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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 | ||
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 LT |
30 | #include <asm/uaccess.h> |
31 | ||
1da177e4 LT |
32 | static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) |
33 | { | |
34 | struct rtattr *rt = xfrma[type - 1]; | |
35 | struct xfrm_algo *algp; | |
31c26852 | 36 | int len; |
1da177e4 LT |
37 | |
38 | if (!rt) | |
39 | return 0; | |
40 | ||
31c26852 HX |
41 | len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); |
42 | if (len < 0) | |
1da177e4 LT |
43 | return -EINVAL; |
44 | ||
45 | algp = RTA_DATA(rt); | |
31c26852 HX |
46 | |
47 | len -= (algp->alg_key_len + 7U) / 8; | |
48 | if (len < 0) | |
49 | return -EINVAL; | |
50 | ||
1da177e4 LT |
51 | switch (type) { |
52 | case XFRMA_ALG_AUTH: | |
53 | if (!algp->alg_key_len && | |
54 | strcmp(algp->alg_name, "digest_null") != 0) | |
55 | return -EINVAL; | |
56 | break; | |
57 | ||
58 | case XFRMA_ALG_CRYPT: | |
59 | if (!algp->alg_key_len && | |
60 | strcmp(algp->alg_name, "cipher_null") != 0) | |
61 | return -EINVAL; | |
62 | break; | |
63 | ||
64 | case XFRMA_ALG_COMP: | |
65 | /* Zero length keys are legal. */ | |
66 | break; | |
67 | ||
68 | default: | |
69 | return -EINVAL; | |
70 | }; | |
71 | ||
72 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static int verify_encap_tmpl(struct rtattr **xfrma) | |
77 | { | |
78 | struct rtattr *rt = xfrma[XFRMA_ENCAP - 1]; | |
79 | struct xfrm_encap_tmpl *encap; | |
80 | ||
81 | if (!rt) | |
82 | return 0; | |
83 | ||
84 | if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap)) | |
85 | return -EINVAL; | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
eb2971b6 MN |
90 | static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type, |
91 | xfrm_address_t **addrp) | |
92 | { | |
93 | struct rtattr *rt = xfrma[type - 1]; | |
94 | ||
95 | if (!rt) | |
96 | return 0; | |
97 | ||
98 | if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp)) | |
99 | return -EINVAL; | |
100 | ||
101 | if (addrp) | |
102 | *addrp = RTA_DATA(rt); | |
103 | ||
104 | return 0; | |
105 | } | |
df71837d TJ |
106 | |
107 | static inline int verify_sec_ctx_len(struct rtattr **xfrma) | |
108 | { | |
109 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1]; | |
110 | struct xfrm_user_sec_ctx *uctx; | |
111 | int len = 0; | |
112 | ||
113 | if (!rt) | |
114 | return 0; | |
115 | ||
116 | if (rt->rta_len < sizeof(*uctx)) | |
117 | return -EINVAL; | |
118 | ||
119 | uctx = RTA_DATA(rt); | |
120 | ||
df71837d TJ |
121 | len += sizeof(struct xfrm_user_sec_ctx); |
122 | len += uctx->ctx_len; | |
123 | ||
124 | if (uctx->len != len) | |
125 | return -EINVAL; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | ||
1da177e4 LT |
131 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
132 | struct rtattr **xfrma) | |
133 | { | |
134 | int err; | |
135 | ||
136 | err = -EINVAL; | |
137 | switch (p->family) { | |
138 | case AF_INET: | |
139 | break; | |
140 | ||
141 | case AF_INET6: | |
142 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
143 | break; | |
144 | #else | |
145 | err = -EAFNOSUPPORT; | |
146 | goto out; | |
147 | #endif | |
148 | ||
149 | default: | |
150 | goto out; | |
151 | }; | |
152 | ||
153 | err = -EINVAL; | |
154 | switch (p->id.proto) { | |
155 | case IPPROTO_AH: | |
156 | if (!xfrma[XFRMA_ALG_AUTH-1] || | |
157 | xfrma[XFRMA_ALG_CRYPT-1] || | |
158 | xfrma[XFRMA_ALG_COMP-1]) | |
159 | goto out; | |
160 | break; | |
161 | ||
162 | case IPPROTO_ESP: | |
163 | if ((!xfrma[XFRMA_ALG_AUTH-1] && | |
164 | !xfrma[XFRMA_ALG_CRYPT-1]) || | |
165 | xfrma[XFRMA_ALG_COMP-1]) | |
166 | goto out; | |
167 | break; | |
168 | ||
169 | case IPPROTO_COMP: | |
170 | if (!xfrma[XFRMA_ALG_COMP-1] || | |
171 | xfrma[XFRMA_ALG_AUTH-1] || | |
172 | xfrma[XFRMA_ALG_CRYPT-1]) | |
173 | goto out; | |
174 | break; | |
175 | ||
176 | default: | |
177 | goto out; | |
178 | }; | |
179 | ||
180 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH))) | |
181 | goto out; | |
182 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT))) | |
183 | goto out; | |
184 | if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP))) | |
185 | goto out; | |
186 | if ((err = verify_encap_tmpl(xfrma))) | |
187 | goto out; | |
df71837d TJ |
188 | if ((err = verify_sec_ctx_len(xfrma))) |
189 | goto out; | |
060f02a3 NT |
190 | if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL))) |
191 | goto out; | |
1da177e4 LT |
192 | |
193 | err = -EINVAL; | |
194 | switch (p->mode) { | |
7e49e6de MN |
195 | case XFRM_MODE_TRANSPORT: |
196 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 197 | case XFRM_MODE_ROUTEOPTIMIZATION: |
1da177e4 LT |
198 | break; |
199 | ||
200 | default: | |
201 | goto out; | |
202 | }; | |
203 | ||
204 | err = 0; | |
205 | ||
206 | out: | |
207 | return err; | |
208 | } | |
209 | ||
210 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
211 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
212 | struct rtattr *u_arg) | |
213 | { | |
214 | struct rtattr *rta = u_arg; | |
215 | struct xfrm_algo *p, *ualg; | |
216 | struct xfrm_algo_desc *algo; | |
b9e9dead | 217 | int len; |
1da177e4 LT |
218 | |
219 | if (!rta) | |
220 | return 0; | |
221 | ||
222 | ualg = RTA_DATA(rta); | |
223 | ||
224 | algo = get_byname(ualg->alg_name, 1); | |
225 | if (!algo) | |
226 | return -ENOSYS; | |
227 | *props = algo->desc.sadb_alg_id; | |
228 | ||
b9e9dead HX |
229 | len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8; |
230 | p = kmalloc(len, GFP_KERNEL); | |
1da177e4 LT |
231 | if (!p) |
232 | return -ENOMEM; | |
233 | ||
b9e9dead | 234 | memcpy(p, ualg, len); |
04ff1260 | 235 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
236 | *algpp = p; |
237 | return 0; | |
238 | } | |
239 | ||
240 | static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg) | |
241 | { | |
242 | struct rtattr *rta = u_arg; | |
243 | struct xfrm_encap_tmpl *p, *uencap; | |
244 | ||
245 | if (!rta) | |
246 | return 0; | |
247 | ||
248 | uencap = RTA_DATA(rta); | |
249 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
250 | if (!p) | |
251 | return -ENOMEM; | |
252 | ||
253 | memcpy(p, uencap, sizeof(*p)); | |
254 | *encapp = p; | |
255 | return 0; | |
256 | } | |
257 | ||
df71837d TJ |
258 | |
259 | static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp) | |
260 | { | |
261 | struct xfrm_sec_ctx *xfrm_ctx = xp->security; | |
262 | int len = 0; | |
263 | ||
264 | if (xfrm_ctx) { | |
265 | len += sizeof(struct xfrm_user_sec_ctx); | |
266 | len += xfrm_ctx->ctx_len; | |
267 | } | |
268 | return len; | |
269 | } | |
270 | ||
271 | static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg) | |
272 | { | |
273 | struct xfrm_user_sec_ctx *uctx; | |
274 | ||
275 | if (!u_arg) | |
276 | return 0; | |
277 | ||
278 | uctx = RTA_DATA(u_arg); | |
279 | return security_xfrm_state_alloc(x, uctx); | |
280 | } | |
281 | ||
060f02a3 NT |
282 | static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg) |
283 | { | |
284 | struct rtattr *rta = u_arg; | |
285 | xfrm_address_t *p, *uaddrp; | |
286 | ||
287 | if (!rta) | |
288 | return 0; | |
289 | ||
290 | uaddrp = RTA_DATA(rta); | |
291 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
292 | if (!p) | |
293 | return -ENOMEM; | |
294 | ||
295 | memcpy(p, uaddrp, sizeof(*p)); | |
296 | *addrpp = p; | |
297 | return 0; | |
298 | } | |
299 | ||
1da177e4 LT |
300 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
301 | { | |
302 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
303 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
304 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
305 | x->props.mode = p->mode; | |
306 | x->props.replay_window = p->replay_window; | |
307 | x->props.reqid = p->reqid; | |
308 | x->props.family = p->family; | |
309 | x->props.saddr = p->saddr; | |
310 | x->props.flags = p->flags; | |
311 | } | |
312 | ||
d51d081d JHS |
313 | /* |
314 | * someday when pfkey also has support, we could have the code | |
315 | * somehow made shareable and move it to xfrm_state.c - JHS | |
316 | * | |
317 | */ | |
318 | static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma) | |
319 | { | |
320 | int err = - EINVAL; | |
321 | struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; | |
322 | struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; | |
323 | struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1]; | |
324 | struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1]; | |
325 | ||
326 | if (rp) { | |
327 | struct xfrm_replay_state *replay; | |
328 | if (RTA_PAYLOAD(rp) < sizeof(*replay)) | |
329 | goto error; | |
330 | replay = RTA_DATA(rp); | |
331 | memcpy(&x->replay, replay, sizeof(*replay)); | |
332 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
333 | } | |
334 | ||
335 | if (lt) { | |
336 | struct xfrm_lifetime_cur *ltime; | |
337 | if (RTA_PAYLOAD(lt) < sizeof(*ltime)) | |
338 | goto error; | |
339 | ltime = RTA_DATA(lt); | |
340 | x->curlft.bytes = ltime->bytes; | |
341 | x->curlft.packets = ltime->packets; | |
342 | x->curlft.add_time = ltime->add_time; | |
343 | x->curlft.use_time = ltime->use_time; | |
344 | } | |
345 | ||
346 | if (et) { | |
347 | if (RTA_PAYLOAD(et) < sizeof(u32)) | |
348 | goto error; | |
349 | x->replay_maxage = *(u32*)RTA_DATA(et); | |
350 | } | |
351 | ||
352 | if (rt) { | |
353 | if (RTA_PAYLOAD(rt) < sizeof(u32)) | |
354 | goto error; | |
355 | x->replay_maxdiff = *(u32*)RTA_DATA(rt); | |
356 | } | |
357 | ||
358 | return 0; | |
359 | error: | |
360 | return err; | |
361 | } | |
362 | ||
1da177e4 LT |
363 | static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, |
364 | struct rtattr **xfrma, | |
365 | int *errp) | |
366 | { | |
367 | struct xfrm_state *x = xfrm_state_alloc(); | |
368 | int err = -ENOMEM; | |
369 | ||
370 | if (!x) | |
371 | goto error_no_put; | |
372 | ||
373 | copy_from_user_state(x, p); | |
374 | ||
375 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, | |
376 | xfrm_aalg_get_byname, | |
377 | xfrma[XFRMA_ALG_AUTH-1]))) | |
378 | goto error; | |
379 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
380 | xfrm_ealg_get_byname, | |
381 | xfrma[XFRMA_ALG_CRYPT-1]))) | |
382 | goto error; | |
383 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
384 | xfrm_calg_get_byname, | |
385 | xfrma[XFRMA_ALG_COMP-1]))) | |
386 | goto error; | |
387 | if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) | |
388 | goto error; | |
060f02a3 NT |
389 | if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1]))) |
390 | goto error; | |
72cb6962 | 391 | err = xfrm_init_state(x); |
1da177e4 LT |
392 | if (err) |
393 | goto error; | |
394 | ||
df71837d TJ |
395 | if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) |
396 | goto error; | |
397 | ||
1da177e4 | 398 | x->km.seq = p->seq; |
d51d081d JHS |
399 | x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; |
400 | /* sysctl_xfrm_aevent_etime is in 100ms units */ | |
401 | x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; | |
402 | x->preplay.bitmap = 0; | |
403 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
404 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
405 | ||
406 | /* override default values from above */ | |
407 | ||
408 | err = xfrm_update_ae_params(x, (struct rtattr **)xfrma); | |
409 | if (err < 0) | |
410 | goto error; | |
1da177e4 LT |
411 | |
412 | return x; | |
413 | ||
414 | error: | |
415 | x->km.state = XFRM_STATE_DEAD; | |
416 | xfrm_state_put(x); | |
417 | error_no_put: | |
418 | *errp = err; | |
419 | return NULL; | |
420 | } | |
421 | ||
422 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
423 | { | |
424 | struct xfrm_usersa_info *p = NLMSG_DATA(nlh); | |
425 | struct xfrm_state *x; | |
426 | int err; | |
26b15dad | 427 | struct km_event c; |
1da177e4 | 428 | |
df71837d | 429 | err = verify_newsa_info(p, (struct rtattr **)xfrma); |
1da177e4 LT |
430 | if (err) |
431 | return err; | |
432 | ||
df71837d | 433 | x = xfrm_state_construct(p, (struct rtattr **)xfrma, &err); |
1da177e4 LT |
434 | if (!x) |
435 | return err; | |
436 | ||
26b15dad | 437 | xfrm_state_hold(x); |
1da177e4 LT |
438 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
439 | err = xfrm_state_add(x); | |
440 | else | |
441 | err = xfrm_state_update(x); | |
442 | ||
443 | if (err < 0) { | |
444 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 445 | __xfrm_state_put(x); |
7d6dfe1f | 446 | goto out; |
1da177e4 LT |
447 | } |
448 | ||
26b15dad JHS |
449 | c.seq = nlh->nlmsg_seq; |
450 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 451 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
452 | |
453 | km_state_notify(x, &c); | |
7d6dfe1f | 454 | out: |
26b15dad | 455 | xfrm_state_put(x); |
1da177e4 LT |
456 | return err; |
457 | } | |
458 | ||
eb2971b6 MN |
459 | static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, |
460 | struct rtattr **xfrma, | |
461 | int *errp) | |
462 | { | |
463 | struct xfrm_state *x = NULL; | |
464 | int err; | |
465 | ||
466 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
467 | err = -ESRCH; | |
468 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
469 | } else { | |
470 | xfrm_address_t *saddr = NULL; | |
471 | ||
472 | err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr); | |
473 | if (err) | |
474 | goto out; | |
475 | ||
476 | if (!saddr) { | |
477 | err = -EINVAL; | |
478 | goto out; | |
479 | } | |
480 | ||
481 | x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, | |
482 | p->family); | |
483 | } | |
484 | ||
485 | out: | |
486 | if (!x && errp) | |
487 | *errp = err; | |
488 | return x; | |
489 | } | |
490 | ||
1da177e4 LT |
491 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) |
492 | { | |
493 | struct xfrm_state *x; | |
eb2971b6 | 494 | int err = -ESRCH; |
26b15dad | 495 | struct km_event c; |
1da177e4 LT |
496 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); |
497 | ||
eb2971b6 | 498 | x = xfrm_user_state_lookup(p, (struct rtattr **)xfrma, &err); |
1da177e4 | 499 | if (x == NULL) |
eb2971b6 | 500 | return err; |
1da177e4 | 501 | |
6f68dc37 | 502 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
503 | goto out; |
504 | ||
1da177e4 | 505 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
506 | err = -EPERM; |
507 | goto out; | |
1da177e4 LT |
508 | } |
509 | ||
26b15dad | 510 | err = xfrm_state_delete(x); |
c8c05a8e CZ |
511 | if (err < 0) |
512 | goto out; | |
26b15dad JHS |
513 | |
514 | c.seq = nlh->nlmsg_seq; | |
515 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 516 | c.event = nlh->nlmsg_type; |
26b15dad | 517 | km_state_notify(x, &c); |
1da177e4 | 518 | |
c8c05a8e CZ |
519 | out: |
520 | xfrm_state_put(x); | |
26b15dad | 521 | return err; |
1da177e4 LT |
522 | } |
523 | ||
524 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
525 | { | |
526 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
527 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
528 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
529 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
530 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
531 | p->saddr = x->props.saddr; | |
532 | p->mode = x->props.mode; | |
533 | p->replay_window = x->props.replay_window; | |
534 | p->reqid = x->props.reqid; | |
535 | p->family = x->props.family; | |
536 | p->flags = x->props.flags; | |
537 | p->seq = x->km.seq; | |
538 | } | |
539 | ||
540 | struct xfrm_dump_info { | |
541 | struct sk_buff *in_skb; | |
542 | struct sk_buff *out_skb; | |
543 | u32 nlmsg_seq; | |
544 | u16 nlmsg_flags; | |
545 | int start_idx; | |
546 | int this_idx; | |
547 | }; | |
548 | ||
549 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
550 | { | |
551 | struct xfrm_dump_info *sp = ptr; | |
552 | struct sk_buff *in_skb = sp->in_skb; | |
553 | struct sk_buff *skb = sp->out_skb; | |
554 | struct xfrm_usersa_info *p; | |
555 | struct nlmsghdr *nlh; | |
556 | unsigned char *b = skb->tail; | |
557 | ||
558 | if (sp->this_idx < sp->start_idx) | |
559 | goto out; | |
560 | ||
561 | nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, | |
562 | sp->nlmsg_seq, | |
563 | XFRM_MSG_NEWSA, sizeof(*p)); | |
564 | nlh->nlmsg_flags = sp->nlmsg_flags; | |
565 | ||
566 | p = NLMSG_DATA(nlh); | |
567 | copy_to_user_state(x, p); | |
568 | ||
569 | if (x->aalg) | |
570 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
571 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
572 | if (x->ealg) | |
573 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
574 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
575 | if (x->calg) | |
576 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
577 | ||
578 | if (x->encap) | |
579 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
580 | ||
df71837d TJ |
581 | if (x->security) { |
582 | int ctx_size = sizeof(struct xfrm_sec_ctx) + | |
583 | x->security->ctx_len; | |
584 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
585 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
586 | ||
587 | uctx->exttype = XFRMA_SEC_CTX; | |
588 | uctx->len = ctx_size; | |
589 | uctx->ctx_doi = x->security->ctx_doi; | |
590 | uctx->ctx_alg = x->security->ctx_alg; | |
591 | uctx->ctx_len = x->security->ctx_len; | |
592 | memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); | |
593 | } | |
060f02a3 NT |
594 | |
595 | if (x->coaddr) | |
596 | RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
597 | ||
9afaca05 MN |
598 | if (x->lastused) |
599 | RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused); | |
600 | ||
1da177e4 LT |
601 | nlh->nlmsg_len = skb->tail - b; |
602 | out: | |
603 | sp->this_idx++; | |
604 | return 0; | |
605 | ||
606 | nlmsg_failure: | |
607 | rtattr_failure: | |
608 | skb_trim(skb, b - skb->data); | |
609 | return -1; | |
610 | } | |
611 | ||
612 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) | |
613 | { | |
614 | struct xfrm_dump_info info; | |
615 | ||
616 | info.in_skb = cb->skb; | |
617 | info.out_skb = skb; | |
618 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
619 | info.nlmsg_flags = NLM_F_MULTI; | |
620 | info.this_idx = 0; | |
621 | info.start_idx = cb->args[0]; | |
dc00a525 | 622 | (void) xfrm_state_walk(0, dump_one_state, &info); |
1da177e4 LT |
623 | cb->args[0] = info.this_idx; |
624 | ||
625 | return skb->len; | |
626 | } | |
627 | ||
628 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
629 | struct xfrm_state *x, u32 seq) | |
630 | { | |
631 | struct xfrm_dump_info info; | |
632 | struct sk_buff *skb; | |
633 | ||
634 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); | |
635 | if (!skb) | |
636 | return ERR_PTR(-ENOMEM); | |
637 | ||
638 | NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; | |
639 | info.in_skb = in_skb; | |
640 | info.out_skb = skb; | |
641 | info.nlmsg_seq = seq; | |
642 | info.nlmsg_flags = 0; | |
643 | info.this_idx = info.start_idx = 0; | |
644 | ||
645 | if (dump_one_state(x, 0, &info)) { | |
646 | kfree_skb(skb); | |
647 | return NULL; | |
648 | } | |
649 | ||
650 | return skb; | |
651 | } | |
652 | ||
653 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
654 | { | |
655 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); | |
656 | struct xfrm_state *x; | |
657 | struct sk_buff *resp_skb; | |
eb2971b6 | 658 | int err = -ESRCH; |
1da177e4 | 659 | |
eb2971b6 | 660 | x = xfrm_user_state_lookup(p, (struct rtattr **)xfrma, &err); |
1da177e4 LT |
661 | if (x == NULL) |
662 | goto out_noput; | |
663 | ||
664 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
665 | if (IS_ERR(resp_skb)) { | |
666 | err = PTR_ERR(resp_skb); | |
667 | } else { | |
668 | err = netlink_unicast(xfrm_nl, resp_skb, | |
669 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
670 | } | |
671 | xfrm_state_put(x); | |
672 | out_noput: | |
673 | return err; | |
674 | } | |
675 | ||
676 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
677 | { | |
678 | switch (p->info.id.proto) { | |
679 | case IPPROTO_AH: | |
680 | case IPPROTO_ESP: | |
681 | break; | |
682 | ||
683 | case IPPROTO_COMP: | |
684 | /* IPCOMP spi is 16-bits. */ | |
685 | if (p->max >= 0x10000) | |
686 | return -EINVAL; | |
687 | break; | |
688 | ||
689 | default: | |
690 | return -EINVAL; | |
691 | }; | |
692 | ||
693 | if (p->min > p->max) | |
694 | return -EINVAL; | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
700 | { | |
701 | struct xfrm_state *x; | |
702 | struct xfrm_userspi_info *p; | |
703 | struct sk_buff *resp_skb; | |
704 | xfrm_address_t *daddr; | |
705 | int family; | |
706 | int err; | |
707 | ||
708 | p = NLMSG_DATA(nlh); | |
709 | err = verify_userspi_info(p); | |
710 | if (err) | |
711 | goto out_noput; | |
712 | ||
713 | family = p->info.family; | |
714 | daddr = &p->info.id.daddr; | |
715 | ||
716 | x = NULL; | |
717 | if (p->info.seq) { | |
718 | x = xfrm_find_acq_byseq(p->info.seq); | |
719 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
720 | xfrm_state_put(x); | |
721 | x = NULL; | |
722 | } | |
723 | } | |
724 | ||
725 | if (!x) | |
726 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
727 | p->info.id.proto, daddr, | |
728 | &p->info.saddr, 1, | |
729 | family); | |
730 | err = -ENOENT; | |
731 | if (x == NULL) | |
732 | goto out_noput; | |
733 | ||
734 | resp_skb = ERR_PTR(-ENOENT); | |
735 | ||
736 | spin_lock_bh(&x->lock); | |
737 | if (x->km.state != XFRM_STATE_DEAD) { | |
738 | xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); | |
739 | if (x->id.spi) | |
740 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
741 | } | |
742 | spin_unlock_bh(&x->lock); | |
743 | ||
744 | if (IS_ERR(resp_skb)) { | |
745 | err = PTR_ERR(resp_skb); | |
746 | goto out; | |
747 | } | |
748 | ||
749 | err = netlink_unicast(xfrm_nl, resp_skb, | |
750 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
751 | ||
752 | out: | |
753 | xfrm_state_put(x); | |
754 | out_noput: | |
755 | return err; | |
756 | } | |
757 | ||
758 | static int verify_policy_dir(__u8 dir) | |
759 | { | |
760 | switch (dir) { | |
761 | case XFRM_POLICY_IN: | |
762 | case XFRM_POLICY_OUT: | |
763 | case XFRM_POLICY_FWD: | |
764 | break; | |
765 | ||
766 | default: | |
767 | return -EINVAL; | |
768 | }; | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
773 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) | |
774 | { | |
775 | switch (p->share) { | |
776 | case XFRM_SHARE_ANY: | |
777 | case XFRM_SHARE_SESSION: | |
778 | case XFRM_SHARE_USER: | |
779 | case XFRM_SHARE_UNIQUE: | |
780 | break; | |
781 | ||
782 | default: | |
783 | return -EINVAL; | |
784 | }; | |
785 | ||
786 | switch (p->action) { | |
787 | case XFRM_POLICY_ALLOW: | |
788 | case XFRM_POLICY_BLOCK: | |
789 | break; | |
790 | ||
791 | default: | |
792 | return -EINVAL; | |
793 | }; | |
794 | ||
795 | switch (p->sel.family) { | |
796 | case AF_INET: | |
797 | break; | |
798 | ||
799 | case AF_INET6: | |
800 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
801 | break; | |
802 | #else | |
803 | return -EAFNOSUPPORT; | |
804 | #endif | |
805 | ||
806 | default: | |
807 | return -EINVAL; | |
808 | }; | |
809 | ||
810 | return verify_policy_dir(p->dir); | |
811 | } | |
812 | ||
df71837d TJ |
813 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) |
814 | { | |
815 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; | |
816 | struct xfrm_user_sec_ctx *uctx; | |
817 | ||
818 | if (!rt) | |
819 | return 0; | |
820 | ||
821 | uctx = RTA_DATA(rt); | |
822 | return security_xfrm_policy_alloc(pol, uctx); | |
823 | } | |
824 | ||
1da177e4 LT |
825 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
826 | int nr) | |
827 | { | |
828 | int i; | |
829 | ||
830 | xp->xfrm_nr = nr; | |
831 | for (i = 0; i < nr; i++, ut++) { | |
832 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
833 | ||
834 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
835 | memcpy(&t->saddr, &ut->saddr, | |
836 | sizeof(xfrm_address_t)); | |
837 | t->reqid = ut->reqid; | |
838 | t->mode = ut->mode; | |
839 | t->share = ut->share; | |
840 | t->optional = ut->optional; | |
841 | t->aalgos = ut->aalgos; | |
842 | t->ealgos = ut->ealgos; | |
843 | t->calgos = ut->calgos; | |
844 | } | |
845 | } | |
846 | ||
847 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) | |
848 | { | |
849 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
850 | struct xfrm_user_tmpl *utmpl; | |
851 | int nr; | |
852 | ||
853 | if (!rt) { | |
854 | pol->xfrm_nr = 0; | |
855 | } else { | |
856 | nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); | |
857 | ||
858 | if (nr > XFRM_MAX_DEPTH) | |
859 | return -EINVAL; | |
860 | ||
861 | copy_templates(pol, RTA_DATA(rt), nr); | |
862 | } | |
863 | return 0; | |
864 | } | |
865 | ||
866 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) | |
867 | { | |
868 | xp->priority = p->priority; | |
869 | xp->index = p->index; | |
870 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
871 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
872 | xp->action = p->action; | |
873 | xp->flags = p->flags; | |
874 | xp->family = p->sel.family; | |
875 | /* XXX xp->share = p->share; */ | |
876 | } | |
877 | ||
878 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
879 | { | |
880 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
881 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
882 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
883 | p->priority = xp->priority; | |
884 | p->index = xp->index; | |
885 | p->sel.family = xp->family; | |
886 | p->dir = dir; | |
887 | p->action = xp->action; | |
888 | p->flags = xp->flags; | |
889 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
890 | } | |
891 | ||
892 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) | |
893 | { | |
894 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
895 | int err; | |
896 | ||
897 | if (!xp) { | |
898 | *errp = -ENOMEM; | |
899 | return NULL; | |
900 | } | |
901 | ||
902 | copy_from_user_policy(xp, p); | |
df71837d TJ |
903 | |
904 | if (!(err = copy_from_user_tmpl(xp, xfrma))) | |
905 | err = copy_from_user_sec_ctx(xp, xfrma); | |
906 | ||
1da177e4 LT |
907 | if (err) { |
908 | *errp = err; | |
909 | kfree(xp); | |
910 | xp = NULL; | |
911 | } | |
912 | ||
913 | return xp; | |
914 | } | |
915 | ||
916 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
917 | { | |
918 | struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); | |
919 | struct xfrm_policy *xp; | |
26b15dad | 920 | struct km_event c; |
1da177e4 LT |
921 | int err; |
922 | int excl; | |
923 | ||
924 | err = verify_newpolicy_info(p); | |
df71837d TJ |
925 | if (err) |
926 | return err; | |
927 | err = verify_sec_ctx_len((struct rtattr **)xfrma); | |
1da177e4 LT |
928 | if (err) |
929 | return err; | |
930 | ||
df71837d | 931 | xp = xfrm_policy_construct(p, (struct rtattr **)xfrma, &err); |
1da177e4 LT |
932 | if (!xp) |
933 | return err; | |
934 | ||
26b15dad JHS |
935 | /* shouldnt excl be based on nlh flags?? |
936 | * Aha! this is anti-netlink really i.e more pfkey derived | |
937 | * in netlink excl is a flag and you wouldnt need | |
938 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
939 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
940 | err = xfrm_policy_insert(p->dir, xp, excl); | |
941 | if (err) { | |
5f8ac64b | 942 | security_xfrm_policy_free(xp); |
1da177e4 LT |
943 | kfree(xp); |
944 | return err; | |
945 | } | |
946 | ||
f60f6b8f | 947 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
948 | c.seq = nlh->nlmsg_seq; |
949 | c.pid = nlh->nlmsg_pid; | |
950 | km_policy_notify(xp, p->dir, &c); | |
951 | ||
1da177e4 LT |
952 | xfrm_pol_put(xp); |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
957 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
958 | { | |
959 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
960 | int i; | |
961 | ||
962 | if (xp->xfrm_nr == 0) | |
963 | return 0; | |
964 | ||
965 | for (i = 0; i < xp->xfrm_nr; i++) { | |
966 | struct xfrm_user_tmpl *up = &vec[i]; | |
967 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
968 | ||
969 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
970 | up->family = xp->family; | |
971 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); | |
972 | up->reqid = kp->reqid; | |
973 | up->mode = kp->mode; | |
974 | up->share = kp->share; | |
975 | up->optional = kp->optional; | |
976 | up->aalgos = kp->aalgos; | |
977 | up->ealgos = kp->ealgos; | |
978 | up->calgos = kp->calgos; | |
979 | } | |
980 | RTA_PUT(skb, XFRMA_TMPL, | |
981 | (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), | |
982 | vec); | |
983 | ||
984 | return 0; | |
985 | ||
986 | rtattr_failure: | |
987 | return -1; | |
988 | } | |
989 | ||
0d681623 | 990 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
df71837d | 991 | { |
0d681623 SH |
992 | int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len; |
993 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
994 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
995 | ||
996 | uctx->exttype = XFRMA_SEC_CTX; | |
997 | uctx->len = ctx_size; | |
998 | uctx->ctx_doi = s->ctx_doi; | |
999 | uctx->ctx_alg = s->ctx_alg; | |
1000 | uctx->ctx_len = s->ctx_len; | |
1001 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
1002 | return 0; | |
df71837d | 1003 | |
0d681623 SH |
1004 | rtattr_failure: |
1005 | return -1; | |
1006 | } | |
1007 | ||
1008 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1009 | { | |
1010 | if (x->security) { | |
1011 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1012 | } |
1013 | return 0; | |
0d681623 | 1014 | } |
df71837d | 1015 | |
0d681623 SH |
1016 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1017 | { | |
1018 | if (xp->security) { | |
1019 | return copy_sec_ctx(xp->security, skb); | |
1020 | } | |
1021 | return 0; | |
df71837d TJ |
1022 | } |
1023 | ||
1da177e4 LT |
1024 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1025 | { | |
1026 | struct xfrm_dump_info *sp = ptr; | |
1027 | struct xfrm_userpolicy_info *p; | |
1028 | struct sk_buff *in_skb = sp->in_skb; | |
1029 | struct sk_buff *skb = sp->out_skb; | |
1030 | struct nlmsghdr *nlh; | |
1031 | unsigned char *b = skb->tail; | |
1032 | ||
1033 | if (sp->this_idx < sp->start_idx) | |
1034 | goto out; | |
1035 | ||
1036 | nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, | |
1037 | sp->nlmsg_seq, | |
1038 | XFRM_MSG_NEWPOLICY, sizeof(*p)); | |
1039 | p = NLMSG_DATA(nlh); | |
1040 | nlh->nlmsg_flags = sp->nlmsg_flags; | |
1041 | ||
1042 | copy_to_user_policy(xp, p, dir); | |
1043 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1044 | goto nlmsg_failure; | |
df71837d TJ |
1045 | if (copy_to_user_sec_ctx(xp, skb)) |
1046 | goto nlmsg_failure; | |
1da177e4 LT |
1047 | |
1048 | nlh->nlmsg_len = skb->tail - b; | |
1049 | out: | |
1050 | sp->this_idx++; | |
1051 | return 0; | |
1052 | ||
1053 | nlmsg_failure: | |
1054 | skb_trim(skb, b - skb->data); | |
1055 | return -1; | |
1056 | } | |
1057 | ||
1058 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
1059 | { | |
1060 | struct xfrm_dump_info info; | |
1061 | ||
1062 | info.in_skb = cb->skb; | |
1063 | info.out_skb = skb; | |
1064 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1065 | info.nlmsg_flags = NLM_F_MULTI; | |
1066 | info.this_idx = 0; | |
1067 | info.start_idx = cb->args[0]; | |
1068 | (void) xfrm_policy_walk(dump_one_policy, &info); | |
1069 | cb->args[0] = info.this_idx; | |
1070 | ||
1071 | return skb->len; | |
1072 | } | |
1073 | ||
1074 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1075 | struct xfrm_policy *xp, | |
1076 | int dir, u32 seq) | |
1077 | { | |
1078 | struct xfrm_dump_info info; | |
1079 | struct sk_buff *skb; | |
1080 | ||
1081 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1082 | if (!skb) | |
1083 | return ERR_PTR(-ENOMEM); | |
1084 | ||
1085 | NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; | |
1086 | info.in_skb = in_skb; | |
1087 | info.out_skb = skb; | |
1088 | info.nlmsg_seq = seq; | |
1089 | info.nlmsg_flags = 0; | |
1090 | info.this_idx = info.start_idx = 0; | |
1091 | ||
1092 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1093 | kfree_skb(skb); | |
1094 | return NULL; | |
1095 | } | |
1096 | ||
1097 | return skb; | |
1098 | } | |
1099 | ||
1100 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
1101 | { | |
1102 | struct xfrm_policy *xp; | |
1103 | struct xfrm_userpolicy_id *p; | |
1104 | int err; | |
26b15dad | 1105 | struct km_event c; |
1da177e4 LT |
1106 | int delete; |
1107 | ||
1108 | p = NLMSG_DATA(nlh); | |
1109 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; | |
1110 | ||
1111 | err = verify_policy_dir(p->dir); | |
1112 | if (err) | |
1113 | return err; | |
1114 | ||
1115 | if (p->index) | |
1116 | xp = xfrm_policy_byid(p->dir, p->index, delete); | |
df71837d TJ |
1117 | else { |
1118 | struct rtattr **rtattrs = (struct rtattr **)xfrma; | |
1119 | struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; | |
1120 | struct xfrm_policy tmp; | |
1121 | ||
1122 | err = verify_sec_ctx_len(rtattrs); | |
1123 | if (err) | |
1124 | return err; | |
1125 | ||
1126 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1127 | if (rt) { | |
1128 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1129 | ||
1130 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1131 | return err; | |
1132 | } | |
1133 | xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, delete); | |
1134 | security_xfrm_policy_free(&tmp); | |
1135 | } | |
1da177e4 LT |
1136 | if (xp == NULL) |
1137 | return -ENOENT; | |
1138 | ||
1139 | if (!delete) { | |
1140 | struct sk_buff *resp_skb; | |
1141 | ||
1142 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1143 | if (IS_ERR(resp_skb)) { | |
1144 | err = PTR_ERR(resp_skb); | |
1145 | } else { | |
1146 | err = netlink_unicast(xfrm_nl, resp_skb, | |
1147 | NETLINK_CB(skb).pid, | |
1148 | MSG_DONTWAIT); | |
1149 | } | |
26b15dad | 1150 | } else { |
6f68dc37 | 1151 | if ((err = security_xfrm_policy_delete(xp)) != 0) |
c8c05a8e | 1152 | goto out; |
e7443892 | 1153 | c.data.byid = p->index; |
f60f6b8f | 1154 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1155 | c.seq = nlh->nlmsg_seq; |
1156 | c.pid = nlh->nlmsg_pid; | |
1157 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | xfrm_pol_put(xp); | |
1161 | ||
c8c05a8e | 1162 | out: |
1da177e4 LT |
1163 | return err; |
1164 | } | |
1165 | ||
1166 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
1167 | { | |
26b15dad | 1168 | struct km_event c; |
1da177e4 LT |
1169 | struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); |
1170 | ||
1171 | xfrm_state_flush(p->proto); | |
bf08867f | 1172 | c.data.proto = p->proto; |
f60f6b8f | 1173 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1174 | c.seq = nlh->nlmsg_seq; |
1175 | c.pid = nlh->nlmsg_pid; | |
1176 | km_state_notify(NULL, &c); | |
1177 | ||
1da177e4 LT |
1178 | return 0; |
1179 | } | |
1180 | ||
d51d081d JHS |
1181 | |
1182 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1183 | { | |
1184 | struct xfrm_aevent_id *id; | |
1185 | struct nlmsghdr *nlh; | |
1186 | struct xfrm_lifetime_cur ltime; | |
1187 | unsigned char *b = skb->tail; | |
1188 | ||
1189 | nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id)); | |
1190 | id = NLMSG_DATA(nlh); | |
1191 | nlh->nlmsg_flags = 0; | |
1192 | ||
1193 | id->sa_id.daddr = x->id.daddr; | |
1194 | id->sa_id.spi = x->id.spi; | |
1195 | id->sa_id.family = x->props.family; | |
1196 | id->sa_id.proto = x->id.proto; | |
1197 | id->flags = c->data.aevent; | |
1198 | ||
1199 | RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); | |
1200 | ||
1201 | ltime.bytes = x->curlft.bytes; | |
1202 | ltime.packets = x->curlft.packets; | |
1203 | ltime.add_time = x->curlft.add_time; | |
1204 | ltime.use_time = x->curlft.use_time; | |
1205 | ||
1206 | RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); | |
1207 | ||
1208 | if (id->flags&XFRM_AE_RTHR) { | |
1209 | RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); | |
1210 | } | |
1211 | ||
1212 | if (id->flags&XFRM_AE_ETHR) { | |
1213 | u32 etimer = x->replay_maxage*10/HZ; | |
1214 | RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); | |
1215 | } | |
1216 | ||
1217 | nlh->nlmsg_len = skb->tail - b; | |
1218 | return skb->len; | |
1219 | ||
1220 | rtattr_failure: | |
1221 | nlmsg_failure: | |
1222 | skb_trim(skb, b - skb->data); | |
1223 | return -1; | |
1224 | } | |
1225 | ||
1226 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
1227 | { | |
1228 | struct xfrm_state *x; | |
1229 | struct sk_buff *r_skb; | |
1230 | int err; | |
1231 | struct km_event c; | |
1232 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1233 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
1234 | struct xfrm_usersa_id *id = &p->sa_id; | |
1235 | ||
1236 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
1237 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
1238 | ||
1239 | if (p->flags&XFRM_AE_RTHR) | |
1240 | len+=RTA_SPACE(sizeof(u32)); | |
1241 | ||
1242 | if (p->flags&XFRM_AE_ETHR) | |
1243 | len+=RTA_SPACE(sizeof(u32)); | |
1244 | ||
1245 | r_skb = alloc_skb(len, GFP_ATOMIC); | |
1246 | if (r_skb == NULL) | |
1247 | return -ENOMEM; | |
1248 | ||
1249 | x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); | |
1250 | if (x == NULL) { | |
1251 | kfree(r_skb); | |
1252 | return -ESRCH; | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * XXX: is this lock really needed - none of the other | |
1257 | * gets lock (the concern is things getting updated | |
1258 | * while we are still reading) - jhs | |
1259 | */ | |
1260 | spin_lock_bh(&x->lock); | |
1261 | c.data.aevent = p->flags; | |
1262 | c.seq = nlh->nlmsg_seq; | |
1263 | c.pid = nlh->nlmsg_pid; | |
1264 | ||
1265 | if (build_aevent(r_skb, x, &c) < 0) | |
1266 | BUG(); | |
1267 | err = netlink_unicast(xfrm_nl, r_skb, | |
1268 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1269 | spin_unlock_bh(&x->lock); | |
1270 | xfrm_state_put(x); | |
1271 | return err; | |
1272 | } | |
1273 | ||
1274 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) | |
1275 | { | |
1276 | struct xfrm_state *x; | |
1277 | struct km_event c; | |
1278 | int err = - EINVAL; | |
1279 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1280 | struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; | |
1281 | struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; | |
1282 | ||
1283 | if (!lt && !rp) | |
1284 | return err; | |
1285 | ||
1286 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1287 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1288 | return err; | |
1289 | ||
1290 | x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
1291 | if (x == NULL) | |
1292 | return -ESRCH; | |
1293 | ||
1294 | if (x->km.state != XFRM_STATE_VALID) | |
1295 | goto out; | |
1296 | ||
1297 | spin_lock_bh(&x->lock); | |
1298 | err = xfrm_update_ae_params(x,(struct rtattr **)xfrma); | |
1299 | spin_unlock_bh(&x->lock); | |
1300 | if (err < 0) | |
1301 | goto out; | |
1302 | ||
1303 | c.event = nlh->nlmsg_type; | |
1304 | c.seq = nlh->nlmsg_seq; | |
1305 | c.pid = nlh->nlmsg_pid; | |
1306 | c.data.aevent = XFRM_AE_CU; | |
1307 | km_state_notify(x, &c); | |
1308 | err = 0; | |
1309 | out: | |
1310 | xfrm_state_put(x); | |
1311 | return err; | |
1312 | } | |
1313 | ||
1da177e4 LT |
1314 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) |
1315 | { | |
6c5c8ca7 | 1316 | struct km_event c; |
26b15dad | 1317 | |
1da177e4 | 1318 | xfrm_policy_flush(); |
f60f6b8f | 1319 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1320 | c.seq = nlh->nlmsg_seq; |
1321 | c.pid = nlh->nlmsg_pid; | |
1322 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1323 | return 0; |
1324 | } | |
1325 | ||
6c5c8ca7 JHS |
1326 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) |
1327 | { | |
1328 | struct xfrm_policy *xp; | |
1329 | struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); | |
1330 | struct xfrm_userpolicy_info *p = &up->pol; | |
1331 | int err = -ENOENT; | |
1332 | ||
1333 | if (p->index) | |
1334 | xp = xfrm_policy_byid(p->dir, p->index, 0); | |
1335 | else { | |
1336 | struct rtattr **rtattrs = (struct rtattr **)xfrma; | |
1337 | struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; | |
1338 | struct xfrm_policy tmp; | |
1339 | ||
1340 | err = verify_sec_ctx_len(rtattrs); | |
1341 | if (err) | |
1342 | return err; | |
1343 | ||
1344 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1345 | if (rt) { | |
1346 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1347 | ||
1348 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1349 | return err; | |
1350 | } | |
1351 | xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, 0); | |
1352 | security_xfrm_policy_free(&tmp); | |
1353 | } | |
1354 | ||
1355 | if (xp == NULL) | |
1356 | return err; | |
1357 | read_lock(&xp->lock); | |
1358 | if (xp->dead) { | |
1359 | read_unlock(&xp->lock); | |
1360 | goto out; | |
1361 | } | |
1362 | ||
1363 | read_unlock(&xp->lock); | |
1364 | err = 0; | |
1365 | if (up->hard) { | |
1366 | xfrm_policy_delete(xp, p->dir); | |
1367 | } else { | |
1368 | // reset the timers here? | |
1369 | printk("Dont know what to do with soft policy expire\n"); | |
1370 | } | |
1371 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1372 | ||
1373 | out: | |
1374 | xfrm_pol_put(xp); | |
1375 | return err; | |
1376 | } | |
1377 | ||
53bc6b4d JHS |
1378 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) |
1379 | { | |
1380 | struct xfrm_state *x; | |
1381 | int err; | |
1382 | struct xfrm_user_expire *ue = NLMSG_DATA(nlh); | |
1383 | struct xfrm_usersa_info *p = &ue->state; | |
1384 | ||
1385 | x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); | |
1386 | err = -ENOENT; | |
1387 | ||
1388 | if (x == NULL) | |
1389 | return err; | |
1390 | ||
1391 | err = -EINVAL; | |
1392 | ||
1393 | spin_lock_bh(&x->lock); | |
1394 | if (x->km.state != XFRM_STATE_VALID) | |
1395 | goto out; | |
1396 | km_state_expired(x, ue->hard, current->pid); | |
1397 | ||
1398 | if (ue->hard) | |
1399 | __xfrm_state_delete(x); | |
1400 | out: | |
1401 | spin_unlock_bh(&x->lock); | |
1402 | xfrm_state_put(x); | |
1403 | return err; | |
1404 | } | |
1405 | ||
980ebd25 JHS |
1406 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) |
1407 | { | |
1408 | struct xfrm_policy *xp; | |
1409 | struct xfrm_user_tmpl *ut; | |
1410 | int i; | |
1411 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
1412 | ||
1413 | struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); | |
1414 | struct xfrm_state *x = xfrm_state_alloc(); | |
1415 | int err = -ENOMEM; | |
1416 | ||
1417 | if (!x) | |
1418 | return err; | |
1419 | ||
1420 | err = verify_newpolicy_info(&ua->policy); | |
1421 | if (err) { | |
1422 | printk("BAD policy passed\n"); | |
1423 | kfree(x); | |
1424 | return err; | |
1425 | } | |
1426 | ||
1427 | /* build an XP */ | |
1428 | xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); if (!xp) { | |
1429 | kfree(x); | |
1430 | return err; | |
1431 | } | |
1432 | ||
1433 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1434 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1435 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1436 | ||
1437 | ut = RTA_DATA(rt); | |
1438 | /* extract the templates and for each call km_key */ | |
1439 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1440 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1441 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1442 | x->props.mode = t->mode; | |
1443 | x->props.reqid = t->reqid; | |
1444 | x->props.family = ut->family; | |
1445 | t->aalgos = ua->aalgos; | |
1446 | t->ealgos = ua->ealgos; | |
1447 | t->calgos = ua->calgos; | |
1448 | err = km_query(x, t, xp); | |
1449 | ||
1450 | } | |
1451 | ||
1452 | kfree(x); | |
1453 | kfree(xp); | |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
d51d081d | 1458 | |
492b558b TG |
1459 | #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) |
1460 | ||
1461 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1462 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1463 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1464 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1465 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1466 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1467 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1468 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1469 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1470 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b TG |
1471 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
1472 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
6c5c8ca7 | 1473 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b TG |
1474 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
1475 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), | |
d51d081d JHS |
1476 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1477 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
1da177e4 LT |
1478 | }; |
1479 | ||
492b558b TG |
1480 | #undef XMSGSIZE |
1481 | ||
1da177e4 LT |
1482 | static struct xfrm_link { |
1483 | int (*doit)(struct sk_buff *, struct nlmsghdr *, void **); | |
1484 | int (*dump)(struct sk_buff *, struct netlink_callback *); | |
492b558b TG |
1485 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1486 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1487 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1488 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1489 | .dump = xfrm_dump_sa }, | |
1490 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1491 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1492 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1493 | .dump = xfrm_dump_policy }, | |
1494 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
980ebd25 | 1495 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1496 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1497 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1498 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1499 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1500 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1501 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1502 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1503 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
1da177e4 LT |
1504 | }; |
1505 | ||
1da177e4 LT |
1506 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) |
1507 | { | |
1508 | struct rtattr *xfrma[XFRMA_MAX]; | |
1509 | struct xfrm_link *link; | |
1510 | int type, min_len; | |
1511 | ||
1512 | if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) | |
1513 | return 0; | |
1514 | ||
1515 | type = nlh->nlmsg_type; | |
1516 | ||
1517 | /* A control message: ignore them */ | |
1518 | if (type < XFRM_MSG_BASE) | |
1519 | return 0; | |
1520 | ||
1521 | /* Unknown message: reply with EINVAL */ | |
1522 | if (type > XFRM_MSG_MAX) | |
1523 | goto err_einval; | |
1524 | ||
1525 | type -= XFRM_MSG_BASE; | |
1526 | link = &xfrm_dispatch[type]; | |
1527 | ||
1528 | /* All operations require privileges, even GET */ | |
c7bdb545 | 1529 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) { |
1da177e4 LT |
1530 | *errp = -EPERM; |
1531 | return -1; | |
1532 | } | |
1533 | ||
492b558b TG |
1534 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1535 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1536 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 LT |
1537 | if (link->dump == NULL) |
1538 | goto err_einval; | |
1539 | ||
1540 | if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh, | |
a8f74b22 | 1541 | link->dump, NULL)) != 0) { |
1da177e4 LT |
1542 | return -1; |
1543 | } | |
88fc2c84 TG |
1544 | |
1545 | netlink_queue_skip(nlh, skb); | |
1da177e4 LT |
1546 | return -1; |
1547 | } | |
1548 | ||
1549 | memset(xfrma, 0, sizeof(xfrma)); | |
1550 | ||
1551 | if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) | |
1552 | goto err_einval; | |
1553 | ||
1554 | if (nlh->nlmsg_len > min_len) { | |
1555 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
1556 | struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); | |
1557 | ||
1558 | while (RTA_OK(attr, attrlen)) { | |
1559 | unsigned short flavor = attr->rta_type; | |
1560 | if (flavor) { | |
1561 | if (flavor > XFRMA_MAX) | |
1562 | goto err_einval; | |
1563 | xfrma[flavor - 1] = attr; | |
1564 | } | |
1565 | attr = RTA_NEXT(attr, attrlen); | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | if (link->doit == NULL) | |
1570 | goto err_einval; | |
1571 | *errp = link->doit(skb, nlh, (void **) &xfrma); | |
1572 | ||
1573 | return *errp; | |
1574 | ||
1575 | err_einval: | |
1576 | *errp = -EINVAL; | |
1577 | return -1; | |
1578 | } | |
1579 | ||
1da177e4 LT |
1580 | static void xfrm_netlink_rcv(struct sock *sk, int len) |
1581 | { | |
88fc2c84 | 1582 | unsigned int qlen = 0; |
2a0a6ebe | 1583 | |
1da177e4 | 1584 | do { |
4a3e2f71 | 1585 | mutex_lock(&xfrm_cfg_mutex); |
88fc2c84 | 1586 | netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); |
4a3e2f71 | 1587 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 | 1588 | |
2a0a6ebe | 1589 | } while (qlen); |
1da177e4 LT |
1590 | } |
1591 | ||
d51d081d | 1592 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1593 | { |
1594 | struct xfrm_user_expire *ue; | |
1595 | struct nlmsghdr *nlh; | |
1596 | unsigned char *b = skb->tail; | |
1597 | ||
d51d081d | 1598 | nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE, |
1da177e4 LT |
1599 | sizeof(*ue)); |
1600 | ue = NLMSG_DATA(nlh); | |
1601 | nlh->nlmsg_flags = 0; | |
1602 | ||
1603 | copy_to_user_state(x, &ue->state); | |
d51d081d | 1604 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 LT |
1605 | |
1606 | nlh->nlmsg_len = skb->tail - b; | |
1607 | return skb->len; | |
1608 | ||
1609 | nlmsg_failure: | |
1610 | skb_trim(skb, b - skb->data); | |
1611 | return -1; | |
1612 | } | |
1613 | ||
26b15dad | 1614 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1615 | { |
1616 | struct sk_buff *skb; | |
ee57eef9 | 1617 | int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); |
1da177e4 | 1618 | |
ee57eef9 | 1619 | skb = alloc_skb(len, GFP_ATOMIC); |
1da177e4 LT |
1620 | if (skb == NULL) |
1621 | return -ENOMEM; | |
1622 | ||
d51d081d | 1623 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
1624 | BUG(); |
1625 | ||
ac6d439d PM |
1626 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
1627 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
1628 | } |
1629 | ||
d51d081d JHS |
1630 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
1631 | { | |
1632 | struct sk_buff *skb; | |
1633 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
1634 | ||
1635 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
1636 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
1637 | skb = alloc_skb(len, GFP_ATOMIC); | |
1638 | if (skb == NULL) | |
1639 | return -ENOMEM; | |
1640 | ||
1641 | if (build_aevent(skb, x, c) < 0) | |
1642 | BUG(); | |
1643 | ||
1644 | NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; | |
1645 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); | |
1646 | } | |
1647 | ||
26b15dad JHS |
1648 | static int xfrm_notify_sa_flush(struct km_event *c) |
1649 | { | |
1650 | struct xfrm_usersa_flush *p; | |
1651 | struct nlmsghdr *nlh; | |
1652 | struct sk_buff *skb; | |
1653 | unsigned char *b; | |
1654 | int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); | |
1655 | ||
1656 | skb = alloc_skb(len, GFP_ATOMIC); | |
1657 | if (skb == NULL) | |
1658 | return -ENOMEM; | |
1659 | b = skb->tail; | |
1660 | ||
1661 | nlh = NLMSG_PUT(skb, c->pid, c->seq, | |
1662 | XFRM_MSG_FLUSHSA, sizeof(*p)); | |
1663 | nlh->nlmsg_flags = 0; | |
1664 | ||
1665 | p = NLMSG_DATA(nlh); | |
bf08867f | 1666 | p->proto = c->data.proto; |
26b15dad JHS |
1667 | |
1668 | nlh->nlmsg_len = skb->tail - b; | |
1669 | ||
ac6d439d PM |
1670 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
1671 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
1672 | |
1673 | nlmsg_failure: | |
1674 | kfree_skb(skb); | |
1675 | return -1; | |
1676 | } | |
1677 | ||
1678 | static int inline xfrm_sa_len(struct xfrm_state *x) | |
1679 | { | |
0603eac0 | 1680 | int l = 0; |
26b15dad JHS |
1681 | if (x->aalg) |
1682 | l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); | |
1683 | if (x->ealg) | |
1684 | l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); | |
1685 | if (x->calg) | |
1686 | l += RTA_SPACE(sizeof(*x->calg)); | |
1687 | if (x->encap) | |
1688 | l += RTA_SPACE(sizeof(*x->encap)); | |
1689 | ||
1690 | return l; | |
1691 | } | |
1692 | ||
1693 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
1694 | { | |
1695 | struct xfrm_usersa_info *p; | |
0603eac0 | 1696 | struct xfrm_usersa_id *id; |
26b15dad JHS |
1697 | struct nlmsghdr *nlh; |
1698 | struct sk_buff *skb; | |
26b15dad JHS |
1699 | unsigned char *b; |
1700 | int len = xfrm_sa_len(x); | |
0603eac0 HX |
1701 | int headlen; |
1702 | ||
1703 | headlen = sizeof(*p); | |
1704 | if (c->event == XFRM_MSG_DELSA) { | |
1705 | len += RTA_SPACE(headlen); | |
1706 | headlen = sizeof(*id); | |
1707 | } | |
1708 | len += NLMSG_SPACE(headlen); | |
26b15dad JHS |
1709 | |
1710 | skb = alloc_skb(len, GFP_ATOMIC); | |
1711 | if (skb == NULL) | |
1712 | return -ENOMEM; | |
1713 | b = skb->tail; | |
1714 | ||
0603eac0 | 1715 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
1716 | nlh->nlmsg_flags = 0; |
1717 | ||
1718 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
1719 | if (c->event == XFRM_MSG_DELSA) { |
1720 | id = NLMSG_DATA(nlh); | |
1721 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); | |
1722 | id->spi = x->id.spi; | |
1723 | id->family = x->props.family; | |
1724 | id->proto = x->id.proto; | |
1725 | ||
1726 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); | |
1727 | } | |
1728 | ||
26b15dad JHS |
1729 | copy_to_user_state(x, p); |
1730 | ||
1731 | if (x->aalg) | |
1732 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
1733 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
1734 | if (x->ealg) | |
1735 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
1736 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
1737 | if (x->calg) | |
1738 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
1739 | ||
1740 | if (x->encap) | |
1741 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
1742 | ||
1743 | nlh->nlmsg_len = skb->tail - b; | |
1744 | ||
ac6d439d PM |
1745 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
1746 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
1747 | |
1748 | nlmsg_failure: | |
1749 | rtattr_failure: | |
1750 | kfree_skb(skb); | |
1751 | return -1; | |
1752 | } | |
1753 | ||
1754 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
1755 | { | |
1756 | ||
1757 | switch (c->event) { | |
f60f6b8f | 1758 | case XFRM_MSG_EXPIRE: |
26b15dad | 1759 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
1760 | case XFRM_MSG_NEWAE: |
1761 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
1762 | case XFRM_MSG_DELSA: |
1763 | case XFRM_MSG_UPDSA: | |
1764 | case XFRM_MSG_NEWSA: | |
26b15dad | 1765 | return xfrm_notify_sa(x, c); |
f60f6b8f | 1766 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
1767 | return xfrm_notify_sa_flush(c); |
1768 | default: | |
1769 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
1770 | break; | |
1771 | } | |
1772 | ||
1773 | return 0; | |
1774 | ||
1775 | } | |
1776 | ||
1da177e4 LT |
1777 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
1778 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
1779 | int dir) | |
1780 | { | |
1781 | struct xfrm_user_acquire *ua; | |
1782 | struct nlmsghdr *nlh; | |
1783 | unsigned char *b = skb->tail; | |
1784 | __u32 seq = xfrm_get_acqseq(); | |
1785 | ||
1786 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, | |
1787 | sizeof(*ua)); | |
1788 | ua = NLMSG_DATA(nlh); | |
1789 | nlh->nlmsg_flags = 0; | |
1790 | ||
1791 | memcpy(&ua->id, &x->id, sizeof(ua->id)); | |
1792 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
1793 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
1794 | copy_to_user_policy(xp, &ua->policy, dir); | |
1795 | ua->aalgos = xt->aalgos; | |
1796 | ua->ealgos = xt->ealgos; | |
1797 | ua->calgos = xt->calgos; | |
1798 | ua->seq = x->km.seq = seq; | |
1799 | ||
1800 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1801 | goto nlmsg_failure; | |
0d681623 | 1802 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 1803 | goto nlmsg_failure; |
1da177e4 LT |
1804 | |
1805 | nlh->nlmsg_len = skb->tail - b; | |
1806 | return skb->len; | |
1807 | ||
1808 | nlmsg_failure: | |
1809 | skb_trim(skb, b - skb->data); | |
1810 | return -1; | |
1811 | } | |
1812 | ||
1813 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
1814 | struct xfrm_policy *xp, int dir) | |
1815 | { | |
1816 | struct sk_buff *skb; | |
1817 | size_t len; | |
1818 | ||
1819 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
1820 | len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); | |
df71837d | 1821 | len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); |
1da177e4 LT |
1822 | skb = alloc_skb(len, GFP_ATOMIC); |
1823 | if (skb == NULL) | |
1824 | return -ENOMEM; | |
1825 | ||
1826 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
1827 | BUG(); | |
1828 | ||
ac6d439d PM |
1829 | NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; |
1830 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); | |
1da177e4 LT |
1831 | } |
1832 | ||
1833 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
1834 | * or more templates. | |
1835 | */ | |
cb969f07 | 1836 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
1837 | u8 *data, int len, int *dir) |
1838 | { | |
1839 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
1840 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
1841 | struct xfrm_policy *xp; | |
1842 | int nr; | |
1843 | ||
cb969f07 | 1844 | switch (sk->sk_family) { |
1da177e4 LT |
1845 | case AF_INET: |
1846 | if (opt != IP_XFRM_POLICY) { | |
1847 | *dir = -EOPNOTSUPP; | |
1848 | return NULL; | |
1849 | } | |
1850 | break; | |
1851 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1852 | case AF_INET6: | |
1853 | if (opt != IPV6_XFRM_POLICY) { | |
1854 | *dir = -EOPNOTSUPP; | |
1855 | return NULL; | |
1856 | } | |
1857 | break; | |
1858 | #endif | |
1859 | default: | |
1860 | *dir = -EINVAL; | |
1861 | return NULL; | |
1862 | } | |
1863 | ||
1864 | *dir = -EINVAL; | |
1865 | ||
1866 | if (len < sizeof(*p) || | |
1867 | verify_newpolicy_info(p)) | |
1868 | return NULL; | |
1869 | ||
1870 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
1871 | if (nr > XFRM_MAX_DEPTH) | |
1872 | return NULL; | |
1873 | ||
a4f1bac6 HX |
1874 | if (p->dir > XFRM_POLICY_OUT) |
1875 | return NULL; | |
1876 | ||
1da177e4 LT |
1877 | xp = xfrm_policy_alloc(GFP_KERNEL); |
1878 | if (xp == NULL) { | |
1879 | *dir = -ENOBUFS; | |
1880 | return NULL; | |
1881 | } | |
1882 | ||
1883 | copy_from_user_policy(xp, p); | |
1884 | copy_templates(xp, ut, nr); | |
1885 | ||
cb969f07 VY |
1886 | if (!xp->security) { |
1887 | int err = security_xfrm_sock_policy_alloc(xp, sk); | |
1888 | if (err) { | |
1889 | kfree(xp); | |
1890 | *dir = err; | |
1891 | return NULL; | |
1892 | } | |
1893 | } | |
1894 | ||
1da177e4 LT |
1895 | *dir = p->dir; |
1896 | ||
1897 | return xp; | |
1898 | } | |
1899 | ||
1900 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, | |
d51d081d | 1901 | int dir, struct km_event *c) |
1da177e4 LT |
1902 | { |
1903 | struct xfrm_user_polexpire *upe; | |
1904 | struct nlmsghdr *nlh; | |
d51d081d | 1905 | int hard = c->data.hard; |
1da177e4 LT |
1906 | unsigned char *b = skb->tail; |
1907 | ||
d51d081d | 1908 | nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); |
1da177e4 LT |
1909 | upe = NLMSG_DATA(nlh); |
1910 | nlh->nlmsg_flags = 0; | |
1911 | ||
1912 | copy_to_user_policy(xp, &upe->pol, dir); | |
1913 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1914 | goto nlmsg_failure; | |
df71837d TJ |
1915 | if (copy_to_user_sec_ctx(xp, skb)) |
1916 | goto nlmsg_failure; | |
1da177e4 LT |
1917 | upe->hard = !!hard; |
1918 | ||
1919 | nlh->nlmsg_len = skb->tail - b; | |
1920 | return skb->len; | |
1921 | ||
1922 | nlmsg_failure: | |
1923 | skb_trim(skb, b - skb->data); | |
1924 | return -1; | |
1925 | } | |
1926 | ||
26b15dad | 1927 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
1928 | { |
1929 | struct sk_buff *skb; | |
1930 | size_t len; | |
1931 | ||
1932 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
1933 | len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); | |
df71837d | 1934 | len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); |
1da177e4 LT |
1935 | skb = alloc_skb(len, GFP_ATOMIC); |
1936 | if (skb == NULL) | |
1937 | return -ENOMEM; | |
1938 | ||
d51d081d | 1939 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
1940 | BUG(); |
1941 | ||
ac6d439d PM |
1942 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
1943 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
1944 | } |
1945 | ||
26b15dad JHS |
1946 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
1947 | { | |
1948 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 1949 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
1950 | struct nlmsghdr *nlh; |
1951 | struct sk_buff *skb; | |
26b15dad JHS |
1952 | unsigned char *b; |
1953 | int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
0603eac0 HX |
1954 | int headlen; |
1955 | ||
1956 | headlen = sizeof(*p); | |
1957 | if (c->event == XFRM_MSG_DELPOLICY) { | |
1958 | len += RTA_SPACE(headlen); | |
1959 | headlen = sizeof(*id); | |
1960 | } | |
1961 | len += NLMSG_SPACE(headlen); | |
26b15dad JHS |
1962 | |
1963 | skb = alloc_skb(len, GFP_ATOMIC); | |
1964 | if (skb == NULL) | |
1965 | return -ENOMEM; | |
1966 | b = skb->tail; | |
1967 | ||
0603eac0 | 1968 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
1969 | |
1970 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
1971 | if (c->event == XFRM_MSG_DELPOLICY) { |
1972 | id = NLMSG_DATA(nlh); | |
1973 | memset(id, 0, sizeof(*id)); | |
1974 | id->dir = dir; | |
1975 | if (c->data.byid) | |
1976 | id->index = xp->index; | |
1977 | else | |
1978 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
1979 | ||
1980 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); | |
1981 | } | |
26b15dad JHS |
1982 | |
1983 | nlh->nlmsg_flags = 0; | |
1984 | ||
1985 | copy_to_user_policy(xp, p, dir); | |
1986 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1987 | goto nlmsg_failure; | |
1988 | ||
1989 | nlh->nlmsg_len = skb->tail - b; | |
1990 | ||
ac6d439d PM |
1991 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
1992 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
1993 | |
1994 | nlmsg_failure: | |
0603eac0 | 1995 | rtattr_failure: |
26b15dad JHS |
1996 | kfree_skb(skb); |
1997 | return -1; | |
1998 | } | |
1999 | ||
2000 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2001 | { | |
2002 | struct nlmsghdr *nlh; | |
2003 | struct sk_buff *skb; | |
2004 | unsigned char *b; | |
2005 | int len = NLMSG_LENGTH(0); | |
2006 | ||
2007 | skb = alloc_skb(len, GFP_ATOMIC); | |
2008 | if (skb == NULL) | |
2009 | return -ENOMEM; | |
2010 | b = skb->tail; | |
2011 | ||
2012 | ||
2013 | nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); | |
2014 | ||
2015 | nlh->nlmsg_len = skb->tail - b; | |
2016 | ||
ac6d439d PM |
2017 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
2018 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
2019 | |
2020 | nlmsg_failure: | |
2021 | kfree_skb(skb); | |
2022 | return -1; | |
2023 | } | |
2024 | ||
2025 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2026 | { | |
2027 | ||
2028 | switch (c->event) { | |
f60f6b8f HX |
2029 | case XFRM_MSG_NEWPOLICY: |
2030 | case XFRM_MSG_UPDPOLICY: | |
2031 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2032 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2033 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2034 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2035 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2036 | return xfrm_exp_policy_notify(xp, dir, c); |
2037 | default: | |
2038 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2039 | } | |
2040 | ||
2041 | return 0; | |
2042 | ||
2043 | } | |
2044 | ||
1da177e4 LT |
2045 | static struct xfrm_mgr netlink_mgr = { |
2046 | .id = "netlink", | |
2047 | .notify = xfrm_send_state_notify, | |
2048 | .acquire = xfrm_send_acquire, | |
2049 | .compile_policy = xfrm_compile_policy, | |
2050 | .notify_policy = xfrm_send_policy_notify, | |
2051 | }; | |
2052 | ||
2053 | static int __init xfrm_user_init(void) | |
2054 | { | |
be33690d PM |
2055 | struct sock *nlsk; |
2056 | ||
1da177e4 LT |
2057 | printk(KERN_INFO "Initializing IPsec netlink socket\n"); |
2058 | ||
be33690d PM |
2059 | nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, |
2060 | xfrm_netlink_rcv, THIS_MODULE); | |
2061 | if (nlsk == NULL) | |
1da177e4 | 2062 | return -ENOMEM; |
be33690d | 2063 | rcu_assign_pointer(xfrm_nl, nlsk); |
1da177e4 LT |
2064 | |
2065 | xfrm_register_km(&netlink_mgr); | |
2066 | ||
2067 | return 0; | |
2068 | } | |
2069 | ||
2070 | static void __exit xfrm_user_exit(void) | |
2071 | { | |
be33690d PM |
2072 | struct sock *nlsk = xfrm_nl; |
2073 | ||
1da177e4 | 2074 | xfrm_unregister_km(&netlink_mgr); |
be33690d PM |
2075 | rcu_assign_pointer(xfrm_nl, NULL); |
2076 | synchronize_rcu(); | |
2077 | sock_release(nlsk->sk_socket); | |
1da177e4 LT |
2078 | } |
2079 | ||
2080 | module_init(xfrm_user_init); | |
2081 | module_exit(xfrm_user_exit); | |
2082 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2083 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2084 |