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Commit | Line | Data |
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1da177e4 LT |
1 | /* xfrm_user.c: User interface to configure xfrm engine. |
2 | * | |
3 | * Copyright (C) 2002 David S. Miller (davem@redhat.com) | |
4 | * | |
5 | * Changes: | |
6 | * Mitsuru KANDA @USAGI | |
7 | * Kazunori MIYAZAWA @USAGI | |
8 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
9 | * IPv6 support | |
df71837d | 10 | * |
1da177e4 LT |
11 | */ |
12 | ||
9409f38a | 13 | #include <linux/crypto.h> |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/net.h> | |
21 | #include <linux/skbuff.h> | |
1da177e4 LT |
22 | #include <linux/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: | |
1da177e4 | 53 | case XFRMA_ALG_CRYPT: |
1da177e4 | 54 | case XFRMA_ALG_COMP: |
1da177e4 LT |
55 | break; |
56 | ||
57 | default: | |
58 | return -EINVAL; | |
3ff50b79 | 59 | } |
1da177e4 LT |
60 | |
61 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
62 | return 0; | |
63 | } | |
64 | ||
4447bb33 MW |
65 | static int verify_auth_trunc(struct nlattr **attrs) |
66 | { | |
67 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; | |
68 | struct xfrm_algo_auth *algp; | |
69 | ||
70 | if (!rt) | |
71 | return 0; | |
72 | ||
73 | algp = nla_data(rt); | |
74 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) | |
75 | return -EINVAL; | |
76 | ||
77 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
78 | return 0; | |
79 | } | |
80 | ||
1a6509d9 HX |
81 | static int verify_aead(struct nlattr **attrs) |
82 | { | |
83 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
84 | struct xfrm_algo_aead *algp; | |
85 | ||
86 | if (!rt) | |
87 | return 0; | |
88 | ||
89 | algp = nla_data(rt); | |
90 | if (nla_len(rt) < aead_len(algp)) | |
91 | return -EINVAL; | |
92 | ||
93 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
94 | return 0; | |
95 | } | |
96 | ||
5424f32e | 97 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
98 | xfrm_address_t **addrp) |
99 | { | |
5424f32e | 100 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 101 | |
cf5cb79f | 102 | if (rt && addrp) |
5424f32e | 103 | *addrp = nla_data(rt); |
eb2971b6 | 104 | } |
df71837d | 105 | |
5424f32e | 106 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 107 | { |
5424f32e | 108 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 109 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
110 | |
111 | if (!rt) | |
112 | return 0; | |
113 | ||
5424f32e | 114 | uctx = nla_data(rt); |
cf5cb79f | 115 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
116 | return -EINVAL; |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | ||
1da177e4 | 122 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 123 | struct nlattr **attrs) |
1da177e4 LT |
124 | { |
125 | int err; | |
126 | ||
127 | err = -EINVAL; | |
128 | switch (p->family) { | |
129 | case AF_INET: | |
130 | break; | |
131 | ||
132 | case AF_INET6: | |
133 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
134 | break; | |
135 | #else | |
136 | err = -EAFNOSUPPORT; | |
137 | goto out; | |
138 | #endif | |
139 | ||
140 | default: | |
141 | goto out; | |
3ff50b79 | 142 | } |
1da177e4 LT |
143 | |
144 | err = -EINVAL; | |
145 | switch (p->id.proto) { | |
146 | case IPPROTO_AH: | |
4447bb33 MW |
147 | if ((!attrs[XFRMA_ALG_AUTH] && |
148 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 149 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
150 | attrs[XFRMA_ALG_CRYPT] || |
151 | attrs[XFRMA_ALG_COMP]) | |
1da177e4 LT |
152 | goto out; |
153 | break; | |
154 | ||
155 | case IPPROTO_ESP: | |
1a6509d9 HX |
156 | if (attrs[XFRMA_ALG_COMP]) |
157 | goto out; | |
158 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 159 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
160 | !attrs[XFRMA_ALG_CRYPT] && |
161 | !attrs[XFRMA_ALG_AEAD]) | |
162 | goto out; | |
163 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 164 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
165 | attrs[XFRMA_ALG_CRYPT]) && |
166 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 LT |
167 | goto out; |
168 | break; | |
169 | ||
170 | case IPPROTO_COMP: | |
35a7aa08 | 171 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 172 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 173 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 174 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35a7aa08 | 175 | attrs[XFRMA_ALG_CRYPT]) |
1da177e4 LT |
176 | goto out; |
177 | break; | |
178 | ||
e23c7194 MN |
179 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
180 | case IPPROTO_DSTOPTS: | |
181 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
182 | if (attrs[XFRMA_ALG_COMP] || |
183 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 184 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 185 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
186 | attrs[XFRMA_ALG_CRYPT] || |
187 | attrs[XFRMA_ENCAP] || | |
188 | attrs[XFRMA_SEC_CTX] || | |
189 | !attrs[XFRMA_COADDR]) | |
e23c7194 MN |
190 | goto out; |
191 | break; | |
192 | #endif | |
193 | ||
1da177e4 LT |
194 | default: |
195 | goto out; | |
3ff50b79 | 196 | } |
1da177e4 | 197 | |
1a6509d9 HX |
198 | if ((err = verify_aead(attrs))) |
199 | goto out; | |
4447bb33 MW |
200 | if ((err = verify_auth_trunc(attrs))) |
201 | goto out; | |
35a7aa08 | 202 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 203 | goto out; |
35a7aa08 | 204 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 205 | goto out; |
35a7aa08 | 206 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 207 | goto out; |
35a7aa08 | 208 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 209 | goto out; |
1da177e4 LT |
210 | |
211 | err = -EINVAL; | |
212 | switch (p->mode) { | |
7e49e6de MN |
213 | case XFRM_MODE_TRANSPORT: |
214 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 215 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 216 | case XFRM_MODE_BEET: |
1da177e4 LT |
217 | break; |
218 | ||
219 | default: | |
220 | goto out; | |
3ff50b79 | 221 | } |
1da177e4 LT |
222 | |
223 | err = 0; | |
224 | ||
225 | out: | |
226 | return err; | |
227 | } | |
228 | ||
229 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
230 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
5424f32e | 231 | struct nlattr *rta) |
1da177e4 | 232 | { |
1da177e4 LT |
233 | struct xfrm_algo *p, *ualg; |
234 | struct xfrm_algo_desc *algo; | |
235 | ||
236 | if (!rta) | |
237 | return 0; | |
238 | ||
5424f32e | 239 | ualg = nla_data(rta); |
1da177e4 LT |
240 | |
241 | algo = get_byname(ualg->alg_name, 1); | |
242 | if (!algo) | |
243 | return -ENOSYS; | |
244 | *props = algo->desc.sadb_alg_id; | |
245 | ||
0f99be0d | 246 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
247 | if (!p) |
248 | return -ENOMEM; | |
249 | ||
04ff1260 | 250 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
251 | *algpp = p; |
252 | return 0; | |
253 | } | |
254 | ||
4447bb33 MW |
255 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
256 | struct nlattr *rta) | |
257 | { | |
258 | struct xfrm_algo *ualg; | |
259 | struct xfrm_algo_auth *p; | |
260 | struct xfrm_algo_desc *algo; | |
261 | ||
262 | if (!rta) | |
263 | return 0; | |
264 | ||
265 | ualg = nla_data(rta); | |
266 | ||
267 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
268 | if (!algo) | |
269 | return -ENOSYS; | |
270 | *props = algo->desc.sadb_alg_id; | |
271 | ||
272 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
273 | if (!p) | |
274 | return -ENOMEM; | |
275 | ||
276 | strcpy(p->alg_name, algo->name); | |
277 | p->alg_key_len = ualg->alg_key_len; | |
278 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
279 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
280 | ||
281 | *algpp = p; | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
286 | struct nlattr *rta) | |
287 | { | |
288 | struct xfrm_algo_auth *p, *ualg; | |
289 | struct xfrm_algo_desc *algo; | |
290 | ||
291 | if (!rta) | |
292 | return 0; | |
293 | ||
294 | ualg = nla_data(rta); | |
295 | ||
296 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
297 | if (!algo) | |
298 | return -ENOSYS; | |
299 | if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) | |
300 | return -EINVAL; | |
301 | *props = algo->desc.sadb_alg_id; | |
302 | ||
303 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
304 | if (!p) | |
305 | return -ENOMEM; | |
306 | ||
307 | strcpy(p->alg_name, algo->name); | |
308 | if (!p->alg_trunc_len) | |
309 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
310 | ||
311 | *algpp = p; | |
312 | return 0; | |
313 | } | |
314 | ||
1a6509d9 HX |
315 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
316 | struct nlattr *rta) | |
317 | { | |
318 | struct xfrm_algo_aead *p, *ualg; | |
319 | struct xfrm_algo_desc *algo; | |
320 | ||
321 | if (!rta) | |
322 | return 0; | |
323 | ||
324 | ualg = nla_data(rta); | |
325 | ||
326 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
327 | if (!algo) | |
328 | return -ENOSYS; | |
329 | *props = algo->desc.sadb_alg_id; | |
330 | ||
331 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
332 | if (!p) | |
333 | return -ENOMEM; | |
334 | ||
335 | strcpy(p->alg_name, algo->name); | |
336 | *algpp = p; | |
337 | return 0; | |
338 | } | |
339 | ||
661697f7 | 340 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 341 | { |
df71837d TJ |
342 | int len = 0; |
343 | ||
344 | if (xfrm_ctx) { | |
345 | len += sizeof(struct xfrm_user_sec_ctx); | |
346 | len += xfrm_ctx->ctx_len; | |
347 | } | |
348 | return len; | |
349 | } | |
350 | ||
1da177e4 LT |
351 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
352 | { | |
353 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
354 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
355 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
356 | x->props.mode = p->mode; | |
357 | x->props.replay_window = p->replay_window; | |
358 | x->props.reqid = p->reqid; | |
359 | x->props.family = p->family; | |
54489c14 | 360 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 361 | x->props.flags = p->flags; |
196b0036 | 362 | |
ccf9b3b8 | 363 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 364 | x->sel.family = p->family; |
1da177e4 LT |
365 | } |
366 | ||
d51d081d JHS |
367 | /* |
368 | * someday when pfkey also has support, we could have the code | |
369 | * somehow made shareable and move it to xfrm_state.c - JHS | |
370 | * | |
371 | */ | |
5424f32e | 372 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 373 | { |
5424f32e TG |
374 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
375 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
376 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
377 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d JHS |
378 | |
379 | if (rp) { | |
380 | struct xfrm_replay_state *replay; | |
5424f32e | 381 | replay = nla_data(rp); |
d51d081d JHS |
382 | memcpy(&x->replay, replay, sizeof(*replay)); |
383 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
384 | } | |
385 | ||
386 | if (lt) { | |
387 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 388 | ltime = nla_data(lt); |
d51d081d JHS |
389 | x->curlft.bytes = ltime->bytes; |
390 | x->curlft.packets = ltime->packets; | |
391 | x->curlft.add_time = ltime->add_time; | |
392 | x->curlft.use_time = ltime->use_time; | |
393 | } | |
394 | ||
cf5cb79f | 395 | if (et) |
5424f32e | 396 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 397 | |
cf5cb79f | 398 | if (rt) |
5424f32e | 399 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
400 | } |
401 | ||
fc34acd3 AD |
402 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
403 | struct xfrm_usersa_info *p, | |
5424f32e | 404 | struct nlattr **attrs, |
1da177e4 LT |
405 | int *errp) |
406 | { | |
fc34acd3 | 407 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
408 | int err = -ENOMEM; |
409 | ||
410 | if (!x) | |
411 | goto error_no_put; | |
412 | ||
413 | copy_from_user_state(x, p); | |
414 | ||
1a6509d9 HX |
415 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
416 | attrs[XFRMA_ALG_AEAD]))) | |
417 | goto error; | |
4447bb33 MW |
418 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
419 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 420 | goto error; |
4447bb33 MW |
421 | if (!x->props.aalgo) { |
422 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
423 | attrs[XFRMA_ALG_AUTH]))) | |
424 | goto error; | |
425 | } | |
1da177e4 LT |
426 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
427 | xfrm_ealg_get_byname, | |
35a7aa08 | 428 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
429 | goto error; |
430 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
431 | xfrm_calg_get_byname, | |
35a7aa08 | 432 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 433 | goto error; |
fd21150a TG |
434 | |
435 | if (attrs[XFRMA_ENCAP]) { | |
436 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
437 | sizeof(*x->encap), GFP_KERNEL); | |
438 | if (x->encap == NULL) | |
439 | goto error; | |
440 | } | |
441 | ||
442 | if (attrs[XFRMA_COADDR]) { | |
443 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
444 | sizeof(*x->coaddr), GFP_KERNEL); | |
445 | if (x->coaddr == NULL) | |
446 | goto error; | |
447 | } | |
448 | ||
72cb6962 | 449 | err = xfrm_init_state(x); |
1da177e4 LT |
450 | if (err) |
451 | goto error; | |
452 | ||
fd21150a TG |
453 | if (attrs[XFRMA_SEC_CTX] && |
454 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
455 | goto error; |
456 | ||
1da177e4 | 457 | x->km.seq = p->seq; |
b27aeadb | 458 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 459 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 460 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d JHS |
461 | x->preplay.bitmap = 0; |
462 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
463 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
464 | ||
465 | /* override default values from above */ | |
466 | ||
5424f32e | 467 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
468 | |
469 | return x; | |
470 | ||
471 | error: | |
472 | x->km.state = XFRM_STATE_DEAD; | |
473 | xfrm_state_put(x); | |
474 | error_no_put: | |
475 | *errp = err; | |
476 | return NULL; | |
477 | } | |
478 | ||
22e70050 | 479 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 480 | struct nlattr **attrs) |
1da177e4 | 481 | { |
fc34acd3 | 482 | struct net *net = sock_net(skb->sk); |
7b67c857 | 483 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
484 | struct xfrm_state *x; |
485 | int err; | |
26b15dad | 486 | struct km_event c; |
2532386f EP |
487 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
488 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
489 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 490 | |
35a7aa08 | 491 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
492 | if (err) |
493 | return err; | |
494 | ||
fc34acd3 | 495 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
496 | if (!x) |
497 | return err; | |
498 | ||
26b15dad | 499 | xfrm_state_hold(x); |
1da177e4 LT |
500 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
501 | err = xfrm_state_add(x); | |
502 | else | |
503 | err = xfrm_state_update(x); | |
504 | ||
2532386f | 505 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 506 | |
1da177e4 LT |
507 | if (err < 0) { |
508 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 509 | __xfrm_state_put(x); |
7d6dfe1f | 510 | goto out; |
1da177e4 LT |
511 | } |
512 | ||
26b15dad JHS |
513 | c.seq = nlh->nlmsg_seq; |
514 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 515 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
516 | |
517 | km_state_notify(x, &c); | |
7d6dfe1f | 518 | out: |
26b15dad | 519 | xfrm_state_put(x); |
1da177e4 LT |
520 | return err; |
521 | } | |
522 | ||
fc34acd3 AD |
523 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
524 | struct xfrm_usersa_id *p, | |
5424f32e | 525 | struct nlattr **attrs, |
eb2971b6 MN |
526 | int *errp) |
527 | { | |
528 | struct xfrm_state *x = NULL; | |
529 | int err; | |
530 | ||
531 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
532 | err = -ESRCH; | |
fc34acd3 | 533 | x = xfrm_state_lookup(net, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
534 | } else { |
535 | xfrm_address_t *saddr = NULL; | |
536 | ||
35a7aa08 | 537 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
538 | if (!saddr) { |
539 | err = -EINVAL; | |
540 | goto out; | |
541 | } | |
542 | ||
9abbffee | 543 | err = -ESRCH; |
fc34acd3 | 544 | x = xfrm_state_lookup_byaddr(net, &p->daddr, saddr, |
221df1ed | 545 | p->proto, p->family); |
eb2971b6 MN |
546 | } |
547 | ||
548 | out: | |
549 | if (!x && errp) | |
550 | *errp = err; | |
551 | return x; | |
552 | } | |
553 | ||
22e70050 | 554 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 555 | struct nlattr **attrs) |
1da177e4 | 556 | { |
fc34acd3 | 557 | struct net *net = sock_net(skb->sk); |
1da177e4 | 558 | struct xfrm_state *x; |
eb2971b6 | 559 | int err = -ESRCH; |
26b15dad | 560 | struct km_event c; |
7b67c857 | 561 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
2532386f EP |
562 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
563 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
564 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 565 | |
fc34acd3 | 566 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 567 | if (x == NULL) |
eb2971b6 | 568 | return err; |
1da177e4 | 569 | |
6f68dc37 | 570 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
571 | goto out; |
572 | ||
1da177e4 | 573 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
574 | err = -EPERM; |
575 | goto out; | |
1da177e4 LT |
576 | } |
577 | ||
26b15dad | 578 | err = xfrm_state_delete(x); |
161a09e7 | 579 | |
c8c05a8e CZ |
580 | if (err < 0) |
581 | goto out; | |
26b15dad JHS |
582 | |
583 | c.seq = nlh->nlmsg_seq; | |
584 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 585 | c.event = nlh->nlmsg_type; |
26b15dad | 586 | km_state_notify(x, &c); |
1da177e4 | 587 | |
c8c05a8e | 588 | out: |
2532386f | 589 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 590 | xfrm_state_put(x); |
26b15dad | 591 | return err; |
1da177e4 LT |
592 | } |
593 | ||
594 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
595 | { | |
596 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
597 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
598 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
599 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
600 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 601 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
602 | p->mode = x->props.mode; |
603 | p->replay_window = x->props.replay_window; | |
604 | p->reqid = x->props.reqid; | |
605 | p->family = x->props.family; | |
606 | p->flags = x->props.flags; | |
607 | p->seq = x->km.seq; | |
608 | } | |
609 | ||
610 | struct xfrm_dump_info { | |
611 | struct sk_buff *in_skb; | |
612 | struct sk_buff *out_skb; | |
613 | u32 nlmsg_seq; | |
614 | u16 nlmsg_flags; | |
1da177e4 LT |
615 | }; |
616 | ||
c0144bea TG |
617 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
618 | { | |
c0144bea TG |
619 | struct xfrm_user_sec_ctx *uctx; |
620 | struct nlattr *attr; | |
68325d3b | 621 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
622 | |
623 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
624 | if (attr == NULL) | |
625 | return -EMSGSIZE; | |
626 | ||
627 | uctx = nla_data(attr); | |
628 | uctx->exttype = XFRMA_SEC_CTX; | |
629 | uctx->len = ctx_size; | |
630 | uctx->ctx_doi = s->ctx_doi; | |
631 | uctx->ctx_alg = s->ctx_alg; | |
632 | uctx->ctx_len = s->ctx_len; | |
633 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
4447bb33 MW |
638 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
639 | { | |
640 | struct xfrm_algo *algo; | |
641 | struct nlattr *nla; | |
642 | ||
643 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
644 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
645 | if (!nla) | |
646 | return -EMSGSIZE; | |
647 | ||
648 | algo = nla_data(nla); | |
649 | strcpy(algo->alg_name, auth->alg_name); | |
650 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); | |
651 | algo->alg_key_len = auth->alg_key_len; | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
68325d3b HX |
656 | /* Don't change this without updating xfrm_sa_len! */ |
657 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
658 | struct xfrm_usersa_info *p, | |
659 | struct sk_buff *skb) | |
1da177e4 | 660 | { |
1da177e4 LT |
661 | copy_to_user_state(x, p); |
662 | ||
050f009e HX |
663 | if (x->coaddr) |
664 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
665 | ||
666 | if (x->lastused) | |
667 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); | |
050f009e | 668 | |
1a6509d9 HX |
669 | if (x->aead) |
670 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
4447bb33 MW |
671 | if (x->aalg) { |
672 | if (copy_to_user_auth(x->aalg, skb)) | |
673 | goto nla_put_failure; | |
674 | ||
675 | NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC, | |
676 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
677 | } | |
1da177e4 | 678 | if (x->ealg) |
0f99be0d | 679 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
1da177e4 | 680 | if (x->calg) |
c0144bea | 681 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
682 | |
683 | if (x->encap) | |
c0144bea | 684 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 685 | |
c0144bea TG |
686 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
687 | goto nla_put_failure; | |
060f02a3 | 688 | |
68325d3b HX |
689 | return 0; |
690 | ||
691 | nla_put_failure: | |
692 | return -EMSGSIZE; | |
693 | } | |
694 | ||
695 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
696 | { | |
697 | struct xfrm_dump_info *sp = ptr; | |
698 | struct sk_buff *in_skb = sp->in_skb; | |
699 | struct sk_buff *skb = sp->out_skb; | |
700 | struct xfrm_usersa_info *p; | |
701 | struct nlmsghdr *nlh; | |
702 | int err; | |
703 | ||
68325d3b HX |
704 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
705 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
706 | if (nlh == NULL) | |
707 | return -EMSGSIZE; | |
708 | ||
709 | p = nlmsg_data(nlh); | |
710 | ||
711 | err = copy_to_user_state_extra(x, p, skb); | |
712 | if (err) | |
713 | goto nla_put_failure; | |
714 | ||
9825069d | 715 | nlmsg_end(skb, nlh); |
1da177e4 LT |
716 | return 0; |
717 | ||
c0144bea | 718 | nla_put_failure: |
9825069d | 719 | nlmsg_cancel(skb, nlh); |
68325d3b | 720 | return err; |
1da177e4 LT |
721 | } |
722 | ||
4c563f76 TT |
723 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
724 | { | |
725 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
726 | xfrm_state_walk_done(walk); | |
727 | return 0; | |
728 | } | |
729 | ||
1da177e4 LT |
730 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
731 | { | |
fc34acd3 | 732 | struct net *net = sock_net(skb->sk); |
4c563f76 | 733 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
734 | struct xfrm_dump_info info; |
735 | ||
4c563f76 TT |
736 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
737 | sizeof(cb->args) - sizeof(cb->args[0])); | |
738 | ||
1da177e4 LT |
739 | info.in_skb = cb->skb; |
740 | info.out_skb = skb; | |
741 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
742 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
743 | |
744 | if (!cb->args[0]) { | |
745 | cb->args[0] = 1; | |
746 | xfrm_state_walk_init(walk, 0); | |
747 | } | |
748 | ||
fc34acd3 | 749 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
750 | |
751 | return skb->len; | |
752 | } | |
753 | ||
754 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
755 | struct xfrm_state *x, u32 seq) | |
756 | { | |
757 | struct xfrm_dump_info info; | |
758 | struct sk_buff *skb; | |
759 | ||
7deb2264 | 760 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
761 | if (!skb) |
762 | return ERR_PTR(-ENOMEM); | |
763 | ||
1da177e4 LT |
764 | info.in_skb = in_skb; |
765 | info.out_skb = skb; | |
766 | info.nlmsg_seq = seq; | |
767 | info.nlmsg_flags = 0; | |
1da177e4 LT |
768 | |
769 | if (dump_one_state(x, 0, &info)) { | |
770 | kfree_skb(skb); | |
771 | return NULL; | |
772 | } | |
773 | ||
774 | return skb; | |
775 | } | |
776 | ||
7deb2264 TG |
777 | static inline size_t xfrm_spdinfo_msgsize(void) |
778 | { | |
779 | return NLMSG_ALIGN(4) | |
780 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
781 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
782 | } | |
783 | ||
e071041b AD |
784 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
785 | u32 pid, u32 seq, u32 flags) | |
ecfd6b18 | 786 | { |
5a6d3416 JHS |
787 | struct xfrmk_spdinfo si; |
788 | struct xfrmu_spdinfo spc; | |
789 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
790 | struct nlmsghdr *nlh; |
791 | u32 *f; | |
792 | ||
793 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
794 | if (nlh == NULL) /* shouldnt really happen ... */ | |
795 | return -EMSGSIZE; | |
796 | ||
797 | f = nlmsg_data(nlh); | |
798 | *f = flags; | |
e071041b | 799 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
800 | spc.incnt = si.incnt; |
801 | spc.outcnt = si.outcnt; | |
802 | spc.fwdcnt = si.fwdcnt; | |
803 | spc.inscnt = si.inscnt; | |
804 | spc.outscnt = si.outscnt; | |
805 | spc.fwdscnt = si.fwdscnt; | |
806 | sph.spdhcnt = si.spdhcnt; | |
807 | sph.spdhmcnt = si.spdhmcnt; | |
808 | ||
809 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
810 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
811 | |
812 | return nlmsg_end(skb, nlh); | |
813 | ||
814 | nla_put_failure: | |
815 | nlmsg_cancel(skb, nlh); | |
816 | return -EMSGSIZE; | |
817 | } | |
818 | ||
819 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 820 | struct nlattr **attrs) |
ecfd6b18 | 821 | { |
a6483b79 | 822 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 823 | struct sk_buff *r_skb; |
7b67c857 | 824 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
825 | u32 spid = NETLINK_CB(skb).pid; |
826 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 827 | |
7deb2264 | 828 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
829 | if (r_skb == NULL) |
830 | return -ENOMEM; | |
831 | ||
e071041b | 832 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
ecfd6b18 JHS |
833 | BUG(); |
834 | ||
a6483b79 | 835 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
836 | } |
837 | ||
7deb2264 TG |
838 | static inline size_t xfrm_sadinfo_msgsize(void) |
839 | { | |
840 | return NLMSG_ALIGN(4) | |
841 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
842 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
843 | } | |
844 | ||
e071041b AD |
845 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
846 | u32 pid, u32 seq, u32 flags) | |
28d8909b | 847 | { |
af11e316 JHS |
848 | struct xfrmk_sadinfo si; |
849 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
850 | struct nlmsghdr *nlh; |
851 | u32 *f; | |
852 | ||
853 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
854 | if (nlh == NULL) /* shouldnt really happen ... */ | |
855 | return -EMSGSIZE; | |
856 | ||
857 | f = nlmsg_data(nlh); | |
858 | *f = flags; | |
e071041b | 859 | xfrm_sad_getinfo(net, &si); |
28d8909b | 860 | |
af11e316 JHS |
861 | sh.sadhmcnt = si.sadhmcnt; |
862 | sh.sadhcnt = si.sadhcnt; | |
863 | ||
864 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
865 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
866 | |
867 | return nlmsg_end(skb, nlh); | |
868 | ||
869 | nla_put_failure: | |
870 | nlmsg_cancel(skb, nlh); | |
871 | return -EMSGSIZE; | |
872 | } | |
873 | ||
874 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 875 | struct nlattr **attrs) |
28d8909b | 876 | { |
a6483b79 | 877 | struct net *net = sock_net(skb->sk); |
28d8909b | 878 | struct sk_buff *r_skb; |
7b67c857 | 879 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
880 | u32 spid = NETLINK_CB(skb).pid; |
881 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 882 | |
7deb2264 | 883 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
884 | if (r_skb == NULL) |
885 | return -ENOMEM; | |
886 | ||
e071041b | 887 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
28d8909b JHS |
888 | BUG(); |
889 | ||
a6483b79 | 890 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
891 | } |
892 | ||
22e70050 | 893 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 894 | struct nlattr **attrs) |
1da177e4 | 895 | { |
fc34acd3 | 896 | struct net *net = sock_net(skb->sk); |
7b67c857 | 897 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
898 | struct xfrm_state *x; |
899 | struct sk_buff *resp_skb; | |
eb2971b6 | 900 | int err = -ESRCH; |
1da177e4 | 901 | |
fc34acd3 | 902 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
903 | if (x == NULL) |
904 | goto out_noput; | |
905 | ||
906 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
907 | if (IS_ERR(resp_skb)) { | |
908 | err = PTR_ERR(resp_skb); | |
909 | } else { | |
a6483b79 | 910 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
911 | } |
912 | xfrm_state_put(x); | |
913 | out_noput: | |
914 | return err; | |
915 | } | |
916 | ||
917 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
918 | { | |
919 | switch (p->info.id.proto) { | |
920 | case IPPROTO_AH: | |
921 | case IPPROTO_ESP: | |
922 | break; | |
923 | ||
924 | case IPPROTO_COMP: | |
925 | /* IPCOMP spi is 16-bits. */ | |
926 | if (p->max >= 0x10000) | |
927 | return -EINVAL; | |
928 | break; | |
929 | ||
930 | default: | |
931 | return -EINVAL; | |
3ff50b79 | 932 | } |
1da177e4 LT |
933 | |
934 | if (p->min > p->max) | |
935 | return -EINVAL; | |
936 | ||
937 | return 0; | |
938 | } | |
939 | ||
22e70050 | 940 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 941 | struct nlattr **attrs) |
1da177e4 | 942 | { |
fc34acd3 | 943 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
944 | struct xfrm_state *x; |
945 | struct xfrm_userspi_info *p; | |
946 | struct sk_buff *resp_skb; | |
947 | xfrm_address_t *daddr; | |
948 | int family; | |
949 | int err; | |
950 | ||
7b67c857 | 951 | p = nlmsg_data(nlh); |
1da177e4 LT |
952 | err = verify_userspi_info(p); |
953 | if (err) | |
954 | goto out_noput; | |
955 | ||
956 | family = p->info.family; | |
957 | daddr = &p->info.id.daddr; | |
958 | ||
959 | x = NULL; | |
960 | if (p->info.seq) { | |
a6483b79 | 961 | x = xfrm_find_acq_byseq(net, p->info.seq); |
1da177e4 LT |
962 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
963 | xfrm_state_put(x); | |
964 | x = NULL; | |
965 | } | |
966 | } | |
967 | ||
968 | if (!x) | |
a6483b79 | 969 | x = xfrm_find_acq(net, p->info.mode, p->info.reqid, |
1da177e4 LT |
970 | p->info.id.proto, daddr, |
971 | &p->info.saddr, 1, | |
972 | family); | |
973 | err = -ENOENT; | |
974 | if (x == NULL) | |
975 | goto out_noput; | |
976 | ||
658b219e HX |
977 | err = xfrm_alloc_spi(x, p->min, p->max); |
978 | if (err) | |
979 | goto out; | |
1da177e4 | 980 | |
658b219e | 981 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
982 | if (IS_ERR(resp_skb)) { |
983 | err = PTR_ERR(resp_skb); | |
984 | goto out; | |
985 | } | |
986 | ||
a6483b79 | 987 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
988 | |
989 | out: | |
990 | xfrm_state_put(x); | |
991 | out_noput: | |
992 | return err; | |
993 | } | |
994 | ||
b798a9ed | 995 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
996 | { |
997 | switch (dir) { | |
998 | case XFRM_POLICY_IN: | |
999 | case XFRM_POLICY_OUT: | |
1000 | case XFRM_POLICY_FWD: | |
1001 | break; | |
1002 | ||
1003 | default: | |
1004 | return -EINVAL; | |
3ff50b79 | 1005 | } |
1da177e4 LT |
1006 | |
1007 | return 0; | |
1008 | } | |
1009 | ||
b798a9ed | 1010 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1011 | { |
1012 | switch (type) { | |
1013 | case XFRM_POLICY_TYPE_MAIN: | |
1014 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1015 | case XFRM_POLICY_TYPE_SUB: | |
1016 | #endif | |
1017 | break; | |
1018 | ||
1019 | default: | |
1020 | return -EINVAL; | |
3ff50b79 | 1021 | } |
f7b6983f MN |
1022 | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1da177e4 LT |
1026 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1027 | { | |
1028 | switch (p->share) { | |
1029 | case XFRM_SHARE_ANY: | |
1030 | case XFRM_SHARE_SESSION: | |
1031 | case XFRM_SHARE_USER: | |
1032 | case XFRM_SHARE_UNIQUE: | |
1033 | break; | |
1034 | ||
1035 | default: | |
1036 | return -EINVAL; | |
3ff50b79 | 1037 | } |
1da177e4 LT |
1038 | |
1039 | switch (p->action) { | |
1040 | case XFRM_POLICY_ALLOW: | |
1041 | case XFRM_POLICY_BLOCK: | |
1042 | break; | |
1043 | ||
1044 | default: | |
1045 | return -EINVAL; | |
3ff50b79 | 1046 | } |
1da177e4 LT |
1047 | |
1048 | switch (p->sel.family) { | |
1049 | case AF_INET: | |
1050 | break; | |
1051 | ||
1052 | case AF_INET6: | |
1053 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1054 | break; | |
1055 | #else | |
1056 | return -EAFNOSUPPORT; | |
1057 | #endif | |
1058 | ||
1059 | default: | |
1060 | return -EINVAL; | |
3ff50b79 | 1061 | } |
1da177e4 LT |
1062 | |
1063 | return verify_policy_dir(p->dir); | |
1064 | } | |
1065 | ||
5424f32e | 1066 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1067 | { |
5424f32e | 1068 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1069 | struct xfrm_user_sec_ctx *uctx; |
1070 | ||
1071 | if (!rt) | |
1072 | return 0; | |
1073 | ||
5424f32e | 1074 | uctx = nla_data(rt); |
03e1ad7b | 1075 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1076 | } |
1077 | ||
1da177e4 LT |
1078 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1079 | int nr) | |
1080 | { | |
1081 | int i; | |
1082 | ||
1083 | xp->xfrm_nr = nr; | |
1084 | for (i = 0; i < nr; i++, ut++) { | |
1085 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1086 | ||
1087 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1088 | memcpy(&t->saddr, &ut->saddr, | |
1089 | sizeof(xfrm_address_t)); | |
1090 | t->reqid = ut->reqid; | |
1091 | t->mode = ut->mode; | |
1092 | t->share = ut->share; | |
1093 | t->optional = ut->optional; | |
1094 | t->aalgos = ut->aalgos; | |
1095 | t->ealgos = ut->ealgos; | |
1096 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1097 | /* If all masks are ~0, then we allow all algorithms. */ |
1098 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1099 | t->encap_family = ut->family; |
1da177e4 LT |
1100 | } |
1101 | } | |
1102 | ||
b4ad86bf DM |
1103 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1104 | { | |
1105 | int i; | |
1106 | ||
1107 | if (nr > XFRM_MAX_DEPTH) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | for (i = 0; i < nr; i++) { | |
1111 | /* We never validated the ut->family value, so many | |
1112 | * applications simply leave it at zero. The check was | |
1113 | * never made and ut->family was ignored because all | |
1114 | * templates could be assumed to have the same family as | |
1115 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1116 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1117 | */ | |
1118 | if (!ut[i].family) | |
1119 | ut[i].family = family; | |
1120 | ||
1121 | switch (ut[i].family) { | |
1122 | case AF_INET: | |
1123 | break; | |
1124 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1125 | case AF_INET6: | |
1126 | break; | |
1127 | #endif | |
1128 | default: | |
1129 | return -EINVAL; | |
3ff50b79 | 1130 | } |
b4ad86bf DM |
1131 | } |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
5424f32e | 1136 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1137 | { |
5424f32e | 1138 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1139 | |
1140 | if (!rt) { | |
1141 | pol->xfrm_nr = 0; | |
1142 | } else { | |
5424f32e TG |
1143 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1144 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1145 | int err; |
1da177e4 | 1146 | |
b4ad86bf DM |
1147 | err = validate_tmpl(nr, utmpl, pol->family); |
1148 | if (err) | |
1149 | return err; | |
1da177e4 | 1150 | |
5424f32e | 1151 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1152 | } |
1153 | return 0; | |
1154 | } | |
1155 | ||
5424f32e | 1156 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1157 | { |
5424f32e | 1158 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1159 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1160 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1161 | int err; |
1162 | ||
1163 | if (rt) { | |
5424f32e | 1164 | upt = nla_data(rt); |
f7b6983f MN |
1165 | type = upt->type; |
1166 | } | |
1167 | ||
1168 | err = verify_policy_type(type); | |
1169 | if (err) | |
1170 | return err; | |
1171 | ||
1172 | *tp = type; | |
1173 | return 0; | |
1174 | } | |
1175 | ||
1da177e4 LT |
1176 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1177 | { | |
1178 | xp->priority = p->priority; | |
1179 | xp->index = p->index; | |
1180 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1181 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1182 | xp->action = p->action; | |
1183 | xp->flags = p->flags; | |
1184 | xp->family = p->sel.family; | |
1185 | /* XXX xp->share = p->share; */ | |
1186 | } | |
1187 | ||
1188 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1189 | { | |
1190 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1191 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1192 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1193 | p->priority = xp->priority; | |
1194 | p->index = xp->index; | |
1195 | p->sel.family = xp->family; | |
1196 | p->dir = dir; | |
1197 | p->action = xp->action; | |
1198 | p->flags = xp->flags; | |
1199 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1200 | } | |
1201 | ||
fc34acd3 | 1202 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1203 | { |
fc34acd3 | 1204 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1205 | int err; |
1206 | ||
1207 | if (!xp) { | |
1208 | *errp = -ENOMEM; | |
1209 | return NULL; | |
1210 | } | |
1211 | ||
1212 | copy_from_user_policy(xp, p); | |
df71837d | 1213 | |
35a7aa08 | 1214 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1215 | if (err) |
1216 | goto error; | |
1217 | ||
35a7aa08 TG |
1218 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1219 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1220 | if (err) |
1221 | goto error; | |
1da177e4 LT |
1222 | |
1223 | return xp; | |
f7b6983f MN |
1224 | error: |
1225 | *errp = err; | |
12a169e7 | 1226 | xp->walk.dead = 1; |
64c31b3f | 1227 | xfrm_policy_destroy(xp); |
f7b6983f | 1228 | return NULL; |
1da177e4 LT |
1229 | } |
1230 | ||
22e70050 | 1231 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1232 | struct nlattr **attrs) |
1da177e4 | 1233 | { |
fc34acd3 | 1234 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1235 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1236 | struct xfrm_policy *xp; |
26b15dad | 1237 | struct km_event c; |
1da177e4 LT |
1238 | int err; |
1239 | int excl; | |
2532386f EP |
1240 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1241 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1242 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 LT |
1243 | |
1244 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1245 | if (err) |
1246 | return err; | |
35a7aa08 | 1247 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1248 | if (err) |
1249 | return err; | |
1250 | ||
fc34acd3 | 1251 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1252 | if (!xp) |
1253 | return err; | |
1254 | ||
26b15dad JHS |
1255 | /* shouldnt excl be based on nlh flags?? |
1256 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1257 | * in netlink excl is a flag and you wouldnt need | |
1258 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1259 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1260 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2532386f | 1261 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1262 | |
1da177e4 | 1263 | if (err) { |
03e1ad7b | 1264 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1265 | kfree(xp); |
1266 | return err; | |
1267 | } | |
1268 | ||
f60f6b8f | 1269 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1270 | c.seq = nlh->nlmsg_seq; |
1271 | c.pid = nlh->nlmsg_pid; | |
1272 | km_policy_notify(xp, p->dir, &c); | |
1273 | ||
1da177e4 LT |
1274 | xfrm_pol_put(xp); |
1275 | ||
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1280 | { | |
1281 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1282 | int i; | |
1283 | ||
1284 | if (xp->xfrm_nr == 0) | |
1285 | return 0; | |
1286 | ||
1287 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1288 | struct xfrm_user_tmpl *up = &vec[i]; | |
1289 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1290 | ||
1291 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1292 | up->family = kp->encap_family; |
1da177e4 LT |
1293 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1294 | up->reqid = kp->reqid; | |
1295 | up->mode = kp->mode; | |
1296 | up->share = kp->share; | |
1297 | up->optional = kp->optional; | |
1298 | up->aalgos = kp->aalgos; | |
1299 | up->ealgos = kp->ealgos; | |
1300 | up->calgos = kp->calgos; | |
1301 | } | |
df71837d | 1302 | |
c0144bea TG |
1303 | return nla_put(skb, XFRMA_TMPL, |
1304 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1305 | } |
1306 | ||
1307 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1308 | { | |
1309 | if (x->security) { | |
1310 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1311 | } |
1312 | return 0; | |
0d681623 | 1313 | } |
df71837d | 1314 | |
0d681623 SH |
1315 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1316 | { | |
1317 | if (xp->security) { | |
1318 | return copy_sec_ctx(xp->security, skb); | |
1319 | } | |
1320 | return 0; | |
df71837d | 1321 | } |
cfbfd45a TG |
1322 | static inline size_t userpolicy_type_attrsize(void) |
1323 | { | |
1324 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1325 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1326 | #else | |
1327 | return 0; | |
1328 | #endif | |
1329 | } | |
df71837d | 1330 | |
f7b6983f | 1331 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1332 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1333 | { |
c0144bea TG |
1334 | struct xfrm_userpolicy_type upt = { |
1335 | .type = type, | |
1336 | }; | |
f7b6983f | 1337 | |
c0144bea | 1338 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1339 | } |
1340 | ||
1341 | #else | |
b798a9ed | 1342 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1343 | { |
1344 | return 0; | |
1345 | } | |
1346 | #endif | |
1347 | ||
1da177e4 LT |
1348 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1349 | { | |
1350 | struct xfrm_dump_info *sp = ptr; | |
1351 | struct xfrm_userpolicy_info *p; | |
1352 | struct sk_buff *in_skb = sp->in_skb; | |
1353 | struct sk_buff *skb = sp->out_skb; | |
1354 | struct nlmsghdr *nlh; | |
1da177e4 | 1355 | |
79b8b7f4 TG |
1356 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1357 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1358 | if (nlh == NULL) | |
1359 | return -EMSGSIZE; | |
1da177e4 | 1360 | |
7b67c857 | 1361 | p = nlmsg_data(nlh); |
1da177e4 LT |
1362 | copy_to_user_policy(xp, p, dir); |
1363 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1364 | goto nlmsg_failure; | |
df71837d TJ |
1365 | if (copy_to_user_sec_ctx(xp, skb)) |
1366 | goto nlmsg_failure; | |
1459bb36 | 1367 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1368 | goto nlmsg_failure; |
1da177e4 | 1369 | |
9825069d | 1370 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1371 | return 0; |
1372 | ||
1373 | nlmsg_failure: | |
9825069d TG |
1374 | nlmsg_cancel(skb, nlh); |
1375 | return -EMSGSIZE; | |
1da177e4 LT |
1376 | } |
1377 | ||
4c563f76 TT |
1378 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1379 | { | |
1380 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1381 | ||
1382 | xfrm_policy_walk_done(walk); | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1da177e4 LT |
1386 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1387 | { | |
fc34acd3 | 1388 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1389 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1390 | struct xfrm_dump_info info; |
1391 | ||
4c563f76 TT |
1392 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1393 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1394 | ||
1da177e4 LT |
1395 | info.in_skb = cb->skb; |
1396 | info.out_skb = skb; | |
1397 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1398 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1399 | |
1400 | if (!cb->args[0]) { | |
1401 | cb->args[0] = 1; | |
1402 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1403 | } | |
1404 | ||
fc34acd3 | 1405 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1406 | |
1407 | return skb->len; | |
1408 | } | |
1409 | ||
1410 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1411 | struct xfrm_policy *xp, | |
1412 | int dir, u32 seq) | |
1413 | { | |
1414 | struct xfrm_dump_info info; | |
1415 | struct sk_buff *skb; | |
1416 | ||
7deb2264 | 1417 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1418 | if (!skb) |
1419 | return ERR_PTR(-ENOMEM); | |
1420 | ||
1da177e4 LT |
1421 | info.in_skb = in_skb; |
1422 | info.out_skb = skb; | |
1423 | info.nlmsg_seq = seq; | |
1424 | info.nlmsg_flags = 0; | |
1da177e4 LT |
1425 | |
1426 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1427 | kfree_skb(skb); | |
1428 | return NULL; | |
1429 | } | |
1430 | ||
1431 | return skb; | |
1432 | } | |
1433 | ||
22e70050 | 1434 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1435 | struct nlattr **attrs) |
1da177e4 | 1436 | { |
fc34acd3 | 1437 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1438 | struct xfrm_policy *xp; |
1439 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1440 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1441 | int err; |
26b15dad | 1442 | struct km_event c; |
1da177e4 LT |
1443 | int delete; |
1444 | ||
7b67c857 | 1445 | p = nlmsg_data(nlh); |
1da177e4 LT |
1446 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1447 | ||
35a7aa08 | 1448 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1449 | if (err) |
1450 | return err; | |
1451 | ||
1da177e4 LT |
1452 | err = verify_policy_dir(p->dir); |
1453 | if (err) | |
1454 | return err; | |
1455 | ||
1456 | if (p->index) | |
a6483b79 | 1457 | xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err); |
df71837d | 1458 | else { |
5424f32e | 1459 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1460 | struct xfrm_sec_ctx *ctx; |
df71837d | 1461 | |
35a7aa08 | 1462 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1463 | if (err) |
1464 | return err; | |
1465 | ||
2c8dd116 | 1466 | ctx = NULL; |
df71837d | 1467 | if (rt) { |
5424f32e | 1468 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1469 | |
03e1ad7b PM |
1470 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1471 | if (err) | |
df71837d | 1472 | return err; |
2c8dd116 | 1473 | } |
a6483b79 | 1474 | xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, |
ef41aaa0 | 1475 | delete, &err); |
03e1ad7b | 1476 | security_xfrm_policy_free(ctx); |
df71837d | 1477 | } |
1da177e4 LT |
1478 | if (xp == NULL) |
1479 | return -ENOENT; | |
1480 | ||
1481 | if (!delete) { | |
1482 | struct sk_buff *resp_skb; | |
1483 | ||
1484 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1485 | if (IS_ERR(resp_skb)) { | |
1486 | err = PTR_ERR(resp_skb); | |
1487 | } else { | |
a6483b79 | 1488 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1489 | NETLINK_CB(skb).pid); |
1da177e4 | 1490 | } |
26b15dad | 1491 | } else { |
2532386f EP |
1492 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1493 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1494 | u32 sid = NETLINK_CB(skb).sid; | |
1495 | ||
1496 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, | |
1497 | sid); | |
13fcfbb0 DM |
1498 | |
1499 | if (err != 0) | |
c8c05a8e | 1500 | goto out; |
13fcfbb0 | 1501 | |
e7443892 | 1502 | c.data.byid = p->index; |
f60f6b8f | 1503 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1504 | c.seq = nlh->nlmsg_seq; |
1505 | c.pid = nlh->nlmsg_pid; | |
1506 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1507 | } |
1508 | ||
c8c05a8e | 1509 | out: |
ef41aaa0 | 1510 | xfrm_pol_put(xp); |
1da177e4 LT |
1511 | return err; |
1512 | } | |
1513 | ||
22e70050 | 1514 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1515 | struct nlattr **attrs) |
1da177e4 | 1516 | { |
fc34acd3 | 1517 | struct net *net = sock_net(skb->sk); |
26b15dad | 1518 | struct km_event c; |
7b67c857 | 1519 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1520 | struct xfrm_audit audit_info; |
4aa2e62c | 1521 | int err; |
1da177e4 | 1522 | |
161a09e7 | 1523 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1524 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1525 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1526 | err = xfrm_state_flush(net, p->proto, &audit_info); |
4aa2e62c | 1527 | if (err) |
19f4c713 | 1528 | return 0; |
bf08867f | 1529 | c.data.proto = p->proto; |
f60f6b8f | 1530 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1531 | c.seq = nlh->nlmsg_seq; |
1532 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1533 | c.net = net; |
26b15dad JHS |
1534 | km_state_notify(NULL, &c); |
1535 | ||
1da177e4 LT |
1536 | return 0; |
1537 | } | |
1538 | ||
7deb2264 TG |
1539 | static inline size_t xfrm_aevent_msgsize(void) |
1540 | { | |
1541 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) | |
1542 | + nla_total_size(sizeof(struct xfrm_replay_state)) | |
1543 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) | |
1544 | + nla_total_size(4) /* XFRM_AE_RTHR */ | |
1545 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1546 | } | |
d51d081d JHS |
1547 | |
1548 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1549 | { | |
1550 | struct xfrm_aevent_id *id; | |
1551 | struct nlmsghdr *nlh; | |
d51d081d | 1552 | |
79b8b7f4 TG |
1553 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1554 | if (nlh == NULL) | |
1555 | return -EMSGSIZE; | |
d51d081d | 1556 | |
7b67c857 | 1557 | id = nlmsg_data(nlh); |
2b5f6dcc | 1558 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1559 | id->sa_id.spi = x->id.spi; |
1560 | id->sa_id.family = x->props.family; | |
1561 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1562 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1563 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1564 | id->flags = c->data.aevent; |
1565 | ||
c0144bea TG |
1566 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
1567 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
d51d081d | 1568 | |
c0144bea TG |
1569 | if (id->flags & XFRM_AE_RTHR) |
1570 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1571 | |
c0144bea TG |
1572 | if (id->flags & XFRM_AE_ETHR) |
1573 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1574 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1575 | |
9825069d | 1576 | return nlmsg_end(skb, nlh); |
d51d081d | 1577 | |
c0144bea | 1578 | nla_put_failure: |
9825069d TG |
1579 | nlmsg_cancel(skb, nlh); |
1580 | return -EMSGSIZE; | |
d51d081d JHS |
1581 | } |
1582 | ||
22e70050 | 1583 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1584 | struct nlattr **attrs) |
d51d081d | 1585 | { |
fc34acd3 | 1586 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1587 | struct xfrm_state *x; |
1588 | struct sk_buff *r_skb; | |
1589 | int err; | |
1590 | struct km_event c; | |
7b67c857 | 1591 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1592 | struct xfrm_usersa_id *id = &p->sa_id; |
1593 | ||
7deb2264 | 1594 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1595 | if (r_skb == NULL) |
1596 | return -ENOMEM; | |
1597 | ||
a6483b79 | 1598 | x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family); |
d51d081d | 1599 | if (x == NULL) { |
b08d5840 | 1600 | kfree_skb(r_skb); |
d51d081d JHS |
1601 | return -ESRCH; |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * XXX: is this lock really needed - none of the other | |
1606 | * gets lock (the concern is things getting updated | |
1607 | * while we are still reading) - jhs | |
1608 | */ | |
1609 | spin_lock_bh(&x->lock); | |
1610 | c.data.aevent = p->flags; | |
1611 | c.seq = nlh->nlmsg_seq; | |
1612 | c.pid = nlh->nlmsg_pid; | |
1613 | ||
1614 | if (build_aevent(r_skb, x, &c) < 0) | |
1615 | BUG(); | |
a6483b79 | 1616 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1617 | spin_unlock_bh(&x->lock); |
1618 | xfrm_state_put(x); | |
1619 | return err; | |
1620 | } | |
1621 | ||
22e70050 | 1622 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1623 | struct nlattr **attrs) |
d51d081d | 1624 | { |
fc34acd3 | 1625 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1626 | struct xfrm_state *x; |
1627 | struct km_event c; | |
1628 | int err = - EINVAL; | |
7b67c857 | 1629 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e TG |
1630 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
1631 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
d51d081d JHS |
1632 | |
1633 | if (!lt && !rp) | |
1634 | return err; | |
1635 | ||
1636 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1637 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1638 | return err; | |
1639 | ||
fc34acd3 | 1640 | x = xfrm_state_lookup(net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); |
d51d081d JHS |
1641 | if (x == NULL) |
1642 | return -ESRCH; | |
1643 | ||
1644 | if (x->km.state != XFRM_STATE_VALID) | |
1645 | goto out; | |
1646 | ||
1647 | spin_lock_bh(&x->lock); | |
35a7aa08 | 1648 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1649 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1650 | |
1651 | c.event = nlh->nlmsg_type; | |
1652 | c.seq = nlh->nlmsg_seq; | |
1653 | c.pid = nlh->nlmsg_pid; | |
1654 | c.data.aevent = XFRM_AE_CU; | |
1655 | km_state_notify(x, &c); | |
1656 | err = 0; | |
1657 | out: | |
1658 | xfrm_state_put(x); | |
1659 | return err; | |
1660 | } | |
1661 | ||
22e70050 | 1662 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1663 | struct nlattr **attrs) |
1da177e4 | 1664 | { |
fc34acd3 | 1665 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1666 | struct km_event c; |
b798a9ed | 1667 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1668 | int err; |
161a09e7 | 1669 | struct xfrm_audit audit_info; |
f7b6983f | 1670 | |
35a7aa08 | 1671 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1672 | if (err) |
1673 | return err; | |
26b15dad | 1674 | |
161a09e7 | 1675 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1676 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1677 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1678 | err = xfrm_policy_flush(net, type, &audit_info); |
4aa2e62c | 1679 | if (err) |
0dca3a84 | 1680 | return 0; |
f7b6983f | 1681 | c.data.type = type; |
f60f6b8f | 1682 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1683 | c.seq = nlh->nlmsg_seq; |
1684 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1685 | c.net = net; |
26b15dad | 1686 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1687 | return 0; |
1688 | } | |
1689 | ||
22e70050 | 1690 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1691 | struct nlattr **attrs) |
6c5c8ca7 | 1692 | { |
fc34acd3 | 1693 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1694 | struct xfrm_policy *xp; |
7b67c857 | 1695 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1696 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1697 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1698 | int err = -ENOENT; |
1699 | ||
35a7aa08 | 1700 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1701 | if (err) |
1702 | return err; | |
1703 | ||
6c5c8ca7 | 1704 | if (p->index) |
fc34acd3 | 1705 | xp = xfrm_policy_byid(net, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1706 | else { |
5424f32e | 1707 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1708 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1709 | |
35a7aa08 | 1710 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1711 | if (err) |
1712 | return err; | |
1713 | ||
2c8dd116 | 1714 | ctx = NULL; |
6c5c8ca7 | 1715 | if (rt) { |
5424f32e | 1716 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1717 | |
03e1ad7b PM |
1718 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1719 | if (err) | |
6c5c8ca7 | 1720 | return err; |
2c8dd116 | 1721 | } |
fc34acd3 | 1722 | xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, 0, &err); |
03e1ad7b | 1723 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1724 | } |
6c5c8ca7 | 1725 | if (xp == NULL) |
ef41aaa0 | 1726 | return -ENOENT; |
03e1ad7b | 1727 | |
ef41aaa0 | 1728 | read_lock(&xp->lock); |
12a169e7 | 1729 | if (xp->walk.dead) { |
6c5c8ca7 JHS |
1730 | read_unlock(&xp->lock); |
1731 | goto out; | |
1732 | } | |
1733 | ||
1734 | read_unlock(&xp->lock); | |
1735 | err = 0; | |
1736 | if (up->hard) { | |
2532386f EP |
1737 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1738 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1739 | u32 sid = NETLINK_CB(skb).sid; | |
6c5c8ca7 | 1740 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1741 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1742 | |
6c5c8ca7 JHS |
1743 | } else { |
1744 | // reset the timers here? | |
1745 | printk("Dont know what to do with soft policy expire\n"); | |
1746 | } | |
1747 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1748 | ||
1749 | out: | |
1750 | xfrm_pol_put(xp); | |
1751 | return err; | |
1752 | } | |
1753 | ||
22e70050 | 1754 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1755 | struct nlattr **attrs) |
53bc6b4d | 1756 | { |
fc34acd3 | 1757 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1758 | struct xfrm_state *x; |
1759 | int err; | |
7b67c857 | 1760 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d JHS |
1761 | struct xfrm_usersa_info *p = &ue->state; |
1762 | ||
fc34acd3 | 1763 | x = xfrm_state_lookup(net, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1764 | |
3a765aa5 | 1765 | err = -ENOENT; |
53bc6b4d JHS |
1766 | if (x == NULL) |
1767 | return err; | |
1768 | ||
53bc6b4d | 1769 | spin_lock_bh(&x->lock); |
3a765aa5 | 1770 | err = -EINVAL; |
53bc6b4d JHS |
1771 | if (x->km.state != XFRM_STATE_VALID) |
1772 | goto out; | |
1773 | km_state_expired(x, ue->hard, current->pid); | |
1774 | ||
161a09e7 | 1775 | if (ue->hard) { |
2532386f EP |
1776 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1777 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1778 | u32 sid = NETLINK_CB(skb).sid; | |
53bc6b4d | 1779 | __xfrm_state_delete(x); |
2532386f | 1780 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1781 | } |
3a765aa5 | 1782 | err = 0; |
53bc6b4d JHS |
1783 | out: |
1784 | spin_unlock_bh(&x->lock); | |
1785 | xfrm_state_put(x); | |
1786 | return err; | |
1787 | } | |
1788 | ||
22e70050 | 1789 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1790 | struct nlattr **attrs) |
980ebd25 | 1791 | { |
fc34acd3 | 1792 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1793 | struct xfrm_policy *xp; |
1794 | struct xfrm_user_tmpl *ut; | |
1795 | int i; | |
5424f32e | 1796 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
980ebd25 | 1797 | |
7b67c857 | 1798 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1799 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1800 | int err = -ENOMEM; |
1801 | ||
1802 | if (!x) | |
d8eb9307 | 1803 | goto nomem; |
980ebd25 JHS |
1804 | |
1805 | err = verify_newpolicy_info(&ua->policy); | |
d8eb9307 IJ |
1806 | if (err) |
1807 | goto bad_policy; | |
980ebd25 JHS |
1808 | |
1809 | /* build an XP */ | |
fc34acd3 | 1810 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
1811 | if (!xp) |
1812 | goto free_state; | |
980ebd25 JHS |
1813 | |
1814 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1815 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1816 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1817 | ||
5424f32e | 1818 | ut = nla_data(rt); |
980ebd25 JHS |
1819 | /* extract the templates and for each call km_key */ |
1820 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1821 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1822 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1823 | x->props.mode = t->mode; | |
1824 | x->props.reqid = t->reqid; | |
1825 | x->props.family = ut->family; | |
1826 | t->aalgos = ua->aalgos; | |
1827 | t->ealgos = ua->ealgos; | |
1828 | t->calgos = ua->calgos; | |
1829 | err = km_query(x, t, xp); | |
1830 | ||
1831 | } | |
1832 | ||
1833 | kfree(x); | |
1834 | kfree(xp); | |
1835 | ||
1836 | return 0; | |
d8eb9307 IJ |
1837 | |
1838 | bad_policy: | |
1839 | printk("BAD policy passed\n"); | |
1840 | free_state: | |
1841 | kfree(x); | |
1842 | nomem: | |
1843 | return err; | |
980ebd25 JHS |
1844 | } |
1845 | ||
5c79de6e | 1846 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 1847 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 1848 | struct xfrm_kmaddress *k, |
5424f32e | 1849 | struct nlattr **attrs, int *num) |
5c79de6e | 1850 | { |
5424f32e | 1851 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
1852 | struct xfrm_user_migrate *um; |
1853 | int i, num_migrate; | |
1854 | ||
13c1d189 AE |
1855 | if (k != NULL) { |
1856 | struct xfrm_user_kmaddress *uk; | |
1857 | ||
1858 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
1859 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
1860 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
1861 | k->family = uk->family; | |
1862 | k->reserved = uk->reserved; | |
1863 | } | |
1864 | ||
5424f32e TG |
1865 | um = nla_data(rt); |
1866 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
1867 | |
1868 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1869 | return -EINVAL; | |
1870 | ||
1871 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1872 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1873 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1874 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1875 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1876 | ||
1877 | ma->proto = um->proto; | |
1878 | ma->mode = um->mode; | |
1879 | ma->reqid = um->reqid; | |
1880 | ||
1881 | ma->old_family = um->old_family; | |
1882 | ma->new_family = um->new_family; | |
1883 | } | |
1884 | ||
1885 | *num = i; | |
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1890 | struct nlattr **attrs) |
5c79de6e | 1891 | { |
7b67c857 | 1892 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 1893 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 1894 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
1895 | u8 type; |
1896 | int err; | |
1897 | int n = 0; | |
1898 | ||
35a7aa08 | 1899 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 1900 | return -EINVAL; |
5c79de6e | 1901 | |
13c1d189 AE |
1902 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
1903 | ||
5424f32e | 1904 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
1905 | if (err) |
1906 | return err; | |
1907 | ||
13c1d189 | 1908 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
1909 | if (err) |
1910 | return err; | |
1911 | ||
1912 | if (!n) | |
1913 | return 0; | |
1914 | ||
13c1d189 | 1915 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
1916 | |
1917 | return 0; | |
1918 | } | |
1919 | #else | |
1920 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1921 | struct nlattr **attrs) |
5c79de6e SS |
1922 | { |
1923 | return -ENOPROTOOPT; | |
1924 | } | |
1925 | #endif | |
1926 | ||
1927 | #ifdef CONFIG_XFRM_MIGRATE | |
1928 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1929 | { | |
1930 | struct xfrm_user_migrate um; | |
1931 | ||
1932 | memset(&um, 0, sizeof(um)); | |
1933 | um.proto = m->proto; | |
1934 | um.mode = m->mode; | |
1935 | um.reqid = m->reqid; | |
1936 | um.old_family = m->old_family; | |
1937 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1938 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1939 | um.new_family = m->new_family; | |
1940 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1941 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1942 | ||
c0144bea | 1943 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
1944 | } |
1945 | ||
13c1d189 AE |
1946 | static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb) |
1947 | { | |
1948 | struct xfrm_user_kmaddress uk; | |
1949 | ||
1950 | memset(&uk, 0, sizeof(uk)); | |
1951 | uk.family = k->family; | |
1952 | uk.reserved = k->reserved; | |
1953 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 1954 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
1955 | |
1956 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
1957 | } | |
1958 | ||
1959 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
1960 | { |
1961 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
1962 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
1963 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
1964 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
1965 | } |
1966 | ||
5c79de6e | 1967 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
13c1d189 AE |
1968 | int num_migrate, struct xfrm_kmaddress *k, |
1969 | struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e SS |
1970 | { |
1971 | struct xfrm_migrate *mp; | |
1972 | struct xfrm_userpolicy_id *pol_id; | |
1973 | struct nlmsghdr *nlh; | |
5c79de6e SS |
1974 | int i; |
1975 | ||
79b8b7f4 TG |
1976 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
1977 | if (nlh == NULL) | |
1978 | return -EMSGSIZE; | |
5c79de6e | 1979 | |
7b67c857 | 1980 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
1981 | /* copy data from selector, dir, and type to the pol_id */ |
1982 | memset(pol_id, 0, sizeof(*pol_id)); | |
1983 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1984 | pol_id->dir = dir; | |
1985 | ||
13c1d189 AE |
1986 | if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) |
1987 | goto nlmsg_failure; | |
1988 | ||
5c79de6e SS |
1989 | if (copy_to_user_policy_type(type, skb) < 0) |
1990 | goto nlmsg_failure; | |
1991 | ||
1992 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1993 | if (copy_to_user_migrate(mp, skb) < 0) | |
1994 | goto nlmsg_failure; | |
1995 | } | |
1996 | ||
9825069d | 1997 | return nlmsg_end(skb, nlh); |
5c79de6e | 1998 | nlmsg_failure: |
9825069d TG |
1999 | nlmsg_cancel(skb, nlh); |
2000 | return -EMSGSIZE; | |
5c79de6e SS |
2001 | } |
2002 | ||
2003 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
2004 | struct xfrm_migrate *m, int num_migrate, |
2005 | struct xfrm_kmaddress *k) | |
5c79de6e | 2006 | { |
a6483b79 | 2007 | struct net *net = &init_net; |
5c79de6e | 2008 | struct sk_buff *skb; |
5c79de6e | 2009 | |
13c1d189 | 2010 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2011 | if (skb == NULL) |
2012 | return -ENOMEM; | |
2013 | ||
2014 | /* build migrate */ | |
13c1d189 | 2015 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2016 | BUG(); |
2017 | ||
a6483b79 | 2018 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2019 | } |
2020 | #else | |
2021 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
2022 | struct xfrm_migrate *m, int num_migrate, |
2023 | struct xfrm_kmaddress *k) | |
5c79de6e SS |
2024 | { |
2025 | return -ENOPROTOOPT; | |
2026 | } | |
2027 | #endif | |
d51d081d | 2028 | |
a7bd9a45 | 2029 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2030 | |
2031 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2032 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2033 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2034 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2035 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2036 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2037 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2038 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2039 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2040 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2041 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2042 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2043 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2044 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2045 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2046 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2047 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2048 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2049 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2050 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2051 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2052 | }; |
2053 | ||
492b558b TG |
2054 | #undef XMSGSIZE |
2055 | ||
cf5cb79f | 2056 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2057 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2058 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2059 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2060 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2061 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2062 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2063 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2064 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2065 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2066 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2067 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2068 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2069 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2070 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2071 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2072 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2073 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2074 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2075 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2076 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
cf5cb79f TG |
2077 | }; |
2078 | ||
1da177e4 | 2079 | static struct xfrm_link { |
5424f32e | 2080 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2081 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2082 | int (*done)(struct netlink_callback *); |
492b558b TG |
2083 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2084 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2085 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2086 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2087 | .dump = xfrm_dump_sa, |
2088 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2089 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2090 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2091 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2092 | .dump = xfrm_dump_policy, |
2093 | .done = xfrm_dump_policy_done }, | |
492b558b | 2094 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2095 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2096 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2097 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2098 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2099 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2100 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2101 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2102 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2103 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2104 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2105 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2106 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2107 | }; |
2108 | ||
1d00a4eb | 2109 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2110 | { |
a6483b79 | 2111 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2112 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2113 | struct xfrm_link *link; |
a7bd9a45 | 2114 | int type, err; |
1da177e4 | 2115 | |
1da177e4 | 2116 | type = nlh->nlmsg_type; |
1da177e4 | 2117 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2118 | return -EINVAL; |
1da177e4 LT |
2119 | |
2120 | type -= XFRM_MSG_BASE; | |
2121 | link = &xfrm_dispatch[type]; | |
2122 | ||
2123 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
2124 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
2125 | return -EPERM; | |
1da177e4 | 2126 | |
492b558b TG |
2127 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2128 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
2129 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 2130 | if (link->dump == NULL) |
1d00a4eb | 2131 | return -EINVAL; |
88fc2c84 | 2132 | |
a6483b79 | 2133 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done); |
1da177e4 LT |
2134 | } |
2135 | ||
35a7aa08 | 2136 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2137 | xfrma_policy); |
a7bd9a45 TG |
2138 | if (err < 0) |
2139 | return err; | |
1da177e4 LT |
2140 | |
2141 | if (link->doit == NULL) | |
1d00a4eb | 2142 | return -EINVAL; |
1da177e4 | 2143 | |
5424f32e | 2144 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2145 | } |
2146 | ||
cd40b7d3 | 2147 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2148 | { |
cd40b7d3 DL |
2149 | mutex_lock(&xfrm_cfg_mutex); |
2150 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2151 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2152 | } |
2153 | ||
7deb2264 TG |
2154 | static inline size_t xfrm_expire_msgsize(void) |
2155 | { | |
2156 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)); | |
2157 | } | |
2158 | ||
d51d081d | 2159 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
2160 | { |
2161 | struct xfrm_user_expire *ue; | |
2162 | struct nlmsghdr *nlh; | |
1da177e4 | 2163 | |
79b8b7f4 TG |
2164 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2165 | if (nlh == NULL) | |
2166 | return -EMSGSIZE; | |
1da177e4 | 2167 | |
7b67c857 | 2168 | ue = nlmsg_data(nlh); |
1da177e4 | 2169 | copy_to_user_state(x, &ue->state); |
d51d081d | 2170 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2171 | |
9825069d | 2172 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2173 | } |
2174 | ||
26b15dad | 2175 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 | 2176 | { |
fc34acd3 | 2177 | struct net *net = xs_net(x); |
1da177e4 LT |
2178 | struct sk_buff *skb; |
2179 | ||
7deb2264 | 2180 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2181 | if (skb == NULL) |
2182 | return -ENOMEM; | |
2183 | ||
d51d081d | 2184 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
2185 | BUG(); |
2186 | ||
a6483b79 | 2187 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2188 | } |
2189 | ||
d51d081d JHS |
2190 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
2191 | { | |
fc34acd3 | 2192 | struct net *net = xs_net(x); |
d51d081d | 2193 | struct sk_buff *skb; |
d51d081d | 2194 | |
7deb2264 | 2195 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
2196 | if (skb == NULL) |
2197 | return -ENOMEM; | |
2198 | ||
2199 | if (build_aevent(skb, x, c) < 0) | |
2200 | BUG(); | |
2201 | ||
a6483b79 | 2202 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2203 | } |
2204 | ||
26b15dad JHS |
2205 | static int xfrm_notify_sa_flush(struct km_event *c) |
2206 | { | |
7067802e | 2207 | struct net *net = c->net; |
26b15dad JHS |
2208 | struct xfrm_usersa_flush *p; |
2209 | struct nlmsghdr *nlh; | |
2210 | struct sk_buff *skb; | |
7deb2264 | 2211 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2212 | |
7deb2264 | 2213 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2214 | if (skb == NULL) |
2215 | return -ENOMEM; | |
26b15dad | 2216 | |
79b8b7f4 TG |
2217 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2218 | if (nlh == NULL) { | |
2219 | kfree_skb(skb); | |
2220 | return -EMSGSIZE; | |
2221 | } | |
26b15dad | 2222 | |
7b67c857 | 2223 | p = nlmsg_data(nlh); |
bf08867f | 2224 | p->proto = c->data.proto; |
26b15dad | 2225 | |
9825069d | 2226 | nlmsg_end(skb, nlh); |
26b15dad | 2227 | |
a6483b79 | 2228 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2229 | } |
2230 | ||
7deb2264 | 2231 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2232 | { |
7deb2264 | 2233 | size_t l = 0; |
1a6509d9 HX |
2234 | if (x->aead) |
2235 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2236 | if (x->aalg) { |
2237 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2238 | (x->aalg->alg_key_len + 7) / 8); | |
2239 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2240 | } | |
26b15dad | 2241 | if (x->ealg) |
0f99be0d | 2242 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2243 | if (x->calg) |
7deb2264 | 2244 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2245 | if (x->encap) |
7deb2264 | 2246 | l += nla_total_size(sizeof(*x->encap)); |
68325d3b HX |
2247 | if (x->security) |
2248 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2249 | x->security->ctx_len); | |
2250 | if (x->coaddr) | |
2251 | l += nla_total_size(sizeof(*x->coaddr)); | |
2252 | ||
d26f3984 HX |
2253 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2254 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2255 | |
2256 | return l; | |
2257 | } | |
2258 | ||
2259 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2260 | { | |
fc34acd3 | 2261 | struct net *net = xs_net(x); |
26b15dad | 2262 | struct xfrm_usersa_info *p; |
0603eac0 | 2263 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2264 | struct nlmsghdr *nlh; |
2265 | struct sk_buff *skb; | |
26b15dad | 2266 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2267 | int headlen; |
2268 | ||
2269 | headlen = sizeof(*p); | |
2270 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2271 | len += nla_total_size(headlen); |
0603eac0 HX |
2272 | headlen = sizeof(*id); |
2273 | } | |
7deb2264 | 2274 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2275 | |
7deb2264 | 2276 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2277 | if (skb == NULL) |
2278 | return -ENOMEM; | |
26b15dad | 2279 | |
79b8b7f4 TG |
2280 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2281 | if (nlh == NULL) | |
c0144bea | 2282 | goto nla_put_failure; |
26b15dad | 2283 | |
7b67c857 | 2284 | p = nlmsg_data(nlh); |
0603eac0 | 2285 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2286 | struct nlattr *attr; |
2287 | ||
7b67c857 | 2288 | id = nlmsg_data(nlh); |
0603eac0 HX |
2289 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2290 | id->spi = x->id.spi; | |
2291 | id->family = x->props.family; | |
2292 | id->proto = x->id.proto; | |
2293 | ||
c0144bea TG |
2294 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2295 | if (attr == NULL) | |
2296 | goto nla_put_failure; | |
2297 | ||
2298 | p = nla_data(attr); | |
0603eac0 HX |
2299 | } |
2300 | ||
68325d3b HX |
2301 | if (copy_to_user_state_extra(x, p, skb)) |
2302 | goto nla_put_failure; | |
26b15dad | 2303 | |
9825069d | 2304 | nlmsg_end(skb, nlh); |
26b15dad | 2305 | |
a6483b79 | 2306 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2307 | |
c0144bea | 2308 | nla_put_failure: |
68325d3b HX |
2309 | /* Somebody screwed up with xfrm_sa_len! */ |
2310 | WARN_ON(1); | |
26b15dad JHS |
2311 | kfree_skb(skb); |
2312 | return -1; | |
2313 | } | |
2314 | ||
2315 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2316 | { | |
2317 | ||
2318 | switch (c->event) { | |
f60f6b8f | 2319 | case XFRM_MSG_EXPIRE: |
26b15dad | 2320 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2321 | case XFRM_MSG_NEWAE: |
2322 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2323 | case XFRM_MSG_DELSA: |
2324 | case XFRM_MSG_UPDSA: | |
2325 | case XFRM_MSG_NEWSA: | |
26b15dad | 2326 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2327 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2328 | return xfrm_notify_sa_flush(c); |
2329 | default: | |
2330 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2331 | break; | |
2332 | } | |
2333 | ||
2334 | return 0; | |
2335 | ||
2336 | } | |
2337 | ||
7deb2264 TG |
2338 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2339 | struct xfrm_policy *xp) | |
2340 | { | |
2341 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2342 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2343 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) | |
2344 | + userpolicy_type_attrsize(); | |
2345 | } | |
2346 | ||
1da177e4 LT |
2347 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2348 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2349 | int dir) | |
2350 | { | |
2351 | struct xfrm_user_acquire *ua; | |
2352 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2353 | __u32 seq = xfrm_get_acqseq(); |
2354 | ||
79b8b7f4 TG |
2355 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2356 | if (nlh == NULL) | |
2357 | return -EMSGSIZE; | |
1da177e4 | 2358 | |
7b67c857 | 2359 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2360 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2361 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2362 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2363 | copy_to_user_policy(xp, &ua->policy, dir); | |
2364 | ua->aalgos = xt->aalgos; | |
2365 | ua->ealgos = xt->ealgos; | |
2366 | ua->calgos = xt->calgos; | |
2367 | ua->seq = x->km.seq = seq; | |
2368 | ||
2369 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2370 | goto nlmsg_failure; | |
0d681623 | 2371 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2372 | goto nlmsg_failure; |
1459bb36 | 2373 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2374 | goto nlmsg_failure; |
1da177e4 | 2375 | |
9825069d | 2376 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2377 | |
2378 | nlmsg_failure: | |
9825069d TG |
2379 | nlmsg_cancel(skb, nlh); |
2380 | return -EMSGSIZE; | |
1da177e4 LT |
2381 | } |
2382 | ||
2383 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2384 | struct xfrm_policy *xp, int dir) | |
2385 | { | |
a6483b79 | 2386 | struct net *net = xs_net(x); |
1da177e4 | 2387 | struct sk_buff *skb; |
1da177e4 | 2388 | |
7deb2264 | 2389 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2390 | if (skb == NULL) |
2391 | return -ENOMEM; | |
2392 | ||
2393 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2394 | BUG(); | |
2395 | ||
a6483b79 | 2396 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2397 | } |
2398 | ||
2399 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2400 | * or more templates. | |
2401 | */ | |
cb969f07 | 2402 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2403 | u8 *data, int len, int *dir) |
2404 | { | |
fc34acd3 | 2405 | struct net *net = sock_net(sk); |
1da177e4 LT |
2406 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2407 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2408 | struct xfrm_policy *xp; | |
2409 | int nr; | |
2410 | ||
cb969f07 | 2411 | switch (sk->sk_family) { |
1da177e4 LT |
2412 | case AF_INET: |
2413 | if (opt != IP_XFRM_POLICY) { | |
2414 | *dir = -EOPNOTSUPP; | |
2415 | return NULL; | |
2416 | } | |
2417 | break; | |
2418 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2419 | case AF_INET6: | |
2420 | if (opt != IPV6_XFRM_POLICY) { | |
2421 | *dir = -EOPNOTSUPP; | |
2422 | return NULL; | |
2423 | } | |
2424 | break; | |
2425 | #endif | |
2426 | default: | |
2427 | *dir = -EINVAL; | |
2428 | return NULL; | |
2429 | } | |
2430 | ||
2431 | *dir = -EINVAL; | |
2432 | ||
2433 | if (len < sizeof(*p) || | |
2434 | verify_newpolicy_info(p)) | |
2435 | return NULL; | |
2436 | ||
2437 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2438 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2439 | return NULL; |
2440 | ||
a4f1bac6 HX |
2441 | if (p->dir > XFRM_POLICY_OUT) |
2442 | return NULL; | |
2443 | ||
fc34acd3 | 2444 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2445 | if (xp == NULL) { |
2446 | *dir = -ENOBUFS; | |
2447 | return NULL; | |
2448 | } | |
2449 | ||
2450 | copy_from_user_policy(xp, p); | |
f7b6983f | 2451 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2452 | copy_templates(xp, ut, nr); |
2453 | ||
2454 | *dir = p->dir; | |
2455 | ||
2456 | return xp; | |
2457 | } | |
2458 | ||
7deb2264 TG |
2459 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2460 | { | |
2461 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2462 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2463 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
2464 | + userpolicy_type_attrsize(); | |
2465 | } | |
2466 | ||
1da177e4 | 2467 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
d51d081d | 2468 | int dir, struct km_event *c) |
1da177e4 LT |
2469 | { |
2470 | struct xfrm_user_polexpire *upe; | |
2471 | struct nlmsghdr *nlh; | |
d51d081d | 2472 | int hard = c->data.hard; |
1da177e4 | 2473 | |
79b8b7f4 TG |
2474 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2475 | if (nlh == NULL) | |
2476 | return -EMSGSIZE; | |
1da177e4 | 2477 | |
7b67c857 | 2478 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2479 | copy_to_user_policy(xp, &upe->pol, dir); |
2480 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2481 | goto nlmsg_failure; | |
df71837d TJ |
2482 | if (copy_to_user_sec_ctx(xp, skb)) |
2483 | goto nlmsg_failure; | |
1459bb36 | 2484 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2485 | goto nlmsg_failure; |
1da177e4 LT |
2486 | upe->hard = !!hard; |
2487 | ||
9825069d | 2488 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2489 | |
2490 | nlmsg_failure: | |
9825069d TG |
2491 | nlmsg_cancel(skb, nlh); |
2492 | return -EMSGSIZE; | |
1da177e4 LT |
2493 | } |
2494 | ||
26b15dad | 2495 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 | 2496 | { |
fc34acd3 | 2497 | struct net *net = xp_net(xp); |
1da177e4 | 2498 | struct sk_buff *skb; |
1da177e4 | 2499 | |
7deb2264 | 2500 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2501 | if (skb == NULL) |
2502 | return -ENOMEM; | |
2503 | ||
d51d081d | 2504 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2505 | BUG(); |
2506 | ||
a6483b79 | 2507 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2508 | } |
2509 | ||
26b15dad JHS |
2510 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2511 | { | |
fc34acd3 | 2512 | struct net *net = xp_net(xp); |
26b15dad | 2513 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2514 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2515 | struct nlmsghdr *nlh; |
2516 | struct sk_buff *skb; | |
7deb2264 | 2517 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2518 | int headlen; |
2519 | ||
2520 | headlen = sizeof(*p); | |
2521 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2522 | len += nla_total_size(headlen); |
0603eac0 HX |
2523 | headlen = sizeof(*id); |
2524 | } | |
cfbfd45a | 2525 | len += userpolicy_type_attrsize(); |
7deb2264 | 2526 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2527 | |
7deb2264 | 2528 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2529 | if (skb == NULL) |
2530 | return -ENOMEM; | |
26b15dad | 2531 | |
79b8b7f4 TG |
2532 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2533 | if (nlh == NULL) | |
2534 | goto nlmsg_failure; | |
26b15dad | 2535 | |
7b67c857 | 2536 | p = nlmsg_data(nlh); |
0603eac0 | 2537 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2538 | struct nlattr *attr; |
2539 | ||
7b67c857 | 2540 | id = nlmsg_data(nlh); |
0603eac0 HX |
2541 | memset(id, 0, sizeof(*id)); |
2542 | id->dir = dir; | |
2543 | if (c->data.byid) | |
2544 | id->index = xp->index; | |
2545 | else | |
2546 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2547 | ||
c0144bea TG |
2548 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2549 | if (attr == NULL) | |
2550 | goto nlmsg_failure; | |
2551 | ||
2552 | p = nla_data(attr); | |
0603eac0 | 2553 | } |
26b15dad | 2554 | |
26b15dad JHS |
2555 | copy_to_user_policy(xp, p, dir); |
2556 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2557 | goto nlmsg_failure; | |
1459bb36 | 2558 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2559 | goto nlmsg_failure; |
26b15dad | 2560 | |
9825069d | 2561 | nlmsg_end(skb, nlh); |
26b15dad | 2562 | |
a6483b79 | 2563 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2564 | |
2565 | nlmsg_failure: | |
2566 | kfree_skb(skb); | |
2567 | return -1; | |
2568 | } | |
2569 | ||
2570 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2571 | { | |
7067802e | 2572 | struct net *net = c->net; |
26b15dad JHS |
2573 | struct nlmsghdr *nlh; |
2574 | struct sk_buff *skb; | |
26b15dad | 2575 | |
7deb2264 | 2576 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2577 | if (skb == NULL) |
2578 | return -ENOMEM; | |
26b15dad | 2579 | |
79b8b7f4 TG |
2580 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2581 | if (nlh == NULL) | |
2582 | goto nlmsg_failure; | |
0c51f53c JHS |
2583 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2584 | goto nlmsg_failure; | |
26b15dad | 2585 | |
9825069d | 2586 | nlmsg_end(skb, nlh); |
26b15dad | 2587 | |
a6483b79 | 2588 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2589 | |
2590 | nlmsg_failure: | |
2591 | kfree_skb(skb); | |
2592 | return -1; | |
2593 | } | |
2594 | ||
2595 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2596 | { | |
2597 | ||
2598 | switch (c->event) { | |
f60f6b8f HX |
2599 | case XFRM_MSG_NEWPOLICY: |
2600 | case XFRM_MSG_UPDPOLICY: | |
2601 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2602 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2603 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2604 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2605 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2606 | return xfrm_exp_policy_notify(xp, dir, c); |
2607 | default: | |
2608 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2609 | } | |
2610 | ||
2611 | return 0; | |
2612 | ||
2613 | } | |
2614 | ||
7deb2264 TG |
2615 | static inline size_t xfrm_report_msgsize(void) |
2616 | { | |
2617 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2618 | } | |
2619 | ||
97a64b45 MN |
2620 | static int build_report(struct sk_buff *skb, u8 proto, |
2621 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2622 | { | |
2623 | struct xfrm_user_report *ur; | |
2624 | struct nlmsghdr *nlh; | |
97a64b45 | 2625 | |
79b8b7f4 TG |
2626 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2627 | if (nlh == NULL) | |
2628 | return -EMSGSIZE; | |
97a64b45 | 2629 | |
7b67c857 | 2630 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2631 | ur->proto = proto; |
2632 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2633 | ||
2634 | if (addr) | |
c0144bea | 2635 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2636 | |
9825069d | 2637 | return nlmsg_end(skb, nlh); |
97a64b45 | 2638 | |
c0144bea | 2639 | nla_put_failure: |
9825069d TG |
2640 | nlmsg_cancel(skb, nlh); |
2641 | return -EMSGSIZE; | |
97a64b45 MN |
2642 | } |
2643 | ||
db983c11 AD |
2644 | static int xfrm_send_report(struct net *net, u8 proto, |
2645 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2646 | { |
2647 | struct sk_buff *skb; | |
97a64b45 | 2648 | |
7deb2264 | 2649 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2650 | if (skb == NULL) |
2651 | return -ENOMEM; | |
2652 | ||
2653 | if (build_report(skb, proto, sel, addr) < 0) | |
2654 | BUG(); | |
2655 | ||
a6483b79 | 2656 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2657 | } |
2658 | ||
3a2dfbe8 MW |
2659 | static inline size_t xfrm_mapping_msgsize(void) |
2660 | { | |
2661 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2662 | } | |
2663 | ||
2664 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2665 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2666 | { | |
2667 | struct xfrm_user_mapping *um; | |
2668 | struct nlmsghdr *nlh; | |
2669 | ||
2670 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2671 | if (nlh == NULL) | |
2672 | return -EMSGSIZE; | |
2673 | ||
2674 | um = nlmsg_data(nlh); | |
2675 | ||
2676 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2677 | um->id.spi = x->id.spi; | |
2678 | um->id.family = x->props.family; | |
2679 | um->id.proto = x->id.proto; | |
2680 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2681 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2682 | um->new_sport = new_sport; | |
2683 | um->old_sport = x->encap->encap_sport; | |
2684 | um->reqid = x->props.reqid; | |
2685 | ||
2686 | return nlmsg_end(skb, nlh); | |
2687 | } | |
2688 | ||
2689 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2690 | __be16 sport) | |
2691 | { | |
a6483b79 | 2692 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2693 | struct sk_buff *skb; |
2694 | ||
2695 | if (x->id.proto != IPPROTO_ESP) | |
2696 | return -EINVAL; | |
2697 | ||
2698 | if (!x->encap) | |
2699 | return -EINVAL; | |
2700 | ||
2701 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2702 | if (skb == NULL) | |
2703 | return -ENOMEM; | |
2704 | ||
2705 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2706 | BUG(); | |
2707 | ||
a6483b79 | 2708 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2709 | } |
2710 | ||
1da177e4 LT |
2711 | static struct xfrm_mgr netlink_mgr = { |
2712 | .id = "netlink", | |
2713 | .notify = xfrm_send_state_notify, | |
2714 | .acquire = xfrm_send_acquire, | |
2715 | .compile_policy = xfrm_compile_policy, | |
2716 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2717 | .report = xfrm_send_report, |
5c79de6e | 2718 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2719 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2720 | }; |
2721 | ||
a6483b79 | 2722 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2723 | { |
be33690d PM |
2724 | struct sock *nlsk; |
2725 | ||
a6483b79 | 2726 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2727 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2728 | if (nlsk == NULL) |
1da177e4 | 2729 | return -ENOMEM; |
d79d792e | 2730 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
a6483b79 | 2731 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2732 | return 0; |
2733 | } | |
2734 | ||
d79d792e | 2735 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 2736 | { |
d79d792e EB |
2737 | struct net *net; |
2738 | list_for_each_entry(net, net_exit_list, exit_list) | |
2739 | rcu_assign_pointer(net->xfrm.nlsk, NULL); | |
2740 | synchronize_net(); | |
2741 | list_for_each_entry(net, net_exit_list, exit_list) | |
2742 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
2743 | } |
2744 | ||
a6483b79 | 2745 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
2746 | .init = xfrm_user_net_init, |
2747 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
2748 | }; |
2749 | ||
2750 | static int __init xfrm_user_init(void) | |
2751 | { | |
2752 | int rv; | |
2753 | ||
2754 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
2755 | ||
2756 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
2757 | if (rv < 0) | |
2758 | return rv; | |
2759 | rv = xfrm_register_km(&netlink_mgr); | |
2760 | if (rv < 0) | |
2761 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2762 | return rv; | |
2763 | } | |
2764 | ||
2765 | static void __exit xfrm_user_exit(void) | |
2766 | { | |
2767 | xfrm_unregister_km(&netlink_mgr); | |
2768 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2769 | } | |
2770 | ||
1da177e4 LT |
2771 | module_init(xfrm_user_init); |
2772 | module_exit(xfrm_user_exit); | |
2773 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2774 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2775 |