1986 | b = skb->tail; | |
1987 | ||
1988 | nlh = NLMSG_PUT(skb, c->pid, c->seq, | |
1989 | XFRM_MSG_FLUSHSA, sizeof(*p)); | |
1990 | nlh->nlmsg_flags = 0; | |
1991 | ||
1992 | p = NLMSG_DATA(nlh); | |
bf08867f | 1993 | p->proto = c->data.proto; |
26b15dad JHS |
1994 | |
1995 | nlh->nlmsg_len = skb->tail - b; | |
1996 | ||
ac6d439d PM |
1997 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
1998 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
1999 | |
2000 | nlmsg_failure: | |
2001 | kfree_skb(skb); | |
2002 | return -1; | |
2003 | } | |
2004 | ||
b6f99a21 | 2005 | static inline int xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2006 | { |
0603eac0 | 2007 | int l = 0; |
26b15dad JHS |
2008 | if (x->aalg) |
2009 | l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); | |
2010 | if (x->ealg) | |
2011 | l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); | |
2012 | if (x->calg) | |
2013 | l += RTA_SPACE(sizeof(*x->calg)); | |
2014 | if (x->encap) | |
2015 | l += RTA_SPACE(sizeof(*x->encap)); | |
2016 | ||
2017 | return l; | |
2018 | } | |
2019 | ||
2020 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2021 | { | |
2022 | struct xfrm_usersa_info *p; | |
0603eac0 | 2023 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2024 | struct nlmsghdr *nlh; |
2025 | struct sk_buff *skb; | |
27a884dc | 2026 | sk_buff_data_t b; |
26b15dad | 2027 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2028 | int headlen; |
2029 | ||
2030 | headlen = sizeof(*p); | |
2031 | if (c->event == XFRM_MSG_DELSA) { | |
2032 | len += RTA_SPACE(headlen); | |
2033 | headlen = sizeof(*id); | |
2034 | } | |
2035 | len += NLMSG_SPACE(headlen); | |
26b15dad JHS |
2036 | |
2037 | skb = alloc_skb(len, GFP_ATOMIC); | |
2038 | if (skb == NULL) | |
2039 | return -ENOMEM; | |
2040 | b = skb->tail; | |
2041 | ||
0603eac0 | 2042 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
2043 | nlh->nlmsg_flags = 0; |
2044 | ||
2045 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
2046 | if (c->event == XFRM_MSG_DELSA) { |
2047 | id = NLMSG_DATA(nlh); | |
2048 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); | |
2049 | id->spi = x->id.spi; | |
2050 | id->family = x->props.family; | |
2051 | id->proto = x->id.proto; | |
2052 | ||
2053 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); | |
2054 | } | |
2055 | ||
26b15dad JHS |
2056 | copy_to_user_state(x, p); |
2057 | ||
2058 | if (x->aalg) | |
2059 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
2060 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
2061 | if (x->ealg) | |
2062 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
2063 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
2064 | if (x->calg) | |
2065 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
2066 | ||
2067 | if (x->encap) | |
2068 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
2069 | ||
2070 | nlh->nlmsg_len = skb->tail - b; | |
2071 | ||
ac6d439d PM |
2072 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
2073 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
2074 | |
2075 | nlmsg_failure: | |
2076 | rtattr_failure: | |
2077 | kfree_skb(skb); | |
2078 | return -1; | |
2079 | } | |
2080 | ||
2081 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2082 | { | |
2083 | ||
2084 | switch (c->event) { | |
f60f6b8f | 2085 | case XFRM_MSG_EXPIRE: |
26b15dad | 2086 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2087 | case XFRM_MSG_NEWAE: |
2088 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2089 | case XFRM_MSG_DELSA: |
2090 | case XFRM_MSG_UPDSA: | |
2091 | case XFRM_MSG_NEWSA: | |
26b15dad | 2092 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2093 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2094 | return xfrm_notify_sa_flush(c); |
2095 | default: | |
2096 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2097 | break; | |
2098 | } | |
2099 | ||
2100 | return 0; | |
2101 | ||
2102 | } | |
2103 | ||
1da177e4 LT |
2104 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2105 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2106 | int dir) | |
2107 | { | |
2108 | struct xfrm_user_acquire *ua; | |
2109 | struct nlmsghdr *nlh; | |
27a884dc | 2110 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
2111 | __u32 seq = xfrm_get_acqseq(); |
2112 | ||
2113 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, | |
2114 | sizeof(*ua)); | |
2115 | ua = NLMSG_DATA(nlh); | |
2116 | nlh->nlmsg_flags = 0; | |
2117 | ||
2118 | memcpy(&ua->id, &x->id, sizeof(ua->id)); | |
2119 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2120 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2121 | copy_to_user_policy(xp, &ua->policy, dir); | |
2122 | ua->aalgos = xt->aalgos; | |
2123 | ua->ealgos = xt->ealgos; | |
2124 | ua->calgos = xt->calgos; | |
2125 | ua->seq = x->km.seq = seq; | |
2126 | ||
2127 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2128 | goto nlmsg_failure; | |
0d681623 | 2129 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2130 | goto nlmsg_failure; |
1459bb36 | 2131 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2132 | goto nlmsg_failure; |
1da177e4 | 2133 | |
27a884dc | 2134 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
2135 | return skb->len; |
2136 | ||
2137 | nlmsg_failure: | |
dc5fc579 | 2138 | nlmsg_trim(skb, b); |
1da177e4 LT |
2139 | return -1; |
2140 | } | |
2141 | ||
2142 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2143 | struct xfrm_policy *xp, int dir) | |
2144 | { | |
2145 | struct sk_buff *skb; | |
2146 | size_t len; | |
2147 | ||
2148 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
2149 | len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); | |
661697f7 | 2150 | len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security)); |
785fd8b8 JHS |
2151 | #ifdef CONFIG_XFRM_SUB_POLICY |
2152 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2153 | #endif | |
1da177e4 LT |
2154 | skb = alloc_skb(len, GFP_ATOMIC); |
2155 | if (skb == NULL) | |
2156 | return -ENOMEM; | |
2157 | ||
2158 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2159 | BUG(); | |
2160 | ||
ac6d439d PM |
2161 | NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; |
2162 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); | |
1da177e4 LT |
2163 | } |
2164 | ||
2165 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2166 | * or more templates. | |
2167 | */ | |
cb969f07 | 2168 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2169 | u8 *data, int len, int *dir) |
2170 | { | |
2171 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
2172 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2173 | struct xfrm_policy *xp; | |
2174 | int nr; | |
2175 | ||
cb969f07 | 2176 | switch (sk->sk_family) { |
1da177e4 LT |
2177 | case AF_INET: |
2178 | if (opt != IP_XFRM_POLICY) { | |
2179 | *dir = -EOPNOTSUPP; | |
2180 | return NULL; | |
2181 | } | |
2182 | break; | |
2183 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2184 | case AF_INET6: | |
2185 | if (opt != IPV6_XFRM_POLICY) { | |
2186 | *dir = -EOPNOTSUPP; | |
2187 | return NULL; | |
2188 | } | |
2189 | break; | |
2190 | #endif | |
2191 | default: | |
2192 | *dir = -EINVAL; | |
2193 | return NULL; | |
2194 | } | |
2195 | ||
2196 | *dir = -EINVAL; | |
2197 | ||
2198 | if (len < sizeof(*p) || | |
2199 | verify_newpolicy_info(p)) | |
2200 | return NULL; | |
2201 | ||
2202 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2203 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2204 | return NULL; |
2205 | ||
a4f1bac6 HX |
2206 | if (p->dir > XFRM_POLICY_OUT) |
2207 | return NULL; | |
2208 | ||
1da177e4 LT |
2209 | xp = xfrm_policy_alloc(GFP_KERNEL); |
2210 | if (xp == NULL) { | |
2211 | *dir = -ENOBUFS; | |
2212 | return NULL; | |
2213 | } | |
2214 | ||
2215 | copy_from_user_policy(xp, p); | |
f7b6983f | 2216 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2217 | copy_templates(xp, ut, nr); |
2218 | ||
2219 | *dir = p->dir; | |
2220 | ||
2221 | return xp; | |
2222 | } | |
2223 | ||
2224 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, | |
d51d081d | 2225 | int dir, struct km_event *c) |
1da177e4 LT |
2226 | { |
2227 | struct xfrm_user_polexpire *upe; | |
2228 | struct nlmsghdr *nlh; | |
d51d081d | 2229 | int hard = c->data.hard; |
27a884dc | 2230 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 2231 | |
d51d081d | 2232 | nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); |
1da177e4 LT |
2233 | upe = NLMSG_DATA(nlh); |
2234 | nlh->nlmsg_flags = 0; | |
2235 | ||
2236 | copy_to_user_policy(xp, &upe->pol, dir); | |
2237 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2238 | goto nlmsg_failure; | |
df71837d TJ |
2239 | if (copy_to_user_sec_ctx(xp, skb)) |
2240 | goto nlmsg_failure; | |
1459bb36 | 2241 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2242 | goto nlmsg_failure; |
1da177e4 LT |
2243 | upe->hard = !!hard; |
2244 | ||
27a884dc | 2245 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
2246 | return skb->len; |
2247 | ||
2248 | nlmsg_failure: | |
dc5fc579 | 2249 | nlmsg_trim(skb, b); |
1da177e4 LT |
2250 | return -1; |
2251 | } | |
2252 | ||
26b15dad | 2253 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
2254 | { |
2255 | struct sk_buff *skb; | |
2256 | size_t len; | |
2257 | ||
2258 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
2259 | len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); | |
661697f7 | 2260 | len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security)); |
785fd8b8 JHS |
2261 | #ifdef CONFIG_XFRM_SUB_POLICY |
2262 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2263 | #endif | |
1da177e4 LT |
2264 | skb = alloc_skb(len, GFP_ATOMIC); |
2265 | if (skb == NULL) | |
2266 | return -ENOMEM; | |
2267 | ||
d51d081d | 2268 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2269 | BUG(); |
2270 | ||
ac6d439d PM |
2271 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
2272 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
2273 | } |
2274 | ||
26b15dad JHS |
2275 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2276 | { | |
2277 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 2278 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2279 | struct nlmsghdr *nlh; |
2280 | struct sk_buff *skb; | |
27a884dc | 2281 | sk_buff_data_t b; |
26b15dad | 2282 | int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2283 | int headlen; |
2284 | ||
2285 | headlen = sizeof(*p); | |
2286 | if (c->event == XFRM_MSG_DELPOLICY) { | |
2287 | len += RTA_SPACE(headlen); | |
2288 | headlen = sizeof(*id); | |
2289 | } | |
334f3d45 JHS |
2290 | #ifdef CONFIG_XFRM_SUB_POLICY |
2291 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2292 | #endif | |
0603eac0 | 2293 | len += NLMSG_SPACE(headlen); |
26b15dad JHS |
2294 | |
2295 | skb = alloc_skb(len, GFP_ATOMIC); | |
2296 | if (skb == NULL) | |
2297 | return -ENOMEM; | |
2298 | b = skb->tail; | |
2299 | ||
0603eac0 | 2300 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
2301 | |
2302 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
2303 | if (c->event == XFRM_MSG_DELPOLICY) { |
2304 | id = NLMSG_DATA(nlh); | |
2305 | memset(id, 0, sizeof(*id)); | |
2306 | id->dir = dir; | |
2307 | if (c->data.byid) | |
2308 | id->index = xp->index; | |
2309 | else | |
2310 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2311 | ||
2312 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); | |
2313 | } | |
26b15dad JHS |
2314 | |
2315 | nlh->nlmsg_flags = 0; | |
2316 | ||
2317 | copy_to_user_policy(xp, p, dir); | |
2318 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2319 | goto nlmsg_failure; | |
1459bb36 | 2320 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2321 | goto nlmsg_failure; |
26b15dad JHS |
2322 | |
2323 | nlh->nlmsg_len = skb->tail - b; | |
2324 | ||
ac6d439d PM |
2325 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
2326 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
2327 | |
2328 | nlmsg_failure: | |
0603eac0 | 2329 | rtattr_failure: |
26b15dad JHS |
2330 | kfree_skb(skb); |
2331 | return -1; | |
2332 | } | |
2333 | ||
2334 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2335 | { | |
2336 | struct nlmsghdr *nlh; | |
2337 | struct sk_buff *skb; | |
27a884dc | 2338 | sk_buff_data_t b; |
785fd8b8 | 2339 | int len = 0; |
f7b6983f | 2340 | #ifdef CONFIG_XFRM_SUB_POLICY |
785fd8b8 | 2341 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); |
f7b6983f | 2342 | #endif |
785fd8b8 | 2343 | len += NLMSG_LENGTH(0); |
26b15dad JHS |
2344 | |
2345 | skb = alloc_skb(len, GFP_ATOMIC); | |
2346 | if (skb == NULL) | |
2347 | return -ENOMEM; | |
2348 | b = skb->tail; | |
2349 | ||
2350 | ||
2351 | nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); | |
f7b6983f | 2352 | nlh->nlmsg_flags = 0; |
0c51f53c JHS |
2353 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2354 | goto nlmsg_failure; | |
26b15dad JHS |
2355 | |
2356 | nlh->nlmsg_len = skb->tail - b; | |
2357 | ||
ac6d439d PM |
2358 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
2359 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
2360 | |
2361 | nlmsg_failure: | |
2362 | kfree_skb(skb); | |
2363 | return -1; | |
2364 | } | |
2365 | ||
2366 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2367 | { | |
2368 | ||
2369 | switch (c->event) { | |
f60f6b8f HX |
2370 | case XFRM_MSG_NEWPOLICY: |
2371 | case XFRM_MSG_UPDPOLICY: | |
2372 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2373 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2374 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2375 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2376 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2377 | return xfrm_exp_policy_notify(xp, dir, c); |
2378 | default: | |
2379 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2380 | } | |
2381 | ||
2382 | return 0; | |
2383 | ||
2384 | } | |
2385 | ||
97a64b45 MN |
2386 | static int build_report(struct sk_buff *skb, u8 proto, |
2387 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2388 | { | |
2389 | struct xfrm_user_report *ur; | |
2390 | struct nlmsghdr *nlh; | |
27a884dc | 2391 | unsigned char *b = skb_tail_pointer(skb); |
97a64b45 MN |
2392 | |
2393 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur)); | |
2394 | ur = NLMSG_DATA(nlh); | |
2395 | nlh->nlmsg_flags = 0; | |
2396 | ||
2397 | ur->proto = proto; | |
2398 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2399 | ||
2400 | if (addr) | |
2401 | RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2402 | ||
27a884dc | 2403 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
97a64b45 MN |
2404 | return skb->len; |
2405 | ||
2406 | nlmsg_failure: | |
2407 | rtattr_failure: | |
dc5fc579 | 2408 | nlmsg_trim(skb, b); |
97a64b45 MN |
2409 | return -1; |
2410 | } | |
2411 | ||
2412 | static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, | |
2413 | xfrm_address_t *addr) | |
2414 | { | |
2415 | struct sk_buff *skb; | |
2416 | size_t len; | |
2417 | ||
2418 | len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report))); | |
2419 | skb = alloc_skb(len, GFP_ATOMIC); | |
2420 | if (skb == NULL) | |
2421 | return -ENOMEM; | |
2422 | ||
2423 | if (build_report(skb, proto, sel, addr) < 0) | |
2424 | BUG(); | |
2425 | ||
2426 | NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT; | |
2427 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); | |
2428 | } | |
2429 | ||
1da177e4 LT |
2430 | static struct xfrm_mgr netlink_mgr = { |
2431 | .id = "netlink", | |
2432 | .notify = xfrm_send_state_notify, | |
2433 | .acquire = xfrm_send_acquire, | |
2434 | .compile_policy = xfrm_compile_policy, | |
2435 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2436 | .report = xfrm_send_report, |
5c79de6e | 2437 | .migrate = xfrm_send_migrate, |
1da177e4 LT |
2438 | }; |
2439 | ||
2440 | static int __init xfrm_user_init(void) | |
2441 | { | |
be33690d PM |
2442 | struct sock *nlsk; |
2443 | ||
654b32c6 | 2444 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
1da177e4 | 2445 | |
be33690d | 2446 | nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2447 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2448 | if (nlsk == NULL) |
1da177e4 | 2449 | return -ENOMEM; |
be33690d | 2450 | rcu_assign_pointer(xfrm_nl, nlsk); |
1da177e4 LT |
2451 | |
2452 | xfrm_register_km(&netlink_mgr); | |
2453 | ||
2454 | return 0; | |
2455 | } | |
2456 | ||
2457 | static void __exit xfrm_user_exit(void) | |
2458 | { | |
be33690d PM |
2459 | struct sock *nlsk = xfrm_nl; |
2460 | ||
1da177e4 | 2461 | xfrm_unregister_km(&netlink_mgr); |
be33690d PM |
2462 | rcu_assign_pointer(xfrm_nl, NULL); |
2463 | synchronize_rcu(); | |
2464 | sock_release(nlsk->sk_socket); | |
1da177e4 LT |
2465 | } |
2466 | ||
2467 | module_init(xfrm_user_init); | |
2468 | module_exit(xfrm_user_exit); | |
2469 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2470 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2471 |