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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 | 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 | 324 | x->props.flags = p->flags; |
196b0036 HX |
325 | |
326 | /* | |
327 | * Set inner address family if the KM left it as zero. | |
328 | * See comment in validate_tmpl. | |
329 | */ | |
330 | if (!x->sel.family) | |
331 | x->sel.family = p->family; | |
1da177e4 LT |
332 | } |
333 | ||
d51d081d JHS |
334 | /* |
335 | * someday when pfkey also has support, we could have the code | |
336 | * somehow made shareable and move it to xfrm_state.c - JHS | |
337 | * | |
338 | */ | |
339 | static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma) | |
340 | { | |
341 | int err = - EINVAL; | |
342 | struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; | |
343 | struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; | |
344 | struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1]; | |
345 | struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1]; | |
346 | ||
347 | if (rp) { | |
348 | struct xfrm_replay_state *replay; | |
349 | if (RTA_PAYLOAD(rp) < sizeof(*replay)) | |
350 | goto error; | |
351 | replay = RTA_DATA(rp); | |
352 | memcpy(&x->replay, replay, sizeof(*replay)); | |
353 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
354 | } | |
355 | ||
356 | if (lt) { | |
357 | struct xfrm_lifetime_cur *ltime; | |
358 | if (RTA_PAYLOAD(lt) < sizeof(*ltime)) | |
359 | goto error; | |
360 | ltime = RTA_DATA(lt); | |
361 | x->curlft.bytes = ltime->bytes; | |
362 | x->curlft.packets = ltime->packets; | |
363 | x->curlft.add_time = ltime->add_time; | |
364 | x->curlft.use_time = ltime->use_time; | |
365 | } | |
366 | ||
367 | if (et) { | |
368 | if (RTA_PAYLOAD(et) < sizeof(u32)) | |
369 | goto error; | |
370 | x->replay_maxage = *(u32*)RTA_DATA(et); | |
371 | } | |
372 | ||
373 | if (rt) { | |
374 | if (RTA_PAYLOAD(rt) < sizeof(u32)) | |
375 | goto error; | |
376 | x->replay_maxdiff = *(u32*)RTA_DATA(rt); | |
377 | } | |
378 | ||
379 | return 0; | |
380 | error: | |
381 | return err; | |
382 | } | |
383 | ||
1da177e4 LT |
384 | static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, |
385 | struct rtattr **xfrma, | |
386 | int *errp) | |
387 | { | |
388 | struct xfrm_state *x = xfrm_state_alloc(); | |
389 | int err = -ENOMEM; | |
390 | ||
391 | if (!x) | |
392 | goto error_no_put; | |
393 | ||
394 | copy_from_user_state(x, p); | |
395 | ||
396 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, | |
397 | xfrm_aalg_get_byname, | |
398 | xfrma[XFRMA_ALG_AUTH-1]))) | |
399 | goto error; | |
400 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
401 | xfrm_ealg_get_byname, | |
402 | xfrma[XFRMA_ALG_CRYPT-1]))) | |
403 | goto error; | |
404 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
405 | xfrm_calg_get_byname, | |
406 | xfrma[XFRMA_ALG_COMP-1]))) | |
407 | goto error; | |
408 | if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) | |
409 | goto error; | |
060f02a3 NT |
410 | if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1]))) |
411 | goto error; | |
72cb6962 | 412 | err = xfrm_init_state(x); |
1da177e4 LT |
413 | if (err) |
414 | goto error; | |
415 | ||
df71837d TJ |
416 | if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) |
417 | goto error; | |
418 | ||
1da177e4 | 419 | x->km.seq = p->seq; |
d51d081d JHS |
420 | x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; |
421 | /* sysctl_xfrm_aevent_etime is in 100ms units */ | |
422 | x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; | |
423 | x->preplay.bitmap = 0; | |
424 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
425 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
426 | ||
427 | /* override default values from above */ | |
428 | ||
429 | err = xfrm_update_ae_params(x, (struct rtattr **)xfrma); | |
430 | if (err < 0) | |
431 | goto error; | |
1da177e4 LT |
432 | |
433 | return x; | |
434 | ||
435 | error: | |
436 | x->km.state = XFRM_STATE_DEAD; | |
437 | xfrm_state_put(x); | |
438 | error_no_put: | |
439 | *errp = err; | |
440 | return NULL; | |
441 | } | |
442 | ||
22e70050 CH |
443 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
444 | struct rtattr **xfrma) | |
1da177e4 LT |
445 | { |
446 | struct xfrm_usersa_info *p = NLMSG_DATA(nlh); | |
447 | struct xfrm_state *x; | |
448 | int err; | |
26b15dad | 449 | struct km_event c; |
1da177e4 | 450 | |
22e70050 | 451 | err = verify_newsa_info(p, xfrma); |
1da177e4 LT |
452 | if (err) |
453 | return err; | |
454 | ||
22e70050 | 455 | x = xfrm_state_construct(p, xfrma, &err); |
1da177e4 LT |
456 | if (!x) |
457 | return err; | |
458 | ||
26b15dad | 459 | xfrm_state_hold(x); |
1da177e4 LT |
460 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
461 | err = xfrm_state_add(x); | |
462 | else | |
463 | err = xfrm_state_update(x); | |
464 | ||
161a09e7 JL |
465 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
466 | AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x); | |
467 | ||
1da177e4 LT |
468 | if (err < 0) { |
469 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 470 | __xfrm_state_put(x); |
7d6dfe1f | 471 | goto out; |
1da177e4 LT |
472 | } |
473 | ||
26b15dad JHS |
474 | c.seq = nlh->nlmsg_seq; |
475 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 476 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
477 | |
478 | km_state_notify(x, &c); | |
7d6dfe1f | 479 | out: |
26b15dad | 480 | xfrm_state_put(x); |
1da177e4 LT |
481 | return err; |
482 | } | |
483 | ||
eb2971b6 MN |
484 | static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, |
485 | struct rtattr **xfrma, | |
486 | int *errp) | |
487 | { | |
488 | struct xfrm_state *x = NULL; | |
489 | int err; | |
490 | ||
491 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
492 | err = -ESRCH; | |
493 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
494 | } else { | |
495 | xfrm_address_t *saddr = NULL; | |
496 | ||
497 | err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr); | |
498 | if (err) | |
499 | goto out; | |
500 | ||
501 | if (!saddr) { | |
502 | err = -EINVAL; | |
503 | goto out; | |
504 | } | |
505 | ||
9abbffee | 506 | err = -ESRCH; |
eb2971b6 MN |
507 | x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, |
508 | p->family); | |
509 | } | |
510 | ||
511 | out: | |
512 | if (!x && errp) | |
513 | *errp = err; | |
514 | return x; | |
515 | } | |
516 | ||
22e70050 CH |
517 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
518 | struct rtattr **xfrma) | |
1da177e4 LT |
519 | { |
520 | struct xfrm_state *x; | |
eb2971b6 | 521 | int err = -ESRCH; |
26b15dad | 522 | struct km_event c; |
1da177e4 LT |
523 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); |
524 | ||
22e70050 | 525 | x = xfrm_user_state_lookup(p, xfrma, &err); |
1da177e4 | 526 | if (x == NULL) |
eb2971b6 | 527 | return err; |
1da177e4 | 528 | |
6f68dc37 | 529 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
530 | goto out; |
531 | ||
1da177e4 | 532 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
533 | err = -EPERM; |
534 | goto out; | |
1da177e4 LT |
535 | } |
536 | ||
26b15dad | 537 | err = xfrm_state_delete(x); |
161a09e7 | 538 | |
c8c05a8e CZ |
539 | if (err < 0) |
540 | goto out; | |
26b15dad JHS |
541 | |
542 | c.seq = nlh->nlmsg_seq; | |
543 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 544 | c.event = nlh->nlmsg_type; |
26b15dad | 545 | km_state_notify(x, &c); |
1da177e4 | 546 | |
c8c05a8e | 547 | out: |
16bec31d EP |
548 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
549 | AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x); | |
c8c05a8e | 550 | xfrm_state_put(x); |
26b15dad | 551 | return err; |
1da177e4 LT |
552 | } |
553 | ||
554 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
555 | { | |
556 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
557 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
558 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
559 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
560 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 561 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
562 | p->mode = x->props.mode; |
563 | p->replay_window = x->props.replay_window; | |
564 | p->reqid = x->props.reqid; | |
565 | p->family = x->props.family; | |
566 | p->flags = x->props.flags; | |
567 | p->seq = x->km.seq; | |
568 | } | |
569 | ||
570 | struct xfrm_dump_info { | |
571 | struct sk_buff *in_skb; | |
572 | struct sk_buff *out_skb; | |
573 | u32 nlmsg_seq; | |
574 | u16 nlmsg_flags; | |
575 | int start_idx; | |
576 | int this_idx; | |
577 | }; | |
578 | ||
579 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
580 | { | |
581 | struct xfrm_dump_info *sp = ptr; | |
582 | struct sk_buff *in_skb = sp->in_skb; | |
583 | struct sk_buff *skb = sp->out_skb; | |
584 | struct xfrm_usersa_info *p; | |
585 | struct nlmsghdr *nlh; | |
27a884dc | 586 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
587 | |
588 | if (sp->this_idx < sp->start_idx) | |
589 | goto out; | |
590 | ||
79b8b7f4 TG |
591 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
592 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
593 | if (nlh == NULL) | |
594 | return -EMSGSIZE; | |
1da177e4 LT |
595 | |
596 | p = NLMSG_DATA(nlh); | |
597 | copy_to_user_state(x, p); | |
598 | ||
599 | if (x->aalg) | |
600 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
601 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
602 | if (x->ealg) | |
603 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
604 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
605 | if (x->calg) | |
606 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
607 | ||
608 | if (x->encap) | |
609 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
610 | ||
df71837d TJ |
611 | if (x->security) { |
612 | int ctx_size = sizeof(struct xfrm_sec_ctx) + | |
613 | x->security->ctx_len; | |
614 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
615 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
616 | ||
617 | uctx->exttype = XFRMA_SEC_CTX; | |
618 | uctx->len = ctx_size; | |
619 | uctx->ctx_doi = x->security->ctx_doi; | |
620 | uctx->ctx_alg = x->security->ctx_alg; | |
621 | uctx->ctx_len = x->security->ctx_len; | |
622 | memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); | |
623 | } | |
060f02a3 NT |
624 | |
625 | if (x->coaddr) | |
626 | RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
627 | ||
9afaca05 MN |
628 | if (x->lastused) |
629 | RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused); | |
630 | ||
27a884dc | 631 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
632 | out: |
633 | sp->this_idx++; | |
634 | return 0; | |
635 | ||
1da177e4 | 636 | rtattr_failure: |
dc5fc579 | 637 | nlmsg_trim(skb, b); |
1da177e4 LT |
638 | return -1; |
639 | } | |
640 | ||
641 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) | |
642 | { | |
643 | struct xfrm_dump_info info; | |
644 | ||
645 | info.in_skb = cb->skb; | |
646 | info.out_skb = skb; | |
647 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
648 | info.nlmsg_flags = NLM_F_MULTI; | |
649 | info.this_idx = 0; | |
650 | info.start_idx = cb->args[0]; | |
dc00a525 | 651 | (void) xfrm_state_walk(0, dump_one_state, &info); |
1da177e4 LT |
652 | cb->args[0] = info.this_idx; |
653 | ||
654 | return skb->len; | |
655 | } | |
656 | ||
657 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
658 | struct xfrm_state *x, u32 seq) | |
659 | { | |
660 | struct xfrm_dump_info info; | |
661 | struct sk_buff *skb; | |
662 | ||
663 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); | |
664 | if (!skb) | |
665 | return ERR_PTR(-ENOMEM); | |
666 | ||
1da177e4 LT |
667 | info.in_skb = in_skb; |
668 | info.out_skb = skb; | |
669 | info.nlmsg_seq = seq; | |
670 | info.nlmsg_flags = 0; | |
671 | info.this_idx = info.start_idx = 0; | |
672 | ||
673 | if (dump_one_state(x, 0, &info)) { | |
674 | kfree_skb(skb); | |
675 | return NULL; | |
676 | } | |
677 | ||
678 | return skb; | |
679 | } | |
680 | ||
ecfd6b18 JHS |
681 | static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
682 | { | |
5a6d3416 JHS |
683 | struct xfrmk_spdinfo si; |
684 | struct xfrmu_spdinfo spc; | |
685 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
686 | struct nlmsghdr *nlh; |
687 | u32 *f; | |
688 | ||
689 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
690 | if (nlh == NULL) /* shouldnt really happen ... */ | |
691 | return -EMSGSIZE; | |
692 | ||
693 | f = nlmsg_data(nlh); | |
694 | *f = flags; | |
695 | xfrm_spd_getinfo(&si); | |
5a6d3416 JHS |
696 | spc.incnt = si.incnt; |
697 | spc.outcnt = si.outcnt; | |
698 | spc.fwdcnt = si.fwdcnt; | |
699 | spc.inscnt = si.inscnt; | |
700 | spc.outscnt = si.outscnt; | |
701 | spc.fwdscnt = si.fwdscnt; | |
702 | sph.spdhcnt = si.spdhcnt; | |
703 | sph.spdhmcnt = si.spdhmcnt; | |
704 | ||
705 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
706 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
707 | |
708 | return nlmsg_end(skb, nlh); | |
709 | ||
710 | nla_put_failure: | |
711 | nlmsg_cancel(skb, nlh); | |
712 | return -EMSGSIZE; | |
713 | } | |
714 | ||
715 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
716 | struct rtattr **xfrma) | |
717 | { | |
718 | struct sk_buff *r_skb; | |
719 | u32 *flags = NLMSG_DATA(nlh); | |
720 | u32 spid = NETLINK_CB(skb).pid; | |
721 | u32 seq = nlh->nlmsg_seq; | |
722 | int len = NLMSG_LENGTH(sizeof(u32)); | |
723 | ||
5a6d3416 JHS |
724 | len += RTA_SPACE(sizeof(struct xfrmu_spdinfo)); |
725 | len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo)); | |
ecfd6b18 JHS |
726 | |
727 | r_skb = alloc_skb(len, GFP_ATOMIC); | |
728 | if (r_skb == NULL) | |
729 | return -ENOMEM; | |
730 | ||
731 | if (build_spdinfo(r_skb, spid, seq, *flags) < 0) | |
732 | BUG(); | |
733 | ||
734 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
735 | } | |
736 | ||
28d8909b JHS |
737 | static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
738 | { | |
af11e316 JHS |
739 | struct xfrmk_sadinfo si; |
740 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
741 | struct nlmsghdr *nlh; |
742 | u32 *f; | |
743 | ||
744 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
745 | if (nlh == NULL) /* shouldnt really happen ... */ | |
746 | return -EMSGSIZE; | |
747 | ||
748 | f = nlmsg_data(nlh); | |
749 | *f = flags; | |
750 | xfrm_sad_getinfo(&si); | |
751 | ||
af11e316 JHS |
752 | sh.sadhmcnt = si.sadhmcnt; |
753 | sh.sadhcnt = si.sadhcnt; | |
754 | ||
755 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
756 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
757 | |
758 | return nlmsg_end(skb, nlh); | |
759 | ||
760 | nla_put_failure: | |
761 | nlmsg_cancel(skb, nlh); | |
762 | return -EMSGSIZE; | |
763 | } | |
764 | ||
765 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
766 | struct rtattr **xfrma) | |
767 | { | |
768 | struct sk_buff *r_skb; | |
769 | u32 *flags = NLMSG_DATA(nlh); | |
770 | u32 spid = NETLINK_CB(skb).pid; | |
771 | u32 seq = nlh->nlmsg_seq; | |
772 | int len = NLMSG_LENGTH(sizeof(u32)); | |
773 | ||
af11e316 JHS |
774 | len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo)); |
775 | len += RTA_SPACE(sizeof(u32)); | |
28d8909b JHS |
776 | |
777 | r_skb = alloc_skb(len, GFP_ATOMIC); | |
778 | ||
779 | if (r_skb == NULL) | |
780 | return -ENOMEM; | |
781 | ||
782 | if (build_sadinfo(r_skb, spid, seq, *flags) < 0) | |
783 | BUG(); | |
784 | ||
785 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
786 | } | |
787 | ||
22e70050 CH |
788 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
789 | struct rtattr **xfrma) | |
1da177e4 LT |
790 | { |
791 | struct xfrm_usersa_id *p = NLMSG_DATA(nlh); | |
792 | struct xfrm_state *x; | |
793 | struct sk_buff *resp_skb; | |
eb2971b6 | 794 | int err = -ESRCH; |
1da177e4 | 795 | |
22e70050 | 796 | x = xfrm_user_state_lookup(p, xfrma, &err); |
1da177e4 LT |
797 | if (x == NULL) |
798 | goto out_noput; | |
799 | ||
800 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
801 | if (IS_ERR(resp_skb)) { | |
802 | err = PTR_ERR(resp_skb); | |
803 | } else { | |
804 | err = netlink_unicast(xfrm_nl, resp_skb, | |
805 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
806 | } | |
807 | xfrm_state_put(x); | |
808 | out_noput: | |
809 | return err; | |
810 | } | |
811 | ||
812 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
813 | { | |
814 | switch (p->info.id.proto) { | |
815 | case IPPROTO_AH: | |
816 | case IPPROTO_ESP: | |
817 | break; | |
818 | ||
819 | case IPPROTO_COMP: | |
820 | /* IPCOMP spi is 16-bits. */ | |
821 | if (p->max >= 0x10000) | |
822 | return -EINVAL; | |
823 | break; | |
824 | ||
825 | default: | |
826 | return -EINVAL; | |
3ff50b79 | 827 | } |
1da177e4 LT |
828 | |
829 | if (p->min > p->max) | |
830 | return -EINVAL; | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
22e70050 CH |
835 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
836 | struct rtattr **xfrma) | |
1da177e4 LT |
837 | { |
838 | struct xfrm_state *x; | |
839 | struct xfrm_userspi_info *p; | |
840 | struct sk_buff *resp_skb; | |
841 | xfrm_address_t *daddr; | |
842 | int family; | |
843 | int err; | |
844 | ||
845 | p = NLMSG_DATA(nlh); | |
846 | err = verify_userspi_info(p); | |
847 | if (err) | |
848 | goto out_noput; | |
849 | ||
850 | family = p->info.family; | |
851 | daddr = &p->info.id.daddr; | |
852 | ||
853 | x = NULL; | |
854 | if (p->info.seq) { | |
855 | x = xfrm_find_acq_byseq(p->info.seq); | |
856 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
857 | xfrm_state_put(x); | |
858 | x = NULL; | |
859 | } | |
860 | } | |
861 | ||
862 | if (!x) | |
863 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
864 | p->info.id.proto, daddr, | |
865 | &p->info.saddr, 1, | |
866 | family); | |
867 | err = -ENOENT; | |
868 | if (x == NULL) | |
869 | goto out_noput; | |
870 | ||
871 | resp_skb = ERR_PTR(-ENOENT); | |
872 | ||
873 | spin_lock_bh(&x->lock); | |
874 | if (x->km.state != XFRM_STATE_DEAD) { | |
875 | xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); | |
876 | if (x->id.spi) | |
877 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
878 | } | |
879 | spin_unlock_bh(&x->lock); | |
880 | ||
881 | if (IS_ERR(resp_skb)) { | |
882 | err = PTR_ERR(resp_skb); | |
883 | goto out; | |
884 | } | |
885 | ||
886 | err = netlink_unicast(xfrm_nl, resp_skb, | |
887 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
888 | ||
889 | out: | |
890 | xfrm_state_put(x); | |
891 | out_noput: | |
892 | return err; | |
893 | } | |
894 | ||
b798a9ed | 895 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
896 | { |
897 | switch (dir) { | |
898 | case XFRM_POLICY_IN: | |
899 | case XFRM_POLICY_OUT: | |
900 | case XFRM_POLICY_FWD: | |
901 | break; | |
902 | ||
903 | default: | |
904 | return -EINVAL; | |
3ff50b79 | 905 | } |
1da177e4 LT |
906 | |
907 | return 0; | |
908 | } | |
909 | ||
b798a9ed | 910 | static int verify_policy_type(u8 type) |
f7b6983f MN |
911 | { |
912 | switch (type) { | |
913 | case XFRM_POLICY_TYPE_MAIN: | |
914 | #ifdef CONFIG_XFRM_SUB_POLICY | |
915 | case XFRM_POLICY_TYPE_SUB: | |
916 | #endif | |
917 | break; | |
918 | ||
919 | default: | |
920 | return -EINVAL; | |
3ff50b79 | 921 | } |
f7b6983f MN |
922 | |
923 | return 0; | |
924 | } | |
925 | ||
1da177e4 LT |
926 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
927 | { | |
928 | switch (p->share) { | |
929 | case XFRM_SHARE_ANY: | |
930 | case XFRM_SHARE_SESSION: | |
931 | case XFRM_SHARE_USER: | |
932 | case XFRM_SHARE_UNIQUE: | |
933 | break; | |
934 | ||
935 | default: | |
936 | return -EINVAL; | |
3ff50b79 | 937 | } |
1da177e4 LT |
938 | |
939 | switch (p->action) { | |
940 | case XFRM_POLICY_ALLOW: | |
941 | case XFRM_POLICY_BLOCK: | |
942 | break; | |
943 | ||
944 | default: | |
945 | return -EINVAL; | |
3ff50b79 | 946 | } |
1da177e4 LT |
947 | |
948 | switch (p->sel.family) { | |
949 | case AF_INET: | |
950 | break; | |
951 | ||
952 | case AF_INET6: | |
953 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
954 | break; | |
955 | #else | |
956 | return -EAFNOSUPPORT; | |
957 | #endif | |
958 | ||
959 | default: | |
960 | return -EINVAL; | |
3ff50b79 | 961 | } |
1da177e4 LT |
962 | |
963 | return verify_policy_dir(p->dir); | |
964 | } | |
965 | ||
df71837d TJ |
966 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) |
967 | { | |
968 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; | |
969 | struct xfrm_user_sec_ctx *uctx; | |
970 | ||
971 | if (!rt) | |
972 | return 0; | |
973 | ||
974 | uctx = RTA_DATA(rt); | |
975 | return security_xfrm_policy_alloc(pol, uctx); | |
976 | } | |
977 | ||
1da177e4 LT |
978 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
979 | int nr) | |
980 | { | |
981 | int i; | |
982 | ||
983 | xp->xfrm_nr = nr; | |
984 | for (i = 0; i < nr; i++, ut++) { | |
985 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
986 | ||
987 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
988 | memcpy(&t->saddr, &ut->saddr, | |
989 | sizeof(xfrm_address_t)); | |
990 | t->reqid = ut->reqid; | |
991 | t->mode = ut->mode; | |
992 | t->share = ut->share; | |
993 | t->optional = ut->optional; | |
994 | t->aalgos = ut->aalgos; | |
995 | t->ealgos = ut->ealgos; | |
996 | t->calgos = ut->calgos; | |
8511d01d | 997 | t->encap_family = ut->family; |
1da177e4 LT |
998 | } |
999 | } | |
1000 | ||
b4ad86bf DM |
1001 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1002 | { | |
1003 | int i; | |
1004 | ||
1005 | if (nr > XFRM_MAX_DEPTH) | |
1006 | return -EINVAL; | |
1007 | ||
1008 | for (i = 0; i < nr; i++) { | |
1009 | /* We never validated the ut->family value, so many | |
1010 | * applications simply leave it at zero. The check was | |
1011 | * never made and ut->family was ignored because all | |
1012 | * templates could be assumed to have the same family as | |
1013 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1014 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1015 | */ | |
1016 | if (!ut[i].family) | |
1017 | ut[i].family = family; | |
1018 | ||
1019 | switch (ut[i].family) { | |
1020 | case AF_INET: | |
1021 | break; | |
1022 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1023 | case AF_INET6: | |
1024 | break; | |
1025 | #endif | |
1026 | default: | |
1027 | return -EINVAL; | |
3ff50b79 | 1028 | } |
b4ad86bf DM |
1029 | } |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
1da177e4 LT |
1034 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) |
1035 | { | |
1036 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
1da177e4 LT |
1037 | |
1038 | if (!rt) { | |
1039 | pol->xfrm_nr = 0; | |
1040 | } else { | |
b4ad86bf DM |
1041 | struct xfrm_user_tmpl *utmpl = RTA_DATA(rt); |
1042 | int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); | |
1043 | int err; | |
1da177e4 | 1044 | |
b4ad86bf DM |
1045 | err = validate_tmpl(nr, utmpl, pol->family); |
1046 | if (err) | |
1047 | return err; | |
1da177e4 LT |
1048 | |
1049 | copy_templates(pol, RTA_DATA(rt), nr); | |
1050 | } | |
1051 | return 0; | |
1052 | } | |
1053 | ||
f7b6983f MN |
1054 | static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma) |
1055 | { | |
1056 | struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1]; | |
1057 | struct xfrm_userpolicy_type *upt; | |
b798a9ed | 1058 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1059 | int err; |
1060 | ||
1061 | if (rt) { | |
1062 | if (rt->rta_len < sizeof(*upt)) | |
1063 | return -EINVAL; | |
1064 | ||
1065 | upt = RTA_DATA(rt); | |
1066 | type = upt->type; | |
1067 | } | |
1068 | ||
1069 | err = verify_policy_type(type); | |
1070 | if (err) | |
1071 | return err; | |
1072 | ||
1073 | *tp = type; | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1da177e4 LT |
1077 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1078 | { | |
1079 | xp->priority = p->priority; | |
1080 | xp->index = p->index; | |
1081 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1082 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1083 | xp->action = p->action; | |
1084 | xp->flags = p->flags; | |
1085 | xp->family = p->sel.family; | |
1086 | /* XXX xp->share = p->share; */ | |
1087 | } | |
1088 | ||
1089 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1090 | { | |
1091 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1092 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1093 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1094 | p->priority = xp->priority; | |
1095 | p->index = xp->index; | |
1096 | p->sel.family = xp->family; | |
1097 | p->dir = dir; | |
1098 | p->action = xp->action; | |
1099 | p->flags = xp->flags; | |
1100 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1101 | } | |
1102 | ||
1103 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) | |
1104 | { | |
1105 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
1106 | int err; | |
1107 | ||
1108 | if (!xp) { | |
1109 | *errp = -ENOMEM; | |
1110 | return NULL; | |
1111 | } | |
1112 | ||
1113 | copy_from_user_policy(xp, p); | |
df71837d | 1114 | |
f7b6983f MN |
1115 | err = copy_from_user_policy_type(&xp->type, xfrma); |
1116 | if (err) | |
1117 | goto error; | |
1118 | ||
df71837d TJ |
1119 | if (!(err = copy_from_user_tmpl(xp, xfrma))) |
1120 | err = copy_from_user_sec_ctx(xp, xfrma); | |
f7b6983f MN |
1121 | if (err) |
1122 | goto error; | |
1da177e4 LT |
1123 | |
1124 | return xp; | |
f7b6983f MN |
1125 | error: |
1126 | *errp = err; | |
1127 | kfree(xp); | |
1128 | return NULL; | |
1da177e4 LT |
1129 | } |
1130 | ||
22e70050 CH |
1131 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1132 | struct rtattr **xfrma) | |
1da177e4 LT |
1133 | { |
1134 | struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); | |
1135 | struct xfrm_policy *xp; | |
26b15dad | 1136 | struct km_event c; |
1da177e4 LT |
1137 | int err; |
1138 | int excl; | |
1139 | ||
1140 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1141 | if (err) |
1142 | return err; | |
22e70050 | 1143 | err = verify_sec_ctx_len(xfrma); |
1da177e4 LT |
1144 | if (err) |
1145 | return err; | |
1146 | ||
22e70050 | 1147 | xp = xfrm_policy_construct(p, xfrma, &err); |
1da177e4 LT |
1148 | if (!xp) |
1149 | return err; | |
1150 | ||
26b15dad JHS |
1151 | /* shouldnt excl be based on nlh flags?? |
1152 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1153 | * in netlink excl is a flag and you wouldnt need | |
1154 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1155 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1156 | err = xfrm_policy_insert(p->dir, xp, excl); | |
161a09e7 JL |
1157 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1158 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1159 | ||
1da177e4 | 1160 | if (err) { |
5f8ac64b | 1161 | security_xfrm_policy_free(xp); |
1da177e4 LT |
1162 | kfree(xp); |
1163 | return err; | |
1164 | } | |
1165 | ||
f60f6b8f | 1166 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1167 | c.seq = nlh->nlmsg_seq; |
1168 | c.pid = nlh->nlmsg_pid; | |
1169 | km_policy_notify(xp, p->dir, &c); | |
1170 | ||
1da177e4 LT |
1171 | xfrm_pol_put(xp); |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1177 | { | |
1178 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1179 | int i; | |
1180 | ||
1181 | if (xp->xfrm_nr == 0) | |
1182 | return 0; | |
1183 | ||
1184 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1185 | struct xfrm_user_tmpl *up = &vec[i]; | |
1186 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1187 | ||
1188 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1189 | up->family = kp->encap_family; |
1da177e4 LT |
1190 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1191 | up->reqid = kp->reqid; | |
1192 | up->mode = kp->mode; | |
1193 | up->share = kp->share; | |
1194 | up->optional = kp->optional; | |
1195 | up->aalgos = kp->aalgos; | |
1196 | up->ealgos = kp->ealgos; | |
1197 | up->calgos = kp->calgos; | |
1198 | } | |
1199 | RTA_PUT(skb, XFRMA_TMPL, | |
1200 | (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), | |
1201 | vec); | |
1202 | ||
1203 | return 0; | |
1204 | ||
1205 | rtattr_failure: | |
1206 | return -1; | |
1207 | } | |
1208 | ||
0d681623 | 1209 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
df71837d | 1210 | { |
0d681623 SH |
1211 | int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len; |
1212 | struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); | |
1213 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1214 | ||
1215 | uctx->exttype = XFRMA_SEC_CTX; | |
1216 | uctx->len = ctx_size; | |
1217 | uctx->ctx_doi = s->ctx_doi; | |
1218 | uctx->ctx_alg = s->ctx_alg; | |
1219 | uctx->ctx_len = s->ctx_len; | |
1220 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
a716c119 | 1221 | return 0; |
df71837d | 1222 | |
0d681623 SH |
1223 | rtattr_failure: |
1224 | return -1; | |
1225 | } | |
1226 | ||
1227 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1228 | { | |
1229 | if (x->security) { | |
1230 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1231 | } |
1232 | return 0; | |
0d681623 | 1233 | } |
df71837d | 1234 | |
0d681623 SH |
1235 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1236 | { | |
1237 | if (xp->security) { | |
1238 | return copy_sec_ctx(xp->security, skb); | |
1239 | } | |
1240 | return 0; | |
df71837d TJ |
1241 | } |
1242 | ||
f7b6983f | 1243 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1244 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1245 | { |
1246 | struct xfrm_userpolicy_type upt; | |
1247 | ||
1248 | memset(&upt, 0, sizeof(upt)); | |
1459bb36 | 1249 | upt.type = type; |
f7b6983f MN |
1250 | |
1251 | RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); | |
1252 | ||
1253 | return 0; | |
1254 | ||
1255 | rtattr_failure: | |
1256 | return -1; | |
1257 | } | |
1258 | ||
1259 | #else | |
b798a9ed | 1260 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1261 | { |
1262 | return 0; | |
1263 | } | |
1264 | #endif | |
1265 | ||
1da177e4 LT |
1266 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1267 | { | |
1268 | struct xfrm_dump_info *sp = ptr; | |
1269 | struct xfrm_userpolicy_info *p; | |
1270 | struct sk_buff *in_skb = sp->in_skb; | |
1271 | struct sk_buff *skb = sp->out_skb; | |
1272 | struct nlmsghdr *nlh; | |
27a884dc | 1273 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
1274 | |
1275 | if (sp->this_idx < sp->start_idx) | |
1276 | goto out; | |
1277 | ||
79b8b7f4 TG |
1278 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1279 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1280 | if (nlh == NULL) | |
1281 | return -EMSGSIZE; | |
1da177e4 | 1282 | p = NLMSG_DATA(nlh); |
1da177e4 LT |
1283 | |
1284 | copy_to_user_policy(xp, p, dir); | |
1285 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1286 | goto nlmsg_failure; | |
df71837d TJ |
1287 | if (copy_to_user_sec_ctx(xp, skb)) |
1288 | goto nlmsg_failure; | |
1459bb36 | 1289 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1290 | goto nlmsg_failure; |
1da177e4 | 1291 | |
27a884dc | 1292 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
1293 | out: |
1294 | sp->this_idx++; | |
1295 | return 0; | |
1296 | ||
1297 | nlmsg_failure: | |
dc5fc579 | 1298 | nlmsg_trim(skb, b); |
1da177e4 LT |
1299 | return -1; |
1300 | } | |
1301 | ||
1302 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
1303 | { | |
1304 | struct xfrm_dump_info info; | |
1305 | ||
1306 | info.in_skb = cb->skb; | |
1307 | info.out_skb = skb; | |
1308 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1309 | info.nlmsg_flags = NLM_F_MULTI; | |
1310 | info.this_idx = 0; | |
1311 | info.start_idx = cb->args[0]; | |
f7b6983f MN |
1312 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); |
1313 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1314 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); | |
1315 | #endif | |
1da177e4 LT |
1316 | cb->args[0] = info.this_idx; |
1317 | ||
1318 | return skb->len; | |
1319 | } | |
1320 | ||
1321 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1322 | struct xfrm_policy *xp, | |
1323 | int dir, u32 seq) | |
1324 | { | |
1325 | struct xfrm_dump_info info; | |
1326 | struct sk_buff *skb; | |
1327 | ||
1328 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1329 | if (!skb) | |
1330 | return ERR_PTR(-ENOMEM); | |
1331 | ||
1da177e4 LT |
1332 | info.in_skb = in_skb; |
1333 | info.out_skb = skb; | |
1334 | info.nlmsg_seq = seq; | |
1335 | info.nlmsg_flags = 0; | |
1336 | info.this_idx = info.start_idx = 0; | |
1337 | ||
1338 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1339 | kfree_skb(skb); | |
1340 | return NULL; | |
1341 | } | |
1342 | ||
1343 | return skb; | |
1344 | } | |
1345 | ||
22e70050 CH |
1346 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1347 | struct rtattr **xfrma) | |
1da177e4 LT |
1348 | { |
1349 | struct xfrm_policy *xp; | |
1350 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1351 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1352 | int err; |
26b15dad | 1353 | struct km_event c; |
1da177e4 LT |
1354 | int delete; |
1355 | ||
1356 | p = NLMSG_DATA(nlh); | |
1357 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; | |
1358 | ||
22e70050 | 1359 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1360 | if (err) |
1361 | return err; | |
1362 | ||
1da177e4 LT |
1363 | err = verify_policy_dir(p->dir); |
1364 | if (err) | |
1365 | return err; | |
1366 | ||
1367 | if (p->index) | |
ef41aaa0 | 1368 | xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); |
df71837d | 1369 | else { |
22e70050 | 1370 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; |
df71837d TJ |
1371 | struct xfrm_policy tmp; |
1372 | ||
22e70050 | 1373 | err = verify_sec_ctx_len(xfrma); |
df71837d TJ |
1374 | if (err) |
1375 | return err; | |
1376 | ||
1377 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1378 | if (rt) { | |
1379 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1380 | ||
1381 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1382 | return err; | |
1383 | } | |
ef41aaa0 EP |
1384 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1385 | delete, &err); | |
df71837d TJ |
1386 | security_xfrm_policy_free(&tmp); |
1387 | } | |
1da177e4 LT |
1388 | if (xp == NULL) |
1389 | return -ENOENT; | |
1390 | ||
1391 | if (!delete) { | |
1392 | struct sk_buff *resp_skb; | |
1393 | ||
1394 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1395 | if (IS_ERR(resp_skb)) { | |
1396 | err = PTR_ERR(resp_skb); | |
1397 | } else { | |
1398 | err = netlink_unicast(xfrm_nl, resp_skb, | |
1399 | NETLINK_CB(skb).pid, | |
1400 | MSG_DONTWAIT); | |
1401 | } | |
26b15dad | 1402 | } else { |
13fcfbb0 DM |
1403 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1404 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1405 | ||
1406 | if (err != 0) | |
c8c05a8e | 1407 | goto out; |
13fcfbb0 | 1408 | |
e7443892 | 1409 | c.data.byid = p->index; |
f60f6b8f | 1410 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1411 | c.seq = nlh->nlmsg_seq; |
1412 | c.pid = nlh->nlmsg_pid; | |
1413 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1414 | } |
1415 | ||
c8c05a8e | 1416 | out: |
ef41aaa0 | 1417 | xfrm_pol_put(xp); |
1da177e4 LT |
1418 | return err; |
1419 | } | |
1420 | ||
22e70050 CH |
1421 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
1422 | struct rtattr **xfrma) | |
1da177e4 | 1423 | { |
26b15dad | 1424 | struct km_event c; |
1da177e4 | 1425 | struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); |
161a09e7 | 1426 | struct xfrm_audit audit_info; |
4aa2e62c | 1427 | int err; |
1da177e4 | 1428 | |
161a09e7 JL |
1429 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1430 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1431 | err = xfrm_state_flush(p->proto, &audit_info); |
1432 | if (err) | |
1433 | return err; | |
bf08867f | 1434 | c.data.proto = p->proto; |
f60f6b8f | 1435 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1436 | c.seq = nlh->nlmsg_seq; |
1437 | c.pid = nlh->nlmsg_pid; | |
1438 | km_state_notify(NULL, &c); | |
1439 | ||
1da177e4 LT |
1440 | return 0; |
1441 | } | |
1442 | ||
d51d081d JHS |
1443 | |
1444 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1445 | { | |
1446 | struct xfrm_aevent_id *id; | |
1447 | struct nlmsghdr *nlh; | |
1448 | struct xfrm_lifetime_cur ltime; | |
27a884dc | 1449 | unsigned char *b = skb_tail_pointer(skb); |
d51d081d | 1450 | |
79b8b7f4 TG |
1451 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1452 | if (nlh == NULL) | |
1453 | return -EMSGSIZE; | |
d51d081d | 1454 | id = NLMSG_DATA(nlh); |
d51d081d | 1455 | |
2b5f6dcc | 1456 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1457 | id->sa_id.spi = x->id.spi; |
1458 | id->sa_id.family = x->props.family; | |
1459 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1460 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1461 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1462 | id->flags = c->data.aevent; |
1463 | ||
1464 | RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); | |
1465 | ||
1466 | ltime.bytes = x->curlft.bytes; | |
1467 | ltime.packets = x->curlft.packets; | |
1468 | ltime.add_time = x->curlft.add_time; | |
1469 | ltime.use_time = x->curlft.use_time; | |
1470 | ||
1471 | RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); | |
1472 | ||
1473 | if (id->flags&XFRM_AE_RTHR) { | |
1474 | RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); | |
1475 | } | |
1476 | ||
1477 | if (id->flags&XFRM_AE_ETHR) { | |
1478 | u32 etimer = x->replay_maxage*10/HZ; | |
1479 | RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); | |
1480 | } | |
1481 | ||
27a884dc | 1482 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
d51d081d JHS |
1483 | return skb->len; |
1484 | ||
1485 | rtattr_failure: | |
dc5fc579 | 1486 | nlmsg_trim(skb, b); |
d51d081d JHS |
1487 | return -1; |
1488 | } | |
1489 | ||
22e70050 CH |
1490 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
1491 | struct rtattr **xfrma) | |
d51d081d JHS |
1492 | { |
1493 | struct xfrm_state *x; | |
1494 | struct sk_buff *r_skb; | |
1495 | int err; | |
1496 | struct km_event c; | |
1497 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1498 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
1499 | struct xfrm_usersa_id *id = &p->sa_id; | |
1500 | ||
1501 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
1502 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
1503 | ||
1504 | if (p->flags&XFRM_AE_RTHR) | |
1505 | len+=RTA_SPACE(sizeof(u32)); | |
1506 | ||
1507 | if (p->flags&XFRM_AE_ETHR) | |
1508 | len+=RTA_SPACE(sizeof(u32)); | |
1509 | ||
1510 | r_skb = alloc_skb(len, GFP_ATOMIC); | |
1511 | if (r_skb == NULL) | |
1512 | return -ENOMEM; | |
1513 | ||
1514 | x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); | |
1515 | if (x == NULL) { | |
b08d5840 | 1516 | kfree_skb(r_skb); |
d51d081d JHS |
1517 | return -ESRCH; |
1518 | } | |
1519 | ||
1520 | /* | |
1521 | * XXX: is this lock really needed - none of the other | |
1522 | * gets lock (the concern is things getting updated | |
1523 | * while we are still reading) - jhs | |
1524 | */ | |
1525 | spin_lock_bh(&x->lock); | |
1526 | c.data.aevent = p->flags; | |
1527 | c.seq = nlh->nlmsg_seq; | |
1528 | c.pid = nlh->nlmsg_pid; | |
1529 | ||
1530 | if (build_aevent(r_skb, x, &c) < 0) | |
1531 | BUG(); | |
1532 | err = netlink_unicast(xfrm_nl, r_skb, | |
1533 | NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
1534 | spin_unlock_bh(&x->lock); | |
1535 | xfrm_state_put(x); | |
1536 | return err; | |
1537 | } | |
1538 | ||
22e70050 CH |
1539 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
1540 | struct rtattr **xfrma) | |
d51d081d JHS |
1541 | { |
1542 | struct xfrm_state *x; | |
1543 | struct km_event c; | |
1544 | int err = - EINVAL; | |
1545 | struct xfrm_aevent_id *p = NLMSG_DATA(nlh); | |
1546 | struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; | |
1547 | struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; | |
1548 | ||
1549 | if (!lt && !rp) | |
1550 | return err; | |
1551 | ||
1552 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1553 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1554 | return err; | |
1555 | ||
1556 | x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
1557 | if (x == NULL) | |
1558 | return -ESRCH; | |
1559 | ||
1560 | if (x->km.state != XFRM_STATE_VALID) | |
1561 | goto out; | |
1562 | ||
1563 | spin_lock_bh(&x->lock); | |
22e70050 | 1564 | err = xfrm_update_ae_params(x, xfrma); |
d51d081d JHS |
1565 | spin_unlock_bh(&x->lock); |
1566 | if (err < 0) | |
1567 | goto out; | |
1568 | ||
1569 | c.event = nlh->nlmsg_type; | |
1570 | c.seq = nlh->nlmsg_seq; | |
1571 | c.pid = nlh->nlmsg_pid; | |
1572 | c.data.aevent = XFRM_AE_CU; | |
1573 | km_state_notify(x, &c); | |
1574 | err = 0; | |
1575 | out: | |
1576 | xfrm_state_put(x); | |
1577 | return err; | |
1578 | } | |
1579 | ||
22e70050 CH |
1580 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
1581 | struct rtattr **xfrma) | |
1da177e4 | 1582 | { |
f7b6983f | 1583 | struct km_event c; |
b798a9ed | 1584 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1585 | int err; |
161a09e7 | 1586 | struct xfrm_audit audit_info; |
f7b6983f | 1587 | |
22e70050 | 1588 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1589 | if (err) |
1590 | return err; | |
26b15dad | 1591 | |
161a09e7 JL |
1592 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1593 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1594 | err = xfrm_policy_flush(type, &audit_info); |
1595 | if (err) | |
1596 | return err; | |
f7b6983f | 1597 | c.data.type = type; |
f60f6b8f | 1598 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1599 | c.seq = nlh->nlmsg_seq; |
1600 | c.pid = nlh->nlmsg_pid; | |
1601 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1602 | return 0; |
1603 | } | |
1604 | ||
22e70050 CH |
1605 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1606 | struct rtattr **xfrma) | |
6c5c8ca7 JHS |
1607 | { |
1608 | struct xfrm_policy *xp; | |
1609 | struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); | |
1610 | struct xfrm_userpolicy_info *p = &up->pol; | |
b798a9ed | 1611 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1612 | int err = -ENOENT; |
1613 | ||
22e70050 | 1614 | err = copy_from_user_policy_type(&type, xfrma); |
f7b6983f MN |
1615 | if (err) |
1616 | return err; | |
1617 | ||
6c5c8ca7 | 1618 | if (p->index) |
ef41aaa0 | 1619 | xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1620 | else { |
22e70050 | 1621 | struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; |
6c5c8ca7 JHS |
1622 | struct xfrm_policy tmp; |
1623 | ||
22e70050 | 1624 | err = verify_sec_ctx_len(xfrma); |
6c5c8ca7 JHS |
1625 | if (err) |
1626 | return err; | |
1627 | ||
1628 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1629 | if (rt) { | |
1630 | struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); | |
1631 | ||
1632 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1633 | return err; | |
1634 | } | |
ef41aaa0 EP |
1635 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1636 | 0, &err); | |
6c5c8ca7 JHS |
1637 | security_xfrm_policy_free(&tmp); |
1638 | } | |
1639 | ||
1640 | if (xp == NULL) | |
ef41aaa0 EP |
1641 | return -ENOENT; |
1642 | read_lock(&xp->lock); | |
6c5c8ca7 JHS |
1643 | if (xp->dead) { |
1644 | read_unlock(&xp->lock); | |
1645 | goto out; | |
1646 | } | |
1647 | ||
1648 | read_unlock(&xp->lock); | |
1649 | err = 0; | |
1650 | if (up->hard) { | |
1651 | xfrm_policy_delete(xp, p->dir); | |
161a09e7 JL |
1652 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1653 | AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL); | |
1654 | ||
6c5c8ca7 JHS |
1655 | } else { |
1656 | // reset the timers here? | |
1657 | printk("Dont know what to do with soft policy expire\n"); | |
1658 | } | |
1659 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1660 | ||
1661 | out: | |
1662 | xfrm_pol_put(xp); | |
1663 | return err; | |
1664 | } | |
1665 | ||
22e70050 CH |
1666 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1667 | struct rtattr **xfrma) | |
53bc6b4d JHS |
1668 | { |
1669 | struct xfrm_state *x; | |
1670 | int err; | |
1671 | struct xfrm_user_expire *ue = NLMSG_DATA(nlh); | |
1672 | struct xfrm_usersa_info *p = &ue->state; | |
1673 | ||
1674 | x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); | |
53bc6b4d | 1675 | |
3a765aa5 | 1676 | err = -ENOENT; |
53bc6b4d JHS |
1677 | if (x == NULL) |
1678 | return err; | |
1679 | ||
53bc6b4d | 1680 | spin_lock_bh(&x->lock); |
3a765aa5 | 1681 | err = -EINVAL; |
53bc6b4d JHS |
1682 | if (x->km.state != XFRM_STATE_VALID) |
1683 | goto out; | |
1684 | km_state_expired(x, ue->hard, current->pid); | |
1685 | ||
161a09e7 | 1686 | if (ue->hard) { |
53bc6b4d | 1687 | __xfrm_state_delete(x); |
161a09e7 JL |
1688 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1689 | AUDIT_MAC_IPSEC_DELSA, 1, NULL, x); | |
1690 | } | |
3a765aa5 | 1691 | err = 0; |
53bc6b4d JHS |
1692 | out: |
1693 | spin_unlock_bh(&x->lock); | |
1694 | xfrm_state_put(x); | |
1695 | return err; | |
1696 | } | |
1697 | ||
22e70050 CH |
1698 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
1699 | struct rtattr **xfrma) | |
980ebd25 JHS |
1700 | { |
1701 | struct xfrm_policy *xp; | |
1702 | struct xfrm_user_tmpl *ut; | |
1703 | int i; | |
1704 | struct rtattr *rt = xfrma[XFRMA_TMPL-1]; | |
1705 | ||
1706 | struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); | |
1707 | struct xfrm_state *x = xfrm_state_alloc(); | |
1708 | int err = -ENOMEM; | |
1709 | ||
1710 | if (!x) | |
1711 | return err; | |
1712 | ||
1713 | err = verify_newpolicy_info(&ua->policy); | |
1714 | if (err) { | |
1715 | printk("BAD policy passed\n"); | |
1716 | kfree(x); | |
1717 | return err; | |
1718 | } | |
1719 | ||
1720 | /* build an XP */ | |
b4ad86bf DM |
1721 | xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); |
1722 | if (!xp) { | |
980ebd25 JHS |
1723 | kfree(x); |
1724 | return err; | |
1725 | } | |
1726 | ||
1727 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1728 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1729 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1730 | ||
1731 | ut = RTA_DATA(rt); | |
1732 | /* extract the templates and for each call km_key */ | |
1733 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1734 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1735 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1736 | x->props.mode = t->mode; | |
1737 | x->props.reqid = t->reqid; | |
1738 | x->props.family = ut->family; | |
1739 | t->aalgos = ua->aalgos; | |
1740 | t->ealgos = ua->ealgos; | |
1741 | t->calgos = ua->calgos; | |
1742 | err = km_query(x, t, xp); | |
1743 | ||
1744 | } | |
1745 | ||
1746 | kfree(x); | |
1747 | kfree(xp); | |
1748 | ||
1749 | return 0; | |
1750 | } | |
1751 | ||
5c79de6e SS |
1752 | #ifdef CONFIG_XFRM_MIGRATE |
1753 | static int verify_user_migrate(struct rtattr **xfrma) | |
1754 | { | |
1755 | struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; | |
1756 | struct xfrm_user_migrate *um; | |
1757 | ||
1758 | if (!rt) | |
1759 | return -EINVAL; | |
1760 | ||
1761 | if ((rt->rta_len - sizeof(*rt)) < sizeof(*um)) | |
1762 | return -EINVAL; | |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | static int copy_from_user_migrate(struct xfrm_migrate *ma, | |
1768 | struct rtattr **xfrma, int *num) | |
1769 | { | |
1770 | struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; | |
1771 | struct xfrm_user_migrate *um; | |
1772 | int i, num_migrate; | |
1773 | ||
1774 | um = RTA_DATA(rt); | |
1775 | num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um); | |
1776 | ||
1777 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1778 | return -EINVAL; | |
1779 | ||
1780 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1781 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1782 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1783 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1784 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1785 | ||
1786 | ma->proto = um->proto; | |
1787 | ma->mode = um->mode; | |
1788 | ma->reqid = um->reqid; | |
1789 | ||
1790 | ma->old_family = um->old_family; | |
1791 | ma->new_family = um->new_family; | |
1792 | } | |
1793 | ||
1794 | *num = i; | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
1799 | struct rtattr **xfrma) | |
1800 | { | |
1801 | struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh); | |
1802 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; | |
1803 | u8 type; | |
1804 | int err; | |
1805 | int n = 0; | |
1806 | ||
1807 | err = verify_user_migrate((struct rtattr **)xfrma); | |
1808 | if (err) | |
1809 | return err; | |
1810 | ||
1811 | err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma); | |
1812 | if (err) | |
1813 | return err; | |
1814 | ||
1815 | err = copy_from_user_migrate((struct xfrm_migrate *)m, | |
1816 | (struct rtattr **)xfrma, &n); | |
1817 | if (err) | |
1818 | return err; | |
1819 | ||
1820 | if (!n) | |
1821 | return 0; | |
1822 | ||
1823 | xfrm_migrate(&pi->sel, pi->dir, type, m, n); | |
1824 | ||
1825 | return 0; | |
1826 | } | |
1827 | #else | |
1828 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
1829 | struct rtattr **xfrma) | |
1830 | { | |
1831 | return -ENOPROTOOPT; | |
1832 | } | |
1833 | #endif | |
1834 | ||
1835 | #ifdef CONFIG_XFRM_MIGRATE | |
1836 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1837 | { | |
1838 | struct xfrm_user_migrate um; | |
1839 | ||
1840 | memset(&um, 0, sizeof(um)); | |
1841 | um.proto = m->proto; | |
1842 | um.mode = m->mode; | |
1843 | um.reqid = m->reqid; | |
1844 | um.old_family = m->old_family; | |
1845 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1846 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1847 | um.new_family = m->new_family; | |
1848 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1849 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1850 | ||
1851 | RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um); | |
1852 | return 0; | |
1853 | ||
1854 | rtattr_failure: | |
1855 | return -1; | |
1856 | } | |
1857 | ||
1858 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, | |
1859 | int num_migrate, struct xfrm_selector *sel, | |
1860 | u8 dir, u8 type) | |
1861 | { | |
1862 | struct xfrm_migrate *mp; | |
1863 | struct xfrm_userpolicy_id *pol_id; | |
1864 | struct nlmsghdr *nlh; | |
27a884dc | 1865 | unsigned char *b = skb_tail_pointer(skb); |
5c79de6e SS |
1866 | int i; |
1867 | ||
79b8b7f4 TG |
1868 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
1869 | if (nlh == NULL) | |
1870 | return -EMSGSIZE; | |
5c79de6e | 1871 | pol_id = NLMSG_DATA(nlh); |
5c79de6e SS |
1872 | |
1873 | /* copy data from selector, dir, and type to the pol_id */ | |
1874 | memset(pol_id, 0, sizeof(*pol_id)); | |
1875 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1876 | pol_id->dir = dir; | |
1877 | ||
1878 | if (copy_to_user_policy_type(type, skb) < 0) | |
1879 | goto nlmsg_failure; | |
1880 | ||
1881 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1882 | if (copy_to_user_migrate(mp, skb) < 0) | |
1883 | goto nlmsg_failure; | |
1884 | } | |
1885 | ||
27a884dc | 1886 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
5c79de6e SS |
1887 | return skb->len; |
1888 | nlmsg_failure: | |
dc5fc579 | 1889 | nlmsg_trim(skb, b); |
5c79de6e SS |
1890 | return -1; |
1891 | } | |
1892 | ||
1893 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1894 | struct xfrm_migrate *m, int num_migrate) | |
1895 | { | |
1896 | struct sk_buff *skb; | |
1897 | size_t len; | |
1898 | ||
1899 | len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate); | |
1900 | len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id)); | |
1901 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1902 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
1903 | #endif | |
1904 | skb = alloc_skb(len, GFP_ATOMIC); | |
1905 | if (skb == NULL) | |
1906 | return -ENOMEM; | |
1907 | ||
1908 | /* build migrate */ | |
1909 | if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) | |
1910 | BUG(); | |
1911 | ||
1912 | NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE; | |
1913 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, | |
1914 | GFP_ATOMIC); | |
1915 | } | |
1916 | #else | |
1917 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1918 | struct xfrm_migrate *m, int num_migrate) | |
1919 | { | |
1920 | return -ENOPROTOOPT; | |
1921 | } | |
1922 | #endif | |
d51d081d | 1923 | |
492b558b TG |
1924 | #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) |
1925 | ||
1926 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1927 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1928 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1929 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1930 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1931 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1932 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1933 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1934 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1935 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b TG |
1936 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
1937 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
6c5c8ca7 | 1938 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b TG |
1939 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
1940 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), | |
d51d081d JHS |
1941 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1942 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 1943 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 1944 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
566ec034 | 1945 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)), |
ecfd6b18 | 1946 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)), |
1da177e4 LT |
1947 | }; |
1948 | ||
492b558b TG |
1949 | #undef XMSGSIZE |
1950 | ||
1da177e4 | 1951 | static struct xfrm_link { |
22e70050 | 1952 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **); |
1da177e4 | 1953 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
492b558b TG |
1954 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1955 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1956 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1957 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1958 | .dump = xfrm_dump_sa }, | |
1959 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1960 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1961 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1962 | .dump = xfrm_dump_policy }, | |
1963 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
980ebd25 | 1964 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1965 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1966 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1967 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1968 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1969 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1970 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1971 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1972 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 1973 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 1974 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 1975 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
1976 | }; |
1977 | ||
1d00a4eb | 1978 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
1979 | { |
1980 | struct rtattr *xfrma[XFRMA_MAX]; | |
1981 | struct xfrm_link *link; | |
c702e804 | 1982 | int type, min_len; |
1da177e4 | 1983 | |
1da177e4 | 1984 | type = nlh->nlmsg_type; |
1da177e4 | 1985 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 1986 | return -EINVAL; |
1da177e4 LT |
1987 | |
1988 | type -= XFRM_MSG_BASE; | |
1989 | link = &xfrm_dispatch[type]; | |
1990 | ||
1991 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
1992 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
1993 | return -EPERM; | |
1da177e4 | 1994 | |
492b558b TG |
1995 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1996 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1997 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 1998 | if (link->dump == NULL) |
1d00a4eb | 1999 | return -EINVAL; |
88fc2c84 | 2000 | |
c702e804 | 2001 | return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); |
1da177e4 LT |
2002 | } |
2003 | ||
2004 | memset(xfrma, 0, sizeof(xfrma)); | |
2005 | ||
2006 | if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) | |
1d00a4eb | 2007 | return -EINVAL; |
1da177e4 LT |
2008 | |
2009 | if (nlh->nlmsg_len > min_len) { | |
2010 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
2011 | struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); | |
2012 | ||
2013 | while (RTA_OK(attr, attrlen)) { | |
2014 | unsigned short flavor = attr->rta_type; | |
2015 | if (flavor) { | |
2016 | if (flavor > XFRMA_MAX) | |
1d00a4eb | 2017 | return -EINVAL; |
1da177e4 LT |
2018 | xfrma[flavor - 1] = attr; |
2019 | } | |
2020 | attr = RTA_NEXT(attr, attrlen); | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | if (link->doit == NULL) | |
1d00a4eb | 2025 | return -EINVAL; |
1da177e4 | 2026 | |
1d00a4eb | 2027 | return link->doit(skb, nlh, xfrma); |
1da177e4 LT |
2028 | } |
2029 | ||
1da177e4 LT |
2030 | static void xfrm_netlink_rcv(struct sock *sk, int len) |
2031 | { | |
88fc2c84 | 2032 | unsigned int qlen = 0; |
2a0a6ebe | 2033 | |
1da177e4 | 2034 | do { |
4a3e2f71 | 2035 | mutex_lock(&xfrm_cfg_mutex); |
88fc2c84 | 2036 | netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); |
4a3e2f71 | 2037 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 | 2038 | |
2a0a6ebe | 2039 | } while (qlen); |
1da177e4 LT |
2040 | } |
2041 | ||
d51d081d | 2042 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
2043 | { |
2044 | struct xfrm_user_expire *ue; | |
2045 | struct nlmsghdr *nlh; | |
27a884dc | 2046 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 2047 | |
79b8b7f4 TG |
2048 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2049 | if (nlh == NULL) | |
2050 | return -EMSGSIZE; | |
1da177e4 | 2051 | ue = NLMSG_DATA(nlh); |
1da177e4 LT |
2052 | |
2053 | copy_to_user_state(x, &ue->state); | |
d51d081d | 2054 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2055 | |
27a884dc | 2056 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 | 2057 | return skb->len; |
1da177e4 LT |
2058 | } |
2059 | ||
26b15dad | 2060 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
2061 | { |
2062 | struct sk_buff *skb; | |
ee57eef9 | 2063 | int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); |
1da177e4 | 2064 | |
ee57eef9 | 2065 | skb = alloc_skb(len, GFP_ATOMIC); |
1da177e4 LT |
2066 | if (skb == NULL) |
2067 | return -ENOMEM; | |
2068 | ||
d51d081d | 2069 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
2070 | BUG(); |
2071 | ||
ac6d439d PM |
2072 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
2073 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
2074 | } |
2075 | ||
d51d081d JHS |
2076 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
2077 | { | |
2078 | struct sk_buff *skb; | |
2079 | int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); | |
2080 | ||
2081 | len += RTA_SPACE(sizeof(struct xfrm_replay_state)); | |
2082 | len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); | |
2083 | skb = alloc_skb(len, GFP_ATOMIC); | |
2084 | if (skb == NULL) | |
2085 | return -ENOMEM; | |
2086 | ||
2087 | if (build_aevent(skb, x, c) < 0) | |
2088 | BUG(); | |
2089 | ||
2090 | NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; | |
2091 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); | |
2092 | } | |
2093 | ||
26b15dad JHS |
2094 | static int xfrm_notify_sa_flush(struct km_event *c) |
2095 | { | |
2096 | struct xfrm_usersa_flush *p; | |
2097 | struct nlmsghdr *nlh; | |
2098 | struct sk_buff *skb; | |
27a884dc | 2099 | sk_buff_data_t b; |
26b15dad JHS |
2100 | int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); |
2101 | ||
2102 | skb = alloc_skb(len, GFP_ATOMIC); | |
2103 | if (skb == NULL) | |
2104 | return -ENOMEM; | |
2105 | b = skb->tail; | |
2106 | ||
79b8b7f4 TG |
2107 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2108 | if (nlh == NULL) { | |
2109 | kfree_skb(skb); | |
2110 | return -EMSGSIZE; | |
2111 | } | |
26b15dad JHS |
2112 | |
2113 | p = NLMSG_DATA(nlh); | |
bf08867f | 2114 | p->proto = c->data.proto; |
26b15dad JHS |
2115 | |
2116 | nlh->nlmsg_len = skb->tail - b; | |
2117 | ||
ac6d439d PM |
2118 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
2119 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
2120 | } |
2121 | ||
b6f99a21 | 2122 | static inline int xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2123 | { |
0603eac0 | 2124 | int l = 0; |
26b15dad JHS |
2125 | if (x->aalg) |
2126 | l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); | |
2127 | if (x->ealg) | |
2128 | l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); | |
2129 | if (x->calg) | |
2130 | l += RTA_SPACE(sizeof(*x->calg)); | |
2131 | if (x->encap) | |
2132 | l += RTA_SPACE(sizeof(*x->encap)); | |
2133 | ||
2134 | return l; | |
2135 | } | |
2136 | ||
2137 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2138 | { | |
2139 | struct xfrm_usersa_info *p; | |
0603eac0 | 2140 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2141 | struct nlmsghdr *nlh; |
2142 | struct sk_buff *skb; | |
27a884dc | 2143 | sk_buff_data_t b; |
26b15dad | 2144 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2145 | int headlen; |
2146 | ||
2147 | headlen = sizeof(*p); | |
2148 | if (c->event == XFRM_MSG_DELSA) { | |
2149 | len += RTA_SPACE(headlen); | |
2150 | headlen = sizeof(*id); | |
2151 | } | |
2152 | len += NLMSG_SPACE(headlen); | |
26b15dad JHS |
2153 | |
2154 | skb = alloc_skb(len, GFP_ATOMIC); | |
2155 | if (skb == NULL) | |
2156 | return -ENOMEM; | |
2157 | b = skb->tail; | |
2158 | ||
79b8b7f4 TG |
2159 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2160 | if (nlh == NULL) | |
2161 | goto nlmsg_failure; | |
26b15dad JHS |
2162 | |
2163 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
2164 | if (c->event == XFRM_MSG_DELSA) { |
2165 | id = NLMSG_DATA(nlh); | |
2166 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); | |
2167 | id->spi = x->id.spi; | |
2168 | id->family = x->props.family; | |
2169 | id->proto = x->id.proto; | |
2170 | ||
2171 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); | |
2172 | } | |
2173 | ||
26b15dad JHS |
2174 | copy_to_user_state(x, p); |
2175 | ||
2176 | if (x->aalg) | |
2177 | RTA_PUT(skb, XFRMA_ALG_AUTH, | |
2178 | sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); | |
2179 | if (x->ealg) | |
2180 | RTA_PUT(skb, XFRMA_ALG_CRYPT, | |
2181 | sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); | |
2182 | if (x->calg) | |
2183 | RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
2184 | ||
2185 | if (x->encap) | |
2186 | RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
2187 | ||
2188 | nlh->nlmsg_len = skb->tail - b; | |
2189 | ||
ac6d439d PM |
2190 | NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; |
2191 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); | |
26b15dad JHS |
2192 | |
2193 | nlmsg_failure: | |
2194 | rtattr_failure: | |
2195 | kfree_skb(skb); | |
2196 | return -1; | |
2197 | } | |
2198 | ||
2199 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2200 | { | |
2201 | ||
2202 | switch (c->event) { | |
f60f6b8f | 2203 | case XFRM_MSG_EXPIRE: |
26b15dad | 2204 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2205 | case XFRM_MSG_NEWAE: |
2206 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2207 | case XFRM_MSG_DELSA: |
2208 | case XFRM_MSG_UPDSA: | |
2209 | case XFRM_MSG_NEWSA: | |
26b15dad | 2210 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2211 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2212 | return xfrm_notify_sa_flush(c); |
2213 | default: | |
2214 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2215 | break; | |
2216 | } | |
2217 | ||
2218 | return 0; | |
2219 | ||
2220 | } | |
2221 | ||
1da177e4 LT |
2222 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2223 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2224 | int dir) | |
2225 | { | |
2226 | struct xfrm_user_acquire *ua; | |
2227 | struct nlmsghdr *nlh; | |
27a884dc | 2228 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 LT |
2229 | __u32 seq = xfrm_get_acqseq(); |
2230 | ||
79b8b7f4 TG |
2231 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2232 | if (nlh == NULL) | |
2233 | return -EMSGSIZE; | |
1da177e4 | 2234 | ua = NLMSG_DATA(nlh); |
1da177e4 LT |
2235 | |
2236 | memcpy(&ua->id, &x->id, sizeof(ua->id)); | |
2237 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2238 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2239 | copy_to_user_policy(xp, &ua->policy, dir); | |
2240 | ua->aalgos = xt->aalgos; | |
2241 | ua->ealgos = xt->ealgos; | |
2242 | ua->calgos = xt->calgos; | |
2243 | ua->seq = x->km.seq = seq; | |
2244 | ||
2245 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2246 | goto nlmsg_failure; | |
0d681623 | 2247 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2248 | goto nlmsg_failure; |
1459bb36 | 2249 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2250 | goto nlmsg_failure; |
1da177e4 | 2251 | |
27a884dc | 2252 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
2253 | return skb->len; |
2254 | ||
2255 | nlmsg_failure: | |
dc5fc579 | 2256 | nlmsg_trim(skb, b); |
1da177e4 LT |
2257 | return -1; |
2258 | } | |
2259 | ||
2260 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2261 | struct xfrm_policy *xp, int dir) | |
2262 | { | |
2263 | struct sk_buff *skb; | |
2264 | size_t len; | |
2265 | ||
2266 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
2267 | len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); | |
661697f7 | 2268 | len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security)); |
785fd8b8 JHS |
2269 | #ifdef CONFIG_XFRM_SUB_POLICY |
2270 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2271 | #endif | |
1da177e4 LT |
2272 | skb = alloc_skb(len, GFP_ATOMIC); |
2273 | if (skb == NULL) | |
2274 | return -ENOMEM; | |
2275 | ||
2276 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2277 | BUG(); | |
2278 | ||
ac6d439d PM |
2279 | NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; |
2280 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); | |
1da177e4 LT |
2281 | } |
2282 | ||
2283 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2284 | * or more templates. | |
2285 | */ | |
cb969f07 | 2286 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2287 | u8 *data, int len, int *dir) |
2288 | { | |
2289 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
2290 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2291 | struct xfrm_policy *xp; | |
2292 | int nr; | |
2293 | ||
cb969f07 | 2294 | switch (sk->sk_family) { |
1da177e4 LT |
2295 | case AF_INET: |
2296 | if (opt != IP_XFRM_POLICY) { | |
2297 | *dir = -EOPNOTSUPP; | |
2298 | return NULL; | |
2299 | } | |
2300 | break; | |
2301 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2302 | case AF_INET6: | |
2303 | if (opt != IPV6_XFRM_POLICY) { | |
2304 | *dir = -EOPNOTSUPP; | |
2305 | return NULL; | |
2306 | } | |
2307 | break; | |
2308 | #endif | |
2309 | default: | |
2310 | *dir = -EINVAL; | |
2311 | return NULL; | |
2312 | } | |
2313 | ||
2314 | *dir = -EINVAL; | |
2315 | ||
2316 | if (len < sizeof(*p) || | |
2317 | verify_newpolicy_info(p)) | |
2318 | return NULL; | |
2319 | ||
2320 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2321 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2322 | return NULL; |
2323 | ||
a4f1bac6 HX |
2324 | if (p->dir > XFRM_POLICY_OUT) |
2325 | return NULL; | |
2326 | ||
1da177e4 LT |
2327 | xp = xfrm_policy_alloc(GFP_KERNEL); |
2328 | if (xp == NULL) { | |
2329 | *dir = -ENOBUFS; | |
2330 | return NULL; | |
2331 | } | |
2332 | ||
2333 | copy_from_user_policy(xp, p); | |
f7b6983f | 2334 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2335 | copy_templates(xp, ut, nr); |
2336 | ||
2337 | *dir = p->dir; | |
2338 | ||
2339 | return xp; | |
2340 | } | |
2341 | ||
2342 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, | |
d51d081d | 2343 | int dir, struct km_event *c) |
1da177e4 LT |
2344 | { |
2345 | struct xfrm_user_polexpire *upe; | |
2346 | struct nlmsghdr *nlh; | |
d51d081d | 2347 | int hard = c->data.hard; |
27a884dc | 2348 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 2349 | |
79b8b7f4 TG |
2350 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2351 | if (nlh == NULL) | |
2352 | return -EMSGSIZE; | |
1da177e4 | 2353 | upe = NLMSG_DATA(nlh); |
1da177e4 LT |
2354 | |
2355 | copy_to_user_policy(xp, &upe->pol, dir); | |
2356 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2357 | goto nlmsg_failure; | |
df71837d TJ |
2358 | if (copy_to_user_sec_ctx(xp, skb)) |
2359 | goto nlmsg_failure; | |
1459bb36 | 2360 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2361 | goto nlmsg_failure; |
1da177e4 LT |
2362 | upe->hard = !!hard; |
2363 | ||
27a884dc | 2364 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
2365 | return skb->len; |
2366 | ||
2367 | nlmsg_failure: | |
dc5fc579 | 2368 | nlmsg_trim(skb, b); |
1da177e4 LT |
2369 | return -1; |
2370 | } | |
2371 | ||
26b15dad | 2372 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
2373 | { |
2374 | struct sk_buff *skb; | |
2375 | size_t len; | |
2376 | ||
2377 | len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); | |
2378 | len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); | |
661697f7 | 2379 | len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security)); |
785fd8b8 JHS |
2380 | #ifdef CONFIG_XFRM_SUB_POLICY |
2381 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2382 | #endif | |
1da177e4 LT |
2383 | skb = alloc_skb(len, GFP_ATOMIC); |
2384 | if (skb == NULL) | |
2385 | return -ENOMEM; | |
2386 | ||
d51d081d | 2387 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2388 | BUG(); |
2389 | ||
ac6d439d PM |
2390 | NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; |
2391 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); | |
1da177e4 LT |
2392 | } |
2393 | ||
26b15dad JHS |
2394 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2395 | { | |
2396 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 2397 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2398 | struct nlmsghdr *nlh; |
2399 | struct sk_buff *skb; | |
27a884dc | 2400 | sk_buff_data_t b; |
26b15dad | 2401 | int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2402 | int headlen; |
2403 | ||
2404 | headlen = sizeof(*p); | |
2405 | if (c->event == XFRM_MSG_DELPOLICY) { | |
2406 | len += RTA_SPACE(headlen); | |
2407 | headlen = sizeof(*id); | |
2408 | } | |
334f3d45 JHS |
2409 | #ifdef CONFIG_XFRM_SUB_POLICY |
2410 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); | |
2411 | #endif | |
0603eac0 | 2412 | len += NLMSG_SPACE(headlen); |
26b15dad JHS |
2413 | |
2414 | skb = alloc_skb(len, GFP_ATOMIC); | |
2415 | if (skb == NULL) | |
2416 | return -ENOMEM; | |
2417 | b = skb->tail; | |
2418 | ||
79b8b7f4 TG |
2419 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2420 | if (nlh == NULL) | |
2421 | goto nlmsg_failure; | |
26b15dad JHS |
2422 | |
2423 | p = NLMSG_DATA(nlh); | |
0603eac0 HX |
2424 | if (c->event == XFRM_MSG_DELPOLICY) { |
2425 | id = NLMSG_DATA(nlh); | |
2426 | memset(id, 0, sizeof(*id)); | |
2427 | id->dir = dir; | |
2428 | if (c->data.byid) | |
2429 | id->index = xp->index; | |
2430 | else | |
2431 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2432 | ||
2433 | p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); | |
2434 | } | |
26b15dad | 2435 | |
26b15dad JHS |
2436 | copy_to_user_policy(xp, p, dir); |
2437 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2438 | goto nlmsg_failure; | |
1459bb36 | 2439 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2440 | goto nlmsg_failure; |
26b15dad JHS |
2441 | |
2442 | nlh->nlmsg_len = skb->tail - b; | |
2443 | ||
ac6d439d PM |
2444 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
2445 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
2446 | |
2447 | nlmsg_failure: | |
0603eac0 | 2448 | rtattr_failure: |
26b15dad JHS |
2449 | kfree_skb(skb); |
2450 | return -1; | |
2451 | } | |
2452 | ||
2453 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2454 | { | |
2455 | struct nlmsghdr *nlh; | |
2456 | struct sk_buff *skb; | |
27a884dc | 2457 | sk_buff_data_t b; |
785fd8b8 | 2458 | int len = 0; |
f7b6983f | 2459 | #ifdef CONFIG_XFRM_SUB_POLICY |
785fd8b8 | 2460 | len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); |
f7b6983f | 2461 | #endif |
785fd8b8 | 2462 | len += NLMSG_LENGTH(0); |
26b15dad JHS |
2463 | |
2464 | skb = alloc_skb(len, GFP_ATOMIC); | |
2465 | if (skb == NULL) | |
2466 | return -ENOMEM; | |
2467 | b = skb->tail; | |
2468 | ||
2469 | ||
79b8b7f4 TG |
2470 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2471 | if (nlh == NULL) | |
2472 | goto nlmsg_failure; | |
0c51f53c JHS |
2473 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2474 | goto nlmsg_failure; | |
26b15dad JHS |
2475 | |
2476 | nlh->nlmsg_len = skb->tail - b; | |
2477 | ||
ac6d439d PM |
2478 | NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; |
2479 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); | |
26b15dad JHS |
2480 | |
2481 | nlmsg_failure: | |
2482 | kfree_skb(skb); | |
2483 | return -1; | |
2484 | } | |
2485 | ||
2486 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2487 | { | |
2488 | ||
2489 | switch (c->event) { | |
f60f6b8f HX |
2490 | case XFRM_MSG_NEWPOLICY: |
2491 | case XFRM_MSG_UPDPOLICY: | |
2492 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2493 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2494 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2495 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2496 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2497 | return xfrm_exp_policy_notify(xp, dir, c); |
2498 | default: | |
2499 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2500 | } | |
2501 | ||
2502 | return 0; | |
2503 | ||
2504 | } | |
2505 | ||
97a64b45 MN |
2506 | static int build_report(struct sk_buff *skb, u8 proto, |
2507 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2508 | { | |
2509 | struct xfrm_user_report *ur; | |
2510 | struct nlmsghdr *nlh; | |
27a884dc | 2511 | unsigned char *b = skb_tail_pointer(skb); |
97a64b45 | 2512 | |
79b8b7f4 TG |
2513 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2514 | if (nlh == NULL) | |
2515 | return -EMSGSIZE; | |
97a64b45 | 2516 | ur = NLMSG_DATA(nlh); |
97a64b45 MN |
2517 | |
2518 | ur->proto = proto; | |
2519 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2520 | ||
2521 | if (addr) | |
2522 | RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2523 | ||
27a884dc | 2524 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
97a64b45 MN |
2525 | return skb->len; |
2526 | ||
97a64b45 | 2527 | rtattr_failure: |
dc5fc579 | 2528 | nlmsg_trim(skb, b); |
97a64b45 MN |
2529 | return -1; |
2530 | } | |
2531 | ||
2532 | static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, | |
2533 | xfrm_address_t *addr) | |
2534 | { | |
2535 | struct sk_buff *skb; | |
2536 | size_t len; | |
2537 | ||
2538 | len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report))); | |
2539 | skb = alloc_skb(len, GFP_ATOMIC); | |
2540 | if (skb == NULL) | |
2541 | return -ENOMEM; | |
2542 | ||
2543 | if (build_report(skb, proto, sel, addr) < 0) | |
2544 | BUG(); | |
2545 | ||
2546 | NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT; | |
2547 | return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); | |
2548 | } | |
2549 | ||
1da177e4 LT |
2550 | static struct xfrm_mgr netlink_mgr = { |
2551 | .id = "netlink", | |
2552 | .notify = xfrm_send_state_notify, | |
2553 | .acquire = xfrm_send_acquire, | |
2554 | .compile_policy = xfrm_compile_policy, | |
2555 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2556 | .report = xfrm_send_report, |
5c79de6e | 2557 | .migrate = xfrm_send_migrate, |
1da177e4 LT |
2558 | }; |
2559 | ||
2560 | static int __init xfrm_user_init(void) | |
2561 | { | |
be33690d PM |
2562 | struct sock *nlsk; |
2563 | ||
654b32c6 | 2564 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
1da177e4 | 2565 | |
be33690d | 2566 | nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2567 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2568 | if (nlsk == NULL) |
1da177e4 | 2569 | return -ENOMEM; |
be33690d | 2570 | rcu_assign_pointer(xfrm_nl, nlsk); |
1da177e4 LT |
2571 | |
2572 | xfrm_register_km(&netlink_mgr); | |
2573 | ||
2574 | return 0; | |
2575 | } | |
2576 | ||
2577 | static void __exit xfrm_user_exit(void) | |
2578 | { | |
be33690d PM |
2579 | struct sock *nlsk = xfrm_nl; |
2580 | ||
1da177e4 | 2581 | xfrm_unregister_km(&netlink_mgr); |
be33690d PM |
2582 | rcu_assign_pointer(xfrm_nl, NULL); |
2583 | synchronize_rcu(); | |
2584 | sock_release(nlsk->sk_socket); | |
1da177e4 LT |
2585 | } |
2586 | ||
2587 | module_init(xfrm_user_init); | |
2588 | module_exit(xfrm_user_exit); | |
2589 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2590 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2591 |