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> |
fa6dd8a2 | 29 | #include <net/ah.h> |
1da177e4 | 30 | #include <asm/uaccess.h> |
dfd56b8b | 31 | #if IS_ENABLED(CONFIG_IPV6) |
e23c7194 MN |
32 | #include <linux/in6.h> |
33 | #endif | |
1da177e4 | 34 | |
1a6509d9 HX |
35 | static inline int aead_len(struct xfrm_algo_aead *alg) |
36 | { | |
37 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
38 | } | |
39 | ||
5424f32e | 40 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 41 | { |
5424f32e | 42 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
43 | struct xfrm_algo *algp; |
44 | ||
45 | if (!rt) | |
46 | return 0; | |
47 | ||
5424f32e | 48 | algp = nla_data(rt); |
0f99be0d | 49 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
50 | return -EINVAL; |
51 | ||
1da177e4 LT |
52 | switch (type) { |
53 | case XFRMA_ALG_AUTH: | |
1da177e4 | 54 | case XFRMA_ALG_CRYPT: |
1da177e4 | 55 | case XFRMA_ALG_COMP: |
1da177e4 LT |
56 | break; |
57 | ||
58 | default: | |
59 | return -EINVAL; | |
3ff50b79 | 60 | } |
1da177e4 LT |
61 | |
62 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
63 | return 0; | |
64 | } | |
65 | ||
4447bb33 MW |
66 | static int verify_auth_trunc(struct nlattr **attrs) |
67 | { | |
68 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; | |
69 | struct xfrm_algo_auth *algp; | |
70 | ||
71 | if (!rt) | |
72 | return 0; | |
73 | ||
74 | algp = nla_data(rt); | |
75 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) | |
76 | return -EINVAL; | |
77 | ||
78 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
79 | return 0; | |
80 | } | |
81 | ||
1a6509d9 HX |
82 | static int verify_aead(struct nlattr **attrs) |
83 | { | |
84 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
85 | struct xfrm_algo_aead *algp; | |
86 | ||
87 | if (!rt) | |
88 | return 0; | |
89 | ||
90 | algp = nla_data(rt); | |
91 | if (nla_len(rt) < aead_len(algp)) | |
92 | return -EINVAL; | |
93 | ||
94 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
95 | return 0; | |
96 | } | |
97 | ||
5424f32e | 98 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
99 | xfrm_address_t **addrp) |
100 | { | |
5424f32e | 101 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 102 | |
cf5cb79f | 103 | if (rt && addrp) |
5424f32e | 104 | *addrp = nla_data(rt); |
eb2971b6 | 105 | } |
df71837d | 106 | |
5424f32e | 107 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 108 | { |
5424f32e | 109 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 110 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
111 | |
112 | if (!rt) | |
113 | return 0; | |
114 | ||
5424f32e | 115 | uctx = nla_data(rt); |
cf5cb79f | 116 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
117 | return -EINVAL; |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
d8647b79 SK |
122 | static inline int verify_replay(struct xfrm_usersa_info *p, |
123 | struct nlattr **attrs) | |
124 | { | |
125 | struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; | |
126 | ||
7833aa05 SK |
127 | if ((p->flags & XFRM_STATE_ESN) && !rt) |
128 | return -EINVAL; | |
129 | ||
d8647b79 SK |
130 | if (!rt) |
131 | return 0; | |
132 | ||
02aadf72 SK |
133 | if (p->id.proto != IPPROTO_ESP) |
134 | return -EINVAL; | |
135 | ||
d8647b79 SK |
136 | if (p->replay_window != 0) |
137 | return -EINVAL; | |
138 | ||
139 | return 0; | |
140 | } | |
df71837d | 141 | |
1da177e4 | 142 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 143 | struct nlattr **attrs) |
1da177e4 LT |
144 | { |
145 | int err; | |
146 | ||
147 | err = -EINVAL; | |
148 | switch (p->family) { | |
149 | case AF_INET: | |
150 | break; | |
151 | ||
152 | case AF_INET6: | |
dfd56b8b | 153 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
154 | break; |
155 | #else | |
156 | err = -EAFNOSUPPORT; | |
157 | goto out; | |
158 | #endif | |
159 | ||
160 | default: | |
161 | goto out; | |
3ff50b79 | 162 | } |
1da177e4 LT |
163 | |
164 | err = -EINVAL; | |
165 | switch (p->id.proto) { | |
166 | case IPPROTO_AH: | |
4447bb33 MW |
167 | if ((!attrs[XFRMA_ALG_AUTH] && |
168 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 169 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 170 | attrs[XFRMA_ALG_CRYPT] || |
35d2856b MW |
171 | attrs[XFRMA_ALG_COMP] || |
172 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
173 | goto out; |
174 | break; | |
175 | ||
176 | case IPPROTO_ESP: | |
1a6509d9 HX |
177 | if (attrs[XFRMA_ALG_COMP]) |
178 | goto out; | |
179 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 180 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
181 | !attrs[XFRMA_ALG_CRYPT] && |
182 | !attrs[XFRMA_ALG_AEAD]) | |
183 | goto out; | |
184 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 185 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
186 | attrs[XFRMA_ALG_CRYPT]) && |
187 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 | 188 | goto out; |
35d2856b MW |
189 | if (attrs[XFRMA_TFCPAD] && |
190 | p->mode != XFRM_MODE_TUNNEL) | |
191 | goto out; | |
1da177e4 LT |
192 | break; |
193 | ||
194 | case IPPROTO_COMP: | |
35a7aa08 | 195 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 196 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 197 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 198 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35d2856b MW |
199 | attrs[XFRMA_ALG_CRYPT] || |
200 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
201 | goto out; |
202 | break; | |
203 | ||
dfd56b8b | 204 | #if IS_ENABLED(CONFIG_IPV6) |
e23c7194 MN |
205 | case IPPROTO_DSTOPTS: |
206 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
207 | if (attrs[XFRMA_ALG_COMP] || |
208 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 209 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 210 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
211 | attrs[XFRMA_ALG_CRYPT] || |
212 | attrs[XFRMA_ENCAP] || | |
213 | attrs[XFRMA_SEC_CTX] || | |
35d2856b | 214 | attrs[XFRMA_TFCPAD] || |
35a7aa08 | 215 | !attrs[XFRMA_COADDR]) |
e23c7194 MN |
216 | goto out; |
217 | break; | |
218 | #endif | |
219 | ||
1da177e4 LT |
220 | default: |
221 | goto out; | |
3ff50b79 | 222 | } |
1da177e4 | 223 | |
1a6509d9 HX |
224 | if ((err = verify_aead(attrs))) |
225 | goto out; | |
4447bb33 MW |
226 | if ((err = verify_auth_trunc(attrs))) |
227 | goto out; | |
35a7aa08 | 228 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 229 | goto out; |
35a7aa08 | 230 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 231 | goto out; |
35a7aa08 | 232 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 233 | goto out; |
35a7aa08 | 234 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 235 | goto out; |
d8647b79 SK |
236 | if ((err = verify_replay(p, attrs))) |
237 | goto out; | |
1da177e4 LT |
238 | |
239 | err = -EINVAL; | |
240 | switch (p->mode) { | |
7e49e6de MN |
241 | case XFRM_MODE_TRANSPORT: |
242 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 243 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 244 | case XFRM_MODE_BEET: |
1da177e4 LT |
245 | break; |
246 | ||
247 | default: | |
248 | goto out; | |
3ff50b79 | 249 | } |
1da177e4 LT |
250 | |
251 | err = 0; | |
252 | ||
253 | out: | |
254 | return err; | |
255 | } | |
256 | ||
257 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
6f2f19ed | 258 | struct xfrm_algo_desc *(*get_byname)(const char *, int), |
5424f32e | 259 | struct nlattr *rta) |
1da177e4 | 260 | { |
1da177e4 LT |
261 | struct xfrm_algo *p, *ualg; |
262 | struct xfrm_algo_desc *algo; | |
263 | ||
264 | if (!rta) | |
265 | return 0; | |
266 | ||
5424f32e | 267 | ualg = nla_data(rta); |
1da177e4 LT |
268 | |
269 | algo = get_byname(ualg->alg_name, 1); | |
270 | if (!algo) | |
271 | return -ENOSYS; | |
272 | *props = algo->desc.sadb_alg_id; | |
273 | ||
0f99be0d | 274 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
275 | if (!p) |
276 | return -ENOMEM; | |
277 | ||
04ff1260 | 278 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
279 | *algpp = p; |
280 | return 0; | |
281 | } | |
282 | ||
4447bb33 MW |
283 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
284 | struct nlattr *rta) | |
285 | { | |
286 | struct xfrm_algo *ualg; | |
287 | struct xfrm_algo_auth *p; | |
288 | struct xfrm_algo_desc *algo; | |
289 | ||
290 | if (!rta) | |
291 | return 0; | |
292 | ||
293 | ualg = nla_data(rta); | |
294 | ||
295 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
296 | if (!algo) | |
297 | return -ENOSYS; | |
298 | *props = algo->desc.sadb_alg_id; | |
299 | ||
300 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
301 | if (!p) | |
302 | return -ENOMEM; | |
303 | ||
304 | strcpy(p->alg_name, algo->name); | |
305 | p->alg_key_len = ualg->alg_key_len; | |
306 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
307 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
308 | ||
309 | *algpp = p; | |
310 | return 0; | |
311 | } | |
312 | ||
313 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
314 | struct nlattr *rta) | |
315 | { | |
316 | struct xfrm_algo_auth *p, *ualg; | |
317 | struct xfrm_algo_desc *algo; | |
318 | ||
319 | if (!rta) | |
320 | return 0; | |
321 | ||
322 | ualg = nla_data(rta); | |
323 | ||
324 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
325 | if (!algo) | |
326 | return -ENOSYS; | |
fa6dd8a2 ND |
327 | if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN || |
328 | ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) | |
4447bb33 MW |
329 | return -EINVAL; |
330 | *props = algo->desc.sadb_alg_id; | |
331 | ||
332 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
333 | if (!p) | |
334 | return -ENOMEM; | |
335 | ||
336 | strcpy(p->alg_name, algo->name); | |
337 | if (!p->alg_trunc_len) | |
338 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
339 | ||
340 | *algpp = p; | |
341 | return 0; | |
342 | } | |
343 | ||
1a6509d9 HX |
344 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
345 | struct nlattr *rta) | |
346 | { | |
347 | struct xfrm_algo_aead *p, *ualg; | |
348 | struct xfrm_algo_desc *algo; | |
349 | ||
350 | if (!rta) | |
351 | return 0; | |
352 | ||
353 | ualg = nla_data(rta); | |
354 | ||
355 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
356 | if (!algo) | |
357 | return -ENOSYS; | |
358 | *props = algo->desc.sadb_alg_id; | |
359 | ||
360 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
361 | if (!p) | |
362 | return -ENOMEM; | |
363 | ||
364 | strcpy(p->alg_name, algo->name); | |
365 | *algpp = p; | |
366 | return 0; | |
367 | } | |
368 | ||
e2b19125 SK |
369 | static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, |
370 | struct nlattr *rp) | |
371 | { | |
372 | struct xfrm_replay_state_esn *up; | |
373 | ||
374 | if (!replay_esn || !rp) | |
375 | return 0; | |
376 | ||
377 | up = nla_data(rp); | |
378 | ||
379 | if (xfrm_replay_state_esn_len(replay_esn) != | |
380 | xfrm_replay_state_esn_len(up)) | |
381 | return -EINVAL; | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
d8647b79 SK |
386 | static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, |
387 | struct xfrm_replay_state_esn **preplay_esn, | |
388 | struct nlattr *rta) | |
389 | { | |
390 | struct xfrm_replay_state_esn *p, *pp, *up; | |
391 | ||
392 | if (!rta) | |
393 | return 0; | |
394 | ||
395 | up = nla_data(rta); | |
396 | ||
397 | p = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL); | |
398 | if (!p) | |
399 | return -ENOMEM; | |
400 | ||
401 | pp = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL); | |
402 | if (!pp) { | |
403 | kfree(p); | |
404 | return -ENOMEM; | |
405 | } | |
406 | ||
407 | *replay_esn = p; | |
408 | *preplay_esn = pp; | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
661697f7 | 413 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 414 | { |
df71837d TJ |
415 | int len = 0; |
416 | ||
417 | if (xfrm_ctx) { | |
418 | len += sizeof(struct xfrm_user_sec_ctx); | |
419 | len += xfrm_ctx->ctx_len; | |
420 | } | |
421 | return len; | |
422 | } | |
423 | ||
1da177e4 LT |
424 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
425 | { | |
426 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
427 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
428 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
429 | x->props.mode = p->mode; | |
430 | x->props.replay_window = p->replay_window; | |
431 | x->props.reqid = p->reqid; | |
432 | x->props.family = p->family; | |
54489c14 | 433 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 434 | x->props.flags = p->flags; |
196b0036 | 435 | |
ccf9b3b8 | 436 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 437 | x->sel.family = p->family; |
1da177e4 LT |
438 | } |
439 | ||
d51d081d JHS |
440 | /* |
441 | * someday when pfkey also has support, we could have the code | |
442 | * somehow made shareable and move it to xfrm_state.c - JHS | |
443 | * | |
444 | */ | |
5424f32e | 445 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 446 | { |
5424f32e | 447 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 448 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e TG |
449 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
450 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
451 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 452 | |
d8647b79 SK |
453 | if (re) { |
454 | struct xfrm_replay_state_esn *replay_esn; | |
455 | replay_esn = nla_data(re); | |
456 | memcpy(x->replay_esn, replay_esn, | |
457 | xfrm_replay_state_esn_len(replay_esn)); | |
458 | memcpy(x->preplay_esn, replay_esn, | |
459 | xfrm_replay_state_esn_len(replay_esn)); | |
460 | } | |
461 | ||
d51d081d JHS |
462 | if (rp) { |
463 | struct xfrm_replay_state *replay; | |
5424f32e | 464 | replay = nla_data(rp); |
d51d081d JHS |
465 | memcpy(&x->replay, replay, sizeof(*replay)); |
466 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
467 | } | |
468 | ||
469 | if (lt) { | |
470 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 471 | ltime = nla_data(lt); |
d51d081d JHS |
472 | x->curlft.bytes = ltime->bytes; |
473 | x->curlft.packets = ltime->packets; | |
474 | x->curlft.add_time = ltime->add_time; | |
475 | x->curlft.use_time = ltime->use_time; | |
476 | } | |
477 | ||
cf5cb79f | 478 | if (et) |
5424f32e | 479 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 480 | |
cf5cb79f | 481 | if (rt) |
5424f32e | 482 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
483 | } |
484 | ||
fc34acd3 AD |
485 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
486 | struct xfrm_usersa_info *p, | |
5424f32e | 487 | struct nlattr **attrs, |
1da177e4 LT |
488 | int *errp) |
489 | { | |
fc34acd3 | 490 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
491 | int err = -ENOMEM; |
492 | ||
493 | if (!x) | |
494 | goto error_no_put; | |
495 | ||
496 | copy_from_user_state(x, p); | |
497 | ||
1a6509d9 HX |
498 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
499 | attrs[XFRMA_ALG_AEAD]))) | |
500 | goto error; | |
4447bb33 MW |
501 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
502 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 503 | goto error; |
4447bb33 MW |
504 | if (!x->props.aalgo) { |
505 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
506 | attrs[XFRMA_ALG_AUTH]))) | |
507 | goto error; | |
508 | } | |
1da177e4 LT |
509 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
510 | xfrm_ealg_get_byname, | |
35a7aa08 | 511 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
512 | goto error; |
513 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
514 | xfrm_calg_get_byname, | |
35a7aa08 | 515 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 516 | goto error; |
fd21150a TG |
517 | |
518 | if (attrs[XFRMA_ENCAP]) { | |
519 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
520 | sizeof(*x->encap), GFP_KERNEL); | |
521 | if (x->encap == NULL) | |
522 | goto error; | |
523 | } | |
524 | ||
35d2856b MW |
525 | if (attrs[XFRMA_TFCPAD]) |
526 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); | |
527 | ||
fd21150a TG |
528 | if (attrs[XFRMA_COADDR]) { |
529 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
530 | sizeof(*x->coaddr), GFP_KERNEL); | |
531 | if (x->coaddr == NULL) | |
532 | goto error; | |
533 | } | |
534 | ||
6f26b61e JHS |
535 | xfrm_mark_get(attrs, &x->mark); |
536 | ||
a454f0cc | 537 | err = __xfrm_init_state(x, false); |
1da177e4 LT |
538 | if (err) |
539 | goto error; | |
540 | ||
fd21150a TG |
541 | if (attrs[XFRMA_SEC_CTX] && |
542 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
543 | goto error; |
544 | ||
d8647b79 SK |
545 | if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, |
546 | attrs[XFRMA_REPLAY_ESN_VAL]))) | |
547 | goto error; | |
548 | ||
1da177e4 | 549 | x->km.seq = p->seq; |
b27aeadb | 550 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 551 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 552 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d | 553 | |
9fdc4883 SK |
554 | if ((err = xfrm_init_replay(x))) |
555 | goto error; | |
d51d081d | 556 | |
9fdc4883 | 557 | /* override default values from above */ |
5424f32e | 558 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
559 | |
560 | return x; | |
561 | ||
562 | error: | |
563 | x->km.state = XFRM_STATE_DEAD; | |
564 | xfrm_state_put(x); | |
565 | error_no_put: | |
566 | *errp = err; | |
567 | return NULL; | |
568 | } | |
569 | ||
22e70050 | 570 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 571 | struct nlattr **attrs) |
1da177e4 | 572 | { |
fc34acd3 | 573 | struct net *net = sock_net(skb->sk); |
7b67c857 | 574 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
575 | struct xfrm_state *x; |
576 | int err; | |
26b15dad | 577 | struct km_event c; |
c53fa1ed PM |
578 | uid_t loginuid = audit_get_loginuid(current); |
579 | u32 sessionid = audit_get_sessionid(current); | |
580 | u32 sid; | |
1da177e4 | 581 | |
35a7aa08 | 582 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
583 | if (err) |
584 | return err; | |
585 | ||
fc34acd3 | 586 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
587 | if (!x) |
588 | return err; | |
589 | ||
26b15dad | 590 | xfrm_state_hold(x); |
1da177e4 LT |
591 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
592 | err = xfrm_state_add(x); | |
593 | else | |
594 | err = xfrm_state_update(x); | |
595 | ||
c53fa1ed | 596 | security_task_getsecid(current, &sid); |
2532386f | 597 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 598 | |
1da177e4 LT |
599 | if (err < 0) { |
600 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 601 | __xfrm_state_put(x); |
7d6dfe1f | 602 | goto out; |
1da177e4 LT |
603 | } |
604 | ||
26b15dad JHS |
605 | c.seq = nlh->nlmsg_seq; |
606 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 607 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
608 | |
609 | km_state_notify(x, &c); | |
7d6dfe1f | 610 | out: |
26b15dad | 611 | xfrm_state_put(x); |
1da177e4 LT |
612 | return err; |
613 | } | |
614 | ||
fc34acd3 AD |
615 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
616 | struct xfrm_usersa_id *p, | |
5424f32e | 617 | struct nlattr **attrs, |
eb2971b6 MN |
618 | int *errp) |
619 | { | |
620 | struct xfrm_state *x = NULL; | |
6f26b61e | 621 | struct xfrm_mark m; |
eb2971b6 | 622 | int err; |
6f26b61e | 623 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
624 | |
625 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
626 | err = -ESRCH; | |
6f26b61e | 627 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
628 | } else { |
629 | xfrm_address_t *saddr = NULL; | |
630 | ||
35a7aa08 | 631 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
632 | if (!saddr) { |
633 | err = -EINVAL; | |
634 | goto out; | |
635 | } | |
636 | ||
9abbffee | 637 | err = -ESRCH; |
6f26b61e JHS |
638 | x = xfrm_state_lookup_byaddr(net, mark, |
639 | &p->daddr, saddr, | |
221df1ed | 640 | p->proto, p->family); |
eb2971b6 MN |
641 | } |
642 | ||
643 | out: | |
644 | if (!x && errp) | |
645 | *errp = err; | |
646 | return x; | |
647 | } | |
648 | ||
22e70050 | 649 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 650 | struct nlattr **attrs) |
1da177e4 | 651 | { |
fc34acd3 | 652 | struct net *net = sock_net(skb->sk); |
1da177e4 | 653 | struct xfrm_state *x; |
eb2971b6 | 654 | int err = -ESRCH; |
26b15dad | 655 | struct km_event c; |
7b67c857 | 656 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
c53fa1ed PM |
657 | uid_t loginuid = audit_get_loginuid(current); |
658 | u32 sessionid = audit_get_sessionid(current); | |
659 | u32 sid; | |
1da177e4 | 660 | |
fc34acd3 | 661 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 662 | if (x == NULL) |
eb2971b6 | 663 | return err; |
1da177e4 | 664 | |
6f68dc37 | 665 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
666 | goto out; |
667 | ||
1da177e4 | 668 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
669 | err = -EPERM; |
670 | goto out; | |
1da177e4 LT |
671 | } |
672 | ||
26b15dad | 673 | err = xfrm_state_delete(x); |
161a09e7 | 674 | |
c8c05a8e CZ |
675 | if (err < 0) |
676 | goto out; | |
26b15dad JHS |
677 | |
678 | c.seq = nlh->nlmsg_seq; | |
679 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 680 | c.event = nlh->nlmsg_type; |
26b15dad | 681 | km_state_notify(x, &c); |
1da177e4 | 682 | |
c8c05a8e | 683 | out: |
c53fa1ed | 684 | security_task_getsecid(current, &sid); |
2532386f | 685 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 686 | xfrm_state_put(x); |
26b15dad | 687 | return err; |
1da177e4 LT |
688 | } |
689 | ||
690 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
691 | { | |
692 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
693 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
694 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
695 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
696 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 697 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
698 | p->mode = x->props.mode; |
699 | p->replay_window = x->props.replay_window; | |
700 | p->reqid = x->props.reqid; | |
701 | p->family = x->props.family; | |
702 | p->flags = x->props.flags; | |
703 | p->seq = x->km.seq; | |
704 | } | |
705 | ||
706 | struct xfrm_dump_info { | |
707 | struct sk_buff *in_skb; | |
708 | struct sk_buff *out_skb; | |
709 | u32 nlmsg_seq; | |
710 | u16 nlmsg_flags; | |
1da177e4 LT |
711 | }; |
712 | ||
c0144bea TG |
713 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
714 | { | |
c0144bea TG |
715 | struct xfrm_user_sec_ctx *uctx; |
716 | struct nlattr *attr; | |
68325d3b | 717 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
718 | |
719 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
720 | if (attr == NULL) | |
721 | return -EMSGSIZE; | |
722 | ||
723 | uctx = nla_data(attr); | |
724 | uctx->exttype = XFRMA_SEC_CTX; | |
725 | uctx->len = ctx_size; | |
726 | uctx->ctx_doi = s->ctx_doi; | |
727 | uctx->ctx_alg = s->ctx_alg; | |
728 | uctx->ctx_len = s->ctx_len; | |
729 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
4447bb33 MW |
734 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
735 | { | |
736 | struct xfrm_algo *algo; | |
737 | struct nlattr *nla; | |
738 | ||
739 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
740 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
741 | if (!nla) | |
742 | return -EMSGSIZE; | |
743 | ||
744 | algo = nla_data(nla); | |
4c87308b | 745 | strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); |
4447bb33 MW |
746 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
747 | algo->alg_key_len = auth->alg_key_len; | |
748 | ||
749 | return 0; | |
750 | } | |
751 | ||
68325d3b HX |
752 | /* Don't change this without updating xfrm_sa_len! */ |
753 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
754 | struct xfrm_usersa_info *p, | |
755 | struct sk_buff *skb) | |
1da177e4 | 756 | { |
1d1e34dd | 757 | int ret = 0; |
d0fde795 | 758 | |
1d1e34dd | 759 | copy_to_user_state(x, p); |
68325d3b | 760 | |
1d1e34dd DM |
761 | if (x->coaddr) { |
762 | ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
763 | if (ret) | |
764 | goto out; | |
765 | } | |
766 | if (x->lastused) { | |
767 | ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused); | |
768 | if (ret) | |
769 | goto out; | |
770 | } | |
771 | if (x->aead) { | |
772 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
773 | if (ret) | |
774 | goto out; | |
775 | } | |
776 | if (x->aalg) { | |
777 | ret = copy_to_user_auth(x->aalg, skb); | |
778 | if (!ret) | |
779 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
780 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
781 | if (ret) | |
782 | goto out; | |
783 | } | |
784 | if (x->ealg) { | |
785 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); | |
786 | if (ret) | |
787 | goto out; | |
788 | } | |
789 | if (x->calg) { | |
790 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
791 | if (ret) | |
792 | goto out; | |
793 | } | |
794 | if (x->encap) { | |
795 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
796 | if (ret) | |
797 | goto out; | |
798 | } | |
799 | if (x->tfcpad) { | |
800 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); | |
801 | if (ret) | |
802 | goto out; | |
803 | } | |
804 | ret = xfrm_mark_put(skb, &x->mark); | |
805 | if (ret) | |
806 | goto out; | |
807 | if (x->replay_esn) { | |
808 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, | |
809 | xfrm_replay_state_esn_len(x->replay_esn), | |
810 | x->replay_esn); | |
811 | if (ret) | |
812 | goto out; | |
813 | } | |
814 | if (x->security) | |
815 | ret = copy_sec_ctx(x->security, skb); | |
816 | out: | |
817 | return ret; | |
68325d3b HX |
818 | } |
819 | ||
820 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
821 | { | |
822 | struct xfrm_dump_info *sp = ptr; | |
823 | struct sk_buff *in_skb = sp->in_skb; | |
824 | struct sk_buff *skb = sp->out_skb; | |
825 | struct xfrm_usersa_info *p; | |
826 | struct nlmsghdr *nlh; | |
827 | int err; | |
828 | ||
68325d3b HX |
829 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
830 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
831 | if (nlh == NULL) | |
832 | return -EMSGSIZE; | |
833 | ||
834 | p = nlmsg_data(nlh); | |
835 | ||
836 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
837 | if (err) { |
838 | nlmsg_cancel(skb, nlh); | |
839 | return err; | |
840 | } | |
9825069d | 841 | nlmsg_end(skb, nlh); |
1da177e4 | 842 | return 0; |
1da177e4 LT |
843 | } |
844 | ||
4c563f76 TT |
845 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
846 | { | |
847 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
848 | xfrm_state_walk_done(walk); | |
849 | return 0; | |
850 | } | |
851 | ||
1da177e4 LT |
852 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
853 | { | |
fc34acd3 | 854 | struct net *net = sock_net(skb->sk); |
4c563f76 | 855 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
856 | struct xfrm_dump_info info; |
857 | ||
4c563f76 TT |
858 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
859 | sizeof(cb->args) - sizeof(cb->args[0])); | |
860 | ||
1da177e4 LT |
861 | info.in_skb = cb->skb; |
862 | info.out_skb = skb; | |
863 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
864 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
865 | |
866 | if (!cb->args[0]) { | |
867 | cb->args[0] = 1; | |
868 | xfrm_state_walk_init(walk, 0); | |
869 | } | |
870 | ||
fc34acd3 | 871 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
872 | |
873 | return skb->len; | |
874 | } | |
875 | ||
876 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
877 | struct xfrm_state *x, u32 seq) | |
878 | { | |
879 | struct xfrm_dump_info info; | |
880 | struct sk_buff *skb; | |
864745d2 | 881 | int err; |
1da177e4 | 882 | |
7deb2264 | 883 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
884 | if (!skb) |
885 | return ERR_PTR(-ENOMEM); | |
886 | ||
1da177e4 LT |
887 | info.in_skb = in_skb; |
888 | info.out_skb = skb; | |
889 | info.nlmsg_seq = seq; | |
890 | info.nlmsg_flags = 0; | |
1da177e4 | 891 | |
864745d2 MK |
892 | err = dump_one_state(x, 0, &info); |
893 | if (err) { | |
1da177e4 | 894 | kfree_skb(skb); |
864745d2 | 895 | return ERR_PTR(err); |
1da177e4 LT |
896 | } |
897 | ||
898 | return skb; | |
899 | } | |
900 | ||
7deb2264 TG |
901 | static inline size_t xfrm_spdinfo_msgsize(void) |
902 | { | |
903 | return NLMSG_ALIGN(4) | |
904 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
905 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
906 | } | |
907 | ||
e071041b AD |
908 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
909 | u32 pid, u32 seq, u32 flags) | |
ecfd6b18 | 910 | { |
5a6d3416 JHS |
911 | struct xfrmk_spdinfo si; |
912 | struct xfrmu_spdinfo spc; | |
913 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 | 914 | struct nlmsghdr *nlh; |
1d1e34dd | 915 | int err; |
ecfd6b18 JHS |
916 | u32 *f; |
917 | ||
918 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
25985edc | 919 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
920 | return -EMSGSIZE; |
921 | ||
922 | f = nlmsg_data(nlh); | |
923 | *f = flags; | |
e071041b | 924 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
925 | spc.incnt = si.incnt; |
926 | spc.outcnt = si.outcnt; | |
927 | spc.fwdcnt = si.fwdcnt; | |
928 | spc.inscnt = si.inscnt; | |
929 | spc.outscnt = si.outscnt; | |
930 | spc.fwdscnt = si.fwdscnt; | |
931 | sph.spdhcnt = si.spdhcnt; | |
932 | sph.spdhmcnt = si.spdhmcnt; | |
933 | ||
1d1e34dd DM |
934 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
935 | if (!err) | |
936 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
937 | if (err) { | |
938 | nlmsg_cancel(skb, nlh); | |
939 | return err; | |
940 | } | |
ecfd6b18 JHS |
941 | |
942 | return nlmsg_end(skb, nlh); | |
ecfd6b18 JHS |
943 | } |
944 | ||
945 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 946 | struct nlattr **attrs) |
ecfd6b18 | 947 | { |
a6483b79 | 948 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 949 | struct sk_buff *r_skb; |
7b67c857 | 950 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
951 | u32 spid = NETLINK_CB(skb).pid; |
952 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 953 | |
7deb2264 | 954 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
955 | if (r_skb == NULL) |
956 | return -ENOMEM; | |
957 | ||
e071041b | 958 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
ecfd6b18 JHS |
959 | BUG(); |
960 | ||
a6483b79 | 961 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
962 | } |
963 | ||
7deb2264 TG |
964 | static inline size_t xfrm_sadinfo_msgsize(void) |
965 | { | |
966 | return NLMSG_ALIGN(4) | |
967 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
968 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
969 | } | |
970 | ||
e071041b AD |
971 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
972 | u32 pid, u32 seq, u32 flags) | |
28d8909b | 973 | { |
af11e316 JHS |
974 | struct xfrmk_sadinfo si; |
975 | struct xfrmu_sadhinfo sh; | |
28d8909b | 976 | struct nlmsghdr *nlh; |
1d1e34dd | 977 | int err; |
28d8909b JHS |
978 | u32 *f; |
979 | ||
980 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
25985edc | 981 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
982 | return -EMSGSIZE; |
983 | ||
984 | f = nlmsg_data(nlh); | |
985 | *f = flags; | |
e071041b | 986 | xfrm_sad_getinfo(net, &si); |
28d8909b | 987 | |
af11e316 JHS |
988 | sh.sadhmcnt = si.sadhmcnt; |
989 | sh.sadhcnt = si.sadhcnt; | |
990 | ||
1d1e34dd DM |
991 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
992 | if (!err) | |
993 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
994 | if (err) { | |
995 | nlmsg_cancel(skb, nlh); | |
996 | return err; | |
997 | } | |
28d8909b JHS |
998 | |
999 | return nlmsg_end(skb, nlh); | |
28d8909b JHS |
1000 | } |
1001 | ||
1002 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1003 | struct nlattr **attrs) |
28d8909b | 1004 | { |
a6483b79 | 1005 | struct net *net = sock_net(skb->sk); |
28d8909b | 1006 | struct sk_buff *r_skb; |
7b67c857 | 1007 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
1008 | u32 spid = NETLINK_CB(skb).pid; |
1009 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 1010 | |
7deb2264 | 1011 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1012 | if (r_skb == NULL) |
1013 | return -ENOMEM; | |
1014 | ||
e071041b | 1015 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
28d8909b JHS |
1016 | BUG(); |
1017 | ||
a6483b79 | 1018 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
1019 | } |
1020 | ||
22e70050 | 1021 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1022 | struct nlattr **attrs) |
1da177e4 | 1023 | { |
fc34acd3 | 1024 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1025 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1026 | struct xfrm_state *x; |
1027 | struct sk_buff *resp_skb; | |
eb2971b6 | 1028 | int err = -ESRCH; |
1da177e4 | 1029 | |
fc34acd3 | 1030 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1031 | if (x == NULL) |
1032 | goto out_noput; | |
1033 | ||
1034 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1035 | if (IS_ERR(resp_skb)) { | |
1036 | err = PTR_ERR(resp_skb); | |
1037 | } else { | |
a6483b79 | 1038 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1039 | } |
1040 | xfrm_state_put(x); | |
1041 | out_noput: | |
1042 | return err; | |
1043 | } | |
1044 | ||
1045 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
1046 | { | |
1047 | switch (p->info.id.proto) { | |
1048 | case IPPROTO_AH: | |
1049 | case IPPROTO_ESP: | |
1050 | break; | |
1051 | ||
1052 | case IPPROTO_COMP: | |
1053 | /* IPCOMP spi is 16-bits. */ | |
1054 | if (p->max >= 0x10000) | |
1055 | return -EINVAL; | |
1056 | break; | |
1057 | ||
1058 | default: | |
1059 | return -EINVAL; | |
3ff50b79 | 1060 | } |
1da177e4 LT |
1061 | |
1062 | if (p->min > p->max) | |
1063 | return -EINVAL; | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
22e70050 | 1068 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1069 | struct nlattr **attrs) |
1da177e4 | 1070 | { |
fc34acd3 | 1071 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1072 | struct xfrm_state *x; |
1073 | struct xfrm_userspi_info *p; | |
1074 | struct sk_buff *resp_skb; | |
1075 | xfrm_address_t *daddr; | |
1076 | int family; | |
1077 | int err; | |
6f26b61e JHS |
1078 | u32 mark; |
1079 | struct xfrm_mark m; | |
1da177e4 | 1080 | |
7b67c857 | 1081 | p = nlmsg_data(nlh); |
1da177e4 LT |
1082 | err = verify_userspi_info(p); |
1083 | if (err) | |
1084 | goto out_noput; | |
1085 | ||
1086 | family = p->info.family; | |
1087 | daddr = &p->info.id.daddr; | |
1088 | ||
1089 | x = NULL; | |
6f26b61e JHS |
1090 | |
1091 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1092 | if (p->info.seq) { |
6f26b61e | 1093 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
1da177e4 LT |
1094 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
1095 | xfrm_state_put(x); | |
1096 | x = NULL; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | if (!x) | |
6f26b61e | 1101 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1102 | p->info.id.proto, daddr, |
1103 | &p->info.saddr, 1, | |
1104 | family); | |
1105 | err = -ENOENT; | |
1106 | if (x == NULL) | |
1107 | goto out_noput; | |
1108 | ||
658b219e HX |
1109 | err = xfrm_alloc_spi(x, p->min, p->max); |
1110 | if (err) | |
1111 | goto out; | |
1da177e4 | 1112 | |
658b219e | 1113 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1114 | if (IS_ERR(resp_skb)) { |
1115 | err = PTR_ERR(resp_skb); | |
1116 | goto out; | |
1117 | } | |
1118 | ||
a6483b79 | 1119 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1120 | |
1121 | out: | |
1122 | xfrm_state_put(x); | |
1123 | out_noput: | |
1124 | return err; | |
1125 | } | |
1126 | ||
b798a9ed | 1127 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1128 | { |
1129 | switch (dir) { | |
1130 | case XFRM_POLICY_IN: | |
1131 | case XFRM_POLICY_OUT: | |
1132 | case XFRM_POLICY_FWD: | |
1133 | break; | |
1134 | ||
1135 | default: | |
1136 | return -EINVAL; | |
3ff50b79 | 1137 | } |
1da177e4 LT |
1138 | |
1139 | return 0; | |
1140 | } | |
1141 | ||
b798a9ed | 1142 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1143 | { |
1144 | switch (type) { | |
1145 | case XFRM_POLICY_TYPE_MAIN: | |
1146 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1147 | case XFRM_POLICY_TYPE_SUB: | |
1148 | #endif | |
1149 | break; | |
1150 | ||
1151 | default: | |
1152 | return -EINVAL; | |
3ff50b79 | 1153 | } |
f7b6983f MN |
1154 | |
1155 | return 0; | |
1156 | } | |
1157 | ||
1da177e4 LT |
1158 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1159 | { | |
1160 | switch (p->share) { | |
1161 | case XFRM_SHARE_ANY: | |
1162 | case XFRM_SHARE_SESSION: | |
1163 | case XFRM_SHARE_USER: | |
1164 | case XFRM_SHARE_UNIQUE: | |
1165 | break; | |
1166 | ||
1167 | default: | |
1168 | return -EINVAL; | |
3ff50b79 | 1169 | } |
1da177e4 LT |
1170 | |
1171 | switch (p->action) { | |
1172 | case XFRM_POLICY_ALLOW: | |
1173 | case XFRM_POLICY_BLOCK: | |
1174 | break; | |
1175 | ||
1176 | default: | |
1177 | return -EINVAL; | |
3ff50b79 | 1178 | } |
1da177e4 LT |
1179 | |
1180 | switch (p->sel.family) { | |
1181 | case AF_INET: | |
1182 | break; | |
1183 | ||
1184 | case AF_INET6: | |
dfd56b8b | 1185 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1186 | break; |
1187 | #else | |
1188 | return -EAFNOSUPPORT; | |
1189 | #endif | |
1190 | ||
1191 | default: | |
1192 | return -EINVAL; | |
3ff50b79 | 1193 | } |
1da177e4 LT |
1194 | |
1195 | return verify_policy_dir(p->dir); | |
1196 | } | |
1197 | ||
5424f32e | 1198 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1199 | { |
5424f32e | 1200 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1201 | struct xfrm_user_sec_ctx *uctx; |
1202 | ||
1203 | if (!rt) | |
1204 | return 0; | |
1205 | ||
5424f32e | 1206 | uctx = nla_data(rt); |
03e1ad7b | 1207 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1208 | } |
1209 | ||
1da177e4 LT |
1210 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1211 | int nr) | |
1212 | { | |
1213 | int i; | |
1214 | ||
1215 | xp->xfrm_nr = nr; | |
1216 | for (i = 0; i < nr; i++, ut++) { | |
1217 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1218 | ||
1219 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1220 | memcpy(&t->saddr, &ut->saddr, | |
1221 | sizeof(xfrm_address_t)); | |
1222 | t->reqid = ut->reqid; | |
1223 | t->mode = ut->mode; | |
1224 | t->share = ut->share; | |
1225 | t->optional = ut->optional; | |
1226 | t->aalgos = ut->aalgos; | |
1227 | t->ealgos = ut->ealgos; | |
1228 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1229 | /* If all masks are ~0, then we allow all algorithms. */ |
1230 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1231 | t->encap_family = ut->family; |
1da177e4 LT |
1232 | } |
1233 | } | |
1234 | ||
b4ad86bf DM |
1235 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1236 | { | |
1237 | int i; | |
1238 | ||
1239 | if (nr > XFRM_MAX_DEPTH) | |
1240 | return -EINVAL; | |
1241 | ||
1242 | for (i = 0; i < nr; i++) { | |
1243 | /* We never validated the ut->family value, so many | |
1244 | * applications simply leave it at zero. The check was | |
1245 | * never made and ut->family was ignored because all | |
1246 | * templates could be assumed to have the same family as | |
1247 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1248 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1249 | */ | |
1250 | if (!ut[i].family) | |
1251 | ut[i].family = family; | |
1252 | ||
1253 | switch (ut[i].family) { | |
1254 | case AF_INET: | |
1255 | break; | |
dfd56b8b | 1256 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1257 | case AF_INET6: |
1258 | break; | |
1259 | #endif | |
1260 | default: | |
1261 | return -EINVAL; | |
3ff50b79 | 1262 | } |
b4ad86bf DM |
1263 | } |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
5424f32e | 1268 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1269 | { |
5424f32e | 1270 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1271 | |
1272 | if (!rt) { | |
1273 | pol->xfrm_nr = 0; | |
1274 | } else { | |
5424f32e TG |
1275 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1276 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1277 | int err; |
1da177e4 | 1278 | |
b4ad86bf DM |
1279 | err = validate_tmpl(nr, utmpl, pol->family); |
1280 | if (err) | |
1281 | return err; | |
1da177e4 | 1282 | |
5424f32e | 1283 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1284 | } |
1285 | return 0; | |
1286 | } | |
1287 | ||
5424f32e | 1288 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1289 | { |
5424f32e | 1290 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1291 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1292 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1293 | int err; |
1294 | ||
1295 | if (rt) { | |
5424f32e | 1296 | upt = nla_data(rt); |
f7b6983f MN |
1297 | type = upt->type; |
1298 | } | |
1299 | ||
1300 | err = verify_policy_type(type); | |
1301 | if (err) | |
1302 | return err; | |
1303 | ||
1304 | *tp = type; | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1da177e4 LT |
1308 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1309 | { | |
1310 | xp->priority = p->priority; | |
1311 | xp->index = p->index; | |
1312 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1313 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1314 | xp->action = p->action; | |
1315 | xp->flags = p->flags; | |
1316 | xp->family = p->sel.family; | |
1317 | /* XXX xp->share = p->share; */ | |
1318 | } | |
1319 | ||
1320 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1321 | { | |
1322 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1323 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1324 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1325 | p->priority = xp->priority; | |
1326 | p->index = xp->index; | |
1327 | p->sel.family = xp->family; | |
1328 | p->dir = dir; | |
1329 | p->action = xp->action; | |
1330 | p->flags = xp->flags; | |
1331 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1332 | } | |
1333 | ||
fc34acd3 | 1334 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1335 | { |
fc34acd3 | 1336 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1337 | int err; |
1338 | ||
1339 | if (!xp) { | |
1340 | *errp = -ENOMEM; | |
1341 | return NULL; | |
1342 | } | |
1343 | ||
1344 | copy_from_user_policy(xp, p); | |
df71837d | 1345 | |
35a7aa08 | 1346 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1347 | if (err) |
1348 | goto error; | |
1349 | ||
35a7aa08 TG |
1350 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1351 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1352 | if (err) |
1353 | goto error; | |
1da177e4 | 1354 | |
295fae56 JHS |
1355 | xfrm_mark_get(attrs, &xp->mark); |
1356 | ||
1da177e4 | 1357 | return xp; |
f7b6983f MN |
1358 | error: |
1359 | *errp = err; | |
12a169e7 | 1360 | xp->walk.dead = 1; |
64c31b3f | 1361 | xfrm_policy_destroy(xp); |
f7b6983f | 1362 | return NULL; |
1da177e4 LT |
1363 | } |
1364 | ||
22e70050 | 1365 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1366 | struct nlattr **attrs) |
1da177e4 | 1367 | { |
fc34acd3 | 1368 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1369 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1370 | struct xfrm_policy *xp; |
26b15dad | 1371 | struct km_event c; |
1da177e4 LT |
1372 | int err; |
1373 | int excl; | |
c53fa1ed PM |
1374 | uid_t loginuid = audit_get_loginuid(current); |
1375 | u32 sessionid = audit_get_sessionid(current); | |
1376 | u32 sid; | |
1da177e4 LT |
1377 | |
1378 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1379 | if (err) |
1380 | return err; | |
35a7aa08 | 1381 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1382 | if (err) |
1383 | return err; | |
1384 | ||
fc34acd3 | 1385 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1386 | if (!xp) |
1387 | return err; | |
1388 | ||
25985edc | 1389 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1390 | * Aha! this is anti-netlink really i.e more pfkey derived |
1391 | * in netlink excl is a flag and you wouldnt need | |
1392 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1393 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1394 | err = xfrm_policy_insert(p->dir, xp, excl); | |
c53fa1ed | 1395 | security_task_getsecid(current, &sid); |
2532386f | 1396 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1397 | |
1da177e4 | 1398 | if (err) { |
03e1ad7b | 1399 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1400 | kfree(xp); |
1401 | return err; | |
1402 | } | |
1403 | ||
f60f6b8f | 1404 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1405 | c.seq = nlh->nlmsg_seq; |
1406 | c.pid = nlh->nlmsg_pid; | |
1407 | km_policy_notify(xp, p->dir, &c); | |
1408 | ||
1da177e4 LT |
1409 | xfrm_pol_put(xp); |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1415 | { | |
1416 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1417 | int i; | |
1418 | ||
1419 | if (xp->xfrm_nr == 0) | |
1420 | return 0; | |
1421 | ||
1422 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1423 | struct xfrm_user_tmpl *up = &vec[i]; | |
1424 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1425 | ||
1426 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1427 | up->family = kp->encap_family; |
1da177e4 LT |
1428 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1429 | up->reqid = kp->reqid; | |
1430 | up->mode = kp->mode; | |
1431 | up->share = kp->share; | |
1432 | up->optional = kp->optional; | |
1433 | up->aalgos = kp->aalgos; | |
1434 | up->ealgos = kp->ealgos; | |
1435 | up->calgos = kp->calgos; | |
1436 | } | |
df71837d | 1437 | |
c0144bea TG |
1438 | return nla_put(skb, XFRMA_TMPL, |
1439 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1440 | } |
1441 | ||
1442 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1443 | { | |
1444 | if (x->security) { | |
1445 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1446 | } |
1447 | return 0; | |
0d681623 | 1448 | } |
df71837d | 1449 | |
0d681623 SH |
1450 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1451 | { | |
1d1e34dd | 1452 | if (xp->security) |
0d681623 | 1453 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1454 | return 0; |
df71837d | 1455 | } |
cfbfd45a TG |
1456 | static inline size_t userpolicy_type_attrsize(void) |
1457 | { | |
1458 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1459 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1460 | #else | |
1461 | return 0; | |
1462 | #endif | |
1463 | } | |
df71837d | 1464 | |
f7b6983f | 1465 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1466 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1467 | { |
c0144bea TG |
1468 | struct xfrm_userpolicy_type upt = { |
1469 | .type = type, | |
1470 | }; | |
f7b6983f | 1471 | |
c0144bea | 1472 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1473 | } |
1474 | ||
1475 | #else | |
b798a9ed | 1476 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1477 | { |
1478 | return 0; | |
1479 | } | |
1480 | #endif | |
1481 | ||
1da177e4 LT |
1482 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1483 | { | |
1484 | struct xfrm_dump_info *sp = ptr; | |
1485 | struct xfrm_userpolicy_info *p; | |
1486 | struct sk_buff *in_skb = sp->in_skb; | |
1487 | struct sk_buff *skb = sp->out_skb; | |
1488 | struct nlmsghdr *nlh; | |
1d1e34dd | 1489 | int err; |
1da177e4 | 1490 | |
79b8b7f4 TG |
1491 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1492 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1493 | if (nlh == NULL) | |
1494 | return -EMSGSIZE; | |
1da177e4 | 1495 | |
7b67c857 | 1496 | p = nlmsg_data(nlh); |
1da177e4 | 1497 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1498 | err = copy_to_user_tmpl(xp, skb); |
1499 | if (!err) | |
1500 | err = copy_to_user_sec_ctx(xp, skb); | |
1501 | if (!err) | |
1502 | err = copy_to_user_policy_type(xp->type, skb); | |
1503 | if (!err) | |
1504 | err = xfrm_mark_put(skb, &xp->mark); | |
1505 | if (err) { | |
1506 | nlmsg_cancel(skb, nlh); | |
1507 | return err; | |
1508 | } | |
9825069d | 1509 | nlmsg_end(skb, nlh); |
1da177e4 | 1510 | return 0; |
1da177e4 LT |
1511 | } |
1512 | ||
4c563f76 TT |
1513 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1514 | { | |
1515 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1516 | ||
1517 | xfrm_policy_walk_done(walk); | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1da177e4 LT |
1521 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1522 | { | |
fc34acd3 | 1523 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1524 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1525 | struct xfrm_dump_info info; |
1526 | ||
4c563f76 TT |
1527 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1528 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1529 | ||
1da177e4 LT |
1530 | info.in_skb = cb->skb; |
1531 | info.out_skb = skb; | |
1532 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1533 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1534 | |
1535 | if (!cb->args[0]) { | |
1536 | cb->args[0] = 1; | |
1537 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1538 | } | |
1539 | ||
fc34acd3 | 1540 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1541 | |
1542 | return skb->len; | |
1543 | } | |
1544 | ||
1545 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1546 | struct xfrm_policy *xp, | |
1547 | int dir, u32 seq) | |
1548 | { | |
1549 | struct xfrm_dump_info info; | |
1550 | struct sk_buff *skb; | |
c2546372 | 1551 | int err; |
1da177e4 | 1552 | |
7deb2264 | 1553 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1554 | if (!skb) |
1555 | return ERR_PTR(-ENOMEM); | |
1556 | ||
1da177e4 LT |
1557 | info.in_skb = in_skb; |
1558 | info.out_skb = skb; | |
1559 | info.nlmsg_seq = seq; | |
1560 | info.nlmsg_flags = 0; | |
1da177e4 | 1561 | |
c2546372 MK |
1562 | err = dump_one_policy(xp, dir, 0, &info); |
1563 | if (err) { | |
1da177e4 | 1564 | kfree_skb(skb); |
c2546372 | 1565 | return ERR_PTR(err); |
1da177e4 LT |
1566 | } |
1567 | ||
1568 | return skb; | |
1569 | } | |
1570 | ||
22e70050 | 1571 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1572 | struct nlattr **attrs) |
1da177e4 | 1573 | { |
fc34acd3 | 1574 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1575 | struct xfrm_policy *xp; |
1576 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1577 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1578 | int err; |
26b15dad | 1579 | struct km_event c; |
1da177e4 | 1580 | int delete; |
295fae56 JHS |
1581 | struct xfrm_mark m; |
1582 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1583 | |
7b67c857 | 1584 | p = nlmsg_data(nlh); |
1da177e4 LT |
1585 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1586 | ||
35a7aa08 | 1587 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1588 | if (err) |
1589 | return err; | |
1590 | ||
1da177e4 LT |
1591 | err = verify_policy_dir(p->dir); |
1592 | if (err) | |
1593 | return err; | |
1594 | ||
1595 | if (p->index) | |
295fae56 | 1596 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1597 | else { |
5424f32e | 1598 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1599 | struct xfrm_sec_ctx *ctx; |
df71837d | 1600 | |
35a7aa08 | 1601 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1602 | if (err) |
1603 | return err; | |
1604 | ||
2c8dd116 | 1605 | ctx = NULL; |
df71837d | 1606 | if (rt) { |
5424f32e | 1607 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1608 | |
03e1ad7b PM |
1609 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1610 | if (err) | |
df71837d | 1611 | return err; |
2c8dd116 | 1612 | } |
295fae56 | 1613 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1614 | ctx, delete, &err); |
03e1ad7b | 1615 | security_xfrm_policy_free(ctx); |
df71837d | 1616 | } |
1da177e4 LT |
1617 | if (xp == NULL) |
1618 | return -ENOENT; | |
1619 | ||
1620 | if (!delete) { | |
1621 | struct sk_buff *resp_skb; | |
1622 | ||
1623 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1624 | if (IS_ERR(resp_skb)) { | |
1625 | err = PTR_ERR(resp_skb); | |
1626 | } else { | |
a6483b79 | 1627 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1628 | NETLINK_CB(skb).pid); |
1da177e4 | 1629 | } |
26b15dad | 1630 | } else { |
c53fa1ed PM |
1631 | uid_t loginuid = audit_get_loginuid(current); |
1632 | u32 sessionid = audit_get_sessionid(current); | |
1633 | u32 sid; | |
2532386f | 1634 | |
c53fa1ed | 1635 | security_task_getsecid(current, &sid); |
2532386f EP |
1636 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, |
1637 | sid); | |
13fcfbb0 DM |
1638 | |
1639 | if (err != 0) | |
c8c05a8e | 1640 | goto out; |
13fcfbb0 | 1641 | |
e7443892 | 1642 | c.data.byid = p->index; |
f60f6b8f | 1643 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1644 | c.seq = nlh->nlmsg_seq; |
1645 | c.pid = nlh->nlmsg_pid; | |
1646 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1647 | } |
1648 | ||
c8c05a8e | 1649 | out: |
ef41aaa0 | 1650 | xfrm_pol_put(xp); |
1da177e4 LT |
1651 | return err; |
1652 | } | |
1653 | ||
22e70050 | 1654 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1655 | struct nlattr **attrs) |
1da177e4 | 1656 | { |
fc34acd3 | 1657 | struct net *net = sock_net(skb->sk); |
26b15dad | 1658 | struct km_event c; |
7b67c857 | 1659 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1660 | struct xfrm_audit audit_info; |
4aa2e62c | 1661 | int err; |
1da177e4 | 1662 | |
c53fa1ed PM |
1663 | audit_info.loginuid = audit_get_loginuid(current); |
1664 | audit_info.sessionid = audit_get_sessionid(current); | |
1665 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1666 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1667 | if (err) { |
1668 | if (err == -ESRCH) /* empty table */ | |
1669 | return 0; | |
069c474e | 1670 | return err; |
9e64cc95 | 1671 | } |
bf08867f | 1672 | c.data.proto = p->proto; |
f60f6b8f | 1673 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1674 | c.seq = nlh->nlmsg_seq; |
1675 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1676 | c.net = net; |
26b15dad JHS |
1677 | km_state_notify(NULL, &c); |
1678 | ||
1da177e4 LT |
1679 | return 0; |
1680 | } | |
1681 | ||
d8647b79 | 1682 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1683 | { |
d8647b79 SK |
1684 | size_t replay_size = x->replay_esn ? |
1685 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1686 | sizeof(struct xfrm_replay_state); | |
1687 | ||
7deb2264 | 1688 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1689 | + nla_total_size(replay_size) |
7deb2264 | 1690 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1691 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1692 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1693 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1694 | } | |
d51d081d | 1695 | |
214e005b | 1696 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1697 | { |
1698 | struct xfrm_aevent_id *id; | |
1699 | struct nlmsghdr *nlh; | |
1d1e34dd | 1700 | int err; |
d51d081d | 1701 | |
79b8b7f4 TG |
1702 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1703 | if (nlh == NULL) | |
1704 | return -EMSGSIZE; | |
d51d081d | 1705 | |
7b67c857 | 1706 | id = nlmsg_data(nlh); |
2b5f6dcc | 1707 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1708 | id->sa_id.spi = x->id.spi; |
1709 | id->sa_id.family = x->props.family; | |
1710 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1711 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1712 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1713 | id->flags = c->data.aevent; |
1714 | ||
d0fde795 | 1715 | if (x->replay_esn) { |
1d1e34dd DM |
1716 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1717 | xfrm_replay_state_esn_len(x->replay_esn), | |
1718 | x->replay_esn); | |
d0fde795 | 1719 | } else { |
1d1e34dd DM |
1720 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1721 | &x->replay); | |
d0fde795 | 1722 | } |
1d1e34dd DM |
1723 | if (err) |
1724 | goto out_cancel; | |
1725 | err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
1726 | if (err) | |
1727 | goto out_cancel; | |
d51d081d | 1728 | |
1d1e34dd DM |
1729 | if (id->flags & XFRM_AE_RTHR) { |
1730 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1731 | if (err) | |
1732 | goto out_cancel; | |
1733 | } | |
1734 | if (id->flags & XFRM_AE_ETHR) { | |
1735 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1736 | x->replay_maxage * 10 / HZ); | |
1737 | if (err) | |
1738 | goto out_cancel; | |
1739 | } | |
1740 | err = xfrm_mark_put(skb, &x->mark); | |
1741 | if (err) | |
1742 | goto out_cancel; | |
6f26b61e | 1743 | |
9825069d | 1744 | return nlmsg_end(skb, nlh); |
d51d081d | 1745 | |
1d1e34dd | 1746 | out_cancel: |
9825069d | 1747 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1748 | return err; |
d51d081d JHS |
1749 | } |
1750 | ||
22e70050 | 1751 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1752 | struct nlattr **attrs) |
d51d081d | 1753 | { |
fc34acd3 | 1754 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1755 | struct xfrm_state *x; |
1756 | struct sk_buff *r_skb; | |
1757 | int err; | |
1758 | struct km_event c; | |
6f26b61e JHS |
1759 | u32 mark; |
1760 | struct xfrm_mark m; | |
7b67c857 | 1761 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1762 | struct xfrm_usersa_id *id = &p->sa_id; |
1763 | ||
6f26b61e JHS |
1764 | mark = xfrm_mark_get(attrs, &m); |
1765 | ||
1766 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1767 | if (x == NULL) |
d51d081d | 1768 | return -ESRCH; |
d8647b79 SK |
1769 | |
1770 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1771 | if (r_skb == NULL) { | |
1772 | xfrm_state_put(x); | |
1773 | return -ENOMEM; | |
d51d081d JHS |
1774 | } |
1775 | ||
1776 | /* | |
1777 | * XXX: is this lock really needed - none of the other | |
1778 | * gets lock (the concern is things getting updated | |
1779 | * while we are still reading) - jhs | |
1780 | */ | |
1781 | spin_lock_bh(&x->lock); | |
1782 | c.data.aevent = p->flags; | |
1783 | c.seq = nlh->nlmsg_seq; | |
1784 | c.pid = nlh->nlmsg_pid; | |
1785 | ||
1786 | if (build_aevent(r_skb, x, &c) < 0) | |
1787 | BUG(); | |
a6483b79 | 1788 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1789 | spin_unlock_bh(&x->lock); |
1790 | xfrm_state_put(x); | |
1791 | return err; | |
1792 | } | |
1793 | ||
22e70050 | 1794 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1795 | struct nlattr **attrs) |
d51d081d | 1796 | { |
fc34acd3 | 1797 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1798 | struct xfrm_state *x; |
1799 | struct km_event c; | |
1800 | int err = - EINVAL; | |
6f26b61e JHS |
1801 | u32 mark = 0; |
1802 | struct xfrm_mark m; | |
7b67c857 | 1803 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1804 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1805 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1806 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1807 | |
d8647b79 | 1808 | if (!lt && !rp && !re) |
d51d081d JHS |
1809 | return err; |
1810 | ||
1811 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1812 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1813 | return err; | |
1814 | ||
6f26b61e JHS |
1815 | mark = xfrm_mark_get(attrs, &m); |
1816 | ||
1817 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1818 | if (x == NULL) |
1819 | return -ESRCH; | |
1820 | ||
1821 | if (x->km.state != XFRM_STATE_VALID) | |
1822 | goto out; | |
1823 | ||
e2b19125 SK |
1824 | err = xfrm_replay_verify_len(x->replay_esn, rp); |
1825 | if (err) | |
1826 | goto out; | |
1827 | ||
d51d081d | 1828 | spin_lock_bh(&x->lock); |
35a7aa08 | 1829 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1830 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1831 | |
1832 | c.event = nlh->nlmsg_type; | |
1833 | c.seq = nlh->nlmsg_seq; | |
1834 | c.pid = nlh->nlmsg_pid; | |
1835 | c.data.aevent = XFRM_AE_CU; | |
1836 | km_state_notify(x, &c); | |
1837 | err = 0; | |
1838 | out: | |
1839 | xfrm_state_put(x); | |
1840 | return err; | |
1841 | } | |
1842 | ||
22e70050 | 1843 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1844 | struct nlattr **attrs) |
1da177e4 | 1845 | { |
fc34acd3 | 1846 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1847 | struct km_event c; |
b798a9ed | 1848 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1849 | int err; |
161a09e7 | 1850 | struct xfrm_audit audit_info; |
f7b6983f | 1851 | |
35a7aa08 | 1852 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1853 | if (err) |
1854 | return err; | |
26b15dad | 1855 | |
c53fa1ed PM |
1856 | audit_info.loginuid = audit_get_loginuid(current); |
1857 | audit_info.sessionid = audit_get_sessionid(current); | |
1858 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1859 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1860 | if (err) { |
1861 | if (err == -ESRCH) /* empty table */ | |
1862 | return 0; | |
069c474e | 1863 | return err; |
2f1eb65f JHS |
1864 | } |
1865 | ||
f7b6983f | 1866 | c.data.type = type; |
f60f6b8f | 1867 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1868 | c.seq = nlh->nlmsg_seq; |
1869 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1870 | c.net = net; |
26b15dad | 1871 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1872 | return 0; |
1873 | } | |
1874 | ||
22e70050 | 1875 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1876 | struct nlattr **attrs) |
6c5c8ca7 | 1877 | { |
fc34acd3 | 1878 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1879 | struct xfrm_policy *xp; |
7b67c857 | 1880 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1881 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1882 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1883 | int err = -ENOENT; |
295fae56 JHS |
1884 | struct xfrm_mark m; |
1885 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1886 | |
35a7aa08 | 1887 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1888 | if (err) |
1889 | return err; | |
1890 | ||
c8bf4d04 TT |
1891 | err = verify_policy_dir(p->dir); |
1892 | if (err) | |
1893 | return err; | |
1894 | ||
6c5c8ca7 | 1895 | if (p->index) |
295fae56 | 1896 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1897 | else { |
5424f32e | 1898 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1899 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1900 | |
35a7aa08 | 1901 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1902 | if (err) |
1903 | return err; | |
1904 | ||
2c8dd116 | 1905 | ctx = NULL; |
6c5c8ca7 | 1906 | if (rt) { |
5424f32e | 1907 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1908 | |
03e1ad7b PM |
1909 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1910 | if (err) | |
6c5c8ca7 | 1911 | return err; |
2c8dd116 | 1912 | } |
295fae56 | 1913 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1914 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1915 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1916 | } |
6c5c8ca7 | 1917 | if (xp == NULL) |
ef41aaa0 | 1918 | return -ENOENT; |
03e1ad7b | 1919 | |
ea2dea9d | 1920 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1921 | goto out; |
6c5c8ca7 | 1922 | |
6c5c8ca7 JHS |
1923 | err = 0; |
1924 | if (up->hard) { | |
c53fa1ed PM |
1925 | uid_t loginuid = audit_get_loginuid(current); |
1926 | u32 sessionid = audit_get_sessionid(current); | |
1927 | u32 sid; | |
1928 | ||
1929 | security_task_getsecid(current, &sid); | |
6c5c8ca7 | 1930 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1931 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1932 | |
6c5c8ca7 JHS |
1933 | } else { |
1934 | // reset the timers here? | |
62db5cfd | 1935 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 JHS |
1936 | } |
1937 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1938 | ||
1939 | out: | |
1940 | xfrm_pol_put(xp); | |
1941 | return err; | |
1942 | } | |
1943 | ||
22e70050 | 1944 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1945 | struct nlattr **attrs) |
53bc6b4d | 1946 | { |
fc34acd3 | 1947 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1948 | struct xfrm_state *x; |
1949 | int err; | |
7b67c857 | 1950 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1951 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 1952 | struct xfrm_mark m; |
928497f0 | 1953 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 1954 | |
6f26b61e | 1955 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1956 | |
3a765aa5 | 1957 | err = -ENOENT; |
53bc6b4d JHS |
1958 | if (x == NULL) |
1959 | return err; | |
1960 | ||
53bc6b4d | 1961 | spin_lock_bh(&x->lock); |
3a765aa5 | 1962 | err = -EINVAL; |
53bc6b4d JHS |
1963 | if (x->km.state != XFRM_STATE_VALID) |
1964 | goto out; | |
1965 | km_state_expired(x, ue->hard, current->pid); | |
1966 | ||
161a09e7 | 1967 | if (ue->hard) { |
c53fa1ed PM |
1968 | uid_t loginuid = audit_get_loginuid(current); |
1969 | u32 sessionid = audit_get_sessionid(current); | |
1970 | u32 sid; | |
1971 | ||
1972 | security_task_getsecid(current, &sid); | |
53bc6b4d | 1973 | __xfrm_state_delete(x); |
2532386f | 1974 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1975 | } |
3a765aa5 | 1976 | err = 0; |
53bc6b4d JHS |
1977 | out: |
1978 | spin_unlock_bh(&x->lock); | |
1979 | xfrm_state_put(x); | |
1980 | return err; | |
1981 | } | |
1982 | ||
22e70050 | 1983 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1984 | struct nlattr **attrs) |
980ebd25 | 1985 | { |
fc34acd3 | 1986 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1987 | struct xfrm_policy *xp; |
1988 | struct xfrm_user_tmpl *ut; | |
1989 | int i; | |
5424f32e | 1990 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 1991 | struct xfrm_mark mark; |
980ebd25 | 1992 | |
7b67c857 | 1993 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1994 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1995 | int err = -ENOMEM; |
1996 | ||
1997 | if (!x) | |
d8eb9307 | 1998 | goto nomem; |
980ebd25 | 1999 | |
6f26b61e JHS |
2000 | xfrm_mark_get(attrs, &mark); |
2001 | ||
980ebd25 | 2002 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2003 | if (err) |
2004 | goto bad_policy; | |
980ebd25 JHS |
2005 | |
2006 | /* build an XP */ | |
fc34acd3 | 2007 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2008 | if (!xp) |
2009 | goto free_state; | |
980ebd25 JHS |
2010 | |
2011 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2012 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2013 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2014 | xp->mark.m = x->mark.m = mark.m; |
2015 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2016 | ut = nla_data(rt); |
980ebd25 JHS |
2017 | /* extract the templates and for each call km_key */ |
2018 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2019 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2020 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2021 | x->props.mode = t->mode; | |
2022 | x->props.reqid = t->reqid; | |
2023 | x->props.family = ut->family; | |
2024 | t->aalgos = ua->aalgos; | |
2025 | t->ealgos = ua->ealgos; | |
2026 | t->calgos = ua->calgos; | |
2027 | err = km_query(x, t, xp); | |
2028 | ||
2029 | } | |
2030 | ||
2031 | kfree(x); | |
2032 | kfree(xp); | |
2033 | ||
2034 | return 0; | |
d8eb9307 IJ |
2035 | |
2036 | bad_policy: | |
62db5cfd | 2037 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2038 | free_state: |
2039 | kfree(x); | |
2040 | nomem: | |
2041 | return err; | |
980ebd25 JHS |
2042 | } |
2043 | ||
5c79de6e | 2044 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2045 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2046 | struct xfrm_kmaddress *k, |
5424f32e | 2047 | struct nlattr **attrs, int *num) |
5c79de6e | 2048 | { |
5424f32e | 2049 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2050 | struct xfrm_user_migrate *um; |
2051 | int i, num_migrate; | |
2052 | ||
13c1d189 AE |
2053 | if (k != NULL) { |
2054 | struct xfrm_user_kmaddress *uk; | |
2055 | ||
2056 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2057 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2058 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2059 | k->family = uk->family; | |
2060 | k->reserved = uk->reserved; | |
2061 | } | |
2062 | ||
5424f32e TG |
2063 | um = nla_data(rt); |
2064 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2065 | |
2066 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2067 | return -EINVAL; | |
2068 | ||
2069 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2070 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2071 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2072 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2073 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2074 | ||
2075 | ma->proto = um->proto; | |
2076 | ma->mode = um->mode; | |
2077 | ma->reqid = um->reqid; | |
2078 | ||
2079 | ma->old_family = um->old_family; | |
2080 | ma->new_family = um->new_family; | |
2081 | } | |
2082 | ||
2083 | *num = i; | |
2084 | return 0; | |
2085 | } | |
2086 | ||
2087 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2088 | struct nlattr **attrs) |
5c79de6e | 2089 | { |
7b67c857 | 2090 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2091 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2092 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2093 | u8 type; |
2094 | int err; | |
2095 | int n = 0; | |
2096 | ||
35a7aa08 | 2097 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2098 | return -EINVAL; |
5c79de6e | 2099 | |
13c1d189 AE |
2100 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2101 | ||
5424f32e | 2102 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2103 | if (err) |
2104 | return err; | |
2105 | ||
13c1d189 | 2106 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2107 | if (err) |
2108 | return err; | |
2109 | ||
2110 | if (!n) | |
2111 | return 0; | |
2112 | ||
13c1d189 | 2113 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
2114 | |
2115 | return 0; | |
2116 | } | |
2117 | #else | |
2118 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2119 | struct nlattr **attrs) |
5c79de6e SS |
2120 | { |
2121 | return -ENOPROTOOPT; | |
2122 | } | |
2123 | #endif | |
2124 | ||
2125 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2126 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2127 | { |
2128 | struct xfrm_user_migrate um; | |
2129 | ||
2130 | memset(&um, 0, sizeof(um)); | |
2131 | um.proto = m->proto; | |
2132 | um.mode = m->mode; | |
2133 | um.reqid = m->reqid; | |
2134 | um.old_family = m->old_family; | |
2135 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2136 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2137 | um.new_family = m->new_family; | |
2138 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2139 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2140 | ||
c0144bea | 2141 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2142 | } |
2143 | ||
183cad12 | 2144 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2145 | { |
2146 | struct xfrm_user_kmaddress uk; | |
2147 | ||
2148 | memset(&uk, 0, sizeof(uk)); | |
2149 | uk.family = k->family; | |
2150 | uk.reserved = k->reserved; | |
2151 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2152 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2153 | |
2154 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2155 | } | |
2156 | ||
2157 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2158 | { |
2159 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2160 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2161 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2162 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2163 | } |
2164 | ||
183cad12 DM |
2165 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2166 | int num_migrate, const struct xfrm_kmaddress *k, | |
2167 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2168 | { |
183cad12 | 2169 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2170 | struct xfrm_userpolicy_id *pol_id; |
2171 | struct nlmsghdr *nlh; | |
1d1e34dd | 2172 | int i, err; |
5c79de6e | 2173 | |
79b8b7f4 TG |
2174 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2175 | if (nlh == NULL) | |
2176 | return -EMSGSIZE; | |
5c79de6e | 2177 | |
7b67c857 | 2178 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2179 | /* copy data from selector, dir, and type to the pol_id */ |
2180 | memset(pol_id, 0, sizeof(*pol_id)); | |
2181 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2182 | pol_id->dir = dir; | |
2183 | ||
1d1e34dd DM |
2184 | if (k != NULL) { |
2185 | err = copy_to_user_kmaddress(k, skb); | |
2186 | if (err) | |
2187 | goto out_cancel; | |
2188 | } | |
2189 | err = copy_to_user_policy_type(type, skb); | |
2190 | if (err) | |
2191 | goto out_cancel; | |
5c79de6e | 2192 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2193 | err = copy_to_user_migrate(mp, skb); |
2194 | if (err) | |
2195 | goto out_cancel; | |
5c79de6e SS |
2196 | } |
2197 | ||
9825069d | 2198 | return nlmsg_end(skb, nlh); |
1d1e34dd DM |
2199 | |
2200 | out_cancel: | |
9825069d | 2201 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2202 | return err; |
5c79de6e SS |
2203 | } |
2204 | ||
183cad12 DM |
2205 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2206 | const struct xfrm_migrate *m, int num_migrate, | |
2207 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2208 | { |
a6483b79 | 2209 | struct net *net = &init_net; |
5c79de6e | 2210 | struct sk_buff *skb; |
5c79de6e | 2211 | |
13c1d189 | 2212 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2213 | if (skb == NULL) |
2214 | return -ENOMEM; | |
2215 | ||
2216 | /* build migrate */ | |
13c1d189 | 2217 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2218 | BUG(); |
2219 | ||
a6483b79 | 2220 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2221 | } |
2222 | #else | |
183cad12 DM |
2223 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2224 | const struct xfrm_migrate *m, int num_migrate, | |
2225 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2226 | { |
2227 | return -ENOPROTOOPT; | |
2228 | } | |
2229 | #endif | |
d51d081d | 2230 | |
a7bd9a45 | 2231 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2232 | |
2233 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2234 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2235 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2236 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2237 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2238 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2239 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2240 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2241 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2242 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2243 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2244 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2245 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2246 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2247 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2248 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2249 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2250 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2251 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2252 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2253 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2254 | }; |
2255 | ||
492b558b TG |
2256 | #undef XMSGSIZE |
2257 | ||
cf5cb79f | 2258 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2259 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2260 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2261 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2262 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2263 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2264 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2265 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2266 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2267 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2268 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2269 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2270 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2271 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2272 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2273 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2274 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2275 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2276 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2277 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2278 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2279 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2280 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2281 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
cf5cb79f TG |
2282 | }; |
2283 | ||
1da177e4 | 2284 | static struct xfrm_link { |
5424f32e | 2285 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2286 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2287 | int (*done)(struct netlink_callback *); |
492b558b TG |
2288 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2289 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2290 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2291 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2292 | .dump = xfrm_dump_sa, |
2293 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2294 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2295 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2296 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2297 | .dump = xfrm_dump_policy, |
2298 | .done = xfrm_dump_policy_done }, | |
492b558b | 2299 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2300 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2301 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2302 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2303 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2304 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2305 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2306 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2307 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2308 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2309 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2310 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2311 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2312 | }; |
2313 | ||
1d00a4eb | 2314 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2315 | { |
a6483b79 | 2316 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2317 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2318 | struct xfrm_link *link; |
a7bd9a45 | 2319 | int type, err; |
1da177e4 | 2320 | |
1da177e4 | 2321 | type = nlh->nlmsg_type; |
1da177e4 | 2322 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2323 | return -EINVAL; |
1da177e4 LT |
2324 | |
2325 | type -= XFRM_MSG_BASE; | |
2326 | link = &xfrm_dispatch[type]; | |
2327 | ||
2328 | /* All operations require privileges, even GET */ | |
fd778461 | 2329 | if (!capable(CAP_NET_ADMIN)) |
1d00a4eb | 2330 | return -EPERM; |
1da177e4 | 2331 | |
492b558b TG |
2332 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2333 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2334 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2335 | if (link->dump == NULL) |
1d00a4eb | 2336 | return -EINVAL; |
88fc2c84 | 2337 | |
80d326fa PNA |
2338 | { |
2339 | struct netlink_dump_control c = { | |
2340 | .dump = link->dump, | |
2341 | .done = link->done, | |
2342 | }; | |
2343 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2344 | } | |
1da177e4 LT |
2345 | } |
2346 | ||
35a7aa08 | 2347 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2348 | xfrma_policy); |
a7bd9a45 TG |
2349 | if (err < 0) |
2350 | return err; | |
1da177e4 LT |
2351 | |
2352 | if (link->doit == NULL) | |
1d00a4eb | 2353 | return -EINVAL; |
1da177e4 | 2354 | |
5424f32e | 2355 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2356 | } |
2357 | ||
cd40b7d3 | 2358 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2359 | { |
cd40b7d3 DL |
2360 | mutex_lock(&xfrm_cfg_mutex); |
2361 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2362 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2363 | } |
2364 | ||
7deb2264 TG |
2365 | static inline size_t xfrm_expire_msgsize(void) |
2366 | { | |
6f26b61e JHS |
2367 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2368 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2369 | } |
2370 | ||
214e005b | 2371 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2372 | { |
2373 | struct xfrm_user_expire *ue; | |
2374 | struct nlmsghdr *nlh; | |
1d1e34dd | 2375 | int err; |
1da177e4 | 2376 | |
79b8b7f4 TG |
2377 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2378 | if (nlh == NULL) | |
2379 | return -EMSGSIZE; | |
1da177e4 | 2380 | |
7b67c857 | 2381 | ue = nlmsg_data(nlh); |
1da177e4 | 2382 | copy_to_user_state(x, &ue->state); |
d51d081d | 2383 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2384 | |
1d1e34dd DM |
2385 | err = xfrm_mark_put(skb, &x->mark); |
2386 | if (err) | |
2387 | return err; | |
6f26b61e | 2388 | |
9825069d | 2389 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2390 | } |
2391 | ||
214e005b | 2392 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2393 | { |
fc34acd3 | 2394 | struct net *net = xs_net(x); |
1da177e4 LT |
2395 | struct sk_buff *skb; |
2396 | ||
7deb2264 | 2397 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2398 | if (skb == NULL) |
2399 | return -ENOMEM; | |
2400 | ||
6f26b61e JHS |
2401 | if (build_expire(skb, x, c) < 0) { |
2402 | kfree_skb(skb); | |
2403 | return -EMSGSIZE; | |
2404 | } | |
1da177e4 | 2405 | |
a6483b79 | 2406 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2407 | } |
2408 | ||
214e005b | 2409 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2410 | { |
fc34acd3 | 2411 | struct net *net = xs_net(x); |
d51d081d | 2412 | struct sk_buff *skb; |
d51d081d | 2413 | |
d8647b79 | 2414 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2415 | if (skb == NULL) |
2416 | return -ENOMEM; | |
2417 | ||
2418 | if (build_aevent(skb, x, c) < 0) | |
2419 | BUG(); | |
2420 | ||
a6483b79 | 2421 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2422 | } |
2423 | ||
214e005b | 2424 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2425 | { |
7067802e | 2426 | struct net *net = c->net; |
26b15dad JHS |
2427 | struct xfrm_usersa_flush *p; |
2428 | struct nlmsghdr *nlh; | |
2429 | struct sk_buff *skb; | |
7deb2264 | 2430 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2431 | |
7deb2264 | 2432 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2433 | if (skb == NULL) |
2434 | return -ENOMEM; | |
26b15dad | 2435 | |
79b8b7f4 TG |
2436 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2437 | if (nlh == NULL) { | |
2438 | kfree_skb(skb); | |
2439 | return -EMSGSIZE; | |
2440 | } | |
26b15dad | 2441 | |
7b67c857 | 2442 | p = nlmsg_data(nlh); |
bf08867f | 2443 | p->proto = c->data.proto; |
26b15dad | 2444 | |
9825069d | 2445 | nlmsg_end(skb, nlh); |
26b15dad | 2446 | |
a6483b79 | 2447 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2448 | } |
2449 | ||
7deb2264 | 2450 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2451 | { |
7deb2264 | 2452 | size_t l = 0; |
1a6509d9 HX |
2453 | if (x->aead) |
2454 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2455 | if (x->aalg) { |
2456 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2457 | (x->aalg->alg_key_len + 7) / 8); | |
2458 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2459 | } | |
26b15dad | 2460 | if (x->ealg) |
0f99be0d | 2461 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2462 | if (x->calg) |
7deb2264 | 2463 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2464 | if (x->encap) |
7deb2264 | 2465 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2466 | if (x->tfcpad) |
2467 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2468 | if (x->replay_esn) |
2469 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
68325d3b HX |
2470 | if (x->security) |
2471 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2472 | x->security->ctx_len); | |
2473 | if (x->coaddr) | |
2474 | l += nla_total_size(sizeof(*x->coaddr)); | |
2475 | ||
d26f3984 HX |
2476 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2477 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2478 | |
2479 | return l; | |
2480 | } | |
2481 | ||
214e005b | 2482 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2483 | { |
fc34acd3 | 2484 | struct net *net = xs_net(x); |
26b15dad | 2485 | struct xfrm_usersa_info *p; |
0603eac0 | 2486 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2487 | struct nlmsghdr *nlh; |
2488 | struct sk_buff *skb; | |
26b15dad | 2489 | int len = xfrm_sa_len(x); |
1d1e34dd | 2490 | int headlen, err; |
0603eac0 HX |
2491 | |
2492 | headlen = sizeof(*p); | |
2493 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2494 | len += nla_total_size(headlen); |
0603eac0 | 2495 | headlen = sizeof(*id); |
6f26b61e | 2496 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2497 | } |
7deb2264 | 2498 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2499 | |
7deb2264 | 2500 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2501 | if (skb == NULL) |
2502 | return -ENOMEM; | |
26b15dad | 2503 | |
79b8b7f4 | 2504 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2505 | err = -EMSGSIZE; |
79b8b7f4 | 2506 | if (nlh == NULL) |
1d1e34dd | 2507 | goto out_free_skb; |
26b15dad | 2508 | |
7b67c857 | 2509 | p = nlmsg_data(nlh); |
0603eac0 | 2510 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2511 | struct nlattr *attr; |
2512 | ||
7b67c857 | 2513 | id = nlmsg_data(nlh); |
0603eac0 HX |
2514 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2515 | id->spi = x->id.spi; | |
2516 | id->family = x->props.family; | |
2517 | id->proto = x->id.proto; | |
2518 | ||
c0144bea | 2519 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2520 | err = -EMSGSIZE; |
c0144bea | 2521 | if (attr == NULL) |
1d1e34dd | 2522 | goto out_free_skb; |
c0144bea TG |
2523 | |
2524 | p = nla_data(attr); | |
0603eac0 | 2525 | } |
1d1e34dd DM |
2526 | err = copy_to_user_state_extra(x, p, skb); |
2527 | if (err) | |
2528 | goto out_free_skb; | |
26b15dad | 2529 | |
9825069d | 2530 | nlmsg_end(skb, nlh); |
26b15dad | 2531 | |
a6483b79 | 2532 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2533 | |
1d1e34dd | 2534 | out_free_skb: |
26b15dad | 2535 | kfree_skb(skb); |
1d1e34dd | 2536 | return err; |
26b15dad JHS |
2537 | } |
2538 | ||
214e005b | 2539 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2540 | { |
2541 | ||
2542 | switch (c->event) { | |
f60f6b8f | 2543 | case XFRM_MSG_EXPIRE: |
26b15dad | 2544 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2545 | case XFRM_MSG_NEWAE: |
2546 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2547 | case XFRM_MSG_DELSA: |
2548 | case XFRM_MSG_UPDSA: | |
2549 | case XFRM_MSG_NEWSA: | |
26b15dad | 2550 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2551 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2552 | return xfrm_notify_sa_flush(c); |
2553 | default: | |
62db5cfd | 2554 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2555 | c->event); | |
2556 | break; | |
26b15dad JHS |
2557 | } |
2558 | ||
2559 | return 0; | |
2560 | ||
2561 | } | |
2562 | ||
7deb2264 TG |
2563 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2564 | struct xfrm_policy *xp) | |
2565 | { | |
2566 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2567 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2568 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2569 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2570 | + userpolicy_type_attrsize(); | |
2571 | } | |
2572 | ||
1da177e4 LT |
2573 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2574 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2575 | int dir) | |
2576 | { | |
1d1e34dd | 2577 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2578 | struct xfrm_user_acquire *ua; |
2579 | struct nlmsghdr *nlh; | |
1d1e34dd | 2580 | int err; |
1da177e4 | 2581 | |
79b8b7f4 TG |
2582 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2583 | if (nlh == NULL) | |
2584 | return -EMSGSIZE; | |
1da177e4 | 2585 | |
7b67c857 | 2586 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2587 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2588 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2589 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2590 | copy_to_user_policy(xp, &ua->policy, dir); | |
2591 | ua->aalgos = xt->aalgos; | |
2592 | ua->ealgos = xt->ealgos; | |
2593 | ua->calgos = xt->calgos; | |
2594 | ua->seq = x->km.seq = seq; | |
2595 | ||
1d1e34dd DM |
2596 | err = copy_to_user_tmpl(xp, skb); |
2597 | if (!err) | |
2598 | err = copy_to_user_state_sec_ctx(x, skb); | |
2599 | if (!err) | |
2600 | err = copy_to_user_policy_type(xp->type, skb); | |
2601 | if (!err) | |
2602 | err = xfrm_mark_put(skb, &xp->mark); | |
2603 | if (err) { | |
2604 | nlmsg_cancel(skb, nlh); | |
2605 | return err; | |
2606 | } | |
1da177e4 | 2607 | |
9825069d | 2608 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2609 | } |
2610 | ||
2611 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2612 | struct xfrm_policy *xp, int dir) | |
2613 | { | |
a6483b79 | 2614 | struct net *net = xs_net(x); |
1da177e4 | 2615 | struct sk_buff *skb; |
1da177e4 | 2616 | |
7deb2264 | 2617 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2618 | if (skb == NULL) |
2619 | return -ENOMEM; | |
2620 | ||
2621 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2622 | BUG(); | |
2623 | ||
a6483b79 | 2624 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2625 | } |
2626 | ||
2627 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2628 | * or more templates. | |
2629 | */ | |
cb969f07 | 2630 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2631 | u8 *data, int len, int *dir) |
2632 | { | |
fc34acd3 | 2633 | struct net *net = sock_net(sk); |
1da177e4 LT |
2634 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2635 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2636 | struct xfrm_policy *xp; | |
2637 | int nr; | |
2638 | ||
cb969f07 | 2639 | switch (sk->sk_family) { |
1da177e4 LT |
2640 | case AF_INET: |
2641 | if (opt != IP_XFRM_POLICY) { | |
2642 | *dir = -EOPNOTSUPP; | |
2643 | return NULL; | |
2644 | } | |
2645 | break; | |
dfd56b8b | 2646 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2647 | case AF_INET6: |
2648 | if (opt != IPV6_XFRM_POLICY) { | |
2649 | *dir = -EOPNOTSUPP; | |
2650 | return NULL; | |
2651 | } | |
2652 | break; | |
2653 | #endif | |
2654 | default: | |
2655 | *dir = -EINVAL; | |
2656 | return NULL; | |
2657 | } | |
2658 | ||
2659 | *dir = -EINVAL; | |
2660 | ||
2661 | if (len < sizeof(*p) || | |
2662 | verify_newpolicy_info(p)) | |
2663 | return NULL; | |
2664 | ||
2665 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2666 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2667 | return NULL; |
2668 | ||
a4f1bac6 HX |
2669 | if (p->dir > XFRM_POLICY_OUT) |
2670 | return NULL; | |
2671 | ||
2f09a4d5 | 2672 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2673 | if (xp == NULL) { |
2674 | *dir = -ENOBUFS; | |
2675 | return NULL; | |
2676 | } | |
2677 | ||
2678 | copy_from_user_policy(xp, p); | |
f7b6983f | 2679 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2680 | copy_templates(xp, ut, nr); |
2681 | ||
2682 | *dir = p->dir; | |
2683 | ||
2684 | return xp; | |
2685 | } | |
2686 | ||
7deb2264 TG |
2687 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2688 | { | |
2689 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2690 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2691 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2692 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2693 | + userpolicy_type_attrsize(); |
2694 | } | |
2695 | ||
1da177e4 | 2696 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2697 | int dir, const struct km_event *c) |
1da177e4 LT |
2698 | { |
2699 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2700 | int hard = c->data.hard; |
1d1e34dd DM |
2701 | struct nlmsghdr *nlh; |
2702 | int err; | |
1da177e4 | 2703 | |
79b8b7f4 TG |
2704 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2705 | if (nlh == NULL) | |
2706 | return -EMSGSIZE; | |
1da177e4 | 2707 | |
7b67c857 | 2708 | upe = nlmsg_data(nlh); |
1da177e4 | 2709 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2710 | err = copy_to_user_tmpl(xp, skb); |
2711 | if (!err) | |
2712 | err = copy_to_user_sec_ctx(xp, skb); | |
2713 | if (!err) | |
2714 | err = copy_to_user_policy_type(xp->type, skb); | |
2715 | if (!err) | |
2716 | err = xfrm_mark_put(skb, &xp->mark); | |
2717 | if (err) { | |
2718 | nlmsg_cancel(skb, nlh); | |
2719 | return err; | |
2720 | } | |
1da177e4 LT |
2721 | upe->hard = !!hard; |
2722 | ||
9825069d | 2723 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2724 | } |
2725 | ||
214e005b | 2726 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2727 | { |
fc34acd3 | 2728 | struct net *net = xp_net(xp); |
1da177e4 | 2729 | struct sk_buff *skb; |
1da177e4 | 2730 | |
7deb2264 | 2731 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2732 | if (skb == NULL) |
2733 | return -ENOMEM; | |
2734 | ||
d51d081d | 2735 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2736 | BUG(); |
2737 | ||
a6483b79 | 2738 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2739 | } |
2740 | ||
214e005b | 2741 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2742 | { |
1d1e34dd | 2743 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2744 | struct net *net = xp_net(xp); |
26b15dad | 2745 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2746 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2747 | struct nlmsghdr *nlh; |
2748 | struct sk_buff *skb; | |
1d1e34dd | 2749 | int headlen, err; |
0603eac0 HX |
2750 | |
2751 | headlen = sizeof(*p); | |
2752 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2753 | len += nla_total_size(headlen); |
0603eac0 HX |
2754 | headlen = sizeof(*id); |
2755 | } | |
cfbfd45a | 2756 | len += userpolicy_type_attrsize(); |
295fae56 | 2757 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2758 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2759 | |
7deb2264 | 2760 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2761 | if (skb == NULL) |
2762 | return -ENOMEM; | |
26b15dad | 2763 | |
79b8b7f4 | 2764 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2765 | err = -EMSGSIZE; |
79b8b7f4 | 2766 | if (nlh == NULL) |
1d1e34dd | 2767 | goto out_free_skb; |
26b15dad | 2768 | |
7b67c857 | 2769 | p = nlmsg_data(nlh); |
0603eac0 | 2770 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2771 | struct nlattr *attr; |
2772 | ||
7b67c857 | 2773 | id = nlmsg_data(nlh); |
0603eac0 HX |
2774 | memset(id, 0, sizeof(*id)); |
2775 | id->dir = dir; | |
2776 | if (c->data.byid) | |
2777 | id->index = xp->index; | |
2778 | else | |
2779 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2780 | ||
c0144bea | 2781 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2782 | err = -EMSGSIZE; |
c0144bea | 2783 | if (attr == NULL) |
1d1e34dd | 2784 | goto out_free_skb; |
c0144bea TG |
2785 | |
2786 | p = nla_data(attr); | |
0603eac0 | 2787 | } |
26b15dad | 2788 | |
26b15dad | 2789 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2790 | err = copy_to_user_tmpl(xp, skb); |
2791 | if (!err) | |
2792 | err = copy_to_user_policy_type(xp->type, skb); | |
2793 | if (!err) | |
2794 | err = xfrm_mark_put(skb, &xp->mark); | |
2795 | if (err) | |
2796 | goto out_free_skb; | |
295fae56 | 2797 | |
9825069d | 2798 | nlmsg_end(skb, nlh); |
26b15dad | 2799 | |
a6483b79 | 2800 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2801 | |
1d1e34dd | 2802 | out_free_skb: |
26b15dad | 2803 | kfree_skb(skb); |
1d1e34dd | 2804 | return err; |
26b15dad JHS |
2805 | } |
2806 | ||
214e005b | 2807 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2808 | { |
7067802e | 2809 | struct net *net = c->net; |
26b15dad JHS |
2810 | struct nlmsghdr *nlh; |
2811 | struct sk_buff *skb; | |
1d1e34dd | 2812 | int err; |
26b15dad | 2813 | |
7deb2264 | 2814 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2815 | if (skb == NULL) |
2816 | return -ENOMEM; | |
26b15dad | 2817 | |
79b8b7f4 | 2818 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2819 | err = -EMSGSIZE; |
79b8b7f4 | 2820 | if (nlh == NULL) |
1d1e34dd DM |
2821 | goto out_free_skb; |
2822 | err = copy_to_user_policy_type(c->data.type, skb); | |
2823 | if (err) | |
2824 | goto out_free_skb; | |
26b15dad | 2825 | |
9825069d | 2826 | nlmsg_end(skb, nlh); |
26b15dad | 2827 | |
a6483b79 | 2828 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2829 | |
1d1e34dd | 2830 | out_free_skb: |
26b15dad | 2831 | kfree_skb(skb); |
1d1e34dd | 2832 | return err; |
26b15dad JHS |
2833 | } |
2834 | ||
214e005b | 2835 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2836 | { |
2837 | ||
2838 | switch (c->event) { | |
f60f6b8f HX |
2839 | case XFRM_MSG_NEWPOLICY: |
2840 | case XFRM_MSG_UPDPOLICY: | |
2841 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2842 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2843 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2844 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2845 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2846 | return xfrm_exp_policy_notify(xp, dir, c); |
2847 | default: | |
62db5cfd | 2848 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2849 | c->event); | |
26b15dad JHS |
2850 | } |
2851 | ||
2852 | return 0; | |
2853 | ||
2854 | } | |
2855 | ||
7deb2264 TG |
2856 | static inline size_t xfrm_report_msgsize(void) |
2857 | { | |
2858 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2859 | } | |
2860 | ||
97a64b45 MN |
2861 | static int build_report(struct sk_buff *skb, u8 proto, |
2862 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2863 | { | |
2864 | struct xfrm_user_report *ur; | |
2865 | struct nlmsghdr *nlh; | |
97a64b45 | 2866 | |
79b8b7f4 TG |
2867 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2868 | if (nlh == NULL) | |
2869 | return -EMSGSIZE; | |
97a64b45 | 2870 | |
7b67c857 | 2871 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2872 | ur->proto = proto; |
2873 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2874 | ||
1d1e34dd DM |
2875 | if (addr) { |
2876 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2877 | if (err) { | |
2878 | nlmsg_cancel(skb, nlh); | |
2879 | return err; | |
2880 | } | |
2881 | } | |
9825069d | 2882 | return nlmsg_end(skb, nlh); |
97a64b45 MN |
2883 | } |
2884 | ||
db983c11 AD |
2885 | static int xfrm_send_report(struct net *net, u8 proto, |
2886 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2887 | { |
2888 | struct sk_buff *skb; | |
97a64b45 | 2889 | |
7deb2264 | 2890 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2891 | if (skb == NULL) |
2892 | return -ENOMEM; | |
2893 | ||
2894 | if (build_report(skb, proto, sel, addr) < 0) | |
2895 | BUG(); | |
2896 | ||
a6483b79 | 2897 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2898 | } |
2899 | ||
3a2dfbe8 MW |
2900 | static inline size_t xfrm_mapping_msgsize(void) |
2901 | { | |
2902 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2903 | } | |
2904 | ||
2905 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2906 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2907 | { | |
2908 | struct xfrm_user_mapping *um; | |
2909 | struct nlmsghdr *nlh; | |
2910 | ||
2911 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2912 | if (nlh == NULL) | |
2913 | return -EMSGSIZE; | |
2914 | ||
2915 | um = nlmsg_data(nlh); | |
2916 | ||
2917 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2918 | um->id.spi = x->id.spi; | |
2919 | um->id.family = x->props.family; | |
2920 | um->id.proto = x->id.proto; | |
2921 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2922 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2923 | um->new_sport = new_sport; | |
2924 | um->old_sport = x->encap->encap_sport; | |
2925 | um->reqid = x->props.reqid; | |
2926 | ||
2927 | return nlmsg_end(skb, nlh); | |
2928 | } | |
2929 | ||
2930 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2931 | __be16 sport) | |
2932 | { | |
a6483b79 | 2933 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2934 | struct sk_buff *skb; |
2935 | ||
2936 | if (x->id.proto != IPPROTO_ESP) | |
2937 | return -EINVAL; | |
2938 | ||
2939 | if (!x->encap) | |
2940 | return -EINVAL; | |
2941 | ||
2942 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2943 | if (skb == NULL) | |
2944 | return -ENOMEM; | |
2945 | ||
2946 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2947 | BUG(); | |
2948 | ||
a6483b79 | 2949 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2950 | } |
2951 | ||
1da177e4 LT |
2952 | static struct xfrm_mgr netlink_mgr = { |
2953 | .id = "netlink", | |
2954 | .notify = xfrm_send_state_notify, | |
2955 | .acquire = xfrm_send_acquire, | |
2956 | .compile_policy = xfrm_compile_policy, | |
2957 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2958 | .report = xfrm_send_report, |
5c79de6e | 2959 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2960 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2961 | }; |
2962 | ||
a6483b79 | 2963 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2964 | { |
be33690d | 2965 | struct sock *nlsk; |
a31f2d17 PNA |
2966 | struct netlink_kernel_cfg cfg = { |
2967 | .groups = XFRMNLGRP_MAX, | |
2968 | .input = xfrm_netlink_rcv, | |
2969 | }; | |
be33690d | 2970 | |
a31f2d17 | 2971 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, THIS_MODULE, &cfg); |
be33690d | 2972 | if (nlsk == NULL) |
1da177e4 | 2973 | return -ENOMEM; |
d79d792e | 2974 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 2975 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2976 | return 0; |
2977 | } | |
2978 | ||
d79d792e | 2979 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 2980 | { |
d79d792e EB |
2981 | struct net *net; |
2982 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 2983 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
2984 | synchronize_net(); |
2985 | list_for_each_entry(net, net_exit_list, exit_list) | |
2986 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
2987 | } |
2988 | ||
a6483b79 | 2989 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
2990 | .init = xfrm_user_net_init, |
2991 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
2992 | }; |
2993 | ||
2994 | static int __init xfrm_user_init(void) | |
2995 | { | |
2996 | int rv; | |
2997 | ||
2998 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
2999 | ||
3000 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3001 | if (rv < 0) | |
3002 | return rv; | |
3003 | rv = xfrm_register_km(&netlink_mgr); | |
3004 | if (rv < 0) | |
3005 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3006 | return rv; | |
3007 | } | |
3008 | ||
3009 | static void __exit xfrm_user_exit(void) | |
3010 | { | |
3011 | xfrm_unregister_km(&netlink_mgr); | |
3012 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3013 | } | |
3014 | ||
1da177e4 LT |
3015 | module_init(xfrm_user_init); |
3016 | module_exit(xfrm_user_exit); | |
3017 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3018 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3019 |