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) { | |
812 | ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused); | |
813 | if (ret) | |
814 | goto out; | |
815 | } | |
816 | if (x->aead) { | |
817 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
818 | if (ret) | |
819 | goto out; | |
820 | } | |
821 | if (x->aalg) { | |
822 | ret = copy_to_user_auth(x->aalg, skb); | |
823 | if (!ret) | |
824 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, | |
825 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
826 | if (ret) | |
827 | goto out; | |
828 | } | |
829 | if (x->ealg) { | |
830 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); | |
831 | if (ret) | |
832 | goto out; | |
833 | } | |
834 | if (x->calg) { | |
835 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); | |
836 | if (ret) | |
837 | goto out; | |
838 | } | |
839 | if (x->encap) { | |
840 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); | |
841 | if (ret) | |
842 | goto out; | |
843 | } | |
844 | if (x->tfcpad) { | |
845 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); | |
846 | if (ret) | |
847 | goto out; | |
848 | } | |
849 | ret = xfrm_mark_put(skb, &x->mark); | |
850 | if (ret) | |
851 | goto out; | |
f293a5e3 | 852 | if (x->replay_esn) |
1d1e34dd DM |
853 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
854 | xfrm_replay_state_esn_len(x->replay_esn), | |
855 | x->replay_esn); | |
f293a5e3 | 856 | else |
857 | ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), | |
858 | &x->replay); | |
859 | if (ret) | |
860 | goto out; | |
1d1e34dd DM |
861 | if (x->security) |
862 | ret = copy_sec_ctx(x->security, skb); | |
863 | out: | |
864 | return ret; | |
68325d3b HX |
865 | } |
866 | ||
867 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
868 | { | |
869 | struct xfrm_dump_info *sp = ptr; | |
870 | struct sk_buff *in_skb = sp->in_skb; | |
871 | struct sk_buff *skb = sp->out_skb; | |
872 | struct xfrm_usersa_info *p; | |
873 | struct nlmsghdr *nlh; | |
874 | int err; | |
875 | ||
15e47304 | 876 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
68325d3b HX |
877 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
878 | if (nlh == NULL) | |
879 | return -EMSGSIZE; | |
880 | ||
881 | p = nlmsg_data(nlh); | |
882 | ||
883 | err = copy_to_user_state_extra(x, p, skb); | |
1d1e34dd DM |
884 | if (err) { |
885 | nlmsg_cancel(skb, nlh); | |
886 | return err; | |
887 | } | |
9825069d | 888 | nlmsg_end(skb, nlh); |
1da177e4 | 889 | return 0; |
1da177e4 LT |
890 | } |
891 | ||
4c563f76 TT |
892 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
893 | { | |
894 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
283bc9f3 FD |
895 | struct sock *sk = cb->skb->sk; |
896 | struct net *net = sock_net(sk); | |
897 | ||
898 | xfrm_state_walk_done(walk, net); | |
4c563f76 TT |
899 | return 0; |
900 | } | |
901 | ||
d3623099 | 902 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
1da177e4 LT |
903 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
904 | { | |
fc34acd3 | 905 | struct net *net = sock_net(skb->sk); |
4c563f76 | 906 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
907 | struct xfrm_dump_info info; |
908 | ||
4c563f76 TT |
909 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
910 | sizeof(cb->args) - sizeof(cb->args[0])); | |
911 | ||
1da177e4 LT |
912 | info.in_skb = cb->skb; |
913 | info.out_skb = skb; | |
914 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
915 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
916 | |
917 | if (!cb->args[0]) { | |
d3623099 | 918 | struct nlattr *attrs[XFRMA_MAX+1]; |
870a2df4 | 919 | struct xfrm_address_filter *filter = NULL; |
d3623099 ND |
920 | u8 proto = 0; |
921 | int err; | |
922 | ||
4c563f76 | 923 | cb->args[0] = 1; |
d3623099 ND |
924 | |
925 | err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, | |
926 | xfrma_policy); | |
927 | if (err < 0) | |
928 | return err; | |
929 | ||
870a2df4 | 930 | if (attrs[XFRMA_ADDRESS_FILTER]) { |
df367561 AH |
931 | filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), |
932 | sizeof(*filter), GFP_KERNEL); | |
d3623099 ND |
933 | if (filter == NULL) |
934 | return -ENOMEM; | |
d3623099 ND |
935 | } |
936 | ||
937 | if (attrs[XFRMA_PROTO]) | |
938 | proto = nla_get_u8(attrs[XFRMA_PROTO]); | |
939 | ||
940 | xfrm_state_walk_init(walk, proto, filter); | |
4c563f76 TT |
941 | } |
942 | ||
fc34acd3 | 943 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
944 | |
945 | return skb->len; | |
946 | } | |
947 | ||
948 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
949 | struct xfrm_state *x, u32 seq) | |
950 | { | |
951 | struct xfrm_dump_info info; | |
952 | struct sk_buff *skb; | |
864745d2 | 953 | int err; |
1da177e4 | 954 | |
7deb2264 | 955 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
956 | if (!skb) |
957 | return ERR_PTR(-ENOMEM); | |
958 | ||
1da177e4 LT |
959 | info.in_skb = in_skb; |
960 | info.out_skb = skb; | |
961 | info.nlmsg_seq = seq; | |
962 | info.nlmsg_flags = 0; | |
1da177e4 | 963 | |
864745d2 MK |
964 | err = dump_one_state(x, 0, &info); |
965 | if (err) { | |
1da177e4 | 966 | kfree_skb(skb); |
864745d2 | 967 | return ERR_PTR(err); |
1da177e4 LT |
968 | } |
969 | ||
970 | return skb; | |
971 | } | |
972 | ||
21ee543e MK |
973 | /* A wrapper for nlmsg_multicast() checking that nlsk is still available. |
974 | * Must be called with RCU read lock. | |
975 | */ | |
976 | static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, | |
977 | u32 pid, unsigned int group) | |
978 | { | |
979 | struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); | |
980 | ||
981 | if (nlsk) | |
982 | return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); | |
983 | else | |
984 | return -1; | |
985 | } | |
986 | ||
7deb2264 TG |
987 | static inline size_t xfrm_spdinfo_msgsize(void) |
988 | { | |
989 | return NLMSG_ALIGN(4) | |
990 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
880a6fab CG |
991 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)) |
992 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)) | |
993 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)); | |
7deb2264 TG |
994 | } |
995 | ||
e071041b | 996 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 997 | u32 portid, u32 seq, u32 flags) |
ecfd6b18 | 998 | { |
5a6d3416 JHS |
999 | struct xfrmk_spdinfo si; |
1000 | struct xfrmu_spdinfo spc; | |
1001 | struct xfrmu_spdhinfo sph; | |
880a6fab | 1002 | struct xfrmu_spdhthresh spt4, spt6; |
ecfd6b18 | 1003 | struct nlmsghdr *nlh; |
1d1e34dd | 1004 | int err; |
ecfd6b18 | 1005 | u32 *f; |
880a6fab | 1006 | unsigned lseq; |
ecfd6b18 | 1007 | |
15e47304 | 1008 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
25985edc | 1009 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
1010 | return -EMSGSIZE; |
1011 | ||
1012 | f = nlmsg_data(nlh); | |
1013 | *f = flags; | |
e071041b | 1014 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
1015 | spc.incnt = si.incnt; |
1016 | spc.outcnt = si.outcnt; | |
1017 | spc.fwdcnt = si.fwdcnt; | |
1018 | spc.inscnt = si.inscnt; | |
1019 | spc.outscnt = si.outscnt; | |
1020 | spc.fwdscnt = si.fwdscnt; | |
1021 | sph.spdhcnt = si.spdhcnt; | |
1022 | sph.spdhmcnt = si.spdhmcnt; | |
1023 | ||
880a6fab CG |
1024 | do { |
1025 | lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); | |
1026 | ||
1027 | spt4.lbits = net->xfrm.policy_hthresh.lbits4; | |
1028 | spt4.rbits = net->xfrm.policy_hthresh.rbits4; | |
1029 | spt6.lbits = net->xfrm.policy_hthresh.lbits6; | |
1030 | spt6.rbits = net->xfrm.policy_hthresh.rbits6; | |
1031 | } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); | |
1032 | ||
1d1e34dd DM |
1033 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
1034 | if (!err) | |
1035 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
880a6fab CG |
1036 | if (!err) |
1037 | err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); | |
1038 | if (!err) | |
1039 | err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); | |
1d1e34dd DM |
1040 | if (err) { |
1041 | nlmsg_cancel(skb, nlh); | |
1042 | return err; | |
1043 | } | |
ecfd6b18 | 1044 | |
053c095a JB |
1045 | nlmsg_end(skb, nlh); |
1046 | return 0; | |
ecfd6b18 JHS |
1047 | } |
1048 | ||
880a6fab CG |
1049 | static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
1050 | struct nlattr **attrs) | |
1051 | { | |
1052 | struct net *net = sock_net(skb->sk); | |
1053 | struct xfrmu_spdhthresh *thresh4 = NULL; | |
1054 | struct xfrmu_spdhthresh *thresh6 = NULL; | |
1055 | ||
1056 | /* selector prefixlen thresholds to hash policies */ | |
1057 | if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { | |
1058 | struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; | |
1059 | ||
1060 | if (nla_len(rta) < sizeof(*thresh4)) | |
1061 | return -EINVAL; | |
1062 | thresh4 = nla_data(rta); | |
1063 | if (thresh4->lbits > 32 || thresh4->rbits > 32) | |
1064 | return -EINVAL; | |
1065 | } | |
1066 | if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { | |
1067 | struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; | |
1068 | ||
1069 | if (nla_len(rta) < sizeof(*thresh6)) | |
1070 | return -EINVAL; | |
1071 | thresh6 = nla_data(rta); | |
1072 | if (thresh6->lbits > 128 || thresh6->rbits > 128) | |
1073 | return -EINVAL; | |
1074 | } | |
1075 | ||
1076 | if (thresh4 || thresh6) { | |
1077 | write_seqlock(&net->xfrm.policy_hthresh.lock); | |
1078 | if (thresh4) { | |
1079 | net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; | |
1080 | net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; | |
1081 | } | |
1082 | if (thresh6) { | |
1083 | net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; | |
1084 | net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; | |
1085 | } | |
1086 | write_sequnlock(&net->xfrm.policy_hthresh.lock); | |
1087 | ||
1088 | xfrm_policy_hash_rebuild(net); | |
1089 | } | |
1090 | ||
1091 | return 0; | |
1092 | } | |
1093 | ||
ecfd6b18 | 1094 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1095 | struct nlattr **attrs) |
ecfd6b18 | 1096 | { |
a6483b79 | 1097 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 1098 | struct sk_buff *r_skb; |
7b67c857 | 1099 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1100 | u32 sportid = NETLINK_CB(skb).portid; |
ecfd6b18 | 1101 | u32 seq = nlh->nlmsg_seq; |
ecfd6b18 | 1102 | |
7deb2264 | 1103 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
1104 | if (r_skb == NULL) |
1105 | return -ENOMEM; | |
1106 | ||
15e47304 | 1107 | if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) |
ecfd6b18 JHS |
1108 | BUG(); |
1109 | ||
15e47304 | 1110 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
ecfd6b18 JHS |
1111 | } |
1112 | ||
7deb2264 TG |
1113 | static inline size_t xfrm_sadinfo_msgsize(void) |
1114 | { | |
1115 | return NLMSG_ALIGN(4) | |
1116 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
1117 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
1118 | } | |
1119 | ||
e071041b | 1120 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
15e47304 | 1121 | u32 portid, u32 seq, u32 flags) |
28d8909b | 1122 | { |
af11e316 JHS |
1123 | struct xfrmk_sadinfo si; |
1124 | struct xfrmu_sadhinfo sh; | |
28d8909b | 1125 | struct nlmsghdr *nlh; |
1d1e34dd | 1126 | int err; |
28d8909b JHS |
1127 | u32 *f; |
1128 | ||
15e47304 | 1129 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
25985edc | 1130 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
1131 | return -EMSGSIZE; |
1132 | ||
1133 | f = nlmsg_data(nlh); | |
1134 | *f = flags; | |
e071041b | 1135 | xfrm_sad_getinfo(net, &si); |
28d8909b | 1136 | |
af11e316 JHS |
1137 | sh.sadhmcnt = si.sadhmcnt; |
1138 | sh.sadhcnt = si.sadhcnt; | |
1139 | ||
1d1e34dd DM |
1140 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
1141 | if (!err) | |
1142 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
1143 | if (err) { | |
1144 | nlmsg_cancel(skb, nlh); | |
1145 | return err; | |
1146 | } | |
28d8909b | 1147 | |
053c095a JB |
1148 | nlmsg_end(skb, nlh); |
1149 | return 0; | |
28d8909b JHS |
1150 | } |
1151 | ||
1152 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1153 | struct nlattr **attrs) |
28d8909b | 1154 | { |
a6483b79 | 1155 | struct net *net = sock_net(skb->sk); |
28d8909b | 1156 | struct sk_buff *r_skb; |
7b67c857 | 1157 | u32 *flags = nlmsg_data(nlh); |
15e47304 | 1158 | u32 sportid = NETLINK_CB(skb).portid; |
28d8909b | 1159 | u32 seq = nlh->nlmsg_seq; |
28d8909b | 1160 | |
7deb2264 | 1161 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
1162 | if (r_skb == NULL) |
1163 | return -ENOMEM; | |
1164 | ||
15e47304 | 1165 | if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) |
28d8909b JHS |
1166 | BUG(); |
1167 | ||
15e47304 | 1168 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
28d8909b JHS |
1169 | } |
1170 | ||
22e70050 | 1171 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1172 | struct nlattr **attrs) |
1da177e4 | 1173 | { |
fc34acd3 | 1174 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1175 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1176 | struct xfrm_state *x; |
1177 | struct sk_buff *resp_skb; | |
eb2971b6 | 1178 | int err = -ESRCH; |
1da177e4 | 1179 | |
fc34acd3 | 1180 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1181 | if (x == NULL) |
1182 | goto out_noput; | |
1183 | ||
1184 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1185 | if (IS_ERR(resp_skb)) { | |
1186 | err = PTR_ERR(resp_skb); | |
1187 | } else { | |
15e47304 | 1188 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1189 | } |
1190 | xfrm_state_put(x); | |
1191 | out_noput: | |
1192 | return err; | |
1193 | } | |
1194 | ||
22e70050 | 1195 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1196 | struct nlattr **attrs) |
1da177e4 | 1197 | { |
fc34acd3 | 1198 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1199 | struct xfrm_state *x; |
1200 | struct xfrm_userspi_info *p; | |
1201 | struct sk_buff *resp_skb; | |
1202 | xfrm_address_t *daddr; | |
1203 | int family; | |
1204 | int err; | |
6f26b61e JHS |
1205 | u32 mark; |
1206 | struct xfrm_mark m; | |
1da177e4 | 1207 | |
7b67c857 | 1208 | p = nlmsg_data(nlh); |
776e9dd9 | 1209 | err = verify_spi_info(p->info.id.proto, p->min, p->max); |
1da177e4 LT |
1210 | if (err) |
1211 | goto out_noput; | |
1212 | ||
1213 | family = p->info.family; | |
1214 | daddr = &p->info.id.daddr; | |
1215 | ||
1216 | x = NULL; | |
6f26b61e JHS |
1217 | |
1218 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1219 | if (p->info.seq) { |
6f26b61e | 1220 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
70e94e66 | 1221 | if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { |
1da177e4 LT |
1222 | xfrm_state_put(x); |
1223 | x = NULL; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | if (!x) | |
6f26b61e | 1228 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1229 | p->info.id.proto, daddr, |
1230 | &p->info.saddr, 1, | |
1231 | family); | |
1232 | err = -ENOENT; | |
1233 | if (x == NULL) | |
1234 | goto out_noput; | |
1235 | ||
658b219e HX |
1236 | err = xfrm_alloc_spi(x, p->min, p->max); |
1237 | if (err) | |
1238 | goto out; | |
1da177e4 | 1239 | |
658b219e | 1240 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1241 | if (IS_ERR(resp_skb)) { |
1242 | err = PTR_ERR(resp_skb); | |
1243 | goto out; | |
1244 | } | |
1245 | ||
15e47304 | 1246 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
1da177e4 LT |
1247 | |
1248 | out: | |
1249 | xfrm_state_put(x); | |
1250 | out_noput: | |
1251 | return err; | |
1252 | } | |
1253 | ||
b798a9ed | 1254 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1255 | { |
1256 | switch (dir) { | |
1257 | case XFRM_POLICY_IN: | |
1258 | case XFRM_POLICY_OUT: | |
1259 | case XFRM_POLICY_FWD: | |
1260 | break; | |
1261 | ||
1262 | default: | |
1263 | return -EINVAL; | |
3ff50b79 | 1264 | } |
1da177e4 LT |
1265 | |
1266 | return 0; | |
1267 | } | |
1268 | ||
b798a9ed | 1269 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1270 | { |
1271 | switch (type) { | |
1272 | case XFRM_POLICY_TYPE_MAIN: | |
1273 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1274 | case XFRM_POLICY_TYPE_SUB: | |
1275 | #endif | |
1276 | break; | |
1277 | ||
1278 | default: | |
1279 | return -EINVAL; | |
3ff50b79 | 1280 | } |
f7b6983f MN |
1281 | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1da177e4 LT |
1285 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1286 | { | |
e682adf0 FD |
1287 | int ret; |
1288 | ||
1da177e4 LT |
1289 | switch (p->share) { |
1290 | case XFRM_SHARE_ANY: | |
1291 | case XFRM_SHARE_SESSION: | |
1292 | case XFRM_SHARE_USER: | |
1293 | case XFRM_SHARE_UNIQUE: | |
1294 | break; | |
1295 | ||
1296 | default: | |
1297 | return -EINVAL; | |
3ff50b79 | 1298 | } |
1da177e4 LT |
1299 | |
1300 | switch (p->action) { | |
1301 | case XFRM_POLICY_ALLOW: | |
1302 | case XFRM_POLICY_BLOCK: | |
1303 | break; | |
1304 | ||
1305 | default: | |
1306 | return -EINVAL; | |
3ff50b79 | 1307 | } |
1da177e4 LT |
1308 | |
1309 | switch (p->sel.family) { | |
1310 | case AF_INET: | |
1311 | break; | |
1312 | ||
1313 | case AF_INET6: | |
dfd56b8b | 1314 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
1315 | break; |
1316 | #else | |
1317 | return -EAFNOSUPPORT; | |
1318 | #endif | |
1319 | ||
1320 | default: | |
1321 | return -EINVAL; | |
3ff50b79 | 1322 | } |
1da177e4 | 1323 | |
e682adf0 FD |
1324 | ret = verify_policy_dir(p->dir); |
1325 | if (ret) | |
1326 | return ret; | |
1327 | if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir)) | |
1328 | return -EINVAL; | |
1329 | ||
1330 | return 0; | |
1da177e4 LT |
1331 | } |
1332 | ||
5424f32e | 1333 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1334 | { |
5424f32e | 1335 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1336 | struct xfrm_user_sec_ctx *uctx; |
1337 | ||
1338 | if (!rt) | |
1339 | return 0; | |
1340 | ||
5424f32e | 1341 | uctx = nla_data(rt); |
52a4c640 | 1342 | return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); |
df71837d TJ |
1343 | } |
1344 | ||
1da177e4 LT |
1345 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1346 | int nr) | |
1347 | { | |
1348 | int i; | |
1349 | ||
1350 | xp->xfrm_nr = nr; | |
1351 | for (i = 0; i < nr; i++, ut++) { | |
1352 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1353 | ||
1354 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1355 | memcpy(&t->saddr, &ut->saddr, | |
1356 | sizeof(xfrm_address_t)); | |
1357 | t->reqid = ut->reqid; | |
1358 | t->mode = ut->mode; | |
1359 | t->share = ut->share; | |
1360 | t->optional = ut->optional; | |
1361 | t->aalgos = ut->aalgos; | |
1362 | t->ealgos = ut->ealgos; | |
1363 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1364 | /* If all masks are ~0, then we allow all algorithms. */ |
1365 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1366 | t->encap_family = ut->family; |
1da177e4 LT |
1367 | } |
1368 | } | |
1369 | ||
b4ad86bf DM |
1370 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1371 | { | |
1372 | int i; | |
1373 | ||
1374 | if (nr > XFRM_MAX_DEPTH) | |
1375 | return -EINVAL; | |
1376 | ||
1377 | for (i = 0; i < nr; i++) { | |
1378 | /* We never validated the ut->family value, so many | |
1379 | * applications simply leave it at zero. The check was | |
1380 | * never made and ut->family was ignored because all | |
1381 | * templates could be assumed to have the same family as | |
1382 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1383 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1384 | */ | |
1385 | if (!ut[i].family) | |
1386 | ut[i].family = family; | |
1387 | ||
1388 | switch (ut[i].family) { | |
1389 | case AF_INET: | |
1390 | break; | |
dfd56b8b | 1391 | #if IS_ENABLED(CONFIG_IPV6) |
b4ad86bf DM |
1392 | case AF_INET6: |
1393 | break; | |
1394 | #endif | |
1395 | default: | |
1396 | return -EINVAL; | |
3ff50b79 | 1397 | } |
b4ad86bf DM |
1398 | } |
1399 | ||
1400 | return 0; | |
1401 | } | |
1402 | ||
5424f32e | 1403 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1404 | { |
5424f32e | 1405 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1406 | |
1407 | if (!rt) { | |
1408 | pol->xfrm_nr = 0; | |
1409 | } else { | |
5424f32e TG |
1410 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1411 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1412 | int err; |
1da177e4 | 1413 | |
b4ad86bf DM |
1414 | err = validate_tmpl(nr, utmpl, pol->family); |
1415 | if (err) | |
1416 | return err; | |
1da177e4 | 1417 | |
5424f32e | 1418 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1419 | } |
1420 | return 0; | |
1421 | } | |
1422 | ||
5424f32e | 1423 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1424 | { |
5424f32e | 1425 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1426 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1427 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1428 | int err; |
1429 | ||
1430 | if (rt) { | |
5424f32e | 1431 | upt = nla_data(rt); |
f7b6983f MN |
1432 | type = upt->type; |
1433 | } | |
1434 | ||
1435 | err = verify_policy_type(type); | |
1436 | if (err) | |
1437 | return err; | |
1438 | ||
1439 | *tp = type; | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1da177e4 LT |
1443 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1444 | { | |
1445 | xp->priority = p->priority; | |
1446 | xp->index = p->index; | |
1447 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1448 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1449 | xp->action = p->action; | |
1450 | xp->flags = p->flags; | |
1451 | xp->family = p->sel.family; | |
1452 | /* XXX xp->share = p->share; */ | |
1453 | } | |
1454 | ||
1455 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1456 | { | |
7b789836 | 1457 | memset(p, 0, sizeof(*p)); |
1da177e4 LT |
1458 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
1459 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1460 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1461 | p->priority = xp->priority; | |
1462 | p->index = xp->index; | |
1463 | p->sel.family = xp->family; | |
1464 | p->dir = dir; | |
1465 | p->action = xp->action; | |
1466 | p->flags = xp->flags; | |
1467 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1468 | } | |
1469 | ||
fc34acd3 | 1470 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1471 | { |
fc34acd3 | 1472 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1473 | int err; |
1474 | ||
1475 | if (!xp) { | |
1476 | *errp = -ENOMEM; | |
1477 | return NULL; | |
1478 | } | |
1479 | ||
1480 | copy_from_user_policy(xp, p); | |
df71837d | 1481 | |
35a7aa08 | 1482 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1483 | if (err) |
1484 | goto error; | |
1485 | ||
35a7aa08 TG |
1486 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1487 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1488 | if (err) |
1489 | goto error; | |
1da177e4 | 1490 | |
295fae56 JHS |
1491 | xfrm_mark_get(attrs, &xp->mark); |
1492 | ||
1da177e4 | 1493 | return xp; |
f7b6983f MN |
1494 | error: |
1495 | *errp = err; | |
12a169e7 | 1496 | xp->walk.dead = 1; |
64c31b3f | 1497 | xfrm_policy_destroy(xp); |
f7b6983f | 1498 | return NULL; |
1da177e4 LT |
1499 | } |
1500 | ||
22e70050 | 1501 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1502 | struct nlattr **attrs) |
1da177e4 | 1503 | { |
fc34acd3 | 1504 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1505 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1506 | struct xfrm_policy *xp; |
26b15dad | 1507 | struct km_event c; |
1da177e4 LT |
1508 | int err; |
1509 | int excl; | |
1510 | ||
1511 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1512 | if (err) |
1513 | return err; | |
35a7aa08 | 1514 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1515 | if (err) |
1516 | return err; | |
1517 | ||
fc34acd3 | 1518 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1519 | if (!xp) |
1520 | return err; | |
1521 | ||
25985edc | 1522 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1523 | * Aha! this is anti-netlink really i.e more pfkey derived |
1524 | * in netlink excl is a flag and you wouldnt need | |
1525 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1526 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1527 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2e71029e | 1528 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
161a09e7 | 1529 | |
1da177e4 | 1530 | if (err) { |
03e1ad7b | 1531 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1532 | kfree(xp); |
1533 | return err; | |
1534 | } | |
1535 | ||
f60f6b8f | 1536 | c.event = nlh->nlmsg_type; |
26b15dad | 1537 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1538 | c.portid = nlh->nlmsg_pid; |
26b15dad JHS |
1539 | km_policy_notify(xp, p->dir, &c); |
1540 | ||
1da177e4 LT |
1541 | xfrm_pol_put(xp); |
1542 | ||
1543 | return 0; | |
1544 | } | |
1545 | ||
1546 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1547 | { | |
1548 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1549 | int i; | |
1550 | ||
1551 | if (xp->xfrm_nr == 0) | |
1552 | return 0; | |
1553 | ||
1554 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1555 | struct xfrm_user_tmpl *up = &vec[i]; | |
1556 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1557 | ||
1f86840f | 1558 | memset(up, 0, sizeof(*up)); |
1da177e4 | 1559 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
8511d01d | 1560 | up->family = kp->encap_family; |
1da177e4 LT |
1561 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1562 | up->reqid = kp->reqid; | |
1563 | up->mode = kp->mode; | |
1564 | up->share = kp->share; | |
1565 | up->optional = kp->optional; | |
1566 | up->aalgos = kp->aalgos; | |
1567 | up->ealgos = kp->ealgos; | |
1568 | up->calgos = kp->calgos; | |
1569 | } | |
df71837d | 1570 | |
c0144bea TG |
1571 | return nla_put(skb, XFRMA_TMPL, |
1572 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1573 | } |
1574 | ||
1575 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1576 | { | |
1577 | if (x->security) { | |
1578 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1579 | } |
1580 | return 0; | |
0d681623 | 1581 | } |
df71837d | 1582 | |
0d681623 SH |
1583 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1584 | { | |
1d1e34dd | 1585 | if (xp->security) |
0d681623 | 1586 | return copy_sec_ctx(xp->security, skb); |
0d681623 | 1587 | return 0; |
df71837d | 1588 | } |
cfbfd45a TG |
1589 | static inline size_t userpolicy_type_attrsize(void) |
1590 | { | |
1591 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1592 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1593 | #else | |
1594 | return 0; | |
1595 | #endif | |
1596 | } | |
df71837d | 1597 | |
f7b6983f | 1598 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1599 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1600 | { |
c0144bea TG |
1601 | struct xfrm_userpolicy_type upt = { |
1602 | .type = type, | |
1603 | }; | |
f7b6983f | 1604 | |
c0144bea | 1605 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1606 | } |
1607 | ||
1608 | #else | |
b798a9ed | 1609 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1610 | { |
1611 | return 0; | |
1612 | } | |
1613 | #endif | |
1614 | ||
1da177e4 LT |
1615 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1616 | { | |
1617 | struct xfrm_dump_info *sp = ptr; | |
1618 | struct xfrm_userpolicy_info *p; | |
1619 | struct sk_buff *in_skb = sp->in_skb; | |
1620 | struct sk_buff *skb = sp->out_skb; | |
1621 | struct nlmsghdr *nlh; | |
1d1e34dd | 1622 | int err; |
1da177e4 | 1623 | |
15e47304 | 1624 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
79b8b7f4 TG |
1625 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
1626 | if (nlh == NULL) | |
1627 | return -EMSGSIZE; | |
1da177e4 | 1628 | |
7b67c857 | 1629 | p = nlmsg_data(nlh); |
1da177e4 | 1630 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
1631 | err = copy_to_user_tmpl(xp, skb); |
1632 | if (!err) | |
1633 | err = copy_to_user_sec_ctx(xp, skb); | |
1634 | if (!err) | |
1635 | err = copy_to_user_policy_type(xp->type, skb); | |
1636 | if (!err) | |
1637 | err = xfrm_mark_put(skb, &xp->mark); | |
1638 | if (err) { | |
1639 | nlmsg_cancel(skb, nlh); | |
1640 | return err; | |
1641 | } | |
9825069d | 1642 | nlmsg_end(skb, nlh); |
1da177e4 | 1643 | return 0; |
1da177e4 LT |
1644 | } |
1645 | ||
4c563f76 TT |
1646 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1647 | { | |
1648 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
283bc9f3 | 1649 | struct net *net = sock_net(cb->skb->sk); |
4c563f76 | 1650 | |
283bc9f3 | 1651 | xfrm_policy_walk_done(walk, net); |
4c563f76 TT |
1652 | return 0; |
1653 | } | |
1654 | ||
1da177e4 LT |
1655 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1656 | { | |
fc34acd3 | 1657 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1658 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1659 | struct xfrm_dump_info info; |
1660 | ||
4c563f76 TT |
1661 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1662 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1663 | ||
1da177e4 LT |
1664 | info.in_skb = cb->skb; |
1665 | info.out_skb = skb; | |
1666 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1667 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1668 | |
1669 | if (!cb->args[0]) { | |
1670 | cb->args[0] = 1; | |
1671 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1672 | } | |
1673 | ||
fc34acd3 | 1674 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1675 | |
1676 | return skb->len; | |
1677 | } | |
1678 | ||
1679 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1680 | struct xfrm_policy *xp, | |
1681 | int dir, u32 seq) | |
1682 | { | |
1683 | struct xfrm_dump_info info; | |
1684 | struct sk_buff *skb; | |
c2546372 | 1685 | int err; |
1da177e4 | 1686 | |
7deb2264 | 1687 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1688 | if (!skb) |
1689 | return ERR_PTR(-ENOMEM); | |
1690 | ||
1da177e4 LT |
1691 | info.in_skb = in_skb; |
1692 | info.out_skb = skb; | |
1693 | info.nlmsg_seq = seq; | |
1694 | info.nlmsg_flags = 0; | |
1da177e4 | 1695 | |
c2546372 MK |
1696 | err = dump_one_policy(xp, dir, 0, &info); |
1697 | if (err) { | |
1da177e4 | 1698 | kfree_skb(skb); |
c2546372 | 1699 | return ERR_PTR(err); |
1da177e4 LT |
1700 | } |
1701 | ||
1702 | return skb; | |
1703 | } | |
1704 | ||
22e70050 | 1705 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1706 | struct nlattr **attrs) |
1da177e4 | 1707 | { |
fc34acd3 | 1708 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1709 | struct xfrm_policy *xp; |
1710 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1711 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1712 | int err; |
26b15dad | 1713 | struct km_event c; |
1da177e4 | 1714 | int delete; |
295fae56 JHS |
1715 | struct xfrm_mark m; |
1716 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1717 | |
7b67c857 | 1718 | p = nlmsg_data(nlh); |
1da177e4 LT |
1719 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1720 | ||
35a7aa08 | 1721 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1722 | if (err) |
1723 | return err; | |
1724 | ||
1da177e4 LT |
1725 | err = verify_policy_dir(p->dir); |
1726 | if (err) | |
1727 | return err; | |
1728 | ||
1729 | if (p->index) | |
295fae56 | 1730 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1731 | else { |
5424f32e | 1732 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1733 | struct xfrm_sec_ctx *ctx; |
df71837d | 1734 | |
35a7aa08 | 1735 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1736 | if (err) |
1737 | return err; | |
1738 | ||
2c8dd116 | 1739 | ctx = NULL; |
df71837d | 1740 | if (rt) { |
5424f32e | 1741 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1742 | |
52a4c640 | 1743 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 1744 | if (err) |
df71837d | 1745 | return err; |
2c8dd116 | 1746 | } |
295fae56 | 1747 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1748 | ctx, delete, &err); |
03e1ad7b | 1749 | security_xfrm_policy_free(ctx); |
df71837d | 1750 | } |
1da177e4 LT |
1751 | if (xp == NULL) |
1752 | return -ENOENT; | |
1753 | ||
1754 | if (!delete) { | |
1755 | struct sk_buff *resp_skb; | |
1756 | ||
1757 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1758 | if (IS_ERR(resp_skb)) { | |
1759 | err = PTR_ERR(resp_skb); | |
1760 | } else { | |
a6483b79 | 1761 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
15e47304 | 1762 | NETLINK_CB(skb).portid); |
1da177e4 | 1763 | } |
26b15dad | 1764 | } else { |
2e71029e | 1765 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
13fcfbb0 DM |
1766 | |
1767 | if (err != 0) | |
c8c05a8e | 1768 | goto out; |
13fcfbb0 | 1769 | |
e7443892 | 1770 | c.data.byid = p->index; |
f60f6b8f | 1771 | c.event = nlh->nlmsg_type; |
26b15dad | 1772 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1773 | c.portid = nlh->nlmsg_pid; |
26b15dad | 1774 | km_policy_notify(xp, p->dir, &c); |
1da177e4 LT |
1775 | } |
1776 | ||
c8c05a8e | 1777 | out: |
ef41aaa0 | 1778 | xfrm_pol_put(xp); |
e4c17216 PM |
1779 | if (delete && err == 0) |
1780 | xfrm_garbage_collect(net); | |
1da177e4 LT |
1781 | return err; |
1782 | } | |
1783 | ||
22e70050 | 1784 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1785 | struct nlattr **attrs) |
1da177e4 | 1786 | { |
fc34acd3 | 1787 | struct net *net = sock_net(skb->sk); |
26b15dad | 1788 | struct km_event c; |
7b67c857 | 1789 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
4aa2e62c | 1790 | int err; |
1da177e4 | 1791 | |
2e71029e | 1792 | err = xfrm_state_flush(net, p->proto, true); |
9e64cc95 JHS |
1793 | if (err) { |
1794 | if (err == -ESRCH) /* empty table */ | |
1795 | return 0; | |
069c474e | 1796 | return err; |
9e64cc95 | 1797 | } |
bf08867f | 1798 | c.data.proto = p->proto; |
f60f6b8f | 1799 | c.event = nlh->nlmsg_type; |
26b15dad | 1800 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1801 | c.portid = nlh->nlmsg_pid; |
7067802e | 1802 | c.net = net; |
26b15dad JHS |
1803 | km_state_notify(NULL, &c); |
1804 | ||
1da177e4 LT |
1805 | return 0; |
1806 | } | |
1807 | ||
d8647b79 | 1808 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1809 | { |
d8647b79 SK |
1810 | size_t replay_size = x->replay_esn ? |
1811 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1812 | sizeof(struct xfrm_replay_state); | |
1813 | ||
7deb2264 | 1814 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1815 | + nla_total_size(replay_size) |
7deb2264 | 1816 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1817 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1818 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1819 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1820 | } | |
d51d081d | 1821 | |
214e005b | 1822 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1823 | { |
1824 | struct xfrm_aevent_id *id; | |
1825 | struct nlmsghdr *nlh; | |
1d1e34dd | 1826 | int err; |
d51d081d | 1827 | |
15e47304 | 1828 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
79b8b7f4 TG |
1829 | if (nlh == NULL) |
1830 | return -EMSGSIZE; | |
d51d081d | 1831 | |
7b67c857 | 1832 | id = nlmsg_data(nlh); |
9b7a787d | 1833 | memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); |
d51d081d JHS |
1834 | id->sa_id.spi = x->id.spi; |
1835 | id->sa_id.family = x->props.family; | |
1836 | id->sa_id.proto = x->id.proto; | |
9b7a787d | 1837 | memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); |
2b5f6dcc | 1838 | id->reqid = x->props.reqid; |
d51d081d JHS |
1839 | id->flags = c->data.aevent; |
1840 | ||
d0fde795 | 1841 | if (x->replay_esn) { |
1d1e34dd DM |
1842 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
1843 | xfrm_replay_state_esn_len(x->replay_esn), | |
1844 | x->replay_esn); | |
d0fde795 | 1845 | } else { |
1d1e34dd DM |
1846 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
1847 | &x->replay); | |
d0fde795 | 1848 | } |
1d1e34dd DM |
1849 | if (err) |
1850 | goto out_cancel; | |
1851 | err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
1852 | if (err) | |
1853 | goto out_cancel; | |
d51d081d | 1854 | |
1d1e34dd DM |
1855 | if (id->flags & XFRM_AE_RTHR) { |
1856 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
1857 | if (err) | |
1858 | goto out_cancel; | |
1859 | } | |
1860 | if (id->flags & XFRM_AE_ETHR) { | |
1861 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, | |
1862 | x->replay_maxage * 10 / HZ); | |
1863 | if (err) | |
1864 | goto out_cancel; | |
1865 | } | |
1866 | err = xfrm_mark_put(skb, &x->mark); | |
1867 | if (err) | |
1868 | goto out_cancel; | |
6f26b61e | 1869 | |
053c095a JB |
1870 | nlmsg_end(skb, nlh); |
1871 | return 0; | |
d51d081d | 1872 | |
1d1e34dd | 1873 | out_cancel: |
9825069d | 1874 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 1875 | return err; |
d51d081d JHS |
1876 | } |
1877 | ||
22e70050 | 1878 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1879 | struct nlattr **attrs) |
d51d081d | 1880 | { |
fc34acd3 | 1881 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1882 | struct xfrm_state *x; |
1883 | struct sk_buff *r_skb; | |
1884 | int err; | |
1885 | struct km_event c; | |
6f26b61e JHS |
1886 | u32 mark; |
1887 | struct xfrm_mark m; | |
7b67c857 | 1888 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1889 | struct xfrm_usersa_id *id = &p->sa_id; |
1890 | ||
6f26b61e JHS |
1891 | mark = xfrm_mark_get(attrs, &m); |
1892 | ||
1893 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1894 | if (x == NULL) |
d51d081d | 1895 | return -ESRCH; |
d8647b79 SK |
1896 | |
1897 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1898 | if (r_skb == NULL) { | |
1899 | xfrm_state_put(x); | |
1900 | return -ENOMEM; | |
d51d081d JHS |
1901 | } |
1902 | ||
1903 | /* | |
1904 | * XXX: is this lock really needed - none of the other | |
1905 | * gets lock (the concern is things getting updated | |
1906 | * while we are still reading) - jhs | |
1907 | */ | |
1908 | spin_lock_bh(&x->lock); | |
1909 | c.data.aevent = p->flags; | |
1910 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1911 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1912 | |
1913 | if (build_aevent(r_skb, x, &c) < 0) | |
1914 | BUG(); | |
15e47304 | 1915 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); |
d51d081d JHS |
1916 | spin_unlock_bh(&x->lock); |
1917 | xfrm_state_put(x); | |
1918 | return err; | |
1919 | } | |
1920 | ||
22e70050 | 1921 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1922 | struct nlattr **attrs) |
d51d081d | 1923 | { |
fc34acd3 | 1924 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1925 | struct xfrm_state *x; |
1926 | struct km_event c; | |
02d0892f | 1927 | int err = -EINVAL; |
6f26b61e JHS |
1928 | u32 mark = 0; |
1929 | struct xfrm_mark m; | |
7b67c857 | 1930 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1931 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1932 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1933 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
4e077237 MR |
1934 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; |
1935 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 1936 | |
4e077237 | 1937 | if (!lt && !rp && !re && !et && !rt) |
d51d081d JHS |
1938 | return err; |
1939 | ||
1940 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1941 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1942 | return err; | |
1943 | ||
6f26b61e JHS |
1944 | mark = xfrm_mark_get(attrs, &m); |
1945 | ||
1946 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1947 | if (x == NULL) |
1948 | return -ESRCH; | |
1949 | ||
1950 | if (x->km.state != XFRM_STATE_VALID) | |
1951 | goto out; | |
1952 | ||
4479ff76 | 1953 | err = xfrm_replay_verify_len(x->replay_esn, re); |
e2b19125 SK |
1954 | if (err) |
1955 | goto out; | |
1956 | ||
d51d081d | 1957 | spin_lock_bh(&x->lock); |
e3ac104d | 1958 | xfrm_update_ae_params(x, attrs, 1); |
d51d081d | 1959 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1960 | |
1961 | c.event = nlh->nlmsg_type; | |
1962 | c.seq = nlh->nlmsg_seq; | |
15e47304 | 1963 | c.portid = nlh->nlmsg_pid; |
d51d081d JHS |
1964 | c.data.aevent = XFRM_AE_CU; |
1965 | km_state_notify(x, &c); | |
1966 | err = 0; | |
1967 | out: | |
1968 | xfrm_state_put(x); | |
1969 | return err; | |
1970 | } | |
1971 | ||
22e70050 | 1972 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1973 | struct nlattr **attrs) |
1da177e4 | 1974 | { |
fc34acd3 | 1975 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1976 | struct km_event c; |
b798a9ed | 1977 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1978 | int err; |
1979 | ||
35a7aa08 | 1980 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1981 | if (err) |
1982 | return err; | |
26b15dad | 1983 | |
2e71029e | 1984 | err = xfrm_policy_flush(net, type, true); |
2f1eb65f JHS |
1985 | if (err) { |
1986 | if (err == -ESRCH) /* empty table */ | |
1987 | return 0; | |
069c474e | 1988 | return err; |
2f1eb65f JHS |
1989 | } |
1990 | ||
f7b6983f | 1991 | c.data.type = type; |
f60f6b8f | 1992 | c.event = nlh->nlmsg_type; |
26b15dad | 1993 | c.seq = nlh->nlmsg_seq; |
15e47304 | 1994 | c.portid = nlh->nlmsg_pid; |
7067802e | 1995 | c.net = net; |
26b15dad | 1996 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1997 | return 0; |
1998 | } | |
1999 | ||
22e70050 | 2000 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2001 | struct nlattr **attrs) |
6c5c8ca7 | 2002 | { |
fc34acd3 | 2003 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 2004 | struct xfrm_policy *xp; |
7b67c857 | 2005 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 2006 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 2007 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 2008 | int err = -ENOENT; |
295fae56 JHS |
2009 | struct xfrm_mark m; |
2010 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 2011 | |
35a7aa08 | 2012 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
2013 | if (err) |
2014 | return err; | |
2015 | ||
c8bf4d04 TT |
2016 | err = verify_policy_dir(p->dir); |
2017 | if (err) | |
2018 | return err; | |
2019 | ||
6c5c8ca7 | 2020 | if (p->index) |
295fae56 | 2021 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 2022 | else { |
5424f32e | 2023 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 2024 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 2025 | |
35a7aa08 | 2026 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
2027 | if (err) |
2028 | return err; | |
2029 | ||
2c8dd116 | 2030 | ctx = NULL; |
6c5c8ca7 | 2031 | if (rt) { |
5424f32e | 2032 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 2033 | |
52a4c640 | 2034 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
03e1ad7b | 2035 | if (err) |
6c5c8ca7 | 2036 | return err; |
2c8dd116 | 2037 | } |
295fae56 | 2038 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 2039 | &p->sel, ctx, 0, &err); |
03e1ad7b | 2040 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 2041 | } |
6c5c8ca7 | 2042 | if (xp == NULL) |
ef41aaa0 | 2043 | return -ENOENT; |
03e1ad7b | 2044 | |
ea2dea9d | 2045 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 2046 | goto out; |
6c5c8ca7 | 2047 | |
6c5c8ca7 JHS |
2048 | err = 0; |
2049 | if (up->hard) { | |
2050 | xfrm_policy_delete(xp, p->dir); | |
2e71029e | 2051 | xfrm_audit_policy_delete(xp, 1, true); |
6c5c8ca7 JHS |
2052 | } else { |
2053 | // reset the timers here? | |
0c199a90 | 2054 | WARN(1, "Don't know what to do with soft policy expire\n"); |
6c5c8ca7 | 2055 | } |
c6bb8136 | 2056 | km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); |
6c5c8ca7 JHS |
2057 | |
2058 | out: | |
2059 | xfrm_pol_put(xp); | |
2060 | return err; | |
2061 | } | |
2062 | ||
22e70050 | 2063 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2064 | struct nlattr **attrs) |
53bc6b4d | 2065 | { |
fc34acd3 | 2066 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
2067 | struct xfrm_state *x; |
2068 | int err; | |
7b67c857 | 2069 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 2070 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 2071 | struct xfrm_mark m; |
928497f0 | 2072 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 2073 | |
6f26b61e | 2074 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 2075 | |
3a765aa5 | 2076 | err = -ENOENT; |
53bc6b4d JHS |
2077 | if (x == NULL) |
2078 | return err; | |
2079 | ||
53bc6b4d | 2080 | spin_lock_bh(&x->lock); |
3a765aa5 | 2081 | err = -EINVAL; |
53bc6b4d JHS |
2082 | if (x->km.state != XFRM_STATE_VALID) |
2083 | goto out; | |
c6bb8136 | 2084 | km_state_expired(x, ue->hard, nlh->nlmsg_pid); |
53bc6b4d | 2085 | |
161a09e7 | 2086 | if (ue->hard) { |
53bc6b4d | 2087 | __xfrm_state_delete(x); |
2e71029e | 2088 | xfrm_audit_state_delete(x, 1, true); |
161a09e7 | 2089 | } |
3a765aa5 | 2090 | err = 0; |
53bc6b4d JHS |
2091 | out: |
2092 | spin_unlock_bh(&x->lock); | |
2093 | xfrm_state_put(x); | |
2094 | return err; | |
2095 | } | |
2096 | ||
22e70050 | 2097 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 2098 | struct nlattr **attrs) |
980ebd25 | 2099 | { |
fc34acd3 | 2100 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
2101 | struct xfrm_policy *xp; |
2102 | struct xfrm_user_tmpl *ut; | |
2103 | int i; | |
5424f32e | 2104 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 2105 | struct xfrm_mark mark; |
980ebd25 | 2106 | |
7b67c857 | 2107 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 2108 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
2109 | int err = -ENOMEM; |
2110 | ||
2111 | if (!x) | |
d8eb9307 | 2112 | goto nomem; |
980ebd25 | 2113 | |
6f26b61e JHS |
2114 | xfrm_mark_get(attrs, &mark); |
2115 | ||
980ebd25 | 2116 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
2117 | if (err) |
2118 | goto bad_policy; | |
980ebd25 JHS |
2119 | |
2120 | /* build an XP */ | |
fc34acd3 | 2121 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
2122 | if (!xp) |
2123 | goto free_state; | |
980ebd25 JHS |
2124 | |
2125 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
2126 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
2127 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
2128 | xp->mark.m = x->mark.m = mark.m; |
2129 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 2130 | ut = nla_data(rt); |
980ebd25 JHS |
2131 | /* extract the templates and for each call km_key */ |
2132 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
2133 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
2134 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
2135 | x->props.mode = t->mode; | |
2136 | x->props.reqid = t->reqid; | |
2137 | x->props.family = ut->family; | |
2138 | t->aalgos = ua->aalgos; | |
2139 | t->ealgos = ua->ealgos; | |
2140 | t->calgos = ua->calgos; | |
2141 | err = km_query(x, t, xp); | |
2142 | ||
2143 | } | |
2144 | ||
2145 | kfree(x); | |
2146 | kfree(xp); | |
2147 | ||
2148 | return 0; | |
d8eb9307 IJ |
2149 | |
2150 | bad_policy: | |
62db5cfd | 2151 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2152 | free_state: |
2153 | kfree(x); | |
2154 | nomem: | |
2155 | return err; | |
980ebd25 JHS |
2156 | } |
2157 | ||
5c79de6e | 2158 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2159 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2160 | struct xfrm_kmaddress *k, |
5424f32e | 2161 | struct nlattr **attrs, int *num) |
5c79de6e | 2162 | { |
5424f32e | 2163 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2164 | struct xfrm_user_migrate *um; |
2165 | int i, num_migrate; | |
2166 | ||
13c1d189 AE |
2167 | if (k != NULL) { |
2168 | struct xfrm_user_kmaddress *uk; | |
2169 | ||
2170 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2171 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2172 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2173 | k->family = uk->family; | |
2174 | k->reserved = uk->reserved; | |
2175 | } | |
2176 | ||
5424f32e TG |
2177 | um = nla_data(rt); |
2178 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2179 | |
2180 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2181 | return -EINVAL; | |
2182 | ||
2183 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2184 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2185 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2186 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2187 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2188 | ||
2189 | ma->proto = um->proto; | |
2190 | ma->mode = um->mode; | |
2191 | ma->reqid = um->reqid; | |
2192 | ||
2193 | ma->old_family = um->old_family; | |
2194 | ma->new_family = um->new_family; | |
2195 | } | |
2196 | ||
2197 | *num = i; | |
2198 | return 0; | |
2199 | } | |
2200 | ||
2201 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2202 | struct nlattr **attrs) |
5c79de6e | 2203 | { |
7b67c857 | 2204 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2205 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2206 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2207 | u8 type; |
2208 | int err; | |
2209 | int n = 0; | |
8d549c4f | 2210 | struct net *net = sock_net(skb->sk); |
5c79de6e | 2211 | |
35a7aa08 | 2212 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2213 | return -EINVAL; |
5c79de6e | 2214 | |
13c1d189 AE |
2215 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2216 | ||
5424f32e | 2217 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2218 | if (err) |
2219 | return err; | |
2220 | ||
13c1d189 | 2221 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2222 | if (err) |
2223 | return err; | |
2224 | ||
2225 | if (!n) | |
2226 | return 0; | |
2227 | ||
8d549c4f | 2228 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net); |
5c79de6e SS |
2229 | |
2230 | return 0; | |
2231 | } | |
2232 | #else | |
2233 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2234 | struct nlattr **attrs) |
5c79de6e SS |
2235 | { |
2236 | return -ENOPROTOOPT; | |
2237 | } | |
2238 | #endif | |
2239 | ||
2240 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2241 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2242 | { |
2243 | struct xfrm_user_migrate um; | |
2244 | ||
2245 | memset(&um, 0, sizeof(um)); | |
2246 | um.proto = m->proto; | |
2247 | um.mode = m->mode; | |
2248 | um.reqid = m->reqid; | |
2249 | um.old_family = m->old_family; | |
2250 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2251 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2252 | um.new_family = m->new_family; | |
2253 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2254 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2255 | ||
c0144bea | 2256 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2257 | } |
2258 | ||
183cad12 | 2259 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2260 | { |
2261 | struct xfrm_user_kmaddress uk; | |
2262 | ||
2263 | memset(&uk, 0, sizeof(uk)); | |
2264 | uk.family = k->family; | |
2265 | uk.reserved = k->reserved; | |
2266 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2267 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2268 | |
2269 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2270 | } | |
2271 | ||
2272 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2273 | { |
2274 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2275 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2276 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2277 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2278 | } |
2279 | ||
183cad12 DM |
2280 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2281 | int num_migrate, const struct xfrm_kmaddress *k, | |
2282 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2283 | { |
183cad12 | 2284 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2285 | struct xfrm_userpolicy_id *pol_id; |
2286 | struct nlmsghdr *nlh; | |
1d1e34dd | 2287 | int i, err; |
5c79de6e | 2288 | |
79b8b7f4 TG |
2289 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2290 | if (nlh == NULL) | |
2291 | return -EMSGSIZE; | |
5c79de6e | 2292 | |
7b67c857 | 2293 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2294 | /* copy data from selector, dir, and type to the pol_id */ |
2295 | memset(pol_id, 0, sizeof(*pol_id)); | |
2296 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2297 | pol_id->dir = dir; | |
2298 | ||
1d1e34dd DM |
2299 | if (k != NULL) { |
2300 | err = copy_to_user_kmaddress(k, skb); | |
2301 | if (err) | |
2302 | goto out_cancel; | |
2303 | } | |
2304 | err = copy_to_user_policy_type(type, skb); | |
2305 | if (err) | |
2306 | goto out_cancel; | |
5c79de6e | 2307 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
1d1e34dd DM |
2308 | err = copy_to_user_migrate(mp, skb); |
2309 | if (err) | |
2310 | goto out_cancel; | |
5c79de6e SS |
2311 | } |
2312 | ||
053c095a JB |
2313 | nlmsg_end(skb, nlh); |
2314 | return 0; | |
1d1e34dd DM |
2315 | |
2316 | out_cancel: | |
9825069d | 2317 | nlmsg_cancel(skb, nlh); |
1d1e34dd | 2318 | return err; |
5c79de6e SS |
2319 | } |
2320 | ||
183cad12 DM |
2321 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2322 | const struct xfrm_migrate *m, int num_migrate, | |
2323 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2324 | { |
a6483b79 | 2325 | struct net *net = &init_net; |
5c79de6e | 2326 | struct sk_buff *skb; |
5c79de6e | 2327 | |
13c1d189 | 2328 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2329 | if (skb == NULL) |
2330 | return -ENOMEM; | |
2331 | ||
2332 | /* build migrate */ | |
13c1d189 | 2333 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2334 | BUG(); |
2335 | ||
21ee543e | 2336 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); |
5c79de6e SS |
2337 | } |
2338 | #else | |
183cad12 DM |
2339 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2340 | const struct xfrm_migrate *m, int num_migrate, | |
2341 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2342 | { |
2343 | return -ENOPROTOOPT; | |
2344 | } | |
2345 | #endif | |
d51d081d | 2346 | |
a7bd9a45 | 2347 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2348 | |
2349 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2350 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2351 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2352 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2353 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2354 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2355 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2356 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2357 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2358 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2359 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2360 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2361 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2362 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2363 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2364 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2365 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2366 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2367 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 | 2368 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
880a6fab | 2369 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
a7bd9a45 | 2370 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
1da177e4 LT |
2371 | }; |
2372 | ||
492b558b TG |
2373 | #undef XMSGSIZE |
2374 | ||
cf5cb79f | 2375 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2376 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2377 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2378 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2379 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2380 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2381 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2382 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2383 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2384 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2385 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2386 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2387 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2388 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2389 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2390 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2391 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2392 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2393 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2394 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2395 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2396 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2397 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2398 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
a947b0a9 | 2399 | [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, |
d3623099 | 2400 | [XFRMA_PROTO] = { .type = NLA_U8 }, |
870a2df4 | 2401 | [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, |
cf5cb79f TG |
2402 | }; |
2403 | ||
880a6fab CG |
2404 | static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { |
2405 | [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2406 | [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, | |
2407 | }; | |
2408 | ||
05600a79 | 2409 | static const struct xfrm_link { |
5424f32e | 2410 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2411 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2412 | int (*done)(struct netlink_callback *); |
880a6fab CG |
2413 | const struct nla_policy *nla_pol; |
2414 | int nla_max; | |
492b558b TG |
2415 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2416 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2417 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2418 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2419 | .dump = xfrm_dump_sa, |
2420 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2421 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2422 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2423 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2424 | .dump = xfrm_dump_policy, |
2425 | .done = xfrm_dump_policy_done }, | |
492b558b | 2426 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2427 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2428 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2429 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2430 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2431 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2432 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2433 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2434 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2435 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2436 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2437 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
880a6fab CG |
2438 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, |
2439 | .nla_pol = xfrma_spd_policy, | |
2440 | .nla_max = XFRMA_SPD_MAX }, | |
ecfd6b18 | 2441 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2442 | }; |
2443 | ||
1d00a4eb | 2444 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2445 | { |
a6483b79 | 2446 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2447 | struct nlattr *attrs[XFRMA_MAX+1]; |
05600a79 | 2448 | const struct xfrm_link *link; |
a7bd9a45 | 2449 | int type, err; |
1da177e4 | 2450 | |
74005991 FD |
2451 | #ifdef CONFIG_COMPAT |
2452 | if (is_compat_task()) | |
2453 | return -ENOTSUPP; | |
2454 | #endif | |
2455 | ||
1da177e4 | 2456 | type = nlh->nlmsg_type; |
1da177e4 | 2457 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2458 | return -EINVAL; |
1da177e4 LT |
2459 | |
2460 | type -= XFRM_MSG_BASE; | |
2461 | link = &xfrm_dispatch[type]; | |
2462 | ||
2463 | /* All operations require privileges, even GET */ | |
90f62cf3 | 2464 | if (!netlink_net_capable(skb, CAP_NET_ADMIN)) |
1d00a4eb | 2465 | return -EPERM; |
1da177e4 | 2466 | |
492b558b TG |
2467 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2468 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2469 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2470 | if (link->dump == NULL) |
1d00a4eb | 2471 | return -EINVAL; |
88fc2c84 | 2472 | |
80d326fa PNA |
2473 | { |
2474 | struct netlink_dump_control c = { | |
2475 | .dump = link->dump, | |
2476 | .done = link->done, | |
2477 | }; | |
2478 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); | |
2479 | } | |
1da177e4 LT |
2480 | } |
2481 | ||
880a6fab CG |
2482 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, |
2483 | link->nla_max ? : XFRMA_MAX, | |
2484 | link->nla_pol ? : xfrma_policy); | |
a7bd9a45 TG |
2485 | if (err < 0) |
2486 | return err; | |
1da177e4 LT |
2487 | |
2488 | if (link->doit == NULL) | |
1d00a4eb | 2489 | return -EINVAL; |
1da177e4 | 2490 | |
5424f32e | 2491 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2492 | } |
2493 | ||
cd40b7d3 | 2494 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2495 | { |
283bc9f3 FD |
2496 | struct net *net = sock_net(skb->sk); |
2497 | ||
2498 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); | |
cd40b7d3 | 2499 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); |
283bc9f3 | 2500 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4 LT |
2501 | } |
2502 | ||
7deb2264 TG |
2503 | static inline size_t xfrm_expire_msgsize(void) |
2504 | { | |
6f26b61e JHS |
2505 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2506 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2507 | } |
2508 | ||
214e005b | 2509 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2510 | { |
2511 | struct xfrm_user_expire *ue; | |
2512 | struct nlmsghdr *nlh; | |
1d1e34dd | 2513 | int err; |
1da177e4 | 2514 | |
15e47304 | 2515 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
79b8b7f4 TG |
2516 | if (nlh == NULL) |
2517 | return -EMSGSIZE; | |
1da177e4 | 2518 | |
7b67c857 | 2519 | ue = nlmsg_data(nlh); |
1da177e4 | 2520 | copy_to_user_state(x, &ue->state); |
d51d081d | 2521 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2522 | |
1d1e34dd DM |
2523 | err = xfrm_mark_put(skb, &x->mark); |
2524 | if (err) | |
2525 | return err; | |
6f26b61e | 2526 | |
053c095a JB |
2527 | nlmsg_end(skb, nlh); |
2528 | return 0; | |
1da177e4 LT |
2529 | } |
2530 | ||
214e005b | 2531 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2532 | { |
fc34acd3 | 2533 | struct net *net = xs_net(x); |
1da177e4 LT |
2534 | struct sk_buff *skb; |
2535 | ||
7deb2264 | 2536 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2537 | if (skb == NULL) |
2538 | return -ENOMEM; | |
2539 | ||
6f26b61e JHS |
2540 | if (build_expire(skb, x, c) < 0) { |
2541 | kfree_skb(skb); | |
2542 | return -EMSGSIZE; | |
2543 | } | |
1da177e4 | 2544 | |
21ee543e | 2545 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2546 | } |
2547 | ||
214e005b | 2548 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2549 | { |
fc34acd3 | 2550 | struct net *net = xs_net(x); |
d51d081d | 2551 | struct sk_buff *skb; |
d51d081d | 2552 | |
d8647b79 | 2553 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2554 | if (skb == NULL) |
2555 | return -ENOMEM; | |
2556 | ||
2557 | if (build_aevent(skb, x, c) < 0) | |
2558 | BUG(); | |
2559 | ||
21ee543e | 2560 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); |
d51d081d JHS |
2561 | } |
2562 | ||
214e005b | 2563 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2564 | { |
7067802e | 2565 | struct net *net = c->net; |
26b15dad JHS |
2566 | struct xfrm_usersa_flush *p; |
2567 | struct nlmsghdr *nlh; | |
2568 | struct sk_buff *skb; | |
7deb2264 | 2569 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2570 | |
7deb2264 | 2571 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2572 | if (skb == NULL) |
2573 | return -ENOMEM; | |
26b15dad | 2574 | |
15e47304 | 2575 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
79b8b7f4 TG |
2576 | if (nlh == NULL) { |
2577 | kfree_skb(skb); | |
2578 | return -EMSGSIZE; | |
2579 | } | |
26b15dad | 2580 | |
7b67c857 | 2581 | p = nlmsg_data(nlh); |
bf08867f | 2582 | p->proto = c->data.proto; |
26b15dad | 2583 | |
9825069d | 2584 | nlmsg_end(skb, nlh); |
26b15dad | 2585 | |
21ee543e | 2586 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad JHS |
2587 | } |
2588 | ||
7deb2264 | 2589 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2590 | { |
7deb2264 | 2591 | size_t l = 0; |
1a6509d9 HX |
2592 | if (x->aead) |
2593 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2594 | if (x->aalg) { |
2595 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2596 | (x->aalg->alg_key_len + 7) / 8); | |
2597 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2598 | } | |
26b15dad | 2599 | if (x->ealg) |
0f99be0d | 2600 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2601 | if (x->calg) |
7deb2264 | 2602 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2603 | if (x->encap) |
7deb2264 | 2604 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2605 | if (x->tfcpad) |
2606 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2607 | if (x->replay_esn) |
2608 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
f293a5e3 | 2609 | else |
2610 | l += nla_total_size(sizeof(struct xfrm_replay_state)); | |
68325d3b HX |
2611 | if (x->security) |
2612 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2613 | x->security->ctx_len); | |
2614 | if (x->coaddr) | |
2615 | l += nla_total_size(sizeof(*x->coaddr)); | |
a947b0a9 ND |
2616 | if (x->props.extra_flags) |
2617 | l += nla_total_size(sizeof(x->props.extra_flags)); | |
68325d3b | 2618 | |
d26f3984 HX |
2619 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2620 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2621 | |
2622 | return l; | |
2623 | } | |
2624 | ||
214e005b | 2625 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2626 | { |
fc34acd3 | 2627 | struct net *net = xs_net(x); |
26b15dad | 2628 | struct xfrm_usersa_info *p; |
0603eac0 | 2629 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2630 | struct nlmsghdr *nlh; |
2631 | struct sk_buff *skb; | |
26b15dad | 2632 | int len = xfrm_sa_len(x); |
1d1e34dd | 2633 | int headlen, err; |
0603eac0 HX |
2634 | |
2635 | headlen = sizeof(*p); | |
2636 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2637 | len += nla_total_size(headlen); |
0603eac0 | 2638 | headlen = sizeof(*id); |
6f26b61e | 2639 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2640 | } |
7deb2264 | 2641 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2642 | |
7deb2264 | 2643 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2644 | if (skb == NULL) |
2645 | return -ENOMEM; | |
26b15dad | 2646 | |
15e47304 | 2647 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2648 | err = -EMSGSIZE; |
79b8b7f4 | 2649 | if (nlh == NULL) |
1d1e34dd | 2650 | goto out_free_skb; |
26b15dad | 2651 | |
7b67c857 | 2652 | p = nlmsg_data(nlh); |
0603eac0 | 2653 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2654 | struct nlattr *attr; |
2655 | ||
7b67c857 | 2656 | id = nlmsg_data(nlh); |
0603eac0 HX |
2657 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2658 | id->spi = x->id.spi; | |
2659 | id->family = x->props.family; | |
2660 | id->proto = x->id.proto; | |
2661 | ||
c0144bea | 2662 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
1d1e34dd | 2663 | err = -EMSGSIZE; |
c0144bea | 2664 | if (attr == NULL) |
1d1e34dd | 2665 | goto out_free_skb; |
c0144bea TG |
2666 | |
2667 | p = nla_data(attr); | |
0603eac0 | 2668 | } |
1d1e34dd DM |
2669 | err = copy_to_user_state_extra(x, p, skb); |
2670 | if (err) | |
2671 | goto out_free_skb; | |
26b15dad | 2672 | |
9825069d | 2673 | nlmsg_end(skb, nlh); |
26b15dad | 2674 | |
21ee543e | 2675 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
26b15dad | 2676 | |
1d1e34dd | 2677 | out_free_skb: |
26b15dad | 2678 | kfree_skb(skb); |
1d1e34dd | 2679 | return err; |
26b15dad JHS |
2680 | } |
2681 | ||
214e005b | 2682 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2683 | { |
2684 | ||
2685 | switch (c->event) { | |
f60f6b8f | 2686 | case XFRM_MSG_EXPIRE: |
26b15dad | 2687 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2688 | case XFRM_MSG_NEWAE: |
2689 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2690 | case XFRM_MSG_DELSA: |
2691 | case XFRM_MSG_UPDSA: | |
2692 | case XFRM_MSG_NEWSA: | |
26b15dad | 2693 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2694 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2695 | return xfrm_notify_sa_flush(c); |
2696 | default: | |
62db5cfd | 2697 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2698 | c->event); | |
2699 | break; | |
26b15dad JHS |
2700 | } |
2701 | ||
2702 | return 0; | |
2703 | ||
2704 | } | |
2705 | ||
7deb2264 TG |
2706 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2707 | struct xfrm_policy *xp) | |
2708 | { | |
2709 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2710 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2711 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2712 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2713 | + userpolicy_type_attrsize(); | |
2714 | } | |
2715 | ||
1da177e4 | 2716 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
65e0736b | 2717 | struct xfrm_tmpl *xt, struct xfrm_policy *xp) |
1da177e4 | 2718 | { |
1d1e34dd | 2719 | __u32 seq = xfrm_get_acqseq(); |
1da177e4 LT |
2720 | struct xfrm_user_acquire *ua; |
2721 | struct nlmsghdr *nlh; | |
1d1e34dd | 2722 | int err; |
1da177e4 | 2723 | |
79b8b7f4 TG |
2724 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2725 | if (nlh == NULL) | |
2726 | return -EMSGSIZE; | |
1da177e4 | 2727 | |
7b67c857 | 2728 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2729 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2730 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2731 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
65e0736b | 2732 | copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); |
1da177e4 LT |
2733 | ua->aalgos = xt->aalgos; |
2734 | ua->ealgos = xt->ealgos; | |
2735 | ua->calgos = xt->calgos; | |
2736 | ua->seq = x->km.seq = seq; | |
2737 | ||
1d1e34dd DM |
2738 | err = copy_to_user_tmpl(xp, skb); |
2739 | if (!err) | |
2740 | err = copy_to_user_state_sec_ctx(x, skb); | |
2741 | if (!err) | |
2742 | err = copy_to_user_policy_type(xp->type, skb); | |
2743 | if (!err) | |
2744 | err = xfrm_mark_put(skb, &xp->mark); | |
2745 | if (err) { | |
2746 | nlmsg_cancel(skb, nlh); | |
2747 | return err; | |
2748 | } | |
1da177e4 | 2749 | |
053c095a JB |
2750 | nlmsg_end(skb, nlh); |
2751 | return 0; | |
1da177e4 LT |
2752 | } |
2753 | ||
2754 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
65e0736b | 2755 | struct xfrm_policy *xp) |
1da177e4 | 2756 | { |
a6483b79 | 2757 | struct net *net = xs_net(x); |
1da177e4 | 2758 | struct sk_buff *skb; |
1da177e4 | 2759 | |
7deb2264 | 2760 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2761 | if (skb == NULL) |
2762 | return -ENOMEM; | |
2763 | ||
65e0736b | 2764 | if (build_acquire(skb, x, xt, xp) < 0) |
1da177e4 LT |
2765 | BUG(); |
2766 | ||
21ee543e | 2767 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); |
1da177e4 LT |
2768 | } |
2769 | ||
2770 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2771 | * or more templates. | |
2772 | */ | |
cb969f07 | 2773 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2774 | u8 *data, int len, int *dir) |
2775 | { | |
fc34acd3 | 2776 | struct net *net = sock_net(sk); |
1da177e4 LT |
2777 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2778 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2779 | struct xfrm_policy *xp; | |
2780 | int nr; | |
2781 | ||
cb969f07 | 2782 | switch (sk->sk_family) { |
1da177e4 LT |
2783 | case AF_INET: |
2784 | if (opt != IP_XFRM_POLICY) { | |
2785 | *dir = -EOPNOTSUPP; | |
2786 | return NULL; | |
2787 | } | |
2788 | break; | |
dfd56b8b | 2789 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
2790 | case AF_INET6: |
2791 | if (opt != IPV6_XFRM_POLICY) { | |
2792 | *dir = -EOPNOTSUPP; | |
2793 | return NULL; | |
2794 | } | |
2795 | break; | |
2796 | #endif | |
2797 | default: | |
2798 | *dir = -EINVAL; | |
2799 | return NULL; | |
2800 | } | |
2801 | ||
2802 | *dir = -EINVAL; | |
2803 | ||
2804 | if (len < sizeof(*p) || | |
2805 | verify_newpolicy_info(p)) | |
2806 | return NULL; | |
2807 | ||
2808 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2809 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2810 | return NULL; |
2811 | ||
a4f1bac6 HX |
2812 | if (p->dir > XFRM_POLICY_OUT) |
2813 | return NULL; | |
2814 | ||
2f09a4d5 | 2815 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2816 | if (xp == NULL) { |
2817 | *dir = -ENOBUFS; | |
2818 | return NULL; | |
2819 | } | |
2820 | ||
2821 | copy_from_user_policy(xp, p); | |
f7b6983f | 2822 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2823 | copy_templates(xp, ut, nr); |
2824 | ||
2825 | *dir = p->dir; | |
2826 | ||
2827 | return xp; | |
2828 | } | |
2829 | ||
7deb2264 TG |
2830 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2831 | { | |
2832 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2833 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2834 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2835 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2836 | + userpolicy_type_attrsize(); |
2837 | } | |
2838 | ||
1da177e4 | 2839 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2840 | int dir, const struct km_event *c) |
1da177e4 LT |
2841 | { |
2842 | struct xfrm_user_polexpire *upe; | |
d51d081d | 2843 | int hard = c->data.hard; |
1d1e34dd DM |
2844 | struct nlmsghdr *nlh; |
2845 | int err; | |
1da177e4 | 2846 | |
15e47304 | 2847 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
79b8b7f4 TG |
2848 | if (nlh == NULL) |
2849 | return -EMSGSIZE; | |
1da177e4 | 2850 | |
7b67c857 | 2851 | upe = nlmsg_data(nlh); |
1da177e4 | 2852 | copy_to_user_policy(xp, &upe->pol, dir); |
1d1e34dd DM |
2853 | err = copy_to_user_tmpl(xp, skb); |
2854 | if (!err) | |
2855 | err = copy_to_user_sec_ctx(xp, skb); | |
2856 | if (!err) | |
2857 | err = copy_to_user_policy_type(xp->type, skb); | |
2858 | if (!err) | |
2859 | err = xfrm_mark_put(skb, &xp->mark); | |
2860 | if (err) { | |
2861 | nlmsg_cancel(skb, nlh); | |
2862 | return err; | |
2863 | } | |
1da177e4 LT |
2864 | upe->hard = !!hard; |
2865 | ||
053c095a JB |
2866 | nlmsg_end(skb, nlh); |
2867 | return 0; | |
1da177e4 LT |
2868 | } |
2869 | ||
214e005b | 2870 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2871 | { |
fc34acd3 | 2872 | struct net *net = xp_net(xp); |
1da177e4 | 2873 | struct sk_buff *skb; |
1da177e4 | 2874 | |
7deb2264 | 2875 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2876 | if (skb == NULL) |
2877 | return -ENOMEM; | |
2878 | ||
d51d081d | 2879 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2880 | BUG(); |
2881 | ||
21ee543e | 2882 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
1da177e4 LT |
2883 | } |
2884 | ||
214e005b | 2885 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2886 | { |
1d1e34dd | 2887 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
fc34acd3 | 2888 | struct net *net = xp_net(xp); |
26b15dad | 2889 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2890 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2891 | struct nlmsghdr *nlh; |
2892 | struct sk_buff *skb; | |
1d1e34dd | 2893 | int headlen, err; |
0603eac0 HX |
2894 | |
2895 | headlen = sizeof(*p); | |
2896 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2897 | len += nla_total_size(headlen); |
0603eac0 HX |
2898 | headlen = sizeof(*id); |
2899 | } | |
cfbfd45a | 2900 | len += userpolicy_type_attrsize(); |
295fae56 | 2901 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2902 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2903 | |
7deb2264 | 2904 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2905 | if (skb == NULL) |
2906 | return -ENOMEM; | |
26b15dad | 2907 | |
15e47304 | 2908 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
1d1e34dd | 2909 | err = -EMSGSIZE; |
79b8b7f4 | 2910 | if (nlh == NULL) |
1d1e34dd | 2911 | goto out_free_skb; |
26b15dad | 2912 | |
7b67c857 | 2913 | p = nlmsg_data(nlh); |
0603eac0 | 2914 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2915 | struct nlattr *attr; |
2916 | ||
7b67c857 | 2917 | id = nlmsg_data(nlh); |
0603eac0 HX |
2918 | memset(id, 0, sizeof(*id)); |
2919 | id->dir = dir; | |
2920 | if (c->data.byid) | |
2921 | id->index = xp->index; | |
2922 | else | |
2923 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2924 | ||
c0144bea | 2925 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
1d1e34dd | 2926 | err = -EMSGSIZE; |
c0144bea | 2927 | if (attr == NULL) |
1d1e34dd | 2928 | goto out_free_skb; |
c0144bea TG |
2929 | |
2930 | p = nla_data(attr); | |
0603eac0 | 2931 | } |
26b15dad | 2932 | |
26b15dad | 2933 | copy_to_user_policy(xp, p, dir); |
1d1e34dd DM |
2934 | err = copy_to_user_tmpl(xp, skb); |
2935 | if (!err) | |
2936 | err = copy_to_user_policy_type(xp->type, skb); | |
2937 | if (!err) | |
2938 | err = xfrm_mark_put(skb, &xp->mark); | |
2939 | if (err) | |
2940 | goto out_free_skb; | |
295fae56 | 2941 | |
9825069d | 2942 | nlmsg_end(skb, nlh); |
26b15dad | 2943 | |
21ee543e | 2944 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2945 | |
1d1e34dd | 2946 | out_free_skb: |
26b15dad | 2947 | kfree_skb(skb); |
1d1e34dd | 2948 | return err; |
26b15dad JHS |
2949 | } |
2950 | ||
214e005b | 2951 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2952 | { |
7067802e | 2953 | struct net *net = c->net; |
26b15dad JHS |
2954 | struct nlmsghdr *nlh; |
2955 | struct sk_buff *skb; | |
1d1e34dd | 2956 | int err; |
26b15dad | 2957 | |
7deb2264 | 2958 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2959 | if (skb == NULL) |
2960 | return -ENOMEM; | |
26b15dad | 2961 | |
15e47304 | 2962 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
1d1e34dd | 2963 | err = -EMSGSIZE; |
79b8b7f4 | 2964 | if (nlh == NULL) |
1d1e34dd DM |
2965 | goto out_free_skb; |
2966 | err = copy_to_user_policy_type(c->data.type, skb); | |
2967 | if (err) | |
2968 | goto out_free_skb; | |
26b15dad | 2969 | |
9825069d | 2970 | nlmsg_end(skb, nlh); |
26b15dad | 2971 | |
21ee543e | 2972 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
26b15dad | 2973 | |
1d1e34dd | 2974 | out_free_skb: |
26b15dad | 2975 | kfree_skb(skb); |
1d1e34dd | 2976 | return err; |
26b15dad JHS |
2977 | } |
2978 | ||
214e005b | 2979 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2980 | { |
2981 | ||
2982 | switch (c->event) { | |
f60f6b8f HX |
2983 | case XFRM_MSG_NEWPOLICY: |
2984 | case XFRM_MSG_UPDPOLICY: | |
2985 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2986 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2987 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2988 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2989 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2990 | return xfrm_exp_policy_notify(xp, dir, c); |
2991 | default: | |
62db5cfd | 2992 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2993 | c->event); | |
26b15dad JHS |
2994 | } |
2995 | ||
2996 | return 0; | |
2997 | ||
2998 | } | |
2999 | ||
7deb2264 TG |
3000 | static inline size_t xfrm_report_msgsize(void) |
3001 | { | |
3002 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
3003 | } | |
3004 | ||
97a64b45 MN |
3005 | static int build_report(struct sk_buff *skb, u8 proto, |
3006 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
3007 | { | |
3008 | struct xfrm_user_report *ur; | |
3009 | struct nlmsghdr *nlh; | |
97a64b45 | 3010 | |
79b8b7f4 TG |
3011 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
3012 | if (nlh == NULL) | |
3013 | return -EMSGSIZE; | |
97a64b45 | 3014 | |
7b67c857 | 3015 | ur = nlmsg_data(nlh); |
97a64b45 MN |
3016 | ur->proto = proto; |
3017 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
3018 | ||
1d1e34dd DM |
3019 | if (addr) { |
3020 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); | |
3021 | if (err) { | |
3022 | nlmsg_cancel(skb, nlh); | |
3023 | return err; | |
3024 | } | |
3025 | } | |
053c095a JB |
3026 | nlmsg_end(skb, nlh); |
3027 | return 0; | |
97a64b45 MN |
3028 | } |
3029 | ||
db983c11 AD |
3030 | static int xfrm_send_report(struct net *net, u8 proto, |
3031 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
3032 | { |
3033 | struct sk_buff *skb; | |
97a64b45 | 3034 | |
7deb2264 | 3035 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
3036 | if (skb == NULL) |
3037 | return -ENOMEM; | |
3038 | ||
3039 | if (build_report(skb, proto, sel, addr) < 0) | |
3040 | BUG(); | |
3041 | ||
21ee543e | 3042 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); |
97a64b45 MN |
3043 | } |
3044 | ||
3a2dfbe8 MW |
3045 | static inline size_t xfrm_mapping_msgsize(void) |
3046 | { | |
3047 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
3048 | } | |
3049 | ||
3050 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
3051 | xfrm_address_t *new_saddr, __be16 new_sport) | |
3052 | { | |
3053 | struct xfrm_user_mapping *um; | |
3054 | struct nlmsghdr *nlh; | |
3055 | ||
3056 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
3057 | if (nlh == NULL) | |
3058 | return -EMSGSIZE; | |
3059 | ||
3060 | um = nlmsg_data(nlh); | |
3061 | ||
3062 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
3063 | um->id.spi = x->id.spi; | |
3064 | um->id.family = x->props.family; | |
3065 | um->id.proto = x->id.proto; | |
3066 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
3067 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
3068 | um->new_sport = new_sport; | |
3069 | um->old_sport = x->encap->encap_sport; | |
3070 | um->reqid = x->props.reqid; | |
3071 | ||
053c095a JB |
3072 | nlmsg_end(skb, nlh); |
3073 | return 0; | |
3a2dfbe8 MW |
3074 | } |
3075 | ||
3076 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
3077 | __be16 sport) | |
3078 | { | |
a6483b79 | 3079 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
3080 | struct sk_buff *skb; |
3081 | ||
3082 | if (x->id.proto != IPPROTO_ESP) | |
3083 | return -EINVAL; | |
3084 | ||
3085 | if (!x->encap) | |
3086 | return -EINVAL; | |
3087 | ||
3088 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
3089 | if (skb == NULL) | |
3090 | return -ENOMEM; | |
3091 | ||
3092 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
3093 | BUG(); | |
3094 | ||
21ee543e | 3095 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); |
3a2dfbe8 MW |
3096 | } |
3097 | ||
0f24558e HG |
3098 | static bool xfrm_is_alive(const struct km_event *c) |
3099 | { | |
3100 | return (bool)xfrm_acquire_is_on(c->net); | |
3101 | } | |
3102 | ||
1da177e4 LT |
3103 | static struct xfrm_mgr netlink_mgr = { |
3104 | .id = "netlink", | |
3105 | .notify = xfrm_send_state_notify, | |
3106 | .acquire = xfrm_send_acquire, | |
3107 | .compile_policy = xfrm_compile_policy, | |
3108 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 3109 | .report = xfrm_send_report, |
5c79de6e | 3110 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 3111 | .new_mapping = xfrm_send_mapping, |
0f24558e | 3112 | .is_alive = xfrm_is_alive, |
1da177e4 LT |
3113 | }; |
3114 | ||
a6483b79 | 3115 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 3116 | { |
be33690d | 3117 | struct sock *nlsk; |
a31f2d17 PNA |
3118 | struct netlink_kernel_cfg cfg = { |
3119 | .groups = XFRMNLGRP_MAX, | |
3120 | .input = xfrm_netlink_rcv, | |
3121 | }; | |
be33690d | 3122 | |
9f00d977 | 3123 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); |
be33690d | 3124 | if (nlsk == NULL) |
1da177e4 | 3125 | return -ENOMEM; |
d79d792e | 3126 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
cf778b00 | 3127 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
3128 | return 0; |
3129 | } | |
3130 | ||
d79d792e | 3131 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 3132 | { |
d79d792e EB |
3133 | struct net *net; |
3134 | list_for_each_entry(net, net_exit_list, exit_list) | |
a9b3cd7f | 3135 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
d79d792e EB |
3136 | synchronize_net(); |
3137 | list_for_each_entry(net, net_exit_list, exit_list) | |
3138 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
3139 | } |
3140 | ||
a6483b79 | 3141 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
3142 | .init = xfrm_user_net_init, |
3143 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
3144 | }; |
3145 | ||
3146 | static int __init xfrm_user_init(void) | |
3147 | { | |
3148 | int rv; | |
3149 | ||
3150 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
3151 | ||
3152 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
3153 | if (rv < 0) | |
3154 | return rv; | |
3155 | rv = xfrm_register_km(&netlink_mgr); | |
3156 | if (rv < 0) | |
3157 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3158 | return rv; | |
3159 | } | |
3160 | ||
3161 | static void __exit xfrm_user_exit(void) | |
3162 | { | |
3163 | xfrm_unregister_km(&netlink_mgr); | |
3164 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
3165 | } | |
3166 | ||
1da177e4 LT |
3167 | module_init(xfrm_user_init); |
3168 | module_exit(xfrm_user_exit); | |
3169 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 3170 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 3171 |