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 | { | |
f778a636 | 692 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
693 | memcpy(&p->id, &x->id, sizeof(p->id)); |
694 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
695 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
696 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
697 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 698 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
699 | p->mode = x->props.mode; |
700 | p->replay_window = x->props.replay_window; | |
701 | p->reqid = x->props.reqid; | |
702 | p->family = x->props.family; | |
703 | p->flags = x->props.flags; | |
704 | p->seq = x->km.seq; | |
705 | } | |
706 | ||
707 | struct xfrm_dump_info { | |
708 | struct sk_buff *in_skb; | |
709 | struct sk_buff *out_skb; | |
710 | u32 nlmsg_seq; | |
711 | u16 nlmsg_flags; | |
1da177e4 LT |
712 | }; |
713 | ||
c0144bea TG |
714 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
715 | { | |
c0144bea TG |
716 | struct xfrm_user_sec_ctx *uctx; |
717 | struct nlattr *attr; | |
68325d3b | 718 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
719 | |
720 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
721 | if (attr == NULL) | |
722 | return -EMSGSIZE; | |
723 | ||
724 | uctx = nla_data(attr); | |
725 | uctx->exttype = XFRMA_SEC_CTX; | |
726 | uctx->len = ctx_size; | |
727 | uctx->ctx_doi = s->ctx_doi; | |
728 | uctx->ctx_alg = s->ctx_alg; | |
729 | uctx->ctx_len = s->ctx_len; | |
730 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
4447bb33 MW |
735 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
736 | { | |
737 | struct xfrm_algo *algo; | |
738 | struct nlattr *nla; | |
739 | ||
740 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
741 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
742 | if (!nla) | |
743 | return -EMSGSIZE; | |
744 | ||
745 | algo = nla_data(nla); | |
4c87308b | 746 | strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); |
4447bb33 MW |
747 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
748 | algo->alg_key_len = auth->alg_key_len; | |
749 | ||
750 | return 0; | |
751 | } | |
752 | ||
68325d3b HX |
753 | /* Don't change this without updating xfrm_sa_len! */ |
754 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
755 | struct xfrm_usersa_info *p, | |
756 | struct sk_buff *skb) | |
1da177e4 | 757 | { |
1d1e34dd | 758 | int ret = 0; |
d0fde795 | 759 | |
1d1e34dd | 760 | copy_to_user_state(x, p); |
68325d3b | 761 | |
1d1e34dd DM |
762 | if (x->coaddr) { |
763 | ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
764 | if (ret) | |
765 | goto out; | |
766 | } | |
767 | if (x->lastused) { | |
768 | ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused); | |
769 | if (ret) | |
770 | goto out; | |
771 | } | |
772 | if (x->aead) { | |
773 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
774 | if (ret) | |
775 | goto out; | |
776 | } | |
777 | if (x->aalg) { | |
778 | ret = copy_to_user_auth(x->aalg, skb); | |
779 | if (!ret) | |
780 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
781 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
782 | if (ret) | |
783 | goto out; | |
784 | } | |
785 | if (x->ealg) { | |
786 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); | |
787 | if (ret) | |
788 | goto out; | |
789 | } | |
790 | if (x->calg) { | |
791 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
792 | if (ret) | |
793 | goto out; | |
794 | } | |
795 | if (x->encap) { | |
796 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
797 | if (ret) | |
798 | goto out; | |
799 | } | |
800 | if (x->tfcpad) { | |
801 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); | |
802 | if (ret) | |
803 | goto out; | |
804 | } | |
805 | ret = xfrm_mark_put(skb, &x->mark); | |
806 | if (ret) | |
807 | goto out; | |
808 | if (x->replay_esn) { | |
809 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, | |
810 | xfrm_replay_state_esn_len(x->replay_esn), | |
811 | x->replay_esn); | |
812 | if (ret) | |
813 | goto out; | |
814 | } | |
815 | if (x->security) | |
816 | ret = copy_sec_ctx(x->security, skb); | |
817 | out: | |
818 | return ret; | |
68325d3b HX |
819 | } |
820 | ||
821 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
822 | { | |
823 | struct xfrm_dump_info *sp = ptr; | |
824 | struct sk_buff *in_skb = sp->in_skb; | |
825 | struct sk_buff *skb = sp->out_skb; | |
826 | struct xfrm_usersa_info *p; | |
827 | struct nlmsghdr *nlh; | |
828 | int err; | |
829 | ||
68325d3b HX |
830 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
831 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
832 | if (nlh == NULL) | |
833 | return -EMSGSIZE; | |
834 | ||
835 | p = nlmsg_data(nlh); | |
836 | ||
837 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
838 | if (err) { |
839 | nlmsg_cancel(skb, nlh); | |
840 | return err; | |
841 | } | |
9825069d | 842 | nlmsg_end(skb, nlh); |
1da177e4 | 843 | return 0; |
1da177e4 LT |
844 | } |
845 | ||
4c563f76 TT |
846 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
847 | { | |
848 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
849 | xfrm_state_walk_done(walk); | |
850 | return 0; | |
851 | } | |
852 | ||
1da177e4 LT |
853 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
854 | { | |
fc34acd3 | 855 | struct net *net = sock_net(skb->sk); |
4c563f76 | 856 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
857 | struct xfrm_dump_info info; |
858 | ||
4c563f76 TT |
859 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
860 | sizeof(cb->args) - sizeof(cb->args[0])); | |
861 | ||
1da177e4 LT |
862 | info.in_skb = cb->skb; |
863 | info.out_skb = skb; | |
864 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
865 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
866 | |
867 | if (!cb->args[0]) { | |
868 | cb->args[0] = 1; | |
869 | xfrm_state_walk_init(walk, 0); | |
870 | } | |
871 | ||
fc34acd3 | 872 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
873 | |
874 | return skb->len; | |
875 | } | |
876 | ||
877 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
878 | struct xfrm_state *x, u32 seq) | |
879 | { | |
880 | struct xfrm_dump_info info; | |
881 | struct sk_buff *skb; | |
864745d2 | 882 | int err; |
1da177e4 | 883 | |
7deb2264 | 884 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
885 | if (!skb) |
886 | return ERR_PTR(-ENOMEM); | |
887 | ||
1da177e4 LT |
888 | info.in_skb = in_skb; |
889 | info.out_skb = skb; | |
890 | info.nlmsg_seq = seq; | |
891 | info.nlmsg_flags = 0; | |
1da177e4 | 892 | |
864745d2 MK |
893 | err = dump_one_state(x, 0, &info); |
894 | if (err) { | |
1da177e4 | 895 | kfree_skb(skb); |
864745d2 | 896 | return ERR_PTR(err); |
1da177e4 LT |
897 | } |
898 | ||
899 | return skb; | |
900 | } | |
901 | ||
7deb2264 TG |
902 | static inline size_t xfrm_spdinfo_msgsize(void) |
903 | { | |
904 | return NLMSG_ALIGN(4) | |
905 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
906 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
907 | } | |
908 | ||
e071041b AD |
909 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
910 | u32 pid, u32 seq, u32 flags) | |
ecfd6b18 | 911 | { |
5a6d3416 JHS |
912 | struct xfrmk_spdinfo si; |
913 | struct xfrmu_spdinfo spc; | |
914 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 | 915 | struct nlmsghdr *nlh; |
1d1e34dd | 916 | int err; |
ecfd6b18 JHS |
917 | u32 *f; |
918 | ||
919 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
25985edc | 920 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
921 | return -EMSGSIZE; |
922 | ||
923 | f = nlmsg_data(nlh); | |
924 | *f = flags; | |
e071041b | 925 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
926 | spc.incnt = si.incnt; |
927 | spc.outcnt = si.outcnt; | |
928 | spc.fwdcnt = si.fwdcnt; | |
929 | spc.inscnt = si.inscnt; | |
930 | spc.outscnt = si.outscnt; | |
931 | spc.fwdscnt = si.fwdscnt; | |
932 | sph.spdhcnt = si.spdhcnt; | |
933 | sph.spdhmcnt = si.spdhmcnt; | |
934 | ||
1d1e34dd DM |
935 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
936 | if (!err) | |
937 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
938 | if (err) { | |
939 | nlmsg_cancel(skb, nlh); | |
940 | return err; | |
941 | } | |
ecfd6b18 JHS |
942 | |
943 | return nlmsg_end(skb, nlh); | |
ecfd6b18 JHS |
944 | } |
945 | ||
946 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 947 | struct nlattr **attrs) |
ecfd6b18 | 948 | { |
a6483b79 | 949 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 950 | struct sk_buff *r_skb; |
7b67c857 | 951 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
952 | u32 spid = NETLINK_CB(skb).pid; |
953 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 954 | |
7deb2264 | 955 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
956 | if (r_skb == NULL) |
957 | return -ENOMEM; | |
958 | ||
e071041b | 959 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
ecfd6b18 JHS |
960 | BUG(); |
961 | ||
a6483b79 | 962 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
963 | } |
964 | ||
7deb2264 TG |
965 | static inline size_t xfrm_sadinfo_msgsize(void) |
966 | { | |
967 | return NLMSG_ALIGN(4) | |
968 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
969 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
970 | } | |
971 | ||
e071041b AD |
972 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
973 | u32 pid, u32 seq, u32 flags) | |
28d8909b | 974 | { |
af11e316 JHS |
975 | struct xfrmk_sadinfo si; |
976 | struct xfrmu_sadhinfo sh; | |
28d8909b | 977 | struct nlmsghdr *nlh; |
1d1e34dd | 978 | int err; |
28d8909b JHS |
979 | u32 *f; |
980 | ||
981 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
25985edc | 982 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
983 | return -EMSGSIZE; |
984 | ||
985 | f = nlmsg_data(nlh); | |
986 | *f = flags; | |
e071041b | 987 | xfrm_sad_getinfo(net, &si); |
28d8909b | 988 | |
af11e316 JHS |
989 | sh.sadhmcnt = si.sadhmcnt; |
990 | sh.sadhcnt = si.sadhcnt; | |
991 | ||
1d1e34dd DM |
992 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
993 | if (!err) | |
994 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
995 | if (err) { | |
996 | nlmsg_cancel(skb, nlh); | |
997 | return err; | |
998 | } | |
28d8909b JHS |
999 | |
1000 | return nlmsg_end(skb, nlh); | |
28d8909b JHS |
1001 | } |
1002 | ||
1003 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1004 | struct nlattr **attrs) |
28d8909b | 1005 | { |
a6483b79 | 1006 | struct net *net = sock_net(skb->sk); |
28d8909b | 1007 | struct sk_buff *r_skb; |
7b67c857 | 1008 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
1009 | u32 spid = NETLINK_CB(skb).pid; |
1010 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 1011 | |
7deb2264 | 1012 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1013 | if (r_skb == NULL) |
1014 | return -ENOMEM; | |
1015 | ||
e071041b | 1016 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
28d8909b JHS |
1017 | BUG(); |
1018 | ||
a6483b79 | 1019 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
1020 | } |
1021 | ||
22e70050 | 1022 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1023 | struct nlattr **attrs) |
1da177e4 | 1024 | { |
fc34acd3 | 1025 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1026 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1027 | struct xfrm_state *x; |
1028 | struct sk_buff *resp_skb; | |
eb2971b6 | 1029 | int err = -ESRCH; |
1da177e4 | 1030 | |
fc34acd3 | 1031 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1032 | if (x == NULL) |
1033 | goto out_noput; | |
1034 | ||
1035 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1036 | if (IS_ERR(resp_skb)) { | |
1037 | err = PTR_ERR(resp_skb); | |
1038 | } else { | |
a6483b79 | 1039 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1040 | } |
1041 | xfrm_state_put(x); | |
1042 | out_noput: | |
1043 | return err; | |
1044 | } | |
1045 | ||
1046 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
1047 | { | |
1048 | switch (p->info.id.proto) { | |
1049 | case IPPROTO_AH: | |
1050 | case IPPROTO_ESP: | |
1051 | break; | |
1052 | ||
1053 | case IPPROTO_COMP: | |
1054 | /* IPCOMP spi is 16-bits. */ | |
1055 | if (p->max >= 0x10000) | |
1056 | return -EINVAL; | |
1057 | break; | |
1058 | ||
1059 | default: | |
1060 | return -EINVAL; | |
3ff50b79 | 1061 | } |
1da177e4 LT |
1062 | |
1063 | if (p->min > p->max) | |
1064 | return -EINVAL; | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
22e70050 | 1069 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1070 | struct nlattr **attrs) |
1da177e4 | 1071 | { |
fc34acd3 | 1072 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1073 | struct xfrm_state *x; |
1074 | struct xfrm_userspi_info *p; | |
1075 | struct sk_buff *resp_skb; | |
1076 | xfrm_address_t *daddr; | |
1077 | int family; | |
1078 | int err; | |
6f26b61e JHS |
1079 | u32 mark; |
1080 | struct xfrm_mark m; | |
1da177e4 | 1081 | |
7b67c857 | 1082 | p = nlmsg_data(nlh); |
1da177e4 LT |
1083 | err = verify_userspi_info(p); |
1084 | if (err) | |
1085 | goto out_noput; | |
1086 | ||
1087 | family = p->info.family; | |
1088 | daddr = &p->info.id.daddr; | |
1089 | ||
1090 | x = NULL; | |
6f26b61e JHS |
1091 | |
1092 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1093 | if (p->info.seq) { |
6f26b61e | 1094 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
1da177e4 LT |
1095 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
1096 | xfrm_state_put(x); | |
1097 | x = NULL; | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | if (!x) | |
6f26b61e | 1102 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1103 | p->info.id.proto, daddr, |
1104 | &p->info.saddr, 1, | |
1105 | family); | |
1106 | err = -ENOENT; | |
1107 | if (x == NULL) | |
1108 | goto out_noput; | |
1109 | ||
658b219e HX |
1110 | err = xfrm_alloc_spi(x, p->min, p->max); |
1111 | if (err) | |
1112 | goto out; | |
1da177e4 | 1113 | |
658b219e | 1114 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1115 | if (IS_ERR(resp_skb)) { |
1116 | err = PTR_ERR(resp_skb); | |
1117 | goto out; | |
1118 | } | |
1119 | ||
a6483b79 | 1120 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1121 | |
1122 | out: | |
1123 | xfrm_state_put(x); | |
1124 | out_noput: | |
1125 | return err; | |
1126 | } | |
1127 | ||
b798a9ed | 1128 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1129 | { |
1130 | switch (dir) { | |
1131 | case XFRM_POLICY_IN: | |
1132 | case XFRM_POLICY_OUT: | |
1133 | case XFRM_POLICY_FWD: | |
1134 | break; | |
1135 | ||
1136 | default: | |
1137 | return -EINVAL; | |
3ff50b79 | 1138 | } |
1da177e4 LT |
1139 | |
1140 | return 0; | |
1141 | } | |
1142 | ||
b798a9ed | 1143 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1144 | { |
1145 | switch (type) { | |
1146 | case XFRM_POLICY_TYPE_MAIN: | |
1147 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1148 | case XFRM_POLICY_TYPE_SUB: | |
1149 | #endif | |
1150 | break; | |
1151 | ||
1152 | default: | |
1153 | return -EINVAL; | |
3ff50b79 | 1154 | } |
f7b6983f MN |
1155 | |
1156 | return 0; | |
1157 | } | |
1158 | ||
1da177e4 LT |
1159 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1160 | { | |
1161 | switch (p->share) { | |
1162 | case XFRM_SHARE_ANY: | |
1163 | case XFRM_SHARE_SESSION: | |
1164 | case XFRM_SHARE_USER: | |
1165 | case XFRM_SHARE_UNIQUE: | |
1166 | break; | |
1167 | ||
1168 | default: | |
1169 | return -EINVAL; | |
3ff50b79 | 1170 | } |
1da177e4 LT |
1171 | |
1172 | switch (p->action) { | |
1173 | case XFRM_POLICY_ALLOW: | |
1174 | case XFRM_POLICY_BLOCK: | |
1175 | break; | |
1176 | ||
1177 | default: | |
1178 | return -EINVAL; | |
3ff50b79 | 1179 | } |
1da177e4 LT |
1180 | |
1181 | switch (p->sel.family) { | |
1182 | case AF_INET: | |
1183 | break; | |
1184 | ||
1185 | case AF_INET6: | |
dfd56b8b | 1186 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1187 | break; |
1188 | #else | |
1189 | return -EAFNOSUPPORT; | |
1190 | #endif | |
1191 | ||
1192 | default: | |
1193 | return -EINVAL; | |
3ff50b79 | 1194 | } |
1da177e4 LT |
1195 | |
1196 | return verify_policy_dir(p->dir); | |
1197 | } | |
1198 | ||
5424f32e | 1199 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1200 | { |
5424f32e | 1201 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1202 | struct xfrm_user_sec_ctx *uctx; |
1203 | ||
1204 | if (!rt) | |
1205 | return 0; | |
1206 | ||
5424f32e | 1207 | uctx = nla_data(rt); |
03e1ad7b | 1208 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1209 | } |
1210 | ||
1da177e4 LT |
1211 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1212 | int nr) | |
1213 | { | |
1214 | int i; | |
1215 | ||
1216 | xp->xfrm_nr = nr; | |
1217 | for (i = 0; i < nr; i++, ut++) { | |
1218 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1219 | ||
1220 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1221 | memcpy(&t->saddr, &ut->saddr, | |
1222 | sizeof(xfrm_address_t)); | |
1223 | t->reqid = ut->reqid; | |
1224 | t->mode = ut->mode; | |
1225 | t->share = ut->share; | |
1226 | t->optional = ut->optional; | |
1227 | t->aalgos = ut->aalgos; | |
1228 | t->ealgos = ut->ealgos; | |
1229 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1230 | /* If all masks are ~0, then we allow all algorithms. */ |
1231 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1232 | t->encap_family = ut->family; |
1da177e4 LT |
1233 | } |
1234 | } | |
1235 | ||
b4ad86bf DM |
1236 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1237 | { | |
1238 | int i; | |
1239 | ||
1240 | if (nr > XFRM_MAX_DEPTH) | |
1241 | return -EINVAL; | |
1242 | ||
1243 | for (i = 0; i < nr; i++) { | |
1244 | /* We never validated the ut->family value, so many | |
1245 | * applications simply leave it at zero. The check was | |
1246 | * never made and ut->family was ignored because all | |
1247 | * templates could be assumed to have the same family as | |
1248 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1249 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1250 | */ | |
1251 | if (!ut[i].family) | |
1252 | ut[i].family = family; | |
1253 | ||
1254 | switch (ut[i].family) { | |
1255 | case AF_INET: | |
1256 | break; | |
dfd56b8b | 1257 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1258 | case AF_INET6: |
1259 | break; | |
1260 | #endif | |
1261 | default: | |
1262 | return -EINVAL; | |
3ff50b79 | 1263 | } |
b4ad86bf DM |
1264 | } |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
5424f32e | 1269 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1270 | { |
5424f32e | 1271 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1272 | |
1273 | if (!rt) { | |
1274 | pol->xfrm_nr = 0; | |
1275 | } else { | |
5424f32e TG |
1276 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1277 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1278 | int err; |
1da177e4 | 1279 | |
b4ad86bf DM |
1280 | err = validate_tmpl(nr, utmpl, pol->family); |
1281 | if (err) | |
1282 | return err; | |
1da177e4 | 1283 | |
5424f32e | 1284 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1285 | } |
1286 | return 0; | |
1287 | } | |
1288 | ||
5424f32e | 1289 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1290 | { |
5424f32e | 1291 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1292 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1293 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1294 | int err; |
1295 | ||
1296 | if (rt) { | |
5424f32e | 1297 | upt = nla_data(rt); |
f7b6983f MN |
1298 | type = upt->type; |
1299 | } | |
1300 | ||
1301 | err = verify_policy_type(type); | |
1302 | if (err) | |
1303 | return err; | |
1304 | ||
1305 | *tp = type; | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1da177e4 LT |
1309 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1310 | { | |
1311 | xp->priority = p->priority; | |
1312 | xp->index = p->index; | |
1313 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1314 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1315 | xp->action = p->action; | |
1316 | xp->flags = p->flags; | |
1317 | xp->family = p->sel.family; | |
1318 | /* XXX xp->share = p->share; */ | |
1319 | } | |
1320 | ||
1321 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1322 | { | |
7b789836 | 1323 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
1324 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
1325 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1326 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1327 | p->priority = xp->priority; | |
1328 | p->index = xp->index; | |
1329 | p->sel.family = xp->family; | |
1330 | p->dir = dir; | |
1331 | p->action = xp->action; | |
1332 | p->flags = xp->flags; | |
1333 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1334 | } | |
1335 | ||
fc34acd3 | 1336 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1337 | { |
fc34acd3 | 1338 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1339 | int err; |
1340 | ||
1341 | if (!xp) { | |
1342 | *errp = -ENOMEM; | |
1343 | return NULL; | |
1344 | } | |
1345 | ||
1346 | copy_from_user_policy(xp, p); | |
df71837d | 1347 | |
35a7aa08 | 1348 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1349 | if (err) |
1350 | goto error; | |
1351 | ||
35a7aa08 TG |
1352 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1353 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1354 | if (err) |
1355 | goto error; | |
1da177e4 | 1356 | |
295fae56 JHS |
1357 | xfrm_mark_get(attrs, &xp->mark); |
1358 | ||
1da177e4 | 1359 | return xp; |
f7b6983f MN |
1360 | error: |
1361 | *errp = err; | |
12a169e7 | 1362 | xp->walk.dead = 1; |
64c31b3f | 1363 | xfrm_policy_destroy(xp); |
f7b6983f | 1364 | return NULL; |
1da177e4 LT |
1365 | } |
1366 | ||
22e70050 | 1367 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1368 | struct nlattr **attrs) |
1da177e4 | 1369 | { |
fc34acd3 | 1370 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1371 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1372 | struct xfrm_policy *xp; |
26b15dad | 1373 | struct km_event c; |
1da177e4 LT |
1374 | int err; |
1375 | int excl; | |
c53fa1ed PM |
1376 | uid_t loginuid = audit_get_loginuid(current); |
1377 | u32 sessionid = audit_get_sessionid(current); | |
1378 | u32 sid; | |
1da177e4 LT |
1379 | |
1380 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1381 | if (err) |
1382 | return err; | |
35a7aa08 | 1383 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1384 | if (err) |
1385 | return err; | |
1386 | ||
fc34acd3 | 1387 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1388 | if (!xp) |
1389 | return err; | |
1390 | ||
25985edc | 1391 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1392 | * Aha! this is anti-netlink really i.e more pfkey derived |
1393 | * in netlink excl is a flag and you wouldnt need | |
1394 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1395 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1396 | err = xfrm_policy_insert(p->dir, xp, excl); | |
c53fa1ed | 1397 | security_task_getsecid(current, &sid); |
2532386f | 1398 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1399 | |
1da177e4 | 1400 | if (err) { |
03e1ad7b | 1401 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1402 | kfree(xp); |
1403 | return err; | |
1404 | } | |
1405 | ||
f60f6b8f | 1406 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1407 | c.seq = nlh->nlmsg_seq; |
1408 | c.pid = nlh->nlmsg_pid; | |
1409 | km_policy_notify(xp, p->dir, &c); | |
1410 | ||
1da177e4 LT |
1411 | xfrm_pol_put(xp); |
1412 | ||
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1417 | { | |
1418 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1419 | int i; | |
1420 | ||
1421 | if (xp->xfrm_nr == 0) | |
1422 | return 0; | |
1423 | ||
1424 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1425 | struct xfrm_user_tmpl *up = &vec[i]; | |
1426 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1427 | ||
1f86840f | 1428 | memset(up, 0, sizeof(*up)); |
1da177e4 | 1429 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
8511d01d | 1430 | up->family = kp->encap_family; |
1da177e4 LT |
1431 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1432 | up->reqid = kp->reqid; | |
1433 | up->mode = kp->mode; | |
1434 | up->share = kp->share; | |
1435 | up->optional = kp->optional; | |
1436 | up->aalgos = kp->aalgos; | |
1437 | up->ealgos = kp->ealgos; | |
1438 | up->calgos = kp->calgos; | |
1439 | } | |
df71837d | 1440 | |
c0144bea TG |
1441 | return nla_put(skb, XFRMA_TMPL, |
1442 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1443 | } |
1444 | ||
1445 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1446 | { | |
1447 | if (x->security) { | |
1448 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1449 | } |
1450 | return 0; | |
0d681623 | 1451 | } |
df71837d | 1452 | |
0d681623 SH |
1453 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1454 | { | |
1d1e34dd | 1455 | if (xp->security) |
0d681623 | 1456 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1457 | return 0; |
df71837d | 1458 | } |
cfbfd45a TG |
1459 | static inline size_t userpolicy_type_attrsize(void) |
1460 | { | |
1461 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1462 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1463 | #else | |
1464 | return 0; | |
1465 | #endif | |
1466 | } | |
df71837d | 1467 | |
f7b6983f | 1468 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1469 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1470 | { |
c0144bea TG |
1471 | struct xfrm_userpolicy_type upt = { |
1472 | .type = type, | |
1473 | }; | |
f7b6983f | 1474 | |
c0144bea | 1475 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1476 | } |
1477 | ||
1478 | #else | |
b798a9ed | 1479 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1480 | { |
1481 | return 0; | |
1482 | } | |
1483 | #endif | |
1484 | ||
1da177e4 LT |
1485 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1486 | { | |
1487 | struct xfrm_dump_info *sp = ptr; | |
1488 | struct xfrm_userpolicy_info *p; | |
1489 | struct sk_buff *in_skb = sp->in_skb; | |
1490 | struct sk_buff *skb = sp->out_skb; | |
1491 | struct nlmsghdr *nlh; | |
1d1e34dd | 1492 | int err; |
1da177e4 | 1493 | |
79b8b7f4 TG |
1494 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1495 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1496 | if (nlh == NULL) | |
1497 | return -EMSGSIZE; | |
1da177e4 | 1498 | |
7b67c857 | 1499 | p = nlmsg_data(nlh); |
1da177e4 | 1500 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1501 | err = copy_to_user_tmpl(xp, skb); |
1502 | if (!err) | |
1503 | err = copy_to_user_sec_ctx(xp, skb); | |
1504 | if (!err) | |
1505 | err = copy_to_user_policy_type(xp->type, skb); | |
1506 | if (!err) | |
1507 | err = xfrm_mark_put(skb, &xp->mark); | |
1508 | if (err) { | |
1509 | nlmsg_cancel(skb, nlh); | |
1510 | return err; | |
1511 | } | |
9825069d | 1512 | nlmsg_end(skb, nlh); |
1da177e4 | 1513 | return 0; |
1da177e4 LT |
1514 | } |
1515 | ||
4c563f76 TT |
1516 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1517 | { | |
1518 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1519 | ||
1520 | xfrm_policy_walk_done(walk); | |
1521 | return 0; | |
1522 | } | |
1523 | ||
1da177e4 LT |
1524 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1525 | { | |
fc34acd3 | 1526 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1527 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1528 | struct xfrm_dump_info info; |
1529 | ||
4c563f76 TT |
1530 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1531 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1532 | ||
1da177e4 LT |
1533 | info.in_skb = cb->skb; |
1534 | info.out_skb = skb; | |
1535 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1536 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1537 | |
1538 | if (!cb->args[0]) { | |
1539 | cb->args[0] = 1; | |
1540 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1541 | } | |
1542 | ||
fc34acd3 | 1543 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1544 | |
1545 | return skb->len; | |
1546 | } | |
1547 | ||
1548 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1549 | struct xfrm_policy *xp, | |
1550 | int dir, u32 seq) | |
1551 | { | |
1552 | struct xfrm_dump_info info; | |
1553 | struct sk_buff *skb; | |
c2546372 | 1554 | int err; |
1da177e4 | 1555 | |
7deb2264 | 1556 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1557 | if (!skb) |
1558 | return ERR_PTR(-ENOMEM); | |
1559 | ||
1da177e4 LT |
1560 | info.in_skb = in_skb; |
1561 | info.out_skb = skb; | |
1562 | info.nlmsg_seq = seq; | |
1563 | info.nlmsg_flags = 0; | |
1da177e4 | 1564 | |
c2546372 MK |
1565 | err = dump_one_policy(xp, dir, 0, &info); |
1566 | if (err) { | |
1da177e4 | 1567 | kfree_skb(skb); |
c2546372 | 1568 | return ERR_PTR(err); |
1da177e4 LT |
1569 | } |
1570 | ||
1571 | return skb; | |
1572 | } | |
1573 | ||
22e70050 | 1574 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1575 | struct nlattr **attrs) |
1da177e4 | 1576 | { |
fc34acd3 | 1577 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1578 | struct xfrm_policy *xp; |
1579 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1580 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1581 | int err; |
26b15dad | 1582 | struct km_event c; |
1da177e4 | 1583 | int delete; |
295fae56 JHS |
1584 | struct xfrm_mark m; |
1585 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1586 | |
7b67c857 | 1587 | p = nlmsg_data(nlh); |
1da177e4 LT |
1588 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1589 | ||
35a7aa08 | 1590 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1591 | if (err) |
1592 | return err; | |
1593 | ||
1da177e4 LT |
1594 | err = verify_policy_dir(p->dir); |
1595 | if (err) | |
1596 | return err; | |
1597 | ||
1598 | if (p->index) | |
295fae56 | 1599 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1600 | else { |
5424f32e | 1601 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1602 | struct xfrm_sec_ctx *ctx; |
df71837d | 1603 | |
35a7aa08 | 1604 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1605 | if (err) |
1606 | return err; | |
1607 | ||
2c8dd116 | 1608 | ctx = NULL; |
df71837d | 1609 | if (rt) { |
5424f32e | 1610 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1611 | |
03e1ad7b PM |
1612 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1613 | if (err) | |
df71837d | 1614 | return err; |
2c8dd116 | 1615 | } |
295fae56 | 1616 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1617 | ctx, delete, &err); |
03e1ad7b | 1618 | security_xfrm_policy_free(ctx); |
df71837d | 1619 | } |
1da177e4 LT |
1620 | if (xp == NULL) |
1621 | return -ENOENT; | |
1622 | ||
1623 | if (!delete) { | |
1624 | struct sk_buff *resp_skb; | |
1625 | ||
1626 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1627 | if (IS_ERR(resp_skb)) { | |
1628 | err = PTR_ERR(resp_skb); | |
1629 | } else { | |
a6483b79 | 1630 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1631 | NETLINK_CB(skb).pid); |
1da177e4 | 1632 | } |
26b15dad | 1633 | } else { |
c53fa1ed PM |
1634 | uid_t loginuid = audit_get_loginuid(current); |
1635 | u32 sessionid = audit_get_sessionid(current); | |
1636 | u32 sid; | |
2532386f | 1637 | |
c53fa1ed | 1638 | security_task_getsecid(current, &sid); |
2532386f EP |
1639 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, |
1640 | sid); | |
13fcfbb0 DM |
1641 | |
1642 | if (err != 0) | |
c8c05a8e | 1643 | goto out; |
13fcfbb0 | 1644 | |
e7443892 | 1645 | c.data.byid = p->index; |
f60f6b8f | 1646 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1647 | c.seq = nlh->nlmsg_seq; |
1648 | c.pid = nlh->nlmsg_pid; | |
1649 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1650 | } |
1651 | ||
c8c05a8e | 1652 | out: |
ef41aaa0 | 1653 | xfrm_pol_put(xp); |
1da177e4 LT |
1654 | return err; |
1655 | } | |
1656 | ||
22e70050 | 1657 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1658 | struct nlattr **attrs) |
1da177e4 | 1659 | { |
fc34acd3 | 1660 | struct net *net = sock_net(skb->sk); |
26b15dad | 1661 | struct km_event c; |
7b67c857 | 1662 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1663 | struct xfrm_audit audit_info; |
4aa2e62c | 1664 | int err; |
1da177e4 | 1665 | |
c53fa1ed PM |
1666 | audit_info.loginuid = audit_get_loginuid(current); |
1667 | audit_info.sessionid = audit_get_sessionid(current); | |
1668 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1669 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1670 | if (err) { |
1671 | if (err == -ESRCH) /* empty table */ | |
1672 | return 0; | |
069c474e | 1673 | return err; |
9e64cc95 | 1674 | } |
bf08867f | 1675 | c.data.proto = p->proto; |
f60f6b8f | 1676 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1677 | c.seq = nlh->nlmsg_seq; |
1678 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1679 | c.net = net; |
26b15dad JHS |
1680 | km_state_notify(NULL, &c); |
1681 | ||
1da177e4 LT |
1682 | return 0; |
1683 | } | |
1684 | ||
d8647b79 | 1685 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1686 | { |
d8647b79 SK |
1687 | size_t replay_size = x->replay_esn ? |
1688 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1689 | sizeof(struct xfrm_replay_state); | |
1690 | ||
7deb2264 | 1691 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1692 | + nla_total_size(replay_size) |
7deb2264 | 1693 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1694 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1695 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1696 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1697 | } | |
d51d081d | 1698 | |
214e005b | 1699 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1700 | { |
1701 | struct xfrm_aevent_id *id; | |
1702 | struct nlmsghdr *nlh; | |
1d1e34dd | 1703 | int err; |
d51d081d | 1704 | |
79b8b7f4 TG |
1705 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1706 | if (nlh == NULL) | |
1707 | return -EMSGSIZE; | |
d51d081d | 1708 | |
7b67c857 | 1709 | id = nlmsg_data(nlh); |
2b5f6dcc | 1710 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1711 | id->sa_id.spi = x->id.spi; |
1712 | id->sa_id.family = x->props.family; | |
1713 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1714 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1715 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1716 | id->flags = c->data.aevent; |
1717 | ||
d0fde795 | 1718 | if (x->replay_esn) { |
1d1e34dd DM |
1719 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1720 | xfrm_replay_state_esn_len(x->replay_esn), | |
1721 | x->replay_esn); | |
d0fde795 | 1722 | } else { |
1d1e34dd DM |
1723 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1724 | &x->replay); | |
d0fde795 | 1725 | } |
1d1e34dd DM |
1726 | if (err) |
1727 | goto out_cancel; | |
1728 | err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
1729 | if (err) | |
1730 | goto out_cancel; | |
d51d081d | 1731 | |
1d1e34dd DM |
1732 | if (id->flags & XFRM_AE_RTHR) { |
1733 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1734 | if (err) | |
1735 | goto out_cancel; | |
1736 | } | |
1737 | if (id->flags & XFRM_AE_ETHR) { | |
1738 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1739 | x->replay_maxage * 10 / HZ); | |
1740 | if (err) | |
1741 | goto out_cancel; | |
1742 | } | |
1743 | err = xfrm_mark_put(skb, &x->mark); | |
1744 | if (err) | |
1745 | goto out_cancel; | |
6f26b61e | 1746 | |
9825069d | 1747 | return nlmsg_end(skb, nlh); |
d51d081d | 1748 | |
1d1e34dd | 1749 | out_cancel: |
9825069d | 1750 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1751 | return err; |
d51d081d JHS |
1752 | } |
1753 | ||
22e70050 | 1754 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1755 | struct nlattr **attrs) |
d51d081d | 1756 | { |
fc34acd3 | 1757 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1758 | struct xfrm_state *x; |
1759 | struct sk_buff *r_skb; | |
1760 | int err; | |
1761 | struct km_event c; | |
6f26b61e JHS |
1762 | u32 mark; |
1763 | struct xfrm_mark m; | |
7b67c857 | 1764 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1765 | struct xfrm_usersa_id *id = &p->sa_id; |
1766 | ||
6f26b61e JHS |
1767 | mark = xfrm_mark_get(attrs, &m); |
1768 | ||
1769 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1770 | if (x == NULL) |
d51d081d | 1771 | return -ESRCH; |
d8647b79 SK |
1772 | |
1773 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1774 | if (r_skb == NULL) { | |
1775 | xfrm_state_put(x); | |
1776 | return -ENOMEM; | |
d51d081d JHS |
1777 | } |
1778 | ||
1779 | /* | |
1780 | * XXX: is this lock really needed - none of the other | |
1781 | * gets lock (the concern is things getting updated | |
1782 | * while we are still reading) - jhs | |
1783 | */ | |
1784 | spin_lock_bh(&x->lock); | |
1785 | c.data.aevent = p->flags; | |
1786 | c.seq = nlh->nlmsg_seq; | |
1787 | c.pid = nlh->nlmsg_pid; | |
1788 | ||
1789 | if (build_aevent(r_skb, x, &c) < 0) | |
1790 | BUG(); | |
a6483b79 | 1791 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1792 | spin_unlock_bh(&x->lock); |
1793 | xfrm_state_put(x); | |
1794 | return err; | |
1795 | } | |
1796 | ||
22e70050 | 1797 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1798 | struct nlattr **attrs) |
d51d081d | 1799 | { |
fc34acd3 | 1800 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1801 | struct xfrm_state *x; |
1802 | struct km_event c; | |
1803 | int err = - EINVAL; | |
6f26b61e JHS |
1804 | u32 mark = 0; |
1805 | struct xfrm_mark m; | |
7b67c857 | 1806 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1807 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1808 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1809 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1810 | |
d8647b79 | 1811 | if (!lt && !rp && !re) |
d51d081d JHS |
1812 | return err; |
1813 | ||
1814 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1815 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1816 | return err; | |
1817 | ||
6f26b61e JHS |
1818 | mark = xfrm_mark_get(attrs, &m); |
1819 | ||
1820 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1821 | if (x == NULL) |
1822 | return -ESRCH; | |
1823 | ||
1824 | if (x->km.state != XFRM_STATE_VALID) | |
1825 | goto out; | |
1826 | ||
e2b19125 SK |
1827 | err = xfrm_replay_verify_len(x->replay_esn, rp); |
1828 | if (err) | |
1829 | goto out; | |
1830 | ||
d51d081d | 1831 | spin_lock_bh(&x->lock); |
35a7aa08 | 1832 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1833 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1834 | |
1835 | c.event = nlh->nlmsg_type; | |
1836 | c.seq = nlh->nlmsg_seq; | |
1837 | c.pid = nlh->nlmsg_pid; | |
1838 | c.data.aevent = XFRM_AE_CU; | |
1839 | km_state_notify(x, &c); | |
1840 | err = 0; | |
1841 | out: | |
1842 | xfrm_state_put(x); | |
1843 | return err; | |
1844 | } | |
1845 | ||
22e70050 | 1846 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1847 | struct nlattr **attrs) |
1da177e4 | 1848 | { |
fc34acd3 | 1849 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1850 | struct km_event c; |
b798a9ed | 1851 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1852 | int err; |
161a09e7 | 1853 | struct xfrm_audit audit_info; |
f7b6983f | 1854 | |
35a7aa08 | 1855 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1856 | if (err) |
1857 | return err; | |
26b15dad | 1858 | |
c53fa1ed PM |
1859 | audit_info.loginuid = audit_get_loginuid(current); |
1860 | audit_info.sessionid = audit_get_sessionid(current); | |
1861 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1862 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1863 | if (err) { |
1864 | if (err == -ESRCH) /* empty table */ | |
1865 | return 0; | |
069c474e | 1866 | return err; |
2f1eb65f JHS |
1867 | } |
1868 | ||
f7b6983f | 1869 | c.data.type = type; |
f60f6b8f | 1870 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1871 | c.seq = nlh->nlmsg_seq; |
1872 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1873 | c.net = net; |
26b15dad | 1874 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1875 | return 0; |
1876 | } | |
1877 | ||
22e70050 | 1878 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1879 | struct nlattr **attrs) |
6c5c8ca7 | 1880 | { |
fc34acd3 | 1881 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1882 | struct xfrm_policy *xp; |
7b67c857 | 1883 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1884 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1885 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1886 | int err = -ENOENT; |
295fae56 JHS |
1887 | struct xfrm_mark m; |
1888 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1889 | |
35a7aa08 | 1890 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1891 | if (err) |
1892 | return err; | |
1893 | ||
c8bf4d04 TT |
1894 | err = verify_policy_dir(p->dir); |
1895 | if (err) | |
1896 | return err; | |
1897 | ||
6c5c8ca7 | 1898 | if (p->index) |
295fae56 | 1899 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1900 | else { |
5424f32e | 1901 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1902 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1903 | |
35a7aa08 | 1904 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1905 | if (err) |
1906 | return err; | |
1907 | ||
2c8dd116 | 1908 | ctx = NULL; |
6c5c8ca7 | 1909 | if (rt) { |
5424f32e | 1910 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1911 | |
03e1ad7b PM |
1912 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1913 | if (err) | |
6c5c8ca7 | 1914 | return err; |
2c8dd116 | 1915 | } |
295fae56 | 1916 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1917 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1918 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1919 | } |
6c5c8ca7 | 1920 | if (xp == NULL) |
ef41aaa0 | 1921 | return -ENOENT; |
03e1ad7b | 1922 | |
ea2dea9d | 1923 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1924 | goto out; |
6c5c8ca7 | 1925 | |
6c5c8ca7 JHS |
1926 | err = 0; |
1927 | if (up->hard) { | |
c53fa1ed PM |
1928 | uid_t loginuid = audit_get_loginuid(current); |
1929 | u32 sessionid = audit_get_sessionid(current); | |
1930 | u32 sid; | |
1931 | ||
1932 | security_task_getsecid(current, &sid); | |
6c5c8ca7 | 1933 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1934 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1935 | |
6c5c8ca7 JHS |
1936 | } else { |
1937 | // reset the timers here? | |
62db5cfd | 1938 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 JHS |
1939 | } |
1940 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1941 | ||
1942 | out: | |
1943 | xfrm_pol_put(xp); | |
1944 | return err; | |
1945 | } | |
1946 | ||
22e70050 | 1947 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1948 | struct nlattr **attrs) |
53bc6b4d | 1949 | { |
fc34acd3 | 1950 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1951 | struct xfrm_state *x; |
1952 | int err; | |
7b67c857 | 1953 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1954 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 1955 | struct xfrm_mark m; |
928497f0 | 1956 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 1957 | |
6f26b61e | 1958 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1959 | |
3a765aa5 | 1960 | err = -ENOENT; |
53bc6b4d JHS |
1961 | if (x == NULL) |
1962 | return err; | |
1963 | ||
53bc6b4d | 1964 | spin_lock_bh(&x->lock); |
3a765aa5 | 1965 | err = -EINVAL; |
53bc6b4d JHS |
1966 | if (x->km.state != XFRM_STATE_VALID) |
1967 | goto out; | |
1968 | km_state_expired(x, ue->hard, current->pid); | |
1969 | ||
161a09e7 | 1970 | if (ue->hard) { |
c53fa1ed PM |
1971 | uid_t loginuid = audit_get_loginuid(current); |
1972 | u32 sessionid = audit_get_sessionid(current); | |
1973 | u32 sid; | |
1974 | ||
1975 | security_task_getsecid(current, &sid); | |
53bc6b4d | 1976 | __xfrm_state_delete(x); |
2532386f | 1977 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1978 | } |
3a765aa5 | 1979 | err = 0; |
53bc6b4d JHS |
1980 | out: |
1981 | spin_unlock_bh(&x->lock); | |
1982 | xfrm_state_put(x); | |
1983 | return err; | |
1984 | } | |
1985 | ||
22e70050 | 1986 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1987 | struct nlattr **attrs) |
980ebd25 | 1988 | { |
fc34acd3 | 1989 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1990 | struct xfrm_policy *xp; |
1991 | struct xfrm_user_tmpl *ut; | |
1992 | int i; | |
5424f32e | 1993 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 1994 | struct xfrm_mark mark; |
980ebd25 | 1995 | |
7b67c857 | 1996 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1997 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1998 | int err = -ENOMEM; |
1999 | ||
2000 | if (!x) | |
d8eb9307 | 2001 | goto nomem; |
980ebd25 | 2002 | |
6f26b61e JHS |
2003 | xfrm_mark_get(attrs, &mark); |
2004 | ||
980ebd25 | 2005 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2006 | if (err) |
2007 | goto bad_policy; | |
980ebd25 JHS |
2008 | |
2009 | /* build an XP */ | |
fc34acd3 | 2010 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2011 | if (!xp) |
2012 | goto free_state; | |
980ebd25 JHS |
2013 | |
2014 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2015 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2016 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2017 | xp->mark.m = x->mark.m = mark.m; |
2018 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2019 | ut = nla_data(rt); |
980ebd25 JHS |
2020 | /* extract the templates and for each call km_key */ |
2021 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2022 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2023 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2024 | x->props.mode = t->mode; | |
2025 | x->props.reqid = t->reqid; | |
2026 | x->props.family = ut->family; | |
2027 | t->aalgos = ua->aalgos; | |
2028 | t->ealgos = ua->ealgos; | |
2029 | t->calgos = ua->calgos; | |
2030 | err = km_query(x, t, xp); | |
2031 | ||
2032 | } | |
2033 | ||
2034 | kfree(x); | |
2035 | kfree(xp); | |
2036 | ||
2037 | return 0; | |
d8eb9307 IJ |
2038 | |
2039 | bad_policy: | |
62db5cfd | 2040 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2041 | free_state: |
2042 | kfree(x); | |
2043 | nomem: | |
2044 | return err; | |
980ebd25 JHS |
2045 | } |
2046 | ||
5c79de6e | 2047 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2048 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2049 | struct xfrm_kmaddress *k, |
5424f32e | 2050 | struct nlattr **attrs, int *num) |
5c79de6e | 2051 | { |
5424f32e | 2052 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2053 | struct xfrm_user_migrate *um; |
2054 | int i, num_migrate; | |
2055 | ||
13c1d189 AE |
2056 | if (k != NULL) { |
2057 | struct xfrm_user_kmaddress *uk; | |
2058 | ||
2059 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2060 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2061 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2062 | k->family = uk->family; | |
2063 | k->reserved = uk->reserved; | |
2064 | } | |
2065 | ||
5424f32e TG |
2066 | um = nla_data(rt); |
2067 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2068 | |
2069 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2070 | return -EINVAL; | |
2071 | ||
2072 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2073 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2074 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2075 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2076 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2077 | ||
2078 | ma->proto = um->proto; | |
2079 | ma->mode = um->mode; | |
2080 | ma->reqid = um->reqid; | |
2081 | ||
2082 | ma->old_family = um->old_family; | |
2083 | ma->new_family = um->new_family; | |
2084 | } | |
2085 | ||
2086 | *num = i; | |
2087 | return 0; | |
2088 | } | |
2089 | ||
2090 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2091 | struct nlattr **attrs) |
5c79de6e | 2092 | { |
7b67c857 | 2093 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2094 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2095 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2096 | u8 type; |
2097 | int err; | |
2098 | int n = 0; | |
2099 | ||
35a7aa08 | 2100 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2101 | return -EINVAL; |
5c79de6e | 2102 | |
13c1d189 AE |
2103 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2104 | ||
5424f32e | 2105 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2106 | if (err) |
2107 | return err; | |
2108 | ||
13c1d189 | 2109 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2110 | if (err) |
2111 | return err; | |
2112 | ||
2113 | if (!n) | |
2114 | return 0; | |
2115 | ||
13c1d189 | 2116 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
2117 | |
2118 | return 0; | |
2119 | } | |
2120 | #else | |
2121 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2122 | struct nlattr **attrs) |
5c79de6e SS |
2123 | { |
2124 | return -ENOPROTOOPT; | |
2125 | } | |
2126 | #endif | |
2127 | ||
2128 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2129 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2130 | { |
2131 | struct xfrm_user_migrate um; | |
2132 | ||
2133 | memset(&um, 0, sizeof(um)); | |
2134 | um.proto = m->proto; | |
2135 | um.mode = m->mode; | |
2136 | um.reqid = m->reqid; | |
2137 | um.old_family = m->old_family; | |
2138 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2139 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2140 | um.new_family = m->new_family; | |
2141 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2142 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2143 | ||
c0144bea | 2144 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2145 | } |
2146 | ||
183cad12 | 2147 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2148 | { |
2149 | struct xfrm_user_kmaddress uk; | |
2150 | ||
2151 | memset(&uk, 0, sizeof(uk)); | |
2152 | uk.family = k->family; | |
2153 | uk.reserved = k->reserved; | |
2154 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2155 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2156 | |
2157 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2158 | } | |
2159 | ||
2160 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2161 | { |
2162 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2163 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2164 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2165 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2166 | } |
2167 | ||
183cad12 DM |
2168 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2169 | int num_migrate, const struct xfrm_kmaddress *k, | |
2170 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2171 | { |
183cad12 | 2172 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2173 | struct xfrm_userpolicy_id *pol_id; |
2174 | struct nlmsghdr *nlh; | |
1d1e34dd | 2175 | int i, err; |
5c79de6e | 2176 | |
79b8b7f4 TG |
2177 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2178 | if (nlh == NULL) | |
2179 | return -EMSGSIZE; | |
5c79de6e | 2180 | |
7b67c857 | 2181 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2182 | /* copy data from selector, dir, and type to the pol_id */ |
2183 | memset(pol_id, 0, sizeof(*pol_id)); | |
2184 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2185 | pol_id->dir = dir; | |
2186 | ||
1d1e34dd DM |
2187 | if (k != NULL) { |
2188 | err = copy_to_user_kmaddress(k, skb); | |
2189 | if (err) | |
2190 | goto out_cancel; | |
2191 | } | |
2192 | err = copy_to_user_policy_type(type, skb); | |
2193 | if (err) | |
2194 | goto out_cancel; | |
5c79de6e | 2195 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2196 | err = copy_to_user_migrate(mp, skb); |
2197 | if (err) | |
2198 | goto out_cancel; | |
5c79de6e SS |
2199 | } |
2200 | ||
9825069d | 2201 | return nlmsg_end(skb, nlh); |
1d1e34dd DM |
2202 | |
2203 | out_cancel: | |
9825069d | 2204 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2205 | return err; |
5c79de6e SS |
2206 | } |
2207 | ||
183cad12 DM |
2208 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2209 | const struct xfrm_migrate *m, int num_migrate, | |
2210 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2211 | { |
a6483b79 | 2212 | struct net *net = &init_net; |
5c79de6e | 2213 | struct sk_buff *skb; |
5c79de6e | 2214 | |
13c1d189 | 2215 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2216 | if (skb == NULL) |
2217 | return -ENOMEM; | |
2218 | ||
2219 | /* build migrate */ | |
13c1d189 | 2220 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2221 | BUG(); |
2222 | ||
a6483b79 | 2223 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2224 | } |
2225 | #else | |
183cad12 DM |
2226 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2227 | const struct xfrm_migrate *m, int num_migrate, | |
2228 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2229 | { |
2230 | return -ENOPROTOOPT; | |
2231 | } | |
2232 | #endif | |
d51d081d | 2233 | |
a7bd9a45 | 2234 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2235 | |
2236 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2237 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2238 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2239 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2240 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2241 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2242 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2243 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2244 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2245 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2246 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2247 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2248 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2249 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2250 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2251 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2252 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2253 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2254 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2255 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2256 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2257 | }; |
2258 | ||
492b558b TG |
2259 | #undef XMSGSIZE |
2260 | ||
cf5cb79f | 2261 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2262 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2263 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2264 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2265 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2266 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2267 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2268 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2269 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2270 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2271 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2272 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2273 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2274 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2275 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2276 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2277 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2278 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2279 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2280 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2281 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2282 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2283 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2284 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
cf5cb79f TG |
2285 | }; |
2286 | ||
1da177e4 | 2287 | static struct xfrm_link { |
5424f32e | 2288 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2289 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2290 | int (*done)(struct netlink_callback *); |
492b558b TG |
2291 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2292 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2293 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2294 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2295 | .dump = xfrm_dump_sa, |
2296 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2297 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2298 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2299 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2300 | .dump = xfrm_dump_policy, |
2301 | .done = xfrm_dump_policy_done }, | |
492b558b | 2302 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2303 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2304 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2305 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2306 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2307 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2308 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2309 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2310 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2311 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2312 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2313 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2314 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2315 | }; |
2316 | ||
1d00a4eb | 2317 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2318 | { |
a6483b79 | 2319 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2320 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2321 | struct xfrm_link *link; |
a7bd9a45 | 2322 | int type, err; |
1da177e4 | 2323 | |
1da177e4 | 2324 | type = nlh->nlmsg_type; |
1da177e4 | 2325 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2326 | return -EINVAL; |
1da177e4 LT |
2327 | |
2328 | type -= XFRM_MSG_BASE; | |
2329 | link = &xfrm_dispatch[type]; | |
2330 | ||
2331 | /* All operations require privileges, even GET */ | |
fd778461 | 2332 | if (!capable(CAP_NET_ADMIN)) |
1d00a4eb | 2333 | return -EPERM; |
1da177e4 | 2334 | |
492b558b TG |
2335 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2336 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2337 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2338 | if (link->dump == NULL) |
1d00a4eb | 2339 | return -EINVAL; |
88fc2c84 | 2340 | |
80d326fa PNA |
2341 | { |
2342 | struct netlink_dump_control c = { | |
2343 | .dump = link->dump, | |
2344 | .done = link->done, | |
2345 | }; | |
2346 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2347 | } | |
1da177e4 LT |
2348 | } |
2349 | ||
35a7aa08 | 2350 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2351 | xfrma_policy); |
a7bd9a45 TG |
2352 | if (err < 0) |
2353 | return err; | |
1da177e4 LT |
2354 | |
2355 | if (link->doit == NULL) | |
1d00a4eb | 2356 | return -EINVAL; |
1da177e4 | 2357 | |
5424f32e | 2358 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2359 | } |
2360 | ||
cd40b7d3 | 2361 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2362 | { |
cd40b7d3 DL |
2363 | mutex_lock(&xfrm_cfg_mutex); |
2364 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2365 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2366 | } |
2367 | ||
7deb2264 TG |
2368 | static inline size_t xfrm_expire_msgsize(void) |
2369 | { | |
6f26b61e JHS |
2370 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2371 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2372 | } |
2373 | ||
214e005b | 2374 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2375 | { |
2376 | struct xfrm_user_expire *ue; | |
2377 | struct nlmsghdr *nlh; | |
1d1e34dd | 2378 | int err; |
1da177e4 | 2379 | |
79b8b7f4 TG |
2380 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2381 | if (nlh == NULL) | |
2382 | return -EMSGSIZE; | |
1da177e4 | 2383 | |
7b67c857 | 2384 | ue = nlmsg_data(nlh); |
1da177e4 | 2385 | copy_to_user_state(x, &ue->state); |
d51d081d | 2386 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2387 | |
1d1e34dd DM |
2388 | err = xfrm_mark_put(skb, &x->mark); |
2389 | if (err) | |
2390 | return err; | |
6f26b61e | 2391 | |
9825069d | 2392 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2393 | } |
2394 | ||
214e005b | 2395 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2396 | { |
fc34acd3 | 2397 | struct net *net = xs_net(x); |
1da177e4 LT |
2398 | struct sk_buff *skb; |
2399 | ||
7deb2264 | 2400 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2401 | if (skb == NULL) |
2402 | return -ENOMEM; | |
2403 | ||
6f26b61e JHS |
2404 | if (build_expire(skb, x, c) < 0) { |
2405 | kfree_skb(skb); | |
2406 | return -EMSGSIZE; | |
2407 | } | |
1da177e4 | 2408 | |
a6483b79 | 2409 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2410 | } |
2411 | ||
214e005b | 2412 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2413 | { |
fc34acd3 | 2414 | struct net *net = xs_net(x); |
d51d081d | 2415 | struct sk_buff *skb; |
d51d081d | 2416 | |
d8647b79 | 2417 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2418 | if (skb == NULL) |
2419 | return -ENOMEM; | |
2420 | ||
2421 | if (build_aevent(skb, x, c) < 0) | |
2422 | BUG(); | |
2423 | ||
a6483b79 | 2424 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2425 | } |
2426 | ||
214e005b | 2427 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2428 | { |
7067802e | 2429 | struct net *net = c->net; |
26b15dad JHS |
2430 | struct xfrm_usersa_flush *p; |
2431 | struct nlmsghdr *nlh; | |
2432 | struct sk_buff *skb; | |
7deb2264 | 2433 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2434 | |
7deb2264 | 2435 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2436 | if (skb == NULL) |
2437 | return -ENOMEM; | |
26b15dad | 2438 | |
79b8b7f4 TG |
2439 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2440 | if (nlh == NULL) { | |
2441 | kfree_skb(skb); | |
2442 | return -EMSGSIZE; | |
2443 | } | |
26b15dad | 2444 | |
7b67c857 | 2445 | p = nlmsg_data(nlh); |
bf08867f | 2446 | p->proto = c->data.proto; |
26b15dad | 2447 | |
9825069d | 2448 | nlmsg_end(skb, nlh); |
26b15dad | 2449 | |
a6483b79 | 2450 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2451 | } |
2452 | ||
7deb2264 | 2453 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2454 | { |
7deb2264 | 2455 | size_t l = 0; |
1a6509d9 HX |
2456 | if (x->aead) |
2457 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2458 | if (x->aalg) { |
2459 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2460 | (x->aalg->alg_key_len + 7) / 8); | |
2461 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2462 | } | |
26b15dad | 2463 | if (x->ealg) |
0f99be0d | 2464 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2465 | if (x->calg) |
7deb2264 | 2466 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2467 | if (x->encap) |
7deb2264 | 2468 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2469 | if (x->tfcpad) |
2470 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2471 | if (x->replay_esn) |
2472 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
68325d3b HX |
2473 | if (x->security) |
2474 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2475 | x->security->ctx_len); | |
2476 | if (x->coaddr) | |
2477 | l += nla_total_size(sizeof(*x->coaddr)); | |
2478 | ||
d26f3984 HX |
2479 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2480 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2481 | |
2482 | return l; | |
2483 | } | |
2484 | ||
214e005b | 2485 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2486 | { |
fc34acd3 | 2487 | struct net *net = xs_net(x); |
26b15dad | 2488 | struct xfrm_usersa_info *p; |
0603eac0 | 2489 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2490 | struct nlmsghdr *nlh; |
2491 | struct sk_buff *skb; | |
26b15dad | 2492 | int len = xfrm_sa_len(x); |
1d1e34dd | 2493 | int headlen, err; |
0603eac0 HX |
2494 | |
2495 | headlen = sizeof(*p); | |
2496 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2497 | len += nla_total_size(headlen); |
0603eac0 | 2498 | headlen = sizeof(*id); |
6f26b61e | 2499 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2500 | } |
7deb2264 | 2501 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2502 | |
7deb2264 | 2503 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2504 | if (skb == NULL) |
2505 | return -ENOMEM; | |
26b15dad | 2506 | |
79b8b7f4 | 2507 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2508 | err = -EMSGSIZE; |
79b8b7f4 | 2509 | if (nlh == NULL) |
1d1e34dd | 2510 | goto out_free_skb; |
26b15dad | 2511 | |
7b67c857 | 2512 | p = nlmsg_data(nlh); |
0603eac0 | 2513 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2514 | struct nlattr *attr; |
2515 | ||
7b67c857 | 2516 | id = nlmsg_data(nlh); |
0603eac0 HX |
2517 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2518 | id->spi = x->id.spi; | |
2519 | id->family = x->props.family; | |
2520 | id->proto = x->id.proto; | |
2521 | ||
c0144bea | 2522 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2523 | err = -EMSGSIZE; |
c0144bea | 2524 | if (attr == NULL) |
1d1e34dd | 2525 | goto out_free_skb; |
c0144bea TG |
2526 | |
2527 | p = nla_data(attr); | |
0603eac0 | 2528 | } |
1d1e34dd DM |
2529 | err = copy_to_user_state_extra(x, p, skb); |
2530 | if (err) | |
2531 | goto out_free_skb; | |
26b15dad | 2532 | |
9825069d | 2533 | nlmsg_end(skb, nlh); |
26b15dad | 2534 | |
a6483b79 | 2535 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2536 | |
1d1e34dd | 2537 | out_free_skb: |
26b15dad | 2538 | kfree_skb(skb); |
1d1e34dd | 2539 | return err; |
26b15dad JHS |
2540 | } |
2541 | ||
214e005b | 2542 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2543 | { |
2544 | ||
2545 | switch (c->event) { | |
f60f6b8f | 2546 | case XFRM_MSG_EXPIRE: |
26b15dad | 2547 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2548 | case XFRM_MSG_NEWAE: |
2549 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2550 | case XFRM_MSG_DELSA: |
2551 | case XFRM_MSG_UPDSA: | |
2552 | case XFRM_MSG_NEWSA: | |
26b15dad | 2553 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2554 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2555 | return xfrm_notify_sa_flush(c); |
2556 | default: | |
62db5cfd | 2557 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2558 | c->event); | |
2559 | break; | |
26b15dad JHS |
2560 | } |
2561 | ||
2562 | return 0; | |
2563 | ||
2564 | } | |
2565 | ||
7deb2264 TG |
2566 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2567 | struct xfrm_policy *xp) | |
2568 | { | |
2569 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2570 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2571 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2572 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2573 | + userpolicy_type_attrsize(); | |
2574 | } | |
2575 | ||
1da177e4 LT |
2576 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2577 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2578 | int dir) | |
2579 | { | |
1d1e34dd | 2580 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2581 | struct xfrm_user_acquire *ua; |
2582 | struct nlmsghdr *nlh; | |
1d1e34dd | 2583 | int err; |
1da177e4 | 2584 | |
79b8b7f4 TG |
2585 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2586 | if (nlh == NULL) | |
2587 | return -EMSGSIZE; | |
1da177e4 | 2588 | |
7b67c857 | 2589 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2590 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2591 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2592 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2593 | copy_to_user_policy(xp, &ua->policy, dir); | |
2594 | ua->aalgos = xt->aalgos; | |
2595 | ua->ealgos = xt->ealgos; | |
2596 | ua->calgos = xt->calgos; | |
2597 | ua->seq = x->km.seq = seq; | |
2598 | ||
1d1e34dd DM |
2599 | err = copy_to_user_tmpl(xp, skb); |
2600 | if (!err) | |
2601 | err = copy_to_user_state_sec_ctx(x, skb); | |
2602 | if (!err) | |
2603 | err = copy_to_user_policy_type(xp->type, skb); | |
2604 | if (!err) | |
2605 | err = xfrm_mark_put(skb, &xp->mark); | |
2606 | if (err) { | |
2607 | nlmsg_cancel(skb, nlh); | |
2608 | return err; | |
2609 | } | |
1da177e4 | 2610 | |
9825069d | 2611 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2612 | } |
2613 | ||
2614 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2615 | struct xfrm_policy *xp, int dir) | |
2616 | { | |
a6483b79 | 2617 | struct net *net = xs_net(x); |
1da177e4 | 2618 | struct sk_buff *skb; |
1da177e4 | 2619 | |
7deb2264 | 2620 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2621 | if (skb == NULL) |
2622 | return -ENOMEM; | |
2623 | ||
2624 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2625 | BUG(); | |
2626 | ||
a6483b79 | 2627 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2628 | } |
2629 | ||
2630 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2631 | * or more templates. | |
2632 | */ | |
cb969f07 | 2633 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2634 | u8 *data, int len, int *dir) |
2635 | { | |
fc34acd3 | 2636 | struct net *net = sock_net(sk); |
1da177e4 LT |
2637 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2638 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2639 | struct xfrm_policy *xp; | |
2640 | int nr; | |
2641 | ||
cb969f07 | 2642 | switch (sk->sk_family) { |
1da177e4 LT |
2643 | case AF_INET: |
2644 | if (opt != IP_XFRM_POLICY) { | |
2645 | *dir = -EOPNOTSUPP; | |
2646 | return NULL; | |
2647 | } | |
2648 | break; | |
dfd56b8b | 2649 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2650 | case AF_INET6: |
2651 | if (opt != IPV6_XFRM_POLICY) { | |
2652 | *dir = -EOPNOTSUPP; | |
2653 | return NULL; | |
2654 | } | |
2655 | break; | |
2656 | #endif | |
2657 | default: | |
2658 | *dir = -EINVAL; | |
2659 | return NULL; | |
2660 | } | |
2661 | ||
2662 | *dir = -EINVAL; | |
2663 | ||
2664 | if (len < sizeof(*p) || | |
2665 | verify_newpolicy_info(p)) | |
2666 | return NULL; | |
2667 | ||
2668 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2669 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2670 | return NULL; |
2671 | ||
a4f1bac6 HX |
2672 | if (p->dir > XFRM_POLICY_OUT) |
2673 | return NULL; | |
2674 | ||
2f09a4d5 | 2675 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2676 | if (xp == NULL) { |
2677 | *dir = -ENOBUFS; | |
2678 | return NULL; | |
2679 | } | |
2680 | ||
2681 | copy_from_user_policy(xp, p); | |
f7b6983f | 2682 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2683 | copy_templates(xp, ut, nr); |
2684 | ||
2685 | *dir = p->dir; | |
2686 | ||
2687 | return xp; | |
2688 | } | |
2689 | ||
7deb2264 TG |
2690 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2691 | { | |
2692 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2693 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2694 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2695 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2696 | + userpolicy_type_attrsize(); |
2697 | } | |
2698 | ||
1da177e4 | 2699 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2700 | int dir, const struct km_event *c) |
1da177e4 LT |
2701 | { |
2702 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2703 | int hard = c->data.hard; |
1d1e34dd DM |
2704 | struct nlmsghdr *nlh; |
2705 | int err; | |
1da177e4 | 2706 | |
79b8b7f4 TG |
2707 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2708 | if (nlh == NULL) | |
2709 | return -EMSGSIZE; | |
1da177e4 | 2710 | |
7b67c857 | 2711 | upe = nlmsg_data(nlh); |
1da177e4 | 2712 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2713 | err = copy_to_user_tmpl(xp, skb); |
2714 | if (!err) | |
2715 | err = copy_to_user_sec_ctx(xp, skb); | |
2716 | if (!err) | |
2717 | err = copy_to_user_policy_type(xp->type, skb); | |
2718 | if (!err) | |
2719 | err = xfrm_mark_put(skb, &xp->mark); | |
2720 | if (err) { | |
2721 | nlmsg_cancel(skb, nlh); | |
2722 | return err; | |
2723 | } | |
1da177e4 LT |
2724 | upe->hard = !!hard; |
2725 | ||
9825069d | 2726 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2727 | } |
2728 | ||
214e005b | 2729 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2730 | { |
fc34acd3 | 2731 | struct net *net = xp_net(xp); |
1da177e4 | 2732 | struct sk_buff *skb; |
1da177e4 | 2733 | |
7deb2264 | 2734 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2735 | if (skb == NULL) |
2736 | return -ENOMEM; | |
2737 | ||
d51d081d | 2738 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2739 | BUG(); |
2740 | ||
a6483b79 | 2741 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2742 | } |
2743 | ||
214e005b | 2744 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2745 | { |
1d1e34dd | 2746 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2747 | struct net *net = xp_net(xp); |
26b15dad | 2748 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2749 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2750 | struct nlmsghdr *nlh; |
2751 | struct sk_buff *skb; | |
1d1e34dd | 2752 | int headlen, err; |
0603eac0 HX |
2753 | |
2754 | headlen = sizeof(*p); | |
2755 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2756 | len += nla_total_size(headlen); |
0603eac0 HX |
2757 | headlen = sizeof(*id); |
2758 | } | |
cfbfd45a | 2759 | len += userpolicy_type_attrsize(); |
295fae56 | 2760 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2761 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2762 | |
7deb2264 | 2763 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2764 | if (skb == NULL) |
2765 | return -ENOMEM; | |
26b15dad | 2766 | |
79b8b7f4 | 2767 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2768 | err = -EMSGSIZE; |
79b8b7f4 | 2769 | if (nlh == NULL) |
1d1e34dd | 2770 | goto out_free_skb; |
26b15dad | 2771 | |
7b67c857 | 2772 | p = nlmsg_data(nlh); |
0603eac0 | 2773 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2774 | struct nlattr *attr; |
2775 | ||
7b67c857 | 2776 | id = nlmsg_data(nlh); |
0603eac0 HX |
2777 | memset(id, 0, sizeof(*id)); |
2778 | id->dir = dir; | |
2779 | if (c->data.byid) | |
2780 | id->index = xp->index; | |
2781 | else | |
2782 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2783 | ||
c0144bea | 2784 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2785 | err = -EMSGSIZE; |
c0144bea | 2786 | if (attr == NULL) |
1d1e34dd | 2787 | goto out_free_skb; |
c0144bea TG |
2788 | |
2789 | p = nla_data(attr); | |
0603eac0 | 2790 | } |
26b15dad | 2791 | |
26b15dad | 2792 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2793 | err = copy_to_user_tmpl(xp, skb); |
2794 | if (!err) | |
2795 | err = copy_to_user_policy_type(xp->type, skb); | |
2796 | if (!err) | |
2797 | err = xfrm_mark_put(skb, &xp->mark); | |
2798 | if (err) | |
2799 | goto out_free_skb; | |
295fae56 | 2800 | |
9825069d | 2801 | nlmsg_end(skb, nlh); |
26b15dad | 2802 | |
a6483b79 | 2803 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2804 | |
1d1e34dd | 2805 | out_free_skb: |
26b15dad | 2806 | kfree_skb(skb); |
1d1e34dd | 2807 | return err; |
26b15dad JHS |
2808 | } |
2809 | ||
214e005b | 2810 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2811 | { |
7067802e | 2812 | struct net *net = c->net; |
26b15dad JHS |
2813 | struct nlmsghdr *nlh; |
2814 | struct sk_buff *skb; | |
1d1e34dd | 2815 | int err; |
26b15dad | 2816 | |
7deb2264 | 2817 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2818 | if (skb == NULL) |
2819 | return -ENOMEM; | |
26b15dad | 2820 | |
79b8b7f4 | 2821 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2822 | err = -EMSGSIZE; |
79b8b7f4 | 2823 | if (nlh == NULL) |
1d1e34dd DM |
2824 | goto out_free_skb; |
2825 | err = copy_to_user_policy_type(c->data.type, skb); | |
2826 | if (err) | |
2827 | goto out_free_skb; | |
26b15dad | 2828 | |
9825069d | 2829 | nlmsg_end(skb, nlh); |
26b15dad | 2830 | |
a6483b79 | 2831 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2832 | |
1d1e34dd | 2833 | out_free_skb: |
26b15dad | 2834 | kfree_skb(skb); |
1d1e34dd | 2835 | return err; |
26b15dad JHS |
2836 | } |
2837 | ||
214e005b | 2838 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2839 | { |
2840 | ||
2841 | switch (c->event) { | |
f60f6b8f HX |
2842 | case XFRM_MSG_NEWPOLICY: |
2843 | case XFRM_MSG_UPDPOLICY: | |
2844 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2845 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2846 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2847 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2848 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2849 | return xfrm_exp_policy_notify(xp, dir, c); |
2850 | default: | |
62db5cfd | 2851 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2852 | c->event); | |
26b15dad JHS |
2853 | } |
2854 | ||
2855 | return 0; | |
2856 | ||
2857 | } | |
2858 | ||
7deb2264 TG |
2859 | static inline size_t xfrm_report_msgsize(void) |
2860 | { | |
2861 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2862 | } | |
2863 | ||
97a64b45 MN |
2864 | static int build_report(struct sk_buff *skb, u8 proto, |
2865 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2866 | { | |
2867 | struct xfrm_user_report *ur; | |
2868 | struct nlmsghdr *nlh; | |
97a64b45 | 2869 | |
79b8b7f4 TG |
2870 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2871 | if (nlh == NULL) | |
2872 | return -EMSGSIZE; | |
97a64b45 | 2873 | |
7b67c857 | 2874 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2875 | ur->proto = proto; |
2876 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2877 | ||
1d1e34dd DM |
2878 | if (addr) { |
2879 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2880 | if (err) { | |
2881 | nlmsg_cancel(skb, nlh); | |
2882 | return err; | |
2883 | } | |
2884 | } | |
9825069d | 2885 | return nlmsg_end(skb, nlh); |
97a64b45 MN |
2886 | } |
2887 | ||
db983c11 AD |
2888 | static int xfrm_send_report(struct net *net, u8 proto, |
2889 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2890 | { |
2891 | struct sk_buff *skb; | |
97a64b45 | 2892 | |
7deb2264 | 2893 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2894 | if (skb == NULL) |
2895 | return -ENOMEM; | |
2896 | ||
2897 | if (build_report(skb, proto, sel, addr) < 0) | |
2898 | BUG(); | |
2899 | ||
a6483b79 | 2900 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2901 | } |
2902 | ||
3a2dfbe8 MW |
2903 | static inline size_t xfrm_mapping_msgsize(void) |
2904 | { | |
2905 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2906 | } | |
2907 | ||
2908 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2909 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2910 | { | |
2911 | struct xfrm_user_mapping *um; | |
2912 | struct nlmsghdr *nlh; | |
2913 | ||
2914 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2915 | if (nlh == NULL) | |
2916 | return -EMSGSIZE; | |
2917 | ||
2918 | um = nlmsg_data(nlh); | |
2919 | ||
2920 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2921 | um->id.spi = x->id.spi; | |
2922 | um->id.family = x->props.family; | |
2923 | um->id.proto = x->id.proto; | |
2924 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2925 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2926 | um->new_sport = new_sport; | |
2927 | um->old_sport = x->encap->encap_sport; | |
2928 | um->reqid = x->props.reqid; | |
2929 | ||
2930 | return nlmsg_end(skb, nlh); | |
2931 | } | |
2932 | ||
2933 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2934 | __be16 sport) | |
2935 | { | |
a6483b79 | 2936 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2937 | struct sk_buff *skb; |
2938 | ||
2939 | if (x->id.proto != IPPROTO_ESP) | |
2940 | return -EINVAL; | |
2941 | ||
2942 | if (!x->encap) | |
2943 | return -EINVAL; | |
2944 | ||
2945 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2946 | if (skb == NULL) | |
2947 | return -ENOMEM; | |
2948 | ||
2949 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2950 | BUG(); | |
2951 | ||
a6483b79 | 2952 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2953 | } |
2954 | ||
1da177e4 LT |
2955 | static struct xfrm_mgr netlink_mgr = { |
2956 | .id = "netlink", | |
2957 | .notify = xfrm_send_state_notify, | |
2958 | .acquire = xfrm_send_acquire, | |
2959 | .compile_policy = xfrm_compile_policy, | |
2960 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2961 | .report = xfrm_send_report, |
5c79de6e | 2962 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2963 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2964 | }; |
2965 | ||
a6483b79 | 2966 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2967 | { |
be33690d | 2968 | struct sock *nlsk; |
a31f2d17 PNA |
2969 | struct netlink_kernel_cfg cfg = { |
2970 | .groups = XFRMNLGRP_MAX, | |
2971 | .input = xfrm_netlink_rcv, | |
2972 | }; | |
be33690d | 2973 | |
a31f2d17 | 2974 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, THIS_MODULE, &cfg); |
be33690d | 2975 | if (nlsk == NULL) |
1da177e4 | 2976 | return -ENOMEM; |
d79d792e | 2977 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 2978 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2979 | return 0; |
2980 | } | |
2981 | ||
d79d792e | 2982 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 2983 | { |
d79d792e EB |
2984 | struct net *net; |
2985 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 2986 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
2987 | synchronize_net(); |
2988 | list_for_each_entry(net, net_exit_list, exit_list) | |
2989 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
2990 | } |
2991 | ||
a6483b79 | 2992 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
2993 | .init = xfrm_user_net_init, |
2994 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
2995 | }; |
2996 | ||
2997 | static int __init xfrm_user_init(void) | |
2998 | { | |
2999 | int rv; | |
3000 | ||
3001 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
3002 | ||
3003 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3004 | if (rv < 0) | |
3005 | return rv; | |
3006 | rv = xfrm_register_km(&netlink_mgr); | |
3007 | if (rv < 0) | |
3008 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3009 | return rv; | |
3010 | } | |
3011 | ||
3012 | static void __exit xfrm_user_exit(void) | |
3013 | { | |
3014 | xfrm_unregister_km(&netlink_mgr); | |
3015 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3016 | } | |
3017 | ||
1da177e4 LT |
3018 | module_init(xfrm_user_init); |
3019 | module_exit(xfrm_user_exit); | |
3020 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3021 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3022 |