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]; | |
ecd79187 | 126 | struct xfrm_replay_state_esn *rs; |
d8647b79 | 127 | |
ecd79187 MK |
128 | if (p->flags & XFRM_STATE_ESN) { |
129 | if (!rt) | |
130 | return -EINVAL; | |
131 | ||
132 | rs = nla_data(rt); | |
133 | ||
134 | if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) | |
135 | return -EINVAL; | |
136 | ||
137 | if (nla_len(rt) < xfrm_replay_state_esn_len(rs) && | |
138 | nla_len(rt) != sizeof(*rs)) | |
139 | return -EINVAL; | |
140 | } | |
7833aa05 | 141 | |
d8647b79 SK |
142 | if (!rt) |
143 | return 0; | |
144 | ||
02aadf72 SK |
145 | if (p->id.proto != IPPROTO_ESP) |
146 | return -EINVAL; | |
147 | ||
d8647b79 SK |
148 | if (p->replay_window != 0) |
149 | return -EINVAL; | |
150 | ||
151 | return 0; | |
152 | } | |
df71837d | 153 | |
1da177e4 | 154 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 155 | struct nlattr **attrs) |
1da177e4 LT |
156 | { |
157 | int err; | |
158 | ||
159 | err = -EINVAL; | |
160 | switch (p->family) { | |
161 | case AF_INET: | |
162 | break; | |
163 | ||
164 | case AF_INET6: | |
dfd56b8b | 165 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
166 | break; |
167 | #else | |
168 | err = -EAFNOSUPPORT; | |
169 | goto out; | |
170 | #endif | |
171 | ||
172 | default: | |
173 | goto out; | |
3ff50b79 | 174 | } |
1da177e4 LT |
175 | |
176 | err = -EINVAL; | |
177 | switch (p->id.proto) { | |
178 | case IPPROTO_AH: | |
4447bb33 MW |
179 | if ((!attrs[XFRMA_ALG_AUTH] && |
180 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 181 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 182 | attrs[XFRMA_ALG_CRYPT] || |
35d2856b | 183 | attrs[XFRMA_ALG_COMP] || |
ea9884b3 FD |
184 | attrs[XFRMA_TFCPAD] || |
185 | (ntohl(p->id.spi) >= 0x10000)) | |
186 | ||
1da177e4 LT |
187 | goto out; |
188 | break; | |
189 | ||
190 | case IPPROTO_ESP: | |
1a6509d9 HX |
191 | if (attrs[XFRMA_ALG_COMP]) |
192 | goto out; | |
193 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 194 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
195 | !attrs[XFRMA_ALG_CRYPT] && |
196 | !attrs[XFRMA_ALG_AEAD]) | |
197 | goto out; | |
198 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 199 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
200 | attrs[XFRMA_ALG_CRYPT]) && |
201 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 | 202 | goto out; |
35d2856b MW |
203 | if (attrs[XFRMA_TFCPAD] && |
204 | p->mode != XFRM_MODE_TUNNEL) | |
205 | goto out; | |
1da177e4 LT |
206 | break; |
207 | ||
208 | case IPPROTO_COMP: | |
35a7aa08 | 209 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 210 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 211 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 212 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35d2856b MW |
213 | attrs[XFRMA_ALG_CRYPT] || |
214 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
215 | goto out; |
216 | break; | |
217 | ||
dfd56b8b | 218 | #if IS_ENABLED(CONFIG_IPV6) |
e23c7194 MN |
219 | case IPPROTO_DSTOPTS: |
220 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
221 | if (attrs[XFRMA_ALG_COMP] || |
222 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 223 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 224 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
225 | attrs[XFRMA_ALG_CRYPT] || |
226 | attrs[XFRMA_ENCAP] || | |
227 | attrs[XFRMA_SEC_CTX] || | |
35d2856b | 228 | attrs[XFRMA_TFCPAD] || |
35a7aa08 | 229 | !attrs[XFRMA_COADDR]) |
e23c7194 MN |
230 | goto out; |
231 | break; | |
232 | #endif | |
233 | ||
1da177e4 LT |
234 | default: |
235 | goto out; | |
3ff50b79 | 236 | } |
1da177e4 | 237 | |
1a6509d9 HX |
238 | if ((err = verify_aead(attrs))) |
239 | goto out; | |
4447bb33 MW |
240 | if ((err = verify_auth_trunc(attrs))) |
241 | goto out; | |
35a7aa08 | 242 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 243 | goto out; |
35a7aa08 | 244 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 245 | goto out; |
35a7aa08 | 246 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 247 | goto out; |
35a7aa08 | 248 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 249 | goto out; |
d8647b79 SK |
250 | if ((err = verify_replay(p, attrs))) |
251 | goto out; | |
1da177e4 LT |
252 | |
253 | err = -EINVAL; | |
254 | switch (p->mode) { | |
7e49e6de MN |
255 | case XFRM_MODE_TRANSPORT: |
256 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 257 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 258 | case XFRM_MODE_BEET: |
1da177e4 LT |
259 | break; |
260 | ||
261 | default: | |
262 | goto out; | |
3ff50b79 | 263 | } |
1da177e4 LT |
264 | |
265 | err = 0; | |
266 | ||
267 | out: | |
268 | return err; | |
269 | } | |
270 | ||
271 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
6f2f19ed | 272 | struct xfrm_algo_desc *(*get_byname)(const char *, int), |
5424f32e | 273 | struct nlattr *rta) |
1da177e4 | 274 | { |
1da177e4 LT |
275 | struct xfrm_algo *p, *ualg; |
276 | struct xfrm_algo_desc *algo; | |
277 | ||
278 | if (!rta) | |
279 | return 0; | |
280 | ||
5424f32e | 281 | ualg = nla_data(rta); |
1da177e4 LT |
282 | |
283 | algo = get_byname(ualg->alg_name, 1); | |
284 | if (!algo) | |
285 | return -ENOSYS; | |
286 | *props = algo->desc.sadb_alg_id; | |
287 | ||
0f99be0d | 288 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
289 | if (!p) |
290 | return -ENOMEM; | |
291 | ||
04ff1260 | 292 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
293 | *algpp = p; |
294 | return 0; | |
295 | } | |
296 | ||
4447bb33 MW |
297 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
298 | struct nlattr *rta) | |
299 | { | |
300 | struct xfrm_algo *ualg; | |
301 | struct xfrm_algo_auth *p; | |
302 | struct xfrm_algo_desc *algo; | |
303 | ||
304 | if (!rta) | |
305 | return 0; | |
306 | ||
307 | ualg = nla_data(rta); | |
308 | ||
309 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
310 | if (!algo) | |
311 | return -ENOSYS; | |
312 | *props = algo->desc.sadb_alg_id; | |
313 | ||
314 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
315 | if (!p) | |
316 | return -ENOMEM; | |
317 | ||
318 | strcpy(p->alg_name, algo->name); | |
319 | p->alg_key_len = ualg->alg_key_len; | |
320 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
321 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
322 | ||
323 | *algpp = p; | |
324 | return 0; | |
325 | } | |
326 | ||
327 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
328 | struct nlattr *rta) | |
329 | { | |
330 | struct xfrm_algo_auth *p, *ualg; | |
331 | struct xfrm_algo_desc *algo; | |
332 | ||
333 | if (!rta) | |
334 | return 0; | |
335 | ||
336 | ualg = nla_data(rta); | |
337 | ||
338 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
339 | if (!algo) | |
340 | return -ENOSYS; | |
fa6dd8a2 ND |
341 | if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN || |
342 | ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) | |
4447bb33 MW |
343 | return -EINVAL; |
344 | *props = algo->desc.sadb_alg_id; | |
345 | ||
346 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
347 | if (!p) | |
348 | return -ENOMEM; | |
349 | ||
350 | strcpy(p->alg_name, algo->name); | |
351 | if (!p->alg_trunc_len) | |
352 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
353 | ||
354 | *algpp = p; | |
355 | return 0; | |
356 | } | |
357 | ||
1a6509d9 HX |
358 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
359 | struct nlattr *rta) | |
360 | { | |
361 | struct xfrm_algo_aead *p, *ualg; | |
362 | struct xfrm_algo_desc *algo; | |
363 | ||
364 | if (!rta) | |
365 | return 0; | |
366 | ||
367 | ualg = nla_data(rta); | |
368 | ||
369 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
370 | if (!algo) | |
371 | return -ENOSYS; | |
372 | *props = algo->desc.sadb_alg_id; | |
373 | ||
374 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
375 | if (!p) | |
376 | return -ENOMEM; | |
377 | ||
378 | strcpy(p->alg_name, algo->name); | |
379 | *algpp = p; | |
380 | return 0; | |
381 | } | |
382 | ||
e2b19125 SK |
383 | static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, |
384 | struct nlattr *rp) | |
385 | { | |
386 | struct xfrm_replay_state_esn *up; | |
ecd79187 | 387 | int ulen; |
e2b19125 SK |
388 | |
389 | if (!replay_esn || !rp) | |
390 | return 0; | |
391 | ||
392 | up = nla_data(rp); | |
ecd79187 | 393 | ulen = xfrm_replay_state_esn_len(up); |
e2b19125 | 394 | |
ecd79187 | 395 | if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen) |
e2b19125 SK |
396 | return -EINVAL; |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
d8647b79 SK |
401 | static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, |
402 | struct xfrm_replay_state_esn **preplay_esn, | |
403 | struct nlattr *rta) | |
404 | { | |
405 | struct xfrm_replay_state_esn *p, *pp, *up; | |
ecd79187 | 406 | int klen, ulen; |
d8647b79 SK |
407 | |
408 | if (!rta) | |
409 | return 0; | |
410 | ||
411 | up = nla_data(rta); | |
ecd79187 MK |
412 | klen = xfrm_replay_state_esn_len(up); |
413 | ulen = nla_len(rta) >= klen ? klen : sizeof(*up); | |
d8647b79 | 414 | |
ecd79187 | 415 | p = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
416 | if (!p) |
417 | return -ENOMEM; | |
418 | ||
ecd79187 | 419 | pp = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
420 | if (!pp) { |
421 | kfree(p); | |
422 | return -ENOMEM; | |
423 | } | |
424 | ||
ecd79187 MK |
425 | memcpy(p, up, ulen); |
426 | memcpy(pp, up, ulen); | |
427 | ||
d8647b79 SK |
428 | *replay_esn = p; |
429 | *preplay_esn = pp; | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
661697f7 | 434 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 435 | { |
df71837d TJ |
436 | int len = 0; |
437 | ||
438 | if (xfrm_ctx) { | |
439 | len += sizeof(struct xfrm_user_sec_ctx); | |
440 | len += xfrm_ctx->ctx_len; | |
441 | } | |
442 | return len; | |
443 | } | |
444 | ||
1da177e4 LT |
445 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
446 | { | |
447 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
448 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
449 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
450 | x->props.mode = p->mode; | |
33fce60d FD |
451 | x->props.replay_window = min_t(unsigned int, p->replay_window, |
452 | sizeof(x->replay.bitmap) * 8); | |
1da177e4 LT |
453 | x->props.reqid = p->reqid; |
454 | x->props.family = p->family; | |
54489c14 | 455 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 456 | x->props.flags = p->flags; |
196b0036 | 457 | |
ccf9b3b8 | 458 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 459 | x->sel.family = p->family; |
1da177e4 LT |
460 | } |
461 | ||
d51d081d JHS |
462 | /* |
463 | * someday when pfkey also has support, we could have the code | |
464 | * somehow made shareable and move it to xfrm_state.c - JHS | |
465 | * | |
466 | */ | |
e3ac104d MK |
467 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, |
468 | int update_esn) | |
d51d081d | 469 | { |
5424f32e | 470 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
e3ac104d | 471 | struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; |
5424f32e TG |
472 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
473 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
474 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 475 | |
d8647b79 SK |
476 | if (re) { |
477 | struct xfrm_replay_state_esn *replay_esn; | |
478 | replay_esn = nla_data(re); | |
479 | memcpy(x->replay_esn, replay_esn, | |
480 | xfrm_replay_state_esn_len(replay_esn)); | |
481 | memcpy(x->preplay_esn, replay_esn, | |
482 | xfrm_replay_state_esn_len(replay_esn)); | |
483 | } | |
484 | ||
d51d081d JHS |
485 | if (rp) { |
486 | struct xfrm_replay_state *replay; | |
5424f32e | 487 | replay = nla_data(rp); |
d51d081d JHS |
488 | memcpy(&x->replay, replay, sizeof(*replay)); |
489 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
490 | } | |
491 | ||
492 | if (lt) { | |
493 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 494 | ltime = nla_data(lt); |
d51d081d JHS |
495 | x->curlft.bytes = ltime->bytes; |
496 | x->curlft.packets = ltime->packets; | |
497 | x->curlft.add_time = ltime->add_time; | |
498 | x->curlft.use_time = ltime->use_time; | |
499 | } | |
500 | ||
cf5cb79f | 501 | if (et) |
5424f32e | 502 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 503 | |
cf5cb79f | 504 | if (rt) |
5424f32e | 505 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
506 | } |
507 | ||
fc34acd3 AD |
508 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
509 | struct xfrm_usersa_info *p, | |
5424f32e | 510 | struct nlattr **attrs, |
1da177e4 LT |
511 | int *errp) |
512 | { | |
fc34acd3 | 513 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
514 | int err = -ENOMEM; |
515 | ||
516 | if (!x) | |
517 | goto error_no_put; | |
518 | ||
519 | copy_from_user_state(x, p); | |
520 | ||
a947b0a9 ND |
521 | if (attrs[XFRMA_SA_EXTRA_FLAGS]) |
522 | x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); | |
523 | ||
1a6509d9 HX |
524 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
525 | attrs[XFRMA_ALG_AEAD]))) | |
526 | goto error; | |
4447bb33 MW |
527 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
528 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 529 | goto error; |
4447bb33 MW |
530 | if (!x->props.aalgo) { |
531 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
532 | attrs[XFRMA_ALG_AUTH]))) | |
533 | goto error; | |
534 | } | |
1da177e4 LT |
535 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
536 | xfrm_ealg_get_byname, | |
35a7aa08 | 537 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
538 | goto error; |
539 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
540 | xfrm_calg_get_byname, | |
35a7aa08 | 541 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 542 | goto error; |
fd21150a TG |
543 | |
544 | if (attrs[XFRMA_ENCAP]) { | |
545 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
546 | sizeof(*x->encap), GFP_KERNEL); | |
547 | if (x->encap == NULL) | |
548 | goto error; | |
549 | } | |
550 | ||
35d2856b MW |
551 | if (attrs[XFRMA_TFCPAD]) |
552 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); | |
553 | ||
fd21150a TG |
554 | if (attrs[XFRMA_COADDR]) { |
555 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
556 | sizeof(*x->coaddr), GFP_KERNEL); | |
557 | if (x->coaddr == NULL) | |
558 | goto error; | |
559 | } | |
560 | ||
6f26b61e JHS |
561 | xfrm_mark_get(attrs, &x->mark); |
562 | ||
a454f0cc | 563 | err = __xfrm_init_state(x, false); |
1da177e4 LT |
564 | if (err) |
565 | goto error; | |
566 | ||
fd21150a TG |
567 | if (attrs[XFRMA_SEC_CTX] && |
568 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
569 | goto error; |
570 | ||
d8647b79 SK |
571 | if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, |
572 | attrs[XFRMA_REPLAY_ESN_VAL]))) | |
573 | goto error; | |
574 | ||
1da177e4 | 575 | x->km.seq = p->seq; |
b27aeadb | 576 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 577 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 578 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d | 579 | |
9fdc4883 SK |
580 | if ((err = xfrm_init_replay(x))) |
581 | goto error; | |
d51d081d | 582 | |
9fdc4883 | 583 | /* override default values from above */ |
e3ac104d | 584 | xfrm_update_ae_params(x, attrs, 0); |
1da177e4 LT |
585 | |
586 | return x; | |
587 | ||
588 | error: | |
589 | x->km.state = XFRM_STATE_DEAD; | |
590 | xfrm_state_put(x); | |
591 | error_no_put: | |
592 | *errp = err; | |
593 | return NULL; | |
594 | } | |
595 | ||
22e70050 | 596 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 597 | struct nlattr **attrs) |
1da177e4 | 598 | { |
fc34acd3 | 599 | struct net *net = sock_net(skb->sk); |
7b67c857 | 600 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
601 | struct xfrm_state *x; |
602 | int err; | |
26b15dad | 603 | struct km_event c; |
e1760bd5 | 604 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
605 | u32 sessionid = audit_get_sessionid(current); |
606 | u32 sid; | |
1da177e4 | 607 | |
35a7aa08 | 608 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
609 | if (err) |
610 | return err; | |
611 | ||
fc34acd3 | 612 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
613 | if (!x) |
614 | return err; | |
615 | ||
26b15dad | 616 | xfrm_state_hold(x); |
1da177e4 LT |
617 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
618 | err = xfrm_state_add(x); | |
619 | else | |
620 | err = xfrm_state_update(x); | |
621 | ||
c53fa1ed | 622 | security_task_getsecid(current, &sid); |
2532386f | 623 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 624 | |
1da177e4 LT |
625 | if (err < 0) { |
626 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 627 | __xfrm_state_put(x); |
7d6dfe1f | 628 | goto out; |
1da177e4 LT |
629 | } |
630 | ||
26b15dad | 631 | c.seq = nlh->nlmsg_seq; |
15e47304 | 632 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 633 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
634 | |
635 | km_state_notify(x, &c); | |
7d6dfe1f | 636 | out: |
26b15dad | 637 | xfrm_state_put(x); |
1da177e4 LT |
638 | return err; |
639 | } | |
640 | ||
fc34acd3 AD |
641 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
642 | struct xfrm_usersa_id *p, | |
5424f32e | 643 | struct nlattr **attrs, |
eb2971b6 MN |
644 | int *errp) |
645 | { | |
646 | struct xfrm_state *x = NULL; | |
6f26b61e | 647 | struct xfrm_mark m; |
eb2971b6 | 648 | int err; |
6f26b61e | 649 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
650 | |
651 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
652 | err = -ESRCH; | |
6f26b61e | 653 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
654 | } else { |
655 | xfrm_address_t *saddr = NULL; | |
656 | ||
35a7aa08 | 657 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
658 | if (!saddr) { |
659 | err = -EINVAL; | |
660 | goto out; | |
661 | } | |
662 | ||
9abbffee | 663 | err = -ESRCH; |
6f26b61e JHS |
664 | x = xfrm_state_lookup_byaddr(net, mark, |
665 | &p->daddr, saddr, | |
221df1ed | 666 | p->proto, p->family); |
eb2971b6 MN |
667 | } |
668 | ||
669 | out: | |
670 | if (!x && errp) | |
671 | *errp = err; | |
672 | return x; | |
673 | } | |
674 | ||
22e70050 | 675 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 676 | struct nlattr **attrs) |
1da177e4 | 677 | { |
fc34acd3 | 678 | struct net *net = sock_net(skb->sk); |
1da177e4 | 679 | struct xfrm_state *x; |
eb2971b6 | 680 | int err = -ESRCH; |
26b15dad | 681 | struct km_event c; |
7b67c857 | 682 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
e1760bd5 | 683 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
684 | u32 sessionid = audit_get_sessionid(current); |
685 | u32 sid; | |
1da177e4 | 686 | |
fc34acd3 | 687 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 688 | if (x == NULL) |
eb2971b6 | 689 | return err; |
1da177e4 | 690 | |
6f68dc37 | 691 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
692 | goto out; |
693 | ||
1da177e4 | 694 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
695 | err = -EPERM; |
696 | goto out; | |
1da177e4 LT |
697 | } |
698 | ||
26b15dad | 699 | err = xfrm_state_delete(x); |
161a09e7 | 700 | |
c8c05a8e CZ |
701 | if (err < 0) |
702 | goto out; | |
26b15dad JHS |
703 | |
704 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 705 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 706 | c.event = nlh->nlmsg_type; |
26b15dad | 707 | km_state_notify(x, &c); |
1da177e4 | 708 | |
c8c05a8e | 709 | out: |
c53fa1ed | 710 | security_task_getsecid(current, &sid); |
2532386f | 711 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 712 | xfrm_state_put(x); |
26b15dad | 713 | return err; |
1da177e4 LT |
714 | } |
715 | ||
716 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
717 | { | |
f778a636 | 718 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
719 | memcpy(&p->id, &x->id, sizeof(p->id)); |
720 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
721 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
722 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
723 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 724 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
725 | p->mode = x->props.mode; |
726 | p->replay_window = x->props.replay_window; | |
727 | p->reqid = x->props.reqid; | |
728 | p->family = x->props.family; | |
729 | p->flags = x->props.flags; | |
730 | p->seq = x->km.seq; | |
731 | } | |
732 | ||
733 | struct xfrm_dump_info { | |
734 | struct sk_buff *in_skb; | |
735 | struct sk_buff *out_skb; | |
736 | u32 nlmsg_seq; | |
737 | u16 nlmsg_flags; | |
1da177e4 LT |
738 | }; |
739 | ||
c0144bea TG |
740 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
741 | { | |
c0144bea TG |
742 | struct xfrm_user_sec_ctx *uctx; |
743 | struct nlattr *attr; | |
68325d3b | 744 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
745 | |
746 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
747 | if (attr == NULL) | |
748 | return -EMSGSIZE; | |
749 | ||
750 | uctx = nla_data(attr); | |
751 | uctx->exttype = XFRMA_SEC_CTX; | |
752 | uctx->len = ctx_size; | |
753 | uctx->ctx_doi = s->ctx_doi; | |
754 | uctx->ctx_alg = s->ctx_alg; | |
755 | uctx->ctx_len = s->ctx_len; | |
756 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
757 | ||
758 | return 0; | |
759 | } | |
760 | ||
4447bb33 MW |
761 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
762 | { | |
763 | struct xfrm_algo *algo; | |
764 | struct nlattr *nla; | |
765 | ||
766 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
767 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
768 | if (!nla) | |
769 | return -EMSGSIZE; | |
770 | ||
771 | algo = nla_data(nla); | |
4c87308b | 772 | strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); |
4447bb33 MW |
773 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
774 | algo->alg_key_len = auth->alg_key_len; | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
68325d3b HX |
779 | /* Don't change this without updating xfrm_sa_len! */ |
780 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
781 | struct xfrm_usersa_info *p, | |
782 | struct sk_buff *skb) | |
1da177e4 | 783 | { |
1d1e34dd | 784 | int ret = 0; |
d0fde795 | 785 | |
1d1e34dd | 786 | copy_to_user_state(x, p); |
68325d3b | 787 | |
a947b0a9 ND |
788 | if (x->props.extra_flags) { |
789 | ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, | |
790 | x->props.extra_flags); | |
791 | if (ret) | |
792 | goto out; | |
793 | } | |
794 | ||
1d1e34dd DM |
795 | if (x->coaddr) { |
796 | ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
797 | if (ret) | |
798 | goto out; | |
799 | } | |
800 | if (x->lastused) { | |
801 | ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused); | |
802 | if (ret) | |
803 | goto out; | |
804 | } | |
805 | if (x->aead) { | |
806 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
807 | if (ret) | |
808 | goto out; | |
809 | } | |
810 | if (x->aalg) { | |
811 | ret = copy_to_user_auth(x->aalg, skb); | |
812 | if (!ret) | |
813 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
814 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
815 | if (ret) | |
816 | goto out; | |
817 | } | |
818 | if (x->ealg) { | |
819 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); | |
820 | if (ret) | |
821 | goto out; | |
822 | } | |
823 | if (x->calg) { | |
824 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
825 | if (ret) | |
826 | goto out; | |
827 | } | |
828 | if (x->encap) { | |
829 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
830 | if (ret) | |
831 | goto out; | |
832 | } | |
833 | if (x->tfcpad) { | |
834 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); | |
835 | if (ret) | |
836 | goto out; | |
837 | } | |
838 | ret = xfrm_mark_put(skb, &x->mark); | |
839 | if (ret) | |
840 | goto out; | |
841 | if (x->replay_esn) { | |
842 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, | |
843 | xfrm_replay_state_esn_len(x->replay_esn), | |
844 | x->replay_esn); | |
845 | if (ret) | |
846 | goto out; | |
847 | } | |
848 | if (x->security) | |
849 | ret = copy_sec_ctx(x->security, skb); | |
850 | out: | |
851 | return ret; | |
68325d3b HX |
852 | } |
853 | ||
854 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
855 | { | |
856 | struct xfrm_dump_info *sp = ptr; | |
857 | struct sk_buff *in_skb = sp->in_skb; | |
858 | struct sk_buff *skb = sp->out_skb; | |
859 | struct xfrm_usersa_info *p; | |
860 | struct nlmsghdr *nlh; | |
861 | int err; | |
862 | ||
15e47304 | 863 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
68325d3b HX |
864 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
865 | if (nlh == NULL) | |
866 | return -EMSGSIZE; | |
867 | ||
868 | p = nlmsg_data(nlh); | |
869 | ||
870 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
871 | if (err) { |
872 | nlmsg_cancel(skb, nlh); | |
873 | return err; | |
874 | } | |
9825069d | 875 | nlmsg_end(skb, nlh); |
1da177e4 | 876 | return 0; |
1da177e4 LT |
877 | } |
878 | ||
4c563f76 TT |
879 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
880 | { | |
881 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
283bc9f3 FD |
882 | struct sock *sk = cb->skb->sk; |
883 | struct net *net = sock_net(sk); | |
884 | ||
885 | xfrm_state_walk_done(walk, net); | |
4c563f76 TT |
886 | return 0; |
887 | } | |
888 | ||
1da177e4 LT |
889 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
890 | { | |
fc34acd3 | 891 | struct net *net = sock_net(skb->sk); |
4c563f76 | 892 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
893 | struct xfrm_dump_info info; |
894 | ||
4c563f76 TT |
895 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
896 | sizeof(cb->args) - sizeof(cb->args[0])); | |
897 | ||
1da177e4 LT |
898 | info.in_skb = cb->skb; |
899 | info.out_skb = skb; | |
900 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
901 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
902 | |
903 | if (!cb->args[0]) { | |
904 | cb->args[0] = 1; | |
905 | xfrm_state_walk_init(walk, 0); | |
906 | } | |
907 | ||
fc34acd3 | 908 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
909 | |
910 | return skb->len; | |
911 | } | |
912 | ||
913 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
914 | struct xfrm_state *x, u32 seq) | |
915 | { | |
916 | struct xfrm_dump_info info; | |
917 | struct sk_buff *skb; | |
864745d2 | 918 | int err; |
1da177e4 | 919 | |
7deb2264 | 920 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
921 | if (!skb) |
922 | return ERR_PTR(-ENOMEM); | |
923 | ||
1da177e4 LT |
924 | info.in_skb = in_skb; |
925 | info.out_skb = skb; | |
926 | info.nlmsg_seq = seq; | |
927 | info.nlmsg_flags = 0; | |
1da177e4 | 928 | |
864745d2 MK |
929 | err = dump_one_state(x, 0, &info); |
930 | if (err) { | |
1da177e4 | 931 | kfree_skb(skb); |
864745d2 | 932 | return ERR_PTR(err); |
1da177e4 LT |
933 | } |
934 | ||
935 | return skb; | |
936 | } | |
937 | ||
7deb2264 TG |
938 | static inline size_t xfrm_spdinfo_msgsize(void) |
939 | { | |
940 | return NLMSG_ALIGN(4) | |
941 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
942 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
943 | } | |
944 | ||
e071041b | 945 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 946 | u32 portid, u32 seq, u32 flags) |
ecfd6b18 | 947 | { |
5a6d3416 JHS |
948 | struct xfrmk_spdinfo si; |
949 | struct xfrmu_spdinfo spc; | |
950 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 | 951 | struct nlmsghdr *nlh; |
1d1e34dd | 952 | int err; |
ecfd6b18 JHS |
953 | u32 *f; |
954 | ||
15e47304 | 955 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
25985edc | 956 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
957 | return -EMSGSIZE; |
958 | ||
959 | f = nlmsg_data(nlh); | |
960 | *f = flags; | |
e071041b | 961 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
962 | spc.incnt = si.incnt; |
963 | spc.outcnt = si.outcnt; | |
964 | spc.fwdcnt = si.fwdcnt; | |
965 | spc.inscnt = si.inscnt; | |
966 | spc.outscnt = si.outscnt; | |
967 | spc.fwdscnt = si.fwdscnt; | |
968 | sph.spdhcnt = si.spdhcnt; | |
969 | sph.spdhmcnt = si.spdhmcnt; | |
970 | ||
1d1e34dd DM |
971 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
972 | if (!err) | |
973 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
974 | if (err) { | |
975 | nlmsg_cancel(skb, nlh); | |
976 | return err; | |
977 | } | |
ecfd6b18 JHS |
978 | |
979 | return nlmsg_end(skb, nlh); | |
ecfd6b18 JHS |
980 | } |
981 | ||
982 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 983 | struct nlattr **attrs) |
ecfd6b18 | 984 | { |
a6483b79 | 985 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 986 | struct sk_buff *r_skb; |
7b67c857 | 987 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 988 | u32 sportid = NETLINK_CB(skb).portid; |
ecfd6b18 | 989 | u32 seq = nlh->nlmsg_seq; |
ecfd6b18 | 990 | |
7deb2264 | 991 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
992 | if (r_skb == NULL) |
993 | return -ENOMEM; | |
994 | ||
15e47304 | 995 | if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) |
ecfd6b18 JHS |
996 | BUG(); |
997 | ||
15e47304 | 998 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
ecfd6b18 JHS |
999 | } |
1000 | ||
7deb2264 TG |
1001 | static inline size_t xfrm_sadinfo_msgsize(void) |
1002 | { | |
1003 | return NLMSG_ALIGN(4) | |
1004 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
1005 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
1006 | } | |
1007 | ||
e071041b | 1008 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 1009 | u32 portid, u32 seq, u32 flags) |
28d8909b | 1010 | { |
af11e316 JHS |
1011 | struct xfrmk_sadinfo si; |
1012 | struct xfrmu_sadhinfo sh; | |
28d8909b | 1013 | struct nlmsghdr *nlh; |
1d1e34dd | 1014 | int err; |
28d8909b JHS |
1015 | u32 *f; |
1016 | ||
15e47304 | 1017 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
25985edc | 1018 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
1019 | return -EMSGSIZE; |
1020 | ||
1021 | f = nlmsg_data(nlh); | |
1022 | *f = flags; | |
e071041b | 1023 | xfrm_sad_getinfo(net, &si); |
28d8909b | 1024 | |
af11e316 JHS |
1025 | sh.sadhmcnt = si.sadhmcnt; |
1026 | sh.sadhcnt = si.sadhcnt; | |
1027 | ||
1d1e34dd DM |
1028 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
1029 | if (!err) | |
1030 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
1031 | if (err) { | |
1032 | nlmsg_cancel(skb, nlh); | |
1033 | return err; | |
1034 | } | |
28d8909b JHS |
1035 | |
1036 | return nlmsg_end(skb, nlh); | |
28d8909b JHS |
1037 | } |
1038 | ||
1039 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1040 | struct nlattr **attrs) |
28d8909b | 1041 | { |
a6483b79 | 1042 | struct net *net = sock_net(skb->sk); |
28d8909b | 1043 | struct sk_buff *r_skb; |
7b67c857 | 1044 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1045 | u32 sportid = NETLINK_CB(skb).portid; |
28d8909b | 1046 | u32 seq = nlh->nlmsg_seq; |
28d8909b | 1047 | |
7deb2264 | 1048 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1049 | if (r_skb == NULL) |
1050 | return -ENOMEM; | |
1051 | ||
15e47304 | 1052 | if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) |
28d8909b JHS |
1053 | BUG(); |
1054 | ||
15e47304 | 1055 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
28d8909b JHS |
1056 | } |
1057 | ||
22e70050 | 1058 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1059 | struct nlattr **attrs) |
1da177e4 | 1060 | { |
fc34acd3 | 1061 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1062 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1063 | struct xfrm_state *x; |
1064 | struct sk_buff *resp_skb; | |
eb2971b6 | 1065 | int err = -ESRCH; |
1da177e4 | 1066 | |
fc34acd3 | 1067 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1068 | if (x == NULL) |
1069 | goto out_noput; | |
1070 | ||
1071 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1072 | if (IS_ERR(resp_skb)) { | |
1073 | err = PTR_ERR(resp_skb); | |
1074 | } else { | |
15e47304 | 1075 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1076 | } |
1077 | xfrm_state_put(x); | |
1078 | out_noput: | |
1079 | return err; | |
1080 | } | |
1081 | ||
22e70050 | 1082 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1083 | struct nlattr **attrs) |
1da177e4 | 1084 | { |
fc34acd3 | 1085 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1086 | struct xfrm_state *x; |
1087 | struct xfrm_userspi_info *p; | |
1088 | struct sk_buff *resp_skb; | |
1089 | xfrm_address_t *daddr; | |
1090 | int family; | |
1091 | int err; | |
6f26b61e JHS |
1092 | u32 mark; |
1093 | struct xfrm_mark m; | |
1da177e4 | 1094 | |
7b67c857 | 1095 | p = nlmsg_data(nlh); |
776e9dd9 | 1096 | err = verify_spi_info(p->info.id.proto, p->min, p->max); |
1da177e4 LT |
1097 | if (err) |
1098 | goto out_noput; | |
1099 | ||
1100 | family = p->info.family; | |
1101 | daddr = &p->info.id.daddr; | |
1102 | ||
1103 | x = NULL; | |
6f26b61e JHS |
1104 | |
1105 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1106 | if (p->info.seq) { |
6f26b61e | 1107 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
70e94e66 | 1108 | if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { |
1da177e4 LT |
1109 | xfrm_state_put(x); |
1110 | x = NULL; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | if (!x) | |
6f26b61e | 1115 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1116 | p->info.id.proto, daddr, |
1117 | &p->info.saddr, 1, | |
1118 | family); | |
1119 | err = -ENOENT; | |
1120 | if (x == NULL) | |
1121 | goto out_noput; | |
1122 | ||
658b219e HX |
1123 | err = xfrm_alloc_spi(x, p->min, p->max); |
1124 | if (err) | |
1125 | goto out; | |
1da177e4 | 1126 | |
658b219e | 1127 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1128 | if (IS_ERR(resp_skb)) { |
1129 | err = PTR_ERR(resp_skb); | |
1130 | goto out; | |
1131 | } | |
1132 | ||
15e47304 | 1133 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1134 | |
1135 | out: | |
1136 | xfrm_state_put(x); | |
1137 | out_noput: | |
1138 | return err; | |
1139 | } | |
1140 | ||
b798a9ed | 1141 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1142 | { |
1143 | switch (dir) { | |
1144 | case XFRM_POLICY_IN: | |
1145 | case XFRM_POLICY_OUT: | |
1146 | case XFRM_POLICY_FWD: | |
1147 | break; | |
1148 | ||
1149 | default: | |
1150 | return -EINVAL; | |
3ff50b79 | 1151 | } |
1da177e4 LT |
1152 | |
1153 | return 0; | |
1154 | } | |
1155 | ||
b798a9ed | 1156 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1157 | { |
1158 | switch (type) { | |
1159 | case XFRM_POLICY_TYPE_MAIN: | |
1160 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1161 | case XFRM_POLICY_TYPE_SUB: | |
1162 | #endif | |
1163 | break; | |
1164 | ||
1165 | default: | |
1166 | return -EINVAL; | |
3ff50b79 | 1167 | } |
f7b6983f MN |
1168 | |
1169 | return 0; | |
1170 | } | |
1171 | ||
1da177e4 LT |
1172 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1173 | { | |
e682adf0 FD |
1174 | int ret; |
1175 | ||
1da177e4 LT |
1176 | switch (p->share) { |
1177 | case XFRM_SHARE_ANY: | |
1178 | case XFRM_SHARE_SESSION: | |
1179 | case XFRM_SHARE_USER: | |
1180 | case XFRM_SHARE_UNIQUE: | |
1181 | break; | |
1182 | ||
1183 | default: | |
1184 | return -EINVAL; | |
3ff50b79 | 1185 | } |
1da177e4 LT |
1186 | |
1187 | switch (p->action) { | |
1188 | case XFRM_POLICY_ALLOW: | |
1189 | case XFRM_POLICY_BLOCK: | |
1190 | break; | |
1191 | ||
1192 | default: | |
1193 | return -EINVAL; | |
3ff50b79 | 1194 | } |
1da177e4 LT |
1195 | |
1196 | switch (p->sel.family) { | |
1197 | case AF_INET: | |
1198 | break; | |
1199 | ||
1200 | case AF_INET6: | |
dfd56b8b | 1201 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1202 | break; |
1203 | #else | |
1204 | return -EAFNOSUPPORT; | |
1205 | #endif | |
1206 | ||
1207 | default: | |
1208 | return -EINVAL; | |
3ff50b79 | 1209 | } |
1da177e4 | 1210 | |
e682adf0 FD |
1211 | ret = verify_policy_dir(p->dir); |
1212 | if (ret) | |
1213 | return ret; | |
1214 | if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir)) | |
1215 | return -EINVAL; | |
1216 | ||
1217 | return 0; | |
1da177e4 LT |
1218 | } |
1219 | ||
5424f32e | 1220 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1221 | { |
5424f32e | 1222 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1223 | struct xfrm_user_sec_ctx *uctx; |
1224 | ||
1225 | if (!rt) | |
1226 | return 0; | |
1227 | ||
5424f32e | 1228 | uctx = nla_data(rt); |
03e1ad7b | 1229 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1230 | } |
1231 | ||
1da177e4 LT |
1232 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1233 | int nr) | |
1234 | { | |
1235 | int i; | |
1236 | ||
1237 | xp->xfrm_nr = nr; | |
1238 | for (i = 0; i < nr; i++, ut++) { | |
1239 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1240 | ||
1241 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1242 | memcpy(&t->saddr, &ut->saddr, | |
1243 | sizeof(xfrm_address_t)); | |
1244 | t->reqid = ut->reqid; | |
1245 | t->mode = ut->mode; | |
1246 | t->share = ut->share; | |
1247 | t->optional = ut->optional; | |
1248 | t->aalgos = ut->aalgos; | |
1249 | t->ealgos = ut->ealgos; | |
1250 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1251 | /* If all masks are ~0, then we allow all algorithms. */ |
1252 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1253 | t->encap_family = ut->family; |
1da177e4 LT |
1254 | } |
1255 | } | |
1256 | ||
b4ad86bf DM |
1257 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1258 | { | |
1259 | int i; | |
1260 | ||
1261 | if (nr > XFRM_MAX_DEPTH) | |
1262 | return -EINVAL; | |
1263 | ||
1264 | for (i = 0; i < nr; i++) { | |
1265 | /* We never validated the ut->family value, so many | |
1266 | * applications simply leave it at zero. The check was | |
1267 | * never made and ut->family was ignored because all | |
1268 | * templates could be assumed to have the same family as | |
1269 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1270 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1271 | */ | |
1272 | if (!ut[i].family) | |
1273 | ut[i].family = family; | |
1274 | ||
1275 | switch (ut[i].family) { | |
1276 | case AF_INET: | |
1277 | break; | |
dfd56b8b | 1278 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1279 | case AF_INET6: |
1280 | break; | |
1281 | #endif | |
1282 | default: | |
1283 | return -EINVAL; | |
3ff50b79 | 1284 | } |
b4ad86bf DM |
1285 | } |
1286 | ||
1287 | return 0; | |
1288 | } | |
1289 | ||
5424f32e | 1290 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1291 | { |
5424f32e | 1292 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1293 | |
1294 | if (!rt) { | |
1295 | pol->xfrm_nr = 0; | |
1296 | } else { | |
5424f32e TG |
1297 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1298 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1299 | int err; |
1da177e4 | 1300 | |
b4ad86bf DM |
1301 | err = validate_tmpl(nr, utmpl, pol->family); |
1302 | if (err) | |
1303 | return err; | |
1da177e4 | 1304 | |
5424f32e | 1305 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1306 | } |
1307 | return 0; | |
1308 | } | |
1309 | ||
5424f32e | 1310 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1311 | { |
5424f32e | 1312 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1313 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1314 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1315 | int err; |
1316 | ||
1317 | if (rt) { | |
5424f32e | 1318 | upt = nla_data(rt); |
f7b6983f MN |
1319 | type = upt->type; |
1320 | } | |
1321 | ||
1322 | err = verify_policy_type(type); | |
1323 | if (err) | |
1324 | return err; | |
1325 | ||
1326 | *tp = type; | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1da177e4 LT |
1330 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1331 | { | |
1332 | xp->priority = p->priority; | |
1333 | xp->index = p->index; | |
1334 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1335 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1336 | xp->action = p->action; | |
1337 | xp->flags = p->flags; | |
1338 | xp->family = p->sel.family; | |
1339 | /* XXX xp->share = p->share; */ | |
1340 | } | |
1341 | ||
1342 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1343 | { | |
7b789836 | 1344 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
1345 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
1346 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1347 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1348 | p->priority = xp->priority; | |
1349 | p->index = xp->index; | |
1350 | p->sel.family = xp->family; | |
1351 | p->dir = dir; | |
1352 | p->action = xp->action; | |
1353 | p->flags = xp->flags; | |
1354 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1355 | } | |
1356 | ||
fc34acd3 | 1357 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1358 | { |
fc34acd3 | 1359 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1360 | int err; |
1361 | ||
1362 | if (!xp) { | |
1363 | *errp = -ENOMEM; | |
1364 | return NULL; | |
1365 | } | |
1366 | ||
1367 | copy_from_user_policy(xp, p); | |
df71837d | 1368 | |
35a7aa08 | 1369 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1370 | if (err) |
1371 | goto error; | |
1372 | ||
35a7aa08 TG |
1373 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1374 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1375 | if (err) |
1376 | goto error; | |
1da177e4 | 1377 | |
295fae56 JHS |
1378 | xfrm_mark_get(attrs, &xp->mark); |
1379 | ||
1da177e4 | 1380 | return xp; |
f7b6983f MN |
1381 | error: |
1382 | *errp = err; | |
12a169e7 | 1383 | xp->walk.dead = 1; |
64c31b3f | 1384 | xfrm_policy_destroy(xp); |
f7b6983f | 1385 | return NULL; |
1da177e4 LT |
1386 | } |
1387 | ||
22e70050 | 1388 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1389 | struct nlattr **attrs) |
1da177e4 | 1390 | { |
fc34acd3 | 1391 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1392 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1393 | struct xfrm_policy *xp; |
26b15dad | 1394 | struct km_event c; |
1da177e4 LT |
1395 | int err; |
1396 | int excl; | |
e1760bd5 | 1397 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
1398 | u32 sessionid = audit_get_sessionid(current); |
1399 | u32 sid; | |
1da177e4 LT |
1400 | |
1401 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1402 | if (err) |
1403 | return err; | |
35a7aa08 | 1404 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1405 | if (err) |
1406 | return err; | |
1407 | ||
fc34acd3 | 1408 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1409 | if (!xp) |
1410 | return err; | |
1411 | ||
25985edc | 1412 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1413 | * Aha! this is anti-netlink really i.e more pfkey derived |
1414 | * in netlink excl is a flag and you wouldnt need | |
1415 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1416 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1417 | err = xfrm_policy_insert(p->dir, xp, excl); | |
c53fa1ed | 1418 | security_task_getsecid(current, &sid); |
2532386f | 1419 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1420 | |
1da177e4 | 1421 | if (err) { |
03e1ad7b | 1422 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1423 | kfree(xp); |
1424 | return err; | |
1425 | } | |
1426 | ||
f60f6b8f | 1427 | c.event = nlh->nlmsg_type; |
26b15dad | 1428 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1429 | c.portid = nlh->nlmsg_pid; |
26b15dad JHS |
1430 | km_policy_notify(xp, p->dir, &c); |
1431 | ||
1da177e4 LT |
1432 | xfrm_pol_put(xp); |
1433 | ||
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1438 | { | |
1439 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1440 | int i; | |
1441 | ||
1442 | if (xp->xfrm_nr == 0) | |
1443 | return 0; | |
1444 | ||
1445 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1446 | struct xfrm_user_tmpl *up = &vec[i]; | |
1447 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1448 | ||
1f86840f | 1449 | memset(up, 0, sizeof(*up)); |
1da177e4 | 1450 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
8511d01d | 1451 | up->family = kp->encap_family; |
1da177e4 LT |
1452 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1453 | up->reqid = kp->reqid; | |
1454 | up->mode = kp->mode; | |
1455 | up->share = kp->share; | |
1456 | up->optional = kp->optional; | |
1457 | up->aalgos = kp->aalgos; | |
1458 | up->ealgos = kp->ealgos; | |
1459 | up->calgos = kp->calgos; | |
1460 | } | |
df71837d | 1461 | |
c0144bea TG |
1462 | return nla_put(skb, XFRMA_TMPL, |
1463 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1464 | } |
1465 | ||
1466 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1467 | { | |
1468 | if (x->security) { | |
1469 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1470 | } |
1471 | return 0; | |
0d681623 | 1472 | } |
df71837d | 1473 | |
0d681623 SH |
1474 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1475 | { | |
1d1e34dd | 1476 | if (xp->security) |
0d681623 | 1477 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1478 | return 0; |
df71837d | 1479 | } |
cfbfd45a TG |
1480 | static inline size_t userpolicy_type_attrsize(void) |
1481 | { | |
1482 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1483 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1484 | #else | |
1485 | return 0; | |
1486 | #endif | |
1487 | } | |
df71837d | 1488 | |
f7b6983f | 1489 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1490 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1491 | { |
c0144bea TG |
1492 | struct xfrm_userpolicy_type upt = { |
1493 | .type = type, | |
1494 | }; | |
f7b6983f | 1495 | |
c0144bea | 1496 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1497 | } |
1498 | ||
1499 | #else | |
b798a9ed | 1500 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1501 | { |
1502 | return 0; | |
1503 | } | |
1504 | #endif | |
1505 | ||
1da177e4 LT |
1506 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1507 | { | |
1508 | struct xfrm_dump_info *sp = ptr; | |
1509 | struct xfrm_userpolicy_info *p; | |
1510 | struct sk_buff *in_skb = sp->in_skb; | |
1511 | struct sk_buff *skb = sp->out_skb; | |
1512 | struct nlmsghdr *nlh; | |
1d1e34dd | 1513 | int err; |
1da177e4 | 1514 | |
15e47304 | 1515 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
79b8b7f4 TG |
1516 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
1517 | if (nlh == NULL) | |
1518 | return -EMSGSIZE; | |
1da177e4 | 1519 | |
7b67c857 | 1520 | p = nlmsg_data(nlh); |
1da177e4 | 1521 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1522 | err = copy_to_user_tmpl(xp, skb); |
1523 | if (!err) | |
1524 | err = copy_to_user_sec_ctx(xp, skb); | |
1525 | if (!err) | |
1526 | err = copy_to_user_policy_type(xp->type, skb); | |
1527 | if (!err) | |
1528 | err = xfrm_mark_put(skb, &xp->mark); | |
1529 | if (err) { | |
1530 | nlmsg_cancel(skb, nlh); | |
1531 | return err; | |
1532 | } | |
9825069d | 1533 | nlmsg_end(skb, nlh); |
1da177e4 | 1534 | return 0; |
1da177e4 LT |
1535 | } |
1536 | ||
4c563f76 TT |
1537 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1538 | { | |
1539 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
283bc9f3 | 1540 | struct net *net = sock_net(cb->skb->sk); |
4c563f76 | 1541 | |
283bc9f3 | 1542 | xfrm_policy_walk_done(walk, net); |
4c563f76 TT |
1543 | return 0; |
1544 | } | |
1545 | ||
1da177e4 LT |
1546 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1547 | { | |
fc34acd3 | 1548 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1549 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1550 | struct xfrm_dump_info info; |
1551 | ||
4c563f76 TT |
1552 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1553 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1554 | ||
1da177e4 LT |
1555 | info.in_skb = cb->skb; |
1556 | info.out_skb = skb; | |
1557 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1558 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1559 | |
1560 | if (!cb->args[0]) { | |
1561 | cb->args[0] = 1; | |
1562 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1563 | } | |
1564 | ||
fc34acd3 | 1565 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1566 | |
1567 | return skb->len; | |
1568 | } | |
1569 | ||
1570 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1571 | struct xfrm_policy *xp, | |
1572 | int dir, u32 seq) | |
1573 | { | |
1574 | struct xfrm_dump_info info; | |
1575 | struct sk_buff *skb; | |
c2546372 | 1576 | int err; |
1da177e4 | 1577 | |
7deb2264 | 1578 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1579 | if (!skb) |
1580 | return ERR_PTR(-ENOMEM); | |
1581 | ||
1da177e4 LT |
1582 | info.in_skb = in_skb; |
1583 | info.out_skb = skb; | |
1584 | info.nlmsg_seq = seq; | |
1585 | info.nlmsg_flags = 0; | |
1da177e4 | 1586 | |
c2546372 MK |
1587 | err = dump_one_policy(xp, dir, 0, &info); |
1588 | if (err) { | |
1da177e4 | 1589 | kfree_skb(skb); |
c2546372 | 1590 | return ERR_PTR(err); |
1da177e4 LT |
1591 | } |
1592 | ||
1593 | return skb; | |
1594 | } | |
1595 | ||
22e70050 | 1596 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1597 | struct nlattr **attrs) |
1da177e4 | 1598 | { |
fc34acd3 | 1599 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1600 | struct xfrm_policy *xp; |
1601 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1602 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1603 | int err; |
26b15dad | 1604 | struct km_event c; |
1da177e4 | 1605 | int delete; |
295fae56 JHS |
1606 | struct xfrm_mark m; |
1607 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1608 | |
7b67c857 | 1609 | p = nlmsg_data(nlh); |
1da177e4 LT |
1610 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1611 | ||
35a7aa08 | 1612 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1613 | if (err) |
1614 | return err; | |
1615 | ||
1da177e4 LT |
1616 | err = verify_policy_dir(p->dir); |
1617 | if (err) | |
1618 | return err; | |
1619 | ||
1620 | if (p->index) | |
295fae56 | 1621 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1622 | else { |
5424f32e | 1623 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1624 | struct xfrm_sec_ctx *ctx; |
df71837d | 1625 | |
35a7aa08 | 1626 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1627 | if (err) |
1628 | return err; | |
1629 | ||
2c8dd116 | 1630 | ctx = NULL; |
df71837d | 1631 | if (rt) { |
5424f32e | 1632 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1633 | |
03e1ad7b PM |
1634 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1635 | if (err) | |
df71837d | 1636 | return err; |
2c8dd116 | 1637 | } |
295fae56 | 1638 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1639 | ctx, delete, &err); |
03e1ad7b | 1640 | security_xfrm_policy_free(ctx); |
df71837d | 1641 | } |
1da177e4 LT |
1642 | if (xp == NULL) |
1643 | return -ENOENT; | |
1644 | ||
1645 | if (!delete) { | |
1646 | struct sk_buff *resp_skb; | |
1647 | ||
1648 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1649 | if (IS_ERR(resp_skb)) { | |
1650 | err = PTR_ERR(resp_skb); | |
1651 | } else { | |
a6483b79 | 1652 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
15e47304 | 1653 | NETLINK_CB(skb).portid); |
1da177e4 | 1654 | } |
26b15dad | 1655 | } else { |
e1760bd5 | 1656 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
1657 | u32 sessionid = audit_get_sessionid(current); |
1658 | u32 sid; | |
2532386f | 1659 | |
c53fa1ed | 1660 | security_task_getsecid(current, &sid); |
2532386f EP |
1661 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, |
1662 | sid); | |
13fcfbb0 DM |
1663 | |
1664 | if (err != 0) | |
c8c05a8e | 1665 | goto out; |
13fcfbb0 | 1666 | |
e7443892 | 1667 | c.data.byid = p->index; |
f60f6b8f | 1668 | c.event = nlh->nlmsg_type; |
26b15dad | 1669 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1670 | c.portid = nlh->nlmsg_pid; |
26b15dad | 1671 | km_policy_notify(xp, p->dir, &c); |
1da177e4 LT |
1672 | } |
1673 | ||
c8c05a8e | 1674 | out: |
ef41aaa0 | 1675 | xfrm_pol_put(xp); |
e4c17216 PM |
1676 | if (delete && err == 0) |
1677 | xfrm_garbage_collect(net); | |
1da177e4 LT |
1678 | return err; |
1679 | } | |
1680 | ||
22e70050 | 1681 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1682 | struct nlattr **attrs) |
1da177e4 | 1683 | { |
fc34acd3 | 1684 | struct net *net = sock_net(skb->sk); |
26b15dad | 1685 | struct km_event c; |
7b67c857 | 1686 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1687 | struct xfrm_audit audit_info; |
4aa2e62c | 1688 | int err; |
1da177e4 | 1689 | |
c53fa1ed PM |
1690 | audit_info.loginuid = audit_get_loginuid(current); |
1691 | audit_info.sessionid = audit_get_sessionid(current); | |
1692 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1693 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1694 | if (err) { |
1695 | if (err == -ESRCH) /* empty table */ | |
1696 | return 0; | |
069c474e | 1697 | return err; |
9e64cc95 | 1698 | } |
bf08867f | 1699 | c.data.proto = p->proto; |
f60f6b8f | 1700 | c.event = nlh->nlmsg_type; |
26b15dad | 1701 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1702 | c.portid = nlh->nlmsg_pid; |
7067802e | 1703 | c.net = net; |
26b15dad JHS |
1704 | km_state_notify(NULL, &c); |
1705 | ||
1da177e4 LT |
1706 | return 0; |
1707 | } | |
1708 | ||
d8647b79 | 1709 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1710 | { |
d8647b79 SK |
1711 | size_t replay_size = x->replay_esn ? |
1712 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1713 | sizeof(struct xfrm_replay_state); | |
1714 | ||
7deb2264 | 1715 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1716 | + nla_total_size(replay_size) |
7deb2264 | 1717 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1718 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1719 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1720 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1721 | } | |
d51d081d | 1722 | |
214e005b | 1723 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1724 | { |
1725 | struct xfrm_aevent_id *id; | |
1726 | struct nlmsghdr *nlh; | |
1d1e34dd | 1727 | int err; |
d51d081d | 1728 | |
15e47304 | 1729 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
79b8b7f4 TG |
1730 | if (nlh == NULL) |
1731 | return -EMSGSIZE; | |
d51d081d | 1732 | |
7b67c857 | 1733 | id = nlmsg_data(nlh); |
9b7a787d | 1734 | memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); |
d51d081d JHS |
1735 | id->sa_id.spi = x->id.spi; |
1736 | id->sa_id.family = x->props.family; | |
1737 | id->sa_id.proto = x->id.proto; | |
9b7a787d | 1738 | memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); |
2b5f6dcc | 1739 | id->reqid = x->props.reqid; |
d51d081d JHS |
1740 | id->flags = c->data.aevent; |
1741 | ||
d0fde795 | 1742 | if (x->replay_esn) { |
1d1e34dd DM |
1743 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1744 | xfrm_replay_state_esn_len(x->replay_esn), | |
1745 | x->replay_esn); | |
d0fde795 | 1746 | } else { |
1d1e34dd DM |
1747 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1748 | &x->replay); | |
d0fde795 | 1749 | } |
1d1e34dd DM |
1750 | if (err) |
1751 | goto out_cancel; | |
1752 | err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
1753 | if (err) | |
1754 | goto out_cancel; | |
d51d081d | 1755 | |
1d1e34dd DM |
1756 | if (id->flags & XFRM_AE_RTHR) { |
1757 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1758 | if (err) | |
1759 | goto out_cancel; | |
1760 | } | |
1761 | if (id->flags & XFRM_AE_ETHR) { | |
1762 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1763 | x->replay_maxage * 10 / HZ); | |
1764 | if (err) | |
1765 | goto out_cancel; | |
1766 | } | |
1767 | err = xfrm_mark_put(skb, &x->mark); | |
1768 | if (err) | |
1769 | goto out_cancel; | |
6f26b61e | 1770 | |
9825069d | 1771 | return nlmsg_end(skb, nlh); |
d51d081d | 1772 | |
1d1e34dd | 1773 | out_cancel: |
9825069d | 1774 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1775 | return err; |
d51d081d JHS |
1776 | } |
1777 | ||
22e70050 | 1778 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1779 | struct nlattr **attrs) |
d51d081d | 1780 | { |
fc34acd3 | 1781 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1782 | struct xfrm_state *x; |
1783 | struct sk_buff *r_skb; | |
1784 | int err; | |
1785 | struct km_event c; | |
6f26b61e JHS |
1786 | u32 mark; |
1787 | struct xfrm_mark m; | |
7b67c857 | 1788 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1789 | struct xfrm_usersa_id *id = &p->sa_id; |
1790 | ||
6f26b61e JHS |
1791 | mark = xfrm_mark_get(attrs, &m); |
1792 | ||
1793 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1794 | if (x == NULL) |
d51d081d | 1795 | return -ESRCH; |
d8647b79 SK |
1796 | |
1797 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1798 | if (r_skb == NULL) { | |
1799 | xfrm_state_put(x); | |
1800 | return -ENOMEM; | |
d51d081d JHS |
1801 | } |
1802 | ||
1803 | /* | |
1804 | * XXX: is this lock really needed - none of the other | |
1805 | * gets lock (the concern is things getting updated | |
1806 | * while we are still reading) - jhs | |
1807 | */ | |
1808 | spin_lock_bh(&x->lock); | |
1809 | c.data.aevent = p->flags; | |
1810 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1811 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1812 | |
1813 | if (build_aevent(r_skb, x, &c) < 0) | |
1814 | BUG(); | |
15e47304 | 1815 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); |
d51d081d JHS |
1816 | spin_unlock_bh(&x->lock); |
1817 | xfrm_state_put(x); | |
1818 | return err; | |
1819 | } | |
1820 | ||
22e70050 | 1821 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1822 | struct nlattr **attrs) |
d51d081d | 1823 | { |
fc34acd3 | 1824 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1825 | struct xfrm_state *x; |
1826 | struct km_event c; | |
1827 | int err = - EINVAL; | |
6f26b61e JHS |
1828 | u32 mark = 0; |
1829 | struct xfrm_mark m; | |
7b67c857 | 1830 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1831 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1832 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1833 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1834 | |
d8647b79 | 1835 | if (!lt && !rp && !re) |
d51d081d JHS |
1836 | return err; |
1837 | ||
1838 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1839 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1840 | return err; | |
1841 | ||
6f26b61e JHS |
1842 | mark = xfrm_mark_get(attrs, &m); |
1843 | ||
1844 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1845 | if (x == NULL) |
1846 | return -ESRCH; | |
1847 | ||
1848 | if (x->km.state != XFRM_STATE_VALID) | |
1849 | goto out; | |
1850 | ||
4479ff76 | 1851 | err = xfrm_replay_verify_len(x->replay_esn, re); |
e2b19125 SK |
1852 | if (err) |
1853 | goto out; | |
1854 | ||
d51d081d | 1855 | spin_lock_bh(&x->lock); |
e3ac104d | 1856 | xfrm_update_ae_params(x, attrs, 1); |
d51d081d | 1857 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1858 | |
1859 | c.event = nlh->nlmsg_type; | |
1860 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1861 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1862 | c.data.aevent = XFRM_AE_CU; |
1863 | km_state_notify(x, &c); | |
1864 | err = 0; | |
1865 | out: | |
1866 | xfrm_state_put(x); | |
1867 | return err; | |
1868 | } | |
1869 | ||
22e70050 | 1870 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1871 | struct nlattr **attrs) |
1da177e4 | 1872 | { |
fc34acd3 | 1873 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1874 | struct km_event c; |
b798a9ed | 1875 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1876 | int err; |
161a09e7 | 1877 | struct xfrm_audit audit_info; |
f7b6983f | 1878 | |
35a7aa08 | 1879 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1880 | if (err) |
1881 | return err; | |
26b15dad | 1882 | |
c53fa1ed PM |
1883 | audit_info.loginuid = audit_get_loginuid(current); |
1884 | audit_info.sessionid = audit_get_sessionid(current); | |
1885 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1886 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1887 | if (err) { |
1888 | if (err == -ESRCH) /* empty table */ | |
1889 | return 0; | |
069c474e | 1890 | return err; |
2f1eb65f JHS |
1891 | } |
1892 | ||
f7b6983f | 1893 | c.data.type = type; |
f60f6b8f | 1894 | c.event = nlh->nlmsg_type; |
26b15dad | 1895 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1896 | c.portid = nlh->nlmsg_pid; |
7067802e | 1897 | c.net = net; |
26b15dad | 1898 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1899 | return 0; |
1900 | } | |
1901 | ||
22e70050 | 1902 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1903 | struct nlattr **attrs) |
6c5c8ca7 | 1904 | { |
fc34acd3 | 1905 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1906 | struct xfrm_policy *xp; |
7b67c857 | 1907 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1908 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1909 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1910 | int err = -ENOENT; |
295fae56 JHS |
1911 | struct xfrm_mark m; |
1912 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1913 | |
35a7aa08 | 1914 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1915 | if (err) |
1916 | return err; | |
1917 | ||
c8bf4d04 TT |
1918 | err = verify_policy_dir(p->dir); |
1919 | if (err) | |
1920 | return err; | |
1921 | ||
6c5c8ca7 | 1922 | if (p->index) |
295fae56 | 1923 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1924 | else { |
5424f32e | 1925 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1926 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1927 | |
35a7aa08 | 1928 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1929 | if (err) |
1930 | return err; | |
1931 | ||
2c8dd116 | 1932 | ctx = NULL; |
6c5c8ca7 | 1933 | if (rt) { |
5424f32e | 1934 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1935 | |
03e1ad7b PM |
1936 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1937 | if (err) | |
6c5c8ca7 | 1938 | return err; |
2c8dd116 | 1939 | } |
295fae56 | 1940 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1941 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1942 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1943 | } |
6c5c8ca7 | 1944 | if (xp == NULL) |
ef41aaa0 | 1945 | return -ENOENT; |
03e1ad7b | 1946 | |
ea2dea9d | 1947 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1948 | goto out; |
6c5c8ca7 | 1949 | |
6c5c8ca7 JHS |
1950 | err = 0; |
1951 | if (up->hard) { | |
e1760bd5 | 1952 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
1953 | u32 sessionid = audit_get_sessionid(current); |
1954 | u32 sid; | |
1955 | ||
1956 | security_task_getsecid(current, &sid); | |
6c5c8ca7 | 1957 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1958 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1959 | |
6c5c8ca7 JHS |
1960 | } else { |
1961 | // reset the timers here? | |
62db5cfd | 1962 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 | 1963 | } |
c6bb8136 | 1964 | km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); |
6c5c8ca7 JHS |
1965 | |
1966 | out: | |
1967 | xfrm_pol_put(xp); | |
1968 | return err; | |
1969 | } | |
1970 | ||
22e70050 | 1971 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1972 | struct nlattr **attrs) |
53bc6b4d | 1973 | { |
fc34acd3 | 1974 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1975 | struct xfrm_state *x; |
1976 | int err; | |
7b67c857 | 1977 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1978 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 1979 | struct xfrm_mark m; |
928497f0 | 1980 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 1981 | |
6f26b61e | 1982 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1983 | |
3a765aa5 | 1984 | err = -ENOENT; |
53bc6b4d JHS |
1985 | if (x == NULL) |
1986 | return err; | |
1987 | ||
53bc6b4d | 1988 | spin_lock_bh(&x->lock); |
3a765aa5 | 1989 | err = -EINVAL; |
53bc6b4d JHS |
1990 | if (x->km.state != XFRM_STATE_VALID) |
1991 | goto out; | |
c6bb8136 | 1992 | km_state_expired(x, ue->hard, nlh->nlmsg_pid); |
53bc6b4d | 1993 | |
161a09e7 | 1994 | if (ue->hard) { |
e1760bd5 | 1995 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
1996 | u32 sessionid = audit_get_sessionid(current); |
1997 | u32 sid; | |
1998 | ||
1999 | security_task_getsecid(current, &sid); | |
53bc6b4d | 2000 | __xfrm_state_delete(x); |
2532386f | 2001 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 2002 | } |
3a765aa5 | 2003 | err = 0; |
53bc6b4d JHS |
2004 | out: |
2005 | spin_unlock_bh(&x->lock); | |
2006 | xfrm_state_put(x); | |
2007 | return err; | |
2008 | } | |
2009 | ||
22e70050 | 2010 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2011 | struct nlattr **attrs) |
980ebd25 | 2012 | { |
fc34acd3 | 2013 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
2014 | struct xfrm_policy *xp; |
2015 | struct xfrm_user_tmpl *ut; | |
2016 | int i; | |
5424f32e | 2017 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 2018 | struct xfrm_mark mark; |
980ebd25 | 2019 | |
7b67c857 | 2020 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 2021 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
2022 | int err = -ENOMEM; |
2023 | ||
2024 | if (!x) | |
d8eb9307 | 2025 | goto nomem; |
980ebd25 | 2026 | |
6f26b61e JHS |
2027 | xfrm_mark_get(attrs, &mark); |
2028 | ||
980ebd25 | 2029 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2030 | if (err) |
2031 | goto bad_policy; | |
980ebd25 JHS |
2032 | |
2033 | /* build an XP */ | |
fc34acd3 | 2034 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2035 | if (!xp) |
2036 | goto free_state; | |
980ebd25 JHS |
2037 | |
2038 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2039 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2040 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2041 | xp->mark.m = x->mark.m = mark.m; |
2042 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2043 | ut = nla_data(rt); |
980ebd25 JHS |
2044 | /* extract the templates and for each call km_key */ |
2045 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2046 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2047 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2048 | x->props.mode = t->mode; | |
2049 | x->props.reqid = t->reqid; | |
2050 | x->props.family = ut->family; | |
2051 | t->aalgos = ua->aalgos; | |
2052 | t->ealgos = ua->ealgos; | |
2053 | t->calgos = ua->calgos; | |
2054 | err = km_query(x, t, xp); | |
2055 | ||
2056 | } | |
2057 | ||
2058 | kfree(x); | |
2059 | kfree(xp); | |
2060 | ||
2061 | return 0; | |
d8eb9307 IJ |
2062 | |
2063 | bad_policy: | |
62db5cfd | 2064 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2065 | free_state: |
2066 | kfree(x); | |
2067 | nomem: | |
2068 | return err; | |
980ebd25 JHS |
2069 | } |
2070 | ||
5c79de6e | 2071 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2072 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2073 | struct xfrm_kmaddress *k, |
5424f32e | 2074 | struct nlattr **attrs, int *num) |
5c79de6e | 2075 | { |
5424f32e | 2076 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2077 | struct xfrm_user_migrate *um; |
2078 | int i, num_migrate; | |
2079 | ||
13c1d189 AE |
2080 | if (k != NULL) { |
2081 | struct xfrm_user_kmaddress *uk; | |
2082 | ||
2083 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2084 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2085 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2086 | k->family = uk->family; | |
2087 | k->reserved = uk->reserved; | |
2088 | } | |
2089 | ||
5424f32e TG |
2090 | um = nla_data(rt); |
2091 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2092 | |
2093 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2094 | return -EINVAL; | |
2095 | ||
2096 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2097 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2098 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2099 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2100 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2101 | ||
2102 | ma->proto = um->proto; | |
2103 | ma->mode = um->mode; | |
2104 | ma->reqid = um->reqid; | |
2105 | ||
2106 | ma->old_family = um->old_family; | |
2107 | ma->new_family = um->new_family; | |
2108 | } | |
2109 | ||
2110 | *num = i; | |
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2115 | struct nlattr **attrs) |
5c79de6e | 2116 | { |
7b67c857 | 2117 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2118 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2119 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2120 | u8 type; |
2121 | int err; | |
2122 | int n = 0; | |
8d549c4f | 2123 | struct net *net = sock_net(skb->sk); |
5c79de6e | 2124 | |
35a7aa08 | 2125 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2126 | return -EINVAL; |
5c79de6e | 2127 | |
13c1d189 AE |
2128 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2129 | ||
5424f32e | 2130 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2131 | if (err) |
2132 | return err; | |
2133 | ||
13c1d189 | 2134 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2135 | if (err) |
2136 | return err; | |
2137 | ||
2138 | if (!n) | |
2139 | return 0; | |
2140 | ||
8d549c4f | 2141 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net); |
5c79de6e SS |
2142 | |
2143 | return 0; | |
2144 | } | |
2145 | #else | |
2146 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2147 | struct nlattr **attrs) |
5c79de6e SS |
2148 | { |
2149 | return -ENOPROTOOPT; | |
2150 | } | |
2151 | #endif | |
2152 | ||
2153 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2154 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2155 | { |
2156 | struct xfrm_user_migrate um; | |
2157 | ||
2158 | memset(&um, 0, sizeof(um)); | |
2159 | um.proto = m->proto; | |
2160 | um.mode = m->mode; | |
2161 | um.reqid = m->reqid; | |
2162 | um.old_family = m->old_family; | |
2163 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2164 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2165 | um.new_family = m->new_family; | |
2166 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2167 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2168 | ||
c0144bea | 2169 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2170 | } |
2171 | ||
183cad12 | 2172 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2173 | { |
2174 | struct xfrm_user_kmaddress uk; | |
2175 | ||
2176 | memset(&uk, 0, sizeof(uk)); | |
2177 | uk.family = k->family; | |
2178 | uk.reserved = k->reserved; | |
2179 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2180 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2181 | |
2182 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2183 | } | |
2184 | ||
2185 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2186 | { |
2187 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2188 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2189 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2190 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2191 | } |
2192 | ||
183cad12 DM |
2193 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2194 | int num_migrate, const struct xfrm_kmaddress *k, | |
2195 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2196 | { |
183cad12 | 2197 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2198 | struct xfrm_userpolicy_id *pol_id; |
2199 | struct nlmsghdr *nlh; | |
1d1e34dd | 2200 | int i, err; |
5c79de6e | 2201 | |
79b8b7f4 TG |
2202 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2203 | if (nlh == NULL) | |
2204 | return -EMSGSIZE; | |
5c79de6e | 2205 | |
7b67c857 | 2206 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2207 | /* copy data from selector, dir, and type to the pol_id */ |
2208 | memset(pol_id, 0, sizeof(*pol_id)); | |
2209 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2210 | pol_id->dir = dir; | |
2211 | ||
1d1e34dd DM |
2212 | if (k != NULL) { |
2213 | err = copy_to_user_kmaddress(k, skb); | |
2214 | if (err) | |
2215 | goto out_cancel; | |
2216 | } | |
2217 | err = copy_to_user_policy_type(type, skb); | |
2218 | if (err) | |
2219 | goto out_cancel; | |
5c79de6e | 2220 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2221 | err = copy_to_user_migrate(mp, skb); |
2222 | if (err) | |
2223 | goto out_cancel; | |
5c79de6e SS |
2224 | } |
2225 | ||
9825069d | 2226 | return nlmsg_end(skb, nlh); |
1d1e34dd DM |
2227 | |
2228 | out_cancel: | |
9825069d | 2229 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2230 | return err; |
5c79de6e SS |
2231 | } |
2232 | ||
183cad12 DM |
2233 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2234 | const struct xfrm_migrate *m, int num_migrate, | |
2235 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2236 | { |
a6483b79 | 2237 | struct net *net = &init_net; |
5c79de6e | 2238 | struct sk_buff *skb; |
5c79de6e | 2239 | |
13c1d189 | 2240 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2241 | if (skb == NULL) |
2242 | return -ENOMEM; | |
2243 | ||
2244 | /* build migrate */ | |
13c1d189 | 2245 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2246 | BUG(); |
2247 | ||
a6483b79 | 2248 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2249 | } |
2250 | #else | |
183cad12 DM |
2251 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2252 | const struct xfrm_migrate *m, int num_migrate, | |
2253 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2254 | { |
2255 | return -ENOPROTOOPT; | |
2256 | } | |
2257 | #endif | |
d51d081d | 2258 | |
a7bd9a45 | 2259 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2260 | |
2261 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2262 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2263 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2264 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2265 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2266 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2267 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2268 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2269 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2270 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2271 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2272 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2273 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2274 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2275 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2276 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2277 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2278 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2279 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2280 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2281 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2282 | }; |
2283 | ||
492b558b TG |
2284 | #undef XMSGSIZE |
2285 | ||
cf5cb79f | 2286 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2287 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2288 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2289 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2290 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2291 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2292 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2293 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2294 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2295 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2296 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2297 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2298 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2299 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2300 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2301 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2302 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2303 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2304 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2305 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2306 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2307 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2308 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2309 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
a947b0a9 | 2310 | [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, |
cf5cb79f TG |
2311 | }; |
2312 | ||
05600a79 | 2313 | static const struct xfrm_link { |
5424f32e | 2314 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2315 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2316 | int (*done)(struct netlink_callback *); |
492b558b TG |
2317 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2318 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2319 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2320 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2321 | .dump = xfrm_dump_sa, |
2322 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2323 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2324 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2325 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2326 | .dump = xfrm_dump_policy, |
2327 | .done = xfrm_dump_policy_done }, | |
492b558b | 2328 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2329 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2330 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2331 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2332 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2333 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2334 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2335 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2336 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2337 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2338 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2339 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2340 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2341 | }; |
2342 | ||
1d00a4eb | 2343 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2344 | { |
a6483b79 | 2345 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2346 | struct nlattr *attrs[XFRMA_MAX+1]; |
05600a79 | 2347 | const struct xfrm_link *link; |
a7bd9a45 | 2348 | int type, err; |
1da177e4 | 2349 | |
1da177e4 | 2350 | type = nlh->nlmsg_type; |
1da177e4 | 2351 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2352 | return -EINVAL; |
1da177e4 LT |
2353 | |
2354 | type -= XFRM_MSG_BASE; | |
2355 | link = &xfrm_dispatch[type]; | |
2356 | ||
2357 | /* All operations require privileges, even GET */ | |
df008c91 | 2358 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1d00a4eb | 2359 | return -EPERM; |
1da177e4 | 2360 | |
492b558b TG |
2361 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2362 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2363 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2364 | if (link->dump == NULL) |
1d00a4eb | 2365 | return -EINVAL; |
88fc2c84 | 2366 | |
80d326fa PNA |
2367 | { |
2368 | struct netlink_dump_control c = { | |
2369 | .dump = link->dump, | |
2370 | .done = link->done, | |
2371 | }; | |
2372 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2373 | } | |
1da177e4 LT |
2374 | } |
2375 | ||
35a7aa08 | 2376 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2377 | xfrma_policy); |
a7bd9a45 TG |
2378 | if (err < 0) |
2379 | return err; | |
1da177e4 LT |
2380 | |
2381 | if (link->doit == NULL) | |
1d00a4eb | 2382 | return -EINVAL; |
1da177e4 | 2383 | |
5424f32e | 2384 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2385 | } |
2386 | ||
cd40b7d3 | 2387 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2388 | { |
283bc9f3 FD |
2389 | struct net *net = sock_net(skb->sk); |
2390 | ||
2391 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); | |
cd40b7d3 | 2392 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); |
283bc9f3 | 2393 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
2394 | } |
2395 | ||
7deb2264 TG |
2396 | static inline size_t xfrm_expire_msgsize(void) |
2397 | { | |
6f26b61e JHS |
2398 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2399 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2400 | } |
2401 | ||
214e005b | 2402 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2403 | { |
2404 | struct xfrm_user_expire *ue; | |
2405 | struct nlmsghdr *nlh; | |
1d1e34dd | 2406 | int err; |
1da177e4 | 2407 | |
15e47304 | 2408 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
79b8b7f4 TG |
2409 | if (nlh == NULL) |
2410 | return -EMSGSIZE; | |
1da177e4 | 2411 | |
7b67c857 | 2412 | ue = nlmsg_data(nlh); |
1da177e4 | 2413 | copy_to_user_state(x, &ue->state); |
d51d081d | 2414 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2415 | |
1d1e34dd DM |
2416 | err = xfrm_mark_put(skb, &x->mark); |
2417 | if (err) | |
2418 | return err; | |
6f26b61e | 2419 | |
9825069d | 2420 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2421 | } |
2422 | ||
214e005b | 2423 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2424 | { |
fc34acd3 | 2425 | struct net *net = xs_net(x); |
1da177e4 LT |
2426 | struct sk_buff *skb; |
2427 | ||
7deb2264 | 2428 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2429 | if (skb == NULL) |
2430 | return -ENOMEM; | |
2431 | ||
6f26b61e JHS |
2432 | if (build_expire(skb, x, c) < 0) { |
2433 | kfree_skb(skb); | |
2434 | return -EMSGSIZE; | |
2435 | } | |
1da177e4 | 2436 | |
a6483b79 | 2437 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2438 | } |
2439 | ||
214e005b | 2440 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2441 | { |
fc34acd3 | 2442 | struct net *net = xs_net(x); |
d51d081d | 2443 | struct sk_buff *skb; |
d51d081d | 2444 | |
d8647b79 | 2445 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2446 | if (skb == NULL) |
2447 | return -ENOMEM; | |
2448 | ||
2449 | if (build_aevent(skb, x, c) < 0) | |
2450 | BUG(); | |
2451 | ||
a6483b79 | 2452 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2453 | } |
2454 | ||
214e005b | 2455 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2456 | { |
7067802e | 2457 | struct net *net = c->net; |
26b15dad JHS |
2458 | struct xfrm_usersa_flush *p; |
2459 | struct nlmsghdr *nlh; | |
2460 | struct sk_buff *skb; | |
7deb2264 | 2461 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2462 | |
7deb2264 | 2463 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2464 | if (skb == NULL) |
2465 | return -ENOMEM; | |
26b15dad | 2466 | |
15e47304 | 2467 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
79b8b7f4 TG |
2468 | if (nlh == NULL) { |
2469 | kfree_skb(skb); | |
2470 | return -EMSGSIZE; | |
2471 | } | |
26b15dad | 2472 | |
7b67c857 | 2473 | p = nlmsg_data(nlh); |
bf08867f | 2474 | p->proto = c->data.proto; |
26b15dad | 2475 | |
9825069d | 2476 | nlmsg_end(skb, nlh); |
26b15dad | 2477 | |
a6483b79 | 2478 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2479 | } |
2480 | ||
7deb2264 | 2481 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2482 | { |
7deb2264 | 2483 | size_t l = 0; |
1a6509d9 HX |
2484 | if (x->aead) |
2485 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2486 | if (x->aalg) { |
2487 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2488 | (x->aalg->alg_key_len + 7) / 8); | |
2489 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2490 | } | |
26b15dad | 2491 | if (x->ealg) |
0f99be0d | 2492 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2493 | if (x->calg) |
7deb2264 | 2494 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2495 | if (x->encap) |
7deb2264 | 2496 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2497 | if (x->tfcpad) |
2498 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2499 | if (x->replay_esn) |
2500 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
68325d3b HX |
2501 | if (x->security) |
2502 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2503 | x->security->ctx_len); | |
2504 | if (x->coaddr) | |
2505 | l += nla_total_size(sizeof(*x->coaddr)); | |
a947b0a9 ND |
2506 | if (x->props.extra_flags) |
2507 | l += nla_total_size(sizeof(x->props.extra_flags)); | |
68325d3b | 2508 | |
d26f3984 HX |
2509 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2510 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2511 | |
2512 | return l; | |
2513 | } | |
2514 | ||
214e005b | 2515 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2516 | { |
fc34acd3 | 2517 | struct net *net = xs_net(x); |
26b15dad | 2518 | struct xfrm_usersa_info *p; |
0603eac0 | 2519 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2520 | struct nlmsghdr *nlh; |
2521 | struct sk_buff *skb; | |
26b15dad | 2522 | int len = xfrm_sa_len(x); |
1d1e34dd | 2523 | int headlen, err; |
0603eac0 HX |
2524 | |
2525 | headlen = sizeof(*p); | |
2526 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2527 | len += nla_total_size(headlen); |
0603eac0 | 2528 | headlen = sizeof(*id); |
6f26b61e | 2529 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2530 | } |
7deb2264 | 2531 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2532 | |
7deb2264 | 2533 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2534 | if (skb == NULL) |
2535 | return -ENOMEM; | |
26b15dad | 2536 | |
15e47304 | 2537 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2538 | err = -EMSGSIZE; |
79b8b7f4 | 2539 | if (nlh == NULL) |
1d1e34dd | 2540 | goto out_free_skb; |
26b15dad | 2541 | |
7b67c857 | 2542 | p = nlmsg_data(nlh); |
0603eac0 | 2543 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2544 | struct nlattr *attr; |
2545 | ||
7b67c857 | 2546 | id = nlmsg_data(nlh); |
0603eac0 HX |
2547 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2548 | id->spi = x->id.spi; | |
2549 | id->family = x->props.family; | |
2550 | id->proto = x->id.proto; | |
2551 | ||
c0144bea | 2552 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2553 | err = -EMSGSIZE; |
c0144bea | 2554 | if (attr == NULL) |
1d1e34dd | 2555 | goto out_free_skb; |
c0144bea TG |
2556 | |
2557 | p = nla_data(attr); | |
0603eac0 | 2558 | } |
1d1e34dd DM |
2559 | err = copy_to_user_state_extra(x, p, skb); |
2560 | if (err) | |
2561 | goto out_free_skb; | |
26b15dad | 2562 | |
9825069d | 2563 | nlmsg_end(skb, nlh); |
26b15dad | 2564 | |
a6483b79 | 2565 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2566 | |
1d1e34dd | 2567 | out_free_skb: |
26b15dad | 2568 | kfree_skb(skb); |
1d1e34dd | 2569 | return err; |
26b15dad JHS |
2570 | } |
2571 | ||
214e005b | 2572 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2573 | { |
2574 | ||
2575 | switch (c->event) { | |
f60f6b8f | 2576 | case XFRM_MSG_EXPIRE: |
26b15dad | 2577 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2578 | case XFRM_MSG_NEWAE: |
2579 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2580 | case XFRM_MSG_DELSA: |
2581 | case XFRM_MSG_UPDSA: | |
2582 | case XFRM_MSG_NEWSA: | |
26b15dad | 2583 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2584 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2585 | return xfrm_notify_sa_flush(c); |
2586 | default: | |
62db5cfd | 2587 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2588 | c->event); | |
2589 | break; | |
26b15dad JHS |
2590 | } |
2591 | ||
2592 | return 0; | |
2593 | ||
2594 | } | |
2595 | ||
7deb2264 TG |
2596 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2597 | struct xfrm_policy *xp) | |
2598 | { | |
2599 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2600 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2601 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2602 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2603 | + userpolicy_type_attrsize(); | |
2604 | } | |
2605 | ||
1da177e4 | 2606 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
65e0736b | 2607 | struct xfrm_tmpl *xt, struct xfrm_policy *xp) |
1da177e4 | 2608 | { |
1d1e34dd | 2609 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2610 | struct xfrm_user_acquire *ua; |
2611 | struct nlmsghdr *nlh; | |
1d1e34dd | 2612 | int err; |
1da177e4 | 2613 | |
79b8b7f4 TG |
2614 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2615 | if (nlh == NULL) | |
2616 | return -EMSGSIZE; | |
1da177e4 | 2617 | |
7b67c857 | 2618 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2619 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2620 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2621 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
65e0736b | 2622 | copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); |
1da177e4 LT |
2623 | ua->aalgos = xt->aalgos; |
2624 | ua->ealgos = xt->ealgos; | |
2625 | ua->calgos = xt->calgos; | |
2626 | ua->seq = x->km.seq = seq; | |
2627 | ||
1d1e34dd DM |
2628 | err = copy_to_user_tmpl(xp, skb); |
2629 | if (!err) | |
2630 | err = copy_to_user_state_sec_ctx(x, skb); | |
2631 | if (!err) | |
2632 | err = copy_to_user_policy_type(xp->type, skb); | |
2633 | if (!err) | |
2634 | err = xfrm_mark_put(skb, &xp->mark); | |
2635 | if (err) { | |
2636 | nlmsg_cancel(skb, nlh); | |
2637 | return err; | |
2638 | } | |
1da177e4 | 2639 | |
9825069d | 2640 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2641 | } |
2642 | ||
2643 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
65e0736b | 2644 | struct xfrm_policy *xp) |
1da177e4 | 2645 | { |
a6483b79 | 2646 | struct net *net = xs_net(x); |
1da177e4 | 2647 | struct sk_buff *skb; |
1da177e4 | 2648 | |
7deb2264 | 2649 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2650 | if (skb == NULL) |
2651 | return -ENOMEM; | |
2652 | ||
65e0736b | 2653 | if (build_acquire(skb, x, xt, xp) < 0) |
1da177e4 LT |
2654 | BUG(); |
2655 | ||
a6483b79 | 2656 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2657 | } |
2658 | ||
2659 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2660 | * or more templates. | |
2661 | */ | |
cb969f07 | 2662 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2663 | u8 *data, int len, int *dir) |
2664 | { | |
fc34acd3 | 2665 | struct net *net = sock_net(sk); |
1da177e4 LT |
2666 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2667 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2668 | struct xfrm_policy *xp; | |
2669 | int nr; | |
2670 | ||
cb969f07 | 2671 | switch (sk->sk_family) { |
1da177e4 LT |
2672 | case AF_INET: |
2673 | if (opt != IP_XFRM_POLICY) { | |
2674 | *dir = -EOPNOTSUPP; | |
2675 | return NULL; | |
2676 | } | |
2677 | break; | |
dfd56b8b | 2678 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2679 | case AF_INET6: |
2680 | if (opt != IPV6_XFRM_POLICY) { | |
2681 | *dir = -EOPNOTSUPP; | |
2682 | return NULL; | |
2683 | } | |
2684 | break; | |
2685 | #endif | |
2686 | default: | |
2687 | *dir = -EINVAL; | |
2688 | return NULL; | |
2689 | } | |
2690 | ||
2691 | *dir = -EINVAL; | |
2692 | ||
2693 | if (len < sizeof(*p) || | |
2694 | verify_newpolicy_info(p)) | |
2695 | return NULL; | |
2696 | ||
2697 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2698 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2699 | return NULL; |
2700 | ||
a4f1bac6 HX |
2701 | if (p->dir > XFRM_POLICY_OUT) |
2702 | return NULL; | |
2703 | ||
2f09a4d5 | 2704 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2705 | if (xp == NULL) { |
2706 | *dir = -ENOBUFS; | |
2707 | return NULL; | |
2708 | } | |
2709 | ||
2710 | copy_from_user_policy(xp, p); | |
f7b6983f | 2711 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2712 | copy_templates(xp, ut, nr); |
2713 | ||
2714 | *dir = p->dir; | |
2715 | ||
2716 | return xp; | |
2717 | } | |
2718 | ||
7deb2264 TG |
2719 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2720 | { | |
2721 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2722 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2723 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2724 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2725 | + userpolicy_type_attrsize(); |
2726 | } | |
2727 | ||
1da177e4 | 2728 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2729 | int dir, const struct km_event *c) |
1da177e4 LT |
2730 | { |
2731 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2732 | int hard = c->data.hard; |
1d1e34dd DM |
2733 | struct nlmsghdr *nlh; |
2734 | int err; | |
1da177e4 | 2735 | |
15e47304 | 2736 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
79b8b7f4 TG |
2737 | if (nlh == NULL) |
2738 | return -EMSGSIZE; | |
1da177e4 | 2739 | |
7b67c857 | 2740 | upe = nlmsg_data(nlh); |
1da177e4 | 2741 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2742 | err = copy_to_user_tmpl(xp, skb); |
2743 | if (!err) | |
2744 | err = copy_to_user_sec_ctx(xp, skb); | |
2745 | if (!err) | |
2746 | err = copy_to_user_policy_type(xp->type, skb); | |
2747 | if (!err) | |
2748 | err = xfrm_mark_put(skb, &xp->mark); | |
2749 | if (err) { | |
2750 | nlmsg_cancel(skb, nlh); | |
2751 | return err; | |
2752 | } | |
1da177e4 LT |
2753 | upe->hard = !!hard; |
2754 | ||
9825069d | 2755 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2756 | } |
2757 | ||
214e005b | 2758 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2759 | { |
fc34acd3 | 2760 | struct net *net = xp_net(xp); |
1da177e4 | 2761 | struct sk_buff *skb; |
1da177e4 | 2762 | |
7deb2264 | 2763 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2764 | if (skb == NULL) |
2765 | return -ENOMEM; | |
2766 | ||
d51d081d | 2767 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2768 | BUG(); |
2769 | ||
a6483b79 | 2770 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2771 | } |
2772 | ||
214e005b | 2773 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2774 | { |
1d1e34dd | 2775 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2776 | struct net *net = xp_net(xp); |
26b15dad | 2777 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2778 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2779 | struct nlmsghdr *nlh; |
2780 | struct sk_buff *skb; | |
1d1e34dd | 2781 | int headlen, err; |
0603eac0 HX |
2782 | |
2783 | headlen = sizeof(*p); | |
2784 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2785 | len += nla_total_size(headlen); |
0603eac0 HX |
2786 | headlen = sizeof(*id); |
2787 | } | |
cfbfd45a | 2788 | len += userpolicy_type_attrsize(); |
295fae56 | 2789 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2790 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2791 | |
7deb2264 | 2792 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2793 | if (skb == NULL) |
2794 | return -ENOMEM; | |
26b15dad | 2795 | |
15e47304 | 2796 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2797 | err = -EMSGSIZE; |
79b8b7f4 | 2798 | if (nlh == NULL) |
1d1e34dd | 2799 | goto out_free_skb; |
26b15dad | 2800 | |
7b67c857 | 2801 | p = nlmsg_data(nlh); |
0603eac0 | 2802 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2803 | struct nlattr *attr; |
2804 | ||
7b67c857 | 2805 | id = nlmsg_data(nlh); |
0603eac0 HX |
2806 | memset(id, 0, sizeof(*id)); |
2807 | id->dir = dir; | |
2808 | if (c->data.byid) | |
2809 | id->index = xp->index; | |
2810 | else | |
2811 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2812 | ||
c0144bea | 2813 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2814 | err = -EMSGSIZE; |
c0144bea | 2815 | if (attr == NULL) |
1d1e34dd | 2816 | goto out_free_skb; |
c0144bea TG |
2817 | |
2818 | p = nla_data(attr); | |
0603eac0 | 2819 | } |
26b15dad | 2820 | |
26b15dad | 2821 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2822 | err = copy_to_user_tmpl(xp, skb); |
2823 | if (!err) | |
2824 | err = copy_to_user_policy_type(xp->type, skb); | |
2825 | if (!err) | |
2826 | err = xfrm_mark_put(skb, &xp->mark); | |
2827 | if (err) | |
2828 | goto out_free_skb; | |
295fae56 | 2829 | |
9825069d | 2830 | nlmsg_end(skb, nlh); |
26b15dad | 2831 | |
a6483b79 | 2832 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2833 | |
1d1e34dd | 2834 | out_free_skb: |
26b15dad | 2835 | kfree_skb(skb); |
1d1e34dd | 2836 | return err; |
26b15dad JHS |
2837 | } |
2838 | ||
214e005b | 2839 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2840 | { |
7067802e | 2841 | struct net *net = c->net; |
26b15dad JHS |
2842 | struct nlmsghdr *nlh; |
2843 | struct sk_buff *skb; | |
1d1e34dd | 2844 | int err; |
26b15dad | 2845 | |
7deb2264 | 2846 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2847 | if (skb == NULL) |
2848 | return -ENOMEM; | |
26b15dad | 2849 | |
15e47304 | 2850 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2851 | err = -EMSGSIZE; |
79b8b7f4 | 2852 | if (nlh == NULL) |
1d1e34dd DM |
2853 | goto out_free_skb; |
2854 | err = copy_to_user_policy_type(c->data.type, skb); | |
2855 | if (err) | |
2856 | goto out_free_skb; | |
26b15dad | 2857 | |
9825069d | 2858 | nlmsg_end(skb, nlh); |
26b15dad | 2859 | |
a6483b79 | 2860 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2861 | |
1d1e34dd | 2862 | out_free_skb: |
26b15dad | 2863 | kfree_skb(skb); |
1d1e34dd | 2864 | return err; |
26b15dad JHS |
2865 | } |
2866 | ||
214e005b | 2867 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2868 | { |
2869 | ||
2870 | switch (c->event) { | |
f60f6b8f HX |
2871 | case XFRM_MSG_NEWPOLICY: |
2872 | case XFRM_MSG_UPDPOLICY: | |
2873 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2874 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2875 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2876 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2877 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2878 | return xfrm_exp_policy_notify(xp, dir, c); |
2879 | default: | |
62db5cfd | 2880 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2881 | c->event); | |
26b15dad JHS |
2882 | } |
2883 | ||
2884 | return 0; | |
2885 | ||
2886 | } | |
2887 | ||
7deb2264 TG |
2888 | static inline size_t xfrm_report_msgsize(void) |
2889 | { | |
2890 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2891 | } | |
2892 | ||
97a64b45 MN |
2893 | static int build_report(struct sk_buff *skb, u8 proto, |
2894 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2895 | { | |
2896 | struct xfrm_user_report *ur; | |
2897 | struct nlmsghdr *nlh; | |
97a64b45 | 2898 | |
79b8b7f4 TG |
2899 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2900 | if (nlh == NULL) | |
2901 | return -EMSGSIZE; | |
97a64b45 | 2902 | |
7b67c857 | 2903 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2904 | ur->proto = proto; |
2905 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2906 | ||
1d1e34dd DM |
2907 | if (addr) { |
2908 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2909 | if (err) { | |
2910 | nlmsg_cancel(skb, nlh); | |
2911 | return err; | |
2912 | } | |
2913 | } | |
9825069d | 2914 | return nlmsg_end(skb, nlh); |
97a64b45 MN |
2915 | } |
2916 | ||
db983c11 AD |
2917 | static int xfrm_send_report(struct net *net, u8 proto, |
2918 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2919 | { |
2920 | struct sk_buff *skb; | |
97a64b45 | 2921 | |
7deb2264 | 2922 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2923 | if (skb == NULL) |
2924 | return -ENOMEM; | |
2925 | ||
2926 | if (build_report(skb, proto, sel, addr) < 0) | |
2927 | BUG(); | |
2928 | ||
a6483b79 | 2929 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2930 | } |
2931 | ||
3a2dfbe8 MW |
2932 | static inline size_t xfrm_mapping_msgsize(void) |
2933 | { | |
2934 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2935 | } | |
2936 | ||
2937 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2938 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2939 | { | |
2940 | struct xfrm_user_mapping *um; | |
2941 | struct nlmsghdr *nlh; | |
2942 | ||
2943 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2944 | if (nlh == NULL) | |
2945 | return -EMSGSIZE; | |
2946 | ||
2947 | um = nlmsg_data(nlh); | |
2948 | ||
2949 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2950 | um->id.spi = x->id.spi; | |
2951 | um->id.family = x->props.family; | |
2952 | um->id.proto = x->id.proto; | |
2953 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2954 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2955 | um->new_sport = new_sport; | |
2956 | um->old_sport = x->encap->encap_sport; | |
2957 | um->reqid = x->props.reqid; | |
2958 | ||
2959 | return nlmsg_end(skb, nlh); | |
2960 | } | |
2961 | ||
2962 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2963 | __be16 sport) | |
2964 | { | |
a6483b79 | 2965 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2966 | struct sk_buff *skb; |
2967 | ||
2968 | if (x->id.proto != IPPROTO_ESP) | |
2969 | return -EINVAL; | |
2970 | ||
2971 | if (!x->encap) | |
2972 | return -EINVAL; | |
2973 | ||
2974 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2975 | if (skb == NULL) | |
2976 | return -ENOMEM; | |
2977 | ||
2978 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2979 | BUG(); | |
2980 | ||
a6483b79 | 2981 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2982 | } |
2983 | ||
1da177e4 LT |
2984 | static struct xfrm_mgr netlink_mgr = { |
2985 | .id = "netlink", | |
2986 | .notify = xfrm_send_state_notify, | |
2987 | .acquire = xfrm_send_acquire, | |
2988 | .compile_policy = xfrm_compile_policy, | |
2989 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2990 | .report = xfrm_send_report, |
5c79de6e | 2991 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2992 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2993 | }; |
2994 | ||
a6483b79 | 2995 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2996 | { |
be33690d | 2997 | struct sock *nlsk; |
a31f2d17 PNA |
2998 | struct netlink_kernel_cfg cfg = { |
2999 | .groups = XFRMNLGRP_MAX, | |
3000 | .input = xfrm_netlink_rcv, | |
3001 | }; | |
be33690d | 3002 | |
9f00d977 | 3003 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); |
be33690d | 3004 | if (nlsk == NULL) |
1da177e4 | 3005 | return -ENOMEM; |
d79d792e | 3006 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 3007 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
3008 | return 0; |
3009 | } | |
3010 | ||
d79d792e | 3011 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 3012 | { |
d79d792e EB |
3013 | struct net *net; |
3014 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 3015 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
3016 | synchronize_net(); |
3017 | list_for_each_entry(net, net_exit_list, exit_list) | |
3018 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
3019 | } |
3020 | ||
a6483b79 | 3021 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
3022 | .init = xfrm_user_net_init, |
3023 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
3024 | }; |
3025 | ||
3026 | static int __init xfrm_user_init(void) | |
3027 | { | |
3028 | int rv; | |
3029 | ||
3030 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
3031 | ||
3032 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3033 | if (rv < 0) | |
3034 | return rv; | |
3035 | rv = xfrm_register_km(&netlink_mgr); | |
3036 | if (rv < 0) | |
3037 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3038 | return rv; | |
3039 | } | |
3040 | ||
3041 | static void __exit xfrm_user_exit(void) | |
3042 | { | |
3043 | xfrm_unregister_km(&netlink_mgr); | |
3044 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3045 | } | |
3046 | ||
1da177e4 LT |
3047 | module_init(xfrm_user_init); |
3048 | module_exit(xfrm_user_exit); | |
3049 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3050 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3051 |