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; | |
827 | if (x->replay_esn) { | |
828 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, | |
829 | xfrm_replay_state_esn_len(x->replay_esn), | |
830 | x->replay_esn); | |
831 | if (ret) | |
832 | goto out; | |
833 | } | |
834 | if (x->security) | |
835 | ret = copy_sec_ctx(x->security, skb); | |
836 | out: | |
837 | return ret; | |
68325d3b HX |
838 | } |
839 | ||
840 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
841 | { | |
842 | struct xfrm_dump_info *sp = ptr; | |
843 | struct sk_buff *in_skb = sp->in_skb; | |
844 | struct sk_buff *skb = sp->out_skb; | |
845 | struct xfrm_usersa_info *p; | |
846 | struct nlmsghdr *nlh; | |
847 | int err; | |
848 | ||
15e47304 | 849 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
68325d3b HX |
850 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
851 | if (nlh == NULL) | |
852 | return -EMSGSIZE; | |
853 | ||
854 | p = nlmsg_data(nlh); | |
855 | ||
856 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
857 | if (err) { |
858 | nlmsg_cancel(skb, nlh); | |
859 | return err; | |
860 | } | |
9825069d | 861 | nlmsg_end(skb, nlh); |
1da177e4 | 862 | return 0; |
1da177e4 LT |
863 | } |
864 | ||
4c563f76 TT |
865 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
866 | { | |
867 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
283bc9f3 FD |
868 | struct sock *sk = cb->skb->sk; |
869 | struct net *net = sock_net(sk); | |
870 | ||
871 | xfrm_state_walk_done(walk, net); | |
4c563f76 TT |
872 | return 0; |
873 | } | |
874 | ||
d3623099 | 875 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
1da177e4 LT |
876 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
877 | { | |
fc34acd3 | 878 | struct net *net = sock_net(skb->sk); |
4c563f76 | 879 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
880 | struct xfrm_dump_info info; |
881 | ||
4c563f76 TT |
882 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
883 | sizeof(cb->args) - sizeof(cb->args[0])); | |
884 | ||
1da177e4 LT |
885 | info.in_skb = cb->skb; |
886 | info.out_skb = skb; | |
887 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
888 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
889 | |
890 | if (!cb->args[0]) { | |
d3623099 | 891 | struct nlattr *attrs[XFRMA_MAX+1]; |
870a2df4 | 892 | struct xfrm_address_filter *filter = NULL; |
d3623099 ND |
893 | u8 proto = 0; |
894 | int err; | |
895 | ||
4c563f76 | 896 | cb->args[0] = 1; |
d3623099 ND |
897 | |
898 | err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, | |
899 | xfrma_policy); | |
900 | if (err < 0) | |
901 | return err; | |
902 | ||
870a2df4 | 903 | if (attrs[XFRMA_ADDRESS_FILTER]) { |
d3623099 ND |
904 | filter = kmalloc(sizeof(*filter), GFP_KERNEL); |
905 | if (filter == NULL) | |
906 | return -ENOMEM; | |
907 | ||
870a2df4 | 908 | memcpy(filter, nla_data(attrs[XFRMA_ADDRESS_FILTER]), |
d3623099 ND |
909 | sizeof(*filter)); |
910 | } | |
911 | ||
912 | if (attrs[XFRMA_PROTO]) | |
913 | proto = nla_get_u8(attrs[XFRMA_PROTO]); | |
914 | ||
915 | xfrm_state_walk_init(walk, proto, filter); | |
4c563f76 TT |
916 | } |
917 | ||
fc34acd3 | 918 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
919 | |
920 | return skb->len; | |
921 | } | |
922 | ||
923 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
924 | struct xfrm_state *x, u32 seq) | |
925 | { | |
926 | struct xfrm_dump_info info; | |
927 | struct sk_buff *skb; | |
864745d2 | 928 | int err; |
1da177e4 | 929 | |
7deb2264 | 930 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
931 | if (!skb) |
932 | return ERR_PTR(-ENOMEM); | |
933 | ||
1da177e4 LT |
934 | info.in_skb = in_skb; |
935 | info.out_skb = skb; | |
936 | info.nlmsg_seq = seq; | |
937 | info.nlmsg_flags = 0; | |
1da177e4 | 938 | |
864745d2 MK |
939 | err = dump_one_state(x, 0, &info); |
940 | if (err) { | |
1da177e4 | 941 | kfree_skb(skb); |
864745d2 | 942 | return ERR_PTR(err); |
1da177e4 LT |
943 | } |
944 | ||
945 | return skb; | |
946 | } | |
947 | ||
21ee543e MK |
948 | /* A wrapper for nlmsg_multicast() checking that nlsk is still available. |
949 | * Must be called with RCU read lock. | |
950 | */ | |
951 | static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, | |
952 | u32 pid, unsigned int group) | |
953 | { | |
954 | struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); | |
955 | ||
956 | if (nlsk) | |
957 | return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); | |
958 | else | |
959 | return -1; | |
960 | } | |
961 | ||
7deb2264 TG |
962 | static inline size_t xfrm_spdinfo_msgsize(void) |
963 | { | |
964 | return NLMSG_ALIGN(4) | |
965 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
880a6fab CG |
966 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)) |
967 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)) | |
968 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)); | |
7deb2264 TG |
969 | } |
970 | ||
e071041b | 971 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 972 | u32 portid, u32 seq, u32 flags) |
ecfd6b18 | 973 | { |
5a6d3416 JHS |
974 | struct xfrmk_spdinfo si; |
975 | struct xfrmu_spdinfo spc; | |
976 | struct xfrmu_spdhinfo sph; | |
880a6fab | 977 | struct xfrmu_spdhthresh spt4, spt6; |
ecfd6b18 | 978 | struct nlmsghdr *nlh; |
1d1e34dd | 979 | int err; |
ecfd6b18 | 980 | u32 *f; |
880a6fab | 981 | unsigned lseq; |
ecfd6b18 | 982 | |
15e47304 | 983 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
25985edc | 984 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
985 | return -EMSGSIZE; |
986 | ||
987 | f = nlmsg_data(nlh); | |
988 | *f = flags; | |
e071041b | 989 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
990 | spc.incnt = si.incnt; |
991 | spc.outcnt = si.outcnt; | |
992 | spc.fwdcnt = si.fwdcnt; | |
993 | spc.inscnt = si.inscnt; | |
994 | spc.outscnt = si.outscnt; | |
995 | spc.fwdscnt = si.fwdscnt; | |
996 | sph.spdhcnt = si.spdhcnt; | |
997 | sph.spdhmcnt = si.spdhmcnt; | |
998 | ||
880a6fab CG |
999 | do { |
1000 | lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); | |
1001 | ||
1002 | spt4.lbits = net->xfrm.policy_hthresh.lbits4; | |
1003 | spt4.rbits = net->xfrm.policy_hthresh.rbits4; | |
1004 | spt6.lbits = net->xfrm.policy_hthresh.lbits6; | |
1005 | spt6.rbits = net->xfrm.policy_hthresh.rbits6; | |
1006 | } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); | |
1007 | ||
1d1e34dd DM |
1008 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
1009 | if (!err) | |
1010 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
880a6fab CG |
1011 | if (!err) |
1012 | err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); | |
1013 | if (!err) | |
1014 | err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); | |
1d1e34dd DM |
1015 | if (err) { |
1016 | nlmsg_cancel(skb, nlh); | |
1017 | return err; | |
1018 | } | |
ecfd6b18 JHS |
1019 | |
1020 | return nlmsg_end(skb, nlh); | |
ecfd6b18 JHS |
1021 | } |
1022 | ||
880a6fab CG |
1023 | static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
1024 | struct nlattr **attrs) | |
1025 | { | |
1026 | struct net *net = sock_net(skb->sk); | |
1027 | struct xfrmu_spdhthresh *thresh4 = NULL; | |
1028 | struct xfrmu_spdhthresh *thresh6 = NULL; | |
1029 | ||
1030 | /* selector prefixlen thresholds to hash policies */ | |
1031 | if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { | |
1032 | struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; | |
1033 | ||
1034 | if (nla_len(rta) < sizeof(*thresh4)) | |
1035 | return -EINVAL; | |
1036 | thresh4 = nla_data(rta); | |
1037 | if (thresh4->lbits > 32 || thresh4->rbits > 32) | |
1038 | return -EINVAL; | |
1039 | } | |
1040 | if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { | |
1041 | struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; | |
1042 | ||
1043 | if (nla_len(rta) < sizeof(*thresh6)) | |
1044 | return -EINVAL; | |
1045 | thresh6 = nla_data(rta); | |
1046 | if (thresh6->lbits > 128 || thresh6->rbits > 128) | |
1047 | return -EINVAL; | |
1048 | } | |
1049 | ||
1050 | if (thresh4 || thresh6) { | |
1051 | write_seqlock(&net->xfrm.policy_hthresh.lock); | |
1052 | if (thresh4) { | |
1053 | net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; | |
1054 | net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; | |
1055 | } | |
1056 | if (thresh6) { | |
1057 | net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; | |
1058 | net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; | |
1059 | } | |
1060 | write_sequnlock(&net->xfrm.policy_hthresh.lock); | |
1061 | ||
1062 | xfrm_policy_hash_rebuild(net); | |
1063 | } | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
ecfd6b18 | 1068 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1069 | struct nlattr **attrs) |
ecfd6b18 | 1070 | { |
a6483b79 | 1071 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 1072 | struct sk_buff *r_skb; |
7b67c857 | 1073 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1074 | u32 sportid = NETLINK_CB(skb).portid; |
ecfd6b18 | 1075 | u32 seq = nlh->nlmsg_seq; |
ecfd6b18 | 1076 | |
7deb2264 | 1077 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
1078 | if (r_skb == NULL) |
1079 | return -ENOMEM; | |
1080 | ||
15e47304 | 1081 | if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) |
ecfd6b18 JHS |
1082 | BUG(); |
1083 | ||
15e47304 | 1084 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
ecfd6b18 JHS |
1085 | } |
1086 | ||
7deb2264 TG |
1087 | static inline size_t xfrm_sadinfo_msgsize(void) |
1088 | { | |
1089 | return NLMSG_ALIGN(4) | |
1090 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
1091 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
1092 | } | |
1093 | ||
e071041b | 1094 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 1095 | u32 portid, u32 seq, u32 flags) |
28d8909b | 1096 | { |
af11e316 JHS |
1097 | struct xfrmk_sadinfo si; |
1098 | struct xfrmu_sadhinfo sh; | |
28d8909b | 1099 | struct nlmsghdr *nlh; |
1d1e34dd | 1100 | int err; |
28d8909b JHS |
1101 | u32 *f; |
1102 | ||
15e47304 | 1103 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
25985edc | 1104 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
1105 | return -EMSGSIZE; |
1106 | ||
1107 | f = nlmsg_data(nlh); | |
1108 | *f = flags; | |
e071041b | 1109 | xfrm_sad_getinfo(net, &si); |
28d8909b | 1110 | |
af11e316 JHS |
1111 | sh.sadhmcnt = si.sadhmcnt; |
1112 | sh.sadhcnt = si.sadhcnt; | |
1113 | ||
1d1e34dd DM |
1114 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
1115 | if (!err) | |
1116 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
1117 | if (err) { | |
1118 | nlmsg_cancel(skb, nlh); | |
1119 | return err; | |
1120 | } | |
28d8909b JHS |
1121 | |
1122 | return nlmsg_end(skb, nlh); | |
28d8909b JHS |
1123 | } |
1124 | ||
1125 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1126 | struct nlattr **attrs) |
28d8909b | 1127 | { |
a6483b79 | 1128 | struct net *net = sock_net(skb->sk); |
28d8909b | 1129 | struct sk_buff *r_skb; |
7b67c857 | 1130 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1131 | u32 sportid = NETLINK_CB(skb).portid; |
28d8909b | 1132 | u32 seq = nlh->nlmsg_seq; |
28d8909b | 1133 | |
7deb2264 | 1134 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1135 | if (r_skb == NULL) |
1136 | return -ENOMEM; | |
1137 | ||
15e47304 | 1138 | if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) |
28d8909b JHS |
1139 | BUG(); |
1140 | ||
15e47304 | 1141 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
28d8909b JHS |
1142 | } |
1143 | ||
22e70050 | 1144 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1145 | struct nlattr **attrs) |
1da177e4 | 1146 | { |
fc34acd3 | 1147 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1148 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1149 | struct xfrm_state *x; |
1150 | struct sk_buff *resp_skb; | |
eb2971b6 | 1151 | int err = -ESRCH; |
1da177e4 | 1152 | |
fc34acd3 | 1153 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1154 | if (x == NULL) |
1155 | goto out_noput; | |
1156 | ||
1157 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1158 | if (IS_ERR(resp_skb)) { | |
1159 | err = PTR_ERR(resp_skb); | |
1160 | } else { | |
15e47304 | 1161 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1162 | } |
1163 | xfrm_state_put(x); | |
1164 | out_noput: | |
1165 | return err; | |
1166 | } | |
1167 | ||
22e70050 | 1168 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1169 | struct nlattr **attrs) |
1da177e4 | 1170 | { |
fc34acd3 | 1171 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1172 | struct xfrm_state *x; |
1173 | struct xfrm_userspi_info *p; | |
1174 | struct sk_buff *resp_skb; | |
1175 | xfrm_address_t *daddr; | |
1176 | int family; | |
1177 | int err; | |
6f26b61e JHS |
1178 | u32 mark; |
1179 | struct xfrm_mark m; | |
1da177e4 | 1180 | |
7b67c857 | 1181 | p = nlmsg_data(nlh); |
776e9dd9 | 1182 | err = verify_spi_info(p->info.id.proto, p->min, p->max); |
1da177e4 LT |
1183 | if (err) |
1184 | goto out_noput; | |
1185 | ||
1186 | family = p->info.family; | |
1187 | daddr = &p->info.id.daddr; | |
1188 | ||
1189 | x = NULL; | |
6f26b61e JHS |
1190 | |
1191 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1192 | if (p->info.seq) { |
6f26b61e | 1193 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
70e94e66 | 1194 | if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { |
1da177e4 LT |
1195 | xfrm_state_put(x); |
1196 | x = NULL; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | if (!x) | |
6f26b61e | 1201 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1202 | p->info.id.proto, daddr, |
1203 | &p->info.saddr, 1, | |
1204 | family); | |
1205 | err = -ENOENT; | |
1206 | if (x == NULL) | |
1207 | goto out_noput; | |
1208 | ||
658b219e HX |
1209 | err = xfrm_alloc_spi(x, p->min, p->max); |
1210 | if (err) | |
1211 | goto out; | |
1da177e4 | 1212 | |
658b219e | 1213 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1214 | if (IS_ERR(resp_skb)) { |
1215 | err = PTR_ERR(resp_skb); | |
1216 | goto out; | |
1217 | } | |
1218 | ||
15e47304 | 1219 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1220 | |
1221 | out: | |
1222 | xfrm_state_put(x); | |
1223 | out_noput: | |
1224 | return err; | |
1225 | } | |
1226 | ||
b798a9ed | 1227 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1228 | { |
1229 | switch (dir) { | |
1230 | case XFRM_POLICY_IN: | |
1231 | case XFRM_POLICY_OUT: | |
1232 | case XFRM_POLICY_FWD: | |
1233 | break; | |
1234 | ||
1235 | default: | |
1236 | return -EINVAL; | |
3ff50b79 | 1237 | } |
1da177e4 LT |
1238 | |
1239 | return 0; | |
1240 | } | |
1241 | ||
b798a9ed | 1242 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1243 | { |
1244 | switch (type) { | |
1245 | case XFRM_POLICY_TYPE_MAIN: | |
1246 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1247 | case XFRM_POLICY_TYPE_SUB: | |
1248 | #endif | |
1249 | break; | |
1250 | ||
1251 | default: | |
1252 | return -EINVAL; | |
3ff50b79 | 1253 | } |
f7b6983f MN |
1254 | |
1255 | return 0; | |
1256 | } | |
1257 | ||
1da177e4 LT |
1258 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1259 | { | |
e682adf0 FD |
1260 | int ret; |
1261 | ||
1da177e4 LT |
1262 | switch (p->share) { |
1263 | case XFRM_SHARE_ANY: | |
1264 | case XFRM_SHARE_SESSION: | |
1265 | case XFRM_SHARE_USER: | |
1266 | case XFRM_SHARE_UNIQUE: | |
1267 | break; | |
1268 | ||
1269 | default: | |
1270 | return -EINVAL; | |
3ff50b79 | 1271 | } |
1da177e4 LT |
1272 | |
1273 | switch (p->action) { | |
1274 | case XFRM_POLICY_ALLOW: | |
1275 | case XFRM_POLICY_BLOCK: | |
1276 | break; | |
1277 | ||
1278 | default: | |
1279 | return -EINVAL; | |
3ff50b79 | 1280 | } |
1da177e4 LT |
1281 | |
1282 | switch (p->sel.family) { | |
1283 | case AF_INET: | |
1284 | break; | |
1285 | ||
1286 | case AF_INET6: | |
dfd56b8b | 1287 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1288 | break; |
1289 | #else | |
1290 | return -EAFNOSUPPORT; | |
1291 | #endif | |
1292 | ||
1293 | default: | |
1294 | return -EINVAL; | |
3ff50b79 | 1295 | } |
1da177e4 | 1296 | |
e682adf0 FD |
1297 | ret = verify_policy_dir(p->dir); |
1298 | if (ret) | |
1299 | return ret; | |
1300 | if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir)) | |
1301 | return -EINVAL; | |
1302 | ||
1303 | return 0; | |
1da177e4 LT |
1304 | } |
1305 | ||
5424f32e | 1306 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1307 | { |
5424f32e | 1308 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1309 | struct xfrm_user_sec_ctx *uctx; |
1310 | ||
1311 | if (!rt) | |
1312 | return 0; | |
1313 | ||
5424f32e | 1314 | uctx = nla_data(rt); |
52a4c640 | 1315 | return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); |
df71837d TJ |
1316 | } |
1317 | ||
1da177e4 LT |
1318 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1319 | int nr) | |
1320 | { | |
1321 | int i; | |
1322 | ||
1323 | xp->xfrm_nr = nr; | |
1324 | for (i = 0; i < nr; i++, ut++) { | |
1325 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1326 | ||
1327 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1328 | memcpy(&t->saddr, &ut->saddr, | |
1329 | sizeof(xfrm_address_t)); | |
1330 | t->reqid = ut->reqid; | |
1331 | t->mode = ut->mode; | |
1332 | t->share = ut->share; | |
1333 | t->optional = ut->optional; | |
1334 | t->aalgos = ut->aalgos; | |
1335 | t->ealgos = ut->ealgos; | |
1336 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1337 | /* If all masks are ~0, then we allow all algorithms. */ |
1338 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1339 | t->encap_family = ut->family; |
1da177e4 LT |
1340 | } |
1341 | } | |
1342 | ||
b4ad86bf DM |
1343 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1344 | { | |
1345 | int i; | |
1346 | ||
1347 | if (nr > XFRM_MAX_DEPTH) | |
1348 | return -EINVAL; | |
1349 | ||
1350 | for (i = 0; i < nr; i++) { | |
1351 | /* We never validated the ut->family value, so many | |
1352 | * applications simply leave it at zero. The check was | |
1353 | * never made and ut->family was ignored because all | |
1354 | * templates could be assumed to have the same family as | |
1355 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1356 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1357 | */ | |
1358 | if (!ut[i].family) | |
1359 | ut[i].family = family; | |
1360 | ||
1361 | switch (ut[i].family) { | |
1362 | case AF_INET: | |
1363 | break; | |
dfd56b8b | 1364 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1365 | case AF_INET6: |
1366 | break; | |
1367 | #endif | |
1368 | default: | |
1369 | return -EINVAL; | |
3ff50b79 | 1370 | } |
b4ad86bf DM |
1371 | } |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
5424f32e | 1376 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1377 | { |
5424f32e | 1378 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1379 | |
1380 | if (!rt) { | |
1381 | pol->xfrm_nr = 0; | |
1382 | } else { | |
5424f32e TG |
1383 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1384 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1385 | int err; |
1da177e4 | 1386 | |
b4ad86bf DM |
1387 | err = validate_tmpl(nr, utmpl, pol->family); |
1388 | if (err) | |
1389 | return err; | |
1da177e4 | 1390 | |
5424f32e | 1391 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1392 | } |
1393 | return 0; | |
1394 | } | |
1395 | ||
5424f32e | 1396 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1397 | { |
5424f32e | 1398 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1399 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1400 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1401 | int err; |
1402 | ||
1403 | if (rt) { | |
5424f32e | 1404 | upt = nla_data(rt); |
f7b6983f MN |
1405 | type = upt->type; |
1406 | } | |
1407 | ||
1408 | err = verify_policy_type(type); | |
1409 | if (err) | |
1410 | return err; | |
1411 | ||
1412 | *tp = type; | |
1413 | return 0; | |
1414 | } | |
1415 | ||
1da177e4 LT |
1416 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1417 | { | |
1418 | xp->priority = p->priority; | |
1419 | xp->index = p->index; | |
1420 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1421 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1422 | xp->action = p->action; | |
1423 | xp->flags = p->flags; | |
1424 | xp->family = p->sel.family; | |
1425 | /* XXX xp->share = p->share; */ | |
1426 | } | |
1427 | ||
1428 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1429 | { | |
7b789836 | 1430 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
1431 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
1432 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1433 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1434 | p->priority = xp->priority; | |
1435 | p->index = xp->index; | |
1436 | p->sel.family = xp->family; | |
1437 | p->dir = dir; | |
1438 | p->action = xp->action; | |
1439 | p->flags = xp->flags; | |
1440 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1441 | } | |
1442 | ||
fc34acd3 | 1443 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1444 | { |
fc34acd3 | 1445 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1446 | int err; |
1447 | ||
1448 | if (!xp) { | |
1449 | *errp = -ENOMEM; | |
1450 | return NULL; | |
1451 | } | |
1452 | ||
1453 | copy_from_user_policy(xp, p); | |
df71837d | 1454 | |
35a7aa08 | 1455 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1456 | if (err) |
1457 | goto error; | |
1458 | ||
35a7aa08 TG |
1459 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1460 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1461 | if (err) |
1462 | goto error; | |
1da177e4 | 1463 | |
295fae56 JHS |
1464 | xfrm_mark_get(attrs, &xp->mark); |
1465 | ||
1da177e4 | 1466 | return xp; |
f7b6983f MN |
1467 | error: |
1468 | *errp = err; | |
12a169e7 | 1469 | xp->walk.dead = 1; |
64c31b3f | 1470 | xfrm_policy_destroy(xp); |
f7b6983f | 1471 | return NULL; |
1da177e4 LT |
1472 | } |
1473 | ||
22e70050 | 1474 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1475 | struct nlattr **attrs) |
1da177e4 | 1476 | { |
fc34acd3 | 1477 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1478 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1479 | struct xfrm_policy *xp; |
26b15dad | 1480 | struct km_event c; |
1da177e4 LT |
1481 | int err; |
1482 | int excl; | |
1483 | ||
1484 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1485 | if (err) |
1486 | return err; | |
35a7aa08 | 1487 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1488 | if (err) |
1489 | return err; | |
1490 | ||
fc34acd3 | 1491 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1492 | if (!xp) |
1493 | return err; | |
1494 | ||
25985edc | 1495 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1496 | * Aha! this is anti-netlink really i.e more pfkey derived |
1497 | * in netlink excl is a flag and you wouldnt need | |
1498 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1499 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1500 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2e71029e | 1501 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 1502 | |
1da177e4 | 1503 | if (err) { |
03e1ad7b | 1504 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1505 | kfree(xp); |
1506 | return err; | |
1507 | } | |
1508 | ||
f60f6b8f | 1509 | c.event = nlh->nlmsg_type; |
26b15dad | 1510 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1511 | c.portid = nlh->nlmsg_pid; |
26b15dad JHS |
1512 | km_policy_notify(xp, p->dir, &c); |
1513 | ||
1da177e4 LT |
1514 | xfrm_pol_put(xp); |
1515 | ||
1516 | return 0; | |
1517 | } | |
1518 | ||
1519 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1520 | { | |
1521 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1522 | int i; | |
1523 | ||
1524 | if (xp->xfrm_nr == 0) | |
1525 | return 0; | |
1526 | ||
1527 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1528 | struct xfrm_user_tmpl *up = &vec[i]; | |
1529 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1530 | ||
1f86840f | 1531 | memset(up, 0, sizeof(*up)); |
1da177e4 | 1532 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
8511d01d | 1533 | up->family = kp->encap_family; |
1da177e4 LT |
1534 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1535 | up->reqid = kp->reqid; | |
1536 | up->mode = kp->mode; | |
1537 | up->share = kp->share; | |
1538 | up->optional = kp->optional; | |
1539 | up->aalgos = kp->aalgos; | |
1540 | up->ealgos = kp->ealgos; | |
1541 | up->calgos = kp->calgos; | |
1542 | } | |
df71837d | 1543 | |
c0144bea TG |
1544 | return nla_put(skb, XFRMA_TMPL, |
1545 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1546 | } |
1547 | ||
1548 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1549 | { | |
1550 | if (x->security) { | |
1551 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1552 | } |
1553 | return 0; | |
0d681623 | 1554 | } |
df71837d | 1555 | |
0d681623 SH |
1556 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1557 | { | |
1d1e34dd | 1558 | if (xp->security) |
0d681623 | 1559 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1560 | return 0; |
df71837d | 1561 | } |
cfbfd45a TG |
1562 | static inline size_t userpolicy_type_attrsize(void) |
1563 | { | |
1564 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1565 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1566 | #else | |
1567 | return 0; | |
1568 | #endif | |
1569 | } | |
df71837d | 1570 | |
f7b6983f | 1571 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1572 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1573 | { |
c0144bea TG |
1574 | struct xfrm_userpolicy_type upt = { |
1575 | .type = type, | |
1576 | }; | |
f7b6983f | 1577 | |
c0144bea | 1578 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1579 | } |
1580 | ||
1581 | #else | |
b798a9ed | 1582 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1583 | { |
1584 | return 0; | |
1585 | } | |
1586 | #endif | |
1587 | ||
1da177e4 LT |
1588 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1589 | { | |
1590 | struct xfrm_dump_info *sp = ptr; | |
1591 | struct xfrm_userpolicy_info *p; | |
1592 | struct sk_buff *in_skb = sp->in_skb; | |
1593 | struct sk_buff *skb = sp->out_skb; | |
1594 | struct nlmsghdr *nlh; | |
1d1e34dd | 1595 | int err; |
1da177e4 | 1596 | |
15e47304 | 1597 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
79b8b7f4 TG |
1598 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
1599 | if (nlh == NULL) | |
1600 | return -EMSGSIZE; | |
1da177e4 | 1601 | |
7b67c857 | 1602 | p = nlmsg_data(nlh); |
1da177e4 | 1603 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1604 | err = copy_to_user_tmpl(xp, skb); |
1605 | if (!err) | |
1606 | err = copy_to_user_sec_ctx(xp, skb); | |
1607 | if (!err) | |
1608 | err = copy_to_user_policy_type(xp->type, skb); | |
1609 | if (!err) | |
1610 | err = xfrm_mark_put(skb, &xp->mark); | |
1611 | if (err) { | |
1612 | nlmsg_cancel(skb, nlh); | |
1613 | return err; | |
1614 | } | |
9825069d | 1615 | nlmsg_end(skb, nlh); |
1da177e4 | 1616 | return 0; |
1da177e4 LT |
1617 | } |
1618 | ||
4c563f76 TT |
1619 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1620 | { | |
1621 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
283bc9f3 | 1622 | struct net *net = sock_net(cb->skb->sk); |
4c563f76 | 1623 | |
283bc9f3 | 1624 | xfrm_policy_walk_done(walk, net); |
4c563f76 TT |
1625 | return 0; |
1626 | } | |
1627 | ||
1da177e4 LT |
1628 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1629 | { | |
fc34acd3 | 1630 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1631 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1632 | struct xfrm_dump_info info; |
1633 | ||
4c563f76 TT |
1634 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1635 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1636 | ||
1da177e4 LT |
1637 | info.in_skb = cb->skb; |
1638 | info.out_skb = skb; | |
1639 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1640 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1641 | |
1642 | if (!cb->args[0]) { | |
1643 | cb->args[0] = 1; | |
1644 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1645 | } | |
1646 | ||
fc34acd3 | 1647 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1648 | |
1649 | return skb->len; | |
1650 | } | |
1651 | ||
1652 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1653 | struct xfrm_policy *xp, | |
1654 | int dir, u32 seq) | |
1655 | { | |
1656 | struct xfrm_dump_info info; | |
1657 | struct sk_buff *skb; | |
c2546372 | 1658 | int err; |
1da177e4 | 1659 | |
7deb2264 | 1660 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1661 | if (!skb) |
1662 | return ERR_PTR(-ENOMEM); | |
1663 | ||
1da177e4 LT |
1664 | info.in_skb = in_skb; |
1665 | info.out_skb = skb; | |
1666 | info.nlmsg_seq = seq; | |
1667 | info.nlmsg_flags = 0; | |
1da177e4 | 1668 | |
c2546372 MK |
1669 | err = dump_one_policy(xp, dir, 0, &info); |
1670 | if (err) { | |
1da177e4 | 1671 | kfree_skb(skb); |
c2546372 | 1672 | return ERR_PTR(err); |
1da177e4 LT |
1673 | } |
1674 | ||
1675 | return skb; | |
1676 | } | |
1677 | ||
22e70050 | 1678 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1679 | struct nlattr **attrs) |
1da177e4 | 1680 | { |
fc34acd3 | 1681 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1682 | struct xfrm_policy *xp; |
1683 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1684 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1685 | int err; |
26b15dad | 1686 | struct km_event c; |
1da177e4 | 1687 | int delete; |
295fae56 JHS |
1688 | struct xfrm_mark m; |
1689 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1690 | |
7b67c857 | 1691 | p = nlmsg_data(nlh); |
1da177e4 LT |
1692 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1693 | ||
35a7aa08 | 1694 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1695 | if (err) |
1696 | return err; | |
1697 | ||
1da177e4 LT |
1698 | err = verify_policy_dir(p->dir); |
1699 | if (err) | |
1700 | return err; | |
1701 | ||
1702 | if (p->index) | |
295fae56 | 1703 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1704 | else { |
5424f32e | 1705 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1706 | struct xfrm_sec_ctx *ctx; |
df71837d | 1707 | |
35a7aa08 | 1708 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1709 | if (err) |
1710 | return err; | |
1711 | ||
2c8dd116 | 1712 | ctx = NULL; |
df71837d | 1713 | if (rt) { |
5424f32e | 1714 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1715 | |
52a4c640 | 1716 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 1717 | if (err) |
df71837d | 1718 | return err; |
2c8dd116 | 1719 | } |
295fae56 | 1720 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1721 | ctx, delete, &err); |
03e1ad7b | 1722 | security_xfrm_policy_free(ctx); |
df71837d | 1723 | } |
1da177e4 LT |
1724 | if (xp == NULL) |
1725 | return -ENOENT; | |
1726 | ||
1727 | if (!delete) { | |
1728 | struct sk_buff *resp_skb; | |
1729 | ||
1730 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1731 | if (IS_ERR(resp_skb)) { | |
1732 | err = PTR_ERR(resp_skb); | |
1733 | } else { | |
a6483b79 | 1734 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
15e47304 | 1735 | NETLINK_CB(skb).portid); |
1da177e4 | 1736 | } |
26b15dad | 1737 | } else { |
2e71029e | 1738 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
1739 | |
1740 | if (err != 0) | |
c8c05a8e | 1741 | goto out; |
13fcfbb0 | 1742 | |
e7443892 | 1743 | c.data.byid = p->index; |
f60f6b8f | 1744 | c.event = nlh->nlmsg_type; |
26b15dad | 1745 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1746 | c.portid = nlh->nlmsg_pid; |
26b15dad | 1747 | km_policy_notify(xp, p->dir, &c); |
1da177e4 LT |
1748 | } |
1749 | ||
c8c05a8e | 1750 | out: |
ef41aaa0 | 1751 | xfrm_pol_put(xp); |
e4c17216 PM |
1752 | if (delete && err == 0) |
1753 | xfrm_garbage_collect(net); | |
1da177e4 LT |
1754 | return err; |
1755 | } | |
1756 | ||
22e70050 | 1757 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1758 | struct nlattr **attrs) |
1da177e4 | 1759 | { |
fc34acd3 | 1760 | struct net *net = sock_net(skb->sk); |
26b15dad | 1761 | struct km_event c; |
7b67c857 | 1762 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
4aa2e62c | 1763 | int err; |
1da177e4 | 1764 | |
2e71029e | 1765 | err = xfrm_state_flush(net, p->proto, true); |
9e64cc95 JHS |
1766 | if (err) { |
1767 | if (err == -ESRCH) /* empty table */ | |
1768 | return 0; | |
069c474e | 1769 | return err; |
9e64cc95 | 1770 | } |
bf08867f | 1771 | c.data.proto = p->proto; |
f60f6b8f | 1772 | c.event = nlh->nlmsg_type; |
26b15dad | 1773 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1774 | c.portid = nlh->nlmsg_pid; |
7067802e | 1775 | c.net = net; |
26b15dad JHS |
1776 | km_state_notify(NULL, &c); |
1777 | ||
1da177e4 LT |
1778 | return 0; |
1779 | } | |
1780 | ||
d8647b79 | 1781 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1782 | { |
d8647b79 SK |
1783 | size_t replay_size = x->replay_esn ? |
1784 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1785 | sizeof(struct xfrm_replay_state); | |
1786 | ||
7deb2264 | 1787 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1788 | + nla_total_size(replay_size) |
7deb2264 | 1789 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1790 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1791 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1792 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1793 | } | |
d51d081d | 1794 | |
214e005b | 1795 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1796 | { |
1797 | struct xfrm_aevent_id *id; | |
1798 | struct nlmsghdr *nlh; | |
1d1e34dd | 1799 | int err; |
d51d081d | 1800 | |
15e47304 | 1801 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
79b8b7f4 TG |
1802 | if (nlh == NULL) |
1803 | return -EMSGSIZE; | |
d51d081d | 1804 | |
7b67c857 | 1805 | id = nlmsg_data(nlh); |
9b7a787d | 1806 | memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); |
d51d081d JHS |
1807 | id->sa_id.spi = x->id.spi; |
1808 | id->sa_id.family = x->props.family; | |
1809 | id->sa_id.proto = x->id.proto; | |
9b7a787d | 1810 | memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); |
2b5f6dcc | 1811 | id->reqid = x->props.reqid; |
d51d081d JHS |
1812 | id->flags = c->data.aevent; |
1813 | ||
d0fde795 | 1814 | if (x->replay_esn) { |
1d1e34dd DM |
1815 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1816 | xfrm_replay_state_esn_len(x->replay_esn), | |
1817 | x->replay_esn); | |
d0fde795 | 1818 | } else { |
1d1e34dd DM |
1819 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1820 | &x->replay); | |
d0fde795 | 1821 | } |
1d1e34dd DM |
1822 | if (err) |
1823 | goto out_cancel; | |
1824 | err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
1825 | if (err) | |
1826 | goto out_cancel; | |
d51d081d | 1827 | |
1d1e34dd DM |
1828 | if (id->flags & XFRM_AE_RTHR) { |
1829 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1830 | if (err) | |
1831 | goto out_cancel; | |
1832 | } | |
1833 | if (id->flags & XFRM_AE_ETHR) { | |
1834 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1835 | x->replay_maxage * 10 / HZ); | |
1836 | if (err) | |
1837 | goto out_cancel; | |
1838 | } | |
1839 | err = xfrm_mark_put(skb, &x->mark); | |
1840 | if (err) | |
1841 | goto out_cancel; | |
6f26b61e | 1842 | |
9825069d | 1843 | return nlmsg_end(skb, nlh); |
d51d081d | 1844 | |
1d1e34dd | 1845 | out_cancel: |
9825069d | 1846 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1847 | return err; |
d51d081d JHS |
1848 | } |
1849 | ||
22e70050 | 1850 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1851 | struct nlattr **attrs) |
d51d081d | 1852 | { |
fc34acd3 | 1853 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1854 | struct xfrm_state *x; |
1855 | struct sk_buff *r_skb; | |
1856 | int err; | |
1857 | struct km_event c; | |
6f26b61e JHS |
1858 | u32 mark; |
1859 | struct xfrm_mark m; | |
7b67c857 | 1860 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1861 | struct xfrm_usersa_id *id = &p->sa_id; |
1862 | ||
6f26b61e JHS |
1863 | mark = xfrm_mark_get(attrs, &m); |
1864 | ||
1865 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1866 | if (x == NULL) |
d51d081d | 1867 | return -ESRCH; |
d8647b79 SK |
1868 | |
1869 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1870 | if (r_skb == NULL) { | |
1871 | xfrm_state_put(x); | |
1872 | return -ENOMEM; | |
d51d081d JHS |
1873 | } |
1874 | ||
1875 | /* | |
1876 | * XXX: is this lock really needed - none of the other | |
1877 | * gets lock (the concern is things getting updated | |
1878 | * while we are still reading) - jhs | |
1879 | */ | |
1880 | spin_lock_bh(&x->lock); | |
1881 | c.data.aevent = p->flags; | |
1882 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1883 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1884 | |
1885 | if (build_aevent(r_skb, x, &c) < 0) | |
1886 | BUG(); | |
15e47304 | 1887 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); |
d51d081d JHS |
1888 | spin_unlock_bh(&x->lock); |
1889 | xfrm_state_put(x); | |
1890 | return err; | |
1891 | } | |
1892 | ||
22e70050 | 1893 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1894 | struct nlattr **attrs) |
d51d081d | 1895 | { |
fc34acd3 | 1896 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1897 | struct xfrm_state *x; |
1898 | struct km_event c; | |
02d0892f | 1899 | int err = -EINVAL; |
6f26b61e JHS |
1900 | u32 mark = 0; |
1901 | struct xfrm_mark m; | |
7b67c857 | 1902 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1903 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1904 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1905 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1906 | |
d8647b79 | 1907 | if (!lt && !rp && !re) |
d51d081d JHS |
1908 | return err; |
1909 | ||
1910 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1911 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1912 | return err; | |
1913 | ||
6f26b61e JHS |
1914 | mark = xfrm_mark_get(attrs, &m); |
1915 | ||
1916 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1917 | if (x == NULL) |
1918 | return -ESRCH; | |
1919 | ||
1920 | if (x->km.state != XFRM_STATE_VALID) | |
1921 | goto out; | |
1922 | ||
4479ff76 | 1923 | err = xfrm_replay_verify_len(x->replay_esn, re); |
e2b19125 SK |
1924 | if (err) |
1925 | goto out; | |
1926 | ||
d51d081d | 1927 | spin_lock_bh(&x->lock); |
e3ac104d | 1928 | xfrm_update_ae_params(x, attrs, 1); |
d51d081d | 1929 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1930 | |
1931 | c.event = nlh->nlmsg_type; | |
1932 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1933 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1934 | c.data.aevent = XFRM_AE_CU; |
1935 | km_state_notify(x, &c); | |
1936 | err = 0; | |
1937 | out: | |
1938 | xfrm_state_put(x); | |
1939 | return err; | |
1940 | } | |
1941 | ||
22e70050 | 1942 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1943 | struct nlattr **attrs) |
1da177e4 | 1944 | { |
fc34acd3 | 1945 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1946 | struct km_event c; |
b798a9ed | 1947 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1948 | int err; |
1949 | ||
35a7aa08 | 1950 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1951 | if (err) |
1952 | return err; | |
26b15dad | 1953 | |
2e71029e | 1954 | err = xfrm_policy_flush(net, type, true); |
2f1eb65f JHS |
1955 | if (err) { |
1956 | if (err == -ESRCH) /* empty table */ | |
1957 | return 0; | |
069c474e | 1958 | return err; |
2f1eb65f JHS |
1959 | } |
1960 | ||
f7b6983f | 1961 | c.data.type = type; |
f60f6b8f | 1962 | c.event = nlh->nlmsg_type; |
26b15dad | 1963 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1964 | c.portid = nlh->nlmsg_pid; |
7067802e | 1965 | c.net = net; |
26b15dad | 1966 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1967 | return 0; |
1968 | } | |
1969 | ||
22e70050 | 1970 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1971 | struct nlattr **attrs) |
6c5c8ca7 | 1972 | { |
fc34acd3 | 1973 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1974 | struct xfrm_policy *xp; |
7b67c857 | 1975 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1976 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1977 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1978 | int err = -ENOENT; |
295fae56 JHS |
1979 | struct xfrm_mark m; |
1980 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1981 | |
35a7aa08 | 1982 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1983 | if (err) |
1984 | return err; | |
1985 | ||
c8bf4d04 TT |
1986 | err = verify_policy_dir(p->dir); |
1987 | if (err) | |
1988 | return err; | |
1989 | ||
6c5c8ca7 | 1990 | if (p->index) |
295fae56 | 1991 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1992 | else { |
5424f32e | 1993 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1994 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1995 | |
35a7aa08 | 1996 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1997 | if (err) |
1998 | return err; | |
1999 | ||
2c8dd116 | 2000 | ctx = NULL; |
6c5c8ca7 | 2001 | if (rt) { |
5424f32e | 2002 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 2003 | |
52a4c640 | 2004 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 2005 | if (err) |
6c5c8ca7 | 2006 | return err; |
2c8dd116 | 2007 | } |
295fae56 | 2008 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 2009 | &p->sel, ctx, 0, &err); |
03e1ad7b | 2010 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 2011 | } |
6c5c8ca7 | 2012 | if (xp == NULL) |
ef41aaa0 | 2013 | return -ENOENT; |
03e1ad7b | 2014 | |
ea2dea9d | 2015 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 2016 | goto out; |
6c5c8ca7 | 2017 | |
6c5c8ca7 JHS |
2018 | err = 0; |
2019 | if (up->hard) { | |
2020 | xfrm_policy_delete(xp, p->dir); | |
2e71029e | 2021 | xfrm_audit_policy_delete(xp, 1, true); |
6c5c8ca7 JHS |
2022 | } else { |
2023 | // reset the timers here? | |
62db5cfd | 2024 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 | 2025 | } |
c6bb8136 | 2026 | km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); |
6c5c8ca7 JHS |
2027 | |
2028 | out: | |
2029 | xfrm_pol_put(xp); | |
2030 | return err; | |
2031 | } | |
2032 | ||
22e70050 | 2033 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2034 | struct nlattr **attrs) |
53bc6b4d | 2035 | { |
fc34acd3 | 2036 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
2037 | struct xfrm_state *x; |
2038 | int err; | |
7b67c857 | 2039 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 2040 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 2041 | struct xfrm_mark m; |
928497f0 | 2042 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 2043 | |
6f26b61e | 2044 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 2045 | |
3a765aa5 | 2046 | err = -ENOENT; |
53bc6b4d JHS |
2047 | if (x == NULL) |
2048 | return err; | |
2049 | ||
53bc6b4d | 2050 | spin_lock_bh(&x->lock); |
3a765aa5 | 2051 | err = -EINVAL; |
53bc6b4d JHS |
2052 | if (x->km.state != XFRM_STATE_VALID) |
2053 | goto out; | |
c6bb8136 | 2054 | km_state_expired(x, ue->hard, nlh->nlmsg_pid); |
53bc6b4d | 2055 | |
161a09e7 | 2056 | if (ue->hard) { |
53bc6b4d | 2057 | __xfrm_state_delete(x); |
2e71029e | 2058 | xfrm_audit_state_delete(x, 1, true); |
161a09e7 | 2059 | } |
3a765aa5 | 2060 | err = 0; |
53bc6b4d JHS |
2061 | out: |
2062 | spin_unlock_bh(&x->lock); | |
2063 | xfrm_state_put(x); | |
2064 | return err; | |
2065 | } | |
2066 | ||
22e70050 | 2067 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2068 | struct nlattr **attrs) |
980ebd25 | 2069 | { |
fc34acd3 | 2070 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
2071 | struct xfrm_policy *xp; |
2072 | struct xfrm_user_tmpl *ut; | |
2073 | int i; | |
5424f32e | 2074 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 2075 | struct xfrm_mark mark; |
980ebd25 | 2076 | |
7b67c857 | 2077 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 2078 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
2079 | int err = -ENOMEM; |
2080 | ||
2081 | if (!x) | |
d8eb9307 | 2082 | goto nomem; |
980ebd25 | 2083 | |
6f26b61e JHS |
2084 | xfrm_mark_get(attrs, &mark); |
2085 | ||
980ebd25 | 2086 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2087 | if (err) |
2088 | goto bad_policy; | |
980ebd25 JHS |
2089 | |
2090 | /* build an XP */ | |
fc34acd3 | 2091 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2092 | if (!xp) |
2093 | goto free_state; | |
980ebd25 JHS |
2094 | |
2095 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2096 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2097 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2098 | xp->mark.m = x->mark.m = mark.m; |
2099 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2100 | ut = nla_data(rt); |
980ebd25 JHS |
2101 | /* extract the templates and for each call km_key */ |
2102 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2103 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2104 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2105 | x->props.mode = t->mode; | |
2106 | x->props.reqid = t->reqid; | |
2107 | x->props.family = ut->family; | |
2108 | t->aalgos = ua->aalgos; | |
2109 | t->ealgos = ua->ealgos; | |
2110 | t->calgos = ua->calgos; | |
2111 | err = km_query(x, t, xp); | |
2112 | ||
2113 | } | |
2114 | ||
2115 | kfree(x); | |
2116 | kfree(xp); | |
2117 | ||
2118 | return 0; | |
d8eb9307 IJ |
2119 | |
2120 | bad_policy: | |
62db5cfd | 2121 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2122 | free_state: |
2123 | kfree(x); | |
2124 | nomem: | |
2125 | return err; | |
980ebd25 JHS |
2126 | } |
2127 | ||
5c79de6e | 2128 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2129 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2130 | struct xfrm_kmaddress *k, |
5424f32e | 2131 | struct nlattr **attrs, int *num) |
5c79de6e | 2132 | { |
5424f32e | 2133 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2134 | struct xfrm_user_migrate *um; |
2135 | int i, num_migrate; | |
2136 | ||
13c1d189 AE |
2137 | if (k != NULL) { |
2138 | struct xfrm_user_kmaddress *uk; | |
2139 | ||
2140 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2141 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2142 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2143 | k->family = uk->family; | |
2144 | k->reserved = uk->reserved; | |
2145 | } | |
2146 | ||
5424f32e TG |
2147 | um = nla_data(rt); |
2148 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2149 | |
2150 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2151 | return -EINVAL; | |
2152 | ||
2153 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2154 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2155 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2156 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2157 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2158 | ||
2159 | ma->proto = um->proto; | |
2160 | ma->mode = um->mode; | |
2161 | ma->reqid = um->reqid; | |
2162 | ||
2163 | ma->old_family = um->old_family; | |
2164 | ma->new_family = um->new_family; | |
2165 | } | |
2166 | ||
2167 | *num = i; | |
2168 | return 0; | |
2169 | } | |
2170 | ||
2171 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2172 | struct nlattr **attrs) |
5c79de6e | 2173 | { |
7b67c857 | 2174 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2175 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2176 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2177 | u8 type; |
2178 | int err; | |
2179 | int n = 0; | |
8d549c4f | 2180 | struct net *net = sock_net(skb->sk); |
5c79de6e | 2181 | |
35a7aa08 | 2182 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2183 | return -EINVAL; |
5c79de6e | 2184 | |
13c1d189 AE |
2185 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2186 | ||
5424f32e | 2187 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2188 | if (err) |
2189 | return err; | |
2190 | ||
13c1d189 | 2191 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2192 | if (err) |
2193 | return err; | |
2194 | ||
2195 | if (!n) | |
2196 | return 0; | |
2197 | ||
8d549c4f | 2198 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net); |
5c79de6e SS |
2199 | |
2200 | return 0; | |
2201 | } | |
2202 | #else | |
2203 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2204 | struct nlattr **attrs) |
5c79de6e SS |
2205 | { |
2206 | return -ENOPROTOOPT; | |
2207 | } | |
2208 | #endif | |
2209 | ||
2210 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2211 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2212 | { |
2213 | struct xfrm_user_migrate um; | |
2214 | ||
2215 | memset(&um, 0, sizeof(um)); | |
2216 | um.proto = m->proto; | |
2217 | um.mode = m->mode; | |
2218 | um.reqid = m->reqid; | |
2219 | um.old_family = m->old_family; | |
2220 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2221 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2222 | um.new_family = m->new_family; | |
2223 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2224 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2225 | ||
c0144bea | 2226 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2227 | } |
2228 | ||
183cad12 | 2229 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2230 | { |
2231 | struct xfrm_user_kmaddress uk; | |
2232 | ||
2233 | memset(&uk, 0, sizeof(uk)); | |
2234 | uk.family = k->family; | |
2235 | uk.reserved = k->reserved; | |
2236 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2237 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2238 | |
2239 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2240 | } | |
2241 | ||
2242 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2243 | { |
2244 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2245 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2246 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2247 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2248 | } |
2249 | ||
183cad12 DM |
2250 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2251 | int num_migrate, const struct xfrm_kmaddress *k, | |
2252 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2253 | { |
183cad12 | 2254 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2255 | struct xfrm_userpolicy_id *pol_id; |
2256 | struct nlmsghdr *nlh; | |
1d1e34dd | 2257 | int i, err; |
5c79de6e | 2258 | |
79b8b7f4 TG |
2259 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2260 | if (nlh == NULL) | |
2261 | return -EMSGSIZE; | |
5c79de6e | 2262 | |
7b67c857 | 2263 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2264 | /* copy data from selector, dir, and type to the pol_id */ |
2265 | memset(pol_id, 0, sizeof(*pol_id)); | |
2266 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2267 | pol_id->dir = dir; | |
2268 | ||
1d1e34dd DM |
2269 | if (k != NULL) { |
2270 | err = copy_to_user_kmaddress(k, skb); | |
2271 | if (err) | |
2272 | goto out_cancel; | |
2273 | } | |
2274 | err = copy_to_user_policy_type(type, skb); | |
2275 | if (err) | |
2276 | goto out_cancel; | |
5c79de6e | 2277 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2278 | err = copy_to_user_migrate(mp, skb); |
2279 | if (err) | |
2280 | goto out_cancel; | |
5c79de6e SS |
2281 | } |
2282 | ||
9825069d | 2283 | return nlmsg_end(skb, nlh); |
1d1e34dd DM |
2284 | |
2285 | out_cancel: | |
9825069d | 2286 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2287 | return err; |
5c79de6e SS |
2288 | } |
2289 | ||
183cad12 DM |
2290 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2291 | const struct xfrm_migrate *m, int num_migrate, | |
2292 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2293 | { |
a6483b79 | 2294 | struct net *net = &init_net; |
5c79de6e | 2295 | struct sk_buff *skb; |
5c79de6e | 2296 | |
13c1d189 | 2297 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2298 | if (skb == NULL) |
2299 | return -ENOMEM; | |
2300 | ||
2301 | /* build migrate */ | |
13c1d189 | 2302 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2303 | BUG(); |
2304 | ||
21ee543e | 2305 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); |
5c79de6e SS |
2306 | } |
2307 | #else | |
183cad12 DM |
2308 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2309 | const struct xfrm_migrate *m, int num_migrate, | |
2310 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2311 | { |
2312 | return -ENOPROTOOPT; | |
2313 | } | |
2314 | #endif | |
d51d081d | 2315 | |
a7bd9a45 | 2316 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2317 | |
2318 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2319 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2320 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2321 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2322 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2323 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2324 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2325 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2326 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2327 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2328 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2329 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2330 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2331 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2332 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2333 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2334 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2335 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2336 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 | 2337 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
880a6fab | 2338 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
a7bd9a45 | 2339 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
1da177e4 LT |
2340 | }; |
2341 | ||
492b558b TG |
2342 | #undef XMSGSIZE |
2343 | ||
cf5cb79f | 2344 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2345 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2346 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2347 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2348 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2349 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2350 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2351 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2352 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2353 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2354 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2355 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2356 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2357 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2358 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2359 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2360 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2361 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2362 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2363 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2364 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2365 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2366 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2367 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
a947b0a9 | 2368 | [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, |
d3623099 | 2369 | [XFRMA_PROTO] = { .type = NLA_U8 }, |
870a2df4 | 2370 | [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, |
cf5cb79f TG |
2371 | }; |
2372 | ||
880a6fab CG |
2373 | static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { |
2374 | [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2375 | [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2376 | }; | |
2377 | ||
05600a79 | 2378 | static const struct xfrm_link { |
5424f32e | 2379 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2380 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2381 | int (*done)(struct netlink_callback *); |
880a6fab CG |
2382 | const struct nla_policy *nla_pol; |
2383 | int nla_max; | |
492b558b TG |
2384 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2385 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2386 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2387 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2388 | .dump = xfrm_dump_sa, |
2389 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2390 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2391 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2392 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2393 | .dump = xfrm_dump_policy, |
2394 | .done = xfrm_dump_policy_done }, | |
492b558b | 2395 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2396 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2397 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2398 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2399 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2400 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2401 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2402 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2403 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2404 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2405 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2406 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
880a6fab CG |
2407 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, |
2408 | .nla_pol = xfrma_spd_policy, | |
2409 | .nla_max = XFRMA_SPD_MAX }, | |
ecfd6b18 | 2410 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2411 | }; |
2412 | ||
1d00a4eb | 2413 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2414 | { |
a6483b79 | 2415 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2416 | struct nlattr *attrs[XFRMA_MAX+1]; |
05600a79 | 2417 | const struct xfrm_link *link; |
a7bd9a45 | 2418 | int type, err; |
1da177e4 | 2419 | |
1da177e4 | 2420 | type = nlh->nlmsg_type; |
1da177e4 | 2421 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2422 | return -EINVAL; |
1da177e4 LT |
2423 | |
2424 | type -= XFRM_MSG_BASE; | |
2425 | link = &xfrm_dispatch[type]; | |
2426 | ||
2427 | /* All operations require privileges, even GET */ | |
90f62cf3 | 2428 | if (!netlink_net_capable(skb, CAP_NET_ADMIN)) |
1d00a4eb | 2429 | return -EPERM; |
1da177e4 | 2430 | |
492b558b TG |
2431 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2432 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2433 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2434 | if (link->dump == NULL) |
1d00a4eb | 2435 | return -EINVAL; |
88fc2c84 | 2436 | |
80d326fa PNA |
2437 | { |
2438 | struct netlink_dump_control c = { | |
2439 | .dump = link->dump, | |
2440 | .done = link->done, | |
2441 | }; | |
2442 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2443 | } | |
1da177e4 LT |
2444 | } |
2445 | ||
880a6fab CG |
2446 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, |
2447 | link->nla_max ? : XFRMA_MAX, | |
2448 | link->nla_pol ? : xfrma_policy); | |
a7bd9a45 TG |
2449 | if (err < 0) |
2450 | return err; | |
1da177e4 LT |
2451 | |
2452 | if (link->doit == NULL) | |
1d00a4eb | 2453 | return -EINVAL; |
1da177e4 | 2454 | |
5424f32e | 2455 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2456 | } |
2457 | ||
cd40b7d3 | 2458 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2459 | { |
283bc9f3 FD |
2460 | struct net *net = sock_net(skb->sk); |
2461 | ||
2462 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); | |
cd40b7d3 | 2463 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); |
283bc9f3 | 2464 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
2465 | } |
2466 | ||
7deb2264 TG |
2467 | static inline size_t xfrm_expire_msgsize(void) |
2468 | { | |
6f26b61e JHS |
2469 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2470 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2471 | } |
2472 | ||
214e005b | 2473 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2474 | { |
2475 | struct xfrm_user_expire *ue; | |
2476 | struct nlmsghdr *nlh; | |
1d1e34dd | 2477 | int err; |
1da177e4 | 2478 | |
15e47304 | 2479 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
79b8b7f4 TG |
2480 | if (nlh == NULL) |
2481 | return -EMSGSIZE; | |
1da177e4 | 2482 | |
7b67c857 | 2483 | ue = nlmsg_data(nlh); |
1da177e4 | 2484 | copy_to_user_state(x, &ue->state); |
d51d081d | 2485 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2486 | |
1d1e34dd DM |
2487 | err = xfrm_mark_put(skb, &x->mark); |
2488 | if (err) | |
2489 | return err; | |
6f26b61e | 2490 | |
9825069d | 2491 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2492 | } |
2493 | ||
214e005b | 2494 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2495 | { |
fc34acd3 | 2496 | struct net *net = xs_net(x); |
1da177e4 LT |
2497 | struct sk_buff *skb; |
2498 | ||
7deb2264 | 2499 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2500 | if (skb == NULL) |
2501 | return -ENOMEM; | |
2502 | ||
6f26b61e JHS |
2503 | if (build_expire(skb, x, c) < 0) { |
2504 | kfree_skb(skb); | |
2505 | return -EMSGSIZE; | |
2506 | } | |
1da177e4 | 2507 | |
21ee543e | 2508 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2509 | } |
2510 | ||
214e005b | 2511 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2512 | { |
fc34acd3 | 2513 | struct net *net = xs_net(x); |
d51d081d | 2514 | struct sk_buff *skb; |
d51d081d | 2515 | |
d8647b79 | 2516 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2517 | if (skb == NULL) |
2518 | return -ENOMEM; | |
2519 | ||
2520 | if (build_aevent(skb, x, c) < 0) | |
2521 | BUG(); | |
2522 | ||
21ee543e | 2523 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); |
d51d081d JHS |
2524 | } |
2525 | ||
214e005b | 2526 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2527 | { |
7067802e | 2528 | struct net *net = c->net; |
26b15dad JHS |
2529 | struct xfrm_usersa_flush *p; |
2530 | struct nlmsghdr *nlh; | |
2531 | struct sk_buff *skb; | |
7deb2264 | 2532 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2533 | |
7deb2264 | 2534 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2535 | if (skb == NULL) |
2536 | return -ENOMEM; | |
26b15dad | 2537 | |
15e47304 | 2538 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
79b8b7f4 TG |
2539 | if (nlh == NULL) { |
2540 | kfree_skb(skb); | |
2541 | return -EMSGSIZE; | |
2542 | } | |
26b15dad | 2543 | |
7b67c857 | 2544 | p = nlmsg_data(nlh); |
bf08867f | 2545 | p->proto = c->data.proto; |
26b15dad | 2546 | |
9825069d | 2547 | nlmsg_end(skb, nlh); |
26b15dad | 2548 | |
21ee543e | 2549 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad JHS |
2550 | } |
2551 | ||
7deb2264 | 2552 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2553 | { |
7deb2264 | 2554 | size_t l = 0; |
1a6509d9 HX |
2555 | if (x->aead) |
2556 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2557 | if (x->aalg) { |
2558 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2559 | (x->aalg->alg_key_len + 7) / 8); | |
2560 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2561 | } | |
26b15dad | 2562 | if (x->ealg) |
0f99be0d | 2563 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2564 | if (x->calg) |
7deb2264 | 2565 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2566 | if (x->encap) |
7deb2264 | 2567 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2568 | if (x->tfcpad) |
2569 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2570 | if (x->replay_esn) |
2571 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
68325d3b HX |
2572 | if (x->security) |
2573 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2574 | x->security->ctx_len); | |
2575 | if (x->coaddr) | |
2576 | l += nla_total_size(sizeof(*x->coaddr)); | |
a947b0a9 ND |
2577 | if (x->props.extra_flags) |
2578 | l += nla_total_size(sizeof(x->props.extra_flags)); | |
68325d3b | 2579 | |
d26f3984 HX |
2580 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2581 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2582 | |
2583 | return l; | |
2584 | } | |
2585 | ||
214e005b | 2586 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2587 | { |
fc34acd3 | 2588 | struct net *net = xs_net(x); |
26b15dad | 2589 | struct xfrm_usersa_info *p; |
0603eac0 | 2590 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2591 | struct nlmsghdr *nlh; |
2592 | struct sk_buff *skb; | |
26b15dad | 2593 | int len = xfrm_sa_len(x); |
1d1e34dd | 2594 | int headlen, err; |
0603eac0 HX |
2595 | |
2596 | headlen = sizeof(*p); | |
2597 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2598 | len += nla_total_size(headlen); |
0603eac0 | 2599 | headlen = sizeof(*id); |
6f26b61e | 2600 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2601 | } |
7deb2264 | 2602 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2603 | |
7deb2264 | 2604 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2605 | if (skb == NULL) |
2606 | return -ENOMEM; | |
26b15dad | 2607 | |
15e47304 | 2608 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2609 | err = -EMSGSIZE; |
79b8b7f4 | 2610 | if (nlh == NULL) |
1d1e34dd | 2611 | goto out_free_skb; |
26b15dad | 2612 | |
7b67c857 | 2613 | p = nlmsg_data(nlh); |
0603eac0 | 2614 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2615 | struct nlattr *attr; |
2616 | ||
7b67c857 | 2617 | id = nlmsg_data(nlh); |
0603eac0 HX |
2618 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2619 | id->spi = x->id.spi; | |
2620 | id->family = x->props.family; | |
2621 | id->proto = x->id.proto; | |
2622 | ||
c0144bea | 2623 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2624 | err = -EMSGSIZE; |
c0144bea | 2625 | if (attr == NULL) |
1d1e34dd | 2626 | goto out_free_skb; |
c0144bea TG |
2627 | |
2628 | p = nla_data(attr); | |
0603eac0 | 2629 | } |
1d1e34dd DM |
2630 | err = copy_to_user_state_extra(x, p, skb); |
2631 | if (err) | |
2632 | goto out_free_skb; | |
26b15dad | 2633 | |
9825069d | 2634 | nlmsg_end(skb, nlh); |
26b15dad | 2635 | |
21ee543e | 2636 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad | 2637 | |
1d1e34dd | 2638 | out_free_skb: |
26b15dad | 2639 | kfree_skb(skb); |
1d1e34dd | 2640 | return err; |
26b15dad JHS |
2641 | } |
2642 | ||
214e005b | 2643 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2644 | { |
2645 | ||
2646 | switch (c->event) { | |
f60f6b8f | 2647 | case XFRM_MSG_EXPIRE: |
26b15dad | 2648 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2649 | case XFRM_MSG_NEWAE: |
2650 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2651 | case XFRM_MSG_DELSA: |
2652 | case XFRM_MSG_UPDSA: | |
2653 | case XFRM_MSG_NEWSA: | |
26b15dad | 2654 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2655 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2656 | return xfrm_notify_sa_flush(c); |
2657 | default: | |
62db5cfd | 2658 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2659 | c->event); | |
2660 | break; | |
26b15dad JHS |
2661 | } |
2662 | ||
2663 | return 0; | |
2664 | ||
2665 | } | |
2666 | ||
7deb2264 TG |
2667 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2668 | struct xfrm_policy *xp) | |
2669 | { | |
2670 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2671 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2672 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2673 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2674 | + userpolicy_type_attrsize(); | |
2675 | } | |
2676 | ||
1da177e4 | 2677 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
65e0736b | 2678 | struct xfrm_tmpl *xt, struct xfrm_policy *xp) |
1da177e4 | 2679 | { |
1d1e34dd | 2680 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2681 | struct xfrm_user_acquire *ua; |
2682 | struct nlmsghdr *nlh; | |
1d1e34dd | 2683 | int err; |
1da177e4 | 2684 | |
79b8b7f4 TG |
2685 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2686 | if (nlh == NULL) | |
2687 | return -EMSGSIZE; | |
1da177e4 | 2688 | |
7b67c857 | 2689 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2690 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2691 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2692 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
65e0736b | 2693 | copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); |
1da177e4 LT |
2694 | ua->aalgos = xt->aalgos; |
2695 | ua->ealgos = xt->ealgos; | |
2696 | ua->calgos = xt->calgos; | |
2697 | ua->seq = x->km.seq = seq; | |
2698 | ||
1d1e34dd DM |
2699 | err = copy_to_user_tmpl(xp, skb); |
2700 | if (!err) | |
2701 | err = copy_to_user_state_sec_ctx(x, skb); | |
2702 | if (!err) | |
2703 | err = copy_to_user_policy_type(xp->type, skb); | |
2704 | if (!err) | |
2705 | err = xfrm_mark_put(skb, &xp->mark); | |
2706 | if (err) { | |
2707 | nlmsg_cancel(skb, nlh); | |
2708 | return err; | |
2709 | } | |
1da177e4 | 2710 | |
9825069d | 2711 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2712 | } |
2713 | ||
2714 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
65e0736b | 2715 | struct xfrm_policy *xp) |
1da177e4 | 2716 | { |
a6483b79 | 2717 | struct net *net = xs_net(x); |
1da177e4 | 2718 | struct sk_buff *skb; |
1da177e4 | 2719 | |
7deb2264 | 2720 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2721 | if (skb == NULL) |
2722 | return -ENOMEM; | |
2723 | ||
65e0736b | 2724 | if (build_acquire(skb, x, xt, xp) < 0) |
1da177e4 LT |
2725 | BUG(); |
2726 | ||
21ee543e | 2727 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); |
1da177e4 LT |
2728 | } |
2729 | ||
2730 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2731 | * or more templates. | |
2732 | */ | |
cb969f07 | 2733 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2734 | u8 *data, int len, int *dir) |
2735 | { | |
fc34acd3 | 2736 | struct net *net = sock_net(sk); |
1da177e4 LT |
2737 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2738 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2739 | struct xfrm_policy *xp; | |
2740 | int nr; | |
2741 | ||
cb969f07 | 2742 | switch (sk->sk_family) { |
1da177e4 LT |
2743 | case AF_INET: |
2744 | if (opt != IP_XFRM_POLICY) { | |
2745 | *dir = -EOPNOTSUPP; | |
2746 | return NULL; | |
2747 | } | |
2748 | break; | |
dfd56b8b | 2749 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2750 | case AF_INET6: |
2751 | if (opt != IPV6_XFRM_POLICY) { | |
2752 | *dir = -EOPNOTSUPP; | |
2753 | return NULL; | |
2754 | } | |
2755 | break; | |
2756 | #endif | |
2757 | default: | |
2758 | *dir = -EINVAL; | |
2759 | return NULL; | |
2760 | } | |
2761 | ||
2762 | *dir = -EINVAL; | |
2763 | ||
2764 | if (len < sizeof(*p) || | |
2765 | verify_newpolicy_info(p)) | |
2766 | return NULL; | |
2767 | ||
2768 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2769 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2770 | return NULL; |
2771 | ||
a4f1bac6 HX |
2772 | if (p->dir > XFRM_POLICY_OUT) |
2773 | return NULL; | |
2774 | ||
2f09a4d5 | 2775 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2776 | if (xp == NULL) { |
2777 | *dir = -ENOBUFS; | |
2778 | return NULL; | |
2779 | } | |
2780 | ||
2781 | copy_from_user_policy(xp, p); | |
f7b6983f | 2782 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2783 | copy_templates(xp, ut, nr); |
2784 | ||
2785 | *dir = p->dir; | |
2786 | ||
2787 | return xp; | |
2788 | } | |
2789 | ||
7deb2264 TG |
2790 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2791 | { | |
2792 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2793 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2794 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2795 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2796 | + userpolicy_type_attrsize(); |
2797 | } | |
2798 | ||
1da177e4 | 2799 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2800 | int dir, const struct km_event *c) |
1da177e4 LT |
2801 | { |
2802 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2803 | int hard = c->data.hard; |
1d1e34dd DM |
2804 | struct nlmsghdr *nlh; |
2805 | int err; | |
1da177e4 | 2806 | |
15e47304 | 2807 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
79b8b7f4 TG |
2808 | if (nlh == NULL) |
2809 | return -EMSGSIZE; | |
1da177e4 | 2810 | |
7b67c857 | 2811 | upe = nlmsg_data(nlh); |
1da177e4 | 2812 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2813 | err = copy_to_user_tmpl(xp, skb); |
2814 | if (!err) | |
2815 | err = copy_to_user_sec_ctx(xp, skb); | |
2816 | if (!err) | |
2817 | err = copy_to_user_policy_type(xp->type, skb); | |
2818 | if (!err) | |
2819 | err = xfrm_mark_put(skb, &xp->mark); | |
2820 | if (err) { | |
2821 | nlmsg_cancel(skb, nlh); | |
2822 | return err; | |
2823 | } | |
1da177e4 LT |
2824 | upe->hard = !!hard; |
2825 | ||
9825069d | 2826 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2827 | } |
2828 | ||
214e005b | 2829 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2830 | { |
fc34acd3 | 2831 | struct net *net = xp_net(xp); |
1da177e4 | 2832 | struct sk_buff *skb; |
1da177e4 | 2833 | |
7deb2264 | 2834 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2835 | if (skb == NULL) |
2836 | return -ENOMEM; | |
2837 | ||
d51d081d | 2838 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2839 | BUG(); |
2840 | ||
21ee543e | 2841 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2842 | } |
2843 | ||
214e005b | 2844 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2845 | { |
1d1e34dd | 2846 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2847 | struct net *net = xp_net(xp); |
26b15dad | 2848 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2849 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2850 | struct nlmsghdr *nlh; |
2851 | struct sk_buff *skb; | |
1d1e34dd | 2852 | int headlen, err; |
0603eac0 HX |
2853 | |
2854 | headlen = sizeof(*p); | |
2855 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2856 | len += nla_total_size(headlen); |
0603eac0 HX |
2857 | headlen = sizeof(*id); |
2858 | } | |
cfbfd45a | 2859 | len += userpolicy_type_attrsize(); |
295fae56 | 2860 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2861 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2862 | |
7deb2264 | 2863 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2864 | if (skb == NULL) |
2865 | return -ENOMEM; | |
26b15dad | 2866 | |
15e47304 | 2867 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2868 | err = -EMSGSIZE; |
79b8b7f4 | 2869 | if (nlh == NULL) |
1d1e34dd | 2870 | goto out_free_skb; |
26b15dad | 2871 | |
7b67c857 | 2872 | p = nlmsg_data(nlh); |
0603eac0 | 2873 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2874 | struct nlattr *attr; |
2875 | ||
7b67c857 | 2876 | id = nlmsg_data(nlh); |
0603eac0 HX |
2877 | memset(id, 0, sizeof(*id)); |
2878 | id->dir = dir; | |
2879 | if (c->data.byid) | |
2880 | id->index = xp->index; | |
2881 | else | |
2882 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2883 | ||
c0144bea | 2884 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2885 | err = -EMSGSIZE; |
c0144bea | 2886 | if (attr == NULL) |
1d1e34dd | 2887 | goto out_free_skb; |
c0144bea TG |
2888 | |
2889 | p = nla_data(attr); | |
0603eac0 | 2890 | } |
26b15dad | 2891 | |
26b15dad | 2892 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2893 | err = copy_to_user_tmpl(xp, skb); |
2894 | if (!err) | |
2895 | err = copy_to_user_policy_type(xp->type, skb); | |
2896 | if (!err) | |
2897 | err = xfrm_mark_put(skb, &xp->mark); | |
2898 | if (err) | |
2899 | goto out_free_skb; | |
295fae56 | 2900 | |
9825069d | 2901 | nlmsg_end(skb, nlh); |
26b15dad | 2902 | |
21ee543e | 2903 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2904 | |
1d1e34dd | 2905 | out_free_skb: |
26b15dad | 2906 | kfree_skb(skb); |
1d1e34dd | 2907 | return err; |
26b15dad JHS |
2908 | } |
2909 | ||
214e005b | 2910 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2911 | { |
7067802e | 2912 | struct net *net = c->net; |
26b15dad JHS |
2913 | struct nlmsghdr *nlh; |
2914 | struct sk_buff *skb; | |
1d1e34dd | 2915 | int err; |
26b15dad | 2916 | |
7deb2264 | 2917 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2918 | if (skb == NULL) |
2919 | return -ENOMEM; | |
26b15dad | 2920 | |
15e47304 | 2921 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2922 | err = -EMSGSIZE; |
79b8b7f4 | 2923 | if (nlh == NULL) |
1d1e34dd DM |
2924 | goto out_free_skb; |
2925 | err = copy_to_user_policy_type(c->data.type, skb); | |
2926 | if (err) | |
2927 | goto out_free_skb; | |
26b15dad | 2928 | |
9825069d | 2929 | nlmsg_end(skb, nlh); |
26b15dad | 2930 | |
21ee543e | 2931 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2932 | |
1d1e34dd | 2933 | out_free_skb: |
26b15dad | 2934 | kfree_skb(skb); |
1d1e34dd | 2935 | return err; |
26b15dad JHS |
2936 | } |
2937 | ||
214e005b | 2938 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2939 | { |
2940 | ||
2941 | switch (c->event) { | |
f60f6b8f HX |
2942 | case XFRM_MSG_NEWPOLICY: |
2943 | case XFRM_MSG_UPDPOLICY: | |
2944 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2945 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2946 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2947 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2948 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2949 | return xfrm_exp_policy_notify(xp, dir, c); |
2950 | default: | |
62db5cfd | 2951 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2952 | c->event); | |
26b15dad JHS |
2953 | } |
2954 | ||
2955 | return 0; | |
2956 | ||
2957 | } | |
2958 | ||
7deb2264 TG |
2959 | static inline size_t xfrm_report_msgsize(void) |
2960 | { | |
2961 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2962 | } | |
2963 | ||
97a64b45 MN |
2964 | static int build_report(struct sk_buff *skb, u8 proto, |
2965 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2966 | { | |
2967 | struct xfrm_user_report *ur; | |
2968 | struct nlmsghdr *nlh; | |
97a64b45 | 2969 | |
79b8b7f4 TG |
2970 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2971 | if (nlh == NULL) | |
2972 | return -EMSGSIZE; | |
97a64b45 | 2973 | |
7b67c857 | 2974 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2975 | ur->proto = proto; |
2976 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2977 | ||
1d1e34dd DM |
2978 | if (addr) { |
2979 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2980 | if (err) { | |
2981 | nlmsg_cancel(skb, nlh); | |
2982 | return err; | |
2983 | } | |
2984 | } | |
9825069d | 2985 | return nlmsg_end(skb, nlh); |
97a64b45 MN |
2986 | } |
2987 | ||
db983c11 AD |
2988 | static int xfrm_send_report(struct net *net, u8 proto, |
2989 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2990 | { |
2991 | struct sk_buff *skb; | |
97a64b45 | 2992 | |
7deb2264 | 2993 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2994 | if (skb == NULL) |
2995 | return -ENOMEM; | |
2996 | ||
2997 | if (build_report(skb, proto, sel, addr) < 0) | |
2998 | BUG(); | |
2999 | ||
21ee543e | 3000 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); |
97a64b45 MN |
3001 | } |
3002 | ||
3a2dfbe8 MW |
3003 | static inline size_t xfrm_mapping_msgsize(void) |
3004 | { | |
3005 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
3006 | } | |
3007 | ||
3008 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
3009 | xfrm_address_t *new_saddr, __be16 new_sport) | |
3010 | { | |
3011 | struct xfrm_user_mapping *um; | |
3012 | struct nlmsghdr *nlh; | |
3013 | ||
3014 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
3015 | if (nlh == NULL) | |
3016 | return -EMSGSIZE; | |
3017 | ||
3018 | um = nlmsg_data(nlh); | |
3019 | ||
3020 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
3021 | um->id.spi = x->id.spi; | |
3022 | um->id.family = x->props.family; | |
3023 | um->id.proto = x->id.proto; | |
3024 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
3025 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
3026 | um->new_sport = new_sport; | |
3027 | um->old_sport = x->encap->encap_sport; | |
3028 | um->reqid = x->props.reqid; | |
3029 | ||
3030 | return nlmsg_end(skb, nlh); | |
3031 | } | |
3032 | ||
3033 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
3034 | __be16 sport) | |
3035 | { | |
a6483b79 | 3036 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
3037 | struct sk_buff *skb; |
3038 | ||
3039 | if (x->id.proto != IPPROTO_ESP) | |
3040 | return -EINVAL; | |
3041 | ||
3042 | if (!x->encap) | |
3043 | return -EINVAL; | |
3044 | ||
3045 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
3046 | if (skb == NULL) | |
3047 | return -ENOMEM; | |
3048 | ||
3049 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
3050 | BUG(); | |
3051 | ||
21ee543e | 3052 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); |
3a2dfbe8 MW |
3053 | } |
3054 | ||
0f24558e HG |
3055 | static bool xfrm_is_alive(const struct km_event *c) |
3056 | { | |
3057 | return (bool)xfrm_acquire_is_on(c->net); | |
3058 | } | |
3059 | ||
1da177e4 LT |
3060 | static struct xfrm_mgr netlink_mgr = { |
3061 | .id = "netlink", | |
3062 | .notify = xfrm_send_state_notify, | |
3063 | .acquire = xfrm_send_acquire, | |
3064 | .compile_policy = xfrm_compile_policy, | |
3065 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 3066 | .report = xfrm_send_report, |
5c79de6e | 3067 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 3068 | .new_mapping = xfrm_send_mapping, |
0f24558e | 3069 | .is_alive = xfrm_is_alive, |
1da177e4 LT |
3070 | }; |
3071 | ||
a6483b79 | 3072 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 3073 | { |
be33690d | 3074 | struct sock *nlsk; |
a31f2d17 PNA |
3075 | struct netlink_kernel_cfg cfg = { |
3076 | .groups = XFRMNLGRP_MAX, | |
3077 | .input = xfrm_netlink_rcv, | |
3078 | }; | |
be33690d | 3079 | |
9f00d977 | 3080 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); |
be33690d | 3081 | if (nlsk == NULL) |
1da177e4 | 3082 | return -ENOMEM; |
d79d792e | 3083 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 3084 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
3085 | return 0; |
3086 | } | |
3087 | ||
d79d792e | 3088 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 3089 | { |
d79d792e EB |
3090 | struct net *net; |
3091 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 3092 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
3093 | synchronize_net(); |
3094 | list_for_each_entry(net, net_exit_list, exit_list) | |
3095 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
3096 | } |
3097 | ||
a6483b79 | 3098 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
3099 | .init = xfrm_user_net_init, |
3100 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
3101 | }; |
3102 | ||
3103 | static int __init xfrm_user_init(void) | |
3104 | { | |
3105 | int rv; | |
3106 | ||
3107 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
3108 | ||
3109 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3110 | if (rv < 0) | |
3111 | return rv; | |
3112 | rv = xfrm_register_km(&netlink_mgr); | |
3113 | if (rv < 0) | |
3114 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3115 | return rv; | |
3116 | } | |
3117 | ||
3118 | static void __exit xfrm_user_exit(void) | |
3119 | { | |
3120 | xfrm_unregister_km(&netlink_mgr); | |
3121 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3122 | } | |
3123 | ||
1da177e4 LT |
3124 | module_init(xfrm_user_init); |
3125 | module_exit(xfrm_user_exit); | |
3126 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3127 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3128 |