]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* xfrm_user.c: User interface to configure xfrm engine. |
2 | * | |
3 | * Copyright (C) 2002 David S. Miller (davem@redhat.com) | |
4 | * | |
5 | * Changes: | |
6 | * Mitsuru KANDA @USAGI | |
7 | * Kazunori MIYAZAWA @USAGI | |
8 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
9 | * IPv6 support | |
df71837d | 10 | * |
1da177e4 LT |
11 | */ |
12 | ||
9409f38a | 13 | #include <linux/crypto.h> |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/net.h> | |
21 | #include <linux/skbuff.h> | |
1da177e4 LT |
22 | #include <linux/pfkeyv2.h> |
23 | #include <linux/ipsec.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/security.h> | |
26 | #include <net/sock.h> | |
27 | #include <net/xfrm.h> | |
88fc2c84 | 28 | #include <net/netlink.h> |
fa6dd8a2 | 29 | #include <net/ah.h> |
1da177e4 | 30 | #include <asm/uaccess.h> |
dfd56b8b | 31 | #if IS_ENABLED(CONFIG_IPV6) |
e23c7194 MN |
32 | #include <linux/in6.h> |
33 | #endif | |
1da177e4 | 34 | |
1a6509d9 HX |
35 | static inline int aead_len(struct xfrm_algo_aead *alg) |
36 | { | |
37 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
38 | } | |
39 | ||
5424f32e | 40 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 41 | { |
5424f32e | 42 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
43 | struct xfrm_algo *algp; |
44 | ||
45 | if (!rt) | |
46 | return 0; | |
47 | ||
5424f32e | 48 | algp = nla_data(rt); |
0f99be0d | 49 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
50 | return -EINVAL; |
51 | ||
1da177e4 LT |
52 | switch (type) { |
53 | case XFRMA_ALG_AUTH: | |
1da177e4 | 54 | case XFRMA_ALG_CRYPT: |
1da177e4 | 55 | case XFRMA_ALG_COMP: |
1da177e4 LT |
56 | break; |
57 | ||
58 | default: | |
59 | return -EINVAL; | |
3ff50b79 | 60 | } |
1da177e4 LT |
61 | |
62 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
63 | return 0; | |
64 | } | |
65 | ||
4447bb33 MW |
66 | static int verify_auth_trunc(struct nlattr **attrs) |
67 | { | |
68 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; | |
69 | struct xfrm_algo_auth *algp; | |
70 | ||
71 | if (!rt) | |
72 | return 0; | |
73 | ||
74 | algp = nla_data(rt); | |
75 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) | |
76 | return -EINVAL; | |
77 | ||
78 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
79 | return 0; | |
80 | } | |
81 | ||
1a6509d9 HX |
82 | static int verify_aead(struct nlattr **attrs) |
83 | { | |
84 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
85 | struct xfrm_algo_aead *algp; | |
86 | ||
87 | if (!rt) | |
88 | return 0; | |
89 | ||
90 | algp = nla_data(rt); | |
91 | if (nla_len(rt) < aead_len(algp)) | |
92 | return -EINVAL; | |
93 | ||
94 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
95 | return 0; | |
96 | } | |
97 | ||
5424f32e | 98 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
99 | xfrm_address_t **addrp) |
100 | { | |
5424f32e | 101 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 102 | |
cf5cb79f | 103 | if (rt && addrp) |
5424f32e | 104 | *addrp = nla_data(rt); |
eb2971b6 | 105 | } |
df71837d | 106 | |
5424f32e | 107 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 108 | { |
5424f32e | 109 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 110 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
111 | |
112 | if (!rt) | |
113 | return 0; | |
114 | ||
5424f32e | 115 | uctx = nla_data(rt); |
cf5cb79f | 116 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
117 | return -EINVAL; |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
d8647b79 SK |
122 | static inline int verify_replay(struct xfrm_usersa_info *p, |
123 | struct nlattr **attrs) | |
124 | { | |
125 | struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; | |
ecd79187 | 126 | struct xfrm_replay_state_esn *rs; |
d8647b79 | 127 | |
ecd79187 MK |
128 | if (p->flags & XFRM_STATE_ESN) { |
129 | if (!rt) | |
130 | return -EINVAL; | |
131 | ||
132 | rs = nla_data(rt); | |
133 | ||
134 | if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) | |
135 | return -EINVAL; | |
136 | ||
137 | if (nla_len(rt) < xfrm_replay_state_esn_len(rs) && | |
138 | nla_len(rt) != sizeof(*rs)) | |
139 | return -EINVAL; | |
140 | } | |
7833aa05 | 141 | |
d8647b79 SK |
142 | if (!rt) |
143 | return 0; | |
144 | ||
02aadf72 SK |
145 | if (p->id.proto != IPPROTO_ESP) |
146 | return -EINVAL; | |
147 | ||
d8647b79 SK |
148 | if (p->replay_window != 0) |
149 | return -EINVAL; | |
150 | ||
151 | return 0; | |
152 | } | |
df71837d | 153 | |
1da177e4 | 154 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 155 | struct nlattr **attrs) |
1da177e4 LT |
156 | { |
157 | int err; | |
158 | ||
159 | err = -EINVAL; | |
160 | switch (p->family) { | |
161 | case AF_INET: | |
162 | break; | |
163 | ||
164 | case AF_INET6: | |
dfd56b8b | 165 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
166 | break; |
167 | #else | |
168 | err = -EAFNOSUPPORT; | |
169 | goto out; | |
170 | #endif | |
171 | ||
172 | default: | |
173 | goto out; | |
3ff50b79 | 174 | } |
1da177e4 LT |
175 | |
176 | err = -EINVAL; | |
177 | switch (p->id.proto) { | |
178 | case IPPROTO_AH: | |
4447bb33 MW |
179 | if ((!attrs[XFRMA_ALG_AUTH] && |
180 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 181 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 182 | attrs[XFRMA_ALG_CRYPT] || |
35d2856b MW |
183 | attrs[XFRMA_ALG_COMP] || |
184 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
185 | goto out; |
186 | break; | |
187 | ||
188 | case IPPROTO_ESP: | |
1a6509d9 HX |
189 | if (attrs[XFRMA_ALG_COMP]) |
190 | goto out; | |
191 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 192 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
193 | !attrs[XFRMA_ALG_CRYPT] && |
194 | !attrs[XFRMA_ALG_AEAD]) | |
195 | goto out; | |
196 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 197 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
198 | attrs[XFRMA_ALG_CRYPT]) && |
199 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 | 200 | goto out; |
35d2856b MW |
201 | if (attrs[XFRMA_TFCPAD] && |
202 | p->mode != XFRM_MODE_TUNNEL) | |
203 | goto out; | |
1da177e4 LT |
204 | break; |
205 | ||
206 | case IPPROTO_COMP: | |
35a7aa08 | 207 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 208 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 209 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 210 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35d2856b MW |
211 | attrs[XFRMA_ALG_CRYPT] || |
212 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
213 | goto out; |
214 | break; | |
215 | ||
dfd56b8b | 216 | #if IS_ENABLED(CONFIG_IPV6) |
e23c7194 MN |
217 | case IPPROTO_DSTOPTS: |
218 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
219 | if (attrs[XFRMA_ALG_COMP] || |
220 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 221 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 222 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
223 | attrs[XFRMA_ALG_CRYPT] || |
224 | attrs[XFRMA_ENCAP] || | |
225 | attrs[XFRMA_SEC_CTX] || | |
35d2856b | 226 | attrs[XFRMA_TFCPAD] || |
35a7aa08 | 227 | !attrs[XFRMA_COADDR]) |
e23c7194 MN |
228 | goto out; |
229 | break; | |
230 | #endif | |
231 | ||
1da177e4 LT |
232 | default: |
233 | goto out; | |
3ff50b79 | 234 | } |
1da177e4 | 235 | |
1a6509d9 HX |
236 | if ((err = verify_aead(attrs))) |
237 | goto out; | |
4447bb33 MW |
238 | if ((err = verify_auth_trunc(attrs))) |
239 | goto out; | |
35a7aa08 | 240 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 241 | goto out; |
35a7aa08 | 242 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 243 | goto out; |
35a7aa08 | 244 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 245 | goto out; |
35a7aa08 | 246 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 247 | goto out; |
d8647b79 SK |
248 | if ((err = verify_replay(p, attrs))) |
249 | goto out; | |
1da177e4 LT |
250 | |
251 | err = -EINVAL; | |
252 | switch (p->mode) { | |
7e49e6de MN |
253 | case XFRM_MODE_TRANSPORT: |
254 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 255 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 256 | case XFRM_MODE_BEET: |
1da177e4 LT |
257 | break; |
258 | ||
259 | default: | |
260 | goto out; | |
3ff50b79 | 261 | } |
1da177e4 LT |
262 | |
263 | err = 0; | |
264 | ||
265 | out: | |
266 | return err; | |
267 | } | |
268 | ||
269 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
6f2f19ed | 270 | struct xfrm_algo_desc *(*get_byname)(const char *, int), |
5424f32e | 271 | struct nlattr *rta) |
1da177e4 | 272 | { |
1da177e4 LT |
273 | struct xfrm_algo *p, *ualg; |
274 | struct xfrm_algo_desc *algo; | |
275 | ||
276 | if (!rta) | |
277 | return 0; | |
278 | ||
5424f32e | 279 | ualg = nla_data(rta); |
1da177e4 LT |
280 | |
281 | algo = get_byname(ualg->alg_name, 1); | |
282 | if (!algo) | |
283 | return -ENOSYS; | |
284 | *props = algo->desc.sadb_alg_id; | |
285 | ||
0f99be0d | 286 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
287 | if (!p) |
288 | return -ENOMEM; | |
289 | ||
04ff1260 | 290 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
291 | *algpp = p; |
292 | return 0; | |
293 | } | |
294 | ||
4447bb33 MW |
295 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
296 | struct nlattr *rta) | |
297 | { | |
298 | struct xfrm_algo *ualg; | |
299 | struct xfrm_algo_auth *p; | |
300 | struct xfrm_algo_desc *algo; | |
301 | ||
302 | if (!rta) | |
303 | return 0; | |
304 | ||
305 | ualg = nla_data(rta); | |
306 | ||
307 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
308 | if (!algo) | |
309 | return -ENOSYS; | |
310 | *props = algo->desc.sadb_alg_id; | |
311 | ||
312 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
313 | if (!p) | |
314 | return -ENOMEM; | |
315 | ||
316 | strcpy(p->alg_name, algo->name); | |
317 | p->alg_key_len = ualg->alg_key_len; | |
318 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
319 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
320 | ||
321 | *algpp = p; | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
326 | struct nlattr *rta) | |
327 | { | |
328 | struct xfrm_algo_auth *p, *ualg; | |
329 | struct xfrm_algo_desc *algo; | |
330 | ||
331 | if (!rta) | |
332 | return 0; | |
333 | ||
334 | ualg = nla_data(rta); | |
335 | ||
336 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
337 | if (!algo) | |
338 | return -ENOSYS; | |
fa6dd8a2 ND |
339 | if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN || |
340 | ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) | |
4447bb33 MW |
341 | return -EINVAL; |
342 | *props = algo->desc.sadb_alg_id; | |
343 | ||
344 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
345 | if (!p) | |
346 | return -ENOMEM; | |
347 | ||
348 | strcpy(p->alg_name, algo->name); | |
349 | if (!p->alg_trunc_len) | |
350 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
351 | ||
352 | *algpp = p; | |
353 | return 0; | |
354 | } | |
355 | ||
1a6509d9 HX |
356 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
357 | struct nlattr *rta) | |
358 | { | |
359 | struct xfrm_algo_aead *p, *ualg; | |
360 | struct xfrm_algo_desc *algo; | |
361 | ||
362 | if (!rta) | |
363 | return 0; | |
364 | ||
365 | ualg = nla_data(rta); | |
366 | ||
367 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
368 | if (!algo) | |
369 | return -ENOSYS; | |
370 | *props = algo->desc.sadb_alg_id; | |
371 | ||
372 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
373 | if (!p) | |
374 | return -ENOMEM; | |
375 | ||
376 | strcpy(p->alg_name, algo->name); | |
377 | *algpp = p; | |
378 | return 0; | |
379 | } | |
380 | ||
e2b19125 SK |
381 | static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, |
382 | struct nlattr *rp) | |
383 | { | |
384 | struct xfrm_replay_state_esn *up; | |
ecd79187 | 385 | int ulen; |
e2b19125 SK |
386 | |
387 | if (!replay_esn || !rp) | |
388 | return 0; | |
389 | ||
390 | up = nla_data(rp); | |
ecd79187 | 391 | ulen = xfrm_replay_state_esn_len(up); |
e2b19125 | 392 | |
ecd79187 | 393 | if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen) |
e2b19125 SK |
394 | return -EINVAL; |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
d8647b79 SK |
399 | static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, |
400 | struct xfrm_replay_state_esn **preplay_esn, | |
401 | struct nlattr *rta) | |
402 | { | |
403 | struct xfrm_replay_state_esn *p, *pp, *up; | |
ecd79187 | 404 | int klen, ulen; |
d8647b79 SK |
405 | |
406 | if (!rta) | |
407 | return 0; | |
408 | ||
409 | up = nla_data(rta); | |
ecd79187 MK |
410 | klen = xfrm_replay_state_esn_len(up); |
411 | ulen = nla_len(rta) >= klen ? klen : sizeof(*up); | |
d8647b79 | 412 | |
ecd79187 | 413 | p = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
414 | if (!p) |
415 | return -ENOMEM; | |
416 | ||
ecd79187 | 417 | pp = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
418 | if (!pp) { |
419 | kfree(p); | |
420 | return -ENOMEM; | |
421 | } | |
422 | ||
ecd79187 MK |
423 | memcpy(p, up, ulen); |
424 | memcpy(pp, up, ulen); | |
425 | ||
d8647b79 SK |
426 | *replay_esn = p; |
427 | *preplay_esn = pp; | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
661697f7 | 432 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 433 | { |
df71837d TJ |
434 | int len = 0; |
435 | ||
436 | if (xfrm_ctx) { | |
437 | len += sizeof(struct xfrm_user_sec_ctx); | |
438 | len += xfrm_ctx->ctx_len; | |
439 | } | |
440 | return len; | |
441 | } | |
442 | ||
1da177e4 LT |
443 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
444 | { | |
445 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
446 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
447 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
448 | x->props.mode = p->mode; | |
449 | x->props.replay_window = p->replay_window; | |
450 | x->props.reqid = p->reqid; | |
451 | x->props.family = p->family; | |
54489c14 | 452 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 453 | x->props.flags = p->flags; |
196b0036 | 454 | |
ccf9b3b8 | 455 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 456 | x->sel.family = p->family; |
1da177e4 LT |
457 | } |
458 | ||
d51d081d JHS |
459 | /* |
460 | * someday when pfkey also has support, we could have the code | |
461 | * somehow made shareable and move it to xfrm_state.c - JHS | |
462 | * | |
463 | */ | |
e3ac104d MK |
464 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, |
465 | int update_esn) | |
d51d081d | 466 | { |
5424f32e | 467 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
e3ac104d | 468 | struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; |
5424f32e TG |
469 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
470 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
471 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 472 | |
d8647b79 SK |
473 | if (re) { |
474 | struct xfrm_replay_state_esn *replay_esn; | |
475 | replay_esn = nla_data(re); | |
476 | memcpy(x->replay_esn, replay_esn, | |
477 | xfrm_replay_state_esn_len(replay_esn)); | |
478 | memcpy(x->preplay_esn, replay_esn, | |
479 | xfrm_replay_state_esn_len(replay_esn)); | |
480 | } | |
481 | ||
d51d081d JHS |
482 | if (rp) { |
483 | struct xfrm_replay_state *replay; | |
5424f32e | 484 | replay = nla_data(rp); |
d51d081d JHS |
485 | memcpy(&x->replay, replay, sizeof(*replay)); |
486 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
487 | } | |
488 | ||
489 | if (lt) { | |
490 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 491 | ltime = nla_data(lt); |
d51d081d JHS |
492 | x->curlft.bytes = ltime->bytes; |
493 | x->curlft.packets = ltime->packets; | |
494 | x->curlft.add_time = ltime->add_time; | |
495 | x->curlft.use_time = ltime->use_time; | |
496 | } | |
497 | ||
cf5cb79f | 498 | if (et) |
5424f32e | 499 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 500 | |
cf5cb79f | 501 | if (rt) |
5424f32e | 502 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
503 | } |
504 | ||
fc34acd3 AD |
505 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
506 | struct xfrm_usersa_info *p, | |
5424f32e | 507 | struct nlattr **attrs, |
1da177e4 LT |
508 | int *errp) |
509 | { | |
fc34acd3 | 510 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
511 | int err = -ENOMEM; |
512 | ||
513 | if (!x) | |
514 | goto error_no_put; | |
515 | ||
516 | copy_from_user_state(x, p); | |
517 | ||
a947b0a9 ND |
518 | if (attrs[XFRMA_SA_EXTRA_FLAGS]) |
519 | x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); | |
520 | ||
1a6509d9 HX |
521 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
522 | attrs[XFRMA_ALG_AEAD]))) | |
523 | goto error; | |
4447bb33 MW |
524 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
525 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 526 | goto error; |
4447bb33 MW |
527 | if (!x->props.aalgo) { |
528 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
529 | attrs[XFRMA_ALG_AUTH]))) | |
530 | goto error; | |
531 | } | |
1da177e4 LT |
532 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
533 | xfrm_ealg_get_byname, | |
35a7aa08 | 534 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
535 | goto error; |
536 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
537 | xfrm_calg_get_byname, | |
35a7aa08 | 538 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 539 | goto error; |
fd21150a TG |
540 | |
541 | if (attrs[XFRMA_ENCAP]) { | |
542 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
543 | sizeof(*x->encap), GFP_KERNEL); | |
544 | if (x->encap == NULL) | |
545 | goto error; | |
546 | } | |
547 | ||
35d2856b MW |
548 | if (attrs[XFRMA_TFCPAD]) |
549 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); | |
550 | ||
fd21150a TG |
551 | if (attrs[XFRMA_COADDR]) { |
552 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
553 | sizeof(*x->coaddr), GFP_KERNEL); | |
554 | if (x->coaddr == NULL) | |
555 | goto error; | |
556 | } | |
557 | ||
6f26b61e JHS |
558 | xfrm_mark_get(attrs, &x->mark); |
559 | ||
a454f0cc | 560 | err = __xfrm_init_state(x, false); |
1da177e4 LT |
561 | if (err) |
562 | goto error; | |
563 | ||
fd21150a TG |
564 | if (attrs[XFRMA_SEC_CTX] && |
565 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
566 | goto error; |
567 | ||
d8647b79 SK |
568 | if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, |
569 | attrs[XFRMA_REPLAY_ESN_VAL]))) | |
570 | goto error; | |
571 | ||
1da177e4 | 572 | x->km.seq = p->seq; |
b27aeadb | 573 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 574 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 575 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d | 576 | |
9fdc4883 SK |
577 | if ((err = xfrm_init_replay(x))) |
578 | goto error; | |
d51d081d | 579 | |
9fdc4883 | 580 | /* override default values from above */ |
e3ac104d | 581 | xfrm_update_ae_params(x, attrs, 0); |
1da177e4 LT |
582 | |
583 | return x; | |
584 | ||
585 | error: | |
586 | x->km.state = XFRM_STATE_DEAD; | |
587 | xfrm_state_put(x); | |
588 | error_no_put: | |
589 | *errp = err; | |
590 | return NULL; | |
591 | } | |
592 | ||
22e70050 | 593 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 594 | struct nlattr **attrs) |
1da177e4 | 595 | { |
fc34acd3 | 596 | struct net *net = sock_net(skb->sk); |
7b67c857 | 597 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
598 | struct xfrm_state *x; |
599 | int err; | |
26b15dad | 600 | struct km_event c; |
e1760bd5 | 601 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
602 | u32 sessionid = audit_get_sessionid(current); |
603 | u32 sid; | |
1da177e4 | 604 | |
35a7aa08 | 605 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
606 | if (err) |
607 | return err; | |
608 | ||
fc34acd3 | 609 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
610 | if (!x) |
611 | return err; | |
612 | ||
26b15dad | 613 | xfrm_state_hold(x); |
1da177e4 LT |
614 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
615 | err = xfrm_state_add(x); | |
616 | else | |
617 | err = xfrm_state_update(x); | |
618 | ||
c53fa1ed | 619 | security_task_getsecid(current, &sid); |
2532386f | 620 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 621 | |
1da177e4 LT |
622 | if (err < 0) { |
623 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 624 | __xfrm_state_put(x); |
7d6dfe1f | 625 | goto out; |
1da177e4 LT |
626 | } |
627 | ||
26b15dad | 628 | c.seq = nlh->nlmsg_seq; |
15e47304 | 629 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 630 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
631 | |
632 | km_state_notify(x, &c); | |
7d6dfe1f | 633 | out: |
26b15dad | 634 | xfrm_state_put(x); |
1da177e4 LT |
635 | return err; |
636 | } | |
637 | ||
fc34acd3 AD |
638 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
639 | struct xfrm_usersa_id *p, | |
5424f32e | 640 | struct nlattr **attrs, |
eb2971b6 MN |
641 | int *errp) |
642 | { | |
643 | struct xfrm_state *x = NULL; | |
6f26b61e | 644 | struct xfrm_mark m; |
eb2971b6 | 645 | int err; |
6f26b61e | 646 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
647 | |
648 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
649 | err = -ESRCH; | |
6f26b61e | 650 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
651 | } else { |
652 | xfrm_address_t *saddr = NULL; | |
653 | ||
35a7aa08 | 654 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
655 | if (!saddr) { |
656 | err = -EINVAL; | |
657 | goto out; | |
658 | } | |
659 | ||
9abbffee | 660 | err = -ESRCH; |
6f26b61e JHS |
661 | x = xfrm_state_lookup_byaddr(net, mark, |
662 | &p->daddr, saddr, | |
221df1ed | 663 | p->proto, p->family); |
eb2971b6 MN |
664 | } |
665 | ||
666 | out: | |
667 | if (!x && errp) | |
668 | *errp = err; | |
669 | return x; | |
670 | } | |
671 | ||
22e70050 | 672 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 673 | struct nlattr **attrs) |
1da177e4 | 674 | { |
fc34acd3 | 675 | struct net *net = sock_net(skb->sk); |
1da177e4 | 676 | struct xfrm_state *x; |
eb2971b6 | 677 | int err = -ESRCH; |
26b15dad | 678 | struct km_event c; |
7b67c857 | 679 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
e1760bd5 | 680 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
681 | u32 sessionid = audit_get_sessionid(current); |
682 | u32 sid; | |
1da177e4 | 683 | |
fc34acd3 | 684 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 685 | if (x == NULL) |
eb2971b6 | 686 | return err; |
1da177e4 | 687 | |
6f68dc37 | 688 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
689 | goto out; |
690 | ||
1da177e4 | 691 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
692 | err = -EPERM; |
693 | goto out; | |
1da177e4 LT |
694 | } |
695 | ||
26b15dad | 696 | err = xfrm_state_delete(x); |
161a09e7 | 697 | |
c8c05a8e CZ |
698 | if (err < 0) |
699 | goto out; | |
26b15dad JHS |
700 | |
701 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 702 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 703 | c.event = nlh->nlmsg_type; |
26b15dad | 704 | km_state_notify(x, &c); |
1da177e4 | 705 | |
c8c05a8e | 706 | out: |
c53fa1ed | 707 | security_task_getsecid(current, &sid); |
2532386f | 708 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 709 | xfrm_state_put(x); |
26b15dad | 710 | return err; |
1da177e4 LT |
711 | } |
712 | ||
713 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
714 | { | |
f778a636 | 715 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
716 | memcpy(&p->id, &x->id, sizeof(p->id)); |
717 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
718 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
719 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
720 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 721 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
722 | p->mode = x->props.mode; |
723 | p->replay_window = x->props.replay_window; | |
724 | p->reqid = x->props.reqid; | |
725 | p->family = x->props.family; | |
726 | p->flags = x->props.flags; | |
727 | p->seq = x->km.seq; | |
728 | } | |
729 | ||
730 | struct xfrm_dump_info { | |
731 | struct sk_buff *in_skb; | |
732 | struct sk_buff *out_skb; | |
733 | u32 nlmsg_seq; | |
734 | u16 nlmsg_flags; | |
1da177e4 LT |
735 | }; |
736 | ||
c0144bea TG |
737 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
738 | { | |
c0144bea TG |
739 | struct xfrm_user_sec_ctx *uctx; |
740 | struct nlattr *attr; | |
68325d3b | 741 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
742 | |
743 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
744 | if (attr == NULL) | |
745 | return -EMSGSIZE; | |
746 | ||
747 | uctx = nla_data(attr); | |
748 | uctx->exttype = XFRMA_SEC_CTX; | |
749 | uctx->len = ctx_size; | |
750 | uctx->ctx_doi = s->ctx_doi; | |
751 | uctx->ctx_alg = s->ctx_alg; | |
752 | uctx->ctx_len = s->ctx_len; | |
753 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
4447bb33 MW |
758 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
759 | { | |
760 | struct xfrm_algo *algo; | |
761 | struct nlattr *nla; | |
762 | ||
763 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
764 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
765 | if (!nla) | |
766 | return -EMSGSIZE; | |
767 | ||
768 | algo = nla_data(nla); | |
4c87308b | 769 | strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); |
4447bb33 MW |
770 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
771 | algo->alg_key_len = auth->alg_key_len; | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
68325d3b HX |
776 | /* Don't change this without updating xfrm_sa_len! */ |
777 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
778 | struct xfrm_usersa_info *p, | |
779 | struct sk_buff *skb) | |
1da177e4 | 780 | { |
1d1e34dd | 781 | int ret = 0; |
d0fde795 | 782 | |
1d1e34dd | 783 | copy_to_user_state(x, p); |
68325d3b | 784 | |
a947b0a9 ND |
785 | if (x->props.extra_flags) { |
786 | ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, | |
787 | x->props.extra_flags); | |
788 | if (ret) | |
789 | goto out; | |
790 | } | |
791 | ||
1d1e34dd DM |
792 | if (x->coaddr) { |
793 | ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
794 | if (ret) | |
795 | goto out; | |
796 | } | |
797 | if (x->lastused) { | |
798 | ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused); | |
799 | if (ret) | |
800 | goto out; | |
801 | } | |
802 | if (x->aead) { | |
803 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
804 | if (ret) | |
805 | goto out; | |
806 | } | |
807 | if (x->aalg) { | |
808 | ret = copy_to_user_auth(x->aalg, skb); | |
809 | if (!ret) | |
810 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
811 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
812 | if (ret) | |
813 | goto out; | |
814 | } | |
815 | if (x->ealg) { | |
816 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); | |
817 | if (ret) | |
818 | goto out; | |
819 | } | |
820 | if (x->calg) { | |
821 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
822 | if (ret) | |
823 | goto out; | |
824 | } | |
825 | if (x->encap) { | |
826 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
827 | if (ret) | |
828 | goto out; | |
829 | } | |
830 | if (x->tfcpad) { | |
831 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); | |
832 | if (ret) | |
833 | goto out; | |
834 | } | |
835 | ret = xfrm_mark_put(skb, &x->mark); | |
836 | if (ret) | |
837 | goto out; | |
838 | if (x->replay_esn) { | |
839 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, | |
840 | xfrm_replay_state_esn_len(x->replay_esn), | |
841 | x->replay_esn); | |
842 | if (ret) | |
843 | goto out; | |
844 | } | |
845 | if (x->security) | |
846 | ret = copy_sec_ctx(x->security, skb); | |
847 | out: | |
848 | return ret; | |
68325d3b HX |
849 | } |
850 | ||
851 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
852 | { | |
853 | struct xfrm_dump_info *sp = ptr; | |
854 | struct sk_buff *in_skb = sp->in_skb; | |
855 | struct sk_buff *skb = sp->out_skb; | |
856 | struct xfrm_usersa_info *p; | |
857 | struct nlmsghdr *nlh; | |
858 | int err; | |
859 | ||
15e47304 | 860 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
68325d3b HX |
861 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
862 | if (nlh == NULL) | |
863 | return -EMSGSIZE; | |
864 | ||
865 | p = nlmsg_data(nlh); | |
866 | ||
867 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
868 | if (err) { |
869 | nlmsg_cancel(skb, nlh); | |
870 | return err; | |
871 | } | |
9825069d | 872 | nlmsg_end(skb, nlh); |
1da177e4 | 873 | return 0; |
1da177e4 LT |
874 | } |
875 | ||
4c563f76 TT |
876 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
877 | { | |
878 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
879 | xfrm_state_walk_done(walk); | |
880 | return 0; | |
881 | } | |
882 | ||
1da177e4 LT |
883 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
884 | { | |
fc34acd3 | 885 | struct net *net = sock_net(skb->sk); |
4c563f76 | 886 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
887 | struct xfrm_dump_info info; |
888 | ||
4c563f76 TT |
889 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
890 | sizeof(cb->args) - sizeof(cb->args[0])); | |
891 | ||
1da177e4 LT |
892 | info.in_skb = cb->skb; |
893 | info.out_skb = skb; | |
894 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
895 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
896 | |
897 | if (!cb->args[0]) { | |
898 | cb->args[0] = 1; | |
899 | xfrm_state_walk_init(walk, 0); | |
900 | } | |
901 | ||
fc34acd3 | 902 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
903 | |
904 | return skb->len; | |
905 | } | |
906 | ||
907 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
908 | struct xfrm_state *x, u32 seq) | |
909 | { | |
910 | struct xfrm_dump_info info; | |
911 | struct sk_buff *skb; | |
864745d2 | 912 | int err; |
1da177e4 | 913 | |
7deb2264 | 914 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
915 | if (!skb) |
916 | return ERR_PTR(-ENOMEM); | |
917 | ||
1da177e4 LT |
918 | info.in_skb = in_skb; |
919 | info.out_skb = skb; | |
920 | info.nlmsg_seq = seq; | |
921 | info.nlmsg_flags = 0; | |
1da177e4 | 922 | |
864745d2 MK |
923 | err = dump_one_state(x, 0, &info); |
924 | if (err) { | |
1da177e4 | 925 | kfree_skb(skb); |
864745d2 | 926 | return ERR_PTR(err); |
1da177e4 LT |
927 | } |
928 | ||
929 | return skb; | |
930 | } | |
931 | ||
7deb2264 TG |
932 | static inline size_t xfrm_spdinfo_msgsize(void) |
933 | { | |
934 | return NLMSG_ALIGN(4) | |
935 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
936 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
937 | } | |
938 | ||
e071041b | 939 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 940 | u32 portid, u32 seq, u32 flags) |
ecfd6b18 | 941 | { |
5a6d3416 JHS |
942 | struct xfrmk_spdinfo si; |
943 | struct xfrmu_spdinfo spc; | |
944 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 | 945 | struct nlmsghdr *nlh; |
1d1e34dd | 946 | int err; |
ecfd6b18 JHS |
947 | u32 *f; |
948 | ||
15e47304 | 949 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
25985edc | 950 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
951 | return -EMSGSIZE; |
952 | ||
953 | f = nlmsg_data(nlh); | |
954 | *f = flags; | |
e071041b | 955 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
956 | spc.incnt = si.incnt; |
957 | spc.outcnt = si.outcnt; | |
958 | spc.fwdcnt = si.fwdcnt; | |
959 | spc.inscnt = si.inscnt; | |
960 | spc.outscnt = si.outscnt; | |
961 | spc.fwdscnt = si.fwdscnt; | |
962 | sph.spdhcnt = si.spdhcnt; | |
963 | sph.spdhmcnt = si.spdhmcnt; | |
964 | ||
1d1e34dd DM |
965 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
966 | if (!err) | |
967 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
968 | if (err) { | |
969 | nlmsg_cancel(skb, nlh); | |
970 | return err; | |
971 | } | |
ecfd6b18 JHS |
972 | |
973 | return nlmsg_end(skb, nlh); | |
ecfd6b18 JHS |
974 | } |
975 | ||
976 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 977 | struct nlattr **attrs) |
ecfd6b18 | 978 | { |
a6483b79 | 979 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 980 | struct sk_buff *r_skb; |
7b67c857 | 981 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 982 | u32 sportid = NETLINK_CB(skb).portid; |
ecfd6b18 | 983 | u32 seq = nlh->nlmsg_seq; |
ecfd6b18 | 984 | |
7deb2264 | 985 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
986 | if (r_skb == NULL) |
987 | return -ENOMEM; | |
988 | ||
15e47304 | 989 | if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) |
ecfd6b18 JHS |
990 | BUG(); |
991 | ||
15e47304 | 992 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
ecfd6b18 JHS |
993 | } |
994 | ||
7deb2264 TG |
995 | static inline size_t xfrm_sadinfo_msgsize(void) |
996 | { | |
997 | return NLMSG_ALIGN(4) | |
998 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
999 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
1000 | } | |
1001 | ||
e071041b | 1002 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 1003 | u32 portid, u32 seq, u32 flags) |
28d8909b | 1004 | { |
af11e316 JHS |
1005 | struct xfrmk_sadinfo si; |
1006 | struct xfrmu_sadhinfo sh; | |
28d8909b | 1007 | struct nlmsghdr *nlh; |
1d1e34dd | 1008 | int err; |
28d8909b JHS |
1009 | u32 *f; |
1010 | ||
15e47304 | 1011 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
25985edc | 1012 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
1013 | return -EMSGSIZE; |
1014 | ||
1015 | f = nlmsg_data(nlh); | |
1016 | *f = flags; | |
e071041b | 1017 | xfrm_sad_getinfo(net, &si); |
28d8909b | 1018 | |
af11e316 JHS |
1019 | sh.sadhmcnt = si.sadhmcnt; |
1020 | sh.sadhcnt = si.sadhcnt; | |
1021 | ||
1d1e34dd DM |
1022 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
1023 | if (!err) | |
1024 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
1025 | if (err) { | |
1026 | nlmsg_cancel(skb, nlh); | |
1027 | return err; | |
1028 | } | |
28d8909b JHS |
1029 | |
1030 | return nlmsg_end(skb, nlh); | |
28d8909b JHS |
1031 | } |
1032 | ||
1033 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1034 | struct nlattr **attrs) |
28d8909b | 1035 | { |
a6483b79 | 1036 | struct net *net = sock_net(skb->sk); |
28d8909b | 1037 | struct sk_buff *r_skb; |
7b67c857 | 1038 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1039 | u32 sportid = NETLINK_CB(skb).portid; |
28d8909b | 1040 | u32 seq = nlh->nlmsg_seq; |
28d8909b | 1041 | |
7deb2264 | 1042 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1043 | if (r_skb == NULL) |
1044 | return -ENOMEM; | |
1045 | ||
15e47304 | 1046 | if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) |
28d8909b JHS |
1047 | BUG(); |
1048 | ||
15e47304 | 1049 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
28d8909b JHS |
1050 | } |
1051 | ||
22e70050 | 1052 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1053 | struct nlattr **attrs) |
1da177e4 | 1054 | { |
fc34acd3 | 1055 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1056 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1057 | struct xfrm_state *x; |
1058 | struct sk_buff *resp_skb; | |
eb2971b6 | 1059 | int err = -ESRCH; |
1da177e4 | 1060 | |
fc34acd3 | 1061 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1062 | if (x == NULL) |
1063 | goto out_noput; | |
1064 | ||
1065 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1066 | if (IS_ERR(resp_skb)) { | |
1067 | err = PTR_ERR(resp_skb); | |
1068 | } else { | |
15e47304 | 1069 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1070 | } |
1071 | xfrm_state_put(x); | |
1072 | out_noput: | |
1073 | return err; | |
1074 | } | |
1075 | ||
1076 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
1077 | { | |
1078 | switch (p->info.id.proto) { | |
1079 | case IPPROTO_AH: | |
1080 | case IPPROTO_ESP: | |
1081 | break; | |
1082 | ||
1083 | case IPPROTO_COMP: | |
1084 | /* IPCOMP spi is 16-bits. */ | |
1085 | if (p->max >= 0x10000) | |
1086 | return -EINVAL; | |
1087 | break; | |
1088 | ||
1089 | default: | |
1090 | return -EINVAL; | |
3ff50b79 | 1091 | } |
1da177e4 LT |
1092 | |
1093 | if (p->min > p->max) | |
1094 | return -EINVAL; | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
22e70050 | 1099 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1100 | struct nlattr **attrs) |
1da177e4 | 1101 | { |
fc34acd3 | 1102 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1103 | struct xfrm_state *x; |
1104 | struct xfrm_userspi_info *p; | |
1105 | struct sk_buff *resp_skb; | |
1106 | xfrm_address_t *daddr; | |
1107 | int family; | |
1108 | int err; | |
6f26b61e JHS |
1109 | u32 mark; |
1110 | struct xfrm_mark m; | |
1da177e4 | 1111 | |
7b67c857 | 1112 | p = nlmsg_data(nlh); |
1da177e4 LT |
1113 | err = verify_userspi_info(p); |
1114 | if (err) | |
1115 | goto out_noput; | |
1116 | ||
1117 | family = p->info.family; | |
1118 | daddr = &p->info.id.daddr; | |
1119 | ||
1120 | x = NULL; | |
6f26b61e JHS |
1121 | |
1122 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1123 | if (p->info.seq) { |
6f26b61e | 1124 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
70e94e66 | 1125 | if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { |
1da177e4 LT |
1126 | xfrm_state_put(x); |
1127 | x = NULL; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | if (!x) | |
6f26b61e | 1132 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1133 | p->info.id.proto, daddr, |
1134 | &p->info.saddr, 1, | |
1135 | family); | |
1136 | err = -ENOENT; | |
1137 | if (x == NULL) | |
1138 | goto out_noput; | |
1139 | ||
658b219e HX |
1140 | err = xfrm_alloc_spi(x, p->min, p->max); |
1141 | if (err) | |
1142 | goto out; | |
1da177e4 | 1143 | |
658b219e | 1144 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1145 | if (IS_ERR(resp_skb)) { |
1146 | err = PTR_ERR(resp_skb); | |
1147 | goto out; | |
1148 | } | |
1149 | ||
15e47304 | 1150 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1151 | |
1152 | out: | |
1153 | xfrm_state_put(x); | |
1154 | out_noput: | |
1155 | return err; | |
1156 | } | |
1157 | ||
b798a9ed | 1158 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1159 | { |
1160 | switch (dir) { | |
1161 | case XFRM_POLICY_IN: | |
1162 | case XFRM_POLICY_OUT: | |
1163 | case XFRM_POLICY_FWD: | |
1164 | break; | |
1165 | ||
1166 | default: | |
1167 | return -EINVAL; | |
3ff50b79 | 1168 | } |
1da177e4 LT |
1169 | |
1170 | return 0; | |
1171 | } | |
1172 | ||
b798a9ed | 1173 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1174 | { |
1175 | switch (type) { | |
1176 | case XFRM_POLICY_TYPE_MAIN: | |
1177 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1178 | case XFRM_POLICY_TYPE_SUB: | |
1179 | #endif | |
1180 | break; | |
1181 | ||
1182 | default: | |
1183 | return -EINVAL; | |
3ff50b79 | 1184 | } |
f7b6983f MN |
1185 | |
1186 | return 0; | |
1187 | } | |
1188 | ||
1da177e4 LT |
1189 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1190 | { | |
1191 | switch (p->share) { | |
1192 | case XFRM_SHARE_ANY: | |
1193 | case XFRM_SHARE_SESSION: | |
1194 | case XFRM_SHARE_USER: | |
1195 | case XFRM_SHARE_UNIQUE: | |
1196 | break; | |
1197 | ||
1198 | default: | |
1199 | return -EINVAL; | |
3ff50b79 | 1200 | } |
1da177e4 LT |
1201 | |
1202 | switch (p->action) { | |
1203 | case XFRM_POLICY_ALLOW: | |
1204 | case XFRM_POLICY_BLOCK: | |
1205 | break; | |
1206 | ||
1207 | default: | |
1208 | return -EINVAL; | |
3ff50b79 | 1209 | } |
1da177e4 LT |
1210 | |
1211 | switch (p->sel.family) { | |
1212 | case AF_INET: | |
1213 | break; | |
1214 | ||
1215 | case AF_INET6: | |
dfd56b8b | 1216 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1217 | break; |
1218 | #else | |
1219 | return -EAFNOSUPPORT; | |
1220 | #endif | |
1221 | ||
1222 | default: | |
1223 | return -EINVAL; | |
3ff50b79 | 1224 | } |
1da177e4 LT |
1225 | |
1226 | return verify_policy_dir(p->dir); | |
1227 | } | |
1228 | ||
5424f32e | 1229 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1230 | { |
5424f32e | 1231 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1232 | struct xfrm_user_sec_ctx *uctx; |
1233 | ||
1234 | if (!rt) | |
1235 | return 0; | |
1236 | ||
5424f32e | 1237 | uctx = nla_data(rt); |
03e1ad7b | 1238 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1239 | } |
1240 | ||
1da177e4 LT |
1241 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1242 | int nr) | |
1243 | { | |
1244 | int i; | |
1245 | ||
1246 | xp->xfrm_nr = nr; | |
1247 | for (i = 0; i < nr; i++, ut++) { | |
1248 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1249 | ||
1250 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1251 | memcpy(&t->saddr, &ut->saddr, | |
1252 | sizeof(xfrm_address_t)); | |
1253 | t->reqid = ut->reqid; | |
1254 | t->mode = ut->mode; | |
1255 | t->share = ut->share; | |
1256 | t->optional = ut->optional; | |
1257 | t->aalgos = ut->aalgos; | |
1258 | t->ealgos = ut->ealgos; | |
1259 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1260 | /* If all masks are ~0, then we allow all algorithms. */ |
1261 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1262 | t->encap_family = ut->family; |
1da177e4 LT |
1263 | } |
1264 | } | |
1265 | ||
b4ad86bf DM |
1266 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1267 | { | |
1268 | int i; | |
1269 | ||
1270 | if (nr > XFRM_MAX_DEPTH) | |
1271 | return -EINVAL; | |
1272 | ||
1273 | for (i = 0; i < nr; i++) { | |
1274 | /* We never validated the ut->family value, so many | |
1275 | * applications simply leave it at zero. The check was | |
1276 | * never made and ut->family was ignored because all | |
1277 | * templates could be assumed to have the same family as | |
1278 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1279 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1280 | */ | |
1281 | if (!ut[i].family) | |
1282 | ut[i].family = family; | |
1283 | ||
1284 | switch (ut[i].family) { | |
1285 | case AF_INET: | |
1286 | break; | |
dfd56b8b | 1287 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1288 | case AF_INET6: |
1289 | break; | |
1290 | #endif | |
1291 | default: | |
1292 | return -EINVAL; | |
3ff50b79 | 1293 | } |
b4ad86bf DM |
1294 | } |
1295 | ||
1296 | return 0; | |
1297 | } | |
1298 | ||
5424f32e | 1299 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1300 | { |
5424f32e | 1301 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1302 | |
1303 | if (!rt) { | |
1304 | pol->xfrm_nr = 0; | |
1305 | } else { | |
5424f32e TG |
1306 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1307 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1308 | int err; |
1da177e4 | 1309 | |
b4ad86bf DM |
1310 | err = validate_tmpl(nr, utmpl, pol->family); |
1311 | if (err) | |
1312 | return err; | |
1da177e4 | 1313 | |
5424f32e | 1314 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1315 | } |
1316 | return 0; | |
1317 | } | |
1318 | ||
5424f32e | 1319 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1320 | { |
5424f32e | 1321 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1322 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1323 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1324 | int err; |
1325 | ||
1326 | if (rt) { | |
5424f32e | 1327 | upt = nla_data(rt); |
f7b6983f MN |
1328 | type = upt->type; |
1329 | } | |
1330 | ||
1331 | err = verify_policy_type(type); | |
1332 | if (err) | |
1333 | return err; | |
1334 | ||
1335 | *tp = type; | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1da177e4 LT |
1339 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1340 | { | |
1341 | xp->priority = p->priority; | |
1342 | xp->index = p->index; | |
1343 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1344 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1345 | xp->action = p->action; | |
1346 | xp->flags = p->flags; | |
1347 | xp->family = p->sel.family; | |
1348 | /* XXX xp->share = p->share; */ | |
1349 | } | |
1350 | ||
1351 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1352 | { | |
7b789836 | 1353 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
1354 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
1355 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1356 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1357 | p->priority = xp->priority; | |
1358 | p->index = xp->index; | |
1359 | p->sel.family = xp->family; | |
1360 | p->dir = dir; | |
1361 | p->action = xp->action; | |
1362 | p->flags = xp->flags; | |
1363 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1364 | } | |
1365 | ||
fc34acd3 | 1366 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1367 | { |
fc34acd3 | 1368 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1369 | int err; |
1370 | ||
1371 | if (!xp) { | |
1372 | *errp = -ENOMEM; | |
1373 | return NULL; | |
1374 | } | |
1375 | ||
1376 | copy_from_user_policy(xp, p); | |
df71837d | 1377 | |
35a7aa08 | 1378 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1379 | if (err) |
1380 | goto error; | |
1381 | ||
35a7aa08 TG |
1382 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1383 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1384 | if (err) |
1385 | goto error; | |
1da177e4 | 1386 | |
295fae56 JHS |
1387 | xfrm_mark_get(attrs, &xp->mark); |
1388 | ||
1da177e4 | 1389 | return xp; |
f7b6983f MN |
1390 | error: |
1391 | *errp = err; | |
12a169e7 | 1392 | xp->walk.dead = 1; |
64c31b3f | 1393 | xfrm_policy_destroy(xp); |
f7b6983f | 1394 | return NULL; |
1da177e4 LT |
1395 | } |
1396 | ||
22e70050 | 1397 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1398 | struct nlattr **attrs) |
1da177e4 | 1399 | { |
fc34acd3 | 1400 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1401 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1402 | struct xfrm_policy *xp; |
26b15dad | 1403 | struct km_event c; |
1da177e4 LT |
1404 | int err; |
1405 | int excl; | |
e1760bd5 | 1406 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
1407 | u32 sessionid = audit_get_sessionid(current); |
1408 | u32 sid; | |
1da177e4 LT |
1409 | |
1410 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1411 | if (err) |
1412 | return err; | |
35a7aa08 | 1413 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1414 | if (err) |
1415 | return err; | |
1416 | ||
fc34acd3 | 1417 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1418 | if (!xp) |
1419 | return err; | |
1420 | ||
25985edc | 1421 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1422 | * Aha! this is anti-netlink really i.e more pfkey derived |
1423 | * in netlink excl is a flag and you wouldnt need | |
1424 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1425 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1426 | err = xfrm_policy_insert(p->dir, xp, excl); | |
c53fa1ed | 1427 | security_task_getsecid(current, &sid); |
2532386f | 1428 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1429 | |
1da177e4 | 1430 | if (err) { |
03e1ad7b | 1431 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1432 | kfree(xp); |
1433 | return err; | |
1434 | } | |
1435 | ||
f60f6b8f | 1436 | c.event = nlh->nlmsg_type; |
26b15dad | 1437 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1438 | c.portid = nlh->nlmsg_pid; |
26b15dad JHS |
1439 | km_policy_notify(xp, p->dir, &c); |
1440 | ||
1da177e4 LT |
1441 | xfrm_pol_put(xp); |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1447 | { | |
1448 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1449 | int i; | |
1450 | ||
1451 | if (xp->xfrm_nr == 0) | |
1452 | return 0; | |
1453 | ||
1454 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1455 | struct xfrm_user_tmpl *up = &vec[i]; | |
1456 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1457 | ||
1f86840f | 1458 | memset(up, 0, sizeof(*up)); |
1da177e4 | 1459 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
8511d01d | 1460 | up->family = kp->encap_family; |
1da177e4 LT |
1461 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1462 | up->reqid = kp->reqid; | |
1463 | up->mode = kp->mode; | |
1464 | up->share = kp->share; | |
1465 | up->optional = kp->optional; | |
1466 | up->aalgos = kp->aalgos; | |
1467 | up->ealgos = kp->ealgos; | |
1468 | up->calgos = kp->calgos; | |
1469 | } | |
df71837d | 1470 | |
c0144bea TG |
1471 | return nla_put(skb, XFRMA_TMPL, |
1472 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1473 | } |
1474 | ||
1475 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1476 | { | |
1477 | if (x->security) { | |
1478 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1479 | } |
1480 | return 0; | |
0d681623 | 1481 | } |
df71837d | 1482 | |
0d681623 SH |
1483 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1484 | { | |
1d1e34dd | 1485 | if (xp->security) |
0d681623 | 1486 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1487 | return 0; |
df71837d | 1488 | } |
cfbfd45a TG |
1489 | static inline size_t userpolicy_type_attrsize(void) |
1490 | { | |
1491 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1492 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1493 | #else | |
1494 | return 0; | |
1495 | #endif | |
1496 | } | |
df71837d | 1497 | |
f7b6983f | 1498 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1499 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1500 | { |
c0144bea TG |
1501 | struct xfrm_userpolicy_type upt = { |
1502 | .type = type, | |
1503 | }; | |
f7b6983f | 1504 | |
c0144bea | 1505 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1506 | } |
1507 | ||
1508 | #else | |
b798a9ed | 1509 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1510 | { |
1511 | return 0; | |
1512 | } | |
1513 | #endif | |
1514 | ||
1da177e4 LT |
1515 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1516 | { | |
1517 | struct xfrm_dump_info *sp = ptr; | |
1518 | struct xfrm_userpolicy_info *p; | |
1519 | struct sk_buff *in_skb = sp->in_skb; | |
1520 | struct sk_buff *skb = sp->out_skb; | |
1521 | struct nlmsghdr *nlh; | |
1d1e34dd | 1522 | int err; |
1da177e4 | 1523 | |
15e47304 | 1524 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
79b8b7f4 TG |
1525 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
1526 | if (nlh == NULL) | |
1527 | return -EMSGSIZE; | |
1da177e4 | 1528 | |
7b67c857 | 1529 | p = nlmsg_data(nlh); |
1da177e4 | 1530 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1531 | err = copy_to_user_tmpl(xp, skb); |
1532 | if (!err) | |
1533 | err = copy_to_user_sec_ctx(xp, skb); | |
1534 | if (!err) | |
1535 | err = copy_to_user_policy_type(xp->type, skb); | |
1536 | if (!err) | |
1537 | err = xfrm_mark_put(skb, &xp->mark); | |
1538 | if (err) { | |
1539 | nlmsg_cancel(skb, nlh); | |
1540 | return err; | |
1541 | } | |
9825069d | 1542 | nlmsg_end(skb, nlh); |
1da177e4 | 1543 | return 0; |
1da177e4 LT |
1544 | } |
1545 | ||
4c563f76 TT |
1546 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1547 | { | |
1548 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1549 | ||
1550 | xfrm_policy_walk_done(walk); | |
1551 | return 0; | |
1552 | } | |
1553 | ||
1da177e4 LT |
1554 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1555 | { | |
fc34acd3 | 1556 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1557 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1558 | struct xfrm_dump_info info; |
1559 | ||
4c563f76 TT |
1560 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1561 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1562 | ||
1da177e4 LT |
1563 | info.in_skb = cb->skb; |
1564 | info.out_skb = skb; | |
1565 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1566 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1567 | |
1568 | if (!cb->args[0]) { | |
1569 | cb->args[0] = 1; | |
1570 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1571 | } | |
1572 | ||
fc34acd3 | 1573 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1574 | |
1575 | return skb->len; | |
1576 | } | |
1577 | ||
1578 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1579 | struct xfrm_policy *xp, | |
1580 | int dir, u32 seq) | |
1581 | { | |
1582 | struct xfrm_dump_info info; | |
1583 | struct sk_buff *skb; | |
c2546372 | 1584 | int err; |
1da177e4 | 1585 | |
7deb2264 | 1586 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1587 | if (!skb) |
1588 | return ERR_PTR(-ENOMEM); | |
1589 | ||
1da177e4 LT |
1590 | info.in_skb = in_skb; |
1591 | info.out_skb = skb; | |
1592 | info.nlmsg_seq = seq; | |
1593 | info.nlmsg_flags = 0; | |
1da177e4 | 1594 | |
c2546372 MK |
1595 | err = dump_one_policy(xp, dir, 0, &info); |
1596 | if (err) { | |
1da177e4 | 1597 | kfree_skb(skb); |
c2546372 | 1598 | return ERR_PTR(err); |
1da177e4 LT |
1599 | } |
1600 | ||
1601 | return skb; | |
1602 | } | |
1603 | ||
22e70050 | 1604 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1605 | struct nlattr **attrs) |
1da177e4 | 1606 | { |
fc34acd3 | 1607 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1608 | struct xfrm_policy *xp; |
1609 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1610 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1611 | int err; |
26b15dad | 1612 | struct km_event c; |
1da177e4 | 1613 | int delete; |
295fae56 JHS |
1614 | struct xfrm_mark m; |
1615 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1616 | |
7b67c857 | 1617 | p = nlmsg_data(nlh); |
1da177e4 LT |
1618 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1619 | ||
35a7aa08 | 1620 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1621 | if (err) |
1622 | return err; | |
1623 | ||
1da177e4 LT |
1624 | err = verify_policy_dir(p->dir); |
1625 | if (err) | |
1626 | return err; | |
1627 | ||
1628 | if (p->index) | |
295fae56 | 1629 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1630 | else { |
5424f32e | 1631 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1632 | struct xfrm_sec_ctx *ctx; |
df71837d | 1633 | |
35a7aa08 | 1634 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1635 | if (err) |
1636 | return err; | |
1637 | ||
2c8dd116 | 1638 | ctx = NULL; |
df71837d | 1639 | if (rt) { |
5424f32e | 1640 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1641 | |
03e1ad7b PM |
1642 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1643 | if (err) | |
df71837d | 1644 | return err; |
2c8dd116 | 1645 | } |
295fae56 | 1646 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1647 | ctx, delete, &err); |
03e1ad7b | 1648 | security_xfrm_policy_free(ctx); |
df71837d | 1649 | } |
1da177e4 LT |
1650 | if (xp == NULL) |
1651 | return -ENOENT; | |
1652 | ||
1653 | if (!delete) { | |
1654 | struct sk_buff *resp_skb; | |
1655 | ||
1656 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1657 | if (IS_ERR(resp_skb)) { | |
1658 | err = PTR_ERR(resp_skb); | |
1659 | } else { | |
a6483b79 | 1660 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
15e47304 | 1661 | NETLINK_CB(skb).portid); |
1da177e4 | 1662 | } |
26b15dad | 1663 | } else { |
e1760bd5 | 1664 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
1665 | u32 sessionid = audit_get_sessionid(current); |
1666 | u32 sid; | |
2532386f | 1667 | |
c53fa1ed | 1668 | security_task_getsecid(current, &sid); |
2532386f EP |
1669 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, |
1670 | sid); | |
13fcfbb0 DM |
1671 | |
1672 | if (err != 0) | |
c8c05a8e | 1673 | goto out; |
13fcfbb0 | 1674 | |
e7443892 | 1675 | c.data.byid = p->index; |
f60f6b8f | 1676 | c.event = nlh->nlmsg_type; |
26b15dad | 1677 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1678 | c.portid = nlh->nlmsg_pid; |
26b15dad | 1679 | km_policy_notify(xp, p->dir, &c); |
1da177e4 LT |
1680 | } |
1681 | ||
c8c05a8e | 1682 | out: |
ef41aaa0 | 1683 | xfrm_pol_put(xp); |
e4c17216 PM |
1684 | if (delete && err == 0) |
1685 | xfrm_garbage_collect(net); | |
1da177e4 LT |
1686 | return err; |
1687 | } | |
1688 | ||
22e70050 | 1689 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1690 | struct nlattr **attrs) |
1da177e4 | 1691 | { |
fc34acd3 | 1692 | struct net *net = sock_net(skb->sk); |
26b15dad | 1693 | struct km_event c; |
7b67c857 | 1694 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1695 | struct xfrm_audit audit_info; |
4aa2e62c | 1696 | int err; |
1da177e4 | 1697 | |
c53fa1ed PM |
1698 | audit_info.loginuid = audit_get_loginuid(current); |
1699 | audit_info.sessionid = audit_get_sessionid(current); | |
1700 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1701 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1702 | if (err) { |
1703 | if (err == -ESRCH) /* empty table */ | |
1704 | return 0; | |
069c474e | 1705 | return err; |
9e64cc95 | 1706 | } |
bf08867f | 1707 | c.data.proto = p->proto; |
f60f6b8f | 1708 | c.event = nlh->nlmsg_type; |
26b15dad | 1709 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1710 | c.portid = nlh->nlmsg_pid; |
7067802e | 1711 | c.net = net; |
26b15dad JHS |
1712 | km_state_notify(NULL, &c); |
1713 | ||
1da177e4 LT |
1714 | return 0; |
1715 | } | |
1716 | ||
d8647b79 | 1717 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1718 | { |
d8647b79 SK |
1719 | size_t replay_size = x->replay_esn ? |
1720 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1721 | sizeof(struct xfrm_replay_state); | |
1722 | ||
7deb2264 | 1723 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1724 | + nla_total_size(replay_size) |
7deb2264 | 1725 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1726 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1727 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1728 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1729 | } | |
d51d081d | 1730 | |
214e005b | 1731 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1732 | { |
1733 | struct xfrm_aevent_id *id; | |
1734 | struct nlmsghdr *nlh; | |
1d1e34dd | 1735 | int err; |
d51d081d | 1736 | |
15e47304 | 1737 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
79b8b7f4 TG |
1738 | if (nlh == NULL) |
1739 | return -EMSGSIZE; | |
d51d081d | 1740 | |
7b67c857 | 1741 | id = nlmsg_data(nlh); |
2b5f6dcc | 1742 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1743 | id->sa_id.spi = x->id.spi; |
1744 | id->sa_id.family = x->props.family; | |
1745 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1746 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1747 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1748 | id->flags = c->data.aevent; |
1749 | ||
d0fde795 | 1750 | if (x->replay_esn) { |
1d1e34dd DM |
1751 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1752 | xfrm_replay_state_esn_len(x->replay_esn), | |
1753 | x->replay_esn); | |
d0fde795 | 1754 | } else { |
1d1e34dd DM |
1755 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1756 | &x->replay); | |
d0fde795 | 1757 | } |
1d1e34dd DM |
1758 | if (err) |
1759 | goto out_cancel; | |
1760 | err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
1761 | if (err) | |
1762 | goto out_cancel; | |
d51d081d | 1763 | |
1d1e34dd DM |
1764 | if (id->flags & XFRM_AE_RTHR) { |
1765 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1766 | if (err) | |
1767 | goto out_cancel; | |
1768 | } | |
1769 | if (id->flags & XFRM_AE_ETHR) { | |
1770 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1771 | x->replay_maxage * 10 / HZ); | |
1772 | if (err) | |
1773 | goto out_cancel; | |
1774 | } | |
1775 | err = xfrm_mark_put(skb, &x->mark); | |
1776 | if (err) | |
1777 | goto out_cancel; | |
6f26b61e | 1778 | |
9825069d | 1779 | return nlmsg_end(skb, nlh); |
d51d081d | 1780 | |
1d1e34dd | 1781 | out_cancel: |
9825069d | 1782 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1783 | return err; |
d51d081d JHS |
1784 | } |
1785 | ||
22e70050 | 1786 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1787 | struct nlattr **attrs) |
d51d081d | 1788 | { |
fc34acd3 | 1789 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1790 | struct xfrm_state *x; |
1791 | struct sk_buff *r_skb; | |
1792 | int err; | |
1793 | struct km_event c; | |
6f26b61e JHS |
1794 | u32 mark; |
1795 | struct xfrm_mark m; | |
7b67c857 | 1796 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1797 | struct xfrm_usersa_id *id = &p->sa_id; |
1798 | ||
6f26b61e JHS |
1799 | mark = xfrm_mark_get(attrs, &m); |
1800 | ||
1801 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1802 | if (x == NULL) |
d51d081d | 1803 | return -ESRCH; |
d8647b79 SK |
1804 | |
1805 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1806 | if (r_skb == NULL) { | |
1807 | xfrm_state_put(x); | |
1808 | return -ENOMEM; | |
d51d081d JHS |
1809 | } |
1810 | ||
1811 | /* | |
1812 | * XXX: is this lock really needed - none of the other | |
1813 | * gets lock (the concern is things getting updated | |
1814 | * while we are still reading) - jhs | |
1815 | */ | |
1816 | spin_lock_bh(&x->lock); | |
1817 | c.data.aevent = p->flags; | |
1818 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1819 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1820 | |
1821 | if (build_aevent(r_skb, x, &c) < 0) | |
1822 | BUG(); | |
15e47304 | 1823 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); |
d51d081d JHS |
1824 | spin_unlock_bh(&x->lock); |
1825 | xfrm_state_put(x); | |
1826 | return err; | |
1827 | } | |
1828 | ||
22e70050 | 1829 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1830 | struct nlattr **attrs) |
d51d081d | 1831 | { |
fc34acd3 | 1832 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1833 | struct xfrm_state *x; |
1834 | struct km_event c; | |
1835 | int err = - EINVAL; | |
6f26b61e JHS |
1836 | u32 mark = 0; |
1837 | struct xfrm_mark m; | |
7b67c857 | 1838 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1839 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1840 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1841 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1842 | |
d8647b79 | 1843 | if (!lt && !rp && !re) |
d51d081d JHS |
1844 | return err; |
1845 | ||
1846 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1847 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1848 | return err; | |
1849 | ||
6f26b61e JHS |
1850 | mark = xfrm_mark_get(attrs, &m); |
1851 | ||
1852 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1853 | if (x == NULL) |
1854 | return -ESRCH; | |
1855 | ||
1856 | if (x->km.state != XFRM_STATE_VALID) | |
1857 | goto out; | |
1858 | ||
e2b19125 SK |
1859 | err = xfrm_replay_verify_len(x->replay_esn, rp); |
1860 | if (err) | |
1861 | goto out; | |
1862 | ||
d51d081d | 1863 | spin_lock_bh(&x->lock); |
e3ac104d | 1864 | xfrm_update_ae_params(x, attrs, 1); |
d51d081d | 1865 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1866 | |
1867 | c.event = nlh->nlmsg_type; | |
1868 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1869 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1870 | c.data.aevent = XFRM_AE_CU; |
1871 | km_state_notify(x, &c); | |
1872 | err = 0; | |
1873 | out: | |
1874 | xfrm_state_put(x); | |
1875 | return err; | |
1876 | } | |
1877 | ||
22e70050 | 1878 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1879 | struct nlattr **attrs) |
1da177e4 | 1880 | { |
fc34acd3 | 1881 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1882 | struct km_event c; |
b798a9ed | 1883 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1884 | int err; |
161a09e7 | 1885 | struct xfrm_audit audit_info; |
f7b6983f | 1886 | |
35a7aa08 | 1887 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1888 | if (err) |
1889 | return err; | |
26b15dad | 1890 | |
c53fa1ed PM |
1891 | audit_info.loginuid = audit_get_loginuid(current); |
1892 | audit_info.sessionid = audit_get_sessionid(current); | |
1893 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1894 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1895 | if (err) { |
1896 | if (err == -ESRCH) /* empty table */ | |
1897 | return 0; | |
069c474e | 1898 | return err; |
2f1eb65f JHS |
1899 | } |
1900 | ||
f7b6983f | 1901 | c.data.type = type; |
f60f6b8f | 1902 | c.event = nlh->nlmsg_type; |
26b15dad | 1903 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1904 | c.portid = nlh->nlmsg_pid; |
7067802e | 1905 | c.net = net; |
26b15dad | 1906 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1907 | return 0; |
1908 | } | |
1909 | ||
22e70050 | 1910 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1911 | struct nlattr **attrs) |
6c5c8ca7 | 1912 | { |
fc34acd3 | 1913 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1914 | struct xfrm_policy *xp; |
7b67c857 | 1915 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1916 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1917 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1918 | int err = -ENOENT; |
295fae56 JHS |
1919 | struct xfrm_mark m; |
1920 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1921 | |
35a7aa08 | 1922 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1923 | if (err) |
1924 | return err; | |
1925 | ||
c8bf4d04 TT |
1926 | err = verify_policy_dir(p->dir); |
1927 | if (err) | |
1928 | return err; | |
1929 | ||
6c5c8ca7 | 1930 | if (p->index) |
295fae56 | 1931 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1932 | else { |
5424f32e | 1933 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1934 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1935 | |
35a7aa08 | 1936 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1937 | if (err) |
1938 | return err; | |
1939 | ||
2c8dd116 | 1940 | ctx = NULL; |
6c5c8ca7 | 1941 | if (rt) { |
5424f32e | 1942 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1943 | |
03e1ad7b PM |
1944 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1945 | if (err) | |
6c5c8ca7 | 1946 | return err; |
2c8dd116 | 1947 | } |
295fae56 | 1948 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1949 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1950 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1951 | } |
6c5c8ca7 | 1952 | if (xp == NULL) |
ef41aaa0 | 1953 | return -ENOENT; |
03e1ad7b | 1954 | |
ea2dea9d | 1955 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1956 | goto out; |
6c5c8ca7 | 1957 | |
6c5c8ca7 JHS |
1958 | err = 0; |
1959 | if (up->hard) { | |
e1760bd5 | 1960 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
1961 | u32 sessionid = audit_get_sessionid(current); |
1962 | u32 sid; | |
1963 | ||
1964 | security_task_getsecid(current, &sid); | |
6c5c8ca7 | 1965 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1966 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1967 | |
6c5c8ca7 JHS |
1968 | } else { |
1969 | // reset the timers here? | |
62db5cfd | 1970 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 | 1971 | } |
c6bb8136 | 1972 | km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); |
6c5c8ca7 JHS |
1973 | |
1974 | out: | |
1975 | xfrm_pol_put(xp); | |
1976 | return err; | |
1977 | } | |
1978 | ||
22e70050 | 1979 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1980 | struct nlattr **attrs) |
53bc6b4d | 1981 | { |
fc34acd3 | 1982 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1983 | struct xfrm_state *x; |
1984 | int err; | |
7b67c857 | 1985 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1986 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 1987 | struct xfrm_mark m; |
928497f0 | 1988 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 1989 | |
6f26b61e | 1990 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1991 | |
3a765aa5 | 1992 | err = -ENOENT; |
53bc6b4d JHS |
1993 | if (x == NULL) |
1994 | return err; | |
1995 | ||
53bc6b4d | 1996 | spin_lock_bh(&x->lock); |
3a765aa5 | 1997 | err = -EINVAL; |
53bc6b4d JHS |
1998 | if (x->km.state != XFRM_STATE_VALID) |
1999 | goto out; | |
c6bb8136 | 2000 | km_state_expired(x, ue->hard, nlh->nlmsg_pid); |
53bc6b4d | 2001 | |
161a09e7 | 2002 | if (ue->hard) { |
e1760bd5 | 2003 | kuid_t loginuid = audit_get_loginuid(current); |
c53fa1ed PM |
2004 | u32 sessionid = audit_get_sessionid(current); |
2005 | u32 sid; | |
2006 | ||
2007 | security_task_getsecid(current, &sid); | |
53bc6b4d | 2008 | __xfrm_state_delete(x); |
2532386f | 2009 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 2010 | } |
3a765aa5 | 2011 | err = 0; |
53bc6b4d JHS |
2012 | out: |
2013 | spin_unlock_bh(&x->lock); | |
2014 | xfrm_state_put(x); | |
2015 | return err; | |
2016 | } | |
2017 | ||
22e70050 | 2018 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2019 | struct nlattr **attrs) |
980ebd25 | 2020 | { |
fc34acd3 | 2021 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
2022 | struct xfrm_policy *xp; |
2023 | struct xfrm_user_tmpl *ut; | |
2024 | int i; | |
5424f32e | 2025 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 2026 | struct xfrm_mark mark; |
980ebd25 | 2027 | |
7b67c857 | 2028 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 2029 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
2030 | int err = -ENOMEM; |
2031 | ||
2032 | if (!x) | |
d8eb9307 | 2033 | goto nomem; |
980ebd25 | 2034 | |
6f26b61e JHS |
2035 | xfrm_mark_get(attrs, &mark); |
2036 | ||
980ebd25 | 2037 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2038 | if (err) |
2039 | goto bad_policy; | |
980ebd25 JHS |
2040 | |
2041 | /* build an XP */ | |
fc34acd3 | 2042 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2043 | if (!xp) |
2044 | goto free_state; | |
980ebd25 JHS |
2045 | |
2046 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2047 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2048 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2049 | xp->mark.m = x->mark.m = mark.m; |
2050 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2051 | ut = nla_data(rt); |
980ebd25 JHS |
2052 | /* extract the templates and for each call km_key */ |
2053 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2054 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2055 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2056 | x->props.mode = t->mode; | |
2057 | x->props.reqid = t->reqid; | |
2058 | x->props.family = ut->family; | |
2059 | t->aalgos = ua->aalgos; | |
2060 | t->ealgos = ua->ealgos; | |
2061 | t->calgos = ua->calgos; | |
2062 | err = km_query(x, t, xp); | |
2063 | ||
2064 | } | |
2065 | ||
2066 | kfree(x); | |
2067 | kfree(xp); | |
2068 | ||
2069 | return 0; | |
d8eb9307 IJ |
2070 | |
2071 | bad_policy: | |
62db5cfd | 2072 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2073 | free_state: |
2074 | kfree(x); | |
2075 | nomem: | |
2076 | return err; | |
980ebd25 JHS |
2077 | } |
2078 | ||
5c79de6e | 2079 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2080 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2081 | struct xfrm_kmaddress *k, |
5424f32e | 2082 | struct nlattr **attrs, int *num) |
5c79de6e | 2083 | { |
5424f32e | 2084 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2085 | struct xfrm_user_migrate *um; |
2086 | int i, num_migrate; | |
2087 | ||
13c1d189 AE |
2088 | if (k != NULL) { |
2089 | struct xfrm_user_kmaddress *uk; | |
2090 | ||
2091 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2092 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2093 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2094 | k->family = uk->family; | |
2095 | k->reserved = uk->reserved; | |
2096 | } | |
2097 | ||
5424f32e TG |
2098 | um = nla_data(rt); |
2099 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2100 | |
2101 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2102 | return -EINVAL; | |
2103 | ||
2104 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2105 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2106 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2107 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2108 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2109 | ||
2110 | ma->proto = um->proto; | |
2111 | ma->mode = um->mode; | |
2112 | ma->reqid = um->reqid; | |
2113 | ||
2114 | ma->old_family = um->old_family; | |
2115 | ma->new_family = um->new_family; | |
2116 | } | |
2117 | ||
2118 | *num = i; | |
2119 | return 0; | |
2120 | } | |
2121 | ||
2122 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2123 | struct nlattr **attrs) |
5c79de6e | 2124 | { |
7b67c857 | 2125 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2126 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2127 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2128 | u8 type; |
2129 | int err; | |
2130 | int n = 0; | |
2131 | ||
35a7aa08 | 2132 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2133 | return -EINVAL; |
5c79de6e | 2134 | |
13c1d189 AE |
2135 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2136 | ||
5424f32e | 2137 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2138 | if (err) |
2139 | return err; | |
2140 | ||
13c1d189 | 2141 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2142 | if (err) |
2143 | return err; | |
2144 | ||
2145 | if (!n) | |
2146 | return 0; | |
2147 | ||
13c1d189 | 2148 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
2149 | |
2150 | return 0; | |
2151 | } | |
2152 | #else | |
2153 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2154 | struct nlattr **attrs) |
5c79de6e SS |
2155 | { |
2156 | return -ENOPROTOOPT; | |
2157 | } | |
2158 | #endif | |
2159 | ||
2160 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2161 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2162 | { |
2163 | struct xfrm_user_migrate um; | |
2164 | ||
2165 | memset(&um, 0, sizeof(um)); | |
2166 | um.proto = m->proto; | |
2167 | um.mode = m->mode; | |
2168 | um.reqid = m->reqid; | |
2169 | um.old_family = m->old_family; | |
2170 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2171 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2172 | um.new_family = m->new_family; | |
2173 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2174 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2175 | ||
c0144bea | 2176 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2177 | } |
2178 | ||
183cad12 | 2179 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2180 | { |
2181 | struct xfrm_user_kmaddress uk; | |
2182 | ||
2183 | memset(&uk, 0, sizeof(uk)); | |
2184 | uk.family = k->family; | |
2185 | uk.reserved = k->reserved; | |
2186 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2187 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2188 | |
2189 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2190 | } | |
2191 | ||
2192 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2193 | { |
2194 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2195 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2196 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2197 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2198 | } |
2199 | ||
183cad12 DM |
2200 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2201 | int num_migrate, const struct xfrm_kmaddress *k, | |
2202 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2203 | { |
183cad12 | 2204 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2205 | struct xfrm_userpolicy_id *pol_id; |
2206 | struct nlmsghdr *nlh; | |
1d1e34dd | 2207 | int i, err; |
5c79de6e | 2208 | |
79b8b7f4 TG |
2209 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2210 | if (nlh == NULL) | |
2211 | return -EMSGSIZE; | |
5c79de6e | 2212 | |
7b67c857 | 2213 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2214 | /* copy data from selector, dir, and type to the pol_id */ |
2215 | memset(pol_id, 0, sizeof(*pol_id)); | |
2216 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2217 | pol_id->dir = dir; | |
2218 | ||
1d1e34dd DM |
2219 | if (k != NULL) { |
2220 | err = copy_to_user_kmaddress(k, skb); | |
2221 | if (err) | |
2222 | goto out_cancel; | |
2223 | } | |
2224 | err = copy_to_user_policy_type(type, skb); | |
2225 | if (err) | |
2226 | goto out_cancel; | |
5c79de6e | 2227 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2228 | err = copy_to_user_migrate(mp, skb); |
2229 | if (err) | |
2230 | goto out_cancel; | |
5c79de6e SS |
2231 | } |
2232 | ||
9825069d | 2233 | return nlmsg_end(skb, nlh); |
1d1e34dd DM |
2234 | |
2235 | out_cancel: | |
9825069d | 2236 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2237 | return err; |
5c79de6e SS |
2238 | } |
2239 | ||
183cad12 DM |
2240 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2241 | const struct xfrm_migrate *m, int num_migrate, | |
2242 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2243 | { |
a6483b79 | 2244 | struct net *net = &init_net; |
5c79de6e | 2245 | struct sk_buff *skb; |
5c79de6e | 2246 | |
13c1d189 | 2247 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2248 | if (skb == NULL) |
2249 | return -ENOMEM; | |
2250 | ||
2251 | /* build migrate */ | |
13c1d189 | 2252 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2253 | BUG(); |
2254 | ||
a6483b79 | 2255 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2256 | } |
2257 | #else | |
183cad12 DM |
2258 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2259 | const struct xfrm_migrate *m, int num_migrate, | |
2260 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2261 | { |
2262 | return -ENOPROTOOPT; | |
2263 | } | |
2264 | #endif | |
d51d081d | 2265 | |
a7bd9a45 | 2266 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2267 | |
2268 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2269 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2270 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2271 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2272 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2273 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2274 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2275 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2276 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2277 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2278 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2279 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2280 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2281 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2282 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2283 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2284 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2285 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2286 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2287 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2288 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2289 | }; |
2290 | ||
492b558b TG |
2291 | #undef XMSGSIZE |
2292 | ||
cf5cb79f | 2293 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2294 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2295 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2296 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2297 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2298 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2299 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2300 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2301 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2302 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2303 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2304 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2305 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2306 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2307 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2308 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2309 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2310 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2311 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2312 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2313 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2314 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2315 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2316 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
a947b0a9 | 2317 | [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, |
cf5cb79f TG |
2318 | }; |
2319 | ||
05600a79 | 2320 | static const struct xfrm_link { |
5424f32e | 2321 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2322 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2323 | int (*done)(struct netlink_callback *); |
492b558b TG |
2324 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2325 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2326 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2327 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2328 | .dump = xfrm_dump_sa, |
2329 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2330 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2331 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2332 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2333 | .dump = xfrm_dump_policy, |
2334 | .done = xfrm_dump_policy_done }, | |
492b558b | 2335 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2336 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2337 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2338 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2339 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2340 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2341 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2342 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2343 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2344 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2345 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2346 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2347 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2348 | }; |
2349 | ||
1d00a4eb | 2350 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2351 | { |
a6483b79 | 2352 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2353 | struct nlattr *attrs[XFRMA_MAX+1]; |
05600a79 | 2354 | const struct xfrm_link *link; |
a7bd9a45 | 2355 | int type, err; |
1da177e4 | 2356 | |
1da177e4 | 2357 | type = nlh->nlmsg_type; |
1da177e4 | 2358 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2359 | return -EINVAL; |
1da177e4 LT |
2360 | |
2361 | type -= XFRM_MSG_BASE; | |
2362 | link = &xfrm_dispatch[type]; | |
2363 | ||
2364 | /* All operations require privileges, even GET */ | |
df008c91 | 2365 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1d00a4eb | 2366 | return -EPERM; |
1da177e4 | 2367 | |
492b558b TG |
2368 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2369 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2370 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2371 | if (link->dump == NULL) |
1d00a4eb | 2372 | return -EINVAL; |
88fc2c84 | 2373 | |
80d326fa PNA |
2374 | { |
2375 | struct netlink_dump_control c = { | |
2376 | .dump = link->dump, | |
2377 | .done = link->done, | |
2378 | }; | |
2379 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2380 | } | |
1da177e4 LT |
2381 | } |
2382 | ||
35a7aa08 | 2383 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2384 | xfrma_policy); |
a7bd9a45 TG |
2385 | if (err < 0) |
2386 | return err; | |
1da177e4 LT |
2387 | |
2388 | if (link->doit == NULL) | |
1d00a4eb | 2389 | return -EINVAL; |
1da177e4 | 2390 | |
5424f32e | 2391 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2392 | } |
2393 | ||
cd40b7d3 | 2394 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2395 | { |
cd40b7d3 DL |
2396 | mutex_lock(&xfrm_cfg_mutex); |
2397 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2398 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2399 | } |
2400 | ||
7deb2264 TG |
2401 | static inline size_t xfrm_expire_msgsize(void) |
2402 | { | |
6f26b61e JHS |
2403 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2404 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2405 | } |
2406 | ||
214e005b | 2407 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2408 | { |
2409 | struct xfrm_user_expire *ue; | |
2410 | struct nlmsghdr *nlh; | |
1d1e34dd | 2411 | int err; |
1da177e4 | 2412 | |
15e47304 | 2413 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
79b8b7f4 TG |
2414 | if (nlh == NULL) |
2415 | return -EMSGSIZE; | |
1da177e4 | 2416 | |
7b67c857 | 2417 | ue = nlmsg_data(nlh); |
1da177e4 | 2418 | copy_to_user_state(x, &ue->state); |
d51d081d | 2419 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2420 | |
1d1e34dd DM |
2421 | err = xfrm_mark_put(skb, &x->mark); |
2422 | if (err) | |
2423 | return err; | |
6f26b61e | 2424 | |
9825069d | 2425 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2426 | } |
2427 | ||
214e005b | 2428 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2429 | { |
fc34acd3 | 2430 | struct net *net = xs_net(x); |
1da177e4 LT |
2431 | struct sk_buff *skb; |
2432 | ||
7deb2264 | 2433 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2434 | if (skb == NULL) |
2435 | return -ENOMEM; | |
2436 | ||
6f26b61e JHS |
2437 | if (build_expire(skb, x, c) < 0) { |
2438 | kfree_skb(skb); | |
2439 | return -EMSGSIZE; | |
2440 | } | |
1da177e4 | 2441 | |
a6483b79 | 2442 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2443 | } |
2444 | ||
214e005b | 2445 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2446 | { |
fc34acd3 | 2447 | struct net *net = xs_net(x); |
d51d081d | 2448 | struct sk_buff *skb; |
d51d081d | 2449 | |
d8647b79 | 2450 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2451 | if (skb == NULL) |
2452 | return -ENOMEM; | |
2453 | ||
2454 | if (build_aevent(skb, x, c) < 0) | |
2455 | BUG(); | |
2456 | ||
a6483b79 | 2457 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2458 | } |
2459 | ||
214e005b | 2460 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2461 | { |
7067802e | 2462 | struct net *net = c->net; |
26b15dad JHS |
2463 | struct xfrm_usersa_flush *p; |
2464 | struct nlmsghdr *nlh; | |
2465 | struct sk_buff *skb; | |
7deb2264 | 2466 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2467 | |
7deb2264 | 2468 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2469 | if (skb == NULL) |
2470 | return -ENOMEM; | |
26b15dad | 2471 | |
15e47304 | 2472 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
79b8b7f4 TG |
2473 | if (nlh == NULL) { |
2474 | kfree_skb(skb); | |
2475 | return -EMSGSIZE; | |
2476 | } | |
26b15dad | 2477 | |
7b67c857 | 2478 | p = nlmsg_data(nlh); |
bf08867f | 2479 | p->proto = c->data.proto; |
26b15dad | 2480 | |
9825069d | 2481 | nlmsg_end(skb, nlh); |
26b15dad | 2482 | |
a6483b79 | 2483 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2484 | } |
2485 | ||
7deb2264 | 2486 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2487 | { |
7deb2264 | 2488 | size_t l = 0; |
1a6509d9 HX |
2489 | if (x->aead) |
2490 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2491 | if (x->aalg) { |
2492 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2493 | (x->aalg->alg_key_len + 7) / 8); | |
2494 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2495 | } | |
26b15dad | 2496 | if (x->ealg) |
0f99be0d | 2497 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2498 | if (x->calg) |
7deb2264 | 2499 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2500 | if (x->encap) |
7deb2264 | 2501 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2502 | if (x->tfcpad) |
2503 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2504 | if (x->replay_esn) |
2505 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
68325d3b HX |
2506 | if (x->security) |
2507 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2508 | x->security->ctx_len); | |
2509 | if (x->coaddr) | |
2510 | l += nla_total_size(sizeof(*x->coaddr)); | |
a947b0a9 ND |
2511 | if (x->props.extra_flags) |
2512 | l += nla_total_size(sizeof(x->props.extra_flags)); | |
68325d3b | 2513 | |
d26f3984 HX |
2514 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2515 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2516 | |
2517 | return l; | |
2518 | } | |
2519 | ||
214e005b | 2520 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2521 | { |
fc34acd3 | 2522 | struct net *net = xs_net(x); |
26b15dad | 2523 | struct xfrm_usersa_info *p; |
0603eac0 | 2524 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2525 | struct nlmsghdr *nlh; |
2526 | struct sk_buff *skb; | |
26b15dad | 2527 | int len = xfrm_sa_len(x); |
1d1e34dd | 2528 | int headlen, err; |
0603eac0 HX |
2529 | |
2530 | headlen = sizeof(*p); | |
2531 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2532 | len += nla_total_size(headlen); |
0603eac0 | 2533 | headlen = sizeof(*id); |
6f26b61e | 2534 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2535 | } |
7deb2264 | 2536 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2537 | |
7deb2264 | 2538 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2539 | if (skb == NULL) |
2540 | return -ENOMEM; | |
26b15dad | 2541 | |
15e47304 | 2542 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2543 | err = -EMSGSIZE; |
79b8b7f4 | 2544 | if (nlh == NULL) |
1d1e34dd | 2545 | goto out_free_skb; |
26b15dad | 2546 | |
7b67c857 | 2547 | p = nlmsg_data(nlh); |
0603eac0 | 2548 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2549 | struct nlattr *attr; |
2550 | ||
7b67c857 | 2551 | id = nlmsg_data(nlh); |
0603eac0 HX |
2552 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2553 | id->spi = x->id.spi; | |
2554 | id->family = x->props.family; | |
2555 | id->proto = x->id.proto; | |
2556 | ||
c0144bea | 2557 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2558 | err = -EMSGSIZE; |
c0144bea | 2559 | if (attr == NULL) |
1d1e34dd | 2560 | goto out_free_skb; |
c0144bea TG |
2561 | |
2562 | p = nla_data(attr); | |
0603eac0 | 2563 | } |
1d1e34dd DM |
2564 | err = copy_to_user_state_extra(x, p, skb); |
2565 | if (err) | |
2566 | goto out_free_skb; | |
26b15dad | 2567 | |
9825069d | 2568 | nlmsg_end(skb, nlh); |
26b15dad | 2569 | |
a6483b79 | 2570 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2571 | |
1d1e34dd | 2572 | out_free_skb: |
26b15dad | 2573 | kfree_skb(skb); |
1d1e34dd | 2574 | return err; |
26b15dad JHS |
2575 | } |
2576 | ||
214e005b | 2577 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2578 | { |
2579 | ||
2580 | switch (c->event) { | |
f60f6b8f | 2581 | case XFRM_MSG_EXPIRE: |
26b15dad | 2582 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2583 | case XFRM_MSG_NEWAE: |
2584 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2585 | case XFRM_MSG_DELSA: |
2586 | case XFRM_MSG_UPDSA: | |
2587 | case XFRM_MSG_NEWSA: | |
26b15dad | 2588 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2589 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2590 | return xfrm_notify_sa_flush(c); |
2591 | default: | |
62db5cfd | 2592 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2593 | c->event); | |
2594 | break; | |
26b15dad JHS |
2595 | } |
2596 | ||
2597 | return 0; | |
2598 | ||
2599 | } | |
2600 | ||
7deb2264 TG |
2601 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2602 | struct xfrm_policy *xp) | |
2603 | { | |
2604 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2605 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2606 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2607 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2608 | + userpolicy_type_attrsize(); | |
2609 | } | |
2610 | ||
1da177e4 | 2611 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
65e0736b | 2612 | struct xfrm_tmpl *xt, struct xfrm_policy *xp) |
1da177e4 | 2613 | { |
1d1e34dd | 2614 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2615 | struct xfrm_user_acquire *ua; |
2616 | struct nlmsghdr *nlh; | |
1d1e34dd | 2617 | int err; |
1da177e4 | 2618 | |
79b8b7f4 TG |
2619 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2620 | if (nlh == NULL) | |
2621 | return -EMSGSIZE; | |
1da177e4 | 2622 | |
7b67c857 | 2623 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2624 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2625 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2626 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
65e0736b | 2627 | copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); |
1da177e4 LT |
2628 | ua->aalgos = xt->aalgos; |
2629 | ua->ealgos = xt->ealgos; | |
2630 | ua->calgos = xt->calgos; | |
2631 | ua->seq = x->km.seq = seq; | |
2632 | ||
1d1e34dd DM |
2633 | err = copy_to_user_tmpl(xp, skb); |
2634 | if (!err) | |
2635 | err = copy_to_user_state_sec_ctx(x, skb); | |
2636 | if (!err) | |
2637 | err = copy_to_user_policy_type(xp->type, skb); | |
2638 | if (!err) | |
2639 | err = xfrm_mark_put(skb, &xp->mark); | |
2640 | if (err) { | |
2641 | nlmsg_cancel(skb, nlh); | |
2642 | return err; | |
2643 | } | |
1da177e4 | 2644 | |
9825069d | 2645 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2646 | } |
2647 | ||
2648 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
65e0736b | 2649 | struct xfrm_policy *xp) |
1da177e4 | 2650 | { |
a6483b79 | 2651 | struct net *net = xs_net(x); |
1da177e4 | 2652 | struct sk_buff *skb; |
1da177e4 | 2653 | |
7deb2264 | 2654 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2655 | if (skb == NULL) |
2656 | return -ENOMEM; | |
2657 | ||
65e0736b | 2658 | if (build_acquire(skb, x, xt, xp) < 0) |
1da177e4 LT |
2659 | BUG(); |
2660 | ||
a6483b79 | 2661 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2662 | } |
2663 | ||
2664 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2665 | * or more templates. | |
2666 | */ | |
cb969f07 | 2667 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2668 | u8 *data, int len, int *dir) |
2669 | { | |
fc34acd3 | 2670 | struct net *net = sock_net(sk); |
1da177e4 LT |
2671 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2672 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2673 | struct xfrm_policy *xp; | |
2674 | int nr; | |
2675 | ||
cb969f07 | 2676 | switch (sk->sk_family) { |
1da177e4 LT |
2677 | case AF_INET: |
2678 | if (opt != IP_XFRM_POLICY) { | |
2679 | *dir = -EOPNOTSUPP; | |
2680 | return NULL; | |
2681 | } | |
2682 | break; | |
dfd56b8b | 2683 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2684 | case AF_INET6: |
2685 | if (opt != IPV6_XFRM_POLICY) { | |
2686 | *dir = -EOPNOTSUPP; | |
2687 | return NULL; | |
2688 | } | |
2689 | break; | |
2690 | #endif | |
2691 | default: | |
2692 | *dir = -EINVAL; | |
2693 | return NULL; | |
2694 | } | |
2695 | ||
2696 | *dir = -EINVAL; | |
2697 | ||
2698 | if (len < sizeof(*p) || | |
2699 | verify_newpolicy_info(p)) | |
2700 | return NULL; | |
2701 | ||
2702 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2703 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2704 | return NULL; |
2705 | ||
a4f1bac6 HX |
2706 | if (p->dir > XFRM_POLICY_OUT) |
2707 | return NULL; | |
2708 | ||
2f09a4d5 | 2709 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2710 | if (xp == NULL) { |
2711 | *dir = -ENOBUFS; | |
2712 | return NULL; | |
2713 | } | |
2714 | ||
2715 | copy_from_user_policy(xp, p); | |
f7b6983f | 2716 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2717 | copy_templates(xp, ut, nr); |
2718 | ||
2719 | *dir = p->dir; | |
2720 | ||
2721 | return xp; | |
2722 | } | |
2723 | ||
7deb2264 TG |
2724 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2725 | { | |
2726 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2727 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2728 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2729 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2730 | + userpolicy_type_attrsize(); |
2731 | } | |
2732 | ||
1da177e4 | 2733 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2734 | int dir, const struct km_event *c) |
1da177e4 LT |
2735 | { |
2736 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2737 | int hard = c->data.hard; |
1d1e34dd DM |
2738 | struct nlmsghdr *nlh; |
2739 | int err; | |
1da177e4 | 2740 | |
15e47304 | 2741 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
79b8b7f4 TG |
2742 | if (nlh == NULL) |
2743 | return -EMSGSIZE; | |
1da177e4 | 2744 | |
7b67c857 | 2745 | upe = nlmsg_data(nlh); |
1da177e4 | 2746 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2747 | err = copy_to_user_tmpl(xp, skb); |
2748 | if (!err) | |
2749 | err = copy_to_user_sec_ctx(xp, skb); | |
2750 | if (!err) | |
2751 | err = copy_to_user_policy_type(xp->type, skb); | |
2752 | if (!err) | |
2753 | err = xfrm_mark_put(skb, &xp->mark); | |
2754 | if (err) { | |
2755 | nlmsg_cancel(skb, nlh); | |
2756 | return err; | |
2757 | } | |
1da177e4 LT |
2758 | upe->hard = !!hard; |
2759 | ||
9825069d | 2760 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2761 | } |
2762 | ||
214e005b | 2763 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2764 | { |
fc34acd3 | 2765 | struct net *net = xp_net(xp); |
1da177e4 | 2766 | struct sk_buff *skb; |
1da177e4 | 2767 | |
7deb2264 | 2768 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2769 | if (skb == NULL) |
2770 | return -ENOMEM; | |
2771 | ||
d51d081d | 2772 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2773 | BUG(); |
2774 | ||
a6483b79 | 2775 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2776 | } |
2777 | ||
214e005b | 2778 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2779 | { |
1d1e34dd | 2780 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2781 | struct net *net = xp_net(xp); |
26b15dad | 2782 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2783 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2784 | struct nlmsghdr *nlh; |
2785 | struct sk_buff *skb; | |
1d1e34dd | 2786 | int headlen, err; |
0603eac0 HX |
2787 | |
2788 | headlen = sizeof(*p); | |
2789 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2790 | len += nla_total_size(headlen); |
0603eac0 HX |
2791 | headlen = sizeof(*id); |
2792 | } | |
cfbfd45a | 2793 | len += userpolicy_type_attrsize(); |
295fae56 | 2794 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2795 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2796 | |
7deb2264 | 2797 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2798 | if (skb == NULL) |
2799 | return -ENOMEM; | |
26b15dad | 2800 | |
15e47304 | 2801 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2802 | err = -EMSGSIZE; |
79b8b7f4 | 2803 | if (nlh == NULL) |
1d1e34dd | 2804 | goto out_free_skb; |
26b15dad | 2805 | |
7b67c857 | 2806 | p = nlmsg_data(nlh); |
0603eac0 | 2807 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2808 | struct nlattr *attr; |
2809 | ||
7b67c857 | 2810 | id = nlmsg_data(nlh); |
0603eac0 HX |
2811 | memset(id, 0, sizeof(*id)); |
2812 | id->dir = dir; | |
2813 | if (c->data.byid) | |
2814 | id->index = xp->index; | |
2815 | else | |
2816 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2817 | ||
c0144bea | 2818 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2819 | err = -EMSGSIZE; |
c0144bea | 2820 | if (attr == NULL) |
1d1e34dd | 2821 | goto out_free_skb; |
c0144bea TG |
2822 | |
2823 | p = nla_data(attr); | |
0603eac0 | 2824 | } |
26b15dad | 2825 | |
26b15dad | 2826 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2827 | err = copy_to_user_tmpl(xp, skb); |
2828 | if (!err) | |
2829 | err = copy_to_user_policy_type(xp->type, skb); | |
2830 | if (!err) | |
2831 | err = xfrm_mark_put(skb, &xp->mark); | |
2832 | if (err) | |
2833 | goto out_free_skb; | |
295fae56 | 2834 | |
9825069d | 2835 | nlmsg_end(skb, nlh); |
26b15dad | 2836 | |
a6483b79 | 2837 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2838 | |
1d1e34dd | 2839 | out_free_skb: |
26b15dad | 2840 | kfree_skb(skb); |
1d1e34dd | 2841 | return err; |
26b15dad JHS |
2842 | } |
2843 | ||
214e005b | 2844 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2845 | { |
7067802e | 2846 | struct net *net = c->net; |
26b15dad JHS |
2847 | struct nlmsghdr *nlh; |
2848 | struct sk_buff *skb; | |
1d1e34dd | 2849 | int err; |
26b15dad | 2850 | |
7deb2264 | 2851 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2852 | if (skb == NULL) |
2853 | return -ENOMEM; | |
26b15dad | 2854 | |
15e47304 | 2855 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2856 | err = -EMSGSIZE; |
79b8b7f4 | 2857 | if (nlh == NULL) |
1d1e34dd DM |
2858 | goto out_free_skb; |
2859 | err = copy_to_user_policy_type(c->data.type, skb); | |
2860 | if (err) | |
2861 | goto out_free_skb; | |
26b15dad | 2862 | |
9825069d | 2863 | nlmsg_end(skb, nlh); |
26b15dad | 2864 | |
a6483b79 | 2865 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2866 | |
1d1e34dd | 2867 | out_free_skb: |
26b15dad | 2868 | kfree_skb(skb); |
1d1e34dd | 2869 | return err; |
26b15dad JHS |
2870 | } |
2871 | ||
214e005b | 2872 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2873 | { |
2874 | ||
2875 | switch (c->event) { | |
f60f6b8f HX |
2876 | case XFRM_MSG_NEWPOLICY: |
2877 | case XFRM_MSG_UPDPOLICY: | |
2878 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2879 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2880 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2881 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2882 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2883 | return xfrm_exp_policy_notify(xp, dir, c); |
2884 | default: | |
62db5cfd | 2885 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2886 | c->event); | |
26b15dad JHS |
2887 | } |
2888 | ||
2889 | return 0; | |
2890 | ||
2891 | } | |
2892 | ||
7deb2264 TG |
2893 | static inline size_t xfrm_report_msgsize(void) |
2894 | { | |
2895 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2896 | } | |
2897 | ||
97a64b45 MN |
2898 | static int build_report(struct sk_buff *skb, u8 proto, |
2899 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2900 | { | |
2901 | struct xfrm_user_report *ur; | |
2902 | struct nlmsghdr *nlh; | |
97a64b45 | 2903 | |
79b8b7f4 TG |
2904 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2905 | if (nlh == NULL) | |
2906 | return -EMSGSIZE; | |
97a64b45 | 2907 | |
7b67c857 | 2908 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2909 | ur->proto = proto; |
2910 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2911 | ||
1d1e34dd DM |
2912 | if (addr) { |
2913 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
2914 | if (err) { | |
2915 | nlmsg_cancel(skb, nlh); | |
2916 | return err; | |
2917 | } | |
2918 | } | |
9825069d | 2919 | return nlmsg_end(skb, nlh); |
97a64b45 MN |
2920 | } |
2921 | ||
db983c11 AD |
2922 | static int xfrm_send_report(struct net *net, u8 proto, |
2923 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2924 | { |
2925 | struct sk_buff *skb; | |
97a64b45 | 2926 | |
7deb2264 | 2927 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2928 | if (skb == NULL) |
2929 | return -ENOMEM; | |
2930 | ||
2931 | if (build_report(skb, proto, sel, addr) < 0) | |
2932 | BUG(); | |
2933 | ||
a6483b79 | 2934 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2935 | } |
2936 | ||
3a2dfbe8 MW |
2937 | static inline size_t xfrm_mapping_msgsize(void) |
2938 | { | |
2939 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2940 | } | |
2941 | ||
2942 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2943 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2944 | { | |
2945 | struct xfrm_user_mapping *um; | |
2946 | struct nlmsghdr *nlh; | |
2947 | ||
2948 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2949 | if (nlh == NULL) | |
2950 | return -EMSGSIZE; | |
2951 | ||
2952 | um = nlmsg_data(nlh); | |
2953 | ||
2954 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2955 | um->id.spi = x->id.spi; | |
2956 | um->id.family = x->props.family; | |
2957 | um->id.proto = x->id.proto; | |
2958 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2959 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2960 | um->new_sport = new_sport; | |
2961 | um->old_sport = x->encap->encap_sport; | |
2962 | um->reqid = x->props.reqid; | |
2963 | ||
2964 | return nlmsg_end(skb, nlh); | |
2965 | } | |
2966 | ||
2967 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2968 | __be16 sport) | |
2969 | { | |
a6483b79 | 2970 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2971 | struct sk_buff *skb; |
2972 | ||
2973 | if (x->id.proto != IPPROTO_ESP) | |
2974 | return -EINVAL; | |
2975 | ||
2976 | if (!x->encap) | |
2977 | return -EINVAL; | |
2978 | ||
2979 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2980 | if (skb == NULL) | |
2981 | return -ENOMEM; | |
2982 | ||
2983 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2984 | BUG(); | |
2985 | ||
a6483b79 | 2986 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2987 | } |
2988 | ||
1da177e4 LT |
2989 | static struct xfrm_mgr netlink_mgr = { |
2990 | .id = "netlink", | |
2991 | .notify = xfrm_send_state_notify, | |
2992 | .acquire = xfrm_send_acquire, | |
2993 | .compile_policy = xfrm_compile_policy, | |
2994 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2995 | .report = xfrm_send_report, |
5c79de6e | 2996 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2997 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2998 | }; |
2999 | ||
a6483b79 | 3000 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 3001 | { |
be33690d | 3002 | struct sock *nlsk; |
a31f2d17 PNA |
3003 | struct netlink_kernel_cfg cfg = { |
3004 | .groups = XFRMNLGRP_MAX, | |
3005 | .input = xfrm_netlink_rcv, | |
3006 | }; | |
be33690d | 3007 | |
9f00d977 | 3008 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); |
be33690d | 3009 | if (nlsk == NULL) |
1da177e4 | 3010 | return -ENOMEM; |
d79d792e | 3011 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 3012 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
3013 | return 0; |
3014 | } | |
3015 | ||
d79d792e | 3016 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 3017 | { |
d79d792e EB |
3018 | struct net *net; |
3019 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 3020 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
3021 | synchronize_net(); |
3022 | list_for_each_entry(net, net_exit_list, exit_list) | |
3023 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
3024 | } |
3025 | ||
a6483b79 | 3026 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
3027 | .init = xfrm_user_net_init, |
3028 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
3029 | }; |
3030 | ||
3031 | static int __init xfrm_user_init(void) | |
3032 | { | |
3033 | int rv; | |
3034 | ||
3035 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
3036 | ||
3037 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3038 | if (rv < 0) | |
3039 | return rv; | |
3040 | rv = xfrm_register_km(&netlink_mgr); | |
3041 | if (rv < 0) | |
3042 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3043 | return rv; | |
3044 | } | |
3045 | ||
3046 | static void __exit xfrm_user_exit(void) | |
3047 | { | |
3048 | xfrm_unregister_km(&netlink_mgr); | |
3049 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3050 | } | |
3051 | ||
1da177e4 LT |
3052 | module_init(xfrm_user_init); |
3053 | module_exit(xfrm_user_exit); | |
3054 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3055 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3056 |