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/pfkeyv2.h> |
23 | #include <linux/ipsec.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/security.h> | |
26 | #include <net/sock.h> | |
27 | #include <net/xfrm.h> | |
88fc2c84 | 28 | #include <net/netlink.h> |
1da177e4 | 29 | #include <asm/uaccess.h> |
e23c7194 MN |
30 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
31 | #include <linux/in6.h> | |
32 | #endif | |
1da177e4 | 33 | |
1a6509d9 HX |
34 | static inline int aead_len(struct xfrm_algo_aead *alg) |
35 | { | |
36 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
37 | } | |
38 | ||
5424f32e | 39 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 40 | { |
5424f32e | 41 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
42 | struct xfrm_algo *algp; |
43 | ||
44 | if (!rt) | |
45 | return 0; | |
46 | ||
5424f32e | 47 | algp = nla_data(rt); |
0f99be0d | 48 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
49 | return -EINVAL; |
50 | ||
1da177e4 LT |
51 | switch (type) { |
52 | case XFRMA_ALG_AUTH: | |
53 | if (!algp->alg_key_len && | |
54 | strcmp(algp->alg_name, "digest_null") != 0) | |
55 | return -EINVAL; | |
56 | break; | |
57 | ||
58 | case XFRMA_ALG_CRYPT: | |
59 | if (!algp->alg_key_len && | |
60 | strcmp(algp->alg_name, "cipher_null") != 0) | |
61 | return -EINVAL; | |
62 | break; | |
63 | ||
64 | case XFRMA_ALG_COMP: | |
65 | /* Zero length keys are legal. */ | |
66 | break; | |
67 | ||
68 | default: | |
69 | return -EINVAL; | |
3ff50b79 | 70 | } |
1da177e4 LT |
71 | |
72 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
73 | return 0; | |
74 | } | |
75 | ||
1a6509d9 HX |
76 | static int verify_aead(struct nlattr **attrs) |
77 | { | |
78 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
79 | struct xfrm_algo_aead *algp; | |
80 | ||
81 | if (!rt) | |
82 | return 0; | |
83 | ||
84 | algp = nla_data(rt); | |
85 | if (nla_len(rt) < aead_len(algp)) | |
86 | return -EINVAL; | |
87 | ||
88 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
89 | return 0; | |
90 | } | |
91 | ||
5424f32e | 92 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
93 | xfrm_address_t **addrp) |
94 | { | |
5424f32e | 95 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 96 | |
cf5cb79f | 97 | if (rt && addrp) |
5424f32e | 98 | *addrp = nla_data(rt); |
eb2971b6 | 99 | } |
df71837d | 100 | |
5424f32e | 101 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 102 | { |
5424f32e | 103 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 104 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
105 | |
106 | if (!rt) | |
107 | return 0; | |
108 | ||
5424f32e | 109 | uctx = nla_data(rt); |
cf5cb79f | 110 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
111 | return -EINVAL; |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
116 | ||
1da177e4 | 117 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 118 | struct nlattr **attrs) |
1da177e4 LT |
119 | { |
120 | int err; | |
121 | ||
122 | err = -EINVAL; | |
123 | switch (p->family) { | |
124 | case AF_INET: | |
125 | break; | |
126 | ||
127 | case AF_INET6: | |
128 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
129 | break; | |
130 | #else | |
131 | err = -EAFNOSUPPORT; | |
132 | goto out; | |
133 | #endif | |
134 | ||
135 | default: | |
136 | goto out; | |
3ff50b79 | 137 | } |
1da177e4 LT |
138 | |
139 | err = -EINVAL; | |
140 | switch (p->id.proto) { | |
141 | case IPPROTO_AH: | |
35a7aa08 | 142 | if (!attrs[XFRMA_ALG_AUTH] || |
1a6509d9 | 143 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
144 | attrs[XFRMA_ALG_CRYPT] || |
145 | attrs[XFRMA_ALG_COMP]) | |
1da177e4 LT |
146 | goto out; |
147 | break; | |
148 | ||
149 | case IPPROTO_ESP: | |
1a6509d9 HX |
150 | if (attrs[XFRMA_ALG_COMP]) |
151 | goto out; | |
152 | if (!attrs[XFRMA_ALG_AUTH] && | |
153 | !attrs[XFRMA_ALG_CRYPT] && | |
154 | !attrs[XFRMA_ALG_AEAD]) | |
155 | goto out; | |
156 | if ((attrs[XFRMA_ALG_AUTH] || | |
157 | attrs[XFRMA_ALG_CRYPT]) && | |
158 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 LT |
159 | goto out; |
160 | break; | |
161 | ||
162 | case IPPROTO_COMP: | |
35a7aa08 | 163 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 164 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
165 | attrs[XFRMA_ALG_AUTH] || |
166 | attrs[XFRMA_ALG_CRYPT]) | |
1da177e4 LT |
167 | goto out; |
168 | break; | |
169 | ||
e23c7194 MN |
170 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
171 | case IPPROTO_DSTOPTS: | |
172 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
173 | if (attrs[XFRMA_ALG_COMP] || |
174 | attrs[XFRMA_ALG_AUTH] || | |
1a6509d9 | 175 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
176 | attrs[XFRMA_ALG_CRYPT] || |
177 | attrs[XFRMA_ENCAP] || | |
178 | attrs[XFRMA_SEC_CTX] || | |
179 | !attrs[XFRMA_COADDR]) | |
e23c7194 MN |
180 | goto out; |
181 | break; | |
182 | #endif | |
183 | ||
1da177e4 LT |
184 | default: |
185 | goto out; | |
3ff50b79 | 186 | } |
1da177e4 | 187 | |
1a6509d9 HX |
188 | if ((err = verify_aead(attrs))) |
189 | goto out; | |
35a7aa08 | 190 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 191 | goto out; |
35a7aa08 | 192 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 193 | goto out; |
35a7aa08 | 194 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 195 | goto out; |
35a7aa08 | 196 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 197 | goto out; |
1da177e4 LT |
198 | |
199 | err = -EINVAL; | |
200 | switch (p->mode) { | |
7e49e6de MN |
201 | case XFRM_MODE_TRANSPORT: |
202 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 203 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 204 | case XFRM_MODE_BEET: |
1da177e4 LT |
205 | break; |
206 | ||
207 | default: | |
208 | goto out; | |
3ff50b79 | 209 | } |
1da177e4 LT |
210 | |
211 | err = 0; | |
212 | ||
213 | out: | |
214 | return err; | |
215 | } | |
216 | ||
217 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
218 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
5424f32e | 219 | struct nlattr *rta) |
1da177e4 | 220 | { |
1da177e4 LT |
221 | struct xfrm_algo *p, *ualg; |
222 | struct xfrm_algo_desc *algo; | |
223 | ||
224 | if (!rta) | |
225 | return 0; | |
226 | ||
5424f32e | 227 | ualg = nla_data(rta); |
1da177e4 LT |
228 | |
229 | algo = get_byname(ualg->alg_name, 1); | |
230 | if (!algo) | |
231 | return -ENOSYS; | |
232 | *props = algo->desc.sadb_alg_id; | |
233 | ||
0f99be0d | 234 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
235 | if (!p) |
236 | return -ENOMEM; | |
237 | ||
04ff1260 | 238 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
239 | *algpp = p; |
240 | return 0; | |
241 | } | |
242 | ||
1a6509d9 HX |
243 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
244 | struct nlattr *rta) | |
245 | { | |
246 | struct xfrm_algo_aead *p, *ualg; | |
247 | struct xfrm_algo_desc *algo; | |
248 | ||
249 | if (!rta) | |
250 | return 0; | |
251 | ||
252 | ualg = nla_data(rta); | |
253 | ||
254 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
255 | if (!algo) | |
256 | return -ENOSYS; | |
257 | *props = algo->desc.sadb_alg_id; | |
258 | ||
259 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
260 | if (!p) | |
261 | return -ENOMEM; | |
262 | ||
263 | strcpy(p->alg_name, algo->name); | |
264 | *algpp = p; | |
265 | return 0; | |
266 | } | |
267 | ||
661697f7 | 268 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 269 | { |
df71837d TJ |
270 | int len = 0; |
271 | ||
272 | if (xfrm_ctx) { | |
273 | len += sizeof(struct xfrm_user_sec_ctx); | |
274 | len += xfrm_ctx->ctx_len; | |
275 | } | |
276 | return len; | |
277 | } | |
278 | ||
1da177e4 LT |
279 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
280 | { | |
281 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
282 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
283 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
284 | x->props.mode = p->mode; | |
285 | x->props.replay_window = p->replay_window; | |
286 | x->props.reqid = p->reqid; | |
287 | x->props.family = p->family; | |
54489c14 | 288 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 289 | x->props.flags = p->flags; |
196b0036 | 290 | |
df9dcb45 | 291 | if (x->props.mode == XFRM_MODE_TRANSPORT) |
196b0036 | 292 | x->sel.family = p->family; |
df9dcb45 | 293 | |
1da177e4 LT |
294 | } |
295 | ||
d51d081d JHS |
296 | /* |
297 | * someday when pfkey also has support, we could have the code | |
298 | * somehow made shareable and move it to xfrm_state.c - JHS | |
299 | * | |
300 | */ | |
5424f32e | 301 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 302 | { |
5424f32e TG |
303 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
304 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
305 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
306 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d JHS |
307 | |
308 | if (rp) { | |
309 | struct xfrm_replay_state *replay; | |
5424f32e | 310 | replay = nla_data(rp); |
d51d081d JHS |
311 | memcpy(&x->replay, replay, sizeof(*replay)); |
312 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
313 | } | |
314 | ||
315 | if (lt) { | |
316 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 317 | ltime = nla_data(lt); |
d51d081d JHS |
318 | x->curlft.bytes = ltime->bytes; |
319 | x->curlft.packets = ltime->packets; | |
320 | x->curlft.add_time = ltime->add_time; | |
321 | x->curlft.use_time = ltime->use_time; | |
322 | } | |
323 | ||
cf5cb79f | 324 | if (et) |
5424f32e | 325 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 326 | |
cf5cb79f | 327 | if (rt) |
5424f32e | 328 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
329 | } |
330 | ||
1da177e4 | 331 | static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, |
5424f32e | 332 | struct nlattr **attrs, |
1da177e4 LT |
333 | int *errp) |
334 | { | |
335 | struct xfrm_state *x = xfrm_state_alloc(); | |
336 | int err = -ENOMEM; | |
337 | ||
338 | if (!x) | |
339 | goto error_no_put; | |
340 | ||
341 | copy_from_user_state(x, p); | |
342 | ||
1a6509d9 HX |
343 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
344 | attrs[XFRMA_ALG_AEAD]))) | |
345 | goto error; | |
1da177e4 LT |
346 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, |
347 | xfrm_aalg_get_byname, | |
35a7aa08 | 348 | attrs[XFRMA_ALG_AUTH]))) |
1da177e4 LT |
349 | goto error; |
350 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
351 | xfrm_ealg_get_byname, | |
35a7aa08 | 352 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
353 | goto error; |
354 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
355 | xfrm_calg_get_byname, | |
35a7aa08 | 356 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 357 | goto error; |
fd21150a TG |
358 | |
359 | if (attrs[XFRMA_ENCAP]) { | |
360 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
361 | sizeof(*x->encap), GFP_KERNEL); | |
362 | if (x->encap == NULL) | |
363 | goto error; | |
364 | } | |
365 | ||
366 | if (attrs[XFRMA_COADDR]) { | |
367 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
368 | sizeof(*x->coaddr), GFP_KERNEL); | |
369 | if (x->coaddr == NULL) | |
370 | goto error; | |
371 | } | |
372 | ||
72cb6962 | 373 | err = xfrm_init_state(x); |
1da177e4 LT |
374 | if (err) |
375 | goto error; | |
376 | ||
fd21150a TG |
377 | if (attrs[XFRMA_SEC_CTX] && |
378 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
379 | goto error; |
380 | ||
1da177e4 | 381 | x->km.seq = p->seq; |
d51d081d JHS |
382 | x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; |
383 | /* sysctl_xfrm_aevent_etime is in 100ms units */ | |
384 | x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; | |
385 | x->preplay.bitmap = 0; | |
386 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
387 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
388 | ||
389 | /* override default values from above */ | |
390 | ||
5424f32e | 391 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
392 | |
393 | return x; | |
394 | ||
395 | error: | |
396 | x->km.state = XFRM_STATE_DEAD; | |
397 | xfrm_state_put(x); | |
398 | error_no_put: | |
399 | *errp = err; | |
400 | return NULL; | |
401 | } | |
402 | ||
22e70050 | 403 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 404 | struct nlattr **attrs) |
1da177e4 | 405 | { |
7b67c857 | 406 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
407 | struct xfrm_state *x; |
408 | int err; | |
26b15dad | 409 | struct km_event c; |
1da177e4 | 410 | |
35a7aa08 | 411 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
412 | if (err) |
413 | return err; | |
414 | ||
35a7aa08 | 415 | x = xfrm_state_construct(p, attrs, &err); |
1da177e4 LT |
416 | if (!x) |
417 | return err; | |
418 | ||
26b15dad | 419 | xfrm_state_hold(x); |
1da177e4 LT |
420 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
421 | err = xfrm_state_add(x); | |
422 | else | |
423 | err = xfrm_state_update(x); | |
424 | ||
ab5f5e8b JL |
425 | xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, |
426 | NETLINK_CB(skb).sid); | |
161a09e7 | 427 | |
1da177e4 LT |
428 | if (err < 0) { |
429 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 430 | __xfrm_state_put(x); |
7d6dfe1f | 431 | goto out; |
1da177e4 LT |
432 | } |
433 | ||
26b15dad JHS |
434 | c.seq = nlh->nlmsg_seq; |
435 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 436 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
437 | |
438 | km_state_notify(x, &c); | |
7d6dfe1f | 439 | out: |
26b15dad | 440 | xfrm_state_put(x); |
1da177e4 LT |
441 | return err; |
442 | } | |
443 | ||
eb2971b6 | 444 | static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, |
5424f32e | 445 | struct nlattr **attrs, |
eb2971b6 MN |
446 | int *errp) |
447 | { | |
448 | struct xfrm_state *x = NULL; | |
449 | int err; | |
450 | ||
451 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
452 | err = -ESRCH; | |
453 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
454 | } else { | |
455 | xfrm_address_t *saddr = NULL; | |
456 | ||
35a7aa08 | 457 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
458 | if (!saddr) { |
459 | err = -EINVAL; | |
460 | goto out; | |
461 | } | |
462 | ||
9abbffee | 463 | err = -ESRCH; |
eb2971b6 MN |
464 | x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, |
465 | p->family); | |
466 | } | |
467 | ||
468 | out: | |
469 | if (!x && errp) | |
470 | *errp = err; | |
471 | return x; | |
472 | } | |
473 | ||
22e70050 | 474 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 475 | struct nlattr **attrs) |
1da177e4 LT |
476 | { |
477 | struct xfrm_state *x; | |
eb2971b6 | 478 | int err = -ESRCH; |
26b15dad | 479 | struct km_event c; |
7b67c857 | 480 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 | 481 | |
35a7aa08 | 482 | x = xfrm_user_state_lookup(p, attrs, &err); |
1da177e4 | 483 | if (x == NULL) |
eb2971b6 | 484 | return err; |
1da177e4 | 485 | |
6f68dc37 | 486 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
487 | goto out; |
488 | ||
1da177e4 | 489 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
490 | err = -EPERM; |
491 | goto out; | |
1da177e4 LT |
492 | } |
493 | ||
26b15dad | 494 | err = xfrm_state_delete(x); |
161a09e7 | 495 | |
c8c05a8e CZ |
496 | if (err < 0) |
497 | goto out; | |
26b15dad JHS |
498 | |
499 | c.seq = nlh->nlmsg_seq; | |
500 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 501 | c.event = nlh->nlmsg_type; |
26b15dad | 502 | km_state_notify(x, &c); |
1da177e4 | 503 | |
c8c05a8e | 504 | out: |
ab5f5e8b JL |
505 | xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, |
506 | NETLINK_CB(skb).sid); | |
c8c05a8e | 507 | xfrm_state_put(x); |
26b15dad | 508 | return err; |
1da177e4 LT |
509 | } |
510 | ||
511 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
512 | { | |
513 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
514 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
515 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
516 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
517 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 518 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
519 | p->mode = x->props.mode; |
520 | p->replay_window = x->props.replay_window; | |
521 | p->reqid = x->props.reqid; | |
522 | p->family = x->props.family; | |
523 | p->flags = x->props.flags; | |
524 | p->seq = x->km.seq; | |
525 | } | |
526 | ||
527 | struct xfrm_dump_info { | |
528 | struct sk_buff *in_skb; | |
529 | struct sk_buff *out_skb; | |
530 | u32 nlmsg_seq; | |
531 | u16 nlmsg_flags; | |
532 | int start_idx; | |
533 | int this_idx; | |
534 | }; | |
535 | ||
c0144bea TG |
536 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
537 | { | |
c0144bea TG |
538 | struct xfrm_user_sec_ctx *uctx; |
539 | struct nlattr *attr; | |
68325d3b | 540 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
541 | |
542 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
543 | if (attr == NULL) | |
544 | return -EMSGSIZE; | |
545 | ||
546 | uctx = nla_data(attr); | |
547 | uctx->exttype = XFRMA_SEC_CTX; | |
548 | uctx->len = ctx_size; | |
549 | uctx->ctx_doi = s->ctx_doi; | |
550 | uctx->ctx_alg = s->ctx_alg; | |
551 | uctx->ctx_len = s->ctx_len; | |
552 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
68325d3b HX |
557 | /* Don't change this without updating xfrm_sa_len! */ |
558 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
559 | struct xfrm_usersa_info *p, | |
560 | struct sk_buff *skb) | |
1da177e4 | 561 | { |
1da177e4 LT |
562 | copy_to_user_state(x, p); |
563 | ||
050f009e HX |
564 | if (x->coaddr) |
565 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
566 | ||
567 | if (x->lastused) | |
568 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); | |
050f009e | 569 | |
1a6509d9 HX |
570 | if (x->aead) |
571 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
1da177e4 | 572 | if (x->aalg) |
0f99be0d | 573 | NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg); |
1da177e4 | 574 | if (x->ealg) |
0f99be0d | 575 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
1da177e4 | 576 | if (x->calg) |
c0144bea | 577 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
578 | |
579 | if (x->encap) | |
c0144bea | 580 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 581 | |
c0144bea TG |
582 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
583 | goto nla_put_failure; | |
060f02a3 | 584 | |
68325d3b HX |
585 | return 0; |
586 | ||
587 | nla_put_failure: | |
588 | return -EMSGSIZE; | |
589 | } | |
590 | ||
591 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
592 | { | |
593 | struct xfrm_dump_info *sp = ptr; | |
594 | struct sk_buff *in_skb = sp->in_skb; | |
595 | struct sk_buff *skb = sp->out_skb; | |
596 | struct xfrm_usersa_info *p; | |
597 | struct nlmsghdr *nlh; | |
598 | int err; | |
599 | ||
600 | if (sp->this_idx < sp->start_idx) | |
601 | goto out; | |
602 | ||
603 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, | |
604 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
605 | if (nlh == NULL) | |
606 | return -EMSGSIZE; | |
607 | ||
608 | p = nlmsg_data(nlh); | |
609 | ||
610 | err = copy_to_user_state_extra(x, p, skb); | |
611 | if (err) | |
612 | goto nla_put_failure; | |
613 | ||
9825069d | 614 | nlmsg_end(skb, nlh); |
1da177e4 LT |
615 | out: |
616 | sp->this_idx++; | |
617 | return 0; | |
618 | ||
c0144bea | 619 | nla_put_failure: |
9825069d | 620 | nlmsg_cancel(skb, nlh); |
68325d3b | 621 | return err; |
1da177e4 LT |
622 | } |
623 | ||
624 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) | |
625 | { | |
626 | struct xfrm_dump_info info; | |
627 | ||
628 | info.in_skb = cb->skb; | |
629 | info.out_skb = skb; | |
630 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
631 | info.nlmsg_flags = NLM_F_MULTI; | |
632 | info.this_idx = 0; | |
633 | info.start_idx = cb->args[0]; | |
dc00a525 | 634 | (void) xfrm_state_walk(0, dump_one_state, &info); |
1da177e4 LT |
635 | cb->args[0] = info.this_idx; |
636 | ||
637 | return skb->len; | |
638 | } | |
639 | ||
640 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
641 | struct xfrm_state *x, u32 seq) | |
642 | { | |
643 | struct xfrm_dump_info info; | |
644 | struct sk_buff *skb; | |
645 | ||
7deb2264 | 646 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
647 | if (!skb) |
648 | return ERR_PTR(-ENOMEM); | |
649 | ||
1da177e4 LT |
650 | info.in_skb = in_skb; |
651 | info.out_skb = skb; | |
652 | info.nlmsg_seq = seq; | |
653 | info.nlmsg_flags = 0; | |
654 | info.this_idx = info.start_idx = 0; | |
655 | ||
656 | if (dump_one_state(x, 0, &info)) { | |
657 | kfree_skb(skb); | |
658 | return NULL; | |
659 | } | |
660 | ||
661 | return skb; | |
662 | } | |
663 | ||
7deb2264 TG |
664 | static inline size_t xfrm_spdinfo_msgsize(void) |
665 | { | |
666 | return NLMSG_ALIGN(4) | |
667 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
668 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
669 | } | |
670 | ||
ecfd6b18 JHS |
671 | static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
672 | { | |
5a6d3416 JHS |
673 | struct xfrmk_spdinfo si; |
674 | struct xfrmu_spdinfo spc; | |
675 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
676 | struct nlmsghdr *nlh; |
677 | u32 *f; | |
678 | ||
679 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
680 | if (nlh == NULL) /* shouldnt really happen ... */ | |
681 | return -EMSGSIZE; | |
682 | ||
683 | f = nlmsg_data(nlh); | |
684 | *f = flags; | |
685 | xfrm_spd_getinfo(&si); | |
5a6d3416 JHS |
686 | spc.incnt = si.incnt; |
687 | spc.outcnt = si.outcnt; | |
688 | spc.fwdcnt = si.fwdcnt; | |
689 | spc.inscnt = si.inscnt; | |
690 | spc.outscnt = si.outscnt; | |
691 | spc.fwdscnt = si.fwdscnt; | |
692 | sph.spdhcnt = si.spdhcnt; | |
693 | sph.spdhmcnt = si.spdhmcnt; | |
694 | ||
695 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
696 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
697 | |
698 | return nlmsg_end(skb, nlh); | |
699 | ||
700 | nla_put_failure: | |
701 | nlmsg_cancel(skb, nlh); | |
702 | return -EMSGSIZE; | |
703 | } | |
704 | ||
705 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 706 | struct nlattr **attrs) |
ecfd6b18 JHS |
707 | { |
708 | struct sk_buff *r_skb; | |
7b67c857 | 709 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
710 | u32 spid = NETLINK_CB(skb).pid; |
711 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 712 | |
7deb2264 | 713 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
714 | if (r_skb == NULL) |
715 | return -ENOMEM; | |
716 | ||
717 | if (build_spdinfo(r_skb, spid, seq, *flags) < 0) | |
718 | BUG(); | |
719 | ||
720 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
721 | } | |
722 | ||
7deb2264 TG |
723 | static inline size_t xfrm_sadinfo_msgsize(void) |
724 | { | |
725 | return NLMSG_ALIGN(4) | |
726 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
727 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
728 | } | |
729 | ||
28d8909b JHS |
730 | static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
731 | { | |
af11e316 JHS |
732 | struct xfrmk_sadinfo si; |
733 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
734 | struct nlmsghdr *nlh; |
735 | u32 *f; | |
736 | ||
737 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
738 | if (nlh == NULL) /* shouldnt really happen ... */ | |
739 | return -EMSGSIZE; | |
740 | ||
741 | f = nlmsg_data(nlh); | |
742 | *f = flags; | |
743 | xfrm_sad_getinfo(&si); | |
744 | ||
af11e316 JHS |
745 | sh.sadhmcnt = si.sadhmcnt; |
746 | sh.sadhcnt = si.sadhcnt; | |
747 | ||
748 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
749 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
750 | |
751 | return nlmsg_end(skb, nlh); | |
752 | ||
753 | nla_put_failure: | |
754 | nlmsg_cancel(skb, nlh); | |
755 | return -EMSGSIZE; | |
756 | } | |
757 | ||
758 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 759 | struct nlattr **attrs) |
28d8909b JHS |
760 | { |
761 | struct sk_buff *r_skb; | |
7b67c857 | 762 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
763 | u32 spid = NETLINK_CB(skb).pid; |
764 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 765 | |
7deb2264 | 766 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
767 | if (r_skb == NULL) |
768 | return -ENOMEM; | |
769 | ||
770 | if (build_sadinfo(r_skb, spid, seq, *flags) < 0) | |
771 | BUG(); | |
772 | ||
773 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
774 | } | |
775 | ||
22e70050 | 776 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 777 | struct nlattr **attrs) |
1da177e4 | 778 | { |
7b67c857 | 779 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
780 | struct xfrm_state *x; |
781 | struct sk_buff *resp_skb; | |
eb2971b6 | 782 | int err = -ESRCH; |
1da177e4 | 783 | |
35a7aa08 | 784 | x = xfrm_user_state_lookup(p, attrs, &err); |
1da177e4 LT |
785 | if (x == NULL) |
786 | goto out_noput; | |
787 | ||
788 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
789 | if (IS_ERR(resp_skb)) { | |
790 | err = PTR_ERR(resp_skb); | |
791 | } else { | |
082a1ad5 | 792 | err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
793 | } |
794 | xfrm_state_put(x); | |
795 | out_noput: | |
796 | return err; | |
797 | } | |
798 | ||
799 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
800 | { | |
801 | switch (p->info.id.proto) { | |
802 | case IPPROTO_AH: | |
803 | case IPPROTO_ESP: | |
804 | break; | |
805 | ||
806 | case IPPROTO_COMP: | |
807 | /* IPCOMP spi is 16-bits. */ | |
808 | if (p->max >= 0x10000) | |
809 | return -EINVAL; | |
810 | break; | |
811 | ||
812 | default: | |
813 | return -EINVAL; | |
3ff50b79 | 814 | } |
1da177e4 LT |
815 | |
816 | if (p->min > p->max) | |
817 | return -EINVAL; | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
22e70050 | 822 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 823 | struct nlattr **attrs) |
1da177e4 LT |
824 | { |
825 | struct xfrm_state *x; | |
826 | struct xfrm_userspi_info *p; | |
827 | struct sk_buff *resp_skb; | |
828 | xfrm_address_t *daddr; | |
829 | int family; | |
830 | int err; | |
831 | ||
7b67c857 | 832 | p = nlmsg_data(nlh); |
1da177e4 LT |
833 | err = verify_userspi_info(p); |
834 | if (err) | |
835 | goto out_noput; | |
836 | ||
837 | family = p->info.family; | |
838 | daddr = &p->info.id.daddr; | |
839 | ||
840 | x = NULL; | |
841 | if (p->info.seq) { | |
842 | x = xfrm_find_acq_byseq(p->info.seq); | |
843 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
844 | xfrm_state_put(x); | |
845 | x = NULL; | |
846 | } | |
847 | } | |
848 | ||
849 | if (!x) | |
850 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
851 | p->info.id.proto, daddr, | |
852 | &p->info.saddr, 1, | |
853 | family); | |
854 | err = -ENOENT; | |
855 | if (x == NULL) | |
856 | goto out_noput; | |
857 | ||
658b219e HX |
858 | err = xfrm_alloc_spi(x, p->min, p->max); |
859 | if (err) | |
860 | goto out; | |
1da177e4 | 861 | |
658b219e | 862 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
863 | if (IS_ERR(resp_skb)) { |
864 | err = PTR_ERR(resp_skb); | |
865 | goto out; | |
866 | } | |
867 | ||
082a1ad5 | 868 | err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
869 | |
870 | out: | |
871 | xfrm_state_put(x); | |
872 | out_noput: | |
873 | return err; | |
874 | } | |
875 | ||
b798a9ed | 876 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
877 | { |
878 | switch (dir) { | |
879 | case XFRM_POLICY_IN: | |
880 | case XFRM_POLICY_OUT: | |
881 | case XFRM_POLICY_FWD: | |
882 | break; | |
883 | ||
884 | default: | |
885 | return -EINVAL; | |
3ff50b79 | 886 | } |
1da177e4 LT |
887 | |
888 | return 0; | |
889 | } | |
890 | ||
b798a9ed | 891 | static int verify_policy_type(u8 type) |
f7b6983f MN |
892 | { |
893 | switch (type) { | |
894 | case XFRM_POLICY_TYPE_MAIN: | |
895 | #ifdef CONFIG_XFRM_SUB_POLICY | |
896 | case XFRM_POLICY_TYPE_SUB: | |
897 | #endif | |
898 | break; | |
899 | ||
900 | default: | |
901 | return -EINVAL; | |
3ff50b79 | 902 | } |
f7b6983f MN |
903 | |
904 | return 0; | |
905 | } | |
906 | ||
1da177e4 LT |
907 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
908 | { | |
909 | switch (p->share) { | |
910 | case XFRM_SHARE_ANY: | |
911 | case XFRM_SHARE_SESSION: | |
912 | case XFRM_SHARE_USER: | |
913 | case XFRM_SHARE_UNIQUE: | |
914 | break; | |
915 | ||
916 | default: | |
917 | return -EINVAL; | |
3ff50b79 | 918 | } |
1da177e4 LT |
919 | |
920 | switch (p->action) { | |
921 | case XFRM_POLICY_ALLOW: | |
922 | case XFRM_POLICY_BLOCK: | |
923 | break; | |
924 | ||
925 | default: | |
926 | return -EINVAL; | |
3ff50b79 | 927 | } |
1da177e4 LT |
928 | |
929 | switch (p->sel.family) { | |
930 | case AF_INET: | |
931 | break; | |
932 | ||
933 | case AF_INET6: | |
934 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
935 | break; | |
936 | #else | |
937 | return -EAFNOSUPPORT; | |
938 | #endif | |
939 | ||
940 | default: | |
941 | return -EINVAL; | |
3ff50b79 | 942 | } |
1da177e4 LT |
943 | |
944 | return verify_policy_dir(p->dir); | |
945 | } | |
946 | ||
5424f32e | 947 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 948 | { |
5424f32e | 949 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
950 | struct xfrm_user_sec_ctx *uctx; |
951 | ||
952 | if (!rt) | |
953 | return 0; | |
954 | ||
5424f32e | 955 | uctx = nla_data(rt); |
df71837d TJ |
956 | return security_xfrm_policy_alloc(pol, uctx); |
957 | } | |
958 | ||
1da177e4 LT |
959 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
960 | int nr) | |
961 | { | |
962 | int i; | |
963 | ||
964 | xp->xfrm_nr = nr; | |
965 | for (i = 0; i < nr; i++, ut++) { | |
966 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
967 | ||
968 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
969 | memcpy(&t->saddr, &ut->saddr, | |
970 | sizeof(xfrm_address_t)); | |
971 | t->reqid = ut->reqid; | |
972 | t->mode = ut->mode; | |
973 | t->share = ut->share; | |
974 | t->optional = ut->optional; | |
975 | t->aalgos = ut->aalgos; | |
976 | t->ealgos = ut->ealgos; | |
977 | t->calgos = ut->calgos; | |
8511d01d | 978 | t->encap_family = ut->family; |
1da177e4 LT |
979 | } |
980 | } | |
981 | ||
b4ad86bf DM |
982 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
983 | { | |
984 | int i; | |
985 | ||
986 | if (nr > XFRM_MAX_DEPTH) | |
987 | return -EINVAL; | |
988 | ||
989 | for (i = 0; i < nr; i++) { | |
990 | /* We never validated the ut->family value, so many | |
991 | * applications simply leave it at zero. The check was | |
992 | * never made and ut->family was ignored because all | |
993 | * templates could be assumed to have the same family as | |
994 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
995 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
996 | */ | |
997 | if (!ut[i].family) | |
998 | ut[i].family = family; | |
999 | ||
1000 | switch (ut[i].family) { | |
1001 | case AF_INET: | |
1002 | break; | |
1003 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1004 | case AF_INET6: | |
1005 | break; | |
1006 | #endif | |
1007 | default: | |
1008 | return -EINVAL; | |
3ff50b79 | 1009 | } |
b4ad86bf DM |
1010 | } |
1011 | ||
1012 | return 0; | |
1013 | } | |
1014 | ||
5424f32e | 1015 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1016 | { |
5424f32e | 1017 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1018 | |
1019 | if (!rt) { | |
1020 | pol->xfrm_nr = 0; | |
1021 | } else { | |
5424f32e TG |
1022 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1023 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1024 | int err; |
1da177e4 | 1025 | |
b4ad86bf DM |
1026 | err = validate_tmpl(nr, utmpl, pol->family); |
1027 | if (err) | |
1028 | return err; | |
1da177e4 | 1029 | |
5424f32e | 1030 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1031 | } |
1032 | return 0; | |
1033 | } | |
1034 | ||
5424f32e | 1035 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1036 | { |
5424f32e | 1037 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1038 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1039 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1040 | int err; |
1041 | ||
1042 | if (rt) { | |
5424f32e | 1043 | upt = nla_data(rt); |
f7b6983f MN |
1044 | type = upt->type; |
1045 | } | |
1046 | ||
1047 | err = verify_policy_type(type); | |
1048 | if (err) | |
1049 | return err; | |
1050 | ||
1051 | *tp = type; | |
1052 | return 0; | |
1053 | } | |
1054 | ||
1da177e4 LT |
1055 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1056 | { | |
1057 | xp->priority = p->priority; | |
1058 | xp->index = p->index; | |
1059 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1060 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1061 | xp->action = p->action; | |
1062 | xp->flags = p->flags; | |
1063 | xp->family = p->sel.family; | |
1064 | /* XXX xp->share = p->share; */ | |
1065 | } | |
1066 | ||
1067 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1068 | { | |
1069 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1070 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1071 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1072 | p->priority = xp->priority; | |
1073 | p->index = xp->index; | |
1074 | p->sel.family = xp->family; | |
1075 | p->dir = dir; | |
1076 | p->action = xp->action; | |
1077 | p->flags = xp->flags; | |
1078 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1079 | } | |
1080 | ||
5424f32e | 1081 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 LT |
1082 | { |
1083 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
1084 | int err; | |
1085 | ||
1086 | if (!xp) { | |
1087 | *errp = -ENOMEM; | |
1088 | return NULL; | |
1089 | } | |
1090 | ||
1091 | copy_from_user_policy(xp, p); | |
df71837d | 1092 | |
35a7aa08 | 1093 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1094 | if (err) |
1095 | goto error; | |
1096 | ||
35a7aa08 TG |
1097 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1098 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1099 | if (err) |
1100 | goto error; | |
1da177e4 LT |
1101 | |
1102 | return xp; | |
f7b6983f MN |
1103 | error: |
1104 | *errp = err; | |
073a3719 | 1105 | xp->dead = 1; |
64c31b3f | 1106 | xfrm_policy_destroy(xp); |
f7b6983f | 1107 | return NULL; |
1da177e4 LT |
1108 | } |
1109 | ||
22e70050 | 1110 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1111 | struct nlattr **attrs) |
1da177e4 | 1112 | { |
7b67c857 | 1113 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1114 | struct xfrm_policy *xp; |
26b15dad | 1115 | struct km_event c; |
1da177e4 LT |
1116 | int err; |
1117 | int excl; | |
1118 | ||
1119 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1120 | if (err) |
1121 | return err; | |
35a7aa08 | 1122 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1123 | if (err) |
1124 | return err; | |
1125 | ||
35a7aa08 | 1126 | xp = xfrm_policy_construct(p, attrs, &err); |
1da177e4 LT |
1127 | if (!xp) |
1128 | return err; | |
1129 | ||
26b15dad JHS |
1130 | /* shouldnt excl be based on nlh flags?? |
1131 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1132 | * in netlink excl is a flag and you wouldnt need | |
1133 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1134 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1135 | err = xfrm_policy_insert(p->dir, xp, excl); | |
ab5f5e8b JL |
1136 | xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid, |
1137 | NETLINK_CB(skb).sid); | |
161a09e7 | 1138 | |
1da177e4 | 1139 | if (err) { |
5f8ac64b | 1140 | security_xfrm_policy_free(xp); |
1da177e4 LT |
1141 | kfree(xp); |
1142 | return err; | |
1143 | } | |
1144 | ||
f60f6b8f | 1145 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1146 | c.seq = nlh->nlmsg_seq; |
1147 | c.pid = nlh->nlmsg_pid; | |
1148 | km_policy_notify(xp, p->dir, &c); | |
1149 | ||
1da177e4 LT |
1150 | xfrm_pol_put(xp); |
1151 | ||
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1156 | { | |
1157 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1158 | int i; | |
1159 | ||
1160 | if (xp->xfrm_nr == 0) | |
1161 | return 0; | |
1162 | ||
1163 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1164 | struct xfrm_user_tmpl *up = &vec[i]; | |
1165 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1166 | ||
1167 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1168 | up->family = kp->encap_family; |
1da177e4 LT |
1169 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1170 | up->reqid = kp->reqid; | |
1171 | up->mode = kp->mode; | |
1172 | up->share = kp->share; | |
1173 | up->optional = kp->optional; | |
1174 | up->aalgos = kp->aalgos; | |
1175 | up->ealgos = kp->ealgos; | |
1176 | up->calgos = kp->calgos; | |
1177 | } | |
df71837d | 1178 | |
c0144bea TG |
1179 | return nla_put(skb, XFRMA_TMPL, |
1180 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1181 | } |
1182 | ||
1183 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1184 | { | |
1185 | if (x->security) { | |
1186 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1187 | } |
1188 | return 0; | |
0d681623 | 1189 | } |
df71837d | 1190 | |
0d681623 SH |
1191 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1192 | { | |
1193 | if (xp->security) { | |
1194 | return copy_sec_ctx(xp->security, skb); | |
1195 | } | |
1196 | return 0; | |
df71837d | 1197 | } |
cfbfd45a TG |
1198 | static inline size_t userpolicy_type_attrsize(void) |
1199 | { | |
1200 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1201 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1202 | #else | |
1203 | return 0; | |
1204 | #endif | |
1205 | } | |
df71837d | 1206 | |
f7b6983f | 1207 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1208 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1209 | { |
c0144bea TG |
1210 | struct xfrm_userpolicy_type upt = { |
1211 | .type = type, | |
1212 | }; | |
f7b6983f | 1213 | |
c0144bea | 1214 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1215 | } |
1216 | ||
1217 | #else | |
b798a9ed | 1218 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1219 | { |
1220 | return 0; | |
1221 | } | |
1222 | #endif | |
1223 | ||
1da177e4 LT |
1224 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1225 | { | |
1226 | struct xfrm_dump_info *sp = ptr; | |
1227 | struct xfrm_userpolicy_info *p; | |
1228 | struct sk_buff *in_skb = sp->in_skb; | |
1229 | struct sk_buff *skb = sp->out_skb; | |
1230 | struct nlmsghdr *nlh; | |
1da177e4 LT |
1231 | |
1232 | if (sp->this_idx < sp->start_idx) | |
1233 | goto out; | |
1234 | ||
79b8b7f4 TG |
1235 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1236 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1237 | if (nlh == NULL) | |
1238 | return -EMSGSIZE; | |
1da177e4 | 1239 | |
7b67c857 | 1240 | p = nlmsg_data(nlh); |
1da177e4 LT |
1241 | copy_to_user_policy(xp, p, dir); |
1242 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1243 | goto nlmsg_failure; | |
df71837d TJ |
1244 | if (copy_to_user_sec_ctx(xp, skb)) |
1245 | goto nlmsg_failure; | |
1459bb36 | 1246 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1247 | goto nlmsg_failure; |
1da177e4 | 1248 | |
9825069d | 1249 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1250 | out: |
1251 | sp->this_idx++; | |
1252 | return 0; | |
1253 | ||
1254 | nlmsg_failure: | |
9825069d TG |
1255 | nlmsg_cancel(skb, nlh); |
1256 | return -EMSGSIZE; | |
1da177e4 LT |
1257 | } |
1258 | ||
1259 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
1260 | { | |
1261 | struct xfrm_dump_info info; | |
1262 | ||
1263 | info.in_skb = cb->skb; | |
1264 | info.out_skb = skb; | |
1265 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1266 | info.nlmsg_flags = NLM_F_MULTI; | |
1267 | info.this_idx = 0; | |
1268 | info.start_idx = cb->args[0]; | |
f7b6983f MN |
1269 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); |
1270 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1271 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); | |
1272 | #endif | |
1da177e4 LT |
1273 | cb->args[0] = info.this_idx; |
1274 | ||
1275 | return skb->len; | |
1276 | } | |
1277 | ||
1278 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1279 | struct xfrm_policy *xp, | |
1280 | int dir, u32 seq) | |
1281 | { | |
1282 | struct xfrm_dump_info info; | |
1283 | struct sk_buff *skb; | |
1284 | ||
7deb2264 | 1285 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1286 | if (!skb) |
1287 | return ERR_PTR(-ENOMEM); | |
1288 | ||
1da177e4 LT |
1289 | info.in_skb = in_skb; |
1290 | info.out_skb = skb; | |
1291 | info.nlmsg_seq = seq; | |
1292 | info.nlmsg_flags = 0; | |
1293 | info.this_idx = info.start_idx = 0; | |
1294 | ||
1295 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1296 | kfree_skb(skb); | |
1297 | return NULL; | |
1298 | } | |
1299 | ||
1300 | return skb; | |
1301 | } | |
1302 | ||
22e70050 | 1303 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1304 | struct nlattr **attrs) |
1da177e4 LT |
1305 | { |
1306 | struct xfrm_policy *xp; | |
1307 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1308 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1309 | int err; |
26b15dad | 1310 | struct km_event c; |
1da177e4 LT |
1311 | int delete; |
1312 | ||
7b67c857 | 1313 | p = nlmsg_data(nlh); |
1da177e4 LT |
1314 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1315 | ||
35a7aa08 | 1316 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1317 | if (err) |
1318 | return err; | |
1319 | ||
1da177e4 LT |
1320 | err = verify_policy_dir(p->dir); |
1321 | if (err) | |
1322 | return err; | |
1323 | ||
1324 | if (p->index) | |
ef41aaa0 | 1325 | xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); |
df71837d | 1326 | else { |
5424f32e | 1327 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1328 | struct xfrm_policy tmp; |
1329 | ||
35a7aa08 | 1330 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1331 | if (err) |
1332 | return err; | |
1333 | ||
1334 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1335 | if (rt) { | |
5424f32e | 1336 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d TJ |
1337 | |
1338 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1339 | return err; | |
1340 | } | |
ef41aaa0 EP |
1341 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1342 | delete, &err); | |
df71837d TJ |
1343 | security_xfrm_policy_free(&tmp); |
1344 | } | |
1da177e4 LT |
1345 | if (xp == NULL) |
1346 | return -ENOENT; | |
1347 | ||
1348 | if (!delete) { | |
1349 | struct sk_buff *resp_skb; | |
1350 | ||
1351 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1352 | if (IS_ERR(resp_skb)) { | |
1353 | err = PTR_ERR(resp_skb); | |
1354 | } else { | |
082a1ad5 TG |
1355 | err = nlmsg_unicast(xfrm_nl, resp_skb, |
1356 | NETLINK_CB(skb).pid); | |
1da177e4 | 1357 | } |
26b15dad | 1358 | } else { |
ab5f5e8b JL |
1359 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
1360 | NETLINK_CB(skb).loginuid, | |
1361 | NETLINK_CB(skb).sid); | |
13fcfbb0 DM |
1362 | |
1363 | if (err != 0) | |
c8c05a8e | 1364 | goto out; |
13fcfbb0 | 1365 | |
e7443892 | 1366 | c.data.byid = p->index; |
f60f6b8f | 1367 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1368 | c.seq = nlh->nlmsg_seq; |
1369 | c.pid = nlh->nlmsg_pid; | |
1370 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1371 | } |
1372 | ||
c8c05a8e | 1373 | out: |
ef41aaa0 | 1374 | xfrm_pol_put(xp); |
1da177e4 LT |
1375 | return err; |
1376 | } | |
1377 | ||
22e70050 | 1378 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1379 | struct nlattr **attrs) |
1da177e4 | 1380 | { |
26b15dad | 1381 | struct km_event c; |
7b67c857 | 1382 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1383 | struct xfrm_audit audit_info; |
4aa2e62c | 1384 | int err; |
1da177e4 | 1385 | |
161a09e7 JL |
1386 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1387 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1388 | err = xfrm_state_flush(p->proto, &audit_info); |
1389 | if (err) | |
1390 | return err; | |
bf08867f | 1391 | c.data.proto = p->proto; |
f60f6b8f | 1392 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1393 | c.seq = nlh->nlmsg_seq; |
1394 | c.pid = nlh->nlmsg_pid; | |
1395 | km_state_notify(NULL, &c); | |
1396 | ||
1da177e4 LT |
1397 | return 0; |
1398 | } | |
1399 | ||
7deb2264 TG |
1400 | static inline size_t xfrm_aevent_msgsize(void) |
1401 | { | |
1402 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) | |
1403 | + nla_total_size(sizeof(struct xfrm_replay_state)) | |
1404 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) | |
1405 | + nla_total_size(4) /* XFRM_AE_RTHR */ | |
1406 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1407 | } | |
d51d081d JHS |
1408 | |
1409 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1410 | { | |
1411 | struct xfrm_aevent_id *id; | |
1412 | struct nlmsghdr *nlh; | |
d51d081d | 1413 | |
79b8b7f4 TG |
1414 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1415 | if (nlh == NULL) | |
1416 | return -EMSGSIZE; | |
d51d081d | 1417 | |
7b67c857 | 1418 | id = nlmsg_data(nlh); |
2b5f6dcc | 1419 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1420 | id->sa_id.spi = x->id.spi; |
1421 | id->sa_id.family = x->props.family; | |
1422 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1423 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1424 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1425 | id->flags = c->data.aevent; |
1426 | ||
c0144bea TG |
1427 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
1428 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
d51d081d | 1429 | |
c0144bea TG |
1430 | if (id->flags & XFRM_AE_RTHR) |
1431 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1432 | |
c0144bea TG |
1433 | if (id->flags & XFRM_AE_ETHR) |
1434 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1435 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1436 | |
9825069d | 1437 | return nlmsg_end(skb, nlh); |
d51d081d | 1438 | |
c0144bea | 1439 | nla_put_failure: |
9825069d TG |
1440 | nlmsg_cancel(skb, nlh); |
1441 | return -EMSGSIZE; | |
d51d081d JHS |
1442 | } |
1443 | ||
22e70050 | 1444 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1445 | struct nlattr **attrs) |
d51d081d JHS |
1446 | { |
1447 | struct xfrm_state *x; | |
1448 | struct sk_buff *r_skb; | |
1449 | int err; | |
1450 | struct km_event c; | |
7b67c857 | 1451 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1452 | struct xfrm_usersa_id *id = &p->sa_id; |
1453 | ||
7deb2264 | 1454 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1455 | if (r_skb == NULL) |
1456 | return -ENOMEM; | |
1457 | ||
1458 | x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); | |
1459 | if (x == NULL) { | |
b08d5840 | 1460 | kfree_skb(r_skb); |
d51d081d JHS |
1461 | return -ESRCH; |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * XXX: is this lock really needed - none of the other | |
1466 | * gets lock (the concern is things getting updated | |
1467 | * while we are still reading) - jhs | |
1468 | */ | |
1469 | spin_lock_bh(&x->lock); | |
1470 | c.data.aevent = p->flags; | |
1471 | c.seq = nlh->nlmsg_seq; | |
1472 | c.pid = nlh->nlmsg_pid; | |
1473 | ||
1474 | if (build_aevent(r_skb, x, &c) < 0) | |
1475 | BUG(); | |
082a1ad5 | 1476 | err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1477 | spin_unlock_bh(&x->lock); |
1478 | xfrm_state_put(x); | |
1479 | return err; | |
1480 | } | |
1481 | ||
22e70050 | 1482 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1483 | struct nlattr **attrs) |
d51d081d JHS |
1484 | { |
1485 | struct xfrm_state *x; | |
1486 | struct km_event c; | |
1487 | int err = - EINVAL; | |
7b67c857 | 1488 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e TG |
1489 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
1490 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
d51d081d JHS |
1491 | |
1492 | if (!lt && !rp) | |
1493 | return err; | |
1494 | ||
1495 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1496 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1497 | return err; | |
1498 | ||
1499 | x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
1500 | if (x == NULL) | |
1501 | return -ESRCH; | |
1502 | ||
1503 | if (x->km.state != XFRM_STATE_VALID) | |
1504 | goto out; | |
1505 | ||
1506 | spin_lock_bh(&x->lock); | |
35a7aa08 | 1507 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1508 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1509 | |
1510 | c.event = nlh->nlmsg_type; | |
1511 | c.seq = nlh->nlmsg_seq; | |
1512 | c.pid = nlh->nlmsg_pid; | |
1513 | c.data.aevent = XFRM_AE_CU; | |
1514 | km_state_notify(x, &c); | |
1515 | err = 0; | |
1516 | out: | |
1517 | xfrm_state_put(x); | |
1518 | return err; | |
1519 | } | |
1520 | ||
22e70050 | 1521 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1522 | struct nlattr **attrs) |
1da177e4 | 1523 | { |
f7b6983f | 1524 | struct km_event c; |
b798a9ed | 1525 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1526 | int err; |
161a09e7 | 1527 | struct xfrm_audit audit_info; |
f7b6983f | 1528 | |
35a7aa08 | 1529 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1530 | if (err) |
1531 | return err; | |
26b15dad | 1532 | |
161a09e7 JL |
1533 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1534 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1535 | err = xfrm_policy_flush(type, &audit_info); |
1536 | if (err) | |
1537 | return err; | |
f7b6983f | 1538 | c.data.type = type; |
f60f6b8f | 1539 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1540 | c.seq = nlh->nlmsg_seq; |
1541 | c.pid = nlh->nlmsg_pid; | |
1542 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1543 | return 0; |
1544 | } | |
1545 | ||
22e70050 | 1546 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1547 | struct nlattr **attrs) |
6c5c8ca7 JHS |
1548 | { |
1549 | struct xfrm_policy *xp; | |
7b67c857 | 1550 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1551 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1552 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1553 | int err = -ENOENT; |
1554 | ||
35a7aa08 | 1555 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1556 | if (err) |
1557 | return err; | |
1558 | ||
6c5c8ca7 | 1559 | if (p->index) |
ef41aaa0 | 1560 | xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1561 | else { |
5424f32e | 1562 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
6c5c8ca7 JHS |
1563 | struct xfrm_policy tmp; |
1564 | ||
35a7aa08 | 1565 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1566 | if (err) |
1567 | return err; | |
1568 | ||
1569 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1570 | if (rt) { | |
5424f32e | 1571 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 JHS |
1572 | |
1573 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1574 | return err; | |
1575 | } | |
ef41aaa0 EP |
1576 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1577 | 0, &err); | |
6c5c8ca7 JHS |
1578 | security_xfrm_policy_free(&tmp); |
1579 | } | |
1580 | ||
1581 | if (xp == NULL) | |
ef41aaa0 EP |
1582 | return -ENOENT; |
1583 | read_lock(&xp->lock); | |
6c5c8ca7 JHS |
1584 | if (xp->dead) { |
1585 | read_unlock(&xp->lock); | |
1586 | goto out; | |
1587 | } | |
1588 | ||
1589 | read_unlock(&xp->lock); | |
1590 | err = 0; | |
1591 | if (up->hard) { | |
1592 | xfrm_policy_delete(xp, p->dir); | |
ab5f5e8b JL |
1593 | xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid, |
1594 | NETLINK_CB(skb).sid); | |
161a09e7 | 1595 | |
6c5c8ca7 JHS |
1596 | } else { |
1597 | // reset the timers here? | |
1598 | printk("Dont know what to do with soft policy expire\n"); | |
1599 | } | |
1600 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1601 | ||
1602 | out: | |
1603 | xfrm_pol_put(xp); | |
1604 | return err; | |
1605 | } | |
1606 | ||
22e70050 | 1607 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1608 | struct nlattr **attrs) |
53bc6b4d JHS |
1609 | { |
1610 | struct xfrm_state *x; | |
1611 | int err; | |
7b67c857 | 1612 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d JHS |
1613 | struct xfrm_usersa_info *p = &ue->state; |
1614 | ||
1615 | x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); | |
53bc6b4d | 1616 | |
3a765aa5 | 1617 | err = -ENOENT; |
53bc6b4d JHS |
1618 | if (x == NULL) |
1619 | return err; | |
1620 | ||
53bc6b4d | 1621 | spin_lock_bh(&x->lock); |
3a765aa5 | 1622 | err = -EINVAL; |
53bc6b4d JHS |
1623 | if (x->km.state != XFRM_STATE_VALID) |
1624 | goto out; | |
1625 | km_state_expired(x, ue->hard, current->pid); | |
1626 | ||
161a09e7 | 1627 | if (ue->hard) { |
53bc6b4d | 1628 | __xfrm_state_delete(x); |
ab5f5e8b JL |
1629 | xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid, |
1630 | NETLINK_CB(skb).sid); | |
161a09e7 | 1631 | } |
3a765aa5 | 1632 | err = 0; |
53bc6b4d JHS |
1633 | out: |
1634 | spin_unlock_bh(&x->lock); | |
1635 | xfrm_state_put(x); | |
1636 | return err; | |
1637 | } | |
1638 | ||
22e70050 | 1639 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1640 | struct nlattr **attrs) |
980ebd25 JHS |
1641 | { |
1642 | struct xfrm_policy *xp; | |
1643 | struct xfrm_user_tmpl *ut; | |
1644 | int i; | |
5424f32e | 1645 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
980ebd25 | 1646 | |
7b67c857 | 1647 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
980ebd25 JHS |
1648 | struct xfrm_state *x = xfrm_state_alloc(); |
1649 | int err = -ENOMEM; | |
1650 | ||
1651 | if (!x) | |
1652 | return err; | |
1653 | ||
1654 | err = verify_newpolicy_info(&ua->policy); | |
1655 | if (err) { | |
1656 | printk("BAD policy passed\n"); | |
1657 | kfree(x); | |
1658 | return err; | |
1659 | } | |
1660 | ||
1661 | /* build an XP */ | |
5424f32e | 1662 | xp = xfrm_policy_construct(&ua->policy, attrs, &err); |
b4ad86bf | 1663 | if (!xp) { |
980ebd25 JHS |
1664 | kfree(x); |
1665 | return err; | |
1666 | } | |
1667 | ||
1668 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1669 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1670 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1671 | ||
5424f32e | 1672 | ut = nla_data(rt); |
980ebd25 JHS |
1673 | /* extract the templates and for each call km_key */ |
1674 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1675 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1676 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1677 | x->props.mode = t->mode; | |
1678 | x->props.reqid = t->reqid; | |
1679 | x->props.family = ut->family; | |
1680 | t->aalgos = ua->aalgos; | |
1681 | t->ealgos = ua->ealgos; | |
1682 | t->calgos = ua->calgos; | |
1683 | err = km_query(x, t, xp); | |
1684 | ||
1685 | } | |
1686 | ||
1687 | kfree(x); | |
1688 | kfree(xp); | |
1689 | ||
1690 | return 0; | |
1691 | } | |
1692 | ||
5c79de6e | 1693 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 1694 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
5424f32e | 1695 | struct nlattr **attrs, int *num) |
5c79de6e | 1696 | { |
5424f32e | 1697 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
1698 | struct xfrm_user_migrate *um; |
1699 | int i, num_migrate; | |
1700 | ||
5424f32e TG |
1701 | um = nla_data(rt); |
1702 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
1703 | |
1704 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1705 | return -EINVAL; | |
1706 | ||
1707 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1708 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1709 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1710 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1711 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1712 | ||
1713 | ma->proto = um->proto; | |
1714 | ma->mode = um->mode; | |
1715 | ma->reqid = um->reqid; | |
1716 | ||
1717 | ma->old_family = um->old_family; | |
1718 | ma->new_family = um->new_family; | |
1719 | } | |
1720 | ||
1721 | *num = i; | |
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1726 | struct nlattr **attrs) |
5c79de6e | 1727 | { |
7b67c857 | 1728 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e SS |
1729 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
1730 | u8 type; | |
1731 | int err; | |
1732 | int n = 0; | |
1733 | ||
35a7aa08 | 1734 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 1735 | return -EINVAL; |
5c79de6e | 1736 | |
5424f32e | 1737 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
1738 | if (err) |
1739 | return err; | |
1740 | ||
1741 | err = copy_from_user_migrate((struct xfrm_migrate *)m, | |
5424f32e | 1742 | attrs, &n); |
5c79de6e SS |
1743 | if (err) |
1744 | return err; | |
1745 | ||
1746 | if (!n) | |
1747 | return 0; | |
1748 | ||
1749 | xfrm_migrate(&pi->sel, pi->dir, type, m, n); | |
1750 | ||
1751 | return 0; | |
1752 | } | |
1753 | #else | |
1754 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1755 | struct nlattr **attrs) |
5c79de6e SS |
1756 | { |
1757 | return -ENOPROTOOPT; | |
1758 | } | |
1759 | #endif | |
1760 | ||
1761 | #ifdef CONFIG_XFRM_MIGRATE | |
1762 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1763 | { | |
1764 | struct xfrm_user_migrate um; | |
1765 | ||
1766 | memset(&um, 0, sizeof(um)); | |
1767 | um.proto = m->proto; | |
1768 | um.mode = m->mode; | |
1769 | um.reqid = m->reqid; | |
1770 | um.old_family = m->old_family; | |
1771 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1772 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1773 | um.new_family = m->new_family; | |
1774 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1775 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1776 | ||
c0144bea | 1777 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
1778 | } |
1779 | ||
7deb2264 TG |
1780 | static inline size_t xfrm_migrate_msgsize(int num_migrate) |
1781 | { | |
1782 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
1783 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
1784 | + userpolicy_type_attrsize(); | |
1785 | } | |
1786 | ||
5c79de6e SS |
1787 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
1788 | int num_migrate, struct xfrm_selector *sel, | |
1789 | u8 dir, u8 type) | |
1790 | { | |
1791 | struct xfrm_migrate *mp; | |
1792 | struct xfrm_userpolicy_id *pol_id; | |
1793 | struct nlmsghdr *nlh; | |
5c79de6e SS |
1794 | int i; |
1795 | ||
79b8b7f4 TG |
1796 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
1797 | if (nlh == NULL) | |
1798 | return -EMSGSIZE; | |
5c79de6e | 1799 | |
7b67c857 | 1800 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
1801 | /* copy data from selector, dir, and type to the pol_id */ |
1802 | memset(pol_id, 0, sizeof(*pol_id)); | |
1803 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1804 | pol_id->dir = dir; | |
1805 | ||
1806 | if (copy_to_user_policy_type(type, skb) < 0) | |
1807 | goto nlmsg_failure; | |
1808 | ||
1809 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1810 | if (copy_to_user_migrate(mp, skb) < 0) | |
1811 | goto nlmsg_failure; | |
1812 | } | |
1813 | ||
9825069d | 1814 | return nlmsg_end(skb, nlh); |
5c79de6e | 1815 | nlmsg_failure: |
9825069d TG |
1816 | nlmsg_cancel(skb, nlh); |
1817 | return -EMSGSIZE; | |
5c79de6e SS |
1818 | } |
1819 | ||
1820 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1821 | struct xfrm_migrate *m, int num_migrate) | |
1822 | { | |
1823 | struct sk_buff *skb; | |
5c79de6e | 1824 | |
7deb2264 | 1825 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC); |
5c79de6e SS |
1826 | if (skb == NULL) |
1827 | return -ENOMEM; | |
1828 | ||
1829 | /* build migrate */ | |
1830 | if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) | |
1831 | BUG(); | |
1832 | ||
082a1ad5 | 1833 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
1834 | } |
1835 | #else | |
1836 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1837 | struct xfrm_migrate *m, int num_migrate) | |
1838 | { | |
1839 | return -ENOPROTOOPT; | |
1840 | } | |
1841 | #endif | |
d51d081d | 1842 | |
a7bd9a45 | 1843 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
1844 | |
1845 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1846 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1847 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1848 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1849 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1850 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1851 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1852 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1853 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1854 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b TG |
1855 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
1856 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
6c5c8ca7 | 1857 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 1858 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 1859 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
1860 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1861 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 1862 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 1863 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
1864 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
1865 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
1866 | }; |
1867 | ||
492b558b TG |
1868 | #undef XMSGSIZE |
1869 | ||
cf5cb79f | 1870 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
1a6509d9 | 1871 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
1872 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
1873 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
1874 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
1875 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
1876 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
1877 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
1878 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
1879 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
1880 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
1881 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
1882 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
1883 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
1884 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
1885 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
1886 | }; | |
1887 | ||
1da177e4 | 1888 | static struct xfrm_link { |
5424f32e | 1889 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 1890 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
492b558b TG |
1891 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1892 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1893 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1894 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1895 | .dump = xfrm_dump_sa }, | |
1896 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1897 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1898 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1899 | .dump = xfrm_dump_policy }, | |
1900 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
980ebd25 | 1901 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1902 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1903 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1904 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1905 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1906 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1907 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1908 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1909 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 1910 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 1911 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 1912 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
1913 | }; |
1914 | ||
1d00a4eb | 1915 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1916 | { |
35a7aa08 | 1917 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 1918 | struct xfrm_link *link; |
a7bd9a45 | 1919 | int type, err; |
1da177e4 | 1920 | |
1da177e4 | 1921 | type = nlh->nlmsg_type; |
1da177e4 | 1922 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 1923 | return -EINVAL; |
1da177e4 LT |
1924 | |
1925 | type -= XFRM_MSG_BASE; | |
1926 | link = &xfrm_dispatch[type]; | |
1927 | ||
1928 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
1929 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
1930 | return -EPERM; | |
1da177e4 | 1931 | |
492b558b TG |
1932 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1933 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1934 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 1935 | if (link->dump == NULL) |
1d00a4eb | 1936 | return -EINVAL; |
88fc2c84 | 1937 | |
c702e804 | 1938 | return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); |
1da177e4 LT |
1939 | } |
1940 | ||
35a7aa08 | 1941 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 1942 | xfrma_policy); |
a7bd9a45 TG |
1943 | if (err < 0) |
1944 | return err; | |
1da177e4 LT |
1945 | |
1946 | if (link->doit == NULL) | |
1d00a4eb | 1947 | return -EINVAL; |
1da177e4 | 1948 | |
5424f32e | 1949 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
1950 | } |
1951 | ||
cd40b7d3 | 1952 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 1953 | { |
cd40b7d3 DL |
1954 | mutex_lock(&xfrm_cfg_mutex); |
1955 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
1956 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
1957 | } |
1958 | ||
7deb2264 TG |
1959 | static inline size_t xfrm_expire_msgsize(void) |
1960 | { | |
1961 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)); | |
1962 | } | |
1963 | ||
d51d081d | 1964 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1965 | { |
1966 | struct xfrm_user_expire *ue; | |
1967 | struct nlmsghdr *nlh; | |
1da177e4 | 1968 | |
79b8b7f4 TG |
1969 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
1970 | if (nlh == NULL) | |
1971 | return -EMSGSIZE; | |
1da177e4 | 1972 | |
7b67c857 | 1973 | ue = nlmsg_data(nlh); |
1da177e4 | 1974 | copy_to_user_state(x, &ue->state); |
d51d081d | 1975 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 1976 | |
9825069d | 1977 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
1978 | } |
1979 | ||
26b15dad | 1980 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1981 | { |
1982 | struct sk_buff *skb; | |
1983 | ||
7deb2264 | 1984 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
1985 | if (skb == NULL) |
1986 | return -ENOMEM; | |
1987 | ||
d51d081d | 1988 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
1989 | BUG(); |
1990 | ||
082a1ad5 | 1991 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
1992 | } |
1993 | ||
d51d081d JHS |
1994 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
1995 | { | |
1996 | struct sk_buff *skb; | |
d51d081d | 1997 | |
7deb2264 | 1998 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1999 | if (skb == NULL) |
2000 | return -ENOMEM; | |
2001 | ||
2002 | if (build_aevent(skb, x, c) < 0) | |
2003 | BUG(); | |
2004 | ||
082a1ad5 | 2005 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2006 | } |
2007 | ||
26b15dad JHS |
2008 | static int xfrm_notify_sa_flush(struct km_event *c) |
2009 | { | |
2010 | struct xfrm_usersa_flush *p; | |
2011 | struct nlmsghdr *nlh; | |
2012 | struct sk_buff *skb; | |
7deb2264 | 2013 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2014 | |
7deb2264 | 2015 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2016 | if (skb == NULL) |
2017 | return -ENOMEM; | |
26b15dad | 2018 | |
79b8b7f4 TG |
2019 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2020 | if (nlh == NULL) { | |
2021 | kfree_skb(skb); | |
2022 | return -EMSGSIZE; | |
2023 | } | |
26b15dad | 2024 | |
7b67c857 | 2025 | p = nlmsg_data(nlh); |
bf08867f | 2026 | p->proto = c->data.proto; |
26b15dad | 2027 | |
9825069d | 2028 | nlmsg_end(skb, nlh); |
26b15dad | 2029 | |
082a1ad5 | 2030 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2031 | } |
2032 | ||
7deb2264 | 2033 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2034 | { |
7deb2264 | 2035 | size_t l = 0; |
1a6509d9 HX |
2036 | if (x->aead) |
2037 | l += nla_total_size(aead_len(x->aead)); | |
26b15dad | 2038 | if (x->aalg) |
0f99be0d | 2039 | l += nla_total_size(xfrm_alg_len(x->aalg)); |
26b15dad | 2040 | if (x->ealg) |
0f99be0d | 2041 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2042 | if (x->calg) |
7deb2264 | 2043 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2044 | if (x->encap) |
7deb2264 | 2045 | l += nla_total_size(sizeof(*x->encap)); |
68325d3b HX |
2046 | if (x->security) |
2047 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2048 | x->security->ctx_len); | |
2049 | if (x->coaddr) | |
2050 | l += nla_total_size(sizeof(*x->coaddr)); | |
2051 | ||
d26f3984 HX |
2052 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2053 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2054 | |
2055 | return l; | |
2056 | } | |
2057 | ||
2058 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2059 | { | |
2060 | struct xfrm_usersa_info *p; | |
0603eac0 | 2061 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2062 | struct nlmsghdr *nlh; |
2063 | struct sk_buff *skb; | |
26b15dad | 2064 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2065 | int headlen; |
2066 | ||
2067 | headlen = sizeof(*p); | |
2068 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2069 | len += nla_total_size(headlen); |
0603eac0 HX |
2070 | headlen = sizeof(*id); |
2071 | } | |
7deb2264 | 2072 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2073 | |
7deb2264 | 2074 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2075 | if (skb == NULL) |
2076 | return -ENOMEM; | |
26b15dad | 2077 | |
79b8b7f4 TG |
2078 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2079 | if (nlh == NULL) | |
c0144bea | 2080 | goto nla_put_failure; |
26b15dad | 2081 | |
7b67c857 | 2082 | p = nlmsg_data(nlh); |
0603eac0 | 2083 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2084 | struct nlattr *attr; |
2085 | ||
7b67c857 | 2086 | id = nlmsg_data(nlh); |
0603eac0 HX |
2087 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2088 | id->spi = x->id.spi; | |
2089 | id->family = x->props.family; | |
2090 | id->proto = x->id.proto; | |
2091 | ||
c0144bea TG |
2092 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2093 | if (attr == NULL) | |
2094 | goto nla_put_failure; | |
2095 | ||
2096 | p = nla_data(attr); | |
0603eac0 HX |
2097 | } |
2098 | ||
68325d3b HX |
2099 | if (copy_to_user_state_extra(x, p, skb)) |
2100 | goto nla_put_failure; | |
26b15dad | 2101 | |
9825069d | 2102 | nlmsg_end(skb, nlh); |
26b15dad | 2103 | |
082a1ad5 | 2104 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2105 | |
c0144bea | 2106 | nla_put_failure: |
68325d3b HX |
2107 | /* Somebody screwed up with xfrm_sa_len! */ |
2108 | WARN_ON(1); | |
26b15dad JHS |
2109 | kfree_skb(skb); |
2110 | return -1; | |
2111 | } | |
2112 | ||
2113 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2114 | { | |
2115 | ||
2116 | switch (c->event) { | |
f60f6b8f | 2117 | case XFRM_MSG_EXPIRE: |
26b15dad | 2118 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2119 | case XFRM_MSG_NEWAE: |
2120 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2121 | case XFRM_MSG_DELSA: |
2122 | case XFRM_MSG_UPDSA: | |
2123 | case XFRM_MSG_NEWSA: | |
26b15dad | 2124 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2125 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2126 | return xfrm_notify_sa_flush(c); |
2127 | default: | |
2128 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2129 | break; | |
2130 | } | |
2131 | ||
2132 | return 0; | |
2133 | ||
2134 | } | |
2135 | ||
7deb2264 TG |
2136 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2137 | struct xfrm_policy *xp) | |
2138 | { | |
2139 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2140 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2141 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) | |
2142 | + userpolicy_type_attrsize(); | |
2143 | } | |
2144 | ||
1da177e4 LT |
2145 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2146 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2147 | int dir) | |
2148 | { | |
2149 | struct xfrm_user_acquire *ua; | |
2150 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2151 | __u32 seq = xfrm_get_acqseq(); |
2152 | ||
79b8b7f4 TG |
2153 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2154 | if (nlh == NULL) | |
2155 | return -EMSGSIZE; | |
1da177e4 | 2156 | |
7b67c857 | 2157 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2158 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2159 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2160 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2161 | copy_to_user_policy(xp, &ua->policy, dir); | |
2162 | ua->aalgos = xt->aalgos; | |
2163 | ua->ealgos = xt->ealgos; | |
2164 | ua->calgos = xt->calgos; | |
2165 | ua->seq = x->km.seq = seq; | |
2166 | ||
2167 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2168 | goto nlmsg_failure; | |
0d681623 | 2169 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2170 | goto nlmsg_failure; |
1459bb36 | 2171 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2172 | goto nlmsg_failure; |
1da177e4 | 2173 | |
9825069d | 2174 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2175 | |
2176 | nlmsg_failure: | |
9825069d TG |
2177 | nlmsg_cancel(skb, nlh); |
2178 | return -EMSGSIZE; | |
1da177e4 LT |
2179 | } |
2180 | ||
2181 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2182 | struct xfrm_policy *xp, int dir) | |
2183 | { | |
2184 | struct sk_buff *skb; | |
1da177e4 | 2185 | |
7deb2264 | 2186 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2187 | if (skb == NULL) |
2188 | return -ENOMEM; | |
2189 | ||
2190 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2191 | BUG(); | |
2192 | ||
082a1ad5 | 2193 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2194 | } |
2195 | ||
2196 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2197 | * or more templates. | |
2198 | */ | |
cb969f07 | 2199 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2200 | u8 *data, int len, int *dir) |
2201 | { | |
2202 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
2203 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2204 | struct xfrm_policy *xp; | |
2205 | int nr; | |
2206 | ||
cb969f07 | 2207 | switch (sk->sk_family) { |
1da177e4 LT |
2208 | case AF_INET: |
2209 | if (opt != IP_XFRM_POLICY) { | |
2210 | *dir = -EOPNOTSUPP; | |
2211 | return NULL; | |
2212 | } | |
2213 | break; | |
2214 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2215 | case AF_INET6: | |
2216 | if (opt != IPV6_XFRM_POLICY) { | |
2217 | *dir = -EOPNOTSUPP; | |
2218 | return NULL; | |
2219 | } | |
2220 | break; | |
2221 | #endif | |
2222 | default: | |
2223 | *dir = -EINVAL; | |
2224 | return NULL; | |
2225 | } | |
2226 | ||
2227 | *dir = -EINVAL; | |
2228 | ||
2229 | if (len < sizeof(*p) || | |
2230 | verify_newpolicy_info(p)) | |
2231 | return NULL; | |
2232 | ||
2233 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2234 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2235 | return NULL; |
2236 | ||
a4f1bac6 HX |
2237 | if (p->dir > XFRM_POLICY_OUT) |
2238 | return NULL; | |
2239 | ||
1da177e4 LT |
2240 | xp = xfrm_policy_alloc(GFP_KERNEL); |
2241 | if (xp == NULL) { | |
2242 | *dir = -ENOBUFS; | |
2243 | return NULL; | |
2244 | } | |
2245 | ||
2246 | copy_from_user_policy(xp, p); | |
f7b6983f | 2247 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2248 | copy_templates(xp, ut, nr); |
2249 | ||
2250 | *dir = p->dir; | |
2251 | ||
2252 | return xp; | |
2253 | } | |
2254 | ||
7deb2264 TG |
2255 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2256 | { | |
2257 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2258 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2259 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
2260 | + userpolicy_type_attrsize(); | |
2261 | } | |
2262 | ||
1da177e4 | 2263 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
d51d081d | 2264 | int dir, struct km_event *c) |
1da177e4 LT |
2265 | { |
2266 | struct xfrm_user_polexpire *upe; | |
2267 | struct nlmsghdr *nlh; | |
d51d081d | 2268 | int hard = c->data.hard; |
1da177e4 | 2269 | |
79b8b7f4 TG |
2270 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2271 | if (nlh == NULL) | |
2272 | return -EMSGSIZE; | |
1da177e4 | 2273 | |
7b67c857 | 2274 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2275 | copy_to_user_policy(xp, &upe->pol, dir); |
2276 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2277 | goto nlmsg_failure; | |
df71837d TJ |
2278 | if (copy_to_user_sec_ctx(xp, skb)) |
2279 | goto nlmsg_failure; | |
1459bb36 | 2280 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2281 | goto nlmsg_failure; |
1da177e4 LT |
2282 | upe->hard = !!hard; |
2283 | ||
9825069d | 2284 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2285 | |
2286 | nlmsg_failure: | |
9825069d TG |
2287 | nlmsg_cancel(skb, nlh); |
2288 | return -EMSGSIZE; | |
1da177e4 LT |
2289 | } |
2290 | ||
26b15dad | 2291 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
2292 | { |
2293 | struct sk_buff *skb; | |
1da177e4 | 2294 | |
7deb2264 | 2295 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2296 | if (skb == NULL) |
2297 | return -ENOMEM; | |
2298 | ||
d51d081d | 2299 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2300 | BUG(); |
2301 | ||
082a1ad5 | 2302 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2303 | } |
2304 | ||
26b15dad JHS |
2305 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2306 | { | |
2307 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 2308 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2309 | struct nlmsghdr *nlh; |
2310 | struct sk_buff *skb; | |
7deb2264 | 2311 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2312 | int headlen; |
2313 | ||
2314 | headlen = sizeof(*p); | |
2315 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2316 | len += nla_total_size(headlen); |
0603eac0 HX |
2317 | headlen = sizeof(*id); |
2318 | } | |
cfbfd45a | 2319 | len += userpolicy_type_attrsize(); |
7deb2264 | 2320 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2321 | |
7deb2264 | 2322 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2323 | if (skb == NULL) |
2324 | return -ENOMEM; | |
26b15dad | 2325 | |
79b8b7f4 TG |
2326 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2327 | if (nlh == NULL) | |
2328 | goto nlmsg_failure; | |
26b15dad | 2329 | |
7b67c857 | 2330 | p = nlmsg_data(nlh); |
0603eac0 | 2331 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2332 | struct nlattr *attr; |
2333 | ||
7b67c857 | 2334 | id = nlmsg_data(nlh); |
0603eac0 HX |
2335 | memset(id, 0, sizeof(*id)); |
2336 | id->dir = dir; | |
2337 | if (c->data.byid) | |
2338 | id->index = xp->index; | |
2339 | else | |
2340 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2341 | ||
c0144bea TG |
2342 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2343 | if (attr == NULL) | |
2344 | goto nlmsg_failure; | |
2345 | ||
2346 | p = nla_data(attr); | |
0603eac0 | 2347 | } |
26b15dad | 2348 | |
26b15dad JHS |
2349 | copy_to_user_policy(xp, p, dir); |
2350 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2351 | goto nlmsg_failure; | |
1459bb36 | 2352 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2353 | goto nlmsg_failure; |
26b15dad | 2354 | |
9825069d | 2355 | nlmsg_end(skb, nlh); |
26b15dad | 2356 | |
082a1ad5 | 2357 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2358 | |
2359 | nlmsg_failure: | |
2360 | kfree_skb(skb); | |
2361 | return -1; | |
2362 | } | |
2363 | ||
2364 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2365 | { | |
2366 | struct nlmsghdr *nlh; | |
2367 | struct sk_buff *skb; | |
26b15dad | 2368 | |
7deb2264 | 2369 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2370 | if (skb == NULL) |
2371 | return -ENOMEM; | |
26b15dad | 2372 | |
79b8b7f4 TG |
2373 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2374 | if (nlh == NULL) | |
2375 | goto nlmsg_failure; | |
0c51f53c JHS |
2376 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2377 | goto nlmsg_failure; | |
26b15dad | 2378 | |
9825069d | 2379 | nlmsg_end(skb, nlh); |
26b15dad | 2380 | |
082a1ad5 | 2381 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2382 | |
2383 | nlmsg_failure: | |
2384 | kfree_skb(skb); | |
2385 | return -1; | |
2386 | } | |
2387 | ||
2388 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2389 | { | |
2390 | ||
2391 | switch (c->event) { | |
f60f6b8f HX |
2392 | case XFRM_MSG_NEWPOLICY: |
2393 | case XFRM_MSG_UPDPOLICY: | |
2394 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2395 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2396 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2397 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2398 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2399 | return xfrm_exp_policy_notify(xp, dir, c); |
2400 | default: | |
2401 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2402 | } | |
2403 | ||
2404 | return 0; | |
2405 | ||
2406 | } | |
2407 | ||
7deb2264 TG |
2408 | static inline size_t xfrm_report_msgsize(void) |
2409 | { | |
2410 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2411 | } | |
2412 | ||
97a64b45 MN |
2413 | static int build_report(struct sk_buff *skb, u8 proto, |
2414 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2415 | { | |
2416 | struct xfrm_user_report *ur; | |
2417 | struct nlmsghdr *nlh; | |
97a64b45 | 2418 | |
79b8b7f4 TG |
2419 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2420 | if (nlh == NULL) | |
2421 | return -EMSGSIZE; | |
97a64b45 | 2422 | |
7b67c857 | 2423 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2424 | ur->proto = proto; |
2425 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2426 | ||
2427 | if (addr) | |
c0144bea | 2428 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2429 | |
9825069d | 2430 | return nlmsg_end(skb, nlh); |
97a64b45 | 2431 | |
c0144bea | 2432 | nla_put_failure: |
9825069d TG |
2433 | nlmsg_cancel(skb, nlh); |
2434 | return -EMSGSIZE; | |
97a64b45 MN |
2435 | } |
2436 | ||
2437 | static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, | |
2438 | xfrm_address_t *addr) | |
2439 | { | |
2440 | struct sk_buff *skb; | |
97a64b45 | 2441 | |
7deb2264 | 2442 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2443 | if (skb == NULL) |
2444 | return -ENOMEM; | |
2445 | ||
2446 | if (build_report(skb, proto, sel, addr) < 0) | |
2447 | BUG(); | |
2448 | ||
082a1ad5 | 2449 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2450 | } |
2451 | ||
1da177e4 LT |
2452 | static struct xfrm_mgr netlink_mgr = { |
2453 | .id = "netlink", | |
2454 | .notify = xfrm_send_state_notify, | |
2455 | .acquire = xfrm_send_acquire, | |
2456 | .compile_policy = xfrm_compile_policy, | |
2457 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2458 | .report = xfrm_send_report, |
5c79de6e | 2459 | .migrate = xfrm_send_migrate, |
1da177e4 LT |
2460 | }; |
2461 | ||
2462 | static int __init xfrm_user_init(void) | |
2463 | { | |
be33690d PM |
2464 | struct sock *nlsk; |
2465 | ||
654b32c6 | 2466 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
1da177e4 | 2467 | |
b4b51029 | 2468 | nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2469 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2470 | if (nlsk == NULL) |
1da177e4 | 2471 | return -ENOMEM; |
be33690d | 2472 | rcu_assign_pointer(xfrm_nl, nlsk); |
1da177e4 LT |
2473 | |
2474 | xfrm_register_km(&netlink_mgr); | |
2475 | ||
2476 | return 0; | |
2477 | } | |
2478 | ||
2479 | static void __exit xfrm_user_exit(void) | |
2480 | { | |
be33690d PM |
2481 | struct sock *nlsk = xfrm_nl; |
2482 | ||
1da177e4 | 2483 | xfrm_unregister_km(&netlink_mgr); |
be33690d PM |
2484 | rcu_assign_pointer(xfrm_nl, NULL); |
2485 | synchronize_rcu(); | |
b7c6ba6e | 2486 | netlink_kernel_release(nlsk); |
1da177e4 LT |
2487 | } |
2488 | ||
2489 | module_init(xfrm_user_init); | |
2490 | module_exit(xfrm_user_exit); | |
2491 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2492 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2493 |