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; | |
3ff50b79 | 74 | } |
1da177e4 LT |
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; | |
3ff50b79 | 155 | } |
1da177e4 LT |
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; | |
3ff50b79 | 195 | } |
1da177e4 LT |
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; | |
3ff50b79 | 220 | } |
1da177e4 LT |
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 | ||
28d8909b JHS |
675 | static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
676 | { | |
677 | struct xfrm_sadinfo si; | |
678 | struct nlmsghdr *nlh; | |
679 | u32 *f; | |
680 | ||
681 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
682 | if (nlh == NULL) /* shouldnt really happen ... */ | |
683 | return -EMSGSIZE; | |
684 | ||
685 | f = nlmsg_data(nlh); | |
686 | *f = flags; | |
687 | xfrm_sad_getinfo(&si); | |
688 | ||
689 | if (flags & XFRM_SAD_HMASK) | |
690 | NLA_PUT_U32(skb, XFRMA_SADHMASK, si.sadhcnt); | |
691 | if (flags & XFRM_SAD_HMAX) | |
692 | NLA_PUT_U32(skb, XFRMA_SADHMAX, si.sadhmcnt); | |
693 | if (flags & XFRM_SAD_CNT) | |
694 | NLA_PUT_U32(skb, XFRMA_SADCNT, si.sadcnt); | |
695 | ||
696 | return nlmsg_end(skb, nlh); | |
697 | ||
698 | nla_put_failure: | |
699 | nlmsg_cancel(skb, nlh); | |
700 | return -EMSGSIZE; | |
701 | } | |
702 | ||
703 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
704 | struct rtattr **xfrma) | |
705 | { | |
706 | struct sk_buff *r_skb; | |
707 | u32 *flags = NLMSG_DATA(nlh); | |
708 | u32 spid = NETLINK_CB(skb).pid; | |
709 | u32 seq = nlh->nlmsg_seq; | |
710 | int len = NLMSG_LENGTH(sizeof(u32)); | |
711 | ||
712 | if (*flags & XFRM_SAD_HMASK) | |
713 | len += RTA_SPACE(sizeof(u32)); | |
714 | if (*flags & XFRM_SAD_HMAX) | |
715 | len += RTA_SPACE(sizeof(u32)); | |
716 | if (*flags & XFRM_SAD_CNT) | |
717 | len += RTA_SPACE(sizeof(u32)); | |
718 | ||
719 | r_skb = alloc_skb(len, GFP_ATOMIC); | |
720 | ||
721 | if (r_skb == NULL) | |
722 | return -ENOMEM; | |
723 | ||
724 | if (build_sadinfo(r_skb, spid, seq, *flags) < 0) | |
725 | BUG(); | |
726 | ||
727 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
728 | } | |
729 | ||
22e70050 CH |
730 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
731 | struct rtattr **xfrma) | |
1da177e4 LT |
732 | { |
733 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); | |
734 | struct xfrm_state *x; | |
735 | struct sk_buff *resp_skb; | |
eb2971b6 | 736 | int err = -ESRCH; |
1da177e4 | 737 | |
22e70050 | 738 | x = xfrm_user_state_lookup(p, xfrma, &err); |
1da177e4 LT |
739 | if (x == NULL) |
740 | goto out_noput; | |
741 | ||
742 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
743 | if (IS_ERR(resp_skb)) { | |
744 | err = PTR_ERR(resp_skb); | |
745 | } else { | |
746 | err = netlink_unicast(xfrm_nl, resp_skb, | |
747 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
748 | } | |
749 | xfrm_state_put(x); | |
750 | out_noput: | |
751 | return err; | |
752 | } | |
753 | ||
754 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
755 | { | |
756 | switch (p->info.id.proto) { | |
757 | case IPPROTO_AH: | |
758 | case IPPROTO_ESP: | |
759 | break; | |
760 | ||
761 | case IPPROTO_COMP: | |
762 | /* IPCOMP spi is 16-bits. */ | |
763 | if (p->max >= 0x10000) | |
764 | return -EINVAL; | |
765 | break; | |
766 | ||
767 | default: | |
768 | return -EINVAL; | |
3ff50b79 | 769 | } |
1da177e4 LT |
770 | |
771 | if (p->min > p->max) | |
772 | return -EINVAL; | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
22e70050 CH |
777 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
778 | struct rtattr **xfrma) | |
1da177e4 LT |
779 | { |
780 | struct xfrm_state *x; | |
781 | struct xfrm_userspi_info *p; | |
782 | struct sk_buff *resp_skb; | |
783 | xfrm_address_t *daddr; | |
784 | int family; | |
785 | int err; | |
786 | ||
787 | p = NLMSG_DATA(nlh); | |
788 | err = verify_userspi_info(p); | |
789 | if (err) | |
790 | goto out_noput; | |
791 | ||
792 | family = p->info.family; | |
793 | daddr = &p->info.id.daddr; | |
794 | ||
795 | x = NULL; | |
796 | if (p->info.seq) { | |
797 | x = xfrm_find_acq_byseq(p->info.seq); | |
798 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
799 | xfrm_state_put(x); | |
800 | x = NULL; | |
801 | } | |
802 | } | |
803 | ||
804 | if (!x) | |
805 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
806 | p->info.id.proto, daddr, | |
807 | &p->info.saddr, 1, | |
808 | family); | |
809 | err = -ENOENT; | |
810 | if (x == NULL) | |
811 | goto out_noput; | |
812 | ||
813 | resp_skb = ERR_PTR(-ENOENT); | |
814 | ||
815 | spin_lock_bh(&x->lock); | |
816 | if (x->km.state != XFRM_STATE_DEAD) { | |
817 | xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); | |
818 | if (x->id.spi) | |
819 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
820 | } | |
821 | spin_unlock_bh(&x->lock); | |
822 | ||
823 | if (IS_ERR(resp_skb)) { | |
824 | err = PTR_ERR(resp_skb); | |
825 | goto out; | |
826 | } | |
827 | ||
828 | err = netlink_unicast(xfrm_nl, resp_skb, | |
829 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
830 | ||
831 | out: | |
832 | xfrm_state_put(x); | |
833 | out_noput: | |
834 | return err; | |
835 | } | |
836 | ||
b798a9ed | 837 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
838 | { |
839 | switch (dir) { | |
840 | case XFRM_POLICY_IN: | |
841 | case XFRM_POLICY_OUT: | |
842 | case XFRM_POLICY_FWD: | |
843 | break; | |
844 | ||
845 | default: | |
846 | return -EINVAL; | |
3ff50b79 | 847 | } |
1da177e4 LT |
848 | |
849 | return 0; | |
850 | } | |
851 | ||
b798a9ed | 852 | static int verify_policy_type(u8 type) |
f7b6983f MN |
853 | { |
854 | switch (type) { | |
855 | case XFRM_POLICY_TYPE_MAIN: | |
856 | #ifdef CONFIG_XFRM_SUB_POLICY | |
857 | case XFRM_POLICY_TYPE_SUB: | |
858 | #endif | |
859 | break; | |
860 | ||
861 | default: | |
862 | return -EINVAL; | |
3ff50b79 | 863 | } |
f7b6983f MN |
864 | |
865 | return 0; | |
866 | } | |
867 | ||
1da177e4 LT |
868 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
869 | { | |
870 | switch (p->share) { | |
871 | case XFRM_SHARE_ANY: | |
872 | case XFRM_SHARE_SESSION: | |
873 | case XFRM_SHARE_USER: | |
874 | case XFRM_SHARE_UNIQUE: | |
875 | break; | |
876 | ||
877 | default: | |
878 | return -EINVAL; | |
3ff50b79 | 879 | } |
1da177e4 LT |
880 | |
881 | switch (p->action) { | |
882 | case XFRM_POLICY_ALLOW: | |
883 | case XFRM_POLICY_BLOCK: | |
884 | break; | |
885 | ||
886 | default: | |
887 | return -EINVAL; | |
3ff50b79 | 888 | } |
1da177e4 LT |
889 | |
890 | switch (p->sel.family) { | |
891 | case AF_INET: | |
892 | break; | |
893 | ||
894 | case AF_INET6: | |
895 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
896 | break; | |
897 | #else | |
898 | return -EAFNOSUPPORT; | |
899 | #endif | |
900 | ||
901 | default: | |
902 | return -EINVAL; | |
3ff50b79 | 903 | } |
1da177e4 LT |
904 | |
905 | return verify_policy_dir(p->dir); | |
906 | } | |
907 | ||
df71837d TJ |
908 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) |
909 | { | |
910 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; | |
911 | struct xfrm_user_sec_ctx *uctx; | |
912 | ||
913 | if (!rt) | |
914 | return 0; | |
915 | ||
916 | uctx = RTA_DATA(rt); | |
917 | return security_xfrm_policy_alloc(pol, uctx); | |
918 | } | |
919 | ||
1da177e4 LT |
920 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
921 | int nr) | |
922 | { | |
923 | int i; | |
924 | ||
925 | xp->xfrm_nr = nr; | |
926 | for (i = 0; i < nr; i++, ut++) { | |
927 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
928 | ||
929 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
930 | memcpy(&t->saddr, &ut->saddr, | |
931 | sizeof(xfrm_address_t)); | |
932 | t->reqid = ut->reqid; | |
933 | t->mode = ut->mode; | |
934 | t->share = ut->share; | |
935 | t->optional = ut->optional; | |
936 | t->aalgos = ut->aalgos; | |
937 | t->ealgos = ut->ealgos; | |
938 | t->calgos = ut->calgos; | |
8511d01d | 939 | t->encap_family = ut->family; |
1da177e4 LT |
940 | } |
941 | } | |
942 | ||
b4ad86bf DM |
943 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
944 | { | |
945 | int i; | |
946 | ||
947 | if (nr > XFRM_MAX_DEPTH) | |
948 | return -EINVAL; | |
949 | ||
950 | for (i = 0; i < nr; i++) { | |
951 | /* We never validated the ut->family value, so many | |
952 | * applications simply leave it at zero. The check was | |
953 | * never made and ut->family was ignored because all | |
954 | * templates could be assumed to have the same family as | |
955 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
956 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
957 | */ | |
958 | if (!ut[i].family) | |
959 | ut[i].family = family; | |
960 | ||
961 | switch (ut[i].family) { | |
962 | case AF_INET: | |
963 | break; | |
964 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
965 | case AF_INET6: | |
966 | break; | |
967 | #endif | |
968 | default: | |
969 | return -EINVAL; | |
3ff50b79 | 970 | } |
b4ad86bf DM |
971 | } |
972 | ||
973 | return 0; | |
974 | } | |
975 | ||
1da177e4 LT |
976 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) |
977 | { | |
978 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
1da177e4 LT |
979 | |
980 | if (!rt) { | |
981 | pol->xfrm_nr = 0; | |
982 | } else { | |
b4ad86bf DM |
983 | struct xfrm_user_tmpl *utmpl = RTA_DATA(rt); |
984 | int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); | |
985 | int err; | |
1da177e4 | 986 | |
b4ad86bf DM |
987 | err = validate_tmpl(nr, utmpl, pol->family); |
988 | if (err) | |
989 | return err; | |
1da177e4 LT |
990 | |
991 | copy_templates(pol, RTA_DATA(rt), nr); | |
992 | } | |
993 | return 0; | |
994 | } | |
995 | ||
f7b6983f MN |
996 | static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma) |
997 | { | |
998 | struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1]; | |
999 | struct xfrm_userpolicy_type *upt; | |
b798a9ed | 1000 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1001 | int err; |
1002 | ||
1003 | if (rt) { | |
1004 | if (rt->rta_len < sizeof(*upt)) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | upt = RTA_DATA(rt); | |
1008 | type = upt->type; | |
1009 | } | |
1010 | ||
1011 | err = verify_policy_type(type); | |
1012 | if (err) | |
1013 | return err; | |
1014 | ||
1015 | *tp = type; | |
1016 | return 0; | |
1017 | } | |
1018 | ||
1da177e4 LT |
1019 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1020 | { | |
1021 | xp->priority = p->priority; | |
1022 | xp->index = p->index; | |
1023 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1024 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1025 | xp->action = p->action; | |
1026 | xp->flags = p->flags; | |
1027 | xp->family = p->sel.family; | |
1028 | /* XXX xp->share = p->share; */ | |
1029 | } | |
1030 | ||
1031 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1032 | { | |
1033 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1034 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1035 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1036 | p->priority = xp->priority; | |
1037 | p->index = xp->index; | |
1038 | p->sel.family = xp->family; | |
1039 | p->dir = dir; | |
1040 | p->action = xp->action; | |
1041 | p->flags = xp->flags; | |
1042 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1043 | } | |
1044 | ||
1045 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) | |
1046 | { | |
1047 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
1048 | int err; | |
1049 | ||
1050 | if (!xp) { | |
1051 | *errp = -ENOMEM; | |
1052 | return NULL; | |
1053 | } | |
1054 | ||
1055 | copy_from_user_policy(xp, p); | |
df71837d | 1056 | |
f7b6983f MN |
1057 | err = copy_from_user_policy_type(&xp->type, xfrma); |
1058 | if (err) | |
1059 | goto error; | |
1060 | ||
df71837d TJ |
1061 | if (!(err = copy_from_user_tmpl(xp, xfrma))) |
1062 | err = copy_from_user_sec_ctx(xp, xfrma); | |
f7b6983f MN |
1063 | if (err) |
1064 | goto error; | |
1da177e4 LT |
1065 | |
1066 | return xp; | |
f7b6983f MN |
1067 | error: |
1068 | *errp = err; | |
1069 | kfree(xp); | |
1070 | return NULL; | |
1da177e4 LT |
1071 | } |
1072 | ||
22e70050 CH |
1073 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1074 | struct rtattr **xfrma) | |
1da177e4 LT |
1075 | { |
1076 | struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); | |
1077 | struct xfrm_policy *xp; | |
26b15dad | 1078 | struct km_event c; |
1da177e4 LT |
1079 | int err; |
1080 | int excl; | |
1081 | ||
1082 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1083 | if (err) |
1084 | return err; | |
22e70050 | 1085 | err = verify_sec_ctx_len(xfrma); |
1da177e4 LT |
1086 | if (err) |
1087 | return err; | |
1088 | ||
22e70050 | 1089 | xp = xfrm_policy_construct(p, xfrma, &err); |
1da177e4 LT |
1090 | if (!xp) |
1091 | return err; | |
1092 | ||
26b15dad JHS |
1093 | /* shouldnt excl be based on nlh flags?? |
1094 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1095 | * in netlink excl is a flag and you wouldnt need | |
1096 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1097 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1098 | err = xfrm_policy_insert(p->dir, xp, excl); | |
161a09e7 JL |
1099 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1100 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1101 | ||
1da177e4 | 1102 | if (err) { |
5f8ac64b | 1103 | security_xfrm_policy_free(xp); |
1da177e4 LT |
1104 | kfree(xp); |
1105 | return err; | |
1106 | } | |
1107 | ||
f60f6b8f | 1108 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1109 | c.seq = nlh->nlmsg_seq; |
1110 | c.pid = nlh->nlmsg_pid; | |
1111 | km_policy_notify(xp, p->dir, &c); | |
1112 | ||
1da177e4 LT |
1113 | xfrm_pol_put(xp); |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1119 | { | |
1120 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1121 | int i; | |
1122 | ||
1123 | if (xp->xfrm_nr == 0) | |
1124 | return 0; | |
1125 | ||
1126 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1127 | struct xfrm_user_tmpl *up = &vec[i]; | |
1128 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1129 | ||
1130 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1131 | up->family = kp->encap_family; |
1da177e4 LT |
1132 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1133 | up->reqid = kp->reqid; | |
1134 | up->mode = kp->mode; | |
1135 | up->share = kp->share; | |
1136 | up->optional = kp->optional; | |
1137 | up->aalgos = kp->aalgos; | |
1138 | up->ealgos = kp->ealgos; | |
1139 | up->calgos = kp->calgos; | |
1140 | } | |
1141 | RTA_PUT(skb, XFRMA_TMPL, | |
1142 | (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), | |
1143 | vec); | |
1144 | ||
1145 | return 0; | |
1146 | ||
1147 | rtattr_failure: | |
1148 | return -1; | |
1149 | } | |
1150 | ||
0d681623 | 1151 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
df71837d | 1152 | { |
0d681623 SH |
1153 | int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len; |
1154 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
1155 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1156 | ||
1157 | uctx->exttype = XFRMA_SEC_CTX; | |
1158 | uctx->len = ctx_size; | |
1159 | uctx->ctx_doi = s->ctx_doi; | |
1160 | uctx->ctx_alg = s->ctx_alg; | |
1161 | uctx->ctx_len = s->ctx_len; | |
1162 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
a716c119 | 1163 | return 0; |
df71837d | 1164 | |
0d681623 SH |
1165 | rtattr_failure: |
1166 | return -1; | |
1167 | } | |
1168 | ||
1169 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1170 | { | |
1171 | if (x->security) { | |
1172 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1173 | } |
1174 | return 0; | |
0d681623 | 1175 | } |
df71837d | 1176 | |
0d681623 SH |
1177 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1178 | { | |
1179 | if (xp->security) { | |
1180 | return copy_sec_ctx(xp->security, skb); | |
1181 | } | |
1182 | return 0; | |
df71837d TJ |
1183 | } |
1184 | ||
f7b6983f | 1185 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1186 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1187 | { |
1188 | struct xfrm_userpolicy_type upt; | |
1189 | ||
1190 | memset(&upt, 0, sizeof(upt)); | |
1459bb36 | 1191 | upt.type = type; |
f7b6983f MN |
1192 | |
1193 | RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); | |
1194 | ||
1195 | return 0; | |
1196 | ||
1197 | rtattr_failure: | |
1198 | return -1; | |
1199 | } | |
1200 | ||
1201 | #else | |
b798a9ed | 1202 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1203 | { |
1204 | return 0; | |
1205 | } | |
1206 | #endif | |
1207 | ||
1da177e4 LT |
1208 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1209 | { | |
1210 | struct xfrm_dump_info *sp = ptr; | |
1211 | struct xfrm_userpolicy_info *p; | |
1212 | struct sk_buff *in_skb = sp->in_skb; | |
1213 | struct sk_buff *skb = sp->out_skb; | |
1214 | struct nlmsghdr *nlh; | |
27a884dc | 1215 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
1216 | |
1217 | if (sp->this_idx < sp->start_idx) | |
1218 | goto out; | |
1219 | ||
1220 | nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, | |
1221 | sp->nlmsg_seq, | |
1222 | XFRM_MSG_NEWPOLICY, sizeof(*p)); | |
1223 | p = NLMSG_DATA(nlh); | |
1224 | nlh->nlmsg_flags = sp->nlmsg_flags; | |
1225 | ||
1226 | copy_to_user_policy(xp, p, dir); | |
1227 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1228 | goto nlmsg_failure; | |
df71837d TJ |
1229 | if (copy_to_user_sec_ctx(xp, skb)) |
1230 | goto nlmsg_failure; | |
1459bb36 | 1231 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1232 | goto nlmsg_failure; |
1da177e4 | 1233 | |
27a884dc | 1234 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
1235 | out: |
1236 | sp->this_idx++; | |
1237 | return 0; | |
1238 | ||
1239 | nlmsg_failure: | |
dc5fc579 | 1240 | nlmsg_trim(skb, b); |
1da177e4 LT |
1241 | return -1; |
1242 | } | |
1243 | ||
1244 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
1245 | { | |
1246 | struct xfrm_dump_info info; | |
1247 | ||
1248 | info.in_skb = cb->skb; | |
1249 | info.out_skb = skb; | |
1250 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1251 | info.nlmsg_flags = NLM_F_MULTI; | |
1252 | info.this_idx = 0; | |
1253 | info.start_idx = cb->args[0]; | |
f7b6983f MN |
1254 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); |
1255 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1256 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); | |
1257 | #endif | |
1da177e4 LT |
1258 | cb->args[0] = info.this_idx; |
1259 | ||
1260 | return skb->len; | |
1261 | } | |
1262 | ||
1263 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1264 | struct xfrm_policy *xp, | |
1265 | int dir, u32 seq) | |
1266 | { | |
1267 | struct xfrm_dump_info info; | |
1268 | struct sk_buff *skb; | |
1269 | ||
1270 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1271 | if (!skb) | |
1272 | return ERR_PTR(-ENOMEM); | |
1273 | ||
1da177e4 LT |
1274 | info.in_skb = in_skb; |
1275 | info.out_skb = skb; | |
1276 | info.nlmsg_seq = seq; | |
1277 | info.nlmsg_flags = 0; | |
1278 | info.this_idx = info.start_idx = 0; | |
1279 | ||
1280 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1281 | kfree_skb(skb); | |
1282 | return NULL; | |
1283 | } | |
1284 | ||
1285 | return skb; | |
1286 | } | |
1287 | ||
22e70050 CH |
1288 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1289 | struct rtattr **xfrma) | |
1da177e4 LT |
1290 | { |
1291 | struct xfrm_policy *xp; | |
1292 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1293 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1294 | int err; |
26b15dad | 1295 | struct km_event c; |
1da177e4 LT |
1296 | int delete; |
1297 | ||
1298 | p = NLMSG_DATA(nlh); | |
1299 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; | |
1300 | ||
22e70050 | 1301 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1302 | if (err) |
1303 | return err; | |
1304 | ||
1da177e4 LT |
1305 | err = verify_policy_dir(p->dir); |
1306 | if (err) | |
1307 | return err; | |
1308 | ||
1309 | if (p->index) | |
ef41aaa0 | 1310 | xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); |
df71837d | 1311 | else { |
22e70050 | 1312 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; |
df71837d TJ |
1313 | struct xfrm_policy tmp; |
1314 | ||
22e70050 | 1315 | err = verify_sec_ctx_len(xfrma); |
df71837d TJ |
1316 | if (err) |
1317 | return err; | |
1318 | ||
1319 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1320 | if (rt) { | |
1321 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1322 | ||
1323 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1324 | return err; | |
1325 | } | |
ef41aaa0 EP |
1326 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1327 | delete, &err); | |
df71837d TJ |
1328 | security_xfrm_policy_free(&tmp); |
1329 | } | |
1da177e4 LT |
1330 | if (xp == NULL) |
1331 | return -ENOENT; | |
1332 | ||
1333 | if (!delete) { | |
1334 | struct sk_buff *resp_skb; | |
1335 | ||
1336 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1337 | if (IS_ERR(resp_skb)) { | |
1338 | err = PTR_ERR(resp_skb); | |
1339 | } else { | |
1340 | err = netlink_unicast(xfrm_nl, resp_skb, | |
1341 | NETLINK_CB(skb).pid, | |
1342 | MSG_DONTWAIT); | |
1343 | } | |
26b15dad | 1344 | } else { |
13fcfbb0 DM |
1345 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1346 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1347 | ||
1348 | if (err != 0) | |
c8c05a8e | 1349 | goto out; |
13fcfbb0 | 1350 | |
e7443892 | 1351 | c.data.byid = p->index; |
f60f6b8f | 1352 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1353 | c.seq = nlh->nlmsg_seq; |
1354 | c.pid = nlh->nlmsg_pid; | |
1355 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1356 | } |
1357 | ||
c8c05a8e | 1358 | out: |
ef41aaa0 | 1359 | xfrm_pol_put(xp); |
1da177e4 LT |
1360 | return err; |
1361 | } | |
1362 | ||
22e70050 CH |
1363 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
1364 | struct rtattr **xfrma) | |
1da177e4 | 1365 | { |
26b15dad | 1366 | struct km_event c; |
1da177e4 | 1367 | struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); |
161a09e7 | 1368 | struct xfrm_audit audit_info; |
1da177e4 | 1369 | |
161a09e7 JL |
1370 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1371 | audit_info.secid = NETLINK_CB(skb).sid; | |
1372 | xfrm_state_flush(p->proto, &audit_info); | |
bf08867f | 1373 | c.data.proto = p->proto; |
f60f6b8f | 1374 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1375 | c.seq = nlh->nlmsg_seq; |
1376 | c.pid = nlh->nlmsg_pid; | |
1377 | km_state_notify(NULL, &c); | |
1378 | ||
1da177e4 LT |
1379 | return 0; |
1380 | } | |
1381 | ||
d51d081d JHS |
1382 | |
1383 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1384 | { | |
1385 | struct xfrm_aevent_id *id; | |
1386 | struct nlmsghdr *nlh; | |
1387 | struct xfrm_lifetime_cur ltime; | |
27a884dc | 1388 | unsigned char *b = skb_tail_pointer(skb); |
d51d081d JHS |
1389 | |
1390 | nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id)); | |
1391 | id = NLMSG_DATA(nlh); | |
1392 | nlh->nlmsg_flags = 0; | |
1393 | ||
2b5f6dcc | 1394 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1395 | id->sa_id.spi = x->id.spi; |
1396 | id->sa_id.family = x->props.family; | |
1397 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1398 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1399 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1400 | id->flags = c->data.aevent; |
1401 | ||
1402 | RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); | |
1403 | ||
1404 | ltime.bytes = x->curlft.bytes; | |
1405 | ltime.packets = x->curlft.packets; | |
1406 | ltime.add_time = x->curlft.add_time; | |
1407 | ltime.use_time = x->curlft.use_time; | |
1408 | ||
1409 | RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); | |
1410 | ||
1411 | if (id->flags&XFRM_AE_RTHR) { | |
1412 | RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); | |
1413 | } | |
1414 | ||
1415 | if (id->flags&XFRM_AE_ETHR) { | |
1416 | u32 etimer = x->replay_maxage*10/HZ; | |
1417 | RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); | |
1418 | } | |
1419 | ||
27a884dc | 1420 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
d51d081d JHS |
1421 | return skb->len; |
1422 | ||
1423 | rtattr_failure: | |
1424 | nlmsg_failure: | |
dc5fc579 | 1425 | nlmsg_trim(skb, b); |
d51d081d JHS |
1426 | return -1; |
1427 | } | |
1428 | ||
22e70050 CH |
1429 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
1430 | struct rtattr **xfrma) | |
d51d081d JHS |
1431 | { |
1432 | struct xfrm_state *x; | |
1433 | struct sk_buff *r_skb; | |
1434 | int err; | |
1435 | struct km_event c; | |
1436 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1437 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
1438 | struct xfrm_usersa_id *id = &p->sa_id; | |
1439 | ||
1440 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
1441 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
1442 | ||
1443 | if (p->flags&XFRM_AE_RTHR) | |
1444 | len+=RTA_SPACE(sizeof(u32)); | |
1445 | ||
1446 | if (p->flags&XFRM_AE_ETHR) | |
1447 | len+=RTA_SPACE(sizeof(u32)); | |
1448 | ||
1449 | r_skb = alloc_skb(len, GFP_ATOMIC); | |
1450 | if (r_skb == NULL) | |
1451 | return -ENOMEM; | |
1452 | ||
1453 | x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); | |
1454 | if (x == NULL) { | |
b08d5840 | 1455 | kfree_skb(r_skb); |
d51d081d JHS |
1456 | return -ESRCH; |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * XXX: is this lock really needed - none of the other | |
1461 | * gets lock (the concern is things getting updated | |
1462 | * while we are still reading) - jhs | |
1463 | */ | |
1464 | spin_lock_bh(&x->lock); | |
1465 | c.data.aevent = p->flags; | |
1466 | c.seq = nlh->nlmsg_seq; | |
1467 | c.pid = nlh->nlmsg_pid; | |
1468 | ||
1469 | if (build_aevent(r_skb, x, &c) < 0) | |
1470 | BUG(); | |
1471 | err = netlink_unicast(xfrm_nl, r_skb, | |
1472 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1473 | spin_unlock_bh(&x->lock); | |
1474 | xfrm_state_put(x); | |
1475 | return err; | |
1476 | } | |
1477 | ||
22e70050 CH |
1478 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
1479 | struct rtattr **xfrma) | |
d51d081d JHS |
1480 | { |
1481 | struct xfrm_state *x; | |
1482 | struct km_event c; | |
1483 | int err = - EINVAL; | |
1484 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1485 | struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; | |
1486 | struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; | |
1487 | ||
1488 | if (!lt && !rp) | |
1489 | return err; | |
1490 | ||
1491 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1492 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1493 | return err; | |
1494 | ||
1495 | x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
1496 | if (x == NULL) | |
1497 | return -ESRCH; | |
1498 | ||
1499 | if (x->km.state != XFRM_STATE_VALID) | |
1500 | goto out; | |
1501 | ||
1502 | spin_lock_bh(&x->lock); | |
22e70050 | 1503 | err = xfrm_update_ae_params(x, xfrma); |
d51d081d JHS |
1504 | spin_unlock_bh(&x->lock); |
1505 | if (err < 0) | |
1506 | goto out; | |
1507 | ||
1508 | c.event = nlh->nlmsg_type; | |
1509 | c.seq = nlh->nlmsg_seq; | |
1510 | c.pid = nlh->nlmsg_pid; | |
1511 | c.data.aevent = XFRM_AE_CU; | |
1512 | km_state_notify(x, &c); | |
1513 | err = 0; | |
1514 | out: | |
1515 | xfrm_state_put(x); | |
1516 | return err; | |
1517 | } | |
1518 | ||
22e70050 CH |
1519 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1520 | struct rtattr **xfrma) | |
1da177e4 | 1521 | { |
f7b6983f | 1522 | struct km_event c; |
b798a9ed | 1523 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1524 | int err; |
161a09e7 | 1525 | struct xfrm_audit audit_info; |
f7b6983f | 1526 | |
22e70050 | 1527 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1528 | if (err) |
1529 | return err; | |
26b15dad | 1530 | |
161a09e7 JL |
1531 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1532 | audit_info.secid = NETLINK_CB(skb).sid; | |
1533 | xfrm_policy_flush(type, &audit_info); | |
f7b6983f | 1534 | c.data.type = type; |
f60f6b8f | 1535 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1536 | c.seq = nlh->nlmsg_seq; |
1537 | c.pid = nlh->nlmsg_pid; | |
1538 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1539 | return 0; |
1540 | } | |
1541 | ||
22e70050 CH |
1542 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1543 | struct rtattr **xfrma) | |
6c5c8ca7 JHS |
1544 | { |
1545 | struct xfrm_policy *xp; | |
1546 | struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); | |
1547 | struct xfrm_userpolicy_info *p = &up->pol; | |
b798a9ed | 1548 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1549 | int err = -ENOENT; |
1550 | ||
22e70050 | 1551 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1552 | if (err) |
1553 | return err; | |
1554 | ||
6c5c8ca7 | 1555 | if (p->index) |
ef41aaa0 | 1556 | xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1557 | else { |
22e70050 | 1558 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; |
6c5c8ca7 JHS |
1559 | struct xfrm_policy tmp; |
1560 | ||
22e70050 | 1561 | err = verify_sec_ctx_len(xfrma); |
6c5c8ca7 JHS |
1562 | if (err) |
1563 | return err; | |
1564 | ||
1565 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1566 | if (rt) { | |
1567 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1568 | ||
1569 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1570 | return err; | |
1571 | } | |
ef41aaa0 EP |
1572 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1573 | 0, &err); | |
6c5c8ca7 JHS |
1574 | security_xfrm_policy_free(&tmp); |
1575 | } | |
1576 | ||
1577 | if (xp == NULL) | |
ef41aaa0 EP |
1578 | return -ENOENT; |
1579 | read_lock(&xp->lock); | |
6c5c8ca7 JHS |
1580 | if (xp->dead) { |
1581 | read_unlock(&xp->lock); | |
1582 | goto out; | |
1583 | } | |
1584 | ||
1585 | read_unlock(&xp->lock); | |
1586 | err = 0; | |
1587 | if (up->hard) { | |
1588 | xfrm_policy_delete(xp, p->dir); | |
161a09e7 JL |
1589 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1590 | AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL); | |
1591 | ||
6c5c8ca7 JHS |
1592 | } else { |
1593 | // reset the timers here? | |
1594 | printk("Dont know what to do with soft policy expire\n"); | |
1595 | } | |
1596 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1597 | ||
1598 | out: | |
1599 | xfrm_pol_put(xp); | |
1600 | return err; | |
1601 | } | |
1602 | ||
22e70050 CH |
1603 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1604 | struct rtattr **xfrma) | |
53bc6b4d JHS |
1605 | { |
1606 | struct xfrm_state *x; | |
1607 | int err; | |
1608 | struct xfrm_user_expire *ue = NLMSG_DATA(nlh); | |
1609 | struct xfrm_usersa_info *p = &ue->state; | |
1610 | ||
1611 | x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); | |
53bc6b4d | 1612 | |
3a765aa5 | 1613 | err = -ENOENT; |
53bc6b4d JHS |
1614 | if (x == NULL) |
1615 | return err; | |
1616 | ||
53bc6b4d | 1617 | spin_lock_bh(&x->lock); |
3a765aa5 | 1618 | err = -EINVAL; |
53bc6b4d JHS |
1619 | if (x->km.state != XFRM_STATE_VALID) |
1620 | goto out; | |
1621 | km_state_expired(x, ue->hard, current->pid); | |
1622 | ||
161a09e7 | 1623 | if (ue->hard) { |
53bc6b4d | 1624 | __xfrm_state_delete(x); |
161a09e7 JL |
1625 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1626 | AUDIT_MAC_IPSEC_DELSA, 1, NULL, x); | |
1627 | } | |
3a765aa5 | 1628 | err = 0; |
53bc6b4d JHS |
1629 | out: |
1630 | spin_unlock_bh(&x->lock); | |
1631 | xfrm_state_put(x); | |
1632 | return err; | |
1633 | } | |
1634 | ||
22e70050 CH |
1635 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1636 | struct rtattr **xfrma) | |
980ebd25 JHS |
1637 | { |
1638 | struct xfrm_policy *xp; | |
1639 | struct xfrm_user_tmpl *ut; | |
1640 | int i; | |
1641 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
1642 | ||
1643 | struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); | |
1644 | struct xfrm_state *x = xfrm_state_alloc(); | |
1645 | int err = -ENOMEM; | |
1646 | ||
1647 | if (!x) | |
1648 | return err; | |
1649 | ||
1650 | err = verify_newpolicy_info(&ua->policy); | |
1651 | if (err) { | |
1652 | printk("BAD policy passed\n"); | |
1653 | kfree(x); | |
1654 | return err; | |
1655 | } | |
1656 | ||
1657 | /* build an XP */ | |
b4ad86bf DM |
1658 | xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); |
1659 | if (!xp) { | |
980ebd25 JHS |
1660 | kfree(x); |
1661 | return err; | |
1662 | } | |
1663 | ||
1664 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1665 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1666 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1667 | ||
1668 | ut = RTA_DATA(rt); | |
1669 | /* extract the templates and for each call km_key */ | |
1670 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1671 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1672 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1673 | x->props.mode = t->mode; | |
1674 | x->props.reqid = t->reqid; | |
1675 | x->props.family = ut->family; | |
1676 | t->aalgos = ua->aalgos; | |
1677 | t->ealgos = ua->ealgos; | |
1678 | t->calgos = ua->calgos; | |
1679 | err = km_query(x, t, xp); | |
1680 | ||
1681 | } | |
1682 | ||
1683 | kfree(x); | |
1684 | kfree(xp); | |
1685 | ||
1686 | return 0; | |
1687 | } | |
1688 | ||
5c79de6e SS |
1689 | #ifdef CONFIG_XFRM_MIGRATE |
1690 | static int verify_user_migrate(struct rtattr **xfrma) | |
1691 | { | |
1692 | struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; | |
1693 | struct xfrm_user_migrate *um; | |
1694 | ||
1695 | if (!rt) | |
1696 | return -EINVAL; | |
1697 | ||
1698 | if ((rt->rta_len - sizeof(*rt)) < sizeof(*um)) | |
1699 | return -EINVAL; | |
1700 | ||
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | static int copy_from_user_migrate(struct xfrm_migrate *ma, | |
1705 | struct rtattr **xfrma, int *num) | |
1706 | { | |
1707 | struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; | |
1708 | struct xfrm_user_migrate *um; | |
1709 | int i, num_migrate; | |
1710 | ||
1711 | um = RTA_DATA(rt); | |
1712 | num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um); | |
1713 | ||
1714 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1715 | return -EINVAL; | |
1716 | ||
1717 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1718 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1719 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1720 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1721 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1722 | ||
1723 | ma->proto = um->proto; | |
1724 | ma->mode = um->mode; | |
1725 | ma->reqid = um->reqid; | |
1726 | ||
1727 | ma->old_family = um->old_family; | |
1728 | ma->new_family = um->new_family; | |
1729 | } | |
1730 | ||
1731 | *num = i; | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
1736 | struct rtattr **xfrma) | |
1737 | { | |
1738 | struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh); | |
1739 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
1740 | u8 type; | |
1741 | int err; | |
1742 | int n = 0; | |
1743 | ||
1744 | err = verify_user_migrate((struct rtattr **)xfrma); | |
1745 | if (err) | |
1746 | return err; | |
1747 | ||
1748 | err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma); | |
1749 | if (err) | |
1750 | return err; | |
1751 | ||
1752 | err = copy_from_user_migrate((struct xfrm_migrate *)m, | |
1753 | (struct rtattr **)xfrma, &n); | |
1754 | if (err) | |
1755 | return err; | |
1756 | ||
1757 | if (!n) | |
1758 | return 0; | |
1759 | ||
1760 | xfrm_migrate(&pi->sel, pi->dir, type, m, n); | |
1761 | ||
1762 | return 0; | |
1763 | } | |
1764 | #else | |
1765 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
1766 | struct rtattr **xfrma) | |
1767 | { | |
1768 | return -ENOPROTOOPT; | |
1769 | } | |
1770 | #endif | |
1771 | ||
1772 | #ifdef CONFIG_XFRM_MIGRATE | |
1773 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1774 | { | |
1775 | struct xfrm_user_migrate um; | |
1776 | ||
1777 | memset(&um, 0, sizeof(um)); | |
1778 | um.proto = m->proto; | |
1779 | um.mode = m->mode; | |
1780 | um.reqid = m->reqid; | |
1781 | um.old_family = m->old_family; | |
1782 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1783 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1784 | um.new_family = m->new_family; | |
1785 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1786 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1787 | ||
1788 | RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um); | |
1789 | return 0; | |
1790 | ||
1791 | rtattr_failure: | |
1792 | return -1; | |
1793 | } | |
1794 | ||
1795 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, | |
1796 | int num_migrate, struct xfrm_selector *sel, | |
1797 | u8 dir, u8 type) | |
1798 | { | |
1799 | struct xfrm_migrate *mp; | |
1800 | struct xfrm_userpolicy_id *pol_id; | |
1801 | struct nlmsghdr *nlh; | |
27a884dc | 1802 | unsigned char *b = skb_tail_pointer(skb); |
5c79de6e SS |
1803 | int i; |
1804 | ||
1805 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id)); | |
1806 | pol_id = NLMSG_DATA(nlh); | |
1807 | nlh->nlmsg_flags = 0; | |
1808 | ||
1809 | /* copy data from selector, dir, and type to the pol_id */ | |
1810 | memset(pol_id, 0, sizeof(*pol_id)); | |
1811 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1812 | pol_id->dir = dir; | |
1813 | ||
1814 | if (copy_to_user_policy_type(type, skb) < 0) | |
1815 | goto nlmsg_failure; | |
1816 | ||
1817 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1818 | if (copy_to_user_migrate(mp, skb) < 0) | |
1819 | goto nlmsg_failure; | |
1820 | } | |
1821 | ||
27a884dc | 1822 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
5c79de6e SS |
1823 | return skb->len; |
1824 | nlmsg_failure: | |
dc5fc579 | 1825 | nlmsg_trim(skb, b); |
5c79de6e SS |
1826 | return -1; |
1827 | } | |
1828 | ||
1829 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1830 | struct xfrm_migrate *m, int num_migrate) | |
1831 | { | |
1832 | struct sk_buff *skb; | |
1833 | size_t len; | |
1834 | ||
1835 | len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate); | |
1836 | len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id)); | |
1837 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1838 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
1839 | #endif | |
1840 | skb = alloc_skb(len, GFP_ATOMIC); | |
1841 | if (skb == NULL) | |
1842 | return -ENOMEM; | |
1843 | ||
1844 | /* build migrate */ | |
1845 | if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) | |
1846 | BUG(); | |
1847 | ||
1848 | NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE; | |
1849 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, | |
1850 | GFP_ATOMIC); | |
1851 | } | |
1852 | #else | |
1853 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1854 | struct xfrm_migrate *m, int num_migrate) | |
1855 | { | |
1856 | return -ENOPROTOOPT; | |
1857 | } | |
1858 | #endif | |
d51d081d | 1859 | |
492b558b TG |
1860 | #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) |
1861 | ||
1862 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1863 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1864 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1865 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1866 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1867 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1868 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1869 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1870 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1871 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b TG |
1872 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
1873 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
6c5c8ca7 | 1874 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b TG |
1875 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
1876 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), | |
d51d081d JHS |
1877 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1878 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 1879 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 1880 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
1da177e4 LT |
1881 | }; |
1882 | ||
492b558b TG |
1883 | #undef XMSGSIZE |
1884 | ||
1da177e4 | 1885 | static struct xfrm_link { |
22e70050 | 1886 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **); |
1da177e4 | 1887 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
492b558b TG |
1888 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1889 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1890 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1891 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1892 | .dump = xfrm_dump_sa }, | |
1893 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1894 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1895 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1896 | .dump = xfrm_dump_policy }, | |
1897 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
980ebd25 | 1898 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1899 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1900 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1901 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1902 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1903 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1904 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1905 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1906 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 1907 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
28d8909b | 1908 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
1da177e4 LT |
1909 | }; |
1910 | ||
1d00a4eb | 1911 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
1912 | { |
1913 | struct rtattr *xfrma[XFRMA_MAX]; | |
1914 | struct xfrm_link *link; | |
c702e804 | 1915 | int type, min_len; |
1da177e4 | 1916 | |
1da177e4 | 1917 | type = nlh->nlmsg_type; |
1da177e4 | 1918 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 1919 | return -EINVAL; |
1da177e4 LT |
1920 | |
1921 | type -= XFRM_MSG_BASE; | |
1922 | link = &xfrm_dispatch[type]; | |
1923 | ||
1924 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
1925 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
1926 | return -EPERM; | |
1da177e4 | 1927 | |
492b558b TG |
1928 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1929 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1930 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 1931 | if (link->dump == NULL) |
1d00a4eb | 1932 | return -EINVAL; |
88fc2c84 | 1933 | |
c702e804 | 1934 | return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); |
1da177e4 LT |
1935 | } |
1936 | ||
1937 | memset(xfrma, 0, sizeof(xfrma)); | |
1938 | ||
1939 | if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) | |
1d00a4eb | 1940 | return -EINVAL; |
1da177e4 LT |
1941 | |
1942 | if (nlh->nlmsg_len > min_len) { | |
1943 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
1944 | struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); | |
1945 | ||
1946 | while (RTA_OK(attr, attrlen)) { | |
1947 | unsigned short flavor = attr->rta_type; | |
1948 | if (flavor) { | |
1949 | if (flavor > XFRMA_MAX) | |
1d00a4eb | 1950 | return -EINVAL; |
1da177e4 LT |
1951 | xfrma[flavor - 1] = attr; |
1952 | } | |
1953 | attr = RTA_NEXT(attr, attrlen); | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | if (link->doit == NULL) | |
1d00a4eb | 1958 | return -EINVAL; |
1da177e4 | 1959 | |
1d00a4eb | 1960 | return link->doit(skb, nlh, xfrma); |
1da177e4 LT |
1961 | } |
1962 | ||
1da177e4 LT |
1963 | static void xfrm_netlink_rcv(struct sock *sk, int len) |
1964 | { | |
88fc2c84 | 1965 | unsigned int qlen = 0; |
2a0a6ebe | 1966 | |
1da177e4 | 1967 | do { |
4a3e2f71 | 1968 | mutex_lock(&xfrm_cfg_mutex); |
88fc2c84 | 1969 | netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); |
4a3e2f71 | 1970 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 | 1971 | |
2a0a6ebe | 1972 | } while (qlen); |
1da177e4 LT |
1973 | } |
1974 | ||
d51d081d | 1975 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1976 | { |
1977 | struct xfrm_user_expire *ue; | |
1978 | struct nlmsghdr *nlh; | |
27a884dc | 1979 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 1980 | |
d51d081d | 1981 | nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE, |
1da177e4 LT |
1982 | sizeof(*ue)); |
1983 | ue = NLMSG_DATA(nlh); | |
1984 | nlh->nlmsg_flags = 0; | |
1985 | ||
1986 | copy_to_user_state(x, &ue->state); | |
d51d081d | 1987 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 1988 | |
27a884dc | 1989 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
1990 | return skb->len; |
1991 | ||
1992 | nlmsg_failure: | |
dc5fc579 | 1993 | nlmsg_trim(skb, b); |
1da177e4 LT |
1994 | return -1; |
1995 | } | |
1996 | ||
26b15dad | 1997 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1998 | { |
1999 | struct sk_buff *skb; | |
ee57eef9 | 2000 | int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); |
1da177e4 | 2001 | |
ee57eef9 | 2002 | skb = alloc_skb(len, GFP_ATOMIC); |
1da177e4 LT |
2003 | if (skb == NULL) |
2004 | return -ENOMEM; | |
2005 | ||
d51d081d | 2006 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
2007 | BUG(); |
2008 | ||
ac6d439d PM |
2009 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
2010 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
2011 | } |
2012 | ||
d51d081d JHS |
2013 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
2014 | { | |
2015 | struct sk_buff *skb; | |
2016 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
2017 | ||
2018 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
2019 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
2020 | skb = alloc_skb(len, GFP_ATOMIC); | |
2021 | if (skb == NULL) | |
2022 | return -ENOMEM; | |
2023 | ||
2024 | if (build_aevent(skb, x, c) < 0) | |
2025 | BUG(); | |
2026 | ||
2027 | NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; | |
2028 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); | |
2029 | } | |
2030 | ||
26b15dad JHS |
2031 | static int xfrm_notify_sa_flush(struct km_event *c) |
2032 | { | |
2033 | struct xfrm_usersa_flush *p; | |
2034 | struct nlmsghdr *nlh; | |
2035 | struct sk_buff *skb; | |
27a884dc | 2036 | sk_buff_data_t b; |
26b15dad JHS |
2037 | int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); |
2038 | ||
2039 | skb = alloc_skb(len, GFP_ATOMIC); | |
2040 | if (skb == NULL) | |
2041 | return -ENOMEM; | |
2042 | b = skb->tail; | |
2043 | ||
2044 | nlh = NLMSG_PUT(skb, c->pid, c->seq, | |
2045 | XFRM_MSG_FLUSHSA, sizeof(*p)); | |
2046 | nlh->nlmsg_flags = 0; | |
2047 | ||
2048 | p = NLMSG_DATA(nlh); | |
bf08867f | 2049 | p->proto = c->data.proto; |
26b15dad JHS |
2050 | |
2051 | nlh->nlmsg_len = skb->tail - b; | |
2052 | ||
ac6d439d PM |
2053 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
2054 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
2055 | |
2056 | nlmsg_failure: | |
2057 | kfree_skb(skb); | |
2058 | return -1; | |
2059 | } | |
2060 | ||
b6f99a21 | 2061 | static inline int xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2062 | { |
0603eac0 | 2063 | int l = 0; |
26b15dad JHS |
2064 | if (x->aalg) |
2065 | l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); | |
2066 | if (x->ealg) | |
2067 | l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); | |
2068 | if (x->calg) | |
2069 | l += RTA_SPACE(sizeof(*x->calg)); | |
2070 | if (x->encap) | |
2071 | l += RTA_SPACE(sizeof(*x->encap)); | |
2072 | ||
2073 | return l; | |
2074 | } | |
2075 | ||
2076 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2077 | { | |
2078 | struct xfrm_usersa_info *p; | |
0603eac0 | 2079 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2080 | struct nlmsghdr *nlh; |
2081 | struct sk_buff *skb; | |
27a884dc | 2082 | sk_buff_data_t b; |
26b15dad | 2083 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2084 | int headlen; |
2085 | ||
2086 | headlen = sizeof(*p); | |
2087 | if (c->event == XFRM_MSG_DELSA) { | |
2088 | len += RTA_SPACE(headlen); | |
2089 | headlen = sizeof(*id); | |
2090 | } | |
2091 | len += NLMSG_SPACE(headlen); | |
26b15dad JHS |
2092 | |
2093 | skb = alloc_skb(len, GFP_ATOMIC); | |
2094 | if (skb == NULL) | |
2095 | return -ENOMEM; | |
2096 | b = skb->tail; | |
2097 | ||
0603eac0 | 2098 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
2099 | nlh->nlmsg_flags = 0; |
2100 | ||
2101 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
2102 | if (c->event == XFRM_MSG_DELSA) { |
2103 | id = NLMSG_DATA(nlh); | |
2104 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); | |
2105 | id->spi = x->id.spi; | |
2106 | id->family = x->props.family; | |
2107 | id->proto = x->id.proto; | |
2108 | ||
2109 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); | |
2110 | } | |
2111 | ||
26b15dad JHS |
2112 | copy_to_user_state(x, p); |
2113 | ||
2114 | if (x->aalg) | |
2115 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
2116 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
2117 | if (x->ealg) | |
2118 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
2119 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
2120 | if (x->calg) | |
2121 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
2122 | ||
2123 | if (x->encap) | |
2124 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
2125 | ||
2126 | nlh->nlmsg_len = skb->tail - b; | |
2127 | ||
ac6d439d PM |
2128 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
2129 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
2130 | |
2131 | nlmsg_failure: | |
2132 | rtattr_failure: | |
2133 | kfree_skb(skb); | |
2134 | return -1; | |
2135 | } | |
2136 | ||
2137 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2138 | { | |
2139 | ||
2140 | switch (c->event) { | |
f60f6b8f | 2141 | case XFRM_MSG_EXPIRE: |
26b15dad | 2142 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2143 | case XFRM_MSG_NEWAE: |
2144 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2145 | case XFRM_MSG_DELSA: |
2146 | case XFRM_MSG_UPDSA: | |
2147 | case XFRM_MSG_NEWSA: | |
26b15dad | 2148 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2149 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2150 | return xfrm_notify_sa_flush(c); |
2151 | default: | |
2152 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2153 | break; | |
2154 | } | |
2155 | ||
2156 | return 0; | |
2157 | ||
2158 | } | |
2159 | ||
1da177e4 LT |
2160 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2161 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2162 | int dir) | |
2163 | { | |
2164 | struct xfrm_user_acquire *ua; | |
2165 | struct nlmsghdr *nlh; | |
27a884dc | 2166 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
2167 | __u32 seq = xfrm_get_acqseq(); |
2168 | ||
2169 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, | |
2170 | sizeof(*ua)); | |
2171 | ua = NLMSG_DATA(nlh); | |
2172 | nlh->nlmsg_flags = 0; | |
2173 | ||
2174 | memcpy(&ua->id, &x->id, sizeof(ua->id)); | |
2175 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2176 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2177 | copy_to_user_policy(xp, &ua->policy, dir); | |
2178 | ua->aalgos = xt->aalgos; | |
2179 | ua->ealgos = xt->ealgos; | |
2180 | ua->calgos = xt->calgos; | |
2181 | ua->seq = x->km.seq = seq; | |
2182 | ||
2183 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2184 | goto nlmsg_failure; | |
0d681623 | 2185 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2186 | goto nlmsg_failure; |
1459bb36 | 2187 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2188 | goto nlmsg_failure; |
1da177e4 | 2189 | |
27a884dc | 2190 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
2191 | return skb->len; |
2192 | ||
2193 | nlmsg_failure: | |
dc5fc579 | 2194 | nlmsg_trim(skb, b); |
1da177e4 LT |
2195 | return -1; |
2196 | } | |
2197 | ||
2198 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2199 | struct xfrm_policy *xp, int dir) | |
2200 | { | |
2201 | struct sk_buff *skb; | |
2202 | size_t len; | |
2203 | ||
2204 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
2205 | len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); | |
661697f7 | 2206 | len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security)); |
785fd8b8 JHS |
2207 | #ifdef CONFIG_XFRM_SUB_POLICY |
2208 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2209 | #endif | |
1da177e4 LT |
2210 | skb = alloc_skb(len, GFP_ATOMIC); |
2211 | if (skb == NULL) | |
2212 | return -ENOMEM; | |
2213 | ||
2214 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2215 | BUG(); | |
2216 | ||
ac6d439d PM |
2217 | NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; |
2218 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); | |
1da177e4 LT |
2219 | } |
2220 | ||
2221 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2222 | * or more templates. | |
2223 | */ | |
cb969f07 | 2224 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2225 | u8 *data, int len, int *dir) |
2226 | { | |
2227 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
2228 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2229 | struct xfrm_policy *xp; | |
2230 | int nr; | |
2231 | ||
cb969f07 | 2232 | switch (sk->sk_family) { |
1da177e4 LT |
2233 | case AF_INET: |
2234 | if (opt != IP_XFRM_POLICY) { | |
2235 | *dir = -EOPNOTSUPP; | |
2236 | return NULL; | |
2237 | } | |
2238 | break; | |
2239 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2240 | case AF_INET6: | |
2241 | if (opt != IPV6_XFRM_POLICY) { | |
2242 | *dir = -EOPNOTSUPP; | |
2243 | return NULL; | |
2244 | } | |
2245 | break; | |
2246 | #endif | |
2247 | default: | |
2248 | *dir = -EINVAL; | |
2249 | return NULL; | |
2250 | } | |
2251 | ||
2252 | *dir = -EINVAL; | |
2253 | ||
2254 | if (len < sizeof(*p) || | |
2255 | verify_newpolicy_info(p)) | |
2256 | return NULL; | |
2257 | ||
2258 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2259 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2260 | return NULL; |
2261 | ||
a4f1bac6 HX |
2262 | if (p->dir > XFRM_POLICY_OUT) |
2263 | return NULL; | |
2264 | ||
1da177e4 LT |
2265 | xp = xfrm_policy_alloc(GFP_KERNEL); |
2266 | if (xp == NULL) { | |
2267 | *dir = -ENOBUFS; | |
2268 | return NULL; | |
2269 | } | |
2270 | ||
2271 | copy_from_user_policy(xp, p); | |
f7b6983f | 2272 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2273 | copy_templates(xp, ut, nr); |
2274 | ||
2275 | *dir = p->dir; | |
2276 | ||
2277 | return xp; | |
2278 | } | |
2279 | ||
2280 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, | |
d51d081d | 2281 | int dir, struct km_event *c) |
1da177e4 LT |
2282 | { |
2283 | struct xfrm_user_polexpire *upe; | |
2284 | struct nlmsghdr *nlh; | |
d51d081d | 2285 | int hard = c->data.hard; |
27a884dc | 2286 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 2287 | |
d51d081d | 2288 | nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); |
1da177e4 LT |
2289 | upe = NLMSG_DATA(nlh); |
2290 | nlh->nlmsg_flags = 0; | |
2291 | ||
2292 | copy_to_user_policy(xp, &upe->pol, dir); | |
2293 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2294 | goto nlmsg_failure; | |
df71837d TJ |
2295 | if (copy_to_user_sec_ctx(xp, skb)) |
2296 | goto nlmsg_failure; | |
1459bb36 | 2297 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2298 | goto nlmsg_failure; |
1da177e4 LT |
2299 | upe->hard = !!hard; |
2300 | ||
27a884dc | 2301 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
2302 | return skb->len; |
2303 | ||
2304 | nlmsg_failure: | |
dc5fc579 | 2305 | nlmsg_trim(skb, b); |
1da177e4 LT |
2306 | return -1; |
2307 | } | |
2308 | ||
26b15dad | 2309 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
2310 | { |
2311 | struct sk_buff *skb; | |
2312 | size_t len; | |
2313 | ||
2314 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
2315 | len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); | |
661697f7 | 2316 | len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security)); |
785fd8b8 JHS |
2317 | #ifdef CONFIG_XFRM_SUB_POLICY |
2318 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2319 | #endif | |
1da177e4 LT |
2320 | skb = alloc_skb(len, GFP_ATOMIC); |
2321 | if (skb == NULL) | |
2322 | return -ENOMEM; | |
2323 | ||
d51d081d | 2324 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2325 | BUG(); |
2326 | ||
ac6d439d PM |
2327 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
2328 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
2329 | } |
2330 | ||
26b15dad JHS |
2331 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2332 | { | |
2333 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 2334 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2335 | struct nlmsghdr *nlh; |
2336 | struct sk_buff *skb; | |
27a884dc | 2337 | sk_buff_data_t b; |
26b15dad | 2338 | int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2339 | int headlen; |
2340 | ||
2341 | headlen = sizeof(*p); | |
2342 | if (c->event == XFRM_MSG_DELPOLICY) { | |
2343 | len += RTA_SPACE(headlen); | |
2344 | headlen = sizeof(*id); | |
2345 | } | |
334f3d45 JHS |
2346 | #ifdef CONFIG_XFRM_SUB_POLICY |
2347 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2348 | #endif | |
0603eac0 | 2349 | len += NLMSG_SPACE(headlen); |
26b15dad JHS |
2350 | |
2351 | skb = alloc_skb(len, GFP_ATOMIC); | |
2352 | if (skb == NULL) | |
2353 | return -ENOMEM; | |
2354 | b = skb->tail; | |
2355 | ||
0603eac0 | 2356 | nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); |
26b15dad JHS |
2357 | |
2358 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
2359 | if (c->event == XFRM_MSG_DELPOLICY) { |
2360 | id = NLMSG_DATA(nlh); | |
2361 | memset(id, 0, sizeof(*id)); | |
2362 | id->dir = dir; | |
2363 | if (c->data.byid) | |
2364 | id->index = xp->index; | |
2365 | else | |
2366 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2367 | ||
2368 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); | |
2369 | } | |
26b15dad JHS |
2370 | |
2371 | nlh->nlmsg_flags = 0; | |
2372 | ||
2373 | copy_to_user_policy(xp, p, dir); | |
2374 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2375 | goto nlmsg_failure; | |
1459bb36 | 2376 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2377 | goto nlmsg_failure; |
26b15dad JHS |
2378 | |
2379 | nlh->nlmsg_len = skb->tail - b; | |
2380 | ||
ac6d439d PM |
2381 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
2382 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
2383 | |
2384 | nlmsg_failure: | |
0603eac0 | 2385 | rtattr_failure: |
26b15dad JHS |
2386 | kfree_skb(skb); |
2387 | return -1; | |
2388 | } | |
2389 | ||
2390 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2391 | { | |
2392 | struct nlmsghdr *nlh; | |
2393 | struct sk_buff *skb; | |
27a884dc | 2394 | sk_buff_data_t b; |
785fd8b8 | 2395 | int len = 0; |
f7b6983f | 2396 | #ifdef CONFIG_XFRM_SUB_POLICY |
785fd8b8 | 2397 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); |
f7b6983f | 2398 | #endif |
785fd8b8 | 2399 | len += NLMSG_LENGTH(0); |
26b15dad JHS |
2400 | |
2401 | skb = alloc_skb(len, GFP_ATOMIC); | |
2402 | if (skb == NULL) | |
2403 | return -ENOMEM; | |
2404 | b = skb->tail; | |
2405 | ||
2406 | ||
2407 | nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); | |
f7b6983f | 2408 | nlh->nlmsg_flags = 0; |
0c51f53c JHS |
2409 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2410 | goto nlmsg_failure; | |
26b15dad JHS |
2411 | |
2412 | nlh->nlmsg_len = skb->tail - b; | |
2413 | ||
ac6d439d PM |
2414 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
2415 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
2416 | |
2417 | nlmsg_failure: | |
2418 | kfree_skb(skb); | |
2419 | return -1; | |
2420 | } | |
2421 | ||
2422 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2423 | { | |
2424 | ||
2425 | switch (c->event) { | |
f60f6b8f HX |
2426 | case XFRM_MSG_NEWPOLICY: |
2427 | case XFRM_MSG_UPDPOLICY: | |
2428 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2429 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2430 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2431 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2432 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2433 | return xfrm_exp_policy_notify(xp, dir, c); |
2434 | default: | |
2435 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2436 | } | |
2437 | ||
2438 | return 0; | |
2439 | ||
2440 | } | |
2441 | ||
97a64b45 MN |
2442 | static int build_report(struct sk_buff *skb, u8 proto, |
2443 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2444 | { | |
2445 | struct xfrm_user_report *ur; | |
2446 | struct nlmsghdr *nlh; | |
27a884dc | 2447 | unsigned char *b = skb_tail_pointer(skb); |
97a64b45 MN |
2448 | |
2449 | nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur)); | |
2450 | ur = NLMSG_DATA(nlh); | |
2451 | nlh->nlmsg_flags = 0; | |
2452 | ||
2453 | ur->proto = proto; | |
2454 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2455 | ||
2456 | if (addr) | |
2457 | RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2458 | ||
27a884dc | 2459 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
97a64b45 MN |
2460 | return skb->len; |
2461 | ||
2462 | nlmsg_failure: | |
2463 | rtattr_failure: | |
dc5fc579 | 2464 | nlmsg_trim(skb, b); |
97a64b45 MN |
2465 | return -1; |
2466 | } | |
2467 | ||
2468 | static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, | |
2469 | xfrm_address_t *addr) | |
2470 | { | |
2471 | struct sk_buff *skb; | |
2472 | size_t len; | |
2473 | ||
2474 | len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report))); | |
2475 | skb = alloc_skb(len, GFP_ATOMIC); | |
2476 | if (skb == NULL) | |
2477 | return -ENOMEM; | |
2478 | ||
2479 | if (build_report(skb, proto, sel, addr) < 0) | |
2480 | BUG(); | |
2481 | ||
2482 | NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT; | |
2483 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); | |
2484 | } | |
2485 | ||
1da177e4 LT |
2486 | static struct xfrm_mgr netlink_mgr = { |
2487 | .id = "netlink", | |
2488 | .notify = xfrm_send_state_notify, | |
2489 | .acquire = xfrm_send_acquire, | |
2490 | .compile_policy = xfrm_compile_policy, | |
2491 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2492 | .report = xfrm_send_report, |
5c79de6e | 2493 | .migrate = xfrm_send_migrate, |
1da177e4 LT |
2494 | }; |
2495 | ||
2496 | static int __init xfrm_user_init(void) | |
2497 | { | |
be33690d PM |
2498 | struct sock *nlsk; |
2499 | ||
654b32c6 | 2500 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
1da177e4 | 2501 | |
be33690d | 2502 | nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2503 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2504 | if (nlsk == NULL) |
1da177e4 | 2505 | return -ENOMEM; |
be33690d | 2506 | rcu_assign_pointer(xfrm_nl, nlsk); |
1da177e4 LT |
2507 | |
2508 | xfrm_register_km(&netlink_mgr); | |
2509 | ||
2510 | return 0; | |
2511 | } | |
2512 | ||
2513 | static void __exit xfrm_user_exit(void) | |
2514 | { | |
be33690d PM |
2515 | struct sock *nlsk = xfrm_nl; |
2516 | ||
1da177e4 | 2517 | xfrm_unregister_km(&netlink_mgr); |
be33690d PM |
2518 | rcu_assign_pointer(xfrm_nl, NULL); |
2519 | synchronize_rcu(); | |
2520 | sock_release(nlsk->sk_socket); | |
1da177e4 LT |
2521 | } |
2522 | ||
2523 | module_init(xfrm_user_init); | |
2524 | module_exit(xfrm_user_exit); | |
2525 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2526 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2527 |