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 | |
5424f32e | 35 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 36 | { |
5424f32e | 37 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
38 | struct xfrm_algo *algp; |
39 | ||
40 | if (!rt) | |
41 | return 0; | |
42 | ||
5424f32e | 43 | algp = nla_data(rt); |
0f99be0d | 44 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
45 | return -EINVAL; |
46 | ||
1da177e4 LT |
47 | switch (type) { |
48 | case XFRMA_ALG_AUTH: | |
1da177e4 | 49 | case XFRMA_ALG_CRYPT: |
1da177e4 | 50 | case XFRMA_ALG_COMP: |
1da177e4 LT |
51 | break; |
52 | ||
53 | default: | |
54 | return -EINVAL; | |
3ff50b79 | 55 | } |
1da177e4 LT |
56 | |
57 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
58 | return 0; | |
59 | } | |
60 | ||
4447bb33 MW |
61 | static int verify_auth_trunc(struct nlattr **attrs) |
62 | { | |
63 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; | |
64 | struct xfrm_algo_auth *algp; | |
65 | ||
66 | if (!rt) | |
67 | return 0; | |
68 | ||
69 | algp = nla_data(rt); | |
70 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) | |
71 | return -EINVAL; | |
72 | ||
73 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
74 | return 0; | |
75 | } | |
76 | ||
1a6509d9 HX |
77 | static int verify_aead(struct nlattr **attrs) |
78 | { | |
79 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
80 | struct xfrm_algo_aead *algp; | |
81 | ||
82 | if (!rt) | |
83 | return 0; | |
84 | ||
85 | algp = nla_data(rt); | |
86 | if (nla_len(rt) < aead_len(algp)) | |
87 | return -EINVAL; | |
88 | ||
89 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
90 | return 0; | |
91 | } | |
92 | ||
5424f32e | 93 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
94 | xfrm_address_t **addrp) |
95 | { | |
5424f32e | 96 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 97 | |
cf5cb79f | 98 | if (rt && addrp) |
5424f32e | 99 | *addrp = nla_data(rt); |
eb2971b6 | 100 | } |
df71837d | 101 | |
5424f32e | 102 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 103 | { |
5424f32e | 104 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 105 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
106 | |
107 | if (!rt) | |
108 | return 0; | |
109 | ||
5424f32e | 110 | uctx = nla_data(rt); |
cf5cb79f | 111 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
112 | return -EINVAL; |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
d8647b79 SK |
117 | static inline int verify_replay(struct xfrm_usersa_info *p, |
118 | struct nlattr **attrs) | |
119 | { | |
120 | struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; | |
ecd79187 | 121 | struct xfrm_replay_state_esn *rs; |
d8647b79 | 122 | |
ecd79187 MK |
123 | if (p->flags & XFRM_STATE_ESN) { |
124 | if (!rt) | |
125 | return -EINVAL; | |
126 | ||
127 | rs = nla_data(rt); | |
128 | ||
129 | if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) | |
130 | return -EINVAL; | |
131 | ||
132 | if (nla_len(rt) < xfrm_replay_state_esn_len(rs) && | |
133 | nla_len(rt) != sizeof(*rs)) | |
134 | return -EINVAL; | |
135 | } | |
7833aa05 | 136 | |
d8647b79 SK |
137 | if (!rt) |
138 | return 0; | |
139 | ||
01714109 FD |
140 | /* As only ESP and AH support ESN feature. */ |
141 | if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) | |
02aadf72 SK |
142 | return -EINVAL; |
143 | ||
d8647b79 SK |
144 | if (p->replay_window != 0) |
145 | return -EINVAL; | |
146 | ||
147 | return 0; | |
148 | } | |
df71837d | 149 | |
1da177e4 | 150 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 151 | struct nlattr **attrs) |
1da177e4 LT |
152 | { |
153 | int err; | |
154 | ||
155 | err = -EINVAL; | |
156 | switch (p->family) { | |
157 | case AF_INET: | |
158 | break; | |
159 | ||
160 | case AF_INET6: | |
dfd56b8b | 161 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
162 | break; |
163 | #else | |
164 | err = -EAFNOSUPPORT; | |
165 | goto out; | |
166 | #endif | |
167 | ||
168 | default: | |
169 | goto out; | |
3ff50b79 | 170 | } |
1da177e4 LT |
171 | |
172 | err = -EINVAL; | |
173 | switch (p->id.proto) { | |
174 | case IPPROTO_AH: | |
4447bb33 MW |
175 | if ((!attrs[XFRMA_ALG_AUTH] && |
176 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 177 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 178 | attrs[XFRMA_ALG_CRYPT] || |
35d2856b | 179 | attrs[XFRMA_ALG_COMP] || |
a0e5ef53 | 180 | attrs[XFRMA_TFCPAD]) |
1da177e4 LT |
181 | goto out; |
182 | break; | |
183 | ||
184 | case IPPROTO_ESP: | |
1a6509d9 HX |
185 | if (attrs[XFRMA_ALG_COMP]) |
186 | goto out; | |
187 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 188 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
189 | !attrs[XFRMA_ALG_CRYPT] && |
190 | !attrs[XFRMA_ALG_AEAD]) | |
191 | goto out; | |
192 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 193 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
194 | attrs[XFRMA_ALG_CRYPT]) && |
195 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 | 196 | goto out; |
35d2856b MW |
197 | if (attrs[XFRMA_TFCPAD] && |
198 | p->mode != XFRM_MODE_TUNNEL) | |
199 | goto out; | |
1da177e4 LT |
200 | break; |
201 | ||
202 | case IPPROTO_COMP: | |
35a7aa08 | 203 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 204 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 205 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 206 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35d2856b | 207 | attrs[XFRMA_ALG_CRYPT] || |
a0e5ef53 TB |
208 | attrs[XFRMA_TFCPAD] || |
209 | (ntohl(p->id.spi) >= 0x10000)) | |
1da177e4 LT |
210 | goto out; |
211 | break; | |
212 | ||
dfd56b8b | 213 | #if IS_ENABLED(CONFIG_IPV6) |
e23c7194 MN |
214 | case IPPROTO_DSTOPTS: |
215 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
216 | if (attrs[XFRMA_ALG_COMP] || |
217 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 218 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 219 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
220 | attrs[XFRMA_ALG_CRYPT] || |
221 | attrs[XFRMA_ENCAP] || | |
222 | attrs[XFRMA_SEC_CTX] || | |
35d2856b | 223 | attrs[XFRMA_TFCPAD] || |
35a7aa08 | 224 | !attrs[XFRMA_COADDR]) |
e23c7194 MN |
225 | goto out; |
226 | break; | |
227 | #endif | |
228 | ||
1da177e4 LT |
229 | default: |
230 | goto out; | |
3ff50b79 | 231 | } |
1da177e4 | 232 | |
1a6509d9 HX |
233 | if ((err = verify_aead(attrs))) |
234 | goto out; | |
4447bb33 MW |
235 | if ((err = verify_auth_trunc(attrs))) |
236 | goto out; | |
35a7aa08 | 237 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 238 | goto out; |
35a7aa08 | 239 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 240 | goto out; |
35a7aa08 | 241 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 242 | goto out; |
35a7aa08 | 243 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 244 | goto out; |
d8647b79 SK |
245 | if ((err = verify_replay(p, attrs))) |
246 | goto out; | |
1da177e4 LT |
247 | |
248 | err = -EINVAL; | |
249 | switch (p->mode) { | |
7e49e6de MN |
250 | case XFRM_MODE_TRANSPORT: |
251 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 252 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 253 | case XFRM_MODE_BEET: |
1da177e4 LT |
254 | break; |
255 | ||
256 | default: | |
257 | goto out; | |
3ff50b79 | 258 | } |
1da177e4 LT |
259 | |
260 | err = 0; | |
261 | ||
262 | out: | |
263 | return err; | |
264 | } | |
265 | ||
266 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
6f2f19ed | 267 | struct xfrm_algo_desc *(*get_byname)(const char *, int), |
5424f32e | 268 | struct nlattr *rta) |
1da177e4 | 269 | { |
1da177e4 LT |
270 | struct xfrm_algo *p, *ualg; |
271 | struct xfrm_algo_desc *algo; | |
272 | ||
273 | if (!rta) | |
274 | return 0; | |
275 | ||
5424f32e | 276 | ualg = nla_data(rta); |
1da177e4 LT |
277 | |
278 | algo = get_byname(ualg->alg_name, 1); | |
279 | if (!algo) | |
280 | return -ENOSYS; | |
281 | *props = algo->desc.sadb_alg_id; | |
282 | ||
0f99be0d | 283 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
284 | if (!p) |
285 | return -ENOMEM; | |
286 | ||
04ff1260 | 287 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
288 | *algpp = p; |
289 | return 0; | |
290 | } | |
291 | ||
4447bb33 MW |
292 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
293 | struct nlattr *rta) | |
294 | { | |
295 | struct xfrm_algo *ualg; | |
296 | struct xfrm_algo_auth *p; | |
297 | struct xfrm_algo_desc *algo; | |
298 | ||
299 | if (!rta) | |
300 | return 0; | |
301 | ||
302 | ualg = nla_data(rta); | |
303 | ||
304 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
305 | if (!algo) | |
306 | return -ENOSYS; | |
307 | *props = algo->desc.sadb_alg_id; | |
308 | ||
309 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
310 | if (!p) | |
311 | return -ENOMEM; | |
312 | ||
313 | strcpy(p->alg_name, algo->name); | |
314 | p->alg_key_len = ualg->alg_key_len; | |
315 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
316 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
317 | ||
318 | *algpp = p; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
323 | struct nlattr *rta) | |
324 | { | |
325 | struct xfrm_algo_auth *p, *ualg; | |
326 | struct xfrm_algo_desc *algo; | |
327 | ||
328 | if (!rta) | |
329 | return 0; | |
330 | ||
331 | ualg = nla_data(rta); | |
332 | ||
333 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
334 | if (!algo) | |
335 | return -ENOSYS; | |
689f1c9d | 336 | if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) |
4447bb33 MW |
337 | return -EINVAL; |
338 | *props = algo->desc.sadb_alg_id; | |
339 | ||
340 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
341 | if (!p) | |
342 | return -ENOMEM; | |
343 | ||
344 | strcpy(p->alg_name, algo->name); | |
345 | if (!p->alg_trunc_len) | |
346 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
347 | ||
348 | *algpp = p; | |
349 | return 0; | |
350 | } | |
351 | ||
1a6509d9 HX |
352 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
353 | struct nlattr *rta) | |
354 | { | |
355 | struct xfrm_algo_aead *p, *ualg; | |
356 | struct xfrm_algo_desc *algo; | |
357 | ||
358 | if (!rta) | |
359 | return 0; | |
360 | ||
361 | ualg = nla_data(rta); | |
362 | ||
363 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
364 | if (!algo) | |
365 | return -ENOSYS; | |
366 | *props = algo->desc.sadb_alg_id; | |
367 | ||
368 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
369 | if (!p) | |
370 | return -ENOMEM; | |
371 | ||
372 | strcpy(p->alg_name, algo->name); | |
373 | *algpp = p; | |
374 | return 0; | |
375 | } | |
376 | ||
e2b19125 SK |
377 | static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, |
378 | struct nlattr *rp) | |
379 | { | |
380 | struct xfrm_replay_state_esn *up; | |
ecd79187 | 381 | int ulen; |
e2b19125 SK |
382 | |
383 | if (!replay_esn || !rp) | |
384 | return 0; | |
385 | ||
386 | up = nla_data(rp); | |
ecd79187 | 387 | ulen = xfrm_replay_state_esn_len(up); |
e2b19125 | 388 | |
ecd79187 | 389 | if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen) |
e2b19125 SK |
390 | return -EINVAL; |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
d8647b79 SK |
395 | static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, |
396 | struct xfrm_replay_state_esn **preplay_esn, | |
397 | struct nlattr *rta) | |
398 | { | |
399 | struct xfrm_replay_state_esn *p, *pp, *up; | |
ecd79187 | 400 | int klen, ulen; |
d8647b79 SK |
401 | |
402 | if (!rta) | |
403 | return 0; | |
404 | ||
405 | up = nla_data(rta); | |
ecd79187 MK |
406 | klen = xfrm_replay_state_esn_len(up); |
407 | ulen = nla_len(rta) >= klen ? klen : sizeof(*up); | |
d8647b79 | 408 | |
ecd79187 | 409 | p = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
410 | if (!p) |
411 | return -ENOMEM; | |
412 | ||
ecd79187 | 413 | pp = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
414 | if (!pp) { |
415 | kfree(p); | |
416 | return -ENOMEM; | |
417 | } | |
418 | ||
ecd79187 MK |
419 | memcpy(p, up, ulen); |
420 | memcpy(pp, up, ulen); | |
421 | ||
d8647b79 SK |
422 | *replay_esn = p; |
423 | *preplay_esn = pp; | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
661697f7 | 428 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 429 | { |
df71837d TJ |
430 | int len = 0; |
431 | ||
432 | if (xfrm_ctx) { | |
433 | len += sizeof(struct xfrm_user_sec_ctx); | |
434 | len += xfrm_ctx->ctx_len; | |
435 | } | |
436 | return len; | |
437 | } | |
438 | ||
1da177e4 LT |
439 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
440 | { | |
441 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
442 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
443 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
444 | x->props.mode = p->mode; | |
33fce60d FD |
445 | x->props.replay_window = min_t(unsigned int, p->replay_window, |
446 | sizeof(x->replay.bitmap) * 8); | |
1da177e4 LT |
447 | x->props.reqid = p->reqid; |
448 | x->props.family = p->family; | |
54489c14 | 449 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 450 | x->props.flags = p->flags; |
196b0036 | 451 | |
ccf9b3b8 | 452 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 453 | x->sel.family = p->family; |
1da177e4 LT |
454 | } |
455 | ||
d51d081d JHS |
456 | /* |
457 | * someday when pfkey also has support, we could have the code | |
458 | * somehow made shareable and move it to xfrm_state.c - JHS | |
459 | * | |
460 | */ | |
e3ac104d MK |
461 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, |
462 | int update_esn) | |
d51d081d | 463 | { |
5424f32e | 464 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
e3ac104d | 465 | struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; |
5424f32e TG |
466 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
467 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
468 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 469 | |
d8647b79 SK |
470 | if (re) { |
471 | struct xfrm_replay_state_esn *replay_esn; | |
472 | replay_esn = nla_data(re); | |
473 | memcpy(x->replay_esn, replay_esn, | |
474 | xfrm_replay_state_esn_len(replay_esn)); | |
475 | memcpy(x->preplay_esn, replay_esn, | |
476 | xfrm_replay_state_esn_len(replay_esn)); | |
477 | } | |
478 | ||
d51d081d JHS |
479 | if (rp) { |
480 | struct xfrm_replay_state *replay; | |
5424f32e | 481 | replay = nla_data(rp); |
d51d081d JHS |
482 | memcpy(&x->replay, replay, sizeof(*replay)); |
483 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
484 | } | |
485 | ||
486 | if (lt) { | |
487 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 488 | ltime = nla_data(lt); |
d51d081d JHS |
489 | x->curlft.bytes = ltime->bytes; |
490 | x->curlft.packets = ltime->packets; | |
491 | x->curlft.add_time = ltime->add_time; | |
492 | x->curlft.use_time = ltime->use_time; | |
493 | } | |
494 | ||
cf5cb79f | 495 | if (et) |
5424f32e | 496 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 497 | |
cf5cb79f | 498 | if (rt) |
5424f32e | 499 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
500 | } |
501 | ||
fc34acd3 AD |
502 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
503 | struct xfrm_usersa_info *p, | |
5424f32e | 504 | struct nlattr **attrs, |
1da177e4 LT |
505 | int *errp) |
506 | { | |
fc34acd3 | 507 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
508 | int err = -ENOMEM; |
509 | ||
510 | if (!x) | |
511 | goto error_no_put; | |
512 | ||
513 | copy_from_user_state(x, p); | |
514 | ||
a947b0a9 ND |
515 | if (attrs[XFRMA_SA_EXTRA_FLAGS]) |
516 | x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); | |
517 | ||
1a6509d9 HX |
518 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
519 | attrs[XFRMA_ALG_AEAD]))) | |
520 | goto error; | |
4447bb33 MW |
521 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
522 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 523 | goto error; |
4447bb33 MW |
524 | if (!x->props.aalgo) { |
525 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
526 | attrs[XFRMA_ALG_AUTH]))) | |
527 | goto error; | |
528 | } | |
1da177e4 LT |
529 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
530 | xfrm_ealg_get_byname, | |
35a7aa08 | 531 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
532 | goto error; |
533 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
534 | xfrm_calg_get_byname, | |
35a7aa08 | 535 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 536 | goto error; |
fd21150a TG |
537 | |
538 | if (attrs[XFRMA_ENCAP]) { | |
539 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
540 | sizeof(*x->encap), GFP_KERNEL); | |
541 | if (x->encap == NULL) | |
542 | goto error; | |
543 | } | |
544 | ||
35d2856b MW |
545 | if (attrs[XFRMA_TFCPAD]) |
546 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); | |
547 | ||
fd21150a TG |
548 | if (attrs[XFRMA_COADDR]) { |
549 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
550 | sizeof(*x->coaddr), GFP_KERNEL); | |
551 | if (x->coaddr == NULL) | |
552 | goto error; | |
553 | } | |
554 | ||
6f26b61e JHS |
555 | xfrm_mark_get(attrs, &x->mark); |
556 | ||
a454f0cc | 557 | err = __xfrm_init_state(x, false); |
1da177e4 LT |
558 | if (err) |
559 | goto error; | |
560 | ||
fd21150a TG |
561 | if (attrs[XFRMA_SEC_CTX] && |
562 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
563 | goto error; |
564 | ||
d8647b79 SK |
565 | if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, |
566 | attrs[XFRMA_REPLAY_ESN_VAL]))) | |
567 | goto error; | |
568 | ||
1da177e4 | 569 | x->km.seq = p->seq; |
b27aeadb | 570 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 571 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 572 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d | 573 | |
9fdc4883 SK |
574 | if ((err = xfrm_init_replay(x))) |
575 | goto error; | |
d51d081d | 576 | |
9fdc4883 | 577 | /* override default values from above */ |
e3ac104d | 578 | xfrm_update_ae_params(x, attrs, 0); |
1da177e4 LT |
579 | |
580 | return x; | |
581 | ||
582 | error: | |
583 | x->km.state = XFRM_STATE_DEAD; | |
584 | xfrm_state_put(x); | |
585 | error_no_put: | |
586 | *errp = err; | |
587 | return NULL; | |
588 | } | |
589 | ||
22e70050 | 590 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 591 | struct nlattr **attrs) |
1da177e4 | 592 | { |
fc34acd3 | 593 | struct net *net = sock_net(skb->sk); |
7b67c857 | 594 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
595 | struct xfrm_state *x; |
596 | int err; | |
26b15dad | 597 | struct km_event c; |
1da177e4 | 598 | |
35a7aa08 | 599 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
600 | if (err) |
601 | return err; | |
602 | ||
fc34acd3 | 603 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
604 | if (!x) |
605 | return err; | |
606 | ||
26b15dad | 607 | xfrm_state_hold(x); |
1da177e4 LT |
608 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
609 | err = xfrm_state_add(x); | |
610 | else | |
611 | err = xfrm_state_update(x); | |
612 | ||
2e71029e | 613 | xfrm_audit_state_add(x, err ? 0 : 1, true); |
161a09e7 | 614 | |
1da177e4 LT |
615 | if (err < 0) { |
616 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 617 | __xfrm_state_put(x); |
7d6dfe1f | 618 | goto out; |
1da177e4 LT |
619 | } |
620 | ||
26b15dad | 621 | c.seq = nlh->nlmsg_seq; |
15e47304 | 622 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 623 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
624 | |
625 | km_state_notify(x, &c); | |
7d6dfe1f | 626 | out: |
26b15dad | 627 | xfrm_state_put(x); |
1da177e4 LT |
628 | return err; |
629 | } | |
630 | ||
fc34acd3 AD |
631 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
632 | struct xfrm_usersa_id *p, | |
5424f32e | 633 | struct nlattr **attrs, |
eb2971b6 MN |
634 | int *errp) |
635 | { | |
636 | struct xfrm_state *x = NULL; | |
6f26b61e | 637 | struct xfrm_mark m; |
eb2971b6 | 638 | int err; |
6f26b61e | 639 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
640 | |
641 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
642 | err = -ESRCH; | |
6f26b61e | 643 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
644 | } else { |
645 | xfrm_address_t *saddr = NULL; | |
646 | ||
35a7aa08 | 647 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
648 | if (!saddr) { |
649 | err = -EINVAL; | |
650 | goto out; | |
651 | } | |
652 | ||
9abbffee | 653 | err = -ESRCH; |
6f26b61e JHS |
654 | x = xfrm_state_lookup_byaddr(net, mark, |
655 | &p->daddr, saddr, | |
221df1ed | 656 | p->proto, p->family); |
eb2971b6 MN |
657 | } |
658 | ||
659 | out: | |
660 | if (!x && errp) | |
661 | *errp = err; | |
662 | return x; | |
663 | } | |
664 | ||
22e70050 | 665 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 666 | struct nlattr **attrs) |
1da177e4 | 667 | { |
fc34acd3 | 668 | struct net *net = sock_net(skb->sk); |
1da177e4 | 669 | struct xfrm_state *x; |
eb2971b6 | 670 | int err = -ESRCH; |
26b15dad | 671 | struct km_event c; |
7b67c857 | 672 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 | 673 | |
fc34acd3 | 674 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 675 | if (x == NULL) |
eb2971b6 | 676 | return err; |
1da177e4 | 677 | |
6f68dc37 | 678 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
679 | goto out; |
680 | ||
1da177e4 | 681 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
682 | err = -EPERM; |
683 | goto out; | |
1da177e4 LT |
684 | } |
685 | ||
26b15dad | 686 | err = xfrm_state_delete(x); |
161a09e7 | 687 | |
c8c05a8e CZ |
688 | if (err < 0) |
689 | goto out; | |
26b15dad JHS |
690 | |
691 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 692 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 693 | c.event = nlh->nlmsg_type; |
26b15dad | 694 | km_state_notify(x, &c); |
1da177e4 | 695 | |
c8c05a8e | 696 | out: |
2e71029e | 697 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
c8c05a8e | 698 | xfrm_state_put(x); |
26b15dad | 699 | return err; |
1da177e4 LT |
700 | } |
701 | ||
702 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
703 | { | |
f778a636 | 704 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
705 | memcpy(&p->id, &x->id, sizeof(p->id)); |
706 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
707 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
708 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
709 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 710 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
711 | p->mode = x->props.mode; |
712 | p->replay_window = x->props.replay_window; | |
713 | p->reqid = x->props.reqid; | |
714 | p->family = x->props.family; | |
715 | p->flags = x->props.flags; | |
716 | p->seq = x->km.seq; | |
717 | } | |
718 | ||
719 | struct xfrm_dump_info { | |
720 | struct sk_buff *in_skb; | |
721 | struct sk_buff *out_skb; | |
722 | u32 nlmsg_seq; | |
723 | u16 nlmsg_flags; | |
1da177e4 LT |
724 | }; |
725 | ||
c0144bea TG |
726 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
727 | { | |
c0144bea TG |
728 | struct xfrm_user_sec_ctx *uctx; |
729 | struct nlattr *attr; | |
68325d3b | 730 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
731 | |
732 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
733 | if (attr == NULL) | |
734 | return -EMSGSIZE; | |
735 | ||
736 | uctx = nla_data(attr); | |
737 | uctx->exttype = XFRMA_SEC_CTX; | |
738 | uctx->len = ctx_size; | |
739 | uctx->ctx_doi = s->ctx_doi; | |
740 | uctx->ctx_alg = s->ctx_alg; | |
741 | uctx->ctx_len = s->ctx_len; | |
742 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
4447bb33 MW |
747 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
748 | { | |
749 | struct xfrm_algo *algo; | |
750 | struct nlattr *nla; | |
751 | ||
752 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
753 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
754 | if (!nla) | |
755 | return -EMSGSIZE; | |
756 | ||
757 | algo = nla_data(nla); | |
4c87308b | 758 | strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); |
4447bb33 MW |
759 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
760 | algo->alg_key_len = auth->alg_key_len; | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
68325d3b HX |
765 | /* Don't change this without updating xfrm_sa_len! */ |
766 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
767 | struct xfrm_usersa_info *p, | |
768 | struct sk_buff *skb) | |
1da177e4 | 769 | { |
1d1e34dd | 770 | int ret = 0; |
d0fde795 | 771 | |
1d1e34dd | 772 | copy_to_user_state(x, p); |
68325d3b | 773 | |
a947b0a9 ND |
774 | if (x->props.extra_flags) { |
775 | ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, | |
776 | x->props.extra_flags); | |
777 | if (ret) | |
778 | goto out; | |
779 | } | |
780 | ||
1d1e34dd DM |
781 | if (x->coaddr) { |
782 | ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
783 | if (ret) | |
784 | goto out; | |
785 | } | |
786 | if (x->lastused) { | |
787 | ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused); | |
788 | if (ret) | |
789 | goto out; | |
790 | } | |
791 | if (x->aead) { | |
792 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
793 | if (ret) | |
794 | goto out; | |
795 | } | |
796 | if (x->aalg) { | |
797 | ret = copy_to_user_auth(x->aalg, skb); | |
798 | if (!ret) | |
799 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
800 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
801 | if (ret) | |
802 | goto out; | |
803 | } | |
804 | if (x->ealg) { | |
805 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); | |
806 | if (ret) | |
807 | goto out; | |
808 | } | |
809 | if (x->calg) { | |
810 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
811 | if (ret) | |
812 | goto out; | |
813 | } | |
814 | if (x->encap) { | |
815 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
816 | if (ret) | |
817 | goto out; | |
818 | } | |
819 | if (x->tfcpad) { | |
820 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); | |
821 | if (ret) | |
822 | goto out; | |
823 | } | |
824 | ret = xfrm_mark_put(skb, &x->mark); | |
825 | if (ret) | |
826 | goto out; | |
f293a5e3 | 827 | if (x->replay_esn) |
1d1e34dd DM |
828 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
829 | xfrm_replay_state_esn_len(x->replay_esn), | |
830 | x->replay_esn); | |
f293a5e3 | 831 | else |
832 | ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), | |
833 | &x->replay); | |
834 | if (ret) | |
835 | goto out; | |
1d1e34dd DM |
836 | if (x->security) |
837 | ret = copy_sec_ctx(x->security, skb); | |
838 | out: | |
839 | return ret; | |
68325d3b HX |
840 | } |
841 | ||
842 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
843 | { | |
844 | struct xfrm_dump_info *sp = ptr; | |
845 | struct sk_buff *in_skb = sp->in_skb; | |
846 | struct sk_buff *skb = sp->out_skb; | |
847 | struct xfrm_usersa_info *p; | |
848 | struct nlmsghdr *nlh; | |
849 | int err; | |
850 | ||
15e47304 | 851 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
68325d3b HX |
852 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
853 | if (nlh == NULL) | |
854 | return -EMSGSIZE; | |
855 | ||
856 | p = nlmsg_data(nlh); | |
857 | ||
858 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
859 | if (err) { |
860 | nlmsg_cancel(skb, nlh); | |
861 | return err; | |
862 | } | |
9825069d | 863 | nlmsg_end(skb, nlh); |
1da177e4 | 864 | return 0; |
1da177e4 LT |
865 | } |
866 | ||
4c563f76 TT |
867 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
868 | { | |
869 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
283bc9f3 FD |
870 | struct sock *sk = cb->skb->sk; |
871 | struct net *net = sock_net(sk); | |
872 | ||
873 | xfrm_state_walk_done(walk, net); | |
4c563f76 TT |
874 | return 0; |
875 | } | |
876 | ||
d3623099 | 877 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
1da177e4 LT |
878 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
879 | { | |
fc34acd3 | 880 | struct net *net = sock_net(skb->sk); |
4c563f76 | 881 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
882 | struct xfrm_dump_info info; |
883 | ||
4c563f76 TT |
884 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
885 | sizeof(cb->args) - sizeof(cb->args[0])); | |
886 | ||
1da177e4 LT |
887 | info.in_skb = cb->skb; |
888 | info.out_skb = skb; | |
889 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
890 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
891 | |
892 | if (!cb->args[0]) { | |
d3623099 | 893 | struct nlattr *attrs[XFRMA_MAX+1]; |
870a2df4 | 894 | struct xfrm_address_filter *filter = NULL; |
d3623099 ND |
895 | u8 proto = 0; |
896 | int err; | |
897 | ||
4c563f76 | 898 | cb->args[0] = 1; |
d3623099 ND |
899 | |
900 | err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, | |
901 | xfrma_policy); | |
902 | if (err < 0) | |
903 | return err; | |
904 | ||
870a2df4 | 905 | if (attrs[XFRMA_ADDRESS_FILTER]) { |
d3623099 ND |
906 | filter = kmalloc(sizeof(*filter), GFP_KERNEL); |
907 | if (filter == NULL) | |
908 | return -ENOMEM; | |
909 | ||
870a2df4 | 910 | memcpy(filter, nla_data(attrs[XFRMA_ADDRESS_FILTER]), |
d3623099 ND |
911 | sizeof(*filter)); |
912 | } | |
913 | ||
914 | if (attrs[XFRMA_PROTO]) | |
915 | proto = nla_get_u8(attrs[XFRMA_PROTO]); | |
916 | ||
917 | xfrm_state_walk_init(walk, proto, filter); | |
4c563f76 TT |
918 | } |
919 | ||
fc34acd3 | 920 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
921 | |
922 | return skb->len; | |
923 | } | |
924 | ||
925 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
926 | struct xfrm_state *x, u32 seq) | |
927 | { | |
928 | struct xfrm_dump_info info; | |
929 | struct sk_buff *skb; | |
864745d2 | 930 | int err; |
1da177e4 | 931 | |
7deb2264 | 932 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
933 | if (!skb) |
934 | return ERR_PTR(-ENOMEM); | |
935 | ||
1da177e4 LT |
936 | info.in_skb = in_skb; |
937 | info.out_skb = skb; | |
938 | info.nlmsg_seq = seq; | |
939 | info.nlmsg_flags = 0; | |
1da177e4 | 940 | |
864745d2 MK |
941 | err = dump_one_state(x, 0, &info); |
942 | if (err) { | |
1da177e4 | 943 | kfree_skb(skb); |
864745d2 | 944 | return ERR_PTR(err); |
1da177e4 LT |
945 | } |
946 | ||
947 | return skb; | |
948 | } | |
949 | ||
21ee543e MK |
950 | /* A wrapper for nlmsg_multicast() checking that nlsk is still available. |
951 | * Must be called with RCU read lock. | |
952 | */ | |
953 | static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, | |
954 | u32 pid, unsigned int group) | |
955 | { | |
956 | struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); | |
957 | ||
958 | if (nlsk) | |
959 | return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); | |
960 | else | |
961 | return -1; | |
962 | } | |
963 | ||
7deb2264 TG |
964 | static inline size_t xfrm_spdinfo_msgsize(void) |
965 | { | |
966 | return NLMSG_ALIGN(4) | |
967 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
880a6fab CG |
968 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)) |
969 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)) | |
970 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)); | |
7deb2264 TG |
971 | } |
972 | ||
e071041b | 973 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 974 | u32 portid, u32 seq, u32 flags) |
ecfd6b18 | 975 | { |
5a6d3416 JHS |
976 | struct xfrmk_spdinfo si; |
977 | struct xfrmu_spdinfo spc; | |
978 | struct xfrmu_spdhinfo sph; | |
880a6fab | 979 | struct xfrmu_spdhthresh spt4, spt6; |
ecfd6b18 | 980 | struct nlmsghdr *nlh; |
1d1e34dd | 981 | int err; |
ecfd6b18 | 982 | u32 *f; |
880a6fab | 983 | unsigned lseq; |
ecfd6b18 | 984 | |
15e47304 | 985 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
25985edc | 986 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
987 | return -EMSGSIZE; |
988 | ||
989 | f = nlmsg_data(nlh); | |
990 | *f = flags; | |
e071041b | 991 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
992 | spc.incnt = si.incnt; |
993 | spc.outcnt = si.outcnt; | |
994 | spc.fwdcnt = si.fwdcnt; | |
995 | spc.inscnt = si.inscnt; | |
996 | spc.outscnt = si.outscnt; | |
997 | spc.fwdscnt = si.fwdscnt; | |
998 | sph.spdhcnt = si.spdhcnt; | |
999 | sph.spdhmcnt = si.spdhmcnt; | |
1000 | ||
880a6fab CG |
1001 | do { |
1002 | lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); | |
1003 | ||
1004 | spt4.lbits = net->xfrm.policy_hthresh.lbits4; | |
1005 | spt4.rbits = net->xfrm.policy_hthresh.rbits4; | |
1006 | spt6.lbits = net->xfrm.policy_hthresh.lbits6; | |
1007 | spt6.rbits = net->xfrm.policy_hthresh.rbits6; | |
1008 | } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); | |
1009 | ||
1d1e34dd DM |
1010 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
1011 | if (!err) | |
1012 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
880a6fab CG |
1013 | if (!err) |
1014 | err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); | |
1015 | if (!err) | |
1016 | err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); | |
1d1e34dd DM |
1017 | if (err) { |
1018 | nlmsg_cancel(skb, nlh); | |
1019 | return err; | |
1020 | } | |
ecfd6b18 JHS |
1021 | |
1022 | return nlmsg_end(skb, nlh); | |
ecfd6b18 JHS |
1023 | } |
1024 | ||
880a6fab CG |
1025 | static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
1026 | struct nlattr **attrs) | |
1027 | { | |
1028 | struct net *net = sock_net(skb->sk); | |
1029 | struct xfrmu_spdhthresh *thresh4 = NULL; | |
1030 | struct xfrmu_spdhthresh *thresh6 = NULL; | |
1031 | ||
1032 | /* selector prefixlen thresholds to hash policies */ | |
1033 | if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { | |
1034 | struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; | |
1035 | ||
1036 | if (nla_len(rta) < sizeof(*thresh4)) | |
1037 | return -EINVAL; | |
1038 | thresh4 = nla_data(rta); | |
1039 | if (thresh4->lbits > 32 || thresh4->rbits > 32) | |
1040 | return -EINVAL; | |
1041 | } | |
1042 | if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { | |
1043 | struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; | |
1044 | ||
1045 | if (nla_len(rta) < sizeof(*thresh6)) | |
1046 | return -EINVAL; | |
1047 | thresh6 = nla_data(rta); | |
1048 | if (thresh6->lbits > 128 || thresh6->rbits > 128) | |
1049 | return -EINVAL; | |
1050 | } | |
1051 | ||
1052 | if (thresh4 || thresh6) { | |
1053 | write_seqlock(&net->xfrm.policy_hthresh.lock); | |
1054 | if (thresh4) { | |
1055 | net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; | |
1056 | net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; | |
1057 | } | |
1058 | if (thresh6) { | |
1059 | net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; | |
1060 | net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; | |
1061 | } | |
1062 | write_sequnlock(&net->xfrm.policy_hthresh.lock); | |
1063 | ||
1064 | xfrm_policy_hash_rebuild(net); | |
1065 | } | |
1066 | ||
1067 | return 0; | |
1068 | } | |
1069 | ||
ecfd6b18 | 1070 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1071 | struct nlattr **attrs) |
ecfd6b18 | 1072 | { |
a6483b79 | 1073 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 1074 | struct sk_buff *r_skb; |
7b67c857 | 1075 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1076 | u32 sportid = NETLINK_CB(skb).portid; |
ecfd6b18 | 1077 | u32 seq = nlh->nlmsg_seq; |
ecfd6b18 | 1078 | |
7deb2264 | 1079 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
1080 | if (r_skb == NULL) |
1081 | return -ENOMEM; | |
1082 | ||
15e47304 | 1083 | if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) |
ecfd6b18 JHS |
1084 | BUG(); |
1085 | ||
15e47304 | 1086 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
ecfd6b18 JHS |
1087 | } |
1088 | ||
7deb2264 TG |
1089 | static inline size_t xfrm_sadinfo_msgsize(void) |
1090 | { | |
1091 | return NLMSG_ALIGN(4) | |
1092 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
1093 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
1094 | } | |
1095 | ||
e071041b | 1096 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 1097 | u32 portid, u32 seq, u32 flags) |
28d8909b | 1098 | { |
af11e316 JHS |
1099 | struct xfrmk_sadinfo si; |
1100 | struct xfrmu_sadhinfo sh; | |
28d8909b | 1101 | struct nlmsghdr *nlh; |
1d1e34dd | 1102 | int err; |
28d8909b JHS |
1103 | u32 *f; |
1104 | ||
15e47304 | 1105 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
25985edc | 1106 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
1107 | return -EMSGSIZE; |
1108 | ||
1109 | f = nlmsg_data(nlh); | |
1110 | *f = flags; | |
e071041b | 1111 | xfrm_sad_getinfo(net, &si); |
28d8909b | 1112 | |
af11e316 JHS |
1113 | sh.sadhmcnt = si.sadhmcnt; |
1114 | sh.sadhcnt = si.sadhcnt; | |
1115 | ||
1d1e34dd DM |
1116 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
1117 | if (!err) | |
1118 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
1119 | if (err) { | |
1120 | nlmsg_cancel(skb, nlh); | |
1121 | return err; | |
1122 | } | |
28d8909b JHS |
1123 | |
1124 | return nlmsg_end(skb, nlh); | |
28d8909b JHS |
1125 | } |
1126 | ||
1127 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1128 | struct nlattr **attrs) |
28d8909b | 1129 | { |
a6483b79 | 1130 | struct net *net = sock_net(skb->sk); |
28d8909b | 1131 | struct sk_buff *r_skb; |
7b67c857 | 1132 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1133 | u32 sportid = NETLINK_CB(skb).portid; |
28d8909b | 1134 | u32 seq = nlh->nlmsg_seq; |
28d8909b | 1135 | |
7deb2264 | 1136 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1137 | if (r_skb == NULL) |
1138 | return -ENOMEM; | |
1139 | ||
15e47304 | 1140 | if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) |
28d8909b JHS |
1141 | BUG(); |
1142 | ||
15e47304 | 1143 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
28d8909b JHS |
1144 | } |
1145 | ||
22e70050 | 1146 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1147 | struct nlattr **attrs) |
1da177e4 | 1148 | { |
fc34acd3 | 1149 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1150 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1151 | struct xfrm_state *x; |
1152 | struct sk_buff *resp_skb; | |
eb2971b6 | 1153 | int err = -ESRCH; |
1da177e4 | 1154 | |
fc34acd3 | 1155 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1156 | if (x == NULL) |
1157 | goto out_noput; | |
1158 | ||
1159 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1160 | if (IS_ERR(resp_skb)) { | |
1161 | err = PTR_ERR(resp_skb); | |
1162 | } else { | |
15e47304 | 1163 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1164 | } |
1165 | xfrm_state_put(x); | |
1166 | out_noput: | |
1167 | return err; | |
1168 | } | |
1169 | ||
22e70050 | 1170 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1171 | struct nlattr **attrs) |
1da177e4 | 1172 | { |
fc34acd3 | 1173 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1174 | struct xfrm_state *x; |
1175 | struct xfrm_userspi_info *p; | |
1176 | struct sk_buff *resp_skb; | |
1177 | xfrm_address_t *daddr; | |
1178 | int family; | |
1179 | int err; | |
6f26b61e JHS |
1180 | u32 mark; |
1181 | struct xfrm_mark m; | |
1da177e4 | 1182 | |
7b67c857 | 1183 | p = nlmsg_data(nlh); |
776e9dd9 | 1184 | err = verify_spi_info(p->info.id.proto, p->min, p->max); |
1da177e4 LT |
1185 | if (err) |
1186 | goto out_noput; | |
1187 | ||
1188 | family = p->info.family; | |
1189 | daddr = &p->info.id.daddr; | |
1190 | ||
1191 | x = NULL; | |
6f26b61e JHS |
1192 | |
1193 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1194 | if (p->info.seq) { |
6f26b61e | 1195 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
70e94e66 | 1196 | if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { |
1da177e4 LT |
1197 | xfrm_state_put(x); |
1198 | x = NULL; | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | if (!x) | |
6f26b61e | 1203 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1204 | p->info.id.proto, daddr, |
1205 | &p->info.saddr, 1, | |
1206 | family); | |
1207 | err = -ENOENT; | |
1208 | if (x == NULL) | |
1209 | goto out_noput; | |
1210 | ||
658b219e HX |
1211 | err = xfrm_alloc_spi(x, p->min, p->max); |
1212 | if (err) | |
1213 | goto out; | |
1da177e4 | 1214 | |
658b219e | 1215 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1216 | if (IS_ERR(resp_skb)) { |
1217 | err = PTR_ERR(resp_skb); | |
1218 | goto out; | |
1219 | } | |
1220 | ||
15e47304 | 1221 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1222 | |
1223 | out: | |
1224 | xfrm_state_put(x); | |
1225 | out_noput: | |
1226 | return err; | |
1227 | } | |
1228 | ||
b798a9ed | 1229 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1230 | { |
1231 | switch (dir) { | |
1232 | case XFRM_POLICY_IN: | |
1233 | case XFRM_POLICY_OUT: | |
1234 | case XFRM_POLICY_FWD: | |
1235 | break; | |
1236 | ||
1237 | default: | |
1238 | return -EINVAL; | |
3ff50b79 | 1239 | } |
1da177e4 LT |
1240 | |
1241 | return 0; | |
1242 | } | |
1243 | ||
b798a9ed | 1244 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1245 | { |
1246 | switch (type) { | |
1247 | case XFRM_POLICY_TYPE_MAIN: | |
1248 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1249 | case XFRM_POLICY_TYPE_SUB: | |
1250 | #endif | |
1251 | break; | |
1252 | ||
1253 | default: | |
1254 | return -EINVAL; | |
3ff50b79 | 1255 | } |
f7b6983f MN |
1256 | |
1257 | return 0; | |
1258 | } | |
1259 | ||
1da177e4 LT |
1260 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1261 | { | |
e682adf0 FD |
1262 | int ret; |
1263 | ||
1da177e4 LT |
1264 | switch (p->share) { |
1265 | case XFRM_SHARE_ANY: | |
1266 | case XFRM_SHARE_SESSION: | |
1267 | case XFRM_SHARE_USER: | |
1268 | case XFRM_SHARE_UNIQUE: | |
1269 | break; | |
1270 | ||
1271 | default: | |
1272 | return -EINVAL; | |
3ff50b79 | 1273 | } |
1da177e4 LT |
1274 | |
1275 | switch (p->action) { | |
1276 | case XFRM_POLICY_ALLOW: | |
1277 | case XFRM_POLICY_BLOCK: | |
1278 | break; | |
1279 | ||
1280 | default: | |
1281 | return -EINVAL; | |
3ff50b79 | 1282 | } |
1da177e4 LT |
1283 | |
1284 | switch (p->sel.family) { | |
1285 | case AF_INET: | |
1286 | break; | |
1287 | ||
1288 | case AF_INET6: | |
dfd56b8b | 1289 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1290 | break; |
1291 | #else | |
1292 | return -EAFNOSUPPORT; | |
1293 | #endif | |
1294 | ||
1295 | default: | |
1296 | return -EINVAL; | |
3ff50b79 | 1297 | } |
1da177e4 | 1298 | |
e682adf0 FD |
1299 | ret = verify_policy_dir(p->dir); |
1300 | if (ret) | |
1301 | return ret; | |
1302 | if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir)) | |
1303 | return -EINVAL; | |
1304 | ||
1305 | return 0; | |
1da177e4 LT |
1306 | } |
1307 | ||
5424f32e | 1308 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1309 | { |
5424f32e | 1310 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1311 | struct xfrm_user_sec_ctx *uctx; |
1312 | ||
1313 | if (!rt) | |
1314 | return 0; | |
1315 | ||
5424f32e | 1316 | uctx = nla_data(rt); |
52a4c640 | 1317 | return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); |
df71837d TJ |
1318 | } |
1319 | ||
1da177e4 LT |
1320 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1321 | int nr) | |
1322 | { | |
1323 | int i; | |
1324 | ||
1325 | xp->xfrm_nr = nr; | |
1326 | for (i = 0; i < nr; i++, ut++) { | |
1327 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1328 | ||
1329 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1330 | memcpy(&t->saddr, &ut->saddr, | |
1331 | sizeof(xfrm_address_t)); | |
1332 | t->reqid = ut->reqid; | |
1333 | t->mode = ut->mode; | |
1334 | t->share = ut->share; | |
1335 | t->optional = ut->optional; | |
1336 | t->aalgos = ut->aalgos; | |
1337 | t->ealgos = ut->ealgos; | |
1338 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1339 | /* If all masks are ~0, then we allow all algorithms. */ |
1340 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1341 | t->encap_family = ut->family; |
1da177e4 LT |
1342 | } |
1343 | } | |
1344 | ||
b4ad86bf DM |
1345 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1346 | { | |
1347 | int i; | |
1348 | ||
1349 | if (nr > XFRM_MAX_DEPTH) | |
1350 | return -EINVAL; | |
1351 | ||
1352 | for (i = 0; i < nr; i++) { | |
1353 | /* We never validated the ut->family value, so many | |
1354 | * applications simply leave it at zero. The check was | |
1355 | * never made and ut->family was ignored because all | |
1356 | * templates could be assumed to have the same family as | |
1357 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1358 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1359 | */ | |
1360 | if (!ut[i].family) | |
1361 | ut[i].family = family; | |
1362 | ||
1363 | switch (ut[i].family) { | |
1364 | case AF_INET: | |
1365 | break; | |
dfd56b8b | 1366 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1367 | case AF_INET6: |
1368 | break; | |
1369 | #endif | |
1370 | default: | |
1371 | return -EINVAL; | |
3ff50b79 | 1372 | } |
b4ad86bf DM |
1373 | } |
1374 | ||
1375 | return 0; | |
1376 | } | |
1377 | ||
5424f32e | 1378 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1379 | { |
5424f32e | 1380 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1381 | |
1382 | if (!rt) { | |
1383 | pol->xfrm_nr = 0; | |
1384 | } else { | |
5424f32e TG |
1385 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1386 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1387 | int err; |
1da177e4 | 1388 | |
b4ad86bf DM |
1389 | err = validate_tmpl(nr, utmpl, pol->family); |
1390 | if (err) | |
1391 | return err; | |
1da177e4 | 1392 | |
5424f32e | 1393 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1394 | } |
1395 | return 0; | |
1396 | } | |
1397 | ||
5424f32e | 1398 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1399 | { |
5424f32e | 1400 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1401 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1402 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1403 | int err; |
1404 | ||
1405 | if (rt) { | |
5424f32e | 1406 | upt = nla_data(rt); |
f7b6983f MN |
1407 | type = upt->type; |
1408 | } | |
1409 | ||
1410 | err = verify_policy_type(type); | |
1411 | if (err) | |
1412 | return err; | |
1413 | ||
1414 | *tp = type; | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1da177e4 LT |
1418 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1419 | { | |
1420 | xp->priority = p->priority; | |
1421 | xp->index = p->index; | |
1422 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1423 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1424 | xp->action = p->action; | |
1425 | xp->flags = p->flags; | |
1426 | xp->family = p->sel.family; | |
1427 | /* XXX xp->share = p->share; */ | |
1428 | } | |
1429 | ||
1430 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1431 | { | |
7b789836 | 1432 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
1433 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
1434 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1435 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1436 | p->priority = xp->priority; | |
1437 | p->index = xp->index; | |
1438 | p->sel.family = xp->family; | |
1439 | p->dir = dir; | |
1440 | p->action = xp->action; | |
1441 | p->flags = xp->flags; | |
1442 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1443 | } | |
1444 | ||
fc34acd3 | 1445 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1446 | { |
fc34acd3 | 1447 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1448 | int err; |
1449 | ||
1450 | if (!xp) { | |
1451 | *errp = -ENOMEM; | |
1452 | return NULL; | |
1453 | } | |
1454 | ||
1455 | copy_from_user_policy(xp, p); | |
df71837d | 1456 | |
35a7aa08 | 1457 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1458 | if (err) |
1459 | goto error; | |
1460 | ||
35a7aa08 TG |
1461 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1462 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1463 | if (err) |
1464 | goto error; | |
1da177e4 | 1465 | |
295fae56 JHS |
1466 | xfrm_mark_get(attrs, &xp->mark); |
1467 | ||
1da177e4 | 1468 | return xp; |
f7b6983f MN |
1469 | error: |
1470 | *errp = err; | |
12a169e7 | 1471 | xp->walk.dead = 1; |
64c31b3f | 1472 | xfrm_policy_destroy(xp); |
f7b6983f | 1473 | return NULL; |
1da177e4 LT |
1474 | } |
1475 | ||
22e70050 | 1476 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1477 | struct nlattr **attrs) |
1da177e4 | 1478 | { |
fc34acd3 | 1479 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1480 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1481 | struct xfrm_policy *xp; |
26b15dad | 1482 | struct km_event c; |
1da177e4 LT |
1483 | int err; |
1484 | int excl; | |
1485 | ||
1486 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1487 | if (err) |
1488 | return err; | |
35a7aa08 | 1489 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1490 | if (err) |
1491 | return err; | |
1492 | ||
fc34acd3 | 1493 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1494 | if (!xp) |
1495 | return err; | |
1496 | ||
25985edc | 1497 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1498 | * Aha! this is anti-netlink really i.e more pfkey derived |
1499 | * in netlink excl is a flag and you wouldnt need | |
1500 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1501 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1502 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2e71029e | 1503 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 1504 | |
1da177e4 | 1505 | if (err) { |
03e1ad7b | 1506 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1507 | kfree(xp); |
1508 | return err; | |
1509 | } | |
1510 | ||
f60f6b8f | 1511 | c.event = nlh->nlmsg_type; |
26b15dad | 1512 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1513 | c.portid = nlh->nlmsg_pid; |
26b15dad JHS |
1514 | km_policy_notify(xp, p->dir, &c); |
1515 | ||
1da177e4 LT |
1516 | xfrm_pol_put(xp); |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1522 | { | |
1523 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1524 | int i; | |
1525 | ||
1526 | if (xp->xfrm_nr == 0) | |
1527 | return 0; | |
1528 | ||
1529 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1530 | struct xfrm_user_tmpl *up = &vec[i]; | |
1531 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1532 | ||
1f86840f | 1533 | memset(up, 0, sizeof(*up)); |
1da177e4 | 1534 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
8511d01d | 1535 | up->family = kp->encap_family; |
1da177e4 LT |
1536 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1537 | up->reqid = kp->reqid; | |
1538 | up->mode = kp->mode; | |
1539 | up->share = kp->share; | |
1540 | up->optional = kp->optional; | |
1541 | up->aalgos = kp->aalgos; | |
1542 | up->ealgos = kp->ealgos; | |
1543 | up->calgos = kp->calgos; | |
1544 | } | |
df71837d | 1545 | |
c0144bea TG |
1546 | return nla_put(skb, XFRMA_TMPL, |
1547 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1548 | } |
1549 | ||
1550 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1551 | { | |
1552 | if (x->security) { | |
1553 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1554 | } |
1555 | return 0; | |
0d681623 | 1556 | } |
df71837d | 1557 | |
0d681623 SH |
1558 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1559 | { | |
1d1e34dd | 1560 | if (xp->security) |
0d681623 | 1561 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1562 | return 0; |
df71837d | 1563 | } |
cfbfd45a TG |
1564 | static inline size_t userpolicy_type_attrsize(void) |
1565 | { | |
1566 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1567 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1568 | #else | |
1569 | return 0; | |
1570 | #endif | |
1571 | } | |
df71837d | 1572 | |
f7b6983f | 1573 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1574 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1575 | { |
c0144bea TG |
1576 | struct xfrm_userpolicy_type upt = { |
1577 | .type = type, | |
1578 | }; | |
f7b6983f | 1579 | |
c0144bea | 1580 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1581 | } |
1582 | ||
1583 | #else | |
b798a9ed | 1584 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1585 | { |
1586 | return 0; | |
1587 | } | |
1588 | #endif | |
1589 | ||
1da177e4 LT |
1590 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1591 | { | |
1592 | struct xfrm_dump_info *sp = ptr; | |
1593 | struct xfrm_userpolicy_info *p; | |
1594 | struct sk_buff *in_skb = sp->in_skb; | |
1595 | struct sk_buff *skb = sp->out_skb; | |
1596 | struct nlmsghdr *nlh; | |
1d1e34dd | 1597 | int err; |
1da177e4 | 1598 | |
15e47304 | 1599 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
79b8b7f4 TG |
1600 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
1601 | if (nlh == NULL) | |
1602 | return -EMSGSIZE; | |
1da177e4 | 1603 | |
7b67c857 | 1604 | p = nlmsg_data(nlh); |
1da177e4 | 1605 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1606 | err = copy_to_user_tmpl(xp, skb); |
1607 | if (!err) | |
1608 | err = copy_to_user_sec_ctx(xp, skb); | |
1609 | if (!err) | |
1610 | err = copy_to_user_policy_type(xp->type, skb); | |
1611 | if (!err) | |
1612 | err = xfrm_mark_put(skb, &xp->mark); | |
1613 | if (err) { | |
1614 | nlmsg_cancel(skb, nlh); | |
1615 | return err; | |
1616 | } | |
9825069d | 1617 | nlmsg_end(skb, nlh); |
1da177e4 | 1618 | return 0; |
1da177e4 LT |
1619 | } |
1620 | ||
4c563f76 TT |
1621 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1622 | { | |
1623 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
283bc9f3 | 1624 | struct net *net = sock_net(cb->skb->sk); |
4c563f76 | 1625 | |
283bc9f3 | 1626 | xfrm_policy_walk_done(walk, net); |
4c563f76 TT |
1627 | return 0; |
1628 | } | |
1629 | ||
1da177e4 LT |
1630 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1631 | { | |
fc34acd3 | 1632 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1633 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1634 | struct xfrm_dump_info info; |
1635 | ||
4c563f76 TT |
1636 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1637 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1638 | ||
1da177e4 LT |
1639 | info.in_skb = cb->skb; |
1640 | info.out_skb = skb; | |
1641 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1642 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1643 | |
1644 | if (!cb->args[0]) { | |
1645 | cb->args[0] = 1; | |
1646 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1647 | } | |
1648 | ||
fc34acd3 | 1649 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1650 | |
1651 | return skb->len; | |
1652 | } | |
1653 | ||
1654 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1655 | struct xfrm_policy *xp, | |
1656 | int dir, u32 seq) | |
1657 | { | |
1658 | struct xfrm_dump_info info; | |
1659 | struct sk_buff *skb; | |
c2546372 | 1660 | int err; |
1da177e4 | 1661 | |
7deb2264 | 1662 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1663 | if (!skb) |
1664 | return ERR_PTR(-ENOMEM); | |
1665 | ||
1da177e4 LT |
1666 | info.in_skb = in_skb; |
1667 | info.out_skb = skb; | |
1668 | info.nlmsg_seq = seq; | |
1669 | info.nlmsg_flags = 0; | |
1da177e4 | 1670 | |
c2546372 MK |
1671 | err = dump_one_policy(xp, dir, 0, &info); |
1672 | if (err) { | |
1da177e4 | 1673 | kfree_skb(skb); |
c2546372 | 1674 | return ERR_PTR(err); |
1da177e4 LT |
1675 | } |
1676 | ||
1677 | return skb; | |
1678 | } | |
1679 | ||
22e70050 | 1680 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1681 | struct nlattr **attrs) |
1da177e4 | 1682 | { |
fc34acd3 | 1683 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1684 | struct xfrm_policy *xp; |
1685 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1686 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1687 | int err; |
26b15dad | 1688 | struct km_event c; |
1da177e4 | 1689 | int delete; |
295fae56 JHS |
1690 | struct xfrm_mark m; |
1691 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1692 | |
7b67c857 | 1693 | p = nlmsg_data(nlh); |
1da177e4 LT |
1694 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1695 | ||
35a7aa08 | 1696 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1697 | if (err) |
1698 | return err; | |
1699 | ||
1da177e4 LT |
1700 | err = verify_policy_dir(p->dir); |
1701 | if (err) | |
1702 | return err; | |
1703 | ||
1704 | if (p->index) | |
295fae56 | 1705 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1706 | else { |
5424f32e | 1707 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1708 | struct xfrm_sec_ctx *ctx; |
df71837d | 1709 | |
35a7aa08 | 1710 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1711 | if (err) |
1712 | return err; | |
1713 | ||
2c8dd116 | 1714 | ctx = NULL; |
df71837d | 1715 | if (rt) { |
5424f32e | 1716 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1717 | |
52a4c640 | 1718 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 1719 | if (err) |
df71837d | 1720 | return err; |
2c8dd116 | 1721 | } |
295fae56 | 1722 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1723 | ctx, delete, &err); |
03e1ad7b | 1724 | security_xfrm_policy_free(ctx); |
df71837d | 1725 | } |
1da177e4 LT |
1726 | if (xp == NULL) |
1727 | return -ENOENT; | |
1728 | ||
1729 | if (!delete) { | |
1730 | struct sk_buff *resp_skb; | |
1731 | ||
1732 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1733 | if (IS_ERR(resp_skb)) { | |
1734 | err = PTR_ERR(resp_skb); | |
1735 | } else { | |
a6483b79 | 1736 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
15e47304 | 1737 | NETLINK_CB(skb).portid); |
1da177e4 | 1738 | } |
26b15dad | 1739 | } else { |
2e71029e | 1740 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
1741 | |
1742 | if (err != 0) | |
c8c05a8e | 1743 | goto out; |
13fcfbb0 | 1744 | |
e7443892 | 1745 | c.data.byid = p->index; |
f60f6b8f | 1746 | c.event = nlh->nlmsg_type; |
26b15dad | 1747 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1748 | c.portid = nlh->nlmsg_pid; |
26b15dad | 1749 | km_policy_notify(xp, p->dir, &c); |
1da177e4 LT |
1750 | } |
1751 | ||
c8c05a8e | 1752 | out: |
ef41aaa0 | 1753 | xfrm_pol_put(xp); |
e4c17216 PM |
1754 | if (delete && err == 0) |
1755 | xfrm_garbage_collect(net); | |
1da177e4 LT |
1756 | return err; |
1757 | } | |
1758 | ||
22e70050 | 1759 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1760 | struct nlattr **attrs) |
1da177e4 | 1761 | { |
fc34acd3 | 1762 | struct net *net = sock_net(skb->sk); |
26b15dad | 1763 | struct km_event c; |
7b67c857 | 1764 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
4aa2e62c | 1765 | int err; |
1da177e4 | 1766 | |
2e71029e | 1767 | err = xfrm_state_flush(net, p->proto, true); |
9e64cc95 JHS |
1768 | if (err) { |
1769 | if (err == -ESRCH) /* empty table */ | |
1770 | return 0; | |
069c474e | 1771 | return err; |
9e64cc95 | 1772 | } |
bf08867f | 1773 | c.data.proto = p->proto; |
f60f6b8f | 1774 | c.event = nlh->nlmsg_type; |
26b15dad | 1775 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1776 | c.portid = nlh->nlmsg_pid; |
7067802e | 1777 | c.net = net; |
26b15dad JHS |
1778 | km_state_notify(NULL, &c); |
1779 | ||
1da177e4 LT |
1780 | return 0; |
1781 | } | |
1782 | ||
d8647b79 | 1783 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1784 | { |
d8647b79 SK |
1785 | size_t replay_size = x->replay_esn ? |
1786 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1787 | sizeof(struct xfrm_replay_state); | |
1788 | ||
7deb2264 | 1789 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1790 | + nla_total_size(replay_size) |
7deb2264 | 1791 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1792 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1793 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1794 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1795 | } | |
d51d081d | 1796 | |
214e005b | 1797 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1798 | { |
1799 | struct xfrm_aevent_id *id; | |
1800 | struct nlmsghdr *nlh; | |
1d1e34dd | 1801 | int err; |
d51d081d | 1802 | |
15e47304 | 1803 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
79b8b7f4 TG |
1804 | if (nlh == NULL) |
1805 | return -EMSGSIZE; | |
d51d081d | 1806 | |
7b67c857 | 1807 | id = nlmsg_data(nlh); |
9b7a787d | 1808 | memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); |
d51d081d JHS |
1809 | id->sa_id.spi = x->id.spi; |
1810 | id->sa_id.family = x->props.family; | |
1811 | id->sa_id.proto = x->id.proto; | |
9b7a787d | 1812 | memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); |
2b5f6dcc | 1813 | id->reqid = x->props.reqid; |
d51d081d JHS |
1814 | id->flags = c->data.aevent; |
1815 | ||
d0fde795 | 1816 | if (x->replay_esn) { |
1d1e34dd DM |
1817 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1818 | xfrm_replay_state_esn_len(x->replay_esn), | |
1819 | x->replay_esn); | |
d0fde795 | 1820 | } else { |
1d1e34dd DM |
1821 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1822 | &x->replay); | |
d0fde795 | 1823 | } |
1d1e34dd DM |
1824 | if (err) |
1825 | goto out_cancel; | |
1826 | err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
1827 | if (err) | |
1828 | goto out_cancel; | |
d51d081d | 1829 | |
1d1e34dd DM |
1830 | if (id->flags & XFRM_AE_RTHR) { |
1831 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1832 | if (err) | |
1833 | goto out_cancel; | |
1834 | } | |
1835 | if (id->flags & XFRM_AE_ETHR) { | |
1836 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1837 | x->replay_maxage * 10 / HZ); | |
1838 | if (err) | |
1839 | goto out_cancel; | |
1840 | } | |
1841 | err = xfrm_mark_put(skb, &x->mark); | |
1842 | if (err) | |
1843 | goto out_cancel; | |
6f26b61e | 1844 | |
9825069d | 1845 | return nlmsg_end(skb, nlh); |
d51d081d | 1846 | |
1d1e34dd | 1847 | out_cancel: |
9825069d | 1848 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1849 | return err; |
d51d081d JHS |
1850 | } |
1851 | ||
22e70050 | 1852 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1853 | struct nlattr **attrs) |
d51d081d | 1854 | { |
fc34acd3 | 1855 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1856 | struct xfrm_state *x; |
1857 | struct sk_buff *r_skb; | |
1858 | int err; | |
1859 | struct km_event c; | |
6f26b61e JHS |
1860 | u32 mark; |
1861 | struct xfrm_mark m; | |
7b67c857 | 1862 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1863 | struct xfrm_usersa_id *id = &p->sa_id; |
1864 | ||
6f26b61e JHS |
1865 | mark = xfrm_mark_get(attrs, &m); |
1866 | ||
1867 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1868 | if (x == NULL) |
d51d081d | 1869 | return -ESRCH; |
d8647b79 SK |
1870 | |
1871 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1872 | if (r_skb == NULL) { | |
1873 | xfrm_state_put(x); | |
1874 | return -ENOMEM; | |
d51d081d JHS |
1875 | } |
1876 | ||
1877 | /* | |
1878 | * XXX: is this lock really needed - none of the other | |
1879 | * gets lock (the concern is things getting updated | |
1880 | * while we are still reading) - jhs | |
1881 | */ | |
1882 | spin_lock_bh(&x->lock); | |
1883 | c.data.aevent = p->flags; | |
1884 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1885 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1886 | |
1887 | if (build_aevent(r_skb, x, &c) < 0) | |
1888 | BUG(); | |
15e47304 | 1889 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); |
d51d081d JHS |
1890 | spin_unlock_bh(&x->lock); |
1891 | xfrm_state_put(x); | |
1892 | return err; | |
1893 | } | |
1894 | ||
22e70050 | 1895 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1896 | struct nlattr **attrs) |
d51d081d | 1897 | { |
fc34acd3 | 1898 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1899 | struct xfrm_state *x; |
1900 | struct km_event c; | |
02d0892f | 1901 | int err = -EINVAL; |
6f26b61e JHS |
1902 | u32 mark = 0; |
1903 | struct xfrm_mark m; | |
7b67c857 | 1904 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1905 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1906 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1907 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1908 | |
d8647b79 | 1909 | if (!lt && !rp && !re) |
d51d081d JHS |
1910 | return err; |
1911 | ||
1912 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1913 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1914 | return err; | |
1915 | ||
6f26b61e JHS |
1916 | mark = xfrm_mark_get(attrs, &m); |
1917 | ||
1918 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1919 | if (x == NULL) |
1920 | return -ESRCH; | |
1921 | ||
1922 | if (x->km.state != XFRM_STATE_VALID) | |
1923 | goto out; | |
1924 | ||
4479ff76 | 1925 | err = xfrm_replay_verify_len(x->replay_esn, re); |
e2b19125 SK |
1926 | if (err) |
1927 | goto out; | |
1928 | ||
d51d081d | 1929 | spin_lock_bh(&x->lock); |
e3ac104d | 1930 | xfrm_update_ae_params(x, attrs, 1); |
d51d081d | 1931 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1932 | |
1933 | c.event = nlh->nlmsg_type; | |
1934 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1935 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1936 | c.data.aevent = XFRM_AE_CU; |
1937 | km_state_notify(x, &c); | |
1938 | err = 0; | |
1939 | out: | |
1940 | xfrm_state_put(x); | |
1941 | return err; | |
1942 | } | |
1943 | ||
22e70050 | 1944 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1945 | struct nlattr **attrs) |
1da177e4 | 1946 | { |
fc34acd3 | 1947 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1948 | struct km_event c; |
b798a9ed | 1949 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1950 | int err; |
1951 | ||
35a7aa08 | 1952 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1953 | if (err) |
1954 | return err; | |
26b15dad | 1955 | |
2e71029e | 1956 | err = xfrm_policy_flush(net, type, true); |
2f1eb65f JHS |
1957 | if (err) { |
1958 | if (err == -ESRCH) /* empty table */ | |
1959 | return 0; | |
069c474e | 1960 | return err; |
2f1eb65f JHS |
1961 | } |
1962 | ||
f7b6983f | 1963 | c.data.type = type; |
f60f6b8f | 1964 | c.event = nlh->nlmsg_type; |
26b15dad | 1965 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1966 | c.portid = nlh->nlmsg_pid; |
7067802e | 1967 | c.net = net; |
26b15dad | 1968 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1969 | return 0; |
1970 | } | |
1971 | ||
22e70050 | 1972 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1973 | struct nlattr **attrs) |
6c5c8ca7 | 1974 | { |
fc34acd3 | 1975 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1976 | struct xfrm_policy *xp; |
7b67c857 | 1977 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1978 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1979 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1980 | int err = -ENOENT; |
295fae56 JHS |
1981 | struct xfrm_mark m; |
1982 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1983 | |
35a7aa08 | 1984 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1985 | if (err) |
1986 | return err; | |
1987 | ||
c8bf4d04 TT |
1988 | err = verify_policy_dir(p->dir); |
1989 | if (err) | |
1990 | return err; | |
1991 | ||
6c5c8ca7 | 1992 | if (p->index) |
295fae56 | 1993 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1994 | else { |
5424f32e | 1995 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1996 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1997 | |
35a7aa08 | 1998 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1999 | if (err) |
2000 | return err; | |
2001 | ||
2c8dd116 | 2002 | ctx = NULL; |
6c5c8ca7 | 2003 | if (rt) { |
5424f32e | 2004 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 2005 | |
52a4c640 | 2006 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 2007 | if (err) |
6c5c8ca7 | 2008 | return err; |
2c8dd116 | 2009 | } |
295fae56 | 2010 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 2011 | &p->sel, ctx, 0, &err); |
03e1ad7b | 2012 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 2013 | } |
6c5c8ca7 | 2014 | if (xp == NULL) |
ef41aaa0 | 2015 | return -ENOENT; |
03e1ad7b | 2016 | |
ea2dea9d | 2017 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 2018 | goto out; |
6c5c8ca7 | 2019 | |
6c5c8ca7 JHS |
2020 | err = 0; |
2021 | if (up->hard) { | |
2022 | xfrm_policy_delete(xp, p->dir); | |
2e71029e | 2023 | xfrm_audit_policy_delete(xp, 1, true); |
6c5c8ca7 JHS |
2024 | } else { |
2025 | // reset the timers here? | |
62db5cfd | 2026 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 | 2027 | } |
c6bb8136 | 2028 | km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); |
6c5c8ca7 JHS |
2029 | |
2030 | out: | |
2031 | xfrm_pol_put(xp); | |
2032 | return err; | |
2033 | } | |
2034 | ||
22e70050 | 2035 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2036 | struct nlattr **attrs) |
53bc6b4d | 2037 | { |
fc34acd3 | 2038 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
2039 | struct xfrm_state *x; |
2040 | int err; | |
7b67c857 | 2041 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 2042 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 2043 | struct xfrm_mark m; |
928497f0 | 2044 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 2045 | |
6f26b61e | 2046 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 2047 | |
3a765aa5 | 2048 | err = -ENOENT; |
53bc6b4d JHS |
2049 | if (x == NULL) |
2050 | return err; | |
2051 | ||
53bc6b4d | 2052 | spin_lock_bh(&x->lock); |
3a765aa5 | 2053 | err = -EINVAL; |
53bc6b4d JHS |
2054 | if (x->km.state != XFRM_STATE_VALID) |
2055 | goto out; | |
c6bb8136 | 2056 | km_state_expired(x, ue->hard, nlh->nlmsg_pid); |
53bc6b4d | 2057 | |
161a09e7 | 2058 | if (ue->hard) { |
53bc6b4d | 2059 | __xfrm_state_delete(x); |
2e71029e | 2060 | xfrm_audit_state_delete(x, 1, true); |
161a09e7 | 2061 | } |
3a765aa5 | 2062 | err = 0; |
53bc6b4d JHS |
2063 | out: |
2064 | spin_unlock_bh(&x->lock); | |
2065 | xfrm_state_put(x); | |
2066 | return err; | |
2067 | } | |
2068 | ||
22e70050 | 2069 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2070 | struct nlattr **attrs) |
980ebd25 | 2071 | { |
fc34acd3 | 2072 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
2073 | struct xfrm_policy *xp; |
2074 | struct xfrm_user_tmpl *ut; | |
2075 | int i; | |
5424f32e | 2076 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 2077 | struct xfrm_mark mark; |
980ebd25 | 2078 | |
7b67c857 | 2079 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 2080 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
2081 | int err = -ENOMEM; |
2082 | ||
2083 | if (!x) | |
d8eb9307 | 2084 | goto nomem; |
980ebd25 | 2085 | |
6f26b61e JHS |
2086 | xfrm_mark_get(attrs, &mark); |
2087 | ||
980ebd25 | 2088 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2089 | if (err) |
2090 | goto bad_policy; | |
980ebd25 JHS |
2091 | |
2092 | /* build an XP */ | |
fc34acd3 | 2093 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2094 | if (!xp) |
2095 | goto free_state; | |
980ebd25 JHS |
2096 | |
2097 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2098 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2099 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2100 | xp->mark.m = x->mark.m = mark.m; |
2101 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2102 | ut = nla_data(rt); |
980ebd25 JHS |
2103 | /* extract the templates and for each call km_key */ |
2104 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2105 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2106 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2107 | x->props.mode = t->mode; | |
2108 | x->props.reqid = t->reqid; | |
2109 | x->props.family = ut->family; | |
2110 | t->aalgos = ua->aalgos; | |
2111 | t->ealgos = ua->ealgos; | |
2112 | t->calgos = ua->calgos; | |
2113 | err = km_query(x, t, xp); | |
2114 | ||
2115 | } | |
2116 | ||
2117 | kfree(x); | |
2118 | kfree(xp); | |
2119 | ||
2120 | return 0; | |
d8eb9307 IJ |
2121 | |
2122 | bad_policy: | |
62db5cfd | 2123 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2124 | free_state: |
2125 | kfree(x); | |
2126 | nomem: | |
2127 | return err; | |
980ebd25 JHS |
2128 | } |
2129 | ||
5c79de6e | 2130 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2131 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2132 | struct xfrm_kmaddress *k, |
5424f32e | 2133 | struct nlattr **attrs, int *num) |
5c79de6e | 2134 | { |
5424f32e | 2135 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2136 | struct xfrm_user_migrate *um; |
2137 | int i, num_migrate; | |
2138 | ||
13c1d189 AE |
2139 | if (k != NULL) { |
2140 | struct xfrm_user_kmaddress *uk; | |
2141 | ||
2142 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2143 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2144 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2145 | k->family = uk->family; | |
2146 | k->reserved = uk->reserved; | |
2147 | } | |
2148 | ||
5424f32e TG |
2149 | um = nla_data(rt); |
2150 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2151 | |
2152 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2153 | return -EINVAL; | |
2154 | ||
2155 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2156 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2157 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2158 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2159 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2160 | ||
2161 | ma->proto = um->proto; | |
2162 | ma->mode = um->mode; | |
2163 | ma->reqid = um->reqid; | |
2164 | ||
2165 | ma->old_family = um->old_family; | |
2166 | ma->new_family = um->new_family; | |
2167 | } | |
2168 | ||
2169 | *num = i; | |
2170 | return 0; | |
2171 | } | |
2172 | ||
2173 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2174 | struct nlattr **attrs) |
5c79de6e | 2175 | { |
7b67c857 | 2176 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2177 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2178 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2179 | u8 type; |
2180 | int err; | |
2181 | int n = 0; | |
8d549c4f | 2182 | struct net *net = sock_net(skb->sk); |
5c79de6e | 2183 | |
35a7aa08 | 2184 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2185 | return -EINVAL; |
5c79de6e | 2186 | |
13c1d189 AE |
2187 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2188 | ||
5424f32e | 2189 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2190 | if (err) |
2191 | return err; | |
2192 | ||
13c1d189 | 2193 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2194 | if (err) |
2195 | return err; | |
2196 | ||
2197 | if (!n) | |
2198 | return 0; | |
2199 | ||
8d549c4f | 2200 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net); |
5c79de6e SS |
2201 | |
2202 | return 0; | |
2203 | } | |
2204 | #else | |
2205 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2206 | struct nlattr **attrs) |
5c79de6e SS |
2207 | { |
2208 | return -ENOPROTOOPT; | |
2209 | } | |
2210 | #endif | |
2211 | ||
2212 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2213 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2214 | { |
2215 | struct xfrm_user_migrate um; | |
2216 | ||
2217 | memset(&um, 0, sizeof(um)); | |
2218 | um.proto = m->proto; | |
2219 | um.mode = m->mode; | |
2220 | um.reqid = m->reqid; | |
2221 | um.old_family = m->old_family; | |
2222 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2223 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2224 | um.new_family = m->new_family; | |
2225 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2226 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2227 | ||
c0144bea | 2228 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2229 | } |
2230 | ||
183cad12 | 2231 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2232 | { |
2233 | struct xfrm_user_kmaddress uk; | |
2234 | ||
2235 | memset(&uk, 0, sizeof(uk)); | |
2236 | uk.family = k->family; | |
2237 | uk.reserved = k->reserved; | |
2238 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2239 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2240 | |
2241 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2242 | } | |
2243 | ||
2244 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2245 | { |
2246 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2247 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2248 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2249 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2250 | } |
2251 | ||
183cad12 DM |
2252 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2253 | int num_migrate, const struct xfrm_kmaddress *k, | |
2254 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2255 | { |
183cad12 | 2256 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2257 | struct xfrm_userpolicy_id *pol_id; |
2258 | struct nlmsghdr *nlh; | |
1d1e34dd | 2259 | int i, err; |
5c79de6e | 2260 | |
79b8b7f4 TG |
2261 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2262 | if (nlh == NULL) | |
2263 | return -EMSGSIZE; | |
5c79de6e | 2264 | |
7b67c857 | 2265 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2266 | /* copy data from selector, dir, and type to the pol_id */ |
2267 | memset(pol_id, 0, sizeof(*pol_id)); | |
2268 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2269 | pol_id->dir = dir; | |
2270 | ||
1d1e34dd DM |
2271 | if (k != NULL) { |
2272 | err = copy_to_user_kmaddress(k, skb); | |
2273 | if (err) | |
2274 | goto out_cancel; | |
2275 | } | |
2276 | err = copy_to_user_policy_type(type, skb); | |
2277 | if (err) | |
2278 | goto out_cancel; | |
5c79de6e | 2279 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2280 | err = copy_to_user_migrate(mp, skb); |
2281 | if (err) | |
2282 | goto out_cancel; | |
5c79de6e SS |
2283 | } |
2284 | ||
9825069d | 2285 | return nlmsg_end(skb, nlh); |
1d1e34dd DM |
2286 | |
2287 | out_cancel: | |
9825069d | 2288 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2289 | return err; |
5c79de6e SS |
2290 | } |
2291 | ||
183cad12 DM |
2292 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2293 | const struct xfrm_migrate *m, int num_migrate, | |
2294 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2295 | { |
a6483b79 | 2296 | struct net *net = &init_net; |
5c79de6e | 2297 | struct sk_buff *skb; |
5c79de6e | 2298 | |
13c1d189 | 2299 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2300 | if (skb == NULL) |
2301 | return -ENOMEM; | |
2302 | ||
2303 | /* build migrate */ | |
13c1d189 | 2304 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2305 | BUG(); |
2306 | ||
21ee543e | 2307 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); |
5c79de6e SS |
2308 | } |
2309 | #else | |
183cad12 DM |
2310 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2311 | const struct xfrm_migrate *m, int num_migrate, | |
2312 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2313 | { |
2314 | return -ENOPROTOOPT; | |
2315 | } | |
2316 | #endif | |
d51d081d | 2317 | |
a7bd9a45 | 2318 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2319 | |
2320 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2321 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2322 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2323 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2324 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2325 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2326 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2327 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2328 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2329 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2330 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2331 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2332 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2333 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2334 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2335 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2336 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2337 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2338 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 | 2339 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
880a6fab | 2340 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
a7bd9a45 | 2341 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
1da177e4 LT |
2342 | }; |
2343 | ||
492b558b TG |
2344 | #undef XMSGSIZE |
2345 | ||
cf5cb79f | 2346 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2347 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2348 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2349 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2350 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2351 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2352 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2353 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2354 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2355 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2356 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2357 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2358 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2359 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2360 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2361 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2362 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2363 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2364 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2365 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2366 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2367 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2368 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2369 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
a947b0a9 | 2370 | [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, |
d3623099 | 2371 | [XFRMA_PROTO] = { .type = NLA_U8 }, |
870a2df4 | 2372 | [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, |
cf5cb79f TG |
2373 | }; |
2374 | ||
880a6fab CG |
2375 | static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { |
2376 | [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2377 | [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2378 | }; | |
2379 | ||
05600a79 | 2380 | static const struct xfrm_link { |
5424f32e | 2381 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2382 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2383 | int (*done)(struct netlink_callback *); |
880a6fab CG |
2384 | const struct nla_policy *nla_pol; |
2385 | int nla_max; | |
492b558b TG |
2386 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2387 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2388 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2389 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2390 | .dump = xfrm_dump_sa, |
2391 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2392 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2393 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2394 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2395 | .dump = xfrm_dump_policy, |
2396 | .done = xfrm_dump_policy_done }, | |
492b558b | 2397 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2398 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2399 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2400 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2401 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2402 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2403 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2404 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2405 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2406 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2407 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2408 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
880a6fab CG |
2409 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, |
2410 | .nla_pol = xfrma_spd_policy, | |
2411 | .nla_max = XFRMA_SPD_MAX }, | |
ecfd6b18 | 2412 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2413 | }; |
2414 | ||
1d00a4eb | 2415 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2416 | { |
a6483b79 | 2417 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2418 | struct nlattr *attrs[XFRMA_MAX+1]; |
05600a79 | 2419 | const struct xfrm_link *link; |
a7bd9a45 | 2420 | int type, err; |
1da177e4 | 2421 | |
1da177e4 | 2422 | type = nlh->nlmsg_type; |
1da177e4 | 2423 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2424 | return -EINVAL; |
1da177e4 LT |
2425 | |
2426 | type -= XFRM_MSG_BASE; | |
2427 | link = &xfrm_dispatch[type]; | |
2428 | ||
2429 | /* All operations require privileges, even GET */ | |
90f62cf3 | 2430 | if (!netlink_net_capable(skb, CAP_NET_ADMIN)) |
1d00a4eb | 2431 | return -EPERM; |
1da177e4 | 2432 | |
492b558b TG |
2433 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2434 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2435 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2436 | if (link->dump == NULL) |
1d00a4eb | 2437 | return -EINVAL; |
88fc2c84 | 2438 | |
80d326fa PNA |
2439 | { |
2440 | struct netlink_dump_control c = { | |
2441 | .dump = link->dump, | |
2442 | .done = link->done, | |
2443 | }; | |
2444 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2445 | } | |
1da177e4 LT |
2446 | } |
2447 | ||
880a6fab CG |
2448 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, |
2449 | link->nla_max ? : XFRMA_MAX, | |
2450 | link->nla_pol ? : xfrma_policy); | |
a7bd9a45 TG |
2451 | if (err < 0) |
2452 | return err; | |
1da177e4 LT |
2453 | |
2454 | if (link->doit == NULL) | |
1d00a4eb | 2455 | return -EINVAL; |
1da177e4 | 2456 | |
5424f32e | 2457 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2458 | } |
2459 | ||
cd40b7d3 | 2460 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2461 | { |
283bc9f3 FD |
2462 | struct net *net = sock_net(skb->sk); |
2463 | ||
2464 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); | |
cd40b7d3 | 2465 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); |
283bc9f3 | 2466 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
2467 | } |
2468 | ||
7deb2264 TG |
2469 | static inline size_t xfrm_expire_msgsize(void) |
2470 | { | |
6f26b61e JHS |
2471 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2472 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2473 | } |
2474 | ||
214e005b | 2475 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2476 | { |
2477 | struct xfrm_user_expire *ue; | |
2478 | struct nlmsghdr *nlh; | |
1d1e34dd | 2479 | int err; |
1da177e4 | 2480 | |
15e47304 | 2481 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
79b8b7f4 TG |
2482 | if (nlh == NULL) |
2483 | return -EMSGSIZE; | |
1da177e4 | 2484 | |
7b67c857 | 2485 | ue = nlmsg_data(nlh); |
1da177e4 | 2486 | copy_to_user_state(x, &ue->state); |
d51d081d | 2487 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2488 | |
1d1e34dd DM |
2489 | err = xfrm_mark_put(skb, &x->mark); |
2490 | if (err) | |
2491 | return err; | |
6f26b61e | 2492 | |
9825069d | 2493 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2494 | } |
2495 | ||
214e005b | 2496 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2497 | { |
fc34acd3 | 2498 | struct net *net = xs_net(x); |
1da177e4 LT |
2499 | struct sk_buff *skb; |
2500 | ||
7deb2264 | 2501 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2502 | if (skb == NULL) |
2503 | return -ENOMEM; | |
2504 | ||
6f26b61e JHS |
2505 | if (build_expire(skb, x, c) < 0) { |
2506 | kfree_skb(skb); | |
2507 | return -EMSGSIZE; | |
2508 | } | |
1da177e4 | 2509 | |
21ee543e | 2510 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2511 | } |
2512 | ||
214e005b | 2513 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2514 | { |
fc34acd3 | 2515 | struct net *net = xs_net(x); |
d51d081d | 2516 | struct sk_buff *skb; |
d51d081d | 2517 | |
d8647b79 | 2518 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2519 | if (skb == NULL) |
2520 | return -ENOMEM; | |
2521 | ||
2522 | if (build_aevent(skb, x, c) < 0) | |
2523 | BUG(); | |
2524 | ||
21ee543e | 2525 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); |
d51d081d JHS |
2526 | } |
2527 | ||
214e005b | 2528 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2529 | { |
7067802e | 2530 | struct net *net = c->net; |
26b15dad JHS |
2531 | struct xfrm_usersa_flush *p; |
2532 | struct nlmsghdr *nlh; | |
2533 | struct sk_buff *skb; | |
7deb2264 | 2534 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2535 | |
7deb2264 | 2536 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2537 | if (skb == NULL) |
2538 | return -ENOMEM; | |
26b15dad | 2539 | |
15e47304 | 2540 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
79b8b7f4 TG |
2541 | if (nlh == NULL) { |
2542 | kfree_skb(skb); | |
2543 | return -EMSGSIZE; | |
2544 | } | |
26b15dad | 2545 | |
7b67c857 | 2546 | p = nlmsg_data(nlh); |
bf08867f | 2547 | p->proto = c->data.proto; |
26b15dad | 2548 | |
9825069d | 2549 | nlmsg_end(skb, nlh); |
26b15dad | 2550 | |
21ee543e | 2551 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad JHS |
2552 | } |
2553 | ||
7deb2264 | 2554 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2555 | { |
7deb2264 | 2556 | size_t l = 0; |
1a6509d9 HX |
2557 | if (x->aead) |
2558 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2559 | if (x->aalg) { |
2560 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2561 | (x->aalg->alg_key_len + 7) / 8); | |
2562 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2563 | } | |
26b15dad | 2564 | if (x->ealg) |
0f99be0d | 2565 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2566 | if (x->calg) |
7deb2264 | 2567 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2568 | if (x->encap) |
7deb2264 | 2569 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2570 | if (x->tfcpad) |
2571 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2572 | if (x->replay_esn) |
2573 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
f293a5e3 | 2574 | else |
2575 | l += nla_total_size(sizeof(struct xfrm_replay_state)); | |
68325d3b HX |
2576 | if (x->security) |
2577 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2578 | x->security->ctx_len); | |
2579 | if (x->coaddr) | |
2580 | l += nla_total_size(sizeof(*x->coaddr)); | |
a947b0a9 ND |
2581 | if (x->props.extra_flags) |
2582 | l += nla_total_size(sizeof(x->props.extra_flags)); | |
68325d3b | 2583 | |
d26f3984 HX |
2584 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2585 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2586 | |
2587 | return l; | |
2588 | } | |
2589 | ||
214e005b | 2590 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2591 | { |
fc34acd3 | 2592 | struct net *net = xs_net(x); |
26b15dad | 2593 | struct xfrm_usersa_info *p; |
0603eac0 | 2594 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2595 | struct nlmsghdr *nlh; |
2596 | struct sk_buff *skb; | |
26b15dad | 2597 | int len = xfrm_sa_len(x); |
1d1e34dd | 2598 | int headlen, err; |
0603eac0 HX |
2599 | |
2600 | headlen = sizeof(*p); | |
2601 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2602 | len += nla_total_size(headlen); |
0603eac0 | 2603 | headlen = sizeof(*id); |
6f26b61e | 2604 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2605 | } |
7deb2264 | 2606 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2607 | |
7deb2264 | 2608 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2609 | if (skb == NULL) |
2610 | return -ENOMEM; | |
26b15dad | 2611 | |
15e47304 | 2612 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2613 | err = -EMSGSIZE; |
79b8b7f4 | 2614 | if (nlh == NULL) |
1d1e34dd | 2615 | goto out_free_skb; |
26b15dad | 2616 | |
7b67c857 | 2617 | p = nlmsg_data(nlh); |
0603eac0 | 2618 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2619 | struct nlattr *attr; |
2620 | ||
7b67c857 | 2621 | id = nlmsg_data(nlh); |
0603eac0 HX |
2622 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2623 | id->spi = x->id.spi; | |
2624 | id->family = x->props.family; | |
2625 | id->proto = x->id.proto; | |
2626 | ||
c0144bea | 2627 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2628 | err = -EMSGSIZE; |
c0144bea | 2629 | if (attr == NULL) |
1d1e34dd | 2630 | goto out_free_skb; |
c0144bea TG |
2631 | |
2632 | p = nla_data(attr); | |
0603eac0 | 2633 | } |
1d1e34dd DM |
2634 | err = copy_to_user_state_extra(x, p, skb); |
2635 | if (err) | |
2636 | goto out_free_skb; | |
26b15dad | 2637 | |
9825069d | 2638 | nlmsg_end(skb, nlh); |
26b15dad | 2639 | |
21ee543e | 2640 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad | 2641 | |
1d1e34dd | 2642 | out_free_skb: |
26b15dad | 2643 | kfree_skb(skb); |
1d1e34dd | 2644 | return err; |
26b15dad JHS |
2645 | } |
2646 | ||
214e005b | 2647 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2648 | { |
2649 | ||
2650 | switch (c->event) { | |
f60f6b8f | 2651 | case XFRM_MSG_EXPIRE: |
26b15dad | 2652 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2653 | case XFRM_MSG_NEWAE: |
2654 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2655 | case XFRM_MSG_DELSA: |
2656 | case XFRM_MSG_UPDSA: | |
2657 | case XFRM_MSG_NEWSA: | |
26b15dad | 2658 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2659 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2660 | return xfrm_notify_sa_flush(c); |
2661 | default: | |
62db5cfd | 2662 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2663 | c->event); | |
2664 | break; | |
26b15dad JHS |
2665 | } |
2666 | ||
2667 | return 0; | |
2668 | ||
2669 | } | |
2670 | ||
7deb2264 TG |
2671 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2672 | struct xfrm_policy *xp) | |
2673 | { | |
2674 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2675 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2676 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2677 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2678 | + userpolicy_type_attrsize(); | |
2679 | } | |
2680 | ||
1da177e4 | 2681 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
65e0736b | 2682 | struct xfrm_tmpl *xt, struct xfrm_policy *xp) |
1da177e4 | 2683 | { |
1d1e34dd | 2684 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2685 | struct xfrm_user_acquire *ua; |
2686 | struct nlmsghdr *nlh; | |
1d1e34dd | 2687 | int err; |
1da177e4 | 2688 | |
79b8b7f4 TG |
2689 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2690 | if (nlh == NULL) | |
2691 | return -EMSGSIZE; | |
1da177e4 | 2692 | |
7b67c857 | 2693 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2694 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2695 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2696 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
65e0736b | 2697 | copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); |
1da177e4 LT |
2698 | ua->aalgos = xt->aalgos; |
2699 | ua->ealgos = xt->ealgos; | |
2700 | ua->calgos = xt->calgos; | |
2701 | ua->seq = x->km.seq = seq; | |
2702 | ||
1d1e34dd DM |
2703 | err = copy_to_user_tmpl(xp, skb); |
2704 | if (!err) | |
2705 | err = copy_to_user_state_sec_ctx(x, skb); | |
2706 | if (!err) | |
2707 | err = copy_to_user_policy_type(xp->type, skb); | |
2708 | if (!err) | |
2709 | err = xfrm_mark_put(skb, &xp->mark); | |
2710 | if (err) { | |
2711 | nlmsg_cancel(skb, nlh); | |
2712 | return err; | |
2713 | } | |
1da177e4 | 2714 | |
9825069d | 2715 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2716 | } |
2717 | ||
2718 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
65e0736b | 2719 | struct xfrm_policy *xp) |
1da177e4 | 2720 | { |
a6483b79 | 2721 | struct net *net = xs_net(x); |
1da177e4 | 2722 | struct sk_buff *skb; |
1da177e4 | 2723 | |
7deb2264 | 2724 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2725 | if (skb == NULL) |
2726 | return -ENOMEM; | |
2727 | ||
65e0736b | 2728 | if (build_acquire(skb, x, xt, xp) < 0) |
1da177e4 LT |
2729 | BUG(); |
2730 | ||
21ee543e | 2731 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); |
1da177e4 LT |
2732 | } |
2733 | ||
2734 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2735 | * or more templates. | |
2736 | */ | |
cb969f07 | 2737 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2738 | u8 *data, int len, int *dir) |
2739 | { | |
fc34acd3 | 2740 | struct net *net = sock_net(sk); |
1da177e4 LT |
2741 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2742 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2743 | struct xfrm_policy *xp; | |
2744 | int nr; | |
2745 | ||
cb969f07 | 2746 | switch (sk->sk_family) { |
1da177e4 LT |
2747 | case AF_INET: |
2748 | if (opt != IP_XFRM_POLICY) { | |
2749 | *dir = -EOPNOTSUPP; | |
2750 | return NULL; | |
2751 | } | |
2752 | break; | |
dfd56b8b | 2753 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2754 | case AF_INET6: |
2755 | if (opt != IPV6_XFRM_POLICY) { | |
2756 | *dir = -EOPNOTSUPP; | |
2757 | return NULL; | |
2758 | } | |
2759 | break; | |
2760 | #endif | |
2761 | default: | |
2762 | *dir = -EINVAL; | |
2763 | return NULL; | |
2764 | } | |
2765 | ||
2766 | *dir = -EINVAL; | |
2767 | ||
2768 | if (len < sizeof(*p) || | |
2769 | verify_newpolicy_info(p)) | |
2770 | return NULL; | |
2771 | ||
2772 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2773 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2774 | return NULL; |
2775 | ||
a4f1bac6 HX |
2776 | if (p->dir > XFRM_POLICY_OUT) |
2777 | return NULL; | |
2778 | ||
2f09a4d5 | 2779 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2780 | if (xp == NULL) { |
2781 | *dir = -ENOBUFS; | |
2782 | return NULL; | |
2783 | } | |
2784 | ||
2785 | copy_from_user_policy(xp, p); | |
f7b6983f | 2786 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2787 | copy_templates(xp, ut, nr); |
2788 | ||
2789 | *dir = p->dir; | |
2790 | ||
2791 | return xp; | |
2792 | } | |
2793 | ||
7deb2264 TG |
2794 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2795 | { | |
2796 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2797 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2798 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2799 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2800 | + userpolicy_type_attrsize(); |
2801 | } | |
2802 | ||
1da177e4 | 2803 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2804 | int dir, const struct km_event *c) |
1da177e4 LT |
2805 | { |
2806 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2807 | int hard = c->data.hard; |
1d1e34dd DM |
2808 | struct nlmsghdr *nlh; |
2809 | int err; | |
1da177e4 | 2810 | |
15e47304 | 2811 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
79b8b7f4 TG |
2812 | if (nlh == NULL) |
2813 | return -EMSGSIZE; | |
1da177e4 | 2814 | |
7b67c857 | 2815 | upe = nlmsg_data(nlh); |
1da177e4 | 2816 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2817 | err = copy_to_user_tmpl(xp, skb); |
2818 | if (!err) | |
2819 | err = copy_to_user_sec_ctx(xp, skb); | |
2820 | if (!err) | |
2821 | err = copy_to_user_policy_type(xp->type, skb); | |
2822 | if (!err) | |
2823 | err = xfrm_mark_put(skb, &xp->mark); | |
2824 | if (err) { | |
2825 | nlmsg_cancel(skb, nlh); | |
2826 | return err; | |
2827 | } | |
1da177e4 LT |
2828 | upe->hard = !!hard; |
2829 | ||
9825069d | 2830 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2831 | } |
2832 | ||
214e005b | 2833 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2834 | { |
fc34acd3 | 2835 | struct net *net = xp_net(xp); |
1da177e4 | 2836 | struct sk_buff *skb; |
1da177e4 | 2837 | |
7deb2264 | 2838 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2839 | if (skb == NULL) |
2840 | return -ENOMEM; | |
2841 | ||
d51d081d | 2842 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2843 | BUG(); |
2844 | ||
21ee543e | 2845 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2846 | } |
2847 | ||
214e005b | 2848 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2849 | { |
1d1e34dd | 2850 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2851 | struct net *net = xp_net(xp); |
26b15dad | 2852 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2853 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2854 | struct nlmsghdr *nlh; |
2855 | struct sk_buff *skb; | |
1d1e34dd | 2856 | int headlen, err; |
0603eac0 HX |
2857 | |
2858 | headlen = sizeof(*p); | |
2859 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2860 | len += nla_total_size(headlen); |
0603eac0 HX |
2861 | headlen = sizeof(*id); |
2862 | } | |
cfbfd45a | 2863 | len += userpolicy_type_attrsize(); |
295fae56 | 2864 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2865 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2866 | |
7deb2264 | 2867 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2868 | if (skb == NULL) |
2869 | return -ENOMEM; | |
26b15dad | 2870 | |
15e47304 | 2871 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2872 | err = -EMSGSIZE; |
79b8b7f4 | 2873 | if (nlh == NULL) |
1d1e34dd | 2874 | goto out_free_skb; |
26b15dad | 2875 | |
7b67c857 | 2876 | p = nlmsg_data(nlh); |
0603eac0 | 2877 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2878 | struct nlattr *attr; |
2879 | ||
7b67c857 | 2880 | id = nlmsg_data(nlh); |
0603eac0 HX |
2881 | memset(id, 0, sizeof(*id)); |
2882 | id->dir = dir; | |
2883 | if (c->data.byid) | |
2884 | id->index = xp->index; | |
2885 | else | |
2886 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2887 | ||
c0144bea | 2888 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2889 | err = -EMSGSIZE; |
c0144bea | 2890 | if (attr == NULL) |
1d1e34dd | 2891 | goto out_free_skb; |
c0144bea TG |
2892 | |
2893 | p = nla_data(attr); | |
0603eac0 | 2894 | } |
26b15dad | 2895 | |
26b15dad | 2896 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2897 | err = copy_to_user_tmpl(xp, skb); |
2898 | if (!err) | |
2899 | err = copy_to_user_policy_type(xp->type, skb); | |
2900 | if (!err) | |
2901 | err = xfrm_mark_put(skb, &xp->mark); | |
2902 | if (err) | |
2903 | goto out_free_skb; | |
295fae56 | 2904 | |
9825069d | 2905 | nlmsg_end(skb, nlh); |
26b15dad | 2906 | |
21ee543e | 2907 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2908 | |
1d1e34dd | 2909 | out_free_skb: |
26b15dad | 2910 | kfree_skb(skb); |
1d1e34dd | 2911 | return err; |
26b15dad JHS |
2912 | } |
2913 | ||
214e005b | 2914 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2915 | { |
7067802e | 2916 | struct net *net = c->net; |
26b15dad JHS |
2917 | struct nlmsghdr *nlh; |
2918 | struct sk_buff *skb; | |
1d1e34dd | 2919 | int err; |
26b15dad | 2920 | |
7deb2264 | 2921 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2922 | if (skb == NULL) |
2923 | return -ENOMEM; | |
26b15dad | 2924 | |
15e47304 | 2925 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2926 | err = -EMSGSIZE; |
79b8b7f4 | 2927 | if (nlh == NULL) |
1d1e34dd DM |
2928 | goto out_free_skb; |
2929 | err = copy_to_user_policy_type(c->data.type, skb); | |
2930 | if (err) | |
2931 | goto out_free_skb; | |
26b15dad | 2932 | |
9825069d | 2933 | nlmsg_end(skb, nlh); |
26b15dad | 2934 | |
21ee543e | 2935 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2936 | |
1d1e34dd | 2937 | out_free_skb: |
26b15dad | 2938 | kfree_skb(skb); |
1d1e34dd | 2939 | return err; |
26b15dad JHS |
2940 | } |
2941 | ||
214e005b | 2942 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2943 | { |
2944 | ||
2945 | switch (c->event) { | |
f60f6b8f HX |
2946 | case XFRM_MSG_NEWPOLICY: |
2947 | case XFRM_MSG_UPDPOLICY: | |
2948 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2949 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2950 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2951 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2952 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2953 | return xfrm_exp_policy_notify(xp, dir, c); |
2954 | default: | |
62db5cfd | 2955 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2956 | c->event); | |
26b15dad JHS |
2957 | } |
2958 | ||
2959 | return 0; | |
2960 | ||
2961 | } | |
2962 | ||
7deb2264 TG |
2963 | static inline size_t xfrm_report_msgsize(void) |
2964 | { | |
2965 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2966 | } | |
2967 | ||
97a64b45 MN |
2968 | static int build_report(struct sk_buff *skb, u8 proto, |
2969 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2970 | { | |
2971 | struct xfrm_user_report *ur; | |
2972 | struct nlmsghdr *nlh; | |
97a64b45 | 2973 | |
79b8b7f4 TG |
2974 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2975 | if (nlh == NULL) | |
2976 | return -EMSGSIZE; | |
97a64b45 | 2977 | |
7b67c857 | 2978 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2979 | ur->proto = proto; |
2980 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2981 | ||
1d1e34dd DM |
2982 | if (addr) { |
2983 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2984 | if (err) { | |
2985 | nlmsg_cancel(skb, nlh); | |
2986 | return err; | |
2987 | } | |
2988 | } | |
9825069d | 2989 | return nlmsg_end(skb, nlh); |
97a64b45 MN |
2990 | } |
2991 | ||
db983c11 AD |
2992 | static int xfrm_send_report(struct net *net, u8 proto, |
2993 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2994 | { |
2995 | struct sk_buff *skb; | |
97a64b45 | 2996 | |
7deb2264 | 2997 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2998 | if (skb == NULL) |
2999 | return -ENOMEM; | |
3000 | ||
3001 | if (build_report(skb, proto, sel, addr) < 0) | |
3002 | BUG(); | |
3003 | ||
21ee543e | 3004 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); |
97a64b45 MN |
3005 | } |
3006 | ||
3a2dfbe8 MW |
3007 | static inline size_t xfrm_mapping_msgsize(void) |
3008 | { | |
3009 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
3010 | } | |
3011 | ||
3012 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
3013 | xfrm_address_t *new_saddr, __be16 new_sport) | |
3014 | { | |
3015 | struct xfrm_user_mapping *um; | |
3016 | struct nlmsghdr *nlh; | |
3017 | ||
3018 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
3019 | if (nlh == NULL) | |
3020 | return -EMSGSIZE; | |
3021 | ||
3022 | um = nlmsg_data(nlh); | |
3023 | ||
3024 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
3025 | um->id.spi = x->id.spi; | |
3026 | um->id.family = x->props.family; | |
3027 | um->id.proto = x->id.proto; | |
3028 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
3029 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
3030 | um->new_sport = new_sport; | |
3031 | um->old_sport = x->encap->encap_sport; | |
3032 | um->reqid = x->props.reqid; | |
3033 | ||
3034 | return nlmsg_end(skb, nlh); | |
3035 | } | |
3036 | ||
3037 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
3038 | __be16 sport) | |
3039 | { | |
a6483b79 | 3040 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
3041 | struct sk_buff *skb; |
3042 | ||
3043 | if (x->id.proto != IPPROTO_ESP) | |
3044 | return -EINVAL; | |
3045 | ||
3046 | if (!x->encap) | |
3047 | return -EINVAL; | |
3048 | ||
3049 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
3050 | if (skb == NULL) | |
3051 | return -ENOMEM; | |
3052 | ||
3053 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
3054 | BUG(); | |
3055 | ||
21ee543e | 3056 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); |
3a2dfbe8 MW |
3057 | } |
3058 | ||
0f24558e HG |
3059 | static bool xfrm_is_alive(const struct km_event *c) |
3060 | { | |
3061 | return (bool)xfrm_acquire_is_on(c->net); | |
3062 | } | |
3063 | ||
1da177e4 LT |
3064 | static struct xfrm_mgr netlink_mgr = { |
3065 | .id = "netlink", | |
3066 | .notify = xfrm_send_state_notify, | |
3067 | .acquire = xfrm_send_acquire, | |
3068 | .compile_policy = xfrm_compile_policy, | |
3069 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 3070 | .report = xfrm_send_report, |
5c79de6e | 3071 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 3072 | .new_mapping = xfrm_send_mapping, |
0f24558e | 3073 | .is_alive = xfrm_is_alive, |
1da177e4 LT |
3074 | }; |
3075 | ||
a6483b79 | 3076 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 3077 | { |
be33690d | 3078 | struct sock *nlsk; |
a31f2d17 PNA |
3079 | struct netlink_kernel_cfg cfg = { |
3080 | .groups = XFRMNLGRP_MAX, | |
3081 | .input = xfrm_netlink_rcv, | |
3082 | }; | |
be33690d | 3083 | |
9f00d977 | 3084 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); |
be33690d | 3085 | if (nlsk == NULL) |
1da177e4 | 3086 | return -ENOMEM; |
d79d792e | 3087 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 3088 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
3089 | return 0; |
3090 | } | |
3091 | ||
d79d792e | 3092 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 3093 | { |
d79d792e EB |
3094 | struct net *net; |
3095 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 3096 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
3097 | synchronize_net(); |
3098 | list_for_each_entry(net, net_exit_list, exit_list) | |
3099 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
3100 | } |
3101 | ||
a6483b79 | 3102 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
3103 | .init = xfrm_user_net_init, |
3104 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
3105 | }; |
3106 | ||
3107 | static int __init xfrm_user_init(void) | |
3108 | { | |
3109 | int rv; | |
3110 | ||
3111 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
3112 | ||
3113 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3114 | if (rv < 0) | |
3115 | return rv; | |
3116 | rv = xfrm_register_km(&netlink_mgr); | |
3117 | if (rv < 0) | |
3118 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3119 | return rv; | |
3120 | } | |
3121 | ||
3122 | static void __exit xfrm_user_exit(void) | |
3123 | { | |
3124 | xfrm_unregister_km(&netlink_mgr); | |
3125 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3126 | } | |
3127 | ||
1da177e4 LT |
3128 | module_init(xfrm_user_init); |
3129 | module_exit(xfrm_user_exit); | |
3130 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3131 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3132 |