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 | |
e33d4f13 | 34 | #include <asm/unaligned.h> |
1da177e4 | 35 | |
5424f32e | 36 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 37 | { |
5424f32e | 38 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
39 | struct xfrm_algo *algp; |
40 | ||
41 | if (!rt) | |
42 | return 0; | |
43 | ||
5424f32e | 44 | algp = nla_data(rt); |
0f99be0d | 45 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
46 | return -EINVAL; |
47 | ||
1da177e4 LT |
48 | switch (type) { |
49 | case XFRMA_ALG_AUTH: | |
1da177e4 | 50 | case XFRMA_ALG_CRYPT: |
1da177e4 | 51 | case XFRMA_ALG_COMP: |
1da177e4 LT |
52 | break; |
53 | ||
54 | default: | |
55 | return -EINVAL; | |
3ff50b79 | 56 | } |
1da177e4 LT |
57 | |
58 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
59 | return 0; | |
60 | } | |
61 | ||
4447bb33 MW |
62 | static int verify_auth_trunc(struct nlattr **attrs) |
63 | { | |
64 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; | |
65 | struct xfrm_algo_auth *algp; | |
66 | ||
67 | if (!rt) | |
68 | return 0; | |
69 | ||
70 | algp = nla_data(rt); | |
71 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) | |
72 | return -EINVAL; | |
73 | ||
74 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
75 | return 0; | |
76 | } | |
77 | ||
1a6509d9 HX |
78 | static int verify_aead(struct nlattr **attrs) |
79 | { | |
80 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
81 | struct xfrm_algo_aead *algp; | |
82 | ||
83 | if (!rt) | |
84 | return 0; | |
85 | ||
86 | algp = nla_data(rt); | |
87 | if (nla_len(rt) < aead_len(algp)) | |
88 | return -EINVAL; | |
89 | ||
90 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
91 | return 0; | |
92 | } | |
93 | ||
5424f32e | 94 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
95 | xfrm_address_t **addrp) |
96 | { | |
5424f32e | 97 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 98 | |
cf5cb79f | 99 | if (rt && addrp) |
5424f32e | 100 | *addrp = nla_data(rt); |
eb2971b6 | 101 | } |
df71837d | 102 | |
5424f32e | 103 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 104 | { |
5424f32e | 105 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 106 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
107 | |
108 | if (!rt) | |
109 | return 0; | |
110 | ||
5424f32e | 111 | uctx = nla_data(rt); |
cf5cb79f | 112 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
113 | return -EINVAL; |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
d8647b79 SK |
118 | static inline int verify_replay(struct xfrm_usersa_info *p, |
119 | struct nlattr **attrs) | |
120 | { | |
121 | struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; | |
ecd79187 | 122 | struct xfrm_replay_state_esn *rs; |
d8647b79 | 123 | |
ecd79187 MK |
124 | if (p->flags & XFRM_STATE_ESN) { |
125 | if (!rt) | |
126 | return -EINVAL; | |
127 | ||
128 | rs = nla_data(rt); | |
129 | ||
130 | if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) | |
131 | return -EINVAL; | |
132 | ||
133 | if (nla_len(rt) < xfrm_replay_state_esn_len(rs) && | |
134 | nla_len(rt) != sizeof(*rs)) | |
135 | return -EINVAL; | |
136 | } | |
7833aa05 | 137 | |
d8647b79 SK |
138 | if (!rt) |
139 | return 0; | |
140 | ||
01714109 FD |
141 | /* As only ESP and AH support ESN feature. */ |
142 | if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) | |
02aadf72 SK |
143 | return -EINVAL; |
144 | ||
d8647b79 SK |
145 | if (p->replay_window != 0) |
146 | return -EINVAL; | |
147 | ||
148 | return 0; | |
149 | } | |
df71837d | 150 | |
1da177e4 | 151 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 152 | struct nlattr **attrs) |
1da177e4 LT |
153 | { |
154 | int err; | |
155 | ||
156 | err = -EINVAL; | |
157 | switch (p->family) { | |
158 | case AF_INET: | |
159 | break; | |
160 | ||
161 | case AF_INET6: | |
dfd56b8b | 162 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
163 | break; |
164 | #else | |
165 | err = -EAFNOSUPPORT; | |
166 | goto out; | |
167 | #endif | |
168 | ||
169 | default: | |
170 | goto out; | |
3ff50b79 | 171 | } |
1da177e4 LT |
172 | |
173 | err = -EINVAL; | |
174 | switch (p->id.proto) { | |
175 | case IPPROTO_AH: | |
4447bb33 MW |
176 | if ((!attrs[XFRMA_ALG_AUTH] && |
177 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 178 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 179 | attrs[XFRMA_ALG_CRYPT] || |
35d2856b | 180 | attrs[XFRMA_ALG_COMP] || |
a0e5ef53 | 181 | attrs[XFRMA_TFCPAD]) |
1da177e4 LT |
182 | goto out; |
183 | break; | |
184 | ||
185 | case IPPROTO_ESP: | |
1a6509d9 HX |
186 | if (attrs[XFRMA_ALG_COMP]) |
187 | goto out; | |
188 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 189 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
190 | !attrs[XFRMA_ALG_CRYPT] && |
191 | !attrs[XFRMA_ALG_AEAD]) | |
192 | goto out; | |
193 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 194 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
195 | attrs[XFRMA_ALG_CRYPT]) && |
196 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 | 197 | goto out; |
35d2856b MW |
198 | if (attrs[XFRMA_TFCPAD] && |
199 | p->mode != XFRM_MODE_TUNNEL) | |
200 | goto out; | |
1da177e4 LT |
201 | break; |
202 | ||
203 | case IPPROTO_COMP: | |
35a7aa08 | 204 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 205 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 206 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 207 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35d2856b | 208 | attrs[XFRMA_ALG_CRYPT] || |
a0e5ef53 TB |
209 | attrs[XFRMA_TFCPAD] || |
210 | (ntohl(p->id.spi) >= 0x10000)) | |
1da177e4 LT |
211 | goto out; |
212 | break; | |
213 | ||
dfd56b8b | 214 | #if IS_ENABLED(CONFIG_IPV6) |
e23c7194 MN |
215 | case IPPROTO_DSTOPTS: |
216 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
217 | if (attrs[XFRMA_ALG_COMP] || |
218 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 219 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 220 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
221 | attrs[XFRMA_ALG_CRYPT] || |
222 | attrs[XFRMA_ENCAP] || | |
223 | attrs[XFRMA_SEC_CTX] || | |
35d2856b | 224 | attrs[XFRMA_TFCPAD] || |
35a7aa08 | 225 | !attrs[XFRMA_COADDR]) |
e23c7194 MN |
226 | goto out; |
227 | break; | |
228 | #endif | |
229 | ||
1da177e4 LT |
230 | default: |
231 | goto out; | |
3ff50b79 | 232 | } |
1da177e4 | 233 | |
1a6509d9 HX |
234 | if ((err = verify_aead(attrs))) |
235 | goto out; | |
4447bb33 MW |
236 | if ((err = verify_auth_trunc(attrs))) |
237 | goto out; | |
35a7aa08 | 238 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 239 | goto out; |
35a7aa08 | 240 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 241 | goto out; |
35a7aa08 | 242 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 243 | goto out; |
35a7aa08 | 244 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 245 | goto out; |
d8647b79 SK |
246 | if ((err = verify_replay(p, attrs))) |
247 | goto out; | |
1da177e4 LT |
248 | |
249 | err = -EINVAL; | |
250 | switch (p->mode) { | |
7e49e6de MN |
251 | case XFRM_MODE_TRANSPORT: |
252 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 253 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 254 | case XFRM_MODE_BEET: |
1da177e4 LT |
255 | break; |
256 | ||
257 | default: | |
258 | goto out; | |
3ff50b79 | 259 | } |
1da177e4 LT |
260 | |
261 | err = 0; | |
262 | ||
263 | out: | |
264 | return err; | |
265 | } | |
266 | ||
267 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
6f2f19ed | 268 | struct xfrm_algo_desc *(*get_byname)(const char *, int), |
5424f32e | 269 | struct nlattr *rta) |
1da177e4 | 270 | { |
1da177e4 LT |
271 | struct xfrm_algo *p, *ualg; |
272 | struct xfrm_algo_desc *algo; | |
273 | ||
274 | if (!rta) | |
275 | return 0; | |
276 | ||
5424f32e | 277 | ualg = nla_data(rta); |
1da177e4 LT |
278 | |
279 | algo = get_byname(ualg->alg_name, 1); | |
280 | if (!algo) | |
281 | return -ENOSYS; | |
282 | *props = algo->desc.sadb_alg_id; | |
283 | ||
0f99be0d | 284 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
285 | if (!p) |
286 | return -ENOMEM; | |
287 | ||
04ff1260 | 288 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
289 | *algpp = p; |
290 | return 0; | |
291 | } | |
292 | ||
69b0137f HX |
293 | static int attach_crypt(struct xfrm_state *x, struct nlattr *rta) |
294 | { | |
295 | struct xfrm_algo *p, *ualg; | |
296 | struct xfrm_algo_desc *algo; | |
297 | ||
298 | if (!rta) | |
299 | return 0; | |
300 | ||
301 | ualg = nla_data(rta); | |
302 | ||
303 | algo = xfrm_ealg_get_byname(ualg->alg_name, 1); | |
304 | if (!algo) | |
305 | return -ENOSYS; | |
306 | x->props.ealgo = algo->desc.sadb_alg_id; | |
307 | ||
308 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); | |
309 | if (!p) | |
310 | return -ENOMEM; | |
311 | ||
312 | strcpy(p->alg_name, algo->name); | |
313 | x->ealg = p; | |
314 | x->geniv = algo->uinfo.encr.geniv; | |
315 | return 0; | |
316 | } | |
317 | ||
4447bb33 MW |
318 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
319 | struct nlattr *rta) | |
320 | { | |
321 | struct xfrm_algo *ualg; | |
322 | struct xfrm_algo_auth *p; | |
323 | struct xfrm_algo_desc *algo; | |
324 | ||
325 | if (!rta) | |
326 | return 0; | |
327 | ||
328 | ualg = nla_data(rta); | |
329 | ||
330 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
331 | if (!algo) | |
332 | return -ENOSYS; | |
333 | *props = algo->desc.sadb_alg_id; | |
334 | ||
335 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
336 | if (!p) | |
337 | return -ENOMEM; | |
338 | ||
339 | strcpy(p->alg_name, algo->name); | |
340 | p->alg_key_len = ualg->alg_key_len; | |
341 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
342 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
343 | ||
344 | *algpp = p; | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
349 | struct nlattr *rta) | |
350 | { | |
351 | struct xfrm_algo_auth *p, *ualg; | |
352 | struct xfrm_algo_desc *algo; | |
353 | ||
354 | if (!rta) | |
355 | return 0; | |
356 | ||
357 | ualg = nla_data(rta); | |
358 | ||
359 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
360 | if (!algo) | |
361 | return -ENOSYS; | |
689f1c9d | 362 | if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) |
4447bb33 MW |
363 | return -EINVAL; |
364 | *props = algo->desc.sadb_alg_id; | |
365 | ||
366 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
367 | if (!p) | |
368 | return -ENOMEM; | |
369 | ||
370 | strcpy(p->alg_name, algo->name); | |
371 | if (!p->alg_trunc_len) | |
372 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
373 | ||
374 | *algpp = p; | |
375 | return 0; | |
376 | } | |
377 | ||
69b0137f | 378 | static int attach_aead(struct xfrm_state *x, struct nlattr *rta) |
1a6509d9 HX |
379 | { |
380 | struct xfrm_algo_aead *p, *ualg; | |
381 | struct xfrm_algo_desc *algo; | |
382 | ||
383 | if (!rta) | |
384 | return 0; | |
385 | ||
386 | ualg = nla_data(rta); | |
387 | ||
388 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
389 | if (!algo) | |
390 | return -ENOSYS; | |
69b0137f | 391 | x->props.ealgo = algo->desc.sadb_alg_id; |
1a6509d9 HX |
392 | |
393 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
394 | if (!p) | |
395 | return -ENOMEM; | |
396 | ||
397 | strcpy(p->alg_name, algo->name); | |
69b0137f HX |
398 | x->aead = p; |
399 | x->geniv = algo->uinfo.aead.geniv; | |
1a6509d9 HX |
400 | return 0; |
401 | } | |
402 | ||
e2b19125 SK |
403 | static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, |
404 | struct nlattr *rp) | |
405 | { | |
406 | struct xfrm_replay_state_esn *up; | |
ecd79187 | 407 | int ulen; |
e2b19125 SK |
408 | |
409 | if (!replay_esn || !rp) | |
410 | return 0; | |
411 | ||
412 | up = nla_data(rp); | |
ecd79187 | 413 | ulen = xfrm_replay_state_esn_len(up); |
e2b19125 | 414 | |
ecd79187 | 415 | if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen) |
e2b19125 SK |
416 | return -EINVAL; |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
d8647b79 SK |
421 | static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, |
422 | struct xfrm_replay_state_esn **preplay_esn, | |
423 | struct nlattr *rta) | |
424 | { | |
425 | struct xfrm_replay_state_esn *p, *pp, *up; | |
ecd79187 | 426 | int klen, ulen; |
d8647b79 SK |
427 | |
428 | if (!rta) | |
429 | return 0; | |
430 | ||
431 | up = nla_data(rta); | |
ecd79187 MK |
432 | klen = xfrm_replay_state_esn_len(up); |
433 | ulen = nla_len(rta) >= klen ? klen : sizeof(*up); | |
d8647b79 | 434 | |
ecd79187 | 435 | p = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
436 | if (!p) |
437 | return -ENOMEM; | |
438 | ||
ecd79187 | 439 | pp = kzalloc(klen, GFP_KERNEL); |
d8647b79 SK |
440 | if (!pp) { |
441 | kfree(p); | |
442 | return -ENOMEM; | |
443 | } | |
444 | ||
ecd79187 MK |
445 | memcpy(p, up, ulen); |
446 | memcpy(pp, up, ulen); | |
447 | ||
d8647b79 SK |
448 | *replay_esn = p; |
449 | *preplay_esn = pp; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
661697f7 | 454 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 455 | { |
df71837d TJ |
456 | int len = 0; |
457 | ||
458 | if (xfrm_ctx) { | |
459 | len += sizeof(struct xfrm_user_sec_ctx); | |
460 | len += xfrm_ctx->ctx_len; | |
461 | } | |
462 | return len; | |
463 | } | |
464 | ||
1da177e4 LT |
465 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
466 | { | |
467 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
468 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
469 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
470 | x->props.mode = p->mode; | |
33fce60d FD |
471 | x->props.replay_window = min_t(unsigned int, p->replay_window, |
472 | sizeof(x->replay.bitmap) * 8); | |
1da177e4 LT |
473 | x->props.reqid = p->reqid; |
474 | x->props.family = p->family; | |
54489c14 | 475 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 476 | x->props.flags = p->flags; |
196b0036 | 477 | |
ccf9b3b8 | 478 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 479 | x->sel.family = p->family; |
1da177e4 LT |
480 | } |
481 | ||
d51d081d JHS |
482 | /* |
483 | * someday when pfkey also has support, we could have the code | |
484 | * somehow made shareable and move it to xfrm_state.c - JHS | |
485 | * | |
486 | */ | |
e3ac104d MK |
487 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, |
488 | int update_esn) | |
d51d081d | 489 | { |
5424f32e | 490 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
e3ac104d | 491 | struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; |
5424f32e TG |
492 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
493 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
494 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 495 | |
d8647b79 SK |
496 | if (re) { |
497 | struct xfrm_replay_state_esn *replay_esn; | |
498 | replay_esn = nla_data(re); | |
499 | memcpy(x->replay_esn, replay_esn, | |
500 | xfrm_replay_state_esn_len(replay_esn)); | |
501 | memcpy(x->preplay_esn, replay_esn, | |
502 | xfrm_replay_state_esn_len(replay_esn)); | |
503 | } | |
504 | ||
d51d081d JHS |
505 | if (rp) { |
506 | struct xfrm_replay_state *replay; | |
5424f32e | 507 | replay = nla_data(rp); |
d51d081d JHS |
508 | memcpy(&x->replay, replay, sizeof(*replay)); |
509 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
510 | } | |
511 | ||
512 | if (lt) { | |
513 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 514 | ltime = nla_data(lt); |
d51d081d JHS |
515 | x->curlft.bytes = ltime->bytes; |
516 | x->curlft.packets = ltime->packets; | |
517 | x->curlft.add_time = ltime->add_time; | |
518 | x->curlft.use_time = ltime->use_time; | |
519 | } | |
520 | ||
cf5cb79f | 521 | if (et) |
5424f32e | 522 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 523 | |
cf5cb79f | 524 | if (rt) |
5424f32e | 525 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
526 | } |
527 | ||
fc34acd3 AD |
528 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
529 | struct xfrm_usersa_info *p, | |
5424f32e | 530 | struct nlattr **attrs, |
1da177e4 LT |
531 | int *errp) |
532 | { | |
fc34acd3 | 533 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
534 | int err = -ENOMEM; |
535 | ||
536 | if (!x) | |
537 | goto error_no_put; | |
538 | ||
539 | copy_from_user_state(x, p); | |
540 | ||
a947b0a9 ND |
541 | if (attrs[XFRMA_SA_EXTRA_FLAGS]) |
542 | x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); | |
543 | ||
69b0137f | 544 | if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD]))) |
1a6509d9 | 545 | goto error; |
4447bb33 MW |
546 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
547 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 548 | goto error; |
4447bb33 MW |
549 | if (!x->props.aalgo) { |
550 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
551 | attrs[XFRMA_ALG_AUTH]))) | |
552 | goto error; | |
553 | } | |
69b0137f | 554 | if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
555 | goto error; |
556 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
557 | xfrm_calg_get_byname, | |
35a7aa08 | 558 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 559 | goto error; |
fd21150a TG |
560 | |
561 | if (attrs[XFRMA_ENCAP]) { | |
562 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
563 | sizeof(*x->encap), GFP_KERNEL); | |
564 | if (x->encap == NULL) | |
565 | goto error; | |
566 | } | |
567 | ||
35d2856b MW |
568 | if (attrs[XFRMA_TFCPAD]) |
569 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); | |
570 | ||
fd21150a TG |
571 | if (attrs[XFRMA_COADDR]) { |
572 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
573 | sizeof(*x->coaddr), GFP_KERNEL); | |
574 | if (x->coaddr == NULL) | |
575 | goto error; | |
576 | } | |
577 | ||
6f26b61e JHS |
578 | xfrm_mark_get(attrs, &x->mark); |
579 | ||
a454f0cc | 580 | err = __xfrm_init_state(x, false); |
1da177e4 LT |
581 | if (err) |
582 | goto error; | |
583 | ||
fd21150a TG |
584 | if (attrs[XFRMA_SEC_CTX] && |
585 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
586 | goto error; |
587 | ||
d8647b79 SK |
588 | if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, |
589 | attrs[XFRMA_REPLAY_ESN_VAL]))) | |
590 | goto error; | |
591 | ||
1da177e4 | 592 | x->km.seq = p->seq; |
b27aeadb | 593 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 594 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 595 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d | 596 | |
9fdc4883 SK |
597 | if ((err = xfrm_init_replay(x))) |
598 | goto error; | |
d51d081d | 599 | |
9fdc4883 | 600 | /* override default values from above */ |
e3ac104d | 601 | xfrm_update_ae_params(x, attrs, 0); |
1da177e4 LT |
602 | |
603 | return x; | |
604 | ||
605 | error: | |
606 | x->km.state = XFRM_STATE_DEAD; | |
607 | xfrm_state_put(x); | |
608 | error_no_put: | |
609 | *errp = err; | |
610 | return NULL; | |
611 | } | |
612 | ||
22e70050 | 613 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 614 | struct nlattr **attrs) |
1da177e4 | 615 | { |
fc34acd3 | 616 | struct net *net = sock_net(skb->sk); |
7b67c857 | 617 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
618 | struct xfrm_state *x; |
619 | int err; | |
26b15dad | 620 | struct km_event c; |
1da177e4 | 621 | |
35a7aa08 | 622 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
623 | if (err) |
624 | return err; | |
625 | ||
fc34acd3 | 626 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
627 | if (!x) |
628 | return err; | |
629 | ||
26b15dad | 630 | xfrm_state_hold(x); |
1da177e4 LT |
631 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
632 | err = xfrm_state_add(x); | |
633 | else | |
634 | err = xfrm_state_update(x); | |
635 | ||
2e71029e | 636 | xfrm_audit_state_add(x, err ? 0 : 1, true); |
161a09e7 | 637 | |
1da177e4 LT |
638 | if (err < 0) { |
639 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 640 | __xfrm_state_put(x); |
7d6dfe1f | 641 | goto out; |
1da177e4 LT |
642 | } |
643 | ||
26b15dad | 644 | c.seq = nlh->nlmsg_seq; |
15e47304 | 645 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 646 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
647 | |
648 | km_state_notify(x, &c); | |
7d6dfe1f | 649 | out: |
26b15dad | 650 | xfrm_state_put(x); |
1da177e4 LT |
651 | return err; |
652 | } | |
653 | ||
fc34acd3 AD |
654 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
655 | struct xfrm_usersa_id *p, | |
5424f32e | 656 | struct nlattr **attrs, |
eb2971b6 MN |
657 | int *errp) |
658 | { | |
659 | struct xfrm_state *x = NULL; | |
6f26b61e | 660 | struct xfrm_mark m; |
eb2971b6 | 661 | int err; |
6f26b61e | 662 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
663 | |
664 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
665 | err = -ESRCH; | |
6f26b61e | 666 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
667 | } else { |
668 | xfrm_address_t *saddr = NULL; | |
669 | ||
35a7aa08 | 670 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
671 | if (!saddr) { |
672 | err = -EINVAL; | |
673 | goto out; | |
674 | } | |
675 | ||
9abbffee | 676 | err = -ESRCH; |
6f26b61e JHS |
677 | x = xfrm_state_lookup_byaddr(net, mark, |
678 | &p->daddr, saddr, | |
221df1ed | 679 | p->proto, p->family); |
eb2971b6 MN |
680 | } |
681 | ||
682 | out: | |
683 | if (!x && errp) | |
684 | *errp = err; | |
685 | return x; | |
686 | } | |
687 | ||
22e70050 | 688 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 689 | struct nlattr **attrs) |
1da177e4 | 690 | { |
fc34acd3 | 691 | struct net *net = sock_net(skb->sk); |
1da177e4 | 692 | struct xfrm_state *x; |
eb2971b6 | 693 | int err = -ESRCH; |
26b15dad | 694 | struct km_event c; |
7b67c857 | 695 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 | 696 | |
fc34acd3 | 697 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 698 | if (x == NULL) |
eb2971b6 | 699 | return err; |
1da177e4 | 700 | |
6f68dc37 | 701 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
702 | goto out; |
703 | ||
1da177e4 | 704 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
705 | err = -EPERM; |
706 | goto out; | |
1da177e4 LT |
707 | } |
708 | ||
26b15dad | 709 | err = xfrm_state_delete(x); |
161a09e7 | 710 | |
c8c05a8e CZ |
711 | if (err < 0) |
712 | goto out; | |
26b15dad JHS |
713 | |
714 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 715 | c.portid = nlh->nlmsg_pid; |
f60f6b8f | 716 | c.event = nlh->nlmsg_type; |
26b15dad | 717 | km_state_notify(x, &c); |
1da177e4 | 718 | |
c8c05a8e | 719 | out: |
2e71029e | 720 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
c8c05a8e | 721 | xfrm_state_put(x); |
26b15dad | 722 | return err; |
1da177e4 LT |
723 | } |
724 | ||
725 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
726 | { | |
f778a636 | 727 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
728 | memcpy(&p->id, &x->id, sizeof(p->id)); |
729 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
730 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
731 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
e33d4f13 SV |
732 | put_unaligned(x->stats.replay_window, &p->stats.replay_window); |
733 | put_unaligned(x->stats.replay, &p->stats.replay); | |
734 | put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed); | |
54489c14 | 735 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
736 | p->mode = x->props.mode; |
737 | p->replay_window = x->props.replay_window; | |
738 | p->reqid = x->props.reqid; | |
739 | p->family = x->props.family; | |
740 | p->flags = x->props.flags; | |
741 | p->seq = x->km.seq; | |
742 | } | |
743 | ||
744 | struct xfrm_dump_info { | |
745 | struct sk_buff *in_skb; | |
746 | struct sk_buff *out_skb; | |
747 | u32 nlmsg_seq; | |
748 | u16 nlmsg_flags; | |
1da177e4 LT |
749 | }; |
750 | ||
c0144bea TG |
751 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
752 | { | |
c0144bea TG |
753 | struct xfrm_user_sec_ctx *uctx; |
754 | struct nlattr *attr; | |
68325d3b | 755 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
756 | |
757 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
758 | if (attr == NULL) | |
759 | return -EMSGSIZE; | |
760 | ||
761 | uctx = nla_data(attr); | |
762 | uctx->exttype = XFRMA_SEC_CTX; | |
763 | uctx->len = ctx_size; | |
764 | uctx->ctx_doi = s->ctx_doi; | |
765 | uctx->ctx_alg = s->ctx_alg; | |
766 | uctx->ctx_len = s->ctx_len; | |
767 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
4447bb33 MW |
772 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
773 | { | |
774 | struct xfrm_algo *algo; | |
775 | struct nlattr *nla; | |
776 | ||
777 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
778 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
779 | if (!nla) | |
780 | return -EMSGSIZE; | |
781 | ||
782 | algo = nla_data(nla); | |
4c87308b | 783 | strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); |
4447bb33 MW |
784 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
785 | algo->alg_key_len = auth->alg_key_len; | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
68325d3b HX |
790 | /* Don't change this without updating xfrm_sa_len! */ |
791 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
792 | struct xfrm_usersa_info *p, | |
793 | struct sk_buff *skb) | |
1da177e4 | 794 | { |
1d1e34dd | 795 | int ret = 0; |
d0fde795 | 796 | |
1d1e34dd | 797 | copy_to_user_state(x, p); |
68325d3b | 798 | |
a947b0a9 ND |
799 | if (x->props.extra_flags) { |
800 | ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, | |
801 | x->props.extra_flags); | |
802 | if (ret) | |
803 | goto out; | |
804 | } | |
805 | ||
1d1e34dd DM |
806 | if (x->coaddr) { |
807 | ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
808 | if (ret) | |
809 | goto out; | |
810 | } | |
811 | if (x->lastused) { | |
de95c4a4 ND |
812 | ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused, |
813 | XFRMA_PAD); | |
1d1e34dd DM |
814 | if (ret) |
815 | goto out; | |
816 | } | |
817 | if (x->aead) { | |
818 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
819 | if (ret) | |
820 | goto out; | |
821 | } | |
822 | if (x->aalg) { | |
823 | ret = copy_to_user_auth(x->aalg, skb); | |
824 | if (!ret) | |
825 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
826 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
827 | if (ret) | |
828 | goto out; | |
829 | } | |
830 | if (x->ealg) { | |
831 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); | |
832 | if (ret) | |
833 | goto out; | |
834 | } | |
835 | if (x->calg) { | |
836 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
837 | if (ret) | |
838 | goto out; | |
839 | } | |
840 | if (x->encap) { | |
841 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
842 | if (ret) | |
843 | goto out; | |
844 | } | |
845 | if (x->tfcpad) { | |
846 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); | |
847 | if (ret) | |
848 | goto out; | |
849 | } | |
850 | ret = xfrm_mark_put(skb, &x->mark); | |
851 | if (ret) | |
852 | goto out; | |
f293a5e3 | 853 | if (x->replay_esn) |
1d1e34dd DM |
854 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
855 | xfrm_replay_state_esn_len(x->replay_esn), | |
856 | x->replay_esn); | |
f293a5e3 | 857 | else |
858 | ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), | |
859 | &x->replay); | |
860 | if (ret) | |
861 | goto out; | |
1d1e34dd DM |
862 | if (x->security) |
863 | ret = copy_sec_ctx(x->security, skb); | |
864 | out: | |
865 | return ret; | |
68325d3b HX |
866 | } |
867 | ||
868 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
869 | { | |
870 | struct xfrm_dump_info *sp = ptr; | |
871 | struct sk_buff *in_skb = sp->in_skb; | |
872 | struct sk_buff *skb = sp->out_skb; | |
873 | struct xfrm_usersa_info *p; | |
874 | struct nlmsghdr *nlh; | |
875 | int err; | |
876 | ||
15e47304 | 877 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
68325d3b HX |
878 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
879 | if (nlh == NULL) | |
880 | return -EMSGSIZE; | |
881 | ||
882 | p = nlmsg_data(nlh); | |
883 | ||
884 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
885 | if (err) { |
886 | nlmsg_cancel(skb, nlh); | |
887 | return err; | |
888 | } | |
9825069d | 889 | nlmsg_end(skb, nlh); |
1da177e4 | 890 | return 0; |
1da177e4 LT |
891 | } |
892 | ||
4c563f76 TT |
893 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
894 | { | |
895 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
283bc9f3 FD |
896 | struct sock *sk = cb->skb->sk; |
897 | struct net *net = sock_net(sk); | |
898 | ||
899 | xfrm_state_walk_done(walk, net); | |
4c563f76 TT |
900 | return 0; |
901 | } | |
902 | ||
d3623099 | 903 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
1da177e4 LT |
904 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
905 | { | |
fc34acd3 | 906 | struct net *net = sock_net(skb->sk); |
4c563f76 | 907 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
908 | struct xfrm_dump_info info; |
909 | ||
4c563f76 TT |
910 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
911 | sizeof(cb->args) - sizeof(cb->args[0])); | |
912 | ||
1da177e4 LT |
913 | info.in_skb = cb->skb; |
914 | info.out_skb = skb; | |
915 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
916 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
917 | |
918 | if (!cb->args[0]) { | |
d3623099 | 919 | struct nlattr *attrs[XFRMA_MAX+1]; |
870a2df4 | 920 | struct xfrm_address_filter *filter = NULL; |
d3623099 ND |
921 | u8 proto = 0; |
922 | int err; | |
923 | ||
4c563f76 | 924 | cb->args[0] = 1; |
d3623099 ND |
925 | |
926 | err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, | |
927 | xfrma_policy); | |
928 | if (err < 0) | |
929 | return err; | |
930 | ||
870a2df4 | 931 | if (attrs[XFRMA_ADDRESS_FILTER]) { |
df367561 AH |
932 | filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), |
933 | sizeof(*filter), GFP_KERNEL); | |
d3623099 ND |
934 | if (filter == NULL) |
935 | return -ENOMEM; | |
d3623099 ND |
936 | } |
937 | ||
938 | if (attrs[XFRMA_PROTO]) | |
939 | proto = nla_get_u8(attrs[XFRMA_PROTO]); | |
940 | ||
941 | xfrm_state_walk_init(walk, proto, filter); | |
4c563f76 TT |
942 | } |
943 | ||
fc34acd3 | 944 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
945 | |
946 | return skb->len; | |
947 | } | |
948 | ||
949 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
950 | struct xfrm_state *x, u32 seq) | |
951 | { | |
952 | struct xfrm_dump_info info; | |
953 | struct sk_buff *skb; | |
864745d2 | 954 | int err; |
1da177e4 | 955 | |
7deb2264 | 956 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
957 | if (!skb) |
958 | return ERR_PTR(-ENOMEM); | |
959 | ||
1da177e4 LT |
960 | info.in_skb = in_skb; |
961 | info.out_skb = skb; | |
962 | info.nlmsg_seq = seq; | |
963 | info.nlmsg_flags = 0; | |
1da177e4 | 964 | |
864745d2 MK |
965 | err = dump_one_state(x, 0, &info); |
966 | if (err) { | |
1da177e4 | 967 | kfree_skb(skb); |
864745d2 | 968 | return ERR_PTR(err); |
1da177e4 LT |
969 | } |
970 | ||
971 | return skb; | |
972 | } | |
973 | ||
21ee543e MK |
974 | /* A wrapper for nlmsg_multicast() checking that nlsk is still available. |
975 | * Must be called with RCU read lock. | |
976 | */ | |
977 | static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, | |
978 | u32 pid, unsigned int group) | |
979 | { | |
980 | struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); | |
981 | ||
982 | if (nlsk) | |
983 | return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); | |
984 | else | |
985 | return -1; | |
986 | } | |
987 | ||
7deb2264 TG |
988 | static inline size_t xfrm_spdinfo_msgsize(void) |
989 | { | |
990 | return NLMSG_ALIGN(4) | |
991 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
880a6fab CG |
992 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)) |
993 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)) | |
994 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)); | |
7deb2264 TG |
995 | } |
996 | ||
e071041b | 997 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 998 | u32 portid, u32 seq, u32 flags) |
ecfd6b18 | 999 | { |
5a6d3416 JHS |
1000 | struct xfrmk_spdinfo si; |
1001 | struct xfrmu_spdinfo spc; | |
1002 | struct xfrmu_spdhinfo sph; | |
880a6fab | 1003 | struct xfrmu_spdhthresh spt4, spt6; |
ecfd6b18 | 1004 | struct nlmsghdr *nlh; |
1d1e34dd | 1005 | int err; |
ecfd6b18 | 1006 | u32 *f; |
880a6fab | 1007 | unsigned lseq; |
ecfd6b18 | 1008 | |
15e47304 | 1009 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
25985edc | 1010 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
1011 | return -EMSGSIZE; |
1012 | ||
1013 | f = nlmsg_data(nlh); | |
1014 | *f = flags; | |
e071041b | 1015 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
1016 | spc.incnt = si.incnt; |
1017 | spc.outcnt = si.outcnt; | |
1018 | spc.fwdcnt = si.fwdcnt; | |
1019 | spc.inscnt = si.inscnt; | |
1020 | spc.outscnt = si.outscnt; | |
1021 | spc.fwdscnt = si.fwdscnt; | |
1022 | sph.spdhcnt = si.spdhcnt; | |
1023 | sph.spdhmcnt = si.spdhmcnt; | |
1024 | ||
880a6fab CG |
1025 | do { |
1026 | lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); | |
1027 | ||
1028 | spt4.lbits = net->xfrm.policy_hthresh.lbits4; | |
1029 | spt4.rbits = net->xfrm.policy_hthresh.rbits4; | |
1030 | spt6.lbits = net->xfrm.policy_hthresh.lbits6; | |
1031 | spt6.rbits = net->xfrm.policy_hthresh.rbits6; | |
1032 | } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); | |
1033 | ||
1d1e34dd DM |
1034 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
1035 | if (!err) | |
1036 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
880a6fab CG |
1037 | if (!err) |
1038 | err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); | |
1039 | if (!err) | |
1040 | err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); | |
1d1e34dd DM |
1041 | if (err) { |
1042 | nlmsg_cancel(skb, nlh); | |
1043 | return err; | |
1044 | } | |
ecfd6b18 | 1045 | |
053c095a JB |
1046 | nlmsg_end(skb, nlh); |
1047 | return 0; | |
ecfd6b18 JHS |
1048 | } |
1049 | ||
880a6fab CG |
1050 | static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
1051 | struct nlattr **attrs) | |
1052 | { | |
1053 | struct net *net = sock_net(skb->sk); | |
1054 | struct xfrmu_spdhthresh *thresh4 = NULL; | |
1055 | struct xfrmu_spdhthresh *thresh6 = NULL; | |
1056 | ||
1057 | /* selector prefixlen thresholds to hash policies */ | |
1058 | if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { | |
1059 | struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; | |
1060 | ||
1061 | if (nla_len(rta) < sizeof(*thresh4)) | |
1062 | return -EINVAL; | |
1063 | thresh4 = nla_data(rta); | |
1064 | if (thresh4->lbits > 32 || thresh4->rbits > 32) | |
1065 | return -EINVAL; | |
1066 | } | |
1067 | if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { | |
1068 | struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; | |
1069 | ||
1070 | if (nla_len(rta) < sizeof(*thresh6)) | |
1071 | return -EINVAL; | |
1072 | thresh6 = nla_data(rta); | |
1073 | if (thresh6->lbits > 128 || thresh6->rbits > 128) | |
1074 | return -EINVAL; | |
1075 | } | |
1076 | ||
1077 | if (thresh4 || thresh6) { | |
1078 | write_seqlock(&net->xfrm.policy_hthresh.lock); | |
1079 | if (thresh4) { | |
1080 | net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; | |
1081 | net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; | |
1082 | } | |
1083 | if (thresh6) { | |
1084 | net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; | |
1085 | net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; | |
1086 | } | |
1087 | write_sequnlock(&net->xfrm.policy_hthresh.lock); | |
1088 | ||
1089 | xfrm_policy_hash_rebuild(net); | |
1090 | } | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | ||
ecfd6b18 | 1095 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1096 | struct nlattr **attrs) |
ecfd6b18 | 1097 | { |
a6483b79 | 1098 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 1099 | struct sk_buff *r_skb; |
7b67c857 | 1100 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1101 | u32 sportid = NETLINK_CB(skb).portid; |
ecfd6b18 | 1102 | u32 seq = nlh->nlmsg_seq; |
ecfd6b18 | 1103 | |
7deb2264 | 1104 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
1105 | if (r_skb == NULL) |
1106 | return -ENOMEM; | |
1107 | ||
15e47304 | 1108 | if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) |
ecfd6b18 JHS |
1109 | BUG(); |
1110 | ||
15e47304 | 1111 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
ecfd6b18 JHS |
1112 | } |
1113 | ||
7deb2264 TG |
1114 | static inline size_t xfrm_sadinfo_msgsize(void) |
1115 | { | |
1116 | return NLMSG_ALIGN(4) | |
1117 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
1118 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
1119 | } | |
1120 | ||
e071041b | 1121 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 1122 | u32 portid, u32 seq, u32 flags) |
28d8909b | 1123 | { |
af11e316 JHS |
1124 | struct xfrmk_sadinfo si; |
1125 | struct xfrmu_sadhinfo sh; | |
28d8909b | 1126 | struct nlmsghdr *nlh; |
1d1e34dd | 1127 | int err; |
28d8909b JHS |
1128 | u32 *f; |
1129 | ||
15e47304 | 1130 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
25985edc | 1131 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
1132 | return -EMSGSIZE; |
1133 | ||
1134 | f = nlmsg_data(nlh); | |
1135 | *f = flags; | |
e071041b | 1136 | xfrm_sad_getinfo(net, &si); |
28d8909b | 1137 | |
af11e316 JHS |
1138 | sh.sadhmcnt = si.sadhmcnt; |
1139 | sh.sadhcnt = si.sadhcnt; | |
1140 | ||
1d1e34dd DM |
1141 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
1142 | if (!err) | |
1143 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
1144 | if (err) { | |
1145 | nlmsg_cancel(skb, nlh); | |
1146 | return err; | |
1147 | } | |
28d8909b | 1148 | |
053c095a JB |
1149 | nlmsg_end(skb, nlh); |
1150 | return 0; | |
28d8909b JHS |
1151 | } |
1152 | ||
1153 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1154 | struct nlattr **attrs) |
28d8909b | 1155 | { |
a6483b79 | 1156 | struct net *net = sock_net(skb->sk); |
28d8909b | 1157 | struct sk_buff *r_skb; |
7b67c857 | 1158 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1159 | u32 sportid = NETLINK_CB(skb).portid; |
28d8909b | 1160 | u32 seq = nlh->nlmsg_seq; |
28d8909b | 1161 | |
7deb2264 | 1162 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1163 | if (r_skb == NULL) |
1164 | return -ENOMEM; | |
1165 | ||
15e47304 | 1166 | if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) |
28d8909b JHS |
1167 | BUG(); |
1168 | ||
15e47304 | 1169 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
28d8909b JHS |
1170 | } |
1171 | ||
22e70050 | 1172 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1173 | struct nlattr **attrs) |
1da177e4 | 1174 | { |
fc34acd3 | 1175 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1176 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1177 | struct xfrm_state *x; |
1178 | struct sk_buff *resp_skb; | |
eb2971b6 | 1179 | int err = -ESRCH; |
1da177e4 | 1180 | |
fc34acd3 | 1181 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1182 | if (x == NULL) |
1183 | goto out_noput; | |
1184 | ||
1185 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1186 | if (IS_ERR(resp_skb)) { | |
1187 | err = PTR_ERR(resp_skb); | |
1188 | } else { | |
15e47304 | 1189 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1190 | } |
1191 | xfrm_state_put(x); | |
1192 | out_noput: | |
1193 | return err; | |
1194 | } | |
1195 | ||
22e70050 | 1196 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1197 | struct nlattr **attrs) |
1da177e4 | 1198 | { |
fc34acd3 | 1199 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1200 | struct xfrm_state *x; |
1201 | struct xfrm_userspi_info *p; | |
1202 | struct sk_buff *resp_skb; | |
1203 | xfrm_address_t *daddr; | |
1204 | int family; | |
1205 | int err; | |
6f26b61e JHS |
1206 | u32 mark; |
1207 | struct xfrm_mark m; | |
1da177e4 | 1208 | |
7b67c857 | 1209 | p = nlmsg_data(nlh); |
776e9dd9 | 1210 | err = verify_spi_info(p->info.id.proto, p->min, p->max); |
1da177e4 LT |
1211 | if (err) |
1212 | goto out_noput; | |
1213 | ||
1214 | family = p->info.family; | |
1215 | daddr = &p->info.id.daddr; | |
1216 | ||
1217 | x = NULL; | |
6f26b61e JHS |
1218 | |
1219 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1220 | if (p->info.seq) { |
6f26b61e | 1221 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
70e94e66 | 1222 | if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { |
1da177e4 LT |
1223 | xfrm_state_put(x); |
1224 | x = NULL; | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | if (!x) | |
6f26b61e | 1229 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1230 | p->info.id.proto, daddr, |
1231 | &p->info.saddr, 1, | |
1232 | family); | |
1233 | err = -ENOENT; | |
1234 | if (x == NULL) | |
1235 | goto out_noput; | |
1236 | ||
658b219e HX |
1237 | err = xfrm_alloc_spi(x, p->min, p->max); |
1238 | if (err) | |
1239 | goto out; | |
1da177e4 | 1240 | |
658b219e | 1241 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1242 | if (IS_ERR(resp_skb)) { |
1243 | err = PTR_ERR(resp_skb); | |
1244 | goto out; | |
1245 | } | |
1246 | ||
15e47304 | 1247 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1248 | |
1249 | out: | |
1250 | xfrm_state_put(x); | |
1251 | out_noput: | |
1252 | return err; | |
1253 | } | |
1254 | ||
b798a9ed | 1255 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1256 | { |
1257 | switch (dir) { | |
1258 | case XFRM_POLICY_IN: | |
1259 | case XFRM_POLICY_OUT: | |
1260 | case XFRM_POLICY_FWD: | |
1261 | break; | |
1262 | ||
1263 | default: | |
1264 | return -EINVAL; | |
3ff50b79 | 1265 | } |
1da177e4 LT |
1266 | |
1267 | return 0; | |
1268 | } | |
1269 | ||
b798a9ed | 1270 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1271 | { |
1272 | switch (type) { | |
1273 | case XFRM_POLICY_TYPE_MAIN: | |
1274 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1275 | case XFRM_POLICY_TYPE_SUB: | |
1276 | #endif | |
1277 | break; | |
1278 | ||
1279 | default: | |
1280 | return -EINVAL; | |
3ff50b79 | 1281 | } |
f7b6983f MN |
1282 | |
1283 | return 0; | |
1284 | } | |
1285 | ||
1da177e4 LT |
1286 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1287 | { | |
e682adf0 FD |
1288 | int ret; |
1289 | ||
1da177e4 LT |
1290 | switch (p->share) { |
1291 | case XFRM_SHARE_ANY: | |
1292 | case XFRM_SHARE_SESSION: | |
1293 | case XFRM_SHARE_USER: | |
1294 | case XFRM_SHARE_UNIQUE: | |
1295 | break; | |
1296 | ||
1297 | default: | |
1298 | return -EINVAL; | |
3ff50b79 | 1299 | } |
1da177e4 LT |
1300 | |
1301 | switch (p->action) { | |
1302 | case XFRM_POLICY_ALLOW: | |
1303 | case XFRM_POLICY_BLOCK: | |
1304 | break; | |
1305 | ||
1306 | default: | |
1307 | return -EINVAL; | |
3ff50b79 | 1308 | } |
1da177e4 LT |
1309 | |
1310 | switch (p->sel.family) { | |
1311 | case AF_INET: | |
1312 | break; | |
1313 | ||
1314 | case AF_INET6: | |
dfd56b8b | 1315 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1316 | break; |
1317 | #else | |
1318 | return -EAFNOSUPPORT; | |
1319 | #endif | |
1320 | ||
1321 | default: | |
1322 | return -EINVAL; | |
3ff50b79 | 1323 | } |
1da177e4 | 1324 | |
e682adf0 FD |
1325 | ret = verify_policy_dir(p->dir); |
1326 | if (ret) | |
1327 | return ret; | |
1328 | if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir)) | |
1329 | return -EINVAL; | |
1330 | ||
1331 | return 0; | |
1da177e4 LT |
1332 | } |
1333 | ||
5424f32e | 1334 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1335 | { |
5424f32e | 1336 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1337 | struct xfrm_user_sec_ctx *uctx; |
1338 | ||
1339 | if (!rt) | |
1340 | return 0; | |
1341 | ||
5424f32e | 1342 | uctx = nla_data(rt); |
52a4c640 | 1343 | return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); |
df71837d TJ |
1344 | } |
1345 | ||
1da177e4 LT |
1346 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1347 | int nr) | |
1348 | { | |
1349 | int i; | |
1350 | ||
1351 | xp->xfrm_nr = nr; | |
1352 | for (i = 0; i < nr; i++, ut++) { | |
1353 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1354 | ||
1355 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1356 | memcpy(&t->saddr, &ut->saddr, | |
1357 | sizeof(xfrm_address_t)); | |
1358 | t->reqid = ut->reqid; | |
1359 | t->mode = ut->mode; | |
1360 | t->share = ut->share; | |
1361 | t->optional = ut->optional; | |
1362 | t->aalgos = ut->aalgos; | |
1363 | t->ealgos = ut->ealgos; | |
1364 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1365 | /* If all masks are ~0, then we allow all algorithms. */ |
1366 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1367 | t->encap_family = ut->family; |
1da177e4 LT |
1368 | } |
1369 | } | |
1370 | ||
b4ad86bf DM |
1371 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1372 | { | |
1373 | int i; | |
1374 | ||
1375 | if (nr > XFRM_MAX_DEPTH) | |
1376 | return -EINVAL; | |
1377 | ||
1378 | for (i = 0; i < nr; i++) { | |
1379 | /* We never validated the ut->family value, so many | |
1380 | * applications simply leave it at zero. The check was | |
1381 | * never made and ut->family was ignored because all | |
1382 | * templates could be assumed to have the same family as | |
1383 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1384 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1385 | */ | |
1386 | if (!ut[i].family) | |
1387 | ut[i].family = family; | |
1388 | ||
1389 | switch (ut[i].family) { | |
1390 | case AF_INET: | |
1391 | break; | |
dfd56b8b | 1392 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1393 | case AF_INET6: |
1394 | break; | |
1395 | #endif | |
1396 | default: | |
1397 | return -EINVAL; | |
3ff50b79 | 1398 | } |
b4ad86bf DM |
1399 | } |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
5424f32e | 1404 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1405 | { |
5424f32e | 1406 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1407 | |
1408 | if (!rt) { | |
1409 | pol->xfrm_nr = 0; | |
1410 | } else { | |
5424f32e TG |
1411 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1412 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1413 | int err; |
1da177e4 | 1414 | |
b4ad86bf DM |
1415 | err = validate_tmpl(nr, utmpl, pol->family); |
1416 | if (err) | |
1417 | return err; | |
1da177e4 | 1418 | |
5424f32e | 1419 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1420 | } |
1421 | return 0; | |
1422 | } | |
1423 | ||
5424f32e | 1424 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1425 | { |
5424f32e | 1426 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1427 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1428 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1429 | int err; |
1430 | ||
1431 | if (rt) { | |
5424f32e | 1432 | upt = nla_data(rt); |
f7b6983f MN |
1433 | type = upt->type; |
1434 | } | |
1435 | ||
1436 | err = verify_policy_type(type); | |
1437 | if (err) | |
1438 | return err; | |
1439 | ||
1440 | *tp = type; | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1da177e4 LT |
1444 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1445 | { | |
1446 | xp->priority = p->priority; | |
1447 | xp->index = p->index; | |
1448 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1449 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1450 | xp->action = p->action; | |
1451 | xp->flags = p->flags; | |
1452 | xp->family = p->sel.family; | |
1453 | /* XXX xp->share = p->share; */ | |
1454 | } | |
1455 | ||
1456 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1457 | { | |
7b789836 | 1458 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
1459 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
1460 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1461 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1462 | p->priority = xp->priority; | |
1463 | p->index = xp->index; | |
1464 | p->sel.family = xp->family; | |
1465 | p->dir = dir; | |
1466 | p->action = xp->action; | |
1467 | p->flags = xp->flags; | |
1468 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1469 | } | |
1470 | ||
fc34acd3 | 1471 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1472 | { |
fc34acd3 | 1473 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1474 | int err; |
1475 | ||
1476 | if (!xp) { | |
1477 | *errp = -ENOMEM; | |
1478 | return NULL; | |
1479 | } | |
1480 | ||
1481 | copy_from_user_policy(xp, p); | |
df71837d | 1482 | |
35a7aa08 | 1483 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1484 | if (err) |
1485 | goto error; | |
1486 | ||
35a7aa08 TG |
1487 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1488 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1489 | if (err) |
1490 | goto error; | |
1da177e4 | 1491 | |
295fae56 JHS |
1492 | xfrm_mark_get(attrs, &xp->mark); |
1493 | ||
1da177e4 | 1494 | return xp; |
f7b6983f MN |
1495 | error: |
1496 | *errp = err; | |
12a169e7 | 1497 | xp->walk.dead = 1; |
64c31b3f | 1498 | xfrm_policy_destroy(xp); |
f7b6983f | 1499 | return NULL; |
1da177e4 LT |
1500 | } |
1501 | ||
22e70050 | 1502 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1503 | struct nlattr **attrs) |
1da177e4 | 1504 | { |
fc34acd3 | 1505 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1506 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1507 | struct xfrm_policy *xp; |
26b15dad | 1508 | struct km_event c; |
1da177e4 LT |
1509 | int err; |
1510 | int excl; | |
1511 | ||
1512 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1513 | if (err) |
1514 | return err; | |
35a7aa08 | 1515 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1516 | if (err) |
1517 | return err; | |
1518 | ||
fc34acd3 | 1519 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1520 | if (!xp) |
1521 | return err; | |
1522 | ||
25985edc | 1523 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1524 | * Aha! this is anti-netlink really i.e more pfkey derived |
1525 | * in netlink excl is a flag and you wouldnt need | |
1526 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1527 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1528 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2e71029e | 1529 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 1530 | |
1da177e4 | 1531 | if (err) { |
03e1ad7b | 1532 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1533 | kfree(xp); |
1534 | return err; | |
1535 | } | |
1536 | ||
f60f6b8f | 1537 | c.event = nlh->nlmsg_type; |
26b15dad | 1538 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1539 | c.portid = nlh->nlmsg_pid; |
26b15dad JHS |
1540 | km_policy_notify(xp, p->dir, &c); |
1541 | ||
1da177e4 LT |
1542 | xfrm_pol_put(xp); |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
1547 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1548 | { | |
1549 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1550 | int i; | |
1551 | ||
1552 | if (xp->xfrm_nr == 0) | |
1553 | return 0; | |
1554 | ||
1555 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1556 | struct xfrm_user_tmpl *up = &vec[i]; | |
1557 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1558 | ||
1f86840f | 1559 | memset(up, 0, sizeof(*up)); |
1da177e4 | 1560 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
8511d01d | 1561 | up->family = kp->encap_family; |
1da177e4 LT |
1562 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1563 | up->reqid = kp->reqid; | |
1564 | up->mode = kp->mode; | |
1565 | up->share = kp->share; | |
1566 | up->optional = kp->optional; | |
1567 | up->aalgos = kp->aalgos; | |
1568 | up->ealgos = kp->ealgos; | |
1569 | up->calgos = kp->calgos; | |
1570 | } | |
df71837d | 1571 | |
c0144bea TG |
1572 | return nla_put(skb, XFRMA_TMPL, |
1573 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1574 | } |
1575 | ||
1576 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1577 | { | |
1578 | if (x->security) { | |
1579 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1580 | } |
1581 | return 0; | |
0d681623 | 1582 | } |
df71837d | 1583 | |
0d681623 SH |
1584 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1585 | { | |
1d1e34dd | 1586 | if (xp->security) |
0d681623 | 1587 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1588 | return 0; |
df71837d | 1589 | } |
cfbfd45a TG |
1590 | static inline size_t userpolicy_type_attrsize(void) |
1591 | { | |
1592 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1593 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1594 | #else | |
1595 | return 0; | |
1596 | #endif | |
1597 | } | |
df71837d | 1598 | |
f7b6983f | 1599 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1600 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1601 | { |
c0144bea TG |
1602 | struct xfrm_userpolicy_type upt = { |
1603 | .type = type, | |
1604 | }; | |
f7b6983f | 1605 | |
c0144bea | 1606 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1607 | } |
1608 | ||
1609 | #else | |
b798a9ed | 1610 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1611 | { |
1612 | return 0; | |
1613 | } | |
1614 | #endif | |
1615 | ||
1da177e4 LT |
1616 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1617 | { | |
1618 | struct xfrm_dump_info *sp = ptr; | |
1619 | struct xfrm_userpolicy_info *p; | |
1620 | struct sk_buff *in_skb = sp->in_skb; | |
1621 | struct sk_buff *skb = sp->out_skb; | |
1622 | struct nlmsghdr *nlh; | |
1d1e34dd | 1623 | int err; |
1da177e4 | 1624 | |
15e47304 | 1625 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
79b8b7f4 TG |
1626 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
1627 | if (nlh == NULL) | |
1628 | return -EMSGSIZE; | |
1da177e4 | 1629 | |
7b67c857 | 1630 | p = nlmsg_data(nlh); |
1da177e4 | 1631 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1632 | err = copy_to_user_tmpl(xp, skb); |
1633 | if (!err) | |
1634 | err = copy_to_user_sec_ctx(xp, skb); | |
1635 | if (!err) | |
1636 | err = copy_to_user_policy_type(xp->type, skb); | |
1637 | if (!err) | |
1638 | err = xfrm_mark_put(skb, &xp->mark); | |
1639 | if (err) { | |
1640 | nlmsg_cancel(skb, nlh); | |
1641 | return err; | |
1642 | } | |
9825069d | 1643 | nlmsg_end(skb, nlh); |
1da177e4 | 1644 | return 0; |
1da177e4 LT |
1645 | } |
1646 | ||
4c563f76 TT |
1647 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1648 | { | |
1649 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
283bc9f3 | 1650 | struct net *net = sock_net(cb->skb->sk); |
4c563f76 | 1651 | |
283bc9f3 | 1652 | xfrm_policy_walk_done(walk, net); |
4c563f76 TT |
1653 | return 0; |
1654 | } | |
1655 | ||
1da177e4 LT |
1656 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1657 | { | |
fc34acd3 | 1658 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1659 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1660 | struct xfrm_dump_info info; |
1661 | ||
4c563f76 TT |
1662 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1663 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1664 | ||
1da177e4 LT |
1665 | info.in_skb = cb->skb; |
1666 | info.out_skb = skb; | |
1667 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1668 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1669 | |
1670 | if (!cb->args[0]) { | |
1671 | cb->args[0] = 1; | |
1672 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1673 | } | |
1674 | ||
fc34acd3 | 1675 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1676 | |
1677 | return skb->len; | |
1678 | } | |
1679 | ||
1680 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1681 | struct xfrm_policy *xp, | |
1682 | int dir, u32 seq) | |
1683 | { | |
1684 | struct xfrm_dump_info info; | |
1685 | struct sk_buff *skb; | |
c2546372 | 1686 | int err; |
1da177e4 | 1687 | |
7deb2264 | 1688 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1689 | if (!skb) |
1690 | return ERR_PTR(-ENOMEM); | |
1691 | ||
1da177e4 LT |
1692 | info.in_skb = in_skb; |
1693 | info.out_skb = skb; | |
1694 | info.nlmsg_seq = seq; | |
1695 | info.nlmsg_flags = 0; | |
1da177e4 | 1696 | |
c2546372 MK |
1697 | err = dump_one_policy(xp, dir, 0, &info); |
1698 | if (err) { | |
1da177e4 | 1699 | kfree_skb(skb); |
c2546372 | 1700 | return ERR_PTR(err); |
1da177e4 LT |
1701 | } |
1702 | ||
1703 | return skb; | |
1704 | } | |
1705 | ||
22e70050 | 1706 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1707 | struct nlattr **attrs) |
1da177e4 | 1708 | { |
fc34acd3 | 1709 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1710 | struct xfrm_policy *xp; |
1711 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1712 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1713 | int err; |
26b15dad | 1714 | struct km_event c; |
1da177e4 | 1715 | int delete; |
295fae56 JHS |
1716 | struct xfrm_mark m; |
1717 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1718 | |
7b67c857 | 1719 | p = nlmsg_data(nlh); |
1da177e4 LT |
1720 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1721 | ||
35a7aa08 | 1722 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1723 | if (err) |
1724 | return err; | |
1725 | ||
1da177e4 LT |
1726 | err = verify_policy_dir(p->dir); |
1727 | if (err) | |
1728 | return err; | |
1729 | ||
1730 | if (p->index) | |
295fae56 | 1731 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1732 | else { |
5424f32e | 1733 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1734 | struct xfrm_sec_ctx *ctx; |
df71837d | 1735 | |
35a7aa08 | 1736 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1737 | if (err) |
1738 | return err; | |
1739 | ||
2c8dd116 | 1740 | ctx = NULL; |
df71837d | 1741 | if (rt) { |
5424f32e | 1742 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1743 | |
52a4c640 | 1744 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 1745 | if (err) |
df71837d | 1746 | return err; |
2c8dd116 | 1747 | } |
295fae56 | 1748 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1749 | ctx, delete, &err); |
03e1ad7b | 1750 | security_xfrm_policy_free(ctx); |
df71837d | 1751 | } |
1da177e4 LT |
1752 | if (xp == NULL) |
1753 | return -ENOENT; | |
1754 | ||
1755 | if (!delete) { | |
1756 | struct sk_buff *resp_skb; | |
1757 | ||
1758 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1759 | if (IS_ERR(resp_skb)) { | |
1760 | err = PTR_ERR(resp_skb); | |
1761 | } else { | |
a6483b79 | 1762 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
15e47304 | 1763 | NETLINK_CB(skb).portid); |
1da177e4 | 1764 | } |
26b15dad | 1765 | } else { |
2e71029e | 1766 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
1767 | |
1768 | if (err != 0) | |
c8c05a8e | 1769 | goto out; |
13fcfbb0 | 1770 | |
e7443892 | 1771 | c.data.byid = p->index; |
f60f6b8f | 1772 | c.event = nlh->nlmsg_type; |
26b15dad | 1773 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1774 | c.portid = nlh->nlmsg_pid; |
26b15dad | 1775 | km_policy_notify(xp, p->dir, &c); |
1da177e4 LT |
1776 | } |
1777 | ||
c8c05a8e | 1778 | out: |
ef41aaa0 | 1779 | xfrm_pol_put(xp); |
e4c17216 PM |
1780 | if (delete && err == 0) |
1781 | xfrm_garbage_collect(net); | |
1da177e4 LT |
1782 | return err; |
1783 | } | |
1784 | ||
22e70050 | 1785 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1786 | struct nlattr **attrs) |
1da177e4 | 1787 | { |
fc34acd3 | 1788 | struct net *net = sock_net(skb->sk); |
26b15dad | 1789 | struct km_event c; |
7b67c857 | 1790 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
4aa2e62c | 1791 | int err; |
1da177e4 | 1792 | |
2e71029e | 1793 | err = xfrm_state_flush(net, p->proto, true); |
9e64cc95 JHS |
1794 | if (err) { |
1795 | if (err == -ESRCH) /* empty table */ | |
1796 | return 0; | |
069c474e | 1797 | return err; |
9e64cc95 | 1798 | } |
bf08867f | 1799 | c.data.proto = p->proto; |
f60f6b8f | 1800 | c.event = nlh->nlmsg_type; |
26b15dad | 1801 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1802 | c.portid = nlh->nlmsg_pid; |
7067802e | 1803 | c.net = net; |
26b15dad JHS |
1804 | km_state_notify(NULL, &c); |
1805 | ||
1da177e4 LT |
1806 | return 0; |
1807 | } | |
1808 | ||
d8647b79 | 1809 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1810 | { |
d8647b79 SK |
1811 | size_t replay_size = x->replay_esn ? |
1812 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1813 | sizeof(struct xfrm_replay_state); | |
1814 | ||
7deb2264 | 1815 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1816 | + nla_total_size(replay_size) |
de95c4a4 | 1817 | + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1818 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1819 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1820 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1821 | } | |
d51d081d | 1822 | |
214e005b | 1823 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1824 | { |
1825 | struct xfrm_aevent_id *id; | |
1826 | struct nlmsghdr *nlh; | |
1d1e34dd | 1827 | int err; |
d51d081d | 1828 | |
15e47304 | 1829 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
79b8b7f4 TG |
1830 | if (nlh == NULL) |
1831 | return -EMSGSIZE; | |
d51d081d | 1832 | |
7b67c857 | 1833 | id = nlmsg_data(nlh); |
9b7a787d | 1834 | memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); |
d51d081d JHS |
1835 | id->sa_id.spi = x->id.spi; |
1836 | id->sa_id.family = x->props.family; | |
1837 | id->sa_id.proto = x->id.proto; | |
9b7a787d | 1838 | memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); |
2b5f6dcc | 1839 | id->reqid = x->props.reqid; |
d51d081d JHS |
1840 | id->flags = c->data.aevent; |
1841 | ||
d0fde795 | 1842 | if (x->replay_esn) { |
1d1e34dd DM |
1843 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1844 | xfrm_replay_state_esn_len(x->replay_esn), | |
1845 | x->replay_esn); | |
d0fde795 | 1846 | } else { |
1d1e34dd DM |
1847 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1848 | &x->replay); | |
d0fde795 | 1849 | } |
1d1e34dd DM |
1850 | if (err) |
1851 | goto out_cancel; | |
de95c4a4 ND |
1852 | err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft, |
1853 | XFRMA_PAD); | |
1d1e34dd DM |
1854 | if (err) |
1855 | goto out_cancel; | |
d51d081d | 1856 | |
1d1e34dd DM |
1857 | if (id->flags & XFRM_AE_RTHR) { |
1858 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1859 | if (err) | |
1860 | goto out_cancel; | |
1861 | } | |
1862 | if (id->flags & XFRM_AE_ETHR) { | |
1863 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1864 | x->replay_maxage * 10 / HZ); | |
1865 | if (err) | |
1866 | goto out_cancel; | |
1867 | } | |
1868 | err = xfrm_mark_put(skb, &x->mark); | |
1869 | if (err) | |
1870 | goto out_cancel; | |
6f26b61e | 1871 | |
053c095a JB |
1872 | nlmsg_end(skb, nlh); |
1873 | return 0; | |
d51d081d | 1874 | |
1d1e34dd | 1875 | out_cancel: |
9825069d | 1876 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1877 | return err; |
d51d081d JHS |
1878 | } |
1879 | ||
22e70050 | 1880 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1881 | struct nlattr **attrs) |
d51d081d | 1882 | { |
fc34acd3 | 1883 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1884 | struct xfrm_state *x; |
1885 | struct sk_buff *r_skb; | |
1886 | int err; | |
1887 | struct km_event c; | |
6f26b61e JHS |
1888 | u32 mark; |
1889 | struct xfrm_mark m; | |
7b67c857 | 1890 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1891 | struct xfrm_usersa_id *id = &p->sa_id; |
1892 | ||
6f26b61e JHS |
1893 | mark = xfrm_mark_get(attrs, &m); |
1894 | ||
1895 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1896 | if (x == NULL) |
d51d081d | 1897 | return -ESRCH; |
d8647b79 SK |
1898 | |
1899 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1900 | if (r_skb == NULL) { | |
1901 | xfrm_state_put(x); | |
1902 | return -ENOMEM; | |
d51d081d JHS |
1903 | } |
1904 | ||
1905 | /* | |
1906 | * XXX: is this lock really needed - none of the other | |
1907 | * gets lock (the concern is things getting updated | |
1908 | * while we are still reading) - jhs | |
1909 | */ | |
1910 | spin_lock_bh(&x->lock); | |
1911 | c.data.aevent = p->flags; | |
1912 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1913 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1914 | |
1915 | if (build_aevent(r_skb, x, &c) < 0) | |
1916 | BUG(); | |
15e47304 | 1917 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); |
d51d081d JHS |
1918 | spin_unlock_bh(&x->lock); |
1919 | xfrm_state_put(x); | |
1920 | return err; | |
1921 | } | |
1922 | ||
22e70050 | 1923 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1924 | struct nlattr **attrs) |
d51d081d | 1925 | { |
fc34acd3 | 1926 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1927 | struct xfrm_state *x; |
1928 | struct km_event c; | |
02d0892f | 1929 | int err = -EINVAL; |
6f26b61e JHS |
1930 | u32 mark = 0; |
1931 | struct xfrm_mark m; | |
7b67c857 | 1932 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1933 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1934 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1935 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
4e077237 MR |
1936 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; |
1937 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 1938 | |
4e077237 | 1939 | if (!lt && !rp && !re && !et && !rt) |
d51d081d JHS |
1940 | return err; |
1941 | ||
1942 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1943 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1944 | return err; | |
1945 | ||
6f26b61e JHS |
1946 | mark = xfrm_mark_get(attrs, &m); |
1947 | ||
1948 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1949 | if (x == NULL) |
1950 | return -ESRCH; | |
1951 | ||
1952 | if (x->km.state != XFRM_STATE_VALID) | |
1953 | goto out; | |
1954 | ||
4479ff76 | 1955 | err = xfrm_replay_verify_len(x->replay_esn, re); |
e2b19125 SK |
1956 | if (err) |
1957 | goto out; | |
1958 | ||
d51d081d | 1959 | spin_lock_bh(&x->lock); |
e3ac104d | 1960 | xfrm_update_ae_params(x, attrs, 1); |
d51d081d | 1961 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1962 | |
1963 | c.event = nlh->nlmsg_type; | |
1964 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1965 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1966 | c.data.aevent = XFRM_AE_CU; |
1967 | km_state_notify(x, &c); | |
1968 | err = 0; | |
1969 | out: | |
1970 | xfrm_state_put(x); | |
1971 | return err; | |
1972 | } | |
1973 | ||
22e70050 | 1974 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1975 | struct nlattr **attrs) |
1da177e4 | 1976 | { |
fc34acd3 | 1977 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1978 | struct km_event c; |
b798a9ed | 1979 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1980 | int err; |
1981 | ||
35a7aa08 | 1982 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1983 | if (err) |
1984 | return err; | |
26b15dad | 1985 | |
2e71029e | 1986 | err = xfrm_policy_flush(net, type, true); |
2f1eb65f JHS |
1987 | if (err) { |
1988 | if (err == -ESRCH) /* empty table */ | |
1989 | return 0; | |
069c474e | 1990 | return err; |
2f1eb65f JHS |
1991 | } |
1992 | ||
f7b6983f | 1993 | c.data.type = type; |
f60f6b8f | 1994 | c.event = nlh->nlmsg_type; |
26b15dad | 1995 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1996 | c.portid = nlh->nlmsg_pid; |
7067802e | 1997 | c.net = net; |
26b15dad | 1998 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1999 | return 0; |
2000 | } | |
2001 | ||
22e70050 | 2002 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2003 | struct nlattr **attrs) |
6c5c8ca7 | 2004 | { |
fc34acd3 | 2005 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 2006 | struct xfrm_policy *xp; |
7b67c857 | 2007 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 2008 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 2009 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 2010 | int err = -ENOENT; |
295fae56 JHS |
2011 | struct xfrm_mark m; |
2012 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 2013 | |
35a7aa08 | 2014 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
2015 | if (err) |
2016 | return err; | |
2017 | ||
c8bf4d04 TT |
2018 | err = verify_policy_dir(p->dir); |
2019 | if (err) | |
2020 | return err; | |
2021 | ||
6c5c8ca7 | 2022 | if (p->index) |
295fae56 | 2023 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 2024 | else { |
5424f32e | 2025 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 2026 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 2027 | |
35a7aa08 | 2028 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
2029 | if (err) |
2030 | return err; | |
2031 | ||
2c8dd116 | 2032 | ctx = NULL; |
6c5c8ca7 | 2033 | if (rt) { |
5424f32e | 2034 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 2035 | |
52a4c640 | 2036 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 2037 | if (err) |
6c5c8ca7 | 2038 | return err; |
2c8dd116 | 2039 | } |
295fae56 | 2040 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 2041 | &p->sel, ctx, 0, &err); |
03e1ad7b | 2042 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 2043 | } |
6c5c8ca7 | 2044 | if (xp == NULL) |
ef41aaa0 | 2045 | return -ENOENT; |
03e1ad7b | 2046 | |
ea2dea9d | 2047 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 2048 | goto out; |
6c5c8ca7 | 2049 | |
6c5c8ca7 JHS |
2050 | err = 0; |
2051 | if (up->hard) { | |
2052 | xfrm_policy_delete(xp, p->dir); | |
2e71029e | 2053 | xfrm_audit_policy_delete(xp, 1, true); |
6c5c8ca7 JHS |
2054 | } else { |
2055 | // reset the timers here? | |
0c199a90 | 2056 | WARN(1, "Don't know what to do with soft policy expire\n"); |
6c5c8ca7 | 2057 | } |
c6bb8136 | 2058 | km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); |
6c5c8ca7 JHS |
2059 | |
2060 | out: | |
2061 | xfrm_pol_put(xp); | |
2062 | return err; | |
2063 | } | |
2064 | ||
22e70050 | 2065 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2066 | struct nlattr **attrs) |
53bc6b4d | 2067 | { |
fc34acd3 | 2068 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
2069 | struct xfrm_state *x; |
2070 | int err; | |
7b67c857 | 2071 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 2072 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 2073 | struct xfrm_mark m; |
928497f0 | 2074 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 2075 | |
6f26b61e | 2076 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 2077 | |
3a765aa5 | 2078 | err = -ENOENT; |
53bc6b4d JHS |
2079 | if (x == NULL) |
2080 | return err; | |
2081 | ||
53bc6b4d | 2082 | spin_lock_bh(&x->lock); |
3a765aa5 | 2083 | err = -EINVAL; |
53bc6b4d JHS |
2084 | if (x->km.state != XFRM_STATE_VALID) |
2085 | goto out; | |
c6bb8136 | 2086 | km_state_expired(x, ue->hard, nlh->nlmsg_pid); |
53bc6b4d | 2087 | |
161a09e7 | 2088 | if (ue->hard) { |
53bc6b4d | 2089 | __xfrm_state_delete(x); |
2e71029e | 2090 | xfrm_audit_state_delete(x, 1, true); |
161a09e7 | 2091 | } |
3a765aa5 | 2092 | err = 0; |
53bc6b4d JHS |
2093 | out: |
2094 | spin_unlock_bh(&x->lock); | |
2095 | xfrm_state_put(x); | |
2096 | return err; | |
2097 | } | |
2098 | ||
22e70050 | 2099 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2100 | struct nlattr **attrs) |
980ebd25 | 2101 | { |
fc34acd3 | 2102 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
2103 | struct xfrm_policy *xp; |
2104 | struct xfrm_user_tmpl *ut; | |
2105 | int i; | |
5424f32e | 2106 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 2107 | struct xfrm_mark mark; |
980ebd25 | 2108 | |
7b67c857 | 2109 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 2110 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
2111 | int err = -ENOMEM; |
2112 | ||
2113 | if (!x) | |
d8eb9307 | 2114 | goto nomem; |
980ebd25 | 2115 | |
6f26b61e JHS |
2116 | xfrm_mark_get(attrs, &mark); |
2117 | ||
980ebd25 | 2118 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2119 | if (err) |
2120 | goto bad_policy; | |
980ebd25 JHS |
2121 | |
2122 | /* build an XP */ | |
fc34acd3 | 2123 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2124 | if (!xp) |
2125 | goto free_state; | |
980ebd25 JHS |
2126 | |
2127 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2128 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2129 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2130 | xp->mark.m = x->mark.m = mark.m; |
2131 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2132 | ut = nla_data(rt); |
980ebd25 JHS |
2133 | /* extract the templates and for each call km_key */ |
2134 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2135 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2136 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2137 | x->props.mode = t->mode; | |
2138 | x->props.reqid = t->reqid; | |
2139 | x->props.family = ut->family; | |
2140 | t->aalgos = ua->aalgos; | |
2141 | t->ealgos = ua->ealgos; | |
2142 | t->calgos = ua->calgos; | |
2143 | err = km_query(x, t, xp); | |
2144 | ||
2145 | } | |
2146 | ||
2147 | kfree(x); | |
2148 | kfree(xp); | |
2149 | ||
2150 | return 0; | |
d8eb9307 IJ |
2151 | |
2152 | bad_policy: | |
62db5cfd | 2153 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2154 | free_state: |
2155 | kfree(x); | |
2156 | nomem: | |
2157 | return err; | |
980ebd25 JHS |
2158 | } |
2159 | ||
5c79de6e | 2160 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2161 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2162 | struct xfrm_kmaddress *k, |
5424f32e | 2163 | struct nlattr **attrs, int *num) |
5c79de6e | 2164 | { |
5424f32e | 2165 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2166 | struct xfrm_user_migrate *um; |
2167 | int i, num_migrate; | |
2168 | ||
13c1d189 AE |
2169 | if (k != NULL) { |
2170 | struct xfrm_user_kmaddress *uk; | |
2171 | ||
2172 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2173 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2174 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2175 | k->family = uk->family; | |
2176 | k->reserved = uk->reserved; | |
2177 | } | |
2178 | ||
5424f32e TG |
2179 | um = nla_data(rt); |
2180 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2181 | |
2182 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2183 | return -EINVAL; | |
2184 | ||
2185 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2186 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2187 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2188 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2189 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2190 | ||
2191 | ma->proto = um->proto; | |
2192 | ma->mode = um->mode; | |
2193 | ma->reqid = um->reqid; | |
2194 | ||
2195 | ma->old_family = um->old_family; | |
2196 | ma->new_family = um->new_family; | |
2197 | } | |
2198 | ||
2199 | *num = i; | |
2200 | return 0; | |
2201 | } | |
2202 | ||
2203 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2204 | struct nlattr **attrs) |
5c79de6e | 2205 | { |
7b67c857 | 2206 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2207 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2208 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2209 | u8 type; |
2210 | int err; | |
2211 | int n = 0; | |
8d549c4f | 2212 | struct net *net = sock_net(skb->sk); |
5c79de6e | 2213 | |
35a7aa08 | 2214 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2215 | return -EINVAL; |
5c79de6e | 2216 | |
13c1d189 AE |
2217 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2218 | ||
5424f32e | 2219 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2220 | if (err) |
2221 | return err; | |
2222 | ||
13c1d189 | 2223 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2224 | if (err) |
2225 | return err; | |
2226 | ||
2227 | if (!n) | |
2228 | return 0; | |
2229 | ||
8d549c4f | 2230 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net); |
5c79de6e SS |
2231 | |
2232 | return 0; | |
2233 | } | |
2234 | #else | |
2235 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2236 | struct nlattr **attrs) |
5c79de6e SS |
2237 | { |
2238 | return -ENOPROTOOPT; | |
2239 | } | |
2240 | #endif | |
2241 | ||
2242 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2243 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2244 | { |
2245 | struct xfrm_user_migrate um; | |
2246 | ||
2247 | memset(&um, 0, sizeof(um)); | |
2248 | um.proto = m->proto; | |
2249 | um.mode = m->mode; | |
2250 | um.reqid = m->reqid; | |
2251 | um.old_family = m->old_family; | |
2252 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2253 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2254 | um.new_family = m->new_family; | |
2255 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2256 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2257 | ||
c0144bea | 2258 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2259 | } |
2260 | ||
183cad12 | 2261 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2262 | { |
2263 | struct xfrm_user_kmaddress uk; | |
2264 | ||
2265 | memset(&uk, 0, sizeof(uk)); | |
2266 | uk.family = k->family; | |
2267 | uk.reserved = k->reserved; | |
2268 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2269 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2270 | |
2271 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2272 | } | |
2273 | ||
2274 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2275 | { |
2276 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2277 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2278 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2279 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2280 | } |
2281 | ||
183cad12 DM |
2282 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2283 | int num_migrate, const struct xfrm_kmaddress *k, | |
2284 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2285 | { |
183cad12 | 2286 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2287 | struct xfrm_userpolicy_id *pol_id; |
2288 | struct nlmsghdr *nlh; | |
1d1e34dd | 2289 | int i, err; |
5c79de6e | 2290 | |
79b8b7f4 TG |
2291 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2292 | if (nlh == NULL) | |
2293 | return -EMSGSIZE; | |
5c79de6e | 2294 | |
7b67c857 | 2295 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2296 | /* copy data from selector, dir, and type to the pol_id */ |
2297 | memset(pol_id, 0, sizeof(*pol_id)); | |
2298 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2299 | pol_id->dir = dir; | |
2300 | ||
1d1e34dd DM |
2301 | if (k != NULL) { |
2302 | err = copy_to_user_kmaddress(k, skb); | |
2303 | if (err) | |
2304 | goto out_cancel; | |
2305 | } | |
2306 | err = copy_to_user_policy_type(type, skb); | |
2307 | if (err) | |
2308 | goto out_cancel; | |
5c79de6e | 2309 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2310 | err = copy_to_user_migrate(mp, skb); |
2311 | if (err) | |
2312 | goto out_cancel; | |
5c79de6e SS |
2313 | } |
2314 | ||
053c095a JB |
2315 | nlmsg_end(skb, nlh); |
2316 | return 0; | |
1d1e34dd DM |
2317 | |
2318 | out_cancel: | |
9825069d | 2319 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2320 | return err; |
5c79de6e SS |
2321 | } |
2322 | ||
183cad12 DM |
2323 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2324 | const struct xfrm_migrate *m, int num_migrate, | |
2325 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2326 | { |
a6483b79 | 2327 | struct net *net = &init_net; |
5c79de6e | 2328 | struct sk_buff *skb; |
5c79de6e | 2329 | |
13c1d189 | 2330 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2331 | if (skb == NULL) |
2332 | return -ENOMEM; | |
2333 | ||
2334 | /* build migrate */ | |
13c1d189 | 2335 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2336 | BUG(); |
2337 | ||
21ee543e | 2338 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); |
5c79de6e SS |
2339 | } |
2340 | #else | |
183cad12 DM |
2341 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2342 | const struct xfrm_migrate *m, int num_migrate, | |
2343 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2344 | { |
2345 | return -ENOPROTOOPT; | |
2346 | } | |
2347 | #endif | |
d51d081d | 2348 | |
a7bd9a45 | 2349 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2350 | |
2351 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2352 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2353 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2354 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2355 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2356 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2357 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2358 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2359 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2360 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2361 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2362 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2363 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2364 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2365 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2366 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2367 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2368 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2369 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 | 2370 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
880a6fab | 2371 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
a7bd9a45 | 2372 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
1da177e4 LT |
2373 | }; |
2374 | ||
492b558b TG |
2375 | #undef XMSGSIZE |
2376 | ||
cf5cb79f | 2377 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2378 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2379 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2380 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2381 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2382 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2383 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2384 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2385 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2386 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2387 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2388 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2389 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2390 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2391 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2392 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2393 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2394 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2395 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2396 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2397 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2398 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2399 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2400 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
a947b0a9 | 2401 | [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, |
d3623099 | 2402 | [XFRMA_PROTO] = { .type = NLA_U8 }, |
870a2df4 | 2403 | [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, |
cf5cb79f TG |
2404 | }; |
2405 | ||
880a6fab CG |
2406 | static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { |
2407 | [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2408 | [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2409 | }; | |
2410 | ||
05600a79 | 2411 | static const struct xfrm_link { |
5424f32e | 2412 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2413 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2414 | int (*done)(struct netlink_callback *); |
880a6fab CG |
2415 | const struct nla_policy *nla_pol; |
2416 | int nla_max; | |
492b558b TG |
2417 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2418 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2419 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2420 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2421 | .dump = xfrm_dump_sa, |
2422 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2423 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2424 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2425 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2426 | .dump = xfrm_dump_policy, |
2427 | .done = xfrm_dump_policy_done }, | |
492b558b | 2428 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2429 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2430 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2431 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2432 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2433 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2434 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2435 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2436 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2437 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2438 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2439 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
880a6fab CG |
2440 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, |
2441 | .nla_pol = xfrma_spd_policy, | |
2442 | .nla_max = XFRMA_SPD_MAX }, | |
ecfd6b18 | 2443 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2444 | }; |
2445 | ||
1d00a4eb | 2446 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2447 | { |
a6483b79 | 2448 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2449 | struct nlattr *attrs[XFRMA_MAX+1]; |
05600a79 | 2450 | const struct xfrm_link *link; |
a7bd9a45 | 2451 | int type, err; |
1da177e4 | 2452 | |
74005991 | 2453 | #ifdef CONFIG_COMPAT |
2bf8c476 | 2454 | if (in_compat_syscall()) |
74005991 FD |
2455 | return -ENOTSUPP; |
2456 | #endif | |
2457 | ||
1da177e4 | 2458 | type = nlh->nlmsg_type; |
1da177e4 | 2459 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2460 | return -EINVAL; |
1da177e4 LT |
2461 | |
2462 | type -= XFRM_MSG_BASE; | |
2463 | link = &xfrm_dispatch[type]; | |
2464 | ||
2465 | /* All operations require privileges, even GET */ | |
90f62cf3 | 2466 | if (!netlink_net_capable(skb, CAP_NET_ADMIN)) |
1d00a4eb | 2467 | return -EPERM; |
1da177e4 | 2468 | |
492b558b TG |
2469 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2470 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2471 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2472 | if (link->dump == NULL) |
1d00a4eb | 2473 | return -EINVAL; |
88fc2c84 | 2474 | |
80d326fa PNA |
2475 | { |
2476 | struct netlink_dump_control c = { | |
2477 | .dump = link->dump, | |
2478 | .done = link->done, | |
2479 | }; | |
2480 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2481 | } | |
1da177e4 LT |
2482 | } |
2483 | ||
880a6fab CG |
2484 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, |
2485 | link->nla_max ? : XFRMA_MAX, | |
2486 | link->nla_pol ? : xfrma_policy); | |
a7bd9a45 TG |
2487 | if (err < 0) |
2488 | return err; | |
1da177e4 LT |
2489 | |
2490 | if (link->doit == NULL) | |
1d00a4eb | 2491 | return -EINVAL; |
1da177e4 | 2492 | |
5424f32e | 2493 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2494 | } |
2495 | ||
cd40b7d3 | 2496 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2497 | { |
283bc9f3 FD |
2498 | struct net *net = sock_net(skb->sk); |
2499 | ||
2500 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); | |
cd40b7d3 | 2501 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); |
283bc9f3 | 2502 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
2503 | } |
2504 | ||
7deb2264 TG |
2505 | static inline size_t xfrm_expire_msgsize(void) |
2506 | { | |
6f26b61e JHS |
2507 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2508 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2509 | } |
2510 | ||
214e005b | 2511 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2512 | { |
2513 | struct xfrm_user_expire *ue; | |
2514 | struct nlmsghdr *nlh; | |
1d1e34dd | 2515 | int err; |
1da177e4 | 2516 | |
15e47304 | 2517 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
79b8b7f4 TG |
2518 | if (nlh == NULL) |
2519 | return -EMSGSIZE; | |
1da177e4 | 2520 | |
7b67c857 | 2521 | ue = nlmsg_data(nlh); |
1da177e4 | 2522 | copy_to_user_state(x, &ue->state); |
d51d081d | 2523 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2524 | |
1d1e34dd DM |
2525 | err = xfrm_mark_put(skb, &x->mark); |
2526 | if (err) | |
2527 | return err; | |
6f26b61e | 2528 | |
053c095a JB |
2529 | nlmsg_end(skb, nlh); |
2530 | return 0; | |
1da177e4 LT |
2531 | } |
2532 | ||
214e005b | 2533 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2534 | { |
fc34acd3 | 2535 | struct net *net = xs_net(x); |
1da177e4 LT |
2536 | struct sk_buff *skb; |
2537 | ||
7deb2264 | 2538 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2539 | if (skb == NULL) |
2540 | return -ENOMEM; | |
2541 | ||
6f26b61e JHS |
2542 | if (build_expire(skb, x, c) < 0) { |
2543 | kfree_skb(skb); | |
2544 | return -EMSGSIZE; | |
2545 | } | |
1da177e4 | 2546 | |
21ee543e | 2547 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2548 | } |
2549 | ||
214e005b | 2550 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2551 | { |
fc34acd3 | 2552 | struct net *net = xs_net(x); |
d51d081d | 2553 | struct sk_buff *skb; |
d51d081d | 2554 | |
d8647b79 | 2555 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2556 | if (skb == NULL) |
2557 | return -ENOMEM; | |
2558 | ||
2559 | if (build_aevent(skb, x, c) < 0) | |
2560 | BUG(); | |
2561 | ||
21ee543e | 2562 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); |
d51d081d JHS |
2563 | } |
2564 | ||
214e005b | 2565 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2566 | { |
7067802e | 2567 | struct net *net = c->net; |
26b15dad JHS |
2568 | struct xfrm_usersa_flush *p; |
2569 | struct nlmsghdr *nlh; | |
2570 | struct sk_buff *skb; | |
7deb2264 | 2571 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2572 | |
7deb2264 | 2573 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2574 | if (skb == NULL) |
2575 | return -ENOMEM; | |
26b15dad | 2576 | |
15e47304 | 2577 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
79b8b7f4 TG |
2578 | if (nlh == NULL) { |
2579 | kfree_skb(skb); | |
2580 | return -EMSGSIZE; | |
2581 | } | |
26b15dad | 2582 | |
7b67c857 | 2583 | p = nlmsg_data(nlh); |
bf08867f | 2584 | p->proto = c->data.proto; |
26b15dad | 2585 | |
9825069d | 2586 | nlmsg_end(skb, nlh); |
26b15dad | 2587 | |
21ee543e | 2588 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad JHS |
2589 | } |
2590 | ||
7deb2264 | 2591 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2592 | { |
7deb2264 | 2593 | size_t l = 0; |
1a6509d9 HX |
2594 | if (x->aead) |
2595 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2596 | if (x->aalg) { |
2597 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2598 | (x->aalg->alg_key_len + 7) / 8); | |
2599 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2600 | } | |
26b15dad | 2601 | if (x->ealg) |
0f99be0d | 2602 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2603 | if (x->calg) |
7deb2264 | 2604 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2605 | if (x->encap) |
7deb2264 | 2606 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2607 | if (x->tfcpad) |
2608 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2609 | if (x->replay_esn) |
2610 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
f293a5e3 | 2611 | else |
2612 | l += nla_total_size(sizeof(struct xfrm_replay_state)); | |
68325d3b HX |
2613 | if (x->security) |
2614 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2615 | x->security->ctx_len); | |
2616 | if (x->coaddr) | |
2617 | l += nla_total_size(sizeof(*x->coaddr)); | |
a947b0a9 ND |
2618 | if (x->props.extra_flags) |
2619 | l += nla_total_size(sizeof(x->props.extra_flags)); | |
68325d3b | 2620 | |
d26f3984 | 2621 | /* Must count x->lastused as it may become non-zero behind our back. */ |
de95c4a4 | 2622 | l += nla_total_size_64bit(sizeof(u64)); |
26b15dad JHS |
2623 | |
2624 | return l; | |
2625 | } | |
2626 | ||
214e005b | 2627 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2628 | { |
fc34acd3 | 2629 | struct net *net = xs_net(x); |
26b15dad | 2630 | struct xfrm_usersa_info *p; |
0603eac0 | 2631 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2632 | struct nlmsghdr *nlh; |
2633 | struct sk_buff *skb; | |
26b15dad | 2634 | int len = xfrm_sa_len(x); |
1d1e34dd | 2635 | int headlen, err; |
0603eac0 HX |
2636 | |
2637 | headlen = sizeof(*p); | |
2638 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2639 | len += nla_total_size(headlen); |
0603eac0 | 2640 | headlen = sizeof(*id); |
6f26b61e | 2641 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2642 | } |
7deb2264 | 2643 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2644 | |
7deb2264 | 2645 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2646 | if (skb == NULL) |
2647 | return -ENOMEM; | |
26b15dad | 2648 | |
15e47304 | 2649 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2650 | err = -EMSGSIZE; |
79b8b7f4 | 2651 | if (nlh == NULL) |
1d1e34dd | 2652 | goto out_free_skb; |
26b15dad | 2653 | |
7b67c857 | 2654 | p = nlmsg_data(nlh); |
0603eac0 | 2655 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2656 | struct nlattr *attr; |
2657 | ||
7b67c857 | 2658 | id = nlmsg_data(nlh); |
0603eac0 HX |
2659 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2660 | id->spi = x->id.spi; | |
2661 | id->family = x->props.family; | |
2662 | id->proto = x->id.proto; | |
2663 | ||
c0144bea | 2664 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2665 | err = -EMSGSIZE; |
c0144bea | 2666 | if (attr == NULL) |
1d1e34dd | 2667 | goto out_free_skb; |
c0144bea TG |
2668 | |
2669 | p = nla_data(attr); | |
0603eac0 | 2670 | } |
1d1e34dd DM |
2671 | err = copy_to_user_state_extra(x, p, skb); |
2672 | if (err) | |
2673 | goto out_free_skb; | |
26b15dad | 2674 | |
9825069d | 2675 | nlmsg_end(skb, nlh); |
26b15dad | 2676 | |
21ee543e | 2677 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad | 2678 | |
1d1e34dd | 2679 | out_free_skb: |
26b15dad | 2680 | kfree_skb(skb); |
1d1e34dd | 2681 | return err; |
26b15dad JHS |
2682 | } |
2683 | ||
214e005b | 2684 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2685 | { |
2686 | ||
2687 | switch (c->event) { | |
f60f6b8f | 2688 | case XFRM_MSG_EXPIRE: |
26b15dad | 2689 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2690 | case XFRM_MSG_NEWAE: |
2691 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2692 | case XFRM_MSG_DELSA: |
2693 | case XFRM_MSG_UPDSA: | |
2694 | case XFRM_MSG_NEWSA: | |
26b15dad | 2695 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2696 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2697 | return xfrm_notify_sa_flush(c); |
2698 | default: | |
62db5cfd | 2699 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2700 | c->event); | |
2701 | break; | |
26b15dad JHS |
2702 | } |
2703 | ||
2704 | return 0; | |
2705 | ||
2706 | } | |
2707 | ||
7deb2264 TG |
2708 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2709 | struct xfrm_policy *xp) | |
2710 | { | |
2711 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2712 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2713 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2714 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2715 | + userpolicy_type_attrsize(); | |
2716 | } | |
2717 | ||
1da177e4 | 2718 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
65e0736b | 2719 | struct xfrm_tmpl *xt, struct xfrm_policy *xp) |
1da177e4 | 2720 | { |
1d1e34dd | 2721 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2722 | struct xfrm_user_acquire *ua; |
2723 | struct nlmsghdr *nlh; | |
1d1e34dd | 2724 | int err; |
1da177e4 | 2725 | |
79b8b7f4 TG |
2726 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2727 | if (nlh == NULL) | |
2728 | return -EMSGSIZE; | |
1da177e4 | 2729 | |
7b67c857 | 2730 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2731 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2732 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2733 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
65e0736b | 2734 | copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); |
1da177e4 LT |
2735 | ua->aalgos = xt->aalgos; |
2736 | ua->ealgos = xt->ealgos; | |
2737 | ua->calgos = xt->calgos; | |
2738 | ua->seq = x->km.seq = seq; | |
2739 | ||
1d1e34dd DM |
2740 | err = copy_to_user_tmpl(xp, skb); |
2741 | if (!err) | |
2742 | err = copy_to_user_state_sec_ctx(x, skb); | |
2743 | if (!err) | |
2744 | err = copy_to_user_policy_type(xp->type, skb); | |
2745 | if (!err) | |
2746 | err = xfrm_mark_put(skb, &xp->mark); | |
2747 | if (err) { | |
2748 | nlmsg_cancel(skb, nlh); | |
2749 | return err; | |
2750 | } | |
1da177e4 | 2751 | |
053c095a JB |
2752 | nlmsg_end(skb, nlh); |
2753 | return 0; | |
1da177e4 LT |
2754 | } |
2755 | ||
2756 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
65e0736b | 2757 | struct xfrm_policy *xp) |
1da177e4 | 2758 | { |
a6483b79 | 2759 | struct net *net = xs_net(x); |
1da177e4 | 2760 | struct sk_buff *skb; |
1da177e4 | 2761 | |
7deb2264 | 2762 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2763 | if (skb == NULL) |
2764 | return -ENOMEM; | |
2765 | ||
65e0736b | 2766 | if (build_acquire(skb, x, xt, xp) < 0) |
1da177e4 LT |
2767 | BUG(); |
2768 | ||
21ee543e | 2769 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); |
1da177e4 LT |
2770 | } |
2771 | ||
2772 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2773 | * or more templates. | |
2774 | */ | |
cb969f07 | 2775 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2776 | u8 *data, int len, int *dir) |
2777 | { | |
fc34acd3 | 2778 | struct net *net = sock_net(sk); |
1da177e4 LT |
2779 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2780 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2781 | struct xfrm_policy *xp; | |
2782 | int nr; | |
2783 | ||
cb969f07 | 2784 | switch (sk->sk_family) { |
1da177e4 LT |
2785 | case AF_INET: |
2786 | if (opt != IP_XFRM_POLICY) { | |
2787 | *dir = -EOPNOTSUPP; | |
2788 | return NULL; | |
2789 | } | |
2790 | break; | |
dfd56b8b | 2791 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2792 | case AF_INET6: |
2793 | if (opt != IPV6_XFRM_POLICY) { | |
2794 | *dir = -EOPNOTSUPP; | |
2795 | return NULL; | |
2796 | } | |
2797 | break; | |
2798 | #endif | |
2799 | default: | |
2800 | *dir = -EINVAL; | |
2801 | return NULL; | |
2802 | } | |
2803 | ||
2804 | *dir = -EINVAL; | |
2805 | ||
2806 | if (len < sizeof(*p) || | |
2807 | verify_newpolicy_info(p)) | |
2808 | return NULL; | |
2809 | ||
2810 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2811 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2812 | return NULL; |
2813 | ||
a4f1bac6 HX |
2814 | if (p->dir > XFRM_POLICY_OUT) |
2815 | return NULL; | |
2816 | ||
2f09a4d5 | 2817 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2818 | if (xp == NULL) { |
2819 | *dir = -ENOBUFS; | |
2820 | return NULL; | |
2821 | } | |
2822 | ||
2823 | copy_from_user_policy(xp, p); | |
f7b6983f | 2824 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2825 | copy_templates(xp, ut, nr); |
2826 | ||
2827 | *dir = p->dir; | |
2828 | ||
2829 | return xp; | |
2830 | } | |
2831 | ||
7deb2264 TG |
2832 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2833 | { | |
2834 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2835 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2836 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2837 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2838 | + userpolicy_type_attrsize(); |
2839 | } | |
2840 | ||
1da177e4 | 2841 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2842 | int dir, const struct km_event *c) |
1da177e4 LT |
2843 | { |
2844 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2845 | int hard = c->data.hard; |
1d1e34dd DM |
2846 | struct nlmsghdr *nlh; |
2847 | int err; | |
1da177e4 | 2848 | |
15e47304 | 2849 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
79b8b7f4 TG |
2850 | if (nlh == NULL) |
2851 | return -EMSGSIZE; | |
1da177e4 | 2852 | |
7b67c857 | 2853 | upe = nlmsg_data(nlh); |
1da177e4 | 2854 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2855 | err = copy_to_user_tmpl(xp, skb); |
2856 | if (!err) | |
2857 | err = copy_to_user_sec_ctx(xp, skb); | |
2858 | if (!err) | |
2859 | err = copy_to_user_policy_type(xp->type, skb); | |
2860 | if (!err) | |
2861 | err = xfrm_mark_put(skb, &xp->mark); | |
2862 | if (err) { | |
2863 | nlmsg_cancel(skb, nlh); | |
2864 | return err; | |
2865 | } | |
1da177e4 LT |
2866 | upe->hard = !!hard; |
2867 | ||
053c095a JB |
2868 | nlmsg_end(skb, nlh); |
2869 | return 0; | |
1da177e4 LT |
2870 | } |
2871 | ||
214e005b | 2872 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2873 | { |
fc34acd3 | 2874 | struct net *net = xp_net(xp); |
1da177e4 | 2875 | struct sk_buff *skb; |
1da177e4 | 2876 | |
7deb2264 | 2877 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2878 | if (skb == NULL) |
2879 | return -ENOMEM; | |
2880 | ||
d51d081d | 2881 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2882 | BUG(); |
2883 | ||
21ee543e | 2884 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2885 | } |
2886 | ||
214e005b | 2887 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2888 | { |
1d1e34dd | 2889 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2890 | struct net *net = xp_net(xp); |
26b15dad | 2891 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2892 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2893 | struct nlmsghdr *nlh; |
2894 | struct sk_buff *skb; | |
1d1e34dd | 2895 | int headlen, err; |
0603eac0 HX |
2896 | |
2897 | headlen = sizeof(*p); | |
2898 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2899 | len += nla_total_size(headlen); |
0603eac0 HX |
2900 | headlen = sizeof(*id); |
2901 | } | |
cfbfd45a | 2902 | len += userpolicy_type_attrsize(); |
295fae56 | 2903 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2904 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2905 | |
7deb2264 | 2906 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2907 | if (skb == NULL) |
2908 | return -ENOMEM; | |
26b15dad | 2909 | |
15e47304 | 2910 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2911 | err = -EMSGSIZE; |
79b8b7f4 | 2912 | if (nlh == NULL) |
1d1e34dd | 2913 | goto out_free_skb; |
26b15dad | 2914 | |
7b67c857 | 2915 | p = nlmsg_data(nlh); |
0603eac0 | 2916 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2917 | struct nlattr *attr; |
2918 | ||
7b67c857 | 2919 | id = nlmsg_data(nlh); |
0603eac0 HX |
2920 | memset(id, 0, sizeof(*id)); |
2921 | id->dir = dir; | |
2922 | if (c->data.byid) | |
2923 | id->index = xp->index; | |
2924 | else | |
2925 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2926 | ||
c0144bea | 2927 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2928 | err = -EMSGSIZE; |
c0144bea | 2929 | if (attr == NULL) |
1d1e34dd | 2930 | goto out_free_skb; |
c0144bea TG |
2931 | |
2932 | p = nla_data(attr); | |
0603eac0 | 2933 | } |
26b15dad | 2934 | |
26b15dad | 2935 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2936 | err = copy_to_user_tmpl(xp, skb); |
2937 | if (!err) | |
2938 | err = copy_to_user_policy_type(xp->type, skb); | |
2939 | if (!err) | |
2940 | err = xfrm_mark_put(skb, &xp->mark); | |
2941 | if (err) | |
2942 | goto out_free_skb; | |
295fae56 | 2943 | |
9825069d | 2944 | nlmsg_end(skb, nlh); |
26b15dad | 2945 | |
21ee543e | 2946 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2947 | |
1d1e34dd | 2948 | out_free_skb: |
26b15dad | 2949 | kfree_skb(skb); |
1d1e34dd | 2950 | return err; |
26b15dad JHS |
2951 | } |
2952 | ||
214e005b | 2953 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2954 | { |
7067802e | 2955 | struct net *net = c->net; |
26b15dad JHS |
2956 | struct nlmsghdr *nlh; |
2957 | struct sk_buff *skb; | |
1d1e34dd | 2958 | int err; |
26b15dad | 2959 | |
7deb2264 | 2960 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2961 | if (skb == NULL) |
2962 | return -ENOMEM; | |
26b15dad | 2963 | |
15e47304 | 2964 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2965 | err = -EMSGSIZE; |
79b8b7f4 | 2966 | if (nlh == NULL) |
1d1e34dd DM |
2967 | goto out_free_skb; |
2968 | err = copy_to_user_policy_type(c->data.type, skb); | |
2969 | if (err) | |
2970 | goto out_free_skb; | |
26b15dad | 2971 | |
9825069d | 2972 | nlmsg_end(skb, nlh); |
26b15dad | 2973 | |
21ee543e | 2974 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2975 | |
1d1e34dd | 2976 | out_free_skb: |
26b15dad | 2977 | kfree_skb(skb); |
1d1e34dd | 2978 | return err; |
26b15dad JHS |
2979 | } |
2980 | ||
214e005b | 2981 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2982 | { |
2983 | ||
2984 | switch (c->event) { | |
f60f6b8f HX |
2985 | case XFRM_MSG_NEWPOLICY: |
2986 | case XFRM_MSG_UPDPOLICY: | |
2987 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2988 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2989 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2990 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2991 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2992 | return xfrm_exp_policy_notify(xp, dir, c); |
2993 | default: | |
62db5cfd | 2994 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2995 | c->event); | |
26b15dad JHS |
2996 | } |
2997 | ||
2998 | return 0; | |
2999 | ||
3000 | } | |
3001 | ||
7deb2264 TG |
3002 | static inline size_t xfrm_report_msgsize(void) |
3003 | { | |
3004 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
3005 | } | |
3006 | ||
97a64b45 MN |
3007 | static int build_report(struct sk_buff *skb, u8 proto, |
3008 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
3009 | { | |
3010 | struct xfrm_user_report *ur; | |
3011 | struct nlmsghdr *nlh; | |
97a64b45 | 3012 | |
79b8b7f4 TG |
3013 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
3014 | if (nlh == NULL) | |
3015 | return -EMSGSIZE; | |
97a64b45 | 3016 | |
7b67c857 | 3017 | ur = nlmsg_data(nlh); |
97a64b45 MN |
3018 | ur->proto = proto; |
3019 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
3020 | ||
1d1e34dd DM |
3021 | if (addr) { |
3022 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
3023 | if (err) { | |
3024 | nlmsg_cancel(skb, nlh); | |
3025 | return err; | |
3026 | } | |
3027 | } | |
053c095a JB |
3028 | nlmsg_end(skb, nlh); |
3029 | return 0; | |
97a64b45 MN |
3030 | } |
3031 | ||
db983c11 AD |
3032 | static int xfrm_send_report(struct net *net, u8 proto, |
3033 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
3034 | { |
3035 | struct sk_buff *skb; | |
97a64b45 | 3036 | |
7deb2264 | 3037 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
3038 | if (skb == NULL) |
3039 | return -ENOMEM; | |
3040 | ||
3041 | if (build_report(skb, proto, sel, addr) < 0) | |
3042 | BUG(); | |
3043 | ||
21ee543e | 3044 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); |
97a64b45 MN |
3045 | } |
3046 | ||
3a2dfbe8 MW |
3047 | static inline size_t xfrm_mapping_msgsize(void) |
3048 | { | |
3049 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
3050 | } | |
3051 | ||
3052 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
3053 | xfrm_address_t *new_saddr, __be16 new_sport) | |
3054 | { | |
3055 | struct xfrm_user_mapping *um; | |
3056 | struct nlmsghdr *nlh; | |
3057 | ||
3058 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
3059 | if (nlh == NULL) | |
3060 | return -EMSGSIZE; | |
3061 | ||
3062 | um = nlmsg_data(nlh); | |
3063 | ||
3064 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
3065 | um->id.spi = x->id.spi; | |
3066 | um->id.family = x->props.family; | |
3067 | um->id.proto = x->id.proto; | |
3068 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
3069 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
3070 | um->new_sport = new_sport; | |
3071 | um->old_sport = x->encap->encap_sport; | |
3072 | um->reqid = x->props.reqid; | |
3073 | ||
053c095a JB |
3074 | nlmsg_end(skb, nlh); |
3075 | return 0; | |
3a2dfbe8 MW |
3076 | } |
3077 | ||
3078 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
3079 | __be16 sport) | |
3080 | { | |
a6483b79 | 3081 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
3082 | struct sk_buff *skb; |
3083 | ||
3084 | if (x->id.proto != IPPROTO_ESP) | |
3085 | return -EINVAL; | |
3086 | ||
3087 | if (!x->encap) | |
3088 | return -EINVAL; | |
3089 | ||
3090 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
3091 | if (skb == NULL) | |
3092 | return -ENOMEM; | |
3093 | ||
3094 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
3095 | BUG(); | |
3096 | ||
21ee543e | 3097 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); |
3a2dfbe8 MW |
3098 | } |
3099 | ||
0f24558e HG |
3100 | static bool xfrm_is_alive(const struct km_event *c) |
3101 | { | |
3102 | return (bool)xfrm_acquire_is_on(c->net); | |
3103 | } | |
3104 | ||
1da177e4 LT |
3105 | static struct xfrm_mgr netlink_mgr = { |
3106 | .id = "netlink", | |
3107 | .notify = xfrm_send_state_notify, | |
3108 | .acquire = xfrm_send_acquire, | |
3109 | .compile_policy = xfrm_compile_policy, | |
3110 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 3111 | .report = xfrm_send_report, |
5c79de6e | 3112 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 3113 | .new_mapping = xfrm_send_mapping, |
0f24558e | 3114 | .is_alive = xfrm_is_alive, |
1da177e4 LT |
3115 | }; |
3116 | ||
a6483b79 | 3117 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 3118 | { |
be33690d | 3119 | struct sock *nlsk; |
a31f2d17 PNA |
3120 | struct netlink_kernel_cfg cfg = { |
3121 | .groups = XFRMNLGRP_MAX, | |
3122 | .input = xfrm_netlink_rcv, | |
3123 | }; | |
be33690d | 3124 | |
9f00d977 | 3125 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); |
be33690d | 3126 | if (nlsk == NULL) |
1da177e4 | 3127 | return -ENOMEM; |
d79d792e | 3128 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 3129 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
3130 | return 0; |
3131 | } | |
3132 | ||
d79d792e | 3133 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 3134 | { |
d79d792e EB |
3135 | struct net *net; |
3136 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 3137 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
3138 | synchronize_net(); |
3139 | list_for_each_entry(net, net_exit_list, exit_list) | |
3140 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
3141 | } |
3142 | ||
a6483b79 | 3143 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
3144 | .init = xfrm_user_net_init, |
3145 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
3146 | }; |
3147 | ||
3148 | static int __init xfrm_user_init(void) | |
3149 | { | |
3150 | int rv; | |
3151 | ||
3152 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
3153 | ||
3154 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3155 | if (rv < 0) | |
3156 | return rv; | |
3157 | rv = xfrm_register_km(&netlink_mgr); | |
3158 | if (rv < 0) | |
3159 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3160 | return rv; | |
3161 | } | |
3162 | ||
3163 | static void __exit xfrm_user_exit(void) | |
3164 | { | |
3165 | xfrm_unregister_km(&netlink_mgr); | |
3166 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3167 | } | |
3168 | ||
1da177e4 LT |
3169 | module_init(xfrm_user_init); |
3170 | module_exit(xfrm_user_exit); | |
3171 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3172 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3173 |