projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...
[deliverable/linux.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
1da177e4 30#include <asm/uaccess.h>
dfd56b8b 31#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 32#include <linux/in6.h>
33#endif
1da177e4 34
1a6509d9
HX		 35static inline int aead_len(struct xfrm_algo_aead *alg)
36{
37 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
38}
39
5424f32e 40static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 41{
5424f32e 42 struct nlattr *rt = attrs[type];
1da177e4
LT		 43 struct xfrm_algo *algp;
44
45 if (!rt)
46 return 0;
47
5424f32e 48 algp = nla_data(rt);
0f99be0d 49 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 50 return -EINVAL;
51
1da177e4
LT		 52 switch (type) {
53 case XFRMA_ALG_AUTH:
1da177e4 54 case XFRMA_ALG_CRYPT:
1da177e4 55 case XFRMA_ALG_COMP:
1da177e4
LT		 56 break;
57
58 default:
59 return -EINVAL;
3ff50b79 60 }
1da177e4
LT		 61
62 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
63 return 0;
64}
65
4447bb33
MW		 66static int verify_auth_trunc(struct nlattr **attrs)
67{
68 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
69 struct xfrm_algo_auth *algp;
70
71 if (!rt)
72 return 0;
73
74 algp = nla_data(rt);
75 if (nla_len(rt) < xfrm_alg_auth_len(algp))
76 return -EINVAL;
77
78 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
79 return 0;
80}
81
1a6509d9
HX		 82static int verify_aead(struct nlattr **attrs)
83{
84 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
85 struct xfrm_algo_aead *algp;
86
87 if (!rt)
88 return 0;
89
90 algp = nla_data(rt);
91 if (nla_len(rt) < aead_len(algp))
92 return -EINVAL;
93
94 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
95 return 0;
96}
97
5424f32e 98static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 99 xfrm_address_t **addrp)
100{
5424f32e 101 struct nlattr *rt = attrs[type];
eb2971b6 102
cf5cb79f 103 if (rt && addrp)
5424f32e 104 *addrp = nla_data(rt);
eb2971b6 105}
df71837d 106
5424f32e 107static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 108{
5424f32e 109 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 110 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 111
112 if (!rt)
113 return 0;
114
5424f32e 115 uctx = nla_data(rt);
cf5cb79f 116 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 117 return -EINVAL;
118
119 return 0;
120}
121
d8647b79
SK		 122static inline int verify_replay(struct xfrm_usersa_info *p,
123 struct nlattr **attrs)
124{
125 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 126 struct xfrm_replay_state_esn *rs;
d8647b79 127
ecd79187
MK		 128 if (p->flags & XFRM_STATE_ESN) {
129 if (!rt)
130 return -EINVAL;
131
132 rs = nla_data(rt);
133
134 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
135 return -EINVAL;
136
137 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
138 nla_len(rt) != sizeof(*rs))
139 return -EINVAL;
140 }
7833aa05 141
d8647b79
SK		 142 if (!rt)
143 return 0;
144
02aadf72
SK		 145 if (p->id.proto != IPPROTO_ESP)
146 return -EINVAL;
147
d8647b79
SK		 148 if (p->replay_window != 0)
149 return -EINVAL;
150
151 return 0;
152}
df71837d 153
1da177e4 154static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 155 struct nlattr **attrs)
1da177e4
LT		 156{
157 int err;
158
159 err = -EINVAL;
160 switch (p->family) {
161 case AF_INET:
162 break;
163
164 case AF_INET6:
dfd56b8b 165#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 166 break;
167#else
168 err = -EAFNOSUPPORT;
169 goto out;
170#endif
171
172 default:
173 goto out;
3ff50b79 174 }
1da177e4
LT		 175
176 err = -EINVAL;
177 switch (p->id.proto) {
178 case IPPROTO_AH:
4447bb33
MW		 179 if ((!attrs[XFRMA_ALG_AUTH] &&
180 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 181 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 182 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 183 attrs[XFRMA_ALG_COMP] ||
ea9884b3
FD		 184 attrs[XFRMA_TFCPAD] ||
185 (ntohl(p->id.spi) >= 0x10000))
186
1da177e4
LT		 187 goto out;
188 break;
189
190 case IPPROTO_ESP:
1a6509d9
HX		 191 if (attrs[XFRMA_ALG_COMP])
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])
197 goto out;
198 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 199 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 200 attrs[XFRMA_ALG_CRYPT]) &&
201 attrs[XFRMA_ALG_AEAD])
1da177e4 202 goto out;
35d2856b
MW		 203 if (attrs[XFRMA_TFCPAD] &&
204 p->mode != XFRM_MODE_TUNNEL)
205 goto out;
1da177e4
LT		 206 break;
207
208 case IPPROTO_COMP:
35a7aa08 209 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 210 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 211 attrs[XFRMA_ALG_AUTH] ||
4447bb33 212 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b
MW		 213 attrs[XFRMA_ALG_CRYPT] ||
214 attrs[XFRMA_TFCPAD])
1da177e4
LT		 215 goto out;
216 break;
217
dfd56b8b 218#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 219 case IPPROTO_DSTOPTS:
220 case IPPROTO_ROUTING:
35a7aa08
TG		 221 if (attrs[XFRMA_ALG_COMP] ||
222 attrs[XFRMA_ALG_AUTH] ||
4447bb33 223 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 224 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 225 attrs[XFRMA_ALG_CRYPT] ||
226 attrs[XFRMA_ENCAP] ||
227 attrs[XFRMA_SEC_CTX] ||
35d2856b 228 attrs[XFRMA_TFCPAD] ||
35a7aa08 229 !attrs[XFRMA_COADDR])
e23c7194
MN		 230 goto out;
231 break;
232#endif
233
1da177e4
LT		 234 default:
235 goto out;
3ff50b79 236 }
1da177e4 237
1a6509d9
HX		 238 if ((err = verify_aead(attrs)))
239 goto out;
4447bb33
MW		 240 if ((err = verify_auth_trunc(attrs)))
241 goto out;
35a7aa08 242 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 243 goto out;
35a7aa08 244 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 245 goto out;
35a7aa08 246 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 247 goto out;
35a7aa08 248 if ((err = verify_sec_ctx_len(attrs)))
df71837d 249 goto out;
d8647b79
SK		 250 if ((err = verify_replay(p, attrs)))
251 goto out;
1da177e4
LT		 252
253 err = -EINVAL;
254 switch (p->mode) {
7e49e6de
MN		 255 case XFRM_MODE_TRANSPORT:
256 case XFRM_MODE_TUNNEL:
060f02a3 257 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 258 case XFRM_MODE_BEET:
1da177e4
LT		 259 break;
260
261 default:
262 goto out;
3ff50b79 263 }
1da177e4
LT		 264
265 err = 0;
266
267out:
268 return err;
269}
270
271static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 272 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 273 struct nlattr *rta)
1da177e4 274{
1da177e4
LT		 275 struct xfrm_algo *p, *ualg;
276 struct xfrm_algo_desc *algo;
277
278 if (!rta)
279 return 0;
280
5424f32e 281 ualg = nla_data(rta);
1da177e4
LT		 282
283 algo = get_byname(ualg->alg_name, 1);
284 if (!algo)
285 return -ENOSYS;
286 *props = algo->desc.sadb_alg_id;
287
0f99be0d 288 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 289 if (!p)
290 return -ENOMEM;
291
04ff1260 292 strcpy(p->alg_name, algo->name);
1da177e4
LT		 293 *algpp = p;
294 return 0;
295}
296
4447bb33
MW		 297static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
298 struct nlattr *rta)
299{
300 struct xfrm_algo *ualg;
301 struct xfrm_algo_auth *p;
302 struct xfrm_algo_desc *algo;
303
304 if (!rta)
305 return 0;
306
307 ualg = nla_data(rta);
308
309 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
310 if (!algo)
311 return -ENOSYS;
312 *props = algo->desc.sadb_alg_id;
313
314 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
315 if (!p)
316 return -ENOMEM;
317
318 strcpy(p->alg_name, algo->name);
319 p->alg_key_len = ualg->alg_key_len;
320 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
321 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
322
323 *algpp = p;
324 return 0;
325}
326
327static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
328 struct nlattr *rta)
329{
330 struct xfrm_algo_auth *p, *ualg;
331 struct xfrm_algo_desc *algo;
332
333 if (!rta)
334 return 0;
335
336 ualg = nla_data(rta);
337
338 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
339 if (!algo)
340 return -ENOSYS;
fa6dd8a2
ND		 341 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
342 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 343 return -EINVAL;
344 *props = algo->desc.sadb_alg_id;
345
346 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
347 if (!p)
348 return -ENOMEM;
349
350 strcpy(p->alg_name, algo->name);
351 if (!p->alg_trunc_len)
352 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
353
354 *algpp = p;
355 return 0;
356}
357
1a6509d9
HX		 358static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
359 struct nlattr *rta)
360{
361 struct xfrm_algo_aead *p, *ualg;
362 struct xfrm_algo_desc *algo;
363
364 if (!rta)
365 return 0;
366
367 ualg = nla_data(rta);
368
369 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
370 if (!algo)
371 return -ENOSYS;
372 *props = algo->desc.sadb_alg_id;
373
374 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
375 if (!p)
376 return -ENOMEM;
377
378 strcpy(p->alg_name, algo->name);
379 *algpp = p;
380 return 0;
381}
382
e2b19125
SK		 383static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
384 struct nlattr *rp)
385{
386 struct xfrm_replay_state_esn *up;
ecd79187 387 int ulen;
e2b19125
SK		 388
389 if (!replay_esn || !rp)
390 return 0;
391
392 up = nla_data(rp);
ecd79187 393 ulen = xfrm_replay_state_esn_len(up);
e2b19125 394
ecd79187 395 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
e2b19125
SK		 396 return -EINVAL;
397
398 return 0;
399}
400
d8647b79
SK		 401static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
402 struct xfrm_replay_state_esn **preplay_esn,
403 struct nlattr *rta)
404{
405 struct xfrm_replay_state_esn *p, *pp, *up;
ecd79187 406 int klen, ulen;
d8647b79
SK		 407
408 if (!rta)
409 return 0;
410
411 up = nla_data(rta);
ecd79187
MK		 412 klen = xfrm_replay_state_esn_len(up);
413 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
d8647b79 414
ecd79187 415 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 416 if (!p)
417 return -ENOMEM;
418
ecd79187 419 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 420 if (!pp) {
421 kfree(p);
422 return -ENOMEM;
423 }
424
ecd79187
MK		 425 memcpy(p, up, ulen);
426 memcpy(pp, up, ulen);
427
d8647b79
SK		 428 *replay_esn = p;
429 *preplay_esn = pp;
430
431 return 0;
432}
433
661697f7 434static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 435{
df71837d
TJ		 436 int len = 0;
437
438 if (xfrm_ctx) {
439 len += sizeof(struct xfrm_user_sec_ctx);
440 len += xfrm_ctx->ctx_len;
441 }
442 return len;
443}
444
1da177e4
LT		 445static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
446{
447 memcpy(&x->id, &p->id, sizeof(x->id));
448 memcpy(&x->sel, &p->sel, sizeof(x->sel));
449 memcpy(&x->lft, &p->lft, sizeof(x->lft));
450 x->props.mode = p->mode;
33fce60d
FD		 451 x->props.replay_window = min_t(unsigned int, p->replay_window,
452 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 453 x->props.reqid = p->reqid;
454 x->props.family = p->family;
54489c14 455 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 456 x->props.flags = p->flags;
196b0036 457
ccf9b3b8 458 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 459 x->sel.family = p->family;
1da177e4
LT		 460}
461
d51d081d
JHS		 462/*
463 * someday when pfkey also has support, we could have the code
464 * somehow made shareable and move it to xfrm_state.c - JHS
465 *
466*/
e3ac104d
MK		 467static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
468 int update_esn)
d51d081d 469{
5424f32e 470 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 471 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 472 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
473 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
474 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 475
d8647b79
SK		 476 if (re) {
477 struct xfrm_replay_state_esn *replay_esn;
478 replay_esn = nla_data(re);
479 memcpy(x->replay_esn, replay_esn,
480 xfrm_replay_state_esn_len(replay_esn));
481 memcpy(x->preplay_esn, replay_esn,
482 xfrm_replay_state_esn_len(replay_esn));
483 }
484
d51d081d
JHS		 485 if (rp) {
486 struct xfrm_replay_state *replay;
5424f32e 487 replay = nla_data(rp);
d51d081d
JHS		 488 memcpy(&x->replay, replay, sizeof(*replay));
489 memcpy(&x->preplay, replay, sizeof(*replay));
490 }
491
492 if (lt) {
493 struct xfrm_lifetime_cur *ltime;
5424f32e 494 ltime = nla_data(lt);
d51d081d
JHS		 495 x->curlft.bytes = ltime->bytes;
496 x->curlft.packets = ltime->packets;
497 x->curlft.add_time = ltime->add_time;
498 x->curlft.use_time = ltime->use_time;
499 }
500
cf5cb79f 501 if (et)
5424f32e 502 x->replay_maxage = nla_get_u32(et);
d51d081d 503
cf5cb79f 504 if (rt)
5424f32e 505 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 506}
507
fc34acd3
AD		 508static struct xfrm_state *xfrm_state_construct(struct net *net,
509 struct xfrm_usersa_info *p,
5424f32e 510 struct nlattr **attrs,
1da177e4
LT		 511 int *errp)
512{
fc34acd3 513 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 514 int err = -ENOMEM;
515
516 if (!x)
517 goto error_no_put;
518
519 copy_from_user_state(x, p);
520
a947b0a9
ND		 521 if (attrs[XFRMA_SA_EXTRA_FLAGS])
522 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
523
1a6509d9
HX		 524 if ((err = attach_aead(&x->aead, &x->props.ealgo,
525 attrs[XFRMA_ALG_AEAD])))
526 goto error;
4447bb33
MW		 527 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
528 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 529 goto error;
4447bb33
MW		 530 if (!x->props.aalgo) {
531 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
532 attrs[XFRMA_ALG_AUTH])))
533 goto error;
534 }
1da177e4
LT		 535 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
536 xfrm_ealg_get_byname,
35a7aa08 537 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 538 goto error;
539 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
540 xfrm_calg_get_byname,
35a7aa08 541 attrs[XFRMA_ALG_COMP])))
1da177e4 542 goto error;
fd21150a
TG		 543
544 if (attrs[XFRMA_ENCAP]) {
545 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
546 sizeof(*x->encap), GFP_KERNEL);
547 if (x->encap == NULL)
548 goto error;
549 }
550
35d2856b
MW		 551 if (attrs[XFRMA_TFCPAD])
552 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
553
fd21150a
TG		 554 if (attrs[XFRMA_COADDR]) {
555 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
556 sizeof(*x->coaddr), GFP_KERNEL);
557 if (x->coaddr == NULL)
558 goto error;
559 }
560
6f26b61e
JHS		 561 xfrm_mark_get(attrs, &x->mark);
562
a454f0cc 563 err = __xfrm_init_state(x, false);
1da177e4
LT		 564 if (err)
565 goto error;
566
fd21150a
TG		 567 if (attrs[XFRMA_SEC_CTX] &&
568 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 569 goto error;
570
d8647b79
SK		 571 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
572 attrs[XFRMA_REPLAY_ESN_VAL])))
573 goto error;
574
1da177e4 575 x->km.seq = p->seq;
b27aeadb 576 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 577 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 578 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 579
9fdc4883
SK		 580 if ((err = xfrm_init_replay(x)))
581 goto error;
d51d081d 582
9fdc4883 583 /* override default values from above */
e3ac104d 584 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 585
586 return x;
587
588error:
589 x->km.state = XFRM_STATE_DEAD;
590 xfrm_state_put(x);
591error_no_put:
592 *errp = err;
593 return NULL;
594}
595
22e70050 596static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 597 struct nlattr **attrs)
1da177e4 598{
fc34acd3 599 struct net *net = sock_net(skb->sk);
7b67c857 600 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 601 struct xfrm_state *x;
602 int err;
26b15dad 603 struct km_event c;
e1760bd5 604 kuid_t loginuid = audit_get_loginuid(current);
4440e854 605 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 606 u32 sid;
1da177e4 607
35a7aa08 608 err = verify_newsa_info(p, attrs);
1da177e4
LT		 609 if (err)
610 return err;
611
fc34acd3 612 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 613 if (!x)
614 return err;
615
26b15dad 616 xfrm_state_hold(x);
1da177e4
LT		 617 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
618 err = xfrm_state_add(x);
619 else
620 err = xfrm_state_update(x);
621
c53fa1ed 622 security_task_getsecid(current, &sid);
2532386f 623 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 624
1da177e4
LT		 625 if (err < 0) {
626 x->km.state = XFRM_STATE_DEAD;
21380b81 627 __xfrm_state_put(x);
7d6dfe1f 628 goto out;
1da177e4
LT		 629 }
630
26b15dad 631 c.seq = nlh->nlmsg_seq;
15e47304 632 c.portid = nlh->nlmsg_pid;
f60f6b8f 633 c.event = nlh->nlmsg_type;
26b15dad
JHS		 634
635 km_state_notify(x, &c);
7d6dfe1f 636out:
26b15dad 637 xfrm_state_put(x);
1da177e4
LT		 638 return err;
639}
640
fc34acd3
AD		 641static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
642 struct xfrm_usersa_id *p,
5424f32e 643 struct nlattr **attrs,
eb2971b6
MN		 644 int *errp)
645{
646 struct xfrm_state *x = NULL;
6f26b61e 647 struct xfrm_mark m;
eb2971b6 648 int err;
6f26b61e 649 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 650
651 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
652 err = -ESRCH;
6f26b61e 653 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 654 } else {
655 xfrm_address_t *saddr = NULL;
656
35a7aa08 657 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 658 if (!saddr) {
659 err = -EINVAL;
660 goto out;
661 }
662
9abbffee 663 err = -ESRCH;
6f26b61e
JHS		 664 x = xfrm_state_lookup_byaddr(net, mark,
665 &p->daddr, saddr,
221df1ed 666 p->proto, p->family);
eb2971b6
MN		 667 }
668
669 out:
670 if (!x && errp)
671 *errp = err;
672 return x;
673}
674
22e70050 675static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 676 struct nlattr **attrs)
1da177e4 677{
fc34acd3 678 struct net *net = sock_net(skb->sk);
1da177e4 679 struct xfrm_state *x;
eb2971b6 680 int err = -ESRCH;
26b15dad 681 struct km_event c;
7b67c857 682 struct xfrm_usersa_id *p = nlmsg_data(nlh);
e1760bd5 683 kuid_t loginuid = audit_get_loginuid(current);
4440e854 684 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 685 u32 sid;
1da177e4 686
fc34acd3 687 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 688 if (x == NULL)
eb2971b6 689 return err;
1da177e4 690
6f68dc37 691 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 692 goto out;
693
1da177e4 694 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 695 err = -EPERM;
696 goto out;
1da177e4
LT		 697 }
698
26b15dad 699 err = xfrm_state_delete(x);
161a09e7 700
c8c05a8e
CZ		 701 if (err < 0)
702 goto out;
26b15dad
JHS		 703
704 c.seq = nlh->nlmsg_seq;
15e47304 705 c.portid = nlh->nlmsg_pid;
f60f6b8f 706 c.event = nlh->nlmsg_type;
26b15dad 707 km_state_notify(x, &c);
1da177e4 708
c8c05a8e 709out:
c53fa1ed 710 security_task_getsecid(current, &sid);
2532386f 711 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 712 xfrm_state_put(x);
26b15dad 713 return err;
1da177e4
LT		 714}
715
716static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
717{
f778a636 718 memset(p, 0, sizeof(*p));
1da177e4
LT		 719 memcpy(&p->id, &x->id, sizeof(p->id));
720 memcpy(&p->sel, &x->sel, sizeof(p->sel));
721 memcpy(&p->lft, &x->lft, sizeof(p->lft));
722 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
723 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 724 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 725 p->mode = x->props.mode;
726 p->replay_window = x->props.replay_window;
727 p->reqid = x->props.reqid;
728 p->family = x->props.family;
729 p->flags = x->props.flags;
730 p->seq = x->km.seq;
731}
732
733struct xfrm_dump_info {
734 struct sk_buff *in_skb;
735 struct sk_buff *out_skb;
736 u32 nlmsg_seq;
737 u16 nlmsg_flags;
1da177e4
LT		 738};
739
c0144bea
TG		 740static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
741{
c0144bea
TG		 742 struct xfrm_user_sec_ctx *uctx;
743 struct nlattr *attr;
68325d3b 744 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 745
746 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
747 if (attr == NULL)
748 return -EMSGSIZE;
749
750 uctx = nla_data(attr);
751 uctx->exttype = XFRMA_SEC_CTX;
752 uctx->len = ctx_size;
753 uctx->ctx_doi = s->ctx_doi;
754 uctx->ctx_alg = s->ctx_alg;
755 uctx->ctx_len = s->ctx_len;
756 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
757
758 return 0;
759}
760
4447bb33
MW		 761static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
762{
763 struct xfrm_algo *algo;
764 struct nlattr *nla;
765
766 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
767 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
768 if (!nla)
769 return -EMSGSIZE;
770
771 algo = nla_data(nla);
4c87308b 772 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 773 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
774 algo->alg_key_len = auth->alg_key_len;
775
776 return 0;
777}
778
68325d3b
HX		 779/* Don't change this without updating xfrm_sa_len! */
780static int copy_to_user_state_extra(struct xfrm_state *x,
781 struct xfrm_usersa_info *p,
782 struct sk_buff *skb)
1da177e4 783{
1d1e34dd 784 int ret = 0;
d0fde795 785
1d1e34dd 786 copy_to_user_state(x, p);
68325d3b 787
a947b0a9
ND		 788 if (x->props.extra_flags) {
789 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
790 x->props.extra_flags);
791 if (ret)
792 goto out;
793 }
794
1d1e34dd
DM		 795 if (x->coaddr) {
796 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
797 if (ret)
798 goto out;
799 }
800 if (x->lastused) {
801 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
802 if (ret)
803 goto out;
804 }
805 if (x->aead) {
806 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
807 if (ret)
808 goto out;
809 }
810 if (x->aalg) {
811 ret = copy_to_user_auth(x->aalg, skb);
812 if (!ret)
813 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
814 xfrm_alg_auth_len(x->aalg), x->aalg);
815 if (ret)
816 goto out;
817 }
818 if (x->ealg) {
819 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
820 if (ret)
821 goto out;
822 }
823 if (x->calg) {
824 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
825 if (ret)
826 goto out;
827 }
828 if (x->encap) {
829 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
830 if (ret)
831 goto out;
832 }
833 if (x->tfcpad) {
834 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
835 if (ret)
836 goto out;
837 }
838 ret = xfrm_mark_put(skb, &x->mark);
839 if (ret)
840 goto out;
841 if (x->replay_esn) {
842 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
843 xfrm_replay_state_esn_len(x->replay_esn),
844 x->replay_esn);
845 if (ret)
846 goto out;
847 }
848 if (x->security)
849 ret = copy_sec_ctx(x->security, skb);
850out:
851 return ret;
68325d3b
HX		 852}
853
854static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
855{
856 struct xfrm_dump_info *sp = ptr;
857 struct sk_buff *in_skb = sp->in_skb;
858 struct sk_buff *skb = sp->out_skb;
859 struct xfrm_usersa_info *p;
860 struct nlmsghdr *nlh;
861 int err;
862
15e47304 863 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 864 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
865 if (nlh == NULL)
866 return -EMSGSIZE;
867
868 p = nlmsg_data(nlh);
869
870 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 871 if (err) {
872 nlmsg_cancel(skb, nlh);
873 return err;
874 }
9825069d 875 nlmsg_end(skb, nlh);
1da177e4 876 return 0;
1da177e4
LT		 877}
878
4c563f76
TT		 879static int xfrm_dump_sa_done(struct netlink_callback *cb)
880{
881 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 882 struct sock *sk = cb->skb->sk;
883 struct net *net = sock_net(sk);
884
885 xfrm_state_walk_done(walk, net);
4c563f76
TT		 886 return 0;
887}
888
1da177e4
LT		 889static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
890{
fc34acd3 891 struct net *net = sock_net(skb->sk);
4c563f76 892 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 893 struct xfrm_dump_info info;
894
4c563f76
TT		 895 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
896 sizeof(cb->args) - sizeof(cb->args[0]));
897
1da177e4
LT		 898 info.in_skb = cb->skb;
899 info.out_skb = skb;
900 info.nlmsg_seq = cb->nlh->nlmsg_seq;
901 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 902
903 if (!cb->args[0]) {
904 cb->args[0] = 1;
905 xfrm_state_walk_init(walk, 0);
906 }
907
fc34acd3 908 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 909
910 return skb->len;
911}
912
913static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
914 struct xfrm_state *x, u32 seq)
915{
916 struct xfrm_dump_info info;
917 struct sk_buff *skb;
864745d2 918 int err;
1da177e4 919
7deb2264 920 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 921 if (!skb)
922 return ERR_PTR(-ENOMEM);
923
1da177e4
LT		 924 info.in_skb = in_skb;
925 info.out_skb = skb;
926 info.nlmsg_seq = seq;
927 info.nlmsg_flags = 0;
1da177e4 928
864745d2
MK		 929 err = dump_one_state(x, 0, &info);
930 if (err) {
1da177e4 931 kfree_skb(skb);
864745d2 932 return ERR_PTR(err);
1da177e4
LT		 933 }
934
935 return skb;
936}
937
7deb2264
TG		 938static inline size_t xfrm_spdinfo_msgsize(void)
939{
940 return NLMSG_ALIGN(4)
941 + nla_total_size(sizeof(struct xfrmu_spdinfo))
942 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
943}
944
e071041b 945static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 946 u32 portid, u32 seq, u32 flags)
ecfd6b18 947{
5a6d3416
JHS		 948 struct xfrmk_spdinfo si;
949 struct xfrmu_spdinfo spc;
950 struct xfrmu_spdhinfo sph;
ecfd6b18 951 struct nlmsghdr *nlh;
1d1e34dd 952 int err;
ecfd6b18
JHS		 953 u32 *f;
954
15e47304 955 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 956 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 957 return -EMSGSIZE;
958
959 f = nlmsg_data(nlh);
960 *f = flags;
e071041b 961 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 962 spc.incnt = si.incnt;
963 spc.outcnt = si.outcnt;
964 spc.fwdcnt = si.fwdcnt;
965 spc.inscnt = si.inscnt;
966 spc.outscnt = si.outscnt;
967 spc.fwdscnt = si.fwdscnt;
968 sph.spdhcnt = si.spdhcnt;
969 sph.spdhmcnt = si.spdhmcnt;
970
1d1e34dd
DM		 971 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
972 if (!err)
973 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
974 if (err) {
975 nlmsg_cancel(skb, nlh);
976 return err;
977 }
ecfd6b18
JHS		 978
979 return nlmsg_end(skb, nlh);
ecfd6b18
JHS		 980}
981
982static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 983 struct nlattr **attrs)
ecfd6b18 984{
a6483b79 985 struct net *net = sock_net(skb->sk);
ecfd6b18 986 struct sk_buff *r_skb;
7b67c857 987 u32 *flags = nlmsg_data(nlh);
15e47304 988 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 989 u32 seq = nlh->nlmsg_seq;
ecfd6b18 990
7deb2264 991 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 992 if (r_skb == NULL)
993 return -ENOMEM;
994
15e47304 995 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 996 BUG();
997
15e47304 998 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 999}
1000
7deb2264
TG		 1001static inline size_t xfrm_sadinfo_msgsize(void)
1002{
1003 return NLMSG_ALIGN(4)
1004 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1005 + nla_total_size(4); /* XFRMA_SAD_CNT */
1006}
1007
e071041b 1008static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1009 u32 portid, u32 seq, u32 flags)
28d8909b 1010{
af11e316
JHS		 1011 struct xfrmk_sadinfo si;
1012 struct xfrmu_sadhinfo sh;
28d8909b 1013 struct nlmsghdr *nlh;
1d1e34dd 1014 int err;
28d8909b
JHS		 1015 u32 *f;
1016
15e47304 1017 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1018 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1019 return -EMSGSIZE;
1020
1021 f = nlmsg_data(nlh);
1022 *f = flags;
e071041b 1023 xfrm_sad_getinfo(net, &si);
28d8909b 1024
af11e316
JHS		 1025 sh.sadhmcnt = si.sadhmcnt;
1026 sh.sadhcnt = si.sadhcnt;
1027
1d1e34dd
DM		 1028 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1029 if (!err)
1030 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1031 if (err) {
1032 nlmsg_cancel(skb, nlh);
1033 return err;
1034 }
28d8909b
JHS		 1035
1036 return nlmsg_end(skb, nlh);
28d8909b
JHS		 1037}
1038
1039static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1040 struct nlattr **attrs)
28d8909b 1041{
a6483b79 1042 struct net *net = sock_net(skb->sk);
28d8909b 1043 struct sk_buff *r_skb;
7b67c857 1044 u32 *flags = nlmsg_data(nlh);
15e47304 1045 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1046 u32 seq = nlh->nlmsg_seq;
28d8909b 1047
7deb2264 1048 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1049 if (r_skb == NULL)
1050 return -ENOMEM;
1051
15e47304 1052 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1053 BUG();
1054
15e47304 1055 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1056}
1057
22e70050 1058static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1059 struct nlattr **attrs)
1da177e4 1060{
fc34acd3 1061 struct net *net = sock_net(skb->sk);
7b67c857 1062 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1063 struct xfrm_state *x;
1064 struct sk_buff *resp_skb;
eb2971b6 1065 int err = -ESRCH;
1da177e4 1066
fc34acd3 1067 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1068 if (x == NULL)
1069 goto out_noput;
1070
1071 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1072 if (IS_ERR(resp_skb)) {
1073 err = PTR_ERR(resp_skb);
1074 } else {
15e47304 1075 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1076 }
1077 xfrm_state_put(x);
1078out_noput:
1079 return err;
1080}
1081
22e70050 1082static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1083 struct nlattr **attrs)
1da177e4 1084{
fc34acd3 1085 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1086 struct xfrm_state *x;
1087 struct xfrm_userspi_info *p;
1088 struct sk_buff *resp_skb;
1089 xfrm_address_t *daddr;
1090 int family;
1091 int err;
6f26b61e
JHS		 1092 u32 mark;
1093 struct xfrm_mark m;
1da177e4 1094
7b67c857 1095 p = nlmsg_data(nlh);
776e9dd9 1096 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1097 if (err)
1098 goto out_noput;
1099
1100 family = p->info.family;
1101 daddr = &p->info.id.daddr;
1102
1103 x = NULL;
6f26b61e
JHS		 1104
1105 mark = xfrm_mark_get(attrs, &m);
1da177e4 1106 if (p->info.seq) {
6f26b61e 1107 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1108 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1109 xfrm_state_put(x);
1110 x = NULL;
1111 }
1112 }
1113
1114 if (!x)
6f26b61e 1115 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1116 p->info.id.proto, daddr,
1117 &p->info.saddr, 1,
1118 family);
1119 err = -ENOENT;
1120 if (x == NULL)
1121 goto out_noput;
1122
658b219e
HX		 1123 err = xfrm_alloc_spi(x, p->min, p->max);
1124 if (err)
1125 goto out;
1da177e4 1126
658b219e 1127 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1128 if (IS_ERR(resp_skb)) {
1129 err = PTR_ERR(resp_skb);
1130 goto out;
1131 }
1132
15e47304 1133 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1134
1135out:
1136 xfrm_state_put(x);
1137out_noput:
1138 return err;
1139}
1140
b798a9ed 1141static int verify_policy_dir(u8 dir)
1da177e4
LT		 1142{
1143 switch (dir) {
1144 case XFRM_POLICY_IN:
1145 case XFRM_POLICY_OUT:
1146 case XFRM_POLICY_FWD:
1147 break;
1148
1149 default:
1150 return -EINVAL;
3ff50b79 1151 }
1da177e4
LT		 1152
1153 return 0;
1154}
1155
b798a9ed 1156static int verify_policy_type(u8 type)
f7b6983f
MN		 1157{
1158 switch (type) {
1159 case XFRM_POLICY_TYPE_MAIN:
1160#ifdef CONFIG_XFRM_SUB_POLICY
1161 case XFRM_POLICY_TYPE_SUB:
1162#endif
1163 break;
1164
1165 default:
1166 return -EINVAL;
3ff50b79 1167 }
f7b6983f
MN		 1168
1169 return 0;
1170}
1171
1da177e4
LT		 1172static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1173{
e682adf0
FD		 1174 int ret;
1175
1da177e4
LT		 1176 switch (p->share) {
1177 case XFRM_SHARE_ANY:
1178 case XFRM_SHARE_SESSION:
1179 case XFRM_SHARE_USER:
1180 case XFRM_SHARE_UNIQUE:
1181 break;
1182
1183 default:
1184 return -EINVAL;
3ff50b79 1185 }
1da177e4
LT		 1186
1187 switch (p->action) {
1188 case XFRM_POLICY_ALLOW:
1189 case XFRM_POLICY_BLOCK:
1190 break;
1191
1192 default:
1193 return -EINVAL;
3ff50b79 1194 }
1da177e4
LT		 1195
1196 switch (p->sel.family) {
1197 case AF_INET:
1198 break;
1199
1200 case AF_INET6:
dfd56b8b 1201#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1202 break;
1203#else
1204 return -EAFNOSUPPORT;
1205#endif
1206
1207 default:
1208 return -EINVAL;
3ff50b79 1209 }
1da177e4 1210
e682adf0
FD		 1211 ret = verify_policy_dir(p->dir);
1212 if (ret)
1213 return ret;
1214 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1215 return -EINVAL;
1216
1217 return 0;
1da177e4
LT		 1218}
1219
5424f32e 1220static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1221{
5424f32e 1222 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1223 struct xfrm_user_sec_ctx *uctx;
1224
1225 if (!rt)
1226 return 0;
1227
5424f32e 1228 uctx = nla_data(rt);
03e1ad7b 1229 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 1230}
1231
1da177e4
LT		 1232static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1233 int nr)
1234{
1235 int i;
1236
1237 xp->xfrm_nr = nr;
1238 for (i = 0; i < nr; i++, ut++) {
1239 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1240
1241 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1242 memcpy(&t->saddr, &ut->saddr,
1243 sizeof(xfrm_address_t));
1244 t->reqid = ut->reqid;
1245 t->mode = ut->mode;
1246 t->share = ut->share;
1247 t->optional = ut->optional;
1248 t->aalgos = ut->aalgos;
1249 t->ealgos = ut->ealgos;
1250 t->calgos = ut->calgos;
c5d18e98
HX		 1251 /* If all masks are ~0, then we allow all algorithms. */
1252 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1253 t->encap_family = ut->family;
1da177e4
LT		 1254 }
1255}
1256
b4ad86bf
DM		 1257static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1258{
1259 int i;
1260
1261 if (nr > XFRM_MAX_DEPTH)
1262 return -EINVAL;
1263
1264 for (i = 0; i < nr; i++) {
1265 /* We never validated the ut->family value, so many
1266 * applications simply leave it at zero. The check was
1267 * never made and ut->family was ignored because all
1268 * templates could be assumed to have the same family as
1269 * the policy itself. Now that we will have ipv4-in-ipv6
1270 * and ipv6-in-ipv4 tunnels, this is no longer true.
1271 */
1272 if (!ut[i].family)
1273 ut[i].family = family;
1274
1275 switch (ut[i].family) {
1276 case AF_INET:
1277 break;
dfd56b8b 1278#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1279 case AF_INET6:
1280 break;
1281#endif
1282 default:
1283 return -EINVAL;
3ff50b79 1284 }
b4ad86bf
DM		 1285 }
1286
1287 return 0;
1288}
1289
5424f32e 1290static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1291{
5424f32e 1292 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1293
1294 if (!rt) {
1295 pol->xfrm_nr = 0;
1296 } else {
5424f32e
TG		 1297 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1298 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1299 int err;
1da177e4 1300
b4ad86bf
DM		 1301 err = validate_tmpl(nr, utmpl, pol->family);
1302 if (err)
1303 return err;
1da177e4 1304
5424f32e 1305 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1306 }
1307 return 0;
1308}
1309
5424f32e 1310static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1311{
5424f32e 1312 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1313 struct xfrm_userpolicy_type *upt;
b798a9ed 1314 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1315 int err;
1316
1317 if (rt) {
5424f32e 1318 upt = nla_data(rt);
f7b6983f
MN		 1319 type = upt->type;
1320 }
1321
1322 err = verify_policy_type(type);
1323 if (err)
1324 return err;
1325
1326 *tp = type;
1327 return 0;
1328}
1329
1da177e4
LT		 1330static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1331{
1332 xp->priority = p->priority;
1333 xp->index = p->index;
1334 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1335 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1336 xp->action = p->action;
1337 xp->flags = p->flags;
1338 xp->family = p->sel.family;
1339 /* XXX xp->share = p->share; */
1340}
1341
1342static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1343{
7b789836 1344 memset(p, 0, sizeof(*p));
1da177e4
LT		 1345 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1346 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1347 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1348 p->priority = xp->priority;
1349 p->index = xp->index;
1350 p->sel.family = xp->family;
1351 p->dir = dir;
1352 p->action = xp->action;
1353 p->flags = xp->flags;
1354 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1355}
1356
fc34acd3 1357static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1358{
fc34acd3 1359 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1360 int err;
1361
1362 if (!xp) {
1363 *errp = -ENOMEM;
1364 return NULL;
1365 }
1366
1367 copy_from_user_policy(xp, p);
df71837d 1368
35a7aa08 1369 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1370 if (err)
1371 goto error;
1372
35a7aa08
TG		 1373 if (!(err = copy_from_user_tmpl(xp, attrs)))
1374 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1375 if (err)
1376 goto error;
1da177e4 1377
295fae56
JHS		 1378 xfrm_mark_get(attrs, &xp->mark);
1379
1da177e4 1380 return xp;
f7b6983f
MN		 1381 error:
1382 *errp = err;
12a169e7 1383 xp->walk.dead = 1;
64c31b3f 1384 xfrm_policy_destroy(xp);
f7b6983f 1385 return NULL;
1da177e4
LT		 1386}
1387
22e70050 1388static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1389 struct nlattr **attrs)
1da177e4 1390{
fc34acd3 1391 struct net *net = sock_net(skb->sk);
7b67c857 1392 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1393 struct xfrm_policy *xp;
26b15dad 1394 struct km_event c;
1da177e4
LT		 1395 int err;
1396 int excl;
e1760bd5 1397 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1398 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 1399 u32 sid;
1da177e4
LT		 1400
1401 err = verify_newpolicy_info(p);
df71837d
TJ		 1402 if (err)
1403 return err;
35a7aa08 1404 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1405 if (err)
1406 return err;
1407
fc34acd3 1408 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1409 if (!xp)
1410 return err;
1411
25985edc 1412 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1413 * Aha! this is anti-netlink really i.e more pfkey derived
1414 * in netlink excl is a flag and you wouldnt need
1415 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1416 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1417 err = xfrm_policy_insert(p->dir, xp, excl);
c53fa1ed 1418 security_task_getsecid(current, &sid);
2532386f 1419 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1420
1da177e4 1421 if (err) {
03e1ad7b 1422 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1423 kfree(xp);
1424 return err;
1425 }
1426
f60f6b8f 1427 c.event = nlh->nlmsg_type;
26b15dad 1428 c.seq = nlh->nlmsg_seq;
15e47304 1429 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1430 km_policy_notify(xp, p->dir, &c);
1431
1da177e4
LT		 1432 xfrm_pol_put(xp);
1433
1434 return 0;
1435}
1436
1437static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1438{
1439 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1440 int i;
1441
1442 if (xp->xfrm_nr == 0)
1443 return 0;
1444
1445 for (i = 0; i < xp->xfrm_nr; i++) {
1446 struct xfrm_user_tmpl *up = &vec[i];
1447 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1448
1f86840f 1449 memset(up, 0, sizeof(*up));
1da177e4 1450 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1451 up->family = kp->encap_family;
1da177e4
LT		 1452 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1453 up->reqid = kp->reqid;
1454 up->mode = kp->mode;
1455 up->share = kp->share;
1456 up->optional = kp->optional;
1457 up->aalgos = kp->aalgos;
1458 up->ealgos = kp->ealgos;
1459 up->calgos = kp->calgos;
1460 }
df71837d 1461
c0144bea
TG		 1462 return nla_put(skb, XFRMA_TMPL,
1463 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1464}
1465
1466static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1467{
1468 if (x->security) {
1469 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1470 }
1471 return 0;
0d681623 1472}
df71837d 1473
0d681623
SH		 1474static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1475{
1d1e34dd 1476 if (xp->security)
0d681623 1477 return copy_sec_ctx(xp->security, skb);
0d681623 1478 return 0;
df71837d 1479}
cfbfd45a
TG		 1480static inline size_t userpolicy_type_attrsize(void)
1481{
1482#ifdef CONFIG_XFRM_SUB_POLICY
1483 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1484#else
1485 return 0;
1486#endif
1487}
df71837d 1488
f7b6983f 1489#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1490static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1491{
c0144bea
TG		 1492 struct xfrm_userpolicy_type upt = {
1493 .type = type,
1494 };
f7b6983f 1495
c0144bea 1496 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1497}
1498
1499#else
b798a9ed 1500static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1501{
1502 return 0;
1503}
1504#endif
1505
1da177e4
LT		 1506static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1507{
1508 struct xfrm_dump_info *sp = ptr;
1509 struct xfrm_userpolicy_info *p;
1510 struct sk_buff *in_skb = sp->in_skb;
1511 struct sk_buff *skb = sp->out_skb;
1512 struct nlmsghdr *nlh;
1d1e34dd 1513 int err;
1da177e4 1514
15e47304 1515 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1516 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1517 if (nlh == NULL)
1518 return -EMSGSIZE;
1da177e4 1519
7b67c857 1520 p = nlmsg_data(nlh);
1da177e4 1521 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1522 err = copy_to_user_tmpl(xp, skb);
1523 if (!err)
1524 err = copy_to_user_sec_ctx(xp, skb);
1525 if (!err)
1526 err = copy_to_user_policy_type(xp->type, skb);
1527 if (!err)
1528 err = xfrm_mark_put(skb, &xp->mark);
1529 if (err) {
1530 nlmsg_cancel(skb, nlh);
1531 return err;
1532 }
9825069d 1533 nlmsg_end(skb, nlh);
1da177e4 1534 return 0;
1da177e4
LT		 1535}
1536
4c563f76
TT		 1537static int xfrm_dump_policy_done(struct netlink_callback *cb)
1538{
1539 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1540 struct net *net = sock_net(cb->skb->sk);
4c563f76 1541
283bc9f3 1542 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1543 return 0;
1544}
1545
1da177e4
LT		 1546static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1547{
fc34acd3 1548 struct net *net = sock_net(skb->sk);
4c563f76 1549 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1550 struct xfrm_dump_info info;
1551
4c563f76
TT		 1552 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1553 sizeof(cb->args) - sizeof(cb->args[0]));
1554
1da177e4
LT		 1555 info.in_skb = cb->skb;
1556 info.out_skb = skb;
1557 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1558 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1559
1560 if (!cb->args[0]) {
1561 cb->args[0] = 1;
1562 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1563 }
1564
fc34acd3 1565 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1566
1567 return skb->len;
1568}
1569
1570static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1571 struct xfrm_policy *xp,
1572 int dir, u32 seq)
1573{
1574 struct xfrm_dump_info info;
1575 struct sk_buff *skb;
c2546372 1576 int err;
1da177e4 1577
7deb2264 1578 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1579 if (!skb)
1580 return ERR_PTR(-ENOMEM);
1581
1da177e4
LT		 1582 info.in_skb = in_skb;
1583 info.out_skb = skb;
1584 info.nlmsg_seq = seq;
1585 info.nlmsg_flags = 0;
1da177e4 1586
c2546372
MK		 1587 err = dump_one_policy(xp, dir, 0, &info);
1588 if (err) {
1da177e4 1589 kfree_skb(skb);
c2546372 1590 return ERR_PTR(err);
1da177e4
LT		 1591 }
1592
1593 return skb;
1594}
1595
22e70050 1596static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1597 struct nlattr **attrs)
1da177e4 1598{
fc34acd3 1599 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1600 struct xfrm_policy *xp;
1601 struct xfrm_userpolicy_id *p;
b798a9ed 1602 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1603 int err;
26b15dad 1604 struct km_event c;
1da177e4 1605 int delete;
295fae56
JHS		 1606 struct xfrm_mark m;
1607 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1608
7b67c857 1609 p = nlmsg_data(nlh);
1da177e4
LT		 1610 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1611
35a7aa08 1612 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1613 if (err)
1614 return err;
1615
1da177e4
LT		 1616 err = verify_policy_dir(p->dir);
1617 if (err)
1618 return err;
1619
1620 if (p->index)
295fae56 1621 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1622 else {
5424f32e 1623 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1624 struct xfrm_sec_ctx *ctx;
df71837d 1625
35a7aa08 1626 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1627 if (err)
1628 return err;
1629
2c8dd116 1630 ctx = NULL;
df71837d 1631 if (rt) {
5424f32e 1632 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1633
03e1ad7b
PM		 1634 err = security_xfrm_policy_alloc(&ctx, uctx);
1635 if (err)
df71837d 1636 return err;
2c8dd116 1637 }
295fae56 1638 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1639 ctx, delete, &err);
03e1ad7b 1640 security_xfrm_policy_free(ctx);
df71837d 1641 }
1da177e4
LT		 1642 if (xp == NULL)
1643 return -ENOENT;
1644
1645 if (!delete) {
1646 struct sk_buff *resp_skb;
1647
1648 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1649 if (IS_ERR(resp_skb)) {
1650 err = PTR_ERR(resp_skb);
1651 } else {
a6483b79 1652 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1653 NETLINK_CB(skb).portid);
1da177e4 1654 }
26b15dad 1655 } else {
e1760bd5 1656 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1657 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 1658 u32 sid;
2532386f 1659
c53fa1ed 1660 security_task_getsecid(current, &sid);
2532386f
EP		 1661 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1662 sid);
13fcfbb0
DM		 1663
1664 if (err != 0)
c8c05a8e 1665 goto out;
13fcfbb0 1666
e7443892 1667 c.data.byid = p->index;
f60f6b8f 1668 c.event = nlh->nlmsg_type;
26b15dad 1669 c.seq = nlh->nlmsg_seq;
15e47304 1670 c.portid = nlh->nlmsg_pid;
26b15dad 1671 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1672 }
1673
c8c05a8e 1674out:
ef41aaa0 1675 xfrm_pol_put(xp);
e4c17216
PM		 1676 if (delete && err == 0)
1677 xfrm_garbage_collect(net);
1da177e4
LT		 1678 return err;
1679}
1680
22e70050 1681static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1682 struct nlattr **attrs)
1da177e4 1683{
fc34acd3 1684 struct net *net = sock_net(skb->sk);
26b15dad 1685 struct km_event c;
7b67c857 1686 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1687 struct xfrm_audit audit_info;
4aa2e62c 1688 int err;
1da177e4 1689
c53fa1ed
PM		 1690 audit_info.loginuid = audit_get_loginuid(current);
1691 audit_info.sessionid = audit_get_sessionid(current);
1692 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1693 err = xfrm_state_flush(net, p->proto, &audit_info);
9e64cc95
JHS		 1694 if (err) {
1695 if (err == -ESRCH) /* empty table */
1696 return 0;
069c474e 1697 return err;
9e64cc95 1698 }
bf08867f 1699 c.data.proto = p->proto;
f60f6b8f 1700 c.event = nlh->nlmsg_type;
26b15dad 1701 c.seq = nlh->nlmsg_seq;
15e47304 1702 c.portid = nlh->nlmsg_pid;
7067802e 1703 c.net = net;
26b15dad
JHS		 1704 km_state_notify(NULL, &c);
1705
1da177e4
LT		 1706 return 0;
1707}
1708
d8647b79 1709static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1710{
d8647b79
SK		 1711 size_t replay_size = x->replay_esn ?
1712 xfrm_replay_state_esn_len(x->replay_esn) :
1713 sizeof(struct xfrm_replay_state);
1714
7deb2264 1715 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1716 + nla_total_size(replay_size)
7deb2264 1717 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1718 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1719 + nla_total_size(4) /* XFRM_AE_RTHR */
1720 + nla_total_size(4); /* XFRM_AE_ETHR */
1721}
d51d081d 1722
214e005b 1723static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1724{
1725 struct xfrm_aevent_id *id;
1726 struct nlmsghdr *nlh;
1d1e34dd 1727 int err;
d51d081d 1728
15e47304 1729 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1730 if (nlh == NULL)
1731 return -EMSGSIZE;
d51d081d 1732
7b67c857 1733 id = nlmsg_data(nlh);
9b7a787d 1734 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1735 id->sa_id.spi = x->id.spi;
1736 id->sa_id.family = x->props.family;
1737 id->sa_id.proto = x->id.proto;
9b7a787d 1738 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1739 id->reqid = x->props.reqid;
d51d081d
JHS		 1740 id->flags = c->data.aevent;
1741
d0fde795 1742 if (x->replay_esn) {
1d1e34dd
DM		 1743 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1744 xfrm_replay_state_esn_len(x->replay_esn),
1745 x->replay_esn);
d0fde795 1746 } else {
1d1e34dd
DM		 1747 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1748 &x->replay);
d0fde795 1749 }
1d1e34dd
DM		 1750 if (err)
1751 goto out_cancel;
1752 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1753 if (err)
1754 goto out_cancel;
d51d081d 1755
1d1e34dd
DM		 1756 if (id->flags & XFRM_AE_RTHR) {
1757 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1758 if (err)
1759 goto out_cancel;
1760 }
1761 if (id->flags & XFRM_AE_ETHR) {
1762 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1763 x->replay_maxage * 10 / HZ);
1764 if (err)
1765 goto out_cancel;
1766 }
1767 err = xfrm_mark_put(skb, &x->mark);
1768 if (err)
1769 goto out_cancel;
6f26b61e 1770
9825069d 1771 return nlmsg_end(skb, nlh);
d51d081d 1772
1d1e34dd 1773out_cancel:
9825069d 1774 nlmsg_cancel(skb, nlh);
1d1e34dd 1775 return err;
d51d081d
JHS		 1776}
1777
22e70050 1778static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1779 struct nlattr **attrs)
d51d081d 1780{
fc34acd3 1781 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1782 struct xfrm_state *x;
1783 struct sk_buff *r_skb;
1784 int err;
1785 struct km_event c;
6f26b61e
JHS		 1786 u32 mark;
1787 struct xfrm_mark m;
7b67c857 1788 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1789 struct xfrm_usersa_id *id = &p->sa_id;
1790
6f26b61e
JHS		 1791 mark = xfrm_mark_get(attrs, &m);
1792
1793 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1794 if (x == NULL)
d51d081d 1795 return -ESRCH;
d8647b79
SK		 1796
1797 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1798 if (r_skb == NULL) {
1799 xfrm_state_put(x);
1800 return -ENOMEM;
d51d081d
JHS		 1801 }
1802
1803 /*
1804 * XXX: is this lock really needed - none of the other
1805 * gets lock (the concern is things getting updated
1806 * while we are still reading) - jhs
1807 */
1808 spin_lock_bh(&x->lock);
1809 c.data.aevent = p->flags;
1810 c.seq = nlh->nlmsg_seq;
15e47304 1811 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1812
1813 if (build_aevent(r_skb, x, &c) < 0)
1814 BUG();
15e47304 1815 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1816 spin_unlock_bh(&x->lock);
1817 xfrm_state_put(x);
1818 return err;
1819}
1820
22e70050 1821static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1822 struct nlattr **attrs)
d51d081d 1823{
fc34acd3 1824 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1825 struct xfrm_state *x;
1826 struct km_event c;
02d0892f 1827 int err = -EINVAL;
6f26b61e
JHS		 1828 u32 mark = 0;
1829 struct xfrm_mark m;
7b67c857 1830 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1831 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1832 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1833 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1834
d8647b79 1835 if (!lt && !rp && !re)
d51d081d
JHS		 1836 return err;
1837
1838 /* pedantic mode - thou shalt sayeth replaceth */
1839 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1840 return err;
1841
6f26b61e
JHS		 1842 mark = xfrm_mark_get(attrs, &m);
1843
1844 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1845 if (x == NULL)
1846 return -ESRCH;
1847
1848 if (x->km.state != XFRM_STATE_VALID)
1849 goto out;
1850
4479ff76 1851 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 1852 if (err)
1853 goto out;
1854
d51d081d 1855 spin_lock_bh(&x->lock);
e3ac104d 1856 xfrm_update_ae_params(x, attrs, 1);
d51d081d 1857 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1858
1859 c.event = nlh->nlmsg_type;
1860 c.seq = nlh->nlmsg_seq;
15e47304 1861 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1862 c.data.aevent = XFRM_AE_CU;
1863 km_state_notify(x, &c);
1864 err = 0;
1865out:
1866 xfrm_state_put(x);
1867 return err;
1868}
1869
22e70050 1870static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1871 struct nlattr **attrs)
1da177e4 1872{
fc34acd3 1873 struct net *net = sock_net(skb->sk);
f7b6983f 1874 struct km_event c;
b798a9ed 1875 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1876 int err;
161a09e7 1877 struct xfrm_audit audit_info;
f7b6983f 1878
35a7aa08 1879 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1880 if (err)
1881 return err;
26b15dad 1882
c53fa1ed
PM		 1883 audit_info.loginuid = audit_get_loginuid(current);
1884 audit_info.sessionid = audit_get_sessionid(current);
1885 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1886 err = xfrm_policy_flush(net, type, &audit_info);
2f1eb65f
JHS		 1887 if (err) {
1888 if (err == -ESRCH) /* empty table */
1889 return 0;
069c474e 1890 return err;
2f1eb65f
JHS		 1891 }
1892
f7b6983f 1893 c.data.type = type;
f60f6b8f 1894 c.event = nlh->nlmsg_type;
26b15dad 1895 c.seq = nlh->nlmsg_seq;
15e47304 1896 c.portid = nlh->nlmsg_pid;
7067802e 1897 c.net = net;
26b15dad 1898 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1899 return 0;
1900}
1901
22e70050 1902static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1903 struct nlattr **attrs)
6c5c8ca7 1904{
fc34acd3 1905 struct net *net = sock_net(skb->sk);
6c5c8ca7 1906 struct xfrm_policy *xp;
7b67c857 1907 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1908 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1909 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1910 int err = -ENOENT;
295fae56
JHS		 1911 struct xfrm_mark m;
1912 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1913
35a7aa08 1914 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1915 if (err)
1916 return err;
1917
c8bf4d04
TT		 1918 err = verify_policy_dir(p->dir);
1919 if (err)
1920 return err;
1921
6c5c8ca7 1922 if (p->index)
295fae56 1923 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1924 else {
5424f32e 1925 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1926 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1927
35a7aa08 1928 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1929 if (err)
1930 return err;
1931
2c8dd116 1932 ctx = NULL;
6c5c8ca7 1933 if (rt) {
5424f32e 1934 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1935
03e1ad7b
PM		 1936 err = security_xfrm_policy_alloc(&ctx, uctx);
1937 if (err)
6c5c8ca7 1938 return err;
2c8dd116 1939 }
295fae56 1940 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 1941 &p->sel, ctx, 0, &err);
03e1ad7b 1942 security_xfrm_policy_free(ctx);
6c5c8ca7 1943 }
6c5c8ca7 1944 if (xp == NULL)
ef41aaa0 1945 return -ENOENT;
03e1ad7b 1946
ea2dea9d 1947 if (unlikely(xp->walk.dead))
6c5c8ca7 1948 goto out;
6c5c8ca7 1949
6c5c8ca7
JHS		 1950 err = 0;
1951 if (up->hard) {
e1760bd5 1952 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1953 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed
PM		 1954 u32 sid;
1955
1956 security_task_getsecid(current, &sid);
6c5c8ca7 1957 xfrm_policy_delete(xp, p->dir);
2532386f 1958 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1959
6c5c8ca7
JHS		 1960 } else {
1961 // reset the timers here?
62db5cfd 1962 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7 1963 }
c6bb8136 1964 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 1965
1966out:
1967 xfrm_pol_put(xp);
1968 return err;
1969}
1970
22e70050 1971static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1972 struct nlattr **attrs)
53bc6b4d 1973{
fc34acd3 1974 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1975 struct xfrm_state *x;
1976 int err;
7b67c857 1977 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 1978 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 1979 struct xfrm_mark m;
928497f0 1980 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 1981
6f26b61e 1982 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1983
3a765aa5 1984 err = -ENOENT;
53bc6b4d
JHS		 1985 if (x == NULL)
1986 return err;
1987
53bc6b4d 1988 spin_lock_bh(&x->lock);
3a765aa5 1989 err = -EINVAL;
53bc6b4d
JHS		 1990 if (x->km.state != XFRM_STATE_VALID)
1991 goto out;
c6bb8136 1992 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 1993
161a09e7 1994 if (ue->hard) {
e1760bd5 1995 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1996 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed
PM		 1997 u32 sid;
1998
1999 security_task_getsecid(current, &sid);
53bc6b4d 2000 __xfrm_state_delete(x);
2532386f 2001 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 2002 }
3a765aa5 2003 err = 0;
53bc6b4d
JHS		 2004out:
2005 spin_unlock_bh(&x->lock);
2006 xfrm_state_put(x);
2007 return err;
2008}
2009
22e70050 2010static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2011 struct nlattr **attrs)
980ebd25 2012{
fc34acd3 2013 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2014 struct xfrm_policy *xp;
2015 struct xfrm_user_tmpl *ut;
2016 int i;
5424f32e 2017 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2018 struct xfrm_mark mark;
980ebd25 2019
7b67c857 2020 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2021 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2022 int err = -ENOMEM;
2023
2024 if (!x)
d8eb9307 2025 goto nomem;
980ebd25 2026
6f26b61e
JHS		 2027 xfrm_mark_get(attrs, &mark);
2028
980ebd25 2029 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 2030 if (err)
2031 goto bad_policy;
980ebd25
JHS		 2032
2033 /* build an XP */
fc34acd3 2034 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2035 if (!xp)
2036 goto free_state;
980ebd25
JHS		 2037
2038 memcpy(&x->id, &ua->id, sizeof(ua->id));
2039 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2040 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2041 xp->mark.m = x->mark.m = mark.m;
2042 xp->mark.v = x->mark.v = mark.v;
5424f32e 2043 ut = nla_data(rt);
980ebd25
JHS		 2044 /* extract the templates and for each call km_key */
2045 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2046 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2047 memcpy(&x->id, &t->id, sizeof(x->id));
2048 x->props.mode = t->mode;
2049 x->props.reqid = t->reqid;
2050 x->props.family = ut->family;
2051 t->aalgos = ua->aalgos;
2052 t->ealgos = ua->ealgos;
2053 t->calgos = ua->calgos;
2054 err = km_query(x, t, xp);
2055
2056 }
2057
2058 kfree(x);
2059 kfree(xp);
2060
2061 return 0;
d8eb9307
IJ		 2062
2063bad_policy:
62db5cfd 2064 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2065free_state:
2066 kfree(x);
2067nomem:
2068 return err;
980ebd25
JHS		 2069}
2070
5c79de6e 2071#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2072static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2073 struct xfrm_kmaddress *k,
5424f32e 2074 struct nlattr **attrs, int *num)
5c79de6e 2075{
5424f32e 2076 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2077 struct xfrm_user_migrate *um;
2078 int i, num_migrate;
2079
13c1d189
AE		 2080 if (k != NULL) {
2081 struct xfrm_user_kmaddress *uk;
2082
2083 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2084 memcpy(&k->local, &uk->local, sizeof(k->local));
2085 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2086 k->family = uk->family;
2087 k->reserved = uk->reserved;
2088 }
2089
5424f32e
TG		 2090 um = nla_data(rt);
2091 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2092
2093 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2094 return -EINVAL;
2095
2096 for (i = 0; i < num_migrate; i++, um++, ma++) {
2097 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2098 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2099 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2100 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2101
2102 ma->proto = um->proto;
2103 ma->mode = um->mode;
2104 ma->reqid = um->reqid;
2105
2106 ma->old_family = um->old_family;
2107 ma->new_family = um->new_family;
2108 }
2109
2110 *num = i;
2111 return 0;
2112}
2113
2114static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2115 struct nlattr **attrs)
5c79de6e 2116{
7b67c857 2117 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2118 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2119 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2120 u8 type;
2121 int err;
2122 int n = 0;
8d549c4f 2123 struct net *net = sock_net(skb->sk);
5c79de6e 2124
35a7aa08 2125 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2126 return -EINVAL;
5c79de6e 2127
13c1d189
AE		 2128 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2129
5424f32e 2130 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2131 if (err)
2132 return err;
2133
13c1d189 2134 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2135 if (err)
2136 return err;
2137
2138 if (!n)
2139 return 0;
2140
8d549c4f 2141 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
5c79de6e
SS		 2142
2143 return 0;
2144}
2145#else
2146static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2147 struct nlattr **attrs)
5c79de6e
SS		 2148{
2149 return -ENOPROTOOPT;
2150}
2151#endif
2152
2153#ifdef CONFIG_XFRM_MIGRATE
183cad12 2154static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2155{
2156 struct xfrm_user_migrate um;
2157
2158 memset(&um, 0, sizeof(um));
2159 um.proto = m->proto;
2160 um.mode = m->mode;
2161 um.reqid = m->reqid;
2162 um.old_family = m->old_family;
2163 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2164 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2165 um.new_family = m->new_family;
2166 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2167 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2168
c0144bea 2169 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2170}
2171
183cad12 2172static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2173{
2174 struct xfrm_user_kmaddress uk;
2175
2176 memset(&uk, 0, sizeof(uk));
2177 uk.family = k->family;
2178 uk.reserved = k->reserved;
2179 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2180 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2181
2182 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2183}
2184
2185static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2186{
2187 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2188 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2189 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2190 + userpolicy_type_attrsize();
7deb2264
TG		 2191}
2192
183cad12
DM		 2193static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2194 int num_migrate, const struct xfrm_kmaddress *k,
2195 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2196{
183cad12 2197 const struct xfrm_migrate *mp;
5c79de6e
SS		 2198 struct xfrm_userpolicy_id *pol_id;
2199 struct nlmsghdr *nlh;
1d1e34dd 2200 int i, err;
5c79de6e 2201
79b8b7f4
TG		 2202 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2203 if (nlh == NULL)
2204 return -EMSGSIZE;
5c79de6e 2205
7b67c857 2206 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2207 /* copy data from selector, dir, and type to the pol_id */
2208 memset(pol_id, 0, sizeof(*pol_id));
2209 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2210 pol_id->dir = dir;
2211
1d1e34dd
DM		 2212 if (k != NULL) {
2213 err = copy_to_user_kmaddress(k, skb);
2214 if (err)
2215 goto out_cancel;
2216 }
2217 err = copy_to_user_policy_type(type, skb);
2218 if (err)
2219 goto out_cancel;
5c79de6e 2220 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2221 err = copy_to_user_migrate(mp, skb);
2222 if (err)
2223 goto out_cancel;
5c79de6e
SS		 2224 }
2225
9825069d 2226 return nlmsg_end(skb, nlh);
1d1e34dd
DM		 2227
2228out_cancel:
9825069d 2229 nlmsg_cancel(skb, nlh);
1d1e34dd 2230 return err;
5c79de6e
SS		 2231}
2232
183cad12
DM		 2233static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2234 const struct xfrm_migrate *m, int num_migrate,
2235 const struct xfrm_kmaddress *k)
5c79de6e 2236{
a6483b79 2237 struct net *net = &init_net;
5c79de6e 2238 struct sk_buff *skb;
5c79de6e 2239
13c1d189 2240 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2241 if (skb == NULL)
2242 return -ENOMEM;
2243
2244 /* build migrate */
13c1d189 2245 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2246 BUG();
2247
a6483b79 2248 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2249}
2250#else
183cad12
DM		 2251static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2252 const struct xfrm_migrate *m, int num_migrate,
2253 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2254{
2255 return -ENOPROTOOPT;
2256}
2257#endif
d51d081d 2258
a7bd9a45 2259#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2260
2261static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2262 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2263 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2264 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2265 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2266 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2267 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2268 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2269 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2270 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2271 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2272 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2273 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2274 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2275 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2276 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2277 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2278 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2279 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2280 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2281 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2282};
2283
492b558b
TG		 2284#undef XMSGSIZE
2285
cf5cb79f 2286static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2287 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2288 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2289 [XFRMA_LASTUSED] = { .type = NLA_U64},
2290 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2291 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2292 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2293 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2294 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2295 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2296 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2297 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2298 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2299 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2300 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2301 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2302 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2303 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2304 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2305 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2306 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2307 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2308 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2309 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2310 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
cf5cb79f
TG		 2311};
2312
05600a79 2313static const struct xfrm_link {
5424f32e 2314 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2315 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2316 int (*done)(struct netlink_callback *);
492b558b
TG		 2317} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2318 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2319 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2320 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2321 .dump = xfrm_dump_sa,
2322 .done = xfrm_dump_sa_done },
492b558b
TG		 2323 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2324 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2325 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2326 .dump = xfrm_dump_policy,
2327 .done = xfrm_dump_policy_done },
492b558b 2328 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2329 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2330 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2331 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2332 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2333 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2334 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2335 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2336 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2337 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2338 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2339 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2340 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2341};
2342
1d00a4eb 2343static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2344{
a6483b79 2345 struct net *net = sock_net(skb->sk);
35a7aa08 2346 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2347 const struct xfrm_link *link;
a7bd9a45 2348 int type, err;
1da177e4 2349
1da177e4 2350 type = nlh->nlmsg_type;
1da177e4 2351 if (type > XFRM_MSG_MAX)
1d00a4eb 2352 return -EINVAL;
1da177e4
LT		 2353
2354 type -= XFRM_MSG_BASE;
2355 link = &xfrm_dispatch[type];
2356
2357 /* All operations require privileges, even GET */
df008c91 2358 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2359 return -EPERM;
1da177e4 2360
492b558b
TG		 2361 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2362 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2363 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2364 if (link->dump == NULL)
1d00a4eb 2365 return -EINVAL;
88fc2c84 2366
80d326fa
PNA		 2367 {
2368 struct netlink_dump_control c = {
2369 .dump = link->dump,
2370 .done = link->done,
2371 };
2372 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2373 }
1da177e4
LT		 2374 }
2375
35a7aa08 2376 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2377 xfrma_policy);
a7bd9a45
TG		 2378 if (err < 0)
2379 return err;
1da177e4
LT		 2380
2381 if (link->doit == NULL)
1d00a4eb 2382 return -EINVAL;
1da177e4 2383
5424f32e 2384 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2385}
2386
cd40b7d3 2387static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2388{
283bc9f3
FD		 2389 struct net *net = sock_net(skb->sk);
2390
2391 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2392 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2393 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2394}
2395
7deb2264
TG		 2396static inline size_t xfrm_expire_msgsize(void)
2397{
6f26b61e
JHS		 2398 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2399 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2400}
2401
214e005b 2402static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2403{
2404 struct xfrm_user_expire *ue;
2405 struct nlmsghdr *nlh;
1d1e34dd 2406 int err;
1da177e4 2407
15e47304 2408 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2409 if (nlh == NULL)
2410 return -EMSGSIZE;
1da177e4 2411
7b67c857 2412 ue = nlmsg_data(nlh);
1da177e4 2413 copy_to_user_state(x, &ue->state);
d51d081d 2414 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2415
1d1e34dd
DM		 2416 err = xfrm_mark_put(skb, &x->mark);
2417 if (err)
2418 return err;
6f26b61e 2419
9825069d 2420 return nlmsg_end(skb, nlh);
1da177e4
LT		 2421}
2422
214e005b 2423static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2424{
fc34acd3 2425 struct net *net = xs_net(x);
1da177e4
LT		 2426 struct sk_buff *skb;
2427
7deb2264 2428 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2429 if (skb == NULL)
2430 return -ENOMEM;
2431
6f26b61e
JHS		 2432 if (build_expire(skb, x, c) < 0) {
2433 kfree_skb(skb);
2434 return -EMSGSIZE;
2435 }
1da177e4 2436
a6483b79 2437 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2438}
2439
214e005b 2440static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2441{
fc34acd3 2442 struct net *net = xs_net(x);
d51d081d 2443 struct sk_buff *skb;
d51d081d 2444
d8647b79 2445 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2446 if (skb == NULL)
2447 return -ENOMEM;
2448
2449 if (build_aevent(skb, x, c) < 0)
2450 BUG();
2451
a6483b79 2452 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2453}
2454
214e005b 2455static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2456{
7067802e 2457 struct net *net = c->net;
26b15dad
JHS		 2458 struct xfrm_usersa_flush *p;
2459 struct nlmsghdr *nlh;
2460 struct sk_buff *skb;
7deb2264 2461 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2462
7deb2264 2463 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2464 if (skb == NULL)
2465 return -ENOMEM;
26b15dad 2466
15e47304 2467 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2468 if (nlh == NULL) {
2469 kfree_skb(skb);
2470 return -EMSGSIZE;
2471 }
26b15dad 2472
7b67c857 2473 p = nlmsg_data(nlh);
bf08867f 2474 p->proto = c->data.proto;
26b15dad 2475
9825069d 2476 nlmsg_end(skb, nlh);
26b15dad 2477
a6483b79 2478 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2479}
2480
7deb2264 2481static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2482{
7deb2264 2483 size_t l = 0;
1a6509d9
HX		 2484 if (x->aead)
2485 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2486 if (x->aalg) {
2487 l += nla_total_size(sizeof(struct xfrm_algo) +
2488 (x->aalg->alg_key_len + 7) / 8);
2489 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2490 }
26b15dad 2491 if (x->ealg)
0f99be0d 2492 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2493 if (x->calg)
7deb2264 2494 l += nla_total_size(sizeof(*x->calg));
26b15dad 2495 if (x->encap)
7deb2264 2496 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2497 if (x->tfcpad)
2498 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2499 if (x->replay_esn)
2500 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
68325d3b
HX		 2501 if (x->security)
2502 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2503 x->security->ctx_len);
2504 if (x->coaddr)
2505 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2506 if (x->props.extra_flags)
2507 l += nla_total_size(sizeof(x->props.extra_flags));
68325d3b 2508
d26f3984
HX		 2509 /* Must count x->lastused as it may become non-zero behind our back. */
2510 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2511
2512 return l;
2513}
2514
214e005b 2515static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2516{
fc34acd3 2517 struct net *net = xs_net(x);
26b15dad 2518 struct xfrm_usersa_info *p;
0603eac0 2519 struct xfrm_usersa_id *id;
26b15dad
JHS		 2520 struct nlmsghdr *nlh;
2521 struct sk_buff *skb;
26b15dad 2522 int len = xfrm_sa_len(x);
1d1e34dd 2523 int headlen, err;
0603eac0
HX		 2524
2525 headlen = sizeof(*p);
2526 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2527 len += nla_total_size(headlen);
0603eac0 2528 headlen = sizeof(*id);
6f26b61e 2529 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2530 }
7deb2264 2531 len += NLMSG_ALIGN(headlen);
26b15dad 2532
7deb2264 2533 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2534 if (skb == NULL)
2535 return -ENOMEM;
26b15dad 2536
15e47304 2537 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2538 err = -EMSGSIZE;
79b8b7f4 2539 if (nlh == NULL)
1d1e34dd 2540 goto out_free_skb;
26b15dad 2541
7b67c857 2542 p = nlmsg_data(nlh);
0603eac0 2543 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2544 struct nlattr *attr;
2545
7b67c857 2546 id = nlmsg_data(nlh);
0603eac0
HX		 2547 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2548 id->spi = x->id.spi;
2549 id->family = x->props.family;
2550 id->proto = x->id.proto;
2551
c0144bea 2552 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2553 err = -EMSGSIZE;
c0144bea 2554 if (attr == NULL)
1d1e34dd 2555 goto out_free_skb;
c0144bea
TG		 2556
2557 p = nla_data(attr);
0603eac0 2558 }
1d1e34dd
DM		 2559 err = copy_to_user_state_extra(x, p, skb);
2560 if (err)
2561 goto out_free_skb;
26b15dad 2562
9825069d 2563 nlmsg_end(skb, nlh);
26b15dad 2564
a6483b79 2565 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2566
1d1e34dd 2567out_free_skb:
26b15dad 2568 kfree_skb(skb);
1d1e34dd 2569 return err;
26b15dad
JHS		 2570}
2571
214e005b 2572static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2573{
2574
2575 switch (c->event) {
f60f6b8f 2576 case XFRM_MSG_EXPIRE:
26b15dad 2577 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2578 case XFRM_MSG_NEWAE:
2579 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2580 case XFRM_MSG_DELSA:
2581 case XFRM_MSG_UPDSA:
2582 case XFRM_MSG_NEWSA:
26b15dad 2583 return xfrm_notify_sa(x, c);
f60f6b8f 2584 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2585 return xfrm_notify_sa_flush(c);
2586 default:
62db5cfd 2587 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2588 c->event);
2589 break;
26b15dad
JHS		 2590 }
2591
2592 return 0;
2593
2594}
2595
7deb2264
TG		 2596static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2597 struct xfrm_policy *xp)
2598{
2599 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2600 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2601 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2602 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2603 + userpolicy_type_attrsize();
2604}
2605
1da177e4 2606static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2607 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2608{
1d1e34dd 2609 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2610 struct xfrm_user_acquire *ua;
2611 struct nlmsghdr *nlh;
1d1e34dd 2612 int err;
1da177e4 2613
79b8b7f4
TG		 2614 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2615 if (nlh == NULL)
2616 return -EMSGSIZE;
1da177e4 2617
7b67c857 2618 ua = nlmsg_data(nlh);
1da177e4
LT		 2619 memcpy(&ua->id, &x->id, sizeof(ua->id));
2620 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2621 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2622 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2623 ua->aalgos = xt->aalgos;
2624 ua->ealgos = xt->ealgos;
2625 ua->calgos = xt->calgos;
2626 ua->seq = x->km.seq = seq;
2627
1d1e34dd
DM		 2628 err = copy_to_user_tmpl(xp, skb);
2629 if (!err)
2630 err = copy_to_user_state_sec_ctx(x, skb);
2631 if (!err)
2632 err = copy_to_user_policy_type(xp->type, skb);
2633 if (!err)
2634 err = xfrm_mark_put(skb, &xp->mark);
2635 if (err) {
2636 nlmsg_cancel(skb, nlh);
2637 return err;
2638 }
1da177e4 2639
9825069d 2640 return nlmsg_end(skb, nlh);
1da177e4
LT		 2641}
2642
2643static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2644 struct xfrm_policy *xp)
1da177e4 2645{
a6483b79 2646 struct net *net = xs_net(x);
1da177e4 2647 struct sk_buff *skb;
1da177e4 2648
7deb2264 2649 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2650 if (skb == NULL)
2651 return -ENOMEM;
2652
65e0736b 2653 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2654 BUG();
2655
a6483b79 2656 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2657}
2658
2659/* User gives us xfrm_user_policy_info followed by an array of 0
2660 * or more templates.
2661 */
cb969f07 2662static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2663 u8 *data, int len, int *dir)
2664{
fc34acd3 2665 struct net *net = sock_net(sk);
1da177e4
LT		 2666 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2667 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2668 struct xfrm_policy *xp;
2669 int nr;
2670
cb969f07 2671 switch (sk->sk_family) {
1da177e4
LT		 2672 case AF_INET:
2673 if (opt != IP_XFRM_POLICY) {
2674 *dir = -EOPNOTSUPP;
2675 return NULL;
2676 }
2677 break;
dfd56b8b 2678#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2679 case AF_INET6:
2680 if (opt != IPV6_XFRM_POLICY) {
2681 *dir = -EOPNOTSUPP;
2682 return NULL;
2683 }
2684 break;
2685#endif
2686 default:
2687 *dir = -EINVAL;
2688 return NULL;
2689 }
2690
2691 *dir = -EINVAL;
2692
2693 if (len < sizeof(*p) ||
2694 verify_newpolicy_info(p))
2695 return NULL;
2696
2697 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2698 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2699 return NULL;
2700
a4f1bac6
HX		 2701 if (p->dir > XFRM_POLICY_OUT)
2702 return NULL;
2703
2f09a4d5 2704 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2705 if (xp == NULL) {
2706 *dir = -ENOBUFS;
2707 return NULL;
2708 }
2709
2710 copy_from_user_policy(xp, p);
f7b6983f 2711 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2712 copy_templates(xp, ut, nr);
2713
2714 *dir = p->dir;
2715
2716 return xp;
2717}
2718
7deb2264
TG		 2719static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2720{
2721 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2722 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2723 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2724 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2725 + userpolicy_type_attrsize();
2726}
2727
1da177e4 2728static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2729 int dir, const struct km_event *c)
1da177e4
LT		 2730{
2731 struct xfrm_user_polexpire *upe;
d51d081d 2732 int hard = c->data.hard;
1d1e34dd
DM		 2733 struct nlmsghdr *nlh;
2734 int err;
1da177e4 2735
15e47304 2736 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2737 if (nlh == NULL)
2738 return -EMSGSIZE;
1da177e4 2739
7b67c857 2740 upe = nlmsg_data(nlh);
1da177e4 2741 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2742 err = copy_to_user_tmpl(xp, skb);
2743 if (!err)
2744 err = copy_to_user_sec_ctx(xp, skb);
2745 if (!err)
2746 err = copy_to_user_policy_type(xp->type, skb);
2747 if (!err)
2748 err = xfrm_mark_put(skb, &xp->mark);
2749 if (err) {
2750 nlmsg_cancel(skb, nlh);
2751 return err;
2752 }
1da177e4
LT		 2753 upe->hard = !!hard;
2754
9825069d 2755 return nlmsg_end(skb, nlh);
1da177e4
LT		 2756}
2757
214e005b 2758static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2759{
fc34acd3 2760 struct net *net = xp_net(xp);
1da177e4 2761 struct sk_buff *skb;
1da177e4 2762
7deb2264 2763 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2764 if (skb == NULL)
2765 return -ENOMEM;
2766
d51d081d 2767 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2768 BUG();
2769
a6483b79 2770 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2771}
2772
214e005b 2773static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2774{
1d1e34dd 2775 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2776 struct net *net = xp_net(xp);
26b15dad 2777 struct xfrm_userpolicy_info *p;
0603eac0 2778 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2779 struct nlmsghdr *nlh;
2780 struct sk_buff *skb;
1d1e34dd 2781 int headlen, err;
0603eac0
HX		 2782
2783 headlen = sizeof(*p);
2784 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2785 len += nla_total_size(headlen);
0603eac0
HX		 2786 headlen = sizeof(*id);
2787 }
cfbfd45a 2788 len += userpolicy_type_attrsize();
295fae56 2789 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2790 len += NLMSG_ALIGN(headlen);
26b15dad 2791
7deb2264 2792 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2793 if (skb == NULL)
2794 return -ENOMEM;
26b15dad 2795
15e47304 2796 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2797 err = -EMSGSIZE;
79b8b7f4 2798 if (nlh == NULL)
1d1e34dd 2799 goto out_free_skb;
26b15dad 2800
7b67c857 2801 p = nlmsg_data(nlh);
0603eac0 2802 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2803 struct nlattr *attr;
2804
7b67c857 2805 id = nlmsg_data(nlh);
0603eac0
HX		 2806 memset(id, 0, sizeof(*id));
2807 id->dir = dir;
2808 if (c->data.byid)
2809 id->index = xp->index;
2810 else
2811 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2812
c0144bea 2813 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2814 err = -EMSGSIZE;
c0144bea 2815 if (attr == NULL)
1d1e34dd 2816 goto out_free_skb;
c0144bea
TG		 2817
2818 p = nla_data(attr);
0603eac0 2819 }
26b15dad 2820
26b15dad 2821 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2822 err = copy_to_user_tmpl(xp, skb);
2823 if (!err)
2824 err = copy_to_user_policy_type(xp->type, skb);
2825 if (!err)
2826 err = xfrm_mark_put(skb, &xp->mark);
2827 if (err)
2828 goto out_free_skb;
295fae56 2829
9825069d 2830 nlmsg_end(skb, nlh);
26b15dad 2831
a6483b79 2832 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2833
1d1e34dd 2834out_free_skb:
26b15dad 2835 kfree_skb(skb);
1d1e34dd 2836 return err;
26b15dad
JHS		 2837}
2838
214e005b 2839static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2840{
7067802e 2841 struct net *net = c->net;
26b15dad
JHS		 2842 struct nlmsghdr *nlh;
2843 struct sk_buff *skb;
1d1e34dd 2844 int err;
26b15dad 2845
7deb2264 2846 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2847 if (skb == NULL)
2848 return -ENOMEM;
26b15dad 2849
15e47304 2850 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 2851 err = -EMSGSIZE;
79b8b7f4 2852 if (nlh == NULL)
1d1e34dd
DM		 2853 goto out_free_skb;
2854 err = copy_to_user_policy_type(c->data.type, skb);
2855 if (err)
2856 goto out_free_skb;
26b15dad 2857
9825069d 2858 nlmsg_end(skb, nlh);
26b15dad 2859
a6483b79 2860 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2861
1d1e34dd 2862out_free_skb:
26b15dad 2863 kfree_skb(skb);
1d1e34dd 2864 return err;
26b15dad
JHS		 2865}
2866
214e005b 2867static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2868{
2869
2870 switch (c->event) {
f60f6b8f
HX		 2871 case XFRM_MSG_NEWPOLICY:
2872 case XFRM_MSG_UPDPOLICY:
2873 case XFRM_MSG_DELPOLICY:
26b15dad 2874 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2875 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2876 return xfrm_notify_policy_flush(c);
f60f6b8f 2877 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2878 return xfrm_exp_policy_notify(xp, dir, c);
2879 default:
62db5cfd 2880 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2881 c->event);
26b15dad
JHS		 2882 }
2883
2884 return 0;
2885
2886}
2887
7deb2264
TG		 2888static inline size_t xfrm_report_msgsize(void)
2889{
2890 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2891}
2892
97a64b45
MN		 2893static int build_report(struct sk_buff *skb, u8 proto,
2894 struct xfrm_selector *sel, xfrm_address_t *addr)
2895{
2896 struct xfrm_user_report *ur;
2897 struct nlmsghdr *nlh;
97a64b45 2898
79b8b7f4
TG		 2899 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2900 if (nlh == NULL)
2901 return -EMSGSIZE;
97a64b45 2902
7b67c857 2903 ur = nlmsg_data(nlh);
97a64b45
MN		 2904 ur->proto = proto;
2905 memcpy(&ur->sel, sel, sizeof(ur->sel));
2906
1d1e34dd
DM		 2907 if (addr) {
2908 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2909 if (err) {
2910 nlmsg_cancel(skb, nlh);
2911 return err;
2912 }
2913 }
9825069d 2914 return nlmsg_end(skb, nlh);
97a64b45
MN		 2915}
2916
db983c11
AD		 2917static int xfrm_send_report(struct net *net, u8 proto,
2918 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2919{
2920 struct sk_buff *skb;
97a64b45 2921
7deb2264 2922 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2923 if (skb == NULL)
2924 return -ENOMEM;
2925
2926 if (build_report(skb, proto, sel, addr) < 0)
2927 BUG();
2928
a6483b79 2929 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2930}
2931
3a2dfbe8
MW		 2932static inline size_t xfrm_mapping_msgsize(void)
2933{
2934 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2935}
2936
2937static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2938 xfrm_address_t *new_saddr, __be16 new_sport)
2939{
2940 struct xfrm_user_mapping *um;
2941 struct nlmsghdr *nlh;
2942
2943 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2944 if (nlh == NULL)
2945 return -EMSGSIZE;
2946
2947 um = nlmsg_data(nlh);
2948
2949 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2950 um->id.spi = x->id.spi;
2951 um->id.family = x->props.family;
2952 um->id.proto = x->id.proto;
2953 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2954 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2955 um->new_sport = new_sport;
2956 um->old_sport = x->encap->encap_sport;
2957 um->reqid = x->props.reqid;
2958
2959 return nlmsg_end(skb, nlh);
2960}
2961
2962static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2963 __be16 sport)
2964{
a6483b79 2965 struct net *net = xs_net(x);
3a2dfbe8
MW		 2966 struct sk_buff *skb;
2967
2968 if (x->id.proto != IPPROTO_ESP)
2969 return -EINVAL;
2970
2971 if (!x->encap)
2972 return -EINVAL;
2973
2974 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2975 if (skb == NULL)
2976 return -ENOMEM;
2977
2978 if (build_mapping(skb, x, ipaddr, sport) < 0)
2979 BUG();
2980
a6483b79 2981 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2982}
2983
1da177e4
LT		 2984static struct xfrm_mgr netlink_mgr = {
2985 .id = "netlink",
2986 .notify = xfrm_send_state_notify,
2987 .acquire = xfrm_send_acquire,
2988 .compile_policy = xfrm_compile_policy,
2989 .notify_policy = xfrm_send_policy_notify,
97a64b45 2990 .report = xfrm_send_report,
5c79de6e 2991 .migrate = xfrm_send_migrate,
3a2dfbe8 2992 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2993};
2994
a6483b79 2995static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2996{
be33690d 2997 struct sock *nlsk;
a31f2d17
PNA		 2998 struct netlink_kernel_cfg cfg = {
2999 .groups = XFRMNLGRP_MAX,
3000 .input = xfrm_netlink_rcv,
3001 };
be33690d 3002
9f00d977 3003 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3004 if (nlsk == NULL)
1da177e4 3005 return -ENOMEM;
d79d792e 3006 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3007 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3008 return 0;
3009}
3010
d79d792e 3011static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3012{
d79d792e
EB		 3013 struct net *net;
3014 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3015 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3016 synchronize_net();
3017 list_for_each_entry(net, net_exit_list, exit_list)
3018 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3019}
3020
a6483b79 3021static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3022 .init = xfrm_user_net_init,
3023 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3024};
3025
3026static int __init xfrm_user_init(void)
3027{
3028 int rv;
3029
3030 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3031
3032 rv = register_pernet_subsys(&xfrm_user_net_ops);
3033 if (rv < 0)
3034 return rv;
3035 rv = xfrm_register_km(&netlink_mgr);
3036 if (rv < 0)
3037 unregister_pernet_subsys(&xfrm_user_net_ops);
3038 return rv;
3039}
3040
3041static void __exit xfrm_user_exit(void)
3042{
3043 xfrm_unregister_km(&netlink_mgr);
3044 unregister_pernet_subsys(&xfrm_user_net_ops);
3045}
3046
1da177e4
LT		 3047module_init(xfrm_user_init);
3048module_exit(xfrm_user_exit);
3049MODULE_LICENSE("GPL");
4fdb3bb7 3050MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3051
Linux kernel - Deliverables
This page took 1.072246 seconds and 5 git commands to generate.