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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* xfrm_user.c: User interface to configure xfrm engine. |
2 | * | |
3 | * Copyright (C) 2002 David S. Miller (davem@redhat.com) | |
4 | * | |
5 | * Changes: | |
6 | * Mitsuru KANDA @USAGI | |
7 | * Kazunori MIYAZAWA @USAGI | |
8 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
9 | * IPv6 support | |
df71837d | 10 | * |
1da177e4 LT |
11 | */ |
12 | ||
9409f38a | 13 | #include <linux/crypto.h> |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/net.h> | |
21 | #include <linux/skbuff.h> | |
1da177e4 LT |
22 | #include <linux/pfkeyv2.h> |
23 | #include <linux/ipsec.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/security.h> | |
26 | #include <net/sock.h> | |
27 | #include <net/xfrm.h> | |
88fc2c84 | 28 | #include <net/netlink.h> |
1da177e4 | 29 | #include <asm/uaccess.h> |
e23c7194 MN |
30 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
31 | #include <linux/in6.h> | |
32 | #endif | |
1da177e4 | 33 | |
1a6509d9 HX |
34 | static inline int aead_len(struct xfrm_algo_aead *alg) |
35 | { | |
36 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
37 | } | |
38 | ||
5424f32e | 39 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 40 | { |
5424f32e | 41 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
42 | struct xfrm_algo *algp; |
43 | ||
44 | if (!rt) | |
45 | return 0; | |
46 | ||
5424f32e | 47 | algp = nla_data(rt); |
0f99be0d | 48 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
49 | return -EINVAL; |
50 | ||
1da177e4 LT |
51 | switch (type) { |
52 | case XFRMA_ALG_AUTH: | |
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 | ||
6f26b61e JHS |
449 | xfrm_mark_get(attrs, &x->mark); |
450 | ||
72cb6962 | 451 | err = xfrm_init_state(x); |
1da177e4 LT |
452 | if (err) |
453 | goto error; | |
454 | ||
fd21150a TG |
455 | if (attrs[XFRMA_SEC_CTX] && |
456 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
457 | goto error; |
458 | ||
1da177e4 | 459 | x->km.seq = p->seq; |
b27aeadb | 460 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 461 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 462 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d JHS |
463 | x->preplay.bitmap = 0; |
464 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
465 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
466 | ||
467 | /* override default values from above */ | |
468 | ||
5424f32e | 469 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
470 | |
471 | return x; | |
472 | ||
473 | error: | |
474 | x->km.state = XFRM_STATE_DEAD; | |
475 | xfrm_state_put(x); | |
476 | error_no_put: | |
477 | *errp = err; | |
478 | return NULL; | |
479 | } | |
480 | ||
22e70050 | 481 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 482 | struct nlattr **attrs) |
1da177e4 | 483 | { |
fc34acd3 | 484 | struct net *net = sock_net(skb->sk); |
7b67c857 | 485 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
486 | struct xfrm_state *x; |
487 | int err; | |
26b15dad | 488 | struct km_event c; |
2532386f EP |
489 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
490 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
491 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 492 | |
35a7aa08 | 493 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
494 | if (err) |
495 | return err; | |
496 | ||
fc34acd3 | 497 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
498 | if (!x) |
499 | return err; | |
500 | ||
26b15dad | 501 | xfrm_state_hold(x); |
1da177e4 LT |
502 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
503 | err = xfrm_state_add(x); | |
504 | else | |
505 | err = xfrm_state_update(x); | |
506 | ||
2532386f | 507 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 508 | |
1da177e4 LT |
509 | if (err < 0) { |
510 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 511 | __xfrm_state_put(x); |
7d6dfe1f | 512 | goto out; |
1da177e4 LT |
513 | } |
514 | ||
26b15dad JHS |
515 | c.seq = nlh->nlmsg_seq; |
516 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 517 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
518 | |
519 | km_state_notify(x, &c); | |
7d6dfe1f | 520 | out: |
26b15dad | 521 | xfrm_state_put(x); |
1da177e4 LT |
522 | return err; |
523 | } | |
524 | ||
fc34acd3 AD |
525 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
526 | struct xfrm_usersa_id *p, | |
5424f32e | 527 | struct nlattr **attrs, |
eb2971b6 MN |
528 | int *errp) |
529 | { | |
530 | struct xfrm_state *x = NULL; | |
6f26b61e | 531 | struct xfrm_mark m; |
eb2971b6 | 532 | int err; |
6f26b61e | 533 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
534 | |
535 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
536 | err = -ESRCH; | |
6f26b61e | 537 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
538 | } else { |
539 | xfrm_address_t *saddr = NULL; | |
540 | ||
35a7aa08 | 541 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
542 | if (!saddr) { |
543 | err = -EINVAL; | |
544 | goto out; | |
545 | } | |
546 | ||
9abbffee | 547 | err = -ESRCH; |
6f26b61e JHS |
548 | x = xfrm_state_lookup_byaddr(net, mark, |
549 | &p->daddr, saddr, | |
221df1ed | 550 | p->proto, p->family); |
eb2971b6 MN |
551 | } |
552 | ||
553 | out: | |
554 | if (!x && errp) | |
555 | *errp = err; | |
556 | return x; | |
557 | } | |
558 | ||
22e70050 | 559 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 560 | struct nlattr **attrs) |
1da177e4 | 561 | { |
fc34acd3 | 562 | struct net *net = sock_net(skb->sk); |
1da177e4 | 563 | struct xfrm_state *x; |
eb2971b6 | 564 | int err = -ESRCH; |
26b15dad | 565 | struct km_event c; |
7b67c857 | 566 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
2532386f EP |
567 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
568 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
569 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 570 | |
fc34acd3 | 571 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 572 | if (x == NULL) |
eb2971b6 | 573 | return err; |
1da177e4 | 574 | |
6f68dc37 | 575 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
576 | goto out; |
577 | ||
1da177e4 | 578 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
579 | err = -EPERM; |
580 | goto out; | |
1da177e4 LT |
581 | } |
582 | ||
26b15dad | 583 | err = xfrm_state_delete(x); |
161a09e7 | 584 | |
c8c05a8e CZ |
585 | if (err < 0) |
586 | goto out; | |
26b15dad JHS |
587 | |
588 | c.seq = nlh->nlmsg_seq; | |
589 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 590 | c.event = nlh->nlmsg_type; |
26b15dad | 591 | km_state_notify(x, &c); |
1da177e4 | 592 | |
c8c05a8e | 593 | out: |
2532386f | 594 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 595 | xfrm_state_put(x); |
26b15dad | 596 | return err; |
1da177e4 LT |
597 | } |
598 | ||
599 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
600 | { | |
601 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
602 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
603 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
604 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
605 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 606 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
607 | p->mode = x->props.mode; |
608 | p->replay_window = x->props.replay_window; | |
609 | p->reqid = x->props.reqid; | |
610 | p->family = x->props.family; | |
611 | p->flags = x->props.flags; | |
612 | p->seq = x->km.seq; | |
613 | } | |
614 | ||
615 | struct xfrm_dump_info { | |
616 | struct sk_buff *in_skb; | |
617 | struct sk_buff *out_skb; | |
618 | u32 nlmsg_seq; | |
619 | u16 nlmsg_flags; | |
1da177e4 LT |
620 | }; |
621 | ||
c0144bea TG |
622 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
623 | { | |
c0144bea TG |
624 | struct xfrm_user_sec_ctx *uctx; |
625 | struct nlattr *attr; | |
68325d3b | 626 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
627 | |
628 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
629 | if (attr == NULL) | |
630 | return -EMSGSIZE; | |
631 | ||
632 | uctx = nla_data(attr); | |
633 | uctx->exttype = XFRMA_SEC_CTX; | |
634 | uctx->len = ctx_size; | |
635 | uctx->ctx_doi = s->ctx_doi; | |
636 | uctx->ctx_alg = s->ctx_alg; | |
637 | uctx->ctx_len = s->ctx_len; | |
638 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
4447bb33 MW |
643 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
644 | { | |
645 | struct xfrm_algo *algo; | |
646 | struct nlattr *nla; | |
647 | ||
648 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
649 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
650 | if (!nla) | |
651 | return -EMSGSIZE; | |
652 | ||
653 | algo = nla_data(nla); | |
654 | strcpy(algo->alg_name, auth->alg_name); | |
655 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); | |
656 | algo->alg_key_len = auth->alg_key_len; | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
68325d3b HX |
661 | /* Don't change this without updating xfrm_sa_len! */ |
662 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
663 | struct xfrm_usersa_info *p, | |
664 | struct sk_buff *skb) | |
1da177e4 | 665 | { |
1da177e4 LT |
666 | copy_to_user_state(x, p); |
667 | ||
050f009e HX |
668 | if (x->coaddr) |
669 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
670 | ||
671 | if (x->lastused) | |
672 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); | |
050f009e | 673 | |
1a6509d9 HX |
674 | if (x->aead) |
675 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
4447bb33 MW |
676 | if (x->aalg) { |
677 | if (copy_to_user_auth(x->aalg, skb)) | |
678 | goto nla_put_failure; | |
679 | ||
680 | NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC, | |
681 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
682 | } | |
1da177e4 | 683 | if (x->ealg) |
0f99be0d | 684 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
1da177e4 | 685 | if (x->calg) |
c0144bea | 686 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
687 | |
688 | if (x->encap) | |
c0144bea | 689 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 690 | |
6f26b61e JHS |
691 | if (xfrm_mark_put(skb, &x->mark)) |
692 | goto nla_put_failure; | |
693 | ||
c0144bea TG |
694 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
695 | goto nla_put_failure; | |
060f02a3 | 696 | |
68325d3b HX |
697 | return 0; |
698 | ||
699 | nla_put_failure: | |
700 | return -EMSGSIZE; | |
701 | } | |
702 | ||
703 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
704 | { | |
705 | struct xfrm_dump_info *sp = ptr; | |
706 | struct sk_buff *in_skb = sp->in_skb; | |
707 | struct sk_buff *skb = sp->out_skb; | |
708 | struct xfrm_usersa_info *p; | |
709 | struct nlmsghdr *nlh; | |
710 | int err; | |
711 | ||
68325d3b HX |
712 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
713 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
714 | if (nlh == NULL) | |
715 | return -EMSGSIZE; | |
716 | ||
717 | p = nlmsg_data(nlh); | |
718 | ||
719 | err = copy_to_user_state_extra(x, p, skb); | |
720 | if (err) | |
721 | goto nla_put_failure; | |
722 | ||
9825069d | 723 | nlmsg_end(skb, nlh); |
1da177e4 LT |
724 | return 0; |
725 | ||
c0144bea | 726 | nla_put_failure: |
9825069d | 727 | nlmsg_cancel(skb, nlh); |
68325d3b | 728 | return err; |
1da177e4 LT |
729 | } |
730 | ||
4c563f76 TT |
731 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
732 | { | |
733 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
734 | xfrm_state_walk_done(walk); | |
735 | return 0; | |
736 | } | |
737 | ||
1da177e4 LT |
738 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
739 | { | |
fc34acd3 | 740 | struct net *net = sock_net(skb->sk); |
4c563f76 | 741 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
742 | struct xfrm_dump_info info; |
743 | ||
4c563f76 TT |
744 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
745 | sizeof(cb->args) - sizeof(cb->args[0])); | |
746 | ||
1da177e4 LT |
747 | info.in_skb = cb->skb; |
748 | info.out_skb = skb; | |
749 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
750 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
751 | |
752 | if (!cb->args[0]) { | |
753 | cb->args[0] = 1; | |
754 | xfrm_state_walk_init(walk, 0); | |
755 | } | |
756 | ||
fc34acd3 | 757 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
758 | |
759 | return skb->len; | |
760 | } | |
761 | ||
762 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
763 | struct xfrm_state *x, u32 seq) | |
764 | { | |
765 | struct xfrm_dump_info info; | |
766 | struct sk_buff *skb; | |
767 | ||
7deb2264 | 768 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
769 | if (!skb) |
770 | return ERR_PTR(-ENOMEM); | |
771 | ||
1da177e4 LT |
772 | info.in_skb = in_skb; |
773 | info.out_skb = skb; | |
774 | info.nlmsg_seq = seq; | |
775 | info.nlmsg_flags = 0; | |
1da177e4 LT |
776 | |
777 | if (dump_one_state(x, 0, &info)) { | |
778 | kfree_skb(skb); | |
779 | return NULL; | |
780 | } | |
781 | ||
782 | return skb; | |
783 | } | |
784 | ||
7deb2264 TG |
785 | static inline size_t xfrm_spdinfo_msgsize(void) |
786 | { | |
787 | return NLMSG_ALIGN(4) | |
788 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
789 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
790 | } | |
791 | ||
e071041b AD |
792 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
793 | u32 pid, u32 seq, u32 flags) | |
ecfd6b18 | 794 | { |
5a6d3416 JHS |
795 | struct xfrmk_spdinfo si; |
796 | struct xfrmu_spdinfo spc; | |
797 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
798 | struct nlmsghdr *nlh; |
799 | u32 *f; | |
800 | ||
801 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
802 | if (nlh == NULL) /* shouldnt really happen ... */ | |
803 | return -EMSGSIZE; | |
804 | ||
805 | f = nlmsg_data(nlh); | |
806 | *f = flags; | |
e071041b | 807 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
808 | spc.incnt = si.incnt; |
809 | spc.outcnt = si.outcnt; | |
810 | spc.fwdcnt = si.fwdcnt; | |
811 | spc.inscnt = si.inscnt; | |
812 | spc.outscnt = si.outscnt; | |
813 | spc.fwdscnt = si.fwdscnt; | |
814 | sph.spdhcnt = si.spdhcnt; | |
815 | sph.spdhmcnt = si.spdhmcnt; | |
816 | ||
817 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
818 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
819 | |
820 | return nlmsg_end(skb, nlh); | |
821 | ||
822 | nla_put_failure: | |
823 | nlmsg_cancel(skb, nlh); | |
824 | return -EMSGSIZE; | |
825 | } | |
826 | ||
827 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 828 | struct nlattr **attrs) |
ecfd6b18 | 829 | { |
a6483b79 | 830 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 831 | struct sk_buff *r_skb; |
7b67c857 | 832 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
833 | u32 spid = NETLINK_CB(skb).pid; |
834 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 835 | |
7deb2264 | 836 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
837 | if (r_skb == NULL) |
838 | return -ENOMEM; | |
839 | ||
e071041b | 840 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
ecfd6b18 JHS |
841 | BUG(); |
842 | ||
a6483b79 | 843 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
844 | } |
845 | ||
7deb2264 TG |
846 | static inline size_t xfrm_sadinfo_msgsize(void) |
847 | { | |
848 | return NLMSG_ALIGN(4) | |
849 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
850 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
851 | } | |
852 | ||
e071041b AD |
853 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
854 | u32 pid, u32 seq, u32 flags) | |
28d8909b | 855 | { |
af11e316 JHS |
856 | struct xfrmk_sadinfo si; |
857 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
858 | struct nlmsghdr *nlh; |
859 | u32 *f; | |
860 | ||
861 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
862 | if (nlh == NULL) /* shouldnt really happen ... */ | |
863 | return -EMSGSIZE; | |
864 | ||
865 | f = nlmsg_data(nlh); | |
866 | *f = flags; | |
e071041b | 867 | xfrm_sad_getinfo(net, &si); |
28d8909b | 868 | |
af11e316 JHS |
869 | sh.sadhmcnt = si.sadhmcnt; |
870 | sh.sadhcnt = si.sadhcnt; | |
871 | ||
872 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
873 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
874 | |
875 | return nlmsg_end(skb, nlh); | |
876 | ||
877 | nla_put_failure: | |
878 | nlmsg_cancel(skb, nlh); | |
879 | return -EMSGSIZE; | |
880 | } | |
881 | ||
882 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 883 | struct nlattr **attrs) |
28d8909b | 884 | { |
a6483b79 | 885 | struct net *net = sock_net(skb->sk); |
28d8909b | 886 | struct sk_buff *r_skb; |
7b67c857 | 887 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
888 | u32 spid = NETLINK_CB(skb).pid; |
889 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 890 | |
7deb2264 | 891 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
892 | if (r_skb == NULL) |
893 | return -ENOMEM; | |
894 | ||
e071041b | 895 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
28d8909b JHS |
896 | BUG(); |
897 | ||
a6483b79 | 898 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
899 | } |
900 | ||
22e70050 | 901 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 902 | struct nlattr **attrs) |
1da177e4 | 903 | { |
fc34acd3 | 904 | struct net *net = sock_net(skb->sk); |
7b67c857 | 905 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
906 | struct xfrm_state *x; |
907 | struct sk_buff *resp_skb; | |
eb2971b6 | 908 | int err = -ESRCH; |
1da177e4 | 909 | |
fc34acd3 | 910 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
911 | if (x == NULL) |
912 | goto out_noput; | |
913 | ||
914 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
915 | if (IS_ERR(resp_skb)) { | |
916 | err = PTR_ERR(resp_skb); | |
917 | } else { | |
a6483b79 | 918 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
919 | } |
920 | xfrm_state_put(x); | |
921 | out_noput: | |
922 | return err; | |
923 | } | |
924 | ||
925 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
926 | { | |
927 | switch (p->info.id.proto) { | |
928 | case IPPROTO_AH: | |
929 | case IPPROTO_ESP: | |
930 | break; | |
931 | ||
932 | case IPPROTO_COMP: | |
933 | /* IPCOMP spi is 16-bits. */ | |
934 | if (p->max >= 0x10000) | |
935 | return -EINVAL; | |
936 | break; | |
937 | ||
938 | default: | |
939 | return -EINVAL; | |
3ff50b79 | 940 | } |
1da177e4 LT |
941 | |
942 | if (p->min > p->max) | |
943 | return -EINVAL; | |
944 | ||
945 | return 0; | |
946 | } | |
947 | ||
22e70050 | 948 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 949 | struct nlattr **attrs) |
1da177e4 | 950 | { |
fc34acd3 | 951 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
952 | struct xfrm_state *x; |
953 | struct xfrm_userspi_info *p; | |
954 | struct sk_buff *resp_skb; | |
955 | xfrm_address_t *daddr; | |
956 | int family; | |
957 | int err; | |
6f26b61e JHS |
958 | u32 mark; |
959 | struct xfrm_mark m; | |
1da177e4 | 960 | |
7b67c857 | 961 | p = nlmsg_data(nlh); |
1da177e4 LT |
962 | err = verify_userspi_info(p); |
963 | if (err) | |
964 | goto out_noput; | |
965 | ||
966 | family = p->info.family; | |
967 | daddr = &p->info.id.daddr; | |
968 | ||
969 | x = NULL; | |
6f26b61e JHS |
970 | |
971 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 972 | if (p->info.seq) { |
6f26b61e | 973 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
1da177e4 LT |
974 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
975 | xfrm_state_put(x); | |
976 | x = NULL; | |
977 | } | |
978 | } | |
979 | ||
980 | if (!x) | |
6f26b61e | 981 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
982 | p->info.id.proto, daddr, |
983 | &p->info.saddr, 1, | |
984 | family); | |
985 | err = -ENOENT; | |
986 | if (x == NULL) | |
987 | goto out_noput; | |
988 | ||
658b219e HX |
989 | err = xfrm_alloc_spi(x, p->min, p->max); |
990 | if (err) | |
991 | goto out; | |
1da177e4 | 992 | |
658b219e | 993 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
994 | if (IS_ERR(resp_skb)) { |
995 | err = PTR_ERR(resp_skb); | |
996 | goto out; | |
997 | } | |
998 | ||
a6483b79 | 999 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1000 | |
1001 | out: | |
1002 | xfrm_state_put(x); | |
1003 | out_noput: | |
1004 | return err; | |
1005 | } | |
1006 | ||
b798a9ed | 1007 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1008 | { |
1009 | switch (dir) { | |
1010 | case XFRM_POLICY_IN: | |
1011 | case XFRM_POLICY_OUT: | |
1012 | case XFRM_POLICY_FWD: | |
1013 | break; | |
1014 | ||
1015 | default: | |
1016 | return -EINVAL; | |
3ff50b79 | 1017 | } |
1da177e4 LT |
1018 | |
1019 | return 0; | |
1020 | } | |
1021 | ||
b798a9ed | 1022 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1023 | { |
1024 | switch (type) { | |
1025 | case XFRM_POLICY_TYPE_MAIN: | |
1026 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1027 | case XFRM_POLICY_TYPE_SUB: | |
1028 | #endif | |
1029 | break; | |
1030 | ||
1031 | default: | |
1032 | return -EINVAL; | |
3ff50b79 | 1033 | } |
f7b6983f MN |
1034 | |
1035 | return 0; | |
1036 | } | |
1037 | ||
1da177e4 LT |
1038 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1039 | { | |
1040 | switch (p->share) { | |
1041 | case XFRM_SHARE_ANY: | |
1042 | case XFRM_SHARE_SESSION: | |
1043 | case XFRM_SHARE_USER: | |
1044 | case XFRM_SHARE_UNIQUE: | |
1045 | break; | |
1046 | ||
1047 | default: | |
1048 | return -EINVAL; | |
3ff50b79 | 1049 | } |
1da177e4 LT |
1050 | |
1051 | switch (p->action) { | |
1052 | case XFRM_POLICY_ALLOW: | |
1053 | case XFRM_POLICY_BLOCK: | |
1054 | break; | |
1055 | ||
1056 | default: | |
1057 | return -EINVAL; | |
3ff50b79 | 1058 | } |
1da177e4 LT |
1059 | |
1060 | switch (p->sel.family) { | |
1061 | case AF_INET: | |
1062 | break; | |
1063 | ||
1064 | case AF_INET6: | |
1065 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1066 | break; | |
1067 | #else | |
1068 | return -EAFNOSUPPORT; | |
1069 | #endif | |
1070 | ||
1071 | default: | |
1072 | return -EINVAL; | |
3ff50b79 | 1073 | } |
1da177e4 LT |
1074 | |
1075 | return verify_policy_dir(p->dir); | |
1076 | } | |
1077 | ||
5424f32e | 1078 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1079 | { |
5424f32e | 1080 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1081 | struct xfrm_user_sec_ctx *uctx; |
1082 | ||
1083 | if (!rt) | |
1084 | return 0; | |
1085 | ||
5424f32e | 1086 | uctx = nla_data(rt); |
03e1ad7b | 1087 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1088 | } |
1089 | ||
1da177e4 LT |
1090 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1091 | int nr) | |
1092 | { | |
1093 | int i; | |
1094 | ||
1095 | xp->xfrm_nr = nr; | |
1096 | for (i = 0; i < nr; i++, ut++) { | |
1097 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1098 | ||
1099 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1100 | memcpy(&t->saddr, &ut->saddr, | |
1101 | sizeof(xfrm_address_t)); | |
1102 | t->reqid = ut->reqid; | |
1103 | t->mode = ut->mode; | |
1104 | t->share = ut->share; | |
1105 | t->optional = ut->optional; | |
1106 | t->aalgos = ut->aalgos; | |
1107 | t->ealgos = ut->ealgos; | |
1108 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1109 | /* If all masks are ~0, then we allow all algorithms. */ |
1110 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1111 | t->encap_family = ut->family; |
1da177e4 LT |
1112 | } |
1113 | } | |
1114 | ||
b4ad86bf DM |
1115 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1116 | { | |
1117 | int i; | |
1118 | ||
1119 | if (nr > XFRM_MAX_DEPTH) | |
1120 | return -EINVAL; | |
1121 | ||
1122 | for (i = 0; i < nr; i++) { | |
1123 | /* We never validated the ut->family value, so many | |
1124 | * applications simply leave it at zero. The check was | |
1125 | * never made and ut->family was ignored because all | |
1126 | * templates could be assumed to have the same family as | |
1127 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1128 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1129 | */ | |
1130 | if (!ut[i].family) | |
1131 | ut[i].family = family; | |
1132 | ||
1133 | switch (ut[i].family) { | |
1134 | case AF_INET: | |
1135 | break; | |
1136 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1137 | case AF_INET6: | |
1138 | break; | |
1139 | #endif | |
1140 | default: | |
1141 | return -EINVAL; | |
3ff50b79 | 1142 | } |
b4ad86bf DM |
1143 | } |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | ||
5424f32e | 1148 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1149 | { |
5424f32e | 1150 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1151 | |
1152 | if (!rt) { | |
1153 | pol->xfrm_nr = 0; | |
1154 | } else { | |
5424f32e TG |
1155 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1156 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1157 | int err; |
1da177e4 | 1158 | |
b4ad86bf DM |
1159 | err = validate_tmpl(nr, utmpl, pol->family); |
1160 | if (err) | |
1161 | return err; | |
1da177e4 | 1162 | |
5424f32e | 1163 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1164 | } |
1165 | return 0; | |
1166 | } | |
1167 | ||
5424f32e | 1168 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1169 | { |
5424f32e | 1170 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1171 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1172 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1173 | int err; |
1174 | ||
1175 | if (rt) { | |
5424f32e | 1176 | upt = nla_data(rt); |
f7b6983f MN |
1177 | type = upt->type; |
1178 | } | |
1179 | ||
1180 | err = verify_policy_type(type); | |
1181 | if (err) | |
1182 | return err; | |
1183 | ||
1184 | *tp = type; | |
1185 | return 0; | |
1186 | } | |
1187 | ||
1da177e4 LT |
1188 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1189 | { | |
1190 | xp->priority = p->priority; | |
1191 | xp->index = p->index; | |
1192 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1193 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1194 | xp->action = p->action; | |
1195 | xp->flags = p->flags; | |
1196 | xp->family = p->sel.family; | |
1197 | /* XXX xp->share = p->share; */ | |
1198 | } | |
1199 | ||
1200 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1201 | { | |
1202 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1203 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1204 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1205 | p->priority = xp->priority; | |
1206 | p->index = xp->index; | |
1207 | p->sel.family = xp->family; | |
1208 | p->dir = dir; | |
1209 | p->action = xp->action; | |
1210 | p->flags = xp->flags; | |
1211 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1212 | } | |
1213 | ||
fc34acd3 | 1214 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1215 | { |
fc34acd3 | 1216 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1217 | int err; |
1218 | ||
1219 | if (!xp) { | |
1220 | *errp = -ENOMEM; | |
1221 | return NULL; | |
1222 | } | |
1223 | ||
1224 | copy_from_user_policy(xp, p); | |
df71837d | 1225 | |
35a7aa08 | 1226 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1227 | if (err) |
1228 | goto error; | |
1229 | ||
35a7aa08 TG |
1230 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1231 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1232 | if (err) |
1233 | goto error; | |
1da177e4 | 1234 | |
295fae56 JHS |
1235 | xfrm_mark_get(attrs, &xp->mark); |
1236 | ||
1da177e4 | 1237 | return xp; |
f7b6983f MN |
1238 | error: |
1239 | *errp = err; | |
12a169e7 | 1240 | xp->walk.dead = 1; |
64c31b3f | 1241 | xfrm_policy_destroy(xp); |
f7b6983f | 1242 | return NULL; |
1da177e4 LT |
1243 | } |
1244 | ||
22e70050 | 1245 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1246 | struct nlattr **attrs) |
1da177e4 | 1247 | { |
fc34acd3 | 1248 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1249 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1250 | struct xfrm_policy *xp; |
26b15dad | 1251 | struct km_event c; |
1da177e4 LT |
1252 | int err; |
1253 | int excl; | |
2532386f EP |
1254 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1255 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1256 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 LT |
1257 | |
1258 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1259 | if (err) |
1260 | return err; | |
35a7aa08 | 1261 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1262 | if (err) |
1263 | return err; | |
1264 | ||
fc34acd3 | 1265 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1266 | if (!xp) |
1267 | return err; | |
1268 | ||
26b15dad JHS |
1269 | /* shouldnt excl be based on nlh flags?? |
1270 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1271 | * in netlink excl is a flag and you wouldnt need | |
1272 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1273 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1274 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2532386f | 1275 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1276 | |
1da177e4 | 1277 | if (err) { |
03e1ad7b | 1278 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1279 | kfree(xp); |
1280 | return err; | |
1281 | } | |
1282 | ||
f60f6b8f | 1283 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1284 | c.seq = nlh->nlmsg_seq; |
1285 | c.pid = nlh->nlmsg_pid; | |
1286 | km_policy_notify(xp, p->dir, &c); | |
1287 | ||
1da177e4 LT |
1288 | xfrm_pol_put(xp); |
1289 | ||
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1294 | { | |
1295 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1296 | int i; | |
1297 | ||
1298 | if (xp->xfrm_nr == 0) | |
1299 | return 0; | |
1300 | ||
1301 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1302 | struct xfrm_user_tmpl *up = &vec[i]; | |
1303 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1304 | ||
1305 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1306 | up->family = kp->encap_family; |
1da177e4 LT |
1307 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1308 | up->reqid = kp->reqid; | |
1309 | up->mode = kp->mode; | |
1310 | up->share = kp->share; | |
1311 | up->optional = kp->optional; | |
1312 | up->aalgos = kp->aalgos; | |
1313 | up->ealgos = kp->ealgos; | |
1314 | up->calgos = kp->calgos; | |
1315 | } | |
df71837d | 1316 | |
c0144bea TG |
1317 | return nla_put(skb, XFRMA_TMPL, |
1318 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1319 | } |
1320 | ||
1321 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1322 | { | |
1323 | if (x->security) { | |
1324 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1325 | } |
1326 | return 0; | |
0d681623 | 1327 | } |
df71837d | 1328 | |
0d681623 SH |
1329 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1330 | { | |
1331 | if (xp->security) { | |
1332 | return copy_sec_ctx(xp->security, skb); | |
1333 | } | |
1334 | return 0; | |
df71837d | 1335 | } |
cfbfd45a TG |
1336 | static inline size_t userpolicy_type_attrsize(void) |
1337 | { | |
1338 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1339 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1340 | #else | |
1341 | return 0; | |
1342 | #endif | |
1343 | } | |
df71837d | 1344 | |
f7b6983f | 1345 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1346 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1347 | { |
c0144bea TG |
1348 | struct xfrm_userpolicy_type upt = { |
1349 | .type = type, | |
1350 | }; | |
f7b6983f | 1351 | |
c0144bea | 1352 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1353 | } |
1354 | ||
1355 | #else | |
b798a9ed | 1356 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1357 | { |
1358 | return 0; | |
1359 | } | |
1360 | #endif | |
1361 | ||
1da177e4 LT |
1362 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1363 | { | |
1364 | struct xfrm_dump_info *sp = ptr; | |
1365 | struct xfrm_userpolicy_info *p; | |
1366 | struct sk_buff *in_skb = sp->in_skb; | |
1367 | struct sk_buff *skb = sp->out_skb; | |
1368 | struct nlmsghdr *nlh; | |
1da177e4 | 1369 | |
79b8b7f4 TG |
1370 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1371 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1372 | if (nlh == NULL) | |
1373 | return -EMSGSIZE; | |
1da177e4 | 1374 | |
7b67c857 | 1375 | p = nlmsg_data(nlh); |
1da177e4 LT |
1376 | copy_to_user_policy(xp, p, dir); |
1377 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1378 | goto nlmsg_failure; | |
df71837d TJ |
1379 | if (copy_to_user_sec_ctx(xp, skb)) |
1380 | goto nlmsg_failure; | |
1459bb36 | 1381 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1382 | goto nlmsg_failure; |
295fae56 JHS |
1383 | if (xfrm_mark_put(skb, &xp->mark)) |
1384 | goto nla_put_failure; | |
1da177e4 | 1385 | |
9825069d | 1386 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1387 | return 0; |
1388 | ||
295fae56 | 1389 | nla_put_failure: |
1da177e4 | 1390 | nlmsg_failure: |
9825069d TG |
1391 | nlmsg_cancel(skb, nlh); |
1392 | return -EMSGSIZE; | |
1da177e4 LT |
1393 | } |
1394 | ||
4c563f76 TT |
1395 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1396 | { | |
1397 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1398 | ||
1399 | xfrm_policy_walk_done(walk); | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1da177e4 LT |
1403 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1404 | { | |
fc34acd3 | 1405 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1406 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1407 | struct xfrm_dump_info info; |
1408 | ||
4c563f76 TT |
1409 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1410 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1411 | ||
1da177e4 LT |
1412 | info.in_skb = cb->skb; |
1413 | info.out_skb = skb; | |
1414 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1415 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1416 | |
1417 | if (!cb->args[0]) { | |
1418 | cb->args[0] = 1; | |
1419 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1420 | } | |
1421 | ||
fc34acd3 | 1422 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1423 | |
1424 | return skb->len; | |
1425 | } | |
1426 | ||
1427 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1428 | struct xfrm_policy *xp, | |
1429 | int dir, u32 seq) | |
1430 | { | |
1431 | struct xfrm_dump_info info; | |
1432 | struct sk_buff *skb; | |
1433 | ||
7deb2264 | 1434 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1435 | if (!skb) |
1436 | return ERR_PTR(-ENOMEM); | |
1437 | ||
1da177e4 LT |
1438 | info.in_skb = in_skb; |
1439 | info.out_skb = skb; | |
1440 | info.nlmsg_seq = seq; | |
1441 | info.nlmsg_flags = 0; | |
1da177e4 LT |
1442 | |
1443 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1444 | kfree_skb(skb); | |
1445 | return NULL; | |
1446 | } | |
1447 | ||
1448 | return skb; | |
1449 | } | |
1450 | ||
22e70050 | 1451 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1452 | struct nlattr **attrs) |
1da177e4 | 1453 | { |
fc34acd3 | 1454 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1455 | struct xfrm_policy *xp; |
1456 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1457 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1458 | int err; |
26b15dad | 1459 | struct km_event c; |
1da177e4 | 1460 | int delete; |
295fae56 JHS |
1461 | struct xfrm_mark m; |
1462 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1463 | |
7b67c857 | 1464 | p = nlmsg_data(nlh); |
1da177e4 LT |
1465 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1466 | ||
35a7aa08 | 1467 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1468 | if (err) |
1469 | return err; | |
1470 | ||
1da177e4 LT |
1471 | err = verify_policy_dir(p->dir); |
1472 | if (err) | |
1473 | return err; | |
1474 | ||
1475 | if (p->index) | |
295fae56 | 1476 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1477 | else { |
5424f32e | 1478 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1479 | struct xfrm_sec_ctx *ctx; |
df71837d | 1480 | |
35a7aa08 | 1481 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1482 | if (err) |
1483 | return err; | |
1484 | ||
2c8dd116 | 1485 | ctx = NULL; |
df71837d | 1486 | if (rt) { |
5424f32e | 1487 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1488 | |
03e1ad7b PM |
1489 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1490 | if (err) | |
df71837d | 1491 | return err; |
2c8dd116 | 1492 | } |
295fae56 | 1493 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1494 | ctx, delete, &err); |
03e1ad7b | 1495 | security_xfrm_policy_free(ctx); |
df71837d | 1496 | } |
1da177e4 LT |
1497 | if (xp == NULL) |
1498 | return -ENOENT; | |
1499 | ||
1500 | if (!delete) { | |
1501 | struct sk_buff *resp_skb; | |
1502 | ||
1503 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1504 | if (IS_ERR(resp_skb)) { | |
1505 | err = PTR_ERR(resp_skb); | |
1506 | } else { | |
a6483b79 | 1507 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1508 | NETLINK_CB(skb).pid); |
1da177e4 | 1509 | } |
26b15dad | 1510 | } else { |
2532386f EP |
1511 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1512 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1513 | u32 sid = NETLINK_CB(skb).sid; | |
1514 | ||
1515 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, | |
1516 | sid); | |
13fcfbb0 DM |
1517 | |
1518 | if (err != 0) | |
c8c05a8e | 1519 | goto out; |
13fcfbb0 | 1520 | |
e7443892 | 1521 | c.data.byid = p->index; |
f60f6b8f | 1522 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1523 | c.seq = nlh->nlmsg_seq; |
1524 | c.pid = nlh->nlmsg_pid; | |
1525 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1526 | } |
1527 | ||
c8c05a8e | 1528 | out: |
ef41aaa0 | 1529 | xfrm_pol_put(xp); |
1da177e4 LT |
1530 | return err; |
1531 | } | |
1532 | ||
22e70050 | 1533 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1534 | struct nlattr **attrs) |
1da177e4 | 1535 | { |
fc34acd3 | 1536 | struct net *net = sock_net(skb->sk); |
26b15dad | 1537 | struct km_event c; |
7b67c857 | 1538 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1539 | struct xfrm_audit audit_info; |
4aa2e62c | 1540 | int err; |
1da177e4 | 1541 | |
161a09e7 | 1542 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1543 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1544 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1545 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1546 | if (err) { |
1547 | if (err == -ESRCH) /* empty table */ | |
1548 | return 0; | |
069c474e | 1549 | return err; |
9e64cc95 | 1550 | } |
bf08867f | 1551 | c.data.proto = p->proto; |
f60f6b8f | 1552 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1553 | c.seq = nlh->nlmsg_seq; |
1554 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1555 | c.net = net; |
26b15dad JHS |
1556 | km_state_notify(NULL, &c); |
1557 | ||
1da177e4 LT |
1558 | return 0; |
1559 | } | |
1560 | ||
7deb2264 TG |
1561 | static inline size_t xfrm_aevent_msgsize(void) |
1562 | { | |
1563 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) | |
1564 | + nla_total_size(sizeof(struct xfrm_replay_state)) | |
1565 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) | |
6f26b61e | 1566 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1567 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1568 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1569 | } | |
d51d081d JHS |
1570 | |
1571 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1572 | { | |
1573 | struct xfrm_aevent_id *id; | |
1574 | struct nlmsghdr *nlh; | |
d51d081d | 1575 | |
79b8b7f4 TG |
1576 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1577 | if (nlh == NULL) | |
1578 | return -EMSGSIZE; | |
d51d081d | 1579 | |
7b67c857 | 1580 | id = nlmsg_data(nlh); |
2b5f6dcc | 1581 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1582 | id->sa_id.spi = x->id.spi; |
1583 | id->sa_id.family = x->props.family; | |
1584 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1585 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1586 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1587 | id->flags = c->data.aevent; |
1588 | ||
c0144bea TG |
1589 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
1590 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
d51d081d | 1591 | |
c0144bea TG |
1592 | if (id->flags & XFRM_AE_RTHR) |
1593 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1594 | |
c0144bea TG |
1595 | if (id->flags & XFRM_AE_ETHR) |
1596 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1597 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1598 | |
6f26b61e JHS |
1599 | if (xfrm_mark_put(skb, &x->mark)) |
1600 | goto nla_put_failure; | |
1601 | ||
9825069d | 1602 | return nlmsg_end(skb, nlh); |
d51d081d | 1603 | |
c0144bea | 1604 | nla_put_failure: |
9825069d TG |
1605 | nlmsg_cancel(skb, nlh); |
1606 | return -EMSGSIZE; | |
d51d081d JHS |
1607 | } |
1608 | ||
22e70050 | 1609 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1610 | struct nlattr **attrs) |
d51d081d | 1611 | { |
fc34acd3 | 1612 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1613 | struct xfrm_state *x; |
1614 | struct sk_buff *r_skb; | |
1615 | int err; | |
1616 | struct km_event c; | |
6f26b61e JHS |
1617 | u32 mark; |
1618 | struct xfrm_mark m; | |
7b67c857 | 1619 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1620 | struct xfrm_usersa_id *id = &p->sa_id; |
1621 | ||
7deb2264 | 1622 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1623 | if (r_skb == NULL) |
1624 | return -ENOMEM; | |
1625 | ||
6f26b61e JHS |
1626 | mark = xfrm_mark_get(attrs, &m); |
1627 | ||
1628 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d51d081d | 1629 | if (x == NULL) { |
b08d5840 | 1630 | kfree_skb(r_skb); |
d51d081d JHS |
1631 | return -ESRCH; |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * XXX: is this lock really needed - none of the other | |
1636 | * gets lock (the concern is things getting updated | |
1637 | * while we are still reading) - jhs | |
1638 | */ | |
1639 | spin_lock_bh(&x->lock); | |
1640 | c.data.aevent = p->flags; | |
1641 | c.seq = nlh->nlmsg_seq; | |
1642 | c.pid = nlh->nlmsg_pid; | |
1643 | ||
1644 | if (build_aevent(r_skb, x, &c) < 0) | |
1645 | BUG(); | |
a6483b79 | 1646 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1647 | spin_unlock_bh(&x->lock); |
1648 | xfrm_state_put(x); | |
1649 | return err; | |
1650 | } | |
1651 | ||
22e70050 | 1652 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1653 | struct nlattr **attrs) |
d51d081d | 1654 | { |
fc34acd3 | 1655 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1656 | struct xfrm_state *x; |
1657 | struct km_event c; | |
1658 | int err = - EINVAL; | |
6f26b61e JHS |
1659 | u32 mark = 0; |
1660 | struct xfrm_mark m; | |
7b67c857 | 1661 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e TG |
1662 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
1663 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
d51d081d JHS |
1664 | |
1665 | if (!lt && !rp) | |
1666 | return err; | |
1667 | ||
1668 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1669 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1670 | return err; | |
1671 | ||
6f26b61e JHS |
1672 | mark = xfrm_mark_get(attrs, &m); |
1673 | ||
1674 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1675 | if (x == NULL) |
1676 | return -ESRCH; | |
1677 | ||
1678 | if (x->km.state != XFRM_STATE_VALID) | |
1679 | goto out; | |
1680 | ||
1681 | spin_lock_bh(&x->lock); | |
35a7aa08 | 1682 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1683 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1684 | |
1685 | c.event = nlh->nlmsg_type; | |
1686 | c.seq = nlh->nlmsg_seq; | |
1687 | c.pid = nlh->nlmsg_pid; | |
1688 | c.data.aevent = XFRM_AE_CU; | |
1689 | km_state_notify(x, &c); | |
1690 | err = 0; | |
1691 | out: | |
1692 | xfrm_state_put(x); | |
1693 | return err; | |
1694 | } | |
1695 | ||
22e70050 | 1696 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1697 | struct nlattr **attrs) |
1da177e4 | 1698 | { |
fc34acd3 | 1699 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1700 | struct km_event c; |
b798a9ed | 1701 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1702 | int err; |
161a09e7 | 1703 | struct xfrm_audit audit_info; |
f7b6983f | 1704 | |
35a7aa08 | 1705 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1706 | if (err) |
1707 | return err; | |
26b15dad | 1708 | |
161a09e7 | 1709 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1710 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1711 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1712 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1713 | if (err) { |
1714 | if (err == -ESRCH) /* empty table */ | |
1715 | return 0; | |
069c474e | 1716 | return err; |
2f1eb65f JHS |
1717 | } |
1718 | ||
f7b6983f | 1719 | c.data.type = type; |
f60f6b8f | 1720 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1721 | c.seq = nlh->nlmsg_seq; |
1722 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1723 | c.net = net; |
26b15dad | 1724 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1725 | return 0; |
1726 | } | |
1727 | ||
22e70050 | 1728 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1729 | struct nlattr **attrs) |
6c5c8ca7 | 1730 | { |
fc34acd3 | 1731 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1732 | struct xfrm_policy *xp; |
7b67c857 | 1733 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1734 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1735 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1736 | int err = -ENOENT; |
295fae56 JHS |
1737 | struct xfrm_mark m; |
1738 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1739 | |
35a7aa08 | 1740 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1741 | if (err) |
1742 | return err; | |
1743 | ||
c8bf4d04 TT |
1744 | err = verify_policy_dir(p->dir); |
1745 | if (err) | |
1746 | return err; | |
1747 | ||
6c5c8ca7 | 1748 | if (p->index) |
295fae56 | 1749 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1750 | else { |
5424f32e | 1751 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1752 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1753 | |
35a7aa08 | 1754 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1755 | if (err) |
1756 | return err; | |
1757 | ||
2c8dd116 | 1758 | ctx = NULL; |
6c5c8ca7 | 1759 | if (rt) { |
5424f32e | 1760 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1761 | |
03e1ad7b PM |
1762 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1763 | if (err) | |
6c5c8ca7 | 1764 | return err; |
2c8dd116 | 1765 | } |
295fae56 | 1766 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1767 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1768 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1769 | } |
6c5c8ca7 | 1770 | if (xp == NULL) |
ef41aaa0 | 1771 | return -ENOENT; |
03e1ad7b | 1772 | |
ea2dea9d | 1773 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1774 | goto out; |
6c5c8ca7 | 1775 | |
6c5c8ca7 JHS |
1776 | err = 0; |
1777 | if (up->hard) { | |
2532386f EP |
1778 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1779 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1780 | u32 sid = NETLINK_CB(skb).sid; | |
6c5c8ca7 | 1781 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1782 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1783 | |
6c5c8ca7 JHS |
1784 | } else { |
1785 | // reset the timers here? | |
62db5cfd | 1786 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 JHS |
1787 | } |
1788 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1789 | ||
1790 | out: | |
1791 | xfrm_pol_put(xp); | |
1792 | return err; | |
1793 | } | |
1794 | ||
22e70050 | 1795 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1796 | struct nlattr **attrs) |
53bc6b4d | 1797 | { |
fc34acd3 | 1798 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1799 | struct xfrm_state *x; |
1800 | int err; | |
7b67c857 | 1801 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1802 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e JHS |
1803 | struct xfrm_mark m; |
1804 | u32 mark = xfrm_mark_get(attrs, &m);; | |
53bc6b4d | 1805 | |
6f26b61e | 1806 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1807 | |
3a765aa5 | 1808 | err = -ENOENT; |
53bc6b4d JHS |
1809 | if (x == NULL) |
1810 | return err; | |
1811 | ||
53bc6b4d | 1812 | spin_lock_bh(&x->lock); |
3a765aa5 | 1813 | err = -EINVAL; |
53bc6b4d JHS |
1814 | if (x->km.state != XFRM_STATE_VALID) |
1815 | goto out; | |
1816 | km_state_expired(x, ue->hard, current->pid); | |
1817 | ||
161a09e7 | 1818 | if (ue->hard) { |
2532386f EP |
1819 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1820 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1821 | u32 sid = NETLINK_CB(skb).sid; | |
53bc6b4d | 1822 | __xfrm_state_delete(x); |
2532386f | 1823 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1824 | } |
3a765aa5 | 1825 | err = 0; |
53bc6b4d JHS |
1826 | out: |
1827 | spin_unlock_bh(&x->lock); | |
1828 | xfrm_state_put(x); | |
1829 | return err; | |
1830 | } | |
1831 | ||
22e70050 | 1832 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1833 | struct nlattr **attrs) |
980ebd25 | 1834 | { |
fc34acd3 | 1835 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1836 | struct xfrm_policy *xp; |
1837 | struct xfrm_user_tmpl *ut; | |
1838 | int i; | |
5424f32e | 1839 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 1840 | struct xfrm_mark mark; |
980ebd25 | 1841 | |
7b67c857 | 1842 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1843 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1844 | int err = -ENOMEM; |
1845 | ||
1846 | if (!x) | |
d8eb9307 | 1847 | goto nomem; |
980ebd25 | 1848 | |
6f26b61e JHS |
1849 | xfrm_mark_get(attrs, &mark); |
1850 | ||
980ebd25 | 1851 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
1852 | if (err) |
1853 | goto bad_policy; | |
980ebd25 JHS |
1854 | |
1855 | /* build an XP */ | |
fc34acd3 | 1856 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
1857 | if (!xp) |
1858 | goto free_state; | |
980ebd25 JHS |
1859 | |
1860 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1861 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1862 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
1863 | xp->mark.m = x->mark.m = mark.m; |
1864 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 1865 | ut = nla_data(rt); |
980ebd25 JHS |
1866 | /* extract the templates and for each call km_key */ |
1867 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1868 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1869 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1870 | x->props.mode = t->mode; | |
1871 | x->props.reqid = t->reqid; | |
1872 | x->props.family = ut->family; | |
1873 | t->aalgos = ua->aalgos; | |
1874 | t->ealgos = ua->ealgos; | |
1875 | t->calgos = ua->calgos; | |
1876 | err = km_query(x, t, xp); | |
1877 | ||
1878 | } | |
1879 | ||
1880 | kfree(x); | |
1881 | kfree(xp); | |
1882 | ||
1883 | return 0; | |
d8eb9307 IJ |
1884 | |
1885 | bad_policy: | |
62db5cfd | 1886 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
1887 | free_state: |
1888 | kfree(x); | |
1889 | nomem: | |
1890 | return err; | |
980ebd25 JHS |
1891 | } |
1892 | ||
5c79de6e | 1893 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 1894 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 1895 | struct xfrm_kmaddress *k, |
5424f32e | 1896 | struct nlattr **attrs, int *num) |
5c79de6e | 1897 | { |
5424f32e | 1898 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
1899 | struct xfrm_user_migrate *um; |
1900 | int i, num_migrate; | |
1901 | ||
13c1d189 AE |
1902 | if (k != NULL) { |
1903 | struct xfrm_user_kmaddress *uk; | |
1904 | ||
1905 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
1906 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
1907 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
1908 | k->family = uk->family; | |
1909 | k->reserved = uk->reserved; | |
1910 | } | |
1911 | ||
5424f32e TG |
1912 | um = nla_data(rt); |
1913 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
1914 | |
1915 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1916 | return -EINVAL; | |
1917 | ||
1918 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1919 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1920 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1921 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1922 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1923 | ||
1924 | ma->proto = um->proto; | |
1925 | ma->mode = um->mode; | |
1926 | ma->reqid = um->reqid; | |
1927 | ||
1928 | ma->old_family = um->old_family; | |
1929 | ma->new_family = um->new_family; | |
1930 | } | |
1931 | ||
1932 | *num = i; | |
1933 | return 0; | |
1934 | } | |
1935 | ||
1936 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1937 | struct nlattr **attrs) |
5c79de6e | 1938 | { |
7b67c857 | 1939 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 1940 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 1941 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
1942 | u8 type; |
1943 | int err; | |
1944 | int n = 0; | |
1945 | ||
35a7aa08 | 1946 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 1947 | return -EINVAL; |
5c79de6e | 1948 | |
13c1d189 AE |
1949 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
1950 | ||
5424f32e | 1951 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
1952 | if (err) |
1953 | return err; | |
1954 | ||
13c1d189 | 1955 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
1956 | if (err) |
1957 | return err; | |
1958 | ||
1959 | if (!n) | |
1960 | return 0; | |
1961 | ||
13c1d189 | 1962 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
1963 | |
1964 | return 0; | |
1965 | } | |
1966 | #else | |
1967 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1968 | struct nlattr **attrs) |
5c79de6e SS |
1969 | { |
1970 | return -ENOPROTOOPT; | |
1971 | } | |
1972 | #endif | |
1973 | ||
1974 | #ifdef CONFIG_XFRM_MIGRATE | |
1975 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1976 | { | |
1977 | struct xfrm_user_migrate um; | |
1978 | ||
1979 | memset(&um, 0, sizeof(um)); | |
1980 | um.proto = m->proto; | |
1981 | um.mode = m->mode; | |
1982 | um.reqid = m->reqid; | |
1983 | um.old_family = m->old_family; | |
1984 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1985 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1986 | um.new_family = m->new_family; | |
1987 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1988 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1989 | ||
c0144bea | 1990 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
1991 | } |
1992 | ||
13c1d189 AE |
1993 | static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb) |
1994 | { | |
1995 | struct xfrm_user_kmaddress uk; | |
1996 | ||
1997 | memset(&uk, 0, sizeof(uk)); | |
1998 | uk.family = k->family; | |
1999 | uk.reserved = k->reserved; | |
2000 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2001 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2002 | |
2003 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2004 | } | |
2005 | ||
2006 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2007 | { |
2008 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2009 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2010 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2011 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2012 | } |
2013 | ||
5c79de6e | 2014 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
13c1d189 AE |
2015 | int num_migrate, struct xfrm_kmaddress *k, |
2016 | struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e SS |
2017 | { |
2018 | struct xfrm_migrate *mp; | |
2019 | struct xfrm_userpolicy_id *pol_id; | |
2020 | struct nlmsghdr *nlh; | |
5c79de6e SS |
2021 | int i; |
2022 | ||
79b8b7f4 TG |
2023 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2024 | if (nlh == NULL) | |
2025 | return -EMSGSIZE; | |
5c79de6e | 2026 | |
7b67c857 | 2027 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2028 | /* copy data from selector, dir, and type to the pol_id */ |
2029 | memset(pol_id, 0, sizeof(*pol_id)); | |
2030 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2031 | pol_id->dir = dir; | |
2032 | ||
13c1d189 AE |
2033 | if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) |
2034 | goto nlmsg_failure; | |
2035 | ||
5c79de6e SS |
2036 | if (copy_to_user_policy_type(type, skb) < 0) |
2037 | goto nlmsg_failure; | |
2038 | ||
2039 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
2040 | if (copy_to_user_migrate(mp, skb) < 0) | |
2041 | goto nlmsg_failure; | |
2042 | } | |
2043 | ||
9825069d | 2044 | return nlmsg_end(skb, nlh); |
5c79de6e | 2045 | nlmsg_failure: |
9825069d TG |
2046 | nlmsg_cancel(skb, nlh); |
2047 | return -EMSGSIZE; | |
5c79de6e SS |
2048 | } |
2049 | ||
2050 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
2051 | struct xfrm_migrate *m, int num_migrate, |
2052 | struct xfrm_kmaddress *k) | |
5c79de6e | 2053 | { |
a6483b79 | 2054 | struct net *net = &init_net; |
5c79de6e | 2055 | struct sk_buff *skb; |
5c79de6e | 2056 | |
13c1d189 | 2057 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2058 | if (skb == NULL) |
2059 | return -ENOMEM; | |
2060 | ||
2061 | /* build migrate */ | |
13c1d189 | 2062 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2063 | BUG(); |
2064 | ||
a6483b79 | 2065 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2066 | } |
2067 | #else | |
2068 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
2069 | struct xfrm_migrate *m, int num_migrate, |
2070 | struct xfrm_kmaddress *k) | |
5c79de6e SS |
2071 | { |
2072 | return -ENOPROTOOPT; | |
2073 | } | |
2074 | #endif | |
d51d081d | 2075 | |
a7bd9a45 | 2076 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2077 | |
2078 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2079 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2080 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2081 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2082 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2083 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2084 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2085 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2086 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2087 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2088 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2089 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2090 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2091 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2092 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2093 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2094 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2095 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2096 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2097 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2098 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2099 | }; |
2100 | ||
492b558b TG |
2101 | #undef XMSGSIZE |
2102 | ||
cf5cb79f | 2103 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2104 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2105 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2106 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2107 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2108 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2109 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2110 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2111 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2112 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2113 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2114 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2115 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2116 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2117 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2118 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2119 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2120 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2121 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2122 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2123 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2124 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
cf5cb79f TG |
2125 | }; |
2126 | ||
1da177e4 | 2127 | static struct xfrm_link { |
5424f32e | 2128 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2129 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2130 | int (*done)(struct netlink_callback *); |
492b558b TG |
2131 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2132 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2133 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2134 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2135 | .dump = xfrm_dump_sa, |
2136 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2137 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2138 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2139 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2140 | .dump = xfrm_dump_policy, |
2141 | .done = xfrm_dump_policy_done }, | |
492b558b | 2142 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2143 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2144 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2145 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2146 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2147 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2148 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2149 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2150 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2151 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2152 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2153 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2154 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2155 | }; |
2156 | ||
1d00a4eb | 2157 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2158 | { |
a6483b79 | 2159 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2160 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2161 | struct xfrm_link *link; |
a7bd9a45 | 2162 | int type, err; |
1da177e4 | 2163 | |
1da177e4 | 2164 | type = nlh->nlmsg_type; |
1da177e4 | 2165 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2166 | return -EINVAL; |
1da177e4 LT |
2167 | |
2168 | type -= XFRM_MSG_BASE; | |
2169 | link = &xfrm_dispatch[type]; | |
2170 | ||
2171 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
2172 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
2173 | return -EPERM; | |
1da177e4 | 2174 | |
492b558b TG |
2175 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2176 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
2177 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 2178 | if (link->dump == NULL) |
1d00a4eb | 2179 | return -EINVAL; |
88fc2c84 | 2180 | |
a6483b79 | 2181 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done); |
1da177e4 LT |
2182 | } |
2183 | ||
35a7aa08 | 2184 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2185 | xfrma_policy); |
a7bd9a45 TG |
2186 | if (err < 0) |
2187 | return err; | |
1da177e4 LT |
2188 | |
2189 | if (link->doit == NULL) | |
1d00a4eb | 2190 | return -EINVAL; |
1da177e4 | 2191 | |
5424f32e | 2192 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2193 | } |
2194 | ||
cd40b7d3 | 2195 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2196 | { |
cd40b7d3 DL |
2197 | mutex_lock(&xfrm_cfg_mutex); |
2198 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2199 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2200 | } |
2201 | ||
7deb2264 TG |
2202 | static inline size_t xfrm_expire_msgsize(void) |
2203 | { | |
6f26b61e JHS |
2204 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2205 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2206 | } |
2207 | ||
d51d081d | 2208 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
2209 | { |
2210 | struct xfrm_user_expire *ue; | |
2211 | struct nlmsghdr *nlh; | |
1da177e4 | 2212 | |
79b8b7f4 TG |
2213 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2214 | if (nlh == NULL) | |
2215 | return -EMSGSIZE; | |
1da177e4 | 2216 | |
7b67c857 | 2217 | ue = nlmsg_data(nlh); |
1da177e4 | 2218 | copy_to_user_state(x, &ue->state); |
d51d081d | 2219 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2220 | |
6f26b61e JHS |
2221 | if (xfrm_mark_put(skb, &x->mark)) |
2222 | goto nla_put_failure; | |
2223 | ||
9825069d | 2224 | return nlmsg_end(skb, nlh); |
6f26b61e JHS |
2225 | |
2226 | nla_put_failure: | |
2227 | return -EMSGSIZE; | |
1da177e4 LT |
2228 | } |
2229 | ||
26b15dad | 2230 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 | 2231 | { |
fc34acd3 | 2232 | struct net *net = xs_net(x); |
1da177e4 LT |
2233 | struct sk_buff *skb; |
2234 | ||
7deb2264 | 2235 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2236 | if (skb == NULL) |
2237 | return -ENOMEM; | |
2238 | ||
6f26b61e JHS |
2239 | if (build_expire(skb, x, c) < 0) { |
2240 | kfree_skb(skb); | |
2241 | return -EMSGSIZE; | |
2242 | } | |
1da177e4 | 2243 | |
a6483b79 | 2244 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2245 | } |
2246 | ||
d51d081d JHS |
2247 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
2248 | { | |
fc34acd3 | 2249 | struct net *net = xs_net(x); |
d51d081d | 2250 | struct sk_buff *skb; |
d51d081d | 2251 | |
7deb2264 | 2252 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
2253 | if (skb == NULL) |
2254 | return -ENOMEM; | |
2255 | ||
2256 | if (build_aevent(skb, x, c) < 0) | |
2257 | BUG(); | |
2258 | ||
a6483b79 | 2259 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2260 | } |
2261 | ||
26b15dad JHS |
2262 | static int xfrm_notify_sa_flush(struct km_event *c) |
2263 | { | |
7067802e | 2264 | struct net *net = c->net; |
26b15dad JHS |
2265 | struct xfrm_usersa_flush *p; |
2266 | struct nlmsghdr *nlh; | |
2267 | struct sk_buff *skb; | |
7deb2264 | 2268 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2269 | |
7deb2264 | 2270 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2271 | if (skb == NULL) |
2272 | return -ENOMEM; | |
26b15dad | 2273 | |
79b8b7f4 TG |
2274 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2275 | if (nlh == NULL) { | |
2276 | kfree_skb(skb); | |
2277 | return -EMSGSIZE; | |
2278 | } | |
26b15dad | 2279 | |
7b67c857 | 2280 | p = nlmsg_data(nlh); |
bf08867f | 2281 | p->proto = c->data.proto; |
26b15dad | 2282 | |
9825069d | 2283 | nlmsg_end(skb, nlh); |
26b15dad | 2284 | |
a6483b79 | 2285 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2286 | } |
2287 | ||
7deb2264 | 2288 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2289 | { |
7deb2264 | 2290 | size_t l = 0; |
1a6509d9 HX |
2291 | if (x->aead) |
2292 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2293 | if (x->aalg) { |
2294 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2295 | (x->aalg->alg_key_len + 7) / 8); | |
2296 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2297 | } | |
26b15dad | 2298 | if (x->ealg) |
0f99be0d | 2299 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2300 | if (x->calg) |
7deb2264 | 2301 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2302 | if (x->encap) |
7deb2264 | 2303 | l += nla_total_size(sizeof(*x->encap)); |
68325d3b HX |
2304 | if (x->security) |
2305 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2306 | x->security->ctx_len); | |
2307 | if (x->coaddr) | |
2308 | l += nla_total_size(sizeof(*x->coaddr)); | |
2309 | ||
d26f3984 HX |
2310 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2311 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2312 | |
2313 | return l; | |
2314 | } | |
2315 | ||
2316 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2317 | { | |
fc34acd3 | 2318 | struct net *net = xs_net(x); |
26b15dad | 2319 | struct xfrm_usersa_info *p; |
0603eac0 | 2320 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2321 | struct nlmsghdr *nlh; |
2322 | struct sk_buff *skb; | |
26b15dad | 2323 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2324 | int headlen; |
2325 | ||
2326 | headlen = sizeof(*p); | |
2327 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2328 | len += nla_total_size(headlen); |
0603eac0 | 2329 | headlen = sizeof(*id); |
6f26b61e | 2330 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2331 | } |
7deb2264 | 2332 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2333 | |
7deb2264 | 2334 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2335 | if (skb == NULL) |
2336 | return -ENOMEM; | |
26b15dad | 2337 | |
79b8b7f4 TG |
2338 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2339 | if (nlh == NULL) | |
c0144bea | 2340 | goto nla_put_failure; |
26b15dad | 2341 | |
7b67c857 | 2342 | p = nlmsg_data(nlh); |
0603eac0 | 2343 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2344 | struct nlattr *attr; |
2345 | ||
7b67c857 | 2346 | id = nlmsg_data(nlh); |
0603eac0 HX |
2347 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2348 | id->spi = x->id.spi; | |
2349 | id->family = x->props.family; | |
2350 | id->proto = x->id.proto; | |
2351 | ||
c0144bea TG |
2352 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2353 | if (attr == NULL) | |
2354 | goto nla_put_failure; | |
2355 | ||
2356 | p = nla_data(attr); | |
0603eac0 HX |
2357 | } |
2358 | ||
68325d3b HX |
2359 | if (copy_to_user_state_extra(x, p, skb)) |
2360 | goto nla_put_failure; | |
26b15dad | 2361 | |
9825069d | 2362 | nlmsg_end(skb, nlh); |
26b15dad | 2363 | |
a6483b79 | 2364 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2365 | |
c0144bea | 2366 | nla_put_failure: |
68325d3b HX |
2367 | /* Somebody screwed up with xfrm_sa_len! */ |
2368 | WARN_ON(1); | |
26b15dad JHS |
2369 | kfree_skb(skb); |
2370 | return -1; | |
2371 | } | |
2372 | ||
2373 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2374 | { | |
2375 | ||
2376 | switch (c->event) { | |
f60f6b8f | 2377 | case XFRM_MSG_EXPIRE: |
26b15dad | 2378 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2379 | case XFRM_MSG_NEWAE: |
2380 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2381 | case XFRM_MSG_DELSA: |
2382 | case XFRM_MSG_UPDSA: | |
2383 | case XFRM_MSG_NEWSA: | |
26b15dad | 2384 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2385 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2386 | return xfrm_notify_sa_flush(c); |
2387 | default: | |
62db5cfd | 2388 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2389 | c->event); | |
2390 | break; | |
26b15dad JHS |
2391 | } |
2392 | ||
2393 | return 0; | |
2394 | ||
2395 | } | |
2396 | ||
7deb2264 TG |
2397 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2398 | struct xfrm_policy *xp) | |
2399 | { | |
2400 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2401 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2402 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2403 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2404 | + userpolicy_type_attrsize(); | |
2405 | } | |
2406 | ||
1da177e4 LT |
2407 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2408 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2409 | int dir) | |
2410 | { | |
2411 | struct xfrm_user_acquire *ua; | |
2412 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2413 | __u32 seq = xfrm_get_acqseq(); |
2414 | ||
79b8b7f4 TG |
2415 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2416 | if (nlh == NULL) | |
2417 | return -EMSGSIZE; | |
1da177e4 | 2418 | |
7b67c857 | 2419 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2420 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2421 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2422 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2423 | copy_to_user_policy(xp, &ua->policy, dir); | |
2424 | ua->aalgos = xt->aalgos; | |
2425 | ua->ealgos = xt->ealgos; | |
2426 | ua->calgos = xt->calgos; | |
2427 | ua->seq = x->km.seq = seq; | |
2428 | ||
2429 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2430 | goto nlmsg_failure; | |
0d681623 | 2431 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2432 | goto nlmsg_failure; |
1459bb36 | 2433 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2434 | goto nlmsg_failure; |
295fae56 JHS |
2435 | if (xfrm_mark_put(skb, &xp->mark)) |
2436 | goto nla_put_failure; | |
1da177e4 | 2437 | |
9825069d | 2438 | return nlmsg_end(skb, nlh); |
1da177e4 | 2439 | |
295fae56 | 2440 | nla_put_failure: |
1da177e4 | 2441 | nlmsg_failure: |
9825069d TG |
2442 | nlmsg_cancel(skb, nlh); |
2443 | return -EMSGSIZE; | |
1da177e4 LT |
2444 | } |
2445 | ||
2446 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2447 | struct xfrm_policy *xp, int dir) | |
2448 | { | |
a6483b79 | 2449 | struct net *net = xs_net(x); |
1da177e4 | 2450 | struct sk_buff *skb; |
1da177e4 | 2451 | |
7deb2264 | 2452 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2453 | if (skb == NULL) |
2454 | return -ENOMEM; | |
2455 | ||
2456 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2457 | BUG(); | |
2458 | ||
a6483b79 | 2459 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2460 | } |
2461 | ||
2462 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2463 | * or more templates. | |
2464 | */ | |
cb969f07 | 2465 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2466 | u8 *data, int len, int *dir) |
2467 | { | |
fc34acd3 | 2468 | struct net *net = sock_net(sk); |
1da177e4 LT |
2469 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2470 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2471 | struct xfrm_policy *xp; | |
2472 | int nr; | |
2473 | ||
cb969f07 | 2474 | switch (sk->sk_family) { |
1da177e4 LT |
2475 | case AF_INET: |
2476 | if (opt != IP_XFRM_POLICY) { | |
2477 | *dir = -EOPNOTSUPP; | |
2478 | return NULL; | |
2479 | } | |
2480 | break; | |
2481 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2482 | case AF_INET6: | |
2483 | if (opt != IPV6_XFRM_POLICY) { | |
2484 | *dir = -EOPNOTSUPP; | |
2485 | return NULL; | |
2486 | } | |
2487 | break; | |
2488 | #endif | |
2489 | default: | |
2490 | *dir = -EINVAL; | |
2491 | return NULL; | |
2492 | } | |
2493 | ||
2494 | *dir = -EINVAL; | |
2495 | ||
2496 | if (len < sizeof(*p) || | |
2497 | verify_newpolicy_info(p)) | |
2498 | return NULL; | |
2499 | ||
2500 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2501 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2502 | return NULL; |
2503 | ||
a4f1bac6 HX |
2504 | if (p->dir > XFRM_POLICY_OUT) |
2505 | return NULL; | |
2506 | ||
2f09a4d5 | 2507 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2508 | if (xp == NULL) { |
2509 | *dir = -ENOBUFS; | |
2510 | return NULL; | |
2511 | } | |
2512 | ||
2513 | copy_from_user_policy(xp, p); | |
f7b6983f | 2514 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2515 | copy_templates(xp, ut, nr); |
2516 | ||
2517 | *dir = p->dir; | |
2518 | ||
2519 | return xp; | |
2520 | } | |
2521 | ||
7deb2264 TG |
2522 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2523 | { | |
2524 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2525 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2526 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2527 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2528 | + userpolicy_type_attrsize(); |
2529 | } | |
2530 | ||
1da177e4 | 2531 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
d51d081d | 2532 | int dir, struct km_event *c) |
1da177e4 LT |
2533 | { |
2534 | struct xfrm_user_polexpire *upe; | |
2535 | struct nlmsghdr *nlh; | |
d51d081d | 2536 | int hard = c->data.hard; |
1da177e4 | 2537 | |
79b8b7f4 TG |
2538 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2539 | if (nlh == NULL) | |
2540 | return -EMSGSIZE; | |
1da177e4 | 2541 | |
7b67c857 | 2542 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2543 | copy_to_user_policy(xp, &upe->pol, dir); |
2544 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2545 | goto nlmsg_failure; | |
df71837d TJ |
2546 | if (copy_to_user_sec_ctx(xp, skb)) |
2547 | goto nlmsg_failure; | |
1459bb36 | 2548 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2549 | goto nlmsg_failure; |
295fae56 JHS |
2550 | if (xfrm_mark_put(skb, &xp->mark)) |
2551 | goto nla_put_failure; | |
1da177e4 LT |
2552 | upe->hard = !!hard; |
2553 | ||
9825069d | 2554 | return nlmsg_end(skb, nlh); |
1da177e4 | 2555 | |
295fae56 | 2556 | nla_put_failure: |
1da177e4 | 2557 | nlmsg_failure: |
9825069d TG |
2558 | nlmsg_cancel(skb, nlh); |
2559 | return -EMSGSIZE; | |
1da177e4 LT |
2560 | } |
2561 | ||
26b15dad | 2562 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 | 2563 | { |
fc34acd3 | 2564 | struct net *net = xp_net(xp); |
1da177e4 | 2565 | struct sk_buff *skb; |
1da177e4 | 2566 | |
7deb2264 | 2567 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2568 | if (skb == NULL) |
2569 | return -ENOMEM; | |
2570 | ||
d51d081d | 2571 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2572 | BUG(); |
2573 | ||
a6483b79 | 2574 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2575 | } |
2576 | ||
26b15dad JHS |
2577 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2578 | { | |
fc34acd3 | 2579 | struct net *net = xp_net(xp); |
26b15dad | 2580 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2581 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2582 | struct nlmsghdr *nlh; |
2583 | struct sk_buff *skb; | |
7deb2264 | 2584 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2585 | int headlen; |
2586 | ||
2587 | headlen = sizeof(*p); | |
2588 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2589 | len += nla_total_size(headlen); |
0603eac0 HX |
2590 | headlen = sizeof(*id); |
2591 | } | |
cfbfd45a | 2592 | len += userpolicy_type_attrsize(); |
295fae56 | 2593 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2594 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2595 | |
7deb2264 | 2596 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2597 | if (skb == NULL) |
2598 | return -ENOMEM; | |
26b15dad | 2599 | |
79b8b7f4 TG |
2600 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2601 | if (nlh == NULL) | |
2602 | goto nlmsg_failure; | |
26b15dad | 2603 | |
7b67c857 | 2604 | p = nlmsg_data(nlh); |
0603eac0 | 2605 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2606 | struct nlattr *attr; |
2607 | ||
7b67c857 | 2608 | id = nlmsg_data(nlh); |
0603eac0 HX |
2609 | memset(id, 0, sizeof(*id)); |
2610 | id->dir = dir; | |
2611 | if (c->data.byid) | |
2612 | id->index = xp->index; | |
2613 | else | |
2614 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2615 | ||
c0144bea TG |
2616 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2617 | if (attr == NULL) | |
2618 | goto nlmsg_failure; | |
2619 | ||
2620 | p = nla_data(attr); | |
0603eac0 | 2621 | } |
26b15dad | 2622 | |
26b15dad JHS |
2623 | copy_to_user_policy(xp, p, dir); |
2624 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2625 | goto nlmsg_failure; | |
1459bb36 | 2626 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2627 | goto nlmsg_failure; |
26b15dad | 2628 | |
295fae56 JHS |
2629 | if (xfrm_mark_put(skb, &xp->mark)) |
2630 | goto nla_put_failure; | |
2631 | ||
9825069d | 2632 | nlmsg_end(skb, nlh); |
26b15dad | 2633 | |
a6483b79 | 2634 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2635 | |
295fae56 | 2636 | nla_put_failure: |
26b15dad JHS |
2637 | nlmsg_failure: |
2638 | kfree_skb(skb); | |
2639 | return -1; | |
2640 | } | |
2641 | ||
2642 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2643 | { | |
7067802e | 2644 | struct net *net = c->net; |
26b15dad JHS |
2645 | struct nlmsghdr *nlh; |
2646 | struct sk_buff *skb; | |
26b15dad | 2647 | |
7deb2264 | 2648 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2649 | if (skb == NULL) |
2650 | return -ENOMEM; | |
26b15dad | 2651 | |
79b8b7f4 TG |
2652 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2653 | if (nlh == NULL) | |
2654 | goto nlmsg_failure; | |
0c51f53c JHS |
2655 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2656 | goto nlmsg_failure; | |
26b15dad | 2657 | |
9825069d | 2658 | nlmsg_end(skb, nlh); |
26b15dad | 2659 | |
a6483b79 | 2660 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2661 | |
2662 | nlmsg_failure: | |
2663 | kfree_skb(skb); | |
2664 | return -1; | |
2665 | } | |
2666 | ||
2667 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2668 | { | |
2669 | ||
2670 | switch (c->event) { | |
f60f6b8f HX |
2671 | case XFRM_MSG_NEWPOLICY: |
2672 | case XFRM_MSG_UPDPOLICY: | |
2673 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2674 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2675 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2676 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2677 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2678 | return xfrm_exp_policy_notify(xp, dir, c); |
2679 | default: | |
62db5cfd | 2680 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2681 | c->event); | |
26b15dad JHS |
2682 | } |
2683 | ||
2684 | return 0; | |
2685 | ||
2686 | } | |
2687 | ||
7deb2264 TG |
2688 | static inline size_t xfrm_report_msgsize(void) |
2689 | { | |
2690 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2691 | } | |
2692 | ||
97a64b45 MN |
2693 | static int build_report(struct sk_buff *skb, u8 proto, |
2694 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2695 | { | |
2696 | struct xfrm_user_report *ur; | |
2697 | struct nlmsghdr *nlh; | |
97a64b45 | 2698 | |
79b8b7f4 TG |
2699 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2700 | if (nlh == NULL) | |
2701 | return -EMSGSIZE; | |
97a64b45 | 2702 | |
7b67c857 | 2703 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2704 | ur->proto = proto; |
2705 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2706 | ||
2707 | if (addr) | |
c0144bea | 2708 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2709 | |
9825069d | 2710 | return nlmsg_end(skb, nlh); |
97a64b45 | 2711 | |
c0144bea | 2712 | nla_put_failure: |
9825069d TG |
2713 | nlmsg_cancel(skb, nlh); |
2714 | return -EMSGSIZE; | |
97a64b45 MN |
2715 | } |
2716 | ||
db983c11 AD |
2717 | static int xfrm_send_report(struct net *net, u8 proto, |
2718 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2719 | { |
2720 | struct sk_buff *skb; | |
97a64b45 | 2721 | |
7deb2264 | 2722 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2723 | if (skb == NULL) |
2724 | return -ENOMEM; | |
2725 | ||
2726 | if (build_report(skb, proto, sel, addr) < 0) | |
2727 | BUG(); | |
2728 | ||
a6483b79 | 2729 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2730 | } |
2731 | ||
3a2dfbe8 MW |
2732 | static inline size_t xfrm_mapping_msgsize(void) |
2733 | { | |
2734 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2735 | } | |
2736 | ||
2737 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2738 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2739 | { | |
2740 | struct xfrm_user_mapping *um; | |
2741 | struct nlmsghdr *nlh; | |
2742 | ||
2743 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2744 | if (nlh == NULL) | |
2745 | return -EMSGSIZE; | |
2746 | ||
2747 | um = nlmsg_data(nlh); | |
2748 | ||
2749 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2750 | um->id.spi = x->id.spi; | |
2751 | um->id.family = x->props.family; | |
2752 | um->id.proto = x->id.proto; | |
2753 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2754 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2755 | um->new_sport = new_sport; | |
2756 | um->old_sport = x->encap->encap_sport; | |
2757 | um->reqid = x->props.reqid; | |
2758 | ||
2759 | return nlmsg_end(skb, nlh); | |
2760 | } | |
2761 | ||
2762 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2763 | __be16 sport) | |
2764 | { | |
a6483b79 | 2765 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2766 | struct sk_buff *skb; |
2767 | ||
2768 | if (x->id.proto != IPPROTO_ESP) | |
2769 | return -EINVAL; | |
2770 | ||
2771 | if (!x->encap) | |
2772 | return -EINVAL; | |
2773 | ||
2774 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2775 | if (skb == NULL) | |
2776 | return -ENOMEM; | |
2777 | ||
2778 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2779 | BUG(); | |
2780 | ||
a6483b79 | 2781 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2782 | } |
2783 | ||
1da177e4 LT |
2784 | static struct xfrm_mgr netlink_mgr = { |
2785 | .id = "netlink", | |
2786 | .notify = xfrm_send_state_notify, | |
2787 | .acquire = xfrm_send_acquire, | |
2788 | .compile_policy = xfrm_compile_policy, | |
2789 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2790 | .report = xfrm_send_report, |
5c79de6e | 2791 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2792 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2793 | }; |
2794 | ||
a6483b79 | 2795 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2796 | { |
be33690d PM |
2797 | struct sock *nlsk; |
2798 | ||
a6483b79 | 2799 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2800 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2801 | if (nlsk == NULL) |
1da177e4 | 2802 | return -ENOMEM; |
d79d792e | 2803 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
a6483b79 | 2804 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2805 | return 0; |
2806 | } | |
2807 | ||
d79d792e | 2808 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 2809 | { |
d79d792e EB |
2810 | struct net *net; |
2811 | list_for_each_entry(net, net_exit_list, exit_list) | |
2812 | rcu_assign_pointer(net->xfrm.nlsk, NULL); | |
2813 | synchronize_net(); | |
2814 | list_for_each_entry(net, net_exit_list, exit_list) | |
2815 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
2816 | } |
2817 | ||
a6483b79 | 2818 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
2819 | .init = xfrm_user_net_init, |
2820 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
2821 | }; |
2822 | ||
2823 | static int __init xfrm_user_init(void) | |
2824 | { | |
2825 | int rv; | |
2826 | ||
2827 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
2828 | ||
2829 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
2830 | if (rv < 0) | |
2831 | return rv; | |
2832 | rv = xfrm_register_km(&netlink_mgr); | |
2833 | if (rv < 0) | |
2834 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2835 | return rv; | |
2836 | } | |
2837 | ||
2838 | static void __exit xfrm_user_exit(void) | |
2839 | { | |
2840 | xfrm_unregister_km(&netlink_mgr); | |
2841 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2842 | } | |
2843 | ||
1da177e4 LT |
2844 | module_init(xfrm_user_init); |
2845 | module_exit(xfrm_user_exit); | |
2846 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2847 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2848 |