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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 HX |
290 | |
291 | /* | |
292 | * Set inner address family if the KM left it as zero. | |
293 | * See comment in validate_tmpl. | |
294 | */ | |
295 | if (!x->sel.family) | |
296 | x->sel.family = p->family; | |
1da177e4 LT |
297 | } |
298 | ||
d51d081d JHS |
299 | /* |
300 | * someday when pfkey also has support, we could have the code | |
301 | * somehow made shareable and move it to xfrm_state.c - JHS | |
302 | * | |
303 | */ | |
5424f32e | 304 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 305 | { |
5424f32e TG |
306 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
307 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
308 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
309 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d JHS |
310 | |
311 | if (rp) { | |
312 | struct xfrm_replay_state *replay; | |
5424f32e | 313 | replay = nla_data(rp); |
d51d081d JHS |
314 | memcpy(&x->replay, replay, sizeof(*replay)); |
315 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
316 | } | |
317 | ||
318 | if (lt) { | |
319 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 320 | ltime = nla_data(lt); |
d51d081d JHS |
321 | x->curlft.bytes = ltime->bytes; |
322 | x->curlft.packets = ltime->packets; | |
323 | x->curlft.add_time = ltime->add_time; | |
324 | x->curlft.use_time = ltime->use_time; | |
325 | } | |
326 | ||
cf5cb79f | 327 | if (et) |
5424f32e | 328 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 329 | |
cf5cb79f | 330 | if (rt) |
5424f32e | 331 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
332 | } |
333 | ||
1da177e4 | 334 | static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, |
5424f32e | 335 | struct nlattr **attrs, |
1da177e4 LT |
336 | int *errp) |
337 | { | |
338 | struct xfrm_state *x = xfrm_state_alloc(); | |
339 | int err = -ENOMEM; | |
340 | ||
341 | if (!x) | |
342 | goto error_no_put; | |
343 | ||
344 | copy_from_user_state(x, p); | |
345 | ||
1a6509d9 HX |
346 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
347 | attrs[XFRMA_ALG_AEAD]))) | |
348 | goto error; | |
1da177e4 LT |
349 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, |
350 | xfrm_aalg_get_byname, | |
35a7aa08 | 351 | attrs[XFRMA_ALG_AUTH]))) |
1da177e4 LT |
352 | goto error; |
353 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
354 | xfrm_ealg_get_byname, | |
35a7aa08 | 355 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
356 | goto error; |
357 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
358 | xfrm_calg_get_byname, | |
35a7aa08 | 359 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 360 | goto error; |
fd21150a TG |
361 | |
362 | if (attrs[XFRMA_ENCAP]) { | |
363 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
364 | sizeof(*x->encap), GFP_KERNEL); | |
365 | if (x->encap == NULL) | |
366 | goto error; | |
367 | } | |
368 | ||
369 | if (attrs[XFRMA_COADDR]) { | |
370 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
371 | sizeof(*x->coaddr), GFP_KERNEL); | |
372 | if (x->coaddr == NULL) | |
373 | goto error; | |
374 | } | |
375 | ||
72cb6962 | 376 | err = xfrm_init_state(x); |
1da177e4 LT |
377 | if (err) |
378 | goto error; | |
379 | ||
fd21150a TG |
380 | if (attrs[XFRMA_SEC_CTX] && |
381 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
382 | goto error; |
383 | ||
1da177e4 | 384 | x->km.seq = p->seq; |
d51d081d JHS |
385 | x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; |
386 | /* sysctl_xfrm_aevent_etime is in 100ms units */ | |
387 | x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; | |
388 | x->preplay.bitmap = 0; | |
389 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
390 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
391 | ||
392 | /* override default values from above */ | |
393 | ||
5424f32e | 394 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
395 | |
396 | return x; | |
397 | ||
398 | error: | |
399 | x->km.state = XFRM_STATE_DEAD; | |
400 | xfrm_state_put(x); | |
401 | error_no_put: | |
402 | *errp = err; | |
403 | return NULL; | |
404 | } | |
405 | ||
22e70050 | 406 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 407 | struct nlattr **attrs) |
1da177e4 | 408 | { |
7b67c857 | 409 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
410 | struct xfrm_state *x; |
411 | int err; | |
26b15dad | 412 | struct km_event c; |
1da177e4 | 413 | |
35a7aa08 | 414 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
415 | if (err) |
416 | return err; | |
417 | ||
35a7aa08 | 418 | x = xfrm_state_construct(p, attrs, &err); |
1da177e4 LT |
419 | if (!x) |
420 | return err; | |
421 | ||
26b15dad | 422 | xfrm_state_hold(x); |
1da177e4 LT |
423 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
424 | err = xfrm_state_add(x); | |
425 | else | |
426 | err = xfrm_state_update(x); | |
427 | ||
ab5f5e8b JL |
428 | xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, |
429 | NETLINK_CB(skb).sid); | |
161a09e7 | 430 | |
1da177e4 LT |
431 | if (err < 0) { |
432 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 433 | __xfrm_state_put(x); |
7d6dfe1f | 434 | goto out; |
1da177e4 LT |
435 | } |
436 | ||
26b15dad JHS |
437 | c.seq = nlh->nlmsg_seq; |
438 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 439 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
440 | |
441 | km_state_notify(x, &c); | |
7d6dfe1f | 442 | out: |
26b15dad | 443 | xfrm_state_put(x); |
1da177e4 LT |
444 | return err; |
445 | } | |
446 | ||
eb2971b6 | 447 | static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, |
5424f32e | 448 | struct nlattr **attrs, |
eb2971b6 MN |
449 | int *errp) |
450 | { | |
451 | struct xfrm_state *x = NULL; | |
452 | int err; | |
453 | ||
454 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
455 | err = -ESRCH; | |
456 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
457 | } else { | |
458 | xfrm_address_t *saddr = NULL; | |
459 | ||
35a7aa08 | 460 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
461 | if (!saddr) { |
462 | err = -EINVAL; | |
463 | goto out; | |
464 | } | |
465 | ||
9abbffee | 466 | err = -ESRCH; |
eb2971b6 MN |
467 | x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, |
468 | p->family); | |
469 | } | |
470 | ||
471 | out: | |
472 | if (!x && errp) | |
473 | *errp = err; | |
474 | return x; | |
475 | } | |
476 | ||
22e70050 | 477 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 478 | struct nlattr **attrs) |
1da177e4 LT |
479 | { |
480 | struct xfrm_state *x; | |
eb2971b6 | 481 | int err = -ESRCH; |
26b15dad | 482 | struct km_event c; |
7b67c857 | 483 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 | 484 | |
35a7aa08 | 485 | x = xfrm_user_state_lookup(p, attrs, &err); |
1da177e4 | 486 | if (x == NULL) |
eb2971b6 | 487 | return err; |
1da177e4 | 488 | |
6f68dc37 | 489 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
490 | goto out; |
491 | ||
1da177e4 | 492 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
493 | err = -EPERM; |
494 | goto out; | |
1da177e4 LT |
495 | } |
496 | ||
26b15dad | 497 | err = xfrm_state_delete(x); |
161a09e7 | 498 | |
c8c05a8e CZ |
499 | if (err < 0) |
500 | goto out; | |
26b15dad JHS |
501 | |
502 | c.seq = nlh->nlmsg_seq; | |
503 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 504 | c.event = nlh->nlmsg_type; |
26b15dad | 505 | km_state_notify(x, &c); |
1da177e4 | 506 | |
c8c05a8e | 507 | out: |
ab5f5e8b JL |
508 | xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, |
509 | NETLINK_CB(skb).sid); | |
c8c05a8e | 510 | xfrm_state_put(x); |
26b15dad | 511 | return err; |
1da177e4 LT |
512 | } |
513 | ||
514 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
515 | { | |
516 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
517 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
518 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
519 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
520 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 521 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
522 | p->mode = x->props.mode; |
523 | p->replay_window = x->props.replay_window; | |
524 | p->reqid = x->props.reqid; | |
525 | p->family = x->props.family; | |
526 | p->flags = x->props.flags; | |
527 | p->seq = x->km.seq; | |
528 | } | |
529 | ||
530 | struct xfrm_dump_info { | |
531 | struct sk_buff *in_skb; | |
532 | struct sk_buff *out_skb; | |
533 | u32 nlmsg_seq; | |
534 | u16 nlmsg_flags; | |
535 | int start_idx; | |
536 | int this_idx; | |
537 | }; | |
538 | ||
c0144bea TG |
539 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
540 | { | |
c0144bea TG |
541 | struct xfrm_user_sec_ctx *uctx; |
542 | struct nlattr *attr; | |
68325d3b | 543 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
544 | |
545 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
546 | if (attr == NULL) | |
547 | return -EMSGSIZE; | |
548 | ||
549 | uctx = nla_data(attr); | |
550 | uctx->exttype = XFRMA_SEC_CTX; | |
551 | uctx->len = ctx_size; | |
552 | uctx->ctx_doi = s->ctx_doi; | |
553 | uctx->ctx_alg = s->ctx_alg; | |
554 | uctx->ctx_len = s->ctx_len; | |
555 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
68325d3b HX |
560 | /* Don't change this without updating xfrm_sa_len! */ |
561 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
562 | struct xfrm_usersa_info *p, | |
563 | struct sk_buff *skb) | |
1da177e4 | 564 | { |
1da177e4 LT |
565 | copy_to_user_state(x, p); |
566 | ||
050f009e HX |
567 | if (x->coaddr) |
568 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
569 | ||
570 | if (x->lastused) | |
571 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); | |
050f009e | 572 | |
1a6509d9 HX |
573 | if (x->aead) |
574 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
1da177e4 | 575 | if (x->aalg) |
0f99be0d | 576 | NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg); |
1da177e4 | 577 | if (x->ealg) |
0f99be0d | 578 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
1da177e4 | 579 | if (x->calg) |
c0144bea | 580 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
581 | |
582 | if (x->encap) | |
c0144bea | 583 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 584 | |
c0144bea TG |
585 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
586 | goto nla_put_failure; | |
060f02a3 | 587 | |
68325d3b HX |
588 | return 0; |
589 | ||
590 | nla_put_failure: | |
591 | return -EMSGSIZE; | |
592 | } | |
593 | ||
594 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
595 | { | |
596 | struct xfrm_dump_info *sp = ptr; | |
597 | struct sk_buff *in_skb = sp->in_skb; | |
598 | struct sk_buff *skb = sp->out_skb; | |
599 | struct xfrm_usersa_info *p; | |
600 | struct nlmsghdr *nlh; | |
601 | int err; | |
602 | ||
603 | if (sp->this_idx < sp->start_idx) | |
604 | goto out; | |
605 | ||
606 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, | |
607 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
608 | if (nlh == NULL) | |
609 | return -EMSGSIZE; | |
610 | ||
611 | p = nlmsg_data(nlh); | |
612 | ||
613 | err = copy_to_user_state_extra(x, p, skb); | |
614 | if (err) | |
615 | goto nla_put_failure; | |
616 | ||
9825069d | 617 | nlmsg_end(skb, nlh); |
1da177e4 LT |
618 | out: |
619 | sp->this_idx++; | |
620 | return 0; | |
621 | ||
c0144bea | 622 | nla_put_failure: |
9825069d | 623 | nlmsg_cancel(skb, nlh); |
68325d3b | 624 | return err; |
1da177e4 LT |
625 | } |
626 | ||
627 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) | |
628 | { | |
629 | struct xfrm_dump_info info; | |
630 | ||
631 | info.in_skb = cb->skb; | |
632 | info.out_skb = skb; | |
633 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
634 | info.nlmsg_flags = NLM_F_MULTI; | |
635 | info.this_idx = 0; | |
636 | info.start_idx = cb->args[0]; | |
dc00a525 | 637 | (void) xfrm_state_walk(0, dump_one_state, &info); |
1da177e4 LT |
638 | cb->args[0] = info.this_idx; |
639 | ||
640 | return skb->len; | |
641 | } | |
642 | ||
643 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
644 | struct xfrm_state *x, u32 seq) | |
645 | { | |
646 | struct xfrm_dump_info info; | |
647 | struct sk_buff *skb; | |
648 | ||
7deb2264 | 649 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
650 | if (!skb) |
651 | return ERR_PTR(-ENOMEM); | |
652 | ||
1da177e4 LT |
653 | info.in_skb = in_skb; |
654 | info.out_skb = skb; | |
655 | info.nlmsg_seq = seq; | |
656 | info.nlmsg_flags = 0; | |
657 | info.this_idx = info.start_idx = 0; | |
658 | ||
659 | if (dump_one_state(x, 0, &info)) { | |
660 | kfree_skb(skb); | |
661 | return NULL; | |
662 | } | |
663 | ||
664 | return skb; | |
665 | } | |
666 | ||
7deb2264 TG |
667 | static inline size_t xfrm_spdinfo_msgsize(void) |
668 | { | |
669 | return NLMSG_ALIGN(4) | |
670 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
671 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
672 | } | |
673 | ||
ecfd6b18 JHS |
674 | static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
675 | { | |
5a6d3416 JHS |
676 | struct xfrmk_spdinfo si; |
677 | struct xfrmu_spdinfo spc; | |
678 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
679 | struct nlmsghdr *nlh; |
680 | u32 *f; | |
681 | ||
682 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
683 | if (nlh == NULL) /* shouldnt really happen ... */ | |
684 | return -EMSGSIZE; | |
685 | ||
686 | f = nlmsg_data(nlh); | |
687 | *f = flags; | |
688 | xfrm_spd_getinfo(&si); | |
5a6d3416 JHS |
689 | spc.incnt = si.incnt; |
690 | spc.outcnt = si.outcnt; | |
691 | spc.fwdcnt = si.fwdcnt; | |
692 | spc.inscnt = si.inscnt; | |
693 | spc.outscnt = si.outscnt; | |
694 | spc.fwdscnt = si.fwdscnt; | |
695 | sph.spdhcnt = si.spdhcnt; | |
696 | sph.spdhmcnt = si.spdhmcnt; | |
697 | ||
698 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
699 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
700 | |
701 | return nlmsg_end(skb, nlh); | |
702 | ||
703 | nla_put_failure: | |
704 | nlmsg_cancel(skb, nlh); | |
705 | return -EMSGSIZE; | |
706 | } | |
707 | ||
708 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 709 | struct nlattr **attrs) |
ecfd6b18 JHS |
710 | { |
711 | struct sk_buff *r_skb; | |
7b67c857 | 712 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
713 | u32 spid = NETLINK_CB(skb).pid; |
714 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 715 | |
7deb2264 | 716 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
717 | if (r_skb == NULL) |
718 | return -ENOMEM; | |
719 | ||
720 | if (build_spdinfo(r_skb, spid, seq, *flags) < 0) | |
721 | BUG(); | |
722 | ||
723 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
724 | } | |
725 | ||
7deb2264 TG |
726 | static inline size_t xfrm_sadinfo_msgsize(void) |
727 | { | |
728 | return NLMSG_ALIGN(4) | |
729 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
730 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
731 | } | |
732 | ||
28d8909b JHS |
733 | static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
734 | { | |
af11e316 JHS |
735 | struct xfrmk_sadinfo si; |
736 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
737 | struct nlmsghdr *nlh; |
738 | u32 *f; | |
739 | ||
740 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
741 | if (nlh == NULL) /* shouldnt really happen ... */ | |
742 | return -EMSGSIZE; | |
743 | ||
744 | f = nlmsg_data(nlh); | |
745 | *f = flags; | |
746 | xfrm_sad_getinfo(&si); | |
747 | ||
af11e316 JHS |
748 | sh.sadhmcnt = si.sadhmcnt; |
749 | sh.sadhcnt = si.sadhcnt; | |
750 | ||
751 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
752 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
753 | |
754 | return nlmsg_end(skb, nlh); | |
755 | ||
756 | nla_put_failure: | |
757 | nlmsg_cancel(skb, nlh); | |
758 | return -EMSGSIZE; | |
759 | } | |
760 | ||
761 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 762 | struct nlattr **attrs) |
28d8909b JHS |
763 | { |
764 | struct sk_buff *r_skb; | |
7b67c857 | 765 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
766 | u32 spid = NETLINK_CB(skb).pid; |
767 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 768 | |
7deb2264 | 769 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
770 | if (r_skb == NULL) |
771 | return -ENOMEM; | |
772 | ||
773 | if (build_sadinfo(r_skb, spid, seq, *flags) < 0) | |
774 | BUG(); | |
775 | ||
776 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
777 | } | |
778 | ||
22e70050 | 779 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 780 | struct nlattr **attrs) |
1da177e4 | 781 | { |
7b67c857 | 782 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
783 | struct xfrm_state *x; |
784 | struct sk_buff *resp_skb; | |
eb2971b6 | 785 | int err = -ESRCH; |
1da177e4 | 786 | |
35a7aa08 | 787 | x = xfrm_user_state_lookup(p, attrs, &err); |
1da177e4 LT |
788 | if (x == NULL) |
789 | goto out_noput; | |
790 | ||
791 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
792 | if (IS_ERR(resp_skb)) { | |
793 | err = PTR_ERR(resp_skb); | |
794 | } else { | |
082a1ad5 | 795 | err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
796 | } |
797 | xfrm_state_put(x); | |
798 | out_noput: | |
799 | return err; | |
800 | } | |
801 | ||
802 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
803 | { | |
804 | switch (p->info.id.proto) { | |
805 | case IPPROTO_AH: | |
806 | case IPPROTO_ESP: | |
807 | break; | |
808 | ||
809 | case IPPROTO_COMP: | |
810 | /* IPCOMP spi is 16-bits. */ | |
811 | if (p->max >= 0x10000) | |
812 | return -EINVAL; | |
813 | break; | |
814 | ||
815 | default: | |
816 | return -EINVAL; | |
3ff50b79 | 817 | } |
1da177e4 LT |
818 | |
819 | if (p->min > p->max) | |
820 | return -EINVAL; | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
22e70050 | 825 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 826 | struct nlattr **attrs) |
1da177e4 LT |
827 | { |
828 | struct xfrm_state *x; | |
829 | struct xfrm_userspi_info *p; | |
830 | struct sk_buff *resp_skb; | |
831 | xfrm_address_t *daddr; | |
832 | int family; | |
833 | int err; | |
834 | ||
7b67c857 | 835 | p = nlmsg_data(nlh); |
1da177e4 LT |
836 | err = verify_userspi_info(p); |
837 | if (err) | |
838 | goto out_noput; | |
839 | ||
840 | family = p->info.family; | |
841 | daddr = &p->info.id.daddr; | |
842 | ||
843 | x = NULL; | |
844 | if (p->info.seq) { | |
845 | x = xfrm_find_acq_byseq(p->info.seq); | |
846 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
847 | xfrm_state_put(x); | |
848 | x = NULL; | |
849 | } | |
850 | } | |
851 | ||
852 | if (!x) | |
853 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
854 | p->info.id.proto, daddr, | |
855 | &p->info.saddr, 1, | |
856 | family); | |
857 | err = -ENOENT; | |
858 | if (x == NULL) | |
859 | goto out_noput; | |
860 | ||
658b219e HX |
861 | err = xfrm_alloc_spi(x, p->min, p->max); |
862 | if (err) | |
863 | goto out; | |
1da177e4 | 864 | |
658b219e | 865 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
866 | if (IS_ERR(resp_skb)) { |
867 | err = PTR_ERR(resp_skb); | |
868 | goto out; | |
869 | } | |
870 | ||
082a1ad5 | 871 | err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
872 | |
873 | out: | |
874 | xfrm_state_put(x); | |
875 | out_noput: | |
876 | return err; | |
877 | } | |
878 | ||
b798a9ed | 879 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
880 | { |
881 | switch (dir) { | |
882 | case XFRM_POLICY_IN: | |
883 | case XFRM_POLICY_OUT: | |
884 | case XFRM_POLICY_FWD: | |
885 | break; | |
886 | ||
887 | default: | |
888 | return -EINVAL; | |
3ff50b79 | 889 | } |
1da177e4 LT |
890 | |
891 | return 0; | |
892 | } | |
893 | ||
b798a9ed | 894 | static int verify_policy_type(u8 type) |
f7b6983f MN |
895 | { |
896 | switch (type) { | |
897 | case XFRM_POLICY_TYPE_MAIN: | |
898 | #ifdef CONFIG_XFRM_SUB_POLICY | |
899 | case XFRM_POLICY_TYPE_SUB: | |
900 | #endif | |
901 | break; | |
902 | ||
903 | default: | |
904 | return -EINVAL; | |
3ff50b79 | 905 | } |
f7b6983f MN |
906 | |
907 | return 0; | |
908 | } | |
909 | ||
1da177e4 LT |
910 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
911 | { | |
912 | switch (p->share) { | |
913 | case XFRM_SHARE_ANY: | |
914 | case XFRM_SHARE_SESSION: | |
915 | case XFRM_SHARE_USER: | |
916 | case XFRM_SHARE_UNIQUE: | |
917 | break; | |
918 | ||
919 | default: | |
920 | return -EINVAL; | |
3ff50b79 | 921 | } |
1da177e4 LT |
922 | |
923 | switch (p->action) { | |
924 | case XFRM_POLICY_ALLOW: | |
925 | case XFRM_POLICY_BLOCK: | |
926 | break; | |
927 | ||
928 | default: | |
929 | return -EINVAL; | |
3ff50b79 | 930 | } |
1da177e4 LT |
931 | |
932 | switch (p->sel.family) { | |
933 | case AF_INET: | |
934 | break; | |
935 | ||
936 | case AF_INET6: | |
937 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
938 | break; | |
939 | #else | |
940 | return -EAFNOSUPPORT; | |
941 | #endif | |
942 | ||
943 | default: | |
944 | return -EINVAL; | |
3ff50b79 | 945 | } |
1da177e4 LT |
946 | |
947 | return verify_policy_dir(p->dir); | |
948 | } | |
949 | ||
5424f32e | 950 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 951 | { |
5424f32e | 952 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
953 | struct xfrm_user_sec_ctx *uctx; |
954 | ||
955 | if (!rt) | |
956 | return 0; | |
957 | ||
5424f32e | 958 | uctx = nla_data(rt); |
df71837d TJ |
959 | return security_xfrm_policy_alloc(pol, uctx); |
960 | } | |
961 | ||
1da177e4 LT |
962 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
963 | int nr) | |
964 | { | |
965 | int i; | |
966 | ||
967 | xp->xfrm_nr = nr; | |
968 | for (i = 0; i < nr; i++, ut++) { | |
969 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
970 | ||
971 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
972 | memcpy(&t->saddr, &ut->saddr, | |
973 | sizeof(xfrm_address_t)); | |
974 | t->reqid = ut->reqid; | |
975 | t->mode = ut->mode; | |
976 | t->share = ut->share; | |
977 | t->optional = ut->optional; | |
978 | t->aalgos = ut->aalgos; | |
979 | t->ealgos = ut->ealgos; | |
980 | t->calgos = ut->calgos; | |
8511d01d | 981 | t->encap_family = ut->family; |
1da177e4 LT |
982 | } |
983 | } | |
984 | ||
b4ad86bf DM |
985 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
986 | { | |
987 | int i; | |
988 | ||
989 | if (nr > XFRM_MAX_DEPTH) | |
990 | return -EINVAL; | |
991 | ||
992 | for (i = 0; i < nr; i++) { | |
993 | /* We never validated the ut->family value, so many | |
994 | * applications simply leave it at zero. The check was | |
995 | * never made and ut->family was ignored because all | |
996 | * templates could be assumed to have the same family as | |
997 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
998 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
999 | */ | |
1000 | if (!ut[i].family) | |
1001 | ut[i].family = family; | |
1002 | ||
1003 | switch (ut[i].family) { | |
1004 | case AF_INET: | |
1005 | break; | |
1006 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1007 | case AF_INET6: | |
1008 | break; | |
1009 | #endif | |
1010 | default: | |
1011 | return -EINVAL; | |
3ff50b79 | 1012 | } |
b4ad86bf DM |
1013 | } |
1014 | ||
1015 | return 0; | |
1016 | } | |
1017 | ||
5424f32e | 1018 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1019 | { |
5424f32e | 1020 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1021 | |
1022 | if (!rt) { | |
1023 | pol->xfrm_nr = 0; | |
1024 | } else { | |
5424f32e TG |
1025 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1026 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1027 | int err; |
1da177e4 | 1028 | |
b4ad86bf DM |
1029 | err = validate_tmpl(nr, utmpl, pol->family); |
1030 | if (err) | |
1031 | return err; | |
1da177e4 | 1032 | |
5424f32e | 1033 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1034 | } |
1035 | return 0; | |
1036 | } | |
1037 | ||
5424f32e | 1038 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1039 | { |
5424f32e | 1040 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1041 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1042 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1043 | int err; |
1044 | ||
1045 | if (rt) { | |
5424f32e | 1046 | upt = nla_data(rt); |
f7b6983f MN |
1047 | type = upt->type; |
1048 | } | |
1049 | ||
1050 | err = verify_policy_type(type); | |
1051 | if (err) | |
1052 | return err; | |
1053 | ||
1054 | *tp = type; | |
1055 | return 0; | |
1056 | } | |
1057 | ||
1da177e4 LT |
1058 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1059 | { | |
1060 | xp->priority = p->priority; | |
1061 | xp->index = p->index; | |
1062 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1063 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1064 | xp->action = p->action; | |
1065 | xp->flags = p->flags; | |
1066 | xp->family = p->sel.family; | |
1067 | /* XXX xp->share = p->share; */ | |
1068 | } | |
1069 | ||
1070 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1071 | { | |
1072 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1073 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1074 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1075 | p->priority = xp->priority; | |
1076 | p->index = xp->index; | |
1077 | p->sel.family = xp->family; | |
1078 | p->dir = dir; | |
1079 | p->action = xp->action; | |
1080 | p->flags = xp->flags; | |
1081 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1082 | } | |
1083 | ||
5424f32e | 1084 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 LT |
1085 | { |
1086 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
1087 | int err; | |
1088 | ||
1089 | if (!xp) { | |
1090 | *errp = -ENOMEM; | |
1091 | return NULL; | |
1092 | } | |
1093 | ||
1094 | copy_from_user_policy(xp, p); | |
df71837d | 1095 | |
35a7aa08 | 1096 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1097 | if (err) |
1098 | goto error; | |
1099 | ||
35a7aa08 TG |
1100 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1101 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1102 | if (err) |
1103 | goto error; | |
1da177e4 LT |
1104 | |
1105 | return xp; | |
f7b6983f MN |
1106 | error: |
1107 | *errp = err; | |
073a3719 | 1108 | xp->dead = 1; |
64c31b3f | 1109 | xfrm_policy_destroy(xp); |
f7b6983f | 1110 | return NULL; |
1da177e4 LT |
1111 | } |
1112 | ||
22e70050 | 1113 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1114 | struct nlattr **attrs) |
1da177e4 | 1115 | { |
7b67c857 | 1116 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1117 | struct xfrm_policy *xp; |
26b15dad | 1118 | struct km_event c; |
1da177e4 LT |
1119 | int err; |
1120 | int excl; | |
1121 | ||
1122 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1123 | if (err) |
1124 | return err; | |
35a7aa08 | 1125 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1126 | if (err) |
1127 | return err; | |
1128 | ||
35a7aa08 | 1129 | xp = xfrm_policy_construct(p, attrs, &err); |
1da177e4 LT |
1130 | if (!xp) |
1131 | return err; | |
1132 | ||
26b15dad JHS |
1133 | /* shouldnt excl be based on nlh flags?? |
1134 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1135 | * in netlink excl is a flag and you wouldnt need | |
1136 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1137 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1138 | err = xfrm_policy_insert(p->dir, xp, excl); | |
ab5f5e8b JL |
1139 | xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid, |
1140 | NETLINK_CB(skb).sid); | |
161a09e7 | 1141 | |
1da177e4 | 1142 | if (err) { |
5f8ac64b | 1143 | security_xfrm_policy_free(xp); |
1da177e4 LT |
1144 | kfree(xp); |
1145 | return err; | |
1146 | } | |
1147 | ||
f60f6b8f | 1148 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1149 | c.seq = nlh->nlmsg_seq; |
1150 | c.pid = nlh->nlmsg_pid; | |
1151 | km_policy_notify(xp, p->dir, &c); | |
1152 | ||
1da177e4 LT |
1153 | xfrm_pol_put(xp); |
1154 | ||
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1159 | { | |
1160 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1161 | int i; | |
1162 | ||
1163 | if (xp->xfrm_nr == 0) | |
1164 | return 0; | |
1165 | ||
1166 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1167 | struct xfrm_user_tmpl *up = &vec[i]; | |
1168 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1169 | ||
1170 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1171 | up->family = kp->encap_family; |
1da177e4 LT |
1172 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1173 | up->reqid = kp->reqid; | |
1174 | up->mode = kp->mode; | |
1175 | up->share = kp->share; | |
1176 | up->optional = kp->optional; | |
1177 | up->aalgos = kp->aalgos; | |
1178 | up->ealgos = kp->ealgos; | |
1179 | up->calgos = kp->calgos; | |
1180 | } | |
df71837d | 1181 | |
c0144bea TG |
1182 | return nla_put(skb, XFRMA_TMPL, |
1183 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1184 | } |
1185 | ||
1186 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1187 | { | |
1188 | if (x->security) { | |
1189 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1190 | } |
1191 | return 0; | |
0d681623 | 1192 | } |
df71837d | 1193 | |
0d681623 SH |
1194 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1195 | { | |
1196 | if (xp->security) { | |
1197 | return copy_sec_ctx(xp->security, skb); | |
1198 | } | |
1199 | return 0; | |
df71837d | 1200 | } |
cfbfd45a TG |
1201 | static inline size_t userpolicy_type_attrsize(void) |
1202 | { | |
1203 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1204 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1205 | #else | |
1206 | return 0; | |
1207 | #endif | |
1208 | } | |
df71837d | 1209 | |
f7b6983f | 1210 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1211 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1212 | { |
c0144bea TG |
1213 | struct xfrm_userpolicy_type upt = { |
1214 | .type = type, | |
1215 | }; | |
f7b6983f | 1216 | |
c0144bea | 1217 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1218 | } |
1219 | ||
1220 | #else | |
b798a9ed | 1221 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1222 | { |
1223 | return 0; | |
1224 | } | |
1225 | #endif | |
1226 | ||
1da177e4 LT |
1227 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1228 | { | |
1229 | struct xfrm_dump_info *sp = ptr; | |
1230 | struct xfrm_userpolicy_info *p; | |
1231 | struct sk_buff *in_skb = sp->in_skb; | |
1232 | struct sk_buff *skb = sp->out_skb; | |
1233 | struct nlmsghdr *nlh; | |
1da177e4 LT |
1234 | |
1235 | if (sp->this_idx < sp->start_idx) | |
1236 | goto out; | |
1237 | ||
79b8b7f4 TG |
1238 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1239 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1240 | if (nlh == NULL) | |
1241 | return -EMSGSIZE; | |
1da177e4 | 1242 | |
7b67c857 | 1243 | p = nlmsg_data(nlh); |
1da177e4 LT |
1244 | copy_to_user_policy(xp, p, dir); |
1245 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1246 | goto nlmsg_failure; | |
df71837d TJ |
1247 | if (copy_to_user_sec_ctx(xp, skb)) |
1248 | goto nlmsg_failure; | |
1459bb36 | 1249 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1250 | goto nlmsg_failure; |
1da177e4 | 1251 | |
9825069d | 1252 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1253 | out: |
1254 | sp->this_idx++; | |
1255 | return 0; | |
1256 | ||
1257 | nlmsg_failure: | |
9825069d TG |
1258 | nlmsg_cancel(skb, nlh); |
1259 | return -EMSGSIZE; | |
1da177e4 LT |
1260 | } |
1261 | ||
1262 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
1263 | { | |
1264 | struct xfrm_dump_info info; | |
1265 | ||
1266 | info.in_skb = cb->skb; | |
1267 | info.out_skb = skb; | |
1268 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1269 | info.nlmsg_flags = NLM_F_MULTI; | |
1270 | info.this_idx = 0; | |
1271 | info.start_idx = cb->args[0]; | |
f7b6983f MN |
1272 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); |
1273 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1274 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); | |
1275 | #endif | |
1da177e4 LT |
1276 | cb->args[0] = info.this_idx; |
1277 | ||
1278 | return skb->len; | |
1279 | } | |
1280 | ||
1281 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1282 | struct xfrm_policy *xp, | |
1283 | int dir, u32 seq) | |
1284 | { | |
1285 | struct xfrm_dump_info info; | |
1286 | struct sk_buff *skb; | |
1287 | ||
7deb2264 | 1288 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1289 | if (!skb) |
1290 | return ERR_PTR(-ENOMEM); | |
1291 | ||
1da177e4 LT |
1292 | info.in_skb = in_skb; |
1293 | info.out_skb = skb; | |
1294 | info.nlmsg_seq = seq; | |
1295 | info.nlmsg_flags = 0; | |
1296 | info.this_idx = info.start_idx = 0; | |
1297 | ||
1298 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1299 | kfree_skb(skb); | |
1300 | return NULL; | |
1301 | } | |
1302 | ||
1303 | return skb; | |
1304 | } | |
1305 | ||
22e70050 | 1306 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1307 | struct nlattr **attrs) |
1da177e4 LT |
1308 | { |
1309 | struct xfrm_policy *xp; | |
1310 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1311 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1312 | int err; |
26b15dad | 1313 | struct km_event c; |
1da177e4 LT |
1314 | int delete; |
1315 | ||
7b67c857 | 1316 | p = nlmsg_data(nlh); |
1da177e4 LT |
1317 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1318 | ||
35a7aa08 | 1319 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1320 | if (err) |
1321 | return err; | |
1322 | ||
1da177e4 LT |
1323 | err = verify_policy_dir(p->dir); |
1324 | if (err) | |
1325 | return err; | |
1326 | ||
1327 | if (p->index) | |
ef41aaa0 | 1328 | xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); |
df71837d | 1329 | else { |
5424f32e | 1330 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1331 | struct xfrm_policy tmp; |
1332 | ||
35a7aa08 | 1333 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1334 | if (err) |
1335 | return err; | |
1336 | ||
1337 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1338 | if (rt) { | |
5424f32e | 1339 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d TJ |
1340 | |
1341 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1342 | return err; | |
1343 | } | |
ef41aaa0 EP |
1344 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1345 | delete, &err); | |
df71837d TJ |
1346 | security_xfrm_policy_free(&tmp); |
1347 | } | |
1da177e4 LT |
1348 | if (xp == NULL) |
1349 | return -ENOENT; | |
1350 | ||
1351 | if (!delete) { | |
1352 | struct sk_buff *resp_skb; | |
1353 | ||
1354 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1355 | if (IS_ERR(resp_skb)) { | |
1356 | err = PTR_ERR(resp_skb); | |
1357 | } else { | |
082a1ad5 TG |
1358 | err = nlmsg_unicast(xfrm_nl, resp_skb, |
1359 | NETLINK_CB(skb).pid); | |
1da177e4 | 1360 | } |
26b15dad | 1361 | } else { |
ab5f5e8b JL |
1362 | xfrm_audit_policy_delete(xp, err ? 0 : 1, |
1363 | NETLINK_CB(skb).loginuid, | |
1364 | NETLINK_CB(skb).sid); | |
13fcfbb0 DM |
1365 | |
1366 | if (err != 0) | |
c8c05a8e | 1367 | goto out; |
13fcfbb0 | 1368 | |
e7443892 | 1369 | c.data.byid = p->index; |
f60f6b8f | 1370 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1371 | c.seq = nlh->nlmsg_seq; |
1372 | c.pid = nlh->nlmsg_pid; | |
1373 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1374 | } |
1375 | ||
c8c05a8e | 1376 | out: |
ef41aaa0 | 1377 | xfrm_pol_put(xp); |
1da177e4 LT |
1378 | return err; |
1379 | } | |
1380 | ||
22e70050 | 1381 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1382 | struct nlattr **attrs) |
1da177e4 | 1383 | { |
26b15dad | 1384 | struct km_event c; |
7b67c857 | 1385 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1386 | struct xfrm_audit audit_info; |
4aa2e62c | 1387 | int err; |
1da177e4 | 1388 | |
161a09e7 JL |
1389 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1390 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1391 | err = xfrm_state_flush(p->proto, &audit_info); |
1392 | if (err) | |
1393 | return err; | |
bf08867f | 1394 | c.data.proto = p->proto; |
f60f6b8f | 1395 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1396 | c.seq = nlh->nlmsg_seq; |
1397 | c.pid = nlh->nlmsg_pid; | |
1398 | km_state_notify(NULL, &c); | |
1399 | ||
1da177e4 LT |
1400 | return 0; |
1401 | } | |
1402 | ||
7deb2264 TG |
1403 | static inline size_t xfrm_aevent_msgsize(void) |
1404 | { | |
1405 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) | |
1406 | + nla_total_size(sizeof(struct xfrm_replay_state)) | |
1407 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) | |
1408 | + nla_total_size(4) /* XFRM_AE_RTHR */ | |
1409 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1410 | } | |
d51d081d JHS |
1411 | |
1412 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1413 | { | |
1414 | struct xfrm_aevent_id *id; | |
1415 | struct nlmsghdr *nlh; | |
d51d081d | 1416 | |
79b8b7f4 TG |
1417 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1418 | if (nlh == NULL) | |
1419 | return -EMSGSIZE; | |
d51d081d | 1420 | |
7b67c857 | 1421 | id = nlmsg_data(nlh); |
2b5f6dcc | 1422 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1423 | id->sa_id.spi = x->id.spi; |
1424 | id->sa_id.family = x->props.family; | |
1425 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1426 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1427 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1428 | id->flags = c->data.aevent; |
1429 | ||
c0144bea TG |
1430 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
1431 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
d51d081d | 1432 | |
c0144bea TG |
1433 | if (id->flags & XFRM_AE_RTHR) |
1434 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1435 | |
c0144bea TG |
1436 | if (id->flags & XFRM_AE_ETHR) |
1437 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1438 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1439 | |
9825069d | 1440 | return nlmsg_end(skb, nlh); |
d51d081d | 1441 | |
c0144bea | 1442 | nla_put_failure: |
9825069d TG |
1443 | nlmsg_cancel(skb, nlh); |
1444 | return -EMSGSIZE; | |
d51d081d JHS |
1445 | } |
1446 | ||
22e70050 | 1447 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1448 | struct nlattr **attrs) |
d51d081d JHS |
1449 | { |
1450 | struct xfrm_state *x; | |
1451 | struct sk_buff *r_skb; | |
1452 | int err; | |
1453 | struct km_event c; | |
7b67c857 | 1454 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1455 | struct xfrm_usersa_id *id = &p->sa_id; |
1456 | ||
7deb2264 | 1457 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1458 | if (r_skb == NULL) |
1459 | return -ENOMEM; | |
1460 | ||
1461 | x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); | |
1462 | if (x == NULL) { | |
b08d5840 | 1463 | kfree_skb(r_skb); |
d51d081d JHS |
1464 | return -ESRCH; |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * XXX: is this lock really needed - none of the other | |
1469 | * gets lock (the concern is things getting updated | |
1470 | * while we are still reading) - jhs | |
1471 | */ | |
1472 | spin_lock_bh(&x->lock); | |
1473 | c.data.aevent = p->flags; | |
1474 | c.seq = nlh->nlmsg_seq; | |
1475 | c.pid = nlh->nlmsg_pid; | |
1476 | ||
1477 | if (build_aevent(r_skb, x, &c) < 0) | |
1478 | BUG(); | |
082a1ad5 | 1479 | err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1480 | spin_unlock_bh(&x->lock); |
1481 | xfrm_state_put(x); | |
1482 | return err; | |
1483 | } | |
1484 | ||
22e70050 | 1485 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1486 | struct nlattr **attrs) |
d51d081d JHS |
1487 | { |
1488 | struct xfrm_state *x; | |
1489 | struct km_event c; | |
1490 | int err = - EINVAL; | |
7b67c857 | 1491 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e TG |
1492 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
1493 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
d51d081d JHS |
1494 | |
1495 | if (!lt && !rp) | |
1496 | return err; | |
1497 | ||
1498 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1499 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1500 | return err; | |
1501 | ||
1502 | x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
1503 | if (x == NULL) | |
1504 | return -ESRCH; | |
1505 | ||
1506 | if (x->km.state != XFRM_STATE_VALID) | |
1507 | goto out; | |
1508 | ||
1509 | spin_lock_bh(&x->lock); | |
35a7aa08 | 1510 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1511 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1512 | |
1513 | c.event = nlh->nlmsg_type; | |
1514 | c.seq = nlh->nlmsg_seq; | |
1515 | c.pid = nlh->nlmsg_pid; | |
1516 | c.data.aevent = XFRM_AE_CU; | |
1517 | km_state_notify(x, &c); | |
1518 | err = 0; | |
1519 | out: | |
1520 | xfrm_state_put(x); | |
1521 | return err; | |
1522 | } | |
1523 | ||
22e70050 | 1524 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1525 | struct nlattr **attrs) |
1da177e4 | 1526 | { |
f7b6983f | 1527 | struct km_event c; |
b798a9ed | 1528 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1529 | int err; |
161a09e7 | 1530 | struct xfrm_audit audit_info; |
f7b6983f | 1531 | |
35a7aa08 | 1532 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1533 | if (err) |
1534 | return err; | |
26b15dad | 1535 | |
161a09e7 JL |
1536 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1537 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1538 | err = xfrm_policy_flush(type, &audit_info); |
1539 | if (err) | |
1540 | return err; | |
f7b6983f | 1541 | c.data.type = type; |
f60f6b8f | 1542 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1543 | c.seq = nlh->nlmsg_seq; |
1544 | c.pid = nlh->nlmsg_pid; | |
1545 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1546 | return 0; |
1547 | } | |
1548 | ||
22e70050 | 1549 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1550 | struct nlattr **attrs) |
6c5c8ca7 JHS |
1551 | { |
1552 | struct xfrm_policy *xp; | |
7b67c857 | 1553 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1554 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1555 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1556 | int err = -ENOENT; |
1557 | ||
35a7aa08 | 1558 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1559 | if (err) |
1560 | return err; | |
1561 | ||
6c5c8ca7 | 1562 | if (p->index) |
ef41aaa0 | 1563 | xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1564 | else { |
5424f32e | 1565 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
6c5c8ca7 JHS |
1566 | struct xfrm_policy tmp; |
1567 | ||
35a7aa08 | 1568 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1569 | if (err) |
1570 | return err; | |
1571 | ||
1572 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1573 | if (rt) { | |
5424f32e | 1574 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 JHS |
1575 | |
1576 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1577 | return err; | |
1578 | } | |
ef41aaa0 EP |
1579 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1580 | 0, &err); | |
6c5c8ca7 JHS |
1581 | security_xfrm_policy_free(&tmp); |
1582 | } | |
1583 | ||
1584 | if (xp == NULL) | |
ef41aaa0 EP |
1585 | return -ENOENT; |
1586 | read_lock(&xp->lock); | |
6c5c8ca7 JHS |
1587 | if (xp->dead) { |
1588 | read_unlock(&xp->lock); | |
1589 | goto out; | |
1590 | } | |
1591 | ||
1592 | read_unlock(&xp->lock); | |
1593 | err = 0; | |
1594 | if (up->hard) { | |
1595 | xfrm_policy_delete(xp, p->dir); | |
ab5f5e8b JL |
1596 | xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid, |
1597 | NETLINK_CB(skb).sid); | |
161a09e7 | 1598 | |
6c5c8ca7 JHS |
1599 | } else { |
1600 | // reset the timers here? | |
1601 | printk("Dont know what to do with soft policy expire\n"); | |
1602 | } | |
1603 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1604 | ||
1605 | out: | |
1606 | xfrm_pol_put(xp); | |
1607 | return err; | |
1608 | } | |
1609 | ||
22e70050 | 1610 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1611 | struct nlattr **attrs) |
53bc6b4d JHS |
1612 | { |
1613 | struct xfrm_state *x; | |
1614 | int err; | |
7b67c857 | 1615 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d JHS |
1616 | struct xfrm_usersa_info *p = &ue->state; |
1617 | ||
1618 | x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); | |
53bc6b4d | 1619 | |
3a765aa5 | 1620 | err = -ENOENT; |
53bc6b4d JHS |
1621 | if (x == NULL) |
1622 | return err; | |
1623 | ||
53bc6b4d | 1624 | spin_lock_bh(&x->lock); |
3a765aa5 | 1625 | err = -EINVAL; |
53bc6b4d JHS |
1626 | if (x->km.state != XFRM_STATE_VALID) |
1627 | goto out; | |
1628 | km_state_expired(x, ue->hard, current->pid); | |
1629 | ||
161a09e7 | 1630 | if (ue->hard) { |
53bc6b4d | 1631 | __xfrm_state_delete(x); |
ab5f5e8b JL |
1632 | xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid, |
1633 | NETLINK_CB(skb).sid); | |
161a09e7 | 1634 | } |
3a765aa5 | 1635 | err = 0; |
53bc6b4d JHS |
1636 | out: |
1637 | spin_unlock_bh(&x->lock); | |
1638 | xfrm_state_put(x); | |
1639 | return err; | |
1640 | } | |
1641 | ||
22e70050 | 1642 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1643 | struct nlattr **attrs) |
980ebd25 JHS |
1644 | { |
1645 | struct xfrm_policy *xp; | |
1646 | struct xfrm_user_tmpl *ut; | |
1647 | int i; | |
5424f32e | 1648 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
980ebd25 | 1649 | |
7b67c857 | 1650 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
980ebd25 JHS |
1651 | struct xfrm_state *x = xfrm_state_alloc(); |
1652 | int err = -ENOMEM; | |
1653 | ||
1654 | if (!x) | |
1655 | return err; | |
1656 | ||
1657 | err = verify_newpolicy_info(&ua->policy); | |
1658 | if (err) { | |
1659 | printk("BAD policy passed\n"); | |
1660 | kfree(x); | |
1661 | return err; | |
1662 | } | |
1663 | ||
1664 | /* build an XP */ | |
5424f32e | 1665 | xp = xfrm_policy_construct(&ua->policy, attrs, &err); |
b4ad86bf | 1666 | if (!xp) { |
980ebd25 JHS |
1667 | kfree(x); |
1668 | return err; | |
1669 | } | |
1670 | ||
1671 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1672 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1673 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1674 | ||
5424f32e | 1675 | ut = nla_data(rt); |
980ebd25 JHS |
1676 | /* extract the templates and for each call km_key */ |
1677 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1678 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1679 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1680 | x->props.mode = t->mode; | |
1681 | x->props.reqid = t->reqid; | |
1682 | x->props.family = ut->family; | |
1683 | t->aalgos = ua->aalgos; | |
1684 | t->ealgos = ua->ealgos; | |
1685 | t->calgos = ua->calgos; | |
1686 | err = km_query(x, t, xp); | |
1687 | ||
1688 | } | |
1689 | ||
1690 | kfree(x); | |
1691 | kfree(xp); | |
1692 | ||
1693 | return 0; | |
1694 | } | |
1695 | ||
5c79de6e | 1696 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 1697 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
5424f32e | 1698 | struct nlattr **attrs, int *num) |
5c79de6e | 1699 | { |
5424f32e | 1700 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
1701 | struct xfrm_user_migrate *um; |
1702 | int i, num_migrate; | |
1703 | ||
5424f32e TG |
1704 | um = nla_data(rt); |
1705 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
1706 | |
1707 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1708 | return -EINVAL; | |
1709 | ||
1710 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1711 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1712 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1713 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1714 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1715 | ||
1716 | ma->proto = um->proto; | |
1717 | ma->mode = um->mode; | |
1718 | ma->reqid = um->reqid; | |
1719 | ||
1720 | ma->old_family = um->old_family; | |
1721 | ma->new_family = um->new_family; | |
1722 | } | |
1723 | ||
1724 | *num = i; | |
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1729 | struct nlattr **attrs) |
5c79de6e | 1730 | { |
7b67c857 | 1731 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e SS |
1732 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
1733 | u8 type; | |
1734 | int err; | |
1735 | int n = 0; | |
1736 | ||
35a7aa08 | 1737 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 1738 | return -EINVAL; |
5c79de6e | 1739 | |
5424f32e | 1740 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
1741 | if (err) |
1742 | return err; | |
1743 | ||
1744 | err = copy_from_user_migrate((struct xfrm_migrate *)m, | |
5424f32e | 1745 | attrs, &n); |
5c79de6e SS |
1746 | if (err) |
1747 | return err; | |
1748 | ||
1749 | if (!n) | |
1750 | return 0; | |
1751 | ||
1752 | xfrm_migrate(&pi->sel, pi->dir, type, m, n); | |
1753 | ||
1754 | return 0; | |
1755 | } | |
1756 | #else | |
1757 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1758 | struct nlattr **attrs) |
5c79de6e SS |
1759 | { |
1760 | return -ENOPROTOOPT; | |
1761 | } | |
1762 | #endif | |
1763 | ||
1764 | #ifdef CONFIG_XFRM_MIGRATE | |
1765 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1766 | { | |
1767 | struct xfrm_user_migrate um; | |
1768 | ||
1769 | memset(&um, 0, sizeof(um)); | |
1770 | um.proto = m->proto; | |
1771 | um.mode = m->mode; | |
1772 | um.reqid = m->reqid; | |
1773 | um.old_family = m->old_family; | |
1774 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1775 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1776 | um.new_family = m->new_family; | |
1777 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1778 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1779 | ||
c0144bea | 1780 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
1781 | } |
1782 | ||
7deb2264 TG |
1783 | static inline size_t xfrm_migrate_msgsize(int num_migrate) |
1784 | { | |
1785 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
1786 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
1787 | + userpolicy_type_attrsize(); | |
1788 | } | |
1789 | ||
5c79de6e SS |
1790 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
1791 | int num_migrate, struct xfrm_selector *sel, | |
1792 | u8 dir, u8 type) | |
1793 | { | |
1794 | struct xfrm_migrate *mp; | |
1795 | struct xfrm_userpolicy_id *pol_id; | |
1796 | struct nlmsghdr *nlh; | |
5c79de6e SS |
1797 | int i; |
1798 | ||
79b8b7f4 TG |
1799 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
1800 | if (nlh == NULL) | |
1801 | return -EMSGSIZE; | |
5c79de6e | 1802 | |
7b67c857 | 1803 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
1804 | /* copy data from selector, dir, and type to the pol_id */ |
1805 | memset(pol_id, 0, sizeof(*pol_id)); | |
1806 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1807 | pol_id->dir = dir; | |
1808 | ||
1809 | if (copy_to_user_policy_type(type, skb) < 0) | |
1810 | goto nlmsg_failure; | |
1811 | ||
1812 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1813 | if (copy_to_user_migrate(mp, skb) < 0) | |
1814 | goto nlmsg_failure; | |
1815 | } | |
1816 | ||
9825069d | 1817 | return nlmsg_end(skb, nlh); |
5c79de6e | 1818 | nlmsg_failure: |
9825069d TG |
1819 | nlmsg_cancel(skb, nlh); |
1820 | return -EMSGSIZE; | |
5c79de6e SS |
1821 | } |
1822 | ||
1823 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1824 | struct xfrm_migrate *m, int num_migrate) | |
1825 | { | |
1826 | struct sk_buff *skb; | |
5c79de6e | 1827 | |
7deb2264 | 1828 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC); |
5c79de6e SS |
1829 | if (skb == NULL) |
1830 | return -ENOMEM; | |
1831 | ||
1832 | /* build migrate */ | |
1833 | if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) | |
1834 | BUG(); | |
1835 | ||
082a1ad5 | 1836 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
1837 | } |
1838 | #else | |
1839 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1840 | struct xfrm_migrate *m, int num_migrate) | |
1841 | { | |
1842 | return -ENOPROTOOPT; | |
1843 | } | |
1844 | #endif | |
d51d081d | 1845 | |
a7bd9a45 | 1846 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
1847 | |
1848 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1849 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1850 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1851 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1852 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1853 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1854 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1855 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1856 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1857 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b TG |
1858 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
1859 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
6c5c8ca7 | 1860 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 1861 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 1862 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
1863 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1864 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 1865 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 1866 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
1867 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
1868 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
1869 | }; |
1870 | ||
492b558b TG |
1871 | #undef XMSGSIZE |
1872 | ||
cf5cb79f | 1873 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
1a6509d9 | 1874 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
1875 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
1876 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
1877 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
1878 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
1879 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
1880 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
1881 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
1882 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
1883 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
1884 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
1885 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
1886 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
1887 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
1888 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
1889 | }; | |
1890 | ||
1da177e4 | 1891 | static struct xfrm_link { |
5424f32e | 1892 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 1893 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
492b558b TG |
1894 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1895 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1896 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1897 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1898 | .dump = xfrm_dump_sa }, | |
1899 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1900 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1901 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1902 | .dump = xfrm_dump_policy }, | |
1903 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
980ebd25 | 1904 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1905 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1906 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1907 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1908 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1909 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1910 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1911 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1912 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 1913 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 1914 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 1915 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
1916 | }; |
1917 | ||
1d00a4eb | 1918 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1919 | { |
35a7aa08 | 1920 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 1921 | struct xfrm_link *link; |
a7bd9a45 | 1922 | int type, err; |
1da177e4 | 1923 | |
1da177e4 | 1924 | type = nlh->nlmsg_type; |
1da177e4 | 1925 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 1926 | return -EINVAL; |
1da177e4 LT |
1927 | |
1928 | type -= XFRM_MSG_BASE; | |
1929 | link = &xfrm_dispatch[type]; | |
1930 | ||
1931 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
1932 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
1933 | return -EPERM; | |
1da177e4 | 1934 | |
492b558b TG |
1935 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1936 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1937 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 1938 | if (link->dump == NULL) |
1d00a4eb | 1939 | return -EINVAL; |
88fc2c84 | 1940 | |
c702e804 | 1941 | return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); |
1da177e4 LT |
1942 | } |
1943 | ||
35a7aa08 | 1944 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 1945 | xfrma_policy); |
a7bd9a45 TG |
1946 | if (err < 0) |
1947 | return err; | |
1da177e4 LT |
1948 | |
1949 | if (link->doit == NULL) | |
1d00a4eb | 1950 | return -EINVAL; |
1da177e4 | 1951 | |
5424f32e | 1952 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
1953 | } |
1954 | ||
cd40b7d3 | 1955 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 1956 | { |
cd40b7d3 DL |
1957 | mutex_lock(&xfrm_cfg_mutex); |
1958 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
1959 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
1960 | } |
1961 | ||
7deb2264 TG |
1962 | static inline size_t xfrm_expire_msgsize(void) |
1963 | { | |
1964 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)); | |
1965 | } | |
1966 | ||
d51d081d | 1967 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1968 | { |
1969 | struct xfrm_user_expire *ue; | |
1970 | struct nlmsghdr *nlh; | |
1da177e4 | 1971 | |
79b8b7f4 TG |
1972 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
1973 | if (nlh == NULL) | |
1974 | return -EMSGSIZE; | |
1da177e4 | 1975 | |
7b67c857 | 1976 | ue = nlmsg_data(nlh); |
1da177e4 | 1977 | copy_to_user_state(x, &ue->state); |
d51d081d | 1978 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 1979 | |
9825069d | 1980 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
1981 | } |
1982 | ||
26b15dad | 1983 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1984 | { |
1985 | struct sk_buff *skb; | |
1986 | ||
7deb2264 | 1987 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
1988 | if (skb == NULL) |
1989 | return -ENOMEM; | |
1990 | ||
d51d081d | 1991 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
1992 | BUG(); |
1993 | ||
082a1ad5 | 1994 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
1995 | } |
1996 | ||
d51d081d JHS |
1997 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
1998 | { | |
1999 | struct sk_buff *skb; | |
d51d081d | 2000 | |
7deb2264 | 2001 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
2002 | if (skb == NULL) |
2003 | return -ENOMEM; | |
2004 | ||
2005 | if (build_aevent(skb, x, c) < 0) | |
2006 | BUG(); | |
2007 | ||
082a1ad5 | 2008 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2009 | } |
2010 | ||
26b15dad JHS |
2011 | static int xfrm_notify_sa_flush(struct km_event *c) |
2012 | { | |
2013 | struct xfrm_usersa_flush *p; | |
2014 | struct nlmsghdr *nlh; | |
2015 | struct sk_buff *skb; | |
7deb2264 | 2016 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2017 | |
7deb2264 | 2018 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2019 | if (skb == NULL) |
2020 | return -ENOMEM; | |
26b15dad | 2021 | |
79b8b7f4 TG |
2022 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2023 | if (nlh == NULL) { | |
2024 | kfree_skb(skb); | |
2025 | return -EMSGSIZE; | |
2026 | } | |
26b15dad | 2027 | |
7b67c857 | 2028 | p = nlmsg_data(nlh); |
bf08867f | 2029 | p->proto = c->data.proto; |
26b15dad | 2030 | |
9825069d | 2031 | nlmsg_end(skb, nlh); |
26b15dad | 2032 | |
082a1ad5 | 2033 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2034 | } |
2035 | ||
7deb2264 | 2036 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2037 | { |
7deb2264 | 2038 | size_t l = 0; |
1a6509d9 HX |
2039 | if (x->aead) |
2040 | l += nla_total_size(aead_len(x->aead)); | |
26b15dad | 2041 | if (x->aalg) |
0f99be0d | 2042 | l += nla_total_size(xfrm_alg_len(x->aalg)); |
26b15dad | 2043 | if (x->ealg) |
0f99be0d | 2044 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2045 | if (x->calg) |
7deb2264 | 2046 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2047 | if (x->encap) |
7deb2264 | 2048 | l += nla_total_size(sizeof(*x->encap)); |
68325d3b HX |
2049 | if (x->security) |
2050 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2051 | x->security->ctx_len); | |
2052 | if (x->coaddr) | |
2053 | l += nla_total_size(sizeof(*x->coaddr)); | |
2054 | ||
d26f3984 HX |
2055 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2056 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2057 | |
2058 | return l; | |
2059 | } | |
2060 | ||
2061 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2062 | { | |
2063 | struct xfrm_usersa_info *p; | |
0603eac0 | 2064 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2065 | struct nlmsghdr *nlh; |
2066 | struct sk_buff *skb; | |
26b15dad | 2067 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2068 | int headlen; |
2069 | ||
2070 | headlen = sizeof(*p); | |
2071 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2072 | len += nla_total_size(headlen); |
0603eac0 HX |
2073 | headlen = sizeof(*id); |
2074 | } | |
7deb2264 | 2075 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2076 | |
7deb2264 | 2077 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2078 | if (skb == NULL) |
2079 | return -ENOMEM; | |
26b15dad | 2080 | |
79b8b7f4 TG |
2081 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2082 | if (nlh == NULL) | |
c0144bea | 2083 | goto nla_put_failure; |
26b15dad | 2084 | |
7b67c857 | 2085 | p = nlmsg_data(nlh); |
0603eac0 | 2086 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2087 | struct nlattr *attr; |
2088 | ||
7b67c857 | 2089 | id = nlmsg_data(nlh); |
0603eac0 HX |
2090 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2091 | id->spi = x->id.spi; | |
2092 | id->family = x->props.family; | |
2093 | id->proto = x->id.proto; | |
2094 | ||
c0144bea TG |
2095 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2096 | if (attr == NULL) | |
2097 | goto nla_put_failure; | |
2098 | ||
2099 | p = nla_data(attr); | |
0603eac0 HX |
2100 | } |
2101 | ||
68325d3b HX |
2102 | if (copy_to_user_state_extra(x, p, skb)) |
2103 | goto nla_put_failure; | |
26b15dad | 2104 | |
9825069d | 2105 | nlmsg_end(skb, nlh); |
26b15dad | 2106 | |
082a1ad5 | 2107 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2108 | |
c0144bea | 2109 | nla_put_failure: |
68325d3b HX |
2110 | /* Somebody screwed up with xfrm_sa_len! */ |
2111 | WARN_ON(1); | |
26b15dad JHS |
2112 | kfree_skb(skb); |
2113 | return -1; | |
2114 | } | |
2115 | ||
2116 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2117 | { | |
2118 | ||
2119 | switch (c->event) { | |
f60f6b8f | 2120 | case XFRM_MSG_EXPIRE: |
26b15dad | 2121 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2122 | case XFRM_MSG_NEWAE: |
2123 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2124 | case XFRM_MSG_DELSA: |
2125 | case XFRM_MSG_UPDSA: | |
2126 | case XFRM_MSG_NEWSA: | |
26b15dad | 2127 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2128 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2129 | return xfrm_notify_sa_flush(c); |
2130 | default: | |
2131 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2132 | break; | |
2133 | } | |
2134 | ||
2135 | return 0; | |
2136 | ||
2137 | } | |
2138 | ||
7deb2264 TG |
2139 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2140 | struct xfrm_policy *xp) | |
2141 | { | |
2142 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2143 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2144 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) | |
2145 | + userpolicy_type_attrsize(); | |
2146 | } | |
2147 | ||
1da177e4 LT |
2148 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2149 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2150 | int dir) | |
2151 | { | |
2152 | struct xfrm_user_acquire *ua; | |
2153 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2154 | __u32 seq = xfrm_get_acqseq(); |
2155 | ||
79b8b7f4 TG |
2156 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2157 | if (nlh == NULL) | |
2158 | return -EMSGSIZE; | |
1da177e4 | 2159 | |
7b67c857 | 2160 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2161 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2162 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2163 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2164 | copy_to_user_policy(xp, &ua->policy, dir); | |
2165 | ua->aalgos = xt->aalgos; | |
2166 | ua->ealgos = xt->ealgos; | |
2167 | ua->calgos = xt->calgos; | |
2168 | ua->seq = x->km.seq = seq; | |
2169 | ||
2170 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2171 | goto nlmsg_failure; | |
0d681623 | 2172 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2173 | goto nlmsg_failure; |
1459bb36 | 2174 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2175 | goto nlmsg_failure; |
1da177e4 | 2176 | |
9825069d | 2177 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2178 | |
2179 | nlmsg_failure: | |
9825069d TG |
2180 | nlmsg_cancel(skb, nlh); |
2181 | return -EMSGSIZE; | |
1da177e4 LT |
2182 | } |
2183 | ||
2184 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2185 | struct xfrm_policy *xp, int dir) | |
2186 | { | |
2187 | struct sk_buff *skb; | |
1da177e4 | 2188 | |
7deb2264 | 2189 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2190 | if (skb == NULL) |
2191 | return -ENOMEM; | |
2192 | ||
2193 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2194 | BUG(); | |
2195 | ||
082a1ad5 | 2196 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2197 | } |
2198 | ||
2199 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2200 | * or more templates. | |
2201 | */ | |
cb969f07 | 2202 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2203 | u8 *data, int len, int *dir) |
2204 | { | |
2205 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
2206 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2207 | struct xfrm_policy *xp; | |
2208 | int nr; | |
2209 | ||
cb969f07 | 2210 | switch (sk->sk_family) { |
1da177e4 LT |
2211 | case AF_INET: |
2212 | if (opt != IP_XFRM_POLICY) { | |
2213 | *dir = -EOPNOTSUPP; | |
2214 | return NULL; | |
2215 | } | |
2216 | break; | |
2217 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2218 | case AF_INET6: | |
2219 | if (opt != IPV6_XFRM_POLICY) { | |
2220 | *dir = -EOPNOTSUPP; | |
2221 | return NULL; | |
2222 | } | |
2223 | break; | |
2224 | #endif | |
2225 | default: | |
2226 | *dir = -EINVAL; | |
2227 | return NULL; | |
2228 | } | |
2229 | ||
2230 | *dir = -EINVAL; | |
2231 | ||
2232 | if (len < sizeof(*p) || | |
2233 | verify_newpolicy_info(p)) | |
2234 | return NULL; | |
2235 | ||
2236 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2237 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2238 | return NULL; |
2239 | ||
a4f1bac6 HX |
2240 | if (p->dir > XFRM_POLICY_OUT) |
2241 | return NULL; | |
2242 | ||
1da177e4 LT |
2243 | xp = xfrm_policy_alloc(GFP_KERNEL); |
2244 | if (xp == NULL) { | |
2245 | *dir = -ENOBUFS; | |
2246 | return NULL; | |
2247 | } | |
2248 | ||
2249 | copy_from_user_policy(xp, p); | |
f7b6983f | 2250 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2251 | copy_templates(xp, ut, nr); |
2252 | ||
2253 | *dir = p->dir; | |
2254 | ||
2255 | return xp; | |
2256 | } | |
2257 | ||
7deb2264 TG |
2258 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2259 | { | |
2260 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2261 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2262 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
2263 | + userpolicy_type_attrsize(); | |
2264 | } | |
2265 | ||
1da177e4 | 2266 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
d51d081d | 2267 | int dir, struct km_event *c) |
1da177e4 LT |
2268 | { |
2269 | struct xfrm_user_polexpire *upe; | |
2270 | struct nlmsghdr *nlh; | |
d51d081d | 2271 | int hard = c->data.hard; |
1da177e4 | 2272 | |
79b8b7f4 TG |
2273 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2274 | if (nlh == NULL) | |
2275 | return -EMSGSIZE; | |
1da177e4 | 2276 | |
7b67c857 | 2277 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2278 | copy_to_user_policy(xp, &upe->pol, dir); |
2279 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2280 | goto nlmsg_failure; | |
df71837d TJ |
2281 | if (copy_to_user_sec_ctx(xp, skb)) |
2282 | goto nlmsg_failure; | |
1459bb36 | 2283 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2284 | goto nlmsg_failure; |
1da177e4 LT |
2285 | upe->hard = !!hard; |
2286 | ||
9825069d | 2287 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2288 | |
2289 | nlmsg_failure: | |
9825069d TG |
2290 | nlmsg_cancel(skb, nlh); |
2291 | return -EMSGSIZE; | |
1da177e4 LT |
2292 | } |
2293 | ||
26b15dad | 2294 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
2295 | { |
2296 | struct sk_buff *skb; | |
1da177e4 | 2297 | |
7deb2264 | 2298 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2299 | if (skb == NULL) |
2300 | return -ENOMEM; | |
2301 | ||
d51d081d | 2302 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2303 | BUG(); |
2304 | ||
082a1ad5 | 2305 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2306 | } |
2307 | ||
26b15dad JHS |
2308 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2309 | { | |
2310 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 2311 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2312 | struct nlmsghdr *nlh; |
2313 | struct sk_buff *skb; | |
7deb2264 | 2314 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2315 | int headlen; |
2316 | ||
2317 | headlen = sizeof(*p); | |
2318 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2319 | len += nla_total_size(headlen); |
0603eac0 HX |
2320 | headlen = sizeof(*id); |
2321 | } | |
cfbfd45a | 2322 | len += userpolicy_type_attrsize(); |
7deb2264 | 2323 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2324 | |
7deb2264 | 2325 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2326 | if (skb == NULL) |
2327 | return -ENOMEM; | |
26b15dad | 2328 | |
79b8b7f4 TG |
2329 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2330 | if (nlh == NULL) | |
2331 | goto nlmsg_failure; | |
26b15dad | 2332 | |
7b67c857 | 2333 | p = nlmsg_data(nlh); |
0603eac0 | 2334 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2335 | struct nlattr *attr; |
2336 | ||
7b67c857 | 2337 | id = nlmsg_data(nlh); |
0603eac0 HX |
2338 | memset(id, 0, sizeof(*id)); |
2339 | id->dir = dir; | |
2340 | if (c->data.byid) | |
2341 | id->index = xp->index; | |
2342 | else | |
2343 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2344 | ||
c0144bea TG |
2345 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2346 | if (attr == NULL) | |
2347 | goto nlmsg_failure; | |
2348 | ||
2349 | p = nla_data(attr); | |
0603eac0 | 2350 | } |
26b15dad | 2351 | |
26b15dad JHS |
2352 | copy_to_user_policy(xp, p, dir); |
2353 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2354 | goto nlmsg_failure; | |
1459bb36 | 2355 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2356 | goto nlmsg_failure; |
26b15dad | 2357 | |
9825069d | 2358 | nlmsg_end(skb, nlh); |
26b15dad | 2359 | |
082a1ad5 | 2360 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2361 | |
2362 | nlmsg_failure: | |
2363 | kfree_skb(skb); | |
2364 | return -1; | |
2365 | } | |
2366 | ||
2367 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2368 | { | |
2369 | struct nlmsghdr *nlh; | |
2370 | struct sk_buff *skb; | |
26b15dad | 2371 | |
7deb2264 | 2372 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2373 | if (skb == NULL) |
2374 | return -ENOMEM; | |
26b15dad | 2375 | |
79b8b7f4 TG |
2376 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2377 | if (nlh == NULL) | |
2378 | goto nlmsg_failure; | |
0c51f53c JHS |
2379 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2380 | goto nlmsg_failure; | |
26b15dad | 2381 | |
9825069d | 2382 | nlmsg_end(skb, nlh); |
26b15dad | 2383 | |
082a1ad5 | 2384 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2385 | |
2386 | nlmsg_failure: | |
2387 | kfree_skb(skb); | |
2388 | return -1; | |
2389 | } | |
2390 | ||
2391 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2392 | { | |
2393 | ||
2394 | switch (c->event) { | |
f60f6b8f HX |
2395 | case XFRM_MSG_NEWPOLICY: |
2396 | case XFRM_MSG_UPDPOLICY: | |
2397 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2398 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2399 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2400 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2401 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2402 | return xfrm_exp_policy_notify(xp, dir, c); |
2403 | default: | |
2404 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2405 | } | |
2406 | ||
2407 | return 0; | |
2408 | ||
2409 | } | |
2410 | ||
7deb2264 TG |
2411 | static inline size_t xfrm_report_msgsize(void) |
2412 | { | |
2413 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2414 | } | |
2415 | ||
97a64b45 MN |
2416 | static int build_report(struct sk_buff *skb, u8 proto, |
2417 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2418 | { | |
2419 | struct xfrm_user_report *ur; | |
2420 | struct nlmsghdr *nlh; | |
97a64b45 | 2421 | |
79b8b7f4 TG |
2422 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2423 | if (nlh == NULL) | |
2424 | return -EMSGSIZE; | |
97a64b45 | 2425 | |
7b67c857 | 2426 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2427 | ur->proto = proto; |
2428 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2429 | ||
2430 | if (addr) | |
c0144bea | 2431 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2432 | |
9825069d | 2433 | return nlmsg_end(skb, nlh); |
97a64b45 | 2434 | |
c0144bea | 2435 | nla_put_failure: |
9825069d TG |
2436 | nlmsg_cancel(skb, nlh); |
2437 | return -EMSGSIZE; | |
97a64b45 MN |
2438 | } |
2439 | ||
2440 | static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, | |
2441 | xfrm_address_t *addr) | |
2442 | { | |
2443 | struct sk_buff *skb; | |
97a64b45 | 2444 | |
7deb2264 | 2445 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2446 | if (skb == NULL) |
2447 | return -ENOMEM; | |
2448 | ||
2449 | if (build_report(skb, proto, sel, addr) < 0) | |
2450 | BUG(); | |
2451 | ||
082a1ad5 | 2452 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2453 | } |
2454 | ||
1da177e4 LT |
2455 | static struct xfrm_mgr netlink_mgr = { |
2456 | .id = "netlink", | |
2457 | .notify = xfrm_send_state_notify, | |
2458 | .acquire = xfrm_send_acquire, | |
2459 | .compile_policy = xfrm_compile_policy, | |
2460 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2461 | .report = xfrm_send_report, |
5c79de6e | 2462 | .migrate = xfrm_send_migrate, |
1da177e4 LT |
2463 | }; |
2464 | ||
2465 | static int __init xfrm_user_init(void) | |
2466 | { | |
be33690d PM |
2467 | struct sock *nlsk; |
2468 | ||
654b32c6 | 2469 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
1da177e4 | 2470 | |
b4b51029 | 2471 | nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2472 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2473 | if (nlsk == NULL) |
1da177e4 | 2474 | return -ENOMEM; |
be33690d | 2475 | rcu_assign_pointer(xfrm_nl, nlsk); |
1da177e4 LT |
2476 | |
2477 | xfrm_register_km(&netlink_mgr); | |
2478 | ||
2479 | return 0; | |
2480 | } | |
2481 | ||
2482 | static void __exit xfrm_user_exit(void) | |
2483 | { | |
be33690d PM |
2484 | struct sock *nlsk = xfrm_nl; |
2485 | ||
1da177e4 | 2486 | xfrm_unregister_km(&netlink_mgr); |
be33690d PM |
2487 | rcu_assign_pointer(xfrm_nl, NULL); |
2488 | synchronize_rcu(); | |
b7c6ba6e | 2489 | netlink_kernel_release(nlsk); |
1da177e4 LT |
2490 | } |
2491 | ||
2492 | module_init(xfrm_user_init); | |
2493 | module_exit(xfrm_user_exit); | |
2494 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2495 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2496 |