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); | |
745 | strcpy(algo->alg_name, auth->alg_name); | |
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 | { |
1da177e4 LT |
757 | copy_to_user_state(x, p); |
758 | ||
d0fde795 DM |
759 | if (x->coaddr && |
760 | nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr)) | |
761 | goto nla_put_failure; | |
050f009e | 762 | |
d0fde795 DM |
763 | if (x->lastused && |
764 | nla_put_u64(skb, XFRMA_LASTUSED, x->lastused)) | |
765 | goto nla_put_failure; | |
050f009e | 766 | |
d0fde795 DM |
767 | if (x->aead && |
768 | nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead)) | |
769 | goto nla_put_failure; | |
4447bb33 | 770 | |
d0fde795 DM |
771 | if (x->aalg && |
772 | (copy_to_user_auth(x->aalg, skb) || | |
773 | nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
774 | xfrm_alg_auth_len(x->aalg), x->aalg))) | |
775 | goto nla_put_failure; | |
1da177e4 | 776 | |
d0fde795 DM |
777 | if (x->ealg && |
778 | nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg)) | |
779 | goto nla_put_failure; | |
1da177e4 | 780 | |
d0fde795 DM |
781 | if (x->calg && |
782 | nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg)) | |
783 | goto nla_put_failure; | |
784 | ||
785 | if (x->encap && | |
786 | nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap)) | |
787 | goto nla_put_failure; | |
788 | ||
789 | if (x->tfcpad && | |
790 | nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad)) | |
791 | goto nla_put_failure; | |
35d2856b | 792 | |
6f26b61e JHS |
793 | if (xfrm_mark_put(skb, &x->mark)) |
794 | goto nla_put_failure; | |
795 | ||
d0fde795 DM |
796 | if (x->replay_esn && |
797 | nla_put(skb, XFRMA_REPLAY_ESN_VAL, | |
798 | xfrm_replay_state_esn_len(x->replay_esn), | |
799 | x->replay_esn)) | |
800 | goto nla_put_failure; | |
d8647b79 | 801 | |
d0fde795 | 802 | if (x->security && copy_sec_ctx(x->security, skb)) |
c0144bea | 803 | goto nla_put_failure; |
060f02a3 | 804 | |
68325d3b HX |
805 | return 0; |
806 | ||
807 | nla_put_failure: | |
808 | return -EMSGSIZE; | |
809 | } | |
810 | ||
811 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
812 | { | |
813 | struct xfrm_dump_info *sp = ptr; | |
814 | struct sk_buff *in_skb = sp->in_skb; | |
815 | struct sk_buff *skb = sp->out_skb; | |
816 | struct xfrm_usersa_info *p; | |
817 | struct nlmsghdr *nlh; | |
818 | int err; | |
819 | ||
68325d3b HX |
820 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
821 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
822 | if (nlh == NULL) | |
823 | return -EMSGSIZE; | |
824 | ||
825 | p = nlmsg_data(nlh); | |
826 | ||
827 | err = copy_to_user_state_extra(x, p, skb); | |
828 | if (err) | |
829 | goto nla_put_failure; | |
830 | ||
9825069d | 831 | nlmsg_end(skb, nlh); |
1da177e4 LT |
832 | return 0; |
833 | ||
c0144bea | 834 | nla_put_failure: |
9825069d | 835 | nlmsg_cancel(skb, nlh); |
68325d3b | 836 | return err; |
1da177e4 LT |
837 | } |
838 | ||
4c563f76 TT |
839 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
840 | { | |
841 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
842 | xfrm_state_walk_done(walk); | |
843 | return 0; | |
844 | } | |
845 | ||
1da177e4 LT |
846 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
847 | { | |
fc34acd3 | 848 | struct net *net = sock_net(skb->sk); |
4c563f76 | 849 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
850 | struct xfrm_dump_info info; |
851 | ||
4c563f76 TT |
852 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
853 | sizeof(cb->args) - sizeof(cb->args[0])); | |
854 | ||
1da177e4 LT |
855 | info.in_skb = cb->skb; |
856 | info.out_skb = skb; | |
857 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
858 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
859 | |
860 | if (!cb->args[0]) { | |
861 | cb->args[0] = 1; | |
862 | xfrm_state_walk_init(walk, 0); | |
863 | } | |
864 | ||
fc34acd3 | 865 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
866 | |
867 | return skb->len; | |
868 | } | |
869 | ||
870 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
871 | struct xfrm_state *x, u32 seq) | |
872 | { | |
873 | struct xfrm_dump_info info; | |
874 | struct sk_buff *skb; | |
875 | ||
7deb2264 | 876 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
877 | if (!skb) |
878 | return ERR_PTR(-ENOMEM); | |
879 | ||
1da177e4 LT |
880 | info.in_skb = in_skb; |
881 | info.out_skb = skb; | |
882 | info.nlmsg_seq = seq; | |
883 | info.nlmsg_flags = 0; | |
1da177e4 LT |
884 | |
885 | if (dump_one_state(x, 0, &info)) { | |
886 | kfree_skb(skb); | |
887 | return NULL; | |
888 | } | |
889 | ||
890 | return skb; | |
891 | } | |
892 | ||
7deb2264 TG |
893 | static inline size_t xfrm_spdinfo_msgsize(void) |
894 | { | |
895 | return NLMSG_ALIGN(4) | |
896 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
897 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
898 | } | |
899 | ||
e071041b AD |
900 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
901 | u32 pid, u32 seq, u32 flags) | |
ecfd6b18 | 902 | { |
5a6d3416 JHS |
903 | struct xfrmk_spdinfo si; |
904 | struct xfrmu_spdinfo spc; | |
905 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
906 | struct nlmsghdr *nlh; |
907 | u32 *f; | |
908 | ||
909 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
25985edc | 910 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
911 | return -EMSGSIZE; |
912 | ||
913 | f = nlmsg_data(nlh); | |
914 | *f = flags; | |
e071041b | 915 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
916 | spc.incnt = si.incnt; |
917 | spc.outcnt = si.outcnt; | |
918 | spc.fwdcnt = si.fwdcnt; | |
919 | spc.inscnt = si.inscnt; | |
920 | spc.outscnt = si.outscnt; | |
921 | spc.fwdscnt = si.fwdscnt; | |
922 | sph.spdhcnt = si.spdhcnt; | |
923 | sph.spdhmcnt = si.spdhmcnt; | |
924 | ||
d0fde795 DM |
925 | if (nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc) || |
926 | nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph)) | |
927 | goto nla_put_failure; | |
ecfd6b18 JHS |
928 | |
929 | return nlmsg_end(skb, nlh); | |
930 | ||
931 | nla_put_failure: | |
932 | nlmsg_cancel(skb, nlh); | |
933 | return -EMSGSIZE; | |
934 | } | |
935 | ||
936 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 937 | struct nlattr **attrs) |
ecfd6b18 | 938 | { |
a6483b79 | 939 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 940 | struct sk_buff *r_skb; |
7b67c857 | 941 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
942 | u32 spid = NETLINK_CB(skb).pid; |
943 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 944 | |
7deb2264 | 945 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
946 | if (r_skb == NULL) |
947 | return -ENOMEM; | |
948 | ||
e071041b | 949 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
ecfd6b18 JHS |
950 | BUG(); |
951 | ||
a6483b79 | 952 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
953 | } |
954 | ||
7deb2264 TG |
955 | static inline size_t xfrm_sadinfo_msgsize(void) |
956 | { | |
957 | return NLMSG_ALIGN(4) | |
958 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
959 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
960 | } | |
961 | ||
e071041b AD |
962 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
963 | u32 pid, u32 seq, u32 flags) | |
28d8909b | 964 | { |
af11e316 JHS |
965 | struct xfrmk_sadinfo si; |
966 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
967 | struct nlmsghdr *nlh; |
968 | u32 *f; | |
969 | ||
970 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
25985edc | 971 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
972 | return -EMSGSIZE; |
973 | ||
974 | f = nlmsg_data(nlh); | |
975 | *f = flags; | |
e071041b | 976 | xfrm_sad_getinfo(net, &si); |
28d8909b | 977 | |
af11e316 JHS |
978 | sh.sadhmcnt = si.sadhmcnt; |
979 | sh.sadhcnt = si.sadhcnt; | |
980 | ||
d0fde795 DM |
981 | if (nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt) || |
982 | nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh)) | |
983 | goto nla_put_failure; | |
28d8909b JHS |
984 | |
985 | return nlmsg_end(skb, nlh); | |
986 | ||
987 | nla_put_failure: | |
988 | nlmsg_cancel(skb, nlh); | |
989 | return -EMSGSIZE; | |
990 | } | |
991 | ||
992 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 993 | struct nlattr **attrs) |
28d8909b | 994 | { |
a6483b79 | 995 | struct net *net = sock_net(skb->sk); |
28d8909b | 996 | struct sk_buff *r_skb; |
7b67c857 | 997 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
998 | u32 spid = NETLINK_CB(skb).pid; |
999 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 1000 | |
7deb2264 | 1001 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1002 | if (r_skb == NULL) |
1003 | return -ENOMEM; | |
1004 | ||
e071041b | 1005 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
28d8909b JHS |
1006 | BUG(); |
1007 | ||
a6483b79 | 1008 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
1009 | } |
1010 | ||
22e70050 | 1011 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1012 | struct nlattr **attrs) |
1da177e4 | 1013 | { |
fc34acd3 | 1014 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1015 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1016 | struct xfrm_state *x; |
1017 | struct sk_buff *resp_skb; | |
eb2971b6 | 1018 | int err = -ESRCH; |
1da177e4 | 1019 | |
fc34acd3 | 1020 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1021 | if (x == NULL) |
1022 | goto out_noput; | |
1023 | ||
1024 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1025 | if (IS_ERR(resp_skb)) { | |
1026 | err = PTR_ERR(resp_skb); | |
1027 | } else { | |
a6483b79 | 1028 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1029 | } |
1030 | xfrm_state_put(x); | |
1031 | out_noput: | |
1032 | return err; | |
1033 | } | |
1034 | ||
1035 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
1036 | { | |
1037 | switch (p->info.id.proto) { | |
1038 | case IPPROTO_AH: | |
1039 | case IPPROTO_ESP: | |
1040 | break; | |
1041 | ||
1042 | case IPPROTO_COMP: | |
1043 | /* IPCOMP spi is 16-bits. */ | |
1044 | if (p->max >= 0x10000) | |
1045 | return -EINVAL; | |
1046 | break; | |
1047 | ||
1048 | default: | |
1049 | return -EINVAL; | |
3ff50b79 | 1050 | } |
1da177e4 LT |
1051 | |
1052 | if (p->min > p->max) | |
1053 | return -EINVAL; | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
22e70050 | 1058 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1059 | struct nlattr **attrs) |
1da177e4 | 1060 | { |
fc34acd3 | 1061 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1062 | struct xfrm_state *x; |
1063 | struct xfrm_userspi_info *p; | |
1064 | struct sk_buff *resp_skb; | |
1065 | xfrm_address_t *daddr; | |
1066 | int family; | |
1067 | int err; | |
6f26b61e JHS |
1068 | u32 mark; |
1069 | struct xfrm_mark m; | |
1da177e4 | 1070 | |
7b67c857 | 1071 | p = nlmsg_data(nlh); |
1da177e4 LT |
1072 | err = verify_userspi_info(p); |
1073 | if (err) | |
1074 | goto out_noput; | |
1075 | ||
1076 | family = p->info.family; | |
1077 | daddr = &p->info.id.daddr; | |
1078 | ||
1079 | x = NULL; | |
6f26b61e JHS |
1080 | |
1081 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1082 | if (p->info.seq) { |
6f26b61e | 1083 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
1da177e4 LT |
1084 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
1085 | xfrm_state_put(x); | |
1086 | x = NULL; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | if (!x) | |
6f26b61e | 1091 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1092 | p->info.id.proto, daddr, |
1093 | &p->info.saddr, 1, | |
1094 | family); | |
1095 | err = -ENOENT; | |
1096 | if (x == NULL) | |
1097 | goto out_noput; | |
1098 | ||
658b219e HX |
1099 | err = xfrm_alloc_spi(x, p->min, p->max); |
1100 | if (err) | |
1101 | goto out; | |
1da177e4 | 1102 | |
658b219e | 1103 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1104 | if (IS_ERR(resp_skb)) { |
1105 | err = PTR_ERR(resp_skb); | |
1106 | goto out; | |
1107 | } | |
1108 | ||
a6483b79 | 1109 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1110 | |
1111 | out: | |
1112 | xfrm_state_put(x); | |
1113 | out_noput: | |
1114 | return err; | |
1115 | } | |
1116 | ||
b798a9ed | 1117 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1118 | { |
1119 | switch (dir) { | |
1120 | case XFRM_POLICY_IN: | |
1121 | case XFRM_POLICY_OUT: | |
1122 | case XFRM_POLICY_FWD: | |
1123 | break; | |
1124 | ||
1125 | default: | |
1126 | return -EINVAL; | |
3ff50b79 | 1127 | } |
1da177e4 LT |
1128 | |
1129 | return 0; | |
1130 | } | |
1131 | ||
b798a9ed | 1132 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1133 | { |
1134 | switch (type) { | |
1135 | case XFRM_POLICY_TYPE_MAIN: | |
1136 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1137 | case XFRM_POLICY_TYPE_SUB: | |
1138 | #endif | |
1139 | break; | |
1140 | ||
1141 | default: | |
1142 | return -EINVAL; | |
3ff50b79 | 1143 | } |
f7b6983f MN |
1144 | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1da177e4 LT |
1148 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1149 | { | |
1150 | switch (p->share) { | |
1151 | case XFRM_SHARE_ANY: | |
1152 | case XFRM_SHARE_SESSION: | |
1153 | case XFRM_SHARE_USER: | |
1154 | case XFRM_SHARE_UNIQUE: | |
1155 | break; | |
1156 | ||
1157 | default: | |
1158 | return -EINVAL; | |
3ff50b79 | 1159 | } |
1da177e4 LT |
1160 | |
1161 | switch (p->action) { | |
1162 | case XFRM_POLICY_ALLOW: | |
1163 | case XFRM_POLICY_BLOCK: | |
1164 | break; | |
1165 | ||
1166 | default: | |
1167 | return -EINVAL; | |
3ff50b79 | 1168 | } |
1da177e4 LT |
1169 | |
1170 | switch (p->sel.family) { | |
1171 | case AF_INET: | |
1172 | break; | |
1173 | ||
1174 | case AF_INET6: | |
dfd56b8b | 1175 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1176 | break; |
1177 | #else | |
1178 | return -EAFNOSUPPORT; | |
1179 | #endif | |
1180 | ||
1181 | default: | |
1182 | return -EINVAL; | |
3ff50b79 | 1183 | } |
1da177e4 LT |
1184 | |
1185 | return verify_policy_dir(p->dir); | |
1186 | } | |
1187 | ||
5424f32e | 1188 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1189 | { |
5424f32e | 1190 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1191 | struct xfrm_user_sec_ctx *uctx; |
1192 | ||
1193 | if (!rt) | |
1194 | return 0; | |
1195 | ||
5424f32e | 1196 | uctx = nla_data(rt); |
03e1ad7b | 1197 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1198 | } |
1199 | ||
1da177e4 LT |
1200 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1201 | int nr) | |
1202 | { | |
1203 | int i; | |
1204 | ||
1205 | xp->xfrm_nr = nr; | |
1206 | for (i = 0; i < nr; i++, ut++) { | |
1207 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1208 | ||
1209 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1210 | memcpy(&t->saddr, &ut->saddr, | |
1211 | sizeof(xfrm_address_t)); | |
1212 | t->reqid = ut->reqid; | |
1213 | t->mode = ut->mode; | |
1214 | t->share = ut->share; | |
1215 | t->optional = ut->optional; | |
1216 | t->aalgos = ut->aalgos; | |
1217 | t->ealgos = ut->ealgos; | |
1218 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1219 | /* If all masks are ~0, then we allow all algorithms. */ |
1220 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1221 | t->encap_family = ut->family; |
1da177e4 LT |
1222 | } |
1223 | } | |
1224 | ||
b4ad86bf DM |
1225 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1226 | { | |
1227 | int i; | |
1228 | ||
1229 | if (nr > XFRM_MAX_DEPTH) | |
1230 | return -EINVAL; | |
1231 | ||
1232 | for (i = 0; i < nr; i++) { | |
1233 | /* We never validated the ut->family value, so many | |
1234 | * applications simply leave it at zero. The check was | |
1235 | * never made and ut->family was ignored because all | |
1236 | * templates could be assumed to have the same family as | |
1237 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1238 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1239 | */ | |
1240 | if (!ut[i].family) | |
1241 | ut[i].family = family; | |
1242 | ||
1243 | switch (ut[i].family) { | |
1244 | case AF_INET: | |
1245 | break; | |
dfd56b8b | 1246 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1247 | case AF_INET6: |
1248 | break; | |
1249 | #endif | |
1250 | default: | |
1251 | return -EINVAL; | |
3ff50b79 | 1252 | } |
b4ad86bf DM |
1253 | } |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
5424f32e | 1258 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1259 | { |
5424f32e | 1260 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1261 | |
1262 | if (!rt) { | |
1263 | pol->xfrm_nr = 0; | |
1264 | } else { | |
5424f32e TG |
1265 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1266 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1267 | int err; |
1da177e4 | 1268 | |
b4ad86bf DM |
1269 | err = validate_tmpl(nr, utmpl, pol->family); |
1270 | if (err) | |
1271 | return err; | |
1da177e4 | 1272 | |
5424f32e | 1273 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1274 | } |
1275 | return 0; | |
1276 | } | |
1277 | ||
5424f32e | 1278 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1279 | { |
5424f32e | 1280 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1281 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1282 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1283 | int err; |
1284 | ||
1285 | if (rt) { | |
5424f32e | 1286 | upt = nla_data(rt); |
f7b6983f MN |
1287 | type = upt->type; |
1288 | } | |
1289 | ||
1290 | err = verify_policy_type(type); | |
1291 | if (err) | |
1292 | return err; | |
1293 | ||
1294 | *tp = type; | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1da177e4 LT |
1298 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1299 | { | |
1300 | xp->priority = p->priority; | |
1301 | xp->index = p->index; | |
1302 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1303 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1304 | xp->action = p->action; | |
1305 | xp->flags = p->flags; | |
1306 | xp->family = p->sel.family; | |
1307 | /* XXX xp->share = p->share; */ | |
1308 | } | |
1309 | ||
1310 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1311 | { | |
1312 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1313 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1314 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1315 | p->priority = xp->priority; | |
1316 | p->index = xp->index; | |
1317 | p->sel.family = xp->family; | |
1318 | p->dir = dir; | |
1319 | p->action = xp->action; | |
1320 | p->flags = xp->flags; | |
1321 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1322 | } | |
1323 | ||
fc34acd3 | 1324 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1325 | { |
fc34acd3 | 1326 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1327 | int err; |
1328 | ||
1329 | if (!xp) { | |
1330 | *errp = -ENOMEM; | |
1331 | return NULL; | |
1332 | } | |
1333 | ||
1334 | copy_from_user_policy(xp, p); | |
df71837d | 1335 | |
35a7aa08 | 1336 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1337 | if (err) |
1338 | goto error; | |
1339 | ||
35a7aa08 TG |
1340 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1341 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1342 | if (err) |
1343 | goto error; | |
1da177e4 | 1344 | |
295fae56 JHS |
1345 | xfrm_mark_get(attrs, &xp->mark); |
1346 | ||
1da177e4 | 1347 | return xp; |
f7b6983f MN |
1348 | error: |
1349 | *errp = err; | |
12a169e7 | 1350 | xp->walk.dead = 1; |
64c31b3f | 1351 | xfrm_policy_destroy(xp); |
f7b6983f | 1352 | return NULL; |
1da177e4 LT |
1353 | } |
1354 | ||
22e70050 | 1355 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1356 | struct nlattr **attrs) |
1da177e4 | 1357 | { |
fc34acd3 | 1358 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1359 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1360 | struct xfrm_policy *xp; |
26b15dad | 1361 | struct km_event c; |
1da177e4 LT |
1362 | int err; |
1363 | int excl; | |
c53fa1ed PM |
1364 | uid_t loginuid = audit_get_loginuid(current); |
1365 | u32 sessionid = audit_get_sessionid(current); | |
1366 | u32 sid; | |
1da177e4 LT |
1367 | |
1368 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1369 | if (err) |
1370 | return err; | |
35a7aa08 | 1371 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1372 | if (err) |
1373 | return err; | |
1374 | ||
fc34acd3 | 1375 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1376 | if (!xp) |
1377 | return err; | |
1378 | ||
25985edc | 1379 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1380 | * Aha! this is anti-netlink really i.e more pfkey derived |
1381 | * in netlink excl is a flag and you wouldnt need | |
1382 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1383 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1384 | err = xfrm_policy_insert(p->dir, xp, excl); | |
c53fa1ed | 1385 | security_task_getsecid(current, &sid); |
2532386f | 1386 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1387 | |
1da177e4 | 1388 | if (err) { |
03e1ad7b | 1389 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1390 | kfree(xp); |
1391 | return err; | |
1392 | } | |
1393 | ||
f60f6b8f | 1394 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1395 | c.seq = nlh->nlmsg_seq; |
1396 | c.pid = nlh->nlmsg_pid; | |
1397 | km_policy_notify(xp, p->dir, &c); | |
1398 | ||
1da177e4 LT |
1399 | xfrm_pol_put(xp); |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1405 | { | |
1406 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1407 | int i; | |
1408 | ||
1409 | if (xp->xfrm_nr == 0) | |
1410 | return 0; | |
1411 | ||
1412 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1413 | struct xfrm_user_tmpl *up = &vec[i]; | |
1414 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1415 | ||
1416 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1417 | up->family = kp->encap_family; |
1da177e4 LT |
1418 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1419 | up->reqid = kp->reqid; | |
1420 | up->mode = kp->mode; | |
1421 | up->share = kp->share; | |
1422 | up->optional = kp->optional; | |
1423 | up->aalgos = kp->aalgos; | |
1424 | up->ealgos = kp->ealgos; | |
1425 | up->calgos = kp->calgos; | |
1426 | } | |
df71837d | 1427 | |
c0144bea TG |
1428 | return nla_put(skb, XFRMA_TMPL, |
1429 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1430 | } |
1431 | ||
1432 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1433 | { | |
1434 | if (x->security) { | |
1435 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1436 | } |
1437 | return 0; | |
0d681623 | 1438 | } |
df71837d | 1439 | |
0d681623 SH |
1440 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1441 | { | |
1442 | if (xp->security) { | |
1443 | return copy_sec_ctx(xp->security, skb); | |
1444 | } | |
1445 | return 0; | |
df71837d | 1446 | } |
cfbfd45a TG |
1447 | static inline size_t userpolicy_type_attrsize(void) |
1448 | { | |
1449 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1450 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1451 | #else | |
1452 | return 0; | |
1453 | #endif | |
1454 | } | |
df71837d | 1455 | |
f7b6983f | 1456 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1457 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1458 | { |
c0144bea TG |
1459 | struct xfrm_userpolicy_type upt = { |
1460 | .type = type, | |
1461 | }; | |
f7b6983f | 1462 | |
c0144bea | 1463 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1464 | } |
1465 | ||
1466 | #else | |
b798a9ed | 1467 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1468 | { |
1469 | return 0; | |
1470 | } | |
1471 | #endif | |
1472 | ||
1da177e4 LT |
1473 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1474 | { | |
1475 | struct xfrm_dump_info *sp = ptr; | |
1476 | struct xfrm_userpolicy_info *p; | |
1477 | struct sk_buff *in_skb = sp->in_skb; | |
1478 | struct sk_buff *skb = sp->out_skb; | |
1479 | struct nlmsghdr *nlh; | |
1da177e4 | 1480 | |
79b8b7f4 TG |
1481 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1482 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1483 | if (nlh == NULL) | |
1484 | return -EMSGSIZE; | |
1da177e4 | 1485 | |
7b67c857 | 1486 | p = nlmsg_data(nlh); |
1da177e4 LT |
1487 | copy_to_user_policy(xp, p, dir); |
1488 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1489 | goto nlmsg_failure; | |
df71837d TJ |
1490 | if (copy_to_user_sec_ctx(xp, skb)) |
1491 | goto nlmsg_failure; | |
1459bb36 | 1492 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1493 | goto nlmsg_failure; |
295fae56 JHS |
1494 | if (xfrm_mark_put(skb, &xp->mark)) |
1495 | goto nla_put_failure; | |
1da177e4 | 1496 | |
9825069d | 1497 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1498 | return 0; |
1499 | ||
295fae56 | 1500 | nla_put_failure: |
1da177e4 | 1501 | nlmsg_failure: |
9825069d TG |
1502 | nlmsg_cancel(skb, nlh); |
1503 | return -EMSGSIZE; | |
1da177e4 LT |
1504 | } |
1505 | ||
4c563f76 TT |
1506 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1507 | { | |
1508 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1509 | ||
1510 | xfrm_policy_walk_done(walk); | |
1511 | return 0; | |
1512 | } | |
1513 | ||
1da177e4 LT |
1514 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1515 | { | |
fc34acd3 | 1516 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1517 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1518 | struct xfrm_dump_info info; |
1519 | ||
4c563f76 TT |
1520 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1521 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1522 | ||
1da177e4 LT |
1523 | info.in_skb = cb->skb; |
1524 | info.out_skb = skb; | |
1525 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1526 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1527 | |
1528 | if (!cb->args[0]) { | |
1529 | cb->args[0] = 1; | |
1530 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1531 | } | |
1532 | ||
fc34acd3 | 1533 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1534 | |
1535 | return skb->len; | |
1536 | } | |
1537 | ||
1538 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1539 | struct xfrm_policy *xp, | |
1540 | int dir, u32 seq) | |
1541 | { | |
1542 | struct xfrm_dump_info info; | |
1543 | struct sk_buff *skb; | |
1544 | ||
7deb2264 | 1545 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1546 | if (!skb) |
1547 | return ERR_PTR(-ENOMEM); | |
1548 | ||
1da177e4 LT |
1549 | info.in_skb = in_skb; |
1550 | info.out_skb = skb; | |
1551 | info.nlmsg_seq = seq; | |
1552 | info.nlmsg_flags = 0; | |
1da177e4 LT |
1553 | |
1554 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1555 | kfree_skb(skb); | |
1556 | return NULL; | |
1557 | } | |
1558 | ||
1559 | return skb; | |
1560 | } | |
1561 | ||
22e70050 | 1562 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1563 | struct nlattr **attrs) |
1da177e4 | 1564 | { |
fc34acd3 | 1565 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1566 | struct xfrm_policy *xp; |
1567 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1568 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1569 | int err; |
26b15dad | 1570 | struct km_event c; |
1da177e4 | 1571 | int delete; |
295fae56 JHS |
1572 | struct xfrm_mark m; |
1573 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1574 | |
7b67c857 | 1575 | p = nlmsg_data(nlh); |
1da177e4 LT |
1576 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1577 | ||
35a7aa08 | 1578 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1579 | if (err) |
1580 | return err; | |
1581 | ||
1da177e4 LT |
1582 | err = verify_policy_dir(p->dir); |
1583 | if (err) | |
1584 | return err; | |
1585 | ||
1586 | if (p->index) | |
295fae56 | 1587 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1588 | else { |
5424f32e | 1589 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1590 | struct xfrm_sec_ctx *ctx; |
df71837d | 1591 | |
35a7aa08 | 1592 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1593 | if (err) |
1594 | return err; | |
1595 | ||
2c8dd116 | 1596 | ctx = NULL; |
df71837d | 1597 | if (rt) { |
5424f32e | 1598 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1599 | |
03e1ad7b PM |
1600 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1601 | if (err) | |
df71837d | 1602 | return err; |
2c8dd116 | 1603 | } |
295fae56 | 1604 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1605 | ctx, delete, &err); |
03e1ad7b | 1606 | security_xfrm_policy_free(ctx); |
df71837d | 1607 | } |
1da177e4 LT |
1608 | if (xp == NULL) |
1609 | return -ENOENT; | |
1610 | ||
1611 | if (!delete) { | |
1612 | struct sk_buff *resp_skb; | |
1613 | ||
1614 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1615 | if (IS_ERR(resp_skb)) { | |
1616 | err = PTR_ERR(resp_skb); | |
1617 | } else { | |
a6483b79 | 1618 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1619 | NETLINK_CB(skb).pid); |
1da177e4 | 1620 | } |
26b15dad | 1621 | } else { |
c53fa1ed PM |
1622 | uid_t loginuid = audit_get_loginuid(current); |
1623 | u32 sessionid = audit_get_sessionid(current); | |
1624 | u32 sid; | |
2532386f | 1625 | |
c53fa1ed | 1626 | security_task_getsecid(current, &sid); |
2532386f EP |
1627 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, |
1628 | sid); | |
13fcfbb0 DM |
1629 | |
1630 | if (err != 0) | |
c8c05a8e | 1631 | goto out; |
13fcfbb0 | 1632 | |
e7443892 | 1633 | c.data.byid = p->index; |
f60f6b8f | 1634 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1635 | c.seq = nlh->nlmsg_seq; |
1636 | c.pid = nlh->nlmsg_pid; | |
1637 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1638 | } |
1639 | ||
c8c05a8e | 1640 | out: |
ef41aaa0 | 1641 | xfrm_pol_put(xp); |
1da177e4 LT |
1642 | return err; |
1643 | } | |
1644 | ||
22e70050 | 1645 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1646 | struct nlattr **attrs) |
1da177e4 | 1647 | { |
fc34acd3 | 1648 | struct net *net = sock_net(skb->sk); |
26b15dad | 1649 | struct km_event c; |
7b67c857 | 1650 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1651 | struct xfrm_audit audit_info; |
4aa2e62c | 1652 | int err; |
1da177e4 | 1653 | |
c53fa1ed PM |
1654 | audit_info.loginuid = audit_get_loginuid(current); |
1655 | audit_info.sessionid = audit_get_sessionid(current); | |
1656 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1657 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1658 | if (err) { |
1659 | if (err == -ESRCH) /* empty table */ | |
1660 | return 0; | |
069c474e | 1661 | return err; |
9e64cc95 | 1662 | } |
bf08867f | 1663 | c.data.proto = p->proto; |
f60f6b8f | 1664 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1665 | c.seq = nlh->nlmsg_seq; |
1666 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1667 | c.net = net; |
26b15dad JHS |
1668 | km_state_notify(NULL, &c); |
1669 | ||
1da177e4 LT |
1670 | return 0; |
1671 | } | |
1672 | ||
d8647b79 | 1673 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1674 | { |
d8647b79 SK |
1675 | size_t replay_size = x->replay_esn ? |
1676 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1677 | sizeof(struct xfrm_replay_state); | |
1678 | ||
7deb2264 | 1679 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1680 | + nla_total_size(replay_size) |
7deb2264 | 1681 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1682 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1683 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1684 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1685 | } | |
d51d081d | 1686 | |
214e005b | 1687 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1688 | { |
1689 | struct xfrm_aevent_id *id; | |
1690 | struct nlmsghdr *nlh; | |
d51d081d | 1691 | |
79b8b7f4 TG |
1692 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1693 | if (nlh == NULL) | |
1694 | return -EMSGSIZE; | |
d51d081d | 1695 | |
7b67c857 | 1696 | id = nlmsg_data(nlh); |
2b5f6dcc | 1697 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1698 | id->sa_id.spi = x->id.spi; |
1699 | id->sa_id.family = x->props.family; | |
1700 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1701 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1702 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1703 | id->flags = c->data.aevent; |
1704 | ||
d0fde795 DM |
1705 | if (x->replay_esn) { |
1706 | if (nla_put(skb, XFRMA_REPLAY_ESN_VAL, | |
1707 | xfrm_replay_state_esn_len(x->replay_esn), | |
1708 | x->replay_esn)) | |
1709 | goto nla_put_failure; | |
1710 | } else { | |
1711 | if (nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), | |
1712 | &x->replay)) | |
1713 | goto nla_put_failure; | |
1714 | } | |
1715 | if (nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft)) | |
1716 | goto nla_put_failure; | |
d51d081d | 1717 | |
d0fde795 DM |
1718 | if ((id->flags & XFRM_AE_RTHR) && |
1719 | nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff)) | |
1720 | goto nla_put_failure; | |
d51d081d | 1721 | |
d0fde795 DM |
1722 | if ((id->flags & XFRM_AE_ETHR) && |
1723 | nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1724 | x->replay_maxage * 10 / HZ)) | |
1725 | goto nla_put_failure; | |
d51d081d | 1726 | |
6f26b61e JHS |
1727 | if (xfrm_mark_put(skb, &x->mark)) |
1728 | goto nla_put_failure; | |
1729 | ||
9825069d | 1730 | return nlmsg_end(skb, nlh); |
d51d081d | 1731 | |
c0144bea | 1732 | nla_put_failure: |
9825069d TG |
1733 | nlmsg_cancel(skb, nlh); |
1734 | return -EMSGSIZE; | |
d51d081d JHS |
1735 | } |
1736 | ||
22e70050 | 1737 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1738 | struct nlattr **attrs) |
d51d081d | 1739 | { |
fc34acd3 | 1740 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1741 | struct xfrm_state *x; |
1742 | struct sk_buff *r_skb; | |
1743 | int err; | |
1744 | struct km_event c; | |
6f26b61e JHS |
1745 | u32 mark; |
1746 | struct xfrm_mark m; | |
7b67c857 | 1747 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1748 | struct xfrm_usersa_id *id = &p->sa_id; |
1749 | ||
6f26b61e JHS |
1750 | mark = xfrm_mark_get(attrs, &m); |
1751 | ||
1752 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1753 | if (x == NULL) |
d51d081d | 1754 | return -ESRCH; |
d8647b79 SK |
1755 | |
1756 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1757 | if (r_skb == NULL) { | |
1758 | xfrm_state_put(x); | |
1759 | return -ENOMEM; | |
d51d081d JHS |
1760 | } |
1761 | ||
1762 | /* | |
1763 | * XXX: is this lock really needed - none of the other | |
1764 | * gets lock (the concern is things getting updated | |
1765 | * while we are still reading) - jhs | |
1766 | */ | |
1767 | spin_lock_bh(&x->lock); | |
1768 | c.data.aevent = p->flags; | |
1769 | c.seq = nlh->nlmsg_seq; | |
1770 | c.pid = nlh->nlmsg_pid; | |
1771 | ||
1772 | if (build_aevent(r_skb, x, &c) < 0) | |
1773 | BUG(); | |
a6483b79 | 1774 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1775 | spin_unlock_bh(&x->lock); |
1776 | xfrm_state_put(x); | |
1777 | return err; | |
1778 | } | |
1779 | ||
22e70050 | 1780 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1781 | struct nlattr **attrs) |
d51d081d | 1782 | { |
fc34acd3 | 1783 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1784 | struct xfrm_state *x; |
1785 | struct km_event c; | |
1786 | int err = - EINVAL; | |
6f26b61e JHS |
1787 | u32 mark = 0; |
1788 | struct xfrm_mark m; | |
7b67c857 | 1789 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1790 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1791 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1792 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1793 | |
d8647b79 | 1794 | if (!lt && !rp && !re) |
d51d081d JHS |
1795 | return err; |
1796 | ||
1797 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1798 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1799 | return err; | |
1800 | ||
6f26b61e JHS |
1801 | mark = xfrm_mark_get(attrs, &m); |
1802 | ||
1803 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1804 | if (x == NULL) |
1805 | return -ESRCH; | |
1806 | ||
1807 | if (x->km.state != XFRM_STATE_VALID) | |
1808 | goto out; | |
1809 | ||
e2b19125 SK |
1810 | err = xfrm_replay_verify_len(x->replay_esn, rp); |
1811 | if (err) | |
1812 | goto out; | |
1813 | ||
d51d081d | 1814 | spin_lock_bh(&x->lock); |
35a7aa08 | 1815 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1816 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1817 | |
1818 | c.event = nlh->nlmsg_type; | |
1819 | c.seq = nlh->nlmsg_seq; | |
1820 | c.pid = nlh->nlmsg_pid; | |
1821 | c.data.aevent = XFRM_AE_CU; | |
1822 | km_state_notify(x, &c); | |
1823 | err = 0; | |
1824 | out: | |
1825 | xfrm_state_put(x); | |
1826 | return err; | |
1827 | } | |
1828 | ||
22e70050 | 1829 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1830 | struct nlattr **attrs) |
1da177e4 | 1831 | { |
fc34acd3 | 1832 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1833 | struct km_event c; |
b798a9ed | 1834 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1835 | int err; |
161a09e7 | 1836 | struct xfrm_audit audit_info; |
f7b6983f | 1837 | |
35a7aa08 | 1838 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1839 | if (err) |
1840 | return err; | |
26b15dad | 1841 | |
c53fa1ed PM |
1842 | audit_info.loginuid = audit_get_loginuid(current); |
1843 | audit_info.sessionid = audit_get_sessionid(current); | |
1844 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1845 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1846 | if (err) { |
1847 | if (err == -ESRCH) /* empty table */ | |
1848 | return 0; | |
069c474e | 1849 | return err; |
2f1eb65f JHS |
1850 | } |
1851 | ||
f7b6983f | 1852 | c.data.type = type; |
f60f6b8f | 1853 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1854 | c.seq = nlh->nlmsg_seq; |
1855 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1856 | c.net = net; |
26b15dad | 1857 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1858 | return 0; |
1859 | } | |
1860 | ||
22e70050 | 1861 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1862 | struct nlattr **attrs) |
6c5c8ca7 | 1863 | { |
fc34acd3 | 1864 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1865 | struct xfrm_policy *xp; |
7b67c857 | 1866 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1867 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1868 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1869 | int err = -ENOENT; |
295fae56 JHS |
1870 | struct xfrm_mark m; |
1871 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1872 | |
35a7aa08 | 1873 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1874 | if (err) |
1875 | return err; | |
1876 | ||
c8bf4d04 TT |
1877 | err = verify_policy_dir(p->dir); |
1878 | if (err) | |
1879 | return err; | |
1880 | ||
6c5c8ca7 | 1881 | if (p->index) |
295fae56 | 1882 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1883 | else { |
5424f32e | 1884 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1885 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1886 | |
35a7aa08 | 1887 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1888 | if (err) |
1889 | return err; | |
1890 | ||
2c8dd116 | 1891 | ctx = NULL; |
6c5c8ca7 | 1892 | if (rt) { |
5424f32e | 1893 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1894 | |
03e1ad7b PM |
1895 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1896 | if (err) | |
6c5c8ca7 | 1897 | return err; |
2c8dd116 | 1898 | } |
295fae56 | 1899 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1900 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1901 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1902 | } |
6c5c8ca7 | 1903 | if (xp == NULL) |
ef41aaa0 | 1904 | return -ENOENT; |
03e1ad7b | 1905 | |
ea2dea9d | 1906 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1907 | goto out; |
6c5c8ca7 | 1908 | |
6c5c8ca7 JHS |
1909 | err = 0; |
1910 | if (up->hard) { | |
c53fa1ed PM |
1911 | uid_t loginuid = audit_get_loginuid(current); |
1912 | u32 sessionid = audit_get_sessionid(current); | |
1913 | u32 sid; | |
1914 | ||
1915 | security_task_getsecid(current, &sid); | |
6c5c8ca7 | 1916 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1917 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1918 | |
6c5c8ca7 JHS |
1919 | } else { |
1920 | // reset the timers here? | |
62db5cfd | 1921 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 JHS |
1922 | } |
1923 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1924 | ||
1925 | out: | |
1926 | xfrm_pol_put(xp); | |
1927 | return err; | |
1928 | } | |
1929 | ||
22e70050 | 1930 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1931 | struct nlattr **attrs) |
53bc6b4d | 1932 | { |
fc34acd3 | 1933 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1934 | struct xfrm_state *x; |
1935 | int err; | |
7b67c857 | 1936 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1937 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 1938 | struct xfrm_mark m; |
928497f0 | 1939 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 1940 | |
6f26b61e | 1941 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1942 | |
3a765aa5 | 1943 | err = -ENOENT; |
53bc6b4d JHS |
1944 | if (x == NULL) |
1945 | return err; | |
1946 | ||
53bc6b4d | 1947 | spin_lock_bh(&x->lock); |
3a765aa5 | 1948 | err = -EINVAL; |
53bc6b4d JHS |
1949 | if (x->km.state != XFRM_STATE_VALID) |
1950 | goto out; | |
1951 | km_state_expired(x, ue->hard, current->pid); | |
1952 | ||
161a09e7 | 1953 | if (ue->hard) { |
c53fa1ed PM |
1954 | uid_t loginuid = audit_get_loginuid(current); |
1955 | u32 sessionid = audit_get_sessionid(current); | |
1956 | u32 sid; | |
1957 | ||
1958 | security_task_getsecid(current, &sid); | |
53bc6b4d | 1959 | __xfrm_state_delete(x); |
2532386f | 1960 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1961 | } |
3a765aa5 | 1962 | err = 0; |
53bc6b4d JHS |
1963 | out: |
1964 | spin_unlock_bh(&x->lock); | |
1965 | xfrm_state_put(x); | |
1966 | return err; | |
1967 | } | |
1968 | ||
22e70050 | 1969 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1970 | struct nlattr **attrs) |
980ebd25 | 1971 | { |
fc34acd3 | 1972 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1973 | struct xfrm_policy *xp; |
1974 | struct xfrm_user_tmpl *ut; | |
1975 | int i; | |
5424f32e | 1976 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 1977 | struct xfrm_mark mark; |
980ebd25 | 1978 | |
7b67c857 | 1979 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1980 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1981 | int err = -ENOMEM; |
1982 | ||
1983 | if (!x) | |
d8eb9307 | 1984 | goto nomem; |
980ebd25 | 1985 | |
6f26b61e JHS |
1986 | xfrm_mark_get(attrs, &mark); |
1987 | ||
980ebd25 | 1988 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
1989 | if (err) |
1990 | goto bad_policy; | |
980ebd25 JHS |
1991 | |
1992 | /* build an XP */ | |
fc34acd3 | 1993 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
1994 | if (!xp) |
1995 | goto free_state; | |
980ebd25 JHS |
1996 | |
1997 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1998 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1999 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2000 | xp->mark.m = x->mark.m = mark.m; |
2001 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2002 | ut = nla_data(rt); |
980ebd25 JHS |
2003 | /* extract the templates and for each call km_key */ |
2004 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2005 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2006 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2007 | x->props.mode = t->mode; | |
2008 | x->props.reqid = t->reqid; | |
2009 | x->props.family = ut->family; | |
2010 | t->aalgos = ua->aalgos; | |
2011 | t->ealgos = ua->ealgos; | |
2012 | t->calgos = ua->calgos; | |
2013 | err = km_query(x, t, xp); | |
2014 | ||
2015 | } | |
2016 | ||
2017 | kfree(x); | |
2018 | kfree(xp); | |
2019 | ||
2020 | return 0; | |
d8eb9307 IJ |
2021 | |
2022 | bad_policy: | |
62db5cfd | 2023 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2024 | free_state: |
2025 | kfree(x); | |
2026 | nomem: | |
2027 | return err; | |
980ebd25 JHS |
2028 | } |
2029 | ||
5c79de6e | 2030 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2031 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2032 | struct xfrm_kmaddress *k, |
5424f32e | 2033 | struct nlattr **attrs, int *num) |
5c79de6e | 2034 | { |
5424f32e | 2035 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2036 | struct xfrm_user_migrate *um; |
2037 | int i, num_migrate; | |
2038 | ||
13c1d189 AE |
2039 | if (k != NULL) { |
2040 | struct xfrm_user_kmaddress *uk; | |
2041 | ||
2042 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2043 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2044 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2045 | k->family = uk->family; | |
2046 | k->reserved = uk->reserved; | |
2047 | } | |
2048 | ||
5424f32e TG |
2049 | um = nla_data(rt); |
2050 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2051 | |
2052 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2053 | return -EINVAL; | |
2054 | ||
2055 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2056 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2057 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2058 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2059 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2060 | ||
2061 | ma->proto = um->proto; | |
2062 | ma->mode = um->mode; | |
2063 | ma->reqid = um->reqid; | |
2064 | ||
2065 | ma->old_family = um->old_family; | |
2066 | ma->new_family = um->new_family; | |
2067 | } | |
2068 | ||
2069 | *num = i; | |
2070 | return 0; | |
2071 | } | |
2072 | ||
2073 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2074 | struct nlattr **attrs) |
5c79de6e | 2075 | { |
7b67c857 | 2076 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2077 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2078 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2079 | u8 type; |
2080 | int err; | |
2081 | int n = 0; | |
2082 | ||
35a7aa08 | 2083 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2084 | return -EINVAL; |
5c79de6e | 2085 | |
13c1d189 AE |
2086 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2087 | ||
5424f32e | 2088 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2089 | if (err) |
2090 | return err; | |
2091 | ||
13c1d189 | 2092 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2093 | if (err) |
2094 | return err; | |
2095 | ||
2096 | if (!n) | |
2097 | return 0; | |
2098 | ||
13c1d189 | 2099 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
2100 | |
2101 | return 0; | |
2102 | } | |
2103 | #else | |
2104 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2105 | struct nlattr **attrs) |
5c79de6e SS |
2106 | { |
2107 | return -ENOPROTOOPT; | |
2108 | } | |
2109 | #endif | |
2110 | ||
2111 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2112 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2113 | { |
2114 | struct xfrm_user_migrate um; | |
2115 | ||
2116 | memset(&um, 0, sizeof(um)); | |
2117 | um.proto = m->proto; | |
2118 | um.mode = m->mode; | |
2119 | um.reqid = m->reqid; | |
2120 | um.old_family = m->old_family; | |
2121 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2122 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2123 | um.new_family = m->new_family; | |
2124 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2125 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2126 | ||
c0144bea | 2127 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2128 | } |
2129 | ||
183cad12 | 2130 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2131 | { |
2132 | struct xfrm_user_kmaddress uk; | |
2133 | ||
2134 | memset(&uk, 0, sizeof(uk)); | |
2135 | uk.family = k->family; | |
2136 | uk.reserved = k->reserved; | |
2137 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2138 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2139 | |
2140 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2141 | } | |
2142 | ||
2143 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2144 | { |
2145 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2146 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2147 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2148 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2149 | } |
2150 | ||
183cad12 DM |
2151 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2152 | int num_migrate, const struct xfrm_kmaddress *k, | |
2153 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2154 | { |
183cad12 | 2155 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2156 | struct xfrm_userpolicy_id *pol_id; |
2157 | struct nlmsghdr *nlh; | |
5c79de6e SS |
2158 | int i; |
2159 | ||
79b8b7f4 TG |
2160 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2161 | if (nlh == NULL) | |
2162 | return -EMSGSIZE; | |
5c79de6e | 2163 | |
7b67c857 | 2164 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2165 | /* copy data from selector, dir, and type to the pol_id */ |
2166 | memset(pol_id, 0, sizeof(*pol_id)); | |
2167 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2168 | pol_id->dir = dir; | |
2169 | ||
13c1d189 AE |
2170 | if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) |
2171 | goto nlmsg_failure; | |
2172 | ||
5c79de6e SS |
2173 | if (copy_to_user_policy_type(type, skb) < 0) |
2174 | goto nlmsg_failure; | |
2175 | ||
2176 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
2177 | if (copy_to_user_migrate(mp, skb) < 0) | |
2178 | goto nlmsg_failure; | |
2179 | } | |
2180 | ||
9825069d | 2181 | return nlmsg_end(skb, nlh); |
5c79de6e | 2182 | nlmsg_failure: |
9825069d TG |
2183 | nlmsg_cancel(skb, nlh); |
2184 | return -EMSGSIZE; | |
5c79de6e SS |
2185 | } |
2186 | ||
183cad12 DM |
2187 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2188 | const struct xfrm_migrate *m, int num_migrate, | |
2189 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2190 | { |
a6483b79 | 2191 | struct net *net = &init_net; |
5c79de6e | 2192 | struct sk_buff *skb; |
5c79de6e | 2193 | |
13c1d189 | 2194 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2195 | if (skb == NULL) |
2196 | return -ENOMEM; | |
2197 | ||
2198 | /* build migrate */ | |
13c1d189 | 2199 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2200 | BUG(); |
2201 | ||
a6483b79 | 2202 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2203 | } |
2204 | #else | |
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 SS |
2208 | { |
2209 | return -ENOPROTOOPT; | |
2210 | } | |
2211 | #endif | |
d51d081d | 2212 | |
a7bd9a45 | 2213 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2214 | |
2215 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2216 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2217 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2218 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2219 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2220 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2221 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2222 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2223 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2224 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2225 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2226 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2227 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2228 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2229 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2230 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2231 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2232 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2233 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2234 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2235 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2236 | }; |
2237 | ||
492b558b TG |
2238 | #undef XMSGSIZE |
2239 | ||
cf5cb79f | 2240 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2241 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2242 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2243 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2244 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2245 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2246 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2247 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2248 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2249 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2250 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2251 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2252 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2253 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2254 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2255 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2256 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2257 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2258 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2259 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2260 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2261 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2262 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2263 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
cf5cb79f TG |
2264 | }; |
2265 | ||
1da177e4 | 2266 | static struct xfrm_link { |
5424f32e | 2267 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2268 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2269 | int (*done)(struct netlink_callback *); |
492b558b TG |
2270 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2271 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2272 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2273 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2274 | .dump = xfrm_dump_sa, |
2275 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2276 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2277 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2278 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2279 | .dump = xfrm_dump_policy, |
2280 | .done = xfrm_dump_policy_done }, | |
492b558b | 2281 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2282 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2283 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2284 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2285 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2286 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2287 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2288 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2289 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2290 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2291 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2292 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2293 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2294 | }; |
2295 | ||
1d00a4eb | 2296 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2297 | { |
a6483b79 | 2298 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2299 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2300 | struct xfrm_link *link; |
a7bd9a45 | 2301 | int type, err; |
1da177e4 | 2302 | |
1da177e4 | 2303 | type = nlh->nlmsg_type; |
1da177e4 | 2304 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2305 | return -EINVAL; |
1da177e4 LT |
2306 | |
2307 | type -= XFRM_MSG_BASE; | |
2308 | link = &xfrm_dispatch[type]; | |
2309 | ||
2310 | /* All operations require privileges, even GET */ | |
fd778461 | 2311 | if (!capable(CAP_NET_ADMIN)) |
1d00a4eb | 2312 | return -EPERM; |
1da177e4 | 2313 | |
492b558b TG |
2314 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2315 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2316 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2317 | if (link->dump == NULL) |
1d00a4eb | 2318 | return -EINVAL; |
88fc2c84 | 2319 | |
80d326fa PNA |
2320 | { |
2321 | struct netlink_dump_control c = { | |
2322 | .dump = link->dump, | |
2323 | .done = link->done, | |
2324 | }; | |
2325 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2326 | } | |
1da177e4 LT |
2327 | } |
2328 | ||
35a7aa08 | 2329 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2330 | xfrma_policy); |
a7bd9a45 TG |
2331 | if (err < 0) |
2332 | return err; | |
1da177e4 LT |
2333 | |
2334 | if (link->doit == NULL) | |
1d00a4eb | 2335 | return -EINVAL; |
1da177e4 | 2336 | |
5424f32e | 2337 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2338 | } |
2339 | ||
cd40b7d3 | 2340 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2341 | { |
cd40b7d3 DL |
2342 | mutex_lock(&xfrm_cfg_mutex); |
2343 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2344 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2345 | } |
2346 | ||
7deb2264 TG |
2347 | static inline size_t xfrm_expire_msgsize(void) |
2348 | { | |
6f26b61e JHS |
2349 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2350 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2351 | } |
2352 | ||
214e005b | 2353 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2354 | { |
2355 | struct xfrm_user_expire *ue; | |
2356 | struct nlmsghdr *nlh; | |
1da177e4 | 2357 | |
79b8b7f4 TG |
2358 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2359 | if (nlh == NULL) | |
2360 | return -EMSGSIZE; | |
1da177e4 | 2361 | |
7b67c857 | 2362 | ue = nlmsg_data(nlh); |
1da177e4 | 2363 | copy_to_user_state(x, &ue->state); |
d51d081d | 2364 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2365 | |
6f26b61e JHS |
2366 | if (xfrm_mark_put(skb, &x->mark)) |
2367 | goto nla_put_failure; | |
2368 | ||
9825069d | 2369 | return nlmsg_end(skb, nlh); |
6f26b61e JHS |
2370 | |
2371 | nla_put_failure: | |
2372 | return -EMSGSIZE; | |
1da177e4 LT |
2373 | } |
2374 | ||
214e005b | 2375 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2376 | { |
fc34acd3 | 2377 | struct net *net = xs_net(x); |
1da177e4 LT |
2378 | struct sk_buff *skb; |
2379 | ||
7deb2264 | 2380 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2381 | if (skb == NULL) |
2382 | return -ENOMEM; | |
2383 | ||
6f26b61e JHS |
2384 | if (build_expire(skb, x, c) < 0) { |
2385 | kfree_skb(skb); | |
2386 | return -EMSGSIZE; | |
2387 | } | |
1da177e4 | 2388 | |
a6483b79 | 2389 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2390 | } |
2391 | ||
214e005b | 2392 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2393 | { |
fc34acd3 | 2394 | struct net *net = xs_net(x); |
d51d081d | 2395 | struct sk_buff *skb; |
d51d081d | 2396 | |
d8647b79 | 2397 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2398 | if (skb == NULL) |
2399 | return -ENOMEM; | |
2400 | ||
2401 | if (build_aevent(skb, x, c) < 0) | |
2402 | BUG(); | |
2403 | ||
a6483b79 | 2404 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2405 | } |
2406 | ||
214e005b | 2407 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2408 | { |
7067802e | 2409 | struct net *net = c->net; |
26b15dad JHS |
2410 | struct xfrm_usersa_flush *p; |
2411 | struct nlmsghdr *nlh; | |
2412 | struct sk_buff *skb; | |
7deb2264 | 2413 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2414 | |
7deb2264 | 2415 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2416 | if (skb == NULL) |
2417 | return -ENOMEM; | |
26b15dad | 2418 | |
79b8b7f4 TG |
2419 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2420 | if (nlh == NULL) { | |
2421 | kfree_skb(skb); | |
2422 | return -EMSGSIZE; | |
2423 | } | |
26b15dad | 2424 | |
7b67c857 | 2425 | p = nlmsg_data(nlh); |
bf08867f | 2426 | p->proto = c->data.proto; |
26b15dad | 2427 | |
9825069d | 2428 | nlmsg_end(skb, nlh); |
26b15dad | 2429 | |
a6483b79 | 2430 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2431 | } |
2432 | ||
7deb2264 | 2433 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2434 | { |
7deb2264 | 2435 | size_t l = 0; |
1a6509d9 HX |
2436 | if (x->aead) |
2437 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2438 | if (x->aalg) { |
2439 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2440 | (x->aalg->alg_key_len + 7) / 8); | |
2441 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2442 | } | |
26b15dad | 2443 | if (x->ealg) |
0f99be0d | 2444 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2445 | if (x->calg) |
7deb2264 | 2446 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2447 | if (x->encap) |
7deb2264 | 2448 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2449 | if (x->tfcpad) |
2450 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2451 | if (x->replay_esn) |
2452 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
68325d3b HX |
2453 | if (x->security) |
2454 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2455 | x->security->ctx_len); | |
2456 | if (x->coaddr) | |
2457 | l += nla_total_size(sizeof(*x->coaddr)); | |
2458 | ||
d26f3984 HX |
2459 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2460 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2461 | |
2462 | return l; | |
2463 | } | |
2464 | ||
214e005b | 2465 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2466 | { |
fc34acd3 | 2467 | struct net *net = xs_net(x); |
26b15dad | 2468 | struct xfrm_usersa_info *p; |
0603eac0 | 2469 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2470 | struct nlmsghdr *nlh; |
2471 | struct sk_buff *skb; | |
26b15dad | 2472 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2473 | int headlen; |
2474 | ||
2475 | headlen = sizeof(*p); | |
2476 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2477 | len += nla_total_size(headlen); |
0603eac0 | 2478 | headlen = sizeof(*id); |
6f26b61e | 2479 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2480 | } |
7deb2264 | 2481 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2482 | |
7deb2264 | 2483 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2484 | if (skb == NULL) |
2485 | return -ENOMEM; | |
26b15dad | 2486 | |
79b8b7f4 TG |
2487 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2488 | if (nlh == NULL) | |
c0144bea | 2489 | goto nla_put_failure; |
26b15dad | 2490 | |
7b67c857 | 2491 | p = nlmsg_data(nlh); |
0603eac0 | 2492 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2493 | struct nlattr *attr; |
2494 | ||
7b67c857 | 2495 | id = nlmsg_data(nlh); |
0603eac0 HX |
2496 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2497 | id->spi = x->id.spi; | |
2498 | id->family = x->props.family; | |
2499 | id->proto = x->id.proto; | |
2500 | ||
c0144bea TG |
2501 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2502 | if (attr == NULL) | |
2503 | goto nla_put_failure; | |
2504 | ||
2505 | p = nla_data(attr); | |
0603eac0 HX |
2506 | } |
2507 | ||
68325d3b HX |
2508 | if (copy_to_user_state_extra(x, p, skb)) |
2509 | goto nla_put_failure; | |
26b15dad | 2510 | |
9825069d | 2511 | nlmsg_end(skb, nlh); |
26b15dad | 2512 | |
a6483b79 | 2513 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2514 | |
c0144bea | 2515 | nla_put_failure: |
68325d3b HX |
2516 | /* Somebody screwed up with xfrm_sa_len! */ |
2517 | WARN_ON(1); | |
26b15dad JHS |
2518 | kfree_skb(skb); |
2519 | return -1; | |
2520 | } | |
2521 | ||
214e005b | 2522 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2523 | { |
2524 | ||
2525 | switch (c->event) { | |
f60f6b8f | 2526 | case XFRM_MSG_EXPIRE: |
26b15dad | 2527 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2528 | case XFRM_MSG_NEWAE: |
2529 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2530 | case XFRM_MSG_DELSA: |
2531 | case XFRM_MSG_UPDSA: | |
2532 | case XFRM_MSG_NEWSA: | |
26b15dad | 2533 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2534 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2535 | return xfrm_notify_sa_flush(c); |
2536 | default: | |
62db5cfd | 2537 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2538 | c->event); | |
2539 | break; | |
26b15dad JHS |
2540 | } |
2541 | ||
2542 | return 0; | |
2543 | ||
2544 | } | |
2545 | ||
7deb2264 TG |
2546 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2547 | struct xfrm_policy *xp) | |
2548 | { | |
2549 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2550 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2551 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2552 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2553 | + userpolicy_type_attrsize(); | |
2554 | } | |
2555 | ||
1da177e4 LT |
2556 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2557 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2558 | int dir) | |
2559 | { | |
2560 | struct xfrm_user_acquire *ua; | |
2561 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2562 | __u32 seq = xfrm_get_acqseq(); |
2563 | ||
79b8b7f4 TG |
2564 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2565 | if (nlh == NULL) | |
2566 | return -EMSGSIZE; | |
1da177e4 | 2567 | |
7b67c857 | 2568 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2569 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2570 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2571 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2572 | copy_to_user_policy(xp, &ua->policy, dir); | |
2573 | ua->aalgos = xt->aalgos; | |
2574 | ua->ealgos = xt->ealgos; | |
2575 | ua->calgos = xt->calgos; | |
2576 | ua->seq = x->km.seq = seq; | |
2577 | ||
2578 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2579 | goto nlmsg_failure; | |
0d681623 | 2580 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2581 | goto nlmsg_failure; |
1459bb36 | 2582 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2583 | goto nlmsg_failure; |
295fae56 JHS |
2584 | if (xfrm_mark_put(skb, &xp->mark)) |
2585 | goto nla_put_failure; | |
1da177e4 | 2586 | |
9825069d | 2587 | return nlmsg_end(skb, nlh); |
1da177e4 | 2588 | |
295fae56 | 2589 | nla_put_failure: |
1da177e4 | 2590 | nlmsg_failure: |
9825069d TG |
2591 | nlmsg_cancel(skb, nlh); |
2592 | return -EMSGSIZE; | |
1da177e4 LT |
2593 | } |
2594 | ||
2595 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2596 | struct xfrm_policy *xp, int dir) | |
2597 | { | |
a6483b79 | 2598 | struct net *net = xs_net(x); |
1da177e4 | 2599 | struct sk_buff *skb; |
1da177e4 | 2600 | |
7deb2264 | 2601 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2602 | if (skb == NULL) |
2603 | return -ENOMEM; | |
2604 | ||
2605 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2606 | BUG(); | |
2607 | ||
a6483b79 | 2608 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2609 | } |
2610 | ||
2611 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2612 | * or more templates. | |
2613 | */ | |
cb969f07 | 2614 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2615 | u8 *data, int len, int *dir) |
2616 | { | |
fc34acd3 | 2617 | struct net *net = sock_net(sk); |
1da177e4 LT |
2618 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2619 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2620 | struct xfrm_policy *xp; | |
2621 | int nr; | |
2622 | ||
cb969f07 | 2623 | switch (sk->sk_family) { |
1da177e4 LT |
2624 | case AF_INET: |
2625 | if (opt != IP_XFRM_POLICY) { | |
2626 | *dir = -EOPNOTSUPP; | |
2627 | return NULL; | |
2628 | } | |
2629 | break; | |
dfd56b8b | 2630 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2631 | case AF_INET6: |
2632 | if (opt != IPV6_XFRM_POLICY) { | |
2633 | *dir = -EOPNOTSUPP; | |
2634 | return NULL; | |
2635 | } | |
2636 | break; | |
2637 | #endif | |
2638 | default: | |
2639 | *dir = -EINVAL; | |
2640 | return NULL; | |
2641 | } | |
2642 | ||
2643 | *dir = -EINVAL; | |
2644 | ||
2645 | if (len < sizeof(*p) || | |
2646 | verify_newpolicy_info(p)) | |
2647 | return NULL; | |
2648 | ||
2649 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2650 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2651 | return NULL; |
2652 | ||
a4f1bac6 HX |
2653 | if (p->dir > XFRM_POLICY_OUT) |
2654 | return NULL; | |
2655 | ||
2f09a4d5 | 2656 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2657 | if (xp == NULL) { |
2658 | *dir = -ENOBUFS; | |
2659 | return NULL; | |
2660 | } | |
2661 | ||
2662 | copy_from_user_policy(xp, p); | |
f7b6983f | 2663 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2664 | copy_templates(xp, ut, nr); |
2665 | ||
2666 | *dir = p->dir; | |
2667 | ||
2668 | return xp; | |
2669 | } | |
2670 | ||
7deb2264 TG |
2671 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2672 | { | |
2673 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2674 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2675 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2676 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2677 | + userpolicy_type_attrsize(); |
2678 | } | |
2679 | ||
1da177e4 | 2680 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2681 | int dir, const struct km_event *c) |
1da177e4 LT |
2682 | { |
2683 | struct xfrm_user_polexpire *upe; | |
2684 | struct nlmsghdr *nlh; | |
d51d081d | 2685 | int hard = c->data.hard; |
1da177e4 | 2686 | |
79b8b7f4 TG |
2687 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2688 | if (nlh == NULL) | |
2689 | return -EMSGSIZE; | |
1da177e4 | 2690 | |
7b67c857 | 2691 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2692 | copy_to_user_policy(xp, &upe->pol, dir); |
2693 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2694 | goto nlmsg_failure; | |
df71837d TJ |
2695 | if (copy_to_user_sec_ctx(xp, skb)) |
2696 | goto nlmsg_failure; | |
1459bb36 | 2697 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2698 | goto nlmsg_failure; |
295fae56 JHS |
2699 | if (xfrm_mark_put(skb, &xp->mark)) |
2700 | goto nla_put_failure; | |
1da177e4 LT |
2701 | upe->hard = !!hard; |
2702 | ||
9825069d | 2703 | return nlmsg_end(skb, nlh); |
1da177e4 | 2704 | |
295fae56 | 2705 | nla_put_failure: |
1da177e4 | 2706 | nlmsg_failure: |
9825069d TG |
2707 | nlmsg_cancel(skb, nlh); |
2708 | return -EMSGSIZE; | |
1da177e4 LT |
2709 | } |
2710 | ||
214e005b | 2711 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2712 | { |
fc34acd3 | 2713 | struct net *net = xp_net(xp); |
1da177e4 | 2714 | struct sk_buff *skb; |
1da177e4 | 2715 | |
7deb2264 | 2716 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2717 | if (skb == NULL) |
2718 | return -ENOMEM; | |
2719 | ||
d51d081d | 2720 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2721 | BUG(); |
2722 | ||
a6483b79 | 2723 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2724 | } |
2725 | ||
214e005b | 2726 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2727 | { |
fc34acd3 | 2728 | struct net *net = xp_net(xp); |
26b15dad | 2729 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2730 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2731 | struct nlmsghdr *nlh; |
2732 | struct sk_buff *skb; | |
7deb2264 | 2733 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2734 | int headlen; |
2735 | ||
2736 | headlen = sizeof(*p); | |
2737 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2738 | len += nla_total_size(headlen); |
0603eac0 HX |
2739 | headlen = sizeof(*id); |
2740 | } | |
cfbfd45a | 2741 | len += userpolicy_type_attrsize(); |
295fae56 | 2742 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2743 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2744 | |
7deb2264 | 2745 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2746 | if (skb == NULL) |
2747 | return -ENOMEM; | |
26b15dad | 2748 | |
79b8b7f4 TG |
2749 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2750 | if (nlh == NULL) | |
2751 | goto nlmsg_failure; | |
26b15dad | 2752 | |
7b67c857 | 2753 | p = nlmsg_data(nlh); |
0603eac0 | 2754 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2755 | struct nlattr *attr; |
2756 | ||
7b67c857 | 2757 | id = nlmsg_data(nlh); |
0603eac0 HX |
2758 | memset(id, 0, sizeof(*id)); |
2759 | id->dir = dir; | |
2760 | if (c->data.byid) | |
2761 | id->index = xp->index; | |
2762 | else | |
2763 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2764 | ||
c0144bea TG |
2765 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2766 | if (attr == NULL) | |
2767 | goto nlmsg_failure; | |
2768 | ||
2769 | p = nla_data(attr); | |
0603eac0 | 2770 | } |
26b15dad | 2771 | |
26b15dad JHS |
2772 | copy_to_user_policy(xp, p, dir); |
2773 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2774 | goto nlmsg_failure; | |
1459bb36 | 2775 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2776 | goto nlmsg_failure; |
26b15dad | 2777 | |
295fae56 JHS |
2778 | if (xfrm_mark_put(skb, &xp->mark)) |
2779 | goto nla_put_failure; | |
2780 | ||
9825069d | 2781 | nlmsg_end(skb, nlh); |
26b15dad | 2782 | |
a6483b79 | 2783 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2784 | |
295fae56 | 2785 | nla_put_failure: |
26b15dad JHS |
2786 | nlmsg_failure: |
2787 | kfree_skb(skb); | |
2788 | return -1; | |
2789 | } | |
2790 | ||
214e005b | 2791 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2792 | { |
7067802e | 2793 | struct net *net = c->net; |
26b15dad JHS |
2794 | struct nlmsghdr *nlh; |
2795 | struct sk_buff *skb; | |
26b15dad | 2796 | |
7deb2264 | 2797 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2798 | if (skb == NULL) |
2799 | return -ENOMEM; | |
26b15dad | 2800 | |
79b8b7f4 TG |
2801 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2802 | if (nlh == NULL) | |
2803 | goto nlmsg_failure; | |
0c51f53c JHS |
2804 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2805 | goto nlmsg_failure; | |
26b15dad | 2806 | |
9825069d | 2807 | nlmsg_end(skb, nlh); |
26b15dad | 2808 | |
a6483b79 | 2809 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2810 | |
2811 | nlmsg_failure: | |
2812 | kfree_skb(skb); | |
2813 | return -1; | |
2814 | } | |
2815 | ||
214e005b | 2816 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2817 | { |
2818 | ||
2819 | switch (c->event) { | |
f60f6b8f HX |
2820 | case XFRM_MSG_NEWPOLICY: |
2821 | case XFRM_MSG_UPDPOLICY: | |
2822 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2823 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2824 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2825 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2826 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2827 | return xfrm_exp_policy_notify(xp, dir, c); |
2828 | default: | |
62db5cfd | 2829 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2830 | c->event); | |
26b15dad JHS |
2831 | } |
2832 | ||
2833 | return 0; | |
2834 | ||
2835 | } | |
2836 | ||
7deb2264 TG |
2837 | static inline size_t xfrm_report_msgsize(void) |
2838 | { | |
2839 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2840 | } | |
2841 | ||
97a64b45 MN |
2842 | static int build_report(struct sk_buff *skb, u8 proto, |
2843 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2844 | { | |
2845 | struct xfrm_user_report *ur; | |
2846 | struct nlmsghdr *nlh; | |
97a64b45 | 2847 | |
79b8b7f4 TG |
2848 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2849 | if (nlh == NULL) | |
2850 | return -EMSGSIZE; | |
97a64b45 | 2851 | |
7b67c857 | 2852 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2853 | ur->proto = proto; |
2854 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2855 | ||
d0fde795 DM |
2856 | if (addr && |
2857 | nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr)) | |
2858 | goto nla_put_failure; | |
97a64b45 | 2859 | |
9825069d | 2860 | return nlmsg_end(skb, nlh); |
97a64b45 | 2861 | |
c0144bea | 2862 | nla_put_failure: |
9825069d TG |
2863 | nlmsg_cancel(skb, nlh); |
2864 | return -EMSGSIZE; | |
97a64b45 MN |
2865 | } |
2866 | ||
db983c11 AD |
2867 | static int xfrm_send_report(struct net *net, u8 proto, |
2868 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2869 | { |
2870 | struct sk_buff *skb; | |
97a64b45 | 2871 | |
7deb2264 | 2872 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2873 | if (skb == NULL) |
2874 | return -ENOMEM; | |
2875 | ||
2876 | if (build_report(skb, proto, sel, addr) < 0) | |
2877 | BUG(); | |
2878 | ||
a6483b79 | 2879 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2880 | } |
2881 | ||
3a2dfbe8 MW |
2882 | static inline size_t xfrm_mapping_msgsize(void) |
2883 | { | |
2884 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2885 | } | |
2886 | ||
2887 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2888 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2889 | { | |
2890 | struct xfrm_user_mapping *um; | |
2891 | struct nlmsghdr *nlh; | |
2892 | ||
2893 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2894 | if (nlh == NULL) | |
2895 | return -EMSGSIZE; | |
2896 | ||
2897 | um = nlmsg_data(nlh); | |
2898 | ||
2899 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2900 | um->id.spi = x->id.spi; | |
2901 | um->id.family = x->props.family; | |
2902 | um->id.proto = x->id.proto; | |
2903 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2904 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2905 | um->new_sport = new_sport; | |
2906 | um->old_sport = x->encap->encap_sport; | |
2907 | um->reqid = x->props.reqid; | |
2908 | ||
2909 | return nlmsg_end(skb, nlh); | |
2910 | } | |
2911 | ||
2912 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2913 | __be16 sport) | |
2914 | { | |
a6483b79 | 2915 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2916 | struct sk_buff *skb; |
2917 | ||
2918 | if (x->id.proto != IPPROTO_ESP) | |
2919 | return -EINVAL; | |
2920 | ||
2921 | if (!x->encap) | |
2922 | return -EINVAL; | |
2923 | ||
2924 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2925 | if (skb == NULL) | |
2926 | return -ENOMEM; | |
2927 | ||
2928 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2929 | BUG(); | |
2930 | ||
a6483b79 | 2931 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2932 | } |
2933 | ||
1da177e4 LT |
2934 | static struct xfrm_mgr netlink_mgr = { |
2935 | .id = "netlink", | |
2936 | .notify = xfrm_send_state_notify, | |
2937 | .acquire = xfrm_send_acquire, | |
2938 | .compile_policy = xfrm_compile_policy, | |
2939 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2940 | .report = xfrm_send_report, |
5c79de6e | 2941 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2942 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2943 | }; |
2944 | ||
a6483b79 | 2945 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2946 | { |
be33690d PM |
2947 | struct sock *nlsk; |
2948 | ||
a6483b79 | 2949 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2950 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2951 | if (nlsk == NULL) |
1da177e4 | 2952 | return -ENOMEM; |
d79d792e | 2953 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 2954 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2955 | return 0; |
2956 | } | |
2957 | ||
d79d792e | 2958 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 2959 | { |
d79d792e EB |
2960 | struct net *net; |
2961 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 2962 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
2963 | synchronize_net(); |
2964 | list_for_each_entry(net, net_exit_list, exit_list) | |
2965 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
2966 | } |
2967 | ||
a6483b79 | 2968 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
2969 | .init = xfrm_user_net_init, |
2970 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
2971 | }; |
2972 | ||
2973 | static int __init xfrm_user_init(void) | |
2974 | { | |
2975 | int rv; | |
2976 | ||
2977 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
2978 | ||
2979 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
2980 | if (rv < 0) | |
2981 | return rv; | |
2982 | rv = xfrm_register_km(&netlink_mgr); | |
2983 | if (rv < 0) | |
2984 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2985 | return rv; | |
2986 | } | |
2987 | ||
2988 | static void __exit xfrm_user_exit(void) | |
2989 | { | |
2990 | xfrm_unregister_km(&netlink_mgr); | |
2991 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2992 | } | |
2993 | ||
1da177e4 LT |
2994 | module_init(xfrm_user_init); |
2995 | module_exit(xfrm_user_exit); | |
2996 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2997 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2998 |